Commit | Line | Data |
---|---|---|
ccb1352e | 1 | /* |
971427f3 | 2 | * Copyright (c) 2007-2014 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 | ||
ccb1352e JG |
19 | #include <linux/uaccess.h> |
20 | #include <linux/netdevice.h> | |
21 | #include <linux/etherdevice.h> | |
22 | #include <linux/if_ether.h> | |
23 | #include <linux/if_vlan.h> | |
24 | #include <net/llc_pdu.h> | |
25 | #include <linux/kernel.h> | |
26 | #include <linux/jhash.h> | |
27 | #include <linux/jiffies.h> | |
28 | #include <linux/llc.h> | |
29 | #include <linux/module.h> | |
30 | #include <linux/in.h> | |
31 | #include <linux/rcupdate.h> | |
32 | #include <linux/if_arp.h> | |
ccb1352e JG |
33 | #include <linux/ip.h> |
34 | #include <linux/ipv6.h> | |
25cd9ba0 | 35 | #include <linux/mpls.h> |
a175a723 | 36 | #include <linux/sctp.h> |
e298e505 | 37 | #include <linux/smp.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 | 45 | #include <net/ipv6.h> |
25cd9ba0 | 46 | #include <net/mpls.h> |
ccb1352e JG |
47 | #include <net/ndisc.h> |
48 | ||
83c8df26 PS |
49 | #include "datapath.h" |
50 | #include "flow.h" | |
51 | #include "flow_netlink.h" | |
52 | ||
e6445719 | 53 | u64 ovs_flow_used_time(unsigned long flow_jiffies) |
03f0d916 | 54 | { |
e6445719 PS |
55 | struct timespec cur_ts; |
56 | u64 cur_ms, idle_ms; | |
03f0d916 | 57 | |
e6445719 PS |
58 | ktime_get_ts(&cur_ts); |
59 | idle_ms = jiffies_to_msecs(jiffies - flow_jiffies); | |
60 | cur_ms = (u64)cur_ts.tv_sec * MSEC_PER_SEC + | |
61 | cur_ts.tv_nsec / NSEC_PER_MSEC; | |
03f0d916 | 62 | |
e6445719 | 63 | return cur_ms - idle_ms; |
5828cd9a AZ |
64 | } |
65 | ||
df23e9f6 | 66 | #define TCP_FLAGS_BE16(tp) (*(__be16 *)&tcp_flag_word(tp) & htons(0x0FFF)) |
03f0d916 | 67 | |
ad552007 | 68 | void ovs_flow_stats_update(struct sw_flow *flow, __be16 tcp_flags, |
12eb18f7 | 69 | const struct sk_buff *skb) |
03f0d916 | 70 | { |
e298e505 | 71 | struct flow_stats *stats; |
63e7959c | 72 | int node = numa_node_id(); |
03f0d916 | 73 | |
63e7959c | 74 | stats = rcu_dereference(flow->stats[node]); |
e298e505 | 75 | |
63e7959c JR |
76 | /* Check if already have node-specific stats. */ |
77 | if (likely(stats)) { | |
78 | spin_lock(&stats->lock); | |
79 | /* Mark if we write on the pre-allocated stats. */ | |
80 | if (node == 0 && unlikely(flow->stats_last_writer != node)) | |
81 | flow->stats_last_writer = node; | |
82 | } else { | |
83 | stats = rcu_dereference(flow->stats[0]); /* Pre-allocated. */ | |
84 | spin_lock(&stats->lock); | |
85 | ||
86 | /* If the current NUMA-node is the only writer on the | |
87 | * pre-allocated stats keep using them. | |
88 | */ | |
89 | if (unlikely(flow->stats_last_writer != node)) { | |
90 | /* A previous locker may have already allocated the | |
91 | * stats, so we need to check again. If node-specific | |
92 | * stats were already allocated, we update the pre- | |
93 | * allocated stats as we have already locked them. | |
94 | */ | |
95 | if (likely(flow->stats_last_writer != NUMA_NO_NODE) | |
8c6b00c8 | 96 | && likely(!rcu_access_pointer(flow->stats[node]))) { |
63e7959c JR |
97 | /* Try to allocate node-specific stats. */ |
98 | struct flow_stats *new_stats; | |
99 | ||
100 | new_stats = | |
101 | kmem_cache_alloc_node(flow_stats_cache, | |
