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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2007-2017 Nicira, Inc.
4 */
5
6#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
7
8#include "flow.h"
9#include "datapath.h"
10#include <linux/uaccess.h>
11#include <linux/netdevice.h>
12#include <linux/etherdevice.h>
13#include <linux/if_ether.h>
14#include <linux/if_vlan.h>
15#include <net/llc_pdu.h>
16#include <linux/kernel.h>
17#include <linux/jhash.h>
18#include <linux/jiffies.h>
19#include <linux/llc.h>
20#include <linux/module.h>
21#include <linux/in.h>
22#include <linux/rcupdate.h>
23#include <linux/if_arp.h>
24#include <linux/ip.h>
25#include <linux/ipv6.h>
26#include <linux/sctp.h>
27#include <linux/tcp.h>
28#include <linux/udp.h>
29#include <linux/icmp.h>
30#include <linux/icmpv6.h>
31#include <linux/rculist.h>
32#include <net/geneve.h>
33#include <net/ip.h>
34#include <net/ipv6.h>
35#include <net/ndisc.h>
36#include <net/mpls.h>
37#include <net/vxlan.h>
38#include <net/tun_proto.h>
39#include <net/erspan.h>
40
41#include "drop.h"
42#include "flow_netlink.h"
43
44struct ovs_len_tbl {
45 int len;
46 const struct ovs_len_tbl *next;
47};
48
49#define OVS_ATTR_NESTED -1
50#define OVS_ATTR_VARIABLE -2
51#define OVS_COPY_ACTIONS_MAX_DEPTH 16
52
53static bool actions_may_change_flow(const struct nlattr *actions)
54{
55 struct nlattr *nla;
56 int rem;
57
58 nla_for_each_nested(nla, actions, rem) {
59 u16 action = nla_type(nla);
60
61 switch (action) {
62 case OVS_ACTION_ATTR_OUTPUT:
63 case OVS_ACTION_ATTR_RECIRC:
64 case OVS_ACTION_ATTR_TRUNC:
65 case OVS_ACTION_ATTR_USERSPACE:
66 case OVS_ACTION_ATTR_DROP:
67 case OVS_ACTION_ATTR_PSAMPLE:
68 break;
69
70 case OVS_ACTION_ATTR_CT:
71 case OVS_ACTION_ATTR_CT_CLEAR:
72 case OVS_ACTION_ATTR_HASH:
73 case OVS_ACTION_ATTR_POP_ETH:
74 case OVS_ACTION_ATTR_POP_MPLS:
75 case OVS_ACTION_ATTR_POP_NSH:
76 case OVS_ACTION_ATTR_POP_VLAN:
77 case OVS_ACTION_ATTR_PUSH_ETH:
78 case OVS_ACTION_ATTR_PUSH_MPLS:
79 case OVS_ACTION_ATTR_PUSH_NSH:
80 case OVS_ACTION_ATTR_PUSH_VLAN:
81 case OVS_ACTION_ATTR_SAMPLE:
82 case OVS_ACTION_ATTR_SET:
83 case OVS_ACTION_ATTR_SET_MASKED:
84 case OVS_ACTION_ATTR_METER:
85 case OVS_ACTION_ATTR_CHECK_PKT_LEN:
86 case OVS_ACTION_ATTR_ADD_MPLS:
87 case OVS_ACTION_ATTR_DEC_TTL:
88 default:
89 return true;
90 }
91 }
92 return false;
93}
94
95static void update_range(struct sw_flow_match *match,
96 size_t offset, size_t size, bool is_mask)
97{
98 struct sw_flow_key_range *range;
99 size_t start = rounddown(offset, sizeof(long));
100 size_t end = roundup(offset + size, sizeof(long));
101
102 if (!is_mask)
103 range = &match->range;
104 else
105 range = &match->mask->range;
106
107 if (range->start == range->end) {
108 range->start = start;
109 range->end = end;
110 return;
111 }
112
113 if (range->start > start)
114 range->start = start;
115
116 if (range->end < end)
117 range->end = end;
118}
119
120#define SW_FLOW_KEY_PUT(match, field, value, is_mask) \
121 do { \
122 update_range(match, offsetof(struct sw_flow_key, field), \
123 sizeof((match)->key->field), is_mask); \
124 if (is_mask) \
125 (match)->mask->key.field = value; \
126 else \
127 (match)->key->field = value; \
128 } while (0)
129
130#define SW_FLOW_KEY_MEMCPY_OFFSET(match, offset, value_p, len, is_mask) \
131 do { \
132 update_range(match, offset, len, is_mask); \
133 if (is_mask) \
134 memcpy((u8 *)&(match)->mask->key + offset, value_p, \
135 len); \
136 else \
137 memcpy((u8 *)(match)->key + offset, value_p, len); \
138 } while (0)
139
140#define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \
141 SW_FLOW_KEY_MEMCPY_OFFSET(match, offsetof(struct sw_flow_key, field), \
142 value_p, len, is_mask)
143
144#define SW_FLOW_KEY_MEMSET_FIELD(match, field, value, is_mask) \
145 do { \
146 update_range(match, offsetof(struct sw_flow_key, field), \
147 sizeof((match)->key->field), is_mask); \
148 if (is_mask) \
149 memset((u8 *)&(match)->mask->key.field, value, \
150 sizeof((match)->mask->key.field)); \
151 else \
152 memset((u8 *)&(match)->key->field, value, \
153 sizeof((match)->key->field)); \
154 } while (0)
155
156#define SW_FLOW_KEY_BITMAP_COPY(match, field, value_p, nbits, is_mask) ({ \
157 update_range(match, offsetof(struct sw_flow_key, field), \
158 bitmap_size(nbits), is_mask); \
159 bitmap_copy(is_mask ? (match)->mask->key.field : (match)->key->field, \
160 value_p, nbits); \
161})
162
163static bool match_validate(const struct sw_flow_match *match,
164 u64 key_attrs, u64 mask_attrs, bool log)
165{
166 u64 key_expected = 0;
167 u64 mask_allowed = key_attrs; /* At most allow all key attributes */
168
169 /* The following mask attributes allowed only if they
170 * pass the validation tests. */
171 mask_allowed &= ~((1 << OVS_KEY_ATTR_IPV4)
172 | (1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4)
173 | (1 << OVS_KEY_ATTR_IPV6)
174 | (1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6)
175 | (1 << OVS_KEY_ATTR_TCP)
176 | (1 << OVS_KEY_ATTR_TCP_FLAGS)
177 | (1 << OVS_KEY_ATTR_UDP)
178 | (1 << OVS_KEY_ATTR_SCTP)
179 | (1 << OVS_KEY_ATTR_ICMP)
180 | (1 << OVS_KEY_ATTR_ICMPV6)
181 | (1 << OVS_KEY_ATTR_ARP)
182 | (1 << OVS_KEY_ATTR_ND)
183 | (1 << OVS_KEY_ATTR_MPLS)
184 | (1 << OVS_KEY_ATTR_NSH));
185
186 /* Always allowed mask fields. */
187 mask_allowed |= ((1 << OVS_KEY_ATTR_TUNNEL)
188 | (1 << OVS_KEY_ATTR_IN_PORT)
189 | (1 << OVS_KEY_ATTR_ETHERTYPE));
190
191 /* Check key attributes. */
192 if (match->key->eth.type == htons(ETH_P_ARP)
193 || match->key->eth.type == htons(ETH_P_RARP)) {
194 key_expected |= 1 << OVS_KEY_ATTR_ARP;
195 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
196 mask_allowed |= 1 << OVS_KEY_ATTR_ARP;
197 }
198
199 if (eth_p_mpls(match->key->eth.type)) {
200 key_expected |= 1 << OVS_KEY_ATTR_MPLS;
201 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
202 mask_allowed |= 1 << OVS_KEY_ATTR_MPLS;
203 }
204
205 if (match->key->eth.type == htons(ETH_P_IP)) {
206 key_expected |= 1 << OVS_KEY_ATTR_IPV4;
207 if (match->mask && match->mask->key.eth.type == htons(0xffff)) {
208 mask_allowed |= 1 << OVS_KEY_ATTR_IPV4;
209 mask_allowed |= 1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4;
210 }
211
212 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
213 if (match->key->ip.proto == IPPROTO_UDP) {
214 key_expected |= 1 << OVS_KEY_ATTR_UDP;
215 if (match->mask && (match->mask->key.ip.proto == 0xff))
216 mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
217 }
218
219 if (match->key->ip.proto == IPPROTO_SCTP) {
220 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
221 if (match->mask && (match->mask->key.ip.proto == 0xff))
222 mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
223 }
224
225 if (match->key->ip.proto == IPPROTO_TCP) {
226 key_expected |= 1 << OVS_KEY_ATTR_TCP;
227 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
228 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
229 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
230 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
231 }
232 }
233
234 if (match->key->ip.proto == IPPROTO_ICMP) {
235 key_expected |= 1 << OVS_KEY_ATTR_ICMP;
236 if (match->mask && (match->mask->key.ip.proto == 0xff))
237 mask_allowed |= 1 << OVS_KEY_ATTR_ICMP;
238 }
239 }
240 }
241
242 if (match->key->eth.type == htons(ETH_P_IPV6)) {
243 key_expected |= 1 << OVS_KEY_ATTR_IPV6;
244 if (match->mask && match->mask->key.eth.type == htons(0xffff)) {
245 mask_allowed |= 1 << OVS_KEY_ATTR_IPV6;
246 mask_allowed |= 1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6;
247 }
248
249 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
250 if (match->key->ip.proto == IPPROTO_UDP) {
251 key_expected |= 1 << OVS_KEY_ATTR_UDP;
252 if (match->mask && (match->mask->key.ip.proto == 0xff))
253 mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
254 }
255
256 if (match->key->ip.proto == IPPROTO_SCTP) {
257 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
258 if (match->mask && (match->mask->key.ip.proto == 0xff))
259 mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
260 }
261
262 if (match->key->ip.proto == IPPROTO_TCP) {
263 key_expected |= 1 << OVS_KEY_ATTR_TCP;
264 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
265 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
266 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
267 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
268 }
269 }
270
271 if (match->key->ip.proto == IPPROTO_ICMPV6) {
272 key_expected |= 1 << OVS_KEY_ATTR_ICMPV6;
273 if (match->mask && (match->mask->key.ip.proto == 0xff))
274 mask_allowed |= 1 << OVS_KEY_ATTR_ICMPV6;
275
276 if (match->key->tp.src ==
277 htons(NDISC_NEIGHBOUR_SOLICITATION) ||
278 match->key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) {
279 key_expected |= 1 << OVS_KEY_ATTR_ND;
280 /* Original direction conntrack tuple
281 * uses the same space as the ND fields
282 * in the key, so both are not allowed
283 * at the same time.
284 */
285 mask_allowed &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6);
286 if (match->mask && (match->mask->key.tp.src == htons(0xff)))
287 mask_allowed |= 1 << OVS_KEY_ATTR_ND;
288 }
289 }
290 }
291 }
292
293 if (match->key->eth.type == htons(ETH_P_NSH)) {
294 key_expected |= 1 << OVS_KEY_ATTR_NSH;
295 if (match->mask &&
296 match->mask->key.eth.type == htons(0xffff)) {
297 mask_allowed |= 1 << OVS_KEY_ATTR_NSH;
298 }
299 }
300
301 if ((key_attrs & key_expected) != key_expected) {
302 /* Key attributes check failed. */
303 OVS_NLERR(log, "Missing key (keys=%llx, expected=%llx)",
304 (unsigned long long)key_attrs,
305 (unsigned long long)key_expected);
306 return false;
307 }
308
309 if ((mask_attrs & mask_allowed) != mask_attrs) {
310 /* Mask attributes check failed. */
311 OVS_NLERR(log, "Unexpected mask (mask=%llx, allowed=%llx)",
312 (unsigned long long)mask_attrs,
313 (unsigned long long)mask_allowed);
314 return false;
315 }
316
317 return true;
318}
319
320size_t ovs_tun_key_attr_size(void)
321{
322 /* Whenever adding new OVS_TUNNEL_KEY_ FIELDS, we should consider
323 * updating this function.
324 */
325 return nla_total_size_64bit(8) /* OVS_TUNNEL_KEY_ATTR_ID */
326 + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_SRC */
327 + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_DST */
328 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */
329 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */
330 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */
331 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */
332 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_OAM */
333 + nla_total_size(256) /* OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS */
334 /* OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS and
335 * OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS is mutually exclusive with
336 * OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS and covered by it.
337 */
338 + nla_total_size(2) /* OVS_TUNNEL_KEY_ATTR_TP_SRC */
339 + nla_total_size(2); /* OVS_TUNNEL_KEY_ATTR_TP_DST */
340}
341
342static size_t ovs_nsh_key_attr_size(void)
343{
344 /* Whenever adding new OVS_NSH_KEY_ FIELDS, we should consider
345 * updating this function.
346 */
347 return nla_total_size(NSH_BASE_HDR_LEN) /* OVS_NSH_KEY_ATTR_BASE */
348 /* OVS_NSH_KEY_ATTR_MD1 and OVS_NSH_KEY_ATTR_MD2 are
349 * mutually exclusive, so the bigger one can cover
350 * the small one.
351 */
352 + nla_total_size(NSH_CTX_HDRS_MAX_LEN);
353}
354
355size_t ovs_key_attr_size(void)
356{
357 /* Whenever adding new OVS_KEY_ FIELDS, we should consider
358 * updating this function.
