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scsi: ufs: fix race between clock gating and devfreq scaling work
[linux/fpc-iii.git] / net / openvswitch / flow_netlink.c
blob326945d9be5fa6872d6c8e68825b96fb5f2d13fc
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_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
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 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
702 static 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
719 static 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
783 static 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
804 int 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
813 static 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
836 static 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
874 static 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
916 static 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
951 static 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
974 static int metadata_from_nlattrs(struct net *net, struct sw_flow_match *match,
975 u64 *attrs, const struct nlattr **a,
976 bool is_mask, bool log)
977 {
978 if (*attrs & (1 << OVS_KEY_ATTR_DP_HASH)) {
979 u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]);
980
981 SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask);
982 *attrs &= ~(1 << OVS_KEY_ATTR_DP_HASH);
983 }
984
985 if (*attrs & (1 << OVS_KEY_ATTR_RECIRC_ID)) {
986 u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]);
987
988 SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask);
989 *attrs &= ~(1 << OVS_KEY_ATTR_RECIRC_ID);
990 }
991
992 if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) {
993 SW_FLOW_KEY_PUT(match, phy.priority,
994 nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask);
995 *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY);
996 }
997
998 if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) {
999 u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]);
1000
1001 if (is_mask) {
1002 in_port = 0xffffffff; /* Always exact match in_port. */
1003 } else if (in_port >= DP_MAX_PORTS) {
1004 OVS_NLERR(log, "Port %d exceeds max allowable %d",
1005 in_port, DP_MAX_PORTS);
1006 return -EINVAL;
1007 }
1008
1009 SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask);
1010 *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT);
1011 } else if (!is_mask) {
1012 SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask);
1013 }
1014
1015 if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) {
1016 uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]);
1017
1018 SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask);
1019 *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK);
1020 }
1021 if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) {
1022 if (ip_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match,
1023 is_mask, log) < 0)
1024 return -EINVAL;
1025 *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL);
1026 }
1027
1028 if (*attrs & (1 << OVS_KEY_ATTR_CT_STATE) &&
1029 ovs_ct_verify(net, OVS_KEY_ATTR_CT_STATE)) {
1030 u32 ct_state = nla_get_u32(a[OVS_KEY_ATTR_CT_STATE]);
1031
1032 if (ct_state & ~CT_SUPPORTED_MASK) {
1033 OVS_NLERR(log, "ct_state flags %08x unsupported",
1034 ct_state);
1035 return -EINVAL;
1036 }
1037
1038 SW_FLOW_KEY_PUT(match, ct.state, ct_state, is_mask);
1039 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_STATE);
1040 }
1041 if (*attrs & (1 << OVS_KEY_ATTR_CT_ZONE) &&
1042 ovs_ct_verify(net, OVS_KEY_ATTR_CT_ZONE)) {
1043 u16 ct_zone = nla_get_u16(a[OVS_KEY_ATTR_CT_ZONE]);
1044
1045 SW_FLOW_KEY_PUT(match, ct.zone, ct_zone, is_mask);
1046 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ZONE);
1047 }
1048 if (*attrs & (1 << OVS_KEY_ATTR_CT_MARK) &&
1049 ovs_ct_verify(net, OVS_KEY_ATTR_CT_MARK)) {
1050 u32 mark = nla_get_u32(a[OVS_KEY_ATTR_CT_MARK]);
1051
1052 SW_FLOW_KEY_PUT(match, ct.mark, mark, is_mask);
1053 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_MARK);
1054 }
1055 if (*attrs & (1 << OVS_KEY_ATTR_CT_LABELS) &&
1056 ovs_ct_verify(net, OVS_KEY_ATTR_CT_LABELS)) {
1057 const struct ovs_key_ct_labels *cl;
1058
1059 cl = nla_data(a[OVS_KEY_ATTR_CT_LABELS]);
1060 SW_FLOW_KEY_MEMCPY(match, ct.labels, cl->ct_labels,
1061 sizeof(*cl), is_mask);
1062 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_LABELS);
1063 }
1064 return 0;
1065 }
1066
1067 static int ovs_key_from_nlattrs(struct net *net, struct sw_flow_match *match,
1068 u64 attrs, const struct nlattr **a,
1069 bool is_mask, bool log)
1070 {
1071 int err;
1072
1073 err = metadata_from_nlattrs(net, match, &attrs, a, is_mask, log);
1074 if (err)
1075 return err;
1076
1077 if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) {
1078 const struct ovs_key_ethernet *eth_key;
1079
1080 eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]);
1081 SW_FLOW_KEY_MEMCPY(match, eth.src,
1082 eth_key->eth_src, ETH_ALEN, is_mask);
1083 SW_FLOW_KEY_MEMCPY(match, eth.dst,
1084 eth_key->eth_dst, ETH_ALEN, is_mask);
1085 attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET);
1086 }
1087
1088 if (attrs & (1 << OVS_KEY_ATTR_VLAN)) {
1089 /* VLAN attribute is always parsed before getting here since it
1090 * may occur multiple times.
1091 */
1092 OVS_NLERR(log, "VLAN attribute unexpected.");
1093 return -EINVAL;
1094 }
1095
1096 if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) {
1097 __be16 eth_type;
1098
1099 eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
1100 if (is_mask) {
1101 /* Always exact match EtherType. */
1102 eth_type = htons(0xffff);
1103 } else if (!eth_proto_is_802_3(eth_type)) {
1104 OVS_NLERR(log, "EtherType %x is less than min %x",
1105 ntohs(eth_type), ETH_P_802_3_MIN);
1106 return -EINVAL;
1107 }
1108
1109 SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask);
1110 attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
1111 } else if (!is_mask) {
1112 SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask);
1113 }
1114
1115 if (attrs & (1 << OVS_KEY_ATTR_IPV4)) {
1116 const struct ovs_key_ipv4 *ipv4_key;
1117
1118 ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]);
1119 if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) {
1120 OVS_NLERR(log, "IPv4 frag type %d is out of range max %d",
1121 ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX);
1122 return -EINVAL;
1123 }
1124 SW_FLOW_KEY_PUT(match, ip.proto,
1125 ipv4_key->ipv4_proto, is_mask);
1126 SW_FLOW_KEY_PUT(match, ip.tos,
1127 ipv4_key->ipv4_tos, is_mask);
1128 SW_FLOW_KEY_PUT(match, ip.ttl,
1129 ipv4_key->ipv4_ttl, is_mask);
1130 SW_FLOW_KEY_PUT(match, ip.frag,
1131 ipv4_key->ipv4_frag, is_mask);
1132 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
1133 ipv4_key->ipv4_src, is_mask);
