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bnx2x: Prevent FW assertion when using Vxlan
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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
982b5270 60#define OVS_ATTR_VARIABLE -2
81bfe3c3 61
a85311bf
PS
62static void update_range(struct sw_flow_match *match,
63 size_t offset, size_t size, bool is_mask)
e6445719 64{
a85311bf 65 struct sw_flow_key_range *range;
e6445719
PS
66 size_t start = rounddown(offset, sizeof(long));
67 size_t end = roundup(offset + size, sizeof(long));
68
69 if (!is_mask)
70 range = &match->range;
a85311bf 71 else
e6445719
PS
72 range = &match->mask->range;
73
e6445719
PS
74 if (range->start == range->end) {
75 range->start = start;
76 range->end = end;
77 return;
78 }
79
80 if (range->start > start)
81 range->start = start;
82
83 if (range->end < end)
84 range->end = end;
85}
86
87#define SW_FLOW_KEY_PUT(match, field, value, is_mask) \
88 do { \
a85311bf
PS
89 update_range(match, offsetof(struct sw_flow_key, field), \
90 sizeof((match)->key->field), is_mask); \
91 if (is_mask) \
92 (match)->mask->key.field = value; \
93 else \
e6445719 94 (match)->key->field = value; \
e6445719
PS
95 } while (0)
96
f5796684
JG
97#define SW_FLOW_KEY_MEMCPY_OFFSET(match, offset, value_p, len, is_mask) \
98 do { \
a85311bf 99 update_range(match, offset, len, is_mask); \
f5796684
JG
100 if (is_mask) \
101 memcpy((u8 *)&(match)->mask->key + offset, value_p, \
a85311bf 102 len); \
f5796684
JG
103 else \
104 memcpy((u8 *)(match)->key + offset, value_p, len); \
e6445719
PS
105 } while (0)
106
f5796684
JG
107#define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \
108 SW_FLOW_KEY_MEMCPY_OFFSET(match, offsetof(struct sw_flow_key, field), \
109 value_p, len, is_mask)
110
a85311bf
PS
111#define SW_FLOW_KEY_MEMSET_FIELD(match, field, value, is_mask) \
112 do { \
113 update_range(match, offsetof(struct sw_flow_key, field), \
114 sizeof((match)->key->field), is_mask); \
115 if (is_mask) \
116 memset((u8 *)&(match)->mask->key.field, value, \
117 sizeof((match)->mask->key.field)); \
118 else \
f47de068
PS
119 memset((u8 *)&(match)->key->field, value, \
120 sizeof((match)->key->field)); \
f47de068 121 } while (0)
e6445719
PS
122
123static bool match_validate(const struct sw_flow_match *match,
05da5898 124 u64 key_attrs, u64 mask_attrs, bool log)
e6445719
PS
125{
126 u64 key_expected = 1 << 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 &= ~((1 << OVS_KEY_ATTR_IPV4)
132 | (1 << OVS_KEY_ATTR_IPV6)
133 | (1 << OVS_KEY_ATTR_TCP)
5eb26b15 134 | (1 << OVS_KEY_ATTR_TCP_FLAGS)
e6445719
PS
135 | (1 << OVS_KEY_ATTR_UDP)
136 | (1 << OVS_KEY_ATTR_SCTP)
137 | (1 << OVS_KEY_ATTR_ICMP)
138 | (1 << OVS_KEY_ATTR_ICMPV6)
139 | (1 << OVS_KEY_ATTR_ARP)
25cd9ba0
SH
140 | (1 << OVS_KEY_ATTR_ND)
141 | (1 << OVS_KEY_ATTR_MPLS));
e6445719
PS
142
143 /* Always allowed mask fields. */
144 mask_allowed |= ((1 << OVS_KEY_ATTR_TUNNEL)
145 | (1 << OVS_KEY_ATTR_IN_PORT)
146 | (1 << 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 |= 1 << OVS_KEY_ATTR_ARP;
f2a01517 152 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
e6445719
PS
153 mask_allowed |= 1 << OVS_KEY_ATTR_ARP;
154 }
155
25cd9ba0
SH
156 if (eth_p_mpls(match->key->eth.type)) {
157 key_expected |= 1 << OVS_KEY_ATTR_MPLS;
158 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
159 mask_allowed |= 1 << OVS_KEY_ATTR_MPLS;
160 }
161
e6445719
PS
162 if (match->key->eth.type == htons(ETH_P_IP)) {
163 key_expected |= 1 << OVS_KEY_ATTR_IPV4;
164 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
165 mask_allowed |= 1 << OVS_KEY_ATTR_IPV4;
166
167 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
168 if (match->key->ip.proto == IPPROTO_UDP) {
169 key_expected |= 1 << OVS_KEY_ATTR_UDP;
170 if (match->mask && (match->mask->key.ip.proto == 0xff))
171 mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
172 }
173
174 if (match->key->ip.proto == IPPROTO_SCTP) {
175 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
176 if (match->mask && (match->mask->key.ip.proto == 0xff))
177 mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
178 }
179
180 if (match->key->ip.proto == IPPROTO_TCP) {
181 key_expected |= 1 << OVS_KEY_ATTR_TCP;
5eb26b15
JR
182 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
183 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
e6445719 184 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
5eb26b15
JR
185 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
186 }
e6445719
PS
187 }
188
189 if (match->key->ip.proto == IPPROTO_ICMP) {
190 key_expected |= 1 << OVS_KEY_ATTR_ICMP;
191 if (match->mask && (match->mask->key.ip.proto == 0xff))
192 mask_allowed |= 1 << OVS_KEY_ATTR_ICMP;
193 }
194 }
195 }
196
197 if (match->key->eth.type == htons(ETH_P_IPV6)) {
198 key_expected |= 1 << OVS_KEY_ATTR_IPV6;
199 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
200 mask_allowed |= 1 << OVS_KEY_ATTR_IPV6;
201
202 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
203 if (match->key->ip.proto == IPPROTO_UDP) {
204 key_expected |= 1 << OVS_KEY_ATTR_UDP;
205 if (match->mask && (match->mask->key.ip.proto == 0xff))
206 mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
207 }
208
209 if (match->key->ip.proto == IPPROTO_SCTP) {
210 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
211 if (match->mask && (match->mask->key.ip.proto == 0xff))
212 mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
213 }
214
215 if (match->key->ip.proto == IPPROTO_TCP) {
216 key_expected |= 1 << OVS_KEY_ATTR_TCP;
5eb26b15
JR
217 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
218 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
e6445719 219 mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
5eb26b15
JR
220 mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
221 }
e6445719
PS
222 }
223
224 if (match->key->ip.proto == IPPROTO_ICMPV6) {
225 key_expected |= 1 << OVS_KEY_ATTR_ICMPV6;
226 if (match->mask && (match->mask->key.ip.proto == 0xff))
227 mask_allowed |= 1 << OVS_KEY_ATTR_ICMPV6;
228
1139e241 229 if (match->key->tp.src ==
e6445719 230 htons(NDISC_NEIGHBOUR_SOLICITATION) ||
1139e241 231 match->key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) {
e6445719 232 key_expected |= 1 << OVS_KEY_ATTR_ND;
f2a01517 233 if (match->mask && (match->mask->key.tp.src == htons(0xff)))
e6445719
PS
234 mask_allowed |= 1 << OVS_KEY_ATTR_ND;
235 }
236 }
237 }
238 }
239
240 if ((key_attrs & key_expected) != key_expected) {
241 /* Key attributes check failed. */
05da5898
JR
242 OVS_NLERR(log, "Missing key (keys=%llx, expected=%llx)",
243 (unsigned long long)key_attrs,
244 (unsigned long long)key_expected);
e6445719
PS
245 return false;
246 }
247
248 if ((mask_attrs & mask_allowed) != mask_attrs) {
249 /* Mask attributes check failed. */
05da5898
JR
250 OVS_NLERR(log, "Unexpected mask (mask=%llx, allowed=%llx)",
251 (unsigned long long)mask_attrs,
252 (unsigned long long)mask_allowed);
e6445719
PS
253 return false;
254 }
255
256 return true;
257}
258
8f0aad6f
WZ
259size_t ovs_tun_key_attr_size(void)
260{
261 /* Whenever adding new OVS_TUNNEL_KEY_ FIELDS, we should consider
262 * updating this function.
263 */
264 return nla_total_size(8) /* OVS_TUNNEL_KEY_ATTR_ID */
6b26ba3a
JB
265 + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_SRC */
266 + nla_total_size(16) /* OVS_TUNNEL_KEY_ATTR_IPV[46]_DST */
8f0aad6f
WZ
267 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TOS */
268 + nla_total_size(1) /* OVS_TUNNEL_KEY_ATTR_TTL */
269 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */
270 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_CSUM */
271 + nla_total_size(0) /* OVS_TUNNEL_KEY_ATTR_OAM */
272 + nla_total_size(256) /* OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS */
1dd144cf
TG
273 /* OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS is mutually exclusive with
274 * OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS and covered by it.
275 */
8f0aad6f
WZ
276 + nla_total_size(2) /* OVS_TUNNEL_KEY_ATTR_TP_SRC */
277 + nla_total_size(2); /* OVS_TUNNEL_KEY_ATTR_TP_DST */
278}
279
41af73e9
JS
280size_t ovs_key_attr_size(void)
281{
282 /* Whenever adding new OVS_KEY_ FIELDS, we should consider
283 * updating this function.
