Commit | Line | Data |
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ccb1352e | 1 | /* |
03f0d916 | 2 | * Copyright (c) 2007-2013 Nicira, Inc. |
ccb1352e JG |
3 | * |
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 | |
17 | */ | |
18 | ||
19 | #include "flow.h" | |
20 | #include "datapath.h" | |
21 | #include <linux/uaccess.h> | |
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> | |
28 | #include <linux/jhash.h> | |
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> | |
34 | #include <linux/if_arp.h> | |
ccb1352e JG |
35 | #include <linux/ip.h> |
36 | #include <linux/ipv6.h> | |
a175a723 | 37 | #include <linux/sctp.h> |
ccb1352e JG |
38 | #include <linux/tcp.h> |
39 | #include <linux/udp.h> | |
40 | #include <linux/icmp.h> | |
41 | #include <linux/icmpv6.h> | |
42 | #include <linux/rculist.h> | |
43 | #include <net/ip.h> | |
7d5437c7 | 44 | #include <net/ip_tunnels.h> |
ccb1352e JG |
45 | #include <net/ipv6.h> |
46 | #include <net/ndisc.h> | |
47 | ||
48 | static struct kmem_cache *flow_cache; | |
49 | ||
03f0d916 AZ |
50 | static void ovs_sw_flow_mask_set(struct sw_flow_mask *mask, |
51 | struct sw_flow_key_range *range, u8 val); | |
52 | ||
53 | static void update_range__(struct sw_flow_match *match, | |
54 | size_t offset, size_t size, bool is_mask) | |
55 | { | |
56 | struct sw_flow_key_range *range = NULL; | |
5828cd9a AZ |
57 | size_t start = rounddown(offset, sizeof(long)); |
58 | size_t end = roundup(offset + size, sizeof(long)); | |
03f0d916 AZ |
59 | |
60 | if (!is_mask) | |
61 | range = &match->range; | |
62 | else if (match->mask) | |
63 | range = &match->mask->range; | |
64 | ||
65 | if (!range) | |
66 | return; | |
67 | ||
68 | if (range->start == range->end) { | |
69 | range->start = start; | |
70 | range->end = end; | |
71 | return; | |
72 | } | |
73 | ||
74 | if (range->start > start) | |
75 | range->start = start; | |
76 | ||
77 | if (range->end < end) | |
78 | range->end = end; | |
79 | } | |
80 | ||
81 | #define SW_FLOW_KEY_PUT(match, field, value, is_mask) \ | |
82 | do { \ | |
83 | update_range__(match, offsetof(struct sw_flow_key, field), \ | |
84 | sizeof((match)->key->field), is_mask); \ | |
85 | if (is_mask) { \ | |
86 | if ((match)->mask) \ | |
87 | (match)->mask->key.field = value; \ | |
88 | } else { \ | |
89 | (match)->key->field = value; \ | |
90 | } \ | |
91 | } while (0) | |
92 | ||
93 | #define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \ | |
94 | do { \ | |
95 | update_range__(match, offsetof(struct sw_flow_key, field), \ | |
96 | len, is_mask); \ | |
97 | if (is_mask) { \ | |
98 | if ((match)->mask) \ | |
99 | memcpy(&(match)->mask->key.field, value_p, len);\ | |
100 | } else { \ | |
101 | memcpy(&(match)->key->field, value_p, len); \ | |
102 | } \ | |
103 | } while (0) | |
104 | ||
5828cd9a AZ |
105 | static u16 range_n_bytes(const struct sw_flow_key_range *range) |
106 | { | |
107 | return range->end - range->start; | |
108 | } | |
109 | ||
03f0d916 AZ |
110 | void ovs_match_init(struct sw_flow_match *match, |
111 | struct sw_flow_key *key, | |
112 | struct sw_flow_mask *mask) | |
113 | { | |
114 | memset(match, 0, sizeof(*match)); | |
115 | match->key = key; | |
116 | match->mask = mask; | |
117 | ||
118 | memset(key, 0, sizeof(*key)); | |
119 | ||
120 | if (mask) { | |
121 | memset(&mask->key, 0, sizeof(mask->key)); | |
122 | mask->range.start = mask->range.end = 0; | |
123 | } | |
124 | } | |
125 | ||
126 | static bool ovs_match_validate(const struct sw_flow_match *match, | |
127 | u64 key_attrs, u64 mask_attrs) | |
128 | { | |
129 | u64 key_expected = 1 << OVS_KEY_ATTR_ETHERNET; | |
130 | u64 mask_allowed = key_attrs; /* At most allow all key attributes */ | |
131 | ||
132 | /* The following mask attributes allowed only if they | |
133 | * pass the validation tests. */ | |
134 | mask_allowed &= ~((1 << OVS_KEY_ATTR_IPV4) | |
135 | | (1 << OVS_KEY_ATTR_IPV6) | |
136 | | (1 << OVS_KEY_ATTR_TCP) | |
137 | | (1 << OVS_KEY_ATTR_UDP) | |
a175a723 | 138 | | (1 << OVS_KEY_ATTR_SCTP) |
03f0d916 AZ |
139 | | (1 << OVS_KEY_ATTR_ICMP) |
140 | | (1 << OVS_KEY_ATTR_ICMPV6) | |
141 | | (1 << OVS_KEY_ATTR_ARP) | |
142 | | (1 << OVS_KEY_ATTR_ND)); | |
143 | ||
144 | /* Always allowed mask fields. */ | |
145 | mask_allowed |= ((1 << OVS_KEY_ATTR_TUNNEL) | |
146 | | (1 << OVS_KEY_ATTR_IN_PORT) | |
147 | | (1 << OVS_KEY_ATTR_ETHERTYPE)); | |
148 | ||
149 | /* Check key attributes. */ | |
150 | if (match->key->eth.type == htons(ETH_P_ARP) | |
151 | || match->key->eth.type == htons(ETH_P_RARP)) { | |
152 | key_expected |= 1 << OVS_KEY_ATTR_ARP; | |
153 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
154 | mask_allowed |= 1 << OVS_KEY_ATTR_ARP; | |
155 | } | |
156 | ||
157 | if (match->key->eth.type == htons(ETH_P_IP)) { | |
158 | key_expected |= 1 << OVS_KEY_ATTR_IPV4; | |
159 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
160 | mask_allowed |= 1 << OVS_KEY_ATTR_IPV4; | |
161 | ||
162 | if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { | |
163 | if (match->key->ip.proto == IPPROTO_UDP) { | |
164 | key_expected |= 1 << OVS_KEY_ATTR_UDP; | |
165 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
166 | mask_allowed |= 1 << OVS_KEY_ATTR_UDP; | |
167 | } | |
168 | ||
a175a723 JS |
169 | if (match->key->ip.proto == IPPROTO_SCTP) { |
170 | key_expected |= 1 << OVS_KEY_ATTR_SCTP; | |
171 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
172 | mask_allowed |= 1 << OVS_KEY_ATTR_SCTP; | |
173 | } | |
174 | ||
03f0d916 AZ |
175 | if (match->key->ip.proto == IPPROTO_TCP) { |
176 | key_expected |= 1 << OVS_KEY_ATTR_TCP; | |
177 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
178 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP; | |
179 | } | |
180 | ||
181 | if (match->key->ip.proto == IPPROTO_ICMP) { | |
182 | key_expected |= 1 << OVS_KEY_ATTR_ICMP; | |
183 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
184 | mask_allowed |= 1 << OVS_KEY_ATTR_ICMP; | |
185 | } | |
186 | } | |
187 | } | |
188 | ||
189 | if (match->key->eth.type == htons(ETH_P_IPV6)) { | |
190 | key_expected |= 1 << OVS_KEY_ATTR_IPV6; | |
191 | if (match->mask && (match->mask->key.eth.type == htons(0xffff))) | |
192 | mask_allowed |= 1 << OVS_KEY_ATTR_IPV6; | |
193 | ||
194 | if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { | |
195 | if (match->key->ip.proto == IPPROTO_UDP) { | |
196 | key_expected |= 1 << OVS_KEY_ATTR_UDP; | |
197 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
198 | mask_allowed |= 1 << OVS_KEY_ATTR_UDP; | |
199 | } | |
200 | ||
a175a723 JS |
201 | if (match->key->ip.proto == IPPROTO_SCTP) { |
202 | key_expected |= 1 << OVS_KEY_ATTR_SCTP; | |
203 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
204 | mask_allowed |= 1 << OVS_KEY_ATTR_SCTP; | |
205 | } | |
206 | ||
03f0d916 AZ |
207 | if (match->key->ip.proto == IPPROTO_TCP) { |
208 | key_expected |= 1 << OVS_KEY_ATTR_TCP; | |
209 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
210 | mask_allowed |= 1 << OVS_KEY_ATTR_TCP; | |
211 | } | |
212 | ||
213 | if (match->key->ip.proto == IPPROTO_ICMPV6) { | |
214 | key_expected |= 1 << OVS_KEY_ATTR_ICMPV6; | |
215 | if (match->mask && (match->mask->key.ip.proto == 0xff)) | |
216 | mask_allowed |= 1 << OVS_KEY_ATTR_ICMPV6; | |
217 | ||
218 | if (match->key->ipv6.tp.src == | |
219 | htons(NDISC_NEIGHBOUR_SOLICITATION) || | |
220 | match->key->ipv6.tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) { | |
221 | key_expected |= 1 << OVS_KEY_ATTR_ND; | |
222 | if (match->mask && (match->mask->key.ipv6.tp.src == htons(0xffff))) | |
223 | mask_allowed |= 1 << OVS_KEY_ATTR_ND; | |
224 | } | |
225 | } | |
226 | } | |
227 | } | |
228 | ||
229 | if ((key_attrs & key_expected) != key_expected) { | |
230 | /* Key attributes check failed. */ | |
231 | OVS_NLERR("Missing expected key attributes (key_attrs=%llx, expected=%llx).\n", | |
232 | key_attrs, key_expected); | |
233 | return false; | |
234 | } | |
235 | ||
236 | if ((mask_attrs & mask_allowed) != mask_attrs) { | |
237 | /* Mask attributes check failed. */ | |
238 | OVS_NLERR("Contain more than allowed mask fields (mask_attrs=%llx, mask_allowed=%llx).\n", | |
239 | mask_attrs, mask_allowed); | |
240 | return false; | |
241 | } | |
242 | ||
243 | return true; | |
244 | } | |
245 | ||
ccb1352e JG |
246 | static int check_header(struct sk_buff *skb, int len) |
247 | { | |
248 | if (unlikely(skb->len < len)) | |
249 | return -EINVAL; | |
250 | if (unlikely(!pskb_may_pull(skb, len))) | |
251 | return -ENOMEM; | |
252 | return 0; | |
253 | } | |
254 | ||
255 | static bool arphdr_ok(struct sk_buff *skb) | |
256 | { | |
257 | return pskb_may_pull(skb, skb_network_offset(skb) + | |
258 | sizeof(struct arp_eth_header)); | |
259 | } | |
260 | ||
261 | static int check_iphdr(struct sk_buff *skb) | |
262 | { | |
263 | unsigned int nh_ofs = skb_network_offset(skb); | |
264 | unsigned int ip_len; | |
265 | int err; | |
266 | ||
267 | err = check_header(skb, nh_ofs + sizeof(struct iphdr)); | |
268 | if (unlikely(err)) | |
269 | return err; | |
270 | ||
271 | ip_len = ip_hdrlen(skb); | |
272 | if (unlikely(ip_len < sizeof(struct iphdr) || | |
273 | skb->len < nh_ofs + ip_len)) | |
274 | return -EINVAL; | |
275 | ||
276 | skb_set_transport_header(skb, nh_ofs + ip_len); | |
277 | return 0; | |
278 | } | |
279 | ||
280 | static bool tcphdr_ok(struct sk_buff *skb) | |
281 | { | |
282 | int th_ofs = skb_transport_offset(skb); | |
283 | int tcp_len; | |
284 | ||
285 | if (unlikely(!pskb_may_pull(skb, th_ofs + sizeof(struct tcphdr)))) | |
286 | return false; | |
287 | ||
288 | tcp_len = tcp_hdrlen(skb); | |
289 | if (unlikely(tcp_len < sizeof(struct tcphdr) || | |
290 | skb->len < th_ofs + tcp_len)) | |
291 | return false; | |
292 | ||
293 | return true; | |
294 | } | |
295 | ||
296 | static bool udphdr_ok(struct sk_buff *skb) | |
297 | { | |