102 | GFP_THISNODE | | |
103 | __GFP_NOMEMALLOC, | |
104 | node); | |
105 | if (likely(new_stats)) { | |
106 | new_stats->used = jiffies; | |
107 | new_stats->packet_count = 1; | |
108 | new_stats->byte_count = skb->len; | |
109 | new_stats->tcp_flags = tcp_flags; | |
110 | spin_lock_init(&new_stats->lock); | |
111 | ||
112 | rcu_assign_pointer(flow->stats[node], | |
113 | new_stats); | |
114 | goto unlock; | |
115 | } | |
116 | } | |
117 | flow->stats_last_writer = node; | |
118 | } | |
119 | } | |
120 | ||
e298e505 PS |
121 | stats->used = jiffies; |
122 | stats->packet_count++; | |
123 | stats->byte_count += skb->len; | |
124 | stats->tcp_flags |= tcp_flags; | |
63e7959c | 125 | unlock: |
e298e505 PS |
126 | spin_unlock(&stats->lock); |
127 | } | |
128 | ||
86ec8dba JR |
129 | /* Must be called with rcu_read_lock or ovs_mutex. */ |
130 | void ovs_flow_stats_get(const struct sw_flow *flow, | |
131 | struct ovs_flow_stats *ovs_stats, | |
e298e505 PS |
132 | unsigned long *used, __be16 *tcp_flags) |
133 | { | |
63e7959c | 134 | int node; |
e298e505 PS |
135 | |
136 | *used = 0; | |
137 | *tcp_flags = 0; | |
138 | memset(ovs_stats, 0, sizeof(*ovs_stats)); | |
139 | ||
63e7959c | 140 | for_each_node(node) { |
86ec8dba | 141 | struct flow_stats *stats = rcu_dereference_ovsl(flow->stats[node]); |
63e7959c JR |
142 | |
143 | if (stats) { | |
144 | /* Local CPU may write on non-local stats, so we must | |
145 | * block bottom-halves here. | |
146 | */ | |
147 | spin_lock_bh(&stats->lock); | |
148 | if (!*used || time_after(stats->used, *used)) | |
149 | *used = stats->used; | |
150 | *tcp_flags |= stats->tcp_flags; | |
151 | ovs_stats->n_packets += stats->packet_count; | |
152 | ovs_stats->n_bytes += stats->byte_count; | |
153 | spin_unlock_bh(&stats->lock); | |
154 | } | |
e298e505 | 155 | } |
e298e505 PS |
156 | } |
157 | ||
86ec8dba | 158 | /* Called with ovs_mutex. */ |
e298e505 PS |
159 | void ovs_flow_stats_clear(struct sw_flow *flow) |
160 | { | |
63e7959c JR |
161 | int node; |
162 | ||
163 | for_each_node(node) { | |
86ec8dba | 164 | struct flow_stats *stats = ovsl_dereference(flow->stats[node]); |
63e7959c JR |
165 | |
166 | if (stats) { | |
167 | spin_lock_bh(&stats->lock); | |
168 | stats->used = 0; | |
169 | stats->packet_count = 0; | |
170 | stats->byte_count = 0; | |
171 | stats->tcp_flags = 0; | |
172 | spin_unlock_bh(&stats->lock); | |
173 | } | |
174 | } | |
03f0d916 AZ |
175 | } |
176 | ||
ccb1352e JG |
177 | static int check_header(struct sk_buff *skb, int len) |
178 | { | |
179 | if (unlikely(skb->len < len)) | |
180 | return -EINVAL; | |
181 | if (unlikely(!pskb_may_pull(skb, len))) | |
182 | return -ENOMEM; | |
183 | return 0; | |
184 | } | |
185 | ||
186 | static bool arphdr_ok(struct sk_buff *skb) | |
187 | { | |
188 | return pskb_may_pull(skb, skb_network_offset(skb) + | |
189 | sizeof(struct arp_eth_header)); | |
190 | } | |
191 | ||
192 | static int check_iphdr(struct sk_buff *skb) | |
193 | { | |
194 | unsigned int nh_ofs = skb_network_offset(skb); | |
195 | unsigned int ip_len; | |
196 | int err; | |
197 | ||
198 | err = check_header(skb, nh_ofs + sizeof(struct iphdr)); | |
199 | if (unlikely(err)) | |
200 | return err; | |
201 | ||
202 | ip_len = ip_hdrlen(skb); | |