359 */
360 BUILD_BUG_ON(OVS_KEY_ATTR_MAX != 32);
361
362 return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */
363 + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */
364 + ovs_tun_key_attr_size()
365 + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */
366 + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */
367 + nla_total_size(4) /* OVS_KEY_ATTR_DP_HASH */
368 + nla_total_size(4) /* OVS_KEY_ATTR_RECIRC_ID */
369 + nla_total_size(4) /* OVS_KEY_ATTR_CT_STATE */
370 + nla_total_size(2) /* OVS_KEY_ATTR_CT_ZONE */
371 + nla_total_size(4) /* OVS_KEY_ATTR_CT_MARK */
372 + nla_total_size(16) /* OVS_KEY_ATTR_CT_LABELS */
373 + nla_total_size(40) /* OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6 */
374 + nla_total_size(0) /* OVS_KEY_ATTR_NSH */
375 + ovs_nsh_key_attr_size()
376 + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */
377 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
378 + nla_total_size(4) /* OVS_KEY_ATTR_VLAN */
379 + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */
380 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
381 + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */
382 + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */
383 + nla_total_size(28) /* OVS_KEY_ATTR_ND */
384 + nla_total_size(2); /* OVS_KEY_ATTR_IPV6_EXTHDRS */
385}
386
387static const struct ovs_len_tbl ovs_vxlan_ext_key_lens[OVS_VXLAN_EXT_MAX + 1] = {
388 [OVS_VXLAN_EXT_GBP] = { .len = sizeof(u32) },
389};
390
391static const struct ovs_len_tbl ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = {
392 [OVS_TUNNEL_KEY_ATTR_ID] = { .len = sizeof(u64) },
393 [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = { .len = sizeof(u32) },
394 [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = { .len = sizeof(u32) },
395 [OVS_TUNNEL_KEY_ATTR_TOS] = { .len = 1 },
396 [OVS_TUNNEL_KEY_ATTR_TTL] = { .len = 1 },
397 [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = { .len = 0 },
398 [OVS_TUNNEL_KEY_ATTR_CSUM] = { .len = 0 },
399 [OVS_TUNNEL_KEY_ATTR_TP_SRC] = { .len = sizeof(u16) },
400 [OVS_TUNNEL_KEY_ATTR_TP_DST] = { .len = sizeof(u16) },
401 [OVS_TUNNEL_KEY_ATTR_OAM] = { .len = 0 },
402 [OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS] = { .len = OVS_ATTR_VARIABLE },
403 [OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS] = { .len = OVS_ATTR_NESTED,
404 .next = ovs_vxlan_ext_key_lens },
405 [OVS_TUNNEL_KEY_ATTR_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
406 [OVS_TUNNEL_KEY_ATTR_IPV6_DST] = { .len = sizeof(struct in6_addr) },
407 [OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS] = { .len = OVS_ATTR_VARIABLE },
408 [OVS_TUNNEL_KEY_ATTR_IPV4_INFO_BRIDGE] = { .len = 0 },
409};
410
411static const struct ovs_len_tbl
412ovs_nsh_key_attr_lens[OVS_NSH_KEY_ATTR_MAX + 1] = {
413 [OVS_NSH_KEY_ATTR_BASE] = { .len = sizeof(struct ovs_nsh_key_base) },
414 [OVS_NSH_KEY_ATTR_MD1] = { .len = sizeof(struct ovs_nsh_key_md1) },
415 [OVS_NSH_KEY_ATTR_MD2] = { .len = OVS_ATTR_VARIABLE },
416};
417
418/* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */
419static const struct ovs_len_tbl ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = {
420 [OVS_KEY_ATTR_ENCAP] = { .len = OVS_ATTR_NESTED },
421 [OVS_KEY_ATTR_PRIORITY] = { .len = sizeof(u32) },
422 [OVS_KEY_ATTR_IN_PORT] = { .len = sizeof(u32) },
423 [OVS_KEY_ATTR_SKB_MARK] = { .len = sizeof(u32) },
424 [OVS_KEY_ATTR_ETHERNET] = { .len = sizeof(struct ovs_key_ethernet) },
425 [OVS_KEY_ATTR_VLAN] = { .len = sizeof(__be16) },
426 [OVS_KEY_ATTR_ETHERTYPE] = { .len = sizeof(__be16) },
427 [OVS_KEY_ATTR_IPV4] = { .len = sizeof(struct ovs_key_ipv4) },
428 [OVS_KEY_ATTR_IPV6] = { .len = sizeof(struct ovs_key_ipv6) },
429 [OVS_KEY_ATTR_TCP] = { .len = sizeof(struct ovs_key_tcp) },
430 [OVS_KEY_ATTR_TCP_FLAGS] = { .len = sizeof(__be16) },
431 [OVS_KEY_ATTR_UDP] = { .len = sizeof(struct ovs_key_udp) },
432 [OVS_KEY_ATTR_SCTP] = { .len = sizeof(struct ovs_key_sctp) },
433 [OVS_KEY_ATTR_ICMP] = { .len = sizeof(struct ovs_key_icmp) },
434 [OVS_KEY_ATTR_ICMPV6] = { .len = sizeof(struct ovs_key_icmpv6) },
435 [OVS_KEY_ATTR_ARP] = { .len = sizeof(struct ovs_key_arp) },
436 [OVS_KEY_ATTR_ND] = { .len = sizeof(struct ovs_key_nd) },
437 [OVS_KEY_ATTR_RECIRC_ID] = { .len = sizeof(u32) },
438 [OVS_KEY_ATTR_DP_HASH] = { .len = sizeof(u32) },
439 [OVS_KEY_ATTR_TUNNEL] = { .len = OVS_ATTR_NESTED,
440 .next = ovs_tunnel_key_lens, },
441 [OVS_KEY_ATTR_MPLS] = { .len = OVS_ATTR_VARIABLE },
442 [OVS_KEY_ATTR_CT_STATE] = { .len = sizeof(u32) },
443 [OVS_KEY_ATTR_CT_ZONE] = { .len = sizeof(u16) },
444 [OVS_KEY_ATTR_CT_MARK] = { .len = sizeof(u32) },
445 [OVS_KEY_ATTR_CT_LABELS] = { .len = sizeof(struct ovs_key_ct_labels) },
446 [OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4] = {
447 .len = sizeof(struct ovs_key_ct_tuple_ipv4) },
448 [OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6] = {
449 .len = sizeof(struct ovs_key_ct_tuple_ipv6) },
450 [OVS_KEY_ATTR_NSH] = { .len = OVS_ATTR_NESTED,
451 .next = ovs_nsh_key_attr_lens, },
452 [OVS_KEY_ATTR_IPV6_EXTHDRS] = {
453 .len = sizeof(struct ovs_key_ipv6_exthdrs) },
454};
455
456static bool check_attr_len(unsigned int attr_len, unsigned int expected_len)
457{
458 return expected_len == attr_len ||
459 expected_len == OVS_ATTR_NESTED ||
460 expected_len == OVS_ATTR_VARIABLE;
461}
462
463static bool is_all_zero(const u8 *fp, size_t size)
464{
465 int i;
466
467 if (!fp)
468 return false;
469
470 for (i = 0; i < size; i++)
471 if (fp[i])
472 return false;
473
474 return true;
475}
476
477static int __parse_flow_nlattrs(const struct nlattr *attr,
478 const struct nlattr *a[],
479 u64 *attrsp, bool log, bool nz)
480{
481 const struct nlattr *nla;
482 u64 attrs;
483 int rem;
484
485 attrs = *attrsp;
486 nla_for_each_nested(nla, attr, rem) {
487 u16 type = nla_type(nla);
488 int expected_len;
489
490 if (type > OVS_KEY_ATTR_MAX) {
491 OVS_NLERR(log, "Key type %d is out of range max %d",
492 type, OVS_KEY_ATTR_MAX);
493 return -EINVAL;
494 }
495
496 if (type == OVS_KEY_ATTR_PACKET_TYPE ||
497 type == OVS_KEY_ATTR_ND_EXTENSIONS ||
498 type == OVS_KEY_ATTR_TUNNEL_INFO) {
499 OVS_NLERR(log, "Key type %d is not supported", type);
500 return -EINVAL;
501 }
502
503 if (attrs & (1ULL << type)) {
504 OVS_NLERR(log, "Duplicate key (type %d).", type);
505 return -EINVAL;
506 }
507
508 expected_len = ovs_key_lens[type].len;
509 if (!check_attr_len(nla_len(nla), expected_len)) {
510 OVS_NLERR(log, "Key %d has unexpected len %d expected %d",
511 type, nla_len(nla), expected_len);
512 return -EINVAL;
513 }
514
515 if (!nz || !is_all_zero(nla_data(nla), nla_len(nla))) {
516 attrs |= 1ULL << type;
517 a[type] = nla;
518 }
519 }
520 if (rem) {
521 OVS_NLERR(log, "Message has %d unknown bytes.", rem);
522 return -EINVAL;
523 }
524
525 *attrsp = attrs;
526 return 0;
527}
528
529static int parse_flow_mask_nlattrs(const struct nlattr *attr,
530 const struct nlattr *a[], u64 *attrsp,
531 bool log)
532{
533 return __parse_flow_nlattrs(attr, a, attrsp, log, true);
534}
535
536int parse_flow_nlattrs(const struct nlattr *attr, const struct nlattr *a[],
537 u64 *attrsp, bool log)
538{
539 return __parse_flow_nlattrs(attr, a, attrsp, log, false);
540}
541
542static int genev_tun_opt_from_nlattr(const struct nlattr *a,
543 struct sw_flow_match *match, bool is_mask,
544 bool log)
545{
546 unsigned long opt_key_offset;
547
548 if (nla_len(a) > sizeof(match->key->tun_opts)) {
549 OVS_NLERR(log, "Geneve option length err (len %d, max %zu).",
550 nla_len(a), sizeof(match->key->tun_opts));
551 return -EINVAL;
552 }
553
554 if (nla_len(a) % 4 != 0) {
555 OVS_NLERR(log, "Geneve opt len %d is not a multiple of 4.",
556 nla_len(a));
557 return -EINVAL;
558 }
559
560 /* We need to record the length of the options passed
561 * down, otherwise packets with the same format but
562 * additional options will be silently matched.
563 */
564 if (!is_mask) {
565 SW_FLOW_KEY_PUT(match, tun_opts_len, nla_len(a),
566 false);
567 } else {
568 /* This is somewhat unusual because it looks at
569 * both the key and mask while parsing the
570 * attributes (and by extension assumes the key
571 * is parsed first). Normally, we would verify
572 * that each is the correct length and that the
573 * attributes line up in the validate function.
574 * However, that is difficult because this is
575 * variable length and we won't have the
576 * information later.
577 */
578 if (match->key->tun_opts_len != nla_len(a)) {
579 OVS_NLERR(log, "Geneve option len %d != mask len %d",
580 match->key->tun_opts_len, nla_len(a));
581 return -EINVAL;
582 }
583
584 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
585 }
586
587 opt_key_offset = TUN_METADATA_OFFSET(nla_len(a));
588 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, nla_data(a),
589 nla_len(a), is_mask);
590 return 0;
591}
592
593static int vxlan_tun_opt_from_nlattr(const struct nlattr *attr,
594 struct sw_flow_match *match, bool is_mask,
595 bool log)
596{
597 struct nlattr *a;
598 int rem;
599 unsigned long opt_key_offset;
600 struct vxlan_metadata opts;
601
602 BUILD_BUG_ON(sizeof(opts) > sizeof(match->key->tun_opts));
603
604 memset(&opts, 0, sizeof(opts));
605 nla_for_each_nested(a, attr, rem) {
606 int type = nla_type(a);
607
608 if (type > OVS_VXLAN_EXT_MAX) {
609 OVS_NLERR(log, "VXLAN extension %d out of range max %d",
610 type, OVS_VXLAN_EXT_MAX);
611 return -EINVAL;
612 }
613
614 if (!check_attr_len(nla_len(a),
615 ovs_vxlan_ext_key_lens[type].len)) {
616 OVS_NLERR(log, "VXLAN extension %d has unexpected len %d expected %d",
617 type, nla_len(a),
618 ovs_vxlan_ext_key_lens[type].len);
619 return -EINVAL;
620 }
621
622 switch (type) {
623 case OVS_VXLAN_EXT_GBP:
624 opts.gbp = nla_get_u32(a);
625 break;
626 default:
627 OVS_NLERR(log, "Unknown VXLAN extension attribute %d",
628 type);
629 return -EINVAL;
630 }
631 }
632 if (rem) {
633 OVS_NLERR(log, "VXLAN extension message has %d unknown bytes.",
634 rem);
635 return -EINVAL;
636 }
637
638 if (!is_mask)
639 SW_FLOW_KEY_PUT(match, tun_opts_len, sizeof(opts), false);
640 else
641 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
642
643 opt_key_offset = TUN_METADATA_OFFSET(sizeof(opts));
644 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, &opts, sizeof(opts),
645 is_mask);
646 return 0;
647}
648
649static int erspan_tun_opt_from_nlattr(const struct nlattr *a,
650 struct sw_flow_match *match, bool is_mask,
651 bool log)
652{
653 unsigned long opt_key_offset;
654
655 BUILD_BUG_ON(sizeof(struct erspan_metadata) >
656 sizeof(match->key->tun_opts));
657
658 if (nla_len(a) > sizeof(match->key->tun_opts)) {
659 OVS_NLERR(log, "ERSPAN option length err (len %d, max %zu).",
660 nla_len(a), sizeof(match->key->tun_opts));
661 return -EINVAL;
662 }
663
664 if (!is_mask)
665 SW_FLOW_KEY_PUT(match, tun_opts_len,
666 sizeof(struct erspan_metadata), false);
667 else
668 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
669
670 opt_key_offset = TUN_METADATA_OFFSET(nla_len(a));
671 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, nla_data(a),
672 nla_len(a), is_mask);
673 return 0;
674}
675
676static int ip_tun_from_nlattr(const struct nlattr *attr,
677 struct sw_flow_match *match, bool is_mask,
678 bool log)
679{
680 bool ttl = false, ipv4 = false, ipv6 = false;
681 IP_TUNNEL_DECLARE_FLAGS(tun_flags) = { };
682 bool info_bridge_mode = false;
683 int opts_type = 0;
684 struct nlattr *a;
685 int rem;
686
687 nla_for_each_nested(a, attr, rem) {
688 int type = nla_type(a);
689 int err;
690
691 if (type > OVS_TUNNEL_KEY_ATTR_MAX) {
692 OVS_NLERR(log, "Tunnel attr %d out of range max %d",
693 type, OVS_TUNNEL_KEY_ATTR_MAX);
694 return -EINVAL;
695 }
696
697 if (!check_attr_len(nla_len(a),
698 ovs_tunnel_key_lens[type].len)) {
699 OVS_NLERR(log, "Tunnel attr %d has unexpected len %d expected %d",
700 type, nla_len(a), ovs_tunnel_key_lens[type].len);
701 return -EINVAL;
702 }
703
704 switch (type) {
705 case OVS_TUNNEL_KEY_ATTR_ID:
706 SW_FLOW_KEY_PUT(match, tun_key.tun_id,
707 nla_get_be64(a), is_mask);
708 __set_bit(IP_TUNNEL_KEY_BIT, tun_flags);
709 break;
710 case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
711 SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.src,
712 nla_get_in_addr(a), is_mask);
713 ipv4 = true;
714 break;
715 case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
716 SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.dst,
717 nla_get_in_addr(a), is_mask);
718 ipv4 = true;
719 break;
720 case OVS_TUNNEL_KEY_ATTR_IPV6_SRC:
721 SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.src,
722 nla_get_in6_addr(a), is_mask);
723 ipv6 = true;
724 break;
725 case OVS_TUNNEL_KEY_ATTR_IPV6_DST:
726 SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.dst,
727 nla_get_in6_addr(a), is_mask);
728 ipv6 = true;
729 break;
730 case OVS_TUNNEL_KEY_ATTR_TOS:
731 SW_FLOW_KEY_PUT(match, tun_key.tos,
732 nla_get_u8(a), is_mask);
733 break;
734 case OVS_TUNNEL_KEY_ATTR_TTL:
735 SW_FLOW_KEY_PUT(match, tun_key.ttl,
736 nla_get_u8(a), is_mask);
737 ttl = true;
738 break;
739 case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
740 __set_bit(IP_TUNNEL_DONT_FRAGMENT_BIT, tun_flags);
741 break;
742 case OVS_TUNNEL_KEY_ATTR_CSUM:
743 __set_bit(IP_TUNNEL_CSUM_BIT, tun_flags);
744 break;
745 case OVS_TUNNEL_KEY_ATTR_TP_SRC:
746 SW_FLOW_KEY_PUT(match, tun_key.tp_src,
747 nla_get_be16(a), is_mask);
748 break;
749 case OVS_TUNNEL_KEY_ATTR_TP_DST:
750 SW_FLOW_KEY_PUT(match, tun_key.tp_dst,
751 nla_get_be16(a), is_mask);
752 break;
753 case OVS_TUNNEL_KEY_ATTR_OAM:
754 __set_bit(IP_TUNNEL_OAM_BIT, tun_flags);
755 break;
756 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
757 if (opts_type) {
758 OVS_NLERR(log, "Multiple metadata blocks provided");
759 return -EINVAL;
760 }
761
762 err = genev_tun_opt_from_nlattr(a, match, is_mask, log);
763 if (err)
764 return err;
765
766 __set_bit(IP_TUNNEL_GENEVE_OPT_BIT, tun_flags);
767 opts_type = type;
768 break;
769 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
770 if (opts_type) {
771 OVS_NLERR(log, "Multiple metadata blocks provided");
772 return -EINVAL;
773 }
774
775 err = vxlan_tun_opt_from_nlattr(a, match, is_mask, log);
776 if (err)
777 return err;
778
779 __set_bit(IP_TUNNEL_VXLAN_OPT_BIT, tun_flags);
780 opts_type = type;
781 break;
782 case OVS_TUNNEL_KEY_ATTR_PAD:
783 break;
784 case OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS:
785 if (opts_type) {
786 OVS_NLERR(log, "Multiple metadata blocks provided");
787 return -EINVAL;
788 }
789
790 err = erspan_tun_opt_from_nlattr(a, match, is_mask,
791 log);
792 if (err)
793 return err;
794
795 __set_bit(IP_TUNNEL_ERSPAN_OPT_BIT, tun_flags);
796 opts_type = type;
797 break;
798 case OVS_TUNNEL_KEY_ATTR_IPV4_INFO_BRIDGE:
799 info_bridge_mode = true;
800 ipv4 = true;
801 break;
802 default:
803 OVS_NLERR(log, "Unknown IP tunnel attribute %d",
804 type);
805 return -EINVAL;
806 }
807 }
808
809 SW_FLOW_KEY_BITMAP_COPY(match, tun_key.tun_flags, tun_flags,
810 __IP_TUNNEL_FLAG_NUM, is_mask);
811 if (is_mask)
812 SW_FLOW_KEY_MEMSET_FIELD(match, tun_proto, 0xff, true);
813 else
814 SW_FLOW_KEY_PUT(match, tun_proto, ipv6 ? AF_INET6 : AF_INET,
815 false);
816
817 if (rem > 0) {
818 OVS_NLERR(log, "IP tunnel attribute has %d unknown bytes.",
819 rem);
820 return -EINVAL;
821 }
822
823 if (ipv4 && ipv6) {
824 OVS_NLERR(log, "Mixed IPv4 and IPv6 tunnel attributes");
825 return -EINVAL;
826 }
827
828 if (!is_mask) {
829 if (!ipv4 && !ipv6) {
830 OVS_NLERR(log, "IP tunnel dst address not specified");
831 return -EINVAL;
832 }
833 if (ipv4) {
834 if (info_bridge_mode) {
835 __clear_bit(IP_TUNNEL_KEY_BIT, tun_flags);
836
837 if (match->key->tun_key.u.ipv4.src ||
838 match->key->tun_key.u.ipv4.dst ||
839 match->key->tun_key.tp_src ||
840 match->key->tun_key.tp_dst ||
841 match->key->tun_key.ttl ||
842 match->key->tun_key.tos ||
843 !ip_tunnel_flags_empty(tun_flags)) {
844 OVS_NLERR(log, "IPv4 tun info is not correct");
845 return -EINVAL;
846 }
847 } else if (!match->key->tun_key.u.ipv4.dst) {
848 OVS_NLERR(log, "IPv4 tunnel dst address is zero");
849 return -EINVAL;
850 }
851 }
852 if (ipv6 && ipv6_addr_any(&match->key->tun_key.u.ipv6.dst)) {
853 OVS_NLERR(log, "IPv6 tunnel dst address is zero");
854 return -EINVAL;
855 }
856
857 if (!ttl && !info_bridge_mode) {
858 OVS_NLERR(log, "IP tunnel TTL not specified.");
859 return -EINVAL;
860 }
861 }
862
863 return opts_type;
864}
865
866static int vxlan_opt_to_nlattr(struct sk_buff *skb,
867 const void *tun_opts, int swkey_tun_opts_len)
868{
869 const struct vxlan_metadata *opts = tun_opts;
870 struct nlattr *nla;
871
872 nla = nla_nest_start_noflag(skb, OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS);
873 if (!nla)
874 return -EMSGSIZE;
875
876 if (nla_put_u32(skb, OVS_VXLAN_EXT_GBP, opts->gbp) < 0)
877 return -EMSGSIZE;
878
879 nla_nest_end(skb, nla);
880 return 0;
881}
882
883static int __ip_tun_to_nlattr(struct sk_buff *skb,
884 const struct ip_tunnel_key *output,
885 const void *tun_opts, int swkey_tun_opts_len,
886 unsigned short tun_proto, u8 mode)
887{
888 if (test_bit(IP_TUNNEL_KEY_BIT, output->tun_flags) &&
889 nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id,
890 OVS_TUNNEL_KEY_ATTR_PAD))
891 return -EMSGSIZE;
892
893 if (mode & IP_TUNNEL_INFO_BRIDGE)
894 return nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_IPV4_INFO_BRIDGE)
895 ? -EMSGSIZE : 0;
896
897 switch (tun_proto) {
898 case AF_INET:
899 if (output->u.ipv4.src &&