298 | return pskb_may_pull(skb, skb_transport_offset(skb) + | |
299 | sizeof(struct udphdr)); | |
300 | } | |
301 | ||
a175a723 JS |
302 | static bool sctphdr_ok(struct sk_buff *skb) |
303 | { | |
304 | return pskb_may_pull(skb, skb_transport_offset(skb) + | |
305 | sizeof(struct sctphdr)); | |
306 | } | |
307 | ||
ccb1352e JG |
308 | static bool icmphdr_ok(struct sk_buff *skb) |
309 | { | |
310 | return pskb_may_pull(skb, skb_transport_offset(skb) + | |
311 | sizeof(struct icmphdr)); | |
312 | } | |
313 | ||
314 | u64 ovs_flow_used_time(unsigned long flow_jiffies) | |
315 | { | |
316 | struct timespec cur_ts; | |
317 | u64 cur_ms, idle_ms; | |
318 | ||
319 | ktime_get_ts(&cur_ts); | |
320 | idle_ms = jiffies_to_msecs(jiffies - flow_jiffies); | |
321 | cur_ms = (u64)cur_ts.tv_sec * MSEC_PER_SEC + | |
322 | cur_ts.tv_nsec / NSEC_PER_MSEC; | |
323 | ||
324 | return cur_ms - idle_ms; | |
325 | } | |
326 | ||
03f0d916 | 327 | static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key) |
ccb1352e JG |
328 | { |
329 | unsigned int nh_ofs = skb_network_offset(skb); | |
330 | unsigned int nh_len; | |
331 | int payload_ofs; | |
332 | struct ipv6hdr *nh; | |
333 | uint8_t nexthdr; | |
334 | __be16 frag_off; | |
335 | int err; | |
336 | ||
ccb1352e JG |
337 | err = check_header(skb, nh_ofs + sizeof(*nh)); |
338 | if (unlikely(err)) | |
339 | return err; | |
340 | ||
341 | nh = ipv6_hdr(skb); | |
342 | nexthdr = nh->nexthdr; | |
343 | payload_ofs = (u8 *)(nh + 1) - skb->data; | |
344 | ||
345 | key->ip.proto = NEXTHDR_NONE; | |
346 | key->ip.tos = ipv6_get_dsfield(nh); | |
347 | key->ip.ttl = nh->hop_limit; | |
348 | key->ipv6.label = *(__be32 *)nh & htonl(IPV6_FLOWINFO_FLOWLABEL); | |
349 | key->ipv6.addr.src = nh->saddr; | |
350 | key->ipv6.addr.dst = nh->daddr; | |
351 | ||
352 | payload_ofs = ipv6_skip_exthdr(skb, payload_ofs, &nexthdr, &frag_off); | |
353 | if (unlikely(payload_ofs < 0)) | |
354 | return -EINVAL; | |
355 | ||
356 | if (frag_off) { | |
357 | if (frag_off & htons(~0x7)) | |
358 | key->ip.frag = OVS_FRAG_TYPE_LATER; | |
359 | else | |
360 | key->ip.frag = OVS_FRAG_TYPE_FIRST; | |
361 | } | |
362 | ||
363 | nh_len = payload_ofs - nh_ofs; | |
364 | skb_set_transport_header(skb, nh_ofs + nh_len); | |
365 | key->ip.proto = nexthdr; | |
366 | return nh_len; | |
367 | } | |
368 | ||
369 | static bool icmp6hdr_ok(struct sk_buff *skb) | |
370 | { | |
371 | return pskb_may_pull(skb, skb_transport_offset(skb) + | |
372 | sizeof(struct icmp6hdr)); | |
373 | } | |
374 | ||
03f0d916 AZ |
375 | void ovs_flow_key_mask(struct sw_flow_key *dst, const struct sw_flow_key *src, |
376 | const struct sw_flow_mask *mask) | |
377 | { | |
5828cd9a AZ |
378 | const long *m = (long *)((u8 *)&mask->key + mask->range.start); |
379 | const long *s = (long *)((u8 *)src + mask->range.start); | |
380 | long *d = (long *)((u8 *)dst + mask->range.start); | |
03f0d916 AZ |
381 | int i; |
382 | ||
5828cd9a AZ |
383 | /* The memory outside of the 'mask->range' are not set since |
384 | * further operations on 'dst' only uses contents within | |
385 | * 'mask->range'. | |
386 | */ | |
387 | for (i = 0; i < range_n_bytes(&mask->range); i += sizeof(long)) | |
388 | *d++ = *s++ & *m++; | |
03f0d916 AZ |
389 | } |
390 | ||
ccb1352e JG |
391 | #define TCP_FLAGS_OFFSET 13 |
392 | #define TCP_FLAG_MASK 0x3f | |
393 | ||
394 | void ovs_flow_used(struct sw_flow *flow, struct sk_buff *skb) | |
395 | { | |
396 | u8 tcp_flags = 0; | |
397 | ||
c55177e3 JG |
398 | if ((flow->key.eth.type == htons(ETH_P_IP) || |
399 | flow->key.eth.type == htons(ETH_P_IPV6)) && | |
bf32fecd JG |
400 | flow->key.ip.proto == IPPROTO_TCP && |
401 | likely(skb->len >= skb_transport_offset(skb) + sizeof(struct tcphdr))) { | |
ccb1352e JG |
402 | u8 *tcp = (u8 *)tcp_hdr(skb); |
403 | tcp_flags = *(tcp + TCP_FLAGS_OFFSET) & TCP_FLAG_MASK; | |
404 | } | |
405 | ||
406 | spin_lock(&flow->lock); | |
407 | flow->used = jiffies; | |
408 | flow->packet_count++; | |
409 | flow->byte_count += skb->len; | |
410 | flow->tcp_flags |= tcp_flags; | |
411 | spin_unlock(&flow->lock); | |
412 | } | |
413 | ||
74f84a57 | 414 | struct sw_flow_actions *ovs_flow_actions_alloc(int size) |
ccb1352e | 415 | { |
ccb1352e JG |
416 | struct sw_flow_actions *sfa; |
417 | ||
74f84a57 | 418 | if (size > MAX_ACTIONS_BUFSIZE) |
ccb1352e JG |
419 | return ERR_PTR(-EINVAL); |
420 | ||
74f84a57 | 421 | sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL); |
ccb1352e JG |
422 | if (!sfa) |
423 | return ERR_PTR(-ENOMEM); | |
424 | ||
74f84a57 | 425 | sfa->actions_len = 0; |
ccb1352e JG |
426 | return sfa; |
427 | } | |
428 | ||
429 | struct sw_flow *ovs_flow_alloc(void) | |
430 | { | |
431 | struct sw_flow *flow; | |
432 | ||
433 | flow = kmem_cache_alloc(flow_cache, GFP_KERNEL); | |
434 | if (!flow) | |
435 | return ERR_PTR(-ENOMEM); | |
436 | ||
437 | spin_lock_init(&flow->lock); | |
438 | flow->sf_acts = NULL; | |
03f0d916 | 439 | flow->mask = NULL; |
ccb1352e JG |
440 | |
441 | return flow; | |
442 | } | |
443 | ||
444 | static struct hlist_head *find_bucket(struct flow_table *table, u32 hash) | |
445 | { | |
446 | hash = jhash_1word(hash, table->hash_seed); | |
447 | return flex_array_get(table->buckets, | |
448 | (hash & (table->n_buckets - 1))); | |
449 | } | |
450 | ||
451 | static struct flex_array *alloc_buckets(unsigned int n_buckets) | |
452 | { | |
453 | struct flex_array *buckets; | |
454 | int i, err; | |
455 | ||
42415c90 | 456 | buckets = flex_array_alloc(sizeof(struct hlist_head), |
ccb1352e JG |
457 | n_buckets, GFP_KERNEL); |
458 | if (!buckets) | |
459 | return NULL; | |
460 | ||
461 | err = flex_array_prealloc(buckets, 0, n_buckets, GFP_KERNEL); | |
462 | if (err) { | |
463 | flex_array_free(buckets); | |
464 | return NULL; | |
465 | } | |
466 | ||
467 | for (i = 0; i < n_buckets; i++) | |
468 | INIT_HLIST_HEAD((struct hlist_head *) | |
469 | flex_array_get(buckets, i)); | |
470 | ||
471 | return buckets; | |
472 | } | |
473 | ||
474 | static void free_buckets(struct flex_array *buckets) | |
475 | { | |
476 | flex_array_free(buckets); | |
477 | } | |
478 | ||
03f0d916 | 479 | static struct flow_table *__flow_tbl_alloc(int new_size) |
ccb1352e JG |
480 | { |
481 | struct flow_table *table = kmalloc(sizeof(*table), GFP_KERNEL); | |
482 | ||
483 | if (!table) | |
484 | return NULL; | |
485 | ||
486 | table->buckets = alloc_buckets(new_size); | |
487 | ||
488 | if (!table->buckets) { | |
489 | kfree(table); | |
490 | return NULL; | |
491 | } | |
492 | table->n_buckets = new_size; | |
493 | table->count = 0; | |
494 | table->node_ver = 0; | |
495 | table->keep_flows = false; | |
496 | get_random_bytes(&table->hash_seed, sizeof(u32)); | |
03f0d916 | 497 | table->mask_list = NULL; |
ccb1352e JG |
498 | |
499 | return table; | |
500 | } | |
501 | ||
03f0d916 | 502 | static void __flow_tbl_destroy(struct flow_table *table) |
ccb1352e JG |
503 | { |
504 | int i; | |
505 | ||
ccb1352e JG |
506 | if (table->keep_flows) |
507 | goto skip_flows; | |
508 | ||
509 | for (i = 0; i < table->n_buckets; i++) { | |
510 | struct sw_flow *flow; | |
511 | struct hlist_head *head = flex_array_get(table->buckets, i); | |
b67bfe0d | 512 | struct hlist_node *n; |
ccb1352e JG |
513 | int ver = table->node_ver; |
514 | ||
b67bfe0d | 515 | hlist_for_each_entry_safe(flow, n, head, hash_node[ver]) { |
76a66c7e | 516 | hlist_del(&flow->hash_node[ver]); |
03f0d916 | 517 | ovs_flow_free(flow, false); |
ccb1352e JG |
518 | } |
519 | } | |
520 | ||
03f0d916 AZ |
521 | BUG_ON(!list_empty(table->mask_list)); |
522 | kfree(table->mask_list); | |
523 | ||
ccb1352e JG |
524 | skip_flows: |
525 | free_buckets(table->buckets); | |
526 | kfree(table); | |
527 | } | |
528 | ||
03f0d916 AZ |
529 | struct flow_table *ovs_flow_tbl_alloc(int new_size) |
530 | { | |
531 | struct flow_table *table = __flow_tbl_alloc(new_size); | |
532 | ||
533 | if (!table) | |
534 | return NULL; | |
535 | ||
536 | table->mask_list = kmalloc(sizeof(struct list_head), GFP_KERNEL); | |
537 | if (!table->mask_list) { | |
538 | table->keep_flows = true; | |
539 | __flow_tbl_destroy(table); | |
540 | return NULL; | |
541 | } | |
542 | INIT_LIST_HEAD(table->mask_list); | |
543 | ||
544 | return table; | |
545 | } | |
546 | ||
ccb1352e JG |
547 | static void flow_tbl_destroy_rcu_cb(struct rcu_head *rcu) |
548 | { | |
549 | struct flow_table *table = container_of(rcu, struct flow_table, rcu); | |
550 | ||
03f0d916 | 551 | __flow_tbl_destroy(table); |
ccb1352e JG |
552 | } |
553 | ||
03f0d916 | 554 | void ovs_flow_tbl_destroy(struct flow_table *table, bool deferred) |
ccb1352e JG |
555 | { |
556 | if (!table) | |
557 | return; | |
558 | ||
03f0d916 AZ |
559 | if (deferred) |
560 | call_rcu(&table->rcu, flow_tbl_destroy_rcu_cb); | |
561 | else | |
562 | __flow_tbl_destroy(table); | |
ccb1352e JG |
563 | } |
564 | ||
03f0d916 | 565 | struct sw_flow *ovs_flow_dump_next(struct flow_table *table, u32 *bucket, u32 *last) |
ccb1352e JG |
566 | { |
567 | struct sw_flow *flow; | |
568 | struct hlist_head *head; | |
ccb1352e JG |
569 | int ver; |
570 | int i; | |
571 | ||
572 | ver = table->node_ver; | |
573 | while (*bucket < table->n_buckets) { | |
574 | i = 0; | |
575 | head = flex_array_get(table->buckets, *bucket); | |
b67bfe0d | 576 | hlist_for_each_entry_rcu(flow, head, hash_node[ver]) { |
ccb1352e JG |
577 | if (i < *last) { |
578 | i++; | |
579 | continue; | |
580 | } | |
581 | *last = i + 1; | |
582 | return flow; | |
583 | } | |
584 | (*bucket)++; | |
585 | *last = 0; | |
586 | } | |
587 | ||
588 | return NULL; | |
589 | } | |
590 | ||
03f0d916 | 591 | static void __tbl_insert(struct flow_table *table, struct sw_flow *flow) |
a3e82996 PS |
592 | { |
593 | struct hlist_head *head; | |
03f0d916 | 594 | |
a3e82996 PS |
595 | head = find_bucket(table, flow->hash); |
