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ccb1352e | 1 | /* |
4572ef52 | 2 | * Copyright (c) 2007-2017 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> | |
7f8a436e | 25 | #include <linux/netfilter_ipv6.h> |
a175a723 | 26 | #include <linux/sctp.h> |
ccb1352e JG |
27 | #include <linux/tcp.h> |
28 | #include <linux/udp.h> | |
29 | #include <linux/in6.h> | |
30 | #include <linux/if_arp.h> | |
31 | #include <linux/if_vlan.h> | |
25cd9ba0 | 32 | |
7f8a436e | 33 | #include <net/dst.h> |
ccb1352e | 34 | #include <net/ip.h> |
3fdbd1ce | 35 | #include <net/ipv6.h> |
7b85b4df | 36 | #include <net/ip6_fib.h> |
ccb1352e JG |
37 | #include <net/checksum.h> |
38 | #include <net/dsfield.h> | |
25cd9ba0 | 39 | #include <net/mpls.h> |
a175a723 | 40 | #include <net/sctp/checksum.h> |
ccb1352e JG |
41 | |
42 | #include "datapath.h" | |
971427f3 | 43 | #include "flow.h" |
7f8a436e | 44 | #include "conntrack.h" |
ccb1352e | 45 | #include "vport.h" |
b2d0f5d5 | 46 | #include "flow_netlink.h" |
ccb1352e | 47 | |
971427f3 AZ |
48 | struct deferred_action { |
49 | struct sk_buff *skb; | |
50 | const struct nlattr *actions; | |
47c697aa | 51 | int actions_len; |
971427f3 AZ |
52 | |
53 | /* Store pkt_key clone when creating deferred action. */ | |
54 | struct sw_flow_key pkt_key; | |
55 | }; | |
56 | ||
7f8a436e JS |
57 | #define MAX_L2_LEN (VLAN_ETH_HLEN + 3 * MPLS_HLEN) |
58 | struct ovs_frag_data { | |
59 | unsigned long dst; | |
60 | struct vport *vport; | |
61 | struct ovs_skb_cb cb; | |
62 | __be16 inner_protocol; | |
c66549ff JB |
63 | u16 network_offset; /* valid only for MPLS */ |
64 | u16 vlan_tci; | |
7f8a436e JS |
65 | __be16 vlan_proto; |
66 | unsigned int l2_len; | |
e2d9d835 | 67 | u8 mac_proto; |
7f8a436e JS |
68 | u8 l2_data[MAX_L2_LEN]; |
69 | }; | |
70 | ||
71 | static DEFINE_PER_CPU(struct ovs_frag_data, ovs_frag_data_storage); | |
72 | ||
971427f3 | 73 | #define DEFERRED_ACTION_FIFO_SIZE 10 |
2679d040 LR |
74 | #define OVS_RECURSION_LIMIT 5 |
75 | #define OVS_DEFERRED_ACTION_THRESHOLD (OVS_RECURSION_LIMIT - 2) | |
971427f3 AZ |
76 | struct action_fifo { |
77 | int head; | |
78 | int tail; | |
79 | /* Deferred action fifo queue storage. */ | |
80 | struct deferred_action fifo[DEFERRED_ACTION_FIFO_SIZE]; | |
81 | }; | |
82 | ||
4572ef52 | 83 | struct action_flow_keys { |
2679d040 LR |
84 | struct sw_flow_key key[OVS_DEFERRED_ACTION_THRESHOLD]; |
85 | }; | |
86 | ||
971427f3 | 87 | static struct action_fifo __percpu *action_fifos; |
4572ef52 | 88 | static struct action_flow_keys __percpu *flow_keys; |
971427f3 AZ |
89 | static DEFINE_PER_CPU(int, exec_actions_level); |
90 | ||
4572ef52 | 91 | /* Make a clone of the 'key', using the pre-allocated percpu 'flow_keys' |
92 | * space. Return NULL if out of key spaces. | |
93 | */ | |
94 | static struct sw_flow_key *clone_key(const struct sw_flow_key *key_) | |
95 | { | |
96 | struct action_flow_keys *keys = this_cpu_ptr(flow_keys); | |
97 | int level = this_cpu_read(exec_actions_level); | |
98 | struct sw_flow_key *key = NULL; | |
99 | ||
100 | if (level <= OVS_DEFERRED_ACTION_THRESHOLD) { | |
101 | key = &keys->key[level - 1]; | |
102 | *key = *key_; | |
103 | } | |
104 | ||
105 | return key; | |
106 | } | |
107 | ||
971427f3 AZ |
108 | static void action_fifo_init(struct action_fifo *fifo) |
109 | { | |
110 | fifo->head = 0; | |
111 | fifo->tail = 0; | |
112 | } | |
113 | ||
12eb18f7 | 114 | static bool action_fifo_is_empty(const struct action_fifo *fifo) |
971427f3 AZ |
115 | { |
116 | return (fifo->head == fifo->tail); | |
117 | } | |
118 | ||
119 | static struct deferred_action *action_fifo_get(struct action_fifo *fifo) | |
120 | { | |
121 | if (action_fifo_is_empty(fifo)) | |
122 | return NULL; | |
123 | ||
124 | return &fifo->fifo[fifo->tail++]; | |
125 | } | |
126 | ||
127 | static struct deferred_action *action_fifo_put(struct action_fifo *fifo) | |
128 | { | |
129 | if (fifo->head >= DEFERRED_ACTION_FIFO_SIZE - 1) | |
130 | return NULL; | |
131 | ||
132 | return &fifo->fifo[fifo->head++]; | |
133 | } | |
134 | ||
135 | /* Return true if fifo is not full */ | |
136 | static struct deferred_action *add_deferred_actions(struct sk_buff *skb, | |
47c697aa | 137 | const struct sw_flow_key *key, |
138 | const struct nlattr *actions, | |
139 | const int actions_len) | |
971427f3 AZ |
140 | { |
141 | struct action_fifo *fifo; | |
142 | struct deferred_action *da; | |
143 | ||
144 | fifo = this_cpu_ptr(action_fifos); | |
145 | da = action_fifo_put(fifo); | |
146 | if (da) { | |
147 | da->skb = skb; | |
47c697aa | 148 | da->actions = actions; |
149 | da->actions_len = actions_len; | |
971427f3 AZ |
150 | da->pkt_key = *key; |
151 | } | |
152 | ||
153 | return da; | |
154 | } | |
155 | ||
fff06c36 PS |
156 | static void invalidate_flow_key(struct sw_flow_key *key) |
157 | { | |
329f45bc | 158 | key->mac_proto |= SW_FLOW_KEY_INVALID; |
fff06c36 PS |
159 | } |
160 | ||
161 | static bool is_flow_key_valid(const struct sw_flow_key *key) | |
162 | { | |
329f45bc | 163 | return !(key->mac_proto & SW_FLOW_KEY_INVALID); |
fff06c36 PS |
164 | } |
165 | ||
bef7f756 | 166 | static int clone_execute(struct datapath *dp, struct sk_buff *skb, |
167 | struct sw_flow_key *key, | |
168 | u32 recirc_id, | |
169 | const struct nlattr *actions, int len, | |
170 | bool last, bool clone_flow_key); | |
171 | ||
bc7cc599 SH |
172 | static void update_ethertype(struct sk_buff *skb, struct ethhdr *hdr, |
173 | __be16 ethertype) | |
174 | { | |
175 | if (skb->ip_summed == CHECKSUM_COMPLETE) { | |
176 | __be16 diff[] = { ~(hdr->h_proto), ethertype }; | |
177 | ||
178 | skb->csum = ~csum_partial((char *)diff, sizeof(diff), | |
179 | ~skb->csum); | |
180 | } | |
181 | ||
182 | hdr->h_proto = ethertype; | |
183 | } | |
184 | ||
fff06c36 | 185 | static int push_mpls(struct sk_buff *skb, struct sw_flow_key *key, |
25cd9ba0 SH |
186 | const struct ovs_action_push_mpls *mpls) |
187 | { | |
85de4a21 | 188 | struct mpls_shim_hdr *new_mpls_lse; |
25cd9ba0 SH |
189 | |
190 | /* Networking stack do not allow simultaneous Tunnel and MPLS GSO. */ | |
191 | if (skb->encapsulation) | |
192 | return -ENOTSUPP; | |
193 | ||
194 | if (skb_cow_head(skb, MPLS_HLEN) < 0) | |
195 | return -ENOMEM; | |
196 | ||
48d2ab60 DA |
197 | if (!skb->inner_protocol) { |
198 | skb_set_inner_network_header(skb, skb->mac_len); | |
199 | skb_set_inner_protocol(skb, skb->protocol); | |
200 | } | |
201 | ||
25cd9ba0 SH |
202 | skb_push(skb, MPLS_HLEN); |
203 | memmove(skb_mac_header(skb) - MPLS_HLEN, skb_mac_header(skb), | |
204 | skb->mac_len); | |
205 | skb_reset_mac_header(skb); | |
48d2ab60 | 206 | skb_set_network_header(skb, skb->mac_len); |
25cd9ba0 | 207 | |
85de4a21 JB |
208 | new_mpls_lse = mpls_hdr(skb); |
209 | new_mpls_lse->label_stack_entry = mpls->mpls_lse; | |
25cd9ba0 | 210 | |
