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Commit | Line | Data |
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064af421 | 1 | /* |
4029c043 | 2 | * Copyright (c) 2007-2014 Nicira, Inc. |
a14bc59f | 3 | * |
a9a29d22 JG |
4 | * This program is free software; you can redistribute it and/or |
5 | * modify it under the terms of version 2 of the GNU General Public | |
6 | * License as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
16 | * 02110-1301, USA | |
064af421 BP |
17 | */ |
18 | ||
6455100f | 19 | #include <linux/uaccess.h> |
064af421 BP |
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> | |
8d5ebd83 | 26 | #include <linux/jhash.h> |
064af421 BP |
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> | |
a26ef517 | 32 | #include <linux/if_arp.h> |
064af421 | 33 | #include <linux/ip.h> |
d31f1109 | 34 | #include <linux/ipv6.h> |
10f72e3d | 35 | #include <linux/sctp.h> |
b0b906cc | 36 | #include <linux/smp.h> |
064af421 BP |
37 | #include <linux/tcp.h> |
38 | #include <linux/udp.h> | |
39 | #include <linux/icmp.h> | |
d31f1109 | 40 | #include <linux/icmpv6.h> |
3544358a | 41 | #include <linux/rculist.h> |
064af421 | 42 | #include <net/ip.h> |
d31f1109 | 43 | #include <net/ipv6.h> |
685a51a5 | 44 | #include <net/ndisc.h> |
064af421 | 45 | |
c135bba1 PS |
46 | #include "datapath.h" |
47 | #include "flow.h" | |
48 | #include "flow_netlink.h" | |
49 | ||
ccf43786 | 50 | #include "mpls.h" |
6ce39213 JG |
51 | #include "vlan.h" |
52 | ||
a097c0b2 | 53 | u64 ovs_flow_used_time(unsigned long flow_jiffies) |
a1c564be | 54 | { |
a097c0b2 PS |
55 | struct timespec cur_ts; |
56 | u64 cur_ms, idle_ms; | |
a1c564be | 57 | |
a097c0b2 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; | |
a1c564be | 62 | |
a097c0b2 | 63 | return cur_ms - idle_ms; |
c2dd5e99 AZ |
64 | } |
65 | ||
a66733a8 | 66 | #define TCP_FLAGS_BE16(tp) (*(__be16 *)&tcp_flag_word(tp) & htons(0x0FFF)) |
a1c564be | 67 | |
a5b8d49b BP |
68 | void ovs_flow_stats_update(struct sw_flow *flow, __be16 tcp_flags, |
69 | struct sk_buff *skb) | |
a1c564be | 70 | { |
b0f3a2fe | 71 | struct flow_stats *stats; |
9ac56358 | 72 | int node = numa_node_id(); |
a1c564be | 73 | |
9ac56358 | 74 | stats = rcu_dereference(flow->stats[node]); |
b0f3a2fe | 75 | |
9ac56358 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) | |
bc36fcd3 | 96 | && likely(!rcu_access_pointer(flow->stats[node]))) { |
9ac56358 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 | ||
b0b906cc PS |
121 | stats->used = jiffies; |
122 | stats->packet_count++; | |
123 | stats->byte_count += skb->len; | |
124 | stats->tcp_flags |= tcp_flags; | |
9ac56358 | 125 | unlock: |
b0b906cc PS |
126 | spin_unlock(&stats->lock); |
127 | } | |
128 | ||
4bb90bea 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, | |
b0f3a2fe PS |
132 | unsigned long *used, __be16 *tcp_flags) |
133 | { | |
9ac56358 | 134 | int node; |
b0b906cc | 135 | |
b0f3a2fe PS |
136 | *used = 0; |
137 | *tcp_flags = 0; | |