203 | if (unlikely(ip_len < sizeof(struct iphdr) || | |
204 | skb->len < nh_ofs + ip_len)) | |
205 | return -EINVAL; | |
206 | ||
207 | skb_set_transport_header(skb, nh_ofs + ip_len); | |
208 | return 0; | |
209 | } | |
210 | ||
211 | static bool tcphdr_ok(struct sk_buff *skb) | |
212 | { | |
213 | int th_ofs = skb_transport_offset(skb); | |
214 | int tcp_len; | |
215 | ||
216 | if (unlikely(!pskb_may_pull(skb, th_ofs + sizeof(struct tcphdr)))) | |
217 | return false; | |
218 | ||
219 | tcp_len = tcp_hdrlen(skb); | |
220 | if (unlikely(tcp_len < sizeof(struct tcphdr) || | |
221 | skb->len < th_ofs + tcp_len)) | |
222 | return false; | |
223 | ||
224 | return true; | |
225 | } | |
226 | ||
227 | static bool udphdr_ok(struct sk_buff *skb) | |
228 | { | |
229 | return pskb_may_pull(skb, skb_transport_offset(skb) + | |
230 | sizeof(struct udphdr)); | |
231 | } | |
232 | ||
a175a723 JS |
233 | static bool sctphdr_ok(struct sk_buff *skb) |
234 | { | |
235 | return pskb_may_pull(skb, skb_transport_offset(skb) + | |
236 | sizeof(struct sctphdr)); | |
237 | } | |
238 | ||
ccb1352e JG |
239 | static bool icmphdr_ok(struct sk_buff *skb) |
240 | { | |
241 | return pskb_may_pull(skb, skb_transport_offset(skb) + | |
242 | sizeof(struct icmphdr)); | |
243 | } | |
244 | ||
03f0d916 | 245 | static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key) |
ccb1352e JG |
246 | { |
247 | unsigned int nh_ofs = skb_network_offset(skb); | |
248 | unsigned int nh_len; | |
249 | int payload_ofs; | |
250 | struct ipv6hdr *nh; | |
251 | uint8_t nexthdr; | |
252 | __be16 frag_off; | |
253 | int err; | |
254 | ||
ccb1352e JG |
255 | err = check_header(skb, nh_ofs + sizeof(*nh)); |
256 | if (unlikely(err)) | |
257 | return err; | |
258 | ||
259 | nh = ipv6_hdr(skb); | |
260 | nexthdr = nh->nexthdr; | |
261 | payload_ofs = (u8 *)(nh + 1) - skb->data; | |
262 | ||
263 | key->ip.proto = NEXTHDR_NONE; | |
264 | key->ip.tos = ipv6_get_dsfield(nh); | |
265 | key->ip.ttl = nh->hop_limit; | |
266 | key->ipv6.label = *(__be32 *)nh & htonl(IPV6_FLOWINFO_FLOWLABEL); | |
267 | key->ipv6.addr.src = nh->saddr; | |
268 | key->ipv6.addr.dst = nh->daddr; | |
269 | ||
270 | payload_ofs = ipv6_skip_exthdr(skb, payload_ofs, &nexthdr, &frag_off); | |
271 | if (unlikely(payload_ofs < 0)) | |
272 | return -EINVAL; | |
273 | ||
274 | if (frag_off) { | |
275 | if (frag_off & htons(~0x7)) | |
276 | key->ip.frag = OVS_FRAG_TYPE_LATER; | |
277 | else | |
278 | key->ip.frag = OVS_FRAG_TYPE_FIRST; | |
25ef1328 PS |
279 | } else { |
280 | key->ip.frag = OVS_FRAG_TYPE_NONE; | |
ccb1352e JG |
281 | } |
282 | ||
283 | nh_len = payload_ofs - nh_ofs; | |
284 | skb_set_transport_header(skb, nh_ofs + nh_len); | |
285 | key->ip.proto = nexthdr; | |
286 | return nh_len; | |
287 | } | |
288 | ||
289 | static bool icmp6hdr_ok(struct sk_buff *skb) | |
290 | { | |
291 | return pskb_may_pull(skb, skb_transport_offset(skb) + | |
292 | sizeof(struct icmp6hdr)); | |
293 | } | |
294 | ||
ccb1352e JG |
295 | static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key) |
296 | { | |
297 | struct qtag_prefix { | |
298 | __be16 eth_type; /* ETH_P_8021Q */ | |
299 | __be16 tci; | |
300 | }; | |
301 | struct qtag_prefix *qp; | |
302 | ||
