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Merge remote-tracking branches 'asoc/topic/rockchip', 'asoc/topic/rt5514', 'asoc...
[mirror_ubuntu-bionic-kernel.git] / net / openvswitch / flow_netlink.c
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e6445719 1/*
971427f3 2 * Copyright (c) 2007-2014 Nicira, Inc.
e6445719
PS		 3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of version 2 of the GNU General Public
6 * License as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
16 * 02110-1301, USA
17 */
18
2235ad1c
JP		 19#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
20
e6445719
PS		 21#include "flow.h"
22#include "datapath.h"
23#include <linux/uaccess.h>
24#include <linux/netdevice.h>
25#include <linux/etherdevice.h>
26#include <linux/if_ether.h>
27#include <linux/if_vlan.h>
28#include <net/llc_pdu.h>
29#include <linux/kernel.h>
30#include <linux/jhash.h>
31#include <linux/jiffies.h>
32#include <linux/llc.h>
33#include <linux/module.h>
34#include <linux/in.h>
35#include <linux/rcupdate.h>
36#include <linux/if_arp.h>
37#include <linux/ip.h>
38#include <linux/ipv6.h>
39#include <linux/sctp.h>
40#include <linux/tcp.h>
41#include <linux/udp.h>
42#include <linux/icmp.h>
43#include <linux/icmpv6.h>
44#include <linux/rculist.h>
f5796684 45#include <net/geneve.h>
e6445719
PS		 46#include <net/ip.h>
47#include <net/ipv6.h>
48#include <net/ndisc.h>
25cd9ba0 49#include <net/mpls.h>
614732ea 50#include <net/vxlan.h>
e6445719
PS		 51
52#include "flow_netlink.h"
53
81bfe3c3
TG		 54struct ovs_len_tbl {
55 int len;
56 const struct ovs_len_tbl *next;
57};
58
59#define OVS_ATTR_NESTED -1
982b5270 60#define OVS_ATTR_VARIABLE -2
81bfe3c3 61
a85311bf
PS		 62static void update_range(struct sw_flow_match *match,
63 size_t offset, size_t size, bool is_mask)
e6445719 64{
a85311bf 65 struct sw_flow_key_range *range;
e6445719
PS		 66 size_t start = rounddown(offset, sizeof(long));
67 size_t end = roundup(offset + size, sizeof(long));
68
69 if (!is_mask)
70 range = &match->range;
a85311bf 71 else
e6445719
PS		 72 range = &match->mask->range;
73
e6445719
PS		 74 if (range->start == range->end) {
75 range->start = start;
76 range->end = end;
77 return;
78 }
79
80 if (range->start > start)
81 range->start = start;
82
83 if (range->end < end)
84 range->end = end;
85}
86
87#define SW_FLOW_KEY_PUT(match, field, value, is_mask) \
88 do { \
a85311bf
PS		 89 update_range(match, offsetof(struct sw_flow_key, field), \
90 sizeof((match)->key->field), is_mask); \
91 if (is_mask) \
92 (match)->mask->key.field = value; \
93 else \
e6445719 94 (match)->key->field = value; \
e6445719
PS		 95 } while (0)
96
f5796684
JG		 97#define SW_FLOW_KEY_MEMCPY_OFFSET(match, offset, value_p, len, is_mask) \
98 do { \
a85311bf 99 update_range(match, offset, len, is_mask); \
f5796684
JG		 100 if (is_mask) \
101 memcpy((u8 *)&(match)->mask->key + offset, value_p, \
a85311bf 102 len); \
f5796684
JG		 103 else \
104 memcpy((u8 *)(match)->key + offset, value_p, len); \
e6445719
PS		 105 } while (0)
106
f5796684
JG		 107#define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \
108 SW_FLOW_KEY_MEMCPY_OFFSET(match, offsetof(struct sw_flow_key, field), \
109 value_p, len, is_mask)
110
a85311bf
PS		 111#define SW_FLOW_KEY_MEMSET_FIELD(match, field, value, is_mask) \
112 do { \
113 update_range(match, offsetof(struct sw_flow_key, field), \
114 sizeof((match)->key->field), is_mask); \
115 if (is_mask) \
116 memset((u8 *)&(match)->mask->key.field, value, \
117 sizeof((match)->mask->key.field)); \
118 else \
f47de068
PS		 119 memset((u8 *)&(match)->key->field, value, \
120 sizeof((match)->key->field)); \
f47de068 121 } while (0)
e6445719
PS		 122
123static bool match_validate(const struct sw_flow_match *match,
05da5898 124 u64 key_attrs, u64 mask_attrs, bool log)
e6445719 125{
0a6410fb 126 u64 key_expected = 0;
e6445719
PS		 127 u64 mask_allowed = key_attrs; /* At most allow all key attributes */
128
129 /* The following mask attributes allowed only if they
130 * pass the validation tests. */
131 mask_allowed &= ~((1 << OVS_KEY_ATTR_IPV4)
9dd7f890 132 | (1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4)
e6445719 133 | (1 << OVS_KEY_ATTR_IPV6)
9dd7f890 134 | (1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6)
e6445719 135 | (1 << OVS_KEY_ATTR_TCP)
5eb26b15 136 | (1 << OVS_KEY_ATTR_TCP_FLAGS)
e6445719
PS		 137 | (1 << OVS_KEY_ATTR_UDP)
138 | (1 << OVS_KEY_ATTR_SCTP)
139 | (1 << OVS_KEY_ATTR_ICMP)
140 | (1 << OVS_KEY_ATTR_ICMPV6)
141 | (1 << OVS_KEY_ATTR_ARP)
25cd9ba0
SH		 142 | (1 << OVS_KEY_ATTR_ND)
143 | (1 << OVS_KEY_ATTR_MPLS));
e6445719
PS		 144
145 /* Always allowed mask fields. */
146 mask_allowed |= ((1 << OVS_KEY_ATTR_TUNNEL)
147 | (1 << OVS_KEY_ATTR_IN_PORT)
148 | (1 << OVS_KEY_ATTR_ETHERTYPE));
149
150 /* Check key attributes. */
151 if (match->key->eth.type == htons(ETH_P_ARP)
152 || match->key->eth.type == htons(ETH_P_RARP)) {
153 key_expected |= 1 << OVS_KEY_ATTR_ARP;
f2a01517 154 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
e6445719
PS		 155 mask_allowed |= 1 << OVS_KEY_ATTR_ARP;
156 }
157
25cd9ba0
SH		 158 if (eth_p_mpls(match->key->eth.type)) {
159 key_expected |= 1 << OVS_KEY_ATTR_MPLS;
160 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
161 mask_allowed |= 1 << OVS_KEY_ATTR_MPLS;
162 }
163
e6445719
PS		 164 if (match->key->eth.type == htons(ETH_P_IP)) {
165 key_expected |= 1 << OVS_KEY_ATTR_IPV4;
9dd7f890 166 if (match->mask && match->mask->key.eth.type == htons(0xffff)) {
e6445719 167 mask_allowed |= 1 << OVS_KEY_ATTR_IPV4;
9dd7f890
JR		 168 mask_allowed |= 1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4;
169 }
e6445719
PS		 170
171 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
172 if (match->key->ip.proto == IPPROTO_UDP) {
173 key_expected |= 1 << OVS_KEY_ATTR_UDP;
174 if (match->mask && (match->mask->key.ip.proto == 0xff))
175 mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
176 }
177
178 if (match->key->ip.proto == IPPROTO_SCTP) {
179 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
180 if (match->mask && (match->mask->key.ip.proto == 0xff))
181 mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
182 }
183
184 if (match->key->ip.proto == IPPROTO_TCP) {
185 key_expected |= 1 << OVS_KEY_ATTR_TCP;
5eb26b15
JR		 186 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
187 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
e6445719 188 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
5eb26b15
JR		 189 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
190 }
e6445719
PS		 191 }
192
193 if (match->key->ip.proto == IPPROTO_ICMP) {
194 key_expected |= 1 << OVS_KEY_ATTR_ICMP;
195 if (match->mask && (match->mask->key.ip.proto == 0xff))
196 mask_allowed |= 1 << OVS_KEY_ATTR_ICMP;
197 }
198 }
199 }
200
201 if (match->key->eth.type == htons(ETH_P_IPV6)) {
202 key_expected |= 1 << OVS_KEY_ATTR_IPV6;
9dd7f890 203 if (match->mask && match->mask->key.eth.type == htons(0xffff)) {
e6445719 204 mask_allowed |= 1 << OVS_KEY_ATTR_IPV6;
9dd7f890
JR		 205 mask_allowed |= 1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6;
206 }
e6445719
PS		 207
208 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
209 if (match->key->ip.proto == IPPROTO_UDP) {
210 key_expected |= 1 << OVS_KEY_ATTR_UDP;
211 if (match->mask && (match->mask->key.ip.proto == 0xff))
212 mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
213 }
214
215 if (match->key->ip.proto == IPPROTO_SCTP) {
216 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
217 if (match->mask && (match->mask->key.ip.proto == 0xff))
218 mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
219 }
220
221 if (match->key->ip.proto == IPPROTO_TCP) {
222 key_expected |= 1 << OVS_KEY_ATTR_TCP;
5eb26b15
JR		 223 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
224 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
e6445719 225 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
5eb26b15
JR		 226 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
227 }
e6445719
PS		 228 }
229
230 if (match->key->ip.proto == IPPROTO_ICMPV6) {
231 key_expected |= 1 << OVS_KEY_ATTR_ICMPV6;
232 if (match->mask && (match->mask->key.ip.proto == 0xff))
233 mask_allowed |= 1 << OVS_KEY_ATTR_ICMPV6;
234
1139e241 235 if (match->key->tp.src ==
e6445719 236 htons(NDISC_NEIGHBOUR_SOLICITATION) ||
1139e241 237 match->key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) {
e6445719 238 key_expected |= 1 << OVS_KEY_ATTR_ND;
9dd7f890
JR		 239 /* Original direction conntrack tuple
240 * uses the same space as the ND fields
241 * in the key, so both are not allowed
242 * at the same time.
243 */
244 mask_allowed &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6);
f2a01517 245 if (match->mask && (match->mask->key.tp.src == htons(0xff)))
e6445719
PS		 246 mask_allowed |= 1 << OVS_KEY_ATTR_ND;
247 }
248 }
249 }
250 }
251
252 if ((key_attrs & key_expected) != key_expected) {
253 /* Key attributes check failed. */
05da5898
JR		 254 OVS_NLERR(log, "Missing key (keys=%llx, expected=%llx)",
255 (unsigned long long)key_attrs,
256 (unsigned long long)key_expected);
e6445719
PS		 257 return false;
258 }
259
260 if ((mask_attrs & mask_allowed) != mask_attrs) {
261 /* Mask attributes check failed. */
05da5898
JR		 262 OVS_NLERR(log, "Unexpected mask (mask=%llx, allowed=%llx)",
263 (unsigned long long)mask_attrs,
264 (unsigned long long)mask_allowed);
e6445719
PS		 265 return false;
266 }
267
268 return true;
269}
270
8f0aad6f
WZ		 271size_t ovs_tun_key_attr_size(void)
272{
273 /* Whenever adding new OVS_TUNNEL_KEY_ FIELDS, we should consider
274 * updating this function.
275 */
b46f6ded 276 return nla_total_size_64bit(8) /* OVS_TUNNEL_KEY_ATTR_ID */
6b26ba3a
JB		 277 + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_SRC */
278 + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_DST */
8f0aad6f
WZ		 279 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */
280 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */
281 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */
282 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */
283 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_OAM */
284 + nla_total_size(256) /* OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS */
1dd144cf
TG		 285 /* OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS is mutually exclusive with
286 * OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS and covered by it.
287 */
8f0aad6f
WZ		 288 + nla_total_size(2) /* OVS_TUNNEL_KEY_ATTR_TP_SRC */
289 + nla_total_size(2); /* OVS_TUNNEL_KEY_ATTR_TP_DST */
290}
291
41af73e9
JS		 292size_t ovs_key_attr_size(void)
293{
294 /* Whenever adding new OVS_KEY_ FIELDS, we should consider
295 * updating this function.
