1
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4
5
6#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
7
8#include <linux/skbuff.h>
9#include <linux/in.h>
10#include <linux/ip.h>
11#include <linux/openvswitch.h>
12#include <linux/netfilter_ipv6.h>
13#include <linux/sctp.h>
14#include <linux/tcp.h>
15#include <linux/udp.h>
16#include <linux/in6.h>
17#include <linux/if_arp.h>
18#include <linux/if_vlan.h>
19
20#include <net/dst.h>
21#include <net/ip.h>
22#include <net/ipv6.h>
23#include <net/ip6_fib.h>
24#include <net/checksum.h>
25#include <net/dsfield.h>
26#include <net/mpls.h>
27#include <net/sctp/checksum.h>
28
29#include "datapath.h"
30#include "flow.h"
31#include "conntrack.h"
32#include "vport.h"
33#include "flow_netlink.h"
34
35struct deferred_action {
36 struct sk_buff *skb;
37 const struct nlattr *actions;
38 int actions_len;
39
40
41 struct sw_flow_key pkt_key;
42};
43
44#define MAX_L2_LEN (VLAN_ETH_HLEN + 3 * MPLS_HLEN)
45struct ovs_frag_data {
46 unsigned long dst;
47 struct vport *vport;
48 struct ovs_skb_cb cb;
49 __be16 inner_protocol;
50 u16 network_offset;
51 u16 vlan_tci;
52 __be16 vlan_proto;
53 unsigned int l2_len;
54 u8 mac_proto;
55 u8 l2_data[MAX_L2_LEN];
56};
57
58static DEFINE_PER_CPU(struct ovs_frag_data, ovs_frag_data_storage);
59
60#define DEFERRED_ACTION_FIFO_SIZE 10
61#define OVS_RECURSION_LIMIT 5
62#define OVS_DEFERRED_ACTION_THRESHOLD (OVS_RECURSION_LIMIT - 2)
63struct action_fifo {
64 int head;
65 int tail;
66
67 struct deferred_action fifo[DEFERRED_ACTION_FIFO_SIZE];
68};
69
70struct action_flow_keys {
71 struct sw_flow_key key[OVS_DEFERRED_ACTION_THRESHOLD];
72};
73
74static struct action_fifo __percpu *action_fifos;
75static struct action_flow_keys __percpu *flow_keys;
76static DEFINE_PER_CPU(int, exec_actions_level);
77
78
79
80
81static struct sw_flow_key *clone_key(const struct sw_flow_key *key_)
82{
83 struct action_flow_keys *keys = this_cpu_ptr(flow_keys);
84 int level = this_cpu_read(exec_actions_level);
85 struct sw_flow_key *key = NULL;
86
87 if (level <= OVS_DEFERRED_ACTION_THRESHOLD) {
88 key = &keys->key[level - 1];
89 *key = *key_;
90 }
91
92 return key;
93}
94
95static void action_fifo_init(struct action_fifo *fifo)
96{
97 fifo->head = 0;
98 fifo->tail = 0;
99}
100
101static bool action_fifo_is_empty(const struct action_fifo *fifo)
102{
103 return (fifo->head == fifo->tail);
104}
105
106static struct deferred_action *action_fifo_get(struct action_fifo *fifo)
107{
108 if (action_fifo_is_empty(fifo))
109 return NULL;
110
111 return &fifo->fifo[fifo->tail++];
112}
113
114static struct deferred_action *action_fifo_put(struct action_fifo *fifo)
115{
116 if (fifo->head >= DEFERRED_ACTION_FIFO_SIZE - 1)
117 return NULL;
118
119 return &fifo->fifo[fifo->head++];
120}
121
122
123static struct deferred_action *add_deferred_actions(struct sk_buff *skb,
124 const struct sw_flow_key *key,
125 const struct nlattr *actions,
126 const int actions_len)
127{
128 struct action_fifo *fifo;
129 struct deferred_action *da;
130
131 fifo = this_cpu_ptr(action_fifos);
132 da = action_fifo_put(fifo);
133 if (da) {
134 da->skb = skb;
135 da->actions = actions;
136 da->actions_len = actions_len;
137 da->pkt_key = *key;
138 }
139
140 return da;
141}
142
143static void invalidate_flow_key(struct sw_flow_key *key)
144{
145 key->mac_proto |= SW_FLOW_KEY_INVALID;
146}
147
148static bool is_flow_key_valid(const struct sw_flow_key *key)
149{
150 return !(key->mac_proto & SW_FLOW_KEY_INVALID);
151}
152
153static int clone_execute(struct datapath *dp, struct sk_buff *skb,
154 struct sw_flow_key *key,
155 u32 recirc_id,
156 const struct nlattr *actions, int len,
157 bool last, bool clone_flow_key);
158
159static int do_execute_actions(struct datapath *dp, struct sk_buff *skb,
160 struct sw_flow_key *key,
161 const struct nlattr *attr, int len);
162
163static int push_mpls(struct sk_buff *skb, struct sw_flow_key *key,
164 const struct ovs_action_push_mpls *mpls)
165{
166 int err;
167
168 err = skb_mpls_push(skb, mpls->mpls_lse, mpls->mpls_ethertype);
169 if (err)
170 return err;
171
172 invalidate_flow_key(key);
173 return 0;
174}
175
176static int pop_mpls(struct sk_buff *skb, struct sw_flow_key *key,
177 const __be16 ethertype)
178{
179 int err;
180
181 err = skb_mpls_pop(skb, ethertype);
182 if (err)
183 return err;
184
185 invalidate_flow_key(key);
186 return 0;
187}
188
189static int set_mpls(struct sk_buff *skb, struct sw_flow_key *flow_key,
190 const __be32 *mpls_lse, const __be32 *mask)
191{
192 struct mpls_shim_hdr *stack;
193 __be32 lse;
194 int err;
195
196 stack = mpls_hdr(skb);
197 lse = OVS_MASKED(stack->label_stack_entry, *mpls_lse, *mask);
