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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; | |
c2dd5e99 AZ |
58 | size_t start = rounddown(offset, sizeof(long)); |
59 | size_t end = roundup(offset + size, sizeof(long)); | |
a1c564be AZ |
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 | ||
c2dd5e99 AZ |
106 | static u16 range_n_bytes(const struct sw_flow_key_range *range) |
107 | { | |
108 | return range->end - range->start; | |
109 | } | |
110 | ||
a1c564be AZ |
111 | void ovs_match_init(struct sw_flow_match *match, |
112 | struct sw_flow_key *key, | |
113 | struct sw_flow_mask *mask) | |
114 | { | |
115 | memset(match, 0, sizeof(*match)); | |
116 | match->key = key; | |
117 | match->mask = mask; | |
118 | ||
119 | memset(key, 0, sizeof(*key)); | |
120 | ||
121 | if (mask) { | |
122 | memset(&mask->key, 0, sizeof(mask->key)); | |
123 | mask->range.start = mask->range.end = 0; | |
124 | } | |
125 | } | |
126 | ||
127 | static bool ovs_match_validate(const struct sw_flow_match *match, | |
128 | u64 key_attrs, u64 mask_attrs) | |
129 | { | |
130 | u64 key_expected = 1ULL << OVS_KEY_ATTR_ETHERNET; | |
131 | u64 mask_allowed = key_attrs; /* At most allow all key attributes */ | |
132 | ||
133 | /* The following mask attributes allowed only if they | |
134 | * pass the validation tests. */ | |
135 | mask_allowed &= ~((1ULL << OVS_KEY_ATTR_IPV4) | |
136 | | (1ULL << OVS_KEY_ATTR_IPV6) | |
137 | | (1ULL << OVS_KEY_ATTR_TCP) | |
138 | | (1ULL << OVS_KEY_ATTR_UDP) | |
10f72e3d | 139 | | (1ULL << OVS_KEY_ATTR_SCTP) |
a1c564be AZ |
140 | | (1ULL << OVS_KEY_ATTR_ICMP) |
141 | | (1ULL << OVS_KEY_ATTR_ICMPV6) | |
142 | | (1ULL << OVS_KEY_ATTR_ARP) | |
143 | | (1ULL << OVS_KEY_ATTR_ND)); | |
144 | ||
202c1051 AZ |
145 | /* Always allowed mask fields. */ |
146 | mask_allowed |= ((1ULL << OVS_KEY_ATTR_TUNNEL) | |
33fd9f59 | 147 | | (1ULL << OVS_KEY_ATTR_IN_PORT) |
6273244a | 148 | | (1ULL << OVS_KEY_ATTR_ETHERTYPE)); |
a1c564be AZ |
149 | |
150 | /* Check key attributes. */ | |
151 | if (match->key->eth.type == htons(ETH_P_ARP) | |
152 | || match->key->eth.type == htons(ETH_P_RARP)) { | |
153 | key_expected |= 1ULL << OVS_KEY_ATTR_ARP; | |
154 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
155 | mask_allowed |= 1ULL << OVS_KEY_ATTR_ARP; | |
156 | } | |
157 | ||
158 | if (match->key->eth.type == htons(ETH_P_IP)) { | |
159 | key_expected |= 1ULL << OVS_KEY_ATTR_IPV4; | |
160 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
161 | mask_allowed |= 1ULL << OVS_KEY_ATTR_IPV4; | |
162 | ||
163 | if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { | |
164 | if (match->key->ip.proto == IPPROTO_UDP) { | |
165 | key_expected |= 1ULL << OVS_KEY_ATTR_UDP; | |
166 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
167 | mask_allowed |= 1ULL << OVS_KEY_ATTR_UDP; | |
168 | } | |
169 | ||
10f72e3d JS |
170 | if (match->key->ip.proto == IPPROTO_SCTP) { |
171 | key_expected |= 1ULL << OVS_KEY_ATTR_SCTP; | |
172 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
173 | mask_allowed |= 1ULL << OVS_KEY_ATTR_SCTP; | |
174 | } | |
175 | ||
a1c564be AZ |
176 | if (match->key->ip.proto == IPPROTO_TCP) { |
177 | key_expected |= 1ULL << OVS_KEY_ATTR_TCP; | |
178 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
179 | mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP; | |
180 | } | |
181 | ||
182 | if (match->key->ip.proto == IPPROTO_ICMP) { | |
183 | key_expected |= 1ULL << OVS_KEY_ATTR_ICMP; | |
184 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
185 | mask_allowed |= 1ULL << OVS_KEY_ATTR_ICMP; | |
186 | } | |
187 | } | |
188 | } | |
189 | ||
190 | if (match->key->eth.type == htons(ETH_P_IPV6)) { | |
191 | key_expected |= 1ULL << OVS_KEY_ATTR_IPV6; | |
192 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
193 | mask_allowed |= 1ULL << OVS_KEY_ATTR_IPV6; | |
194 | ||
195 | if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { | |
196 | if (match->key->ip.proto == IPPROTO_UDP) { | |
197 | key_expected |= 1ULL << OVS_KEY_ATTR_UDP; | |
198 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
199 | mask_allowed |= 1ULL << OVS_KEY_ATTR_UDP; | |
200 | } | |
201 | ||
10f72e3d JS |
202 | if (match->key->ip.proto == IPPROTO_SCTP) { |
203 | key_expected |= 1ULL << OVS_KEY_ATTR_SCTP; | |
204 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
205 | mask_allowed |= 1ULL << OVS_KEY_ATTR_SCTP; | |
206 | } | |
207 | ||
a1c564be AZ |
208 | if (match->key->ip.proto == IPPROTO_TCP) { |
209 | key_expected |= 1ULL << OVS_KEY_ATTR_TCP; | |
210 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
211 | mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP; | |
212 | } | |
213 | ||
214 | if (match->key->ip.proto == IPPROTO_ICMPV6) { | |
215 | key_expected |= 1ULL << OVS_KEY_ATTR_ICMPV6; | |
216 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
217 | mask_allowed |= 1ULL << OVS_KEY_ATTR_ICMPV6; | |
218 | ||
219 | if (match->key->ipv6.tp.src == | |
220 | htons(NDISC_NEIGHBOUR_SOLICITATION) || | |
221 | match->key->ipv6.tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) { | |
222 | key_expected |= 1ULL << OVS_KEY_ATTR_ND; | |
223 | if (match->mask && (match->mask->key.ipv6.tp.src == htons(0xffff))) | |
224 | mask_allowed |= 1ULL << OVS_KEY_ATTR_ND; | |
225 | } | |
226 | } | |
227 | } | |
228 | } | |
229 | ||
1b936472 | 230 | if ((key_attrs & key_expected) != key_expected) { |
a1c564be | 231 | /* Key attributes check failed. */ |
1b936472 AZ |
232 | OVS_NLERR("Missing expected key attributes (key_attrs=%llx, expected=%llx).\n", |
233 | key_attrs, key_expected); | |
a1c564be | 234 | return false; |
1b936472 | 235 | } |
a1c564be | 236 | |
1b936472 | 237 | if ((mask_attrs & mask_allowed) != mask_attrs) { |
a1c564be | 238 | /* Mask attributes check failed. */ |
1b936472 AZ |
239 | OVS_NLERR("Contain more than allowed mask fields (mask_attrs=%llx, mask_allowed=%llx).\n", |
240 | mask_attrs, mask_allowed); | |
a1c564be | 241 | return false; |
1b936472 | 242 | } |
a1c564be AZ |
243 | |
244 | return true; | |
245 | } | |
246 | ||
2db65bf7 JG |
247 | static int check_header(struct sk_buff *skb, int len) |
248 | { | |
249 | if (unlikely(skb->len < len)) | |
250 | return -EINVAL; | |
251 | if (unlikely(!pskb_may_pull(skb, len))) | |
252 | return -ENOMEM; | |
253 | return 0; | |
254 | } | |
255 | ||
6455100f | 256 | static bool arphdr_ok(struct sk_buff *skb) |
a26ef517 | 257 | { |
2db65bf7 JG |
258 | return pskb_may_pull(skb, skb_network_offset(skb) + |
259 | sizeof(struct arp_eth_header)); | |
a26ef517 JP |
260 | } |
261 | ||
6455100f | 262 | static int check_iphdr(struct sk_buff *skb) |
064af421 | 263 | { |
4c1ad233 BP |
264 | unsigned int nh_ofs = skb_network_offset(skb); |
265 | unsigned int ip_len; | |
2db65bf7 | 266 | int err; |
4c1ad233 | 267 | |
2db65bf7 JG |
268 | err = check_header(skb, nh_ofs + sizeof(struct iphdr)); |
269 | if (unlikely(err)) | |
270 | return err; | |
4c1ad233 BP |
271 | |
272 | ip_len = ip_hdrlen(skb); | |
2db65bf7 JG |
273 | if (unlikely(ip_len < sizeof(struct iphdr) || |
274 | skb->len < nh_ofs + ip_len)) | |
4c1ad233 BP |
275 | return -EINVAL; |
276 | ||
4c1ad233 BP |
277 | skb_set_transport_header(skb, nh_ofs + ip_len); |
278 | return 0; | |
064af421 BP |
279 | } |
280 | ||
6455100f | 281 | static bool tcphdr_ok(struct sk_buff *skb) |
064af421 BP |
282 | { |
283 | int th_ofs = skb_transport_offset(skb); | |
2db65bf7 JG |
284 | int tcp_len; |
285 | ||
286 | if (unlikely(!pskb_may_pull(skb, th_ofs + sizeof(struct tcphdr)))) | |
287 | return false; | |
288 | ||
289 | tcp_len = tcp_hdrlen(skb); | |
290 | if (unlikely(tcp_len < sizeof(struct tcphdr) || | |
291 | skb->len < th_ofs + tcp_len)) | |
292 | return false; | |
293 | ||
294 | return true; | |
064af421 BP |
295 | } |
296 | ||
6455100f | 297 | static bool udphdr_ok(struct sk_buff *skb) |
064af421 | 298 | { |
2db65bf7 JG |
299 | return pskb_may_pull(skb, skb_transport_offset(skb) + |
300 | sizeof(struct udphdr)); | |
064af421 BP |
301 | } |
302 | ||
10f72e3d JS |
303 | static bool sctphdr_ok(struct sk_buff *skb) |
304 | { | |
305 | return pskb_may_pull(skb, skb_transport_offset(skb) + | |
306 | sizeof(struct sctphdr)); | |
307 | } | |
308 | ||
6455100f | 309 | static bool icmphdr_ok(struct sk_buff *skb) |
064af421 | 310 | { |
2db65bf7 JG |
311 | return pskb_may_pull(skb, skb_transport_offset(skb) + |
312 | sizeof(struct icmphdr)); | |
064af421 BP |
313 | } |
314 | ||
850b6b3b | 315 | u64 ovs_flow_used_time(unsigned long flow_jiffies) |
ec58547a JG |
316 | { |
317 | struct timespec cur_ts; | |
318 | u64 cur_ms, idle_ms; | |
319 | ||
320 | ktime_get_ts(&cur_ts); | |
321 | idle_ms = jiffies_to_msecs(jiffies - flow_jiffies); | |
322 | cur_ms = (u64)cur_ts.tv_sec * MSEC_PER_SEC + | |
323 | cur_ts.tv_nsec / NSEC_PER_MSEC; | |
324 | ||
325 | return cur_ms - idle_ms; | |
326 | } | |
327 | ||
a1c564be | 328 | static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key) |
d31f1109 JP |
329 | { |
330 | unsigned int nh_ofs = skb_network_offset(skb); | |
331 | unsigned int nh_len; | |
332 | int payload_ofs; | |
d31f1109 JP |
333 | struct ipv6hdr *nh; |
334 | uint8_t nexthdr; | |
0fd0d083 | 335 | __be16 frag_off; |
2db65bf7 | 336 | int err; |
d31f1109 | 337 | |
2db65bf7 JG |
338 | err = check_header(skb, nh_ofs + sizeof(*nh)); |
339 | if (unlikely(err)) | |
340 | return err; | |
d31f1109 JP |
341 | |
342 | nh = ipv6_hdr(skb); | |
343 | nexthdr = nh->nexthdr; | |
344 | payload_ofs = (u8 *)(nh + 1) - skb->data; | |
d31f1109 | 345 | |
28bad473 | 346 | key->ip.proto = NEXTHDR_NONE; |
530180fd | 347 | key->ip.tos = ipv6_get_dsfield(nh); |
a61680c6 | 348 | key->ip.ttl = nh->hop_limit; |
fa8223b7 | 349 | key->ipv6.label = *(__be32 *)nh & htonl(IPV6_FLOWINFO_FLOWLABEL); |
858d1026 JG |
350 | key->ipv6.addr.src = nh->saddr; |
351 | key->ipv6.addr.dst = nh->daddr; | |
d31f1109 | 352 | |
0fd0d083 | 353 | payload_ofs = ipv6_skip_exthdr(skb, payload_ofs, &nexthdr, &frag_off); |
bfef4717 | 354 | if (unlikely(payload_ofs < 0)) |
d31f1109 | 355 | return -EINVAL; |
bfef4717 | 356 | |
0fd0d083 JG |
357 | if (frag_off) { |
