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dm thin metadata: fix __udivdi3 undefined on 32-bit
[linux/fpc-iii.git] / net / openvswitch / flow_netlink.c
blob624c4719e4045018c4456ed6d8d88126d4426ffd
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
54 struct 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
62 static 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
123 static bool match_validate(const struct sw_flow_match *match,
124 u64 key_attrs, u64 mask_attrs, bool log)
125 {
126 u64 key_expected = 1 << OVS_KEY_ATTR_ETHERNET;
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
259 size_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(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
280 size_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
308 static 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
312 static 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. */
331 static 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
360 static 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
367 static 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
381 static 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
426 static 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
433 static 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
440 static 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
491 static 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
547 static 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 default:
653 OVS_NLERR(log, "Unknown IP tunnel attribute %d",
654 type);
655 return -EINVAL;
656 }
657 }
658
659 SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask);
660 if (is_mask)
661 SW_FLOW_KEY_MEMSET_FIELD(match, tun_proto, 0xff, true);
662 else
663 SW_FLOW_KEY_PUT(match, tun_proto, ipv6 ? AF_INET6 : AF_INET,
664 false);
665
666 if (rem > 0) {
667 OVS_NLERR(log, "IP tunnel attribute has %d unknown bytes.",
668 rem);
669 return -EINVAL;
670 }
671
672 if (ipv4 && ipv6) {
673 OVS_NLERR(log, "Mixed IPv4 and IPv6 tunnel attributes");
674 return -EINVAL;
675 }
676
677 if (!is_mask) {
678 if (!ipv4 && !ipv6) {
679 OVS_NLERR(log, "IP tunnel dst address not specified");
680 return -EINVAL;
681 }
682 if (ipv4 && !match->key->tun_key.u.ipv4.dst) {
683 OVS_NLERR(log, "IPv4 tunnel dst address is zero");
684 return -EINVAL;
685 }
686 if (ipv6 && ipv6_addr_any(&match->key->tun_key.u.ipv6.dst)) {
687 OVS_NLERR(log, "IPv6 tunnel dst address is zero");
688 return -EINVAL;
689 }
690
691 if (!ttl) {
692 OVS_NLERR(log, "IP tunnel TTL not specified.");
693 return -EINVAL;
694 }
695 }
696
697 return opts_type;
698 }
699
700 static int vxlan_opt_to_nlattr(struct sk_buff *skb,
701 const void *tun_opts, int swkey_tun_opts_len)
702 {
703 const struct vxlan_metadata *opts = tun_opts;
704 struct nlattr *nla;
705
706 nla = nla_nest_start(skb, OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS);
707 if (!nla)
708 return -EMSGSIZE;
709
710 if (nla_put_u32(skb, OVS_VXLAN_EXT_GBP, opts->gbp) < 0)
711 return -EMSGSIZE;
712
713 nla_nest_end(skb, nla);
714 return 0;
715 }
716
717 static int __ip_tun_to_nlattr(struct sk_buff *skb,
718 const struct ip_tunnel_key *output,
719 const void *tun_opts, int swkey_tun_opts_len,
720 unsigned short tun_proto)
721 {
722 if (output->tun_flags & TUNNEL_KEY &&
723 nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id))
724 return -EMSGSIZE;
725 switch (tun_proto) {
726 case AF_INET:
727 if (output->u.ipv4.src &&
728 nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC,
729 output->u.ipv4.src))
730 return -EMSGSIZE;
731 if (output->u.ipv4.dst &&
732 nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST,
733 output->u.ipv4.dst))
734 return -EMSGSIZE;
735 break;
736 case AF_INET6:
737 if (!ipv6_addr_any(&output->u.ipv6.src) &&
738 nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_SRC,
739 &output->u.ipv6.src))
740 return -EMSGSIZE;
741 if (!ipv6_addr_any(&output->u.ipv6.dst) &&
742 nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_DST,
743 &output->u.ipv6.dst))
744 return -EMSGSIZE;
745 break;
746 }
747 if (output->tos &&
748 nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->tos))
749 return -EMSGSIZE;
750 if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ttl))
751 return -EMSGSIZE;
752 if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) &&
753 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT))
754 return -EMSGSIZE;
755 if ((output->tun_flags & TUNNEL_CSUM) &&
756 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM))
757 return -EMSGSIZE;
758 if (output->tp_src &&
759 nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_SRC, output->tp_src))
760 return -EMSGSIZE;
761 if (output->tp_dst &&
762 nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_DST, output->tp_dst))
763 return -EMSGSIZE;
764 if ((output->tun_flags & TUNNEL_OAM) &&
765 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM))
766 return -EMSGSIZE;
767 if (swkey_tun_opts_len) {
768 if (output->tun_flags & TUNNEL_GENEVE_OPT &&
769 nla_put(skb, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS,
770 swkey_tun_opts_len, tun_opts))
771 return -EMSGSIZE;
772 else if (output->tun_flags & TUNNEL_VXLAN_OPT &&
773 vxlan_opt_to_nlattr(skb, tun_opts, swkey_tun_opts_len))
774 return -EMSGSIZE;
775 }
776
777 return 0;
778 }
779
780 static int ip_tun_to_nlattr(struct sk_buff *skb,
781 const struct ip_tunnel_key *output,
782 const void *tun_opts, int swkey_tun_opts_len,
783 unsigned short tun_proto)
784 {
785 struct nlattr *nla;
786 int err;
787
788 nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL);
789 if (!nla)
790 return -EMSGSIZE;
791
792 err = __ip_tun_to_nlattr(skb, output, tun_opts, swkey_tun_opts_len,
793 tun_proto);
794 if (err)
795 return err;
796
797 nla_nest_end(skb, nla);
798 return 0;
799 }
800
801 int ovs_nla_put_tunnel_info(struct sk_buff *skb,
802 struct ip_tunnel_info *tun_info)
803 {
804 return __ip_tun_to_nlattr(skb, &tun_info->key,
805 ip_tunnel_info_opts(tun_info),
806 tun_info->options_len,
807 ip_tunnel_info_af(tun_info));
808 }
809
810 static int metadata_from_nlattrs(struct net *net, struct sw_flow_match *match,
811 u64 *attrs, const struct nlattr **a,
812 bool is_mask, bool log)
813 {
814 if (*attrs & (1 << OVS_KEY_ATTR_DP_HASH)) {
815 u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]);
816
817 SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask);
818 *attrs &= ~(1 << OVS_KEY_ATTR_DP_HASH);
819 }
820
821 if (*attrs & (1 << OVS_KEY_ATTR_RECIRC_ID)) {
822 u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]);
823
824 SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask);
825 *attrs &= ~(1 << OVS_KEY_ATTR_RECIRC_ID);
826 }
827
828 if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) {
829 SW_FLOW_KEY_PUT(match, phy.priority,
830 nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask);
831 *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY);
832 }
833
834 if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) {
835 u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]);
836
837 if (is_mask) {
838 in_port = 0xffffffff; /* Always exact match in_port. */
839 } else if (in_port >= DP_MAX_PORTS) {
840 OVS_NLERR(log, "Port %d exceeds max allowable %d",
841 in_port, DP_MAX_PORTS);
842 return -EINVAL;
843 }
844
845 SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask);
846 *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT);
847 } else if (!is_mask) {
848 SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask);
849 }
850
851 if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) {
852 uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]);
853
854 SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask);
855 *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK);
856 }
857 if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) {
