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netfilter: connlabels: Export setting connlabel length
[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>
25cd9ba0 49#include <net/mpls.h>
614732ea 50#include <net/vxlan.h>
e6445719
PS		 51
52#include "flow_netlink.h"
53
81bfe3c3
TG		 54struct ovs_len_tbl {
55 int len;
56 const struct ovs_len_tbl *next;
57};
58
59#define OVS_ATTR_NESTED -1
60
a85311bf
PS		 61static void update_range(struct sw_flow_match *match,
62 size_t offset, size_t size, bool is_mask)
e6445719 63{
a85311bf 64 struct sw_flow_key_range *range;
e6445719
PS		 65 size_t start = rounddown(offset, sizeof(long));
66 size_t end = roundup(offset + size, sizeof(long));
67
68 if (!is_mask)
69 range = &match->range;
a85311bf 70 else
e6445719
PS		 71 range = &match->mask->range;
72
e6445719
PS		 73 if (range->start == range->end) {
74 range->start = start;
75 range->end = end;
76 return;
77 }
78
79 if (range->start > start)
80 range->start = start;
81
82 if (range->end < end)
83 range->end = end;
84}
85
86#define SW_FLOW_KEY_PUT(match, field, value, is_mask) \
87 do { \
a85311bf
PS		 88 update_range(match, offsetof(struct sw_flow_key, field), \
89 sizeof((match)->key->field), is_mask); \
90 if (is_mask) \
91 (match)->mask->key.field = value; \
92 else \
e6445719 93 (match)->key->field = value; \
e6445719
PS		 94 } while (0)
95
f5796684
JG		 96#define SW_FLOW_KEY_MEMCPY_OFFSET(match, offset, value_p, len, is_mask) \
97 do { \
a85311bf 98 update_range(match, offset, len, is_mask); \
f5796684
JG		 99 if (is_mask) \
100 memcpy((u8 *)&(match)->mask->key + offset, value_p, \
a85311bf 101 len); \
f5796684
JG		 102 else \
103 memcpy((u8 *)(match)->key + offset, value_p, len); \
e6445719
PS		 104 } while (0)
105
f5796684
JG		 106#define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \
107 SW_FLOW_KEY_MEMCPY_OFFSET(match, offsetof(struct sw_flow_key, field), \
108 value_p, len, is_mask)
109
a85311bf
PS		 110#define SW_FLOW_KEY_MEMSET_FIELD(match, field, value, is_mask) \
111 do { \
112 update_range(match, offsetof(struct sw_flow_key, field), \
113 sizeof((match)->key->field), is_mask); \
114 if (is_mask) \
115 memset((u8 *)&(match)->mask->key.field, value, \
116 sizeof((match)->mask->key.field)); \
117 else \
f47de068
PS		 118 memset((u8 *)&(match)->key->field, value, \
119 sizeof((match)->key->field)); \
f47de068 120 } while (0)
e6445719
PS		 121
122static bool match_validate(const struct sw_flow_match *match,
05da5898 123 u64 key_attrs, u64 mask_attrs, bool log)
e6445719
PS		 124{
125 u64 key_expected = 1 << OVS_KEY_ATTR_ETHERNET;
126 u64 mask_allowed = key_attrs; /* At most allow all key attributes */
127
128 /* The following mask attributes allowed only if they
129 * pass the validation tests. */
130 mask_allowed &= ~((1 << OVS_KEY_ATTR_IPV4)
131 | (1 << OVS_KEY_ATTR_IPV6)
132 | (1 << OVS_KEY_ATTR_TCP)
5eb26b15 133 | (1 << OVS_KEY_ATTR_TCP_FLAGS)
e6445719
PS		 134 | (1 << OVS_KEY_ATTR_UDP)
135 | (1 << OVS_KEY_ATTR_SCTP)
136 | (1 << OVS_KEY_ATTR_ICMP)
137 | (1 << OVS_KEY_ATTR_ICMPV6)
138 | (1 << OVS_KEY_ATTR_ARP)
25cd9ba0
SH		 139 | (1 << OVS_KEY_ATTR_ND)
140 | (1 << OVS_KEY_ATTR_MPLS));
e6445719
PS		 141
142 /* Always allowed mask fields. */
143 mask_allowed |= ((1 << OVS_KEY_ATTR_TUNNEL)
144 | (1 << OVS_KEY_ATTR_IN_PORT)
145 | (1 << OVS_KEY_ATTR_ETHERTYPE));
146
147 /* Check key attributes. */
148 if (match->key->eth.type == htons(ETH_P_ARP)
149 || match->key->eth.type == htons(ETH_P_RARP)) {
150 key_expected |= 1 << OVS_KEY_ATTR_ARP;
f2a01517 151 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
e6445719
PS		 152 mask_allowed |= 1 << OVS_KEY_ATTR_ARP;
153 }
154
25cd9ba0
SH		 155 if (eth_p_mpls(match->key->eth.type)) {
156 key_expected |= 1 << OVS_KEY_ATTR_MPLS;
157 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
158 mask_allowed |= 1 << OVS_KEY_ATTR_MPLS;
159 }
160
e6445719
PS		 161 if (match->key->eth.type == htons(ETH_P_IP)) {
162 key_expected |= 1 << OVS_KEY_ATTR_IPV4;
163 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
164 mask_allowed |= 1 << OVS_KEY_ATTR_IPV4;
165
166 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
167 if (match->key->ip.proto == IPPROTO_UDP) {
168 key_expected |= 1 << OVS_KEY_ATTR_UDP;
169 if (match->mask && (match->mask->key.ip.proto == 0xff))
170 mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
171 }
172
173 if (match->key->ip.proto == IPPROTO_SCTP) {
174 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
175 if (match->mask && (match->mask->key.ip.proto == 0xff))
176 mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
177 }
178
179 if (match->key->ip.proto == IPPROTO_TCP) {
180 key_expected |= 1 << OVS_KEY_ATTR_TCP;
5eb26b15
JR		 181 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
182 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
e6445719 183 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
5eb26b15
JR		 184 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
185 }
e6445719
PS		 186 }
187
188 if (match->key->ip.proto == IPPROTO_ICMP) {
189 key_expected |= 1 << OVS_KEY_ATTR_ICMP;
190 if (match->mask && (match->mask->key.ip.proto == 0xff))
191 mask_allowed |= 1 << OVS_KEY_ATTR_ICMP;
192 }
193 }
194 }
195
196 if (match->key->eth.type == htons(ETH_P_IPV6)) {
197 key_expected |= 1 << OVS_KEY_ATTR_IPV6;
198 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
199 mask_allowed |= 1 << OVS_KEY_ATTR_IPV6;
200
201 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
202 if (match->key->ip.proto == IPPROTO_UDP) {
203 key_expected |= 1 << OVS_KEY_ATTR_UDP;
204 if (match->mask && (match->mask->key.ip.proto == 0xff))
205 mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
206 }
207
208 if (match->key->ip.proto == IPPROTO_SCTP) {
209 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
210 if (match->mask && (match->mask->key.ip.proto == 0xff))
211 mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
212 }
213
214 if (match->key->ip.proto == IPPROTO_TCP) {
215 key_expected |= 1 << OVS_KEY_ATTR_TCP;
5eb26b15
JR		 216 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
217 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
e6445719 218 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
5eb26b15
JR		 219 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
220 }
e6445719
PS		 221 }
222
223 if (match->key->ip.proto == IPPROTO_ICMPV6) {
224 key_expected |= 1 << OVS_KEY_ATTR_ICMPV6;
225 if (match->mask && (match->mask->key.ip.proto == 0xff))
226 mask_allowed |= 1 << OVS_KEY_ATTR_ICMPV6;
227
1139e241 228 if (match->key->tp.src ==
e6445719 229 htons(NDISC_NEIGHBOUR_SOLICITATION) ||
1139e241 230 match->key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) {
e6445719 231 key_expected |= 1 << OVS_KEY_ATTR_ND;
f2a01517 232 if (match->mask && (match->mask->key.tp.src == htons(0xff)))
e6445719
PS		 233 mask_allowed |= 1 << OVS_KEY_ATTR_ND;
234 }
235 }
236 }
237 }
238
239 if ((key_attrs & key_expected) != key_expected) {
240 /* Key attributes check failed. */
05da5898
JR		 241 OVS_NLERR(log, "Missing key (keys=%llx, expected=%llx)",
242 (unsigned long long)key_attrs,
243 (unsigned long long)key_expected);
e6445719
PS		 244 return false;
245 }
246
247 if ((mask_attrs & mask_allowed) != mask_attrs) {
248 /* Mask attributes check failed. */
05da5898
JR		 249 OVS_NLERR(log, "Unexpected mask (mask=%llx, allowed=%llx)",
250 (unsigned long long)mask_attrs,
251 (unsigned long long)mask_allowed);
e6445719
PS		 252 return false;
253 }
254
255 return true;
256}
257
8f0aad6f
WZ		 258size_t ovs_tun_key_attr_size(void)
259{
260 /* Whenever adding new OVS_TUNNEL_KEY_ FIELDS, we should consider
261 * updating this function.
262 */
263 return nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */
264 + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_SRC */
265 + nla_total_size(4) /* OVS_TUNNEL_KEY_ATTR_IPV4_DST */
266 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */
267 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */
268 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */
269 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */
270 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_OAM */
271 + nla_total_size(256) /* OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS */
1dd144cf
TG		 272 /* OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS is mutually exclusive with
273 * OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS and covered by it.
274 */
8f0aad6f
WZ		 275 + nla_total_size(2) /* OVS_TUNNEL_KEY_ATTR_TP_SRC */
276 + nla_total_size(2); /* OVS_TUNNEL_KEY_ATTR_TP_DST */
277}
278
41af73e9
JS		 279size_t ovs_key_attr_size(void)
280{
281 /* Whenever adding new OVS_KEY_ FIELDS, we should consider
282 * updating this function.