900 nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC,
901 output->u.ipv4.src))
902 return -EMSGSIZE;
903 if (output->u.ipv4.dst &&
904 nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST,
905 output->u.ipv4.dst))
906 return -EMSGSIZE;
907 break;
908 case AF_INET6:
909 if (!ipv6_addr_any(&output->u.ipv6.src) &&
910 nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_SRC,
911 &output->u.ipv6.src))
912 return -EMSGSIZE;
913 if (!ipv6_addr_any(&output->u.ipv6.dst) &&
914 nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_DST,
915 &output->u.ipv6.dst))
916 return -EMSGSIZE;
917 break;
918 }
919 if (output->tos &&
920 nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->tos))
921 return -EMSGSIZE;
922 if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ttl))
923 return -EMSGSIZE;
924 if (test_bit(IP_TUNNEL_DONT_FRAGMENT_BIT, output->tun_flags) &&
925 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT))
926 return -EMSGSIZE;
927 if (test_bit(IP_TUNNEL_CSUM_BIT, output->tun_flags) &&
928 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM))
929 return -EMSGSIZE;
930 if (output->tp_src &&
931 nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_SRC, output->tp_src))
932 return -EMSGSIZE;
933 if (output->tp_dst &&
934 nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_DST, output->tp_dst))
935 return -EMSGSIZE;
936 if (test_bit(IP_TUNNEL_OAM_BIT, output->tun_flags) &&
937 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM))
938 return -EMSGSIZE;
939 if (swkey_tun_opts_len) {
940 if (test_bit(IP_TUNNEL_GENEVE_OPT_BIT, output->tun_flags) &&
941 nla_put(skb, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS,
942 swkey_tun_opts_len, tun_opts))
943 return -EMSGSIZE;
944 else if (test_bit(IP_TUNNEL_VXLAN_OPT_BIT,
945 output->tun_flags) &&
946 vxlan_opt_to_nlattr(skb, tun_opts, swkey_tun_opts_len))
947 return -EMSGSIZE;
948 else if (test_bit(IP_TUNNEL_ERSPAN_OPT_BIT,
949 output->tun_flags) &&
950 nla_put(skb, OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS,
951 swkey_tun_opts_len, tun_opts))
952 return -EMSGSIZE;
953 }
954
955 return 0;
956}
957
958static int ip_tun_to_nlattr(struct sk_buff *skb,
959 const struct ip_tunnel_key *output,
960 const void *tun_opts, int swkey_tun_opts_len,
961 unsigned short tun_proto, u8 mode)
962{
963 struct nlattr *nla;
964 int err;
965
966 nla = nla_nest_start_noflag(skb, OVS_KEY_ATTR_TUNNEL);
967 if (!nla)
968 return -EMSGSIZE;
969
970 err = __ip_tun_to_nlattr(skb, output, tun_opts, swkey_tun_opts_len,
971 tun_proto, mode);
972 if (err)
973 return err;
974
975 nla_nest_end(skb, nla);
976 return 0;
977}
978
979int ovs_nla_put_tunnel_info(struct sk_buff *skb,
980 struct ip_tunnel_info *tun_info)
981{
982 return __ip_tun_to_nlattr(skb, &tun_info->key,
983 ip_tunnel_info_opts(tun_info),
984 tun_info->options_len,
985 ip_tunnel_info_af(tun_info), tun_info->mode);
986}
987
988static int encode_vlan_from_nlattrs(struct sw_flow_match *match,
989 const struct nlattr *a[],
990 bool is_mask, bool inner)
991{
992 __be16 tci = 0;
993 __be16 tpid = 0;
994
995 if (a[OVS_KEY_ATTR_VLAN])
996 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
997
998 if (a[OVS_KEY_ATTR_ETHERTYPE])
999 tpid = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
1000
1001 if (likely(!inner)) {
1002 SW_FLOW_KEY_PUT(match, eth.vlan.tpid, tpid, is_mask);
1003 SW_FLOW_KEY_PUT(match, eth.vlan.tci, tci, is_mask);
1004 } else {
1005 SW_FLOW_KEY_PUT(match, eth.cvlan.tpid, tpid, is_mask);
1006 SW_FLOW_KEY_PUT(match, eth.cvlan.tci, tci, is_mask);
1007 }
1008 return 0;
1009}
1010
1011static int validate_vlan_from_nlattrs(const struct sw_flow_match *match,
1012 u64 key_attrs, bool inner,
1013 const struct nlattr **a, bool log)
1014{
1015 __be16 tci = 0;
1016
1017 if (!((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) &&
1018 (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) &&
1019 eth_type_vlan(nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE])))) {
1020 /* Not a VLAN. */
1021 return 0;
1022 }
1023
1024 if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) &&
1025 (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) {
1026 OVS_NLERR(log, "Invalid %s frame", (inner) ? "C-VLAN" : "VLAN");
1027 return -EINVAL;
1028 }
1029
1030 if (a[OVS_KEY_ATTR_VLAN])
1031 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
1032
1033 if (!(tci & htons(VLAN_CFI_MASK))) {
1034 if (tci) {
1035 OVS_NLERR(log, "%s TCI does not have VLAN_CFI_MASK bit set.",
1036 (inner) ? "C-VLAN" : "VLAN");
1037 return -EINVAL;
1038 } else if (nla_len(a[OVS_KEY_ATTR_ENCAP])) {
1039 /* Corner case for truncated VLAN header. */
1040 OVS_NLERR(log, "Truncated %s header has non-zero encap attribute.",
1041 (inner) ? "C-VLAN" : "VLAN");
1042 return -EINVAL;
1043 }
1044 }
1045
1046 return 1;
1047}
1048
1049static int validate_vlan_mask_from_nlattrs(const struct sw_flow_match *match,
1050 u64 key_attrs, bool inner,
1051 const struct nlattr **a, bool log)
1052{
1053 __be16 tci = 0;
1054 __be16 tpid = 0;
1055 bool encap_valid = !!(match->key->eth.vlan.tci &
1056 htons(VLAN_CFI_MASK));
1057 bool i_encap_valid = !!(match->key->eth.cvlan.tci &
1058 htons(VLAN_CFI_MASK));
1059
1060 if (!(key_attrs & (1 << OVS_KEY_ATTR_ENCAP))) {
1061 /* Not a VLAN. */
1062 return 0;
1063 }
1064
1065 if ((!inner && !encap_valid) || (inner && !i_encap_valid)) {
1066 OVS_NLERR(log, "Encap mask attribute is set for non-%s frame.",
1067 (inner) ? "C-VLAN" : "VLAN");
1068 return -EINVAL;
1069 }
1070
1071 if (a[OVS_KEY_ATTR_VLAN])
1072 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
1073
1074 if (a[OVS_KEY_ATTR_ETHERTYPE])
1075 tpid = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
1076
1077 if (tpid != htons(0xffff)) {
1078 OVS_NLERR(log, "Must have an exact match on %s TPID (mask=%x).",
1079 (inner) ? "C-VLAN" : "VLAN", ntohs(tpid));
1080 return -EINVAL;
1081 }
1082 if (!(tci & htons(VLAN_CFI_MASK))) {
1083 OVS_NLERR(log, "%s TCI mask does not have exact match for VLAN_CFI_MASK bit.",
1084 (inner) ? "C-VLAN" : "VLAN");
1085 return -EINVAL;
1086 }
1087
1088 return 1;
1089}
1090
1091static int __parse_vlan_from_nlattrs(struct sw_flow_match *match,
1092 u64 *key_attrs, bool inner,
1093 const struct nlattr **a, bool is_mask,
1094 bool log)
1095{
1096 int err;
1097 const struct nlattr *encap;
1098
1099 if (!is_mask)
1100 err = validate_vlan_from_nlattrs(match, *key_attrs, inner,
1101 a, log);
1102 else
1103 err = validate_vlan_mask_from_nlattrs(match, *key_attrs, inner,
1104 a, log);
1105 if (err <= 0)
1106 return err;
1107
1108 err = encode_vlan_from_nlattrs(match, a, is_mask, inner);
1109 if (err)
1110 return err;
1111
1112 *key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP);
1113 *key_attrs &= ~(1 << OVS_KEY_ATTR_VLAN);
1114 *key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
1115
1116 encap = a[OVS_KEY_ATTR_ENCAP];
1117
1118 if (!is_mask)
1119 err = parse_flow_nlattrs(encap, a, key_attrs, log);
1120 else
1121 err = parse_flow_mask_nlattrs(encap, a, key_attrs, log);
1122
1123 return err;
1124}
1125
1126static int parse_vlan_from_nlattrs(struct sw_flow_match *match,
1127 u64 *key_attrs, const struct nlattr **a,
1128 bool is_mask, bool log)
1129{
1130 int err;
1131 bool encap_valid = false;
1132
1133 err = __parse_vlan_from_nlattrs(match, key_attrs, false, a,
1134 is_mask, log);
1135 if (err)
1136 return err;
1137
1138 encap_valid = !!(match->key->eth.vlan.tci & htons(VLAN_CFI_MASK));
1139 if (encap_valid) {
1140 err = __parse_vlan_from_nlattrs(match, key_attrs, true, a,
1141 is_mask, log);
1142 if (err)
1143 return err;
1144 }
1145
1146 return 0;
1147}
1148
1149static int parse_eth_type_from_nlattrs(struct sw_flow_match *match,
1150 u64 *attrs, const struct nlattr **a,
1151 bool is_mask, bool log)
1152{
1153 __be16 eth_type;
1154
1155 eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
1156 if (is_mask) {
1157 /* Always exact match EtherType. */
1158 eth_type = htons(0xffff);
1159 } else if (!eth_proto_is_802_3(eth_type)) {
1160 OVS_NLERR(log, "EtherType %x is less than min %x",
1161 ntohs(eth_type), ETH_P_802_3_MIN);
1162 return -EINVAL;
1163 }
1164
1165 SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask);
1166 *attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
1167 return 0;
1168}
1169
1170static int metadata_from_nlattrs(struct net *net, struct sw_flow_match *match,
1171 u64 *attrs, const struct nlattr **a,
1172 bool is_mask, bool log)
1173{
1174 u8 mac_proto = MAC_PROTO_ETHERNET;
1175
1176 if (*attrs & (1 << OVS_KEY_ATTR_DP_HASH)) {
1177 u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]);
1178
1179 SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask);
1180 *attrs &= ~(1 << OVS_KEY_ATTR_DP_HASH);
1181 }
1182
1183 if (*attrs & (1 << OVS_KEY_ATTR_RECIRC_ID)) {
1184 u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]);
1185
1186 SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask);
1187 *attrs &= ~(1 << OVS_KEY_ATTR_RECIRC_ID);
1188 }
1189
1190 if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) {
1191 SW_FLOW_KEY_PUT(match, phy.priority,
1192 nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask);
1193 *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY);
1194 }
1195
1196 if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) {
1197 u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]);
1198
1199 if (is_mask) {
1200 in_port = 0xffffffff; /* Always exact match in_port. */
1201 } else if (in_port >= DP_MAX_PORTS) {
1202 OVS_NLERR(log, "Port %d exceeds max allowable %d",
1203 in_port, DP_MAX_PORTS);
1204 return -EINVAL;
1205 }
1206
1207 SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask);
1208 *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT);
1209 } else if (!is_mask) {
1210 SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask);
1211 }
1212
1213 if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) {
1214 uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]);
1215
1216 SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask);
1217 *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK);
1218 }
1219 if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) {
1220 if (ip_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match,
1221 is_mask, log) < 0)
1222 return -EINVAL;
1223 *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL);
1224 }
1225
1226 if (*attrs & (1 << OVS_KEY_ATTR_CT_STATE) &&
1227 ovs_ct_verify(net, OVS_KEY_ATTR_CT_STATE)) {
1228 u32 ct_state = nla_get_u32(a[OVS_KEY_ATTR_CT_STATE]);
1229
1230 if (ct_state & ~CT_SUPPORTED_MASK) {
1231 OVS_NLERR(log, "ct_state flags %08x unsupported",
1232 ct_state);
1233 return -EINVAL;
1234 }
1235
1236 SW_FLOW_KEY_PUT(match, ct_state, ct_state, is_mask);
1237 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_STATE);
1238 }
1239 if (*attrs & (1 << OVS_KEY_ATTR_CT_ZONE) &&
1240 ovs_ct_verify(net, OVS_KEY_ATTR_CT_ZONE)) {
1241 u16 ct_zone = nla_get_u16(a[OVS_KEY_ATTR_CT_ZONE]);
1242
1243 SW_FLOW_KEY_PUT(match, ct_zone, ct_zone, is_mask);
1244 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ZONE);
1245 }
1246 if (*attrs & (1 << OVS_KEY_ATTR_CT_MARK) &&
1247 ovs_ct_verify(net, OVS_KEY_ATTR_CT_MARK)) {
1248 u32 mark = nla_get_u32(a[OVS_KEY_ATTR_CT_MARK]);
1249
1250 SW_FLOW_KEY_PUT(match, ct.mark, mark, is_mask);
1251 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_MARK);
1252 }
1253 if (*attrs & (1 << OVS_KEY_ATTR_CT_LABELS) &&
1254 ovs_ct_verify(net, OVS_KEY_ATTR_CT_LABELS)) {
1255 const struct ovs_key_ct_labels *cl;
1256
1257 cl = nla_data(a[OVS_KEY_ATTR_CT_LABELS]);
1258 SW_FLOW_KEY_MEMCPY(match, ct.labels, cl->ct_labels,
1259 sizeof(*cl), is_mask);
1260 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_LABELS);
1261 }
1262 if (*attrs & (1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4)) {
1263 const struct ovs_key_ct_tuple_ipv4 *ct;
1264
1265 ct = nla_data(a[OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4]);
1266
1267 SW_FLOW_KEY_PUT(match, ipv4.ct_orig.src, ct->ipv4_src, is_mask);
1268 SW_FLOW_KEY_PUT(match, ipv4.ct_orig.dst, ct->ipv4_dst, is_mask);
1269 SW_FLOW_KEY_PUT(match, ct.orig_tp.src, ct->src_port, is_mask);
1270 SW_FLOW_KEY_PUT(match, ct.orig_tp.dst, ct->dst_port, is_mask);
1271 SW_FLOW_KEY_PUT(match, ct_orig_proto, ct->ipv4_proto, is_mask);
1272 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4);
1273 }
1274 if (*attrs & (1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6)) {
1275 const struct ovs_key_ct_tuple_ipv6 *ct;
1276
1277 ct = nla_data(a[OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6]);
1278
1279 SW_FLOW_KEY_MEMCPY(match, ipv6.ct_orig.src, &ct->ipv6_src,
1280 sizeof(match->key->ipv6.ct_orig.src),
1281 is_mask);
1282 SW_FLOW_KEY_MEMCPY(match, ipv6.ct_orig.dst, &ct->ipv6_dst,
1283 sizeof(match->key->ipv6.ct_orig.dst),
1284 is_mask);
1285 SW_FLOW_KEY_PUT(match, ct.orig_tp.src, ct->src_port, is_mask);
1286 SW_FLOW_KEY_PUT(match, ct.orig_tp.dst, ct->dst_port, is_mask);
1287 SW_FLOW_KEY_PUT(match, ct_orig_proto, ct->ipv6_proto, is_mask);
1288 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6);
1289 }
1290
1291 /* For layer 3 packets the Ethernet type is provided
1292 * and treated as metadata but no MAC addresses are provided.
1293 */
1294 if (!(*attrs & (1ULL << OVS_KEY_ATTR_ETHERNET)) &&
1295 (*attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)))
1296 mac_proto = MAC_PROTO_NONE;
1297
1298 /* Always exact match mac_proto */
1299 SW_FLOW_KEY_PUT(match, mac_proto, is_mask ? 0xff : mac_proto, is_mask);
1300
1301 if (mac_proto == MAC_PROTO_NONE)
1302 return parse_eth_type_from_nlattrs(match, attrs, a, is_mask,
1303 log);
1304
1305 return 0;
1306}
1307
1308/*
1309 * Constructs NSH header 'nh' from attributes of OVS_ACTION_ATTR_PUSH_NSH,
1310 * where 'nh' points to a memory block of 'size' bytes. It's assumed that
1311 * attributes were previously validated with validate_push_nsh().
1312 */
1313int nsh_hdr_from_nlattr(const struct nlattr *attr,
1314 struct nshhdr *nh, size_t size)
1315{
1316 struct nlattr *a;
1317 int rem;
1318 u8 flags = 0;
1319 u8 ttl = 0;
1320 int mdlen = 0;
1321
1322 if (size < NSH_BASE_HDR_LEN)
1323 return -ENOBUFS;
1324
1325 nla_for_each_nested(a, attr, rem) {
1326 int type = nla_type(a);
1327
1328 switch (type) {
1329 case OVS_NSH_KEY_ATTR_BASE: {
1330 const struct ovs_nsh_key_base *base = nla_data(a);
1331
1332 flags = base->flags;
1333 ttl = base->ttl;
1334 nh->np = base->np;
1335 nh->mdtype = base->mdtype;
1336 nh->path_hdr = base->path_hdr;
1337 break;
1338 }
1339 case OVS_NSH_KEY_ATTR_MD1:
1340 mdlen = nla_len(a);
1341 if (mdlen > size - NSH_BASE_HDR_LEN)
1342 return -ENOBUFS;
1343 memcpy(&nh->md1, nla_data(a), mdlen);
1344 break;
1345
1346 case OVS_NSH_KEY_ATTR_MD2:
1347 mdlen = nla_len(a);
1348 if (mdlen > size - NSH_BASE_HDR_LEN)
1349 return -ENOBUFS;
1350 memcpy(&nh->md2, nla_data(a), mdlen);
1351 break;
1352
1353 default:
1354 return -EINVAL;
1355 }
1356 }
1357
1358 /* nsh header length = NSH_BASE_HDR_LEN + mdlen */
1359 nh->ver_flags_ttl_len = 0;
1360 nsh_set_flags_ttl_len(nh, flags, ttl, NSH_BASE_HDR_LEN + mdlen);
1361
1362 return 0;
1363}
1364
1365static int nsh_key_put_from_nlattr(const struct nlattr *attr,
1366 struct sw_flow_match *match, bool is_mask,
1367 bool is_push_nsh, bool log)
1368{
1369 struct nlattr *a;
1370 int rem;
1371 bool has_base = false;
1372 bool has_md1 = false;
1373 bool has_md2 = false;
1374 u8 mdtype = 0;
1375 int mdlen = 0;
1376
1377 if (WARN_ON(is_push_nsh && is_mask))
1378 return -EINVAL;
1379
1380 nla_for_each_nested(a, attr, rem) {
1381 int type = nla_type(a);
1382 int i;
1383
1384 if (type > OVS_NSH_KEY_ATTR_MAX) {
1385 OVS_NLERR(log, "nsh attr %d is out of range max %d",
1386 type, OVS_NSH_KEY_ATTR_MAX);
1387 return -EINVAL;
1388 }
1389
1390 if (!check_attr_len(nla_len(a),
1391 ovs_nsh_key_attr_lens[type].len)) {
1392 OVS_NLERR(
1393 log,
1394 "nsh attr %d has unexpected len %d expected %d",
1395 type,
1396 nla_len(a),
1397 ovs_nsh_key_attr_lens[type].len
1398 );
1399 return -EINVAL;
1400 }
1401
1402 switch (type) {
1403 case OVS_NSH_KEY_ATTR_BASE: {
1404 const struct ovs_nsh_key_base *base = nla_data(a);
1405
1406 has_base = true;
1407 mdtype = base->mdtype;
1408 SW_FLOW_KEY_PUT(match, nsh.base.flags,
1409 base->flags, is_mask);
1410 SW_FLOW_KEY_PUT(match, nsh.base.ttl,
1411 base->ttl, is_mask);
1412 SW_FLOW_KEY_PUT(match, nsh.base.mdtype,
1413 base->mdtype, is_mask);
1414 SW_FLOW_KEY_PUT(match, nsh.base.np,
1415 base->np, is_mask);
1416 SW_FLOW_KEY_PUT(match, nsh.base.path_hdr,
1417 base->path_hdr, is_mask);
1418 break;
1419 }
1420 case OVS_NSH_KEY_ATTR_MD1: {
1421 const struct ovs_nsh_key_md1 *md1 = nla_data(a);
1422
1423 has_md1 = true;
1424 for (i = 0; i < NSH_MD1_CONTEXT_SIZE; i++)
1425 SW_FLOW_KEY_PUT(match, nsh.context[i],
1426 md1->context[i], is_mask);
1427 break;
1428 }
1429 case OVS_NSH_KEY_ATTR_MD2:
1430 if (!is_push_nsh) /* Not supported MD type 2 yet */
1431 return -ENOTSUPP;
1432
1433 has_md2 = true;
1434 mdlen = nla_len(a);
1435 if (mdlen > NSH_CTX_HDRS_MAX_LEN || mdlen <= 0) {
1436 OVS_NLERR(
1437 log,
1438 "Invalid MD length %d for MD type %d",
1439 mdlen,
1440 mdtype
1441 );
1442 return -EINVAL;
1443 }
1444 break;
1445 default:
1446 OVS_NLERR(log, "Unknown nsh attribute %d",
1447 type);
1448 return -EINVAL;
1449 }
1450 }
1451
1452 if (rem > 0) {
1453 OVS_NLERR(log, "nsh attribute has %d unknown bytes.", rem);
1454 return -EINVAL;
1455 }
1456
1457 if (has_md1 && has_md2) {
1458 OVS_NLERR(
1459 1,
1460 "invalid nsh attribute: md1 and md2 are exclusive."