596 | hlist_add_head_rcu(&flow->hash_node[table->node_ver], head); | |
03f0d916 | 597 | |
a3e82996 PS |
598 | table->count++; |
599 | } | |
600 | ||
ccb1352e JG |
601 | static void flow_table_copy_flows(struct flow_table *old, struct flow_table *new) |
602 | { | |
603 | int old_ver; | |
604 | int i; | |
605 | ||
606 | old_ver = old->node_ver; | |
607 | new->node_ver = !old_ver; | |
608 | ||
609 | /* Insert in new table. */ | |
610 | for (i = 0; i < old->n_buckets; i++) { | |
611 | struct sw_flow *flow; | |
612 | struct hlist_head *head; | |
ccb1352e JG |
613 | |
614 | head = flex_array_get(old->buckets, i); | |
615 | ||
b67bfe0d | 616 | hlist_for_each_entry(flow, head, hash_node[old_ver]) |
03f0d916 | 617 | __tbl_insert(new, flow); |
ccb1352e | 618 | } |
03f0d916 AZ |
619 | |
620 | new->mask_list = old->mask_list; | |
ccb1352e JG |
621 | old->keep_flows = true; |
622 | } | |
623 | ||
624 | static struct flow_table *__flow_tbl_rehash(struct flow_table *table, int n_buckets) | |
625 | { | |
626 | struct flow_table *new_table; | |
627 | ||
03f0d916 | 628 | new_table = __flow_tbl_alloc(n_buckets); |
ccb1352e JG |
629 | if (!new_table) |
630 | return ERR_PTR(-ENOMEM); | |
631 | ||
632 | flow_table_copy_flows(table, new_table); | |
633 | ||
634 | return new_table; | |
635 | } | |
636 | ||
637 | struct flow_table *ovs_flow_tbl_rehash(struct flow_table *table) | |
638 | { | |
639 | return __flow_tbl_rehash(table, table->n_buckets); | |
640 | } | |
641 | ||
642 | struct flow_table *ovs_flow_tbl_expand(struct flow_table *table) | |
643 | { | |
644 | return __flow_tbl_rehash(table, table->n_buckets * 2); | |
645 | } | |
646 | ||
03f0d916 | 647 | static void __flow_free(struct sw_flow *flow) |
ccb1352e | 648 | { |
ccb1352e JG |
649 | kfree((struct sf_flow_acts __force *)flow->sf_acts); |
650 | kmem_cache_free(flow_cache, flow); | |
651 | } | |
652 | ||
ccb1352e JG |
653 | static void rcu_free_flow_callback(struct rcu_head *rcu) |
654 | { | |
655 | struct sw_flow *flow = container_of(rcu, struct sw_flow, rcu); | |
656 | ||
03f0d916 | 657 | __flow_free(flow); |
ccb1352e JG |
658 | } |
659 | ||
03f0d916 | 660 | void ovs_flow_free(struct sw_flow *flow, bool deferred) |
ccb1352e | 661 | { |
03f0d916 AZ |
662 | if (!flow) |
663 | return; | |
664 | ||
665 | ovs_sw_flow_mask_del_ref(flow->mask, deferred); | |
666 | ||
667 | if (deferred) | |
668 | call_rcu(&flow->rcu, rcu_free_flow_callback); | |
669 | else | |
670 | __flow_free(flow); | |
ccb1352e JG |
671 | } |
672 | ||
ccb1352e JG |
673 | /* Schedules 'sf_acts' to be freed after the next RCU grace period. |
674 | * The caller must hold rcu_read_lock for this to be sensible. */ | |
675 | void ovs_flow_deferred_free_acts(struct sw_flow_actions *sf_acts) | |
676 | { | |
80f0fd8a | 677 | kfree_rcu(sf_acts, rcu); |
ccb1352e JG |
678 | } |
679 | ||
680 | static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key) | |
681 | { | |
682 | struct qtag_prefix { | |
683 | __be16 eth_type; /* ETH_P_8021Q */ | |
684 | __be16 tci; | |
685 | }; | |
686 | struct qtag_prefix *qp; | |
687 | ||
688 | if (unlikely(skb->len < sizeof(struct qtag_prefix) + sizeof(__be16))) | |
689 | return 0; | |
690 | ||
691 | if (unlikely(!pskb_may_pull(skb, sizeof(struct qtag_prefix) + | |
692 | sizeof(__be16)))) | |
693 | return -ENOMEM; | |
694 | ||
695 | qp = (struct qtag_prefix *) skb->data; | |
696 | key->eth.tci = qp->tci | htons(VLAN_TAG_PRESENT); | |
697 | __skb_pull(skb, sizeof(struct qtag_prefix)); | |
698 | ||
699 | return 0; | |
700 | } | |
701 | ||
702 | static __be16 parse_ethertype(struct sk_buff *skb) | |
703 | { | |
704 | struct llc_snap_hdr { | |
705 | u8 dsap; /* Always 0xAA */ | |
706 | u8 ssap; /* Always 0xAA */ | |
707 | u8 ctrl; | |
708 | u8 oui[3]; | |
709 | __be16 ethertype; | |
710 | }; | |
711 | struct llc_snap_hdr *llc; | |
712 | __be16 proto; | |
713 | ||
714 | proto = *(__be16 *) skb->data; | |
715 | __skb_pull(skb, sizeof(__be16)); | |
716 | ||
e5c5d22e | 717 | if (ntohs(proto) >= ETH_P_802_3_MIN) |
ccb1352e JG |
718 | return proto; |
719 | ||
720 | if (skb->len < sizeof(struct llc_snap_hdr)) | |
721 | return htons(ETH_P_802_2); | |
722 | ||
723 | if (unlikely(!pskb_may_pull(skb, sizeof(struct llc_snap_hdr)))) | |
724 | return htons(0); | |
725 | ||
726 | llc = (struct llc_snap_hdr *) skb->data; | |
727 | if (llc->dsap != LLC_SAP_SNAP || | |
728 | llc->ssap != LLC_SAP_SNAP || | |
729 | (llc->oui[0] | llc->oui[1] | llc->oui[2]) != 0) | |
730 | return htons(ETH_P_802_2); | |
731 | ||
732 | __skb_pull(skb, sizeof(struct llc_snap_hdr)); | |
17b682a0 | 733 | |
e5c5d22e | 734 | if (ntohs(llc->ethertype) >= ETH_P_802_3_MIN) |
17b682a0 RL |
735 | return llc->ethertype; |
736 | ||
737 | return htons(ETH_P_802_2); | |
ccb1352e JG |
738 | } |
739 | ||
740 | static int parse_icmpv6(struct sk_buff *skb, struct sw_flow_key *key, | |
03f0d916 | 741 | int nh_len) |
ccb1352e JG |
742 | { |
743 | struct icmp6hdr *icmp = icmp6_hdr(skb); | |
ccb1352e JG |
744 | |
745 | /* The ICMPv6 type and code fields use the 16-bit transport port | |
746 | * fields, so we need to store them in 16-bit network byte order. | |
747 | */ | |
748 | key->ipv6.tp.src = htons(icmp->icmp6_type); | |
749 | key->ipv6.tp.dst = htons(icmp->icmp6_code); | |
ccb1352e JG |
750 | |
751 | if (icmp->icmp6_code == 0 && | |
752 | (icmp->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION || | |
753 | icmp->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT)) { | |
754 | int icmp_len = skb->len - skb_transport_offset(skb); | |
755 | struct nd_msg *nd; | |
756 | int offset; | |
757 | ||
ccb1352e JG |
758 | /* In order to process neighbor discovery options, we need the |
759 | * entire packet. | |
760 | */ | |
761 | if (unlikely(icmp_len < sizeof(*nd))) | |
03f0d916 AZ |
762 | return 0; |
763 | ||
764 | if (unlikely(skb_linearize(skb))) | |
765 | return -ENOMEM; | |
ccb1352e JG |
766 | |
767 | nd = (struct nd_msg *)skb_transport_header(skb); | |
768 | key->ipv6.nd.target = nd->target; | |
ccb1352e JG |
769 | |
770 | icmp_len -= sizeof(*nd); | |
771 | offset = 0; | |
772 | while (icmp_len >= 8) { | |
773 | struct nd_opt_hdr *nd_opt = | |
774 | (struct nd_opt_hdr *)(nd->opt + offset); | |
775 | int opt_len = nd_opt->nd_opt_len * 8; | |
776 | ||
777 | if (unlikely(!opt_len || opt_len > icmp_len)) | |
03f0d916 | 778 | return 0; |
ccb1352e JG |
779 | |
780 | /* Store the link layer address if the appropriate | |
781 | * option is provided. It is considered an error if | |
782 | * the same link layer option is specified twice. | |
783 | */ | |
784 | if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LL_ADDR | |
785 | && opt_len == 8) { | |
786 | if (unlikely(!is_zero_ether_addr(key->ipv6.nd.sll))) | |
787 | goto invalid; | |
788 | memcpy(key->ipv6.nd.sll, | |
789 | &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN); | |
790 | } else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LL_ADDR | |
791 | && opt_len == 8) { | |
792 | if (unlikely(!is_zero_ether_addr(key->ipv6.nd.tll))) | |
793 | goto invalid; | |
794 | memcpy(key->ipv6.nd.tll, | |
795 | &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN); | |
796 | } | |
797 | ||
798 | icmp_len -= opt_len; | |
799 | offset += opt_len; | |
800 | } | |
801 | } | |
802 | ||
03f0d916 | 803 | return 0; |
ccb1352e JG |
804 | |
805 | invalid: | |
806 | memset(&key->ipv6.nd.target, 0, sizeof(key->ipv6.nd.target)); | |
807 | memset(key->ipv6.nd.sll, 0, sizeof(key->ipv6.nd.sll)); | |
808 | memset(key->ipv6.nd.tll, 0, sizeof(key->ipv6.nd.tll)); | |
809 | ||
03f0d916 | 810 | return 0; |
ccb1352e JG |
811 | } |
812 | ||
813 | /** | |
814 | * ovs_flow_extract - extracts a flow key from an Ethernet frame. | |
815 | * @skb: sk_buff that contains the frame, with skb->data pointing to the | |
816 | * Ethernet header | |
817 | * @in_port: port number on which @skb was received. | |
818 | * @key: output flow key | |
ccb1352e JG |
819 | * |
820 | * The caller must ensure that skb->len >= ETH_HLEN. | |
821 | * | |
822 | * Returns 0 if successful, otherwise a negative errno value. | |
823 | * | |
824 | * Initializes @skb header pointers as follows: | |
825 | * | |
826 | * - skb->mac_header: the Ethernet header. | |
827 | * | |
828 | * - skb->network_header: just past the Ethernet header, or just past the | |
829 | * VLAN header, to the first byte of the Ethernet payload. | |
830 | * | |
34d94f21 | 831 | * - skb->transport_header: If key->eth.type is ETH_P_IP or ETH_P_IPV6 |
ccb1352e JG |
832 | * on output, then just past the IP header, if one is present and |
833 | * of a correct length, otherwise the same as skb->network_header. | |
34d94f21 | 834 | * For other key->eth.type values it is left untouched. |
ccb1352e | 835 | */ |
03f0d916 | 836 | int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key) |
ccb1352e | 837 | { |
03f0d916 | 838 | int error; |
ccb1352e JG |
839 | struct ethhdr *eth; |
840 | ||
841 | memset(key, 0, sizeof(*key)); | |
842 | ||
843 | key->phy.priority = skb->priority; | |
7d5437c7 PS |
844 | if (OVS_CB(skb)->tun_key) |
845 | memcpy(&key->tun_key, OVS_CB(skb)->tun_key, sizeof(key->tun_key)); | |
ccb1352e | 846 | key->phy.in_port = in_port; |
39c7caeb | 847 | key->phy.skb_mark = skb->mark; |
ccb1352e JG |
848 | |
849 | skb_reset_mac_header(skb); | |
850 | ||
851 | /* Link layer. We are guaranteed to have at least the 14 byte Ethernet | |
852 | * header in the linear data area. | |
853 | */ | |
854 | eth = eth_hdr(skb); | |
855 | memcpy(key->eth.src, eth->h_source, ETH_ALEN); | |
856 | memcpy(key->eth.dst, eth->h_dest, ETH_ALEN); | |
857 | ||
858 | __skb_pull(skb, 2 * ETH_ALEN); | |
b34df5e8 PS |
859 | /* We are going to push all headers that we pull, so no need to |
860 | * update skb->csum here. | |
861 | */ | |
ccb1352e JG |
862 | |
863 | if (vlan_tx_tag_present(skb)) | |
864 | key->eth.tci = htons(skb->vlan_tci); | |
