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1/*
2 * Copyright (c) 2007-2014 Nicira, Inc.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of version 2 of the GNU General Public
6 * License as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
16 * 02110-1301, USA
17 */
18
19#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
20
21#include "flow.h"
22#include "datapath.h"
23#include <linux/uaccess.h>
24#include <linux/netdevice.h>
25#include <linux/etherdevice.h>
26#include <linux/if_ether.h>
27#include <linux/if_vlan.h>
28#include <net/llc_pdu.h>
29#include <linux/kernel.h>
30#include <linux/jhash.h>
31#include <linux/jiffies.h>
32#include <linux/llc.h>
33#include <linux/module.h>
34#include <linux/in.h>
35#include <linux/rcupdate.h>
36#include <linux/if_arp.h>
37#include <linux/ip.h>
38#include <linux/ipv6.h>
39#include <linux/sctp.h>
40#include <linux/tcp.h>
41#include <linux/udp.h>
42#include <linux/icmp.h>
43#include <linux/icmpv6.h>
44#include <linux/rculist.h>
45#include <net/geneve.h>
46#include <net/ip.h>
47#include <net/ipv6.h>
48#include <net/ndisc.h>
49#include <net/mpls.h>
50#include <net/vxlan.h>
51
52#include "flow_netlink.h"
53
54struct ovs_len_tbl {
55 int len;
56 const struct ovs_len_tbl *next;
57};
58
59#define OVS_ATTR_NESTED -1
60#define OVS_ATTR_VARIABLE -2
61
62static void update_range(struct sw_flow_match *match,
63 size_t offset, size_t size, bool is_mask)
64{
65 struct sw_flow_key_range *range;
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;
71 else
72 range = &match->mask->range;
73
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 { \
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 \
94 (match)->key->field = value; \
95 } while (0)
96
97#define SW_FLOW_KEY_MEMCPY_OFFSET(match, offset, value_p, len, is_mask) \
98 do { \
99 update_range(match, offset, len, is_mask); \
100 if (is_mask) \
101 memcpy((u8 *)&(match)->mask->key + offset, value_p, \
102 len); \
103 else \
104 memcpy((u8 *)(match)->key + offset, value_p, len); \
105 } while (0)
106
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
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 \
119 memset((u8 *)&(match)->key->field, value, \
120 sizeof((match)->key->field)); \
121 } while (0)
122
123static bool match_validate(const struct sw_flow_match *match,
124 u64 key_attrs, u64 mask_attrs, bool log)
125{
126 u64 key_expected = 0;
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)
132 | (1 << OVS_KEY_ATTR_IPV6)
133 | (1 << OVS_KEY_ATTR_TCP)
134 | (1 << OVS_KEY_ATTR_TCP_FLAGS)
135 | (1 << OVS_KEY_ATTR_UDP)
136 | (1 << OVS_KEY_ATTR_SCTP)
137 | (1 << OVS_KEY_ATTR_ICMP)
138 | (1 << OVS_KEY_ATTR_ICMPV6)
139 | (1 << OVS_KEY_ATTR_ARP)
140 | (1 << OVS_KEY_ATTR_ND)
141 | (1 << OVS_KEY_ATTR_MPLS));
142
143 /* Always allowed mask fields. */
144 mask_allowed |= ((1 << OVS_KEY_ATTR_TUNNEL)
145 | (1 << OVS_KEY_ATTR_IN_PORT)
146 | (1 << OVS_KEY_ATTR_ETHERTYPE));
147
148 /* Check key attributes. */
149 if (match->key->eth.type == htons(ETH_P_ARP)
150 || match->key->eth.type == htons(ETH_P_RARP)) {
151 key_expected |= 1 << OVS_KEY_ATTR_ARP;
152 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
153 mask_allowed |= 1 << OVS_KEY_ATTR_ARP;
154 }
155
156 if (eth_p_mpls(match->key->eth.type)) {
157 key_expected |= 1 << OVS_KEY_ATTR_MPLS;
158 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
159 mask_allowed |= 1 << OVS_KEY_ATTR_MPLS;
160 }
161
162 if (match->key->eth.type == htons(ETH_P_IP)) {
163 key_expected |= 1 << OVS_KEY_ATTR_IPV4;
164 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
165 mask_allowed |= 1 << OVS_KEY_ATTR_IPV4;
166
167 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
168 if (match->key->ip.proto == IPPROTO_UDP) {
169 key_expected |= 1 << OVS_KEY_ATTR_UDP;
170 if (match->mask && (match->mask->key.ip.proto == 0xff))
171 mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
172 }
173
174 if (match->key->ip.proto == IPPROTO_SCTP) {
175 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
176 if (match->mask && (match->mask->key.ip.proto == 0xff))
177 mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
178 }
179
180 if (match->key->ip.proto == IPPROTO_TCP) {
181 key_expected |= 1 << OVS_KEY_ATTR_TCP;
182 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
183 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
184 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
185 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
186 }
187 }
188
189 if (match->key->ip.proto == IPPROTO_ICMP) {
190 key_expected |= 1 << OVS_KEY_ATTR_ICMP;
191 if (match->mask && (match->mask->key.ip.proto == 0xff))
192 mask_allowed |= 1 << OVS_KEY_ATTR_ICMP;
193 }
194 }
195 }
196
197 if (match->key->eth.type == htons(ETH_P_IPV6)) {
198 key_expected |= 1 << OVS_KEY_ATTR_IPV6;
199 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
200 mask_allowed |= 1 << OVS_KEY_ATTR_IPV6;
201
202 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
203 if (match->key->ip.proto == IPPROTO_UDP) {
204 key_expected |= 1 << OVS_KEY_ATTR_UDP;
205 if (match->mask && (match->mask->key.ip.proto == 0xff))
206 mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
207 }
208
209 if (match->key->ip.proto == IPPROTO_SCTP) {
210 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
211 if (match->mask && (match->mask->key.ip.proto == 0xff))
212 mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
213 }
214
215 if (match->key->ip.proto == IPPROTO_TCP) {
216 key_expected |= 1 << OVS_KEY_ATTR_TCP;
217 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
218 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
219 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
220 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
221 }
222 }
223
224 if (match->key->ip.proto == IPPROTO_ICMPV6) {
225 key_expected |= 1 << OVS_KEY_ATTR_ICMPV6;
226 if (match->mask && (match->mask->key.ip.proto == 0xff))
227 mask_allowed |= 1 << OVS_KEY_ATTR_ICMPV6;
228
229 if (match->key->tp.src ==
230 htons(NDISC_NEIGHBOUR_SOLICITATION) ||
231 match->key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) {
232 key_expected |= 1 << OVS_KEY_ATTR_ND;
233 if (match->mask && (match->mask->key.tp.src == htons(0xff)))
234 mask_allowed |= 1 << OVS_KEY_ATTR_ND;
235 }
236 }
237 }
238 }
239
240 if ((key_attrs & key_expected) != key_expected) {
241 /* Key attributes check failed. */
242 OVS_NLERR(log, "Missing key (keys=%llx, expected=%llx)",
243 (unsigned long long)key_attrs,
244 (unsigned long long)key_expected);
245 return false;
246 }
247
248 if ((mask_attrs & mask_allowed) != mask_attrs) {
249 /* Mask attributes check failed. */
250 OVS_NLERR(log, "Unexpected mask (mask=%llx, allowed=%llx)",
251 (unsigned long long)mask_attrs,
252 (unsigned long long)mask_allowed);
253 return false;
254 }
255
256 return true;
257}
258
259size_t ovs_tun_key_attr_size(void)
260{
261 /* Whenever adding new OVS_TUNNEL_KEY_ FIELDS, we should consider
262 * updating this function.
263 */
264 return nla_total_size_64bit(8) /* OVS_TUNNEL_KEY_ATTR_ID */
265 + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_SRC */
266 + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_DST */
267 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */
268 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */
269 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */
270 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */
271 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_OAM */
272 + nla_total_size(256) /* OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS */
273 /* OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS is mutually exclusive with
274 * OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS and covered by it.
275 */
276 + nla_total_size(2) /* OVS_TUNNEL_KEY_ATTR_TP_SRC */
277 + nla_total_size(2); /* OVS_TUNNEL_KEY_ATTR_TP_DST */
278}
279
280size_t ovs_key_attr_size(void)
281{
282 /* Whenever adding new OVS_KEY_ FIELDS, we should consider
283 * updating this function.
284 */
285 BUILD_BUG_ON(OVS_KEY_ATTR_TUNNEL_INFO != 26);
286
287 return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */
288 + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */
289 + ovs_tun_key_attr_size()
290 + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */
291 + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */
292 + nla_total_size(4) /* OVS_KEY_ATTR_DP_HASH */
293 + nla_total_size(4) /* OVS_KEY_ATTR_RECIRC_ID */
294 + nla_total_size(4) /* OVS_KEY_ATTR_CT_STATE */
295 + nla_total_size(2) /* OVS_KEY_ATTR_CT_ZONE */
296 + nla_total_size(4) /* OVS_KEY_ATTR_CT_MARK */
297 + nla_total_size(16) /* OVS_KEY_ATTR_CT_LABELS */
298 + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */
299 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
300 + nla_total_size(4) /* OVS_KEY_ATTR_VLAN */
301 + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */
302 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
303 + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */
304 + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */
305 + nla_total_size(28); /* OVS_KEY_ATTR_ND */
306}
307
308static const struct ovs_len_tbl ovs_vxlan_ext_key_lens[OVS_VXLAN_EXT_MAX + 1] = {
309 [OVS_VXLAN_EXT_GBP] = { .len = sizeof(u32) },
310};
311
312static const struct ovs_len_tbl ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = {
313 [OVS_TUNNEL_KEY_ATTR_ID] = { .len = sizeof(u64) },
314 [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = { .len = sizeof(u32) },
315 [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = { .len = sizeof(u32) },
316 [OVS_TUNNEL_KEY_ATTR_TOS] = { .len = 1 },
317 [OVS_TUNNEL_KEY_ATTR_TTL] = { .len = 1 },
318 [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = { .len = 0 },
319 [OVS_TUNNEL_KEY_ATTR_CSUM] = { .len = 0 },
320 [OVS_TUNNEL_KEY_ATTR_TP_SRC] = { .len = sizeof(u16) },
321 [OVS_TUNNEL_KEY_ATTR_TP_DST] = { .len = sizeof(u16) },
322 [OVS_TUNNEL_KEY_ATTR_OAM] = { .len = 0 },
323 [OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS] = { .len = OVS_ATTR_VARIABLE },
324 [OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS] = { .len = OVS_ATTR_NESTED,
325 .next = ovs_vxlan_ext_key_lens },
326 [OVS_TUNNEL_KEY_ATTR_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
327 [OVS_TUNNEL_KEY_ATTR_IPV6_DST] = { .len = sizeof(struct in6_addr) },
328};
329
330/* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */
331static const struct ovs_len_tbl ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = {
332 [OVS_KEY_ATTR_ENCAP] = { .len = OVS_ATTR_NESTED },
333 [OVS_KEY_ATTR_PRIORITY] = { .len = sizeof(u32) },
334 [OVS_KEY_ATTR_IN_PORT] = { .len = sizeof(u32) },
335 [OVS_KEY_ATTR_SKB_MARK] = { .len = sizeof(u32) },
336 [OVS_KEY_ATTR_ETHERNET] = { .len = sizeof(struct ovs_key_ethernet) },
337 [OVS_KEY_ATTR_VLAN] = { .len = sizeof(__be16) },
338 [OVS_KEY_ATTR_ETHERTYPE] = { .len = sizeof(__be16) },
339 [OVS_KEY_ATTR_IPV4] = { .len = sizeof(struct ovs_key_ipv4) },
340 [OVS_KEY_ATTR_IPV6] = { .len = sizeof(struct ovs_key_ipv6) },
341 [OVS_KEY_ATTR_TCP] = { .len = sizeof(struct ovs_key_tcp) },
342 [OVS_KEY_ATTR_TCP_FLAGS] = { .len = sizeof(__be16) },
343 [OVS_KEY_ATTR_UDP] = { .len = sizeof(struct ovs_key_udp) },
344 [OVS_KEY_ATTR_SCTP] = { .len = sizeof(struct ovs_key_sctp) },
345 [OVS_KEY_ATTR_ICMP] = { .len = sizeof(struct ovs_key_icmp) },
346 [OVS_KEY_ATTR_ICMPV6] = { .len = sizeof(struct ovs_key_icmpv6) },
347 [OVS_KEY_ATTR_ARP] = { .len = sizeof(struct ovs_key_arp) },
348 [OVS_KEY_ATTR_ND] = { .len = sizeof(struct ovs_key_nd) },
349 [OVS_KEY_ATTR_RECIRC_ID] = { .len = sizeof(u32) },
350 [OVS_KEY_ATTR_DP_HASH] = { .len = sizeof(u32) },
351 [OVS_KEY_ATTR_TUNNEL] = { .len = OVS_ATTR_NESTED,
352 .next = ovs_tunnel_key_lens, },
353 [OVS_KEY_ATTR_MPLS] = { .len = sizeof(struct ovs_key_mpls) },
354 [OVS_KEY_ATTR_CT_STATE] = { .len = sizeof(u32) },
355 [OVS_KEY_ATTR_CT_ZONE] = { .len = sizeof(u16) },
356 [OVS_KEY_ATTR_CT_MARK] = { .len = sizeof(u32) },
357 [OVS_KEY_ATTR_CT_LABELS] = { .len = sizeof(struct ovs_key_ct_labels) },
358};
359
360static bool check_attr_len(unsigned int attr_len, unsigned int expected_len)
361{
362 return expected_len == attr_len ||
363 expected_len == OVS_ATTR_NESTED ||
364 expected_len == OVS_ATTR_VARIABLE;
365}
366
367static bool is_all_zero(const u8 *fp, size_t size)
368{
369 int i;
370
371 if (!fp)
372 return false;
373
374 for (i = 0; i < size; i++)
375 if (fp[i])
376 return false;
377
378 return true;
379}
380
381static int __parse_flow_nlattrs(const struct nlattr *attr,
382 const struct nlattr *a[],
383 u64 *attrsp, bool log, bool nz)
384{
385 const struct nlattr *nla;
386 u64 attrs;
387 int rem;
388
389 attrs = *attrsp;
390 nla_for_each_nested(nla, attr, rem) {
391 u16 type = nla_type(nla);
392 int expected_len;
393
394 if (type > OVS_KEY_ATTR_MAX) {
395 OVS_NLERR(log, "Key type %d is out of range max %d",
396 type, OVS_KEY_ATTR_MAX);
397 return -EINVAL;
398 }
399
400 if (attrs & (1 << type)) {
401 OVS_NLERR(log, "Duplicate key (type %d).", type);
402 return -EINVAL;
403 }
404
405 expected_len = ovs_key_lens[type].len;
406 if (!check_attr_len(nla_len(nla), expected_len)) {
407 OVS_NLERR(log, "Key %d has unexpected len %d expected %d",
408 type, nla_len(nla), expected_len);
409 return -EINVAL;
410 }
411
412 if (!nz || !is_all_zero(nla_data(nla), expected_len)) {
413 attrs |= 1 << type;
414 a[type] = nla;
415 }
416 }
417 if (rem) {
418 OVS_NLERR(log, "Message has %d unknown bytes.", rem);
419 return -EINVAL;
420 }
421
422 *attrsp = attrs;
423 return 0;
424}
425
426static int parse_flow_mask_nlattrs(const struct nlattr *attr,
427 const struct nlattr *a[], u64 *attrsp,
428 bool log)
429{
430 return __parse_flow_nlattrs(attr, a, attrsp, log, true);
431}
432
433static int parse_flow_nlattrs(const struct nlattr *attr,
434 const struct nlattr *a[], u64 *attrsp,
435 bool log)
436{
437 return __parse_flow_nlattrs(attr, a, attrsp, log, false);
438}
439
440static int genev_tun_opt_from_nlattr(const struct nlattr *a,
441 struct sw_flow_match *match, bool is_mask,
442 bool log)
443{
444 unsigned long opt_key_offset;
445
446 if (nla_len(a) > sizeof(match->key->tun_opts)) {
447 OVS_NLERR(log, "Geneve option length err (len %d, max %zu).",
448 nla_len(a), sizeof(match->key->tun_opts));
449 return -EINVAL;
450 }
451
452 if (nla_len(a) % 4 != 0) {
453 OVS_NLERR(log, "Geneve opt len %d is not a multiple of 4.",
454 nla_len(a));
455 return -EINVAL;
456 }
457
458 /* We need to record the length of the options passed
459 * down, otherwise packets with the same format but
460 * additional options will be silently matched.
461 */
462 if (!is_mask) {
463 SW_FLOW_KEY_PUT(match, tun_opts_len, nla_len(a),
464 false);
465 } else {
466 /* This is somewhat unusual because it looks at
467 * both the key and mask while parsing the
468 * attributes (and by extension assumes the key
469 * is parsed first). Normally, we would verify
470 * that each is the correct length and that the
471 * attributes line up in the validate function.
472 * However, that is difficult because this is
473 * variable length and we won't have the
474 * information later.
