Commit | Line | Data |
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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 | ||
19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
20 | ||
21 | #include <linux/skbuff.h> | |
22 | #include <linux/in.h> | |
23 | #include <linux/ip.h> | |
24 | #include <linux/openvswitch.h> | |
a175a723 | 25 | #include <linux/sctp.h> |
ccb1352e JG |
26 | #include <linux/tcp.h> |
27 | #include <linux/udp.h> | |
28 | #include <linux/in6.h> | |
29 | #include <linux/if_arp.h> | |
30 | #include <linux/if_vlan.h> | |
25cd9ba0 | 31 | |
ccb1352e | 32 | #include <net/ip.h> |
3fdbd1ce | 33 | #include <net/ipv6.h> |
ccb1352e JG |
34 | #include <net/checksum.h> |
35 | #include <net/dsfield.h> | |
25cd9ba0 | 36 | #include <net/mpls.h> |
a175a723 | 37 | #include <net/sctp/checksum.h> |
ccb1352e JG |
38 | |
39 | #include "datapath.h" | |
971427f3 | 40 | #include "flow.h" |
ccb1352e JG |
41 | #include "vport.h" |
42 | ||
43 | static int do_execute_actions(struct datapath *dp, struct sk_buff *skb, | |
2ff3e4e4 | 44 | struct sw_flow_key *key, |
651887b0 | 45 | const struct nlattr *attr, int len); |
ccb1352e | 46 | |
971427f3 AZ |
47 | struct deferred_action { |
48 | struct sk_buff *skb; | |
49 | const struct nlattr *actions; | |
50 | ||
51 | /* Store pkt_key clone when creating deferred action. */ | |
52 | struct sw_flow_key pkt_key; | |
53 | }; | |
54 | ||
55 | #define DEFERRED_ACTION_FIFO_SIZE 10 | |
56 | struct action_fifo { | |
57 | int head; | |
58 | int tail; | |
59 | /* Deferred action fifo queue storage. */ | |
60 | struct deferred_action fifo[DEFERRED_ACTION_FIFO_SIZE]; | |
61 | }; | |
62 | ||
63 | static struct action_fifo __percpu *action_fifos; | |
64 | static DEFINE_PER_CPU(int, exec_actions_level); | |
65 | ||
66 | static void action_fifo_init(struct action_fifo *fifo) | |
67 | { | |
68 | fifo->head = 0; | |
69 | fifo->tail = 0; | |
70 | } | |
71 | ||
12eb18f7 | 72 | static bool action_fifo_is_empty(const struct action_fifo *fifo) |
971427f3 AZ |
73 | { |
74 | return (fifo->head == fifo->tail); | |
75 | } | |
76 | ||
77 | static struct deferred_action *action_fifo_get(struct action_fifo *fifo) | |
78 | { | |
79 | if (action_fifo_is_empty(fifo)) | |
80 | return NULL; | |
81 | ||
82 | return &fifo->fifo[fifo->tail++]; | |
83 | } | |
84 | ||
85 | static struct deferred_action *action_fifo_put(struct action_fifo *fifo) | |
86 | { | |
87 | if (fifo->head >= DEFERRED_ACTION_FIFO_SIZE - 1) | |
88 | return NULL; | |
89 | ||
90 | return &fifo->fifo[fifo->head++]; | |
91 | } | |
92 | ||
93 | /* Return true if fifo is not full */ | |
94 | static struct deferred_action *add_deferred_actions(struct sk_buff *skb, | |
12eb18f7 | 95 | const struct sw_flow_key *key, |
971427f3 AZ |
96 | const struct nlattr *attr) |
97 | { | |
98 | struct action_fifo *fifo; | |
99 | struct deferred_action *da; | |
100 | ||
101 | fifo = this_cpu_ptr(action_fifos); | |
102 | da = action_fifo_put(fifo); | |
103 | if (da) { | |
104 | da->skb = skb; | |
105 | da->actions = attr; | |
106 | da->pkt_key = *key; | |
107 | } | |
108 | ||
109 | return da; | |
110 | } | |
111 | ||
fff06c36 PS |
112 | static void invalidate_flow_key(struct sw_flow_key *key) |
113 | { | |
114 | key->eth.type = htons(0); | |
115 | } | |
116 | ||
117 | static bool is_flow_key_valid(const struct sw_flow_key *key) | |
118 | { | |
119 | return !!key->eth.type; | |
120 | } | |
121 | ||
fff06c36 | 122 | static int push_mpls(struct sk_buff *skb, struct sw_flow_key *key, |
25cd9ba0 SH |
123 | const struct ovs_action_push_mpls *mpls) |
124 | { | |
125 | __be32 *new_mpls_lse; | |
126 | struct ethhdr *hdr; | |
127 | ||
128 | /* Networking stack do not allow simultaneous Tunnel and MPLS GSO. */ | |
129 | if (skb->encapsulation) | |
130 | return -ENOTSUPP; | |
131 | ||
132 | if (skb_cow_head(skb, MPLS_HLEN) < 0) | |
133 | return -ENOMEM; | |
134 | ||
135 | skb_push(skb, MPLS_HLEN); | |
136 | memmove(skb_mac_header(skb) - MPLS_HLEN, skb_mac_header(skb), | |
137 | skb->mac_len); | |
138 | skb_reset_mac_header(skb); | |
139 | ||
140 | new_mpls_lse = (__be32 *)skb_mpls_header(skb); | |
141 | *new_mpls_lse = mpls->mpls_lse; | |
142 | ||
143 | if (skb->ip_summed == CHECKSUM_COMPLETE) | |
144 | skb->csum = csum_add(skb->csum, csum_partial(new_mpls_lse, | |
145 | MPLS_HLEN, 0)); | |
146 | ||
147 | hdr = eth_hdr(skb); | |
148 | hdr->h_proto = mpls->mpls_ethertype; | |
149 | ||
cbe7e76d PS |
150 | if (!skb->inner_protocol) |
151 | skb_set_inner_protocol(skb, skb->protocol); | |
25cd9ba0 SH |
152 | skb->protocol = mpls->mpls_ethertype; |
153 | ||