138 | memset(ovs_stats, 0, sizeof(*ovs_stats)); | |
b0b906cc | 139 | |
9ac56358 | 140 | for_each_node(node) { |
4bb90bea | 141 | struct flow_stats *stats = rcu_dereference_ovsl(flow->stats[node]); |
9ac56358 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); | |
4029c043 | 148 | if (!*used || time_after(stats->used, *used)) |
9ac56358 JR |
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 | } | |
b0b906cc | 155 | } |
b0b906cc PS |
156 | } |
157 | ||
4bb90bea | 158 | /* Called with ovs_mutex. */ |
b0b906cc PS |
159 | void ovs_flow_stats_clear(struct sw_flow *flow) |
160 | { | |
9ac56358 JR |
161 | int node; |
162 | ||
163 | for_each_node(node) { | |
4bb90bea | 164 | struct flow_stats *stats = ovsl_dereference(flow->stats[node]); |
9ac56358 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 | } | |
b0b906cc | 174 | } |
a1c564be AZ |
175 | } |
176 | ||
2db65bf7 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 | ||
6455100f | 186 | static bool arphdr_ok(struct sk_buff *skb) |
a26ef517 | 187 | { |
2db65bf7 JG |
188 | return pskb_may_pull(skb, skb_network_offset(skb) + |
189 | sizeof(struct arp_eth_header)); | |
a26ef517 JP |
190 | } |
191 | ||
6455100f | 192 | static int check_iphdr(struct sk_buff *skb) |
064af421 | 193 | { |
4c1ad233 BP |
194 | unsigned int nh_ofs = skb_network_offset(skb); |
195 | unsigned int ip_len; | |
2db65bf7 | 196 | int err; |
4c1ad233 | 197 | |
2db65bf7 JG |
198 | err = check_header(skb, nh_ofs + sizeof(struct iphdr)); |
199 | if (unlikely(err)) | |
200 | return err; | |
4c1ad233 BP |
201 | |
202 | ip_len = ip_hdrlen(skb); | |
2db65bf7 JG |
203 | if (unlikely(ip_len < sizeof(struct iphdr) || |
204 | skb->len < nh_ofs + ip_len)) | |
4c1ad233 BP |
205 | return -EINVAL; |
206 | ||
4c1ad233 BP |
207 | skb_set_transport_header(skb, nh_ofs + ip_len); |
208 | return 0; | |
064af421 BP |
209 | } |
210 | ||
6455100f | 211 | static bool tcphdr_ok(struct sk_buff *skb) |
064af421 BP |
212 | { |
213 | int th_ofs = skb_transport_offset(skb); | |
2db65bf7 JG |
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; | |
064af421 BP |
225 | } |
226 | ||
6455100f | 227 | static bool udphdr_ok(struct sk_buff *skb) |
064af421 | 228 | { |
2db65bf7 JG |
229 | return pskb_may_pull(skb, skb_transport_offset(skb) + |
230 | sizeof(struct udphdr)); | |
064af421 BP |
231 | } |
232 | ||
10f72e3d 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 | ||
6455100f | 239 | static bool icmphdr_ok(struct sk_buff *skb) |
064af421 | 240 | { |
2db65bf7 JG |
241 | return pskb_may_pull(skb, skb_transport_offset(skb) + |
242 | sizeof(struct icmphdr)); | |
064af421 BP |
243 | } |
244 | ||
a1c564be | 245 | static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key) |
d31f1109 JP |
246 | { |
247 | unsigned int nh_ofs = skb_network_offset(skb); | |
248 | unsigned int nh_len; | |
249 | int payload_ofs; | |
d31f1109 JP |
250 | struct ipv6hdr *nh; |
251 | uint8_t nexthdr; | |
0fd0d083 | 252 | __be16 frag_off; |
