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fs/sysv/inode.c: use ktime_get_real_seconds() for superblock stamp
[linux/fpc-iii.git] / net / openvswitch / flow_netlink.c
bloba70097ecf33c2bf9e9df7b92c2359ab679ae6d7e
1 /*
2 * Copyright (c) 2007-2017 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 #include <net/tun_proto.h>
52 #include <net/erspan.h>
53
54 #include "flow_netlink.h"
55
56 struct ovs_len_tbl {
57 int len;
58 const struct ovs_len_tbl *next;
59 };
60
61 #define OVS_ATTR_NESTED -1
62 #define OVS_ATTR_VARIABLE -2
63
64 static bool actions_may_change_flow(const struct nlattr *actions)
65 {
66 struct nlattr *nla;
67 int rem;
68
69 nla_for_each_nested(nla, actions, rem) {
70 u16 action = nla_type(nla);
71
72 switch (action) {
73 case OVS_ACTION_ATTR_OUTPUT:
74 case OVS_ACTION_ATTR_RECIRC:
75 case OVS_ACTION_ATTR_TRUNC:
76 case OVS_ACTION_ATTR_USERSPACE:
77 break;
78
79 case OVS_ACTION_ATTR_CT:
80 case OVS_ACTION_ATTR_CT_CLEAR:
81 case OVS_ACTION_ATTR_HASH:
82 case OVS_ACTION_ATTR_POP_ETH:
83 case OVS_ACTION_ATTR_POP_MPLS:
84 case OVS_ACTION_ATTR_POP_NSH:
85 case OVS_ACTION_ATTR_POP_VLAN:
86 case OVS_ACTION_ATTR_PUSH_ETH:
87 case OVS_ACTION_ATTR_PUSH_MPLS:
88 case OVS_ACTION_ATTR_PUSH_NSH:
89 case OVS_ACTION_ATTR_PUSH_VLAN:
90 case OVS_ACTION_ATTR_SAMPLE:
91 case OVS_ACTION_ATTR_SET:
92 case OVS_ACTION_ATTR_SET_MASKED:
93 case OVS_ACTION_ATTR_METER:
94 default:
95 return true;
96 }
97 }
98 return false;
99 }
100
101 static void update_range(struct sw_flow_match *match,
102 size_t offset, size_t size, bool is_mask)
103 {
104 struct sw_flow_key_range *range;
105 size_t start = rounddown(offset, sizeof(long));
106 size_t end = roundup(offset + size, sizeof(long));
107
108 if (!is_mask)
109 range = &match->range;
110 else
111 range = &match->mask->range;
112
113 if (range->start == range->end) {
114 range->start = start;
115 range->end = end;
116 return;
117 }
118
119 if (range->start > start)
120 range->start = start;
121
122 if (range->end < end)
123 range->end = end;
124 }
125
126 #define SW_FLOW_KEY_PUT(match, field, value, is_mask) \
127 do { \
128 update_range(match, offsetof(struct sw_flow_key, field), \
129 sizeof((match)->key->field), is_mask); \
130 if (is_mask) \
131 (match)->mask->key.field = value; \
132 else \
133 (match)->key->field = value; \
134 } while (0)
135
136 #define SW_FLOW_KEY_MEMCPY_OFFSET(match, offset, value_p, len, is_mask) \
137 do { \
138 update_range(match, offset, len, is_mask); \
139 if (is_mask) \
140 memcpy((u8 *)&(match)->mask->key + offset, value_p, \
141 len); \
142 else \
143 memcpy((u8 *)(match)->key + offset, value_p, len); \
144 } while (0)
145
146 #define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \
147 SW_FLOW_KEY_MEMCPY_OFFSET(match, offsetof(struct sw_flow_key, field), \
148 value_p, len, is_mask)
149
150 #define SW_FLOW_KEY_MEMSET_FIELD(match, field, value, is_mask) \
151 do { \
152 update_range(match, offsetof(struct sw_flow_key, field), \
153 sizeof((match)->key->field), is_mask); \
154 if (is_mask) \
155 memset((u8 *)&(match)->mask->key.field, value, \
156 sizeof((match)->mask->key.field)); \
157 else \
158 memset((u8 *)&(match)->key->field, value, \
159 sizeof((match)->key->field)); \
160 } while (0)
161
162 static bool match_validate(const struct sw_flow_match *match,
163 u64 key_attrs, u64 mask_attrs, bool log)
164 {
165 u64 key_expected = 0;
166 u64 mask_allowed = key_attrs; /* At most allow all key attributes */
167
168 /* The following mask attributes allowed only if they
169 * pass the validation tests. */
170 mask_allowed &= ~((1 << OVS_KEY_ATTR_IPV4)
171 | (1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4)
172 | (1 << OVS_KEY_ATTR_IPV6)
173 | (1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6)
174 | (1 << OVS_KEY_ATTR_TCP)
175 | (1 << OVS_KEY_ATTR_TCP_FLAGS)
176 | (1 << OVS_KEY_ATTR_UDP)
177 | (1 << OVS_KEY_ATTR_SCTP)
178 | (1 << OVS_KEY_ATTR_ICMP)
179 | (1 << OVS_KEY_ATTR_ICMPV6)
180 | (1 << OVS_KEY_ATTR_ARP)
181 | (1 << OVS_KEY_ATTR_ND)
182 | (1 << OVS_KEY_ATTR_MPLS)
183 | (1 << OVS_KEY_ATTR_NSH));
184
185 /* Always allowed mask fields. */
186 mask_allowed |= ((1 << OVS_KEY_ATTR_TUNNEL)
187 | (1 << OVS_KEY_ATTR_IN_PORT)
188 | (1 << OVS_KEY_ATTR_ETHERTYPE));
189
190 /* Check key attributes. */
191 if (match->key->eth.type == htons(ETH_P_ARP)
192 || match->key->eth.type == htons(ETH_P_RARP)) {
193 key_expected |= 1 << OVS_KEY_ATTR_ARP;
194 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
195 mask_allowed |= 1 << OVS_KEY_ATTR_ARP;
196 }
197
198 if (eth_p_mpls(match->key->eth.type)) {
199 key_expected |= 1 << OVS_KEY_ATTR_MPLS;
200 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
201 mask_allowed |= 1 << OVS_KEY_ATTR_MPLS;
202 }
203
204 if (match->key->eth.type == htons(ETH_P_IP)) {
205 key_expected |= 1 << OVS_KEY_ATTR_IPV4;
206 if (match->mask && match->mask->key.eth.type == htons(0xffff)) {
207 mask_allowed |= 1 << OVS_KEY_ATTR_IPV4;
208 mask_allowed |= 1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4;
209 }
210
211 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
212 if (match->key->ip.proto == IPPROTO_UDP) {
213 key_expected |= 1 << OVS_KEY_ATTR_UDP;
214 if (match->mask && (match->mask->key.ip.proto == 0xff))
215 mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
216 }
217
218 if (match->key->ip.proto == IPPROTO_SCTP) {
219 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
220 if (match->mask && (match->mask->key.ip.proto == 0xff))
221 mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
222 }
223
224 if (match->key->ip.proto == IPPROTO_TCP) {
225 key_expected |= 1 << OVS_KEY_ATTR_TCP;
226 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
227 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
228 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
229 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
230 }
231 }
232
233 if (match->key->ip.proto == IPPROTO_ICMP) {
234 key_expected |= 1 << OVS_KEY_ATTR_ICMP;
235 if (match->mask && (match->mask->key.ip.proto == 0xff))
236 mask_allowed |= 1 << OVS_KEY_ATTR_ICMP;
237 }
238 }
239 }
240
241 if (match->key->eth.type == htons(ETH_P_IPV6)) {
242 key_expected |= 1 << OVS_KEY_ATTR_IPV6;
243 if (match->mask && match->mask->key.eth.type == htons(0xffff)) {
244 mask_allowed |= 1 << OVS_KEY_ATTR_IPV6;
245 mask_allowed |= 1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6;
246 }
247
248 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
249 if (match->key->ip.proto == IPPROTO_UDP) {
250 key_expected |= 1 << OVS_KEY_ATTR_UDP;
251 if (match->mask && (match->mask->key.ip.proto == 0xff))
252 mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
253 }
254
255 if (match->key->ip.proto == IPPROTO_SCTP) {
256 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
257 if (match->mask && (match->mask->key.ip.proto == 0xff))
258 mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
259 }
260
261 if (match->key->ip.proto == IPPROTO_TCP) {
262 key_expected |= 1 << OVS_KEY_ATTR_TCP;
263 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
264 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
265 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
266 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
267 }
268 }
269
270 if (match->key->ip.proto == IPPROTO_ICMPV6) {
271 key_expected |= 1 << OVS_KEY_ATTR_ICMPV6;
272 if (match->mask && (match->mask->key.ip.proto == 0xff))
273 mask_allowed |= 1 << OVS_KEY_ATTR_ICMPV6;
274
275 if (match->key->tp.src ==
276 htons(NDISC_NEIGHBOUR_SOLICITATION) ||
277 match->key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) {
278 key_expected |= 1 << OVS_KEY_ATTR_ND;
279 /* Original direction conntrack tuple
280 * uses the same space as the ND fields
281 * in the key, so both are not allowed
282 * at the same time.
283 */
284 mask_allowed &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6);
285 if (match->mask && (match->mask->key.tp.src == htons(0xff)))
286 mask_allowed |= 1 << OVS_KEY_ATTR_ND;
287 }
288 }
289 }
290 }
291
292 if (match->key->eth.type == htons(ETH_P_NSH)) {
293 key_expected |= 1 << OVS_KEY_ATTR_NSH;
294 if (match->mask &&
295 match->mask->key.eth.type == htons(0xffff)) {
296 mask_allowed |= 1 << OVS_KEY_ATTR_NSH;
297 }
298 }
299
300 if ((key_attrs & key_expected) != key_expected) {
301 /* Key attributes check failed. */
302 OVS_NLERR(log, "Missing key (keys=%llx, expected=%llx)",
303 (unsigned long long)key_attrs,
304 (unsigned long long)key_expected);
305 return false;
306 }
307
308 if ((mask_attrs & mask_allowed) != mask_attrs) {
309 /* Mask attributes check failed. */
310 OVS_NLERR(log, "Unexpected mask (mask=%llx, allowed=%llx)",
311 (unsigned long long)mask_attrs,
312 (unsigned long long)mask_allowed);
313 return false;
314 }
315
316 return true;
317 }
318
319 size_t ovs_tun_key_attr_size(void)
320 {
321 /* Whenever adding new OVS_TUNNEL_KEY_ FIELDS, we should consider
322 * updating this function.
323 */
324 return nla_total_size_64bit(8) /* OVS_TUNNEL_KEY_ATTR_ID */
325 + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_SRC */
326 + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_DST */
327 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */
328 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */
329 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */
330 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */
331 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_OAM */
332 + nla_total_size(256) /* OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS */
333 /* OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS and
334 * OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS is mutually exclusive with
335 * OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS and covered by it.
336 */
337 + nla_total_size(2) /* OVS_TUNNEL_KEY_ATTR_TP_SRC */
338 + nla_total_size(2); /* OVS_TUNNEL_KEY_ATTR_TP_DST */
339 }
340
341 static size_t ovs_nsh_key_attr_size(void)
342 {
343 /* Whenever adding new OVS_NSH_KEY_ FIELDS, we should consider
344 * updating this function.
345 */
346 return nla_total_size(NSH_BASE_HDR_LEN) /* OVS_NSH_KEY_ATTR_BASE */
347 /* OVS_NSH_KEY_ATTR_MD1 and OVS_NSH_KEY_ATTR_MD2 are
348 * mutually exclusive, so the bigger one can cover
349 * the small one.
350 */
351 + nla_total_size(NSH_CTX_HDRS_MAX_LEN);
352 }
353
354 size_t ovs_key_attr_size(void)
355 {
356 /* Whenever adding new OVS_KEY_ FIELDS, we should consider
357 * updating this function.