865 | else if (eth->h_proto == htons(ETH_P_8021Q)) | |
866 | if (unlikely(parse_vlan(skb, key))) | |
867 | return -ENOMEM; | |
868 | ||
869 | key->eth.type = parse_ethertype(skb); | |
870 | if (unlikely(key->eth.type == htons(0))) | |
871 | return -ENOMEM; | |
872 | ||
873 | skb_reset_network_header(skb); | |
874 | __skb_push(skb, skb->data - skb_mac_header(skb)); | |
875 | ||
876 | /* Network layer. */ | |
877 | if (key->eth.type == htons(ETH_P_IP)) { | |
878 | struct iphdr *nh; | |
879 | __be16 offset; | |
880 | ||
ccb1352e JG |
881 | error = check_iphdr(skb); |
882 | if (unlikely(error)) { | |
883 | if (error == -EINVAL) { | |
884 | skb->transport_header = skb->network_header; | |
885 | error = 0; | |
886 | } | |
03f0d916 | 887 | return error; |
ccb1352e JG |
888 | } |
889 | ||
890 | nh = ip_hdr(skb); | |
891 | key->ipv4.addr.src = nh->saddr; | |
892 | key->ipv4.addr.dst = nh->daddr; | |
893 | ||
894 | key->ip.proto = nh->protocol; | |
895 | key->ip.tos = nh->tos; | |
896 | key->ip.ttl = nh->ttl; | |
897 | ||
898 | offset = nh->frag_off & htons(IP_OFFSET); | |
899 | if (offset) { | |
900 | key->ip.frag = OVS_FRAG_TYPE_LATER; | |
03f0d916 | 901 | return 0; |
ccb1352e JG |
902 | } |
903 | if (nh->frag_off & htons(IP_MF) || | |
904 | skb_shinfo(skb)->gso_type & SKB_GSO_UDP) | |
905 | key->ip.frag = OVS_FRAG_TYPE_FIRST; | |
906 | ||
907 | /* Transport layer. */ | |
908 | if (key->ip.proto == IPPROTO_TCP) { | |
ccb1352e JG |
909 | if (tcphdr_ok(skb)) { |
910 | struct tcphdr *tcp = tcp_hdr(skb); | |
911 | key->ipv4.tp.src = tcp->source; | |
912 | key->ipv4.tp.dst = tcp->dest; | |
913 | } | |
914 | } else if (key->ip.proto == IPPROTO_UDP) { | |
ccb1352e JG |
915 | if (udphdr_ok(skb)) { |
916 | struct udphdr *udp = udp_hdr(skb); | |
917 | key->ipv4.tp.src = udp->source; | |
918 | key->ipv4.tp.dst = udp->dest; | |
919 | } | |
a175a723 JS |
920 | } else if (key->ip.proto == IPPROTO_SCTP) { |
921 | if (sctphdr_ok(skb)) { | |
922 | struct sctphdr *sctp = sctp_hdr(skb); | |
923 | key->ipv4.tp.src = sctp->source; | |
924 | key->ipv4.tp.dst = sctp->dest; | |
925 | } | |
ccb1352e | 926 | } else if (key->ip.proto == IPPROTO_ICMP) { |
ccb1352e JG |
927 | if (icmphdr_ok(skb)) { |
928 | struct icmphdr *icmp = icmp_hdr(skb); | |
929 | /* The ICMP type and code fields use the 16-bit | |
930 | * transport port fields, so we need to store | |
931 | * them in 16-bit network byte order. */ | |
932 | key->ipv4.tp.src = htons(icmp->type); | |
933 | key->ipv4.tp.dst = htons(icmp->code); | |
934 | } | |
935 | } | |
936 | ||
c0618533 MM |
937 | } else if ((key->eth.type == htons(ETH_P_ARP) || |
938 | key->eth.type == htons(ETH_P_RARP)) && arphdr_ok(skb)) { | |
ccb1352e JG |
939 | struct arp_eth_header *arp; |
940 | ||
941 | arp = (struct arp_eth_header *)skb_network_header(skb); | |
942 | ||
943 | if (arp->ar_hrd == htons(ARPHRD_ETHER) | |
944 | && arp->ar_pro == htons(ETH_P_IP) | |
945 | && arp->ar_hln == ETH_ALEN | |
946 | && arp->ar_pln == 4) { | |
947 | ||
948 | /* We only match on the lower 8 bits of the opcode. */ | |
949 | if (ntohs(arp->ar_op) <= 0xff) | |
950 | key->ip.proto = ntohs(arp->ar_op); | |
d04d3829 MM |
951 | memcpy(&key->ipv4.addr.src, arp->ar_sip, sizeof(key->ipv4.addr.src)); |
952 | memcpy(&key->ipv4.addr.dst, arp->ar_tip, sizeof(key->ipv4.addr.dst)); | |
953 | memcpy(key->ipv4.arp.sha, arp->ar_sha, ETH_ALEN); | |
954 | memcpy(key->ipv4.arp.tha, arp->ar_tha, ETH_ALEN); | |
ccb1352e JG |
955 | } |
956 | } else if (key->eth.type == htons(ETH_P_IPV6)) { | |
957 | int nh_len; /* IPv6 Header + Extensions */ | |
958 | ||
03f0d916 | 959 | nh_len = parse_ipv6hdr(skb, key); |
ccb1352e | 960 | if (unlikely(nh_len < 0)) { |
03f0d916 | 961 | if (nh_len == -EINVAL) { |
ccb1352e | 962 | skb->transport_header = skb->network_header; |
03f0d916 AZ |
963 | error = 0; |
964 | } else { | |
ccb1352e | 965 | error = nh_len; |
03f0d916 AZ |
966 | } |
967 | return error; | |
ccb1352e JG |
968 | } |
969 | ||
970 | if (key->ip.frag == OVS_FRAG_TYPE_LATER) | |
03f0d916 | 971 | return 0; |
ccb1352e JG |
972 | if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP) |
973 | key->ip.frag = OVS_FRAG_TYPE_FIRST; | |
974 | ||
975 | /* Transport layer. */ | |
976 | if (key->ip.proto == NEXTHDR_TCP) { | |
ccb1352e JG |
977 | if (tcphdr_ok(skb)) { |
978 | struct tcphdr *tcp = tcp_hdr(skb); | |
979 | key->ipv6.tp.src = tcp->source; | |
980 | key->ipv6.tp.dst = tcp->dest; | |
981 | } | |
982 | } else if (key->ip.proto == NEXTHDR_UDP) { | |
ccb1352e JG |
983 | if (udphdr_ok(skb)) { |
984 | struct udphdr *udp = udp_hdr(skb); | |
985 | key->ipv6.tp.src = udp->source; | |
986 | key->ipv6.tp.dst = udp->dest; | |
987 | } | |
a175a723 JS |
988 | } else if (key->ip.proto == NEXTHDR_SCTP) { |
989 | if (sctphdr_ok(skb)) { | |
990 | struct sctphdr *sctp = sctp_hdr(skb); | |
991 | key->ipv6.tp.src = sctp->source; | |
992 | key->ipv6.tp.dst = sctp->dest; | |
993 | } | |
ccb1352e | 994 | } else if (key->ip.proto == NEXTHDR_ICMP) { |
ccb1352e | 995 | if (icmp6hdr_ok(skb)) { |
03f0d916 AZ |
996 | error = parse_icmpv6(skb, key, nh_len); |
997 | if (error) | |
998 | return error; | |
ccb1352e JG |
999 | } |
1000 | } | |
1001 | } | |
1002 | ||
03f0d916 | 1003 | return 0; |
ccb1352e JG |
1004 | } |
1005 | ||
02237373 AZ |
1006 | static u32 ovs_flow_hash(const struct sw_flow_key *key, int key_start, |
1007 | int key_end) | |
a3e82996 | 1008 | { |
5828cd9a AZ |
1009 | u32 *hash_key = (u32 *)((u8 *)key + key_start); |
1010 | int hash_u32s = (key_end - key_start) >> 2; | |
1011 | ||
1012 | /* Make sure number of hash bytes are multiple of u32. */ | |
1013 | BUILD_BUG_ON(sizeof(long) % sizeof(u32)); | |
1014 | ||
1015 | return jhash2(hash_key, hash_u32s, 0); | |
a3e82996 PS |
1016 | } |
1017 | ||
03f0d916 | 1018 | static int flow_key_start(const struct sw_flow_key *key) |
ccb1352e | 1019 | { |
a3e82996 PS |
1020 | if (key->tun_key.ipv4_dst) |
1021 | return 0; | |
1022 | else | |
5828cd9a AZ |
1023 | return rounddown(offsetof(struct sw_flow_key, phy), |
1024 | sizeof(long)); | |
ccb1352e JG |
1025 | } |
1026 | ||
03f0d916 | 1027 | static bool __cmp_key(const struct sw_flow_key *key1, |
02237373 | 1028 | const struct sw_flow_key *key2, int key_start, int key_end) |
03f0d916 | 1029 | { |
5828cd9a AZ |
1030 | const long *cp1 = (long *)((u8 *)key1 + key_start); |
1031 | const long *cp2 = (long *)((u8 *)key2 + key_start); | |
1032 | long diffs = 0; | |
1033 | int i; | |
1034 | ||
1035 | for (i = key_start; i < key_end; i += sizeof(long)) | |
1036 | diffs |= *cp1++ ^ *cp2++; | |
1037 | ||
1038 | return diffs == 0; | |
03f0d916 AZ |
1039 | } |
1040 | ||
5828cd9a | 1041 | static bool __flow_cmp_masked_key(const struct sw_flow *flow, |
02237373 | 1042 | const struct sw_flow_key *key, int key_start, int key_end) |
03f0d916 | 1043 | { |
02237373 | 1044 | return __cmp_key(&flow->key, key, key_start, key_end); |
03f0d916 AZ |
1045 | } |
1046 | ||
1047 | static bool __flow_cmp_unmasked_key(const struct sw_flow *flow, | |
02237373 | 1048 | const struct sw_flow_key *key, int key_start, int key_end) |
03f0d916 | 1049 | { |
02237373 | 1050 | return __cmp_key(&flow->unmasked_key, key, key_start, key_end); |
03f0d916 AZ |
1051 | } |
1052 | ||
1053 | bool ovs_flow_cmp_unmasked_key(const struct sw_flow *flow, | |
02237373 | 1054 | const struct sw_flow_key *key, int key_end) |
03f0d916 AZ |
1055 | { |
1056 | int key_start; | |
1057 | key_start = flow_key_start(key); | |
1058 | ||
02237373 | 1059 | return __flow_cmp_unmasked_key(flow, key, key_start, key_end); |
03f0d916 AZ |
1060 | |
1061 | } | |
1062 | ||
1063 | struct sw_flow *ovs_flow_lookup_unmasked_key(struct flow_table *table, | |
1064 | struct sw_flow_match *match) | |
1065 | { | |
1066 | struct sw_flow_key *unmasked = match->key; | |
02237373 | 1067 | int key_end = match->range.end; |
03f0d916 AZ |
1068 | struct sw_flow *flow; |
1069 | ||
1070 | flow = ovs_flow_lookup(table, unmasked); | |
02237373 | 1071 | if (flow && (!ovs_flow_cmp_unmasked_key(flow, unmasked, key_end))) |
03f0d916 AZ |
1072 | flow = NULL; |
1073 | ||
1074 | return flow; | |
1075 | } | |
1076 | ||
1077 | static struct sw_flow *ovs_masked_flow_lookup(struct flow_table *table, | |
5828cd9a | 1078 | const struct sw_flow_key *unmasked, |
03f0d916 | 1079 | struct sw_flow_mask *mask) |
ccb1352e JG |
1080 | { |
1081 | struct sw_flow *flow; | |
ccb1352e | 1082 | struct hlist_head *head; |
03f0d916 | 1083 | int key_start = mask->range.start; |
02237373 | 1084 | int key_end = mask->range.end; |
ccb1352e | 1085 | u32 hash; |
03f0d916 | 1086 | struct sw_flow_key masked_key; |
ccb1352e | 1087 | |
5828cd9a | 1088 | ovs_flow_key_mask(&masked_key, unmasked, mask); |
02237373 | 1089 | hash = ovs_flow_hash(&masked_key, key_start, key_end); |
ccb1352e | 1090 | head = find_bucket(table, hash); |
b67bfe0d | 1091 | hlist_for_each_entry_rcu(flow, head, hash_node[table->node_ver]) { |
03f0d916 | 1092 | if (flow->mask == mask && |
5828cd9a AZ |
1093 | __flow_cmp_masked_key(flow, &masked_key, |
1094 | key_start, key_end)) | |
ccb1352e | 1095 | return flow; |
ccb1352e JG |
1096 | } |
1097 | return NULL; | |
1098 | } | |
1099 | ||
03f0d916 AZ |
1100 | struct sw_flow *ovs_flow_lookup(struct flow_table *tbl, |
1101 | const struct sw_flow_key *key) | |
ccb1352e | 1102 | { |
03f0d916 AZ |
1103 | struct sw_flow *flow = NULL; |
1104 | struct sw_flow_mask *mask; | |
1105 | ||
1106 | list_for_each_entry_rcu(mask, tbl->mask_list, list) { | |
1107 | flow = ovs_masked_flow_lookup(tbl, key, mask); | |
1108 | if (flow) /* Found */ | |
1109 | break; | |
1110 | } | |
1111 | ||
1112 | return flow; | |
ccb1352e JG |
1113 | } |
1114 | ||
03f0d916 AZ |
1115 | |
1116 | void ovs_flow_insert(struct flow_table *table, struct sw_flow *flow) | |
1117 | { | |
1118 | flow->hash = ovs_flow_hash(&flow->key, flow->mask->range.start, | |
1119 | flow->mask->range.end); | |