303 | if (unlikely(skb->len < sizeof(struct qtag_prefix) + sizeof(__be16))) | |
304 | return 0; | |
305 | ||
306 | if (unlikely(!pskb_may_pull(skb, sizeof(struct qtag_prefix) + | |
307 | sizeof(__be16)))) | |
308 | return -ENOMEM; | |
309 | ||
310 | qp = (struct qtag_prefix *) skb->data; | |
311 | key->eth.tci = qp->tci | htons(VLAN_TAG_PRESENT); | |
312 | __skb_pull(skb, sizeof(struct qtag_prefix)); | |
313 | ||
314 | return 0; | |
315 | } | |
316 | ||
317 | static __be16 parse_ethertype(struct sk_buff *skb) | |
318 | { | |
319 | struct llc_snap_hdr { | |
320 | u8 dsap; /* Always 0xAA */ | |
321 | u8 ssap; /* Always 0xAA */ | |
322 | u8 ctrl; | |
323 | u8 oui[3]; | |
324 | __be16 ethertype; | |
325 | }; | |
326 | struct llc_snap_hdr *llc; | |
327 | __be16 proto; | |
328 | ||
329 | proto = *(__be16 *) skb->data; | |
330 | __skb_pull(skb, sizeof(__be16)); | |
331 | ||
e5c5d22e | 332 | if (ntohs(proto) >= ETH_P_802_3_MIN) |
ccb1352e JG |
333 | return proto; |
334 | ||
335 | if (skb->len < sizeof(struct llc_snap_hdr)) | |
336 | return htons(ETH_P_802_2); | |
337 | ||
338 | if (unlikely(!pskb_may_pull(skb, sizeof(struct llc_snap_hdr)))) | |
339 | return htons(0); | |
340 | ||
341 | llc = (struct llc_snap_hdr *) skb->data; | |
342 | if (llc->dsap != LLC_SAP_SNAP || | |
343 | llc->ssap != LLC_SAP_SNAP || | |
344 | (llc->oui[0] | llc->oui[1] | llc->oui[2]) != 0) | |
345 | return htons(ETH_P_802_2); | |
346 | ||
347 | __skb_pull(skb, sizeof(struct llc_snap_hdr)); | |
17b682a0 | 348 | |
e5c5d22e | 349 | if (ntohs(llc->ethertype) >= ETH_P_802_3_MIN) |
17b682a0 RL |
350 | return llc->ethertype; |
351 | ||
352 | return htons(ETH_P_802_2); | |
ccb1352e JG |
353 | } |
354 | ||
355 | static int parse_icmpv6(struct sk_buff *skb, struct sw_flow_key *key, | |
03f0d916 | 356 | int nh_len) |
ccb1352e JG |
357 | { |
358 | struct icmp6hdr *icmp = icmp6_hdr(skb); | |
ccb1352e JG |
359 | |
360 | /* The ICMPv6 type and code fields use the 16-bit transport port | |
361 | * fields, so we need to store them in 16-bit network byte order. | |
362 | */ | |
1139e241 JR |
363 | key->tp.src = htons(icmp->icmp6_type); |
364 | key->tp.dst = htons(icmp->icmp6_code); | |
25ef1328 | 365 | memset(&key->ipv6.nd, 0, sizeof(key->ipv6.nd)); |
ccb1352e JG |
366 | |
367 | if (icmp->icmp6_code == 0 && | |
368 | (icmp->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION || | |
369 | icmp->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT)) { | |
370 | int icmp_len = skb->len - skb_transport_offset(skb); | |
371 | struct nd_msg *nd; | |
372 | int offset; | |
373 | ||
ccb1352e JG |
374 | /* In order to process neighbor discovery options, we need the |
375 | * entire packet. | |
376 | */ | |
377 | if (unlikely(icmp_len < sizeof(*nd))) | |
03f0d916 AZ |
378 | return 0; |
379 | ||
380 | if (unlikely(skb_linearize(skb))) | |
381 | return -ENOMEM; | |
ccb1352e JG |
382 | |
383 | nd = (struct nd_msg *)skb_transport_header(skb); | |
384 | key->ipv6.nd.target = nd->target; | |
ccb1352e JG |
385 | |
386 | icmp_len -= sizeof(*nd); | |
387 | offset = 0; | |
388 | while (icmp_len >= 8) { | |
389 | struct nd_opt_hdr *nd_opt = | |
390 | (struct nd_opt_hdr *)(nd->opt + offset); | |
391 | int opt_len = nd_opt->nd_opt_len * 8; | |
392 | ||