198 err = skb_mpls_update_lse(skb, lse);
199 if (err)
200 return err;
201
202 flow_key->mpls.top_lse = lse;
203 return 0;
204}
205
206static int pop_vlan(struct sk_buff *skb, struct sw_flow_key *key)
207{
208 int err;
209
210 err = skb_vlan_pop(skb);
211 if (skb_vlan_tag_present(skb)) {
212 invalidate_flow_key(key);
213 } else {
214 key->eth.vlan.tci = 0;
215 key->eth.vlan.tpid = 0;
216 }
217 return err;
218}
219
220static int push_vlan(struct sk_buff *skb, struct sw_flow_key *key,
221 const struct ovs_action_push_vlan *vlan)
222{
223 if (skb_vlan_tag_present(skb)) {
224 invalidate_flow_key(key);
225 } else {
226 key->eth.vlan.tci = vlan->vlan_tci;
227 key->eth.vlan.tpid = vlan->vlan_tpid;
228 }
229 return skb_vlan_push(skb, vlan->vlan_tpid,
230 ntohs(vlan->vlan_tci) & ~VLAN_CFI_MASK);
231}
232
233
234static void ether_addr_copy_masked(u8 *dst_, const u8 *src_, const u8 *mask_)
235{
236 u16 *dst = (u16 *)dst_;
237 const u16 *src = (const u16 *)src_;
238 const u16 *mask = (const u16 *)mask_;
239
240 OVS_SET_MASKED(dst[0], src[0], mask[0]);
241 OVS_SET_MASKED(dst[1], src[1], mask[1]);
242 OVS_SET_MASKED(dst[2], src[2], mask[2]);
243}
244
245static int set_eth_addr(struct sk_buff *skb, struct sw_flow_key *flow_key,
246 const struct ovs_key_ethernet *key,
247 const struct ovs_key_ethernet *mask)
248{
249 int err;
250
251 err = skb_ensure_writable(skb, ETH_HLEN);
252 if (unlikely(err))
253 return err;
254
255 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_ALEN * 2);
256
257 ether_addr_copy_masked(eth_hdr(skb)->h_source, key->eth_src,
258 mask->eth_src);
259 ether_addr_copy_masked(eth_hdr(skb)->h_dest, key->eth_dst,
260 mask->eth_dst);
261
262 skb_postpush_rcsum(skb, eth_hdr(skb), ETH_ALEN * 2);
263
264 ether_addr_copy(flow_key->eth.src, eth_hdr(skb)->h_source);
265 ether_addr_copy(flow_key->eth.dst, eth_hdr(skb)->h_dest);
266 return 0;
267}
268
269
270
271
272static int pop_eth(struct sk_buff *skb, struct sw_flow_key *key)
273{
274 skb_pull_rcsum(skb, ETH_HLEN);
275 skb_reset_mac_header(skb);
276 skb_reset_mac_len(skb);
277
278
279 key->mac_proto = MAC_PROTO_NONE;
280 invalidate_flow_key(key);
281 return 0;
282}
283
284static int push_eth(struct sk_buff *skb, struct sw_flow_key *key,
285 const struct ovs_action_push_eth *ethh)
286{
287 struct ethhdr *hdr;
288
289
290 if (skb_cow_head(skb, ETH_HLEN) < 0)
291 return -ENOMEM;
292
293 skb_push(skb, ETH_HLEN);
294 skb_reset_mac_header(skb);
295 skb_reset_mac_len(skb);
296
297 hdr = eth_hdr(skb);
298 ether_addr_copy(hdr->h_source, ethh->addresses.eth_src);
299 ether_addr_copy(hdr->h_dest, ethh->addresses.eth_dst);
300 hdr->h_proto = skb->protocol;
301
302 skb_postpush_rcsum(skb, hdr, ETH_HLEN);
303
304
305 key->mac_proto = MAC_PROTO_ETHERNET;
306 invalidate_flow_key(key);
307 return 0;
308}
309
310static int push_nsh(struct sk_buff *skb, struct sw_flow_key *key,
311 const struct nshhdr *nh)
312{
313 int err;
314
315 err = nsh_push(skb, nh);
316 if (err)
317 return err;
318
319
320 key->mac_proto = MAC_PROTO_NONE;
321 invalidate_flow_key(key);
322 return 0;
323}
324
325static int pop_nsh(struct sk_buff *skb, struct sw_flow_key *key)
326{
327 int err;
328
329 err = nsh_pop(skb);
330 if (err)
331 return err;
332
333
334 if (skb->protocol == htons(ETH_P_TEB))
335 key->mac_proto = MAC_PROTO_ETHERNET;
336 else
337 key->mac_proto = MAC_PROTO_NONE;
338 invalidate_flow_key(key);
339 return 0;
340}
341
342static void update_ip_l4_checksum(struct sk_buff *skb, struct iphdr *nh,
343 __be32 addr, __be32 new_addr)
344{
345 int transport_len = skb->len - skb_transport_offset(skb);
346
347 if (nh->frag_off & htons(IP_OFFSET))
348 return;
349
350 if (nh->protocol == IPPROTO_TCP) {
351 if (likely(transport_len >= sizeof(struct tcphdr)))
352 inet_proto_csum_replace4(&tcp_hdr(skb)->check, skb,
353 addr, new_addr, true);
354 } else if (nh->protocol == IPPROTO_UDP) {
355 if (likely(transport_len >= sizeof(struct udphdr))) {
356 struct udphdr *uh = udp_hdr(skb);
357
358 if (uh->check || skb->ip_summed == CHECKSUM_PARTIAL) {
359 inet_proto_csum_replace4(&uh->check, skb,
360 addr, new_addr, true);
361 if (!uh->check)
362 uh->check = CSUM_MANGLED_0;
363 }
364 }
365 }
366}
367
368static void set_ip_addr(struct sk_buff *skb, struct iphdr *nh,
369 __be32 *addr, __be32 new_addr)
370{
371 update_ip_l4_checksum(skb, nh, *addr, new_addr);
372 csum_replace4(&nh->check, *addr, new_addr);
373 skb_clear_hash(skb);
374 *addr = new_addr;
375}
376
377static void update_ipv6_checksum(struct sk_buff *skb, u8 l4_proto,
378 __be32 addr[4], const __be32 new_addr[4])
379{
380 int transport_len = skb->len - skb_transport_offset(skb);
381
382 if (l4_proto == NEXTHDR_TCP) {