1120 | __tbl_insert(table, flow); | |
1121 | } | |
1122 | ||
1123 | void ovs_flow_remove(struct flow_table *table, struct sw_flow *flow) | |
ccb1352e | 1124 | { |
d3e1101c | 1125 | BUG_ON(table->count == 0); |
ccb1352e JG |
1126 | hlist_del_rcu(&flow->hash_node[table->node_ver]); |
1127 | table->count--; | |
ccb1352e JG |
1128 | } |
1129 | ||
1130 | /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */ | |
1131 | const int ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = { | |
1132 | [OVS_KEY_ATTR_ENCAP] = -1, | |
1133 | [OVS_KEY_ATTR_PRIORITY] = sizeof(u32), | |
1134 | [OVS_KEY_ATTR_IN_PORT] = sizeof(u32), | |
39c7caeb | 1135 | [OVS_KEY_ATTR_SKB_MARK] = sizeof(u32), |
ccb1352e JG |
1136 | [OVS_KEY_ATTR_ETHERNET] = sizeof(struct ovs_key_ethernet), |
1137 | [OVS_KEY_ATTR_VLAN] = sizeof(__be16), | |
1138 | [OVS_KEY_ATTR_ETHERTYPE] = sizeof(__be16), | |
1139 | [OVS_KEY_ATTR_IPV4] = sizeof(struct ovs_key_ipv4), | |
1140 | [OVS_KEY_ATTR_IPV6] = sizeof(struct ovs_key_ipv6), | |
1141 | [OVS_KEY_ATTR_TCP] = sizeof(struct ovs_key_tcp), | |
1142 | [OVS_KEY_ATTR_UDP] = sizeof(struct ovs_key_udp), | |
a175a723 | 1143 | [OVS_KEY_ATTR_SCTP] = sizeof(struct ovs_key_sctp), |
ccb1352e JG |
1144 | [OVS_KEY_ATTR_ICMP] = sizeof(struct ovs_key_icmp), |
1145 | [OVS_KEY_ATTR_ICMPV6] = sizeof(struct ovs_key_icmpv6), | |
1146 | [OVS_KEY_ATTR_ARP] = sizeof(struct ovs_key_arp), | |
1147 | [OVS_KEY_ATTR_ND] = sizeof(struct ovs_key_nd), | |
7d5437c7 | 1148 | [OVS_KEY_ATTR_TUNNEL] = -1, |
ccb1352e JG |
1149 | }; |
1150 | ||
03f0d916 | 1151 | static bool is_all_zero(const u8 *fp, size_t size) |
ccb1352e | 1152 | { |
03f0d916 | 1153 | int i; |
ccb1352e | 1154 | |
03f0d916 AZ |
1155 | if (!fp) |
1156 | return false; | |
ccb1352e | 1157 | |
03f0d916 AZ |
1158 | for (i = 0; i < size; i++) |
1159 | if (fp[i]) | |
1160 | return false; | |
ccb1352e | 1161 | |
03f0d916 | 1162 | return true; |
ccb1352e JG |
1163 | } |
1164 | ||
03f0d916 AZ |
1165 | static int __parse_flow_nlattrs(const struct nlattr *attr, |
1166 | const struct nlattr *a[], | |
1167 | u64 *attrsp, bool nz) | |
ccb1352e JG |
1168 | { |
1169 | const struct nlattr *nla; | |
1170 | u32 attrs; | |
1171 | int rem; | |
1172 | ||
03f0d916 | 1173 | attrs = *attrsp; |
ccb1352e JG |
1174 | nla_for_each_nested(nla, attr, rem) { |
1175 | u16 type = nla_type(nla); | |
1176 | int expected_len; | |
1177 | ||
03f0d916 AZ |
1178 | if (type > OVS_KEY_ATTR_MAX) { |
1179 | OVS_NLERR("Unknown key attribute (type=%d, max=%d).\n", | |
1180 | type, OVS_KEY_ATTR_MAX); | |
3bf4b5b1 | 1181 | return -EINVAL; |
03f0d916 AZ |
1182 | } |
1183 | ||
1184 | if (attrs & (1 << type)) { | |
1185 | OVS_NLERR("Duplicate key attribute (type %d).\n", type); | |
ccb1352e | 1186 | return -EINVAL; |
03f0d916 | 1187 | } |
ccb1352e JG |
1188 | |
1189 | expected_len = ovs_key_lens[type]; | |
03f0d916 AZ |
1190 | if (nla_len(nla) != expected_len && expected_len != -1) { |
1191 | OVS_NLERR("Key attribute has unexpected length (type=%d" | |
1192 | ", length=%d, expected=%d).\n", type, | |
1193 | nla_len(nla), expected_len); | |
ccb1352e | 1194 | return -EINVAL; |
03f0d916 | 1195 | } |
ccb1352e | 1196 | |
03f0d916 AZ |
1197 | if (!nz || !is_all_zero(nla_data(nla), expected_len)) { |
1198 | attrs |= 1 << type; | |
1199 | a[type] = nla; | |
1200 | } | |
ccb1352e | 1201 | } |
03f0d916 AZ |
1202 | if (rem) { |
1203 | OVS_NLERR("Message has %d unknown bytes.\n", rem); | |
ccb1352e | 1204 | return -EINVAL; |
03f0d916 | 1205 | } |
ccb1352e JG |
1206 | |
1207 | *attrsp = attrs; | |
1208 | return 0; | |
1209 | } | |
1210 | ||
03f0d916 AZ |
1211 | static int parse_flow_mask_nlattrs(const struct nlattr *attr, |
1212 | const struct nlattr *a[], u64 *attrsp) | |
1213 | { | |
1214 | return __parse_flow_nlattrs(attr, a, attrsp, true); | |
1215 | } | |
1216 | ||
1217 | static int parse_flow_nlattrs(const struct nlattr *attr, | |
1218 | const struct nlattr *a[], u64 *attrsp) | |
1219 | { | |
1220 | return __parse_flow_nlattrs(attr, a, attrsp, false); | |
1221 | } | |
1222 | ||
7d5437c7 | 1223 | int ovs_ipv4_tun_from_nlattr(const struct nlattr *attr, |
03f0d916 | 1224 | struct sw_flow_match *match, bool is_mask) |
7d5437c7 PS |
1225 | { |
1226 | struct nlattr *a; | |
1227 | int rem; | |
1228 | bool ttl = false; | |
03f0d916 | 1229 | __be16 tun_flags = 0; |
7d5437c7 PS |
1230 | |
1231 | nla_for_each_nested(a, attr, rem) { | |
1232 | int type = nla_type(a); | |
1233 | static const u32 ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = { | |
1234 | [OVS_TUNNEL_KEY_ATTR_ID] = sizeof(u64), | |
1235 | [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = sizeof(u32), | |
1236 | [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = sizeof(u32), | |
1237 | [OVS_TUNNEL_KEY_ATTR_TOS] = 1, | |
1238 | [OVS_TUNNEL_KEY_ATTR_TTL] = 1, | |
1239 | [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = 0, | |
1240 | [OVS_TUNNEL_KEY_ATTR_CSUM] = 0, | |
1241 | }; | |
1242 | ||
03f0d916 AZ |
1243 | if (type > OVS_TUNNEL_KEY_ATTR_MAX) { |
1244 | OVS_NLERR("Unknown IPv4 tunnel attribute (type=%d, max=%d).\n", | |
1245 | type, OVS_TUNNEL_KEY_ATTR_MAX); | |
7d5437c7 | 1246 | return -EINVAL; |
03f0d916 AZ |
1247 | } |
1248 | ||
1249 | if (ovs_tunnel_key_lens[type] != nla_len(a)) { | |
1250 | OVS_NLERR("IPv4 tunnel attribute type has unexpected " | |
1251 | " length (type=%d, length=%d, expected=%d).\n", | |
1252 | type, nla_len(a), ovs_tunnel_key_lens[type]); | |
1253 | return -EINVAL; | |
1254 | } | |
7d5437c7 PS |
1255 | |
1256 | switch (type) { | |
1257 | case OVS_TUNNEL_KEY_ATTR_ID: | |
03f0d916 AZ |
1258 | SW_FLOW_KEY_PUT(match, tun_key.tun_id, |
1259 | nla_get_be64(a), is_mask); | |
1260 | tun_flags |= TUNNEL_KEY; | |
7d5437c7 PS |
1261 | break; |
1262 | case OVS_TUNNEL_KEY_ATTR_IPV4_SRC: | |
03f0d916 AZ |
1263 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_src, |
1264 | nla_get_be32(a), is_mask); | |
7d5437c7 PS |
1265 | break; |
1266 | case OVS_TUNNEL_KEY_ATTR_IPV4_DST: | |
03f0d916 AZ |
1267 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_dst, |
1268 | nla_get_be32(a), is_mask); | |
7d5437c7 PS |
1269 | break; |
1270 | case OVS_TUNNEL_KEY_ATTR_TOS: | |
03f0d916 AZ |
1271 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_tos, |
1272 | nla_get_u8(a), is_mask); | |
7d5437c7 PS |
1273 | break; |
1274 | case OVS_TUNNEL_KEY_ATTR_TTL: | |
03f0d916 AZ |
1275 | SW_FLOW_KEY_PUT(match, tun_key.ipv4_ttl, |
1276 | nla_get_u8(a), is_mask); | |
7d5437c7 PS |
1277 | ttl = true; |
1278 | break; | |
1279 | case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT: | |
03f0d916 | 1280 | tun_flags |= TUNNEL_DONT_FRAGMENT; |
7d5437c7 PS |
1281 | break; |
1282 | case OVS_TUNNEL_KEY_ATTR_CSUM: | |
03f0d916 | 1283 | tun_flags |= TUNNEL_CSUM; |
7d5437c7 PS |
1284 | break; |
1285 | default: | |
1286 | return -EINVAL; | |
7d5437c7 PS |
1287 | } |
1288 | } | |
7d5437c7 | 1289 | |
03f0d916 | 1290 | SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask); |
7d5437c7 | 1291 | |
03f0d916 AZ |
1292 | if (rem > 0) { |
1293 | OVS_NLERR("IPv4 tunnel attribute has %d unknown bytes.\n", rem); | |
7d5437c7 | 1294 | return -EINVAL; |
03f0d916 AZ |
1295 | } |
1296 | ||
1297 | if (!is_mask) { | |
1298 | if (!match->key->tun_key.ipv4_dst) { | |
1299 | OVS_NLERR("IPv4 tunnel destination address is zero.\n"); | |
1300 | return -EINVAL; | |
1301 | } | |
1302 | ||
1303 | if (!ttl) { | |
1304 | OVS_NLERR("IPv4 tunnel TTL not specified.\n"); | |
1305 | return -EINVAL; | |
1306 | } | |
1307 | } | |
7d5437c7 PS |
1308 | |
1309 | return 0; | |
1310 | } | |
1311 | ||
1312 | int ovs_ipv4_tun_to_nlattr(struct sk_buff *skb, | |
03f0d916 AZ |
1313 | const struct ovs_key_ipv4_tunnel *tun_key, |
1314 | const struct ovs_key_ipv4_tunnel *output) | |
7d5437c7 PS |
1315 | { |
1316 | struct nlattr *nla; | |
1317 | ||
1318 | nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL); | |
1319 | if (!nla) | |
1320 | return -EMSGSIZE; | |
1321 | ||
03f0d916 AZ |
1322 | if (output->tun_flags & TUNNEL_KEY && |
1323 | nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id)) | |
7d5437c7 | 1324 | return -EMSGSIZE; |
03f0d916 AZ |
1325 | if (output->ipv4_src && |
1326 | nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, output->ipv4_src)) | |
7d5437c7 | 1327 | return -EMSGSIZE; |
03f0d916 AZ |
1328 | if (output->ipv4_dst && |
1329 | nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST, output->ipv4_dst)) | |
7d5437c7 | 1330 | return -EMSGSIZE; |
03f0d916 AZ |
1331 | if (output->ipv4_tos && |
1332 | nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->ipv4_tos)) | |
7d5437c7 | 1333 | return -EMSGSIZE; |
03f0d916 | 1334 | if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ipv4_ttl)) |
7d5437c7 | 1335 | return -EMSGSIZE; |
03f0d916 | 1336 | if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) && |
7d5437c7 PS |
1337 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT)) |
1338 | return -EMSGSIZE; | |
03f0d916 | 1339 | if ((output->tun_flags & TUNNEL_CSUM) && |
7d5437c7 PS |
1340 | nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM)) |
1341 | return -EMSGSIZE; | |
1342 | ||
1343 | nla_nest_end(skb, nla); | |
1344 | return 0; | |
1345 | } | |
1346 | ||
03f0d916 AZ |
1347 | static int metadata_from_nlattrs(struct sw_flow_match *match, u64 *attrs, |
1348 | const struct nlattr **a, bool is_mask) | |
ccb1352e | 1349 | { |
03f0d916 AZ |
1350 | if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) { |
1351 | SW_FLOW_KEY_PUT(match, phy.priority, | |
1352 | nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask); | |
1353 | *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY); | |
1354 | } | |
ccb1352e | 1355 | |
03f0d916 AZ |
1356 | if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) { |
1357 | u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]); | |
ccb1352e | 1358 | |
03f0d916 AZ |
1359 | if (is_mask) |
