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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> |
10f72e3d | 37 | #include <linux/sctp.h> |
064af421 BP |
38 | #include <linux/tcp.h> |
39 | #include <linux/udp.h> | |
40 | #include <linux/icmp.h> | |
d31f1109 | 41 | #include <linux/icmpv6.h> |
3544358a | 42 | #include <linux/rculist.h> |
064af421 | 43 | #include <net/ip.h> |
d31f1109 | 44 | #include <net/ipv6.h> |
685a51a5 | 45 | #include <net/ndisc.h> |
064af421 | 46 | |
6ce39213 JG |
47 | #include "vlan.h" |
48 | ||
33b38b63 | 49 | static struct kmem_cache *flow_cache; |
064af421 | 50 | |
a1c564be AZ |
51 | static void ovs_sw_flow_mask_set(struct sw_flow_mask *mask, |
52 | struct sw_flow_key_range *range, u8 val); | |
53 | ||
54 | static void update_range__(struct sw_flow_match *match, | |
55 | size_t offset, size_t size, bool is_mask) | |
56 | { | |
57 | struct sw_flow_key_range *range = NULL; | |
58 | size_t start = offset; | |
59 | size_t end = offset + size; | |
60 | ||
61 | if (!is_mask) | |
62 | range = &match->range; | |
63 | else if (match->mask) | |
64 | range = &match->mask->range; | |
65 | ||
66 | if (!range) | |
67 | return; | |
68 | ||
69 | if (range->start == range->end) { | |
70 | range->start = start; | |
71 | range->end = end; | |
72 | return; | |
73 | } | |
74 | ||
75 | if (range->start > start) | |
76 | range->start = start; | |
77 | ||
78 | if (range->end < end) | |
79 | range->end = end; | |
80 | } | |
81 | ||
82 | #define SW_FLOW_KEY_PUT(match, field, value, is_mask) \ | |
83 | do { \ | |
84 | update_range__(match, offsetof(struct sw_flow_key, field), \ | |
85 | sizeof((match)->key->field), is_mask); \ | |
388c13d8 AZ |
86 | if (is_mask) { \ |
87 | if ((match)->mask) \ | |
88 | (match)->mask->key.field = value; \ | |
a1c564be AZ |
89 | } else { \ |
90 | (match)->key->field = value; \ | |
91 | } \ | |
92 | } while (0) | |
93 | ||
94 | #define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \ | |
95 | do { \ | |
96 | update_range__(match, offsetof(struct sw_flow_key, field), \ | |
97 | len, is_mask); \ | |
388c13d8 AZ |
98 | if (is_mask) { \ |
99 | if ((match)->mask) \ | |
100 | memcpy(&(match)->mask->key.field, value_p, len);\ | |
a1c564be AZ |
101 | } else { \ |
102 | memcpy(&(match)->key->field, value_p, len); \ | |
103 | } \ | |
104 | } while (0) | |
105 | ||
106 | void ovs_match_init(struct sw_flow_match *match, | |
107 | struct sw_flow_key *key, | |
108 | struct sw_flow_mask *mask) | |
109 | { | |
110 | memset(match, 0, sizeof(*match)); | |
111 | match->key = key; | |
112 | match->mask = mask; | |
113 | ||
114 | memset(key, 0, sizeof(*key)); | |
115 | ||
116 | if (mask) { | |
117 | memset(&mask->key, 0, sizeof(mask->key)); | |
118 | mask->range.start = mask->range.end = 0; | |
119 | } | |
120 | } | |
121 | ||
122 | static bool ovs_match_validate(const struct sw_flow_match *match, | |
123 | u64 key_attrs, u64 mask_attrs) | |
124 | { | |
125 | u64 key_expected = 1ULL << OVS_KEY_ATTR_ETHERNET; | |
126 | u64 mask_allowed = key_attrs; /* At most allow all key attributes */ | |
127 | ||
128 | /* The following mask attributes allowed only if they | |
129 | * pass the validation tests. */ | |
130 | mask_allowed &= ~((1ULL << OVS_KEY_ATTR_IPV4) | |
131 | | (1ULL << OVS_KEY_ATTR_IPV6) | |
132 | | (1ULL << OVS_KEY_ATTR_TCP) | |
133 | | (1ULL << OVS_KEY_ATTR_UDP) | |
10f72e3d | 134 | | (1ULL << OVS_KEY_ATTR_SCTP) |
a1c564be AZ |
135 | | (1ULL << OVS_KEY_ATTR_ICMP) |
136 | | (1ULL << OVS_KEY_ATTR_ICMPV6) | |
137 | | (1ULL << OVS_KEY_ATTR_ARP) | |
138 | | (1ULL << OVS_KEY_ATTR_ND)); | |
139 | ||
202c1051 AZ |
140 | /* Always allowed mask fields. */ |
141 | mask_allowed |= ((1ULL << OVS_KEY_ATTR_TUNNEL) | |
33fd9f59 | 142 | | (1ULL << OVS_KEY_ATTR_IN_PORT) |
6273244a | 143 | | (1ULL << OVS_KEY_ATTR_ETHERTYPE)); |
a1c564be AZ |
144 | |
145 | /* Check key attributes. */ | |
146 | if (match->key->eth.type == htons(ETH_P_ARP) | |
147 | || match->key->eth.type == htons(ETH_P_RARP)) { | |
148 | key_expected |= 1ULL << OVS_KEY_ATTR_ARP; | |
149 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
150 | mask_allowed |= 1ULL << OVS_KEY_ATTR_ARP; | |
151 | } | |
152 | ||
153 | if (match->key->eth.type == htons(ETH_P_IP)) { | |
154 | key_expected |= 1ULL << OVS_KEY_ATTR_IPV4; | |
155 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
156 | mask_allowed |= 1ULL << OVS_KEY_ATTR_IPV4; | |
157 | ||
158 | if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { | |
159 | if (match->key->ip.proto == IPPROTO_UDP) { | |
160 | key_expected |= 1ULL << OVS_KEY_ATTR_UDP; | |
161 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
162 | mask_allowed |= 1ULL << OVS_KEY_ATTR_UDP; | |
163 | } | |
164 | ||
10f72e3d JS |
165 | if (match->key->ip.proto == IPPROTO_SCTP) { |
166 | key_expected |= 1ULL << OVS_KEY_ATTR_SCTP; | |
167 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
168 | mask_allowed |= 1ULL << OVS_KEY_ATTR_SCTP; | |
169 | } | |
170 | ||
a1c564be AZ |
171 | if (match->key->ip.proto == IPPROTO_TCP) { |
172 | key_expected |= 1ULL << OVS_KEY_ATTR_TCP; | |
173 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
174 | mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP; | |
175 | } | |
176 | ||
177 | if (match->key->ip.proto == IPPROTO_ICMP) { | |
178 | key_expected |= 1ULL << OVS_KEY_ATTR_ICMP; | |
179 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
180 | mask_allowed |= 1ULL << OVS_KEY_ATTR_ICMP; | |
181 | } | |
182 | } | |
183 | } | |
184 | ||
185 | if (match->key->eth.type == htons(ETH_P_IPV6)) { | |
186 | key_expected |= 1ULL << OVS_KEY_ATTR_IPV6; | |
187 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
188 | mask_allowed |= 1ULL << OVS_KEY_ATTR_IPV6; | |
189 | ||
190 | if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { | |
191 | if (match->key->ip.proto == IPPROTO_UDP) { | |
192 | key_expected |= 1ULL << OVS_KEY_ATTR_UDP; | |
193 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
194 | mask_allowed |= 1ULL << OVS_KEY_ATTR_UDP; | |
195 | } | |
196 | ||
10f72e3d JS |
197 | if (match->key->ip.proto == IPPROTO_SCTP) { |
198 | key_expected |= 1ULL << OVS_KEY_ATTR_SCTP; | |
199 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
200 | mask_allowed |= 1ULL << OVS_KEY_ATTR_SCTP; | |
201 | } | |
202 | ||
a1c564be AZ |
203 | if (match->key->ip.proto == IPPROTO_TCP) { |
204 | key_expected |= 1ULL << OVS_KEY_ATTR_TCP; | |
205 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
206 | mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP; | |
207 | } | |
208 | ||
209 | if (match->key->ip.proto == IPPROTO_ICMPV6) { | |
210 | key_expected |= 1ULL << OVS_KEY_ATTR_ICMPV6; | |
211 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
212 | mask_allowed |= 1ULL << OVS_KEY_ATTR_ICMPV6; | |
213 | ||
214 | if (match->key->ipv6.tp.src == | |
215 | htons(NDISC_NEIGHBOUR_SOLICITATION) || | |
216 | match->key->ipv6.tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) { | |
217 | key_expected |= 1ULL << OVS_KEY_ATTR_ND; | |
218 | if (match->mask && (match->mask->key.ipv6.tp.src == htons(0xffff))) | |
219 | mask_allowed |= 1ULL << OVS_KEY_ATTR_ND; | |
220 | } | |
221 | } | |
222 | } | |
223 | } | |
224 | ||
1b936472 | 225 | if ((key_attrs & key_expected) != key_expected) { |
a1c564be | 226 | /* Key attributes check failed. */ |
1b936472 AZ |
227 | OVS_NLERR("Missing expected key attributes (key_attrs=%llx, expected=%llx).\n", |
228 | key_attrs, key_expected); | |
a1c564be | 229 | return false; |
1b936472 | 230 | } |
a1c564be | 231 | |
1b936472 | 232 | if ((mask_attrs & mask_allowed) != mask_attrs) { |
a1c564be | 233 | /* Mask attributes check failed. */ |
1b936472 AZ |
234 | OVS_NLERR("Contain more than allowed mask fields (mask_attrs=%llx, mask_allowed=%llx).\n", |
235 | mask_attrs, mask_allowed); | |
a1c564be | 236 | return false; |
1b936472 | 237 | } |
a1c564be AZ |
238 | |
239 | return true; | |
240 | } | |
241 | ||
2db65bf7 JG |
242 | static int check_header(struct sk_buff *skb, int len) |
243 | { | |
244 | if (unlikely(skb->len < len)) | |
245 | return -EINVAL; | |
246 | if (unlikely(!pskb_may_pull(skb, len))) | |
247 | return -ENOMEM; | |
248 | return 0; | |
249 | } | |
250 | ||
6455100f | 251 | static bool arphdr_ok(struct sk_buff *skb) |
a26ef517 | 252 | { |
2db65bf7 JG |
253 | return pskb_may_pull(skb, skb_network_offset(skb) + |
254 | sizeof(struct arp_eth_header)); | |
a26ef517 JP |
255 | } |
256 | ||
6455100f | 257 | static int check_iphdr(struct sk_buff *skb) |
064af421 | 258 | { |
4c1ad233 BP |
259 | unsigned int nh_ofs = skb_network_offset(skb); |
260 | unsigned int ip_len; | |
2db65bf7 | 261 | int err; |
4c1ad233 | 262 | |
2db65bf7 JG |
263 | err = check_header(skb, nh_ofs + sizeof(struct iphdr)); |
264 | if (unlikely(err)) | |
265 | return err; | |
4c1ad233 BP |
266 | |
267 | ip_len = ip_hdrlen(skb); | |
2db65bf7 JG |
268 | if (unlikely(ip_len < sizeof(struct iphdr) || |
269 | skb->len < nh_ofs + ip_len)) | |
4c1ad233 BP |
270 | return -EINVAL; |
271 | ||
4c1ad233 BP |
272 | skb_set_transport_header(skb, nh_ofs + ip_len); |
273 | return 0; | |
064af421 BP |
274 | } |
275 | ||
6455100f | 276 | static bool tcphdr_ok(struct sk_buff *skb) |
064af421 BP |
277 | { |
278 | int th_ofs = skb_transport_offset(skb); | |
2db65bf7 JG |
279 | int tcp_len; |
280 | ||
281 | if (unlikely(!pskb_may_pull(skb, th_ofs + sizeof(struct tcphdr)))) | |
282 | return false; | |
283 | ||
284 | tcp_len = tcp_hdrlen(skb); | |
285 | if (unlikely(tcp_len < sizeof(struct tcphdr) || | |
286 | skb->len < th_ofs + tcp_len)) | |
287 | return false; | |
288 | ||
289 | return true; | |
064af421 BP |
290 | } |
291 | ||
6455100f | 292 | static bool udphdr_ok(struct sk_buff *skb) |
064af421 | 293 | { |
2db65bf7 JG |
294 | return pskb_may_pull(skb, skb_transport_offset(skb) + |
295 | sizeof(struct udphdr)); | |
064af421 BP |
296 | } |
297 | ||
10f72e3d JS |
298 | static bool sctphdr_ok(struct sk_buff *skb) |
299 | { | |
300 | return pskb_may_pull(skb, skb_transport_offset(skb) + | |
301 | sizeof(struct sctphdr)); | |
302 | } | |
303 | ||
6455100f | 304 | static bool icmphdr_ok(struct sk_buff *skb) |