2db65bf7 | 253 | int err; |
d31f1109 | 254 | |
2db65bf7 JG |
255 | err = check_header(skb, nh_ofs + sizeof(*nh)); |
256 | if (unlikely(err)) | |
257 | return err; | |
d31f1109 JP |
258 | |
259 | nh = ipv6_hdr(skb); | |
260 | nexthdr = nh->nexthdr; | |
261 | payload_ofs = (u8 *)(nh + 1) - skb->data; | |
d31f1109 | 262 | |
28bad473 | 263 | key->ip.proto = NEXTHDR_NONE; |
530180fd | 264 | key->ip.tos = ipv6_get_dsfield(nh); |
a61680c6 | 265 | key->ip.ttl = nh->hop_limit; |
fa8223b7 | 266 | key->ipv6.label = *(__be32 *)nh & htonl(IPV6_FLOWINFO_FLOWLABEL); |
858d1026 JG |
267 | key->ipv6.addr.src = nh->saddr; |
268 | key->ipv6.addr.dst = nh->daddr; | |
d31f1109 | 269 | |
0fd0d083 | 270 | payload_ofs = ipv6_skip_exthdr(skb, payload_ofs, &nexthdr, &frag_off); |
bfef4717 | 271 | if (unlikely(payload_ofs < 0)) |
d31f1109 | 272 | return -EINVAL; |
bfef4717 | 273 | |
0fd0d083 JG |
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; | |
9cef26ac JG |
279 | } else { |
280 | key->ip.frag = OVS_FRAG_TYPE_NONE; | |
0fd0d083 JG |
281 | } |
282 | ||
d31f1109 | 283 | nh_len = payload_ofs - nh_ofs; |
d31f1109 | 284 | skb_set_transport_header(skb, nh_ofs + nh_len); |
28bad473 | 285 | key->ip.proto = nexthdr; |
d31f1109 JP |
286 | return nh_len; |
287 | } | |
288 | ||
289 | static bool icmp6hdr_ok(struct sk_buff *skb) | |
290 | { | |
2db65bf7 JG |
291 | return pskb_may_pull(skb, skb_transport_offset(skb) + |
292 | sizeof(struct icmp6hdr)); | |
d31f1109 | 293 | } |
ec58547a | 294 | |
2db65bf7 | 295 | static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key) |
064af421 | 296 | { |
50f06e16 BP |
297 | struct qtag_prefix { |
298 | __be16 eth_type; /* ETH_P_8021Q */ | |
299 | __be16 tci; | |
300 | }; | |
301 | struct qtag_prefix *qp; | |
302 | ||
8ddc056d BP |
303 | if (unlikely(skb->len < sizeof(struct qtag_prefix) + sizeof(__be16))) |
304 | return 0; | |
305 | ||
2db65bf7 JG |
306 | if (unlikely(!pskb_may_pull(skb, sizeof(struct qtag_prefix) + |
307 | sizeof(__be16)))) | |
308 | return -ENOMEM; | |
50f06e16 BP |
309 | |
310 | qp = (struct qtag_prefix *) skb->data; | |
76abe283 | 311 | key->eth.tci = qp->tci | htons(VLAN_TAG_PRESENT); |
50f06e16 | 312 | __skb_pull(skb, sizeof(struct qtag_prefix)); |
2db65bf7 JG |
313 | |
314 | return 0; | |
50f06e16 BP |
315 | } |
316 | ||
317 | static __be16 parse_ethertype(struct sk_buff *skb) | |
064af421 | 318 | { |
50f06e16 BP |
319 | struct llc_snap_hdr { |
320 | u8 dsap; /* Always 0xAA */ | |
321 | u8 ssap; /* Always 0xAA */ | |
322 | u8 ctrl; | |
323 | u8 oui[3]; | |
8dda8c9b | 324 | __be16 ethertype; |
50f06e16 BP |
325 | }; |
326 | struct llc_snap_hdr *llc; | |
327 | __be16 proto; | |
328 | ||
329 | proto = *(__be16 *) skb->data; | |
330 | __skb_pull(skb, sizeof(__be16)); | |
331 | ||
7cd46155 | 332 | if (ntohs(proto) >= ETH_P_802_3_MIN) |
50f06e16 BP |
333 | return proto; |
334 | ||
2db65bf7 | 335 | if (skb->len < sizeof(struct llc_snap_hdr)) |
36956a7d | 336 | return htons(ETH_P_802_2); |
50f06e16 | 337 | |
