]> git.proxmox.com Git - ovs.git/blame - datapath/flow_netlink.c
projects / ovs.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
datapath-windows: Fix crash when internal port is removed.
[ovs.git] / datapath / flow_netlink.c
CommitLineData
a097c0b2 1/*
05499369 2 * Copyright (c) 2007-2014 Nicira, Inc.
a097c0b2
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
0a0857df
JP		 19#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
20
a097c0b2
PS		 21#include "flow.h"
22#include "datapath.h"
ccf43786 23#include "mpls.h"
a097c0b2
PS		 24#include <linux/uaccess.h>
25#include <linux/netdevice.h>
26#include <linux/etherdevice.h>
27#include <linux/if_ether.h>
28#include <linux/if_vlan.h>
29#include <net/llc_pdu.h>
30#include <linux/kernel.h>
31#include <linux/jhash.h>
32#include <linux/jiffies.h>
33#include <linux/llc.h>
34#include <linux/module.h>
35#include <linux/in.h>
36#include <linux/rcupdate.h>
37#include <linux/if_arp.h>
38#include <linux/ip.h>
39#include <linux/ipv6.h>
40#include <linux/sctp.h>
41#include <linux/tcp.h>
42#include <linux/udp.h>
43#include <linux/icmp.h>
44#include <linux/icmpv6.h>
45#include <linux/rculist.h>
c1fc1411 46#include <net/geneve.h>
a097c0b2 47#include <net/ip.h>
29c71cfa 48#include <net/ip_tunnels.h>
a097c0b2
PS		 49#include <net/ipv6.h>
50#include <net/ndisc.h>
51
52#include "flow_netlink.h"
53
54static void update_range__(struct sw_flow_match *match,
55 size_t offset, size_t size, bool is_mask)
56{
57 struct sw_flow_key_range *range = NULL;
58 size_t start = rounddown(offset, sizeof(long));
59 size_t end = roundup(offset + size, sizeof(long));
60
61 if (!is_mask)
62 range = &match->range;
63 else if (match->mask)
64 range = &match->mask->range;
65
66 if (!range)
67 return;
68
69 if (range->start == range->end) {
70 range->start = start;
71 range->end = end;
72 return;
73 }
74
75 if (range->start > start)
76 range->start = start;
77
78 if (range->end < end)
79 range->end = end;
80}
81
82#define SW_FLOW_KEY_PUT(match, field, value, is_mask) \
83 do { \
84 update_range__(match, offsetof(struct sw_flow_key, field), \
85 sizeof((match)->key->field), is_mask); \
86 if (is_mask) { \
87 if ((match)->mask) \
88 (match)->mask->key.field = value; \
89 } else { \
90 (match)->key->field = value; \
91 } \
92 } while (0)
93
c1fc1411 94#define SW_FLOW_KEY_MEMCPY_OFFSET(match, offset, value_p, len, is_mask) \
a097c0b2 95 do { \
c1fc1411 96 update_range__(match, offset, len, is_mask); \
a097c0b2
PS		 97 if (is_mask) { \
98 if ((match)->mask) \
c1fc1411 99 memcpy((u8 *)&(match)->mask->key + offset, value_p, len);\
a097c0b2 100 } else { \
c1fc1411 101 memcpy((u8 *)(match)->key + offset, value_p, len); \
a097c0b2
PS		 102 } \
103 } while (0)
104
c1fc1411
JG		 105#define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \
106 SW_FLOW_KEY_MEMCPY_OFFSET(match, offsetof(struct sw_flow_key, field), \
107 value_p, len, is_mask)
108
0b496cda
DDP		 109#define SW_FLOW_KEY_MEMSET_FIELD(match, field, value, is_mask) \
110 do { \
111 update_range__(match, offsetof(struct sw_flow_key, field), \
112 sizeof((match)->key->field), is_mask); \
113 if (is_mask) { \
114 if ((match)->mask) \
115 memset((u8 *)&(match)->mask->key.field, value,\
116 sizeof((match)->mask->key.field)); \
117 } else { \
118 memset((u8 *)&(match)->key->field, value, \
119 sizeof((match)->key->field)); \
120 } \
121 } while (0)
122
a097c0b2
PS		 123static bool match_validate(const struct sw_flow_match *match,
124 u64 key_attrs, u64 mask_attrs)
125{
126 u64 key_expected = 1ULL << OVS_KEY_ATTR_ETHERNET;
127 u64 mask_allowed = key_attrs; /* At most allow all key attributes */
128
129 /* The following mask attributes allowed only if they
130 * pass the validation tests. */
131 mask_allowed &= ~((1ULL << OVS_KEY_ATTR_IPV4)
132 | (1ULL << OVS_KEY_ATTR_IPV6)
133 | (1ULL << OVS_KEY_ATTR_TCP)
dc235f7f 134 | (1ULL << OVS_KEY_ATTR_TCP_FLAGS)
a097c0b2
PS		 135 | (1ULL << OVS_KEY_ATTR_UDP)
136 | (1ULL << OVS_KEY_ATTR_SCTP)
137 | (1ULL << OVS_KEY_ATTR_ICMP)
138 | (1ULL << OVS_KEY_ATTR_ICMPV6)
139 | (1ULL << OVS_KEY_ATTR_ARP)
ccf43786
SH		 140 | (1ULL << OVS_KEY_ATTR_ND)
141 | (1ULL << OVS_KEY_ATTR_MPLS));
a097c0b2
PS		 142
143 /* Always allowed mask fields. */
144 mask_allowed |= ((1ULL << OVS_KEY_ATTR_TUNNEL)
145 | (1ULL << OVS_KEY_ATTR_IN_PORT)
146 | (1ULL << OVS_KEY_ATTR_ETHERTYPE));
147
148 /* Check key attributes. */
149 if (match->key->eth.type == htons(ETH_P_ARP)
150 || match->key->eth.type == htons(ETH_P_RARP)) {
151 key_expected |= 1ULL << OVS_KEY_ATTR_ARP;
152 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
153 mask_allowed |= 1ULL << OVS_KEY_ATTR_ARP;
154 }
155
ccf43786
SH		 156
157 if (eth_p_mpls(match->key->eth.type)) {
158 key_expected |= 1ULL << OVS_KEY_ATTR_MPLS;
159 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
160 mask_allowed |= 1ULL << OVS_KEY_ATTR_MPLS;
161 }
162
a097c0b2
PS		 163 if (match->key->eth.type == htons(ETH_P_IP)) {
164 key_expected |= 1ULL << OVS_KEY_ATTR_IPV4;
165 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
166 mask_allowed |= 1ULL << OVS_KEY_ATTR_IPV4;
167
168 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
169 if (match->key->ip.proto == IPPROTO_UDP) {
170 key_expected |= 1ULL << OVS_KEY_ATTR_UDP;
171 if (match->mask && (match->mask->key.ip.proto == 0xff))
172 mask_allowed |= 1ULL << OVS_KEY_ATTR_UDP;
173 }
174
175 if (match->key->ip.proto == IPPROTO_SCTP) {
176 key_expected |= 1ULL << OVS_KEY_ATTR_SCTP;
177 if (match->mask && (match->mask->key.ip.proto == 0xff))
178 mask_allowed |= 1ULL << OVS_KEY_ATTR_SCTP;
179 }
180
181 if (match->key->ip.proto == IPPROTO_TCP) {
182 key_expected |= 1ULL << OVS_KEY_ATTR_TCP;
dc235f7f
JR		 183 key_expected |= 1ULL << OVS_KEY_ATTR_TCP_FLAGS;
184 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
a097c0b2 185 mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP;
dc235f7f
JR		 186 mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP_FLAGS;
187 }
a097c0b2
PS		 188 }
189
190 if (match->key->ip.proto == IPPROTO_ICMP) {
191 key_expected |= 1ULL << OVS_KEY_ATTR_ICMP;
192 if (match->mask && (match->mask->key.ip.proto == 0xff))
193 mask_allowed |= 1ULL << OVS_KEY_ATTR_ICMP;
194 }
195 }
196 }
197
198 if (match->key->eth.type == htons(ETH_P_IPV6)) {
199 key_expected |= 1ULL << OVS_KEY_ATTR_IPV6;
200 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
201 mask_allowed |= 1ULL << OVS_KEY_ATTR_IPV6;
202
203 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
204 if (match->key->ip.proto == IPPROTO_UDP) {
205 key_expected |= 1ULL << OVS_KEY_ATTR_UDP;
206 if (match->mask && (match->mask->key.ip.proto == 0xff))
207 mask_allowed |= 1ULL << OVS_KEY_ATTR_UDP;
208 }
209
210 if (match->key->ip.proto == IPPROTO_SCTP) {
211 key_expected |= 1ULL << OVS_KEY_ATTR_SCTP;
212 if (match->mask && (match->mask->key.ip.proto == 0xff))
213 mask_allowed |= 1ULL << OVS_KEY_ATTR_SCTP;
214 }
215
216 if (match->key->ip.proto == IPPROTO_TCP) {
217 key_expected |= 1ULL << OVS_KEY_ATTR_TCP;
dc235f7f
JR		 218 key_expected |= 1ULL << OVS_KEY_ATTR_TCP_FLAGS;
219 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
a097c0b2 220 mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP;
dc235f7f
