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:
82 case OVS_ACTION_ATTR_ADD_MPLS:
90 static void update_range(struct sw_flow_match *match,
91 size_t offset, size_t size, bool is_mask)
93 struct sw_flow_key_range *range;
94 size_t start = rounddown(offset, sizeof(long));
95 size_t end = roundup(offset + size, sizeof(long));
98 range = &match->range;
100 range = &match->mask->range;
102 if (range->start == range->end) {
103 range->start = start;
108 if (range->start > start)
109 range->start = start;
111 if (range->end < end)
115 #define SW_FLOW_KEY_PUT(match, field, value, is_mask) \
117 update_range(match, offsetof(struct sw_flow_key, field), \
118 sizeof((match)->key->field), is_mask); \
120 (match)->mask->key.field = value; \
122 (match)->key->field = value; \
125 #define SW_FLOW_KEY_MEMCPY_OFFSET(match, offset, value_p, len, is_mask) \
127 update_range(match, offset, len, is_mask); \
129 memcpy((u8 *)&(match)->mask->key + offset, value_p, \
132 memcpy((u8 *)(match)->key + offset, value_p, len); \
135 #define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \
136 SW_FLOW_KEY_MEMCPY_OFFSET(match, offsetof(struct sw_flow_key, field), \
137 value_p, len, is_mask)
139 #define SW_FLOW_KEY_MEMSET_FIELD(match, field, value, is_mask) \
141 update_range(match, offsetof(struct sw_flow_key, field), \
142 sizeof((match)->key->field), is_mask); \
144 memset((u8 *)&(match)->mask->key.field, value, \
145 sizeof((match)->mask->key.field)); \
147 memset((u8 *)&(match)->key->field, value, \
148 sizeof((match)->key->field)); \
151 static bool match_validate(const struct sw_flow_match *match,
152 u64 key_attrs, u64 mask_attrs, bool log)
154 u64 key_expected = 0;
155 u64 mask_allowed = key_attrs; /* At most allow all key attributes */
157 /* The following mask attributes allowed only if they
158 * pass the validation tests. */
159 mask_allowed &= ~((1 << OVS_KEY_ATTR_IPV4)
160 | (1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4)
161 | (1 << OVS_KEY_ATTR_IPV6)
162 | (1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6)
163 | (1 << OVS_KEY_ATTR_TCP)
164 | (1 << OVS_KEY_ATTR_TCP_FLAGS)
165 | (1 << OVS_KEY_ATTR_UDP)
166 | (1 << OVS_KEY_ATTR_SCTP)
167 | (1 << OVS_KEY_ATTR_ICMP)
168 | (1 << OVS_KEY_ATTR_ICMPV6)
169 | (1 << OVS_KEY_ATTR_ARP)
170 | (1 << OVS_KEY_ATTR_ND)
171 | (1 << OVS_KEY_ATTR_MPLS)
172 | (1 << OVS_KEY_ATTR_NSH));
174 /* Always allowed mask fields. */
175 mask_allowed |= ((1 << OVS_KEY_ATTR_TUNNEL)
176 | (1 << OVS_KEY_ATTR_IN_PORT)
177 | (1 << OVS_KEY_ATTR_ETHERTYPE));
179 /* Check key attributes. */
180 if (match->key->eth.type == htons(ETH_P_ARP)
181 || match->key->eth.type == htons(ETH_P_RARP)) {
182 key_expected |= 1 << OVS_KEY_ATTR_ARP;
183 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
184 mask_allowed |= 1 << OVS_KEY_ATTR_ARP;
187 if (eth_p_mpls(match->key->eth.type)) {
188 key_expected |= 1 << OVS_KEY_ATTR_MPLS;
189 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
190 mask_allowed |= 1 << OVS_KEY_ATTR_MPLS;
193 if (match->key->eth.type == htons(ETH_P_IP)) {
194 key_expected |= 1 << OVS_KEY_ATTR_IPV4;
195 if (match->mask && match->mask->key.eth.type == htons(0xffff)) {
196 mask_allowed |= 1 << OVS_KEY_ATTR_IPV4;
197 mask_allowed |= 1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4;
200 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
201 if (match->key->ip.proto == IPPROTO_UDP) {
202 key_expected |= 1 << OVS_KEY_ATTR_UDP;
203 if (match->mask && (match->mask->key.ip.proto == 0xff))
204 mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
207 if (match->key->ip.proto == IPPROTO_SCTP) {
208 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
209 if (match->mask && (match->mask->key.ip.proto == 0xff))
210 mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
213 if (match->key->ip.proto == IPPROTO_TCP) {
214 key_expected |= 1 << OVS_KEY_ATTR_TCP;
215 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
216 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
217 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
218 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
222 if (match->key->ip.proto == IPPROTO_ICMP) {
223 key_expected |= 1 << OVS_KEY_ATTR_ICMP;
224 if (match->mask && (match->mask->key.ip.proto == 0xff))
225 mask_allowed |= 1 << OVS_KEY_ATTR_ICMP;
230 if (match->key->eth.type == htons(ETH_P_IPV6)) {
231 key_expected |= 1 << OVS_KEY_ATTR_IPV6;
232 if (match->mask && match->mask->key.eth.type == htons(0xffff)) {
233 mask_allowed |= 1 << OVS_KEY_ATTR_IPV6;
234 mask_allowed |= 1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6;
237 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
238 if (match->key->ip.proto == IPPROTO_UDP) {
239 key_expected |= 1 << OVS_KEY_ATTR_UDP;
240 if (match->mask && (match->mask->key.ip.proto == 0xff))
241 mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
244 if (match->key->ip.proto == IPPROTO_SCTP) {
245 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
246 if (match->mask && (match->mask->key.ip.proto == 0xff))
247 mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
250 if (match->key->ip.proto == IPPROTO_TCP) {
251 key_expected |= 1 << OVS_KEY_ATTR_TCP;
252 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
253 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
254 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
255 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
259 if (match->key->ip.proto == IPPROTO_ICMPV6) {
260 key_expected |= 1 << OVS_KEY_ATTR_ICMPV6;
261 if (match->mask && (match->mask->key.ip.proto == 0xff))
262 mask_allowed |= 1 << OVS_KEY_ATTR_ICMPV6;
264 if (match->key->tp.src ==
265 htons(NDISC_NEIGHBOUR_SOLICITATION) ||
266 match->key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) {
267 key_expected |= 1 << OVS_KEY_ATTR_ND;
268 /* Original direction conntrack tuple
269 * uses the same space as the ND fields
270 * in the key, so both are not allowed
273 mask_allowed &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6);
274 if (match->mask && (match->mask->key.tp.src == htons(0xff)))
275 mask_allowed |= 1 << OVS_KEY_ATTR_ND;
281 if (match->key->eth.type == htons(ETH_P_NSH)) {
282 key_expected |= 1 << OVS_KEY_ATTR_NSH;
284 match->mask->key.eth.type == htons(0xffff)) {
285 mask_allowed |= 1 << OVS_KEY_ATTR_NSH;
289 if ((key_attrs & key_expected) != key_expected) {
290 /* Key attributes check failed. */
291 OVS_NLERR(log, "Missing key (keys=%llx, expected=%llx)",
292 (unsigned long long)key_attrs,
293 (unsigned long long)key_expected);
297 if ((mask_attrs & mask_allowed) != mask_attrs) {
298 /* Mask attributes check failed. */
299 OVS_NLERR(log, "Unexpected mask (mask=%llx, allowed=%llx)",
300 (unsigned long long)mask_attrs,
301 (unsigned long long)mask_allowed);
308 size_t ovs_tun_key_attr_size(void)
310 /* Whenever adding new OVS_TUNNEL_KEY_ FIELDS, we should consider
311 * updating this function.
313 return nla_total_size_64bit(8) /* OVS_TUNNEL_KEY_ATTR_ID */
314 + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_SRC */
315 + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_DST */
316 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */
317 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */
318 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */
319 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */
320 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_OAM */
321 + nla_total_size(256) /* OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS */
322 /* OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS and
323 * OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS is mutually exclusive with
324 * OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS and covered by it.
326 + nla_total_size(2) /* OVS_TUNNEL_KEY_ATTR_TP_SRC */
327 + nla_total_size(2); /* OVS_TUNNEL_KEY_ATTR_TP_DST */
330 static size_t ovs_nsh_key_attr_size(void)
332 /* Whenever adding new OVS_NSH_KEY_ FIELDS, we should consider
333 * updating this function.
335 return nla_total_size(NSH_BASE_HDR_LEN) /* OVS_NSH_KEY_ATTR_BASE */
336 /* OVS_NSH_KEY_ATTR_MD1 and OVS_NSH_KEY_ATTR_MD2 are
337 * mutually exclusive, so the bigger one can cover
340 + nla_total_size(NSH_CTX_HDRS_MAX_LEN);
343 size_t ovs_key_attr_size(void)
345 /* Whenever adding new OVS_KEY_ FIELDS, we should consider
346 * updating this function.
348 BUILD_BUG_ON(OVS_KEY_ATTR_TUNNEL_INFO != 29);
350 return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */
351 + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */
352 + ovs_tun_key_attr_size()
353 + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */
354 + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */
355 + nla_total_size(4) /* OVS_KEY_ATTR_DP_HASH */
356 + nla_total_size(4) /* OVS_KEY_ATTR_RECIRC_ID */
357 + nla_total_size(4) /* OVS_KEY_ATTR_CT_STATE */
358 + nla_total_size(2) /* OVS_KEY_ATTR_CT_ZONE */
359 + nla_total_size(4) /* OVS_KEY_ATTR_CT_MARK */
360 + nla_total_size(16) /* OVS_KEY_ATTR_CT_LABELS */
361 + nla_total_size(40) /* OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6 */
362 + nla_total_size(0) /* OVS_KEY_ATTR_NSH */
363 + ovs_nsh_key_attr_size()
364 + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */
365 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
366 + nla_total_size(4) /* OVS_KEY_ATTR_VLAN */
367 + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */
368 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
369 + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */
370 + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */
371 + nla_total_size(28); /* OVS_KEY_ATTR_ND */
374 static const struct ovs_len_tbl ovs_vxlan_ext_key_lens[OVS_VXLAN_EXT_MAX + 1] = {
375 [OVS_VXLAN_EXT_GBP] = { .len = sizeof(u32) },
378 static const struct ovs_len_tbl ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = {
379 [OVS_TUNNEL_KEY_ATTR_ID] = { .len = sizeof(u64) },
380 [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = { .len = sizeof(u32) },
381 [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = { .len = sizeof(u32) },
382 [OVS_TUNNEL_KEY_ATTR_TOS] = { .len = 1 },
383 [OVS_TUNNEL_KEY_ATTR_TTL] = { .len = 1 },
384 [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = { .len = 0 },
385 [OVS_TUNNEL_KEY_ATTR_CSUM] = { .len = 0 },
386 [OVS_TUNNEL_KEY_ATTR_TP_SRC] = { .len = sizeof(u16) },
387 [OVS_TUNNEL_KEY_ATTR_TP_DST] = { .len = sizeof(u16) },
388 [OVS_TUNNEL_KEY_ATTR_OAM] = { .len = 0 },
389 [OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS] = { .len = OVS_ATTR_VARIABLE },
390 [OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS] = { .len = OVS_ATTR_NESTED,
391 .next = ovs_vxlan_ext_key_lens },
392 [OVS_TUNNEL_KEY_ATTR_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
393 [OVS_TUNNEL_KEY_ATTR_IPV6_DST] = { .len = sizeof(struct in6_addr) },
394 [OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS] = { .len = OVS_ATTR_VARIABLE },
395 [OVS_TUNNEL_KEY_ATTR_IPV4_INFO_BRIDGE] = { .len = 0 },
398 static const struct ovs_len_tbl
399 ovs_nsh_key_attr_lens[OVS_NSH_KEY_ATTR_MAX + 1] = {
400 [OVS_NSH_KEY_ATTR_BASE] = { .len = sizeof(struct ovs_nsh_key_base) },
401 [OVS_NSH_KEY_ATTR_MD1] = { .len = sizeof(struct ovs_nsh_key_md1) },