284 */
c2ac6673 285 BUILD_BUG_ON(OVS_KEY_ATTR_TUNNEL_INFO != 26);
41af73e9
JS
286
287 return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */
288 + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */
8f0aad6f 289 + ovs_tun_key_attr_size()
41af73e9
JS
290 + nla_total_size(4) /* OVS_KEY_ATTR_IN_PORT */
291 + nla_total_size(4) /* OVS_KEY_ATTR_SKB_MARK */
292 + nla_total_size(4) /* OVS_KEY_ATTR_DP_HASH */
293 + nla_total_size(4) /* OVS_KEY_ATTR_RECIRC_ID */
fbccce59 294 + nla_total_size(4) /* OVS_KEY_ATTR_CT_STATE */
7f8a436e 295 + nla_total_size(2) /* OVS_KEY_ATTR_CT_ZONE */
182e3042 296 + nla_total_size(4) /* OVS_KEY_ATTR_CT_MARK */
33db4125 297 + nla_total_size(16) /* OVS_KEY_ATTR_CT_LABELS */
41af73e9
JS
298 + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */
299 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
300 + nla_total_size(4) /* OVS_KEY_ATTR_VLAN */
301 + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */
302 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
303 + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */
304 + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */
305 + nla_total_size(28); /* OVS_KEY_ATTR_ND */
306}
307
982b5270
JG
308static const struct ovs_len_tbl ovs_vxlan_ext_key_lens[OVS_VXLAN_EXT_MAX + 1] = {
309 [OVS_VXLAN_EXT_GBP] = { .len = sizeof(u32) },
310};
311
81bfe3c3
TG
312static const struct ovs_len_tbl ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = {
313 [OVS_TUNNEL_KEY_ATTR_ID] = { .len = sizeof(u64) },
314 [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = { .len = sizeof(u32) },
315 [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = { .len = sizeof(u32) },
316 [OVS_TUNNEL_KEY_ATTR_TOS] = { .len = 1 },
317 [OVS_TUNNEL_KEY_ATTR_TTL] = { .len = 1 },
318 [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = { .len = 0 },
319 [OVS_TUNNEL_KEY_ATTR_CSUM] = { .len = 0 },
320 [OVS_TUNNEL_KEY_ATTR_TP_SRC] = { .len = sizeof(u16) },
321 [OVS_TUNNEL_KEY_ATTR_TP_DST] = { .len = sizeof(u16) },
322 [OVS_TUNNEL_KEY_ATTR_OAM] = { .len = 0 },
982b5270
JG
323 [OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS] = { .len = OVS_ATTR_VARIABLE },
324 [OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS] = { .len = OVS_ATTR_NESTED,
325 .next = ovs_vxlan_ext_key_lens },
6b26ba3a
JB
326 [OVS_TUNNEL_KEY_ATTR_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
327 [OVS_TUNNEL_KEY_ATTR_IPV6_DST] = { .len = sizeof(struct in6_addr) },
81bfe3c3
TG
328};
329
e6445719 330/* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */
81bfe3c3
TG
331static const struct ovs_len_tbl ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = {
332 [OVS_KEY_ATTR_ENCAP] = { .len = OVS_ATTR_NESTED },
333 [OVS_KEY_ATTR_PRIORITY] = { .len = sizeof(u32) },
334 [OVS_KEY_ATTR_IN_PORT] = { .len = sizeof(u32) },
335 [OVS_KEY_ATTR_SKB_MARK] = { .len = sizeof(u32) },
336 [OVS_KEY_ATTR_ETHERNET] = { .len = sizeof(struct ovs_key_ethernet) },
337 [OVS_KEY_ATTR_VLAN] = { .len = sizeof(__be16) },
338 [OVS_KEY_ATTR_ETHERTYPE] = { .len = sizeof(__be16) },
339 [OVS_KEY_ATTR_IPV4] = { .len = sizeof(struct ovs_key_ipv4) },
340 [OVS_KEY_ATTR_IPV6] = { .len = sizeof(struct ovs_key_ipv6) },
341 [OVS_KEY_ATTR_TCP] = { .len = sizeof(struct ovs_key_tcp) },
342 [OVS_KEY_ATTR_TCP_FLAGS] = { .len = sizeof(__be16) },
343 [OVS_KEY_ATTR_UDP] = { .len = sizeof(struct ovs_key_udp) },
344 [OVS_KEY_ATTR_SCTP] = { .len = sizeof(struct ovs_key_sctp) },
345 [OVS_KEY_ATTR_ICMP] = { .len = sizeof(struct ovs_key_icmp) },
346 [OVS_KEY_ATTR_ICMPV6] = { .len = sizeof(struct ovs_key_icmpv6) },
347 [OVS_KEY_ATTR_ARP] = { .len = sizeof(struct ovs_key_arp) },
348 [OVS_KEY_ATTR_ND] = { .len = sizeof(struct ovs_key_nd) },
349 [OVS_KEY_ATTR_RECIRC_ID] = { .len = sizeof(u32) },
350 [OVS_KEY_ATTR_DP_HASH] = { .len = sizeof(u32) },
351 [OVS_KEY_ATTR_TUNNEL] = { .len = OVS_ATTR_NESTED,
352 .next = ovs_tunnel_key_lens, },
353 [OVS_KEY_ATTR_MPLS] = { .len = sizeof(struct ovs_key_mpls) },
fbccce59 354 [OVS_KEY_ATTR_CT_STATE] = { .len = sizeof(u32) },
7f8a436e 355 [OVS_KEY_ATTR_CT_ZONE] = { .len = sizeof(u16) },
182e3042 356 [OVS_KEY_ATTR_CT_MARK] = { .len = sizeof(u32) },
33db4125 357 [OVS_KEY_ATTR_CT_LABELS] = { .len = sizeof(struct ovs_key_ct_labels) },
e6445719
PS
358};
359
982b5270
JG
360static bool check_attr_len(unsigned int attr_len, unsigned int expected_len)
361{
362 return expected_len == attr_len ||
363 expected_len == OVS_ATTR_NESTED ||
364 expected_len == OVS_ATTR_VARIABLE;
365}
366
e6445719
PS
367static bool is_all_zero(const u8 *fp, size_t size)
368{
369 int i;
370
371 if (!fp)
372 return false;
373
374 for (i = 0; i < size; i++)
375 if (fp[i])
376 return false;
377
378 return true;
379}
380
381static int __parse_flow_nlattrs(const struct nlattr *attr,
382 const struct nlattr *a[],
05da5898 383 u64 *attrsp, bool log, bool nz)
e6445719
PS
384{
385 const struct nlattr *nla;
386 u64 attrs;
387 int rem;
388
389 attrs = *attrsp;
390 nla_for_each_nested(nla, attr, rem) {
391 u16 type = nla_type(nla);
392 int expected_len;
393
394 if (type > OVS_KEY_ATTR_MAX) {
05da5898 395 OVS_NLERR(log, "Key type %d is out of range max %d",
e6445719
PS
396 type, OVS_KEY_ATTR_MAX);
397 return -EINVAL;
398 }
399
400 if (attrs & (1 << type)) {
05da5898 401 OVS_NLERR(log, "Duplicate key (type %d).", type);
e6445719
PS
402 return -EINVAL;
403 }
404
81bfe3c3 405 expected_len = ovs_key_lens[type].len;
982b5270 406 if (!check_attr_len(nla_len(nla), expected_len)) {
05da5898
JR
407 OVS_NLERR(log, "Key %d has unexpected len %d expected %d",
408 type, nla_len(nla), expected_len);
e6445719
PS
409 return -EINVAL;
410 }
411
412 if (!nz || !is_all_zero(nla_data(nla), expected_len)) {
413 attrs |= 1 << type;
414 a[type] = nla;
415 }
416 }
417 if (rem) {
05da5898 418 OVS_NLERR(log, "Message has %d unknown bytes.", rem);
e6445719
PS
419 return -EINVAL;
420 }
421
422 *attrsp = attrs;
423 return 0;
424}
425
426static int parse_flow_mask_nlattrs(const struct nlattr *attr,
05da5898
JR
427 const struct nlattr *a[], u64 *attrsp,
428 bool log)
e6445719 429{
05da5898 430 return __parse_flow_nlattrs(attr, a, attrsp, log, true);
e6445719
PS
431}
432
433static int parse_flow_nlattrs(const struct nlattr *attr,
05da5898
JR
434 const struct nlattr *a[], u64 *attrsp,
435 bool log)
e6445719 436{
05da5898
JR
437 return __parse_flow_nlattrs(attr, a, attrsp, log, false);
438}
439
440static int genev_tun_opt_from_nlattr(const struct nlattr *a,
441 struct sw_flow_match *match, bool is_mask,
442 bool log)
443{
444 unsigned long opt_key_offset;
445
446 if (nla_len(a) > sizeof(match->key->tun_opts)) {
447 OVS_NLERR(log, "Geneve option length err (len %d, max %zu).",
448 nla_len(a), sizeof(match->key->tun_opts));
449 return -EINVAL;
450 }
451
452 if (nla_len(a) % 4 != 0) {
453 OVS_NLERR(log, "Geneve opt len %d is not a multiple of 4.",
454 nla_len(a));
455 return -EINVAL;
456 }
457
458 /* We need to record the length of the options passed
459 * down, otherwise packets with the same format but
460 * additional options will be silently matched.
461 */
462 if (!is_mask) {
463 SW_FLOW_KEY_PUT(match, tun_opts_len, nla_len(a),
464 false);
465 } else {
466 /* This is somewhat unusual because it looks at
467 * both the key and mask while parsing the
468 * attributes (and by extension assumes the key
469 * is parsed first). Normally, we would verify
470 * that each is the correct length and that the
471 * attributes line up in the validate function.
472 * However, that is difficult because this is
473 * variable length and we won't have the
474 * information later.
475 */
476 if (match->key->tun_opts_len != nla_len(a)) {
477 OVS_NLERR(log, "Geneve option len %d != mask len %d",
478 match->key->tun_opts_len, nla_len(a));
479 return -EINVAL;
480 }
481
482 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
483 }
484
d91641d9 485 opt_key_offset = TUN_METADATA_OFFSET(nla_len(a));
05da5898
JR
486 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, nla_data(a),
487 nla_len(a), is_mask);
488 return 0;
e6445719
PS
489}
490
982b5270 491static int vxlan_tun_opt_from_nlattr(const struct nlattr *attr,
1dd144cf
TG
492 struct sw_flow_match *match, bool is_mask,
493 bool log)
494{
982b5270
JG
495 struct nlattr *a;
496 int rem;
1dd144cf 497 unsigned long opt_key_offset;
614732ea 498 struct vxlan_metadata opts;
1dd144cf
TG
499
500 BUILD_BUG_ON(sizeof(opts) > sizeof(match->key->tun_opts));
501
1dd144cf 502 memset(&opts, 0, sizeof(opts));
982b5270
JG
503 nla_for_each_nested(a, attr, rem) {
504 int type = nla_type(a);
1dd144cf 505
982b5270
JG
506 if (type > OVS_VXLAN_EXT_MAX) {
507 OVS_NLERR(log, "VXLAN extension %d out of range max %d",
508 type, OVS_VXLAN_EXT_MAX);
509 return -EINVAL;
510 }
511
512 if (!check_attr_len(nla_len(a),
513 ovs_vxlan_ext_key_lens[type].len)) {
514 OVS_NLERR(log, "VXLAN extension %d has unexpected len %d expected %d",
515 type, nla_len(a),
516 ovs_vxlan_ext_key_lens[type].len);
517 return -EINVAL;
518 }
519
520 switch (type) {
521 case OVS_VXLAN_EXT_GBP:
522 opts.gbp = nla_get_u32(a);
523 break;
524 default:
525 OVS_NLERR(log, "Unknown VXLAN extension attribute %d",
526 type);
527 return -EINVAL;
528 }
529 }
530 if (rem) {
531 OVS_NLERR(log, "VXLAN extension message has %d unknown bytes.",
532 rem);
533 return -EINVAL;
534 }
1dd144cf
TG
535
536 if (!is_mask)
537 SW_FLOW_KEY_PUT(match, tun_opts_len, sizeof(opts), false);
538 else
539 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
540
541 opt_key_offset = TUN_METADATA_OFFSET(sizeof(opts));
542 SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, &opts, sizeof(opts),
543 is_mask);
544 return 0;
545}
546
6b26ba3a
JB
547static int ip_tun_from_nlattr(const struct nlattr *attr,
548 struct sw_flow_match *match, bool is_mask,
549 bool log)
e6445719 550{
99e28f18
PS
551 bool ttl = false, ipv4 = false, ipv6 = false;
552 __be16 tun_flags = 0;
553 int opts_type = 0;
e6445719
PS
554 struct nlattr *a;
555 int rem;
e6445719
PS
556
557 nla_for_each_nested(a, attr, rem) {
558 int type = nla_type(a);
05da5898
JR
559 int err;
560
e6445719 561 if (type > OVS_TUNNEL_KEY_ATTR_MAX) {
05da5898
JR
562 OVS_NLERR(log, "Tunnel attr %d out of range max %d",
563 type, OVS_TUNNEL_KEY_ATTR_MAX);
e6445719
PS
564 return -EINVAL;
565 }
566
982b5270
JG
567 if (!check_attr_len(nla_len(a),
568 ovs_tunnel_key_lens[type].len)) {
05da5898 569 OVS_NLERR(log, "Tunnel attr %d has unexpected len %d expected %d",
81bfe3c3 570 type, nla_len(a), ovs_tunnel_key_lens[type].len);
e6445719