JR		 221 mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP_FLAGS;
222 }
a097c0b2
PS		 223 }
224
225 if (match->key->ip.proto == IPPROTO_ICMPV6) {
226 key_expected |= 1ULL << OVS_KEY_ATTR_ICMPV6;
227 if (match->mask && (match->mask->key.ip.proto == 0xff))
228 mask_allowed |= 1ULL << OVS_KEY_ATTR_ICMPV6;
229
708fb4c5 230 if (match->key->tp.src ==
a097c0b2 231 htons(NDISC_NEIGHBOUR_SOLICITATION) ||
708fb4c5 232 match->key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) {
a097c0b2 233 key_expected |= 1ULL << OVS_KEY_ATTR_ND;
560f3099 234 if (match->mask && (match->mask->key.tp.src == htons(0xff)))
a097c0b2
PS		 235 mask_allowed |= 1ULL << OVS_KEY_ATTR_ND;
236 }
237 }
238 }
239 }
240
241 if ((key_attrs & key_expected) != key_expected) {
242 /* Key attributes check failed. */
243 OVS_NLERR("Missing expected key attributes (key_attrs=%llx, expected=%llx).\n",
29dd5cb7 244 (unsigned long long)key_attrs, (unsigned long long)key_expected);
a097c0b2
PS		 245 return false;
246 }
247
248 if ((mask_attrs & mask_allowed) != mask_attrs) {
249 /* Mask attributes check failed. */
250 OVS_NLERR("Contain more than allowed mask fields (mask_attrs=%llx, mask_allowed=%llx).\n",
29dd5cb7 251 (unsigned long long)mask_attrs, (unsigned long long)mask_allowed);
a097c0b2
PS		 252 return false;
253 }
254
255 return true;
256}
257
258/* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */
259static const int ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = {
260 [OVS_KEY_ATTR_ENCAP] = -1,
261 [OVS_KEY_ATTR_PRIORITY] = sizeof(u32),
262 [OVS_KEY_ATTR_IN_PORT] = sizeof(u32),
263 [OVS_KEY_ATTR_SKB_MARK] = sizeof(u32),
264 [OVS_KEY_ATTR_ETHERNET] = sizeof(struct ovs_key_ethernet),
265 [OVS_KEY_ATTR_VLAN] = sizeof(__be16),
266 [OVS_KEY_ATTR_ETHERTYPE] = sizeof(__be16),
267 [OVS_KEY_ATTR_IPV4] = sizeof(struct ovs_key_ipv4),
268 [OVS_KEY_ATTR_IPV6] = sizeof(struct ovs_key_ipv6),
269 [OVS_KEY_ATTR_TCP] = sizeof(struct ovs_key_tcp),
dc235f7f 270 [OVS_KEY_ATTR_TCP_FLAGS] = sizeof(__be16),
a097c0b2
PS		 271 [OVS_KEY_ATTR_UDP] = sizeof(struct ovs_key_udp),
272 [OVS_KEY_ATTR_SCTP] = sizeof(struct ovs_key_sctp),
273 [OVS_KEY_ATTR_ICMP] = sizeof(struct ovs_key_icmp),
274 [OVS_KEY_ATTR_ICMPV6] = sizeof(struct ovs_key_icmpv6),
275 [OVS_KEY_ATTR_ARP] = sizeof(struct ovs_key_arp),
276 [OVS_KEY_ATTR_ND] = sizeof(struct ovs_key_nd),
7804df20 277 [OVS_KEY_ATTR_DP_HASH] = sizeof(u32),
a6059080 278 [OVS_KEY_ATTR_RECIRC_ID] = sizeof(u32),
a097c0b2 279 [OVS_KEY_ATTR_TUNNEL] = -1,
ccf43786 280 [OVS_KEY_ATTR_MPLS] = sizeof(struct ovs_key_mpls),
a097c0b2
PS		 281};
282
283static bool is_all_zero(const u8 *fp, size_t size)
284{
285 int i;
286
287 if (!fp)
288 return false;
289
290 for (i = 0; i < size; i++)
291 if (fp[i])
292 return false;
293
294 return true;
295}
296
297static int __parse_flow_nlattrs(const struct nlattr *attr,
298 const struct nlattr *a[],
299 u64 *attrsp, bool nz)
300{
301 const struct nlattr *nla;
302 u64 attrs;
303 int rem;
304
305 attrs = *attrsp;
306 nla_for_each_nested(nla, attr, rem) {
307 u16 type = nla_type(nla);
308 int expected_len;
309
310 if (type > OVS_KEY_ATTR_MAX) {
311 OVS_NLERR("Unknown key attribute (type=%d, max=%d).\n",
312 type, OVS_KEY_ATTR_MAX);
313 return -EINVAL;
314 }
315
316 if (attrs & (1ULL << type)) {
317 OVS_NLERR("Duplicate key attribute (type %d).\n", type);
318 return -EINVAL;
319 }
320
321 expected_len = ovs_key_lens[type];
322 if (nla_len(nla) != expected_len && expected_len != -1) {
323 OVS_NLERR("Key attribute has unexpected length (type=%d"
324 ", length=%d, expected=%d).\n", type,
325 nla_len(nla), expected_len);
326 return -EINVAL;
327 }
328
329 if (!nz || !is_all_zero(nla_data(nla), expected_len)) {
330 attrs |= 1ULL << type;
331 a[type] = nla;
332 }
333 }
334 if (rem) {
335 OVS_NLERR("Message has %d unknown bytes.\n", rem);
336 return -EINVAL;
337 }
338
339 *attrsp = attrs;
340 return 0;
341}
342
343static int parse_flow_mask_nlattrs(const struct nlattr *attr,
344 const struct nlattr *a[], u64 *attrsp)
345{
346 return __parse_flow_nlattrs(attr, a, attrsp, true);
347}
348
349static int parse_flow_nlattrs(const struct nlattr *attr,
350 const struct nlattr *a[], u64 *attrsp)
351{
352 return __parse_flow_nlattrs(attr, a, attrsp, false);
353}
354
355static int ipv4_tun_from_nlattr(const struct nlattr *attr,
356 struct sw_flow_match *match, bool is_mask)
357{
358 struct nlattr *a;
359 int rem;
360 bool ttl = false;
361 __be16 tun_flags = 0;
362
363 nla_for_each_nested(a, attr, rem) {
364 int type = nla_type(a);
365 static const u32 ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = {
366 [OVS_TUNNEL_KEY_ATTR_ID] = sizeof(u64),
367 [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = sizeof(u32),
368 [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = sizeof(u32),
369 [OVS_TUNNEL_KEY_ATTR_TOS] = 1,
370 [OVS_TUNNEL_KEY_ATTR_TTL] = 1,
371 [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = 0,
372 [OVS_TUNNEL_KEY_ATTR_CSUM] = 0,
94872594 373 [OVS_TUNNEL_KEY_ATTR_OAM] = 0,
c1fc1411 374 [OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS] = -1,
a097c0b2
PS		 375 };
376
377 if (type > OVS_TUNNEL_KEY_ATTR_MAX) {
378 OVS_NLERR("Unknown IPv4 tunnel attribute (type=%d, max=%d).\n",
379 type, OVS_TUNNEL_KEY_ATTR_MAX);
380 return -EINVAL;
381 }
382
c1fc1411
JG		 383 if (ovs_tunnel_key_lens[type] != nla_len(a) &&
384 ovs_tunnel_key_lens[type] != -1) {
a097c0b2
PS		 385 OVS_NLERR("IPv4 tunnel attribute type has unexpected "
386 " length (type=%d, length=%d, expected=%d).\n",
387 type, nla_len(a), ovs_tunnel_key_lens[type]);
388 return -EINVAL;
389 }
390
391 switch (type) {
392 case OVS_TUNNEL_KEY_ATTR_ID:
393 SW_FLOW_KEY_PUT(match, tun_key.tun_id,
394 nla_get_be64(a), is_mask);
395 tun_flags |= TUNNEL_KEY;
396 break;
397 case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
398 SW_FLOW_KEY_PUT(match, tun_key.ipv4_src,
399 nla_get_be32(a), is_mask);
400 break;
401 case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
402 SW_FLOW_KEY_PUT(match, tun_key.ipv4_dst,
403 nla_get_be32(a), is_mask);
404 break;
405 case OVS_TUNNEL_KEY_ATTR_TOS:
406 SW_FLOW_KEY_PUT(match, tun_key.ipv4_tos,
407 nla_get_u8(a), is_mask);
408 break;
409 case OVS_TUNNEL_KEY_ATTR_TTL:
410 SW_FLOW_KEY_PUT(match, tun_key.ipv4_ttl,
411 nla_get_u8(a), is_mask);
412 ttl = true;
413 break;
414 case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
415 tun_flags |= TUNNEL_DONT_FRAGMENT;
416 break;
417 case OVS_TUNNEL_KEY_ATTR_CSUM:
418 tun_flags |= TUNNEL_CSUM;
419 break;
94872594
JG		 420 case OVS_TUNNEL_KEY_ATTR_OAM:
421 tun_flags |= TUNNEL_OAM;
422 break;
c1fc1411
JG		 423 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
424 if (nla_len(a) > sizeof(match->key->tun_opts)) {
425 OVS_NLERR("Geneve option length exceeds "
426 "maximum size (len %d, max %zu).\n",
427 nla_len(a),
428 sizeof(match->key->tun_opts));
429 return -EINVAL;
430 }
431
432 if (nla_len(a) % 4 != 0) {
433 OVS_NLERR("Geneve option length is not "
434 "a multiple of 4 (len %d).\n",
435 nla_len(a));
436 return -EINVAL;
437 }
438
439 /* We need to record the length of the options passed
440 * down, otherwise packets with the same format but
441 * additional options will be silently matched.