6b83d28a | 211 | skb_postpush_rcsum(skb, new_mpls_lse, MPLS_HLEN); |
25cd9ba0 | 212 | |
1560a074 JB |
213 | if (ovs_key_mac_proto(key) == MAC_PROTO_ETHERNET) |
214 | update_ethertype(skb, eth_hdr(skb), mpls->mpls_ethertype); | |
25cd9ba0 SH |
215 | skb->protocol = mpls->mpls_ethertype; |
216 | ||
fff06c36 | 217 | invalidate_flow_key(key); |
25cd9ba0 SH |
218 | return 0; |
219 | } | |
220 | ||
fff06c36 PS |
221 | static int pop_mpls(struct sk_buff *skb, struct sw_flow_key *key, |
222 | const __be16 ethertype) | |
25cd9ba0 | 223 | { |
25cd9ba0 SH |
224 | int err; |
225 | ||
e2195121 | 226 | err = skb_ensure_writable(skb, skb->mac_len + MPLS_HLEN); |
25cd9ba0 SH |
227 | if (unlikely(err)) |
228 | return err; | |
229 | ||
85de4a21 | 230 | skb_postpull_rcsum(skb, mpls_hdr(skb), MPLS_HLEN); |
25cd9ba0 SH |
231 | |
232 | memmove(skb_mac_header(skb) + MPLS_HLEN, skb_mac_header(skb), | |
233 | skb->mac_len); | |
234 | ||
235 | __skb_pull(skb, MPLS_HLEN); | |
236 | skb_reset_mac_header(skb); | |
48d2ab60 | 237 | skb_set_network_header(skb, skb->mac_len); |
25cd9ba0 | 238 | |
1560a074 JB |
239 | if (ovs_key_mac_proto(key) == MAC_PROTO_ETHERNET) { |
240 | struct ethhdr *hdr; | |
241 | ||
242 | /* mpls_hdr() is used to locate the ethertype field correctly in the | |
243 | * presence of VLAN tags. | |
244 | */ | |
245 | hdr = (struct ethhdr *)((void *)mpls_hdr(skb) - ETH_HLEN); | |
246 | update_ethertype(skb, hdr, ethertype); | |
247 | } | |
25cd9ba0 SH |
248 | if (eth_p_mpls(skb->protocol)) |
249 | skb->protocol = ethertype; | |
fff06c36 PS |
250 | |
251 | invalidate_flow_key(key); | |
25cd9ba0 SH |
252 | return 0; |
253 | } | |
254 | ||
83d2b9ba JR |
255 | static int set_mpls(struct sk_buff *skb, struct sw_flow_key *flow_key, |
256 | const __be32 *mpls_lse, const __be32 *mask) | |
25cd9ba0 | 257 | { |
85de4a21 | 258 | struct mpls_shim_hdr *stack; |
83d2b9ba | 259 | __be32 lse; |
25cd9ba0 SH |
260 | int err; |
261 | ||
e2195121 | 262 | err = skb_ensure_writable(skb, skb->mac_len + MPLS_HLEN); |
25cd9ba0 SH |
263 | if (unlikely(err)) |
264 | return err; | |
265 | ||
85de4a21 JB |
266 | stack = mpls_hdr(skb); |
267 | lse = OVS_MASKED(stack->label_stack_entry, *mpls_lse, *mask); | |
25cd9ba0 | 268 | if (skb->ip_summed == CHECKSUM_COMPLETE) { |
85de4a21 | 269 | __be32 diff[] = { ~(stack->label_stack_entry), lse }; |
83d2b9ba | 270 | |
25cd9ba0 SH |
271 | skb->csum = ~csum_partial((char *)diff, sizeof(diff), |
272 | ~skb->csum); | |
273 | } | |
274 | ||
85de4a21 | 275 | stack->label_stack_entry = lse; |
83d2b9ba | 276 | flow_key->mpls.top_lse = lse; |
25cd9ba0 SH |
277 | return 0; |
278 | } | |
279 | ||
fff06c36 | 280 | static int pop_vlan(struct sk_buff *skb, struct sw_flow_key *key) |
ccb1352e | 281 | { |
ccb1352e JG |
282 | int err; |
283 | ||
93515d53 | 284 | err = skb_vlan_pop(skb); |
018c1dda | 285 | if (skb_vlan_tag_present(skb)) { |
93515d53 | 286 | invalidate_flow_key(key); |
018c1dda EG |
287 | } else { |
288 | key->eth.vlan.tci = 0; | |
289 | key->eth.vlan.tpid = 0; | |
290 | } | |
93515d53 | 291 | return err; |
ccb1352e JG |
292 | } |
293 | ||
fff06c36 PS |
294 | static int push_vlan(struct sk_buff *skb, struct sw_flow_key *key, |
295 | const struct ovs_action_push_vlan *vlan) | |
ccb1352e | 296 | { |
018c1dda | 297 | if (skb_vlan_tag_present(skb)) { |
fff06c36 | 298 | invalidate_flow_key(key); |
018c1dda EG |
299 | } else { |
300 | key->eth.vlan.tci = vlan->vlan_tci; | |
301 | key->eth.vlan.tpid = vlan->vlan_tpid; | |
302 | } | |
93515d53 JP |
303 | return skb_vlan_push(skb, vlan->vlan_tpid, |
304 | ntohs(vlan->vlan_tci) & ~VLAN_TAG_PRESENT); | |
ccb1352e JG |
305 | } |
306 | ||
83d2b9ba JR |
307 | /* 'src' is already properly masked. */ |
308 | static void ether_addr_copy_masked(u8 *dst_, const u8 *src_, const u8 *mask_) | |
309 | { | |
310 | u16 *dst = (u16 *)dst_; | |
311 | const u16 *src = (const u16 *)src_; | |
312 | const u16 *mask = (const u16 *)mask_; | |
313 | ||
be26b9a8 JS |
314 | OVS_SET_MASKED(dst[0], src[0], mask[0]); |
315 | OVS_SET_MASKED(dst[1], src[1], mask[1]); | |
316 | OVS_SET_MASKED(dst[2], src[2], mask[2]); | |
83d2b9ba JR |
317 | } |
318 | ||
319 | static int set_eth_addr(struct sk_buff *skb, struct sw_flow_key *flow_key, | |
320 | const struct ovs_key_ethernet *key, | |
321 | const struct ovs_key_ethernet *mask) | |
ccb1352e JG |
322 | { |
323 | int err; | |
83d2b9ba | 324 | |
e2195121 | 325 | err = skb_ensure_writable(skb, ETH_HLEN); |
ccb1352e JG |
326 | if (unlikely(err)) |
327 | return err; | |
328 | ||
b34df5e8 PS |
329 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_ALEN * 2); |
330 | ||
83d2b9ba JR |
331 | ether_addr_copy_masked(eth_hdr(skb)->h_source, key->eth_src, |
332 | mask->eth_src); | |
333 | ether_addr_copy_masked(eth_hdr(skb)->h_dest, key->eth_dst, | |
334 | mask->eth_dst); | |
ccb1352e | 335 | |
6b83d28a | 336 | skb_postpush_rcsum(skb, eth_hdr(skb), ETH_ALEN * 2); |
b34df5e8 | 337 | |
83d2b9ba JR |
338 | ether_addr_copy(flow_key->eth.src, eth_hdr(skb)->h_source); |
339 | ether_addr_copy(flow_key->eth.dst, eth_hdr(skb)->h_dest); | |
ccb1352e JG |
340 | return 0; |
341 | } | |
342 | ||
91820da6 JB |
343 | /* pop_eth does not support VLAN packets as this action is never called |
344 | * for them. | |
345 | */ | |
346 | static int pop_eth(struct sk_buff *skb, struct sw_flow_key *key) | |
347 | { | |
348 | skb_pull_rcsum(skb, ETH_HLEN); | |
349 | skb_reset_mac_header(skb); | |
350 | skb_reset_mac_len(skb); | |
351 | ||
352 | /* safe right before invalidate_flow_key */ | |
353 | key->mac_proto = MAC_PROTO_NONE; | |
354 | invalidate_flow_key(key); | |
355 | return 0; | |
356 | } | |
357 | ||
358 | static int push_eth(struct sk_buff *skb, struct sw_flow_key *key, | |
359 | const struct ovs_action_push_eth *ethh) | |
360 | { | |
361 | struct ethhdr *hdr; | |
362 | ||
363 | /* Add the new Ethernet header */ | |
364 | if (skb_cow_head(skb, ETH_HLEN) < 0) | |
365 | return -ENOMEM; | |
366 | ||
367 | skb_push(skb, ETH_HLEN); | |
368 | skb_reset_mac_header(skb); | |
369 | skb_reset_mac_len(skb); | |
370 | ||
371 | hdr = eth_hdr(skb); | |
372 | ether_addr_copy(hdr->h_source, ethh->addresses.eth_src); | |
373 | ether_addr_copy(hdr->h_dest, ethh->addresses.eth_dst); | |
374 | hdr->h_proto = skb->protocol; | |
375 | ||
376 | skb_postpush_rcsum(skb, hdr, ETH_HLEN); | |
377 | ||
378 | /* safe right before invalidate_flow_key */ | |
379 | key->mac_proto = MAC_PROTO_ETHERNET; | |
380 | invalidate_flow_key(key); | |
381 | return 0; | |
382 | } | |
383 | ||
b2d0f5d5 YY |
384 | static int push_nsh(struct sk_buff *skb, struct sw_flow_key *key, |
385 | const struct nshhdr *nh) | |
386 | { | |
387 | int err; | |
388 | ||
389 | err = nsh_push(skb, nh); | |
390 | if (err) | |
391 | return err; | |
392 | ||
393 | /* safe right before invalidate_flow_key */ | |