358 */
359 BUILD_BUG_ON(OVS_KEY_ATTR_TUNNEL_INFO != 29);
360
361 return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */
362 + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */
363 + ovs_tun_key_attr_size()
364 + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */
365 + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */
366 + nla_total_size(4) /* OVS_KEY_ATTR_DP_HASH */
367 + nla_total_size(4) /* OVS_KEY_ATTR_RECIRC_ID */
368 + nla_total_size(4) /* OVS_KEY_ATTR_CT_STATE */
369 + nla_total_size(2) /* OVS_KEY_ATTR_CT_ZONE */
370 + nla_total_size(4) /* OVS_KEY_ATTR_CT_MARK */
371 + nla_total_size(16) /* OVS_KEY_ATTR_CT_LABELS */
372 + nla_total_size(40) /* OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6 */
373 + nla_total_size(0) /* OVS_KEY_ATTR_NSH */
374 + ovs_nsh_key_attr_size()
375 + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */
376 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
377 + nla_total_size(4) /* OVS_KEY_ATTR_VLAN */
378 + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */
379 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
380 + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */
381 + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */
382 + nla_total_size(28); /* OVS_KEY_ATTR_ND */
383 }
384
385 static const struct ovs_len_tbl ovs_vxlan_ext_key_lens[OVS_VXLAN_EXT_MAX + 1] = {
386 [OVS_VXLAN_EXT_GBP] = { .len = sizeof(u32) },
387 };
388
389 static const struct ovs_len_tbl ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = {
390 [OVS_TUNNEL_KEY_ATTR_ID] = { .len = sizeof(u64) },
391 [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = { .len = sizeof(u32) },
392 [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = { .len = sizeof(u32) },
393 [OVS_TUNNEL_KEY_ATTR_TOS] = { .len = 1 },
394 [OVS_TUNNEL_KEY_ATTR_TTL] = { .len = 1 },
395 [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = { .len = 0 },
396 [OVS_TUNNEL_KEY_ATTR_CSUM] = { .len = 0 },
397 [OVS_TUNNEL_KEY_ATTR_TP_SRC] = { .len = sizeof(u16) },
398 [OVS_TUNNEL_KEY_ATTR_TP_DST] = { .len = sizeof(u16) },
399 [OVS_TUNNEL_KEY_ATTR_OAM] = { .len = 0 },
400 [OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS] = { .len = OVS_ATTR_VARIABLE },
401 [OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS] = { .len = OVS_ATTR_NESTED,
402 .next = ovs_vxlan_ext_key_lens },
403 [OVS_TUNNEL_KEY_ATTR_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
404 [OVS_TUNNEL_KEY_ATTR_IPV6_DST] = { .len = sizeof(struct in6_addr) },
405 [OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS] = { .len = OVS_ATTR_VARIABLE },
406 };
407
408 static const struct ovs_len_tbl
409 ovs_nsh_key_attr_lens[OVS_NSH_KEY_ATTR_MAX + 1] = {
410 [OVS_NSH_KEY_ATTR_BASE] = { .len = sizeof(struct ovs_nsh_key_base) },
411 [OVS_NSH_KEY_ATTR_MD1] = { .len = sizeof(struct ovs_nsh_key_md1) },
412 [OVS_NSH_KEY_ATTR_MD2] = { .len = OVS_ATTR_VARIABLE },
413 };
414
415 /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */
416 static const struct ovs_len_tbl ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = {
417 [OVS_KEY_ATTR_ENCAP] = { .len = OVS_ATTR_NESTED },
418 [OVS_KEY_ATTR_PRIORITY] = { .len = sizeof(u32) },
419 [OVS_KEY_ATTR_IN_PORT] = { .len = sizeof(u32) },
420 [OVS_KEY_ATTR_SKB_MARK] = { .len = sizeof(u32) },
421 [OVS_KEY_ATTR_ETHERNET] = { .len = sizeof(struct ovs_key_ethernet) },
422 [OVS_KEY_ATTR_VLAN] = { .len = sizeof(__be16) },
423 [OVS_KEY_ATTR_ETHERTYPE] = { .len = sizeof(__be16) },
424 [OVS_KEY_ATTR_IPV4] = { .len = sizeof(struct ovs_key_ipv4) },
425 [OVS_KEY_ATTR_IPV6] = { .len = sizeof(struct ovs_key_ipv6) },
426 [OVS_KEY_ATTR_TCP] = { .len = sizeof(struct ovs_key_tcp) },
427 [OVS_KEY_ATTR_TCP_FLAGS] = { .len = sizeof(__be16) },
428 [OVS_KEY_ATTR_UDP] = { .len = sizeof(struct ovs_key_udp) },
429 [OVS_KEY_ATTR_SCTP] = { .len = sizeof(struct ovs_key_sctp) },
430 [OVS_KEY_ATTR_ICMP] = { .len = sizeof(struct ovs_key_icmp) },
431 [OVS_KEY_ATTR_ICMPV6] = { .len = sizeof(struct ovs_key_icmpv6) },
432 [OVS_KEY_ATTR_ARP] = { .len = sizeof(struct ovs_key_arp) },
433 [OVS_KEY_ATTR_ND] = { .len = sizeof(struct ovs_key_nd) },
434 [OVS_KEY_ATTR_RECIRC_ID] = { .len = sizeof(u32) },
435 [OVS_KEY_ATTR_DP_HASH] = { .len = sizeof(u32) },
436 [OVS_KEY_ATTR_TUNNEL] = { .len = OVS_ATTR_NESTED,
437 .next = ovs_tunnel_key_lens, },
438 [OVS_KEY_ATTR_MPLS] = { .len = sizeof(struct ovs_key_mpls) },
439 [OVS_KEY_ATTR_CT_STATE] = { .len = sizeof(u32) },
440 [OVS_KEY_ATTR_CT_ZONE] = { .len = sizeof(u16) },
441 [OVS_KEY_ATTR_CT_MARK] = { .len = sizeof(u32) },
442 [OVS_KEY_ATTR_CT_LABELS] = { .len = sizeof(struct ovs_key_ct_labels) },
443 [OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4] = {
444 .len = sizeof(struct ovs_key_ct_tuple_ipv4) },
445 [OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6] = {
446 .len = sizeof(struct ovs_key_ct_tuple_ipv6) },
447 [OVS_KEY_ATTR_NSH] = { .len = OVS_ATTR_NESTED,
448 .next = ovs_nsh_key_attr_lens, },
449 };
450
451 static bool check_attr_len(unsigned int attr_len, unsigned int expected_len)
452 {
453 return expected_len == attr_len ||
454 expected_len == OVS_ATTR_NESTED ||
455 expected_len == OVS_ATTR_VARIABLE;
456 }
457
458 static bool is_all_zero(const u8 *fp, size_t size)
459 {
460 int i;
461
462 if (!fp)
463 return false;
464
465 for (i = 0; i < size; i++)
466 if (fp[i])
467 return false;
468
469 return true;
470 }
471
472 static int __parse_flow_nlattrs(const struct nlattr *attr,
473 const struct nlattr *a[],
474 u64 *attrsp, bool log, bool nz)
475 {
476 const struct nlattr *nla;
477 u64 attrs;
478 int rem;
479
480 attrs = *attrsp;
481 nla_for_each_nested(nla, attr, rem) {
482 u16 type = nla_type(nla);
483 int expected_len;
484
485 if (type > OVS_KEY_ATTR_MAX) {
486 OVS_NLERR(log, "Key type %d is out of range max %d",
487 type, OVS_KEY_ATTR_MAX);
488 return -EINVAL;
489 }
490
491 if (attrs & (1 << type)) {
492 OVS_NLERR(log, "Duplicate key (type %d).", type);
493 return -EINVAL;
494 }
495
496 expected_len = ovs_key_lens[type].len;
497 if (!check_attr_len(nla_len(nla), expected_len)) {
498 OVS_NLERR(log, "Key %d has unexpected len %d expected %d",
499 type, nla_len(nla), expected_len);
500 return -EINVAL;
501 }
502
503 if (!nz || !is_all_zero(nla_data(nla), expected_len)) {
504 attrs |= 1 << type;
505 a[type] = nla;
506 }
507 }
508 if (rem) {
509 OVS_NLERR(log, "Message has %d unknown bytes.", rem);
510 return -EINVAL;
511 }
512
513 *attrsp = attrs;
514 return 0;
515 }
516
517 static int parse_flow_mask_nlattrs(const struct nlattr *attr,
518 const struct nlattr *a[], u64 *attrsp,
519 bool log)
520 {
521 return __parse_flow_nlattrs(attr, a, attrsp, log, true);
522 }
523
524 int parse_flow_nlattrs(const struct nlattr *attr, const struct nlattr *a[],
525 u64 *attrsp, bool log)
526 {
527 return __parse_flow_nlattrs(attr, a, attrsp, log, false);
528 }
529
530 static int genev_tun_opt_from_nlattr(const struct nlattr *a,
531 struct sw_flow_match *match, bool is_mask,
532 bool log)
533 {
534 unsigned long opt_key_offset;
535
536 if (nla_len(a) > sizeof(match->key->tun_opts)) {
537 OVS_NLERR(log, "Geneve option length err (len %d, max %zu).",
538 nla_len(a), sizeof(match->key->tun_opts));
539 return -EINVAL;
540 }
541
542 if (nla_len(a) % 4 != 0) {
543 OVS_NLERR(log, "Geneve opt len %d is not a multiple of 4.",
544 nla_len(a));
545 return -EINVAL;
546 }
547
548 /* We need to record the length of the options passed
549 * down, otherwise packets with the same format but
550 * additional options will be silently matched.
551 */
552 if (!is_mask) {
553 SW_FLOW_KEY_PUT(match, tun_opts_len, nla_len(a),
554 false);
555 } else {
556 /* This is somewhat unusual because it looks at
557 * both the key and mask while parsing the
558 * attributes (and by extension assumes the key
559 * is parsed first). Normally, we would verify
560 * that each is the correct length and that the
561 * attributes line up in the validate function.
562 * However, that is difficult because this is
563 * variable length and we won't have the
564 * information later.
565 */
566 if (match->key->tun_opts_len != nla_len(a)) {
567 OVS_NLERR(log, "Geneve option len %d != mask len %d",
568 match->key->tun_opts_len, nla_len(a));
569 return -EINVAL;
570 }
571
572 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
573 }
574
575 opt_key_offset = TUN_METADATA_OFFSET(nla_len(a));
576 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, nla_data(a),
577 nla_len(a), is_mask);
578 return 0;
579 }
580
581 static int vxlan_tun_opt_from_nlattr(const struct nlattr *attr,
582 struct sw_flow_match *match, bool is_mask,
583 bool log)
584 {
585 struct nlattr *a;
586 int rem;
587 unsigned long opt_key_offset;
588 struct vxlan_metadata opts;
589
590 BUILD_BUG_ON(sizeof(opts) > sizeof(match->key->tun_opts));
591
592 memset(&opts, 0, sizeof(opts));
593 nla_for_each_nested(a, attr, rem) {
594 int type = nla_type(a);
595
596 if (type > OVS_VXLAN_EXT_MAX) {
597 OVS_NLERR(log, "VXLAN extension %d out of range max %d",
598 type, OVS_VXLAN_EXT_MAX);
599 return -EINVAL;
600 }
601
602 if (!check_attr_len(nla_len(a),
603 ovs_vxlan_ext_key_lens[type].len)) {
604 OVS_NLERR(log, "VXLAN extension %d has unexpected len %d expected %d",
605 type, nla_len(a),
606 ovs_vxlan_ext_key_lens[type].len);
607 return -EINVAL;
608 }
609
610 switch (type) {
611 case OVS_VXLAN_EXT_GBP:
612 opts.gbp = nla_get_u32(a);
613 break;
614 default:
615 OVS_NLERR(log, "Unknown VXLAN extension attribute %d",
616 type);
617 return -EINVAL;
618 }
619 }
620 if (rem) {
621 OVS_NLERR(log, "VXLAN extension message has %d unknown bytes.",
622 rem);
623 return -EINVAL;
624 }
625
626 if (!is_mask)
627 SW_FLOW_KEY_PUT(match, tun_opts_len, sizeof(opts), false);
628 else
629 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
630
631 opt_key_offset = TUN_METADATA_OFFSET(sizeof(opts));
632 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, &opts, sizeof(opts),
633 is_mask);
634 return 0;
635 }
636
637 static int erspan_tun_opt_from_nlattr(const struct nlattr *a,
638 struct sw_flow_match *match, bool is_mask,
639 bool log)
640 {
641 unsigned long opt_key_offset;
642
643 BUILD_BUG_ON(sizeof(struct erspan_metadata) >
644 sizeof(match->key->tun_opts));
645
646 if (nla_len(a) > sizeof(match->key->tun_opts)) {
647 OVS_NLERR(log, "ERSPAN option length err (len %d, max %zu).",
648 nla_len(a), sizeof(match->key->tun_opts));
649 return -EINVAL;
650 }
651
652 if (!is_mask)
653 SW_FLOW_KEY_PUT(match, tun_opts_len,
654 sizeof(struct erspan_metadata), false);
655 else
656 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
657
658 opt_key_offset = TUN_METADATA_OFFSET(nla_len(a));
659 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, nla_data(a),
660 nla_len(a), is_mask);
661 return 0;
662 }
663
664 static int ip_tun_from_nlattr(const struct nlattr *attr,
665 struct sw_flow_match *match, bool is_mask,
666 bool log)
667 {
668 bool ttl = false, ipv4 = false, ipv6 = false;
669 __be16 tun_flags = 0;
670 int opts_type = 0;
671 struct nlattr *a;
672 int rem;
673
674 nla_for_each_nested(a, attr, rem) {
675 int type = nla_type(a);
676 int err;
677
678 if (type > OVS_TUNNEL_KEY_ATTR_MAX) {
679 OVS_NLERR(log, "Tunnel attr %d out of range max %d",
680 type, OVS_TUNNEL_KEY_ATTR_MAX);
681 return -EINVAL;
682 }
683
684 if (!check_attr_len(nla_len(a),
685 ovs_tunnel_key_lens[type].len)) {
686 OVS_NLERR(log, "Tunnel attr %d has unexpected len %d expected %d",
687 type, nla_len(a), ovs_tunnel_key_lens[type].len);
688 return -EINVAL;
689 }
690
691 switch (type) {
692 case OVS_TUNNEL_KEY_ATTR_ID:
693 SW_FLOW_KEY_PUT(match, tun_key.tun_id,
694 nla_get_be64(a), is_mask);
695 tun_flags |= TUNNEL_KEY;
696 break;
697 case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
698 SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.src,
699 nla_get_in_addr(a), is_mask);
700 ipv4 = true;
701 break;
702 case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
703 SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.dst,
704 nla_get_in_addr(a), is_mask);
705 ipv4 = true;
706 break;
707 case OVS_TUNNEL_KEY_ATTR_IPV6_SRC:
708 SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.src,
709 nla_get_in6_addr(a), is_mask);
710 ipv6 = true;
711 break;
712 case OVS_TUNNEL_KEY_ATTR_IPV6_DST:
713 SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.dst,
714 nla_get_in6_addr(a), is_mask);
715 ipv6 = true;
716 break;
717 case OVS_TUNNEL_KEY_ATTR_TOS:
718 SW_FLOW_KEY_PUT(match, tun_key.tos,
719 nla_get_u8(a), is_mask);
720 break;
721 case OVS_TUNNEL_KEY_ATTR_TTL:
722 SW_FLOW_KEY_PUT(match, tun_key.ttl,
723 nla_get_u8(a), is_mask);
724 ttl = true;
725 break;
726 case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
727 tun_flags |= TUNNEL_DONT_FRAGMENT;
728 break;
729 case OVS_TUNNEL_KEY_ATTR_CSUM:
730 tun_flags |= TUNNEL_CSUM;
731 break;
732 case OVS_TUNNEL_KEY_ATTR_TP_SRC:
733 SW_FLOW_KEY_PUT(match, tun_key.tp_src,
734 nla_get_be16(a), is_mask);
735 break;
736 case OVS_TUNNEL_KEY_ATTR_TP_DST:
737 SW_FLOW_KEY_PUT(match, tun_key.tp_dst,
738 nla_get_be16(a), is_mask);
739 break;
740 case OVS_TUNNEL_KEY_ATTR_OAM:
741 tun_flags |= TUNNEL_OAM;
742 break;
743 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
744 if (opts_type) {
745 OVS_NLERR(log, "Multiple metadata blocks provided");
746 return -EINVAL;
747 }
748
749 err = genev_tun_opt_from_nlattr(a, match, is_mask, log);
750 if (err)
751 return err;
752
753 tun_flags |= TUNNEL_GENEVE_OPT;
754 opts_type = type;
755 break;
756 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
757 if (opts_type) {
758 OVS_NLERR(log, "Multiple metadata blocks provided");
759 return -EINVAL;
760 }
761
762 err = vxlan_tun_opt_from_nlattr(a, match, is_mask, log);
763 if (err)
764 return err;
765
766 tun_flags |= TUNNEL_VXLAN_OPT;
767 opts_type = type;
768 break;
769 case OVS_TUNNEL_KEY_ATTR_PAD:
770 break;
771 case OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS:
772 if (opts_type) {
773 OVS_NLERR(log, "Multiple metadata blocks provided");
774 return -EINVAL;
775 }
776
777 err = erspan_tun_opt_from_nlattr(a, match, is_mask,
778 log);
779 if (err)
780 return err;
781
782 tun_flags |= TUNNEL_ERSPAN_OPT;
783 opts_type = type;
784 break;
785 default:
786 OVS_NLERR(log, "Unknown IP tunnel attribute %d",
787 type);
788 return -EINVAL;
789 }
790 }
791
792 SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask);
793 if (is_mask)
794 SW_FLOW_KEY_MEMSET_FIELD(match, tun_proto, 0xff, true);
795 else
796 SW_FLOW_KEY_PUT(match, tun_proto, ipv6 ? AF_INET6 : AF_INET,
797 false);
798
799 if (rem > 0) {
800 OVS_NLERR(log, "IP tunnel attribute has %d unknown bytes.",
801 rem);
802 return -EINVAL;
803 }
804