1134 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
1135 ipv4_key->ipv4_dst, is_mask);
1136 attrs &= ~(1 << OVS_KEY_ATTR_IPV4);
1137 }
1138
1139 if (attrs & (1 << OVS_KEY_ATTR_IPV6)) {
1140 const struct ovs_key_ipv6 *ipv6_key;
1141
1142 ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]);
1143 if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) {
1144 OVS_NLERR(log, "IPv6 frag type %d is out of range max %d",
1145 ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX);
1146 return -EINVAL;
1147 }
1148
1149 if (!is_mask && ipv6_key->ipv6_label & htonl(0xFFF00000)) {
1150 OVS_NLERR(log, "IPv6 flow label %x is out of range (max=%x).\n",
1151 ntohl(ipv6_key->ipv6_label), (1 << 20) - 1);
1152 return -EINVAL;
1153 }
1154
1155 SW_FLOW_KEY_PUT(match, ipv6.label,
1156 ipv6_key->ipv6_label, is_mask);
1157 SW_FLOW_KEY_PUT(match, ip.proto,
1158 ipv6_key->ipv6_proto, is_mask);
1159 SW_FLOW_KEY_PUT(match, ip.tos,
1160 ipv6_key->ipv6_tclass, is_mask);
1161 SW_FLOW_KEY_PUT(match, ip.ttl,
1162 ipv6_key->ipv6_hlimit, is_mask);
1163 SW_FLOW_KEY_PUT(match, ip.frag,
1164 ipv6_key->ipv6_frag, is_mask);
1165 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src,
1166 ipv6_key->ipv6_src,
1167 sizeof(match->key->ipv6.addr.src),
1168 is_mask);
1169 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst,
1170 ipv6_key->ipv6_dst,
1171 sizeof(match->key->ipv6.addr.dst),
1172 is_mask);
1173
1174 attrs &= ~(1 << OVS_KEY_ATTR_IPV6);
1175 }
1176
1177 if (attrs & (1 << OVS_KEY_ATTR_ARP)) {
1178 const struct ovs_key_arp *arp_key;
1179
1180 arp_key = nla_data(a[OVS_KEY_ATTR_ARP]);
1181 if (!is_mask && (arp_key->arp_op & htons(0xff00))) {
1182 OVS_NLERR(log, "Unknown ARP opcode (opcode=%d).",
1183 arp_key->arp_op);
1184 return -EINVAL;
1185 }
1186
1187 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
1188 arp_key->arp_sip, is_mask);
1189 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
1190 arp_key->arp_tip, is_mask);
1191 SW_FLOW_KEY_PUT(match, ip.proto,
1192 ntohs(arp_key->arp_op), is_mask);
1193 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha,
1194 arp_key->arp_sha, ETH_ALEN, is_mask);
1195 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha,
1196 arp_key->arp_tha, ETH_ALEN, is_mask);
1197
1198 attrs &= ~(1 << OVS_KEY_ATTR_ARP);
1199 }
1200
1201 if (attrs & (1 << OVS_KEY_ATTR_MPLS)) {
1202 const struct ovs_key_mpls *mpls_key;
1203
1204 mpls_key = nla_data(a[OVS_KEY_ATTR_MPLS]);
1205 SW_FLOW_KEY_PUT(match, mpls.top_lse,
1206 mpls_key->mpls_lse, is_mask);
1207
1208 attrs &= ~(1 << OVS_KEY_ATTR_MPLS);
1209 }
1210
1211 if (attrs & (1 << OVS_KEY_ATTR_TCP)) {
1212 const struct ovs_key_tcp *tcp_key;
1213
1214 tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]);
1215 SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask);
1216 SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask);
1217 attrs &= ~(1 << OVS_KEY_ATTR_TCP);
1218 }
1219
1220 if (attrs & (1 << OVS_KEY_ATTR_TCP_FLAGS)) {
1221 SW_FLOW_KEY_PUT(match, tp.flags,
1222 nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]),
1223 is_mask);
1224 attrs &= ~(1 << OVS_KEY_ATTR_TCP_FLAGS);
1225 }
1226
1227 if (attrs & (1 << OVS_KEY_ATTR_UDP)) {
1228 const struct ovs_key_udp *udp_key;
1229
1230 udp_key = nla_data(a[OVS_KEY_ATTR_UDP]);
1231 SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask);
1232 SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask);
1233 attrs &= ~(1 << OVS_KEY_ATTR_UDP);
1234 }
1235
1236 if (attrs & (1 << OVS_KEY_ATTR_SCTP)) {
1237 const struct ovs_key_sctp *sctp_key;
1238
1239 sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]);
1240 SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask);
1241 SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask);
1242 attrs &= ~(1 << OVS_KEY_ATTR_SCTP);
1243 }
1244
1245 if (attrs & (1 << OVS_KEY_ATTR_ICMP)) {
1246 const struct ovs_key_icmp *icmp_key;
1247
1248 icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]);
1249 SW_FLOW_KEY_PUT(match, tp.src,
1250 htons(icmp_key->icmp_type), is_mask);
1251 SW_FLOW_KEY_PUT(match, tp.dst,
1252 htons(icmp_key->icmp_code), is_mask);
1253 attrs &= ~(1 << OVS_KEY_ATTR_ICMP);
1254 }
1255
1256 if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) {
1257 const struct ovs_key_icmpv6 *icmpv6_key;
1258
1259 icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]);
1260 SW_FLOW_KEY_PUT(match, tp.src,
1261 htons(icmpv6_key->icmpv6_type), is_mask);
1262 SW_FLOW_KEY_PUT(match, tp.dst,
1263 htons(icmpv6_key->icmpv6_code), is_mask);
1264 attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6);
1265 }
1266
1267 if (attrs & (1 << OVS_KEY_ATTR_ND)) {
1268 const struct ovs_key_nd *nd_key;
1269
1270 nd_key = nla_data(a[OVS_KEY_ATTR_ND]);
1271 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target,
1272 nd_key->nd_target,
1273 sizeof(match->key->ipv6.nd.target),
1274 is_mask);
1275 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll,
1276 nd_key->nd_sll, ETH_ALEN, is_mask);
1277 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll,
1278 nd_key->nd_tll, ETH_ALEN, is_mask);
1279 attrs &= ~(1 << OVS_KEY_ATTR_ND);
1280 }
1281
1282 if (attrs != 0) {
1283 OVS_NLERR(log, "Unknown key attributes %llx",
1284 (unsigned long long)attrs);
1285 return -EINVAL;
1286 }
1287
1288 return 0;
1289 }
1290
1291 static void nlattr_set(struct nlattr *attr, u8 val,
1292 const struct ovs_len_tbl *tbl)
1293 {
1294 struct nlattr *nla;
1295 int rem;
1296
1297 /* The nlattr stream should already have been validated */
1298 nla_for_each_nested(nla, attr, rem) {
1299 if (tbl[nla_type(nla)].len == OVS_ATTR_NESTED)
1300 nlattr_set(nla, val, tbl[nla_type(nla)].next ? : tbl);
1301 else
1302 memset(nla_data(nla), val, nla_len(nla));
1303
1304 if (nla_type(nla) == OVS_KEY_ATTR_CT_STATE)
1305 *(u32 *)nla_data(nla) &= CT_SUPPORTED_MASK;
1306 }
1307 }
1308
1309 static void mask_set_nlattr(struct nlattr *attr, u8 val)
1310 {
1311 nlattr_set(attr, val, ovs_key_lens);
1312 }
1313
1314 /**
1315 * ovs_nla_get_match - parses Netlink attributes into a flow key and
1316 * mask. In case the 'mask' is NULL, the flow is treated as exact match
1317 * flow. Otherwise, it is treated as a wildcarded flow, except the mask
1318 * does not include any don't care bit.
1319 * @net: Used to determine per-namespace field support.
1320 * @match: receives the extracted flow match information.
1321 * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
1322 * sequence. The fields should of the packet that triggered the creation
1323 * of this flow.
1324 * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink
1325 * attribute specifies the mask field of the wildcarded flow.
1326 * @log: Boolean to allow kernel error logging. Normally true, but when
1327 * probing for feature compatibility this should be passed in as false to
1328 * suppress unnecessary error logging.