394 | key->mac_proto = MAC_PROTO_NONE; | |
395 | invalidate_flow_key(key); | |
396 | return 0; | |
397 | } | |
398 | ||
399 | static int pop_nsh(struct sk_buff *skb, struct sw_flow_key *key) | |
400 | { | |
401 | int err; | |
402 | ||
403 | err = nsh_pop(skb); | |
404 | if (err) | |
405 | return err; | |
406 | ||
407 | /* safe right before invalidate_flow_key */ | |
408 | if (skb->protocol == htons(ETH_P_TEB)) | |
409 | key->mac_proto = MAC_PROTO_ETHERNET; | |
410 | else | |
411 | key->mac_proto = MAC_PROTO_NONE; | |
412 | invalidate_flow_key(key); | |
413 | return 0; | |
414 | } | |
415 | ||
3576fd79 GG |
416 | static void update_ip_l4_checksum(struct sk_buff *skb, struct iphdr *nh, |
417 | __be32 addr, __be32 new_addr) | |
ccb1352e JG |
418 | { |
419 | int transport_len = skb->len - skb_transport_offset(skb); | |
420 | ||
3576fd79 GG |
421 | if (nh->frag_off & htons(IP_OFFSET)) |
422 | return; | |
423 | ||
ccb1352e JG |
424 | if (nh->protocol == IPPROTO_TCP) { |
425 | if (likely(transport_len >= sizeof(struct tcphdr))) | |
426 | inet_proto_csum_replace4(&tcp_hdr(skb)->check, skb, | |
4b048d6d | 427 | addr, new_addr, true); |
ccb1352e | 428 | } else if (nh->protocol == IPPROTO_UDP) { |
81e5d41d JG |
429 | if (likely(transport_len >= sizeof(struct udphdr))) { |
430 | struct udphdr *uh = udp_hdr(skb); | |
431 | ||
432 | if (uh->check || skb->ip_summed == CHECKSUM_PARTIAL) { | |
433 | inet_proto_csum_replace4(&uh->check, skb, | |
4b048d6d | 434 | addr, new_addr, true); |
81e5d41d JG |
435 | if (!uh->check) |
436 | uh->check = CSUM_MANGLED_0; | |
437 | } | |
438 | } | |
ccb1352e | 439 | } |
3576fd79 | 440 | } |
ccb1352e | 441 | |
3576fd79 GG |
442 | static void set_ip_addr(struct sk_buff *skb, struct iphdr *nh, |
443 | __be32 *addr, __be32 new_addr) | |
444 | { | |
445 | update_ip_l4_checksum(skb, nh, *addr, new_addr); | |
ccb1352e | 446 | csum_replace4(&nh->check, *addr, new_addr); |
7539fadc | 447 | skb_clear_hash(skb); |
ccb1352e JG |
448 | *addr = new_addr; |
449 | } | |
450 | ||
3fdbd1ce AA |
451 | static void update_ipv6_checksum(struct sk_buff *skb, u8 l4_proto, |
452 | __be32 addr[4], const __be32 new_addr[4]) | |
453 | { | |
454 | int transport_len = skb->len - skb_transport_offset(skb); | |
455 | ||
856447d0 | 456 | if (l4_proto == NEXTHDR_TCP) { |
3fdbd1ce AA |
457 | if (likely(transport_len >= sizeof(struct tcphdr))) |
458 | inet_proto_csum_replace16(&tcp_hdr(skb)->check, skb, | |
4b048d6d | 459 | addr, new_addr, true); |
856447d0 | 460 | } else if (l4_proto == NEXTHDR_UDP) { |
3fdbd1ce AA |
461 | if (likely(transport_len >= sizeof(struct udphdr))) { |
462 | struct udphdr *uh = udp_hdr(skb); | |
463 | ||
464 | if (uh->check || skb->ip_summed == CHECKSUM_PARTIAL) { | |
465 | inet_proto_csum_replace16(&uh->check, skb, | |
4b048d6d | 466 | addr, new_addr, true); |
3fdbd1ce AA |
467 | if (!uh->check) |
468 | uh->check = CSUM_MANGLED_0; | |
469 | } | |
470 | } | |
856447d0 JG |
471 | } else if (l4_proto == NEXTHDR_ICMP) { |
472 | if (likely(transport_len >= sizeof(struct icmp6hdr))) | |
473 | inet_proto_csum_replace16(&icmp6_hdr(skb)->icmp6_cksum, | |
4b048d6d | 474 | skb, addr, new_addr, true); |
3fdbd1ce AA |
475 | } |
476 | } | |
477 | ||
83d2b9ba JR |
478 | static void mask_ipv6_addr(const __be32 old[4], const __be32 addr[4], |
479 | const __be32 mask[4], __be32 masked[4]) | |
480 | { | |
be26b9a8 JS |
481 | masked[0] = OVS_MASKED(old[0], addr[0], mask[0]); |
482 | masked[1] = OVS_MASKED(old[1], addr[1], mask[1]); | |
483 | masked[2] = OVS_MASKED(old[2], addr[2], mask[2]); | |
484 | masked[3] = OVS_MASKED(old[3], addr[3], mask[3]); | |
83d2b9ba JR |
485 | } |
486 | ||
3fdbd1ce AA |
487 | static void set_ipv6_addr(struct sk_buff *skb, u8 l4_proto, |
488 | __be32 addr[4], const __be32 new_addr[4], | |
489 | bool recalculate_csum) | |
490 | { | |
491 | if (recalculate_csum) | |
492 | update_ipv6_checksum(skb, l4_proto, addr, new_addr); | |
493 | ||
7539fadc | 494 | skb_clear_hash(skb); |
3fdbd1ce AA |
495 | memcpy(addr, new_addr, sizeof(__be32[4])); |
496 | } | |
497 | ||
83d2b9ba | 498 | static void set_ipv6_fl(struct ipv6hdr *nh, u32 fl, u32 mask) |
3fdbd1ce | 499 | { |
83d2b9ba | 500 | /* Bits 21-24 are always unmasked, so this retains their values. */ |
be26b9a8 JS |
501 | OVS_SET_MASKED(nh->flow_lbl[0], (u8)(fl >> 16), (u8)(mask >> 16)); |
502 | OVS_SET_MASKED(nh->flow_lbl[1], (u8)(fl >> 8), (u8)(mask >> 8)); | |
503 | OVS_SET_MASKED(nh->flow_lbl[2], (u8)fl, (u8)mask); | |
3fdbd1ce AA |
504 | } |
505 | ||
83d2b9ba JR |
506 | static void set_ip_ttl(struct sk_buff *skb, struct iphdr *nh, u8 new_ttl, |
507 | u8 mask) | |
3fdbd1ce | 508 | { |
be26b9a8 | 509 | new_ttl = OVS_MASKED(nh->ttl, new_ttl, mask); |
3fdbd1ce | 510 | |
ccb1352e JG |
511 | csum_replace2(&nh->check, htons(nh->ttl << 8), htons(new_ttl << 8)); |
512 | nh->ttl = new_ttl; | |
513 | } | |
514 | ||
83d2b9ba JR |
515 | static int set_ipv4(struct sk_buff *skb, struct sw_flow_key *flow_key, |
516 | const struct ovs_key_ipv4 *key, | |
517 | const struct ovs_key_ipv4 *mask) | |
ccb1352e JG |
518 | { |
519 | struct iphdr *nh; | |
83d2b9ba | 520 | __be32 new_addr; |
ccb1352e JG |
521 | int err; |
522 | ||
e2195121 JP |
523 | err = skb_ensure_writable(skb, skb_network_offset(skb) + |
524 | sizeof(struct iphdr)); | |
ccb1352e JG |
525 | if (unlikely(err)) |
526 | return err; | |
527 | ||
528 | nh = ip_hdr(skb); | |
529 | ||
83d2b9ba JR |
530 | /* Setting an IP addresses is typically only a side effect of |
531 | * matching on them in the current userspace implementation, so it | |
532 | * makes sense to check if the value actually changed. | |
533 | */ | |
534 | if (mask->ipv4_src) { | |
be26b9a8 | 535 | new_addr = OVS_MASKED(nh->saddr, key->ipv4_src, mask->ipv4_src); |
ccb1352e | 536 | |
83d2b9ba JR |
537 | if (unlikely(new_addr != nh->saddr)) { |
538 | set_ip_addr(skb, nh, &nh->saddr, new_addr); | |
539 | flow_key->ipv4.addr.src = new_addr; | |
540 | } | |
fff06c36 | 541 | } |
83d2b9ba | 542 | if (mask->ipv4_dst) { |
be26b9a8 | 543 | new_addr = OVS_MASKED(nh->daddr, key->ipv4_dst, mask->ipv4_dst); |
ccb1352e | 544 | |
83d2b9ba JR |
545 | if (unlikely(new_addr != nh->daddr)) { |
546 | set_ip_addr(skb, nh, &nh->daddr, new_addr); | |
547 | flow_key->ipv4.addr.dst = new_addr; | |
548 | } | |
fff06c36 | 549 | } |
83d2b9ba JR |
550 | if (mask->ipv4_tos) { |
551 | ipv4_change_dsfield(nh, ~mask->ipv4_tos, key->ipv4_tos); | |
552 | flow_key->ip.tos = nh->tos; | |
553 | } | |
554 | if (mask->ipv4_ttl) { | |
555 | set_ip_ttl(skb, nh, key->ipv4_ttl, mask->ipv4_ttl); | |
556 | flow_key->ip.ttl = nh->ttl; | |
fff06c36 | 557 | } |
ccb1352e JG |
558 | |
559 | return 0; | |
560 | } | |
561 | ||
83d2b9ba JR |
562 | static bool is_ipv6_mask_nonzero(const __be32 addr[4]) |
563 | { | |
564 | return !!(addr[0] | addr[1] | addr[2] | addr[3]); | |
