]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - net/openvswitch/flow_netlink.c
projects / mirror_ubuntu-bionic-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
openvswitch: add ct_clear action
[mirror_ubuntu-bionic-kernel.git] / net / openvswitch / flow_netlink.c
1 /*
2 * Copyright (c) 2007-2017 Nicira, Inc.
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 "flow.h"
22 #include "datapath.h"
23 #include <linux/uaccess.h>
24 #include <linux/netdevice.h>
25 #include <linux/etherdevice.h>
26 #include <linux/if_ether.h>
27 #include <linux/if_vlan.h>
28 #include <net/llc_pdu.h>
29 #include <linux/kernel.h>
30 #include <linux/jhash.h>
31 #include <linux/jiffies.h>
32 #include <linux/llc.h>
33 #include <linux/module.h>
34 #include <linux/in.h>
35 #include <linux/rcupdate.h>
36 #include <linux/if_arp.h>
37 #include <linux/ip.h>
38 #include <linux/ipv6.h>
39 #include <linux/sctp.h>
40 #include <linux/tcp.h>
41 #include <linux/udp.h>
42 #include <linux/icmp.h>
43 #include <linux/icmpv6.h>
44 #include <linux/rculist.h>
45 #include <net/geneve.h>
46 #include <net/ip.h>
47 #include <net/ipv6.h>
48 #include <net/ndisc.h>
49 #include <net/mpls.h>
50 #include <net/vxlan.h>
51 #include <net/erspan.h>
52
53 #include "flow_netlink.h"
54
55 struct ovs_len_tbl {
56 int len;
57 const struct ovs_len_tbl *next;
58 };
59
60 #define OVS_ATTR_NESTED -1
61 #define OVS_ATTR_VARIABLE -2
62
63 static bool actions_may_change_flow(const struct nlattr *actions)
64 {
65 struct nlattr *nla;
66 int rem;
67
68 nla_for_each_nested(nla, actions, rem) {
69 u16 action = nla_type(nla);
70
71 switch (action) {
72 case OVS_ACTION_ATTR_OUTPUT:
73 case OVS_ACTION_ATTR_RECIRC:
74 case OVS_ACTION_ATTR_TRUNC:
75 case OVS_ACTION_ATTR_USERSPACE:
76 break;
77
78 case OVS_ACTION_ATTR_CT:
79 case OVS_ACTION_ATTR_CT_CLEAR:
80 case OVS_ACTION_ATTR_HASH:
81 case OVS_ACTION_ATTR_POP_ETH:
82 case OVS_ACTION_ATTR_POP_MPLS:
83 case OVS_ACTION_ATTR_POP_VLAN:
84 case OVS_ACTION_ATTR_PUSH_ETH:
85 case OVS_ACTION_ATTR_PUSH_MPLS:
86 case OVS_ACTION_ATTR_PUSH_VLAN:
87 case OVS_ACTION_ATTR_SAMPLE:
88 case OVS_ACTION_ATTR_SET:
89 case OVS_ACTION_ATTR_SET_MASKED:
90 default:
91 return true;
92 }
93 }
94 return false;
95 }
96
97 static void update_range(struct sw_flow_match *match,
98 size_t offset, size_t size, bool is_mask)
99 {
100 struct sw_flow_key_range *range;
101 size_t start = rounddown(offset, sizeof(long));
102 size_t end = roundup(offset + size, sizeof(long));
103
104 if (!is_mask)
105 range = &match->range;
106 else
107 range = &match->mask->range;
108
109 if (range->start == range->end) {
110 range->start = start;
111 range->end = end;
112 return;
113 }
114
115 if (range->start > start)
116 range->start = start;
117
118 if (range->end < end)
119 range->end = end;
120 }
121
122 #define SW_FLOW_KEY_PUT(match, field, value, is_mask) \
123 do { \
124 update_range(match, offsetof(struct sw_flow_key, field), \
125 sizeof((match)->key->field), is_mask); \
126 if (is_mask) \
127 (match)->mask->key.field = value; \
128 else \
129 (match)->key->field = value; \
130 } while (0)
131
132 #define SW_FLOW_KEY_MEMCPY_OFFSET(match, offset, value_p, len, is_mask) \
133 do { \
134 update_range(match, offset, len, is_mask); \
135 if (is_mask) \
136 memcpy((u8 *)&(match)->mask->key + offset, value_p, \
137 len); \
138 else \
139 memcpy((u8 *)(match)->key + offset, value_p, len); \
140 } while (0)
141
142 #define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \
143 SW_FLOW_KEY_MEMCPY_OFFSET(match, offsetof(struct sw_flow_key, field), \
144 value_p, len, is_mask)
145
146 #define SW_FLOW_KEY_MEMSET_FIELD(match, field, value, is_mask) \
147 do { \
148 update_range(match, offsetof(struct sw_flow_key, field), \
149 sizeof((match)->key->field), is_mask); \
150 if (is_mask) \
151 memset((u8 *)&(match)->mask->key.field, value, \
152 sizeof((match)->mask->key.field)); \
153 else \
154 memset((u8 *)&(match)->key->field, value, \
155 sizeof((match)->key->field)); \
156 } while (0)
157
158 static bool match_validate(const struct sw_flow_match *match,
159 u64 key_attrs, u64 mask_attrs, bool log)
160 {
161 u64 key_expected = 0;
162 u64 mask_allowed = key_attrs; /* At most allow all key attributes */
163
164 /* The following mask attributes allowed only if they
165 * pass the validation tests. */
166 mask_allowed &= ~((1 << OVS_KEY_ATTR_IPV4)
167 | (1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4)
168 | (1 << OVS_KEY_ATTR_IPV6)
169 | (1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6)
170 | (1 << OVS_KEY_ATTR_TCP)
171 | (1 << OVS_KEY_ATTR_TCP_FLAGS)
172 | (1 << OVS_KEY_ATTR_UDP)
173 | (1 << OVS_KEY_ATTR_SCTP)
174 | (1 << OVS_KEY_ATTR_ICMP)
175 | (1 << OVS_KEY_ATTR_ICMPV6)
176 | (1 << OVS_KEY_ATTR_ARP)
177 | (1 << OVS_KEY_ATTR_ND)
178 | (1 << OVS_KEY_ATTR_MPLS));
179
180 /* Always allowed mask fields. */
181 mask_allowed |= ((1 << OVS_KEY_ATTR_TUNNEL)
182 | (1 << OVS_KEY_ATTR_IN_PORT)
183 | (1 << OVS_KEY_ATTR_ETHERTYPE));
184
185 /* Check key attributes. */
186 if (match->key->eth.type == htons(ETH_P_ARP)
187 || match->key->eth.type == htons(ETH_P_RARP)) {
188 key_expected |= 1 << OVS_KEY_ATTR_ARP;
189 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
190 mask_allowed |= 1 << OVS_KEY_ATTR_ARP;
191 }
192
193 if (eth_p_mpls(match->key->eth.type)) {
194 key_expected |= 1 << OVS_KEY_ATTR_MPLS;
195 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
196 mask_allowed |= 1 << OVS_KEY_ATTR_MPLS;
197 }
198
199 if (match->key->eth.type == htons(ETH_P_IP)) {
200 key_expected |= 1 << OVS_KEY_ATTR_IPV4;
201 if (match->mask && match->mask->key.eth.type == htons(0xffff)) {
202 mask_allowed |= 1 << OVS_KEY_ATTR_IPV4;
203 mask_allowed |= 1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4;
204 }
205
206 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
207 if (match->key->ip.proto == IPPROTO_UDP) {
208 key_expected |= 1 << OVS_KEY_ATTR_UDP;
209 if (match->mask && (match->mask->key.ip.proto == 0xff))
210 mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
211 }
212
213 if (match->key->ip.proto == IPPROTO_SCTP) {
214 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
215 if (match->mask && (match->mask->key.ip.proto == 0xff))
216 mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
217 }
218
219 if (match->key->ip.proto == IPPROTO_TCP) {
220 key_expected |= 1 << OVS_KEY_ATTR_TCP;
221 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
222 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
223 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
224 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
225 }
226 }
227
228 if (match->key->ip.proto == IPPROTO_ICMP) {
229 key_expected |= 1 << OVS_KEY_ATTR_ICMP;
230 if (match->mask && (match->mask->key.ip.proto == 0xff))
231 mask_allowed |= 1 << OVS_KEY_ATTR_ICMP;
232 }
233 }
234 }
235
236 if (match->key->eth.type == htons(ETH_P_IPV6)) {
237 key_expected |= 1 << OVS_KEY_ATTR_IPV6;
238 if (match->mask && match->mask->key.eth.type == htons(0xffff)) {
239 mask_allowed |= 1 << OVS_KEY_ATTR_IPV6;
240 mask_allowed |= 1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6;
241 }
242
243 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
244 if (match->key->ip.proto == IPPROTO_UDP) {
245 key_expected |= 1 << OVS_KEY_ATTR_UDP;
246 if (match->mask && (match->mask->key.ip.proto == 0xff))
247 mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
248 }
249
250 if (match->key->ip.proto == IPPROTO_SCTP) {
251 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
252 if (match->mask && (match->mask->key.ip.proto == 0xff))
253 mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
254 }
255
256 if (match->key->ip.proto == IPPROTO_TCP) {
257 key_expected |= 1 << OVS_KEY_ATTR_TCP;
258 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
259 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
260 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
261 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
262 }
263 }
264
265 if (match->key->ip.proto == IPPROTO_ICMPV6) {
266 key_expected |= 1 << OVS_KEY_ATTR_ICMPV6;
267 if (match->mask && (match->mask->key.ip.proto == 0xff))
268 mask_allowed |= 1 << OVS_KEY_ATTR_ICMPV6;
269
270 if (match->key->tp.src ==
271 htons(NDISC_NEIGHBOUR_SOLICITATION) ||
272 match->key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) {
273 key_expected |= 1 << OVS_KEY_ATTR_ND;
274 /* Original direction conntrack tuple
275 * uses the same space as the ND fields
276 * in the key, so both are not allowed
277 * at the same time.
278 */
279 mask_allowed &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6);
280 if (match->mask && (match->mask->key.tp.src == htons(0xff)))
281 mask_allowed |= 1 << OVS_KEY_ATTR_ND;
282 }
283 }
284 }
285 }
286
287 if ((key_attrs & key_expected) != key_expected) {
288 /* Key attributes check failed. */
289 OVS_NLERR(log, "Missing key (keys=%llx, expected=%llx)",
290 (unsigned long long)key_attrs,
291 (unsigned long long)key_expected);
292 return false;
293 }
294
295 if ((mask_attrs & mask_allowed) != mask_attrs) {
296 /* Mask attributes check failed. */
297 OVS_NLERR(log, "Unexpected mask (mask=%llx, allowed=%llx)",
298 (unsigned long long)mask_attrs,
299 (unsigned long long)mask_allowed);
300 return false;
301 }
302
303 return true;
304 }
305
306 size_t ovs_tun_key_attr_size(void)
307 {
308 /* Whenever adding new OVS_TUNNEL_KEY_ FIELDS, we should consider
309 * updating this function.
310 */
311 return nla_total_size_64bit(8) /* OVS_TUNNEL_KEY_ATTR_ID */
312 + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_SRC */
313 + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_DST */
314 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */
315 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */
316 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */
317 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */
318 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_OAM */
319 + nla_total_size(256) /* OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS */
320 /* OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS is mutually exclusive with
321 * OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS and covered by it.
322 */
323 + nla_total_size(2) /* OVS_TUNNEL_KEY_ATTR_TP_SRC */
324 + nla_total_size(2) /* OVS_TUNNEL_KEY_ATTR_TP_DST */
325 + nla_total_size(4); /* OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS */
326 }
327
328 size_t ovs_key_attr_size(void)
329 {
330 /* Whenever adding new OVS_KEY_ FIELDS, we should consider
331 * updating this function.