PS
571 return -EINVAL;
572 }
573
574 switch (type) {
575 case OVS_TUNNEL_KEY_ATTR_ID:
576 SW_FLOW_KEY_PUT(match, tun_key.tun_id,
577 nla_get_be64(a), is_mask);
578 tun_flags |= TUNNEL_KEY;
579 break;
580 case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
c1ea5d67 581 SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.src,
67b61f6c 582 nla_get_in_addr(a), is_mask);
6b26ba3a 583 ipv4 = true;
e6445719
PS
584 break;
585 case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
c1ea5d67 586 SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.dst,
67b61f6c 587 nla_get_in_addr(a), is_mask);
6b26ba3a
JB
588 ipv4 = true;
589 break;
590 case OVS_TUNNEL_KEY_ATTR_IPV6_SRC:
591 SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.dst,
592 nla_get_in6_addr(a), is_mask);
593 ipv6 = true;
594 break;
595 case OVS_TUNNEL_KEY_ATTR_IPV6_DST:
596 SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.dst,
597 nla_get_in6_addr(a), is_mask);
598 ipv6 = true;
e6445719
PS
599 break;
600 case OVS_TUNNEL_KEY_ATTR_TOS:
7c383fb2 601 SW_FLOW_KEY_PUT(match, tun_key.tos,
e6445719
PS
602 nla_get_u8(a), is_mask);
603 break;
604 case OVS_TUNNEL_KEY_ATTR_TTL:
7c383fb2 605 SW_FLOW_KEY_PUT(match, tun_key.ttl,
e6445719
PS
606 nla_get_u8(a), is_mask);
607 ttl = true;
608 break;
609 case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
610 tun_flags |= TUNNEL_DONT_FRAGMENT;
611 break;
612 case OVS_TUNNEL_KEY_ATTR_CSUM:
613 tun_flags |= TUNNEL_CSUM;
614 break;
8f0aad6f
WZ
615 case OVS_TUNNEL_KEY_ATTR_TP_SRC:
616 SW_FLOW_KEY_PUT(match, tun_key.tp_src,
617 nla_get_be16(a), is_mask);
618 break;
619 case OVS_TUNNEL_KEY_ATTR_TP_DST:
620 SW_FLOW_KEY_PUT(match, tun_key.tp_dst,
621 nla_get_be16(a), is_mask);
622 break;
67fa0341
JG
623 case OVS_TUNNEL_KEY_ATTR_OAM:
624 tun_flags |= TUNNEL_OAM;
625 break;
f5796684 626 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
1dd144cf
TG
627 if (opts_type) {
628 OVS_NLERR(log, "Multiple metadata blocks provided");
629 return -EINVAL;
630 }
631
05da5898
JR
632 err = genev_tun_opt_from_nlattr(a, match, is_mask, log);
633 if (err)
634 return err;
f5796684 635
1dd144cf
TG
636 tun_flags |= TUNNEL_GENEVE_OPT;
637 opts_type = type;
638 break;
639 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
640 if (opts_type) {
641 OVS_NLERR(log, "Multiple metadata blocks provided");
642 return -EINVAL;
643 }
644
645 err = vxlan_tun_opt_from_nlattr(a, match, is_mask, log);
646 if (err)
647 return err;
648
649 tun_flags |= TUNNEL_VXLAN_OPT;
650 opts_type = type;
f5796684 651 break;
e6445719 652 default:
6b26ba3a 653 OVS_NLERR(log, "Unknown IP tunnel attribute %d",
f5796684 654 type);
e6445719
PS
655 return -EINVAL;
656 }
657 }
658
659 SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask);
00a93bab
JB
660 if (is_mask)
661 SW_FLOW_KEY_MEMSET_FIELD(match, tun_proto, 0xff, true);
662 else
6b26ba3a
JB
663 SW_FLOW_KEY_PUT(match, tun_proto, ipv6 ? AF_INET6 : AF_INET,
664 false);
e6445719
PS
665
666 if (rem > 0) {
6b26ba3a 667 OVS_NLERR(log, "IP tunnel attribute has %d unknown bytes.",
05da5898 668 rem);
e6445719
PS
669 return -EINVAL;
670 }
671
6b26ba3a
JB
672 if (ipv4 && ipv6) {
673 OVS_NLERR(log, "Mixed IPv4 and IPv6 tunnel attributes");
674 return -EINVAL;
675 }
676
e6445719 677 if (!is_mask) {
6b26ba3a
JB
678 if (!ipv4 && !ipv6) {
679 OVS_NLERR(log, "IP tunnel dst address not specified");
680 return -EINVAL;
681 }
682 if (ipv4 && !match->key->tun_key.u.ipv4.dst) {
05da5898 683 OVS_NLERR(log, "IPv4 tunnel dst address is zero");
e6445719
PS
684 return -EINVAL;
685 }
6b26ba3a
JB
686 if (ipv6 && ipv6_addr_any(&match->key->tun_key.u.ipv6.dst)) {
687 OVS_NLERR(log, "IPv6 tunnel dst address is zero");
688 return -EINVAL;
689 }
e6445719
PS
690
691 if (!ttl) {
6b26ba3a 692 OVS_NLERR(log, "IP tunnel TTL not specified.");
e6445719
PS
693 return -EINVAL;
694 }
695 }
696
1dd144cf
TG
697 return opts_type;
698}
699
700static int vxlan_opt_to_nlattr(struct sk_buff *skb,
701 const void *tun_opts, int swkey_tun_opts_len)
702{
614732ea 703 const struct vxlan_metadata *opts = tun_opts;
1dd144cf
TG
704 struct nlattr *nla;
705
706 nla = nla_nest_start(skb, OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS);
707 if (!nla)
708 return -EMSGSIZE;
709
710 if (nla_put_u32(skb, OVS_VXLAN_EXT_GBP, opts->gbp) < 0)
711 return -EMSGSIZE;
712
713 nla_nest_end(skb, nla);
e6445719
PS
714 return 0;
715}
716
6b26ba3a
JB
717static int __ip_tun_to_nlattr(struct sk_buff *skb,
718 const struct ip_tunnel_key *output,
719 const void *tun_opts, int swkey_tun_opts_len,
720 unsigned short tun_proto)
e6445719 721{
e6445719
PS
722 if (output->tun_flags & TUNNEL_KEY &&
723 nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id))
724 return -EMSGSIZE;
6b26ba3a
JB
725 switch (tun_proto) {
726 case AF_INET:
727 if (output->u.ipv4.src &&
728 nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC,
729 output->u.ipv4.src))
730 return -EMSGSIZE;
731 if (output->u.ipv4.dst &&
732 nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST,
733 output->u.ipv4.dst))
734 return -EMSGSIZE;
735 break;
736 case AF_INET6:
737 if (!ipv6_addr_any(&output->u.ipv6.src) &&
738 nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_SRC,
739 &output->u.ipv6.src))
740 return -EMSGSIZE;
741 if (!ipv6_addr_any(&output->u.ipv6.dst) &&
742 nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_DST,
743 &output->u.ipv6.dst))
744 return -EMSGSIZE;
745 break;
746 }
7c383fb2
JB
747 if (output->tos &&
748 nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->tos))
e6445719 749 return -EMSGSIZE;
7c383fb2 750 if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ttl))
e6445719
PS
751 return -EMSGSIZE;
752 if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) &&
67fa0341 753 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT))
e6445719
PS
754 return -EMSGSIZE;
755 if ((output->tun_flags & TUNNEL_CSUM) &&
67fa0341
JG
756 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM))
757 return -EMSGSIZE;
8f0aad6f
WZ
758 if (output->tp_src &&
759 nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_SRC, output->tp_src))
760 return -EMSGSIZE;
761 if (output->tp_dst &&
762 nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_DST, output->tp_dst))
763 return -EMSGSIZE;
67fa0341
JG
764 if ((output->tun_flags & TUNNEL_OAM) &&
765 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM))
e6445719 766 return -EMSGSIZE;
fc4099f1 767 if (swkey_tun_opts_len) {
1dd144cf
TG
768 if (output->tun_flags & TUNNEL_GENEVE_OPT &&
769 nla_put(skb, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS,
770 swkey_tun_opts_len, tun_opts))
771 return -EMSGSIZE;
772 else if (output->tun_flags & TUNNEL_VXLAN_OPT &&
773 vxlan_opt_to_nlattr(skb, tun_opts, swkey_tun_opts_len))
774 return -EMSGSIZE;
775 }
e6445719 776
e6445719
PS
777 return 0;
778}
779
6b26ba3a
JB
780static int ip_tun_to_nlattr(struct sk_buff *skb,
781 const struct ip_tunnel_key *output,
782 const void *tun_opts, int swkey_tun_opts_len,
783 unsigned short tun_proto)
f5796684
JG
784{
785 struct nlattr *nla;
786 int err;
787
788 nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL);
789 if (!nla)
790 return -EMSGSIZE;
791
6b26ba3a
JB
792 err = __ip_tun_to_nlattr(skb, output, tun_opts, swkey_tun_opts_len,
793 tun_proto);
f5796684
JG
794 if (err)
795 return err;
796
797 nla_nest_end(skb, nla);
798 return 0;
799}
800
fc4099f1
PS
801int ovs_nla_put_tunnel_info(struct sk_buff *skb,
802 struct ip_tunnel_info *tun_info)
8f0aad6f 803{
ba3e2084
DM
804 return __ip_tun_to_nlattr(skb, &tun_info->key,
805 ip_tunnel_info_opts(tun_info),
806 tun_info->options_len,
807 ip_tunnel_info_af(tun_info));
8f0aad6f
WZ
808}
809
c2ac6673
JS
810static int metadata_from_nlattrs(struct net *net, struct sw_flow_match *match,
811 u64 *attrs, const struct nlattr **a,
812 bool is_mask, bool log)
e6445719 813{
971427f3
AZ
814 if (*attrs & (1 << OVS_KEY_ATTR_DP_HASH)) {
815 u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]);
816
817 SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask);
818 *attrs &= ~(1 << OVS_KEY_ATTR_DP_HASH);
819 }
820
821 if (*attrs & (1 << OVS_KEY_ATTR_RECIRC_ID)) {
822 u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]);
823
824 SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask);
825 *attrs &= ~(1 << OVS_KEY_ATTR_RECIRC_ID);
826 }
827
e6445719
PS
828 if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) {
829 SW_FLOW_KEY_PUT(match, phy.priority,
830 nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask);
831 *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY);
832 }
833
834 if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) {
835 u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]);
836
426cda5c 837 if (is_mask) {
e6445719 838 in_port = 0xffffffff; /* Always exact match in_port. */
426cda5c 839 } else if (in_port >= DP_MAX_PORTS) {
05da5898 840 OVS_NLERR(log, "Port %d exceeds max allowable %d",
426cda5c 841 in_port, DP_MAX_PORTS);
e6445719 842 return -EINVAL;
426cda5c 843 }
e6445719
PS
844
845 SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask);
846 *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT);
847 } else if (!is_mask) {
848 SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask);
849 }
850
851 if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) {
852 uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]);
853
854 SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask);
855 *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK);
856 }
857 if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) {
6b26ba3a
JB
858 if (ip_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match,
859 is_mask, log) < 0)
e6445719
PS
860 return -EINVAL;
861 *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL);
862 }
7f8a436e
JS
863
864 if (*attrs & (1 << OVS_KEY_ATTR_CT_STATE) &&
c2ac6673 865 ovs_ct_verify(net, OVS_KEY_ATTR_CT_STATE)) {
fbccce59 866 u32 ct_state = nla_get_u32(a[OVS_KEY_ATTR_CT_STATE]);
7f8a436e 867
9e384715 868 if (ct_state & ~CT_SUPPORTED_MASK) {
fbccce59 869 OVS_NLERR(log, "ct_state flags %08x unsupported",
6f225952
JS
870 ct_state);
871 return -EINVAL;
872 }
7f8a436e
JS
873
874 SW_FLOW_KEY_PUT(match, ct.state, ct_state, is_mask);
875 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_STATE);
876 }
877 if (*attrs & (1 << OVS_KEY_ATTR_CT_ZONE) &&
c2ac6673 878 ovs_ct_verify(net, OVS_KEY_ATTR_CT_ZONE)) {
7f8a436e
JS
879 u16 ct_zone = nla_get_u16(a[OVS_KEY_ATTR_CT_ZONE]);
880
881 SW_FLOW_KEY_PUT(match, ct.zone, ct_zone, is_mask);