858 if (ip_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match,
859 is_mask, log) < 0)
860 return -EINVAL;
861 *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL);
862 }
863
864 if (*attrs & (1 << OVS_KEY_ATTR_CT_STATE) &&
865 ovs_ct_verify(net, OVS_KEY_ATTR_CT_STATE)) {
866 u32 ct_state = nla_get_u32(a[OVS_KEY_ATTR_CT_STATE]);
867
868 if (ct_state & ~CT_SUPPORTED_MASK) {
869 OVS_NLERR(log, "ct_state flags %08x unsupported",
870 ct_state);
871 return -EINVAL;
872 }
873
874 SW_FLOW_KEY_PUT(match, ct.state, ct_state, is_mask);
875 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_STATE);
876 }
877 if (*attrs & (1 << OVS_KEY_ATTR_CT_ZONE) &&
878 ovs_ct_verify(net, OVS_KEY_ATTR_CT_ZONE)) {
879 u16 ct_zone = nla_get_u16(a[OVS_KEY_ATTR_CT_ZONE]);
880
881 SW_FLOW_KEY_PUT(match, ct.zone, ct_zone, is_mask);
882 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ZONE);
883 }
884 if (*attrs & (1 << OVS_KEY_ATTR_CT_MARK) &&
885 ovs_ct_verify(net, OVS_KEY_ATTR_CT_MARK)) {
886 u32 mark = nla_get_u32(a[OVS_KEY_ATTR_CT_MARK]);
887
888 SW_FLOW_KEY_PUT(match, ct.mark, mark, is_mask);
889 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_MARK);
890 }
891 if (*attrs & (1 << OVS_KEY_ATTR_CT_LABELS) &&
892 ovs_ct_verify(net, OVS_KEY_ATTR_CT_LABELS)) {
893 const struct ovs_key_ct_labels *cl;
894
895 cl = nla_data(a[OVS_KEY_ATTR_CT_LABELS]);
896 SW_FLOW_KEY_MEMCPY(match, ct.labels, cl->ct_labels,
897 sizeof(*cl), is_mask);
898 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_LABELS);
899 }
900 return 0;
901 }
902
903 static int ovs_key_from_nlattrs(struct net *net, struct sw_flow_match *match,
904 u64 attrs, const struct nlattr **a,
905 bool is_mask, bool log)
906 {
907 int err;
908
909 err = metadata_from_nlattrs(net, match, &attrs, a, is_mask, log);
910 if (err)
911 return err;
912
913 if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) {
914 const struct ovs_key_ethernet *eth_key;
915
916 eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]);
917 SW_FLOW_KEY_MEMCPY(match, eth.src,
918 eth_key->eth_src, ETH_ALEN, is_mask);
919 SW_FLOW_KEY_MEMCPY(match, eth.dst,
920 eth_key->eth_dst, ETH_ALEN, is_mask);
921 attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET);
922 }
923
924 if (attrs & (1 << OVS_KEY_ATTR_VLAN)) {
925 __be16 tci;
926
927 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
928 if (!(tci & htons(VLAN_TAG_PRESENT))) {
929 if (is_mask)
930 OVS_NLERR(log, "VLAN TCI mask does not have exact match for VLAN_TAG_PRESENT bit.");
931 else
932 OVS_NLERR(log, "VLAN TCI does not have VLAN_TAG_PRESENT bit set.");
933
934 return -EINVAL;
935 }
936
937 SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask);
938 attrs &= ~(1 << OVS_KEY_ATTR_VLAN);
939 }
940
941 if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) {
942 __be16 eth_type;
943
944 eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
945 if (is_mask) {
946 /* Always exact match EtherType. */
947 eth_type = htons(0xffff);
948 } else if (!eth_proto_is_802_3(eth_type)) {
949 OVS_NLERR(log, "EtherType %x is less than min %x",
950 ntohs(eth_type), ETH_P_802_3_MIN);
951 return -EINVAL;
952 }
953
954 SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask);
955 attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
956 } else if (!is_mask) {
957 SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask);
958 }
959
960 if (attrs & (1 << OVS_KEY_ATTR_IPV4)) {
961 const struct ovs_key_ipv4 *ipv4_key;
962
963 ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]);
964 if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) {
965 OVS_NLERR(log, "IPv4 frag type %d is out of range max %d",
966 ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX);
967 return -EINVAL;
968 }
969 SW_FLOW_KEY_PUT(match, ip.proto,
970 ipv4_key->ipv4_proto, is_mask);
971 SW_FLOW_KEY_PUT(match, ip.tos,
972 ipv4_key->ipv4_tos, is_mask);
973 SW_FLOW_KEY_PUT(match, ip.ttl,
974 ipv4_key->ipv4_ttl, is_mask);
975 SW_FLOW_KEY_PUT(match, ip.frag,
976 ipv4_key->ipv4_frag, is_mask);
977 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
978 ipv4_key->ipv4_src, is_mask);
979 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
980 ipv4_key->ipv4_dst, is_mask);
981 attrs &= ~(1 << OVS_KEY_ATTR_IPV4);
982 }
983
984 if (attrs & (1 << OVS_KEY_ATTR_IPV6)) {
985 const struct ovs_key_ipv6 *ipv6_key;
986
987 ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]);
988 if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) {
989 OVS_NLERR(log, "IPv6 frag type %d is out of range max %d",
990 ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX);
991 return -EINVAL;
992 }
993
994 if (!is_mask && ipv6_key->ipv6_label & htonl(0xFFF00000)) {
995 OVS_NLERR(log, "IPv6 flow label %x is out of range (max=%x).\n",
996 ntohl(ipv6_key->ipv6_label), (1 << 20) - 1);
997 return -EINVAL;
998 }
999
1000 SW_FLOW_KEY_PUT(match, ipv6.label,
1001 ipv6_key->ipv6_label, is_mask);
1002 SW_FLOW_KEY_PUT(match, ip.proto,
1003 ipv6_key->ipv6_proto, is_mask);
1004 SW_FLOW_KEY_PUT(match, ip.tos,
1005 ipv6_key->ipv6_tclass, is_mask);
1006 SW_FLOW_KEY_PUT(match, ip.ttl,
1007 ipv6_key->ipv6_hlimit, is_mask);
1008 SW_FLOW_KEY_PUT(match, ip.frag,
1009 ipv6_key->ipv6_frag, is_mask);
1010 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src,
1011 ipv6_key->ipv6_src,
1012 sizeof(match->key->ipv6.addr.src),
1013 is_mask);
1014 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst,
1015 ipv6_key->ipv6_dst,
1016 sizeof(match->key->ipv6.addr.dst),
1017 is_mask);
1018
1019 attrs &= ~(1 << OVS_KEY_ATTR_IPV6);
1020 }
1021
1022 if (attrs & (1 << OVS_KEY_ATTR_ARP)) {
1023 const struct ovs_key_arp *arp_key;
1024
1025 arp_key = nla_data(a[OVS_KEY_ATTR_ARP]);
1026 if (!is_mask && (arp_key->arp_op & htons(0xff00))) {
1027 OVS_NLERR(log, "Unknown ARP opcode (opcode=%d).",
1028 arp_key->arp_op);
1029 return -EINVAL;
1030 }
1031
1032 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
1033 arp_key->arp_sip, is_mask);
1034 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
1035 arp_key->arp_tip, is_mask);
1036 SW_FLOW_KEY_PUT(match, ip.proto,
1037 ntohs(arp_key->arp_op), is_mask);
1038 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha,
1039 arp_key->arp_sha, ETH_ALEN, is_mask);
1040 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha,
1041 arp_key->arp_tha, ETH_ALEN, is_mask);
1042
1043 attrs &= ~(1 << OVS_KEY_ATTR_ARP);
1044 }
1045
1046 if (attrs & (1 << OVS_KEY_ATTR_MPLS)) {
1047 const struct ovs_key_mpls *mpls_key;
1048
1049 mpls_key = nla_data(a[OVS_KEY_ATTR_MPLS]);
1050 SW_FLOW_KEY_PUT(match, mpls.top_lse,
1051 mpls_key->mpls_lse, is_mask);
1052
1053 attrs &= ~(1 << OVS_KEY_ATTR_MPLS);
1054 }
1055
1056 if (attrs & (1 << OVS_KEY_ATTR_TCP)) {
1057 const struct ovs_key_tcp *tcp_key;
1058
1059 tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]);
1060 SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask);
1061 SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask);
1062 attrs &= ~(1 << OVS_KEY_ATTR_TCP);
1063 }
1064
1065 if (attrs & (1 << OVS_KEY_ATTR_TCP_FLAGS)) {
1066 SW_FLOW_KEY_PUT(match, tp.flags,
1067 nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]),
1068 is_mask);
1069 attrs &= ~(1 << OVS_KEY_ATTR_TCP_FLAGS);
1070 }
1071
1072 if (attrs & (1 << OVS_KEY_ATTR_UDP)) {
1073 const struct ovs_key_udp *udp_key;
1074
1075 udp_key = nla_data(a[OVS_KEY_ATTR_UDP]);
1076 SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask);
1077 SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask);
1078 attrs &= ~(1 << OVS_KEY_ATTR_UDP);
1079 }
1080
1081 if (attrs & (1 << OVS_KEY_ATTR_SCTP)) {
1082 const struct ovs_key_sctp *sctp_key;
1083
1084 sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]);
1085 SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask);
1086 SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask);
1087 attrs &= ~(1 << OVS_KEY_ATTR_SCTP);
1088 }
1089