1329 */
1330 int ovs_nla_get_match(struct net *net, struct sw_flow_match *match,
1331 const struct nlattr *nla_key,
1332 const struct nlattr *nla_mask,
1333 bool log)
1334 {
1335 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
1336 struct nlattr *newmask = NULL;
1337 u64 key_attrs = 0;
1338 u64 mask_attrs = 0;
1339 int err;
1340
1341 err = parse_flow_nlattrs(nla_key, a, &key_attrs, log);
1342 if (err)
1343 return err;
1344
1345 err = parse_vlan_from_nlattrs(match, &key_attrs, a, false, log);
1346 if (err)
1347 return err;
1348
1349 err = ovs_key_from_nlattrs(net, match, key_attrs, a, false, log);
1350 if (err)
1351 return err;
1352
1353 if (match->mask) {
1354 if (!nla_mask) {
1355 /* Create an exact match mask. We need to set to 0xff
1356 * all the 'match->mask' fields that have been touched
1357 * in 'match->key'. We cannot simply memset
1358 * 'match->mask', because padding bytes and fields not
1359 * specified in 'match->key' should be left to 0.
1360 * Instead, we use a stream of netlink attributes,
1361 * copied from 'key' and set to 0xff.
1362 * ovs_key_from_nlattrs() will take care of filling
1363 * 'match->mask' appropriately.
1364 */
1365 newmask = kmemdup(nla_key,
1366 nla_total_size(nla_len(nla_key)),
1367 GFP_KERNEL);
1368 if (!newmask)
1369 return -ENOMEM;
1370
1371 mask_set_nlattr(newmask, 0xff);
1372
1373 /* The userspace does not send tunnel attributes that
1374 * are 0, but we should not wildcard them nonetheless.
1375 */
1376 if (match->key->tun_proto)
1377 SW_FLOW_KEY_MEMSET_FIELD(match, tun_key,
1378 0xff, true);
1379
1380 nla_mask = newmask;
1381 }
1382
1383 err = parse_flow_mask_nlattrs(nla_mask, a, &mask_attrs, log);
1384 if (err)
1385 goto free_newmask;
1386
1387 /* Always match on tci. */
1388 SW_FLOW_KEY_PUT(match, eth.vlan.tci, htons(0xffff), true);
1389 SW_FLOW_KEY_PUT(match, eth.cvlan.tci, htons(0xffff), true);
1390
1391 err = parse_vlan_from_nlattrs(match, &mask_attrs, a, true, log);
1392 if (err)
1393 goto free_newmask;
1394
1395 err = ovs_key_from_nlattrs(net, match, mask_attrs, a, true,
1396 log);
1397 if (err)
1398 goto free_newmask;
1399 }
1400
1401 if (!match_validate(match, key_attrs, mask_attrs, log))
1402 err = -EINVAL;
1403
1404 free_newmask:
1405 kfree(newmask);
1406 return err;
1407 }
1408
1409 static size_t get_ufid_len(const struct nlattr *attr, bool log)
1410 {
1411 size_t len;
1412
1413 if (!attr)
1414 return 0;
1415
1416 len = nla_len(attr);
1417 if (len < 1 || len > MAX_UFID_LENGTH) {
1418 OVS_NLERR(log, "ufid size %u bytes exceeds the range (1, %d)",
1419 nla_len(attr), MAX_UFID_LENGTH);
1420 return 0;
1421 }
1422
1423 return len;
1424 }
1425
1426 /* Initializes 'flow->ufid', returning true if 'attr' contains a valid UFID,
1427 * or false otherwise.
1428 */
1429 bool ovs_nla_get_ufid(struct sw_flow_id *sfid, const struct nlattr *attr,
1430 bool log)
1431 {
1432 sfid->ufid_len = get_ufid_len(attr, log);
1433 if (sfid->ufid_len)
1434 memcpy(sfid->ufid, nla_data(attr), sfid->ufid_len);
1435
1436 return sfid->ufid_len;
1437 }
1438
1439 int ovs_nla_get_identifier(struct sw_flow_id *sfid, const struct nlattr *ufid,
1440 const struct sw_flow_key *key, bool log)
1441 {
1442 struct sw_flow_key *new_key;
1443
1444 if (ovs_nla_get_ufid(sfid, ufid, log))
1445 return 0;
1446
1447 /* If UFID was not provided, use unmasked key. */
1448 new_key = kmalloc(sizeof(*new_key), GFP_KERNEL);
1449 if (!new_key)
1450 return -ENOMEM;
1451 memcpy(new_key, key, sizeof(*key));
1452 sfid->unmasked_key = new_key;
1453
1454 return 0;
1455 }
1456
1457 u32 ovs_nla_get_ufid_flags(const struct nlattr *attr)
1458 {
1459 return attr ? nla_get_u32(attr) : 0;
1460 }
1461
1462 /**
1463 * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key.
1464 * @key: Receives extracted in_port, priority, tun_key and skb_mark.
1465 * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
1466 * sequence.
1467 * @log: Boolean to allow kernel error logging. Normally true, but when
1468 * probing for feature compatibility this should be passed in as false to
1469 * suppress unnecessary error logging.
1470 *
1471 * This parses a series of Netlink attributes that form a flow key, which must
1472 * take the same form accepted by flow_from_nlattrs(), but only enough of it to
1473 * get the metadata, that is, the parts of the flow key that cannot be
1474 * extracted from the packet itself.
1475 */
1476
1477 int ovs_nla_get_flow_metadata(struct net *net, const struct nlattr *attr,
1478 struct sw_flow_key *key,
1479 bool log)
1480 {
1481 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
1482 struct sw_flow_match match;
1483 u64 attrs = 0;
1484 int err;
1485
1486 err = parse_flow_nlattrs(attr, a, &attrs, log);
1487 if (err)
1488 return -EINVAL;
1489
1490 memset(&match, 0, sizeof(match));
1491 match.key = key;
1492
1493 memset(&key->ct, 0, sizeof(key->ct));
1494 key->phy.in_port = DP_MAX_PORTS;
1495
1496 return metadata_from_nlattrs(net, &match, &attrs, a, false, log);
1497 }
1498
1499 static int ovs_nla_put_vlan(struct sk_buff *skb, const struct vlan_head *vh,
1500 bool is_mask)
1501 {
1502 __be16 eth_type = !is_mask ? vh->tpid : htons(0xffff);
1503
1504 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) ||
1505 nla_put_be16(skb, OVS_KEY_ATTR_VLAN, vh->tci))
1506 return -EMSGSIZE;
1507 return 0;
1508 }
1509
1510 static int __ovs_nla_put_key(const struct sw_flow_key *swkey,
1511 const struct sw_flow_key *output, bool is_mask,
1512 struct sk_buff *skb)
1513 {
1514 struct ovs_key_ethernet *eth_key;
1515 struct nlattr *nla;
1516 struct nlattr *encap = NULL;
1517 struct nlattr *in_encap = NULL;
1518
1519 if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id))
1520 goto nla_put_failure;
1521
1522 if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash))
1523 goto nla_put_failure;
1524
1525 if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority))
1526 goto nla_put_failure;
1527
1528 if ((swkey->tun_proto || is_mask)) {
1529 const void *opts = NULL;
1530
1531 if (output->tun_key.tun_flags & TUNNEL_OPTIONS_PRESENT)
1532 opts = TUN_METADATA_OPTS(output, swkey->tun_opts_len);
1533
1534 if (ip_tun_to_nlattr(skb, &output->tun_key, opts,
1535 swkey->tun_opts_len, swkey->tun_proto))
1536 goto nla_put_failure;
1537 }
1538
1539 if (swkey->phy.in_port == DP_MAX_PORTS) {
1540 if (is_mask && (output->phy.in_port == 0xffff))
1541 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff))
1542 goto nla_put_failure;
1543 } else {
1544 u16 upper_u16;
1545 upper_u16 = !is_mask ? 0 : 0xffff;
1546
1547 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT,
1548 (upper_u16 << 16) | output->phy.in_port))
1549 goto nla_put_failure;
1550 }
1551
1552 if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark))
1553 goto nla_put_failure;
1554
1555 if (ovs_ct_put_key(output, skb))
1556 goto nla_put_failure;
1557
1558 nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key));
1559 if (!nla)
1560 goto nla_put_failure;
1561
1562 eth_key = nla_data(nla);
1563 ether_addr_copy(eth_key->eth_src, output->eth.src);
1564 ether_addr_copy(eth_key->eth_dst, output->eth.dst);
1565
1566 if (swkey->eth.vlan.tci || eth_type_vlan(swkey->eth.type)) {
1567 if (ovs_nla_put_vlan(skb, &output->eth.vlan, is_mask))
1568 goto nla_put_failure;
1569 encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
1570 if (!swkey->eth.vlan.tci)
1571 goto unencap;
1572
1573 if (swkey->eth.cvlan.tci || eth_type_vlan(swkey->eth.type)) {
1574 if (ovs_nla_put_vlan(skb, &output->eth.cvlan, is_mask))
1575 goto nla_put_failure;
1576 in_encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
1577 if (!swkey->eth.cvlan.tci)
1578 goto unencap;
1579 }
1580 }
1581
1582 if (swkey->eth.type == htons(ETH_P_802_2)) {
1583 /*
1584 * Ethertype 802.2 is represented in the netlink with omitted
1585 * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and
1586 * 0xffff in the mask attribute. Ethertype can also
1587 * be wildcarded.