283 */
182e3042 284 BUILD_BUG_ON(OVS_KEY_ATTR_TUNNEL_INFO != 25);
41af73e9
JS		 285
286 return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */
287 + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */
8f0aad6f 288 + ovs_tun_key_attr_size()
41af73e9
JS		 289 + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */
290 + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */
291 + nla_total_size(4) /* OVS_KEY_ATTR_DP_HASH */
292 + nla_total_size(4) /* OVS_KEY_ATTR_RECIRC_ID */
7f8a436e
JS		 293 + nla_total_size(1) /* OVS_KEY_ATTR_CT_STATE */
294 + nla_total_size(2) /* OVS_KEY_ATTR_CT_ZONE */
182e3042 295 + nla_total_size(4) /* OVS_KEY_ATTR_CT_MARK */
41af73e9
JS		 296 + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */
297 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
298 + nla_total_size(4) /* OVS_KEY_ATTR_VLAN */
299 + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */
300 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
301 + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */
302 + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */
303 + nla_total_size(28); /* OVS_KEY_ATTR_ND */
304}
305
81bfe3c3
TG		 306static const struct ovs_len_tbl ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = {
307 [OVS_TUNNEL_KEY_ATTR_ID] = { .len = sizeof(u64) },
308 [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = { .len = sizeof(u32) },
309 [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = { .len = sizeof(u32) },
310 [OVS_TUNNEL_KEY_ATTR_TOS] = { .len = 1 },
311 [OVS_TUNNEL_KEY_ATTR_TTL] = { .len = 1 },
312 [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = { .len = 0 },
313 [OVS_TUNNEL_KEY_ATTR_CSUM] = { .len = 0 },
314 [OVS_TUNNEL_KEY_ATTR_TP_SRC] = { .len = sizeof(u16) },
315 [OVS_TUNNEL_KEY_ATTR_TP_DST] = { .len = sizeof(u16) },
316 [OVS_TUNNEL_KEY_ATTR_OAM] = { .len = 0 },
317 [OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS] = { .len = OVS_ATTR_NESTED },
1dd144cf 318 [OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS] = { .len = OVS_ATTR_NESTED },
81bfe3c3
TG		 319};
320
e6445719 321/* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */
81bfe3c3
TG		 322static const struct ovs_len_tbl ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = {
323 [OVS_KEY_ATTR_ENCAP] = { .len = OVS_ATTR_NESTED },
324 [OVS_KEY_ATTR_PRIORITY] = { .len = sizeof(u32) },
325 [OVS_KEY_ATTR_IN_PORT] = { .len = sizeof(u32) },
326 [OVS_KEY_ATTR_SKB_MARK] = { .len = sizeof(u32) },
327 [OVS_KEY_ATTR_ETHERNET] = { .len = sizeof(struct ovs_key_ethernet) },
328 [OVS_KEY_ATTR_VLAN] = { .len = sizeof(__be16) },
329 [OVS_KEY_ATTR_ETHERTYPE] = { .len = sizeof(__be16) },
330 [OVS_KEY_ATTR_IPV4] = { .len = sizeof(struct ovs_key_ipv4) },
331 [OVS_KEY_ATTR_IPV6] = { .len = sizeof(struct ovs_key_ipv6) },
332 [OVS_KEY_ATTR_TCP] = { .len = sizeof(struct ovs_key_tcp) },
333 [OVS_KEY_ATTR_TCP_FLAGS] = { .len = sizeof(__be16) },
334 [OVS_KEY_ATTR_UDP] = { .len = sizeof(struct ovs_key_udp) },
335 [OVS_KEY_ATTR_SCTP] = { .len = sizeof(struct ovs_key_sctp) },
336 [OVS_KEY_ATTR_ICMP] = { .len = sizeof(struct ovs_key_icmp) },
337 [OVS_KEY_ATTR_ICMPV6] = { .len = sizeof(struct ovs_key_icmpv6) },
338 [OVS_KEY_ATTR_ARP] = { .len = sizeof(struct ovs_key_arp) },
339 [OVS_KEY_ATTR_ND] = { .len = sizeof(struct ovs_key_nd) },
340 [OVS_KEY_ATTR_RECIRC_ID] = { .len = sizeof(u32) },
341 [OVS_KEY_ATTR_DP_HASH] = { .len = sizeof(u32) },
342 [OVS_KEY_ATTR_TUNNEL] = { .len = OVS_ATTR_NESTED,
343 .next = ovs_tunnel_key_lens, },
344 [OVS_KEY_ATTR_MPLS] = { .len = sizeof(struct ovs_key_mpls) },
7f8a436e
JS		 345 [OVS_KEY_ATTR_CT_STATE] = { .len = sizeof(u8) },
346 [OVS_KEY_ATTR_CT_ZONE] = { .len = sizeof(u16) },
182e3042 347 [OVS_KEY_ATTR_CT_MARK] = { .len = sizeof(u32) },
e6445719
PS		 348};
349
350static bool is_all_zero(const u8 *fp, size_t size)
351{
352 int i;
353
354 if (!fp)
355 return false;
356
357 for (i = 0; i < size; i++)
358 if (fp[i])
359 return false;
360
361 return true;
362}
363
364static int __parse_flow_nlattrs(const struct nlattr *attr,
365 const struct nlattr *a[],
05da5898 366 u64 *attrsp, bool log, bool nz)
e6445719
PS		 367{
368 const struct nlattr *nla;
369 u64 attrs;
370 int rem;
371
372 attrs = *attrsp;
373 nla_for_each_nested(nla, attr, rem) {
374 u16 type = nla_type(nla);
375 int expected_len;
376
377 if (type > OVS_KEY_ATTR_MAX) {
05da5898 378 OVS_NLERR(log, "Key type %d is out of range max %d",
e6445719
PS		 379 type, OVS_KEY_ATTR_MAX);
380 return -EINVAL;
381 }
382
383 if (attrs & (1 << type)) {
05da5898 384 OVS_NLERR(log, "Duplicate key (type %d).", type);
e6445719
PS		 385 return -EINVAL;
386 }
387
81bfe3c3
TG		 388 expected_len = ovs_key_lens[type].len;
389 if (nla_len(nla) != expected_len && expected_len != OVS_ATTR_NESTED) {
05da5898
JR		 390 OVS_NLERR(log, "Key %d has unexpected len %d expected %d",
391 type, nla_len(nla), expected_len);
e6445719
PS		 392 return -EINVAL;
393 }
394
395 if (!nz || !is_all_zero(nla_data(nla), expected_len)) {
396 attrs |= 1 << type;
397 a[type] = nla;
398 }
399 }
400 if (rem) {
05da5898 401 OVS_NLERR(log, "Message has %d unknown bytes.", rem);
e6445719
PS		 402 return -EINVAL;
403 }
404
405 *attrsp = attrs;
406 return 0;
407}
408
409static int parse_flow_mask_nlattrs(const struct nlattr *attr,
05da5898
JR		 410 const struct nlattr *a[], u64 *attrsp,
411 bool log)
e6445719 412{
05da5898 413 return __parse_flow_nlattrs(attr, a, attrsp, log, true);
e6445719
PS		 414}
415
416static int parse_flow_nlattrs(const struct nlattr *attr,
05da5898
JR		 417 const struct nlattr *a[], u64 *attrsp,
418 bool log)
e6445719 419{
05da5898
JR		 420 return __parse_flow_nlattrs(attr, a, attrsp, log, false);
421}
422
423static int genev_tun_opt_from_nlattr(const struct nlattr *a,
424 struct sw_flow_match *match, bool is_mask,
425 bool log)
426{
427 unsigned long opt_key_offset;
428
429 if (nla_len(a) > sizeof(match->key->tun_opts)) {
430 OVS_NLERR(log, "Geneve option length err (len %d, max %zu).",
431 nla_len(a), sizeof(match->key->tun_opts));
432 return -EINVAL;
433 }
434
435 if (nla_len(a) % 4 != 0) {
436 OVS_NLERR(log, "Geneve opt len %d is not a multiple of 4.",
437 nla_len(a));
438 return -EINVAL;
439 }
440
441 /* We need to record the length of the options passed
442 * down, otherwise packets with the same format but
443 * additional options will be silently matched.
444 */
445 if (!is_mask) {
446 SW_FLOW_KEY_PUT(match, tun_opts_len, nla_len(a),
447 false);
448 } else {
449 /* This is somewhat unusual because it looks at
450 * both the key and mask while parsing the
451 * attributes (and by extension assumes the key
452 * is parsed first). Normally, we would verify
453 * that each is the correct length and that the
454 * attributes line up in the validate function.
455 * However, that is difficult because this is
456 * variable length and we won't have the
457 * information later.
458 */
459 if (match->key->tun_opts_len != nla_len(a)) {
460 OVS_NLERR(log, "Geneve option len %d != mask len %d",
461 match->key->tun_opts_len, nla_len(a));
462 return -EINVAL;
463 }
464
465 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
466 }
467
d91641d9 468 opt_key_offset = TUN_METADATA_OFFSET(nla_len(a));
05da5898
JR		 469 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, nla_data(a),
470 nla_len(a), is_mask);
471 return 0;
e6445719
PS		 472}
473
1dd144cf
TG		 474static const struct nla_policy vxlan_opt_policy[OVS_VXLAN_EXT_MAX + 1] = {
475 [OVS_VXLAN_EXT_GBP] = { .type = NLA_U32 },
476};
477
478static int vxlan_tun_opt_from_nlattr(const struct nlattr *a,
479 struct sw_flow_match *match, bool is_mask,
480 bool log)
481{
482 struct nlattr *tb[OVS_VXLAN_EXT_MAX+1];
483 unsigned long opt_key_offset;
614732ea 484 struct vxlan_metadata opts;
1dd144cf
TG		 485 int err;
486
487 BUILD_BUG_ON(sizeof(opts) > sizeof(match->key->tun_opts));
488
489 err = nla_parse_nested(tb, OVS_VXLAN_EXT_MAX, a, vxlan_opt_policy);
490 if (err < 0)
491 return err;
492
493 memset(&opts, 0, sizeof(opts));
494
495 if (tb[OVS_VXLAN_EXT_GBP])
496 opts.gbp = nla_get_u32(tb[OVS_VXLAN_EXT_GBP]);
497
498 if (!is_mask)
499 SW_FLOW_KEY_PUT(match, tun_opts_len, sizeof(opts), false);
500 else
501 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
502
503 opt_key_offset = TUN_METADATA_OFFSET(sizeof(opts));
504 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, &opts, sizeof(opts),
505 is_mask);
506 return 0;
507}
508
e6445719 509static int ipv4_tun_from_nlattr(const struct nlattr *attr,
05da5898
JR		 510 struct sw_flow_match *match, bool is_mask,
511 bool log)
e6445719
PS		 512{
513 struct nlattr *a;
514 int rem;
515 bool ttl = false;
516 __be16 tun_flags = 0;
1dd144cf 517 int opts_type = 0;
e6445719
PS		 518
519 nla_for_each_nested(a, attr, rem) {
520 int type = nla_type(a);
05da5898
JR		 521 int err;
522
e6445719 523 if (type > OVS_TUNNEL_KEY_ATTR_MAX) {
05da5898
JR		 524 OVS_NLERR(log, "Tunnel attr %d out of range max %d",
525 type, OVS_TUNNEL_KEY_ATTR_MAX);
e6445719
PS		 526 return -EINVAL;
527 }
528
81bfe3c3
TG		 529 if (ovs_tunnel_key_lens[type].len != nla_len(a) &&
530 ovs_tunnel_key_lens[type].len != OVS_ATTR_NESTED) {
05da5898 531 OVS_NLERR(log, "Tunnel attr %d has unexpected len %d expected %d",
81bfe3c3 532 type, nla_len(a), ovs_tunnel_key_lens[type].len);
e6445719
PS		 533 return -EINVAL;
534 }
535
536 switch (type) {
537 case OVS_TUNNEL_KEY_ATTR_ID:
538 SW_FLOW_KEY_PUT(match, tun_key.tun_id,
539 nla_get_be64(a), is_mask);
540 tun_flags |= TUNNEL_KEY;
541 break;
542 case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
c1ea5d67 543 SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.src,
67b61f6c 544 nla_get_in_addr(a), is_mask);
e6445719
PS		 545 break;
546 case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
c1ea5d67 547 SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.dst,
67b61f6c 548 nla_get_in_addr(a), is_mask);
e6445719
PS		 549 break;
550 case OVS_TUNNEL_KEY_ATTR_TOS:
7c383fb2 551 SW_FLOW_KEY_PUT(match, tun_key.tos,
e6445719
PS		 552 nla_get_u8(a), is_mask);
553 break;
554 case OVS_TUNNEL_KEY_ATTR_TTL:
7c383fb2 555 SW_FLOW_KEY_PUT(match, tun_key.ttl,
e6445719
PS		 556 nla_get_u8(a), is_mask);
557 ttl = true;
558 break;
559 case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
560 tun_flags |= TUNNEL_DONT_FRAGMENT;
561 break;
562 case OVS_TUNNEL_KEY_ATTR_CSUM:
563 tun_flags |= TUNNEL_CSUM;
564 break;
8f0aad6f