1461 );
1462 return -EINVAL;
1463 }
1464
1465 if (!is_mask) {
1466 if ((has_md1 && mdtype != NSH_M_TYPE1) ||
1467 (has_md2 && mdtype != NSH_M_TYPE2)) {
1468 OVS_NLERR(1, "nsh attribute has unmatched MD type %d.",
1469 mdtype);
1470 return -EINVAL;
1471 }
1472
1473 if (is_push_nsh &&
1474 (!has_base || (!has_md1 && !has_md2))) {
1475 OVS_NLERR(
1476 1,
1477 "push_nsh: missing base or metadata attributes"
1478 );
1479 return -EINVAL;
1480 }
1481 }
1482
1483 return 0;
1484}
1485
1486static int ovs_key_from_nlattrs(struct net *net, struct sw_flow_match *match,
1487 u64 attrs, const struct nlattr **a,
1488 bool is_mask, bool log)
1489{
1490 int err;
1491
1492 err = metadata_from_nlattrs(net, match, &attrs, a, is_mask, log);
1493 if (err)
1494 return err;
1495
1496 if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) {
1497 const struct ovs_key_ethernet *eth_key;
1498
1499 eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]);
1500 SW_FLOW_KEY_MEMCPY(match, eth.src,
1501 eth_key->eth_src, ETH_ALEN, is_mask);
1502 SW_FLOW_KEY_MEMCPY(match, eth.dst,
1503 eth_key->eth_dst, ETH_ALEN, is_mask);
1504 attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET);
1505
1506 if (attrs & (1 << OVS_KEY_ATTR_VLAN)) {
1507 /* VLAN attribute is always parsed before getting here since it
1508 * may occur multiple times.
1509 */
1510 OVS_NLERR(log, "VLAN attribute unexpected.");
1511 return -EINVAL;
1512 }
1513
1514 if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) {
1515 err = parse_eth_type_from_nlattrs(match, &attrs, a, is_mask,
1516 log);
1517 if (err)
1518 return err;
1519 } else if (!is_mask) {
1520 SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask);
1521 }
1522 } else if (!match->key->eth.type) {
1523 OVS_NLERR(log, "Either Ethernet header or EtherType is required.");
1524 return -EINVAL;
1525 }
1526
1527 if (attrs & (1 << OVS_KEY_ATTR_IPV4)) {
1528 const struct ovs_key_ipv4 *ipv4_key;
1529
1530 ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]);
1531 if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) {
1532 OVS_NLERR(log, "IPv4 frag type %d is out of range max %d",
1533 ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX);
1534 return -EINVAL;
1535 }
1536 SW_FLOW_KEY_PUT(match, ip.proto,
1537 ipv4_key->ipv4_proto, is_mask);
1538 SW_FLOW_KEY_PUT(match, ip.tos,
1539 ipv4_key->ipv4_tos, is_mask);
1540 SW_FLOW_KEY_PUT(match, ip.ttl,
1541 ipv4_key->ipv4_ttl, is_mask);
1542 SW_FLOW_KEY_PUT(match, ip.frag,
1543 ipv4_key->ipv4_frag, is_mask);
1544 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
1545 ipv4_key->ipv4_src, is_mask);
1546 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
1547 ipv4_key->ipv4_dst, is_mask);
1548 attrs &= ~(1 << OVS_KEY_ATTR_IPV4);
1549 }
1550
1551 if (attrs & (1 << OVS_KEY_ATTR_IPV6)) {
1552 const struct ovs_key_ipv6 *ipv6_key;
1553
1554 ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]);
1555 if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) {
1556 OVS_NLERR(log, "IPv6 frag type %d is out of range max %d",
1557 ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX);
1558 return -EINVAL;
1559 }
1560
1561 if (!is_mask && ipv6_key->ipv6_label & htonl(0xFFF00000)) {
1562 OVS_NLERR(log, "IPv6 flow label %x is out of range (max=%x)",
1563 ntohl(ipv6_key->ipv6_label), (1 << 20) - 1);
1564 return -EINVAL;
1565 }
1566
1567 SW_FLOW_KEY_PUT(match, ipv6.label,
1568 ipv6_key->ipv6_label, is_mask);
1569 SW_FLOW_KEY_PUT(match, ip.proto,
1570 ipv6_key->ipv6_proto, is_mask);
1571 SW_FLOW_KEY_PUT(match, ip.tos,
1572 ipv6_key->ipv6_tclass, is_mask);
1573 SW_FLOW_KEY_PUT(match, ip.ttl,
1574 ipv6_key->ipv6_hlimit, is_mask);
1575 SW_FLOW_KEY_PUT(match, ip.frag,
1576 ipv6_key->ipv6_frag, is_mask);
1577 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src,
1578 ipv6_key->ipv6_src,
1579 sizeof(match->key->ipv6.addr.src),
1580 is_mask);
1581 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst,
1582 ipv6_key->ipv6_dst,
1583 sizeof(match->key->ipv6.addr.dst),
1584 is_mask);
1585
1586 attrs &= ~(1 << OVS_KEY_ATTR_IPV6);
1587 }
1588
1589 if (attrs & (1ULL << OVS_KEY_ATTR_IPV6_EXTHDRS)) {
1590 const struct ovs_key_ipv6_exthdrs *ipv6_exthdrs_key;
1591
1592 ipv6_exthdrs_key = nla_data(a[OVS_KEY_ATTR_IPV6_EXTHDRS]);
1593
1594 SW_FLOW_KEY_PUT(match, ipv6.exthdrs,
1595 ipv6_exthdrs_key->hdrs, is_mask);
1596
1597 attrs &= ~(1ULL << OVS_KEY_ATTR_IPV6_EXTHDRS);
1598 }
1599
1600 if (attrs & (1 << OVS_KEY_ATTR_ARP)) {
1601 const struct ovs_key_arp *arp_key;
1602
1603 arp_key = nla_data(a[OVS_KEY_ATTR_ARP]);
1604 if (!is_mask && (arp_key->arp_op & htons(0xff00))) {
1605 OVS_NLERR(log, "Unknown ARP opcode (opcode=%d).",
1606 arp_key->arp_op);
1607 return -EINVAL;
1608 }
1609
1610 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
1611 arp_key->arp_sip, is_mask);
1612 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
1613 arp_key->arp_tip, is_mask);
1614 SW_FLOW_KEY_PUT(match, ip.proto,
1615 ntohs(arp_key->arp_op), is_mask);
1616 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha,
1617 arp_key->arp_sha, ETH_ALEN, is_mask);
1618 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha,
1619 arp_key->arp_tha, ETH_ALEN, is_mask);
1620
1621 attrs &= ~(1 << OVS_KEY_ATTR_ARP);
1622 }
1623
1624 if (attrs & (1 << OVS_KEY_ATTR_NSH)) {
1625 if (nsh_key_put_from_nlattr(a[OVS_KEY_ATTR_NSH], match,
1626 is_mask, false, log) < 0)
1627 return -EINVAL;
1628 attrs &= ~(1 << OVS_KEY_ATTR_NSH);
1629 }
1630
1631 if (attrs & (1 << OVS_KEY_ATTR_MPLS)) {
1632 const struct ovs_key_mpls *mpls_key;
1633 u32 hdr_len;
1634 u32 label_count, label_count_mask, i;
1635
1636 mpls_key = nla_data(a[OVS_KEY_ATTR_MPLS]);
1637 hdr_len = nla_len(a[OVS_KEY_ATTR_MPLS]);
1638 label_count = hdr_len / sizeof(struct ovs_key_mpls);
1639
1640 if (label_count == 0 || label_count > MPLS_LABEL_DEPTH ||
1641 hdr_len % sizeof(struct ovs_key_mpls))
1642 return -EINVAL;
1643
1644 label_count_mask = GENMASK(label_count - 1, 0);
1645
1646 for (i = 0 ; i < label_count; i++)
1647 SW_FLOW_KEY_PUT(match, mpls.lse[i],
1648 mpls_key[i].mpls_lse, is_mask);
1649
1650 SW_FLOW_KEY_PUT(match, mpls.num_labels_mask,
1651 label_count_mask, is_mask);
1652
1653 attrs &= ~(1 << OVS_KEY_ATTR_MPLS);
1654 }
1655
1656 if (attrs & (1 << OVS_KEY_ATTR_TCP)) {
1657 const struct ovs_key_tcp *tcp_key;
1658
1659 tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]);
1660 SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask);
1661 SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask);
1662 attrs &= ~(1 << OVS_KEY_ATTR_TCP);
1663 }
1664
1665 if (attrs & (1 << OVS_KEY_ATTR_TCP_FLAGS)) {
1666 SW_FLOW_KEY_PUT(match, tp.flags,
1667 nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]),
1668 is_mask);
1669 attrs &= ~(1 << OVS_KEY_ATTR_TCP_FLAGS);
1670 }
1671
1672 if (attrs & (1 << OVS_KEY_ATTR_UDP)) {
1673 const struct ovs_key_udp *udp_key;
1674
1675 udp_key = nla_data(a[OVS_KEY_ATTR_UDP]);
1676 SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask);
1677 SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask);
1678 attrs &= ~(1 << OVS_KEY_ATTR_UDP);
1679 }
1680
1681 if (attrs & (1 << OVS_KEY_ATTR_SCTP)) {
1682 const struct ovs_key_sctp *sctp_key;
1683
1684 sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]);
1685 SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask);
1686 SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask);
1687 attrs &= ~(1 << OVS_KEY_ATTR_SCTP);
1688 }
1689
1690 if (attrs & (1 << OVS_KEY_ATTR_ICMP)) {
1691 const struct ovs_key_icmp *icmp_key;
1692
1693 icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]);
1694 SW_FLOW_KEY_PUT(match, tp.src,
1695 htons(icmp_key->icmp_type), is_mask);
1696 SW_FLOW_KEY_PUT(match, tp.dst,
1697 htons(icmp_key->icmp_code), is_mask);
1698 attrs &= ~(1 << OVS_KEY_ATTR_ICMP);
1699 }
1700
1701 if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) {
1702 const struct ovs_key_icmpv6 *icmpv6_key;
1703
1704 icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]);
1705 SW_FLOW_KEY_PUT(match, tp.src,
1706 htons(icmpv6_key->icmpv6_type), is_mask);
1707 SW_FLOW_KEY_PUT(match, tp.dst,
1708 htons(icmpv6_key->icmpv6_code), is_mask);
1709 attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6);
1710 }
1711
1712 if (attrs & (1 << OVS_KEY_ATTR_ND)) {
1713 const struct ovs_key_nd *nd_key;
1714
1715 nd_key = nla_data(a[OVS_KEY_ATTR_ND]);
1716 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target,
1717 nd_key->nd_target,
1718 sizeof(match->key->ipv6.nd.target),
1719 is_mask);
1720 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll,
1721 nd_key->nd_sll, ETH_ALEN, is_mask);
1722 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll,
1723 nd_key->nd_tll, ETH_ALEN, is_mask);
1724 attrs &= ~(1 << OVS_KEY_ATTR_ND);
1725 }
1726
1727 if (attrs != 0) {
1728 OVS_NLERR(log, "Unknown key attributes %llx",
1729 (unsigned long long)attrs);
1730 return -EINVAL;
1731 }
1732
1733 return 0;
1734}
1735
1736static void nlattr_set(struct nlattr *attr, u8 val,
1737 const struct ovs_len_tbl *tbl)
1738{
1739 struct nlattr *nla;
1740 int rem;
1741
1742 /* The nlattr stream should already have been validated */
1743 nla_for_each_nested(nla, attr, rem) {
1744 if (tbl[nla_type(nla)].len == OVS_ATTR_NESTED)
1745 nlattr_set(nla, val, tbl[nla_type(nla)].next ? : tbl);
1746 else
1747 memset(nla_data(nla), val, nla_len(nla));
1748
1749 if (nla_type(nla) == OVS_KEY_ATTR_CT_STATE)
1750 *(u32 *)nla_data(nla) &= CT_SUPPORTED_MASK;
1751 }
1752}
1753
1754static void mask_set_nlattr(struct nlattr *attr, u8 val)
1755{
1756 nlattr_set(attr, val, ovs_key_lens);
1757}
1758
1759/**
1760 * ovs_nla_get_match - parses Netlink attributes into a flow key and
1761 * mask. In case the 'mask' is NULL, the flow is treated as exact match
1762 * flow. Otherwise, it is treated as a wildcarded flow, except the mask
1763 * does not include any don't care bit.
1764 * @net: Used to determine per-namespace field support.
1765 * @match: receives the extracted flow match information.
1766 * @nla_key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
1767 * sequence. The fields should of the packet that triggered the creation
1768 * of this flow.
1769 * @nla_mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_*
1770 * Netlink attribute specifies the mask field of the wildcarded flow.
1771 * @log: Boolean to allow kernel error logging. Normally true, but when
1772 * probing for feature compatibility this should be passed in as false to
1773 * suppress unnecessary error logging.
1774 */
1775int ovs_nla_get_match(struct net *net, struct sw_flow_match *match,
1776 const struct nlattr *nla_key,
1777 const struct nlattr *nla_mask,
1778 bool log)
1779{
1780 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
1781 struct nlattr *newmask = NULL;
1782 u64 key_attrs = 0;
1783 u64 mask_attrs = 0;
1784 int err;
1785
1786 err = parse_flow_nlattrs(nla_key, a, &key_attrs, log);
1787 if (err)
1788 return err;
1789
1790 err = parse_vlan_from_nlattrs(match, &key_attrs, a, false, log);
1791 if (err)
1792 return err;
1793
1794 err = ovs_key_from_nlattrs(net, match, key_attrs, a, false, log);
1795 if (err)
1796 return err;
1797
1798 if (match->mask) {
1799 if (!nla_mask) {
1800 /* Create an exact match mask. We need to set to 0xff
1801 * all the 'match->mask' fields that have been touched
1802 * in 'match->key'. We cannot simply memset
1803 * 'match->mask', because padding bytes and fields not
1804 * specified in 'match->key' should be left to 0.
1805 * Instead, we use a stream of netlink attributes,
1806 * copied from 'key' and set to 0xff.
1807 * ovs_key_from_nlattrs() will take care of filling
1808 * 'match->mask' appropriately.
1809 */
1810 newmask = kmemdup(nla_key,
1811 nla_total_size(nla_len(nla_key)),
1812 GFP_KERNEL);
1813 if (!newmask)
1814 return -ENOMEM;
1815
1816 mask_set_nlattr(newmask, 0xff);
1817
1818 /* The userspace does not send tunnel attributes that
1819 * are 0, but we should not wildcard them nonetheless.
1820 */
1821 if (match->key->tun_proto)
1822 SW_FLOW_KEY_MEMSET_FIELD(match, tun_key,
1823 0xff, true);
1824
1825 nla_mask = newmask;
1826 }
1827
1828 err = parse_flow_mask_nlattrs(nla_mask, a, &mask_attrs, log);
1829 if (err)
1830 goto free_newmask;
1831
1832 /* Always match on tci. */
1833 SW_FLOW_KEY_PUT(match, eth.vlan.tci, htons(0xffff), true);
1834 SW_FLOW_KEY_PUT(match, eth.cvlan.tci, htons(0xffff), true);
1835
1836 err = parse_vlan_from_nlattrs(match, &mask_attrs, a, true, log);
1837 if (err)
1838 goto free_newmask;
1839
1840 err = ovs_key_from_nlattrs(net, match, mask_attrs, a, true,
1841 log);
1842 if (err)
1843 goto free_newmask;
1844 }
1845
1846 if (!match_validate(match, key_attrs, mask_attrs, log))
1847 err = -EINVAL;
1848
1849free_newmask:
1850 kfree(newmask);
1851 return err;
1852}
1853
1854static size_t get_ufid_len(const struct nlattr *attr, bool log)
1855{
1856 size_t len;
1857
1858 if (!attr)
1859 return 0;
1860
1861 len = nla_len(attr);
1862 if (len < 1 || len > MAX_UFID_LENGTH) {
1863 OVS_NLERR(log, "ufid size %u bytes exceeds the range (1, %d)",
1864 nla_len(attr), MAX_UFID_LENGTH);
1865 return 0;
1866 }
1867
1868 return len;
1869}
1870
1871/* Initializes 'flow->ufid', returning true if 'attr' contains a valid UFID,
1872 * or false otherwise.