296 */
9dd7f890 297 BUILD_BUG_ON(OVS_KEY_ATTR_TUNNEL_INFO != 28);
41af73e9
JS		 298
299 return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */
300 + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */
8f0aad6f 301 + ovs_tun_key_attr_size()
41af73e9
JS		 302 + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */
303 + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */
304 + nla_total_size(4) /* OVS_KEY_ATTR_DP_HASH */
305 + nla_total_size(4) /* OVS_KEY_ATTR_RECIRC_ID */
fbccce59 306 + nla_total_size(4) /* OVS_KEY_ATTR_CT_STATE */
7f8a436e 307 + nla_total_size(2) /* OVS_KEY_ATTR_CT_ZONE */
182e3042 308 + nla_total_size(4) /* OVS_KEY_ATTR_CT_MARK */
33db4125 309 + nla_total_size(16) /* OVS_KEY_ATTR_CT_LABELS */
9dd7f890 310 + nla_total_size(40) /* OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6 */
41af73e9
JS		 311 + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */
312 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
313 + nla_total_size(4) /* OVS_KEY_ATTR_VLAN */
314 + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */
315 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
316 + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */
317 + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */
318 + nla_total_size(28); /* OVS_KEY_ATTR_ND */
319}
320
982b5270
JG		 321static const struct ovs_len_tbl ovs_vxlan_ext_key_lens[OVS_VXLAN_EXT_MAX + 1] = {
322 [OVS_VXLAN_EXT_GBP] = { .len = sizeof(u32) },
323};
324
81bfe3c3
TG		 325static const struct ovs_len_tbl ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = {
326 [OVS_TUNNEL_KEY_ATTR_ID] = { .len = sizeof(u64) },
327 [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = { .len = sizeof(u32) },
328 [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = { .len = sizeof(u32) },
329 [OVS_TUNNEL_KEY_ATTR_TOS] = { .len = 1 },
330 [OVS_TUNNEL_KEY_ATTR_TTL] = { .len = 1 },
331 [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = { .len = 0 },
332 [OVS_TUNNEL_KEY_ATTR_CSUM] = { .len = 0 },
333 [OVS_TUNNEL_KEY_ATTR_TP_SRC] = { .len = sizeof(u16) },
334 [OVS_TUNNEL_KEY_ATTR_TP_DST] = { .len = sizeof(u16) },
335 [OVS_TUNNEL_KEY_ATTR_OAM] = { .len = 0 },
982b5270
JG		 336 [OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS] = { .len = OVS_ATTR_VARIABLE },
337 [OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS] = { .len = OVS_ATTR_NESTED,
338 .next = ovs_vxlan_ext_key_lens },
6b26ba3a
JB		 339 [OVS_TUNNEL_KEY_ATTR_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
340 [OVS_TUNNEL_KEY_ATTR_IPV6_DST] = { .len = sizeof(struct in6_addr) },
81bfe3c3
TG		 341};
342
e6445719 343/* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */
81bfe3c3
TG		 344static const struct ovs_len_tbl ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = {
345 [OVS_KEY_ATTR_ENCAP] = { .len = OVS_ATTR_NESTED },
346 [OVS_KEY_ATTR_PRIORITY] = { .len = sizeof(u32) },
347 [OVS_KEY_ATTR_IN_PORT] = { .len = sizeof(u32) },
348 [OVS_KEY_ATTR_SKB_MARK] = { .len = sizeof(u32) },
349 [OVS_KEY_ATTR_ETHERNET] = { .len = sizeof(struct ovs_key_ethernet) },
350 [OVS_KEY_ATTR_VLAN] = { .len = sizeof(__be16) },
351 [OVS_KEY_ATTR_ETHERTYPE] = { .len = sizeof(__be16) },
352 [OVS_KEY_ATTR_IPV4] = { .len = sizeof(struct ovs_key_ipv4) },
353 [OVS_KEY_ATTR_IPV6] = { .len = sizeof(struct ovs_key_ipv6) },
354 [OVS_KEY_ATTR_TCP] = { .len = sizeof(struct ovs_key_tcp) },
355 [OVS_KEY_ATTR_TCP_FLAGS] = { .len = sizeof(__be16) },
356 [OVS_KEY_ATTR_UDP] = { .len = sizeof(struct ovs_key_udp) },
357 [OVS_KEY_ATTR_SCTP] = { .len = sizeof(struct ovs_key_sctp) },
358 [OVS_KEY_ATTR_ICMP] = { .len = sizeof(struct ovs_key_icmp) },
359 [OVS_KEY_ATTR_ICMPV6] = { .len = sizeof(struct ovs_key_icmpv6) },
360 [OVS_KEY_ATTR_ARP] = { .len = sizeof(struct ovs_key_arp) },
361 [OVS_KEY_ATTR_ND] = { .len = sizeof(struct ovs_key_nd) },
362 [OVS_KEY_ATTR_RECIRC_ID] = { .len = sizeof(u32) },
363 [OVS_KEY_ATTR_DP_HASH] = { .len = sizeof(u32) },
364 [OVS_KEY_ATTR_TUNNEL] = { .len = OVS_ATTR_NESTED,
365 .next = ovs_tunnel_key_lens, },
366 [OVS_KEY_ATTR_MPLS] = { .len = sizeof(struct ovs_key_mpls) },
fbccce59 367 [OVS_KEY_ATTR_CT_STATE] = { .len = sizeof(u32) },
7f8a436e 368 [OVS_KEY_ATTR_CT_ZONE] = { .len = sizeof(u16) },
182e3042 369 [OVS_KEY_ATTR_CT_MARK] = { .len = sizeof(u32) },
33db4125 370 [OVS_KEY_ATTR_CT_LABELS] = { .len = sizeof(struct ovs_key_ct_labels) },
9dd7f890
JR		 371 [OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4] = {
372 .len = sizeof(struct ovs_key_ct_tuple_ipv4) },
373 [OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6] = {
374 .len = sizeof(struct ovs_key_ct_tuple_ipv6) },
e6445719
PS		 375};
376
982b5270
JG		 377static bool check_attr_len(unsigned int attr_len, unsigned int expected_len)
378{
379 return expected_len == attr_len ||
380 expected_len == OVS_ATTR_NESTED ||
381 expected_len == OVS_ATTR_VARIABLE;
382}
383
e6445719
PS		 384static bool is_all_zero(const u8 *fp, size_t size)
385{
386 int i;
387
388 if (!fp)
389 return false;
390
391 for (i = 0; i < size; i++)
392 if (fp[i])
393 return false;
394
395 return true;
396}
397
398static int __parse_flow_nlattrs(const struct nlattr *attr,
399 const struct nlattr *a[],
05da5898 400 u64 *attrsp, bool log, bool nz)
e6445719
PS		 401{
402 const struct nlattr *nla;
403 u64 attrs;
404 int rem;
405
406 attrs = *attrsp;
407 nla_for_each_nested(nla, attr, rem) {
408 u16 type = nla_type(nla);
409 int expected_len;
410
411 if (type > OVS_KEY_ATTR_MAX) {
05da5898 412 OVS_NLERR(log, "Key type %d is out of range max %d",
e6445719
PS		 413 type, OVS_KEY_ATTR_MAX);
414 return -EINVAL;
415 }
416
417 if (attrs & (1 << type)) {
05da5898 418 OVS_NLERR(log, "Duplicate key (type %d).", type);
e6445719
PS		 419 return -EINVAL;
420 }
421
81bfe3c3 422 expected_len = ovs_key_lens[type].len;
982b5270 423 if (!check_attr_len(nla_len(nla), expected_len)) {
05da5898
JR		 424 OVS_NLERR(log, "Key %d has unexpected len %d expected %d",
425 type, nla_len(nla), expected_len);
e6445719
PS		 426 return -EINVAL;
427 }
428
429 if (!nz || !is_all_zero(nla_data(nla), expected_len)) {
430 attrs |= 1 << type;
431 a[type] = nla;
432 }
433 }
434 if (rem) {
05da5898 435 OVS_NLERR(log, "Message has %d unknown bytes.", rem);
e6445719
PS		 436 return -EINVAL;
437 }
438
439 *attrsp = attrs;
440 return 0;
441}
442
443static int parse_flow_mask_nlattrs(const struct nlattr *attr,
05da5898
JR		 444 const struct nlattr *a[], u64 *attrsp,
445 bool log)
e6445719 446{
05da5898 447 return __parse_flow_nlattrs(attr, a, attrsp, log, true);
e6445719
PS		 448}
449
9dd7f890
JR		 450int parse_flow_nlattrs(const struct nlattr *attr, const struct nlattr *a[],
451 u64 *attrsp, bool log)
e6445719 452{
05da5898
JR		 453 return __parse_flow_nlattrs(attr, a, attrsp, log, false);
454}
455
456static int genev_tun_opt_from_nlattr(const struct nlattr *a,
457 struct sw_flow_match *match, bool is_mask,
458 bool log)
459{
460 unsigned long opt_key_offset;
461
462 if (nla_len(a) > sizeof(match->key->tun_opts)) {
463 OVS_NLERR(log, "Geneve option length err (len %d, max %zu).",
464 nla_len(a), sizeof(match->key->tun_opts));
465 return -EINVAL;
466 }
467
468 if (nla_len(a) % 4 != 0) {
469 OVS_NLERR(log, "Geneve opt len %d is not a multiple of 4.",
470 nla_len(a));
471 return -EINVAL;
472 }
473
474 /* We need to record the length of the options passed
475 * down, otherwise packets with the same format but
476 * additional options will be silently matched.
477 */
478 if (!is_mask) {
479 SW_FLOW_KEY_PUT(match, tun_opts_len, nla_len(a),
480 false);
481 } else {
482 /* This is somewhat unusual because it looks at
483 * both the key and mask while parsing the
484 * attributes (and by extension assumes the key
485 * is parsed first). Normally, we would verify
486 * that each is the correct length and that the
487 * attributes line up in the validate function.
488 * However, that is difficult because this is
489 * variable length and we won't have the
490 * information later.
491 */
492 if (match->key->tun_opts_len != nla_len(a)) {
493 OVS_NLERR(log, "Geneve option len %d != mask len %d",
494 match->key->tun_opts_len, nla_len(a));
495 return -EINVAL;
496 }
497
498 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
499 }
500
d91641d9 501 opt_key_offset = TUN_METADATA_OFFSET(nla_len(a));
05da5898
JR		 502 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, nla_data(a),
503 nla_len(a), is_mask);
504 return 0;
e6445719
PS		 505}
506
982b5270 507static int vxlan_tun_opt_from_nlattr(const struct nlattr *attr,
1dd144cf
TG		 508 struct sw_flow_match *match, bool is_mask,
509 bool log)
510{
982b5270
JG		 511 struct nlattr *a;
512 int rem;
1dd144cf 513 unsigned long opt_key_offset;
614732ea 514 struct vxlan_metadata opts;
1dd144cf
TG		 515
516 BUILD_BUG_ON(sizeof(opts) > sizeof(match->key->tun_opts));
517
1dd144cf 518 memset(&opts, 0, sizeof(opts));
982b5270
JG		 519 nla_for_each_nested(a, attr, rem) {
520 int type = nla_type(a);
1dd144cf 521
982b5270
JG		 522 if (type > OVS_VXLAN_EXT_MAX) {
523 OVS_NLERR(log, "VXLAN extension %d out of range max %d",
524 type, OVS_VXLAN_EXT_MAX);
525 return -EINVAL;
526 }
527
528 if (!check_attr_len(nla_len(a),
529 ovs_vxlan_ext_key_lens[type].len)) {
530 OVS_NLERR(log, "VXLAN extension %d has unexpected len %d expected %d",
531 type, nla_len(a),
532 ovs_vxlan_ext_key_lens[type].len);
533 return -EINVAL;
534 }
535
536 switch (type) {
537 case OVS_VXLAN_EXT_GBP:
538 opts.gbp = nla_get_u32(a);
539 break;
540 default:
541 OVS_NLERR(log, "Unknown VXLAN extension attribute %d",
542 type);
543 return -EINVAL;
544 }
545 }
546 if (rem) {
547 OVS_NLERR(log, "VXLAN extension message has %d unknown bytes.",
548 rem);
549 return -EINVAL;
550 }
1dd144cf
TG		 551
552 if (!is_mask)
553 SW_FLOW_KEY_PUT(match, tun_opts_len, sizeof(opts), false);
554 else
555 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
556
557 opt_key_offset = TUN_METADATA_OFFSET(sizeof(opts));
558 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, &opts, sizeof(opts),
559 is_mask);
560 return 0;
561}
562
6b26ba3a
JB		 563static int ip_tun_from_nlattr(const struct nlattr *attr,
564 struct sw_flow_match *match, bool is_mask,
565 bool log)
e6445719 566{
99e28f18
PS		 567 bool ttl = false, ipv4 = false, ipv6 = false;
568 __be16 tun_flags = 0;
569 int opts_type = 0;
e6445719
PS		 570 struct nlattr *a;
571 int rem;
e6445719
PS		 572
573 nla_for_each_nested(a, attr, rem) {
574 int type = nla_type(a);
05da5898
JR		 575 int err;
576
e6445719 577 if (type > OVS_TUNNEL_KEY_ATTR_MAX) {
05da5898
JR		 578 OVS_NLERR(log, "Tunnel attr %d out of range max %d",
579 type, OVS_TUNNEL_KEY_ATTR_MAX);
e6445719
PS		 580 return -EINVAL;
581 }
582
982b5270
JG		 583 if (!check_attr_len(nla_len(a),
584 ovs_tunnel_key_lens[type].len)) {
05da5898 585 OVS_NLERR(log, "Tunnel attr %d has unexpected len %d expected %d",
81bfe3c3 586 type, nla_len(a), ovs_tunnel_key_lens[type].len);
e6445719
PS		 587 return -EINVAL;
588 }
589
590 switch (type) {
591 case OVS_TUNNEL_KEY_ATTR_ID:
592 SW_FLOW_KEY_PUT(match, tun_key.tun_id,
593 nla_get_be64(a), is_mask);
594 tun_flags |= TUNNEL_KEY;
595 break;
596 case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
c1ea5d67 597 SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.src,
67b61f6c 598 nla_get_in_addr(a), is_mask);
6b26ba3a 599 ipv4 = true;
e6445719
PS		 600 break;
601 case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
c1ea5d67 602 SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.dst,
67b61f6c 603 nla_get_in_addr(a), is_mask);
6b26ba3a
JB		 604 ipv4 = true;
605 break;
606 case OVS_TUNNEL_KEY_ATTR_IPV6_SRC:
3d20f1f7 607 SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.src,
6b26ba3a
JB		 608 nla_get_in6_addr(a), is_mask);
609 ipv6 = true;
610 break;
611 case OVS_TUNNEL_KEY_ATTR_IPV6_DST:
612 SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.dst,
613 nla_get_in6_addr(a), is_mask);
614 ipv6 = true;
e6445719
PS		 615 break;
616 case OVS_TUNNEL_KEY_ATTR_TOS:
7c383fb2 617 SW_FLOW_KEY_PUT(match, tun_key.tos,
e6445719
PS		 618 nla_get_u8(a), is_mask);
619 break;
620 case OVS_TUNNEL_KEY_ATTR_TTL:
7c383fb2 621 SW_FLOW_KEY_PUT(match, tun_key.ttl,
e6445719
PS		 622 nla_get_u8(a), is_mask);
623 ttl = true;
624 break;
625 case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
626 tun_flags |= TUNNEL_DONT_FRAGMENT;
627 break;
628 case OVS_TUNNEL_KEY_ATTR_CSUM:
629 tun_flags |= TUNNEL_CSUM;
630 break;
8f0aad6f
WZ		 631 case OVS_TUNNEL_KEY_ATTR_TP_SRC:
632 SW_FLOW_KEY_PUT(match, tun_key.tp_src,
633 nla_get_be16(a), is_mask);
634 break;
635 case OVS_TUNNEL_KEY_ATTR_TP_DST:
636 SW_FLOW_KEY_PUT(match, tun_key.tp_dst,
637 nla_get_be16(a), is_mask);
638 break;
67fa0341
JG		 639 case OVS_TUNNEL_KEY_ATTR_OAM:
640 tun_flags |= TUNNEL_OAM;
641 break;
f5796684 642 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
1dd144cf
TG		 643 if (opts_type) {
644 OVS_NLERR(log, "Multiple metadata blocks provided");
645 return -EINVAL;
646 }
647
05da5898
JR		 648 err = genev_tun_opt_from_nlattr(a, match, is_mask, log);