WZ		 565 case OVS_TUNNEL_KEY_ATTR_TP_SRC:
566 SW_FLOW_KEY_PUT(match, tun_key.tp_src,
567 nla_get_be16(a), is_mask);
568 break;
569 case OVS_TUNNEL_KEY_ATTR_TP_DST:
570 SW_FLOW_KEY_PUT(match, tun_key.tp_dst,
571 nla_get_be16(a), is_mask);
572 break;
67fa0341
JG		 573 case OVS_TUNNEL_KEY_ATTR_OAM:
574 tun_flags |= TUNNEL_OAM;
575 break;
f5796684 576 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
1dd144cf
TG		 577 if (opts_type) {
578 OVS_NLERR(log, "Multiple metadata blocks provided");
579 return -EINVAL;
580 }
581
05da5898
JR		 582 err = genev_tun_opt_from_nlattr(a, match, is_mask, log);
583 if (err)
584 return err;
f5796684 585
1dd144cf
TG		 586 tun_flags |= TUNNEL_GENEVE_OPT;
587 opts_type = type;
588 break;
589 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
590 if (opts_type) {
591 OVS_NLERR(log, "Multiple metadata blocks provided");
592 return -EINVAL;
593 }
594
595 err = vxlan_tun_opt_from_nlattr(a, match, is_mask, log);
596 if (err)
597 return err;
598
599 tun_flags |= TUNNEL_VXLAN_OPT;
600 opts_type = type;
f5796684 601 break;
e6445719 602 default:
05da5898 603 OVS_NLERR(log, "Unknown IPv4 tunnel attribute %d",
f5796684 604 type);
e6445719
PS		 605 return -EINVAL;
606 }
607 }
608
609 SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask);
610
611 if (rem > 0) {
05da5898
JR		 612 OVS_NLERR(log, "IPv4 tunnel attribute has %d unknown bytes.",
613 rem);
e6445719
PS		 614 return -EINVAL;
615 }
616
617 if (!is_mask) {
c1ea5d67 618 if (!match->key->tun_key.u.ipv4.dst) {
05da5898 619 OVS_NLERR(log, "IPv4 tunnel dst address is zero");
e6445719
PS		 620 return -EINVAL;
621 }
622
623 if (!ttl) {
05da5898 624 OVS_NLERR(log, "IPv4 tunnel TTL not specified.");
e6445719
PS		 625 return -EINVAL;
626 }
627 }
628
1dd144cf
TG		 629 return opts_type;
630}
631
632static int vxlan_opt_to_nlattr(struct sk_buff *skb,
633 const void *tun_opts, int swkey_tun_opts_len)
634{
614732ea 635 const struct vxlan_metadata *opts = tun_opts;
1dd144cf
TG		 636 struct nlattr *nla;
637
638 nla = nla_nest_start(skb, OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS);
639 if (!nla)
640 return -EMSGSIZE;
641
642 if (nla_put_u32(skb, OVS_VXLAN_EXT_GBP, opts->gbp) < 0)
643 return -EMSGSIZE;
644
645 nla_nest_end(skb, nla);
e6445719
PS		 646 return 0;
647}
648
f5796684 649static int __ipv4_tun_to_nlattr(struct sk_buff *skb,
1d8fff90 650 const struct ip_tunnel_key *output,
d91641d9 651 const void *tun_opts, int swkey_tun_opts_len)
e6445719 652{
e6445719
PS		 653 if (output->tun_flags & TUNNEL_KEY &&
654 nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id))
655 return -EMSGSIZE;
c1ea5d67 656 if (output->u.ipv4.src &&
930345ea 657 nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC,
c1ea5d67 658 output->u.ipv4.src))
e6445719 659 return -EMSGSIZE;
c1ea5d67 660 if (output->u.ipv4.dst &&
930345ea 661 nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST,
c1ea5d67 662 output->u.ipv4.dst))
e6445719 663 return -EMSGSIZE;
7c383fb2
JB		 664 if (output->tos &&
665 nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->tos))
e6445719 666 return -EMSGSIZE;
7c383fb2 667 if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ttl))
e6445719
PS		 668 return -EMSGSIZE;
669 if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) &&
67fa0341 670 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT))
e6445719
PS		 671 return -EMSGSIZE;
672 if ((output->tun_flags & TUNNEL_CSUM) &&
67fa0341
JG		 673 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM))
674 return -EMSGSIZE;
8f0aad6f
WZ		 675 if (output->tp_src &&
676 nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_SRC, output->tp_src))
677 return -EMSGSIZE;
678 if (output->tp_dst &&
679 nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_DST, output->tp_dst))
680 return -EMSGSIZE;
67fa0341
JG		 681 if ((output->tun_flags & TUNNEL_OAM) &&
682 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM))
e6445719 683 return -EMSGSIZE;
1dd144cf
TG		 684 if (tun_opts) {
685 if (output->tun_flags & TUNNEL_GENEVE_OPT &&
686 nla_put(skb, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS,
687 swkey_tun_opts_len, tun_opts))
688 return -EMSGSIZE;
689 else if (output->tun_flags & TUNNEL_VXLAN_OPT &&
690 vxlan_opt_to_nlattr(skb, tun_opts, swkey_tun_opts_len))
691 return -EMSGSIZE;
692 }
e6445719 693
e6445719
PS		 694 return 0;
695}
696
f5796684 697static int ipv4_tun_to_nlattr(struct sk_buff *skb,
1d8fff90 698 const struct ip_tunnel_key *output,
d91641d9 699 const void *tun_opts, int swkey_tun_opts_len)
f5796684
JG		 700{
701 struct nlattr *nla;
702 int err;
703
704 nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL);
705 if (!nla)
706 return -EMSGSIZE;
707
708 err = __ipv4_tun_to_nlattr(skb, output, tun_opts, swkey_tun_opts_len);
709 if (err)
710 return err;
711
712 nla_nest_end(skb, nla);
713 return 0;
714}
715
8f0aad6f 716int ovs_nla_put_egress_tunnel_key(struct sk_buff *skb,
1d8fff90 717 const struct ip_tunnel_info *egress_tun_info)
8f0aad6f 718{
1d8fff90 719 return __ipv4_tun_to_nlattr(skb, &egress_tun_info->key,
8f0aad6f
WZ		 720 egress_tun_info->options,
721 egress_tun_info->options_len);
722}
723
e6445719 724static int metadata_from_nlattrs(struct sw_flow_match *match, u64 *attrs,
05da5898
JR		 725 const struct nlattr **a, bool is_mask,
726 bool log)
e6445719 727{
971427f3
AZ		 728 if (*attrs & (1 << OVS_KEY_ATTR_DP_HASH)) {
729 u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]);
730
731 SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask);
732 *attrs &= ~(1 << OVS_KEY_ATTR_DP_HASH);
733 }
734
735 if (*attrs & (1 << OVS_KEY_ATTR_RECIRC_ID)) {
736 u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]);
737
738 SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask);
739 *attrs &= ~(1 << OVS_KEY_ATTR_RECIRC_ID);
740 }
741
e6445719
PS		 742 if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) {
743 SW_FLOW_KEY_PUT(match, phy.priority,
744 nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask);
745 *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY);
746 }
747
748 if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) {
749 u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]);
750
426cda5c 751 if (is_mask) {
e6445719 752 in_port = 0xffffffff; /* Always exact match in_port. */
426cda5c 753 } else if (in_port >= DP_MAX_PORTS) {
05da5898 754 OVS_NLERR(log, "Port %d exceeds max allowable %d",
426cda5c 755 in_port, DP_MAX_PORTS);
e6445719 756 return -EINVAL;
426cda5c 757 }
e6445719
PS		 758
759 SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask);
760 *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT);
761 } else if (!is_mask) {
762 SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask);
763 }
764
765 if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) {
766 uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]);
767
768 SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask);
769 *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK);
770 }
771 if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) {
772 if (ipv4_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match,
1dd144cf 773 is_mask, log) < 0)
e6445719
PS		 774 return -EINVAL;
775 *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL);
776 }
7f8a436e
JS		 777
778 if (*attrs & (1 << OVS_KEY_ATTR_CT_STATE) &&
779 ovs_ct_verify(OVS_KEY_ATTR_CT_STATE)) {
780 u8 ct_state = nla_get_u8(a[OVS_KEY_ATTR_CT_STATE]);
781
782 SW_FLOW_KEY_PUT(match, ct.state, ct_state, is_mask);
783 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_STATE);
784 }
785 if (*attrs & (1 << OVS_KEY_ATTR_CT_ZONE) &&
786 ovs_ct_verify(OVS_KEY_ATTR_CT_ZONE)) {
787 u16 ct_zone = nla_get_u16(a[OVS_KEY_ATTR_CT_ZONE]);
788
789 SW_FLOW_KEY_PUT(match, ct.zone, ct_zone, is_mask);
790 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ZONE);
791 }
182e3042
JS		 792 if (*attrs & (1 << OVS_KEY_ATTR_CT_MARK) &&
793 ovs_ct_verify(OVS_KEY_ATTR_CT_MARK)) {
794 u32 mark = nla_get_u32(a[OVS_KEY_ATTR_CT_MARK]);
795
796 SW_FLOW_KEY_PUT(match, ct.mark, mark, is_mask);
797 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_MARK);
798 }
e6445719
PS		 799 return 0;
800}
801
23dabf88 802static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs,
05da5898
JR		 803 const struct nlattr **a, bool is_mask,
804 bool log)
e6445719
PS		 805{
806 int err;
e6445719 807
05da5898 808 err = metadata_from_nlattrs(match, &attrs, a, is_mask, log);
e6445719
PS		 809 if (err)
810 return err;
811
812 if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) {
813 const struct ovs_key_ethernet *eth_key;
814
815 eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]);
816 SW_FLOW_KEY_MEMCPY(match, eth.src,
817 eth_key->eth_src, ETH_ALEN, is_mask);
818 SW_FLOW_KEY_MEMCPY(match, eth.dst,
819 eth_key->eth_dst, ETH_ALEN, is_mask);
820 attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET);
821 }
822
823 if (attrs & (1 << OVS_KEY_ATTR_VLAN)) {
824 __be16 tci;
825
826 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
827 if (!(tci & htons(VLAN_TAG_PRESENT))) {
828 if (is_mask)
05da5898 829 OVS_NLERR(log, "VLAN TCI mask does not have exact match for VLAN_TAG_PRESENT bit.");
e6445719 830 else
05da5898 831 OVS_NLERR(log, "VLAN TCI does not have VLAN_TAG_PRESENT bit set.");
e6445719
PS		 832
833 return -EINVAL;
834 }
835
836 SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask);
837 attrs &= ~(1 << OVS_KEY_ATTR_VLAN);
a85311bf 838 }
e6445719
PS		 839
840 if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) {
841 __be16 eth_type;
842
843 eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
844 if (is_mask) {
845 /* Always exact match EtherType. */
846 eth_type = htons(0xffff);
6713fc9b 847 } else if (!eth_proto_is_802_3(eth_type)) {
05da5898
JR		 848 OVS_NLERR(log, "EtherType %x is less than min %x",
849 ntohs(eth_type), ETH_P_802_3_MIN);
e6445719
PS		 850 return -EINVAL;
851 }
852
853 SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask);
854 attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
855 } else if (!is_mask) {
856 SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask);
857 }
858
859 if (attrs & (1 << OVS_KEY_ATTR_IPV4)) {
860 const struct ovs_key_ipv4 *ipv4_key;
861
862 ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]);
863 if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) {
05da5898
JR		 864 OVS_NLERR(log, "IPv4 frag type %d is out of range max %d",