442 */
443 if (!is_mask) {
444 SW_FLOW_KEY_PUT(match, tun_opts_len, nla_len(a),
445 false);
446 } else {
447 /* This is somewhat unusual because it looks at
448 * both the key and mask while parsing the
449 * attributes (and by extension assumes the key
450 * is parsed first). Normally, we would verify
451 * that each is the correct length and that the
452 * attributes line up in the validate function.
453 * However, that is difficult because this is
454 * variable length and we won't have the
455 * information later.
456 */
457 if (match->key->tun_opts_len != nla_len(a)) {
458 OVS_NLERR("Geneve option key length (%d)"
459 " is different from mask length (%d).",
460 match->key->tun_opts_len, nla_len(a));
461 return -EINVAL;
462 }
463
464 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff,
465 true);
466 }
467
468 SW_FLOW_KEY_MEMCPY_OFFSET(match,
469 (unsigned long)GENEVE_OPTS((struct sw_flow_key *)0,
470 nla_len(a)),
471 nla_data(a), nla_len(a), is_mask);
472 break;
a097c0b2 473 default:
a473df5b 474 OVS_NLERR("Unknown IPv4 tunnel attribute (%d).\n", type);
a097c0b2
PS		 475 return -EINVAL;
476 }
477 }
478
479 SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask);
480
481 if (rem > 0) {
482 OVS_NLERR("IPv4 tunnel attribute has %d unknown bytes.\n", rem);
483 return -EINVAL;
484 }
485
486 if (!is_mask) {
487 if (!match->key->tun_key.ipv4_dst) {
488 OVS_NLERR("IPv4 tunnel destination address is zero.\n");
489 return -EINVAL;
490 }
491
492 if (!ttl) {
493 OVS_NLERR("IPv4 tunnel TTL not specified.\n");
494 return -EINVAL;
495 }
496 }
497
498 return 0;
499}
500
501static int ipv4_tun_to_nlattr(struct sk_buff *skb,
c1fc1411
JG		 502 const struct ovs_key_ipv4_tunnel *output,
503 const struct geneve_opt *tun_opts,
504 int swkey_tun_opts_len)
a097c0b2
PS		 505{
506 struct nlattr *nla;
507
508 nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL);
509 if (!nla)
510 return -EMSGSIZE;
511
512 if (output->tun_flags & TUNNEL_KEY &&
513 nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id))
514 return -EMSGSIZE;
515 if (output->ipv4_src &&
516 nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, output->ipv4_src))
517 return -EMSGSIZE;
518 if (output->ipv4_dst &&
519 nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST, output->ipv4_dst))
520 return -EMSGSIZE;
521 if (output->ipv4_tos &&
522 nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->ipv4_tos))
523 return -EMSGSIZE;
524 if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ipv4_ttl))
525 return -EMSGSIZE;
526 if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) &&
527 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT))
528 return -EMSGSIZE;
529 if ((output->tun_flags & TUNNEL_CSUM) &&
530 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM))
531 return -EMSGSIZE;
94872594
JG		 532 if ((output->tun_flags & TUNNEL_OAM) &&
533 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM))
534 return -EMSGSIZE;
c1fc1411
JG		 535 if (tun_opts &&
536 nla_put(skb, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS,
05499369
BP		 537 swkey_tun_opts_len, tun_opts))
538 return -EMSGSIZE;
a097c0b2
PS		 539
540 nla_nest_end(skb, nla);
541 return 0;
542}
543
544
545static int metadata_from_nlattrs(struct sw_flow_match *match, u64 *attrs,
546 const struct nlattr **a, bool is_mask)
547{
7804df20
AZ		 548 if (*attrs & (1ULL << OVS_KEY_ATTR_DP_HASH)) {
549 u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]);
550
551 SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask);
552 *attrs &= ~(1ULL << OVS_KEY_ATTR_DP_HASH);
553 }
554
a6059080
AZ		 555 if (*attrs & (1ULL << OVS_KEY_ATTR_RECIRC_ID)) {
556 u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]);
557
558 SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask);
559 *attrs &= ~(1ULL << OVS_KEY_ATTR_RECIRC_ID);
560 }
561
a097c0b2
PS		 562 if (*attrs & (1ULL << OVS_KEY_ATTR_PRIORITY)) {
563 SW_FLOW_KEY_PUT(match, phy.priority,
564 nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask);
565 *attrs &= ~(1ULL << OVS_KEY_ATTR_PRIORITY);
566 }
567
568 if (*attrs & (1ULL << OVS_KEY_ATTR_IN_PORT)) {
569 u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]);
570
a473df5b 571 if (is_mask) {
a097c0b2 572 in_port = 0xffffffff; /* Always exact match in_port. */
a473df5b
JG		 573 } else if (in_port >= DP_MAX_PORTS) {
574 OVS_NLERR("Input port (%d) exceeds maximum allowable (%d).\n",
575 in_port, DP_MAX_PORTS);
a097c0b2 576 return -EINVAL;
a473df5b 577 }
a097c0b2
PS		 578
579 SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask);
580 *attrs &= ~(1ULL << OVS_KEY_ATTR_IN_PORT);
581 } else if (!is_mask) {
582 SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask);
583 }
584
585 if (*attrs & (1ULL << OVS_KEY_ATTR_SKB_MARK)) {
586 uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]);
587
588 SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask);
589 *attrs &= ~(1ULL << OVS_KEY_ATTR_SKB_MARK);
590 }
591 if (*attrs & (1ULL << OVS_KEY_ATTR_TUNNEL)) {
592 if (ipv4_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match,
593 is_mask))
594 return -EINVAL;
595 *attrs &= ~(1ULL << OVS_KEY_ATTR_TUNNEL);
596 }
597 return 0;
598}
599
df65fec1
JR		 600static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs,
601 const struct nlattr **a, bool is_mask)
a097c0b2
PS		 602{
603 int err;
a097c0b2
PS		 604
605 err = metadata_from_nlattrs(match, &attrs, a, is_mask);
606 if (err)
607 return err;
608
609 if (attrs & (1ULL << OVS_KEY_ATTR_ETHERNET)) {
610 const struct ovs_key_ethernet *eth_key;
611
612 eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]);
613 SW_FLOW_KEY_MEMCPY(match, eth.src,
614 eth_key->eth_src, ETH_ALEN, is_mask);
615 SW_FLOW_KEY_MEMCPY(match, eth.dst,
616 eth_key->eth_dst, ETH_ALEN, is_mask);
617 attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERNET);
618 }
619
620 if (attrs & (1ULL << OVS_KEY_ATTR_VLAN)) {
621 __be16 tci;
622
623 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
624 if (!(tci & htons(VLAN_TAG_PRESENT))) {
625 if (is_mask)
626 OVS_NLERR("VLAN TCI mask does not have exact match for VLAN_TAG_PRESENT bit.\n");
627 else
628 OVS_NLERR("VLAN TCI does not have VLAN_TAG_PRESENT bit set.\n");
629
630 return -EINVAL;
631 }
632
633 SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask);
634 attrs &= ~(1ULL << OVS_KEY_ATTR_VLAN);
635 } else if (!is_mask)
636 SW_FLOW_KEY_PUT(match, eth.tci, htons(0xffff), true);
637
638 if (attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)) {
639 __be16 eth_type;
640
641 eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
642 if (is_mask) {
643 /* Always exact match EtherType. */
644 eth_type = htons(0xffff);
645 } else if (ntohs(eth_type) < ETH_P_802_3_MIN) {
646 OVS_NLERR("EtherType is less than minimum (type=%x, min=%x).\n",
647 ntohs(eth_type), ETH_P_802_3_MIN);
648 return -EINVAL;
649 }
650
651 SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask);
652 attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE);
653 } else if (!is_mask) {
654 SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask);
655 }
656
657 if (attrs & (1ULL << OVS_KEY_ATTR_IPV4)) {
658 const struct ovs_key_ipv4 *ipv4_key;
659
660 ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]);
661 if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) {
662 OVS_NLERR("Unknown IPv4 fragment type (value=%d, max=%d).\n",
663 ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX);
664 return -EINVAL;
665 }
666 SW_FLOW_KEY_PUT(match, ip.proto,
667 ipv4_key->ipv4_proto, is_mask);
668 SW_FLOW_KEY_PUT(match, ip.tos,
669 ipv4_key->ipv4_tos, is_mask);
670 SW_FLOW_KEY_PUT(match, ip.ttl,
671 ipv4_key->ipv4_ttl, is_mask);
672 SW_FLOW_KEY_PUT(match, ip.frag,
673 ipv4_key->ipv4_frag, is_mask);
674 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
675 ipv4_key->ipv4_src, is_mask);
676 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
677 ipv4_key->ipv4_dst, is_mask);
678 attrs &= ~(1ULL << OVS_KEY_ATTR_IPV4);
679 }
680
681 if (attrs & (1ULL << OVS_KEY_ATTR_IPV6)) {
682 const struct ovs_key_ipv6 *ipv6_key;
683
684 ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]);