393 | if (unlikely(!opt_len || opt_len > icmp_len)) | |
03f0d916 | 394 | return 0; |
ccb1352e JG |
395 | |
396 | /* Store the link layer address if the appropriate | |
397 | * option is provided. It is considered an error if | |
398 | * the same link layer option is specified twice. | |
399 | */ | |
400 | if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LL_ADDR | |
401 | && opt_len == 8) { | |
402 | if (unlikely(!is_zero_ether_addr(key->ipv6.nd.sll))) | |
403 | goto invalid; | |
8c63ff09 JP |
404 | ether_addr_copy(key->ipv6.nd.sll, |
405 | &nd->opt[offset+sizeof(*nd_opt)]); | |
ccb1352e JG |
406 | } else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LL_ADDR |
407 | && opt_len == 8) { | |
408 | if (unlikely(!is_zero_ether_addr(key->ipv6.nd.tll))) | |
409 | goto invalid; | |
8c63ff09 JP |
410 | ether_addr_copy(key->ipv6.nd.tll, |
411 | &nd->opt[offset+sizeof(*nd_opt)]); | |
ccb1352e JG |
412 | } |
413 | ||
414 | icmp_len -= opt_len; | |
415 | offset += opt_len; | |
416 | } | |
417 | } | |
418 | ||
03f0d916 | 419 | return 0; |
ccb1352e JG |
420 | |
421 | invalid: | |
422 | memset(&key->ipv6.nd.target, 0, sizeof(key->ipv6.nd.target)); | |
423 | memset(key->ipv6.nd.sll, 0, sizeof(key->ipv6.nd.sll)); | |
424 | memset(key->ipv6.nd.tll, 0, sizeof(key->ipv6.nd.tll)); | |
425 | ||
03f0d916 | 426 | return 0; |
ccb1352e JG |
427 | } |
428 | ||
429 | /** | |
83c8df26 | 430 | * key_extract - extracts a flow key from an Ethernet frame. |
ccb1352e JG |
431 | * @skb: sk_buff that contains the frame, with skb->data pointing to the |
432 | * Ethernet header | |
ccb1352e | 433 | * @key: output flow key |
ccb1352e JG |
434 | * |
435 | * The caller must ensure that skb->len >= ETH_HLEN. | |
436 | * | |
437 | * Returns 0 if successful, otherwise a negative errno value. | |
438 | * | |
439 | * Initializes @skb header pointers as follows: | |
440 | * | |
441 | * - skb->mac_header: the Ethernet header. | |
442 | * | |
443 | * - skb->network_header: just past the Ethernet header, or just past the | |
444 | * VLAN header, to the first byte of the Ethernet payload. | |
445 | * | |
34d94f21 | 446 | * - skb->transport_header: If key->eth.type is ETH_P_IP or ETH_P_IPV6 |
ccb1352e JG |
447 | * on output, then just past the IP header, if one is present and |
448 | * of a correct length, otherwise the same as skb->network_header. | |
34d94f21 | 449 | * For other key->eth.type values it is left untouched. |
ccb1352e | 450 | */ |
83c8df26 | 451 | static int key_extract(struct sk_buff *skb, struct sw_flow_key *key) |
ccb1352e | 452 | { |
03f0d916 | 453 | int error; |
ccb1352e JG |
454 | struct ethhdr *eth; |
455 | ||
f5796684 JG |
456 | /* Flags are always used as part of stats */ |
457 | key->tp.flags = 0; | |
458 | ||
ccb1352e JG |
459 | skb_reset_mac_header(skb); |
460 | ||
461 | /* Link layer. We are guaranteed to have at least the 14 byte Ethernet | |
462 | * header in the linear data area. | |
463 | */ | |
464 | eth = eth_hdr(skb); | |
8c63ff09 JP |
465 | ether_addr_copy(key->eth.src, eth->h_source); |
466 | ether_addr_copy(key->eth.dst, eth->h_dest); | |
ccb1352e JG |
467 | |
468 | __skb_pull(skb, 2 * ETH_ALEN); | |
b34df5e8 PS |
469 | /* We are going to push all headers that we pull, so no need to |
470 | * update skb->csum here. | |
