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openvswitch: Add support for Geneve tunneling.
[deliverable/linux.git] / net / openvswitch / flow_netlink.c
CommitLineData
e6445719 1/*
971427f3 2 * Copyright (c) 2007-2014 Nicira, Inc.
e6445719
PS		 3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of version 2 of the GNU General Public
6 * License as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
16 * 02110-1301, USA
17 */
18
2235ad1c
JP		 19#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
20
e6445719
PS		 21#include "flow.h"
22#include "datapath.h"
23#include <linux/uaccess.h>
24#include <linux/netdevice.h>
25#include <linux/etherdevice.h>
26#include <linux/if_ether.h>
27#include <linux/if_vlan.h>
28#include <net/llc_pdu.h>
29#include <linux/kernel.h>
30#include <linux/jhash.h>
31#include <linux/jiffies.h>
32#include <linux/llc.h>
33#include <linux/module.h>
34#include <linux/in.h>
35#include <linux/rcupdate.h>
36#include <linux/if_arp.h>
37#include <linux/ip.h>
38#include <linux/ipv6.h>
39#include <linux/sctp.h>
40#include <linux/tcp.h>
41#include <linux/udp.h>
42#include <linux/icmp.h>
43#include <linux/icmpv6.h>
44#include <linux/rculist.h>
f5796684 45#include <net/geneve.h>
e6445719
PS		 46#include <net/ip.h>
47#include <net/ipv6.h>
48#include <net/ndisc.h>
49
50#include "flow_netlink.h"
51
52static void update_range__(struct sw_flow_match *match,
53 size_t offset, size_t size, bool is_mask)
54{
55 struct sw_flow_key_range *range = NULL;
56 size_t start = rounddown(offset, sizeof(long));
57 size_t end = roundup(offset + size, sizeof(long));
58
59 if (!is_mask)
60 range = &match->range;
61 else if (match->mask)
62 range = &match->mask->range;
63
64 if (!range)
65 return;
66
67 if (range->start == range->end) {
68 range->start = start;
69 range->end = end;
70 return;
71 }
72
73 if (range->start > start)
74 range->start = start;
75
76 if (range->end < end)
77 range->end = end;
78}
79
80#define SW_FLOW_KEY_PUT(match, field, value, is_mask) \
81 do { \
82 update_range__(match, offsetof(struct sw_flow_key, field), \
83 sizeof((match)->key->field), is_mask); \
84 if (is_mask) { \
85 if ((match)->mask) \
86 (match)->mask->key.field = value; \
87 } else { \
88 (match)->key->field = value; \
89 } \
90 } while (0)
91
f5796684
JG		 92#define SW_FLOW_KEY_MEMCPY_OFFSET(match, offset, value_p, len, is_mask) \
93 do { \
94 update_range__(match, offset, len, is_mask); \
95 if (is_mask) \
96 memcpy((u8 *)&(match)->mask->key + offset, value_p, \
97 len); \
98 else \
99 memcpy((u8 *)(match)->key + offset, value_p, len); \
e6445719
PS		 100 } while (0)
101
f5796684
JG		 102#define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \
103 SW_FLOW_KEY_MEMCPY_OFFSET(match, offsetof(struct sw_flow_key, field), \
104 value_p, len, is_mask)
105
e6445719
PS		 106static u16 range_n_bytes(const struct sw_flow_key_range *range)
107{
108 return range->end - range->start;
109}
110
111static bool match_validate(const struct sw_flow_match *match,
112 u64 key_attrs, u64 mask_attrs)
113{
114 u64 key_expected = 1 << OVS_KEY_ATTR_ETHERNET;
115 u64 mask_allowed = key_attrs; /* At most allow all key attributes */
116
117 /* The following mask attributes allowed only if they
118 * pass the validation tests. */
119 mask_allowed &= ~((1 << OVS_KEY_ATTR_IPV4)
120 | (1 << OVS_KEY_ATTR_IPV6)
121 | (1 << OVS_KEY_ATTR_TCP)
5eb26b15 122 | (1 << OVS_KEY_ATTR_TCP_FLAGS)
e6445719
PS		 123 | (1 << OVS_KEY_ATTR_UDP)
124 | (1 << OVS_KEY_ATTR_SCTP)
125 | (1 << OVS_KEY_ATTR_ICMP)
126 | (1 << OVS_KEY_ATTR_ICMPV6)
127 | (1 << OVS_KEY_ATTR_ARP)
128 | (1 << OVS_KEY_ATTR_ND));
129
130 /* Always allowed mask fields. */
131 mask_allowed |= ((1 << OVS_KEY_ATTR_TUNNEL)
132 | (1 << OVS_KEY_ATTR_IN_PORT)
133 | (1 << OVS_KEY_ATTR_ETHERTYPE));
134
135 /* Check key attributes. */
136 if (match->key->eth.type == htons(ETH_P_ARP)
137 || match->key->eth.type == htons(ETH_P_RARP)) {
138 key_expected |= 1 << OVS_KEY_ATTR_ARP;
139 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
140 mask_allowed |= 1 << OVS_KEY_ATTR_ARP;
141 }
142
143 if (match->key->eth.type == htons(ETH_P_IP)) {
144 key_expected |= 1 << OVS_KEY_ATTR_IPV4;
145 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
146 mask_allowed |= 1 << OVS_KEY_ATTR_IPV4;
147
148 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
149 if (match->key->ip.proto == IPPROTO_UDP) {
150 key_expected |= 1 << OVS_KEY_ATTR_UDP;
151 if (match->mask && (match->mask->key.ip.proto == 0xff))
152 mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
153 }
154
155 if (match->key->ip.proto == IPPROTO_SCTP) {
156 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
157 if (match->mask && (match->mask->key.ip.proto == 0xff))
158 mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
159 }
160
161 if (match->key->ip.proto == IPPROTO_TCP) {
162 key_expected |= 1 << OVS_KEY_ATTR_TCP;
5eb26b15
JR		 163 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
164 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
e6445719 165 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
5eb26b15
JR		 166 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
167 }
e6445719
PS		 168 }
169
170 if (match->key->ip.proto == IPPROTO_ICMP) {
171 key_expected |= 1 << OVS_KEY_ATTR_ICMP;
172 if (match->mask && (match->mask->key.ip.proto == 0xff))
173 mask_allowed |= 1 << OVS_KEY_ATTR_ICMP;
174 }
175 }
176 }
177
178 if (match->key->eth.type == htons(ETH_P_IPV6)) {
179 key_expected |= 1 << OVS_KEY_ATTR_IPV6;
180 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
181 mask_allowed |= 1 << OVS_KEY_ATTR_IPV6;
182
183 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
184 if (match->key->ip.proto == IPPROTO_UDP) {
185 key_expected |= 1 << OVS_KEY_ATTR_UDP;
186 if (match->mask && (match->mask->key.ip.proto == 0xff))
187 mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
188 }
189
190 if (match->key->ip.proto == IPPROTO_SCTP) {
191 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
192 if (match->mask && (match->mask->key.ip.proto == 0xff))
193 mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
194 }
195
196 if (match->key->ip.proto == IPPROTO_TCP) {
197 key_expected |= 1 << OVS_KEY_ATTR_TCP;
5eb26b15
JR		 198 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
199 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
e6445719 200 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
5eb26b15
JR		 201 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
202 }
e6445719
PS		 203 }
204
205 if (match->key->ip.proto == IPPROTO_ICMPV6) {
206 key_expected |= 1 << OVS_KEY_ATTR_ICMPV6;
207 if (match->mask && (match->mask->key.ip.proto == 0xff))
208 mask_allowed |= 1 << OVS_KEY_ATTR_ICMPV6;
209
1139e241 210 if (match->key->tp.src ==
e6445719 211 htons(NDISC_NEIGHBOUR_SOLICITATION) ||