865 ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX);
e6445719
PS		 866 return -EINVAL;
867 }
868 SW_FLOW_KEY_PUT(match, ip.proto,
869 ipv4_key->ipv4_proto, is_mask);
870 SW_FLOW_KEY_PUT(match, ip.tos,
871 ipv4_key->ipv4_tos, is_mask);
872 SW_FLOW_KEY_PUT(match, ip.ttl,
873 ipv4_key->ipv4_ttl, is_mask);
874 SW_FLOW_KEY_PUT(match, ip.frag,
875 ipv4_key->ipv4_frag, is_mask);
876 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
877 ipv4_key->ipv4_src, is_mask);
878 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
879 ipv4_key->ipv4_dst, is_mask);
880 attrs &= ~(1 << OVS_KEY_ATTR_IPV4);
881 }
882
883 if (attrs & (1 << OVS_KEY_ATTR_IPV6)) {
884 const struct ovs_key_ipv6 *ipv6_key;
885
886 ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]);
887 if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) {
05da5898
JR		 888 OVS_NLERR(log, "IPv6 frag type %d is out of range max %d",
889 ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX);
e6445719
PS		 890 return -EINVAL;
891 }
fecaef85 892
d3052bb5 893 if (!is_mask && ipv6_key->ipv6_label & htonl(0xFFF00000)) {
14591433 894 OVS_NLERR(log, "IPv6 flow label %x is out of range (max=%x).\n",
fecaef85
JR		 895 ntohl(ipv6_key->ipv6_label), (1 << 20) - 1);
896 return -EINVAL;
897 }
898
e6445719
PS		 899 SW_FLOW_KEY_PUT(match, ipv6.label,
900 ipv6_key->ipv6_label, is_mask);
901 SW_FLOW_KEY_PUT(match, ip.proto,
902 ipv6_key->ipv6_proto, is_mask);
903 SW_FLOW_KEY_PUT(match, ip.tos,
904 ipv6_key->ipv6_tclass, is_mask);
905 SW_FLOW_KEY_PUT(match, ip.ttl,
906 ipv6_key->ipv6_hlimit, is_mask);
907 SW_FLOW_KEY_PUT(match, ip.frag,
908 ipv6_key->ipv6_frag, is_mask);
909 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src,
910 ipv6_key->ipv6_src,
911 sizeof(match->key->ipv6.addr.src),
912 is_mask);
913 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst,
914 ipv6_key->ipv6_dst,
915 sizeof(match->key->ipv6.addr.dst),
916 is_mask);
917
918 attrs &= ~(1 << OVS_KEY_ATTR_IPV6);
919 }
920
921 if (attrs & (1 << OVS_KEY_ATTR_ARP)) {
922 const struct ovs_key_arp *arp_key;
923
924 arp_key = nla_data(a[OVS_KEY_ATTR_ARP]);
925 if (!is_mask && (arp_key->arp_op & htons(0xff00))) {
05da5898 926 OVS_NLERR(log, "Unknown ARP opcode (opcode=%d).",
e6445719
PS		 927 arp_key->arp_op);
928 return -EINVAL;
929 }
930
931 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
932 arp_key->arp_sip, is_mask);
933 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
934 arp_key->arp_tip, is_mask);
935 SW_FLOW_KEY_PUT(match, ip.proto,
936 ntohs(arp_key->arp_op), is_mask);
937 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha,
938 arp_key->arp_sha, ETH_ALEN, is_mask);
939 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha,
940 arp_key->arp_tha, ETH_ALEN, is_mask);
941
942 attrs &= ~(1 << OVS_KEY_ATTR_ARP);
943 }
944
25cd9ba0
SH		 945 if (attrs & (1 << OVS_KEY_ATTR_MPLS)) {
946 const struct ovs_key_mpls *mpls_key;
947
948 mpls_key = nla_data(a[OVS_KEY_ATTR_MPLS]);
949 SW_FLOW_KEY_PUT(match, mpls.top_lse,
950 mpls_key->mpls_lse, is_mask);
951
952 attrs &= ~(1 << OVS_KEY_ATTR_MPLS);
953 }
954
e6445719
PS		 955 if (attrs & (1 << OVS_KEY_ATTR_TCP)) {
956 const struct ovs_key_tcp *tcp_key;
957
958 tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]);
1139e241
JR		 959 SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask);
960 SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask);
e6445719
PS		 961 attrs &= ~(1 << OVS_KEY_ATTR_TCP);
962 }
963
5eb26b15 964 if (attrs & (1 << OVS_KEY_ATTR_TCP_FLAGS)) {
1b760fb9
JS		 965 SW_FLOW_KEY_PUT(match, tp.flags,
966 nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]),
967 is_mask);
5eb26b15
JR		 968 attrs &= ~(1 << OVS_KEY_ATTR_TCP_FLAGS);
969 }
970
e6445719
PS		 971 if (attrs & (1 << OVS_KEY_ATTR_UDP)) {
972 const struct ovs_key_udp *udp_key;
973
974 udp_key = nla_data(a[OVS_KEY_ATTR_UDP]);
1139e241
JR		 975 SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask);
976 SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask);
e6445719
PS		 977 attrs &= ~(1 << OVS_KEY_ATTR_UDP);
978 }
979
980 if (attrs & (1 << OVS_KEY_ATTR_SCTP)) {
981 const struct ovs_key_sctp *sctp_key;
982
983 sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]);
1139e241
JR		 984 SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask);
985 SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask);
e6445719
PS		 986 attrs &= ~(1 << OVS_KEY_ATTR_SCTP);
987 }
988
989 if (attrs & (1 << OVS_KEY_ATTR_ICMP)) {
990 const struct ovs_key_icmp *icmp_key;
991
992 icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]);
1139e241 993 SW_FLOW_KEY_PUT(match, tp.src,
e6445719 994 htons(icmp_key->icmp_type), is_mask);
1139e241 995 SW_FLOW_KEY_PUT(match, tp.dst,
e6445719
PS		 996 htons(icmp_key->icmp_code), is_mask);
997 attrs &= ~(1 << OVS_KEY_ATTR_ICMP);
998 }
999
1000 if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) {
1001 const struct ovs_key_icmpv6 *icmpv6_key;
1002
1003 icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]);
1139e241 1004 SW_FLOW_KEY_PUT(match, tp.src,
e6445719 1005 htons(icmpv6_key->icmpv6_type), is_mask);
1139e241 1006 SW_FLOW_KEY_PUT(match, tp.dst,
e6445719
PS		 1007 htons(icmpv6_key->icmpv6_code), is_mask);
1008 attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6);
1009 }
1010
1011 if (attrs & (1 << OVS_KEY_ATTR_ND)) {
1012 const struct ovs_key_nd *nd_key;
1013
1014 nd_key = nla_data(a[OVS_KEY_ATTR_ND]);
1015 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target,
1016 nd_key->nd_target,
1017 sizeof(match->key->ipv6.nd.target),
1018 is_mask);
1019 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll,
1020 nd_key->nd_sll, ETH_ALEN, is_mask);
1021 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll,
1022 nd_key->nd_tll, ETH_ALEN, is_mask);
1023 attrs &= ~(1 << OVS_KEY_ATTR_ND);
1024 }
1025
426cda5c 1026 if (attrs != 0) {
05da5898 1027 OVS_NLERR(log, "Unknown key attributes %llx",
426cda5c 1028 (unsigned long long)attrs);
e6445719 1029 return -EINVAL;
426cda5c 1030 }
e6445719
PS		 1031
1032 return 0;
1033}
1034
81bfe3c3
TG		 1035static void nlattr_set(struct nlattr *attr, u8 val,
1036 const struct ovs_len_tbl *tbl)
e6445719 1037{
f47de068
PS		 1038 struct nlattr *nla;
1039 int rem;
e6445719 1040
f47de068
PS		 1041 /* The nlattr stream should already have been validated */
1042 nla_for_each_nested(nla, attr, rem) {
81bfe3c3
TG		 1043 if (tbl && tbl[nla_type(nla)].len == OVS_ATTR_NESTED)
1044 nlattr_set(nla, val, tbl[nla_type(nla)].next);
f47de068
PS		 1045 else
1046 memset(nla_data(nla), val, nla_len(nla));
1047 }
1048}
1049
1050static void mask_set_nlattr(struct nlattr *attr, u8 val)
1051{
81bfe3c3 1052 nlattr_set(attr, val, ovs_key_lens);
e6445719
PS		 1053}
1054
1055/**
1056 * ovs_nla_get_match - parses Netlink attributes into a flow key and
1057 * mask. In case the 'mask' is NULL, the flow is treated as exact match
1058 * flow. Otherwise, it is treated as a wildcarded flow, except the mask
1059 * does not include any don't care bit.
1060 * @match: receives the extracted flow match information.
1061 * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
1062 * sequence. The fields should of the packet that triggered the creation
1063 * of this flow.
1064 * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink
1065 * attribute specifies the mask field of the wildcarded flow.
05da5898
JR		 1066 * @log: Boolean to allow kernel error logging. Normally true, but when
1067 * probing for feature compatibility this should be passed in as false to
1068 * suppress unnecessary error logging.
e6445719
PS		 1069 */
1070int ovs_nla_get_match(struct sw_flow_match *match,
a85311bf 1071 const struct nlattr *nla_key,
05da5898
JR		 1072 const struct nlattr *nla_mask,
1073 bool log)
e6445719
PS		 1074{
1075 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
1076 const struct nlattr *encap;
f47de068 1077 struct nlattr *newmask = NULL;
e6445719
PS		 1078 u64 key_attrs = 0;
1079 u64 mask_attrs = 0;
1080 bool encap_valid = false;
1081 int err;
1082
05da5898 1083 err = parse_flow_nlattrs(nla_key, a, &key_attrs, log);
e6445719
PS		 1084 if (err)
1085 return err;
1086
1087 if ((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) &&
1088 (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) &&
1089 (nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]) == htons(ETH_P_8021Q))) {
1090 __be16 tci;
1091
1092 if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) &&
1093 (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) {
05da5898 1094 OVS_NLERR(log, "Invalid Vlan frame.");
e6445719
PS		 1095 return -EINVAL;
1096 }
1097
1098 key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
1099 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
1100 encap = a[OVS_KEY_ATTR_ENCAP];
1101 key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP);
1102 encap_valid = true;
1103
1104 if (tci & htons(VLAN_TAG_PRESENT)) {
05da5898 1105 err = parse_flow_nlattrs(encap, a, &key_attrs, log);
e6445719
PS		 1106 if (err)
1107 return err;
1108 } else if (!tci) {
1109 /* Corner case for truncated 802.1Q header. */
1110 if (nla_len(encap)) {
05da5898 1111 OVS_NLERR(log, "Truncated 802.1Q header has non-zero encap attribute.");
e6445719
PS		 1112 return -EINVAL;
1113 }
1114 } else {
05da5898 1115 OVS_NLERR(log, "Encap attr is set for non-VLAN frame");
e6445719
PS		 1116 return -EINVAL;
1117 }
1118 }
1119
05da5898 1120 err = ovs_key_from_nlattrs(match, key_attrs, a, false, log);
e6445719
PS		 1121 if (err)
1122 return err;
1123
a85311bf
PS		 1124 if (match->mask) {
1125 if (!nla_mask) {
1126 /* Create an exact match mask. We need to set to 0xff
1127 * all the 'match->mask' fields that have been touched
1128 * in 'match->key'. We cannot simply memset
1129 * 'match->mask', because padding bytes and fields not
1130 * specified in 'match->key' should be left to 0.
1131 * Instead, we use a stream of netlink attributes,
1132 * copied from 'key' and set to 0xff.
1133 * ovs_key_from_nlattrs() will take care of filling
1134 * 'match->mask' appropriately.
1135 */
1136 newmask = kmemdup(nla_key,
1137 nla_total_size(nla_len(nla_key)),
1138 GFP_KERNEL);
1139 if (!newmask)
1140 return -ENOMEM;
f47de068 1141
a85311bf 1142 mask_set_nlattr(newmask, 0xff);
f47de068 1143
a85311bf
PS		 1144 /* The userspace does not send tunnel attributes that
1145 * are 0, but we should not wildcard them nonetheless.
