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c9422999 1// SPDX-License-Identifier: GPL-2.0-only
e6445719 2/*
798c1661 3 * Copyright (c) 2007-2017 Nicira, Inc.
e6445719
PS		 4 */
5
2235ad1c
JP		 6#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
7
e6445719
PS		 8#include "flow.h"
9#include "datapath.h"
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>
21#include <linux/in.h>
22#include <linux/rcupdate.h>
23#include <linux/if_arp.h>
24#include <linux/ip.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>
f5796684 32#include <net/geneve.h>
e6445719
PS		 33#include <net/ip.h>
34#include <net/ipv6.h>
35#include <net/ndisc.h>
25cd9ba0 36#include <net/mpls.h>
614732ea 37#include <net/vxlan.h>
b2d0f5d5 38#include <net/tun_proto.h>
fc1372f8 39#include <net/erspan.h>
e6445719
PS		 40
41#include "flow_netlink.h"
42
81bfe3c3
TG		 43struct ovs_len_tbl {
44 int len;
45 const struct ovs_len_tbl *next;
46};
47
48#define OVS_ATTR_NESTED -1
982b5270 49#define OVS_ATTR_VARIABLE -2
81bfe3c3 50
798c1661 51static bool actions_may_change_flow(const struct nlattr *actions)
52{
53 struct nlattr *nla;
54 int rem;
55
56 nla_for_each_nested(nla, actions, rem) {
57 u16 action = nla_type(nla);
58
59 switch (action) {
60 case OVS_ACTION_ATTR_OUTPUT:
61 case OVS_ACTION_ATTR_RECIRC:
62 case OVS_ACTION_ATTR_TRUNC:
63 case OVS_ACTION_ATTR_USERSPACE:
64 break;
65
66 case OVS_ACTION_ATTR_CT:
b8226962 67 case OVS_ACTION_ATTR_CT_CLEAR:
798c1661 68 case OVS_ACTION_ATTR_HASH:
69 case OVS_ACTION_ATTR_POP_ETH:
70 case OVS_ACTION_ATTR_POP_MPLS:
b2d0f5d5 71 case OVS_ACTION_ATTR_POP_NSH:
798c1661 72 case OVS_ACTION_ATTR_POP_VLAN:
73 case OVS_ACTION_ATTR_PUSH_ETH:
74 case OVS_ACTION_ATTR_PUSH_MPLS:
b2d0f5d5 75 case OVS_ACTION_ATTR_PUSH_NSH:
798c1661 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:
cd8a6c33 80 case OVS_ACTION_ATTR_METER:
4d5ec89f 81 case OVS_ACTION_ATTR_CHECK_PKT_LEN:
f66b53fd 82 case OVS_ACTION_ATTR_ADD_MPLS:
744676e7 83 case OVS_ACTION_ATTR_DEC_TTL:
798c1661 84 default:
85 return true;
86 }
87 }
88 return false;
89}
90
a85311bf
PS		 91static void update_range(struct sw_flow_match *match,
92 size_t offset, size_t size, bool is_mask)
e6445719 93{
a85311bf 94 struct sw_flow_key_range *range;
e6445719
PS		 95 size_t start = rounddown(offset, sizeof(long));
96 size_t end = roundup(offset + size, sizeof(long));
97
98 if (!is_mask)
99 range = &match->range;
a85311bf 100 else
e6445719
PS		 101 range = &match->mask->range;
102
e6445719
PS		 103 if (range->start == range->end) {
104 range->start = start;
105 range->end = end;
106 return;
107 }
108
109 if (range->start > start)
110 range->start = start;
111
112 if (range->end < end)
113 range->end = end;
114}
115
116#define SW_FLOW_KEY_PUT(match, field, value, is_mask) \
117 do { \
a85311bf
PS		 118 update_range(match, offsetof(struct sw_flow_key, field), \
119 sizeof((match)->key->field), is_mask); \
120 if (is_mask) \
121 (match)->mask->key.field = value; \
122 else \
e6445719 123 (match)->key->field = value; \
e6445719
PS		 124 } while (0)
125
f5796684
JG		 126#define SW_FLOW_KEY_MEMCPY_OFFSET(match, offset, value_p, len, is_mask) \
127 do { \
a85311bf 128 update_range(match, offset, len, is_mask); \
f5796684
JG		 129 if (is_mask) \
130 memcpy((u8 *)&(match)->mask->key + offset, value_p, \
a85311bf 131 len); \
f5796684
JG		 132 else \
133 memcpy((u8 *)(match)->key + offset, value_p, len); \
e6445719
PS		 134 } while (0)
135
f5796684
JG		 136#define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \
137 SW_FLOW_KEY_MEMCPY_OFFSET(match, offsetof(struct sw_flow_key, field), \
138 value_p, len, is_mask)
139
a85311bf
PS		 140#define SW_FLOW_KEY_MEMSET_FIELD(match, field, value, is_mask) \
141 do { \
142 update_range(match, offsetof(struct sw_flow_key, field), \
143 sizeof((match)->key->field), is_mask); \
144 if (is_mask) \
145 memset((u8 *)&(match)->mask->key.field, value, \
146 sizeof((match)->mask->key.field)); \
147 else \
f47de068
PS		 148 memset((u8 *)&(match)->key->field, value, \
149 sizeof((match)->key->field)); \
f47de068 150 } while (0)
e6445719
PS		 151
152static bool match_validate(const struct sw_flow_match *match,
05da5898 153 u64 key_attrs, u64 mask_attrs, bool log)
e6445719 154{
0a6410fb 155 u64 key_expected = 0;
e6445719
PS		 156 u64 mask_allowed = key_attrs; /* At most allow all key attributes */
157
158 /* The following mask attributes allowed only if they
159 * pass the validation tests. */
160 mask_allowed &= ~((1 << OVS_KEY_ATTR_IPV4)
9dd7f890 161 | (1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4)
e6445719 162 | (1 << OVS_KEY_ATTR_IPV6)
9dd7f890 163 | (1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6)
e6445719 164 | (1 << OVS_KEY_ATTR_TCP)
5eb26b15 165 | (1 << OVS_KEY_ATTR_TCP_FLAGS)
e6445719
PS		 166 | (1 << OVS_KEY_ATTR_UDP)
167 | (1 << OVS_KEY_ATTR_SCTP)
168 | (1 << OVS_KEY_ATTR_ICMP)
169 | (1 << OVS_KEY_ATTR_ICMPV6)
170 | (1 << OVS_KEY_ATTR_ARP)
25cd9ba0 171 | (1 << OVS_KEY_ATTR_ND)
b2d0f5d5
YY		 172 | (1 << OVS_KEY_ATTR_MPLS)
173 | (1 << OVS_KEY_ATTR_NSH));
e6445719
PS		 174
175 /* Always allowed mask fields. */
176 mask_allowed |= ((1 << OVS_KEY_ATTR_TUNNEL)
177 | (1 << OVS_KEY_ATTR_IN_PORT)
178 | (1 << OVS_KEY_ATTR_ETHERTYPE));
179
180 /* Check key attributes. */
181 if (match->key->eth.type == htons(ETH_P_ARP)
182 || match->key->eth.type == htons(ETH_P_RARP)) {
183 key_expected |= 1 << OVS_KEY_ATTR_ARP;
f2a01517 184 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
e6445719
PS		 185 mask_allowed |= 1 << OVS_KEY_ATTR_ARP;
186 }
187
25cd9ba0
SH		 188 if (eth_p_mpls(match->key->eth.type)) {
189 key_expected |= 1 << OVS_KEY_ATTR_MPLS;
190 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
191 mask_allowed |= 1 << OVS_KEY_ATTR_MPLS;
192 }
193
e6445719
PS		 194 if (match->key->eth.type == htons(ETH_P_IP)) {
195 key_expected |= 1 << OVS_KEY_ATTR_IPV4;
9dd7f890 196 if (match->mask && match->mask->key.eth.type == htons(0xffff)) {
e6445719 197 mask_allowed |= 1 << OVS_KEY_ATTR_IPV4;
9dd7f890
JR		 198 mask_allowed |= 1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4;
199 }
e6445719
PS		 200
201 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
202 if (match->key->ip.proto == IPPROTO_UDP) {
203 key_expected |= 1 << OVS_KEY_ATTR_UDP;
204 if (match->mask && (match->mask->key.ip.proto == 0xff))
205 mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
206 }
207
208 if (match->key->ip.proto == IPPROTO_SCTP) {
209 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
210 if (match->mask && (match->mask->key.ip.proto == 0xff))
211 mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
212 }
213
214 if (match->key->ip.proto == IPPROTO_TCP) {
215 key_expected |= 1 << OVS_KEY_ATTR_TCP;
5eb26b15
JR		 216 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
217 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
e6445719 218 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
5eb26b15
JR		 219 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
220 }
e6445719
PS		 221 }
222
223 if (match->key->ip.proto == IPPROTO_ICMP) {
224 key_expected |= 1 << OVS_KEY_ATTR_ICMP;
225 if (match->mask && (match->mask->key.ip.proto == 0xff))
226 mask_allowed |= 1 << OVS_KEY_ATTR_ICMP;
227 }
228 }
229 }
230
231 if (match->key->eth.type == htons(ETH_P_IPV6)) {
232 key_expected |= 1 << OVS_KEY_ATTR_IPV6;
9dd7f890 233 if (match->mask && match->mask->key.eth.type == htons(0xffff)) {
e6445719 234 mask_allowed |= 1 << OVS_KEY_ATTR_IPV6;
9dd7f890
JR		 235 mask_allowed |= 1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6;
236 }
e6445719
PS		 237
238 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
239 if (match->key->ip.proto == IPPROTO_UDP) {
240 key_expected |= 1 << OVS_KEY_ATTR_UDP;
241 if (match->mask && (match->mask->key.ip.proto == 0xff))
242 mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
243 }
244
245 if (match->key->ip.proto == IPPROTO_SCTP) {
246 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
247 if (match->mask && (match->mask->key.ip.proto == 0xff))
248 mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
249 }
250
251 if (match->key->ip.proto == IPPROTO_TCP) {
252 key_expected |= 1 << OVS_KEY_ATTR_TCP;
5eb26b15
JR		 253 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
254 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
e6445719 255 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
5eb26b15
JR		 256 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
257 }
e6445719
PS		 258 }
259
260 if (match->key->ip.proto == IPPROTO_ICMPV6) {
261 key_expected |= 1 << OVS_KEY_ATTR_ICMPV6;
262 if (match->mask && (match->mask->key.ip.proto == 0xff))
263 mask_allowed |= 1 << OVS_KEY_ATTR_ICMPV6;
264
1139e241 265 if (match->key->tp.src ==
e6445719 266 htons(NDISC_NEIGHBOUR_SOLICITATION) ||
1139e241 267 match->key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) {
e6445719 268 key_expected |= 1 << OVS_KEY_ATTR_ND;
9dd7f890
JR		 269 /* Original direction conntrack tuple
270 * uses the same space as the ND fields
271 * in the key, so both are not allowed
272 * at the same time.
273 */
274 mask_allowed &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6);
f2a01517 275 if (match->mask && (match->mask->key.tp.src == htons(0xff)))
e6445719
PS		 276 mask_allowed |= 1 << OVS_KEY_ATTR_ND;
277 }
278 }
279 }
280 }
281
b2d0f5d5
YY		 282 if (match->key->eth.type == htons(ETH_P_NSH)) {
283 key_expected |= 1 << OVS_KEY_ATTR_NSH;
284 if (match->mask &&
285 match->mask->key.eth.type == htons(0xffff)) {
286 mask_allowed |= 1 << OVS_KEY_ATTR_NSH;
287 }
288 }
289
e6445719
PS		 290 if ((key_attrs & key_expected) != key_expected) {
291 /* Key attributes check failed. */
05da5898
JR		 292 OVS_NLERR(log, "Missing key (keys=%llx, expected=%llx)",
293 (unsigned long long)key_attrs,
294 (unsigned long long)key_expected);
e6445719
PS		 295 return false;
296 }
297
298 if ((mask_attrs & mask_allowed) != mask_attrs) {
299 /* Mask attributes check failed. */
05da5898
JR		 300 OVS_NLERR(log, "Unexpected mask (mask=%llx, allowed=%llx)",
301 (unsigned long long)mask_attrs,
302 (unsigned long long)mask_allowed);
e6445719
PS		 303 return false;
304 }
305
306 return true;
307}
308
8f0aad6f
WZ		 309size_t ovs_tun_key_attr_size(void)
310{
311 /* Whenever adding new OVS_TUNNEL_KEY_ FIELDS, we should consider
312 * updating this function.
313 */
b46f6ded 314 return nla_total_size_64bit(8) /* OVS_TUNNEL_KEY_ATTR_ID */
6b26ba3a
JB		 315 + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_SRC */
316 + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_DST */
8f0aad6f
WZ		 317 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */
318 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */
319 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */
320 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */
321 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_OAM */
322 + nla_total_size(256) /* OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS */
fc1372f8
WT		 323 /* OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS and
324 * OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS is mutually exclusive with
1dd144cf
TG		 325 * OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS and covered by it.
326 */
8f0aad6f 327 + nla_total_size(2) /* OVS_TUNNEL_KEY_ATTR_TP_SRC */
95a33208 328 + nla_total_size(2); /* OVS_TUNNEL_KEY_ATTR_TP_DST */
8f0aad6f
WZ		 329}
330
06c2351f 331static size_t ovs_nsh_key_attr_size(void)
b2d0f5d5
YY		 332{
333 /* Whenever adding new OVS_NSH_KEY_ FIELDS, we should consider
334 * updating this function.
335 */
336 return nla_total_size(NSH_BASE_HDR_LEN) /* OVS_NSH_KEY_ATTR_BASE */
337 /* OVS_NSH_KEY_ATTR_MD1 and OVS_NSH_KEY_ATTR_MD2 are
338 * mutually exclusive, so the bigger one can cover
339 * the small one.
340 */
341 + nla_total_size(NSH_CTX_HDRS_MAX_LEN);
342}
343
41af73e9
JS		 344size_t ovs_key_attr_size(void)
345{
346 /* Whenever adding new OVS_KEY_ FIELDS, we should consider
347 * updating this function.