2db65bf7 JG |
338 | if (unlikely(!pskb_may_pull(skb, sizeof(struct llc_snap_hdr)))) |
339 | return htons(0); | |
340 | ||
50f06e16 BP |
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) | |
36956a7d | 345 | return htons(ETH_P_802_2); |
50f06e16 BP |
346 | |
347 | __skb_pull(skb, sizeof(struct llc_snap_hdr)); | |
9e69bc5f | 348 | |
7cd46155 | 349 | if (ntohs(llc->ethertype) >= ETH_P_802_3_MIN) |
9e69bc5f RL |
350 | return llc->ethertype; |
351 | ||
352 | return htons(ETH_P_802_2); | |
064af421 BP |
353 | } |
354 | ||
685a51a5 | 355 | static int parse_icmpv6(struct sk_buff *skb, struct sw_flow_key *key, |
a1c564be | 356 | int nh_len) |
685a51a5 | 357 | { |
685a51a5 JP |
358 | struct icmp6hdr *icmp = icmp6_hdr(skb); |
359 | ||
360 | /* The ICMPv6 type and code fields use the 16-bit transport port | |
bfef4717 JG |
361 | * fields, so we need to store them in 16-bit network byte order. |
362 | */ | |
708fb4c5 JR |
363 | key->tp.src = htons(icmp->icmp6_type); |
364 | key->tp.dst = htons(icmp->icmp6_code); | |
9cef26ac | 365 | memset(&key->ipv6.nd, 0, sizeof(key->ipv6.nd)); |
685a51a5 | 366 | |
bfef4717 JG |
367 | if (icmp->icmp6_code == 0 && |
368 | (icmp->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION || | |
369 | icmp->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT)) { | |
e977ba19 | 370 | int icmp_len = skb->len - skb_transport_offset(skb); |
685a51a5 JP |
371 | struct nd_msg *nd; |
372 | int offset; | |
373 | ||
374 | /* In order to process neighbor discovery options, we need the | |
bfef4717 JG |
375 | * entire packet. |
376 | */ | |
377 | if (unlikely(icmp_len < sizeof(*nd))) | |
a1c564be AZ |
378 | return 0; |
379 | ||
380 | if (unlikely(skb_linearize(skb))) | |
381 | return -ENOMEM; | |
685a51a5 JP |
382 | |
383 | nd = (struct nd_msg *)skb_transport_header(skb); | |
858d1026 | 384 | key->ipv6.nd.target = nd->target; |
685a51a5 JP |
385 | |
386 | icmp_len -= sizeof(*nd); | |
387 | offset = 0; | |
388 | while (icmp_len >= 8) { | |
6455100f PS |
389 | struct nd_opt_hdr *nd_opt = |
390 | (struct nd_opt_hdr *)(nd->opt + offset); | |
685a51a5 JP |
391 | int opt_len = nd_opt->nd_opt_len * 8; |
392 | ||
bfef4717 | 393 | if (unlikely(!opt_len || opt_len > icmp_len)) |
a1c564be | 394 | return 0; |
685a51a5 | 395 | |
bfef4717 JG |
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 | */ | |
685a51a5 | 400 | if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LL_ADDR |
bfef4717 | 401 | && opt_len == 8) { |
76abe283 | 402 | if (unlikely(!is_zero_ether_addr(key->ipv6.nd.sll))) |
685a51a5 | 403 | goto invalid; |
982a47ec JP |
404 | ether_addr_copy(key->ipv6.nd.sll, |
405 | &nd->opt[offset+sizeof(*nd_opt)]); | |
685a51a5 | 406 | } else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LL_ADDR |
bfef4717 | 407 | && opt_len == 8) { |
76abe283 | 408 | if (unlikely(!is_zero_ether_addr(key->ipv6.nd.tll))) |
685a51a5 | 409 | goto invalid; |
982a47ec JP |
410 | ether_addr_copy(key->ipv6.nd.tll, |