882 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ZONE);
883 }
182e3042 884 if (*attrs & (1 << OVS_KEY_ATTR_CT_MARK) &&
c2ac6673 885 ovs_ct_verify(net, OVS_KEY_ATTR_CT_MARK)) {
182e3042
JS
886 u32 mark = nla_get_u32(a[OVS_KEY_ATTR_CT_MARK]);
887
888 SW_FLOW_KEY_PUT(match, ct.mark, mark, is_mask);
889 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_MARK);
890 }
33db4125
JS
891 if (*attrs & (1 << OVS_KEY_ATTR_CT_LABELS) &&
892 ovs_ct_verify(net, OVS_KEY_ATTR_CT_LABELS)) {
893 const struct ovs_key_ct_labels *cl;
c2ac6673 894
33db4125
JS
895 cl = nla_data(a[OVS_KEY_ATTR_CT_LABELS]);
896 SW_FLOW_KEY_MEMCPY(match, ct.labels, cl->ct_labels,
c2ac6673 897 sizeof(*cl), is_mask);
33db4125 898 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_LABELS);
c2ac6673 899 }
e6445719
PS
900 return 0;
901}
902
c2ac6673
JS
903static int ovs_key_from_nlattrs(struct net *net, struct sw_flow_match *match,
904 u64 attrs, const struct nlattr **a,
905 bool is_mask, bool log)
e6445719
PS
906{
907 int err;
e6445719 908
c2ac6673 909 err = metadata_from_nlattrs(net, match, &attrs, a, is_mask, log);
e6445719
PS
910 if (err)
911 return err;
912
913 if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) {
914 const struct ovs_key_ethernet *eth_key;
915
916 eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]);
917 SW_FLOW_KEY_MEMCPY(match, eth.src,
918 eth_key->eth_src, ETH_ALEN, is_mask);
919 SW_FLOW_KEY_MEMCPY(match, eth.dst,
920 eth_key->eth_dst, ETH_ALEN, is_mask);
921 attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET);
922 }
923
924 if (attrs & (1 << OVS_KEY_ATTR_VLAN)) {
925 __be16 tci;
926
927 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
928 if (!(tci & htons(VLAN_TAG_PRESENT))) {
929 if (is_mask)
05da5898 930 OVS_NLERR(log, "VLAN TCI mask does not have exact match for VLAN_TAG_PRESENT bit.");
e6445719 931 else
05da5898 932 OVS_NLERR(log, "VLAN TCI does not have VLAN_TAG_PRESENT bit set.");
e6445719
PS
933
934 return -EINVAL;
935 }
936
937 SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask);
938 attrs &= ~(1 << OVS_KEY_ATTR_VLAN);
a85311bf 939 }
e6445719
PS
940
941 if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) {
942 __be16 eth_type;
943
944 eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
945 if (is_mask) {
946 /* Always exact match EtherType. */
947 eth_type = htons(0xffff);
6713fc9b 948 } else if (!eth_proto_is_802_3(eth_type)) {
05da5898
JR
949 OVS_NLERR(log, "EtherType %x is less than min %x",
950 ntohs(eth_type), ETH_P_802_3_MIN);
e6445719
PS
951 return -EINVAL;
952 }
953
954 SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask);
955 attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
956 } else if (!is_mask) {
957 SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask);
958 }
959
960 if (attrs & (1 << OVS_KEY_ATTR_IPV4)) {
961 const struct ovs_key_ipv4 *ipv4_key;
962
963 ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]);
964 if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) {
05da5898
JR
965 OVS_NLERR(log, "IPv4 frag type %d is out of range max %d",
966 ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX);
e6445719
PS
967 return -EINVAL;
968 }
969 SW_FLOW_KEY_PUT(match, ip.proto,
970 ipv4_key->ipv4_proto, is_mask);
971 SW_FLOW_KEY_PUT(match, ip.tos,
972 ipv4_key->ipv4_tos, is_mask);
973 SW_FLOW_KEY_PUT(match, ip.ttl,
974 ipv4_key->ipv4_ttl, is_mask);
975 SW_FLOW_KEY_PUT(match, ip.frag,
976 ipv4_key->ipv4_frag, is_mask);
977 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
978 ipv4_key->ipv4_src, is_mask);
979 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
980 ipv4_key->ipv4_dst, is_mask);
981 attrs &= ~(1 << OVS_KEY_ATTR_IPV4);
982 }
983
984 if (attrs & (1 << OVS_KEY_ATTR_IPV6)) {
985 const struct ovs_key_ipv6 *ipv6_key;
986
987 ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]);
988 if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) {
05da5898
JR
989 OVS_NLERR(log, "IPv6 frag type %d is out of range max %d",
990 ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX);
e6445719
PS
991 return -EINVAL;
992 }
fecaef85 993
d3052bb5 994 if (!is_mask && ipv6_key->ipv6_label & htonl(0xFFF00000)) {
14591433 995 OVS_NLERR(log, "IPv6 flow label %x is out of range (max=%x).\n",
fecaef85
JR
996 ntohl(ipv6_key->ipv6_label), (1 << 20) - 1);
997 return -EINVAL;
998 }
999
e6445719
PS
1000 SW_FLOW_KEY_PUT(match, ipv6.label,
1001 ipv6_key->ipv6_label, is_mask);
1002 SW_FLOW_KEY_PUT(match, ip.proto,
1003 ipv6_key->ipv6_proto, is_mask);
1004 SW_FLOW_KEY_PUT(match, ip.tos,
1005 ipv6_key->ipv6_tclass, is_mask);
1006 SW_FLOW_KEY_PUT(match, ip.ttl,
1007 ipv6_key->ipv6_hlimit, is_mask);
1008 SW_FLOW_KEY_PUT(match, ip.frag,
1009 ipv6_key->ipv6_frag, is_mask);
1010 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src,
1011 ipv6_key->ipv6_src,
1012 sizeof(match->key->ipv6.addr.src),
1013 is_mask);
1014 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst,
1015 ipv6_key->ipv6_dst,
1016 sizeof(match->key->ipv6.addr.dst),
1017 is_mask);
1018
1019 attrs &= ~(1 << OVS_KEY_ATTR_IPV6);
1020 }
1021
1022 if (attrs & (1 << OVS_KEY_ATTR_ARP)) {
1023 const struct ovs_key_arp *arp_key;
1024
1025 arp_key = nla_data(a[OVS_KEY_ATTR_ARP]);
1026 if (!is_mask && (arp_key->arp_op & htons(0xff00))) {
05da5898 1027 OVS_NLERR(log, "Unknown ARP opcode (opcode=%d).",
e6445719
PS
1028 arp_key->arp_op);
1029 return -EINVAL;
1030 }
1031
1032 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
1033 arp_key->arp_sip, is_mask);
1034 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
1035 arp_key->arp_tip, is_mask);
1036 SW_FLOW_KEY_PUT(match, ip.proto,
1037 ntohs(arp_key->arp_op), is_mask);
1038 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha,
1039 arp_key->arp_sha, ETH_ALEN, is_mask);
1040 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha,
1041 arp_key->arp_tha, ETH_ALEN, is_mask);
1042
1043 attrs &= ~(1 << OVS_KEY_ATTR_ARP);
1044 }
1045
25cd9ba0
SH
1046 if (attrs & (1 << OVS_KEY_ATTR_MPLS)) {
1047 const struct ovs_key_mpls *mpls_key;
1048
1049 mpls_key = nla_data(a[OVS_KEY_ATTR_MPLS]);
1050 SW_FLOW_KEY_PUT(match, mpls.top_lse,
1051 mpls_key->mpls_lse, is_mask);
1052
1053 attrs &= ~(1 << OVS_KEY_ATTR_MPLS);
1054 }
1055
e6445719
PS
1056 if (attrs & (1 << OVS_KEY_ATTR_TCP)) {
1057 const struct ovs_key_tcp *tcp_key;
1058
1059 tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]);
1139e241
JR
1060 SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask);
1061 SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask);
e6445719
PS
1062 attrs &= ~(1 << OVS_KEY_ATTR_TCP);
1063 }
1064
5eb26b15 1065 if (attrs & (1 << OVS_KEY_ATTR_TCP_FLAGS)) {
1b760fb9
JS
1066 SW_FLOW_KEY_PUT(match, tp.flags,
1067 nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]),
1068 is_mask);
5eb26b15
JR
1069 attrs &= ~(1 << OVS_KEY_ATTR_TCP_FLAGS);
1070 }
1071
e6445719
PS
1072 if (attrs & (1 << OVS_KEY_ATTR_UDP)) {
1073 const struct ovs_key_udp *udp_key;
1074
1075 udp_key = nla_data(a[OVS_KEY_ATTR_UDP]);
1139e241
JR
1076 SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask);
1077 SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask);
e6445719
PS
1078 attrs &= ~(1 << OVS_KEY_ATTR_UDP);
1079 }
1080
1081 if (attrs & (1 << OVS_KEY_ATTR_SCTP)) {
1082 const struct ovs_key_sctp *sctp_key;
1083
1084 sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]);
1139e241
JR
1085 SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask);
1086 SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask);
e6445719
PS
1087 attrs &= ~(1 << OVS_KEY_ATTR_SCTP);
1088 }
1089
1090 if (attrs & (1 << OVS_KEY_ATTR_ICMP)) {
1091 const struct ovs_key_icmp *icmp_key;
1092
1093 icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]);
1139e241 1094 SW_FLOW_KEY_PUT(match, tp.src,
e6445719 1095 htons(icmp_key->icmp_type), is_mask);
1139e241 1096 SW_FLOW_KEY_PUT(match, tp.dst,
e6445719
PS
1097 htons(icmp_key->icmp_code), is_mask);
1098 attrs &= ~(1 << OVS_KEY_ATTR_ICMP);
1099 }
1100
1101 if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) {
1102 const struct ovs_key_icmpv6 *icmpv6_key;
1103
1104 icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]);
1139e241 1105 SW_FLOW_KEY_PUT(match, tp.src,
e6445719 1106 htons(icmpv6_key->icmpv6_type), is_mask);
1139e241 1107 SW_FLOW_KEY_PUT(match, tp.dst,
e6445719
PS
1108 htons(icmpv6_key->icmpv6_code), is_mask);
1109 attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6);
1110 }
1111
1112 if (attrs & (1 << OVS_KEY_ATTR_ND)) {
1113 const struct ovs_key_nd *nd_key;
1114
1115 nd_key = nla_data(a[OVS_KEY_ATTR_ND]);
1116 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target,
1117 nd_key->nd_target,
1118 sizeof(match->key->ipv6.nd.target),
1119 is_mask);
1120 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll,
1121 nd_key->nd_sll, ETH_ALEN, is_mask);
1122 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll,
1123 nd_key->nd_tll, ETH_ALEN, is_mask);
1124 attrs &= ~(1 << OVS_KEY_ATTR_ND);
1125 }
1126
426cda5c 1127 if (attrs != 0) {
05da5898 1128 OVS_NLERR(log, "Unknown key attributes %llx",
426cda5c 1129 (unsigned long long)attrs);
e6445719 1130 return -EINVAL;
426cda5c 1131 }
e6445719
PS
1132
1133 return 0;
1134}
1135
81bfe3c3
TG
1136static void nlattr_set(struct nlattr *attr, u8 val,
1137 const struct ovs_len_tbl *tbl)
e6445719 1138{
f47de068
PS
1139 struct nlattr *nla;
1140 int rem;
e6445719 1141
f47de068
PS
1142 /* The nlattr stream should already have been validated */
1143 nla_for_each_nested(nla, attr, rem) {
982b5270
JG
1144 if (tbl[nla_type(nla)].len == OVS_ATTR_NESTED) {
1145 if (tbl[nla_type(nla)].next)
1146 tbl = tbl[nla_type(nla)].next;
1147 nlattr_set(nla, val, tbl);
1148 } else {
f47de068 1149 memset(nla_data(nla), val, nla_len(nla));
982b5270 1150 }
9e384715
JS
1151
1152 if (nla_type(nla) == OVS_KEY_ATTR_CT_STATE)
1153 *(u32 *)nla_data(nla) &= CT_SUPPORTED_MASK;
f47de068
PS
1154 }
1155}
1156
1157static void mask_set_nlattr(struct nlattr *attr, u8 val)
1158{
81bfe3c3 1159 nlattr_set(attr, val, ovs_key_lens);
e6445719
PS
1160}
1161
1162/**
1163 * ovs_nla_get_match - parses Netlink attributes into a flow key and
1164 * mask. In case the 'mask' is NULL, the flow is treated as exact match
1165 * flow. Otherwise, it is treated as a wildcarded flow, except the mask
1166 * does not include any don't care bit.
c2ac6673 1167 * @net: Used to determine per-namespace field support.
e6445719
PS
1168 * @match: receives the extracted flow match information.