1146 */
c1ea5d67 1147 if (match->key->tun_key.u.ipv4.dst)
a85311bf
PS		 1148 SW_FLOW_KEY_MEMSET_FIELD(match, tun_key,
1149 0xff, true);
f47de068 1150
a85311bf
PS		 1151 nla_mask = newmask;
1152 }
f47de068 1153
05da5898 1154 err = parse_flow_mask_nlattrs(nla_mask, a, &mask_attrs, log);
e6445719 1155 if (err)
f47de068 1156 goto free_newmask;
e6445719 1157
a85311bf
PS		 1158 /* Always match on tci. */
1159 SW_FLOW_KEY_PUT(match, eth.tci, htons(0xffff), true);
1160
f47de068 1161 if (mask_attrs & 1 << OVS_KEY_ATTR_ENCAP) {
e6445719
PS		 1162 __be16 eth_type = 0;
1163 __be16 tci = 0;
1164
1165 if (!encap_valid) {
05da5898 1166 OVS_NLERR(log, "Encap mask attribute is set for non-VLAN frame.");
f47de068
PS		 1167 err = -EINVAL;
1168 goto free_newmask;
e6445719
PS		 1169 }
1170
1171 mask_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP);
1172 if (a[OVS_KEY_ATTR_ETHERTYPE])
1173 eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
1174
1175 if (eth_type == htons(0xffff)) {
1176 mask_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
1177 encap = a[OVS_KEY_ATTR_ENCAP];
05da5898
JR		 1178 err = parse_flow_mask_nlattrs(encap, a,
1179 &mask_attrs, log);
f47de068
PS		 1180 if (err)
1181 goto free_newmask;
e6445719 1182 } else {
05da5898
JR		 1183 OVS_NLERR(log, "VLAN frames must have an exact match on the TPID (mask=%x).",
1184 ntohs(eth_type));
f47de068
PS		 1185 err = -EINVAL;
1186 goto free_newmask;
e6445719
PS		 1187 }
1188
1189 if (a[OVS_KEY_ATTR_VLAN])
1190 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
1191
1192 if (!(tci & htons(VLAN_TAG_PRESENT))) {
05da5898
JR		 1193 OVS_NLERR(log, "VLAN tag present bit must have an exact match (tci_mask=%x).",
1194 ntohs(tci));
f47de068
PS		 1195 err = -EINVAL;
1196 goto free_newmask;
e6445719
PS		 1197 }
1198 }
1199
05da5898 1200 err = ovs_key_from_nlattrs(match, mask_attrs, a, true, log);
e6445719 1201 if (err)
f47de068 1202 goto free_newmask;
e6445719
PS		 1203 }
1204
05da5898 1205 if (!match_validate(match, key_attrs, mask_attrs, log))
f47de068 1206 err = -EINVAL;
e6445719 1207
f47de068
PS		 1208free_newmask:
1209 kfree(newmask);
1210 return err;
e6445719
PS		 1211}
1212
74ed7ab9
JS		 1213static size_t get_ufid_len(const struct nlattr *attr, bool log)
1214{
1215 size_t len;
1216
1217 if (!attr)
1218 return 0;
1219
1220 len = nla_len(attr);
1221 if (len < 1 || len > MAX_UFID_LENGTH) {
1222 OVS_NLERR(log, "ufid size %u bytes exceeds the range (1, %d)",
1223 nla_len(attr), MAX_UFID_LENGTH);
1224 return 0;
1225 }
1226
1227 return len;
1228}
1229
1230/* Initializes 'flow->ufid', returning true if 'attr' contains a valid UFID,
1231 * or false otherwise.
1232 */
1233bool ovs_nla_get_ufid(struct sw_flow_id *sfid, const struct nlattr *attr,
1234 bool log)
1235{
1236 sfid->ufid_len = get_ufid_len(attr, log);
1237 if (sfid->ufid_len)
1238 memcpy(sfid->ufid, nla_data(attr), sfid->ufid_len);
1239
1240 return sfid->ufid_len;
1241}
1242
1243int ovs_nla_get_identifier(struct sw_flow_id *sfid, const struct nlattr *ufid,
1244 const struct sw_flow_key *key, bool log)
1245{
1246 struct sw_flow_key *new_key;
1247
1248 if (ovs_nla_get_ufid(sfid, ufid, log))
1249 return 0;
1250
1251 /* If UFID was not provided, use unmasked key. */
1252 new_key = kmalloc(sizeof(*new_key), GFP_KERNEL);
1253 if (!new_key)
1254 return -ENOMEM;
1255 memcpy(new_key, key, sizeof(*key));
1256 sfid->unmasked_key = new_key;
1257
1258 return 0;
1259}
1260
1261u32 ovs_nla_get_ufid_flags(const struct nlattr *attr)
1262{
1263 return attr ? nla_get_u32(attr) : 0;
1264}
1265
e6445719
PS		 1266/**
1267 * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key.
83c8df26 1268 * @key: Receives extracted in_port, priority, tun_key and skb_mark.
e6445719
PS		 1269 * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
1270 * sequence.
05da5898
JR		 1271 * @log: Boolean to allow kernel error logging. Normally true, but when
1272 * probing for feature compatibility this should be passed in as false to
1273 * suppress unnecessary error logging.
e6445719
PS		 1274 *
1275 * This parses a series of Netlink attributes that form a flow key, which must
1276 * take the same form accepted by flow_from_nlattrs(), but only enough of it to
1277 * get the metadata, that is, the parts of the flow key that cannot be
1278 * extracted from the packet itself.
1279 */
1280
83c8df26 1281int ovs_nla_get_flow_metadata(const struct nlattr *attr,
05da5898
JR		 1282 struct sw_flow_key *key,
1283 bool log)
e6445719 1284{
e6445719 1285 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
83c8df26 1286 struct sw_flow_match match;
e6445719
PS		 1287 u64 attrs = 0;
1288 int err;
e6445719 1289
05da5898 1290 err = parse_flow_nlattrs(attr, a, &attrs, log);
e6445719
PS		 1291 if (err)
1292 return -EINVAL;
1293
1294 memset(&match, 0, sizeof(match));
83c8df26 1295 match.key = key;
e6445719 1296
7f8a436e 1297 memset(&key->ct, 0, sizeof(key->ct));
83c8df26 1298 key->phy.in_port = DP_MAX_PORTS;
e6445719 1299
05da5898 1300 return metadata_from_nlattrs(&match, &attrs, a, false, log);
e6445719
PS		 1301}
1302
5b4237bb
JS		 1303static int __ovs_nla_put_key(const struct sw_flow_key *swkey,
1304 const struct sw_flow_key *output, bool is_mask,
1305 struct sk_buff *skb)
e6445719
PS		 1306{
1307 struct ovs_key_ethernet *eth_key;
1308 struct nlattr *nla, *encap;
e6445719 1309
971427f3
AZ		 1310 if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id))
1311 goto nla_put_failure;
1312
1313 if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash))
1314 goto nla_put_failure;
1315
e6445719
PS		 1316 if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority))
1317 goto nla_put_failure;
1318
c1ea5d67 1319 if ((swkey->tun_key.u.ipv4.dst || is_mask)) {
d91641d9 1320 const void *opts = NULL;
f5796684
JG		 1321
1322 if (output->tun_key.tun_flags & TUNNEL_OPTIONS_PRESENT)
d91641d9 1323 opts = TUN_METADATA_OPTS(output, swkey->tun_opts_len);
f5796684
JG		 1324
1325 if (ipv4_tun_to_nlattr(skb, &output->tun_key, opts,
1326 swkey->tun_opts_len))
1327 goto nla_put_failure;
1328 }
e6445719
PS		 1329
1330 if (swkey->phy.in_port == DP_MAX_PORTS) {
1331 if (is_mask && (output->phy.in_port == 0xffff))
1332 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff))
1333 goto nla_put_failure;
1334 } else {
1335 u16 upper_u16;
1336 upper_u16 = !is_mask ? 0 : 0xffff;
1337
1338 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT,
1339 (upper_u16 << 16) | output->phy.in_port))
1340 goto nla_put_failure;
1341 }
1342
1343 if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark))
1344 goto nla_put_failure;
1345
7f8a436e
JS		 1346 if (ovs_ct_put_key(output, skb))
1347 goto nla_put_failure;
1348
e6445719
PS		 1349 nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key));
1350 if (!nla)
1351 goto nla_put_failure;
1352
1353 eth_key = nla_data(nla);
8c63ff09
JP		 1354 ether_addr_copy(eth_key->eth_src, output->eth.src);
1355 ether_addr_copy(eth_key->eth_dst, output->eth.dst);
e6445719
PS		 1356
1357 if (swkey->eth.tci || swkey->eth.type == htons(ETH_P_8021Q)) {
1358 __be16 eth_type;
1359 eth_type = !is_mask ? htons(ETH_P_8021Q) : htons(0xffff);
1360 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) ||
1361 nla_put_be16(skb, OVS_KEY_ATTR_VLAN, output->eth.tci))
1362 goto nla_put_failure;
1363 encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
1364 if (!swkey->eth.tci)
1365 goto unencap;
1366 } else
1367 encap = NULL;
1368
1369 if (swkey->eth.type == htons(ETH_P_802_2)) {
1370 /*
1371 * Ethertype 802.2 is represented in the netlink with omitted
1372 * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and
1373 * 0xffff in the mask attribute. Ethertype can also
1374 * be wildcarded.
1375 */
1376 if (is_mask && output->eth.type)
1377 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE,
1378 output->eth.type))
1379 goto nla_put_failure;
1380 goto unencap;
1381 }
1382
1383 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type))
1384 goto nla_put_failure;
1385
1386 if (swkey->eth.type == htons(ETH_P_IP)) {
1387 struct ovs_key_ipv4 *ipv4_key;
1388
1389 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key));
1390 if (!nla)
1391 goto nla_put_failure;
1392 ipv4_key = nla_data(nla);
1393 ipv4_key->ipv4_src = output->ipv4.addr.src;
1394 ipv4_key->ipv4_dst = output->ipv4.addr.dst;
1395 ipv4_key->ipv4_proto = output->ip.proto;
1396 ipv4_key->ipv4_tos = output->ip.tos;
1397 ipv4_key->ipv4_ttl = output->ip.ttl;
1398 ipv4_key->ipv4_frag = output->ip.frag;
1399 } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
1400 struct ovs_key_ipv6 *ipv6_key;
1401
1402 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key));
1403 if (!nla)
1404 goto nla_put_failure;
1405 ipv6_key = nla_data(nla);
1406 memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src,
1407 sizeof(ipv6_key->ipv6_src));
1408 memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst,
1409 sizeof(ipv6_key->ipv6_dst));
1410 ipv6_key->ipv6_label = output->ipv6.label;
1411 ipv6_key->ipv6_proto = output->ip.proto;
1412 ipv6_key->ipv6_tclass = output->ip.tos;
1413 ipv6_key->ipv6_hlimit = output->ip.ttl;
1414 ipv6_key->ipv6_frag = output->ip.frag;
1415 } else if (swkey->eth.type == htons(ETH_P_ARP) ||
1416 swkey->eth.type == htons(ETH_P_RARP)) {
1417 struct ovs_key_arp *arp_key;
1418
1419 nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key));
1420 if (!nla)
1421 goto nla_put_failure;
1422 arp_key = nla_data(nla);
1423 memset(arp_key, 0, sizeof(struct ovs_key_arp));
1424 arp_key->arp_sip = output->ipv4.addr.src;
1425 arp_key->arp_tip = output->ipv4.addr.dst;
1426 arp_key->arp_op = htons(output->ip.proto);
8c63ff09
JP		 1427 ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha);
1428 ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha);
25cd9ba0
SH		 1429 } else if (eth_p_mpls(swkey->eth.type)) {
1430 struct ovs_key_mpls *mpls_key;
1431
1432 nla = nla_reserve(skb, OVS_KEY_ATTR_MPLS, sizeof(*mpls_key));
1433 if (!nla)
1434 goto nla_put_failure;
1435 mpls_key = nla_data(nla);
1436 mpls_key->mpls_lse = output->mpls.top_lse;
e6445719
PS		 1437 }
1438
1439 if ((swkey->eth.type == htons(ETH_P_IP) ||
1440 swkey->eth.type == htons(ETH_P_IPV6)) &&
1441 swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
1442
1443 if (swkey->ip.proto == IPPROTO_TCP) {
1444 struct ovs_key_tcp *tcp_key;
1445
1446 nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key));
1447 if (!nla)
1448 goto nla_put_failure;
1449 tcp_key = nla_data(nla);
1139e241
JR		 1450 tcp_key->tcp_src = output->tp.src;
1451 tcp_key->tcp_dst = output->tp.dst;
1452 if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS,
1453 output->tp.flags))
1454 goto nla_put_failure;
e6445719
PS		 1455 } else if (swkey->ip.proto == IPPROTO_UDP) {
1456 struct ovs_key_udp *udp_key;
1457
1458 nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key));
1459 if (!nla)
1460 goto nla_put_failure;
1461 udp_key = nla_data(nla);
1139e241
JR		 1462 udp_key->udp_src = output->tp.src;
1463 udp_key->udp_dst = output->tp.dst;
e6445719
PS		 1464 } else if (swkey->ip.proto == IPPROTO_SCTP) {
1465 struct ovs_key_sctp *sctp_key;
1466
1467 nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key));
1468 if (!nla)
1469 goto nla_put_failure;
1470 sctp_key = nla_data(nla);
1139e241
JR		 1471 sctp_key->sctp_src = output->tp.src;
1472 sctp_key->sctp_dst = output->tp.dst;
e6445719
PS		 1473 } else if (swkey->eth.type == htons(ETH_P_IP) &&
1474 swkey->ip.proto == IPPROTO_ICMP) {
1475 struct ovs_key_icmp *icmp_key;
1476
1477 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key));
1478 if (!nla)
1479 goto nla_put_failure;
1480 icmp_key = nla_data(nla);
1139e241
JR		 1481 icmp_key->icmp_type = ntohs(output->tp.src);
1482 icmp_key->icmp_code = ntohs(output->tp.dst);
e6445719
PS		 1483 } else if (swkey->eth.type == htons(ETH_P_IPV6) &&
1484 swkey->ip.proto == IPPROTO_ICMPV6) {
1485 struct ovs_key_icmpv6 *icmpv6_key;
1486
1487 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6,
