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Commit | Line | Data |
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064af421 BP |
1 | /* |
2 | * Distributed under the terms of the GNU GPL version 2. | |
f632c8fc | 3 | * Copyright (c) 2007, 2008, 2009, 2010, 2011 Nicira Networks. |
a14bc59f BP |
4 | * |
5 | * Significant portions of this file may be copied from parts of the Linux | |
6 | * kernel, by Linus Torvalds and others. | |
064af421 BP |
7 | */ |
8 | ||
9 | #include "flow.h" | |
f5e86186 | 10 | #include "datapath.h" |
36956a7d | 11 | #include <asm/uaccess.h> |
064af421 BP |
12 | #include <linux/netdevice.h> |
13 | #include <linux/etherdevice.h> | |
14 | #include <linux/if_ether.h> | |
15 | #include <linux/if_vlan.h> | |
16 | #include <net/llc_pdu.h> | |
17 | #include <linux/kernel.h> | |
8d5ebd83 | 18 | #include <linux/jhash.h> |
064af421 BP |
19 | #include <linux/jiffies.h> |
20 | #include <linux/llc.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/in.h> | |
23 | #include <linux/rcupdate.h> | |
a26ef517 | 24 | #include <linux/if_arp.h> |
064af421 BP |
25 | #include <linux/if_ether.h> |
26 | #include <linux/ip.h> | |
d31f1109 | 27 | #include <linux/ipv6.h> |
064af421 BP |
28 | #include <linux/tcp.h> |
29 | #include <linux/udp.h> | |
30 | #include <linux/icmp.h> | |
d31f1109 | 31 | #include <linux/icmpv6.h> |
3c5f6de3 | 32 | #include <net/inet_ecn.h> |
064af421 | 33 | #include <net/ip.h> |
d31f1109 | 34 | #include <net/ipv6.h> |
685a51a5 | 35 | #include <net/ndisc.h> |
064af421 | 36 | |
33b38b63 | 37 | static struct kmem_cache *flow_cache; |
83e3e75b | 38 | static unsigned int hash_seed __read_mostly; |
064af421 | 39 | |
e819fb47 | 40 | static inline bool arphdr_ok(struct sk_buff *skb) |
a26ef517 | 41 | { |
7d0ab001 | 42 | return skb->len >= skb_network_offset(skb) + sizeof(struct arp_eth_header); |
a26ef517 JP |
43 | } |
44 | ||
4c1ad233 | 45 | static inline int check_iphdr(struct sk_buff *skb) |
064af421 | 46 | { |
4c1ad233 BP |
47 | unsigned int nh_ofs = skb_network_offset(skb); |
48 | unsigned int ip_len; | |
49 | ||
50 | if (skb->len < nh_ofs + sizeof(struct iphdr)) | |
51 | return -EINVAL; | |
52 | ||
53 | ip_len = ip_hdrlen(skb); | |
54 | if (ip_len < sizeof(struct iphdr) || skb->len < nh_ofs + ip_len) | |
55 | return -EINVAL; | |
56 | ||
57 | /* | |
58 | * Pull enough header bytes to account for the IP header plus the | |
59 | * longest transport header that we parse, currently 20 bytes for TCP. | |
60 | */ | |
61 | if (!pskb_may_pull(skb, min(nh_ofs + ip_len + 20, skb->len))) | |
62 | return -ENOMEM; | |
63 | ||
64 | skb_set_transport_header(skb, nh_ofs + ip_len); | |
65 | return 0; | |
064af421 BP |
66 | } |
67 | ||
e819fb47 | 68 | static inline bool tcphdr_ok(struct sk_buff *skb) |
064af421 BP |
69 | { |
70 | int th_ofs = skb_transport_offset(skb); | |
7d0ab001 | 71 | if (skb->len >= th_ofs + sizeof(struct tcphdr)) { |
064af421 BP |
72 | int tcp_len = tcp_hdrlen(skb); |
73 | return (tcp_len >= sizeof(struct tcphdr) | |
74 | && skb->len >= th_ofs + tcp_len); | |
75 | } | |
e819fb47 | 76 | return false; |
064af421 BP |
77 | } |
78 | ||
e819fb47 | 79 | static inline bool udphdr_ok(struct sk_buff *skb) |
064af421 | 80 | { |
7d0ab001 | 81 | return skb->len >= skb_transport_offset(skb) + sizeof(struct udphdr); |
064af421 BP |
82 | } |
83 | ||
e819fb47 | 84 | static inline bool icmphdr_ok(struct sk_buff *skb) |
064af421 | 85 | { |
7d0ab001 | 86 | return skb->len >= skb_transport_offset(skb) + sizeof(struct icmphdr); |
064af421 BP |
87 | } |
88 | ||
ec58547a JG |
89 | u64 flow_used_time(unsigned long flow_jiffies) |
90 | { | |
91 | struct timespec cur_ts; | |
92 | u64 cur_ms, idle_ms; | |
93 | ||
94 | ktime_get_ts(&cur_ts); | |
95 | idle_ms = jiffies_to_msecs(jiffies - flow_jiffies); | |
96 | cur_ms = (u64)cur_ts.tv_sec * MSEC_PER_SEC + | |
97 | cur_ts.tv_nsec / NSEC_PER_MSEC; | |
98 | ||
99 | return cur_ms - idle_ms; | |
100 | } | |
101 | ||
d31f1109 JP |
102 | static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key) |
103 | { | |
104 | unsigned int nh_ofs = skb_network_offset(skb); | |
105 | unsigned int nh_len; | |
106 | int payload_ofs; | |
107 | int payload_len; | |
108 | struct ipv6hdr *nh; | |
109 | uint8_t nexthdr; | |
110 | ||
111 | if (unlikely(skb->len < nh_ofs + sizeof(*nh))) | |
112 | return -EINVAL; | |
113 | ||
114 | nh = ipv6_hdr(skb); | |
115 | nexthdr = nh->nexthdr; | |
116 | payload_ofs = (u8 *)(nh + 1) - skb->data; | |
117 | payload_len = ntohs(nh->payload_len); | |
118 | ||
119 | memcpy(key->ipv6_src, nh->saddr.in6_u.u6_addr8, sizeof(key->ipv6_src)); | |
120 | memcpy(key->ipv6_dst, nh->daddr.in6_u.u6_addr8, sizeof(key->ipv6_dst)); | |
121 | key->nw_tos = ipv6_get_dsfield(nh) & ~INET_ECN_MASK; | |
