1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2007-2017 Nicira, Inc.
6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10 #include <linux/uaccess.h>
11 #include <linux/netdevice.h>
12 #include <linux/etherdevice.h>
13 #include <linux/if_ether.h>
14 #include <linux/if_vlan.h>
15 #include <net/llc_pdu.h>
16 #include <linux/kernel.h>
17 #include <linux/jhash.h>
18 #include <linux/jiffies.h>
19 #include <linux/llc.h>
20 #include <linux/module.h>
22 #include <linux/rcupdate.h>
23 #include <linux/if_arp.h>
25 #include <linux/ipv6.h>
26 #include <linux/sctp.h>
27 #include <linux/tcp.h>
28 #include <linux/udp.h>
29 #include <linux/icmp.h>
30 #include <linux/icmpv6.h>
31 #include <linux/rculist.h>
32 #include <net/geneve.h>
35 #include <net/ndisc.h>
37 #include <net/vxlan.h>
38 #include <net/tun_proto.h>
39 #include <net/erspan.h>
41 #include "flow_netlink.h"
45 const struct ovs_len_tbl *next;
48 #define OVS_ATTR_NESTED -1
49 #define OVS_ATTR_VARIABLE -2
51 static bool actions_may_change_flow(const struct nlattr *actions)
56 nla_for_each_nested(nla, actions, rem) {
57 u16 action = nla_type(nla);
60 case OVS_ACTION_ATTR_OUTPUT:
61 case OVS_ACTION_ATTR_RECIRC:
62 case OVS_ACTION_ATTR_TRUNC:
63 case OVS_ACTION_ATTR_USERSPACE:
66 case OVS_ACTION_ATTR_CT:
67 case OVS_ACTION_ATTR_CT_CLEAR:
68 case OVS_ACTION_ATTR_HASH:
69 case OVS_ACTION_ATTR_POP_ETH:
70 case OVS_ACTION_ATTR_POP_MPLS:
71 case OVS_ACTION_ATTR_POP_NSH:
72 case OVS_ACTION_ATTR_POP_VLAN:
73 case OVS_ACTION_ATTR_PUSH_ETH:
74 case OVS_ACTION_ATTR_PUSH_MPLS:
75 case OVS_ACTION_ATTR_PUSH_NSH:
76 case OVS_ACTION_ATTR_PUSH_VLAN:
77 case OVS_ACTION_ATTR_SAMPLE:
78 case OVS_ACTION_ATTR_SET:
79 case OVS_ACTION_ATTR_SET_MASKED:
80 case OVS_ACTION_ATTR_METER:
81 case OVS_ACTION_ATTR_CHECK_PKT_LEN:
89 static void update_range(struct sw_flow_match *match,
90 size_t offset, size_t size, bool is_mask)
92 struct sw_flow_key_range *range;
93 size_t start = rounddown(offset, sizeof(long));
94 size_t end = roundup(offset + size, sizeof(long));
97 range = &match->range;
99 range = &match->mask->range;
101 if (range->start == range->end) {
102 range->start = start;
107 if (range->start > start)
108 range->start = start;
110 if (range->end < end)
114 #define SW_FLOW_KEY_PUT(match, field, value, is_mask) \
116 update_range(match, offsetof(struct sw_flow_key, field), \
117 sizeof((match)->key->field), is_mask); \
119 (match)->mask->key.field = value; \
121 (match)->key->field = value; \
124 #define SW_FLOW_KEY_MEMCPY_OFFSET(match, offset, value_p, len, is_mask) \
126 update_range(match, offset, len, is_mask); \
128 memcpy((u8 *)&(match)->mask->key + offset, value_p, \
131 memcpy((u8 *)(match)->key + offset, value_p, len); \
134 #define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \
135 SW_FLOW_KEY_MEMCPY_OFFSET(match, offsetof(struct sw_flow_key, field), \
136 value_p, len, is_mask)
138 #define SW_FLOW_KEY_MEMSET_FIELD(match, field, value, is_mask) \
140 update_range(match, offsetof(struct sw_flow_key, field), \
141 sizeof((match)->key->field), is_mask); \
143 memset((u8 *)&(match)->mask->key.field, value, \
144 sizeof((match)->mask->key.field)); \
146 memset((u8 *)&(match)->key->field, value, \
147 sizeof((match)->key->field)); \
150 static bool match_validate(const struct sw_flow_match *match,
151 u64 key_attrs, u64 mask_attrs, bool log)
153 u64 key_expected = 0;
154 u64 mask_allowed = key_attrs; /* At most allow all key attributes */
156 /* The following mask attributes allowed only if they
157 * pass the validation tests. */
158 mask_allowed &= ~((1 << OVS_KEY_ATTR_IPV4)
159 | (1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4)
160 | (1 << OVS_KEY_ATTR_IPV6)
161 | (1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6)
162 | (1 << OVS_KEY_ATTR_TCP)
163 | (1 << OVS_KEY_ATTR_TCP_FLAGS)
164 | (1 << OVS_KEY_ATTR_UDP)
165 | (1 << OVS_KEY_ATTR_SCTP)
166 | (1 << OVS_KEY_ATTR_ICMP)
167 | (1 << OVS_KEY_ATTR_ICMPV6)
168 | (1 << OVS_KEY_ATTR_ARP)
169 | (1 << OVS_KEY_ATTR_ND)
170 | (1 << OVS_KEY_ATTR_MPLS)
171 | (1 << OVS_KEY_ATTR_NSH));
173 /* Always allowed mask fields. */
174 mask_allowed |= ((1 << OVS_KEY_ATTR_TUNNEL)
175 | (1 << OVS_KEY_ATTR_IN_PORT)
176 | (1 << OVS_KEY_ATTR_ETHERTYPE));
178 /* Check key attributes. */
179 if (match->key->eth.type == htons(ETH_P_ARP)
180 || match->key->eth.type == htons(ETH_P_RARP)) {
181 key_expected |= 1 << OVS_KEY_ATTR_ARP;
182 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
183 mask_allowed |= 1 << OVS_KEY_ATTR_ARP;
186 if (eth_p_mpls(match->key->eth.type)) {
187 key_expected |= 1 << OVS_KEY_ATTR_MPLS;
188 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
189 mask_allowed |= 1 << OVS_KEY_ATTR_MPLS;
192 if (match->key->eth.type == htons(ETH_P_IP)) {
193 key_expected |= 1 << OVS_KEY_ATTR_IPV4;
194 if (match->mask && match->mask->key.eth.type == htons(0xffff)) {
195 mask_allowed |= 1 << OVS_KEY_ATTR_IPV4;
196 mask_allowed |= 1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4;
199 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
200 if (match->key->ip.proto == IPPROTO_UDP) {
201 key_expected |= 1 << OVS_KEY_ATTR_UDP;
202 if (match->mask && (match->mask->key.ip.proto == 0xff))
203 mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
206 if (match->key->ip.proto == IPPROTO_SCTP) {
207 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
208 if (match->mask && (match->mask->key.ip.proto == 0xff))
209 mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
212 if (match->key->ip.proto == IPPROTO_TCP) {
213 key_expected |= 1 << OVS_KEY_ATTR_TCP;
214 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
215 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
216 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
217 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
221 if (match->key->ip.proto == IPPROTO_ICMP) {
222 key_expected |= 1 << OVS_KEY_ATTR_ICMP;
223 if (match->mask && (match->mask->key.ip.proto == 0xff))
224 mask_allowed |= 1 << OVS_KEY_ATTR_ICMP;
229 if (match->key->eth.type == htons(ETH_P_IPV6)) {
230 key_expected |= 1 << OVS_KEY_ATTR_IPV6;
231 if (match->mask && match->mask->key.eth.type == htons(0xffff)) {
232 mask_allowed |= 1 << OVS_KEY_ATTR_IPV6;
233 mask_allowed |= 1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6;
236 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
237 if (match->key->ip.proto == IPPROTO_UDP) {
238 key_expected |= 1 << OVS_KEY_ATTR_UDP;
239 if (match->mask && (match->mask->key.ip.proto == 0xff))
240 mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
243 if (match->key->ip.proto == IPPROTO_SCTP) {
244 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
245 if (match->mask && (match->mask->key.ip.proto == 0xff))
246 mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
249 if (match->key->ip.proto == IPPROTO_TCP) {
250 key_expected |= 1 << OVS_KEY_ATTR_TCP;
251 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
252 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
253 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
254 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
258 if (match->key->ip.proto == IPPROTO_ICMPV6) {
259 key_expected |= 1 << OVS_KEY_ATTR_ICMPV6;
260 if (match->mask && (match->mask->key.ip.proto == 0xff))
261 mask_allowed |= 1 << OVS_KEY_ATTR_ICMPV6;
263 if (match->key->tp.src ==
264 htons(NDISC_NEIGHBOUR_SOLICITATION) ||
265 match->key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) {
266 key_expected |= 1 << OVS_KEY_ATTR_ND;
267 /* Original direction conntrack tuple
268 * uses the same space as the ND fields
269 * in the key, so both are not allowed
272 mask_allowed &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6);
273 if (match->mask && (match->mask->key.tp.src == htons(0xff)))
274 mask_allowed |= 1 << OVS_KEY_ATTR_ND;
280 if (match->key->eth.type == htons(ETH_P_NSH)) {
281 key_expected |= 1 << OVS_KEY_ATTR_NSH;
283 match->mask->key.eth.type == htons(0xffff)) {
284 mask_allowed |= 1 << OVS_KEY_ATTR_NSH;
288 if ((key_attrs & key_expected) != key_expected) {
289 /* Key attributes check failed. */
290 OVS_NLERR(log, "Missing key (keys=%llx, expected=%llx)",
291 (unsigned long long)key_attrs,
292 (unsigned long long)key_expected);
296 if ((mask_attrs & mask_allowed) != mask_attrs) {
297 /* Mask attributes check failed. */
298 OVS_NLERR(log, "Unexpected mask (mask=%llx, allowed=%llx)",
299 (unsigned long long)mask_attrs,
300 (unsigned long long)mask_allowed);
307 size_t ovs_tun_key_attr_size(void)
309 /* Whenever adding new OVS_TUNNEL_KEY_ FIELDS, we should consider
310 * updating this function.
312 return nla_total_size_64bit(8) /* OVS_TUNNEL_KEY_ATTR_ID */
313 + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_SRC */
314 + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_DST */
315 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */
316 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */
317 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */
318 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */
319 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_OAM */
320 + nla_total_size(256) /* OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS */
321 /* OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS and
322 * OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS is mutually exclusive with
323 * OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS and covered by it.
325 + nla_total_size(2) /* OVS_TUNNEL_KEY_ATTR_TP_SRC */
326 + nla_total_size(2); /* OVS_TUNNEL_KEY_ATTR_TP_DST */
329 static size_t ovs_nsh_key_attr_size(void)
331 /* Whenever adding new OVS_NSH_KEY_ FIELDS, we should consider
332 * updating this function.
334 return nla_total_size(NSH_BASE_HDR_LEN) /* OVS_NSH_KEY_ATTR_BASE */
335 /* OVS_NSH_KEY_ATTR_MD1 and OVS_NSH_KEY_ATTR_MD2 are
336 * mutually exclusive, so the bigger one can cover
339 + nla_total_size(NSH_CTX_HDRS_MAX_LEN);
342 size_t ovs_key_attr_size(void)
344 /* Whenever adding new OVS_KEY_ FIELDS, we should consider
345 * updating this function.