1090 if (attrs & (1 << OVS_KEY_ATTR_ICMP)) {
1091 const struct ovs_key_icmp *icmp_key;
1092
1093 icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]);
1094 SW_FLOW_KEY_PUT(match, tp.src,
1095 htons(icmp_key->icmp_type), is_mask);
1096 SW_FLOW_KEY_PUT(match, tp.dst,
1097 htons(icmp_key->icmp_code), is_mask);
1098 attrs &= ~(1 << OVS_KEY_ATTR_ICMP);
1099 }
1100
1101 if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) {
1102 const struct ovs_key_icmpv6 *icmpv6_key;
1103
1104 icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]);
1105 SW_FLOW_KEY_PUT(match, tp.src,
1106 htons(icmpv6_key->icmpv6_type), is_mask);
1107 SW_FLOW_KEY_PUT(match, tp.dst,
1108 htons(icmpv6_key->icmpv6_code), is_mask);
1109 attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6);
1110 }
1111
1112 if (attrs & (1 << OVS_KEY_ATTR_ND)) {
1113 const struct ovs_key_nd *nd_key;
1114
1115 nd_key = nla_data(a[OVS_KEY_ATTR_ND]);
1116 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target,
1117 nd_key->nd_target,
1118 sizeof(match->key->ipv6.nd.target),
1119 is_mask);
1120 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll,
1121 nd_key->nd_sll, ETH_ALEN, is_mask);
1122 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll,
1123 nd_key->nd_tll, ETH_ALEN, is_mask);
1124 attrs &= ~(1 << OVS_KEY_ATTR_ND);
1125 }
1126
1127 if (attrs != 0) {
1128 OVS_NLERR(log, "Unknown key attributes %llx",
1129 (unsigned long long)attrs);
1130 return -EINVAL;
1131 }
1132
1133 return 0;
1134 }
1135
1136 static void nlattr_set(struct nlattr *attr, u8 val,
1137 const struct ovs_len_tbl *tbl)
1138 {
1139 struct nlattr *nla;
1140 int rem;
1141
1142 /* The nlattr stream should already have been validated */
1143 nla_for_each_nested(nla, attr, rem) {
1144 if (tbl[nla_type(nla)].len == OVS_ATTR_NESTED)
1145 nlattr_set(nla, val, tbl[nla_type(nla)].next ? : tbl);
1146 else
1147 memset(nla_data(nla), val, nla_len(nla));
1148
1149 if (nla_type(nla) == OVS_KEY_ATTR_CT_STATE)
1150 *(u32 *)nla_data(nla) &= CT_SUPPORTED_MASK;
1151 }
1152 }
1153
1154 static void mask_set_nlattr(struct nlattr *attr, u8 val)
1155 {
1156 nlattr_set(attr, val, ovs_key_lens);
1157 }
1158
1159 /**
1160 * ovs_nla_get_match - parses Netlink attributes into a flow key and
1161 * mask. In case the 'mask' is NULL, the flow is treated as exact match
1162 * flow. Otherwise, it is treated as a wildcarded flow, except the mask
1163 * does not include any don't care bit.
1164 * @net: Used to determine per-namespace field support.
1165 * @match: receives the extracted flow match information.
1166 * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
1167 * sequence. The fields should of the packet that triggered the creation
1168 * of this flow.
1169 * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink
1170 * attribute specifies the mask field of the wildcarded flow.
1171 * @log: Boolean to allow kernel error logging. Normally true, but when
1172 * probing for feature compatibility this should be passed in as false to
1173 * suppress unnecessary error logging.
1174 */
1175 int ovs_nla_get_match(struct net *net, struct sw_flow_match *match,
1176 const struct nlattr *nla_key,
1177 const struct nlattr *nla_mask,
1178 bool log)
1179 {
1180 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
1181 const struct nlattr *encap;
1182 struct nlattr *newmask = NULL;
1183 u64 key_attrs = 0;
1184 u64 mask_attrs = 0;
1185 bool encap_valid = false;
1186 int err;
1187
1188 err = parse_flow_nlattrs(nla_key, a, &key_attrs, log);
1189 if (err)
1190 return err;
1191
1192 if ((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) &&
1193 (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) &&
1194 (nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]) == htons(ETH_P_8021Q))) {
1195 __be16 tci;
1196
1197 if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) &&
1198 (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) {
1199 OVS_NLERR(log, "Invalid Vlan frame.");
1200 return -EINVAL;
1201 }
1202
1203 key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
1204 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
1205 encap = a[OVS_KEY_ATTR_ENCAP];
1206 key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP);
1207 encap_valid = true;
1208
1209 if (tci & htons(VLAN_TAG_PRESENT)) {
1210 err = parse_flow_nlattrs(encap, a, &key_attrs, log);
1211 if (err)
1212 return err;
1213 } else if (!tci) {
1214 /* Corner case for truncated 802.1Q header. */
1215 if (nla_len(encap)) {
1216 OVS_NLERR(log, "Truncated 802.1Q header has non-zero encap attribute.");
1217 return -EINVAL;
1218 }
1219 } else {
1220 OVS_NLERR(log, "Encap attr is set for non-VLAN frame");
1221 return -EINVAL;
1222 }
1223 }
1224
1225 err = ovs_key_from_nlattrs(net, match, key_attrs, a, false, log);
1226 if (err)
1227 return err;
1228
1229 if (match->mask) {
1230 if (!nla_mask) {
1231 /* Create an exact match mask. We need to set to 0xff
1232 * all the 'match->mask' fields that have been touched
1233 * in 'match->key'. We cannot simply memset
1234 * 'match->mask', because padding bytes and fields not
1235 * specified in 'match->key' should be left to 0.
1236 * Instead, we use a stream of netlink attributes,
1237 * copied from 'key' and set to 0xff.
1238 * ovs_key_from_nlattrs() will take care of filling
1239 * 'match->mask' appropriately.
1240 */
1241 newmask = kmemdup(nla_key,
1242 nla_total_size(nla_len(nla_key)),
1243 GFP_KERNEL);
1244 if (!newmask)
1245 return -ENOMEM;
1246
1247 mask_set_nlattr(newmask, 0xff);
1248
1249 /* The userspace does not send tunnel attributes that
1250 * are 0, but we should not wildcard them nonetheless.
1251 */
1252 if (match->key->tun_proto)
1253 SW_FLOW_KEY_MEMSET_FIELD(match, tun_key,
1254 0xff, true);
1255
1256 nla_mask = newmask;
1257 }
1258
1259 err = parse_flow_mask_nlattrs(nla_mask, a, &mask_attrs, log);
1260 if (err)
1261 goto free_newmask;
1262
1263 /* Always match on tci. */
1264 SW_FLOW_KEY_PUT(match, eth.tci, htons(0xffff), true);
1265
1266 if (mask_attrs & 1 << OVS_KEY_ATTR_ENCAP) {
1267 __be16 eth_type = 0;
1268 __be16 tci = 0;
1269
1270 if (!encap_valid) {
1271 OVS_NLERR(log, "Encap mask attribute is set for non-VLAN frame.");
1272 err = -EINVAL;
1273 goto free_newmask;
1274 }
1275
1276 mask_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP);
1277 if (a[OVS_KEY_ATTR_ETHERTYPE])
1278 eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
1279
1280 if (eth_type == htons(0xffff)) {
1281 mask_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
1282 encap = a[OVS_KEY_ATTR_ENCAP];
1283 err = parse_flow_mask_nlattrs(encap, a,
1284 &mask_attrs, log);
1285 if (err)
1286 goto free_newmask;
1287 } else {
1288 OVS_NLERR(log, "VLAN frames must have an exact match on the TPID (mask=%x).",
1289 ntohs(eth_type));
1290 err = -EINVAL;
1291 goto free_newmask;
1292 }
1293
1294 if (a[OVS_KEY_ATTR_VLAN])
1295 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
1296
1297 if (!(tci & htons(VLAN_TAG_PRESENT))) {
1298 OVS_NLERR(log, "VLAN tag present bit must have an exact match (tci_mask=%x).",
1299 ntohs(tci));
1300 err = -EINVAL;
1301 goto free_newmask;
1302 }
1303 }
1304
1305 err = ovs_key_from_nlattrs(net, match, mask_attrs, a, true,
1306 log);
1307 if (err)
1308 goto free_newmask;
1309 }
1310
1311 if (!match_validate(match, key_attrs, mask_attrs, log))
1312 err = -EINVAL;
1313
1314 free_newmask:
1315 kfree(newmask);
1316 return err;
1317 }
1318
1319 static size_t get_ufid_len(const struct nlattr *attr, bool log)
1320 {
1321 size_t len;
1322
1323 if (!attr)
1324 return 0;
1325
1326 len = nla_len(attr);
1327 if (len < 1 || len > MAX_UFID_LENGTH) {
1328 OVS_NLERR(log, "ufid size %u bytes exceeds the range (1, %d)",
1329 nla_len(attr), MAX_UFID_LENGTH);
1330 return 0;
1331 }
1332
1333 return len;
1334 }
1335
1336 /* Initializes 'flow->ufid', returning true if 'attr' contains a valid UFID,
1337 * or false otherwise.
