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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 | ||
861687d4 JG |
136 | if (match->key->phy.in_port == DP_MAX_PORTS && |
137 | match->mask && (match->mask->key.phy.in_port == 0xffff)) | |
138 | mask_allowed |= (1ULL << OVS_KEY_ATTR_IN_PORT); | |
139 | ||
a1c564be AZ |
140 | if (match->key->eth.type == htons(ETH_P_802_2) && |
141 | match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
142 | mask_allowed |= (1ULL << OVS_KEY_ATTR_ETHERTYPE); | |
143 | ||
144 | /* Check key attributes. */ | |
145 | if (match->key->eth.type == htons(ETH_P_ARP) | |
146 | || match->key->eth.type == htons(ETH_P_RARP)) { | |
147 | key_expected |= 1ULL << OVS_KEY_ATTR_ARP; | |
148 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
149 | mask_allowed |= 1ULL << OVS_KEY_ATTR_ARP; | |
150 | } | |
151 | ||
152 | if (match->key->eth.type == htons(ETH_P_IP)) { | |
153 | key_expected |= 1ULL << OVS_KEY_ATTR_IPV4; | |
154 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
155 | mask_allowed |= 1ULL << OVS_KEY_ATTR_IPV4; | |
156 | ||
157 | if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { | |
158 | if (match->key->ip.proto == IPPROTO_UDP) { | |
159 | key_expected |= 1ULL << OVS_KEY_ATTR_UDP; | |
160 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
161 | mask_allowed |= 1ULL << OVS_KEY_ATTR_UDP; | |
162 | } | |
163 | ||
164 | if (match->key->ip.proto == IPPROTO_TCP) { | |
165 | key_expected |= 1ULL << OVS_KEY_ATTR_TCP; | |
166 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
167 | mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP; | |
168 | } | |
169 | ||
170 | if (match->key->ip.proto == IPPROTO_ICMP) { | |
171 | key_expected |= 1ULL << OVS_KEY_ATTR_ICMP; | |
172 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
173 | mask_allowed |= 1ULL << OVS_KEY_ATTR_ICMP; | |
174 | } | |
175 | } | |
176 | } | |
177 | ||
178 | if (match->key->eth.type == htons(ETH_P_IPV6)) { | |
179 | key_expected |= 1ULL << OVS_KEY_ATTR_IPV6; | |
180 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
181 | mask_allowed |= 1ULL << OVS_KEY_ATTR_IPV6; | |
182 | ||
183 | if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { | |
184 | if (match->key->ip.proto == IPPROTO_UDP) { | |
185 | key_expected |= 1ULL << OVS_KEY_ATTR_UDP; | |
186 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
187 | mask_allowed |= 1ULL << OVS_KEY_ATTR_UDP; | |
188 | } | |
189 | ||
190 | if (match->key->ip.proto == IPPROTO_TCP) { | |
191 | key_expected |= 1ULL << OVS_KEY_ATTR_TCP; | |
192 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
193 | mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP; | |
194 | } | |
195 | ||
196 | if (match->key->ip.proto == IPPROTO_ICMPV6) { | |
197 | key_expected |= 1ULL << OVS_KEY_ATTR_ICMPV6; | |
198 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
199 | mask_allowed |= 1ULL << OVS_KEY_ATTR_ICMPV6; | |
200 | ||
201 | if (match->key->ipv6.tp.src == | |
202 | htons(NDISC_NEIGHBOUR_SOLICITATION) || | |
203 | match->key->ipv6.tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) { | |
204 | key_expected |= 1ULL << OVS_KEY_ATTR_ND; | |
205 | if (match->mask && (match->mask->key.ipv6.tp.src == htons(0xffff))) | |
206 | mask_allowed |= 1ULL << OVS_KEY_ATTR_ND; | |
207 | } | |
208 | } | |
209 | } | |
210 | } | |
211 | ||
1b936472 | 212 | if ((key_attrs & key_expected) != key_expected) { |
a1c564be | 213 | /* Key attributes check failed. */ |
1b936472 AZ |
214 | OVS_NLERR("Missing expected key attributes (key_attrs=%llx, expected=%llx).\n", |
215 | key_attrs, key_expected); | |
a1c564be | 216 | return false; |
1b936472 | 217 | } |
a1c564be | 218 | |
1b936472 | 219 | if ((mask_attrs & mask_allowed) != mask_attrs) { |
a1c564be | 220 | /* Mask attributes check failed. */ |
1b936472 AZ |
221 | OVS_NLERR("Contain more than allowed mask fields (mask_attrs=%llx, mask_allowed=%llx).\n", |
222 | mask_attrs, mask_allowed); | |
a1c564be | 223 | return false; |
1b936472 | 224 | } |
a1c564be AZ |
225 | |
226 | return true; | |
227 | } | |
228 | ||
2db65bf7 JG |
229 | static int check_header(struct sk_buff *skb, int len) |
230 | { | |
231 | if (unlikely(skb->len < len)) | |
232 | return -EINVAL; | |
233 | if (unlikely(!pskb_may_pull(skb, len))) | |
234 | return -ENOMEM; | |
235 | return 0; | |
236 | } | |
237 | ||
6455100f | 238 | static bool arphdr_ok(struct sk_buff *skb) |
a26ef517 | 239 | { |
2db65bf7 JG |
240 | return pskb_may_pull(skb, skb_network_offset(skb) + |
241 | sizeof(struct arp_eth_header)); | |
a26ef517 JP |
242 | } |
243 | ||
6455100f | 244 | static int check_iphdr(struct sk_buff *skb) |
064af421 | 245 | { |
4c1ad233 BP |
246 | unsigned int nh_ofs = skb_network_offset(skb); |
247 | unsigned int ip_len; | |
2db65bf7 | 248 | int err; |
4c1ad233 | 249 | |
2db65bf7 JG |
250 | err = check_header(skb, nh_ofs + sizeof(struct iphdr)); |
251 | if (unlikely(err)) | |
252 | return err; | |
4c1ad233 BP |
253 | |
254 | ip_len = ip_hdrlen(skb); | |
2db65bf7 JG |
255 | if (unlikely(ip_len < sizeof(struct iphdr) || |
256 | skb->len < nh_ofs + ip_len)) | |
4c1ad233 BP |
257 | return -EINVAL; |
258 | ||
4c1ad233 BP |
259 | skb_set_transport_header(skb, nh_ofs + ip_len); |
260 | return 0; | |
064af421 BP |
261 | } |
262 | ||
6455100f | 263 | static bool tcphdr_ok(struct sk_buff *skb) |
064af421 BP |
264 | { |
265 | int th_ofs = skb_transport_offset(skb); | |
2db65bf7 JG |
266 | int tcp_len; |
267 | ||
268 | if (unlikely(!pskb_may_pull(skb, th_ofs + sizeof(struct tcphdr)))) | |
269 | return false; | |
270 | ||
271 | tcp_len = tcp_hdrlen(skb); | |
272 | if (unlikely(tcp_len < sizeof(struct tcphdr) || | |
273 | skb->len < th_ofs + tcp_len)) | |
274 | return false; | |
275 | ||
276 | return true; | |
064af421 BP |
277 | } |
278 | ||
6455100f | 279 | static bool udphdr_ok(struct sk_buff *skb) |
064af421 | 280 | { |
2db65bf7 JG |
281 | return pskb_may_pull(skb, skb_transport_offset(skb) + |
282 | sizeof(struct udphdr)); | |
064af421 BP |
283 | } |
284 | ||
6455100f | 285 | static bool icmphdr_ok(struct sk_buff *skb) |
064af421 | 286 | { |
2db65bf7 JG |
287 | return pskb_may_pull(skb, skb_transport_offset(skb) + |
288 | sizeof(struct icmphdr)); | |
064af421 BP |
289 | } |
290 | ||
850b6b3b | 291 | u64 ovs_flow_used_time(unsigned long flow_jiffies) |
ec58547a JG |
292 | { |
293 | struct timespec cur_ts; | |
294 | u64 cur_ms, idle_ms; | |
295 | ||
296 | ktime_get_ts(&cur_ts); | |
297 | idle_ms = jiffies_to_msecs(jiffies - flow_jiffies); | |
298 | cur_ms = (u64)cur_ts.tv_sec * MSEC_PER_SEC + | |
299 | cur_ts.tv_nsec / NSEC_PER_MSEC; | |
300 | ||
301 | return cur_ms - idle_ms; | |
302 | } | |
303 | ||
a1c564be | 304 | static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key) |
d31f1109 JP |
305 | { |
306 | unsigned int nh_ofs = skb_network_offset(skb); | |
307 | unsigned int nh_len; | |
308 | int payload_ofs; | |
d31f1109 JP |
309 | struct ipv6hdr *nh; |
310 | uint8_t nexthdr; | |
0fd0d083 | 311 | __be16 frag_off; |
2db65bf7 | 312 | int err; |
d31f1109 | 313 | |
2db65bf7 JG |
314 | err = check_header(skb, nh_ofs + sizeof(*nh)); |
315 | if (unlikely(err)) | |
316 | return err; | |
d31f1109 JP |
317 | |
318 | nh = ipv6_hdr(skb); | |
319 | nexthdr = nh->nexthdr; | |
320 | payload_ofs = (u8 *)(nh + 1) - skb->data; | |
d31f1109 | 321 | |
28bad473 | 322 | key->ip.proto = NEXTHDR_NONE; |
530180fd | 323 | key->ip.tos = ipv6_get_dsfield(nh); |
a61680c6 | 324 | key->ip.ttl = nh->hop_limit; |
fa8223b7 | 325 | key->ipv6.label = *(__be32 *)nh & htonl(IPV6_FLOWINFO_FLOWLABEL); |
858d1026 JG |
326 | key->ipv6.addr.src = nh->saddr; |
327 | key->ipv6.addr.dst = nh->daddr; | |
d31f1109 | 328 | |
0fd0d083 | 329 | payload_ofs = ipv6_skip_exthdr(skb, payload_ofs, &nexthdr, &frag_off); |
bfef4717 | 330 | if (unlikely(payload_ofs < 0)) |
d31f1109 | 331 | return -EINVAL; |
bfef4717 | 332 | |
0fd0d083 JG |
333 | if (frag_off) { |
334 | if (frag_off & htons(~0x7)) | |
335 | key->ip.frag = OVS_FRAG_TYPE_LATER; | |
336 | else | |
337 | key->ip.frag = OVS_FRAG_TYPE_FIRST; | |
338 | } | |
339 | ||
d31f1109 | 340 | nh_len = payload_ofs - nh_ofs; |
d31f1109 | 341 | skb_set_transport_header(skb, nh_ofs + nh_len); |
28bad473 | 342 | key->ip.proto = nexthdr; |
d31f1109 JP |
343 | return nh_len; |
344 | } | |
345 | ||
346 | static bool icmp6hdr_ok(struct sk_buff *skb) | |
347 | { | |
2db65bf7 JG |
348 | return pskb_may_pull(skb, skb_transport_offset(skb) + |
349 | sizeof(struct icmp6hdr)); | |
d31f1109 | 350 | } |
ec58547a | 351 | |
a1c564be AZ |
352 | static void flow_key_mask(struct sw_flow_key *dst, |
353 | const struct sw_flow_key *src, | |
354 | const struct sw_flow_mask *mask) | |
355 | { | |
356 | u8 *m = (u8 *)&mask->key + mask->range.start; | |
357 | u8 *s = (u8 *)src + mask->range.start; | |
358 | u8 *d = (u8 *)dst + mask->range.start; | |
359 | int i; | |
360 | ||
361 | memset(dst, 0, sizeof(*dst)); | |
362 | for (i = 0; i < ovs_sw_flow_mask_size_roundup(mask); i++) { | |
363 | *d = *s & *m; | |
364 | d++, s++, m++; | |
365 | } | |
366 | } | |
367 | ||
064af421 BP |
368 | #define TCP_FLAGS_OFFSET 13 |
369 | #define TCP_FLAG_MASK 0x3f | |
370 | ||
850b6b3b | 371 | void ovs_flow_used(struct sw_flow *flow, struct sk_buff *skb) |