347 BUILD_BUG_ON(OVS_KEY_ATTR_TUNNEL_INFO != 29);
349 return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */
350 + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */
351 + ovs_tun_key_attr_size()
352 + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */
353 + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */
354 + nla_total_size(4) /* OVS_KEY_ATTR_DP_HASH */
355 + nla_total_size(4) /* OVS_KEY_ATTR_RECIRC_ID */
356 + nla_total_size(4) /* OVS_KEY_ATTR_CT_STATE */
357 + nla_total_size(2) /* OVS_KEY_ATTR_CT_ZONE */
358 + nla_total_size(4) /* OVS_KEY_ATTR_CT_MARK */
359 + nla_total_size(16) /* OVS_KEY_ATTR_CT_LABELS */
360 + nla_total_size(40) /* OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6 */
361 + nla_total_size(0) /* OVS_KEY_ATTR_NSH */
362 + ovs_nsh_key_attr_size()
363 + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */
364 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
365 + nla_total_size(4) /* OVS_KEY_ATTR_VLAN */
366 + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */
367 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
368 + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */
369 + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */
370 + nla_total_size(28); /* OVS_KEY_ATTR_ND */
373 static const struct ovs_len_tbl ovs_vxlan_ext_key_lens[OVS_VXLAN_EXT_MAX + 1] = {
374 [OVS_VXLAN_EXT_GBP] = { .len = sizeof(u32) },
377 static const struct ovs_len_tbl ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = {
378 [OVS_TUNNEL_KEY_ATTR_ID] = { .len = sizeof(u64) },
379 [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = { .len = sizeof(u32) },
380 [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = { .len = sizeof(u32) },
381 [OVS_TUNNEL_KEY_ATTR_TOS] = { .len = 1 },
382 [OVS_TUNNEL_KEY_ATTR_TTL] = { .len = 1 },
383 [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = { .len = 0 },
384 [OVS_TUNNEL_KEY_ATTR_CSUM] = { .len = 0 },
385 [OVS_TUNNEL_KEY_ATTR_TP_SRC] = { .len = sizeof(u16) },
386 [OVS_TUNNEL_KEY_ATTR_TP_DST] = { .len = sizeof(u16) },
387 [OVS_TUNNEL_KEY_ATTR_OAM] = { .len = 0 },
388 [OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS] = { .len = OVS_ATTR_VARIABLE },
389 [OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS] = { .len = OVS_ATTR_NESTED,
390 .next = ovs_vxlan_ext_key_lens },
391 [OVS_TUNNEL_KEY_ATTR_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
392 [OVS_TUNNEL_KEY_ATTR_IPV6_DST] = { .len = sizeof(struct in6_addr) },
393 [OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS] = { .len = OVS_ATTR_VARIABLE },
394 [OVS_TUNNEL_KEY_ATTR_IPV4_INFO_BRIDGE] = { .len = 0 },
397 static const struct ovs_len_tbl
398 ovs_nsh_key_attr_lens[OVS_NSH_KEY_ATTR_MAX + 1] = {
399 [OVS_NSH_KEY_ATTR_BASE] = { .len = sizeof(struct ovs_nsh_key_base) },
400 [OVS_NSH_KEY_ATTR_MD1] = { .len = sizeof(struct ovs_nsh_key_md1) },
401 [OVS_NSH_KEY_ATTR_MD2] = { .len = OVS_ATTR_VARIABLE },
404 /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */
405 static const struct ovs_len_tbl ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = {
406 [OVS_KEY_ATTR_ENCAP] = { .len = OVS_ATTR_NESTED },
407 [OVS_KEY_ATTR_PRIORITY] = { .len = sizeof(u32) },
408 [OVS_KEY_ATTR_IN_PORT] = { .len = sizeof(u32) },
409 [OVS_KEY_ATTR_SKB_MARK] = { .len = sizeof(u32) },
410 [OVS_KEY_ATTR_ETHERNET] = { .len = sizeof(struct ovs_key_ethernet) },
411 [OVS_KEY_ATTR_VLAN] = { .len = sizeof(__be16) },
412 [OVS_KEY_ATTR_ETHERTYPE] = { .len = sizeof(__be16) },
413 [OVS_KEY_ATTR_IPV4] = { .len = sizeof(struct ovs_key_ipv4) },
414 [OVS_KEY_ATTR_IPV6] = { .len = sizeof(struct ovs_key_ipv6) },
415 [OVS_KEY_ATTR_TCP] = { .len = sizeof(struct ovs_key_tcp) },
416 [OVS_KEY_ATTR_TCP_FLAGS] = { .len = sizeof(__be16) },
417 [OVS_KEY_ATTR_UDP] = { .len = sizeof(struct ovs_key_udp) },
418 [OVS_KEY_ATTR_SCTP] = { .len = sizeof(struct ovs_key_sctp) },
419 [OVS_KEY_ATTR_ICMP] = { .len = sizeof(struct ovs_key_icmp) },
420 [OVS_KEY_ATTR_ICMPV6] = { .len = sizeof(struct ovs_key_icmpv6) },
421 [OVS_KEY_ATTR_ARP] = { .len = sizeof(struct ovs_key_arp) },
422 [OVS_KEY_ATTR_ND] = { .len = sizeof(struct ovs_key_nd) },
423 [OVS_KEY_ATTR_RECIRC_ID] = { .len = sizeof(u32) },
424 [OVS_KEY_ATTR_DP_HASH] = { .len = sizeof(u32) },
425 [OVS_KEY_ATTR_TUNNEL] = { .len = OVS_ATTR_NESTED,
426 .next = ovs_tunnel_key_lens, },
427 [OVS_KEY_ATTR_MPLS] = { .len = sizeof(struct ovs_key_mpls) },
428 [OVS_KEY_ATTR_CT_STATE] = { .len = sizeof(u32) },
429 [OVS_KEY_ATTR_CT_ZONE] = { .len = sizeof(u16) },
430 [OVS_KEY_ATTR_CT_MARK] = { .len = sizeof(u32) },
431 [OVS_KEY_ATTR_CT_LABELS] = { .len = sizeof(struct ovs_key_ct_labels) },
432 [OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4] = {
433 .len = sizeof(struct ovs_key_ct_tuple_ipv4) },
434 [OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6] = {
435 .len = sizeof(struct ovs_key_ct_tuple_ipv6) },
436 [OVS_KEY_ATTR_NSH] = { .len = OVS_ATTR_NESTED,
437 .next = ovs_nsh_key_attr_lens, },
440 static bool check_attr_len(unsigned int attr_len, unsigned int expected_len)
442 return expected_len == attr_len ||
443 expected_len == OVS_ATTR_NESTED ||
444 expected_len == OVS_ATTR_VARIABLE;
447 static bool is_all_zero(const u8 *fp, size_t size)
454 for (i = 0; i < size; i++)
461 static int __parse_flow_nlattrs(const struct nlattr *attr,
462 const struct nlattr *a[],
463 u64 *attrsp, bool log, bool nz)
465 const struct nlattr *nla;
470 nla_for_each_nested(nla, attr, rem) {
471 u16 type = nla_type(nla);
474 if (type > OVS_KEY_ATTR_MAX) {
475 OVS_NLERR(log, "Key type %d is out of range max %d",
476 type, OVS_KEY_ATTR_MAX);
480 if (attrs & (1 << type)) {
481 OVS_NLERR(log, "Duplicate key (type %d).", type);
485 expected_len = ovs_key_lens[type].len;
486 if (!check_attr_len(nla_len(nla), expected_len)) {
487 OVS_NLERR(log, "Key %d has unexpected len %d expected %d",
488 type, nla_len(nla), expected_len);
492 if (!nz || !is_all_zero(nla_data(nla), nla_len(nla))) {
498 OVS_NLERR(log, "Message has %d unknown bytes.", rem);
506 static int parse_flow_mask_nlattrs(const struct nlattr *attr,
507 const struct nlattr *a[], u64 *attrsp,
510 return __parse_flow_nlattrs(attr, a, attrsp, log, true);
513 int parse_flow_nlattrs(const struct nlattr *attr, const struct nlattr *a[],
514 u64 *attrsp, bool log)
516 return __parse_flow_nlattrs(attr, a, attrsp, log, false);
519 static int genev_tun_opt_from_nlattr(const struct nlattr *a,
520 struct sw_flow_match *match, bool is_mask,
523 unsigned long opt_key_offset;
525 if (nla_len(a) > sizeof(match->key->tun_opts)) {
526 OVS_NLERR(log, "Geneve option length err (len %d, max %zu).",
527 nla_len(a), sizeof(match->key->tun_opts));
531 if (nla_len(a) % 4 != 0) {
532 OVS_NLERR(log, "Geneve opt len %d is not a multiple of 4.",
537 /* We need to record the length of the options passed
538 * down, otherwise packets with the same format but
539 * additional options will be silently matched.
542 SW_FLOW_KEY_PUT(match, tun_opts_len, nla_len(a),
545 /* This is somewhat unusual because it looks at
546 * both the key and mask while parsing the
547 * attributes (and by extension assumes the key
548 * is parsed first). Normally, we would verify
549 * that each is the correct length and that the
550 * attributes line up in the validate function.
551 * However, that is difficult because this is
552 * variable length and we won't have the
555 if (match->key->tun_opts_len != nla_len(a)) {
556 OVS_NLERR(log, "Geneve option len %d != mask len %d",
557 match->key->tun_opts_len, nla_len(a));
561 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
564 opt_key_offset = TUN_METADATA_OFFSET(nla_len(a));
565 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, nla_data(a),
566 nla_len(a), is_mask);
570 static int vxlan_tun_opt_from_nlattr(const struct nlattr *attr,
571 struct sw_flow_match *match, bool is_mask,
576 unsigned long opt_key_offset;
577 struct vxlan_metadata opts;
579 BUILD_BUG_ON(sizeof(opts) > sizeof(match->key->tun_opts));
581 memset(&opts, 0, sizeof(opts));
582 nla_for_each_nested(a, attr, rem) {
583 int type = nla_type(a);
585 if (type > OVS_VXLAN_EXT_MAX) {
586 OVS_NLERR(log, "VXLAN extension %d out of range max %d",
587 type, OVS_VXLAN_EXT_MAX);
591 if (!check_attr_len(nla_len(a),
592 ovs_vxlan_ext_key_lens[type].len)) {
593 OVS_NLERR(log, "VXLAN extension %d has unexpected len %d expected %d",
595 ovs_vxlan_ext_key_lens[type].len);
600 case OVS_VXLAN_EXT_GBP:
601 opts.gbp = nla_get_u32(a);
604 OVS_NLERR(log, "Unknown VXLAN extension attribute %d",
610 OVS_NLERR(log, "VXLAN extension message has %d unknown bytes.",
616 SW_FLOW_KEY_PUT(match, tun_opts_len, sizeof(opts), false);
618 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
620 opt_key_offset = TUN_METADATA_OFFSET(sizeof(opts));
621 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, &opts, sizeof(opts),
626 static int erspan_tun_opt_from_nlattr(const struct nlattr *a,
627 struct sw_flow_match *match, bool is_mask,
630 unsigned long opt_key_offset;
632 BUILD_BUG_ON(sizeof(struct erspan_metadata) >
633 sizeof(match->key->tun_opts));
635 if (nla_len(a) > sizeof(match->key->tun_opts)) {
636 OVS_NLERR(log, "ERSPAN option length err (len %d, max %zu).",
637 nla_len(a), sizeof(match->key->tun_opts));
642 SW_FLOW_KEY_PUT(match, tun_opts_len,
643 sizeof(struct erspan_metadata), false);
645 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
647 opt_key_offset = TUN_METADATA_OFFSET(nla_len(a));
648 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, nla_data(a),
649 nla_len(a), is_mask);
653 static int ip_tun_from_nlattr(const struct nlattr *attr,
654 struct sw_flow_match *match, bool is_mask,
657 bool ttl = false, ipv4 = false, ipv6 = false;
658 bool info_bridge_mode = false;
659 __be16 tun_flags = 0;
664 nla_for_each_nested(a, attr, rem) {
665 int type = nla_type(a);
668 if (type > OVS_TUNNEL_KEY_ATTR_MAX) {
669 OVS_NLERR(log, "Tunnel attr %d out of range max %d",
670 type, OVS_TUNNEL_KEY_ATTR_MAX);
674 if (!check_attr_len(nla_len(a),
675 ovs_tunnel_key_lens[type].len)) {
676 OVS_NLERR(log, "Tunnel attr %d has unexpected len %d expected %d",
677 type, nla_len(a), ovs_tunnel_key_lens[type].len);
682 case OVS_TUNNEL_KEY_ATTR_ID:
683 SW_FLOW_KEY_PUT(match, tun_key.tun_id,
684 nla_get_be64(a), is_mask);
685 tun_flags |= TUNNEL_KEY;
687 case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
688 SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.src,
689 nla_get_in_addr(a), is_mask);
692 case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
693 SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.dst,
694 nla_get_in_addr(a), is_mask);
697 case OVS_TUNNEL_KEY_ATTR_IPV6_SRC:
698 SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.src,
699 nla_get_in6_addr(a), is_mask);
702 case OVS_TUNNEL_KEY_ATTR_IPV6_DST:
703 SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.dst,
704 nla_get_in6_addr(a), is_mask);
707 case OVS_TUNNEL_KEY_ATTR_TOS:
708 SW_FLOW_KEY_PUT(match, tun_key.tos,
709 nla_get_u8(a), is_mask);
711 case OVS_TUNNEL_KEY_ATTR_TTL:
712 SW_FLOW_KEY_PUT(match, tun_key.ttl,
713 nla_get_u8(a), is_mask);
716 case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
717 tun_flags |= TUNNEL_DONT_FRAGMENT;
719 case OVS_TUNNEL_KEY_ATTR_CSUM:
720 tun_flags |= TUNNEL_CSUM;
722 case OVS_TUNNEL_KEY_ATTR_TP_SRC:
723 SW_FLOW_KEY_PUT(match, tun_key.tp_src,
724 nla_get_be16(a), is_mask);
726 case OVS_TUNNEL_KEY_ATTR_TP_DST:
727 SW_FLOW_KEY_PUT(match, tun_key.tp_dst,
728 nla_get_be16(a), is_mask);
730 case OVS_TUNNEL_KEY_ATTR_OAM:
731 tun_flags |= TUNNEL_OAM;
733 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
735 OVS_NLERR(log, "Multiple metadata blocks provided");
739 err = genev_tun_opt_from_nlattr(a, match, is_mask, log);
743 tun_flags |= TUNNEL_GENEVE_OPT;
746 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
748 OVS_NLERR(log, "Multiple metadata blocks provided");
752 err = vxlan_tun_opt_from_nlattr(a, match, is_mask, log);
756 tun_flags |= TUNNEL_VXLAN_OPT;
759 case OVS_TUNNEL_KEY_ATTR_PAD:
761 case OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS:
763 OVS_NLERR(log, "Multiple metadata blocks provided");
767 err = erspan_tun_opt_from_nlattr(a, match, is_mask,
772 tun_flags |= TUNNEL_ERSPAN_OPT;
775 case OVS_TUNNEL_KEY_ATTR_IPV4_INFO_BRIDGE:
776 info_bridge_mode = true;
780 OVS_NLERR(log, "Unknown IP tunnel attribute %d",
786 SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask);
788 SW_FLOW_KEY_MEMSET_FIELD(match, tun_proto, 0xff, true);
790 SW_FLOW_KEY_PUT(match, tun_proto, ipv6 ? AF_INET6 : AF_INET,
794 OVS_NLERR(log, "IP tunnel attribute has %d unknown bytes.",