122 | key->nw_proto = NEXTHDR_NONE; | |
123 | ||
124 | /* We don't process jumbograms. */ | |
125 | if (!payload_len) | |
126 | return -EINVAL; | |
127 | ||
128 | if (unlikely(skb->len < nh_ofs + sizeof(*nh) + payload_len)) | |
129 | return -EINVAL; | |
130 | ||
131 | payload_ofs = ipv6_skip_exthdr(skb, payload_ofs, &nexthdr); | |
132 | if (payload_ofs < 0) { | |
133 | return -EINVAL; | |
134 | } | |
135 | nh_len = payload_ofs - nh_ofs; | |
136 | ||
137 | /* Ensure that the payload length claimed is at least large enough | |
138 | * for the headers we've already processed. */ | |
139 | if (payload_len < nh_len - sizeof(*nh)) | |
140 | return -EINVAL; | |
141 | ||
142 | /* Pull enough header bytes to account for the IP header plus the | |
143 | * longest transport header that we parse, currently 20 bytes for TCP. | |
144 | * To dig deeper than the transport header, transport parsers may need | |
145 | * to pull more header bytes. | |
146 | */ | |
147 | if (unlikely(!pskb_may_pull(skb, min(nh_ofs + nh_len + 20, skb->len)))) | |
148 | return -ENOMEM; | |
149 | ||
150 | skb_set_transport_header(skb, nh_ofs + nh_len); | |
151 | key->nw_proto = nexthdr; | |
152 | return nh_len; | |
153 | } | |
154 | ||
155 | static bool icmp6hdr_ok(struct sk_buff *skb) | |
156 | { | |
157 | return skb->len >= skb_transport_offset(skb) + sizeof(struct icmp6hdr); | |
158 | } | |
ec58547a | 159 | |
064af421 BP |
160 | #define TCP_FLAGS_OFFSET 13 |
161 | #define TCP_FLAG_MASK 0x3f | |
162 | ||
064af421 BP |
163 | void flow_used(struct sw_flow *flow, struct sk_buff *skb) |
164 | { | |
064af421 BP |
165 | u8 tcp_flags = 0; |
166 | ||
abfec865 BP |
167 | if (flow->key.dl_type == htons(ETH_P_IP) && |
168 | flow->key.nw_proto == IPPROTO_TCP) { | |
169 | u8 *tcp = (u8 *)tcp_hdr(skb); | |
170 | tcp_flags = *(tcp + TCP_FLAGS_OFFSET) & TCP_FLAG_MASK; | |
064af421 BP |
171 | } |
172 | ||
f2459fe7 | 173 | spin_lock_bh(&flow->lock); |
6bfafa55 | 174 | flow->used = jiffies; |
064af421 BP |
175 | flow->packet_count++; |
176 | flow->byte_count += skb->len; | |
177 | flow->tcp_flags |= tcp_flags; | |
f2459fe7 | 178 | spin_unlock_bh(&flow->lock); |
064af421 BP |
179 | } |
180 | ||
37a1300c | 181 | struct sw_flow_actions *flow_actions_alloc(const struct nlattr *actions) |
064af421 | 182 | { |
37a1300c | 183 | int actions_len = nla_len(actions); |
064af421 BP |
184 | struct sw_flow_actions *sfa; |
185 | ||
722d19c5 BP |
186 | /* At least DP_MAX_PORTS actions are required to be able to flood a |
187 | * packet to every port. Factor of 2 allows for setting VLAN tags, | |
188 | * etc. */ | |
cdee00fd | 189 | if (actions_len > 2 * DP_MAX_PORTS * nla_total_size(4)) |
064af421 BP |
190 | return ERR_PTR(-EINVAL); |
191 | ||
84c17d98 | 192 | sfa = kmalloc(sizeof(*sfa) + actions_len, GFP_KERNEL); |
064af421 BP |
193 | if (!sfa) |
194 | return ERR_PTR(-ENOMEM); | |
195 | ||
cdee00fd | 196 | sfa->actions_len = actions_len; |
37a1300c | 197 | memcpy(sfa->actions, nla_data(actions), actions_len); |
064af421 BP |
198 | return sfa; |
199 | } | |
200 | ||
560e8022 JG |
201 | struct sw_flow *flow_alloc(void) |
202 | { | |
203 | struct sw_flow *flow; | |
204 | ||
205 | flow = kmem_cache_alloc(flow_cache, GFP_KERNEL); | |
206 | if (!flow) | |
207 | return ERR_PTR(-ENOMEM); | |
208 | ||
209 | spin_lock_init(&flow->lock); | |
fb8c9347 JG |
210 | atomic_set(&flow->refcnt, 1); |
211 | flow->dead = false; | |
064af421 | 212 | |
560e8022 JG |
213 | return flow; |
214 | } | |
215 | ||
8d5ebd83 JG |
216 | void flow_free_tbl(struct tbl_node *node) |
217 | { | |
218 | struct sw_flow *flow = flow_cast(node); | |
fb8c9347 JG |
219 | |
220 | flow->dead = true; | |
221 | flow_put(flow); | |
8d5ebd83 JG |
222 | } |
223 | ||
064af421 BP |
224 | /* RCU callback used by flow_deferred_free. */ |
225 | static void rcu_free_flow_callback(struct rcu_head *rcu) | |
226 | { | |
227 | struct sw_flow *flow = container_of(rcu, struct sw_flow, rcu); | |
fb8c9347 JG |
228 | |
229 | flow->dead = true; | |
230 | flow_put(flow); | |
064af421 BP |
231 | } |
232 | ||
233 | /* Schedules 'flow' to be freed after the next RCU grace period. | |
234 | * The caller must hold rcu_read_lock for this to be sensible. */ | |
235 | void flow_deferred_free(struct sw_flow *flow) | |
236 | { | |
237 | call_rcu(&flow->rcu, rcu_free_flow_callback); | |
238 | } | |
239 | ||
fb8c9347 JG |
240 | void flow_hold(struct sw_flow *flow) |
241 | { | |
242 | atomic_inc(&flow->refcnt); | |
243 | } | |
244 | ||
245 | void flow_put(struct sw_flow *flow) | |
246 | { | |
247 | if (unlikely(!flow)) | |
248 | return; | |
249 | ||
250 | if (atomic_dec_and_test(&flow->refcnt)) { | |
39872c70 | 251 | kfree((struct sf_flow_acts __force *)flow->sf_acts); |