565 | } | |
566 | ||
567 | static int set_ipv6(struct sk_buff *skb, struct sw_flow_key *flow_key, | |
568 | const struct ovs_key_ipv6 *key, | |
569 | const struct ovs_key_ipv6 *mask) | |
3fdbd1ce AA |
570 | { |
571 | struct ipv6hdr *nh; | |
572 | int err; | |
3fdbd1ce | 573 | |
e2195121 JP |
574 | err = skb_ensure_writable(skb, skb_network_offset(skb) + |
575 | sizeof(struct ipv6hdr)); | |
3fdbd1ce AA |
576 | if (unlikely(err)) |
577 | return err; | |
578 | ||
579 | nh = ipv6_hdr(skb); | |
3fdbd1ce | 580 | |
83d2b9ba JR |
581 | /* Setting an IP addresses is typically only a side effect of |
582 | * matching on them in the current userspace implementation, so it | |
583 | * makes sense to check if the value actually changed. | |
584 | */ | |
585 | if (is_ipv6_mask_nonzero(mask->ipv6_src)) { | |
586 | __be32 *saddr = (__be32 *)&nh->saddr; | |
587 | __be32 masked[4]; | |
588 | ||
589 | mask_ipv6_addr(saddr, key->ipv6_src, mask->ipv6_src, masked); | |
590 | ||
591 | if (unlikely(memcmp(saddr, masked, sizeof(masked)))) { | |
b4f70527 | 592 | set_ipv6_addr(skb, flow_key->ip.proto, saddr, masked, |
83d2b9ba JR |
593 | true); |
594 | memcpy(&flow_key->ipv6.addr.src, masked, | |
595 | sizeof(flow_key->ipv6.addr.src)); | |
596 | } | |
597 | } | |
598 | if (is_ipv6_mask_nonzero(mask->ipv6_dst)) { | |
3fdbd1ce AA |
599 | unsigned int offset = 0; |
600 | int flags = IP6_FH_F_SKIP_RH; | |
601 | bool recalc_csum = true; | |
83d2b9ba JR |
602 | __be32 *daddr = (__be32 *)&nh->daddr; |
603 | __be32 masked[4]; | |
604 | ||
605 | mask_ipv6_addr(daddr, key->ipv6_dst, mask->ipv6_dst, masked); | |
606 | ||
607 | if (unlikely(memcmp(daddr, masked, sizeof(masked)))) { | |
608 | if (ipv6_ext_hdr(nh->nexthdr)) | |
609 | recalc_csum = (ipv6_find_hdr(skb, &offset, | |
610 | NEXTHDR_ROUTING, | |
611 | NULL, &flags) | |
612 | != NEXTHDR_ROUTING); | |
613 | ||
b4f70527 | 614 | set_ipv6_addr(skb, flow_key->ip.proto, daddr, masked, |
83d2b9ba JR |
615 | recalc_csum); |
616 | memcpy(&flow_key->ipv6.addr.dst, masked, | |
617 | sizeof(flow_key->ipv6.addr.dst)); | |
618 | } | |
619 | } | |
620 | if (mask->ipv6_tclass) { | |
621 | ipv6_change_dsfield(nh, ~mask->ipv6_tclass, key->ipv6_tclass); | |
622 | flow_key->ip.tos = ipv6_get_dsfield(nh); | |
623 | } | |
624 | if (mask->ipv6_label) { | |
625 | set_ipv6_fl(nh, ntohl(key->ipv6_label), | |
626 | ntohl(mask->ipv6_label)); | |
627 | flow_key->ipv6.label = | |
628 | *(__be32 *)nh & htonl(IPV6_FLOWINFO_FLOWLABEL); | |
629 | } | |
630 | if (mask->ipv6_hlimit) { | |
be26b9a8 JS |
631 | OVS_SET_MASKED(nh->hop_limit, key->ipv6_hlimit, |
632 | mask->ipv6_hlimit); | |
83d2b9ba | 633 | flow_key->ip.ttl = nh->hop_limit; |
3fdbd1ce | 634 | } |
3fdbd1ce AA |
635 | return 0; |
636 | } | |
637 | ||
b2d0f5d5 YY |
638 | static int set_nsh(struct sk_buff *skb, struct sw_flow_key *flow_key, |
639 | const struct nlattr *a) | |
640 | { | |
641 | struct nshhdr *nh; | |
642 | size_t length; | |
643 | int err; | |
644 | u8 flags; | |
645 | u8 ttl; | |
646 | int i; | |
647 | ||
648 | struct ovs_key_nsh key; | |
649 | struct ovs_key_nsh mask; | |
650 | ||
651 | err = nsh_key_from_nlattr(a, &key, &mask); | |
652 | if (err) | |
653 | return err; | |
654 | ||
655 | /* Make sure the NSH base header is there */ | |
656 | if (!pskb_may_pull(skb, skb_network_offset(skb) + NSH_BASE_HDR_LEN)) | |
657 | return -ENOMEM; | |
658 | ||
659 | nh = nsh_hdr(skb); | |
660 | length = nsh_hdr_len(nh); | |
661 | ||
662 | /* Make sure the whole NSH header is there */ | |
663 | err = skb_ensure_writable(skb, skb_network_offset(skb) + | |
664 | length); | |
665 | if (unlikely(err)) | |
666 | return err; | |
667 | ||
668 | nh = nsh_hdr(skb); | |
669 | skb_postpull_rcsum(skb, nh, length); | |
670 | flags = nsh_get_flags(nh); | |
671 | flags = OVS_MASKED(flags, key.base.flags, mask.base.flags); | |
672 | flow_key->nsh.base.flags = flags; | |
673 | ttl = nsh_get_ttl(nh); | |
674 | ttl = OVS_MASKED(ttl, key.base.ttl, mask.base.ttl); | |
675 | flow_key->nsh.base.ttl = ttl; | |
676 | nsh_set_flags_and_ttl(nh, flags, ttl); | |
677 | nh->path_hdr = OVS_MASKED(nh->path_hdr, key.base.path_hdr, | |
678 | mask.base.path_hdr); | |
679 | flow_key->nsh.base.path_hdr = nh->path_hdr; | |
680 | switch (nh->mdtype) { | |
681 | case NSH_M_TYPE1: | |
682 | for (i = 0; i < NSH_MD1_CONTEXT_SIZE; i++) { | |
683 | nh->md1.context[i] = | |
684 | OVS_MASKED(nh->md1.context[i], key.context[i], | |
685 | mask.context[i]); | |
686 | } | |
687 | memcpy(flow_key->nsh.context, nh->md1.context, | |
688 | sizeof(nh->md1.context)); | |
689 | break; | |
690 | case NSH_M_TYPE2: | |
691 | memset(flow_key->nsh.context, 0, | |
692 | sizeof(flow_key->nsh.context)); | |
693 | break; | |
694 | default: | |
695 | return -EINVAL; | |
696 | } | |
697 | skb_postpush_rcsum(skb, nh, length); | |
698 | return 0; | |
699 | } | |
700 | ||
e2195121 | 701 | /* Must follow skb_ensure_writable() since that can move the skb data. */ |
ccb1352e | 702 | static void set_tp_port(struct sk_buff *skb, __be16 *port, |
83d2b9ba | 703 | __be16 new_port, __sum16 *check) |
ccb1352e | 704 | { |
4b048d6d | 705 | inet_proto_csum_replace2(check, skb, *port, new_port, false); |
ccb1352e | 706 | *port = new_port; |
81e5d41d JG |
707 | } |
708 | ||
83d2b9ba JR |
709 | static int set_udp(struct sk_buff *skb, struct sw_flow_key *flow_key, |
710 | const struct ovs_key_udp *key, | |
711 | const struct ovs_key_udp *mask) | |
ccb1352e JG |
712 | { |
713 | struct udphdr *uh; | |
83d2b9ba | 714 | __be16 src, dst; |
ccb1352e JG |
715 | int err; |
716 | ||
e2195121 JP |
717 | err = skb_ensure_writable(skb, skb_transport_offset(skb) + |
718 | sizeof(struct udphdr)); | |
ccb1352e JG |
719 | if (unlikely(err)) |
720 | return err; | |
721 | ||
722 | uh = udp_hdr(skb); | |
83d2b9ba | 723 | /* Either of the masks is non-zero, so do not bother checking them. */ |
be26b9a8 JS |
724 | src = OVS_MASKED(uh->source, key->udp_src, mask->udp_src); |
725 | dst = OVS_MASKED(uh->dest, key->udp_dst, mask->udp_dst); | |
ccb1352e | 726 | |
83d2b9ba JR |
727 | if (uh->check && skb->ip_summed != CHECKSUM_PARTIAL) { |
728 | if (likely(src != uh->source)) { | |
729 | set_tp_port(skb, &uh->source, src, &uh->check); | |
730 | flow_key->tp.src = src; | |
731 | } | |
732 | if (likely(dst != uh->dest)) { | |
733 | set_tp_port(skb, &uh->dest, dst, &uh->check); | |
734 | flow_key->tp.dst = dst; | |
735 | } | |
736 | ||
737 | if (unlikely(!uh->check)) | |
738 | uh->check = CSUM_MANGLED_0; | |
739 | } else { | |
740 | uh->source = src; | |
741 | uh->dest = dst; | |
742 | flow_key->tp.src = src; | |
743 | flow_key->tp.dst = dst; | |
fff06c36 | 744 | } |
ccb1352e | 745 | |
83d2b9ba JR |
746 | skb_clear_hash(skb); |
747 | ||
ccb1352e JG |
748 | return 0; |
749 | } | |
750 | ||
83d2b9ba JR |
751 | static int set_tcp(struct sk_buff *skb, struct sw_flow_key *flow_key, |