064af421 | 372 | { |
064af421 BP |
373 | u8 tcp_flags = 0; |
374 | ||
11460e23 JG |
375 | if ((flow->key.eth.type == htons(ETH_P_IP) || |
376 | flow->key.eth.type == htons(ETH_P_IPV6)) && | |
9c47b45a JG |
377 | flow->key.ip.proto == IPPROTO_TCP && |
378 | likely(skb->len >= skb_transport_offset(skb) + sizeof(struct tcphdr))) { | |
abfec865 BP |
379 | u8 *tcp = (u8 *)tcp_hdr(skb); |
380 | tcp_flags = *(tcp + TCP_FLAGS_OFFSET) & TCP_FLAG_MASK; | |
064af421 BP |
381 | } |
382 | ||
e9141eec | 383 | spin_lock(&flow->lock); |
6bfafa55 | 384 | flow->used = jiffies; |
064af421 BP |
385 | flow->packet_count++; |
386 | flow->byte_count += skb->len; | |
387 | flow->tcp_flags |= tcp_flags; | |
e9141eec | 388 | spin_unlock(&flow->lock); |
064af421 BP |
389 | } |
390 | ||
9b405f1a | 391 | struct sw_flow_actions *ovs_flow_actions_alloc(int size) |
064af421 BP |
392 | { |
393 | struct sw_flow_actions *sfa; | |
394 | ||
9b405f1a | 395 | if (size > MAX_ACTIONS_BUFSIZE) |
064af421 BP |
396 | return ERR_PTR(-EINVAL); |
397 | ||
ba400435 | 398 | sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL); |
064af421 BP |
399 | if (!sfa) |
400 | return ERR_PTR(-ENOMEM); | |
401 | ||
9b405f1a | 402 | sfa->actions_len = 0; |
064af421 BP |
403 | return sfa; |
404 | } | |
405 | ||
850b6b3b | 406 | struct sw_flow *ovs_flow_alloc(void) |
560e8022 JG |
407 | { |
408 | struct sw_flow *flow; | |
409 | ||
410 | flow = kmem_cache_alloc(flow_cache, GFP_KERNEL); | |
411 | if (!flow) | |
412 | return ERR_PTR(-ENOMEM); | |
413 | ||
414 | spin_lock_init(&flow->lock); | |
6f04e94a | 415 | flow->sf_acts = NULL; |
a1c564be | 416 | flow->mask = NULL; |
064af421 | 417 | |
560e8022 JG |
418 | return flow; |
419 | } | |
420 | ||
be2ba156 | 421 | static struct hlist_head *find_bucket(struct flow_table *table, u32 hash) |
8d5ebd83 | 422 | { |
acd051f1 | 423 | hash = jhash_1word(hash, table->hash_seed); |
3544358a PS |
424 | return flex_array_get(table->buckets, |
425 | (hash & (table->n_buckets - 1))); | |
426 | } | |
427 | ||
be2ba156 | 428 | static struct flex_array *alloc_buckets(unsigned int n_buckets) |
3544358a | 429 | { |
be2ba156 | 430 | struct flex_array *buckets; |
3544358a PS |
431 | int i, err; |
432 | ||
433 | buckets = flex_array_alloc(sizeof(struct hlist_head *), | |
434 | n_buckets, GFP_KERNEL); | |
435 | if (!buckets) | |
436 | return NULL; | |
437 | ||
438 | err = flex_array_prealloc(buckets, 0, n_buckets, GFP_KERNEL); | |
439 | if (err) { | |
440 | flex_array_free(buckets); | |
441 | return NULL; | |
442 | } | |
443 | ||
444 | for (i = 0; i < n_buckets; i++) | |
445 | INIT_HLIST_HEAD((struct hlist_head *) | |
446 | flex_array_get(buckets, i)); | |
447 | ||
448 | return buckets; | |
449 | } | |
450 | ||
6455100f | 451 | static void free_buckets(struct flex_array *buckets) |
3544358a PS |
452 | { |
453 | flex_array_free(buckets); | |
454 | } | |
455 | ||
ede77a46 | 456 | static struct flow_table *__flow_tbl_alloc(int new_size) |
3544358a PS |
457 | { |
458 | struct flow_table *table = kmalloc(sizeof(*table), GFP_KERNEL); | |
459 | ||
460 | if (!table) | |
461 | return NULL; | |
462 | ||
463 | table->buckets = alloc_buckets(new_size); | |
464 | ||
465 | if (!table->buckets) { | |
466 | kfree(table); | |
467 | return NULL; | |
468 | } | |
469 | table->n_buckets = new_size; | |
470 | table->count = 0; | |
acd051f1 PS |
471 | table->node_ver = 0; |
472 | table->keep_flows = false; | |
473 | get_random_bytes(&table->hash_seed, sizeof(u32)); | |
ede77a46 | 474 | table->mask_list = NULL; |
3544358a PS |
475 | |
476 | return table; | |
477 | } | |
fb8c9347 | 478 | |
a1c564be | 479 | static void __flow_tbl_destroy(struct flow_table *table) |
3544358a PS |
480 | { |
481 | int i; | |
482 | ||
acd051f1 PS |
483 | if (table->keep_flows) |
484 | goto skip_flows; | |
485 | ||
3544358a PS |
486 | for (i = 0; i < table->n_buckets; i++) { |
487 | struct sw_flow *flow; | |
488 | struct hlist_head *head = flex_array_get(table->buckets, i); | |
f8dfbcb7 | 489 | struct hlist_node *n; |
acd051f1 | 490 | int ver = table->node_ver; |
3544358a | 491 | |
f8dfbcb7 | 492 | hlist_for_each_entry_safe(flow, n, head, hash_node[ver]) { |
acd051f1 | 493 | hlist_del_rcu(&flow->hash_node[ver]); |
a1c564be | 494 | ovs_flow_free(flow, false); |
3544358a PS |
495 | } |
496 | } | |
497 | ||
ede77a46 AZ |
498 | BUG_ON(!list_empty(table->mask_list)); |
499 | kfree(table->mask_list); | |
500 | ||
acd051f1 | 501 | skip_flows: |
3544358a PS |
502 | free_buckets(table->buckets); |
503 | kfree(table); | |
504 | } | |
505 | ||
ede77a46 AZ |
506 | struct flow_table *ovs_flow_tbl_alloc(int new_size) |
507 | { | |
508 | struct flow_table *table = __flow_tbl_alloc(new_size); | |
509 | ||
510 | if (!table) | |
511 | return NULL; | |
512 | ||
513 | table->mask_list = kmalloc(sizeof(struct list_head), GFP_KERNEL); | |
514 | if (!table->mask_list) { | |
515 | table->keep_flows = true; | |
516 | __flow_tbl_destroy(table); | |
517 | return NULL; | |
518 | } | |
519 | INIT_LIST_HEAD(table->mask_list); | |
520 | ||
521 | return table; | |
522 | } | |
523 | ||
3544358a PS |
524 | static void flow_tbl_destroy_rcu_cb(struct rcu_head *rcu) |
525 | { | |
526 | struct flow_table *table = container_of(rcu, struct flow_table, rcu); | |
527 | ||
a1c564be | 528 | __flow_tbl_destroy(table); |
3544358a PS |
529 | } |
530 | ||
a1c564be | 531 | void ovs_flow_tbl_destroy(struct flow_table *table, bool deferred) |
3544358a | 532 | { |
6455100f PS |
533 | if (!table) |
534 | return; | |
3544358a | 535 | |
a1c564be AZ |
536 | if (deferred) |
537 | call_rcu(&table->rcu, flow_tbl_destroy_rcu_cb); | |
538 | else | |
539 | __flow_tbl_destroy(table); | |
3544358a PS |
540 | } |
541 | ||
a1c564be | 542 | struct sw_flow *ovs_flow_dump_next(struct flow_table *table, u32 *bucket, u32 *last) |
3544358a PS |
543 | { |
544 | struct sw_flow *flow; | |
545 | struct hlist_head *head; | |
acd051f1 | 546 | int ver; |
3544358a PS |
547 | int i; |
548 | ||
acd051f1 | 549 | ver = table->node_ver; |
3544358a PS |
550 | while (*bucket < table->n_buckets) { |
551 | i = 0; | |
552 | head = flex_array_get(table->buckets, *bucket); | |
f8dfbcb7 | 553 | hlist_for_each_entry_rcu(flow, head, hash_node[ver]) { |
3544358a PS |
554 | if (i < *last) { |
555 | i++; | |
556 | continue; | |
557 | } | |
558 | *last = i + 1; | |
559 | return flow; | |
560 | } | |
561 | (*bucket)++; | |
562 | *last = 0; | |
563 | } | |
564 | ||
565 | return NULL; | |
566 | } | |
567 | ||
a1c564be | 568 | static void __tbl_insert(struct flow_table *table, struct sw_flow *flow) |
13e24889 PS |
569 | { |
570 | struct hlist_head *head; | |
a1c564be | 571 | |
13e24889 PS |
572 | head = find_bucket(table, flow->hash); |
573 | hlist_add_head_rcu(&flow->hash_node[table->node_ver], head); | |
a1c564be | 574 | |
13e24889 PS |
575 | table->count++; |
576 | } | |
577 | ||
acd051f1 | 578 | static void flow_table_copy_flows(struct flow_table *old, struct flow_table *new) |
3544358a | 579 | { |
acd051f1 | 580 | int old_ver; |
3544358a PS |
581 | int i; |
582 | ||
acd051f1 PS |
583 | old_ver = old->node_ver; |
584 | new->node_ver = !old_ver; | |
3544358a | 585 | |
acd051f1 PS |
586 | /* Insert in new table. */ |
587 | for (i = 0; i < old->n_buckets; i++) { | |
3544358a PS |
588 | struct sw_flow *flow; |
589 | struct hlist_head *head; | |
3544358a | 590 | |
acd051f1 | 591 | head = flex_array_get(old->buckets, i); |
3544358a | 592 | |
f8dfbcb7 | 593 | hlist_for_each_entry(flow, head, hash_node[old_ver]) |
a1c564be | 594 | __tbl_insert(new, flow); |
3544358a | 595 | } |
a1c564be AZ |
596 | |
597 | new->mask_list = old->mask_list; | |
acd051f1 PS |
598 | old->keep_flows = true; |
599 | } | |
600 | ||
601 | static struct flow_table *__flow_tbl_rehash(struct flow_table *table, int n_buckets) | |
602 | { | |
603 | struct flow_table *new_table; | |
604 | ||
ede77a46 | 605 | new_table = __flow_tbl_alloc(n_buckets); |
acd051f1 PS |
606 | if (!new_table) |
607 | return ERR_PTR(-ENOMEM); | |
608 | ||
609 | flow_table_copy_flows(table, new_table); | |
3544358a PS |
610 | |
611 | return new_table; | |
612 | } | |
613 | ||
acd051f1 PS |
614 | struct flow_table *ovs_flow_tbl_rehash(struct flow_table *table) |
615 | { | |
616 | return __flow_tbl_rehash(table, table->n_buckets); | |
617 | } | |
618 | ||
619 | struct flow_table *ovs_flow_tbl_expand(struct flow_table *table) | |
620 | { | |
621 | return __flow_tbl_rehash(table, table->n_buckets * 2); | |
622 | } | |
623 | ||
a1c564be | 624 | static void __flow_free(struct sw_flow *flow) |
9321954a | 625 | { |
9321954a JG |
626 | kfree((struct sf_flow_acts __force *)flow->sf_acts); |
627 | kmem_cache_free(flow_cache, flow); | |
628 | } | |
629 | ||
064af421 BP |
630 | static void rcu_free_flow_callback(struct rcu_head *rcu) |
631 | { | |
632 | struct sw_flow *flow = container_of(rcu, struct sw_flow, rcu); | |
fb8c9347 | 633 | |
a1c564be | 634 | __flow_free(flow); |
064af421 BP |
635 | } |
636 | ||
a1c564be | 637 | void ovs_flow_free(struct sw_flow *flow, bool deferred) |
064af421 | 638 | { |
a1c564be AZ |
639 | if (!flow) |
640 | return; | |
641 | ||
642 | ovs_sw_flow_mask_del_ref((struct sw_flow_mask __force *)flow->mask, | |
643 | deferred); | |
644 | ||
645 | if (deferred) | |