402 [OVS_NSH_KEY_ATTR_MD2] = { .len = OVS_ATTR_VARIABLE },
405 /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */
406 static const struct ovs_len_tbl ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = {
407 [OVS_KEY_ATTR_ENCAP] = { .len = OVS_ATTR_NESTED },
408 [OVS_KEY_ATTR_PRIORITY] = { .len = sizeof(u32) },
409 [OVS_KEY_ATTR_IN_PORT] = { .len = sizeof(u32) },
410 [OVS_KEY_ATTR_SKB_MARK] = { .len = sizeof(u32) },
411 [OVS_KEY_ATTR_ETHERNET] = { .len = sizeof(struct ovs_key_ethernet) },
412 [OVS_KEY_ATTR_VLAN] = { .len = sizeof(__be16) },
413 [OVS_KEY_ATTR_ETHERTYPE] = { .len = sizeof(__be16) },
414 [OVS_KEY_ATTR_IPV4] = { .len = sizeof(struct ovs_key_ipv4) },
415 [OVS_KEY_ATTR_IPV6] = { .len = sizeof(struct ovs_key_ipv6) },
416 [OVS_KEY_ATTR_TCP] = { .len = sizeof(struct ovs_key_tcp) },
417 [OVS_KEY_ATTR_TCP_FLAGS] = { .len = sizeof(__be16) },
418 [OVS_KEY_ATTR_UDP] = { .len = sizeof(struct ovs_key_udp) },
419 [OVS_KEY_ATTR_SCTP] = { .len = sizeof(struct ovs_key_sctp) },
420 [OVS_KEY_ATTR_ICMP] = { .len = sizeof(struct ovs_key_icmp) },
421 [OVS_KEY_ATTR_ICMPV6] = { .len = sizeof(struct ovs_key_icmpv6) },
422 [OVS_KEY_ATTR_ARP] = { .len = sizeof(struct ovs_key_arp) },
423 [OVS_KEY_ATTR_ND] = { .len = sizeof(struct ovs_key_nd) },
424 [OVS_KEY_ATTR_RECIRC_ID] = { .len = sizeof(u32) },
425 [OVS_KEY_ATTR_DP_HASH] = { .len = sizeof(u32) },
426 [OVS_KEY_ATTR_TUNNEL] = { .len = OVS_ATTR_NESTED,
427 .next = ovs_tunnel_key_lens, },
428 [OVS_KEY_ATTR_MPLS] = { .len = OVS_ATTR_VARIABLE },
429 [OVS_KEY_ATTR_CT_STATE] = { .len = sizeof(u32) },
430 [OVS_KEY_ATTR_CT_ZONE] = { .len = sizeof(u16) },
431 [OVS_KEY_ATTR_CT_MARK] = { .len = sizeof(u32) },
432 [OVS_KEY_ATTR_CT_LABELS] = { .len = sizeof(struct ovs_key_ct_labels) },
433 [OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4] = {
434 .len = sizeof(struct ovs_key_ct_tuple_ipv4) },
435 [OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6] = {
436 .len = sizeof(struct ovs_key_ct_tuple_ipv6) },
437 [OVS_KEY_ATTR_NSH] = { .len = OVS_ATTR_NESTED,
438 .next = ovs_nsh_key_attr_lens, },
441 static bool check_attr_len(unsigned int attr_len, unsigned int expected_len)
443 return expected_len == attr_len ||
444 expected_len == OVS_ATTR_NESTED ||
445 expected_len == OVS_ATTR_VARIABLE;
448 static bool is_all_zero(const u8 *fp, size_t size)
455 for (i = 0; i < size; i++)
462 static int __parse_flow_nlattrs(const struct nlattr *attr,
463 const struct nlattr *a[],
464 u64 *attrsp, bool log, bool nz)
466 const struct nlattr *nla;
471 nla_for_each_nested(nla, attr, rem) {
472 u16 type = nla_type(nla);
475 if (type > OVS_KEY_ATTR_MAX) {
476 OVS_NLERR(log, "Key type %d is out of range max %d",
477 type, OVS_KEY_ATTR_MAX);
481 if (attrs & (1 << type)) {
482 OVS_NLERR(log, "Duplicate key (type %d).", type);
486 expected_len = ovs_key_lens[type].len;
487 if (!check_attr_len(nla_len(nla), expected_len)) {
488 OVS_NLERR(log, "Key %d has unexpected len %d expected %d",
489 type, nla_len(nla), expected_len);
493 if (!nz || !is_all_zero(nla_data(nla), nla_len(nla))) {
499 OVS_NLERR(log, "Message has %d unknown bytes.", rem);
507 static int parse_flow_mask_nlattrs(const struct nlattr *attr,
508 const struct nlattr *a[], u64 *attrsp,
511 return __parse_flow_nlattrs(attr, a, attrsp, log, true);
514 int parse_flow_nlattrs(const struct nlattr *attr, const struct nlattr *a[],
515 u64 *attrsp, bool log)
517 return __parse_flow_nlattrs(attr, a, attrsp, log, false);
520 static int genev_tun_opt_from_nlattr(const struct nlattr *a,
521 struct sw_flow_match *match, bool is_mask,
524 unsigned long opt_key_offset;
526 if (nla_len(a) > sizeof(match->key->tun_opts)) {
527 OVS_NLERR(log, "Geneve option length err (len %d, max %zu).",
528 nla_len(a), sizeof(match->key->tun_opts));
532 if (nla_len(a) % 4 != 0) {
533 OVS_NLERR(log, "Geneve opt len %d is not a multiple of 4.",
538 /* We need to record the length of the options passed
539 * down, otherwise packets with the same format but
540 * additional options will be silently matched.
543 SW_FLOW_KEY_PUT(match, tun_opts_len, nla_len(a),
546 /* This is somewhat unusual because it looks at
547 * both the key and mask while parsing the
548 * attributes (and by extension assumes the key
549 * is parsed first). Normally, we would verify
550 * that each is the correct length and that the
551 * attributes line up in the validate function.
552 * However, that is difficult because this is
553 * variable length and we won't have the
556 if (match->key->tun_opts_len != nla_len(a)) {
557 OVS_NLERR(log, "Geneve option len %d != mask len %d",
558 match->key->tun_opts_len, nla_len(a));
562 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
565 opt_key_offset = TUN_METADATA_OFFSET(nla_len(a));
566 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, nla_data(a),
567 nla_len(a), is_mask);
571 static int vxlan_tun_opt_from_nlattr(const struct nlattr *attr,
572 struct sw_flow_match *match, bool is_mask,
577 unsigned long opt_key_offset;
578 struct vxlan_metadata opts;
580 BUILD_BUG_ON(sizeof(opts) > sizeof(match->key->tun_opts));
582 memset(&opts, 0, sizeof(opts));
583 nla_for_each_nested(a, attr, rem) {
584 int type = nla_type(a);
586 if (type > OVS_VXLAN_EXT_MAX) {
587 OVS_NLERR(log, "VXLAN extension %d out of range max %d",
588 type, OVS_VXLAN_EXT_MAX);
592 if (!check_attr_len(nla_len(a),
593 ovs_vxlan_ext_key_lens[type].len)) {
594 OVS_NLERR(log, "VXLAN extension %d has unexpected len %d expected %d",
596 ovs_vxlan_ext_key_lens[type].len);
601 case OVS_VXLAN_EXT_GBP:
602 opts.gbp = nla_get_u32(a);
605 OVS_NLERR(log, "Unknown VXLAN extension attribute %d",
611 OVS_NLERR(log, "VXLAN extension message has %d unknown bytes.",
617 SW_FLOW_KEY_PUT(match, tun_opts_len, sizeof(opts), false);
619 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
621 opt_key_offset = TUN_METADATA_OFFSET(sizeof(opts));
622 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, &opts, sizeof(opts),
627 static int erspan_tun_opt_from_nlattr(const struct nlattr *a,
628 struct sw_flow_match *match, bool is_mask,
631 unsigned long opt_key_offset;
633 BUILD_BUG_ON(sizeof(struct erspan_metadata) >
634 sizeof(match->key->tun_opts));
636 if (nla_len(a) > sizeof(match->key->tun_opts)) {
637 OVS_NLERR(log, "ERSPAN option length err (len %d, max %zu).",
638 nla_len(a), sizeof(match->key->tun_opts));
643 SW_FLOW_KEY_PUT(match, tun_opts_len,
644 sizeof(struct erspan_metadata), false);
646 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
648 opt_key_offset = TUN_METADATA_OFFSET(nla_len(a));
649 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, nla_data(a),
650 nla_len(a), is_mask);
654 static int ip_tun_from_nlattr(const struct nlattr *attr,
655 struct sw_flow_match *match, bool is_mask,
658 bool ttl = false, ipv4 = false, ipv6 = false;
659 bool info_bridge_mode = false;
660 __be16 tun_flags = 0;
665 nla_for_each_nested(a, attr, rem) {
666 int type = nla_type(a);
669 if (type > OVS_TUNNEL_KEY_ATTR_MAX) {
670 OVS_NLERR(log, "Tunnel attr %d out of range max %d",
671 type, OVS_TUNNEL_KEY_ATTR_MAX);
675 if (!check_attr_len(nla_len(a),
676 ovs_tunnel_key_lens[type].len)) {
677 OVS_NLERR(log, "Tunnel attr %d has unexpected len %d expected %d",
678 type, nla_len(a), ovs_tunnel_key_lens[type].len);
683 case OVS_TUNNEL_KEY_ATTR_ID:
684 SW_FLOW_KEY_PUT(match, tun_key.tun_id,
685 nla_get_be64(a), is_mask);
686 tun_flags |= TUNNEL_KEY;
688 case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
689 SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.src,
690 nla_get_in_addr(a), is_mask);
693 case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
694 SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.dst,
695 nla_get_in_addr(a), is_mask);
698 case OVS_TUNNEL_KEY_ATTR_IPV6_SRC:
699 SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.src,
700 nla_get_in6_addr(a), is_mask);
703 case OVS_TUNNEL_KEY_ATTR_IPV6_DST:
704 SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.dst,
705 nla_get_in6_addr(a), is_mask);
708 case OVS_TUNNEL_KEY_ATTR_TOS:
709 SW_FLOW_KEY_PUT(match, tun_key.tos,
710 nla_get_u8(a), is_mask);
712 case OVS_TUNNEL_KEY_ATTR_TTL:
713 SW_FLOW_KEY_PUT(match, tun_key.ttl,
714 nla_get_u8(a), is_mask);
717 case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
718 tun_flags |= TUNNEL_DONT_FRAGMENT;
720 case OVS_TUNNEL_KEY_ATTR_CSUM:
721 tun_flags |= TUNNEL_CSUM;
723 case OVS_TUNNEL_KEY_ATTR_TP_SRC:
724 SW_FLOW_KEY_PUT(match, tun_key.tp_src,
725 nla_get_be16(a), is_mask);
727 case OVS_TUNNEL_KEY_ATTR_TP_DST:
728 SW_FLOW_KEY_PUT(match, tun_key.tp_dst,
729 nla_get_be16(a), is_mask);
731 case OVS_TUNNEL_KEY_ATTR_OAM:
732 tun_flags |= TUNNEL_OAM;
734 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
736 OVS_NLERR(log, "Multiple metadata blocks provided");
740 err = genev_tun_opt_from_nlattr(a, match, is_mask, log);
744 tun_flags |= TUNNEL_GENEVE_OPT;
747 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
749 OVS_NLERR(log, "Multiple metadata blocks provided");
753 err = vxlan_tun_opt_from_nlattr(a, match, is_mask, log);
757 tun_flags |= TUNNEL_VXLAN_OPT;
760 case OVS_TUNNEL_KEY_ATTR_PAD:
762 case OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS:
764 OVS_NLERR(log, "Multiple metadata blocks provided");
768 err = erspan_tun_opt_from_nlattr(a, match, is_mask,
773 tun_flags |= TUNNEL_ERSPAN_OPT;
776 case OVS_TUNNEL_KEY_ATTR_IPV4_INFO_BRIDGE:
777 info_bridge_mode = true;
781 OVS_NLERR(log, "Unknown IP tunnel attribute %d",
787 SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask);
789 SW_FLOW_KEY_MEMSET_FIELD(match, tun_proto, 0xff, true);
791 SW_FLOW_KEY_PUT(match, tun_proto, ipv6 ? AF_INET6 : AF_INET,
795 OVS_NLERR(log, "IP tunnel attribute has %d unknown bytes.",
801 OVS_NLERR(log, "Mixed IPv4 and IPv6 tunnel attributes");
806 if (!ipv4 && !ipv6) {
807 OVS_NLERR(log, "IP tunnel dst address not specified");
811 if (info_bridge_mode) {
812 if (match->key->tun_key.u.ipv4.src ||
813 match->key->tun_key.u.ipv4.dst ||
814 match->key->tun_key.tp_src ||
815 match->key->tun_key.tp_dst ||
816 match->key->tun_key.ttl ||
817 match->key->tun_key.tos ||
818 tun_flags & ~TUNNEL_KEY) {
819 OVS_NLERR(log, "IPv4 tun info is not correct");
822 } else if (!match->key->tun_key.u.ipv4.dst) {
823 OVS_NLERR(log, "IPv4 tunnel dst address is zero");
827 if (ipv6 && ipv6_addr_any(&match->key->tun_key.u.ipv6.dst)) {
828 OVS_NLERR(log, "IPv6 tunnel dst address is zero");
832 if (!ttl && !info_bridge_mode) {
833 OVS_NLERR(log, "IP tunnel TTL not specified.");
841 static int vxlan_opt_to_nlattr(struct sk_buff *skb,
842 const void *tun_opts, int swkey_tun_opts_len)
844 const struct vxlan_metadata *opts = tun_opts;
847 nla = nla_nest_start_noflag(skb, OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS);
851 if (nla_put_u32(skb, OVS_VXLAN_EXT_GBP, opts->gbp) < 0)
854 nla_nest_end(skb, nla);
858 static int __ip_tun_to_nlattr(struct sk_buff *skb,
859 const struct ip_tunnel_key *output,
860 const void *tun_opts, int swkey_tun_opts_len,
861 unsigned short tun_proto, u8 mode)
863 if (output->tun_flags & TUNNEL_KEY &&
864 nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id,