752 | const struct ovs_key_tcp *key, | |
753 | const struct ovs_key_tcp *mask) | |
ccb1352e JG |
754 | { |
755 | struct tcphdr *th; | |
83d2b9ba | 756 | __be16 src, dst; |
ccb1352e JG |
757 | int err; |
758 | ||
e2195121 JP |
759 | err = skb_ensure_writable(skb, skb_transport_offset(skb) + |
760 | sizeof(struct tcphdr)); | |
ccb1352e JG |
761 | if (unlikely(err)) |
762 | return err; | |
763 | ||
764 | th = tcp_hdr(skb); | |
be26b9a8 | 765 | src = OVS_MASKED(th->source, key->tcp_src, mask->tcp_src); |
83d2b9ba JR |
766 | if (likely(src != th->source)) { |
767 | set_tp_port(skb, &th->source, src, &th->check); | |
768 | flow_key->tp.src = src; | |
fff06c36 | 769 | } |
be26b9a8 | 770 | dst = OVS_MASKED(th->dest, key->tcp_dst, mask->tcp_dst); |
83d2b9ba JR |
771 | if (likely(dst != th->dest)) { |
772 | set_tp_port(skb, &th->dest, dst, &th->check); | |
773 | flow_key->tp.dst = dst; | |
fff06c36 | 774 | } |
83d2b9ba | 775 | skb_clear_hash(skb); |
ccb1352e JG |
776 | |
777 | return 0; | |
778 | } | |
779 | ||
83d2b9ba JR |
780 | static int set_sctp(struct sk_buff *skb, struct sw_flow_key *flow_key, |
781 | const struct ovs_key_sctp *key, | |
782 | const struct ovs_key_sctp *mask) | |
a175a723 | 783 | { |
83d2b9ba | 784 | unsigned int sctphoff = skb_transport_offset(skb); |
a175a723 | 785 | struct sctphdr *sh; |
83d2b9ba | 786 | __le32 old_correct_csum, new_csum, old_csum; |
a175a723 | 787 | int err; |
a175a723 | 788 | |
e2195121 | 789 | err = skb_ensure_writable(skb, sctphoff + sizeof(struct sctphdr)); |
a175a723 JS |
790 | if (unlikely(err)) |
791 | return err; | |
792 | ||
793 | sh = sctp_hdr(skb); | |
83d2b9ba JR |
794 | old_csum = sh->checksum; |
795 | old_correct_csum = sctp_compute_cksum(skb, sctphoff); | |
a175a723 | 796 | |
be26b9a8 JS |
797 | sh->source = OVS_MASKED(sh->source, key->sctp_src, mask->sctp_src); |
798 | sh->dest = OVS_MASKED(sh->dest, key->sctp_dst, mask->sctp_dst); | |
a175a723 | 799 | |
83d2b9ba | 800 | new_csum = sctp_compute_cksum(skb, sctphoff); |
a175a723 | 801 | |
83d2b9ba JR |
802 | /* Carry any checksum errors through. */ |
803 | sh->checksum = old_csum ^ old_correct_csum ^ new_csum; | |
a175a723 | 804 | |
83d2b9ba JR |
805 | skb_clear_hash(skb); |
806 | flow_key->tp.src = sh->source; | |
807 | flow_key->tp.dst = sh->dest; | |
a175a723 JS |
808 | |
809 | return 0; | |
810 | } | |
811 | ||
188515fb | 812 | static int ovs_vport_output(struct net *net, struct sock *sk, struct sk_buff *skb) |
7f8a436e JS |
813 | { |
814 | struct ovs_frag_data *data = this_cpu_ptr(&ovs_frag_data_storage); | |
815 | struct vport *vport = data->vport; | |
816 | ||
817 | if (skb_cow_head(skb, data->l2_len) < 0) { | |
818 | kfree_skb(skb); | |
819 | return -ENOMEM; | |
820 | } | |
821 | ||
822 | __skb_dst_copy(skb, data->dst); | |
823 | *OVS_CB(skb) = data->cb; | |
824 | skb->inner_protocol = data->inner_protocol; | |
825 | skb->vlan_tci = data->vlan_tci; | |
826 | skb->vlan_proto = data->vlan_proto; | |
827 | ||
828 | /* Reconstruct the MAC header. */ | |
829 | skb_push(skb, data->l2_len); | |
830 | memcpy(skb->data, &data->l2_data, data->l2_len); | |
6b83d28a | 831 | skb_postpush_rcsum(skb, skb->data, data->l2_len); |
7f8a436e JS |
832 | skb_reset_mac_header(skb); |
833 | ||
c66549ff JB |
834 | if (eth_p_mpls(skb->protocol)) { |
835 | skb->inner_network_header = skb->network_header; | |
836 | skb_set_network_header(skb, data->network_offset); | |
837 | skb_reset_mac_len(skb); | |
838 | } | |
839 | ||
e2d9d835 | 840 | ovs_vport_send(vport, skb, data->mac_proto); |
7f8a436e JS |
841 | return 0; |
842 | } | |
843 | ||
844 | static unsigned int | |
845 | ovs_dst_get_mtu(const struct dst_entry *dst) | |
846 | { | |
847 | return dst->dev->mtu; | |
848 | } | |
849 | ||
850 | static struct dst_ops ovs_dst_ops = { | |
851 | .family = AF_UNSPEC, | |
852 | .mtu = ovs_dst_get_mtu, | |
853 | }; | |
854 | ||
855 | /* prepare_frag() is called once per (larger-than-MTU) frame; its inverse is | |
856 | * ovs_vport_output(), which is called once per fragmented packet. | |
857 | */ | |
c66549ff | 858 | static void prepare_frag(struct vport *vport, struct sk_buff *skb, |
e2d9d835 | 859 | u16 orig_network_offset, u8 mac_proto) |
7f8a436e JS |
860 | { |
861 | unsigned int hlen = skb_network_offset(skb); | |
862 | struct ovs_frag_data *data; | |
863 | ||
864 | data = this_cpu_ptr(&ovs_frag_data_storage); | |
865 | data->dst = skb->_skb_refdst; | |
866 | data->vport = vport; | |
867 | data->cb = *OVS_CB(skb); | |
868 | data->inner_protocol = skb->inner_protocol; | |
c66549ff | 869 | data->network_offset = orig_network_offset; |
7f8a436e JS |
870 | data->vlan_tci = skb->vlan_tci; |
871 | data->vlan_proto = skb->vlan_proto; | |
e2d9d835 | 872 | data->mac_proto = mac_proto; |
7f8a436e JS |
873 | data->l2_len = hlen; |
874 | memcpy(&data->l2_data, skb->data, hlen); | |
875 | ||
876 | memset(IPCB(skb), 0, sizeof(struct inet_skb_parm)); | |
877 | skb_pull(skb, hlen); | |
878 | } | |
879 | ||
c559cd3a | 880 | static void ovs_fragment(struct net *net, struct vport *vport, |
e2d9d835 JB |
881 | struct sk_buff *skb, u16 mru, |
882 | struct sw_flow_key *key) | |
7f8a436e | 883 | { |
c66549ff JB |
884 | u16 orig_network_offset = 0; |
885 | ||
886 | if (eth_p_mpls(skb->protocol)) { | |
887 | orig_network_offset = skb_network_offset(skb); | |
888 | skb->network_header = skb->inner_network_header; | |
889 | } | |
890 | ||
7f8a436e JS |
891 | if (skb_network_offset(skb) > MAX_L2_LEN) { |
892 | OVS_NLERR(1, "L2 header too long to fragment"); | |
b8f22570 | 893 | goto err; |
7f8a436e JS |
894 | } |
895 | ||
e2d9d835 | 896 | if (key->eth.type == htons(ETH_P_IP)) { |
7f8a436e JS |
897 | struct dst_entry ovs_dst; |
898 | unsigned long orig_dst; | |
899 | ||
e2d9d835 JB |
900 | prepare_frag(vport, skb, orig_network_offset, |
901 | ovs_key_mac_proto(key)); | |
7f8a436e JS |
902 | dst_init(&ovs_dst, &ovs_dst_ops, NULL, 1, |
903 | DST_OBSOLETE_NONE, DST_NOCOUNT); | |
904 | ovs_dst.dev = vport->dev; | |
905 | ||
906 | orig_dst = skb->_skb_refdst; | |
907 | skb_dst_set_noref(skb, &ovs_dst); | |
908 | IPCB(skb)->frag_max_size = mru; | |
909 | ||
694869b3 | 910 | ip_do_fragment(net, skb->sk, skb, ovs_vport_output); |
7f8a436e | 911 | refdst_drop(orig_dst); |
e2d9d835 | 912 | } else if (key->eth.type == htons(ETH_P_IPV6)) { |
7f8a436e JS |
913 | const struct nf_ipv6_ops *v6ops = nf_get_ipv6_ops(); |
914 | unsigned long orig_dst; | |
915 | struct rt6_info ovs_rt; | |
916 | ||
f1304f7b | 917 | if (!v6ops) |
b8f22570 | 918 | goto err; |
7f8a436e | 919 | |
e2d9d835 JB |
920 | prepare_frag(vport, skb, orig_network_offset, |
921 | ovs_key_mac_proto(key)); | |
7f8a436e JS |
922 | memset(&ovs_rt, 0, sizeof(ovs_rt)); |
923 | dst_init(&ovs_rt.dst, &ovs_dst_ops, NULL, 1, | |
924 | DST_OBSOLETE_NONE, DST_NOCOUNT); | |