fff06c36 | 154 | invalidate_flow_key(key); |
25cd9ba0 SH |
155 | return 0; |
156 | } | |
157 | ||
fff06c36 PS |
158 | static int pop_mpls(struct sk_buff *skb, struct sw_flow_key *key, |
159 | const __be16 ethertype) | |
25cd9ba0 SH |
160 | { |
161 | struct ethhdr *hdr; | |
162 | int err; | |
163 | ||
e2195121 | 164 | err = skb_ensure_writable(skb, skb->mac_len + MPLS_HLEN); |
25cd9ba0 SH |
165 | if (unlikely(err)) |
166 | return err; | |
167 | ||
1abcd82c | 168 | skb_postpull_rcsum(skb, skb_mpls_header(skb), MPLS_HLEN); |
25cd9ba0 SH |
169 | |
170 | memmove(skb_mac_header(skb) + MPLS_HLEN, skb_mac_header(skb), | |
171 | skb->mac_len); | |
172 | ||
173 | __skb_pull(skb, MPLS_HLEN); | |
174 | skb_reset_mac_header(skb); | |
175 | ||
176 | /* skb_mpls_header() is used to locate the ethertype | |
177 | * field correctly in the presence of VLAN tags. | |
178 | */ | |
179 | hdr = (struct ethhdr *)(skb_mpls_header(skb) - ETH_HLEN); | |
180 | hdr->h_proto = ethertype; | |
181 | if (eth_p_mpls(skb->protocol)) | |
182 | skb->protocol = ethertype; | |
fff06c36 PS |
183 | |
184 | invalidate_flow_key(key); | |
25cd9ba0 SH |
185 | return 0; |
186 | } | |
187 | ||
83d2b9ba JR |
188 | static int set_mpls(struct sk_buff *skb, struct sw_flow_key *flow_key, |
189 | const __be32 *mpls_lse, const __be32 *mask) | |
25cd9ba0 SH |
190 | { |
191 | __be32 *stack; | |
83d2b9ba | 192 | __be32 lse; |
25cd9ba0 SH |
193 | int err; |
194 | ||
e2195121 | 195 | err = skb_ensure_writable(skb, skb->mac_len + MPLS_HLEN); |
25cd9ba0 SH |
196 | if (unlikely(err)) |
197 | return err; | |
198 | ||
199 | stack = (__be32 *)skb_mpls_header(skb); | |
be26b9a8 | 200 | lse = OVS_MASKED(*stack, *mpls_lse, *mask); |
25cd9ba0 | 201 | if (skb->ip_summed == CHECKSUM_COMPLETE) { |
83d2b9ba JR |
202 | __be32 diff[] = { ~(*stack), lse }; |
203 | ||
25cd9ba0 SH |
204 | skb->csum = ~csum_partial((char *)diff, sizeof(diff), |
205 | ~skb->csum); | |
206 | } | |
207 | ||
83d2b9ba JR |
208 | *stack = lse; |
209 | flow_key->mpls.top_lse = lse; | |
25cd9ba0 SH |
210 | return 0; |
211 | } | |
212 | ||
fff06c36 | 213 | static int pop_vlan(struct sk_buff *skb, struct sw_flow_key *key) |
ccb1352e | 214 | { |
ccb1352e JG |
215 | int err; |
216 | ||
93515d53 | 217 | err = skb_vlan_pop(skb); |
df8a39de | 218 | if (skb_vlan_tag_present(skb)) |
93515d53 JP |
219 | invalidate_flow_key(key); |
220 | else | |
fff06c36 | 221 | key->eth.tci = 0; |
93515d53 | 222 | return err; |
ccb1352e JG |
223 | } |
224 | ||
fff06c36 PS |
225 | static int push_vlan(struct sk_buff *skb, struct sw_flow_key *key, |
226 | const struct ovs_action_push_vlan *vlan) | |
ccb1352e | 227 | { |
df8a39de | 228 | if (skb_vlan_tag_present(skb)) |
fff06c36 | 229 | invalidate_flow_key(key); |
93515d53 | 230 | else |
fff06c36 | 231 | key->eth.tci = vlan->vlan_tci; |
93515d53 JP |
232 | return skb_vlan_push(skb, vlan->vlan_tpid, |
233 | ntohs(vlan->vlan_tci) & ~VLAN_TAG_PRESENT); | |
ccb1352e JG |
234 | } |
235 | ||
83d2b9ba JR |
236 | /* 'src' is already properly masked. */ |
237 | static void ether_addr_copy_masked(u8 *dst_, const u8 *src_, const u8 *mask_) | |
238 | { | |
239 | u16 *dst = (u16 *)dst_; | |
240 | const u16 *src = (const u16 *)src_; | |
241 | const u16 *mask = (const u16 *)mask_; | |
242 | ||
be26b9a8 JS |
243 | OVS_SET_MASKED(dst[0], src[0], mask[0]); |
244 | OVS_SET_MASKED(dst[1], src[1], mask[1]); | |
245 | OVS_SET_MASKED(dst[2], src[2], mask[2]); | |
83d2b9ba JR |
246 | } |
247 | ||
248 | static int set_eth_addr(struct sk_buff *skb, struct sw_flow_key *flow_key, | |
249 | const struct ovs_key_ethernet *key, | |
250 | const struct ovs_key_ethernet *mask) | |
ccb1352e JG |
251 | { |
252 | int err; | |
83d2b9ba | 253 | |
e2195121 | 254 | err = skb_ensure_writable(skb, ETH_HLEN); |
ccb1352e JG |
255 | if (unlikely(err)) |
256 | return err; | |
257 | ||
b34df5e8 PS |
258 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_ALEN * 2); |
259 | ||
83d2b9ba JR |
260 | ether_addr_copy_masked(eth_hdr(skb)->h_source, key->eth_src, |
261 | mask->eth_src); | |
262 | ether_addr_copy_masked(eth_hdr(skb)->h_dest, key->eth_dst, | |
263 | mask->eth_dst); | |
ccb1352e | 264 | |
b34df5e8 PS |
265 | ovs_skb_postpush_rcsum(skb, eth_hdr(skb), ETH_ALEN * 2); |
266 | ||
83d2b9ba JR |
267 | ether_addr_copy(flow_key->eth.src, eth_hdr(skb)->h_source); |
268 | ether_addr_copy(flow_key->eth.dst, eth_hdr(skb)->h_dest); | |
ccb1352e JG |
269 | return 0; |
270 | } | |
271 | ||
3576fd79 GG |
272 | static void update_ip_l4_checksum(struct sk_buff *skb, struct iphdr *nh, |
273 | __be32 addr, __be32 new_addr) | |