064af421 | 305 | { |
2db65bf7 JG |
306 | return pskb_may_pull(skb, skb_transport_offset(skb) + |
307 | sizeof(struct icmphdr)); | |
064af421 BP |
308 | } |
309 | ||
850b6b3b | 310 | u64 ovs_flow_used_time(unsigned long flow_jiffies) |
ec58547a JG |
311 | { |
312 | struct timespec cur_ts; | |
313 | u64 cur_ms, idle_ms; | |
314 | ||
315 | ktime_get_ts(&cur_ts); | |
316 | idle_ms = jiffies_to_msecs(jiffies - flow_jiffies); | |
317 | cur_ms = (u64)cur_ts.tv_sec * MSEC_PER_SEC + | |
318 | cur_ts.tv_nsec / NSEC_PER_MSEC; | |
319 | ||
320 | return cur_ms - idle_ms; | |
321 | } | |
322 | ||
a1c564be | 323 | static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key) |
d31f1109 JP |
324 | { |
325 | unsigned int nh_ofs = skb_network_offset(skb); | |
326 | unsigned int nh_len; | |
327 | int payload_ofs; | |
d31f1109 JP |
328 | struct ipv6hdr *nh; |
329 | uint8_t nexthdr; | |
0fd0d083 | 330 | __be16 frag_off; |
2db65bf7 | 331 | int err; |
d31f1109 | 332 | |
2db65bf7 JG |
333 | err = check_header(skb, nh_ofs + sizeof(*nh)); |
334 | if (unlikely(err)) | |
335 | return err; | |
d31f1109 JP |
336 | |
337 | nh = ipv6_hdr(skb); | |
338 | nexthdr = nh->nexthdr; | |
339 | payload_ofs = (u8 *)(nh + 1) - skb->data; | |
d31f1109 | 340 | |
28bad473 | 341 | key->ip.proto = NEXTHDR_NONE; |
530180fd | 342 | key->ip.tos = ipv6_get_dsfield(nh); |
a61680c6 | 343 | key->ip.ttl = nh->hop_limit; |
fa8223b7 | 344 | key->ipv6.label = *(__be32 *)nh & htonl(IPV6_FLOWINFO_FLOWLABEL); |
858d1026 JG |
345 | key->ipv6.addr.src = nh->saddr; |
346 | key->ipv6.addr.dst = nh->daddr; | |
d31f1109 | 347 | |
0fd0d083 | 348 | payload_ofs = ipv6_skip_exthdr(skb, payload_ofs, &nexthdr, &frag_off); |
bfef4717 | 349 | if (unlikely(payload_ofs < 0)) |
d31f1109 | 350 | return -EINVAL; |
bfef4717 | 351 | |
0fd0d083 JG |
352 | if (frag_off) { |
353 | if (frag_off & htons(~0x7)) | |
354 | key->ip.frag = OVS_FRAG_TYPE_LATER; | |
355 | else | |
356 | key->ip.frag = OVS_FRAG_TYPE_FIRST; | |
357 | } | |
358 | ||
d31f1109 | 359 | nh_len = payload_ofs - nh_ofs; |
d31f1109 | 360 | skb_set_transport_header(skb, nh_ofs + nh_len); |
28bad473 | 361 | key->ip.proto = nexthdr; |
d31f1109 JP |
362 | return nh_len; |
363 | } | |
364 | ||
365 | static bool icmp6hdr_ok(struct sk_buff *skb) | |
366 | { | |
2db65bf7 JG |
367 | return pskb_may_pull(skb, skb_transport_offset(skb) + |
368 | sizeof(struct icmp6hdr)); | |
d31f1109 | 369 | } |
ec58547a | 370 | |
529db635 JG |
371 | void ovs_flow_key_mask(struct sw_flow_key *dst, const struct sw_flow_key *src, |
372 | const struct sw_flow_mask *mask) | |
a1c564be AZ |
373 | { |
374 | u8 *m = (u8 *)&mask->key + mask->range.start; | |
375 | u8 *s = (u8 *)src + mask->range.start; | |
376 | u8 *d = (u8 *)dst + mask->range.start; | |
377 | int i; | |
378 | ||
379 | memset(dst, 0, sizeof(*dst)); | |
380 | for (i = 0; i < ovs_sw_flow_mask_size_roundup(mask); i++) { | |
381 | *d = *s & *m; | |
382 | d++, s++, m++; | |
383 | } | |
384 | } | |
385 | ||
064af421 BP |
386 | #define TCP_FLAGS_OFFSET 13 |
387 | #define TCP_FLAG_MASK 0x3f | |
388 | ||
850b6b3b | 389 | void ovs_flow_used(struct sw_flow *flow, struct sk_buff *skb) |
064af421 | 390 | { |
064af421 BP |
391 | u8 tcp_flags = 0; |
392 | ||
11460e23 JG |
393 | if ((flow->key.eth.type == htons(ETH_P_IP) || |
394 | flow->key.eth.type == htons(ETH_P_IPV6)) && | |
9c47b45a JG |
395 | flow->key.ip.proto == IPPROTO_TCP && |
396 | likely(skb->len >= skb_transport_offset(skb) + sizeof(struct tcphdr))) { | |
abfec865 BP |
397 | u8 *tcp = (u8 *)tcp_hdr(skb); |
398 | tcp_flags = *(tcp + TCP_FLAGS_OFFSET) & TCP_FLAG_MASK; | |
064af421 BP |
399 | } |
400 | ||
e9141eec | 401 | spin_lock(&flow->lock); |
6bfafa55 | 402 | flow->used = jiffies; |
064af421 BP |
403 | flow->packet_count++; |
404 | flow->byte_count += skb->len; | |
405 | flow->tcp_flags |= tcp_flags; | |
e9141eec | 406 | spin_unlock(&flow->lock); |
064af421 BP |
407 | } |
408 | ||
9b405f1a | 409 | struct sw_flow_actions *ovs_flow_actions_alloc(int size) |
064af421 BP |
410 | { |
411 | struct sw_flow_actions *sfa; | |
412 | ||
9b405f1a | 413 | if (size > MAX_ACTIONS_BUFSIZE) |
064af421 BP |
414 | return ERR_PTR(-EINVAL); |
415 | ||
ba400435 | 416 | sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL); |
064af421 BP |
417 | if (!sfa) |
418 | return ERR_PTR(-ENOMEM); | |
419 | ||
9b405f1a | 420 | sfa->actions_len = 0; |
064af421 BP |
421 | return sfa; |
422 | } | |
423 | ||
850b6b3b | 424 | struct sw_flow *ovs_flow_alloc(void) |
560e8022 JG |
425 | { |
426 | struct sw_flow *flow; | |
427 | ||
428 | flow = kmem_cache_alloc(flow_cache, GFP_KERNEL); | |
429 | if (!flow) | |
430 | return ERR_PTR(-ENOMEM); | |
431 | ||
432 | spin_lock_init(&flow->lock); | |
6f04e94a | 433 | flow->sf_acts = NULL; |
a1c564be | 434 | flow->mask = NULL; |
064af421 | 435 | |
560e8022 JG |
436 | return flow; |
437 | } | |
438 | ||
be2ba156 | 439 | static struct hlist_head *find_bucket(struct flow_table *table, u32 hash) |
8d5ebd83 | 440 | { |
acd051f1 | 441 | hash = jhash_1word(hash, table->hash_seed); |
3544358a PS |
442 | return flex_array_get(table->buckets, |
443 | (hash & (table->n_buckets - 1))); | |
444 | } | |
445 | ||
be2ba156 | 446 | static struct flex_array *alloc_buckets(unsigned int n_buckets) |
3544358a | 447 | { |
be2ba156 | 448 | struct flex_array *buckets; |
3544358a PS |
449 | int i, err; |
450 | ||
8e1a83d8 | 451 | buckets = flex_array_alloc(sizeof(struct hlist_head), |
3544358a PS |
452 | n_buckets, GFP_KERNEL); |
453 | if (!buckets) | |
454 | return NULL; | |
455 | ||
456 | err = flex_array_prealloc(buckets, 0, n_buckets, GFP_KERNEL); | |
457 | if (err) { | |
458 | flex_array_free(buckets); | |
459 | return NULL; | |
460 | } | |
461 | ||
462 | for (i = 0; i < n_buckets; i++) | |
463 | INIT_HLIST_HEAD((struct hlist_head *) | |
464 | flex_array_get(buckets, i)); | |
465 | ||
466 | return buckets; | |
467 | } | |
468 | ||
6455100f | 469 | static void free_buckets(struct flex_array *buckets) |
3544358a PS |
470 | { |
471 | flex_array_free(buckets); | |
472 | } | |
473 | ||
ede77a46 | 474 | static struct flow_table *__flow_tbl_alloc(int new_size) |
3544358a PS |
475 | { |
476 | struct flow_table *table = kmalloc(sizeof(*table), GFP_KERNEL); | |
477 | ||
478 | if (!table) | |
479 | return NULL; | |
480 | ||
481 | table->buckets = alloc_buckets(new_size); | |
482 | ||
483 | if (!table->buckets) { | |
484 | kfree(table); | |
485 | return NULL; | |
486 | } | |
487 | table->n_buckets = new_size; | |
488 | table->count = 0; | |
acd051f1 PS |
489 | table->node_ver = 0; |
490 | table->keep_flows = false; | |
491 | get_random_bytes(&table->hash_seed, sizeof(u32)); | |
ede77a46 | 492 | table->mask_list = NULL; |
3544358a PS |
493 | |
494 | return table; | |
495 | } | |
fb8c9347 | 496 | |
a1c564be | 497 | static void __flow_tbl_destroy(struct flow_table *table) |
3544358a PS |
498 | { |
499 | int i; | |
500 | ||
acd051f1 PS |
501 | if (table->keep_flows) |
502 | goto skip_flows; | |
503 | ||
3544358a PS |
504 | for (i = 0; i < table->n_buckets; i++) { |
505 | struct sw_flow *flow; | |
506 | struct hlist_head *head = flex_array_get(table->buckets, i); | |
f8dfbcb7 | 507 | struct hlist_node *n; |
acd051f1 | 508 | int ver = table->node_ver; |
3544358a | 509 | |
f8dfbcb7 | 510 | hlist_for_each_entry_safe(flow, n, head, hash_node[ver]) { |
16c6b921 | 511 | hlist_del(&flow->hash_node[ver]); |
a1c564be | 512 | ovs_flow_free(flow, false); |
3544358a PS |
513 | } |
514 | } | |
515 | ||
ede77a46 AZ |
516 | BUG_ON(!list_empty(table->mask_list)); |
517 | kfree(table->mask_list); | |
518 | ||
acd051f1 | 519 | skip_flows: |
3544358a PS |
520 | free_buckets(table->buckets); |
521 | kfree(table); | |
522 | } | |
523 | ||
ede77a46 AZ |
524 | struct flow_table *ovs_flow_tbl_alloc(int new_size) |
525 | { | |
526 | struct flow_table *table = __flow_tbl_alloc(new_size); | |
527 | ||
528 | if (!table) | |
529 | return NULL; | |
530 | ||
531 | table->mask_list = kmalloc(sizeof(struct list_head), GFP_KERNEL); | |
532 | if (!table->mask_list) { | |
533 | table->keep_flows = true; | |
534 | __flow_tbl_destroy(table); | |
535 | return NULL; | |
536 | } | |
537 | INIT_LIST_HEAD(table->mask_list); | |
538 | ||
539 | return table; | |
540 | } | |
541 | ||
3544358a PS |
542 | static void flow_tbl_destroy_rcu_cb(struct rcu_head *rcu) |
543 | { | |
544 | struct flow_table *table = container_of(rcu, struct flow_table, rcu); | |
545 | ||
a1c564be | 546 | __flow_tbl_destroy(table); |
3544358a PS |
547 | } |
548 | ||
a1c564be | 549 | void ovs_flow_tbl_destroy(struct flow_table *table, bool deferred) |
3544358a | 550 | { |
6455100f PS |
551 | if (!table) |
552 | return; | |
3544358a | 553 | |
a1c564be AZ |
554 | if (deferred) |
555 | call_rcu(&table->rcu, flow_tbl_destroy_rcu_cb); | |
556 | else | |
557 | __flow_tbl_destroy(table); | |
3544358a PS |
558 | } |
559 | ||
a1c564be | 560 | struct sw_flow *ovs_flow_dump_next(struct flow_table *table, u32 *bucket, u32 *last) |
3544358a PS |
561 | { |
562 | struct sw_flow *flow; | |
563 | struct hlist_head *head; | |
acd051f1 | 564 | int ver; |
3544358a PS |
565 | int i; |
566 | ||
acd051f1 | 567 | ver = table->node_ver; |
3544358a PS |
568 | while (*bucket < table->n_buckets) { |
569 | i = 0; | |
570 | head = flex_array_get(table->buckets, *bucket); | |
f8dfbcb7 | 571 | hlist_for_each_entry_rcu(flow, head, hash_node[ver]) { |
3544358a PS |
572 | if (i < *last) { |
573 | i++; | |
574 | continue; | |
575 | } | |
576 | *last = i + 1; | |
577 | return flow; | |
578 | } | |
579 | (*bucket)++; | |
580 | *last = 0; | |
581 | } | |
582 | ||
583 | return NULL; | |
584 | } | |
585 | ||
a1c564be | 586 | static void __tbl_insert(struct flow_table *table, struct sw_flow *flow) |
13e24889 PS |
587 | { |
588 | struct hlist_head *head; | |
a1c564be | 589 | |
13e24889 PS |
590 | head = find_bucket(table, flow->hash); |
591 | hlist_add_head_rcu(&flow->hash_node[table->node_ver], head); | |
a1c564be | 592 | |
13e24889 PS |
593 | table->count++; |
594 | } | |
595 | ||
acd051f1 | 596 | static void flow_table_copy_flows(struct flow_table *old, struct flow_table *new) |