348 */
b2d0f5d5 349 BUILD_BUG_ON(OVS_KEY_ATTR_TUNNEL_INFO != 29);
41af73e9
JS		 350
351 return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */
352 + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */
8f0aad6f 353 + ovs_tun_key_attr_size()
41af73e9
JS		 354 + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */
355 + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */
356 + nla_total_size(4) /* OVS_KEY_ATTR_DP_HASH */
357 + nla_total_size(4) /* OVS_KEY_ATTR_RECIRC_ID */
fbccce59 358 + nla_total_size(4) /* OVS_KEY_ATTR_CT_STATE */
7f8a436e 359 + nla_total_size(2) /* OVS_KEY_ATTR_CT_ZONE */
182e3042 360 + nla_total_size(4) /* OVS_KEY_ATTR_CT_MARK */
33db4125 361 + nla_total_size(16) /* OVS_KEY_ATTR_CT_LABELS */
9dd7f890 362 + nla_total_size(40) /* OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6 */
b2d0f5d5
YY		 363 + nla_total_size(0) /* OVS_KEY_ATTR_NSH */
364 + ovs_nsh_key_attr_size()
41af73e9
JS		 365 + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */
366 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
367 + nla_total_size(4) /* OVS_KEY_ATTR_VLAN */
368 + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */
369 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
370 + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */
371 + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */
372 + nla_total_size(28); /* OVS_KEY_ATTR_ND */
373}
374
982b5270
JG		 375static const struct ovs_len_tbl ovs_vxlan_ext_key_lens[OVS_VXLAN_EXT_MAX + 1] = {
376 [OVS_VXLAN_EXT_GBP] = { .len = sizeof(u32) },
377};
378
81bfe3c3
TG		 379static const struct ovs_len_tbl ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = {
380 [OVS_TUNNEL_KEY_ATTR_ID] = { .len = sizeof(u64) },
381 [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = { .len = sizeof(u32) },
382 [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = { .len = sizeof(u32) },
383 [OVS_TUNNEL_KEY_ATTR_TOS] = { .len = 1 },
384 [OVS_TUNNEL_KEY_ATTR_TTL] = { .len = 1 },
385 [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = { .len = 0 },
386 [OVS_TUNNEL_KEY_ATTR_CSUM] = { .len = 0 },
387 [OVS_TUNNEL_KEY_ATTR_TP_SRC] = { .len = sizeof(u16) },
388 [OVS_TUNNEL_KEY_ATTR_TP_DST] = { .len = sizeof(u16) },
389 [OVS_TUNNEL_KEY_ATTR_OAM] = { .len = 0 },
982b5270
JG		 390 [OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS] = { .len = OVS_ATTR_VARIABLE },
391 [OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS] = { .len = OVS_ATTR_NESTED,
392 .next = ovs_vxlan_ext_key_lens },
6b26ba3a
JB		 393 [OVS_TUNNEL_KEY_ATTR_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
394 [OVS_TUNNEL_KEY_ATTR_IPV6_DST] = { .len = sizeof(struct in6_addr) },
fc1372f8 395 [OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS] = { .len = OVS_ATTR_VARIABLE },
18b6f717 396 [OVS_TUNNEL_KEY_ATTR_IPV4_INFO_BRIDGE] = { .len = 0 },
81bfe3c3
TG		 397};
398
b2d0f5d5
YY		 399static const struct ovs_len_tbl
400ovs_nsh_key_attr_lens[OVS_NSH_KEY_ATTR_MAX + 1] = {
401 [OVS_NSH_KEY_ATTR_BASE] = { .len = sizeof(struct ovs_nsh_key_base) },
402 [OVS_NSH_KEY_ATTR_MD1] = { .len = sizeof(struct ovs_nsh_key_md1) },
403 [OVS_NSH_KEY_ATTR_MD2] = { .len = OVS_ATTR_VARIABLE },
404};
405
e6445719 406/* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */
81bfe3c3
TG		 407static const struct ovs_len_tbl ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = {
408 [OVS_KEY_ATTR_ENCAP] = { .len = OVS_ATTR_NESTED },
409 [OVS_KEY_ATTR_PRIORITY] = { .len = sizeof(u32) },
410 [OVS_KEY_ATTR_IN_PORT] = { .len = sizeof(u32) },
411 [OVS_KEY_ATTR_SKB_MARK] = { .len = sizeof(u32) },
412 [OVS_KEY_ATTR_ETHERNET] = { .len = sizeof(struct ovs_key_ethernet) },
413 [OVS_KEY_ATTR_VLAN] = { .len = sizeof(__be16) },
414 [OVS_KEY_ATTR_ETHERTYPE] = { .len = sizeof(__be16) },
415 [OVS_KEY_ATTR_IPV4] = { .len = sizeof(struct ovs_key_ipv4) },
416 [OVS_KEY_ATTR_IPV6] = { .len = sizeof(struct ovs_key_ipv6) },
417 [OVS_KEY_ATTR_TCP] = { .len = sizeof(struct ovs_key_tcp) },
418 [OVS_KEY_ATTR_TCP_FLAGS] = { .len = sizeof(__be16) },
419 [OVS_KEY_ATTR_UDP] = { .len = sizeof(struct ovs_key_udp) },
420 [OVS_KEY_ATTR_SCTP] = { .len = sizeof(struct ovs_key_sctp) },
421 [OVS_KEY_ATTR_ICMP] = { .len = sizeof(struct ovs_key_icmp) },
422 [OVS_KEY_ATTR_ICMPV6] = { .len = sizeof(struct ovs_key_icmpv6) },
423 [OVS_KEY_ATTR_ARP] = { .len = sizeof(struct ovs_key_arp) },
424 [OVS_KEY_ATTR_ND] = { .len = sizeof(struct ovs_key_nd) },
425 [OVS_KEY_ATTR_RECIRC_ID] = { .len = sizeof(u32) },
426 [OVS_KEY_ATTR_DP_HASH] = { .len = sizeof(u32) },
427 [OVS_KEY_ATTR_TUNNEL] = { .len = OVS_ATTR_NESTED,
428 .next = ovs_tunnel_key_lens, },
fbdcdd78 429 [OVS_KEY_ATTR_MPLS] = { .len = OVS_ATTR_VARIABLE },
fbccce59 430 [OVS_KEY_ATTR_CT_STATE] = { .len = sizeof(u32) },
7f8a436e 431 [OVS_KEY_ATTR_CT_ZONE] = { .len = sizeof(u16) },
182e3042 432 [OVS_KEY_ATTR_CT_MARK] = { .len = sizeof(u32) },
33db4125 433 [OVS_KEY_ATTR_CT_LABELS] = { .len = sizeof(struct ovs_key_ct_labels) },
9dd7f890
JR		 434 [OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4] = {
435 .len = sizeof(struct ovs_key_ct_tuple_ipv4) },
436 [OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6] = {
437 .len = sizeof(struct ovs_key_ct_tuple_ipv6) },
b2d0f5d5
YY		 438 [OVS_KEY_ATTR_NSH] = { .len = OVS_ATTR_NESTED,
439 .next = ovs_nsh_key_attr_lens, },
e6445719
PS		 440};
441
982b5270
JG		 442static bool check_attr_len(unsigned int attr_len, unsigned int expected_len)
443{
444 return expected_len == attr_len ||
445 expected_len == OVS_ATTR_NESTED ||
446 expected_len == OVS_ATTR_VARIABLE;
447}
448
e6445719
PS		 449static bool is_all_zero(const u8 *fp, size_t size)
450{
451 int i;
452
453 if (!fp)
454 return false;
455
456 for (i = 0; i < size; i++)
457 if (fp[i])
458 return false;
459
460 return true;
461}
462
463static int __parse_flow_nlattrs(const struct nlattr *attr,
464 const struct nlattr *a[],
05da5898 465 u64 *attrsp, bool log, bool nz)
e6445719
PS		 466{
467 const struct nlattr *nla;
468 u64 attrs;
469 int rem;
470
471 attrs = *attrsp;
472 nla_for_each_nested(nla, attr, rem) {
473 u16 type = nla_type(nla);
474 int expected_len;
475
476 if (type > OVS_KEY_ATTR_MAX) {
05da5898 477 OVS_NLERR(log, "Key type %d is out of range max %d",
e6445719
PS		 478 type, OVS_KEY_ATTR_MAX);
479 return -EINVAL;
480 }
481
482 if (attrs & (1 << type)) {
05da5898 483 OVS_NLERR(log, "Duplicate key (type %d).", type);
e6445719
PS		 484 return -EINVAL;
485 }
486
81bfe3c3 487 expected_len = ovs_key_lens[type].len;
982b5270 488 if (!check_attr_len(nla_len(nla), expected_len)) {
05da5898
JR		 489 OVS_NLERR(log, "Key %d has unexpected len %d expected %d",
490 type, nla_len(nla), expected_len);
e6445719
PS		 491 return -EINVAL;
492 }
493
04a4af33 494 if (!nz || !is_all_zero(nla_data(nla), nla_len(nla))) {
e6445719
PS		 495 attrs |= 1 << type;
496 a[type] = nla;
497 }
498 }
499 if (rem) {
05da5898 500 OVS_NLERR(log, "Message has %d unknown bytes.", rem);
e6445719
PS		 501 return -EINVAL;
502 }
503
504 *attrsp = attrs;
505 return 0;
506}
507
508static int parse_flow_mask_nlattrs(const struct nlattr *attr,
05da5898
JR		 509 const struct nlattr *a[], u64 *attrsp,
510 bool log)
e6445719 511{
05da5898 512 return __parse_flow_nlattrs(attr, a, attrsp, log, true);
e6445719
PS		 513}
514
9dd7f890
JR		 515int parse_flow_nlattrs(const struct nlattr *attr, const struct nlattr *a[],
516 u64 *attrsp, bool log)
e6445719 517{
05da5898
JR		 518 return __parse_flow_nlattrs(attr, a, attrsp, log, false);
519}
520
521static int genev_tun_opt_from_nlattr(const struct nlattr *a,
522 struct sw_flow_match *match, bool is_mask,
523 bool log)
524{
525 unsigned long opt_key_offset;
526
527 if (nla_len(a) > sizeof(match->key->tun_opts)) {
528 OVS_NLERR(log, "Geneve option length err (len %d, max %zu).",
529 nla_len(a), sizeof(match->key->tun_opts));
530 return -EINVAL;
531 }
532
533 if (nla_len(a) % 4 != 0) {
534 OVS_NLERR(log, "Geneve opt len %d is not a multiple of 4.",
535 nla_len(a));
536 return -EINVAL;
537 }
538
539 /* We need to record the length of the options passed
540 * down, otherwise packets with the same format but
541 * additional options will be silently matched.
542 */
543 if (!is_mask) {
544 SW_FLOW_KEY_PUT(match, tun_opts_len, nla_len(a),
545 false);
546 } else {
547 /* This is somewhat unusual because it looks at
548 * both the key and mask while parsing the
549 * attributes (and by extension assumes the key
550 * is parsed first). Normally, we would verify
551 * that each is the correct length and that the
552 * attributes line up in the validate function.
553 * However, that is difficult because this is
554 * variable length and we won't have the
555 * information later.
556 */
557 if (match->key->tun_opts_len != nla_len(a)) {
558 OVS_NLERR(log, "Geneve option len %d != mask len %d",
559 match->key->tun_opts_len, nla_len(a));
560 return -EINVAL;
561 }
562
563 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
564 }
565
d91641d9 566 opt_key_offset = TUN_METADATA_OFFSET(nla_len(a));
05da5898
JR		 567 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, nla_data(a),
568 nla_len(a), is_mask);
569 return 0;
e6445719
PS		 570}
571
982b5270 572static int vxlan_tun_opt_from_nlattr(const struct nlattr *attr,
1dd144cf
TG		 573 struct sw_flow_match *match, bool is_mask,
574 bool log)
575{
982b5270
JG		 576 struct nlattr *a;
577 int rem;
1dd144cf 578 unsigned long opt_key_offset;
614732ea 579 struct vxlan_metadata opts;
1dd144cf
TG		 580
581 BUILD_BUG_ON(sizeof(opts) > sizeof(match->key->tun_opts));
582
1dd144cf 583 memset(&opts, 0, sizeof(opts));
982b5270
JG		 584 nla_for_each_nested(a, attr, rem) {
585 int type = nla_type(a);
1dd144cf 586
982b5270
JG		 587 if (type > OVS_VXLAN_EXT_MAX) {
588 OVS_NLERR(log, "VXLAN extension %d out of range max %d",
589 type, OVS_VXLAN_EXT_MAX);
590 return -EINVAL;
591 }
592
593 if (!check_attr_len(nla_len(a),
594 ovs_vxlan_ext_key_lens[type].len)) {
595 OVS_NLERR(log, "VXLAN extension %d has unexpected len %d expected %d",
596 type, nla_len(a),
597 ovs_vxlan_ext_key_lens[type].len);
598 return -EINVAL;
599 }
600
601 switch (type) {
602 case OVS_VXLAN_EXT_GBP:
603 opts.gbp = nla_get_u32(a);
604 break;
605 default:
606 OVS_NLERR(log, "Unknown VXLAN extension attribute %d",
607 type);
608 return -EINVAL;
609 }
610 }
611 if (rem) {
612 OVS_NLERR(log, "VXLAN extension message has %d unknown bytes.",
613 rem);
614 return -EINVAL;
615 }
1dd144cf
TG		 616
617 if (!is_mask)
618 SW_FLOW_KEY_PUT(match, tun_opts_len, sizeof(opts), false);
619 else
620 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
621
622 opt_key_offset = TUN_METADATA_OFFSET(sizeof(opts));
623 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, &opts, sizeof(opts),
624 is_mask);
625 return 0;
626}
627
fc1372f8
WT		 628static int erspan_tun_opt_from_nlattr(const struct nlattr *a,
629 struct sw_flow_match *match, bool is_mask,
630 bool log)
631{
632 unsigned long opt_key_offset;
633
634 BUILD_BUG_ON(sizeof(struct erspan_metadata) >
635 sizeof(match->key->tun_opts));
636
637 if (nla_len(a) > sizeof(match->key->tun_opts)) {
638 OVS_NLERR(log, "ERSPAN option length err (len %d, max %zu).",
639 nla_len(a), sizeof(match->key->tun_opts));
640 return -EINVAL;
641 }
642
643 if (!is_mask)
644 SW_FLOW_KEY_PUT(match, tun_opts_len,
645 sizeof(struct erspan_metadata), false);
646 else
647 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
648
649 opt_key_offset = TUN_METADATA_OFFSET(nla_len(a));
650 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, nla_data(a),
651 nla_len(a), is_mask);
652 return 0;
653}
654
6b26ba3a
JB		 655static int ip_tun_from_nlattr(const struct nlattr *attr,
656 struct sw_flow_match *match, bool is_mask,
657 bool log)
e6445719 658{
99e28f18 659 bool ttl = false, ipv4 = false, ipv6 = false;
18b6f717 660 bool info_bridge_mode = false;
99e28f18
PS		 661 __be16 tun_flags = 0;
662 int opts_type = 0;
e6445719
PS		 663 struct nlattr *a;
664 int rem;
e6445719
PS		 665
666 nla_for_each_nested(a, attr, rem) {
667 int type = nla_type(a);
05da5898
JR		 668 int err;
669
e6445719 670 if (type > OVS_TUNNEL_KEY_ATTR_MAX) {
05da5898
JR		 671 OVS_NLERR(log, "Tunnel attr %d out of range max %d",
672 type, OVS_TUNNEL_KEY_ATTR_MAX);
e6445719
PS		 673 return -EINVAL;
674 }
675
982b5270
JG		 676 if (!check_attr_len(nla_len(a),
677 ovs_tunnel_key_lens[type].len)) {
05da5898 678 OVS_NLERR(log, "Tunnel attr %d has unexpected len %d expected %d",
81bfe3c3 679 type, nla_len(a), ovs_tunnel_key_lens[type].len);
e6445719
PS		 680 return -EINVAL;
681 }
682
683 switch (type) {
684 case OVS_TUNNEL_KEY_ATTR_ID:
685 SW_FLOW_KEY_PUT(match, tun_key.tun_id,
686 nla_get_be64(a), is_mask);
687 tun_flags |= TUNNEL_KEY;
688 break;
689 case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
c1ea5d67 690 SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.src,
67b61f6c 691 nla_get_in_addr(a), is_mask);
6b26ba3a 692 ipv4 = true;
e6445719
PS		 693 break;
694 case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
c1ea5d67 695 SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.dst,
67b61f6c 696 nla_get_in_addr(a), is_mask);
6b26ba3a
JB		 697 ipv4 = true;
698 break;
699 case OVS_TUNNEL_KEY_ATTR_IPV6_SRC:
3d20f1f7 700 SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.src,
6b26ba3a
JB		 701 nla_get_in6_addr(a), is_mask);
702 ipv6 = true;
703 break;
704 case OVS_TUNNEL_KEY_ATTR_IPV6_DST:
705 SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.dst,
706 nla_get_in6_addr(a), is_mask);
707 ipv6 = true;
e6445719
PS		 708 break;
709 case OVS_TUNNEL_KEY_ATTR_TOS:
7c383fb2 710 SW_FLOW_KEY_PUT(match, tun_key.tos,
e6445719
PS		 711 nla_get_u8(a), is_mask);
712 break;
713 case OVS_TUNNEL_KEY_ATTR_TTL:
7c383fb2 714 SW_FLOW_KEY_PUT(match, tun_key.ttl,
e6445719
PS		 715 nla_get_u8(a), is_mask);
716 ttl = true;
717 break;
718 case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
719 tun_flags |= TUNNEL_DONT_FRAGMENT;
720 break;
721 case OVS_TUNNEL_KEY_ATTR_CSUM:
722 tun_flags |= TUNNEL_CSUM;
723 break;
8f0aad6f
WZ		 724 case OVS_TUNNEL_KEY_ATTR_TP_SRC:
725 SW_FLOW_KEY_PUT(match, tun_key.tp_src,
726 nla_get_be16(a), is_mask);
727 break;
728 case OVS_TUNNEL_KEY_ATTR_TP_DST:
729 SW_FLOW_KEY_PUT(match, tun_key.tp_dst,
730 nla_get_be16(a), is_mask);
731 break;
67fa0341
JG		 732 case OVS_TUNNEL_KEY_ATTR_OAM:
733 tun_flags |= TUNNEL_OAM;
734 break;
f5796684 735 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
1dd144cf
TG		 736 if (opts_type) {
737 OVS_NLERR(log, "Multiple metadata blocks provided");
738 return -EINVAL;
739 }
740
05da5898
JR		 741 err = genev_tun_opt_from_nlattr(a, match, is_mask, log);
742 if (err)
743 return err;
f5796684 744
1dd144cf
TG		 745 tun_flags |= TUNNEL_GENEVE_OPT;
746 opts_type = type;
747 break;
748 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
749 if (opts_type) {
750 OVS_NLERR(log, "Multiple metadata blocks provided");
751 return -EINVAL;
752 }
753
754 err = vxlan_tun_opt_from_nlattr(a, match, is_mask, log);
755 if (err)
756 return err;
757
758 tun_flags |= TUNNEL_VXLAN_OPT;
759 opts_type = type;
f5796684 760 break;
8f3dbfd7
KM		 761 case OVS_TUNNEL_KEY_ATTR_PAD:
762 break;
fc1372f8
WT		 763 case OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS:
764 if (opts_type) {
765 OVS_NLERR(log, "Multiple metadata blocks provided");
766 return -EINVAL;
767 }
768
769 err = erspan_tun_opt_from_nlattr(a, match, is_mask,
770 log);
771 if (err)
772 return err;
773
774 tun_flags |= TUNNEL_ERSPAN_OPT;
775 opts_type = type;
776 break;
18b6f717 777 case OVS_TUNNEL_KEY_ATTR_IPV4_INFO_BRIDGE:
778 info_bridge_mode = true;
779 ipv4 = true;
780 break;
e6445719 781 default:
6b26ba3a 782 OVS_NLERR(log, "Unknown IP tunnel attribute %d",
f5796684 783 type);
e6445719
PS		 784 return -EINVAL;
785 }
786 }
787
788 SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask);
00a93bab
JB		 789 if (is_mask)
790 SW_FLOW_KEY_MEMSET_FIELD(match, tun_proto, 0xff, true);
791 else
6b26ba3a
JB		 792 SW_FLOW_KEY_PUT(match, tun_proto, ipv6 ? AF_INET6 : AF_INET,
793 false);
e6445719
PS		 794
795 if (rem > 0) {
6b26ba3a 796 OVS_NLERR(log, "IP tunnel attribute has %d unknown bytes.",
05da5898 797 rem);
e6445719
PS		 798 return -EINVAL;
799 }
800
6b26ba3a
JB		 801 if (ipv4 && ipv6) {
802 OVS_NLERR(log, "Mixed IPv4 and IPv6 tunnel attributes");
803 return -EINVAL;
804 }
805
e6445719 806 if (!is_mask) {