800 OVS_NLERR(log, "Mixed IPv4 and IPv6 tunnel attributes");
805 if (!ipv4 && !ipv6) {
806 OVS_NLERR(log, "IP tunnel dst address not specified");
810 if (info_bridge_mode) {
811 if (match->key->tun_key.u.ipv4.src ||
812 match->key->tun_key.u.ipv4.dst ||
813 match->key->tun_key.tp_src ||
814 match->key->tun_key.tp_dst ||
815 match->key->tun_key.ttl ||
816 match->key->tun_key.tos ||
817 tun_flags & ~TUNNEL_KEY) {
818 OVS_NLERR(log, "IPv4 tun info is not correct");
821 } else if (!match->key->tun_key.u.ipv4.dst) {
822 OVS_NLERR(log, "IPv4 tunnel dst address is zero");
826 if (ipv6 && ipv6_addr_any(&match->key->tun_key.u.ipv6.dst)) {
827 OVS_NLERR(log, "IPv6 tunnel dst address is zero");
831 if (!ttl && !info_bridge_mode) {
832 OVS_NLERR(log, "IP tunnel TTL not specified.");
840 static int vxlan_opt_to_nlattr(struct sk_buff *skb,
841 const void *tun_opts, int swkey_tun_opts_len)
843 const struct vxlan_metadata *opts = tun_opts;
846 nla = nla_nest_start_noflag(skb, OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS);
850 if (nla_put_u32(skb, OVS_VXLAN_EXT_GBP, opts->gbp) < 0)
853 nla_nest_end(skb, nla);
857 static int __ip_tun_to_nlattr(struct sk_buff *skb,
858 const struct ip_tunnel_key *output,
859 const void *tun_opts, int swkey_tun_opts_len,
860 unsigned short tun_proto, u8 mode)
862 if (output->tun_flags & TUNNEL_KEY &&
863 nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id,
864 OVS_TUNNEL_KEY_ATTR_PAD))
867 if (mode & IP_TUNNEL_INFO_BRIDGE)
868 return nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_IPV4_INFO_BRIDGE)
873 if (output->u.ipv4.src &&
874 nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC,
877 if (output->u.ipv4.dst &&
878 nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST,
883 if (!ipv6_addr_any(&output->u.ipv6.src) &&
884 nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_SRC,
885 &output->u.ipv6.src))
887 if (!ipv6_addr_any(&output->u.ipv6.dst) &&
888 nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_DST,
889 &output->u.ipv6.dst))
894 nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->tos))
896 if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ttl))
898 if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) &&
899 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT))
901 if ((output->tun_flags & TUNNEL_CSUM) &&
902 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM))
904 if (output->tp_src &&
905 nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_SRC, output->tp_src))
907 if (output->tp_dst &&
908 nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_DST, output->tp_dst))
910 if ((output->tun_flags & TUNNEL_OAM) &&
911 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM))
913 if (swkey_tun_opts_len) {
914 if (output->tun_flags & TUNNEL_GENEVE_OPT &&
915 nla_put(skb, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS,
916 swkey_tun_opts_len, tun_opts))
918 else if (output->tun_flags & TUNNEL_VXLAN_OPT &&
919 vxlan_opt_to_nlattr(skb, tun_opts, swkey_tun_opts_len))
921 else if (output->tun_flags & TUNNEL_ERSPAN_OPT &&
922 nla_put(skb, OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS,
923 swkey_tun_opts_len, tun_opts))
930 static int ip_tun_to_nlattr(struct sk_buff *skb,
931 const struct ip_tunnel_key *output,
932 const void *tun_opts, int swkey_tun_opts_len,
933 unsigned short tun_proto, u8 mode)
938 nla = nla_nest_start_noflag(skb, OVS_KEY_ATTR_TUNNEL);
942 err = __ip_tun_to_nlattr(skb, output, tun_opts, swkey_tun_opts_len,
947 nla_nest_end(skb, nla);
951 int ovs_nla_put_tunnel_info(struct sk_buff *skb,
952 struct ip_tunnel_info *tun_info)
954 return __ip_tun_to_nlattr(skb, &tun_info->key,
955 ip_tunnel_info_opts(tun_info),
956 tun_info->options_len,
957 ip_tunnel_info_af(tun_info), tun_info->mode);
960 static int encode_vlan_from_nlattrs(struct sw_flow_match *match,
961 const struct nlattr *a[],
962 bool is_mask, bool inner)
967 if (a[OVS_KEY_ATTR_VLAN])
968 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
970 if (a[OVS_KEY_ATTR_ETHERTYPE])
971 tpid = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
973 if (likely(!inner)) {
974 SW_FLOW_KEY_PUT(match, eth.vlan.tpid, tpid, is_mask);
975 SW_FLOW_KEY_PUT(match, eth.vlan.tci, tci, is_mask);
977 SW_FLOW_KEY_PUT(match, eth.cvlan.tpid, tpid, is_mask);
978 SW_FLOW_KEY_PUT(match, eth.cvlan.tci, tci, is_mask);
983 static int validate_vlan_from_nlattrs(const struct sw_flow_match *match,
984 u64 key_attrs, bool inner,
985 const struct nlattr **a, bool log)
989 if (!((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) &&
990 (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) &&
991 eth_type_vlan(nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE])))) {
996 if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) &&
997 (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) {
998 OVS_NLERR(log, "Invalid %s frame", (inner) ? "C-VLAN" : "VLAN");
1002 if (a[OVS_KEY_ATTR_VLAN])
1003 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
1005 if (!(tci & htons(VLAN_CFI_MASK))) {
1007 OVS_NLERR(log, "%s TCI does not have VLAN_CFI_MASK bit set.",
1008 (inner) ? "C-VLAN" : "VLAN");
1010 } else if (nla_len(a[OVS_KEY_ATTR_ENCAP])) {
1011 /* Corner case for truncated VLAN header. */
1012 OVS_NLERR(log, "Truncated %s header has non-zero encap attribute.",
1013 (inner) ? "C-VLAN" : "VLAN");
1021 static int validate_vlan_mask_from_nlattrs(const struct sw_flow_match *match,
1022 u64 key_attrs, bool inner,
1023 const struct nlattr **a, bool log)
1027 bool encap_valid = !!(match->key->eth.vlan.tci &
1028 htons(VLAN_CFI_MASK));
1029 bool i_encap_valid = !!(match->key->eth.cvlan.tci &
1030 htons(VLAN_CFI_MASK));
1032 if (!(key_attrs & (1 << OVS_KEY_ATTR_ENCAP))) {
1037 if ((!inner && !encap_valid) || (inner && !i_encap_valid)) {
1038 OVS_NLERR(log, "Encap mask attribute is set for non-%s frame.",
1039 (inner) ? "C-VLAN" : "VLAN");
1043 if (a[OVS_KEY_ATTR_VLAN])
1044 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
1046 if (a[OVS_KEY_ATTR_ETHERTYPE])
1047 tpid = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
1049 if (tpid != htons(0xffff)) {
1050 OVS_NLERR(log, "Must have an exact match on %s TPID (mask=%x).",
1051 (inner) ? "C-VLAN" : "VLAN", ntohs(tpid));
1054 if (!(tci & htons(VLAN_CFI_MASK))) {
1055 OVS_NLERR(log, "%s TCI mask does not have exact match for VLAN_CFI_MASK bit.",
1056 (inner) ? "C-VLAN" : "VLAN");
1063 static int __parse_vlan_from_nlattrs(struct sw_flow_match *match,
1064 u64 *key_attrs, bool inner,
1065 const struct nlattr **a, bool is_mask,
1069 const struct nlattr *encap;
1072 err = validate_vlan_from_nlattrs(match, *key_attrs, inner,
1075 err = validate_vlan_mask_from_nlattrs(match, *key_attrs, inner,
1080 err = encode_vlan_from_nlattrs(match, a, is_mask, inner);
1084 *key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP);
1085 *key_attrs &= ~(1 << OVS_KEY_ATTR_VLAN);
1086 *key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
1088 encap = a[OVS_KEY_ATTR_ENCAP];
1091 err = parse_flow_nlattrs(encap, a, key_attrs, log);
1093 err = parse_flow_mask_nlattrs(encap, a, key_attrs, log);
1098 static int parse_vlan_from_nlattrs(struct sw_flow_match *match,
1099 u64 *key_attrs, const struct nlattr **a,
1100 bool is_mask, bool log)
1103 bool encap_valid = false;
1105 err = __parse_vlan_from_nlattrs(match, key_attrs, false, a,
1110 encap_valid = !!(match->key->eth.vlan.tci & htons(VLAN_CFI_MASK));
1112 err = __parse_vlan_from_nlattrs(match, key_attrs, true, a,
1121 static int parse_eth_type_from_nlattrs(struct sw_flow_match *match,
1122 u64 *attrs, const struct nlattr **a,
1123 bool is_mask, bool log)
1127 eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
1129 /* Always exact match EtherType. */
1130 eth_type = htons(0xffff);
1131 } else if (!eth_proto_is_802_3(eth_type)) {
1132 OVS_NLERR(log, "EtherType %x is less than min %x",
1133 ntohs(eth_type), ETH_P_802_3_MIN);
1137 SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask);
1138 *attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
1142 static int metadata_from_nlattrs(struct net *net, struct sw_flow_match *match,
1143 u64 *attrs, const struct nlattr **a,
1144 bool is_mask, bool log)
1146 u8 mac_proto = MAC_PROTO_ETHERNET;
1148 if (*attrs & (1 << OVS_KEY_ATTR_DP_HASH)) {
1149 u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]);
1151 SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask);
1152 *attrs &= ~(1 << OVS_KEY_ATTR_DP_HASH);
1155 if (*attrs & (1 << OVS_KEY_ATTR_RECIRC_ID)) {
1156 u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]);
1158 SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask);
1159 *attrs &= ~(1 << OVS_KEY_ATTR_RECIRC_ID);
1162 if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) {
1163 SW_FLOW_KEY_PUT(match, phy.priority,
1164 nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask);
1165 *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY);
1168 if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) {
1169 u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]);
1172 in_port = 0xffffffff; /* Always exact match in_port. */
1173 } else if (in_port >= DP_MAX_PORTS) {
1174 OVS_NLERR(log, "Port %d exceeds max allowable %d",
1175 in_port, DP_MAX_PORTS);
1179 SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask);
1180 *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT);
1181 } else if (!is_mask) {
1182 SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask);
1185 if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) {
1186 uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]);
1188 SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask);
1189 *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK);
1191 if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) {
1192 if (ip_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match,
1195 *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL);
1198 if (*attrs & (1 << OVS_KEY_ATTR_CT_STATE) &&
1199 ovs_ct_verify(net, OVS_KEY_ATTR_CT_STATE)) {
1200 u32 ct_state = nla_get_u32(a[OVS_KEY_ATTR_CT_STATE]);
1202 if (ct_state & ~CT_SUPPORTED_MASK) {
1203 OVS_NLERR(log, "ct_state flags %08x unsupported",
1208 SW_FLOW_KEY_PUT(match, ct_state, ct_state, is_mask);
1209 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_STATE);
1211 if (*attrs & (1 << OVS_KEY_ATTR_CT_ZONE) &&
1212 ovs_ct_verify(net, OVS_KEY_ATTR_CT_ZONE)) {
1213 u16 ct_zone = nla_get_u16(a[OVS_KEY_ATTR_CT_ZONE]);
1215 SW_FLOW_KEY_PUT(match, ct_zone, ct_zone, is_mask);
1216 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ZONE);
1218 if (*attrs & (1 << OVS_KEY_ATTR_CT_MARK) &&
1219 ovs_ct_verify(net, OVS_KEY_ATTR_CT_MARK)) {
1220 u32 mark = nla_get_u32(a[OVS_KEY_ATTR_CT_MARK]);
1222 SW_FLOW_KEY_PUT(match, ct.mark, mark, is_mask);
1223 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_MARK);
1225 if (*attrs & (1 << OVS_KEY_ATTR_CT_LABELS) &&
1226 ovs_ct_verify(net, OVS_KEY_ATTR_CT_LABELS)) {
1227 const struct ovs_key_ct_labels *cl;
1229 cl = nla_data(a[OVS_KEY_ATTR_CT_LABELS]);
1230 SW_FLOW_KEY_MEMCPY(match, ct.labels, cl->ct_labels,
1231 sizeof(*cl), is_mask);
1232 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_LABELS);
1234 if (*attrs & (1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4)) {
1235 const struct ovs_key_ct_tuple_ipv4 *ct;
1237 ct = nla_data(a[OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4]);
1239 SW_FLOW_KEY_PUT(match, ipv4.ct_orig.src, ct->ipv4_src, is_mask);
1240 SW_FLOW_KEY_PUT(match, ipv4.ct_orig.dst, ct->ipv4_dst, is_mask);
1241 SW_FLOW_KEY_PUT(match, ct.orig_tp.src, ct->src_port, is_mask);
1242 SW_FLOW_KEY_PUT(match, ct.orig_tp.dst, ct->dst_port, is_mask);
1243 SW_FLOW_KEY_PUT(match, ct_orig_proto, ct->ipv4_proto, is_mask);
1244 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4);
1246 if (*attrs & (1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6)) {
1247 const struct ovs_key_ct_tuple_ipv6 *ct;
1249 ct = nla_data(a[OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6]);
1251 SW_FLOW_KEY_MEMCPY(match, ipv6.ct_orig.src, &ct->ipv6_src,
1252 sizeof(match->key->ipv6.ct_orig.src),
1254 SW_FLOW_KEY_MEMCPY(match, ipv6.ct_orig.dst, &ct->ipv6_dst,
1255 sizeof(match->key->ipv6.ct_orig.dst),
1257 SW_FLOW_KEY_PUT(match, ct.orig_tp.src, ct->src_port, is_mask);
1258 SW_FLOW_KEY_PUT(match, ct.orig_tp.dst, ct->dst_port, is_mask);
1259 SW_FLOW_KEY_PUT(match, ct_orig_proto, ct->ipv6_proto, is_mask);
1260 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6);
1263 /* For layer 3 packets the Ethernet type is provided
1264 * and treated as metadata but no MAC addresses are provided.