865 OVS_TUNNEL_KEY_ATTR_PAD))
868 if (mode & IP_TUNNEL_INFO_BRIDGE)
869 return nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_IPV4_INFO_BRIDGE)
874 if (output->u.ipv4.src &&
875 nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC,
878 if (output->u.ipv4.dst &&
879 nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST,
884 if (!ipv6_addr_any(&output->u.ipv6.src) &&
885 nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_SRC,
886 &output->u.ipv6.src))
888 if (!ipv6_addr_any(&output->u.ipv6.dst) &&
889 nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_DST,
890 &output->u.ipv6.dst))
895 nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->tos))
897 if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ttl))
899 if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) &&
900 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT))
902 if ((output->tun_flags & TUNNEL_CSUM) &&
903 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM))
905 if (output->tp_src &&
906 nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_SRC, output->tp_src))
908 if (output->tp_dst &&
909 nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_DST, output->tp_dst))
911 if ((output->tun_flags & TUNNEL_OAM) &&
912 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM))
914 if (swkey_tun_opts_len) {
915 if (output->tun_flags & TUNNEL_GENEVE_OPT &&
916 nla_put(skb, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS,
917 swkey_tun_opts_len, tun_opts))
919 else if (output->tun_flags & TUNNEL_VXLAN_OPT &&
920 vxlan_opt_to_nlattr(skb, tun_opts, swkey_tun_opts_len))
922 else if (output->tun_flags & TUNNEL_ERSPAN_OPT &&
923 nla_put(skb, OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS,
924 swkey_tun_opts_len, tun_opts))
931 static int ip_tun_to_nlattr(struct sk_buff *skb,
932 const struct ip_tunnel_key *output,
933 const void *tun_opts, int swkey_tun_opts_len,
934 unsigned short tun_proto, u8 mode)
939 nla = nla_nest_start_noflag(skb, OVS_KEY_ATTR_TUNNEL);
943 err = __ip_tun_to_nlattr(skb, output, tun_opts, swkey_tun_opts_len,
948 nla_nest_end(skb, nla);
952 int ovs_nla_put_tunnel_info(struct sk_buff *skb,
953 struct ip_tunnel_info *tun_info)
955 return __ip_tun_to_nlattr(skb, &tun_info->key,
956 ip_tunnel_info_opts(tun_info),
957 tun_info->options_len,
958 ip_tunnel_info_af(tun_info), tun_info->mode);
961 static int encode_vlan_from_nlattrs(struct sw_flow_match *match,
962 const struct nlattr *a[],
963 bool is_mask, bool inner)
968 if (a[OVS_KEY_ATTR_VLAN])
969 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
971 if (a[OVS_KEY_ATTR_ETHERTYPE])
972 tpid = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
974 if (likely(!inner)) {
975 SW_FLOW_KEY_PUT(match, eth.vlan.tpid, tpid, is_mask);
976 SW_FLOW_KEY_PUT(match, eth.vlan.tci, tci, is_mask);
978 SW_FLOW_KEY_PUT(match, eth.cvlan.tpid, tpid, is_mask);
979 SW_FLOW_KEY_PUT(match, eth.cvlan.tci, tci, is_mask);
984 static int validate_vlan_from_nlattrs(const struct sw_flow_match *match,
985 u64 key_attrs, bool inner,
986 const struct nlattr **a, bool log)
990 if (!((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) &&
991 (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) &&
992 eth_type_vlan(nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE])))) {
997 if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) &&
998 (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) {
999 OVS_NLERR(log, "Invalid %s frame", (inner) ? "C-VLAN" : "VLAN");
1003 if (a[OVS_KEY_ATTR_VLAN])
1004 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
1006 if (!(tci & htons(VLAN_CFI_MASK))) {
1008 OVS_NLERR(log, "%s TCI does not have VLAN_CFI_MASK bit set.",
1009 (inner) ? "C-VLAN" : "VLAN");
1011 } else if (nla_len(a[OVS_KEY_ATTR_ENCAP])) {
1012 /* Corner case for truncated VLAN header. */
1013 OVS_NLERR(log, "Truncated %s header has non-zero encap attribute.",
1014 (inner) ? "C-VLAN" : "VLAN");
1022 static int validate_vlan_mask_from_nlattrs(const struct sw_flow_match *match,
1023 u64 key_attrs, bool inner,
1024 const struct nlattr **a, bool log)
1028 bool encap_valid = !!(match->key->eth.vlan.tci &
1029 htons(VLAN_CFI_MASK));
1030 bool i_encap_valid = !!(match->key->eth.cvlan.tci &
1031 htons(VLAN_CFI_MASK));
1033 if (!(key_attrs & (1 << OVS_KEY_ATTR_ENCAP))) {
1038 if ((!inner && !encap_valid) || (inner && !i_encap_valid)) {
1039 OVS_NLERR(log, "Encap mask attribute is set for non-%s frame.",
1040 (inner) ? "C-VLAN" : "VLAN");
1044 if (a[OVS_KEY_ATTR_VLAN])
1045 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
1047 if (a[OVS_KEY_ATTR_ETHERTYPE])
1048 tpid = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
1050 if (tpid != htons(0xffff)) {
1051 OVS_NLERR(log, "Must have an exact match on %s TPID (mask=%x).",
1052 (inner) ? "C-VLAN" : "VLAN", ntohs(tpid));
1055 if (!(tci & htons(VLAN_CFI_MASK))) {
1056 OVS_NLERR(log, "%s TCI mask does not have exact match for VLAN_CFI_MASK bit.",
1057 (inner) ? "C-VLAN" : "VLAN");
1064 static int __parse_vlan_from_nlattrs(struct sw_flow_match *match,
1065 u64 *key_attrs, bool inner,
1066 const struct nlattr **a, bool is_mask,
1070 const struct nlattr *encap;
1073 err = validate_vlan_from_nlattrs(match, *key_attrs, inner,
1076 err = validate_vlan_mask_from_nlattrs(match, *key_attrs, inner,
1081 err = encode_vlan_from_nlattrs(match, a, is_mask, inner);
1085 *key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP);
1086 *key_attrs &= ~(1 << OVS_KEY_ATTR_VLAN);
1087 *key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
1089 encap = a[OVS_KEY_ATTR_ENCAP];
1092 err = parse_flow_nlattrs(encap, a, key_attrs, log);
1094 err = parse_flow_mask_nlattrs(encap, a, key_attrs, log);
1099 static int parse_vlan_from_nlattrs(struct sw_flow_match *match,
1100 u64 *key_attrs, const struct nlattr **a,
1101 bool is_mask, bool log)
1104 bool encap_valid = false;
1106 err = __parse_vlan_from_nlattrs(match, key_attrs, false, a,
1111 encap_valid = !!(match->key->eth.vlan.tci & htons(VLAN_CFI_MASK));
1113 err = __parse_vlan_from_nlattrs(match, key_attrs, true, a,
1122 static int parse_eth_type_from_nlattrs(struct sw_flow_match *match,
1123 u64 *attrs, const struct nlattr **a,
1124 bool is_mask, bool log)
1128 eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
1130 /* Always exact match EtherType. */
1131 eth_type = htons(0xffff);
1132 } else if (!eth_proto_is_802_3(eth_type)) {
1133 OVS_NLERR(log, "EtherType %x is less than min %x",
1134 ntohs(eth_type), ETH_P_802_3_MIN);
1138 SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask);
1139 *attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
1143 static int metadata_from_nlattrs(struct net *net, struct sw_flow_match *match,
1144 u64 *attrs, const struct nlattr **a,
1145 bool is_mask, bool log)
1147 u8 mac_proto = MAC_PROTO_ETHERNET;
1149 if (*attrs & (1 << OVS_KEY_ATTR_DP_HASH)) {
1150 u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]);
1152 SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask);
1153 *attrs &= ~(1 << OVS_KEY_ATTR_DP_HASH);
1156 if (*attrs & (1 << OVS_KEY_ATTR_RECIRC_ID)) {
1157 u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]);
1159 SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask);
1160 *attrs &= ~(1 << OVS_KEY_ATTR_RECIRC_ID);
1163 if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) {
1164 SW_FLOW_KEY_PUT(match, phy.priority,
1165 nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask);
1166 *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY);
1169 if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) {
1170 u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]);
1173 in_port = 0xffffffff; /* Always exact match in_port. */
1174 } else if (in_port >= DP_MAX_PORTS) {
1175 OVS_NLERR(log, "Port %d exceeds max allowable %d",
1176 in_port, DP_MAX_PORTS);
1180 SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask);
1181 *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT);
1182 } else if (!is_mask) {
1183 SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask);
1186 if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) {
1187 uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]);
1189 SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask);
1190 *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK);
1192 if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) {
1193 if (ip_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match,
1196 *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL);
1199 if (*attrs & (1 << OVS_KEY_ATTR_CT_STATE) &&
1200 ovs_ct_verify(net, OVS_KEY_ATTR_CT_STATE)) {
1201 u32 ct_state = nla_get_u32(a[OVS_KEY_ATTR_CT_STATE]);
1203 if (ct_state & ~CT_SUPPORTED_MASK) {
1204 OVS_NLERR(log, "ct_state flags %08x unsupported",
1209 SW_FLOW_KEY_PUT(match, ct_state, ct_state, is_mask);
1210 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_STATE);
1212 if (*attrs & (1 << OVS_KEY_ATTR_CT_ZONE) &&
1213 ovs_ct_verify(net, OVS_KEY_ATTR_CT_ZONE)) {
1214 u16 ct_zone = nla_get_u16(a[OVS_KEY_ATTR_CT_ZONE]);
1216 SW_FLOW_KEY_PUT(match, ct_zone, ct_zone, is_mask);
1217 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ZONE);
1219 if (*attrs & (1 << OVS_KEY_ATTR_CT_MARK) &&
1220 ovs_ct_verify(net, OVS_KEY_ATTR_CT_MARK)) {
1221 u32 mark = nla_get_u32(a[OVS_KEY_ATTR_CT_MARK]);
1223 SW_FLOW_KEY_PUT(match, ct.mark, mark, is_mask);
1224 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_MARK);
1226 if (*attrs & (1 << OVS_KEY_ATTR_CT_LABELS) &&
1227 ovs_ct_verify(net, OVS_KEY_ATTR_CT_LABELS)) {
1228 const struct ovs_key_ct_labels *cl;
1230 cl = nla_data(a[OVS_KEY_ATTR_CT_LABELS]);
1231 SW_FLOW_KEY_MEMCPY(match, ct.labels, cl->ct_labels,
1232 sizeof(*cl), is_mask);
1233 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_LABELS);
1235 if (*attrs & (1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4)) {
1236 const struct ovs_key_ct_tuple_ipv4 *ct;
1238 ct = nla_data(a[OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4]);
1240 SW_FLOW_KEY_PUT(match, ipv4.ct_orig.src, ct->ipv4_src, is_mask);
1241 SW_FLOW_KEY_PUT(match, ipv4.ct_orig.dst, ct->ipv4_dst, is_mask);
1242 SW_FLOW_KEY_PUT(match, ct.orig_tp.src, ct->src_port, is_mask);
1243 SW_FLOW_KEY_PUT(match, ct.orig_tp.dst, ct->dst_port, is_mask);
1244 SW_FLOW_KEY_PUT(match, ct_orig_proto, ct->ipv4_proto, is_mask);
1245 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4);
1247 if (*attrs & (1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6)) {
1248 const struct ovs_key_ct_tuple_ipv6 *ct;
1250 ct = nla_data(a[OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6]);
1252 SW_FLOW_KEY_MEMCPY(match, ipv6.ct_orig.src, &ct->ipv6_src,
1253 sizeof(match->key->ipv6.ct_orig.src),
1255 SW_FLOW_KEY_MEMCPY(match, ipv6.ct_orig.dst, &ct->ipv6_dst,
1256 sizeof(match->key->ipv6.ct_orig.dst),
1258 SW_FLOW_KEY_PUT(match, ct.orig_tp.src, ct->src_port, is_mask);
1259 SW_FLOW_KEY_PUT(match, ct.orig_tp.dst, ct->dst_port, is_mask);
1260 SW_FLOW_KEY_PUT(match, ct_orig_proto, ct->ipv6_proto, is_mask);
1261 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6);
1264 /* For layer 3 packets the Ethernet type is provided
1265 * and treated as metadata but no MAC addresses are provided.