649 if (err)
650 return err;
f5796684 651
1dd144cf
TG		 652 tun_flags |= TUNNEL_GENEVE_OPT;
653 opts_type = type;
654 break;
655 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
656 if (opts_type) {
657 OVS_NLERR(log, "Multiple metadata blocks provided");
658 return -EINVAL;
659 }
660
661 err = vxlan_tun_opt_from_nlattr(a, match, is_mask, log);
662 if (err)
663 return err;
664
665 tun_flags |= TUNNEL_VXLAN_OPT;
666 opts_type = type;
f5796684 667 break;
8f3dbfd7
KM		 668 case OVS_TUNNEL_KEY_ATTR_PAD:
669 break;
e6445719 670 default:
6b26ba3a 671 OVS_NLERR(log, "Unknown IP tunnel attribute %d",
f5796684 672 type);
e6445719
PS		 673 return -EINVAL;
674 }
675 }
676
677 SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask);
00a93bab
JB		 678 if (is_mask)
679 SW_FLOW_KEY_MEMSET_FIELD(match, tun_proto, 0xff, true);
680 else
6b26ba3a
JB		 681 SW_FLOW_KEY_PUT(match, tun_proto, ipv6 ? AF_INET6 : AF_INET,
682 false);
e6445719
PS		 683
684 if (rem > 0) {
6b26ba3a 685 OVS_NLERR(log, "IP tunnel attribute has %d unknown bytes.",
05da5898 686 rem);
e6445719
PS		 687 return -EINVAL;
688 }
689
6b26ba3a
JB		 690 if (ipv4 && ipv6) {
691 OVS_NLERR(log, "Mixed IPv4 and IPv6 tunnel attributes");
692 return -EINVAL;
693 }
694
e6445719 695 if (!is_mask) {
6b26ba3a
JB		 696 if (!ipv4 && !ipv6) {
697 OVS_NLERR(log, "IP tunnel dst address not specified");
698 return -EINVAL;
699 }
700 if (ipv4 && !match->key->tun_key.u.ipv4.dst) {
05da5898 701 OVS_NLERR(log, "IPv4 tunnel dst address is zero");
e6445719
PS		 702 return -EINVAL;
703 }
6b26ba3a
JB		 704 if (ipv6 && ipv6_addr_any(&match->key->tun_key.u.ipv6.dst)) {
705 OVS_NLERR(log, "IPv6 tunnel dst address is zero");
706 return -EINVAL;
707 }
e6445719
PS		 708
709 if (!ttl) {
6b26ba3a 710 OVS_NLERR(log, "IP tunnel TTL not specified.");
e6445719
PS		 711 return -EINVAL;
712 }
713 }
714
1dd144cf
TG		 715 return opts_type;
716}
717
718static int vxlan_opt_to_nlattr(struct sk_buff *skb,
719 const void *tun_opts, int swkey_tun_opts_len)
720{
614732ea 721 const struct vxlan_metadata *opts = tun_opts;
1dd144cf
TG		 722 struct nlattr *nla;
723
724 nla = nla_nest_start(skb, OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS);
725 if (!nla)
726 return -EMSGSIZE;
727
728 if (nla_put_u32(skb, OVS_VXLAN_EXT_GBP, opts->gbp) < 0)
729 return -EMSGSIZE;
730
731 nla_nest_end(skb, nla);
e6445719
PS		 732 return 0;
733}
734
6b26ba3a
JB		 735static int __ip_tun_to_nlattr(struct sk_buff *skb,
736 const struct ip_tunnel_key *output,
737 const void *tun_opts, int swkey_tun_opts_len,
738 unsigned short tun_proto)
e6445719 739{
e6445719 740 if (output->tun_flags & TUNNEL_KEY &&
b46f6ded
ND		 741 nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id,
742 OVS_TUNNEL_KEY_ATTR_PAD))
e6445719 743 return -EMSGSIZE;
6b26ba3a
JB		 744 switch (tun_proto) {
745 case AF_INET:
746 if (output->u.ipv4.src &&
747 nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC,
748 output->u.ipv4.src))
749 return -EMSGSIZE;
750 if (output->u.ipv4.dst &&
751 nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST,
752 output->u.ipv4.dst))
753 return -EMSGSIZE;
754 break;
755 case AF_INET6:
756 if (!ipv6_addr_any(&output->u.ipv6.src) &&
757 nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_SRC,
758 &output->u.ipv6.src))
759 return -EMSGSIZE;
760 if (!ipv6_addr_any(&output->u.ipv6.dst) &&
761 nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_DST,
762 &output->u.ipv6.dst))
763 return -EMSGSIZE;
764 break;
765 }
7c383fb2
JB		 766 if (output->tos &&
767 nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->tos))
e6445719 768 return -EMSGSIZE;
7c383fb2 769 if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ttl))
e6445719
PS		 770 return -EMSGSIZE;
771 if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) &&
67fa0341 772 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT))
e6445719
PS		 773 return -EMSGSIZE;
774 if ((output->tun_flags & TUNNEL_CSUM) &&
67fa0341
JG		 775 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM))
776 return -EMSGSIZE;
8f0aad6f
WZ		 777 if (output->tp_src &&
778 nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_SRC, output->tp_src))
779 return -EMSGSIZE;
780 if (output->tp_dst &&
781 nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_DST, output->tp_dst))
782 return -EMSGSIZE;
67fa0341
JG		 783 if ((output->tun_flags & TUNNEL_OAM) &&
784 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM))
e6445719 785 return -EMSGSIZE;
fc4099f1 786 if (swkey_tun_opts_len) {
1dd144cf
TG		 787 if (output->tun_flags & TUNNEL_GENEVE_OPT &&
788 nla_put(skb, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS,
789 swkey_tun_opts_len, tun_opts))
790 return -EMSGSIZE;
791 else if (output->tun_flags & TUNNEL_VXLAN_OPT &&
792 vxlan_opt_to_nlattr(skb, tun_opts, swkey_tun_opts_len))
793 return -EMSGSIZE;
794 }
e6445719 795
e6445719
PS		 796 return 0;
797}
798
6b26ba3a
JB		 799static int ip_tun_to_nlattr(struct sk_buff *skb,
800 const struct ip_tunnel_key *output,
801 const void *tun_opts, int swkey_tun_opts_len,
802 unsigned short tun_proto)
f5796684
JG		 803{
804 struct nlattr *nla;
805 int err;
806
807 nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL);
808 if (!nla)
809 return -EMSGSIZE;
810
6b26ba3a
JB		 811 err = __ip_tun_to_nlattr(skb, output, tun_opts, swkey_tun_opts_len,
812 tun_proto);
f5796684
JG		 813 if (err)
814 return err;
815
816 nla_nest_end(skb, nla);
817 return 0;
818}
819
fc4099f1
PS		 820int ovs_nla_put_tunnel_info(struct sk_buff *skb,
821 struct ip_tunnel_info *tun_info)
8f0aad6f 822{
ba3e2084
DM		 823 return __ip_tun_to_nlattr(skb, &tun_info->key,
824 ip_tunnel_info_opts(tun_info),
825 tun_info->options_len,
826 ip_tunnel_info_af(tun_info));
8f0aad6f
WZ		 827}
828
018c1dda
EG		 829static int encode_vlan_from_nlattrs(struct sw_flow_match *match,
830 const struct nlattr *a[],
831 bool is_mask, bool inner)
832{
833 __be16 tci = 0;
834 __be16 tpid = 0;
835
836 if (a[OVS_KEY_ATTR_VLAN])
837 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
838
839 if (a[OVS_KEY_ATTR_ETHERTYPE])
840 tpid = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
841
842 if (likely(!inner)) {
843 SW_FLOW_KEY_PUT(match, eth.vlan.tpid, tpid, is_mask);
844 SW_FLOW_KEY_PUT(match, eth.vlan.tci, tci, is_mask);
845 } else {
846 SW_FLOW_KEY_PUT(match, eth.cvlan.tpid, tpid, is_mask);
847 SW_FLOW_KEY_PUT(match, eth.cvlan.tci, tci, is_mask);
848 }
849 return 0;
850}
851
852static int validate_vlan_from_nlattrs(const struct sw_flow_match *match,
853 u64 key_attrs, bool inner,
854 const struct nlattr **a, bool log)
855{
856 __be16 tci = 0;
857
858 if (!((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) &&
859 (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) &&
860 eth_type_vlan(nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE])))) {
861 /* Not a VLAN. */
862 return 0;
863 }
864
865 if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) &&
866 (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) {
867 OVS_NLERR(log, "Invalid %s frame", (inner) ? "C-VLAN" : "VLAN");
868 return -EINVAL;
869 }
870
871 if (a[OVS_KEY_ATTR_VLAN])
872 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
873
874 if (!(tci & htons(VLAN_TAG_PRESENT))) {
875 if (tci) {
876 OVS_NLERR(log, "%s TCI does not have VLAN_TAG_PRESENT bit set.",
877 (inner) ? "C-VLAN" : "VLAN");
878 return -EINVAL;
879 } else if (nla_len(a[OVS_KEY_ATTR_ENCAP])) {
880 /* Corner case for truncated VLAN header. */
881 OVS_NLERR(log, "Truncated %s header has non-zero encap attribute.",
882 (inner) ? "C-VLAN" : "VLAN");
883 return -EINVAL;
884 }
885 }
886
887 return 1;
888}
889
890static int validate_vlan_mask_from_nlattrs(const struct sw_flow_match *match,
891 u64 key_attrs, bool inner,
892 const struct nlattr **a, bool log)
893{
894 __be16 tci = 0;
895 __be16 tpid = 0;
896 bool encap_valid = !!(match->key->eth.vlan.tci &
897 htons(VLAN_TAG_PRESENT));
898 bool i_encap_valid = !!(match->key->eth.cvlan.tci &
899 htons(VLAN_TAG_PRESENT));
900
901 if (!(key_attrs & (1 << OVS_KEY_ATTR_ENCAP))) {
902 /* Not a VLAN. */
903 return 0;
904 }
905
906 if ((!inner && !encap_valid) || (inner && !i_encap_valid)) {
907 OVS_NLERR(log, "Encap mask attribute is set for non-%s frame.",
908 (inner) ? "C-VLAN" : "VLAN");
909 return -EINVAL;
910 }
911
912 if (a[OVS_KEY_ATTR_VLAN])
913 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
914
915 if (a[OVS_KEY_ATTR_ETHERTYPE])
916 tpid = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
917
918 if (tpid != htons(0xffff)) {
919 OVS_NLERR(log, "Must have an exact match on %s TPID (mask=%x).",
920 (inner) ? "C-VLAN" : "VLAN", ntohs(tpid));
921 return -EINVAL;
922 }
923 if (!(tci & htons(VLAN_TAG_PRESENT))) {
924 OVS_NLERR(log, "%s TCI mask does not have exact match for VLAN_TAG_PRESENT bit.",
925 (inner) ? "C-VLAN" : "VLAN");
926 return -EINVAL;
927 }
928
929 return 1;
930}
931
932static int __parse_vlan_from_nlattrs(struct sw_flow_match *match,
933 u64 *key_attrs, bool inner,
934 const struct nlattr **a, bool is_mask,
935 bool log)
936{
937 int err;
938 const struct nlattr *encap;
939
940 if (!is_mask)
941 err = validate_vlan_from_nlattrs(match, *key_attrs, inner,
942 a, log);
943 else
944 err = validate_vlan_mask_from_nlattrs(match, *key_attrs, inner,
945 a, log);
946 if (err <= 0)
947 return err;
948
949 err = encode_vlan_from_nlattrs(match, a, is_mask, inner);
950 if (err)
951 return err;
952
953 *key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP);
954 *key_attrs &= ~(1 << OVS_KEY_ATTR_VLAN);
955 *key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
956
957 encap = a[OVS_KEY_ATTR_ENCAP];
958
959 if (!is_mask)
960 err = parse_flow_nlattrs(encap, a, key_attrs, log);
961 else
962 err = parse_flow_mask_nlattrs(encap, a, key_attrs, log);
963
964 return err;
965}
966
967static int parse_vlan_from_nlattrs(struct sw_flow_match *match,
968 u64 *key_attrs, const struct nlattr **a,
969 bool is_mask, bool log)
970{
971 int err;
972 bool encap_valid = false;
973
974 err = __parse_vlan_from_nlattrs(match, key_attrs, false, a,
975 is_mask, log);
976 if (err)
977 return err;
978
979 encap_valid = !!(match->key->eth.vlan.tci & htons(VLAN_TAG_PRESENT));
980 if (encap_valid) {
981 err = __parse_vlan_from_nlattrs(match, key_attrs, true, a,
982 is_mask, log);
983 if (err)
984 return err;
985 }
986
987 return 0;
988}
989
0a6410fb
JB		 990static int parse_eth_type_from_nlattrs(struct sw_flow_match *match,
991 u64 *attrs, const struct nlattr **a,
992 bool is_mask, bool log)
993{
994 __be16 eth_type;
995
996 eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
997 if (is_mask) {
998 /* Always exact match EtherType. */
999 eth_type = htons(0xffff);
1000 } else if (!eth_proto_is_802_3(eth_type)) {
1001 OVS_NLERR(log, "EtherType %x is less than min %x",
1002 ntohs(eth_type), ETH_P_802_3_MIN);
1003 return -EINVAL;
1004 }
1005
1006 SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask);
1007 *attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
1008 return 0;
1009}
1010
c2ac6673
JS		 1011static int metadata_from_nlattrs(struct net *net, struct sw_flow_match *match,
1012 u64 *attrs, const struct nlattr **a,
1013 bool is_mask, bool log)
e6445719 1014{
0a6410fb
JB		 1015 u8 mac_proto = MAC_PROTO_ETHERNET;
1016
971427f3
AZ		 1017 if (*attrs & (1 << OVS_KEY_ATTR_DP_HASH)) {
1018 u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]);
1019
1020 SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask);
1021 *attrs &= ~(1 << OVS_KEY_ATTR_DP_HASH);
1022 }
1023
1024 if (*attrs & (1 << OVS_KEY_ATTR_RECIRC_ID)) {
1025 u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]);
1026
1027 SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask);
1028 *attrs &= ~(1 << OVS_KEY_ATTR_RECIRC_ID);
1029 }
1030
e6445719
PS		 1031 if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) {
1032 SW_FLOW_KEY_PUT(match, phy.priority,
1033 nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask);
1034 *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY);
1035 }
1036
1037 if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) {
1038 u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]);
1039
426cda5c 1040 if (is_mask) {
e6445719 1041 in_port = 0xffffffff; /* Always exact match in_port. */
426cda5c 1042 } else if (in_port >= DP_MAX_PORTS) {
05da5898 1043 OVS_NLERR(log, "Port %d exceeds max allowable %d",
426cda5c 1044 in_port, DP_MAX_PORTS);
e6445719 1045 return -EINVAL;
426cda5c 1046 }
e6445719
PS		 1047
1048 SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask);
1049 *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT);
1050 } else if (!is_mask) {
1051 SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask);
1052 }
1053
1054 if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) {
1055 uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]);
1056
1057 SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask);
1058 *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK);
1059 }
1060 if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) {