925 | ovs_rt.dst.dev = vport->dev; | |
926 | ||
927 | orig_dst = skb->_skb_refdst; | |
928 | skb_dst_set_noref(skb, &ovs_rt.dst); | |
929 | IP6CB(skb)->frag_max_size = mru; | |
930 | ||
7d8c6e39 | 931 | v6ops->fragment(net, skb->sk, skb, ovs_vport_output); |
7f8a436e JS |
932 | refdst_drop(orig_dst); |
933 | } else { | |
934 | WARN_ONCE(1, "Failed fragment ->%s: eth=%04x, MRU=%d, MTU=%d.", | |
e2d9d835 | 935 | ovs_vport_name(vport), ntohs(key->eth.type), mru, |
7f8a436e | 936 | vport->dev->mtu); |
b8f22570 | 937 | goto err; |
7f8a436e | 938 | } |
b8f22570 JS |
939 | |
940 | return; | |
941 | err: | |
942 | kfree_skb(skb); | |
7f8a436e JS |
943 | } |
944 | ||
945 | static void do_output(struct datapath *dp, struct sk_buff *skb, int out_port, | |
946 | struct sw_flow_key *key) | |
ccb1352e | 947 | { |
738967b8 | 948 | struct vport *vport = ovs_vport_rcu(dp, out_port); |
ccb1352e | 949 | |
7f8a436e JS |
950 | if (likely(vport)) { |
951 | u16 mru = OVS_CB(skb)->mru; | |
f2a4d086 WT |
952 | u32 cutlen = OVS_CB(skb)->cutlen; |
953 | ||
954 | if (unlikely(cutlen > 0)) { | |
e2d9d835 | 955 | if (skb->len - cutlen > ovs_mac_header_len(key)) |
f2a4d086 WT |
956 | pskb_trim(skb, skb->len - cutlen); |
957 | else | |
e2d9d835 | 958 | pskb_trim(skb, ovs_mac_header_len(key)); |
f2a4d086 | 959 | } |
7f8a436e | 960 | |
738314a0 JB |
961 | if (likely(!mru || |
962 | (skb->len <= mru + vport->dev->hard_header_len))) { | |
e2d9d835 | 963 | ovs_vport_send(vport, skb, ovs_key_mac_proto(key)); |
7f8a436e | 964 | } else if (mru <= vport->dev->mtu) { |
c559cd3a | 965 | struct net *net = read_pnet(&dp->net); |
7f8a436e | 966 | |
e2d9d835 | 967 | ovs_fragment(net, vport, skb, mru, key); |
7f8a436e JS |
968 | } else { |
969 | kfree_skb(skb); | |
970 | } | |
971 | } else { | |
ccb1352e | 972 | kfree_skb(skb); |
7f8a436e | 973 | } |
ccb1352e JG |
974 | } |
975 | ||
976 | static int output_userspace(struct datapath *dp, struct sk_buff *skb, | |
ccea7445 | 977 | struct sw_flow_key *key, const struct nlattr *attr, |
f2a4d086 WT |
978 | const struct nlattr *actions, int actions_len, |
979 | uint32_t cutlen) | |
ccb1352e JG |
980 | { |
981 | struct dp_upcall_info upcall; | |
982 | const struct nlattr *a; | |
983 | int rem; | |
984 | ||
ccea7445 | 985 | memset(&upcall, 0, sizeof(upcall)); |
ccb1352e | 986 | upcall.cmd = OVS_PACKET_CMD_ACTION; |
7f8a436e | 987 | upcall.mru = OVS_CB(skb)->mru; |
ccb1352e JG |
988 | |
989 | for (a = nla_data(attr), rem = nla_len(attr); rem > 0; | |
990 | a = nla_next(a, &rem)) { | |
991 | switch (nla_type(a)) { | |
992 | case OVS_USERSPACE_ATTR_USERDATA: | |
993 | upcall.userdata = a; | |
994 | break; | |
995 | ||
996 | case OVS_USERSPACE_ATTR_PID: | |
15e47304 | 997 | upcall.portid = nla_get_u32(a); |
ccb1352e | 998 | break; |
8f0aad6f WZ |
999 | |
1000 | case OVS_USERSPACE_ATTR_EGRESS_TUN_PORT: { | |
1001 | /* Get out tunnel info. */ | |
1002 | struct vport *vport; | |
1003 | ||
1004 | vport = ovs_vport_rcu(dp, nla_get_u32(a)); | |
1005 | if (vport) { | |
1006 | int err; | |
1007 | ||
fc4099f1 PS |
1008 | err = dev_fill_metadata_dst(vport->dev, skb); |
1009 | if (!err) | |
1010 | upcall.egress_tun_info = skb_tunnel_info(skb); | |
8f0aad6f | 1011 | } |
4c222798 | 1012 | |
8f0aad6f | 1013 | break; |
ccb1352e | 1014 | } |
8f0aad6f | 1015 | |
ccea7445 NM |
1016 | case OVS_USERSPACE_ATTR_ACTIONS: { |
1017 | /* Include actions. */ | |
1018 | upcall.actions = actions; | |
1019 | upcall.actions_len = actions_len; | |
1020 | break; | |
1021 | } | |
1022 | ||
8f0aad6f | 1023 | } /* End of switch. */ |
ccb1352e JG |
1024 | } |
1025 | ||
f2a4d086 | 1026 | return ovs_dp_upcall(dp, skb, key, &upcall, cutlen); |
ccb1352e JG |
1027 | } |
1028 | ||
798c1661 | 1029 | /* When 'last' is true, sample() should always consume the 'skb'. |
1030 | * Otherwise, sample() should keep 'skb' intact regardless what | |
1031 | * actions are executed within sample(). | |
1032 | */ | |
ccb1352e | 1033 | static int sample(struct datapath *dp, struct sk_buff *skb, |
ccea7445 | 1034 | struct sw_flow_key *key, const struct nlattr *attr, |
798c1661 | 1035 | bool last) |
ccb1352e | 1036 | { |
798c1661 | 1037 | struct nlattr *actions; |
1038 | struct nlattr *sample_arg; | |
798c1661 | 1039 | int rem = nla_len(attr); |
798c1661 | 1040 | const struct sample_arg *arg; |
bef7f756 | 1041 | bool clone_flow_key; |
ccb1352e | 1042 | |
798c1661 | 1043 | /* The first action is always 'OVS_SAMPLE_ATTR_ARG'. */ |
1044 | sample_arg = nla_data(attr); | |
1045 | arg = nla_data(sample_arg); | |
1046 | actions = nla_next(sample_arg, &rem); | |
e05176a3 | 1047 | |
798c1661 | 1048 | if ((arg->probability != U32_MAX) && |
1049 | (!arg->probability || prandom_u32() > arg->probability)) { | |
1050 | if (last) | |
1051 | consume_skb(skb); | |
1052 | return 0; | |
ccb1352e JG |
1053 | } |
1054 | ||
bef7f756 | 1055 | clone_flow_key = !arg->exec; |
1056 | return clone_execute(dp, skb, key, 0, actions, rem, last, | |
1057 | clone_flow_key); | |
971427f3 AZ |
1058 | } |
1059 | ||
1060 | static void execute_hash(struct sk_buff *skb, struct sw_flow_key *key, | |
1061 | const struct nlattr *attr) | |
1062 | { | |
1063 | struct ovs_action_hash *hash_act = nla_data(attr); | |
1064 | u32 hash = 0; | |
1065 | ||
1066 | /* OVS_HASH_ALG_L4 is the only possible hash algorithm. */ | |
1067 | hash = skb_get_hash(skb); | |
1068 | hash = jhash_1word(hash, hash_act->hash_basis); | |
1069 | if (!hash) | |
1070 | hash = 0x1; | |
1071 | ||
1072 | key->ovs_flow_hash = hash; | |
ccb1352e JG |
1073 | } |
1074 | ||
83d2b9ba JR |
1075 | static int execute_set_action(struct sk_buff *skb, |
1076 | struct sw_flow_key *flow_key, | |
1077 | const struct nlattr *a) | |
1078 | { | |
1079 | /* Only tunnel set execution is supported without a mask. */ | |
1080 | if (nla_type(a) == OVS_KEY_ATTR_TUNNEL_INFO) { | |
34ae932a TG |
1081 | struct ovs_tunnel_info *tun = nla_data(a); |
1082 | ||
1083 | skb_dst_drop(skb); | |
1084 | dst_hold((struct dst_entry *)tun->tun_dst); | |
1085 | skb_dst_set(skb, (struct dst_entry *)tun->tun_dst); | |
83d2b9ba JR |
1086 | return 0; |
1087 | } | |
1088 | ||
1089 | return -EINVAL; | |
1090 | } | |
1091 | ||
1092 | /* Mask is at the midpoint of the data. */ | |
1093 | #define get_mask(a, type) ((const type)nla_data(a) + 1) | |
1094 | ||
1095 | static int execute_masked_set_action(struct sk_buff *skb, | |
1096 | struct sw_flow_key *flow_key, | |
1097 | const struct nlattr *a) | |
ccb1352e JG |
1098 | { |
1099 | int err = 0; | |
1100 | ||
83d2b9ba | 1101 | switch (nla_type(a)) { |
ccb1352e | 1102 | case OVS_KEY_ATTR_PRIORITY: |
be26b9a8 JS |
1103 | OVS_SET_MASKED(skb->priority, nla_get_u32(a), |
1104 | *get_mask(a, u32 *)); | |
83d2b9ba | 1105 | flow_key->phy.priority = skb->priority; |
ccb1352e JG |
1106 | break; |
1107 | ||
39c7caeb | 1108 | case OVS_KEY_ATTR_SKB_MARK: |