1139e241 212 match->key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) {
e6445719 213 key_expected |= 1 << OVS_KEY_ATTR_ND;
1139e241 214 if (match->mask && (match->mask->key.tp.src == htons(0xffff)))
e6445719
PS		 215 mask_allowed |= 1 << OVS_KEY_ATTR_ND;
216 }
217 }
218 }
219 }
220
221 if ((key_attrs & key_expected) != key_expected) {
222 /* Key attributes check failed. */
223 OVS_NLERR("Missing expected key attributes (key_attrs=%llx, expected=%llx).\n",
cc23ebf3 224 (unsigned long long)key_attrs, (unsigned long long)key_expected);
e6445719
PS		 225 return false;
226 }
227
228 if ((mask_attrs & mask_allowed) != mask_attrs) {
229 /* Mask attributes check failed. */
230 OVS_NLERR("Contain more than allowed mask fields (mask_attrs=%llx, mask_allowed=%llx).\n",
cc23ebf3 231 (unsigned long long)mask_attrs, (unsigned long long)mask_allowed);
e6445719
PS		 232 return false;
233 }
234
235 return true;
236}
237
238/* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */
239static const int ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = {
240 [OVS_KEY_ATTR_ENCAP] = -1,
241 [OVS_KEY_ATTR_PRIORITY] = sizeof(u32),
242 [OVS_KEY_ATTR_IN_PORT] = sizeof(u32),
243 [OVS_KEY_ATTR_SKB_MARK] = sizeof(u32),
244 [OVS_KEY_ATTR_ETHERNET] = sizeof(struct ovs_key_ethernet),
245 [OVS_KEY_ATTR_VLAN] = sizeof(__be16),
246 [OVS_KEY_ATTR_ETHERTYPE] = sizeof(__be16),
247 [OVS_KEY_ATTR_IPV4] = sizeof(struct ovs_key_ipv4),
248 [OVS_KEY_ATTR_IPV6] = sizeof(struct ovs_key_ipv6),
249 [OVS_KEY_ATTR_TCP] = sizeof(struct ovs_key_tcp),
5eb26b15 250 [OVS_KEY_ATTR_TCP_FLAGS] = sizeof(__be16),
e6445719
PS		 251 [OVS_KEY_ATTR_UDP] = sizeof(struct ovs_key_udp),
252 [OVS_KEY_ATTR_SCTP] = sizeof(struct ovs_key_sctp),
253 [OVS_KEY_ATTR_ICMP] = sizeof(struct ovs_key_icmp),
254 [OVS_KEY_ATTR_ICMPV6] = sizeof(struct ovs_key_icmpv6),
255 [OVS_KEY_ATTR_ARP] = sizeof(struct ovs_key_arp),
256 [OVS_KEY_ATTR_ND] = sizeof(struct ovs_key_nd),
971427f3
AZ		 257 [OVS_KEY_ATTR_RECIRC_ID] = sizeof(u32),
258 [OVS_KEY_ATTR_DP_HASH] = sizeof(u32),
e6445719
PS		 259 [OVS_KEY_ATTR_TUNNEL] = -1,
260};
261
262static bool is_all_zero(const u8 *fp, size_t size)
263{
264 int i;
265
266 if (!fp)
267 return false;
268
269 for (i = 0; i < size; i++)
270 if (fp[i])
271 return false;
272
273 return true;
274}
275
276static int __parse_flow_nlattrs(const struct nlattr *attr,
277 const struct nlattr *a[],
278 u64 *attrsp, bool nz)
279{
280 const struct nlattr *nla;
281 u64 attrs;
282 int rem;
283
284 attrs = *attrsp;
285 nla_for_each_nested(nla, attr, rem) {
286 u16 type = nla_type(nla);
287 int expected_len;
288
289 if (type > OVS_KEY_ATTR_MAX) {
290 OVS_NLERR("Unknown key attribute (type=%d, max=%d).\n",
291 type, OVS_KEY_ATTR_MAX);
292 return -EINVAL;
293 }
294
295 if (attrs & (1 << type)) {
296 OVS_NLERR("Duplicate key attribute (type %d).\n", type);
297 return -EINVAL;
298 }
299
300 expected_len = ovs_key_lens[type];
301 if (nla_len(nla) != expected_len && expected_len != -1) {
302 OVS_NLERR("Key attribute has unexpected length (type=%d"
303 ", length=%d, expected=%d).\n", type,
304 nla_len(nla), expected_len);
305 return -EINVAL;
306 }
307
308 if (!nz || !is_all_zero(nla_data(nla), expected_len)) {
309 attrs |= 1 << type;
310 a[type] = nla;
311 }
312 }
313 if (rem) {
314 OVS_NLERR("Message has %d unknown bytes.\n", rem);
315 return -EINVAL;
316 }
317
318 *attrsp = attrs;
319 return 0;
320}
321
322static int parse_flow_mask_nlattrs(const struct nlattr *attr,
323 const struct nlattr *a[], u64 *attrsp)
324{
325 return __parse_flow_nlattrs(attr, a, attrsp, true);
326}
327
328static int parse_flow_nlattrs(const struct nlattr *attr,
329 const struct nlattr *a[], u64 *attrsp)
330{
331 return __parse_flow_nlattrs(attr, a, attrsp, false);
332}
333
334static int ipv4_tun_from_nlattr(const struct nlattr *attr,
335 struct sw_flow_match *match, bool is_mask)
336{
337 struct nlattr *a;
338 int rem;
339 bool ttl = false;
340 __be16 tun_flags = 0;
f5796684 341 unsigned long opt_key_offset;
e6445719
PS		 342
343 nla_for_each_nested(a, attr, rem) {
344 int type = nla_type(a);
345 static const u32 ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = {
346 [OVS_TUNNEL_KEY_ATTR_ID] = sizeof(u64),
347 [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = sizeof(u32),
348 [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = sizeof(u32),
349 [OVS_TUNNEL_KEY_ATTR_TOS] = 1,
350 [OVS_TUNNEL_KEY_ATTR_TTL] = 1,
351 [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = 0,
352 [OVS_TUNNEL_KEY_ATTR_CSUM] = 0,
67fa0341 353 [OVS_TUNNEL_KEY_ATTR_OAM] = 0,
f5796684 354 [OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS] = -1,
e6445719
PS		 355 };
356
357 if (type > OVS_TUNNEL_KEY_ATTR_MAX) {
358 OVS_NLERR("Unknown IPv4 tunnel attribute (type=%d, max=%d).\n",
359 type, OVS_TUNNEL_KEY_ATTR_MAX);
360 return -EINVAL;
361 }
362
f5796684
JG		 363 if (ovs_tunnel_key_lens[type] != nla_len(a) &&
364 ovs_tunnel_key_lens[type] != -1) {
e6445719
PS		 365 OVS_NLERR("IPv4 tunnel attribute type has unexpected "
366 " length (type=%d, length=%d, expected=%d).\n",
367 type, nla_len(a), ovs_tunnel_key_lens[type]);
368 return -EINVAL;
369 }
370
371 switch (type) {
372 case OVS_TUNNEL_KEY_ATTR_ID:
373 SW_FLOW_KEY_PUT(match, tun_key.tun_id,
374 nla_get_be64(a), is_mask);
375 tun_flags |= TUNNEL_KEY;
376 break;
377 case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
378 SW_FLOW_KEY_PUT(match, tun_key.ipv4_src,
379 nla_get_be32(a), is_mask);
380 break;
381 case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
382 SW_FLOW_KEY_PUT(match, tun_key.ipv4_dst,
383 nla_get_be32(a), is_mask);
384 break;
385 case OVS_TUNNEL_KEY_ATTR_TOS:
386 SW_FLOW_KEY_PUT(match, tun_key.ipv4_tos,
387 nla_get_u8(a), is_mask);
388 break;
389 case OVS_TUNNEL_KEY_ATTR_TTL:
390 SW_FLOW_KEY_PUT(match, tun_key.ipv4_ttl,
391 nla_get_u8(a), is_mask);
392 ttl = true;
393 break;
394 case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
395 tun_flags |= TUNNEL_DONT_FRAGMENT;
396 break;
397 case OVS_TUNNEL_KEY_ATTR_CSUM:
398 tun_flags |= TUNNEL_CSUM;
399 break;
67fa0341
JG		 400 case OVS_TUNNEL_KEY_ATTR_OAM:
401 tun_flags |= TUNNEL_OAM;
402 break;
f5796684
JG		 403 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
404 tun_flags |= TUNNEL_OPTIONS_PRESENT;
405 if (nla_len(a) > sizeof(match->key->tun_opts)) {
406 OVS_NLERR("Geneve option length exceeds maximum size (len %d, max %zu).\n",
407 nla_len(a),
408 sizeof(match->key->tun_opts));
409 return -EINVAL;
410 }
411
412 if (nla_len(a) % 4 != 0) {
413 OVS_NLERR("Geneve option length is not a multiple of 4 (len %d).\n",
414 nla_len(a));
415 return -EINVAL;
416 }
417
418 /* We need to record the length of the options passed
419 * down, otherwise packets with the same format but
420 * additional options will be silently matched.