471 | */ | |
ccb1352e | 472 | |
07148121 | 473 | key->eth.tci = 0; |
ccb1352e JG |
474 | if (vlan_tx_tag_present(skb)) |
475 | key->eth.tci = htons(skb->vlan_tci); | |
476 | else if (eth->h_proto == htons(ETH_P_8021Q)) | |
477 | if (unlikely(parse_vlan(skb, key))) | |
478 | return -ENOMEM; | |
479 | ||
480 | key->eth.type = parse_ethertype(skb); | |
481 | if (unlikely(key->eth.type == htons(0))) | |
482 | return -ENOMEM; | |
483 | ||
484 | skb_reset_network_header(skb); | |
25cd9ba0 | 485 | skb_reset_mac_len(skb); |
ccb1352e JG |
486 | __skb_push(skb, skb->data - skb_mac_header(skb)); |
487 | ||
488 | /* Network layer. */ | |
489 | if (key->eth.type == htons(ETH_P_IP)) { | |
490 | struct iphdr *nh; | |
491 | __be16 offset; | |
492 | ||
ccb1352e JG |
493 | error = check_iphdr(skb); |
494 | if (unlikely(error)) { | |
07148121 JG |
495 | memset(&key->ip, 0, sizeof(key->ip)); |
496 | memset(&key->ipv4, 0, sizeof(key->ipv4)); | |
ccb1352e JG |
497 | if (error == -EINVAL) { |
498 | skb->transport_header = skb->network_header; | |
499 | error = 0; | |
500 | } | |
03f0d916 | 501 | return error; |
ccb1352e JG |
502 | } |
503 | ||
504 | nh = ip_hdr(skb); | |
505 | key->ipv4.addr.src = nh->saddr; | |
506 | key->ipv4.addr.dst = nh->daddr; | |
507 | ||
508 | key->ip.proto = nh->protocol; | |
509 | key->ip.tos = nh->tos; | |
510 | key->ip.ttl = nh->ttl; | |
511 | ||
512 | offset = nh->frag_off & htons(IP_OFFSET); | |
513 | if (offset) { | |
514 | key->ip.frag = OVS_FRAG_TYPE_LATER; | |
03f0d916 | 515 | return 0; |
ccb1352e JG |
516 | } |
517 | if (nh->frag_off & htons(IP_MF) || | |
07148121 | 518 | skb_shinfo(skb)->gso_type & SKB_GSO_UDP) |
ccb1352e | 519 | key->ip.frag = OVS_FRAG_TYPE_FIRST; |
07148121 JG |
520 | else |
521 | key->ip.frag = OVS_FRAG_TYPE_NONE; | |
ccb1352e JG |
522 | |
523 | /* Transport layer. */ | |
524 | if (key->ip.proto == IPPROTO_TCP) { | |
ccb1352e JG |
525 | if (tcphdr_ok(skb)) { |
526 | struct tcphdr *tcp = tcp_hdr(skb); | |
1139e241 JR |
527 | key->tp.src = tcp->source; |
528 | key->tp.dst = tcp->dest; | |
529 | key->tp.flags = TCP_FLAGS_BE16(tcp); | |
07148121 JG |
530 | } else { |
531 | memset(&key->tp, 0, sizeof(key->tp)); | |
ccb1352e | 532 | } |
07148121 | 533 | |
ccb1352e | 534 | } else if (key->ip.proto == IPPROTO_UDP) { |
ccb1352e JG |
535 | if (udphdr_ok(skb)) { |
536 | struct udphdr *udp = udp_hdr(skb); | |
1139e241 JR |
537 | key->tp.src = udp->source; |
538 | key->tp.dst = udp->dest; | |
07148121 JG |
539 | } else { |
540 | memset(&key->tp, 0, sizeof(key->tp)); | |
ccb1352e | 541 | } |
a175a723 JS |
542 | } else if (key->ip.proto == IPPROTO_SCTP) { |
543 | if (sctphdr_ok(skb)) { | |
544 | struct sctphdr *sctp = sctp_hdr(skb); | |
1139e241 JR |
545 | key->tp.src = sctp->source; |
546 | key->tp.dst = sctp->dest; | |
07148121 JG |
547 | } else { |
548 | memset(&key->tp, 0, sizeof(key->tp)); | |
a175a723 | 549 | } |
ccb1352e | 550 | } else if (key->ip.proto == IPPROTO_ICMP) { |
ccb1352e JG |
551 | if (icmphdr_ok(skb)) { |
552 | struct icmphdr *icmp = icmp_hdr(skb); | |
553 | /* The ICMP type and code fields use the 16-bit | |
554 | * transport port fields, so we need to store | |
555 | * them in 16-bit network byte order. */ | |
1139e241 JR |