332 */
333 BUILD_BUG_ON(OVS_KEY_ATTR_TUNNEL_INFO != 28);
334
335 return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */
336 + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */
337 + ovs_tun_key_attr_size()
338 + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */
339 + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */
340 + nla_total_size(4) /* OVS_KEY_ATTR_DP_HASH */
341 + nla_total_size(4) /* OVS_KEY_ATTR_RECIRC_ID */
342 + nla_total_size(4) /* OVS_KEY_ATTR_CT_STATE */
343 + nla_total_size(2) /* OVS_KEY_ATTR_CT_ZONE */
344 + nla_total_size(4) /* OVS_KEY_ATTR_CT_MARK */
345 + nla_total_size(16) /* OVS_KEY_ATTR_CT_LABELS */
346 + nla_total_size(40) /* OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6 */
347 + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */
348 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
349 + nla_total_size(4) /* OVS_KEY_ATTR_VLAN */
350 + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */
351 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
352 + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */
353 + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */
354 + nla_total_size(28); /* OVS_KEY_ATTR_ND */
355 }
356
357 static const struct ovs_len_tbl ovs_vxlan_ext_key_lens[OVS_VXLAN_EXT_MAX + 1] = {
358 [OVS_VXLAN_EXT_GBP] = { .len = sizeof(u32) },
359 };
360
361 static const struct ovs_len_tbl ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = {
362 [OVS_TUNNEL_KEY_ATTR_ID] = { .len = sizeof(u64) },
363 [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = { .len = sizeof(u32) },
364 [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = { .len = sizeof(u32) },
365 [OVS_TUNNEL_KEY_ATTR_TOS] = { .len = 1 },
366 [OVS_TUNNEL_KEY_ATTR_TTL] = { .len = 1 },
367 [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = { .len = 0 },
368 [OVS_TUNNEL_KEY_ATTR_CSUM] = { .len = 0 },
369 [OVS_TUNNEL_KEY_ATTR_TP_SRC] = { .len = sizeof(u16) },
370 [OVS_TUNNEL_KEY_ATTR_TP_DST] = { .len = sizeof(u16) },
371 [OVS_TUNNEL_KEY_ATTR_OAM] = { .len = 0 },
372 [OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS] = { .len = OVS_ATTR_VARIABLE },
373 [OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS] = { .len = OVS_ATTR_NESTED,
374 .next = ovs_vxlan_ext_key_lens },
375 [OVS_TUNNEL_KEY_ATTR_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
376 [OVS_TUNNEL_KEY_ATTR_IPV6_DST] = { .len = sizeof(struct in6_addr) },
377 [OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS] = { .len = sizeof(u32) },
378 };
379
380 /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */
381 static const struct ovs_len_tbl ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = {
382 [OVS_KEY_ATTR_ENCAP] = { .len = OVS_ATTR_NESTED },
383 [OVS_KEY_ATTR_PRIORITY] = { .len = sizeof(u32) },
384 [OVS_KEY_ATTR_IN_PORT] = { .len = sizeof(u32) },
385 [OVS_KEY_ATTR_SKB_MARK] = { .len = sizeof(u32) },
386 [OVS_KEY_ATTR_ETHERNET] = { .len = sizeof(struct ovs_key_ethernet) },
387 [OVS_KEY_ATTR_VLAN] = { .len = sizeof(__be16) },
388 [OVS_KEY_ATTR_ETHERTYPE] = { .len = sizeof(__be16) },
389 [OVS_KEY_ATTR_IPV4] = { .len = sizeof(struct ovs_key_ipv4) },
390 [OVS_KEY_ATTR_IPV6] = { .len = sizeof(struct ovs_key_ipv6) },
391 [OVS_KEY_ATTR_TCP] = { .len = sizeof(struct ovs_key_tcp) },
392 [OVS_KEY_ATTR_TCP_FLAGS] = { .len = sizeof(__be16) },
393 [OVS_KEY_ATTR_UDP] = { .len = sizeof(struct ovs_key_udp) },
394 [OVS_KEY_ATTR_SCTP] = { .len = sizeof(struct ovs_key_sctp) },
395 [OVS_KEY_ATTR_ICMP] = { .len = sizeof(struct ovs_key_icmp) },
396 [OVS_KEY_ATTR_ICMPV6] = { .len = sizeof(struct ovs_key_icmpv6) },
397 [OVS_KEY_ATTR_ARP] = { .len = sizeof(struct ovs_key_arp) },
398 [OVS_KEY_ATTR_ND] = { .len = sizeof(struct ovs_key_nd) },
399 [OVS_KEY_ATTR_RECIRC_ID] = { .len = sizeof(u32) },
400 [OVS_KEY_ATTR_DP_HASH] = { .len = sizeof(u32) },
401 [OVS_KEY_ATTR_TUNNEL] = { .len = OVS_ATTR_NESTED,
402 .next = ovs_tunnel_key_lens, },
403 [OVS_KEY_ATTR_MPLS] = { .len = sizeof(struct ovs_key_mpls) },
404 [OVS_KEY_ATTR_CT_STATE] = { .len = sizeof(u32) },
405 [OVS_KEY_ATTR_CT_ZONE] = { .len = sizeof(u16) },
406 [OVS_KEY_ATTR_CT_MARK] = { .len = sizeof(u32) },
407 [OVS_KEY_ATTR_CT_LABELS] = { .len = sizeof(struct ovs_key_ct_labels) },
408 [OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4] = {
409 .len = sizeof(struct ovs_key_ct_tuple_ipv4) },
410 [OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6] = {
411 .len = sizeof(struct ovs_key_ct_tuple_ipv6) },
412 };
413
414 static bool check_attr_len(unsigned int attr_len, unsigned int expected_len)
415 {
416 return expected_len == attr_len ||
417 expected_len == OVS_ATTR_NESTED ||
418 expected_len == OVS_ATTR_VARIABLE;
419 }
420
421 static bool is_all_zero(const u8 *fp, size_t size)
422 {
423 int i;
424
425 if (!fp)
426 return false;
427
428 for (i = 0; i < size; i++)
429 if (fp[i])
430 return false;
431
432 return true;
433 }
434
435 static int __parse_flow_nlattrs(const struct nlattr *attr,
436 const struct nlattr *a[],
437 u64 *attrsp, bool log, bool nz)
438 {
439 const struct nlattr *nla;
440 u64 attrs;
441 int rem;
442
443 attrs = *attrsp;
444 nla_for_each_nested(nla, attr, rem) {
445 u16 type = nla_type(nla);
446 int expected_len;
447
448 if (type > OVS_KEY_ATTR_MAX) {
449 OVS_NLERR(log, "Key type %d is out of range max %d",
450 type, OVS_KEY_ATTR_MAX);
451 return -EINVAL;
452 }
453
454 if (attrs & (1 << type)) {
455 OVS_NLERR(log, "Duplicate key (type %d).", type);
456 return -EINVAL;
457 }
458
459 expected_len = ovs_key_lens[type].len;
460 if (!check_attr_len(nla_len(nla), expected_len)) {
461 OVS_NLERR(log, "Key %d has unexpected len %d expected %d",
462 type, nla_len(nla), expected_len);
463 return -EINVAL;
464 }
465
466 if (!nz || !is_all_zero(nla_data(nla), expected_len)) {
467 attrs |= 1 << type;
468 a[type] = nla;
469 }
470 }
471 if (rem) {
472 OVS_NLERR(log, "Message has %d unknown bytes.", rem);
473 return -EINVAL;
474 }
475
476 *attrsp = attrs;
477 return 0;
478 }
479
480 static int parse_flow_mask_nlattrs(const struct nlattr *attr,
481 const struct nlattr *a[], u64 *attrsp,
482 bool log)
483 {
484 return __parse_flow_nlattrs(attr, a, attrsp, log, true);
485 }
486
487 int parse_flow_nlattrs(const struct nlattr *attr, const struct nlattr *a[],
488 u64 *attrsp, bool log)
489 {
490 return __parse_flow_nlattrs(attr, a, attrsp, log, false);
491 }
492
493 static int genev_tun_opt_from_nlattr(const struct nlattr *a,
494 struct sw_flow_match *match, bool is_mask,
495 bool log)
496 {
497 unsigned long opt_key_offset;
498
499 if (nla_len(a) > sizeof(match->key->tun_opts)) {
500 OVS_NLERR(log, "Geneve option length err (len %d, max %zu).",
501 nla_len(a), sizeof(match->key->tun_opts));
502 return -EINVAL;
503 }
504
505 if (nla_len(a) % 4 != 0) {
506 OVS_NLERR(log, "Geneve opt len %d is not a multiple of 4.",
507 nla_len(a));
508 return -EINVAL;
509 }
510
511 /* We need to record the length of the options passed
512 * down, otherwise packets with the same format but
513 * additional options will be silently matched.
514 */
515 if (!is_mask) {
516 SW_FLOW_KEY_PUT(match, tun_opts_len, nla_len(a),
517 false);
518 } else {
519 /* This is somewhat unusual because it looks at
520 * both the key and mask while parsing the
521 * attributes (and by extension assumes the key
522 * is parsed first). Normally, we would verify
523 * that each is the correct length and that the
524 * attributes line up in the validate function.
525 * However, that is difficult because this is
526 * variable length and we won't have the
527 * information later.
528 */
529 if (match->key->tun_opts_len != nla_len(a)) {
530 OVS_NLERR(log, "Geneve option len %d != mask len %d",
531 match->key->tun_opts_len, nla_len(a));
532 return -EINVAL;
533 }
534
535 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
536 }
537
538 opt_key_offset = TUN_METADATA_OFFSET(nla_len(a));
539 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, nla_data(a),
540 nla_len(a), is_mask);
541 return 0;
542 }
543
544 static int vxlan_tun_opt_from_nlattr(const struct nlattr *attr,
545 struct sw_flow_match *match, bool is_mask,
546 bool log)
547 {
548 struct nlattr *a;
549 int rem;
550 unsigned long opt_key_offset;
551 struct vxlan_metadata opts;
552
553 BUILD_BUG_ON(sizeof(opts) > sizeof(match->key->tun_opts));
554
555 memset(&opts, 0, sizeof(opts));
556 nla_for_each_nested(a, attr, rem) {
557 int type = nla_type(a);
558
559 if (type > OVS_VXLAN_EXT_MAX) {
560 OVS_NLERR(log, "VXLAN extension %d out of range max %d",
561 type, OVS_VXLAN_EXT_MAX);
562 return -EINVAL;
563 }
564
565 if (!check_attr_len(nla_len(a),
566 ovs_vxlan_ext_key_lens[type].len)) {
567 OVS_NLERR(log, "VXLAN extension %d has unexpected len %d expected %d",
568 type, nla_len(a),
569 ovs_vxlan_ext_key_lens[type].len);
570 return -EINVAL;
571 }
572
573 switch (type) {
574 case OVS_VXLAN_EXT_GBP:
575 opts.gbp = nla_get_u32(a);
576 break;
577 default:
578 OVS_NLERR(log, "Unknown VXLAN extension attribute %d",
579 type);
580 return -EINVAL;
581 }
582 }
583 if (rem) {
584 OVS_NLERR(log, "VXLAN extension message has %d unknown bytes.",
585 rem);
586 return -EINVAL;
587 }
588
589 if (!is_mask)
590 SW_FLOW_KEY_PUT(match, tun_opts_len, sizeof(opts), false);
591 else
592 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
593
594 opt_key_offset = TUN_METADATA_OFFSET(sizeof(opts));
595 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, &opts, sizeof(opts),
596 is_mask);
597 return 0;
598 }
599
600 static int erspan_tun_opt_from_nlattr(const struct nlattr *attr,
601 struct sw_flow_match *match, bool is_mask,
602 bool log)
603 {
604 unsigned long opt_key_offset;
605 struct erspan_metadata opts;
606
607 BUILD_BUG_ON(sizeof(opts) > sizeof(match->key->tun_opts));
608
609 memset(&opts, 0, sizeof(opts));
610 opts.index = nla_get_be32(attr);
611
612 /* Index has only 20-bit */
613 if (ntohl(opts.index) & ~INDEX_MASK) {
614 OVS_NLERR(log, "ERSPAN index number %x too large.",
615 ntohl(opts.index));
616 return -EINVAL;
617 }
618
619 SW_FLOW_KEY_PUT(match, tun_opts_len, sizeof(opts), is_mask);
620 opt_key_offset = TUN_METADATA_OFFSET(sizeof(opts));
621 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, &opts, sizeof(opts),
622 is_mask);
623
624 return 0;
625 }
626
627 static int ip_tun_from_nlattr(const struct nlattr *attr,
628 struct sw_flow_match *match, bool is_mask,
629 bool log)
630 {
631 bool ttl = false, ipv4 = false, ipv6 = false;
632 __be16 tun_flags = 0;
633 int opts_type = 0;
634 struct nlattr *a;
635 int rem;
636
637 nla_for_each_nested(a, attr, rem) {
638 int type = nla_type(a);
639 int err;
640
641 if (type > OVS_TUNNEL_KEY_ATTR_MAX) {
642 OVS_NLERR(log, "Tunnel attr %d out of range max %d",
643 type, OVS_TUNNEL_KEY_ATTR_MAX);
644 return -EINVAL;
645 }
646
647 if (!check_attr_len(nla_len(a),
648 ovs_tunnel_key_lens[type].len)) {
649 OVS_NLERR(log, "Tunnel attr %d has unexpected len %d expected %d",
650 type, nla_len(a), ovs_tunnel_key_lens[type].len);
651 return -EINVAL;
652 }
653
654 switch (type) {
655 case OVS_TUNNEL_KEY_ATTR_ID:
656 SW_FLOW_KEY_PUT(match, tun_key.tun_id,
657 nla_get_be64(a), is_mask);
658 tun_flags |= TUNNEL_KEY;
659 break;
660 case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
661 SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.src,
662 nla_get_in_addr(a), is_mask);
663 ipv4 = true;
664 break;
665 case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
666 SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.dst,
667 nla_get_in_addr(a), is_mask);
668 ipv4 = true;
669 break;
670 case OVS_TUNNEL_KEY_ATTR_IPV6_SRC:
671 SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.src,
672 nla_get_in6_addr(a), is_mask);
673 ipv6 = true;
674 break;
675 case OVS_TUNNEL_KEY_ATTR_IPV6_DST:
676 SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.dst,
677 nla_get_in6_addr(a), is_mask);
678 ipv6 = true;
679 break;
680 case OVS_TUNNEL_KEY_ATTR_TOS:
681 SW_FLOW_KEY_PUT(match, tun_key.tos,
682 nla_get_u8(a), is_mask);
683 break;
684 case OVS_TUNNEL_KEY_ATTR_TTL:
685 SW_FLOW_KEY_PUT(match, tun_key.ttl,
686 nla_get_u8(a), is_mask);
687 ttl = true;
688 break;
689 case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
690 tun_flags |= TUNNEL_DONT_FRAGMENT;
691 break;
692 case OVS_TUNNEL_KEY_ATTR_CSUM:
693 tun_flags |= TUNNEL_CSUM;
694 break;
695 case OVS_TUNNEL_KEY_ATTR_TP_SRC:
696 SW_FLOW_KEY_PUT(match, tun_key.tp_src,
697 nla_get_be16(a), is_mask);
698 break;
699 case OVS_TUNNEL_KEY_ATTR_TP_DST:
700 SW_FLOW_KEY_PUT(match, tun_key.tp_dst,
701 nla_get_be16(a), is_mask);