1360 | in_port = 0xffffffff; /* Always exact match in_port. */ | |
1361 | else if (in_port >= DP_MAX_PORTS) | |
1362 | return -EINVAL; | |
ccb1352e | 1363 | |
03f0d916 AZ |
1364 | SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask); |
1365 | *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT); | |
1366 | } else if (!is_mask) { | |
1367 | SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask); | |
ccb1352e | 1368 | } |
03f0d916 AZ |
1369 | |
1370 | if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) { | |
1371 | uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]); | |
1372 | ||
1373 | SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask); | |
1374 | *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK); | |
ccb1352e | 1375 | } |
03f0d916 AZ |
1376 | if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) { |
1377 | if (ovs_ipv4_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match, | |
1378 | is_mask)) | |
1379 | return -EINVAL; | |
1380 | *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL); | |
39c7caeb | 1381 | } |
03f0d916 AZ |
1382 | return 0; |
1383 | } | |
ccb1352e | 1384 | |
03f0d916 AZ |
1385 | static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs, |
1386 | const struct nlattr **a, bool is_mask) | |
1387 | { | |
1388 | int err; | |
1389 | u64 orig_attrs = attrs; | |
7d5437c7 | 1390 | |
03f0d916 AZ |
1391 | err = metadata_from_nlattrs(match, &attrs, a, is_mask); |
1392 | if (err) | |
1393 | return err; | |
7d5437c7 | 1394 | |
03f0d916 AZ |
1395 | if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) { |
1396 | const struct ovs_key_ethernet *eth_key; | |
ccb1352e | 1397 | |
03f0d916 AZ |
1398 | eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]); |
1399 | SW_FLOW_KEY_MEMCPY(match, eth.src, | |
1400 | eth_key->eth_src, ETH_ALEN, is_mask); | |
1401 | SW_FLOW_KEY_MEMCPY(match, eth.dst, | |
1402 | eth_key->eth_dst, ETH_ALEN, is_mask); | |
1403 | attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET); | |
1404 | } | |
ccb1352e | 1405 | |
03f0d916 | 1406 | if (attrs & (1 << OVS_KEY_ATTR_VLAN)) { |
ccb1352e JG |
1407 | __be16 tci; |
1408 | ||
ccb1352e | 1409 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); |
03f0d916 AZ |
1410 | if (!(tci & htons(VLAN_TAG_PRESENT))) { |
1411 | if (is_mask) | |
1412 | OVS_NLERR("VLAN TCI mask does not have exact match for VLAN_TAG_PRESENT bit.\n"); | |
1413 | else | |
1414 | OVS_NLERR("VLAN TCI does not have VLAN_TAG_PRESENT bit set.\n"); | |
ccb1352e | 1415 | |
ccb1352e JG |
1416 | return -EINVAL; |
1417 | } | |
03f0d916 AZ |
1418 | |
1419 | SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask); | |
1420 | attrs &= ~(1 << OVS_KEY_ATTR_VLAN); | |
1421 | } else if (!is_mask) | |
1422 | SW_FLOW_KEY_PUT(match, eth.tci, htons(0xffff), true); | |
ccb1352e JG |
1423 | |
1424 | if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) { | |
03f0d916 AZ |
1425 | __be16 eth_type; |
1426 | ||
1427 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
1428 | if (is_mask) { | |
1429 | /* Always exact match EtherType. */ | |
1430 | eth_type = htons(0xffff); | |
1431 | } else if (ntohs(eth_type) < ETH_P_802_3_MIN) { | |
1432 | OVS_NLERR("EtherType is less than minimum (type=%x, min=%x).\n", | |
1433 | ntohs(eth_type), ETH_P_802_3_MIN); | |
ccb1352e | 1434 | return -EINVAL; |
03f0d916 AZ |
1435 | } |
1436 | ||
1437 | SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask); | |
ccb1352e | 1438 | attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); |
03f0d916 AZ |
1439 | } else if (!is_mask) { |
1440 | SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask); | |
ccb1352e JG |
1441 | } |
1442 | ||
03f0d916 | 1443 | if (attrs & (1 << OVS_KEY_ATTR_IPV4)) { |
ccb1352e JG |
1444 | const struct ovs_key_ipv4 *ipv4_key; |
1445 | ||
ccb1352e | 1446 | ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]); |
03f0d916 AZ |
1447 | if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) { |
1448 | OVS_NLERR("Unknown IPv4 fragment type (value=%d, max=%d).\n", | |
1449 | ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX); | |
ccb1352e | 1450 | return -EINVAL; |
ccb1352e | 1451 | } |
03f0d916 AZ |
1452 | SW_FLOW_KEY_PUT(match, ip.proto, |
1453 | ipv4_key->ipv4_proto, is_mask); | |
1454 | SW_FLOW_KEY_PUT(match, ip.tos, | |
1455 | ipv4_key->ipv4_tos, is_mask); | |
1456 | SW_FLOW_KEY_PUT(match, ip.ttl, | |
1457 | ipv4_key->ipv4_ttl, is_mask); | |
1458 | SW_FLOW_KEY_PUT(match, ip.frag, | |
1459 | ipv4_key->ipv4_frag, is_mask); | |
1460 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, | |
1461 | ipv4_key->ipv4_src, is_mask); | |
1462 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, | |
1463 | ipv4_key->ipv4_dst, is_mask); | |
1464 | attrs &= ~(1 << OVS_KEY_ATTR_IPV4); | |
1465 | } | |
ccb1352e | 1466 | |
03f0d916 AZ |
1467 | if (attrs & (1 << OVS_KEY_ATTR_IPV6)) { |
1468 | const struct ovs_key_ipv6 *ipv6_key; | |
ccb1352e | 1469 | |
ccb1352e | 1470 | ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]); |
03f0d916 AZ |
1471 | if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) { |
1472 | OVS_NLERR("Unknown IPv6 fragment type (value=%d, max=%d).\n", | |
1473 | ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX); | |
ccb1352e | 1474 | return -EINVAL; |
ccb1352e | 1475 | } |
03f0d916 AZ |
1476 | SW_FLOW_KEY_PUT(match, ipv6.label, |
1477 | ipv6_key->ipv6_label, is_mask); | |
1478 | SW_FLOW_KEY_PUT(match, ip.proto, | |
1479 | ipv6_key->ipv6_proto, is_mask); | |
1480 | SW_FLOW_KEY_PUT(match, ip.tos, | |
1481 | ipv6_key->ipv6_tclass, is_mask); | |
1482 | SW_FLOW_KEY_PUT(match, ip.ttl, | |
1483 | ipv6_key->ipv6_hlimit, is_mask); | |
1484 | SW_FLOW_KEY_PUT(match, ip.frag, | |
1485 | ipv6_key->ipv6_frag, is_mask); | |
1486 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src, | |
1487 | ipv6_key->ipv6_src, | |
1488 | sizeof(match->key->ipv6.addr.src), | |
1489 | is_mask); | |
1490 | SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst, | |
1491 | ipv6_key->ipv6_dst, | |
1492 | sizeof(match->key->ipv6.addr.dst), | |
1493 | is_mask); | |
1494 | ||
1495 | attrs &= ~(1 << OVS_KEY_ATTR_IPV6); | |
1496 | } | |
1497 | ||
1498 | if (attrs & (1 << OVS_KEY_ATTR_ARP)) { | |
ccb1352e JG |
1499 | const struct ovs_key_arp *arp_key; |
1500 | ||
03f0d916 AZ |
1501 | arp_key = nla_data(a[OVS_KEY_ATTR_ARP]); |
1502 | if (!is_mask && (arp_key->arp_op & htons(0xff00))) { | |
1503 | OVS_NLERR("Unknown ARP opcode (opcode=%d).\n", | |
1504 | arp_key->arp_op); | |
ccb1352e | 1505 | return -EINVAL; |
03f0d916 AZ |
1506 | } |
1507 | ||
1508 | SW_FLOW_KEY_PUT(match, ipv4.addr.src, | |
1509 | arp_key->arp_sip, is_mask); | |
1510 | SW_FLOW_KEY_PUT(match, ipv4.addr.dst, | |
1511 | arp_key->arp_tip, is_mask); | |
1512 | SW_FLOW_KEY_PUT(match, ip.proto, | |
1513 | ntohs(arp_key->arp_op), is_mask); | |
1514 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha, | |
1515 | arp_key->arp_sha, ETH_ALEN, is_mask); | |
1516 | SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha, | |
1517 | arp_key->arp_tha, ETH_ALEN, is_mask); | |
1518 | ||
ccb1352e | 1519 | attrs &= ~(1 << OVS_KEY_ATTR_ARP); |
03f0d916 | 1520 | } |
ccb1352e | 1521 | |
03f0d916 AZ |
1522 | if (attrs & (1 << OVS_KEY_ATTR_TCP)) { |
1523 | const struct ovs_key_tcp *tcp_key; | |
1524 | ||
1525 | tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]); | |
1526 | if (orig_attrs & (1 << OVS_KEY_ATTR_IPV4)) { | |
1527 | SW_FLOW_KEY_PUT(match, ipv4.tp.src, | |
1528 | tcp_key->tcp_src, is_mask); | |
1529 | SW_FLOW_KEY_PUT(match, ipv4.tp.dst, | |
1530 | tcp_key->tcp_dst, is_mask); | |
1531 | } else { | |
1532 | SW_FLOW_KEY_PUT(match, ipv6.tp.src, | |
1533 | tcp_key->tcp_src, is_mask); | |
1534 | SW_FLOW_KEY_PUT(match, ipv6.tp.dst, | |
1535 | tcp_key->tcp_dst, is_mask); | |
1536 | } | |
1537 | attrs &= ~(1 << OVS_KEY_ATTR_TCP); | |
1538 | } | |
1539 | ||
1540 | if (attrs & (1 << OVS_KEY_ATTR_UDP)) { | |
1541 | const struct ovs_key_udp *udp_key; | |
1542 | ||
1543 | udp_key = nla_data(a[OVS_KEY_ATTR_UDP]); | |
1544 | if (orig_attrs & (1 << OVS_KEY_ATTR_IPV4)) { | |
1545 | SW_FLOW_KEY_PUT(match, ipv4.tp.src, | |
1546 | udp_key->udp_src, is_mask); | |
1547 | SW_FLOW_KEY_PUT(match, ipv4.tp.dst, | |
1548 | udp_key->udp_dst, is_mask); | |
1549 | } else { | |
1550 | SW_FLOW_KEY_PUT(match, ipv6.tp.src, | |
1551 | udp_key->udp_src, is_mask); | |
1552 | SW_FLOW_KEY_PUT(match, ipv6.tp.dst, | |
1553 | udp_key->udp_dst, is_mask); | |
1554 | } | |
1555 | attrs &= ~(1 << OVS_KEY_ATTR_UDP); | |
1556 | } | |
1557 | ||
a175a723 JS |
1558 | if (attrs & (1 << OVS_KEY_ATTR_SCTP)) { |
1559 | const struct ovs_key_sctp *sctp_key; | |
1560 | ||
1561 | sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]); | |
1562 | if (orig_attrs & (1 << OVS_KEY_ATTR_IPV4)) { | |
1563 | SW_FLOW_KEY_PUT(match, ipv4.tp.src, | |
1564 | sctp_key->sctp_src, is_mask); | |
1565 | SW_FLOW_KEY_PUT(match, ipv4.tp.dst, | |
1566 | sctp_key->sctp_dst, is_mask); | |
1567 | } else { | |
1568 | SW_FLOW_KEY_PUT(match, ipv6.tp.src, | |
1569 | sctp_key->sctp_src, is_mask); | |
1570 | SW_FLOW_KEY_PUT(match, ipv6.tp.dst, | |
1571 | sctp_key->sctp_dst, is_mask); | |
1572 | } | |
1573 | attrs &= ~(1 << OVS_KEY_ATTR_SCTP); | |
1574 | } | |
1575 | ||
03f0d916 AZ |
1576 | if (attrs & (1 << OVS_KEY_ATTR_ICMP)) { |
1577 | const struct ovs_key_icmp *icmp_key; | |
1578 | ||
1579 | icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]); | |
1580 | SW_FLOW_KEY_PUT(match, ipv4.tp.src, | |
1581 | htons(icmp_key->icmp_type), is_mask); | |
1582 | SW_FLOW_KEY_PUT(match, ipv4.tp.dst, | |
1583 | htons(icmp_key->icmp_code), is_mask); | |
1584 | attrs &= ~(1 << OVS_KEY_ATTR_ICMP); | |
1585 | } | |
1586 | ||
1587 | if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) { | |
1588 | const struct ovs_key_icmpv6 *icmpv6_key; | |
1589 | ||
1590 | icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]); | |