646 | call_rcu(&flow->rcu, rcu_free_flow_callback); | |
647 | else | |
648 | __flow_free(flow); | |
064af421 BP |
649 | } |
650 | ||
850b6b3b | 651 | /* RCU callback used by ovs_flow_deferred_free_acts. */ |
064af421 BP |
652 | static void rcu_free_acts_callback(struct rcu_head *rcu) |
653 | { | |
d295e8e9 | 654 | struct sw_flow_actions *sf_acts = container_of(rcu, |
064af421 | 655 | struct sw_flow_actions, rcu); |
ba400435 | 656 | kfree(sf_acts); |
064af421 BP |
657 | } |
658 | ||
659 | /* Schedules 'sf_acts' to be freed after the next RCU grace period. | |
660 | * The caller must hold rcu_read_lock for this to be sensible. */ | |
850b6b3b | 661 | void ovs_flow_deferred_free_acts(struct sw_flow_actions *sf_acts) |
064af421 BP |
662 | { |
663 | call_rcu(&sf_acts->rcu, rcu_free_acts_callback); | |
664 | } | |
665 | ||
2db65bf7 | 666 | static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key) |
064af421 | 667 | { |
50f06e16 BP |
668 | struct qtag_prefix { |
669 | __be16 eth_type; /* ETH_P_8021Q */ | |
670 | __be16 tci; | |
671 | }; | |
672 | struct qtag_prefix *qp; | |
673 | ||
8ddc056d BP |
674 | if (unlikely(skb->len < sizeof(struct qtag_prefix) + sizeof(__be16))) |
675 | return 0; | |
676 | ||
2db65bf7 JG |
677 | if (unlikely(!pskb_may_pull(skb, sizeof(struct qtag_prefix) + |
678 | sizeof(__be16)))) | |
679 | return -ENOMEM; | |
50f06e16 BP |
680 | |
681 | qp = (struct qtag_prefix *) skb->data; | |
76abe283 | 682 | key->eth.tci = qp->tci | htons(VLAN_TAG_PRESENT); |
50f06e16 | 683 | __skb_pull(skb, sizeof(struct qtag_prefix)); |
2db65bf7 JG |
684 | |
685 | return 0; | |
50f06e16 BP |
686 | } |
687 | ||
688 | static __be16 parse_ethertype(struct sk_buff *skb) | |
064af421 | 689 | { |
50f06e16 BP |
690 | struct llc_snap_hdr { |
691 | u8 dsap; /* Always 0xAA */ | |
692 | u8 ssap; /* Always 0xAA */ | |
693 | u8 ctrl; | |
694 | u8 oui[3]; | |
8dda8c9b | 695 | __be16 ethertype; |
50f06e16 BP |
696 | }; |
697 | struct llc_snap_hdr *llc; | |
698 | __be16 proto; | |
699 | ||
700 | proto = *(__be16 *) skb->data; | |
701 | __skb_pull(skb, sizeof(__be16)); | |
702 | ||
7cd46155 | 703 | if (ntohs(proto) >= ETH_P_802_3_MIN) |
50f06e16 BP |
704 | return proto; |
705 | ||
2db65bf7 | 706 | if (skb->len < sizeof(struct llc_snap_hdr)) |
36956a7d | 707 | return htons(ETH_P_802_2); |
50f06e16 | 708 | |
2db65bf7 JG |
709 | if (unlikely(!pskb_may_pull(skb, sizeof(struct llc_snap_hdr)))) |
710 | return htons(0); | |
711 | ||
50f06e16 BP |
712 | llc = (struct llc_snap_hdr *) skb->data; |
713 | if (llc->dsap != LLC_SAP_SNAP || | |
714 | llc->ssap != LLC_SAP_SNAP || | |
715 | (llc->oui[0] | llc->oui[1] | llc->oui[2]) != 0) | |
36956a7d | 716 | return htons(ETH_P_802_2); |
50f06e16 BP |
717 | |
718 | __skb_pull(skb, sizeof(struct llc_snap_hdr)); | |
9e69bc5f | 719 | |
7cd46155 | 720 | if (ntohs(llc->ethertype) >= ETH_P_802_3_MIN) |
9e69bc5f RL |
721 | return llc->ethertype; |
722 | ||
723 | return htons(ETH_P_802_2); | |
064af421 BP |
724 | } |
725 | ||
685a51a5 | 726 | static int parse_icmpv6(struct sk_buff *skb, struct sw_flow_key *key, |
a1c564be | 727 | int nh_len) |
685a51a5 | 728 | { |
685a51a5 JP |
729 | struct icmp6hdr *icmp = icmp6_hdr(skb); |
730 | ||
731 | /* The ICMPv6 type and code fields use the 16-bit transport port | |
bfef4717 JG |
732 | * fields, so we need to store them in 16-bit network byte order. |
733 | */ | |
76abe283 AE |
734 | key->ipv6.tp.src = htons(icmp->icmp6_type); |
735 | key->ipv6.tp.dst = htons(icmp->icmp6_code); | |
685a51a5 | 736 | |
bfef4717 JG |
737 | if (icmp->icmp6_code == 0 && |
738 | (icmp->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION || | |
739 | icmp->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT)) { | |
e977ba19 | 740 | int icmp_len = skb->len - skb_transport_offset(skb); |
685a51a5 JP |
741 | struct nd_msg *nd; |
742 | int offset; | |
743 | ||
744 | /* In order to process neighbor discovery options, we need the | |
bfef4717 JG |
745 | * entire packet. |
746 | */ | |
747 | if (unlikely(icmp_len < sizeof(*nd))) | |
a1c564be AZ |
748 | return 0; |
749 | ||
750 | if (unlikely(skb_linearize(skb))) | |
751 | return -ENOMEM; | |
685a51a5 JP |
752 | |
753 | nd = (struct nd_msg *)skb_transport_header(skb); | |
858d1026 | 754 | key->ipv6.nd.target = nd->target; |
685a51a5 JP |
755 | |
756 | icmp_len -= sizeof(*nd); | |
757 | offset = 0; | |
758 | while (icmp_len >= 8) { | |
6455100f PS |
759 | struct nd_opt_hdr *nd_opt = |
760 | (struct nd_opt_hdr *)(nd->opt + offset); | |
685a51a5 JP |
761 | int opt_len = nd_opt->nd_opt_len * 8; |
762 | ||
bfef4717 | 763 | if (unlikely(!opt_len || opt_len > icmp_len)) |
a1c564be | 764 | return 0; |
685a51a5 | 765 | |
bfef4717 JG |
766 | /* Store the link layer address if the appropriate |
767 | * option is provided. It is considered an error if | |
768 | * the same link layer option is specified twice. | |
769 | */ | |
685a51a5 | 770 | if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LL_ADDR |
bfef4717 | 771 | && opt_len == 8) { |
76abe283 | 772 | if (unlikely(!is_zero_ether_addr(key->ipv6.nd.sll))) |
685a51a5 | 773 | goto invalid; |
76abe283 | 774 | memcpy(key->ipv6.nd.sll, |
bfef4717 | 775 | &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN); |
685a51a5 | 776 | } else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LL_ADDR |
bfef4717 | 777 | && opt_len == 8) { |
76abe283 | 778 | if (unlikely(!is_zero_ether_addr(key->ipv6.nd.tll))) |
685a51a5 | 779 | goto invalid; |
76abe283 | 780 | memcpy(key->ipv6.nd.tll, |
bfef4717 | 781 | &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN); |
685a51a5 JP |
782 | } |
783 | ||
784 | icmp_len -= opt_len; | |
785 | offset += opt_len; | |
786 | } | |
787 | } | |
788 | ||
a1c564be | 789 | return 0; |
685a51a5 JP |
790 | |
791 | invalid: | |
76abe283 AE |
792 | memset(&key->ipv6.nd.target, 0, sizeof(key->ipv6.nd.target)); |
793 | memset(key->ipv6.nd.sll, 0, sizeof(key->ipv6.nd.sll)); | |
794 | memset(key->ipv6.nd.tll, 0, sizeof(key->ipv6.nd.tll)); | |
685a51a5 | 795 | |
a1c564be | 796 | return 0; |
685a51a5 JP |
797 | } |
798 | ||
a31e0e31 | 799 | /** |
850b6b3b | 800 | * ovs_flow_extract - extracts a flow key from an Ethernet frame. |
a31e0e31 BP |
801 | * @skb: sk_buff that contains the frame, with skb->data pointing to the |
802 | * Ethernet header | |
803 | * @in_port: port number on which @skb was received. | |
804 | * @key: output flow key | |
76abe283 | 805 | * @key_lenp: length of output flow key |
a31e0e31 BP |
806 | * |
807 | * The caller must ensure that skb->len >= ETH_HLEN. | |
808 | * | |
4c1ad233 BP |
809 | * Returns 0 if successful, otherwise a negative errno value. |
810 | * | |
59a18f80 BP |
811 | * Initializes @skb header pointers as follows: |
812 | * | |
813 | * - skb->mac_header: the Ethernet header. | |
814 | * | |
815 | * - skb->network_header: just past the Ethernet header, or just past the | |
816 | * VLAN header, to the first byte of the Ethernet payload. | |
817 | * | |
ae9020cf | 818 | * - skb->transport_header: If key->eth.type is ETH_P_IP or ETH_P_IPV6 |
d31f1109 JP |
819 | * on output, then just past the IP header, if one is present and |
820 | * of a correct length, otherwise the same as skb->network_header. | |
ae9020cf | 821 | * For other key->eth.type values it is left untouched. |
a31e0e31 | 822 | */ |
a1c564be | 823 | int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key) |
064af421 | 824 | { |
a1c564be | 825 | int error; |
064af421 | 826 | struct ethhdr *eth; |
064af421 | 827 | |
84c17d98 | 828 | memset(key, 0, sizeof(*key)); |
abff858b PS |
829 | |
830 | key->phy.priority = skb->priority; | |
356af50b | 831 | if (OVS_CB(skb)->tun_key) |
6694e498 | 832 | memcpy(&key->tun_key, OVS_CB(skb)->tun_key, sizeof(key->tun_key)); |
abff858b | 833 | key->phy.in_port = in_port; |
72e8bf28 | 834 | key->phy.skb_mark = skb_get_mark(skb); |
064af421 | 835 | |
064af421 | 836 | skb_reset_mac_header(skb); |
064af421 | 837 | |
2db65bf7 JG |
838 | /* Link layer. We are guaranteed to have at least the 14 byte Ethernet |
839 | * header in the linear data area. | |
840 | */ | |
50f06e16 | 841 | eth = eth_hdr(skb); |
76abe283 AE |
842 | memcpy(key->eth.src, eth->h_source, ETH_ALEN); |
843 | memcpy(key->eth.dst, eth->h_dest, ETH_ALEN); | |
844 | ||
50f06e16 | 845 | __skb_pull(skb, 2 * ETH_ALEN); |
3cfede14 PS |
846 | /* We are going to push all headers that we pull, so no need to |
847 | * update skb->csum here. */ | |
6ce39213 JG |
848 | |
849 | if (vlan_tx_tag_present(skb)) | |
76abe283 | 850 | key->eth.tci = htons(vlan_get_tci(skb)); |
6ce39213 | 851 | else if (eth->h_proto == htons(ETH_P_8021Q)) |
2db65bf7 JG |
852 | if (unlikely(parse_vlan(skb, key))) |
853 | return -ENOMEM; | |
6ce39213 | 854 | |
76abe283 AE |
855 | key->eth.type = parse_ethertype(skb); |
856 | if (unlikely(key->eth.type == htons(0))) | |
2db65bf7 JG |
857 | return -ENOMEM; |
858 | ||
50f06e16 | 859 | skb_reset_network_header(skb); |
2db65bf7 | 860 | __skb_push(skb, skb->data - skb_mac_header(skb)); |
064af421 BP |
861 | |
862 | /* Network layer. */ | |
76abe283 | 863 | if (key->eth.type == htons(ETH_P_IP)) { |
4c1ad233 | 864 | struct iphdr *nh; |
7257b535 | 865 | __be16 offset; |
76abe283 | 866 | |
4c1ad233 BP |