1338 */
1339 bool ovs_nla_get_ufid(struct sw_flow_id *sfid, const struct nlattr *attr,
1340 bool log)
1341 {
1342 sfid->ufid_len = get_ufid_len(attr, log);
1343 if (sfid->ufid_len)
1344 memcpy(sfid->ufid, nla_data(attr), sfid->ufid_len);
1345
1346 return sfid->ufid_len;
1347 }
1348
1349 int ovs_nla_get_identifier(struct sw_flow_id *sfid, const struct nlattr *ufid,
1350 const struct sw_flow_key *key, bool log)
1351 {
1352 struct sw_flow_key *new_key;
1353
1354 if (ovs_nla_get_ufid(sfid, ufid, log))
1355 return 0;
1356
1357 /* If UFID was not provided, use unmasked key. */
1358 new_key = kmalloc(sizeof(*new_key), GFP_KERNEL);
1359 if (!new_key)
1360 return -ENOMEM;
1361 memcpy(new_key, key, sizeof(*key));
1362 sfid->unmasked_key = new_key;
1363
1364 return 0;
1365 }
1366
1367 u32 ovs_nla_get_ufid_flags(const struct nlattr *attr)
1368 {
1369 return attr ? nla_get_u32(attr) : 0;
1370 }
1371
1372 /**
1373 * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key.
1374 * @key: Receives extracted in_port, priority, tun_key and skb_mark.
1375 * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
1376 * sequence.
1377 * @log: Boolean to allow kernel error logging. Normally true, but when
1378 * probing for feature compatibility this should be passed in as false to
1379 * suppress unnecessary error logging.
1380 *
1381 * This parses a series of Netlink attributes that form a flow key, which must
1382 * take the same form accepted by flow_from_nlattrs(), but only enough of it to
1383 * get the metadata, that is, the parts of the flow key that cannot be
1384 * extracted from the packet itself.
1385 */
1386
1387 int ovs_nla_get_flow_metadata(struct net *net, const struct nlattr *attr,
1388 struct sw_flow_key *key,
1389 bool log)
1390 {
1391 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
1392 struct sw_flow_match match;
1393 u64 attrs = 0;
1394 int err;
1395
1396 err = parse_flow_nlattrs(attr, a, &attrs, log);
1397 if (err)
1398 return -EINVAL;
1399
1400 memset(&match, 0, sizeof(match));
1401 match.key = key;
1402
1403 memset(&key->ct, 0, sizeof(key->ct));
1404 key->phy.in_port = DP_MAX_PORTS;
1405
1406 return metadata_from_nlattrs(net, &match, &attrs, a, false, log);
1407 }
1408
1409 static int __ovs_nla_put_key(const struct sw_flow_key *swkey,
1410 const struct sw_flow_key *output, bool is_mask,
1411 struct sk_buff *skb)
1412 {
1413 struct ovs_key_ethernet *eth_key;
1414 struct nlattr *nla, *encap;
1415
1416 if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id))
1417 goto nla_put_failure;
1418
1419 if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash))
1420 goto nla_put_failure;
1421
1422 if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority))
1423 goto nla_put_failure;
1424
1425 if ((swkey->tun_proto || is_mask)) {
1426 const void *opts = NULL;
1427
1428 if (output->tun_key.tun_flags & TUNNEL_OPTIONS_PRESENT)
1429 opts = TUN_METADATA_OPTS(output, swkey->tun_opts_len);
1430
1431 if (ip_tun_to_nlattr(skb, &output->tun_key, opts,
1432 swkey->tun_opts_len, swkey->tun_proto))
1433 goto nla_put_failure;
1434 }
1435
1436 if (swkey->phy.in_port == DP_MAX_PORTS) {
1437 if (is_mask && (output->phy.in_port == 0xffff))
1438 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff))
1439 goto nla_put_failure;
1440 } else {
1441 u16 upper_u16;
1442 upper_u16 = !is_mask ? 0 : 0xffff;
1443
1444 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT,
1445 (upper_u16 << 16) | output->phy.in_port))
1446 goto nla_put_failure;
1447 }
1448
1449 if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark))
1450 goto nla_put_failure;
1451
1452 if (ovs_ct_put_key(output, skb))
1453 goto nla_put_failure;
1454
1455 nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key));
1456 if (!nla)
1457 goto nla_put_failure;
1458
1459 eth_key = nla_data(nla);
1460 ether_addr_copy(eth_key->eth_src, output->eth.src);
1461 ether_addr_copy(eth_key->eth_dst, output->eth.dst);
1462
1463 if (swkey->eth.tci || swkey->eth.type == htons(ETH_P_8021Q)) {
1464 __be16 eth_type;
1465 eth_type = !is_mask ? htons(ETH_P_8021Q) : htons(0xffff);
1466 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) ||
1467 nla_put_be16(skb, OVS_KEY_ATTR_VLAN, output->eth.tci))
1468 goto nla_put_failure;
1469 encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
1470 if (!swkey->eth.tci)
1471 goto unencap;
1472 } else
1473 encap = NULL;
1474
1475 if (swkey->eth.type == htons(ETH_P_802_2)) {
1476 /*
1477 * Ethertype 802.2 is represented in the netlink with omitted
1478 * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and
1479 * 0xffff in the mask attribute. Ethertype can also
1480 * be wildcarded.