fb8c9347 JG |
252 | kmem_cache_free(flow_cache, flow); |
253 | } | |
254 | } | |
255 | ||
064af421 BP |
256 | /* RCU callback used by flow_deferred_free_acts. */ |
257 | static void rcu_free_acts_callback(struct rcu_head *rcu) | |
258 | { | |
d295e8e9 | 259 | struct sw_flow_actions *sf_acts = container_of(rcu, |
064af421 BP |
260 | struct sw_flow_actions, rcu); |
261 | kfree(sf_acts); | |
262 | } | |
263 | ||
264 | /* Schedules 'sf_acts' to be freed after the next RCU grace period. | |
265 | * The caller must hold rcu_read_lock for this to be sensible. */ | |
266 | void flow_deferred_free_acts(struct sw_flow_actions *sf_acts) | |
267 | { | |
268 | call_rcu(&sf_acts->rcu, rcu_free_acts_callback); | |
269 | } | |
270 | ||
36956a7d | 271 | static void parse_vlan(struct sk_buff *skb, struct sw_flow_key *key) |
064af421 | 272 | { |
50f06e16 BP |
273 | struct qtag_prefix { |
274 | __be16 eth_type; /* ETH_P_8021Q */ | |
275 | __be16 tci; | |
276 | }; | |
277 | struct qtag_prefix *qp; | |
278 | ||
279 | if (skb->len < sizeof(struct qtag_prefix) + sizeof(__be16)) | |
280 | return; | |
281 | ||
282 | qp = (struct qtag_prefix *) skb->data; | |
36956a7d | 283 | key->dl_tci = qp->tci | htons(VLAN_TAG_PRESENT); |
50f06e16 BP |
284 | __skb_pull(skb, sizeof(struct qtag_prefix)); |
285 | } | |
286 | ||
287 | static __be16 parse_ethertype(struct sk_buff *skb) | |
064af421 | 288 | { |
50f06e16 BP |
289 | struct llc_snap_hdr { |
290 | u8 dsap; /* Always 0xAA */ | |
291 | u8 ssap; /* Always 0xAA */ | |
292 | u8 ctrl; | |
293 | u8 oui[3]; | |
8dda8c9b | 294 | __be16 ethertype; |
50f06e16 BP |
295 | }; |
296 | struct llc_snap_hdr *llc; | |
297 | __be16 proto; | |
298 | ||
299 | proto = *(__be16 *) skb->data; | |
300 | __skb_pull(skb, sizeof(__be16)); | |
301 | ||
36956a7d | 302 | if (ntohs(proto) >= 1536) |
50f06e16 BP |
303 | return proto; |
304 | ||
305 | if (unlikely(skb->len < sizeof(struct llc_snap_hdr))) | |
36956a7d | 306 | return htons(ETH_P_802_2); |
50f06e16 BP |
307 | |
308 | llc = (struct llc_snap_hdr *) skb->data; | |
309 | if (llc->dsap != LLC_SAP_SNAP || | |
310 | llc->ssap != LLC_SAP_SNAP || | |
311 | (llc->oui[0] | llc->oui[1] | llc->oui[2]) != 0) | |
36956a7d | 312 | return htons(ETH_P_802_2); |
50f06e16 BP |
313 | |
314 | __skb_pull(skb, sizeof(struct llc_snap_hdr)); | |
315 | return llc->ethertype; | |
064af421 BP |
316 | } |
317 | ||
685a51a5 JP |
318 | static int parse_icmpv6(struct sk_buff *skb, struct sw_flow_key *key, |
319 | int nh_len) | |
320 | { | |
321 | struct ipv6hdr *nh = ipv6_hdr(skb); | |
322 | int icmp_len = ntohs(nh->payload_len) + sizeof(*nh) - nh_len; | |
323 | struct icmp6hdr *icmp = icmp6_hdr(skb); | |
324 | ||
325 | /* The ICMPv6 type and code fields use the 16-bit transport port | |
326 | * fields, so we need to store them in 16-bit network byte order. */ | |
327 | key->tp_src = htons(icmp->icmp6_type); | |
328 | key->tp_dst = htons(icmp->icmp6_code); | |
329 | ||
330 | if (!icmp->icmp6_code | |
331 | && ((icmp->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) | |
332 | || (icmp->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT))) { | |
333 | struct nd_msg *nd; | |
334 | int offset; | |
335 | ||
336 | /* In order to process neighbor discovery options, we need the | |
337 | * entire packet. */ | |
338 | if (icmp_len < sizeof(*nd)) | |
339 | goto invalid; | |
340 | if (!pskb_may_pull(skb, skb_transport_offset(skb) + icmp_len)) | |
341 | return -ENOMEM; | |
342 | ||
343 | nd = (struct nd_msg *)skb_transport_header(skb); | |
344 | memcpy(key->nd_target, &nd->target, sizeof(key->nd_target)); | |
345 | ||
346 | icmp_len -= sizeof(*nd); | |
347 | offset = 0; | |
348 | while (icmp_len >= 8) { | |
349 | struct nd_opt_hdr *nd_opt = (struct nd_opt_hdr *)(nd->opt + offset); | |
350 | int opt_len = nd_opt->nd_opt_len * 8; | |
351 | ||
352 | if (!opt_len || (opt_len > icmp_len)) | |
353 | goto invalid; | |
354 | ||
355 | /* Store the link layer address if the appropriate option is | |
356 | * provided. It is considered an error if the same link | |
357 | * layer option is specified twice. */ | |
358 | if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LL_ADDR | |
359 | && opt_len == 8) { | |
360 | if (!is_zero_ether_addr(key->arp_sha)) | |
361 | goto invalid; | |
362 | memcpy(key->arp_sha, | |
363 | &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN); | |
364 | } else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LL_ADDR | |
365 | && opt_len == 8) { | |
366 | if (!is_zero_ether_addr(key->arp_tha)) | |
367 | goto invalid; | |
368 | memcpy(key->arp_tha, | |
369 | &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN); | |
370 | } | |
371 | ||