6b26ba3a
JB		 807 if (!ipv4 && !ipv6) {
808 OVS_NLERR(log, "IP tunnel dst address not specified");
809 return -EINVAL;
810 }
18b6f717 811 if (ipv4) {
812 if (info_bridge_mode) {
813 if (match->key->tun_key.u.ipv4.src ||
814 match->key->tun_key.u.ipv4.dst ||
815 match->key->tun_key.tp_src ||
816 match->key->tun_key.tp_dst ||
817 match->key->tun_key.ttl ||
818 match->key->tun_key.tos ||
819 tun_flags & ~TUNNEL_KEY) {
820 OVS_NLERR(log, "IPv4 tun info is not correct");
821 return -EINVAL;
822 }
823 } else if (!match->key->tun_key.u.ipv4.dst) {
824 OVS_NLERR(log, "IPv4 tunnel dst address is zero");
825 return -EINVAL;
826 }
e6445719 827 }
6b26ba3a
JB		 828 if (ipv6 && ipv6_addr_any(&match->key->tun_key.u.ipv6.dst)) {
829 OVS_NLERR(log, "IPv6 tunnel dst address is zero");
830 return -EINVAL;
831 }
e6445719 832
18b6f717 833 if (!ttl && !info_bridge_mode) {
6b26ba3a 834 OVS_NLERR(log, "IP tunnel TTL not specified.");
e6445719
PS		 835 return -EINVAL;
836 }
837 }
838
1dd144cf
TG		 839 return opts_type;
840}
841
842static int vxlan_opt_to_nlattr(struct sk_buff *skb,
843 const void *tun_opts, int swkey_tun_opts_len)
844{
614732ea 845 const struct vxlan_metadata *opts = tun_opts;
1dd144cf
TG		 846 struct nlattr *nla;
847
ae0be8de 848 nla = nla_nest_start_noflag(skb, OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS);
1dd144cf
TG		 849 if (!nla)
850 return -EMSGSIZE;
851
852 if (nla_put_u32(skb, OVS_VXLAN_EXT_GBP, opts->gbp) < 0)
853 return -EMSGSIZE;
854
855 nla_nest_end(skb, nla);
e6445719
PS		 856 return 0;
857}
858
6b26ba3a
JB		 859static int __ip_tun_to_nlattr(struct sk_buff *skb,
860 const struct ip_tunnel_key *output,
861 const void *tun_opts, int swkey_tun_opts_len,
18b6f717 862 unsigned short tun_proto, u8 mode)
e6445719 863{
e6445719 864 if (output->tun_flags & TUNNEL_KEY &&
b46f6ded
ND		 865 nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id,
866 OVS_TUNNEL_KEY_ATTR_PAD))
e6445719 867 return -EMSGSIZE;
18b6f717 868
869 if (mode & IP_TUNNEL_INFO_BRIDGE)
870 return nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_IPV4_INFO_BRIDGE)
871 ? -EMSGSIZE : 0;
872
6b26ba3a
JB		 873 switch (tun_proto) {
874 case AF_INET:
875 if (output->u.ipv4.src &&
876 nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC,
877 output->u.ipv4.src))
878 return -EMSGSIZE;
879 if (output->u.ipv4.dst &&
880 nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST,
881 output->u.ipv4.dst))
882 return -EMSGSIZE;
883 break;
884 case AF_INET6:
885 if (!ipv6_addr_any(&output->u.ipv6.src) &&
886 nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_SRC,
887 &output->u.ipv6.src))
888 return -EMSGSIZE;
889 if (!ipv6_addr_any(&output->u.ipv6.dst) &&
890 nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_DST,
891 &output->u.ipv6.dst))
892 return -EMSGSIZE;
893 break;
894 }
7c383fb2
JB		 895 if (output->tos &&
896 nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->tos))
e6445719 897 return -EMSGSIZE;
7c383fb2 898 if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ttl))
e6445719
PS		 899 return -EMSGSIZE;
900 if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) &&
67fa0341 901 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT))
e6445719
PS		 902 return -EMSGSIZE;
903 if ((output->tun_flags & TUNNEL_CSUM) &&
67fa0341
JG		 904 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM))
905 return -EMSGSIZE;
8f0aad6f
WZ		 906 if (output->tp_src &&
907 nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_SRC, output->tp_src))
908 return -EMSGSIZE;
909 if (output->tp_dst &&
910 nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_DST, output->tp_dst))
911 return -EMSGSIZE;
67fa0341
JG		 912 if ((output->tun_flags & TUNNEL_OAM) &&
913 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM))
e6445719 914 return -EMSGSIZE;
fc4099f1 915 if (swkey_tun_opts_len) {
1dd144cf
TG		 916 if (output->tun_flags & TUNNEL_GENEVE_OPT &&
917 nla_put(skb, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS,
918 swkey_tun_opts_len, tun_opts))
919 return -EMSGSIZE;
920 else if (output->tun_flags & TUNNEL_VXLAN_OPT &&
921 vxlan_opt_to_nlattr(skb, tun_opts, swkey_tun_opts_len))
922 return -EMSGSIZE;
fc1372f8
WT		 923 else if (output->tun_flags & TUNNEL_ERSPAN_OPT &&
924 nla_put(skb, OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS,
925 swkey_tun_opts_len, tun_opts))
926 return -EMSGSIZE;
1dd144cf 927 }
e6445719 928
e6445719
PS		 929 return 0;
930}
931
6b26ba3a
JB		 932static int ip_tun_to_nlattr(struct sk_buff *skb,
933 const struct ip_tunnel_key *output,
934 const void *tun_opts, int swkey_tun_opts_len,
18b6f717 935 unsigned short tun_proto, u8 mode)
f5796684
JG		 936{
937 struct nlattr *nla;
938 int err;
939
ae0be8de 940 nla = nla_nest_start_noflag(skb, OVS_KEY_ATTR_TUNNEL);
f5796684
JG		 941 if (!nla)
942 return -EMSGSIZE;
943
6b26ba3a 944 err = __ip_tun_to_nlattr(skb, output, tun_opts, swkey_tun_opts_len,
18b6f717 945 tun_proto, mode);
f5796684
JG		 946 if (err)
947 return err;
948
949 nla_nest_end(skb, nla);
950 return 0;
951}
952
fc4099f1
PS		 953int ovs_nla_put_tunnel_info(struct sk_buff *skb,
954 struct ip_tunnel_info *tun_info)
8f0aad6f 955{
ba3e2084
DM		 956 return __ip_tun_to_nlattr(skb, &tun_info->key,
957 ip_tunnel_info_opts(tun_info),
958 tun_info->options_len,
18b6f717 959 ip_tunnel_info_af(tun_info), tun_info->mode);
8f0aad6f
WZ		 960}
961
018c1dda
EG		 962static int encode_vlan_from_nlattrs(struct sw_flow_match *match,
963 const struct nlattr *a[],
964 bool is_mask, bool inner)
965{
966 __be16 tci = 0;
967 __be16 tpid = 0;
968
969 if (a[OVS_KEY_ATTR_VLAN])
970 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
971
972 if (a[OVS_KEY_ATTR_ETHERTYPE])
973 tpid = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
974
975 if (likely(!inner)) {
976 SW_FLOW_KEY_PUT(match, eth.vlan.tpid, tpid, is_mask);
977 SW_FLOW_KEY_PUT(match, eth.vlan.tci, tci, is_mask);
978 } else {
979 SW_FLOW_KEY_PUT(match, eth.cvlan.tpid, tpid, is_mask);
980 SW_FLOW_KEY_PUT(match, eth.cvlan.tci, tci, is_mask);
981 }
982 return 0;
983}
984
985static int validate_vlan_from_nlattrs(const struct sw_flow_match *match,
986 u64 key_attrs, bool inner,
987 const struct nlattr **a, bool log)
988{
989 __be16 tci = 0;
990
991 if (!((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) &&
992 (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) &&
993 eth_type_vlan(nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE])))) {
994 /* Not a VLAN. */
995 return 0;
996 }
997
998 if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) &&
999 (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) {
1000 OVS_NLERR(log, "Invalid %s frame", (inner) ? "C-VLAN" : "VLAN");
1001 return -EINVAL;
1002 }
1003
1004 if (a[OVS_KEY_ATTR_VLAN])
1005 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
1006
9df46aef 1007 if (!(tci & htons(VLAN_CFI_MASK))) {
018c1dda 1008 if (tci) {
9df46aef 1009 OVS_NLERR(log, "%s TCI does not have VLAN_CFI_MASK bit set.",
018c1dda
EG		 1010 (inner) ? "C-VLAN" : "VLAN");
1011 return -EINVAL;
1012 } else if (nla_len(a[OVS_KEY_ATTR_ENCAP])) {
1013 /* Corner case for truncated VLAN header. */
1014 OVS_NLERR(log, "Truncated %s header has non-zero encap attribute.",
1015 (inner) ? "C-VLAN" : "VLAN");
1016 return -EINVAL;
1017 }
1018 }
1019
1020 return 1;
1021}
1022
1023static int validate_vlan_mask_from_nlattrs(const struct sw_flow_match *match,
1024 u64 key_attrs, bool inner,
1025 const struct nlattr **a, bool log)
1026{
1027 __be16 tci = 0;
1028 __be16 tpid = 0;
1029 bool encap_valid = !!(match->key->eth.vlan.tci &
9df46aef 1030 htons(VLAN_CFI_MASK));
018c1dda 1031 bool i_encap_valid = !!(match->key->eth.cvlan.tci &
9df46aef 1032 htons(VLAN_CFI_MASK));
018c1dda
EG		 1033
1034 if (!(key_attrs & (1 << OVS_KEY_ATTR_ENCAP))) {
1035 /* Not a VLAN. */
1036 return 0;
1037 }
1038
1039 if ((!inner && !encap_valid) || (inner && !i_encap_valid)) {
1040 OVS_NLERR(log, "Encap mask attribute is set for non-%s frame.",
1041 (inner) ? "C-VLAN" : "VLAN");
1042 return -EINVAL;
1043 }
1044
1045 if (a[OVS_KEY_ATTR_VLAN])
1046 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
1047
1048 if (a[OVS_KEY_ATTR_ETHERTYPE])
1049 tpid = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
1050
1051 if (tpid != htons(0xffff)) {
1052 OVS_NLERR(log, "Must have an exact match on %s TPID (mask=%x).",
1053 (inner) ? "C-VLAN" : "VLAN", ntohs(tpid));
1054 return -EINVAL;
1055 }
9df46aef
MM		 1056 if (!(tci & htons(VLAN_CFI_MASK))) {
1057 OVS_NLERR(log, "%s TCI mask does not have exact match for VLAN_CFI_MASK bit.",
018c1dda
EG		 1058 (inner) ? "C-VLAN" : "VLAN");
1059 return -EINVAL;
1060 }
1061
1062 return 1;
1063}
1064
1065static int __parse_vlan_from_nlattrs(struct sw_flow_match *match,
1066 u64 *key_attrs, bool inner,
1067 const struct nlattr **a, bool is_mask,
1068 bool log)
1069{
1070 int err;
1071 const struct nlattr *encap;
1072
1073 if (!is_mask)
1074 err = validate_vlan_from_nlattrs(match, *key_attrs, inner,
1075 a, log);
1076 else
1077 err = validate_vlan_mask_from_nlattrs(match, *key_attrs, inner,
1078 a, log);
1079 if (err <= 0)
1080 return err;
1081
1082 err = encode_vlan_from_nlattrs(match, a, is_mask, inner);
1083 if (err)
1084 return err;
1085
1086 *key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP);
1087 *key_attrs &= ~(1 << OVS_KEY_ATTR_VLAN);
1088 *key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
1089
1090 encap = a[OVS_KEY_ATTR_ENCAP];
1091
1092 if (!is_mask)
1093 err = parse_flow_nlattrs(encap, a, key_attrs, log);
1094 else
1095 err = parse_flow_mask_nlattrs(encap, a, key_attrs, log);
1096
1097 return err;
1098}
1099
1100static int parse_vlan_from_nlattrs(struct sw_flow_match *match,
1101 u64 *key_attrs, const struct nlattr **a,
1102 bool is_mask, bool log)
1103{
1104 int err;
1105 bool encap_valid = false;
1106
1107 err = __parse_vlan_from_nlattrs(match, key_attrs, false, a,
1108 is_mask, log);
1109 if (err)
1110 return err;
1111
9df46aef 1112 encap_valid = !!(match->key->eth.vlan.tci & htons(VLAN_CFI_MASK));
018c1dda
EG		 1113 if (encap_valid) {
1114 err = __parse_vlan_from_nlattrs(match, key_attrs, true, a,
1115 is_mask, log);
1116 if (err)
1117 return err;
1118 }
1119
1120 return 0;
1121}
1122
0a6410fb
JB		 1123static int parse_eth_type_from_nlattrs(struct sw_flow_match *match,
1124 u64 *attrs, const struct nlattr **a,
1125 bool is_mask, bool log)
1126{
1127 __be16 eth_type;
1128
1129 eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
1130 if (is_mask) {
1131 /* Always exact match EtherType. */
1132 eth_type = htons(0xffff);
1133 } else if (!eth_proto_is_802_3(eth_type)) {
1134 OVS_NLERR(log, "EtherType %x is less than min %x",
1135 ntohs(eth_type), ETH_P_802_3_MIN);
1136 return -EINVAL;
1137 }
1138
1139 SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask);
1140 *attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
1141 return 0;
1142}
1143
c2ac6673
JS		 1144static int metadata_from_nlattrs(struct net *net, struct sw_flow_match *match,
1145 u64 *attrs, const struct nlattr **a,
1146 bool is_mask, bool log)
e6445719 1147{
0a6410fb
JB		 1148 u8 mac_proto = MAC_PROTO_ETHERNET;
1149
971427f3
AZ		 1150 if (*attrs & (1 << OVS_KEY_ATTR_DP_HASH)) {
1151 u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]);
1152
1153 SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask);
1154 *attrs &= ~(1 << OVS_KEY_ATTR_DP_HASH);
1155 }
1156
1157 if (*attrs & (1 << OVS_KEY_ATTR_RECIRC_ID)) {
1158 u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]);
1159
1160 SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask);
1161 *attrs &= ~(1 << OVS_KEY_ATTR_RECIRC_ID);
1162 }
1163
e6445719
PS		 1164 if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) {
1165 SW_FLOW_KEY_PUT(match, phy.priority,
1166 nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask);
1167 *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY);
1168 }
1169
1170 if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) {
1171 u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]);
1172
426cda5c 1173 if (is_mask) {
e6445719 1174 in_port = 0xffffffff; /* Always exact match in_port. */
426cda5c 1175 } else if (in_port >= DP_MAX_PORTS) {
05da5898 1176 OVS_NLERR(log, "Port %d exceeds max allowable %d",
426cda5c 1177 in_port, DP_MAX_PORTS);
e6445719 1178 return -EINVAL;
426cda5c 1179 }
e6445719
PS		 1180
1181 SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask);
1182 *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT);
1183 } else if (!is_mask) {
1184 SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask);
1185 }
1186
1187 if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) {
1188 uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]);
1189
1190 SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask);
1191 *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK);
1192 }
1193 if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) {
6b26ba3a
JB		 1194 if (ip_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match,
1195 is_mask, log) < 0)
e6445719
PS		 1196 return -EINVAL;
1197 *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL);
1198 }
7f8a436e
JS		 1199
1200 if (*attrs & (1 << OVS_KEY_ATTR_CT_STATE) &&
c2ac6673 1201 ovs_ct_verify(net, OVS_KEY_ATTR_CT_STATE)) {
fbccce59 1202 u32 ct_state = nla_get_u32(a[OVS_KEY_ATTR_CT_STATE]);
7f8a436e 1203
9e384715 1204 if (ct_state & ~CT_SUPPORTED_MASK) {
fbccce59 1205 OVS_NLERR(log, "ct_state flags %08x unsupported",
6f225952
JS		 1206 ct_state);
1207 return -EINVAL;
1208 }
7f8a436e 1209
316d4d78 1210 SW_FLOW_KEY_PUT(match, ct_state, ct_state, is_mask);
7f8a436e
JS		 1211 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_STATE);
1212 }
1213 if (*attrs & (1 << OVS_KEY_ATTR_CT_ZONE) &&
c2ac6673 1214 ovs_ct_verify(net, OVS_KEY_ATTR_CT_ZONE)) {
7f8a436e
JS		 1215 u16 ct_zone = nla_get_u16(a[OVS_KEY_ATTR_CT_ZONE]);
1216
316d4d78 1217 SW_FLOW_KEY_PUT(match, ct_zone, ct_zone, is_mask);
7f8a436e
JS		 1218 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ZONE);
1219 }
182e3042 1220 if (*attrs & (1 << OVS_KEY_ATTR_CT_MARK) &&
c2ac6673 1221 ovs_ct_verify(net, OVS_KEY_ATTR_CT_MARK)) {
182e3042
JS		 1222 u32 mark = nla_get_u32(a[OVS_KEY_ATTR_CT_MARK]);
1223
1224 SW_FLOW_KEY_PUT(match, ct.mark, mark, is_mask);
1225 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_MARK);
1226 }
33db4125
JS		 1227 if (*attrs & (1 << OVS_KEY_ATTR_CT_LABELS) &&
1228 ovs_ct_verify(net, OVS_KEY_ATTR_CT_LABELS)) {
1229 const struct ovs_key_ct_labels *cl;
c2ac6673 1230
33db4125
JS		 1231 cl = nla_data(a[OVS_KEY_ATTR_CT_LABELS]);
1232 SW_FLOW_KEY_MEMCPY(match, ct.labels, cl->ct_labels,
c2ac6673 1233 sizeof(*cl), is_mask);
33db4125 1234 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_LABELS);
c2ac6673 1235 }
9dd7f890
JR		 1236 if (*attrs & (1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4)) {
1237 const struct ovs_key_ct_tuple_ipv4 *ct;
1238
1239 ct = nla_data(a[OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4]);
1240
1241 SW_FLOW_KEY_PUT(match, ipv4.ct_orig.src, ct->ipv4_src, is_mask);
1242 SW_FLOW_KEY_PUT(match, ipv4.ct_orig.dst, ct->ipv4_dst, is_mask);
1243 SW_FLOW_KEY_PUT(match, ct.orig_tp.src, ct->src_port, is_mask);
1244 SW_FLOW_KEY_PUT(match, ct.orig_tp.dst, ct->dst_port, is_mask);
316d4d78 1245 SW_FLOW_KEY_PUT(match, ct_orig_proto, ct->ipv4_proto, is_mask);
9dd7f890
JR		 1246 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4);
1247 }
1248 if (*attrs & (1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6)) {
1249 const struct ovs_key_ct_tuple_ipv6 *ct;
1250
1251 ct = nla_data(a[OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6]);
1252
1253 SW_FLOW_KEY_MEMCPY(match, ipv6.ct_orig.src, &ct->ipv6_src,
1254 sizeof(match->key->ipv6.ct_orig.src),
1255 is_mask);
1256 SW_FLOW_KEY_MEMCPY(match, ipv6.ct_orig.dst, &ct->ipv6_dst,
1257 sizeof(match->key->ipv6.ct_orig.dst),
1258 is_mask);
1259 SW_FLOW_KEY_PUT(match, ct.orig_tp.src, ct->src_port, is_mask);
1260 SW_FLOW_KEY_PUT(match, ct.orig_tp.dst, ct->dst_port, is_mask);
316d4d78 1261 SW_FLOW_KEY_PUT(match, ct_orig_proto, ct->ipv6_proto, is_mask);
9dd7f890
JR		 1262 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6);
1263 }
329f45bc 1264
0a6410fb
JB		 1265 /* For layer 3 packets the Ethernet type is provided
1266 * and treated as metadata but no MAC addresses are provided.