1873 */
1874bool ovs_nla_get_ufid(struct sw_flow_id *sfid, const struct nlattr *attr,
1875 bool log)
1876{
1877 sfid->ufid_len = get_ufid_len(attr, log);
1878 if (sfid->ufid_len)
1879 memcpy(sfid->ufid, nla_data(attr), sfid->ufid_len);
1880
1881 return sfid->ufid_len;
1882}
1883
1884int ovs_nla_get_identifier(struct sw_flow_id *sfid, const struct nlattr *ufid,
1885 const struct sw_flow_key *key, bool log)
1886{
1887 struct sw_flow_key *new_key;
1888
1889 if (ovs_nla_get_ufid(sfid, ufid, log))
1890 return 0;
1891
1892 /* If UFID was not provided, use unmasked key. */
1893 new_key = kmalloc_obj(*new_key);
1894 if (!new_key)
1895 return -ENOMEM;
1896 memcpy(new_key, key, sizeof(*key));
1897 sfid->unmasked_key = new_key;
1898
1899 return 0;
1900}
1901
1902u32 ovs_nla_get_ufid_flags(const struct nlattr *attr)
1903{
1904 return nla_get_u32_default(attr, 0);
1905}
1906
1907/**
1908 * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key.
1909 * @net: Network namespace.
1910 * @key: Receives extracted in_port, priority, tun_key, skb_mark and conntrack
1911 * metadata.
1912 * @a: Array of netlink attributes holding parsed %OVS_KEY_ATTR_* Netlink
1913 * attributes.
1914 * @attrs: Bit mask for the netlink attributes included in @a.
1915 * @log: Boolean to allow kernel error logging. Normally true, but when
1916 * probing for feature compatibility this should be passed in as false to
1917 * suppress unnecessary error logging.
1918 *
1919 * This parses a series of Netlink attributes that form a flow key, which must
1920 * take the same form accepted by flow_from_nlattrs(), but only enough of it to
1921 * get the metadata, that is, the parts of the flow key that cannot be
1922 * extracted from the packet itself.
1923 *
1924 * This must be called before the packet key fields are filled in 'key'.
1925 */
1926
1927int ovs_nla_get_flow_metadata(struct net *net,
1928 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1],
1929 u64 attrs, struct sw_flow_key *key, bool log)
1930{
1931 struct sw_flow_match match;
1932
1933 memset(&match, 0, sizeof(match));
1934 match.key = key;
1935
1936 key->ct_state = 0;
1937 key->ct_zone = 0;
1938 key->ct_orig_proto = 0;
1939 memset(&key->ct, 0, sizeof(key->ct));
1940 memset(&key->ipv4.ct_orig, 0, sizeof(key->ipv4.ct_orig));
1941 memset(&key->ipv6.ct_orig, 0, sizeof(key->ipv6.ct_orig));
1942
1943 key->phy.in_port = DP_MAX_PORTS;
1944
1945 return metadata_from_nlattrs(net, &match, &attrs, a, false, log);
1946}
1947
1948static int ovs_nla_put_vlan(struct sk_buff *skb, const struct vlan_head *vh,
1949 bool is_mask)
1950{
1951 __be16 eth_type = !is_mask ? vh->tpid : htons(0xffff);
1952
1953 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) ||
1954 nla_put_be16(skb, OVS_KEY_ATTR_VLAN, vh->tci))
1955 return -EMSGSIZE;
1956 return 0;
1957}
1958
1959static int nsh_key_to_nlattr(const struct ovs_key_nsh *nsh, bool is_mask,
1960 struct sk_buff *skb)
1961{
1962 struct nlattr *start;
1963
1964 start = nla_nest_start_noflag(skb, OVS_KEY_ATTR_NSH);
1965 if (!start)
1966 return -EMSGSIZE;
1967
1968 if (nla_put(skb, OVS_NSH_KEY_ATTR_BASE, sizeof(nsh->base), &nsh->base))
1969 goto nla_put_failure;
1970
1971 if (is_mask || nsh->base.mdtype == NSH_M_TYPE1) {
1972 if (nla_put(skb, OVS_NSH_KEY_ATTR_MD1,
1973 sizeof(nsh->context), nsh->context))
1974 goto nla_put_failure;
1975 }
1976
1977 /* Don't support MD type 2 yet */
1978
1979 nla_nest_end(skb, start);
1980
1981 return 0;
1982
1983nla_put_failure:
1984 return -EMSGSIZE;
1985}
1986
1987static int __ovs_nla_put_key(const struct sw_flow_key *swkey,
1988 const struct sw_flow_key *output, bool is_mask,
1989 struct sk_buff *skb)
1990{
1991 struct ovs_key_ethernet *eth_key;
1992 struct nlattr *nla;
1993 struct nlattr *encap = NULL;
1994 struct nlattr *in_encap = NULL;
1995
1996 if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id))
1997 goto nla_put_failure;
1998
1999 if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash))
2000 goto nla_put_failure;
2001
2002 if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority))
2003 goto nla_put_failure;
2004
2005 if ((swkey->tun_proto || is_mask)) {
2006 const void *opts = NULL;
2007
2008 if (ip_tunnel_is_options_present(output->tun_key.tun_flags))
2009 opts = TUN_METADATA_OPTS(output, swkey->tun_opts_len);
2010
2011 if (ip_tun_to_nlattr(skb, &output->tun_key, opts,
2012 swkey->tun_opts_len, swkey->tun_proto, 0))
2013 goto nla_put_failure;
2014 }
2015
2016 if (swkey->phy.in_port == DP_MAX_PORTS) {
2017 if (is_mask && (output->phy.in_port == 0xffff))
2018 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff))
2019 goto nla_put_failure;
2020 } else {
2021 u16 upper_u16;
2022 upper_u16 = !is_mask ? 0 : 0xffff;
2023
2024 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT,
2025 (upper_u16 << 16) | output->phy.in_port))
2026 goto nla_put_failure;
2027 }
2028
2029 if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark))
2030 goto nla_put_failure;
2031
2032 if (ovs_ct_put_key(swkey, output, skb))
2033 goto nla_put_failure;
2034
2035 if (ovs_key_mac_proto(swkey) == MAC_PROTO_ETHERNET) {
2036 nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key));
2037 if (!nla)
2038 goto nla_put_failure;
2039
2040 eth_key = nla_data(nla);
2041 ether_addr_copy(eth_key->eth_src, output->eth.src);
2042 ether_addr_copy(eth_key->eth_dst, output->eth.dst);
2043
2044 if (swkey->eth.vlan.tci || eth_type_vlan(swkey->eth.type)) {
2045 if (ovs_nla_put_vlan(skb, &output->eth.vlan, is_mask))
2046 goto nla_put_failure;
2047 encap = nla_nest_start_noflag(skb, OVS_KEY_ATTR_ENCAP);
2048 if (!swkey->eth.vlan.tci)
2049 goto unencap;
2050
2051 if (swkey->eth.cvlan.tci || eth_type_vlan(swkey->eth.type)) {
2052 if (ovs_nla_put_vlan(skb, &output->eth.cvlan, is_mask))
2053 goto nla_put_failure;
2054 in_encap = nla_nest_start_noflag(skb,
2055 OVS_KEY_ATTR_ENCAP);
2056 if (!swkey->eth.cvlan.tci)
2057 goto unencap;
2058 }
2059 }
2060
2061 if (swkey->eth.type == htons(ETH_P_802_2)) {
2062 /*
2063 * Ethertype 802.2 is represented in the netlink with omitted
2064 * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and
2065 * 0xffff in the mask attribute. Ethertype can also
2066 * be wildcarded.
2067 */
2068 if (is_mask && output->eth.type)
2069 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE,
2070 output->eth.type))
2071 goto nla_put_failure;
2072 goto unencap;
2073 }
2074 }
2075
2076 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type))
2077 goto nla_put_failure;
2078
2079 if (eth_type_vlan(swkey->eth.type)) {
2080 /* There are 3 VLAN tags, we don't know anything about the rest
2081 * of the packet, so truncate here.
2082 */
2083 WARN_ON_ONCE(!(encap && in_encap));
2084 goto unencap;
2085 }
2086
2087 if (swkey->eth.type == htons(ETH_P_IP)) {
2088 struct ovs_key_ipv4 *ipv4_key;
2089
2090 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key));
2091 if (!nla)
2092 goto nla_put_failure;
2093 ipv4_key = nla_data(nla);
2094 ipv4_key->ipv4_src = output->ipv4.addr.src;
2095 ipv4_key->ipv4_dst = output->ipv4.addr.dst;
2096 ipv4_key->ipv4_proto = output->ip.proto;
2097 ipv4_key->ipv4_tos = output->ip.tos;
2098 ipv4_key->ipv4_ttl = output->ip.ttl;
2099 ipv4_key->ipv4_frag = output->ip.frag;
2100 } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
2101 struct ovs_key_ipv6 *ipv6_key;
2102 struct ovs_key_ipv6_exthdrs *ipv6_exthdrs_key;
2103
2104 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key));
2105 if (!nla)
2106 goto nla_put_failure;
2107 ipv6_key = nla_data(nla);
2108 memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src,
2109 sizeof(ipv6_key->ipv6_src));
2110 memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst,
2111 sizeof(ipv6_key->ipv6_dst));
2112 ipv6_key->ipv6_label = output->ipv6.label;
2113 ipv6_key->ipv6_proto = output->ip.proto;
2114 ipv6_key->ipv6_tclass = output->ip.tos;
2115 ipv6_key->ipv6_hlimit = output->ip.ttl;
2116 ipv6_key->ipv6_frag = output->ip.frag;
2117
2118 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6_EXTHDRS,
2119 sizeof(*ipv6_exthdrs_key));
2120 if (!nla)
2121 goto nla_put_failure;
2122 ipv6_exthdrs_key = nla_data(nla);
2123 ipv6_exthdrs_key->hdrs = output->ipv6.exthdrs;
2124 } else if (swkey->eth.type == htons(ETH_P_NSH)) {
2125 if (nsh_key_to_nlattr(&output->nsh, is_mask, skb))
2126 goto nla_put_failure;
2127 } else if (swkey->eth.type == htons(ETH_P_ARP) ||
2128 swkey->eth.type == htons(ETH_P_RARP)) {
2129 struct ovs_key_arp *arp_key;
2130
2131 nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key));
2132 if (!nla)
2133 goto nla_put_failure;
2134 arp_key = nla_data(nla);
2135 memset(arp_key, 0, sizeof(struct ovs_key_arp));
2136 arp_key->arp_sip = output->ipv4.addr.src;
2137 arp_key->arp_tip = output->ipv4.addr.dst;
2138 arp_key->arp_op = htons(output->ip.proto);
2139 ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha);
2140 ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha);
2141 } else if (eth_p_mpls(swkey->eth.type)) {
2142 u8 i, num_labels;
2143 struct ovs_key_mpls *mpls_key;
2144
2145 num_labels = hweight_long(output->mpls.num_labels_mask);
2146 nla = nla_reserve(skb, OVS_KEY_ATTR_MPLS,
2147 num_labels * sizeof(*mpls_key));
2148 if (!nla)
2149 goto nla_put_failure;
2150
2151 mpls_key = nla_data(nla);
2152 for (i = 0; i < num_labels; i++)
2153 mpls_key[i].mpls_lse = output->mpls.lse[i];
2154 }
2155
2156 if ((swkey->eth.type == htons(ETH_P_IP) ||
2157 swkey->eth.type == htons(ETH_P_IPV6)) &&
2158 swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
2159
2160 if (swkey->ip.proto == IPPROTO_TCP) {
2161 struct ovs_key_tcp *tcp_key;
2162
2163 nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key));
2164 if (!nla)
2165 goto nla_put_failure;
2166 tcp_key = nla_data(nla);
2167 tcp_key->tcp_src = output->tp.src;
2168 tcp_key->tcp_dst = output->tp.dst;
2169 if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS,
2170 output->tp.flags))
2171 goto nla_put_failure;
2172 } else if (swkey->ip.proto == IPPROTO_UDP) {
2173 struct ovs_key_udp *udp_key;
2174
2175 nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key));
2176 if (!nla)
2177 goto nla_put_failure;
2178 udp_key = nla_data(nla);
2179 udp_key->udp_src = output->tp.src;
2180 udp_key->udp_dst = output->tp.dst;
2181 } else if (swkey->ip.proto == IPPROTO_SCTP) {
2182 struct ovs_key_sctp *sctp_key;
2183
2184 nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key));
2185 if (!nla)
2186 goto nla_put_failure;
2187 sctp_key = nla_data(nla);
2188 sctp_key->sctp_src = output->tp.src;
2189 sctp_key->sctp_dst = output->tp.dst;
2190 } else if (swkey->eth.type == htons(ETH_P_IP) &&
2191 swkey->ip.proto == IPPROTO_ICMP) {
2192 struct ovs_key_icmp *icmp_key;
2193
2194 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key));
2195 if (!nla)
2196 goto nla_put_failure;
2197 icmp_key = nla_data(nla);
2198 icmp_key->icmp_type = ntohs(output->tp.src);
2199 icmp_key->icmp_code = ntohs(output->tp.dst);
2200 } else if (swkey->eth.type == htons(ETH_P_IPV6) &&
2201 swkey->ip.proto == IPPROTO_ICMPV6) {
2202 struct ovs_key_icmpv6 *icmpv6_key;
2203
2204 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6,
2205 sizeof(*icmpv6_key));
2206 if (!nla)
2207 goto nla_put_failure;
2208 icmpv6_key = nla_data(nla);
2209 icmpv6_key->icmpv6_type = ntohs(output->tp.src);
2210 icmpv6_key->icmpv6_code = ntohs(output->tp.dst);
2211
2212 if (swkey->tp.src == htons(NDISC_NEIGHBOUR_SOLICITATION) ||
2213 swkey->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) {
2214 struct ovs_key_nd *nd_key;
2215
2216 nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key));
2217 if (!nla)
2218 goto nla_put_failure;
2219 nd_key = nla_data(nla);
2220 memcpy(nd_key->nd_target, &output->ipv6.nd.target,
2221 sizeof(nd_key->nd_target));
2222 ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll);
2223 ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll);
2224 }
2225 }
2226 }
2227
2228unencap:
2229 if (in_encap)
2230 nla_nest_end(skb, in_encap);
2231 if (encap)
2232 nla_nest_end(skb, encap);
2233
2234 return 0;
2235
2236nla_put_failure:
2237 return -EMSGSIZE;
2238}
2239
2240int ovs_nla_put_key(const struct sw_flow_key *swkey,
2241 const struct sw_flow_key *output, int attr, bool is_mask,
2242 struct sk_buff *skb)
2243{
2244 int err;
2245 struct nlattr *nla;
2246
2247 nla = nla_nest_start_noflag(skb, attr);
2248 if (!nla)
2249 return -EMSGSIZE;
2250 err = __ovs_nla_put_key(swkey, output, is_mask, skb);
2251 if (err)
2252 return err;
2253 nla_nest_end(skb, nla);
2254
2255 return 0;
2256}
2257
2258/* Called with ovs_mutex or RCU read lock. */
2259int ovs_nla_put_identifier(const struct sw_flow *flow, struct sk_buff *skb)
2260{
2261 if (ovs_identifier_is_ufid(&flow->id))
2262 return nla_put(skb, OVS_FLOW_ATTR_UFID, flow->id.ufid_len,
2263 flow->id.ufid);
2264
2265 return ovs_nla_put_key(flow->id.unmasked_key, flow->id.unmasked_key,
2266 OVS_FLOW_ATTR_KEY, false, skb);
2267}
2268
2269/* Called with ovs_mutex or RCU read lock. */
2270int ovs_nla_put_masked_key(const struct sw_flow *flow, struct sk_buff *skb)
2271{
2272 return ovs_nla_put_key(&flow->key, &flow->key,
2273 OVS_FLOW_ATTR_KEY, false, skb);
2274}
2275
2276/* Called with ovs_mutex or RCU read lock. */
2277int ovs_nla_put_mask(const struct sw_flow *flow, struct sk_buff *skb)
2278{
2279 return ovs_nla_put_key(&flow->key, &flow->mask->key,
2280 OVS_FLOW_ATTR_MASK, true, skb);
2281}
2282
2283static struct sw_flow_actions *nla_alloc_flow_actions(int size)
2284{
2285 struct sw_flow_actions *sfa;
2286
2287 sfa = kmalloc(kmalloc_size_roundup(sizeof(*sfa) + size), GFP_KERNEL);
2288 if (!sfa)
2289 return ERR_PTR(-ENOMEM);
2290
2291 sfa->actions_len = 0;
2292 return sfa;
2293}
2294
2295static void ovs_nla_free_nested_actions(const struct nlattr *actions, int len);
2296
2297static void ovs_nla_free_check_pkt_len_action(const struct nlattr *action)
2298{
2299 const struct nlattr *a;
2300 int rem;
2301
2302 nla_for_each_nested(a, action, rem) {
2303 switch (nla_type(a)) {
2304 case OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL:
2305 case OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER:
2306 ovs_nla_free_nested_actions(nla_data(a), nla_len(a));
2307 break;
2308 }
2309 }
2310}
2311
2312static void ovs_nla_free_clone_action(const struct nlattr *action)
2313{
2314 const struct nlattr *a = nla_data(action);
2315 int rem = nla_len(action);
2316
2317 switch (nla_type(a)) {
2318 case OVS_CLONE_ATTR_EXEC:
2319 /* The real list of actions follows this attribute. */
2320 a = nla_next(a, &rem);
2321 ovs_nla_free_nested_actions(a, rem);
2322 break;
2323 }
2324}
2325
2326static void ovs_nla_free_dec_ttl_action(const struct nlattr *action)
2327{
2328 const struct nlattr *a = nla_data(action);
2329
2330 switch (nla_type(a)) {
2331 case OVS_DEC_TTL_ATTR_ACTION:
2332 ovs_nla_free_nested_actions(nla_data(a), nla_len(a));
2333 break;
2334 }
2335}
2336
2337static void ovs_nla_free_sample_action(const struct nlattr *action)
2338{
2339 const struct nlattr *a = nla_data(action);
2340 int rem = nla_len(action);
2341
2342 switch (nla_type(a)) {
2343 case OVS_SAMPLE_ATTR_ARG:
2344 /* The real list of actions follows this attribute. */
2345 a = nla_next(a, &rem);
2346 ovs_nla_free_nested_actions(a, rem);
2347 break;
2348 }
2349}
2350
2351static void ovs_nla_free_set_action(const struct nlattr *a)
2352{
2353 const struct nlattr *ovs_key = nla_data(a);
2354 struct ovs_tunnel_info *ovs_tun;
2355
2356 switch (nla_type(ovs_key)) {
2357 case OVS_KEY_ATTR_TUNNEL_INFO:
2358 ovs_tun = nla_data(ovs_key);
2359 dst_release((struct dst_entry *)ovs_tun->tun_dst);
2360 break;
2361 }
2362}
2363
2364static void ovs_nla_free_nested_actions(const struct nlattr *actions, int len)
2365{
2366 const struct nlattr *a;
2367 int rem;
2368
2369 /* Whenever new actions are added, the need to update this
2370 * function should be considered.