383 if (likely(transport_len >= sizeof(struct tcphdr)))
384 inet_proto_csum_replace16(&tcp_hdr(skb)->check, skb,
385 addr, new_addr, true);
386 } else if (l4_proto == NEXTHDR_UDP) {
387 if (likely(transport_len >= sizeof(struct udphdr))) {
388 struct udphdr *uh = udp_hdr(skb);
389
390 if (uh->check || skb->ip_summed == CHECKSUM_PARTIAL) {
391 inet_proto_csum_replace16(&uh->check, skb,
392 addr, new_addr, true);
393 if (!uh->check)
394 uh->check = CSUM_MANGLED_0;
395 }
396 }
397 } else if (l4_proto == NEXTHDR_ICMP) {
398 if (likely(transport_len >= sizeof(struct icmp6hdr)))
399 inet_proto_csum_replace16(&icmp6_hdr(skb)->icmp6_cksum,
400 skb, addr, new_addr, true);
401 }
402}
403
404static void mask_ipv6_addr(const __be32 old[4], const __be32 addr[4],
405 const __be32 mask[4], __be32 masked[4])
406{
407 masked[0] = OVS_MASKED(old[0], addr[0], mask[0]);
408 masked[1] = OVS_MASKED(old[1], addr[1], mask[1]);
409 masked[2] = OVS_MASKED(old[2], addr[2], mask[2]);
410 masked[3] = OVS_MASKED(old[3], addr[3], mask[3]);
411}
412
413static void set_ipv6_addr(struct sk_buff *skb, u8 l4_proto,
414 __be32 addr[4], const __be32 new_addr[4],
415 bool recalculate_csum)
416{
417 if (recalculate_csum)
418 update_ipv6_checksum(skb, l4_proto, addr, new_addr);
419
420 skb_clear_hash(skb);
421 memcpy(addr, new_addr, sizeof(__be32[4]));
422}
423
424static void set_ipv6_fl(struct ipv6hdr *nh, u32 fl, u32 mask)
425{
426
427 OVS_SET_MASKED(nh->flow_lbl[0], (u8)(fl >> 16), (u8)(mask >> 16));
428 OVS_SET_MASKED(nh->flow_lbl[1], (u8)(fl >> 8), (u8)(mask >> 8));
429 OVS_SET_MASKED(nh->flow_lbl[2], (u8)fl, (u8)mask);
430}
431
432static void set_ip_ttl(struct sk_buff *skb, struct iphdr *nh, u8 new_ttl,
433 u8 mask)
434{
435 new_ttl = OVS_MASKED(nh->ttl, new_ttl, mask);
436
437 csum_replace2(&nh->check, htons(nh->ttl << 8), htons(new_ttl << 8));
438 nh->ttl = new_ttl;
439}
440
441static int set_ipv4(struct sk_buff *skb, struct sw_flow_key *flow_key,
442 const struct ovs_key_ipv4 *key,
443 const struct ovs_key_ipv4 *mask)
444{
445 struct iphdr *nh;
446 __be32 new_addr;
447 int err;
448
449 err = skb_ensure_writable(skb, skb_network_offset(skb) +
450 sizeof(struct iphdr));
451 if (unlikely(err))
452 return err;
453
454 nh = ip_hdr(skb);
455
456
457
458
459
460 if (mask->ipv4_src) {
461 new_addr = OVS_MASKED(nh->saddr, key->ipv4_src, mask->ipv4_src);
462
463 if (unlikely(new_addr != nh->saddr)) {
464 set_ip_addr(skb, nh, &nh->saddr, new_addr);
465 flow_key->ipv4.addr.src = new_addr;
466 }
467 }
468 if (mask->ipv4_dst) {
469 new_addr = OVS_MASKED(nh->daddr, key->ipv4_dst, mask->ipv4_dst);
470
471 if (unlikely(new_addr != nh->daddr)) {
472 set_ip_addr(skb, nh, &nh->daddr, new_addr);
473 flow_key->ipv4.addr.dst = new_addr;
474 }
475 }
476 if (mask->ipv4_tos) {
477 ipv4_change_dsfield(nh, ~mask->ipv4_tos, key->ipv4_tos);
478 flow_key->ip.tos = nh->tos;
479 }
480 if (mask->ipv4_ttl) {
481 set_ip_ttl(skb, nh, key->ipv4_ttl, mask->ipv4_ttl);
482 flow_key->ip.ttl = nh->ttl;
483 }
484
485 return 0;
486}
487
488static bool is_ipv6_mask_nonzero(const __be32 addr[4])
489{
490 return !!(addr[0] | addr[1] | addr[2] | addr[3]);
491}
492
493static int set_ipv6(struct sk_buff *skb, struct sw_flow_key *flow_key,
494 const struct ovs_key_ipv6 *key,
495 const struct ovs_key_ipv6 *mask)
496{
497 struct ipv6hdr *nh;
498 int err;
499
500 err = skb_ensure_writable(skb, skb_network_offset(skb) +
501 sizeof(struct ipv6hdr));
502 if (unlikely(err))
503 return err;
504
505 nh = ipv6_hdr(skb);
506
507
508
509
510
511 if (is_ipv6_mask_nonzero(mask->ipv6_src)) {
512 __be32 *saddr = (__be32 *)&nh->saddr;
513 __be32 masked[4];
514
515 mask_ipv6_addr(saddr, key->ipv6_src, mask->ipv6_src, masked);
516
517 if (unlikely(memcmp(saddr, masked, sizeof(masked)))) {
518 set_ipv6_addr(skb, flow_key->ip.proto, saddr, masked,
519 true);
520 memcpy(&flow_key->ipv6.addr.src, masked,
521 sizeof(flow_key->ipv6.addr.src));
522 }
523 }
524 if (is_ipv6_mask_nonzero(mask->ipv6_dst)) {
525 unsigned int offset = 0;
526 int flags = IP6_FH_F_SKIP_RH;
527 bool recalc_csum = true;
528 __be32 *daddr = (__be32 *)&nh->daddr;
529 __be32 masked[4];
530
531 mask_ipv6_addr(daddr, key->ipv6_dst, mask->ipv6_dst, masked);
532
533 if (unlikely(memcmp(daddr, masked, sizeof(masked)))) {
534 if (ipv6_ext_hdr(nh->nexthdr))
535 recalc_csum = (ipv6_find_hdr(skb, &offset,
536 NEXTHDR_ROUTING,
537 NULL, &flags)
538 != NEXTHDR_ROUTING);
539
540 set_ipv6_addr(skb, flow_key->ip.proto, daddr, masked,
541 recalc_csum);
542 memcpy(&flow_key->ipv6.addr.dst, masked,
543 sizeof(flow_key->ipv6.addr.dst));
544 }
545 }
546 if (mask->ipv6_tclass) {