1267 if (!(*attrs & (1ULL << OVS_KEY_ATTR_ETHERNET)) &&
1268 (*attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)))
1269 mac_proto = MAC_PROTO_NONE;
1271 /* Always exact match mac_proto */
1272 SW_FLOW_KEY_PUT(match, mac_proto, is_mask ? 0xff : mac_proto, is_mask);
1274 if (mac_proto == MAC_PROTO_NONE)
1275 return parse_eth_type_from_nlattrs(match, attrs, a, is_mask,
1281 int nsh_hdr_from_nlattr(const struct nlattr *attr,
1282 struct nshhdr *nh, size_t size)
1290 /* validate_nsh has check this, so we needn't do duplicate check here
1292 if (size < NSH_BASE_HDR_LEN)
1295 nla_for_each_nested(a, attr, rem) {
1296 int type = nla_type(a);
1299 case OVS_NSH_KEY_ATTR_BASE: {
1300 const struct ovs_nsh_key_base *base = nla_data(a);
1302 flags = base->flags;
1305 nh->mdtype = base->mdtype;
1306 nh->path_hdr = base->path_hdr;
1309 case OVS_NSH_KEY_ATTR_MD1:
1311 if (mdlen > size - NSH_BASE_HDR_LEN)
1313 memcpy(&nh->md1, nla_data(a), mdlen);
1316 case OVS_NSH_KEY_ATTR_MD2:
1318 if (mdlen > size - NSH_BASE_HDR_LEN)
1320 memcpy(&nh->md2, nla_data(a), mdlen);
1328 /* nsh header length = NSH_BASE_HDR_LEN + mdlen */
1329 nh->ver_flags_ttl_len = 0;
1330 nsh_set_flags_ttl_len(nh, flags, ttl, NSH_BASE_HDR_LEN + mdlen);
1335 int nsh_key_from_nlattr(const struct nlattr *attr,
1336 struct ovs_key_nsh *nsh, struct ovs_key_nsh *nsh_mask)
1341 /* validate_nsh has check this, so we needn't do duplicate check here
1343 nla_for_each_nested(a, attr, rem) {
1344 int type = nla_type(a);
1347 case OVS_NSH_KEY_ATTR_BASE: {
1348 const struct ovs_nsh_key_base *base = nla_data(a);
1349 const struct ovs_nsh_key_base *base_mask = base + 1;
1352 nsh_mask->base = *base_mask;
1355 case OVS_NSH_KEY_ATTR_MD1: {
1356 const struct ovs_nsh_key_md1 *md1 = nla_data(a);
1357 const struct ovs_nsh_key_md1 *md1_mask = md1 + 1;
1359 memcpy(nsh->context, md1->context, sizeof(*md1));
1360 memcpy(nsh_mask->context, md1_mask->context,
1364 case OVS_NSH_KEY_ATTR_MD2:
1365 /* Not supported yet */
1375 static int nsh_key_put_from_nlattr(const struct nlattr *attr,
1376 struct sw_flow_match *match, bool is_mask,
1377 bool is_push_nsh, bool log)
1381 bool has_base = false;
1382 bool has_md1 = false;
1383 bool has_md2 = false;
1387 if (WARN_ON(is_push_nsh && is_mask))
1390 nla_for_each_nested(a, attr, rem) {
1391 int type = nla_type(a);
1394 if (type > OVS_NSH_KEY_ATTR_MAX) {
1395 OVS_NLERR(log, "nsh attr %d is out of range max %d",
1396 type, OVS_NSH_KEY_ATTR_MAX);
1400 if (!check_attr_len(nla_len(a),
1401 ovs_nsh_key_attr_lens[type].len)) {
1404 "nsh attr %d has unexpected len %d expected %d",
1407 ovs_nsh_key_attr_lens[type].len
1413 case OVS_NSH_KEY_ATTR_BASE: {
1414 const struct ovs_nsh_key_base *base = nla_data(a);
1417 mdtype = base->mdtype;
1418 SW_FLOW_KEY_PUT(match, nsh.base.flags,
1419 base->flags, is_mask);
1420 SW_FLOW_KEY_PUT(match, nsh.base.ttl,
1421 base->ttl, is_mask);
1422 SW_FLOW_KEY_PUT(match, nsh.base.mdtype,
1423 base->mdtype, is_mask);
1424 SW_FLOW_KEY_PUT(match, nsh.base.np,
1426 SW_FLOW_KEY_PUT(match, nsh.base.path_hdr,
1427 base->path_hdr, is_mask);
1430 case OVS_NSH_KEY_ATTR_MD1: {
1431 const struct ovs_nsh_key_md1 *md1 = nla_data(a);
1434 for (i = 0; i < NSH_MD1_CONTEXT_SIZE; i++)
1435 SW_FLOW_KEY_PUT(match, nsh.context[i],
1436 md1->context[i], is_mask);
1439 case OVS_NSH_KEY_ATTR_MD2:
1440 if (!is_push_nsh) /* Not supported MD type 2 yet */
1445 if (mdlen > NSH_CTX_HDRS_MAX_LEN || mdlen <= 0) {
1448 "Invalid MD length %d for MD type %d",
1456 OVS_NLERR(log, "Unknown nsh attribute %d",
1463 OVS_NLERR(log, "nsh attribute has %d unknown bytes.", rem);
1467 if (has_md1 && has_md2) {
1470 "invalid nsh attribute: md1 and md2 are exclusive."
1476 if ((has_md1 && mdtype != NSH_M_TYPE1) ||
1477 (has_md2 && mdtype != NSH_M_TYPE2)) {
1478 OVS_NLERR(1, "nsh attribute has unmatched MD type %d.",
1484 (!has_base || (!has_md1 && !has_md2))) {
1487 "push_nsh: missing base or metadata attributes"
1496 static int ovs_key_from_nlattrs(struct net *net, struct sw_flow_match *match,
1497 u64 attrs, const struct nlattr **a,
1498 bool is_mask, bool log)
1502 err = metadata_from_nlattrs(net, match, &attrs, a, is_mask, log);
1506 if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) {
1507 const struct ovs_key_ethernet *eth_key;
1509 eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]);
1510 SW_FLOW_KEY_MEMCPY(match, eth.src,
1511 eth_key->eth_src, ETH_ALEN, is_mask);
1512 SW_FLOW_KEY_MEMCPY(match, eth.dst,
1513 eth_key->eth_dst, ETH_ALEN, is_mask);
1514 attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET);
1516 if (attrs & (1 << OVS_KEY_ATTR_VLAN)) {
1517 /* VLAN attribute is always parsed before getting here since it
1518 * may occur multiple times.
1520 OVS_NLERR(log, "VLAN attribute unexpected.");
1524 if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) {
1525 err = parse_eth_type_from_nlattrs(match, &attrs, a, is_mask,
1529 } else if (!is_mask) {
1530 SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask);
1532 } else if (!match->key->eth.type) {
1533 OVS_NLERR(log, "Either Ethernet header or EtherType is required.");
1537 if (attrs & (1 << OVS_KEY_ATTR_IPV4)) {
1538 const struct ovs_key_ipv4 *ipv4_key;
1540 ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]);
1541 if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) {
1542 OVS_NLERR(log, "IPv4 frag type %d is out of range max %d",
1543 ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX);
1546 SW_FLOW_KEY_PUT(match, ip.proto,
1547 ipv4_key->ipv4_proto, is_mask);
1548 SW_FLOW_KEY_PUT(match, ip.tos,
1549 ipv4_key->ipv4_tos, is_mask);
1550 SW_FLOW_KEY_PUT(match, ip.ttl,
1551 ipv4_key->ipv4_ttl, is_mask);
1552 SW_FLOW_KEY_PUT(match, ip.frag,
1553 ipv4_key->ipv4_frag, is_mask);
1554 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
1555 ipv4_key->ipv4_src, is_mask);
1556 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
1557 ipv4_key->ipv4_dst, is_mask);
1558 attrs &= ~(1 << OVS_KEY_ATTR_IPV4);
1561 if (attrs & (1 << OVS_KEY_ATTR_IPV6)) {
1562 const struct ovs_key_ipv6 *ipv6_key;
1564 ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]);
1565 if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) {
1566 OVS_NLERR(log, "IPv6 frag type %d is out of range max %d",
1567 ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX);
1571 if (!is_mask && ipv6_key->ipv6_label & htonl(0xFFF00000)) {
1572 OVS_NLERR(log, "IPv6 flow label %x is out of range (max=%x)",
1573 ntohl(ipv6_key->ipv6_label), (1 << 20) - 1);
1577 SW_FLOW_KEY_PUT(match, ipv6.label,
1578 ipv6_key->ipv6_label, is_mask);
1579 SW_FLOW_KEY_PUT(match, ip.proto,
1580 ipv6_key->ipv6_proto, is_mask);
1581 SW_FLOW_KEY_PUT(match, ip.tos,
1582 ipv6_key->ipv6_tclass, is_mask);
1583 SW_FLOW_KEY_PUT(match, ip.ttl,
1584 ipv6_key->ipv6_hlimit, is_mask);
1585 SW_FLOW_KEY_PUT(match, ip.frag,
1586 ipv6_key->ipv6_frag, is_mask);
1587 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src,
1589 sizeof(match->key->ipv6.addr.src),
1591 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst,
1593 sizeof(match->key->ipv6.addr.dst),
1596 attrs &= ~(1 << OVS_KEY_ATTR_IPV6);
1599 if (attrs & (1 << OVS_KEY_ATTR_ARP)) {
1600 const struct ovs_key_arp *arp_key;
1602 arp_key = nla_data(a[OVS_KEY_ATTR_ARP]);
1603 if (!is_mask && (arp_key->arp_op & htons(0xff00))) {
1604 OVS_NLERR(log, "Unknown ARP opcode (opcode=%d).",
1609 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
1610 arp_key->arp_sip, is_mask);
1611 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
1612 arp_key->arp_tip, is_mask);
1613 SW_FLOW_KEY_PUT(match, ip.proto,
1614 ntohs(arp_key->arp_op), is_mask);
1615 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha,
1616 arp_key->arp_sha, ETH_ALEN, is_mask);
1617 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha,
1618 arp_key->arp_tha, ETH_ALEN, is_mask);
1620 attrs &= ~(1 << OVS_KEY_ATTR_ARP);
1623 if (attrs & (1 << OVS_KEY_ATTR_NSH)) {
1624 if (nsh_key_put_from_nlattr(a[OVS_KEY_ATTR_NSH], match,
1625 is_mask, false, log) < 0)
1627 attrs &= ~(1 << OVS_KEY_ATTR_NSH);
1630 if (attrs & (1 << OVS_KEY_ATTR_MPLS)) {
1631 const struct ovs_key_mpls *mpls_key;
1633 u32 label_count, label_count_mask, i;
1635 mpls_key = nla_data(a[OVS_KEY_ATTR_MPLS]);
1636 hdr_len = nla_len(a[OVS_KEY_ATTR_MPLS]);
1637 label_count = hdr_len / sizeof(struct ovs_key_mpls);
1639 if (label_count == 0 || label_count > MPLS_LABEL_DEPTH ||
1640 hdr_len % sizeof(struct ovs_key_mpls))
1643 label_count_mask = GENMASK(label_count - 1, 0);
1645 for (i = 0 ; i < label_count; i++)
1646 SW_FLOW_KEY_PUT(match, mpls.lse[i],
1647 mpls_key[i].mpls_lse, is_mask);
1649 SW_FLOW_KEY_PUT(match, mpls.num_labels_mask,
1650 label_count_mask, is_mask);
1652 attrs &= ~(1 << OVS_KEY_ATTR_MPLS);
1655 if (attrs & (1 << OVS_KEY_ATTR_TCP)) {
1656 const struct ovs_key_tcp *tcp_key;
1658 tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]);
1659 SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask);
1660 SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask);
1661 attrs &= ~(1 << OVS_KEY_ATTR_TCP);
1664 if (attrs & (1 << OVS_KEY_ATTR_TCP_FLAGS)) {
1665 SW_FLOW_KEY_PUT(match, tp.flags,
1666 nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]),
1668 attrs &= ~(1 << OVS_KEY_ATTR_TCP_FLAGS);
1671 if (attrs & (1 << OVS_KEY_ATTR_UDP)) {
1672 const struct ovs_key_udp *udp_key;
1674 udp_key = nla_data(a[OVS_KEY_ATTR_UDP]);
1675 SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask);
1676 SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask);
1677 attrs &= ~(1 << OVS_KEY_ATTR_UDP);
1680 if (attrs & (1 << OVS_KEY_ATTR_SCTP)) {
1681 const struct ovs_key_sctp *sctp_key;
1683 sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]);
1684 SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask);
1685 SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask);
1686 attrs &= ~(1 << OVS_KEY_ATTR_SCTP);
1689 if (attrs & (1 << OVS_KEY_ATTR_ICMP)) {
1690 const struct ovs_key_icmp *icmp_key;
1692 icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]);
1693 SW_FLOW_KEY_PUT(match, tp.src,
1694 htons(icmp_key->icmp_type), is_mask);
1695 SW_FLOW_KEY_PUT(match, tp.dst,
1696 htons(icmp_key->icmp_code), is_mask);
1697 attrs &= ~(1 << OVS_KEY_ATTR_ICMP);
1700 if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) {
1701 const struct ovs_key_icmpv6 *icmpv6_key;
1703 icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]);
1704 SW_FLOW_KEY_PUT(match, tp.src,
1705 htons(icmpv6_key->icmpv6_type), is_mask);
1706 SW_FLOW_KEY_PUT(match, tp.dst,
1707 htons(icmpv6_key->icmpv6_code), is_mask);
1708 attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6);
1711 if (attrs & (1 << OVS_KEY_ATTR_ND)) {
1712 const struct ovs_key_nd *nd_key;
1714 nd_key = nla_data(a[OVS_KEY_ATTR_ND]);
1715 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target,
1717 sizeof(match->key->ipv6.nd.target),
1719 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll,
1720 nd_key->nd_sll, ETH_ALEN, is_mask);
1721 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll,
1722 nd_key->nd_tll, ETH_ALEN, is_mask);
1723 attrs &= ~(1 << OVS_KEY_ATTR_ND);
1727 OVS_NLERR(log, "Unknown key attributes %llx",
1728 (unsigned long long)attrs);
1735 static void nlattr_set(struct nlattr *attr, u8 val,
1736 const struct ovs_len_tbl *tbl)
1741 /* The nlattr stream should already have been validated */
1742 nla_for_each_nested(nla, attr, rem) {
1743 if (tbl[nla_type(nla)].len == OVS_ATTR_NESTED)
1744 nlattr_set(nla, val, tbl[nla_type(nla)].next ? : tbl);
1746 memset(nla_data(nla), val, nla_len(nla));
1748 if (nla_type(nla) == OVS_KEY_ATTR_CT_STATE)
1749 *(u32 *)nla_data(nla) &= CT_SUPPORTED_MASK;
1753 static void mask_set_nlattr(struct nlattr *attr, u8 val)
1755 nlattr_set(attr, val, ovs_key_lens);
1759 * ovs_nla_get_match - parses Netlink attributes into a flow key and
1760 * mask. In case the 'mask' is NULL, the flow is treated as exact match
1761 * flow. Otherwise, it is treated as a wildcarded flow, except the mask
1762 * does not include any don't care bit.