702 break;
703 case OVS_TUNNEL_KEY_ATTR_OAM:
704 tun_flags |= TUNNEL_OAM;
705 break;
706 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
707 if (opts_type) {
708 OVS_NLERR(log, "Multiple metadata blocks provided");
709 return -EINVAL;
710 }
711
712 err = genev_tun_opt_from_nlattr(a, match, is_mask, log);
713 if (err)
714 return err;
715
716 tun_flags |= TUNNEL_GENEVE_OPT;
717 opts_type = type;
718 break;
719 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
720 if (opts_type) {
721 OVS_NLERR(log, "Multiple metadata blocks provided");
722 return -EINVAL;
723 }
724
725 err = vxlan_tun_opt_from_nlattr(a, match, is_mask, log);
726 if (err)
727 return err;
728
729 tun_flags |= TUNNEL_VXLAN_OPT;
730 opts_type = type;
731 break;
732 case OVS_TUNNEL_KEY_ATTR_PAD:
733 break;
734 case OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS:
735 if (opts_type) {
736 OVS_NLERR(log, "Multiple metadata blocks provided");
737 return -EINVAL;
738 }
739
740 err = erspan_tun_opt_from_nlattr(a, match, is_mask, log);
741 if (err)
742 return err;
743
744 tun_flags |= TUNNEL_ERSPAN_OPT;
745 opts_type = type;
746 break;
747 default:
748 OVS_NLERR(log, "Unknown IP tunnel attribute %d",
749 type);
750 return -EINVAL;
751 }
752 }
753
754 SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask);
755 if (is_mask)
756 SW_FLOW_KEY_MEMSET_FIELD(match, tun_proto, 0xff, true);
757 else
758 SW_FLOW_KEY_PUT(match, tun_proto, ipv6 ? AF_INET6 : AF_INET,
759 false);
760
761 if (rem > 0) {
762 OVS_NLERR(log, "IP tunnel attribute has %d unknown bytes.",
763 rem);
764 return -EINVAL;
765 }
766
767 if (ipv4 && ipv6) {
768 OVS_NLERR(log, "Mixed IPv4 and IPv6 tunnel attributes");
769 return -EINVAL;
770 }
771
772 if (!is_mask) {
773 if (!ipv4 && !ipv6) {
774 OVS_NLERR(log, "IP tunnel dst address not specified");
775 return -EINVAL;
776 }
777 if (ipv4 && !match->key->tun_key.u.ipv4.dst) {
778 OVS_NLERR(log, "IPv4 tunnel dst address is zero");
779 return -EINVAL;
780 }
781 if (ipv6 && ipv6_addr_any(&match->key->tun_key.u.ipv6.dst)) {
782 OVS_NLERR(log, "IPv6 tunnel dst address is zero");
783 return -EINVAL;
784 }
785
786 if (!ttl) {
787 OVS_NLERR(log, "IP tunnel TTL not specified.");
788 return -EINVAL;
789 }
790 }
791
792 return opts_type;
793 }
794
795 static int vxlan_opt_to_nlattr(struct sk_buff *skb,
796 const void *tun_opts, int swkey_tun_opts_len)
797 {
798 const struct vxlan_metadata *opts = tun_opts;
799 struct nlattr *nla;
800
801 nla = nla_nest_start(skb, OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS);
802 if (!nla)
803 return -EMSGSIZE;
804
805 if (nla_put_u32(skb, OVS_VXLAN_EXT_GBP, opts->gbp) < 0)
806 return -EMSGSIZE;
807
808 nla_nest_end(skb, nla);
809 return 0;
810 }
811
812 static int __ip_tun_to_nlattr(struct sk_buff *skb,
813 const struct ip_tunnel_key *output,
814 const void *tun_opts, int swkey_tun_opts_len,
815 unsigned short tun_proto)
816 {
817 if (output->tun_flags & TUNNEL_KEY &&
818 nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id,
819 OVS_TUNNEL_KEY_ATTR_PAD))
820 return -EMSGSIZE;
821 switch (tun_proto) {
822 case AF_INET:
823 if (output->u.ipv4.src &&
824 nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC,
825 output->u.ipv4.src))
826 return -EMSGSIZE;
827 if (output->u.ipv4.dst &&
828 nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST,
829 output->u.ipv4.dst))
830 return -EMSGSIZE;
831 break;
832 case AF_INET6:
833 if (!ipv6_addr_any(&output->u.ipv6.src) &&
834 nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_SRC,
835 &output->u.ipv6.src))
836 return -EMSGSIZE;
837 if (!ipv6_addr_any(&output->u.ipv6.dst) &&
838 nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_DST,
839 &output->u.ipv6.dst))
840 return -EMSGSIZE;
841 break;
842 }
843 if (output->tos &&
844 nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->tos))
845 return -EMSGSIZE;
846 if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ttl))
847 return -EMSGSIZE;
848 if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) &&
849 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT))
850 return -EMSGSIZE;
851 if ((output->tun_flags & TUNNEL_CSUM) &&
852 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM))
853 return -EMSGSIZE;
854 if (output->tp_src &&
855 nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_SRC, output->tp_src))
856 return -EMSGSIZE;
857 if (output->tp_dst &&
858 nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_DST, output->tp_dst))
859 return -EMSGSIZE;
860 if ((output->tun_flags & TUNNEL_OAM) &&
861 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM))
862 return -EMSGSIZE;
863 if (swkey_tun_opts_len) {
864 if (output->tun_flags & TUNNEL_GENEVE_OPT &&
865 nla_put(skb, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS,
866 swkey_tun_opts_len, tun_opts))
867 return -EMSGSIZE;
868 else if (output->tun_flags & TUNNEL_VXLAN_OPT &&
869 vxlan_opt_to_nlattr(skb, tun_opts, swkey_tun_opts_len))
870 return -EMSGSIZE;
871 else if (output->tun_flags & TUNNEL_ERSPAN_OPT &&
872 nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS,
873 ((struct erspan_metadata *)tun_opts)->index))
874 return -EMSGSIZE;
875 }
876
877 return 0;
878 }
879
880 static int ip_tun_to_nlattr(struct sk_buff *skb,
881 const struct ip_tunnel_key *output,
882 const void *tun_opts, int swkey_tun_opts_len,
883 unsigned short tun_proto)
884 {
885 struct nlattr *nla;
886 int err;
887
888 nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL);
889 if (!nla)
890 return -EMSGSIZE;
891
892 err = __ip_tun_to_nlattr(skb, output, tun_opts, swkey_tun_opts_len,
893 tun_proto);
894 if (err)
895 return err;
896
897 nla_nest_end(skb, nla);
898 return 0;
899 }
900
901 int ovs_nla_put_tunnel_info(struct sk_buff *skb,
902 struct ip_tunnel_info *tun_info)
903 {
904 return __ip_tun_to_nlattr(skb, &tun_info->key,
905 ip_tunnel_info_opts(tun_info),
906 tun_info->options_len,
907 ip_tunnel_info_af(tun_info));
908 }
909
910 static int encode_vlan_from_nlattrs(struct sw_flow_match *match,
911 const struct nlattr *a[],
912 bool is_mask, bool inner)
913 {
914 __be16 tci = 0;
915 __be16 tpid = 0;
916
917 if (a[OVS_KEY_ATTR_VLAN])
918 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
919
920 if (a[OVS_KEY_ATTR_ETHERTYPE])
921 tpid = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
922
923 if (likely(!inner)) {
924 SW_FLOW_KEY_PUT(match, eth.vlan.tpid, tpid, is_mask);
925 SW_FLOW_KEY_PUT(match, eth.vlan.tci, tci, is_mask);
926 } else {
927 SW_FLOW_KEY_PUT(match, eth.cvlan.tpid, tpid, is_mask);
928 SW_FLOW_KEY_PUT(match, eth.cvlan.tci, tci, is_mask);
929 }
930 return 0;
931 }
932
933 static int validate_vlan_from_nlattrs(const struct sw_flow_match *match,
934 u64 key_attrs, bool inner,
935 const struct nlattr **a, bool log)
936 {
937 __be16 tci = 0;
938
939 if (!((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) &&
940 (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) &&
941 eth_type_vlan(nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE])))) {
942 /* Not a VLAN. */
943 return 0;
944 }
945
946 if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) &&
947 (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) {
948 OVS_NLERR(log, "Invalid %s frame", (inner) ? "C-VLAN" : "VLAN");
949 return -EINVAL;
950 }
951
952 if (a[OVS_KEY_ATTR_VLAN])
953 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
954
955 if (!(tci & htons(VLAN_TAG_PRESENT))) {
956 if (tci) {
957 OVS_NLERR(log, "%s TCI does not have VLAN_TAG_PRESENT bit set.",
958 (inner) ? "C-VLAN" : "VLAN");
959 return -EINVAL;
960 } else if (nla_len(a[OVS_KEY_ATTR_ENCAP])) {
961 /* Corner case for truncated VLAN header. */
962 OVS_NLERR(log, "Truncated %s header has non-zero encap attribute.",
963 (inner) ? "C-VLAN" : "VLAN");
964 return -EINVAL;
965 }
966 }
967
968 return 1;
969 }
970
971 static int validate_vlan_mask_from_nlattrs(const struct sw_flow_match *match,
972 u64 key_attrs, bool inner,
973 const struct nlattr **a, bool log)
974 {
975 __be16 tci = 0;
976 __be16 tpid = 0;
977 bool encap_valid = !!(match->key->eth.vlan.tci &
978 htons(VLAN_TAG_PRESENT));
979 bool i_encap_valid = !!(match->key->eth.cvlan.tci &
980 htons(VLAN_TAG_PRESENT));
981
982 if (!(key_attrs & (1 << OVS_KEY_ATTR_ENCAP))) {
983 /* Not a VLAN. */
984 return 0;
985 }
986
987 if ((!inner && !encap_valid) || (inner && !i_encap_valid)) {
988 OVS_NLERR(log, "Encap mask attribute is set for non-%s frame.",
989 (inner) ? "C-VLAN" : "VLAN");
990 return -EINVAL;
991 }
992
993 if (a[OVS_KEY_ATTR_VLAN])
994 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
995
996 if (a[OVS_KEY_ATTR_ETHERTYPE])
997 tpid = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
998
999 if (tpid != htons(0xffff)) {
1000 OVS_NLERR(log, "Must have an exact match on %s TPID (mask=%x).",
1001 (inner) ? "C-VLAN" : "VLAN", ntohs(tpid));
1002 return -EINVAL;
1003 }
1004 if (!(tci & htons(VLAN_TAG_PRESENT))) {
1005 OVS_NLERR(log, "%s TCI mask does not have exact match for VLAN_TAG_PRESENT bit.",
1006 (inner) ? "C-VLAN" : "VLAN");
1007 return -EINVAL;
1008 }
1009
1010 return 1;
1011 }
1012
1013 static int __parse_vlan_from_nlattrs(struct sw_flow_match *match,
1014 u64 *key_attrs, bool inner,
1015 const struct nlattr **a, bool is_mask,
1016 bool log)
1017 {
1018 int err;
1019 const struct nlattr *encap;
1020
1021 if (!is_mask)
1022 err = validate_vlan_from_nlattrs(match, *key_attrs, inner,
1023 a, log);
1024 else
1025 err = validate_vlan_mask_from_nlattrs(match, *key_attrs, inner,
1026 a, log);
1027 if (err <= 0)
1028 return err;
1029
1030 err = encode_vlan_from_nlattrs(match, a, is_mask, inner);
1031 if (err)
1032 return err;
1033
1034 *key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP);
1035 *key_attrs &= ~(1 << OVS_KEY_ATTR_VLAN);
1036 *key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
1037
1038 encap = a[OVS_KEY_ATTR_ENCAP];
1039
1040 if (!is_mask)
1041 err = parse_flow_nlattrs(encap, a, key_attrs, log);
1042 else
1043 err = parse_flow_mask_nlattrs(encap, a, key_attrs, log);
1044
1045 return err;
1046 }
1047
1048 static int parse_vlan_from_nlattrs(struct sw_flow_match *match,
1049 u64 *key_attrs, const struct nlattr **a,
1050 bool is_mask, bool log)
1051 {
1052 int err;
1053 bool encap_valid = false;
1054
1055 err = __parse_vlan_from_nlattrs(match, key_attrs, false, a,
1056 is_mask, log);
1057 if (err)
1058 return err;
1059
1060 encap_valid = !!(match->key->eth.vlan.tci & htons(VLAN_TAG_PRESENT));
1061 if (encap_valid) {
1062 err = __parse_vlan_from_nlattrs(match, key_attrs, true, a,
1063 is_mask, log);
1064 if (err)
1065 return err;
1066 }
1067
1068 return 0;
1069 }
1070
1071 static int parse_eth_type_from_nlattrs(struct sw_flow_match *match,
1072 u64 *attrs, const struct nlattr **a,
1073 bool is_mask, bool log)
1074 {
1075 __be16 eth_type;
1076
1077 eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
1078 if (is_mask) {
1079 /* Always exact match EtherType. */
1080 eth_type = htons(0xffff);
1081 } else if (!eth_proto_is_802_3(eth_type)) {
1082 OVS_NLERR(log, "EtherType %x is less than min %x",
1083 ntohs(eth_type), ETH_P_802_3_MIN);
1084 return -EINVAL;
1085 }
1086
1087 SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask);
1088 *attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
1089 return 0;
1090 }
1091
1092 static int metadata_from_nlattrs(struct net *net, struct sw_flow_match *match,
1093 u64 *attrs, const struct nlattr **a,
1094 bool is_mask, bool log)
1095 {
1096 u8 mac_proto = MAC_PROTO_ETHERNET;
1097
1098 if (*attrs & (1 << OVS_KEY_ATTR_DP_HASH)) {
1099 u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]);
1100
1101 SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask);
1102 *attrs &= ~(1 << OVS_KEY_ATTR_DP_HASH);
1103 }
1104
1105 if (*attrs & (1 << OVS_KEY_ATTR_RECIRC_ID)) {
1106 u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]);
1107
1108 SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask);
1109 *attrs &= ~(1 << OVS_KEY_ATTR_RECIRC_ID);
1110 }
1111
1112 if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) {
1113 SW_FLOW_KEY_PUT(match, phy.priority,
1114 nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask);
1115 *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY);
1116 }
1117
1118 if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) {
1119 u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]);
1120
1121 if (is_mask) {
1122 in_port = 0xffffffff; /* Always exact match in_port. */
1123 } else if (in_port >= DP_MAX_PORTS) {
1124 OVS_NLERR(log, "Port %d exceeds max allowable %d",