6b26ba3a
JB		 1061 if (ip_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match,
1062 is_mask, log) < 0)
e6445719
PS		 1063 return -EINVAL;
1064 *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL);
1065 }
7f8a436e
JS		 1066
1067 if (*attrs & (1 << OVS_KEY_ATTR_CT_STATE) &&
c2ac6673 1068 ovs_ct_verify(net, OVS_KEY_ATTR_CT_STATE)) {
fbccce59 1069 u32 ct_state = nla_get_u32(a[OVS_KEY_ATTR_CT_STATE]);
7f8a436e 1070
9e384715 1071 if (ct_state & ~CT_SUPPORTED_MASK) {
fbccce59 1072 OVS_NLERR(log, "ct_state flags %08x unsupported",
6f225952
JS		 1073 ct_state);
1074 return -EINVAL;
1075 }
7f8a436e 1076
316d4d78 1077 SW_FLOW_KEY_PUT(match, ct_state, ct_state, is_mask);
7f8a436e
JS		 1078 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_STATE);
1079 }
1080 if (*attrs & (1 << OVS_KEY_ATTR_CT_ZONE) &&
c2ac6673 1081 ovs_ct_verify(net, OVS_KEY_ATTR_CT_ZONE)) {
7f8a436e
JS		 1082 u16 ct_zone = nla_get_u16(a[OVS_KEY_ATTR_CT_ZONE]);
1083
316d4d78 1084 SW_FLOW_KEY_PUT(match, ct_zone, ct_zone, is_mask);
7f8a436e
JS		 1085 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ZONE);
1086 }
182e3042 1087 if (*attrs & (1 << OVS_KEY_ATTR_CT_MARK) &&
c2ac6673 1088 ovs_ct_verify(net, OVS_KEY_ATTR_CT_MARK)) {
182e3042
JS		 1089 u32 mark = nla_get_u32(a[OVS_KEY_ATTR_CT_MARK]);
1090
1091 SW_FLOW_KEY_PUT(match, ct.mark, mark, is_mask);
1092 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_MARK);
1093 }
33db4125
JS		 1094 if (*attrs & (1 << OVS_KEY_ATTR_CT_LABELS) &&
1095 ovs_ct_verify(net, OVS_KEY_ATTR_CT_LABELS)) {
1096 const struct ovs_key_ct_labels *cl;
c2ac6673 1097
33db4125
JS		 1098 cl = nla_data(a[OVS_KEY_ATTR_CT_LABELS]);
1099 SW_FLOW_KEY_MEMCPY(match, ct.labels, cl->ct_labels,
c2ac6673 1100 sizeof(*cl), is_mask);
33db4125 1101 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_LABELS);
c2ac6673 1102 }
9dd7f890
JR		 1103 if (*attrs & (1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4)) {
1104 const struct ovs_key_ct_tuple_ipv4 *ct;
1105
1106 ct = nla_data(a[OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4]);
1107
1108 SW_FLOW_KEY_PUT(match, ipv4.ct_orig.src, ct->ipv4_src, is_mask);
1109 SW_FLOW_KEY_PUT(match, ipv4.ct_orig.dst, ct->ipv4_dst, is_mask);
1110 SW_FLOW_KEY_PUT(match, ct.orig_tp.src, ct->src_port, is_mask);
1111 SW_FLOW_KEY_PUT(match, ct.orig_tp.dst, ct->dst_port, is_mask);
316d4d78 1112 SW_FLOW_KEY_PUT(match, ct_orig_proto, ct->ipv4_proto, is_mask);
9dd7f890
JR		 1113 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4);
1114 }
1115 if (*attrs & (1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6)) {
1116 const struct ovs_key_ct_tuple_ipv6 *ct;
1117
1118 ct = nla_data(a[OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6]);
1119
1120 SW_FLOW_KEY_MEMCPY(match, ipv6.ct_orig.src, &ct->ipv6_src,
1121 sizeof(match->key->ipv6.ct_orig.src),
1122 is_mask);
1123 SW_FLOW_KEY_MEMCPY(match, ipv6.ct_orig.dst, &ct->ipv6_dst,
1124 sizeof(match->key->ipv6.ct_orig.dst),
1125 is_mask);
1126 SW_FLOW_KEY_PUT(match, ct.orig_tp.src, ct->src_port, is_mask);
1127 SW_FLOW_KEY_PUT(match, ct.orig_tp.dst, ct->dst_port, is_mask);
316d4d78 1128 SW_FLOW_KEY_PUT(match, ct_orig_proto, ct->ipv6_proto, is_mask);
9dd7f890
JR		 1129 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6);
1130 }
329f45bc 1131
0a6410fb
JB		 1132 /* For layer 3 packets the Ethernet type is provided
1133 * and treated as metadata but no MAC addresses are provided.
1134 */
1135 if (!(*attrs & (1ULL << OVS_KEY_ATTR_ETHERNET)) &&
1136 (*attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)))
1137 mac_proto = MAC_PROTO_NONE;
1138
329f45bc 1139 /* Always exact match mac_proto */
0a6410fb
JB		 1140 SW_FLOW_KEY_PUT(match, mac_proto, is_mask ? 0xff : mac_proto, is_mask);
1141
1142 if (mac_proto == MAC_PROTO_NONE)
1143 return parse_eth_type_from_nlattrs(match, attrs, a, is_mask,
1144 log);
329f45bc 1145
e6445719
PS		 1146 return 0;
1147}
1148
c2ac6673
JS		 1149static int ovs_key_from_nlattrs(struct net *net, struct sw_flow_match *match,
1150 u64 attrs, const struct nlattr **a,
1151 bool is_mask, bool log)
e6445719
PS		 1152{
1153 int err;
e6445719 1154
c2ac6673 1155 err = metadata_from_nlattrs(net, match, &attrs, a, is_mask, log);
e6445719
PS		 1156 if (err)
1157 return err;
1158
1159 if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) {
1160 const struct ovs_key_ethernet *eth_key;
1161
1162 eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]);
1163 SW_FLOW_KEY_MEMCPY(match, eth.src,
1164 eth_key->eth_src, ETH_ALEN, is_mask);
1165 SW_FLOW_KEY_MEMCPY(match, eth.dst,
1166 eth_key->eth_dst, ETH_ALEN, is_mask);
1167 attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET);
e6445719 1168
0a6410fb
JB		 1169 if (attrs & (1 << OVS_KEY_ATTR_VLAN)) {
1170 /* VLAN attribute is always parsed before getting here since it
1171 * may occur multiple times.
1172 */
1173 OVS_NLERR(log, "VLAN attribute unexpected.");
e6445719
PS		 1174 return -EINVAL;
1175 }
1176
0a6410fb
JB		 1177 if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) {
1178 err = parse_eth_type_from_nlattrs(match, &attrs, a, is_mask,
1179 log);
1180 if (err)
1181 return err;
1182 } else if (!is_mask) {
1183 SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask);
1184 }
1185 } else if (!match->key->eth.type) {
1186 OVS_NLERR(log, "Either Ethernet header or EtherType is required.");
1187 return -EINVAL;
e6445719
PS		 1188 }
1189
1190 if (attrs & (1 << OVS_KEY_ATTR_IPV4)) {
1191 const struct ovs_key_ipv4 *ipv4_key;
1192
1193 ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]);
1194 if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) {
05da5898
JR		 1195 OVS_NLERR(log, "IPv4 frag type %d is out of range max %d",
1196 ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX);
e6445719
PS		 1197 return -EINVAL;
1198 }
1199 SW_FLOW_KEY_PUT(match, ip.proto,
1200 ipv4_key->ipv4_proto, is_mask);
1201 SW_FLOW_KEY_PUT(match, ip.tos,
1202 ipv4_key->ipv4_tos, is_mask);
1203 SW_FLOW_KEY_PUT(match, ip.ttl,
1204 ipv4_key->ipv4_ttl, is_mask);
1205 SW_FLOW_KEY_PUT(match, ip.frag,
1206 ipv4_key->ipv4_frag, is_mask);
1207 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
1208 ipv4_key->ipv4_src, is_mask);
1209 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
1210 ipv4_key->ipv4_dst, is_mask);
1211 attrs &= ~(1 << OVS_KEY_ATTR_IPV4);
1212 }
1213
1214 if (attrs & (1 << OVS_KEY_ATTR_IPV6)) {
1215 const struct ovs_key_ipv6 *ipv6_key;
1216
1217 ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]);
1218 if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) {
05da5898
JR		 1219 OVS_NLERR(log, "IPv6 frag type %d is out of range max %d",
1220 ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX);
e6445719
PS		 1221 return -EINVAL;
1222 }
fecaef85 1223
d3052bb5 1224 if (!is_mask && ipv6_key->ipv6_label & htonl(0xFFF00000)) {
14591433 1225 OVS_NLERR(log, "IPv6 flow label %x is out of range (max=%x).\n",
fecaef85
JR		 1226 ntohl(ipv6_key->ipv6_label), (1 << 20) - 1);
1227 return -EINVAL;
1228 }
1229
e6445719
PS		 1230 SW_FLOW_KEY_PUT(match, ipv6.label,
1231 ipv6_key->ipv6_label, is_mask);
1232 SW_FLOW_KEY_PUT(match, ip.proto,
1233 ipv6_key->ipv6_proto, is_mask);
1234 SW_FLOW_KEY_PUT(match, ip.tos,
1235 ipv6_key->ipv6_tclass, is_mask);
1236 SW_FLOW_KEY_PUT(match, ip.ttl,
1237 ipv6_key->ipv6_hlimit, is_mask);
1238 SW_FLOW_KEY_PUT(match, ip.frag,
1239 ipv6_key->ipv6_frag, is_mask);
1240 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src,
1241 ipv6_key->ipv6_src,
1242 sizeof(match->key->ipv6.addr.src),
1243 is_mask);
1244 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst,
1245 ipv6_key->ipv6_dst,
1246 sizeof(match->key->ipv6.addr.dst),
1247 is_mask);
1248
1249 attrs &= ~(1 << OVS_KEY_ATTR_IPV6);
1250 }
1251
1252 if (attrs & (1 << OVS_KEY_ATTR_ARP)) {
1253 const struct ovs_key_arp *arp_key;
1254
1255 arp_key = nla_data(a[OVS_KEY_ATTR_ARP]);
1256 if (!is_mask && (arp_key->arp_op & htons(0xff00))) {
05da5898 1257 OVS_NLERR(log, "Unknown ARP opcode (opcode=%d).",
e6445719
PS		 1258 arp_key->arp_op);
1259 return -EINVAL;
1260 }
1261
1262 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
1263 arp_key->arp_sip, is_mask);
1264 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
1265 arp_key->arp_tip, is_mask);
1266 SW_FLOW_KEY_PUT(match, ip.proto,
1267 ntohs(arp_key->arp_op), is_mask);
1268 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha,
1269 arp_key->arp_sha, ETH_ALEN, is_mask);
1270 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha,
1271 arp_key->arp_tha, ETH_ALEN, is_mask);
1272
1273 attrs &= ~(1 << OVS_KEY_ATTR_ARP);
1274 }
1275
25cd9ba0
SH		 1276 if (attrs & (1 << OVS_KEY_ATTR_MPLS)) {
1277 const struct ovs_key_mpls *mpls_key;
1278
1279 mpls_key = nla_data(a[OVS_KEY_ATTR_MPLS]);
1280 SW_FLOW_KEY_PUT(match, mpls.top_lse,
1281 mpls_key->mpls_lse, is_mask);
1282
1283 attrs &= ~(1 << OVS_KEY_ATTR_MPLS);
1284 }
1285
e6445719
PS		 1286 if (attrs & (1 << OVS_KEY_ATTR_TCP)) {
1287 const struct ovs_key_tcp *tcp_key;
1288
1289 tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]);
1139e241
JR		 1290 SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask);
1291 SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask);
e6445719
PS		 1292 attrs &= ~(1 << OVS_KEY_ATTR_TCP);
1293 }
1294
5eb26b15 1295 if (attrs & (1 << OVS_KEY_ATTR_TCP_FLAGS)) {
1b760fb9
JS		 1296 SW_FLOW_KEY_PUT(match, tp.flags,
1297 nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]),
1298 is_mask);
5eb26b15
JR		 1299 attrs &= ~(1 << OVS_KEY_ATTR_TCP_FLAGS);
1300 }
1301
e6445719
PS		 1302 if (attrs & (1 << OVS_KEY_ATTR_UDP)) {
1303 const struct ovs_key_udp *udp_key;
1304
1305 udp_key = nla_data(a[OVS_KEY_ATTR_UDP]);
1139e241
JR		 1306 SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask);
1307 SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask);
e6445719
PS		 1308 attrs &= ~(1 << OVS_KEY_ATTR_UDP);
1309 }
1310
1311 if (attrs & (1 << OVS_KEY_ATTR_SCTP)) {
1312 const struct ovs_key_sctp *sctp_key;
1313
1314 sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]);
1139e241
JR		 1315 SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask);
1316 SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask);
e6445719
PS		 1317 attrs &= ~(1 << OVS_KEY_ATTR_SCTP);
1318 }
1319
1320 if (attrs & (1 << OVS_KEY_ATTR_ICMP)) {
1321 const struct ovs_key_icmp *icmp_key;
1322
1323 icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]);
1139e241 1324 SW_FLOW_KEY_PUT(match, tp.src,
e6445719 1325 htons(icmp_key->icmp_type), is_mask);
1139e241 1326 SW_FLOW_KEY_PUT(match, tp.dst,
e6445719
PS		 1327 htons(icmp_key->icmp_code), is_mask);
1328 attrs &= ~(1 << OVS_KEY_ATTR_ICMP);
1329 }
1330
1331 if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) {
1332 const struct ovs_key_icmpv6 *icmpv6_key;
1333
1334 icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]);
1139e241 1335 SW_FLOW_KEY_PUT(match, tp.src,
e6445719 1336 htons(icmpv6_key->icmpv6_type), is_mask);
1139e241 1337 SW_FLOW_KEY_PUT(match, tp.dst,
e6445719
PS		 1338 htons(icmpv6_key->icmpv6_code), is_mask);
1339 attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6);
1340 }
1341
1342 if (attrs & (1 << OVS_KEY_ATTR_ND)) {
1343 const struct ovs_key_nd *nd_key;
1344
1345 nd_key = nla_data(a[OVS_KEY_ATTR_ND]);
1346 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target,
1347 nd_key->nd_target,
1348 sizeof(match->key->ipv6.nd.target),
1349 is_mask);
1350 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll,
1351 nd_key->nd_sll, ETH_ALEN, is_mask);
1352 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll,
1353 nd_key->nd_tll, ETH_ALEN, is_mask);
1354 attrs &= ~(1 << OVS_KEY_ATTR_ND);
1355 }
1356
426cda5c 1357 if (attrs != 0) {
05da5898 1358 OVS_NLERR(log, "Unknown key attributes %llx",
426cda5c 1359 (unsigned long long)attrs);
e6445719 1360 return -EINVAL;
426cda5c 1361 }
e6445719
PS		 1362
1363 return 0;
1364}
1365
81bfe3c3
TG		 1366static void nlattr_set(struct nlattr *attr, u8 val,
1367 const struct ovs_len_tbl *tbl)
e6445719 1368{
f47de068
PS		 1369 struct nlattr *nla;
1370 int rem;
e6445719 1371
f47de068
PS		 1372 /* The nlattr stream should already have been validated */
1373 nla_for_each_nested(nla, attr, rem) {
982b5270
JG		 1374 if (tbl[nla_type(nla)].len == OVS_ATTR_NESTED) {
1375 if (tbl[nla_type(nla)].next)
1376 tbl = tbl[nla_type(nla)].next;
1377 nlattr_set(nla, val, tbl);
1378 } else {
f47de068 1379 memset(nla_data(nla), val, nla_len(nla));
982b5270 1380 }
9e384715
JS		 1381
1382 if (nla_type(nla) == OVS_KEY_ATTR_CT_STATE)
1383 *(u32 *)nla_data(nla) &= CT_SUPPORTED_MASK;
f47de068
PS		 1384 }
1385}
1386
1387static void mask_set_nlattr(struct nlattr *attr, u8 val)
1388{
81bfe3c3 1389 nlattr_set(attr, val, ovs_key_lens);
e6445719
PS		 1390}
1391
1392/**
1393 * ovs_nla_get_match - parses Netlink attributes into a flow key and
1394 * mask. In case the 'mask' is NULL, the flow is treated as exact match
1395 * flow. Otherwise, it is treated as a wildcarded flow, except the mask
1396 * does not include any don't care bit.