1266 if (!(*attrs & (1ULL << OVS_KEY_ATTR_ETHERNET)) &&
1267 (*attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)))
1268 mac_proto = MAC_PROTO_NONE;
1270 /* Always exact match mac_proto */
1271 SW_FLOW_KEY_PUT(match, mac_proto, is_mask ? 0xff : mac_proto, is_mask);
1273 if (mac_proto == MAC_PROTO_NONE)
1274 return parse_eth_type_from_nlattrs(match, attrs, a, is_mask,
1280 int nsh_hdr_from_nlattr(const struct nlattr *attr,
1281 struct nshhdr *nh, size_t size)
1289 /* validate_nsh has check this, so we needn't do duplicate check here
1291 if (size < NSH_BASE_HDR_LEN)
1294 nla_for_each_nested(a, attr, rem) {
1295 int type = nla_type(a);
1298 case OVS_NSH_KEY_ATTR_BASE: {
1299 const struct ovs_nsh_key_base *base = nla_data(a);
1301 flags = base->flags;
1304 nh->mdtype = base->mdtype;
1305 nh->path_hdr = base->path_hdr;
1308 case OVS_NSH_KEY_ATTR_MD1:
1310 if (mdlen > size - NSH_BASE_HDR_LEN)
1312 memcpy(&nh->md1, nla_data(a), mdlen);
1315 case OVS_NSH_KEY_ATTR_MD2:
1317 if (mdlen > size - NSH_BASE_HDR_LEN)
1319 memcpy(&nh->md2, nla_data(a), mdlen);
1327 /* nsh header length = NSH_BASE_HDR_LEN + mdlen */
1328 nh->ver_flags_ttl_len = 0;
1329 nsh_set_flags_ttl_len(nh, flags, ttl, NSH_BASE_HDR_LEN + mdlen);
1334 int nsh_key_from_nlattr(const struct nlattr *attr,
1335 struct ovs_key_nsh *nsh, struct ovs_key_nsh *nsh_mask)
1340 /* validate_nsh has check this, so we needn't do duplicate check here
1342 nla_for_each_nested(a, attr, rem) {
1343 int type = nla_type(a);
1346 case OVS_NSH_KEY_ATTR_BASE: {
1347 const struct ovs_nsh_key_base *base = nla_data(a);
1348 const struct ovs_nsh_key_base *base_mask = base + 1;
1351 nsh_mask->base = *base_mask;
1354 case OVS_NSH_KEY_ATTR_MD1: {
1355 const struct ovs_nsh_key_md1 *md1 = nla_data(a);
1356 const struct ovs_nsh_key_md1 *md1_mask = md1 + 1;
1358 memcpy(nsh->context, md1->context, sizeof(*md1));
1359 memcpy(nsh_mask->context, md1_mask->context,
1363 case OVS_NSH_KEY_ATTR_MD2:
1364 /* Not supported yet */
1374 static int nsh_key_put_from_nlattr(const struct nlattr *attr,
1375 struct sw_flow_match *match, bool is_mask,
1376 bool is_push_nsh, bool log)
1380 bool has_base = false;
1381 bool has_md1 = false;
1382 bool has_md2 = false;
1386 if (WARN_ON(is_push_nsh && is_mask))
1389 nla_for_each_nested(a, attr, rem) {
1390 int type = nla_type(a);
1393 if (type > OVS_NSH_KEY_ATTR_MAX) {
1394 OVS_NLERR(log, "nsh attr %d is out of range max %d",
1395 type, OVS_NSH_KEY_ATTR_MAX);
1399 if (!check_attr_len(nla_len(a),
1400 ovs_nsh_key_attr_lens[type].len)) {
1403 "nsh attr %d has unexpected len %d expected %d",
1406 ovs_nsh_key_attr_lens[type].len
1412 case OVS_NSH_KEY_ATTR_BASE: {
1413 const struct ovs_nsh_key_base *base = nla_data(a);
1416 mdtype = base->mdtype;
1417 SW_FLOW_KEY_PUT(match, nsh.base.flags,
1418 base->flags, is_mask);
1419 SW_FLOW_KEY_PUT(match, nsh.base.ttl,
1420 base->ttl, is_mask);
1421 SW_FLOW_KEY_PUT(match, nsh.base.mdtype,
1422 base->mdtype, is_mask);
1423 SW_FLOW_KEY_PUT(match, nsh.base.np,
1425 SW_FLOW_KEY_PUT(match, nsh.base.path_hdr,
1426 base->path_hdr, is_mask);
1429 case OVS_NSH_KEY_ATTR_MD1: {
1430 const struct ovs_nsh_key_md1 *md1 = nla_data(a);
1433 for (i = 0; i < NSH_MD1_CONTEXT_SIZE; i++)
1434 SW_FLOW_KEY_PUT(match, nsh.context[i],
1435 md1->context[i], is_mask);
1438 case OVS_NSH_KEY_ATTR_MD2:
1439 if (!is_push_nsh) /* Not supported MD type 2 yet */
1444 if (mdlen > NSH_CTX_HDRS_MAX_LEN || mdlen <= 0) {
1447 "Invalid MD length %d for MD type %d",
1455 OVS_NLERR(log, "Unknown nsh attribute %d",
1462 OVS_NLERR(log, "nsh attribute has %d unknown bytes.", rem);
1466 if (has_md1 && has_md2) {
1469 "invalid nsh attribute: md1 and md2 are exclusive."
1475 if ((has_md1 && mdtype != NSH_M_TYPE1) ||
1476 (has_md2 && mdtype != NSH_M_TYPE2)) {
1477 OVS_NLERR(1, "nsh attribute has unmatched MD type %d.",
1483 (!has_base || (!has_md1 && !has_md2))) {
1486 "push_nsh: missing base or metadata attributes"
1495 static int ovs_key_from_nlattrs(struct net *net, struct sw_flow_match *match,
1496 u64 attrs, const struct nlattr **a,
1497 bool is_mask, bool log)
1501 err = metadata_from_nlattrs(net, match, &attrs, a, is_mask, log);
1505 if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) {
1506 const struct ovs_key_ethernet *eth_key;
1508 eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]);
1509 SW_FLOW_KEY_MEMCPY(match, eth.src,
1510 eth_key->eth_src, ETH_ALEN, is_mask);
1511 SW_FLOW_KEY_MEMCPY(match, eth.dst,
1512 eth_key->eth_dst, ETH_ALEN, is_mask);
1513 attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET);
1515 if (attrs & (1 << OVS_KEY_ATTR_VLAN)) {
1516 /* VLAN attribute is always parsed before getting here since it
1517 * may occur multiple times.
1519 OVS_NLERR(log, "VLAN attribute unexpected.");
1523 if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) {
1524 err = parse_eth_type_from_nlattrs(match, &attrs, a, is_mask,
1528 } else if (!is_mask) {
1529 SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask);
1531 } else if (!match->key->eth.type) {
1532 OVS_NLERR(log, "Either Ethernet header or EtherType is required.");
1536 if (attrs & (1 << OVS_KEY_ATTR_IPV4)) {
1537 const struct ovs_key_ipv4 *ipv4_key;
1539 ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]);
1540 if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) {
1541 OVS_NLERR(log, "IPv4 frag type %d is out of range max %d",
1542 ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX);
1545 SW_FLOW_KEY_PUT(match, ip.proto,
1546 ipv4_key->ipv4_proto, is_mask);
1547 SW_FLOW_KEY_PUT(match, ip.tos,
1548 ipv4_key->ipv4_tos, is_mask);
1549 SW_FLOW_KEY_PUT(match, ip.ttl,
1550 ipv4_key->ipv4_ttl, is_mask);
1551 SW_FLOW_KEY_PUT(match, ip.frag,
1552 ipv4_key->ipv4_frag, is_mask);
1553 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
1554 ipv4_key->ipv4_src, is_mask);
1555 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
1556 ipv4_key->ipv4_dst, is_mask);
1557 attrs &= ~(1 << OVS_KEY_ATTR_IPV4);
1560 if (attrs & (1 << OVS_KEY_ATTR_IPV6)) {
1561 const struct ovs_key_ipv6 *ipv6_key;
1563 ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]);
1564 if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) {
1565 OVS_NLERR(log, "IPv6 frag type %d is out of range max %d",
1566 ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX);
1570 if (!is_mask && ipv6_key->ipv6_label & htonl(0xFFF00000)) {
1571 OVS_NLERR(log, "IPv6 flow label %x is out of range (max=%x)",
1572 ntohl(ipv6_key->ipv6_label), (1 << 20) - 1);
1576 SW_FLOW_KEY_PUT(match, ipv6.label,
1577 ipv6_key->ipv6_label, is_mask);
1578 SW_FLOW_KEY_PUT(match, ip.proto,
1579 ipv6_key->ipv6_proto, is_mask);
1580 SW_FLOW_KEY_PUT(match, ip.tos,
1581 ipv6_key->ipv6_tclass, is_mask);
1582 SW_FLOW_KEY_PUT(match, ip.ttl,
1583 ipv6_key->ipv6_hlimit, is_mask);
1584 SW_FLOW_KEY_PUT(match, ip.frag,
1585 ipv6_key->ipv6_frag, is_mask);
1586 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src,
1588 sizeof(match->key->ipv6.addr.src),
1590 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst,
1592 sizeof(match->key->ipv6.addr.dst),
1595 attrs &= ~(1 << OVS_KEY_ATTR_IPV6);
1598 if (attrs & (1 << OVS_KEY_ATTR_ARP)) {
1599 const struct ovs_key_arp *arp_key;
1601 arp_key = nla_data(a[OVS_KEY_ATTR_ARP]);
1602 if (!is_mask && (arp_key->arp_op & htons(0xff00))) {
1603 OVS_NLERR(log, "Unknown ARP opcode (opcode=%d).",
1608 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
1609 arp_key->arp_sip, is_mask);
1610 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
1611 arp_key->arp_tip, is_mask);
1612 SW_FLOW_KEY_PUT(match, ip.proto,
1613 ntohs(arp_key->arp_op), is_mask);
1614 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha,
1615 arp_key->arp_sha, ETH_ALEN, is_mask);
1616 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha,
1617 arp_key->arp_tha, ETH_ALEN, is_mask);
1619 attrs &= ~(1 << OVS_KEY_ATTR_ARP);
1622 if (attrs & (1 << OVS_KEY_ATTR_NSH)) {
1623 if (nsh_key_put_from_nlattr(a[OVS_KEY_ATTR_NSH], match,
1624 is_mask, false, log) < 0)
1626 attrs &= ~(1 << OVS_KEY_ATTR_NSH);
1629 if (attrs & (1 << OVS_KEY_ATTR_MPLS)) {
1630 const struct ovs_key_mpls *mpls_key;
1632 mpls_key = nla_data(a[OVS_KEY_ATTR_MPLS]);
1633 SW_FLOW_KEY_PUT(match, mpls.top_lse,
1634 mpls_key->mpls_lse, is_mask);
1636 attrs &= ~(1 << OVS_KEY_ATTR_MPLS);
1639 if (attrs & (1 << OVS_KEY_ATTR_TCP)) {
1640 const struct ovs_key_tcp *tcp_key;
1642 tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]);
1643 SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask);
1644 SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask);
1645 attrs &= ~(1 << OVS_KEY_ATTR_TCP);
1648 if (attrs & (1 << OVS_KEY_ATTR_TCP_FLAGS)) {
1649 SW_FLOW_KEY_PUT(match, tp.flags,
1650 nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]),
1652 attrs &= ~(1 << OVS_KEY_ATTR_TCP_FLAGS);
1655 if (attrs & (1 << OVS_KEY_ATTR_UDP)) {
1656 const struct ovs_key_udp *udp_key;
1658 udp_key = nla_data(a[OVS_KEY_ATTR_UDP]);
1659 SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask);
1660 SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask);
1661 attrs &= ~(1 << OVS_KEY_ATTR_UDP);
1664 if (attrs & (1 << OVS_KEY_ATTR_SCTP)) {
1665 const struct ovs_key_sctp *sctp_key;
1667 sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]);
1668 SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask);
1669 SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask);
1670 attrs &= ~(1 << OVS_KEY_ATTR_SCTP);
1673 if (attrs & (1 << OVS_KEY_ATTR_ICMP)) {
1674 const struct ovs_key_icmp *icmp_key;
1676 icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]);
1677 SW_FLOW_KEY_PUT(match, tp.src,
1678 htons(icmp_key->icmp_type), is_mask);
1679 SW_FLOW_KEY_PUT(match, tp.dst,
1680 htons(icmp_key->icmp_code), is_mask);
1681 attrs &= ~(1 << OVS_KEY_ATTR_ICMP);
1684 if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) {
1685 const struct ovs_key_icmpv6 *icmpv6_key;
1687 icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]);
1688 SW_FLOW_KEY_PUT(match, tp.src,
1689 htons(icmpv6_key->icmpv6_type), is_mask);
1690 SW_FLOW_KEY_PUT(match, tp.dst,
1691 htons(icmpv6_key->icmpv6_code), is_mask);
1692 attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6);
1695 if (attrs & (1 << OVS_KEY_ATTR_ND)) {
1696 const struct ovs_key_nd *nd_key;
1698 nd_key = nla_data(a[OVS_KEY_ATTR_ND]);
1699 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target,
1701 sizeof(match->key->ipv6.nd.target),
1703 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll,
1704 nd_key->nd_sll, ETH_ALEN, is_mask);
1705 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll,
1706 nd_key->nd_tll, ETH_ALEN, is_mask);
1707 attrs &= ~(1 << OVS_KEY_ATTR_ND);
1711 OVS_NLERR(log, "Unknown key attributes %llx",
1712 (unsigned long long)attrs);
1719 static void nlattr_set(struct nlattr *attr, u8 val,
1720 const struct ovs_len_tbl *tbl)
1725 /* The nlattr stream should already have been validated */
1726 nla_for_each_nested(nla, attr, rem) {
1727 if (tbl[nla_type(nla)].len == OVS_ATTR_NESTED)
1728 nlattr_set(nla, val, tbl[nla_type(nla)].next ? : tbl);
1730 memset(nla_data(nla), val, nla_len(nla));
1732 if (nla_type(nla) == OVS_KEY_ATTR_CT_STATE)
1733 *(u32 *)nla_data(nla) &= CT_SUPPORTED_MASK;
1737 static void mask_set_nlattr(struct nlattr *attr, u8 val)
1739 nlattr_set(attr, val, ovs_key_lens);
1743 * ovs_nla_get_match - parses Netlink attributes into a flow key and
1744 * mask. In case the 'mask' is NULL, the flow is treated as exact match
1745 * flow. Otherwise, it is treated as a wildcarded flow, except the mask
1746 * does not include any don't care bit.