1588 */
1589 if (is_mask && output->eth.type)
1590 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE,
1591 output->eth.type))
1592 goto nla_put_failure;
1593 goto unencap;
1594 }
1595
1596 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type))
1597 goto nla_put_failure;
1598
1599 if (eth_type_vlan(swkey->eth.type)) {
1600 /* There are 3 VLAN tags, we don't know anything about the rest
1601 * of the packet, so truncate here.
1602 */
1603 WARN_ON_ONCE(!(encap && in_encap));
1604 goto unencap;
1605 }
1606
1607 if (swkey->eth.type == htons(ETH_P_IP)) {
1608 struct ovs_key_ipv4 *ipv4_key;
1609
1610 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key));
1611 if (!nla)
1612 goto nla_put_failure;
1613 ipv4_key = nla_data(nla);
1614 ipv4_key->ipv4_src = output->ipv4.addr.src;
1615 ipv4_key->ipv4_dst = output->ipv4.addr.dst;
1616 ipv4_key->ipv4_proto = output->ip.proto;
1617 ipv4_key->ipv4_tos = output->ip.tos;
1618 ipv4_key->ipv4_ttl = output->ip.ttl;
1619 ipv4_key->ipv4_frag = output->ip.frag;
1620 } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
1621 struct ovs_key_ipv6 *ipv6_key;
1622
1623 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key));
1624 if (!nla)
1625 goto nla_put_failure;
1626 ipv6_key = nla_data(nla);
1627 memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src,
1628 sizeof(ipv6_key->ipv6_src));
1629 memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst,
1630 sizeof(ipv6_key->ipv6_dst));
1631 ipv6_key->ipv6_label = output->ipv6.label;
1632 ipv6_key->ipv6_proto = output->ip.proto;
1633 ipv6_key->ipv6_tclass = output->ip.tos;
1634 ipv6_key->ipv6_hlimit = output->ip.ttl;
1635 ipv6_key->ipv6_frag = output->ip.frag;
1636 } else if (swkey->eth.type == htons(ETH_P_ARP) ||
1637 swkey->eth.type == htons(ETH_P_RARP)) {
1638 struct ovs_key_arp *arp_key;
1639
1640 nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key));
1641 if (!nla)
1642 goto nla_put_failure;
1643 arp_key = nla_data(nla);
1644 memset(arp_key, 0, sizeof(struct ovs_key_arp));
1645 arp_key->arp_sip = output->ipv4.addr.src;
1646 arp_key->arp_tip = output->ipv4.addr.dst;
1647 arp_key->arp_op = htons(output->ip.proto);
1648 ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha);
1649 ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha);
1650 } else if (eth_p_mpls(swkey->eth.type)) {
1651 struct ovs_key_mpls *mpls_key;
1652
1653 nla = nla_reserve(skb, OVS_KEY_ATTR_MPLS, sizeof(*mpls_key));
1654 if (!nla)
1655 goto nla_put_failure;
1656 mpls_key = nla_data(nla);
1657 mpls_key->mpls_lse = output->mpls.top_lse;
1658 }
1659
1660 if ((swkey->eth.type == htons(ETH_P_IP) ||
1661 swkey->eth.type == htons(ETH_P_IPV6)) &&
1662 swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
1663
1664 if (swkey->ip.proto == IPPROTO_TCP) {
1665 struct ovs_key_tcp *tcp_key;
1666
1667 nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key));
1668 if (!nla)
1669 goto nla_put_failure;
1670 tcp_key = nla_data(nla);
1671 tcp_key->tcp_src = output->tp.src;
1672 tcp_key->tcp_dst = output->tp.dst;
1673 if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS,
1674 output->tp.flags))
1675 goto nla_put_failure;
1676 } else if (swkey->ip.proto == IPPROTO_UDP) {
1677 struct ovs_key_udp *udp_key;
1678
1679 nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key));
1680 if (!nla)
1681 goto nla_put_failure;
1682 udp_key = nla_data(nla);
1683 udp_key->udp_src = output->tp.src;
1684 udp_key->udp_dst = output->tp.dst;
1685 } else if (swkey->ip.proto == IPPROTO_SCTP) {
1686 struct ovs_key_sctp *sctp_key;
1687
1688 nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key));
1689 if (!nla)
1690 goto nla_put_failure;
1691 sctp_key = nla_data(nla);
1692 sctp_key->sctp_src = output->tp.src;
1693 sctp_key->sctp_dst = output->tp.dst;
1694 } else if (swkey->eth.type == htons(ETH_P_IP) &&
1695 swkey->ip.proto == IPPROTO_ICMP) {
1696 struct ovs_key_icmp *icmp_key;
1697
1698 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key));
1699 if (!nla)
1700 goto nla_put_failure;
1701 icmp_key = nla_data(nla);
1702 icmp_key->icmp_type = ntohs(output->tp.src);
1703 icmp_key->icmp_code = ntohs(output->tp.dst);
1704 } else if (swkey->eth.type == htons(ETH_P_IPV6) &&
1705 swkey->ip.proto == IPPROTO_ICMPV6) {
1706 struct ovs_key_icmpv6 *icmpv6_key;
1707
1708 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6,
1709 sizeof(*icmpv6_key));
1710 if (!nla)
1711 goto nla_put_failure;
1712 icmpv6_key = nla_data(nla);
1713 icmpv6_key->icmpv6_type = ntohs(output->tp.src);
1714 icmpv6_key->icmpv6_code = ntohs(output->tp.dst);
1715
1716 if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION ||
1717 icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) {
1718 struct ovs_key_nd *nd_key;
1719
1720 nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key));
1721 if (!nla)
1722 goto nla_put_failure;
1723 nd_key = nla_data(nla);
1724 memcpy(nd_key->nd_target, &output->ipv6.nd.target,
1725 sizeof(nd_key->nd_target));
1726 ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll);
1727 ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll);
1728 }
1729 }
1730 }
1731
1732 unencap:
1733 if (in_encap)
1734 nla_nest_end(skb, in_encap);
1735 if (encap)
1736 nla_nest_end(skb, encap);
1737
1738 return 0;
1739
1740 nla_put_failure:
1741 return -EMSGSIZE;
1742 }
1743
1744 int ovs_nla_put_key(const struct sw_flow_key *swkey,
1745 const struct sw_flow_key *output, int attr, bool is_mask,
1746 struct sk_buff *skb)
1747 {
1748 int err;
1749 struct nlattr *nla;
1750
1751 nla = nla_nest_start(skb, attr);
1752 if (!nla)
1753 return -EMSGSIZE;
1754 err = __ovs_nla_put_key(swkey, output, is_mask, skb);
1755 if (err)
1756 return err;
1757 nla_nest_end(skb, nla);
1758
1759 return 0;
1760 }
1761
1762 /* Called with ovs_mutex or RCU read lock. */
1763 int ovs_nla_put_identifier(const struct sw_flow *flow, struct sk_buff *skb)
1764 {
1765 if (ovs_identifier_is_ufid(&flow->id))
1766 return nla_put(skb, OVS_FLOW_ATTR_UFID, flow->id.ufid_len,
1767 flow->id.ufid);
1768