358 | if (frag_off & htons(~0x7)) | |
359 | key->ip.frag = OVS_FRAG_TYPE_LATER; | |
360 | else | |
361 | key->ip.frag = OVS_FRAG_TYPE_FIRST; | |
362 | } | |
363 | ||
d31f1109 | 364 | nh_len = payload_ofs - nh_ofs; |
d31f1109 | 365 | skb_set_transport_header(skb, nh_ofs + nh_len); |
28bad473 | 366 | key->ip.proto = nexthdr; |
d31f1109 JP |
367 | return nh_len; |
368 | } | |
369 | ||
370 | static bool icmp6hdr_ok(struct sk_buff *skb) | |
371 | { | |
2db65bf7 JG |
372 | return pskb_may_pull(skb, skb_transport_offset(skb) + |
373 | sizeof(struct icmp6hdr)); | |
d31f1109 | 374 | } |
ec58547a | 375 | |
529db635 JG |
376 | void ovs_flow_key_mask(struct sw_flow_key *dst, const struct sw_flow_key *src, |
377 | const struct sw_flow_mask *mask) | |
a1c564be | 378 | { |
c2dd5e99 AZ |
379 | const long *m = (long *)((u8 *)&mask->key + mask->range.start); |
380 | const long *s = (long *)((u8 *)src + mask->range.start); | |
381 | long *d = (long *)((u8 *)dst + mask->range.start); | |
a1c564be AZ |
382 | int i; |
383 | ||
c2dd5e99 AZ |
384 | /* The memory outside of the 'mask->range' are not set since |
385 | * further operations on 'dst' only uses contents within | |
386 | * 'mask->range'. | |
387 | */ | |
388 | for (i = 0; i < range_n_bytes(&mask->range); i += sizeof(long)) | |
389 | *d++ = *s++ & *m++; | |
a1c564be AZ |
390 | } |
391 | ||
064af421 BP |
392 | #define TCP_FLAGS_OFFSET 13 |
393 | #define TCP_FLAG_MASK 0x3f | |
394 | ||
850b6b3b | 395 | void ovs_flow_used(struct sw_flow *flow, struct sk_buff *skb) |
064af421 | 396 | { |
064af421 BP |
397 | u8 tcp_flags = 0; |
398 | ||
11460e23 JG |
399 | if ((flow->key.eth.type == htons(ETH_P_IP) || |
400 | flow->key.eth.type == htons(ETH_P_IPV6)) && | |
9c47b45a JG |
401 | flow->key.ip.proto == IPPROTO_TCP && |
402 | likely(skb->len >= skb_transport_offset(skb) + sizeof(struct tcphdr))) { | |
abfec865 BP |
403 | u8 *tcp = (u8 *)tcp_hdr(skb); |
404 | tcp_flags = *(tcp + TCP_FLAGS_OFFSET) & TCP_FLAG_MASK; | |
064af421 BP |
405 | } |
406 | ||
e9141eec | 407 | spin_lock(&flow->lock); |
6bfafa55 | 408 | flow->used = jiffies; |
064af421 BP |
409 | flow->packet_count++; |
410 | flow->byte_count += skb->len; | |
411 | flow->tcp_flags |= tcp_flags; | |
e9141eec | 412 | spin_unlock(&flow->lock); |
064af421 BP |
413 | } |
414 | ||
9b405f1a | 415 | struct sw_flow_actions *ovs_flow_actions_alloc(int size) |
064af421 BP |
416 | { |
417 | struct sw_flow_actions *sfa; | |
418 | ||
9b405f1a | 419 | if (size > MAX_ACTIONS_BUFSIZE) |
064af421 BP |
420 | return ERR_PTR(-EINVAL); |
421 | ||
ba400435 | 422 | sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL); |
064af421 BP |
423 | if (!sfa) |
424 | return ERR_PTR(-ENOMEM); | |
425 | ||
9b405f1a | 426 | sfa->actions_len = 0; |
064af421 BP |
427 | return sfa; |
428 | } | |
429 | ||
850b6b3b | 430 | struct sw_flow *ovs_flow_alloc(void) |
560e8022 JG |
431 | { |
432 | struct sw_flow *flow; | |
433 | ||
434 | flow = kmem_cache_alloc(flow_cache, GFP_KERNEL); | |
435 | if (!flow) | |
436 | return ERR_PTR(-ENOMEM); | |
437 | ||
438 | spin_lock_init(&flow->lock); | |
6f04e94a | 439 | flow->sf_acts = NULL; |
a1c564be | 440 | flow->mask = NULL; |
064af421 | 441 | |
560e8022 JG |
442 | return flow; |
443 | } | |
444 | ||
be2ba156 | 445 | static struct hlist_head *find_bucket(struct flow_table *table, u32 hash) |
8d5ebd83 | 446 | { |
acd051f1 | 447 | hash = jhash_1word(hash, table->hash_seed); |
3544358a PS |
448 | return flex_array_get(table->buckets, |
449 | (hash & (table->n_buckets - 1))); | |
450 | } | |
451 | ||
be2ba156 | 452 | static struct flex_array *alloc_buckets(unsigned int n_buckets) |
3544358a | 453 | { |
be2ba156 | 454 | struct flex_array *buckets; |
3544358a PS |
455 | int i, err; |
456 | ||
8e1a83d8 | 457 | buckets = flex_array_alloc(sizeof(struct hlist_head), |
3544358a PS |
458 | n_buckets, GFP_KERNEL); |
459 | if (!buckets) | |
460 | return NULL; | |
461 | ||
462 | err = flex_array_prealloc(buckets, 0, n_buckets, GFP_KERNEL); | |
463 | if (err) { | |
464 | flex_array_free(buckets); | |
465 | return NULL; | |
466 | } | |
467 | ||
468 | for (i = 0; i < n_buckets; i++) | |
469 | INIT_HLIST_HEAD((struct hlist_head *) | |
470 | flex_array_get(buckets, i)); | |
471 | ||
472 | return buckets; | |
473 | } | |
474 | ||
6455100f | 475 | static void free_buckets(struct flex_array *buckets) |
3544358a PS |
476 | { |
477 | flex_array_free(buckets); | |
478 | } | |
479 | ||
ede77a46 | 480 | static struct flow_table *__flow_tbl_alloc(int new_size) |
3544358a PS |
481 | { |
482 | struct flow_table *table = kmalloc(sizeof(*table), GFP_KERNEL); | |
483 | ||
484 | if (!table) | |
485 | return NULL; | |
486 | ||
487 | table->buckets = alloc_buckets(new_size); | |
488 | ||
489 | if (!table->buckets) { | |
490 | kfree(table); | |
491 | return NULL; | |
492 | } | |
493 | table->n_buckets = new_size; | |
494 | table->count = 0; | |
acd051f1 PS |
495 | table->node_ver = 0; |
496 | table->keep_flows = false; | |
497 | get_random_bytes(&table->hash_seed, sizeof(u32)); | |
ede77a46 | 498 | table->mask_list = NULL; |
3544358a PS |
499 | |
500 | return table; | |
501 | } | |
fb8c9347 | 502 | |
a1c564be | 503 | static void __flow_tbl_destroy(struct flow_table *table) |
3544358a PS |
504 | { |
505 | int i; | |
506 | ||
acd051f1 PS |
507 | if (table->keep_flows) |
508 | goto skip_flows; | |
509 | ||
3544358a PS |
510 | for (i = 0; i < table->n_buckets; i++) { |
511 | struct sw_flow *flow; | |
512 | struct hlist_head *head = flex_array_get(table->buckets, i); | |
f8dfbcb7 | 513 | struct hlist_node *n; |
acd051f1 | 514 | int ver = table->node_ver; |
3544358a | 515 | |
f8dfbcb7 | 516 | hlist_for_each_entry_safe(flow, n, head, hash_node[ver]) { |
16c6b921 | 517 | hlist_del(&flow->hash_node[ver]); |
a1c564be | 518 | ovs_flow_free(flow, false); |
3544358a PS |
519 | } |
520 | } | |
521 | ||
ede77a46 AZ |
522 | BUG_ON(!list_empty(table->mask_list)); |
523 | kfree(table->mask_list); | |
524 | ||
acd051f1 | 525 | skip_flows: |
3544358a PS |
526 | free_buckets(table->buckets); |
527 | kfree(table); | |
528 | } | |
529 | ||
ede77a46 AZ |
530 | struct flow_table *ovs_flow_tbl_alloc(int new_size) |
531 | { | |
532 | struct flow_table *table = __flow_tbl_alloc(new_size); | |
533 | ||
534 | if (!table) | |
535 | return NULL; | |
536 | ||
537 | table->mask_list = kmalloc(sizeof(struct list_head), GFP_KERNEL); | |
538 | if (!table->mask_list) { | |
539 | table->keep_flows = true; | |
540 | __flow_tbl_destroy(table); | |
541 | return NULL; | |
542 | } | |
543 | INIT_LIST_HEAD(table->mask_list); | |
544 | ||
545 | return table; | |
546 | } | |
547 | ||
3544358a PS |
548 | static void flow_tbl_destroy_rcu_cb(struct rcu_head *rcu) |
549 | { | |
550 | struct flow_table *table = container_of(rcu, struct flow_table, rcu); | |
551 | ||
a1c564be | 552 | __flow_tbl_destroy(table); |
3544358a PS |
553 | } |
554 | ||
a1c564be | 555 | void ovs_flow_tbl_destroy(struct flow_table *table, bool deferred) |
3544358a | 556 | { |
6455100f PS |
557 | if (!table) |
558 | return; | |
3544358a | 559 | |
a1c564be AZ |
560 | if (deferred) |
561 | call_rcu(&table->rcu, flow_tbl_destroy_rcu_cb); | |
562 | else | |
563 | __flow_tbl_destroy(table); | |
3544358a PS |
564 | } |
565 | ||
a1c564be | 566 | struct sw_flow *ovs_flow_dump_next(struct flow_table *table, u32 *bucket, u32 *last) |
3544358a PS |
567 | { |
568 | struct sw_flow *flow; | |
569 | struct hlist_head *head; | |
acd051f1 | 570 | int ver; |
3544358a PS |
571 | int i; |
572 | ||
acd051f1 | 573 | ver = table->node_ver; |
3544358a PS |
574 | while (*bucket < table->n_buckets) { |
575 | i = 0; | |
576 | head = flex_array_get(table->buckets, *bucket); | |
f8dfbcb7 | 577 | hlist_for_each_entry_rcu(flow, head, hash_node[ver]) { |
3544358a PS |
578 | if (i < *last) { |
579 | i++; | |
580 | continue; | |
581 | } | |
582 | *last = i + 1; | |
583 | return flow; | |
584 | } | |
585 | (*bucket)++; | |
586 | *last = 0; | |
587 | } | |
588 | ||
589 | return NULL; | |
590 | } | |
591 | ||
a1c564be | 592 | static void __tbl_insert(struct flow_table *table, struct sw_flow *flow) |
13e24889 PS |
593 | { |
594 | struct hlist_head *head; | |
a1c564be | 595 | |
13e24889 PS |
596 | head = find_bucket(table, flow->hash); |
597 | hlist_add_head_rcu(&flow->hash_node[table->node_ver], head); | |
a1c564be | 598 | |
13e24889 PS |
599 | table->count++; |
600 | } | |
601 | ||
acd051f1 | 602 | static void flow_table_copy_flows(struct flow_table *old, struct flow_table *new) |
3544358a | 603 | { |
acd051f1 | 604 | int old_ver; |
3544358a PS |
605 | int i; |
606 | ||
acd051f1 PS |
607 | old_ver = old->node_ver; |
608 | new->node_ver = !old_ver; | |
3544358a | 609 | |
acd051f1 PS |
610 | /* Insert in new table. */ |
611 | for (i = 0; i < old->n_buckets; i++) { | |
3544358a PS |
612 | struct sw_flow *flow; |
613 | struct hlist_head *head; | |
3544358a | 614 | |
acd051f1 | 615 | head = flex_array_get(old->buckets, i); |
3544358a | 616 | |
f8dfbcb7 | 617 | hlist_for_each_entry(flow, head, hash_node[old_ver]) |
a1c564be | 618 | __tbl_insert(new, flow); |
3544358a | 619 | } |
a1c564be AZ |
620 | |
621 | new->mask_list = old->mask_list; | |
acd051f1 PS |
622 | old->keep_flows = true; |
623 | } | |
624 | ||
625 | static struct flow_table *__flow_tbl_rehash(struct flow_table *table, int n_buckets) | |
626 | { | |
627 | struct flow_table *new_table; | |
628 | ||
ede77a46 | 629 | new_table = __flow_tbl_alloc(n_buckets); |
acd051f1 PS |
630 | if (!new_table) |
631 | return ERR_PTR(-ENOMEM); | |
632 | ||
633 | flow_table_copy_flows(table, new_table); | |
3544358a PS |
634 | |
635 | return new_table; | |
636 | } | |
637 | ||
acd051f1 PS |
638 | struct flow_table *ovs_flow_tbl_rehash(struct flow_table *table) |
639 | { | |
640 | return __flow_tbl_rehash(table, table->n_buckets); | |
641 | } | |
642 | ||
643 | struct flow_table *ovs_flow_tbl_expand(struct flow_table *table) | |
644 | { | |
645 | return __flow_tbl_rehash(table, table->n_buckets * 2); | |
646 | } | |
647 | ||
a1c564be | 648 | static void __flow_free(struct sw_flow *flow) |
9321954a | 649 | { |
9321954a JG |