ccb1352e JG |
274 | { |
275 | int transport_len = skb->len - skb_transport_offset(skb); | |
276 | ||
3576fd79 GG |
277 | if (nh->frag_off & htons(IP_OFFSET)) |
278 | return; | |
279 | ||
ccb1352e JG |
280 | if (nh->protocol == IPPROTO_TCP) { |
281 | if (likely(transport_len >= sizeof(struct tcphdr))) | |
282 | inet_proto_csum_replace4(&tcp_hdr(skb)->check, skb, | |
4b048d6d | 283 | addr, new_addr, true); |
ccb1352e | 284 | } else if (nh->protocol == IPPROTO_UDP) { |
81e5d41d JG |
285 | if (likely(transport_len >= sizeof(struct udphdr))) { |
286 | struct udphdr *uh = udp_hdr(skb); | |
287 | ||
288 | if (uh->check || skb->ip_summed == CHECKSUM_PARTIAL) { | |
289 | inet_proto_csum_replace4(&uh->check, skb, | |
4b048d6d | 290 | addr, new_addr, true); |
81e5d41d JG |
291 | if (!uh->check) |
292 | uh->check = CSUM_MANGLED_0; | |
293 | } | |
294 | } | |
ccb1352e | 295 | } |
3576fd79 | 296 | } |
ccb1352e | 297 | |
3576fd79 GG |
298 | static void set_ip_addr(struct sk_buff *skb, struct iphdr *nh, |
299 | __be32 *addr, __be32 new_addr) | |
300 | { | |
301 | update_ip_l4_checksum(skb, nh, *addr, new_addr); | |
ccb1352e | 302 | csum_replace4(&nh->check, *addr, new_addr); |
7539fadc | 303 | skb_clear_hash(skb); |
ccb1352e JG |
304 | *addr = new_addr; |
305 | } | |
306 | ||
3fdbd1ce AA |
307 | static void update_ipv6_checksum(struct sk_buff *skb, u8 l4_proto, |
308 | __be32 addr[4], const __be32 new_addr[4]) | |
309 | { | |
310 | int transport_len = skb->len - skb_transport_offset(skb); | |
311 | ||
856447d0 | 312 | if (l4_proto == NEXTHDR_TCP) { |
3fdbd1ce AA |
313 | if (likely(transport_len >= sizeof(struct tcphdr))) |
314 | inet_proto_csum_replace16(&tcp_hdr(skb)->check, skb, | |
4b048d6d | 315 | addr, new_addr, true); |
856447d0 | 316 | } else if (l4_proto == NEXTHDR_UDP) { |
3fdbd1ce AA |
317 | if (likely(transport_len >= sizeof(struct udphdr))) { |
318 | struct udphdr *uh = udp_hdr(skb); | |
319 | ||
320 | if (uh->check || skb->ip_summed == CHECKSUM_PARTIAL) { | |
321 | inet_proto_csum_replace16(&uh->check, skb, | |
4b048d6d | 322 | addr, new_addr, true); |
3fdbd1ce AA |
323 | if (!uh->check) |
324 | uh->check = CSUM_MANGLED_0; | |
325 | } | |
326 | } | |
856447d0 JG |
327 | } else if (l4_proto == NEXTHDR_ICMP) { |
328 | if (likely(transport_len >= sizeof(struct icmp6hdr))) | |
329 | inet_proto_csum_replace16(&icmp6_hdr(skb)->icmp6_cksum, | |
4b048d6d | 330 | skb, addr, new_addr, true); |
3fdbd1ce AA |
331 | } |
332 | } | |
333 | ||
83d2b9ba JR |
334 | static void mask_ipv6_addr(const __be32 old[4], const __be32 addr[4], |
335 | const __be32 mask[4], __be32 masked[4]) | |
336 | { | |
be26b9a8 JS |
337 | masked[0] = OVS_MASKED(old[0], addr[0], mask[0]); |
338 | masked[1] = OVS_MASKED(old[1], addr[1], mask[1]); | |
339 | masked[2] = OVS_MASKED(old[2], addr[2], mask[2]); | |
340 | masked[3] = OVS_MASKED(old[3], addr[3], mask[3]); | |
83d2b9ba JR |
341 | } |
342 | ||
3fdbd1ce AA |
343 | static void set_ipv6_addr(struct sk_buff *skb, u8 l4_proto, |
344 | __be32 addr[4], const __be32 new_addr[4], | |
345 | bool recalculate_csum) | |
346 | { | |
347 | if (recalculate_csum) | |
348 | update_ipv6_checksum(skb, l4_proto, addr, new_addr); | |
349 | ||
7539fadc | 350 | skb_clear_hash(skb); |
3fdbd1ce AA |
351 | memcpy(addr, new_addr, sizeof(__be32[4])); |
352 | } | |
353 | ||
83d2b9ba | 354 | static void set_ipv6_fl(struct ipv6hdr *nh, u32 fl, u32 mask) |
3fdbd1ce | 355 | { |
83d2b9ba | 356 | /* Bits 21-24 are always unmasked, so this retains their values. */ |
be26b9a8 JS |
357 | OVS_SET_MASKED(nh->flow_lbl[0], (u8)(fl >> 16), (u8)(mask >> 16)); |
358 | OVS_SET_MASKED(nh->flow_lbl[1], (u8)(fl >> 8), (u8)(mask >> 8)); | |
359 | OVS_SET_MASKED(nh->flow_lbl[2], (u8)fl, (u8)mask); | |
3fdbd1ce AA |
360 | } |
361 | ||
83d2b9ba JR |
362 | static void set_ip_ttl(struct sk_buff *skb, struct iphdr *nh, u8 new_ttl, |
363 | u8 mask) | |
3fdbd1ce | 364 | { |
be26b9a8 | 365 | new_ttl = OVS_MASKED(nh->ttl, new_ttl, mask); |
3fdbd1ce | 366 | |
ccb1352e JG |
367 | csum_replace2(&nh->check, htons(nh->ttl << 8), htons(new_ttl << 8)); |
368 | nh->ttl = new_ttl; | |
369 | } | |
370 | ||
83d2b9ba JR |
371 | static int set_ipv4(struct sk_buff *skb, struct sw_flow_key *flow_key, |
372 | const struct ovs_key_ipv4 *key, | |
373 | const struct ovs_key_ipv4 *mask) | |
ccb1352e JG |
374 | { |
375 | struct iphdr *nh; | |
83d2b9ba | 376 | __be32 new_addr; |
ccb1352e JG |
377 | int err; |
378 | ||
e2195121 JP |
379 | err = skb_ensure_writable(skb, skb_network_offset(skb) + |
380 | sizeof(struct iphdr)); | |
ccb1352e JG |
381 | if (unlikely(err)) |