685 if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) {
686 OVS_NLERR("Unknown IPv6 fragment type (value=%d, max=%d).\n",
687 ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX);
688 return -EINVAL;
689 }
690 SW_FLOW_KEY_PUT(match, ipv6.label,
691 ipv6_key->ipv6_label, is_mask);
692 SW_FLOW_KEY_PUT(match, ip.proto,
693 ipv6_key->ipv6_proto, is_mask);
694 SW_FLOW_KEY_PUT(match, ip.tos,
695 ipv6_key->ipv6_tclass, is_mask);
696 SW_FLOW_KEY_PUT(match, ip.ttl,
697 ipv6_key->ipv6_hlimit, is_mask);
698 SW_FLOW_KEY_PUT(match, ip.frag,
699 ipv6_key->ipv6_frag, is_mask);
700 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src,
701 ipv6_key->ipv6_src,
702 sizeof(match->key->ipv6.addr.src),
703 is_mask);
704 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst,
705 ipv6_key->ipv6_dst,
706 sizeof(match->key->ipv6.addr.dst),
707 is_mask);
708
709 attrs &= ~(1ULL << OVS_KEY_ATTR_IPV6);
710 }
711
712 if (attrs & (1ULL << OVS_KEY_ATTR_ARP)) {
713 const struct ovs_key_arp *arp_key;
714
715 arp_key = nla_data(a[OVS_KEY_ATTR_ARP]);
716 if (!is_mask && (arp_key->arp_op & htons(0xff00))) {
717 OVS_NLERR("Unknown ARP opcode (opcode=%d).\n",
718 arp_key->arp_op);
719 return -EINVAL;
720 }
721
722 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
723 arp_key->arp_sip, is_mask);
724 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
725 arp_key->arp_tip, is_mask);
726 SW_FLOW_KEY_PUT(match, ip.proto,
727 ntohs(arp_key->arp_op), is_mask);
728 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha,
729 arp_key->arp_sha, ETH_ALEN, is_mask);
730 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha,
731 arp_key->arp_tha, ETH_ALEN, is_mask);
732
733 attrs &= ~(1ULL << OVS_KEY_ATTR_ARP);
734 }
735
ccf43786
SH		 736 if (attrs & (1ULL << OVS_KEY_ATTR_MPLS)) {
737 const struct ovs_key_mpls *mpls_key;
738
739 mpls_key = nla_data(a[OVS_KEY_ATTR_MPLS]);
740 SW_FLOW_KEY_PUT(match, mpls.top_lse,
741 mpls_key->mpls_lse, is_mask);
742
743 attrs &= ~(1ULL << OVS_KEY_ATTR_MPLS);
62974663 744 }
ccf43786 745
a097c0b2
PS		 746 if (attrs & (1ULL << OVS_KEY_ATTR_TCP)) {
747 const struct ovs_key_tcp *tcp_key;
748
749 tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]);
708fb4c5
JR		 750 SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask);
751 SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask);
a097c0b2
PS		 752 attrs &= ~(1ULL << OVS_KEY_ATTR_TCP);
753 }
754
dc235f7f 755 if (attrs & (1ULL << OVS_KEY_ATTR_TCP_FLAGS)) {
cab29271
JS		 756 SW_FLOW_KEY_PUT(match, tp.flags,
757 nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]),
758 is_mask);
dc235f7f
JR		 759 attrs &= ~(1ULL << OVS_KEY_ATTR_TCP_FLAGS);
760 }
761
a097c0b2
PS		 762 if (attrs & (1ULL << OVS_KEY_ATTR_UDP)) {
763 const struct ovs_key_udp *udp_key;
764
765 udp_key = nla_data(a[OVS_KEY_ATTR_UDP]);
708fb4c5
JR		 766 SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask);
767 SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask);
a097c0b2
PS		 768 attrs &= ~(1ULL << OVS_KEY_ATTR_UDP);
769 }
770
771 if (attrs & (1ULL << OVS_KEY_ATTR_SCTP)) {
772 const struct ovs_key_sctp *sctp_key;
773
774 sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]);
708fb4c5
JR		 775 SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask);
776 SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask);
a097c0b2
PS		 777 attrs &= ~(1ULL << OVS_KEY_ATTR_SCTP);
778 }
779
780 if (attrs & (1ULL << OVS_KEY_ATTR_ICMP)) {
781 const struct ovs_key_icmp *icmp_key;
782
783 icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]);
708fb4c5 784 SW_FLOW_KEY_PUT(match, tp.src,
a097c0b2 785 htons(icmp_key->icmp_type), is_mask);
708fb4c5 786 SW_FLOW_KEY_PUT(match, tp.dst,
a097c0b2
PS		 787 htons(icmp_key->icmp_code), is_mask);
788 attrs &= ~(1ULL << OVS_KEY_ATTR_ICMP);
789 }
790
791 if (attrs & (1ULL << OVS_KEY_ATTR_ICMPV6)) {
792 const struct ovs_key_icmpv6 *icmpv6_key;
793
794 icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]);
708fb4c5 795 SW_FLOW_KEY_PUT(match, tp.src,
a097c0b2 796 htons(icmpv6_key->icmpv6_type), is_mask);
708fb4c5 797 SW_FLOW_KEY_PUT(match, tp.dst,
a097c0b2
PS		 798 htons(icmpv6_key->icmpv6_code), is_mask);
799 attrs &= ~(1ULL << OVS_KEY_ATTR_ICMPV6);
800 }
801
802 if (attrs & (1ULL << OVS_KEY_ATTR_ND)) {
803 const struct ovs_key_nd *nd_key;
804
805 nd_key = nla_data(a[OVS_KEY_ATTR_ND]);
806 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target,
807 nd_key->nd_target,
808 sizeof(match->key->ipv6.nd.target),
809 is_mask);
810 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll,
811 nd_key->nd_sll, ETH_ALEN, is_mask);
812 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll,
813 nd_key->nd_tll, ETH_ALEN, is_mask);
814 attrs &= ~(1ULL << OVS_KEY_ATTR_ND);
815 }
816
a473df5b
JG		 817 if (attrs != 0) {
818 OVS_NLERR("Unknown key attributes (%llx).\n",
819 (unsigned long long)attrs);
a097c0b2 820 return -EINVAL;
a473df5b 821 }
a097c0b2
PS		 822
823 return 0;
824}
825
62974663 826static void nlattr_set(struct nlattr *attr, u8 val, bool is_attr_mask_key)
a097c0b2 827{
62974663
DDP		 828 struct nlattr *nla;
829 int rem;
a097c0b2 830
62974663
DDP		 831 /* The nlattr stream should already have been validated */
832 nla_for_each_nested(nla, attr, rem) {
833 /* We assume that ovs_key_lens[type] == -1 means that type is a
834 * nested attribute
835 */
836 if (is_attr_mask_key && ovs_key_lens[nla_type(nla)] == -1)
837 nlattr_set(nla, val, false);
838 else
839 memset(nla_data(nla), val, nla_len(nla));
840 }
841}
842
843static void mask_set_nlattr(struct nlattr *attr, u8 val)
844{
845 nlattr_set(attr, val, true);
a097c0b2
PS		 846}
847
848/**
849 * ovs_nla_get_match - parses Netlink attributes into a flow key and
850 * mask. In case the 'mask' is NULL, the flow is treated as exact match
851 * flow. Otherwise, it is treated as a wildcarded flow, except the mask
852 * does not include any don't care bit.
853 * @match: receives the extracted flow match information.
854 * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
855 * sequence. The fields should of the packet that triggered the creation
856 * of this flow.
857 * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink
858 * attribute specifies the mask field of the wildcarded flow.
859 */
860int ovs_nla_get_match(struct sw_flow_match *match,
861 const struct nlattr *key,
862 const struct nlattr *mask)
863{
864 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
865 const struct nlattr *encap;
62974663 866 struct nlattr *newmask = NULL;
a097c0b2
PS		 867 u64 key_attrs = 0;
868 u64 mask_attrs = 0;
869 bool encap_valid = false;
870 int err;
871
872 err = parse_flow_nlattrs(key, a, &key_attrs);
873 if (err)
874 return err;
875
876 if ((key_attrs & (1ULL << OVS_KEY_ATTR_ETHERNET)) &&
877 (key_attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)) &&
878 (nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]) == htons(ETH_P_8021Q))) {
879 __be16 tci;
880
881 if (!((key_attrs & (1ULL << OVS_KEY_ATTR_VLAN)) &&
882 (key_attrs & (1ULL << OVS_KEY_ATTR_ENCAP)))) {
883 OVS_NLERR("Invalid Vlan frame.\n");
884 return -EINVAL;
885 }
886
887 key_attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE);
888 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
889 encap = a[OVS_KEY_ATTR_ENCAP];
890 key_attrs &= ~(1ULL << OVS_KEY_ATTR_ENCAP);
891 encap_valid = true;
892
893 if (tci & htons(VLAN_TAG_PRESENT)) {
894 err = parse_flow_nlattrs(encap, a, &key_attrs);
895 if (err)
896 return err;
897 } else if (!tci) {
898 /* Corner case for truncated 802.1Q header. */
899 if (nla_len(encap)) {
900 OVS_NLERR("Truncated 802.1Q header has non-zero encap attribute.\n");
901 return -EINVAL;
902 }
903 } else {
904 OVS_NLERR("Encap attribute is set for a non-VLAN frame.\n");
905 return -EINVAL;
906 }
907 }
908
df65fec1 909 err = ovs_key_from_nlattrs(match, key_attrs, a, false);
a097c0b2
PS		 910 if (err)
911 return err;
912
62974663
DDP		 913 if (match->mask && !mask) {
914 /* Create an exact match mask. We need to set to 0xff all the
915 * 'match->mask' fields that have been touched in 'match->key'.