1769 return ovs_nla_put_key(flow->id.unmasked_key, flow->id.unmasked_key,
1770 OVS_FLOW_ATTR_KEY, false, skb);
1771 }
1772
1773 /* Called with ovs_mutex or RCU read lock. */
1774 int ovs_nla_put_masked_key(const struct sw_flow *flow, struct sk_buff *skb)
1775 {
1776 return ovs_nla_put_key(&flow->key, &flow->key,
1777 OVS_FLOW_ATTR_KEY, false, skb);
1778 }
1779
1780 /* Called with ovs_mutex or RCU read lock. */
1781 int ovs_nla_put_mask(const struct sw_flow *flow, struct sk_buff *skb)
1782 {
1783 return ovs_nla_put_key(&flow->key, &flow->mask->key,
1784 OVS_FLOW_ATTR_MASK, true, skb);
1785 }
1786
1787 #define MAX_ACTIONS_BUFSIZE (32 * 1024)
1788
1789 static struct sw_flow_actions *nla_alloc_flow_actions(int size)
1790 {
1791 struct sw_flow_actions *sfa;
1792
1793 WARN_ON_ONCE(size > MAX_ACTIONS_BUFSIZE);
1794
1795 sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL);
1796 if (!sfa)
1797 return ERR_PTR(-ENOMEM);
1798
1799 sfa->actions_len = 0;
1800 return sfa;
1801 }
1802
1803 static void ovs_nla_free_set_action(const struct nlattr *a)
1804 {
1805 const struct nlattr *ovs_key = nla_data(a);
1806 struct ovs_tunnel_info *ovs_tun;
1807
1808 switch (nla_type(ovs_key)) {
1809 case OVS_KEY_ATTR_TUNNEL_INFO:
1810 ovs_tun = nla_data(ovs_key);
1811 dst_release((struct dst_entry *)ovs_tun->tun_dst);
1812 break;
1813 }
1814 }
1815
1816 void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts)
1817 {
1818 const struct nlattr *a;
1819 int rem;
1820
1821 if (!sf_acts)
1822 return;
1823
1824 nla_for_each_attr(a, sf_acts->actions, sf_acts->actions_len, rem) {
1825 switch (nla_type(a)) {
1826 case OVS_ACTION_ATTR_SET:
1827 ovs_nla_free_set_action(a);
1828 break;
1829 case OVS_ACTION_ATTR_CT:
1830 ovs_ct_free_action(a);
1831 break;
1832 }
1833 }
1834
1835 kfree(sf_acts);
1836 }
1837
1838 static void __ovs_nla_free_flow_actions(struct rcu_head *head)
1839 {
1840 ovs_nla_free_flow_actions(container_of(head, struct sw_flow_actions, rcu));
1841 }
1842
1843 /* Schedules 'sf_acts' to be freed after the next RCU grace period.
1844 * The caller must hold rcu_read_lock for this to be sensible. */
1845 void ovs_nla_free_flow_actions_rcu(struct sw_flow_actions *sf_acts)
1846 {
1847 call_rcu(&sf_acts->rcu, __ovs_nla_free_flow_actions);
1848 }
1849
1850 static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa,
1851 int attr_len, bool log)
1852 {
1853
1854 struct sw_flow_actions *acts;
1855 int new_acts_size;
1856 int req_size = NLA_ALIGN(attr_len);
1857 int next_offset = offsetof(struct sw_flow_actions, actions) +
1858 (*sfa)->actions_len;
1859
1860 if (req_size <= (ksize(*sfa) - next_offset))
1861 goto out;
1862
1863 new_acts_size = ksize(*sfa) * 2;
1864
1865 if (new_acts_size > MAX_ACTIONS_BUFSIZE) {
1866 if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size) {
1867 OVS_NLERR(log, "Flow action size exceeds max %u",
1868 MAX_ACTIONS_BUFSIZE);
1869 return ERR_PTR(-EMSGSIZE);
1870 }
1871 new_acts_size = MAX_ACTIONS_BUFSIZE;
1872 }
1873
1874 acts = nla_alloc_flow_actions(new_acts_size);
1875 if (IS_ERR(acts))
1876 return (void *)acts;
1877
1878 memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len);
1879 acts->actions_len = (*sfa)->actions_len;
1880 acts->orig_len = (*sfa)->orig_len;
1881 kfree(*sfa);
1882 *sfa = acts;
1883
1884 out:
1885 (*sfa)->actions_len += req_size;
1886 return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset);
1887 }
1888
1889 static struct nlattr *__add_action(struct sw_flow_actions **sfa,
1890 int attrtype, void *data, int len, bool log)
1891 {
1892 struct nlattr *a;
1893
1894 a = reserve_sfa_size(sfa, nla_attr_size(len), log);
1895 if (IS_ERR(a))
1896 return a;
1897
1898 a->nla_type = attrtype;
1899 a->nla_len = nla_attr_size(len);
1900
1901 if (data)
1902 memcpy(nla_data(a), data, len);
1903 memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len));
1904
1905 return a;
1906 }
1907
1908 int ovs_nla_add_action(struct sw_flow_actions **sfa, int attrtype, void *data,
1909 int len, bool log)
1910 {
1911 struct nlattr *a;
1912
1913 a = __add_action(sfa, attrtype, data, len, log);
1914
1915 return PTR_ERR_OR_ZERO(a);
1916 }
1917
1918 static inline int add_nested_action_start(struct sw_flow_actions **sfa,
1919 int attrtype, bool log)
1920 {
1921 int used = (*sfa)->actions_len;
1922 int err;
1923
1924 err = ovs_nla_add_action(sfa, attrtype, NULL, 0, log);
1925 if (err)
1926 return err;
1927
1928 return used;
1929 }
1930
1931 static inline void add_nested_action_end(struct sw_flow_actions *sfa,
1932 int st_offset)
1933 {
1934 struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions +
1935 st_offset);
1936
1937 a->nla_len = sfa->actions_len - st_offset;
1938 }
1939
1940 static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
1941 const struct sw_flow_key *key,
1942 int depth, struct sw_flow_actions **sfa,
1943 __be16 eth_type, __be16 vlan_tci, bool log);
1944
1945 static int validate_and_copy_sample(struct net *net, const struct nlattr *attr,
1946 const struct sw_flow_key *key, int depth,
1947 struct sw_flow_actions **sfa,
1948 __be16 eth_type, __be16 vlan_tci, bool log)
1949 {
1950 const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];
1951 const struct nlattr *probability, *actions;
1952 const struct nlattr *a;
1953 int rem, start, err, st_acts;
1954
1955 memset(attrs, 0, sizeof(attrs));
1956 nla_for_each_nested(a, attr, rem) {
1957 int type = nla_type(a);
1958 if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type])
1959 return -EINVAL;
1960 attrs[type] = a;
1961 }
1962 if (rem)
1963 return -EINVAL;
1964
1965 probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY];
1966 if (!probability || nla_len(probability) != sizeof(u32))
1967 return -EINVAL;
1968
1969 actions = attrs[OVS_SAMPLE_ATTR_ACTIONS];
1970 if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN))
1971 return -EINVAL;
1972
1973 /* validation done, copy sample action. */
1974 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE, log);
1975 if (start < 0)
1976 return start;