be26b9a8 | 1109 | OVS_SET_MASKED(skb->mark, nla_get_u32(a), *get_mask(a, u32 *)); |
83d2b9ba | 1110 | flow_key->phy.skb_mark = skb->mark; |
39c7caeb AA |
1111 | break; |
1112 | ||
f0b128c1 | 1113 | case OVS_KEY_ATTR_TUNNEL_INFO: |
83d2b9ba JR |
1114 | /* Masked data not supported for tunnel. */ |
1115 | err = -EINVAL; | |
7d5437c7 PS |
1116 | break; |
1117 | ||
ccb1352e | 1118 | case OVS_KEY_ATTR_ETHERNET: |
83d2b9ba JR |
1119 | err = set_eth_addr(skb, flow_key, nla_data(a), |
1120 | get_mask(a, struct ovs_key_ethernet *)); | |
ccb1352e JG |
1121 | break; |
1122 | ||
b2d0f5d5 YY |
1123 | case OVS_KEY_ATTR_NSH: |
1124 | err = set_nsh(skb, flow_key, a); | |
1125 | break; | |
1126 | ||
ccb1352e | 1127 | case OVS_KEY_ATTR_IPV4: |
83d2b9ba JR |
1128 | err = set_ipv4(skb, flow_key, nla_data(a), |
1129 | get_mask(a, struct ovs_key_ipv4 *)); | |
ccb1352e JG |
1130 | break; |
1131 | ||
3fdbd1ce | 1132 | case OVS_KEY_ATTR_IPV6: |
83d2b9ba JR |
1133 | err = set_ipv6(skb, flow_key, nla_data(a), |
1134 | get_mask(a, struct ovs_key_ipv6 *)); | |
3fdbd1ce AA |
1135 | break; |
1136 | ||
ccb1352e | 1137 | case OVS_KEY_ATTR_TCP: |
83d2b9ba JR |
1138 | err = set_tcp(skb, flow_key, nla_data(a), |
1139 | get_mask(a, struct ovs_key_tcp *)); | |
ccb1352e JG |
1140 | break; |
1141 | ||
1142 | case OVS_KEY_ATTR_UDP: | |
83d2b9ba JR |
1143 | err = set_udp(skb, flow_key, nla_data(a), |
1144 | get_mask(a, struct ovs_key_udp *)); | |
ccb1352e | 1145 | break; |
a175a723 JS |
1146 | |
1147 | case OVS_KEY_ATTR_SCTP: | |
83d2b9ba JR |
1148 | err = set_sctp(skb, flow_key, nla_data(a), |
1149 | get_mask(a, struct ovs_key_sctp *)); | |
a175a723 | 1150 | break; |
25cd9ba0 SH |
1151 | |
1152 | case OVS_KEY_ATTR_MPLS: | |
83d2b9ba JR |
1153 | err = set_mpls(skb, flow_key, nla_data(a), get_mask(a, |
1154 | __be32 *)); | |
25cd9ba0 | 1155 | break; |
7f8a436e JS |
1156 | |
1157 | case OVS_KEY_ATTR_CT_STATE: | |
1158 | case OVS_KEY_ATTR_CT_ZONE: | |
182e3042 | 1159 | case OVS_KEY_ATTR_CT_MARK: |
33db4125 | 1160 | case OVS_KEY_ATTR_CT_LABELS: |
9dd7f890 JR |
1161 | case OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4: |
1162 | case OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6: | |
7f8a436e JS |
1163 | err = -EINVAL; |
1164 | break; | |
ccb1352e JG |
1165 | } |
1166 | ||
1167 | return err; | |
1168 | } | |
1169 | ||
971427f3 AZ |
1170 | static int execute_recirc(struct datapath *dp, struct sk_buff *skb, |
1171 | struct sw_flow_key *key, | |
bef7f756 | 1172 | const struct nlattr *a, bool last) |
971427f3 | 1173 | { |
bef7f756 | 1174 | u32 recirc_id; |
971427f3 | 1175 | |
fff06c36 PS |
1176 | if (!is_flow_key_valid(key)) { |
1177 | int err; | |
1178 | ||
1179 | err = ovs_flow_key_update(skb, key); | |
1180 | if (err) | |
1181 | return err; | |
1182 | } | |
1183 | BUG_ON(!is_flow_key_valid(key)); | |
971427f3 | 1184 | |
bef7f756 | 1185 | recirc_id = nla_get_u32(a); |
1186 | return clone_execute(dp, skb, key, recirc_id, NULL, 0, last, true); | |
971427f3 AZ |
1187 | } |
1188 | ||
ccb1352e JG |
1189 | /* Execute a list of actions against 'skb'. */ |
1190 | static int do_execute_actions(struct datapath *dp, struct sk_buff *skb, | |
2ff3e4e4 | 1191 | struct sw_flow_key *key, |
651887b0 | 1192 | const struct nlattr *attr, int len) |
ccb1352e | 1193 | { |
ccb1352e JG |
1194 | const struct nlattr *a; |
1195 | int rem; | |
1196 | ||
1197 | for (a = attr, rem = len; rem > 0; | |
1198 | a = nla_next(a, &rem)) { | |
1199 | int err = 0; | |
1200 | ||
5b8784aa | 1201 | switch (nla_type(a)) { |
1202 | case OVS_ACTION_ATTR_OUTPUT: { | |
1203 | int port = nla_get_u32(a); | |
1204 | struct sk_buff *clone; | |
1205 | ||
1206 | /* Every output action needs a separate clone | |
1207 | * of 'skb', In case the output action is the | |
1208 | * last action, cloning can be avoided. | |
1209 | */ | |
1210 | if (nla_is_last(a, rem)) { | |
1211 | do_output(dp, skb, port, key); | |
1212 | /* 'skb' has been used for output. | |
1213 | */ | |
1214 | return 0; | |
1215 | } | |
738967b8 | 1216 | |
5b8784aa | 1217 | clone = skb_clone(skb, GFP_ATOMIC); |
1218 | if (clone) | |
1219 | do_output(dp, clone, port, key); | |
f2a4d086 | 1220 | OVS_CB(skb)->cutlen = 0; |
ccb1352e | 1221 | break; |
5b8784aa | 1222 | } |
ccb1352e | 1223 | |
f2a4d086 WT |
1224 | case OVS_ACTION_ATTR_TRUNC: { |
1225 | struct ovs_action_trunc *trunc = nla_data(a); | |
1226 | ||
1227 | if (skb->len > trunc->max_len) | |
1228 | OVS_CB(skb)->cutlen = skb->len - trunc->max_len; | |
1229 | break; | |
1230 | } | |
1231 | ||
ccb1352e | 1232 | case OVS_ACTION_ATTR_USERSPACE: |
f2a4d086 WT |
1233 | output_userspace(dp, skb, key, a, attr, |
1234 | len, OVS_CB(skb)->cutlen); | |
1235 | OVS_CB(skb)->cutlen = 0; | |
ccb1352e JG |
1236 | break; |
1237 | ||
971427f3 AZ |
1238 | case OVS_ACTION_ATTR_HASH: |
1239 | execute_hash(skb, key, a); | |
1240 | break; | |
1241 | ||
25cd9ba0 | 1242 | case OVS_ACTION_ATTR_PUSH_MPLS: |
fff06c36 | 1243 | err = push_mpls(skb, key, nla_data(a)); |
25cd9ba0 SH |
1244 | break; |
1245 | ||
1246 | case OVS_ACTION_ATTR_POP_MPLS: | |
fff06c36 | 1247 | err = pop_mpls(skb, key, nla_get_be16(a)); |
25cd9ba0 SH |
1248 | break; |
1249 | ||
ccb1352e | 1250 | case OVS_ACTION_ATTR_PUSH_VLAN: |
fff06c36 | 1251 | err = push_vlan(skb, key, nla_data(a)); |
ccb1352e JG |
1252 | break; |
1253 | ||
1254 | case OVS_ACTION_ATTR_POP_VLAN: | |
fff06c36 | 1255 | err = pop_vlan(skb, key); |
ccb1352e JG |
1256 | break; |
1257 | ||
bef7f756 | 1258 | case OVS_ACTION_ATTR_RECIRC: { |
1259 | bool last = nla_is_last(a, rem); | |
1260 | ||
1261 | err = execute_recirc(dp, skb, key, a, last); | |
1262 | if (last) { | |
971427f3 AZ |
1263 | /* If this is the last action, the skb has |
1264 | * been consumed or freed. | |
1265 | * Return immediately. | |
1266 | */ | |
1267 | return err; | |
1268 | } | |
1269 | break; | |
bef7f756 | 1270 | } |
971427f3 | 1271 | |
ccb1352e | 1272 | case OVS_ACTION_ATTR_SET: |
fff06c36 | 1273 | err = execute_set_action(skb, key, nla_data(a)); |
ccb1352e JG |
1274 | break; |
1275 | ||
83d2b9ba JR |
1276 | case OVS_ACTION_ATTR_SET_MASKED: |
1277 | case OVS_ACTION_ATTR_SET_TO_MASKED: | |
1278 | err = execute_masked_set_action(skb, key, nla_data(a)); | |
1279 | break; | |
1280 | ||
798c1661 | 1281 | case OVS_ACTION_ATTR_SAMPLE: { |
1282 | bool last = nla_is_last(a, rem); | |
1283 | ||
1284 | err = sample(dp, skb, key, a, last); | |
1285 | if (last) | |
1286 | return err; | |
1287 | ||
ccb1352e | 1288 | break; |
798c1661 | 1289 | } |
7f8a436e JS |
1290 | |
1291 | case OVS_ACTION_ATTR_CT: | |
ec0d043d JS |
1292 | if (!is_flow_key_valid(key)) { |
1293 | err = ovs_flow_key_update(skb, key); | |
1294 | if (err) | |
1295 | return err; | |
1296 | } | |
1297 | ||
7f8a436e JS |
1298 | err = ovs_ct_execute(ovs_dp_get_net(dp), skb, key, |
1299 | nla_data(a)); | |