1747 * @net: Used to determine per-namespace field support.
1748 * @match: receives the extracted flow match information.
1749 * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
1750 * sequence. The fields should of the packet that triggered the creation
1752 * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink
1753 * attribute specifies the mask field of the wildcarded flow.
1754 * @log: Boolean to allow kernel error logging. Normally true, but when
1755 * probing for feature compatibility this should be passed in as false to
1756 * suppress unnecessary error logging.
1758 int ovs_nla_get_match(struct net *net, struct sw_flow_match *match,
1759 const struct nlattr *nla_key,
1760 const struct nlattr *nla_mask,
1763 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
1764 struct nlattr *newmask = NULL;
1769 err = parse_flow_nlattrs(nla_key, a, &key_attrs, log);
1773 err = parse_vlan_from_nlattrs(match, &key_attrs, a, false, log);
1777 err = ovs_key_from_nlattrs(net, match, key_attrs, a, false, log);
1783 /* Create an exact match mask. We need to set to 0xff
1784 * all the 'match->mask' fields that have been touched
1785 * in 'match->key'. We cannot simply memset
1786 * 'match->mask', because padding bytes and fields not
1787 * specified in 'match->key' should be left to 0.
1788 * Instead, we use a stream of netlink attributes,
1789 * copied from 'key' and set to 0xff.
1790 * ovs_key_from_nlattrs() will take care of filling
1791 * 'match->mask' appropriately.
1793 newmask = kmemdup(nla_key,
1794 nla_total_size(nla_len(nla_key)),
1799 mask_set_nlattr(newmask, 0xff);
1801 /* The userspace does not send tunnel attributes that
1802 * are 0, but we should not wildcard them nonetheless.
1804 if (match->key->tun_proto)
1805 SW_FLOW_KEY_MEMSET_FIELD(match, tun_key,
1811 err = parse_flow_mask_nlattrs(nla_mask, a, &mask_attrs, log);
1815 /* Always match on tci. */
1816 SW_FLOW_KEY_PUT(match, eth.vlan.tci, htons(0xffff), true);
1817 SW_FLOW_KEY_PUT(match, eth.cvlan.tci, htons(0xffff), true);
1819 err = parse_vlan_from_nlattrs(match, &mask_attrs, a, true, log);
1823 err = ovs_key_from_nlattrs(net, match, mask_attrs, a, true,
1829 if (!match_validate(match, key_attrs, mask_attrs, log))
1837 static size_t get_ufid_len(const struct nlattr *attr, bool log)
1844 len = nla_len(attr);
1845 if (len < 1 || len > MAX_UFID_LENGTH) {
1846 OVS_NLERR(log, "ufid size %u bytes exceeds the range (1, %d)",
1847 nla_len(attr), MAX_UFID_LENGTH);
1854 /* Initializes 'flow->ufid', returning true if 'attr' contains a valid UFID,
1855 * or false otherwise.
1857 bool ovs_nla_get_ufid(struct sw_flow_id *sfid, const struct nlattr *attr,
1860 sfid->ufid_len = get_ufid_len(attr, log);
1862 memcpy(sfid->ufid, nla_data(attr), sfid->ufid_len);
1864 return sfid->ufid_len;
1867 int ovs_nla_get_identifier(struct sw_flow_id *sfid, const struct nlattr *ufid,
1868 const struct sw_flow_key *key, bool log)
1870 struct sw_flow_key *new_key;
1872 if (ovs_nla_get_ufid(sfid, ufid, log))
1875 /* If UFID was not provided, use unmasked key. */
1876 new_key = kmalloc(sizeof(*new_key), GFP_KERNEL);
1879 memcpy(new_key, key, sizeof(*key));
1880 sfid->unmasked_key = new_key;
1885 u32 ovs_nla_get_ufid_flags(const struct nlattr *attr)
1887 return attr ? nla_get_u32(attr) : 0;
1891 * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key.
1892 * @net: Network namespace.
1893 * @key: Receives extracted in_port, priority, tun_key, skb_mark and conntrack
1895 * @a: Array of netlink attributes holding parsed %OVS_KEY_ATTR_* Netlink
1897 * @attrs: Bit mask for the netlink attributes included in @a.
1898 * @log: Boolean to allow kernel error logging. Normally true, but when
1899 * probing for feature compatibility this should be passed in as false to
1900 * suppress unnecessary error logging.
1902 * This parses a series of Netlink attributes that form a flow key, which must
1903 * take the same form accepted by flow_from_nlattrs(), but only enough of it to
1904 * get the metadata, that is, the parts of the flow key that cannot be
1905 * extracted from the packet itself.
1907 * This must be called before the packet key fields are filled in 'key'.
1910 int ovs_nla_get_flow_metadata(struct net *net,
1911 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1],
1912 u64 attrs, struct sw_flow_key *key, bool log)
1914 struct sw_flow_match match;
1916 memset(&match, 0, sizeof(match));
1921 key->ct_orig_proto = 0;
1922 memset(&key->ct, 0, sizeof(key->ct));
1923 memset(&key->ipv4.ct_orig, 0, sizeof(key->ipv4.ct_orig));
1924 memset(&key->ipv6.ct_orig, 0, sizeof(key->ipv6.ct_orig));
1926 key->phy.in_port = DP_MAX_PORTS;
1928 return metadata_from_nlattrs(net, &match, &attrs, a, false, log);
1931 static int ovs_nla_put_vlan(struct sk_buff *skb, const struct vlan_head *vh,
1934 __be16 eth_type = !is_mask ? vh->tpid : htons(0xffff);
1936 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) ||
1937 nla_put_be16(skb, OVS_KEY_ATTR_VLAN, vh->tci))
1942 static int nsh_key_to_nlattr(const struct ovs_key_nsh *nsh, bool is_mask,
1943 struct sk_buff *skb)
1945 struct nlattr *start;
1947 start = nla_nest_start_noflag(skb, OVS_KEY_ATTR_NSH);
1951 if (nla_put(skb, OVS_NSH_KEY_ATTR_BASE, sizeof(nsh->base), &nsh->base))
1952 goto nla_put_failure;
1954 if (is_mask || nsh->base.mdtype == NSH_M_TYPE1) {
1955 if (nla_put(skb, OVS_NSH_KEY_ATTR_MD1,
1956 sizeof(nsh->context), nsh->context))
1957 goto nla_put_failure;
1960 /* Don't support MD type 2 yet */
1962 nla_nest_end(skb, start);
1970 static int __ovs_nla_put_key(const struct sw_flow_key *swkey,
1971 const struct sw_flow_key *output, bool is_mask,
1972 struct sk_buff *skb)
1974 struct ovs_key_ethernet *eth_key;
1976 struct nlattr *encap = NULL;
1977 struct nlattr *in_encap = NULL;
1979 if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id))
1980 goto nla_put_failure;
1982 if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash))
1983 goto nla_put_failure;
1985 if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority))
1986 goto nla_put_failure;
1988 if ((swkey->tun_proto || is_mask)) {
1989 const void *opts = NULL;
1991 if (output->tun_key.tun_flags & TUNNEL_OPTIONS_PRESENT)
1992 opts = TUN_METADATA_OPTS(output, swkey->tun_opts_len);
1994 if (ip_tun_to_nlattr(skb, &output->tun_key, opts,
1995 swkey->tun_opts_len, swkey->tun_proto, 0))
1996 goto nla_put_failure;
1999 if (swkey->phy.in_port == DP_MAX_PORTS) {
2000 if (is_mask && (output->phy.in_port == 0xffff))
2001 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff))
2002 goto nla_put_failure;
2005 upper_u16 = !is_mask ? 0 : 0xffff;
2007 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT,
2008 (upper_u16 << 16) | output->phy.in_port))
2009 goto nla_put_failure;
2012 if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark))
2013 goto nla_put_failure;
2015 if (ovs_ct_put_key(swkey, output, skb))
2016 goto nla_put_failure;
2018 if (ovs_key_mac_proto(swkey) == MAC_PROTO_ETHERNET) {
2019 nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key));
2021 goto nla_put_failure;
2023 eth_key = nla_data(nla);
2024 ether_addr_copy(eth_key->eth_src, output->eth.src);
2025 ether_addr_copy(eth_key->eth_dst, output->eth.dst);
2027 if (swkey->eth.vlan.tci || eth_type_vlan(swkey->eth.type)) {
2028 if (ovs_nla_put_vlan(skb, &output->eth.vlan, is_mask))
2029 goto nla_put_failure;
2030 encap = nla_nest_start_noflag(skb, OVS_KEY_ATTR_ENCAP);
2031 if (!swkey->eth.vlan.tci)
2034 if (swkey->eth.cvlan.tci || eth_type_vlan(swkey->eth.type)) {
2035 if (ovs_nla_put_vlan(skb, &output->eth.cvlan, is_mask))
2036 goto nla_put_failure;
2037 in_encap = nla_nest_start_noflag(skb,
2038 OVS_KEY_ATTR_ENCAP);
2039 if (!swkey->eth.cvlan.tci)
2044 if (swkey->eth.type == htons(ETH_P_802_2)) {
2046 * Ethertype 802.2 is represented in the netlink with omitted
2047 * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and
2048 * 0xffff in the mask attribute. Ethertype can also
2051 if (is_mask && output->eth.type)
2052 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE,
2054 goto nla_put_failure;
2059 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type))
2060 goto nla_put_failure;
2062 if (eth_type_vlan(swkey->eth.type)) {
2063 /* There are 3 VLAN tags, we don't know anything about the rest
2064 * of the packet, so truncate here.