547 ipv6_change_dsfield(nh, ~mask->ipv6_tclass, key->ipv6_tclass);
548 flow_key->ip.tos = ipv6_get_dsfield(nh);
549 }
550 if (mask->ipv6_label) {
551 set_ipv6_fl(nh, ntohl(key->ipv6_label),
552 ntohl(mask->ipv6_label));
553 flow_key->ipv6.label =
554 *(__be32 *)nh & htonl(IPV6_FLOWINFO_FLOWLABEL);
555 }
556 if (mask->ipv6_hlimit) {
557 OVS_SET_MASKED(nh->hop_limit, key->ipv6_hlimit,
558 mask->ipv6_hlimit);
559 flow_key->ip.ttl = nh->hop_limit;
560 }
561 return 0;
562}
563
564static int set_nsh(struct sk_buff *skb, struct sw_flow_key *flow_key,
565 const struct nlattr *a)
566{
567 struct nshhdr *nh;
568 size_t length;
569 int err;
570 u8 flags;
571 u8 ttl;
572 int i;
573
574 struct ovs_key_nsh key;
575 struct ovs_key_nsh mask;
576
577 err = nsh_key_from_nlattr(a, &key, &mask);
578 if (err)
579 return err;
580
581
582 if (!pskb_may_pull(skb, skb_network_offset(skb) + NSH_BASE_HDR_LEN))
583 return -ENOMEM;
584
585 nh = nsh_hdr(skb);
586 length = nsh_hdr_len(nh);
587
588
589 err = skb_ensure_writable(skb, skb_network_offset(skb) +
590 length);
591 if (unlikely(err))
592 return err;
593
594 nh = nsh_hdr(skb);
595 skb_postpull_rcsum(skb, nh, length);
596 flags = nsh_get_flags(nh);
597 flags = OVS_MASKED(flags, key.base.flags, mask.base.flags);
598 flow_key->nsh.base.flags = flags;
599 ttl = nsh_get_ttl(nh);
600 ttl = OVS_MASKED(ttl, key.base.ttl, mask.base.ttl);
601 flow_key->nsh.base.ttl = ttl;
602 nsh_set_flags_and_ttl(nh, flags, ttl);
603 nh->path_hdr = OVS_MASKED(nh->path_hdr, key.base.path_hdr,
604 mask.base.path_hdr);
605 flow_key->nsh.base.path_hdr = nh->path_hdr;
606 switch (nh->mdtype) {
607 case NSH_M_TYPE1:
608 for (i = 0; i < NSH_MD1_CONTEXT_SIZE; i++) {
609 nh->md1.context[i] =
610 OVS_MASKED(nh->md1.context[i], key.context[i],
611 mask.context[i]);
612 }
613 memcpy(flow_key->nsh.context, nh->md1.context,
614 sizeof(nh->md1.context));
615 break;
616 case NSH_M_TYPE2:
617 memset(flow_key->nsh.context, 0,
618 sizeof(flow_key->nsh.context));
619 break;
620 default:
621 return -EINVAL;
622 }
623 skb_postpush_rcsum(skb, nh, length);
624 return 0;
625}
626
627
628static void set_tp_port(struct sk_buff *skb, __be16 *port,
629 __be16 new_port, __sum16 *check)
630{
631 inet_proto_csum_replace2(check, skb, *port, new_port, false);
632 *port = new_port;
633}
634
635static int set_udp(struct sk_buff *skb, struct sw_flow_key *flow_key,
636 const struct ovs_key_udp *key,
637 const struct ovs_key_udp *mask)
638{
639 struct udphdr *uh;
640 __be16 src, dst;
641 int err;
642
643 err = skb_ensure_writable(skb, skb_transport_offset(skb) +
644 sizeof(struct udphdr));
645 if (unlikely(err))
646 return err;
647
648 uh = udp_hdr(skb);
649
650 src = OVS_MASKED(uh->source, key->udp_src, mask->udp_src);
651 dst = OVS_MASKED(uh->dest, key->udp_dst, mask->udp_dst);
652
653 if (uh->check && skb->ip_summed != CHECKSUM_PARTIAL) {
654 if (likely(src != uh->source)) {
655 set_tp_port(skb, &uh->source, src, &uh->check);
656 flow_key->tp.src = src;
657 }
658 if (likely(dst != uh->dest)) {
659 set_tp_port(skb, &uh->dest, dst, &uh->check);
660 flow_key->tp.dst = dst;
661 }
662
663 if (unlikely(!uh->check))
664 uh->check = CSUM_MANGLED_0;
665 } else {
666 uh->source = src;
667 uh->dest = dst;
668 flow_key->tp.src = src;
669 flow_key->tp.dst = dst;
670 }
671
672 skb_clear_hash(skb);
673
674 return 0;
675}
676
677static int set_tcp(struct sk_buff *skb, struct sw_flow_key *flow_key,
678 const struct ovs_key_tcp *key,
679 const struct ovs_key_tcp *mask)
680{
681 struct tcphdr *th;
682 __be16 src, dst;
683 int err;
684
685 err = skb_ensure_writable(skb, skb_transport_offset(skb) +
686 sizeof(struct tcphdr));
687 if (unlikely(err))
688 return err;
689
690 th = tcp_hdr(skb);
691 src = OVS_MASKED(th->source, key->tcp_src, mask->tcp_src);
692 if (likely(src != th->source)) {
693 set_tp_port(skb, &th->source, src, &th->check);
694 flow_key->tp.src = src;
695 }
696 dst = OVS_MASKED(th->dest, key->tcp_dst, mask->tcp_dst);
697 if (likely(dst != th->dest)) {
698 set_tp_port(skb, &th->dest, dst, &th->check);
699 flow_key->tp.dst = dst;
700 }
701 skb_clear_hash(skb);
702
703 return 0;
704}
705
706static int set_sctp(struct sk_buff *skb, struct sw_flow_key *flow_key,
707 const struct ovs_key_sctp *key,
708 const struct ovs_key_sctp *mask)
709{
710 unsigned int sctphoff = skb_transport_offset(skb);
711 struct sctphdr *sh;
712 __le32 old_correct_csum, new_csum, old_csum;
713 int err;
714
715 err = skb_ensure_writable(skb, sctphoff + sizeof(struct sctphdr));
716 if (unlikely(err))
717 return err;
718
719 sh = sctp_hdr(skb);
720 old_csum = sh->checksum;
721 old_correct_csum = sctp_compute_cksum(skb, sctphoff);
722
723 sh->source = OVS_MASKED(sh->source, key->sctp_src, mask->sctp_src);