c2ac6673 1397 * @net: Used to determine per-namespace field support.
e6445719
PS		 1398 * @match: receives the extracted flow match information.
1399 * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
1400 * sequence. The fields should of the packet that triggered the creation
1401 * of this flow.
1402 * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink
1403 * attribute specifies the mask field of the wildcarded flow.
05da5898
JR		 1404 * @log: Boolean to allow kernel error logging. Normally true, but when
1405 * probing for feature compatibility this should be passed in as false to
1406 * suppress unnecessary error logging.
e6445719 1407 */
c2ac6673 1408int ovs_nla_get_match(struct net *net, struct sw_flow_match *match,
a85311bf 1409 const struct nlattr *nla_key,
05da5898
JR		 1410 const struct nlattr *nla_mask,
1411 bool log)
e6445719
PS		 1412{
1413 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
f47de068 1414 struct nlattr *newmask = NULL;
e6445719
PS		 1415 u64 key_attrs = 0;
1416 u64 mask_attrs = 0;
e6445719
PS		 1417 int err;
1418
05da5898 1419 err = parse_flow_nlattrs(nla_key, a, &key_attrs, log);
e6445719
PS		 1420 if (err)
1421 return err;
1422
018c1dda
EG		 1423 err = parse_vlan_from_nlattrs(match, &key_attrs, a, false, log);
1424 if (err)
1425 return err;
e6445719 1426
c2ac6673 1427 err = ovs_key_from_nlattrs(net, match, key_attrs, a, false, log);
e6445719
PS		 1428 if (err)
1429 return err;
1430
a85311bf
PS		 1431 if (match->mask) {
1432 if (!nla_mask) {
1433 /* Create an exact match mask. We need to set to 0xff
1434 * all the 'match->mask' fields that have been touched
1435 * in 'match->key'. We cannot simply memset
1436 * 'match->mask', because padding bytes and fields not
1437 * specified in 'match->key' should be left to 0.
1438 * Instead, we use a stream of netlink attributes,
1439 * copied from 'key' and set to 0xff.
1440 * ovs_key_from_nlattrs() will take care of filling
1441 * 'match->mask' appropriately.
1442 */
1443 newmask = kmemdup(nla_key,
1444 nla_total_size(nla_len(nla_key)),
1445 GFP_KERNEL);
1446 if (!newmask)
1447 return -ENOMEM;
f47de068 1448
a85311bf 1449 mask_set_nlattr(newmask, 0xff);
f47de068 1450
a85311bf
PS		 1451 /* The userspace does not send tunnel attributes that
1452 * are 0, but we should not wildcard them nonetheless.
1453 */
00a93bab 1454 if (match->key->tun_proto)
a85311bf
PS		 1455 SW_FLOW_KEY_MEMSET_FIELD(match, tun_key,
1456 0xff, true);
f47de068 1457
a85311bf
PS		 1458 nla_mask = newmask;
1459 }
f47de068 1460
05da5898 1461 err = parse_flow_mask_nlattrs(nla_mask, a, &mask_attrs, log);
e6445719 1462 if (err)
f47de068 1463 goto free_newmask;
e6445719 1464
a85311bf 1465 /* Always match on tci. */
018c1dda
EG		 1466 SW_FLOW_KEY_PUT(match, eth.vlan.tci, htons(0xffff), true);
1467 SW_FLOW_KEY_PUT(match, eth.cvlan.tci, htons(0xffff), true);
e6445719 1468
018c1dda
EG		 1469 err = parse_vlan_from_nlattrs(match, &mask_attrs, a, true, log);
1470 if (err)
1471 goto free_newmask;
e6445719 1472
c2ac6673
JS		 1473 err = ovs_key_from_nlattrs(net, match, mask_attrs, a, true,
1474 log);
e6445719 1475 if (err)
f47de068 1476 goto free_newmask;
e6445719
PS		 1477 }
1478
05da5898 1479 if (!match_validate(match, key_attrs, mask_attrs, log))
f47de068 1480 err = -EINVAL;
e6445719 1481
f47de068
PS		 1482free_newmask:
1483 kfree(newmask);
1484 return err;
e6445719
PS		 1485}
1486
74ed7ab9
JS		 1487static size_t get_ufid_len(const struct nlattr *attr, bool log)
1488{
1489 size_t len;
1490
1491 if (!attr)
1492 return 0;
1493
1494 len = nla_len(attr);
1495 if (len < 1 || len > MAX_UFID_LENGTH) {
1496 OVS_NLERR(log, "ufid size %u bytes exceeds the range (1, %d)",
1497 nla_len(attr), MAX_UFID_LENGTH);
1498 return 0;
1499 }
1500
1501 return len;
1502}
1503
1504/* Initializes 'flow->ufid', returning true if 'attr' contains a valid UFID,
1505 * or false otherwise.
1506 */
1507bool ovs_nla_get_ufid(struct sw_flow_id *sfid, const struct nlattr *attr,
1508 bool log)
1509{
1510 sfid->ufid_len = get_ufid_len(attr, log);
1511 if (sfid->ufid_len)
1512 memcpy(sfid->ufid, nla_data(attr), sfid->ufid_len);
1513
1514 return sfid->ufid_len;
1515}
1516
1517int ovs_nla_get_identifier(struct sw_flow_id *sfid, const struct nlattr *ufid,
1518 const struct sw_flow_key *key, bool log)
1519{
1520 struct sw_flow_key *new_key;
1521
1522 if (ovs_nla_get_ufid(sfid, ufid, log))
1523 return 0;
1524
1525 /* If UFID was not provided, use unmasked key. */
1526 new_key = kmalloc(sizeof(*new_key), GFP_KERNEL);
1527 if (!new_key)
1528 return -ENOMEM;
1529 memcpy(new_key, key, sizeof(*key));
1530 sfid->unmasked_key = new_key;
1531
1532 return 0;
1533}
1534
1535u32 ovs_nla_get_ufid_flags(const struct nlattr *attr)
1536{
1537 return attr ? nla_get_u32(attr) : 0;
1538}
1539
e6445719
PS		 1540/**
1541 * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key.
9dd7f890
JR		 1542 * @net: Network namespace.
1543 * @key: Receives extracted in_port, priority, tun_key, skb_mark and conntrack
1544 * metadata.
1545 * @a: Array of netlink attributes holding parsed %OVS_KEY_ATTR_* Netlink
1546 * attributes.
1547 * @attrs: Bit mask for the netlink attributes included in @a.
05da5898
JR		 1548 * @log: Boolean to allow kernel error logging. Normally true, but when
1549 * probing for feature compatibility this should be passed in as false to
1550 * suppress unnecessary error logging.
e6445719
PS		 1551 *
1552 * This parses a series of Netlink attributes that form a flow key, which must
1553 * take the same form accepted by flow_from_nlattrs(), but only enough of it to
1554 * get the metadata, that is, the parts of the flow key that cannot be
1555 * extracted from the packet itself.
9dd7f890
JR		 1556 *
1557 * This must be called before the packet key fields are filled in 'key'.
e6445719
PS		 1558 */
1559
9dd7f890
JR		 1560int ovs_nla_get_flow_metadata(struct net *net,
1561 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1],
1562 u64 attrs, struct sw_flow_key *key, bool log)
e6445719 1563{
83c8df26 1564 struct sw_flow_match match;
e6445719
PS		 1565
1566 memset(&match, 0, sizeof(match));
83c8df26 1567 match.key = key;
e6445719 1568
316d4d78
JR		 1569 key->ct_state = 0;
1570 key->ct_zone = 0;
1571 key->ct_orig_proto = 0;
7f8a436e 1572 memset(&key->ct, 0, sizeof(key->ct));
9dd7f890
JR		 1573 memset(&key->ipv4.ct_orig, 0, sizeof(key->ipv4.ct_orig));
1574 memset(&key->ipv6.ct_orig, 0, sizeof(key->ipv6.ct_orig));
1575
83c8df26 1576 key->phy.in_port = DP_MAX_PORTS;
e6445719 1577
c2ac6673 1578 return metadata_from_nlattrs(net, &match, &attrs, a, false, log);
e6445719
PS		 1579}
1580
018c1dda
EG		 1581static int ovs_nla_put_vlan(struct sk_buff *skb, const struct vlan_head *vh,
1582 bool is_mask)
1583{
1584 __be16 eth_type = !is_mask ? vh->tpid : htons(0xffff);
1585
1586 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) ||
1587 nla_put_be16(skb, OVS_KEY_ATTR_VLAN, vh->tci))
1588 return -EMSGSIZE;
1589 return 0;
1590}
1591
5b4237bb
JS		 1592static int __ovs_nla_put_key(const struct sw_flow_key *swkey,
1593 const struct sw_flow_key *output, bool is_mask,
1594 struct sk_buff *skb)
e6445719
PS		 1595{
1596 struct ovs_key_ethernet *eth_key;
018c1dda
EG		 1597 struct nlattr *nla;
1598 struct nlattr *encap = NULL;
1599 struct nlattr *in_encap = NULL;
e6445719 1600
971427f3
AZ		 1601 if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id))
1602 goto nla_put_failure;
1603
1604 if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash))
1605 goto nla_put_failure;
1606
e6445719
PS		 1607 if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority))
1608 goto nla_put_failure;
1609
00a93bab 1610 if ((swkey->tun_proto || is_mask)) {
d91641d9 1611 const void *opts = NULL;
f5796684
JG		 1612
1613 if (output->tun_key.tun_flags & TUNNEL_OPTIONS_PRESENT)
d91641d9 1614 opts = TUN_METADATA_OPTS(output, swkey->tun_opts_len);
f5796684 1615
6b26ba3a
JB		 1616 if (ip_tun_to_nlattr(skb, &output->tun_key, opts,
1617 swkey->tun_opts_len, swkey->tun_proto))
f5796684
JG		 1618 goto nla_put_failure;
1619 }
e6445719
PS		 1620
1621 if (swkey->phy.in_port == DP_MAX_PORTS) {
1622 if (is_mask && (output->phy.in_port == 0xffff))
1623 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff))
1624 goto nla_put_failure;
1625 } else {
1626 u16 upper_u16;
1627 upper_u16 = !is_mask ? 0 : 0xffff;
1628
1629 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT,
1630 (upper_u16 << 16) | output->phy.in_port))
1631 goto nla_put_failure;
1632 }
1633
1634 if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark))
1635 goto nla_put_failure;
1636
9dd7f890 1637 if (ovs_ct_put_key(swkey, output, skb))
7f8a436e
JS		 1638 goto nla_put_failure;
1639
0a6410fb
JB		 1640 if (ovs_key_mac_proto(swkey) == MAC_PROTO_ETHERNET) {
1641 nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key));
1642 if (!nla)
e6445719 1643 goto nla_put_failure;
018c1dda 1644
0a6410fb
JB		 1645 eth_key = nla_data(nla);
1646 ether_addr_copy(eth_key->eth_src, output->eth.src);
1647 ether_addr_copy(eth_key->eth_dst, output->eth.dst);
1648
1649 if (swkey->eth.vlan.tci || eth_type_vlan(swkey->eth.type)) {
1650 if (ovs_nla_put_vlan(skb, &output->eth.vlan, is_mask))
018c1dda 1651 goto nla_put_failure;
0a6410fb
JB		 1652 encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
1653 if (!swkey->eth.vlan.tci)
018c1dda 1654 goto unencap;
0a6410fb
JB		 1655
1656 if (swkey->eth.cvlan.tci || eth_type_vlan(swkey->eth.type)) {
1657 if (ovs_nla_put_vlan(skb, &output->eth.cvlan, is_mask))
1658 goto nla_put_failure;
1659 in_encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
1660 if (!swkey->eth.cvlan.tci)
1661 goto unencap;
1662 }
018c1dda 1663 }
e6445719 1664
0a6410fb
JB		 1665 if (swkey->eth.type == htons(ETH_P_802_2)) {
1666 /*
1667 * Ethertype 802.2 is represented in the netlink with omitted
1668 * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and
1669 * 0xffff in the mask attribute. Ethertype can also
1670 * be wildcarded.