1591 | SW_FLOW_KEY_PUT(match, ipv6.tp.src, | |
1592 | htons(icmpv6_key->icmpv6_type), is_mask); | |
1593 | SW_FLOW_KEY_PUT(match, ipv6.tp.dst, | |
1594 | htons(icmpv6_key->icmpv6_code), is_mask); | |
1595 | attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6); | |
1596 | } | |
1597 | ||
1598 | if (attrs & (1 << OVS_KEY_ATTR_ND)) { | |
1599 | const struct ovs_key_nd *nd_key; | |
1600 | ||
1601 | nd_key = nla_data(a[OVS_KEY_ATTR_ND]); | |
1602 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target, | |
1603 | nd_key->nd_target, | |
1604 | sizeof(match->key->ipv6.nd.target), | |
1605 | is_mask); | |
1606 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll, | |
1607 | nd_key->nd_sll, ETH_ALEN, is_mask); | |
1608 | SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll, | |
1609 | nd_key->nd_tll, ETH_ALEN, is_mask); | |
1610 | attrs &= ~(1 << OVS_KEY_ATTR_ND); | |
1611 | } | |
1612 | ||
1613 | if (attrs != 0) | |
1614 | return -EINVAL; | |
1615 | ||
1616 | return 0; | |
1617 | } | |
1618 | ||
1619 | /** | |
1620 | * ovs_match_from_nlattrs - parses Netlink attributes into a flow key and | |
1621 | * mask. In case the 'mask' is NULL, the flow is treated as exact match | |
1622 | * flow. Otherwise, it is treated as a wildcarded flow, except the mask | |
1623 | * does not include any don't care bit. | |
1624 | * @match: receives the extracted flow match information. | |
1625 | * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute | |
1626 | * sequence. The fields should of the packet that triggered the creation | |
1627 | * of this flow. | |
1628 | * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink | |
1629 | * attribute specifies the mask field of the wildcarded flow. | |
1630 | */ | |
1631 | int ovs_match_from_nlattrs(struct sw_flow_match *match, | |
1632 | const struct nlattr *key, | |
1633 | const struct nlattr *mask) | |
1634 | { | |
1635 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; | |
1636 | const struct nlattr *encap; | |
1637 | u64 key_attrs = 0; | |
1638 | u64 mask_attrs = 0; | |
1639 | bool encap_valid = false; | |
1640 | int err; | |
1641 | ||
1642 | err = parse_flow_nlattrs(key, a, &key_attrs); | |
1643 | if (err) | |
1644 | return err; | |
1645 | ||
1646 | if ((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) && | |
1647 | (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) && | |
1648 | (nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]) == htons(ETH_P_8021Q))) { | |
1649 | __be16 tci; | |
1650 | ||
1651 | if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) && | |
1652 | (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) { | |
1653 | OVS_NLERR("Invalid Vlan frame.\n"); | |
ccb1352e | 1654 | return -EINVAL; |
03f0d916 AZ |
1655 | } |
1656 | ||
1657 | key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); | |
1658 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
1659 | encap = a[OVS_KEY_ATTR_ENCAP]; | |
1660 | key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP); | |
1661 | encap_valid = true; | |
1662 | ||
1663 | if (tci & htons(VLAN_TAG_PRESENT)) { | |
1664 | err = parse_flow_nlattrs(encap, a, &key_attrs); | |
1665 | if (err) | |
1666 | return err; | |
1667 | } else if (!tci) { | |
1668 | /* Corner case for truncated 802.1Q header. */ | |
1669 | if (nla_len(encap)) { | |
1670 | OVS_NLERR("Truncated 802.1Q header has non-zero encap attribute.\n"); | |
1671 | return -EINVAL; | |
1672 | } | |
1673 | } else { | |
1674 | OVS_NLERR("Encap attribute is set for a non-VLAN frame.\n"); | |
1675 | return -EINVAL; | |
1676 | } | |
ccb1352e JG |
1677 | } |
1678 | ||
03f0d916 AZ |
1679 | err = ovs_key_from_nlattrs(match, key_attrs, a, false); |
1680 | if (err) | |
1681 | return err; | |
1682 | ||
1683 | if (mask) { | |
1684 | err = parse_flow_mask_nlattrs(mask, a, &mask_attrs); | |
1685 | if (err) | |
1686 | return err; | |
1687 | ||
1688 | if (mask_attrs & 1ULL << OVS_KEY_ATTR_ENCAP) { | |
1689 | __be16 eth_type = 0; | |
1690 | __be16 tci = 0; | |
1691 | ||
1692 | if (!encap_valid) { | |
1693 | OVS_NLERR("Encap mask attribute is set for non-VLAN frame.\n"); | |
1694 | return -EINVAL; | |
1695 | } | |
1696 | ||
1697 | mask_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP); | |
1698 | if (a[OVS_KEY_ATTR_ETHERTYPE]) | |
1699 | eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); | |
1700 | ||
1701 | if (eth_type == htons(0xffff)) { | |
1702 | mask_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); | |
1703 | encap = a[OVS_KEY_ATTR_ENCAP]; | |
1704 | err = parse_flow_mask_nlattrs(encap, a, &mask_attrs); | |
1705 | } else { | |
1706 | OVS_NLERR("VLAN frames must have an exact match on the TPID (mask=%x).\n", | |
1707 | ntohs(eth_type)); | |
1708 | return -EINVAL; | |
1709 | } | |
1710 | ||
1711 | if (a[OVS_KEY_ATTR_VLAN]) | |
1712 | tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); | |
1713 | ||
1714 | if (!(tci & htons(VLAN_TAG_PRESENT))) { | |
1715 | OVS_NLERR("VLAN tag present bit must have an exact match (tci_mask=%x).\n", ntohs(tci)); | |
1716 | return -EINVAL; | |
1717 | } | |
1718 | } | |
1719 | ||
1720 | err = ovs_key_from_nlattrs(match, mask_attrs, a, true); | |
1721 | if (err) | |
1722 | return err; | |
1723 | } else { | |
1724 | /* Populate exact match flow's key mask. */ | |
1725 | if (match->mask) | |
1726 | ovs_sw_flow_mask_set(match->mask, &match->range, 0xff); | |
1727 | } | |
1728 | ||
1729 | if (!ovs_match_validate(match, key_attrs, mask_attrs)) | |
ccb1352e | 1730 | return -EINVAL; |
ccb1352e JG |
1731 | |
1732 | return 0; | |
1733 | } | |
1734 | ||
1735 | /** | |
1736 | * ovs_flow_metadata_from_nlattrs - parses Netlink attributes into a flow key. | |
93d8fd15 PS |
1737 | * @flow: Receives extracted in_port, priority, tun_key and skb_mark. |
1738 | * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute | |
ccb1352e JG |
1739 | * sequence. |
1740 | * | |
1741 | * This parses a series of Netlink attributes that form a flow key, which must | |
1742 | * take the same form accepted by flow_from_nlattrs(), but only enough of it to | |
1743 | * get the metadata, that is, the parts of the flow key that cannot be | |
1744 | * extracted from the packet itself. | |
1745 | */ | |
03f0d916 AZ |
1746 | |
1747 | int ovs_flow_metadata_from_nlattrs(struct sw_flow *flow, | |
1748 | const struct nlattr *attr) | |
ccb1352e | 1749 | { |
7d5437c7 | 1750 | struct ovs_key_ipv4_tunnel *tun_key = &flow->key.tun_key; |
03f0d916 AZ |
1751 | const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; |
1752 | u64 attrs = 0; | |
1753 | int err; | |
1754 | struct sw_flow_match match; | |
ccb1352e | 1755 | |
93d8fd15 PS |
1756 | flow->key.phy.in_port = DP_MAX_PORTS; |
1757 | flow->key.phy.priority = 0; | |
1758 | flow->key.phy.skb_mark = 0; | |
7d5437c7 | 1759 | memset(tun_key, 0, sizeof(flow->key.tun_key)); |
ccb1352e | 1760 | |
03f0d916 AZ |
1761 | err = parse_flow_nlattrs(attr, a, &attrs); |
1762 | if (err) | |
ccb1352e | 1763 | return -EINVAL; |
a3e82996 | 1764 | |
03f0d916 AZ |
1765 | memset(&match, 0, sizeof(match)); |
1766 | match.key = &flow->key; | |
1767 | ||
1768 | err = metadata_from_nlattrs(&match, &attrs, a, false); | |
1769 | if (err) | |
1770 | return err; | |
a3e82996 | 1771 | |
ccb1352e JG |
1772 | return 0; |
1773 | } | |
1774 | ||
03f0d916 AZ |
1775 | int ovs_flow_to_nlattrs(const struct sw_flow_key *swkey, |
1776 | const struct sw_flow_key *output, struct sk_buff *skb) | |
ccb1352e JG |
1777 | { |
1778 | struct ovs_key_ethernet *eth_key; | |
1779 | struct nlattr *nla, *encap; | |
03f0d916 | 1780 | bool is_mask = (swkey != output); |
ccb1352e | 1781 | |
03f0d916 | 1782 | if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority)) |
028d6a67 | 1783 | goto nla_put_failure; |
ccb1352e | 1784 | |
03f0d916 AZ |
1785 | if ((swkey->tun_key.ipv4_dst || is_mask) && |
1786 | ovs_ipv4_tun_to_nlattr(skb, &swkey->tun_key, &output->tun_key)) | |
7d5437c7 PS |
1787 | goto nla_put_failure; |
1788 | ||
03f0d916 AZ |
1789 | if (swkey->phy.in_port == DP_MAX_PORTS) { |
1790 | if (is_mask && (output->phy.in_port == 0xffff)) | |
1791 | if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff)) | |
1792 | goto nla_put_failure; | |
1793 | } else { | |
1794 | u16 upper_u16; | |
1795 | upper_u16 = !is_mask ? 0 : 0xffff; | |
ccb1352e | 1796 | |
03f0d916 AZ |
1797 | if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, |
1798 | (upper_u16 << 16) | output->phy.in_port)) | |
1799 | goto nla_put_failure; | |
1800 | } | |
1801 | ||
1802 | if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark)) | |
39c7caeb AA |
1803 | goto nla_put_failure; |
1804 | ||
ccb1352e JG |
1805 | nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key)); |
1806 | if (!nla) | |
1807 | goto nla_put_failure; | |
03f0d916 | 1808 | |
ccb1352e | 1809 | eth_key = nla_data(nla); |
03f0d916 AZ |
1810 | memcpy(eth_key->eth_src, output->eth.src, ETH_ALEN); |
1811 | memcpy(eth_key->eth_dst, output->eth.dst, ETH_ALEN); | |
ccb1352e JG |
1812 | |
1813 | if (swkey->eth.tci || swkey->eth.type == htons(ETH_P_8021Q)) { | |
03f0d916 AZ |
1814 | __be16 eth_type; |
1815 | eth_type = !is_mask ? htons(ETH_P_8021Q) : htons(0xffff); | |
1816 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) || | |
1817 | nla_put_be16(skb, OVS_KEY_ATTR_VLAN, output->eth.tci)) | |
028d6a67 | 1818 | goto nla_put_failure; |
ccb1352e JG |
1819 | encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP); |
1820 | if (!swkey->eth.tci) | |
1821 | goto unencap; | |
03f0d916 | 1822 | } else |
ccb1352e | 1823 | encap = NULL; |
ccb1352e | 1824 | |
03f0d916 AZ |
1825 | if (swkey->eth.type == htons(ETH_P_802_2)) { |
1826 | /* | |
1827 | * Ethertype 802.2 is represented in the netlink with omitted | |
1828 | * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and | |
1829 | * 0xffff in the mask attribute. Ethertype can also | |