411 | &nd->opt[offset+sizeof(*nd_opt)]); | |
685a51a5 JP |
412 | } |
413 | ||
414 | icmp_len -= opt_len; | |
415 | offset += opt_len; | |
416 | } | |
417 | } | |
418 | ||
a1c564be | 419 | return 0; |
685a51a5 JP |
420 | |
421 | invalid: | |
76abe283 AE |
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)); | |
685a51a5 | 425 | |
a1c564be | 426 | return 0; |
685a51a5 JP |
427 | } |
428 | ||
a31e0e31 | 429 | /** |
c135bba1 | 430 | * key_extract - extracts a flow key from an Ethernet frame. |
a31e0e31 BP |
431 | * @skb: sk_buff that contains the frame, with skb->data pointing to the |
432 | * Ethernet header | |
a31e0e31 BP |
433 | * @key: output flow key |
434 | * | |
435 | * The caller must ensure that skb->len >= ETH_HLEN. | |
436 | * | |
4c1ad233 BP |
437 | * Returns 0 if successful, otherwise a negative errno value. |
438 | * | |
59a18f80 BP |
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 | * | |
ae9020cf | 446 | * - skb->transport_header: If key->eth.type is ETH_P_IP or ETH_P_IPV6 |
d31f1109 JP |
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. | |
ae9020cf | 449 | * For other key->eth.type values it is left untouched. |
a31e0e31 | 450 | */ |
c135bba1 | 451 | static int key_extract(struct sk_buff *skb, struct sw_flow_key *key) |
064af421 | 452 | { |
a1c564be | 453 | int error; |
064af421 | 454 | struct ethhdr *eth; |
064af421 | 455 | |
9cef26ac JG |
456 | /* Flags are always used as part of stats. */ |
457 | key->tp.flags = 0; | |
064af421 | 458 | |
064af421 | 459 | skb_reset_mac_header(skb); |
064af421 | 460 | |
2db65bf7 JG |
461 | /* Link layer. We are guaranteed to have at least the 14 byte Ethernet |
462 | * header in the linear data area. | |
463 | */ | |
50f06e16 | 464 | eth = eth_hdr(skb); |
982a47ec JP |
465 | ether_addr_copy(key->eth.src, eth->h_source); |
466 | ether_addr_copy(key->eth.dst, eth->h_dest); | |
76abe283 | 467 | |
50f06e16 | 468 | __skb_pull(skb, 2 * ETH_ALEN); |
3cfede14 PS |
469 | /* We are going to push all headers that we pull, so no need to |
470 | * update skb->csum here. */ | |
6ce39213 | 471 | |
9cef26ac | 472 | key->eth.tci = 0; |
6ce39213 | 473 | if (vlan_tx_tag_present(skb)) |
76abe283 | 474 | key->eth.tci = htons(vlan_get_tci(skb)); |
6ce39213 | 475 | else if (eth->h_proto == htons(ETH_P_8021Q)) |
2db65bf7 JG |
476 | if (unlikely(parse_vlan(skb, key))) |
477 | return -ENOMEM; | |
6ce39213 | 478 | |
76abe283 AE |
479 | key->eth.type = parse_ethertype(skb); |
480 | if (unlikely(key->eth.type == htons(0))) | |
2db65bf7 JG |
481 | return -ENOMEM; |
482 | ||
50f06e16 | 483 | skb_reset_network_header(skb); |
ccf43786 | 484 | skb_reset_mac_len(skb); |
2db65bf7 | 485 | __skb_push(skb, skb->data - skb_mac_header(skb)); |
064af421 BP |
486 | |
487 | /* Network layer. */ | |
76abe283 | 488 | if (key->eth.type == htons(ETH_P_IP)) { |
4c1ad233 | 489 | struct iphdr *nh; |
7257b535 | 490 | __be16 offset; |
76abe283 | 491 | |
4c1ad233 BP |
492 | error = check_iphdr(skb); |
493 | if (unlikely(error)) { | |