3544358a | 597 | { |
acd051f1 | 598 | int old_ver; |
3544358a PS |
599 | int i; |
600 | ||
acd051f1 PS |
601 | old_ver = old->node_ver; |
602 | new->node_ver = !old_ver; | |
3544358a | 603 | |
acd051f1 PS |
604 | /* Insert in new table. */ |
605 | for (i = 0; i < old->n_buckets; i++) { | |
3544358a PS |
606 | struct sw_flow *flow; |
607 | struct hlist_head *head; | |
3544358a | 608 | |
acd051f1 | 609 | head = flex_array_get(old->buckets, i); |
3544358a | 610 | |
f8dfbcb7 | 611 | hlist_for_each_entry(flow, head, hash_node[old_ver]) |
a1c564be | 612 | __tbl_insert(new, flow); |
3544358a | 613 | } |
a1c564be AZ |
614 | |
615 | new->mask_list = old->mask_list; | |
acd051f1 PS |
616 | old->keep_flows = true; |
617 | } | |
618 | ||
619 | static struct flow_table *__flow_tbl_rehash(struct flow_table *table, int n_buckets) | |
620 | { | |
621 | struct flow_table *new_table; | |
622 | ||
ede77a46 | 623 | new_table = __flow_tbl_alloc(n_buckets); |
acd051f1 PS |
624 | if (!new_table) |
625 | return ERR_PTR(-ENOMEM); | |
626 | ||
627 | flow_table_copy_flows(table, new_table); | |
3544358a PS |
628 | |
629 | return new_table; | |
630 | } | |
631 | ||
acd051f1 PS |
632 | struct flow_table *ovs_flow_tbl_rehash(struct flow_table *table) |
633 | { | |
634 | return __flow_tbl_rehash(table, table->n_buckets); | |
635 | } | |
636 | ||
637 | struct flow_table *ovs_flow_tbl_expand(struct flow_table *table) | |
638 | { | |
639 | return __flow_tbl_rehash(table, table->n_buckets * 2); | |
640 | } | |
641 | ||
a1c564be | 642 | static void __flow_free(struct sw_flow *flow) |
9321954a | 643 | { |
9321954a JG |
644 | kfree((struct sf_flow_acts __force *)flow->sf_acts); |
645 | kmem_cache_free(flow_cache, flow); | |
646 | } | |
647 | ||
064af421 BP |
648 | static void rcu_free_flow_callback(struct rcu_head *rcu) |
649 | { | |
650 | struct sw_flow *flow = container_of(rcu, struct sw_flow, rcu); | |
fb8c9347 | 651 | |
a1c564be | 652 | __flow_free(flow); |
064af421 BP |
653 | } |
654 | ||
a1c564be | 655 | void ovs_flow_free(struct sw_flow *flow, bool deferred) |
064af421 | 656 | { |
a1c564be AZ |
657 | if (!flow) |
658 | return; | |
659 | ||
3d097064 | 660 | ovs_sw_flow_mask_del_ref(flow->mask, deferred); |
a1c564be AZ |
661 | |
662 | if (deferred) | |
663 | call_rcu(&flow->rcu, rcu_free_flow_callback); | |
664 | else | |
665 | __flow_free(flow); | |
064af421 BP |
666 | } |
667 | ||
850b6b3b | 668 | /* RCU callback used by ovs_flow_deferred_free_acts. */ |
064af421 BP |
669 | static void rcu_free_acts_callback(struct rcu_head *rcu) |
670 | { | |
d295e8e9 | 671 | struct sw_flow_actions *sf_acts = container_of(rcu, |
064af421 | 672 | struct sw_flow_actions, rcu); |
ba400435 | 673 | kfree(sf_acts); |
064af421 BP |
674 | } |
675 | ||
676 | /* Schedules 'sf_acts' to be freed after the next RCU grace period. | |
677 | * The caller must hold rcu_read_lock for this to be sensible. */ | |
850b6b3b | 678 | void ovs_flow_deferred_free_acts(struct sw_flow_actions *sf_acts) |
064af421 BP |
679 | { |
680 | call_rcu(&sf_acts->rcu, rcu_free_acts_callback); | |
681 | } | |
682 | ||
2db65bf7 | 683 | static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key) |
064af421 | 684 | { |
50f06e16 BP |
685 | struct qtag_prefix { |
686 | __be16 eth_type; /* ETH_P_8021Q */ | |
687 | __be16 tci; | |
688 | }; | |
689 | struct qtag_prefix *qp; | |
690 | ||
8ddc056d BP |
691 | if (unlikely(skb->len < sizeof(struct qtag_prefix) + sizeof(__be16))) |
692 | return 0; | |
693 | ||
2db65bf7 JG |
694 | if (unlikely(!pskb_may_pull(skb, sizeof(struct qtag_prefix) + |
695 | sizeof(__be16)))) | |
696 | return -ENOMEM; | |
50f06e16 BP |
697 | |
698 | qp = (struct qtag_prefix *) skb->data; | |
76abe283 | 699 | key->eth.tci = qp->tci | htons(VLAN_TAG_PRESENT); |
50f06e16 | 700 | __skb_pull(skb, sizeof(struct qtag_prefix)); |
2db65bf7 JG |
701 | |
702 | return 0; | |
50f06e16 BP |
703 | } |
704 | ||
705 | static __be16 parse_ethertype(struct sk_buff *skb) | |
064af421 | 706 | { |
50f06e16 BP |
707 | struct llc_snap_hdr { |
708 | u8 dsap; /* Always 0xAA */ | |
709 | u8 ssap; /* Always 0xAA */ | |
710 | u8 ctrl; | |
711 | u8 oui[3]; | |
8dda8c9b | 712 | __be16 ethertype; |
50f06e16 BP |
713 | }; |
714 | struct llc_snap_hdr *llc; | |
715 | __be16 proto; | |
716 | ||
717 | proto = *(__be16 *) skb->data; | |
718 | __skb_pull(skb, sizeof(__be16)); | |
719 | ||
7cd46155 | 720 | if (ntohs(proto) >= ETH_P_802_3_MIN) |
50f06e16 BP |
721 | return proto; |
722 | ||
2db65bf7 | 723 | if (skb->len < sizeof(struct llc_snap_hdr)) |
36956a7d | 724 | return htons(ETH_P_802_2); |
50f06e16 | 725 | |
2db65bf7 JG |
726 | if (unlikely(!pskb_may_pull(skb, sizeof(struct llc_snap_hdr)))) |
727 | return htons(0); | |
728 | ||
50f06e16 BP |
729 | llc = (struct llc_snap_hdr *) skb->data; |
730 | if (llc->dsap != LLC_SAP_SNAP || | |
731 | llc->ssap != LLC_SAP_SNAP || | |
732 | (llc->oui[0] | llc->oui[1] | llc->oui[2]) != 0) | |
36956a7d | 733 | return htons(ETH_P_802_2); |
50f06e16 BP |
734 | |
735 | __skb_pull(skb, sizeof(struct llc_snap_hdr)); | |
9e69bc5f | 736 | |
7cd46155 | 737 | if (ntohs(llc->ethertype) >= ETH_P_802_3_MIN) |
9e69bc5f RL |
738 | return llc->ethertype; |
739 | ||
740 | return htons(ETH_P_802_2); | |
064af421 BP |
741 | } |
742 | ||
685a51a5 | 743 | static int parse_icmpv6(struct sk_buff *skb, struct sw_flow_key *key, |
a1c564be | 744 | int nh_len) |
685a51a5 | 745 | { |
685a51a5 JP |
746 | struct icmp6hdr *icmp = icmp6_hdr(skb); |
747 | ||
748 | /* The ICMPv6 type and code fields use the 16-bit transport port | |
bfef4717 JG |
749 | * fields, so we need to store them in 16-bit network byte order. |
750 | */ | |
76abe283 AE |
751 | key->ipv6.tp.src = htons(icmp->icmp6_type); |
752 | key->ipv6.tp.dst = htons(icmp->icmp6_code); | |
685a51a5 | 753 | |
bfef4717 JG |
754 | if (icmp->icmp6_code == 0 && |
755 | (icmp->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION || | |
756 | icmp->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT)) { | |
e977ba19 | 757 | int icmp_len = skb->len - skb_transport_offset(skb); |
685a51a5 JP |
758 | struct nd_msg *nd; |
759 | int offset; | |
760 | ||
761 | /* In order to process neighbor discovery options, we need the | |
bfef4717 JG |
762 | * entire packet. |
763 | */ | |
764 | if (unlikely(icmp_len < sizeof(*nd))) | |
a1c564be AZ |
765 | return 0; |
766 | ||
767 | if (unlikely(skb_linearize(skb))) | |
768 | return -ENOMEM; | |
685a51a5 JP |
769 | |
770 | nd = (struct nd_msg *)skb_transport_header(skb); | |
858d1026 | 771 | key->ipv6.nd.target = nd->target; |
685a51a5 JP |
772 | |
773 | icmp_len -= sizeof(*nd); | |
774 | offset = 0; | |
775 | while (icmp_len >= 8) { | |
6455100f PS |
776 | struct nd_opt_hdr *nd_opt = |
777 | (struct nd_opt_hdr *)(nd->opt + offset); | |
685a51a5 JP |
778 | int opt_len = nd_opt->nd_opt_len * 8; |
779 | ||
bfef4717 | 780 | if (unlikely(!opt_len || opt_len > icmp_len)) |
a1c564be | 781 | return 0; |
685a51a5 | 782 | |
bfef4717 JG |
783 | /* Store the link layer address if the appropriate |
784 | * option is provided. It is considered an error if | |
785 | * the same link layer option is specified twice. | |
786 | */ | |
685a51a5 | 787 | if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LL_ADDR |
bfef4717 | 788 | && opt_len == 8) { |
76abe283 | 789 | if (unlikely(!is_zero_ether_addr(key->ipv6.nd.sll))) |
685a51a5 | 790 | goto invalid; |
76abe283 | 791 | memcpy(key->ipv6.nd.sll, |
bfef4717 | 792 | &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN); |
685a51a5 | 793 | } else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LL_ADDR |
bfef4717 | 794 | && opt_len == 8) { |
76abe283 | 795 | if (unlikely(!is_zero_ether_addr(key->ipv6.nd.tll))) |
685a51a5 | 796 | goto invalid; |
76abe283 | 797 | memcpy(key->ipv6.nd.tll, |
bfef4717 | 798 | &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN); |
685a51a5 JP |
799 | } |
800 | ||
801 | icmp_len -= opt_len; | |
802 | offset += opt_len; | |
803 | } | |
804 | } | |
805 | ||
a1c564be | 806 | return 0; |
685a51a5 JP |
807 | |
808 | invalid: | |
76abe283 AE |
809 | memset(&key->ipv6.nd.target, 0, sizeof(key->ipv6.nd.target)); |
810 | memset(key->ipv6.nd.sll, 0, sizeof(key->ipv6.nd.sll)); | |
811 | memset(key->ipv6.nd.tll, 0, sizeof(key->ipv6.nd.tll)); | |
685a51a5 | 812 | |
a1c564be | 813 | return 0; |
685a51a5 JP |
814 | } |
815 | ||
a31e0e31 | 816 | /** |
850b6b3b | 817 | * ovs_flow_extract - extracts a flow key from an Ethernet frame. |
a31e0e31 BP |
818 | * @skb: sk_buff that contains the frame, with skb->data pointing to the |
819 | * Ethernet header | |
820 | * @in_port: port number on which @skb was received. | |
821 | * @key: output flow key | |
822 | * | |
823 | * The caller must ensure that skb->len >= ETH_HLEN. | |
824 | * | |
4c1ad233 BP |
825 | * Returns 0 if successful, otherwise a negative errno value. |
826 | * | |
59a18f80 BP |
827 | * Initializes @skb header pointers as follows: |
828 | * | |
829 | * - skb->mac_header: the Ethernet header. | |
830 | * | |
831 | * - skb->network_header: just past the Ethernet header, or just past the | |
832 | * VLAN header, to the first byte of the Ethernet payload. | |
833 | * | |
ae9020cf | 834 | * - skb->transport_header: If key->eth.type is ETH_P_IP or ETH_P_IPV6 |
d31f1109 JP |
835 | * on output, then just past the IP header, if one is present and |
836 | * of a correct length, otherwise the same as skb->network_header. | |
ae9020cf | 837 | * For other key->eth.type values it is left untouched. |
a31e0e31 | 838 | */ |
a1c564be | 839 | int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key) |
064af421 | 840 | { |
a1c564be | 841 | int error; |
064af421 | 842 | struct ethhdr *eth; |
064af421 | 843 | |
84c17d98 | 844 | memset(key, 0, sizeof(*key)); |
abff858b PS |
845 | |
846 | key->phy.priority = skb->priority; | |
356af50b | 847 | if (OVS_CB(skb)->tun_key) |
6694e498 | 848 | memcpy(&key->tun_key, OVS_CB(skb)->tun_key, sizeof(key->tun_key)); |
abff858b | 849 | key->phy.in_port = in_port; |
72e8bf28 | 850 | key->phy.skb_mark = skb_get_mark(skb); |