2066 WARN_ON_ONCE(!(encap && in_encap));
2070 if (swkey->eth.type == htons(ETH_P_IP)) {
2071 struct ovs_key_ipv4 *ipv4_key;
2073 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key));
2075 goto nla_put_failure;
2076 ipv4_key = nla_data(nla);
2077 ipv4_key->ipv4_src = output->ipv4.addr.src;
2078 ipv4_key->ipv4_dst = output->ipv4.addr.dst;
2079 ipv4_key->ipv4_proto = output->ip.proto;
2080 ipv4_key->ipv4_tos = output->ip.tos;
2081 ipv4_key->ipv4_ttl = output->ip.ttl;
2082 ipv4_key->ipv4_frag = output->ip.frag;
2083 } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
2084 struct ovs_key_ipv6 *ipv6_key;
2086 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key));
2088 goto nla_put_failure;
2089 ipv6_key = nla_data(nla);
2090 memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src,
2091 sizeof(ipv6_key->ipv6_src));
2092 memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst,
2093 sizeof(ipv6_key->ipv6_dst));
2094 ipv6_key->ipv6_label = output->ipv6.label;
2095 ipv6_key->ipv6_proto = output->ip.proto;
2096 ipv6_key->ipv6_tclass = output->ip.tos;
2097 ipv6_key->ipv6_hlimit = output->ip.ttl;
2098 ipv6_key->ipv6_frag = output->ip.frag;
2099 } else if (swkey->eth.type == htons(ETH_P_NSH)) {
2100 if (nsh_key_to_nlattr(&output->nsh, is_mask, skb))
2101 goto nla_put_failure;
2102 } else if (swkey->eth.type == htons(ETH_P_ARP) ||
2103 swkey->eth.type == htons(ETH_P_RARP)) {
2104 struct ovs_key_arp *arp_key;
2106 nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key));
2108 goto nla_put_failure;
2109 arp_key = nla_data(nla);
2110 memset(arp_key, 0, sizeof(struct ovs_key_arp));
2111 arp_key->arp_sip = output->ipv4.addr.src;
2112 arp_key->arp_tip = output->ipv4.addr.dst;
2113 arp_key->arp_op = htons(output->ip.proto);
2114 ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha);
2115 ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha);
2116 } else if (eth_p_mpls(swkey->eth.type)) {
2117 struct ovs_key_mpls *mpls_key;
2119 nla = nla_reserve(skb, OVS_KEY_ATTR_MPLS, sizeof(*mpls_key));
2121 goto nla_put_failure;
2122 mpls_key = nla_data(nla);
2123 mpls_key->mpls_lse = output->mpls.top_lse;
2126 if ((swkey->eth.type == htons(ETH_P_IP) ||
2127 swkey->eth.type == htons(ETH_P_IPV6)) &&
2128 swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
2130 if (swkey->ip.proto == IPPROTO_TCP) {
2131 struct ovs_key_tcp *tcp_key;
2133 nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key));
2135 goto nla_put_failure;
2136 tcp_key = nla_data(nla);
2137 tcp_key->tcp_src = output->tp.src;
2138 tcp_key->tcp_dst = output->tp.dst;
2139 if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS,
2141 goto nla_put_failure;
2142 } else if (swkey->ip.proto == IPPROTO_UDP) {
2143 struct ovs_key_udp *udp_key;
2145 nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key));
2147 goto nla_put_failure;
2148 udp_key = nla_data(nla);
2149 udp_key->udp_src = output->tp.src;
2150 udp_key->udp_dst = output->tp.dst;
2151 } else if (swkey->ip.proto == IPPROTO_SCTP) {
2152 struct ovs_key_sctp *sctp_key;
2154 nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key));
2156 goto nla_put_failure;
2157 sctp_key = nla_data(nla);
2158 sctp_key->sctp_src = output->tp.src;
2159 sctp_key->sctp_dst = output->tp.dst;
2160 } else if (swkey->eth.type == htons(ETH_P_IP) &&
2161 swkey->ip.proto == IPPROTO_ICMP) {
2162 struct ovs_key_icmp *icmp_key;
2164 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key));
2166 goto nla_put_failure;
2167 icmp_key = nla_data(nla);
2168 icmp_key->icmp_type = ntohs(output->tp.src);
2169 icmp_key->icmp_code = ntohs(output->tp.dst);
2170 } else if (swkey->eth.type == htons(ETH_P_IPV6) &&
2171 swkey->ip.proto == IPPROTO_ICMPV6) {
2172 struct ovs_key_icmpv6 *icmpv6_key;
2174 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6,
2175 sizeof(*icmpv6_key));
2177 goto nla_put_failure;
2178 icmpv6_key = nla_data(nla);
2179 icmpv6_key->icmpv6_type = ntohs(output->tp.src);
2180 icmpv6_key->icmpv6_code = ntohs(output->tp.dst);
2182 if (swkey->tp.src == htons(NDISC_NEIGHBOUR_SOLICITATION) ||
2183 swkey->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) {
2184 struct ovs_key_nd *nd_key;
2186 nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key));
2188 goto nla_put_failure;
2189 nd_key = nla_data(nla);
2190 memcpy(nd_key->nd_target, &output->ipv6.nd.target,
2191 sizeof(nd_key->nd_target));
2192 ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll);
2193 ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll);
2200 nla_nest_end(skb, in_encap);
2202 nla_nest_end(skb, encap);
2210 int ovs_nla_put_key(const struct sw_flow_key *swkey,
2211 const struct sw_flow_key *output, int attr, bool is_mask,
2212 struct sk_buff *skb)
2217 nla = nla_nest_start_noflag(skb, attr);
2220 err = __ovs_nla_put_key(swkey, output, is_mask, skb);
2223 nla_nest_end(skb, nla);
2228 /* Called with ovs_mutex or RCU read lock. */
2229 int ovs_nla_put_identifier(const struct sw_flow *flow, struct sk_buff *skb)
2231 if (ovs_identifier_is_ufid(&flow->id))
2232 return nla_put(skb, OVS_FLOW_ATTR_UFID, flow->id.ufid_len,
2235 return ovs_nla_put_key(flow->id.unmasked_key, flow->id.unmasked_key,
2236 OVS_FLOW_ATTR_KEY, false, skb);
2239 /* Called with ovs_mutex or RCU read lock. */
2240 int ovs_nla_put_masked_key(const struct sw_flow *flow, struct sk_buff *skb)
2242 return ovs_nla_put_key(&flow->key, &flow->key,
2243 OVS_FLOW_ATTR_KEY, false, skb);
2246 /* Called with ovs_mutex or RCU read lock. */
2247 int ovs_nla_put_mask(const struct sw_flow *flow, struct sk_buff *skb)
2249 return ovs_nla_put_key(&flow->key, &flow->mask->key,
2250 OVS_FLOW_ATTR_MASK, true, skb);
2253 #define MAX_ACTIONS_BUFSIZE (32 * 1024)
2255 static struct sw_flow_actions *nla_alloc_flow_actions(int size)
2257 struct sw_flow_actions *sfa;
2259 WARN_ON_ONCE(size > MAX_ACTIONS_BUFSIZE);
2261 sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL);
2263 return ERR_PTR(-ENOMEM);
2265 sfa->actions_len = 0;
2269 static void ovs_nla_free_nested_actions(const struct nlattr *actions, int len);
2271 static void ovs_nla_free_check_pkt_len_action(const struct nlattr *action)
2273 const struct nlattr *a;
2276 nla_for_each_nested(a, action, rem) {
2277 switch (nla_type(a)) {
2278 case OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL:
2279 case OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER:
2280 ovs_nla_free_nested_actions(nla_data(a), nla_len(a));
2286 static void ovs_nla_free_clone_action(const struct nlattr *action)
2288 const struct nlattr *a = nla_data(action);
2289 int rem = nla_len(action);
2291 switch (nla_type(a)) {
2292 case OVS_CLONE_ATTR_EXEC:
2293 /* The real list of actions follows this attribute. */
2294 a = nla_next(a, &rem);
2295 ovs_nla_free_nested_actions(a, rem);
2300 static void ovs_nla_free_sample_action(const struct nlattr *action)
2302 const struct nlattr *a = nla_data(action);
2303 int rem = nla_len(action);
2305 switch (nla_type(a)) {
2306 case OVS_SAMPLE_ATTR_ARG:
2307 /* The real list of actions follows this attribute. */
2308 a = nla_next(a, &rem);
2309 ovs_nla_free_nested_actions(a, rem);
2314 static void ovs_nla_free_set_action(const struct nlattr *a)
2316 const struct nlattr *ovs_key = nla_data(a);
2317 struct ovs_tunnel_info *ovs_tun;
2319 switch (nla_type(ovs_key)) {
2320 case OVS_KEY_ATTR_TUNNEL_INFO:
2321 ovs_tun = nla_data(ovs_key);
2322 dst_release((struct dst_entry *)ovs_tun->tun_dst);
2327 static void ovs_nla_free_nested_actions(const struct nlattr *actions, int len)
2329 const struct nlattr *a;
2332 /* Whenever new actions are added, the need to update this
2333 * function should be considered.
2335 BUILD_BUG_ON(OVS_ACTION_ATTR_MAX != 21);
2340 nla_for_each_attr(a, actions, len, rem) {
2341 switch (nla_type(a)) {
2342 case OVS_ACTION_ATTR_CHECK_PKT_LEN:
2343 ovs_nla_free_check_pkt_len_action(a);
2346 case OVS_ACTION_ATTR_CLONE:
2347 ovs_nla_free_clone_action(a);
2350 case OVS_ACTION_ATTR_CT:
2351 ovs_ct_free_action(a);
2354 case OVS_ACTION_ATTR_SAMPLE:
2355 ovs_nla_free_sample_action(a);
2358 case OVS_ACTION_ATTR_SET:
2359 ovs_nla_free_set_action(a);
2365 void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts)
2370 ovs_nla_free_nested_actions(sf_acts->actions, sf_acts->actions_len);
2374 static void __ovs_nla_free_flow_actions(struct rcu_head *head)
2376 ovs_nla_free_flow_actions(container_of(head, struct sw_flow_actions, rcu));
2379 /* Schedules 'sf_acts' to be freed after the next RCU grace period.
2380 * The caller must hold rcu_read_lock for this to be sensible. */
2381 void ovs_nla_free_flow_actions_rcu(struct sw_flow_actions *sf_acts)
2383 call_rcu(&sf_acts->rcu, __ovs_nla_free_flow_actions);
2386 static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa,
2387 int attr_len, bool log)
2390 struct sw_flow_actions *acts;
2392 size_t req_size = NLA_ALIGN(attr_len);
2393 int next_offset = offsetof(struct sw_flow_actions, actions) +
2394 (*sfa)->actions_len;
2396 if (req_size <= (ksize(*sfa) - next_offset))
2399 new_acts_size = max(next_offset + req_size, ksize(*sfa) * 2);
2401 if (new_acts_size > MAX_ACTIONS_BUFSIZE) {
2402 if ((next_offset + req_size) > MAX_ACTIONS_BUFSIZE) {
2403 OVS_NLERR(log, "Flow action size exceeds max %u",
2404 MAX_ACTIONS_BUFSIZE);
2405 return ERR_PTR(-EMSGSIZE);
2407 new_acts_size = MAX_ACTIONS_BUFSIZE;
2410 acts = nla_alloc_flow_actions(new_acts_size);
2412 return (void *)acts;
2414 memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len);
2415 acts->actions_len = (*sfa)->actions_len;
2416 acts->orig_len = (*sfa)->orig_len;
2421 (*sfa)->actions_len += req_size;
2422 return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset);
2425 static struct nlattr *__add_action(struct sw_flow_actions **sfa,
2426 int attrtype, void *data, int len, bool log)
2430 a = reserve_sfa_size(sfa, nla_attr_size(len), log);
2434 a->nla_type = attrtype;
2435 a->nla_len = nla_attr_size(len);
2438 memcpy(nla_data(a), data, len);
2439 memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len));
2444 int ovs_nla_add_action(struct sw_flow_actions **sfa, int attrtype, void *data,
2449 a = __add_action(sfa, attrtype, data, len, log);
2451 return PTR_ERR_OR_ZERO(a);
2454 static inline int add_nested_action_start(struct sw_flow_actions **sfa,
2455 int attrtype, bool log)
2457 int used = (*sfa)->actions_len;
2460 err = ovs_nla_add_action(sfa, attrtype, NULL, 0, log);
2467 static inline void add_nested_action_end(struct sw_flow_actions *sfa,
2470 struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions +
2473 a->nla_len = sfa->actions_len - st_offset;
2476 static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
2477 const struct sw_flow_key *key,
2478 struct sw_flow_actions **sfa,
2479 __be16 eth_type, __be16 vlan_tci, bool log);
2481 static int validate_and_copy_sample(struct net *net, const struct nlattr *attr,
2482 const struct sw_flow_key *key,
2483 struct sw_flow_actions **sfa,
2484 __be16 eth_type, __be16 vlan_tci,
2485 bool log, bool last)
2487 const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];
2488 const struct nlattr *probability, *actions;
2489 const struct nlattr *a;
2490 int rem, start, err;
2491 struct sample_arg arg;
2493 memset(attrs, 0, sizeof(attrs));
2494 nla_for_each_nested(a, attr, rem) {
2495 int type = nla_type(a);
2496 if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type])
2503 probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY];
2504 if (!probability || nla_len(probability) != sizeof(u32))
2507 actions = attrs[OVS_SAMPLE_ATTR_ACTIONS];
2508 if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN))
2511 /* validation done, copy sample action. */
2512 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE, log);
2516 /* When both skb and flow may be changed, put the sample
2517 * into a deferred fifo. On the other hand, if only skb
2518 * may be modified, the actions can be executed in place.
2520 * Do this analysis at the flow installation time.
2521 * Set 'clone_action->exec' to true if the actions can be
2522 * executed without being deferred.
2524 * If the sample is the last action, it can always be excuted
2525 * rather than deferred.