1169 * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
1170 * sequence. The fields should of the packet that triggered the creation
1171 * of this flow.
1172 * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink
1173 * attribute specifies the mask field of the wildcarded flow.
05da5898
JR
1174 * @log: Boolean to allow kernel error logging. Normally true, but when
1175 * probing for feature compatibility this should be passed in as false to
1176 * suppress unnecessary error logging.
e6445719 1177 */
c2ac6673 1178int ovs_nla_get_match(struct net *net, struct sw_flow_match *match,
a85311bf 1179 const struct nlattr *nla_key,
05da5898
JR
1180 const struct nlattr *nla_mask,
1181 bool log)
e6445719
PS
1182{
1183 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
1184 const struct nlattr *encap;
f47de068 1185 struct nlattr *newmask = NULL;
e6445719
PS
1186 u64 key_attrs = 0;
1187 u64 mask_attrs = 0;
1188 bool encap_valid = false;
1189 int err;
1190
05da5898 1191 err = parse_flow_nlattrs(nla_key, a, &key_attrs, log);
e6445719
PS
1192 if (err)
1193 return err;
1194
1195 if ((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) &&
1196 (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) &&
1197 (nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]) == htons(ETH_P_8021Q))) {
1198 __be16 tci;
1199
1200 if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) &&
1201 (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) {
05da5898 1202 OVS_NLERR(log, "Invalid Vlan frame.");
e6445719
PS
1203 return -EINVAL;
1204 }
1205
1206 key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
1207 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
1208 encap = a[OVS_KEY_ATTR_ENCAP];
1209 key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP);
1210 encap_valid = true;
1211
1212 if (tci & htons(VLAN_TAG_PRESENT)) {
05da5898 1213 err = parse_flow_nlattrs(encap, a, &key_attrs, log);
e6445719
PS
1214 if (err)
1215 return err;
1216 } else if (!tci) {
1217 /* Corner case for truncated 802.1Q header. */
1218 if (nla_len(encap)) {
05da5898 1219 OVS_NLERR(log, "Truncated 802.1Q header has non-zero encap attribute.");
e6445719
PS
1220 return -EINVAL;
1221 }
1222 } else {
05da5898 1223 OVS_NLERR(log, "Encap attr is set for non-VLAN frame");
e6445719
PS
1224 return -EINVAL;
1225 }
1226 }
1227
c2ac6673 1228 err = ovs_key_from_nlattrs(net, match, key_attrs, a, false, log);
e6445719
PS
1229 if (err)
1230 return err;
1231
a85311bf
PS
1232 if (match->mask) {
1233 if (!nla_mask) {
1234 /* Create an exact match mask. We need to set to 0xff
1235 * all the 'match->mask' fields that have been touched
1236 * in 'match->key'. We cannot simply memset
1237 * 'match->mask', because padding bytes and fields not
1238 * specified in 'match->key' should be left to 0.
1239 * Instead, we use a stream of netlink attributes,
1240 * copied from 'key' and set to 0xff.
1241 * ovs_key_from_nlattrs() will take care of filling
1242 * 'match->mask' appropriately.
1243 */
1244 newmask = kmemdup(nla_key,
1245 nla_total_size(nla_len(nla_key)),
1246 GFP_KERNEL);
1247 if (!newmask)
1248 return -ENOMEM;
f47de068 1249
a85311bf 1250 mask_set_nlattr(newmask, 0xff);
f47de068 1251
a85311bf
PS
1252 /* The userspace does not send tunnel attributes that
1253 * are 0, but we should not wildcard them nonetheless.
1254 */
00a93bab 1255 if (match->key->tun_proto)
a85311bf
PS
1256 SW_FLOW_KEY_MEMSET_FIELD(match, tun_key,
1257 0xff, true);
f47de068 1258
a85311bf
PS
1259 nla_mask = newmask;
1260 }
f47de068 1261
05da5898 1262 err = parse_flow_mask_nlattrs(nla_mask, a, &mask_attrs, log);
e6445719 1263 if (err)
f47de068 1264 goto free_newmask;
e6445719 1265
a85311bf
PS
1266 /* Always match on tci. */
1267 SW_FLOW_KEY_PUT(match, eth.tci, htons(0xffff), true);
1268
f47de068 1269 if (mask_attrs & 1 << OVS_KEY_ATTR_ENCAP) {
e6445719
PS
1270 __be16 eth_type = 0;
1271 __be16 tci = 0;
1272
1273 if (!encap_valid) {
05da5898 1274 OVS_NLERR(log, "Encap mask attribute is set for non-VLAN frame.");
f47de068
PS
1275 err = -EINVAL;
1276 goto free_newmask;
e6445719
PS
1277 }
1278
1279 mask_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP);
1280 if (a[OVS_KEY_ATTR_ETHERTYPE])
1281 eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
1282
1283 if (eth_type == htons(0xffff)) {
1284 mask_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
1285 encap = a[OVS_KEY_ATTR_ENCAP];
05da5898
JR
1286 err = parse_flow_mask_nlattrs(encap, a,
1287 &mask_attrs, log);
f47de068
PS
1288 if (err)
1289 goto free_newmask;
e6445719 1290 } else {
05da5898
JR
1291 OVS_NLERR(log, "VLAN frames must have an exact match on the TPID (mask=%x).",
1292 ntohs(eth_type));
f47de068
PS
1293 err = -EINVAL;
1294 goto free_newmask;
e6445719
PS
1295 }
1296
1297 if (a[OVS_KEY_ATTR_VLAN])
1298 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
1299
1300 if (!(tci & htons(VLAN_TAG_PRESENT))) {
05da5898
JR
1301 OVS_NLERR(log, "VLAN tag present bit must have an exact match (tci_mask=%x).",
1302 ntohs(tci));
f47de068
PS
1303 err = -EINVAL;
1304 goto free_newmask;
e6445719
PS
1305 }
1306 }
1307
c2ac6673
JS
1308 err = ovs_key_from_nlattrs(net, match, mask_attrs, a, true,
1309 log);
e6445719 1310 if (err)
f47de068 1311 goto free_newmask;
e6445719
PS
1312 }
1313
05da5898 1314 if (!match_validate(match, key_attrs, mask_attrs, log))
f47de068 1315 err = -EINVAL;
e6445719 1316
f47de068
PS
1317free_newmask:
1318 kfree(newmask);
1319 return err;
e6445719
PS
1320}
1321
74ed7ab9
JS
1322static size_t get_ufid_len(const struct nlattr *attr, bool log)
1323{
1324 size_t len;
1325
1326 if (!attr)
1327 return 0;
1328
1329 len = nla_len(attr);
1330 if (len < 1 || len > MAX_UFID_LENGTH) {
1331 OVS_NLERR(log, "ufid size %u bytes exceeds the range (1, %d)",
1332 nla_len(attr), MAX_UFID_LENGTH);
1333 return 0;
1334 }
1335
1336 return len;
1337}
1338
1339/* Initializes 'flow->ufid', returning true if 'attr' contains a valid UFID,
1340 * or false otherwise.
1341 */
1342bool ovs_nla_get_ufid(struct sw_flow_id *sfid, const struct nlattr *attr,
1343 bool log)
1344{
1345 sfid->ufid_len = get_ufid_len(attr, log);
1346 if (sfid->ufid_len)
1347 memcpy(sfid->ufid, nla_data(attr), sfid->ufid_len);
1348
1349 return sfid->ufid_len;
1350}
1351
1352int ovs_nla_get_identifier(struct sw_flow_id *sfid, const struct nlattr *ufid,
1353 const struct sw_flow_key *key, bool log)
1354{
1355 struct sw_flow_key *new_key;
1356
1357 if (ovs_nla_get_ufid(sfid, ufid, log))
1358 return 0;
1359
1360 /* If UFID was not provided, use unmasked key. */
1361 new_key = kmalloc(sizeof(*new_key), GFP_KERNEL);
1362 if (!new_key)
1363 return -ENOMEM;
1364 memcpy(new_key, key, sizeof(*key));
1365 sfid->unmasked_key = new_key;
1366
1367 return 0;
1368}
1369
1370u32 ovs_nla_get_ufid_flags(const struct nlattr *attr)
1371{
1372 return attr ? nla_get_u32(attr) : 0;
1373}
1374
e6445719
PS
1375/**
1376 * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key.
83c8df26 1377 * @key: Receives extracted in_port, priority, tun_key and skb_mark.
e6445719
PS
1378 * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
1379 * sequence.
05da5898
JR
1380 * @log: Boolean to allow kernel error logging. Normally true, but when
1381 * probing for feature compatibility this should be passed in as false to
1382 * suppress unnecessary error logging.
e6445719
PS
1383 *
1384 * This parses a series of Netlink attributes that form a flow key, which must
1385 * take the same form accepted by flow_from_nlattrs(), but only enough of it to
1386 * get the metadata, that is, the parts of the flow key that cannot be
1387 * extracted from the packet itself.
1388 */
1389
c2ac6673 1390int ovs_nla_get_flow_metadata(struct net *net, const struct nlattr *attr,
05da5898
JR
1391 struct sw_flow_key *key,
1392 bool log)
e6445719 1393{
e6445719 1394 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
83c8df26 1395 struct sw_flow_match match;
e6445719
PS
1396 u64 attrs = 0;
1397 int err;
e6445719 1398
05da5898 1399 err = parse_flow_nlattrs(attr, a, &attrs, log);
e6445719
PS
1400 if (err)
1401 return -EINVAL;
1402
1403 memset(&match, 0, sizeof(match));
83c8df26 1404 match.key = key;
e6445719 1405
7f8a436e 1406 memset(&key->ct, 0, sizeof(key->ct));
83c8df26 1407 key->phy.in_port = DP_MAX_PORTS;
e6445719 1408
c2ac6673 1409 return metadata_from_nlattrs(net, &match, &attrs, a, false, log);
e6445719
PS
1410}
1411
5b4237bb
JS
1412static int __ovs_nla_put_key(const struct sw_flow_key *swkey,
1413 const struct sw_flow_key *output, bool is_mask,
1414 struct sk_buff *skb)
e6445719
PS
1415{
1416 struct ovs_key_ethernet *eth_key;
1417 struct nlattr *nla, *encap;
e6445719 1418
971427f3
AZ
1419 if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id))
1420 goto nla_put_failure;
1421
1422 if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash))
1423 goto nla_put_failure;
1424
e6445719
PS
1425 if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority))
1426 goto nla_put_failure;
1427
00a93bab 1428 if ((swkey->tun_proto || is_mask)) {
d91641d9 1429 const void *opts = NULL;
f5796684
JG
1430
1431 if (output->tun_key.tun_flags & TUNNEL_OPTIONS_PRESENT)
d91641d9 1432 opts = TUN_METADATA_OPTS(output, swkey->tun_opts_len);
f5796684 1433
6b26ba3a
JB
1434 if (ip_tun_to_nlattr(skb, &output->tun_key, opts,
1435 swkey->tun_opts_len, swkey->tun_proto))
f5796684
JG
1436 goto nla_put_failure;
1437 }
e6445719
PS
1438
1439 if (swkey->phy.in_port == DP_MAX_PORTS) {
1440 if (is_mask && (output->phy.in_port == 0xffff))
1441 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff))
1442 goto nla_put_failure;
1443 } else {
1444 u16 upper_u16;
1445 upper_u16 = !is_mask ? 0 : 0xffff;
1446
1447 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT,
1448 (upper_u16 << 16) | output->phy.in_port))
1449 goto nla_put_failure;
1450 }
1451
1452 if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark))
1453 goto nla_put_failure;
1454
7f8a436e
JS
1455 if (ovs_ct_put_key(output, skb))
1456 goto nla_put_failure;
1457
e6445719
PS
1458 nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key));
1459 if (!nla)
1460 goto nla_put_failure;
1461
1462 eth_key = nla_data(nla);
8c63ff09
JP
1463 ether_addr_copy(eth_key->eth_src, output->eth.src);
1464 ether_addr_copy(eth_key->eth_dst, output->eth.dst);
e6445719
PS
1465
1466 if (swkey->eth.tci || swkey->eth.type == htons(ETH_P_8021Q)) {
1467 __be16 eth_type;
1468 eth_type = !is_mask ? htons(ETH_P_8021Q) : htons(0xffff);
1469 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) ||
1470 nla_put_be16(skb, OVS_KEY_ATTR_VLAN, output->eth.tci))
1471 goto nla_put_failure;
1472 encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
1473 if (!swkey->eth.tci)
1474 goto unencap;
1475 } else
1476 encap = NULL;
1477
1478 if (swkey->eth.type == htons(ETH_P_802_2)) {
1479 /*
1480 * Ethertype 802.2 is represented in the netlink with omitted
1481 * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and
1482 * 0xffff in the mask attribute. Ethertype can also
1483 * be wildcarded.