650 | kfree((struct sf_flow_acts __force *)flow->sf_acts); |
651 | kmem_cache_free(flow_cache, flow); | |
652 | } | |
653 | ||
064af421 BP |
654 | static void rcu_free_flow_callback(struct rcu_head *rcu) |
655 | { | |
656 | struct sw_flow *flow = container_of(rcu, struct sw_flow, rcu); | |
fb8c9347 | 657 | |
a1c564be | 658 | __flow_free(flow); |
064af421 BP |
659 | } |
660 | ||
a1c564be | 661 | void ovs_flow_free(struct sw_flow *flow, bool deferred) |
064af421 | 662 | { |
a1c564be AZ |
663 | if (!flow) |
664 | return; | |
665 | ||
3d097064 | 666 | ovs_sw_flow_mask_del_ref(flow->mask, deferred); |
a1c564be AZ |
667 | |
668 | if (deferred) | |
669 | call_rcu(&flow->rcu, rcu_free_flow_callback); | |
670 | else | |
671 | __flow_free(flow); | |
064af421 BP |
672 | } |
673 | ||
850b6b3b | 674 | /* RCU callback used by ovs_flow_deferred_free_acts. */ |
064af421 BP |
675 | static void rcu_free_acts_callback(struct rcu_head *rcu) |
676 | { | |
d295e8e9 | 677 | struct sw_flow_actions *sf_acts = container_of(rcu, |
064af421 | 678 | struct sw_flow_actions, rcu); |
ba400435 | 679 | kfree(sf_acts); |
064af421 BP |
680 | } |
681 | ||
682 | /* Schedules 'sf_acts' to be freed after the next RCU grace period. | |
683 | * The caller must hold rcu_read_lock for this to be sensible. */ | |
850b6b3b | 684 | void ovs_flow_deferred_free_acts(struct sw_flow_actions *sf_acts) |
064af421 BP |
685 | { |
686 | call_rcu(&sf_acts->rcu, rcu_free_acts_callback); | |
687 | } | |
688 | ||
2db65bf7 | 689 | static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key) |
064af421 | 690 | { |
50f06e16 BP |
691 | struct qtag_prefix { |
692 | __be16 eth_type; /* ETH_P_8021Q */ | |
693 | __be16 tci; | |
694 | }; | |
695 | struct qtag_prefix *qp; | |
696 | ||
8ddc056d BP |
697 | if (unlikely(skb->len < sizeof(struct qtag_prefix) + sizeof(__be16))) |
698 | return 0; | |
699 | ||
2db65bf7 JG |
700 | if (unlikely(!pskb_may_pull(skb, sizeof(struct qtag_prefix) + |
701 | sizeof(__be16)))) | |
702 | return -ENOMEM; | |
50f06e16 BP |
703 | |
704 | qp = (struct qtag_prefix *) skb->data; | |
76abe283 | 705 | key->eth.tci = qp->tci | htons(VLAN_TAG_PRESENT); |
50f06e16 | 706 | __skb_pull(skb, sizeof(struct qtag_prefix)); |
2db65bf7 JG |
707 | |
708 | return 0; | |
50f06e16 BP |
709 | } |
710 | ||
711 | static __be16 parse_ethertype(struct sk_buff *skb) | |
064af421 | 712 | { |
50f06e16 BP |
713 | struct llc_snap_hdr { |
714 | u8 dsap; /* Always 0xAA */ | |
715 | u8 ssap; /* Always 0xAA */ | |
716 | u8 ctrl; | |
717 | u8 oui[3]; | |
8dda8c9b | 718 | __be16 ethertype; |
50f06e16 BP |
719 | }; |
720 | struct llc_snap_hdr *llc; | |
721 | __be16 proto; | |
722 | ||
723 | proto = *(__be16 *) skb->data; | |
724 | __skb_pull(skb, sizeof(__be16)); | |
725 | ||
7cd46155 | 726 | if (ntohs(proto) >= ETH_P_802_3_MIN) |
50f06e16 BP |
727 | return proto; |
728 | ||
2db65bf7 | 729 | if (skb->len < sizeof(struct llc_snap_hdr)) |
36956a7d | 730 | return htons(ETH_P_802_2); |
50f06e16 | 731 | |
2db65bf7 JG |
732 | if (unlikely(!pskb_may_pull(skb, sizeof(struct llc_snap_hdr)))) |
733 | return htons(0); | |
734 | ||
50f06e16 BP |
735 | llc = (struct llc_snap_hdr *) skb->data; |
736 | if (llc->dsap != LLC_SAP_SNAP || | |
737 | llc->ssap != LLC_SAP_SNAP || | |
738 | (llc->oui[0] | llc->oui[1] | llc->oui[2]) != 0) | |
36956a7d | 739 | return htons(ETH_P_802_2); |
50f06e16 BP |
740 | |
741 | __skb_pull(skb, sizeof(struct llc_snap_hdr)); | |
9e69bc5f | 742 | |
7cd46155 | 743 | if (ntohs(llc->ethertype) >= ETH_P_802_3_MIN) |
9e69bc5f RL |
744 | return llc->ethertype; |
745 | ||
746 | return htons(ETH_P_802_2); | |
064af421 BP |
747 | } |
748 | ||
685a51a5 | 749 | static int parse_icmpv6(struct sk_buff *skb, struct sw_flow_key *key, |
a1c564be | 750 | int nh_len) |
685a51a5 | 751 | { |
685a51a5 JP |
752 | struct icmp6hdr *icmp = icmp6_hdr(skb); |
753 | ||
754 | /* The ICMPv6 type and code fields use the 16-bit transport port | |
bfef4717 JG |
755 | * fields, so we need to store them in 16-bit network byte order. |
756 | */ | |
76abe283 AE |
757 | key->ipv6.tp.src = htons(icmp->icmp6_type); |
758 | key->ipv6.tp.dst = htons(icmp->icmp6_code); | |
685a51a5 | 759 | |
bfef4717 JG |
760 | if (icmp->icmp6_code == 0 && |
761 | (icmp->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION || | |
762 | icmp->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT)) { | |
e977ba19 | 763 | int icmp_len = skb->len - skb_transport_offset(skb); |
685a51a5 JP |
764 | struct nd_msg *nd; |
765 | int offset; | |
766 | ||
767 | /* In order to process neighbor discovery options, we need the | |
bfef4717 JG |
768 | * entire packet. |
769 | */ | |
770 | if (unlikely(icmp_len < sizeof(*nd))) | |
a1c564be AZ |
771 | return 0; |
772 | ||
773 | if (unlikely(skb_linearize(skb))) | |
774 | return -ENOMEM; | |
685a51a5 JP |
775 | |
776 | nd = (struct nd_msg *)skb_transport_header(skb); | |
858d1026 | 777 | key->ipv6.nd.target = nd->target; |
685a51a5 JP |
778 | |
779 | icmp_len -= sizeof(*nd); | |
780 | offset = 0; | |
781 | while (icmp_len >= 8) { | |
6455100f PS |
782 | struct nd_opt_hdr *nd_opt = |
783 | (struct nd_opt_hdr *)(nd->opt + offset); | |
685a51a5 JP |
784 | int opt_len = nd_opt->nd_opt_len * 8; |
785 | ||
bfef4717 | 786 | if (unlikely(!opt_len || opt_len > icmp_len)) |
a1c564be | 787 | return 0; |
685a51a5 | 788 | |
bfef4717 JG |
789 | /* Store the link layer address if the appropriate |
790 | * option is provided. It is considered an error if | |
791 | * the same link layer option is specified twice. | |
792 | */ | |
685a51a5 | 793 | if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LL_ADDR |
bfef4717 | 794 | && opt_len == 8) { |
76abe283 | 795 | if (unlikely(!is_zero_ether_addr(key->ipv6.nd.sll))) |
685a51a5 | 796 | goto invalid; |
76abe283 | 797 | memcpy(key->ipv6.nd.sll, |
bfef4717 | 798 | &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN); |
685a51a5 | 799 | } else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LL_ADDR |
bfef4717 | 800 | && opt_len == 8) { |
76abe283 | 801 | if (unlikely(!is_zero_ether_addr(key->ipv6.nd.tll))) |
685a51a5 | 802 | goto invalid; |
76abe283 | 803 | memcpy(key->ipv6.nd.tll, |
bfef4717 | 804 | &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN); |
685a51a5 JP |
805 | } |
806 | ||
807 | icmp_len -= opt_len; | |
808 | offset += opt_len; | |
809 | } | |
810 | } | |
811 | ||
a1c564be | 812 | return 0; |
685a51a5 JP |
813 | |
814 | invalid: | |
76abe283 AE |
815 | memset(&key->ipv6.nd.target, 0, sizeof(key->ipv6.nd.target)); |
816 | memset(key->ipv6.nd.sll, 0, sizeof(key->ipv6.nd.sll)); | |
817 | memset(key->ipv6.nd.tll, 0, sizeof(key->ipv6.nd.tll)); | |
685a51a5 | 818 | |
a1c564be | 819 | return 0; |
685a51a5 JP |
820 | } |
821 | ||
a31e0e31 | 822 | /** |
850b6b3b | 823 | * ovs_flow_extract - extracts a flow key from an Ethernet frame. |
a31e0e31 BP |
824 | * @skb: sk_buff that contains the frame, with skb->data pointing to the |
825 | * Ethernet header | |
826 | * @in_port: port number on which @skb was received. | |
827 | * @key: output flow key | |
828 | * | |
829 | * The caller must ensure that skb->len >= ETH_HLEN. | |
830 | * | |
4c1ad233 BP |
831 | * Returns 0 if successful, otherwise a negative errno value. |
832 | * | |
59a18f80 BP |
833 | * Initializes @skb header pointers as follows: |
834 | * | |
835 | * - skb->mac_header: the Ethernet header. | |
836 | * | |
837 | * - skb->network_header: just past the Ethernet header, or just past the | |
838 | * VLAN header, to the first byte of the Ethernet payload. | |
839 | * | |
ae9020cf | 840 | * - skb->transport_header: If key->eth.type is ETH_P_IP or ETH_P_IPV6 |
d31f1109 JP |
841 | * on output, then just past the IP header, if one is present and |
842 | * of a correct length, otherwise the same as skb->network_header. | |
ae9020cf | 843 | * For other key->eth.type values it is left untouched. |
a31e0e31 | 844 | */ |
a1c564be | 845 | int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key) |
064af421 | 846 | { |
a1c564be | 847 | int error; |
064af421 | 848 | struct ethhdr *eth; |
064af421 | 849 | |
84c17d98 | 850 | memset(key, 0, sizeof(*key)); |
abff858b PS |
851 | |
852 | key->phy.priority = skb->priority; | |
356af50b | 853 | if (OVS_CB(skb)->tun_key) |
6694e498 | 854 | memcpy(&key->tun_key, OVS_CB(skb)->tun_key, sizeof(key->tun_key)); |
abff858b | 855 | key->phy.in_port = in_port; |
3025a772 | 856 | key->phy.skb_mark = skb->mark; |
064af421 | 857 | |
064af421 | 858 | skb_reset_mac_header(skb); |
064af421 | 859 | |
2db65bf7 JG |
860 | /* Link layer. We are guaranteed to have at least the 14 byte Ethernet |
861 | * header in the linear data area. | |
862 | */ | |
50f06e16 | 863 | eth = eth_hdr(skb); |
76abe283 AE |
864 | memcpy(key->eth.src, eth->h_source, ETH_ALEN); |
865 | memcpy(key->eth.dst, eth->h_dest, ETH_ALEN); | |
866 | ||
50f06e16 | 867 | __skb_pull(skb, 2 * ETH_ALEN); |
3cfede14 PS |
868 | /* We are going to push all headers that we pull, so no need to |
869 | * update skb->csum here. */ | |
6ce39213 JG |
870 | |
871 | if (vlan_tx_tag_present(skb)) | |
76abe283 | 872 | key->eth.tci = htons(vlan_get_tci(skb)); |
6ce39213 | 873 | else if (eth->h_proto == htons(ETH_P_8021Q)) |
2db65bf7 JG |
874 | if (unlikely(parse_vlan(skb, key))) |
875 | return -ENOMEM; | |
6ce39213 | 876 | |
76abe283 AE |
877 | key->eth.type = parse_ethertype(skb); |
878 | if (unlikely(key->eth.type == htons(0))) | |
2db65bf7 JG |
879 | return -ENOMEM; |
880 | ||
50f06e16 | 881 | skb_reset_network_header(skb); |
2db65bf7 | 882 | __skb_push(skb, skb->data - skb_mac_header(skb)); |
064af421 BP |
883 | |
884 | /* Network layer. */ | |
76abe283 | 885 | if (key->eth.type == htons(ETH_P_IP)) { |
4c1ad233 | 886 | struct iphdr *nh; |
7257b535 | 887 | __be16 offset; |
76abe283 | 888 | |
4c1ad233 BP |
889 | error = check_iphdr(skb); |
890 | if (unlikely(error)) { | |
891 | if (error == -EINVAL) { | |
892 | skb->transport_header = skb->network_header; | |
76abe283 | 893 | error = 0; |
4c1ad233 | 894 | } |
a1c564be | 895 | return error; |
4c1ad233 BP |
896 | } |
897 | ||
898 | nh = ip_hdr(skb); | |
76abe283 AE |