1763 * @net: Used to determine per-namespace field support.
1764 * @match: receives the extracted flow match information.
1765 * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
1766 * sequence. The fields should of the packet that triggered the creation
1768 * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink
1769 * attribute specifies the mask field of the wildcarded flow.
1770 * @log: Boolean to allow kernel error logging. Normally true, but when
1771 * probing for feature compatibility this should be passed in as false to
1772 * suppress unnecessary error logging.
1774 int ovs_nla_get_match(struct net *net, struct sw_flow_match *match,
1775 const struct nlattr *nla_key,
1776 const struct nlattr *nla_mask,
1779 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
1780 struct nlattr *newmask = NULL;
1785 err = parse_flow_nlattrs(nla_key, a, &key_attrs, log);
1789 err = parse_vlan_from_nlattrs(match, &key_attrs, a, false, log);
1793 err = ovs_key_from_nlattrs(net, match, key_attrs, a, false, log);
1799 /* Create an exact match mask. We need to set to 0xff
1800 * all the 'match->mask' fields that have been touched
1801 * in 'match->key'. We cannot simply memset
1802 * 'match->mask', because padding bytes and fields not
1803 * specified in 'match->key' should be left to 0.
1804 * Instead, we use a stream of netlink attributes,
1805 * copied from 'key' and set to 0xff.
1806 * ovs_key_from_nlattrs() will take care of filling
1807 * 'match->mask' appropriately.
1809 newmask = kmemdup(nla_key,
1810 nla_total_size(nla_len(nla_key)),
1815 mask_set_nlattr(newmask, 0xff);
1817 /* The userspace does not send tunnel attributes that
1818 * are 0, but we should not wildcard them nonetheless.
1820 if (match->key->tun_proto)
1821 SW_FLOW_KEY_MEMSET_FIELD(match, tun_key,
1827 err = parse_flow_mask_nlattrs(nla_mask, a, &mask_attrs, log);
1831 /* Always match on tci. */
1832 SW_FLOW_KEY_PUT(match, eth.vlan.tci, htons(0xffff), true);
1833 SW_FLOW_KEY_PUT(match, eth.cvlan.tci, htons(0xffff), true);
1835 err = parse_vlan_from_nlattrs(match, &mask_attrs, a, true, log);
1839 err = ovs_key_from_nlattrs(net, match, mask_attrs, a, true,
1845 if (!match_validate(match, key_attrs, mask_attrs, log))
1853 static size_t get_ufid_len(const struct nlattr *attr, bool log)
1860 len = nla_len(attr);
1861 if (len < 1 || len > MAX_UFID_LENGTH) {
1862 OVS_NLERR(log, "ufid size %u bytes exceeds the range (1, %d)",
1863 nla_len(attr), MAX_UFID_LENGTH);
1870 /* Initializes 'flow->ufid', returning true if 'attr' contains a valid UFID,
1871 * or false otherwise.
1873 bool ovs_nla_get_ufid(struct sw_flow_id *sfid, const struct nlattr *attr,
1876 sfid->ufid_len = get_ufid_len(attr, log);
1878 memcpy(sfid->ufid, nla_data(attr), sfid->ufid_len);
1880 return sfid->ufid_len;
1883 int ovs_nla_get_identifier(struct sw_flow_id *sfid, const struct nlattr *ufid,
1884 const struct sw_flow_key *key, bool log)
1886 struct sw_flow_key *new_key;
1888 if (ovs_nla_get_ufid(sfid, ufid, log))
1891 /* If UFID was not provided, use unmasked key. */
1892 new_key = kmalloc(sizeof(*new_key), GFP_KERNEL);
1895 memcpy(new_key, key, sizeof(*key));
1896 sfid->unmasked_key = new_key;
1901 u32 ovs_nla_get_ufid_flags(const struct nlattr *attr)
1903 return attr ? nla_get_u32(attr) : 0;
1907 * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key.
1908 * @net: Network namespace.
1909 * @key: Receives extracted in_port, priority, tun_key, skb_mark and conntrack
1911 * @a: Array of netlink attributes holding parsed %OVS_KEY_ATTR_* Netlink
1913 * @attrs: Bit mask for the netlink attributes included in @a.
1914 * @log: Boolean to allow kernel error logging. Normally true, but when
1915 * probing for feature compatibility this should be passed in as false to
1916 * suppress unnecessary error logging.
1918 * This parses a series of Netlink attributes that form a flow key, which must
1919 * take the same form accepted by flow_from_nlattrs(), but only enough of it to
1920 * get the metadata, that is, the parts of the flow key that cannot be
1921 * extracted from the packet itself.
1923 * This must be called before the packet key fields are filled in 'key'.
1926 int ovs_nla_get_flow_metadata(struct net *net,
1927 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1],
1928 u64 attrs, struct sw_flow_key *key, bool log)
1930 struct sw_flow_match match;
1932 memset(&match, 0, sizeof(match));
1937 key->ct_orig_proto = 0;
1938 memset(&key->ct, 0, sizeof(key->ct));
1939 memset(&key->ipv4.ct_orig, 0, sizeof(key->ipv4.ct_orig));
1940 memset(&key->ipv6.ct_orig, 0, sizeof(key->ipv6.ct_orig));
1942 key->phy.in_port = DP_MAX_PORTS;
1944 return metadata_from_nlattrs(net, &match, &attrs, a, false, log);
1947 static int ovs_nla_put_vlan(struct sk_buff *skb, const struct vlan_head *vh,
1950 __be16 eth_type = !is_mask ? vh->tpid : htons(0xffff);
1952 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) ||
1953 nla_put_be16(skb, OVS_KEY_ATTR_VLAN, vh->tci))
1958 static int nsh_key_to_nlattr(const struct ovs_key_nsh *nsh, bool is_mask,
1959 struct sk_buff *skb)
1961 struct nlattr *start;
1963 start = nla_nest_start_noflag(skb, OVS_KEY_ATTR_NSH);
1967 if (nla_put(skb, OVS_NSH_KEY_ATTR_BASE, sizeof(nsh->base), &nsh->base))
1968 goto nla_put_failure;
1970 if (is_mask || nsh->base.mdtype == NSH_M_TYPE1) {
1971 if (nla_put(skb, OVS_NSH_KEY_ATTR_MD1,
1972 sizeof(nsh->context), nsh->context))
1973 goto nla_put_failure;
1976 /* Don't support MD type 2 yet */
1978 nla_nest_end(skb, start);
1986 static int __ovs_nla_put_key(const struct sw_flow_key *swkey,
1987 const struct sw_flow_key *output, bool is_mask,
1988 struct sk_buff *skb)
1990 struct ovs_key_ethernet *eth_key;
1992 struct nlattr *encap = NULL;
1993 struct nlattr *in_encap = NULL;
1995 if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id))
1996 goto nla_put_failure;
1998 if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash))
1999 goto nla_put_failure;
2001 if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority))
2002 goto nla_put_failure;
2004 if ((swkey->tun_proto || is_mask)) {
2005 const void *opts = NULL;
2007 if (output->tun_key.tun_flags & TUNNEL_OPTIONS_PRESENT)
2008 opts = TUN_METADATA_OPTS(output, swkey->tun_opts_len);
2010 if (ip_tun_to_nlattr(skb, &output->tun_key, opts,
2011 swkey->tun_opts_len, swkey->tun_proto, 0))
2012 goto nla_put_failure;
2015 if (swkey->phy.in_port == DP_MAX_PORTS) {
2016 if (is_mask && (output->phy.in_port == 0xffff))
2017 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff))
2018 goto nla_put_failure;
2021 upper_u16 = !is_mask ? 0 : 0xffff;
2023 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT,
2024 (upper_u16 << 16) | output->phy.in_port))
2025 goto nla_put_failure;
2028 if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark))
2029 goto nla_put_failure;
2031 if (ovs_ct_put_key(swkey, output, skb))
2032 goto nla_put_failure;
2034 if (ovs_key_mac_proto(swkey) == MAC_PROTO_ETHERNET) {
2035 nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key));
2037 goto nla_put_failure;
2039 eth_key = nla_data(nla);
2040 ether_addr_copy(eth_key->eth_src, output->eth.src);
2041 ether_addr_copy(eth_key->eth_dst, output->eth.dst);
2043 if (swkey->eth.vlan.tci || eth_type_vlan(swkey->eth.type)) {
2044 if (ovs_nla_put_vlan(skb, &output->eth.vlan, is_mask))
2045 goto nla_put_failure;
2046 encap = nla_nest_start_noflag(skb, OVS_KEY_ATTR_ENCAP);
2047 if (!swkey->eth.vlan.tci)
2050 if (swkey->eth.cvlan.tci || eth_type_vlan(swkey->eth.type)) {
2051 if (ovs_nla_put_vlan(skb, &output->eth.cvlan, is_mask))
2052 goto nla_put_failure;
2053 in_encap = nla_nest_start_noflag(skb,
2054 OVS_KEY_ATTR_ENCAP);
2055 if (!swkey->eth.cvlan.tci)
2060 if (swkey->eth.type == htons(ETH_P_802_2)) {
2062 * Ethertype 802.2 is represented in the netlink with omitted
2063 * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and
2064 * 0xffff in the mask attribute. Ethertype can also
2067 if (is_mask && output->eth.type)
2068 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE,
2070 goto nla_put_failure;
2075 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type))
2076 goto nla_put_failure;
2078 if (eth_type_vlan(swkey->eth.type)) {
2079 /* There are 3 VLAN tags, we don't know anything about the rest
2080 * of the packet, so truncate here.