1484 */
1485 if (is_mask && output->eth.type)
1486 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE,
1487 output->eth.type))
1488 goto nla_put_failure;
1489 goto unencap;
1490 }
1491
1492 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type))
1493 goto nla_put_failure;
1494
1495 if (swkey->eth.type == htons(ETH_P_IP)) {
1496 struct ovs_key_ipv4 *ipv4_key;
1497
1498 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key));
1499 if (!nla)
1500 goto nla_put_failure;
1501 ipv4_key = nla_data(nla);
1502 ipv4_key->ipv4_src = output->ipv4.addr.src;
1503 ipv4_key->ipv4_dst = output->ipv4.addr.dst;
1504 ipv4_key->ipv4_proto = output->ip.proto;
1505 ipv4_key->ipv4_tos = output->ip.tos;
1506 ipv4_key->ipv4_ttl = output->ip.ttl;
1507 ipv4_key->ipv4_frag = output->ip.frag;
1508 } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
1509 struct ovs_key_ipv6 *ipv6_key;
1510
1511 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key));
1512 if (!nla)
1513 goto nla_put_failure;
1514 ipv6_key = nla_data(nla);
1515 memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src,
1516 sizeof(ipv6_key->ipv6_src));
1517 memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst,
1518 sizeof(ipv6_key->ipv6_dst));
1519 ipv6_key->ipv6_label = output->ipv6.label;
1520 ipv6_key->ipv6_proto = output->ip.proto;
1521 ipv6_key->ipv6_tclass = output->ip.tos;
1522 ipv6_key->ipv6_hlimit = output->ip.ttl;
1523 ipv6_key->ipv6_frag = output->ip.frag;
1524 } else if (swkey->eth.type == htons(ETH_P_ARP) ||
1525 swkey->eth.type == htons(ETH_P_RARP)) {
1526 struct ovs_key_arp *arp_key;
1527
1528 nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key));
1529 if (!nla)
1530 goto nla_put_failure;
1531 arp_key = nla_data(nla);
1532 memset(arp_key, 0, sizeof(struct ovs_key_arp));
1533 arp_key->arp_sip = output->ipv4.addr.src;
1534 arp_key->arp_tip = output->ipv4.addr.dst;
1535 arp_key->arp_op = htons(output->ip.proto);
8c63ff09
JP
1536 ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha);
1537 ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha);
25cd9ba0
SH
1538 } else if (eth_p_mpls(swkey->eth.type)) {
1539 struct ovs_key_mpls *mpls_key;
1540
1541 nla = nla_reserve(skb, OVS_KEY_ATTR_MPLS, sizeof(*mpls_key));
1542 if (!nla)
1543 goto nla_put_failure;
1544 mpls_key = nla_data(nla);
1545 mpls_key->mpls_lse = output->mpls.top_lse;
e6445719
PS
1546 }
1547
1548 if ((swkey->eth.type == htons(ETH_P_IP) ||
1549 swkey->eth.type == htons(ETH_P_IPV6)) &&
1550 swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
1551
1552 if (swkey->ip.proto == IPPROTO_TCP) {
1553 struct ovs_key_tcp *tcp_key;
1554
1555 nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key));
1556 if (!nla)
1557 goto nla_put_failure;
1558 tcp_key = nla_data(nla);
1139e241
JR
1559 tcp_key->tcp_src = output->tp.src;
1560 tcp_key->tcp_dst = output->tp.dst;
1561 if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS,
1562 output->tp.flags))
1563 goto nla_put_failure;
e6445719
PS
1564 } else if (swkey->ip.proto == IPPROTO_UDP) {
1565 struct ovs_key_udp *udp_key;
1566
1567 nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key));
1568 if (!nla)
1569 goto nla_put_failure;
1570 udp_key = nla_data(nla);
1139e241
JR
1571 udp_key->udp_src = output->tp.src;
1572 udp_key->udp_dst = output->tp.dst;
e6445719
PS
1573 } else if (swkey->ip.proto == IPPROTO_SCTP) {
1574 struct ovs_key_sctp *sctp_key;
1575
1576 nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key));
1577 if (!nla)
1578 goto nla_put_failure;
1579 sctp_key = nla_data(nla);
1139e241
JR
1580 sctp_key->sctp_src = output->tp.src;
1581 sctp_key->sctp_dst = output->tp.dst;
e6445719
PS
1582 } else if (swkey->eth.type == htons(ETH_P_IP) &&
1583 swkey->ip.proto == IPPROTO_ICMP) {
1584 struct ovs_key_icmp *icmp_key;
1585
1586 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key));
1587 if (!nla)
1588 goto nla_put_failure;
1589 icmp_key = nla_data(nla);
1139e241
JR
1590 icmp_key->icmp_type = ntohs(output->tp.src);
1591 icmp_key->icmp_code = ntohs(output->tp.dst);
e6445719
PS
1592 } else if (swkey->eth.type == htons(ETH_P_IPV6) &&
1593 swkey->ip.proto == IPPROTO_ICMPV6) {
1594 struct ovs_key_icmpv6 *icmpv6_key;
1595
1596 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6,
1597 sizeof(*icmpv6_key));
1598 if (!nla)
1599 goto nla_put_failure;
1600 icmpv6_key = nla_data(nla);
1139e241
JR
1601 icmpv6_key->icmpv6_type = ntohs(output->tp.src);
1602 icmpv6_key->icmpv6_code = ntohs(output->tp.dst);
e6445719
PS
1603
1604 if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION ||
1605 icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) {
1606 struct ovs_key_nd *nd_key;
1607
1608 nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key));
1609 if (!nla)
1610 goto nla_put_failure;
1611 nd_key = nla_data(nla);
1612 memcpy(nd_key->nd_target, &output->ipv6.nd.target,
1613 sizeof(nd_key->nd_target));
8c63ff09
JP
1614 ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll);
1615 ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll);
e6445719
PS
1616 }
1617 }
1618 }
1619
1620unencap:
1621 if (encap)
1622 nla_nest_end(skb, encap);
1623
1624 return 0;
1625
1626nla_put_failure:
1627 return -EMSGSIZE;
1628}
1629
5b4237bb
JS
1630int ovs_nla_put_key(const struct sw_flow_key *swkey,
1631 const struct sw_flow_key *output, int attr, bool is_mask,
1632 struct sk_buff *skb)
1633{
1634 int err;
1635 struct nlattr *nla;
1636
1637 nla = nla_nest_start(skb, attr);
1638 if (!nla)
1639 return -EMSGSIZE;
1640 err = __ovs_nla_put_key(swkey, output, is_mask, skb);
1641 if (err)
1642 return err;
1643 nla_nest_end(skb, nla);
1644
1645 return 0;
1646}
1647
1648/* Called with ovs_mutex or RCU read lock. */
74ed7ab9
JS
1649int ovs_nla_put_identifier(const struct sw_flow *flow, struct sk_buff *skb)
1650{
1651 if (ovs_identifier_is_ufid(&flow->id))
1652 return nla_put(skb, OVS_FLOW_ATTR_UFID, flow->id.ufid_len,
1653 flow->id.ufid);
1654
1655 return ovs_nla_put_key(flow->id.unmasked_key, flow->id.unmasked_key,
1656 OVS_FLOW_ATTR_KEY, false, skb);
1657}
1658
1659/* Called with ovs_mutex or RCU read lock. */
1660int ovs_nla_put_masked_key(const struct sw_flow *flow, struct sk_buff *skb)
5b4237bb 1661{
26ad0b83 1662 return ovs_nla_put_key(&flow->key, &flow->key,
5b4237bb
JS
1663 OVS_FLOW_ATTR_KEY, false, skb);
1664}
1665
1666/* Called with ovs_mutex or RCU read lock. */
1667int ovs_nla_put_mask(const struct sw_flow *flow, struct sk_buff *skb)
1668{
1669 return ovs_nla_put_key(&flow->key, &flow->mask->key,
1670 OVS_FLOW_ATTR_MASK, true, skb);
1671}
1672
e6445719
PS
1673#define MAX_ACTIONS_BUFSIZE (32 * 1024)
1674
05da5898 1675static struct sw_flow_actions *nla_alloc_flow_actions(int size, bool log)
e6445719
PS
1676{
1677 struct sw_flow_actions *sfa;
1678
426cda5c 1679 if (size > MAX_ACTIONS_BUFSIZE) {
05da5898 1680 OVS_NLERR(log, "Flow action size %u bytes exceeds max", size);
e6445719 1681 return ERR_PTR(-EINVAL);
426cda5c 1682 }
e6445719
PS
1683
1684 sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL);
1685 if (!sfa)
1686 return ERR_PTR(-ENOMEM);
1687
1688 sfa->actions_len = 0;
1689 return sfa;
1690}
1691
34ae932a
TG
1692static void ovs_nla_free_set_action(const struct nlattr *a)
1693{
1694 const struct nlattr *ovs_key = nla_data(a);
1695 struct ovs_tunnel_info *ovs_tun;
1696
1697 switch (nla_type(ovs_key)) {
1698 case OVS_KEY_ATTR_TUNNEL_INFO:
1699 ovs_tun = nla_data(ovs_key);
1700 dst_release((struct dst_entry *)ovs_tun->tun_dst);
1701 break;
1702 }
1703}
1704
1705void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts)
1706{
1707 const struct nlattr *a;
1708 int rem;
1709
1710 if (!sf_acts)
1711 return;
1712
1713 nla_for_each_attr(a, sf_acts->actions, sf_acts->actions_len, rem) {
1714 switch (nla_type(a)) {
1715 case OVS_ACTION_ATTR_SET:
1716 ovs_nla_free_set_action(a);
1717 break;
7f8a436e
JS
1718 case OVS_ACTION_ATTR_CT:
1719 ovs_ct_free_action(a);
1720 break;
34ae932a
TG
1721 }
1722 }
1723
1724 kfree(sf_acts);
1725}
1726
1727static void __ovs_nla_free_flow_actions(struct rcu_head *head)
1728{
1729 ovs_nla_free_flow_actions(container_of(head, struct sw_flow_actions, rcu));
1730}
1731
e6445719
PS
1732/* Schedules 'sf_acts' to be freed after the next RCU grace period.