475 */
476 if (match->key->tun_opts_len != nla_len(a)) {
477 OVS_NLERR(log, "Geneve option len %d != mask len %d",
478 match->key->tun_opts_len, nla_len(a));
479 return -EINVAL;
480 }
481
482 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
483 }
484
485 opt_key_offset = TUN_METADATA_OFFSET(nla_len(a));
486 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, nla_data(a),
487 nla_len(a), is_mask);
488 return 0;
489}
490
491static int vxlan_tun_opt_from_nlattr(const struct nlattr *attr,
492 struct sw_flow_match *match, bool is_mask,
493 bool log)
494{
495 struct nlattr *a;
496 int rem;
497 unsigned long opt_key_offset;
498 struct vxlan_metadata opts;
499
500 BUILD_BUG_ON(sizeof(opts) > sizeof(match->key->tun_opts));
501
502 memset(&opts, 0, sizeof(opts));
503 nla_for_each_nested(a, attr, rem) {
504 int type = nla_type(a);
505
506 if (type > OVS_VXLAN_EXT_MAX) {
507 OVS_NLERR(log, "VXLAN extension %d out of range max %d",
508 type, OVS_VXLAN_EXT_MAX);
509 return -EINVAL;
510 }
511
512 if (!check_attr_len(nla_len(a),
513 ovs_vxlan_ext_key_lens[type].len)) {
514 OVS_NLERR(log, "VXLAN extension %d has unexpected len %d expected %d",
515 type, nla_len(a),
516 ovs_vxlan_ext_key_lens[type].len);
517 return -EINVAL;
518 }
519
520 switch (type) {
521 case OVS_VXLAN_EXT_GBP:
522 opts.gbp = nla_get_u32(a);
523 break;
524 default:
525 OVS_NLERR(log, "Unknown VXLAN extension attribute %d",
526 type);
527 return -EINVAL;
528 }
529 }
530 if (rem) {
531 OVS_NLERR(log, "VXLAN extension message has %d unknown bytes.",
532 rem);
533 return -EINVAL;
534 }
535
536 if (!is_mask)
537 SW_FLOW_KEY_PUT(match, tun_opts_len, sizeof(opts), false);
538 else
539 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
540
541 opt_key_offset = TUN_METADATA_OFFSET(sizeof(opts));
542 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, &opts, sizeof(opts),
543 is_mask);
544 return 0;
545}
546
547static int ip_tun_from_nlattr(const struct nlattr *attr,
548 struct sw_flow_match *match, bool is_mask,
549 bool log)
550{
551 bool ttl = false, ipv4 = false, ipv6 = false;
552 __be16 tun_flags = 0;
553 int opts_type = 0;
554 struct nlattr *a;
555 int rem;
556
557 nla_for_each_nested(a, attr, rem) {
558 int type = nla_type(a);
559 int err;
560
561 if (type > OVS_TUNNEL_KEY_ATTR_MAX) {
562 OVS_NLERR(log, "Tunnel attr %d out of range max %d",
563 type, OVS_TUNNEL_KEY_ATTR_MAX);
564 return -EINVAL;
565 }
566
567 if (!check_attr_len(nla_len(a),
568 ovs_tunnel_key_lens[type].len)) {
569 OVS_NLERR(log, "Tunnel attr %d has unexpected len %d expected %d",
570 type, nla_len(a), ovs_tunnel_key_lens[type].len);
571 return -EINVAL;
572 }
573
574 switch (type) {
575 case OVS_TUNNEL_KEY_ATTR_ID:
576 SW_FLOW_KEY_PUT(match, tun_key.tun_id,
577 nla_get_be64(a), is_mask);
578 tun_flags |= TUNNEL_KEY;
579 break;
580 case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
581 SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.src,
582 nla_get_in_addr(a), is_mask);
583 ipv4 = true;
584 break;
585 case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
586 SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.dst,
587 nla_get_in_addr(a), is_mask);
588 ipv4 = true;
589 break;
590 case OVS_TUNNEL_KEY_ATTR_IPV6_SRC:
591 SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.src,
592 nla_get_in6_addr(a), is_mask);
593 ipv6 = true;
594 break;
595 case OVS_TUNNEL_KEY_ATTR_IPV6_DST:
596 SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.dst,
597 nla_get_in6_addr(a), is_mask);
598 ipv6 = true;
599 break;
600 case OVS_TUNNEL_KEY_ATTR_TOS:
601 SW_FLOW_KEY_PUT(match, tun_key.tos,
602 nla_get_u8(a), is_mask);
603 break;
604 case OVS_TUNNEL_KEY_ATTR_TTL:
605 SW_FLOW_KEY_PUT(match, tun_key.ttl,
606 nla_get_u8(a), is_mask);
607 ttl = true;
608 break;
609 case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
610 tun_flags |= TUNNEL_DONT_FRAGMENT;
611 break;
612 case OVS_TUNNEL_KEY_ATTR_CSUM:
613 tun_flags |= TUNNEL_CSUM;
614 break;
615 case OVS_TUNNEL_KEY_ATTR_TP_SRC:
616 SW_FLOW_KEY_PUT(match, tun_key.tp_src,
617 nla_get_be16(a), is_mask);
618 break;
619 case OVS_TUNNEL_KEY_ATTR_TP_DST:
620 SW_FLOW_KEY_PUT(match, tun_key.tp_dst,
621 nla_get_be16(a), is_mask);
622 break;
623 case OVS_TUNNEL_KEY_ATTR_OAM:
624 tun_flags |= TUNNEL_OAM;
625 break;
626 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
627 if (opts_type) {
628 OVS_NLERR(log, "Multiple metadata blocks provided");
629 return -EINVAL;
630 }
631
632 err = genev_tun_opt_from_nlattr(a, match, is_mask, log);
633 if (err)
634 return err;
635
636 tun_flags |= TUNNEL_GENEVE_OPT;
637 opts_type = type;
638 break;
639 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
640 if (opts_type) {
641 OVS_NLERR(log, "Multiple metadata blocks provided");
642 return -EINVAL;
643 }
644
645 err = vxlan_tun_opt_from_nlattr(a, match, is_mask, log);
646 if (err)
647 return err;
648
649 tun_flags |= TUNNEL_VXLAN_OPT;
650 opts_type = type;
651 break;
652 case OVS_TUNNEL_KEY_ATTR_PAD:
653 break;
654 default:
655 OVS_NLERR(log, "Unknown IP tunnel attribute %d",
656 type);
657 return -EINVAL;
658 }
659 }
660
661 SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask);
662 if (is_mask)
663 SW_FLOW_KEY_MEMSET_FIELD(match, tun_proto, 0xff, true);
664 else
665 SW_FLOW_KEY_PUT(match, tun_proto, ipv6 ? AF_INET6 : AF_INET,
666 false);
667
668 if (rem > 0) {
669 OVS_NLERR(log, "IP tunnel attribute has %d unknown bytes.",
670 rem);
671 return -EINVAL;
672 }
673
674 if (ipv4 && ipv6) {
675 OVS_NLERR(log, "Mixed IPv4 and IPv6 tunnel attributes");
676 return -EINVAL;
677 }
678
679 if (!is_mask) {
680 if (!ipv4 && !ipv6) {
681 OVS_NLERR(log, "IP tunnel dst address not specified");
682 return -EINVAL;
683 }
684 if (ipv4 && !match->key->tun_key.u.ipv4.dst) {
685 OVS_NLERR(log, "IPv4 tunnel dst address is zero");
686 return -EINVAL;
687 }
688 if (ipv6 && ipv6_addr_any(&match->key->tun_key.u.ipv6.dst)) {
689 OVS_NLERR(log, "IPv6 tunnel dst address is zero");
690 return -EINVAL;
691 }
692
693 if (!ttl) {
694 OVS_NLERR(log, "IP tunnel TTL not specified.");
695 return -EINVAL;
696 }
697 }
698
699 return opts_type;
700}
701
702static int vxlan_opt_to_nlattr(struct sk_buff *skb,
703 const void *tun_opts, int swkey_tun_opts_len)
704{
705 const struct vxlan_metadata *opts = tun_opts;
706 struct nlattr *nla;
707
708 nla = nla_nest_start(skb, OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS);
709 if (!nla)
710 return -EMSGSIZE;
711
712 if (nla_put_u32(skb, OVS_VXLAN_EXT_GBP, opts->gbp) < 0)
713 return -EMSGSIZE;
714
715 nla_nest_end(skb, nla);
716 return 0;
717}
718
719static int __ip_tun_to_nlattr(struct sk_buff *skb,
720 const struct ip_tunnel_key *output,
721 const void *tun_opts, int swkey_tun_opts_len,
722 unsigned short tun_proto)
723{
724 if (output->tun_flags & TUNNEL_KEY &&
725 nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id,
726 OVS_TUNNEL_KEY_ATTR_PAD))
727 return -EMSGSIZE;
728 switch (tun_proto) {
729 case AF_INET:
730 if (output->u.ipv4.src &&
731 nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC,
732 output->u.ipv4.src))
733 return -EMSGSIZE;
734 if (output->u.ipv4.dst &&
735 nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST,
736 output->u.ipv4.dst))
737 return -EMSGSIZE;
738 break;
739 case AF_INET6:
740 if (!ipv6_addr_any(&output->u.ipv6.src) &&
741 nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_SRC,
742 &output->u.ipv6.src))
743 return -EMSGSIZE;
744 if (!ipv6_addr_any(&output->u.ipv6.dst) &&
745 nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_DST,
746 &output->u.ipv6.dst))
747 return -EMSGSIZE;
748 break;
749 }
750 if (output->tos &&
751 nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->tos))
752 return -EMSGSIZE;
753 if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ttl))
754 return -EMSGSIZE;
755 if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) &&
756 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT))
757 return -EMSGSIZE;
758 if ((output->tun_flags & TUNNEL_CSUM) &&
759 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM))
760 return -EMSGSIZE;
761 if (output->tp_src &&
762 nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_SRC, output->tp_src))
763 return -EMSGSIZE;
764 if (output->tp_dst &&
765 nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_DST, output->tp_dst))
766 return -EMSGSIZE;
767 if ((output->tun_flags & TUNNEL_OAM) &&
768 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM))
769 return -EMSGSIZE;
770 if (swkey_tun_opts_len) {
771 if (output->tun_flags & TUNNEL_GENEVE_OPT &&
772 nla_put(skb, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS,
773 swkey_tun_opts_len, tun_opts))
774 return -EMSGSIZE;
775 else if (output->tun_flags & TUNNEL_VXLAN_OPT &&
776 vxlan_opt_to_nlattr(skb, tun_opts, swkey_tun_opts_len))
777 return -EMSGSIZE;
778 }
779
780 return 0;
781}
782
783static int ip_tun_to_nlattr(struct sk_buff *skb,
784 const struct ip_tunnel_key *output,
785 const void *tun_opts, int swkey_tun_opts_len,
786 unsigned short tun_proto)
787{
788 struct nlattr *nla;
789 int err;
790
791 nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL);
792 if (!nla)
793 return -EMSGSIZE;
794
795 err = __ip_tun_to_nlattr(skb, output, tun_opts, swkey_tun_opts_len,
796 tun_proto);
797 if (err)
798 return err;
799
800 nla_nest_end(skb, nla);
801 return 0;
802}
803
804int ovs_nla_put_tunnel_info(struct sk_buff *skb,
805 struct ip_tunnel_info *tun_info)
806{
807 return __ip_tun_to_nlattr(skb, &tun_info->key,
808 ip_tunnel_info_opts(tun_info),
809 tun_info->options_len,
810 ip_tunnel_info_af(tun_info));
811}
812
813static int encode_vlan_from_nlattrs(struct sw_flow_match *match,
814 const struct nlattr *a[],
815 bool is_mask, bool inner)
816{
817 __be16 tci = 0;
818 __be16 tpid = 0;
819
820 if (a[OVS_KEY_ATTR_VLAN])
821 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
822
823 if (a[OVS_KEY_ATTR_ETHERTYPE])
824 tpid = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
825
826 if (likely(!inner)) {
827 SW_FLOW_KEY_PUT(match, eth.vlan.tpid, tpid, is_mask);
828 SW_FLOW_KEY_PUT(match, eth.vlan.tci, tci, is_mask);
829 } else {
830 SW_FLOW_KEY_PUT(match, eth.cvlan.tpid, tpid, is_mask);
831 SW_FLOW_KEY_PUT(match, eth.cvlan.tci, tci, is_mask);
832 }
833 return 0;
834}
835
836static int validate_vlan_from_nlattrs(const struct sw_flow_match *match,
837 u64 key_attrs, bool inner,
838 const struct nlattr **a, bool log)
839{
840 __be16 tci = 0;
841
842 if (!((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) &&
843 (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) &&
844 eth_type_vlan(nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE])))) {
845 /* Not a VLAN. */
846 return 0;
847 }
848
849 if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) &&
850 (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) {
851 OVS_NLERR(log, "Invalid %s frame", (inner) ? "C-VLAN" : "VLAN");
852 return -EINVAL;
853 }
854
855 if (a[OVS_KEY_ATTR_VLAN])
856 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
857
858 if (!(tci & htons(VLAN_TAG_PRESENT))) {
859 if (tci) {
860 OVS_NLERR(log, "%s TCI does not have VLAN_TAG_PRESENT bit set.",
861 (inner) ? "C-VLAN" : "VLAN");
862 return -EINVAL;
863 } else if (nla_len(a[OVS_KEY_ATTR_ENCAP])) {
864 /* Corner case for truncated VLAN header. */
865 OVS_NLERR(log, "Truncated %s header has non-zero encap attribute.",
866 (inner) ? "C-VLAN" : "VLAN");
867 return -EINVAL;
868 }
869 }
870
871 return 1;
872}
873
874static int validate_vlan_mask_from_nlattrs(const struct sw_flow_match *match,
875 u64 key_attrs, bool inner,
876 const struct nlattr **a, bool log)
877{
878 __be16 tci = 0;
879 __be16 tpid = 0;
880 bool encap_valid = !!(match->key->eth.vlan.tci &
881 htons(VLAN_TAG_PRESENT));
882 bool i_encap_valid = !!(match->key->eth.cvlan.tci &
883 htons(VLAN_TAG_PRESENT));
884
885 if (!(key_attrs & (1 << OVS_KEY_ATTR_ENCAP))) {
886 /* Not a VLAN. */
887 return 0;
888 }
889
890 if ((!inner && !encap_valid) || (inner && !i_encap_valid)) {
891 OVS_NLERR(log, "Encap mask attribute is set for non-%s frame.",
892 (inner) ? "C-VLAN" : "VLAN");
893 return -EINVAL;
894 }
895
896 if (a[OVS_KEY_ATTR_VLAN])
897 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
898
899 if (a[OVS_KEY_ATTR_ETHERTYPE])
900 tpid = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
901
902 if (tpid != htons(0xffff)) {
903 OVS_NLERR(log, "Must have an exact match on %s TPID (mask=%x).",
904 (inner) ? "C-VLAN" : "VLAN", ntohs(tpid));
905 return -EINVAL;
906 }
907 if (!(tci & htons(VLAN_TAG_PRESENT))) {
908 OVS_NLERR(log, "%s TCI mask does not have exact match for VLAN_TAG_PRESENT bit.",
909 (inner) ? "C-VLAN" : "VLAN");
910 return -EINVAL;
911 }
912
913 return 1;
914}
915
916static int __parse_vlan_from_nlattrs(struct sw_flow_match *match,
917 u64 *key_attrs, bool inner,
918 const struct nlattr **a, bool is_mask,
919 bool log)
920{
921 int err;
922 const struct nlattr *encap;
923
924 if (!is_mask)
925 err = validate_vlan_from_nlattrs(match, *key_attrs, inner,
926 a, log);
927 else
928 err = validate_vlan_mask_from_nlattrs(match, *key_attrs, inner,
929 a, log);
930 if (err <= 0)
931 return err;
932
933 err = encode_vlan_from_nlattrs(match, a, is_mask, inner);
934 if (err)
935 return err;
936
937 *key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP);
938 *key_attrs &= ~(1 << OVS_KEY_ATTR_VLAN);
939 *key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
940
941 encap = a[OVS_KEY_ATTR_ENCAP];
942
943 if (!is_mask)
944 err = parse_flow_nlattrs(encap, a, key_attrs, log);
945 else
946 err = parse_flow_mask_nlattrs(encap, a, key_attrs, log);
947
948 return err;
949}
950
951static int parse_vlan_from_nlattrs(struct sw_flow_match *match,
952 u64 *key_attrs, const struct nlattr **a,
953 bool is_mask, bool log)
954{
955 int err;
956 bool encap_valid = false;
957
958 err = __parse_vlan_from_nlattrs(match, key_attrs, false, a,
959 is_mask, log);
960 if (err)
961 return err;
962
963 encap_valid = !!(match->key->eth.vlan.tci & htons(VLAN_TAG_PRESENT));
964 if (encap_valid) {
965 err = __parse_vlan_from_nlattrs(match, key_attrs, true, a,
966 is_mask, log);
967 if (err)
968 return err;
969 }
970
971 return 0;
972}
973
974static int parse_eth_type_from_nlattrs(struct sw_flow_match *match,
975 u64 *attrs, const struct nlattr **a,
976 bool is_mask, bool log)
977{
978 __be16 eth_type;
979
980 eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
981 if (is_mask) {
982 /* Always exact match EtherType. */
983 eth_type = htons(0xffff);
984 } else if (!eth_proto_is_802_3(eth_type)) {
985 OVS_NLERR(log, "EtherType %x is less than min %x",
986 ntohs(eth_type), ETH_P_802_3_MIN);
987 return -EINVAL;
988 }
989
990 SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask);
991 *attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
992 return 0;
993}
994
995static int metadata_from_nlattrs(struct net *net, struct sw_flow_match *match,
996 u64 *attrs, const struct nlattr **a,
997 bool is_mask, bool log)
998{
999 u8 mac_proto = MAC_PROTO_ETHERNET;
1000
1001 if (*attrs & (1 << OVS_KEY_ATTR_DP_HASH)) {
1002 u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]);
1003
1004 SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask);
1005 *attrs &= ~(1 << OVS_KEY_ATTR_DP_HASH);
1006 }
1007
1008 if (*attrs & (1 << OVS_KEY_ATTR_RECIRC_ID)) {
1009 u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]);
1010
1011 SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask);
1012 *attrs &= ~(1 << OVS_KEY_ATTR_RECIRC_ID);
1013 }
1014
1015 if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) {
1016 SW_FLOW_KEY_PUT(match, phy.priority,
1017 nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask);
1018 *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY);
1019 }
1020
1021 if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) {
1022 u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]);
1023
1024 if (is_mask) {
1025 in_port = 0xffffffff; /* Always exact match in_port. */
1026 } else if (in_port >= DP_MAX_PORTS) {
1027 OVS_NLERR(log, "Port %d exceeds max allowable %d",
1028 in_port, DP_MAX_PORTS);
1029 return -EINVAL;
1030 }
1031
1032 SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask);
1033 *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT);
1034 } else if (!is_mask) {
1035 SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask);
1036 }
1037
1038 if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) {
1039 uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]);
1040
1041 SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask);
1042 *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK);
1043 }
1044 if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) {
1045 if (ip_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match,
1046 is_mask, log) < 0)
1047 return -EINVAL;
1048 *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL);
1049 }
1050
1051 if (*attrs & (1 << OVS_KEY_ATTR_CT_STATE) &&
1052 ovs_ct_verify(net, OVS_KEY_ATTR_CT_STATE)) {
1053 u32 ct_state = nla_get_u32(a[OVS_KEY_ATTR_CT_STATE]);
1054
1055 if (ct_state & ~CT_SUPPORTED_MASK) {
1056 OVS_NLERR(log, "ct_state flags %08x unsupported",
1057 ct_state);
1058 return -EINVAL;
1059 }
1060
1061 SW_FLOW_KEY_PUT(match, ct.state, ct_state, is_mask);
1062 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_STATE);
1063 }
1064 if (*attrs & (1 << OVS_KEY_ATTR_CT_ZONE) &&
1065 ovs_ct_verify(net, OVS_KEY_ATTR_CT_ZONE)) {
1066 u16 ct_zone = nla_get_u16(a[OVS_KEY_ATTR_CT_ZONE]);
1067
1068 SW_FLOW_KEY_PUT(match, ct.zone, ct_zone, is_mask);
1069 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ZONE);
1070 }
1071 if (*attrs & (1 << OVS_KEY_ATTR_CT_MARK) &&
1072 ovs_ct_verify(net, OVS_KEY_ATTR_CT_MARK)) {
1073 u32 mark = nla_get_u32(a[OVS_KEY_ATTR_CT_MARK]);
1074
1075 SW_FLOW_KEY_PUT(match, ct.mark, mark, is_mask);
1076 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_MARK);
1077 }
1078 if (*attrs & (1 << OVS_KEY_ATTR_CT_LABELS) &&
1079 ovs_ct_verify(net, OVS_KEY_ATTR_CT_LABELS)) {
1080 const struct ovs_key_ct_labels *cl;
1081
1082 cl = nla_data(a[OVS_KEY_ATTR_CT_LABELS]);
1083 SW_FLOW_KEY_MEMCPY(match, ct.labels, cl->ct_labels,
1084 sizeof(*cl), is_mask);
1085 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_LABELS);
1086 }
1087
1088 /* For layer 3 packets the Ethernet type is provided
1089 * and treated as metadata but no MAC addresses are provided.