1671 */
1672 if (is_mask && output->eth.type)
1673 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE,
1674 output->eth.type))
1675 goto nla_put_failure;
1676 goto unencap;
1677 }
e6445719
PS		 1678 }
1679
1680 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type))
1681 goto nla_put_failure;
1682
018c1dda
EG		 1683 if (eth_type_vlan(swkey->eth.type)) {
1684 /* There are 3 VLAN tags, we don't know anything about the rest
1685 * of the packet, so truncate here.
1686 */
1687 WARN_ON_ONCE(!(encap && in_encap));
1688 goto unencap;
1689 }
1690
e6445719
PS		 1691 if (swkey->eth.type == htons(ETH_P_IP)) {
1692 struct ovs_key_ipv4 *ipv4_key;
1693
1694 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key));
1695 if (!nla)
1696 goto nla_put_failure;
1697 ipv4_key = nla_data(nla);
1698 ipv4_key->ipv4_src = output->ipv4.addr.src;
1699 ipv4_key->ipv4_dst = output->ipv4.addr.dst;
1700 ipv4_key->ipv4_proto = output->ip.proto;
1701 ipv4_key->ipv4_tos = output->ip.tos;
1702 ipv4_key->ipv4_ttl = output->ip.ttl;
1703 ipv4_key->ipv4_frag = output->ip.frag;
1704 } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
1705 struct ovs_key_ipv6 *ipv6_key;
1706
1707 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key));
1708 if (!nla)
1709 goto nla_put_failure;
1710 ipv6_key = nla_data(nla);
1711 memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src,
1712 sizeof(ipv6_key->ipv6_src));
1713 memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst,
1714 sizeof(ipv6_key->ipv6_dst));
1715 ipv6_key->ipv6_label = output->ipv6.label;
1716 ipv6_key->ipv6_proto = output->ip.proto;
1717 ipv6_key->ipv6_tclass = output->ip.tos;
1718 ipv6_key->ipv6_hlimit = output->ip.ttl;
1719 ipv6_key->ipv6_frag = output->ip.frag;
1720 } else if (swkey->eth.type == htons(ETH_P_ARP) ||
1721 swkey->eth.type == htons(ETH_P_RARP)) {
1722 struct ovs_key_arp *arp_key;
1723
1724 nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key));
1725 if (!nla)
1726 goto nla_put_failure;
1727 arp_key = nla_data(nla);
1728 memset(arp_key, 0, sizeof(struct ovs_key_arp));
1729 arp_key->arp_sip = output->ipv4.addr.src;
1730 arp_key->arp_tip = output->ipv4.addr.dst;
1731 arp_key->arp_op = htons(output->ip.proto);
8c63ff09
JP		 1732 ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha);
1733 ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha);
25cd9ba0
SH		 1734 } else if (eth_p_mpls(swkey->eth.type)) {
1735 struct ovs_key_mpls *mpls_key;
1736
1737 nla = nla_reserve(skb, OVS_KEY_ATTR_MPLS, sizeof(*mpls_key));
1738 if (!nla)
1739 goto nla_put_failure;
1740 mpls_key = nla_data(nla);
1741 mpls_key->mpls_lse = output->mpls.top_lse;
e6445719
PS		 1742 }
1743
1744 if ((swkey->eth.type == htons(ETH_P_IP) ||
1745 swkey->eth.type == htons(ETH_P_IPV6)) &&
1746 swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
1747
1748 if (swkey->ip.proto == IPPROTO_TCP) {
1749 struct ovs_key_tcp *tcp_key;
1750
1751 nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key));
1752 if (!nla)
1753 goto nla_put_failure;
1754 tcp_key = nla_data(nla);
1139e241
JR		 1755 tcp_key->tcp_src = output->tp.src;
1756 tcp_key->tcp_dst = output->tp.dst;
1757 if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS,
1758 output->tp.flags))
1759 goto nla_put_failure;
e6445719
PS		 1760 } else if (swkey->ip.proto == IPPROTO_UDP) {
1761 struct ovs_key_udp *udp_key;
1762
1763 nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key));
1764 if (!nla)
1765 goto nla_put_failure;
1766 udp_key = nla_data(nla);
1139e241
JR		 1767 udp_key->udp_src = output->tp.src;
1768 udp_key->udp_dst = output->tp.dst;
e6445719
PS		 1769 } else if (swkey->ip.proto == IPPROTO_SCTP) {
1770 struct ovs_key_sctp *sctp_key;
1771
1772 nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key));
1773 if (!nla)
1774 goto nla_put_failure;
1775 sctp_key = nla_data(nla);
1139e241
JR		 1776 sctp_key->sctp_src = output->tp.src;
1777 sctp_key->sctp_dst = output->tp.dst;
e6445719
PS		 1778 } else if (swkey->eth.type == htons(ETH_P_IP) &&
1779 swkey->ip.proto == IPPROTO_ICMP) {
1780 struct ovs_key_icmp *icmp_key;
1781
1782 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key));
1783 if (!nla)
1784 goto nla_put_failure;
1785 icmp_key = nla_data(nla);
1139e241
JR		 1786 icmp_key->icmp_type = ntohs(output->tp.src);
1787 icmp_key->icmp_code = ntohs(output->tp.dst);
e6445719
PS		 1788 } else if (swkey->eth.type == htons(ETH_P_IPV6) &&
1789 swkey->ip.proto == IPPROTO_ICMPV6) {
1790 struct ovs_key_icmpv6 *icmpv6_key;
1791
1792 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6,
1793 sizeof(*icmpv6_key));
1794 if (!nla)
1795 goto nla_put_failure;
1796 icmpv6_key = nla_data(nla);
1139e241
JR		 1797 icmpv6_key->icmpv6_type = ntohs(output->tp.src);
1798 icmpv6_key->icmpv6_code = ntohs(output->tp.dst);
e6445719
PS		 1799
1800 if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION ||
1801 icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) {
1802 struct ovs_key_nd *nd_key;
1803
1804 nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key));
1805 if (!nla)
1806 goto nla_put_failure;
1807 nd_key = nla_data(nla);
1808 memcpy(nd_key->nd_target, &output->ipv6.nd.target,
1809 sizeof(nd_key->nd_target));
8c63ff09
JP		 1810 ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll);
1811 ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll);
e6445719
PS		 1812 }
1813 }
1814 }
1815
1816unencap:
018c1dda
EG		 1817 if (in_encap)
1818 nla_nest_end(skb, in_encap);
e6445719
PS		 1819 if (encap)
1820 nla_nest_end(skb, encap);
1821
1822 return 0;
1823
1824nla_put_failure:
1825 return -EMSGSIZE;
1826}
1827
5b4237bb
JS		 1828int ovs_nla_put_key(const struct sw_flow_key *swkey,
1829 const struct sw_flow_key *output, int attr, bool is_mask,
1830 struct sk_buff *skb)
1831{
1832 int err;
1833 struct nlattr *nla;
1834
1835 nla = nla_nest_start(skb, attr);
1836 if (!nla)
1837 return -EMSGSIZE;
1838 err = __ovs_nla_put_key(swkey, output, is_mask, skb);
1839 if (err)
1840 return err;
1841 nla_nest_end(skb, nla);
1842
1843 return 0;
1844}
1845
1846/* Called with ovs_mutex or RCU read lock. */
74ed7ab9
JS		 1847int ovs_nla_put_identifier(const struct sw_flow *flow, struct sk_buff *skb)
1848{
1849 if (ovs_identifier_is_ufid(&flow->id))
1850 return nla_put(skb, OVS_FLOW_ATTR_UFID, flow->id.ufid_len,
1851 flow->id.ufid);
1852
1853 return ovs_nla_put_key(flow->id.unmasked_key, flow->id.unmasked_key,
1854 OVS_FLOW_ATTR_KEY, false, skb);
1855}
1856
1857/* Called with ovs_mutex or RCU read lock. */
1858int ovs_nla_put_masked_key(const struct sw_flow *flow, struct sk_buff *skb)
5b4237bb 1859{
26ad0b83 1860 return ovs_nla_put_key(&flow->key, &flow->key,
5b4237bb
JS		 1861 OVS_FLOW_ATTR_KEY, false, skb);
1862}
1863
1864/* Called with ovs_mutex or RCU read lock. */
1865int ovs_nla_put_mask(const struct sw_flow *flow, struct sk_buff *skb)
1866{
1867 return ovs_nla_put_key(&flow->key, &flow->mask->key,
1868 OVS_FLOW_ATTR_MASK, true, skb);
1869}
1870
e6445719
PS		 1871#define MAX_ACTIONS_BUFSIZE (32 * 1024)
1872
05da5898 1873static struct sw_flow_actions *nla_alloc_flow_actions(int size, bool log)
e6445719
PS		 1874{
1875 struct sw_flow_actions *sfa;
1876
426cda5c 1877 if (size > MAX_ACTIONS_BUFSIZE) {
05da5898 1878 OVS_NLERR(log, "Flow action size %u bytes exceeds max", size);
e6445719 1879 return ERR_PTR(-EINVAL);
426cda5c 1880 }
e6445719
PS		 1881
1882 sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL);
1883 if (!sfa)
1884 return ERR_PTR(-ENOMEM);
1885
1886 sfa->actions_len = 0;
1887 return sfa;
1888}
1889
34ae932a
TG		 1890static void ovs_nla_free_set_action(const struct nlattr *a)
1891{
1892 const struct nlattr *ovs_key = nla_data(a);
1893 struct ovs_tunnel_info *ovs_tun;
1894
1895 switch (nla_type(ovs_key)) {
1896 case OVS_KEY_ATTR_TUNNEL_INFO:
1897 ovs_tun = nla_data(ovs_key);
1898 dst_release((struct dst_entry *)ovs_tun->tun_dst);
1899 break;
1900 }
1901}
1902
1903void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts)
1904{
1905 const struct nlattr *a;
1906 int rem;
1907
1908 if (!sf_acts)
1909 return;
1910
1911 nla_for_each_attr(a, sf_acts->actions, sf_acts->actions_len, rem) {
1912 switch (nla_type(a)) {
1913 case OVS_ACTION_ATTR_SET:
1914 ovs_nla_free_set_action(a);
1915 break;
7f8a436e
JS		 1916 case OVS_ACTION_ATTR_CT:
1917 ovs_ct_free_action(a);
1918 break;
34ae932a
TG		 1919 }
1920 }
1921
1922 kfree(sf_acts);
1923}
1924
1925static void __ovs_nla_free_flow_actions(struct rcu_head *head)
1926{
1927 ovs_nla_free_flow_actions(container_of(head, struct sw_flow_actions, rcu));
1928}
1929
e6445719
PS		 1930/* Schedules 'sf_acts' to be freed after the next RCU grace period.