1481 */
1482 if (is_mask && output->eth.type)
1483 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE,
1484 output->eth.type))
1485 goto nla_put_failure;
1486 goto unencap;
1487 }
1488
1489 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type))
1490 goto nla_put_failure;
1491
1492 if (swkey->eth.type == htons(ETH_P_IP)) {
1493 struct ovs_key_ipv4 *ipv4_key;
1494
1495 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key));
1496 if (!nla)
1497 goto nla_put_failure;
1498 ipv4_key = nla_data(nla);
1499 ipv4_key->ipv4_src = output->ipv4.addr.src;
1500 ipv4_key->ipv4_dst = output->ipv4.addr.dst;
1501 ipv4_key->ipv4_proto = output->ip.proto;
1502 ipv4_key->ipv4_tos = output->ip.tos;
1503 ipv4_key->ipv4_ttl = output->ip.ttl;
1504 ipv4_key->ipv4_frag = output->ip.frag;
1505 } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
1506 struct ovs_key_ipv6 *ipv6_key;
1507
1508 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key));
1509 if (!nla)
1510 goto nla_put_failure;
1511 ipv6_key = nla_data(nla);
1512 memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src,
1513 sizeof(ipv6_key->ipv6_src));
1514 memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst,
1515 sizeof(ipv6_key->ipv6_dst));
1516 ipv6_key->ipv6_label = output->ipv6.label;
1517 ipv6_key->ipv6_proto = output->ip.proto;
1518 ipv6_key->ipv6_tclass = output->ip.tos;
1519 ipv6_key->ipv6_hlimit = output->ip.ttl;
1520 ipv6_key->ipv6_frag = output->ip.frag;
1521 } else if (swkey->eth.type == htons(ETH_P_ARP) ||
1522 swkey->eth.type == htons(ETH_P_RARP)) {
1523 struct ovs_key_arp *arp_key;
1524
1525 nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key));
1526 if (!nla)
1527 goto nla_put_failure;
1528 arp_key = nla_data(nla);
1529 memset(arp_key, 0, sizeof(struct ovs_key_arp));
1530 arp_key->arp_sip = output->ipv4.addr.src;
1531 arp_key->arp_tip = output->ipv4.addr.dst;
1532 arp_key->arp_op = htons(output->ip.proto);
1533 ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha);
1534 ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha);
1535 } else if (eth_p_mpls(swkey->eth.type)) {
1536 struct ovs_key_mpls *mpls_key;
1537
1538 nla = nla_reserve(skb, OVS_KEY_ATTR_MPLS, sizeof(*mpls_key));
1539 if (!nla)
1540 goto nla_put_failure;
1541 mpls_key = nla_data(nla);
1542 mpls_key->mpls_lse = output->mpls.top_lse;
1543 }
1544
1545 if ((swkey->eth.type == htons(ETH_P_IP) ||
1546 swkey->eth.type == htons(ETH_P_IPV6)) &&
1547 swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
1548
1549 if (swkey->ip.proto == IPPROTO_TCP) {
1550 struct ovs_key_tcp *tcp_key;
1551
1552 nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key));
1553 if (!nla)
1554 goto nla_put_failure;
1555 tcp_key = nla_data(nla);
1556 tcp_key->tcp_src = output->tp.src;
1557 tcp_key->tcp_dst = output->tp.dst;
1558 if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS,
1559 output->tp.flags))
1560 goto nla_put_failure;
1561 } else if (swkey->ip.proto == IPPROTO_UDP) {
1562 struct ovs_key_udp *udp_key;
1563
1564 nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key));
1565 if (!nla)
1566 goto nla_put_failure;
1567 udp_key = nla_data(nla);
1568 udp_key->udp_src = output->tp.src;
1569 udp_key->udp_dst = output->tp.dst;
1570 } else if (swkey->ip.proto == IPPROTO_SCTP) {
1571 struct ovs_key_sctp *sctp_key;
1572
1573 nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key));
1574 if (!nla)
1575 goto nla_put_failure;
1576 sctp_key = nla_data(nla);
1577 sctp_key->sctp_src = output->tp.src;
1578 sctp_key->sctp_dst = output->tp.dst;
1579 } else if (swkey->eth.type == htons(ETH_P_IP) &&
1580 swkey->ip.proto == IPPROTO_ICMP) {
1581 struct ovs_key_icmp *icmp_key;
1582
1583 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key));
1584 if (!nla)
1585 goto nla_put_failure;
1586 icmp_key = nla_data(nla);
1587 icmp_key->icmp_type = ntohs(output->tp.src);
1588 icmp_key->icmp_code = ntohs(output->tp.dst);
1589 } else if (swkey->eth.type == htons(ETH_P_IPV6) &&
1590 swkey->ip.proto == IPPROTO_ICMPV6) {
1591 struct ovs_key_icmpv6 *icmpv6_key;
1592
1593 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6,
1594 sizeof(*icmpv6_key));
1595 if (!nla)
1596 goto nla_put_failure;
1597 icmpv6_key = nla_data(nla);
1598 icmpv6_key->icmpv6_type = ntohs(output->tp.src);
1599 icmpv6_key->icmpv6_code = ntohs(output->tp.dst);
1600
1601 if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION ||
1602 icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) {
1603 struct ovs_key_nd *nd_key;
1604
1605 nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key));
1606 if (!nla)
1607 goto nla_put_failure;
1608 nd_key = nla_data(nla);
1609 memcpy(nd_key->nd_target, &output->ipv6.nd.target,
1610 sizeof(nd_key->nd_target));
1611 ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll);
1612 ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll);
1613 }
1614 }
1615 }
1616
1617 unencap:
1618 if (encap)
1619 nla_nest_end(skb, encap);
1620
1621 return 0;
1622
1623 nla_put_failure:
1624 return -EMSGSIZE;
1625 }
1626
1627 int ovs_nla_put_key(const struct sw_flow_key *swkey,
1628 const struct sw_flow_key *output, int attr, bool is_mask,
1629 struct sk_buff *skb)
1630 {
1631 int err;
1632 struct nlattr *nla;
1633
1634 nla = nla_nest_start(skb, attr);
1635 if (!nla)
1636 return -EMSGSIZE;
1637 err = __ovs_nla_put_key(swkey, output, is_mask, skb);
1638 if (err)
1639 return err;
1640 nla_nest_end(skb, nla);
1641
1642 return 0;
1643 }
1644
1645 /* Called with ovs_mutex or RCU read lock. */
1646 int ovs_nla_put_identifier(const struct sw_flow *flow, struct sk_buff *skb)
1647 {
1648 if (ovs_identifier_is_ufid(&flow->id))
1649 return nla_put(skb, OVS_FLOW_ATTR_UFID, flow->id.ufid_len,
1650 flow->id.ufid);
1651
1652 return ovs_nla_put_key(flow->id.unmasked_key, flow->id.unmasked_key,
1653 OVS_FLOW_ATTR_KEY, false, skb);
1654 }
1655
1656 /* Called with ovs_mutex or RCU read lock. */
1657 int ovs_nla_put_masked_key(const struct sw_flow *flow, struct sk_buff *skb)
1658 {
1659 return ovs_nla_put_key(&flow->key, &flow->key,
1660 OVS_FLOW_ATTR_KEY, false, skb);
1661 }
1662
1663 /* Called with ovs_mutex or RCU read lock. */
1664 int ovs_nla_put_mask(const struct sw_flow *flow, struct sk_buff *skb)
1665 {
1666 return ovs_nla_put_key(&flow->key, &flow->mask->key,
1667 OVS_FLOW_ATTR_MASK, true, skb);
1668 }
1669
1670 #define MAX_ACTIONS_BUFSIZE (32 * 1024)
1671
1672 static struct sw_flow_actions *nla_alloc_flow_actions(int size)
1673 {
1674 struct sw_flow_actions *sfa;
1675
1676 WARN_ON_ONCE(size > MAX_ACTIONS_BUFSIZE);
1677
1678 sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL);
1679 if (!sfa)
1680 return ERR_PTR(-ENOMEM);
1681
1682 sfa->actions_len = 0;
1683 return sfa;
1684 }
1685
1686 static void ovs_nla_free_set_action(const struct nlattr *a)
1687 {
1688 const struct nlattr *ovs_key = nla_data(a);
1689 struct ovs_tunnel_info *ovs_tun;
1690
1691 switch (nla_type(ovs_key)) {
1692 case OVS_KEY_ATTR_TUNNEL_INFO:
1693 ovs_tun = nla_data(ovs_key);
1694 dst_release((struct dst_entry *)ovs_tun->tun_dst);
1695 break;
1696 }
1697 }
1698
1699 void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts)
1700 {
1701 const struct nlattr *a;
1702 int rem;
1703
1704 if (!sf_acts)
1705 return;
1706
1707 nla_for_each_attr(a, sf_acts->actions, sf_acts->actions_len, rem) {
1708 switch (nla_type(a)) {
1709 case OVS_ACTION_ATTR_SET:
1710 ovs_nla_free_set_action(a);
1711 break;
1712 case OVS_ACTION_ATTR_CT:
1713 ovs_ct_free_action(a);
1714 break;
1715 }
1716 }
1717
1718 kfree(sf_acts);
1719 }
1720
1721 static void __ovs_nla_free_flow_actions(struct rcu_head *head)
1722 {
1723 ovs_nla_free_flow_actions(container_of(head, struct sw_flow_actions, rcu));
1724 }
1725
1726 /* Schedules 'sf_acts' to be freed after the next RCU grace period.