2527 arg.exec = last || !actions_may_change_flow(actions);
2528 arg.probability = nla_get_u32(probability);
2530 err = ovs_nla_add_action(sfa, OVS_SAMPLE_ATTR_ARG, &arg, sizeof(arg),
2535 err = __ovs_nla_copy_actions(net, actions, key, sfa,
2536 eth_type, vlan_tci, log);
2541 add_nested_action_end(*sfa, start);
2546 static int validate_and_copy_clone(struct net *net,
2547 const struct nlattr *attr,
2548 const struct sw_flow_key *key,
2549 struct sw_flow_actions **sfa,
2550 __be16 eth_type, __be16 vlan_tci,
2551 bool log, bool last)
2556 if (nla_len(attr) && nla_len(attr) < NLA_HDRLEN)
2559 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_CLONE, log);
2563 exec = last || !actions_may_change_flow(attr);
2565 err = ovs_nla_add_action(sfa, OVS_CLONE_ATTR_EXEC, &exec,
2570 err = __ovs_nla_copy_actions(net, attr, key, sfa,
2571 eth_type, vlan_tci, log);
2575 add_nested_action_end(*sfa, start);
2580 void ovs_match_init(struct sw_flow_match *match,
2581 struct sw_flow_key *key,
2583 struct sw_flow_mask *mask)
2585 memset(match, 0, sizeof(*match));
2590 memset(key, 0, sizeof(*key));
2593 memset(&mask->key, 0, sizeof(mask->key));
2594 mask->range.start = mask->range.end = 0;
2598 static int validate_geneve_opts(struct sw_flow_key *key)
2600 struct geneve_opt *option;
2601 int opts_len = key->tun_opts_len;
2602 bool crit_opt = false;
2604 option = (struct geneve_opt *)TUN_METADATA_OPTS(key, key->tun_opts_len);
2605 while (opts_len > 0) {
2608 if (opts_len < sizeof(*option))
2611 len = sizeof(*option) + option->length * 4;
2615 crit_opt |= !!(option->type & GENEVE_CRIT_OPT_TYPE);
2617 option = (struct geneve_opt *)((u8 *)option + len);
2621 key->tun_key.tun_flags |= crit_opt ? TUNNEL_CRIT_OPT : 0;
2626 static int validate_and_copy_set_tun(const struct nlattr *attr,
2627 struct sw_flow_actions **sfa, bool log)
2629 struct sw_flow_match match;
2630 struct sw_flow_key key;
2631 struct metadata_dst *tun_dst;
2632 struct ip_tunnel_info *tun_info;
2633 struct ovs_tunnel_info *ovs_tun;
2635 int err = 0, start, opts_type;
2636 __be16 dst_opt_type;
2639 ovs_match_init(&match, &key, true, NULL);
2640 opts_type = ip_tun_from_nlattr(nla_data(attr), &match, false, log);
2644 if (key.tun_opts_len) {
2645 switch (opts_type) {
2646 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
2647 err = validate_geneve_opts(&key);
2650 dst_opt_type = TUNNEL_GENEVE_OPT;
2652 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
2653 dst_opt_type = TUNNEL_VXLAN_OPT;
2655 case OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS:
2656 dst_opt_type = TUNNEL_ERSPAN_OPT;
2661 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET, log);
2665 tun_dst = metadata_dst_alloc(key.tun_opts_len, METADATA_IP_TUNNEL,
2671 err = dst_cache_init(&tun_dst->u.tun_info.dst_cache, GFP_KERNEL);
2673 dst_release((struct dst_entry *)tun_dst);
2677 a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL,
2678 sizeof(*ovs_tun), log);
2680 dst_release((struct dst_entry *)tun_dst);
2684 ovs_tun = nla_data(a);
2685 ovs_tun->tun_dst = tun_dst;
2687 tun_info = &tun_dst->u.tun_info;
2688 tun_info->mode = IP_TUNNEL_INFO_TX;
2689 if (key.tun_proto == AF_INET6)
2690 tun_info->mode |= IP_TUNNEL_INFO_IPV6;
2691 else if (key.tun_proto == AF_INET && key.tun_key.u.ipv4.dst == 0)
2692 tun_info->mode |= IP_TUNNEL_INFO_BRIDGE;
2693 tun_info->key = key.tun_key;
2695 /* We need to store the options in the action itself since
2696 * everything else will go away after flow setup. We can append
2697 * it to tun_info and then point there.
2699 ip_tunnel_info_opts_set(tun_info,
2700 TUN_METADATA_OPTS(&key, key.tun_opts_len),
2701 key.tun_opts_len, dst_opt_type);
2702 add_nested_action_end(*sfa, start);
2707 static bool validate_nsh(const struct nlattr *attr, bool is_mask,
2708 bool is_push_nsh, bool log)
2710 struct sw_flow_match match;
2711 struct sw_flow_key key;
2714 ovs_match_init(&match, &key, true, NULL);
2715 ret = nsh_key_put_from_nlattr(attr, &match, is_mask,
2720 /* Return false if there are any non-masked bits set.
2721 * Mask follows data immediately, before any netlink padding.
2723 static bool validate_masked(u8 *data, int len)
2725 u8 *mask = data + len;
2728 if (*data++ & ~*mask++)
2734 static int validate_set(const struct nlattr *a,
2735 const struct sw_flow_key *flow_key,
2736 struct sw_flow_actions **sfa, bool *skip_copy,
2737 u8 mac_proto, __be16 eth_type, bool masked, bool log)
2739 const struct nlattr *ovs_key = nla_data(a);
2740 int key_type = nla_type(ovs_key);
2743 /* There can be only one key in a action */
2744 if (nla_total_size(nla_len(ovs_key)) != nla_len(a))
2747 key_len = nla_len(ovs_key);
2751 if (key_type > OVS_KEY_ATTR_MAX ||
2752 !check_attr_len(key_len, ovs_key_lens[key_type].len))
2755 if (masked && !validate_masked(nla_data(ovs_key), key_len))
2759 const struct ovs_key_ipv4 *ipv4_key;
2760 const struct ovs_key_ipv6 *ipv6_key;
2763 case OVS_KEY_ATTR_PRIORITY:
2764 case OVS_KEY_ATTR_SKB_MARK:
2765 case OVS_KEY_ATTR_CT_MARK:
2766 case OVS_KEY_ATTR_CT_LABELS:
2769 case OVS_KEY_ATTR_ETHERNET:
2770 if (mac_proto != MAC_PROTO_ETHERNET)
2774 case OVS_KEY_ATTR_TUNNEL:
2776 return -EINVAL; /* Masked tunnel set not supported. */
2779 err = validate_and_copy_set_tun(a, sfa, log);
2784 case OVS_KEY_ATTR_IPV4:
2785 if (eth_type != htons(ETH_P_IP))
2788 ipv4_key = nla_data(ovs_key);
2791 const struct ovs_key_ipv4 *mask = ipv4_key + 1;
2793 /* Non-writeable fields. */
2794 if (mask->ipv4_proto || mask->ipv4_frag)
2797 if (ipv4_key->ipv4_proto != flow_key->ip.proto)
2800 if (ipv4_key->ipv4_frag != flow_key->ip.frag)
2805 case OVS_KEY_ATTR_IPV6:
2806 if (eth_type != htons(ETH_P_IPV6))
2809 ipv6_key = nla_data(ovs_key);
2812 const struct ovs_key_ipv6 *mask = ipv6_key + 1;
2814 /* Non-writeable fields. */
2815 if (mask->ipv6_proto || mask->ipv6_frag)
2818 /* Invalid bits in the flow label mask? */
2819 if (ntohl(mask->ipv6_label) & 0xFFF00000)
2822 if (ipv6_key->ipv6_proto != flow_key->ip.proto)
2825 if (ipv6_key->ipv6_frag != flow_key->ip.frag)
2828 if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000)
2833 case OVS_KEY_ATTR_TCP:
2834 if ((eth_type != htons(ETH_P_IP) &&
2835 eth_type != htons(ETH_P_IPV6)) ||
2836 flow_key->ip.proto != IPPROTO_TCP)
2841 case OVS_KEY_ATTR_UDP:
2842 if ((eth_type != htons(ETH_P_IP) &&
2843 eth_type != htons(ETH_P_IPV6)) ||
2844 flow_key->ip.proto != IPPROTO_UDP)
2849 case OVS_KEY_ATTR_MPLS:
2850 if (!eth_p_mpls(eth_type))
2854 case OVS_KEY_ATTR_SCTP:
2855 if ((eth_type != htons(ETH_P_IP) &&
2856 eth_type != htons(ETH_P_IPV6)) ||
2857 flow_key->ip.proto != IPPROTO_SCTP)
2862 case OVS_KEY_ATTR_NSH:
2863 if (eth_type != htons(ETH_P_NSH))
2865 if (!validate_nsh(nla_data(a), masked, false, log))
2873 /* Convert non-masked non-tunnel set actions to masked set actions. */
2874 if (!masked && key_type != OVS_KEY_ATTR_TUNNEL) {
2875 int start, len = key_len * 2;
2880 start = add_nested_action_start(sfa,
2881 OVS_ACTION_ATTR_SET_TO_MASKED,
2886 at = __add_action(sfa, key_type, NULL, len, log);
2890 memcpy(nla_data(at), nla_data(ovs_key), key_len); /* Key. */
2891 memset(nla_data(at) + key_len, 0xff, key_len); /* Mask. */
2892 /* Clear non-writeable bits from otherwise writeable fields. */
2893 if (key_type == OVS_KEY_ATTR_IPV6) {
2894 struct ovs_key_ipv6 *mask = nla_data(at) + key_len;
2896 mask->ipv6_label &= htonl(0x000FFFFF);
2898 add_nested_action_end(*sfa, start);
2904 static int validate_userspace(const struct nlattr *attr)
2906 static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = {
2907 [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 },
2908 [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC },
2909 [OVS_USERSPACE_ATTR_EGRESS_TUN_PORT] = {.type = NLA_U32 },
2911 struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];
2914 error = nla_parse_nested_deprecated(a, OVS_USERSPACE_ATTR_MAX, attr,
2915 userspace_policy, NULL);
2919 if (!a[OVS_USERSPACE_ATTR_PID] ||
2920 !nla_get_u32(a[OVS_USERSPACE_ATTR_PID]))
2926 static const struct nla_policy cpl_policy[OVS_CHECK_PKT_LEN_ATTR_MAX + 1] = {
2927 [OVS_CHECK_PKT_LEN_ATTR_PKT_LEN] = {.type = NLA_U16 },
2928 [OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER] = {.type = NLA_NESTED },
2929 [OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL] = {.type = NLA_NESTED },
2932 static int validate_and_copy_check_pkt_len(struct net *net,
2933 const struct nlattr *attr,
2934 const struct sw_flow_key *key,
2935 struct sw_flow_actions **sfa,
2936 __be16 eth_type, __be16 vlan_tci,
2937 bool log, bool last)
2939 const struct nlattr *acts_if_greater, *acts_if_lesser_eq;
2940 struct nlattr *a[OVS_CHECK_PKT_LEN_ATTR_MAX + 1];
2941 struct check_pkt_len_arg arg;
2942 int nested_acts_start;
2945 err = nla_parse_deprecated_strict(a, OVS_CHECK_PKT_LEN_ATTR_MAX,
2946 nla_data(attr), nla_len(attr),
2951 if (!a[OVS_CHECK_PKT_LEN_ATTR_PKT_LEN] ||
2952 !nla_get_u16(a[OVS_CHECK_PKT_LEN_ATTR_PKT_LEN]))
2955 acts_if_lesser_eq = a[OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL];
2956 acts_if_greater = a[OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER];
2958 /* Both the nested action should be present. */
2959 if (!acts_if_greater || !acts_if_lesser_eq)
2962 /* validation done, copy the nested actions. */
2963 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_CHECK_PKT_LEN,
2968 arg.pkt_len = nla_get_u16(a[OVS_CHECK_PKT_LEN_ATTR_PKT_LEN]);
2969 arg.exec_for_lesser_equal =
2970 last || !actions_may_change_flow(acts_if_lesser_eq);
2971 arg.exec_for_greater =
2972 last || !actions_may_change_flow(acts_if_greater);
2974 err = ovs_nla_add_action(sfa, OVS_CHECK_PKT_LEN_ATTR_ARG, &arg,
2979 nested_acts_start = add_nested_action_start(sfa,
2980 OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL, log);
2981 if (nested_acts_start < 0)
2982 return nested_acts_start;
2984 err = __ovs_nla_copy_actions(net, acts_if_lesser_eq, key, sfa,
2985 eth_type, vlan_tci, log);
2990 add_nested_action_end(*sfa, nested_acts_start);
2992 nested_acts_start = add_nested_action_start(sfa,
2993 OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER, log);
2994 if (nested_acts_start < 0)
2995 return nested_acts_start;
2997 err = __ovs_nla_copy_actions(net, acts_if_greater, key, sfa,
2998 eth_type, vlan_tci, log);
3003 add_nested_action_end(*sfa, nested_acts_start);