421 */
422 if (!is_mask) {
423 SW_FLOW_KEY_PUT(match, tun_opts_len, nla_len(a),
424 false);
425 } else {
426 /* This is somewhat unusual because it looks at
427 * both the key and mask while parsing the
428 * attributes (and by extension assumes the key
429 * is parsed first). Normally, we would verify
430 * that each is the correct length and that the
431 * attributes line up in the validate function.
432 * However, that is difficult because this is
433 * variable length and we won't have the
434 * information later.
435 */
436 if (match->key->tun_opts_len != nla_len(a)) {
437 OVS_NLERR("Geneve option key length (%d) is different from mask length (%d).",
438 match->key->tun_opts_len,
439 nla_len(a));
440 return -EINVAL;
441 }
442
443 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff,
444 true);
445 }
446
447 opt_key_offset = (unsigned long)GENEVE_OPTS(
448 (struct sw_flow_key *)0,
449 nla_len(a));
450 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset,
451 nla_data(a), nla_len(a),
452 is_mask);
453 break;
e6445719 454 default:
f5796684
JG		 455 OVS_NLERR("Unknown IPv4 tunnel attribute (%d).\n",
456 type);
e6445719
PS		 457 return -EINVAL;
458 }
459 }
460
461 SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask);
462
463 if (rem > 0) {
464 OVS_NLERR("IPv4 tunnel attribute has %d unknown bytes.\n", rem);
465 return -EINVAL;
466 }
467
468 if (!is_mask) {
469 if (!match->key->tun_key.ipv4_dst) {
470 OVS_NLERR("IPv4 tunnel destination address is zero.\n");
471 return -EINVAL;
472 }
473
474 if (!ttl) {
475 OVS_NLERR("IPv4 tunnel TTL not specified.\n");
476 return -EINVAL;
477 }
478 }
479
480 return 0;
481}
482
f5796684
JG		 483static int __ipv4_tun_to_nlattr(struct sk_buff *skb,
484 const struct ovs_key_ipv4_tunnel *output,
485 const struct geneve_opt *tun_opts,
486 int swkey_tun_opts_len)
e6445719 487{
e6445719
PS		 488 if (output->tun_flags & TUNNEL_KEY &&
489 nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id))
490 return -EMSGSIZE;
491 if (output->ipv4_src &&
67fa0341 492 nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, output->ipv4_src))
e6445719
PS		 493 return -EMSGSIZE;
494 if (output->ipv4_dst &&
67fa0341 495 nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST, output->ipv4_dst))
e6445719
PS		 496 return -EMSGSIZE;
497 if (output->ipv4_tos &&
67fa0341 498 nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->ipv4_tos))
e6445719
PS		 499 return -EMSGSIZE;
500 if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ipv4_ttl))
501 return -EMSGSIZE;
502 if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) &&
67fa0341 503 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT))
e6445719
PS		 504 return -EMSGSIZE;
505 if ((output->tun_flags & TUNNEL_CSUM) &&
67fa0341
JG		 506 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM))
507 return -EMSGSIZE;
508 if ((output->tun_flags & TUNNEL_OAM) &&
509 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM))
e6445719 510 return -EMSGSIZE;
f5796684
JG		 511 if (tun_opts &&
512 nla_put(skb, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS,
513 swkey_tun_opts_len, tun_opts))
514 return -EMSGSIZE;
e6445719 515
e6445719
PS		 516 return 0;
517}
518
519
f5796684
JG		 520static int ipv4_tun_to_nlattr(struct sk_buff *skb,
521 const struct ovs_key_ipv4_tunnel *output,
522 const struct geneve_opt *tun_opts,
523 int swkey_tun_opts_len)
524{
525 struct nlattr *nla;
526 int err;
527
528 nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL);
529 if (!nla)
530 return -EMSGSIZE;
531
532 err = __ipv4_tun_to_nlattr(skb, output, tun_opts, swkey_tun_opts_len);
533 if (err)
534 return err;
535
536 nla_nest_end(skb, nla);
537 return 0;
538}
539
e6445719
PS		 540static int metadata_from_nlattrs(struct sw_flow_match *match, u64 *attrs,
541 const struct nlattr **a, bool is_mask)
542{
971427f3
AZ		 543 if (*attrs & (1 << OVS_KEY_ATTR_DP_HASH)) {
544 u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]);
545
546 SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask);
547 *attrs &= ~(1 << OVS_KEY_ATTR_DP_HASH);
548 }
549
550 if (*attrs & (1 << OVS_KEY_ATTR_RECIRC_ID)) {
551 u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]);
552
553 SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask);
554 *attrs &= ~(1 << OVS_KEY_ATTR_RECIRC_ID);
555 }
556
e6445719
PS		 557 if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) {
558 SW_FLOW_KEY_PUT(match, phy.priority,
559 nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask);
560 *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY);
561 }
562
563 if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) {
564 u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]);
565
566 if (is_mask)
567 in_port = 0xffffffff; /* Always exact match in_port. */
568 else if (in_port >= DP_MAX_PORTS)
569 return -EINVAL;
570
571 SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask);
572 *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT);
573 } else if (!is_mask) {
574 SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask);
575 }
576
577 if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) {
578 uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]);
579
580 SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask);
581 *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK);
582 }
583 if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) {
584 if (ipv4_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match,
585 is_mask))
586 return -EINVAL;
587 *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL);
588 }
589 return 0;
590}
591
23dabf88
JR		 592static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs,
593 const struct nlattr **a, bool is_mask)
e6445719
PS		 594{
595 int err;
596 u64 orig_attrs = attrs;
597
598 err = metadata_from_nlattrs(match, &attrs, a, is_mask);
599 if (err)
600 return err;
601
602 if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) {
603 const struct ovs_key_ethernet *eth_key;
604
605 eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]);
606 SW_FLOW_KEY_MEMCPY(match, eth.src,
607 eth_key->eth_src, ETH_ALEN, is_mask);
608 SW_FLOW_KEY_MEMCPY(match, eth.dst,
609 eth_key->eth_dst, ETH_ALEN, is_mask);
610 attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET);
611 }
612
613 if (attrs & (1 << OVS_KEY_ATTR_VLAN)) {
614 __be16 tci;
615
616 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
617 if (!(tci & htons(VLAN_TAG_PRESENT))) {
618 if (is_mask)
619 OVS_NLERR("VLAN TCI mask does not have exact match for VLAN_TAG_PRESENT bit.\n");
620 else
621 OVS_NLERR("VLAN TCI does not have VLAN_TAG_PRESENT bit set.\n");
622
623 return -EINVAL;
624 }
625
626 SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask);
627 attrs &= ~(1 << OVS_KEY_ATTR_VLAN);
628 } else if (!is_mask)
629 SW_FLOW_KEY_PUT(match, eth.tci, htons(0xffff), true);
630
631 if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) {
632 __be16 eth_type;
633
634 eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
635 if (is_mask) {