867 | error = check_iphdr(skb); |
868 | if (unlikely(error)) { | |
869 | if (error == -EINVAL) { | |
870 | skb->transport_header = skb->network_header; | |
76abe283 | 871 | error = 0; |
4c1ad233 | 872 | } |
a1c564be | 873 | return error; |
4c1ad233 BP |
874 | } |
875 | ||
876 | nh = ip_hdr(skb); | |
76abe283 AE |
877 | key->ipv4.addr.src = nh->saddr; |
878 | key->ipv4.addr.dst = nh->daddr; | |
7257b535 | 879 | |
28bad473 | 880 | key->ip.proto = nh->protocol; |
530180fd | 881 | key->ip.tos = nh->tos; |
a61680c6 | 882 | key->ip.ttl = nh->ttl; |
064af421 | 883 | |
7257b535 BP |
884 | offset = nh->frag_off & htons(IP_OFFSET); |
885 | if (offset) { | |
9e44d715 | 886 | key->ip.frag = OVS_FRAG_TYPE_LATER; |
a1c564be | 887 | return 0; |
7257b535 BP |
888 | } |
889 | if (nh->frag_off & htons(IP_MF) || | |
890 | skb_shinfo(skb)->gso_type & SKB_GSO_UDP) | |
9e44d715 | 891 | key->ip.frag = OVS_FRAG_TYPE_FIRST; |
b7a31ec1 | 892 | |
7257b535 | 893 | /* Transport layer. */ |
28bad473 | 894 | if (key->ip.proto == IPPROTO_TCP) { |
7257b535 | 895 | if (tcphdr_ok(skb)) { |
5f4d087c JG |
896 | struct tcphdr *tcp = tcp_hdr(skb); |
897 | key->ipv4.tp.src = tcp->source; | |
898 | key->ipv4.tp.dst = tcp->dest; | |
899 | } | |
28bad473 | 900 | } else if (key->ip.proto == IPPROTO_UDP) { |
7257b535 | 901 | if (udphdr_ok(skb)) { |
5f4d087c JG |
902 | struct udphdr *udp = udp_hdr(skb); |
903 | key->ipv4.tp.src = udp->source; | |
904 | key->ipv4.tp.dst = udp->dest; | |
905 | } | |
28bad473 | 906 | } else if (key->ip.proto == IPPROTO_ICMP) { |
7257b535 | 907 | if (icmphdr_ok(skb)) { |
5f4d087c JG |
908 | struct icmphdr *icmp = icmp_hdr(skb); |
909 | /* The ICMP type and code fields use the 16-bit | |
6455100f PS |
910 | * transport port fields, so we need to store |
911 | * them in 16-bit network byte order. */ | |
5f4d087c JG |
912 | key->ipv4.tp.src = htons(icmp->type); |
913 | key->ipv4.tp.dst = htons(icmp->code); | |
914 | } | |
915 | } | |
916 | ||
8087f5ff MM |
917 | } else if ((key->eth.type == htons(ETH_P_ARP) || |
918 | key->eth.type == htons(ETH_P_RARP)) && arphdr_ok(skb)) { | |
a26ef517 JP |
919 | struct arp_eth_header *arp; |
920 | ||
921 | arp = (struct arp_eth_header *)skb_network_header(skb); | |
922 | ||
f5e86186 | 923 | if (arp->ar_hrd == htons(ARPHRD_ETHER) |
de3f65ea JP |
924 | && arp->ar_pro == htons(ETH_P_IP) |
925 | && arp->ar_hln == ETH_ALEN | |
926 | && arp->ar_pln == 4) { | |
927 | ||
928 | /* We only match on the lower 8 bits of the opcode. */ | |
b7a31ec1 | 929 | if (ntohs(arp->ar_op) <= 0xff) |
28bad473 | 930 | key->ip.proto = ntohs(arp->ar_op); |
a3d3ad0c MM |
931 | memcpy(&key->ipv4.addr.src, arp->ar_sip, sizeof(key->ipv4.addr.src)); |
932 | memcpy(&key->ipv4.addr.dst, arp->ar_tip, sizeof(key->ipv4.addr.dst)); | |
933 | memcpy(key->ipv4.arp.sha, arp->ar_sha, ETH_ALEN); | |
934 | memcpy(key->ipv4.arp.tha, arp->ar_tha, ETH_ALEN); | |
de3f65ea | 935 | } |
76abe283 | 936 | } else if (key->eth.type == htons(ETH_P_IPV6)) { |
d31f1109 JP |
937 | int nh_len; /* IPv6 Header + Extensions */ |
938 | ||
a1c564be | 939 | nh_len = parse_ipv6hdr(skb, key); |
d31f1109 | 940 | if (unlikely(nh_len < 0)) { |
a1c564be | 941 | if (nh_len == -EINVAL) { |
d31f1109 | 942 | skb->transport_header = skb->network_header; |
a1c564be AZ |
943 | error = 0; |
944 | } else { | |
76abe283 | 945 | error = nh_len; |
a1c564be AZ |
946 | } |
947 | return error; | |
d31f1109 JP |
948 | } |
949 | ||
9e44d715 | 950 | if (key->ip.frag == OVS_FRAG_TYPE_LATER) |
a1c564be | 951 | return 0; |
7257b535 | 952 | if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP) |
9e44d715 | 953 | key->ip.frag = OVS_FRAG_TYPE_FIRST; |
7257b535 | 954 | |
d31f1109 | 955 | /* Transport layer. */ |
28bad473 | 956 | if (key->ip.proto == NEXTHDR_TCP) { |
d31f1109 JP |
957 | if (tcphdr_ok(skb)) { |
958 | struct tcphdr *tcp = tcp_hdr(skb); | |
76abe283 AE |
959 | key->ipv6.tp.src = tcp->source; |
960 | key->ipv6.tp.dst = tcp->dest; | |
d31f1109 | 961 | } |
28bad473 | 962 | } else if (key->ip.proto == NEXTHDR_UDP) { |
d31f1109 JP |
963 | if (udphdr_ok(skb)) { |
964 | struct udphdr *udp = udp_hdr(skb); | |
76abe283 AE |
965 | key->ipv6.tp.src = udp->source; |
966 | key->ipv6.tp.dst = udp->dest; | |
d31f1109 | 967 | } |
28bad473 | 968 | } else if (key->ip.proto == NEXTHDR_ICMP) { |
d31f1109 | 969 | if (icmp6hdr_ok(skb)) { |
a1c564be AZ |
970 | error = parse_icmpv6(skb, key, nh_len); |
971 | if (error) | |
972 | return error; | |
d31f1109 JP |
973 | } |
974 | } | |
064af421 | 975 | } |
76abe283 | 976 | |
a1c564be | 977 | return 0; |
064af421 BP |
978 | } |
979 | ||
13e24889 | 980 | static u32 ovs_flow_hash(const struct sw_flow_key *key, int key_start, int key_len) |
8d5ebd83 | 981 | { |
13e24889 PS |
982 | return jhash2((u32 *)((u8 *)key + key_start), |
983 | DIV_ROUND_UP(key_len - key_start, sizeof(u32)), 0); | |
984 | } | |
985 | ||
a1c564be | 986 | static int flow_key_start(const struct sw_flow_key *key) |
13e24889 | 987 | { |
6694e498 | 988 | if (key->tun_key.ipv4_dst) |
13e24889 PS |
989 | return 0; |
990 | else | |
6694e498 | 991 | return offsetof(struct sw_flow_key, phy); |
8d5ebd83 JG |
992 | } |
993 | ||
a1c564be AZ |
994 | static bool __cmp_key(const struct sw_flow_key *key1, |
995 | const struct sw_flow_key *key2, int key_start, int key_len) | |
996 | { | |
997 | return !memcmp((u8 *)key1 + key_start, | |
998 | (u8 *)key2 + key_start, (key_len - key_start)); | |
999 | } | |
1000 | ||
1001 | static bool __flow_cmp_key(const struct sw_flow *flow, | |
1002 | const struct sw_flow_key *key, int key_start, int key_len) | |
1003 | { | |
1004 | return __cmp_key(&flow->key, key, key_start, key_len); | |
1005 | } | |
1006 | ||
1007 | static bool __flow_cmp_unmasked_key(const struct sw_flow *flow, | |
1008 | const struct sw_flow_key *key, int key_start, int key_len) | |
1009 | { | |
1010 | return __cmp_key(&flow->unmasked_key, key, key_start, key_len); | |
1011 | } | |
1012 | ||
1013 | bool ovs_flow_cmp_unmasked_key(const struct sw_flow *flow, | |
1014 | const struct sw_flow_key *key, int key_len) | |
1015 | { | |
1016 | int key_start; | |
1017 | key_start = flow_key_start(key); | |
1018 | ||
1019 | return __flow_cmp_unmasked_key(flow, key, key_start, key_len); | |
1020 | ||
1021 | } | |
1022 | ||
1023 | struct sw_flow *ovs_flow_lookup_unmasked_key(struct flow_table *table, | |
1024 | struct sw_flow_match *match) | |
1025 | { | |
1026 | struct sw_flow_key *unmasked = match->key; | |
1027 | int key_len = match->range.end; | |
1028 | struct sw_flow *flow; | |
1029 | ||
1030 | flow = ovs_flow_lookup(table, unmasked); | |
1031 | if (flow && (!ovs_flow_cmp_unmasked_key(flow, unmasked, key_len))) | |
1032 | flow = NULL; | |
1033 | ||
1034 | return flow; | |
1035 | } | |
1036 | ||
1037 | static struct sw_flow *ovs_masked_flow_lookup(struct flow_table *table, | |
1038 | const struct sw_flow_key *flow_key, | |
1039 | struct sw_flow_mask *mask) | |
8d5ebd83 | 1040 | { |
3544358a | 1041 | struct sw_flow *flow; |
3544358a | 1042 | struct hlist_head *head; |
a1c564be AZ |
1043 | int key_start = mask->range.start; |
1044 | int key_len = mask->range.end; | |
3544358a | 1045 | u32 hash; |
a1c564be | 1046 | struct sw_flow_key masked_key; |
8d5ebd83 | 1047 | |
a1c564be AZ |
1048 | flow_key_mask(&masked_key, flow_key, mask); |
1049 | hash = ovs_flow_hash(&masked_key, key_start, key_len); | |
3544358a | 1050 | head = find_bucket(table, hash); |
f8dfbcb7 | 1051 | hlist_for_each_entry_rcu(flow, head, hash_node[table->node_ver]) { |
a1c564be | 1052 | if (__flow_cmp_key(flow, &masked_key, key_start, key_len)) |
3544358a | 1053 | return flow; |
3544358a PS |
1054 | } |
1055 | return NULL; | |
1056 | } | |
1057 | ||
a1c564be AZ |
1058 | struct sw_flow *ovs_flow_lookup(struct flow_table *tbl, |
1059 | const struct sw_flow_key *key) | |
3544358a | 1060 | { |
a1c564be AZ |
1061 | struct sw_flow *flow = NULL; |
1062 | struct sw_flow_mask *mask; | |
1063 | ||
ede77a46 | 1064 | list_for_each_entry_rcu(mask, tbl->mask_list, list) { |
a1c564be AZ |
1065 | flow = ovs_masked_flow_lookup(tbl, key, mask); |
1066 | if (flow) /* Found */ | |
1067 | break; | |
1068 | } | |
1069 | ||
1070 | return flow; | |
3544358a PS |
1071 | } |
1072 | ||
a1c564be AZ |
1073 | |
1074 | void ovs_flow_insert(struct flow_table *table, struct sw_flow *flow, | |
1075 | const struct sw_flow_key *key, int key_len) | |
1076 | { | |
1077 | flow->unmasked_key = *key; | |
1078 | flow_key_mask(&flow->key, &flow->unmasked_key, ovsl_dereference(flow->mask)); | |
1079 | flow->hash = ovs_flow_hash(&flow->key, | |
1080 | ovsl_dereference(flow->mask)->range.start, | |
1081 | ovsl_dereference(flow->mask)->range.end); | |
1082 | __tbl_insert(table, flow); | |
1083 | } | |
1084 | ||
1085 | void ovs_flow_remove(struct flow_table *table, struct sw_flow *flow) | |
3544358a | 1086 | { |
49c7f80c | 1087 | BUG_ON(table->count == 0); |
acd051f1 PS |
1088 | hlist_del_rcu(&flow->hash_node[table->node_ver]); |
1089 | table->count--; | |
36956a7d BP |
1090 | } |
1091 | ||
df2c07f4 | 1092 | /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */ |
4094406f BP |
1093 | const int ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = { |
1094 | [OVS_KEY_ATTR_ENCAP] = -1, | |
a1bf209f BP |