9cef26ac JG |
494 | memset(&key->ip, 0, sizeof(key->ip)); |
495 | memset(&key->ipv4, 0, sizeof(key->ipv4)); | |
4c1ad233 BP |
496 | if (error == -EINVAL) { |
497 | skb->transport_header = skb->network_header; | |
76abe283 | 498 | error = 0; |
4c1ad233 | 499 | } |
a1c564be | 500 | return error; |
4c1ad233 BP |
501 | } |
502 | ||
503 | nh = ip_hdr(skb); | |
76abe283 AE |
504 | key->ipv4.addr.src = nh->saddr; |
505 | key->ipv4.addr.dst = nh->daddr; | |
7257b535 | 506 | |
28bad473 | 507 | key->ip.proto = nh->protocol; |
530180fd | 508 | key->ip.tos = nh->tos; |
a61680c6 | 509 | key->ip.ttl = nh->ttl; |
064af421 | 510 | |
7257b535 BP |
511 | offset = nh->frag_off & htons(IP_OFFSET); |
512 | if (offset) { | |
9e44d715 | 513 | key->ip.frag = OVS_FRAG_TYPE_LATER; |
a1c564be | 514 | return 0; |
7257b535 BP |
515 | } |
516 | if (nh->frag_off & htons(IP_MF) || | |
517 | skb_shinfo(skb)->gso_type & SKB_GSO_UDP) | |
9e44d715 | 518 | key->ip.frag = OVS_FRAG_TYPE_FIRST; |
9cef26ac JG |
519 | else |
520 | key->ip.frag = OVS_FRAG_TYPE_NONE; | |
b7a31ec1 | 521 | |
7257b535 | 522 | /* Transport layer. */ |
28bad473 | 523 | if (key->ip.proto == IPPROTO_TCP) { |
7257b535 | 524 | if (tcphdr_ok(skb)) { |
5f4d087c | 525 | struct tcphdr *tcp = tcp_hdr(skb); |
708fb4c5 JR |
526 | key->tp.src = tcp->source; |
527 | key->tp.dst = tcp->dest; | |
528 | key->tp.flags = TCP_FLAGS_BE16(tcp); | |
9cef26ac JG |
529 | } else { |
530 | memset(&key->tp, 0, sizeof(key->tp)); | |
5f4d087c | 531 | } |
28bad473 | 532 | } else if (key->ip.proto == IPPROTO_UDP) { |
7257b535 | 533 | if (udphdr_ok(skb)) { |
5f4d087c | 534 | struct udphdr *udp = udp_hdr(skb); |
708fb4c5 JR |
535 | key->tp.src = udp->source; |
536 | key->tp.dst = udp->dest; | |
9cef26ac JG |
537 | } else { |
538 | memset(&key->tp, 0, sizeof(key->tp)); | |
5f4d087c | 539 | } |
10f72e3d JS |
540 | } else if (key->ip.proto == IPPROTO_SCTP) { |
541 | if (sctphdr_ok(skb)) { | |
542 | struct sctphdr *sctp = sctp_hdr(skb); | |
708fb4c5 JR |
543 | key->tp.src = sctp->source; |
544 | key->tp.dst = sctp->dest; | |
9cef26ac JG |
545 | } else { |
546 | memset(&key->tp, 0, sizeof(key->tp)); | |
10f72e3d | 547 | } |
28bad473 | 548 | } else if (key->ip.proto == IPPROTO_ICMP) { |
7257b535 | 549 | if (icmphdr_ok(skb)) { |
5f4d087c JG |
550 | struct icmphdr *icmp = icmp_hdr(skb); |
551 | /* The ICMP type and code fields use the 16-bit | |
6455100f PS |
552 | * transport port fields, so we need to store |
553 | * them in 16-bit network byte order. */ | |
708fb4c5 JR |
554 | key->tp.src = htons(icmp->type); |
555 | key->tp.dst = htons(icmp->code); | |
9cef26ac JG |
556 | } else { |
557 | memset(&key->tp, 0, sizeof(key->tp)); | |
5f4d087c JG |
558 | } |
559 | } | |
560 | ||
9cef26ac JG |
561 | } else if (key->eth.type == htons(ETH_P_ARP) || |
562 | key->eth.type == htons(ETH_P_RARP)) { | |
a26ef517 JP |
563 | struct arp_eth_header *arp; |
564 | ||
565 | arp = (struct arp_eth_header *)skb_network_header(skb); | |