382 | return err; | |
383 | ||
384 | nh = ip_hdr(skb); | |
385 | ||
83d2b9ba JR |
386 | /* Setting an IP addresses is typically only a side effect of |
387 | * matching on them in the current userspace implementation, so it | |
388 | * makes sense to check if the value actually changed. | |
389 | */ | |
390 | if (mask->ipv4_src) { | |
be26b9a8 | 391 | new_addr = OVS_MASKED(nh->saddr, key->ipv4_src, mask->ipv4_src); |
ccb1352e | 392 | |
83d2b9ba JR |
393 | if (unlikely(new_addr != nh->saddr)) { |
394 | set_ip_addr(skb, nh, &nh->saddr, new_addr); | |
395 | flow_key->ipv4.addr.src = new_addr; | |
396 | } | |
fff06c36 | 397 | } |
83d2b9ba | 398 | if (mask->ipv4_dst) { |
be26b9a8 | 399 | new_addr = OVS_MASKED(nh->daddr, key->ipv4_dst, mask->ipv4_dst); |
ccb1352e | 400 | |
83d2b9ba JR |
401 | if (unlikely(new_addr != nh->daddr)) { |
402 | set_ip_addr(skb, nh, &nh->daddr, new_addr); | |
403 | flow_key->ipv4.addr.dst = new_addr; | |
404 | } | |
fff06c36 | 405 | } |
83d2b9ba JR |
406 | if (mask->ipv4_tos) { |
407 | ipv4_change_dsfield(nh, ~mask->ipv4_tos, key->ipv4_tos); | |
408 | flow_key->ip.tos = nh->tos; | |
409 | } | |
410 | if (mask->ipv4_ttl) { | |
411 | set_ip_ttl(skb, nh, key->ipv4_ttl, mask->ipv4_ttl); | |
412 | flow_key->ip.ttl = nh->ttl; | |
fff06c36 | 413 | } |
ccb1352e JG |
414 | |
415 | return 0; | |
416 | } | |
417 | ||
83d2b9ba JR |
418 | static bool is_ipv6_mask_nonzero(const __be32 addr[4]) |
419 | { | |
420 | return !!(addr[0] | addr[1] | addr[2] | addr[3]); | |
421 | } | |
422 | ||
423 | static int set_ipv6(struct sk_buff *skb, struct sw_flow_key *flow_key, | |
424 | const struct ovs_key_ipv6 *key, | |
425 | const struct ovs_key_ipv6 *mask) | |
3fdbd1ce AA |
426 | { |
427 | struct ipv6hdr *nh; | |
428 | int err; | |
3fdbd1ce | 429 | |
e2195121 JP |
430 | err = skb_ensure_writable(skb, skb_network_offset(skb) + |
431 | sizeof(struct ipv6hdr)); | |
3fdbd1ce AA |
432 | if (unlikely(err)) |
433 | return err; | |
434 | ||
435 | nh = ipv6_hdr(skb); | |
3fdbd1ce | 436 | |
83d2b9ba JR |
437 | /* Setting an IP addresses is typically only a side effect of |
438 | * matching on them in the current userspace implementation, so it | |
439 | * makes sense to check if the value actually changed. | |
440 | */ | |
441 | if (is_ipv6_mask_nonzero(mask->ipv6_src)) { | |
442 | __be32 *saddr = (__be32 *)&nh->saddr; | |
443 | __be32 masked[4]; | |
444 | ||
445 | mask_ipv6_addr(saddr, key->ipv6_src, mask->ipv6_src, masked); | |
446 | ||
447 | if (unlikely(memcmp(saddr, masked, sizeof(masked)))) { | |
448 | set_ipv6_addr(skb, key->ipv6_proto, saddr, masked, | |
449 | true); | |
450 | memcpy(&flow_key->ipv6.addr.src, masked, | |
451 | sizeof(flow_key->ipv6.addr.src)); | |
452 | } | |
453 | } | |
454 | if (is_ipv6_mask_nonzero(mask->ipv6_dst)) { | |
3fdbd1ce AA |
455 | unsigned int offset = 0; |
456 | int flags = IP6_FH_F_SKIP_RH; | |
457 | bool recalc_csum = true; | |
83d2b9ba JR |
458 | __be32 *daddr = (__be32 *)&nh->daddr; |
459 | __be32 masked[4]; | |
460 | ||
461 | mask_ipv6_addr(daddr, key->ipv6_dst, mask->ipv6_dst, masked); | |
462 | ||
463 | if (unlikely(memcmp(daddr, masked, sizeof(masked)))) { | |
464 | if (ipv6_ext_hdr(nh->nexthdr)) | |
465 | recalc_csum = (ipv6_find_hdr(skb, &offset, | |
466 | NEXTHDR_ROUTING, | |
467 | NULL, &flags) | |
468 | != NEXTHDR_ROUTING); | |
469 | ||
470 | set_ipv6_addr(skb, key->ipv6_proto, daddr, masked, | |
471 | recalc_csum); | |
472 | memcpy(&flow_key->ipv6.addr.dst, masked, | |
473 | sizeof(flow_key->ipv6.addr.dst)); | |
474 | } | |
475 | } | |
476 | if (mask->ipv6_tclass) { | |
477 | ipv6_change_dsfield(nh, ~mask->ipv6_tclass, key->ipv6_tclass); | |
478 | flow_key->ip.tos = ipv6_get_dsfield(nh); | |
479 | } | |
480 | if (mask->ipv6_label) { | |
481 | set_ipv6_fl(nh, ntohl(key->ipv6_label), | |
482 | ntohl(mask->ipv6_label)); | |
483 | flow_key->ipv6.label = | |
484 | *(__be32 *)nh & htonl(IPV6_FLOWINFO_FLOWLABEL); | |
485 | } | |
486 | if (mask->ipv6_hlimit) { | |
be26b9a8 JS |
487 | OVS_SET_MASKED(nh->hop_limit, key->ipv6_hlimit, |
488 | mask->ipv6_hlimit); | |
83d2b9ba | 489 | flow_key->ip.ttl = nh->hop_limit; |
3fdbd1ce | 490 | } |
3fdbd1ce AA |
491 | return 0; |
492 | } | |
493 | ||
e2195121 | 494 | /* Must follow skb_ensure_writable() since that can move the skb data. */ |
ccb1352e | 495 | static void set_tp_port(struct sk_buff *skb, __be16 *port, |
83d2b9ba | 496 | __be16 new_port, __sum16 *check) |
ccb1352e | 497 | { |
4b048d6d | 498 | inet_proto_csum_replace2(check, skb, *port, new_port, false); |
ccb1352e | 499 | *port = new_port; |
81e5d41d JG |