636 /* Always exact match EtherType. */
637 eth_type = htons(0xffff);
638 } else if (ntohs(eth_type) < ETH_P_802_3_MIN) {
639 OVS_NLERR("EtherType is less than minimum (type=%x, min=%x).\n",
640 ntohs(eth_type), ETH_P_802_3_MIN);
641 return -EINVAL;
642 }
643
644 SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask);
645 attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
646 } else if (!is_mask) {
647 SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask);
648 }
649
650 if (attrs & (1 << OVS_KEY_ATTR_IPV4)) {
651 const struct ovs_key_ipv4 *ipv4_key;
652
653 ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]);
654 if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) {
655 OVS_NLERR("Unknown IPv4 fragment type (value=%d, max=%d).\n",
656 ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX);
657 return -EINVAL;
658 }
659 SW_FLOW_KEY_PUT(match, ip.proto,
660 ipv4_key->ipv4_proto, is_mask);
661 SW_FLOW_KEY_PUT(match, ip.tos,
662 ipv4_key->ipv4_tos, is_mask);
663 SW_FLOW_KEY_PUT(match, ip.ttl,
664 ipv4_key->ipv4_ttl, is_mask);
665 SW_FLOW_KEY_PUT(match, ip.frag,
666 ipv4_key->ipv4_frag, is_mask);
667 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
668 ipv4_key->ipv4_src, is_mask);
669 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
670 ipv4_key->ipv4_dst, is_mask);
671 attrs &= ~(1 << OVS_KEY_ATTR_IPV4);
672 }
673
674 if (attrs & (1 << OVS_KEY_ATTR_IPV6)) {
675 const struct ovs_key_ipv6 *ipv6_key;
676
677 ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]);
678 if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) {
679 OVS_NLERR("Unknown IPv6 fragment type (value=%d, max=%d).\n",
680 ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX);
681 return -EINVAL;
682 }
683 SW_FLOW_KEY_PUT(match, ipv6.label,
684 ipv6_key->ipv6_label, is_mask);
685 SW_FLOW_KEY_PUT(match, ip.proto,
686 ipv6_key->ipv6_proto, is_mask);
687 SW_FLOW_KEY_PUT(match, ip.tos,
688 ipv6_key->ipv6_tclass, is_mask);
689 SW_FLOW_KEY_PUT(match, ip.ttl,
690 ipv6_key->ipv6_hlimit, is_mask);
691 SW_FLOW_KEY_PUT(match, ip.frag,
692 ipv6_key->ipv6_frag, is_mask);
693 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src,
694 ipv6_key->ipv6_src,
695 sizeof(match->key->ipv6.addr.src),
696 is_mask);
697 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst,
698 ipv6_key->ipv6_dst,
699 sizeof(match->key->ipv6.addr.dst),
700 is_mask);
701
702 attrs &= ~(1 << OVS_KEY_ATTR_IPV6);
703 }
704
705 if (attrs & (1 << OVS_KEY_ATTR_ARP)) {
706 const struct ovs_key_arp *arp_key;
707
708 arp_key = nla_data(a[OVS_KEY_ATTR_ARP]);
709 if (!is_mask && (arp_key->arp_op & htons(0xff00))) {
710 OVS_NLERR("Unknown ARP opcode (opcode=%d).\n",
711 arp_key->arp_op);
712 return -EINVAL;
713 }
714
715 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
716 arp_key->arp_sip, is_mask);
717 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
718 arp_key->arp_tip, is_mask);
719 SW_FLOW_KEY_PUT(match, ip.proto,
720 ntohs(arp_key->arp_op), is_mask);
721 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha,
722 arp_key->arp_sha, ETH_ALEN, is_mask);
723 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha,
724 arp_key->arp_tha, ETH_ALEN, is_mask);
725
726 attrs &= ~(1 << OVS_KEY_ATTR_ARP);
727 }
728
729 if (attrs & (1 << OVS_KEY_ATTR_TCP)) {
730 const struct ovs_key_tcp *tcp_key;
731
732 tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]);
1139e241
JR		 733 SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask);
734 SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask);
e6445719
PS		 735 attrs &= ~(1 << OVS_KEY_ATTR_TCP);
736 }
737
5eb26b15
JR		 738 if (attrs & (1 << OVS_KEY_ATTR_TCP_FLAGS)) {
739 if (orig_attrs & (1 << OVS_KEY_ATTR_IPV4)) {
1139e241 740 SW_FLOW_KEY_PUT(match, tp.flags,
5eb26b15
JR		 741 nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]),
742 is_mask);
743 } else {
1139e241 744 SW_FLOW_KEY_PUT(match, tp.flags,
5eb26b15
JR		 745 nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]),
746 is_mask);
747 }
748 attrs &= ~(1 << OVS_KEY_ATTR_TCP_FLAGS);
749 }
750
e6445719
PS		 751 if (attrs & (1 << OVS_KEY_ATTR_UDP)) {
752 const struct ovs_key_udp *udp_key;
753
754 udp_key = nla_data(a[OVS_KEY_ATTR_UDP]);
1139e241
JR		 755 SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask);
756 SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask);
e6445719
PS		 757 attrs &= ~(1 << OVS_KEY_ATTR_UDP);
758 }
759
760 if (attrs & (1 << OVS_KEY_ATTR_SCTP)) {
761 const struct ovs_key_sctp *sctp_key;
762
763 sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]);
1139e241
JR		 764 SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask);
765 SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask);
e6445719
PS		 766 attrs &= ~(1 << OVS_KEY_ATTR_SCTP);
767 }
768
769 if (attrs & (1 << OVS_KEY_ATTR_ICMP)) {
770 const struct ovs_key_icmp *icmp_key;
771
772 icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]);
1139e241 773 SW_FLOW_KEY_PUT(match, tp.src,
e6445719 774 htons(icmp_key->icmp_type), is_mask);
1139e241 775 SW_FLOW_KEY_PUT(match, tp.dst,
e6445719
PS		 776 htons(icmp_key->icmp_code), is_mask);
777 attrs &= ~(1 << OVS_KEY_ATTR_ICMP);
778 }
779
780 if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) {
781 const struct ovs_key_icmpv6 *icmpv6_key;
782
783 icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]);
1139e241 784 SW_FLOW_KEY_PUT(match, tp.src,
e6445719 785 htons(icmpv6_key->icmpv6_type), is_mask);
1139e241 786 SW_FLOW_KEY_PUT(match, tp.dst,
e6445719
PS		 787 htons(icmpv6_key->icmpv6_code), is_mask);
788 attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6);
789 }
790
791 if (attrs & (1 << OVS_KEY_ATTR_ND)) {
792 const struct ovs_key_nd *nd_key;
793
794 nd_key = nla_data(a[OVS_KEY_ATTR_ND]);
795 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target,
796 nd_key->nd_target,
797 sizeof(match->key->ipv6.nd.target),
798 is_mask);
799 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll,
800 nd_key->nd_sll, ETH_ALEN, is_mask);
801 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll,
802 nd_key->nd_tll, ETH_ALEN, is_mask);
803 attrs &= ~(1 << OVS_KEY_ATTR_ND);
804 }
805
806 if (attrs != 0)
807 return -EINVAL;
808
809 return 0;
810}
811
812static void sw_flow_mask_set(struct sw_flow_mask *mask,
813 struct sw_flow_key_range *range, u8 val)
814{
815 u8 *m = (u8 *)&mask->key + range->start;
816
817 mask->range = *range;
818 memset(m, val, range_n_bytes(range));
819}
820
821/**
822 * ovs_nla_get_match - parses Netlink attributes into a flow key and
823 * mask. In case the 'mask' is NULL, the flow is treated as exact match
824 * flow. Otherwise, it is treated as a wildcarded flow, except the mask
825 * does not include any don't care bit.
826 * @match: receives the extracted flow match information.
827 * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
828 * sequence. The fields should of the packet that triggered the creation
829 * of this flow.
830 * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink
831 * attribute specifies the mask field of the wildcarded flow.