1488 sizeof(*icmpv6_key));
1489 if (!nla)
1490 goto nla_put_failure;
1491 icmpv6_key = nla_data(nla);
1139e241
JR		 1492 icmpv6_key->icmpv6_type = ntohs(output->tp.src);
1493 icmpv6_key->icmpv6_code = ntohs(output->tp.dst);
e6445719
PS		 1494
1495 if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION ||
1496 icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) {
1497 struct ovs_key_nd *nd_key;
1498
1499 nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key));
1500 if (!nla)
1501 goto nla_put_failure;
1502 nd_key = nla_data(nla);
1503 memcpy(nd_key->nd_target, &output->ipv6.nd.target,
1504 sizeof(nd_key->nd_target));
8c63ff09
JP		 1505 ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll);
1506 ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll);
e6445719
PS		 1507 }
1508 }
1509 }
1510
1511unencap:
1512 if (encap)
1513 nla_nest_end(skb, encap);
1514
1515 return 0;
1516
1517nla_put_failure:
1518 return -EMSGSIZE;
1519}
1520
5b4237bb
JS		 1521int ovs_nla_put_key(const struct sw_flow_key *swkey,
1522 const struct sw_flow_key *output, int attr, bool is_mask,
1523 struct sk_buff *skb)
1524{
1525 int err;
1526 struct nlattr *nla;
1527
1528 nla = nla_nest_start(skb, attr);
1529 if (!nla)
1530 return -EMSGSIZE;
1531 err = __ovs_nla_put_key(swkey, output, is_mask, skb);
1532 if (err)
1533 return err;
1534 nla_nest_end(skb, nla);
1535
1536 return 0;
1537}
1538
1539/* Called with ovs_mutex or RCU read lock. */
74ed7ab9
JS		 1540int ovs_nla_put_identifier(const struct sw_flow *flow, struct sk_buff *skb)
1541{
1542 if (ovs_identifier_is_ufid(&flow->id))
1543 return nla_put(skb, OVS_FLOW_ATTR_UFID, flow->id.ufid_len,
1544 flow->id.ufid);
1545
1546 return ovs_nla_put_key(flow->id.unmasked_key, flow->id.unmasked_key,
1547 OVS_FLOW_ATTR_KEY, false, skb);
1548}
1549
1550/* Called with ovs_mutex or RCU read lock. */
1551int ovs_nla_put_masked_key(const struct sw_flow *flow, struct sk_buff *skb)
5b4237bb 1552{
26ad0b83 1553 return ovs_nla_put_key(&flow->key, &flow->key,
5b4237bb
JS		 1554 OVS_FLOW_ATTR_KEY, false, skb);
1555}
1556
1557/* Called with ovs_mutex or RCU read lock. */
1558int ovs_nla_put_mask(const struct sw_flow *flow, struct sk_buff *skb)
1559{
1560 return ovs_nla_put_key(&flow->key, &flow->mask->key,
1561 OVS_FLOW_ATTR_MASK, true, skb);
1562}
1563
e6445719
PS		 1564#define MAX_ACTIONS_BUFSIZE (32 * 1024)
1565
05da5898 1566static struct sw_flow_actions *nla_alloc_flow_actions(int size, bool log)
e6445719
PS		 1567{
1568 struct sw_flow_actions *sfa;
1569
426cda5c 1570 if (size > MAX_ACTIONS_BUFSIZE) {
05da5898 1571 OVS_NLERR(log, "Flow action size %u bytes exceeds max", size);
e6445719 1572 return ERR_PTR(-EINVAL);
426cda5c 1573 }
e6445719
PS		 1574
1575 sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL);
1576 if (!sfa)
1577 return ERR_PTR(-ENOMEM);
1578
1579 sfa->actions_len = 0;
1580 return sfa;
1581}
1582
34ae932a
TG		 1583static void ovs_nla_free_set_action(const struct nlattr *a)
1584{
1585 const struct nlattr *ovs_key = nla_data(a);
1586 struct ovs_tunnel_info *ovs_tun;
1587
1588 switch (nla_type(ovs_key)) {
1589 case OVS_KEY_ATTR_TUNNEL_INFO:
1590 ovs_tun = nla_data(ovs_key);
1591 dst_release((struct dst_entry *)ovs_tun->tun_dst);
1592 break;
1593 }
1594}
1595
1596void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts)
1597{
1598 const struct nlattr *a;
1599 int rem;
1600
1601 if (!sf_acts)
1602 return;
1603
1604 nla_for_each_attr(a, sf_acts->actions, sf_acts->actions_len, rem) {
1605 switch (nla_type(a)) {
1606 case OVS_ACTION_ATTR_SET:
1607 ovs_nla_free_set_action(a);
1608 break;
7f8a436e
JS		 1609 case OVS_ACTION_ATTR_CT:
1610 ovs_ct_free_action(a);
1611 break;
34ae932a
TG		 1612 }
1613 }
1614
1615 kfree(sf_acts);
1616}
1617
1618static void __ovs_nla_free_flow_actions(struct rcu_head *head)
1619{
1620 ovs_nla_free_flow_actions(container_of(head, struct sw_flow_actions, rcu));
1621}
1622
e6445719
PS		 1623/* Schedules 'sf_acts' to be freed after the next RCU grace period.
1624 * The caller must hold rcu_read_lock for this to be sensible. */
34ae932a 1625void ovs_nla_free_flow_actions_rcu(struct sw_flow_actions *sf_acts)
e6445719 1626{
34ae932a 1627 call_rcu(&sf_acts->rcu, __ovs_nla_free_flow_actions);
e6445719
PS		 1628}
1629
1630static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa,
05da5898 1631 int attr_len, bool log)
e6445719
PS		 1632{
1633
1634 struct sw_flow_actions *acts;
1635 int new_acts_size;
1636 int req_size = NLA_ALIGN(attr_len);
1637 int next_offset = offsetof(struct sw_flow_actions, actions) +
1638 (*sfa)->actions_len;
1639
1640 if (req_size <= (ksize(*sfa) - next_offset))
1641 goto out;
1642
1643 new_acts_size = ksize(*sfa) * 2;
1644
1645 if (new_acts_size > MAX_ACTIONS_BUFSIZE) {
1646 if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size)
1647 return ERR_PTR(-EMSGSIZE);
1648 new_acts_size = MAX_ACTIONS_BUFSIZE;
1649 }
1650
05da5898 1651 acts = nla_alloc_flow_actions(new_acts_size, log);
e6445719
PS		 1652 if (IS_ERR(acts))
1653 return (void *)acts;
1654
1655 memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len);
1656 acts->actions_len = (*sfa)->actions_len;
8e2fed1c 1657 acts->orig_len = (*sfa)->orig_len;
e6445719
PS		 1658 kfree(*sfa);
1659 *sfa = acts;
1660
1661out:
1662 (*sfa)->actions_len += req_size;
1663 return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset);
1664}
1665
f0b128c1 1666static struct nlattr *__add_action(struct sw_flow_actions **sfa,
05da5898 1667 int attrtype, void *data, int len, bool log)
e6445719
PS		 1668{
1669 struct nlattr *a;
1670
05da5898 1671 a = reserve_sfa_size(sfa, nla_attr_size(len), log);
e6445719 1672 if (IS_ERR(a))
f0b128c1 1673 return a;
e6445719
PS		 1674
1675 a->nla_type = attrtype;
1676 a->nla_len = nla_attr_size(len);
1677
1678 if (data)
1679 memcpy(nla_data(a), data, len);
1680 memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len));
1681
f0b128c1
JG		 1682 return a;
1683}
1684
7f8a436e
JS		 1685int ovs_nla_add_action(struct sw_flow_actions **sfa, int attrtype, void *data,
1686 int len, bool log)
f0b128c1
JG		 1687{
1688 struct nlattr *a;
1689
05da5898 1690 a = __add_action(sfa, attrtype, data, len, log);
f0b128c1 1691
f35423c1 1692 return PTR_ERR_OR_ZERO(a);
e6445719
PS		 1693}
1694
1695static inline int add_nested_action_start(struct sw_flow_actions **sfa,
05da5898 1696 int attrtype, bool log)
e6445719
PS		 1697{
1698 int used = (*sfa)->actions_len;
1699 int err;
1700
7f8a436e 1701 err = ovs_nla_add_action(sfa, attrtype, NULL, 0, log);
e6445719
PS		 1702 if (err)
1703 return err;
1704
1705 return used;
1706}
1707
1708static inline void add_nested_action_end(struct sw_flow_actions *sfa,
1709 int st_offset)
1710{
1711 struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions +
1712 st_offset);
1713
1714 a->nla_len = sfa->actions_len - st_offset;
1715}
1716
7f8a436e 1717static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
25cd9ba0
SH		 1718 const struct sw_flow_key *key,
1719 int depth, struct sw_flow_actions **sfa,
05da5898 1720 __be16 eth_type, __be16 vlan_tci, bool log);
25cd9ba0 1721
7f8a436e 1722static int validate_and_copy_sample(struct net *net, const struct nlattr *attr,
e6445719 1723 const struct sw_flow_key *key, int depth,
25cd9ba0 1724 struct sw_flow_actions **sfa,
05da5898 1725 __be16 eth_type, __be16 vlan_tci, bool log)
e6445719
PS		 1726{
1727 const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];
1728 const struct nlattr *probability, *actions;
1729 const struct nlattr *a;
1730 int rem, start, err, st_acts;
1731
1732 memset(attrs, 0, sizeof(attrs));
1733 nla_for_each_nested(a, attr, rem) {
1734 int type = nla_type(a);
1735 if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type])
1736 return -EINVAL;
1737 attrs[type] = a;
1738 }
1739 if (rem)
1740 return -EINVAL;
1741
1742 probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY];
1743 if (!probability || nla_len(probability) != sizeof(u32))
1744 return -EINVAL;
1745
1746 actions = attrs[OVS_SAMPLE_ATTR_ACTIONS];
1747 if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN))
1748 return -EINVAL;
1749
1750 /* validation done, copy sample action. */
05da5898 1751 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE, log);
e6445719
PS		 1752 if (start < 0)
1753 return start;
7f8a436e
JS		 1754 err = ovs_nla_add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY,
1755 nla_data(probability), sizeof(u32), log);
e6445719
PS		 1756 if (err)
1757 return err;
05da5898 1758 st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS, log);
e6445719
PS		 1759 if (st_acts < 0)
1760 return st_acts;
1761
7f8a436e 1762 err = __ovs_nla_copy_actions(net, actions, key, depth + 1, sfa,
05da5898 1763 eth_type, vlan_tci, log);
e6445719
PS		 1764 if (err)
1765 return err;
1766
1767 add_nested_action_end(*sfa, st_acts);
1768 add_nested_action_end(*sfa, start);
1769
1770 return 0;
1771}
1772
e6445719
PS		 1773void ovs_match_init(struct sw_flow_match *match,
1774 struct sw_flow_key *key,
1775 struct sw_flow_mask *mask)
1776{
1777 memset(match, 0, sizeof(*match));
1778 match->key = key;
1779 match->mask = mask;
1780
1781 memset(key, 0, sizeof(*key));
1782
1783 if (mask) {
1784 memset(&mask->key, 0, sizeof(mask->key));
1785 mask->range.start = mask->range.end = 0;
1786 }
1787}
1788
d91641d9
TG		 1789static int validate_geneve_opts(struct sw_flow_key *key)
1790{
1791 struct geneve_opt *option;
1792 int opts_len = key->tun_opts_len;
1793 bool crit_opt = false;
1794
1795 option = (struct geneve_opt *)TUN_METADATA_OPTS(key, key->tun_opts_len);
1796 while (opts_len > 0) {
1797 int len;
1798
1799 if (opts_len < sizeof(*option))
1800 return -EINVAL;
1801
1802 len = sizeof(*option) + option->length * 4;
1803 if (len > opts_len)
1804 return -EINVAL;
1805
1806 crit_opt |= !!(option->type & GENEVE_CRIT_OPT_TYPE);
1807
1808 option = (struct geneve_opt *)((u8 *)option + len);
1809 opts_len -= len;
1810 };
1811
1812 key->tun_key.tun_flags |= crit_opt ? TUNNEL_CRIT_OPT : 0;
1813
1814 return 0;
1815}
1816
e6445719 1817static int validate_and_copy_set_tun(const struct nlattr *attr,
05da5898 1818 struct sw_flow_actions **sfa, bool log)
e6445719
PS		 1819{
1820 struct sw_flow_match match;
1821 struct sw_flow_key key;
34ae932a 1822 struct metadata_dst *tun_dst;
1d8fff90 1823 struct ip_tunnel_info *tun_info;
34ae932a 1824 struct ovs_tunnel_info *ovs_tun;
f0b128c1 1825 struct nlattr *a;
13101602 1826 int err = 0, start, opts_type;
e6445719
PS		 1827
1828 ovs_match_init(&match, &key, NULL);
1dd144cf
TG		 1829 opts_type = ipv4_tun_from_nlattr(nla_data(attr), &match, false, log);
1830 if (opts_type < 0)
1831 return opts_type;
e6445719 1832
f5796684 1833 if (key.tun_opts_len) {
1dd144cf
TG		 1834 switch (opts_type) {
1835 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
1836 err = validate_geneve_opts(&key);
1837 if (err < 0)
1838 return err;
1839 break;
1840 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
1841 break;
1842 }
f5796684
JG		 1843 };
1844
05da5898 1845 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET, log);
e6445719
PS		 1846 if (start < 0)
1847 return start;
1848
34ae932a
TG		 1849 tun_dst = metadata_dst_alloc(key.tun_opts_len, GFP_KERNEL);
1850 if (!tun_dst)
1851 return -ENOMEM;
1852
f0b128c1 1853 a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL,
34ae932a
TG		 1854 sizeof(*ovs_tun), log);
1855 if (IS_ERR(a)) {
1856 dst_release((struct dst_entry *)tun_dst);
f0b128c1 1857 return PTR_ERR(a);
34ae932a
TG		 1858 }
1859
1860 ovs_tun = nla_data(a);
1861 ovs_tun->tun_dst = tun_dst;
f0b128c1 1862
34ae932a
TG		 1863 tun_info = &tun_dst->u.tun_info;
1864 tun_info->mode = IP_TUNNEL_INFO_TX;
1d8fff90 1865 tun_info->key = key.tun_key;
f5796684
JG		 1866 tun_info->options_len = key.tun_opts_len;
1867
1868 if (tun_info->options_len) {
1869 /* We need to store the options in the action itself since
1870 * everything else will go away after flow setup. We can append
1871 * it to tun_info and then point there.