1931 * The caller must hold rcu_read_lock for this to be sensible. */
34ae932a 1932void ovs_nla_free_flow_actions_rcu(struct sw_flow_actions *sf_acts)
e6445719 1933{
34ae932a 1934 call_rcu(&sf_acts->rcu, __ovs_nla_free_flow_actions);
e6445719
PS		 1935}
1936
1937static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa,
05da5898 1938 int attr_len, bool log)
e6445719
PS		 1939{
1940
1941 struct sw_flow_actions *acts;
1942 int new_acts_size;
1943 int req_size = NLA_ALIGN(attr_len);
1944 int next_offset = offsetof(struct sw_flow_actions, actions) +
1945 (*sfa)->actions_len;
1946
1947 if (req_size <= (ksize(*sfa) - next_offset))
1948 goto out;
1949
1950 new_acts_size = ksize(*sfa) * 2;
1951
1952 if (new_acts_size > MAX_ACTIONS_BUFSIZE) {
1953 if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size)
1954 return ERR_PTR(-EMSGSIZE);
1955 new_acts_size = MAX_ACTIONS_BUFSIZE;
1956 }
1957
05da5898 1958 acts = nla_alloc_flow_actions(new_acts_size, log);
e6445719
PS		 1959 if (IS_ERR(acts))
1960 return (void *)acts;
1961
1962 memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len);
1963 acts->actions_len = (*sfa)->actions_len;
8e2fed1c 1964 acts->orig_len = (*sfa)->orig_len;
e6445719
PS		 1965 kfree(*sfa);
1966 *sfa = acts;
1967
1968out:
1969 (*sfa)->actions_len += req_size;
1970 return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset);
1971}
1972
f0b128c1 1973static struct nlattr *__add_action(struct sw_flow_actions **sfa,
05da5898 1974 int attrtype, void *data, int len, bool log)
e6445719
PS		 1975{
1976 struct nlattr *a;
1977
05da5898 1978 a = reserve_sfa_size(sfa, nla_attr_size(len), log);
e6445719 1979 if (IS_ERR(a))
f0b128c1 1980 return a;
e6445719
PS		 1981
1982 a->nla_type = attrtype;
1983 a->nla_len = nla_attr_size(len);
1984
1985 if (data)
1986 memcpy(nla_data(a), data, len);
1987 memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len));
1988
f0b128c1
JG		 1989 return a;
1990}
1991
7f8a436e
JS		 1992int ovs_nla_add_action(struct sw_flow_actions **sfa, int attrtype, void *data,
1993 int len, bool log)
f0b128c1
JG		 1994{
1995 struct nlattr *a;
1996
05da5898 1997 a = __add_action(sfa, attrtype, data, len, log);
f0b128c1 1998
f35423c1 1999 return PTR_ERR_OR_ZERO(a);
e6445719
PS		 2000}
2001
2002static inline int add_nested_action_start(struct sw_flow_actions **sfa,
05da5898 2003 int attrtype, bool log)
e6445719
PS		 2004{
2005 int used = (*sfa)->actions_len;
2006 int err;
2007
7f8a436e 2008 err = ovs_nla_add_action(sfa, attrtype, NULL, 0, log);
e6445719
PS		 2009 if (err)
2010 return err;
2011
2012 return used;
2013}
2014
2015static inline void add_nested_action_end(struct sw_flow_actions *sfa,
2016 int st_offset)
2017{
2018 struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions +
2019 st_offset);
2020
2021 a->nla_len = sfa->actions_len - st_offset;
2022}
2023
7f8a436e 2024static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
25cd9ba0
SH		 2025 const struct sw_flow_key *key,
2026 int depth, struct sw_flow_actions **sfa,
05da5898 2027 __be16 eth_type, __be16 vlan_tci, bool log);
25cd9ba0 2028
7f8a436e 2029static int validate_and_copy_sample(struct net *net, const struct nlattr *attr,
e6445719 2030 const struct sw_flow_key *key, int depth,
25cd9ba0 2031 struct sw_flow_actions **sfa,
05da5898 2032 __be16 eth_type, __be16 vlan_tci, bool log)
e6445719
PS		 2033{
2034 const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];
2035 const struct nlattr *probability, *actions;
2036 const struct nlattr *a;
2037 int rem, start, err, st_acts;
2038
2039 memset(attrs, 0, sizeof(attrs));
2040 nla_for_each_nested(a, attr, rem) {
2041 int type = nla_type(a);
2042 if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type])
2043 return -EINVAL;
2044 attrs[type] = a;
2045 }
2046 if (rem)
2047 return -EINVAL;
2048
2049 probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY];
2050 if (!probability || nla_len(probability) != sizeof(u32))
2051 return -EINVAL;
2052
2053 actions = attrs[OVS_SAMPLE_ATTR_ACTIONS];
2054 if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN))
2055 return -EINVAL;
2056
2057 /* validation done, copy sample action. */
05da5898 2058 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE, log);
e6445719
PS		 2059 if (start < 0)
2060 return start;
7f8a436e
JS		 2061 err = ovs_nla_add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY,
2062 nla_data(probability), sizeof(u32), log);
e6445719
PS		 2063 if (err)
2064 return err;
05da5898 2065 st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS, log);
e6445719
PS		 2066 if (st_acts < 0)
2067 return st_acts;
2068
7f8a436e 2069 err = __ovs_nla_copy_actions(net, actions, key, depth + 1, sfa,
05da5898 2070 eth_type, vlan_tci, log);
e6445719
PS		 2071 if (err)
2072 return err;
2073
2074 add_nested_action_end(*sfa, st_acts);
2075 add_nested_action_end(*sfa, start);
2076
2077 return 0;
2078}
2079
e6445719
PS		 2080void ovs_match_init(struct sw_flow_match *match,
2081 struct sw_flow_key *key,
2279994d 2082 bool reset_key,
e6445719
PS		 2083 struct sw_flow_mask *mask)
2084{
2085 memset(match, 0, sizeof(*match));
2086 match->key = key;
2087 match->mask = mask;
2088
2279994d 2089 if (reset_key)
2090 memset(key, 0, sizeof(*key));
e6445719
PS		 2091
2092 if (mask) {
2093 memset(&mask->key, 0, sizeof(mask->key));
2094 mask->range.start = mask->range.end = 0;
2095 }
2096}
2097
d91641d9
TG		 2098static int validate_geneve_opts(struct sw_flow_key *key)
2099{
2100 struct geneve_opt *option;
2101 int opts_len = key->tun_opts_len;
2102 bool crit_opt = false;
2103
2104 option = (struct geneve_opt *)TUN_METADATA_OPTS(key, key->tun_opts_len);
2105 while (opts_len > 0) {
2106 int len;
2107
2108 if (opts_len < sizeof(*option))
2109 return -EINVAL;
2110
2111 len = sizeof(*option) + option->length * 4;
2112 if (len > opts_len)
2113 return -EINVAL;
2114
2115 crit_opt |= !!(option->type & GENEVE_CRIT_OPT_TYPE);
2116
2117 option = (struct geneve_opt *)((u8 *)option + len);
2118 opts_len -= len;
2119 };
2120
2121 key->tun_key.tun_flags |= crit_opt ? TUNNEL_CRIT_OPT : 0;
2122
2123 return 0;
2124}
2125
e6445719 2126static int validate_and_copy_set_tun(const struct nlattr *attr,
05da5898 2127 struct sw_flow_actions **sfa, bool log)
e6445719
PS		 2128{
2129 struct sw_flow_match match;
2130 struct sw_flow_key key;
34ae932a 2131 struct metadata_dst *tun_dst;
1d8fff90 2132 struct ip_tunnel_info *tun_info;
34ae932a 2133 struct ovs_tunnel_info *ovs_tun;
f0b128c1 2134 struct nlattr *a;
13101602 2135 int err = 0, start, opts_type;
e6445719 2136
2279994d 2137 ovs_match_init(&match, &key, true, NULL);
6b26ba3a 2138 opts_type = ip_tun_from_nlattr(nla_data(attr), &match, false, log);
1dd144cf
TG		 2139 if (opts_type < 0)
2140 return opts_type;
e6445719 2141
f5796684 2142 if (key.tun_opts_len) {
1dd144cf
TG		 2143 switch (opts_type) {
2144 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
2145 err = validate_geneve_opts(&key);
2146 if (err < 0)
2147 return err;
2148 break;
2149 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
2150 break;
2151 }
f5796684
JG		 2152 };
2153
05da5898 2154 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET, log);
e6445719
PS		 2155 if (start < 0)
2156 return start;
2157
34ae932a
TG		 2158 tun_dst = metadata_dst_alloc(key.tun_opts_len, GFP_KERNEL);
2159 if (!tun_dst)
2160 return -ENOMEM;
2161
d71785ff
PA		 2162 err = dst_cache_init(&tun_dst->u.tun_info.dst_cache, GFP_KERNEL);
2163 if (err) {
2164 dst_release((struct dst_entry *)tun_dst);
2165 return err;
2166 }
2167
f0b128c1 2168 a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL,
34ae932a
TG		 2169 sizeof(*ovs_tun), log);
2170 if (IS_ERR(a)) {
2171 dst_release((struct dst_entry *)tun_dst);
f0b128c1 2172 return PTR_ERR(a);
34ae932a
TG		 2173 }
2174
2175 ovs_tun = nla_data(a);
2176 ovs_tun->tun_dst = tun_dst;
f0b128c1 2177
34ae932a
TG		 2178 tun_info = &tun_dst->u.tun_info;
2179 tun_info->mode = IP_TUNNEL_INFO_TX;
00a93bab
JB		 2180 if (key.tun_proto == AF_INET6)
2181 tun_info->mode |= IP_TUNNEL_INFO_IPV6;
1d8fff90 2182 tun_info->key = key.tun_key;
f0b128c1 2183
4c222798
PS		 2184 /* We need to store the options in the action itself since
2185 * everything else will go away after flow setup. We can append
2186 * it to tun_info and then point there.
2187 */
2188 ip_tunnel_info_opts_set(tun_info,
2189 TUN_METADATA_OPTS(&key, key.tun_opts_len),
2190 key.tun_opts_len);
e6445719
PS		 2191 add_nested_action_end(*sfa, start);
2192
2193 return err;
2194}
2195
83d2b9ba
JR		 2196/* Return false if there are any non-masked bits set.
2197 * Mask follows data immediately, before any netlink padding.
2198 */
2199static bool validate_masked(u8 *data, int len)
2200{
2201 u8 *mask = data + len;
2202
2203 while (len--)
2204 if (*data++ & ~*mask++)
2205 return false;
2206
2207 return true;
2208}
2209
e6445719
PS		 2210static int validate_set(const struct nlattr *a,
2211 const struct sw_flow_key *flow_key,
0a6410fb
JB		 2212 struct sw_flow_actions **sfa, bool *skip_copy,
2213 u8 mac_proto, __be16 eth_type, bool masked, bool log)
e6445719
PS		 2214{
2215 const struct nlattr *ovs_key = nla_data(a);
2216 int key_type = nla_type(ovs_key);
83d2b9ba 2217 size_t key_len;
e6445719
PS		 2218
2219 /* There can be only one key in a action */
2220 if (nla_total_size(nla_len(ovs_key)) != nla_len(a))
2221 return -EINVAL;
2222
83d2b9ba
JR		 2223 key_len = nla_len(ovs_key);
2224 if (masked)
2225 key_len /= 2;
2226
e6445719 2227 if (key_type > OVS_KEY_ATTR_MAX ||
982b5270 2228 !check_attr_len(key_len, ovs_key_lens[key_type].len))
e6445719
PS		 2229 return -EINVAL;
2230
83d2b9ba
JR		 2231 if (masked && !validate_masked(nla_data(ovs_key), key_len))
2232 return -EINVAL;
2233
e6445719
PS		 2234 switch (key_type) {
2235 const struct ovs_key_ipv4 *ipv4_key;
2236 const struct ovs_key_ipv6 *ipv6_key;
2237 int err;
2238
2239 case OVS_KEY_ATTR_PRIORITY:
2240 case OVS_KEY_ATTR_SKB_MARK:
182e3042 2241 case OVS_KEY_ATTR_CT_MARK:
33db4125 2242 case OVS_KEY_ATTR_CT_LABELS:
e6445719
PS		 2243 break;
2244
0a6410fb
JB		 2245 case OVS_KEY_ATTR_ETHERNET:
2246 if (mac_proto != MAC_PROTO_ETHERNET)
2247 return -EINVAL;
87e159c5 2248 break;
0a6410fb 2249
e6445719 2250 case OVS_KEY_ATTR_TUNNEL:
83d2b9ba
JR		 2251 if (masked)
2252 return -EINVAL; /* Masked tunnel set not supported. */
2253
2254 *skip_copy = true;
05da5898 2255 err = validate_and_copy_set_tun(a, sfa, log);
e6445719
PS		 2256 if (err)
2257 return err;
2258 break;
2259
2260 case OVS_KEY_ATTR_IPV4:
25cd9ba0 2261 if (eth_type != htons(ETH_P_IP))
e6445719
PS		 2262 return -EINVAL;
2263
e6445719 2264 ipv4_key = nla_data(ovs_key);
e6445719 2265
83d2b9ba
JR		 2266 if (masked) {
2267 const struct ovs_key_ipv4 *mask = ipv4_key + 1;
e6445719 2268
83d2b9ba
JR		 2269 /* Non-writeable fields. */
2270 if (mask->ipv4_proto || mask->ipv4_frag)
2271 return -EINVAL;
2272 } else {
2273 if (ipv4_key->ipv4_proto != flow_key->ip.proto)
2274 return -EINVAL;
2275
2276 if (ipv4_key->ipv4_frag != flow_key->ip.frag)
2277 return -EINVAL;
2278 }
e6445719
PS		 2279 break;
2280
2281 case OVS_KEY_ATTR_IPV6:
25cd9ba0 2282 if (eth_type != htons(ETH_P_IPV6))
e6445719
PS		 2283 return -EINVAL;
2284
e6445719 2285 ipv6_key = nla_data(ovs_key);
e6445719 2286
83d2b9ba
JR		 2287 if (masked) {
2288 const struct ovs_key_ipv6 *mask = ipv6_key + 1;
2289
2290 /* Non-writeable fields. */
2291 if (mask->ipv6_proto || mask->ipv6_frag)
2292 return -EINVAL;
2293
2294 /* Invalid bits in the flow label mask? */
2295 if (ntohl(mask->ipv6_label) & 0xFFF00000)
2296 return -EINVAL;
2297 } else {
2298 if (ipv6_key->ipv6_proto != flow_key->ip.proto)
2299 return -EINVAL;
e6445719 2300
83d2b9ba
JR		 2301 if (ipv6_key->ipv6_frag != flow_key->ip.frag)
2302 return -EINVAL;
2303 }
e6445719
PS		 2304 if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000)
2305 return -EINVAL;
2306
2307 break;
2308
2309 case OVS_KEY_ATTR_TCP:
83d2b9ba
JR		 2310 if ((eth_type != htons(ETH_P_IP) &&
2311 eth_type != htons(ETH_P_IPV6)) ||
2312 flow_key->ip.proto != IPPROTO_TCP)
e6445719
PS		 2313 return -EINVAL;
2314
83d2b9ba 2315 break;
e6445719
PS		 2316
2317 case OVS_KEY_ATTR_UDP:
83d2b9ba
JR		 2318 if ((eth_type != htons(ETH_P_IP) &&
2319 eth_type != htons(ETH_P_IPV6)) ||
2320 flow_key->ip.proto != IPPROTO_UDP)
e6445719
PS		 2321 return -EINVAL;
2322
83d2b9ba 2323 break;
25cd9ba0
SH		 2324
2325 case OVS_KEY_ATTR_MPLS:
2326 if (!eth_p_mpls(eth_type))
2327 return -EINVAL;
2328 break;
e6445719
PS		 2329
2330 case OVS_KEY_ATTR_SCTP:
83d2b9ba
JR		 2331 if ((eth_type != htons(ETH_P_IP) &&