916 * We cannot simply memset 'match->mask', because padding bytes
917 * and fields not specified in 'match->key' should be left to 0.
918 * Instead, we use a stream of netlink attributes, copied from
919 * 'key' and set to 0xff: ovs_key_from_nlattrs() will take care
920 * of filling 'match->mask' appropriately.
921 */
922 newmask = kmemdup(key, nla_total_size(nla_len(key)),
923 GFP_KERNEL);
924 if (!newmask)
925 return -ENOMEM;
926
927 mask_set_nlattr(newmask, 0xff);
928
0b496cda
DDP		 929 /* The userspace does not send tunnel attributes that are 0,
930 * but we should not wildcard them nonetheless. */
931 if (match->key->tun_key.ipv4_dst)
932 SW_FLOW_KEY_MEMSET_FIELD(match, tun_key, 0xff, true);
933
62974663
DDP		 934 mask = newmask;
935 }
936
a097c0b2
PS		 937 if (mask) {
938 err = parse_flow_mask_nlattrs(mask, a, &mask_attrs);
939 if (err)
62974663 940 goto free_newmask;
a097c0b2 941
62974663 942 if (mask_attrs & 1ULL << OVS_KEY_ATTR_ENCAP) {
a097c0b2
PS		 943 __be16 eth_type = 0;
944 __be16 tci = 0;
945
946 if (!encap_valid) {
947 OVS_NLERR("Encap mask attribute is set for non-VLAN frame.\n");
62974663
DDP		 948 err = -EINVAL;
949 goto free_newmask;
a097c0b2
PS		 950 }
951
952 mask_attrs &= ~(1ULL << OVS_KEY_ATTR_ENCAP);
953 if (a[OVS_KEY_ATTR_ETHERTYPE])
954 eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
955
956 if (eth_type == htons(0xffff)) {
957 mask_attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE);
958 encap = a[OVS_KEY_ATTR_ENCAP];
959 err = parse_flow_mask_nlattrs(encap, a, &mask_attrs);
3854ab21
AW		 960 if (err)
961 goto free_newmask;
a097c0b2
PS		 962 } else {
963 OVS_NLERR("VLAN frames must have an exact match on the TPID (mask=%x).\n",
964 ntohs(eth_type));
62974663
DDP		 965 err = -EINVAL;
966 goto free_newmask;
a097c0b2
PS		 967 }
968
969 if (a[OVS_KEY_ATTR_VLAN])
970 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
971
972 if (!(tci & htons(VLAN_TAG_PRESENT))) {
973 OVS_NLERR("VLAN tag present bit must have an exact match (tci_mask=%x).\n", ntohs(tci));
62974663
DDP		 974 err = -EINVAL;
975 goto free_newmask;
a097c0b2
PS		 976 }
977 }
978
df65fec1 979 err = ovs_key_from_nlattrs(match, mask_attrs, a, true);
a097c0b2 980 if (err)
62974663 981 goto free_newmask;
a097c0b2
PS		 982 }
983
984 if (!match_validate(match, key_attrs, mask_attrs))
62974663 985 err = -EINVAL;
a097c0b2 986
62974663
DDP		 987free_newmask:
988 kfree(newmask);
989 return err;
a097c0b2
PS		 990}
991
992/**
993 * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key.
994 * @flow: Receives extracted in_port, priority, tun_key and skb_mark.
995 * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
996 * sequence.
997 *
998 * This parses a series of Netlink attributes that form a flow key, which must
999 * take the same form accepted by flow_from_nlattrs(), but only enough of it to
1000 * get the metadata, that is, the parts of the flow key that cannot be
1001 * extracted from the packet itself.
1002 */
1003
1004int ovs_nla_get_flow_metadata(struct sw_flow *flow,
1005 const struct nlattr *attr)
1006{
1007 struct ovs_key_ipv4_tunnel *tun_key = &flow->key.tun_key;
1008 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
1009 u64 attrs = 0;
1010 int err;
1011 struct sw_flow_match match;
1012
1013 flow->key.phy.in_port = DP_MAX_PORTS;
1014 flow->key.phy.priority = 0;
1015 flow->key.phy.skb_mark = 0;
7804df20 1016 flow->key.ovs_flow_hash = 0;
a6059080 1017 flow->key.recirc_id = 0;
a097c0b2
PS		 1018 memset(tun_key, 0, sizeof(flow->key.tun_key));
1019
1020 err = parse_flow_nlattrs(attr, a, &attrs);
1021 if (err)
1022 return -EINVAL;
1023
1024 memset(&match, 0, sizeof(match));
1025 match.key = &flow->key;
1026
1027 err = metadata_from_nlattrs(&match, &attrs, a, false);
1028 if (err)
1029 return err;
1030
1031 return 0;
1032}
1033
c1fc1411 1034int ovs_nla_put_flow(struct datapath *dp, const struct sw_flow_key *swkey,
a097c0b2
PS		 1035 const struct sw_flow_key *output, struct sk_buff *skb)
1036{
1037 struct ovs_key_ethernet *eth_key;
1038 struct nlattr *nla, *encap;
1039 bool is_mask = (swkey != output);
1040
7804df20
AZ		 1041 if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash))
1042 goto nla_put_failure;
1043
a6059080
AZ		 1044 if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id))
1045 goto nla_put_failure;
1046
a097c0b2
PS		 1047 if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority))
1048 goto nla_put_failure;
1049
c1fc1411
JG		 1050 if ((swkey->tun_key.ipv4_dst || is_mask)) {
1051 const struct geneve_opt *opts = NULL;
1052
1053 if (!is_mask) {
1054 struct vport *in_port;
1055
1056 in_port = ovs_vport_ovsl_rcu(dp, swkey->phy.in_port);
1057 if (in_port->ops->type == OVS_VPORT_TYPE_GENEVE)
1058 opts = GENEVE_OPTS(output, swkey->tun_opts_len);
1059 } else {
1060 if (output->tun_opts_len)
1061 opts = GENEVE_OPTS(output, swkey->tun_opts_len);
1062 }
1063
1064 if (ipv4_tun_to_nlattr(skb, &output->tun_key, opts,
1065 swkey->tun_opts_len))
1066 goto nla_put_failure;
1067 }
a097c0b2
PS		 1068
1069 if (swkey->phy.in_port == DP_MAX_PORTS) {
1070 if (is_mask && (output->phy.in_port == 0xffff))
1071 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff))
1072 goto nla_put_failure;
1073 } else {
1074 u16 upper_u16;
1075 upper_u16 = !is_mask ? 0 : 0xffff;
1076
1077 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT,
1078 (upper_u16 << 16) | output->phy.in_port))
1079 goto nla_put_failure;
1080 }
1081
1082 if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark))
1083 goto nla_put_failure;
1084
1085 nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key));
1086 if (!nla)
1087 goto nla_put_failure;
1088
1089 eth_key = nla_data(nla);
982a47ec
JP		 1090 ether_addr_copy(eth_key->eth_src, output->eth.src);
1091 ether_addr_copy(eth_key->eth_dst, output->eth.dst);
a097c0b2
PS		 1092
1093 if (swkey->eth.tci || swkey->eth.type == htons(ETH_P_8021Q)) {
1094 __be16 eth_type;
1095 eth_type = !is_mask ? htons(ETH_P_8021Q) : htons(0xffff);
1096 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) ||
1097 nla_put_be16(skb, OVS_KEY_ATTR_VLAN, output->eth.tci))
1098 goto nla_put_failure;
1099 encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
1100 if (!swkey->eth.tci)
1101 goto unencap;
1102 } else
1103 encap = NULL;
1104
1105 if (swkey->eth.type == htons(ETH_P_802_2)) {
1106 /*
1107 * Ethertype 802.2 is represented in the netlink with omitted
1108 * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and
1109 * 0xffff in the mask attribute. Ethertype can also
1110 * be wildcarded.