1727 * The caller must hold rcu_read_lock for this to be sensible. */
1728 void ovs_nla_free_flow_actions_rcu(struct sw_flow_actions *sf_acts)
1729 {
1730 call_rcu(&sf_acts->rcu, __ovs_nla_free_flow_actions);
1731 }
1732
1733 static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa,
1734 int attr_len, bool log)
1735 {
1736
1737 struct sw_flow_actions *acts;
1738 int new_acts_size;
1739 int req_size = NLA_ALIGN(attr_len);
1740 int next_offset = offsetof(struct sw_flow_actions, actions) +
1741 (*sfa)->actions_len;
1742
1743 if (req_size <= (ksize(*sfa) - next_offset))
1744 goto out;
1745
1746 new_acts_size = ksize(*sfa) * 2;
1747
1748 if (new_acts_size > MAX_ACTIONS_BUFSIZE) {
1749 if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size) {
1750 OVS_NLERR(log, "Flow action size exceeds max %u",
1751 MAX_ACTIONS_BUFSIZE);
1752 return ERR_PTR(-EMSGSIZE);
1753 }
1754 new_acts_size = MAX_ACTIONS_BUFSIZE;
1755 }
1756
1757 acts = nla_alloc_flow_actions(new_acts_size);
1758 if (IS_ERR(acts))
1759 return (void *)acts;
1760
1761 memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len);
1762 acts->actions_len = (*sfa)->actions_len;
1763 acts->orig_len = (*sfa)->orig_len;
1764 kfree(*sfa);
1765 *sfa = acts;
1766
1767 out:
1768 (*sfa)->actions_len += req_size;
1769 return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset);
1770 }
1771
1772 static struct nlattr *__add_action(struct sw_flow_actions **sfa,
1773 int attrtype, void *data, int len, bool log)
1774 {
1775 struct nlattr *a;
1776
1777 a = reserve_sfa_size(sfa, nla_attr_size(len), log);
1778 if (IS_ERR(a))
1779 return a;
1780
1781 a->nla_type = attrtype;
1782 a->nla_len = nla_attr_size(len);
1783
1784 if (data)
1785 memcpy(nla_data(a), data, len);
1786 memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len));
1787
1788 return a;
1789 }
1790
1791 int ovs_nla_add_action(struct sw_flow_actions **sfa, int attrtype, void *data,
1792 int len, bool log)
1793 {
1794 struct nlattr *a;
1795
1796 a = __add_action(sfa, attrtype, data, len, log);
1797
1798 return PTR_ERR_OR_ZERO(a);
1799 }
1800
1801 static inline int add_nested_action_start(struct sw_flow_actions **sfa,
1802 int attrtype, bool log)
1803 {
1804 int used = (*sfa)->actions_len;
1805 int err;
1806
1807 err = ovs_nla_add_action(sfa, attrtype, NULL, 0, log);
1808 if (err)
1809 return err;
1810
1811 return used;
1812 }
1813
1814 static inline void add_nested_action_end(struct sw_flow_actions *sfa,
1815 int st_offset)
1816 {
1817 struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions +
1818 st_offset);
1819
1820 a->nla_len = sfa->actions_len - st_offset;
1821 }
1822
1823 static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
1824 const struct sw_flow_key *key,
1825 int depth, struct sw_flow_actions **sfa,
1826 __be16 eth_type, __be16 vlan_tci, bool log);
1827
1828 static int validate_and_copy_sample(struct net *net, const struct nlattr *attr,
1829 const struct sw_flow_key *key, int depth,
1830 struct sw_flow_actions **sfa,
1831 __be16 eth_type, __be16 vlan_tci, bool log)
1832 {
1833 const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];
1834 const struct nlattr *probability, *actions;
1835 const struct nlattr *a;
1836 int rem, start, err, st_acts;
1837
1838 memset(attrs, 0, sizeof(attrs));
1839 nla_for_each_nested(a, attr, rem) {
1840 int type = nla_type(a);
1841 if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type])
1842 return -EINVAL;
1843 attrs[type] = a;
1844 }
1845 if (rem)
1846 return -EINVAL;
1847
1848 probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY];
1849 if (!probability || nla_len(probability) != sizeof(u32))
1850 return -EINVAL;
1851
1852 actions = attrs[OVS_SAMPLE_ATTR_ACTIONS];
1853 if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN))
1854 return -EINVAL;
1855
1856 /* validation done, copy sample action. */
1857 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE, log);
1858 if (start < 0)
1859 return start;
1860 err = ovs_nla_add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY,
1861 nla_data(probability), sizeof(u32), log);
1862 if (err)
1863 return err;
1864 st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS, log);
1865 if (st_acts < 0)
1866 return st_acts;
1867
1868 err = __ovs_nla_copy_actions(net, actions, key, depth + 1, sfa,
1869 eth_type, vlan_tci, log);
1870 if (err)
1871 return err;
1872
1873 add_nested_action_end(*sfa, st_acts);
1874 add_nested_action_end(*sfa, start);
1875
1876 return 0;
1877 }
1878
1879 void ovs_match_init(struct sw_flow_match *match,
1880 struct sw_flow_key *key,
1881 struct sw_flow_mask *mask)
1882 {
1883 memset(match, 0, sizeof(*match));
1884 match->key = key;
1885 match->mask = mask;
1886
1887 memset(key, 0, sizeof(*key));
1888
1889 if (mask) {
1890 memset(&mask->key, 0, sizeof(mask->key));
1891 mask->range.start = mask->range.end = 0;
1892 }
1893 }
1894
1895 static int validate_geneve_opts(struct sw_flow_key *key)
1896 {
1897 struct geneve_opt *option;
1898 int opts_len = key->tun_opts_len;
1899 bool crit_opt = false;
1900
1901 option = (struct geneve_opt *)TUN_METADATA_OPTS(key, key->tun_opts_len);
1902 while (opts_len > 0) {
1903 int len;
1904
1905 if (opts_len < sizeof(*option))
1906 return -EINVAL;
1907
1908 len = sizeof(*option) + option->length * 4;
1909 if (len > opts_len)
1910 return -EINVAL;
1911
1912 crit_opt |= !!(option->type & GENEVE_CRIT_OPT_TYPE);
1913
1914 option = (struct geneve_opt *)((u8 *)option + len);
1915 opts_len -= len;
1916 };
1917
1918 key->tun_key.tun_flags |= crit_opt ? TUNNEL_CRIT_OPT : 0;
1919
1920 return 0;
1921 }
1922
1923 static int validate_and_copy_set_tun(const struct nlattr *attr,
1924 struct sw_flow_actions **sfa, bool log)
1925 {
1926 struct sw_flow_match match;
1927 struct sw_flow_key key;
1928 struct metadata_dst *tun_dst;
1929 struct ip_tunnel_info *tun_info;
1930 struct ovs_tunnel_info *ovs_tun;
1931 struct nlattr *a;
1932 int err = 0, start, opts_type;
1933
1934 ovs_match_init(&match, &key, NULL);
1935 opts_type = ip_tun_from_nlattr(nla_data(attr), &match, false, log);
1936 if (opts_type < 0)
1937 return opts_type;
1938
1939 if (key.tun_opts_len) {
1940 switch (opts_type) {
1941 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
1942 err = validate_geneve_opts(&key);
1943 if (err < 0)
1944 return err;
1945 break;
1946 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
1947 break;
1948 }
1949 };
1950
1951 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET, log);
1952 if (start < 0)
1953 return start;
1954
1955 tun_dst = metadata_dst_alloc(key.tun_opts_len, GFP_KERNEL);
1956 if (!tun_dst)
1957 return -ENOMEM;
1958
1959 a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL,
1960 sizeof(*ovs_tun), log);
1961 if (IS_ERR(a)) {
1962 dst_release((struct dst_entry *)tun_dst);
1963 return PTR_ERR(a);
1964 }
1965
1966 ovs_tun = nla_data(a);
1967 ovs_tun->tun_dst = tun_dst;
1968
1969 tun_info = &tun_dst->u.tun_info;
1970 tun_info->mode = IP_TUNNEL_INFO_TX;
1971 if (key.tun_proto == AF_INET6)
1972 tun_info->mode |= IP_TUNNEL_INFO_IPV6;
1973 tun_info->key = key.tun_key;
1974
1975 /* We need to store the options in the action itself since
1976 * everything else will go away after flow setup. We can append
1977 * it to tun_info and then point there.
1978 */
1979 ip_tunnel_info_opts_set(tun_info,
1980 TUN_METADATA_OPTS(&key, key.tun_opts_len),
1981 key.tun_opts_len);
1982 add_nested_action_end(*sfa, start);
1983
1984 return err;
1985 }
1986
1987 /* Return false if there are any non-masked bits set.
1988 * Mask follows data immediately, before any netlink padding.