805 if (ipv4 && ipv6) {
806 OVS_NLERR(log, "Mixed IPv4 and IPv6 tunnel attributes");
807 return -EINVAL;
808 }
809
810 if (!is_mask) {
811 if (!ipv4 && !ipv6) {
812 OVS_NLERR(log, "IP tunnel dst address not specified");
813 return -EINVAL;
814 }
815 if (ipv4 && !match->key->tun_key.u.ipv4.dst) {
816 OVS_NLERR(log, "IPv4 tunnel dst address is zero");
817 return -EINVAL;
818 }
819 if (ipv6 && ipv6_addr_any(&match->key->tun_key.u.ipv6.dst)) {
820 OVS_NLERR(log, "IPv6 tunnel dst address is zero");
821 return -EINVAL;
822 }
823
824 if (!ttl) {
825 OVS_NLERR(log, "IP tunnel TTL not specified.");
826 return -EINVAL;
827 }
828 }
829
830 return opts_type;
831 }
832
833 static int vxlan_opt_to_nlattr(struct sk_buff *skb,
834 const void *tun_opts, int swkey_tun_opts_len)
835 {
836 const struct vxlan_metadata *opts = tun_opts;
837 struct nlattr *nla;
838
839 nla = nla_nest_start(skb, OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS);
840 if (!nla)
841 return -EMSGSIZE;
842
843 if (nla_put_u32(skb, OVS_VXLAN_EXT_GBP, opts->gbp) < 0)
844 return -EMSGSIZE;
845
846 nla_nest_end(skb, nla);
847 return 0;
848 }
849
850 static int __ip_tun_to_nlattr(struct sk_buff *skb,
851 const struct ip_tunnel_key *output,
852 const void *tun_opts, int swkey_tun_opts_len,
853 unsigned short tun_proto)
854 {
855 if (output->tun_flags & TUNNEL_KEY &&
856 nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id,
857 OVS_TUNNEL_KEY_ATTR_PAD))
858 return -EMSGSIZE;
859 switch (tun_proto) {
860 case AF_INET:
861 if (output->u.ipv4.src &&
862 nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC,
863 output->u.ipv4.src))
864 return -EMSGSIZE;
865 if (output->u.ipv4.dst &&
866 nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST,
867 output->u.ipv4.dst))
868 return -EMSGSIZE;
869 break;
870 case AF_INET6:
871 if (!ipv6_addr_any(&output->u.ipv6.src) &&
872 nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_SRC,
873 &output->u.ipv6.src))
874 return -EMSGSIZE;
875 if (!ipv6_addr_any(&output->u.ipv6.dst) &&
876 nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_DST,
877 &output->u.ipv6.dst))
878 return -EMSGSIZE;
879 break;
880 }
881 if (output->tos &&
882 nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->tos))
883 return -EMSGSIZE;
884 if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ttl))
885 return -EMSGSIZE;
886 if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) &&
887 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT))
888 return -EMSGSIZE;
889 if ((output->tun_flags & TUNNEL_CSUM) &&
890 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM))
891 return -EMSGSIZE;
892 if (output->tp_src &&
893 nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_SRC, output->tp_src))
894 return -EMSGSIZE;
895 if (output->tp_dst &&
896 nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_DST, output->tp_dst))
897 return -EMSGSIZE;
898 if ((output->tun_flags & TUNNEL_OAM) &&
899 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM))
900 return -EMSGSIZE;
901 if (swkey_tun_opts_len) {
902 if (output->tun_flags & TUNNEL_GENEVE_OPT &&
903 nla_put(skb, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS,
904 swkey_tun_opts_len, tun_opts))
905 return -EMSGSIZE;
906 else if (output->tun_flags & TUNNEL_VXLAN_OPT &&
907 vxlan_opt_to_nlattr(skb, tun_opts, swkey_tun_opts_len))
908 return -EMSGSIZE;
909 else if (output->tun_flags & TUNNEL_ERSPAN_OPT &&
910 nla_put(skb, OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS,
911 swkey_tun_opts_len, tun_opts))
912 return -EMSGSIZE;
913 }
914
915 return 0;
916 }
917
918 static int ip_tun_to_nlattr(struct sk_buff *skb,
919 const struct ip_tunnel_key *output,
920 const void *tun_opts, int swkey_tun_opts_len,
921 unsigned short tun_proto)
922 {
923 struct nlattr *nla;
924 int err;
925
926 nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL);
927 if (!nla)
928 return -EMSGSIZE;
929
930 err = __ip_tun_to_nlattr(skb, output, tun_opts, swkey_tun_opts_len,
931 tun_proto);
932 if (err)
933 return err;
934
935 nla_nest_end(skb, nla);
936 return 0;
937 }
938
939 int ovs_nla_put_tunnel_info(struct sk_buff *skb,
940 struct ip_tunnel_info *tun_info)
941 {
942 return __ip_tun_to_nlattr(skb, &tun_info->key,
943 ip_tunnel_info_opts(tun_info),
944 tun_info->options_len,
945 ip_tunnel_info_af(tun_info));
946 }
947
948 static int encode_vlan_from_nlattrs(struct sw_flow_match *match,
949 const struct nlattr *a[],
950 bool is_mask, bool inner)
951 {
952 __be16 tci = 0;
953 __be16 tpid = 0;
954
955 if (a[OVS_KEY_ATTR_VLAN])
956 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
957
958 if (a[OVS_KEY_ATTR_ETHERTYPE])
959 tpid = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
960
961 if (likely(!inner)) {
962 SW_FLOW_KEY_PUT(match, eth.vlan.tpid, tpid, is_mask);
963 SW_FLOW_KEY_PUT(match, eth.vlan.tci, tci, is_mask);
964 } else {
965 SW_FLOW_KEY_PUT(match, eth.cvlan.tpid, tpid, is_mask);
966 SW_FLOW_KEY_PUT(match, eth.cvlan.tci, tci, is_mask);
967 }
968 return 0;
969 }
970
971 static int validate_vlan_from_nlattrs(const struct sw_flow_match *match,
972 u64 key_attrs, bool inner,
973 const struct nlattr **a, bool log)
974 {
975 __be16 tci = 0;
976
977 if (!((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) &&
978 (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) &&
979 eth_type_vlan(nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE])))) {
980 /* Not a VLAN. */
981 return 0;
982 }
983
984 if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) &&
985 (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) {
986 OVS_NLERR(log, "Invalid %s frame", (inner) ? "C-VLAN" : "VLAN");
987 return -EINVAL;
988 }
989
990 if (a[OVS_KEY_ATTR_VLAN])
991 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
992
993 if (!(tci & htons(VLAN_TAG_PRESENT))) {
994 if (tci) {
995 OVS_NLERR(log, "%s TCI does not have VLAN_TAG_PRESENT bit set.",
996 (inner) ? "C-VLAN" : "VLAN");
997 return -EINVAL;
998 } else if (nla_len(a[OVS_KEY_ATTR_ENCAP])) {
999 /* Corner case for truncated VLAN header. */
1000 OVS_NLERR(log, "Truncated %s header has non-zero encap attribute.",
1001 (inner) ? "C-VLAN" : "VLAN");
1002 return -EINVAL;
1003 }
1004 }
1005
1006 return 1;
1007 }
1008
1009 static int validate_vlan_mask_from_nlattrs(const struct sw_flow_match *match,
1010 u64 key_attrs, bool inner,
1011 const struct nlattr **a, bool log)
1012 {
1013 __be16 tci = 0;
1014 __be16 tpid = 0;
1015 bool encap_valid = !!(match->key->eth.vlan.tci &
1016 htons(VLAN_TAG_PRESENT));
1017 bool i_encap_valid = !!(match->key->eth.cvlan.tci &
1018 htons(VLAN_TAG_PRESENT));
1019
1020 if (!(key_attrs & (1 << OVS_KEY_ATTR_ENCAP))) {
1021 /* Not a VLAN. */
1022 return 0;
1023 }
1024
1025 if ((!inner && !encap_valid) || (inner && !i_encap_valid)) {
1026 OVS_NLERR(log, "Encap mask attribute is set for non-%s frame.",
1027 (inner) ? "C-VLAN" : "VLAN");
1028 return -EINVAL;
1029 }
1030
1031 if (a[OVS_KEY_ATTR_VLAN])
1032 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
1033
1034 if (a[OVS_KEY_ATTR_ETHERTYPE])
1035 tpid = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
1036
1037 if (tpid != htons(0xffff)) {
1038 OVS_NLERR(log, "Must have an exact match on %s TPID (mask=%x).",
1039 (inner) ? "C-VLAN" : "VLAN", ntohs(tpid));
1040 return -EINVAL;
1041 }
1042 if (!(tci & htons(VLAN_TAG_PRESENT))) {
1043 OVS_NLERR(log, "%s TCI mask does not have exact match for VLAN_TAG_PRESENT bit.",
1044 (inner) ? "C-VLAN" : "VLAN");
1045 return -EINVAL;
1046 }
1047
1048 return 1;
1049 }
1050
1051 static int __parse_vlan_from_nlattrs(struct sw_flow_match *match,
1052 u64 *key_attrs, bool inner,
1053 const struct nlattr **a, bool is_mask,
1054 bool log)
1055 {
1056 int err;
1057 const struct nlattr *encap;
1058
1059 if (!is_mask)
1060 err = validate_vlan_from_nlattrs(match, *key_attrs, inner,
1061 a, log);
1062 else
1063 err = validate_vlan_mask_from_nlattrs(match, *key_attrs, inner,
1064 a, log);
1065 if (err <= 0)
1066 return err;
1067
1068 err = encode_vlan_from_nlattrs(match, a, is_mask, inner);
1069 if (err)
1070 return err;
1071
1072 *key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP);
1073 *key_attrs &= ~(1 << OVS_KEY_ATTR_VLAN);
1074 *key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
1075
1076 encap = a[OVS_KEY_ATTR_ENCAP];
1077
1078 if (!is_mask)
1079 err = parse_flow_nlattrs(encap, a, key_attrs, log);
1080 else
1081 err = parse_flow_mask_nlattrs(encap, a, key_attrs, log);
1082
1083 return err;
1084 }
1085
1086 static int parse_vlan_from_nlattrs(struct sw_flow_match *match,
1087 u64 *key_attrs, const struct nlattr **a,
1088 bool is_mask, bool log)
1089 {
1090 int err;
1091 bool encap_valid = false;
1092
1093 err = __parse_vlan_from_nlattrs(match, key_attrs, false, a,
1094 is_mask, log);
1095 if (err)
1096 return err;
1097
1098 encap_valid = !!(match->key->eth.vlan.tci & htons(VLAN_TAG_PRESENT));
1099 if (encap_valid) {
1100 err = __parse_vlan_from_nlattrs(match, key_attrs, true, a,
1101 is_mask, log);
1102 if (err)
1103 return err;
1104 }
1105
1106 return 0;
1107 }
1108
1109 static int parse_eth_type_from_nlattrs(struct sw_flow_match *match,
1110 u64 *attrs, const struct nlattr **a,
1111 bool is_mask, bool log)
1112 {
1113 __be16 eth_type;
1114
1115 eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
1116 if (is_mask) {
1117 /* Always exact match EtherType. */
1118 eth_type = htons(0xffff);
1119 } else if (!eth_proto_is_802_3(eth_type)) {
1120 OVS_NLERR(log, "EtherType %x is less than min %x",
1121 ntohs(eth_type), ETH_P_802_3_MIN);
1122 return -EINVAL;
1123 }
1124
1125 SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask);
1126 *attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
1127 return 0;
1128 }
1129
1130 static int metadata_from_nlattrs(struct net *net, struct sw_flow_match *match,
1131 u64 *attrs, const struct nlattr **a,
1132 bool is_mask, bool log)
1133 {
1134 u8 mac_proto = MAC_PROTO_ETHERNET;
1135
1136 if (*attrs & (1 << OVS_KEY_ATTR_DP_HASH)) {
1137 u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]);
1138
1139 SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask);
1140 *attrs &= ~(1 << OVS_KEY_ATTR_DP_HASH);
1141 }
1142
1143 if (*attrs & (1 << OVS_KEY_ATTR_RECIRC_ID)) {
1144 u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]);
1145
1146 SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask);
1147 *attrs &= ~(1 << OVS_KEY_ATTR_RECIRC_ID);
1148 }
1149
1150 if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) {
1151 SW_FLOW_KEY_PUT(match, phy.priority,
1152 nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask);
1153 *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY);
1154 }
1155
1156 if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) {
1157 u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]);
1158
1159 if (is_mask) {
1160 in_port = 0xffffffff; /* Always exact match in_port. */
1161 } else if (in_port >= DP_MAX_PORTS) {
1162 OVS_NLERR(log, "Port %d exceeds max allowable %d",
1163 in_port, DP_MAX_PORTS);
1164 return -EINVAL;
1165 }
1166
1167 SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask);
1168 *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT);
1169 } else if (!is_mask) {
1170 SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask);
1171 }
1172
1173 if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) {
1174 uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]);
1175
1176 SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask);
1177 *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK);
1178 }
1179 if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) {
1180 if (ip_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match,
1181 is_mask, log) < 0)
1182 return -EINVAL;
1183 *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL);
1184 }
1185
1186 if (*attrs & (1 << OVS_KEY_ATTR_CT_STATE) &&
1187 ovs_ct_verify(net, OVS_KEY_ATTR_CT_STATE)) {
1188 u32 ct_state = nla_get_u32(a[OVS_KEY_ATTR_CT_STATE]);
1189
1190 if (ct_state & ~CT_SUPPORTED_MASK) {
1191 OVS_NLERR(log, "ct_state flags %08x unsupported",
1192 ct_state);
1193 return -EINVAL;
1194 }
1195
1196 SW_FLOW_KEY_PUT(match, ct_state, ct_state, is_mask);
1197 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_STATE);
1198 }
1199 if (*attrs & (1 << OVS_KEY_ATTR_CT_ZONE) &&
1200 ovs_ct_verify(net, OVS_KEY_ATTR_CT_ZONE)) {
1201 u16 ct_zone = nla_get_u16(a[OVS_KEY_ATTR_CT_ZONE]);
1202
1203 SW_FLOW_KEY_PUT(match, ct_zone, ct_zone, is_mask);
1204 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ZONE);
1205 }
1206 if (*attrs & (1 << OVS_KEY_ATTR_CT_MARK) &&
1207 ovs_ct_verify(net, OVS_KEY_ATTR_CT_MARK)) {
1208 u32 mark = nla_get_u32(a[OVS_KEY_ATTR_CT_MARK]);
1209
1210 SW_FLOW_KEY_PUT(match, ct.mark, mark, is_mask);
1211 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_MARK);
1212 }
1213 if (*attrs & (1 << OVS_KEY_ATTR_CT_LABELS) &&
1214 ovs_ct_verify(net, OVS_KEY_ATTR_CT_LABELS)) {
1215 const struct ovs_key_ct_labels *cl;
1216
1217 cl = nla_data(a[OVS_KEY_ATTR_CT_LABELS]);
1218 SW_FLOW_KEY_MEMCPY(match, ct.labels, cl->ct_labels,
1219 sizeof(*cl), is_mask);
1220 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_LABELS);
1221 }
1222 if (*attrs & (1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4)) {
1223 const struct ovs_key_ct_tuple_ipv4 *ct;
1224
1225 ct = nla_data(a[OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4]);
1226
1227 SW_FLOW_KEY_PUT(match, ipv4.ct_orig.src, ct->ipv4_src, is_mask);
1228 SW_FLOW_KEY_PUT(match, ipv4.ct_orig.dst, ct->ipv4_dst, is_mask);
1229 SW_FLOW_KEY_PUT(match, ct.orig_tp.src, ct->src_port, is_mask);
1230 SW_FLOW_KEY_PUT(match, ct.orig_tp.dst, ct->dst_port, is_mask);
1231 SW_FLOW_KEY_PUT(match, ct_orig_proto, ct->ipv4_proto, is_mask);
1232 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4);
1233 }
1234 if (*attrs & (1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6)) {
1235 const struct ovs_key_ct_tuple_ipv6 *ct;
1236
1237 ct = nla_data(a[OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6]);
1238
1239 SW_FLOW_KEY_MEMCPY(match, ipv6.ct_orig.src, &ct->ipv6_src,
1240 sizeof(match->key->ipv6.ct_orig.src),
1241 is_mask);
1242 SW_FLOW_KEY_MEMCPY(match, ipv6.ct_orig.dst, &ct->ipv6_dst,
1243 sizeof(match->key->ipv6.ct_orig.dst),
1244 is_mask);
1245 SW_FLOW_KEY_PUT(match, ct.orig_tp.src, ct->src_port, is_mask);
1246 SW_FLOW_KEY_PUT(match, ct.orig_tp.dst, ct->dst_port, is_mask);
1247 SW_FLOW_KEY_PUT(match, ct_orig_proto, ct->ipv6_proto, is_mask);
1248 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6);
1249 }
1250
1251 /* For layer 3 packets the Ethernet type is provided
1252 * and treated as metadata but no MAC addresses are provided.