1125 in_port, DP_MAX_PORTS);
1126 return -EINVAL;
1127 }
1128
1129 SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask);
1130 *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT);
1131 } else if (!is_mask) {
1132 SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask);
1133 }
1134
1135 if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) {
1136 uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]);
1137
1138 SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask);
1139 *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK);
1140 }
1141 if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) {
1142 if (ip_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match,
1143 is_mask, log) < 0)
1144 return -EINVAL;
1145 *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL);
1146 }
1147
1148 if (*attrs & (1 << OVS_KEY_ATTR_CT_STATE) &&
1149 ovs_ct_verify(net, OVS_KEY_ATTR_CT_STATE)) {
1150 u32 ct_state = nla_get_u32(a[OVS_KEY_ATTR_CT_STATE]);
1151
1152 if (ct_state & ~CT_SUPPORTED_MASK) {
1153 OVS_NLERR(log, "ct_state flags %08x unsupported",
1154 ct_state);
1155 return -EINVAL;
1156 }
1157
1158 SW_FLOW_KEY_PUT(match, ct_state, ct_state, is_mask);
1159 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_STATE);
1160 }
1161 if (*attrs & (1 << OVS_KEY_ATTR_CT_ZONE) &&
1162 ovs_ct_verify(net, OVS_KEY_ATTR_CT_ZONE)) {
1163 u16 ct_zone = nla_get_u16(a[OVS_KEY_ATTR_CT_ZONE]);
1164
1165 SW_FLOW_KEY_PUT(match, ct_zone, ct_zone, is_mask);
1166 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ZONE);
1167 }
1168 if (*attrs & (1 << OVS_KEY_ATTR_CT_MARK) &&
1169 ovs_ct_verify(net, OVS_KEY_ATTR_CT_MARK)) {
1170 u32 mark = nla_get_u32(a[OVS_KEY_ATTR_CT_MARK]);
1171
1172 SW_FLOW_KEY_PUT(match, ct.mark, mark, is_mask);
1173 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_MARK);
1174 }
1175 if (*attrs & (1 << OVS_KEY_ATTR_CT_LABELS) &&
1176 ovs_ct_verify(net, OVS_KEY_ATTR_CT_LABELS)) {
1177 const struct ovs_key_ct_labels *cl;
1178
1179 cl = nla_data(a[OVS_KEY_ATTR_CT_LABELS]);
1180 SW_FLOW_KEY_MEMCPY(match, ct.labels, cl->ct_labels,
1181 sizeof(*cl), is_mask);
1182 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_LABELS);
1183 }
1184 if (*attrs & (1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4)) {
1185 const struct ovs_key_ct_tuple_ipv4 *ct;
1186
1187 ct = nla_data(a[OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4]);
1188
1189 SW_FLOW_KEY_PUT(match, ipv4.ct_orig.src, ct->ipv4_src, is_mask);
1190 SW_FLOW_KEY_PUT(match, ipv4.ct_orig.dst, ct->ipv4_dst, is_mask);
1191 SW_FLOW_KEY_PUT(match, ct.orig_tp.src, ct->src_port, is_mask);
1192 SW_FLOW_KEY_PUT(match, ct.orig_tp.dst, ct->dst_port, is_mask);
1193 SW_FLOW_KEY_PUT(match, ct_orig_proto, ct->ipv4_proto, is_mask);
1194 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4);
1195 }
1196 if (*attrs & (1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6)) {
1197 const struct ovs_key_ct_tuple_ipv6 *ct;
1198
1199 ct = nla_data(a[OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6]);
1200
1201 SW_FLOW_KEY_MEMCPY(match, ipv6.ct_orig.src, &ct->ipv6_src,
1202 sizeof(match->key->ipv6.ct_orig.src),
1203 is_mask);
1204 SW_FLOW_KEY_MEMCPY(match, ipv6.ct_orig.dst, &ct->ipv6_dst,
1205 sizeof(match->key->ipv6.ct_orig.dst),
1206 is_mask);
1207 SW_FLOW_KEY_PUT(match, ct.orig_tp.src, ct->src_port, is_mask);
1208 SW_FLOW_KEY_PUT(match, ct.orig_tp.dst, ct->dst_port, is_mask);
1209 SW_FLOW_KEY_PUT(match, ct_orig_proto, ct->ipv6_proto, is_mask);
1210 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6);
1211 }
1212
1213 /* For layer 3 packets the Ethernet type is provided
1214 * and treated as metadata but no MAC addresses are provided.
1215 */
1216 if (!(*attrs & (1ULL << OVS_KEY_ATTR_ETHERNET)) &&
1217 (*attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)))
1218 mac_proto = MAC_PROTO_NONE;
1219
1220 /* Always exact match mac_proto */
1221 SW_FLOW_KEY_PUT(match, mac_proto, is_mask ? 0xff : mac_proto, is_mask);
1222
1223 if (mac_proto == MAC_PROTO_NONE)
1224 return parse_eth_type_from_nlattrs(match, attrs, a, is_mask,
1225 log);
1226
1227 return 0;
1228 }
1229
1230 static int ovs_key_from_nlattrs(struct net *net, struct sw_flow_match *match,
1231 u64 attrs, const struct nlattr **a,
1232 bool is_mask, bool log)
1233 {
1234 int err;
1235
1236 err = metadata_from_nlattrs(net, match, &attrs, a, is_mask, log);
1237 if (err)
1238 return err;
1239
1240 if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) {
1241 const struct ovs_key_ethernet *eth_key;
1242
1243 eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]);
1244 SW_FLOW_KEY_MEMCPY(match, eth.src,
1245 eth_key->eth_src, ETH_ALEN, is_mask);
1246 SW_FLOW_KEY_MEMCPY(match, eth.dst,
1247 eth_key->eth_dst, ETH_ALEN, is_mask);
1248 attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET);
1249
1250 if (attrs & (1 << OVS_KEY_ATTR_VLAN)) {
1251 /* VLAN attribute is always parsed before getting here since it
1252 * may occur multiple times.
1253 */
1254 OVS_NLERR(log, "VLAN attribute unexpected.");
1255 return -EINVAL;
1256 }
1257
1258 if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) {
1259 err = parse_eth_type_from_nlattrs(match, &attrs, a, is_mask,
1260 log);
1261 if (err)
1262 return err;
1263 } else if (!is_mask) {
1264 SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask);
1265 }
1266 } else if (!match->key->eth.type) {
1267 OVS_NLERR(log, "Either Ethernet header or EtherType is required.");
1268 return -EINVAL;
1269 }
1270
1271 if (attrs & (1 << OVS_KEY_ATTR_IPV4)) {
1272 const struct ovs_key_ipv4 *ipv4_key;
1273
1274 ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]);
1275 if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) {
1276 OVS_NLERR(log, "IPv4 frag type %d is out of range max %d",
1277 ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX);
1278 return -EINVAL;
1279 }
1280 SW_FLOW_KEY_PUT(match, ip.proto,
1281 ipv4_key->ipv4_proto, is_mask);
1282 SW_FLOW_KEY_PUT(match, ip.tos,
1283 ipv4_key->ipv4_tos, is_mask);
1284 SW_FLOW_KEY_PUT(match, ip.ttl,
1285 ipv4_key->ipv4_ttl, is_mask);
1286 SW_FLOW_KEY_PUT(match, ip.frag,
1287 ipv4_key->ipv4_frag, is_mask);
1288 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
1289 ipv4_key->ipv4_src, is_mask);
1290 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
1291 ipv4_key->ipv4_dst, is_mask);
1292 attrs &= ~(1 << OVS_KEY_ATTR_IPV4);
1293 }
1294
1295 if (attrs & (1 << OVS_KEY_ATTR_IPV6)) {
1296 const struct ovs_key_ipv6 *ipv6_key;
1297
1298 ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]);
1299 if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) {
1300 OVS_NLERR(log, "IPv6 frag type %d is out of range max %d",
1301 ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX);
1302 return -EINVAL;
1303 }
1304
1305 if (!is_mask && ipv6_key->ipv6_label & htonl(0xFFF00000)) {
1306 OVS_NLERR(log, "IPv6 flow label %x is out of range (max=%x)",
1307 ntohl(ipv6_key->ipv6_label), (1 << 20) - 1);
1308 return -EINVAL;
1309 }
1310
1311 SW_FLOW_KEY_PUT(match, ipv6.label,
1312 ipv6_key->ipv6_label, is_mask);
1313 SW_FLOW_KEY_PUT(match, ip.proto,
1314 ipv6_key->ipv6_proto, is_mask);
1315 SW_FLOW_KEY_PUT(match, ip.tos,
1316 ipv6_key->ipv6_tclass, is_mask);
1317 SW_FLOW_KEY_PUT(match, ip.ttl,
1318 ipv6_key->ipv6_hlimit, is_mask);
1319 SW_FLOW_KEY_PUT(match, ip.frag,
1320 ipv6_key->ipv6_frag, is_mask);
1321 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src,
1322 ipv6_key->ipv6_src,
1323 sizeof(match->key->ipv6.addr.src),
1324 is_mask);
1325 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst,
1326 ipv6_key->ipv6_dst,
1327 sizeof(match->key->ipv6.addr.dst),
1328 is_mask);
1329
1330 attrs &= ~(1 << OVS_KEY_ATTR_IPV6);
1331 }
1332
1333 if (attrs & (1 << OVS_KEY_ATTR_ARP)) {
1334 const struct ovs_key_arp *arp_key;
1335
1336 arp_key = nla_data(a[OVS_KEY_ATTR_ARP]);
1337 if (!is_mask && (arp_key->arp_op & htons(0xff00))) {
1338 OVS_NLERR(log, "Unknown ARP opcode (opcode=%d).",
1339 arp_key->arp_op);
1340 return -EINVAL;
1341 }
1342
1343 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
1344 arp_key->arp_sip, is_mask);
1345 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
1346 arp_key->arp_tip, is_mask);
1347 SW_FLOW_KEY_PUT(match, ip.proto,
1348 ntohs(arp_key->arp_op), is_mask);
1349 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha,
1350 arp_key->arp_sha, ETH_ALEN, is_mask);
1351 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha,
1352 arp_key->arp_tha, ETH_ALEN, is_mask);
1353
1354 attrs &= ~(1 << OVS_KEY_ATTR_ARP);
1355 }
1356
1357 if (attrs & (1 << OVS_KEY_ATTR_MPLS)) {
1358 const struct ovs_key_mpls *mpls_key;
1359
1360 mpls_key = nla_data(a[OVS_KEY_ATTR_MPLS]);
1361 SW_FLOW_KEY_PUT(match, mpls.top_lse,
1362 mpls_key->mpls_lse, is_mask);
1363
1364 attrs &= ~(1 << OVS_KEY_ATTR_MPLS);
1365 }
1366
1367 if (attrs & (1 << OVS_KEY_ATTR_TCP)) {
1368 const struct ovs_key_tcp *tcp_key;
1369
1370 tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]);
1371 SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask);
1372 SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask);
1373 attrs &= ~(1 << OVS_KEY_ATTR_TCP);
1374 }
1375
1376 if (attrs & (1 << OVS_KEY_ATTR_TCP_FLAGS)) {
1377 SW_FLOW_KEY_PUT(match, tp.flags,
1378 nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]),
1379 is_mask);
1380 attrs &= ~(1 << OVS_KEY_ATTR_TCP_FLAGS);
1381 }
1382
1383 if (attrs & (1 << OVS_KEY_ATTR_UDP)) {
1384 const struct ovs_key_udp *udp_key;
1385
1386 udp_key = nla_data(a[OVS_KEY_ATTR_UDP]);
1387 SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask);
1388 SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask);
1389 attrs &= ~(1 << OVS_KEY_ATTR_UDP);
1390 }
1391
1392 if (attrs & (1 << OVS_KEY_ATTR_SCTP)) {
1393 const struct ovs_key_sctp *sctp_key;
1394
1395 sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]);
1396 SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask);
1397 SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask);
1398 attrs &= ~(1 << OVS_KEY_ATTR_SCTP);
1399 }
1400
1401 if (attrs & (1 << OVS_KEY_ATTR_ICMP)) {
1402 const struct ovs_key_icmp *icmp_key;
1403
1404 icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]);
1405 SW_FLOW_KEY_PUT(match, tp.src,
1406 htons(icmp_key->icmp_type), is_mask);
1407 SW_FLOW_KEY_PUT(match, tp.dst,
1408 htons(icmp_key->icmp_code), is_mask);
1409 attrs &= ~(1 << OVS_KEY_ATTR_ICMP);
1410 }
1411
1412 if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) {
1413 const struct ovs_key_icmpv6 *icmpv6_key;
1414
1415 icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]);
1416 SW_FLOW_KEY_PUT(match, tp.src,
1417 htons(icmpv6_key->icmpv6_type), is_mask);
1418 SW_FLOW_KEY_PUT(match, tp.dst,
1419 htons(icmpv6_key->icmpv6_code), is_mask);
1420 attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6);
1421 }
1422
1423 if (attrs & (1 << OVS_KEY_ATTR_ND)) {
1424 const struct ovs_key_nd *nd_key;
1425
1426 nd_key = nla_data(a[OVS_KEY_ATTR_ND]);
1427 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target,
1428 nd_key->nd_target,
1429 sizeof(match->key->ipv6.nd.target),
1430 is_mask);
1431 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll,
1432 nd_key->nd_sll, ETH_ALEN, is_mask);
1433 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll,
1434 nd_key->nd_tll, ETH_ALEN, is_mask);
1435 attrs &= ~(1 << OVS_KEY_ATTR_ND);
1436 }
1437
1438 if (attrs != 0) {
1439 OVS_NLERR(log, "Unknown key attributes %llx",
1440 (unsigned long long)attrs);
1441 return -EINVAL;
1442 }
1443
1444 return 0;
1445 }
1446
1447 static void nlattr_set(struct nlattr *attr, u8 val,
1448 const struct ovs_len_tbl *tbl)
1449 {
1450 struct nlattr *nla;
1451 int rem;
1452
1453 /* The nlattr stream should already have been validated */
1454 nla_for_each_nested(nla, attr, rem) {
1455 if (tbl[nla_type(nla)].len == OVS_ATTR_NESTED) {
1456 if (tbl[nla_type(nla)].next)
1457 tbl = tbl[nla_type(nla)].next;
1458 nlattr_set(nla, val, tbl);
1459 } else {
1460 memset(nla_data(nla), val, nla_len(nla));
1461 }
1462
1463 if (nla_type(nla) == OVS_KEY_ATTR_CT_STATE)
1464 *(u32 *)nla_data(nla) &= CT_SUPPORTED_MASK;
1465 }
1466 }
1467
1468 static void mask_set_nlattr(struct nlattr *attr, u8 val)
1469 {
1470 nlattr_set(attr, val, ovs_key_lens);
1471 }
1472
1473 /**
1474 * ovs_nla_get_match - parses Netlink attributes into a flow key and
1475 * mask. In case the 'mask' is NULL, the flow is treated as exact match
1476 * flow. Otherwise, it is treated as a wildcarded flow, except the mask
1477 * does not include any don't care bit.