724 sh->dest = OVS_MASKED(sh->dest, key->sctp_dst, mask->sctp_dst);
725
726 new_csum = sctp_compute_cksum(skb, sctphoff);
727
728
729 sh->checksum = old_csum ^ old_correct_csum ^ new_csum;
730
731 skb_clear_hash(skb);
732 flow_key->tp.src = sh->source;
733 flow_key->tp.dst = sh->dest;
734
735 return 0;
736}
737
738static int ovs_vport_output(struct net *net, struct sock *sk, struct sk_buff *skb)
739{
740 struct ovs_frag_data *data = this_cpu_ptr(&ovs_frag_data_storage);
741 struct vport *vport = data->vport;
742
743 if (skb_cow_head(skb, data->l2_len) < 0) {
744 kfree_skb(skb);
745 return -ENOMEM;
746 }
747
748 __skb_dst_copy(skb, data->dst);
749 *OVS_CB(skb) = data->cb;
750 skb->inner_protocol = data->inner_protocol;
751 if (data->vlan_tci & VLAN_CFI_MASK)
752 __vlan_hwaccel_put_tag(skb, data->vlan_proto, data->vlan_tci & ~VLAN_CFI_MASK);
753 else
754 __vlan_hwaccel_clear_tag(skb);
755
756
757 skb_push(skb, data->l2_len);
758 memcpy(skb->data, &data->l2_data, data->l2_len);
759 skb_postpush_rcsum(skb, skb->data, data->l2_len);
760 skb_reset_mac_header(skb);
761
762 if (eth_p_mpls(skb->protocol)) {
763 skb->inner_network_header = skb->network_header;
764 skb_set_network_header(skb, data->network_offset);
765 skb_reset_mac_len(skb);
766 }
767
768 ovs_vport_send(vport, skb, data->mac_proto);
769 return 0;
770}
771
772static unsigned int
773ovs_dst_get_mtu(const struct dst_entry *dst)
774{
775 return dst->dev->mtu;
776}
777
778static struct dst_ops ovs_dst_ops = {
779 .family = AF_UNSPEC,
780 .mtu = ovs_dst_get_mtu,
781};
782
783
784
785
786static void prepare_frag(struct vport *vport, struct sk_buff *skb,
787 u16 orig_network_offset, u8 mac_proto)
788{
789 unsigned int hlen = skb_network_offset(skb);
790 struct ovs_frag_data *data;
791
792 data = this_cpu_ptr(&ovs_frag_data_storage);
793 data->dst = skb->_skb_refdst;
794 data->vport = vport;
795 data->cb = *OVS_CB(skb);
796 data->inner_protocol = skb->inner_protocol;
797 data->network_offset = orig_network_offset;
798 if (skb_vlan_tag_present(skb))
799 data->vlan_tci = skb_vlan_tag_get(skb) | VLAN_CFI_MASK;
800 else
801 data->vlan_tci = 0;
802 data->vlan_proto = skb->vlan_proto;
803 data->mac_proto = mac_proto;
804 data->l2_len = hlen;
805 memcpy(&data->l2_data, skb->data, hlen);
806
807 memset(IPCB(skb), 0, sizeof(struct inet_skb_parm));
808 skb_pull(skb, hlen);
809}
810
811static void ovs_fragment(struct net *net, struct vport *vport,
812 struct sk_buff *skb, u16 mru,
813 struct sw_flow_key *key)
814{
815 u16 orig_network_offset = 0;
816
817 if (eth_p_mpls(skb->protocol)) {
818 orig_network_offset = skb_network_offset(skb);
819 skb->network_header = skb->inner_network_header;
820 }
821
822 if (skb_network_offset(skb) > MAX_L2_LEN) {
823 OVS_NLERR(1, "L2 header too long to fragment");
824 goto err;
825 }
826
827 if (key->eth.type == htons(ETH_P_IP)) {
828 struct dst_entry ovs_dst;
829 unsigned long orig_dst;
830
831 prepare_frag(vport, skb, orig_network_offset,
832 ovs_key_mac_proto(key));
833 dst_init(&ovs_dst, &ovs_dst_ops, NULL, 1,
834 DST_OBSOLETE_NONE, DST_NOCOUNT);
835 ovs_dst.dev = vport->dev;
836
837 orig_dst = skb->_skb_refdst;
838 skb_dst_set_noref(skb, &ovs_dst);
839 IPCB(skb)->frag_max_size = mru;
840
841 ip_do_fragment(net, skb->sk, skb, ovs_vport_output);
842 refdst_drop(orig_dst);
843 } else if (key->eth.type == htons(ETH_P_IPV6)) {
844 const struct nf_ipv6_ops *v6ops = nf_get_ipv6_ops();
845 unsigned long orig_dst;
846 struct rt6_info ovs_rt;
847
848 if (!v6ops)
849 goto err;
850
851 prepare_frag(vport, skb, orig_network_offset,
852 ovs_key_mac_proto(key));
853 memset(&ovs_rt, 0, sizeof(ovs_rt));
854 dst_init(&ovs_rt.dst, &ovs_dst_ops, NULL, 1,
855 DST_OBSOLETE_NONE, DST_NOCOUNT);
856 ovs_rt.dst.dev = vport->dev;
857
858 orig_dst = skb->_skb_refdst;
859 skb_dst_set_noref(skb, &ovs_rt.dst);
860 IP6CB(skb)->frag_max_size = mru;
861
862 v6ops->fragment(net, skb->sk, skb, ovs_vport_output);
863 refdst_drop(orig_dst);
864 } else {
865 WARN_ONCE(1, "Failed fragment ->%s: eth=%04x, MRU=%d, MTU=%d.",
866 ovs_vport_name(vport), ntohs(key->eth.type), mru,
867 vport->dev->mtu);
868 goto err;
869 }
870
871 return;
872err:
873 kfree_skb(skb);
874}
875
876static void do_output(struct datapath *dp, struct sk_buff *skb, int out_port,
877 struct sw_flow_key *key)
878{
879 struct vport *vport = ovs_vport_rcu(dp, out_port);
880
881 if (likely(vport)) {
882 u16 mru = OVS_CB(skb)->mru;
883 u32 cutlen = OVS_CB(skb)->cutlen;
884
885 if (unlikely(cutlen > 0)) {
886 if (skb->len - cutlen > ovs_mac_header_len(key))
887 pskb_trim(skb, skb->len - cutlen);
888 else
889 pskb_trim(skb, ovs_mac_header_len(key));