1267 */
1268 if (!(*attrs & (1ULL << OVS_KEY_ATTR_ETHERNET)) &&
1269 (*attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)))
1270 mac_proto = MAC_PROTO_NONE;
1271
329f45bc 1272 /* Always exact match mac_proto */
0a6410fb
JB		 1273 SW_FLOW_KEY_PUT(match, mac_proto, is_mask ? 0xff : mac_proto, is_mask);
1274
1275 if (mac_proto == MAC_PROTO_NONE)
1276 return parse_eth_type_from_nlattrs(match, attrs, a, is_mask,
1277 log);
329f45bc 1278
e6445719
PS		 1279 return 0;
1280}
1281
b2d0f5d5
YY		 1282int nsh_hdr_from_nlattr(const struct nlattr *attr,
1283 struct nshhdr *nh, size_t size)
1284{
1285 struct nlattr *a;
1286 int rem;
1287 u8 flags = 0;
1288 u8 ttl = 0;
1289 int mdlen = 0;
1290
1291 /* validate_nsh has check this, so we needn't do duplicate check here
1292 */
1293 if (size < NSH_BASE_HDR_LEN)
1294 return -ENOBUFS;
1295
1296 nla_for_each_nested(a, attr, rem) {
1297 int type = nla_type(a);
1298
1299 switch (type) {
1300 case OVS_NSH_KEY_ATTR_BASE: {
1301 const struct ovs_nsh_key_base *base = nla_data(a);
1302
1303 flags = base->flags;
1304 ttl = base->ttl;
1305 nh->np = base->np;
1306 nh->mdtype = base->mdtype;
1307 nh->path_hdr = base->path_hdr;
1308 break;
1309 }
1310 case OVS_NSH_KEY_ATTR_MD1:
1311 mdlen = nla_len(a);
1312 if (mdlen > size - NSH_BASE_HDR_LEN)
1313 return -ENOBUFS;
1314 memcpy(&nh->md1, nla_data(a), mdlen);
1315 break;
1316
1317 case OVS_NSH_KEY_ATTR_MD2:
1318 mdlen = nla_len(a);
1319 if (mdlen > size - NSH_BASE_HDR_LEN)
1320 return -ENOBUFS;
1321 memcpy(&nh->md2, nla_data(a), mdlen);
1322 break;
1323
1324 default:
1325 return -EINVAL;
1326 }
1327 }
1328
1329 /* nsh header length = NSH_BASE_HDR_LEN + mdlen */
1330 nh->ver_flags_ttl_len = 0;
1331 nsh_set_flags_ttl_len(nh, flags, ttl, NSH_BASE_HDR_LEN + mdlen);
1332
1333 return 0;
1334}
1335
1336int nsh_key_from_nlattr(const struct nlattr *attr,
1337 struct ovs_key_nsh *nsh, struct ovs_key_nsh *nsh_mask)
1338{
1339 struct nlattr *a;
1340 int rem;
1341
1342 /* validate_nsh has check this, so we needn't do duplicate check here
1343 */
1344 nla_for_each_nested(a, attr, rem) {
1345 int type = nla_type(a);
1346
1347 switch (type) {
1348 case OVS_NSH_KEY_ATTR_BASE: {
1349 const struct ovs_nsh_key_base *base = nla_data(a);
1350 const struct ovs_nsh_key_base *base_mask = base + 1;
1351
1352 nsh->base = *base;
1353 nsh_mask->base = *base_mask;
1354 break;
1355 }
1356 case OVS_NSH_KEY_ATTR_MD1: {
1357 const struct ovs_nsh_key_md1 *md1 = nla_data(a);
1358 const struct ovs_nsh_key_md1 *md1_mask = md1 + 1;
1359
1360 memcpy(nsh->context, md1->context, sizeof(*md1));
1361 memcpy(nsh_mask->context, md1_mask->context,
1362 sizeof(*md1_mask));
1363 break;
1364 }
1365 case OVS_NSH_KEY_ATTR_MD2:
1366 /* Not supported yet */
1367 return -ENOTSUPP;
1368 default:
1369 return -EINVAL;
1370 }
1371 }
1372
1373 return 0;
1374}
1375
1376static int nsh_key_put_from_nlattr(const struct nlattr *attr,
1377 struct sw_flow_match *match, bool is_mask,
1378 bool is_push_nsh, bool log)
1379{
1380 struct nlattr *a;
1381 int rem;
1382 bool has_base = false;
1383 bool has_md1 = false;
1384 bool has_md2 = false;
1385 u8 mdtype = 0;
1386 int mdlen = 0;
1387
1388 if (WARN_ON(is_push_nsh && is_mask))
1389 return -EINVAL;
1390
1391 nla_for_each_nested(a, attr, rem) {
1392 int type = nla_type(a);
1393 int i;
1394
1395 if (type > OVS_NSH_KEY_ATTR_MAX) {
1396 OVS_NLERR(log, "nsh attr %d is out of range max %d",
1397 type, OVS_NSH_KEY_ATTR_MAX);
1398 return -EINVAL;
1399 }
1400
1401 if (!check_attr_len(nla_len(a),
1402 ovs_nsh_key_attr_lens[type].len)) {
1403 OVS_NLERR(
1404 log,
1405 "nsh attr %d has unexpected len %d expected %d",
1406 type,
1407 nla_len(a),
1408 ovs_nsh_key_attr_lens[type].len
1409 );
1410 return -EINVAL;
1411 }
1412
1413 switch (type) {
1414 case OVS_NSH_KEY_ATTR_BASE: {
1415 const struct ovs_nsh_key_base *base = nla_data(a);
1416
1417 has_base = true;
1418 mdtype = base->mdtype;
1419 SW_FLOW_KEY_PUT(match, nsh.base.flags,
1420 base->flags, is_mask);
1421 SW_FLOW_KEY_PUT(match, nsh.base.ttl,
1422 base->ttl, is_mask);
1423 SW_FLOW_KEY_PUT(match, nsh.base.mdtype,
1424 base->mdtype, is_mask);
1425 SW_FLOW_KEY_PUT(match, nsh.base.np,
1426 base->np, is_mask);
1427 SW_FLOW_KEY_PUT(match, nsh.base.path_hdr,
1428 base->path_hdr, is_mask);
1429 break;
1430 }
1431 case OVS_NSH_KEY_ATTR_MD1: {
1432 const struct ovs_nsh_key_md1 *md1 = nla_data(a);
1433
1434 has_md1 = true;
1435 for (i = 0; i < NSH_MD1_CONTEXT_SIZE; i++)
1436 SW_FLOW_KEY_PUT(match, nsh.context[i],
1437 md1->context[i], is_mask);
1438 break;
1439 }
1440 case OVS_NSH_KEY_ATTR_MD2:
1441 if (!is_push_nsh) /* Not supported MD type 2 yet */
1442 return -ENOTSUPP;
1443
1444 has_md2 = true;
1445 mdlen = nla_len(a);
1446 if (mdlen > NSH_CTX_HDRS_MAX_LEN || mdlen <= 0) {
1447 OVS_NLERR(
1448 log,
1449 "Invalid MD length %d for MD type %d",
1450 mdlen,
1451 mdtype
1452 );
1453 return -EINVAL;
1454 }
1455 break;
1456 default:
1457 OVS_NLERR(log, "Unknown nsh attribute %d",
1458 type);
1459 return -EINVAL;
1460 }
1461 }
1462
1463 if (rem > 0) {
1464 OVS_NLERR(log, "nsh attribute has %d unknown bytes.", rem);
1465 return -EINVAL;
1466 }
1467
1468 if (has_md1 && has_md2) {
1469 OVS_NLERR(
1470 1,
1471 "invalid nsh attribute: md1 and md2 are exclusive."
1472 );
1473 return -EINVAL;
1474 }
1475
1476 if (!is_mask) {
1477 if ((has_md1 && mdtype != NSH_M_TYPE1) ||
1478 (has_md2 && mdtype != NSH_M_TYPE2)) {
1479 OVS_NLERR(1, "nsh attribute has unmatched MD type %d.",
1480 mdtype);
1481 return -EINVAL;
1482 }
1483
1484 if (is_push_nsh &&
1485 (!has_base || (!has_md1 && !has_md2))) {
1486 OVS_NLERR(
1487 1,
1488 "push_nsh: missing base or metadata attributes"
1489 );
1490 return -EINVAL;
1491 }
1492 }
1493
1494 return 0;
1495}
1496
c2ac6673
JS		 1497static int ovs_key_from_nlattrs(struct net *net, struct sw_flow_match *match,
1498 u64 attrs, const struct nlattr **a,
1499 bool is_mask, bool log)
e6445719
PS		 1500{
1501 int err;
e6445719 1502
c2ac6673 1503 err = metadata_from_nlattrs(net, match, &attrs, a, is_mask, log);
e6445719
PS		 1504 if (err)
1505 return err;
1506
1507 if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) {
1508 const struct ovs_key_ethernet *eth_key;
1509
1510 eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]);
1511 SW_FLOW_KEY_MEMCPY(match, eth.src,
1512 eth_key->eth_src, ETH_ALEN, is_mask);
1513 SW_FLOW_KEY_MEMCPY(match, eth.dst,
1514 eth_key->eth_dst, ETH_ALEN, is_mask);
1515 attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET);
e6445719 1516
0a6410fb
JB		 1517 if (attrs & (1 << OVS_KEY_ATTR_VLAN)) {
1518 /* VLAN attribute is always parsed before getting here since it
1519 * may occur multiple times.
1520 */
1521 OVS_NLERR(log, "VLAN attribute unexpected.");
e6445719
PS		 1522 return -EINVAL;
1523 }
1524
0a6410fb
JB		 1525 if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) {
1526 err = parse_eth_type_from_nlattrs(match, &attrs, a, is_mask,
1527 log);
1528 if (err)
1529 return err;
1530 } else if (!is_mask) {
1531 SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask);
1532 }
1533 } else if (!match->key->eth.type) {
1534 OVS_NLERR(log, "Either Ethernet header or EtherType is required.");
1535 return -EINVAL;
e6445719
PS		 1536 }
1537
1538 if (attrs & (1 << OVS_KEY_ATTR_IPV4)) {
1539 const struct ovs_key_ipv4 *ipv4_key;
1540
1541 ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]);
1542 if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) {
05da5898
JR		 1543 OVS_NLERR(log, "IPv4 frag type %d is out of range max %d",
1544 ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX);
e6445719
PS		 1545 return -EINVAL;
1546 }
1547 SW_FLOW_KEY_PUT(match, ip.proto,
1548 ipv4_key->ipv4_proto, is_mask);
1549 SW_FLOW_KEY_PUT(match, ip.tos,
1550 ipv4_key->ipv4_tos, is_mask);
1551 SW_FLOW_KEY_PUT(match, ip.ttl,
1552 ipv4_key->ipv4_ttl, is_mask);
1553 SW_FLOW_KEY_PUT(match, ip.frag,
1554 ipv4_key->ipv4_frag, is_mask);
1555 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
1556 ipv4_key->ipv4_src, is_mask);
1557 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
1558 ipv4_key->ipv4_dst, is_mask);
1559 attrs &= ~(1 << OVS_KEY_ATTR_IPV4);
1560 }
1561
1562 if (attrs & (1 << OVS_KEY_ATTR_IPV6)) {
1563 const struct ovs_key_ipv6 *ipv6_key;
1564
1565 ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]);
1566 if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) {
05da5898
JR		 1567 OVS_NLERR(log, "IPv6 frag type %d is out of range max %d",
1568 ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX);
e6445719
PS		 1569 return -EINVAL;
1570 }
fecaef85 1571
d3052bb5 1572 if (!is_mask && ipv6_key->ipv6_label & htonl(0xFFF00000)) {
0ed80da5 1573 OVS_NLERR(log, "IPv6 flow label %x is out of range (max=%x)",
fecaef85
JR		 1574 ntohl(ipv6_key->ipv6_label), (1 << 20) - 1);
1575 return -EINVAL;
1576 }
1577
e6445719
PS		 1578 SW_FLOW_KEY_PUT(match, ipv6.label,
1579 ipv6_key->ipv6_label, is_mask);
1580 SW_FLOW_KEY_PUT(match, ip.proto,
1581 ipv6_key->ipv6_proto, is_mask);
1582 SW_FLOW_KEY_PUT(match, ip.tos,
1583 ipv6_key->ipv6_tclass, is_mask);
1584 SW_FLOW_KEY_PUT(match, ip.ttl,
1585 ipv6_key->ipv6_hlimit, is_mask);
1586 SW_FLOW_KEY_PUT(match, ip.frag,
1587 ipv6_key->ipv6_frag, is_mask);
1588 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src,
1589 ipv6_key->ipv6_src,
1590 sizeof(match->key->ipv6.addr.src),
1591 is_mask);
1592 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst,
1593 ipv6_key->ipv6_dst,
1594 sizeof(match->key->ipv6.addr.dst),
1595 is_mask);
1596
1597 attrs &= ~(1 << OVS_KEY_ATTR_IPV6);
1598 }
1599
1600 if (attrs & (1 << OVS_KEY_ATTR_ARP)) {
1601 const struct ovs_key_arp *arp_key;
1602
1603 arp_key = nla_data(a[OVS_KEY_ATTR_ARP]);
1604 if (!is_mask && (arp_key->arp_op & htons(0xff00))) {
05da5898 1605 OVS_NLERR(log, "Unknown ARP opcode (opcode=%d).",
e6445719
PS		 1606 arp_key->arp_op);
1607 return -EINVAL;
1608 }
1609
1610 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
1611 arp_key->arp_sip, is_mask);
1612 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
1613 arp_key->arp_tip, is_mask);
1614 SW_FLOW_KEY_PUT(match, ip.proto,
1615 ntohs(arp_key->arp_op), is_mask);
1616 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha,
1617 arp_key->arp_sha, ETH_ALEN, is_mask);
1618 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha,
1619 arp_key->arp_tha, ETH_ALEN, is_mask);
1620
1621 attrs &= ~(1 << OVS_KEY_ATTR_ARP);
1622 }
1623
b2d0f5d5
YY		 1624 if (attrs & (1 << OVS_KEY_ATTR_NSH)) {
1625 if (nsh_key_put_from_nlattr(a[OVS_KEY_ATTR_NSH], match,
1626 is_mask, false, log) < 0)
1627 return -EINVAL;
1628 attrs &= ~(1 << OVS_KEY_ATTR_NSH);
1629 }
1630
25cd9ba0
SH		 1631 if (attrs & (1 << OVS_KEY_ATTR_MPLS)) {
1632 const struct ovs_key_mpls *mpls_key;
fbdcdd78
MV		 1633 u32 hdr_len;
1634 u32 label_count, label_count_mask, i;
25cd9ba0
SH		 1635
1636 mpls_key = nla_data(a[OVS_KEY_ATTR_MPLS]);
fbdcdd78
MV		 1637 hdr_len = nla_len(a[OVS_KEY_ATTR_MPLS]);
1638 label_count = hdr_len / sizeof(struct ovs_key_mpls);
1639
1640 if (label_count == 0 || label_count > MPLS_LABEL_DEPTH ||
1641 hdr_len % sizeof(struct ovs_key_mpls))
1642 return -EINVAL;
1643
1644 label_count_mask = GENMASK(label_count - 1, 0);
1645
1646 for (i = 0 ; i < label_count; i++)
1647 SW_FLOW_KEY_PUT(match, mpls.lse[i],
1648 mpls_key[i].mpls_lse, is_mask);
1649
1650 SW_FLOW_KEY_PUT(match, mpls.num_labels_mask,
1651 label_count_mask, is_mask);
25cd9ba0
SH		 1652
1653 attrs &= ~(1 << OVS_KEY_ATTR_MPLS);
1654 }
1655
e6445719
PS		 1656 if (attrs & (1 << OVS_KEY_ATTR_TCP)) {
1657 const struct ovs_key_tcp *tcp_key;
1658
1659 tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]);
1139e241
JR		 1660 SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask);
1661 SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask);
e6445719
PS		 1662 attrs &= ~(1 << OVS_KEY_ATTR_TCP);
1663 }
1664
5eb26b15 1665 if (attrs & (1 << OVS_KEY_ATTR_TCP_FLAGS)) {
1b760fb9
JS		 1666 SW_FLOW_KEY_PUT(match, tp.flags,
1667 nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]),
1668 is_mask);
5eb26b15
JR		 1669 attrs &= ~(1 << OVS_KEY_ATTR_TCP_FLAGS);
1670 }
1671
e6445719
PS		 1672 if (attrs & (1 << OVS_KEY_ATTR_UDP)) {
1673 const struct ovs_key_udp *udp_key;
1674
1675 udp_key = nla_data(a[OVS_KEY_ATTR_UDP]);
1139e241
JR		 1676 SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask);
1677 SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask);
e6445719
PS		 1678 attrs &= ~(1 << OVS_KEY_ATTR_UDP);
1679 }
1680
1681 if (attrs & (1 << OVS_KEY_ATTR_SCTP)) {
1682 const struct ovs_key_sctp *sctp_key;
1683
1684 sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]);
1139e241
JR		 1685 SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask);
1686 SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask);
e6445719
PS		 1687 attrs &= ~(1 << OVS_KEY_ATTR_SCTP);
1688 }
1689
1690 if (attrs & (1 << OVS_KEY_ATTR_ICMP)) {
1691 const struct ovs_key_icmp *icmp_key;
1692
1693 icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]);
1139e241 1694 SW_FLOW_KEY_PUT(match, tp.src,
e6445719 1695 htons(icmp_key->icmp_type), is_mask);
1139e241 1696 SW_FLOW_KEY_PUT(match, tp.dst,
e6445719
PS		 1697 htons(icmp_key->icmp_code), is_mask);
1698 attrs &= ~(1 << OVS_KEY_ATTR_ICMP);
1699 }
1700
1701 if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) {
1702 const struct ovs_key_icmpv6 *icmpv6_key;
1703
1704 icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]);
1139e241 1705 SW_FLOW_KEY_PUT(match, tp.src,
e6445719 1706 htons(icmpv6_key->icmpv6_type), is_mask);
1139e241 1707 SW_FLOW_KEY_PUT(match, tp.dst,
e6445719
PS		 1708 htons(icmpv6_key->icmpv6_code), is_mask);
1709 attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6);
1710 }
1711
1712 if (attrs & (1 << OVS_KEY_ATTR_ND)) {
1713 const struct ovs_key_nd *nd_key;
1714
1715 nd_key = nla_data(a[OVS_KEY_ATTR_ND]);
1716 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target,
1717 nd_key->nd_target,
1718 sizeof(match->key->ipv6.nd.target),
1719 is_mask);
1720 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll,
1721 nd_key->nd_sll, ETH_ALEN, is_mask);
1722 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll,
1723 nd_key->nd_tll, ETH_ALEN, is_mask);
1724 attrs &= ~(1 << OVS_KEY_ATTR_ND);
1725 }
1726
426cda5c 1727 if (attrs != 0) {
05da5898 1728 OVS_NLERR(log, "Unknown key attributes %llx",
426cda5c 1729 (unsigned long long)attrs);
e6445719 1730 return -EINVAL;
426cda5c 1731 }
e6445719
PS		 1732
1733 return 0;
1734}
1735
81bfe3c3
TG		 1736static void nlattr_set(struct nlattr *attr, u8 val,
1737 const struct ovs_len_tbl *tbl)
e6445719 1738{
f47de068
PS		 1739 struct nlattr *nla;
1740 int rem;
e6445719 1741
f47de068
PS		 1742 /* The nlattr stream should already have been validated */
1743 nla_for_each_nested(nla, attr, rem) {
72f17baf
SB		 1744 if (tbl[nla_type(nla)].len == OVS_ATTR_NESTED)
1745 nlattr_set(nla, val, tbl[nla_type(nla)].next ? : tbl);
1746 else
f47de068 1747 memset(nla_data(nla), val, nla_len(nla));
9e384715
JS		 1748
1749 if (nla_type(nla) == OVS_KEY_ATTR_CT_STATE)
1750 *(u32 *)nla_data(nla) &= CT_SUPPORTED_MASK;
f47de068
PS		 1751 }
1752}
1753
1754static void mask_set_nlattr(struct nlattr *attr, u8 val)
1755{
81bfe3c3 1756 nlattr_set(attr, val, ovs_key_lens);
e6445719
PS		 1757}
1758
1759/**
1760 * ovs_nla_get_match - parses Netlink attributes into a flow key and
1761 * mask. In case the 'mask' is NULL, the flow is treated as exact match
1762 * flow. Otherwise, it is treated as a wildcarded flow, except the mask
1763 * does not include any don't care bit.
c2ac6673 1764 * @net: Used to determine per-namespace field support.
e6445719 1765 * @match: receives the extracted flow match information.
96678514 1766 * @nla_key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
e6445719
PS		 1767 * sequence. The fields should of the packet that triggered the creation
1768 * of this flow.
96678514
AL		 1769 * @nla_mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_*
1770 * Netlink attribute specifies the mask field of the wildcarded flow.