2371 */
2372 BUILD_BUG_ON(OVS_ACTION_ATTR_MAX != 25);
2373
2374 if (!actions)
2375 return;
2376
2377 nla_for_each_attr(a, actions, len, rem) {
2378 switch (nla_type(a)) {
2379 case OVS_ACTION_ATTR_CHECK_PKT_LEN:
2380 ovs_nla_free_check_pkt_len_action(a);
2381 break;
2382
2383 case OVS_ACTION_ATTR_CLONE:
2384 ovs_nla_free_clone_action(a);
2385 break;
2386
2387 case OVS_ACTION_ATTR_CT:
2388 ovs_ct_free_action(a);
2389 break;
2390
2391 case OVS_ACTION_ATTR_DEC_TTL:
2392 ovs_nla_free_dec_ttl_action(a);
2393 break;
2394
2395 case OVS_ACTION_ATTR_SAMPLE:
2396 ovs_nla_free_sample_action(a);
2397 break;
2398
2399 case OVS_ACTION_ATTR_SET:
2400 ovs_nla_free_set_action(a);
2401 break;
2402 }
2403 }
2404}
2405
2406void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts)
2407{
2408 if (!sf_acts)
2409 return;
2410
2411 ovs_nla_free_nested_actions(sf_acts->actions, sf_acts->actions_len);
2412 kfree(sf_acts);
2413}
2414
2415static void __ovs_nla_free_flow_actions(struct rcu_head *head)
2416{
2417 ovs_nla_free_flow_actions(container_of(head, struct sw_flow_actions, rcu));
2418}
2419
2420/* Schedules 'sf_acts' to be freed after the next RCU grace period.
2421 * The caller must hold rcu_read_lock for this to be sensible. */
2422void ovs_nla_free_flow_actions_rcu(struct sw_flow_actions *sf_acts)
2423{
2424 call_rcu(&sf_acts->rcu, __ovs_nla_free_flow_actions);
2425}
2426
2427static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa,
2428 int attr_len, bool log)
2429{
2430
2431 struct sw_flow_actions *acts;
2432 int new_acts_size;
2433 size_t req_size = NLA_ALIGN(attr_len);
2434 int next_offset = offsetof(struct sw_flow_actions, actions) +
2435 (*sfa)->actions_len;
2436
2437 if (req_size <= (ksize(*sfa) - next_offset))
2438 goto out;
2439
2440 new_acts_size = max(next_offset + req_size, ksize(*sfa) * 2);
2441
2442 acts = nla_alloc_flow_actions(new_acts_size);
2443 if (IS_ERR(acts))
2444 return ERR_CAST(acts);
2445
2446 memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len);
2447 acts->actions_len = (*sfa)->actions_len;
2448 acts->orig_len = (*sfa)->orig_len;
2449 kfree(*sfa);
2450 *sfa = acts;
2451
2452out:
2453 (*sfa)->actions_len += req_size;
2454 return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset);
2455}
2456
2457static struct nlattr *__add_action(struct sw_flow_actions **sfa,
2458 int attrtype, void *data, int len, bool log)
2459{
2460 struct nlattr *a;
2461
2462 a = reserve_sfa_size(sfa, nla_attr_size(len), log);
2463 if (IS_ERR(a))
2464 return a;
2465
2466 a->nla_type = attrtype;
2467 a->nla_len = nla_attr_size(len);
2468
2469 if (data)
2470 memcpy(nla_data(a), data, len);
2471 memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len));
2472
2473 return a;
2474}
2475
2476int ovs_nla_add_action(struct sw_flow_actions **sfa, int attrtype, void *data,
2477 int len, bool log)
2478{
2479 struct nlattr *a;
2480
2481 a = __add_action(sfa, attrtype, data, len, log);
2482
2483 return PTR_ERR_OR_ZERO(a);
2484}
2485
2486static inline int add_nested_action_start(struct sw_flow_actions **sfa,
2487 int attrtype, bool log)
2488{
2489 int used = (*sfa)->actions_len;
2490 int err;
2491
2492 err = ovs_nla_add_action(sfa, attrtype, NULL, 0, log);
2493 if (err)
2494 return err;
2495
2496 return used;
2497}
2498
2499static inline int add_nested_action_end(struct sw_flow_actions *sfa,
2500 int st_offset)
2501{
2502 struct nlattr *a;
2503 u32 attr_len;
2504
2505 if (WARN_ON_ONCE(st_offset < 0 ||
2506 (u32)st_offset > sfa->actions_len))
2507 return -EINVAL;
2508
2509 attr_len = sfa->actions_len - (u32)st_offset;
2510 if (WARN_ON_ONCE(attr_len < NLA_HDRLEN))
2511 return -EINVAL;
2512
2513 if (attr_len > U16_MAX)
2514 return -EMSGSIZE;
2515
2516 a = (struct nlattr *)((u8 *)sfa->actions + st_offset);
2517 a->nla_len = attr_len;
2518 return 0;
2519}
2520
2521/* Free the generated action-list tail at @start and truncate it.
2522 * If @nested, @start points to its containing nlattr header.
2523 */
2524static void ovs_nla_trim(struct sw_flow_actions *sfa, int start, bool nested)
2525{
2526 const struct nlattr *actions;
2527 u32 len;
2528
2529 if (start < 0)
2530 return;
2531
2532 if (WARN_ON_ONCE((u32)start > sfa->actions_len))
2533 return;
2534
2535 actions = (const struct nlattr *)((u8 *)sfa->actions + start);
2536 len = sfa->actions_len - (u32)start;
2537
2538 if (nested) {
2539 if (len < NLA_HDRLEN)
2540 goto out;
2541
2542 actions = (const struct nlattr *)((u8 *)actions + NLA_HDRLEN);
2543 len -= NLA_HDRLEN;
2544 }
2545
2546 ovs_nla_free_nested_actions(actions, len);
2547out:
2548 sfa->actions_len = start;
2549}
2550
2551static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
2552 const struct sw_flow_key *key,
2553 struct sw_flow_actions **sfa,
2554 __be16 eth_type, __be16 vlan_tci,
2555 u32 mpls_label_count, bool log,
2556 u32 depth);
2557
2558static int validate_and_copy_sample(struct net *net, const struct nlattr *attr,
2559 const struct sw_flow_key *key,
2560 struct sw_flow_actions **sfa,
2561 __be16 eth_type, __be16 vlan_tci,
2562 u32 mpls_label_count, bool log, bool last,
2563 u32 depth)
2564{
2565 const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];
2566 const struct nlattr *probability, *actions;
2567 const struct nlattr *a;
2568 int actions_start;
2569 int rem, start, err;
2570 struct sample_arg arg;
2571
2572 memset(attrs, 0, sizeof(attrs));
2573 nla_for_each_nested(a, attr, rem) {
2574 int type = nla_type(a);
2575 if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type])
2576 return -EINVAL;
2577 attrs[type] = a;
2578 }
2579 if (rem)
2580 return -EINVAL;
2581
2582 probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY];
2583 if (!probability || nla_len(probability) != sizeof(u32))
2584 return -EINVAL;
2585
2586 actions = attrs[OVS_SAMPLE_ATTR_ACTIONS];
2587 if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN))
2588 return -EINVAL;
2589
2590 /* validation done, copy sample action. */
2591 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE, log);
2592 if (start < 0)
2593 return start;
2594
2595 /* When both skb and flow may be changed, put the sample
2596 * into a deferred fifo. On the other hand, if only skb
2597 * may be modified, the actions can be executed in place.
2598 *
2599 * Do this analysis at the flow installation time.
2600 * Set 'clone_action->exec' to true if the actions can be
2601 * executed without being deferred.
2602 *
2603 * If the sample is the last action, it can always be excuted
2604 * rather than deferred.
2605 */
2606 arg.exec = last || !actions_may_change_flow(actions);
2607 arg.probability = nla_get_u32(probability);
2608
2609 err = ovs_nla_add_action(sfa, OVS_SAMPLE_ATTR_ARG, &arg, sizeof(arg),
2610 log);
2611 if (err)
2612 goto err;
2613
2614 actions_start = (*sfa)->actions_len;
2615 err = __ovs_nla_copy_actions(net, actions, key, sfa,
2616 eth_type, vlan_tci, mpls_label_count, log,
2617 depth + 1);
2618
2619 if (err)
2620 goto err_free;
2621
2622 err = add_nested_action_end(*sfa, start);
2623 if (err)
2624 goto err_free;
2625
2626 return 0;
2627
2628err_free:
2629 ovs_nla_trim(*sfa, actions_start, false);
2630err:
2631 (*sfa)->actions_len = start;
2632 return err;
2633}
2634
2635static int validate_and_copy_dec_ttl(struct net *net,
2636 const struct nlattr *attr,
2637 const struct sw_flow_key *key,
2638 struct sw_flow_actions **sfa,
2639 __be16 eth_type, __be16 vlan_tci,
2640 u32 mpls_label_count, bool log,
2641 u32 depth)
2642{
2643 const struct nlattr *attrs[OVS_DEC_TTL_ATTR_MAX + 1];
2644 int start, action_start, err, rem;
2645 const struct nlattr *a, *actions;
2646
2647 memset(attrs, 0, sizeof(attrs));
2648 nla_for_each_nested(a, attr, rem) {
2649 int type = nla_type(a);
2650
2651 /* Ignore unknown attributes to be future proof. */
2652 if (type > OVS_DEC_TTL_ATTR_MAX)
2653 continue;
2654
2655 if (!type || attrs[type]) {
2656 OVS_NLERR(log, "Duplicate or invalid key (type %d).",
2657 type);
2658 return -EINVAL;
2659 }
2660
2661 attrs[type] = a;
2662 }
2663
2664 if (rem) {
2665 OVS_NLERR(log, "Message has %d unknown bytes.", rem);
2666 return -EINVAL;
2667 }
2668
2669 actions = attrs[OVS_DEC_TTL_ATTR_ACTION];
2670 if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN)) {
2671 OVS_NLERR(log, "Missing valid actions attribute.");
2672 return -EINVAL;
2673 }
2674
2675 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_DEC_TTL, log);
2676 if (start < 0)
2677 return start;
2678
2679 action_start = add_nested_action_start(sfa, OVS_DEC_TTL_ATTR_ACTION, log);
2680 if (action_start < 0) {
2681 err = action_start;
2682 goto err;
2683 }
2684
2685 err = __ovs_nla_copy_actions(net, actions, key, sfa, eth_type,
2686 vlan_tci, mpls_label_count, log,
2687 depth + 1);
2688 if (err)
2689 goto err_free;
2690
2691 err = add_nested_action_end(*sfa, action_start);
2692 if (err)
2693 goto err_free;
2694
2695 err = add_nested_action_end(*sfa, start);
2696 if (err)
2697 goto err_free;
2698 return 0;
2699
2700err_free:
2701 ovs_nla_trim(*sfa, action_start, true);
2702err:
2703 (*sfa)->actions_len = start;
2704 return err;
2705}
2706
2707static int validate_and_copy_clone(struct net *net,
2708 const struct nlattr *attr,
2709 const struct sw_flow_key *key,
2710 struct sw_flow_actions **sfa,
2711 __be16 eth_type, __be16 vlan_tci,
2712 u32 mpls_label_count, bool log, bool last,
2713 u32 depth)
2714{
2715 int actions_start;
2716 int start, err;
2717 u32 exec;
2718
2719 if (nla_len(attr) && nla_len(attr) < NLA_HDRLEN)
2720 return -EINVAL;
2721
2722 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_CLONE, log);
2723 if (start < 0)
2724 return start;
2725
2726 exec = last || !actions_may_change_flow(attr);
2727
2728 err = ovs_nla_add_action(sfa, OVS_CLONE_ATTR_EXEC, &exec,
2729 sizeof(exec), log);
2730 if (err)
2731 goto err;
2732
2733 actions_start = (*sfa)->actions_len;
2734 err = __ovs_nla_copy_actions(net, attr, key, sfa,
2735 eth_type, vlan_tci, mpls_label_count, log,
2736 depth + 1);
2737 if (err)
2738 goto err_free;
2739
2740 err = add_nested_action_end(*sfa, start);
2741 if (err)
2742 goto err_free;
2743
2744 return 0;
2745
2746err_free:
2747 ovs_nla_trim(*sfa, actions_start, false);
2748err:
2749 (*sfa)->actions_len = start;
2750 return err;
2751}
2752
2753void ovs_match_init(struct sw_flow_match *match,
2754 struct sw_flow_key *key,
2755 bool reset_key,
2756 struct sw_flow_mask *mask)
2757{
2758 memset(match, 0, sizeof(*match));
2759 match->key = key;
2760 match->mask = mask;
2761
2762 if (reset_key)
2763 memset(key, 0, sizeof(*key));
2764
2765 if (mask) {
2766 memset(&mask->key, 0, sizeof(mask->key));
2767 mask->range.start = mask->range.end = 0;
2768 }
2769}
2770
2771static int validate_geneve_opts(struct sw_flow_key *key)
2772{
2773 struct geneve_opt *option;
2774 int opts_len = key->tun_opts_len;
2775 bool crit_opt = false;
2776
2777 option = (struct geneve_opt *)TUN_METADATA_OPTS(key, key->tun_opts_len);
2778 while (opts_len > 0) {
2779 int len;
2780
2781 if (opts_len < sizeof(*option))
2782 return -EINVAL;
2783
2784 len = sizeof(*option) + option->length * 4;
2785 if (len > opts_len)
2786 return -EINVAL;
2787
2788 crit_opt |= !!(option->type & GENEVE_CRIT_OPT_TYPE);
2789
2790 option = (struct geneve_opt *)((u8 *)option + len);
2791 opts_len -= len;
2792 }
2793
2794 if (crit_opt)
2795 __set_bit(IP_TUNNEL_CRIT_OPT_BIT, key->tun_key.tun_flags);
2796
2797 return 0;
2798}
2799
2800static int validate_and_copy_set_tun(const struct nlattr *attr,
2801 struct sw_flow_actions **sfa, bool log)
2802{
2803 IP_TUNNEL_DECLARE_FLAGS(dst_opt_type) = { };
2804 struct sw_flow_match match;
2805 struct sw_flow_key key;
2806 struct metadata_dst *tun_dst;
2807 struct ip_tunnel_info *tun_info;
2808 struct ovs_tunnel_info *ovs_tun;
2809 struct nlattr *a;
2810 int err = 0, start, opts_type;
2811
2812 ovs_match_init(&match, &key, true, NULL);
2813 opts_type = ip_tun_from_nlattr(nla_data(attr), &match, false, log);
2814 if (opts_type < 0)
2815 return opts_type;
2816
2817 if (key.tun_opts_len) {
2818 switch (opts_type) {
2819 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
2820 err = validate_geneve_opts(&key);
2821 if (err < 0)
2822 return err;
2823
2824 __set_bit(IP_TUNNEL_GENEVE_OPT_BIT, dst_opt_type);
2825 break;
2826 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
2827 __set_bit(IP_TUNNEL_VXLAN_OPT_BIT, dst_opt_type);
2828 break;
2829 case OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS:
2830 __set_bit(IP_TUNNEL_ERSPAN_OPT_BIT, dst_opt_type);
2831 break;
2832 }
2833 }
2834
2835 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET, log);
2836 if (start < 0)
2837 return start;
2838
2839 tun_dst = metadata_dst_alloc(key.tun_opts_len, METADATA_IP_TUNNEL,
2840 GFP_KERNEL);
2841
2842 if (!tun_dst) {
2843 err = -ENOMEM;
2844 goto err;
2845 }
2846
2847 err = dst_cache_init(&tun_dst->u.tun_info.dst_cache, GFP_KERNEL);
2848 if (err)
2849 goto err_free_tun_dst;
2850
2851 a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL,
2852 sizeof(*ovs_tun), log);
2853 if (IS_ERR(a)) {
2854 err = PTR_ERR(a);
2855 goto err_free_tun_dst;
2856 }
2857
2858 ovs_tun = nla_data(a);
2859 ovs_tun->tun_dst = tun_dst;
2860
2861 tun_info = &tun_dst->u.tun_info;
2862 tun_info->mode = IP_TUNNEL_INFO_TX;
2863 if (key.tun_proto == AF_INET6)
2864 tun_info->mode |= IP_TUNNEL_INFO_IPV6;
2865 else if (key.tun_proto == AF_INET && key.tun_key.u.ipv4.dst == 0)
2866 tun_info->mode |= IP_TUNNEL_INFO_BRIDGE;
2867 tun_info->key = key.tun_key;
2868
2869 /* We need to store the options in the action itself since
2870 * everything else will go away after flow setup. We can append
2871 * it to tun_info and then point there.