064af421 | 851 | |
064af421 | 852 | skb_reset_mac_header(skb); |
064af421 | 853 | |
2db65bf7 JG |
854 | /* Link layer. We are guaranteed to have at least the 14 byte Ethernet |
855 | * header in the linear data area. | |
856 | */ | |
50f06e16 | 857 | eth = eth_hdr(skb); |
76abe283 AE |
858 | memcpy(key->eth.src, eth->h_source, ETH_ALEN); |
859 | memcpy(key->eth.dst, eth->h_dest, ETH_ALEN); | |
860 | ||
50f06e16 | 861 | __skb_pull(skb, 2 * ETH_ALEN); |
3cfede14 PS |
862 | /* We are going to push all headers that we pull, so no need to |
863 | * update skb->csum here. */ | |
6ce39213 JG |
864 | |
865 | if (vlan_tx_tag_present(skb)) | |
76abe283 | 866 | key->eth.tci = htons(vlan_get_tci(skb)); |
6ce39213 | 867 | else if (eth->h_proto == htons(ETH_P_8021Q)) |
2db65bf7 JG |
868 | if (unlikely(parse_vlan(skb, key))) |
869 | return -ENOMEM; | |
6ce39213 | 870 | |
76abe283 AE |
871 | key->eth.type = parse_ethertype(skb); |
872 | if (unlikely(key->eth.type == htons(0))) | |
2db65bf7 JG |
873 | return -ENOMEM; |
874 | ||
50f06e16 | 875 | skb_reset_network_header(skb); |
2db65bf7 | 876 | __skb_push(skb, skb->data - skb_mac_header(skb)); |
064af421 BP |
877 | |
878 | /* Network layer. */ | |
76abe283 | 879 | if (key->eth.type == htons(ETH_P_IP)) { |
4c1ad233 | 880 | struct iphdr *nh; |
7257b535 | 881 | __be16 offset; |
76abe283 | 882 | |
4c1ad233 BP |
883 | error = check_iphdr(skb); |
884 | if (unlikely(error)) { | |
885 | if (error == -EINVAL) { | |
886 | skb->transport_header = skb->network_header; | |
76abe283 | 887 | error = 0; |
4c1ad233 | 888 | } |
a1c564be | 889 | return error; |
4c1ad233 BP |
890 | } |
891 | ||
892 | nh = ip_hdr(skb); | |
76abe283 AE |
893 | key->ipv4.addr.src = nh->saddr; |
894 | key->ipv4.addr.dst = nh->daddr; | |
7257b535 | 895 | |
28bad473 | 896 | key->ip.proto = nh->protocol; |
530180fd | 897 | key->ip.tos = nh->tos; |
a61680c6 | 898 | key->ip.ttl = nh->ttl; |
064af421 | 899 | |
7257b535 BP |
900 | offset = nh->frag_off & htons(IP_OFFSET); |
901 | if (offset) { | |
9e44d715 | 902 | key->ip.frag = OVS_FRAG_TYPE_LATER; |
a1c564be | 903 | return 0; |
7257b535 BP |
904 | } |
905 | if (nh->frag_off & htons(IP_MF) || | |
906 | skb_shinfo(skb)->gso_type & SKB_GSO_UDP) | |
9e44d715 | 907 | key->ip.frag = OVS_FRAG_TYPE_FIRST; |
b7a31ec1 | 908 | |
7257b535 | 909 | /* Transport layer. */ |
28bad473 | 910 | if (key->ip.proto == IPPROTO_TCP) { |
7257b535 | 911 | if (tcphdr_ok(skb)) { |
5f4d087c JG |
912 | struct tcphdr *tcp = tcp_hdr(skb); |
913 | key->ipv4.tp.src = tcp->source; | |
914 | key->ipv4.tp.dst = tcp->dest; | |
915 | } | |
28bad473 | 916 | } else if (key->ip.proto == IPPROTO_UDP) { |
7257b535 | 917 | if (udphdr_ok(skb)) { |
5f4d087c JG |
918 | struct udphdr *udp = udp_hdr(skb); |
919 | key->ipv4.tp.src = udp->source; | |
920 | key->ipv4.tp.dst = udp->dest; | |
921 | } | |
10f72e3d JS |
922 | } else if (key->ip.proto == IPPROTO_SCTP) { |
923 | if (sctphdr_ok(skb)) { | |
924 | struct sctphdr *sctp = sctp_hdr(skb); | |
925 | key->ipv4.tp.src = sctp->source; | |
926 | key->ipv4.tp.dst = sctp->dest; | |
927 | } | |
28bad473 | 928 | } else if (key->ip.proto == IPPROTO_ICMP) { |
7257b535 | 929 | if (icmphdr_ok(skb)) { |
5f4d087c JG |
930 | struct icmphdr *icmp = icmp_hdr(skb); |
931 | /* The ICMP type and code fields use the 16-bit | |
6455100f PS |
932 | * transport port fields, so we need to store |
933 | * them in 16-bit network byte order. */ | |
5f4d087c JG |
934 | key->ipv4.tp.src = htons(icmp->type); |
935 | key->ipv4.tp.dst = htons(icmp->code); | |
936 | } | |
937 | } | |
938 | ||
8087f5ff MM |
939 | } else if ((key->eth.type == htons(ETH_P_ARP) || |
940 | key->eth.type == htons(ETH_P_RARP)) && arphdr_ok(skb)) { | |
a26ef517 JP |
941 | struct arp_eth_header *arp; |
942 | ||
943 | arp = (struct arp_eth_header *)skb_network_header(skb); | |
944 | ||
f5e86186 | 945 | if (arp->ar_hrd == htons(ARPHRD_ETHER) |
de3f65ea JP |
946 | && arp->ar_pro == htons(ETH_P_IP) |
947 | && arp->ar_hln == ETH_ALEN | |
948 | && arp->ar_pln == 4) { | |
949 | ||
950 | /* We only match on the lower 8 bits of the opcode. */ | |
b7a31ec1 | 951 | if (ntohs(arp->ar_op) <= 0xff) |
28bad473 | 952 | key->ip.proto = ntohs(arp->ar_op); |
a3d3ad0c MM |
953 | memcpy(&key->ipv4.addr.src, arp->ar_sip, sizeof(key->ipv4.addr.src)); |
954 | memcpy(&key->ipv4.addr.dst, arp->ar_tip, sizeof(key->ipv4.addr.dst)); | |
955 | memcpy(key->ipv4.arp.sha, arp->ar_sha, ETH_ALEN); | |
956 | memcpy(key->ipv4.arp.tha, arp->ar_tha, ETH_ALEN); | |
de3f65ea | 957 | } |
76abe283 | 958 | } else if (key->eth.type == htons(ETH_P_IPV6)) { |
d31f1109 JP |
959 | int nh_len; /* IPv6 Header + Extensions */ |
960 | ||
a1c564be | 961 | nh_len = parse_ipv6hdr(skb, key); |
d31f1109 | 962 | if (unlikely(nh_len < 0)) { |
a1c564be | 963 | if (nh_len == -EINVAL) { |
d31f1109 | 964 | skb->transport_header = skb->network_header; |
a1c564be AZ |
965 | error = 0; |
966 | } else { | |
76abe283 | 967 | error = nh_len; |
a1c564be AZ |
968 | } |
969 | return error; | |
d31f1109 JP |
970 | } |
971 | ||
9e44d715 | 972 | if (key->ip.frag == OVS_FRAG_TYPE_LATER) |
a1c564be | 973 | return 0; |
7257b535 | 974 | if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP) |
9e44d715 | 975 | key->ip.frag = OVS_FRAG_TYPE_FIRST; |
7257b535 | 976 | |
d31f1109 | 977 | /* Transport layer. */ |
28bad473 | 978 | if (key->ip.proto == NEXTHDR_TCP) { |
d31f1109 JP |
979 | if (tcphdr_ok(skb)) { |
980 | struct tcphdr *tcp = tcp_hdr(skb); | |
76abe283 AE |
981 | key->ipv6.tp.src = tcp->source; |
982 | key->ipv6.tp.dst = tcp->dest; | |
d31f1109 | 983 | } |
28bad473 | 984 | } else if (key->ip.proto == NEXTHDR_UDP) { |
d31f1109 JP |
985 | if (udphdr_ok(skb)) { |
986 | struct udphdr *udp = udp_hdr(skb); | |
76abe283 AE |
987 | key->ipv6.tp.src = udp->source; |
988 | key->ipv6.tp.dst = udp->dest; | |
d31f1109 | 989 | } |
10f72e3d JS |
990 | } else if (key->ip.proto == NEXTHDR_SCTP) { |
991 | if (sctphdr_ok(skb)) { | |
992 | struct sctphdr *sctp = sctp_hdr(skb); | |
993 | key->ipv6.tp.src = sctp->source; | |
994 | key->ipv6.tp.dst = sctp->dest; | |
995 | } | |
28bad473 | 996 | } else if (key->ip.proto == NEXTHDR_ICMP) { |
d31f1109 | 997 | if (icmp6hdr_ok(skb)) { |
a1c564be AZ |
998 | error = parse_icmpv6(skb, key, nh_len); |
999 | if (error) | |
1000 | return error; | |
d31f1109 JP |
1001 | } |
1002 | } | |
064af421 | 1003 | } |
76abe283 | 1004 | |
a1c564be | 1005 | return 0; |
064af421 BP |
1006 | } |
1007 | ||
13e24889 | 1008 | static u32 ovs_flow_hash(const struct sw_flow_key *key, int key_start, int key_len) |
8d5ebd83 | 1009 | { |
13e24889 PS |
1010 | return jhash2((u32 *)((u8 *)key + key_start), |
1011 | DIV_ROUND_UP(key_len - key_start, sizeof(u32)), 0); | |
1012 | } | |
1013 | ||
a1c564be | 1014 | static int flow_key_start(const struct sw_flow_key *key) |
13e24889 | 1015 | { |
6694e498 | 1016 | if (key->tun_key.ipv4_dst) |
13e24889 PS |
1017 | return 0; |
1018 | else | |
6694e498 | 1019 | return offsetof(struct sw_flow_key, phy); |
8d5ebd83 JG |
1020 | } |
1021 | ||
a1c564be AZ |
1022 | static bool __cmp_key(const struct sw_flow_key *key1, |
1023 | const struct sw_flow_key *key2, int key_start, int key_len) | |
1024 | { | |
1025 | return !memcmp((u8 *)key1 + key_start, | |
1026 | (u8 *)key2 + key_start, (key_len - key_start)); | |
1027 | } | |
1028 | ||
1029 | static bool __flow_cmp_key(const struct sw_flow *flow, | |
1030 | const struct sw_flow_key *key, int key_start, int key_len) | |
1031 | { | |
1032 | return __cmp_key(&flow->key, key, key_start, key_len); | |
1033 | } | |
1034 | ||
1035 | static bool __flow_cmp_unmasked_key(const struct sw_flow *flow, | |
1036 | const struct sw_flow_key *key, int key_start, int key_len) | |
1037 | { | |
1038 | return __cmp_key(&flow->unmasked_key, key, key_start, key_len); | |
1039 | } | |
1040 | ||
1041 | bool ovs_flow_cmp_unmasked_key(const struct sw_flow *flow, | |
1042 | const struct sw_flow_key *key, int key_len) | |
1043 | { | |
1044 | int key_start; | |
1045 | key_start = flow_key_start(key); | |
1046 | ||
1047 | return __flow_cmp_unmasked_key(flow, key, key_start, key_len); | |
1048 | ||
1049 | } | |
1050 | ||
1051 | struct sw_flow *ovs_flow_lookup_unmasked_key(struct flow_table *table, | |
1052 | struct sw_flow_match *match) | |
1053 | { | |
1054 | struct sw_flow_key *unmasked = match->key; | |
1055 | int key_len = match->range.end; | |
1056 | struct sw_flow *flow; | |
1057 | ||
1058 | flow = ovs_flow_lookup(table, unmasked); | |
1059 | if (flow && (!ovs_flow_cmp_unmasked_key(flow, unmasked, key_len))) | |
1060 | flow = NULL; | |
1061 | ||
1062 | return flow; | |
1063 | } | |
1064 | ||
1065 | static struct sw_flow *ovs_masked_flow_lookup(struct flow_table *table, | |
1066 | const struct sw_flow_key *flow_key, | |
1067 | struct sw_flow_mask *mask) | |
8d5ebd83 | 1068 | { |
3544358a | 1069 | struct sw_flow *flow; |
3544358a | 1070 | struct hlist_head *head; |
a1c564be AZ |
1071 | int key_start = mask->range.start; |
1072 | int key_len = mask->range.end; | |
3544358a | 1073 | u32 hash; |
a1c564be | 1074 | struct sw_flow_key masked_key; |
8d5ebd83 | 1075 | |
529db635 | 1076 | ovs_flow_key_mask(&masked_key, flow_key, mask); |
a1c564be | 1077 | hash = ovs_flow_hash(&masked_key, key_start, key_len); |
3544358a | 1078 | head = find_bucket(table, hash); |
f8dfbcb7 | 1079 | hlist_for_each_entry_rcu(flow, head, hash_node[table->node_ver]) { |
a99c219c AZ |
1080 | if (flow->mask == mask && |
1081 | __flow_cmp_key(flow, &masked_key, key_start, key_len)) | |
3544358a | 1082 | return flow; |
3544358a PS |
1083 | } |
1084 | return NULL; | |
1085 | } | |
1086 | ||
a1c564be AZ |
1087 | struct sw_flow *ovs_flow_lookup(struct flow_table *tbl, |
1088 | const struct sw_flow_key *key) | |
3544358a | 1089 | { |
a1c564be AZ |
1090 | struct sw_flow *flow = NULL; |
1091 | struct sw_flow_mask *mask; | |
1092 | ||
ede77a46 | 1093 | list_for_each_entry_rcu(mask, tbl->mask_list, list) { |
a1c564be AZ |
1094 | flow = ovs_masked_flow_lookup(tbl, key, mask); |
1095 | if (flow) /* Found */ | |
1096 | break; | |
1097 | } | |
1098 | ||
1099 | return flow; | |