890 }
891
892 if (likely(!mru ||
893 (skb->len <= mru + vport->dev->hard_header_len))) {
894 ovs_vport_send(vport, skb, ovs_key_mac_proto(key));
895 } else if (mru <= vport->dev->mtu) {
896 struct net *net = read_pnet(&dp->net);
897
898 ovs_fragment(net, vport, skb, mru, key);
899 } else {
900 kfree_skb(skb);
901 }
902 } else {
903 kfree_skb(skb);
904 }
905}
906
907static int output_userspace(struct datapath *dp, struct sk_buff *skb,
908 struct sw_flow_key *key, const struct nlattr *attr,
909 const struct nlattr *actions, int actions_len,
910 uint32_t cutlen)
911{
912 struct dp_upcall_info upcall;
913 const struct nlattr *a;
914 int rem;
915
916 memset(&upcall, 0, sizeof(upcall));
917 upcall.cmd = OVS_PACKET_CMD_ACTION;
918 upcall.mru = OVS_CB(skb)->mru;
919
920 for (a = nla_data(attr), rem = nla_len(attr); rem > 0;
921 a = nla_next(a, &rem)) {
922 switch (nla_type(a)) {
923 case OVS_USERSPACE_ATTR_USERDATA:
924 upcall.userdata = a;
925 break;
926
927 case OVS_USERSPACE_ATTR_PID:
928 upcall.portid = nla_get_u32(a);
929 break;
930
931 case OVS_USERSPACE_ATTR_EGRESS_TUN_PORT: {
932
933 struct vport *vport;
934
935 vport = ovs_vport_rcu(dp, nla_get_u32(a));
936 if (vport) {
937 int err;
938
939 err = dev_fill_metadata_dst(vport->dev, skb);
940 if (!err)
941 upcall.egress_tun_info = skb_tunnel_info(skb);
942 }
943
944 break;
945 }
946
947 case OVS_USERSPACE_ATTR_ACTIONS: {
948
949 upcall.actions = actions;
950 upcall.actions_len = actions_len;
951 break;
952 }
953
954 }
955 }
956
957 return ovs_dp_upcall(dp, skb, key, &upcall, cutlen);
958}
959
960
961
962
963
964static int sample(struct datapath *dp, struct sk_buff *skb,
965 struct sw_flow_key *key, const struct nlattr *attr,
966 bool last)
967{
968 struct nlattr *actions;
969 struct nlattr *sample_arg;
970 int rem = nla_len(attr);
971 const struct sample_arg *arg;
972 bool clone_flow_key;
973
974
975 sample_arg = nla_data(attr);
976 arg = nla_data(sample_arg);
977 actions = nla_next(sample_arg, &rem);
978
979 if ((arg->probability != U32_MAX) &&
980 (!arg->probability || prandom_u32() > arg->probability)) {
981 if (last)
982 consume_skb(skb);
983 return 0;
984 }
985
986 clone_flow_key = !arg->exec;
987 return clone_execute(dp, skb, key, 0, actions, rem, last,
988 clone_flow_key);
989}
990
991
992
993
994
995static int clone(struct datapath *dp, struct sk_buff *skb,
996 struct sw_flow_key *key, const struct nlattr *attr,
997 bool last)
998{
999 struct nlattr *actions;
1000 struct nlattr *clone_arg;
1001 int rem = nla_len(attr);
1002 bool dont_clone_flow_key;
1003
1004
1005 clone_arg = nla_data(attr);
1006 dont_clone_flow_key = nla_get_u32(clone_arg);
1007 actions = nla_next(clone_arg, &rem);
1008
1009 return clone_execute(dp, skb, key, 0, actions, rem, last,
1010 !dont_clone_flow_key);
1011}
1012
1013static void execute_hash(struct sk_buff *skb, struct sw_flow_key *key,
1014 const struct nlattr *attr)
1015{
1016 struct ovs_action_hash *hash_act = nla_data(attr);
1017 u32 hash = 0;
1018
1019
1020 hash = skb_get_hash(skb);
1021 hash = jhash_1word(hash, hash_act->hash_basis);
1022 if (!hash)
1023 hash = 0x1;
1024
1025 key->ovs_flow_hash = hash;
1026}
1027
1028static int execute_set_action(struct sk_buff *skb,
1029 struct sw_flow_key *flow_key,
1030 const struct nlattr *a)
1031{
1032
1033 if (nla_type(a) == OVS_KEY_ATTR_TUNNEL_INFO) {
1034 struct ovs_tunnel_info *tun = nla_data(a);
1035
1036 skb_dst_drop(skb);
1037 dst_hold((struct dst_entry *)tun->tun_dst);
1038 skb_dst_set(skb, (struct dst_entry *)tun->tun_dst);
1039 return 0;
1040 }
1041
1042 return -EINVAL;
1043}
1044
1045
1046#define get_mask(a, type) ((const type)nla_data(a) + 1)
1047
1048static int execute_masked_set_action(struct sk_buff *skb,
1049 struct sw_flow_key *flow_key,
1050 const struct nlattr *a)
1051{
1052 int err = 0;
1053
1054 switch (nla_type(a)) {
1055 case OVS_KEY_ATTR_PRIORITY:
1056 OVS_SET_MASKED(skb->priority, nla_get_u32(a),
1057 *get_mask(a, u32 *));
1058 flow_key->phy.priority = skb->priority;
1059 break;
1060
1061 case OVS_KEY_ATTR_SKB_MARK:
1062 OVS_SET_MASKED(skb->mark, nla_get_u32(a), *get_mask(a, u32 *));
1063 flow_key->phy.skb_mark = skb->mark;
1064 break;
1065
1066 case OVS_KEY_ATTR_TUNNEL_INFO:
1067
1068 err = -EINVAL;
1069 break;
1070
1071 case OVS_KEY_ATTR_ETHERNET:
1072 err = set_eth_addr(skb, flow_key, nla_data(a),
1073 get_mask(a, struct ovs_key_ethernet *));
1074 break;
1075
1076 case OVS_KEY_ATTR_NSH:
1077 err = set_nsh(skb, flow_key, a);
1078 break;
1079
1080 case OVS_KEY_ATTR_IPV4:
1081 err = set_ipv4(skb, flow_key, nla_data(a),
1082 get_mask(a, struct ovs_key_ipv4 *));
1083 break;
1084
1085 case OVS_KEY_ATTR_IPV6:
1086 err = set_ipv6(skb, flow_key, nla_data(a),
1087 get_mask(a, struct ovs_key_ipv6 *));
1088 break;
1089
1090 case OVS_KEY_ATTR_TCP:
1091 err = set_tcp(skb, flow_key, nla_data(a),
1092 get_mask(a, struct ovs_key_tcp *));
1093 break;
1094
1095 case OVS_KEY_ATTR_UDP:
1096 err = set_udp(skb, flow_key, nla_data(a),
1097 get_mask(a, struct ovs_key_udp *));
1098 break;
1099
1100 case OVS_KEY_ATTR_SCTP:
1101 err = set_sctp(skb, flow_key, nla_data(a),
1102 get_mask(a, struct ovs_key_sctp *));
1103 break;
1104
1105 case OVS_KEY_ATTR_MPLS:
1106 err = set_mpls(skb, flow_key, nla_data(a), get_mask(a,
1107 __be32 *));
1108 break;
1109
1110 case OVS_KEY_ATTR_CT_STATE:
1111 case OVS_KEY_ATTR_CT_ZONE:
1112 case OVS_KEY_ATTR_CT_MARK:
1113 case OVS_KEY_ATTR_CT_LABELS:
1114 case OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4:
1115 case OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6:
1116 err = -EINVAL;
1117 break;
1118 }
1119
1120 return err;
1121}
1122
1123static int execute_recirc(struct datapath *dp, struct sk_buff *skb,
1124 struct sw_flow_key *key,
1125 const struct nlattr *a, bool last)
1126{
1127 u32 recirc_id;
1128
1129 if (!is_flow_key_valid(key)) {
1130 int err;
1131
1132 err = ovs_flow_key_update(skb, key);
1133 if (err)
1134 return err;
1135 }
1136 BUG_ON(!is_flow_key_valid(key));
1137
1138 recirc_id = nla_get_u32(a);
1139 return clone_execute(dp, skb, key, recirc_id, NULL, 0, last, true);
1140}
1141
1142static int execute_check_pkt_len(struct datapath *dp, struct sk_buff *skb,
1143 struct sw_flow_key *key,
1144 const struct nlattr *attr, bool last)
1145{
1146 const struct nlattr *actions, *cpl_arg;
1147 const struct check_pkt_len_arg *arg;
1148 int rem = nla_len(attr);
1149 bool clone_flow_key;
1150
1151
1152
1153
1154 cpl_arg = nla_data(attr);
1155 arg = nla_data(cpl_arg);
1156
1157 if (skb->len <= arg->pkt_len) {
1158
1159
1160
1161 actions = nla_next(cpl_arg, &rem);
1162 clone_flow_key = !arg->exec_for_lesser_equal;
1163 } else {
1164
1165
1166
1167 actions = nla_next(cpl_arg, &rem);
1168 actions = nla_next(actions, &rem);
1169 clone_flow_key = !arg->exec_for_greater;
1170 }
1171
1172 return clone_execute(dp, skb, key, 0, nla_data(actions),
1173 nla_len(actions), last, clone_flow_key);
1174}
1175
1176
1177static int do_execute_actions(struct datapath *dp, struct sk_buff *skb,
1178 struct sw_flow_key *key,
1179 const struct nlattr *attr, int len)
1180{
1181 const struct nlattr *a;
1182 int rem;
1183
1184 for (a = attr, rem = len; rem > 0;
1185 a = nla_next(a, &rem)) {
1186 int err = 0;
1187
1188 switch (nla_type(a)) {
1189 case OVS_ACTION_ATTR_OUTPUT: {
1190 int port = nla_get_u32(a);
1191 struct sk_buff *clone;
1192
1193
1194
1195
1196
1197 if (nla_is_last(a, rem)) {
1198 do_output(dp, skb, port, key);
1199
1200
1201 return 0;
1202 }
1203
1204 clone = skb_clone(skb, GFP_ATOMIC);
1205 if (clone)
1206 do_output(dp, clone, port, key);
1207 OVS_CB(skb)->cutlen = 0;
1208 break;
1209 }
1210
1211 case OVS_ACTION_ATTR_TRUNC: {
1212 struct ovs_action_trunc *trunc = nla_data(a);
1213
1214 if (skb->len > trunc->max_len)
1215 OVS_CB(skb)->cutlen = skb->len - trunc->max_len;
1216 break;
1217 }
1218
1219 case OVS_ACTION_ATTR_USERSPACE:
1220 output_userspace(dp, skb, key, a, attr,
1221 len, OVS_CB(skb)->cutlen);
1222 OVS_CB(skb)->cutlen = 0;
1223 break;
1224
1225 case OVS_ACTION_ATTR_HASH:
1226 execute_hash(skb, key, a);
1227 break;
1228
1229 case OVS_ACTION_ATTR_PUSH_MPLS:
1230 err = push_mpls(skb, key, nla_data(a));
1231 break;
1232
1233 case OVS_ACTION_ATTR_POP_MPLS:
1234 err = pop_mpls(skb, key, nla_get_be16(a));
1235 break;
1236
1237 case OVS_ACTION_ATTR_PUSH_VLAN:
1238 err = push_vlan(skb, key, nla_data(a));
1239 break;
1240
1241 case OVS_ACTION_ATTR_POP_VLAN:
1242 err = pop_vlan(skb, key);
1243 break;
1244
1245 case OVS_ACTION_ATTR_RECIRC: {
1246 bool last = nla_is_last(a, rem);
1247
1248 err = execute_recirc(dp, skb, key, a, last);
1249 if (last) {
1250
1251
1252
1253
1254 return err;
1255 }
1256 break;
1257 }
1258
1259 case OVS_ACTION_ATTR_SET:
1260 err = execute_set_action(skb, key, nla_data(a));
1261 break;
1262
1263 case OVS_ACTION_ATTR_SET_MASKED:
1264 case OVS_ACTION_ATTR_SET_TO_MASKED:
1265 err = execute_masked_set_action(skb, key, nla_data(a));
1266 break;
1267
1268 case OVS_ACTION_ATTR_SAMPLE: {
1269 bool last = nla_is_last(a, rem);
1270
1271 err = sample(dp, skb, key, a, last);
1272 if (last)
1273 return err;
1274
1275 break;
1276 }
1277
1278 case OVS_ACTION_ATTR_CT:
1279 if (!is_flow_key_valid(key)) {
1280 err = ovs_flow_key_update(skb, key);
1281 if (err)
1282 return err;
1283 }
1284
1285 err = ovs_ct_execute(ovs_dp_get_net(dp), skb, key,
1286 nla_data(a));