899 | key->ipv4.addr.src = nh->saddr; |
900 | key->ipv4.addr.dst = nh->daddr; | |
7257b535 | 901 | |
28bad473 | 902 | key->ip.proto = nh->protocol; |
530180fd | 903 | key->ip.tos = nh->tos; |
a61680c6 | 904 | key->ip.ttl = nh->ttl; |
064af421 | 905 | |
7257b535 BP |
906 | offset = nh->frag_off & htons(IP_OFFSET); |
907 | if (offset) { | |
9e44d715 | 908 | key->ip.frag = OVS_FRAG_TYPE_LATER; |
a1c564be | 909 | return 0; |
7257b535 BP |
910 | } |
911 | if (nh->frag_off & htons(IP_MF) || | |
912 | skb_shinfo(skb)->gso_type & SKB_GSO_UDP) | |
9e44d715 | 913 | key->ip.frag = OVS_FRAG_TYPE_FIRST; |
b7a31ec1 | 914 | |
7257b535 | 915 | /* Transport layer. */ |
28bad473 | 916 | if (key->ip.proto == IPPROTO_TCP) { |
7257b535 | 917 | if (tcphdr_ok(skb)) { |
5f4d087c JG |
918 | struct tcphdr *tcp = tcp_hdr(skb); |
919 | key->ipv4.tp.src = tcp->source; | |
920 | key->ipv4.tp.dst = tcp->dest; | |
921 | } | |
28bad473 | 922 | } else if (key->ip.proto == IPPROTO_UDP) { |
7257b535 | 923 | if (udphdr_ok(skb)) { |
5f4d087c JG |
924 | struct udphdr *udp = udp_hdr(skb); |
925 | key->ipv4.tp.src = udp->source; | |
926 | key->ipv4.tp.dst = udp->dest; | |
927 | } | |
10f72e3d JS |
928 | } else if (key->ip.proto == IPPROTO_SCTP) { |
929 | if (sctphdr_ok(skb)) { | |
930 | struct sctphdr *sctp = sctp_hdr(skb); | |
931 | key->ipv4.tp.src = sctp->source; | |
932 | key->ipv4.tp.dst = sctp->dest; | |
933 | } | |
28bad473 | 934 | } else if (key->ip.proto == IPPROTO_ICMP) { |
7257b535 | 935 | if (icmphdr_ok(skb)) { |
5f4d087c JG |
936 | struct icmphdr *icmp = icmp_hdr(skb); |
937 | /* The ICMP type and code fields use the 16-bit | |
6455100f PS |
938 | * transport port fields, so we need to store |
939 | * them in 16-bit network byte order. */ | |
5f4d087c JG |
940 | key->ipv4.tp.src = htons(icmp->type); |
941 | key->ipv4.tp.dst = htons(icmp->code); | |
942 | } | |
943 | } | |
944 | ||
8087f5ff MM |
945 | } else if ((key->eth.type == htons(ETH_P_ARP) || |
946 | key->eth.type == htons(ETH_P_RARP)) && arphdr_ok(skb)) { | |
a26ef517 JP |
947 | struct arp_eth_header *arp; |
948 | ||
949 | arp = (struct arp_eth_header *)skb_network_header(skb); | |
950 | ||
f5e86186 | 951 | if (arp->ar_hrd == htons(ARPHRD_ETHER) |
de3f65ea JP |
952 | && arp->ar_pro == htons(ETH_P_IP) |
953 | && arp->ar_hln == ETH_ALEN | |
954 | && arp->ar_pln == 4) { | |
955 | ||
956 | /* We only match on the lower 8 bits of the opcode. */ | |
b7a31ec1 | 957 | if (ntohs(arp->ar_op) <= 0xff) |
28bad473 | 958 | key->ip.proto = ntohs(arp->ar_op); |
a3d3ad0c MM |
959 | memcpy(&key->ipv4.addr.src, arp->ar_sip, sizeof(key->ipv4.addr.src)); |
960 | memcpy(&key->ipv4.addr.dst, arp->ar_tip, sizeof(key->ipv4.addr.dst)); | |
961 | memcpy(key->ipv4.arp.sha, arp->ar_sha, ETH_ALEN); | |
962 | memcpy(key->ipv4.arp.tha, arp->ar_tha, ETH_ALEN); | |
de3f65ea | 963 | } |
76abe283 | 964 | } else if (key->eth.type == htons(ETH_P_IPV6)) { |
d31f1109 JP |
965 | int nh_len; /* IPv6 Header + Extensions */ |
966 | ||
a1c564be | 967 | nh_len = parse_ipv6hdr(skb, key); |
d31f1109 | 968 | if (unlikely(nh_len < 0)) { |
a1c564be | 969 | if (nh_len == -EINVAL) { |
d31f1109 | 970 | skb->transport_header = skb->network_header; |
a1c564be AZ |
971 | error = 0; |
972 | } else { | |
76abe283 | 973 | error = nh_len; |
a1c564be AZ |
974 | } |
975 | return error; | |
d31f1109 JP |
976 | } |
977 | ||
9e44d715 | 978 | if (key->ip.frag == OVS_FRAG_TYPE_LATER) |
a1c564be | 979 | return 0; |
7257b535 | 980 | if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP) |
9e44d715 | 981 | key->ip.frag = OVS_FRAG_TYPE_FIRST; |
7257b535 | 982 | |
d31f1109 | 983 | /* Transport layer. */ |
28bad473 | 984 | if (key->ip.proto == NEXTHDR_TCP) { |
d31f1109 JP |
985 | if (tcphdr_ok(skb)) { |
986 | struct tcphdr *tcp = tcp_hdr(skb); | |
76abe283 AE |
987 | key->ipv6.tp.src = tcp->source; |
988 | key->ipv6.tp.dst = tcp->dest; | |
d31f1109 | 989 | } |
28bad473 | 990 | } else if (key->ip.proto == NEXTHDR_UDP) { |
d31f1109 JP |
991 | if (udphdr_ok(skb)) { |
992 | struct udphdr *udp = udp_hdr(skb); | |
76abe283 AE |
993 | key->ipv6.tp.src = udp->source; |
994 | key->ipv6.tp.dst = udp->dest; | |
d31f1109 | 995 | } |
10f72e3d JS |
996 | } else if (key->ip.proto == NEXTHDR_SCTP) { |
997 | if (sctphdr_ok(skb)) { | |
998 | struct sctphdr *sctp = sctp_hdr(skb); | |
999 | key->ipv6.tp.src = sctp->source; | |
1000 | key->ipv6.tp.dst = sctp->dest; | |
1001 | } | |
28bad473 | 1002 | } else if (key->ip.proto == NEXTHDR_ICMP) { |
d31f1109 | 1003 | if (icmp6hdr_ok(skb)) { |
a1c564be AZ |
1004 | error = parse_icmpv6(skb, key, nh_len); |
1005 | if (error) | |
1006 | return error; | |
d31f1109 JP |
1007 | } |
1008 | } | |
064af421 | 1009 | } |
76abe283 | 1010 | |
a1c564be | 1011 | return 0; |
064af421 BP |
1012 | } |
1013 | ||
cc611f66 AZ |
1014 | static u32 ovs_flow_hash(const struct sw_flow_key *key, int key_start, |
1015 | int key_end) | |
8d5ebd83 | 1016 | { |
c2dd5e99 AZ |
1017 | u32 *hash_key = (u32 *)((u8 *)key + key_start); |
1018 | int hash_u32s = (key_end - key_start) >> 2; | |
1019 | ||
1020 | /* Make sure number of hash bytes are multiple of u32. */ | |
1021 | BUILD_BUG_ON(sizeof(long) % sizeof(u32)); | |
1022 | ||
1023 | return jhash2(hash_key, hash_u32s, 0); | |
13e24889 PS |
1024 | } |
1025 | ||
a1c564be | 1026 | static int flow_key_start(const struct sw_flow_key *key) |
13e24889 | 1027 | { |
6694e498 | 1028 | if (key->tun_key.ipv4_dst) |
13e24889 PS |
1029 | return 0; |
1030 | else | |
c2dd5e99 AZ |
1031 | return rounddown(offsetof(struct sw_flow_key, phy), |
1032 | sizeof(long)); | |
8d5ebd83 JG |
1033 | } |
1034 | ||
a1c564be | 1035 | static bool __cmp_key(const struct sw_flow_key *key1, |
cc611f66 | 1036 | const struct sw_flow_key *key2, int key_start, int key_end) |
a1c564be | 1037 | { |
c2dd5e99 AZ |
1038 | const long *cp1 = (long *)((u8 *)key1 + key_start); |
1039 | const long *cp2 = (long *)((u8 *)key2 + key_start); | |
1040 | long diffs = 0; | |
1041 | int i; | |
1042 | ||
1043 | for (i = key_start; i < key_end; i += sizeof(long)) | |
1044 | diffs |= *cp1++ ^ *cp2++; | |
1045 | ||
1046 | return diffs == 0; | |
a1c564be AZ |
1047 | } |
1048 | ||
c2dd5e99 | 1049 | static bool __flow_cmp_masked_key(const struct sw_flow *flow, |
cc611f66 | 1050 | const struct sw_flow_key *key, int key_start, int key_end) |
a1c564be | 1051 | { |
cc611f66 | 1052 | return __cmp_key(&flow->key, key, key_start, key_end); |
a1c564be AZ |
1053 | } |
1054 | ||
1055 | static bool __flow_cmp_unmasked_key(const struct sw_flow *flow, | |
cc611f66 | 1056 | const struct sw_flow_key *key, int key_start, int key_end) |
a1c564be | 1057 | { |
cc611f66 | 1058 | return __cmp_key(&flow->unmasked_key, key, key_start, key_end); |
a1c564be AZ |
1059 | } |
1060 | ||
1061 | bool ovs_flow_cmp_unmasked_key(const struct sw_flow *flow, | |
cc611f66 | 1062 | const struct sw_flow_key *key, int key_end) |
a1c564be AZ |
1063 | { |
1064 | int key_start; | |
1065 | key_start = flow_key_start(key); | |
1066 | ||
cc611f66 | 1067 | return __flow_cmp_unmasked_key(flow, key, key_start, key_end); |
a1c564be AZ |
1068 | |
1069 | } | |
1070 | ||
1071 | struct sw_flow *ovs_flow_lookup_unmasked_key(struct flow_table *table, | |
1072 | struct sw_flow_match *match) | |
1073 | { | |
1074 | struct sw_flow_key *unmasked = match->key; | |
cc611f66 | 1075 | int key_end = match->range.end; |
a1c564be AZ |
1076 | struct sw_flow *flow; |
1077 | ||
1078 | flow = ovs_flow_lookup(table, unmasked); | |
cc611f66 | 1079 | if (flow && (!ovs_flow_cmp_unmasked_key(flow, unmasked, key_end))) |
a1c564be AZ |
1080 | flow = NULL; |
1081 | ||
1082 | return flow; | |
1083 | } | |
1084 | ||
1085 | static struct sw_flow *ovs_masked_flow_lookup(struct flow_table *table, | |
c2dd5e99 | 1086 | const struct sw_flow_key *unmasked, |
a1c564be | 1087 | struct sw_flow_mask *mask) |
8d5ebd83 | 1088 | { |
3544358a | 1089 | struct sw_flow *flow; |
3544358a | 1090 | struct hlist_head *head; |
a1c564be | 1091 | int key_start = mask->range.start; |
cc611f66 | 1092 | int key_end = mask->range.end; |
3544358a | 1093 | u32 hash; |
a1c564be | 1094 | struct sw_flow_key masked_key; |
8d5ebd83 | 1095 | |
c2dd5e99 | 1096 | ovs_flow_key_mask(&masked_key, unmasked, mask); |
cc611f66 | 1097 | hash = ovs_flow_hash(&masked_key, key_start, key_end); |
3544358a | 1098 | head = find_bucket(table, hash); |
f8dfbcb7 | 1099 | hlist_for_each_entry_rcu(flow, head, hash_node[table->node_ver]) { |
a99c219c | 1100 | if (flow->mask == mask && |
c2dd5e99 AZ |
1101 | __flow_cmp_masked_key(flow, &masked_key, |
1102 | key_start, key_end)) | |
3544358a | 1103 | return flow; |
3544358a PS |
1104 | } |
1105 | return NULL; | |
1106 | } | |
1107 | ||
a1c564be AZ |
1108 | struct sw_flow *ovs_flow_lookup(struct flow_table *tbl, |
1109 | const struct sw_flow_key *key) | |
3544358a | 1110 | { |
a1c564be AZ |
1111 | struct sw_flow *flow = NULL; |
1112 | struct sw_flow_mask *mask; | |
1113 | ||
ede77a46 | 1114 | list_for_each_entry_rcu(mask, tbl->mask_list, list) { |
a1c564be AZ |
1115 | flow = ovs_masked_flow_lookup(tbl, key, mask); |
1116 | if (flow) /* Found */ | |
1117 | break; | |
1118 | } | |
1119 | ||
1120 | return flow; | |
3544358a PS |
1121 | } |
1122 | ||
a1c564be | 1123 | |
529db635 | 1124 | void ovs_flow_insert(struct flow_table *table, struct sw_flow *flow) |
a1c564be | 1125 | { |
3d097064 AZ |
1126 | flow->hash = ovs_flow_hash(&flow->key, flow->mask->range.start, |
1127 | flow->mask->range.end); | |
a1c564be AZ |
1128 | __tbl_insert(table, flow); |
1129 | } | |
1130 | ||
1131 | void ovs_flow_remove(struct flow_table *table, struct sw_flow *flow) | |
3544358a | 1132 | { |
49c7f80c | 1133 | BUG_ON(table->count == 0); |
acd051f1 PS |
1134 | hlist_del_rcu(&flow->hash_node[table->node_ver]); |
1135 | table->count--; | |
36956a7d BP |
1136 | } |
1137 | ||
df2c07f4 | 1138 | /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */ |
4094406f BP |
1139 | const int ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = { |
1140 | [OVS_KEY_ATTR_ENCAP] = -1, | |
a1bf209f BP |
1141 | [OVS_KEY_ATTR_PRIORITY] = sizeof(u32), |