1111 */
1112 if (is_mask && output->eth.type)
1113 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE,
1114 output->eth.type))
1115 goto nla_put_failure;
1116 goto unencap;
1117 }
1118
1119 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type))
1120 goto nla_put_failure;
1121
1122 if (swkey->eth.type == htons(ETH_P_IP)) {
1123 struct ovs_key_ipv4 *ipv4_key;
1124
1125 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key));
1126 if (!nla)
1127 goto nla_put_failure;
1128 ipv4_key = nla_data(nla);
1129 ipv4_key->ipv4_src = output->ipv4.addr.src;
1130 ipv4_key->ipv4_dst = output->ipv4.addr.dst;
1131 ipv4_key->ipv4_proto = output->ip.proto;
1132 ipv4_key->ipv4_tos = output->ip.tos;
1133 ipv4_key->ipv4_ttl = output->ip.ttl;
1134 ipv4_key->ipv4_frag = output->ip.frag;
1135 } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
1136 struct ovs_key_ipv6 *ipv6_key;
1137
1138 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key));
1139 if (!nla)
1140 goto nla_put_failure;
1141 ipv6_key = nla_data(nla);
1142 memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src,
1143 sizeof(ipv6_key->ipv6_src));
1144 memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst,
1145 sizeof(ipv6_key->ipv6_dst));
1146 ipv6_key->ipv6_label = output->ipv6.label;
1147 ipv6_key->ipv6_proto = output->ip.proto;
1148 ipv6_key->ipv6_tclass = output->ip.tos;
1149 ipv6_key->ipv6_hlimit = output->ip.ttl;
1150 ipv6_key->ipv6_frag = output->ip.frag;
1151 } else if (swkey->eth.type == htons(ETH_P_ARP) ||
1152 swkey->eth.type == htons(ETH_P_RARP)) {
1153 struct ovs_key_arp *arp_key;
1154
1155 nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key));
1156 if (!nla)
1157 goto nla_put_failure;
1158 arp_key = nla_data(nla);
1159 memset(arp_key, 0, sizeof(struct ovs_key_arp));
1160 arp_key->arp_sip = output->ipv4.addr.src;
1161 arp_key->arp_tip = output->ipv4.addr.dst;
1162 arp_key->arp_op = htons(output->ip.proto);
982a47ec
JP		 1163 ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha);
1164 ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha);
ccf43786
SH		 1165 } else if (eth_p_mpls(swkey->eth.type)) {
1166 struct ovs_key_mpls *mpls_key;
1167
1168 nla = nla_reserve(skb, OVS_KEY_ATTR_MPLS, sizeof(*mpls_key));
1169 if (!nla)
1170 goto nla_put_failure;
1171 mpls_key = nla_data(nla);
1172 mpls_key->mpls_lse = output->mpls.top_lse;
a097c0b2
PS		 1173 }
1174
1175 if ((swkey->eth.type == htons(ETH_P_IP) ||
1176 swkey->eth.type == htons(ETH_P_IPV6)) &&
1177 swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
1178
1179 if (swkey->ip.proto == IPPROTO_TCP) {
1180 struct ovs_key_tcp *tcp_key;
1181
1182 nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key));
1183 if (!nla)
1184 goto nla_put_failure;
1185 tcp_key = nla_data(nla);
708fb4c5
JR		 1186 tcp_key->tcp_src = output->tp.src;
1187 tcp_key->tcp_dst = output->tp.dst;
1188 if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS,
1189 output->tp.flags))
1190 goto nla_put_failure;
a097c0b2
PS		 1191 } else if (swkey->ip.proto == IPPROTO_UDP) {
1192 struct ovs_key_udp *udp_key;
1193
1194 nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key));
1195 if (!nla)
1196 goto nla_put_failure;
1197 udp_key = nla_data(nla);
708fb4c5
JR		 1198 udp_key->udp_src = output->tp.src;
1199 udp_key->udp_dst = output->tp.dst;
a097c0b2
PS		 1200 } else if (swkey->ip.proto == IPPROTO_SCTP) {
1201 struct ovs_key_sctp *sctp_key;
1202
1203 nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key));
1204 if (!nla)
1205 goto nla_put_failure;
1206 sctp_key = nla_data(nla);
708fb4c5
JR		 1207 sctp_key->sctp_src = output->tp.src;
1208 sctp_key->sctp_dst = output->tp.dst;
a097c0b2
PS		 1209 } else if (swkey->eth.type == htons(ETH_P_IP) &&
1210 swkey->ip.proto == IPPROTO_ICMP) {
1211 struct ovs_key_icmp *icmp_key;
1212
1213 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key));
1214 if (!nla)
1215 goto nla_put_failure;
1216 icmp_key = nla_data(nla);
708fb4c5
JR		 1217 icmp_key->icmp_type = ntohs(output->tp.src);
1218 icmp_key->icmp_code = ntohs(output->tp.dst);
a097c0b2
PS		 1219 } else if (swkey->eth.type == htons(ETH_P_IPV6) &&
1220 swkey->ip.proto == IPPROTO_ICMPV6) {
1221 struct ovs_key_icmpv6 *icmpv6_key;
1222
1223 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6,
1224 sizeof(*icmpv6_key));
1225 if (!nla)
1226 goto nla_put_failure;
1227 icmpv6_key = nla_data(nla);
708fb4c5
JR		 1228 icmpv6_key->icmpv6_type = ntohs(output->tp.src);
1229 icmpv6_key->icmpv6_code = ntohs(output->tp.dst);
a097c0b2
PS		 1230
1231 if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION ||
1232 icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) {
1233 struct ovs_key_nd *nd_key;
1234
1235 nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key));
1236 if (!nla)
1237 goto nla_put_failure;
1238 nd_key = nla_data(nla);
1239 memcpy(nd_key->nd_target, &output->ipv6.nd.target,
1240 sizeof(nd_key->nd_target));
982a47ec
JP		 1241 ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll);
1242 ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll);
a097c0b2
PS		 1243 }
1244 }
1245 }
1246
1247unencap:
1248 if (encap)
1249 nla_nest_end(skb, encap);
1250
1251 return 0;
1252
1253nla_put_failure:
1254 return -EMSGSIZE;
1255}
1256
1257#define MAX_ACTIONS_BUFSIZE (32 * 1024)
1258
1259struct sw_flow_actions *ovs_nla_alloc_flow_actions(int size)
1260{
1261 struct sw_flow_actions *sfa;
1262
a473df5b
JG		 1263 if (size > MAX_ACTIONS_BUFSIZE) {
1264 OVS_NLERR("Flow action size (%u bytes) exceeds maximum "
1265 "(%u bytes)\n", size, MAX_ACTIONS_BUFSIZE);
a097c0b2 1266 return ERR_PTR(-EINVAL);
a473df5b 1267 }
a097c0b2
PS		 1268
1269 sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL);
1270 if (!sfa)
1271 return ERR_PTR(-ENOMEM);
1272
1273 sfa->actions_len = 0;
1274 return sfa;
1275}
1276
1277/* RCU callback used by ovs_nla_free_flow_actions. */
1278static void rcu_free_acts_callback(struct rcu_head *rcu)
1279{
1280 struct sw_flow_actions *sf_acts = container_of(rcu,
1281 struct sw_flow_actions, rcu);
1282 kfree(sf_acts);
1283}
1284
1285/* Schedules 'sf_acts' to be freed after the next RCU grace period.
1286 * The caller must hold rcu_read_lock for this to be sensible. */
1287void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts)
1288{
1289 call_rcu(&sf_acts->rcu, rcu_free_acts_callback);
1290}
1291
1292static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa,
1293 int attr_len)
1294{
1295
1296 struct sw_flow_actions *acts;
1297 int new_acts_size;
1298 int req_size = NLA_ALIGN(attr_len);
1299 int next_offset = offsetof(struct sw_flow_actions, actions) +
1300 (*sfa)->actions_len;
1301
1302 if (req_size <= (ksize(*sfa) - next_offset))
1303 goto out;
1304
1305 new_acts_size = ksize(*sfa) * 2;
1306
1307 if (new_acts_size > MAX_ACTIONS_BUFSIZE) {
1308 if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size)
1309 return ERR_PTR(-EMSGSIZE);
1310 new_acts_size = MAX_ACTIONS_BUFSIZE;
1311 }
1312
1313 acts = ovs_nla_alloc_flow_actions(new_acts_size);
1314 if (IS_ERR(acts))
1315 return (void *)acts;
1316
1317 memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len);
1318 acts->actions_len = (*sfa)->actions_len;
1319 kfree(*sfa);
1320 *sfa = acts;
1321
1322out:
1323 (*sfa)->actions_len += req_size;
1324 return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset);
1325}
1326
f0cd669f
JG		 1327static struct nlattr *__add_action(struct sw_flow_actions **sfa, int attrtype,
1328 void *data, int len)
a097c0b2
PS		 1329{
1330 struct nlattr *a;
1331
1332 a = reserve_sfa_size(sfa, nla_attr_size(len));
1333 if (IS_ERR(a))
f0cd669f 1334 return a;
a097c0b2
PS		 1335
1336 a->nla_type = attrtype;
1337 a->nla_len = nla_attr_size(len);
1338
1339 if (data)
1340 memcpy(nla_data(a), data, len);
1341 memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len));
1342
f0cd669f
JG		 1343 return a;
1344}
1345