1253 */
1254 if (!(*attrs & (1ULL << OVS_KEY_ATTR_ETHERNET)) &&
1255 (*attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)))
1256 mac_proto = MAC_PROTO_NONE;
1257
1258 /* Always exact match mac_proto */
1259 SW_FLOW_KEY_PUT(match, mac_proto, is_mask ? 0xff : mac_proto, is_mask);
1260
1261 if (mac_proto == MAC_PROTO_NONE)
1262 return parse_eth_type_from_nlattrs(match, attrs, a, is_mask,
1263 log);
1264
1265 return 0;
1266 }
1267
1268 int nsh_hdr_from_nlattr(const struct nlattr *attr,
1269 struct nshhdr *nh, size_t size)
1270 {
1271 struct nlattr *a;
1272 int rem;
1273 u8 flags = 0;
1274 u8 ttl = 0;
1275 int mdlen = 0;
1276
1277 /* validate_nsh has check this, so we needn't do duplicate check here
1278 */
1279 if (size < NSH_BASE_HDR_LEN)
1280 return -ENOBUFS;
1281
1282 nla_for_each_nested(a, attr, rem) {
1283 int type = nla_type(a);
1284
1285 switch (type) {
1286 case OVS_NSH_KEY_ATTR_BASE: {
1287 const struct ovs_nsh_key_base *base = nla_data(a);
1288
1289 flags = base->flags;
1290 ttl = base->ttl;
1291 nh->np = base->np;
1292 nh->mdtype = base->mdtype;
1293 nh->path_hdr = base->path_hdr;
1294 break;
1295 }
1296 case OVS_NSH_KEY_ATTR_MD1:
1297 mdlen = nla_len(a);
1298 if (mdlen > size - NSH_BASE_HDR_LEN)
1299 return -ENOBUFS;
1300 memcpy(&nh->md1, nla_data(a), mdlen);
1301 break;
1302
1303 case OVS_NSH_KEY_ATTR_MD2:
1304 mdlen = nla_len(a);
1305 if (mdlen > size - NSH_BASE_HDR_LEN)
1306 return -ENOBUFS;
1307 memcpy(&nh->md2, nla_data(a), mdlen);
1308 break;
1309
1310 default:
1311 return -EINVAL;
1312 }
1313 }
1314
1315 /* nsh header length = NSH_BASE_HDR_LEN + mdlen */
1316 nh->ver_flags_ttl_len = 0;
1317 nsh_set_flags_ttl_len(nh, flags, ttl, NSH_BASE_HDR_LEN + mdlen);
1318
1319 return 0;
1320 }
1321
1322 int nsh_key_from_nlattr(const struct nlattr *attr,
1323 struct ovs_key_nsh *nsh, struct ovs_key_nsh *nsh_mask)
1324 {
1325 struct nlattr *a;
1326 int rem;
1327
1328 /* validate_nsh has check this, so we needn't do duplicate check here
1329 */
1330 nla_for_each_nested(a, attr, rem) {
1331 int type = nla_type(a);
1332
1333 switch (type) {
1334 case OVS_NSH_KEY_ATTR_BASE: {
1335 const struct ovs_nsh_key_base *base = nla_data(a);
1336 const struct ovs_nsh_key_base *base_mask = base + 1;
1337
1338 nsh->base = *base;
1339 nsh_mask->base = *base_mask;
1340 break;
1341 }
1342 case OVS_NSH_KEY_ATTR_MD1: {
1343 const struct ovs_nsh_key_md1 *md1 = nla_data(a);
1344 const struct ovs_nsh_key_md1 *md1_mask = md1 + 1;
1345
1346 memcpy(nsh->context, md1->context, sizeof(*md1));
1347 memcpy(nsh_mask->context, md1_mask->context,
1348 sizeof(*md1_mask));
1349 break;
1350 }
1351 case OVS_NSH_KEY_ATTR_MD2:
1352 /* Not supported yet */
1353 return -ENOTSUPP;
1354 default:
1355 return -EINVAL;
1356 }
1357 }
1358
1359 return 0;
1360 }
1361
1362 static int nsh_key_put_from_nlattr(const struct nlattr *attr,
1363 struct sw_flow_match *match, bool is_mask,
1364 bool is_push_nsh, bool log)
1365 {
1366 struct nlattr *a;
1367 int rem;
1368 bool has_base = false;
1369 bool has_md1 = false;
1370 bool has_md2 = false;
1371 u8 mdtype = 0;
1372 int mdlen = 0;
1373
1374 if (WARN_ON(is_push_nsh && is_mask))
1375 return -EINVAL;
1376
1377 nla_for_each_nested(a, attr, rem) {
1378 int type = nla_type(a);
1379 int i;
1380
1381 if (type > OVS_NSH_KEY_ATTR_MAX) {
1382 OVS_NLERR(log, "nsh attr %d is out of range max %d",
1383 type, OVS_NSH_KEY_ATTR_MAX);
1384 return -EINVAL;
1385 }
1386
1387 if (!check_attr_len(nla_len(a),
1388 ovs_nsh_key_attr_lens[type].len)) {
1389 OVS_NLERR(
1390 log,
1391 "nsh attr %d has unexpected len %d expected %d",
1392 type,
1393 nla_len(a),
1394 ovs_nsh_key_attr_lens[type].len
1395 );
1396 return -EINVAL;
1397 }
1398
1399 switch (type) {
1400 case OVS_NSH_KEY_ATTR_BASE: {
1401 const struct ovs_nsh_key_base *base = nla_data(a);
1402
1403 has_base = true;
1404 mdtype = base->mdtype;
1405 SW_FLOW_KEY_PUT(match, nsh.base.flags,
1406 base->flags, is_mask);
1407 SW_FLOW_KEY_PUT(match, nsh.base.ttl,
1408 base->ttl, is_mask);
1409 SW_FLOW_KEY_PUT(match, nsh.base.mdtype,
1410 base->mdtype, is_mask);
1411 SW_FLOW_KEY_PUT(match, nsh.base.np,
1412 base->np, is_mask);
1413 SW_FLOW_KEY_PUT(match, nsh.base.path_hdr,
1414 base->path_hdr, is_mask);
1415 break;
1416 }
1417 case OVS_NSH_KEY_ATTR_MD1: {
1418 const struct ovs_nsh_key_md1 *md1 = nla_data(a);
1419
1420 has_md1 = true;
1421 for (i = 0; i < NSH_MD1_CONTEXT_SIZE; i++)
1422 SW_FLOW_KEY_PUT(match, nsh.context[i],
1423 md1->context[i], is_mask);
1424 break;
1425 }
1426 case OVS_NSH_KEY_ATTR_MD2:
1427 if (!is_push_nsh) /* Not supported MD type 2 yet */
1428 return -ENOTSUPP;
1429
1430 has_md2 = true;
1431 mdlen = nla_len(a);
1432 if (mdlen > NSH_CTX_HDRS_MAX_LEN || mdlen <= 0) {
1433 OVS_NLERR(
1434 log,
1435 "Invalid MD length %d for MD type %d",
1436 mdlen,
1437 mdtype
1438 );
1439 return -EINVAL;
1440 }
1441 break;
1442 default:
1443 OVS_NLERR(log, "Unknown nsh attribute %d",
1444 type);
1445 return -EINVAL;
1446 }
1447 }
1448
1449 if (rem > 0) {
1450 OVS_NLERR(log, "nsh attribute has %d unknown bytes.", rem);
1451 return -EINVAL;
1452 }
1453
1454 if (has_md1 && has_md2) {
1455 OVS_NLERR(
1456 1,
1457 "invalid nsh attribute: md1 and md2 are exclusive."
1458 );
1459 return -EINVAL;
1460 }
1461
1462 if (!is_mask) {
1463 if ((has_md1 && mdtype != NSH_M_TYPE1) ||
1464 (has_md2 && mdtype != NSH_M_TYPE2)) {
1465 OVS_NLERR(1, "nsh attribute has unmatched MD type %d.",
1466 mdtype);
1467 return -EINVAL;
1468 }
1469
1470 if (is_push_nsh &&
1471 (!has_base || (!has_md1 && !has_md2))) {
1472 OVS_NLERR(
1473 1,
1474 "push_nsh: missing base or metadata attributes"
1475 );
1476 return -EINVAL;
1477 }
1478 }
1479
1480 return 0;
1481 }
1482
1483 static int ovs_key_from_nlattrs(struct net *net, struct sw_flow_match *match,
1484 u64 attrs, const struct nlattr **a,
1485 bool is_mask, bool log)
1486 {
1487 int err;
1488
1489 err = metadata_from_nlattrs(net, match, &attrs, a, is_mask, log);
1490 if (err)
1491 return err;
1492
1493 if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) {
1494 const struct ovs_key_ethernet *eth_key;
1495
1496 eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]);
1497 SW_FLOW_KEY_MEMCPY(match, eth.src,
1498 eth_key->eth_src, ETH_ALEN, is_mask);
1499 SW_FLOW_KEY_MEMCPY(match, eth.dst,
1500 eth_key->eth_dst, ETH_ALEN, is_mask);
1501 attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET);
1502
1503 if (attrs & (1 << OVS_KEY_ATTR_VLAN)) {
1504 /* VLAN attribute is always parsed before getting here since it
1505 * may occur multiple times.