3544358a PS |
1100 | } |
1101 | ||
a1c564be | 1102 | |
529db635 | 1103 | void ovs_flow_insert(struct flow_table *table, struct sw_flow *flow) |
a1c564be | 1104 | { |
3d097064 AZ |
1105 | flow->hash = ovs_flow_hash(&flow->key, flow->mask->range.start, |
1106 | flow->mask->range.end); | |
a1c564be AZ |
1107 | __tbl_insert(table, flow); |
1108 | } | |
1109 | ||
1110 | void ovs_flow_remove(struct flow_table *table, struct sw_flow *flow) | |
3544358a | 1111 | { |
49c7f80c | 1112 | BUG_ON(table->count == 0); |
acd051f1 PS |
1113 | hlist_del_rcu(&flow->hash_node[table->node_ver]); |
1114 | table->count--; | |
36956a7d BP |
1115 | } |
1116 | ||
df2c07f4 | 1117 | /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */ |
4094406f BP |
1118 | const int ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = { |
1119 | [OVS_KEY_ATTR_ENCAP] = -1, | |
a1bf209f BP |
1120 | [OVS_KEY_ATTR_PRIORITY] = sizeof(u32), |
1121 | [OVS_KEY_ATTR_IN_PORT] = sizeof(u32), | |
72e8bf28 | 1122 | [OVS_KEY_ATTR_SKB_MARK] = sizeof(u32), |
df2c07f4 | 1123 | [OVS_KEY_ATTR_ETHERNET] = sizeof(struct ovs_key_ethernet), |
fea393b1 | 1124 | [OVS_KEY_ATTR_VLAN] = sizeof(__be16), |
a1bf209f | 1125 | [OVS_KEY_ATTR_ETHERTYPE] = sizeof(__be16), |
df2c07f4 JP |
1126 | [OVS_KEY_ATTR_IPV4] = sizeof(struct ovs_key_ipv4), |
1127 | [OVS_KEY_ATTR_IPV6] = sizeof(struct ovs_key_ipv6), | |
1128 | [OVS_KEY_ATTR_TCP] = sizeof(struct ovs_key_tcp), | |
1129 | [OVS_KEY_ATTR_UDP] = sizeof(struct ovs_key_udp), | |
10f72e3d | 1130 | [OVS_KEY_ATTR_SCTP] = sizeof(struct ovs_key_sctp), |
df2c07f4 JP |
1131 | [OVS_KEY_ATTR_ICMP] = sizeof(struct ovs_key_icmp), |
1132 | [OVS_KEY_ATTR_ICMPV6] = sizeof(struct ovs_key_icmpv6), | |
1133 | [OVS_KEY_ATTR_ARP] = sizeof(struct ovs_key_arp), | |
1134 | [OVS_KEY_ATTR_ND] = sizeof(struct ovs_key_nd), | |
9b405f1a | 1135 | [OVS_KEY_ATTR_TUNNEL] = -1, |
80e5eed9 BP |
1136 | }; |
1137 | ||
a1c564be | 1138 | static bool is_all_zero(const u8 *fp, size_t size) |
34118cae | 1139 | { |
a1c564be | 1140 | int i; |
34118cae | 1141 | |
a1c564be AZ |
1142 | if (!fp) |
1143 | return false; | |
34118cae | 1144 | |
a1c564be AZ |
1145 | for (i = 0; i < size; i++) |
1146 | if (fp[i]) | |
1147 | return false; | |
34118cae | 1148 | |
a1c564be | 1149 | return true; |
34118cae BP |
1150 | } |
1151 | ||
a1c564be AZ |
1152 | static int __parse_flow_nlattrs(const struct nlattr *attr, |
1153 | const struct nlattr *a[], | |
1154 | u64 *attrsp, bool nz) | |
fea393b1 BP |
1155 | { |
1156 | const struct nlattr *nla; | |
1157 | u64 attrs; | |
1158 | int rem; | |
1159 | ||
a1c564be | 1160 | attrs = *attrsp; |
fea393b1 BP |
1161 | nla_for_each_nested(nla, attr, rem) { |
1162 | u16 type = nla_type(nla); | |
4094406f | 1163 | int expected_len; |
fea393b1 | 1164 | |
1b936472 AZ |
1165 | if (type > OVS_KEY_ATTR_MAX) { |
1166 | OVS_NLERR("Unknown key attribute (type=%d, max=%d).\n", | |
1167 | type, OVS_KEY_ATTR_MAX); | |
1168 | } | |
4094406f | 1169 | |
1b936472 AZ |
1170 | if (attrs & (1ULL << type)) { |
1171 | OVS_NLERR("Duplicate key attribute (type %d).\n", type); | |
4094406f | 1172 | return -EINVAL; |
1b936472 | 1173 | } |
4094406f | 1174 | |
1b936472 AZ |
1175 | expected_len = ovs_key_lens[type]; |
1176 | if (nla_len(nla) != expected_len && expected_len != -1) { | |
1177 | OVS_NLERR("Key attribute has unexpected length (type=%d" | |
1178 | ", length=%d, expected=%d).\n", type, | |
1179 | nla_len(nla), expected_len); | |
a1c564be | 1180 | return -EINVAL; |
1b936472 | 1181 | } |
a1c564be AZ |
1182 | |
1183 | if (!nz || !is_all_zero(nla_data(nla), expected_len)) { | |
1184 | attrs |= 1ULL << type; | |
1185 | a[type] = nla; | |
1186 | } | |
fea393b1 | 1187 | } |
1b936472 AZ |
1188 | if (rem) { |
1189 | OVS_NLERR("Message has %d unknown bytes.\n", rem); | |
fea393b1 | 1190 | return -EINVAL; |
1b936472 | 1191 | } |
fea393b1 BP |
1192 | |
1193 | *attrsp = attrs; | |
1194 | return 0; | |
1195 | } | |
1196 | ||
a1c564be AZ |
1197 | static int parse_flow_mask_nlattrs(const struct nlattr *attr, |
1198 | const struct nlattr *a[], u64 *attrsp) | |
1199 | { | |
1200 | return __parse_flow_nlattrs(attr, a, attrsp, true); | |
1201 | } | |
1202 | ||
1203 | static int parse_flow_nlattrs(const struct nlattr *attr, | |
1204 | const struct nlattr *a[], u64 *attrsp) | |
1205 | { | |
1206 | return __parse_flow_nlattrs(attr, a, attrsp, false); | |
1207 | } | |
1208 | ||
54cc3ec6 JG |
1209 | int ovs_ipv4_tun_from_nlattr(const struct nlattr *attr, |
1210 | struct sw_flow_match *match, bool is_mask) | |
9b405f1a PS |
1211 | { |
1212 | struct nlattr *a; | |
1213 | int rem; | |
1214 | bool ttl = false; | |
5ebaf571 | 1215 | __be16 tun_flags = 0; |
9b405f1a PS |
1216 | |
1217 | nla_for_each_nested(a, attr, rem) { | |
1218 | int type = nla_type(a); | |
1219 | static const u32 ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = { | |
1220 | [OVS_TUNNEL_KEY_ATTR_ID] = sizeof(u64), | |
1221 | [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = sizeof(u32), | |
1222 | [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = sizeof(u32), | |
1223 | [OVS_TUNNEL_KEY_ATTR_TOS] = 1, | |
1224 | [OVS_TUNNEL_KEY_ATTR_TTL] = 1, | |
1225 | [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = 0, | |
1226 | [OVS_TUNNEL_KEY_ATTR_CSUM] = 0, | |
1227 | }; | |
1228 | ||
1b936472 | 1229 | if (type > OVS_TUNNEL_KEY_ATTR_MAX) { |
17ce1965 | 1230 | OVS_NLERR("Unknown IPv4 tunnel attribute (type=%d, max=%d).\n", |
1b936472 AZ |
1231 | type, OVS_TUNNEL_KEY_ATTR_MAX); |
1232 | return -EINVAL; | |
1233 | } | |
1234 | ||
1235 | if (ovs_tunnel_key_lens[type] != nla_len(a)) { | |
1236 | OVS_NLERR("IPv4 tunnel attribute type has unexpected " | |
e821558d | 1237 | " length (type=%d, length=%d, expected=%d).\n", |
1b936472 | 1238 | type, nla_len(a), ovs_tunnel_key_lens[type]); |
9b405f1a | 1239 | return -EINVAL; |
1b936472 | 1240 | } |
9b405f1a PS |
1241 | |
1242 | switch (type) { | |
1243 | case OVS_TUNNEL_KEY_ATTR_ID: | |
a1c564be AZ |
1244 | SW_FLOW_KEY_PUT(match, tun_key.tun_id, |
1245 | nla_get_be64(a), is_mask); | |
5ebaf571 | 1246 | tun_flags |= TUNNEL_KEY; |
9b405f1a PS |
1247 | break; |
1248 | case OVS_TUNNEL_KEY_ATTR_IPV4_SRC: | |
a1c564be AZ |
1249 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_src, |
1250 | nla_get_be32(a), is_mask); | |
9b405f1a PS |
1251 | break; |
1252 | case OVS_TUNNEL_KEY_ATTR_IPV4_DST: | |
a1c564be AZ |
1253 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_dst, |
1254 | nla_get_be32(a), is_mask); | |
9b405f1a PS |
1255 | break; |
1256 | case OVS_TUNNEL_KEY_ATTR_TOS: | |
a1c564be AZ |
1257 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_tos, |
1258 | nla_get_u8(a), is_mask); | |
9b405f1a PS |
1259 | break; |
1260 | case OVS_TUNNEL_KEY_ATTR_TTL: | |
a1c564be AZ |
1261 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_ttl, |
1262 | nla_get_u8(a), is_mask); | |
9b405f1a PS |
1263 | ttl = true; |
1264 | break; | |
1265 | case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT: | |
5ebaf571 | 1266 | tun_flags |= TUNNEL_DONT_FRAGMENT; |
9b405f1a PS |
1267 | break; |
1268 | case OVS_TUNNEL_KEY_ATTR_CSUM: | |
5ebaf571 | 1269 | tun_flags |= TUNNEL_CSUM; |
9b405f1a PS |
1270 | break; |
1271 | default: | |
1272 | return -EINVAL; | |
9b405f1a PS |
1273 | } |
1274 | } | |
a1c564be AZ |
1275 | |
1276 | SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask); | |
1277 | ||
1b936472 AZ |
1278 | if (rem > 0) { |
1279 | OVS_NLERR("IPv4 tunnel attribute has %d unknown bytes.\n", rem); | |
9b405f1a | 1280 | return -EINVAL; |
1b936472 | 1281 | } |
9b405f1a | 1282 | |
01fcdfc6 JG |
1283 | if (!is_mask) { |
1284 | if (!match->key->tun_key.ipv4_dst) { | |
1285 | OVS_NLERR("IPv4 tunnel destination address is zero.\n"); | |
1286 | return -EINVAL; | |
1287 | } | |
9b405f1a | 1288 | |
01fcdfc6 JG |
1289 | if (!ttl) { |
1290 | OVS_NLERR("IPv4 tunnel TTL not specified.\n"); | |
1291 | return -EINVAL; | |
1292 | } | |
1b936472 | 1293 | } |
9b405f1a PS |
1294 | |
1295 | return 0; | |
1296 | } | |
1297 | ||
54cc3ec6 JG |
1298 | int ovs_ipv4_tun_to_nlattr(struct sk_buff *skb, |
1299 | const struct ovs_key_ipv4_tunnel *tun_key, | |
1300 | const struct ovs_key_ipv4_tunnel *output) | |
9b405f1a PS |
1301 | { |
1302 | struct nlattr *nla; | |
1303 | ||
1304 | nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL); | |
1305 | if (!nla) | |
1306 | return -EMSGSIZE; | |
1307 | ||
04b13268 | 1308 | if (output->tun_flags & TUNNEL_KEY && |
a1c564be | 1309 | nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id)) |
9b405f1a | 1310 | return -EMSGSIZE; |
04b13268 AZ |
1311 | if (output->ipv4_src && |
1312 | nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, output->ipv4_src)) | |
9b405f1a | 1313 | return -EMSGSIZE; |
04b13268 AZ |
1314 | if (output->ipv4_dst && |
1315 | nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST, output->ipv4_dst)) | |
9b405f1a | 1316 | return -EMSGSIZE; |
04b13268 AZ |
1317 | if (output->ipv4_tos && |
1318 | nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->ipv4_tos)) | |
9b405f1a | 1319 | return -EMSGSIZE; |
aa20ff9d | 1320 | if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ipv4_ttl)) |
9b405f1a | 1321 | return -EMSGSIZE; |
04b13268 | 1322 | if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) && |
9b405f1a PS |
1323 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT)) |
1324 | return -EMSGSIZE; | |
04b13268 | 1325 | if ((output->tun_flags & TUNNEL_CSUM) && |
9b405f1a PS |
1326 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM)) |
1327 | return -EMSGSIZE; | |
1328 | ||
1329 | nla_nest_end(skb, nla); | |
1330 | return 0; | |
1331 | } | |
1332 | ||
36956a7d | 1333 | |
a1c564be AZ |
1334 | static int metadata_from_nlattrs(struct sw_flow_match *match, u64 *attrs, |
1335 | const struct nlattr **a, bool is_mask) | |
1336 | { | |
1337 | if (*attrs & (1ULL << OVS_KEY_ATTR_PRIORITY)) { | |
1338 | SW_FLOW_KEY_PUT(match, phy.priority, | |
1339 | nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask); | |
1340 | *attrs &= ~(1ULL << OVS_KEY_ATTR_PRIORITY); | |
34118cae | 1341 | } |
a1c564be AZ |
1342 | |