05da5898
JR		 1771 * @log: Boolean to allow kernel error logging. Normally true, but when
1772 * probing for feature compatibility this should be passed in as false to
1773 * suppress unnecessary error logging.
e6445719 1774 */
c2ac6673 1775int ovs_nla_get_match(struct net *net, struct sw_flow_match *match,
a85311bf 1776 const struct nlattr *nla_key,
05da5898
JR		 1777 const struct nlattr *nla_mask,
1778 bool log)
e6445719
PS		 1779{
1780 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
f47de068 1781 struct nlattr *newmask = NULL;
e6445719
PS		 1782 u64 key_attrs = 0;
1783 u64 mask_attrs = 0;
e6445719
PS		 1784 int err;
1785
05da5898 1786 err = parse_flow_nlattrs(nla_key, a, &key_attrs, log);
e6445719
PS		 1787 if (err)
1788 return err;
1789
018c1dda
EG		 1790 err = parse_vlan_from_nlattrs(match, &key_attrs, a, false, log);
1791 if (err)
1792 return err;
e6445719 1793
c2ac6673 1794 err = ovs_key_from_nlattrs(net, match, key_attrs, a, false, log);
e6445719
PS		 1795 if (err)
1796 return err;
1797
a85311bf
PS		 1798 if (match->mask) {
1799 if (!nla_mask) {
1800 /* Create an exact match mask. We need to set to 0xff
1801 * all the 'match->mask' fields that have been touched
1802 * in 'match->key'. We cannot simply memset
1803 * 'match->mask', because padding bytes and fields not
1804 * specified in 'match->key' should be left to 0.
1805 * Instead, we use a stream of netlink attributes,
1806 * copied from 'key' and set to 0xff.
1807 * ovs_key_from_nlattrs() will take care of filling
1808 * 'match->mask' appropriately.
1809 */
1810 newmask = kmemdup(nla_key,
1811 nla_total_size(nla_len(nla_key)),
1812 GFP_KERNEL);
1813 if (!newmask)
1814 return -ENOMEM;
f47de068 1815
a85311bf 1816 mask_set_nlattr(newmask, 0xff);
f47de068 1817
a85311bf
PS		 1818 /* The userspace does not send tunnel attributes that
1819 * are 0, but we should not wildcard them nonetheless.
1820 */
00a93bab 1821 if (match->key->tun_proto)
a85311bf
PS		 1822 SW_FLOW_KEY_MEMSET_FIELD(match, tun_key,
1823 0xff, true);
f47de068 1824
a85311bf
PS		 1825 nla_mask = newmask;
1826 }
f47de068 1827
05da5898 1828 err = parse_flow_mask_nlattrs(nla_mask, a, &mask_attrs, log);
e6445719 1829 if (err)
f47de068 1830 goto free_newmask;
e6445719 1831
a85311bf 1832 /* Always match on tci. */
018c1dda
EG		 1833 SW_FLOW_KEY_PUT(match, eth.vlan.tci, htons(0xffff), true);
1834 SW_FLOW_KEY_PUT(match, eth.cvlan.tci, htons(0xffff), true);
e6445719 1835
018c1dda
EG		 1836 err = parse_vlan_from_nlattrs(match, &mask_attrs, a, true, log);
1837 if (err)
1838 goto free_newmask;
e6445719 1839
c2ac6673
JS		 1840 err = ovs_key_from_nlattrs(net, match, mask_attrs, a, true,
1841 log);
e6445719 1842 if (err)
f47de068 1843 goto free_newmask;
e6445719
PS		 1844 }
1845
05da5898 1846 if (!match_validate(match, key_attrs, mask_attrs, log))
f47de068 1847 err = -EINVAL;
e6445719 1848
f47de068
PS		 1849free_newmask:
1850 kfree(newmask);
1851 return err;
e6445719
PS		 1852}
1853
74ed7ab9
JS		 1854static size_t get_ufid_len(const struct nlattr *attr, bool log)
1855{
1856 size_t len;
1857
1858 if (!attr)
1859 return 0;
1860
1861 len = nla_len(attr);
1862 if (len < 1 || len > MAX_UFID_LENGTH) {
1863 OVS_NLERR(log, "ufid size %u bytes exceeds the range (1, %d)",
1864 nla_len(attr), MAX_UFID_LENGTH);
1865 return 0;
1866 }
1867
1868 return len;
1869}
1870
1871/* Initializes 'flow->ufid', returning true if 'attr' contains a valid UFID,
1872 * or false otherwise.
1873 */
1874bool ovs_nla_get_ufid(struct sw_flow_id *sfid, const struct nlattr *attr,
1875 bool log)
1876{
1877 sfid->ufid_len = get_ufid_len(attr, log);
1878 if (sfid->ufid_len)
1879 memcpy(sfid->ufid, nla_data(attr), sfid->ufid_len);
1880
1881 return sfid->ufid_len;
1882}
1883
1884int ovs_nla_get_identifier(struct sw_flow_id *sfid, const struct nlattr *ufid,
1885 const struct sw_flow_key *key, bool log)
1886{
1887 struct sw_flow_key *new_key;
1888
1889 if (ovs_nla_get_ufid(sfid, ufid, log))
1890 return 0;
1891
1892 /* If UFID was not provided, use unmasked key. */
1893 new_key = kmalloc(sizeof(*new_key), GFP_KERNEL);
1894 if (!new_key)
1895 return -ENOMEM;
1896 memcpy(new_key, key, sizeof(*key));
1897 sfid->unmasked_key = new_key;
1898
1899 return 0;
1900}
1901
1902u32 ovs_nla_get_ufid_flags(const struct nlattr *attr)
1903{
1904 return attr ? nla_get_u32(attr) : 0;
1905}
1906
e6445719
PS		 1907/**
1908 * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key.
9dd7f890
JR		 1909 * @net: Network namespace.
1910 * @key: Receives extracted in_port, priority, tun_key, skb_mark and conntrack
1911 * metadata.
1912 * @a: Array of netlink attributes holding parsed %OVS_KEY_ATTR_* Netlink
1913 * attributes.
1914 * @attrs: Bit mask for the netlink attributes included in @a.
05da5898
JR		 1915 * @log: Boolean to allow kernel error logging. Normally true, but when
1916 * probing for feature compatibility this should be passed in as false to
1917 * suppress unnecessary error logging.
e6445719
PS		 1918 *
1919 * This parses a series of Netlink attributes that form a flow key, which must
1920 * take the same form accepted by flow_from_nlattrs(), but only enough of it to
1921 * get the metadata, that is, the parts of the flow key that cannot be
1922 * extracted from the packet itself.
9dd7f890
JR		 1923 *
1924 * This must be called before the packet key fields are filled in 'key'.
e6445719
PS		 1925 */
1926
9dd7f890
JR		 1927int ovs_nla_get_flow_metadata(struct net *net,
1928 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1],
1929 u64 attrs, struct sw_flow_key *key, bool log)
e6445719 1930{
83c8df26 1931 struct sw_flow_match match;
e6445719
PS		 1932
1933 memset(&match, 0, sizeof(match));
83c8df26 1934 match.key = key;
e6445719 1935
316d4d78
JR		 1936 key->ct_state = 0;
1937 key->ct_zone = 0;
1938 key->ct_orig_proto = 0;
7f8a436e 1939 memset(&key->ct, 0, sizeof(key->ct));
9dd7f890
JR		 1940 memset(&key->ipv4.ct_orig, 0, sizeof(key->ipv4.ct_orig));
1941 memset(&key->ipv6.ct_orig, 0, sizeof(key->ipv6.ct_orig));
1942
83c8df26 1943 key->phy.in_port = DP_MAX_PORTS;
e6445719 1944
c2ac6673 1945 return metadata_from_nlattrs(net, &match, &attrs, a, false, log);
e6445719
PS		 1946}
1947
018c1dda
EG		 1948static int ovs_nla_put_vlan(struct sk_buff *skb, const struct vlan_head *vh,
1949 bool is_mask)
1950{
1951 __be16 eth_type = !is_mask ? vh->tpid : htons(0xffff);
1952
1953 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) ||
1954 nla_put_be16(skb, OVS_KEY_ATTR_VLAN, vh->tci))
1955 return -EMSGSIZE;
1956 return 0;
1957}
1958
b2d0f5d5
YY		 1959static int nsh_key_to_nlattr(const struct ovs_key_nsh *nsh, bool is_mask,
1960 struct sk_buff *skb)
1961{
1962 struct nlattr *start;
1963
ae0be8de 1964 start = nla_nest_start_noflag(skb, OVS_KEY_ATTR_NSH);
b2d0f5d5
YY		 1965 if (!start)
1966 return -EMSGSIZE;
1967
1968 if (nla_put(skb, OVS_NSH_KEY_ATTR_BASE, sizeof(nsh->base), &nsh->base))
1969 goto nla_put_failure;
1970
1971 if (is_mask || nsh->base.mdtype == NSH_M_TYPE1) {
1972 if (nla_put(skb, OVS_NSH_KEY_ATTR_MD1,
1973 sizeof(nsh->context), nsh->context))
1974 goto nla_put_failure;
1975 }
1976
1977 /* Don't support MD type 2 yet */
1978
1979 nla_nest_end(skb, start);
1980
1981 return 0;
1982
1983nla_put_failure:
1984 return -EMSGSIZE;
1985}
1986
5b4237bb
JS		 1987static int __ovs_nla_put_key(const struct sw_flow_key *swkey,
1988 const struct sw_flow_key *output, bool is_mask,
1989 struct sk_buff *skb)
e6445719
PS		 1990{
1991 struct ovs_key_ethernet *eth_key;
018c1dda
EG		 1992 struct nlattr *nla;
1993 struct nlattr *encap = NULL;
1994 struct nlattr *in_encap = NULL;
e6445719 1995
971427f3
AZ		 1996 if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id))
1997 goto nla_put_failure;
1998
1999 if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash))
2000 goto nla_put_failure;
2001
e6445719
PS		 2002 if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority))
2003 goto nla_put_failure;
2004
00a93bab 2005 if ((swkey->tun_proto || is_mask)) {
d91641d9 2006 const void *opts = NULL;
f5796684
JG		 2007
2008 if (output->tun_key.tun_flags & TUNNEL_OPTIONS_PRESENT)
d91641d9 2009 opts = TUN_METADATA_OPTS(output, swkey->tun_opts_len);
f5796684 2010
6b26ba3a 2011 if (ip_tun_to_nlattr(skb, &output->tun_key, opts,
18b6f717 2012 swkey->tun_opts_len, swkey->tun_proto, 0))
f5796684
JG		 2013 goto nla_put_failure;
2014 }
e6445719
PS		 2015
2016 if (swkey->phy.in_port == DP_MAX_PORTS) {
2017 if (is_mask && (output->phy.in_port == 0xffff))
2018 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff))
2019 goto nla_put_failure;
2020 } else {
2021 u16 upper_u16;
2022 upper_u16 = !is_mask ? 0 : 0xffff;
2023
2024 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT,
2025 (upper_u16 << 16) | output->phy.in_port))
2026 goto nla_put_failure;
2027 }
2028
2029 if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark))
2030 goto nla_put_failure;
2031
9dd7f890 2032 if (ovs_ct_put_key(swkey, output, skb))
7f8a436e
JS		 2033 goto nla_put_failure;
2034
0a6410fb
JB		 2035 if (ovs_key_mac_proto(swkey) == MAC_PROTO_ETHERNET) {
2036 nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key));
2037 if (!nla)
e6445719 2038 goto nla_put_failure;
018c1dda 2039
0a6410fb
JB		 2040 eth_key = nla_data(nla);
2041 ether_addr_copy(eth_key->eth_src, output->eth.src);
2042 ether_addr_copy(eth_key->eth_dst, output->eth.dst);
2043
2044 if (swkey->eth.vlan.tci || eth_type_vlan(swkey->eth.type)) {
2045 if (ovs_nla_put_vlan(skb, &output->eth.vlan, is_mask))
018c1dda 2046 goto nla_put_failure;
ae0be8de 2047 encap = nla_nest_start_noflag(skb, OVS_KEY_ATTR_ENCAP);
0a6410fb 2048 if (!swkey->eth.vlan.tci)
018c1dda 2049 goto unencap;
0a6410fb
JB		 2050
2051 if (swkey->eth.cvlan.tci || eth_type_vlan(swkey->eth.type)) {
2052 if (ovs_nla_put_vlan(skb, &output->eth.cvlan, is_mask))
2053 goto nla_put_failure;
ae0be8de
MK		 2054 in_encap = nla_nest_start_noflag(skb,
2055 OVS_KEY_ATTR_ENCAP);
0a6410fb
JB		 2056 if (!swkey->eth.cvlan.tci)
2057 goto unencap;
2058 }
018c1dda 2059 }
e6445719 2060
0a6410fb
JB		 2061 if (swkey->eth.type == htons(ETH_P_802_2)) {
2062 /*
2063 * Ethertype 802.2 is represented in the netlink with omitted
2064 * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and
2065 * 0xffff in the mask attribute. Ethertype can also
2066 * be wildcarded.
2067 */
2068 if (is_mask && output->eth.type)
2069 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE,
2070 output->eth.type))
2071 goto nla_put_failure;
2072 goto unencap;
2073 }
e6445719
PS		 2074 }
2075
2076 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type))
2077 goto nla_put_failure;
2078
018c1dda
EG		 2079 if (eth_type_vlan(swkey->eth.type)) {
2080 /* There are 3 VLAN tags, we don't know anything about the rest
2081 * of the packet, so truncate here.
2082 */
2083 WARN_ON_ONCE(!(encap && in_encap));
2084 goto unencap;
2085 }
2086
e6445719
PS		 2087 if (swkey->eth.type == htons(ETH_P_IP)) {
2088 struct ovs_key_ipv4 *ipv4_key;
2089
2090 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key));
2091 if (!nla)
2092 goto nla_put_failure;
2093 ipv4_key = nla_data(nla);
2094 ipv4_key->ipv4_src = output->ipv4.addr.src;
2095 ipv4_key->ipv4_dst = output->ipv4.addr.dst;
2096 ipv4_key->ipv4_proto = output->ip.proto;
2097 ipv4_key->ipv4_tos = output->ip.tos;
2098 ipv4_key->ipv4_ttl = output->ip.ttl;
2099 ipv4_key->ipv4_frag = output->ip.frag;
2100 } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
2101 struct ovs_key_ipv6 *ipv6_key;
2102
2103 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key));
2104 if (!nla)
2105 goto nla_put_failure;
2106 ipv6_key = nla_data(nla);
2107 memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src,
2108 sizeof(ipv6_key->ipv6_src));
2109 memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst,
2110 sizeof(ipv6_key->ipv6_dst));
2111 ipv6_key->ipv6_label = output->ipv6.label;
2112 ipv6_key->ipv6_proto = output->ip.proto;
2113 ipv6_key->ipv6_tclass = output->ip.tos;
2114 ipv6_key->ipv6_hlimit = output->ip.ttl;
2115 ipv6_key->ipv6_frag = output->ip.frag;
b2d0f5d5
YY		 2116 } else if (swkey->eth.type == htons(ETH_P_NSH)) {
2117 if (nsh_key_to_nlattr(&output->nsh, is_mask, skb))
2118 goto nla_put_failure;
e6445719
PS		 2119 } else if (swkey->eth.type == htons(ETH_P_ARP) ||
2120 swkey->eth.type == htons(ETH_P_RARP)) {
2121 struct ovs_key_arp *arp_key;
2122
2123 nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key));
2124 if (!nla)
2125 goto nla_put_failure;
2126 arp_key = nla_data(nla);
2127 memset(arp_key, 0, sizeof(struct ovs_key_arp));
2128 arp_key->arp_sip = output->ipv4.addr.src;
2129 arp_key->arp_tip = output->ipv4.addr.dst;
2130 arp_key->arp_op = htons(output->ip.proto);
8c63ff09
JP		 2131 ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha);
2132 ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha);
25cd9ba0 2133 } else if (eth_p_mpls(swkey->eth.type)) {
fbdcdd78 2134 u8 i, num_labels;
25cd9ba0
SH		 2135 struct ovs_key_mpls *mpls_key;
2136
fbdcdd78
MV		 2137 num_labels = hweight_long(output->mpls.num_labels_mask);
2138 nla = nla_reserve(skb, OVS_KEY_ATTR_MPLS,
2139 num_labels * sizeof(*mpls_key));
25cd9ba0
SH		 2140 if (!nla)
2141 goto nla_put_failure;
fbdcdd78 2142
25cd9ba0 2143 mpls_key = nla_data(nla);
fbdcdd78
MV		 2144 for (i = 0; i < num_labels; i++)
2145 mpls_key[i].mpls_lse = output->mpls.lse[i];
e6445719
PS		 2146 }
2147
2148 if ((swkey->eth.type == htons(ETH_P_IP) ||
2149 swkey->eth.type == htons(ETH_P_IPV6)) &&
2150 swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
2151
2152 if (swkey->ip.proto == IPPROTO_TCP) {
2153 struct ovs_key_tcp *tcp_key;
2154
2155 nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key));
2156 if (!nla)
2157 goto nla_put_failure;
2158 tcp_key = nla_data(nla);
1139e241
JR		 2159 tcp_key->tcp_src = output->tp.src;
2160 tcp_key->tcp_dst = output->tp.dst;
2161 if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS,
2162 output->tp.flags))
2163 goto nla_put_failure;
e6445719
PS		 2164 } else if (swkey->ip.proto == IPPROTO_UDP) {
2165 struct ovs_key_udp *udp_key;
2166
2167 nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key));
2168 if (!nla)
2169 goto nla_put_failure;
2170 udp_key = nla_data(nla);
1139e241
JR		 2171 udp_key->udp_src = output->tp.src;
2172 udp_key->udp_dst = output->tp.dst;
e6445719
PS		 2173 } else if (swkey->ip.proto == IPPROTO_SCTP) {
2174 struct ovs_key_sctp *sctp_key;
2175
2176 nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key));
2177 if (!nla)
2178 goto nla_put_failure;
2179 sctp_key = nla_data(nla);
1139e241
JR		 2180 sctp_key->sctp_src = output->tp.src;
2181 sctp_key->sctp_dst = output->tp.dst;
e6445719
PS		 2182 } else if (swkey->eth.type == htons(ETH_P_IP) &&
2183 swkey->ip.proto == IPPROTO_ICMP) {
2184 struct ovs_key_icmp *icmp_key;
2185
2186 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key));
2187 if (!nla)
2188 goto nla_put_failure;
2189 icmp_key = nla_data(nla);
1139e241
JR		 2190 icmp_key->icmp_type = ntohs(output->tp.src);
2191 icmp_key->icmp_code = ntohs(output->tp.dst);
e6445719
PS		 2192 } else if (swkey->eth.type == htons(ETH_P_IPV6) &&
2193 swkey->ip.proto == IPPROTO_ICMPV6) {
2194 struct ovs_key_icmpv6 *icmpv6_key;
2195
2196 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6,
2197 sizeof(*icmpv6_key));
2198 if (!nla)
2199 goto nla_put_failure;
2200 icmpv6_key = nla_data(nla);
1139e241
JR		 2201 icmpv6_key->icmpv6_type = ntohs(output->tp.src);
2202 icmpv6_key->icmpv6_code = ntohs(output->tp.dst);
e6445719
PS		 2203
2204 if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION ||
2205 icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) {
2206 struct ovs_key_nd *nd_key;
2207
2208 nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key));
2209 if (!nla)
2210 goto nla_put_failure;
2211 nd_key = nla_data(nla);
2212 memcpy(nd_key->nd_target, &output->ipv6.nd.target,
2213 sizeof(nd_key->nd_target));
8c63ff09
JP		 2214 ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll);
2215 ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll);
e6445719
PS		 2216 }
2217 }
2218 }
2219
2220unencap:
018c1dda
EG		 2221 if (in_encap)
2222 nla_nest_end(skb, in_encap);
e6445719
PS		 2223 if (encap)
2224 nla_nest_end(skb, encap);
2225
2226 return 0;
2227
2228nla_put_failure:
2229 return -EMSGSIZE;
2230}
2231
5b4237bb
JS		 2232int ovs_nla_put_key(const struct sw_flow_key *swkey,
2233 const struct sw_flow_key *output, int attr, bool is_mask,
2234 struct sk_buff *skb)
2235{
2236 int err;
2237 struct nlattr *nla;
2238
ae0be8de 2239 nla = nla_nest_start_noflag(skb, attr);
5b4237bb
JS		 2240 if (!nla)
2241 return -EMSGSIZE;
2242 err = __ovs_nla_put_key(swkey, output, is_mask, skb);
2243 if (err)
2244 return err;
2245 nla_nest_end(skb, nla);
2246
2247 return 0;
2248}
2249
2250/* Called with ovs_mutex or RCU read lock. */
74ed7ab9
JS		 2251int ovs_nla_put_identifier(const struct sw_flow *flow, struct sk_buff *skb)
2252{
2253 if (ovs_identifier_is_ufid(&flow->id))
2254 return nla_put(skb, OVS_FLOW_ATTR_UFID, flow->id.ufid_len,
2255 flow->id.ufid);
2256
2257 return ovs_nla_put_key(flow->id.unmasked_key, flow->id.unmasked_key,
2258 OVS_FLOW_ATTR_KEY, false, skb);
2259}
2260
2261/* Called with ovs_mutex or RCU read lock. */
2262int ovs_nla_put_masked_key(const struct sw_flow *flow, struct sk_buff *skb)
5b4237bb 2263{
26ad0b83 2264 return ovs_nla_put_key(&flow->key, &flow->key,
5b4237bb
JS		 2265 OVS_FLOW_ATTR_KEY, false, skb);
2266}
2267
2268/* Called with ovs_mutex or RCU read lock. */
2269int ovs_nla_put_mask(const struct sw_flow *flow, struct sk_buff *skb)
2270{
2271 return ovs_nla_put_key(&flow->key, &flow->mask->key,
2272 OVS_FLOW_ATTR_MASK, true, skb);
2273}
2274
e6445719
PS		 2275#define MAX_ACTIONS_BUFSIZE (32 * 1024)
2276
67c8d22a 2277static struct sw_flow_actions *nla_alloc_flow_actions(int size)
e6445719
PS		 2278{
2279 struct sw_flow_actions *sfa;
2280
67c8d22a 2281 WARN_ON_ONCE(size > MAX_ACTIONS_BUFSIZE);
e6445719
PS		 2282
2283 sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL);
2284 if (!sfa)
2285 return ERR_PTR(-ENOMEM);
2286
2287 sfa->actions_len = 0;
2288 return sfa;
2289}
2290
34ae932a
TG		 2291static void ovs_nla_free_set_action(const struct nlattr *a)
2292{
2293 const struct nlattr *ovs_key = nla_data(a);
2294 struct ovs_tunnel_info *ovs_tun;
2295
2296 switch (nla_type(ovs_key)) {
2297 case OVS_KEY_ATTR_TUNNEL_INFO:
2298 ovs_tun = nla_data(ovs_key);
2299 dst_release((struct dst_entry *)ovs_tun->tun_dst);
2300 break;
2301 }
2302}
2303
2304void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts)
2305{
2306 const struct nlattr *a;
2307 int rem;
2308
2309 if (!sf_acts)
2310 return;
2311
2312 nla_for_each_attr(a, sf_acts->actions, sf_acts->actions_len, rem) {
2313 switch (nla_type(a)) {
2314 case OVS_ACTION_ATTR_SET:
2315 ovs_nla_free_set_action(a);
2316 break;
7f8a436e
JS		 2317 case OVS_ACTION_ATTR_CT:
2318 ovs_ct_free_action(a);
2319 break;
34ae932a
TG		 2320 }
2321 }
2322
2323 kfree(sf_acts);
2324}
2325
2326static void __ovs_nla_free_flow_actions(struct rcu_head *head)
2327{
2328 ovs_nla_free_flow_actions(container_of(head, struct sw_flow_actions, rcu));
2329}
2330
e6445719
PS		 2331/* Schedules 'sf_acts' to be freed after the next RCU grace period.