1506 */
1507 OVS_NLERR(log, "VLAN attribute unexpected.");
1508 return -EINVAL;
1509 }
1510
1511 if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) {
1512 err = parse_eth_type_from_nlattrs(match, &attrs, a, is_mask,
1513 log);
1514 if (err)
1515 return err;
1516 } else if (!is_mask) {
1517 SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask);
1518 }
1519 } else if (!match->key->eth.type) {
1520 OVS_NLERR(log, "Either Ethernet header or EtherType is required.");
1521 return -EINVAL;
1522 }
1523
1524 if (attrs & (1 << OVS_KEY_ATTR_IPV4)) {
1525 const struct ovs_key_ipv4 *ipv4_key;
1526
1527 ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]);
1528 if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) {
1529 OVS_NLERR(log, "IPv4 frag type %d is out of range max %d",
1530 ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX);
1531 return -EINVAL;
1532 }
1533 SW_FLOW_KEY_PUT(match, ip.proto,
1534 ipv4_key->ipv4_proto, is_mask);
1535 SW_FLOW_KEY_PUT(match, ip.tos,
1536 ipv4_key->ipv4_tos, is_mask);
1537 SW_FLOW_KEY_PUT(match, ip.ttl,
1538 ipv4_key->ipv4_ttl, is_mask);
1539 SW_FLOW_KEY_PUT(match, ip.frag,
1540 ipv4_key->ipv4_frag, is_mask);
1541 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
1542 ipv4_key->ipv4_src, is_mask);
1543 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
1544 ipv4_key->ipv4_dst, is_mask);
1545 attrs &= ~(1 << OVS_KEY_ATTR_IPV4);
1546 }
1547
1548 if (attrs & (1 << OVS_KEY_ATTR_IPV6)) {
1549 const struct ovs_key_ipv6 *ipv6_key;
1550
1551 ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]);
1552 if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) {
1553 OVS_NLERR(log, "IPv6 frag type %d is out of range max %d",
1554 ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX);
1555 return -EINVAL;
1556 }
1557
1558 if (!is_mask && ipv6_key->ipv6_label & htonl(0xFFF00000)) {
1559 OVS_NLERR(log, "IPv6 flow label %x is out of range (max=%x)",
1560 ntohl(ipv6_key->ipv6_label), (1 << 20) - 1);
1561 return -EINVAL;
1562 }
1563
1564 SW_FLOW_KEY_PUT(match, ipv6.label,
1565 ipv6_key->ipv6_label, is_mask);
1566 SW_FLOW_KEY_PUT(match, ip.proto,
1567 ipv6_key->ipv6_proto, is_mask);
1568 SW_FLOW_KEY_PUT(match, ip.tos,
1569 ipv6_key->ipv6_tclass, is_mask);
1570 SW_FLOW_KEY_PUT(match, ip.ttl,
1571 ipv6_key->ipv6_hlimit, is_mask);
1572 SW_FLOW_KEY_PUT(match, ip.frag,
1573 ipv6_key->ipv6_frag, is_mask);
1574 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src,
1575 ipv6_key->ipv6_src,
1576 sizeof(match->key->ipv6.addr.src),
1577 is_mask);
1578 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst,
1579 ipv6_key->ipv6_dst,
1580 sizeof(match->key->ipv6.addr.dst),
1581 is_mask);
1582
1583 attrs &= ~(1 << OVS_KEY_ATTR_IPV6);
1584 }
1585
1586 if (attrs & (1 << OVS_KEY_ATTR_ARP)) {
1587 const struct ovs_key_arp *arp_key;
1588
1589 arp_key = nla_data(a[OVS_KEY_ATTR_ARP]);
1590 if (!is_mask && (arp_key->arp_op & htons(0xff00))) {
1591 OVS_NLERR(log, "Unknown ARP opcode (opcode=%d).",
1592 arp_key->arp_op);
1593 return -EINVAL;
1594 }
1595
1596 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
1597 arp_key->arp_sip, is_mask);
1598 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
1599 arp_key->arp_tip, is_mask);
1600 SW_FLOW_KEY_PUT(match, ip.proto,
1601 ntohs(arp_key->arp_op), is_mask);
1602 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha,
1603 arp_key->arp_sha, ETH_ALEN, is_mask);
1604 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha,
1605 arp_key->arp_tha, ETH_ALEN, is_mask);
1606
1607 attrs &= ~(1 << OVS_KEY_ATTR_ARP);
1608 }
1609
1610 if (attrs & (1 << OVS_KEY_ATTR_NSH)) {
1611 if (nsh_key_put_from_nlattr(a[OVS_KEY_ATTR_NSH], match,
1612 is_mask, false, log) < 0)
1613 return -EINVAL;
1614 attrs &= ~(1 << OVS_KEY_ATTR_NSH);
1615 }
1616
1617 if (attrs & (1 << OVS_KEY_ATTR_MPLS)) {
1618 const struct ovs_key_mpls *mpls_key;
1619
1620 mpls_key = nla_data(a[OVS_KEY_ATTR_MPLS]);
1621 SW_FLOW_KEY_PUT(match, mpls.top_lse,
1622 mpls_key->mpls_lse, is_mask);
1623
1624 attrs &= ~(1 << OVS_KEY_ATTR_MPLS);
1625 }
1626
1627 if (attrs & (1 << OVS_KEY_ATTR_TCP)) {
1628 const struct ovs_key_tcp *tcp_key;
1629
1630 tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]);
1631 SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask);
1632 SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask);
1633 attrs &= ~(1 << OVS_KEY_ATTR_TCP);
1634 }
1635
1636 if (attrs & (1 << OVS_KEY_ATTR_TCP_FLAGS)) {
1637 SW_FLOW_KEY_PUT(match, tp.flags,
1638 nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]),
1639 is_mask);
1640 attrs &= ~(1 << OVS_KEY_ATTR_TCP_FLAGS);
1641 }
1642
1643 if (attrs & (1 << OVS_KEY_ATTR_UDP)) {
1644 const struct ovs_key_udp *udp_key;
1645
1646 udp_key = nla_data(a[OVS_KEY_ATTR_UDP]);
1647 SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask);
1648 SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask);
1649 attrs &= ~(1 << OVS_KEY_ATTR_UDP);
1650 }
1651
1652 if (attrs & (1 << OVS_KEY_ATTR_SCTP)) {
1653 const struct ovs_key_sctp *sctp_key;
1654
1655 sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]);
1656 SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask);
1657 SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask);
1658 attrs &= ~(1 << OVS_KEY_ATTR_SCTP);
1659 }
1660
1661 if (attrs & (1 << OVS_KEY_ATTR_ICMP)) {
1662 const struct ovs_key_icmp *icmp_key;
1663
1664 icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]);
1665 SW_FLOW_KEY_PUT(match, tp.src,
1666 htons(icmp_key->icmp_type), is_mask);
1667 SW_FLOW_KEY_PUT(match, tp.dst,
1668 htons(icmp_key->icmp_code), is_mask);
1669 attrs &= ~(1 << OVS_KEY_ATTR_ICMP);
1670 }
1671
1672 if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) {
1673 const struct ovs_key_icmpv6 *icmpv6_key;
1674
1675 icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]);
1676 SW_FLOW_KEY_PUT(match, tp.src,
1677 htons(icmpv6_key->icmpv6_type), is_mask);
1678 SW_FLOW_KEY_PUT(match, tp.dst,
1679 htons(icmpv6_key->icmpv6_code), is_mask);
1680 attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6);
1681 }
1682
1683 if (attrs & (1 << OVS_KEY_ATTR_ND)) {
1684 const struct ovs_key_nd *nd_key;
1685
1686 nd_key = nla_data(a[OVS_KEY_ATTR_ND]);
1687 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target,
1688 nd_key->nd_target,
1689 sizeof(match->key->ipv6.nd.target),
1690 is_mask);
1691 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll,
1692 nd_key->nd_sll, ETH_ALEN, is_mask);
1693 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll,
1694 nd_key->nd_tll, ETH_ALEN, is_mask);
1695 attrs &= ~(1 << OVS_KEY_ATTR_ND);
1696 }
1697
1698 if (attrs != 0) {
1699 OVS_NLERR(log, "Unknown key attributes %llx",
1700 (unsigned long long)attrs);
1701 return -EINVAL;
1702 }
1703
1704 return 0;
1705 }
1706
1707 static void nlattr_set(struct nlattr *attr, u8 val,
1708 const struct ovs_len_tbl *tbl)
1709 {
1710 struct nlattr *nla;
1711 int rem;
1712
1713 /* The nlattr stream should already have been validated */
1714 nla_for_each_nested(nla, attr, rem) {
1715 if (tbl[nla_type(nla)].len == OVS_ATTR_NESTED)
1716 nlattr_set(nla, val, tbl[nla_type(nla)].next ? : tbl);
1717 else
1718 memset(nla_data(nla), val, nla_len(nla));
1719
1720 if (nla_type(nla) == OVS_KEY_ATTR_CT_STATE)
1721 *(u32 *)nla_data(nla) &= CT_SUPPORTED_MASK;
1722 }
1723 }
1724
1725 static void mask_set_nlattr(struct nlattr *attr, u8 val)
1726 {
1727 nlattr_set(attr, val, ovs_key_lens);
1728 }
1729
1730 /**
1731 * ovs_nla_get_match - parses Netlink attributes into a flow key and
1732 * mask. In case the 'mask' is NULL, the flow is treated as exact match
1733 * flow. Otherwise, it is treated as a wildcarded flow, except the mask
1734 * does not include any don't care bit.
1735 * @net: Used to determine per-namespace field support.
1736 * @match: receives the extracted flow match information.
1737 * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
1738 * sequence. The fields should of the packet that triggered the creation
1739 * of this flow.
1740 * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink
1741 * attribute specifies the mask field of the wildcarded flow.
1742 * @log: Boolean to allow kernel error logging. Normally true, but when
1743 * probing for feature compatibility this should be passed in as false to
1744 * suppress unnecessary error logging.
1745 */
1746 int ovs_nla_get_match(struct net *net, struct sw_flow_match *match,
1747 const struct nlattr *nla_key,
1748 const struct nlattr *nla_mask,
1749 bool log)
1750 {
1751 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
1752 struct nlattr *newmask = NULL;
1753 u64 key_attrs = 0;
1754 u64 mask_attrs = 0;
1755 int err;
1756
1757 err = parse_flow_nlattrs(nla_key, a, &key_attrs, log);
1758 if (err)
1759 return err;
1760
1761 err = parse_vlan_from_nlattrs(match, &key_attrs, a, false, log);
1762 if (err)
1763 return err;
1764
1765 err = ovs_key_from_nlattrs(net, match, key_attrs, a, false, log);
1766 if (err)
1767 return err;
1768
1769 if (match->mask) {
1770 if (!nla_mask) {
1771 /* Create an exact match mask. We need to set to 0xff
1772 * all the 'match->mask' fields that have been touched
1773 * in 'match->key'. We cannot simply memset
1774 * 'match->mask', because padding bytes and fields not
1775 * specified in 'match->key' should be left to 0.
1776 * Instead, we use a stream of netlink attributes,
1777 * copied from 'key' and set to 0xff.
1778 * ovs_key_from_nlattrs() will take care of filling
1779 * 'match->mask' appropriately.
1780 */
1781 newmask = kmemdup(nla_key,
1782 nla_total_size(nla_len(nla_key)),
1783 GFP_KERNEL);
1784 if (!newmask)
1785 return -ENOMEM;
1786
1787 mask_set_nlattr(newmask, 0xff);
1788
1789 /* The userspace does not send tunnel attributes that
1790 * are 0, but we should not wildcard them nonetheless.
1791 */
1792 if (match->key->tun_proto)
1793 SW_FLOW_KEY_MEMSET_FIELD(match, tun_key,
1794 0xff, true);
1795
1796 nla_mask = newmask;
1797 }
1798
1799 err = parse_flow_mask_nlattrs(nla_mask, a, &mask_attrs, log);
1800 if (err)
1801 goto free_newmask;
1802
1803 /* Always match on tci. */
1804 SW_FLOW_KEY_PUT(match, eth.vlan.tci, htons(0xffff), true);
1805 SW_FLOW_KEY_PUT(match, eth.cvlan.tci, htons(0xffff), true);
1806
1807 err = parse_vlan_from_nlattrs(match, &mask_attrs, a, true, log);
1808 if (err)
1809 goto free_newmask;
1810
1811 err = ovs_key_from_nlattrs(net, match, mask_attrs, a, true,
1812 log);
1813 if (err)
1814 goto free_newmask;
1815 }
1816
1817 if (!match_validate(match, key_attrs, mask_attrs, log))
1818 err = -EINVAL;
1819
1820 free_newmask:
1821 kfree(newmask);
1822 return err;
1823 }
1824
1825 static size_t get_ufid_len(const struct nlattr *attr, bool log)
1826 {
1827 size_t len;
1828
1829 if (!attr)
1830 return 0;
1831
1832 len = nla_len(attr);
1833 if (len < 1 || len > MAX_UFID_LENGTH) {
1834 OVS_NLERR(log, "ufid size %u bytes exceeds the range (1, %d)",
1835 nla_len(attr), MAX_UFID_LENGTH);
1836 return 0;
1837 }
1838
1839 return len;
1840 }
1841
1842 /* Initializes 'flow->ufid', returning true if 'attr' contains a valid UFID,
1843 * or false otherwise.
1844 */
1845 bool ovs_nla_get_ufid(struct sw_flow_id *sfid, const struct nlattr *attr,
1846 bool log)
1847 {
1848 sfid->ufid_len = get_ufid_len(attr, log);
1849 if (sfid->ufid_len)
1850 memcpy(sfid->ufid, nla_data(attr), sfid->ufid_len);
1851
1852 return sfid->ufid_len;
1853 }
1854
1855 int ovs_nla_get_identifier(struct sw_flow_id *sfid, const struct nlattr *ufid,
1856 const struct sw_flow_key *key, bool log)
1857 {
1858 struct sw_flow_key *new_key;
1859
1860 if (ovs_nla_get_ufid(sfid, ufid, log))
1861 return 0;
1862
1863 /* If UFID was not provided, use unmasked key. */
1864 new_key = kmalloc(sizeof(*new_key), GFP_KERNEL);
1865 if (!new_key)
1866 return -ENOMEM;
1867 memcpy(new_key, key, sizeof(*key));
1868 sfid->unmasked_key = new_key;
1869
1870 return 0;
1871 }
1872
1873 u32 ovs_nla_get_ufid_flags(const struct nlattr *attr)
1874 {
1875 return attr ? nla_get_u32(attr) : 0;
1876 }
1877
1878 /**
1879 * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key.
1880 * @net: Network namespace.
1881 * @key: Receives extracted in_port, priority, tun_key, skb_mark and conntrack
1882 * metadata.
1883 * @a: Array of netlink attributes holding parsed %OVS_KEY_ATTR_* Netlink
1884 * attributes.
1885 * @attrs: Bit mask for the netlink attributes included in @a.
1886 * @log: Boolean to allow kernel error logging. Normally true, but when
1887 * probing for feature compatibility this should be passed in as false to
1888 * suppress unnecessary error logging.
1889 *
1890 * This parses a series of Netlink attributes that form a flow key, which must
1891 * take the same form accepted by flow_from_nlattrs(), but only enough of it to
1892 * get the metadata, that is, the parts of the flow key that cannot be
1893 * extracted from the packet itself.
1894 *
1895 * This must be called before the packet key fields are filled in 'key'.
1896 */
1897
1898 int ovs_nla_get_flow_metadata(struct net *net,
1899 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1],
1900 u64 attrs, struct sw_flow_key *key, bool log)
1901 {
1902 struct sw_flow_match match;
1903
1904 memset(&match, 0, sizeof(match));
1905 match.key = key;
1906
1907 key->ct_state = 0;
1908 key->ct_zone = 0;
1909 key->ct_orig_proto = 0;
1910 memset(&key->ct, 0, sizeof(key->ct));
1911 memset(&key->ipv4.ct_orig, 0, sizeof(key->ipv4.ct_orig));
1912 memset(&key->ipv6.ct_orig, 0, sizeof(key->ipv6.ct_orig));
1913
1914 key->phy.in_port = DP_MAX_PORTS;
1915
1916 return metadata_from_nlattrs(net, &match, &attrs, a, false, log);
1917 }
1918
1919 static int ovs_nla_put_vlan(struct sk_buff *skb, const struct vlan_head *vh,
1920 bool is_mask)
1921 {
1922 __be16 eth_type = !is_mask ? vh->tpid : htons(0xffff);
1923
1924 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) ||
1925 nla_put_be16(skb, OVS_KEY_ATTR_VLAN, vh->tci))
1926 return -EMSGSIZE;
1927 return 0;
1928 }
1929
1930 static int nsh_key_to_nlattr(const struct ovs_key_nsh *nsh, bool is_mask,
1931 struct sk_buff *skb)
1932 {
1933 struct nlattr *start;
1934
1935 start = nla_nest_start(skb, OVS_KEY_ATTR_NSH);
1936 if (!start)
1937 return -EMSGSIZE;
1938
1939 if (nla_put(skb, OVS_NSH_KEY_ATTR_BASE, sizeof(nsh->base), &nsh->base))
1940 goto nla_put_failure;
1941
1942 if (is_mask || nsh->base.mdtype == NSH_M_TYPE1) {
1943 if (nla_put(skb, OVS_NSH_KEY_ATTR_MD1,
1944 sizeof(nsh->context), nsh->context))
1945 goto nla_put_failure;
1946 }
1947
1948 /* Don't support MD type 2 yet */
1949
1950 nla_nest_end(skb, start);
1951
1952 return 0;
1953
1954 nla_put_failure:
1955 return -EMSGSIZE;
1956 }
1957
1958 static int __ovs_nla_put_key(const struct sw_flow_key *swkey,
1959 const struct sw_flow_key *output, bool is_mask,
1960 struct sk_buff *skb)
1961 {
1962 struct ovs_key_ethernet *eth_key;
1963 struct nlattr *nla;
1964 struct nlattr *encap = NULL;
1965 struct nlattr *in_encap = NULL;
1966
1967 if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id))
1968 goto nla_put_failure;
1969
1970 if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash))
1971 goto nla_put_failure;
1972
1973 if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority))
1974 goto nla_put_failure;
1975
1976 if ((swkey->tun_proto || is_mask)) {
1977 const void *opts = NULL;
1978
1979 if (output->tun_key.tun_flags & TUNNEL_OPTIONS_PRESENT)
1980 opts = TUN_METADATA_OPTS(output, swkey->tun_opts_len);
1981
1982 if (ip_tun_to_nlattr(skb, &output->tun_key, opts,
1983 swkey->tun_opts_len, swkey->tun_proto))
1984 goto nla_put_failure;
1985 }
1986
1987 if (swkey->phy.in_port == DP_MAX_PORTS) {
1988 if (is_mask && (output->phy.in_port == 0xffff))
1989 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff))
1990 goto nla_put_failure;
1991 } else {
1992 u16 upper_u16;
1993 upper_u16 = !is_mask ? 0 : 0xffff;
1994
1995 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT,
1996 (upper_u16 << 16) | output->phy.in_port))
1997 goto nla_put_failure;
1998 }
1999
2000 if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark))
2001 goto nla_put_failure;
2002
2003 if (ovs_ct_put_key(swkey, output, skb))
2004 goto nla_put_failure;
2005
2006 if (ovs_key_mac_proto(swkey) == MAC_PROTO_ETHERNET) {
2007 nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key));
2008 if (!nla)
2009 goto nla_put_failure;
2010
2011 eth_key = nla_data(nla);
2012 ether_addr_copy(eth_key->eth_src, output->eth.src);
2013 ether_addr_copy(eth_key->eth_dst, output->eth.dst);
2014
2015 if (swkey->eth.vlan.tci || eth_type_vlan(swkey->eth.type)) {
2016 if (ovs_nla_put_vlan(skb, &output->eth.vlan, is_mask))
2017 goto nla_put_failure;
2018 encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
2019 if (!swkey->eth.vlan.tci)
2020 goto unencap;
2021
2022 if (swkey->eth.cvlan.tci || eth_type_vlan(swkey->eth.type)) {
2023 if (ovs_nla_put_vlan(skb, &output->eth.cvlan, is_mask))
2024 goto nla_put_failure;
2025 in_encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
2026 if (!swkey->eth.cvlan.tci)
2027 goto unencap;
2028 }
2029 }
2030
2031 if (swkey->eth.type == htons(ETH_P_802_2)) {
2032 /*
2033 * Ethertype 802.2 is represented in the netlink with omitted
2034 * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and
2035 * 0xffff in the mask attribute. Ethertype can also
2036 * be wildcarded.