556 | key->tp.src = htons(icmp->type); |
557 | key->tp.dst = htons(icmp->code); | |
07148121 JG |
558 | } else { |
559 | memset(&key->tp, 0, sizeof(key->tp)); | |
ccb1352e JG |
560 | } |
561 | } | |
562 | ||
07148121 JG |
563 | } else if (key->eth.type == htons(ETH_P_ARP) || |
564 | key->eth.type == htons(ETH_P_RARP)) { | |
ccb1352e | 565 | struct arp_eth_header *arp; |
389f4894 | 566 | bool arp_available = arphdr_ok(skb); |
ccb1352e JG |
567 | |
568 | arp = (struct arp_eth_header *)skb_network_header(skb); | |
569 | ||
389f4894 | 570 | if (arp_available && |
07148121 JG |
571 | arp->ar_hrd == htons(ARPHRD_ETHER) && |
572 | arp->ar_pro == htons(ETH_P_IP) && | |
573 | arp->ar_hln == ETH_ALEN && | |
574 | arp->ar_pln == 4) { | |
ccb1352e JG |
575 | |
576 | /* We only match on the lower 8 bits of the opcode. */ | |
577 | if (ntohs(arp->ar_op) <= 0xff) | |
578 | key->ip.proto = ntohs(arp->ar_op); | |
07148121 JG |
579 | else |
580 | key->ip.proto = 0; | |
581 | ||
d04d3829 MM |
582 | memcpy(&key->ipv4.addr.src, arp->ar_sip, sizeof(key->ipv4.addr.src)); |
583 | memcpy(&key->ipv4.addr.dst, arp->ar_tip, sizeof(key->ipv4.addr.dst)); | |
8c63ff09 JP |
584 | ether_addr_copy(key->ipv4.arp.sha, arp->ar_sha); |
585 | ether_addr_copy(key->ipv4.arp.tha, arp->ar_tha); | |
07148121 JG |
586 | } else { |
587 | memset(&key->ip, 0, sizeof(key->ip)); | |
588 | memset(&key->ipv4, 0, sizeof(key->ipv4)); | |
ccb1352e | 589 | } |
25cd9ba0 SH |
590 | } else if (eth_p_mpls(key->eth.type)) { |
591 | size_t stack_len = MPLS_HLEN; | |
592 | ||
593 | /* In the presence of an MPLS label stack the end of the L2 | |
594 | * header and the beginning of the L3 header differ. | |
595 | * | |
596 | * Advance network_header to the beginning of the L3 | |
597 | * header. mac_len corresponds to the end of the L2 header. | |
598 | */ | |
599 | while (1) { | |
600 | __be32 lse; | |
601 | ||
602 | error = check_header(skb, skb->mac_len + stack_len); | |
603 | if (unlikely(error)) | |
604 | return 0; | |
605 | ||
606 | memcpy(&lse, skb_network_header(skb), MPLS_HLEN); | |
607 | ||
608 | if (stack_len == MPLS_HLEN) | |
609 | memcpy(&key->mpls.top_lse, &lse, MPLS_HLEN); | |
610 | ||
611 | skb_set_network_header(skb, skb->mac_len + stack_len); | |
612 | if (lse & htonl(MPLS_LS_S_MASK)) | |
613 | break; | |
614 | ||
615 | stack_len += MPLS_HLEN; | |
616 | } | |
ccb1352e JG |
617 | } else if (key->eth.type == htons(ETH_P_IPV6)) { |
618 | int nh_len; /* IPv6 Header + Extensions */ | |
619 | ||
03f0d916 | 620 | nh_len = parse_ipv6hdr(skb, key); |
ccb1352e | 621 | if (unlikely(nh_len < 0)) { |
07148121 JG |
622 | memset(&key->ip, 0, sizeof(key->ip)); |
623 | memset(&key->ipv6.addr, 0, sizeof(key->ipv6.addr)); | |
03f0d916 | 624 | if (nh_len == -EINVAL) { |
ccb1352e | 625 | skb->transport_header = skb->network_header; |
03f0d916 AZ |
626 | error = 0; |
627 | } else { | |
ccb1352e | 628 | error = nh_len; |
03f0d916 AZ |
629 | } |
630 | return error; | |
ccb1352e JG |
631 | } |
632 | ||
633 | if (key->ip.frag == OVS_FRAG_TYPE_LATER) | |
03f0d916 | 634 | return 0; |
ccb1352e JG |
635 | if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP) |
636 | key->ip.frag = OVS_FRAG_TYPE_FIRST; | |
637 | ||
638 | /* Transport layer. */ | |