1872 */
d91641d9
TG		 1873 memcpy((tun_info + 1),
1874 TUN_METADATA_OPTS(&key, key.tun_opts_len), key.tun_opts_len);
1875 tun_info->options = (tun_info + 1);
f5796684
JG		 1876 } else {
1877 tun_info->options = NULL;
1878 }
f0b128c1 1879
e6445719
PS		 1880 add_nested_action_end(*sfa, start);
1881
1882 return err;
1883}
1884
83d2b9ba
JR		 1885/* Return false if there are any non-masked bits set.
1886 * Mask follows data immediately, before any netlink padding.
1887 */
1888static bool validate_masked(u8 *data, int len)
1889{
1890 u8 *mask = data + len;
1891
1892 while (len--)
1893 if (*data++ & ~*mask++)
1894 return false;
1895
1896 return true;
1897}
1898
e6445719
PS		 1899static int validate_set(const struct nlattr *a,
1900 const struct sw_flow_key *flow_key,
1901 struct sw_flow_actions **sfa,
83d2b9ba 1902 bool *skip_copy, __be16 eth_type, bool masked, bool log)
e6445719
PS		 1903{
1904 const struct nlattr *ovs_key = nla_data(a);
1905 int key_type = nla_type(ovs_key);
83d2b9ba 1906 size_t key_len;
e6445719
PS		 1907
1908 /* There can be only one key in a action */
1909 if (nla_total_size(nla_len(ovs_key)) != nla_len(a))
1910 return -EINVAL;
1911
83d2b9ba
JR		 1912 key_len = nla_len(ovs_key);
1913 if (masked)
1914 key_len /= 2;
1915
e6445719 1916 if (key_type > OVS_KEY_ATTR_MAX ||
83d2b9ba 1917 (ovs_key_lens[key_type].len != key_len &&
81bfe3c3 1918 ovs_key_lens[key_type].len != OVS_ATTR_NESTED))
e6445719
PS		 1919 return -EINVAL;
1920
83d2b9ba
JR		 1921 if (masked && !validate_masked(nla_data(ovs_key), key_len))
1922 return -EINVAL;
1923
e6445719
PS		 1924 switch (key_type) {
1925 const struct ovs_key_ipv4 *ipv4_key;
1926 const struct ovs_key_ipv6 *ipv6_key;
1927 int err;
1928
1929 case OVS_KEY_ATTR_PRIORITY:
1930 case OVS_KEY_ATTR_SKB_MARK:
182e3042 1931 case OVS_KEY_ATTR_CT_MARK:
e6445719
PS		 1932 case OVS_KEY_ATTR_ETHERNET:
1933 break;
1934
1935 case OVS_KEY_ATTR_TUNNEL:
25cd9ba0
SH		 1936 if (eth_p_mpls(eth_type))
1937 return -EINVAL;
1938
83d2b9ba
JR		 1939 if (masked)
1940 return -EINVAL; /* Masked tunnel set not supported. */
1941
1942 *skip_copy = true;
05da5898 1943 err = validate_and_copy_set_tun(a, sfa, log);
e6445719
PS		 1944 if (err)
1945 return err;
1946 break;
1947
1948 case OVS_KEY_ATTR_IPV4:
25cd9ba0 1949 if (eth_type != htons(ETH_P_IP))
e6445719
PS		 1950 return -EINVAL;
1951
e6445719 1952 ipv4_key = nla_data(ovs_key);
e6445719 1953
83d2b9ba
JR		 1954 if (masked) {
1955 const struct ovs_key_ipv4 *mask = ipv4_key + 1;
e6445719 1956
83d2b9ba
JR		 1957 /* Non-writeable fields. */
1958 if (mask->ipv4_proto || mask->ipv4_frag)
1959 return -EINVAL;
1960 } else {
1961 if (ipv4_key->ipv4_proto != flow_key->ip.proto)
1962 return -EINVAL;
1963
1964 if (ipv4_key->ipv4_frag != flow_key->ip.frag)
1965 return -EINVAL;
1966 }
e6445719
PS		 1967 break;
1968
1969 case OVS_KEY_ATTR_IPV6:
25cd9ba0 1970 if (eth_type != htons(ETH_P_IPV6))
e6445719
PS		 1971 return -EINVAL;
1972
e6445719 1973 ipv6_key = nla_data(ovs_key);
e6445719 1974
83d2b9ba
JR		 1975 if (masked) {
1976 const struct ovs_key_ipv6 *mask = ipv6_key + 1;
1977
1978 /* Non-writeable fields. */
1979 if (mask->ipv6_proto || mask->ipv6_frag)
1980 return -EINVAL;
1981
1982 /* Invalid bits in the flow label mask? */
1983 if (ntohl(mask->ipv6_label) & 0xFFF00000)
1984 return -EINVAL;
1985 } else {
1986 if (ipv6_key->ipv6_proto != flow_key->ip.proto)
1987 return -EINVAL;
e6445719 1988
83d2b9ba
JR		 1989 if (ipv6_key->ipv6_frag != flow_key->ip.frag)
1990 return -EINVAL;
1991 }
e6445719
PS		 1992 if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000)
1993 return -EINVAL;
1994
1995 break;
1996
1997 case OVS_KEY_ATTR_TCP:
83d2b9ba
JR		 1998 if ((eth_type != htons(ETH_P_IP) &&
1999 eth_type != htons(ETH_P_IPV6)) ||
2000 flow_key->ip.proto != IPPROTO_TCP)
e6445719
PS		 2001 return -EINVAL;
2002
83d2b9ba 2003 break;
e6445719
PS		 2004
2005 case OVS_KEY_ATTR_UDP:
83d2b9ba
JR		 2006 if ((eth_type != htons(ETH_P_IP) &&
2007 eth_type != htons(ETH_P_IPV6)) ||
2008 flow_key->ip.proto != IPPROTO_UDP)
e6445719
PS		 2009 return -EINVAL;
2010
83d2b9ba 2011 break;
25cd9ba0
SH		 2012
2013 case OVS_KEY_ATTR_MPLS:
2014 if (!eth_p_mpls(eth_type))
2015 return -EINVAL;
2016 break;
e6445719
PS		 2017
2018 case OVS_KEY_ATTR_SCTP:
83d2b9ba
JR		 2019 if ((eth_type != htons(ETH_P_IP) &&
2020 eth_type != htons(ETH_P_IPV6)) ||
2021 flow_key->ip.proto != IPPROTO_SCTP)
e6445719
PS		 2022 return -EINVAL;
2023
83d2b9ba 2024 break;
e6445719
PS		 2025
2026 default:
2027 return -EINVAL;
2028 }
2029
83d2b9ba
JR		 2030 /* Convert non-masked non-tunnel set actions to masked set actions. */
2031 if (!masked && key_type != OVS_KEY_ATTR_TUNNEL) {
2032 int start, len = key_len * 2;
2033 struct nlattr *at;
2034
2035 *skip_copy = true;
2036
2037 start = add_nested_action_start(sfa,
2038 OVS_ACTION_ATTR_SET_TO_MASKED,
2039 log);
2040 if (start < 0)
2041 return start;
2042
2043 at = __add_action(sfa, key_type, NULL, len, log);
2044 if (IS_ERR(at))
2045 return PTR_ERR(at);
2046
2047 memcpy(nla_data(at), nla_data(ovs_key), key_len); /* Key. */
2048 memset(nla_data(at) + key_len, 0xff, key_len); /* Mask. */
2049 /* Clear non-writeable bits from otherwise writeable fields. */
2050 if (key_type == OVS_KEY_ATTR_IPV6) {
2051 struct ovs_key_ipv6 *mask = nla_data(at) + key_len;
2052
2053 mask->ipv6_label &= htonl(0x000FFFFF);
2054 }
2055 add_nested_action_end(*sfa, start);
2056 }
2057
e6445719
PS		 2058 return 0;
2059}
2060
2061static int validate_userspace(const struct nlattr *attr)
2062{
2063 static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = {
2064 [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 },
2065 [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC },
8f0aad6f 2066 [OVS_USERSPACE_ATTR_EGRESS_TUN_PORT] = {.type = NLA_U32 },
e6445719
PS		 2067 };
2068 struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];
2069 int error;
2070
2071 error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX,
2072 attr, userspace_policy);
2073 if (error)
2074 return error;
2075
2076 if (!a[OVS_USERSPACE_ATTR_PID] ||
2077 !nla_get_u32(a[OVS_USERSPACE_ATTR_PID]))
2078 return -EINVAL;
2079
2080 return 0;
2081}
2082
2083static int copy_action(const struct nlattr *from,
05da5898 2084 struct sw_flow_actions **sfa, bool log)
e6445719
PS		 2085{
2086 int totlen = NLA_ALIGN(from->nla_len);
2087 struct nlattr *to;
2088
05da5898 2089 to = reserve_sfa_size(sfa, from->nla_len, log);
e6445719
PS		 2090 if (IS_ERR(to))
2091 return PTR_ERR(to);
2092
2093 memcpy(to, from, totlen);
2094 return 0;
2095}
2096
7f8a436e 2097static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
25cd9ba0
SH		 2098 const struct sw_flow_key *key,
2099 int depth, struct sw_flow_actions **sfa,
05da5898 2100 __be16 eth_type, __be16 vlan_tci, bool log)
e6445719
PS		 2101{
2102 const struct nlattr *a;
2103 int rem, err;
2104
2105 if (depth >= SAMPLE_ACTION_DEPTH)
2106 return -EOVERFLOW;
2107
2108 nla_for_each_nested(a, attr, rem) {
2109 /* Expected argument lengths, (u32)-1 for variable length. */
2110 static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {
2111 [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32),
971427f3 2112 [OVS_ACTION_ATTR_RECIRC] = sizeof(u32),
e6445719 2113 [OVS_ACTION_ATTR_USERSPACE] = (u32)-1,
25cd9ba0
SH		 2114 [OVS_ACTION_ATTR_PUSH_MPLS] = sizeof(struct ovs_action_push_mpls),
2115 [OVS_ACTION_ATTR_POP_MPLS] = sizeof(__be16),
e6445719
PS		 2116 [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan),
2117 [OVS_ACTION_ATTR_POP_VLAN] = 0,
2118 [OVS_ACTION_ATTR_SET] = (u32)-1,
83d2b9ba 2119 [OVS_ACTION_ATTR_SET_MASKED] = (u32)-1,
971427f3 2120 [OVS_ACTION_ATTR_SAMPLE] = (u32)-1,
7f8a436e
JS		 2121 [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash),
2122 [OVS_ACTION_ATTR_CT] = (u32)-1,
e6445719
PS		 2123 };
2124 const struct ovs_action_push_vlan *vlan;
2125 int type = nla_type(a);