1478 * @net: Used to determine per-namespace field support.
1479 * @match: receives the extracted flow match information.
1480 * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
1481 * sequence. The fields should of the packet that triggered the creation
1482 * of this flow.
1483 * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink
1484 * attribute specifies the mask field of the wildcarded flow.
1485 * @log: Boolean to allow kernel error logging. Normally true, but when
1486 * probing for feature compatibility this should be passed in as false to
1487 * suppress unnecessary error logging.
1488 */
1489 int ovs_nla_get_match(struct net *net, struct sw_flow_match *match,
1490 const struct nlattr *nla_key,
1491 const struct nlattr *nla_mask,
1492 bool log)
1493 {
1494 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
1495 struct nlattr *newmask = NULL;
1496 u64 key_attrs = 0;
1497 u64 mask_attrs = 0;
1498 int err;
1499
1500 err = parse_flow_nlattrs(nla_key, a, &key_attrs, log);
1501 if (err)
1502 return err;
1503
1504 err = parse_vlan_from_nlattrs(match, &key_attrs, a, false, log);
1505 if (err)
1506 return err;
1507
1508 err = ovs_key_from_nlattrs(net, match, key_attrs, a, false, log);
1509 if (err)
1510 return err;
1511
1512 if (match->mask) {
1513 if (!nla_mask) {
1514 /* Create an exact match mask. We need to set to 0xff
1515 * all the 'match->mask' fields that have been touched
1516 * in 'match->key'. We cannot simply memset
1517 * 'match->mask', because padding bytes and fields not
1518 * specified in 'match->key' should be left to 0.
1519 * Instead, we use a stream of netlink attributes,
1520 * copied from 'key' and set to 0xff.
1521 * ovs_key_from_nlattrs() will take care of filling
1522 * 'match->mask' appropriately.
1523 */
1524 newmask = kmemdup(nla_key,
1525 nla_total_size(nla_len(nla_key)),
1526 GFP_KERNEL);
1527 if (!newmask)
1528 return -ENOMEM;
1529
1530 mask_set_nlattr(newmask, 0xff);
1531
1532 /* The userspace does not send tunnel attributes that
1533 * are 0, but we should not wildcard them nonetheless.
1534 */
1535 if (match->key->tun_proto)
1536 SW_FLOW_KEY_MEMSET_FIELD(match, tun_key,
1537 0xff, true);
1538
1539 nla_mask = newmask;
1540 }
1541
1542 err = parse_flow_mask_nlattrs(nla_mask, a, &mask_attrs, log);
1543 if (err)
1544 goto free_newmask;
1545
1546 /* Always match on tci. */
1547 SW_FLOW_KEY_PUT(match, eth.vlan.tci, htons(0xffff), true);
1548 SW_FLOW_KEY_PUT(match, eth.cvlan.tci, htons(0xffff), true);
1549
1550 err = parse_vlan_from_nlattrs(match, &mask_attrs, a, true, log);
1551 if (err)
1552 goto free_newmask;
1553
1554 err = ovs_key_from_nlattrs(net, match, mask_attrs, a, true,
1555 log);
1556 if (err)
1557 goto free_newmask;
1558 }
1559
1560 if (!match_validate(match, key_attrs, mask_attrs, log))
1561 err = -EINVAL;
1562
1563 free_newmask:
1564 kfree(newmask);
1565 return err;
1566 }
1567
1568 static size_t get_ufid_len(const struct nlattr *attr, bool log)
1569 {
1570 size_t len;
1571
1572 if (!attr)
1573 return 0;
1574
1575 len = nla_len(attr);
1576 if (len < 1 || len > MAX_UFID_LENGTH) {
1577 OVS_NLERR(log, "ufid size %u bytes exceeds the range (1, %d)",
1578 nla_len(attr), MAX_UFID_LENGTH);
1579 return 0;
1580 }
1581
1582 return len;
1583 }
1584
1585 /* Initializes 'flow->ufid', returning true if 'attr' contains a valid UFID,
1586 * or false otherwise.
1587 */
1588 bool ovs_nla_get_ufid(struct sw_flow_id *sfid, const struct nlattr *attr,
1589 bool log)
1590 {
1591 sfid->ufid_len = get_ufid_len(attr, log);
1592 if (sfid->ufid_len)
1593 memcpy(sfid->ufid, nla_data(attr), sfid->ufid_len);
1594
1595 return sfid->ufid_len;
1596 }
1597
1598 int ovs_nla_get_identifier(struct sw_flow_id *sfid, const struct nlattr *ufid,
1599 const struct sw_flow_key *key, bool log)
1600 {
1601 struct sw_flow_key *new_key;
1602
1603 if (ovs_nla_get_ufid(sfid, ufid, log))
1604 return 0;
1605
1606 /* If UFID was not provided, use unmasked key. */
1607 new_key = kmalloc(sizeof(*new_key), GFP_KERNEL);
1608 if (!new_key)
1609 return -ENOMEM;
1610 memcpy(new_key, key, sizeof(*key));
1611 sfid->unmasked_key = new_key;
1612
1613 return 0;
1614 }
1615
1616 u32 ovs_nla_get_ufid_flags(const struct nlattr *attr)
1617 {
1618 return attr ? nla_get_u32(attr) : 0;
1619 }
1620
1621 /**
1622 * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key.
1623 * @net: Network namespace.
1624 * @key: Receives extracted in_port, priority, tun_key, skb_mark and conntrack
1625 * metadata.
1626 * @a: Array of netlink attributes holding parsed %OVS_KEY_ATTR_* Netlink
1627 * attributes.
1628 * @attrs: Bit mask for the netlink attributes included in @a.
1629 * @log: Boolean to allow kernel error logging. Normally true, but when
1630 * probing for feature compatibility this should be passed in as false to
1631 * suppress unnecessary error logging.
1632 *
1633 * This parses a series of Netlink attributes that form a flow key, which must
1634 * take the same form accepted by flow_from_nlattrs(), but only enough of it to
1635 * get the metadata, that is, the parts of the flow key that cannot be
1636 * extracted from the packet itself.
1637 *
1638 * This must be called before the packet key fields are filled in 'key'.
1639 */
1640
1641 int ovs_nla_get_flow_metadata(struct net *net,
1642 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1],
1643 u64 attrs, struct sw_flow_key *key, bool log)
1644 {
1645 struct sw_flow_match match;
1646
1647 memset(&match, 0, sizeof(match));
1648 match.key = key;
1649
1650 key->ct_state = 0;
1651 key->ct_zone = 0;
1652 key->ct_orig_proto = 0;
1653 memset(&key->ct, 0, sizeof(key->ct));
1654 memset(&key->ipv4.ct_orig, 0, sizeof(key->ipv4.ct_orig));
1655 memset(&key->ipv6.ct_orig, 0, sizeof(key->ipv6.ct_orig));
1656
1657 key->phy.in_port = DP_MAX_PORTS;
1658
1659 return metadata_from_nlattrs(net, &match, &attrs, a, false, log);
1660 }
1661
1662 static int ovs_nla_put_vlan(struct sk_buff *skb, const struct vlan_head *vh,
1663 bool is_mask)
1664 {
1665 __be16 eth_type = !is_mask ? vh->tpid : htons(0xffff);
1666
1667 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) ||
1668 nla_put_be16(skb, OVS_KEY_ATTR_VLAN, vh->tci))
1669 return -EMSGSIZE;
1670 return 0;
1671 }
1672
1673 static int __ovs_nla_put_key(const struct sw_flow_key *swkey,
1674 const struct sw_flow_key *output, bool is_mask,
1675 struct sk_buff *skb)
1676 {
1677 struct ovs_key_ethernet *eth_key;
1678 struct nlattr *nla;
1679 struct nlattr *encap = NULL;
1680 struct nlattr *in_encap = NULL;
1681
1682 if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id))
1683 goto nla_put_failure;
1684
1685 if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash))
1686 goto nla_put_failure;
1687
1688 if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority))
1689 goto nla_put_failure;
1690
1691 if ((swkey->tun_proto || is_mask)) {
1692 const void *opts = NULL;
1693
1694 if (output->tun_key.tun_flags & TUNNEL_OPTIONS_PRESENT)
1695 opts = TUN_METADATA_OPTS(output, swkey->tun_opts_len);
1696
1697 if (ip_tun_to_nlattr(skb, &output->tun_key, opts,
1698 swkey->tun_opts_len, swkey->tun_proto))
1699 goto nla_put_failure;
1700 }
1701
1702 if (swkey->phy.in_port == DP_MAX_PORTS) {
1703 if (is_mask && (output->phy.in_port == 0xffff))
1704 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff))
1705 goto nla_put_failure;
1706 } else {
1707 u16 upper_u16;
1708 upper_u16 = !is_mask ? 0 : 0xffff;
1709
1710 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT,
1711 (upper_u16 << 16) | output->phy.in_port))
1712 goto nla_put_failure;
1713 }
1714
1715 if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark))
1716 goto nla_put_failure;
1717
1718 if (ovs_ct_put_key(swkey, output, skb))
1719 goto nla_put_failure;
1720
1721 if (ovs_key_mac_proto(swkey) == MAC_PROTO_ETHERNET) {
1722 nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key));
1723 if (!nla)
1724 goto nla_put_failure;
1725
1726 eth_key = nla_data(nla);
1727 ether_addr_copy(eth_key->eth_src, output->eth.src);
1728 ether_addr_copy(eth_key->eth_dst, output->eth.dst);
1729
1730 if (swkey->eth.vlan.tci || eth_type_vlan(swkey->eth.type)) {
1731 if (ovs_nla_put_vlan(skb, &output->eth.vlan, is_mask))
1732 goto nla_put_failure;
1733 encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
1734 if (!swkey->eth.vlan.tci)
1735 goto unencap;
1736
1737 if (swkey->eth.cvlan.tci || eth_type_vlan(swkey->eth.type)) {
1738 if (ovs_nla_put_vlan(skb, &output->eth.cvlan, is_mask))
1739 goto nla_put_failure;
1740 in_encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
1741 if (!swkey->eth.cvlan.tci)
1742 goto unencap;
1743 }
1744 }
1745
1746 if (swkey->eth.type == htons(ETH_P_802_2)) {
1747 /*
1748 * Ethertype 802.2 is represented in the netlink with omitted
1749 * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and
1750 * 0xffff in the mask attribute. Ethertype can also
1751 * be wildcarded.