832 */
833int ovs_nla_get_match(struct sw_flow_match *match,
834 const struct nlattr *key,
835 const struct nlattr *mask)
836{
837 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
838 const struct nlattr *encap;
839 u64 key_attrs = 0;
840 u64 mask_attrs = 0;
841 bool encap_valid = false;
842 int err;
843
844 err = parse_flow_nlattrs(key, a, &key_attrs);
845 if (err)
846 return err;
847
848 if ((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) &&
849 (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) &&
850 (nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]) == htons(ETH_P_8021Q))) {
851 __be16 tci;
852
853 if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) &&
854 (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) {
855 OVS_NLERR("Invalid Vlan frame.\n");
856 return -EINVAL;
857 }
858
859 key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
860 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
861 encap = a[OVS_KEY_ATTR_ENCAP];
862 key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP);
863 encap_valid = true;
864
865 if (tci & htons(VLAN_TAG_PRESENT)) {
866 err = parse_flow_nlattrs(encap, a, &key_attrs);
867 if (err)
868 return err;
869 } else if (!tci) {
870 /* Corner case for truncated 802.1Q header. */
871 if (nla_len(encap)) {
872 OVS_NLERR("Truncated 802.1Q header has non-zero encap attribute.\n");
873 return -EINVAL;
874 }
875 } else {
876 OVS_NLERR("Encap attribute is set for a non-VLAN frame.\n");
877 return -EINVAL;
878 }
879 }
880
23dabf88 881 err = ovs_key_from_nlattrs(match, key_attrs, a, false);
e6445719
PS		 882 if (err)
883 return err;
884
885 if (mask) {
886 err = parse_flow_mask_nlattrs(mask, a, &mask_attrs);
887 if (err)
888 return err;
889
890 if (mask_attrs & 1 << OVS_KEY_ATTR_ENCAP) {
891 __be16 eth_type = 0;
892 __be16 tci = 0;
893
894 if (!encap_valid) {
895 OVS_NLERR("Encap mask attribute is set for non-VLAN frame.\n");
896 return -EINVAL;
897 }
898
899 mask_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP);
900 if (a[OVS_KEY_ATTR_ETHERTYPE])
901 eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
902
903 if (eth_type == htons(0xffff)) {
904 mask_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
905 encap = a[OVS_KEY_ATTR_ENCAP];
906 err = parse_flow_mask_nlattrs(encap, a, &mask_attrs);
907 } else {
908 OVS_NLERR("VLAN frames must have an exact match on the TPID (mask=%x).\n",
909 ntohs(eth_type));
910 return -EINVAL;
911 }
912
913 if (a[OVS_KEY_ATTR_VLAN])
914 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
915
916 if (!(tci & htons(VLAN_TAG_PRESENT))) {
917 OVS_NLERR("VLAN tag present bit must have an exact match (tci_mask=%x).\n", ntohs(tci));
918 return -EINVAL;
919 }
920 }
921
23dabf88 922 err = ovs_key_from_nlattrs(match, mask_attrs, a, true);
e6445719
PS		 923 if (err)
924 return err;
925 } else {
926 /* Populate exact match flow's key mask. */
927 if (match->mask)
928 sw_flow_mask_set(match->mask, &match->range, 0xff);
929 }
930
931 if (!match_validate(match, key_attrs, mask_attrs))
932 return -EINVAL;
933
934 return 0;
935}
936
937/**
938 * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key.
83c8df26 939 * @key: Receives extracted in_port, priority, tun_key and skb_mark.
e6445719
PS		 940 * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
941 * sequence.
942 *
943 * This parses a series of Netlink attributes that form a flow key, which must
944 * take the same form accepted by flow_from_nlattrs(), but only enough of it to
945 * get the metadata, that is, the parts of the flow key that cannot be
946 * extracted from the packet itself.
947 */
948
83c8df26
PS		 949int ovs_nla_get_flow_metadata(const struct nlattr *attr,
950 struct sw_flow_key *key)
e6445719 951{
e6445719 952 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
83c8df26 953 struct sw_flow_match match;
e6445719
PS		 954 u64 attrs = 0;
955 int err;
e6445719
PS		 956
957 err = parse_flow_nlattrs(attr, a, &attrs);
958 if (err)
959 return -EINVAL;
960
961 memset(&match, 0, sizeof(match));
83c8df26 962 match.key = key;
e6445719 963
83c8df26 964 key->phy.in_port = DP_MAX_PORTS;
e6445719 965
83c8df26 966 return metadata_from_nlattrs(&match, &attrs, a, false);
e6445719
PS		 967}
968
969int ovs_nla_put_flow(const struct sw_flow_key *swkey,
970 const struct sw_flow_key *output, struct sk_buff *skb)
971{
972 struct ovs_key_ethernet *eth_key;
973 struct nlattr *nla, *encap;
974 bool is_mask = (swkey != output);
975
971427f3
AZ		 976 if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id))
977 goto nla_put_failure;
978
979 if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash))
980 goto nla_put_failure;
981
e6445719
PS		 982 if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority))
983 goto nla_put_failure;
984
f5796684
JG		 985 if ((swkey->tun_key.ipv4_dst || is_mask)) {
986 const struct geneve_opt *opts = NULL;
987
988 if (output->tun_key.tun_flags & TUNNEL_OPTIONS_PRESENT)
989 opts = GENEVE_OPTS(output, swkey->tun_opts_len);
990
991 if (ipv4_tun_to_nlattr(skb, &output->tun_key, opts,
992 swkey->tun_opts_len))
993 goto nla_put_failure;
994 }
e6445719
PS		 995
996 if (swkey->phy.in_port == DP_MAX_PORTS) {
997 if (is_mask && (output->phy.in_port == 0xffff))
998 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff))
999 goto nla_put_failure;
1000 } else {
1001 u16 upper_u16;
1002 upper_u16 = !is_mask ? 0 : 0xffff;
1003
1004 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT,
1005 (upper_u16 << 16) | output->phy.in_port))
1006 goto nla_put_failure;
1007 }
1008
1009 if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark))
1010 goto nla_put_failure;
1011
1012 nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key));
1013 if (!nla)
1014 goto nla_put_failure;
1015
1016 eth_key = nla_data(nla);
8c63ff09
JP		 1017 ether_addr_copy(eth_key->eth_src, output->eth.src);
1018 ether_addr_copy(eth_key->eth_dst, output->eth.dst);
e6445719
PS		 1019
1020 if (swkey->eth.tci || swkey->eth.type == htons(ETH_P_8021Q)) {
1021 __be16 eth_type;
1022 eth_type = !is_mask ? htons(ETH_P_8021Q) : htons(0xffff);
1023 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) ||
1024 nla_put_be16(skb, OVS_KEY_ATTR_VLAN, output->eth.tci))
1025 goto nla_put_failure;
1026 encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
1027 if (!swkey->eth.tci)
1028 goto unencap;
1029 } else
1030 encap = NULL;
1031
1032 if (swkey->eth.type == htons(ETH_P_802_2)) {
1033 /*
1034 * Ethertype 802.2 is represented in the netlink with omitted
1035 * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and
1036 * 0xffff in the mask attribute. Ethertype can also
1037 * be wildcarded.