2082 WARN_ON_ONCE(!(encap && in_encap));
2086 if (swkey->eth.type == htons(ETH_P_IP)) {
2087 struct ovs_key_ipv4 *ipv4_key;
2089 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key));
2091 goto nla_put_failure;
2092 ipv4_key = nla_data(nla);
2093 ipv4_key->ipv4_src = output->ipv4.addr.src;
2094 ipv4_key->ipv4_dst = output->ipv4.addr.dst;
2095 ipv4_key->ipv4_proto = output->ip.proto;
2096 ipv4_key->ipv4_tos = output->ip.tos;
2097 ipv4_key->ipv4_ttl = output->ip.ttl;
2098 ipv4_key->ipv4_frag = output->ip.frag;
2099 } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
2100 struct ovs_key_ipv6 *ipv6_key;
2102 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key));
2104 goto nla_put_failure;
2105 ipv6_key = nla_data(nla);
2106 memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src,
2107 sizeof(ipv6_key->ipv6_src));
2108 memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst,
2109 sizeof(ipv6_key->ipv6_dst));
2110 ipv6_key->ipv6_label = output->ipv6.label;
2111 ipv6_key->ipv6_proto = output->ip.proto;
2112 ipv6_key->ipv6_tclass = output->ip.tos;
2113 ipv6_key->ipv6_hlimit = output->ip.ttl;
2114 ipv6_key->ipv6_frag = output->ip.frag;
2115 } else if (swkey->eth.type == htons(ETH_P_NSH)) {
2116 if (nsh_key_to_nlattr(&output->nsh, is_mask, skb))
2117 goto nla_put_failure;
2118 } else if (swkey->eth.type == htons(ETH_P_ARP) ||
2119 swkey->eth.type == htons(ETH_P_RARP)) {
2120 struct ovs_key_arp *arp_key;
2122 nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key));
2124 goto nla_put_failure;
2125 arp_key = nla_data(nla);
2126 memset(arp_key, 0, sizeof(struct ovs_key_arp));
2127 arp_key->arp_sip = output->ipv4.addr.src;
2128 arp_key->arp_tip = output->ipv4.addr.dst;
2129 arp_key->arp_op = htons(output->ip.proto);
2130 ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha);
2131 ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha);
2132 } else if (eth_p_mpls(swkey->eth.type)) {
2134 struct ovs_key_mpls *mpls_key;
2136 num_labels = hweight_long(output->mpls.num_labels_mask);
2137 nla = nla_reserve(skb, OVS_KEY_ATTR_MPLS,
2138 num_labels * sizeof(*mpls_key));
2140 goto nla_put_failure;
2142 mpls_key = nla_data(nla);
2143 for (i = 0; i < num_labels; i++)
2144 mpls_key[i].mpls_lse = output->mpls.lse[i];
2147 if ((swkey->eth.type == htons(ETH_P_IP) ||
2148 swkey->eth.type == htons(ETH_P_IPV6)) &&
2149 swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
2151 if (swkey->ip.proto == IPPROTO_TCP) {
2152 struct ovs_key_tcp *tcp_key;
2154 nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key));
2156 goto nla_put_failure;
2157 tcp_key = nla_data(nla);
2158 tcp_key->tcp_src = output->tp.src;
2159 tcp_key->tcp_dst = output->tp.dst;
2160 if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS,
2162 goto nla_put_failure;
2163 } else if (swkey->ip.proto == IPPROTO_UDP) {
2164 struct ovs_key_udp *udp_key;
2166 nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key));
2168 goto nla_put_failure;
2169 udp_key = nla_data(nla);
2170 udp_key->udp_src = output->tp.src;
2171 udp_key->udp_dst = output->tp.dst;
2172 } else if (swkey->ip.proto == IPPROTO_SCTP) {
2173 struct ovs_key_sctp *sctp_key;
2175 nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key));
2177 goto nla_put_failure;
2178 sctp_key = nla_data(nla);
2179 sctp_key->sctp_src = output->tp.src;
2180 sctp_key->sctp_dst = output->tp.dst;
2181 } else if (swkey->eth.type == htons(ETH_P_IP) &&
2182 swkey->ip.proto == IPPROTO_ICMP) {
2183 struct ovs_key_icmp *icmp_key;
2185 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key));
2187 goto nla_put_failure;
2188 icmp_key = nla_data(nla);
2189 icmp_key->icmp_type = ntohs(output->tp.src);
2190 icmp_key->icmp_code = ntohs(output->tp.dst);
2191 } else if (swkey->eth.type == htons(ETH_P_IPV6) &&
2192 swkey->ip.proto == IPPROTO_ICMPV6) {
2193 struct ovs_key_icmpv6 *icmpv6_key;
2195 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6,
2196 sizeof(*icmpv6_key));
2198 goto nla_put_failure;
2199 icmpv6_key = nla_data(nla);
2200 icmpv6_key->icmpv6_type = ntohs(output->tp.src);
2201 icmpv6_key->icmpv6_code = ntohs(output->tp.dst);
2203 if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION ||
2204 icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) {
2205 struct ovs_key_nd *nd_key;
2207 nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key));
2209 goto nla_put_failure;
2210 nd_key = nla_data(nla);
2211 memcpy(nd_key->nd_target, &output->ipv6.nd.target,
2212 sizeof(nd_key->nd_target));
2213 ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll);
2214 ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll);
2221 nla_nest_end(skb, in_encap);
2223 nla_nest_end(skb, encap);
2231 int ovs_nla_put_key(const struct sw_flow_key *swkey,
2232 const struct sw_flow_key *output, int attr, bool is_mask,
2233 struct sk_buff *skb)
2238 nla = nla_nest_start_noflag(skb, attr);
2241 err = __ovs_nla_put_key(swkey, output, is_mask, skb);
2244 nla_nest_end(skb, nla);
2249 /* Called with ovs_mutex or RCU read lock. */
2250 int ovs_nla_put_identifier(const struct sw_flow *flow, struct sk_buff *skb)
2252 if (ovs_identifier_is_ufid(&flow->id))
2253 return nla_put(skb, OVS_FLOW_ATTR_UFID, flow->id.ufid_len,
2256 return ovs_nla_put_key(flow->id.unmasked_key, flow->id.unmasked_key,
2257 OVS_FLOW_ATTR_KEY, false, skb);
2260 /* Called with ovs_mutex or RCU read lock. */
2261 int ovs_nla_put_masked_key(const struct sw_flow *flow, struct sk_buff *skb)
2263 return ovs_nla_put_key(&flow->key, &flow->key,
2264 OVS_FLOW_ATTR_KEY, false, skb);
2267 /* Called with ovs_mutex or RCU read lock. */
2268 int ovs_nla_put_mask(const struct sw_flow *flow, struct sk_buff *skb)
2270 return ovs_nla_put_key(&flow->key, &flow->mask->key,
2271 OVS_FLOW_ATTR_MASK, true, skb);
2274 #define MAX_ACTIONS_BUFSIZE (32 * 1024)
2276 static struct sw_flow_actions *nla_alloc_flow_actions(int size)
2278 struct sw_flow_actions *sfa;
2280 WARN_ON_ONCE(size > MAX_ACTIONS_BUFSIZE);
2282 sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL);
2284 return ERR_PTR(-ENOMEM);
2286 sfa->actions_len = 0;
2290 static void ovs_nla_free_set_action(const struct nlattr *a)
2292 const struct nlattr *ovs_key = nla_data(a);
2293 struct ovs_tunnel_info *ovs_tun;
2295 switch (nla_type(ovs_key)) {
2296 case OVS_KEY_ATTR_TUNNEL_INFO:
2297 ovs_tun = nla_data(ovs_key);
2298 dst_release((struct dst_entry *)ovs_tun->tun_dst);
2303 void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts)
2305 const struct nlattr *a;
2311 nla_for_each_attr(a, sf_acts->actions, sf_acts->actions_len, rem) {
2312 switch (nla_type(a)) {
2313 case OVS_ACTION_ATTR_SET:
2314 ovs_nla_free_set_action(a);
2316 case OVS_ACTION_ATTR_CT:
2317 ovs_ct_free_action(a);
2325 static void __ovs_nla_free_flow_actions(struct rcu_head *head)
2327 ovs_nla_free_flow_actions(container_of(head, struct sw_flow_actions, rcu));
2330 /* Schedules 'sf_acts' to be freed after the next RCU grace period.
2331 * The caller must hold rcu_read_lock for this to be sensible. */
2332 void ovs_nla_free_flow_actions_rcu(struct sw_flow_actions *sf_acts)
2334 call_rcu(&sf_acts->rcu, __ovs_nla_free_flow_actions);
2337 static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa,
2338 int attr_len, bool log)
2341 struct sw_flow_actions *acts;
2343 size_t req_size = NLA_ALIGN(attr_len);
2344 int next_offset = offsetof(struct sw_flow_actions, actions) +
2345 (*sfa)->actions_len;
2347 if (req_size <= (ksize(*sfa) - next_offset))
2350 new_acts_size = max(next_offset + req_size, ksize(*sfa) * 2);
2352 if (new_acts_size > MAX_ACTIONS_BUFSIZE) {
2353 if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size) {
2354 OVS_NLERR(log, "Flow action size exceeds max %u",
2355 MAX_ACTIONS_BUFSIZE);
2356 return ERR_PTR(-EMSGSIZE);
2358 new_acts_size = MAX_ACTIONS_BUFSIZE;
2361 acts = nla_alloc_flow_actions(new_acts_size);
2363 return (void *)acts;
2365 memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len);
2366 acts->actions_len = (*sfa)->actions_len;
2367 acts->orig_len = (*sfa)->orig_len;
2372 (*sfa)->actions_len += req_size;
2373 return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset);
2376 static struct nlattr *__add_action(struct sw_flow_actions **sfa,
2377 int attrtype, void *data, int len, bool log)
2381 a = reserve_sfa_size(sfa, nla_attr_size(len), log);
2385 a->nla_type = attrtype;
2386 a->nla_len = nla_attr_size(len);
2389 memcpy(nla_data(a), data, len);
2390 memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len));
2395 int ovs_nla_add_action(struct sw_flow_actions **sfa, int attrtype, void *data,
2400 a = __add_action(sfa, attrtype, data, len, log);
2402 return PTR_ERR_OR_ZERO(a);
2405 static inline int add_nested_action_start(struct sw_flow_actions **sfa,
2406 int attrtype, bool log)
2408 int used = (*sfa)->actions_len;
2411 err = ovs_nla_add_action(sfa, attrtype, NULL, 0, log);
2418 static inline void add_nested_action_end(struct sw_flow_actions *sfa,
2421 struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions +
2424 a->nla_len = sfa->actions_len - st_offset;
2427 static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
2428 const struct sw_flow_key *key,
2429 struct sw_flow_actions **sfa,
2430 __be16 eth_type, __be16 vlan_tci,
2431 u32 mpls_label_count, bool log);
2433 static int validate_and_copy_sample(struct net *net, const struct nlattr *attr,
2434 const struct sw_flow_key *key,
2435 struct sw_flow_actions **sfa,
2436 __be16 eth_type, __be16 vlan_tci,
2437 u32 mpls_label_count, bool log, bool last)
2439 const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];
2440 const struct nlattr *probability, *actions;
2441 const struct nlattr *a;
2442 int rem, start, err;
2443 struct sample_arg arg;
2445 memset(attrs, 0, sizeof(attrs));
2446 nla_for_each_nested(a, attr, rem) {
2447 int type = nla_type(a);
2448 if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type])
2455 probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY];
2456 if (!probability || nla_len(probability) != sizeof(u32))
2459 actions = attrs[OVS_SAMPLE_ATTR_ACTIONS];
2460 if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN))
2463 /* validation done, copy sample action. */
2464 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE, log);
2468 /* When both skb and flow may be changed, put the sample
2469 * into a deferred fifo. On the other hand, if only skb
2470 * may be modified, the actions can be executed in place.
2472 * Do this analysis at the flow installation time.
2473 * Set 'clone_action->exec' to true if the actions can be
2474 * executed without being deferred.
2476 * If the sample is the last action, it can always be excuted
2477 * rather than deferred.