2872 */
2873 ip_tunnel_info_opts_set(tun_info,
2874 TUN_METADATA_OPTS(&key, key.tun_opts_len),
2875 key.tun_opts_len, dst_opt_type);
2876 err = add_nested_action_end(*sfa, start);
2877 if (WARN_ON_ONCE(err))
2878 goto err_free_tun_dst;
2879
2880 return 0;
2881
2882err_free_tun_dst:
2883 dst_release((struct dst_entry *)tun_dst);
2884err:
2885 (*sfa)->actions_len = start;
2886 return err;
2887}
2888
2889static bool validate_push_nsh(const struct nlattr *a, bool log)
2890{
2891 struct nlattr *nsh_key = nla_data(a);
2892 struct sw_flow_match match;
2893 struct sw_flow_key key;
2894
2895 /* There must be one and only one NSH header. */
2896 if (!nla_ok(nsh_key, nla_len(a)) ||
2897 nla_total_size(nla_len(nsh_key)) != nla_len(a) ||
2898 nla_type(nsh_key) != OVS_KEY_ATTR_NSH)
2899 return false;
2900
2901 ovs_match_init(&match, &key, true, NULL);
2902 return !nsh_key_put_from_nlattr(nsh_key, &match, false, true, log);
2903}
2904
2905/* Return false if there are any non-masked bits set.
2906 * Mask follows data immediately, before any netlink padding.
2907 */
2908static bool validate_masked(u8 *data, int len)
2909{
2910 u8 *mask = data + len;
2911
2912 while (len--)
2913 if (*data++ & ~*mask++)
2914 return false;
2915
2916 return true;
2917}
2918
2919static int validate_set(const struct nlattr *a,
2920 const struct sw_flow_key *flow_key,
2921 struct sw_flow_actions **sfa, bool *skip_copy,
2922 u8 mac_proto, __be16 eth_type, bool masked, bool log)
2923{
2924 const struct nlattr *ovs_key = nla_data(a);
2925 int key_type = nla_type(ovs_key);
2926 size_t key_len;
2927
2928 /* There can be only one key in a action */
2929 if (!nla_ok(ovs_key, nla_len(a)) ||
2930 nla_total_size(nla_len(ovs_key)) != nla_len(a))
2931 return -EINVAL;
2932
2933 key_len = nla_len(ovs_key);
2934 if (masked)
2935 key_len /= 2;
2936
2937 if (key_type > OVS_KEY_ATTR_MAX ||
2938 !check_attr_len(key_len, ovs_key_lens[key_type].len))
2939 return -EINVAL;
2940
2941 if (masked && !validate_masked(nla_data(ovs_key), key_len))
2942 return -EINVAL;
2943
2944 switch (key_type) {
2945 case OVS_KEY_ATTR_PRIORITY:
2946 case OVS_KEY_ATTR_SKB_MARK:
2947 case OVS_KEY_ATTR_CT_MARK:
2948 case OVS_KEY_ATTR_CT_LABELS:
2949 break;
2950
2951 case OVS_KEY_ATTR_ETHERNET:
2952 if (mac_proto != MAC_PROTO_ETHERNET)
2953 return -EINVAL;
2954 break;
2955
2956 case OVS_KEY_ATTR_TUNNEL: {
2957 int err;
2958
2959 if (masked)
2960 return -EINVAL; /* Masked tunnel set not supported. */
2961
2962 *skip_copy = true;
2963 err = validate_and_copy_set_tun(a, sfa, log);
2964 if (err)
2965 return err;
2966 break;
2967 }
2968 case OVS_KEY_ATTR_IPV4: {
2969 const struct ovs_key_ipv4 *ipv4_key;
2970
2971 if (eth_type != htons(ETH_P_IP))
2972 return -EINVAL;
2973
2974 ipv4_key = nla_data(ovs_key);
2975
2976 if (masked) {
2977 const struct ovs_key_ipv4 *mask = ipv4_key + 1;
2978
2979 /* Non-writeable fields. */
2980 if (mask->ipv4_proto || mask->ipv4_frag)
2981 return -EINVAL;
2982 } else {
2983 if (ipv4_key->ipv4_proto != flow_key->ip.proto)
2984 return -EINVAL;
2985
2986 if (ipv4_key->ipv4_frag != flow_key->ip.frag)
2987 return -EINVAL;
2988 }
2989 break;
2990 }
2991 case OVS_KEY_ATTR_IPV6: {
2992 const struct ovs_key_ipv6 *ipv6_key;
2993
2994 if (eth_type != htons(ETH_P_IPV6))
2995 return -EINVAL;
2996
2997 ipv6_key = nla_data(ovs_key);
2998
2999 if (masked) {
3000 const struct ovs_key_ipv6 *mask = ipv6_key + 1;
3001
3002 /* Non-writeable fields. */
3003 if (mask->ipv6_proto || mask->ipv6_frag)
3004 return -EINVAL;
3005
3006 /* Invalid bits in the flow label mask? */
3007 if (ntohl(mask->ipv6_label) & 0xFFF00000)
3008 return -EINVAL;
3009 } else {
3010 if (ipv6_key->ipv6_proto != flow_key->ip.proto)
3011 return -EINVAL;
3012
3013 if (ipv6_key->ipv6_frag != flow_key->ip.frag)
3014 return -EINVAL;
3015 }
3016 if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000)
3017 return -EINVAL;
3018
3019 break;
3020 }
3021 case OVS_KEY_ATTR_TCP:
3022 if ((eth_type != htons(ETH_P_IP) &&
3023 eth_type != htons(ETH_P_IPV6)) ||
3024 flow_key->ip.proto != IPPROTO_TCP)
3025 return -EINVAL;
3026
3027 break;
3028
3029 case OVS_KEY_ATTR_UDP:
3030 if ((eth_type != htons(ETH_P_IP) &&
3031 eth_type != htons(ETH_P_IPV6)) ||
3032 flow_key->ip.proto != IPPROTO_UDP)
3033 return -EINVAL;
3034
3035 break;
3036
3037 case OVS_KEY_ATTR_MPLS:
3038 if (!eth_p_mpls(eth_type))
3039 return -EINVAL;
3040 if (key_len != sizeof(struct ovs_key_mpls))
3041 return -EINVAL;
3042 break;
3043
3044 case OVS_KEY_ATTR_SCTP:
3045 if ((eth_type != htons(ETH_P_IP) &&
3046 eth_type != htons(ETH_P_IPV6)) ||
3047 flow_key->ip.proto != IPPROTO_SCTP)
3048 return -EINVAL;
3049
3050 break;
3051
3052 default:
3053 return -EINVAL;
3054 }
3055
3056 /* Convert non-masked non-tunnel set actions to masked set actions. */
3057 if (!masked && key_type != OVS_KEY_ATTR_TUNNEL) {
3058 int err, start, len = key_len * 2;
3059 struct nlattr *at;
3060
3061 *skip_copy = true;
3062
3063 start = add_nested_action_start(sfa,
3064 OVS_ACTION_ATTR_SET_TO_MASKED,
3065 log);
3066 if (start < 0)
3067 return start;
3068
3069 at = __add_action(sfa, key_type, NULL, len, log);
3070 if (IS_ERR(at)) {
3071 err = PTR_ERR(at);
3072 (*sfa)->actions_len = start;
3073 return err;
3074 }
3075
3076 memcpy(nla_data(at), nla_data(ovs_key), key_len); /* Key. */
3077 memset(nla_data(at) + key_len, 0xff, key_len); /* Mask. */
3078 /* Clear non-writeable bits from otherwise writeable fields. */
3079 if (key_type == OVS_KEY_ATTR_IPV6) {
3080 struct ovs_key_ipv6 *mask = nla_data(at) + key_len;
3081
3082 mask->ipv6_label &= htonl(0x000FFFFF);
3083 }
3084 err = add_nested_action_end(*sfa, start);
3085 if (WARN_ON_ONCE(err)) {
3086 (*sfa)->actions_len = start;
3087 return err;
3088 }
3089 }
3090
3091 return 0;
3092}
3093
3094static int validate_userspace(const struct nlattr *attr)
3095{
3096 static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = {
3097 [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 },
3098 [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC },
3099 [OVS_USERSPACE_ATTR_EGRESS_TUN_PORT] = {.type = NLA_U32 },
3100 };
3101 struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];
3102 int error;
3103
3104 error = nla_parse_deprecated_strict(a, OVS_USERSPACE_ATTR_MAX,
3105 nla_data(attr), nla_len(attr),
3106 userspace_policy, NULL);
3107 if (error)
3108 return error;
3109
3110 if (!a[OVS_USERSPACE_ATTR_PID] ||
3111 !nla_get_u32(a[OVS_USERSPACE_ATTR_PID]))
3112 return -EINVAL;
3113
3114 return 0;
3115}
3116
3117static const struct nla_policy cpl_policy[OVS_CHECK_PKT_LEN_ATTR_MAX + 1] = {
3118 [OVS_CHECK_PKT_LEN_ATTR_PKT_LEN] = {.type = NLA_U16 },
3119 [OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER] = {.type = NLA_NESTED },
3120 [OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL] = {.type = NLA_NESTED },
3121};
3122
3123static int validate_and_copy_check_pkt_len(struct net *net,
3124 const struct nlattr *attr,
3125 const struct sw_flow_key *key,
3126 struct sw_flow_actions **sfa,
3127 __be16 eth_type, __be16 vlan_tci,
3128 u32 mpls_label_count,
3129 bool log, bool last, u32 depth)
3130{
3131 const struct nlattr *acts_if_greater, *acts_if_lesser_eq;
3132 struct nlattr *a[OVS_CHECK_PKT_LEN_ATTR_MAX + 1];
3133 struct check_pkt_len_arg arg;
3134 int greater_acts_start = -1;
3135 int lesser_acts_start = -1;
3136 int start, err;
3137
3138 err = nla_parse_deprecated_strict(a, OVS_CHECK_PKT_LEN_ATTR_MAX,
3139 nla_data(attr), nla_len(attr),
3140 cpl_policy, NULL);
3141 if (err)
3142 return err;
3143
3144 if (!a[OVS_CHECK_PKT_LEN_ATTR_PKT_LEN] ||
3145 !nla_get_u16(a[OVS_CHECK_PKT_LEN_ATTR_PKT_LEN]))
3146 return -EINVAL;
3147
3148 acts_if_lesser_eq = a[OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL];
3149 acts_if_greater = a[OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER];
3150
3151 /* Both the nested action should be present. */
3152 if (!acts_if_greater || !acts_if_lesser_eq)
3153 return -EINVAL;
3154
3155 /* validation done, copy the nested actions. */
3156 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_CHECK_PKT_LEN,
3157 log);
3158 if (start < 0)
3159 return start;
3160
3161 arg.pkt_len = nla_get_u16(a[OVS_CHECK_PKT_LEN_ATTR_PKT_LEN]);
3162 arg.exec_for_lesser_equal =
3163 last || !actions_may_change_flow(acts_if_lesser_eq);
3164 arg.exec_for_greater =
3165 last || !actions_may_change_flow(acts_if_greater);
3166
3167 err = ovs_nla_add_action(sfa, OVS_CHECK_PKT_LEN_ATTR_ARG, &arg,
3168 sizeof(arg), log);
3169 if (err)
3170 goto err_free;
3171
3172 lesser_acts_start =
3173 add_nested_action_start(sfa,
3174 OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL,
3175 log);
3176 if (lesser_acts_start < 0) {
3177 err = lesser_acts_start;
3178 goto err_free;
3179 }
3180
3181 err = __ovs_nla_copy_actions(net, acts_if_lesser_eq, key, sfa,
3182 eth_type, vlan_tci, mpls_label_count, log,
3183 depth + 1);
3184
3185 if (err)
3186 goto err_free;
3187
3188 err = add_nested_action_end(*sfa, lesser_acts_start);
3189 if (err)
3190 goto err_free;
3191
3192 greater_acts_start =
3193 add_nested_action_start(sfa,
3194 OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER,
3195 log);
3196 if (greater_acts_start < 0) {
3197 err = greater_acts_start;
3198 goto err_free;
3199 }
3200
3201 err = __ovs_nla_copy_actions(net, acts_if_greater, key, sfa,
3202 eth_type, vlan_tci, mpls_label_count, log,
3203 depth + 1);
3204
3205 if (err)
3206 goto err_free;
3207
3208 err = add_nested_action_end(*sfa, greater_acts_start);
3209 if (err)
3210 goto err_free;
3211
3212 err = add_nested_action_end(*sfa, start);
3213 if (err)
3214 goto err_free;
3215 return 0;
3216
3217err_free:
3218 ovs_nla_trim(*sfa, greater_acts_start, true);
3219 ovs_nla_trim(*sfa, lesser_acts_start, true);
3220 ovs_nla_trim(*sfa, start, false);
3221 return err;
3222}
3223
3224static int validate_psample(const struct nlattr *attr)
3225{
3226 static const struct nla_policy policy[OVS_PSAMPLE_ATTR_MAX + 1] = {
3227 [OVS_PSAMPLE_ATTR_GROUP] = { .type = NLA_U32 },
3228 [OVS_PSAMPLE_ATTR_COOKIE] = {
3229 .type = NLA_BINARY,
3230 .len = OVS_PSAMPLE_COOKIE_MAX_SIZE,
3231 },
3232 };
3233 struct nlattr *a[OVS_PSAMPLE_ATTR_MAX + 1];
3234 int err;
3235
3236 if (!IS_ENABLED(CONFIG_PSAMPLE))
3237 return -EOPNOTSUPP;
3238
3239 err = nla_parse_nested(a, OVS_PSAMPLE_ATTR_MAX, attr, policy, NULL);
3240 if (err)
3241 return err;
3242
3243 return a[OVS_PSAMPLE_ATTR_GROUP] ? 0 : -EINVAL;
3244}
3245
3246static int copy_action(const struct nlattr *from,
3247 struct sw_flow_actions **sfa, bool log)
3248{
3249 int totlen = NLA_ALIGN(from->nla_len);
3250 struct nlattr *to;
3251
3252 to = reserve_sfa_size(sfa, from->nla_len, log);
3253 if (IS_ERR(to))
3254 return PTR_ERR(to);
3255
3256 memcpy(to, from, totlen);
3257 return 0;
3258}
3259
3260static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
3261 const struct sw_flow_key *key,
3262 struct sw_flow_actions **sfa,
3263 __be16 eth_type, __be16 vlan_tci,
3264 u32 mpls_label_count, bool log,
3265 u32 depth)
3266{
3267 u8 mac_proto = ovs_key_mac_proto(key);
3268 const struct nlattr *a;
3269 int rem, err;
3270
3271 if (depth > OVS_COPY_ACTIONS_MAX_DEPTH)
3272 return -EOVERFLOW;
3273
3274 nla_for_each_nested(a, attr, rem) {
3275 /* Expected argument lengths, (u32)-1 for variable length. */
3276 static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {
3277 [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32),
3278 [OVS_ACTION_ATTR_RECIRC] = sizeof(u32),
3279 [OVS_ACTION_ATTR_USERSPACE] = (u32)-1,
3280 [OVS_ACTION_ATTR_PUSH_MPLS] = sizeof(struct ovs_action_push_mpls),
3281 [OVS_ACTION_ATTR_POP_MPLS] = sizeof(__be16),
3282 [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan),
3283 [OVS_ACTION_ATTR_POP_VLAN] = 0,
3284 [OVS_ACTION_ATTR_SET] = (u32)-1,
3285 [OVS_ACTION_ATTR_SET_MASKED] = (u32)-1,
3286 [OVS_ACTION_ATTR_SAMPLE] = (u32)-1,
3287 [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash),
3288 [OVS_ACTION_ATTR_CT] = (u32)-1,
3289 [OVS_ACTION_ATTR_CT_CLEAR] = 0,
3290 [OVS_ACTION_ATTR_TRUNC] = sizeof(struct ovs_action_trunc),
3291 [OVS_ACTION_ATTR_PUSH_ETH] = sizeof(struct ovs_action_push_eth),
3292 [OVS_ACTION_ATTR_POP_ETH] = 0,
3293 [OVS_ACTION_ATTR_PUSH_NSH] = (u32)-1,
3294 [OVS_ACTION_ATTR_POP_NSH] = 0,
3295 [OVS_ACTION_ATTR_METER] = sizeof(u32),
3296 [OVS_ACTION_ATTR_CLONE] = (u32)-1,
3297 [OVS_ACTION_ATTR_CHECK_PKT_LEN] = (u32)-1,
3298 [OVS_ACTION_ATTR_ADD_MPLS] = sizeof(struct ovs_action_add_mpls),
3299 [OVS_ACTION_ATTR_DEC_TTL] = (u32)-1,
3300 [OVS_ACTION_ATTR_DROP] = sizeof(u32),
3301 [OVS_ACTION_ATTR_PSAMPLE] = (u32)-1,
3302 };
3303 const struct ovs_action_push_vlan *vlan;
3304 int type = nla_type(a);
3305 bool skip_copy;
3306
3307 if (type > OVS_ACTION_ATTR_MAX ||
3308 (action_lens[type] != nla_len(a) &&
3309 action_lens[type] != (u32)-1))
3310 return -EINVAL;
3311
3312 skip_copy = false;
3313 switch (type) {
3314 case OVS_ACTION_ATTR_UNSPEC:
3315 return -EINVAL;
3316
3317 case OVS_ACTION_ATTR_USERSPACE:
3318 err = validate_userspace(a);
3319 if (err)
3320 return err;
3321 break;
3322
3323 case OVS_ACTION_ATTR_OUTPUT:
3324 if (nla_get_u32(a) >= DP_MAX_PORTS)
3325 return -EINVAL;
3326 break;
3327
3328 case OVS_ACTION_ATTR_TRUNC: {
3329 const struct ovs_action_trunc *trunc = nla_data(a);
3330
3331 if (trunc->max_len < ETH_HLEN)
3332 return -EINVAL;
3333 break;
3334 }
3335
3336 case OVS_ACTION_ATTR_HASH: {
3337 const struct ovs_action_hash *act_hash = nla_data(a);
3338
3339 switch (act_hash->hash_alg) {
3340 case OVS_HASH_ALG_L4:
3341 fallthrough;
3342 case OVS_HASH_ALG_SYM_L4:
3343 break;
3344 default:
3345 return -EINVAL;
3346 }
3347
3348 break;
3349 }
3350
3351 case OVS_ACTION_ATTR_POP_VLAN:
3352 if (mac_proto != MAC_PROTO_ETHERNET)
3353 return -EINVAL;
3354 vlan_tci = htons(0);
3355 break;
3356
3357 case OVS_ACTION_ATTR_PUSH_VLAN:
3358 if (mac_proto != MAC_PROTO_ETHERNET)
3359 return -EINVAL;
3360 vlan = nla_data(a);
3361 if (!eth_type_vlan(vlan->vlan_tpid))
3362 return -EINVAL;
3363 if (!(vlan->vlan_tci & htons(VLAN_CFI_MASK)))
3364 return -EINVAL;
3365 vlan_tci = vlan->vlan_tci;
3366 break;
3367
3368 case OVS_ACTION_ATTR_RECIRC:
3369 break;
3370
3371 case OVS_ACTION_ATTR_ADD_MPLS: {
3372 const struct ovs_action_add_mpls *mpls = nla_data(a);
3373
3374 if (!eth_p_mpls(mpls->mpls_ethertype))
3375 return -EINVAL;
3376
3377 if (mpls->tun_flags & OVS_MPLS_L3_TUNNEL_FLAG_MASK) {
3378 if (vlan_tci & htons(VLAN_CFI_MASK) ||
3379 (eth_type != htons(ETH_P_IP) &&
3380 eth_type != htons(ETH_P_IPV6) &&
3381 eth_type != htons(ETH_P_ARP) &&
3382 eth_type != htons(ETH_P_RARP) &&
3383 !eth_p_mpls(eth_type)))
3384 return -EINVAL;
3385 mpls_label_count++;
3386 } else {
3387 if (mac_proto == MAC_PROTO_ETHERNET) {
3388 mpls_label_count = 1;
3389 mac_proto = MAC_PROTO_NONE;
3390 } else {
3391 mpls_label_count++;
3392 }
3393 }
3394 eth_type = mpls->mpls_ethertype;
3395 break;
3396 }
3397
3398 case OVS_ACTION_ATTR_PUSH_MPLS: {
3399 const struct ovs_action_push_mpls *mpls = nla_data(a);
3400
3401 if (!eth_p_mpls(mpls->mpls_ethertype))
3402 return -EINVAL;
3403 /* Prohibit push MPLS other than to a white list
3404 * for packets that have a known tag order.