1752 */
1753 if (is_mask && output->eth.type)
1754 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE,
1755 output->eth.type))
1756 goto nla_put_failure;
1757 goto unencap;
1758 }
1759 }
1760
1761 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type))
1762 goto nla_put_failure;
1763
1764 if (eth_type_vlan(swkey->eth.type)) {
1765 /* There are 3 VLAN tags, we don't know anything about the rest
1766 * of the packet, so truncate here.
1767 */
1768 WARN_ON_ONCE(!(encap && in_encap));
1769 goto unencap;
1770 }
1771
1772 if (swkey->eth.type == htons(ETH_P_IP)) {
1773 struct ovs_key_ipv4 *ipv4_key;
1774
1775 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key));
1776 if (!nla)
1777 goto nla_put_failure;
1778 ipv4_key = nla_data(nla);
1779 ipv4_key->ipv4_src = output->ipv4.addr.src;
1780 ipv4_key->ipv4_dst = output->ipv4.addr.dst;
1781 ipv4_key->ipv4_proto = output->ip.proto;
1782 ipv4_key->ipv4_tos = output->ip.tos;
1783 ipv4_key->ipv4_ttl = output->ip.ttl;
1784 ipv4_key->ipv4_frag = output->ip.frag;
1785 } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
1786 struct ovs_key_ipv6 *ipv6_key;
1787
1788 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key));
1789 if (!nla)
1790 goto nla_put_failure;
1791 ipv6_key = nla_data(nla);
1792 memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src,
1793 sizeof(ipv6_key->ipv6_src));
1794 memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst,
1795 sizeof(ipv6_key->ipv6_dst));
1796 ipv6_key->ipv6_label = output->ipv6.label;
1797 ipv6_key->ipv6_proto = output->ip.proto;
1798 ipv6_key->ipv6_tclass = output->ip.tos;
1799 ipv6_key->ipv6_hlimit = output->ip.ttl;
1800 ipv6_key->ipv6_frag = output->ip.frag;
1801 } else if (swkey->eth.type == htons(ETH_P_ARP) ||
1802 swkey->eth.type == htons(ETH_P_RARP)) {
1803 struct ovs_key_arp *arp_key;
1804
1805 nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key));
1806 if (!nla)
1807 goto nla_put_failure;
1808 arp_key = nla_data(nla);
1809 memset(arp_key, 0, sizeof(struct ovs_key_arp));
1810 arp_key->arp_sip = output->ipv4.addr.src;
1811 arp_key->arp_tip = output->ipv4.addr.dst;
1812 arp_key->arp_op = htons(output->ip.proto);
1813 ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha);
1814 ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha);
1815 } else if (eth_p_mpls(swkey->eth.type)) {
1816 struct ovs_key_mpls *mpls_key;
1817
1818 nla = nla_reserve(skb, OVS_KEY_ATTR_MPLS, sizeof(*mpls_key));
1819 if (!nla)
1820 goto nla_put_failure;
1821 mpls_key = nla_data(nla);
1822 mpls_key->mpls_lse = output->mpls.top_lse;
1823 }
1824
1825 if ((swkey->eth.type == htons(ETH_P_IP) ||
1826 swkey->eth.type == htons(ETH_P_IPV6)) &&
1827 swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
1828
1829 if (swkey->ip.proto == IPPROTO_TCP) {
1830 struct ovs_key_tcp *tcp_key;
1831
1832 nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key));
1833 if (!nla)
1834 goto nla_put_failure;
1835 tcp_key = nla_data(nla);
1836 tcp_key->tcp_src = output->tp.src;
1837 tcp_key->tcp_dst = output->tp.dst;
1838 if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS,
1839 output->tp.flags))
1840 goto nla_put_failure;
1841 } else if (swkey->ip.proto == IPPROTO_UDP) {
1842 struct ovs_key_udp *udp_key;
1843
1844 nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key));
1845 if (!nla)
1846 goto nla_put_failure;
1847 udp_key = nla_data(nla);
1848 udp_key->udp_src = output->tp.src;
1849 udp_key->udp_dst = output->tp.dst;
1850 } else if (swkey->ip.proto == IPPROTO_SCTP) {
1851 struct ovs_key_sctp *sctp_key;
1852
1853 nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key));
1854 if (!nla)
1855 goto nla_put_failure;
1856 sctp_key = nla_data(nla);
1857 sctp_key->sctp_src = output->tp.src;
1858 sctp_key->sctp_dst = output->tp.dst;
1859 } else if (swkey->eth.type == htons(ETH_P_IP) &&
1860 swkey->ip.proto == IPPROTO_ICMP) {
1861 struct ovs_key_icmp *icmp_key;
1862
1863 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key));
1864 if (!nla)
1865 goto nla_put_failure;
1866 icmp_key = nla_data(nla);
1867 icmp_key->icmp_type = ntohs(output->tp.src);
1868 icmp_key->icmp_code = ntohs(output->tp.dst);
1869 } else if (swkey->eth.type == htons(ETH_P_IPV6) &&
1870 swkey->ip.proto == IPPROTO_ICMPV6) {
1871 struct ovs_key_icmpv6 *icmpv6_key;
1872
1873 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6,
1874 sizeof(*icmpv6_key));
1875 if (!nla)
1876 goto nla_put_failure;
1877 icmpv6_key = nla_data(nla);
1878 icmpv6_key->icmpv6_type = ntohs(output->tp.src);
1879 icmpv6_key->icmpv6_code = ntohs(output->tp.dst);
1880
1881 if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION ||
1882 icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) {
1883 struct ovs_key_nd *nd_key;
1884
1885 nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key));
1886 if (!nla)
1887 goto nla_put_failure;
1888 nd_key = nla_data(nla);
1889 memcpy(nd_key->nd_target, &output->ipv6.nd.target,
1890 sizeof(nd_key->nd_target));
1891 ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll);
1892 ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll);
1893 }
1894 }
1895 }
1896
1897 unencap:
1898 if (in_encap)
1899 nla_nest_end(skb, in_encap);
1900 if (encap)
1901 nla_nest_end(skb, encap);
1902
1903 return 0;
1904
1905 nla_put_failure:
1906 return -EMSGSIZE;
1907 }
1908
1909 int ovs_nla_put_key(const struct sw_flow_key *swkey,
1910 const struct sw_flow_key *output, int attr, bool is_mask,
1911 struct sk_buff *skb)
1912 {
1913 int err;
1914 struct nlattr *nla;
1915
1916 nla = nla_nest_start(skb, attr);
1917 if (!nla)
1918 return -EMSGSIZE;
1919 err = __ovs_nla_put_key(swkey, output, is_mask, skb);
1920 if (err)
1921 return err;
1922 nla_nest_end(skb, nla);
1923
1924 return 0;
1925 }
1926
1927 /* Called with ovs_mutex or RCU read lock. */
1928 int ovs_nla_put_identifier(const struct sw_flow *flow, struct sk_buff *skb)
1929 {
1930 if (ovs_identifier_is_ufid(&flow->id))
1931 return nla_put(skb, OVS_FLOW_ATTR_UFID, flow->id.ufid_len,
1932 flow->id.ufid);
1933
1934 return ovs_nla_put_key(flow->id.unmasked_key, flow->id.unmasked_key,
1935 OVS_FLOW_ATTR_KEY, false, skb);
1936 }
1937
1938 /* Called with ovs_mutex or RCU read lock. */
1939 int ovs_nla_put_masked_key(const struct sw_flow *flow, struct sk_buff *skb)
1940 {
1941 return ovs_nla_put_key(&flow->key, &flow->key,
1942 OVS_FLOW_ATTR_KEY, false, skb);
1943 }
1944
1945 /* Called with ovs_mutex or RCU read lock. */
1946 int ovs_nla_put_mask(const struct sw_flow *flow, struct sk_buff *skb)
1947 {
1948 return ovs_nla_put_key(&flow->key, &flow->mask->key,
1949 OVS_FLOW_ATTR_MASK, true, skb);
1950 }
1951
1952 #define MAX_ACTIONS_BUFSIZE (32 * 1024)
1953
1954 static struct sw_flow_actions *nla_alloc_flow_actions(int size, bool log)
1955 {
1956 struct sw_flow_actions *sfa;
1957
1958 if (size > MAX_ACTIONS_BUFSIZE) {
1959 OVS_NLERR(log, "Flow action size %u bytes exceeds max", size);
1960 return ERR_PTR(-EINVAL);
1961 }
1962
1963 sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL);
1964 if (!sfa)
1965 return ERR_PTR(-ENOMEM);
1966
1967 sfa->actions_len = 0;
1968 return sfa;
1969 }
1970
1971 static void ovs_nla_free_set_action(const struct nlattr *a)
1972 {
1973 const struct nlattr *ovs_key = nla_data(a);
1974 struct ovs_tunnel_info *ovs_tun;
1975
1976 switch (nla_type(ovs_key)) {
1977 case OVS_KEY_ATTR_TUNNEL_INFO:
1978 ovs_tun = nla_data(ovs_key);
1979 dst_release((struct dst_entry *)ovs_tun->tun_dst);
1980 break;
1981 }
1982 }
1983
1984 void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts)
1985 {
1986 const struct nlattr *a;
1987 int rem;
1988
1989 if (!sf_acts)
1990 return;
1991
1992 nla_for_each_attr(a, sf_acts->actions, sf_acts->actions_len, rem) {
1993 switch (nla_type(a)) {
1994 case OVS_ACTION_ATTR_SET:
1995 ovs_nla_free_set_action(a);
1996 break;
1997 case OVS_ACTION_ATTR_CT:
1998 ovs_ct_free_action(a);
1999 break;
2000 }
2001 }
2002
2003 kfree(sf_acts);
2004 }
2005
2006 static void __ovs_nla_free_flow_actions(struct rcu_head *head)
2007 {
2008 ovs_nla_free_flow_actions(container_of(head, struct sw_flow_actions, rcu));
2009 }
2010
2011 /* Schedules 'sf_acts' to be freed after the next RCU grace period.
2012 * The caller must hold rcu_read_lock for this to be sensible. */
2013 void ovs_nla_free_flow_actions_rcu(struct sw_flow_actions *sf_acts)
2014 {
2015 call_rcu(&sf_acts->rcu, __ovs_nla_free_flow_actions);
2016 }
2017
2018 static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa,
2019 int attr_len, bool log)
2020 {
2021
2022 struct sw_flow_actions *acts;
2023 int new_acts_size;
2024 int req_size = NLA_ALIGN(attr_len);
2025 int next_offset = offsetof(struct sw_flow_actions, actions) +
2026 (*sfa)->actions_len;
2027
2028 if (req_size <= (ksize(*sfa) - next_offset))
2029 goto out;
2030
2031 new_acts_size = ksize(*sfa) * 2;
2032
2033 if (new_acts_size > MAX_ACTIONS_BUFSIZE) {
2034 if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size)
2035 return ERR_PTR(-EMSGSIZE);
2036 new_acts_size = MAX_ACTIONS_BUFSIZE;
2037 }
2038
2039 acts = nla_alloc_flow_actions(new_acts_size, log);
2040 if (IS_ERR(acts))
2041 return (void *)acts;
2042
2043 memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len);
2044 acts->actions_len = (*sfa)->actions_len;
2045 acts->orig_len = (*sfa)->orig_len;
2046 kfree(*sfa);
2047 *sfa = acts;
2048
2049 out:
2050 (*sfa)->actions_len += req_size;
2051 return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset);
2052 }
2053
2054 static struct nlattr *__add_action(struct sw_flow_actions **sfa,
2055 int attrtype, void *data, int len, bool log)
2056 {
2057 struct nlattr *a;
2058
2059 a = reserve_sfa_size(sfa, nla_attr_size(len), log);
2060 if (IS_ERR(a))
2061 return a;
2062
2063 a->nla_type = attrtype;
2064 a->nla_len = nla_attr_size(len);
2065
2066 if (data)
2067 memcpy(nla_data(a), data, len);
2068 memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len));
2069
2070 return a;
2071 }
2072
2073 int ovs_nla_add_action(struct sw_flow_actions **sfa, int attrtype, void *data,
2074 int len, bool log)
2075 {
2076 struct nlattr *a;
2077
2078 a = __add_action(sfa, attrtype, data, len, log);
2079
2080 return PTR_ERR_OR_ZERO(a);
2081 }
2082
2083 static inline int add_nested_action_start(struct sw_flow_actions **sfa,
2084 int attrtype, bool log)
2085 {
2086 int used = (*sfa)->actions_len;
2087 int err;
2088
2089 err = ovs_nla_add_action(sfa, attrtype, NULL, 0, log);
2090 if (err)
2091 return err;
2092
2093 return used;
2094 }
2095
2096 static inline void add_nested_action_end(struct sw_flow_actions *sfa,
2097 int st_offset)
2098 {
2099 struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions +
2100 st_offset);
2101
2102 a->nla_len = sfa->actions_len - st_offset;
2103 }
2104
2105 static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
2106 const struct sw_flow_key *key,
2107 struct sw_flow_actions **sfa,
2108 __be16 eth_type, __be16 vlan_tci, bool log);
2109
2110 static int validate_and_copy_sample(struct net *net, const struct nlattr *attr,
2111 const struct sw_flow_key *key,
2112 struct sw_flow_actions **sfa,
2113 __be16 eth_type, __be16 vlan_tci,
2114 bool log, bool last)
2115 {
2116 const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];
2117 const struct nlattr *probability, *actions;
2118 const struct nlattr *a;
2119 int rem, start, err;
2120 struct sample_arg arg;
2121
2122 memset(attrs, 0, sizeof(attrs));
2123 nla_for_each_nested(a, attr, rem) {
2124 int type = nla_type(a);
2125 if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type])
2126 return -EINVAL;
2127 attrs[type] = a;
2128 }
2129 if (rem)
2130 return -EINVAL;
2131
2132 probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY];
2133 if (!probability || nla_len(probability) != sizeof(u32))
2134 return -EINVAL;
2135
2136 actions = attrs[OVS_SAMPLE_ATTR_ACTIONS];
2137 if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN))
2138 return -EINVAL;
2139
2140 /* validation done, copy sample action. */
2141 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE, log);
2142 if (start < 0)
2143 return start;
2144
2145 /* When both skb and flow may be changed, put the sample
2146 * into a deferred fifo. On the other hand, if only skb
2147 * may be modified, the actions can be executed in place.