1095 | [OVS_KEY_ATTR_PRIORITY] = sizeof(u32), |
1096 | [OVS_KEY_ATTR_IN_PORT] = sizeof(u32), | |
72e8bf28 | 1097 | [OVS_KEY_ATTR_SKB_MARK] = sizeof(u32), |
df2c07f4 | 1098 | [OVS_KEY_ATTR_ETHERNET] = sizeof(struct ovs_key_ethernet), |
fea393b1 | 1099 | [OVS_KEY_ATTR_VLAN] = sizeof(__be16), |
a1bf209f | 1100 | [OVS_KEY_ATTR_ETHERTYPE] = sizeof(__be16), |
df2c07f4 JP |
1101 | [OVS_KEY_ATTR_IPV4] = sizeof(struct ovs_key_ipv4), |
1102 | [OVS_KEY_ATTR_IPV6] = sizeof(struct ovs_key_ipv6), | |
1103 | [OVS_KEY_ATTR_TCP] = sizeof(struct ovs_key_tcp), | |
1104 | [OVS_KEY_ATTR_UDP] = sizeof(struct ovs_key_udp), | |
1105 | [OVS_KEY_ATTR_ICMP] = sizeof(struct ovs_key_icmp), | |
1106 | [OVS_KEY_ATTR_ICMPV6] = sizeof(struct ovs_key_icmpv6), | |
1107 | [OVS_KEY_ATTR_ARP] = sizeof(struct ovs_key_arp), | |
1108 | [OVS_KEY_ATTR_ND] = sizeof(struct ovs_key_nd), | |
9b405f1a | 1109 | [OVS_KEY_ATTR_TUNNEL] = -1, |
80e5eed9 BP |
1110 | }; |
1111 | ||
a1c564be | 1112 | static bool is_all_zero(const u8 *fp, size_t size) |
34118cae | 1113 | { |
a1c564be | 1114 | int i; |
34118cae | 1115 | |
a1c564be AZ |
1116 | if (!fp) |
1117 | return false; | |
34118cae | 1118 | |
a1c564be AZ |
1119 | for (i = 0; i < size; i++) |
1120 | if (fp[i]) | |
1121 | return false; | |
34118cae | 1122 | |
a1c564be | 1123 | return true; |
34118cae BP |
1124 | } |
1125 | ||
a1c564be AZ |
1126 | static int __parse_flow_nlattrs(const struct nlattr *attr, |
1127 | const struct nlattr *a[], | |
1128 | u64 *attrsp, bool nz) | |
fea393b1 BP |
1129 | { |
1130 | const struct nlattr *nla; | |
1131 | u64 attrs; | |
1132 | int rem; | |
1133 | ||
a1c564be | 1134 | attrs = *attrsp; |
fea393b1 BP |
1135 | nla_for_each_nested(nla, attr, rem) { |
1136 | u16 type = nla_type(nla); | |
4094406f | 1137 | int expected_len; |
fea393b1 | 1138 | |
1b936472 AZ |
1139 | if (type > OVS_KEY_ATTR_MAX) { |
1140 | OVS_NLERR("Unknown key attribute (type=%d, max=%d).\n", | |
1141 | type, OVS_KEY_ATTR_MAX); | |
1142 | } | |
4094406f | 1143 | |
1b936472 AZ |
1144 | if (attrs & (1ULL << type)) { |
1145 | OVS_NLERR("Duplicate key attribute (type %d).\n", type); | |
4094406f | 1146 | return -EINVAL; |
1b936472 | 1147 | } |
4094406f | 1148 | |
1b936472 AZ |
1149 | expected_len = ovs_key_lens[type]; |
1150 | if (nla_len(nla) != expected_len && expected_len != -1) { | |
1151 | OVS_NLERR("Key attribute has unexpected length (type=%d" | |
1152 | ", length=%d, expected=%d).\n", type, | |
1153 | nla_len(nla), expected_len); | |
a1c564be | 1154 | return -EINVAL; |
1b936472 | 1155 | } |
a1c564be AZ |
1156 | |
1157 | if (!nz || !is_all_zero(nla_data(nla), expected_len)) { | |
1158 | attrs |= 1ULL << type; | |
1159 | a[type] = nla; | |
1160 | } | |
fea393b1 | 1161 | } |
1b936472 AZ |
1162 | if (rem) { |
1163 | OVS_NLERR("Message has %d unknown bytes.\n", rem); | |
fea393b1 | 1164 | return -EINVAL; |
1b936472 | 1165 | } |
fea393b1 BP |
1166 | |
1167 | *attrsp = attrs; | |
1168 | return 0; | |
1169 | } | |
1170 | ||
a1c564be AZ |
1171 | static int parse_flow_mask_nlattrs(const struct nlattr *attr, |
1172 | const struct nlattr *a[], u64 *attrsp) | |
1173 | { | |
1174 | return __parse_flow_nlattrs(attr, a, attrsp, true); | |
1175 | } | |
1176 | ||
1177 | static int parse_flow_nlattrs(const struct nlattr *attr, | |
1178 | const struct nlattr *a[], u64 *attrsp) | |
1179 | { | |
1180 | return __parse_flow_nlattrs(attr, a, attrsp, false); | |
1181 | } | |
1182 | ||
9b405f1a | 1183 | int ipv4_tun_from_nlattr(const struct nlattr *attr, |
a1c564be | 1184 | struct sw_flow_match *match, bool is_mask) |
9b405f1a PS |
1185 | { |
1186 | struct nlattr *a; | |
1187 | int rem; | |
1188 | bool ttl = false; | |
5ebaf571 | 1189 | __be16 tun_flags = 0; |
9b405f1a PS |
1190 | |
1191 | nla_for_each_nested(a, attr, rem) { | |
1192 | int type = nla_type(a); | |
1193 | static const u32 ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = { | |
1194 | [OVS_TUNNEL_KEY_ATTR_ID] = sizeof(u64), | |
1195 | [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = sizeof(u32), | |
1196 | [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = sizeof(u32), | |
1197 | [OVS_TUNNEL_KEY_ATTR_TOS] = 1, | |
1198 | [OVS_TUNNEL_KEY_ATTR_TTL] = 1, | |
1199 | [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = 0, | |
1200 | [OVS_TUNNEL_KEY_ATTR_CSUM] = 0, | |
1201 | }; | |
1202 | ||
1b936472 | 1203 | if (type > OVS_TUNNEL_KEY_ATTR_MAX) { |
17ce1965 | 1204 | OVS_NLERR("Unknown IPv4 tunnel attribute (type=%d, max=%d).\n", |
1b936472 AZ |
1205 | type, OVS_TUNNEL_KEY_ATTR_MAX); |
1206 | return -EINVAL; | |
1207 | } | |
1208 | ||
1209 | if (ovs_tunnel_key_lens[type] != nla_len(a)) { | |
1210 | OVS_NLERR("IPv4 tunnel attribute type has unexpected " | |
17ce1965 | 1211 | " legnth (type=%d, length=%d, expected=%d).\n", |
1b936472 | 1212 | type, nla_len(a), ovs_tunnel_key_lens[type]); |
9b405f1a | 1213 | return -EINVAL; |
1b936472 | 1214 | } |
9b405f1a PS |
1215 | |
1216 | switch (type) { | |
1217 | case OVS_TUNNEL_KEY_ATTR_ID: | |
a1c564be AZ |
1218 | SW_FLOW_KEY_PUT(match, tun_key.tun_id, |
1219 | nla_get_be64(a), is_mask); | |
5ebaf571 | 1220 | tun_flags |= TUNNEL_KEY; |
9b405f1a PS |
1221 | break; |
1222 | case OVS_TUNNEL_KEY_ATTR_IPV4_SRC: | |
a1c564be AZ |
1223 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_src, |
1224 | nla_get_be32(a), is_mask); | |
9b405f1a PS |
1225 | break; |
1226 | case OVS_TUNNEL_KEY_ATTR_IPV4_DST: | |
a1c564be AZ |
1227 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_dst, |
1228 | nla_get_be32(a), is_mask); | |
9b405f1a PS |
1229 | break; |
1230 | case OVS_TUNNEL_KEY_ATTR_TOS: | |
a1c564be AZ |
1231 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_tos, |
1232 | nla_get_u8(a), is_mask); | |
9b405f1a PS |
1233 | break; |
1234 | case OVS_TUNNEL_KEY_ATTR_TTL: | |
a1c564be AZ |
1235 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_ttl, |
1236 | nla_get_u8(a), is_mask); | |
9b405f1a PS |
1237 | ttl = true; |
1238 | break; | |
1239 | case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT: | |
5ebaf571 | 1240 | tun_flags |= TUNNEL_DONT_FRAGMENT; |
9b405f1a PS |
1241 | break; |
1242 | case OVS_TUNNEL_KEY_ATTR_CSUM: | |
5ebaf571 | 1243 | tun_flags |= TUNNEL_CSUM; |
9b405f1a PS |
1244 | break; |
1245 | default: | |
1246 | return -EINVAL; | |
9b405f1a PS |
1247 | } |
1248 | } | |
a1c564be AZ |
1249 | |
1250 | SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask); | |
1251 | ||
1b936472 AZ |
1252 | if (rem > 0) { |
1253 | OVS_NLERR("IPv4 tunnel attribute has %d unknown bytes.\n", rem); | |
9b405f1a | 1254 | return -EINVAL; |
1b936472 | 1255 | } |
9b405f1a | 1256 | |
1b936472 AZ |
1257 | if (!match->key->tun_key.ipv4_dst) { |
1258 | OVS_NLERR("IPv4 tunnel destination address is zero.\n"); | |
9b405f1a | 1259 | return -EINVAL; |
1b936472 | 1260 | } |
9b405f1a | 1261 | |
1b936472 AZ |
1262 | if (!ttl) { |
1263 | OVS_NLERR("IPv4 tunnel TTL is zero.\n"); | |
9b405f1a | 1264 | return -EINVAL; |
1b936472 | 1265 | } |
9b405f1a PS |
1266 | |
1267 | return 0; | |
1268 | } | |
1269 | ||
1270 | int ipv4_tun_to_nlattr(struct sk_buff *skb, | |
a1c564be AZ |
1271 | const struct ovs_key_ipv4_tunnel *tun_key, |
1272 | const struct ovs_key_ipv4_tunnel *output) | |
9b405f1a PS |
1273 | { |
1274 | struct nlattr *nla; | |
1275 | ||
1276 | nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL); | |
1277 | if (!nla) | |
1278 | return -EMSGSIZE; | |
1279 | ||
5ebaf571 | 1280 | if (tun_key->tun_flags & TUNNEL_KEY && |
a1c564be | 1281 | nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id)) |
9b405f1a PS |
1282 | return -EMSGSIZE; |
1283 | if (tun_key->ipv4_src && | |
a1c564be | 1284 | nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, output->ipv4_src)) |
9b405f1a | 1285 | return -EMSGSIZE; |
a1c564be | 1286 | if (nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST, output->ipv4_dst)) |
9b405f1a PS |
1287 | return -EMSGSIZE; |
1288 | if (tun_key->ipv4_tos && | |
a1c564be | 1289 | nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->ipv4_tos)) |
9b405f1a | 1290 | return -EMSGSIZE; |
a1c564be | 1291 | if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ipv4_ttl)) |
9b405f1a | 1292 | return -EMSGSIZE; |
5ebaf571 | 1293 | if ((tun_key->tun_flags & TUNNEL_DONT_FRAGMENT) && |
9b405f1a PS |
1294 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT)) |
1295 | return -EMSGSIZE; | |
5ebaf571 | 1296 | if ((tun_key->tun_flags & TUNNEL_CSUM) && |
9b405f1a PS |
1297 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM)) |
1298 | return -EMSGSIZE; | |
1299 | ||
1300 | nla_nest_end(skb, nla); | |
1301 | return 0; | |
1302 | } | |
1303 | ||
36956a7d | 1304 | |
a1c564be AZ |
1305 | static int metadata_from_nlattrs(struct sw_flow_match *match, u64 *attrs, |
1306 | const struct nlattr **a, bool is_mask) | |
1307 | { | |
1308 | if (*attrs & (1ULL << OVS_KEY_ATTR_PRIORITY)) { | |
1309 | SW_FLOW_KEY_PUT(match, phy.priority, | |
1310 | nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask); | |
1311 | *attrs &= ~(1ULL << OVS_KEY_ATTR_PRIORITY); | |
34118cae | 1312 | } |
a1c564be AZ |
1313 | |
1314 | if (*attrs & (1ULL << OVS_KEY_ATTR_IN_PORT)) { | |
34118cae | 1315 | u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]); |
a1c564be AZ |
1316 | |