2037 */
2038 if (is_mask && output->eth.type)
2039 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE,
2040 output->eth.type))
2041 goto nla_put_failure;
2042 goto unencap;
2043 }
2044 }
2045
2046 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type))
2047 goto nla_put_failure;
2048
2049 if (eth_type_vlan(swkey->eth.type)) {
2050 /* There are 3 VLAN tags, we don't know anything about the rest
2051 * of the packet, so truncate here.
2052 */
2053 WARN_ON_ONCE(!(encap && in_encap));
2054 goto unencap;
2055 }
2056
2057 if (swkey->eth.type == htons(ETH_P_IP)) {
2058 struct ovs_key_ipv4 *ipv4_key;
2059
2060 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key));
2061 if (!nla)
2062 goto nla_put_failure;
2063 ipv4_key = nla_data(nla);
2064 ipv4_key->ipv4_src = output->ipv4.addr.src;
2065 ipv4_key->ipv4_dst = output->ipv4.addr.dst;
2066 ipv4_key->ipv4_proto = output->ip.proto;
2067 ipv4_key->ipv4_tos = output->ip.tos;
2068 ipv4_key->ipv4_ttl = output->ip.ttl;
2069 ipv4_key->ipv4_frag = output->ip.frag;
2070 } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
2071 struct ovs_key_ipv6 *ipv6_key;
2072
2073 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key));
2074 if (!nla)
2075 goto nla_put_failure;
2076 ipv6_key = nla_data(nla);
2077 memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src,
2078 sizeof(ipv6_key->ipv6_src));
2079 memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst,
2080 sizeof(ipv6_key->ipv6_dst));
2081 ipv6_key->ipv6_label = output->ipv6.label;
2082 ipv6_key->ipv6_proto = output->ip.proto;
2083 ipv6_key->ipv6_tclass = output->ip.tos;
2084 ipv6_key->ipv6_hlimit = output->ip.ttl;
2085 ipv6_key->ipv6_frag = output->ip.frag;
2086 } else if (swkey->eth.type == htons(ETH_P_NSH)) {
2087 if (nsh_key_to_nlattr(&output->nsh, is_mask, skb))
2088 goto nla_put_failure;
2089 } else if (swkey->eth.type == htons(ETH_P_ARP) ||
2090 swkey->eth.type == htons(ETH_P_RARP)) {
2091 struct ovs_key_arp *arp_key;
2092
2093 nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key));
2094 if (!nla)
2095 goto nla_put_failure;
2096 arp_key = nla_data(nla);
2097 memset(arp_key, 0, sizeof(struct ovs_key_arp));
2098 arp_key->arp_sip = output->ipv4.addr.src;
2099 arp_key->arp_tip = output->ipv4.addr.dst;
2100 arp_key->arp_op = htons(output->ip.proto);
2101 ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha);
2102 ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha);
2103 } else if (eth_p_mpls(swkey->eth.type)) {
2104 struct ovs_key_mpls *mpls_key;
2105
2106 nla = nla_reserve(skb, OVS_KEY_ATTR_MPLS, sizeof(*mpls_key));
2107 if (!nla)
2108 goto nla_put_failure;
2109 mpls_key = nla_data(nla);
2110 mpls_key->mpls_lse = output->mpls.top_lse;
2111 }
2112
2113 if ((swkey->eth.type == htons(ETH_P_IP) ||
2114 swkey->eth.type == htons(ETH_P_IPV6)) &&
2115 swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
2116
2117 if (swkey->ip.proto == IPPROTO_TCP) {
2118 struct ovs_key_tcp *tcp_key;
2119
2120 nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key));
2121 if (!nla)
2122 goto nla_put_failure;
2123 tcp_key = nla_data(nla);
2124 tcp_key->tcp_src = output->tp.src;
2125 tcp_key->tcp_dst = output->tp.dst;
2126 if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS,
2127 output->tp.flags))
2128 goto nla_put_failure;
2129 } else if (swkey->ip.proto == IPPROTO_UDP) {
2130 struct ovs_key_udp *udp_key;
2131
2132 nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key));
2133 if (!nla)
2134 goto nla_put_failure;
2135 udp_key = nla_data(nla);
2136 udp_key->udp_src = output->tp.src;
2137 udp_key->udp_dst = output->tp.dst;
2138 } else if (swkey->ip.proto == IPPROTO_SCTP) {
2139 struct ovs_key_sctp *sctp_key;
2140
2141 nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key));
2142 if (!nla)
2143 goto nla_put_failure;
2144 sctp_key = nla_data(nla);
2145 sctp_key->sctp_src = output->tp.src;
2146 sctp_key->sctp_dst = output->tp.dst;
2147 } else if (swkey->eth.type == htons(ETH_P_IP) &&
2148 swkey->ip.proto == IPPROTO_ICMP) {
2149 struct ovs_key_icmp *icmp_key;
2150
2151 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key));
2152 if (!nla)
2153 goto nla_put_failure;
2154 icmp_key = nla_data(nla);
2155 icmp_key->icmp_type = ntohs(output->tp.src);
2156 icmp_key->icmp_code = ntohs(output->tp.dst);
2157 } else if (swkey->eth.type == htons(ETH_P_IPV6) &&
2158 swkey->ip.proto == IPPROTO_ICMPV6) {
2159 struct ovs_key_icmpv6 *icmpv6_key;
2160
2161 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6,
2162 sizeof(*icmpv6_key));
2163 if (!nla)
2164 goto nla_put_failure;
2165 icmpv6_key = nla_data(nla);
2166 icmpv6_key->icmpv6_type = ntohs(output->tp.src);
2167 icmpv6_key->icmpv6_code = ntohs(output->tp.dst);
2168
2169 if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION ||
2170 icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) {
2171 struct ovs_key_nd *nd_key;
2172
2173 nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key));
2174 if (!nla)
2175 goto nla_put_failure;
2176 nd_key = nla_data(nla);
2177 memcpy(nd_key->nd_target, &output->ipv6.nd.target,
2178 sizeof(nd_key->nd_target));
2179 ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll);
2180 ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll);
2181 }
2182 }
2183 }
2184
2185 unencap:
2186 if (in_encap)
2187 nla_nest_end(skb, in_encap);
2188 if (encap)
2189 nla_nest_end(skb, encap);
2190
2191 return 0;
2192
2193 nla_put_failure:
2194 return -EMSGSIZE;
2195 }
2196
2197 int ovs_nla_put_key(const struct sw_flow_key *swkey,
2198 const struct sw_flow_key *output, int attr, bool is_mask,
2199 struct sk_buff *skb)
2200 {
2201 int err;
2202 struct nlattr *nla;
2203
2204 nla = nla_nest_start(skb, attr);
2205 if (!nla)
2206 return -EMSGSIZE;
2207 err = __ovs_nla_put_key(swkey, output, is_mask, skb);
2208 if (err)
2209 return err;
2210 nla_nest_end(skb, nla);
2211
2212 return 0;
2213 }
2214
2215 /* Called with ovs_mutex or RCU read lock. */
2216 int ovs_nla_put_identifier(const struct sw_flow *flow, struct sk_buff *skb)
2217 {
2218 if (ovs_identifier_is_ufid(&flow->id))
2219 return nla_put(skb, OVS_FLOW_ATTR_UFID, flow->id.ufid_len,
2220 flow->id.ufid);
2221
2222 return ovs_nla_put_key(flow->id.unmasked_key, flow->id.unmasked_key,
2223 OVS_FLOW_ATTR_KEY, false, skb);
2224 }
2225
2226 /* Called with ovs_mutex or RCU read lock. */
2227 int ovs_nla_put_masked_key(const struct sw_flow *flow, struct sk_buff *skb)
2228 {
2229 return ovs_nla_put_key(&flow->key, &flow->key,
2230 OVS_FLOW_ATTR_KEY, false, skb);
2231 }
2232
2233 /* Called with ovs_mutex or RCU read lock. */
2234 int ovs_nla_put_mask(const struct sw_flow *flow, struct sk_buff *skb)
2235 {
2236 return ovs_nla_put_key(&flow->key, &flow->mask->key,
2237 OVS_FLOW_ATTR_MASK, true, skb);
2238 }
2239
2240 #define MAX_ACTIONS_BUFSIZE (32 * 1024)
2241
2242 static struct sw_flow_actions *nla_alloc_flow_actions(int size)
2243 {
2244 struct sw_flow_actions *sfa;
2245
2246 WARN_ON_ONCE(size > MAX_ACTIONS_BUFSIZE);
2247
2248 sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL);
2249 if (!sfa)
2250 return ERR_PTR(-ENOMEM);
2251
2252 sfa->actions_len = 0;
2253 return sfa;
2254 }
2255
2256 static void ovs_nla_free_set_action(const struct nlattr *a)
2257 {
2258 const struct nlattr *ovs_key = nla_data(a);
2259 struct ovs_tunnel_info *ovs_tun;
2260
2261 switch (nla_type(ovs_key)) {
2262 case OVS_KEY_ATTR_TUNNEL_INFO:
2263 ovs_tun = nla_data(ovs_key);
2264 dst_release((struct dst_entry *)ovs_tun->tun_dst);
2265 break;
2266 }
2267 }
2268
2269 void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts)
2270 {
2271 const struct nlattr *a;
2272 int rem;
2273
2274 if (!sf_acts)
2275 return;
2276
2277 nla_for_each_attr(a, sf_acts->actions, sf_acts->actions_len, rem) {
2278 switch (nla_type(a)) {
2279 case OVS_ACTION_ATTR_SET:
2280 ovs_nla_free_set_action(a);
2281 break;
2282 case OVS_ACTION_ATTR_CT:
2283 ovs_ct_free_action(a);
2284 break;
2285 }
2286 }
2287
2288 kfree(sf_acts);
2289 }
2290
2291 static void __ovs_nla_free_flow_actions(struct rcu_head *head)
2292 {
2293 ovs_nla_free_flow_actions(container_of(head, struct sw_flow_actions, rcu));
2294 }
2295
2296 /* Schedules 'sf_acts' to be freed after the next RCU grace period.
2297 * The caller must hold rcu_read_lock for this to be sensible. */
2298 void ovs_nla_free_flow_actions_rcu(struct sw_flow_actions *sf_acts)
2299 {
2300 call_rcu(&sf_acts->rcu, __ovs_nla_free_flow_actions);
2301 }
2302
2303 static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa,
2304 int attr_len, bool log)
2305 {
2306
2307 struct sw_flow_actions *acts;
2308 int new_acts_size;
2309 int req_size = NLA_ALIGN(attr_len);
2310 int next_offset = offsetof(struct sw_flow_actions, actions) +
2311 (*sfa)->actions_len;
2312
2313 if (req_size <= (ksize(*sfa) - next_offset))
2314 goto out;
2315
2316 new_acts_size = ksize(*sfa) * 2;
2317
2318 if (new_acts_size > MAX_ACTIONS_BUFSIZE) {
2319 if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size) {
2320 OVS_NLERR(log, "Flow action size exceeds max %u",
2321 MAX_ACTIONS_BUFSIZE);
2322 return ERR_PTR(-EMSGSIZE);
2323 }
2324 new_acts_size = MAX_ACTIONS_BUFSIZE;
2325 }
2326
2327 acts = nla_alloc_flow_actions(new_acts_size);
2328 if (IS_ERR(acts))
2329 return (void *)acts;
2330
2331 memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len);
2332 acts->actions_len = (*sfa)->actions_len;
2333 acts->orig_len = (*sfa)->orig_len;
2334 kfree(*sfa);
2335 *sfa = acts;
2336
2337 out:
2338 (*sfa)->actions_len += req_size;
2339 return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset);
2340 }
2341
2342 static struct nlattr *__add_action(struct sw_flow_actions **sfa,
2343 int attrtype, void *data, int len, bool log)
2344 {
2345 struct nlattr *a;
2346
2347 a = reserve_sfa_size(sfa, nla_attr_size(len), log);
2348 if (IS_ERR(a))
2349 return a;
2350
2351 a->nla_type = attrtype;
2352 a->nla_len = nla_attr_size(len);
2353
2354 if (data)
2355 memcpy(nla_data(a), data, len);
2356 memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len));
2357
2358 return a;
2359 }
2360
2361 int ovs_nla_add_action(struct sw_flow_actions **sfa, int attrtype, void *data,
2362 int len, bool log)
2363 {
2364 struct nlattr *a;
2365
2366 a = __add_action(sfa, attrtype, data, len, log);
2367
2368 return PTR_ERR_OR_ZERO(a);
2369 }
2370
2371 static inline int add_nested_action_start(struct sw_flow_actions **sfa,
2372 int attrtype, bool log)
2373 {
2374 int used = (*sfa)->actions_len;
2375 int err;
2376
2377 err = ovs_nla_add_action(sfa, attrtype, NULL, 0, log);
2378 if (err)
2379 return err;
2380
2381 return used;
2382 }
2383
2384 static inline void add_nested_action_end(struct sw_flow_actions *sfa,
2385 int st_offset)
2386 {
2387 struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions +
2388 st_offset);
2389
2390 a->nla_len = sfa->actions_len - st_offset;
2391 }
2392
2393 static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
2394 const struct sw_flow_key *key,
2395 struct sw_flow_actions **sfa,
2396 __be16 eth_type, __be16 vlan_tci, bool log);
2397
2398 static int validate_and_copy_sample(struct net *net, const struct nlattr *attr,
2399 const struct sw_flow_key *key,
2400 struct sw_flow_actions **sfa,
2401 __be16 eth_type, __be16 vlan_tci,
2402 bool log, bool last)
2403 {
2404 const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];
2405 const struct nlattr *probability, *actions;
2406 const struct nlattr *a;
2407 int rem, start, err;
2408 struct sample_arg arg;
2409
2410 memset(attrs, 0, sizeof(attrs));
2411 nla_for_each_nested(a, attr, rem) {
2412 int type = nla_type(a);
2413 if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type])
2414 return -EINVAL;
2415 attrs[type] = a;
2416 }
2417 if (rem)
2418 return -EINVAL;
2419
2420 probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY];
2421 if (!probability || nla_len(probability) != sizeof(u32))
2422 return -EINVAL;
2423
2424 actions = attrs[OVS_SAMPLE_ATTR_ACTIONS];
2425 if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN))
2426 return -EINVAL;
2427
2428 /* validation done, copy sample action. */
2429 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE, log);
2430 if (start < 0)
2431 return start;
2432
2433 /* When both skb and flow may be changed, put the sample
2434 * into a deferred fifo. On the other hand, if only skb
2435 * may be modified, the actions can be executed in place.