2126 bool skip_copy;
2127
2128 if (type > OVS_ACTION_ATTR_MAX ||
2129 (action_lens[type] != nla_len(a) &&
2130 action_lens[type] != (u32)-1))
2131 return -EINVAL;
2132
2133 skip_copy = false;
2134 switch (type) {
2135 case OVS_ACTION_ATTR_UNSPEC:
2136 return -EINVAL;
2137
2138 case OVS_ACTION_ATTR_USERSPACE:
2139 err = validate_userspace(a);
2140 if (err)
2141 return err;
2142 break;
2143
2144 case OVS_ACTION_ATTR_OUTPUT:
2145 if (nla_get_u32(a) >= DP_MAX_PORTS)
2146 return -EINVAL;
2147 break;
2148
971427f3
AZ		 2149 case OVS_ACTION_ATTR_HASH: {
2150 const struct ovs_action_hash *act_hash = nla_data(a);
2151
2152 switch (act_hash->hash_alg) {
2153 case OVS_HASH_ALG_L4:
2154 break;
2155 default:
2156 return -EINVAL;
2157 }
2158
2159 break;
2160 }
e6445719
PS		 2161
2162 case OVS_ACTION_ATTR_POP_VLAN:
25cd9ba0 2163 vlan_tci = htons(0);
e6445719
PS		 2164 break;
2165
2166 case OVS_ACTION_ATTR_PUSH_VLAN:
2167 vlan = nla_data(a);
2168 if (vlan->vlan_tpid != htons(ETH_P_8021Q))
2169 return -EINVAL;
2170 if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT)))
2171 return -EINVAL;
25cd9ba0 2172 vlan_tci = vlan->vlan_tci;
e6445719
PS		 2173 break;
2174
971427f3
AZ		 2175 case OVS_ACTION_ATTR_RECIRC:
2176 break;
2177
25cd9ba0
SH		 2178 case OVS_ACTION_ATTR_PUSH_MPLS: {
2179 const struct ovs_action_push_mpls *mpls = nla_data(a);
2180
25cd9ba0
SH		 2181 if (!eth_p_mpls(mpls->mpls_ethertype))
2182 return -EINVAL;
2183 /* Prohibit push MPLS other than to a white list
2184 * for packets that have a known tag order.
2185 */
2186 if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
2187 (eth_type != htons(ETH_P_IP) &&
2188 eth_type != htons(ETH_P_IPV6) &&
2189 eth_type != htons(ETH_P_ARP) &&
2190 eth_type != htons(ETH_P_RARP) &&
2191 !eth_p_mpls(eth_type)))
2192 return -EINVAL;
2193 eth_type = mpls->mpls_ethertype;
2194 break;
2195 }
2196
2197 case OVS_ACTION_ATTR_POP_MPLS:
2198 if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
2199 !eth_p_mpls(eth_type))
2200 return -EINVAL;
2201
2202 /* Disallow subsequent L2.5+ set and mpls_pop actions
2203 * as there is no check here to ensure that the new
2204 * eth_type is valid and thus set actions could
2205 * write off the end of the packet or otherwise
2206 * corrupt it.
2207 *
2208 * Support for these actions is planned using packet
2209 * recirculation.
2210 */
2211 eth_type = htons(0);
2212 break;
2213
e6445719 2214 case OVS_ACTION_ATTR_SET:
25cd9ba0 2215 err = validate_set(a, key, sfa,
83d2b9ba
JR		 2216 &skip_copy, eth_type, false, log);
2217 if (err)
2218 return err;
2219 break;
2220
2221 case OVS_ACTION_ATTR_SET_MASKED:
2222 err = validate_set(a, key, sfa,
2223 &skip_copy, eth_type, true, log);
e6445719
PS		 2224 if (err)
2225 return err;
2226 break;
2227
2228 case OVS_ACTION_ATTR_SAMPLE:
7f8a436e 2229 err = validate_and_copy_sample(net, a, key, depth, sfa,
05da5898 2230 eth_type, vlan_tci, log);
e6445719
PS		 2231 if (err)
2232 return err;
2233 skip_copy = true;
2234 break;
2235
7f8a436e
JS		 2236 case OVS_ACTION_ATTR_CT:
2237 err = ovs_ct_copy_action(net, a, key, sfa, log);
2238 if (err)
2239 return err;
2240 skip_copy = true;
2241 break;
2242
e6445719 2243 default:
05da5898 2244 OVS_NLERR(log, "Unknown Action type %d", type);
e6445719
PS		 2245 return -EINVAL;
2246 }
2247 if (!skip_copy) {
05da5898 2248 err = copy_action(a, sfa, log);
e6445719
PS		 2249 if (err)
2250 return err;
2251 }
2252 }
2253
2254 if (rem > 0)
2255 return -EINVAL;
2256
2257 return 0;
2258}
2259
83d2b9ba 2260/* 'key' must be the masked key. */
7f8a436e 2261int ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
25cd9ba0 2262 const struct sw_flow_key *key,
05da5898 2263 struct sw_flow_actions **sfa, bool log)
25cd9ba0 2264{
2fdb957d
PS		 2265 int err;
2266
05da5898 2267 *sfa = nla_alloc_flow_actions(nla_len(attr), log);
2fdb957d
PS		 2268 if (IS_ERR(*sfa))
2269 return PTR_ERR(*sfa);
2270
8e2fed1c 2271 (*sfa)->orig_len = nla_len(attr);
7f8a436e 2272 err = __ovs_nla_copy_actions(net, attr, key, 0, sfa, key->eth.type,
05da5898 2273 key->eth.tci, log);
2fdb957d 2274 if (err)
34ae932a 2275 ovs_nla_free_flow_actions(*sfa);
2fdb957d
PS		 2276
2277 return err;
25cd9ba0
SH		 2278}
2279
e6445719
PS		 2280static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb)
2281{
2282 const struct nlattr *a;
2283 struct nlattr *start;
2284 int err = 0, rem;
2285
2286 start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE);
2287 if (!start)
2288 return -EMSGSIZE;
2289
2290 nla_for_each_nested(a, attr, rem) {
2291 int type = nla_type(a);
2292 struct nlattr *st_sample;
2293
2294 switch (type) {
2295 case OVS_SAMPLE_ATTR_PROBABILITY:
2296 if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY,
2297 sizeof(u32), nla_data(a)))
2298 return -EMSGSIZE;
2299 break;
2300 case OVS_SAMPLE_ATTR_ACTIONS:
2301 st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS);
2302 if (!st_sample)
2303 return -EMSGSIZE;
2304 err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb);
2305 if (err)
2306 return err;
2307 nla_nest_end(skb, st_sample);
2308 break;
2309 }
2310 }
2311
2312 nla_nest_end(skb, start);
2313 return err;
2314}
2315
2316static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb)
2317{
2318 const struct nlattr *ovs_key = nla_data(a);
2319 int key_type = nla_type(ovs_key);
2320 struct nlattr *start;
2321 int err;
2322
2323 switch (key_type) {
f0b128c1 2324 case OVS_KEY_ATTR_TUNNEL_INFO: {
34ae932a
TG		 2325 struct ovs_tunnel_info *ovs_tun = nla_data(ovs_key);
2326 struct ip_tunnel_info *tun_info = &ovs_tun->tun_dst->u.tun_info;
f0b128c1 2327
e6445719
PS		 2328 start = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
2329 if (!start)
2330 return -EMSGSIZE;
2331
1d8fff90 2332 err = ipv4_tun_to_nlattr(skb, &tun_info->key,
f5796684
JG		 2333 tun_info->options_len ?
2334 tun_info->options : NULL,
2335 tun_info->options_len);
e6445719
PS		 2336 if (err)
2337 return err;
2338 nla_nest_end(skb, start);
2339 break;
f0b128c1 2340 }
e6445719
PS		 2341 default:
2342 if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key))
2343 return -EMSGSIZE;
2344 break;
2345 }
2346
2347 return 0;
2348}
2349
83d2b9ba
JR		 2350static int masked_set_action_to_set_action_attr(const struct nlattr *a,
2351 struct sk_buff *skb)
2352{
2353 const struct nlattr *ovs_key = nla_data(a);
f4f8e738 2354 struct nlattr *nla;
83d2b9ba
JR		 2355 size_t key_len = nla_len(ovs_key) / 2;
2356
2357 /* Revert the conversion we did from a non-masked set action to
2358 * masked set action.
2359 */
f4f8e738
JS		 2360 nla = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
2361 if (!nla)
83d2b9ba
JR		 2362 return -EMSGSIZE;
2363
f4f8e738
JS		 2364 if (nla_put(skb, nla_type(ovs_key), key_len, nla_data(ovs_key)))
2365 return -EMSGSIZE;
2366
2367 nla_nest_end(skb, nla);
83d2b9ba
JR		 2368 return 0;
2369}
2370
e6445719
PS		 2371int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb)
2372{
2373 const struct nlattr *a;
2374 int rem, err;
2375
2376 nla_for_each_attr(a, attr, len, rem) {
2377 int type = nla_type(a);
2378
2379 switch (type) {
2380 case OVS_ACTION_ATTR_SET:
2381 err = set_action_to_attr(a, skb);
2382 if (err)
2383 return err;
2384 break;
2385
83d2b9ba
JR		 2386 case OVS_ACTION_ATTR_SET_TO_MASKED:
2387 err = masked_set_action_to_set_action_attr(a, skb);
2388 if (err)
2389 return err;
2390 break;
2391
e6445719
PS		 2392 case OVS_ACTION_ATTR_SAMPLE:
2393 err = sample_action_to_attr(a, skb);
2394 if (err)
2395 return err;
2396 break;
7f8a436e
JS		 2397
2398 case OVS_ACTION_ATTR_CT:
2399 err = ovs_ct_action_to_attr(nla_data(a), skb);
2400 if (err)
2401 return err;
2402 break;
2403
e6445719
PS		 2404 default:
2405 if (nla_put(skb, type, nla_len(a), nla_data(a)))
2406 return -EMSGSIZE;
2407 break;
2408 }
2409 }
2410
2411 return 0;
2412}
Linux kernel - Deliverables
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