1317 | if (!is_mask && in_port >= DP_MAX_PORTS) | |
34118cae | 1318 | return -EINVAL; |
a1c564be AZ |
1319 | SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask); |
1320 | *attrs &= ~(1ULL << OVS_KEY_ATTR_IN_PORT); | |
861687d4 JG |
1321 | } else if (!is_mask) { |
1322 | SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask); | |
34118cae | 1323 | } |
a1c564be AZ |
1324 | |
1325 | if (*attrs & (1ULL << OVS_KEY_ATTR_SKB_MARK)) { | |
72e8bf28 AA |
1326 | uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]); |
1327 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20) && !defined(CONFIG_NETFILTER) | |
1b936472 AZ |
1328 | if (!is_mask && mark != 0) { |
1329 | OVS_NLERR("skb->mark must be zero on this kernel (mark=%d).\n", mark); | |
72e8bf28 | 1330 | return -EINVAL; |
1b936472 | 1331 | } |
72e8bf28 | 1332 | #endif |
a1c564be AZ |
1333 | SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask); |
1334 | *attrs &= ~(1ULL << OVS_KEY_ATTR_SKB_MARK); | |
1335 | } | |
1336 | if (*attrs & (1ULL << OVS_KEY_ATTR_TUNNEL)) { | |
1337 | if (ipv4_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match, | |
1338 | is_mask)) | |
1339 | return -EINVAL; | |
1340 | *attrs &= ~(1ULL << OVS_KEY_ATTR_TUNNEL); | |
72e8bf28 | 1341 | } |
a1c564be AZ |
1342 | return 0; |
1343 | } | |
36956a7d | 1344 | |
a1c564be AZ |
1345 | static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs, |
1346 | const struct nlattr **a, bool is_mask) | |
1347 | { | |
1348 | int err; | |
828f5f64 | 1349 | u64 orig_attrs = attrs; |
5c7f5883 | 1350 | |
a1c564be AZ |
1351 | err = metadata_from_nlattrs(match, &attrs, a, is_mask); |
1352 | if (err) | |
1353 | return err; | |
76abe283 | 1354 | |
a1c564be AZ |
1355 | if (attrs & (1ULL << OVS_KEY_ATTR_ETHERNET)) { |
1356 | const struct ovs_key_ethernet *eth_key; | |
36956a7d | 1357 | |
a1c564be AZ |
1358 | eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]); |
1359 | SW_FLOW_KEY_MEMCPY(match, eth.src, | |
1360 | eth_key->eth_src, ETH_ALEN, is_mask); | |
1361 | SW_FLOW_KEY_MEMCPY(match, eth.dst, | |
1362 | eth_key->eth_dst, ETH_ALEN, is_mask); | |
1363 | attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERNET); | |
1364 | } | |
76abe283 | 1365 | |
a1c564be | 1366 | if (attrs & (1ULL << OVS_KEY_ATTR_VLAN)) { |
8ddc056d BP |
1367 | __be16 tci; |
1368 | ||
a1c564be | 1369 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); |
9bbd9da0 | 1370 | if (!is_mask) |
1b936472 AZ |
1371 | if (!(tci & htons(VLAN_TAG_PRESENT))) { |
1372 | OVS_NLERR("VLAN TCI does not have VLAN_TAG_PRESENT bit set.\n"); | |
9bbd9da0 | 1373 | return -EINVAL; |
1b936472 | 1374 | } |
36956a7d | 1375 | |
a1c564be AZ |
1376 | SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask); |
1377 | attrs &= ~(1ULL << OVS_KEY_ATTR_VLAN); | |
1378 | } | |
8ddc056d | 1379 | |
a1c564be AZ |
1380 | if (attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)) { |
1381 | __be16 eth_type; | |
8ddc056d | 1382 | |
a1c564be | 1383 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); |
1b936472 AZ |
1384 | if (!is_mask && ntohs(eth_type) < ETH_P_802_3_MIN) { |
1385 | OVS_NLERR("EtherType is less than mimimum (type=%x, min=%x).\n", | |
1386 | ntohs(eth_type), ETH_P_802_3_MIN); | |
8ddc056d | 1387 | return -EINVAL; |
1b936472 | 1388 | } |
a1c564be AZ |
1389 | |
1390 | SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask); | |
1391 | attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE); | |
1392 | } else if (!is_mask) { | |
1393 | SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask); | |
34118cae BP |
1394 | } |
1395 | ||
a1c564be AZ |
1396 | if (attrs & (1ULL << OVS_KEY_ATTR_IPV4)) { |
1397 | const struct ovs_key_ipv4 *ipv4_key; | |
1398 | ||
1399 | ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]); | |
1b936472 AZ |
1400 | if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) { |
1401 | OVS_NLERR("Unknown IPv4 fragment type (value=%d, max=%d).\n", | |
1402 | ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX); | |
34118cae | 1403 | return -EINVAL; |
1b936472 | 1404 | } |
a1c564be AZ |
1405 | SW_FLOW_KEY_PUT(match, ip.proto, |
1406 | ipv4_key->ipv4_proto, is_mask); | |
1407 | SW_FLOW_KEY_PUT(match, ip.tos, | |
1408 | ipv4_key->ipv4_tos, is_mask); | |
1409 | SW_FLOW_KEY_PUT(match, ip.ttl, | |
1410 | ipv4_key->ipv4_ttl, is_mask); | |
1411 | SW_FLOW_KEY_PUT(match, ip.frag, | |
1412 | ipv4_key->ipv4_frag, is_mask); | |
1413 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, | |
1414 | ipv4_key->ipv4_src, is_mask); | |
1415 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, | |
1416 | ipv4_key->ipv4_dst, is_mask); | |
1417 | attrs &= ~(1ULL << OVS_KEY_ATTR_IPV4); | |
34118cae BP |
1418 | } |
1419 | ||
a1c564be AZ |
1420 | if (attrs & (1ULL << OVS_KEY_ATTR_IPV6)) { |
1421 | const struct ovs_key_ipv6 *ipv6_key; | |
685a51a5 | 1422 | |
a1c564be | 1423 | ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]); |
1b936472 AZ |
1424 | if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) { |
1425 | OVS_NLERR("Unknown IPv6 fragment type (value=%d, max=%d).\n", | |
1426 | ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX); | |
34118cae | 1427 | return -EINVAL; |
1b936472 | 1428 | } |
a1c564be AZ |
1429 | SW_FLOW_KEY_PUT(match, ipv6.label, |
1430 | ipv6_key->ipv6_label, is_mask); | |
1431 | SW_FLOW_KEY_PUT(match, ip.proto, | |
1432 | ipv6_key->ipv6_proto, is_mask); | |
1433 | SW_FLOW_KEY_PUT(match, ip.tos, | |
1434 | ipv6_key->ipv6_tclass, is_mask); | |
1435 | SW_FLOW_KEY_PUT(match, ip.ttl, | |
1436 | ipv6_key->ipv6_hlimit, is_mask); | |
1437 | SW_FLOW_KEY_PUT(match, ip.frag, | |
1438 | ipv6_key->ipv6_frag, is_mask); | |
1439 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src, | |
1440 | ipv6_key->ipv6_src, | |
1441 | sizeof(match->key->ipv6.addr.src), | |
1442 | is_mask); | |
1443 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst, | |
1444 | ipv6_key->ipv6_dst, | |
1445 | sizeof(match->key->ipv6.addr.dst), | |
1446 | is_mask); | |
1447 | ||
1448 | attrs &= ~(1ULL << OVS_KEY_ATTR_IPV6); | |
1449 | } | |
34118cae | 1450 | |
a1c564be AZ |
1451 | if (attrs & (1ULL << OVS_KEY_ATTR_ARP)) { |
1452 | const struct ovs_key_arp *arp_key; | |
1453 | ||
1454 | arp_key = nla_data(a[OVS_KEY_ATTR_ARP]); | |
1b936472 AZ |
1455 | if (!is_mask && (arp_key->arp_op & htons(0xff00))) { |
1456 | OVS_NLERR("Unknown ARP opcode (opcode=%d).\n", | |
1457 | arp_key->arp_op); | |
34118cae | 1458 | return -EINVAL; |
1b936472 | 1459 | } |
a1c564be AZ |
1460 | |
1461 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, | |
1462 | arp_key->arp_sip, is_mask); | |
1463 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, | |
1464 | arp_key->arp_tip, is_mask); | |
1465 | SW_FLOW_KEY_PUT(match, ip.proto, | |
1466 | ntohs(arp_key->arp_op), is_mask); | |
1467 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha, | |
1468 | arp_key->arp_sha, ETH_ALEN, is_mask); | |
1469 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha, | |
1470 | arp_key->arp_tha, ETH_ALEN, is_mask); | |
1471 | ||
1472 | attrs &= ~(1ULL << OVS_KEY_ATTR_ARP); | |
1473 | } | |
1474 | ||
1475 | if (attrs & (1ULL << OVS_KEY_ATTR_TCP)) { | |
1476 | const struct ovs_key_tcp *tcp_key; | |
1477 | ||
1478 | tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]); | |
828f5f64 JP |
1479 | if (orig_attrs & (1ULL << OVS_KEY_ATTR_IPV4)) { |
1480 | SW_FLOW_KEY_PUT(match, ipv4.tp.src, | |
1481 | tcp_key->tcp_src, is_mask); | |
1482 | SW_FLOW_KEY_PUT(match, ipv4.tp.dst, | |
1483 | tcp_key->tcp_dst, is_mask); | |
1484 | } else { | |
1485 | SW_FLOW_KEY_PUT(match, ipv6.tp.src, | |
1486 | tcp_key->tcp_src, is_mask); | |
1487 | SW_FLOW_KEY_PUT(match, ipv6.tp.dst, | |
1488 | tcp_key->tcp_dst, is_mask); | |
1489 | } | |
a1c564be AZ |
1490 | attrs &= ~(1ULL << OVS_KEY_ATTR_TCP); |
1491 | } | |
1492 | ||
1493 | if (attrs & (1ULL << OVS_KEY_ATTR_UDP)) { | |
1494 | const struct ovs_key_udp *udp_key; | |
1495 | ||
1496 | udp_key = nla_data(a[OVS_KEY_ATTR_UDP]); | |
828f5f64 JP |
1497 | if (orig_attrs & (1ULL << OVS_KEY_ATTR_IPV4)) { |
1498 | SW_FLOW_KEY_PUT(match, ipv4.tp.src, | |
1499 | udp_key->udp_src, is_mask); | |
1500 | SW_FLOW_KEY_PUT(match, ipv4.tp.dst, | |
1501 | udp_key->udp_dst, is_mask); | |
1502 | } else { | |
1503 | SW_FLOW_KEY_PUT(match, ipv6.tp.src, | |
1504 | udp_key->udp_src, is_mask); | |
1505 | SW_FLOW_KEY_PUT(match, ipv6.tp.dst, | |
1506 | udp_key->udp_dst, is_mask); | |
1507 | } | |
a1c564be AZ |
1508 | attrs &= ~(1ULL << OVS_KEY_ATTR_UDP); |
1509 | } | |
1510 | ||
1511 | if (attrs & (1ULL << OVS_KEY_ATTR_ICMP)) { | |
1512 | const struct ovs_key_icmp *icmp_key; | |
1513 | ||
1514 | icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]); | |
1515 | SW_FLOW_KEY_PUT(match, ipv4.tp.src, | |
1516 | htons(icmp_key->icmp_type), is_mask); | |
1517 | SW_FLOW_KEY_PUT(match, ipv4.tp.dst, | |
1518 | htons(icmp_key->icmp_code), is_mask); | |
1519 | attrs &= ~(1ULL << OVS_KEY_ATTR_ICMP); | |
1520 | } | |
1521 | ||
1522 | if (attrs & (1ULL << OVS_KEY_ATTR_ICMPV6)) { | |
1523 | const struct ovs_key_icmpv6 *icmpv6_key; | |
1524 | ||
1525 | icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]); | |
1526 | SW_FLOW_KEY_PUT(match, ipv6.tp.src, | |
1527 | htons(icmpv6_key->icmpv6_type), is_mask); | |