2479 arg.exec = last || !actions_may_change_flow(actions);
2480 arg.probability = nla_get_u32(probability);
2482 err = ovs_nla_add_action(sfa, OVS_SAMPLE_ATTR_ARG, &arg, sizeof(arg),
2487 err = __ovs_nla_copy_actions(net, actions, key, sfa,
2488 eth_type, vlan_tci, mpls_label_count, log);
2493 add_nested_action_end(*sfa, start);
2498 static int validate_and_copy_clone(struct net *net,
2499 const struct nlattr *attr,
2500 const struct sw_flow_key *key,
2501 struct sw_flow_actions **sfa,
2502 __be16 eth_type, __be16 vlan_tci,
2503 u32 mpls_label_count, bool log, bool last)
2508 if (nla_len(attr) && nla_len(attr) < NLA_HDRLEN)
2511 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_CLONE, log);
2515 exec = last || !actions_may_change_flow(attr);
2517 err = ovs_nla_add_action(sfa, OVS_CLONE_ATTR_EXEC, &exec,
2522 err = __ovs_nla_copy_actions(net, attr, key, sfa,
2523 eth_type, vlan_tci, mpls_label_count, log);
2527 add_nested_action_end(*sfa, start);
2532 void ovs_match_init(struct sw_flow_match *match,
2533 struct sw_flow_key *key,
2535 struct sw_flow_mask *mask)
2537 memset(match, 0, sizeof(*match));
2542 memset(key, 0, sizeof(*key));
2545 memset(&mask->key, 0, sizeof(mask->key));
2546 mask->range.start = mask->range.end = 0;
2550 static int validate_geneve_opts(struct sw_flow_key *key)
2552 struct geneve_opt *option;
2553 int opts_len = key->tun_opts_len;
2554 bool crit_opt = false;
2556 option = (struct geneve_opt *)TUN_METADATA_OPTS(key, key->tun_opts_len);
2557 while (opts_len > 0) {
2560 if (opts_len < sizeof(*option))
2563 len = sizeof(*option) + option->length * 4;
2567 crit_opt |= !!(option->type & GENEVE_CRIT_OPT_TYPE);
2569 option = (struct geneve_opt *)((u8 *)option + len);
2573 key->tun_key.tun_flags |= crit_opt ? TUNNEL_CRIT_OPT : 0;
2578 static int validate_and_copy_set_tun(const struct nlattr *attr,
2579 struct sw_flow_actions **sfa, bool log)
2581 struct sw_flow_match match;
2582 struct sw_flow_key key;
2583 struct metadata_dst *tun_dst;
2584 struct ip_tunnel_info *tun_info;
2585 struct ovs_tunnel_info *ovs_tun;
2587 int err = 0, start, opts_type;
2588 __be16 dst_opt_type;
2591 ovs_match_init(&match, &key, true, NULL);
2592 opts_type = ip_tun_from_nlattr(nla_data(attr), &match, false, log);
2596 if (key.tun_opts_len) {
2597 switch (opts_type) {
2598 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
2599 err = validate_geneve_opts(&key);
2602 dst_opt_type = TUNNEL_GENEVE_OPT;
2604 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
2605 dst_opt_type = TUNNEL_VXLAN_OPT;
2607 case OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS:
2608 dst_opt_type = TUNNEL_ERSPAN_OPT;
2613 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET, log);
2617 tun_dst = metadata_dst_alloc(key.tun_opts_len, METADATA_IP_TUNNEL,
2623 err = dst_cache_init(&tun_dst->u.tun_info.dst_cache, GFP_KERNEL);
2625 dst_release((struct dst_entry *)tun_dst);
2629 a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL,
2630 sizeof(*ovs_tun), log);
2632 dst_release((struct dst_entry *)tun_dst);
2636 ovs_tun = nla_data(a);
2637 ovs_tun->tun_dst = tun_dst;
2639 tun_info = &tun_dst->u.tun_info;
2640 tun_info->mode = IP_TUNNEL_INFO_TX;
2641 if (key.tun_proto == AF_INET6)
2642 tun_info->mode |= IP_TUNNEL_INFO_IPV6;
2643 else if (key.tun_proto == AF_INET && key.tun_key.u.ipv4.dst == 0)
2644 tun_info->mode |= IP_TUNNEL_INFO_BRIDGE;
2645 tun_info->key = key.tun_key;
2647 /* We need to store the options in the action itself since
2648 * everything else will go away after flow setup. We can append
2649 * it to tun_info and then point there.
2651 ip_tunnel_info_opts_set(tun_info,
2652 TUN_METADATA_OPTS(&key, key.tun_opts_len),
2653 key.tun_opts_len, dst_opt_type);
2654 add_nested_action_end(*sfa, start);
2659 static bool validate_nsh(const struct nlattr *attr, bool is_mask,
2660 bool is_push_nsh, bool log)
2662 struct sw_flow_match match;
2663 struct sw_flow_key key;
2666 ovs_match_init(&match, &key, true, NULL);
2667 ret = nsh_key_put_from_nlattr(attr, &match, is_mask,
2672 /* Return false if there are any non-masked bits set.
2673 * Mask follows data immediately, before any netlink padding.
2675 static bool validate_masked(u8 *data, int len)
2677 u8 *mask = data + len;
2680 if (*data++ & ~*mask++)
2686 static int validate_set(const struct nlattr *a,
2687 const struct sw_flow_key *flow_key,
2688 struct sw_flow_actions **sfa, bool *skip_copy,
2689 u8 mac_proto, __be16 eth_type, bool masked, bool log)
2691 const struct nlattr *ovs_key = nla_data(a);
2692 int key_type = nla_type(ovs_key);
2695 /* There can be only one key in a action */
2696 if (nla_total_size(nla_len(ovs_key)) != nla_len(a))
2699 key_len = nla_len(ovs_key);
2703 if (key_type > OVS_KEY_ATTR_MAX ||
2704 !check_attr_len(key_len, ovs_key_lens[key_type].len))
2707 if (masked && !validate_masked(nla_data(ovs_key), key_len))
2711 const struct ovs_key_ipv4 *ipv4_key;
2712 const struct ovs_key_ipv6 *ipv6_key;
2715 case OVS_KEY_ATTR_PRIORITY:
2716 case OVS_KEY_ATTR_SKB_MARK:
2717 case OVS_KEY_ATTR_CT_MARK:
2718 case OVS_KEY_ATTR_CT_LABELS:
2721 case OVS_KEY_ATTR_ETHERNET:
2722 if (mac_proto != MAC_PROTO_ETHERNET)
2726 case OVS_KEY_ATTR_TUNNEL:
2728 return -EINVAL; /* Masked tunnel set not supported. */
2731 err = validate_and_copy_set_tun(a, sfa, log);
2736 case OVS_KEY_ATTR_IPV4:
2737 if (eth_type != htons(ETH_P_IP))
2740 ipv4_key = nla_data(ovs_key);
2743 const struct ovs_key_ipv4 *mask = ipv4_key + 1;
2745 /* Non-writeable fields. */
2746 if (mask->ipv4_proto || mask->ipv4_frag)
2749 if (ipv4_key->ipv4_proto != flow_key->ip.proto)
2752 if (ipv4_key->ipv4_frag != flow_key->ip.frag)
2757 case OVS_KEY_ATTR_IPV6:
2758 if (eth_type != htons(ETH_P_IPV6))
2761 ipv6_key = nla_data(ovs_key);
2764 const struct ovs_key_ipv6 *mask = ipv6_key + 1;
2766 /* Non-writeable fields. */
2767 if (mask->ipv6_proto || mask->ipv6_frag)
2770 /* Invalid bits in the flow label mask? */
2771 if (ntohl(mask->ipv6_label) & 0xFFF00000)
2774 if (ipv6_key->ipv6_proto != flow_key->ip.proto)
2777 if (ipv6_key->ipv6_frag != flow_key->ip.frag)
2780 if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000)
2785 case OVS_KEY_ATTR_TCP:
2786 if ((eth_type != htons(ETH_P_IP) &&
2787 eth_type != htons(ETH_P_IPV6)) ||
2788 flow_key->ip.proto != IPPROTO_TCP)
2793 case OVS_KEY_ATTR_UDP:
2794 if ((eth_type != htons(ETH_P_IP) &&
2795 eth_type != htons(ETH_P_IPV6)) ||
2796 flow_key->ip.proto != IPPROTO_UDP)
2801 case OVS_KEY_ATTR_MPLS:
2802 if (!eth_p_mpls(eth_type))
2806 case OVS_KEY_ATTR_SCTP:
2807 if ((eth_type != htons(ETH_P_IP) &&
2808 eth_type != htons(ETH_P_IPV6)) ||
2809 flow_key->ip.proto != IPPROTO_SCTP)
2814 case OVS_KEY_ATTR_NSH:
2815 if (eth_type != htons(ETH_P_NSH))
2817 if (!validate_nsh(nla_data(a), masked, false, log))
2825 /* Convert non-masked non-tunnel set actions to masked set actions. */
2826 if (!masked && key_type != OVS_KEY_ATTR_TUNNEL) {
2827 int start, len = key_len * 2;
2832 start = add_nested_action_start(sfa,
2833 OVS_ACTION_ATTR_SET_TO_MASKED,
2838 at = __add_action(sfa, key_type, NULL, len, log);
2842 memcpy(nla_data(at), nla_data(ovs_key), key_len); /* Key. */
2843 memset(nla_data(at) + key_len, 0xff, key_len); /* Mask. */
2844 /* Clear non-writeable bits from otherwise writeable fields. */
2845 if (key_type == OVS_KEY_ATTR_IPV6) {
2846 struct ovs_key_ipv6 *mask = nla_data(at) + key_len;
2848 mask->ipv6_label &= htonl(0x000FFFFF);
2850 add_nested_action_end(*sfa, start);
2856 static int validate_userspace(const struct nlattr *attr)
2858 static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = {
2859 [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 },
2860 [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC },
2861 [OVS_USERSPACE_ATTR_EGRESS_TUN_PORT] = {.type = NLA_U32 },
2863 struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];
2866 error = nla_parse_nested_deprecated(a, OVS_USERSPACE_ATTR_MAX, attr,
2867 userspace_policy, NULL);
2871 if (!a[OVS_USERSPACE_ATTR_PID] ||
2872 !nla_get_u32(a[OVS_USERSPACE_ATTR_PID]))
2878 static const struct nla_policy cpl_policy[OVS_CHECK_PKT_LEN_ATTR_MAX + 1] = {
2879 [OVS_CHECK_PKT_LEN_ATTR_PKT_LEN] = {.type = NLA_U16 },
2880 [OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER] = {.type = NLA_NESTED },
2881 [OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL] = {.type = NLA_NESTED },
2884 static int validate_and_copy_check_pkt_len(struct net *net,
2885 const struct nlattr *attr,
2886 const struct sw_flow_key *key,
2887 struct sw_flow_actions **sfa,
2888 __be16 eth_type, __be16 vlan_tci,
2889 u32 mpls_label_count,
2890 bool log, bool last)
2892 const struct nlattr *acts_if_greater, *acts_if_lesser_eq;
2893 struct nlattr *a[OVS_CHECK_PKT_LEN_ATTR_MAX + 1];
2894 struct check_pkt_len_arg arg;
2895 int nested_acts_start;
2898 err = nla_parse_deprecated_strict(a, OVS_CHECK_PKT_LEN_ATTR_MAX,
2899 nla_data(attr), nla_len(attr),
2904 if (!a[OVS_CHECK_PKT_LEN_ATTR_PKT_LEN] ||
2905 !nla_get_u16(a[OVS_CHECK_PKT_LEN_ATTR_PKT_LEN]))
2908 acts_if_lesser_eq = a[OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL];
2909 acts_if_greater = a[OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER];
2911 /* Both the nested action should be present. */
2912 if (!acts_if_greater || !acts_if_lesser_eq)
2915 /* validation done, copy the nested actions. */
2916 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_CHECK_PKT_LEN,
2921 arg.pkt_len = nla_get_u16(a[OVS_CHECK_PKT_LEN_ATTR_PKT_LEN]);
2922 arg.exec_for_lesser_equal =
2923 last || !actions_may_change_flow(acts_if_lesser_eq);
2924 arg.exec_for_greater =
2925 last || !actions_may_change_flow(acts_if_greater);
2927 err = ovs_nla_add_action(sfa, OVS_CHECK_PKT_LEN_ATTR_ARG, &arg,
2932 nested_acts_start = add_nested_action_start(sfa,
2933 OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL, log);
2934 if (nested_acts_start < 0)
2935 return nested_acts_start;
2937 err = __ovs_nla_copy_actions(net, acts_if_lesser_eq, key, sfa,
2938 eth_type, vlan_tci, mpls_label_count, log);
2943 add_nested_action_end(*sfa, nested_acts_start);
2945 nested_acts_start = add_nested_action_start(sfa,
2946 OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER, log);
2947 if (nested_acts_start < 0)
2948 return nested_acts_start;
2950 err = __ovs_nla_copy_actions(net, acts_if_greater, key, sfa,
2951 eth_type, vlan_tci, mpls_label_count, log);
2956 add_nested_action_end(*sfa, nested_acts_start);
2957 add_nested_action_end(*sfa, start);
2961 static int copy_action(const struct nlattr *from,
2962 struct sw_flow_actions **sfa, bool log)
2964 int totlen = NLA_ALIGN(from->nla_len);
2967 to = reserve_sfa_size(sfa, from->nla_len, log);
2971 memcpy(to, from, totlen);
2975 static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
2976 const struct sw_flow_key *key,
2977 struct sw_flow_actions **sfa,
2978 __be16 eth_type, __be16 vlan_tci,
2979 u32 mpls_label_count, bool log)
2981 u8 mac_proto = ovs_key_mac_proto(key);
2982 const struct nlattr *a;
2985 nla_for_each_nested(a, attr, rem) {
2986 /* Expected argument lengths, (u32)-1 for variable length. */
2987 static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {
2988 [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32),
2989 [OVS_ACTION_ATTR_RECIRC] = sizeof(u32),
2990 [OVS_ACTION_ATTR_USERSPACE] = (u32)-1,
2991 [OVS_ACTION_ATTR_PUSH_MPLS] = sizeof(struct ovs_action_push_mpls),
2992 [OVS_ACTION_ATTR_POP_MPLS] = sizeof(__be16),
2993 [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan),
2994 [OVS_ACTION_ATTR_POP_VLAN] = 0,
2995 [OVS_ACTION_ATTR_SET] = (u32)-1,
2996 [OVS_ACTION_ATTR_SET_MASKED] = (u32)-1,
2997 [OVS_ACTION_ATTR_SAMPLE] = (u32)-1,
2998 [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash),
2999 [OVS_ACTION_ATTR_CT] = (u32)-1,
3000 [OVS_ACTION_ATTR_CT_CLEAR] = 0,
3001 [OVS_ACTION_ATTR_TRUNC] = sizeof(struct ovs_action_trunc),
3002 [OVS_ACTION_ATTR_PUSH_ETH] = sizeof(struct ovs_action_push_eth),
3003 [OVS_ACTION_ATTR_POP_ETH] = 0,
3004 [OVS_ACTION_ATTR_PUSH_NSH] = (u32)-1,
3005 [OVS_ACTION_ATTR_POP_NSH] = 0,
3006 [OVS_ACTION_ATTR_METER] = sizeof(u32),
3007 [OVS_ACTION_ATTR_CLONE] = (u32)-1,
3008 [OVS_ACTION_ATTR_CHECK_PKT_LEN] = (u32)-1,
3009 [OVS_ACTION_ATTR_ADD_MPLS] = sizeof(struct ovs_action_add_mpls),
3011 const struct ovs_action_push_vlan *vlan;
3012 int type = nla_type(a);
3015 if (type > OVS_ACTION_ATTR_MAX ||
3016 (action_lens[type] != nla_len(a) &&
3017 action_lens[type] != (u32)-1))
3022 case OVS_ACTION_ATTR_UNSPEC:
3025 case OVS_ACTION_ATTR_USERSPACE:
3026 err = validate_userspace(a);
3031 case OVS_ACTION_ATTR_OUTPUT:
3032 if (nla_get_u32(a) >= DP_MAX_PORTS)
3036 case OVS_ACTION_ATTR_TRUNC: {
3037 const struct ovs_action_trunc *trunc = nla_data(a);
3039 if (trunc->max_len < ETH_HLEN)
3044 case OVS_ACTION_ATTR_HASH: {
3045 const struct ovs_action_hash *act_hash = nla_data(a);
3047 switch (act_hash->hash_alg) {
3048 case OVS_HASH_ALG_L4:
3057 case OVS_ACTION_ATTR_POP_VLAN:
3058 if (mac_proto != MAC_PROTO_ETHERNET)
3060 vlan_tci = htons(0);
3063 case OVS_ACTION_ATTR_PUSH_VLAN:
3064 if (mac_proto != MAC_PROTO_ETHERNET)
3067 if (!eth_type_vlan(vlan->vlan_tpid))
3069 if (!(vlan->vlan_tci & htons(VLAN_CFI_MASK)))
3071 vlan_tci = vlan->vlan_tci;
3074 case OVS_ACTION_ATTR_RECIRC:
3077 case OVS_ACTION_ATTR_ADD_MPLS: {
3078 const struct ovs_action_add_mpls *mpls = nla_data(a);
3080 if (!eth_p_mpls(mpls->mpls_ethertype))
3083 if (mpls->tun_flags & OVS_MPLS_L3_TUNNEL_FLAG_MASK) {
3084 if (vlan_tci & htons(VLAN_CFI_MASK) ||
3085 (eth_type != htons(ETH_P_IP) &&
3086 eth_type != htons(ETH_P_IPV6) &&
3087 eth_type != htons(ETH_P_ARP) &&
3088 eth_type != htons(ETH_P_RARP) &&
3089 !eth_p_mpls(eth_type)))
3093 if (mac_proto == MAC_PROTO_ETHERNET) {
3094 mpls_label_count = 1;
3095 mac_proto = MAC_PROTO_NONE;
3100 eth_type = mpls->mpls_ethertype;
3104 case OVS_ACTION_ATTR_PUSH_MPLS: {
3105 const struct ovs_action_push_mpls *mpls = nla_data(a);
3107 if (!eth_p_mpls(mpls->mpls_ethertype))
3109 /* Prohibit push MPLS other than to a white list
3110 * for packets that have a known tag order.