372 | icmp_len -= opt_len; | |
373 | offset += opt_len; | |
374 | } | |
375 | } | |
376 | ||
377 | return 0; | |
378 | ||
379 | invalid: | |
380 | memset(key->nd_target, 0, sizeof(key->nd_target)); | |
381 | memset(key->arp_sha, 0, sizeof(key->arp_sha)); | |
382 | memset(key->arp_tha, 0, sizeof(key->arp_tha)); | |
383 | ||
384 | return 0; | |
385 | } | |
386 | ||
a31e0e31 BP |
387 | /** |
388 | * flow_extract - extracts a flow key from an Ethernet frame. | |
389 | * @skb: sk_buff that contains the frame, with skb->data pointing to the | |
390 | * Ethernet header | |
391 | * @in_port: port number on which @skb was received. | |
392 | * @key: output flow key | |
26233bb4 BP |
393 | * @is_frag: set to 1 if @skb contains an IPv4 fragment, or to 0 if @skb does |
394 | * not contain an IPv4 packet or if it is not a fragment. | |
a31e0e31 BP |
395 | * |
396 | * The caller must ensure that skb->len >= ETH_HLEN. | |
397 | * | |
4c1ad233 BP |
398 | * Returns 0 if successful, otherwise a negative errno value. |
399 | * | |
59a18f80 BP |
400 | * Initializes @skb header pointers as follows: |
401 | * | |
402 | * - skb->mac_header: the Ethernet header. | |
403 | * | |
404 | * - skb->network_header: just past the Ethernet header, or just past the | |
405 | * VLAN header, to the first byte of the Ethernet payload. | |
406 | * | |
d31f1109 JP |
407 | * - skb->transport_header: If key->dl_type is ETH_P_IP or ETH_P_IPV6 |
408 | * on output, then just past the IP header, if one is present and | |
409 | * of a correct length, otherwise the same as skb->network_header. | |
410 | * For other key->dl_type values it is left untouched. | |
a31e0e31 | 411 | */ |
36956a7d | 412 | int flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key, |
b7a31ec1 | 413 | bool *is_frag) |
064af421 BP |
414 | { |
415 | struct ethhdr *eth; | |
064af421 | 416 | |
84c17d98 | 417 | memset(key, 0, sizeof(*key)); |
659586ef | 418 | key->tun_id = OVS_CB(skb)->tun_id; |
064af421 | 419 | key->in_port = in_port; |
b7a31ec1 | 420 | *is_frag = false; |
064af421 | 421 | |
4c1ad233 BP |
422 | /* |
423 | * We would really like to pull as many bytes as we could possibly | |
d31f1109 JP |
424 | * want to parse into the linear data area. Currently, for IPv4, |
425 | * that is: | |
4c1ad233 BP |
426 | * |
427 | * 14 Ethernet header | |
428 | * 4 VLAN header | |
429 | * 60 max IP header with options | |
430 | * 20 max TCP/UDP/ICMP header (don't care about options) | |
431 | * -- | |
432 | * 98 | |
433 | * | |
434 | * But Xen only allocates 64 or 72 bytes for the linear data area in | |
435 | * netback, which means that we would reallocate and copy the skb's | |
436 | * linear data on every packet if we did that. So instead just pull 64 | |
437 | * bytes, which is always sufficient without IP options, and then check | |
438 | * whether we need to pull more later when we look at the IP header. | |
439 | */ | |
d9fce1ca | 440 | if (!pskb_may_pull(skb, min(skb->len, 64u))) |
4c1ad233 | 441 | return -ENOMEM; |
064af421 BP |
442 | |
443 | skb_reset_mac_header(skb); | |
064af421 | 444 | |
50f06e16 BP |
445 | /* Link layer. */ |
446 | eth = eth_hdr(skb); | |
064af421 BP |
447 | memcpy(key->dl_src, eth->h_source, ETH_ALEN); |
448 | memcpy(key->dl_dst, eth->h_dest, ETH_ALEN); | |
50f06e16 BP |
449 | |
450 | /* dl_type, dl_vlan, dl_vlan_pcp. */ | |
451 | __skb_pull(skb, 2 * ETH_ALEN); | |
452 | if (eth->h_proto == htons(ETH_P_8021Q)) | |
453 | parse_vlan(skb, key); | |
454 | key->dl_type = parse_ethertype(skb); | |
455 | skb_reset_network_header(skb); | |
456 | __skb_push(skb, skb->data - (unsigned char *)eth); | |
064af421 BP |
457 | |
458 | /* Network layer. */ | |
4c1ad233 BP |
459 | if (key->dl_type == htons(ETH_P_IP)) { |
460 | struct iphdr *nh; | |
461 | int error; | |
462 | ||
463 | error = check_iphdr(skb); | |
464 | if (unlikely(error)) { | |
465 | if (error == -EINVAL) { | |
466 | skb->transport_header = skb->network_header; | |
467 | return 0; | |
468 | } | |
469 | return error; | |
470 | } | |
471 | ||
472 | nh = ip_hdr(skb); | |
d31f1109 JP |
473 | key->ipv4_src = nh->saddr; |
474 | key->ipv4_dst = nh->daddr; | |
f5e86186 | 475 | key->nw_tos = nh->tos & ~INET_ECN_MASK; |
064af421 | 476 | key->nw_proto = nh->protocol; |
064af421 BP |
477 | |
478 | /* Transport layer. */ | |
875244c7 SH |
479 | if (!(nh->frag_off & htons(IP_MF | IP_OFFSET)) && |
480 | !(skb_shinfo(skb)->gso_type & SKB_GSO_UDP)) { | |
064af421 BP |
481 | if (key->nw_proto == IPPROTO_TCP) { |
482 | if (tcphdr_ok(skb)) { | |
483 | struct tcphdr *tcp = tcp_hdr(skb); | |
484 | key->tp_src = tcp->source; | |
485 | key->tp_dst = tcp->dest; | |
064af421 BP |
486 | } |
487 | } else if (key->nw_proto == IPPROTO_UDP) { | |