1733 * The caller must hold rcu_read_lock for this to be sensible. */
34ae932a 1734void ovs_nla_free_flow_actions_rcu(struct sw_flow_actions *sf_acts)
e6445719 1735{
34ae932a 1736 call_rcu(&sf_acts->rcu, __ovs_nla_free_flow_actions);
e6445719
PS
1737}
1738
1739static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa,
05da5898 1740 int attr_len, bool log)
e6445719
PS
1741{
1742
1743 struct sw_flow_actions *acts;
1744 int new_acts_size;
1745 int req_size = NLA_ALIGN(attr_len);
1746 int next_offset = offsetof(struct sw_flow_actions, actions) +
1747 (*sfa)->actions_len;
1748
1749 if (req_size <= (ksize(*sfa) - next_offset))
1750 goto out;
1751
1752 new_acts_size = ksize(*sfa) * 2;
1753
1754 if (new_acts_size > MAX_ACTIONS_BUFSIZE) {
1755 if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size)
1756 return ERR_PTR(-EMSGSIZE);
1757 new_acts_size = MAX_ACTIONS_BUFSIZE;
1758 }
1759
05da5898 1760 acts = nla_alloc_flow_actions(new_acts_size, log);
e6445719
PS
1761 if (IS_ERR(acts))
1762 return (void *)acts;
1763
1764 memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len);
1765 acts->actions_len = (*sfa)->actions_len;
8e2fed1c 1766 acts->orig_len = (*sfa)->orig_len;
e6445719
PS
1767 kfree(*sfa);
1768 *sfa = acts;
1769
1770out:
1771 (*sfa)->actions_len += req_size;
1772 return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset);
1773}
1774
f0b128c1 1775static struct nlattr *__add_action(struct sw_flow_actions **sfa,
05da5898 1776 int attrtype, void *data, int len, bool log)
e6445719
PS
1777{
1778 struct nlattr *a;
1779
05da5898 1780 a = reserve_sfa_size(sfa, nla_attr_size(len), log);
e6445719 1781 if (IS_ERR(a))
f0b128c1 1782 return a;
e6445719
PS
1783
1784 a->nla_type = attrtype;
1785 a->nla_len = nla_attr_size(len);
1786
1787 if (data)
1788 memcpy(nla_data(a), data, len);
1789 memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len));
1790
f0b128c1
JG
1791 return a;
1792}
1793
7f8a436e
JS
1794int ovs_nla_add_action(struct sw_flow_actions **sfa, int attrtype, void *data,
1795 int len, bool log)
f0b128c1
JG
1796{
1797 struct nlattr *a;
1798
05da5898 1799 a = __add_action(sfa, attrtype, data, len, log);
f0b128c1 1800
f35423c1 1801 return PTR_ERR_OR_ZERO(a);
e6445719
PS
1802}
1803
1804static inline int add_nested_action_start(struct sw_flow_actions **sfa,
05da5898 1805 int attrtype, bool log)
e6445719
PS
1806{
1807 int used = (*sfa)->actions_len;
1808 int err;
1809
7f8a436e 1810 err = ovs_nla_add_action(sfa, attrtype, NULL, 0, log);
e6445719
PS
1811 if (err)
1812 return err;
1813
1814 return used;
1815}
1816
1817static inline void add_nested_action_end(struct sw_flow_actions *sfa,
1818 int st_offset)
1819{
1820 struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions +
1821 st_offset);
1822
1823 a->nla_len = sfa->actions_len - st_offset;
1824}
1825
7f8a436e 1826static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
25cd9ba0
SH
1827 const struct sw_flow_key *key,
1828 int depth, struct sw_flow_actions **sfa,
05da5898 1829 __be16 eth_type, __be16 vlan_tci, bool log);
25cd9ba0 1830
7f8a436e 1831static int validate_and_copy_sample(struct net *net, const struct nlattr *attr,
e6445719 1832 const struct sw_flow_key *key, int depth,
25cd9ba0 1833 struct sw_flow_actions **sfa,
05da5898 1834 __be16 eth_type, __be16 vlan_tci, bool log)
e6445719
PS
1835{
1836 const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];
1837 const struct nlattr *probability, *actions;
1838 const struct nlattr *a;
1839 int rem, start, err, st_acts;
1840
1841 memset(attrs, 0, sizeof(attrs));
1842 nla_for_each_nested(a, attr, rem) {
1843 int type = nla_type(a);
1844 if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type])
1845 return -EINVAL;
1846 attrs[type] = a;
1847 }
1848 if (rem)
1849 return -EINVAL;
1850
1851 probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY];
1852 if (!probability || nla_len(probability) != sizeof(u32))
1853 return -EINVAL;
1854
1855 actions = attrs[OVS_SAMPLE_ATTR_ACTIONS];
1856 if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN))
1857 return -EINVAL;
1858
1859 /* validation done, copy sample action. */
05da5898 1860 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE, log);
e6445719
PS
1861 if (start < 0)
1862 return start;
7f8a436e
JS
1863 err = ovs_nla_add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY,
1864 nla_data(probability), sizeof(u32), log);
e6445719
PS
1865 if (err)
1866 return err;
05da5898 1867 st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS, log);
e6445719
PS
1868 if (st_acts < 0)
1869 return st_acts;
1870
7f8a436e 1871 err = __ovs_nla_copy_actions(net, actions, key, depth + 1, sfa,
05da5898 1872 eth_type, vlan_tci, log);
e6445719
PS
1873 if (err)
1874 return err;
1875
1876 add_nested_action_end(*sfa, st_acts);
1877 add_nested_action_end(*sfa, start);
1878
1879 return 0;
1880}
1881
e6445719
PS
1882void ovs_match_init(struct sw_flow_match *match,
1883 struct sw_flow_key *key,
1884 struct sw_flow_mask *mask)
1885{
1886 memset(match, 0, sizeof(*match));
1887 match->key = key;
1888 match->mask = mask;
1889
1890 memset(key, 0, sizeof(*key));
1891
1892 if (mask) {
1893 memset(&mask->key, 0, sizeof(mask->key));
1894 mask->range.start = mask->range.end = 0;
1895 }
1896}
1897
d91641d9
TG
1898static int validate_geneve_opts(struct sw_flow_key *key)
1899{
1900 struct geneve_opt *option;
1901 int opts_len = key->tun_opts_len;
1902 bool crit_opt = false;
1903
1904 option = (struct geneve_opt *)TUN_METADATA_OPTS(key, key->tun_opts_len);
1905 while (opts_len > 0) {
1906 int len;
1907
1908 if (opts_len < sizeof(*option))
1909 return -EINVAL;
1910
1911 len = sizeof(*option) + option->length * 4;
1912 if (len > opts_len)
1913 return -EINVAL;
1914
1915 crit_opt |= !!(option->type & GENEVE_CRIT_OPT_TYPE);
1916
1917 option = (struct geneve_opt *)((u8 *)option + len);
1918 opts_len -= len;
1919 };
1920
1921 key->tun_key.tun_flags |= crit_opt ? TUNNEL_CRIT_OPT : 0;
1922
1923 return 0;
1924}
1925
e6445719 1926static int validate_and_copy_set_tun(const struct nlattr *attr,
05da5898 1927 struct sw_flow_actions **sfa, bool log)
e6445719
PS
1928{
1929 struct sw_flow_match match;
1930 struct sw_flow_key key;
34ae932a 1931 struct metadata_dst *tun_dst;
1d8fff90 1932 struct ip_tunnel_info *tun_info;
34ae932a 1933 struct ovs_tunnel_info *ovs_tun;
f0b128c1 1934 struct nlattr *a;
13101602 1935 int err = 0, start, opts_type;
e6445719
PS
1936
1937 ovs_match_init(&match, &key, NULL);
6b26ba3a 1938 opts_type = ip_tun_from_nlattr(nla_data(attr), &match, false, log);
1dd144cf
TG
1939 if (opts_type < 0)
1940 return opts_type;
e6445719 1941
f5796684 1942 if (key.tun_opts_len) {
1dd144cf
TG
1943 switch (opts_type) {
1944 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
1945 err = validate_geneve_opts(&key);
1946 if (err < 0)
1947 return err;
1948 break;
1949 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
1950 break;
1951 }
f5796684
JG
1952 };
1953
05da5898 1954 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET, log);
e6445719
PS
1955 if (start < 0)
1956 return start;
1957
34ae932a
TG
1958 tun_dst = metadata_dst_alloc(key.tun_opts_len, GFP_KERNEL);
1959 if (!tun_dst)
1960 return -ENOMEM;
1961
f0b128c1 1962 a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL,
34ae932a
TG
1963 sizeof(*ovs_tun), log);
1964 if (IS_ERR(a)) {
1965 dst_release((struct dst_entry *)tun_dst);
f0b128c1 1966 return PTR_ERR(a);
34ae932a
TG
1967 }
1968
1969 ovs_tun = nla_data(a);
1970 ovs_tun->tun_dst = tun_dst;
f0b128c1 1971
34ae932a
TG
1972 tun_info = &tun_dst->u.tun_info;
1973 tun_info->mode = IP_TUNNEL_INFO_TX;
00a93bab
JB
1974 if (key.tun_proto == AF_INET6)
1975 tun_info->mode |= IP_TUNNEL_INFO_IPV6;
1d8fff90 1976 tun_info->key = key.tun_key;
f0b128c1 1977
4c222798
PS
1978 /* We need to store the options in the action itself since
1979 * everything else will go away after flow setup. We can append
1980 * it to tun_info and then point there.
1981 */
1982 ip_tunnel_info_opts_set(tun_info,
1983 TUN_METADATA_OPTS(&key, key.tun_opts_len),
1984 key.tun_opts_len);
e6445719
PS
1985 add_nested_action_end(*sfa, start);
1986
1987 return err;
1988}
1989
83d2b9ba
JR
1990/* Return false if there are any non-masked bits set.
1991 * Mask follows data immediately, before any netlink padding.