1038 */
1039 if (is_mask && output->eth.type)
1040 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE,
1041 output->eth.type))
1042 goto nla_put_failure;
1043 goto unencap;
1044 }
1045
1046 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type))
1047 goto nla_put_failure;
1048
1049 if (swkey->eth.type == htons(ETH_P_IP)) {
1050 struct ovs_key_ipv4 *ipv4_key;
1051
1052 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key));
1053 if (!nla)
1054 goto nla_put_failure;
1055 ipv4_key = nla_data(nla);
1056 ipv4_key->ipv4_src = output->ipv4.addr.src;
1057 ipv4_key->ipv4_dst = output->ipv4.addr.dst;
1058 ipv4_key->ipv4_proto = output->ip.proto;
1059 ipv4_key->ipv4_tos = output->ip.tos;
1060 ipv4_key->ipv4_ttl = output->ip.ttl;
1061 ipv4_key->ipv4_frag = output->ip.frag;
1062 } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
1063 struct ovs_key_ipv6 *ipv6_key;
1064
1065 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key));
1066 if (!nla)
1067 goto nla_put_failure;
1068 ipv6_key = nla_data(nla);
1069 memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src,
1070 sizeof(ipv6_key->ipv6_src));
1071 memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst,
1072 sizeof(ipv6_key->ipv6_dst));
1073 ipv6_key->ipv6_label = output->ipv6.label;
1074 ipv6_key->ipv6_proto = output->ip.proto;
1075 ipv6_key->ipv6_tclass = output->ip.tos;
1076 ipv6_key->ipv6_hlimit = output->ip.ttl;
1077 ipv6_key->ipv6_frag = output->ip.frag;
1078 } else if (swkey->eth.type == htons(ETH_P_ARP) ||
1079 swkey->eth.type == htons(ETH_P_RARP)) {
1080 struct ovs_key_arp *arp_key;
1081
1082 nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key));
1083 if (!nla)
1084 goto nla_put_failure;
1085 arp_key = nla_data(nla);
1086 memset(arp_key, 0, sizeof(struct ovs_key_arp));
1087 arp_key->arp_sip = output->ipv4.addr.src;
1088 arp_key->arp_tip = output->ipv4.addr.dst;
1089 arp_key->arp_op = htons(output->ip.proto);
8c63ff09
JP		 1090 ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha);
1091 ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha);
e6445719
PS		 1092 }
1093
1094 if ((swkey->eth.type == htons(ETH_P_IP) ||
1095 swkey->eth.type == htons(ETH_P_IPV6)) &&
1096 swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
1097
1098 if (swkey->ip.proto == IPPROTO_TCP) {
1099 struct ovs_key_tcp *tcp_key;
1100
1101 nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key));
1102 if (!nla)
1103 goto nla_put_failure;
1104 tcp_key = nla_data(nla);
1139e241
JR		 1105 tcp_key->tcp_src = output->tp.src;
1106 tcp_key->tcp_dst = output->tp.dst;
1107 if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS,
1108 output->tp.flags))
1109 goto nla_put_failure;
e6445719
PS		 1110 } else if (swkey->ip.proto == IPPROTO_UDP) {
1111 struct ovs_key_udp *udp_key;
1112
1113 nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key));
1114 if (!nla)
1115 goto nla_put_failure;
1116 udp_key = nla_data(nla);
1139e241
JR		 1117 udp_key->udp_src = output->tp.src;
1118 udp_key->udp_dst = output->tp.dst;
e6445719
PS		 1119 } else if (swkey->ip.proto == IPPROTO_SCTP) {
1120 struct ovs_key_sctp *sctp_key;
1121
1122 nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key));
1123 if (!nla)
1124 goto nla_put_failure;
1125 sctp_key = nla_data(nla);
1139e241
JR		 1126 sctp_key->sctp_src = output->tp.src;
1127 sctp_key->sctp_dst = output->tp.dst;
e6445719
PS		 1128 } else if (swkey->eth.type == htons(ETH_P_IP) &&
1129 swkey->ip.proto == IPPROTO_ICMP) {
1130 struct ovs_key_icmp *icmp_key;
1131
1132 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key));
1133 if (!nla)
1134 goto nla_put_failure;
1135 icmp_key = nla_data(nla);
1139e241
JR		 1136 icmp_key->icmp_type = ntohs(output->tp.src);
1137 icmp_key->icmp_code = ntohs(output->tp.dst);
e6445719
PS		 1138 } else if (swkey->eth.type == htons(ETH_P_IPV6) &&
1139 swkey->ip.proto == IPPROTO_ICMPV6) {
1140 struct ovs_key_icmpv6 *icmpv6_key;
1141
1142 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6,
1143 sizeof(*icmpv6_key));
1144 if (!nla)
1145 goto nla_put_failure;
1146 icmpv6_key = nla_data(nla);
1139e241
JR		 1147 icmpv6_key->icmpv6_type = ntohs(output->tp.src);
1148 icmpv6_key->icmpv6_code = ntohs(output->tp.dst);
e6445719
PS		 1149
1150 if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION ||
1151 icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) {
1152 struct ovs_key_nd *nd_key;
1153
1154 nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key));
1155 if (!nla)
1156 goto nla_put_failure;
1157 nd_key = nla_data(nla);
1158 memcpy(nd_key->nd_target, &output->ipv6.nd.target,
1159 sizeof(nd_key->nd_target));
8c63ff09
JP		 1160 ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll);
1161 ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll);
e6445719
PS		 1162 }
1163 }
1164 }
1165
1166unencap:
1167 if (encap)
1168 nla_nest_end(skb, encap);
1169
1170 return 0;
1171
1172nla_put_failure:
1173 return -EMSGSIZE;
1174}
1175
1176#define MAX_ACTIONS_BUFSIZE (32 * 1024)
1177
1178struct sw_flow_actions *ovs_nla_alloc_flow_actions(int size)
1179{
1180 struct sw_flow_actions *sfa;
1181
1182 if (size > MAX_ACTIONS_BUFSIZE)
1183 return ERR_PTR(-EINVAL);
1184
1185 sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL);
1186 if (!sfa)
1187 return ERR_PTR(-ENOMEM);
1188
1189 sfa->actions_len = 0;
1190 return sfa;
1191}
1192
e6445719
PS		 1193/* Schedules 'sf_acts' to be freed after the next RCU grace period.
1194 * The caller must hold rcu_read_lock for this to be sensible. */
1195void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts)
1196{
11d6c461 1197 kfree_rcu(sf_acts, rcu);
e6445719
PS		 1198}
1199
1200static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa,
1201 int attr_len)
1202{
1203
1204 struct sw_flow_actions *acts;
1205 int new_acts_size;
1206 int req_size = NLA_ALIGN(attr_len);
1207 int next_offset = offsetof(struct sw_flow_actions, actions) +
1208 (*sfa)->actions_len;
1209
1210 if (req_size <= (ksize(*sfa) - next_offset))
1211 goto out;
1212
1213 new_acts_size = ksize(*sfa) * 2;
1214
1215 if (new_acts_size > MAX_ACTIONS_BUFSIZE) {
1216 if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size)
1217 return ERR_PTR(-EMSGSIZE);
1218 new_acts_size = MAX_ACTIONS_BUFSIZE;
1219 }
1220
1221 acts = ovs_nla_alloc_flow_actions(new_acts_size);
1222 if (IS_ERR(acts))
1223 return (void *)acts;
1224
1225 memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len);
1226 acts->actions_len = (*sfa)->actions_len;
1227 kfree(*sfa);
1228 *sfa = acts;
1229
1230out:
1231 (*sfa)->actions_len += req_size;
1232 return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset);
1233}
1234
f0b128c1
JG		 1235static struct nlattr *__add_action(struct sw_flow_actions **sfa,
1236 int attrtype, void *data, int len)
e6445719
PS		 1237{
1238 struct nlattr *a;
1239
1240 a = reserve_sfa_size(sfa, nla_attr_size(len));