2148 *
2149 * Do this analysis at the flow installation time.
2150 * Set 'clone_action->exec' to true if the actions can be
2151 * executed without being deferred.
2152 *
2153 * If the sample is the last action, it can always be excuted
2154 * rather than deferred.
2155 */
2156 arg.exec = last || !actions_may_change_flow(actions);
2157 arg.probability = nla_get_u32(probability);
2158
2159 err = ovs_nla_add_action(sfa, OVS_SAMPLE_ATTR_ARG, &arg, sizeof(arg),
2160 log);
2161 if (err)
2162 return err;
2163
2164 err = __ovs_nla_copy_actions(net, actions, key, sfa,
2165 eth_type, vlan_tci, log);
2166
2167 if (err)
2168 return err;
2169
2170 add_nested_action_end(*sfa, start);
2171
2172 return 0;
2173 }
2174
2175 void ovs_match_init(struct sw_flow_match *match,
2176 struct sw_flow_key *key,
2177 bool reset_key,
2178 struct sw_flow_mask *mask)
2179 {
2180 memset(match, 0, sizeof(*match));
2181 match->key = key;
2182 match->mask = mask;
2183
2184 if (reset_key)
2185 memset(key, 0, sizeof(*key));
2186
2187 if (mask) {
2188 memset(&mask->key, 0, sizeof(mask->key));
2189 mask->range.start = mask->range.end = 0;
2190 }
2191 }
2192
2193 static int validate_geneve_opts(struct sw_flow_key *key)
2194 {
2195 struct geneve_opt *option;
2196 int opts_len = key->tun_opts_len;
2197 bool crit_opt = false;
2198
2199 option = (struct geneve_opt *)TUN_METADATA_OPTS(key, key->tun_opts_len);
2200 while (opts_len > 0) {
2201 int len;
2202
2203 if (opts_len < sizeof(*option))
2204 return -EINVAL;
2205
2206 len = sizeof(*option) + option->length * 4;
2207 if (len > opts_len)
2208 return -EINVAL;
2209
2210 crit_opt |= !!(option->type & GENEVE_CRIT_OPT_TYPE);
2211
2212 option = (struct geneve_opt *)((u8 *)option + len);
2213 opts_len -= len;
2214 };
2215
2216 key->tun_key.tun_flags |= crit_opt ? TUNNEL_CRIT_OPT : 0;
2217
2218 return 0;
2219 }
2220
2221 static int validate_and_copy_set_tun(const struct nlattr *attr,
2222 struct sw_flow_actions **sfa, bool log)
2223 {
2224 struct sw_flow_match match;
2225 struct sw_flow_key key;
2226 struct metadata_dst *tun_dst;
2227 struct ip_tunnel_info *tun_info;
2228 struct ovs_tunnel_info *ovs_tun;
2229 struct nlattr *a;
2230 int err = 0, start, opts_type;
2231
2232 ovs_match_init(&match, &key, true, NULL);
2233 opts_type = ip_tun_from_nlattr(nla_data(attr), &match, false, log);
2234 if (opts_type < 0)
2235 return opts_type;
2236
2237 if (key.tun_opts_len) {
2238 switch (opts_type) {
2239 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
2240 err = validate_geneve_opts(&key);
2241 if (err < 0)
2242 return err;
2243 break;
2244 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
2245 break;
2246 case OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS:
2247 break;
2248 }
2249 };
2250
2251 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET, log);
2252 if (start < 0)
2253 return start;
2254
2255 tun_dst = metadata_dst_alloc(key.tun_opts_len, METADATA_IP_TUNNEL,
2256 GFP_KERNEL);
2257
2258 if (!tun_dst)
2259 return -ENOMEM;
2260
2261 err = dst_cache_init(&tun_dst->u.tun_info.dst_cache, GFP_KERNEL);
2262 if (err) {
2263 dst_release((struct dst_entry *)tun_dst);
2264 return err;
2265 }
2266
2267 a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL,
2268 sizeof(*ovs_tun), log);
2269 if (IS_ERR(a)) {
2270 dst_release((struct dst_entry *)tun_dst);
2271 return PTR_ERR(a);
2272 }
2273
2274 ovs_tun = nla_data(a);
2275 ovs_tun->tun_dst = tun_dst;
2276
2277 tun_info = &tun_dst->u.tun_info;
2278 tun_info->mode = IP_TUNNEL_INFO_TX;
2279 if (key.tun_proto == AF_INET6)
2280 tun_info->mode |= IP_TUNNEL_INFO_IPV6;
2281 tun_info->key = key.tun_key;
2282
2283 /* We need to store the options in the action itself since
2284 * everything else will go away after flow setup. We can append
2285 * it to tun_info and then point there.
2286 */
2287 ip_tunnel_info_opts_set(tun_info,
2288 TUN_METADATA_OPTS(&key, key.tun_opts_len),
2289 key.tun_opts_len);
2290 add_nested_action_end(*sfa, start);
2291
2292 return err;
2293 }
2294
2295 /* Return false if there are any non-masked bits set.
2296 * Mask follows data immediately, before any netlink padding.
2297 */
2298 static bool validate_masked(u8 *data, int len)
2299 {
2300 u8 *mask = data + len;
2301
2302 while (len--)
2303 if (*data++ & ~*mask++)
2304 return false;
2305
2306 return true;
2307 }
2308
2309 static int validate_set(const struct nlattr *a,
2310 const struct sw_flow_key *flow_key,
2311 struct sw_flow_actions **sfa, bool *skip_copy,
2312 u8 mac_proto, __be16 eth_type, bool masked, bool log)
2313 {
2314 const struct nlattr *ovs_key = nla_data(a);
2315 int key_type = nla_type(ovs_key);
2316 size_t key_len;
2317
2318 /* There can be only one key in a action */
2319 if (nla_total_size(nla_len(ovs_key)) != nla_len(a))
2320 return -EINVAL;
2321
2322 key_len = nla_len(ovs_key);
2323 if (masked)
2324 key_len /= 2;
2325
2326 if (key_type > OVS_KEY_ATTR_MAX ||
2327 !check_attr_len(key_len, ovs_key_lens[key_type].len))
2328 return -EINVAL;
2329
2330 if (masked && !validate_masked(nla_data(ovs_key), key_len))
2331 return -EINVAL;
2332
2333 switch (key_type) {
2334 const struct ovs_key_ipv4 *ipv4_key;
2335 const struct ovs_key_ipv6 *ipv6_key;
2336 int err;
2337
2338 case OVS_KEY_ATTR_PRIORITY:
2339 case OVS_KEY_ATTR_SKB_MARK:
2340 case OVS_KEY_ATTR_CT_MARK:
2341 case OVS_KEY_ATTR_CT_LABELS:
2342 break;
2343
2344 case OVS_KEY_ATTR_ETHERNET:
2345 if (mac_proto != MAC_PROTO_ETHERNET)
2346 return -EINVAL;
2347 break;
2348
2349 case OVS_KEY_ATTR_TUNNEL:
2350 if (masked)
2351 return -EINVAL; /* Masked tunnel set not supported. */
2352
2353 *skip_copy = true;
2354 err = validate_and_copy_set_tun(a, sfa, log);
2355 if (err)
2356 return err;
2357 break;
2358
2359 case OVS_KEY_ATTR_IPV4:
2360 if (eth_type != htons(ETH_P_IP))
2361 return -EINVAL;
2362
2363 ipv4_key = nla_data(ovs_key);
2364
2365 if (masked) {
2366 const struct ovs_key_ipv4 *mask = ipv4_key + 1;
2367
2368 /* Non-writeable fields. */
2369 if (mask->ipv4_proto || mask->ipv4_frag)
2370 return -EINVAL;
2371 } else {
2372 if (ipv4_key->ipv4_proto != flow_key->ip.proto)
2373 return -EINVAL;
2374
2375 if (ipv4_key->ipv4_frag != flow_key->ip.frag)
2376 return -EINVAL;
2377 }
2378 break;
2379
2380 case OVS_KEY_ATTR_IPV6:
2381 if (eth_type != htons(ETH_P_IPV6))
2382 return -EINVAL;
2383
2384 ipv6_key = nla_data(ovs_key);
2385
2386 if (masked) {
2387 const struct ovs_key_ipv6 *mask = ipv6_key + 1;
2388
2389 /* Non-writeable fields. */
2390 if (mask->ipv6_proto || mask->ipv6_frag)
2391 return -EINVAL;
2392
2393 /* Invalid bits in the flow label mask? */
2394 if (ntohl(mask->ipv6_label) & 0xFFF00000)
2395 return -EINVAL;
2396 } else {
2397 if (ipv6_key->ipv6_proto != flow_key->ip.proto)
2398 return -EINVAL;
2399
2400 if (ipv6_key->ipv6_frag != flow_key->ip.frag)
2401 return -EINVAL;
2402 }
2403 if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000)
2404 return -EINVAL;
2405
2406 break;
2407
2408 case OVS_KEY_ATTR_TCP:
2409 if ((eth_type != htons(ETH_P_IP) &&
2410 eth_type != htons(ETH_P_IPV6)) ||
2411 flow_key->ip.proto != IPPROTO_TCP)
2412 return -EINVAL;
2413
2414 break;
2415
2416 case OVS_KEY_ATTR_UDP:
2417 if ((eth_type != htons(ETH_P_IP) &&
2418 eth_type != htons(ETH_P_IPV6)) ||
2419 flow_key->ip.proto != IPPROTO_UDP)
2420 return -EINVAL;
2421
2422 break;
2423
2424 case OVS_KEY_ATTR_MPLS:
2425 if (!eth_p_mpls(eth_type))
2426 return -EINVAL;
2427 break;
2428
2429 case OVS_KEY_ATTR_SCTP:
2430 if ((eth_type != htons(ETH_P_IP) &&
2431 eth_type != htons(ETH_P_IPV6)) ||
2432 flow_key->ip.proto != IPPROTO_SCTP)
2433 return -EINVAL;
2434
2435 break;
2436
2437 default:
2438 return -EINVAL;
2439 }
2440
2441 /* Convert non-masked non-tunnel set actions to masked set actions. */
2442 if (!masked && key_type != OVS_KEY_ATTR_TUNNEL) {
2443 int start, len = key_len * 2;
2444 struct nlattr *at;
2445
2446 *skip_copy = true;
2447
2448 start = add_nested_action_start(sfa,
2449 OVS_ACTION_ATTR_SET_TO_MASKED,
2450 log);
2451 if (start < 0)
2452 return start;
2453
2454 at = __add_action(sfa, key_type, NULL, len, log);
2455 if (IS_ERR(at))
2456 return PTR_ERR(at);
2457
2458 memcpy(nla_data(at), nla_data(ovs_key), key_len); /* Key. */
2459 memset(nla_data(at) + key_len, 0xff, key_len); /* Mask. */
2460 /* Clear non-writeable bits from otherwise writeable fields. */
2461 if (key_type == OVS_KEY_ATTR_IPV6) {
2462 struct ovs_key_ipv6 *mask = nla_data(at) + key_len;
2463
2464 mask->ipv6_label &= htonl(0x000FFFFF);
2465 }
2466 add_nested_action_end(*sfa, start);
2467 }
2468
2469 return 0;
2470 }
2471
2472 static int validate_userspace(const struct nlattr *attr)
2473 {
2474 static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = {
2475 [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 },
2476 [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC },
2477 [OVS_USERSPACE_ATTR_EGRESS_TUN_PORT] = {.type = NLA_U32 },
2478 };
2479 struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];
2480 int error;
2481
2482 error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX, attr,
2483 userspace_policy, NULL);
2484 if (error)
2485 return error;
2486
2487 if (!a[OVS_USERSPACE_ATTR_PID] ||
2488 !nla_get_u32(a[OVS_USERSPACE_ATTR_PID]))
2489 return -EINVAL;
2490
2491 return 0;
2492 }
2493
2494 static int copy_action(const struct nlattr *from,
2495 struct sw_flow_actions **sfa, bool log)
2496 {
2497 int totlen = NLA_ALIGN(from->nla_len);
2498 struct nlattr *to;
2499
2500 to = reserve_sfa_size(sfa, from->nla_len, log);
2501 if (IS_ERR(to))
2502 return PTR_ERR(to);