1090 */
1091 if (!(*attrs & (1ULL << OVS_KEY_ATTR_ETHERNET)) &&
1092 (*attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)))
1093 mac_proto = MAC_PROTO_NONE;
1094
1095 /* Always exact match mac_proto */
1096 SW_FLOW_KEY_PUT(match, mac_proto, is_mask ? 0xff : mac_proto, is_mask);
1097
1098 if (mac_proto == MAC_PROTO_NONE)
1099 return parse_eth_type_from_nlattrs(match, attrs, a, is_mask,
1100 log);
1101
1102 return 0;
1103}
1104
1105static int ovs_key_from_nlattrs(struct net *net, struct sw_flow_match *match,
1106 u64 attrs, const struct nlattr **a,
1107 bool is_mask, bool log)
1108{
1109 int err;
1110
1111 err = metadata_from_nlattrs(net, match, &attrs, a, is_mask, log);
1112 if (err)
1113 return err;
1114
1115 if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) {
1116 const struct ovs_key_ethernet *eth_key;
1117
1118 eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]);
1119 SW_FLOW_KEY_MEMCPY(match, eth.src,
1120 eth_key->eth_src, ETH_ALEN, is_mask);
1121 SW_FLOW_KEY_MEMCPY(match, eth.dst,
1122 eth_key->eth_dst, ETH_ALEN, is_mask);
1123 attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET);
1124
1125 if (attrs & (1 << OVS_KEY_ATTR_VLAN)) {
1126 /* VLAN attribute is always parsed before getting here since it
1127 * may occur multiple times.
1128 */
1129 OVS_NLERR(log, "VLAN attribute unexpected.");
1130 return -EINVAL;
1131 }
1132
1133 if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) {
1134 err = parse_eth_type_from_nlattrs(match, &attrs, a, is_mask,
1135 log);
1136 if (err)
1137 return err;
1138 } else if (!is_mask) {
1139 SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask);
1140 }
1141 } else if (!match->key->eth.type) {
1142 OVS_NLERR(log, "Either Ethernet header or EtherType is required.");
1143 return -EINVAL;
1144 }
1145
1146 if (attrs & (1 << OVS_KEY_ATTR_IPV4)) {
1147 const struct ovs_key_ipv4 *ipv4_key;
1148
1149 ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]);
1150 if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) {
1151 OVS_NLERR(log, "IPv4 frag type %d is out of range max %d",
1152 ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX);
1153 return -EINVAL;
1154 }
1155 SW_FLOW_KEY_PUT(match, ip.proto,
1156 ipv4_key->ipv4_proto, is_mask);
1157 SW_FLOW_KEY_PUT(match, ip.tos,
1158 ipv4_key->ipv4_tos, is_mask);
1159 SW_FLOW_KEY_PUT(match, ip.ttl,
1160 ipv4_key->ipv4_ttl, is_mask);
1161 SW_FLOW_KEY_PUT(match, ip.frag,
1162 ipv4_key->ipv4_frag, is_mask);
1163 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
1164 ipv4_key->ipv4_src, is_mask);
1165 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
1166 ipv4_key->ipv4_dst, is_mask);
1167 attrs &= ~(1 << OVS_KEY_ATTR_IPV4);
1168 }
1169
1170 if (attrs & (1 << OVS_KEY_ATTR_IPV6)) {
1171 const struct ovs_key_ipv6 *ipv6_key;
1172
1173 ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]);
1174 if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) {
1175 OVS_NLERR(log, "IPv6 frag type %d is out of range max %d",
1176 ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX);
1177 return -EINVAL;
1178 }
1179
1180 if (!is_mask && ipv6_key->ipv6_label & htonl(0xFFF00000)) {
1181 OVS_NLERR(log, "IPv6 flow label %x is out of range (max=%x).\n",
1182 ntohl(ipv6_key->ipv6_label), (1 << 20) - 1);
1183 return -EINVAL;
1184 }
1185
1186 SW_FLOW_KEY_PUT(match, ipv6.label,
1187 ipv6_key->ipv6_label, is_mask);
1188 SW_FLOW_KEY_PUT(match, ip.proto,
1189 ipv6_key->ipv6_proto, is_mask);
1190 SW_FLOW_KEY_PUT(match, ip.tos,
1191 ipv6_key->ipv6_tclass, is_mask);
1192 SW_FLOW_KEY_PUT(match, ip.ttl,
1193 ipv6_key->ipv6_hlimit, is_mask);
1194 SW_FLOW_KEY_PUT(match, ip.frag,
1195 ipv6_key->ipv6_frag, is_mask);
1196 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src,
1197 ipv6_key->ipv6_src,
1198 sizeof(match->key->ipv6.addr.src),
1199 is_mask);
1200 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst,
1201 ipv6_key->ipv6_dst,
1202 sizeof(match->key->ipv6.addr.dst),
1203 is_mask);
1204
1205 attrs &= ~(1 << OVS_KEY_ATTR_IPV6);
1206 }
1207
1208 if (attrs & (1 << OVS_KEY_ATTR_ARP)) {
1209 const struct ovs_key_arp *arp_key;
1210
1211 arp_key = nla_data(a[OVS_KEY_ATTR_ARP]);
1212 if (!is_mask && (arp_key->arp_op & htons(0xff00))) {
1213 OVS_NLERR(log, "Unknown ARP opcode (opcode=%d).",
1214 arp_key->arp_op);
1215 return -EINVAL;
1216 }
1217
1218 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
1219 arp_key->arp_sip, is_mask);
1220 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
1221 arp_key->arp_tip, is_mask);
1222 SW_FLOW_KEY_PUT(match, ip.proto,
1223 ntohs(arp_key->arp_op), is_mask);
1224 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha,
1225 arp_key->arp_sha, ETH_ALEN, is_mask);
1226 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha,
1227 arp_key->arp_tha, ETH_ALEN, is_mask);
1228
1229 attrs &= ~(1 << OVS_KEY_ATTR_ARP);
1230 }
1231
1232 if (attrs & (1 << OVS_KEY_ATTR_MPLS)) {
1233 const struct ovs_key_mpls *mpls_key;
1234
1235 mpls_key = nla_data(a[OVS_KEY_ATTR_MPLS]);
1236 SW_FLOW_KEY_PUT(match, mpls.top_lse,
1237 mpls_key->mpls_lse, is_mask);
1238
1239 attrs &= ~(1 << OVS_KEY_ATTR_MPLS);
1240 }
1241
1242 if (attrs & (1 << OVS_KEY_ATTR_TCP)) {
1243 const struct ovs_key_tcp *tcp_key;
1244
1245 tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]);
1246 SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask);
1247 SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask);
1248 attrs &= ~(1 << OVS_KEY_ATTR_TCP);
1249 }
1250
1251 if (attrs & (1 << OVS_KEY_ATTR_TCP_FLAGS)) {
1252 SW_FLOW_KEY_PUT(match, tp.flags,
1253 nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]),
1254 is_mask);
1255 attrs &= ~(1 << OVS_KEY_ATTR_TCP_FLAGS);
1256 }
1257
1258 if (attrs & (1 << OVS_KEY_ATTR_UDP)) {
1259 const struct ovs_key_udp *udp_key;
1260
1261 udp_key = nla_data(a[OVS_KEY_ATTR_UDP]);
1262 SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask);
1263 SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask);
1264 attrs &= ~(1 << OVS_KEY_ATTR_UDP);
1265 }
1266
1267 if (attrs & (1 << OVS_KEY_ATTR_SCTP)) {
1268 const struct ovs_key_sctp *sctp_key;
1269
1270 sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]);
1271 SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask);
1272 SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask);
1273 attrs &= ~(1 << OVS_KEY_ATTR_SCTP);
1274 }
1275
1276 if (attrs & (1 << OVS_KEY_ATTR_ICMP)) {
1277 const struct ovs_key_icmp *icmp_key;
1278
1279 icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]);
1280 SW_FLOW_KEY_PUT(match, tp.src,
1281 htons(icmp_key->icmp_type), is_mask);
1282 SW_FLOW_KEY_PUT(match, tp.dst,
1283 htons(icmp_key->icmp_code), is_mask);
1284 attrs &= ~(1 << OVS_KEY_ATTR_ICMP);
1285 }
1286
1287 if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) {
1288 const struct ovs_key_icmpv6 *icmpv6_key;
1289
1290 icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]);
1291 SW_FLOW_KEY_PUT(match, tp.src,
1292 htons(icmpv6_key->icmpv6_type), is_mask);
1293 SW_FLOW_KEY_PUT(match, tp.dst,
1294 htons(icmpv6_key->icmpv6_code), is_mask);
1295 attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6);
1296 }
1297
1298 if (attrs & (1 << OVS_KEY_ATTR_ND)) {
1299 const struct ovs_key_nd *nd_key;
1300
1301 nd_key = nla_data(a[OVS_KEY_ATTR_ND]);
1302 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target,
1303 nd_key->nd_target,
1304 sizeof(match->key->ipv6.nd.target),
1305 is_mask);
1306 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll,
1307 nd_key->nd_sll, ETH_ALEN, is_mask);
1308 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll,
1309 nd_key->nd_tll, ETH_ALEN, is_mask);
1310 attrs &= ~(1 << OVS_KEY_ATTR_ND);
1311 }
1312
1313 if (attrs != 0) {
1314 OVS_NLERR(log, "Unknown key attributes %llx",
1315 (unsigned long long)attrs);
1316 return -EINVAL;
1317 }
1318
1319 return 0;
1320}
1321
1322static void nlattr_set(struct nlattr *attr, u8 val,
1323 const struct ovs_len_tbl *tbl)
1324{
1325 struct nlattr *nla;
1326 int rem;
1327
1328 /* The nlattr stream should already have been validated */
1329 nla_for_each_nested(nla, attr, rem) {
1330 if (tbl[nla_type(nla)].len == OVS_ATTR_NESTED) {
1331 if (tbl[nla_type(nla)].next)
1332 tbl = tbl[nla_type(nla)].next;
1333 nlattr_set(nla, val, tbl);
1334 } else {
1335 memset(nla_data(nla), val, nla_len(nla));
1336 }
1337
1338 if (nla_type(nla) == OVS_KEY_ATTR_CT_STATE)
1339 *(u32 *)nla_data(nla) &= CT_SUPPORTED_MASK;
1340 }
1341}
1342
1343static void mask_set_nlattr(struct nlattr *attr, u8 val)
1344{
1345 nlattr_set(attr, val, ovs_key_lens);
1346}
1347
1348/**
1349 * ovs_nla_get_match - parses Netlink attributes into a flow key and
1350 * mask. In case the 'mask' is NULL, the flow is treated as exact match
1351 * flow. Otherwise, it is treated as a wildcarded flow, except the mask
1352 * does not include any don't care bit.
1353 * @net: Used to determine per-namespace field support.
1354 * @match: receives the extracted flow match information.
1355 * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
1356 * sequence. The fields should of the packet that triggered the creation
1357 * of this flow.
1358 * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink
1359 * attribute specifies the mask field of the wildcarded flow.
1360 * @log: Boolean to allow kernel error logging. Normally true, but when
1361 * probing for feature compatibility this should be passed in as false to
1362 * suppress unnecessary error logging.
1363 */
1364int ovs_nla_get_match(struct net *net, struct sw_flow_match *match,
1365 const struct nlattr *nla_key,
1366 const struct nlattr *nla_mask,
1367 bool log)
1368{
1369 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
1370 struct nlattr *newmask = NULL;
1371 u64 key_attrs = 0;
1372 u64 mask_attrs = 0;
1373 int err;
1374
1375 err = parse_flow_nlattrs(nla_key, a, &key_attrs, log);
1376 if (err)
1377 return err;
1378
1379 err = parse_vlan_from_nlattrs(match, &key_attrs, a, false, log);
1380 if (err)
1381 return err;
1382
1383 err = ovs_key_from_nlattrs(net, match, key_attrs, a, false, log);
1384 if (err)
1385 return err;
1386
1387 if (match->mask) {
1388 if (!nla_mask) {
1389 /* Create an exact match mask. We need to set to 0xff
1390 * all the 'match->mask' fields that have been touched
1391 * in 'match->key'. We cannot simply memset
1392 * 'match->mask', because padding bytes and fields not
1393 * specified in 'match->key' should be left to 0.
1394 * Instead, we use a stream of netlink attributes,
1395 * copied from 'key' and set to 0xff.
1396 * ovs_key_from_nlattrs() will take care of filling
1397 * 'match->mask' appropriately.
1398 */
1399 newmask = kmemdup(nla_key,
1400 nla_total_size(nla_len(nla_key)),
1401 GFP_KERNEL);
1402 if (!newmask)
1403 return -ENOMEM;
1404
1405 mask_set_nlattr(newmask, 0xff);
1406
1407 /* The userspace does not send tunnel attributes that
1408 * are 0, but we should not wildcard them nonetheless.
1409 */
1410 if (match->key->tun_proto)
1411 SW_FLOW_KEY_MEMSET_FIELD(match, tun_key,
1412 0xff, true);
1413
1414 nla_mask = newmask;
1415 }
1416
1417 err = parse_flow_mask_nlattrs(nla_mask, a, &mask_attrs, log);
1418 if (err)
1419 goto free_newmask;
1420
1421 /* Always match on tci. */
1422 SW_FLOW_KEY_PUT(match, eth.vlan.tci, htons(0xffff), true);
1423 SW_FLOW_KEY_PUT(match, eth.cvlan.tci, htons(0xffff), true);
1424
1425 err = parse_vlan_from_nlattrs(match, &mask_attrs, a, true, log);
1426 if (err)
1427 goto free_newmask;
1428
1429 err = ovs_key_from_nlattrs(net, match, mask_attrs, a, true,
1430 log);
1431 if (err)
1432 goto free_newmask;
1433 }
1434
1435 if (!match_validate(match, key_attrs, mask_attrs, log))
1436 err = -EINVAL;
1437
1438free_newmask:
1439 kfree(newmask);
1440 return err;
1441}
1442
1443static size_t get_ufid_len(const struct nlattr *attr, bool log)
1444{
1445 size_t len;
1446
1447 if (!attr)
1448 return 0;
1449
1450 len = nla_len(attr);
1451 if (len < 1 || len > MAX_UFID_LENGTH) {
1452 OVS_NLERR(log, "ufid size %u bytes exceeds the range (1, %d)",
1453 nla_len(attr), MAX_UFID_LENGTH);
1454 return 0;
1455 }
1456
1457 return len;
1458}
1459
1460/* Initializes 'flow->ufid', returning true if 'attr' contains a valid UFID,
1461 * or false otherwise.
1462 */
1463bool ovs_nla_get_ufid(struct sw_flow_id *sfid, const struct nlattr *attr,
1464 bool log)
1465{
1466 sfid->ufid_len = get_ufid_len(attr, log);
1467 if (sfid->ufid_len)
1468 memcpy(sfid->ufid, nla_data(attr), sfid->ufid_len);
1469
1470 return sfid->ufid_len;
1471}
1472
1473int ovs_nla_get_identifier(struct sw_flow_id *sfid, const struct nlattr *ufid,
1474 const struct sw_flow_key *key, bool log)
1475{
1476 struct sw_flow_key *new_key;
1477
1478 if (ovs_nla_get_ufid(sfid, ufid, log))
1479 return 0;
1480
1481 /* If UFID was not provided, use unmasked key. */
1482 new_key = kmalloc(sizeof(*new_key), GFP_KERNEL);
1483 if (!new_key)
1484 return -ENOMEM;
1485 memcpy(new_key, key, sizeof(*key));
1486 sfid->unmasked_key = new_key;
1487
1488 return 0;
1489}
1490
1491u32 ovs_nla_get_ufid_flags(const struct nlattr *attr)
1492{
1493 return attr ? nla_get_u32(attr) : 0;
1494}
1495
1496/**
1497 * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key.