1300 | ||
1301 | /* Hide stolen IP fragments from user space. */ | |
74c16618 JS |
1302 | if (err) |
1303 | return err == -EINPROGRESS ? 0 : err; | |
7f8a436e | 1304 | break; |
91820da6 | 1305 | |
b8226962 EG |
1306 | case OVS_ACTION_ATTR_CT_CLEAR: |
1307 | err = ovs_ct_clear(skb, key); | |
1308 | break; | |
1309 | ||
91820da6 JB |
1310 | case OVS_ACTION_ATTR_PUSH_ETH: |
1311 | err = push_eth(skb, key, nla_data(a)); | |
1312 | break; | |
1313 | ||
1314 | case OVS_ACTION_ATTR_POP_ETH: | |
1315 | err = pop_eth(skb, key); | |
1316 | break; | |
b2d0f5d5 YY |
1317 | |
1318 | case OVS_ACTION_ATTR_PUSH_NSH: { | |
1319 | u8 buffer[NSH_HDR_MAX_LEN]; | |
1320 | struct nshhdr *nh = (struct nshhdr *)buffer; | |
1321 | ||
1322 | err = nsh_hdr_from_nlattr(nla_data(a), nh, | |
1323 | NSH_HDR_MAX_LEN); | |
1324 | if (unlikely(err)) | |
1325 | break; | |
1326 | err = push_nsh(skb, key, nh); | |
1327 | break; | |
1328 | } | |
1329 | ||
1330 | case OVS_ACTION_ATTR_POP_NSH: | |
1331 | err = pop_nsh(skb, key); | |
1332 | break; | |
cd8a6c33 AZ |
1333 | |
1334 | case OVS_ACTION_ATTR_METER: | |
1335 | if (ovs_meter_execute(dp, skb, key, nla_get_u32(a))) { | |
1336 | consume_skb(skb); | |
1337 | return 0; | |
1338 | } | |
ccb1352e JG |
1339 | } |
1340 | ||
1341 | if (unlikely(err)) { | |
1342 | kfree_skb(skb); | |
1343 | return err; | |
1344 | } | |
1345 | } | |
1346 | ||
5b8784aa | 1347 | consume_skb(skb); |
ccb1352e JG |
1348 | return 0; |
1349 | } | |
1350 | ||
bef7f756 | 1351 | /* Execute the actions on the clone of the packet. The effect of the |
1352 | * execution does not affect the original 'skb' nor the original 'key'. | |
1353 | * | |
1354 | * The execution may be deferred in case the actions can not be executed | |
1355 | * immediately. | |
1356 | */ | |
1357 | static int clone_execute(struct datapath *dp, struct sk_buff *skb, | |
1358 | struct sw_flow_key *key, u32 recirc_id, | |
1359 | const struct nlattr *actions, int len, | |
1360 | bool last, bool clone_flow_key) | |
1361 | { | |
1362 | struct deferred_action *da; | |
1363 | struct sw_flow_key *clone; | |
1364 | ||
1365 | skb = last ? skb : skb_clone(skb, GFP_ATOMIC); | |
1366 | if (!skb) { | |
1367 | /* Out of memory, skip this action. | |
1368 | */ | |
1369 | return 0; | |
1370 | } | |
1371 | ||
1372 | /* When clone_flow_key is false, the 'key' will not be change | |
1373 | * by the actions, then the 'key' can be used directly. | |
1374 | * Otherwise, try to clone key from the next recursion level of | |
1375 | * 'flow_keys'. If clone is successful, execute the actions | |
1376 | * without deferring. | |
1377 | */ | |
1378 | clone = clone_flow_key ? clone_key(key) : key; | |
1379 | if (clone) { | |
1380 | int err = 0; | |
1381 | ||
1382 | if (actions) { /* Sample action */ | |
1383 | if (clone_flow_key) | |
1384 | __this_cpu_inc(exec_actions_level); | |
1385 | ||
1386 | err = do_execute_actions(dp, skb, clone, | |
1387 | actions, len); | |
1388 | ||
1389 | if (clone_flow_key) | |
1390 | __this_cpu_dec(exec_actions_level); | |
1391 | } else { /* Recirc action */ | |
1392 | clone->recirc_id = recirc_id; | |
1393 | ovs_dp_process_packet(skb, clone); | |
1394 | } | |
1395 | return err; | |
1396 | } | |
1397 | ||
1398 | /* Out of 'flow_keys' space. Defer actions */ | |
1399 | da = add_deferred_actions(skb, key, actions, len); | |
1400 | if (da) { | |
1401 | if (!actions) { /* Recirc action */ | |
1402 | key = &da->pkt_key; | |
1403 | key->recirc_id = recirc_id; | |
1404 | } | |
1405 | } else { | |
1406 | /* Out of per CPU action FIFO space. Drop the 'skb' and | |
1407 | * log an error. | |
1408 | */ | |
1409 | kfree_skb(skb); | |
1410 | ||
1411 | if (net_ratelimit()) { | |
1412 | if (actions) { /* Sample action */ | |
1413 | pr_warn("%s: deferred action limit reached, drop sample action\n", | |
1414 | ovs_dp_name(dp)); | |
1415 | } else { /* Recirc action */ | |
1416 | pr_warn("%s: deferred action limit reached, drop recirc action\n", | |
1417 | ovs_dp_name(dp)); | |
1418 | } | |
1419 | } | |
1420 | } | |
1421 | return 0; | |
1422 | } | |
1423 | ||
971427f3 AZ |
1424 | static void process_deferred_actions(struct datapath *dp) |
1425 | { | |
1426 | struct action_fifo *fifo = this_cpu_ptr(action_fifos); | |
1427 | ||
1428 | /* Do not touch the FIFO in case there is no deferred actions. */ | |
1429 | if (action_fifo_is_empty(fifo)) | |
1430 | return; | |
1431 | ||
1432 | /* Finishing executing all deferred actions. */ | |
1433 | do { | |
1434 | struct deferred_action *da = action_fifo_get(fifo); | |
1435 | struct sk_buff *skb = da->skb; | |
1436 | struct sw_flow_key *key = &da->pkt_key; | |
1437 | const struct nlattr *actions = da->actions; | |
47c697aa | 1438 | int actions_len = da->actions_len; |
971427f3 AZ |
1439 | |
1440 | if (actions) | |
47c697aa | 1441 | do_execute_actions(dp, skb, key, actions, actions_len); |
971427f3 AZ |
1442 | else |
1443 | ovs_dp_process_packet(skb, key); | |
1444 | } while (!action_fifo_is_empty(fifo)); | |
1445 | ||
1446 | /* Reset FIFO for the next packet. */ | |
1447 | action_fifo_init(fifo); | |
1448 | } | |
1449 | ||
ccb1352e | 1450 | /* Execute a list of actions against 'skb'. */ |
2ff3e4e4 | 1451 | int ovs_execute_actions(struct datapath *dp, struct sk_buff *skb, |
12eb18f7 TG |
1452 | const struct sw_flow_actions *acts, |
1453 | struct sw_flow_key *key) | |
ccb1352e | 1454 | { |
b064d0d8 HFS |
1455 | int err, level; |
1456 | ||
1457 | level = __this_cpu_inc_return(exec_actions_level); | |
2679d040 | 1458 | if (unlikely(level > OVS_RECURSION_LIMIT)) { |
b064d0d8 HFS |
1459 | net_crit_ratelimited("ovs: recursion limit reached on datapath %s, probable configuration error\n", |
1460 | ovs_dp_name(dp)); | |
1461 | kfree_skb(skb); | |
1462 | err = -ENETDOWN; | |
1463 | goto out; | |
1464 | } | |
971427f3 | 1465 | |
494bea39 | 1466 | OVS_CB(skb)->acts_origlen = acts->orig_len; |
971427f3 AZ |
1467 | err = do_execute_actions(dp, skb, key, |
1468 | acts->actions, acts->actions_len); | |
1469 | ||
b064d0d8 | 1470 | if (level == 1) |
971427f3 AZ |
1471 | process_deferred_actions(dp); |
1472 | ||
b064d0d8 HFS |
1473 | out: |
1474 | __this_cpu_dec(exec_actions_level); | |
971427f3 AZ |
1475 | return err; |
1476 | } | |
1477 | ||
1478 | int action_fifos_init(void) | |
1479 | { | |
1480 | action_fifos = alloc_percpu(struct action_fifo); | |
1481 | if (!action_fifos) | |
1482 | return -ENOMEM; | |
ccb1352e | 1483 | |
4572ef52 | 1484 | flow_keys = alloc_percpu(struct action_flow_keys); |
1485 | if (!flow_keys) { | |
2679d040 LR |
1486 | free_percpu(action_fifos); |
1487 | return -ENOMEM; | |
1488 | } | |
1489 | ||
971427f3 AZ |
1490 | return 0; |
1491 | } | |
1492 | ||
1493 | void action_fifos_exit(void) | |
1494 | { | |
1495 | free_percpu(action_fifos); | |
4572ef52 | 1496 | free_percpu(flow_keys); |
ccb1352e | 1497 | } |