1241 if (IS_ERR(a))
f0b128c1 1242 return a;
e6445719
PS		 1243
1244 a->nla_type = attrtype;
1245 a->nla_len = nla_attr_size(len);
1246
1247 if (data)
1248 memcpy(nla_data(a), data, len);
1249 memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len));
1250
f0b128c1
JG		 1251 return a;
1252}
1253
1254static int add_action(struct sw_flow_actions **sfa, int attrtype,
1255 void *data, int len)
1256{
1257 struct nlattr *a;
1258
1259 a = __add_action(sfa, attrtype, data, len);
1260 if (IS_ERR(a))
1261 return PTR_ERR(a);
1262
e6445719
PS		 1263 return 0;
1264}
1265
1266static inline int add_nested_action_start(struct sw_flow_actions **sfa,
1267 int attrtype)
1268{
1269 int used = (*sfa)->actions_len;
1270 int err;
1271
1272 err = add_action(sfa, attrtype, NULL, 0);
1273 if (err)
1274 return err;
1275
1276 return used;
1277}
1278
1279static inline void add_nested_action_end(struct sw_flow_actions *sfa,
1280 int st_offset)
1281{
1282 struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions +
1283 st_offset);
1284
1285 a->nla_len = sfa->actions_len - st_offset;
1286}
1287
1288static int validate_and_copy_sample(const struct nlattr *attr,
1289 const struct sw_flow_key *key, int depth,
1290 struct sw_flow_actions **sfa)
1291{
1292 const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];
1293 const struct nlattr *probability, *actions;
1294 const struct nlattr *a;
1295 int rem, start, err, st_acts;
1296
1297 memset(attrs, 0, sizeof(attrs));
1298 nla_for_each_nested(a, attr, rem) {
1299 int type = nla_type(a);
1300 if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type])
1301 return -EINVAL;
1302 attrs[type] = a;
1303 }
1304 if (rem)
1305 return -EINVAL;
1306
1307 probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY];
1308 if (!probability || nla_len(probability) != sizeof(u32))
1309 return -EINVAL;
1310
1311 actions = attrs[OVS_SAMPLE_ATTR_ACTIONS];
1312 if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN))
1313 return -EINVAL;
1314
1315 /* validation done, copy sample action. */
1316 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE);
1317 if (start < 0)
1318 return start;
1319 err = add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY,
1320 nla_data(probability), sizeof(u32));
1321 if (err)
1322 return err;
1323 st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS);
1324 if (st_acts < 0)
1325 return st_acts;
1326
1327 err = ovs_nla_copy_actions(actions, key, depth + 1, sfa);
1328 if (err)
1329 return err;
1330
1331 add_nested_action_end(*sfa, st_acts);
1332 add_nested_action_end(*sfa, start);
1333
1334 return 0;
1335}
1336
1337static int validate_tp_port(const struct sw_flow_key *flow_key)
1338{
1139e241
JR		 1339 if ((flow_key->eth.type == htons(ETH_P_IP) ||
1340 flow_key->eth.type == htons(ETH_P_IPV6)) &&
1341 (flow_key->tp.src || flow_key->tp.dst))
1342 return 0;
e6445719
PS		 1343
1344 return -EINVAL;
1345}
1346
1347void ovs_match_init(struct sw_flow_match *match,
1348 struct sw_flow_key *key,
1349 struct sw_flow_mask *mask)
1350{
1351 memset(match, 0, sizeof(*match));
1352 match->key = key;
1353 match->mask = mask;
1354
1355 memset(key, 0, sizeof(*key));
1356
1357 if (mask) {
1358 memset(&mask->key, 0, sizeof(mask->key));
1359 mask->range.start = mask->range.end = 0;
1360 }
1361}
1362
1363static int validate_and_copy_set_tun(const struct nlattr *attr,
1364 struct sw_flow_actions **sfa)
1365{
1366 struct sw_flow_match match;
1367 struct sw_flow_key key;
f0b128c1
JG		 1368 struct ovs_tunnel_info *tun_info;
1369 struct nlattr *a;
e6445719
PS		 1370 int err, start;
1371
1372 ovs_match_init(&match, &key, NULL);
1373 err = ipv4_tun_from_nlattr(nla_data(attr), &match, false);
1374 if (err)
1375 return err;
1376
f5796684
JG		 1377 if (key.tun_opts_len) {
1378 struct geneve_opt *option = GENEVE_OPTS(&key,
1379 key.tun_opts_len);
1380 int opts_len = key.tun_opts_len;
1381 bool crit_opt = false;
1382
1383 while (opts_len > 0) {
1384 int len;
1385
1386 if (opts_len < sizeof(*option))
1387 return -EINVAL;
1388
1389 len = sizeof(*option) + option->length * 4;
1390 if (len > opts_len)
1391 return -EINVAL;
1392
1393 crit_opt |= !!(option->type & GENEVE_CRIT_OPT_TYPE);
1394
1395 option = (struct geneve_opt *)((u8 *)option + len);
1396 opts_len -= len;
1397 };
1398
1399 key.tun_key.tun_flags |= crit_opt ? TUNNEL_CRIT_OPT : 0;
1400 };
1401
e6445719
PS		 1402 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET);
1403 if (start < 0)
1404 return start;
1405
f0b128c1 1406 a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL,
f5796684 1407 sizeof(*tun_info) + key.tun_opts_len);
f0b128c1
JG		 1408 if (IS_ERR(a))
1409 return PTR_ERR(a);
1410
1411 tun_info = nla_data(a);
1412 tun_info->tunnel = key.tun_key;
f5796684
JG		 1413 tun_info->options_len = key.tun_opts_len;
1414
1415 if (tun_info->options_len) {
1416 /* We need to store the options in the action itself since
1417 * everything else will go away after flow setup. We can append
1418 * it to tun_info and then point there.
1419 */
1420 memcpy((tun_info + 1), GENEVE_OPTS(&key, key.tun_opts_len),
1421 key.tun_opts_len);
1422 tun_info->options = (struct geneve_opt *)(tun_info + 1);
1423 } else {
1424 tun_info->options = NULL;
1425 }
f0b128c1 1426
e6445719
PS		 1427 add_nested_action_end(*sfa, start);
1428
1429 return err;
1430}
1431
1432static int validate_set(const struct nlattr *a,
1433 const struct sw_flow_key *flow_key,
1434 struct sw_flow_actions **sfa,
1435 bool *set_tun)
1436{
1437 const struct nlattr *ovs_key = nla_data(a);
1438 int key_type = nla_type(ovs_key);
1439
1440 /* There can be only one key in a action */
1441 if (nla_total_size(nla_len(ovs_key)) != nla_len(a))
1442 return -EINVAL;
1443
1444 if (key_type > OVS_KEY_ATTR_MAX ||
1445 (ovs_key_lens[key_type] != nla_len(ovs_key) &&
1446 ovs_key_lens[key_type] != -1))
1447 return -EINVAL;
1448
1449 switch (key_type) {
1450 const struct ovs_key_ipv4 *ipv4_key;
1451 const struct ovs_key_ipv6 *ipv6_key;
1452 int err;
1453
1454 case OVS_KEY_ATTR_PRIORITY:
1455 case OVS_KEY_ATTR_SKB_MARK:
1456 case OVS_KEY_ATTR_ETHERNET:
1457 break;
1458
1459 case OVS_KEY_ATTR_TUNNEL:
1460 *set_tun = true;
1461 err = validate_and_copy_set_tun(a, sfa);
1462 if (err)
1463 return err;
1464 break;
1465
1466 case OVS_KEY_ATTR_IPV4:
1467 if (flow_key->eth.type != htons(ETH_P_IP))
1468 return -EINVAL;
1469
1470 if (!flow_key->ip.proto)
1471 return -EINVAL;
1472
1473 ipv4_key = nla_data(ovs_key);
1474 if (ipv4_key->ipv4_proto != flow_key->ip.proto)
1475 return -EINVAL;
1476
1477 if (ipv4_key->ipv4_frag != flow_key->ip.frag)
1478 return -EINVAL;
1479
1480 break;
1481
1482 case OVS_KEY_ATTR_IPV6:
1483 if (flow_key->eth.type != htons(ETH_P_IPV6))
1484 return -EINVAL;
1485
1486 if (!flow_key->ip.proto)
1487 return -EINVAL;
1488
1489 ipv6_key = nla_data(ovs_key);
1490 if (ipv6_key->ipv6_proto != flow_key->ip.proto)