1498 * @key: Receives extracted in_port, priority, tun_key and skb_mark.
1499 * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
1500 * sequence.
1501 * @log: Boolean to allow kernel error logging. Normally true, but when
1502 * probing for feature compatibility this should be passed in as false to
1503 * suppress unnecessary error logging.
1504 *
1505 * This parses a series of Netlink attributes that form a flow key, which must
1506 * take the same form accepted by flow_from_nlattrs(), but only enough of it to
1507 * get the metadata, that is, the parts of the flow key that cannot be
1508 * extracted from the packet itself.
1509 */
1510
1511int ovs_nla_get_flow_metadata(struct net *net, const struct nlattr *attr,
1512 struct sw_flow_key *key,
1513 bool log)
1514{
1515 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
1516 struct sw_flow_match match;
1517 u64 attrs = 0;
1518 int err;
1519
1520 err = parse_flow_nlattrs(attr, a, &attrs, log);
1521 if (err)
1522 return -EINVAL;
1523
1524 memset(&match, 0, sizeof(match));
1525 match.key = key;
1526
1527 memset(&key->ct, 0, sizeof(key->ct));
1528 key->phy.in_port = DP_MAX_PORTS;
1529
1530 return metadata_from_nlattrs(net, &match, &attrs, a, false, log);
1531}
1532
1533static int ovs_nla_put_vlan(struct sk_buff *skb, const struct vlan_head *vh,
1534 bool is_mask)
1535{
1536 __be16 eth_type = !is_mask ? vh->tpid : htons(0xffff);
1537
1538 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) ||
1539 nla_put_be16(skb, OVS_KEY_ATTR_VLAN, vh->tci))
1540 return -EMSGSIZE;
1541 return 0;
1542}
1543
1544static int __ovs_nla_put_key(const struct sw_flow_key *swkey,
1545 const struct sw_flow_key *output, bool is_mask,
1546 struct sk_buff *skb)
1547{
1548 struct ovs_key_ethernet *eth_key;
1549 struct nlattr *nla;
1550 struct nlattr *encap = NULL;
1551 struct nlattr *in_encap = NULL;
1552
1553 if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id))
1554 goto nla_put_failure;
1555
1556 if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash))
1557 goto nla_put_failure;
1558
1559 if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority))
1560 goto nla_put_failure;
1561
1562 if ((swkey->tun_proto || is_mask)) {
1563 const void *opts = NULL;
1564
1565 if (output->tun_key.tun_flags & TUNNEL_OPTIONS_PRESENT)
1566 opts = TUN_METADATA_OPTS(output, swkey->tun_opts_len);
1567
1568 if (ip_tun_to_nlattr(skb, &output->tun_key, opts,
1569 swkey->tun_opts_len, swkey->tun_proto))
1570 goto nla_put_failure;
1571 }
1572
1573 if (swkey->phy.in_port == DP_MAX_PORTS) {
1574 if (is_mask && (output->phy.in_port == 0xffff))
1575 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff))
1576 goto nla_put_failure;
1577 } else {
1578 u16 upper_u16;
1579 upper_u16 = !is_mask ? 0 : 0xffff;
1580
1581 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT,
1582 (upper_u16 << 16) | output->phy.in_port))
1583 goto nla_put_failure;
1584 }
1585
1586 if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark))
1587 goto nla_put_failure;
1588
1589 if (ovs_ct_put_key(output, skb))
1590 goto nla_put_failure;
1591
1592 if (ovs_key_mac_proto(swkey) == MAC_PROTO_ETHERNET) {
1593 nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key));
1594 if (!nla)
1595 goto nla_put_failure;
1596
1597 eth_key = nla_data(nla);
1598 ether_addr_copy(eth_key->eth_src, output->eth.src);
1599 ether_addr_copy(eth_key->eth_dst, output->eth.dst);
1600
1601 if (swkey->eth.vlan.tci || eth_type_vlan(swkey->eth.type)) {
1602 if (ovs_nla_put_vlan(skb, &output->eth.vlan, is_mask))
1603 goto nla_put_failure;
1604 encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
1605 if (!swkey->eth.vlan.tci)
1606 goto unencap;
1607
1608 if (swkey->eth.cvlan.tci || eth_type_vlan(swkey->eth.type)) {
1609 if (ovs_nla_put_vlan(skb, &output->eth.cvlan, is_mask))
1610 goto nla_put_failure;
1611 in_encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
1612 if (!swkey->eth.cvlan.tci)
1613 goto unencap;
1614 }
1615 }
1616
1617 if (swkey->eth.type == htons(ETH_P_802_2)) {
1618 /*
1619 * Ethertype 802.2 is represented in the netlink with omitted
1620 * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and
1621 * 0xffff in the mask attribute. Ethertype can also
1622 * be wildcarded.
1623 */
1624 if (is_mask && output->eth.type)
1625 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE,
1626 output->eth.type))
1627 goto nla_put_failure;
1628 goto unencap;
1629 }
1630 }
1631
1632 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type))
1633 goto nla_put_failure;
1634
1635 if (eth_type_vlan(swkey->eth.type)) {
1636 /* There are 3 VLAN tags, we don't know anything about the rest
1637 * of the packet, so truncate here.
1638 */
1639 WARN_ON_ONCE(!(encap && in_encap));
1640 goto unencap;
1641 }
1642
1643 if (swkey->eth.type == htons(ETH_P_IP)) {
1644 struct ovs_key_ipv4 *ipv4_key;
1645
1646 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key));
1647 if (!nla)
1648 goto nla_put_failure;
1649 ipv4_key = nla_data(nla);
1650 ipv4_key->ipv4_src = output->ipv4.addr.src;
1651 ipv4_key->ipv4_dst = output->ipv4.addr.dst;
1652 ipv4_key->ipv4_proto = output->ip.proto;
1653 ipv4_key->ipv4_tos = output->ip.tos;
1654 ipv4_key->ipv4_ttl = output->ip.ttl;
1655 ipv4_key->ipv4_frag = output->ip.frag;
1656 } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
1657 struct ovs_key_ipv6 *ipv6_key;
1658
1659 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key));
1660 if (!nla)
1661 goto nla_put_failure;
1662 ipv6_key = nla_data(nla);
1663 memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src,
1664 sizeof(ipv6_key->ipv6_src));
1665 memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst,
1666 sizeof(ipv6_key->ipv6_dst));
1667 ipv6_key->ipv6_label = output->ipv6.label;
1668 ipv6_key->ipv6_proto = output->ip.proto;
1669 ipv6_key->ipv6_tclass = output->ip.tos;
1670 ipv6_key->ipv6_hlimit = output->ip.ttl;
1671 ipv6_key->ipv6_frag = output->ip.frag;
1672 } else if (swkey->eth.type == htons(ETH_P_ARP) ||
1673 swkey->eth.type == htons(ETH_P_RARP)) {
1674 struct ovs_key_arp *arp_key;
1675
1676 nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key));
1677 if (!nla)
1678 goto nla_put_failure;
1679 arp_key = nla_data(nla);
1680 memset(arp_key, 0, sizeof(struct ovs_key_arp));
1681 arp_key->arp_sip = output->ipv4.addr.src;
1682 arp_key->arp_tip = output->ipv4.addr.dst;
1683 arp_key->arp_op = htons(output->ip.proto);
1684 ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha);
1685 ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha);
1686 } else if (eth_p_mpls(swkey->eth.type)) {
1687 struct ovs_key_mpls *mpls_key;
1688
1689 nla = nla_reserve(skb, OVS_KEY_ATTR_MPLS, sizeof(*mpls_key));
1690 if (!nla)
1691 goto nla_put_failure;
1692 mpls_key = nla_data(nla);
1693 mpls_key->mpls_lse = output->mpls.top_lse;
1694 }
1695
1696 if ((swkey->eth.type == htons(ETH_P_IP) ||
1697 swkey->eth.type == htons(ETH_P_IPV6)) &&
1698 swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
1699
1700 if (swkey->ip.proto == IPPROTO_TCP) {
1701 struct ovs_key_tcp *tcp_key;
1702
1703 nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key));
1704 if (!nla)
1705 goto nla_put_failure;
1706 tcp_key = nla_data(nla);
1707 tcp_key->tcp_src = output->tp.src;
1708 tcp_key->tcp_dst = output->tp.dst;
1709 if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS,
1710 output->tp.flags))
1711 goto nla_put_failure;
1712 } else if (swkey->ip.proto == IPPROTO_UDP) {
1713 struct ovs_key_udp *udp_key;
1714
1715 nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key));
1716 if (!nla)
1717 goto nla_put_failure;
1718 udp_key = nla_data(nla);
1719 udp_key->udp_src = output->tp.src;
1720 udp_key->udp_dst = output->tp.dst;
1721 } else if (swkey->ip.proto == IPPROTO_SCTP) {
1722 struct ovs_key_sctp *sctp_key;
1723
1724 nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key));
1725 if (!nla)
1726 goto nla_put_failure;
1727 sctp_key = nla_data(nla);
1728 sctp_key->sctp_src = output->tp.src;
1729 sctp_key->sctp_dst = output->tp.dst;
1730 } else if (swkey->eth.type == htons(ETH_P_IP) &&
1731 swkey->ip.proto == IPPROTO_ICMP) {
1732 struct ovs_key_icmp *icmp_key;
1733
1734 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key));
1735 if (!nla)
1736 goto nla_put_failure;
1737 icmp_key = nla_data(nla);
1738 icmp_key->icmp_type = ntohs(output->tp.src);
1739 icmp_key->icmp_code = ntohs(output->tp.dst);
1740 } else if (swkey->eth.type == htons(ETH_P_IPV6) &&
1741 swkey->ip.proto == IPPROTO_ICMPV6) {
1742 struct ovs_key_icmpv6 *icmpv6_key;
1743
1744 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6,
1745 sizeof(*icmpv6_key));
1746 if (!nla)
1747 goto nla_put_failure;
1748 icmpv6_key = nla_data(nla);
1749 icmpv6_key->icmpv6_type = ntohs(output->tp.src);
1750 icmpv6_key->icmpv6_code = ntohs(output->tp.dst);
1751
1752 if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION ||
1753 icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) {
1754 struct ovs_key_nd *nd_key;
1755
1756 nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key));
1757 if (!nla)
1758 goto nla_put_failure;
1759 nd_key = nla_data(nla);
1760 memcpy(nd_key->nd_target, &output->ipv6.nd.target,
1761 sizeof(nd_key->nd_target));
1762 ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll);
1763 ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll);
1764 }
1765 }
1766 }
1767
1768unencap:
1769 if (in_encap)
1770 nla_nest_end(skb, in_encap);
1771 if (encap)
1772 nla_nest_end(skb, encap);
1773
1774 return 0;
1775
1776nla_put_failure:
1777 return -EMSGSIZE;
1778}
1779
1780int ovs_nla_put_key(const struct sw_flow_key *swkey,
1781 const struct sw_flow_key *output, int attr, bool is_mask,
1782 struct sk_buff *skb)
1783{
1784 int err;
1785 struct nlattr *nla;
1786
1787 nla = nla_nest_start(skb, attr);
1788 if (!nla)
1789 return -EMSGSIZE;
1790 err = __ovs_nla_put_key(swkey, output, is_mask, skb);
1791 if (err)
1792 return err;
1793 nla_nest_end(skb, nla);
1794
1795 return 0;
1796}
1797
1798/* Called with ovs_mutex or RCU read lock. */
1799int ovs_nla_put_identifier(const struct sw_flow *flow, struct sk_buff *skb)
1800{
1801 if (ovs_identifier_is_ufid(&flow->id))
1802 return nla_put(skb, OVS_FLOW_ATTR_UFID, flow->id.ufid_len,
1803 flow->id.ufid);
1804
1805 return ovs_nla_put_key(flow->id.unmasked_key, flow->id.unmasked_key,
1806 OVS_FLOW_ATTR_KEY, false, skb);
1807}
1808
1809/* Called with ovs_mutex or RCU read lock. */
1810int ovs_nla_put_masked_key(const struct sw_flow *flow, struct sk_buff *skb)
1811{
1812 return ovs_nla_put_key(&flow->key, &flow->key,
1813 OVS_FLOW_ATTR_KEY, false, skb);
1814}
1815
1816/* Called with ovs_mutex or RCU read lock. */
1817int ovs_nla_put_mask(const struct sw_flow *flow, struct sk_buff *skb)
1818{
1819 return ovs_nla_put_key(&flow->key, &flow->mask->key,
1820 OVS_FLOW_ATTR_MASK, true, skb);
1821}
1822
1823#define MAX_ACTIONS_BUFSIZE (32 * 1024)
1824
1825static struct sw_flow_actions *nla_alloc_flow_actions(int size, bool log)
1826{
1827 struct sw_flow_actions *sfa;
1828
1829 if (size > MAX_ACTIONS_BUFSIZE) {
1830 OVS_NLERR(log, "Flow action size %u bytes exceeds max", size);
1831 return ERR_PTR(-EINVAL);
1832 }
1833
1834 sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL);
1835 if (!sfa)
1836 return ERR_PTR(-ENOMEM);
1837
1838 sfa->actions_len = 0;
1839 return sfa;
1840}
1841
1842static void ovs_nla_free_set_action(const struct nlattr *a)
1843{
1844 const struct nlattr *ovs_key = nla_data(a);
1845 struct ovs_tunnel_info *ovs_tun;
1846
1847 switch (nla_type(ovs_key)) {
1848 case OVS_KEY_ATTR_TUNNEL_INFO:
1849 ovs_tun = nla_data(ovs_key);
1850 dst_release((struct dst_entry *)ovs_tun->tun_dst);
1851 break;
1852 }
1853}
1854
1855void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts)
1856{
1857 const struct nlattr *a;
1858 int rem;
1859
1860 if (!sf_acts)
1861 return;
1862
1863 nla_for_each_attr(a, sf_acts->actions, sf_acts->actions_len, rem) {
1864 switch (nla_type(a)) {
1865 case OVS_ACTION_ATTR_SET:
1866 ovs_nla_free_set_action(a);
1867 break;
1868 case OVS_ACTION_ATTR_CT:
1869 ovs_ct_free_action(a);
1870 break;
1871 }
1872 }
1873
1874 kfree(sf_acts);
1875}
1876
1877static void __ovs_nla_free_flow_actions(struct rcu_head *head)
1878{
1879 ovs_nla_free_flow_actions(container_of(head, struct sw_flow_actions, rcu));
1880}
1881
1882/* Schedules 'sf_acts' to be freed after the next RCU grace period.