3405 */
3406 if (vlan_tci & htons(VLAN_CFI_MASK) ||
3407 (eth_type != htons(ETH_P_IP) &&
3408 eth_type != htons(ETH_P_IPV6) &&
3409 eth_type != htons(ETH_P_ARP) &&
3410 eth_type != htons(ETH_P_RARP) &&
3411 !eth_p_mpls(eth_type)))
3412 return -EINVAL;
3413 eth_type = mpls->mpls_ethertype;
3414 mpls_label_count++;
3415 break;
3416 }
3417
3418 case OVS_ACTION_ATTR_POP_MPLS: {
3419 __be16 proto;
3420 if (vlan_tci & htons(VLAN_CFI_MASK) ||
3421 !eth_p_mpls(eth_type))
3422 return -EINVAL;
3423
3424 /* Disallow subsequent L2.5+ set actions and mpls_pop
3425 * actions once the last MPLS label in the packet is
3426 * popped as there is no check here to ensure that
3427 * the new eth type is valid and thus set actions could
3428 * write off the end of the packet or otherwise corrupt
3429 * it.
3430 *
3431 * Support for these actions is planned using packet
3432 * recirculation.
3433 */
3434 proto = nla_get_be16(a);
3435
3436 if (proto == htons(ETH_P_TEB) &&
3437 mac_proto != MAC_PROTO_NONE)
3438 return -EINVAL;
3439
3440 mpls_label_count--;
3441
3442 if (!eth_p_mpls(proto) || !mpls_label_count)
3443 eth_type = htons(0);
3444 else
3445 eth_type = proto;
3446
3447 break;
3448 }
3449
3450 case OVS_ACTION_ATTR_SET:
3451 err = validate_set(a, key, sfa,
3452 &skip_copy, mac_proto, eth_type,
3453 false, log);
3454 if (err)
3455 return err;
3456 break;
3457
3458 case OVS_ACTION_ATTR_SET_MASKED:
3459 err = validate_set(a, key, sfa,
3460 &skip_copy, mac_proto, eth_type,
3461 true, log);
3462 if (err)
3463 return err;
3464 break;
3465
3466 case OVS_ACTION_ATTR_SAMPLE: {
3467 bool last = nla_is_last(a, rem);
3468
3469 err = validate_and_copy_sample(net, a, key, sfa,
3470 eth_type, vlan_tci,
3471 mpls_label_count,
3472 log, last, depth);
3473 if (err)
3474 return err;
3475 skip_copy = true;
3476 break;
3477 }
3478
3479 case OVS_ACTION_ATTR_CT:
3480 err = ovs_ct_copy_action(net, a, key, sfa, log);
3481 if (err)
3482 return err;
3483 skip_copy = true;
3484 break;
3485
3486 case OVS_ACTION_ATTR_CT_CLEAR:
3487 break;
3488
3489 case OVS_ACTION_ATTR_PUSH_ETH:
3490 /* Disallow pushing an Ethernet header if one
3491 * is already present */
3492 if (mac_proto != MAC_PROTO_NONE)
3493 return -EINVAL;
3494 mac_proto = MAC_PROTO_ETHERNET;
3495 break;
3496
3497 case OVS_ACTION_ATTR_POP_ETH:
3498 if (mac_proto != MAC_PROTO_ETHERNET)
3499 return -EINVAL;
3500 if (vlan_tci & htons(VLAN_CFI_MASK))
3501 return -EINVAL;
3502 mac_proto = MAC_PROTO_NONE;
3503 break;
3504
3505 case OVS_ACTION_ATTR_PUSH_NSH:
3506 if (mac_proto != MAC_PROTO_ETHERNET) {
3507 u8 next_proto;
3508
3509 next_proto = tun_p_from_eth_p(eth_type);
3510 if (!next_proto)
3511 return -EINVAL;
3512 }
3513 mac_proto = MAC_PROTO_NONE;
3514 if (!validate_push_nsh(a, log))
3515 return -EINVAL;
3516 break;
3517
3518 case OVS_ACTION_ATTR_POP_NSH: {
3519 __be16 inner_proto;
3520
3521 if (eth_type != htons(ETH_P_NSH))
3522 return -EINVAL;
3523 inner_proto = tun_p_to_eth_p(key->nsh.base.np);
3524 if (!inner_proto)
3525 return -EINVAL;
3526 if (key->nsh.base.np == TUN_P_ETHERNET)
3527 mac_proto = MAC_PROTO_ETHERNET;
3528 else
3529 mac_proto = MAC_PROTO_NONE;
3530 break;
3531 }
3532
3533 case OVS_ACTION_ATTR_METER:
3534 /* Non-existent meters are simply ignored. */
3535 break;
3536
3537 case OVS_ACTION_ATTR_CLONE: {
3538 bool last = nla_is_last(a, rem);
3539
3540 err = validate_and_copy_clone(net, a, key, sfa,
3541 eth_type, vlan_tci,
3542 mpls_label_count,
3543 log, last, depth);
3544 if (err)
3545 return err;
3546 skip_copy = true;
3547 break;
3548 }
3549
3550 case OVS_ACTION_ATTR_CHECK_PKT_LEN: {
3551 bool last = nla_is_last(a, rem);
3552
3553 err = validate_and_copy_check_pkt_len(net, a, key, sfa,
3554 eth_type,
3555 vlan_tci,
3556 mpls_label_count,
3557 log, last,
3558 depth);
3559 if (err)
3560 return err;
3561 skip_copy = true;
3562 break;
3563 }
3564
3565 case OVS_ACTION_ATTR_DEC_TTL:
3566 err = validate_and_copy_dec_ttl(net, a, key, sfa,
3567 eth_type, vlan_tci,
3568 mpls_label_count, log,
3569 depth);
3570 if (err)
3571 return err;
3572 skip_copy = true;
3573 break;
3574
3575 case OVS_ACTION_ATTR_DROP:
3576 if (!nla_is_last(a, rem))
3577 return -EINVAL;
3578 break;
3579
3580 case OVS_ACTION_ATTR_PSAMPLE:
3581 err = validate_psample(a);
3582 if (err)
3583 return err;
3584 break;
3585
3586 default:
3587 OVS_NLERR(log, "Unknown Action type %d", type);
3588 return -EINVAL;
3589 }
3590 if (!skip_copy) {
3591 err = copy_action(a, sfa, log);
3592 if (err)
3593 return err;
3594 }
3595 }
3596
3597 if (rem > 0)
3598 return -EINVAL;
3599
3600 return 0;
3601}
3602
3603/* 'key' must be the masked key. */
3604int ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
3605 const struct sw_flow_key *key,
3606 struct sw_flow_actions **sfa, bool log)
3607{
3608 int err;
3609 u32 mpls_label_count = 0;
3610
3611 *sfa = nla_alloc_flow_actions(nla_len(attr));
3612 if (IS_ERR(*sfa))
3613 return PTR_ERR(*sfa);
3614
3615 if (eth_p_mpls(key->eth.type))
3616 mpls_label_count = hweight_long(key->mpls.num_labels_mask);
3617
3618 (*sfa)->orig_len = nla_len(attr);
3619 err = __ovs_nla_copy_actions(net, attr, key, sfa, key->eth.type,
3620 key->eth.vlan.tci, mpls_label_count, log,
3621 0);
3622 if (err)
3623 ovs_nla_free_flow_actions(*sfa);
3624
3625 return err;
3626}
3627
3628static int sample_action_to_attr(const struct nlattr *attr,
3629 struct sk_buff *skb)
3630{
3631 struct nlattr *start, *ac_start = NULL, *sample_arg;
3632 int err = 0, rem = nla_len(attr);
3633 const struct sample_arg *arg;
3634 struct nlattr *actions;
3635
3636 start = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_SAMPLE);
3637 if (!start)
3638 return -EMSGSIZE;
3639
3640 sample_arg = nla_data(attr);
3641 arg = nla_data(sample_arg);
3642 actions = nla_next(sample_arg, &rem);
3643
3644 if (nla_put_u32(skb, OVS_SAMPLE_ATTR_PROBABILITY, arg->probability)) {
3645 err = -EMSGSIZE;
3646 goto out;
3647 }
3648
3649 ac_start = nla_nest_start_noflag(skb, OVS_SAMPLE_ATTR_ACTIONS);
3650 if (!ac_start) {
3651 err = -EMSGSIZE;
3652 goto out;
3653 }
3654
3655 err = ovs_nla_put_actions(actions, rem, skb);
3656
3657out:
3658 if (err) {
3659 nla_nest_cancel(skb, ac_start);
3660 nla_nest_cancel(skb, start);
3661 } else {
3662 nla_nest_end(skb, ac_start);
3663 nla_nest_end(skb, start);
3664 }
3665
3666 return err;
3667}
3668
3669static int clone_action_to_attr(const struct nlattr *attr,
3670 struct sk_buff *skb)
3671{
3672 struct nlattr *start;
3673 int err = 0, rem = nla_len(attr);
3674
3675 start = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_CLONE);
3676 if (!start)
3677 return -EMSGSIZE;
3678
3679 /* Skipping the OVS_CLONE_ATTR_EXEC that is always the first attribute. */
3680 attr = nla_next(nla_data(attr), &rem);
3681 err = ovs_nla_put_actions(attr, rem, skb);
3682
3683 if (err)
3684 nla_nest_cancel(skb, start);
3685 else
3686 nla_nest_end(skb, start);
3687
3688 return err;
3689}
3690
3691static int check_pkt_len_action_to_attr(const struct nlattr *attr,
3692 struct sk_buff *skb)
3693{
3694 struct nlattr *start, *ac_start = NULL;
3695 const struct check_pkt_len_arg *arg;
3696 const struct nlattr *a, *cpl_arg;
3697 int err = 0, rem = nla_len(attr);
3698
3699 start = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_CHECK_PKT_LEN);
3700 if (!start)
3701 return -EMSGSIZE;
3702
3703 /* The first nested attribute in 'attr' is always
3704 * 'OVS_CHECK_PKT_LEN_ATTR_ARG'.
3705 */
3706 cpl_arg = nla_data(attr);
3707 arg = nla_data(cpl_arg);
3708
3709 if (nla_put_u16(skb, OVS_CHECK_PKT_LEN_ATTR_PKT_LEN, arg->pkt_len)) {
3710 err = -EMSGSIZE;
3711 goto out;
3712 }
3713
3714 /* Second nested attribute in 'attr' is always
3715 * 'OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL'.
3716 */
3717 a = nla_next(cpl_arg, &rem);
3718 ac_start = nla_nest_start_noflag(skb,
3719 OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL);
3720 if (!ac_start) {
3721 err = -EMSGSIZE;
3722 goto out;
3723 }
3724
3725 err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb);
3726 if (err) {
3727 nla_nest_cancel(skb, ac_start);
3728 goto out;
3729 } else {
3730 nla_nest_end(skb, ac_start);
3731 }
3732
3733 /* Third nested attribute in 'attr' is always
3734 * OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER.
3735 */
3736 a = nla_next(a, &rem);
3737 ac_start = nla_nest_start_noflag(skb,
3738 OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER);
3739 if (!ac_start) {
3740 err = -EMSGSIZE;
3741 goto out;
3742 }
3743
3744 err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb);
3745 if (err) {
3746 nla_nest_cancel(skb, ac_start);
3747 goto out;
3748 } else {
3749 nla_nest_end(skb, ac_start);
3750 }
3751
3752 nla_nest_end(skb, start);
3753 return 0;
3754
3755out:
3756 nla_nest_cancel(skb, start);
3757 return err;
3758}
3759
3760static int dec_ttl_action_to_attr(const struct nlattr *attr,
3761 struct sk_buff *skb)
3762{
3763 struct nlattr *start, *action_start;
3764 const struct nlattr *a;
3765 int err = 0, rem;
3766
3767 start = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_DEC_TTL);
3768 if (!start)
3769 return -EMSGSIZE;
3770
3771 nla_for_each_attr(a, nla_data(attr), nla_len(attr), rem) {
3772 switch (nla_type(a)) {
3773 case OVS_DEC_TTL_ATTR_ACTION:
3774
3775 action_start = nla_nest_start_noflag(skb, OVS_DEC_TTL_ATTR_ACTION);
3776 if (!action_start) {
3777 err = -EMSGSIZE;
3778 goto out;
3779 }
3780
3781 err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb);
3782 if (err)
3783 goto out;
3784
3785 nla_nest_end(skb, action_start);
3786 break;
3787
3788 default:
3789 /* Ignore all other option to be future compatible */
3790 break;
3791 }
3792 }
3793
3794 nla_nest_end(skb, start);
3795 return 0;
3796
3797out:
3798 nla_nest_cancel(skb, start);
3799 return err;
3800}
3801
3802static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb)
3803{
3804 const struct nlattr *ovs_key = nla_data(a);
3805 int key_type = nla_type(ovs_key);
3806 struct nlattr *start;
3807 int err;
3808
3809 switch (key_type) {
3810 case OVS_KEY_ATTR_TUNNEL_INFO: {
3811 struct ovs_tunnel_info *ovs_tun = nla_data(ovs_key);
3812 struct ip_tunnel_info *tun_info = &ovs_tun->tun_dst->u.tun_info;
3813
3814 start = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_SET);
3815 if (!start)
3816 return -EMSGSIZE;
3817
3818 err = ip_tun_to_nlattr(skb, &tun_info->key,
3819 ip_tunnel_info_opts(tun_info),
3820 tun_info->options_len,
3821 ip_tunnel_info_af(tun_info), tun_info->mode);
3822 if (err)
3823 return err;
3824 nla_nest_end(skb, start);
3825 break;
3826 }
3827 default:
3828 if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key))
3829 return -EMSGSIZE;
3830 break;
3831 }
3832
3833 return 0;
3834}
3835
3836static int masked_set_action_to_set_action_attr(const struct nlattr *a,
3837 struct sk_buff *skb)
3838{
3839 const struct nlattr *ovs_key = nla_data(a);
3840 struct nlattr *nla;
3841 size_t key_len = nla_len(ovs_key) / 2;
3842
3843 /* Revert the conversion we did from a non-masked set action to
3844 * masked set action.
3845 */
3846 nla = nla_nest_start_noflag(skb, OVS_ACTION_ATTR_SET);
3847 if (!nla)
3848 return -EMSGSIZE;
3849
3850 if (nla_put(skb, nla_type(ovs_key), key_len, nla_data(ovs_key)))
3851 return -EMSGSIZE;
3852
3853 nla_nest_end(skb, nla);
3854 return 0;
3855}
3856
3857int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb)
3858{
3859 const struct nlattr *a;
3860 int rem, err;
3861
3862 nla_for_each_attr(a, attr, len, rem) {
3863 int type = nla_type(a);
3864
3865 switch (type) {
3866 case OVS_ACTION_ATTR_SET:
3867 err = set_action_to_attr(a, skb);
3868 if (err)
3869 return err;
3870 break;
3871
3872 case OVS_ACTION_ATTR_SET_TO_MASKED:
3873 err = masked_set_action_to_set_action_attr(a, skb);
3874 if (err)
3875 return err;
3876 break;
3877
3878 case OVS_ACTION_ATTR_SAMPLE:
3879 err = sample_action_to_attr(a, skb);
3880 if (err)
3881 return err;
3882 break;
3883
3884 case OVS_ACTION_ATTR_CT:
3885 err = ovs_ct_action_to_attr(nla_data(a), skb);
3886 if (err)
3887 return err;
3888 break;
3889
3890 case OVS_ACTION_ATTR_CLONE:
3891 err = clone_action_to_attr(a, skb);
3892 if (err)
3893 return err;
3894 break;
3895
3896 case OVS_ACTION_ATTR_CHECK_PKT_LEN:
3897 err = check_pkt_len_action_to_attr(a, skb);
3898 if (err)
3899 return err;
3900 break;
3901
3902 case OVS_ACTION_ATTR_DEC_TTL:
3903 err = dec_ttl_action_to_attr(a, skb);
3904 if (err)
3905 return err;
3906 break;
3907
3908 default:
3909 if (nla_put(skb, type, nla_len(a), nla_data(a)))
3910 return -EMSGSIZE;
3911 break;
3912 }
3913 }
3914
3915 return 0;
3916}