2332 * The caller must hold rcu_read_lock for this to be sensible. */
34ae932a 2333void ovs_nla_free_flow_actions_rcu(struct sw_flow_actions *sf_acts)
e6445719 2334{
34ae932a 2335 call_rcu(&sf_acts->rcu, __ovs_nla_free_flow_actions);
e6445719
PS		 2336}
2337
2338static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa,
05da5898 2339 int attr_len, bool log)
e6445719
PS		 2340{
2341
2342 struct sw_flow_actions *acts;
2343 int new_acts_size;
f28cd2af 2344 size_t req_size = NLA_ALIGN(attr_len);
e6445719
PS		 2345 int next_offset = offsetof(struct sw_flow_actions, actions) +
2346 (*sfa)->actions_len;
2347
2348 if (req_size <= (ksize(*sfa) - next_offset))
2349 goto out;
2350
f28cd2af 2351 new_acts_size = max(next_offset + req_size, ksize(*sfa) * 2);
e6445719
PS		 2352
2353 if (new_acts_size > MAX_ACTIONS_BUFSIZE) {
67c8d22a 2354 if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size) {
2355 OVS_NLERR(log, "Flow action size exceeds max %u",
2356 MAX_ACTIONS_BUFSIZE);
e6445719 2357 return ERR_PTR(-EMSGSIZE);
67c8d22a 2358 }
e6445719
PS		 2359 new_acts_size = MAX_ACTIONS_BUFSIZE;
2360 }
2361
67c8d22a 2362 acts = nla_alloc_flow_actions(new_acts_size);
e6445719
PS		 2363 if (IS_ERR(acts))
2364 return (void *)acts;
2365
2366 memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len);
2367 acts->actions_len = (*sfa)->actions_len;
8e2fed1c 2368 acts->orig_len = (*sfa)->orig_len;
e6445719
PS		 2369 kfree(*sfa);
2370 *sfa = acts;
2371
2372out:
2373 (*sfa)->actions_len += req_size;
2374 return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset);
2375}
2376
f0b128c1 2377static struct nlattr *__add_action(struct sw_flow_actions **sfa,
05da5898 2378 int attrtype, void *data, int len, bool log)
e6445719
PS		 2379{
2380 struct nlattr *a;
2381
05da5898 2382 a = reserve_sfa_size(sfa, nla_attr_size(len), log);
e6445719 2383 if (IS_ERR(a))
f0b128c1 2384 return a;
e6445719
PS		 2385
2386 a->nla_type = attrtype;
2387 a->nla_len = nla_attr_size(len);
2388
2389 if (data)
2390 memcpy(nla_data(a), data, len);
2391 memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len));
2392
f0b128c1
JG		 2393 return a;
2394}
2395
7f8a436e
JS		 2396int ovs_nla_add_action(struct sw_flow_actions **sfa, int attrtype, void *data,
2397 int len, bool log)
f0b128c1
JG		 2398{
2399 struct nlattr *a;
2400
05da5898 2401 a = __add_action(sfa, attrtype, data, len, log);
f0b128c1 2402
f35423c1 2403 return PTR_ERR_OR_ZERO(a);
e6445719
PS		 2404}
2405
2406static inline int add_nested_action_start(struct sw_flow_actions **sfa,
05da5898 2407 int attrtype, bool log)
e6445719
PS		 2408{
2409 int used = (*sfa)->actions_len;
2410 int err;
2411
7f8a436e 2412 err = ovs_nla_add_action(sfa, attrtype, NULL, 0, log);
e6445719
PS		 2413 if (err)
2414 return err;
2415
2416 return used;
2417}
2418
2419static inline void add_nested_action_end(struct sw_flow_actions *sfa,
2420 int st_offset)
2421{
2422 struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions +
2423 st_offset);
2424
2425 a->nla_len = sfa->actions_len - st_offset;
2426}
2427
7f8a436e 2428static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
25cd9ba0 2429 const struct sw_flow_key *key,
798c1661 2430 struct sw_flow_actions **sfa,
fbdcdd78
MV		 2431 __be16 eth_type, __be16 vlan_tci,
2432 u32 mpls_label_count, bool log);
25cd9ba0 2433
7f8a436e 2434static int validate_and_copy_sample(struct net *net, const struct nlattr *attr,
798c1661 2435 const struct sw_flow_key *key,
25cd9ba0 2436 struct sw_flow_actions **sfa,
798c1661 2437 __be16 eth_type, __be16 vlan_tci,
fbdcdd78 2438 u32 mpls_label_count, bool log, bool last)
e6445719
PS		 2439{
2440 const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];
2441 const struct nlattr *probability, *actions;
2442 const struct nlattr *a;
798c1661 2443 int rem, start, err;
2444 struct sample_arg arg;
e6445719
PS		 2445
2446 memset(attrs, 0, sizeof(attrs));
2447 nla_for_each_nested(a, attr, rem) {
2448 int type = nla_type(a);
2449 if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type])
2450 return -EINVAL;
2451 attrs[type] = a;
2452 }
2453 if (rem)
2454 return -EINVAL;
2455
2456 probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY];
2457 if (!probability || nla_len(probability) != sizeof(u32))
2458 return -EINVAL;
2459
2460 actions = attrs[OVS_SAMPLE_ATTR_ACTIONS];
2461 if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN))
2462 return -EINVAL;
2463
2464 /* validation done, copy sample action. */
05da5898 2465 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE, log);
e6445719
PS		 2466 if (start < 0)
2467 return start;
798c1661 2468
2469 /* When both skb and flow may be changed, put the sample
2470 * into a deferred fifo. On the other hand, if only skb
2471 * may be modified, the actions can be executed in place.
2472 *
2473 * Do this analysis at the flow installation time.
2474 * Set 'clone_action->exec' to true if the actions can be
2475 * executed without being deferred.
2476 *
2477 * If the sample is the last action, it can always be excuted
2478 * rather than deferred.
2479 */
2480 arg.exec = last || !actions_may_change_flow(actions);
2481 arg.probability = nla_get_u32(probability);
2482
2483 err = ovs_nla_add_action(sfa, OVS_SAMPLE_ATTR_ARG, &arg, sizeof(arg),
2484 log);
e6445719
PS		 2485 if (err)
2486 return err;
e6445719 2487
798c1661 2488 err = __ovs_nla_copy_actions(net, actions, key, sfa,
fbdcdd78 2489 eth_type, vlan_tci, mpls_label_count, log);
798c1661 2490
e6445719
PS		 2491 if (err)
2492 return err;
2493
e6445719
PS		 2494 add_nested_action_end(*sfa, start);
2495
2496 return 0;
2497}
2498
744676e7
MC		 2499static int validate_and_copy_dec_ttl(struct net *net,
2500 const struct nlattr *attr,
2501 const struct sw_flow_key *key,
2502 struct sw_flow_actions **sfa,
2503 __be16 eth_type, __be16 vlan_tci,
2504 u32 mpls_label_count, bool log)
2505{
2506 int start, err;
2507 u32 nested = true;
2508
2509 if (!nla_len(attr))
2510 return ovs_nla_add_action(sfa, OVS_ACTION_ATTR_DEC_TTL,
2511 NULL, 0, log);
2512
2513 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_DEC_TTL, log);
2514 if (start < 0)
2515 return start;
2516
2517 err = ovs_nla_add_action(sfa, OVS_DEC_TTL_ATTR_ACTION, &nested,
2518 sizeof(nested), log);
2519
2520 if (err)
2521 return err;
2522
2523 err = __ovs_nla_copy_actions(net, attr, key, sfa, eth_type,
2524 vlan_tci, mpls_label_count, log);
2525 if (err)
2526 return err;
2527
2528 add_nested_action_end(*sfa, start);
2529 return 0;
2530}
2531
b2335040
YS		 2532static int validate_and_copy_clone(struct net *net,
2533 const struct nlattr *attr,
2534 const struct sw_flow_key *key,
2535 struct sw_flow_actions **sfa,
2536 __be16 eth_type, __be16 vlan_tci,
fbdcdd78 2537 u32 mpls_label_count, bool log, bool last)
b2335040
YS		 2538{
2539 int start, err;
2540 u32 exec;
2541
2542 if (nla_len(attr) && nla_len(attr) < NLA_HDRLEN)
2543 return -EINVAL;
2544
2545 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_CLONE, log);
2546 if (start < 0)
2547 return start;
2548
2549 exec = last || !actions_may_change_flow(attr);
2550
2551 err = ovs_nla_add_action(sfa, OVS_CLONE_ATTR_EXEC, &exec,
2552 sizeof(exec), log);
2553 if (err)
2554 return err;
2555
2556 err = __ovs_nla_copy_actions(net, attr, key, sfa,
fbdcdd78 2557 eth_type, vlan_tci, mpls_label_count, log);
b2335040
YS		 2558 if (err)
2559 return err;
2560
2561 add_nested_action_end(*sfa, start);
2562
2563 return 0;
2564}
2565
e6445719
PS		 2566void ovs_match_init(struct sw_flow_match *match,
2567 struct sw_flow_key *key,
2279994d 2568 bool reset_key,
e6445719
PS		 2569 struct sw_flow_mask *mask)
2570{
2571 memset(match, 0, sizeof(*match));
2572 match->key = key;
2573 match->mask = mask;
2574
2279994d 2575 if (reset_key)
2576 memset(key, 0, sizeof(*key));
e6445719
PS		 2577
2578 if (mask) {
2579 memset(&mask->key, 0, sizeof(mask->key));
2580 mask->range.start = mask->range.end = 0;
2581 }
2582}
2583
d91641d9
TG		 2584static int validate_geneve_opts(struct sw_flow_key *key)
2585{
2586 struct geneve_opt *option;
2587 int opts_len = key->tun_opts_len;
2588 bool crit_opt = false;
2589
2590 option = (struct geneve_opt *)TUN_METADATA_OPTS(key, key->tun_opts_len);
2591 while (opts_len > 0) {
2592 int len;
2593
2594 if (opts_len < sizeof(*option))
2595 return -EINVAL;
2596
2597 len = sizeof(*option) + option->length * 4;
2598 if (len > opts_len)
2599 return -EINVAL;
2600
2601 crit_opt |= !!(option->type & GENEVE_CRIT_OPT_TYPE);
2602
2603 option = (struct geneve_opt *)((u8 *)option + len);
2604 opts_len -= len;
89290b83 2605 }
d91641d9
TG		 2606
2607 key->tun_key.tun_flags |= crit_opt ? TUNNEL_CRIT_OPT : 0;
2608
2609 return 0;
2610}
2611
e6445719 2612static int validate_and_copy_set_tun(const struct nlattr *attr,
05da5898 2613 struct sw_flow_actions **sfa, bool log)
e6445719
PS		 2614{
2615 struct sw_flow_match match;
2616 struct sw_flow_key key;
34ae932a 2617 struct metadata_dst *tun_dst;
1d8fff90 2618 struct ip_tunnel_info *tun_info;
34ae932a 2619 struct ovs_tunnel_info *ovs_tun;
f0b128c1 2620 struct nlattr *a;
13101602 2621 int err = 0, start, opts_type;
256c87c1 2622 __be16 dst_opt_type;
e6445719 2623
256c87c1 2624 dst_opt_type = 0;
2279994d 2625 ovs_match_init(&match, &key, true, NULL);
6b26ba3a 2626 opts_type = ip_tun_from_nlattr(nla_data(attr), &match, false, log);
1dd144cf
TG		 2627 if (opts_type < 0)
2628 return opts_type;
e6445719 2629
f5796684 2630 if (key.tun_opts_len) {
1dd144cf
TG		 2631 switch (opts_type) {
2632 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
2633 err = validate_geneve_opts(&key);
2634 if (err < 0)
2635 return err;
256c87c1 2636 dst_opt_type = TUNNEL_GENEVE_OPT;
1dd144cf
TG		 2637 break;
2638 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
256c87c1 2639 dst_opt_type = TUNNEL_VXLAN_OPT;
1dd144cf 2640 break;
fc1372f8 2641 case OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS:
256c87c1 2642 dst_opt_type = TUNNEL_ERSPAN_OPT;
fc1372f8 2643 break;
1dd144cf 2644 }
89290b83 2645 }
f5796684 2646
05da5898 2647 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET, log);
e6445719
PS		 2648 if (start < 0)
2649 return start;
2650
3fcece12
JK		 2651 tun_dst = metadata_dst_alloc(key.tun_opts_len, METADATA_IP_TUNNEL,
2652 GFP_KERNEL);
2653
34ae932a
TG		 2654 if (!tun_dst)
2655 return -ENOMEM;
2656
d71785ff
PA		 2657 err = dst_cache_init(&tun_dst->u.tun_info.dst_cache, GFP_KERNEL);
2658 if (err) {
2659 dst_release((struct dst_entry *)tun_dst);
2660 return err;
2661 }
2662
f0b128c1 2663 a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL,
34ae932a
TG		 2664 sizeof(*ovs_tun), log);
2665 if (IS_ERR(a)) {
2666 dst_release((struct dst_entry *)tun_dst);
f0b128c1 2667 return PTR_ERR(a);
34ae932a
TG		 2668 }
2669
2670 ovs_tun = nla_data(a);
2671 ovs_tun->tun_dst = tun_dst;
f0b128c1 2672
34ae932a
TG		 2673 tun_info = &tun_dst->u.tun_info;
2674 tun_info->mode = IP_TUNNEL_INFO_TX;
00a93bab
JB		 2675 if (key.tun_proto == AF_INET6)
2676 tun_info->mode |= IP_TUNNEL_INFO_IPV6;
18b6f717 2677 else if (key.tun_proto == AF_INET && key.tun_key.u.ipv4.dst == 0)
2678 tun_info->mode |= IP_TUNNEL_INFO_BRIDGE;
1d8fff90 2679 tun_info->key = key.tun_key;
f0b128c1 2680
4c222798
PS		 2681 /* We need to store the options in the action itself since
2682 * everything else will go away after flow setup. We can append
2683 * it to tun_info and then point there.