1346static int add_action(struct sw_flow_actions **sfa, int attrtype,
1347 void *data, int len)
1348{
1349 struct nlattr *a;
1350
1351 a = __add_action(sfa, attrtype, data, len);
1352 if (IS_ERR(a))
1353 return PTR_ERR(a);
1354
a097c0b2
PS		 1355 return 0;
1356}
1357
1358static inline int add_nested_action_start(struct sw_flow_actions **sfa,
1359 int attrtype)
1360{
1361 int used = (*sfa)->actions_len;
1362 int err;
1363
1364 err = add_action(sfa, attrtype, NULL, 0);
1365 if (err)
1366 return err;
1367
1368 return used;
1369}
1370
1371static inline void add_nested_action_end(struct sw_flow_actions *sfa,
1372 int st_offset)
1373{
1374 struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions +
1375 st_offset);
1376
1377 a->nla_len = sfa->actions_len - st_offset;
1378}
1379
ccf43786
SH		 1380static int ovs_nla_copy_actions__(const struct nlattr *attr,
1381 const struct sw_flow_key *key,
1382 int depth, struct sw_flow_actions **sfa,
1383 __be16 eth_type, __be16 vlan_tci);
1384
a097c0b2
PS		 1385static int validate_and_copy_sample(const struct nlattr *attr,
1386 const struct sw_flow_key *key, int depth,
ccf43786
SH		 1387 struct sw_flow_actions **sfa,
1388 __be16 eth_type, __be16 vlan_tci)
a097c0b2
PS		 1389{
1390 const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];
1391 const struct nlattr *probability, *actions;
1392 const struct nlattr *a;
1393 int rem, start, err, st_acts;
1394
1395 memset(attrs, 0, sizeof(attrs));
1396 nla_for_each_nested(a, attr, rem) {
1397 int type = nla_type(a);
1398 if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type])
1399 return -EINVAL;
1400 attrs[type] = a;
1401 }
1402 if (rem)
1403 return -EINVAL;
1404
1405 probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY];
1406 if (!probability || nla_len(probability) != sizeof(u32))
1407 return -EINVAL;
1408
1409 actions = attrs[OVS_SAMPLE_ATTR_ACTIONS];
1410 if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN))
1411 return -EINVAL;
1412
1413 /* validation done, copy sample action. */
1414 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE);
1415 if (start < 0)
1416 return start;
1417 err = add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY,
1418 nla_data(probability), sizeof(u32));
1419 if (err)
1420 return err;
1421 st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS);
1422 if (st_acts < 0)
1423 return st_acts;
1424
ccf43786
SH		 1425 err = ovs_nla_copy_actions__(actions, key, depth + 1, sfa,
1426 eth_type, vlan_tci);
a097c0b2
PS		 1427 if (err)
1428 return err;
1429
1430 add_nested_action_end(*sfa, st_acts);
1431 add_nested_action_end(*sfa, start);
1432
1433 return 0;
1434}
1435
ccf43786
SH		 1436static int validate_tp_port(const struct sw_flow_key *flow_key,
1437 __be16 eth_type)
a097c0b2 1438{
ccf43786 1439 if ((eth_type == htons(ETH_P_IP) || eth_type == htons(ETH_P_IPV6)) &&
708fb4c5
JR		 1440 (flow_key->tp.src || flow_key->tp.dst))
1441 return 0;
a097c0b2
PS		 1442
1443 return -EINVAL;
1444}
1445
1446void ovs_match_init(struct sw_flow_match *match,
1447 struct sw_flow_key *key,
1448 struct sw_flow_mask *mask)
1449{
1450 memset(match, 0, sizeof(*match));
1451 match->key = key;
1452 match->mask = mask;
1453
1454 memset(key, 0, sizeof(*key));
1455
1456 if (mask) {
1457 memset(&mask->key, 0, sizeof(mask->key));
1458 mask->range.start = mask->range.end = 0;
1459 }
1460}
1461
1462static int validate_and_copy_set_tun(const struct nlattr *attr,
1463 struct sw_flow_actions **sfa)
1464{
1465 struct sw_flow_match match;
1466 struct sw_flow_key key;
f0cd669f
JG		 1467 struct ovs_tunnel_info *tun_info;
1468 struct nlattr *a;
a097c0b2
PS		 1469 int err, start;
1470
1471 ovs_match_init(&match, &key, NULL);
1472 err = ipv4_tun_from_nlattr(nla_data(attr), &match, false);
1473 if (err)
1474 return err;
1475
c1fc1411
JG		 1476 if (key.tun_opts_len) {
1477 struct geneve_opt *option = GENEVE_OPTS(&key,
1478 key.tun_opts_len);
1479 int opts_len = key.tun_opts_len;
1480 bool crit_opt = false;
1481
1482 while (opts_len > 0) {
1483 int len;
1484
1485 if (opts_len < sizeof(*option))
1486 return -EINVAL;
1487
1488 len = sizeof(*option) + option->length * 4;
1489 if (len > opts_len)
1490 return -EINVAL;
1491
1492 crit_opt |= !!(option->type & GENEVE_CRIT_OPT_TYPE);
1493
1494 option = (struct geneve_opt *)((u8 *)option + len);
1495 opts_len -= len;
1496 };
1497
1498 key.tun_key.tun_flags |= crit_opt ? TUNNEL_CRIT_OPT : 0;
1499 };
1500
a097c0b2
PS		 1501 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET);
1502 if (start < 0)
1503 return start;
1504
f0cd669f 1505 a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL,
c1fc1411 1506 sizeof(*tun_info) + key.tun_opts_len);
f0cd669f
JG		 1507 if (IS_ERR(a))
1508 return PTR_ERR(a);
1509
1510 tun_info = nla_data(a);
1511 tun_info->tunnel = key.tun_key;
c1fc1411
JG		 1512 tun_info->options_len = key.tun_opts_len;
1513
1514 if (tun_info->options_len) {
1515 /* We need to store the options in the action itself since
1516 * everything else will go away after flow setup. We can append
1517 * it to tun_info and then point there.
1518 */
1519 tun_info->options = (struct geneve_opt *)(tun_info + 1);
1520 memcpy(tun_info->options, GENEVE_OPTS(&key, key.tun_opts_len),
1521 key.tun_opts_len);
1522 } else {
1523 tun_info->options = NULL;
1524 }
f0cd669f 1525
a097c0b2
PS		 1526 add_nested_action_end(*sfa, start);
1527
1528 return err;
1529}
1530
1531static int validate_set(const struct nlattr *a,
1532 const struct sw_flow_key *flow_key,
1533 struct sw_flow_actions **sfa,
ccf43786 1534 bool *set_tun, __be16 eth_type)
a097c0b2
PS		 1535{
1536 const struct nlattr *ovs_key = nla_data(a);
1537 int key_type = nla_type(ovs_key);
1538
1539 /* There can be only one key in a action */
1540 if (nla_total_size(nla_len(ovs_key)) != nla_len(a))
1541 return -EINVAL;
1542
1543 if (key_type > OVS_KEY_ATTR_MAX ||
1544 (ovs_key_lens[key_type] != nla_len(ovs_key) &&
1545 ovs_key_lens[key_type] != -1))
1546 return -EINVAL;
1547
1548 switch (key_type) {
1549 const struct ovs_key_ipv4 *ipv4_key;
1550 const struct ovs_key_ipv6 *ipv6_key;
1551 int err;
1552
1553 case OVS_KEY_ATTR_PRIORITY:
1554 case OVS_KEY_ATTR_SKB_MARK:
1555 case OVS_KEY_ATTR_ETHERNET:
1556 break;
1557
1558 case OVS_KEY_ATTR_TUNNEL:
1559 *set_tun = true;
1560 err = validate_and_copy_set_tun(a, sfa);
1561 if (err)
1562 return err;
1563 break;
1564
1565 case OVS_KEY_ATTR_IPV4:
ccf43786 1566 if (eth_type != htons(ETH_P_IP))
a097c0b2
PS		 1567 return -EINVAL;
1568
1569 if (!flow_key->ip.proto)
1570 return -EINVAL;
1571
1572 ipv4_key = nla_data(ovs_key);
1573 if (ipv4_key->ipv4_proto != flow_key->ip.proto)
1574 return -EINVAL;
1575
1576 if (ipv4_key->ipv4_frag != flow_key->ip.frag)
1577 return -EINVAL;
1578
1579 break;
1580
1581 case OVS_KEY_ATTR_IPV6:
ccf43786 1582 if (eth_type != htons(ETH_P_IPV6))
a097c0b2
PS		 1583 return -EINVAL;
1584
1585 if (!flow_key->ip.proto)
1586 return -EINVAL;
1587
1588 ipv6_key = nla_data(ovs_key);
1589 if (ipv6_key->ipv6_proto != flow_key->ip.proto)
1590 return -EINVAL;
1591
1592 if (ipv6_key->ipv6_frag != flow_key->ip.frag)
1593 return -EINVAL;
1594
1595 if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000)
1596 return -EINVAL;
1597
1598 break;
1599
1600 case OVS_KEY_ATTR_TCP:
1601 if (flow_key->ip.proto != IPPROTO_TCP)
1602 return -EINVAL;
1603
ccf43786 1604 return validate_tp_port(flow_key, eth_type);
a097c0b2
PS		 1605
1606 case OVS_KEY_ATTR_UDP:
1607 if (flow_key->ip.proto != IPPROTO_UDP)
1608 return -EINVAL;
1609
ccf43786
SH		 1610 return validate_tp_port(flow_key, eth_type);
1611
1612 case OVS_KEY_ATTR_MPLS:
1613 if (!eth_p_mpls(eth_type))
1614 return -EINVAL;
1615 break;
a097c0b2
PS		 1616
1617 case OVS_KEY_ATTR_SCTP:
1618 if (flow_key->ip.proto != IPPROTO_SCTP)
1619 return -EINVAL;
1620
ccf43786 1621 return validate_tp_port(flow_key, eth_type);
a097c0b2
PS		 1622
1623 default:
1624 return -EINVAL;
1625 }
1626
1627 return 0;
1628}
1629