566 | ||
9cef26ac JG |
567 | if (arphdr_ok(skb) |
568 | && arp->ar_hrd == htons(ARPHRD_ETHER) | |
de3f65ea JP |
569 | && arp->ar_pro == htons(ETH_P_IP) |
570 | && arp->ar_hln == ETH_ALEN | |
571 | && arp->ar_pln == 4) { | |
572 | ||
573 | /* We only match on the lower 8 bits of the opcode. */ | |
b7a31ec1 | 574 | if (ntohs(arp->ar_op) <= 0xff) |
28bad473 | 575 | key->ip.proto = ntohs(arp->ar_op); |
9cef26ac JG |
576 | else |
577 | key->ip.proto = 0; | |
578 | ||
a3d3ad0c MM |
579 | memcpy(&key->ipv4.addr.src, arp->ar_sip, sizeof(key->ipv4.addr.src)); |
580 | memcpy(&key->ipv4.addr.dst, arp->ar_tip, sizeof(key->ipv4.addr.dst)); | |
982a47ec JP |
581 | ether_addr_copy(key->ipv4.arp.sha, arp->ar_sha); |
582 | ether_addr_copy(key->ipv4.arp.tha, arp->ar_tha); | |
9cef26ac JG |
583 | } else { |
584 | memset(&key->ip, 0, sizeof(key->ip)); | |
585 | memset(&key->ipv4, 0, sizeof(key->ipv4)); | |
de3f65ea | 586 | } |
ccf43786 SH |
587 | } else if (eth_p_mpls(key->eth.type)) { |
588 | size_t stack_len = MPLS_HLEN; | |
589 | ||
590 | /* In the presence of an MPLS label stack the end of the L2 | |
591 | * header and the beginning of the L3 header differ. | |
592 | * | |
593 | * Advance network_header to the beginning of the L3 | |
594 | * header. mac_len corresponds to the end of the L2 header. | |
595 | */ | |
596 | while (1) { | |
597 | __be32 lse; | |
598 | ||
599 | error = check_header(skb, skb->mac_len + stack_len); | |
600 | if (unlikely(error)) | |
601 | return 0; | |
602 | ||
603 | memcpy(&lse, skb_network_header(skb), MPLS_HLEN); | |
604 | ||
605 | if (stack_len == MPLS_HLEN) | |
606 | memcpy(&key->mpls.top_lse, &lse, MPLS_HLEN); | |
607 | ||
608 | skb_set_network_header(skb, skb->mac_len + stack_len); | |
609 | if (lse & htonl(MPLS_BOS_MASK)) | |
610 | break; | |
611 | ||
612 | stack_len += MPLS_HLEN; | |
613 | } | |
76abe283 | 614 | } else if (key->eth.type == htons(ETH_P_IPV6)) { |
d31f1109 JP |
615 | int nh_len; /* IPv6 Header + Extensions */ |
616 | ||
a1c564be | 617 | nh_len = parse_ipv6hdr(skb, key); |
d31f1109 | 618 | if (unlikely(nh_len < 0)) { |
9cef26ac JG |
619 | memset(&key->ip, 0, sizeof(key->ip)); |
620 | memset(&key->ipv6.addr, 0, sizeof(key->ipv6.addr)); | |
a1c564be | 621 | if (nh_len == -EINVAL) { |
d31f1109 | 622 | skb->transport_header = skb->network_header; |
a1c564be AZ |
623 | error = 0; |
624 | } else { | |
76abe283 | 625 | error = nh_len; |
a1c564be AZ |
626 | } |
627 | return error; | |
d31f1109 JP |
628 | } |
629 | ||
9e44d715 | 630 | if (key->ip.frag == OVS_FRAG_TYPE_LATER) |
a1c564be | 631 | return 0; |
7257b535 | 632 | if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP) |
9e44d715 | 633 | key->ip.frag = OVS_FRAG_TYPE_FIRST; |
7257b535 | 634 | |
d31f1109 | 635 | /* Transport layer. */ |
28bad473 | 636 | if (key->ip.proto == NEXTHDR_TCP) { |
d31f1109 JP |
637 | if (tcphdr_ok(skb)) { |
638 | struct tcphdr *tcp = tcp_hdr(skb); | |
708fb4c5 JR |
639 | key->tp.src = tcp->source; |