1142 | [OVS_KEY_ATTR_IN_PORT] = sizeof(u32), | |
72e8bf28 | 1143 | [OVS_KEY_ATTR_SKB_MARK] = sizeof(u32), |
df2c07f4 | 1144 | [OVS_KEY_ATTR_ETHERNET] = sizeof(struct ovs_key_ethernet), |
fea393b1 | 1145 | [OVS_KEY_ATTR_VLAN] = sizeof(__be16), |
a1bf209f | 1146 | [OVS_KEY_ATTR_ETHERTYPE] = sizeof(__be16), |
df2c07f4 JP |
1147 | [OVS_KEY_ATTR_IPV4] = sizeof(struct ovs_key_ipv4), |
1148 | [OVS_KEY_ATTR_IPV6] = sizeof(struct ovs_key_ipv6), | |
1149 | [OVS_KEY_ATTR_TCP] = sizeof(struct ovs_key_tcp), | |
1150 | [OVS_KEY_ATTR_UDP] = sizeof(struct ovs_key_udp), | |
10f72e3d | 1151 | [OVS_KEY_ATTR_SCTP] = sizeof(struct ovs_key_sctp), |
df2c07f4 JP |
1152 | [OVS_KEY_ATTR_ICMP] = sizeof(struct ovs_key_icmp), |
1153 | [OVS_KEY_ATTR_ICMPV6] = sizeof(struct ovs_key_icmpv6), | |
1154 | [OVS_KEY_ATTR_ARP] = sizeof(struct ovs_key_arp), | |
1155 | [OVS_KEY_ATTR_ND] = sizeof(struct ovs_key_nd), | |
9b405f1a | 1156 | [OVS_KEY_ATTR_TUNNEL] = -1, |
80e5eed9 BP |
1157 | }; |
1158 | ||
a1c564be | 1159 | static bool is_all_zero(const u8 *fp, size_t size) |
34118cae | 1160 | { |
a1c564be | 1161 | int i; |
34118cae | 1162 | |
a1c564be AZ |
1163 | if (!fp) |
1164 | return false; | |
34118cae | 1165 | |
a1c564be AZ |
1166 | for (i = 0; i < size; i++) |
1167 | if (fp[i]) | |
1168 | return false; | |
34118cae | 1169 | |
a1c564be | 1170 | return true; |
34118cae BP |
1171 | } |
1172 | ||
a1c564be AZ |
1173 | static int __parse_flow_nlattrs(const struct nlattr *attr, |
1174 | const struct nlattr *a[], | |
1175 | u64 *attrsp, bool nz) | |
fea393b1 BP |
1176 | { |
1177 | const struct nlattr *nla; | |
1178 | u64 attrs; | |
1179 | int rem; | |
1180 | ||
a1c564be | 1181 | attrs = *attrsp; |
fea393b1 BP |
1182 | nla_for_each_nested(nla, attr, rem) { |
1183 | u16 type = nla_type(nla); | |
4094406f | 1184 | int expected_len; |
fea393b1 | 1185 | |
1b936472 AZ |
1186 | if (type > OVS_KEY_ATTR_MAX) { |
1187 | OVS_NLERR("Unknown key attribute (type=%d, max=%d).\n", | |
1188 | type, OVS_KEY_ATTR_MAX); | |
eba93614 | 1189 | return -EINVAL; |
1b936472 | 1190 | } |
4094406f | 1191 | |
1b936472 AZ |
1192 | if (attrs & (1ULL << type)) { |
1193 | OVS_NLERR("Duplicate key attribute (type %d).\n", type); | |
4094406f | 1194 | return -EINVAL; |
1b936472 | 1195 | } |
4094406f | 1196 | |
1b936472 AZ |
1197 | expected_len = ovs_key_lens[type]; |
1198 | if (nla_len(nla) != expected_len && expected_len != -1) { | |
1199 | OVS_NLERR("Key attribute has unexpected length (type=%d" | |
1200 | ", length=%d, expected=%d).\n", type, | |
1201 | nla_len(nla), expected_len); | |
a1c564be | 1202 | return -EINVAL; |
1b936472 | 1203 | } |
a1c564be AZ |
1204 | |
1205 | if (!nz || !is_all_zero(nla_data(nla), expected_len)) { | |
1206 | attrs |= 1ULL << type; | |
1207 | a[type] = nla; | |
1208 | } | |
fea393b1 | 1209 | } |
1b936472 AZ |
1210 | if (rem) { |
1211 | OVS_NLERR("Message has %d unknown bytes.\n", rem); | |
fea393b1 | 1212 | return -EINVAL; |
1b936472 | 1213 | } |
fea393b1 BP |
1214 | |
1215 | *attrsp = attrs; | |
1216 | return 0; | |
1217 | } | |
1218 | ||
a1c564be AZ |
1219 | static int parse_flow_mask_nlattrs(const struct nlattr *attr, |
1220 | const struct nlattr *a[], u64 *attrsp) | |
1221 | { | |
1222 | return __parse_flow_nlattrs(attr, a, attrsp, true); | |
1223 | } | |
1224 | ||
1225 | static int parse_flow_nlattrs(const struct nlattr *attr, | |
1226 | const struct nlattr *a[], u64 *attrsp) | |
1227 | { | |
1228 | return __parse_flow_nlattrs(attr, a, attrsp, false); | |
1229 | } | |
1230 | ||
54cc3ec6 JG |
1231 | int ovs_ipv4_tun_from_nlattr(const struct nlattr *attr, |
1232 | struct sw_flow_match *match, bool is_mask) | |
9b405f1a PS |
1233 | { |
1234 | struct nlattr *a; | |
1235 | int rem; | |
1236 | bool ttl = false; | |
5ebaf571 | 1237 | __be16 tun_flags = 0; |
9b405f1a PS |
1238 | |
1239 | nla_for_each_nested(a, attr, rem) { | |
1240 | int type = nla_type(a); | |
1241 | static const u32 ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = { | |
1242 | [OVS_TUNNEL_KEY_ATTR_ID] = sizeof(u64), | |
1243 | [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = sizeof(u32), | |
1244 | [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = sizeof(u32), | |
1245 | [OVS_TUNNEL_KEY_ATTR_TOS] = 1, | |
1246 | [OVS_TUNNEL_KEY_ATTR_TTL] = 1, | |
1247 | [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = 0, | |
1248 | [OVS_TUNNEL_KEY_ATTR_CSUM] = 0, | |
1249 | }; | |
1250 | ||
1b936472 | 1251 | if (type > OVS_TUNNEL_KEY_ATTR_MAX) { |
17ce1965 | 1252 | OVS_NLERR("Unknown IPv4 tunnel attribute (type=%d, max=%d).\n", |
1b936472 AZ |
1253 | type, OVS_TUNNEL_KEY_ATTR_MAX); |
1254 | return -EINVAL; | |
1255 | } | |
1256 | ||
1257 | if (ovs_tunnel_key_lens[type] != nla_len(a)) { | |
1258 | OVS_NLERR("IPv4 tunnel attribute type has unexpected " | |
e821558d | 1259 | " length (type=%d, length=%d, expected=%d).\n", |
1b936472 | 1260 | type, nla_len(a), ovs_tunnel_key_lens[type]); |
9b405f1a | 1261 | return -EINVAL; |
1b936472 | 1262 | } |
9b405f1a PS |
1263 | |
1264 | switch (type) { | |
1265 | case OVS_TUNNEL_KEY_ATTR_ID: | |
a1c564be AZ |
1266 | SW_FLOW_KEY_PUT(match, tun_key.tun_id, |
1267 | nla_get_be64(a), is_mask); | |
5ebaf571 | 1268 | tun_flags |= TUNNEL_KEY; |
9b405f1a PS |
1269 | break; |
1270 | case OVS_TUNNEL_KEY_ATTR_IPV4_SRC: | |
a1c564be AZ |
1271 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_src, |
1272 | nla_get_be32(a), is_mask); | |
9b405f1a PS |
1273 | break; |
1274 | case OVS_TUNNEL_KEY_ATTR_IPV4_DST: | |
a1c564be AZ |
1275 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_dst, |
1276 | nla_get_be32(a), is_mask); | |
9b405f1a PS |
1277 | break; |
1278 | case OVS_TUNNEL_KEY_ATTR_TOS: | |
a1c564be AZ |
1279 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_tos, |
1280 | nla_get_u8(a), is_mask); | |
9b405f1a PS |
1281 | break; |
1282 | case OVS_TUNNEL_KEY_ATTR_TTL: | |
a1c564be AZ |
1283 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_ttl, |
1284 | nla_get_u8(a), is_mask); | |
9b405f1a PS |
1285 | ttl = true; |
1286 | break; | |
1287 | case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT: | |
5ebaf571 | 1288 | tun_flags |= TUNNEL_DONT_FRAGMENT; |
9b405f1a PS |
1289 | break; |
1290 | case OVS_TUNNEL_KEY_ATTR_CSUM: | |
5ebaf571 | 1291 | tun_flags |= TUNNEL_CSUM; |
9b405f1a PS |
1292 | break; |
1293 | default: | |
1294 | return -EINVAL; | |
9b405f1a PS |
1295 | } |
1296 | } | |
a1c564be AZ |
1297 | |
1298 | SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask); | |
1299 | ||
1b936472 AZ |
1300 | if (rem > 0) { |
1301 | OVS_NLERR("IPv4 tunnel attribute has %d unknown bytes.\n", rem); | |
9b405f1a | 1302 | return -EINVAL; |
1b936472 | 1303 | } |
9b405f1a | 1304 | |
01fcdfc6 JG |
1305 | if (!is_mask) { |
1306 | if (!match->key->tun_key.ipv4_dst) { | |
1307 | OVS_NLERR("IPv4 tunnel destination address is zero.\n"); | |
1308 | return -EINVAL; | |
1309 | } | |
9b405f1a | 1310 | |
01fcdfc6 JG |
1311 | if (!ttl) { |
1312 | OVS_NLERR("IPv4 tunnel TTL not specified.\n"); | |
1313 | return -EINVAL; | |
1314 | } | |
1b936472 | 1315 | } |
9b405f1a PS |
1316 | |
1317 | return 0; | |
1318 | } | |
1319 | ||
54cc3ec6 JG |
1320 | int ovs_ipv4_tun_to_nlattr(struct sk_buff *skb, |
1321 | const struct ovs_key_ipv4_tunnel *tun_key, | |
1322 | const struct ovs_key_ipv4_tunnel *output) | |
9b405f1a PS |
1323 | { |
1324 | struct nlattr *nla; | |
1325 | ||
1326 | nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL); | |
1327 | if (!nla) | |
1328 | return -EMSGSIZE; | |
1329 | ||
04b13268 | 1330 | if (output->tun_flags & TUNNEL_KEY && |
a1c564be | 1331 | nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id)) |
9b405f1a | 1332 | return -EMSGSIZE; |
04b13268 AZ |
1333 | if (output->ipv4_src && |
1334 | nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, output->ipv4_src)) | |
9b405f1a | 1335 | return -EMSGSIZE; |
04b13268 AZ |
1336 | if (output->ipv4_dst && |
1337 | nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST, output->ipv4_dst)) | |
9b405f1a | 1338 | return -EMSGSIZE; |
04b13268 AZ |
1339 | if (output->ipv4_tos && |
1340 | nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->ipv4_tos)) | |
9b405f1a | 1341 | return -EMSGSIZE; |
aa20ff9d | 1342 | if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ipv4_ttl)) |
9b405f1a | 1343 | return -EMSGSIZE; |
04b13268 | 1344 | if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) && |
9b405f1a PS |
1345 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT)) |
1346 | return -EMSGSIZE; | |
04b13268 | 1347 | if ((output->tun_flags & TUNNEL_CSUM) && |
9b405f1a PS |
1348 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM)) |
1349 | return -EMSGSIZE; | |
1350 | ||
1351 | nla_nest_end(skb, nla); | |
1352 | return 0; | |
1353 | } | |
1354 | ||
36956a7d | 1355 | |
a1c564be AZ |
1356 | static int metadata_from_nlattrs(struct sw_flow_match *match, u64 *attrs, |
1357 | const struct nlattr **a, bool is_mask) | |
1358 | { | |
1359 | if (*attrs & (1ULL << OVS_KEY_ATTR_PRIORITY)) { | |
1360 | SW_FLOW_KEY_PUT(match, phy.priority, | |
1361 | nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask); | |
1362 | *attrs &= ~(1ULL << OVS_KEY_ATTR_PRIORITY); | |
34118cae | 1363 | } |
a1c564be AZ |
1364 | |
1365 | if (*attrs & (1ULL << OVS_KEY_ATTR_IN_PORT)) { | |
34118cae | 1366 | u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]); |
a1c564be | 1367 | |
202c1051 AZ |
1368 | if (is_mask) |
1369 | in_port = 0xffffffff; /* Always exact match in_port. */ | |
1370 | else if (in_port >= DP_MAX_PORTS) | |
34118cae | 1371 | return -EINVAL; |
202c1051 | 1372 | |
a1c564be AZ |
1373 | SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask); |
1374 | *attrs &= ~(1ULL << OVS_KEY_ATTR_IN_PORT); | |
861687d4 JG |
1375 | } else if (!is_mask) { |
1376 | SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask); | |
34118cae | 1377 | } |
a1c564be AZ |
1378 | |
1379 | if (*attrs & (1ULL << OVS_KEY_ATTR_SKB_MARK)) { | |
72e8bf28 | 1380 | uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]); |
3025a772 | 1381 | |
a1c564be AZ |
1382 | SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask); |