1883 * The caller must hold rcu_read_lock for this to be sensible. */
1884void ovs_nla_free_flow_actions_rcu(struct sw_flow_actions *sf_acts)
1885{
1886 call_rcu(&sf_acts->rcu, __ovs_nla_free_flow_actions);
1887}
1888
1889static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa,
1890 int attr_len, bool log)
1891{
1892
1893 struct sw_flow_actions *acts;
1894 int new_acts_size;
1895 int req_size = NLA_ALIGN(attr_len);
1896 int next_offset = offsetof(struct sw_flow_actions, actions) +
1897 (*sfa)->actions_len;
1898
1899 if (req_size <= (ksize(*sfa) - next_offset))
1900 goto out;
1901
1902 new_acts_size = ksize(*sfa) * 2;
1903
1904 if (new_acts_size > MAX_ACTIONS_BUFSIZE) {
1905 if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size)
1906 return ERR_PTR(-EMSGSIZE);
1907 new_acts_size = MAX_ACTIONS_BUFSIZE;
1908 }
1909
1910 acts = nla_alloc_flow_actions(new_acts_size, log);
1911 if (IS_ERR(acts))
1912 return (void *)acts;
1913
1914 memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len);
1915 acts->actions_len = (*sfa)->actions_len;
1916 acts->orig_len = (*sfa)->orig_len;
1917 kfree(*sfa);
1918 *sfa = acts;
1919
1920out:
1921 (*sfa)->actions_len += req_size;
1922 return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset);
1923}
1924
1925static struct nlattr *__add_action(struct sw_flow_actions **sfa,
1926 int attrtype, void *data, int len, bool log)
1927{
1928 struct nlattr *a;
1929
1930 a = reserve_sfa_size(sfa, nla_attr_size(len), log);
1931 if (IS_ERR(a))
1932 return a;
1933
1934 a->nla_type = attrtype;
1935 a->nla_len = nla_attr_size(len);
1936
1937 if (data)
1938 memcpy(nla_data(a), data, len);
1939 memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len));
1940
1941 return a;
1942}
1943
1944int ovs_nla_add_action(struct sw_flow_actions **sfa, int attrtype, void *data,
1945 int len, bool log)
1946{
1947 struct nlattr *a;
1948
1949 a = __add_action(sfa, attrtype, data, len, log);
1950
1951 return PTR_ERR_OR_ZERO(a);
1952}
1953
1954static inline int add_nested_action_start(struct sw_flow_actions **sfa,
1955 int attrtype, bool log)
1956{
1957 int used = (*sfa)->actions_len;
1958 int err;
1959
1960 err = ovs_nla_add_action(sfa, attrtype, NULL, 0, log);
1961 if (err)
1962 return err;
1963
1964 return used;
1965}
1966
1967static inline void add_nested_action_end(struct sw_flow_actions *sfa,
1968 int st_offset)
1969{
1970 struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions +
1971 st_offset);
1972
1973 a->nla_len = sfa->actions_len - st_offset;
1974}
1975
1976static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
1977 const struct sw_flow_key *key,
1978 int depth, struct sw_flow_actions **sfa,
1979 __be16 eth_type, __be16 vlan_tci, bool log);
1980
1981static int validate_and_copy_sample(struct net *net, const struct nlattr *attr,
1982 const struct sw_flow_key *key, int depth,
1983 struct sw_flow_actions **sfa,
1984 __be16 eth_type, __be16 vlan_tci, bool log)
1985{
1986 const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];
1987 const struct nlattr *probability, *actions;
1988 const struct nlattr *a;
1989 int rem, start, err, st_acts;
1990
1991 memset(attrs, 0, sizeof(attrs));
1992 nla_for_each_nested(a, attr, rem) {
1993 int type = nla_type(a);
1994 if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type])
1995 return -EINVAL;
1996 attrs[type] = a;
1997 }
1998 if (rem)
1999 return -EINVAL;
2000
2001 probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY];
2002 if (!probability || nla_len(probability) != sizeof(u32))
2003 return -EINVAL;
2004
2005 actions = attrs[OVS_SAMPLE_ATTR_ACTIONS];
2006 if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN))
2007 return -EINVAL;
2008
2009 /* validation done, copy sample action. */
2010 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE, log);
2011 if (start < 0)
2012 return start;
2013 err = ovs_nla_add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY,
2014 nla_data(probability), sizeof(u32), log);
2015 if (err)
2016 return err;
2017 st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS, log);
2018 if (st_acts < 0)
2019 return st_acts;
2020
2021 err = __ovs_nla_copy_actions(net, actions, key, depth + 1, sfa,
2022 eth_type, vlan_tci, log);
2023 if (err)
2024 return err;
2025
2026 add_nested_action_end(*sfa, st_acts);
2027 add_nested_action_end(*sfa, start);
2028
2029 return 0;
2030}
2031
2032void ovs_match_init(struct sw_flow_match *match,
2033 struct sw_flow_key *key,
2034 bool reset_key,
2035 struct sw_flow_mask *mask)
2036{
2037 memset(match, 0, sizeof(*match));
2038 match->key = key;
2039 match->mask = mask;
2040
2041 if (reset_key)
2042 memset(key, 0, sizeof(*key));
2043
2044 if (mask) {
2045 memset(&mask->key, 0, sizeof(mask->key));
2046 mask->range.start = mask->range.end = 0;
2047 }
2048}
2049
2050static int validate_geneve_opts(struct sw_flow_key *key)
2051{
2052 struct geneve_opt *option;
2053 int opts_len = key->tun_opts_len;
2054 bool crit_opt = false;
2055
2056 option = (struct geneve_opt *)TUN_METADATA_OPTS(key, key->tun_opts_len);
2057 while (opts_len > 0) {
2058 int len;
2059
2060 if (opts_len < sizeof(*option))
2061 return -EINVAL;
2062
2063 len = sizeof(*option) + option->length * 4;
2064 if (len > opts_len)
2065 return -EINVAL;
2066
2067 crit_opt |= !!(option->type & GENEVE_CRIT_OPT_TYPE);
2068
2069 option = (struct geneve_opt *)((u8 *)option + len);
2070 opts_len -= len;
2071 };
2072
2073 key->tun_key.tun_flags |= crit_opt ? TUNNEL_CRIT_OPT : 0;
2074
2075 return 0;
2076}
2077
2078static int validate_and_copy_set_tun(const struct nlattr *attr,
2079 struct sw_flow_actions **sfa, bool log)
2080{
2081 struct sw_flow_match match;
2082 struct sw_flow_key key;
2083 struct metadata_dst *tun_dst;
2084 struct ip_tunnel_info *tun_info;
2085 struct ovs_tunnel_info *ovs_tun;
2086 struct nlattr *a;
2087 int err = 0, start, opts_type;
2088
2089 ovs_match_init(&match, &key, true, NULL);
2090 opts_type = ip_tun_from_nlattr(nla_data(attr), &match, false, log);
2091 if (opts_type < 0)
2092 return opts_type;
2093
2094 if (key.tun_opts_len) {
2095 switch (opts_type) {
2096 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
2097 err = validate_geneve_opts(&key);
2098 if (err < 0)
2099 return err;
2100 break;
2101 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
2102 break;
2103 }
2104 };
2105
2106 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET, log);
2107 if (start < 0)
2108 return start;
2109
2110 tun_dst = metadata_dst_alloc(key.tun_opts_len, GFP_KERNEL);
2111 if (!tun_dst)
2112 return -ENOMEM;
2113
2114 err = dst_cache_init(&tun_dst->u.tun_info.dst_cache, GFP_KERNEL);
2115 if (err) {
2116 dst_release((struct dst_entry *)tun_dst);
2117 return err;
2118 }
2119
2120 a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL,
2121 sizeof(*ovs_tun), log);
2122 if (IS_ERR(a)) {
2123 dst_release((struct dst_entry *)tun_dst);
2124 return PTR_ERR(a);
2125 }
2126
2127 ovs_tun = nla_data(a);
2128 ovs_tun->tun_dst = tun_dst;
2129
2130 tun_info = &tun_dst->u.tun_info;
2131 tun_info->mode = IP_TUNNEL_INFO_TX;
2132 if (key.tun_proto == AF_INET6)
2133 tun_info->mode |= IP_TUNNEL_INFO_IPV6;
2134 tun_info->key = key.tun_key;
2135
2136 /* We need to store the options in the action itself since
2137 * everything else will go away after flow setup. We can append
2138 * it to tun_info and then point there.
2139 */
2140 ip_tunnel_info_opts_set(tun_info,
2141 TUN_METADATA_OPTS(&key, key.tun_opts_len),
2142 key.tun_opts_len);
2143 add_nested_action_end(*sfa, start);
2144
2145 return err;
2146}
2147
2148/* Return false if there are any non-masked bits set.
2149 * Mask follows data immediately, before any netlink padding.
2150 */
2151static bool validate_masked(u8 *data, int len)
2152{
2153 u8 *mask = data + len;
2154
2155 while (len--)
2156 if (*data++ & ~*mask++)
2157 return false;
2158
2159 return true;
2160}
2161
2162static int validate_set(const struct nlattr *a,
2163 const struct sw_flow_key *flow_key,
2164 struct sw_flow_actions **sfa, bool *skip_copy,
2165 u8 mac_proto, __be16 eth_type, bool masked, bool log)
2166{
2167 const struct nlattr *ovs_key = nla_data(a);
2168 int key_type = nla_type(ovs_key);
2169 size_t key_len;
2170
2171 /* There can be only one key in a action */
2172 if (nla_total_size(nla_len(ovs_key)) != nla_len(a))
2173 return -EINVAL;
2174
2175 key_len = nla_len(ovs_key);
2176 if (masked)
2177 key_len /= 2;
2178
2179 if (key_type > OVS_KEY_ATTR_MAX ||
2180 !check_attr_len(key_len, ovs_key_lens[key_type].len))
2181 return -EINVAL;
2182
2183 if (masked && !validate_masked(nla_data(ovs_key), key_len))
2184 return -EINVAL;
2185
2186 switch (key_type) {
2187 const struct ovs_key_ipv4 *ipv4_key;
2188 const struct ovs_key_ipv6 *ipv6_key;
2189 int err;
2190
2191 case OVS_KEY_ATTR_PRIORITY:
2192 case OVS_KEY_ATTR_SKB_MARK:
2193 case OVS_KEY_ATTR_CT_MARK:
2194 case OVS_KEY_ATTR_CT_LABELS:
2195 break;
2196
2197 case OVS_KEY_ATTR_ETHERNET:
2198 if (mac_proto != MAC_PROTO_ETHERNET)
2199 return -EINVAL;
2200 break;
2201
2202 case OVS_KEY_ATTR_TUNNEL:
2203 if (masked)
2204 return -EINVAL; /* Masked tunnel set not supported. */
2205
2206 *skip_copy = true;
2207 err = validate_and_copy_set_tun(a, sfa, log);
2208 if (err)
2209 return err;
2210 break;
2211
2212 case OVS_KEY_ATTR_IPV4:
2213 if (eth_type != htons(ETH_P_IP))
2214 return -EINVAL;
2215
2216 ipv4_key = nla_data(ovs_key);
2217
2218 if (masked) {
2219 const struct ovs_key_ipv4 *mask = ipv4_key + 1;
2220
2221 /* Non-writeable fields. */
2222 if (mask->ipv4_proto || mask->ipv4_frag)
2223 return -EINVAL;
2224 } else {
2225 if (ipv4_key->ipv4_proto != flow_key->ip.proto)
2226 return -EINVAL;
2227
2228 if (ipv4_key->ipv4_frag != flow_key->ip.frag)
2229 return -EINVAL;
2230 }
2231 break;
2232
2233 case OVS_KEY_ATTR_IPV6:
2234 if (eth_type != htons(ETH_P_IPV6))
2235 return -EINVAL;
2236
2237 ipv6_key = nla_data(ovs_key);
2238
2239 if (masked) {
2240 const struct ovs_key_ipv6 *mask = ipv6_key + 1;
2241
2242 /* Non-writeable fields. */
2243 if (mask->ipv6_proto || mask->ipv6_frag)
2244 return -EINVAL;
2245
2246 /* Invalid bits in the flow label mask? */
2247 if (ntohl(mask->ipv6_label) & 0xFFF00000)
2248 return -EINVAL;
2249 } else {
2250 if (ipv6_key->ipv6_proto != flow_key->ip.proto)
2251 return -EINVAL;
2252
2253 if (ipv6_key->ipv6_frag != flow_key->ip.frag)
2254 return -EINVAL;
2255 }
2256 if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000)
2257 return -EINVAL;
2258
2259 break;
2260
2261 case OVS_KEY_ATTR_TCP:
2262 if ((eth_type != htons(ETH_P_IP) &&
2263 eth_type != htons(ETH_P_IPV6)) ||
2264 flow_key->ip.proto != IPPROTO_TCP)
2265 return -EINVAL;
2266
2267 break;
2268
2269 case OVS_KEY_ATTR_UDP:
2270 if ((eth_type != htons(ETH_P_IP) &&
2271 eth_type != htons(ETH_P_IPV6)) ||
2272 flow_key->ip.proto != IPPROTO_UDP)
2273 return -EINVAL;
2274
2275 break;
2276
2277 case OVS_KEY_ATTR_MPLS:
2278 if (!eth_p_mpls(eth_type))
2279 return -EINVAL;
2280 break;
2281
2282 case OVS_KEY_ATTR_SCTP:
2283 if ((eth_type != htons(ETH_P_IP) &&
2284 eth_type != htons(ETH_P_IPV6)) ||
2285 flow_key->ip.proto != IPPROTO_SCTP)
2286 return -EINVAL;
2287
2288 break;
2289
2290 default:
2291 return -EINVAL;
2292 }
2293
2294 /* Convert non-masked non-tunnel set actions to masked set actions. */
2295 if (!masked && key_type != OVS_KEY_ATTR_TUNNEL) {
2296 int start, len = key_len * 2;
2297 struct nlattr *at;
2298
2299 *skip_copy = true;
2300
2301 start = add_nested_action_start(sfa,
2302 OVS_ACTION_ATTR_SET_TO_MASKED,
2303 log);
2304 if (start < 0)
2305 return start;
2306
2307 at = __add_action(sfa, key_type, NULL, len, log);
2308 if (IS_ERR(at))
2309 return PTR_ERR(at);
2310
2311 memcpy(nla_data(at), nla_data(ovs_key), key_len); /* Key. */
2312 memset(nla_data(at) + key_len, 0xff, key_len); /* Mask. */
2313 /* Clear non-writeable bits from otherwise writeable fields. */
2314 if (key_type == OVS_KEY_ATTR_IPV6) {
2315 struct ovs_key_ipv6 *mask = nla_data(at) + key_len;
2316
2317 mask->ipv6_label &= htonl(0x000FFFFF);
2318 }
2319 add_nested_action_end(*sfa, start);
2320 }
2321
2322 return 0;
2323}
2324
2325static int validate_userspace(const struct nlattr *attr)
2326{
2327 static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = {
2328 [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 },
2329 [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC },
2330 [OVS_USERSPACE_ATTR_EGRESS_TUN_PORT] = {.type = NLA_U32 },
2331 };
2332 struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];
2333 int error;
2334
2335 error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX,
2336 attr, userspace_policy);
2337 if (error)
2338 return error;
2339
2340 if (!a[OVS_USERSPACE_ATTR_PID] ||
2341 !nla_get_u32(a[OVS_USERSPACE_ATTR_PID]))
2342 return -EINVAL;
2343
2344 return 0;
2345}
2346
2347static int copy_action(const struct nlattr *from,
2348 struct sw_flow_actions **sfa, bool log)
2349{
2350 int totlen = NLA_ALIGN(from->nla_len);
2351 struct nlattr *to;
2352
2353 to = reserve_sfa_size(sfa, from->nla_len, log);
2354 if (IS_ERR(to))
2355 return PTR_ERR(to);
2356
2357 memcpy(to, from, totlen);
2358 return 0;
2359}
2360
2361static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
2362 const struct sw_flow_key *key,
2363 int depth, struct sw_flow_actions **sfa,
2364 __be16 eth_type, __be16 vlan_tci, bool log)
2365{
2366 u8 mac_proto = ovs_key_mac_proto(key);
2367 const struct nlattr *a;
2368 int rem, err;
2369
2370 if (depth >= SAMPLE_ACTION_DEPTH)
2371 return -EOVERFLOW;
2372
2373 nla_for_each_nested(a, attr, rem) {
2374 /* Expected argument lengths, (u32)-1 for variable length. */
2375 static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {
2376 [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32),
2377 [OVS_ACTION_ATTR_RECIRC] = sizeof(u32),
2378 [OVS_ACTION_ATTR_USERSPACE] = (u32)-1,
2379 [OVS_ACTION_ATTR_PUSH_MPLS] = sizeof(struct ovs_action_push_mpls),
2380 [OVS_ACTION_ATTR_POP_MPLS] = sizeof(__be16),
2381 [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan),
2382 [OVS_ACTION_ATTR_POP_VLAN] = 0,
2383 [OVS_ACTION_ATTR_SET] = (u32)-1,
2384 [OVS_ACTION_ATTR_SET_MASKED] = (u32)-1,
2385 [OVS_ACTION_ATTR_SAMPLE] = (u32)-1,
2386 [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash),
2387 [OVS_ACTION_ATTR_CT] = (u32)-1,
2388 [OVS_ACTION_ATTR_TRUNC] = sizeof(struct ovs_action_trunc),
2389 [OVS_ACTION_ATTR_PUSH_ETH] = sizeof(struct ovs_action_push_eth),
2390 [OVS_ACTION_ATTR_POP_ETH] = 0,
2391 };
2392 const struct ovs_action_push_vlan *vlan;
2393 int type = nla_type(a);
2394 bool skip_copy;
2395
2396 if (type > OVS_ACTION_ATTR_MAX ||
2397 (action_lens[type] != nla_len(a) &&
2398 action_lens[type] != (u32)-1))
2399 return -EINVAL;
2400
2401 skip_copy = false;
2402 switch (type) {
2403 case OVS_ACTION_ATTR_UNSPEC:
2404 return -EINVAL;
2405
2406 case OVS_ACTION_ATTR_USERSPACE:
2407 err = validate_userspace(a);
2408 if (err)
2409 return err;
2410 break;
2411
2412 case OVS_ACTION_ATTR_OUTPUT:
2413 if (nla_get_u32(a) >= DP_MAX_PORTS)
2414 return -EINVAL;
2415 break;
2416
2417 case OVS_ACTION_ATTR_TRUNC: {
2418 const struct ovs_action_trunc *trunc = nla_data(a);
2419
2420 if (trunc->max_len < ETH_HLEN)
2421 return -EINVAL;
2422 break;
2423 }
2424
2425 case OVS_ACTION_ATTR_HASH: {
2426 const struct ovs_action_hash *act_hash = nla_data(a);
2427
2428 switch (act_hash->hash_alg) {
2429 case OVS_HASH_ALG_L4:
2430 break;
2431 default:
2432 return -EINVAL;
2433 }
2434
2435 break;
2436 }
2437
2438 case OVS_ACTION_ATTR_POP_VLAN:
2439 if (mac_proto != MAC_PROTO_ETHERNET)
2440 return -EINVAL;
2441 vlan_tci = htons(0);
2442 break;
2443
2444 case OVS_ACTION_ATTR_PUSH_VLAN:
2445 if (mac_proto != MAC_PROTO_ETHERNET)
2446 return -EINVAL;
2447 vlan = nla_data(a);
2448 if (!eth_type_vlan(vlan->vlan_tpid))
2449 return -EINVAL;
2450 if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT)))
2451 return -EINVAL;
2452 vlan_tci = vlan->vlan_tci;
2453 break;
2454
2455 case OVS_ACTION_ATTR_RECIRC:
2456 break;
2457
2458 case OVS_ACTION_ATTR_PUSH_MPLS: {
2459 const struct ovs_action_push_mpls *mpls = nla_data(a);
2460
2461 if (!eth_p_mpls(mpls->mpls_ethertype))
2462 return -EINVAL;
2463 /* Prohibit push MPLS other than to a white list
2464 * for packets that have a known tag order.
2465 */
2466 if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
2467 (eth_type != htons(ETH_P_IP) &&
2468 eth_type != htons(ETH_P_IPV6) &&
2469 eth_type != htons(ETH_P_ARP) &&
2470 eth_type != htons(ETH_P_RARP) &&
2471 !eth_p_mpls(eth_type)))
2472 return -EINVAL;
2473 eth_type = mpls->mpls_ethertype;
2474 break;
2475 }
2476
2477 case OVS_ACTION_ATTR_POP_MPLS:
2478 if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
2479 !eth_p_mpls(eth_type))
2480 return -EINVAL;
2481
2482 /* Disallow subsequent L2.5+ set and mpls_pop actions
2483 * as there is no check here to ensure that the new
2484 * eth_type is valid and thus set actions could
2485 * write off the end of the packet or otherwise
2486 * corrupt it.
2487 *
2488 * Support for these actions is planned using packet
2489 * recirculation.