488 | if (udphdr_ok(skb)) { | |
489 | struct udphdr *udp = udp_hdr(skb); | |
490 | key->tp_src = udp->source; | |
491 | key->tp_dst = udp->dest; | |
064af421 BP |
492 | } |
493 | } else if (key->nw_proto == IPPROTO_ICMP) { | |
494 | if (icmphdr_ok(skb)) { | |
495 | struct icmphdr *icmp = icmp_hdr(skb); | |
496 | /* The ICMP type and code fields use the 16-bit | |
497 | * transport port fields, so we need to store them | |
498 | * in 16-bit network byte order. */ | |
499 | key->tp_src = htons(icmp->type); | |
500 | key->tp_dst = htons(icmp->code); | |
064af421 BP |
501 | } |
502 | } | |
b7a31ec1 JG |
503 | } else |
504 | *is_frag = true; | |
505 | ||
a26ef517 JP |
506 | } else if (key->dl_type == htons(ETH_P_ARP) && arphdr_ok(skb)) { |
507 | struct arp_eth_header *arp; | |
508 | ||
509 | arp = (struct arp_eth_header *)skb_network_header(skb); | |
510 | ||
f5e86186 | 511 | if (arp->ar_hrd == htons(ARPHRD_ETHER) |
de3f65ea JP |
512 | && arp->ar_pro == htons(ETH_P_IP) |
513 | && arp->ar_hln == ETH_ALEN | |
514 | && arp->ar_pln == 4) { | |
515 | ||
516 | /* We only match on the lower 8 bits of the opcode. */ | |
b7a31ec1 | 517 | if (ntohs(arp->ar_op) <= 0xff) |
de3f65ea | 518 | key->nw_proto = ntohs(arp->ar_op); |
de3f65ea | 519 | |
d295e8e9 | 520 | if (key->nw_proto == ARPOP_REQUEST |
de3f65ea | 521 | || key->nw_proto == ARPOP_REPLY) { |
d31f1109 JP |
522 | memcpy(&key->ipv4_src, arp->ar_sip, sizeof(key->ipv4_src)); |
523 | memcpy(&key->ipv4_dst, arp->ar_tip, sizeof(key->ipv4_dst)); | |
bad68a99 JP |
524 | memcpy(key->arp_sha, arp->ar_sha, ETH_ALEN); |
525 | memcpy(key->arp_tha, arp->ar_tha, ETH_ALEN); | |
de3f65ea JP |
526 | } |
527 | } | |
d31f1109 JP |
528 | } else if (key->dl_type == htons(ETH_P_IPV6)) { |
529 | int nh_len; /* IPv6 Header + Extensions */ | |
530 | ||
531 | nh_len = parse_ipv6hdr(skb, key); | |
532 | if (unlikely(nh_len < 0)) { | |
533 | if (nh_len == -EINVAL) { | |
534 | skb->transport_header = skb->network_header; | |
535 | return 0; | |
536 | } | |
537 | return nh_len; | |
538 | } | |
539 | ||
540 | /* Transport layer. */ | |
541 | if (key->nw_proto == NEXTHDR_TCP) { | |
542 | if (tcphdr_ok(skb)) { | |
543 | struct tcphdr *tcp = tcp_hdr(skb); | |
544 | key->tp_src = tcp->source; | |
545 | key->tp_dst = tcp->dest; | |
546 | } | |
547 | } else if (key->nw_proto == NEXTHDR_UDP) { | |
548 | if (udphdr_ok(skb)) { | |
549 | struct udphdr *udp = udp_hdr(skb); | |
550 | key->tp_src = udp->source; | |
551 | key->tp_dst = udp->dest; | |
552 | } | |
553 | } else if (key->nw_proto == NEXTHDR_ICMP) { | |
554 | if (icmp6hdr_ok(skb)) { | |
685a51a5 JP |
555 | int error = parse_icmpv6(skb, key, nh_len); |
556 | if (error < 0) | |
557 | return error; | |
d31f1109 JP |
558 | } |
559 | } | |
064af421 | 560 | } |
769f8ccd | 561 | return 0; |
064af421 BP |
562 | } |
563 | ||
36956a7d | 564 | u32 flow_hash(const struct sw_flow_key *key) |
8d5ebd83 | 565 | { |
84c17d98 | 566 | return jhash2((u32*)key, sizeof(*key) / sizeof(u32), hash_seed); |
8d5ebd83 JG |
567 | } |
568 | ||
569 | int flow_cmp(const struct tbl_node *node, void *key2_) | |
570 | { | |
36956a7d BP |
571 | const struct sw_flow_key *key1 = &flow_cast(node)->key; |
572 | const struct sw_flow_key *key2 = key2_; | |
8d5ebd83 | 573 | |
36956a7d BP |
574 | return !memcmp(key1, key2, sizeof(struct sw_flow_key)); |
575 | } | |
576 | ||
577 | /** | |
578 | * flow_from_nlattrs - parses Netlink attributes into a flow key. | |
579 | * @swkey: receives the extracted flow key. | |
d6569377 BP |
580 | * @key: Netlink attribute holding nested %ODP_KEY_ATTR_* Netlink attribute |
581 | * sequence. | |
36956a7d BP |
582 | * |
583 | * This state machine accepts the following forms, with [] for optional | |
584 | * elements and | for alternatives: | |
585 | * | |
d31f1109 | 586 | * [tun_id] in_port ethernet [8021q] [ethertype \ |
685a51a5 | 587 | * [IPv4 [TCP|UDP|ICMP] | IPv6 [TCP|UDP|ICMPv6 [ND]] | ARP]] |
36956a7d | 588 | */ |
d6569377 | 589 | int flow_from_nlattrs(struct sw_flow_key *swkey, const struct nlattr *attr) |
36956a7d BP |
590 | { |
591 | const struct nlattr *nla; | |
592 | u16 prev_type; | |
593 | int rem; | |
594 | ||
595 | memset(swkey, 0, sizeof(*swkey)); | |
596 | swkey->dl_type = htons(ETH_P_802_2); | |
597 | ||
598 | prev_type = ODP_KEY_ATTR_UNSPEC; | |
d6569377 | 599 | nla_for_each_nested(nla, attr, rem) { |
36956a7d BP |
600 | static const u32 key_lens[ODP_KEY_ATTR_MAX + 1] = { |
601 | [ODP_KEY_ATTR_TUN_ID] = 8, | |
602 | [ODP_KEY_ATTR_IN_PORT] = 4, | |
603 | [ODP_KEY_ATTR_ETHERNET] = sizeof(struct odp_key_ethernet), | |
604 | [ODP_KEY_ATTR_8021Q] = sizeof(struct odp_key_8021q), | |
605 | [ODP_KEY_ATTR_ETHERTYPE] = 2, | |
606 | [ODP_KEY_ATTR_IPV4] = sizeof(struct odp_key_ipv4), | |