1383 | *attrs &= ~(1ULL << OVS_KEY_ATTR_SKB_MARK); | |
1384 | } | |
1385 | if (*attrs & (1ULL << OVS_KEY_ATTR_TUNNEL)) { | |
54cc3ec6 | 1386 | if (ovs_ipv4_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match, |
a1c564be AZ |
1387 | is_mask)) |
1388 | return -EINVAL; | |
1389 | *attrs &= ~(1ULL << OVS_KEY_ATTR_TUNNEL); | |
72e8bf28 | 1390 | } |
a1c564be AZ |
1391 | return 0; |
1392 | } | |
36956a7d | 1393 | |
a1c564be AZ |
1394 | static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs, |
1395 | const struct nlattr **a, bool is_mask) | |
1396 | { | |
1397 | int err; | |
828f5f64 | 1398 | u64 orig_attrs = attrs; |
5c7f5883 | 1399 | |
a1c564be AZ |
1400 | err = metadata_from_nlattrs(match, &attrs, a, is_mask); |
1401 | if (err) | |
1402 | return err; | |
76abe283 | 1403 | |
a1c564be AZ |
1404 | if (attrs & (1ULL << OVS_KEY_ATTR_ETHERNET)) { |
1405 | const struct ovs_key_ethernet *eth_key; | |
36956a7d | 1406 | |
a1c564be AZ |
1407 | eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]); |
1408 | SW_FLOW_KEY_MEMCPY(match, eth.src, | |
1409 | eth_key->eth_src, ETH_ALEN, is_mask); | |
1410 | SW_FLOW_KEY_MEMCPY(match, eth.dst, | |
1411 | eth_key->eth_dst, ETH_ALEN, is_mask); | |
1412 | attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERNET); | |
1413 | } | |
76abe283 | 1414 | |
a1c564be | 1415 | if (attrs & (1ULL << OVS_KEY_ATTR_VLAN)) { |
8ddc056d BP |
1416 | __be16 tci; |
1417 | ||
a1c564be | 1418 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); |
62f13eb2 AZ |
1419 | if (!(tci & htons(VLAN_TAG_PRESENT))) { |
1420 | if (is_mask) | |
1421 | OVS_NLERR("VLAN TCI mask does not have exact match for VLAN_TAG_PRESENT bit.\n"); | |
1422 | else | |
1b936472 | 1423 | OVS_NLERR("VLAN TCI does not have VLAN_TAG_PRESENT bit set.\n"); |
62f13eb2 AZ |
1424 | |
1425 | return -EINVAL; | |
1426 | } | |
36956a7d | 1427 | |
a1c564be AZ |
1428 | SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask); |
1429 | attrs &= ~(1ULL << OVS_KEY_ATTR_VLAN); | |
62f13eb2 AZ |
1430 | } else if (!is_mask) |
1431 | SW_FLOW_KEY_PUT(match, eth.tci, htons(0xffff), true); | |
8ddc056d | 1432 | |
a1c564be AZ |
1433 | if (attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)) { |
1434 | __be16 eth_type; | |
8ddc056d | 1435 | |
a1c564be | 1436 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); |
33fd9f59 AZ |
1437 | if (is_mask) { |
1438 | /* Always exact match EtherType. */ | |
1439 | eth_type = htons(0xffff); | |
1440 | } else if (ntohs(eth_type) < ETH_P_802_3_MIN) { | |
e821558d | 1441 | OVS_NLERR("EtherType is less than minimum (type=%x, min=%x).\n", |
1b936472 | 1442 | ntohs(eth_type), ETH_P_802_3_MIN); |
8ddc056d | 1443 | return -EINVAL; |
1b936472 | 1444 | } |
a1c564be AZ |
1445 | |
1446 | SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask); | |
1447 | attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE); | |
1448 | } else if (!is_mask) { | |
1449 | SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask); | |
34118cae BP |
1450 | } |
1451 | ||
a1c564be AZ |
1452 | if (attrs & (1ULL << OVS_KEY_ATTR_IPV4)) { |
1453 | const struct ovs_key_ipv4 *ipv4_key; | |
1454 | ||
1455 | ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]); | |
1b936472 AZ |
1456 | if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) { |
1457 | OVS_NLERR("Unknown IPv4 fragment type (value=%d, max=%d).\n", | |
1458 | ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX); | |
34118cae | 1459 | return -EINVAL; |
1b936472 | 1460 | } |
a1c564be AZ |
1461 | SW_FLOW_KEY_PUT(match, ip.proto, |
1462 | ipv4_key->ipv4_proto, is_mask); | |
1463 | SW_FLOW_KEY_PUT(match, ip.tos, | |
1464 | ipv4_key->ipv4_tos, is_mask); | |
1465 | SW_FLOW_KEY_PUT(match, ip.ttl, | |
1466 | ipv4_key->ipv4_ttl, is_mask); | |
1467 | SW_FLOW_KEY_PUT(match, ip.frag, | |
1468 | ipv4_key->ipv4_frag, is_mask); | |
1469 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, | |
1470 | ipv4_key->ipv4_src, is_mask); | |
1471 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, | |
1472 | ipv4_key->ipv4_dst, is_mask); | |
1473 | attrs &= ~(1ULL << OVS_KEY_ATTR_IPV4); | |
34118cae BP |
1474 | } |
1475 | ||
a1c564be AZ |
1476 | if (attrs & (1ULL << OVS_KEY_ATTR_IPV6)) { |
1477 | const struct ovs_key_ipv6 *ipv6_key; | |
685a51a5 | 1478 | |
a1c564be | 1479 | ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]); |
1b936472 AZ |
1480 | if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) { |
1481 | OVS_NLERR("Unknown IPv6 fragment type (value=%d, max=%d).\n", | |
1482 | ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX); | |
34118cae | 1483 | return -EINVAL; |
1b936472 | 1484 | } |
a1c564be AZ |
1485 | SW_FLOW_KEY_PUT(match, ipv6.label, |
1486 | ipv6_key->ipv6_label, is_mask); | |
1487 | SW_FLOW_KEY_PUT(match, ip.proto, | |
1488 | ipv6_key->ipv6_proto, is_mask); | |
1489 | SW_FLOW_KEY_PUT(match, ip.tos, | |
1490 | ipv6_key->ipv6_tclass, is_mask); | |
1491 | SW_FLOW_KEY_PUT(match, ip.ttl, | |
1492 | ipv6_key->ipv6_hlimit, is_mask); | |
1493 | SW_FLOW_KEY_PUT(match, ip.frag, | |
1494 | ipv6_key->ipv6_frag, is_mask); | |
1495 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src, | |
1496 | ipv6_key->ipv6_src, | |
1497 | sizeof(match->key->ipv6.addr.src), | |
1498 | is_mask); | |
1499 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst, | |
1500 | ipv6_key->ipv6_dst, | |
1501 | sizeof(match->key->ipv6.addr.dst), | |
1502 | is_mask); | |
1503 | ||
1504 | attrs &= ~(1ULL << OVS_KEY_ATTR_IPV6); | |
1505 | } | |
34118cae | 1506 | |
a1c564be AZ |
1507 | if (attrs & (1ULL << OVS_KEY_ATTR_ARP)) { |
1508 | const struct ovs_key_arp *arp_key; | |
1509 | ||
1510 | arp_key = nla_data(a[OVS_KEY_ATTR_ARP]); | |
1b936472 AZ |
1511 | if (!is_mask && (arp_key->arp_op & htons(0xff00))) { |
1512 | OVS_NLERR("Unknown ARP opcode (opcode=%d).\n", | |
1513 | arp_key->arp_op); | |
34118cae | 1514 | return -EINVAL; |
1b936472 | 1515 | } |
a1c564be AZ |
1516 | |
1517 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, | |
1518 | arp_key->arp_sip, is_mask); | |
1519 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, | |
1520 | arp_key->arp_tip, is_mask); | |
1521 | SW_FLOW_KEY_PUT(match, ip.proto, | |
1522 | ntohs(arp_key->arp_op), is_mask); | |
1523 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha, | |
1524 | arp_key->arp_sha, ETH_ALEN, is_mask); | |
1525 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha, | |
1526 | arp_key->arp_tha, ETH_ALEN, is_mask); | |
1527 | ||
1528 | attrs &= ~(1ULL << OVS_KEY_ATTR_ARP); | |
1529 | } | |
1530 | ||
1531 | if (attrs & (1ULL << OVS_KEY_ATTR_TCP)) { | |
1532 | const struct ovs_key_tcp *tcp_key; | |
1533 | ||
1534 | tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]); | |
828f5f64 JP |
1535 | if (orig_attrs & (1ULL << OVS_KEY_ATTR_IPV4)) { |
1536 | SW_FLOW_KEY_PUT(match, ipv4.tp.src, | |
1537 | tcp_key->tcp_src, is_mask); | |
1538 | SW_FLOW_KEY_PUT(match, ipv4.tp.dst, | |
1539 | tcp_key->tcp_dst, is_mask); | |
1540 | } else { | |
1541 | SW_FLOW_KEY_PUT(match, ipv6.tp.src, | |
1542 | tcp_key->tcp_src, is_mask); | |
1543 | SW_FLOW_KEY_PUT(match, ipv6.tp.dst, | |
1544 | tcp_key->tcp_dst, is_mask); | |
1545 | } | |
a1c564be AZ |
1546 | attrs &= ~(1ULL << OVS_KEY_ATTR_TCP); |
1547 | } | |
1548 | ||
1549 | if (attrs & (1ULL << OVS_KEY_ATTR_UDP)) { | |
1550 | const struct ovs_key_udp *udp_key; | |
1551 | ||
1552 | udp_key = nla_data(a[OVS_KEY_ATTR_UDP]); | |
828f5f64 JP |
1553 | if (orig_attrs & (1ULL << OVS_KEY_ATTR_IPV4)) { |
1554 | SW_FLOW_KEY_PUT(match, ipv4.tp.src, | |
1555 | udp_key->udp_src, is_mask); | |
1556 | SW_FLOW_KEY_PUT(match, ipv4.tp.dst, | |
1557 | udp_key->udp_dst, is_mask); | |
1558 | } else { | |
1559 | SW_FLOW_KEY_PUT(match, ipv6.tp.src, | |
1560 | udp_key->udp_src, is_mask); | |
1561 | SW_FLOW_KEY_PUT(match, ipv6.tp.dst, | |
1562 | udp_key->udp_dst, is_mask); | |
1563 | } | |
a1c564be AZ |
1564 | attrs &= ~(1ULL << OVS_KEY_ATTR_UDP); |
1565 | } | |
1566 | ||
10f72e3d JS |
1567 | if (attrs & (1ULL << OVS_KEY_ATTR_SCTP)) { |
1568 | const struct ovs_key_sctp *sctp_key; | |
1569 | ||
1570 | sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]); | |
1571 | if (orig_attrs & (1ULL << OVS_KEY_ATTR_IPV4)) { | |
1572 | SW_FLOW_KEY_PUT(match, ipv4.tp.src, | |
1573 | sctp_key->sctp_src, is_mask); | |
1574 | SW_FLOW_KEY_PUT(match, ipv4.tp.dst, | |
1575 | sctp_key->sctp_dst, is_mask); | |
1576 | } else { | |
1577 | SW_FLOW_KEY_PUT(match, ipv6.tp.src, | |
1578 | sctp_key->sctp_src, is_mask); | |
1579 | SW_FLOW_KEY_PUT(match, ipv6.tp.dst, | |
1580 | sctp_key->sctp_dst, is_mask); | |
1581 | } | |
1582 | attrs &= ~(1ULL << OVS_KEY_ATTR_SCTP); | |
1583 | } | |
1584 | ||
a1c564be AZ |
1585 | if (attrs & (1ULL << OVS_KEY_ATTR_ICMP)) { |
1586 | const struct ovs_key_icmp *icmp_key; | |
1587 | ||
1588 | icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]); | |
1589 | SW_FLOW_KEY_PUT(match, ipv4.tp.src, | |
1590 | htons(icmp_key->icmp_type), is_mask); | |
1591 | SW_FLOW_KEY_PUT(match, ipv4.tp.dst, | |
1592 | htons(icmp_key->icmp_code), is_mask); | |
1593 | attrs &= ~(1ULL << OVS_KEY_ATTR_ICMP); | |
1594 | } | |
1595 | ||
1596 | if (attrs & (1ULL << OVS_KEY_ATTR_ICMPV6)) { | |
1597 | const struct ovs_key_icmpv6 *icmpv6_key; | |
1598 | ||
1599 | icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]); | |
1600 | SW_FLOW_KEY_PUT(match, ipv6.tp.src, | |
1601 | htons(icmpv6_key->icmpv6_type), is_mask); | |
1602 | SW_FLOW_KEY_PUT(match, ipv6.tp.dst, | |
1603 | htons(icmpv6_key->icmpv6_code), is_mask); | |
1604 | attrs &= ~(1ULL << OVS_KEY_ATTR_ICMPV6); | |
1605 | } | |
1606 | ||
1607 | if (attrs & (1ULL << OVS_KEY_ATTR_ND)) { | |
1608 | const struct ovs_key_nd *nd_key; | |
1609 | ||
1610 | nd_key = nla_data(a[OVS_KEY_ATTR_ND]); | |
1611 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target, | |
1612 | nd_key->nd_target, | |
1613 | sizeof(match->key->ipv6.nd.target), | |
1614 | is_mask); | |
1615 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll, | |
1616 | nd_key->nd_sll, ETH_ALEN, is_mask); | |
1617 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll, | |
1618 | nd_key->nd_tll, ETH_ALEN, is_mask); | |