500 | } |
501 | ||
83d2b9ba JR |
502 | static int set_udp(struct sk_buff *skb, struct sw_flow_key *flow_key, |
503 | const struct ovs_key_udp *key, | |
504 | const struct ovs_key_udp *mask) | |
ccb1352e JG |
505 | { |
506 | struct udphdr *uh; | |
83d2b9ba | 507 | __be16 src, dst; |
ccb1352e JG |
508 | int err; |
509 | ||
e2195121 JP |
510 | err = skb_ensure_writable(skb, skb_transport_offset(skb) + |
511 | sizeof(struct udphdr)); | |
ccb1352e JG |
512 | if (unlikely(err)) |
513 | return err; | |
514 | ||
515 | uh = udp_hdr(skb); | |
83d2b9ba | 516 | /* Either of the masks is non-zero, so do not bother checking them. */ |
be26b9a8 JS |
517 | src = OVS_MASKED(uh->source, key->udp_src, mask->udp_src); |
518 | dst = OVS_MASKED(uh->dest, key->udp_dst, mask->udp_dst); | |
ccb1352e | 519 | |
83d2b9ba JR |
520 | if (uh->check && skb->ip_summed != CHECKSUM_PARTIAL) { |
521 | if (likely(src != uh->source)) { | |
522 | set_tp_port(skb, &uh->source, src, &uh->check); | |
523 | flow_key->tp.src = src; | |
524 | } | |
525 | if (likely(dst != uh->dest)) { | |
526 | set_tp_port(skb, &uh->dest, dst, &uh->check); | |
527 | flow_key->tp.dst = dst; | |
528 | } | |
529 | ||
530 | if (unlikely(!uh->check)) | |
531 | uh->check = CSUM_MANGLED_0; | |
532 | } else { | |
533 | uh->source = src; | |
534 | uh->dest = dst; | |
535 | flow_key->tp.src = src; | |
536 | flow_key->tp.dst = dst; | |
fff06c36 | 537 | } |
ccb1352e | 538 | |
83d2b9ba JR |
539 | skb_clear_hash(skb); |
540 | ||
ccb1352e JG |
541 | return 0; |
542 | } | |
543 | ||
83d2b9ba JR |
544 | static int set_tcp(struct sk_buff *skb, struct sw_flow_key *flow_key, |
545 | const struct ovs_key_tcp *key, | |
546 | const struct ovs_key_tcp *mask) | |
ccb1352e JG |
547 | { |
548 | struct tcphdr *th; | |
83d2b9ba | 549 | __be16 src, dst; |
ccb1352e JG |
550 | int err; |
551 | ||
e2195121 JP |
552 | err = skb_ensure_writable(skb, skb_transport_offset(skb) + |
553 | sizeof(struct tcphdr)); | |
ccb1352e JG |
554 | if (unlikely(err)) |
555 | return err; | |
556 | ||
557 | th = tcp_hdr(skb); | |
be26b9a8 | 558 | src = OVS_MASKED(th->source, key->tcp_src, mask->tcp_src); |
83d2b9ba JR |
559 | if (likely(src != th->source)) { |
560 | set_tp_port(skb, &th->source, src, &th->check); | |
561 | flow_key->tp.src = src; | |
fff06c36 | 562 | } |
be26b9a8 | 563 | dst = OVS_MASKED(th->dest, key->tcp_dst, mask->tcp_dst); |
83d2b9ba JR |
564 | if (likely(dst != th->dest)) { |
565 | set_tp_port(skb, &th->dest, dst, &th->check); | |
566 | flow_key->tp.dst = dst; | |
fff06c36 | 567 | } |
83d2b9ba | 568 | skb_clear_hash(skb); |
ccb1352e JG |
569 | |
570 | return 0; | |
571 | } | |
572 | ||
83d2b9ba JR |
573 | static int set_sctp(struct sk_buff *skb, struct sw_flow_key *flow_key, |
574 | const struct ovs_key_sctp *key, | |
575 | const struct ovs_key_sctp *mask) | |
a175a723 | 576 | { |
83d2b9ba | 577 | unsigned int sctphoff = skb_transport_offset(skb); |
a175a723 | 578 | struct sctphdr *sh; |
83d2b9ba | 579 | __le32 old_correct_csum, new_csum, old_csum; |
a175a723 | 580 | int err; |
a175a723 | 581 | |
e2195121 | 582 | err = skb_ensure_writable(skb, sctphoff + sizeof(struct sctphdr)); |
a175a723 JS |
583 | if (unlikely(err)) |
584 | return err; | |
585 | ||
586 | sh = sctp_hdr(skb); | |
83d2b9ba JR |
587 | old_csum = sh->checksum; |
588 | old_correct_csum = sctp_compute_cksum(skb, sctphoff); | |
a175a723 | 589 | |
be26b9a8 JS |
590 | sh->source = OVS_MASKED(sh->source, key->sctp_src, mask->sctp_src); |
591 | sh->dest = OVS_MASKED(sh->dest, key->sctp_dst, mask->sctp_dst); | |
a175a723 | 592 | |
83d2b9ba | 593 | new_csum = sctp_compute_cksum(skb, sctphoff); |
a175a723 | 594 | |
83d2b9ba JR |
595 | /* Carry any checksum errors through. */ |
596 | sh->checksum = old_csum ^ old_correct_csum ^ new_csum; | |
a175a723 | 597 | |
83d2b9ba JR |
598 | skb_clear_hash(skb); |
599 | flow_key->tp.src = sh->source; | |
600 | flow_key->tp.dst = sh->dest; | |
a175a723 JS |
601 | |
602 | return 0; | |
603 | } | |
604 | ||
738967b8 | 605 | static void do_output(struct datapath *dp, struct sk_buff *skb, int out_port) |
ccb1352e | 606 | { |
738967b8 | 607 | struct vport *vport = ovs_vport_rcu(dp, out_port); |
ccb1352e | 608 | |
738967b8 AZ |
609 | if (likely(vport)) |
610 | ovs_vport_send(vport, skb); | |
611 | else | |
ccb1352e | 612 | kfree_skb(skb); |
ccb1352e JG |
613 | } |
614 | ||
615 | static int output_userspace(struct datapath *dp, struct sk_buff *skb, | |
ccea7445 NM |
616 | struct sw_flow_key *key, const struct nlattr *attr, |
617 | const struct nlattr *actions, int actions_len) | |
ccb1352e | 618 | { |