d31f1109 | 607 | [ODP_KEY_ATTR_IPV6] = sizeof(struct odp_key_ipv6), |
36956a7d BP |
608 | [ODP_KEY_ATTR_TCP] = sizeof(struct odp_key_tcp), |
609 | [ODP_KEY_ATTR_UDP] = sizeof(struct odp_key_udp), | |
610 | [ODP_KEY_ATTR_ICMP] = sizeof(struct odp_key_icmp), | |
d31f1109 | 611 | [ODP_KEY_ATTR_ICMPV6] = sizeof(struct odp_key_icmpv6), |
36956a7d | 612 | [ODP_KEY_ATTR_ARP] = sizeof(struct odp_key_arp), |
685a51a5 | 613 | [ODP_KEY_ATTR_ND] = sizeof(struct odp_key_nd), |
36956a7d BP |
614 | }; |
615 | ||
616 | const struct odp_key_ethernet *eth_key; | |
617 | const struct odp_key_8021q *q_key; | |
618 | const struct odp_key_ipv4 *ipv4_key; | |
d31f1109 | 619 | const struct odp_key_ipv6 *ipv6_key; |
36956a7d BP |
620 | const struct odp_key_tcp *tcp_key; |
621 | const struct odp_key_udp *udp_key; | |
622 | const struct odp_key_icmp *icmp_key; | |
d31f1109 | 623 | const struct odp_key_icmpv6 *icmpv6_key; |
36956a7d | 624 | const struct odp_key_arp *arp_key; |
685a51a5 | 625 | const struct odp_key_nd *nd_key; |
36956a7d BP |
626 | |
627 | int type = nla_type(nla); | |
628 | ||
629 | if (type > ODP_KEY_ATTR_MAX || nla_len(nla) != key_lens[type]) | |
630 | return -EINVAL; | |
631 | ||
632 | #define TRANSITION(PREV_TYPE, TYPE) (((PREV_TYPE) << 16) | (TYPE)) | |
633 | switch (TRANSITION(prev_type, type)) { | |
634 | case TRANSITION(ODP_KEY_ATTR_UNSPEC, ODP_KEY_ATTR_TUN_ID): | |
635 | swkey->tun_id = nla_get_be64(nla); | |
636 | break; | |
637 | ||
638 | case TRANSITION(ODP_KEY_ATTR_UNSPEC, ODP_KEY_ATTR_IN_PORT): | |
639 | case TRANSITION(ODP_KEY_ATTR_TUN_ID, ODP_KEY_ATTR_IN_PORT): | |
640 | if (nla_get_u32(nla) >= DP_MAX_PORTS) | |
641 | return -EINVAL; | |
642 | swkey->in_port = nla_get_u32(nla); | |
643 | break; | |
644 | ||
645 | case TRANSITION(ODP_KEY_ATTR_IN_PORT, ODP_KEY_ATTR_ETHERNET): | |
646 | eth_key = nla_data(nla); | |
647 | memcpy(swkey->dl_src, eth_key->eth_src, ETH_ALEN); | |
648 | memcpy(swkey->dl_dst, eth_key->eth_dst, ETH_ALEN); | |
649 | break; | |
650 | ||
651 | case TRANSITION(ODP_KEY_ATTR_ETHERNET, ODP_KEY_ATTR_8021Q): | |
652 | q_key = nla_data(nla); | |
653 | /* Only standard 0x8100 VLANs currently supported. */ | |
654 | if (q_key->q_tpid != htons(ETH_P_8021Q)) | |
655 | return -EINVAL; | |
656 | if (q_key->q_tci & htons(VLAN_TAG_PRESENT)) | |
657 | return -EINVAL; | |
658 | swkey->dl_tci = q_key->q_tci | htons(VLAN_TAG_PRESENT); | |
659 | break; | |
660 | ||
661 | case TRANSITION(ODP_KEY_ATTR_8021Q, ODP_KEY_ATTR_ETHERTYPE): | |
662 | case TRANSITION(ODP_KEY_ATTR_ETHERNET, ODP_KEY_ATTR_ETHERTYPE): | |
663 | swkey->dl_type = nla_get_be16(nla); | |
664 | if (ntohs(swkey->dl_type) < 1536) | |
665 | return -EINVAL; | |
666 | break; | |
667 | ||
668 | case TRANSITION(ODP_KEY_ATTR_ETHERTYPE, ODP_KEY_ATTR_IPV4): | |
669 | if (swkey->dl_type != htons(ETH_P_IP)) | |
670 | return -EINVAL; | |
671 | ipv4_key = nla_data(nla); | |
d31f1109 JP |
672 | swkey->ipv4_src = ipv4_key->ipv4_src; |
673 | swkey->ipv4_dst = ipv4_key->ipv4_dst; | |
36956a7d BP |
674 | swkey->nw_proto = ipv4_key->ipv4_proto; |
675 | swkey->nw_tos = ipv4_key->ipv4_tos; | |
676 | if (swkey->nw_tos & INET_ECN_MASK) | |
677 | return -EINVAL; | |
678 | break; | |
679 | ||
d31f1109 JP |
680 | case TRANSITION(ODP_KEY_ATTR_ETHERTYPE, ODP_KEY_ATTR_IPV6): |
681 | if (swkey->dl_type != htons(ETH_P_IPV6)) | |
682 | return -EINVAL; | |
683 | ipv6_key = nla_data(nla); | |
684 | memcpy(swkey->ipv6_src, ipv6_key->ipv6_src, | |
685 | sizeof(swkey->ipv6_src)); | |
686 | memcpy(swkey->ipv6_dst, ipv6_key->ipv6_dst, | |
687 | sizeof(swkey->ipv6_dst)); | |
688 | swkey->nw_proto = ipv6_key->ipv6_proto; | |
689 | swkey->nw_tos = ipv6_key->ipv6_tos; | |
690 | if (swkey->nw_tos & INET_ECN_MASK) | |
691 | return -EINVAL; | |
692 | break; | |
693 | ||
36956a7d | 694 | case TRANSITION(ODP_KEY_ATTR_IPV4, ODP_KEY_ATTR_TCP): |
d31f1109 | 695 | case TRANSITION(ODP_KEY_ATTR_IPV6, ODP_KEY_ATTR_TCP): |
36956a7d BP |
696 | if (swkey->nw_proto != IPPROTO_TCP) |
697 | return -EINVAL; | |
698 | tcp_key = nla_data(nla); | |
699 | swkey->tp_src = tcp_key->tcp_src; | |
700 | swkey->tp_dst = tcp_key->tcp_dst; | |
701 | break; | |
702 | ||
703 | case TRANSITION(ODP_KEY_ATTR_IPV4, ODP_KEY_ATTR_UDP): | |
d31f1109 | 704 | case TRANSITION(ODP_KEY_ATTR_IPV6, ODP_KEY_ATTR_UDP): |
36956a7d BP |
705 | if (swkey->nw_proto != IPPROTO_UDP) |
706 | return -EINVAL; | |
707 | udp_key = nla_data(nla); | |
708 | swkey->tp_src = udp_key->udp_src; | |
709 | swkey->tp_dst = udp_key->udp_dst; | |
710 | break; | |
711 | ||
712 | case TRANSITION(ODP_KEY_ATTR_IPV4, ODP_KEY_ATTR_ICMP): | |
713 | if (swkey->nw_proto != IPPROTO_ICMP) | |
714 | return -EINVAL; | |
715 | icmp_key = nla_data(nla); | |