1528 | SW_FLOW_KEY_PUT(match, ipv6.tp.dst, | |
1529 | htons(icmpv6_key->icmpv6_code), is_mask); | |
1530 | attrs &= ~(1ULL << OVS_KEY_ATTR_ICMPV6); | |
1531 | } | |
1532 | ||
1533 | if (attrs & (1ULL << OVS_KEY_ATTR_ND)) { | |
1534 | const struct ovs_key_nd *nd_key; | |
1535 | ||
1536 | nd_key = nla_data(a[OVS_KEY_ATTR_ND]); | |
1537 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target, | |
1538 | nd_key->nd_target, | |
1539 | sizeof(match->key->ipv6.nd.target), | |
1540 | is_mask); | |
1541 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll, | |
1542 | nd_key->nd_sll, ETH_ALEN, is_mask); | |
1543 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll, | |
1544 | nd_key->nd_tll, ETH_ALEN, is_mask); | |
1545 | attrs &= ~(1ULL << OVS_KEY_ATTR_ND); | |
1546 | } | |
1547 | ||
1548 | if (attrs != 0) | |
1549 | return -EINVAL; | |
1550 | ||
1551 | return 0; | |
1552 | } | |
1553 | ||
1554 | /** | |
1555 | * ovs_match_from_nlattrs - parses Netlink attributes into a flow key and | |
1556 | * mask. In case the 'mask' is NULL, the flow is treated as exact match | |
1557 | * flow. Otherwise, it is treated as a wildcarded flow, except the mask | |
1558 | * does not include any don't care bit. | |
1559 | * @match: receives the extracted flow match information. | |
1560 | * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute | |
1561 | * sequence. The fields should of the packet that triggered the creation | |
1562 | * of this flow. | |
1563 | * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink | |
1564 | * attribute specifies the mask field of the wildcarded flow. | |
1565 | */ | |
1566 | int ovs_match_from_nlattrs(struct sw_flow_match *match, | |
1567 | const struct nlattr *key, | |
1568 | const struct nlattr *mask) | |
1569 | { | |
1570 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; | |
a1c564be AZ |
1571 | const struct nlattr *encap; |
1572 | u64 key_attrs = 0; | |
1573 | u64 mask_attrs = 0; | |
1574 | bool encap_valid = false; | |
1575 | int err; | |
1576 | ||
1577 | err = parse_flow_nlattrs(key, a, &key_attrs); | |
1578 | if (err) | |
1579 | return err; | |
1580 | ||
1581 | if (key_attrs & 1ULL << OVS_KEY_ATTR_ENCAP) { | |
1582 | encap = a[OVS_KEY_ATTR_ENCAP]; | |
1583 | key_attrs &= ~(1ULL << OVS_KEY_ATTR_ENCAP); | |
1584 | if (nla_len(encap)) { | |
1585 | __be16 eth_type = 0; /* ETH_P_8021Q */ | |
1586 | ||
1587 | if (a[OVS_KEY_ATTR_ETHERTYPE]) | |
1588 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
1589 | ||
1590 | if ((eth_type == htons(ETH_P_8021Q)) && (a[OVS_KEY_ATTR_VLAN])) { | |
1591 | encap_valid = true; | |
1592 | key_attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE); | |
1593 | err = parse_flow_nlattrs(encap, a, &key_attrs); | |
1b936472 AZ |
1594 | } else { |
1595 | OVS_NLERR("Encap attribute is set for a non-VLAN frame.\n"); | |
a1c564be | 1596 | err = -EINVAL; |
1b936472 | 1597 | } |
a1c564be | 1598 | |
34118cae BP |
1599 | if (err) |
1600 | return err; | |
36956a7d | 1601 | } |
a1c564be | 1602 | } |
36956a7d | 1603 | |
a1c564be AZ |
1604 | err = ovs_key_from_nlattrs(match, key_attrs, a, false); |
1605 | if (err) | |
1606 | return err; | |
1607 | ||
1608 | if (mask) { | |
1a02b768 | 1609 | err = parse_flow_mask_nlattrs(mask, a, &mask_attrs); |
a1c564be AZ |
1610 | if (err) |
1611 | return err; | |
1612 | ||
1613 | if ((mask_attrs & 1ULL << OVS_KEY_ATTR_ENCAP) && encap_valid) { | |
1614 | __be16 eth_type = 0; | |
1615 | ||
063236f1 | 1616 | mask_attrs &= ~(1ULL << OVS_KEY_ATTR_ENCAP); |
1a02b768 JG |
1617 | if (a[OVS_KEY_ATTR_ETHERTYPE]) |
1618 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
a1c564be AZ |
1619 | if (eth_type == htons(0xffff)) { |
1620 | mask_attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE); | |
1a02b768 JG |
1621 | encap = a[OVS_KEY_ATTR_ENCAP]; |
1622 | err = parse_flow_mask_nlattrs(encap, a, &mask_attrs); | |
1b936472 AZ |
1623 | } else { |
1624 | OVS_NLERR("VLAN frames must have an exact match" | |
1625 | " on the TPID (mask=%x).\n", | |
1626 | ntohs(eth_type)); | |
a1c564be | 1627 | err = -EINVAL; |
1b936472 | 1628 | } |
34118cae | 1629 | |
34118cae BP |
1630 | if (err) |
1631 | return err; | |
1632 | } | |
36956a7d | 1633 | |
1a02b768 | 1634 | err = ovs_key_from_nlattrs(match, mask_attrs, a, true); |
a1c564be AZ |
1635 | if (err) |
1636 | return err; | |
1637 | } else { | |
1638 | /* Populate exact match flow's key mask. */ | |
1639 | if (match->mask) | |
1640 | ovs_sw_flow_mask_set(match->mask, &match->range, 0xff); | |
34118cae | 1641 | } |
76abe283 | 1642 | |
a1c564be | 1643 | if (!ovs_match_validate(match, key_attrs, mask_attrs)) |
34118cae | 1644 | return -EINVAL; |
34118cae BP |
1645 | |
1646 | return 0; | |
36956a7d BP |
1647 | } |
1648 | ||
80e5eed9 | 1649 | /** |
850b6b3b | 1650 | * ovs_flow_metadata_from_nlattrs - parses Netlink attributes into a flow key. |
c3b36027 | 1651 | * @flow: Receives extracted in_port, priority, tun_key and skb_mark. |
c3b36027 | 1652 | * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute |
80e5eed9 BP |
1653 | * sequence. |
1654 | * | |
1655 | * This parses a series of Netlink attributes that form a flow key, which must | |
1656 | * take the same form accepted by flow_from_nlattrs(), but only enough of it to | |
1657 | * get the metadata, that is, the parts of the flow key that cannot be | |
1658 | * extracted from the packet itself. | |
1659 | */ | |
13e24889 | 1660 | |
a1c564be AZ |
1661 | int ovs_flow_metadata_from_nlattrs(struct sw_flow *flow, |
1662 | const struct nlattr *attr) | |
80e5eed9 | 1663 | { |
6694e498 | 1664 | struct ovs_key_ipv4_tunnel *tun_key = &flow->key.tun_key; |
a1c564be AZ |
1665 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; |
1666 | u64 attrs = 0; | |
1667 | int err; | |
1668 | struct sw_flow_match match; | |
80e5eed9 | 1669 | |
13e24889 PS |
1670 | flow->key.phy.in_port = DP_MAX_PORTS; |
1671 | flow->key.phy.priority = 0; | |
72e8bf28 | 1672 | flow->key.phy.skb_mark = 0; |
6694e498 | 1673 | memset(tun_key, 0, sizeof(flow->key.tun_key)); |
80e5eed9 | 1674 | |
a1c564be AZ |
1675 | err = parse_flow_nlattrs(attr, a, &attrs); |
1676 | if (err) | |
80e5eed9 | 1677 | return -EINVAL; |
13e24889 | 1678 | |
46d4c97f JG |
1679 | memset(&match, 0, sizeof(match)); |
1680 | match.key = &flow->key; | |
a1c564be AZ |
1681 | |
1682 | err = metadata_from_nlattrs(&match, &attrs, a, false); | |
1683 | if (err) | |
1684 | return err; | |
13e24889 | 1685 | |
80e5eed9 BP |
1686 | return 0; |
1687 | } | |
1688 | ||
a1c564be AZ |
1689 | int ovs_flow_to_nlattrs(const struct sw_flow_key *swkey, |
1690 | const struct sw_flow_key *output, struct sk_buff *skb) | |
36956a7d | 1691 | { |
df2c07f4 | 1692 | struct ovs_key_ethernet *eth_key; |
fea393b1 | 1693 | struct nlattr *nla, *encap; |
36956a7d | 1694 | |
c3cc8c03 | 1695 | if (swkey->phy.priority && |
a1c564be | 1696 | nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority)) |
c3cc8c03 | 1697 | goto nla_put_failure; |
18c43631 | 1698 | |
9b405f1a | 1699 | if (swkey->tun_key.ipv4_dst && |
a1c564be | 1700 | ipv4_tun_to_nlattr(skb, &swkey->tun_key, &output->tun_key)) |
9b405f1a PS |
1701 | goto nla_put_failure; |
1702 | ||
a1c564be AZ |
1703 | if (swkey->phy.in_port != DP_MAX_PORTS) { |
1704 | /* Exact match upper 16 bits. */ | |
1705 | u16 upper_u16; | |
1706 | upper_u16 = (swkey == output) ? 0 : 0xffff; | |
1707 | ||
1708 | if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, | |
1709 | (upper_u16 << 16) | output->phy.in_port)) | |
1710 | goto nla_put_failure; | |
1711 | } | |
36956a7d | 1712 | |
72e8bf28 | 1713 | if (swkey->phy.skb_mark && |
a1c564be | 1714 | nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark)) |
72e8bf28 AA |
1715 | goto nla_put_failure; |
1716 | ||
df2c07f4 | 1717 | nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key)); |
d6569377 BP |
1718 | if (!nla) |
1719 | goto nla_put_failure; | |
a1c564be | 1720 | |
d6569377 | 1721 | eth_key = nla_data(nla); |
a1c564be AZ |
1722 | memcpy(eth_key->eth_src, output->eth.src, ETH_ALEN); |
1723 | memcpy(eth_key->eth_dst, output->eth.dst, ETH_ALEN); | |
36956a7d | 1724 | |
8ddc056d | 1725 | if (swkey->eth.tci || swkey->eth.type == htons(ETH_P_8021Q)) { |
a1c564be AZ |
1726 | __be16 eth_type; |
1727 | eth_type = (swkey == output) ? htons(ETH_P_8021Q) : htons(0xffff) ; | |
1728 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) || | |
1729 | nla_put_be16(skb, OVS_KEY_ATTR_VLAN, output->eth.tci)) | |
c3cc8c03 | 1730 | goto nla_put_failure; |
fea393b1 | 1731 | encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP); |
8ddc056d BP |
1732 | if (!swkey->eth.tci) |
1733 | goto unencap; | |
a1c564be | 1734 | } else |
fea393b1 | 1735 | encap = NULL; |
36956a7d | 1736 | |
a1c564be | 1737 | if ((swkey == output) && (swkey->eth.type == htons(ETH_P_802_2))) |
fea393b1 | 1738 | goto unencap; |
36956a7d | 1739 | |
a1c564be AZ |
1740 | if (output->eth.type != 0) |
1741 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type)) | |
1742 | goto nla_put_failure; | |
36956a7d | 1743 | |
76abe283 | 1744 | if (swkey->eth.type == htons(ETH_P_IP)) { |
df2c07f4 | 1745 | struct ovs_key_ipv4 *ipv4_key; |
36956a7d | 1746 | |
df2c07f4 | 1747 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key)); |