1d8fff90 | 619 | struct ip_tunnel_info info; |
ccb1352e JG |
620 | struct dp_upcall_info upcall; |
621 | const struct nlattr *a; | |
622 | int rem; | |
623 | ||
ccea7445 | 624 | memset(&upcall, 0, sizeof(upcall)); |
ccb1352e | 625 | upcall.cmd = OVS_PACKET_CMD_ACTION; |
ccb1352e JG |
626 | |
627 | for (a = nla_data(attr), rem = nla_len(attr); rem > 0; | |
628 | a = nla_next(a, &rem)) { | |
629 | switch (nla_type(a)) { | |
630 | case OVS_USERSPACE_ATTR_USERDATA: | |
631 | upcall.userdata = a; | |
632 | break; | |
633 | ||
634 | case OVS_USERSPACE_ATTR_PID: | |
15e47304 | 635 | upcall.portid = nla_get_u32(a); |
ccb1352e | 636 | break; |
8f0aad6f WZ |
637 | |
638 | case OVS_USERSPACE_ATTR_EGRESS_TUN_PORT: { | |
639 | /* Get out tunnel info. */ | |
640 | struct vport *vport; | |
641 | ||
642 | vport = ovs_vport_rcu(dp, nla_get_u32(a)); | |
643 | if (vport) { | |
644 | int err; | |
645 | ||
646 | err = ovs_vport_get_egress_tun_info(vport, skb, | |
647 | &info); | |
648 | if (!err) | |
649 | upcall.egress_tun_info = &info; | |
650 | } | |
651 | break; | |
ccb1352e | 652 | } |
8f0aad6f | 653 | |
ccea7445 NM |
654 | case OVS_USERSPACE_ATTR_ACTIONS: { |
655 | /* Include actions. */ | |
656 | upcall.actions = actions; | |
657 | upcall.actions_len = actions_len; | |
658 | break; | |
659 | } | |
660 | ||
8f0aad6f | 661 | } /* End of switch. */ |
ccb1352e JG |
662 | } |
663 | ||
e8eedb85 | 664 | return ovs_dp_upcall(dp, skb, key, &upcall); |
ccb1352e JG |
665 | } |
666 | ||
667 | static int sample(struct datapath *dp, struct sk_buff *skb, | |
ccea7445 NM |
668 | struct sw_flow_key *key, const struct nlattr *attr, |
669 | const struct nlattr *actions, int actions_len) | |
ccb1352e JG |
670 | { |
671 | const struct nlattr *acts_list = NULL; | |
672 | const struct nlattr *a; | |
673 | int rem; | |
674 | ||
675 | for (a = nla_data(attr), rem = nla_len(attr); rem > 0; | |
676 | a = nla_next(a, &rem)) { | |
e05176a3 WZ |
677 | u32 probability; |
678 | ||
ccb1352e JG |
679 | switch (nla_type(a)) { |
680 | case OVS_SAMPLE_ATTR_PROBABILITY: | |
e05176a3 WZ |
681 | probability = nla_get_u32(a); |
682 | if (!probability || prandom_u32() > probability) | |
ccb1352e JG |
683 | return 0; |
684 | break; | |
685 | ||
686 | case OVS_SAMPLE_ATTR_ACTIONS: | |
687 | acts_list = a; | |
688 | break; | |
689 | } | |
690 | } | |
691 | ||
651887b0 SH |
692 | rem = nla_len(acts_list); |
693 | a = nla_data(acts_list); | |
694 | ||
32ae87ff AZ |
695 | /* Actions list is empty, do nothing */ |
696 | if (unlikely(!rem)) | |
697 | return 0; | |
651887b0 | 698 | |
32ae87ff AZ |
699 | /* The only known usage of sample action is having a single user-space |
700 | * action. Treat this usage as a special case. | |
701 | * The output_userspace() should clone the skb to be sent to the | |
702 | * user space. This skb will be consumed by its caller. | |
651887b0 | 703 | */ |
32ae87ff | 704 | if (likely(nla_type(a) == OVS_ACTION_ATTR_USERSPACE && |
941d8ebc | 705 | nla_is_last(a, rem))) |
ccea7445 | 706 | return output_userspace(dp, skb, key, a, actions, actions_len); |
32ae87ff AZ |
707 | |
708 | skb = skb_clone(skb, GFP_ATOMIC); | |
709 | if (!skb) | |
710 | /* Skip the sample action when out of memory. */ | |
711 | return 0; | |
712 | ||
971427f3 AZ |
713 | if (!add_deferred_actions(skb, key, a)) { |
714 | if (net_ratelimit()) | |
715 | pr_warn("%s: deferred actions limit reached, dropping sample action\n", | |
716 | ovs_dp_name(dp)); | |
717 | ||
718 | kfree_skb(skb); | |
719 | } | |
720 | return 0; | |
721 | } | |
722 | ||
723 | static void execute_hash(struct sk_buff *skb, struct sw_flow_key *key, | |
724 | const struct nlattr *attr) | |
725 | { | |
726 | struct ovs_action_hash *hash_act = nla_data(attr); | |
727 | u32 hash = 0; | |
728 | ||
729 | /* OVS_HASH_ALG_L4 is the only possible hash algorithm. */ | |
730 | hash = skb_get_hash(skb); | |
731 | hash = jhash_1word(hash, hash_act->hash_basis); | |
732 | if (!hash) | |
733 | hash = 0x1; | |
734 | ||
735 | key->ovs_flow_hash = hash; | |
ccb1352e JG |
736 | } |
737 | ||
83d2b9ba JR |
738 | static int execute_set_action(struct sk_buff *skb, |
739 | struct sw_flow_key *flow_key, | |
740 | const struct nlattr *a) | |
741 | { | |
742 | /* Only tunnel set execution is supported without a mask. */ | |
743 | if (nla_type(a) == OVS_KEY_ATTR_TUNNEL_INFO) { | |
34ae932a TG |
744 | struct ovs_tunnel_info *tun = nla_data(a); |
745 | ||
746 | skb_dst_drop(skb); | |
747 | dst_hold((struct dst_entry *)tun->tun_dst); | |
748 | skb_dst_set(skb, (struct dst_entry *)tun->tun_dst); | |
749 | ||