2684 */
2685 ip_tunnel_info_opts_set(tun_info,
2686 TUN_METADATA_OPTS(&key, key.tun_opts_len),
256c87c1 2687 key.tun_opts_len, dst_opt_type);
e6445719
PS		 2688 add_nested_action_end(*sfa, start);
2689
2690 return err;
2691}
2692
b2d0f5d5
YY		 2693static bool validate_nsh(const struct nlattr *attr, bool is_mask,
2694 bool is_push_nsh, bool log)
2695{
2696 struct sw_flow_match match;
2697 struct sw_flow_key key;
2698 int ret = 0;
2699
2700 ovs_match_init(&match, &key, true, NULL);
2701 ret = nsh_key_put_from_nlattr(attr, &match, is_mask,
2702 is_push_nsh, log);
2703 return !ret;
2704}
2705
83d2b9ba
JR		 2706/* Return false if there are any non-masked bits set.
2707 * Mask follows data immediately, before any netlink padding.
2708 */
2709static bool validate_masked(u8 *data, int len)
2710{
2711 u8 *mask = data + len;
2712
2713 while (len--)
2714 if (*data++ & ~*mask++)
2715 return false;
2716
2717 return true;
2718}
2719
e6445719
PS		 2720static int validate_set(const struct nlattr *a,
2721 const struct sw_flow_key *flow_key,
0a6410fb
JB		 2722 struct sw_flow_actions **sfa, bool *skip_copy,
2723 u8 mac_proto, __be16 eth_type, bool masked, bool log)
e6445719
PS		 2724{
2725 const struct nlattr *ovs_key = nla_data(a);
2726 int key_type = nla_type(ovs_key);
83d2b9ba 2727 size_t key_len;
e6445719
PS		 2728
2729 /* There can be only one key in a action */
2730 if (nla_total_size(nla_len(ovs_key)) != nla_len(a))
2731 return -EINVAL;
2732
83d2b9ba
JR		 2733 key_len = nla_len(ovs_key);
2734 if (masked)
2735 key_len /= 2;
2736
e6445719 2737 if (key_type > OVS_KEY_ATTR_MAX ||
982b5270 2738 !check_attr_len(key_len, ovs_key_lens[key_type].len))
e6445719
PS		 2739 return -EINVAL;
2740
83d2b9ba
JR		 2741 if (masked && !validate_masked(nla_data(ovs_key), key_len))
2742 return -EINVAL;
2743
e6445719 2744 switch (key_type) {
e6445719
PS		 2745 case OVS_KEY_ATTR_PRIORITY:
2746 case OVS_KEY_ATTR_SKB_MARK:
182e3042 2747 case OVS_KEY_ATTR_CT_MARK:
33db4125 2748 case OVS_KEY_ATTR_CT_LABELS:
e6445719
PS		 2749 break;
2750
0a6410fb
JB		 2751 case OVS_KEY_ATTR_ETHERNET:
2752 if (mac_proto != MAC_PROTO_ETHERNET)
2753 return -EINVAL;
87e159c5 2754 break;
0a6410fb 2755
16a556ee
KC		 2756 case OVS_KEY_ATTR_TUNNEL: {
2757 int err;
2758
83d2b9ba
JR		 2759 if (masked)
2760 return -EINVAL; /* Masked tunnel set not supported. */
2761
2762 *skip_copy = true;
05da5898 2763 err = validate_and_copy_set_tun(a, sfa, log);
e6445719
PS		 2764 if (err)
2765 return err;
2766 break;
16a556ee
KC		 2767 }
2768 case OVS_KEY_ATTR_IPV4: {
2769 const struct ovs_key_ipv4 *ipv4_key;
e6445719 2770
25cd9ba0 2771 if (eth_type != htons(ETH_P_IP))
e6445719
PS		 2772 return -EINVAL;
2773
e6445719 2774 ipv4_key = nla_data(ovs_key);
e6445719 2775
83d2b9ba
JR		 2776 if (masked) {
2777 const struct ovs_key_ipv4 *mask = ipv4_key + 1;
e6445719 2778
83d2b9ba
JR		 2779 /* Non-writeable fields. */
2780 if (mask->ipv4_proto || mask->ipv4_frag)
2781 return -EINVAL;
2782 } else {
2783 if (ipv4_key->ipv4_proto != flow_key->ip.proto)
2784 return -EINVAL;
2785
2786 if (ipv4_key->ipv4_frag != flow_key->ip.frag)
2787 return -EINVAL;
2788 }
e6445719 2789 break;
16a556ee
KC		 2790 }
2791 case OVS_KEY_ATTR_IPV6: {
2792 const struct ovs_key_ipv6 *ipv6_key;
e6445719 2793
25cd9ba0 2794 if (eth_type != htons(ETH_P_IPV6))
e6445719
PS		 2795 return -EINVAL;
2796
e6445719 2797 ipv6_key = nla_data(ovs_key);
e6445719 2798
83d2b9ba
JR		 2799 if (masked) {
2800 const struct ovs_key_ipv6 *mask = ipv6_key + 1;
2801
2802 /* Non-writeable fields. */
2803 if (mask->ipv6_proto || mask->ipv6_frag)
2804 return -EINVAL;
2805
2806 /* Invalid bits in the flow label mask? */
2807 if (ntohl(mask->ipv6_label) & 0xFFF00000)
2808 return -EINVAL;
2809 } else {
2810 if (ipv6_key->ipv6_proto != flow_key->ip.proto)
2811 return -EINVAL;
e6445719 2812
83d2b9ba
JR		 2813 if (ipv6_key->ipv6_frag != flow_key->ip.frag)
2814 return -EINVAL;
2815 }
e6445719
PS		 2816 if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000)
2817 return -EINVAL;
2818
2819 break;
16a556ee 2820 }
e6445719 2821 case OVS_KEY_ATTR_TCP:
83d2b9ba
JR		 2822 if ((eth_type != htons(ETH_P_IP) &&
2823 eth_type != htons(ETH_P_IPV6)) ||
2824 flow_key->ip.proto != IPPROTO_TCP)
e6445719
PS		 2825 return -EINVAL;
2826
83d2b9ba 2827 break;
e6445719
PS		 2828
2829 case OVS_KEY_ATTR_UDP:
83d2b9ba
JR		 2830 if ((eth_type != htons(ETH_P_IP) &&
2831 eth_type != htons(ETH_P_IPV6)) ||
2832 flow_key->ip.proto != IPPROTO_UDP)
e6445719
PS		 2833 return -EINVAL;
2834
83d2b9ba 2835 break;
25cd9ba0
SH		 2836
2837 case OVS_KEY_ATTR_MPLS:
2838 if (!eth_p_mpls(eth_type))
2839 return -EINVAL;
2840 break;
e6445719
PS		 2841
2842 case OVS_KEY_ATTR_SCTP:
83d2b9ba
JR		 2843 if ((eth_type != htons(ETH_P_IP) &&
2844 eth_type != htons(ETH_P_IPV6)) ||
2845 flow_key->ip.proto != IPPROTO_SCTP)
e6445719
PS		 2846 return -EINVAL;
2847
83d2b9ba 2848 break;
e6445719 2849
b2d0f5d5
YY		 2850 case OVS_KEY_ATTR_NSH:
2851 if (eth_type != htons(ETH_P_NSH))
2852 return -EINVAL;
2853 if (!validate_nsh(nla_data(a), masked, false, log))
2854 return -EINVAL;
2855 break;
2856
e6445719
PS		 2857 default:
2858 return -EINVAL;
2859 }
2860
83d2b9ba
JR		 2861 /* Convert non-masked non-tunnel set actions to masked set actions. */
2862 if (!masked && key_type != OVS_KEY_ATTR_TUNNEL) {
2863 int start, len = key_len * 2;
2864 struct nlattr *at;
2865
2866 *skip_copy = true;
2867
2868 start = add_nested_action_start(sfa,
2869 OVS_ACTION_ATTR_SET_TO_MASKED,
2870 log);
2871 if (start < 0)
2872 return start;
2873
2874 at = __add_action(sfa, key_type, NULL, len, log);
2875 if (IS_ERR(at))
2876 return PTR_ERR(at);
2877
2878 memcpy(nla_data(at), nla_data(ovs_key), key_len); /* Key. */
2879 memset(nla_data(at) + key_len, 0xff, key_len); /* Mask. */
2880 /* Clear non-writeable bits from otherwise writeable fields. */
2881 if (key_type == OVS_KEY_ATTR_IPV6) {
2882 struct ovs_key_ipv6 *mask = nla_data(at) + key_len;
2883
2884 mask->ipv6_label &= htonl(0x000FFFFF);
2885 }
2886 add_nested_action_end(*sfa, start);
2887 }
2888
e6445719
PS		 2889 return 0;
2890}
2891
2892static int validate_userspace(const struct nlattr *attr)
2893{
2894 static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = {
2895 [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 },
2896 [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC },
8f0aad6f 2897 [OVS_USERSPACE_ATTR_EGRESS_TUN_PORT] = {.type = NLA_U32 },
e6445719
PS		 2898 };
2899 struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];
2900 int error;
2901
8cb08174
JB		 2902 error = nla_parse_nested_deprecated(a, OVS_USERSPACE_ATTR_MAX, attr,
2903 userspace_policy, NULL);
e6445719
PS		 2904 if (error)
2905 return error;
2906
2907 if (!a[OVS_USERSPACE_ATTR_PID] ||
2908 !nla_get_u32(a[OVS_USERSPACE_ATTR_PID]))
2909 return -EINVAL;
2910
2911 return 0;
2912}
2913
4d5ec89f
NS		 2914static const struct nla_policy cpl_policy[OVS_CHECK_PKT_LEN_ATTR_MAX + 1] = {
2915 [OVS_CHECK_PKT_LEN_ATTR_PKT_LEN] = {.type = NLA_U16 },
2916 [OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER] = {.type = NLA_NESTED },
2917 [OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL] = {.type = NLA_NESTED },
2918};
2919
2920static int validate_and_copy_check_pkt_len(struct net *net,
2921 const struct nlattr *attr,
2922 const struct sw_flow_key *key,
2923 struct sw_flow_actions **sfa,
2924 __be16 eth_type, __be16 vlan_tci,
fbdcdd78 2925 u32 mpls_label_count,
4d5ec89f
NS		 2926 bool log, bool last)
2927{
2928 const struct nlattr *acts_if_greater, *acts_if_lesser_eq;
2929 struct nlattr *a[OVS_CHECK_PKT_LEN_ATTR_MAX + 1];
2930 struct check_pkt_len_arg arg;
2931 int nested_acts_start;
2932 int start, err;
2933
8cb08174
JB		 2934 err = nla_parse_deprecated_strict(a, OVS_CHECK_PKT_LEN_ATTR_MAX,
2935 nla_data(attr), nla_len(attr),
2936 cpl_policy, NULL);
4d5ec89f
NS		 2937 if (err)
2938 return err;
2939
2940 if (!a[OVS_CHECK_PKT_LEN_ATTR_PKT_LEN] ||
2941 !nla_get_u16(a[OVS_CHECK_PKT_LEN_ATTR_PKT_LEN]))
2942 return -EINVAL;
2943
2944 acts_if_lesser_eq = a[OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL];
2945 acts_if_greater = a[OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER];
2946
2947 /* Both the nested action should be present. */
2948 if (!acts_if_greater || !acts_if_lesser_eq)
2949 return -EINVAL;
2950
2951 /* validation done, copy the nested actions. */
2952 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_CHECK_PKT_LEN,
2953 log);
2954 if (start < 0)
2955 return start;
2956
2957 arg.pkt_len = nla_get_u16(a[OVS_CHECK_PKT_LEN_ATTR_PKT_LEN]);
2958 arg.exec_for_lesser_equal =
2959 last || !actions_may_change_flow(acts_if_lesser_eq);
2960 arg.exec_for_greater =
2961 last || !actions_may_change_flow(acts_if_greater);
2962
2963 err = ovs_nla_add_action(sfa, OVS_CHECK_PKT_LEN_ATTR_ARG, &arg,
2964 sizeof(arg), log);
2965 if (err)
2966 return err;
2967
2968 nested_acts_start = add_nested_action_start(sfa,
2969 OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL, log);
2970 if (nested_acts_start < 0)
2971 return nested_acts_start;
2972
2973 err = __ovs_nla_copy_actions(net, acts_if_lesser_eq, key, sfa,
fbdcdd78 2974 eth_type, vlan_tci, mpls_label_count, log);
4d5ec89f
NS		 2975
2976 if (err)
2977 return err;
2978
2979 add_nested_action_end(*sfa, nested_acts_start);
2980
2981 nested_acts_start = add_nested_action_start(sfa,
2982 OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER, log);
2983 if (nested_acts_start < 0)
2984 return nested_acts_start;
2985
2986 err = __ovs_nla_copy_actions(net, acts_if_greater, key, sfa,
fbdcdd78 2987 eth_type, vlan_tci, mpls_label_count, log);
4d5ec89f
NS		 2988
2989 if (err)
2990 return err;
2991
2992 add_nested_action_end(*sfa, nested_acts_start);
2993 add_nested_action_end(*sfa, start);
2994 return 0;
2995}
2996
e6445719 2997static int copy_action(const struct nlattr *from,
05da5898 2998 struct sw_flow_actions **sfa, bool log)
e6445719
PS		 2999{
3000 int totlen = NLA_ALIGN(from->nla_len);
3001 struct nlattr *to;
3002
05da5898 3003 to = reserve_sfa_size(sfa, from->nla_len, log);
e6445719
PS		 3004 if (IS_ERR(to))
3005 return PTR_ERR(to);
3006
3007 memcpy(to, from, totlen);
3008 return 0;
3009}
3010
7f8a436e 3011static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
25cd9ba0 3012 const struct sw_flow_key *key,
798c1661 3013 struct sw_flow_actions **sfa,
fbdcdd78
MV		 3014 __be16 eth_type, __be16 vlan_tci,
3015 u32 mpls_label_count, bool log)
e6445719 3016{
0a6410fb 3017 u8 mac_proto = ovs_key_mac_proto(key);
e6445719
PS		 3018 const struct nlattr *a;
3019 int rem, err;
3020
e6445719
PS		 3021 nla_for_each_nested(a, attr, rem) {
3022 /* Expected argument lengths, (u32)-1 for variable length. */
3023 static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {
3024 [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32),
971427f3 3025 [OVS_ACTION_ATTR_RECIRC] = sizeof(u32),
e6445719 3026 [OVS_ACTION_ATTR_USERSPACE] = (u32)-1,
25cd9ba0
SH		 3027 [OVS_ACTION_ATTR_PUSH_MPLS] = sizeof(struct ovs_action_push_mpls),
3028 [OVS_ACTION_ATTR_POP_MPLS] = sizeof(__be16),
e6445719
PS		 3029 [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan),
3030 [OVS_ACTION_ATTR_POP_VLAN] = 0,
3031 [OVS_ACTION_ATTR_SET] = (u32)-1,
83d2b9ba 3032 [OVS_ACTION_ATTR_SET_MASKED] = (u32)-1,
971427f3 3033 [OVS_ACTION_ATTR_SAMPLE] = (u32)-1,
7f8a436e
JS		 3034 [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash),
3035 [OVS_ACTION_ATTR_CT] = (u32)-1,
b8226962 3036 [OVS_ACTION_ATTR_CT_CLEAR] = 0,
f2a4d086 3037 [OVS_ACTION_ATTR_TRUNC] = sizeof(struct ovs_action_trunc),
91820da6
JB		 3038 [OVS_ACTION_ATTR_PUSH_ETH] = sizeof(struct ovs_action_push_eth),
3039 [OVS_ACTION_ATTR_POP_ETH] = 0,
b2d0f5d5
YY		 3040 [OVS_ACTION_ATTR_PUSH_NSH] = (u32)-1,
3041 [OVS_ACTION_ATTR_POP_NSH] = 0,
cd8a6c33 3042 [OVS_ACTION_ATTR_METER] = sizeof(u32),
b2335040 3043 [OVS_ACTION_ATTR_CLONE] = (u32)-1,
4d5ec89f 3044 [OVS_ACTION_ATTR_CHECK_PKT_LEN] = (u32)-1,
f66b53fd 3045 [OVS_ACTION_ATTR_ADD_MPLS] = sizeof(struct ovs_action_add_mpls),
744676e7 3046 [OVS_ACTION_ATTR_DEC_TTL] = (u32)-1,
e6445719
PS		 3047 };
3048 const struct ovs_action_push_vlan *vlan;
3049 int type = nla_type(a);
3050 bool skip_copy;
3051
3052 if (type > OVS_ACTION_ATTR_MAX ||
3053 (action_lens[type] != nla_len(a) &&
3054 action_lens[type] != (u32)-1))
3055 return -EINVAL;
3056
3057 skip_copy = false;
3058 switch (type) {
3059 case OVS_ACTION_ATTR_UNSPEC:
3060 return -EINVAL;
3061
3062 case OVS_ACTION_ATTR_USERSPACE:
3063 err = validate_userspace(a);
3064 if (err)
3065 return err;
3066 break;
3067
3068 case OVS_ACTION_ATTR_OUTPUT:
3069 if (nla_get_u32(a) >= DP_MAX_PORTS)
3070 return -EINVAL;
3071 break;
3072
f2a4d086
WT		 3073 case OVS_ACTION_ATTR_TRUNC: {
3074 const struct ovs_action_trunc *trunc = nla_data(a);
3075
3076 if (trunc->max_len < ETH_HLEN)
3077 return -EINVAL;
3078 break;
3079 }
3080
971427f3
AZ		 3081 case OVS_ACTION_ATTR_HASH: {
3082 const struct ovs_action_hash *act_hash = nla_data(a);
3083
3084 switch (act_hash->hash_alg) {
3085 case OVS_HASH_ALG_L4:
3086 break;
3087 default:
3088 return -EINVAL;
3089 }
3090
3091 break;
3092 }
e6445719
PS		 3093
3094 case OVS_ACTION_ATTR_POP_VLAN:
0a6410fb
JB		 3095 if (mac_proto != MAC_PROTO_ETHERNET)
3096 return -EINVAL;
25cd9ba0 3097 vlan_tci = htons(0);
e6445719
PS		 3098 break;
3099
3100 case OVS_ACTION_ATTR_PUSH_VLAN:
0a6410fb
JB		 3101 if (mac_proto != MAC_PROTO_ETHERNET)
3102 return -EINVAL;
e6445719 3103 vlan = nla_data(a);
018c1dda 3104 if (!eth_type_vlan(vlan->vlan_tpid))
e6445719 3105 return -EINVAL;
9df46aef 3106 if (!(vlan->vlan_tci & htons(VLAN_CFI_MASK)))
e6445719 3107 return -EINVAL;
25cd9ba0 3108 vlan_tci = vlan->vlan_tci;
e6445719
PS		 3109 break;
3110
971427f3
AZ		 3111 case OVS_ACTION_ATTR_RECIRC:
3112 break;
3113
f66b53fd
MV		 3114 case OVS_ACTION_ATTR_ADD_MPLS: {
3115 const struct ovs_action_add_mpls *mpls = nla_data(a);
3116
3117 if (!eth_p_mpls(mpls->mpls_ethertype))
3118 return -EINVAL;
3119
3120 if (mpls->tun_flags & OVS_MPLS_L3_TUNNEL_FLAG_MASK) {
3121 if (vlan_tci & htons(VLAN_CFI_MASK) ||
3122 (eth_type != htons(ETH_P_IP) &&
3123 eth_type != htons(ETH_P_IPV6) &&
3124 eth_type != htons(ETH_P_ARP) &&
3125 eth_type != htons(ETH_P_RARP) &&
3126 !eth_p_mpls(eth_type)))
3127 return -EINVAL;
3128 mpls_label_count++;
3129 } else {
3130 if (mac_proto == MAC_PROTO_ETHERNET) {
3131 mpls_label_count = 1;
3132 mac_proto = MAC_PROTO_NONE;
3133 } else {
3134 mpls_label_count++;
3135 }
3136 }
3137 eth_type = mpls->mpls_ethertype;
3138 break;
3139 }
3140
25cd9ba0
SH		 3141 case OVS_ACTION_ATTR_PUSH_MPLS: {
3142 const struct ovs_action_push_mpls *mpls = nla_data(a);
3143
25cd9ba0
SH		 3144 if (!eth_p_mpls(mpls->mpls_ethertype))
3145 return -EINVAL;
3146 /* Prohibit push MPLS other than to a white list
3147 * for packets that have a known tag order.