1619 | attrs &= ~(1ULL << OVS_KEY_ATTR_ND); | |
1620 | } | |
1621 | ||
1622 | if (attrs != 0) | |
1623 | return -EINVAL; | |
1624 | ||
1625 | return 0; | |
1626 | } | |
1627 | ||
1628 | /** | |
1629 | * ovs_match_from_nlattrs - parses Netlink attributes into a flow key and | |
1630 | * mask. In case the 'mask' is NULL, the flow is treated as exact match | |
1631 | * flow. Otherwise, it is treated as a wildcarded flow, except the mask | |
1632 | * does not include any don't care bit. | |
1633 | * @match: receives the extracted flow match information. | |
1634 | * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute | |
1635 | * sequence. The fields should of the packet that triggered the creation | |
1636 | * of this flow. | |
1637 | * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink | |
1638 | * attribute specifies the mask field of the wildcarded flow. | |
1639 | */ | |
1640 | int ovs_match_from_nlattrs(struct sw_flow_match *match, | |
1641 | const struct nlattr *key, | |
1642 | const struct nlattr *mask) | |
1643 | { | |
1644 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; | |
a1c564be AZ |
1645 | const struct nlattr *encap; |
1646 | u64 key_attrs = 0; | |
1647 | u64 mask_attrs = 0; | |
1648 | bool encap_valid = false; | |
1649 | int err; | |
1650 | ||
1651 | err = parse_flow_nlattrs(key, a, &key_attrs); | |
1652 | if (err) | |
1653 | return err; | |
1654 | ||
799fe147 AZ |
1655 | if ((key_attrs & (1ULL << OVS_KEY_ATTR_ETHERNET)) && |
1656 | (key_attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)) && | |
1657 | (nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]) == htons(ETH_P_8021Q))) { | |
1658 | __be16 tci; | |
a1c564be | 1659 | |
799fe147 | 1660 | if (!((key_attrs & (1ULL << OVS_KEY_ATTR_VLAN)) && |
799fe147 AZ |
1661 | (key_attrs & (1ULL << OVS_KEY_ATTR_ENCAP)))) { |
1662 | OVS_NLERR("Invalid Vlan frame.\n"); | |
1663 | return -EINVAL; | |
1664 | } | |
a1c564be | 1665 | |
799fe147 AZ |
1666 | key_attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE); |
1667 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
1668 | encap = a[OVS_KEY_ATTR_ENCAP]; | |
1669 | key_attrs &= ~(1ULL << OVS_KEY_ATTR_ENCAP); | |
1670 | encap_valid = true; | |
a1c564be | 1671 | |
799fe147 AZ |
1672 | if (tci & htons(VLAN_TAG_PRESENT)) { |
1673 | err = parse_flow_nlattrs(encap, a, &key_attrs); | |
34118cae BP |
1674 | if (err) |
1675 | return err; | |
799fe147 AZ |
1676 | } else if (!tci) { |
1677 | /* Corner case for truncated 802.1Q header. */ | |
1678 | if (nla_len(encap)) { | |
1679 | OVS_NLERR("Truncated 802.1Q header has non-zero encap attribute.\n"); | |
1680 | return -EINVAL; | |
1681 | } | |
1682 | } else { | |
1683 | OVS_NLERR("Encap attribute is set for a non-VLAN frame.\n"); | |
1684 | return -EINVAL; | |
36956a7d | 1685 | } |
a1c564be | 1686 | } |
36956a7d | 1687 | |
a1c564be AZ |
1688 | err = ovs_key_from_nlattrs(match, key_attrs, a, false); |
1689 | if (err) | |
1690 | return err; | |
1691 | ||
1692 | if (mask) { | |
1a02b768 | 1693 | err = parse_flow_mask_nlattrs(mask, a, &mask_attrs); |
a1c564be AZ |
1694 | if (err) |
1695 | return err; | |
1696 | ||
799fe147 | 1697 | if (mask_attrs & 1ULL << OVS_KEY_ATTR_ENCAP) { |
a1c564be | 1698 | __be16 eth_type = 0; |
799fe147 AZ |
1699 | __be16 tci = 0; |
1700 | ||
1701 | if (!encap_valid) { | |
1702 | OVS_NLERR("Encap mask attribute is set for non-VLAN frame.\n"); | |
1703 | return -EINVAL; | |
1704 | } | |
a1c564be | 1705 | |
063236f1 | 1706 | mask_attrs &= ~(1ULL << OVS_KEY_ATTR_ENCAP); |
1a02b768 JG |
1707 | if (a[OVS_KEY_ATTR_ETHERTYPE]) |
1708 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
799fe147 | 1709 | |
a1c564be AZ |
1710 | if (eth_type == htons(0xffff)) { |
1711 | mask_attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE); | |
1a02b768 JG |
1712 | encap = a[OVS_KEY_ATTR_ENCAP]; |
1713 | err = parse_flow_mask_nlattrs(encap, a, &mask_attrs); | |
1b936472 | 1714 | } else { |
799fe147 AZ |
1715 | OVS_NLERR("VLAN frames must have an exact match on the TPID (mask=%x).\n", |
1716 | ntohs(eth_type)); | |
1717 | return -EINVAL; | |
1b936472 | 1718 | } |
34118cae | 1719 | |
799fe147 AZ |
1720 | if (a[OVS_KEY_ATTR_VLAN]) |
1721 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
1722 | ||
1723 | if (!(tci & htons(VLAN_TAG_PRESENT))) { | |
1724 | OVS_NLERR("VLAN tag present bit must have an exact match (tci_mask=%x).\n", ntohs(tci)); | |
1725 | return -EINVAL; | |
1726 | } | |
34118cae | 1727 | } |
36956a7d | 1728 | |
1a02b768 | 1729 | err = ovs_key_from_nlattrs(match, mask_attrs, a, true); |
a1c564be AZ |
1730 | if (err) |
1731 | return err; | |
1732 | } else { | |
1733 | /* Populate exact match flow's key mask. */ | |
1734 | if (match->mask) | |
1735 | ovs_sw_flow_mask_set(match->mask, &match->range, 0xff); | |
34118cae | 1736 | } |
76abe283 | 1737 | |
a1c564be | 1738 | if (!ovs_match_validate(match, key_attrs, mask_attrs)) |
34118cae | 1739 | return -EINVAL; |
34118cae BP |
1740 | |
1741 | return 0; | |
36956a7d BP |
1742 | } |
1743 | ||
80e5eed9 | 1744 | /** |
850b6b3b | 1745 | * ovs_flow_metadata_from_nlattrs - parses Netlink attributes into a flow key. |
c3b36027 | 1746 | * @flow: Receives extracted in_port, priority, tun_key and skb_mark. |
c3b36027 | 1747 | * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute |
80e5eed9 BP |
1748 | * sequence. |
1749 | * | |
1750 | * This parses a series of Netlink attributes that form a flow key, which must | |
1751 | * take the same form accepted by flow_from_nlattrs(), but only enough of it to | |
1752 | * get the metadata, that is, the parts of the flow key that cannot be | |
1753 | * extracted from the packet itself. | |
1754 | */ | |
13e24889 | 1755 | |
a1c564be AZ |
1756 | int ovs_flow_metadata_from_nlattrs(struct sw_flow *flow, |
1757 | const struct nlattr *attr) | |
80e5eed9 | 1758 | { |
6694e498 | 1759 | struct ovs_key_ipv4_tunnel *tun_key = &flow->key.tun_key; |
a1c564be AZ |
1760 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; |
1761 | u64 attrs = 0; | |
1762 | int err; | |
1763 | struct sw_flow_match match; | |
80e5eed9 | 1764 | |
13e24889 PS |
1765 | flow->key.phy.in_port = DP_MAX_PORTS; |
1766 | flow->key.phy.priority = 0; | |
72e8bf28 | 1767 | flow->key.phy.skb_mark = 0; |
6694e498 | 1768 | memset(tun_key, 0, sizeof(flow->key.tun_key)); |
80e5eed9 | 1769 | |
a1c564be AZ |
1770 | err = parse_flow_nlattrs(attr, a, &attrs); |
1771 | if (err) | |
80e5eed9 | 1772 | return -EINVAL; |
13e24889 | 1773 | |
46d4c97f JG |
1774 | memset(&match, 0, sizeof(match)); |
1775 | match.key = &flow->key; | |
a1c564be AZ |
1776 | |
1777 | err = metadata_from_nlattrs(&match, &attrs, a, false); | |
1778 | if (err) | |
1779 | return err; | |
13e24889 | 1780 | |
80e5eed9 BP |
1781 | return 0; |
1782 | } | |
1783 | ||
a1c564be AZ |
1784 | int ovs_flow_to_nlattrs(const struct sw_flow_key *swkey, |
1785 | const struct sw_flow_key *output, struct sk_buff *skb) | |
36956a7d | 1786 | { |
df2c07f4 | 1787 | struct ovs_key_ethernet *eth_key; |
fea393b1 | 1788 | struct nlattr *nla, *encap; |
a583e032 | 1789 | bool is_mask = (swkey != output); |
36956a7d | 1790 | |
dd62b991 | 1791 | if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority)) |
c3cc8c03 | 1792 | goto nla_put_failure; |
18c43631 | 1793 | |
01fcdfc6 | 1794 | if ((swkey->tun_key.ipv4_dst || is_mask) && |
54cc3ec6 | 1795 | ovs_ipv4_tun_to_nlattr(skb, &swkey->tun_key, &output->tun_key)) |
9b405f1a PS |
1796 | goto nla_put_failure; |
1797 | ||
04b13268 | 1798 | if (swkey->phy.in_port == DP_MAX_PORTS) { |
a583e032 | 1799 | if (is_mask && (output->phy.in_port == 0xffff)) |
04b13268 AZ |
1800 | if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff)) |
1801 | goto nla_put_failure; | |
1802 | } else { | |
a1c564be | 1803 | u16 upper_u16; |
a583e032 | 1804 | upper_u16 = !is_mask ? 0 : 0xffff; |
a1c564be AZ |
1805 | |
1806 | if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, | |
04b13268 | 1807 | (upper_u16 << 16) | output->phy.in_port)) |
a1c564be AZ |
1808 | goto nla_put_failure; |
1809 | } | |
36956a7d | 1810 | |
dd62b991 | 1811 | if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark)) |
72e8bf28 AA |
1812 | goto nla_put_failure; |
1813 | ||
df2c07f4 | 1814 | nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key)); |
d6569377 BP |
1815 | if (!nla) |
1816 | goto nla_put_failure; | |
a1c564be | 1817 | |
d6569377 | 1818 | eth_key = nla_data(nla); |
a1c564be AZ |
1819 | memcpy(eth_key->eth_src, output->eth.src, ETH_ALEN); |
1820 | memcpy(eth_key->eth_dst, output->eth.dst, ETH_ALEN); | |
36956a7d | 1821 | |
8ddc056d | 1822 | if (swkey->eth.tci || swkey->eth.type == htons(ETH_P_8021Q)) { |
a1c564be | 1823 | __be16 eth_type; |
a583e032 | 1824 | eth_type = !is_mask ? htons(ETH_P_8021Q) : htons(0xffff); |
a1c564be AZ |
1825 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) || |
1826 | nla_put_be16(skb, OVS_KEY_ATTR_VLAN, output->eth.tci)) | |
c3cc8c03 | 1827 | goto nla_put_failure; |
fea393b1 | 1828 | encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP); |
8ddc056d BP |
1829 | if (!swkey->eth.tci) |
1830 | goto unencap; | |
a1c564be | 1831 | } else |
fea393b1 | 1832 | encap = NULL; |
36956a7d | 1833 | |
04b13268 AZ |
1834 | if (swkey->eth.type == htons(ETH_P_802_2)) { |
1835 | /* | |
1836 | * Ethertype 802.2 is represented in the netlink with omitted | |
1837 | * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and | |
1838 | * 0xffff in the mask attribute. Ethertype can also | |
1839 | * be wildcarded. | |
1840 | */ | |
a583e032 | 1841 | if (is_mask && output->eth.type) |
04b13268 AZ |
1842 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, |
1843 | output->eth.type)) | |
1844 | goto nla_put_failure; | |
fea393b1 | 1845 | goto unencap; |
04b13268 | 1846 | } |
36956a7d | 1847 | |
04b13268 AZ |
1848 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type)) |
1849 | goto nla_put_failure; | |
36956a7d | 1850 | |
76abe283 | 1851 | if (swkey->eth.type == htons(ETH_P_IP)) { |
df2c07f4 | 1852 | struct ovs_key_ipv4 *ipv4_key; |
36956a7d | 1853 | |