750 | /* FIXME: Remove when all vports have been converted */ | |
751 | OVS_CB(skb)->egress_tun_info = &tun->tun_dst->u.tun_info; | |
752 | ||
83d2b9ba JR |
753 | return 0; |
754 | } | |
755 | ||
756 | return -EINVAL; | |
757 | } | |
758 | ||
759 | /* Mask is at the midpoint of the data. */ | |
760 | #define get_mask(a, type) ((const type)nla_data(a) + 1) | |
761 | ||
762 | static int execute_masked_set_action(struct sk_buff *skb, | |
763 | struct sw_flow_key *flow_key, | |
764 | const struct nlattr *a) | |
ccb1352e JG |
765 | { |
766 | int err = 0; | |
767 | ||
83d2b9ba | 768 | switch (nla_type(a)) { |
ccb1352e | 769 | case OVS_KEY_ATTR_PRIORITY: |
be26b9a8 JS |
770 | OVS_SET_MASKED(skb->priority, nla_get_u32(a), |
771 | *get_mask(a, u32 *)); | |
83d2b9ba | 772 | flow_key->phy.priority = skb->priority; |
ccb1352e JG |
773 | break; |
774 | ||
39c7caeb | 775 | case OVS_KEY_ATTR_SKB_MARK: |
be26b9a8 | 776 | OVS_SET_MASKED(skb->mark, nla_get_u32(a), *get_mask(a, u32 *)); |
83d2b9ba | 777 | flow_key->phy.skb_mark = skb->mark; |
39c7caeb AA |
778 | break; |
779 | ||
f0b128c1 | 780 | case OVS_KEY_ATTR_TUNNEL_INFO: |
83d2b9ba JR |
781 | /* Masked data not supported for tunnel. */ |
782 | err = -EINVAL; | |
7d5437c7 PS |
783 | break; |
784 | ||
ccb1352e | 785 | case OVS_KEY_ATTR_ETHERNET: |
83d2b9ba JR |
786 | err = set_eth_addr(skb, flow_key, nla_data(a), |
787 | get_mask(a, struct ovs_key_ethernet *)); | |
ccb1352e JG |
788 | break; |
789 | ||
790 | case OVS_KEY_ATTR_IPV4: | |
83d2b9ba JR |
791 | err = set_ipv4(skb, flow_key, nla_data(a), |
792 | get_mask(a, struct ovs_key_ipv4 *)); | |
ccb1352e JG |
793 | break; |
794 | ||
3fdbd1ce | 795 | case OVS_KEY_ATTR_IPV6: |
83d2b9ba JR |
796 | err = set_ipv6(skb, flow_key, nla_data(a), |
797 | get_mask(a, struct ovs_key_ipv6 *)); | |
3fdbd1ce AA |
798 | break; |
799 | ||
ccb1352e | 800 | case OVS_KEY_ATTR_TCP: |
83d2b9ba JR |
801 | err = set_tcp(skb, flow_key, nla_data(a), |
802 | get_mask(a, struct ovs_key_tcp *)); | |
ccb1352e JG |
803 | break; |
804 | ||
805 | case OVS_KEY_ATTR_UDP: | |
83d2b9ba JR |
806 | err = set_udp(skb, flow_key, nla_data(a), |
807 | get_mask(a, struct ovs_key_udp *)); | |
ccb1352e | 808 | break; |
a175a723 JS |
809 | |
810 | case OVS_KEY_ATTR_SCTP: | |
83d2b9ba JR |
811 | err = set_sctp(skb, flow_key, nla_data(a), |
812 | get_mask(a, struct ovs_key_sctp *)); | |
a175a723 | 813 | break; |
25cd9ba0 SH |
814 | |
815 | case OVS_KEY_ATTR_MPLS: | |
83d2b9ba JR |
816 | err = set_mpls(skb, flow_key, nla_data(a), get_mask(a, |
817 | __be32 *)); | |
25cd9ba0 | 818 | break; |
ccb1352e JG |
819 | } |
820 | ||
821 | return err; | |
822 | } | |
823 | ||
971427f3 AZ |
824 | static int execute_recirc(struct datapath *dp, struct sk_buff *skb, |
825 | struct sw_flow_key *key, | |
826 | const struct nlattr *a, int rem) | |
827 | { | |
828 | struct deferred_action *da; | |
971427f3 | 829 | |
fff06c36 PS |
830 | if (!is_flow_key_valid(key)) { |
831 | int err; | |
832 | ||
833 | err = ovs_flow_key_update(skb, key); | |
834 | if (err) | |
835 | return err; | |
836 | } | |
837 | BUG_ON(!is_flow_key_valid(key)); | |
971427f3 | 838 | |
941d8ebc | 839 | if (!nla_is_last(a, rem)) { |
971427f3 AZ |
840 | /* Recirc action is the not the last action |
841 | * of the action list, need to clone the skb. | |
842 | */ | |
843 | skb = skb_clone(skb, GFP_ATOMIC); | |
844 | ||
845 | /* Skip the recirc action when out of memory, but | |
846 | * continue on with the rest of the action list. | |
847 | */ | |
848 | if (!skb) | |
849 | return 0; | |
850 | } | |
851 | ||
852 | da = add_deferred_actions(skb, key, NULL); | |
853 | if (da) { | |
854 | da->pkt_key.recirc_id = nla_get_u32(a); | |
855 | } else { | |
856 | kfree_skb(skb); | |
857 | ||
858 | if (net_ratelimit()) | |
859 | pr_warn("%s: deferred action limit reached, drop recirc action\n", | |
860 | ovs_dp_name(dp)); | |
861 | } | |
862 | ||
863 | return 0; | |
864 | } | |
865 | ||
ccb1352e JG |
866 | /* Execute a list of actions against 'skb'. */ |
867 | static int do_execute_actions(struct datapath *dp, struct sk_buff *skb, | |
2ff3e4e4 | 868 | struct sw_flow_key *key, |
651887b0 | 869 | const struct nlattr *attr, int len) |
ccb1352e JG |
870 | { |
871 | /* Every output action needs a separate clone of 'skb', but the common | |
872 | * case is just a single output action, so that doing a clone and | |
873 | * then freeing the original skbuff is wasteful. So the following code | |
fff06c36 PS |
874 | * is slightly obscure just to avoid that. |
875 | */ | |
ccb1352e JG |
876 | int prev_port = -1; |
877 | const struct nlattr *a; | |