2490 */
2491 eth_type = htons(0);
2492 break;
2493
2494 case OVS_ACTION_ATTR_SET:
2495 err = validate_set(a, key, sfa,
2496 &skip_copy, mac_proto, eth_type,
2497 false, log);
2498 if (err)
2499 return err;
2500 break;
2501
2502 case OVS_ACTION_ATTR_SET_MASKED:
2503 err = validate_set(a, key, sfa,
2504 &skip_copy, mac_proto, eth_type,
2505 true, log);
2506 if (err)
2507 return err;
2508 break;
2509
2510 case OVS_ACTION_ATTR_SAMPLE:
2511 err = validate_and_copy_sample(net, a, key, depth, sfa,
2512 eth_type, vlan_tci, log);
2513 if (err)
2514 return err;
2515 skip_copy = true;
2516 break;
2517
2518 case OVS_ACTION_ATTR_CT:
2519 err = ovs_ct_copy_action(net, a, key, sfa, log);
2520 if (err)
2521 return err;
2522 skip_copy = true;
2523 break;
2524
2525 case OVS_ACTION_ATTR_PUSH_ETH:
2526 /* Disallow pushing an Ethernet header if one
2527 * is already present */
2528 if (mac_proto != MAC_PROTO_NONE)
2529 return -EINVAL;
2530 mac_proto = MAC_PROTO_NONE;
2531 break;
2532
2533 case OVS_ACTION_ATTR_POP_ETH:
2534 if (mac_proto != MAC_PROTO_ETHERNET)
2535 return -EINVAL;
2536 if (vlan_tci & htons(VLAN_TAG_PRESENT))
2537 return -EINVAL;
2538 mac_proto = MAC_PROTO_ETHERNET;
2539 break;
2540
2541 default:
2542 OVS_NLERR(log, "Unknown Action type %d", type);
2543 return -EINVAL;
2544 }
2545 if (!skip_copy) {
2546 err = copy_action(a, sfa, log);
2547 if (err)
2548 return err;
2549 }
2550 }
2551
2552 if (rem > 0)
2553 return -EINVAL;
2554
2555 return 0;
2556}
2557
2558/* 'key' must be the masked key. */
2559int ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
2560 const struct sw_flow_key *key,
2561 struct sw_flow_actions **sfa, bool log)
2562{
2563 int err;
2564
2565 *sfa = nla_alloc_flow_actions(nla_len(attr), log);
2566 if (IS_ERR(*sfa))
2567 return PTR_ERR(*sfa);
2568
2569 (*sfa)->orig_len = nla_len(attr);
2570 err = __ovs_nla_copy_actions(net, attr, key, 0, sfa, key->eth.type,
2571 key->eth.vlan.tci, log);
2572 if (err)
2573 ovs_nla_free_flow_actions(*sfa);
2574
2575 return err;
2576}
2577
2578static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb)
2579{
2580 const struct nlattr *a;
2581 struct nlattr *start;
2582 int err = 0, rem;
2583
2584 start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE);
2585 if (!start)
2586 return -EMSGSIZE;
2587
2588 nla_for_each_nested(a, attr, rem) {
2589 int type = nla_type(a);
2590 struct nlattr *st_sample;
2591
2592 switch (type) {
2593 case OVS_SAMPLE_ATTR_PROBABILITY:
2594 if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY,
2595 sizeof(u32), nla_data(a)))
2596 return -EMSGSIZE;
2597 break;
2598 case OVS_SAMPLE_ATTR_ACTIONS:
2599 st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS);
2600 if (!st_sample)
2601 return -EMSGSIZE;
2602 err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb);
2603 if (err)
2604 return err;
2605 nla_nest_end(skb, st_sample);
2606 break;
2607 }
2608 }
2609
2610 nla_nest_end(skb, start);
2611 return err;
2612}
2613
2614static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb)
2615{
2616 const struct nlattr *ovs_key = nla_data(a);
2617 int key_type = nla_type(ovs_key);
2618 struct nlattr *start;
2619 int err;
2620
2621 switch (key_type) {
2622 case OVS_KEY_ATTR_TUNNEL_INFO: {
2623 struct ovs_tunnel_info *ovs_tun = nla_data(ovs_key);
2624 struct ip_tunnel_info *tun_info = &ovs_tun->tun_dst->u.tun_info;
2625
2626 start = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
2627 if (!start)
2628 return -EMSGSIZE;
2629
2630 err = ip_tun_to_nlattr(skb, &tun_info->key,
2631 ip_tunnel_info_opts(tun_info),
2632 tun_info->options_len,
2633 ip_tunnel_info_af(tun_info));
2634 if (err)
2635 return err;
2636 nla_nest_end(skb, start);
2637 break;
2638 }
2639 default:
2640 if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key))
2641 return -EMSGSIZE;
2642 break;
2643 }
2644
2645 return 0;
2646}
2647
2648static int masked_set_action_to_set_action_attr(const struct nlattr *a,
2649 struct sk_buff *skb)
2650{
2651 const struct nlattr *ovs_key = nla_data(a);
2652 struct nlattr *nla;
2653 size_t key_len = nla_len(ovs_key) / 2;
2654
2655 /* Revert the conversion we did from a non-masked set action to
2656 * masked set action.
2657 */
2658 nla = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
2659 if (!nla)
2660 return -EMSGSIZE;
2661
2662 if (nla_put(skb, nla_type(ovs_key), key_len, nla_data(ovs_key)))
2663 return -EMSGSIZE;
2664
2665 nla_nest_end(skb, nla);
2666 return 0;
2667}
2668
2669int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb)
2670{
2671 const struct nlattr *a;
2672 int rem, err;
2673
2674 nla_for_each_attr(a, attr, len, rem) {
2675 int type = nla_type(a);
2676
2677 switch (type) {
2678 case OVS_ACTION_ATTR_SET:
2679 err = set_action_to_attr(a, skb);
2680 if (err)
2681 return err;
2682 break;
2683
2684 case OVS_ACTION_ATTR_SET_TO_MASKED:
2685 err = masked_set_action_to_set_action_attr(a, skb);
2686 if (err)
2687 return err;
2688 break;
2689
2690 case OVS_ACTION_ATTR_SAMPLE:
2691 err = sample_action_to_attr(a, skb);
2692 if (err)
2693 return err;
2694 break;
2695
2696 case OVS_ACTION_ATTR_CT:
2697 err = ovs_ct_action_to_attr(nla_data(a), skb);
2698 if (err)
2699 return err;
2700 break;
2701
2702 default:
2703 if (nla_put(skb, type, nla_len(a), nla_data(a)))
2704 return -EMSGSIZE;
2705 break;
2706 }
2707 }
2708
2709 return 0;
2710}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2007-2017 Nicira, Inc.
4 */
5
6#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
7
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>
32#include <net/geneve.h>
33#include <net/ip.h>
34#include <net/ipv6.h>
35#include <net/ndisc.h>
36#include <net/mpls.h>
37#include <net/vxlan.h>
38#include <net/tun_proto.h>
39#include <net/erspan.h>
40
41#include "flow_netlink.h"
42
43struct ovs_len_tbl {
44 int len;
45 const struct ovs_len_tbl *next;
46};
47
48#define OVS_ATTR_NESTED -1
49#define OVS_ATTR_VARIABLE -2
50
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:
67 case OVS_ACTION_ATTR_CT_CLEAR:
68 case OVS_ACTION_ATTR_HASH:
69 case OVS_ACTION_ATTR_POP_ETH:
70 case OVS_ACTION_ATTR_POP_MPLS:
71 case OVS_ACTION_ATTR_POP_NSH:
72 case OVS_ACTION_ATTR_POP_VLAN:
73 case OVS_ACTION_ATTR_PUSH_ETH:
74 case OVS_ACTION_ATTR_PUSH_MPLS:
75 case OVS_ACTION_ATTR_PUSH_NSH:
76 case OVS_ACTION_ATTR_PUSH_VLAN:
77 case OVS_ACTION_ATTR_SAMPLE:
78 case OVS_ACTION_ATTR_SET:
79 case OVS_ACTION_ATTR_SET_MASKED:
80 case OVS_ACTION_ATTR_METER:
81 case OVS_ACTION_ATTR_CHECK_PKT_LEN:
82 case OVS_ACTION_ATTR_ADD_MPLS:
83 case OVS_ACTION_ATTR_DEC_TTL:
84 default:
85 return true;
86 }
87 }
88 return false;
89}
90
91static void update_range(struct sw_flow_match *match,
92 size_t offset, size_t size, bool is_mask)
93{
94 struct sw_flow_key_range *range;
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;
100 else
101 range = &match->mask->range;
102
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 { \
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 \
123 (match)->key->field = value; \
124 } while (0)
125
126#define SW_FLOW_KEY_MEMCPY_OFFSET(match, offset, value_p, len, is_mask) \
127 do { \
128 update_range(match, offset, len, is_mask); \
129 if (is_mask) \
130 memcpy((u8 *)&(match)->mask->key + offset, value_p, \
131 len); \
132 else \
133 memcpy((u8 *)(match)->key + offset, value_p, len); \
134 } while (0)
135
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
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 \
148 memset((u8 *)&(match)->key->field, value, \
149 sizeof((match)->key->field)); \
150 } while (0)
151
152static bool match_validate(const struct sw_flow_match *match,
153 u64 key_attrs, u64 mask_attrs, bool log)
154{
155 u64 key_expected = 0;
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)
161 | (1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4)
162 | (1 << OVS_KEY_ATTR_IPV6)
163 | (1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6)
164 | (1 << OVS_KEY_ATTR_TCP)
165 | (1 << OVS_KEY_ATTR_TCP_FLAGS)
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)
171 | (1 << OVS_KEY_ATTR_ND)
172 | (1 << OVS_KEY_ATTR_MPLS)
173 | (1 << OVS_KEY_ATTR_NSH));
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;
184 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
185 mask_allowed |= 1 << OVS_KEY_ATTR_ARP;
186 }
187
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
194 if (match->key->eth.type == htons(ETH_P_IP)) {
195 key_expected |= 1 << OVS_KEY_ATTR_IPV4;
196 if (match->mask && match->mask->key.eth.type == htons(0xffff)) {
197 mask_allowed |= 1 << OVS_KEY_ATTR_IPV4;
198 mask_allowed |= 1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4;
199 }
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;
216 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
217 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
218 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
219 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
220 }
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;
233 if (match->mask && match->mask->key.eth.type == htons(0xffff)) {
234 mask_allowed |= 1 << OVS_KEY_ATTR_IPV6;
235 mask_allowed |= 1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6;
236 }
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;
253 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
254 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
255 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
256 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
257 }
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
265 if (match->key->tp.src ==
266 htons(NDISC_NEIGHBOUR_SOLICITATION) ||
267 match->key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) {
268 key_expected |= 1 << OVS_KEY_ATTR_ND;
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);
275 if (match->mask && (match->mask->key.tp.src == htons(0xff)))
276 mask_allowed |= 1 << OVS_KEY_ATTR_ND;
277 }
278 }
279 }
280 }
281
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
290 if ((key_attrs & key_expected) != key_expected) {
291 /* Key attributes check failed. */
292 OVS_NLERR(log, "Missing key (keys=%llx, expected=%llx)",
293 (unsigned long long)key_attrs,
294 (unsigned long long)key_expected);
295 return false;
296 }
297
298 if ((mask_attrs & mask_allowed) != mask_attrs) {
299 /* Mask attributes check failed. */
300 OVS_NLERR(log, "Unexpected mask (mask=%llx, allowed=%llx)",
301 (unsigned long long)mask_attrs,
302 (unsigned long long)mask_allowed);
303 return false;
304 }
305
306 return true;
307}
308
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 */
314 return nla_total_size_64bit(8) /* OVS_TUNNEL_KEY_ATTR_ID */
315 + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_SRC */
316 + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_DST */
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 */
323 /* OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS and
324 * OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS is mutually exclusive with
325 * OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS and covered by it.
326 */
327 + nla_total_size(2) /* OVS_TUNNEL_KEY_ATTR_TP_SRC */
328 + nla_total_size(2); /* OVS_TUNNEL_KEY_ATTR_TP_DST */
329}
330
331static size_t ovs_nsh_key_attr_size(void)
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
344size_t ovs_key_attr_size(void)
345{
346 /* Whenever adding new OVS_KEY_ FIELDS, we should consider
347 * updating this function.
348 */
349 BUILD_BUG_ON(OVS_KEY_ATTR_TUNNEL_INFO != 29);
350
351 return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */
352 + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */
353 + ovs_tun_key_attr_size()
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 */
358 + nla_total_size(4) /* OVS_KEY_ATTR_CT_STATE */
359 + nla_total_size(2) /* OVS_KEY_ATTR_CT_ZONE */
360 + nla_total_size(4) /* OVS_KEY_ATTR_CT_MARK */
361 + nla_total_size(16) /* OVS_KEY_ATTR_CT_LABELS */
362 + nla_total_size(40) /* OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6 */
363 + nla_total_size(0) /* OVS_KEY_ATTR_NSH */
364 + ovs_nsh_key_attr_size()
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
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
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 },
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 },
393 [OVS_TUNNEL_KEY_ATTR_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
394 [OVS_TUNNEL_KEY_ATTR_IPV6_DST] = { .len = sizeof(struct in6_addr) },
395 [OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS] = { .len = OVS_ATTR_VARIABLE },
396 [OVS_TUNNEL_KEY_ATTR_IPV4_INFO_BRIDGE] = { .len = 0 },
397};
398
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
406/* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */
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, },
429 [OVS_KEY_ATTR_MPLS] = { .len = OVS_ATTR_VARIABLE },
430 [OVS_KEY_ATTR_CT_STATE] = { .len = sizeof(u32) },
431 [OVS_KEY_ATTR_CT_ZONE] = { .len = sizeof(u16) },
432 [OVS_KEY_ATTR_CT_MARK] = { .len = sizeof(u32) },
433 [OVS_KEY_ATTR_CT_LABELS] = { .len = sizeof(struct ovs_key_ct_labels) },
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) },
438 [OVS_KEY_ATTR_NSH] = { .len = OVS_ATTR_NESTED,
439 .next = ovs_nsh_key_attr_lens, },
440};
441
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
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[],
465 u64 *attrsp, bool log, bool nz)
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) {
477 OVS_NLERR(log, "Key type %d is out of range max %d",
478 type, OVS_KEY_ATTR_MAX);
479 return -EINVAL;
480 }
481
482 if (attrs & (1 << type)) {
483 OVS_NLERR(log, "Duplicate key (type %d).", type);
484 return -EINVAL;
485 }
486
487 expected_len = ovs_key_lens[type].len;
488 if (!check_attr_len(nla_len(nla), expected_len)) {
489 OVS_NLERR(log, "Key %d has unexpected len %d expected %d",
490 type, nla_len(nla), expected_len);
491 return -EINVAL;
492 }
493
494 if (!nz || !is_all_zero(nla_data(nla), nla_len(nla))) {
495 attrs |= 1 << type;
496 a[type] = nla;
497 }
498 }
499 if (rem) {
500 OVS_NLERR(log, "Message has %d unknown bytes.", rem);
501 return -EINVAL;
502 }
503
504 *attrsp = attrs;
505 return 0;
506}
507
508static int parse_flow_mask_nlattrs(const struct nlattr *attr,
509 const struct nlattr *a[], u64 *attrsp,
510 bool log)
511{
512 return __parse_flow_nlattrs(attr, a, attrsp, log, true);
513}
514
515int parse_flow_nlattrs(const struct nlattr *attr, const struct nlattr *a[],
516 u64 *attrsp, bool log)
517{
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
566 opt_key_offset = TUN_METADATA_OFFSET(nla_len(a));
567 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, nla_data(a),
568 nla_len(a), is_mask);
569 return 0;
570}
571
572static int vxlan_tun_opt_from_nlattr(const struct nlattr *attr,
573 struct sw_flow_match *match, bool is_mask,
574 bool log)
575{
576 struct nlattr *a;
577 int rem;
578 unsigned long opt_key_offset;
579 struct vxlan_metadata opts;
580
581 BUILD_BUG_ON(sizeof(opts) > sizeof(match->key->tun_opts));
582
583 memset(&opts, 0, sizeof(opts));
584 nla_for_each_nested(a, attr, rem) {
585 int type = nla_type(a);
586
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 }
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
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
655static int ip_tun_from_nlattr(const struct nlattr *attr,
656 struct sw_flow_match *match, bool is_mask,
657 bool log)
658{
659 bool ttl = false, ipv4 = false, ipv6 = false;
660 bool info_bridge_mode = false;
661 __be16 tun_flags = 0;
662 int opts_type = 0;
663 struct nlattr *a;
664 int rem;
665
666 nla_for_each_nested(a, attr, rem) {
667 int type = nla_type(a);
668 int err;
669
670 if (type > OVS_TUNNEL_KEY_ATTR_MAX) {
671 OVS_NLERR(log, "Tunnel attr %d out of range max %d",
672 type, OVS_TUNNEL_KEY_ATTR_MAX);
673 return -EINVAL;
674 }
675
676 if (!check_attr_len(nla_len(a),
677 ovs_tunnel_key_lens[type].len)) {
678 OVS_NLERR(log, "Tunnel attr %d has unexpected len %d expected %d",
679 type, nla_len(a), ovs_tunnel_key_lens[type].len);
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:
690 SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.src,
691 nla_get_in_addr(a), is_mask);
692 ipv4 = true;
693 break;
694 case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
695 SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.dst,
696 nla_get_in_addr(a), is_mask);
697 ipv4 = true;
698 break;
699 case OVS_TUNNEL_KEY_ATTR_IPV6_SRC:
700 SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.src,
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;
708 break;
709 case OVS_TUNNEL_KEY_ATTR_TOS:
710 SW_FLOW_KEY_PUT(match, tun_key.tos,
711 nla_get_u8(a), is_mask);
712 break;
713 case OVS_TUNNEL_KEY_ATTR_TTL:
714 SW_FLOW_KEY_PUT(match, tun_key.ttl,
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;
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;
732 case OVS_TUNNEL_KEY_ATTR_OAM:
733 tun_flags |= TUNNEL_OAM;
734 break;
735 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
736 if (opts_type) {
737 OVS_NLERR(log, "Multiple metadata blocks provided");
738 return -EINVAL;
739 }
740
741 err = genev_tun_opt_from_nlattr(a, match, is_mask, log);
742 if (err)
743 return err;
744
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;
760 break;
761 case OVS_TUNNEL_KEY_ATTR_PAD:
762 break;
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;
777 case OVS_TUNNEL_KEY_ATTR_IPV4_INFO_BRIDGE:
778 info_bridge_mode = true;
779 ipv4 = true;
780 break;
781 default:
782 OVS_NLERR(log, "Unknown IP tunnel attribute %d",
783 type);
784 return -EINVAL;
785 }
786 }
787
788 SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask);
789 if (is_mask)