640 | key->tp.dst = tcp->dest; | |
641 | key->tp.flags = TCP_FLAGS_BE16(tcp); | |
9cef26ac JG |
642 | } else { |
643 | memset(&key->tp, 0, sizeof(key->tp)); | |
d31f1109 | 644 | } |
28bad473 | 645 | } else if (key->ip.proto == NEXTHDR_UDP) { |
d31f1109 JP |
646 | if (udphdr_ok(skb)) { |
647 | struct udphdr *udp = udp_hdr(skb); | |
708fb4c5 JR |
648 | key->tp.src = udp->source; |
649 | key->tp.dst = udp->dest; | |
9cef26ac JG |
650 | } else { |
651 | memset(&key->tp, 0, sizeof(key->tp)); | |
d31f1109 | 652 | } |
10f72e3d JS |
653 | } else if (key->ip.proto == NEXTHDR_SCTP) { |
654 | if (sctphdr_ok(skb)) { | |
655 | struct sctphdr *sctp = sctp_hdr(skb); | |
708fb4c5 JR |
656 | key->tp.src = sctp->source; |
657 | key->tp.dst = sctp->dest; | |
9cef26ac JG |
658 | } else { |
659 | memset(&key->tp, 0, sizeof(key->tp)); | |
10f72e3d | 660 | } |
28bad473 | 661 | } else if (key->ip.proto == NEXTHDR_ICMP) { |
d31f1109 | 662 | if (icmp6hdr_ok(skb)) { |
a1c564be AZ |
663 | error = parse_icmpv6(skb, key, nh_len); |
664 | if (error) | |
665 | return error; | |
9cef26ac JG |
666 | } else { |
667 | memset(&key->tp, 0, sizeof(key->tp)); | |
d31f1109 JP |
668 | } |
669 | } | |
064af421 | 670 | } |
76abe283 | 671 | |
a1c564be | 672 | return 0; |
064af421 | 673 | } |
c135bba1 | 674 | |
e0a42ae2 AZ |
675 | int ovs_flow_key_update(struct sk_buff *skb, struct sw_flow_key *key) |
676 | { | |
677 | return key_extract(skb, key); | |
678 | } | |
679 | ||
fb66fbd1 PS |
680 | int ovs_flow_key_extract(const struct ovs_tunnel_info *tun_info, |
681 | struct sk_buff *skb, | |
682 | struct sw_flow_key *key) | |
c135bba1 PS |
683 | { |
684 | /* Extract metadata from packet. */ | |
fb66fbd1 | 685 | if (tun_info) { |
c135bba1 PS |
686 | memcpy(&key->tun_key, &tun_info->tunnel, sizeof(key->tun_key)); |
687 | ||
688 | BUILD_BUG_ON(((1 << (sizeof(tun_info->options_len) * 8)) - 1) > | |
689 | sizeof(key->tun_opts)); | |
690 | ||
691 | if (tun_info->options) { | |
692 | memcpy(GENEVE_OPTS(key, tun_info->options_len), | |
693 | tun_info->options, tun_info->options_len); | |
694 | key->tun_opts_len = tun_info->options_len; | |
695 | } else { | |
696 | key->tun_opts_len = 0; | |
697 | } | |
698 | } else { | |
699 | key->tun_opts_len = 0; | |
700 | memset(&key->tun_key, 0, sizeof(key->tun_key)); | |
701 | } | |
702 | ||
703 | key->phy.priority = skb->priority; | |
704 | key->phy.in_port = OVS_CB(skb)->input_vport->port_no; | |
705 | key->phy.skb_mark = skb->mark; | |
706 | key->ovs_flow_hash = 0; | |
707 | key->recirc_id = 0; | |
708 | ||
709 | return key_extract(skb, key); | |
710 | } | |
711 | ||
712 | int ovs_flow_key_extract_userspace(const struct nlattr *attr, | |
713 | struct sk_buff *skb, | |
714 | struct sw_flow_key *key) | |
715 | { | |
716 | int err; | |
717 | ||
718 | /* Extract metadata from netlink attributes. */ | |
719 | err = ovs_nla_get_flow_metadata(attr, key); | |
720 | if (err) | |
721 | return err; | |
722 | ||
723 | return key_extract(skb, key); | |
724 | } |