1977 err = ovs_nla_add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY,
1978 nla_data(probability), sizeof(u32), log);
1979 if (err)
1980 return err;
1981 st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS, log);
1982 if (st_acts < 0)
1983 return st_acts;
1984
1985 err = __ovs_nla_copy_actions(net, actions, key, depth + 1, sfa,
1986 eth_type, vlan_tci, log);
1987 if (err)
1988 return err;
1989
1990 add_nested_action_end(*sfa, st_acts);
1991 add_nested_action_end(*sfa, start);
1992
1993 return 0;
1994 }
1995
1996 void ovs_match_init(struct sw_flow_match *match,
1997 struct sw_flow_key *key,
1998 bool reset_key,
1999 struct sw_flow_mask *mask)
2000 {
2001 memset(match, 0, sizeof(*match));
2002 match->key = key;
2003 match->mask = mask;
2004
2005 if (reset_key)
2006 memset(key, 0, sizeof(*key));
2007
2008 if (mask) {
2009 memset(&mask->key, 0, sizeof(mask->key));
2010 mask->range.start = mask->range.end = 0;
2011 }
2012 }
2013
2014 static int validate_geneve_opts(struct sw_flow_key *key)
2015 {
2016 struct geneve_opt *option;
2017 int opts_len = key->tun_opts_len;
2018 bool crit_opt = false;
2019
2020 option = (struct geneve_opt *)TUN_METADATA_OPTS(key, key->tun_opts_len);
2021 while (opts_len > 0) {
2022 int len;
2023
2024 if (opts_len < sizeof(*option))
2025 return -EINVAL;
2026
2027 len = sizeof(*option) + option->length * 4;
2028 if (len > opts_len)
2029 return -EINVAL;
2030
2031 crit_opt |= !!(option->type & GENEVE_CRIT_OPT_TYPE);
2032
2033 option = (struct geneve_opt *)((u8 *)option + len);
2034 opts_len -= len;
2035 };
2036
2037 key->tun_key.tun_flags |= crit_opt ? TUNNEL_CRIT_OPT : 0;
2038
2039 return 0;
2040 }
2041
2042 static int validate_and_copy_set_tun(const struct nlattr *attr,
2043 struct sw_flow_actions **sfa, bool log)
2044 {
2045 struct sw_flow_match match;
2046 struct sw_flow_key key;
2047 struct metadata_dst *tun_dst;
2048 struct ip_tunnel_info *tun_info;
2049 struct ovs_tunnel_info *ovs_tun;
2050 struct nlattr *a;
2051 int err = 0, start, opts_type;
2052
2053 ovs_match_init(&match, &key, true, NULL);
2054 opts_type = ip_tun_from_nlattr(nla_data(attr), &match, false, log);
2055 if (opts_type < 0)
2056 return opts_type;
2057
2058 if (key.tun_opts_len) {
2059 switch (opts_type) {
2060 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
2061 err = validate_geneve_opts(&key);
2062 if (err < 0)
2063 return err;
2064 break;
2065 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
2066 break;
2067 }
2068 };
2069
2070 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET, log);
2071 if (start < 0)
2072 return start;
2073
2074 tun_dst = metadata_dst_alloc(key.tun_opts_len, GFP_KERNEL);
2075 if (!tun_dst)
2076 return -ENOMEM;
2077
2078 err = dst_cache_init(&tun_dst->u.tun_info.dst_cache, GFP_KERNEL);
2079 if (err) {
2080 dst_release((struct dst_entry *)tun_dst);
2081 return err;
2082 }
2083
2084 a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL,
2085 sizeof(*ovs_tun), log);
2086 if (IS_ERR(a)) {
2087 dst_release((struct dst_entry *)tun_dst);
2088 return PTR_ERR(a);
2089 }
2090
2091 ovs_tun = nla_data(a);
2092 ovs_tun->tun_dst = tun_dst;
2093
2094 tun_info = &tun_dst->u.tun_info;
2095 tun_info->mode = IP_TUNNEL_INFO_TX;
2096 if (key.tun_proto == AF_INET6)
2097 tun_info->mode |= IP_TUNNEL_INFO_IPV6;
2098 tun_info->key = key.tun_key;
2099
2100 /* We need to store the options in the action itself since
2101 * everything else will go away after flow setup. We can append
2102 * it to tun_info and then point there.
2103 */
2104 ip_tunnel_info_opts_set(tun_info,
2105 TUN_METADATA_OPTS(&key, key.tun_opts_len),
2106 key.tun_opts_len);
2107 add_nested_action_end(*sfa, start);
2108
2109 return err;
2110 }
2111
2112 /* Return false if there are any non-masked bits set.
2113 * Mask follows data immediately, before any netlink padding.
2114 */
2115 static bool validate_masked(u8 *data, int len)
2116 {
2117 u8 *mask = data + len;
2118
2119 while (len--)
2120 if (*data++ & ~*mask++)
2121 return false;
2122
2123 return true;
2124 }
2125
2126 static int validate_set(const struct nlattr *a,
2127 const struct sw_flow_key *flow_key,
2128 struct sw_flow_actions **sfa,
2129 bool *skip_copy, __be16 eth_type, bool masked, bool log)
2130 {
2131 const struct nlattr *ovs_key = nla_data(a);
2132 int key_type = nla_type(ovs_key);
2133 size_t key_len;
2134
2135 /* There can be only one key in a action */
2136 if (nla_total_size(nla_len(ovs_key)) != nla_len(a))
2137 return -EINVAL;
2138
2139 key_len = nla_len(ovs_key);
2140 if (masked)
2141 key_len /= 2;
2142
2143 if (key_type > OVS_KEY_ATTR_MAX ||
2144 !check_attr_len(key_len, ovs_key_lens[key_type].len))
2145 return -EINVAL;
2146
2147 if (masked && !validate_masked(nla_data(ovs_key), key_len))
2148 return -EINVAL;
2149
2150 switch (key_type) {
2151 const struct ovs_key_ipv4 *ipv4_key;
2152 const struct ovs_key_ipv6 *ipv6_key;
2153 int err;
2154
2155 case OVS_KEY_ATTR_PRIORITY:
2156 case OVS_KEY_ATTR_SKB_MARK:
2157 case OVS_KEY_ATTR_CT_MARK:
2158 case OVS_KEY_ATTR_CT_LABELS:
2159 case OVS_KEY_ATTR_ETHERNET:
2160 break;
2161
2162 case OVS_KEY_ATTR_TUNNEL:
2163 if (masked)
2164 return -EINVAL; /* Masked tunnel set not supported. */
2165
2166 *skip_copy = true;
2167 err = validate_and_copy_set_tun(a, sfa, log);
2168 if (err)
2169 return err;
2170 break;
2171
2172 case OVS_KEY_ATTR_IPV4:
2173 if (eth_type != htons(ETH_P_IP))
2174 return -EINVAL;
2175
2176 ipv4_key = nla_data(ovs_key);
2177
2178 if (masked) {
2179 const struct ovs_key_ipv4 *mask = ipv4_key + 1;
2180
2181 /* Non-writeable fields. */
2182 if (mask->ipv4_proto || mask->ipv4_frag)
2183 return -EINVAL;
2184 } else {
2185 if (ipv4_key->ipv4_proto != flow_key->ip.proto)
2186 return -EINVAL;
2187
2188 if (ipv4_key->ipv4_frag != flow_key->ip.frag)
2189 return -EINVAL;
2190 }
2191 break;
2192
2193 case OVS_KEY_ATTR_IPV6:
2194 if (eth_type != htons(ETH_P_IPV6))
2195 return -EINVAL;
2196
2197 ipv6_key = nla_data(ovs_key);
2198
2199 if (masked) {
2200 const struct ovs_key_ipv6 *mask = ipv6_key + 1;