1989 */
1990 static bool validate_masked(u8 *data, int len)
1991 {
1992 u8 *mask = data + len;
1993
1994 while (len--)
1995 if (*data++ & ~*mask++)
1996 return false;
1997
1998 return true;
1999 }
2000
2001 static int validate_set(const struct nlattr *a,
2002 const struct sw_flow_key *flow_key,
2003 struct sw_flow_actions **sfa,
2004 bool *skip_copy, __be16 eth_type, bool masked, bool log)
2005 {
2006 const struct nlattr *ovs_key = nla_data(a);
2007 int key_type = nla_type(ovs_key);
2008 size_t key_len;
2009
2010 /* There can be only one key in a action */
2011 if (nla_total_size(nla_len(ovs_key)) != nla_len(a))
2012 return -EINVAL;
2013
2014 key_len = nla_len(ovs_key);
2015 if (masked)
2016 key_len /= 2;
2017
2018 if (key_type > OVS_KEY_ATTR_MAX ||
2019 !check_attr_len(key_len, ovs_key_lens[key_type].len))
2020 return -EINVAL;
2021
2022 if (masked && !validate_masked(nla_data(ovs_key), key_len))
2023 return -EINVAL;
2024
2025 switch (key_type) {
2026 const struct ovs_key_ipv4 *ipv4_key;
2027 const struct ovs_key_ipv6 *ipv6_key;
2028 int err;
2029
2030 case OVS_KEY_ATTR_PRIORITY:
2031 case OVS_KEY_ATTR_SKB_MARK:
2032 case OVS_KEY_ATTR_CT_MARK:
2033 case OVS_KEY_ATTR_CT_LABELS:
2034 case OVS_KEY_ATTR_ETHERNET:
2035 break;
2036
2037 case OVS_KEY_ATTR_TUNNEL:
2038 if (eth_p_mpls(eth_type))
2039 return -EINVAL;
2040
2041 if (masked)
2042 return -EINVAL; /* Masked tunnel set not supported. */
2043
2044 *skip_copy = true;
2045 err = validate_and_copy_set_tun(a, sfa, log);
2046 if (err)
2047 return err;
2048 break;
2049
2050 case OVS_KEY_ATTR_IPV4:
2051 if (eth_type != htons(ETH_P_IP))
2052 return -EINVAL;
2053
2054 ipv4_key = nla_data(ovs_key);
2055
2056 if (masked) {
2057 const struct ovs_key_ipv4 *mask = ipv4_key + 1;
2058
2059 /* Non-writeable fields. */
2060 if (mask->ipv4_proto || mask->ipv4_frag)
2061 return -EINVAL;
2062 } else {
2063 if (ipv4_key->ipv4_proto != flow_key->ip.proto)
2064 return -EINVAL;
2065
2066 if (ipv4_key->ipv4_frag != flow_key->ip.frag)
2067 return -EINVAL;
2068 }
2069 break;
2070
2071 case OVS_KEY_ATTR_IPV6:
2072 if (eth_type != htons(ETH_P_IPV6))
2073 return -EINVAL;
2074
2075 ipv6_key = nla_data(ovs_key);
2076
2077 if (masked) {
2078 const struct ovs_key_ipv6 *mask = ipv6_key + 1;
2079
2080 /* Non-writeable fields. */
2081 if (mask->ipv6_proto || mask->ipv6_frag)
2082 return -EINVAL;
2083
2084 /* Invalid bits in the flow label mask? */
2085 if (ntohl(mask->ipv6_label) & 0xFFF00000)
2086 return -EINVAL;
2087 } else {
2088 if (ipv6_key->ipv6_proto != flow_key->ip.proto)
2089 return -EINVAL;
2090
2091 if (ipv6_key->ipv6_frag != flow_key->ip.frag)
2092 return -EINVAL;
2093 }
2094 if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000)
2095 return -EINVAL;
2096
2097 break;
2098
2099 case OVS_KEY_ATTR_TCP:
2100 if ((eth_type != htons(ETH_P_IP) &&
2101 eth_type != htons(ETH_P_IPV6)) ||
2102 flow_key->ip.proto != IPPROTO_TCP)
2103 return -EINVAL;
2104
2105 break;
2106
2107 case OVS_KEY_ATTR_UDP:
2108 if ((eth_type != htons(ETH_P_IP) &&
2109 eth_type != htons(ETH_P_IPV6)) ||
2110 flow_key->ip.proto != IPPROTO_UDP)
2111 return -EINVAL;
2112
2113 break;
2114
2115 case OVS_KEY_ATTR_MPLS:
2116 if (!eth_p_mpls(eth_type))
2117 return -EINVAL;
2118 break;
2119
2120 case OVS_KEY_ATTR_SCTP:
2121 if ((eth_type != htons(ETH_P_IP) &&
2122 eth_type != htons(ETH_P_IPV6)) ||
2123 flow_key->ip.proto != IPPROTO_SCTP)
2124 return -EINVAL;
2125
2126 break;
2127
2128 default:
2129 return -EINVAL;
2130 }
2131
2132 /* Convert non-masked non-tunnel set actions to masked set actions. */
2133 if (!masked && key_type != OVS_KEY_ATTR_TUNNEL) {
2134 int start, len = key_len * 2;
2135 struct nlattr *at;
2136
2137 *skip_copy = true;
2138
2139 start = add_nested_action_start(sfa,
2140 OVS_ACTION_ATTR_SET_TO_MASKED,
2141 log);
2142 if (start < 0)
2143 return start;
2144
2145 at = __add_action(sfa, key_type, NULL, len, log);
2146 if (IS_ERR(at))
2147 return PTR_ERR(at);
2148
2149 memcpy(nla_data(at), nla_data(ovs_key), key_len); /* Key. */
2150 memset(nla_data(at) + key_len, 0xff, key_len); /* Mask. */
2151 /* Clear non-writeable bits from otherwise writeable fields. */
2152 if (key_type == OVS_KEY_ATTR_IPV6) {
2153 struct ovs_key_ipv6 *mask = nla_data(at) + key_len;
2154
2155 mask->ipv6_label &= htonl(0x000FFFFF);
2156 }
2157 add_nested_action_end(*sfa, start);
2158 }
2159
2160 return 0;
2161 }
2162
2163 static int validate_userspace(const struct nlattr *attr)
2164 {
2165 static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = {
2166 [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 },
2167 [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC },
2168 [OVS_USERSPACE_ATTR_EGRESS_TUN_PORT] = {.type = NLA_U32 },
2169 };
2170 struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];
2171 int error;
2172
2173 error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX,
2174 attr, userspace_policy);
2175 if (error)
2176 return error;
2177
2178 if (!a[OVS_USERSPACE_ATTR_PID] ||
2179 !nla_get_u32(a[OVS_USERSPACE_ATTR_PID]))
2180 return -EINVAL;
2181
2182 return 0;
2183 }
2184
2185 static int copy_action(const struct nlattr *from,
2186 struct sw_flow_actions **sfa, bool log)
2187 {
2188 int totlen = NLA_ALIGN(from->nla_len);
2189 struct nlattr *to;
2190
2191 to = reserve_sfa_size(sfa, from->nla_len, log);
2192 if (IS_ERR(to))
2193 return PTR_ERR(to);
2194
2195 memcpy(to, from, totlen);
2196 return 0;
2197 }
2198
2199 static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
2200 const struct sw_flow_key *key,
2201 int depth, struct sw_flow_actions **sfa,
2202 __be16 eth_type, __be16 vlan_tci, bool log)
2203 {
2204 const struct nlattr *a;
2205 int rem, err;
2206
2207 if (depth >= SAMPLE_ACTION_DEPTH)
2208 return -EOVERFLOW;
2209
2210 nla_for_each_nested(a, attr, rem) {
2211 /* Expected argument lengths, (u32)-1 for variable length. */
2212 static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {
2213 [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32),
2214 [OVS_ACTION_ATTR_RECIRC] = sizeof(u32),
2215 [OVS_ACTION_ATTR_USERSPACE] = (u32)-1,
2216 [OVS_ACTION_ATTR_PUSH_MPLS] = sizeof(struct ovs_action_push_mpls),
2217 [OVS_ACTION_ATTR_POP_MPLS] = sizeof(__be16),
2218 [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan),
2219 [OVS_ACTION_ATTR_POP_VLAN] = 0,
2220 [OVS_ACTION_ATTR_SET] = (u32)-1,
2221 [OVS_ACTION_ATTR_SET_MASKED] = (u32)-1,
2222 [OVS_ACTION_ATTR_SAMPLE] = (u32)-1,
2223 [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash),
2224 [OVS_ACTION_ATTR_CT] = (u32)-1,
2225 };
2226 const struct ovs_action_push_vlan *vlan;
2227 int type = nla_type(a);
2228 bool skip_copy;
2229
2230 if (type > OVS_ACTION_ATTR_MAX ||
2231 (action_lens[type] != nla_len(a) &&
2232 action_lens[type] != (u32)-1))
2233 return -EINVAL;
2234
2235 skip_copy = false;
2236 switch (type) {
2237 case OVS_ACTION_ATTR_UNSPEC:
2238 return -EINVAL;
2239
2240 case OVS_ACTION_ATTR_USERSPACE:
2241 err = validate_userspace(a);
2242 if (err)
2243 return err;
2244 break;
2245
2246 case OVS_ACTION_ATTR_OUTPUT:
2247 if (nla_get_u32(a) >= DP_MAX_PORTS)
2248 return -EINVAL;
2249 break;
2250
2251 case OVS_ACTION_ATTR_HASH: {
2252 const struct ovs_action_hash *act_hash = nla_data(a);
2253
2254 switch (act_hash->hash_alg) {
2255 case OVS_HASH_ALG_L4:
2256 break;
2257 default:
2258 return -EINVAL;
2259 }
2260
2261 break;
2262 }
2263
2264 case OVS_ACTION_ATTR_POP_VLAN:
2265 vlan_tci = htons(0);
2266 break;
2267
2268 case OVS_ACTION_ATTR_PUSH_VLAN:
2269 vlan = nla_data(a);
2270 if (vlan->vlan_tpid != htons(ETH_P_8021Q))
2271 return -EINVAL;
2272 if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT)))
2273 return -EINVAL;
2274 vlan_tci = vlan->vlan_tci;
2275 break;
2276
2277 case OVS_ACTION_ATTR_RECIRC:
2278 break;
2279
2280 case OVS_ACTION_ATTR_PUSH_MPLS: {
2281 const struct ovs_action_push_mpls *mpls = nla_data(a);
2282
2283 if (!eth_p_mpls(mpls->mpls_ethertype))
2284 return -EINVAL;
2285 /* Prohibit push MPLS other than to a white list
2286 * for packets that have a known tag order.