716 | swkey->tp_src = htons(icmp_key->icmp_type); | |
717 | swkey->tp_dst = htons(icmp_key->icmp_code); | |
718 | break; | |
719 | ||
d31f1109 JP |
720 | case TRANSITION(ODP_KEY_ATTR_IPV6, ODP_KEY_ATTR_ICMPV6): |
721 | if (swkey->nw_proto != IPPROTO_ICMPV6) | |
722 | return -EINVAL; | |
723 | icmpv6_key = nla_data(nla); | |
724 | swkey->tp_src = htons(icmpv6_key->icmpv6_type); | |
725 | swkey->tp_dst = htons(icmpv6_key->icmpv6_code); | |
726 | break; | |
727 | ||
36956a7d BP |
728 | case TRANSITION(ODP_KEY_ATTR_ETHERTYPE, ODP_KEY_ATTR_ARP): |
729 | if (swkey->dl_type != htons(ETH_P_ARP)) | |
730 | return -EINVAL; | |
731 | arp_key = nla_data(nla); | |
d31f1109 JP |
732 | swkey->ipv4_src = arp_key->arp_sip; |
733 | swkey->ipv4_dst = arp_key->arp_tip; | |
36956a7d BP |
734 | if (arp_key->arp_op & htons(0xff00)) |
735 | return -EINVAL; | |
736 | swkey->nw_proto = ntohs(arp_key->arp_op); | |
bad68a99 JP |
737 | memcpy(swkey->arp_sha, arp_key->arp_sha, ETH_ALEN); |
738 | memcpy(swkey->arp_tha, arp_key->arp_tha, ETH_ALEN); | |
36956a7d BP |
739 | break; |
740 | ||
685a51a5 JP |
741 | case TRANSITION(ODP_KEY_ATTR_ICMPV6, ODP_KEY_ATTR_ND): |
742 | if (swkey->tp_src != htons(NDISC_NEIGHBOUR_SOLICITATION) | |
743 | && swkey->tp_src != htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) | |
744 | return -EINVAL; | |
745 | nd_key = nla_data(nla); | |
746 | memcpy(swkey->nd_target, nd_key->nd_target, | |
747 | sizeof(swkey->nd_target)); | |
748 | memcpy(swkey->arp_sha, nd_key->nd_sll, ETH_ALEN); | |
749 | memcpy(swkey->arp_tha, nd_key->nd_tll, ETH_ALEN); | |
750 | break; | |
751 | ||
36956a7d BP |
752 | default: |
753 | return -EINVAL; | |
754 | } | |
755 | ||
756 | prev_type = type; | |
757 | } | |
758 | if (rem) | |
759 | return -EINVAL; | |
760 | ||
761 | switch (prev_type) { | |
762 | case ODP_KEY_ATTR_UNSPEC: | |
763 | return -EINVAL; | |
764 | ||
765 | case ODP_KEY_ATTR_TUN_ID: | |
766 | case ODP_KEY_ATTR_IN_PORT: | |
767 | return -EINVAL; | |
768 | ||
769 | case ODP_KEY_ATTR_ETHERNET: | |
770 | case ODP_KEY_ATTR_8021Q: | |
771 | return 0; | |
772 | ||
773 | case ODP_KEY_ATTR_ETHERTYPE: | |
774 | if (swkey->dl_type == htons(ETH_P_IP) || | |
775 | swkey->dl_type == htons(ETH_P_ARP)) | |
776 | return -EINVAL; | |
777 | return 0; | |
778 | ||
779 | case ODP_KEY_ATTR_IPV4: | |
780 | if (swkey->nw_proto == IPPROTO_TCP || | |
781 | swkey->nw_proto == IPPROTO_UDP || | |
782 | swkey->nw_proto == IPPROTO_ICMP) | |
783 | return -EINVAL; | |
784 | return 0; | |
785 | ||
d31f1109 JP |
786 | case ODP_KEY_ATTR_IPV6: |
787 | if (swkey->nw_proto == IPPROTO_TCP || | |
788 | swkey->nw_proto == IPPROTO_UDP || | |
789 | swkey->nw_proto == IPPROTO_ICMPV6) | |
790 | return -EINVAL; | |
791 | return 0; | |
792 | ||
685a51a5 JP |
793 | case ODP_KEY_ATTR_ICMPV6: |
794 | if (swkey->tp_src == htons(NDISC_NEIGHBOUR_SOLICITATION) || | |
795 | swkey->tp_src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) | |
796 | return -EINVAL; | |
797 | return 0; | |
798 | ||
36956a7d BP |
799 | case ODP_KEY_ATTR_TCP: |
800 | case ODP_KEY_ATTR_UDP: | |
801 | case ODP_KEY_ATTR_ICMP: | |
802 | case ODP_KEY_ATTR_ARP: | |
685a51a5 | 803 | case ODP_KEY_ATTR_ND: |
36956a7d BP |
804 | return 0; |
805 | } | |
806 | ||
807 | WARN_ON_ONCE(1); | |
808 | return -EINVAL; | |
809 | } | |
810 | ||
d6569377 | 811 | int flow_to_nlattrs(const struct sw_flow_key *swkey, struct sk_buff *skb) |
36956a7d BP |
812 | { |
813 | struct odp_key_ethernet *eth_key; | |
d6569377 | 814 | struct nlattr *nla; |
36956a7d BP |
815 | |
816 | if (swkey->tun_id != cpu_to_be64(0)) | |
d6569377 | 817 | NLA_PUT_BE64(skb, ODP_KEY_ATTR_TUN_ID, swkey->tun_id); |
36956a7d | 818 | |
d6569377 | 819 | NLA_PUT_U32(skb, ODP_KEY_ATTR_IN_PORT, swkey->in_port); |
36956a7d | 820 | |
d6569377 BP |
821 | nla = nla_reserve(skb, ODP_KEY_ATTR_ETHERNET, sizeof(*eth_key)); |
822 | if (!nla) | |
823 | goto nla_put_failure; | |
824 | eth_key = nla_data(nla); | |
36956a7d BP |
825 | memcpy(eth_key->eth_src, swkey->dl_src, ETH_ALEN); |
826 | memcpy(eth_key->eth_dst, swkey->dl_dst, ETH_ALEN); | |
827 | ||
828 | if (swkey->dl_tci != htons(0)) { | |
d6569377 | 829 | struct odp_key_8021q q_key; |
36956a7d | 830 | |
d6569377 BP |
831 | q_key.q_tpid = htons(ETH_P_8021Q); |
832 | q_key.q_tci = swkey->dl_tci & ~htons(VLAN_TAG_PRESENT); | |
833 | NLA_PUT(skb, ODP_KEY_ATTR_8021Q, sizeof(q_key), &q_key); | |
36956a7d BP |
834 | } |
835 | ||
836 | if (swkey->dl_type == htons(ETH_P_802_2)) | |
d6569377 | 837 | return 0; |
36956a7d | 838 | |
d6569377 | 839 | NLA_PUT_BE16(skb, ODP_KEY_ATTR_ETHERTYPE, swkey->dl_type); |
36956a7d BP |
840 | |
841 | if (swkey->dl_type == htons(ETH_P_IP)) { | |
842 | struct odp_key_ipv4 *ipv4_key; | |
843 | ||