639 | if (key->ip.proto == NEXTHDR_TCP) { | |
ccb1352e JG |
640 | if (tcphdr_ok(skb)) { |
641 | struct tcphdr *tcp = tcp_hdr(skb); | |
1139e241 JR |
642 | key->tp.src = tcp->source; |
643 | key->tp.dst = tcp->dest; | |
644 | key->tp.flags = TCP_FLAGS_BE16(tcp); | |
07148121 JG |
645 | } else { |
646 | memset(&key->tp, 0, sizeof(key->tp)); | |
ccb1352e JG |
647 | } |
648 | } else if (key->ip.proto == NEXTHDR_UDP) { | |
ccb1352e JG |
649 | if (udphdr_ok(skb)) { |
650 | struct udphdr *udp = udp_hdr(skb); | |
1139e241 JR |
651 | key->tp.src = udp->source; |
652 | key->tp.dst = udp->dest; | |
07148121 JG |
653 | } else { |
654 | memset(&key->tp, 0, sizeof(key->tp)); | |
ccb1352e | 655 | } |
a175a723 JS |
656 | } else if (key->ip.proto == NEXTHDR_SCTP) { |
657 | if (sctphdr_ok(skb)) { | |
658 | struct sctphdr *sctp = sctp_hdr(skb); | |
1139e241 JR |
659 | key->tp.src = sctp->source; |
660 | key->tp.dst = sctp->dest; | |
07148121 JG |
661 | } else { |
662 | memset(&key->tp, 0, sizeof(key->tp)); | |
a175a723 | 663 | } |
ccb1352e | 664 | } else if (key->ip.proto == NEXTHDR_ICMP) { |
ccb1352e | 665 | if (icmp6hdr_ok(skb)) { |
03f0d916 AZ |
666 | error = parse_icmpv6(skb, key, nh_len); |
667 | if (error) | |
668 | return error; | |
07148121 JG |
669 | } else { |
670 | memset(&key->tp, 0, sizeof(key->tp)); | |
ccb1352e JG |
671 | } |
672 | } | |
673 | } | |
03f0d916 | 674 | return 0; |
ccb1352e | 675 | } |
83c8df26 | 676 | |
971427f3 AZ |
677 | int ovs_flow_key_update(struct sk_buff *skb, struct sw_flow_key *key) |
678 | { | |
679 | return key_extract(skb, key); | |
680 | } | |
681 | ||
12eb18f7 | 682 | int ovs_flow_key_extract(const struct ovs_tunnel_info *tun_info, |
8c8b1b83 | 683 | struct sk_buff *skb, struct sw_flow_key *key) |
83c8df26 PS |
684 | { |
685 | /* Extract metadata from packet. */ | |
f5796684 | 686 | if (tun_info) { |
f0b128c1 | 687 | memcpy(&key->tun_key, &tun_info->tunnel, sizeof(key->tun_key)); |
f5796684 JG |
688 | |
689 | if (tun_info->options) { | |
690 | BUILD_BUG_ON((1 << (sizeof(tun_info->options_len) * | |
691 | 8)) - 1 | |
692 | > sizeof(key->tun_opts)); | |
693 | memcpy(GENEVE_OPTS(key, tun_info->options_len), | |
694 | tun_info->options, tun_info->options_len); | |
695 | key->tun_opts_len = tun_info->options_len; | |
696 | } else { | |
697 | key->tun_opts_len = 0; | |
698 | } | |
699 | } else { | |
700 | key->tun_opts_len = 0; | |
07148121 | 701 | memset(&key->tun_key, 0, sizeof(key->tun_key)); |
f5796684 | 702 | } |
83c8df26 PS |
703 | |
704 | key->phy.priority = skb->priority; | |
705 | key->phy.in_port = OVS_CB(skb)->input_vport->port_no; | |
706 | key->phy.skb_mark = skb->mark; | |
07148121 JG |
707 | key->ovs_flow_hash = 0; |
708 | key->recirc_id = 0; | |
709 | ||
83c8df26 PS |
710 | return key_extract(skb, key); |
711 | } | |
712 | ||
713 | int ovs_flow_key_extract_userspace(const struct nlattr *attr, | |
714 | struct sk_buff *skb, | |
05da5898 | 715 | struct sw_flow_key *key, bool log) |
83c8df26 PS |
716 | { |
717 | int err; | |
718 | ||
83c8df26 | 719 | /* Extract metadata from netlink attributes. */ |
05da5898 | 720 | err = ovs_nla_get_flow_metadata(attr, key, log); |
83c8df26 PS |
721 | if (err) |
722 | return err; | |
723 | ||
724 | return key_extract(skb, key); | |
725 | } |