2287 */
2288 if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
2289 (eth_type != htons(ETH_P_IP) &&
2290 eth_type != htons(ETH_P_IPV6) &&
2291 eth_type != htons(ETH_P_ARP) &&
2292 eth_type != htons(ETH_P_RARP) &&
2293 !eth_p_mpls(eth_type)))
2294 return -EINVAL;
2295 eth_type = mpls->mpls_ethertype;
2296 break;
2297 }
2298
2299 case OVS_ACTION_ATTR_POP_MPLS:
2300 if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
2301 !eth_p_mpls(eth_type))
2302 return -EINVAL;
2303
2304 /* Disallow subsequent L2.5+ set and mpls_pop actions
2305 * as there is no check here to ensure that the new
2306 * eth_type is valid and thus set actions could
2307 * write off the end of the packet or otherwise
2308 * corrupt it.
2309 *
2310 * Support for these actions is planned using packet
2311 * recirculation.
2312 */
2313 eth_type = htons(0);
2314 break;
2315
2316 case OVS_ACTION_ATTR_SET:
2317 err = validate_set(a, key, sfa,
2318 &skip_copy, eth_type, false, log);
2319 if (err)
2320 return err;
2321 break;
2322
2323 case OVS_ACTION_ATTR_SET_MASKED:
2324 err = validate_set(a, key, sfa,
2325 &skip_copy, eth_type, true, log);
2326 if (err)
2327 return err;
2328 break;
2329
2330 case OVS_ACTION_ATTR_SAMPLE:
2331 err = validate_and_copy_sample(net, a, key, depth, sfa,
2332 eth_type, vlan_tci, log);
2333 if (err)
2334 return err;
2335 skip_copy = true;
2336 break;
2337
2338 case OVS_ACTION_ATTR_CT:
2339 err = ovs_ct_copy_action(net, a, key, sfa, log);
2340 if (err)
2341 return err;
2342 skip_copy = true;
2343 break;
2344
2345 default:
2346 OVS_NLERR(log, "Unknown Action type %d", type);
2347 return -EINVAL;
2348 }
2349 if (!skip_copy) {
2350 err = copy_action(a, sfa, log);
2351 if (err)
2352 return err;
2353 }
2354 }
2355
2356 if (rem > 0)
2357 return -EINVAL;
2358
2359 return 0;
2360 }
2361
2362 /* 'key' must be the masked key. */
2363 int ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
2364 const struct sw_flow_key *key,
2365 struct sw_flow_actions **sfa, bool log)
2366 {
2367 int err;
2368
2369 *sfa = nla_alloc_flow_actions(min(nla_len(attr), MAX_ACTIONS_BUFSIZE));
2370 if (IS_ERR(*sfa))
2371 return PTR_ERR(*sfa);
2372
2373 (*sfa)->orig_len = nla_len(attr);
2374 err = __ovs_nla_copy_actions(net, attr, key, 0, sfa, key->eth.type,
2375 key->eth.tci, log);
2376 if (err)
2377 ovs_nla_free_flow_actions(*sfa);
2378
2379 return err;
2380 }
2381
2382 static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb)
2383 {
2384 const struct nlattr *a;
2385 struct nlattr *start;
2386 int err = 0, rem;
2387
2388 start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE);
2389 if (!start)
2390 return -EMSGSIZE;
2391
2392 nla_for_each_nested(a, attr, rem) {
2393 int type = nla_type(a);
2394 struct nlattr *st_sample;
2395
2396 switch (type) {
2397 case OVS_SAMPLE_ATTR_PROBABILITY:
2398 if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY,
2399 sizeof(u32), nla_data(a)))
2400 return -EMSGSIZE;
2401 break;
2402 case OVS_SAMPLE_ATTR_ACTIONS:
2403 st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS);
2404 if (!st_sample)
2405 return -EMSGSIZE;
2406 err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb);
2407 if (err)
2408 return err;
2409 nla_nest_end(skb, st_sample);
2410 break;
2411 }
2412 }
2413
2414 nla_nest_end(skb, start);
2415 return err;
2416 }
2417
2418 static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb)
2419 {
2420 const struct nlattr *ovs_key = nla_data(a);
2421 int key_type = nla_type(ovs_key);
2422 struct nlattr *start;
2423 int err;
2424
2425 switch (key_type) {
2426 case OVS_KEY_ATTR_TUNNEL_INFO: {
2427 struct ovs_tunnel_info *ovs_tun = nla_data(ovs_key);
2428 struct ip_tunnel_info *tun_info = &ovs_tun->tun_dst->u.tun_info;
2429
2430 start = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
2431 if (!start)
2432 return -EMSGSIZE;
2433
2434 err = ip_tun_to_nlattr(skb, &tun_info->key,
2435 ip_tunnel_info_opts(tun_info),
2436 tun_info->options_len,
2437 ip_tunnel_info_af(tun_info));
2438 if (err)
2439 return err;
2440 nla_nest_end(skb, start);
2441 break;
2442 }
2443 default:
2444 if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key))
2445 return -EMSGSIZE;
2446 break;
2447 }
2448
2449 return 0;
2450 }
2451
2452 static int masked_set_action_to_set_action_attr(const struct nlattr *a,
2453 struct sk_buff *skb)
2454 {
2455 const struct nlattr *ovs_key = nla_data(a);
2456 struct nlattr *nla;
2457 size_t key_len = nla_len(ovs_key) / 2;
2458
2459 /* Revert the conversion we did from a non-masked set action to
2460 * masked set action.
2461 */
2462 nla = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
2463 if (!nla)
2464 return -EMSGSIZE;
2465
2466 if (nla_put(skb, nla_type(ovs_key), key_len, nla_data(ovs_key)))
2467 return -EMSGSIZE;
2468
2469 nla_nest_end(skb, nla);
2470 return 0;
2471 }
2472
2473 int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb)
2474 {
2475 const struct nlattr *a;
2476 int rem, err;
2477
2478 nla_for_each_attr(a, attr, len, rem) {
2479 int type = nla_type(a);
2480
2481 switch (type) {
2482 case OVS_ACTION_ATTR_SET:
2483 err = set_action_to_attr(a, skb);
2484 if (err)
2485 return err;
2486 break;
2487
2488 case OVS_ACTION_ATTR_SET_TO_MASKED:
2489 err = masked_set_action_to_set_action_attr(a, skb);
2490 if (err)
2491 return err;
2492 break;
2493
2494 case OVS_ACTION_ATTR_SAMPLE:
2495 err = sample_action_to_attr(a, skb);
2496 if (err)
2497 return err;
2498 break;
2499
2500 case OVS_ACTION_ATTR_CT:
2501 err = ovs_ct_action_to_attr(nla_data(a), skb);
2502 if (err)
2503 return err;
2504 break;
2505
2506 default:
2507 if (nla_put(skb, type, nla_len(a), nla_data(a)))
2508 return -EMSGSIZE;
2509 break;
2510 }
2511 }
2512
2513 return 0;
2514 }
Linux with added FPC-III support