d6569377 BP |
844 | nla = nla_reserve(skb, ODP_KEY_ATTR_IPV4, sizeof(*ipv4_key)); |
845 | if (!nla) | |
846 | goto nla_put_failure; | |
847 | ipv4_key = nla_data(nla); | |
d31f1109 JP |
848 | ipv4_key->ipv4_src = swkey->ipv4_src; |
849 | ipv4_key->ipv4_dst = swkey->ipv4_dst; | |
36956a7d BP |
850 | ipv4_key->ipv4_proto = swkey->nw_proto; |
851 | ipv4_key->ipv4_tos = swkey->nw_tos; | |
d31f1109 JP |
852 | } else if (swkey->dl_type == htons(ETH_P_IPV6)) { |
853 | struct odp_key_ipv6 *ipv6_key; | |
854 | ||
855 | nla = nla_reserve(skb, ODP_KEY_ATTR_IPV6, sizeof(*ipv6_key)); | |
856 | if (!nla) | |
857 | goto nla_put_failure; | |
858 | ipv6_key = nla_data(nla); | |
859 | memcpy(ipv6_key->ipv6_src, swkey->ipv6_src, | |
860 | sizeof(ipv6_key->ipv6_src)); | |
861 | memcpy(ipv6_key->ipv6_dst, swkey->ipv6_dst, | |
862 | sizeof(ipv6_key->ipv6_dst)); | |
863 | ipv6_key->ipv6_proto = swkey->nw_proto; | |
864 | ipv6_key->ipv6_tos = swkey->nw_tos; | |
865 | } else if (swkey->dl_type == htons(ETH_P_ARP)) { | |
866 | struct odp_key_arp *arp_key; | |
867 | ||
868 | nla = nla_reserve(skb, ODP_KEY_ATTR_ARP, sizeof(*arp_key)); | |
869 | if (!nla) | |
870 | goto nla_put_failure; | |
871 | arp_key = nla_data(nla); | |
872 | arp_key->arp_sip = swkey->ipv4_src; | |
873 | arp_key->arp_tip = swkey->ipv4_dst; | |
874 | arp_key->arp_op = htons(swkey->nw_proto); | |
875 | memcpy(arp_key->arp_sha, swkey->arp_sha, ETH_ALEN); | |
876 | memcpy(arp_key->arp_tha, swkey->arp_tha, ETH_ALEN); | |
877 | } | |
878 | ||
879 | if (swkey->dl_type == htons(ETH_P_IP) | |
880 | || swkey->dl_type == htons(ETH_P_IPV6)) { | |
36956a7d BP |
881 | |
882 | if (swkey->nw_proto == IPPROTO_TCP) { | |
883 | struct odp_key_tcp *tcp_key; | |
884 | ||
d6569377 BP |
885 | nla = nla_reserve(skb, ODP_KEY_ATTR_TCP, sizeof(*tcp_key)); |
886 | if (!nla) | |
887 | goto nla_put_failure; | |
888 | tcp_key = nla_data(nla); | |
36956a7d BP |
889 | tcp_key->tcp_src = swkey->tp_src; |
890 | tcp_key->tcp_dst = swkey->tp_dst; | |
891 | } else if (swkey->nw_proto == IPPROTO_UDP) { | |
892 | struct odp_key_udp *udp_key; | |
893 | ||
d6569377 BP |
894 | nla = nla_reserve(skb, ODP_KEY_ATTR_UDP, sizeof(*udp_key)); |
895 | if (!nla) | |
896 | goto nla_put_failure; | |
897 | udp_key = nla_data(nla); | |
36956a7d BP |
898 | udp_key->udp_src = swkey->tp_src; |
899 | udp_key->udp_dst = swkey->tp_dst; | |
d31f1109 JP |
900 | } else if (swkey->dl_type == htons(ETH_P_IP) |
901 | && swkey->nw_proto == IPPROTO_ICMP) { | |
36956a7d BP |
902 | struct odp_key_icmp *icmp_key; |
903 | ||
d6569377 BP |
904 | nla = nla_reserve(skb, ODP_KEY_ATTR_ICMP, sizeof(*icmp_key)); |
905 | if (!nla) | |
906 | goto nla_put_failure; | |
907 | icmp_key = nla_data(nla); | |
36956a7d BP |
908 | icmp_key->icmp_type = ntohs(swkey->tp_src); |
909 | icmp_key->icmp_code = ntohs(swkey->tp_dst); | |
d31f1109 JP |
910 | } else if (swkey->dl_type == htons(ETH_P_IPV6) |
911 | && swkey->nw_proto == IPPROTO_ICMPV6) { | |
912 | struct odp_key_icmpv6 *icmpv6_key; | |
36956a7d | 913 | |
d31f1109 JP |
914 | nla = nla_reserve(skb, ODP_KEY_ATTR_ICMPV6, sizeof(*icmpv6_key)); |
915 | if (!nla) | |
916 | goto nla_put_failure; | |
917 | icmpv6_key = nla_data(nla); | |
918 | icmpv6_key->icmpv6_type = ntohs(swkey->tp_src); | |
919 | icmpv6_key->icmpv6_code = ntohs(swkey->tp_dst); | |
685a51a5 JP |
920 | |
921 | if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION | |
922 | || icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) { | |
923 | struct odp_key_nd *nd_key; | |
924 | ||
925 | nla = nla_reserve(skb, ODP_KEY_ATTR_ND, sizeof(*nd_key)); | |
926 | if (!nla) | |
927 | goto nla_put_failure; | |
928 | nd_key = nla_data(nla); | |
929 | memcpy(nd_key->nd_target, swkey->nd_target, | |
930 | sizeof(nd_key->nd_target)); | |
931 | memcpy(nd_key->nd_sll, swkey->arp_sha, ETH_ALEN); | |
932 | memcpy(nd_key->nd_tll, swkey->arp_tha, ETH_ALEN); | |
933 | } | |
d31f1109 | 934 | } |
36956a7d BP |
935 | } |
936 | ||
d6569377 | 937 | return 0; |
36956a7d | 938 | |
d6569377 BP |
939 | nla_put_failure: |
940 | return -EMSGSIZE; | |
8d5ebd83 JG |
941 | } |
942 | ||
064af421 BP |
943 | /* Initializes the flow module. |
944 | * Returns zero if successful or a negative error code. */ | |
945 | int flow_init(void) | |
946 | { | |
947 | flow_cache = kmem_cache_create("sw_flow", sizeof(struct sw_flow), 0, | |
948 | 0, NULL); | |
949 | if (flow_cache == NULL) | |
950 | return -ENOMEM; | |
951 | ||
84c17d98 | 952 | get_random_bytes(&hash_seed, sizeof(hash_seed)); |
8d5ebd83 | 953 | |
064af421 BP |
954 | return 0; |
955 | } | |
956 | ||
957 | /* Uninitializes the flow module. */ | |
958 | void flow_exit(void) | |
959 | { | |
960 | kmem_cache_destroy(flow_cache); | |
961 | } |