1630static int validate_userspace(const struct nlattr *attr)
1631{
1632 static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = {
1633 [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 },
1634 [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC },
1635 };
1636 struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];
1637 int error;
1638
1639 error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX,
1640 attr, userspace_policy);
1641 if (error)
1642 return error;
1643
1644 if (!a[OVS_USERSPACE_ATTR_PID] ||
1645 !nla_get_u32(a[OVS_USERSPACE_ATTR_PID]))
1646 return -EINVAL;
1647
1648 return 0;
1649}
1650
1651static int copy_action(const struct nlattr *from,
1652 struct sw_flow_actions **sfa)
1653{
1654 int totlen = NLA_ALIGN(from->nla_len);
1655 struct nlattr *to;
1656
1657 to = reserve_sfa_size(sfa, from->nla_len);
1658 if (IS_ERR(to))
1659 return PTR_ERR(to);
1660
1661 memcpy(to, from, totlen);
1662 return 0;
1663}
1664
ccf43786
SH		 1665static int ovs_nla_copy_actions__(const struct nlattr *attr,
1666 const struct sw_flow_key *key,
1667 int depth, struct sw_flow_actions **sfa,
1668 __be16 eth_type, __be16 vlan_tci)
a097c0b2
PS		 1669{
1670 const struct nlattr *a;
1671 int rem, err;
1672
1673 if (depth >= SAMPLE_ACTION_DEPTH)
1674 return -EOVERFLOW;
1675
1676 nla_for_each_nested(a, attr, rem) {
1677 /* Expected argument lengths, (u32)-1 for variable length. */
1678 static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {
1679 [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32),
a6059080 1680 [OVS_ACTION_ATTR_RECIRC] = sizeof(u32),
a097c0b2 1681 [OVS_ACTION_ATTR_USERSPACE] = (u32)-1,
ccf43786
SH		 1682 [OVS_ACTION_ATTR_PUSH_MPLS] = sizeof(struct ovs_action_push_mpls),
1683 [OVS_ACTION_ATTR_POP_MPLS] = sizeof(__be16),
a097c0b2
PS		 1684 [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan),
1685 [OVS_ACTION_ATTR_POP_VLAN] = 0,
1686 [OVS_ACTION_ATTR_SET] = (u32)-1,
7804df20
AZ		 1687 [OVS_ACTION_ATTR_SAMPLE] = (u32)-1,
1688 [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash)
a097c0b2
PS		 1689 };
1690 const struct ovs_action_push_vlan *vlan;
1691 int type = nla_type(a);
1692 bool skip_copy;
1693
1694 if (type > OVS_ACTION_ATTR_MAX ||
1695 (action_lens[type] != nla_len(a) &&
1696 action_lens[type] != (u32)-1))
1697 return -EINVAL;
1698
1699 skip_copy = false;
1700 switch (type) {
1701 case OVS_ACTION_ATTR_UNSPEC:
1702 return -EINVAL;
1703
1704 case OVS_ACTION_ATTR_USERSPACE:
1705 err = validate_userspace(a);
1706 if (err)
1707 return err;
1708 break;
1709
1710 case OVS_ACTION_ATTR_OUTPUT:
1711 if (nla_get_u32(a) >= DP_MAX_PORTS)
1712 return -EINVAL;
1713 break;
1714
7804df20
AZ		 1715 case OVS_ACTION_ATTR_HASH: {
1716 const struct ovs_action_hash *act_hash = nla_data(a);
1717
1718 switch (act_hash->hash_alg) {
1719 case OVS_HASH_ALG_L4:
1720 break;
1721 default:
1722 return -EINVAL;
1723 }
1724
1725 break;
1726 }
a097c0b2
PS		 1727
1728 case OVS_ACTION_ATTR_POP_VLAN:
e0b8f73f 1729 vlan_tci = htons(0);
a097c0b2
PS		 1730 break;
1731
1732 case OVS_ACTION_ATTR_PUSH_VLAN:
1733 vlan = nla_data(a);
1734 if (vlan->vlan_tpid != htons(ETH_P_8021Q))
1735 return -EINVAL;
1736 if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT)))
1737 return -EINVAL;
ccf43786 1738 vlan_tci = vlan->vlan_tci;
a097c0b2
PS		 1739 break;
1740
a6059080
AZ		 1741 case OVS_ACTION_ATTR_RECIRC:
1742 break;
1743
ccf43786
SH		 1744 case OVS_ACTION_ATTR_PUSH_MPLS: {
1745 const struct ovs_action_push_mpls *mpls = nla_data(a);
1746
1747 if (!eth_p_mpls(mpls->mpls_ethertype))
1748 return -EINVAL;
1749 /* Prohibit push MPLS other than to a white list
1750 * for packets that have a known tag order.
e0b8f73f 1751 */
ccf43786
SH		 1752 if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
1753 (eth_type != htons(ETH_P_IP) &&
1754 eth_type != htons(ETH_P_IPV6) &&
1755 eth_type != htons(ETH_P_ARP) &&
1756 eth_type != htons(ETH_P_RARP) &&
1757 !eth_p_mpls(eth_type)))
1758 return -EINVAL;
1759 eth_type = mpls->mpls_ethertype;
1760 break;
1761 }
1762
1763 case OVS_ACTION_ATTR_POP_MPLS:
1764 if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
1765 !eth_p_mpls(eth_type))
1766 return -EINVAL;
1767
1768 /* Disallow subsequent L2.5+ set and mpls_pop actions
1769 * as there is no check here to ensure that the new
1770 * eth_type is valid and thus set actions could
1771 * write off the end of the packet or otherwise
1772 * corrupt it.
1773 *
1774 * Support for these actions is planned using packet
1775 * recirculation.
1776 */
1777 eth_type = htons(0);
1778 break;
1779
a097c0b2 1780 case OVS_ACTION_ATTR_SET:
ccf43786 1781 err = validate_set(a, key, sfa, &skip_copy, eth_type);
a097c0b2
PS		 1782 if (err)
1783 return err;
1784 break;
1785
1786 case OVS_ACTION_ATTR_SAMPLE:
ccf43786
SH		 1787 err = validate_and_copy_sample(a, key, depth, sfa,
1788 eth_type, vlan_tci);
a097c0b2
PS		 1789 if (err)
1790 return err;
1791 skip_copy = true;
1792 break;
1793
1794 default:
1795 return -EINVAL;
1796 }
1797 if (!skip_copy) {
1798 err = copy_action(a, sfa);
1799 if (err)
1800 return err;
1801 }
1802 }
1803
1804 if (rem > 0)
1805 return -EINVAL;
1806
1807 return 0;
1808}
1809
ccf43786
SH		 1810int ovs_nla_copy_actions(const struct nlattr *attr,
1811 const struct sw_flow_key *key,
1812 struct sw_flow_actions **sfa)
1813{
1814 return ovs_nla_copy_actions__(attr, key, 0, sfa, key->eth.type,
1815 key->eth.tci);
1816}
1817
a097c0b2
PS		 1818static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb)
1819{
1820 const struct nlattr *a;
1821 struct nlattr *start;
1822 int err = 0, rem;
1823
1824 start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE);
1825 if (!start)
1826 return -EMSGSIZE;
1827
1828 nla_for_each_nested(a, attr, rem) {
1829 int type = nla_type(a);
1830 struct nlattr *st_sample;
1831
1832 switch (type) {
1833 case OVS_SAMPLE_ATTR_PROBABILITY:
1834 if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY,
1835 sizeof(u32), nla_data(a)))
1836 return -EMSGSIZE;
1837 break;
1838 case OVS_SAMPLE_ATTR_ACTIONS:
1839 st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS);
1840 if (!st_sample)
1841 return -EMSGSIZE;
1842 err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb);
1843 if (err)
1844 return err;
1845 nla_nest_end(skb, st_sample);
1846 break;
1847 }
1848 }
1849
1850 nla_nest_end(skb, start);
1851 return err;
1852}
1853
1854static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb)
1855{
1856 const struct nlattr *ovs_key = nla_data(a);
1857 int key_type = nla_type(ovs_key);
1858 struct nlattr *start;
1859 int err;
1860
1861 switch (key_type) {
f0cd669f
JG		 1862 case OVS_KEY_ATTR_TUNNEL_INFO: {
1863 struct ovs_tunnel_info *tun_info = nla_data(ovs_key);
1864
a097c0b2
PS		 1865 start = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
1866 if (!start)
1867 return -EMSGSIZE;
1868
f0cd669f 1869 err = ipv4_tun_to_nlattr(skb, &tun_info->tunnel,
c1fc1411
JG		 1870 tun_info->options_len ?
1871 tun_info->options : NULL,
1872 tun_info->options_len);
a097c0b2
PS		 1873 if (err)
1874 return err;
1875 nla_nest_end(skb, start);
1876 break;
f0cd669f 1877 }
a097c0b2
PS		 1878 default:
1879 if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key))
1880 return -EMSGSIZE;
1881 break;
1882 }
1883
1884 return 0;
1885}
1886
1887int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb)
1888{
1889 const struct nlattr *a;
1890 int rem, err;
1891
1892 nla_for_each_attr(a, attr, len, rem) {
1893 int type = nla_type(a);
1894
1895 switch (type) {
1896 case OVS_ACTION_ATTR_SET:
1897 err = set_action_to_attr(a, skb);
1898 if (err)
1899 return err;
1900 break;
1901
1902 case OVS_ACTION_ATTR_SAMPLE:
1903 err = sample_action_to_attr(a, skb);
1904 if (err)
1905 return err;
1906 break;
1907 default:
1908 if (nla_put(skb, type, nla_len(a), nla_data(a)))
1909 return -EMSGSIZE;
1910 break;
1911 }
1912 }
1913
1914 return 0;
1915}
openvswitch packages for PVE