2503
2504 memcpy(to, from, totlen);
2505 return 0;
2506 }
2507
2508 static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
2509 const struct sw_flow_key *key,
2510 struct sw_flow_actions **sfa,
2511 __be16 eth_type, __be16 vlan_tci, bool log)
2512 {
2513 u8 mac_proto = ovs_key_mac_proto(key);
2514 const struct nlattr *a;
2515 int rem, err;
2516
2517 nla_for_each_nested(a, attr, rem) {
2518 /* Expected argument lengths, (u32)-1 for variable length. */
2519 static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {
2520 [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32),
2521 [OVS_ACTION_ATTR_RECIRC] = sizeof(u32),
2522 [OVS_ACTION_ATTR_USERSPACE] = (u32)-1,
2523 [OVS_ACTION_ATTR_PUSH_MPLS] = sizeof(struct ovs_action_push_mpls),
2524 [OVS_ACTION_ATTR_POP_MPLS] = sizeof(__be16),
2525 [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan),
2526 [OVS_ACTION_ATTR_POP_VLAN] = 0,
2527 [OVS_ACTION_ATTR_SET] = (u32)-1,
2528 [OVS_ACTION_ATTR_SET_MASKED] = (u32)-1,
2529 [OVS_ACTION_ATTR_SAMPLE] = (u32)-1,
2530 [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash),
2531 [OVS_ACTION_ATTR_CT] = (u32)-1,
2532 [OVS_ACTION_ATTR_CT_CLEAR] = 0,
2533 [OVS_ACTION_ATTR_TRUNC] = sizeof(struct ovs_action_trunc),
2534 [OVS_ACTION_ATTR_PUSH_ETH] = sizeof(struct ovs_action_push_eth),
2535 [OVS_ACTION_ATTR_POP_ETH] = 0,
2536 };
2537 const struct ovs_action_push_vlan *vlan;
2538 int type = nla_type(a);
2539 bool skip_copy;
2540
2541 if (type > OVS_ACTION_ATTR_MAX ||
2542 (action_lens[type] != nla_len(a) &&
2543 action_lens[type] != (u32)-1))
2544 return -EINVAL;
2545
2546 skip_copy = false;
2547 switch (type) {
2548 case OVS_ACTION_ATTR_UNSPEC:
2549 return -EINVAL;
2550
2551 case OVS_ACTION_ATTR_USERSPACE:
2552 err = validate_userspace(a);
2553 if (err)
2554 return err;
2555 break;
2556
2557 case OVS_ACTION_ATTR_OUTPUT:
2558 if (nla_get_u32(a) >= DP_MAX_PORTS)
2559 return -EINVAL;
2560 break;
2561
2562 case OVS_ACTION_ATTR_TRUNC: {
2563 const struct ovs_action_trunc *trunc = nla_data(a);
2564
2565 if (trunc->max_len < ETH_HLEN)
2566 return -EINVAL;
2567 break;
2568 }
2569
2570 case OVS_ACTION_ATTR_HASH: {
2571 const struct ovs_action_hash *act_hash = nla_data(a);
2572
2573 switch (act_hash->hash_alg) {
2574 case OVS_HASH_ALG_L4:
2575 break;
2576 default:
2577 return -EINVAL;
2578 }
2579
2580 break;
2581 }
2582
2583 case OVS_ACTION_ATTR_POP_VLAN:
2584 if (mac_proto != MAC_PROTO_ETHERNET)
2585 return -EINVAL;
2586 vlan_tci = htons(0);
2587 break;
2588
2589 case OVS_ACTION_ATTR_PUSH_VLAN:
2590 if (mac_proto != MAC_PROTO_ETHERNET)
2591 return -EINVAL;
2592 vlan = nla_data(a);
2593 if (!eth_type_vlan(vlan->vlan_tpid))
2594 return -EINVAL;
2595 if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT)))
2596 return -EINVAL;
2597 vlan_tci = vlan->vlan_tci;
2598 break;
2599
2600 case OVS_ACTION_ATTR_RECIRC:
2601 break;
2602
2603 case OVS_ACTION_ATTR_PUSH_MPLS: {
2604 const struct ovs_action_push_mpls *mpls = nla_data(a);
2605
2606 if (!eth_p_mpls(mpls->mpls_ethertype))
2607 return -EINVAL;
2608 /* Prohibit push MPLS other than to a white list
2609 * for packets that have a known tag order.
2610 */
2611 if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
2612 (eth_type != htons(ETH_P_IP) &&
2613 eth_type != htons(ETH_P_IPV6) &&
2614 eth_type != htons(ETH_P_ARP) &&
2615 eth_type != htons(ETH_P_RARP) &&
2616 !eth_p_mpls(eth_type)))
2617 return -EINVAL;
2618 eth_type = mpls->mpls_ethertype;
2619 break;
2620 }
2621
2622 case OVS_ACTION_ATTR_POP_MPLS:
2623 if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
2624 !eth_p_mpls(eth_type))
2625 return -EINVAL;
2626
2627 /* Disallow subsequent L2.5+ set and mpls_pop actions
2628 * as there is no check here to ensure that the new
2629 * eth_type is valid and thus set actions could
2630 * write off the end of the packet or otherwise
2631 * corrupt it.
2632 *
2633 * Support for these actions is planned using packet
2634 * recirculation.
2635 */
2636 eth_type = htons(0);
2637 break;
2638
2639 case OVS_ACTION_ATTR_SET:
2640 err = validate_set(a, key, sfa,
2641 &skip_copy, mac_proto, eth_type,
2642 false, log);
2643 if (err)
2644 return err;
2645 break;
2646
2647 case OVS_ACTION_ATTR_SET_MASKED:
2648 err = validate_set(a, key, sfa,
2649 &skip_copy, mac_proto, eth_type,
2650 true, log);
2651 if (err)
2652 return err;
2653 break;
2654
2655 case OVS_ACTION_ATTR_SAMPLE: {
2656 bool last = nla_is_last(a, rem);
2657
2658 err = validate_and_copy_sample(net, a, key, sfa,
2659 eth_type, vlan_tci,
2660 log, last);
2661 if (err)
2662 return err;
2663 skip_copy = true;
2664 break;
2665 }
2666
2667 case OVS_ACTION_ATTR_CT:
2668 err = ovs_ct_copy_action(net, a, key, sfa, log);
2669 if (err)
2670 return err;
2671 skip_copy = true;
2672 break;
2673
2674 case OVS_ACTION_ATTR_CT_CLEAR:
2675 break;
2676
2677 case OVS_ACTION_ATTR_PUSH_ETH:
2678 /* Disallow pushing an Ethernet header if one
2679 * is already present */
2680 if (mac_proto != MAC_PROTO_NONE)
2681 return -EINVAL;
2682 mac_proto = MAC_PROTO_NONE;
2683 break;
2684
2685 case OVS_ACTION_ATTR_POP_ETH:
2686 if (mac_proto != MAC_PROTO_ETHERNET)
2687 return -EINVAL;
2688 if (vlan_tci & htons(VLAN_TAG_PRESENT))
2689 return -EINVAL;
2690 mac_proto = MAC_PROTO_ETHERNET;
2691 break;
2692
2693 default:
2694 OVS_NLERR(log, "Unknown Action type %d", type);
2695 return -EINVAL;
2696 }
2697 if (!skip_copy) {
2698 err = copy_action(a, sfa, log);
2699 if (err)
2700 return err;
2701 }
2702 }
2703
2704 if (rem > 0)
2705 return -EINVAL;
2706
2707 return 0;
2708 }
2709
2710 /* 'key' must be the masked key. */
2711 int ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
2712 const struct sw_flow_key *key,
2713 struct sw_flow_actions **sfa, bool log)
2714 {
2715 int err;
2716
2717 *sfa = nla_alloc_flow_actions(nla_len(attr), log);
2718 if (IS_ERR(*sfa))
2719 return PTR_ERR(*sfa);
2720
2721 (*sfa)->orig_len = nla_len(attr);
2722 err = __ovs_nla_copy_actions(net, attr, key, sfa, key->eth.type,
2723 key->eth.vlan.tci, log);
2724 if (err)
2725 ovs_nla_free_flow_actions(*sfa);
2726
2727 return err;
2728 }
2729
2730 static int sample_action_to_attr(const struct nlattr *attr,
2731 struct sk_buff *skb)
2732 {
2733 struct nlattr *start, *ac_start = NULL, *sample_arg;
2734 int err = 0, rem = nla_len(attr);
2735 const struct sample_arg *arg;
2736 struct nlattr *actions;
2737
2738 start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE);
2739 if (!start)
2740 return -EMSGSIZE;
2741
2742 sample_arg = nla_data(attr);
2743 arg = nla_data(sample_arg);
2744 actions = nla_next(sample_arg, &rem);
2745
2746 if (nla_put_u32(skb, OVS_SAMPLE_ATTR_PROBABILITY, arg->probability)) {
2747 err = -EMSGSIZE;
2748 goto out;
2749 }
2750
2751 ac_start = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS);
2752 if (!ac_start) {
2753 err = -EMSGSIZE;
2754 goto out;
2755 }
2756
2757 err = ovs_nla_put_actions(actions, rem, skb);
2758
2759 out:
2760 if (err) {
2761 nla_nest_cancel(skb, ac_start);
2762 nla_nest_cancel(skb, start);
2763 } else {
2764 nla_nest_end(skb, ac_start);
2765 nla_nest_end(skb, start);
2766 }
2767
2768 return err;
2769 }
2770
2771 static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb)
2772 {
2773 const struct nlattr *ovs_key = nla_data(a);
2774 int key_type = nla_type(ovs_key);
2775 struct nlattr *start;
2776 int err;
2777
2778 switch (key_type) {
2779 case OVS_KEY_ATTR_TUNNEL_INFO: {
2780 struct ovs_tunnel_info *ovs_tun = nla_data(ovs_key);
2781 struct ip_tunnel_info *tun_info = &ovs_tun->tun_dst->u.tun_info;
2782
2783 start = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
2784 if (!start)
2785 return -EMSGSIZE;
2786
2787 err = ip_tun_to_nlattr(skb, &tun_info->key,
2788 ip_tunnel_info_opts(tun_info),
2789 tun_info->options_len,
2790 ip_tunnel_info_af(tun_info));
2791 if (err)
2792 return err;
2793 nla_nest_end(skb, start);
2794 break;
2795 }
2796 default:
2797 if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key))
2798 return -EMSGSIZE;
2799 break;
2800 }
2801
2802 return 0;
2803 }
2804
2805 static int masked_set_action_to_set_action_attr(const struct nlattr *a,
2806 struct sk_buff *skb)
2807 {
2808 const struct nlattr *ovs_key = nla_data(a);
2809 struct nlattr *nla;
2810 size_t key_len = nla_len(ovs_key) / 2;
2811
2812 /* Revert the conversion we did from a non-masked set action to
2813 * masked set action.
2814 */
2815 nla = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
2816 if (!nla)
2817 return -EMSGSIZE;
2818
2819 if (nla_put(skb, nla_type(ovs_key), key_len, nla_data(ovs_key)))
2820 return -EMSGSIZE;
2821
2822 nla_nest_end(skb, nla);
2823 return 0;
2824 }
2825
2826 int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb)
2827 {
2828 const struct nlattr *a;
2829 int rem, err;
2830
2831 nla_for_each_attr(a, attr, len, rem) {
2832 int type = nla_type(a);
2833
2834 switch (type) {
2835 case OVS_ACTION_ATTR_SET:
2836 err = set_action_to_attr(a, skb);
2837 if (err)
2838 return err;
2839 break;
2840
2841 case OVS_ACTION_ATTR_SET_TO_MASKED:
2842 err = masked_set_action_to_set_action_attr(a, skb);
2843 if (err)
2844 return err;
2845 break;
2846
2847 case OVS_ACTION_ATTR_SAMPLE:
2848 err = sample_action_to_attr(a, skb);
2849 if (err)
2850 return err;
2851 break;
2852
2853 case OVS_ACTION_ATTR_CT:
2854 err = ovs_ct_action_to_attr(nla_data(a), skb);
2855 if (err)
2856 return err;
2857 break;
2858
2859 default:
2860 if (nla_put(skb, type, nla_len(a), nla_data(a)))
2861 return -EMSGSIZE;
2862 break;
2863 }
2864 }
2865
2866 return 0;
2867 }
ubuntu-bionic-kernel mirror