1491 return -EINVAL;
1492
1493 if (ipv6_key->ipv6_frag != flow_key->ip.frag)
1494 return -EINVAL;
1495
1496 if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000)
1497 return -EINVAL;
1498
1499 break;
1500
1501 case OVS_KEY_ATTR_TCP:
1502 if (flow_key->ip.proto != IPPROTO_TCP)
1503 return -EINVAL;
1504
1505 return validate_tp_port(flow_key);
1506
1507 case OVS_KEY_ATTR_UDP:
1508 if (flow_key->ip.proto != IPPROTO_UDP)
1509 return -EINVAL;
1510
1511 return validate_tp_port(flow_key);
1512
1513 case OVS_KEY_ATTR_SCTP:
1514 if (flow_key->ip.proto != IPPROTO_SCTP)
1515 return -EINVAL;
1516
1517 return validate_tp_port(flow_key);
1518
1519 default:
1520 return -EINVAL;
1521 }
1522
1523 return 0;
1524}
1525
1526static int validate_userspace(const struct nlattr *attr)
1527{
1528 static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = {
1529 [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 },
1530 [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC },
1531 };
1532 struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];
1533 int error;
1534
1535 error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX,
1536 attr, userspace_policy);
1537 if (error)
1538 return error;
1539
1540 if (!a[OVS_USERSPACE_ATTR_PID] ||
1541 !nla_get_u32(a[OVS_USERSPACE_ATTR_PID]))
1542 return -EINVAL;
1543
1544 return 0;
1545}
1546
1547static int copy_action(const struct nlattr *from,
1548 struct sw_flow_actions **sfa)
1549{
1550 int totlen = NLA_ALIGN(from->nla_len);
1551 struct nlattr *to;
1552
1553 to = reserve_sfa_size(sfa, from->nla_len);
1554 if (IS_ERR(to))
1555 return PTR_ERR(to);
1556
1557 memcpy(to, from, totlen);
1558 return 0;
1559}
1560
1561int ovs_nla_copy_actions(const struct nlattr *attr,
1562 const struct sw_flow_key *key,
1563 int depth,
1564 struct sw_flow_actions **sfa)
1565{
1566 const struct nlattr *a;
1567 int rem, err;
1568
1569 if (depth >= SAMPLE_ACTION_DEPTH)
1570 return -EOVERFLOW;
1571
1572 nla_for_each_nested(a, attr, rem) {
1573 /* Expected argument lengths, (u32)-1 for variable length. */
1574 static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {
1575 [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32),
971427f3 1576 [OVS_ACTION_ATTR_RECIRC] = sizeof(u32),
e6445719
PS		 1577 [OVS_ACTION_ATTR_USERSPACE] = (u32)-1,
1578 [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan),
1579 [OVS_ACTION_ATTR_POP_VLAN] = 0,
1580 [OVS_ACTION_ATTR_SET] = (u32)-1,
971427f3
AZ		 1581 [OVS_ACTION_ATTR_SAMPLE] = (u32)-1,
1582 [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash)
e6445719
PS		 1583 };
1584 const struct ovs_action_push_vlan *vlan;
1585 int type = nla_type(a);
1586 bool skip_copy;
1587
1588 if (type > OVS_ACTION_ATTR_MAX ||
1589 (action_lens[type] != nla_len(a) &&
1590 action_lens[type] != (u32)-1))
1591 return -EINVAL;
1592
1593 skip_copy = false;
1594 switch (type) {
1595 case OVS_ACTION_ATTR_UNSPEC:
1596 return -EINVAL;
1597
1598 case OVS_ACTION_ATTR_USERSPACE:
1599 err = validate_userspace(a);
1600 if (err)
1601 return err;
1602 break;
1603
1604 case OVS_ACTION_ATTR_OUTPUT:
1605 if (nla_get_u32(a) >= DP_MAX_PORTS)
1606 return -EINVAL;
1607 break;
1608
971427f3
AZ		 1609 case OVS_ACTION_ATTR_HASH: {
1610 const struct ovs_action_hash *act_hash = nla_data(a);
1611
1612 switch (act_hash->hash_alg) {
1613 case OVS_HASH_ALG_L4:
1614 break;
1615 default:
1616 return -EINVAL;
1617 }
1618
1619 break;
1620 }
e6445719
PS		 1621
1622 case OVS_ACTION_ATTR_POP_VLAN:
1623 break;
1624
1625 case OVS_ACTION_ATTR_PUSH_VLAN:
1626 vlan = nla_data(a);
1627 if (vlan->vlan_tpid != htons(ETH_P_8021Q))
1628 return -EINVAL;
1629 if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT)))
1630 return -EINVAL;
1631 break;
1632
971427f3
AZ		 1633 case OVS_ACTION_ATTR_RECIRC:
1634 break;
1635
e6445719
PS		 1636 case OVS_ACTION_ATTR_SET:
1637 err = validate_set(a, key, sfa, &skip_copy);
1638 if (err)
1639 return err;
1640 break;
1641
1642 case OVS_ACTION_ATTR_SAMPLE:
1643 err = validate_and_copy_sample(a, key, depth, sfa);
1644 if (err)
1645 return err;
1646 skip_copy = true;
1647 break;
1648
1649 default:
1650 return -EINVAL;
1651 }
1652 if (!skip_copy) {
1653 err = copy_action(a, sfa);
1654 if (err)
1655 return err;
1656 }
1657 }
1658
1659 if (rem > 0)
1660 return -EINVAL;
1661
1662 return 0;
1663}
1664
1665static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb)
1666{
1667 const struct nlattr *a;
1668 struct nlattr *start;
1669 int err = 0, rem;
1670
1671 start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE);
1672 if (!start)
1673 return -EMSGSIZE;
1674
1675 nla_for_each_nested(a, attr, rem) {
1676 int type = nla_type(a);
1677 struct nlattr *st_sample;
1678
1679 switch (type) {
1680 case OVS_SAMPLE_ATTR_PROBABILITY:
1681 if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY,
1682 sizeof(u32), nla_data(a)))
1683 return -EMSGSIZE;
1684 break;
1685 case OVS_SAMPLE_ATTR_ACTIONS:
1686 st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS);
1687 if (!st_sample)
1688 return -EMSGSIZE;
1689 err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb);
1690 if (err)
1691 return err;
1692 nla_nest_end(skb, st_sample);
1693 break;
1694 }
1695 }
1696
1697 nla_nest_end(skb, start);
1698 return err;
1699}
1700
1701static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb)
1702{
1703 const struct nlattr *ovs_key = nla_data(a);
1704 int key_type = nla_type(ovs_key);
1705 struct nlattr *start;
1706 int err;
1707
1708 switch (key_type) {
f0b128c1
JG		 1709 case OVS_KEY_ATTR_TUNNEL_INFO: {
1710 struct ovs_tunnel_info *tun_info = nla_data(ovs_key);
1711
e6445719
PS		 1712 start = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
1713 if (!start)
1714 return -EMSGSIZE;
1715
f0b128c1 1716 err = ipv4_tun_to_nlattr(skb, &tun_info->tunnel,
f5796684
JG		 1717 tun_info->options_len ?
1718 tun_info->options : NULL,
1719 tun_info->options_len);
e6445719
PS		 1720 if (err)
1721 return err;
1722 nla_nest_end(skb, start);
1723 break;
f0b128c1 1724 }
e6445719
PS		 1725 default:
1726 if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key))
1727 return -EMSGSIZE;
1728 break;
1729 }
1730
1731 return 0;
1732}
1733
1734int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb)
1735{
1736 const struct nlattr *a;
1737 int rem, err;
1738
1739 nla_for_each_attr(a, attr, len, rem) {
1740 int type = nla_type(a);
1741
1742 switch (type) {
1743 case OVS_ACTION_ATTR_SET:
1744 err = set_action_to_attr(a, skb);
1745 if (err)
1746 return err;
1747 break;
1748
1749 case OVS_ACTION_ATTR_SAMPLE:
1750 err = sample_action_to_attr(a, skb);
1751 if (err)
1752 return err;
1753 break;
1754 default:
1755 if (nla_put(skb, type, nla_len(a), nla_data(a)))
1756 return -EMSGSIZE;
1757 break;
1758 }
1759 }
1760
1761 return 0;
1762}
Linux kernel - Deliverables
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