1343 | if (*attrs & (1ULL << OVS_KEY_ATTR_IN_PORT)) { | |
34118cae | 1344 | u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]); |
a1c564be | 1345 | |
202c1051 AZ |
1346 | if (is_mask) |
1347 | in_port = 0xffffffff; /* Always exact match in_port. */ | |
1348 | else if (in_port >= DP_MAX_PORTS) | |
34118cae | 1349 | return -EINVAL; |
202c1051 | 1350 | |
a1c564be AZ |
1351 | SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask); |
1352 | *attrs &= ~(1ULL << OVS_KEY_ATTR_IN_PORT); | |
861687d4 JG |
1353 | } else if (!is_mask) { |
1354 | SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask); | |
34118cae | 1355 | } |
a1c564be AZ |
1356 | |
1357 | if (*attrs & (1ULL << OVS_KEY_ATTR_SKB_MARK)) { | |
72e8bf28 AA |
1358 | uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]); |
1359 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20) && !defined(CONFIG_NETFILTER) | |
1b936472 AZ |
1360 | if (!is_mask && mark != 0) { |
1361 | OVS_NLERR("skb->mark must be zero on this kernel (mark=%d).\n", mark); | |
72e8bf28 | 1362 | return -EINVAL; |
1b936472 | 1363 | } |
72e8bf28 | 1364 | #endif |
a1c564be AZ |
1365 | SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask); |
1366 | *attrs &= ~(1ULL << OVS_KEY_ATTR_SKB_MARK); | |
1367 | } | |
1368 | if (*attrs & (1ULL << OVS_KEY_ATTR_TUNNEL)) { | |
54cc3ec6 | 1369 | if (ovs_ipv4_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match, |
a1c564be AZ |
1370 | is_mask)) |
1371 | return -EINVAL; | |
1372 | *attrs &= ~(1ULL << OVS_KEY_ATTR_TUNNEL); | |
72e8bf28 | 1373 | } |
a1c564be AZ |
1374 | return 0; |
1375 | } | |
36956a7d | 1376 | |
a1c564be AZ |
1377 | static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs, |
1378 | const struct nlattr **a, bool is_mask) | |
1379 | { | |
1380 | int err; | |
828f5f64 | 1381 | u64 orig_attrs = attrs; |
5c7f5883 | 1382 | |
a1c564be AZ |
1383 | err = metadata_from_nlattrs(match, &attrs, a, is_mask); |
1384 | if (err) | |
1385 | return err; | |
76abe283 | 1386 | |
a1c564be AZ |
1387 | if (attrs & (1ULL << OVS_KEY_ATTR_ETHERNET)) { |
1388 | const struct ovs_key_ethernet *eth_key; | |
36956a7d | 1389 | |
a1c564be AZ |
1390 | eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]); |
1391 | SW_FLOW_KEY_MEMCPY(match, eth.src, | |
1392 | eth_key->eth_src, ETH_ALEN, is_mask); | |
1393 | SW_FLOW_KEY_MEMCPY(match, eth.dst, | |
1394 | eth_key->eth_dst, ETH_ALEN, is_mask); | |
1395 | attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERNET); | |
1396 | } | |
76abe283 | 1397 | |
a1c564be | 1398 | if (attrs & (1ULL << OVS_KEY_ATTR_VLAN)) { |
8ddc056d BP |
1399 | __be16 tci; |
1400 | ||
a1c564be | 1401 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); |
62f13eb2 AZ |
1402 | if (!(tci & htons(VLAN_TAG_PRESENT))) { |
1403 | if (is_mask) | |
1404 | OVS_NLERR("VLAN TCI mask does not have exact match for VLAN_TAG_PRESENT bit.\n"); | |
1405 | else | |
1b936472 | 1406 | OVS_NLERR("VLAN TCI does not have VLAN_TAG_PRESENT bit set.\n"); |
62f13eb2 AZ |
1407 | |
1408 | return -EINVAL; | |
1409 | } | |
36956a7d | 1410 | |
a1c564be AZ |
1411 | SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask); |
1412 | attrs &= ~(1ULL << OVS_KEY_ATTR_VLAN); | |
62f13eb2 AZ |
1413 | } else if (!is_mask) |
1414 | SW_FLOW_KEY_PUT(match, eth.tci, htons(0xffff), true); | |
8ddc056d | 1415 | |
a1c564be AZ |
1416 | if (attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)) { |
1417 | __be16 eth_type; | |
8ddc056d | 1418 | |
a1c564be | 1419 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); |
33fd9f59 AZ |
1420 | if (is_mask) { |
1421 | /* Always exact match EtherType. */ | |
1422 | eth_type = htons(0xffff); | |
1423 | } else if (ntohs(eth_type) < ETH_P_802_3_MIN) { | |
e821558d | 1424 | OVS_NLERR("EtherType is less than minimum (type=%x, min=%x).\n", |
1b936472 | 1425 | ntohs(eth_type), ETH_P_802_3_MIN); |
8ddc056d | 1426 | return -EINVAL; |
1b936472 | 1427 | } |
a1c564be AZ |
1428 | |
1429 | SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask); | |
1430 | attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE); | |
1431 | } else if (!is_mask) { | |
1432 | SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask); | |
34118cae BP |
1433 | } |
1434 | ||
a1c564be AZ |
1435 | if (attrs & (1ULL << OVS_KEY_ATTR_IPV4)) { |
1436 | const struct ovs_key_ipv4 *ipv4_key; | |
1437 | ||
1438 | ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]); | |
1b936472 AZ |
1439 | if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) { |
1440 | OVS_NLERR("Unknown IPv4 fragment type (value=%d, max=%d).\n", | |
1441 | ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX); | |
34118cae | 1442 | return -EINVAL; |
1b936472 | 1443 | } |
a1c564be AZ |
1444 | SW_FLOW_KEY_PUT(match, ip.proto, |
1445 | ipv4_key->ipv4_proto, is_mask); | |
1446 | SW_FLOW_KEY_PUT(match, ip.tos, | |
1447 | ipv4_key->ipv4_tos, is_mask); | |
1448 | SW_FLOW_KEY_PUT(match, ip.ttl, | |
1449 | ipv4_key->ipv4_ttl, is_mask); | |
1450 | SW_FLOW_KEY_PUT(match, ip.frag, | |
1451 | ipv4_key->ipv4_frag, is_mask); | |
1452 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, | |
1453 | ipv4_key->ipv4_src, is_mask); | |
1454 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, | |
1455 | ipv4_key->ipv4_dst, is_mask); | |
1456 | attrs &= ~(1ULL << OVS_KEY_ATTR_IPV4); | |
34118cae BP |
1457 | } |
1458 | ||
a1c564be AZ |
1459 | if (attrs & (1ULL << OVS_KEY_ATTR_IPV6)) { |
1460 | const struct ovs_key_ipv6 *ipv6_key; | |
685a51a5 | 1461 | |
a1c564be | 1462 | ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]); |
1b936472 AZ |
1463 | if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) { |
1464 | OVS_NLERR("Unknown IPv6 fragment type (value=%d, max=%d).\n", | |
1465 | ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX); | |
34118cae | 1466 | return -EINVAL; |
1b936472 | 1467 | } |
a1c564be AZ |
1468 | SW_FLOW_KEY_PUT(match, ipv6.label, |
1469 | ipv6_key->ipv6_label, is_mask); | |
1470 | SW_FLOW_KEY_PUT(match, ip.proto, | |
1471 | ipv6_key->ipv6_proto, is_mask); | |
1472 | SW_FLOW_KEY_PUT(match, ip.tos, | |
1473 | ipv6_key->ipv6_tclass, is_mask); | |
1474 | SW_FLOW_KEY_PUT(match, ip.ttl, | |
1475 | ipv6_key->ipv6_hlimit, is_mask); | |
1476 | SW_FLOW_KEY_PUT(match, ip.frag, | |
1477 | ipv6_key->ipv6_frag, is_mask); | |
1478 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src, | |
1479 | ipv6_key->ipv6_src, | |
1480 | sizeof(match->key->ipv6.addr.src), | |
1481 | is_mask); | |
1482 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst, | |
1483 | ipv6_key->ipv6_dst, | |
1484 | sizeof(match->key->ipv6.addr.dst), | |
1485 | is_mask); | |
1486 | ||
1487 | attrs &= ~(1ULL << OVS_KEY_ATTR_IPV6); | |
1488 | } | |
34118cae | 1489 | |
a1c564be AZ |
1490 | if (attrs & (1ULL << OVS_KEY_ATTR_ARP)) { |
1491 | const struct ovs_key_arp *arp_key; | |
1492 | ||
1493 | arp_key = nla_data(a[OVS_KEY_ATTR_ARP]); | |
1b936472 AZ |
1494 | if (!is_mask && (arp_key->arp_op & htons(0xff00))) { |
1495 | OVS_NLERR("Unknown ARP opcode (opcode=%d).\n", | |
1496 | arp_key->arp_op); | |
34118cae | 1497 | return -EINVAL; |
1b936472 | 1498 | } |
a1c564be AZ |
1499 | |
1500 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, | |
1501 | arp_key->arp_sip, is_mask); | |
1502 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, | |
1503 | arp_key->arp_tip, is_mask); | |
1504 | SW_FLOW_KEY_PUT(match, ip.proto, | |
1505 | ntohs(arp_key->arp_op), is_mask); | |
1506 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha, | |
1507 | arp_key->arp_sha, ETH_ALEN, is_mask); | |
1508 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha, | |
1509 | arp_key->arp_tha, ETH_ALEN, is_mask); | |
1510 | ||
1511 | attrs &= ~(1ULL << OVS_KEY_ATTR_ARP); | |
1512 | } | |
1513 | ||
1514 | if (attrs & (1ULL << OVS_KEY_ATTR_TCP)) { | |
1515 | const struct ovs_key_tcp *tcp_key; | |
1516 | ||
1517 | tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]); | |
828f5f64 JP |
1518 | if (orig_attrs & (1ULL << OVS_KEY_ATTR_IPV4)) { |
1519 | SW_FLOW_KEY_PUT(match, ipv4.tp.src, | |
1520 | tcp_key->tcp_src, is_mask); | |
1521 | SW_FLOW_KEY_PUT(match, ipv4.tp.dst, | |
1522 | tcp_key->tcp_dst, is_mask); | |
1523 | } else { | |
1524 | SW_FLOW_KEY_PUT(match, ipv6.tp.src, | |
1525 | tcp_key->tcp_src, is_mask); | |
1526 | SW_FLOW_KEY_PUT(match, ipv6.tp.dst, | |
1527 | tcp_key->tcp_dst, is_mask); | |
1528 | } | |
a1c564be AZ |
1529 | attrs &= ~(1ULL << OVS_KEY_ATTR_TCP); |
1530 | } | |
1531 | ||
1532 | if (attrs & (1ULL << OVS_KEY_ATTR_UDP)) { | |
1533 | const struct ovs_key_udp *udp_key; | |
1534 | ||
1535 | udp_key = nla_data(a[OVS_KEY_ATTR_UDP]); | |
828f5f64 JP |
1536 | if (orig_attrs & (1ULL << OVS_KEY_ATTR_IPV4)) { |
1537 | SW_FLOW_KEY_PUT(match, ipv4.tp.src, | |
1538 | udp_key->udp_src, is_mask); | |
1539 | SW_FLOW_KEY_PUT(match, ipv4.tp.dst, | |
1540 | udp_key->udp_dst, is_mask); | |
1541 | } else { | |
1542 | SW_FLOW_KEY_PUT(match, ipv6.tp.src, | |
1543 | udp_key->udp_src, is_mask); | |
1544 | SW_FLOW_KEY_PUT(match, ipv6.tp.dst, | |
1545 | udp_key->udp_dst, is_mask); | |
1546 | } | |
a1c564be AZ |
1547 | attrs &= ~(1ULL << OVS_KEY_ATTR_UDP); |
1548 | } | |
1549 | ||
10f72e3d JS |
1550 | if (attrs & (1ULL << OVS_KEY_ATTR_SCTP)) { |
1551 | const struct ovs_key_sctp *sctp_key; | |
1552 | ||
1553 | sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]); | |
1554 | if (orig_attrs & (1ULL << OVS_KEY_ATTR_IPV4)) { | |
1555 | SW_FLOW_KEY_PUT(match, ipv4.tp.src, | |
1556 | sctp_key->sctp_src, is_mask); | |
1557 | SW_FLOW_KEY_PUT(match, ipv4.tp.dst, | |
1558 | sctp_key->sctp_dst, is_mask); | |
1559 | } else { | |
1560 | SW_FLOW_KEY_PUT(match, ipv6.tp.src, | |
1561 | sctp_key->sctp_src, is_mask); | |
1562 | SW_FLOW_KEY_PUT(match, ipv6.tp.dst, | |
1563 | sctp_key->sctp_dst, is_mask); | |
1564 | } | |
1565 | attrs &= ~(1ULL << OVS_KEY_ATTR_SCTP); | |
1566 | } | |
1567 | ||
a1c564be AZ |
1568 | if (attrs & (1ULL << OVS_KEY_ATTR_ICMP)) { |
1569 | const struct ovs_key_icmp *icmp_key; | |
1570 | ||
1571 | icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]); | |
1572 | SW_FLOW_KEY_PUT(match, ipv4.tp.src, | |