3004 add_nested_action_end(*sfa, start);
3008 static int copy_action(const struct nlattr *from,
3009 struct sw_flow_actions **sfa, bool log)
3011 int totlen = NLA_ALIGN(from->nla_len);
3014 to = reserve_sfa_size(sfa, from->nla_len, log);
3018 memcpy(to, from, totlen);
3022 static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
3023 const struct sw_flow_key *key,
3024 struct sw_flow_actions **sfa,
3025 __be16 eth_type, __be16 vlan_tci, bool log)
3027 u8 mac_proto = ovs_key_mac_proto(key);
3028 const struct nlattr *a;
3031 nla_for_each_nested(a, attr, rem) {
3032 /* Expected argument lengths, (u32)-1 for variable length. */
3033 static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {
3034 [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32),
3035 [OVS_ACTION_ATTR_RECIRC] = sizeof(u32),
3036 [OVS_ACTION_ATTR_USERSPACE] = (u32)-1,
3037 [OVS_ACTION_ATTR_PUSH_MPLS] = sizeof(struct ovs_action_push_mpls),
3038 [OVS_ACTION_ATTR_POP_MPLS] = sizeof(__be16),
3039 [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan),
3040 [OVS_ACTION_ATTR_POP_VLAN] = 0,
3041 [OVS_ACTION_ATTR_SET] = (u32)-1,
3042 [OVS_ACTION_ATTR_SET_MASKED] = (u32)-1,
3043 [OVS_ACTION_ATTR_SAMPLE] = (u32)-1,
3044 [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash),
3045 [OVS_ACTION_ATTR_CT] = (u32)-1,
3046 [OVS_ACTION_ATTR_CT_CLEAR] = 0,
3047 [OVS_ACTION_ATTR_TRUNC] = sizeof(struct ovs_action_trunc),
3048 [OVS_ACTION_ATTR_PUSH_ETH] = sizeof(struct ovs_action_push_eth),
3049 [OVS_ACTION_ATTR_POP_ETH] = 0,
3050 [OVS_ACTION_ATTR_PUSH_NSH] = (u32)-1,
3051 [OVS_ACTION_ATTR_POP_NSH] = 0,
3052 [OVS_ACTION_ATTR_METER] = sizeof(u32),
3053 [OVS_ACTION_ATTR_CLONE] = (u32)-1,
3054 [OVS_ACTION_ATTR_CHECK_PKT_LEN] = (u32)-1,
3056 const struct ovs_action_push_vlan *vlan;
3057 int type = nla_type(a);
3060 if (type > OVS_ACTION_ATTR_MAX ||
3061 (action_lens[type] != nla_len(a) &&
3062 action_lens[type] != (u32)-1))
3067 case OVS_ACTION_ATTR_UNSPEC:
3070 case OVS_ACTION_ATTR_USERSPACE:
3071 err = validate_userspace(a);
3076 case OVS_ACTION_ATTR_OUTPUT:
3077 if (nla_get_u32(a) >= DP_MAX_PORTS)
3081 case OVS_ACTION_ATTR_TRUNC: {
3082 const struct ovs_action_trunc *trunc = nla_data(a);
3084 if (trunc->max_len < ETH_HLEN)
3089 case OVS_ACTION_ATTR_HASH: {
3090 const struct ovs_action_hash *act_hash = nla_data(a);
3092 switch (act_hash->hash_alg) {
3093 case OVS_HASH_ALG_L4:
3102 case OVS_ACTION_ATTR_POP_VLAN:
3103 if (mac_proto != MAC_PROTO_ETHERNET)
3105 vlan_tci = htons(0);
3108 case OVS_ACTION_ATTR_PUSH_VLAN:
3109 if (mac_proto != MAC_PROTO_ETHERNET)
3112 if (!eth_type_vlan(vlan->vlan_tpid))
3114 if (!(vlan->vlan_tci & htons(VLAN_CFI_MASK)))
3116 vlan_tci = vlan->vlan_tci;
3119 case OVS_ACTION_ATTR_RECIRC:
3122 case OVS_ACTION_ATTR_PUSH_MPLS: {
3123 const struct ovs_action_push_mpls *mpls = nla_data(a);
3125 if (!eth_p_mpls(mpls->mpls_ethertype))
3127 /* Prohibit push MPLS other than to a white list
3128 * for packets that have a known tag order.
3130 if (vlan_tci & htons(VLAN_CFI_MASK) ||
3131 (eth_type != htons(ETH_P_IP) &&
3132 eth_type != htons(ETH_P_IPV6) &&
3133 eth_type != htons(ETH_P_ARP) &&
3134 eth_type != htons(ETH_P_RARP) &&
3135 !eth_p_mpls(eth_type)))
3137 eth_type = mpls->mpls_ethertype;
3141 case OVS_ACTION_ATTR_POP_MPLS:
3142 if (vlan_tci & htons(VLAN_CFI_MASK) ||
3143 !eth_p_mpls(eth_type))
3146 /* Disallow subsequent L2.5+ set and mpls_pop actions
3147 * as there is no check here to ensure that the new
3148 * eth_type is valid and thus set actions could
3149 * write off the end of the packet or otherwise
3152 * Support for these actions is planned using packet
3155 eth_type = htons(0);
3158 case OVS_ACTION_ATTR_SET:
3159 err = validate_set(a, key, sfa,
3160 &skip_copy, mac_proto, eth_type,
3166 case OVS_ACTION_ATTR_SET_MASKED:
3167 err = validate_set(a, key, sfa,
3168 &skip_copy, mac_proto, eth_type,
3174 case OVS_ACTION_ATTR_SAMPLE: {
3175 bool last = nla_is_last(a, rem);
3177 err = validate_and_copy_sample(net, a, key, sfa,
3186 case OVS_ACTION_ATTR_CT:
3187 err = ovs_ct_copy_action(net, a, key, sfa, log);
3193 case OVS_ACTION_ATTR_CT_CLEAR:
3196 case OVS_ACTION_ATTR_PUSH_ETH:
3197 /* Disallow pushing an Ethernet header if one
3198 * is already present */
3199 if (mac_proto != MAC_PROTO_NONE)
3201 mac_proto = MAC_PROTO_ETHERNET;
3204 case OVS_ACTION_ATTR_POP_ETH:
3205 if (mac_proto != MAC_PROTO_ETHERNET)
3207 if (vlan_tci & htons(VLAN_CFI_MASK))
3209 mac_proto = MAC_PROTO_NONE;
3212 case OVS_ACTION_ATTR_PUSH_NSH:
3213 if (mac_proto != MAC_PROTO_ETHERNET) {
3216 next_proto = tun_p_from_eth_p(eth_type);
3220 mac_proto = MAC_PROTO_NONE;
3221 if (!validate_nsh(nla_data(a), false, true, true))
3225 case OVS_ACTION_ATTR_POP_NSH: {
3228 if (eth_type != htons(ETH_P_NSH))
3230 inner_proto = tun_p_to_eth_p(key->nsh.base.np);
3233 if (key->nsh.base.np == TUN_P_ETHERNET)
3234 mac_proto = MAC_PROTO_ETHERNET;
3236 mac_proto = MAC_PROTO_NONE;
3240 case OVS_ACTION_ATTR_METER:
3241 /* Non-existent meters are simply ignored. */
3244 case OVS_ACTION_ATTR_CLONE: {
3245 bool last = nla_is_last(a, rem);
3247 err = validate_and_copy_clone(net, a, key, sfa,
3256 case OVS_ACTION_ATTR_CHECK_PKT_LEN: {
3257 bool last = nla_is_last(a, rem);
3259 err = validate_and_copy_check_pkt_len(net, a, key, sfa,
3270 OVS_NLERR(log, "Unknown Action type %d", type);
3274 err = copy_action(a, sfa, log);
3286 /* 'key' must be the masked key. */
3287 int ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
3288 const struct sw_flow_key *key,
3289 struct sw_flow_actions **sfa, bool log)
3293 *sfa = nla_alloc_flow_actions(min(nla_len(attr), MAX_ACTIONS_BUFSIZE));
3295 return PTR_ERR(*sfa);
3297 (*sfa)->orig_len = nla_len(attr);
3298 err = __ovs_nla_copy_actions(net, attr, key, sfa, key->eth.type,
3299 key->eth.vlan.tci, log);
3301 ovs_nla_free_flow_actions(*sfa);
3306 static int sample_action_to_attr(const struct nlattr *attr,
3307 struct sk_buff *skb)
3309 struct nlattr *start, *ac_start = NULL, *sample_arg;
3310 int err = 0, rem = nla_len(attr);
3311 const struct sample_arg *arg;
3312 struct nlattr *actions;
3314 start = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_SAMPLE);
3318 sample_arg = nla_data(attr);
3319 arg = nla_data(sample_arg);
3320 actions = nla_next(sample_arg, &rem);
3322 if (nla_put_u32(skb, OVS_SAMPLE_ATTR_PROBABILITY, arg->probability)) {
3327 ac_start = nla_nest_start_noflag(skb, OVS_SAMPLE_ATTR_ACTIONS);
3333 err = ovs_nla_put_actions(actions, rem, skb);
3337 nla_nest_cancel(skb, ac_start);
3338 nla_nest_cancel(skb, start);
3340 nla_nest_end(skb, ac_start);
3341 nla_nest_end(skb, start);
3347 static int clone_action_to_attr(const struct nlattr *attr,
3348 struct sk_buff *skb)
3350 struct nlattr *start;
3351 int err = 0, rem = nla_len(attr);
3353 start = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_CLONE);
3357 /* Skipping the OVS_CLONE_ATTR_EXEC that is always the first attribute. */
3358 attr = nla_next(nla_data(attr), &rem);
3359 err = ovs_nla_put_actions(attr, rem, skb);
3362 nla_nest_cancel(skb, start);
3364 nla_nest_end(skb, start);
3369 static int check_pkt_len_action_to_attr(const struct nlattr *attr,
3370 struct sk_buff *skb)
3372 struct nlattr *start, *ac_start = NULL;
3373 const struct check_pkt_len_arg *arg;
3374 const struct nlattr *a, *cpl_arg;
3375 int err = 0, rem = nla_len(attr);
3377 start = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_CHECK_PKT_LEN);
3381 /* The first nested attribute in 'attr' is always
3382 * 'OVS_CHECK_PKT_LEN_ATTR_ARG'.
3384 cpl_arg = nla_data(attr);
3385 arg = nla_data(cpl_arg);
3387 if (nla_put_u16(skb, OVS_CHECK_PKT_LEN_ATTR_PKT_LEN, arg->pkt_len)) {
3392 /* Second nested attribute in 'attr' is always
3393 * 'OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL'.
3395 a = nla_next(cpl_arg, &rem);
3396 ac_start = nla_nest_start_noflag(skb,
3397 OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL);
3403 err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb);
3405 nla_nest_cancel(skb, ac_start);
3408 nla_nest_end(skb, ac_start);
3411 /* Third nested attribute in 'attr' is always
3412 * OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER.
3414 a = nla_next(a, &rem);
3415 ac_start = nla_nest_start_noflag(skb,
3416 OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER);
3422 err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb);
3424 nla_nest_cancel(skb, ac_start);
3427 nla_nest_end(skb, ac_start);
3430 nla_nest_end(skb, start);
3434 nla_nest_cancel(skb, start);
3438 static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb)
3440 const struct nlattr *ovs_key = nla_data(a);
3441 int key_type = nla_type(ovs_key);
3442 struct nlattr *start;
3446 case OVS_KEY_ATTR_TUNNEL_INFO: {
3447 struct ovs_tunnel_info *ovs_tun = nla_data(ovs_key);
3448 struct ip_tunnel_info *tun_info = &ovs_tun->tun_dst->u.tun_info;
3450 start = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_SET);
3454 err = ip_tun_to_nlattr(skb, &tun_info->key,
3455 ip_tunnel_info_opts(tun_info),
3456 tun_info->options_len,
3457 ip_tunnel_info_af(tun_info), tun_info->mode);
3460 nla_nest_end(skb, start);
3464 if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key))
3472 static int masked_set_action_to_set_action_attr(const struct nlattr *a,
3473 struct sk_buff *skb)
3475 const struct nlattr *ovs_key = nla_data(a);
3477 size_t key_len = nla_len(ovs_key) / 2;
3479 /* Revert the conversion we did from a non-masked set action to
3480 * masked set action.
3482 nla = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_SET);
3486 if (nla_put(skb, nla_type(ovs_key), key_len, nla_data(ovs_key)))
3489 nla_nest_end(skb, nla);
3493 int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb)
3495 const struct nlattr *a;
3498 nla_for_each_attr(a, attr, len, rem) {
3499 int type = nla_type(a);
3502 case OVS_ACTION_ATTR_SET:
3503 err = set_action_to_attr(a, skb);
3508 case OVS_ACTION_ATTR_SET_TO_MASKED:
3509 err = masked_set_action_to_set_action_attr(a, skb);
3514 case OVS_ACTION_ATTR_SAMPLE:
3515 err = sample_action_to_attr(a, skb);
3520 case OVS_ACTION_ATTR_CT:
3521 err = ovs_ct_action_to_attr(nla_data(a), skb);
3526 case OVS_ACTION_ATTR_CLONE:
3527 err = clone_action_to_attr(a, skb);
3532 case OVS_ACTION_ATTR_CHECK_PKT_LEN:
3533 err = check_pkt_len_action_to_attr(a, skb);
3539 if (nla_put(skb, type, nla_len(a), nla_data(a)))