790 SW_FLOW_KEY_MEMSET_FIELD(match, tun_proto, 0xff, true);
791 else
792 SW_FLOW_KEY_PUT(match, tun_proto, ipv6 ? AF_INET6 : AF_INET,
793 false);
794
795 if (rem > 0) {
796 OVS_NLERR(log, "IP tunnel attribute has %d unknown bytes.",
797 rem);
798 return -EINVAL;
799 }
800
801 if (ipv4 && ipv6) {
802 OVS_NLERR(log, "Mixed IPv4 and IPv6 tunnel attributes");
803 return -EINVAL;
804 }
805
806 if (!is_mask) {
807 if (!ipv4 && !ipv6) {
808 OVS_NLERR(log, "IP tunnel dst address not specified");
809 return -EINVAL;
810 }
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 }
827 }
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 }
832
833 if (!ttl && !info_bridge_mode) {
834 OVS_NLERR(log, "IP tunnel TTL not specified.");
835 return -EINVAL;
836 }
837 }
838
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{
845 const struct vxlan_metadata *opts = tun_opts;
846 struct nlattr *nla;
847
848 nla = nla_nest_start_noflag(skb, OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS);
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);
856 return 0;
857}
858
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,
862 unsigned short tun_proto, u8 mode)
863{
864 if (output->tun_flags & TUNNEL_KEY &&
865 nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id,
866 OVS_TUNNEL_KEY_ATTR_PAD))
867 return -EMSGSIZE;
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
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 }
895 if (output->tos &&
896 nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->tos))
897 return -EMSGSIZE;
898 if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ttl))
899 return -EMSGSIZE;
900 if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) &&
901 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT))
902 return -EMSGSIZE;
903 if ((output->tun_flags & TUNNEL_CSUM) &&
904 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM))
905 return -EMSGSIZE;
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;
912 if ((output->tun_flags & TUNNEL_OAM) &&
913 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM))
914 return -EMSGSIZE;
915 if (swkey_tun_opts_len) {
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;
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;
927 }
928
929 return 0;
930}
931
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,
935 unsigned short tun_proto, u8 mode)
936{
937 struct nlattr *nla;
938 int err;
939
940 nla = nla_nest_start_noflag(skb, OVS_KEY_ATTR_TUNNEL);
941 if (!nla)
942 return -EMSGSIZE;
943
944 err = __ip_tun_to_nlattr(skb, output, tun_opts, swkey_tun_opts_len,
945 tun_proto, mode);
946 if (err)
947 return err;
948
949 nla_nest_end(skb, nla);
950 return 0;
951}
952
953int ovs_nla_put_tunnel_info(struct sk_buff *skb,
954 struct ip_tunnel_info *tun_info)
955{
956 return __ip_tun_to_nlattr(skb, &tun_info->key,
957 ip_tunnel_info_opts(tun_info),
958 tun_info->options_len,
959 ip_tunnel_info_af(tun_info), tun_info->mode);
960}
961
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
1007 if (!(tci & htons(VLAN_CFI_MASK))) {
1008 if (tci) {
1009 OVS_NLERR(log, "%s TCI does not have VLAN_CFI_MASK bit set.",
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 &
1030 htons(VLAN_CFI_MASK));
1031 bool i_encap_valid = !!(match->key->eth.cvlan.tci &
1032 htons(VLAN_CFI_MASK));
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 }
1056 if (!(tci & htons(VLAN_CFI_MASK))) {
1057 OVS_NLERR(log, "%s TCI mask does not have exact match for VLAN_CFI_MASK bit.",
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
1112 encap_valid = !!(match->key->eth.vlan.tci & htons(VLAN_CFI_MASK));
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
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
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)
1147{
1148 u8 mac_proto = MAC_PROTO_ETHERNET;
1149
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
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
1173 if (is_mask) {
1174 in_port = 0xffffffff; /* Always exact match in_port. */
1175 } else if (in_port >= DP_MAX_PORTS) {
1176 OVS_NLERR(log, "Port %d exceeds max allowable %d",
1177 in_port, DP_MAX_PORTS);
1178 return -EINVAL;
1179 }
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)) {
1194 if (ip_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match,
1195 is_mask, log) < 0)
1196 return -EINVAL;
1197 *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL);
1198 }
1199
1200 if (*attrs & (1 << OVS_KEY_ATTR_CT_STATE) &&
1201 ovs_ct_verify(net, OVS_KEY_ATTR_CT_STATE)) {
1202 u32 ct_state = nla_get_u32(a[OVS_KEY_ATTR_CT_STATE]);
1203
1204 if (ct_state & ~CT_SUPPORTED_MASK) {
1205 OVS_NLERR(log, "ct_state flags %08x unsupported",
1206 ct_state);
1207 return -EINVAL;
1208 }
1209
1210 SW_FLOW_KEY_PUT(match, ct_state, ct_state, is_mask);
1211 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_STATE);
1212 }
1213 if (*attrs & (1 << OVS_KEY_ATTR_CT_ZONE) &&
1214 ovs_ct_verify(net, OVS_KEY_ATTR_CT_ZONE)) {
1215 u16 ct_zone = nla_get_u16(a[OVS_KEY_ATTR_CT_ZONE]);
1216
1217 SW_FLOW_KEY_PUT(match, ct_zone, ct_zone, is_mask);
1218 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ZONE);
1219 }
1220 if (*attrs & (1 << OVS_KEY_ATTR_CT_MARK) &&
1221 ovs_ct_verify(net, OVS_KEY_ATTR_CT_MARK)) {
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 }
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;
1230
1231 cl = nla_data(a[OVS_KEY_ATTR_CT_LABELS]);
1232 SW_FLOW_KEY_MEMCPY(match, ct.labels, cl->ct_labels,
1233 sizeof(*cl), is_mask);
1234 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_LABELS);
1235 }
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);
1245 SW_FLOW_KEY_PUT(match, ct_orig_proto, ct->ipv4_proto, is_mask);
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);
1261 SW_FLOW_KEY_PUT(match, ct_orig_proto, ct->ipv6_proto, is_mask);
1262 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6);
1263 }
1264
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
1272 /* Always exact match mac_proto */
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);
1278
1279 return 0;
1280}
1281
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
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)
1500{
1501 int err;
1502
1503 err = metadata_from_nlattrs(net, match, &attrs, a, is_mask, log);
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);
1516
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.");
1522 return -EINVAL;
1523 }
1524
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;
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) {
1543 OVS_NLERR(log, "IPv4 frag type %d is out of range max %d",
1544 ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX);
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) {
1567 OVS_NLERR(log, "IPv6 frag type %d is out of range max %d",
1568 ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX);
1569 return -EINVAL;
1570 }
1571
1572 if (!is_mask && ipv6_key->ipv6_label & htonl(0xFFF00000)) {
1573 OVS_NLERR(log, "IPv6 flow label %x is out of range (max=%x)",
1574 ntohl(ipv6_key->ipv6_label), (1 << 20) - 1);
1575 return -EINVAL;
1576 }
1577
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))) {
1605 OVS_NLERR(log, "Unknown ARP opcode (opcode=%d).",
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
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
1631 if (attrs & (1 << OVS_KEY_ATTR_MPLS)) {
1632 const struct ovs_key_mpls *mpls_key;
1633 u32 hdr_len;
1634 u32 label_count, label_count_mask, i;
1635
1636 mpls_key = nla_data(a[OVS_KEY_ATTR_MPLS]);
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);
1652
1653 attrs &= ~(1 << OVS_KEY_ATTR_MPLS);
1654 }
1655
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]);
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);
1662 attrs &= ~(1 << OVS_KEY_ATTR_TCP);
1663 }
1664
1665 if (attrs & (1 << OVS_KEY_ATTR_TCP_FLAGS)) {
1666 SW_FLOW_KEY_PUT(match, tp.flags,
1667 nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]),
1668 is_mask);
1669 attrs &= ~(1 << OVS_KEY_ATTR_TCP_FLAGS);
1670 }
1671
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]);
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);
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]);
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);
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]);
1694 SW_FLOW_KEY_PUT(match, tp.src,
1695 htons(icmp_key->icmp_type), is_mask);
1696 SW_FLOW_KEY_PUT(match, tp.dst,
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]);
1705 SW_FLOW_KEY_PUT(match, tp.src,
1706 htons(icmpv6_key->icmpv6_type), is_mask);
1707 SW_FLOW_KEY_PUT(match, tp.dst,
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
1727 if (attrs != 0) {
1728 OVS_NLERR(log, "Unknown key attributes %llx",
1729 (unsigned long long)attrs);
1730 return -EINVAL;
1731 }
1732
1733 return 0;
1734}
1735
1736static void nlattr_set(struct nlattr *attr, u8 val,
1737 const struct ovs_len_tbl *tbl)
1738{
1739 struct nlattr *nla;
1740 int rem;
1741
1742 /* The nlattr stream should already have been validated */
1743 nla_for_each_nested(nla, attr, rem) {
1744 if (tbl[nla_type(nla)].len == OVS_ATTR_NESTED)
1745 nlattr_set(nla, val, tbl[nla_type(nla)].next ? : tbl);
1746 else
1747 memset(nla_data(nla), val, nla_len(nla));
1748
1749 if (nla_type(nla) == OVS_KEY_ATTR_CT_STATE)
1750 *(u32 *)nla_data(nla) &= CT_SUPPORTED_MASK;
1751 }
1752}
1753
1754static void mask_set_nlattr(struct nlattr *attr, u8 val)
1755{
1756 nlattr_set(attr, val, ovs_key_lens);
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.
1764 * @net: Used to determine per-namespace field support.
1765 * @match: receives the extracted flow match information.
1766 * @nla_key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
1767 * sequence. The fields should of the packet that triggered the creation
1768 * of this flow.
1769 * @nla_mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_*
1770 * Netlink attribute specifies the mask field of the wildcarded flow.
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.
1774 */
1775int ovs_nla_get_match(struct net *net, struct sw_flow_match *match,
1776 const struct nlattr *nla_key,
1777 const struct nlattr *nla_mask,
1778 bool log)
1779{
1780 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
1781 struct nlattr *newmask = NULL;
1782 u64 key_attrs = 0;
1783 u64 mask_attrs = 0;
1784 int err;
1785
1786 err = parse_flow_nlattrs(nla_key, a, &key_attrs, log);
1787 if (err)
1788 return err;
1789
1790 err = parse_vlan_from_nlattrs(match, &key_attrs, a, false, log);
1791 if (err)
1792 return err;
1793
1794 err = ovs_key_from_nlattrs(net, match, key_attrs, a, false, log);
1795 if (err)
1796 return err;
1797
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;
1815
1816 mask_set_nlattr(newmask, 0xff);
1817
1818 /* The userspace does not send tunnel attributes that
1819 * are 0, but we should not wildcard them nonetheless.
1820 */
1821 if (match->key->tun_proto)
1822 SW_FLOW_KEY_MEMSET_FIELD(match, tun_key,
1823 0xff, true);
1824
1825 nla_mask = newmask;
1826 }
1827
1828 err = parse_flow_mask_nlattrs(nla_mask, a, &mask_attrs, log);
1829 if (err)
1830 goto free_newmask;
1831
1832 /* Always match on tci. */
1833 SW_FLOW_KEY_PUT(match, eth.vlan.tci, htons(0xffff), true);
1834 SW_FLOW_KEY_PUT(match, eth.cvlan.tci, htons(0xffff), true);
1835
1836 err = parse_vlan_from_nlattrs(match, &mask_attrs, a, true, log);
1837 if (err)
1838 goto free_newmask;
1839
1840 err = ovs_key_from_nlattrs(net, match, mask_attrs, a, true,
1841 log);
1842 if (err)
1843 goto free_newmask;
1844 }
1845
1846 if (!match_validate(match, key_attrs, mask_attrs, log))
1847 err = -EINVAL;
1848
1849free_newmask:
1850 kfree(newmask);
1851 return err;
1852}
1853
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
1907/**
1908 * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key.
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.
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.
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.
1923 *
1924 * This must be called before the packet key fields are filled in 'key'.
1925 */
1926
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)
1930{
1931 struct sw_flow_match match;
1932
1933 memset(&match, 0, sizeof(match));
1934 match.key = key;
1935
1936 key->ct_state = 0;
1937 key->ct_zone = 0;
1938 key->ct_orig_proto = 0;
1939 memset(&key->ct, 0, sizeof(key->ct));
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
1943 key->phy.in_port = DP_MAX_PORTS;
1944
1945 return metadata_from_nlattrs(net, &match, &attrs, a, false, log);
1946}
1947
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
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
1964 start = nla_nest_start_noflag(skb, OVS_KEY_ATTR_NSH);
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
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)
1990{
1991 struct ovs_key_ethernet *eth_key;
1992 struct nlattr *nla;
1993 struct nlattr *encap = NULL;
1994 struct nlattr *in_encap = NULL;
1995
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
2002 if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority))
2003 goto nla_put_failure;
2004
2005 if ((swkey->tun_proto || is_mask)) {
2006 const void *opts = NULL;
2007
2008 if (output->tun_key.tun_flags & TUNNEL_OPTIONS_PRESENT)
2009 opts = TUN_METADATA_OPTS(output, swkey->tun_opts_len);
2010
2011 if (ip_tun_to_nlattr(skb, &output->tun_key, opts,
2012 swkey->tun_opts_len, swkey->tun_proto, 0))
2013 goto nla_put_failure;
2014 }
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
2032 if (ovs_ct_put_key(swkey, output, skb))
2033 goto nla_put_failure;
2034
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)
2038 goto nla_put_failure;
2039
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))
2046 goto nla_put_failure;
2047 encap = nla_nest_start_noflag(skb, OVS_KEY_ATTR_ENCAP);
2048 if (!swkey->eth.vlan.tci)
2049 goto unencap;
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;
2054 in_encap = nla_nest_start_noflag(skb,
2055 OVS_KEY_ATTR_ENCAP);
2056 if (!swkey->eth.cvlan.tci)
2057 goto unencap;
2058 }
2059 }
2060
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 }
2074 }
2075
2076 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type))
2077 goto nla_put_failure;
2078
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
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;
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;
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);
2131 ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha);
2132 ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha);
2133 } else if (eth_p_mpls(swkey->eth.type)) {
2134 u8 i, num_labels;
2135 struct ovs_key_mpls *mpls_key;
2136
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));
2140 if (!nla)
2141 goto nla_put_failure;
2142
2143 mpls_key = nla_data(nla);
2144 for (i = 0; i < num_labels; i++)
2145 mpls_key[i].mpls_lse = output->mpls.lse[i];
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);
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;
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);
2171 udp_key->udp_src = output->tp.src;
2172 udp_key->udp_dst = output->tp.dst;
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);
2180 sctp_key->sctp_src = output->tp.src;
2181 sctp_key->sctp_dst = output->tp.dst;
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);
2190 icmp_key->icmp_type = ntohs(output->tp.src);
2191 icmp_key->icmp_code = ntohs(output->tp.dst);
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);
2201 icmpv6_key->icmpv6_type = ntohs(output->tp.src);
2202 icmpv6_key->icmpv6_code = ntohs(output->tp.dst);
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));
2214 ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll);
2215 ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll);
2216 }
2217 }
2218 }
2219
2220unencap:
2221 if (in_encap)
2222 nla_nest_end(skb, in_encap);
2223 if (encap)
2224 nla_nest_end(skb, encap);
2225
2226 return 0;
2227
2228nla_put_failure:
2229 return -EMSGSIZE;
2230}
2231
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
2239 nla = nla_nest_start_noflag(skb, attr);
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. */
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)
2263{
2264 return ovs_nla_put_key(&flow->key, &flow->key,
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
2275#define MAX_ACTIONS_BUFSIZE (32 * 1024)
2276
2277static struct sw_flow_actions *nla_alloc_flow_actions(int size)
2278{
2279 struct sw_flow_actions *sfa;
2280
2281 WARN_ON_ONCE(size > MAX_ACTIONS_BUFSIZE);
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
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;
2317 case OVS_ACTION_ATTR_CT:
2318 ovs_ct_free_action(a);
2319 break;
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
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. */
2333void ovs_nla_free_flow_actions_rcu(struct sw_flow_actions *sf_acts)
2334{
2335 call_rcu(&sf_acts->rcu, __ovs_nla_free_flow_actions);
2336}
2337
2338static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa,
2339 int attr_len, bool log)
2340{
2341
2342 struct sw_flow_actions *acts;
2343 int new_acts_size;
2344 size_t req_size = NLA_ALIGN(attr_len);
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
2351 new_acts_size = max(next_offset + req_size, ksize(*sfa) * 2);
2352
2353 if (new_acts_size > MAX_ACTIONS_BUFSIZE) {
2354 if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size) {
2355 OVS_NLERR(log, "Flow action size exceeds max %u",
2356 MAX_ACTIONS_BUFSIZE);
2357 return ERR_PTR(-EMSGSIZE);
2358 }
2359 new_acts_size = MAX_ACTIONS_BUFSIZE;
2360 }
2361