3112 if (vlan_tci & htons(VLAN_CFI_MASK) ||
3113 (eth_type != htons(ETH_P_IP) &&
3114 eth_type != htons(ETH_P_IPV6) &&
3115 eth_type != htons(ETH_P_ARP) &&
3116 eth_type != htons(ETH_P_RARP) &&
3117 !eth_p_mpls(eth_type)))
3119 eth_type = mpls->mpls_ethertype;
3124 case OVS_ACTION_ATTR_POP_MPLS: {
3126 if (vlan_tci & htons(VLAN_CFI_MASK) ||
3127 !eth_p_mpls(eth_type))
3130 /* Disallow subsequent L2.5+ set actions and mpls_pop
3131 * actions once the last MPLS label in the packet is
3132 * is popped as there is no check here to ensure that
3133 * the new eth type is valid and thus set actions could
3134 * write off the end of the packet or otherwise corrupt
3137 * Support for these actions is planned using packet
3140 proto = nla_get_be16(a);
3142 if (proto == htons(ETH_P_TEB) &&
3143 mac_proto != MAC_PROTO_NONE)
3148 if (!eth_p_mpls(proto) || !mpls_label_count)
3149 eth_type = htons(0);
3156 case OVS_ACTION_ATTR_SET:
3157 err = validate_set(a, key, sfa,
3158 &skip_copy, mac_proto, eth_type,
3164 case OVS_ACTION_ATTR_SET_MASKED:
3165 err = validate_set(a, key, sfa,
3166 &skip_copy, mac_proto, eth_type,
3172 case OVS_ACTION_ATTR_SAMPLE: {
3173 bool last = nla_is_last(a, rem);
3175 err = validate_and_copy_sample(net, a, key, sfa,
3185 case OVS_ACTION_ATTR_CT:
3186 err = ovs_ct_copy_action(net, a, key, sfa, log);
3192 case OVS_ACTION_ATTR_CT_CLEAR:
3195 case OVS_ACTION_ATTR_PUSH_ETH:
3196 /* Disallow pushing an Ethernet header if one
3197 * is already present */
3198 if (mac_proto != MAC_PROTO_NONE)
3200 mac_proto = MAC_PROTO_ETHERNET;
3203 case OVS_ACTION_ATTR_POP_ETH:
3204 if (mac_proto != MAC_PROTO_ETHERNET)
3206 if (vlan_tci & htons(VLAN_CFI_MASK))
3208 mac_proto = MAC_PROTO_NONE;
3211 case OVS_ACTION_ATTR_PUSH_NSH:
3212 if (mac_proto != MAC_PROTO_ETHERNET) {
3215 next_proto = tun_p_from_eth_p(eth_type);
3219 mac_proto = MAC_PROTO_NONE;
3220 if (!validate_nsh(nla_data(a), false, true, true))
3224 case OVS_ACTION_ATTR_POP_NSH: {
3227 if (eth_type != htons(ETH_P_NSH))
3229 inner_proto = tun_p_to_eth_p(key->nsh.base.np);
3232 if (key->nsh.base.np == TUN_P_ETHERNET)
3233 mac_proto = MAC_PROTO_ETHERNET;
3235 mac_proto = MAC_PROTO_NONE;
3239 case OVS_ACTION_ATTR_METER:
3240 /* Non-existent meters are simply ignored. */
3243 case OVS_ACTION_ATTR_CLONE: {
3244 bool last = nla_is_last(a, rem);
3246 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,
3271 OVS_NLERR(log, "Unknown Action type %d", type);
3275 err = copy_action(a, sfa, log);
3287 /* 'key' must be the masked key. */
3288 int ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
3289 const struct sw_flow_key *key,
3290 struct sw_flow_actions **sfa, bool log)
3293 u32 mpls_label_count = 0;
3295 *sfa = nla_alloc_flow_actions(min(nla_len(attr), MAX_ACTIONS_BUFSIZE));
3297 return PTR_ERR(*sfa);
3299 if (eth_p_mpls(key->eth.type))
3300 mpls_label_count = hweight_long(key->mpls.num_labels_mask);
3302 (*sfa)->orig_len = nla_len(attr);
3303 err = __ovs_nla_copy_actions(net, attr, key, sfa, key->eth.type,
3304 key->eth.vlan.tci, mpls_label_count, log);
3306 ovs_nla_free_flow_actions(*sfa);
3311 static int sample_action_to_attr(const struct nlattr *attr,
3312 struct sk_buff *skb)
3314 struct nlattr *start, *ac_start = NULL, *sample_arg;
3315 int err = 0, rem = nla_len(attr);
3316 const struct sample_arg *arg;
3317 struct nlattr *actions;
3319 start = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_SAMPLE);
3323 sample_arg = nla_data(attr);
3324 arg = nla_data(sample_arg);
3325 actions = nla_next(sample_arg, &rem);
3327 if (nla_put_u32(skb, OVS_SAMPLE_ATTR_PROBABILITY, arg->probability)) {
3332 ac_start = nla_nest_start_noflag(skb, OVS_SAMPLE_ATTR_ACTIONS);
3338 err = ovs_nla_put_actions(actions, rem, skb);
3342 nla_nest_cancel(skb, ac_start);
3343 nla_nest_cancel(skb, start);
3345 nla_nest_end(skb, ac_start);
3346 nla_nest_end(skb, start);
3352 static int clone_action_to_attr(const struct nlattr *attr,
3353 struct sk_buff *skb)
3355 struct nlattr *start;
3356 int err = 0, rem = nla_len(attr);
3358 start = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_CLONE);
3362 err = ovs_nla_put_actions(nla_data(attr), rem, skb);
3365 nla_nest_cancel(skb, start);
3367 nla_nest_end(skb, start);
3372 static int check_pkt_len_action_to_attr(const struct nlattr *attr,
3373 struct sk_buff *skb)
3375 struct nlattr *start, *ac_start = NULL;
3376 const struct check_pkt_len_arg *arg;
3377 const struct nlattr *a, *cpl_arg;
3378 int err = 0, rem = nla_len(attr);
3380 start = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_CHECK_PKT_LEN);
3384 /* The first nested attribute in 'attr' is always
3385 * 'OVS_CHECK_PKT_LEN_ATTR_ARG'.
3387 cpl_arg = nla_data(attr);
3388 arg = nla_data(cpl_arg);
3390 if (nla_put_u16(skb, OVS_CHECK_PKT_LEN_ATTR_PKT_LEN, arg->pkt_len)) {
3395 /* Second nested attribute in 'attr' is always
3396 * 'OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL'.
3398 a = nla_next(cpl_arg, &rem);
3399 ac_start = nla_nest_start_noflag(skb,
3400 OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL);
3406 err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb);
3408 nla_nest_cancel(skb, ac_start);
3411 nla_nest_end(skb, ac_start);
3414 /* Third nested attribute in 'attr' is always
3415 * OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER.
3417 a = nla_next(a, &rem);
3418 ac_start = nla_nest_start_noflag(skb,
3419 OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER);
3425 err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb);
3427 nla_nest_cancel(skb, ac_start);
3430 nla_nest_end(skb, ac_start);
3433 nla_nest_end(skb, start);
3437 nla_nest_cancel(skb, start);
3441 static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb)
3443 const struct nlattr *ovs_key = nla_data(a);
3444 int key_type = nla_type(ovs_key);
3445 struct nlattr *start;
3449 case OVS_KEY_ATTR_TUNNEL_INFO: {
3450 struct ovs_tunnel_info *ovs_tun = nla_data(ovs_key);
3451 struct ip_tunnel_info *tun_info = &ovs_tun->tun_dst->u.tun_info;
3453 start = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_SET);
3457 err = ip_tun_to_nlattr(skb, &tun_info->key,
3458 ip_tunnel_info_opts(tun_info),
3459 tun_info->options_len,
3460 ip_tunnel_info_af(tun_info), tun_info->mode);
3463 nla_nest_end(skb, start);
3467 if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key))
3475 static int masked_set_action_to_set_action_attr(const struct nlattr *a,
3476 struct sk_buff *skb)
3478 const struct nlattr *ovs_key = nla_data(a);
3480 size_t key_len = nla_len(ovs_key) / 2;
3482 /* Revert the conversion we did from a non-masked set action to
3483 * masked set action.
3485 nla = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_SET);
3489 if (nla_put(skb, nla_type(ovs_key), key_len, nla_data(ovs_key)))
3492 nla_nest_end(skb, nla);
3496 int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb)
3498 const struct nlattr *a;
3501 nla_for_each_attr(a, attr, len, rem) {
3502 int type = nla_type(a);
3505 case OVS_ACTION_ATTR_SET:
3506 err = set_action_to_attr(a, skb);
3511 case OVS_ACTION_ATTR_SET_TO_MASKED:
3512 err = masked_set_action_to_set_action_attr(a, skb);
3517 case OVS_ACTION_ATTR_SAMPLE:
3518 err = sample_action_to_attr(a, skb);
3523 case OVS_ACTION_ATTR_CT:
3524 err = ovs_ct_action_to_attr(nla_data(a), skb);
3529 case OVS_ACTION_ATTR_CLONE:
3530 err = clone_action_to_attr(a, skb);
3535 case OVS_ACTION_ATTR_CHECK_PKT_LEN:
3536 err = check_pkt_len_action_to_attr(a, skb);
3542 if (nla_put(skb, type, nla_len(a), nla_data(a)))