2436 *
2437 * Do this analysis at the flow installation time.
2438 * Set 'clone_action->exec' to true if the actions can be
2439 * executed without being deferred.
2440 *
2441 * If the sample is the last action, it can always be excuted
2442 * rather than deferred.
2443 */
2444 arg.exec = last || !actions_may_change_flow(actions);
2445 arg.probability = nla_get_u32(probability);
2446
2447 err = ovs_nla_add_action(sfa, OVS_SAMPLE_ATTR_ARG, &arg, sizeof(arg),
2448 log);
2449 if (err)
2450 return err;
2451
2452 err = __ovs_nla_copy_actions(net, actions, key, sfa,
2453 eth_type, vlan_tci, log);
2454
2455 if (err)
2456 return err;
2457
2458 add_nested_action_end(*sfa, start);
2459
2460 return 0;
2461 }
2462
2463 static int validate_and_copy_clone(struct net *net,
2464 const struct nlattr *attr,
2465 const struct sw_flow_key *key,
2466 struct sw_flow_actions **sfa,
2467 __be16 eth_type, __be16 vlan_tci,
2468 bool log, bool last)
2469 {
2470 int start, err;
2471 u32 exec;
2472
2473 if (nla_len(attr) && nla_len(attr) < NLA_HDRLEN)
2474 return -EINVAL;
2475
2476 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_CLONE, log);
2477 if (start < 0)
2478 return start;
2479
2480 exec = last || !actions_may_change_flow(attr);
2481
2482 err = ovs_nla_add_action(sfa, OVS_CLONE_ATTR_EXEC, &exec,
2483 sizeof(exec), log);
2484 if (err)
2485 return err;
2486
2487 err = __ovs_nla_copy_actions(net, attr, key, sfa,
2488 eth_type, vlan_tci, log);
2489 if (err)
2490 return err;
2491
2492 add_nested_action_end(*sfa, start);
2493
2494 return 0;
2495 }
2496
2497 void ovs_match_init(struct sw_flow_match *match,
2498 struct sw_flow_key *key,
2499 bool reset_key,
2500 struct sw_flow_mask *mask)
2501 {
2502 memset(match, 0, sizeof(*match));
2503 match->key = key;
2504 match->mask = mask;
2505
2506 if (reset_key)
2507 memset(key, 0, sizeof(*key));
2508
2509 if (mask) {
2510 memset(&mask->key, 0, sizeof(mask->key));
2511 mask->range.start = mask->range.end = 0;
2512 }
2513 }
2514
2515 static int validate_geneve_opts(struct sw_flow_key *key)
2516 {
2517 struct geneve_opt *option;
2518 int opts_len = key->tun_opts_len;
2519 bool crit_opt = false;
2520
2521 option = (struct geneve_opt *)TUN_METADATA_OPTS(key, key->tun_opts_len);
2522 while (opts_len > 0) {
2523 int len;
2524
2525 if (opts_len < sizeof(*option))
2526 return -EINVAL;
2527
2528 len = sizeof(*option) + option->length * 4;
2529 if (len > opts_len)
2530 return -EINVAL;
2531
2532 crit_opt |= !!(option->type & GENEVE_CRIT_OPT_TYPE);
2533
2534 option = (struct geneve_opt *)((u8 *)option + len);
2535 opts_len -= len;
2536 }
2537
2538 key->tun_key.tun_flags |= crit_opt ? TUNNEL_CRIT_OPT : 0;
2539
2540 return 0;
2541 }
2542
2543 static int validate_and_copy_set_tun(const struct nlattr *attr,
2544 struct sw_flow_actions **sfa, bool log)
2545 {
2546 struct sw_flow_match match;
2547 struct sw_flow_key key;
2548 struct metadata_dst *tun_dst;
2549 struct ip_tunnel_info *tun_info;
2550 struct ovs_tunnel_info *ovs_tun;
2551 struct nlattr *a;
2552 int err = 0, start, opts_type;
2553 __be16 dst_opt_type;
2554
2555 dst_opt_type = 0;
2556 ovs_match_init(&match, &key, true, NULL);
2557 opts_type = ip_tun_from_nlattr(nla_data(attr), &match, false, log);
2558 if (opts_type < 0)
2559 return opts_type;
2560
2561 if (key.tun_opts_len) {
2562 switch (opts_type) {
2563 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
2564 err = validate_geneve_opts(&key);
2565 if (err < 0)
2566 return err;
2567 dst_opt_type = TUNNEL_GENEVE_OPT;
2568 break;
2569 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
2570 dst_opt_type = TUNNEL_VXLAN_OPT;
2571 break;
2572 case OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS:
2573 dst_opt_type = TUNNEL_ERSPAN_OPT;
2574 break;
2575 }
2576 }
2577
2578 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET, log);
2579 if (start < 0)
2580 return start;
2581
2582 tun_dst = metadata_dst_alloc(key.tun_opts_len, METADATA_IP_TUNNEL,
2583 GFP_KERNEL);
2584
2585 if (!tun_dst)
2586 return -ENOMEM;
2587
2588 err = dst_cache_init(&tun_dst->u.tun_info.dst_cache, GFP_KERNEL);
2589 if (err) {
2590 dst_release((struct dst_entry *)tun_dst);
2591 return err;
2592 }
2593
2594 a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL,
2595 sizeof(*ovs_tun), log);
2596 if (IS_ERR(a)) {
2597 dst_release((struct dst_entry *)tun_dst);
2598 return PTR_ERR(a);
2599 }
2600
2601 ovs_tun = nla_data(a);
2602 ovs_tun->tun_dst = tun_dst;
2603
2604 tun_info = &tun_dst->u.tun_info;
2605 tun_info->mode = IP_TUNNEL_INFO_TX;
2606 if (key.tun_proto == AF_INET6)
2607 tun_info->mode |= IP_TUNNEL_INFO_IPV6;
2608 tun_info->key = key.tun_key;
2609
2610 /* We need to store the options in the action itself since
2611 * everything else will go away after flow setup. We can append
2612 * it to tun_info and then point there.
2613 */
2614 ip_tunnel_info_opts_set(tun_info,
2615 TUN_METADATA_OPTS(&key, key.tun_opts_len),
2616 key.tun_opts_len, dst_opt_type);
2617 add_nested_action_end(*sfa, start);
2618
2619 return err;
2620 }
2621
2622 static bool validate_nsh(const struct nlattr *attr, bool is_mask,
2623 bool is_push_nsh, bool log)
2624 {
2625 struct sw_flow_match match;
2626 struct sw_flow_key key;
2627 int ret = 0;
2628
2629 ovs_match_init(&match, &key, true, NULL);
2630 ret = nsh_key_put_from_nlattr(attr, &match, is_mask,
2631 is_push_nsh, log);
2632 return !ret;
2633 }
2634
2635 /* Return false if there are any non-masked bits set.
2636 * Mask follows data immediately, before any netlink padding.
2637 */
2638 static bool validate_masked(u8 *data, int len)
2639 {
2640 u8 *mask = data + len;
2641
2642 while (len--)
2643 if (*data++ & ~*mask++)
2644 return false;
2645
2646 return true;
2647 }
2648
2649 static int validate_set(const struct nlattr *a,
2650 const struct sw_flow_key *flow_key,
2651 struct sw_flow_actions **sfa, bool *skip_copy,
2652 u8 mac_proto, __be16 eth_type, bool masked, bool log)
2653 {
2654 const struct nlattr *ovs_key = nla_data(a);
2655 int key_type = nla_type(ovs_key);
2656 size_t key_len;
2657
2658 /* There can be only one key in a action */
2659 if (nla_total_size(nla_len(ovs_key)) != nla_len(a))
2660 return -EINVAL;
2661
2662 key_len = nla_len(ovs_key);
2663 if (masked)
2664 key_len /= 2;
2665
2666 if (key_type > OVS_KEY_ATTR_MAX ||
2667 !check_attr_len(key_len, ovs_key_lens[key_type].len))
2668 return -EINVAL;
2669
2670 if (masked && !validate_masked(nla_data(ovs_key), key_len))
2671 return -EINVAL;
2672
2673 switch (key_type) {
2674 const struct ovs_key_ipv4 *ipv4_key;
2675 const struct ovs_key_ipv6 *ipv6_key;
2676 int err;
2677
2678 case OVS_KEY_ATTR_PRIORITY:
2679 case OVS_KEY_ATTR_SKB_MARK:
2680 case OVS_KEY_ATTR_CT_MARK:
2681 case OVS_KEY_ATTR_CT_LABELS:
2682 break;
2683
2684 case OVS_KEY_ATTR_ETHERNET:
2685 if (mac_proto != MAC_PROTO_ETHERNET)
2686 return -EINVAL;
2687 break;
2688
2689 case OVS_KEY_ATTR_TUNNEL:
2690 if (masked)
2691 return -EINVAL; /* Masked tunnel set not supported. */
2692
2693 *skip_copy = true;
2694 err = validate_and_copy_set_tun(a, sfa, log);
2695 if (err)
2696 return err;
2697 break;
2698
2699 case OVS_KEY_ATTR_IPV4:
2700 if (eth_type != htons(ETH_P_IP))
2701 return -EINVAL;
2702
2703 ipv4_key = nla_data(ovs_key);
2704
2705 if (masked) {
2706 const struct ovs_key_ipv4 *mask = ipv4_key + 1;
2707
2708 /* Non-writeable fields. */
2709 if (mask->ipv4_proto || mask->ipv4_frag)
2710 return -EINVAL;
2711 } else {
2712 if (ipv4_key->ipv4_proto != flow_key->ip.proto)
2713 return -EINVAL;
2714
2715 if (ipv4_key->ipv4_frag != flow_key->ip.frag)
2716 return -EINVAL;
2717 }
2718 break;
2719
2720 case OVS_KEY_ATTR_IPV6:
2721 if (eth_type != htons(ETH_P_IPV6))
2722 return -EINVAL;
2723
2724 ipv6_key = nla_data(ovs_key);
2725
2726 if (masked) {
2727 const struct ovs_key_ipv6 *mask = ipv6_key + 1;
2728
2729 /* Non-writeable fields. */
2730 if (mask->ipv6_proto || mask->ipv6_frag)
2731 return -EINVAL;
2732
2733 /* Invalid bits in the flow label mask? */
2734 if (ntohl(mask->ipv6_label) & 0xFFF00000)
2735 return -EINVAL;
2736 } else {
2737 if (ipv6_key->ipv6_proto != flow_key->ip.proto)
2738 return -EINVAL;
2739
2740 if (ipv6_key->ipv6_frag != flow_key->ip.frag)
2741 return -EINVAL;
2742 }
2743 if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000)
2744 return -EINVAL;
2745
2746 break;
2747
2748 case OVS_KEY_ATTR_TCP:
2749 if ((eth_type != htons(ETH_P_IP) &&
2750 eth_type != htons(ETH_P_IPV6)) ||
2751 flow_key->ip.proto != IPPROTO_TCP)
2752 return -EINVAL;
2753
2754 break;
2755
2756 case OVS_KEY_ATTR_UDP:
2757 if ((eth_type != htons(ETH_P_IP) &&
2758 eth_type != htons(ETH_P_IPV6)) ||
2759 flow_key->ip.proto != IPPROTO_UDP)
2760 return -EINVAL;
2761
2762 break;
2763
2764 case OVS_KEY_ATTR_MPLS:
2765 if (!eth_p_mpls(eth_type))
2766 return -EINVAL;
2767 break;
2768
2769 case OVS_KEY_ATTR_SCTP:
2770 if ((eth_type != htons(ETH_P_IP) &&
2771 eth_type != htons(ETH_P_IPV6)) ||
2772 flow_key->ip.proto != IPPROTO_SCTP)
2773 return -EINVAL;
2774
2775 break;
2776
2777 case OVS_KEY_ATTR_NSH:
2778 if (eth_type != htons(ETH_P_NSH))
2779 return -EINVAL;
2780 if (!validate_nsh(nla_data(a), masked, false, log))
2781 return -EINVAL;
2782 break;
2783
2784 default:
2785 return -EINVAL;
2786 }
2787
2788 /* Convert non-masked non-tunnel set actions to masked set actions. */
2789 if (!masked && key_type != OVS_KEY_ATTR_TUNNEL) {
2790 int start, len = key_len * 2;
2791 struct nlattr *at;
2792
2793 *skip_copy = true;
2794
2795 start = add_nested_action_start(sfa,
2796 OVS_ACTION_ATTR_SET_TO_MASKED,
2797 log);
2798 if (start < 0)
2799 return start;
2800
2801 at = __add_action(sfa, key_type, NULL, len, log);
2802 if (IS_ERR(at))
2803 return PTR_ERR(at);
2804
2805 memcpy(nla_data(at), nla_data(ovs_key), key_len); /* Key. */
2806 memset(nla_data(at) + key_len, 0xff, key_len); /* Mask. */
2807 /* Clear non-writeable bits from otherwise writeable fields. */
2808 if (key_type == OVS_KEY_ATTR_IPV6) {
2809 struct ovs_key_ipv6 *mask = nla_data(at) + key_len;
2810
2811 mask->ipv6_label &= htonl(0x000FFFFF);
2812 }
2813 add_nested_action_end(*sfa, start);
2814 }
2815
2816 return 0;
2817 }
2818
2819 static int validate_userspace(const struct nlattr *attr)
2820 {
2821 static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = {
2822 [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 },
2823 [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC },
2824 [OVS_USERSPACE_ATTR_EGRESS_TUN_PORT] = {.type = NLA_U32 },
2825 };
2826 struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];
2827 int error;
2828
2829 error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX, attr,
2830 userspace_policy, NULL);
2831 if (error)
2832 return error;
2833
2834 if (!a[OVS_USERSPACE_ATTR_PID] ||
2835 !nla_get_u32(a[OVS_USERSPACE_ATTR_PID]))
2836 return -EINVAL;
2837
2838 return 0;
2839 }
2840
2841 static int copy_action(const struct nlattr *from,
2842 struct sw_flow_actions **sfa, bool log)
2843 {
2844 int totlen = NLA_ALIGN(from->nla_len);
2845 struct nlattr *to;
2846
2847 to = reserve_sfa_size(sfa, from->nla_len, log);
2848 if (IS_ERR(to))
2849 return PTR_ERR(to);
2850
2851 memcpy(to, from, totlen);
2852 return 0;
2853 }
2854
2855 static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