3148 */
9df46aef 3149 if (vlan_tci & htons(VLAN_CFI_MASK) ||
25cd9ba0
SH		 3150 (eth_type != htons(ETH_P_IP) &&
3151 eth_type != htons(ETH_P_IPV6) &&
3152 eth_type != htons(ETH_P_ARP) &&
3153 eth_type != htons(ETH_P_RARP) &&
3154 !eth_p_mpls(eth_type)))
3155 return -EINVAL;
3156 eth_type = mpls->mpls_ethertype;
fbdcdd78 3157 mpls_label_count++;
25cd9ba0
SH		 3158 break;
3159 }
3160
fbdcdd78
MV		 3161 case OVS_ACTION_ATTR_POP_MPLS: {
3162 __be16 proto;
9df46aef 3163 if (vlan_tci & htons(VLAN_CFI_MASK) ||
25cd9ba0
SH		 3164 !eth_p_mpls(eth_type))
3165 return -EINVAL;
3166
fbdcdd78
MV		 3167 /* Disallow subsequent L2.5+ set actions and mpls_pop
3168 * actions once the last MPLS label in the packet is
3169 * is popped as there is no check here to ensure that
3170 * the new eth type is valid and thus set actions could
3171 * write off the end of the packet or otherwise corrupt
3172 * it.
25cd9ba0
SH		 3173 *
3174 * Support for these actions is planned using packet
3175 * recirculation.
3176 */
fbdcdd78 3177 proto = nla_get_be16(a);
f66b53fd
MV		 3178
3179 if (proto == htons(ETH_P_TEB) &&
3180 mac_proto != MAC_PROTO_NONE)
3181 return -EINVAL;
3182
fbdcdd78
MV		 3183 mpls_label_count--;
3184
3185 if (!eth_p_mpls(proto) || !mpls_label_count)
3186 eth_type = htons(0);
3187 else
3188 eth_type = proto;
3189
25cd9ba0 3190 break;
fbdcdd78 3191 }
25cd9ba0 3192
e6445719 3193 case OVS_ACTION_ATTR_SET:
25cd9ba0 3194 err = validate_set(a, key, sfa,
0a6410fb
JB		 3195 &skip_copy, mac_proto, eth_type,
3196 false, log);
83d2b9ba
JR		 3197 if (err)
3198 return err;
3199 break;
3200
3201 case OVS_ACTION_ATTR_SET_MASKED:
3202 err = validate_set(a, key, sfa,
0a6410fb
JB		 3203 &skip_copy, mac_proto, eth_type,
3204 true, log);
e6445719
PS		 3205 if (err)
3206 return err;
3207 break;
3208
798c1661 3209 case OVS_ACTION_ATTR_SAMPLE: {
3210 bool last = nla_is_last(a, rem);
3211
3212 err = validate_and_copy_sample(net, a, key, sfa,
3213 eth_type, vlan_tci,
fbdcdd78 3214 mpls_label_count,
798c1661 3215 log, last);
e6445719
PS		 3216 if (err)
3217 return err;
3218 skip_copy = true;
3219 break;
798c1661 3220 }
e6445719 3221
7f8a436e
JS		 3222 case OVS_ACTION_ATTR_CT:
3223 err = ovs_ct_copy_action(net, a, key, sfa, log);
3224 if (err)
3225 return err;
3226 skip_copy = true;
3227 break;
3228
b8226962
EG		 3229 case OVS_ACTION_ATTR_CT_CLEAR:
3230 break;
3231
91820da6
JB		 3232 case OVS_ACTION_ATTR_PUSH_ETH:
3233 /* Disallow pushing an Ethernet header if one
3234 * is already present */
3235 if (mac_proto != MAC_PROTO_NONE)
3236 return -EINVAL;
46ebe283 3237 mac_proto = MAC_PROTO_ETHERNET;
91820da6
JB		 3238 break;
3239
3240 case OVS_ACTION_ATTR_POP_ETH:
3241 if (mac_proto != MAC_PROTO_ETHERNET)
3242 return -EINVAL;
9df46aef 3243 if (vlan_tci & htons(VLAN_CFI_MASK))
91820da6 3244 return -EINVAL;
46ebe283 3245 mac_proto = MAC_PROTO_NONE;
91820da6
JB		 3246 break;
3247
b2d0f5d5
YY		 3248 case OVS_ACTION_ATTR_PUSH_NSH:
3249 if (mac_proto != MAC_PROTO_ETHERNET) {
3250 u8 next_proto;
3251
3252 next_proto = tun_p_from_eth_p(eth_type);
3253 if (!next_proto)
3254 return -EINVAL;
3255 }
3256 mac_proto = MAC_PROTO_NONE;
3257 if (!validate_nsh(nla_data(a), false, true, true))
3258 return -EINVAL;
3259 break;
3260
3261 case OVS_ACTION_ATTR_POP_NSH: {
3262 __be16 inner_proto;
3263
3264 if (eth_type != htons(ETH_P_NSH))
3265 return -EINVAL;
3266 inner_proto = tun_p_to_eth_p(key->nsh.base.np);
3267 if (!inner_proto)
3268 return -EINVAL;
3269 if (key->nsh.base.np == TUN_P_ETHERNET)
3270 mac_proto = MAC_PROTO_ETHERNET;
3271 else
3272 mac_proto = MAC_PROTO_NONE;
3273 break;
3274 }
3275
cd8a6c33
AZ		 3276 case OVS_ACTION_ATTR_METER:
3277 /* Non-existent meters are simply ignored. */
3278 break;
3279
b2335040
YS		 3280 case OVS_ACTION_ATTR_CLONE: {
3281 bool last = nla_is_last(a, rem);
3282
3283 err = validate_and_copy_clone(net, a, key, sfa,
3284 eth_type, vlan_tci,
fbdcdd78 3285 mpls_label_count,
b2335040
YS		 3286 log, last);
3287 if (err)
3288 return err;
3289 skip_copy = true;
3290 break;
3291 }
3292
4d5ec89f
NS		 3293 case OVS_ACTION_ATTR_CHECK_PKT_LEN: {
3294 bool last = nla_is_last(a, rem);
3295
3296 err = validate_and_copy_check_pkt_len(net, a, key, sfa,
3297 eth_type,
fbdcdd78
MV		 3298 vlan_tci,
3299 mpls_label_count,
3300 log, last);
4d5ec89f
NS		 3301 if (err)
3302 return err;
3303 skip_copy = true;
3304 break;
3305 }
3306
744676e7
MC		 3307 case OVS_ACTION_ATTR_DEC_TTL:
3308 err = validate_and_copy_dec_ttl(net, a, key, sfa,
3309 eth_type, vlan_tci,
3310 mpls_label_count, log);
3311 if (err)
3312 return err;
3313 skip_copy = true;
3314 break;
3315
e6445719 3316 default:
05da5898 3317 OVS_NLERR(log, "Unknown Action type %d", type);
e6445719
PS		 3318 return -EINVAL;
3319 }
3320 if (!skip_copy) {
05da5898 3321 err = copy_action(a, sfa, log);
e6445719
PS		 3322 if (err)
3323 return err;
3324 }
3325 }
3326
3327 if (rem > 0)
3328 return -EINVAL;
3329
3330 return 0;
3331}
3332
83d2b9ba 3333/* 'key' must be the masked key. */
7f8a436e 3334int ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
25cd9ba0 3335 const struct sw_flow_key *key,
05da5898 3336 struct sw_flow_actions **sfa, bool log)
25cd9ba0 3337{
2fdb957d 3338 int err;
fbdcdd78 3339 u32 mpls_label_count = 0;
2fdb957d 3340
67c8d22a 3341 *sfa = nla_alloc_flow_actions(min(nla_len(attr), MAX_ACTIONS_BUFSIZE));
2fdb957d
PS		 3342 if (IS_ERR(*sfa))
3343 return PTR_ERR(*sfa);
3344
fbdcdd78
MV		 3345 if (eth_p_mpls(key->eth.type))
3346 mpls_label_count = hweight_long(key->mpls.num_labels_mask);
3347
8e2fed1c 3348 (*sfa)->orig_len = nla_len(attr);
798c1661 3349 err = __ovs_nla_copy_actions(net, attr, key, sfa, key->eth.type,
fbdcdd78 3350 key->eth.vlan.tci, mpls_label_count, log);
2fdb957d 3351 if (err)
34ae932a 3352 ovs_nla_free_flow_actions(*sfa);
2fdb957d
PS		 3353
3354 return err;
25cd9ba0
SH		 3355}
3356
798c1661 3357static int sample_action_to_attr(const struct nlattr *attr,
3358 struct sk_buff *skb)
e6445719 3359{
798c1661 3360 struct nlattr *start, *ac_start = NULL, *sample_arg;
3361 int err = 0, rem = nla_len(attr);
3362 const struct sample_arg *arg;
3363 struct nlattr *actions;
e6445719 3364
ae0be8de 3365 start = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_SAMPLE);
e6445719
PS		 3366 if (!start)
3367 return -EMSGSIZE;
3368
798c1661 3369 sample_arg = nla_data(attr);
3370 arg = nla_data(sample_arg);
3371 actions = nla_next(sample_arg, &rem);
e6445719 3372
798c1661 3373 if (nla_put_u32(skb, OVS_SAMPLE_ATTR_PROBABILITY, arg->probability)) {
3374 err = -EMSGSIZE;
3375 goto out;
3376 }
3377
ae0be8de 3378 ac_start = nla_nest_start_noflag(skb, OVS_SAMPLE_ATTR_ACTIONS);
798c1661 3379 if (!ac_start) {
3380 err = -EMSGSIZE;
3381 goto out;
3382 }
3383
3384 err = ovs_nla_put_actions(actions, rem, skb);
3385
3386out:
3387 if (err) {
3388 nla_nest_cancel(skb, ac_start);
3389 nla_nest_cancel(skb, start);
3390 } else {
3391 nla_nest_end(skb, ac_start);
3392 nla_nest_end(skb, start);
e6445719
PS		 3393 }
3394
e6445719
PS		 3395 return err;
3396}
3397
b2335040
YS		 3398static int clone_action_to_attr(const struct nlattr *attr,
3399 struct sk_buff *skb)
3400{
3401 struct nlattr *start;
3402 int err = 0, rem = nla_len(attr);
3403
ae0be8de 3404 start = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_CLONE);
b2335040
YS		 3405 if (!start)
3406 return -EMSGSIZE;
3407
3408 err = ovs_nla_put_actions(nla_data(attr), rem, skb);
3409
3410 if (err)
3411 nla_nest_cancel(skb, start);
3412 else
3413 nla_nest_end(skb, start);
3414
3415 return err;
3416}
3417
4d5ec89f
NS		 3418static int check_pkt_len_action_to_attr(const struct nlattr *attr,
3419 struct sk_buff *skb)
3420{
3421 struct nlattr *start, *ac_start = NULL;
3422 const struct check_pkt_len_arg *arg;
3423 const struct nlattr *a, *cpl_arg;
3424 int err = 0, rem = nla_len(attr);
3425
ae0be8de 3426 start = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_CHECK_PKT_LEN);
4d5ec89f
NS		 3427 if (!start)
3428 return -EMSGSIZE;
3429
3430 /* The first nested attribute in 'attr' is always
3431 * 'OVS_CHECK_PKT_LEN_ATTR_ARG'.
3432 */
3433 cpl_arg = nla_data(attr);
3434 arg = nla_data(cpl_arg);
3435
3436 if (nla_put_u16(skb, OVS_CHECK_PKT_LEN_ATTR_PKT_LEN, arg->pkt_len)) {
3437 err = -EMSGSIZE;
3438 goto out;
3439 }
3440
3441 /* Second nested attribute in 'attr' is always
3442 * 'OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL'.
3443 */
3444 a = nla_next(cpl_arg, &rem);
ae0be8de
MK		 3445 ac_start = nla_nest_start_noflag(skb,
3446 OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL);
4d5ec89f
NS		 3447 if (!ac_start) {
3448 err = -EMSGSIZE;
3449 goto out;
3450 }
3451
3452 err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb);
3453 if (err) {
3454 nla_nest_cancel(skb, ac_start);
3455 goto out;
3456 } else {
3457 nla_nest_end(skb, ac_start);
3458 }
3459
3460 /* Third nested attribute in 'attr' is always
3461 * OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER.
3462 */
3463 a = nla_next(a, &rem);
ae0be8de
MK		 3464 ac_start = nla_nest_start_noflag(skb,
3465 OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER);
4d5ec89f
NS		 3466 if (!ac_start) {
3467 err = -EMSGSIZE;
3468 goto out;
3469 }
3470
3471 err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb);
3472 if (err) {
3473 nla_nest_cancel(skb, ac_start);
3474 goto out;
3475 } else {
3476 nla_nest_end(skb, ac_start);
3477 }
3478
3479 nla_nest_end(skb, start);
3480 return 0;
3481
3482out:
3483 nla_nest_cancel(skb, start);
3484 return err;
3485}
3486
744676e7
MC		 3487static int dec_ttl_action_to_attr(const struct nlattr *attr,
3488 struct sk_buff *skb)
3489{
3490 int err = 0, rem = nla_len(attr);
3491 struct nlattr *start;
3492
3493 start = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_DEC_TTL);
3494
3495 if (!start)
3496 return -EMSGSIZE;
3497
3498 err = ovs_nla_put_actions(nla_data(attr), rem, skb);
3499 if (err)
3500 nla_nest_cancel(skb, start);
3501 else
3502 nla_nest_end(skb, start);
3503
3504 return err;
3505}
3506
e6445719
PS		 3507static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb)
3508{
3509 const struct nlattr *ovs_key = nla_data(a);
3510 int key_type = nla_type(ovs_key);
3511 struct nlattr *start;
3512 int err;
3513
3514 switch (key_type) {
f0b128c1 3515 case OVS_KEY_ATTR_TUNNEL_INFO: {
34ae932a
TG		 3516 struct ovs_tunnel_info *ovs_tun = nla_data(ovs_key);
3517 struct ip_tunnel_info *tun_info = &ovs_tun->tun_dst->u.tun_info;
f0b128c1 3518
ae0be8de 3519 start = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_SET);
e6445719
PS		 3520 if (!start)
3521 return -EMSGSIZE;
3522
e905eabc
SH		 3523 err = ip_tun_to_nlattr(skb, &tun_info->key,
3524 ip_tunnel_info_opts(tun_info),
3525 tun_info->options_len,
18b6f717 3526 ip_tunnel_info_af(tun_info), tun_info->mode);
e6445719
PS		 3527 if (err)
3528 return err;
3529 nla_nest_end(skb, start);
3530 break;
f0b128c1 3531 }
e6445719
PS		 3532 default:
3533 if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key))
3534 return -EMSGSIZE;
3535 break;
3536 }
3537
3538 return 0;
3539}
3540
83d2b9ba
JR		 3541static int masked_set_action_to_set_action_attr(const struct nlattr *a,
3542 struct sk_buff *skb)
3543{
3544 const struct nlattr *ovs_key = nla_data(a);
f4f8e738 3545 struct nlattr *nla;
83d2b9ba
JR		 3546 size_t key_len = nla_len(ovs_key) / 2;
3547
3548 /* Revert the conversion we did from a non-masked set action to
3549 * masked set action.
3550 */
ae0be8de 3551 nla = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_SET);
f4f8e738 3552 if (!nla)
83d2b9ba
JR		 3553 return -EMSGSIZE;
3554
f4f8e738
JS		 3555 if (nla_put(skb, nla_type(ovs_key), key_len, nla_data(ovs_key)))
3556 return -EMSGSIZE;
3557
3558 nla_nest_end(skb, nla);
83d2b9ba
JR		 3559 return 0;
3560}
3561
e6445719
PS		 3562int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb)
3563{
3564 const struct nlattr *a;
3565 int rem, err;
3566
3567 nla_for_each_attr(a, attr, len, rem) {
3568 int type = nla_type(a);
3569
3570 switch (type) {
3571 case OVS_ACTION_ATTR_SET:
3572 err = set_action_to_attr(a, skb);
3573 if (err)
3574 return err;
3575 break;
3576
83d2b9ba
JR		 3577 case OVS_ACTION_ATTR_SET_TO_MASKED:
3578 err = masked_set_action_to_set_action_attr(a, skb);
3579 if (err)
3580 return err;
3581 break;
3582
e6445719
PS		 3583 case OVS_ACTION_ATTR_SAMPLE:
3584 err = sample_action_to_attr(a, skb);
3585 if (err)
3586 return err;
3587 break;
7f8a436e
JS		 3588
3589 case OVS_ACTION_ATTR_CT:
3590 err = ovs_ct_action_to_attr(nla_data(a), skb);
3591 if (err)
3592 return err;
3593 break;
3594
b2335040
YS		 3595 case OVS_ACTION_ATTR_CLONE:
3596 err = clone_action_to_attr(a, skb);
3597 if (err)
3598 return err;
3599 break;
3600
4d5ec89f
NS		 3601 case OVS_ACTION_ATTR_CHECK_PKT_LEN:
3602 err = check_pkt_len_action_to_attr(a, skb);
3603 if (err)
3604 return err;
3605 break;
3606
744676e7
MC		 3607 case OVS_ACTION_ATTR_DEC_TTL:
3608 err = dec_ttl_action_to_attr(a, skb);
3609 if (err)
3610 return err;
3611 break;
3612
e6445719
PS		 3613 default:
3614 if (nla_put(skb, type, nla_len(a), nla_data(a)))
3615 return -EMSGSIZE;
3616 break;
3617 }
3618 }
3619
3620 return 0;
3621}
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