2332 eth_type != htons(ETH_P_IPV6)) ||
2333 flow_key->ip.proto != IPPROTO_SCTP)
e6445719
PS		 2334 return -EINVAL;
2335
83d2b9ba 2336 break;
e6445719
PS		 2337
2338 default:
2339 return -EINVAL;
2340 }
2341
83d2b9ba
JR		 2342 /* Convert non-masked non-tunnel set actions to masked set actions. */
2343 if (!masked && key_type != OVS_KEY_ATTR_TUNNEL) {
2344 int start, len = key_len * 2;
2345 struct nlattr *at;
2346
2347 *skip_copy = true;
2348
2349 start = add_nested_action_start(sfa,
2350 OVS_ACTION_ATTR_SET_TO_MASKED,
2351 log);
2352 if (start < 0)
2353 return start;
2354
2355 at = __add_action(sfa, key_type, NULL, len, log);
2356 if (IS_ERR(at))
2357 return PTR_ERR(at);
2358
2359 memcpy(nla_data(at), nla_data(ovs_key), key_len); /* Key. */
2360 memset(nla_data(at) + key_len, 0xff, key_len); /* Mask. */
2361 /* Clear non-writeable bits from otherwise writeable fields. */
2362 if (key_type == OVS_KEY_ATTR_IPV6) {
2363 struct ovs_key_ipv6 *mask = nla_data(at) + key_len;
2364
2365 mask->ipv6_label &= htonl(0x000FFFFF);
2366 }
2367 add_nested_action_end(*sfa, start);
2368 }
2369
e6445719
PS		 2370 return 0;
2371}
2372
2373static int validate_userspace(const struct nlattr *attr)
2374{
2375 static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = {
2376 [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 },
2377 [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC },
8f0aad6f 2378 [OVS_USERSPACE_ATTR_EGRESS_TUN_PORT] = {.type = NLA_U32 },
e6445719
PS		 2379 };
2380 struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];
2381 int error;
2382
2383 error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX,
2384 attr, userspace_policy);
2385 if (error)
2386 return error;
2387
2388 if (!a[OVS_USERSPACE_ATTR_PID] ||
2389 !nla_get_u32(a[OVS_USERSPACE_ATTR_PID]))
2390 return -EINVAL;
2391
2392 return 0;
2393}
2394
2395static int copy_action(const struct nlattr *from,
05da5898 2396 struct sw_flow_actions **sfa, bool log)
e6445719
PS		 2397{
2398 int totlen = NLA_ALIGN(from->nla_len);
2399 struct nlattr *to;
2400
05da5898 2401 to = reserve_sfa_size(sfa, from->nla_len, log);
e6445719
PS		 2402 if (IS_ERR(to))
2403 return PTR_ERR(to);
2404
2405 memcpy(to, from, totlen);
2406 return 0;
2407}
2408
7f8a436e 2409static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
25cd9ba0
SH		 2410 const struct sw_flow_key *key,
2411 int depth, struct sw_flow_actions **sfa,
05da5898 2412 __be16 eth_type, __be16 vlan_tci, bool log)
e6445719 2413{
0a6410fb 2414 u8 mac_proto = ovs_key_mac_proto(key);
e6445719
PS		 2415 const struct nlattr *a;
2416 int rem, err;
2417
2418 if (depth >= SAMPLE_ACTION_DEPTH)
2419 return -EOVERFLOW;
2420
2421 nla_for_each_nested(a, attr, rem) {
2422 /* Expected argument lengths, (u32)-1 for variable length. */
2423 static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {
2424 [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32),
971427f3 2425 [OVS_ACTION_ATTR_RECIRC] = sizeof(u32),
e6445719 2426 [OVS_ACTION_ATTR_USERSPACE] = (u32)-1,
25cd9ba0
SH		 2427 [OVS_ACTION_ATTR_PUSH_MPLS] = sizeof(struct ovs_action_push_mpls),
2428 [OVS_ACTION_ATTR_POP_MPLS] = sizeof(__be16),
e6445719
PS		 2429 [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan),
2430 [OVS_ACTION_ATTR_POP_VLAN] = 0,
2431 [OVS_ACTION_ATTR_SET] = (u32)-1,
83d2b9ba 2432 [OVS_ACTION_ATTR_SET_MASKED] = (u32)-1,
971427f3 2433 [OVS_ACTION_ATTR_SAMPLE] = (u32)-1,
7f8a436e
JS		 2434 [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash),
2435 [OVS_ACTION_ATTR_CT] = (u32)-1,
f2a4d086 2436 [OVS_ACTION_ATTR_TRUNC] = sizeof(struct ovs_action_trunc),
91820da6
JB		 2437 [OVS_ACTION_ATTR_PUSH_ETH] = sizeof(struct ovs_action_push_eth),
2438 [OVS_ACTION_ATTR_POP_ETH] = 0,
e6445719
PS		 2439 };
2440 const struct ovs_action_push_vlan *vlan;
2441 int type = nla_type(a);
2442 bool skip_copy;
2443
2444 if (type > OVS_ACTION_ATTR_MAX ||
2445 (action_lens[type] != nla_len(a) &&
2446 action_lens[type] != (u32)-1))
2447 return -EINVAL;
2448
2449 skip_copy = false;
2450 switch (type) {
2451 case OVS_ACTION_ATTR_UNSPEC:
2452 return -EINVAL;
2453
2454 case OVS_ACTION_ATTR_USERSPACE:
2455 err = validate_userspace(a);
2456 if (err)
2457 return err;
2458 break;
2459
2460 case OVS_ACTION_ATTR_OUTPUT:
2461 if (nla_get_u32(a) >= DP_MAX_PORTS)
2462 return -EINVAL;
2463 break;
2464
f2a4d086
WT		 2465 case OVS_ACTION_ATTR_TRUNC: {
2466 const struct ovs_action_trunc *trunc = nla_data(a);
2467
2468 if (trunc->max_len < ETH_HLEN)
2469 return -EINVAL;
2470 break;
2471 }
2472
971427f3
AZ		 2473 case OVS_ACTION_ATTR_HASH: {
2474 const struct ovs_action_hash *act_hash = nla_data(a);
2475
2476 switch (act_hash->hash_alg) {
2477 case OVS_HASH_ALG_L4:
2478 break;
2479 default:
2480 return -EINVAL;
2481 }
2482
2483 break;
2484 }
e6445719
PS		 2485
2486 case OVS_ACTION_ATTR_POP_VLAN:
0a6410fb
JB		 2487 if (mac_proto != MAC_PROTO_ETHERNET)
2488 return -EINVAL;
25cd9ba0 2489 vlan_tci = htons(0);
e6445719
PS		 2490 break;
2491
2492 case OVS_ACTION_ATTR_PUSH_VLAN:
0a6410fb
JB		 2493 if (mac_proto != MAC_PROTO_ETHERNET)
2494 return -EINVAL;
e6445719 2495 vlan = nla_data(a);
018c1dda 2496 if (!eth_type_vlan(vlan->vlan_tpid))
e6445719
PS		 2497 return -EINVAL;
2498 if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT)))
2499 return -EINVAL;
25cd9ba0 2500 vlan_tci = vlan->vlan_tci;
e6445719
PS		 2501 break;
2502
971427f3
AZ		 2503 case OVS_ACTION_ATTR_RECIRC:
2504 break;
2505
25cd9ba0
SH		 2506 case OVS_ACTION_ATTR_PUSH_MPLS: {
2507 const struct ovs_action_push_mpls *mpls = nla_data(a);
2508
25cd9ba0
SH		 2509 if (!eth_p_mpls(mpls->mpls_ethertype))
2510 return -EINVAL;
2511 /* Prohibit push MPLS other than to a white list
2512 * for packets that have a known tag order.
2513 */
2514 if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
2515 (eth_type != htons(ETH_P_IP) &&
2516 eth_type != htons(ETH_P_IPV6) &&
2517 eth_type != htons(ETH_P_ARP) &&
2518 eth_type != htons(ETH_P_RARP) &&
2519 !eth_p_mpls(eth_type)))
2520 return -EINVAL;
2521 eth_type = mpls->mpls_ethertype;
2522 break;
2523 }
2524
2525 case OVS_ACTION_ATTR_POP_MPLS:
2526 if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
2527 !eth_p_mpls(eth_type))
2528 return -EINVAL;
2529
2530 /* Disallow subsequent L2.5+ set and mpls_pop actions
2531 * as there is no check here to ensure that the new
2532 * eth_type is valid and thus set actions could
2533 * write off the end of the packet or otherwise
2534 * corrupt it.
2535 *
2536 * Support for these actions is planned using packet
2537 * recirculation.
2538 */
2539 eth_type = htons(0);
2540 break;
2541
e6445719 2542 case OVS_ACTION_ATTR_SET:
25cd9ba0 2543 err = validate_set(a, key, sfa,
0a6410fb
JB		 2544 &skip_copy, mac_proto, eth_type,
2545 false, log);
83d2b9ba
JR		 2546 if (err)
2547 return err;
2548 break;
2549
2550 case OVS_ACTION_ATTR_SET_MASKED:
2551 err = validate_set(a, key, sfa,
0a6410fb
JB		 2552 &skip_copy, mac_proto, eth_type,
2553 true, log);
e6445719
PS		 2554 if (err)
2555 return err;
2556 break;
2557
2558 case OVS_ACTION_ATTR_SAMPLE:
7f8a436e 2559 err = validate_and_copy_sample(net, a, key, depth, sfa,
05da5898 2560 eth_type, vlan_tci, log);
e6445719
PS		 2561 if (err)
2562 return err;
2563 skip_copy = true;
2564 break;
2565
7f8a436e
JS		 2566 case OVS_ACTION_ATTR_CT:
2567 err = ovs_ct_copy_action(net, a, key, sfa, log);
2568 if (err)
2569 return err;
2570 skip_copy = true;
2571 break;
2572
91820da6
JB		 2573 case OVS_ACTION_ATTR_PUSH_ETH:
2574 /* Disallow pushing an Ethernet header if one
2575 * is already present */
2576 if (mac_proto != MAC_PROTO_NONE)
2577 return -EINVAL;
2578 mac_proto = MAC_PROTO_NONE;
2579 break;
2580
2581 case OVS_ACTION_ATTR_POP_ETH:
2582 if (mac_proto != MAC_PROTO_ETHERNET)
2583 return -EINVAL;
2584 if (vlan_tci & htons(VLAN_TAG_PRESENT))
2585 return -EINVAL;
2586 mac_proto = MAC_PROTO_ETHERNET;
2587 break;
2588
e6445719 2589 default:
05da5898 2590 OVS_NLERR(log, "Unknown Action type %d", type);
e6445719
PS		 2591 return -EINVAL;
2592 }
2593 if (!skip_copy) {
05da5898 2594 err = copy_action(a, sfa, log);
e6445719
PS		 2595 if (err)
2596 return err;
2597 }
2598 }
2599
2600 if (rem > 0)
2601 return -EINVAL;
2602
2603 return 0;
2604}
2605
83d2b9ba 2606/* 'key' must be the masked key. */
7f8a436e 2607int ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
25cd9ba0 2608 const struct sw_flow_key *key,
05da5898 2609 struct sw_flow_actions **sfa, bool log)
25cd9ba0 2610{
2fdb957d
PS		 2611 int err;
2612
05da5898 2613 *sfa = nla_alloc_flow_actions(nla_len(attr), log);
2fdb957d
PS		 2614 if (IS_ERR(*sfa))
2615 return PTR_ERR(*sfa);
2616
8e2fed1c 2617 (*sfa)->orig_len = nla_len(attr);
7f8a436e 2618 err = __ovs_nla_copy_actions(net, attr, key, 0, sfa, key->eth.type,
018c1dda 2619 key->eth.vlan.tci, log);
2fdb957d 2620 if (err)
34ae932a 2621 ovs_nla_free_flow_actions(*sfa);
2fdb957d
PS		 2622
2623 return err;
25cd9ba0
SH		 2624}
2625
e6445719
PS		 2626static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb)
2627{
2628 const struct nlattr *a;
2629 struct nlattr *start;
2630 int err = 0, rem;
2631
2632 start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE);
2633 if (!start)
2634 return -EMSGSIZE;
2635
2636 nla_for_each_nested(a, attr, rem) {
2637 int type = nla_type(a);
2638 struct nlattr *st_sample;
2639
2640 switch (type) {
2641 case OVS_SAMPLE_ATTR_PROBABILITY:
2642 if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY,
2643 sizeof(u32), nla_data(a)))
2644 return -EMSGSIZE;
2645 break;
2646 case OVS_SAMPLE_ATTR_ACTIONS:
2647 st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS);
2648 if (!st_sample)
2649 return -EMSGSIZE;
2650 err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb);
2651 if (err)
2652 return err;
2653 nla_nest_end(skb, st_sample);
2654 break;
2655 }
2656 }
2657
2658 nla_nest_end(skb, start);
2659 return err;
2660}
2661
2662static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb)
2663{
2664 const struct nlattr *ovs_key = nla_data(a);
2665 int key_type = nla_type(ovs_key);
2666 struct nlattr *start;
2667 int err;
2668
2669 switch (key_type) {
f0b128c1 2670 case OVS_KEY_ATTR_TUNNEL_INFO: {
34ae932a
TG		 2671 struct ovs_tunnel_info *ovs_tun = nla_data(ovs_key);
2672 struct ip_tunnel_info *tun_info = &ovs_tun->tun_dst->u.tun_info;
f0b128c1 2673
e6445719
PS		 2674 start = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
2675 if (!start)
2676 return -EMSGSIZE;
2677
e905eabc
SH		 2678 err = ip_tun_to_nlattr(skb, &tun_info->key,
2679 ip_tunnel_info_opts(tun_info),
2680 tun_info->options_len,
2681 ip_tunnel_info_af(tun_info));
e6445719
PS		 2682 if (err)
2683 return err;
2684 nla_nest_end(skb, start);
2685 break;
f0b128c1 2686 }
e6445719
PS		 2687 default:
2688 if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key))
2689 return -EMSGSIZE;
2690 break;
2691 }
2692
2693 return 0;
2694}
2695
83d2b9ba
JR		 2696static int masked_set_action_to_set_action_attr(const struct nlattr *a,
2697 struct sk_buff *skb)
2698{
2699 const struct nlattr *ovs_key = nla_data(a);
f4f8e738 2700 struct nlattr *nla;
83d2b9ba
JR		 2701 size_t key_len = nla_len(ovs_key) / 2;
2702
2703 /* Revert the conversion we did from a non-masked set action to
2704 * masked set action.
2705 */
f4f8e738
JS		 2706 nla = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
2707 if (!nla)
83d2b9ba
JR		 2708 return -EMSGSIZE;
2709
f4f8e738
JS		 2710 if (nla_put(skb, nla_type(ovs_key), key_len, nla_data(ovs_key)))
2711 return -EMSGSIZE;
2712
2713 nla_nest_end(skb, nla);
83d2b9ba
JR		 2714 return 0;
2715}
2716
e6445719
PS		 2717int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb)
2718{
2719 const struct nlattr *a;
2720 int rem, err;
2721
2722 nla_for_each_attr(a, attr, len, rem) {
2723 int type = nla_type(a);
2724
2725 switch (type) {
2726 case OVS_ACTION_ATTR_SET:
2727 err = set_action_to_attr(a, skb);
2728 if (err)
2729 return err;
2730 break;
2731
83d2b9ba
JR		 2732 case OVS_ACTION_ATTR_SET_TO_MASKED:
2733 err = masked_set_action_to_set_action_attr(a, skb);
2734 if (err)
2735 return err;
2736 break;
2737
e6445719
PS		 2738 case OVS_ACTION_ATTR_SAMPLE:
2739 err = sample_action_to_attr(a, skb);
2740 if (err)
2741 return err;
2742 break;
7f8a436e
JS		 2743
2744 case OVS_ACTION_ATTR_CT:
2745 err = ovs_ct_action_to_attr(nla_data(a), skb);
2746 if (err)
2747 return err;
2748 break;
2749
e6445719
PS		 2750 default:
2751 if (nla_put(skb, type, nla_len(a), nla_data(a)))
2752 return -EMSGSIZE;
2753 break;
2754 }
2755 }
2756
2757 return 0;
2758}
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