2201
2202 /* Non-writeable fields. */
2203 if (mask->ipv6_proto || mask->ipv6_frag)
2204 return -EINVAL;
2205
2206 /* Invalid bits in the flow label mask? */
2207 if (ntohl(mask->ipv6_label) & 0xFFF00000)
2208 return -EINVAL;
2209 } else {
2210 if (ipv6_key->ipv6_proto != flow_key->ip.proto)
2211 return -EINVAL;
2212
2213 if (ipv6_key->ipv6_frag != flow_key->ip.frag)
2214 return -EINVAL;
2215 }
2216 if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000)
2217 return -EINVAL;
2218
2219 break;
2220
2221 case OVS_KEY_ATTR_TCP:
2222 if ((eth_type != htons(ETH_P_IP) &&
2223 eth_type != htons(ETH_P_IPV6)) ||
2224 flow_key->ip.proto != IPPROTO_TCP)
2225 return -EINVAL;
2226
2227 break;
2228
2229 case OVS_KEY_ATTR_UDP:
2230 if ((eth_type != htons(ETH_P_IP) &&
2231 eth_type != htons(ETH_P_IPV6)) ||
2232 flow_key->ip.proto != IPPROTO_UDP)
2233 return -EINVAL;
2234
2235 break;
2236
2237 case OVS_KEY_ATTR_MPLS:
2238 if (!eth_p_mpls(eth_type))
2239 return -EINVAL;
2240 break;
2241
2242 case OVS_KEY_ATTR_SCTP:
2243 if ((eth_type != htons(ETH_P_IP) &&
2244 eth_type != htons(ETH_P_IPV6)) ||
2245 flow_key->ip.proto != IPPROTO_SCTP)
2246 return -EINVAL;
2247
2248 break;
2249
2250 default:
2251 return -EINVAL;
2252 }
2253
2254 /* Convert non-masked non-tunnel set actions to masked set actions. */
2255 if (!masked && key_type != OVS_KEY_ATTR_TUNNEL) {
2256 int start, len = key_len * 2;
2257 struct nlattr *at;
2258
2259 *skip_copy = true;
2260
2261 start = add_nested_action_start(sfa,
2262 OVS_ACTION_ATTR_SET_TO_MASKED,
2263 log);
2264 if (start < 0)
2265 return start;
2266
2267 at = __add_action(sfa, key_type, NULL, len, log);
2268 if (IS_ERR(at))
2269 return PTR_ERR(at);
2270
2271 memcpy(nla_data(at), nla_data(ovs_key), key_len); /* Key. */
2272 memset(nla_data(at) + key_len, 0xff, key_len); /* Mask. */
2273 /* Clear non-writeable bits from otherwise writeable fields. */
2274 if (key_type == OVS_KEY_ATTR_IPV6) {
2275 struct ovs_key_ipv6 *mask = nla_data(at) + key_len;
2276
2277 mask->ipv6_label &= htonl(0x000FFFFF);
2278 }
2279 add_nested_action_end(*sfa, start);
2280 }
2281
2282 return 0;
2283 }
2284
2285 static int validate_userspace(const struct nlattr *attr)
2286 {
2287 static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = {
2288 [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 },
2289 [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC },
2290 [OVS_USERSPACE_ATTR_EGRESS_TUN_PORT] = {.type = NLA_U32 },
2291 };
2292 struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];
2293 int error;
2294
2295 error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX,
2296 attr, userspace_policy);
2297 if (error)
2298 return error;
2299
2300 if (!a[OVS_USERSPACE_ATTR_PID] ||
2301 !nla_get_u32(a[OVS_USERSPACE_ATTR_PID]))
2302 return -EINVAL;
2303
2304 return 0;
2305 }
2306
2307 static int copy_action(const struct nlattr *from,
2308 struct sw_flow_actions **sfa, bool log)
2309 {
2310 int totlen = NLA_ALIGN(from->nla_len);
2311 struct nlattr *to;
2312
2313 to = reserve_sfa_size(sfa, from->nla_len, log);
2314 if (IS_ERR(to))
2315 return PTR_ERR(to);
2316
2317 memcpy(to, from, totlen);
2318 return 0;
2319 }
2320
2321 static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
2322 const struct sw_flow_key *key,
2323 int depth, struct sw_flow_actions **sfa,
2324 __be16 eth_type, __be16 vlan_tci, bool log)
2325 {
2326 const struct nlattr *a;
2327 int rem, err;
2328
2329 if (depth >= SAMPLE_ACTION_DEPTH)
2330 return -EOVERFLOW;
2331
2332 nla_for_each_nested(a, attr, rem) {
2333 /* Expected argument lengths, (u32)-1 for variable length. */
2334 static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {
2335 [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32),
2336 [OVS_ACTION_ATTR_RECIRC] = sizeof(u32),
2337 [OVS_ACTION_ATTR_USERSPACE] = (u32)-1,
2338 [OVS_ACTION_ATTR_PUSH_MPLS] = sizeof(struct ovs_action_push_mpls),
2339 [OVS_ACTION_ATTR_POP_MPLS] = sizeof(__be16),
2340 [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan),
2341 [OVS_ACTION_ATTR_POP_VLAN] = 0,
2342 [OVS_ACTION_ATTR_SET] = (u32)-1,
2343 [OVS_ACTION_ATTR_SET_MASKED] = (u32)-1,
2344 [OVS_ACTION_ATTR_SAMPLE] = (u32)-1,
2345 [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash),
2346 [OVS_ACTION_ATTR_CT] = (u32)-1,
2347 [OVS_ACTION_ATTR_TRUNC] = sizeof(struct ovs_action_trunc),
2348 };
2349 const struct ovs_action_push_vlan *vlan;
2350 int type = nla_type(a);
2351 bool skip_copy;
2352
2353 if (type > OVS_ACTION_ATTR_MAX ||
2354 (action_lens[type] != nla_len(a) &&
2355 action_lens[type] != (u32)-1))
2356 return -EINVAL;
2357
2358 skip_copy = false;
2359 switch (type) {
2360 case OVS_ACTION_ATTR_UNSPEC:
2361 return -EINVAL;
2362
2363 case OVS_ACTION_ATTR_USERSPACE:
2364 err = validate_userspace(a);
2365 if (err)
2366 return err;
2367 break;
2368
2369 case OVS_ACTION_ATTR_OUTPUT:
2370 if (nla_get_u32(a) >= DP_MAX_PORTS)
2371 return -EINVAL;
2372 break;
2373
2374 case OVS_ACTION_ATTR_TRUNC: {
2375 const struct ovs_action_trunc *trunc = nla_data(a);
2376
2377 if (trunc->max_len < ETH_HLEN)
2378 return -EINVAL;
2379 break;
2380 }
2381
2382 case OVS_ACTION_ATTR_HASH: {
2383 const struct ovs_action_hash *act_hash = nla_data(a);
2384
2385 switch (act_hash->hash_alg) {
2386 case OVS_HASH_ALG_L4:
2387 break;
2388 default:
2389 return -EINVAL;
2390 }
2391
2392 break;
2393 }
2394
2395 case OVS_ACTION_ATTR_POP_VLAN:
2396 vlan_tci = htons(0);
2397 break;
2398
2399 case OVS_ACTION_ATTR_PUSH_VLAN:
2400 vlan = nla_data(a);
2401 if (!eth_type_vlan(vlan->vlan_tpid))
2402 return -EINVAL;
2403 if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT)))
2404 return -EINVAL;
2405 vlan_tci = vlan->vlan_tci;
2406 break;
2407
2408 case OVS_ACTION_ATTR_RECIRC:
2409 break;
2410
2411 case OVS_ACTION_ATTR_PUSH_MPLS: {
2412 const struct ovs_action_push_mpls *mpls = nla_data(a);
2413
2414 if (!eth_p_mpls(mpls->mpls_ethertype))
2415 return -EINVAL;
2416 /* Prohibit push MPLS other than to a white list
2417 * for packets that have a known tag order.