1573 | htons(icmp_key->icmp_type), is_mask); | |
1574 | SW_FLOW_KEY_PUT(match, ipv4.tp.dst, | |
1575 | htons(icmp_key->icmp_code), is_mask); | |
1576 | attrs &= ~(1ULL << OVS_KEY_ATTR_ICMP); | |
1577 | } | |
1578 | ||
1579 | if (attrs & (1ULL << OVS_KEY_ATTR_ICMPV6)) { | |
1580 | const struct ovs_key_icmpv6 *icmpv6_key; | |
1581 | ||
1582 | icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]); | |
1583 | SW_FLOW_KEY_PUT(match, ipv6.tp.src, | |
1584 | htons(icmpv6_key->icmpv6_type), is_mask); | |
1585 | SW_FLOW_KEY_PUT(match, ipv6.tp.dst, | |
1586 | htons(icmpv6_key->icmpv6_code), is_mask); | |
1587 | attrs &= ~(1ULL << OVS_KEY_ATTR_ICMPV6); | |
1588 | } | |
1589 | ||
1590 | if (attrs & (1ULL << OVS_KEY_ATTR_ND)) { | |
1591 | const struct ovs_key_nd *nd_key; | |
1592 | ||
1593 | nd_key = nla_data(a[OVS_KEY_ATTR_ND]); | |
1594 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target, | |
1595 | nd_key->nd_target, | |
1596 | sizeof(match->key->ipv6.nd.target), | |
1597 | is_mask); | |
1598 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll, | |
1599 | nd_key->nd_sll, ETH_ALEN, is_mask); | |
1600 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll, | |
1601 | nd_key->nd_tll, ETH_ALEN, is_mask); | |
1602 | attrs &= ~(1ULL << OVS_KEY_ATTR_ND); | |
1603 | } | |
1604 | ||
1605 | if (attrs != 0) | |
1606 | return -EINVAL; | |
1607 | ||
1608 | return 0; | |
1609 | } | |
1610 | ||
1611 | /** | |
1612 | * ovs_match_from_nlattrs - parses Netlink attributes into a flow key and | |
1613 | * mask. In case the 'mask' is NULL, the flow is treated as exact match | |
1614 | * flow. Otherwise, it is treated as a wildcarded flow, except the mask | |
1615 | * does not include any don't care bit. | |
1616 | * @match: receives the extracted flow match information. | |
1617 | * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute | |
1618 | * sequence. The fields should of the packet that triggered the creation | |
1619 | * of this flow. | |
1620 | * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink | |
1621 | * attribute specifies the mask field of the wildcarded flow. | |
1622 | */ | |
1623 | int ovs_match_from_nlattrs(struct sw_flow_match *match, | |
1624 | const struct nlattr *key, | |
1625 | const struct nlattr *mask) | |
1626 | { | |
1627 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; | |
a1c564be AZ |
1628 | const struct nlattr *encap; |
1629 | u64 key_attrs = 0; | |
1630 | u64 mask_attrs = 0; | |
1631 | bool encap_valid = false; | |
1632 | int err; | |
1633 | ||
1634 | err = parse_flow_nlattrs(key, a, &key_attrs); | |
1635 | if (err) | |
1636 | return err; | |
1637 | ||
1638 | if (key_attrs & 1ULL << OVS_KEY_ATTR_ENCAP) { | |
1639 | encap = a[OVS_KEY_ATTR_ENCAP]; | |
1640 | key_attrs &= ~(1ULL << OVS_KEY_ATTR_ENCAP); | |
1641 | if (nla_len(encap)) { | |
1642 | __be16 eth_type = 0; /* ETH_P_8021Q */ | |
1643 | ||
1644 | if (a[OVS_KEY_ATTR_ETHERTYPE]) | |
1645 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
1646 | ||
1647 | if ((eth_type == htons(ETH_P_8021Q)) && (a[OVS_KEY_ATTR_VLAN])) { | |
1648 | encap_valid = true; | |
1649 | key_attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE); | |
1650 | err = parse_flow_nlattrs(encap, a, &key_attrs); | |
1b936472 AZ |
1651 | } else { |
1652 | OVS_NLERR("Encap attribute is set for a non-VLAN frame.\n"); | |
a1c564be | 1653 | err = -EINVAL; |
1b936472 | 1654 | } |
a1c564be | 1655 | |
34118cae BP |
1656 | if (err) |
1657 | return err; | |
36956a7d | 1658 | } |
a1c564be | 1659 | } |
36956a7d | 1660 | |
a1c564be AZ |
1661 | err = ovs_key_from_nlattrs(match, key_attrs, a, false); |
1662 | if (err) | |
1663 | return err; | |
1664 | ||
1665 | if (mask) { | |
1a02b768 | 1666 | err = parse_flow_mask_nlattrs(mask, a, &mask_attrs); |
a1c564be AZ |
1667 | if (err) |
1668 | return err; | |
1669 | ||
1670 | if ((mask_attrs & 1ULL << OVS_KEY_ATTR_ENCAP) && encap_valid) { | |
1671 | __be16 eth_type = 0; | |
1672 | ||
063236f1 | 1673 | mask_attrs &= ~(1ULL << OVS_KEY_ATTR_ENCAP); |
1a02b768 JG |
1674 | if (a[OVS_KEY_ATTR_ETHERTYPE]) |
1675 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
a1c564be AZ |
1676 | if (eth_type == htons(0xffff)) { |
1677 | mask_attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE); | |
1a02b768 JG |
1678 | encap = a[OVS_KEY_ATTR_ENCAP]; |
1679 | err = parse_flow_mask_nlattrs(encap, a, &mask_attrs); | |
1b936472 AZ |
1680 | } else { |
1681 | OVS_NLERR("VLAN frames must have an exact match" | |
1682 | " on the TPID (mask=%x).\n", | |
1683 | ntohs(eth_type)); | |
a1c564be | 1684 | err = -EINVAL; |
1b936472 | 1685 | } |
34118cae | 1686 | |
34118cae BP |
1687 | if (err) |
1688 | return err; | |
1689 | } | |
36956a7d | 1690 | |
1a02b768 | 1691 | err = ovs_key_from_nlattrs(match, mask_attrs, a, true); |
a1c564be AZ |
1692 | if (err) |
1693 | return err; | |
1694 | } else { | |
1695 | /* Populate exact match flow's key mask. */ | |
1696 | if (match->mask) | |
1697 | ovs_sw_flow_mask_set(match->mask, &match->range, 0xff); | |
34118cae | 1698 | } |
76abe283 | 1699 | |
a1c564be | 1700 | if (!ovs_match_validate(match, key_attrs, mask_attrs)) |
34118cae | 1701 | return -EINVAL; |
34118cae BP |
1702 | |
1703 | return 0; | |
36956a7d BP |
1704 | } |
1705 | ||
80e5eed9 | 1706 | /** |
850b6b3b | 1707 | * ovs_flow_metadata_from_nlattrs - parses Netlink attributes into a flow key. |
c3b36027 | 1708 | * @flow: Receives extracted in_port, priority, tun_key and skb_mark. |
c3b36027 | 1709 | * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute |
80e5eed9 BP |
1710 | * sequence. |
1711 | * | |
1712 | * This parses a series of Netlink attributes that form a flow key, which must | |
1713 | * take the same form accepted by flow_from_nlattrs(), but only enough of it to | |
1714 | * get the metadata, that is, the parts of the flow key that cannot be | |
1715 | * extracted from the packet itself. | |
1716 | */ | |
13e24889 | 1717 | |
a1c564be AZ |
1718 | int ovs_flow_metadata_from_nlattrs(struct sw_flow *flow, |
1719 | const struct nlattr *attr) | |
80e5eed9 | 1720 | { |
6694e498 | 1721 | struct ovs_key_ipv4_tunnel *tun_key = &flow->key.tun_key; |
a1c564be AZ |
1722 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; |
1723 | u64 attrs = 0; | |
1724 | int err; | |
1725 | struct sw_flow_match match; | |
80e5eed9 | 1726 | |
13e24889 PS |
1727 | flow->key.phy.in_port = DP_MAX_PORTS; |
1728 | flow->key.phy.priority = 0; | |
72e8bf28 | 1729 | flow->key.phy.skb_mark = 0; |
6694e498 | 1730 | memset(tun_key, 0, sizeof(flow->key.tun_key)); |
80e5eed9 | 1731 | |
a1c564be AZ |
1732 | err = parse_flow_nlattrs(attr, a, &attrs); |
1733 | if (err) | |
80e5eed9 | 1734 | return -EINVAL; |
13e24889 | 1735 | |
46d4c97f JG |
1736 | memset(&match, 0, sizeof(match)); |
1737 | match.key = &flow->key; | |
a1c564be AZ |
1738 | |
1739 | err = metadata_from_nlattrs(&match, &attrs, a, false); | |
1740 | if (err) | |
1741 | return err; | |
13e24889 | 1742 | |
80e5eed9 BP |
1743 | return 0; |
1744 | } | |
1745 | ||
a1c564be AZ |
1746 | int ovs_flow_to_nlattrs(const struct sw_flow_key *swkey, |
1747 | const struct sw_flow_key *output, struct sk_buff *skb) | |
36956a7d | 1748 | { |
df2c07f4 | 1749 | struct ovs_key_ethernet *eth_key; |
fea393b1 | 1750 | struct nlattr *nla, *encap; |
a583e032 | 1751 | bool is_mask = (swkey != output); |
36956a7d | 1752 | |
dd62b991 | 1753 | if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority)) |
c3cc8c03 | 1754 | goto nla_put_failure; |
18c43631 | 1755 | |
01fcdfc6 | 1756 | if ((swkey->tun_key.ipv4_dst || is_mask) && |
54cc3ec6 | 1757 | ovs_ipv4_tun_to_nlattr(skb, &swkey->tun_key, &output->tun_key)) |
9b405f1a PS |
1758 | goto nla_put_failure; |
1759 | ||
04b13268 | 1760 | if (swkey->phy.in_port == DP_MAX_PORTS) { |
a583e032 | 1761 | if (is_mask && (output->phy.in_port == 0xffff)) |
04b13268 AZ |
1762 | if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff)) |
1763 | goto nla_put_failure; | |
1764 | } else { | |
a1c564be | 1765 | u16 upper_u16; |
a583e032 | 1766 | upper_u16 = !is_mask ? 0 : 0xffff; |
a1c564be AZ |
1767 | |
1768 | if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, | |
04b13268 | 1769 | (upper_u16 << 16) | output->phy.in_port)) |
a1c564be AZ |
1770 | goto nla_put_failure; |
1771 | } | |
36956a7d | 1772 | |
dd62b991 | 1773 | if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark)) |
72e8bf28 AA |
1774 | goto nla_put_failure; |
1775 | ||
df2c07f4 | 1776 | nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key)); |
d6569377 BP |
1777 | if (!nla) |
1778 | goto nla_put_failure; | |
a1c564be | 1779 | |
d6569377 | 1780 | eth_key = nla_data(nla); |
a1c564be AZ |
1781 | memcpy(eth_key->eth_src, output->eth.src, ETH_ALEN); |
1782 | memcpy(eth_key->eth_dst, output->eth.dst, ETH_ALEN); | |
36956a7d | 1783 | |
8ddc056d | 1784 | if (swkey->eth.tci || swkey->eth.type == htons(ETH_P_8021Q)) { |
a1c564be | 1785 | __be16 eth_type; |
a583e032 | 1786 | eth_type = !is_mask ? htons(ETH_P_8021Q) : htons(0xffff); |
a1c564be AZ |
1787 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) || |
1788 | nla_put_be16(skb, OVS_KEY_ATTR_VLAN, output->eth.tci)) | |
c3cc8c03 | 1789 | goto nla_put_failure; |
fea393b1 | 1790 | encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP); |
8ddc056d BP |
1791 | if (!swkey->eth.tci) |
1792 | goto unencap; | |
a1c564be | 1793 | } else |
fea393b1 | 1794 | encap = NULL; |
36956a7d | 1795 | |
04b13268 AZ |
1796 | if (swkey->eth.type == htons(ETH_P_802_2)) { |
1797 | /* | |
1798 | * Ethertype 802.2 is represented in the netlink with omitted | |
1799 | * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and | |
1800 | * 0xffff in the mask attribute. Ethertype can also | |
1801 | * be wildcarded. | |
1802 | */ | |
a583e032 | 1803 | if (is_mask && output->eth.type) |
04b13268 AZ |
1804 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, |
1805 | output->eth.type)) | |
1806 | goto nla_put_failure; | |
fea393b1 | 1807 | goto unencap; |
04b13268 | 1808 | } |
36956a7d | 1809 | |
04b13268 AZ |
1810 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type)) |