2362 acts = nla_alloc_flow_actions(new_acts_size);
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;
2368 acts->orig_len = (*sfa)->orig_len;
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
2377static struct nlattr *__add_action(struct sw_flow_actions **sfa,
2378 int attrtype, void *data, int len, bool log)
2379{
2380 struct nlattr *a;
2381
2382 a = reserve_sfa_size(sfa, nla_attr_size(len), log);
2383 if (IS_ERR(a))
2384 return a;
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
2393 return a;
2394}
2395
2396int ovs_nla_add_action(struct sw_flow_actions **sfa, int attrtype, void *data,
2397 int len, bool log)
2398{
2399 struct nlattr *a;
2400
2401 a = __add_action(sfa, attrtype, data, len, log);
2402
2403 return PTR_ERR_OR_ZERO(a);
2404}
2405
2406static inline int add_nested_action_start(struct sw_flow_actions **sfa,
2407 int attrtype, bool log)
2408{
2409 int used = (*sfa)->actions_len;
2410 int err;
2411
2412 err = ovs_nla_add_action(sfa, attrtype, NULL, 0, log);
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
2428static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
2429 const struct sw_flow_key *key,
2430 struct sw_flow_actions **sfa,
2431 __be16 eth_type, __be16 vlan_tci,
2432 u32 mpls_label_count, bool log);
2433
2434static int validate_and_copy_sample(struct net *net, const struct nlattr *attr,
2435 const struct sw_flow_key *key,
2436 struct sw_flow_actions **sfa,
2437 __be16 eth_type, __be16 vlan_tci,
2438 u32 mpls_label_count, bool log, bool last)
2439{
2440 const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];
2441 const struct nlattr *probability, *actions;
2442 const struct nlattr *a;
2443 int rem, start, err;
2444 struct sample_arg arg;
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. */
2465 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE, log);
2466 if (start < 0)
2467 return start;
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);
2485 if (err)
2486 return err;
2487
2488 err = __ovs_nla_copy_actions(net, actions, key, sfa,
2489 eth_type, vlan_tci, mpls_label_count, log);
2490
2491 if (err)
2492 return err;
2493
2494 add_nested_action_end(*sfa, start);
2495
2496 return 0;
2497}
2498
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
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,
2537 u32 mpls_label_count, bool log, bool last)
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,
2557 eth_type, vlan_tci, mpls_label_count, log);
2558 if (err)
2559 return err;
2560
2561 add_nested_action_end(*sfa, start);
2562
2563 return 0;
2564}
2565
2566void ovs_match_init(struct sw_flow_match *match,
2567 struct sw_flow_key *key,
2568 bool reset_key,
2569 struct sw_flow_mask *mask)
2570{
2571 memset(match, 0, sizeof(*match));
2572 match->key = key;
2573 match->mask = mask;
2574
2575 if (reset_key)
2576 memset(key, 0, sizeof(*key));
2577
2578 if (mask) {
2579 memset(&mask->key, 0, sizeof(mask->key));
2580 mask->range.start = mask->range.end = 0;
2581 }
2582}
2583
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;
2605 }
2606
2607 key->tun_key.tun_flags |= crit_opt ? TUNNEL_CRIT_OPT : 0;
2608
2609 return 0;
2610}
2611
2612static int validate_and_copy_set_tun(const struct nlattr *attr,
2613 struct sw_flow_actions **sfa, bool log)
2614{
2615 struct sw_flow_match match;
2616 struct sw_flow_key key;
2617 struct metadata_dst *tun_dst;
2618 struct ip_tunnel_info *tun_info;
2619 struct ovs_tunnel_info *ovs_tun;
2620 struct nlattr *a;
2621 int err = 0, start, opts_type;
2622 __be16 dst_opt_type;
2623
2624 dst_opt_type = 0;
2625 ovs_match_init(&match, &key, true, NULL);
2626 opts_type = ip_tun_from_nlattr(nla_data(attr), &match, false, log);
2627 if (opts_type < 0)
2628 return opts_type;
2629
2630 if (key.tun_opts_len) {
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;
2636 dst_opt_type = TUNNEL_GENEVE_OPT;
2637 break;
2638 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
2639 dst_opt_type = TUNNEL_VXLAN_OPT;
2640 break;
2641 case OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS:
2642 dst_opt_type = TUNNEL_ERSPAN_OPT;
2643 break;
2644 }
2645 }
2646
2647 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET, log);
2648 if (start < 0)
2649 return start;
2650
2651 tun_dst = metadata_dst_alloc(key.tun_opts_len, METADATA_IP_TUNNEL,
2652 GFP_KERNEL);
2653
2654 if (!tun_dst)
2655 return -ENOMEM;
2656
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
2663 a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL,
2664 sizeof(*ovs_tun), log);
2665 if (IS_ERR(a)) {
2666 dst_release((struct dst_entry *)tun_dst);
2667 return PTR_ERR(a);
2668 }
2669
2670 ovs_tun = nla_data(a);
2671 ovs_tun->tun_dst = tun_dst;
2672
2673 tun_info = &tun_dst->u.tun_info;
2674 tun_info->mode = IP_TUNNEL_INFO_TX;
2675 if (key.tun_proto == AF_INET6)
2676 tun_info->mode |= IP_TUNNEL_INFO_IPV6;
2677 else if (key.tun_proto == AF_INET && key.tun_key.u.ipv4.dst == 0)
2678 tun_info->mode |= IP_TUNNEL_INFO_BRIDGE;
2679 tun_info->key = key.tun_key;
2680
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),
2687 key.tun_opts_len, dst_opt_type);
2688 add_nested_action_end(*sfa, start);
2689
2690 return err;
2691}
2692
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
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
2720static int validate_set(const struct nlattr *a,
2721 const struct sw_flow_key *flow_key,
2722 struct sw_flow_actions **sfa, bool *skip_copy,
2723 u8 mac_proto, __be16 eth_type, bool masked, bool log)
2724{
2725 const struct nlattr *ovs_key = nla_data(a);
2726 int key_type = nla_type(ovs_key);
2727 size_t key_len;
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
2733 key_len = nla_len(ovs_key);
2734 if (masked)
2735 key_len /= 2;
2736
2737 if (key_type > OVS_KEY_ATTR_MAX ||
2738 !check_attr_len(key_len, ovs_key_lens[key_type].len))
2739 return -EINVAL;
2740
2741 if (masked && !validate_masked(nla_data(ovs_key), key_len))
2742 return -EINVAL;
2743
2744 switch (key_type) {
2745 case OVS_KEY_ATTR_PRIORITY:
2746 case OVS_KEY_ATTR_SKB_MARK:
2747 case OVS_KEY_ATTR_CT_MARK:
2748 case OVS_KEY_ATTR_CT_LABELS:
2749 break;
2750
2751 case OVS_KEY_ATTR_ETHERNET:
2752 if (mac_proto != MAC_PROTO_ETHERNET)
2753 return -EINVAL;
2754 break;
2755
2756 case OVS_KEY_ATTR_TUNNEL: {
2757 int err;
2758
2759 if (masked)
2760 return -EINVAL; /* Masked tunnel set not supported. */
2761
2762 *skip_copy = true;
2763 err = validate_and_copy_set_tun(a, sfa, log);
2764 if (err)
2765 return err;
2766 break;
2767 }
2768 case OVS_KEY_ATTR_IPV4: {
2769 const struct ovs_key_ipv4 *ipv4_key;
2770
2771 if (eth_type != htons(ETH_P_IP))
2772 return -EINVAL;
2773
2774 ipv4_key = nla_data(ovs_key);
2775
2776 if (masked) {
2777 const struct ovs_key_ipv4 *mask = ipv4_key + 1;
2778
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 }
2789 break;
2790 }
2791 case OVS_KEY_ATTR_IPV6: {
2792 const struct ovs_key_ipv6 *ipv6_key;
2793
2794 if (eth_type != htons(ETH_P_IPV6))
2795 return -EINVAL;
2796
2797 ipv6_key = nla_data(ovs_key);
2798
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;
2812
2813 if (ipv6_key->ipv6_frag != flow_key->ip.frag)
2814 return -EINVAL;
2815 }
2816 if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000)
2817 return -EINVAL;
2818
2819 break;
2820 }
2821 case OVS_KEY_ATTR_TCP:
2822 if ((eth_type != htons(ETH_P_IP) &&
2823 eth_type != htons(ETH_P_IPV6)) ||
2824 flow_key->ip.proto != IPPROTO_TCP)
2825 return -EINVAL;
2826
2827 break;
2828
2829 case OVS_KEY_ATTR_UDP:
2830 if ((eth_type != htons(ETH_P_IP) &&
2831 eth_type != htons(ETH_P_IPV6)) ||
2832 flow_key->ip.proto != IPPROTO_UDP)
2833 return -EINVAL;
2834
2835 break;
2836
2837 case OVS_KEY_ATTR_MPLS:
2838 if (!eth_p_mpls(eth_type))
2839 return -EINVAL;
2840 break;
2841
2842 case OVS_KEY_ATTR_SCTP:
2843 if ((eth_type != htons(ETH_P_IP) &&
2844 eth_type != htons(ETH_P_IPV6)) ||
2845 flow_key->ip.proto != IPPROTO_SCTP)
2846 return -EINVAL;
2847
2848 break;
2849
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
2857 default:
2858 return -EINVAL;
2859 }
2860
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
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 },
2897 [OVS_USERSPACE_ATTR_EGRESS_TUN_PORT] = {.type = NLA_U32 },
2898 };
2899 struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];
2900 int error;
2901
2902 error = nla_parse_nested_deprecated(a, OVS_USERSPACE_ATTR_MAX, attr,
2903 userspace_policy, NULL);
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
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,
2925 u32 mpls_label_count,
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
2934 err = nla_parse_deprecated_strict(a, OVS_CHECK_PKT_LEN_ATTR_MAX,
2935 nla_data(attr), nla_len(attr),
2936 cpl_policy, NULL);
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,
2974 eth_type, vlan_tci, mpls_label_count, log);
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,
2987 eth_type, vlan_tci, mpls_label_count, log);
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
2997static int copy_action(const struct nlattr *from,
2998 struct sw_flow_actions **sfa, bool log)
2999{
3000 int totlen = NLA_ALIGN(from->nla_len);
3001 struct nlattr *to;
3002
3003 to = reserve_sfa_size(sfa, from->nla_len, log);
3004 if (IS_ERR(to))
3005 return PTR_ERR(to);
3006
3007 memcpy(to, from, totlen);
3008 return 0;
3009}
3010
3011static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
3012 const struct sw_flow_key *key,
3013 struct sw_flow_actions **sfa,
3014 __be16 eth_type, __be16 vlan_tci,
3015 u32 mpls_label_count, bool log)
3016{
3017 u8 mac_proto = ovs_key_mac_proto(key);
3018 const struct nlattr *a;
3019 int rem, err;
3020
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),
3025 [OVS_ACTION_ATTR_RECIRC] = sizeof(u32),
3026 [OVS_ACTION_ATTR_USERSPACE] = (u32)-1,
3027 [OVS_ACTION_ATTR_PUSH_MPLS] = sizeof(struct ovs_action_push_mpls),
3028 [OVS_ACTION_ATTR_POP_MPLS] = sizeof(__be16),
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,
3032 [OVS_ACTION_ATTR_SET_MASKED] = (u32)-1,
3033 [OVS_ACTION_ATTR_SAMPLE] = (u32)-1,
3034 [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash),
3035 [OVS_ACTION_ATTR_CT] = (u32)-1,
3036 [OVS_ACTION_ATTR_CT_CLEAR] = 0,
3037 [OVS_ACTION_ATTR_TRUNC] = sizeof(struct ovs_action_trunc),
3038 [OVS_ACTION_ATTR_PUSH_ETH] = sizeof(struct ovs_action_push_eth),
3039 [OVS_ACTION_ATTR_POP_ETH] = 0,
3040 [OVS_ACTION_ATTR_PUSH_NSH] = (u32)-1,
3041 [OVS_ACTION_ATTR_POP_NSH] = 0,
3042 [OVS_ACTION_ATTR_METER] = sizeof(u32),
3043 [OVS_ACTION_ATTR_CLONE] = (u32)-1,
3044 [OVS_ACTION_ATTR_CHECK_PKT_LEN] = (u32)-1,
3045 [OVS_ACTION_ATTR_ADD_MPLS] = sizeof(struct ovs_action_add_mpls),
3046 [OVS_ACTION_ATTR_DEC_TTL] = (u32)-1,
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
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
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 }
3093
3094 case OVS_ACTION_ATTR_POP_VLAN:
3095 if (mac_proto != MAC_PROTO_ETHERNET)
3096 return -EINVAL;
3097 vlan_tci = htons(0);
3098 break;
3099
3100 case OVS_ACTION_ATTR_PUSH_VLAN:
3101 if (mac_proto != MAC_PROTO_ETHERNET)
3102 return -EINVAL;
3103 vlan = nla_data(a);
3104 if (!eth_type_vlan(vlan->vlan_tpid))
3105 return -EINVAL;
3106 if (!(vlan->vlan_tci & htons(VLAN_CFI_MASK)))
3107 return -EINVAL;
3108 vlan_tci = vlan->vlan_tci;
3109 break;
3110
3111 case OVS_ACTION_ATTR_RECIRC:
3112 break;
3113
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
3141 case OVS_ACTION_ATTR_PUSH_MPLS: {
3142 const struct ovs_action_push_mpls *mpls = nla_data(a);
3143
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 */
3149 if (vlan_tci & htons(VLAN_CFI_MASK) ||
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;
3157 mpls_label_count++;
3158 break;
3159 }
3160
3161 case OVS_ACTION_ATTR_POP_MPLS: {
3162 __be16 proto;
3163 if (vlan_tci & htons(VLAN_CFI_MASK) ||
3164 !eth_p_mpls(eth_type))
3165 return -EINVAL;
3166
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.
3173 *
3174 * Support for these actions is planned using packet
3175 * recirculation.
3176 */
3177 proto = nla_get_be16(a);
3178
3179 if (proto == htons(ETH_P_TEB) &&
3180 mac_proto != MAC_PROTO_NONE)
3181 return -EINVAL;
3182
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
3190 break;
3191 }
3192
3193 case OVS_ACTION_ATTR_SET:
3194 err = validate_set(a, key, sfa,
3195 &skip_copy, mac_proto, eth_type,
3196 false, log);
3197 if (err)
3198 return err;
3199 break;
3200
3201 case OVS_ACTION_ATTR_SET_MASKED:
3202 err = validate_set(a, key, sfa,
3203 &skip_copy, mac_proto, eth_type,
3204 true, log);
3205 if (err)
3206 return err;
3207 break;
3208
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,
3214 mpls_label_count,
3215 log, last);
3216 if (err)
3217 return err;
3218 skip_copy = true;
3219 break;
3220 }
3221
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
3229 case OVS_ACTION_ATTR_CT_CLEAR:
3230 break;
3231
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;
3237 mac_proto = MAC_PROTO_ETHERNET;
3238 break;
3239
3240 case OVS_ACTION_ATTR_POP_ETH:
3241 if (mac_proto != MAC_PROTO_ETHERNET)
3242 return -EINVAL;
3243 if (vlan_tci & htons(VLAN_CFI_MASK))
3244 return -EINVAL;
3245 mac_proto = MAC_PROTO_NONE;
3246 break;
3247
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
3276 case OVS_ACTION_ATTR_METER:
3277 /* Non-existent meters are simply ignored. */
3278 break;
3279
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,
3285 mpls_label_count,
3286 log, last);
3287 if (err)
3288 return err;
3289 skip_copy = true;
3290 break;
3291 }
3292
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,
3298 vlan_tci,
3299 mpls_label_count,
3300 log, last);
3301 if (err)
3302 return err;
3303 skip_copy = true;
3304 break;
3305 }
3306
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
3316 default:
3317 OVS_NLERR(log, "Unknown Action type %d", type);
3318 return -EINVAL;
3319 }
3320 if (!skip_copy) {
3321 err = copy_action(a, sfa, log);
3322 if (err)
3323 return err;
3324 }
3325 }
3326
3327 if (rem > 0)
3328 return -EINVAL;
3329
3330 return 0;
3331}
3332
3333/* 'key' must be the masked key. */
3334int ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
3335 const struct sw_flow_key *key,
3336 struct sw_flow_actions **sfa, bool log)
3337{
3338 int err;
3339 u32 mpls_label_count = 0;
3340
3341 *sfa = nla_alloc_flow_actions(min(nla_len(attr), MAX_ACTIONS_BUFSIZE));
3342 if (IS_ERR(*sfa))
3343 return PTR_ERR(*sfa);
3344
3345 if (eth_p_mpls(key->eth.type))
3346 mpls_label_count = hweight_long(key->mpls.num_labels_mask);
3347
3348 (*sfa)->orig_len = nla_len(attr);
3349 err = __ovs_nla_copy_actions(net, attr, key, sfa, key->eth.type,
3350 key->eth.vlan.tci, mpls_label_count, log);
3351 if (err)
3352 ovs_nla_free_flow_actions(*sfa);
3353
3354 return err;
3355}
3356
3357static int sample_action_to_attr(const struct nlattr *attr,
3358 struct sk_buff *skb)
3359{
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;
3364
3365 start = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_SAMPLE);
3366 if (!start)
3367 return -EMSGSIZE;
3368
3369 sample_arg = nla_data(attr);
3370 arg = nla_data(sample_arg);
3371 actions = nla_next(sample_arg, &rem);
3372
3373 if (nla_put_u32(skb, OVS_SAMPLE_ATTR_PROBABILITY, arg->probability)) {
3374 err = -EMSGSIZE;
3375 goto out;
3376 }
3377
3378 ac_start = nla_nest_start_noflag(skb, OVS_SAMPLE_ATTR_ACTIONS);
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);
3393 }
3394
3395 return err;
3396}
3397
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
3404 start = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_CLONE);
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
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
3426 start = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_CHECK_PKT_LEN);
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);
3445 ac_start = nla_nest_start_noflag(skb,
3446 OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL);
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);
3464 ac_start = nla_nest_start_noflag(skb,
3465 OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER);
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
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
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) {
3515 case OVS_KEY_ATTR_TUNNEL_INFO: {
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;
3518
3519 start = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_SET);
3520 if (!start)
3521 return -EMSGSIZE;
3522
3523 err = ip_tun_to_nlattr(skb, &tun_info->key,
3524 ip_tunnel_info_opts(tun_info),
3525 tun_info->options_len,
3526 ip_tunnel_info_af(tun_info), tun_info->mode);
3527 if (err)
3528 return err;
3529 nla_nest_end(skb, start);
3530 break;
3531 }
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
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);
3545 struct nlattr *nla;
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 */
3551 nla = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_SET);
3552 if (!nla)
3553 return -EMSGSIZE;
3554
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);
3559 return 0;
3560}
3561
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
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
3583 case OVS_ACTION_ATTR_SAMPLE:
3584 err = sample_action_to_attr(a, skb);
3585 if (err)
3586 return err;
3587 break;
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
3595 case OVS_ACTION_ATTR_CLONE:
3596 err = clone_action_to_attr(a, skb);
3597 if (err)
3598 return err;
3599 break;
3600
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
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
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}