df2c07f4 | 1854 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key)); |
d6569377 BP |
1855 | if (!nla) |
1856 | goto nla_put_failure; | |
1857 | ipv4_key = nla_data(nla); | |
a1c564be AZ |
1858 | ipv4_key->ipv4_src = output->ipv4.addr.src; |
1859 | ipv4_key->ipv4_dst = output->ipv4.addr.dst; | |
1860 | ipv4_key->ipv4_proto = output->ip.proto; | |
1861 | ipv4_key->ipv4_tos = output->ip.tos; | |
1862 | ipv4_key->ipv4_ttl = output->ip.ttl; | |
1863 | ipv4_key->ipv4_frag = output->ip.frag; | |
76abe283 | 1864 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { |
df2c07f4 | 1865 | struct ovs_key_ipv6 *ipv6_key; |
d31f1109 | 1866 | |
df2c07f4 | 1867 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key)); |
d31f1109 JP |
1868 | if (!nla) |
1869 | goto nla_put_failure; | |
1870 | ipv6_key = nla_data(nla); | |
a1c564be | 1871 | memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src, |
d31f1109 | 1872 | sizeof(ipv6_key->ipv6_src)); |
a1c564be | 1873 | memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst, |
d31f1109 | 1874 | sizeof(ipv6_key->ipv6_dst)); |
a1c564be AZ |
1875 | ipv6_key->ipv6_label = output->ipv6.label; |
1876 | ipv6_key->ipv6_proto = output->ip.proto; | |
1877 | ipv6_key->ipv6_tclass = output->ip.tos; | |
1878 | ipv6_key->ipv6_hlimit = output->ip.ttl; | |
1879 | ipv6_key->ipv6_frag = output->ip.frag; | |
8087f5ff MM |
1880 | } else if (swkey->eth.type == htons(ETH_P_ARP) || |
1881 | swkey->eth.type == htons(ETH_P_RARP)) { | |
df2c07f4 | 1882 | struct ovs_key_arp *arp_key; |
d31f1109 | 1883 | |
df2c07f4 | 1884 | nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key)); |
d31f1109 JP |
1885 | if (!nla) |
1886 | goto nla_put_failure; | |
1887 | arp_key = nla_data(nla); | |
df2c07f4 | 1888 | memset(arp_key, 0, sizeof(struct ovs_key_arp)); |
a1c564be AZ |
1889 | arp_key->arp_sip = output->ipv4.addr.src; |
1890 | arp_key->arp_tip = output->ipv4.addr.dst; | |
1891 | arp_key->arp_op = htons(output->ip.proto); | |
1892 | memcpy(arp_key->arp_sha, output->ipv4.arp.sha, ETH_ALEN); | |
1893 | memcpy(arp_key->arp_tha, output->ipv4.arp.tha, ETH_ALEN); | |
d31f1109 JP |
1894 | } |
1895 | ||
7257b535 BP |
1896 | if ((swkey->eth.type == htons(ETH_P_IP) || |
1897 | swkey->eth.type == htons(ETH_P_IPV6)) && | |
9e44d715 | 1898 | swkey->ip.frag != OVS_FRAG_TYPE_LATER) { |
36956a7d | 1899 | |
28bad473 | 1900 | if (swkey->ip.proto == IPPROTO_TCP) { |
df2c07f4 | 1901 | struct ovs_key_tcp *tcp_key; |
36956a7d | 1902 | |
df2c07f4 | 1903 | nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key)); |
d6569377 BP |
1904 | if (!nla) |
1905 | goto nla_put_failure; | |
1906 | tcp_key = nla_data(nla); | |
76abe283 | 1907 | if (swkey->eth.type == htons(ETH_P_IP)) { |
a1c564be AZ |
1908 | tcp_key->tcp_src = output->ipv4.tp.src; |
1909 | tcp_key->tcp_dst = output->ipv4.tp.dst; | |
76abe283 | 1910 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { |
a1c564be AZ |
1911 | tcp_key->tcp_src = output->ipv6.tp.src; |
1912 | tcp_key->tcp_dst = output->ipv6.tp.dst; | |
76abe283 | 1913 | } |
28bad473 | 1914 | } else if (swkey->ip.proto == IPPROTO_UDP) { |
df2c07f4 | 1915 | struct ovs_key_udp *udp_key; |
36956a7d | 1916 | |
df2c07f4 | 1917 | nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key)); |
d6569377 BP |
1918 | if (!nla) |
1919 | goto nla_put_failure; | |
1920 | udp_key = nla_data(nla); | |
76abe283 | 1921 | if (swkey->eth.type == htons(ETH_P_IP)) { |
a1c564be AZ |
1922 | udp_key->udp_src = output->ipv4.tp.src; |
1923 | udp_key->udp_dst = output->ipv4.tp.dst; | |
76abe283 | 1924 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { |
a1c564be AZ |
1925 | udp_key->udp_src = output->ipv6.tp.src; |
1926 | udp_key->udp_dst = output->ipv6.tp.dst; | |
76abe283 | 1927 | } |
10f72e3d JS |
1928 | } else if (swkey->ip.proto == IPPROTO_SCTP) { |
1929 | struct ovs_key_sctp *sctp_key; | |
1930 | ||
1931 | nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key)); | |
1932 | if (!nla) | |
1933 | goto nla_put_failure; | |
1934 | sctp_key = nla_data(nla); | |
1935 | if (swkey->eth.type == htons(ETH_P_IP)) { | |
1936 | sctp_key->sctp_src = swkey->ipv4.tp.src; | |
1937 | sctp_key->sctp_dst = swkey->ipv4.tp.dst; | |
1938 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { | |
1939 | sctp_key->sctp_src = swkey->ipv6.tp.src; | |
1940 | sctp_key->sctp_dst = swkey->ipv6.tp.dst; | |
1941 | } | |
76abe283 | 1942 | } else if (swkey->eth.type == htons(ETH_P_IP) && |
28bad473 | 1943 | swkey->ip.proto == IPPROTO_ICMP) { |
df2c07f4 | 1944 | struct ovs_key_icmp *icmp_key; |
36956a7d | 1945 | |
df2c07f4 | 1946 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key)); |
d6569377 BP |
1947 | if (!nla) |
1948 | goto nla_put_failure; | |
1949 | icmp_key = nla_data(nla); | |
a1c564be AZ |
1950 | icmp_key->icmp_type = ntohs(output->ipv4.tp.src); |
1951 | icmp_key->icmp_code = ntohs(output->ipv4.tp.dst); | |
76abe283 | 1952 | } else if (swkey->eth.type == htons(ETH_P_IPV6) && |
28bad473 | 1953 | swkey->ip.proto == IPPROTO_ICMPV6) { |
df2c07f4 | 1954 | struct ovs_key_icmpv6 *icmpv6_key; |
36956a7d | 1955 | |
df2c07f4 | 1956 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6, |
bfef4717 | 1957 | sizeof(*icmpv6_key)); |
d31f1109 JP |
1958 | if (!nla) |
1959 | goto nla_put_failure; | |
1960 | icmpv6_key = nla_data(nla); | |
a1c564be AZ |
1961 | icmpv6_key->icmpv6_type = ntohs(output->ipv6.tp.src); |
1962 | icmpv6_key->icmpv6_code = ntohs(output->ipv6.tp.dst); | |
685a51a5 | 1963 | |
bfef4717 JG |
1964 | if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION || |
1965 | icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) { | |
df2c07f4 | 1966 | struct ovs_key_nd *nd_key; |
685a51a5 | 1967 | |
df2c07f4 | 1968 | nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key)); |
685a51a5 JP |
1969 | if (!nla) |
1970 | goto nla_put_failure; | |
1971 | nd_key = nla_data(nla); | |
a1c564be | 1972 | memcpy(nd_key->nd_target, &output->ipv6.nd.target, |
685a51a5 | 1973 | sizeof(nd_key->nd_target)); |
a1c564be AZ |
1974 | memcpy(nd_key->nd_sll, output->ipv6.nd.sll, ETH_ALEN); |
1975 | memcpy(nd_key->nd_tll, output->ipv6.nd.tll, ETH_ALEN); | |
685a51a5 | 1976 | } |
d31f1109 | 1977 | } |
36956a7d BP |
1978 | } |
1979 | ||
fea393b1 BP |
1980 | unencap: |
1981 | if (encap) | |
1982 | nla_nest_end(skb, encap); | |
1983 | ||
d6569377 | 1984 | return 0; |
36956a7d | 1985 | |
d6569377 BP |
1986 | nla_put_failure: |
1987 | return -EMSGSIZE; | |
8d5ebd83 JG |
1988 | } |
1989 | ||
064af421 BP |
1990 | /* Initializes the flow module. |
1991 | * Returns zero if successful or a negative error code. */ | |
850b6b3b | 1992 | int ovs_flow_init(void) |
064af421 | 1993 | { |
9a6fe4c1 | 1994 | BUILD_BUG_ON(__alignof__(struct sw_flow_key) % __alignof__(long)); |
c2dd5e99 AZ |
1995 | BUILD_BUG_ON(sizeof(struct sw_flow_key) % sizeof(long)); |
1996 | ||
064af421 BP |
1997 | flow_cache = kmem_cache_create("sw_flow", sizeof(struct sw_flow), 0, |
1998 | 0, NULL); | |
1999 | if (flow_cache == NULL) | |
2000 | return -ENOMEM; | |
2001 | ||
2002 | return 0; | |
2003 | } | |
2004 | ||
2005 | /* Uninitializes the flow module. */ | |
850b6b3b | 2006 | void ovs_flow_exit(void) |
064af421 BP |
2007 | { |
2008 | kmem_cache_destroy(flow_cache); | |
2009 | } | |
a1c564be AZ |
2010 | |
2011 | struct sw_flow_mask *ovs_sw_flow_mask_alloc(void) | |
2012 | { | |
2013 | struct sw_flow_mask *mask; | |
2014 | ||
2015 | mask = kmalloc(sizeof(*mask), GFP_KERNEL); | |
2016 | if (mask) | |
2017 | mask->ref_count = 0; | |
2018 | ||
2019 | return mask; | |
2020 | } | |
2021 | ||
2022 | void ovs_sw_flow_mask_add_ref(struct sw_flow_mask *mask) | |
2023 | { | |
2024 | mask->ref_count++; | |
2025 | } | |
2026 | ||
2027 | static void rcu_free_sw_flow_mask_cb(struct rcu_head *rcu) | |
2028 | { | |
2029 | struct sw_flow_mask *mask = container_of(rcu, struct sw_flow_mask, rcu); | |
2030 | ||
2031 | kfree(mask); | |
2032 | } | |
2033 | ||
2034 | void ovs_sw_flow_mask_del_ref(struct sw_flow_mask *mask, bool deferred) | |
2035 | { | |
2036 | if (!mask) | |
2037 | return; | |
2038 | ||
2039 | BUG_ON(!mask->ref_count); | |
2040 | mask->ref_count--; | |
2041 | ||
2042 | if (!mask->ref_count) { | |
2043 | list_del_rcu(&mask->list); | |
2044 | if (deferred) | |
2045 | call_rcu(&mask->rcu, rcu_free_sw_flow_mask_cb); | |
2046 | else | |
2047 | kfree(mask); | |
2048 | } | |
2049 | } | |
2050 | ||
2051 | static bool ovs_sw_flow_mask_equal(const struct sw_flow_mask *a, | |
2052 | const struct sw_flow_mask *b) | |
2053 | { | |
2054 | u8 *a_ = (u8 *)&a->key + a->range.start; | |
2055 | u8 *b_ = (u8 *)&b->key + b->range.start; | |
2056 | ||
2057 | return (a->range.end == b->range.end) | |
2058 | && (a->range.start == b->range.start) | |
c2dd5e99 | 2059 | && (memcmp(a_, b_, range_n_bytes(&a->range)) == 0); |
a1c564be AZ |
2060 | } |
2061 | ||
2062 | struct sw_flow_mask *ovs_sw_flow_mask_find(const struct flow_table *tbl, | |
2063 | const struct sw_flow_mask *mask) | |
2064 | { | |
2065 | struct list_head *ml; | |
2066 | ||
ede77a46 | 2067 | list_for_each(ml, tbl->mask_list) { |
a1c564be AZ |
2068 | struct sw_flow_mask *m; |
2069 | m = container_of(ml, struct sw_flow_mask, list); | |
2070 | if (ovs_sw_flow_mask_equal(mask, m)) | |
2071 | return m; | |
2072 | } | |
2073 | ||
2074 | return NULL; | |
2075 | } | |
2076 | ||
2077 | /** | |
2078 | * add a new mask into the mask list. | |
2079 | * The caller needs to make sure that 'mask' is not the same | |
2080 | * as any masks that are already on the list. | |
2081 | */ | |
2082 | void ovs_sw_flow_mask_insert(struct flow_table *tbl, struct sw_flow_mask *mask) | |
2083 | { | |
ede77a46 | 2084 | list_add_rcu(&mask->list, tbl->mask_list); |
a1c564be AZ |
2085 | } |
2086 | ||
2087 | /** | |
2088 | * Set 'range' fields in the mask to the value of 'val'. | |
2089 | */ | |
2090 | static void ovs_sw_flow_mask_set(struct sw_flow_mask *mask, | |
2091 | struct sw_flow_key_range *range, u8 val) | |
2092 | { | |
2093 | u8 *m = (u8 *)&mask->key + range->start; | |
2094 | ||
2095 | mask->range = *range; | |
c2dd5e99 | 2096 | memset(m, val, range_n_bytes(range)); |
a1c564be | 2097 | } |