1811 | goto nla_put_failure; | |
36956a7d | 1812 | |
76abe283 | 1813 | if (swkey->eth.type == htons(ETH_P_IP)) { |
df2c07f4 | 1814 | struct ovs_key_ipv4 *ipv4_key; |
36956a7d | 1815 | |
df2c07f4 | 1816 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key)); |
d6569377 BP |
1817 | if (!nla) |
1818 | goto nla_put_failure; | |
1819 | ipv4_key = nla_data(nla); | |
a1c564be AZ |
1820 | ipv4_key->ipv4_src = output->ipv4.addr.src; |
1821 | ipv4_key->ipv4_dst = output->ipv4.addr.dst; | |
1822 | ipv4_key->ipv4_proto = output->ip.proto; | |
1823 | ipv4_key->ipv4_tos = output->ip.tos; | |
1824 | ipv4_key->ipv4_ttl = output->ip.ttl; | |
1825 | ipv4_key->ipv4_frag = output->ip.frag; | |
76abe283 | 1826 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { |
df2c07f4 | 1827 | struct ovs_key_ipv6 *ipv6_key; |
d31f1109 | 1828 | |
df2c07f4 | 1829 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key)); |
d31f1109 JP |
1830 | if (!nla) |
1831 | goto nla_put_failure; | |
1832 | ipv6_key = nla_data(nla); | |
a1c564be | 1833 | memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src, |
d31f1109 | 1834 | sizeof(ipv6_key->ipv6_src)); |
a1c564be | 1835 | memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst, |
d31f1109 | 1836 | sizeof(ipv6_key->ipv6_dst)); |
a1c564be AZ |
1837 | ipv6_key->ipv6_label = output->ipv6.label; |
1838 | ipv6_key->ipv6_proto = output->ip.proto; | |
1839 | ipv6_key->ipv6_tclass = output->ip.tos; | |
1840 | ipv6_key->ipv6_hlimit = output->ip.ttl; | |
1841 | ipv6_key->ipv6_frag = output->ip.frag; | |
8087f5ff MM |
1842 | } else if (swkey->eth.type == htons(ETH_P_ARP) || |
1843 | swkey->eth.type == htons(ETH_P_RARP)) { | |
df2c07f4 | 1844 | struct ovs_key_arp *arp_key; |
d31f1109 | 1845 | |
df2c07f4 | 1846 | nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key)); |
d31f1109 JP |
1847 | if (!nla) |
1848 | goto nla_put_failure; | |
1849 | arp_key = nla_data(nla); | |
df2c07f4 | 1850 | memset(arp_key, 0, sizeof(struct ovs_key_arp)); |
a1c564be AZ |
1851 | arp_key->arp_sip = output->ipv4.addr.src; |
1852 | arp_key->arp_tip = output->ipv4.addr.dst; | |
1853 | arp_key->arp_op = htons(output->ip.proto); | |
1854 | memcpy(arp_key->arp_sha, output->ipv4.arp.sha, ETH_ALEN); | |
1855 | memcpy(arp_key->arp_tha, output->ipv4.arp.tha, ETH_ALEN); | |
d31f1109 JP |
1856 | } |
1857 | ||
7257b535 BP |
1858 | if ((swkey->eth.type == htons(ETH_P_IP) || |
1859 | swkey->eth.type == htons(ETH_P_IPV6)) && | |
9e44d715 | 1860 | swkey->ip.frag != OVS_FRAG_TYPE_LATER) { |
36956a7d | 1861 | |
28bad473 | 1862 | if (swkey->ip.proto == IPPROTO_TCP) { |
df2c07f4 | 1863 | struct ovs_key_tcp *tcp_key; |
36956a7d | 1864 | |
df2c07f4 | 1865 | nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key)); |
d6569377 BP |
1866 | if (!nla) |
1867 | goto nla_put_failure; | |
1868 | tcp_key = nla_data(nla); | |
76abe283 | 1869 | if (swkey->eth.type == htons(ETH_P_IP)) { |
a1c564be AZ |
1870 | tcp_key->tcp_src = output->ipv4.tp.src; |
1871 | tcp_key->tcp_dst = output->ipv4.tp.dst; | |
76abe283 | 1872 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { |
a1c564be AZ |
1873 | tcp_key->tcp_src = output->ipv6.tp.src; |
1874 | tcp_key->tcp_dst = output->ipv6.tp.dst; | |
76abe283 | 1875 | } |
28bad473 | 1876 | } else if (swkey->ip.proto == IPPROTO_UDP) { |
df2c07f4 | 1877 | struct ovs_key_udp *udp_key; |
36956a7d | 1878 | |
df2c07f4 | 1879 | nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key)); |
d6569377 BP |
1880 | if (!nla) |
1881 | goto nla_put_failure; | |
1882 | udp_key = nla_data(nla); | |
76abe283 | 1883 | if (swkey->eth.type == htons(ETH_P_IP)) { |
a1c564be AZ |
1884 | udp_key->udp_src = output->ipv4.tp.src; |
1885 | udp_key->udp_dst = output->ipv4.tp.dst; | |
76abe283 | 1886 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { |
a1c564be AZ |
1887 | udp_key->udp_src = output->ipv6.tp.src; |
1888 | udp_key->udp_dst = output->ipv6.tp.dst; | |
76abe283 | 1889 | } |
10f72e3d JS |
1890 | } else if (swkey->ip.proto == IPPROTO_SCTP) { |
1891 | struct ovs_key_sctp *sctp_key; | |
1892 | ||
1893 | nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key)); | |
1894 | if (!nla) | |
1895 | goto nla_put_failure; | |
1896 | sctp_key = nla_data(nla); | |
1897 | if (swkey->eth.type == htons(ETH_P_IP)) { | |
1898 | sctp_key->sctp_src = swkey->ipv4.tp.src; | |
1899 | sctp_key->sctp_dst = swkey->ipv4.tp.dst; | |
1900 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { | |
1901 | sctp_key->sctp_src = swkey->ipv6.tp.src; | |
1902 | sctp_key->sctp_dst = swkey->ipv6.tp.dst; | |
1903 | } | |
76abe283 | 1904 | } else if (swkey->eth.type == htons(ETH_P_IP) && |
28bad473 | 1905 | swkey->ip.proto == IPPROTO_ICMP) { |
df2c07f4 | 1906 | struct ovs_key_icmp *icmp_key; |
36956a7d | 1907 | |
df2c07f4 | 1908 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key)); |
d6569377 BP |
1909 | if (!nla) |
1910 | goto nla_put_failure; | |
1911 | icmp_key = nla_data(nla); | |
a1c564be AZ |
1912 | icmp_key->icmp_type = ntohs(output->ipv4.tp.src); |
1913 | icmp_key->icmp_code = ntohs(output->ipv4.tp.dst); | |
76abe283 | 1914 | } else if (swkey->eth.type == htons(ETH_P_IPV6) && |
28bad473 | 1915 | swkey->ip.proto == IPPROTO_ICMPV6) { |
df2c07f4 | 1916 | struct ovs_key_icmpv6 *icmpv6_key; |
36956a7d | 1917 | |
df2c07f4 | 1918 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6, |
bfef4717 | 1919 | sizeof(*icmpv6_key)); |
d31f1109 JP |
1920 | if (!nla) |
1921 | goto nla_put_failure; | |
1922 | icmpv6_key = nla_data(nla); | |
a1c564be AZ |
1923 | icmpv6_key->icmpv6_type = ntohs(output->ipv6.tp.src); |
1924 | icmpv6_key->icmpv6_code = ntohs(output->ipv6.tp.dst); | |
685a51a5 | 1925 | |
bfef4717 JG |
1926 | if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION || |
1927 | icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) { | |
df2c07f4 | 1928 | struct ovs_key_nd *nd_key; |
685a51a5 | 1929 | |
df2c07f4 | 1930 | nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key)); |
685a51a5 JP |
1931 | if (!nla) |
1932 | goto nla_put_failure; | |
1933 | nd_key = nla_data(nla); | |
a1c564be | 1934 | memcpy(nd_key->nd_target, &output->ipv6.nd.target, |
685a51a5 | 1935 | sizeof(nd_key->nd_target)); |
a1c564be AZ |
1936 | memcpy(nd_key->nd_sll, output->ipv6.nd.sll, ETH_ALEN); |
1937 | memcpy(nd_key->nd_tll, output->ipv6.nd.tll, ETH_ALEN); | |
685a51a5 | 1938 | } |
d31f1109 | 1939 | } |
36956a7d BP |
1940 | } |
1941 | ||
fea393b1 BP |
1942 | unencap: |
1943 | if (encap) | |
1944 | nla_nest_end(skb, encap); | |
1945 | ||
d6569377 | 1946 | return 0; |
36956a7d | 1947 | |
d6569377 BP |
1948 | nla_put_failure: |
1949 | return -EMSGSIZE; | |
8d5ebd83 JG |
1950 | } |
1951 | ||
064af421 BP |
1952 | /* Initializes the flow module. |
1953 | * Returns zero if successful or a negative error code. */ | |
850b6b3b | 1954 | int ovs_flow_init(void) |
064af421 BP |
1955 | { |
1956 | flow_cache = kmem_cache_create("sw_flow", sizeof(struct sw_flow), 0, | |
1957 | 0, NULL); | |
1958 | if (flow_cache == NULL) | |
1959 | return -ENOMEM; | |
1960 | ||
1961 | return 0; | |
1962 | } | |
1963 | ||
1964 | /* Uninitializes the flow module. */ | |
850b6b3b | 1965 | void ovs_flow_exit(void) |
064af421 BP |
1966 | { |
1967 | kmem_cache_destroy(flow_cache); | |
1968 | } | |
a1c564be AZ |
1969 | |
1970 | struct sw_flow_mask *ovs_sw_flow_mask_alloc(void) | |
1971 | { | |
1972 | struct sw_flow_mask *mask; | |
1973 | ||
1974 | mask = kmalloc(sizeof(*mask), GFP_KERNEL); | |
1975 | if (mask) | |
1976 | mask->ref_count = 0; | |
1977 | ||
1978 | return mask; | |
1979 | } | |
1980 | ||
1981 | void ovs_sw_flow_mask_add_ref(struct sw_flow_mask *mask) | |
1982 | { | |
1983 | mask->ref_count++; | |
1984 | } | |
1985 | ||
1986 | static void rcu_free_sw_flow_mask_cb(struct rcu_head *rcu) | |
1987 | { | |
1988 | struct sw_flow_mask *mask = container_of(rcu, struct sw_flow_mask, rcu); | |
1989 | ||
1990 | kfree(mask); | |
1991 | } | |
1992 | ||
1993 | void ovs_sw_flow_mask_del_ref(struct sw_flow_mask *mask, bool deferred) | |
1994 | { | |
1995 | if (!mask) | |
1996 | return; | |
1997 | ||
1998 | BUG_ON(!mask->ref_count); | |
1999 | mask->ref_count--; | |
2000 | ||
2001 | if (!mask->ref_count) { | |
2002 | list_del_rcu(&mask->list); | |
2003 | if (deferred) | |
2004 | call_rcu(&mask->rcu, rcu_free_sw_flow_mask_cb); | |
2005 | else | |
2006 | kfree(mask); | |
2007 | } | |
2008 | } | |
2009 | ||
2010 | static bool ovs_sw_flow_mask_equal(const struct sw_flow_mask *a, | |
2011 | const struct sw_flow_mask *b) | |
2012 | { | |
2013 | u8 *a_ = (u8 *)&a->key + a->range.start; | |
2014 | u8 *b_ = (u8 *)&b->key + b->range.start; | |
2015 | ||
2016 | return (a->range.end == b->range.end) | |
2017 | && (a->range.start == b->range.start) | |
2018 | && (memcmp(a_, b_, ovs_sw_flow_mask_actual_size(a)) == 0); | |
2019 | } | |
2020 | ||
2021 | struct sw_flow_mask *ovs_sw_flow_mask_find(const struct flow_table *tbl, | |
2022 | const struct sw_flow_mask *mask) | |
2023 | { | |
2024 | struct list_head *ml; | |
2025 | ||
ede77a46 | 2026 | list_for_each(ml, tbl->mask_list) { |
a1c564be AZ |
2027 | struct sw_flow_mask *m; |
2028 | m = container_of(ml, struct sw_flow_mask, list); | |
2029 | if (ovs_sw_flow_mask_equal(mask, m)) | |
2030 | return m; | |
2031 | } | |
2032 | ||
2033 | return NULL; | |
2034 | } | |
2035 | ||
2036 | /** | |
2037 | * add a new mask into the mask list. | |
2038 | * The caller needs to make sure that 'mask' is not the same | |
2039 | * as any masks that are already on the list. | |
2040 | */ | |
2041 | void ovs_sw_flow_mask_insert(struct flow_table *tbl, struct sw_flow_mask *mask) | |
2042 | { | |
ede77a46 | 2043 | list_add_rcu(&mask->list, tbl->mask_list); |
a1c564be AZ |
2044 | } |
2045 | ||
2046 | /** | |
2047 | * Set 'range' fields in the mask to the value of 'val'. | |
2048 | */ | |
2049 | static void ovs_sw_flow_mask_set(struct sw_flow_mask *mask, | |
2050 | struct sw_flow_key_range *range, u8 val) | |
2051 | { | |
2052 | u8 *m = (u8 *)&mask->key + range->start; | |
2053 | ||
2054 | mask->range = *range; | |
2055 | memset(m, val, ovs_sw_flow_mask_size_roundup(mask)); | |
2056 | } |