2856 const struct sw_flow_key *key,
2857 struct sw_flow_actions **sfa,
2858 __be16 eth_type, __be16 vlan_tci, bool log)
2859 {
2860 u8 mac_proto = ovs_key_mac_proto(key);
2861 const struct nlattr *a;
2862 int rem, err;
2863
2864 nla_for_each_nested(a, attr, rem) {
2865 /* Expected argument lengths, (u32)-1 for variable length. */
2866 static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {
2867 [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32),
2868 [OVS_ACTION_ATTR_RECIRC] = sizeof(u32),
2869 [OVS_ACTION_ATTR_USERSPACE] = (u32)-1,
2870 [OVS_ACTION_ATTR_PUSH_MPLS] = sizeof(struct ovs_action_push_mpls),
2871 [OVS_ACTION_ATTR_POP_MPLS] = sizeof(__be16),
2872 [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan),
2873 [OVS_ACTION_ATTR_POP_VLAN] = 0,
2874 [OVS_ACTION_ATTR_SET] = (u32)-1,
2875 [OVS_ACTION_ATTR_SET_MASKED] = (u32)-1,
2876 [OVS_ACTION_ATTR_SAMPLE] = (u32)-1,
2877 [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash),
2878 [OVS_ACTION_ATTR_CT] = (u32)-1,
2879 [OVS_ACTION_ATTR_CT_CLEAR] = 0,
2880 [OVS_ACTION_ATTR_TRUNC] = sizeof(struct ovs_action_trunc),
2881 [OVS_ACTION_ATTR_PUSH_ETH] = sizeof(struct ovs_action_push_eth),
2882 [OVS_ACTION_ATTR_POP_ETH] = 0,
2883 [OVS_ACTION_ATTR_PUSH_NSH] = (u32)-1,
2884 [OVS_ACTION_ATTR_POP_NSH] = 0,
2885 [OVS_ACTION_ATTR_METER] = sizeof(u32),
2886 [OVS_ACTION_ATTR_CLONE] = (u32)-1,
2887 };
2888 const struct ovs_action_push_vlan *vlan;
2889 int type = nla_type(a);
2890 bool skip_copy;
2891
2892 if (type > OVS_ACTION_ATTR_MAX ||
2893 (action_lens[type] != nla_len(a) &&
2894 action_lens[type] != (u32)-1))
2895 return -EINVAL;
2896
2897 skip_copy = false;
2898 switch (type) {
2899 case OVS_ACTION_ATTR_UNSPEC:
2900 return -EINVAL;
2901
2902 case OVS_ACTION_ATTR_USERSPACE:
2903 err = validate_userspace(a);
2904 if (err)
2905 return err;
2906 break;
2907
2908 case OVS_ACTION_ATTR_OUTPUT:
2909 if (nla_get_u32(a) >= DP_MAX_PORTS)
2910 return -EINVAL;
2911 break;
2912
2913 case OVS_ACTION_ATTR_TRUNC: {
2914 const struct ovs_action_trunc *trunc = nla_data(a);
2915
2916 if (trunc->max_len < ETH_HLEN)
2917 return -EINVAL;
2918 break;
2919 }
2920
2921 case OVS_ACTION_ATTR_HASH: {
2922 const struct ovs_action_hash *act_hash = nla_data(a);
2923
2924 switch (act_hash->hash_alg) {
2925 case OVS_HASH_ALG_L4:
2926 break;
2927 default:
2928 return -EINVAL;
2929 }
2930
2931 break;
2932 }
2933
2934 case OVS_ACTION_ATTR_POP_VLAN:
2935 if (mac_proto != MAC_PROTO_ETHERNET)
2936 return -EINVAL;
2937 vlan_tci = htons(0);
2938 break;
2939
2940 case OVS_ACTION_ATTR_PUSH_VLAN:
2941 if (mac_proto != MAC_PROTO_ETHERNET)
2942 return -EINVAL;
2943 vlan = nla_data(a);
2944 if (!eth_type_vlan(vlan->vlan_tpid))
2945 return -EINVAL;
2946 if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT)))
2947 return -EINVAL;
2948 vlan_tci = vlan->vlan_tci;
2949 break;
2950
2951 case OVS_ACTION_ATTR_RECIRC:
2952 break;
2953
2954 case OVS_ACTION_ATTR_PUSH_MPLS: {
2955 const struct ovs_action_push_mpls *mpls = nla_data(a);
2956
2957 if (!eth_p_mpls(mpls->mpls_ethertype))
2958 return -EINVAL;
2959 /* Prohibit push MPLS other than to a white list
2960 * for packets that have a known tag order.
2961 */
2962 if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
2963 (eth_type != htons(ETH_P_IP) &&
2964 eth_type != htons(ETH_P_IPV6) &&
2965 eth_type != htons(ETH_P_ARP) &&
2966 eth_type != htons(ETH_P_RARP) &&
2967 !eth_p_mpls(eth_type)))
2968 return -EINVAL;
2969 eth_type = mpls->mpls_ethertype;
2970 break;
2971 }
2972
2973 case OVS_ACTION_ATTR_POP_MPLS:
2974 if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
2975 !eth_p_mpls(eth_type))
2976 return -EINVAL;
2977
2978 /* Disallow subsequent L2.5+ set and mpls_pop actions
2979 * as there is no check here to ensure that the new
2980 * eth_type is valid and thus set actions could
2981 * write off the end of the packet or otherwise
2982 * corrupt it.
2983 *
2984 * Support for these actions is planned using packet
2985 * recirculation.
2986 */
2987 eth_type = htons(0);
2988 break;
2989
2990 case OVS_ACTION_ATTR_SET:
2991 err = validate_set(a, key, sfa,
2992 &skip_copy, mac_proto, eth_type,
2993 false, log);
2994 if (err)
2995 return err;
2996 break;
2997
2998 case OVS_ACTION_ATTR_SET_MASKED:
2999 err = validate_set(a, key, sfa,
3000 &skip_copy, mac_proto, eth_type,
3001 true, log);
3002 if (err)
3003 return err;
3004 break;
3005
3006 case OVS_ACTION_ATTR_SAMPLE: {
3007 bool last = nla_is_last(a, rem);
3008
3009 err = validate_and_copy_sample(net, a, key, sfa,
3010 eth_type, vlan_tci,
3011 log, last);
3012 if (err)
3013 return err;
3014 skip_copy = true;
3015 break;
3016 }
3017
3018 case OVS_ACTION_ATTR_CT:
3019 err = ovs_ct_copy_action(net, a, key, sfa, log);
3020 if (err)
3021 return err;
3022 skip_copy = true;
3023 break;
3024
3025 case OVS_ACTION_ATTR_CT_CLEAR:
3026 break;
3027
3028 case OVS_ACTION_ATTR_PUSH_ETH:
3029 /* Disallow pushing an Ethernet header if one
3030 * is already present */
3031 if (mac_proto != MAC_PROTO_NONE)
3032 return -EINVAL;
3033 mac_proto = MAC_PROTO_NONE;
3034 break;
3035
3036 case OVS_ACTION_ATTR_POP_ETH:
3037 if (mac_proto != MAC_PROTO_ETHERNET)
3038 return -EINVAL;
3039 if (vlan_tci & htons(VLAN_TAG_PRESENT))
3040 return -EINVAL;
3041 mac_proto = MAC_PROTO_ETHERNET;
3042 break;
3043
3044 case OVS_ACTION_ATTR_PUSH_NSH:
3045 if (mac_proto != MAC_PROTO_ETHERNET) {
3046 u8 next_proto;
3047
3048 next_proto = tun_p_from_eth_p(eth_type);
3049 if (!next_proto)
3050 return -EINVAL;
3051 }
3052 mac_proto = MAC_PROTO_NONE;
3053 if (!validate_nsh(nla_data(a), false, true, true))
3054 return -EINVAL;
3055 break;
3056
3057 case OVS_ACTION_ATTR_POP_NSH: {
3058 __be16 inner_proto;
3059
3060 if (eth_type != htons(ETH_P_NSH))
3061 return -EINVAL;
3062 inner_proto = tun_p_to_eth_p(key->nsh.base.np);
3063 if (!inner_proto)
3064 return -EINVAL;
3065 if (key->nsh.base.np == TUN_P_ETHERNET)
3066 mac_proto = MAC_PROTO_ETHERNET;
3067 else
3068 mac_proto = MAC_PROTO_NONE;
3069 break;
3070 }
3071
3072 case OVS_ACTION_ATTR_METER:
3073 /* Non-existent meters are simply ignored. */
3074 break;
3075
3076 case OVS_ACTION_ATTR_CLONE: {
3077 bool last = nla_is_last(a, rem);
3078
3079 err = validate_and_copy_clone(net, a, key, sfa,
3080 eth_type, vlan_tci,
3081 log, last);
3082 if (err)
3083 return err;
3084 skip_copy = true;
3085 break;
3086 }
3087
3088 default:
3089 OVS_NLERR(log, "Unknown Action type %d", type);
3090 return -EINVAL;
3091 }
3092 if (!skip_copy) {
3093 err = copy_action(a, sfa, log);
3094 if (err)
3095 return err;
3096 }
3097 }
3098
3099 if (rem > 0)
3100 return -EINVAL;
3101
3102 return 0;
3103 }
3104
3105 /* 'key' must be the masked key. */
3106 int ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
3107 const struct sw_flow_key *key,
3108 struct sw_flow_actions **sfa, bool log)
3109 {
3110 int err;
3111
3112 *sfa = nla_alloc_flow_actions(min(nla_len(attr), MAX_ACTIONS_BUFSIZE));
3113 if (IS_ERR(*sfa))
3114 return PTR_ERR(*sfa);
3115
3116 (*sfa)->orig_len = nla_len(attr);
3117 err = __ovs_nla_copy_actions(net, attr, key, sfa, key->eth.type,
3118 key->eth.vlan.tci, log);
3119 if (err)
3120 ovs_nla_free_flow_actions(*sfa);
3121
3122 return err;
3123 }
3124
3125 static int sample_action_to_attr(const struct nlattr *attr,
3126 struct sk_buff *skb)
3127 {
3128 struct nlattr *start, *ac_start = NULL, *sample_arg;
3129 int err = 0, rem = nla_len(attr);
3130 const struct sample_arg *arg;
3131 struct nlattr *actions;
3132
3133 start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE);
3134 if (!start)
3135 return -EMSGSIZE;
3136
3137 sample_arg = nla_data(attr);
3138 arg = nla_data(sample_arg);
3139 actions = nla_next(sample_arg, &rem);
3140
3141 if (nla_put_u32(skb, OVS_SAMPLE_ATTR_PROBABILITY, arg->probability)) {
3142 err = -EMSGSIZE;
3143 goto out;
3144 }
3145
3146 ac_start = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS);
3147 if (!ac_start) {
3148 err = -EMSGSIZE;
3149 goto out;
3150 }
3151
3152 err = ovs_nla_put_actions(actions, rem, skb);
3153
3154 out:
3155 if (err) {
3156 nla_nest_cancel(skb, ac_start);
3157 nla_nest_cancel(skb, start);
3158 } else {
3159 nla_nest_end(skb, ac_start);
3160 nla_nest_end(skb, start);
3161 }
3162
3163 return err;
3164 }
3165
3166 static int clone_action_to_attr(const struct nlattr *attr,
3167 struct sk_buff *skb)
3168 {
3169 struct nlattr *start;
3170 int err = 0, rem = nla_len(attr);
3171
3172 start = nla_nest_start(skb, OVS_ACTION_ATTR_CLONE);
3173 if (!start)
3174 return -EMSGSIZE;
3175
3176 err = ovs_nla_put_actions(nla_data(attr), rem, skb);
3177
3178 if (err)
3179 nla_nest_cancel(skb, start);
3180 else
3181 nla_nest_end(skb, start);
3182
3183 return err;
3184 }
3185
3186 static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb)
3187 {
3188 const struct nlattr *ovs_key = nla_data(a);
3189 int key_type = nla_type(ovs_key);
3190 struct nlattr *start;
3191 int err;
3192
3193 switch (key_type) {
3194 case OVS_KEY_ATTR_TUNNEL_INFO: {
3195 struct ovs_tunnel_info *ovs_tun = nla_data(ovs_key);
3196 struct ip_tunnel_info *tun_info = &ovs_tun->tun_dst->u.tun_info;
3197
3198 start = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
3199 if (!start)
3200 return -EMSGSIZE;
3201
3202 err = ip_tun_to_nlattr(skb, &tun_info->key,
3203 ip_tunnel_info_opts(tun_info),
3204 tun_info->options_len,
3205 ip_tunnel_info_af(tun_info));
3206 if (err)
3207 return err;
3208 nla_nest_end(skb, start);
3209 break;
3210 }
3211 default:
3212 if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key))
3213 return -EMSGSIZE;
3214 break;
3215 }
3216
3217 return 0;
3218 }
3219
3220 static int masked_set_action_to_set_action_attr(const struct nlattr *a,
3221 struct sk_buff *skb)
3222 {
3223 const struct nlattr *ovs_key = nla_data(a);
3224 struct nlattr *nla;
3225 size_t key_len = nla_len(ovs_key) / 2;
3226
3227 /* Revert the conversion we did from a non-masked set action to
3228 * masked set action.
3229 */
3230 nla = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
3231 if (!nla)
3232 return -EMSGSIZE;
3233
3234 if (nla_put(skb, nla_type(ovs_key), key_len, nla_data(ovs_key)))
3235 return -EMSGSIZE;
3236
3237 nla_nest_end(skb, nla);
3238 return 0;
3239 }
3240
3241 int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb)
3242 {
3243 const struct nlattr *a;
3244 int rem, err;
3245
3246 nla_for_each_attr(a, attr, len, rem) {
3247 int type = nla_type(a);
3248
3249 switch (type) {
3250 case OVS_ACTION_ATTR_SET:
3251 err = set_action_to_attr(a, skb);
3252 if (err)
3253 return err;
3254 break;
3255
3256 case OVS_ACTION_ATTR_SET_TO_MASKED:
3257 err = masked_set_action_to_set_action_attr(a, skb);
3258 if (err)
3259 return err;
3260 break;
3261
3262 case OVS_ACTION_ATTR_SAMPLE:
3263 err = sample_action_to_attr(a, skb);
3264 if (err)
3265 return err;
3266 break;
3267
3268 case OVS_ACTION_ATTR_CT:
3269 err = ovs_ct_action_to_attr(nla_data(a), skb);
3270 if (err)
3271 return err;
3272 break;
3273
3274 case OVS_ACTION_ATTR_CLONE:
3275 err = clone_action_to_attr(a, skb);
3276 if (err)
3277 return err;
3278 break;
3279
3280 default:
3281 if (nla_put(skb, type, nla_len(a), nla_data(a)))
3282 return -EMSGSIZE;
3283 break;
3284 }
3285 }
3286
3287 return 0;
3288 }
Linux with added FPC-III support