878 | int rem; | |
879 | ||
880 | for (a = attr, rem = len; rem > 0; | |
881 | a = nla_next(a, &rem)) { | |
882 | int err = 0; | |
883 | ||
738967b8 AZ |
884 | if (unlikely(prev_port != -1)) { |
885 | struct sk_buff *out_skb = skb_clone(skb, GFP_ATOMIC); | |
886 | ||
887 | if (out_skb) | |
888 | do_output(dp, out_skb, prev_port); | |
889 | ||
ccb1352e JG |
890 | prev_port = -1; |
891 | } | |
892 | ||
893 | switch (nla_type(a)) { | |
894 | case OVS_ACTION_ATTR_OUTPUT: | |
895 | prev_port = nla_get_u32(a); | |
896 | break; | |
897 | ||
898 | case OVS_ACTION_ATTR_USERSPACE: | |
ccea7445 | 899 | output_userspace(dp, skb, key, a, attr, len); |
ccb1352e JG |
900 | break; |
901 | ||
971427f3 AZ |
902 | case OVS_ACTION_ATTR_HASH: |
903 | execute_hash(skb, key, a); | |
904 | break; | |
905 | ||
25cd9ba0 | 906 | case OVS_ACTION_ATTR_PUSH_MPLS: |
fff06c36 | 907 | err = push_mpls(skb, key, nla_data(a)); |
25cd9ba0 SH |
908 | break; |
909 | ||
910 | case OVS_ACTION_ATTR_POP_MPLS: | |
fff06c36 | 911 | err = pop_mpls(skb, key, nla_get_be16(a)); |
25cd9ba0 SH |
912 | break; |
913 | ||
ccb1352e | 914 | case OVS_ACTION_ATTR_PUSH_VLAN: |
fff06c36 | 915 | err = push_vlan(skb, key, nla_data(a)); |
ccb1352e JG |
916 | break; |
917 | ||
918 | case OVS_ACTION_ATTR_POP_VLAN: | |
fff06c36 | 919 | err = pop_vlan(skb, key); |
ccb1352e JG |
920 | break; |
921 | ||
971427f3 AZ |
922 | case OVS_ACTION_ATTR_RECIRC: |
923 | err = execute_recirc(dp, skb, key, a, rem); | |
941d8ebc | 924 | if (nla_is_last(a, rem)) { |
971427f3 AZ |
925 | /* If this is the last action, the skb has |
926 | * been consumed or freed. | |
927 | * Return immediately. | |
928 | */ | |
929 | return err; | |
930 | } | |
931 | break; | |
932 | ||
ccb1352e | 933 | case OVS_ACTION_ATTR_SET: |
fff06c36 | 934 | err = execute_set_action(skb, key, nla_data(a)); |
ccb1352e JG |
935 | break; |
936 | ||
83d2b9ba JR |
937 | case OVS_ACTION_ATTR_SET_MASKED: |
938 | case OVS_ACTION_ATTR_SET_TO_MASKED: | |
939 | err = execute_masked_set_action(skb, key, nla_data(a)); | |
940 | break; | |
941 | ||
ccb1352e | 942 | case OVS_ACTION_ATTR_SAMPLE: |
ccea7445 | 943 | err = sample(dp, skb, key, a, attr, len); |
ccb1352e JG |
944 | break; |
945 | } | |
946 | ||
947 | if (unlikely(err)) { | |
948 | kfree_skb(skb); | |
949 | return err; | |
950 | } | |
951 | } | |
952 | ||
651887b0 | 953 | if (prev_port != -1) |
ccb1352e | 954 | do_output(dp, skb, prev_port); |
651887b0 | 955 | else |
ccb1352e JG |
956 | consume_skb(skb); |
957 | ||
958 | return 0; | |
959 | } | |
960 | ||
971427f3 AZ |
961 | static void process_deferred_actions(struct datapath *dp) |
962 | { | |
963 | struct action_fifo *fifo = this_cpu_ptr(action_fifos); | |
964 | ||
965 | /* Do not touch the FIFO in case there is no deferred actions. */ | |
966 | if (action_fifo_is_empty(fifo)) | |
967 | return; | |
968 | ||
969 | /* Finishing executing all deferred actions. */ | |
970 | do { | |
971 | struct deferred_action *da = action_fifo_get(fifo); | |
972 | struct sk_buff *skb = da->skb; | |
973 | struct sw_flow_key *key = &da->pkt_key; | |
974 | const struct nlattr *actions = da->actions; | |
975 | ||
976 | if (actions) | |
977 | do_execute_actions(dp, skb, key, actions, | |
978 | nla_len(actions)); | |
979 | else | |
980 | ovs_dp_process_packet(skb, key); | |
981 | } while (!action_fifo_is_empty(fifo)); | |
982 | ||
983 | /* Reset FIFO for the next packet. */ | |
984 | action_fifo_init(fifo); | |
985 | } | |
986 | ||
ccb1352e | 987 | /* Execute a list of actions against 'skb'. */ |
2ff3e4e4 | 988 | int ovs_execute_actions(struct datapath *dp, struct sk_buff *skb, |
12eb18f7 TG |
989 | const struct sw_flow_actions *acts, |
990 | struct sw_flow_key *key) | |
ccb1352e | 991 | { |
971427f3 | 992 | int level = this_cpu_read(exec_actions_level); |
971427f3 AZ |
993 | int err; |
994 | ||
971427f3 | 995 | this_cpu_inc(exec_actions_level); |
f0b128c1 | 996 | OVS_CB(skb)->egress_tun_info = NULL; |
971427f3 AZ |
997 | err = do_execute_actions(dp, skb, key, |
998 | acts->actions, acts->actions_len); | |
999 | ||
1000 | if (!level) | |
1001 | process_deferred_actions(dp); | |
1002 | ||
1003 | this_cpu_dec(exec_actions_level); | |
1004 | return err; | |
1005 | } | |
1006 | ||
1007 | int action_fifos_init(void) | |
1008 | { | |
1009 | action_fifos = alloc_percpu(struct action_fifo); | |
1010 | if (!action_fifos) | |
1011 | return -ENOMEM; | |
ccb1352e | 1012 | |
971427f3 AZ |
1013 | return 0; |
1014 | } | |
1015 | ||
1016 | void action_fifos_exit(void) | |
1017 | { | |
1018 | free_percpu(action_fifos); | |
ccb1352e | 1019 | } |