d6569377 BP |
1748 | if (!nla) |
1749 | goto nla_put_failure; | |
1750 | ipv4_key = nla_data(nla); | |
a1c564be AZ |
1751 | ipv4_key->ipv4_src = output->ipv4.addr.src; |
1752 | ipv4_key->ipv4_dst = output->ipv4.addr.dst; | |
1753 | ipv4_key->ipv4_proto = output->ip.proto; | |
1754 | ipv4_key->ipv4_tos = output->ip.tos; | |
1755 | ipv4_key->ipv4_ttl = output->ip.ttl; | |
1756 | ipv4_key->ipv4_frag = output->ip.frag; | |
76abe283 | 1757 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { |
df2c07f4 | 1758 | struct ovs_key_ipv6 *ipv6_key; |
d31f1109 | 1759 | |
df2c07f4 | 1760 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key)); |
d31f1109 JP |
1761 | if (!nla) |
1762 | goto nla_put_failure; | |
1763 | ipv6_key = nla_data(nla); | |
a1c564be | 1764 | memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src, |
d31f1109 | 1765 | sizeof(ipv6_key->ipv6_src)); |
a1c564be | 1766 | memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst, |
d31f1109 | 1767 | sizeof(ipv6_key->ipv6_dst)); |
a1c564be AZ |
1768 | ipv6_key->ipv6_label = output->ipv6.label; |
1769 | ipv6_key->ipv6_proto = output->ip.proto; | |
1770 | ipv6_key->ipv6_tclass = output->ip.tos; | |
1771 | ipv6_key->ipv6_hlimit = output->ip.ttl; | |
1772 | ipv6_key->ipv6_frag = output->ip.frag; | |
8087f5ff MM |
1773 | } else if (swkey->eth.type == htons(ETH_P_ARP) || |
1774 | swkey->eth.type == htons(ETH_P_RARP)) { | |
df2c07f4 | 1775 | struct ovs_key_arp *arp_key; |
d31f1109 | 1776 | |
df2c07f4 | 1777 | nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key)); |
d31f1109 JP |
1778 | if (!nla) |
1779 | goto nla_put_failure; | |
1780 | arp_key = nla_data(nla); | |
df2c07f4 | 1781 | memset(arp_key, 0, sizeof(struct ovs_key_arp)); |
a1c564be AZ |
1782 | arp_key->arp_sip = output->ipv4.addr.src; |
1783 | arp_key->arp_tip = output->ipv4.addr.dst; | |
1784 | arp_key->arp_op = htons(output->ip.proto); | |
1785 | memcpy(arp_key->arp_sha, output->ipv4.arp.sha, ETH_ALEN); | |
1786 | memcpy(arp_key->arp_tha, output->ipv4.arp.tha, ETH_ALEN); | |
d31f1109 JP |
1787 | } |
1788 | ||
7257b535 BP |
1789 | if ((swkey->eth.type == htons(ETH_P_IP) || |
1790 | swkey->eth.type == htons(ETH_P_IPV6)) && | |
9e44d715 | 1791 | swkey->ip.frag != OVS_FRAG_TYPE_LATER) { |
36956a7d | 1792 | |
28bad473 | 1793 | if (swkey->ip.proto == IPPROTO_TCP) { |
df2c07f4 | 1794 | struct ovs_key_tcp *tcp_key; |
36956a7d | 1795 | |
df2c07f4 | 1796 | nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key)); |
d6569377 BP |
1797 | if (!nla) |
1798 | goto nla_put_failure; | |
1799 | tcp_key = nla_data(nla); | |
76abe283 | 1800 | if (swkey->eth.type == htons(ETH_P_IP)) { |
a1c564be AZ |
1801 | tcp_key->tcp_src = output->ipv4.tp.src; |
1802 | tcp_key->tcp_dst = output->ipv4.tp.dst; | |
76abe283 | 1803 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { |
a1c564be AZ |
1804 | tcp_key->tcp_src = output->ipv6.tp.src; |
1805 | tcp_key->tcp_dst = output->ipv6.tp.dst; | |
76abe283 | 1806 | } |
28bad473 | 1807 | } else if (swkey->ip.proto == IPPROTO_UDP) { |
df2c07f4 | 1808 | struct ovs_key_udp *udp_key; |
36956a7d | 1809 | |
df2c07f4 | 1810 | nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key)); |
d6569377 BP |
1811 | if (!nla) |
1812 | goto nla_put_failure; | |
1813 | udp_key = nla_data(nla); | |
76abe283 | 1814 | if (swkey->eth.type == htons(ETH_P_IP)) { |
a1c564be AZ |
1815 | udp_key->udp_src = output->ipv4.tp.src; |
1816 | udp_key->udp_dst = output->ipv4.tp.dst; | |
76abe283 | 1817 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { |
a1c564be AZ |
1818 | udp_key->udp_src = output->ipv6.tp.src; |
1819 | udp_key->udp_dst = output->ipv6.tp.dst; | |
76abe283 AE |
1820 | } |
1821 | } else if (swkey->eth.type == htons(ETH_P_IP) && | |
28bad473 | 1822 | swkey->ip.proto == IPPROTO_ICMP) { |
df2c07f4 | 1823 | struct ovs_key_icmp *icmp_key; |
36956a7d | 1824 | |
df2c07f4 | 1825 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key)); |
d6569377 BP |
1826 | if (!nla) |
1827 | goto nla_put_failure; | |
1828 | icmp_key = nla_data(nla); | |
a1c564be AZ |
1829 | icmp_key->icmp_type = ntohs(output->ipv4.tp.src); |
1830 | icmp_key->icmp_code = ntohs(output->ipv4.tp.dst); | |
76abe283 | 1831 | } else if (swkey->eth.type == htons(ETH_P_IPV6) && |
28bad473 | 1832 | swkey->ip.proto == IPPROTO_ICMPV6) { |
df2c07f4 | 1833 | struct ovs_key_icmpv6 *icmpv6_key; |
36956a7d | 1834 | |
df2c07f4 | 1835 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6, |
bfef4717 | 1836 | sizeof(*icmpv6_key)); |
d31f1109 JP |
1837 | if (!nla) |
1838 | goto nla_put_failure; | |
1839 | icmpv6_key = nla_data(nla); | |
a1c564be AZ |
1840 | icmpv6_key->icmpv6_type = ntohs(output->ipv6.tp.src); |
1841 | icmpv6_key->icmpv6_code = ntohs(output->ipv6.tp.dst); | |
685a51a5 | 1842 | |
bfef4717 JG |
1843 | if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION || |
1844 | icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) { | |
df2c07f4 | 1845 | struct ovs_key_nd *nd_key; |
685a51a5 | 1846 | |
df2c07f4 | 1847 | nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key)); |
685a51a5 JP |
1848 | if (!nla) |
1849 | goto nla_put_failure; | |
1850 | nd_key = nla_data(nla); | |
a1c564be | 1851 | memcpy(nd_key->nd_target, &output->ipv6.nd.target, |
685a51a5 | 1852 | sizeof(nd_key->nd_target)); |
a1c564be AZ |
1853 | memcpy(nd_key->nd_sll, output->ipv6.nd.sll, ETH_ALEN); |
1854 | memcpy(nd_key->nd_tll, output->ipv6.nd.tll, ETH_ALEN); | |
685a51a5 | 1855 | } |
d31f1109 | 1856 | } |
36956a7d BP |
1857 | } |
1858 | ||
fea393b1 BP |
1859 | unencap: |
1860 | if (encap) | |
1861 | nla_nest_end(skb, encap); | |
1862 | ||
d6569377 | 1863 | return 0; |
36956a7d | 1864 | |
d6569377 BP |
1865 | nla_put_failure: |
1866 | return -EMSGSIZE; | |
8d5ebd83 JG |
1867 | } |
1868 | ||
064af421 BP |
1869 | /* Initializes the flow module. |
1870 | * Returns zero if successful or a negative error code. */ | |
850b6b3b | 1871 | int ovs_flow_init(void) |
064af421 BP |
1872 | { |
1873 | flow_cache = kmem_cache_create("sw_flow", sizeof(struct sw_flow), 0, | |
1874 | 0, NULL); | |
1875 | if (flow_cache == NULL) | |
1876 | return -ENOMEM; | |
1877 | ||
1878 | return 0; | |
1879 | } | |
1880 | ||
1881 | /* Uninitializes the flow module. */ | |
850b6b3b | 1882 | void ovs_flow_exit(void) |
064af421 BP |
1883 | { |
1884 | kmem_cache_destroy(flow_cache); | |
1885 | } | |
a1c564be AZ |
1886 | |
1887 | struct sw_flow_mask *ovs_sw_flow_mask_alloc(void) | |
1888 | { | |
1889 | struct sw_flow_mask *mask; | |
1890 | ||
1891 | mask = kmalloc(sizeof(*mask), GFP_KERNEL); | |
1892 | if (mask) | |
1893 | mask->ref_count = 0; | |
1894 | ||
1895 | return mask; | |
1896 | } | |
1897 | ||
1898 | void ovs_sw_flow_mask_add_ref(struct sw_flow_mask *mask) | |
1899 | { | |
1900 | mask->ref_count++; | |
1901 | } | |
1902 | ||
1903 | static void rcu_free_sw_flow_mask_cb(struct rcu_head *rcu) | |
1904 | { | |
1905 | struct sw_flow_mask *mask = container_of(rcu, struct sw_flow_mask, rcu); | |
1906 | ||
1907 | kfree(mask); | |
1908 | } | |
1909 | ||
1910 | void ovs_sw_flow_mask_del_ref(struct sw_flow_mask *mask, bool deferred) | |
1911 | { | |
1912 | if (!mask) | |
1913 | return; | |
1914 | ||
1915 | BUG_ON(!mask->ref_count); | |
1916 | mask->ref_count--; | |
1917 | ||
1918 | if (!mask->ref_count) { | |
1919 | list_del_rcu(&mask->list); | |
1920 | if (deferred) | |
1921 | call_rcu(&mask->rcu, rcu_free_sw_flow_mask_cb); | |
1922 | else | |
1923 | kfree(mask); | |
1924 | } | |
1925 | } | |
1926 | ||
1927 | static bool ovs_sw_flow_mask_equal(const struct sw_flow_mask *a, | |
1928 | const struct sw_flow_mask *b) | |
1929 | { | |
1930 | u8 *a_ = (u8 *)&a->key + a->range.start; | |
1931 | u8 *b_ = (u8 *)&b->key + b->range.start; | |
1932 | ||
1933 | return (a->range.end == b->range.end) | |
1934 | && (a->range.start == b->range.start) | |
1935 | && (memcmp(a_, b_, ovs_sw_flow_mask_actual_size(a)) == 0); | |
1936 | } | |
1937 | ||
1938 | struct sw_flow_mask *ovs_sw_flow_mask_find(const struct flow_table *tbl, | |
1939 | const struct sw_flow_mask *mask) | |
1940 | { | |
1941 | struct list_head *ml; | |
1942 | ||
ede77a46 | 1943 | list_for_each(ml, tbl->mask_list) { |
a1c564be AZ |
1944 | struct sw_flow_mask *m; |
1945 | m = container_of(ml, struct sw_flow_mask, list); | |
1946 | if (ovs_sw_flow_mask_equal(mask, m)) | |
1947 | return m; | |
1948 | } | |
1949 | ||
1950 | return NULL; | |
1951 | } | |
1952 | ||
1953 | /** | |
1954 | * add a new mask into the mask list. | |
1955 | * The caller needs to make sure that 'mask' is not the same | |
1956 | * as any masks that are already on the list. | |
1957 | */ | |
1958 | void ovs_sw_flow_mask_insert(struct flow_table *tbl, struct sw_flow_mask *mask) | |
1959 | { | |
ede77a46 | 1960 | list_add_rcu(&mask->list, tbl->mask_list); |
a1c564be AZ |
1961 | } |
1962 | ||
1963 | /** | |
1964 | * Set 'range' fields in the mask to the value of 'val'. | |
1965 | */ | |
1966 | static void ovs_sw_flow_mask_set(struct sw_flow_mask *mask, | |
1967 | struct sw_flow_key_range *range, u8 val) | |
1968 | { | |
1969 | u8 *m = (u8 *)&mask->key + range->start; | |
1970 | ||
1971 | mask->range = *range; | |
1972 | memset(m, val, ovs_sw_flow_mask_size_roundup(mask)); | |
1973 | } |