1287
1288
1289 if (err)
1290 return err == -EINPROGRESS ? 0 : err;
1291 break;
1292
1293 case OVS_ACTION_ATTR_CT_CLEAR:
1294 err = ovs_ct_clear(skb, key);
1295 break;
1296
1297 case OVS_ACTION_ATTR_PUSH_ETH:
1298 err = push_eth(skb, key, nla_data(a));
1299 break;
1300
1301 case OVS_ACTION_ATTR_POP_ETH:
1302 err = pop_eth(skb, key);
1303 break;
1304
1305 case OVS_ACTION_ATTR_PUSH_NSH: {
1306 u8 buffer[NSH_HDR_MAX_LEN];
1307 struct nshhdr *nh = (struct nshhdr *)buffer;
1308
1309 err = nsh_hdr_from_nlattr(nla_data(a), nh,
1310 NSH_HDR_MAX_LEN);
1311 if (unlikely(err))
1312 break;
1313 err = push_nsh(skb, key, nh);
1314 break;
1315 }
1316
1317 case OVS_ACTION_ATTR_POP_NSH:
1318 err = pop_nsh(skb, key);
1319 break;
1320
1321 case OVS_ACTION_ATTR_METER:
1322 if (ovs_meter_execute(dp, skb, key, nla_get_u32(a))) {
1323 consume_skb(skb);
1324 return 0;
1325 }
1326 break;
1327
1328 case OVS_ACTION_ATTR_CLONE: {
1329 bool last = nla_is_last(a, rem);
1330
1331 err = clone(dp, skb, key, a, last);
1332 if (last)
1333 return err;
1334
1335 break;
1336 }
1337
1338 case OVS_ACTION_ATTR_CHECK_PKT_LEN: {
1339 bool last = nla_is_last(a, rem);
1340
1341 err = execute_check_pkt_len(dp, skb, key, a, last);
1342 if (last)
1343 return err;
1344
1345 break;
1346 }
1347 }
1348
1349 if (unlikely(err)) {
1350 kfree_skb(skb);
1351 return err;
1352 }
1353 }
1354
1355 consume_skb(skb);
1356 return 0;
1357}
1358
1359
1360
1361
1362
1363
1364
1365static int clone_execute(struct datapath *dp, struct sk_buff *skb,
1366 struct sw_flow_key *key, u32 recirc_id,
1367 const struct nlattr *actions, int len,
1368 bool last, bool clone_flow_key)
1369{
1370 struct deferred_action *da;
1371 struct sw_flow_key *clone;
1372
1373 skb = last ? skb : skb_clone(skb, GFP_ATOMIC);
1374 if (!skb) {
1375
1376
1377 return 0;
1378 }
1379
1380
1381
1382
1383
1384
1385
1386 clone = clone_flow_key ? clone_key(key) : key;
1387 if (clone) {
1388 int err = 0;
1389
1390 if (actions) {
1391 if (clone_flow_key)
1392 __this_cpu_inc(exec_actions_level);
1393
1394 err = do_execute_actions(dp, skb, clone,
1395 actions, len);
1396
1397 if (clone_flow_key)
1398 __this_cpu_dec(exec_actions_level);
1399 } else {
1400 clone->recirc_id = recirc_id;
1401 ovs_dp_process_packet(skb, clone);
1402 }
1403 return err;
1404 }
1405
1406
1407 da = add_deferred_actions(skb, key, actions, len);
1408 if (da) {
1409 if (!actions) {
1410 key = &da->pkt_key;
1411 key->recirc_id = recirc_id;
1412 }
1413 } else {
1414
1415
1416
1417 kfree_skb(skb);
1418
1419 if (net_ratelimit()) {
1420 if (actions) {
1421 pr_warn("%s: deferred action limit reached, drop sample action\n",
1422 ovs_dp_name(dp));
1423 } else {
1424 pr_warn("%s: deferred action limit reached, drop recirc action\n",
1425 ovs_dp_name(dp));
1426 }
1427 }
1428 }
1429 return 0;
1430}
1431
1432static void process_deferred_actions(struct datapath *dp)
1433{
1434 struct action_fifo *fifo = this_cpu_ptr(action_fifos);
1435
1436
1437 if (action_fifo_is_empty(fifo))
1438 return;
1439
1440
1441 do {
1442 struct deferred_action *da = action_fifo_get(fifo);
1443 struct sk_buff *skb = da->skb;
1444 struct sw_flow_key *key = &da->pkt_key;
1445 const struct nlattr *actions = da->actions;
1446 int actions_len = da->actions_len;
1447
1448 if (actions)
1449 do_execute_actions(dp, skb, key, actions, actions_len);
1450 else
1451 ovs_dp_process_packet(skb, key);
1452 } while (!action_fifo_is_empty(fifo));
1453
1454
1455 action_fifo_init(fifo);
1456}
1457
1458
1459int ovs_execute_actions(struct datapath *dp, struct sk_buff *skb,
1460 const struct sw_flow_actions *acts,
1461 struct sw_flow_key *key)
1462{
1463 int err, level;
1464
1465 level = __this_cpu_inc_return(exec_actions_level);
1466 if (unlikely(level > OVS_RECURSION_LIMIT)) {
1467 net_crit_ratelimited("ovs: recursion limit reached on datapath %s, probable configuration error\n",
1468 ovs_dp_name(dp));
1469 kfree_skb(skb);
1470 err = -ENETDOWN;
1471 goto out;
1472 }
1473
1474 OVS_CB(skb)->acts_origlen = acts->orig_len;
1475 err = do_execute_actions(dp, skb, key,
1476 acts->actions, acts->actions_len);
1477
1478 if (level == 1)
1479 process_deferred_actions(dp);
1480
1481out:
1482 __this_cpu_dec(exec_actions_level);
1483 return err;
1484}
1485
1486int action_fifos_init(void)
1487{
1488 action_fifos = alloc_percpu(struct action_fifo);
1489 if (!action_fifos)
1490 return -ENOMEM;
1491
1492 flow_keys = alloc_percpu(struct action_flow_keys);
1493 if (!flow_keys) {
1494 free_percpu(action_fifos);
1495 return -ENOMEM;
1496 }
1497
1498 return 0;
1499}
1500
1501void action_fifos_exit(void)
1502{
1503 free_percpu(action_fifos);
1504 free_percpu(flow_keys);
1505}
1506