2418 */
2419 if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
2420 (eth_type != htons(ETH_P_IP) &&
2421 eth_type != htons(ETH_P_IPV6) &&
2422 eth_type != htons(ETH_P_ARP) &&
2423 eth_type != htons(ETH_P_RARP) &&
2424 !eth_p_mpls(eth_type)))
2425 return -EINVAL;
2426 eth_type = mpls->mpls_ethertype;
2427 break;
2428 }
2429
2430 case OVS_ACTION_ATTR_POP_MPLS:
2431 if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
2432 !eth_p_mpls(eth_type))
2433 return -EINVAL;
2434
2435 /* Disallow subsequent L2.5+ set and mpls_pop actions
2436 * as there is no check here to ensure that the new
2437 * eth_type is valid and thus set actions could
2438 * write off the end of the packet or otherwise
2439 * corrupt it.
2440 *
2441 * Support for these actions is planned using packet
2442 * recirculation.
2443 */
2444 eth_type = htons(0);
2445 break;
2446
2447 case OVS_ACTION_ATTR_SET:
2448 err = validate_set(a, key, sfa,
2449 &skip_copy, eth_type, false, log);
2450 if (err)
2451 return err;
2452 break;
2453
2454 case OVS_ACTION_ATTR_SET_MASKED:
2455 err = validate_set(a, key, sfa,
2456 &skip_copy, eth_type, true, log);
2457 if (err)
2458 return err;
2459 break;
2460
2461 case OVS_ACTION_ATTR_SAMPLE:
2462 err = validate_and_copy_sample(net, a, key, depth, sfa,
2463 eth_type, vlan_tci, log);
2464 if (err)
2465 return err;
2466 skip_copy = true;
2467 break;
2468
2469 case OVS_ACTION_ATTR_CT:
2470 err = ovs_ct_copy_action(net, a, key, sfa, log);
2471 if (err)
2472 return err;
2473 skip_copy = true;
2474 break;
2475
2476 default:
2477 OVS_NLERR(log, "Unknown Action type %d", type);
2478 return -EINVAL;
2479 }
2480 if (!skip_copy) {
2481 err = copy_action(a, sfa, log);
2482 if (err)
2483 return err;
2484 }
2485 }
2486
2487 if (rem > 0)
2488 return -EINVAL;
2489
2490 return 0;
2491 }
2492
2493 /* 'key' must be the masked key. */
2494 int ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
2495 const struct sw_flow_key *key,
2496 struct sw_flow_actions **sfa, bool log)
2497 {
2498 int err;
2499
2500 *sfa = nla_alloc_flow_actions(min(nla_len(attr), MAX_ACTIONS_BUFSIZE));
2501 if (IS_ERR(*sfa))
2502 return PTR_ERR(*sfa);
2503
2504 (*sfa)->orig_len = nla_len(attr);
2505 err = __ovs_nla_copy_actions(net, attr, key, 0, sfa, key->eth.type,
2506 key->eth.vlan.tci, log);
2507 if (err)
2508 ovs_nla_free_flow_actions(*sfa);
2509
2510 return err;
2511 }
2512
2513 static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb)
2514 {
2515 const struct nlattr *a;
2516 struct nlattr *start;
2517 int err = 0, rem;
2518
2519 start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE);
2520 if (!start)
2521 return -EMSGSIZE;
2522
2523 nla_for_each_nested(a, attr, rem) {
2524 int type = nla_type(a);
2525 struct nlattr *st_sample;
2526
2527 switch (type) {
2528 case OVS_SAMPLE_ATTR_PROBABILITY:
2529 if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY,
2530 sizeof(u32), nla_data(a)))
2531 return -EMSGSIZE;
2532 break;
2533 case OVS_SAMPLE_ATTR_ACTIONS:
2534 st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS);
2535 if (!st_sample)
2536 return -EMSGSIZE;
2537 err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb);
2538 if (err)
2539 return err;
2540 nla_nest_end(skb, st_sample);
2541 break;
2542 }
2543 }
2544
2545 nla_nest_end(skb, start);
2546 return err;
2547 }
2548
2549 static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb)
2550 {
2551 const struct nlattr *ovs_key = nla_data(a);
2552 int key_type = nla_type(ovs_key);
2553 struct nlattr *start;
2554 int err;
2555
2556 switch (key_type) {
2557 case OVS_KEY_ATTR_TUNNEL_INFO: {
2558 struct ovs_tunnel_info *ovs_tun = nla_data(ovs_key);
2559 struct ip_tunnel_info *tun_info = &ovs_tun->tun_dst->u.tun_info;
2560
2561 start = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
2562 if (!start)
2563 return -EMSGSIZE;
2564
2565 err = ip_tun_to_nlattr(skb, &tun_info->key,
2566 ip_tunnel_info_opts(tun_info),
2567 tun_info->options_len,
2568 ip_tunnel_info_af(tun_info));
2569 if (err)
2570 return err;
2571 nla_nest_end(skb, start);
2572 break;
2573 }
2574 default:
2575 if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key))
2576 return -EMSGSIZE;
2577 break;
2578 }
2579
2580 return 0;
2581 }
2582
2583 static int masked_set_action_to_set_action_attr(const struct nlattr *a,
2584 struct sk_buff *skb)
2585 {
2586 const struct nlattr *ovs_key = nla_data(a);
2587 struct nlattr *nla;
2588 size_t key_len = nla_len(ovs_key) / 2;
2589
2590 /* Revert the conversion we did from a non-masked set action to
2591 * masked set action.
2592 */
2593 nla = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
2594 if (!nla)
2595 return -EMSGSIZE;
2596
2597 if (nla_put(skb, nla_type(ovs_key), key_len, nla_data(ovs_key)))
2598 return -EMSGSIZE;
2599
2600 nla_nest_end(skb, nla);
2601 return 0;
2602 }
2603
2604 int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb)
2605 {
2606 const struct nlattr *a;
2607 int rem, err;
2608
2609 nla_for_each_attr(a, attr, len, rem) {
2610 int type = nla_type(a);
2611
2612 switch (type) {
2613 case OVS_ACTION_ATTR_SET:
2614 err = set_action_to_attr(a, skb);
2615 if (err)
2616 return err;
2617 break;
2618
2619 case OVS_ACTION_ATTR_SET_TO_MASKED:
2620 err = masked_set_action_to_set_action_attr(a, skb);
2621 if (err)
2622 return err;
2623 break;
2624
2625 case OVS_ACTION_ATTR_SAMPLE:
2626 err = sample_action_to_attr(a, skb);
2627 if (err)
2628 return err;
2629 break;
2630
2631 case OVS_ACTION_ATTR_CT:
2632 err = ovs_ct_action_to_attr(nla_data(a), skb);
2633 if (err)
2634 return err;
2635 break;
2636
2637 default:
2638 if (nla_put(skb, type, nla_len(a), nla_data(a)))
2639 return -EMSGSIZE;
2640 break;
2641 }
2642 }
2643
2644 return 0;
2645 }
Linux with added FPC-III support