1830 | * be wildcarded. | |
1831 | */ | |
1832 | if (is_mask && output->eth.type) | |
1833 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, | |
1834 | output->eth.type)) | |
1835 | goto nla_put_failure; | |
ccb1352e | 1836 | goto unencap; |
03f0d916 | 1837 | } |
ccb1352e | 1838 | |
03f0d916 | 1839 | if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type)) |
028d6a67 | 1840 | goto nla_put_failure; |
ccb1352e JG |
1841 | |
1842 | if (swkey->eth.type == htons(ETH_P_IP)) { | |
1843 | struct ovs_key_ipv4 *ipv4_key; | |
1844 | ||
1845 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key)); | |
1846 | if (!nla) | |
1847 | goto nla_put_failure; | |
1848 | ipv4_key = nla_data(nla); | |
03f0d916 AZ |
1849 | ipv4_key->ipv4_src = output->ipv4.addr.src; |
1850 | ipv4_key->ipv4_dst = output->ipv4.addr.dst; | |
1851 | ipv4_key->ipv4_proto = output->ip.proto; | |
1852 | ipv4_key->ipv4_tos = output->ip.tos; | |
1853 | ipv4_key->ipv4_ttl = output->ip.ttl; | |
1854 | ipv4_key->ipv4_frag = output->ip.frag; | |
ccb1352e JG |
1855 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { |
1856 | struct ovs_key_ipv6 *ipv6_key; | |
1857 | ||
1858 | nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key)); | |
1859 | if (!nla) | |
1860 | goto nla_put_failure; | |
1861 | ipv6_key = nla_data(nla); | |
03f0d916 | 1862 | memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src, |
ccb1352e | 1863 | sizeof(ipv6_key->ipv6_src)); |
03f0d916 | 1864 | memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst, |
ccb1352e | 1865 | sizeof(ipv6_key->ipv6_dst)); |
03f0d916 AZ |
1866 | ipv6_key->ipv6_label = output->ipv6.label; |
1867 | ipv6_key->ipv6_proto = output->ip.proto; | |
1868 | ipv6_key->ipv6_tclass = output->ip.tos; | |
1869 | ipv6_key->ipv6_hlimit = output->ip.ttl; | |
1870 | ipv6_key->ipv6_frag = output->ip.frag; | |
c0618533 MM |
1871 | } else if (swkey->eth.type == htons(ETH_P_ARP) || |
1872 | swkey->eth.type == htons(ETH_P_RARP)) { | |
ccb1352e JG |
1873 | struct ovs_key_arp *arp_key; |
1874 | ||
1875 | nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key)); | |
1876 | if (!nla) | |
1877 | goto nla_put_failure; | |
1878 | arp_key = nla_data(nla); | |
1879 | memset(arp_key, 0, sizeof(struct ovs_key_arp)); | |
03f0d916 AZ |
1880 | arp_key->arp_sip = output->ipv4.addr.src; |
1881 | arp_key->arp_tip = output->ipv4.addr.dst; | |
1882 | arp_key->arp_op = htons(output->ip.proto); | |
1883 | memcpy(arp_key->arp_sha, output->ipv4.arp.sha, ETH_ALEN); | |
1884 | memcpy(arp_key->arp_tha, output->ipv4.arp.tha, ETH_ALEN); | |
ccb1352e JG |
1885 | } |
1886 | ||
1887 | if ((swkey->eth.type == htons(ETH_P_IP) || | |
1888 | swkey->eth.type == htons(ETH_P_IPV6)) && | |
1889 | swkey->ip.frag != OVS_FRAG_TYPE_LATER) { | |
1890 | ||
1891 | if (swkey->ip.proto == IPPROTO_TCP) { | |
1892 | struct ovs_key_tcp *tcp_key; | |
1893 | ||
1894 | nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key)); | |
1895 | if (!nla) | |
1896 | goto nla_put_failure; | |
1897 | tcp_key = nla_data(nla); | |
1898 | if (swkey->eth.type == htons(ETH_P_IP)) { | |
03f0d916 AZ |
1899 | tcp_key->tcp_src = output->ipv4.tp.src; |
1900 | tcp_key->tcp_dst = output->ipv4.tp.dst; | |
ccb1352e | 1901 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { |
03f0d916 AZ |
1902 | tcp_key->tcp_src = output->ipv6.tp.src; |
1903 | tcp_key->tcp_dst = output->ipv6.tp.dst; | |
ccb1352e JG |
1904 | } |
1905 | } else if (swkey->ip.proto == IPPROTO_UDP) { | |
1906 | struct ovs_key_udp *udp_key; | |
1907 | ||
1908 | nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key)); | |
1909 | if (!nla) | |
1910 | goto nla_put_failure; | |
1911 | udp_key = nla_data(nla); | |
1912 | if (swkey->eth.type == htons(ETH_P_IP)) { | |
03f0d916 AZ |
1913 | udp_key->udp_src = output->ipv4.tp.src; |
1914 | udp_key->udp_dst = output->ipv4.tp.dst; | |
ccb1352e | 1915 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { |
03f0d916 AZ |
1916 | udp_key->udp_src = output->ipv6.tp.src; |
1917 | udp_key->udp_dst = output->ipv6.tp.dst; | |
ccb1352e | 1918 | } |
a175a723 JS |
1919 | } else if (swkey->ip.proto == IPPROTO_SCTP) { |
1920 | struct ovs_key_sctp *sctp_key; | |
1921 | ||
1922 | nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key)); | |
1923 | if (!nla) | |
1924 | goto nla_put_failure; | |
1925 | sctp_key = nla_data(nla); | |
1926 | if (swkey->eth.type == htons(ETH_P_IP)) { | |
1927 | sctp_key->sctp_src = swkey->ipv4.tp.src; | |
1928 | sctp_key->sctp_dst = swkey->ipv4.tp.dst; | |
1929 | } else if (swkey->eth.type == htons(ETH_P_IPV6)) { | |
1930 | sctp_key->sctp_src = swkey->ipv6.tp.src; | |
1931 | sctp_key->sctp_dst = swkey->ipv6.tp.dst; | |
1932 | } | |
ccb1352e JG |
1933 | } else if (swkey->eth.type == htons(ETH_P_IP) && |
1934 | swkey->ip.proto == IPPROTO_ICMP) { | |
1935 | struct ovs_key_icmp *icmp_key; | |
1936 | ||
1937 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key)); | |
1938 | if (!nla) | |
1939 | goto nla_put_failure; | |
1940 | icmp_key = nla_data(nla); | |
03f0d916 AZ |
1941 | icmp_key->icmp_type = ntohs(output->ipv4.tp.src); |
1942 | icmp_key->icmp_code = ntohs(output->ipv4.tp.dst); | |
ccb1352e JG |
1943 | } else if (swkey->eth.type == htons(ETH_P_IPV6) && |
1944 | swkey->ip.proto == IPPROTO_ICMPV6) { | |
1945 | struct ovs_key_icmpv6 *icmpv6_key; | |
1946 | ||
1947 | nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6, | |
1948 | sizeof(*icmpv6_key)); | |
1949 | if (!nla) | |
1950 | goto nla_put_failure; | |
1951 | icmpv6_key = nla_data(nla); | |
03f0d916 AZ |
1952 | icmpv6_key->icmpv6_type = ntohs(output->ipv6.tp.src); |
1953 | icmpv6_key->icmpv6_code = ntohs(output->ipv6.tp.dst); | |
ccb1352e JG |
1954 | |
1955 | if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION || | |
1956 | icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) { | |
1957 | struct ovs_key_nd *nd_key; | |
1958 | ||
1959 | nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key)); | |
1960 | if (!nla) | |
1961 | goto nla_put_failure; | |
1962 | nd_key = nla_data(nla); | |
03f0d916 | 1963 | memcpy(nd_key->nd_target, &output->ipv6.nd.target, |
ccb1352e | 1964 | sizeof(nd_key->nd_target)); |
03f0d916 AZ |
1965 | memcpy(nd_key->nd_sll, output->ipv6.nd.sll, ETH_ALEN); |
1966 | memcpy(nd_key->nd_tll, output->ipv6.nd.tll, ETH_ALEN); | |
ccb1352e JG |
1967 | } |
1968 | } | |
1969 | } | |
1970 | ||
1971 | unencap: | |
1972 | if (encap) | |
1973 | nla_nest_end(skb, encap); | |
1974 | ||
1975 | return 0; | |
1976 | ||
1977 | nla_put_failure: | |
1978 | return -EMSGSIZE; | |
1979 | } | |
1980 | ||
1981 | /* Initializes the flow module. | |
1982 | * Returns zero if successful or a negative error code. */ | |
1983 | int ovs_flow_init(void) | |
1984 | { | |
0d40f75b | 1985 | BUILD_BUG_ON(__alignof__(struct sw_flow_key) % __alignof__(long)); |
5828cd9a AZ |
1986 | BUILD_BUG_ON(sizeof(struct sw_flow_key) % sizeof(long)); |
1987 | ||
ccb1352e JG |
1988 | flow_cache = kmem_cache_create("sw_flow", sizeof(struct sw_flow), 0, |
1989 | 0, NULL); | |
1990 | if (flow_cache == NULL) | |
1991 | return -ENOMEM; | |
1992 | ||
1993 | return 0; | |
1994 | } | |
1995 | ||
1996 | /* Uninitializes the flow module. */ | |
1997 | void ovs_flow_exit(void) | |
1998 | { | |
1999 | kmem_cache_destroy(flow_cache); | |
2000 | } | |
03f0d916 AZ |
2001 | |
2002 | struct sw_flow_mask *ovs_sw_flow_mask_alloc(void) | |
2003 | { | |
2004 | struct sw_flow_mask *mask; | |
2005 | ||
2006 | mask = kmalloc(sizeof(*mask), GFP_KERNEL); | |
2007 | if (mask) | |
2008 | mask->ref_count = 0; | |
2009 | ||
2010 | return mask; | |
2011 | } | |
2012 | ||
2013 | void ovs_sw_flow_mask_add_ref(struct sw_flow_mask *mask) | |
2014 | { | |
2015 | mask->ref_count++; | |
2016 | } | |
2017 | ||
2018 | void ovs_sw_flow_mask_del_ref(struct sw_flow_mask *mask, bool deferred) | |
2019 | { | |
2020 | if (!mask) | |
2021 | return; | |
2022 | ||
2023 | BUG_ON(!mask->ref_count); | |
2024 | mask->ref_count--; | |
2025 | ||
2026 | if (!mask->ref_count) { | |
2027 | list_del_rcu(&mask->list); | |
2028 | if (deferred) | |
2029 | kfree_rcu(mask, rcu); | |
2030 | else | |
2031 | kfree(mask); | |
2032 | } | |
2033 | } | |
2034 | ||
2035 | static bool ovs_sw_flow_mask_equal(const struct sw_flow_mask *a, | |
2036 | const struct sw_flow_mask *b) | |
2037 | { | |
2038 | u8 *a_ = (u8 *)&a->key + a->range.start; | |
2039 | u8 *b_ = (u8 *)&b->key + b->range.start; | |
2040 | ||
2041 | return (a->range.end == b->range.end) | |
2042 | && (a->range.start == b->range.start) | |
5828cd9a | 2043 | && (memcmp(a_, b_, range_n_bytes(&a->range)) == 0); |
03f0d916 AZ |
2044 | } |
2045 | ||
2046 | struct sw_flow_mask *ovs_sw_flow_mask_find(const struct flow_table *tbl, | |
2047 | const struct sw_flow_mask *mask) | |
2048 | { | |
2049 | struct list_head *ml; | |
2050 | ||
2051 | list_for_each(ml, tbl->mask_list) { | |
2052 | struct sw_flow_mask *m; | |
2053 | m = container_of(ml, struct sw_flow_mask, list); | |
2054 | if (ovs_sw_flow_mask_equal(mask, m)) | |
2055 | return m; | |
2056 | } | |
2057 | ||
2058 | return NULL; | |
2059 | } | |
2060 | ||
2061 | /** | |
2062 | * add a new mask into the mask list. | |
2063 | * The caller needs to make sure that 'mask' is not the same | |
2064 | * as any masks that are already on the list. | |
2065 | */ | |
2066 | void ovs_sw_flow_mask_insert(struct flow_table *tbl, struct sw_flow_mask *mask) | |
2067 | { | |
2068 | list_add_rcu(&mask->list, tbl->mask_list); | |
2069 | } | |
2070 | ||
2071 | /** | |
2072 | * Set 'range' fields in the mask to the value of 'val'. | |
2073 | */ | |
2074 | static void ovs_sw_flow_mask_set(struct sw_flow_mask *mask, | |
2075 | struct sw_flow_key_range *range, u8 val) | |
2076 | { | |
2077 | u8 *m = (u8 *)&mask->key + range->start; | |
2078 | ||
2079 | mask->range = *range; | |
5828cd9a | 2080 | memset(m, val, range_n_bytes(range)); |
03f0d916 | 2081 | } |