1992 */
1993static bool validate_masked(u8 *data, int len)
1994{
1995 u8 *mask = data + len;
1996
1997 while (len--)
1998 if (*data++ & ~*mask++)
1999 return false;
2000
2001 return true;
2002}
2003
e6445719
PS
2004static int validate_set(const struct nlattr *a,
2005 const struct sw_flow_key *flow_key,
2006 struct sw_flow_actions **sfa,
83d2b9ba 2007 bool *skip_copy, __be16 eth_type, bool masked, bool log)
e6445719
PS
2008{
2009 const struct nlattr *ovs_key = nla_data(a);
2010 int key_type = nla_type(ovs_key);
83d2b9ba 2011 size_t key_len;
e6445719
PS
2012
2013 /* There can be only one key in a action */
2014 if (nla_total_size(nla_len(ovs_key)) != nla_len(a))
2015 return -EINVAL;
2016
83d2b9ba
JR
2017 key_len = nla_len(ovs_key);
2018 if (masked)
2019 key_len /= 2;
2020
e6445719 2021 if (key_type > OVS_KEY_ATTR_MAX ||
982b5270 2022 !check_attr_len(key_len, ovs_key_lens[key_type].len))
e6445719
PS
2023 return -EINVAL;
2024
83d2b9ba
JR
2025 if (masked && !validate_masked(nla_data(ovs_key), key_len))
2026 return -EINVAL;
2027
e6445719
PS
2028 switch (key_type) {
2029 const struct ovs_key_ipv4 *ipv4_key;
2030 const struct ovs_key_ipv6 *ipv6_key;
2031 int err;
2032
2033 case OVS_KEY_ATTR_PRIORITY:
2034 case OVS_KEY_ATTR_SKB_MARK:
182e3042 2035 case OVS_KEY_ATTR_CT_MARK:
33db4125 2036 case OVS_KEY_ATTR_CT_LABELS:
e6445719
PS
2037 case OVS_KEY_ATTR_ETHERNET:
2038 break;
2039
2040 case OVS_KEY_ATTR_TUNNEL:
25cd9ba0
SH
2041 if (eth_p_mpls(eth_type))
2042 return -EINVAL;
2043
83d2b9ba
JR
2044 if (masked)
2045 return -EINVAL; /* Masked tunnel set not supported. */
2046
2047 *skip_copy = true;
05da5898 2048 err = validate_and_copy_set_tun(a, sfa, log);
e6445719
PS
2049 if (err)
2050 return err;
2051 break;
2052
2053 case OVS_KEY_ATTR_IPV4:
25cd9ba0 2054 if (eth_type != htons(ETH_P_IP))
e6445719
PS
2055 return -EINVAL;
2056
e6445719 2057 ipv4_key = nla_data(ovs_key);
e6445719 2058
83d2b9ba
JR
2059 if (masked) {
2060 const struct ovs_key_ipv4 *mask = ipv4_key + 1;
e6445719 2061
83d2b9ba
JR
2062 /* Non-writeable fields. */
2063 if (mask->ipv4_proto || mask->ipv4_frag)
2064 return -EINVAL;
2065 } else {
2066 if (ipv4_key->ipv4_proto != flow_key->ip.proto)
2067 return -EINVAL;
2068
2069 if (ipv4_key->ipv4_frag != flow_key->ip.frag)
2070 return -EINVAL;
2071 }
e6445719
PS
2072 break;
2073
2074 case OVS_KEY_ATTR_IPV6:
25cd9ba0 2075 if (eth_type != htons(ETH_P_IPV6))
e6445719
PS
2076 return -EINVAL;
2077
e6445719 2078 ipv6_key = nla_data(ovs_key);
e6445719 2079
83d2b9ba
JR
2080 if (masked) {
2081 const struct ovs_key_ipv6 *mask = ipv6_key + 1;
2082
2083 /* Non-writeable fields. */
2084 if (mask->ipv6_proto || mask->ipv6_frag)
2085 return -EINVAL;
2086
2087 /* Invalid bits in the flow label mask? */
2088 if (ntohl(mask->ipv6_label) & 0xFFF00000)
2089 return -EINVAL;
2090 } else {
2091 if (ipv6_key->ipv6_proto != flow_key->ip.proto)
2092 return -EINVAL;
e6445719 2093
83d2b9ba
JR
2094 if (ipv6_key->ipv6_frag != flow_key->ip.frag)
2095 return -EINVAL;
2096 }
e6445719
PS
2097 if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000)
2098 return -EINVAL;
2099
2100 break;
2101
2102 case OVS_KEY_ATTR_TCP:
83d2b9ba
JR
2103 if ((eth_type != htons(ETH_P_IP) &&
2104 eth_type != htons(ETH_P_IPV6)) ||
2105 flow_key->ip.proto != IPPROTO_TCP)
e6445719
PS
2106 return -EINVAL;
2107
83d2b9ba 2108 break;
e6445719
PS
2109
2110 case OVS_KEY_ATTR_UDP:
83d2b9ba
JR
2111 if ((eth_type != htons(ETH_P_IP) &&
2112 eth_type != htons(ETH_P_IPV6)) ||
2113 flow_key->ip.proto != IPPROTO_UDP)
e6445719
PS
2114 return -EINVAL;
2115
83d2b9ba 2116 break;
25cd9ba0
SH
2117
2118 case OVS_KEY_ATTR_MPLS:
2119 if (!eth_p_mpls(eth_type))
2120 return -EINVAL;
2121 break;
e6445719
PS
2122
2123 case OVS_KEY_ATTR_SCTP:
83d2b9ba
JR
2124 if ((eth_type != htons(ETH_P_IP) &&
2125 eth_type != htons(ETH_P_IPV6)) ||
2126 flow_key->ip.proto != IPPROTO_SCTP)
e6445719
PS
2127 return -EINVAL;
2128
83d2b9ba 2129 break;
e6445719
PS
2130
2131 default:
2132 return -EINVAL;
2133 }
2134
83d2b9ba
JR
2135 /* Convert non-masked non-tunnel set actions to masked set actions. */
2136 if (!masked && key_type != OVS_KEY_ATTR_TUNNEL) {
2137 int start, len = key_len * 2;
2138 struct nlattr *at;
2139
2140 *skip_copy = true;
2141
2142 start = add_nested_action_start(sfa,
2143 OVS_ACTION_ATTR_SET_TO_MASKED,
2144 log);
2145 if (start < 0)
2146 return start;
2147
2148 at = __add_action(sfa, key_type, NULL, len, log);
2149 if (IS_ERR(at))
2150 return PTR_ERR(at);
2151
2152 memcpy(nla_data(at), nla_data(ovs_key), key_len); /* Key. */
2153 memset(nla_data(at) + key_len, 0xff, key_len); /* Mask. */
2154 /* Clear non-writeable bits from otherwise writeable fields. */
2155 if (key_type == OVS_KEY_ATTR_IPV6) {
2156 struct ovs_key_ipv6 *mask = nla_data(at) + key_len;
2157
2158 mask->ipv6_label &= htonl(0x000FFFFF);
2159 }
2160 add_nested_action_end(*sfa, start);
2161 }
2162
e6445719
PS
2163 return 0;
2164}
2165
2166static int validate_userspace(const struct nlattr *attr)
2167{
2168 static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = {
2169 [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 },
2170 [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC },
8f0aad6f 2171 [OVS_USERSPACE_ATTR_EGRESS_TUN_PORT] = {.type = NLA_U32 },
e6445719
PS
2172 };
2173 struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];
2174 int error;
2175
2176 error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX,
2177 attr, userspace_policy);
2178 if (error)
2179 return error;
2180
2181 if (!a[OVS_USERSPACE_ATTR_PID] ||
2182 !nla_get_u32(a[OVS_USERSPACE_ATTR_PID]))
2183 return -EINVAL;
2184
2185 return 0;
2186}
2187
2188static int copy_action(const struct nlattr *from,
05da5898 2189 struct sw_flow_actions **sfa, bool log)
e6445719
PS
2190{
2191 int totlen = NLA_ALIGN(from->nla_len);
2192 struct nlattr *to;
2193
05da5898 2194 to = reserve_sfa_size(sfa, from->nla_len, log);
e6445719
PS
2195 if (IS_ERR(to))
2196 return PTR_ERR(to);
2197
2198 memcpy(to, from, totlen);
2199 return 0;
2200}
2201
7f8a436e 2202static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
25cd9ba0
SH
2203 const struct sw_flow_key *key,
2204 int depth, struct sw_flow_actions **sfa,
05da5898 2205 __be16 eth_type, __be16 vlan_tci, bool log)
e6445719
PS
2206{
2207 const struct nlattr *a;
2208 int rem, err;
2209
2210 if (depth >= SAMPLE_ACTION_DEPTH)
2211 return -EOVERFLOW;
2212
2213 nla_for_each_nested(a, attr, rem) {
2214 /* Expected argument lengths, (u32)-1 for variable length. */
2215 static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {
2216 [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32),
971427f3 2217 [OVS_ACTION_ATTR_RECIRC] = sizeof(u32),
e6445719 2218 [OVS_ACTION_ATTR_USERSPACE] = (u32)-1,
25cd9ba0
SH
2219 [OVS_ACTION_ATTR_PUSH_MPLS] = sizeof(struct ovs_action_push_mpls),
2220 [OVS_ACTION_ATTR_POP_MPLS] = sizeof(__be16),
e6445719
PS
2221 [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan),
2222 [OVS_ACTION_ATTR_POP_VLAN] = 0,
2223 [OVS_ACTION_ATTR_SET] = (u32)-1,
83d2b9ba 2224 [OVS_ACTION_ATTR_SET_MASKED] = (u32)-1,
971427f3 2225 [OVS_ACTION_ATTR_SAMPLE] = (u32)-1,
7f8a436e
JS
2226 [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash),
2227 [OVS_ACTION_ATTR_CT] = (u32)-1,
e6445719
PS
2228 };
2229 const struct ovs_action_push_vlan *vlan;
2230 int type = nla_type(a);
2231 bool skip_copy;
2232
2233 if (type > OVS_ACTION_ATTR_MAX ||
2234 (action_lens[type] != nla_len(a) &&
2235 action_lens[type] != (u32)-1))
2236 return -EINVAL;
2237
2238 skip_copy = false;
2239 switch (type) {
2240 case OVS_ACTION_ATTR_UNSPEC:
2241 return -EINVAL;
2242
2243 case OVS_ACTION_ATTR_USERSPACE:
2244 err = validate_userspace(a);
2245 if (err)
2246 return err;
2247 break;
2248
2249 case OVS_ACTION_ATTR_OUTPUT:
2250 if (nla_get_u32(a) >= DP_MAX_PORTS)
2251 return -EINVAL;
2252 break;
2253
971427f3
AZ
2254 case OVS_ACTION_ATTR_HASH: {
2255 const struct ovs_action_hash *act_hash = nla_data(a);
2256
2257 switch (act_hash->hash_alg) {
2258 case OVS_HASH_ALG_L4:
2259 break;
2260 default:
2261 return -EINVAL;
2262 }
2263
2264 break;
2265 }
e6445719
PS
2266
2267 case OVS_ACTION_ATTR_POP_VLAN:
25cd9ba0 2268 vlan_tci = htons(0);
e6445719
PS
2269 break;
2270
2271 case OVS_ACTION_ATTR_PUSH_VLAN:
2272 vlan = nla_data(a);
2273 if (vlan->vlan_tpid != htons(ETH_P_8021Q))
2274 return -EINVAL;
2275 if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT)))
2276 return -EINVAL;
25cd9ba0 2277 vlan_tci = vlan->vlan_tci;
e6445719
PS
2278 break;
2279
971427f3
AZ
2280 case OVS_ACTION_ATTR_RECIRC:
2281 break;
2282
25cd9ba0
SH
2283 case OVS_ACTION_ATTR_PUSH_MPLS: {
2284 const struct ovs_action_push_mpls *mpls = nla_data(a);
2285
25cd9ba0
SH
2286 if (!eth_p_mpls(mpls->mpls_ethertype))
2287 return -EINVAL;
2288 /* Prohibit push MPLS other than to a white list
2289 * for packets that have a known tag order.
2290 */
2291 if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
2292 (eth_type != htons(ETH_P_IP) &&
2293 eth_type != htons(ETH_P_IPV6) &&
2294 eth_type != htons(ETH_P_ARP) &&
2295 eth_type != htons(ETH_P_RARP) &&
2296 !eth_p_mpls(eth_type)))
2297 return -EINVAL;
2298 eth_type = mpls->mpls_ethertype;
2299 break;
2300 }
2301
2302 case OVS_ACTION_ATTR_POP_MPLS:
2303 if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
2304 !eth_p_mpls(eth_type))
2305 return -EINVAL;
2306
2307 /* Disallow subsequent L2.5+ set and mpls_pop actions
2308 * as there is no check here to ensure that the new
2309 * eth_type is valid and thus set actions could
2310 * write off the end of the packet or otherwise
2311 * corrupt it.
2312 *
2313 * Support for these actions is planned using packet
2314 * recirculation.
2315 */
2316 eth_type = htons(0);
2317 break;
2318
e6445719 2319 case OVS_ACTION_ATTR_SET:
25cd9ba0 2320 err = validate_set(a, key, sfa,
83d2b9ba
JR
2321 &skip_copy, eth_type, false, log);
2322 if (err)
2323 return err;
2324 break;
2325
2326 case OVS_ACTION_ATTR_SET_MASKED:
2327 err = validate_set(a, key, sfa,
2328 &skip_copy, eth_type, true, log);
e6445719
PS
2329 if (err)
2330 return err;
2331 break;
2332
2333 case OVS_ACTION_ATTR_SAMPLE:
7f8a436e 2334 err = validate_and_copy_sample(net, a, key, depth, sfa,
05da5898 2335 eth_type, vlan_tci, log);
e6445719
PS
2336 if (err)
2337 return err;
2338 skip_copy = true;
2339 break;
2340
7f8a436e
JS
2341 case OVS_ACTION_ATTR_CT:
2342 err = ovs_ct_copy_action(net, a, key, sfa, log);
2343 if (err)
2344 return err;
2345 skip_copy = true;
2346 break;
2347
e6445719 2348 default:
05da5898 2349 OVS_NLERR(log, "Unknown Action type %d", type);
e6445719
PS
2350 return -EINVAL;
2351 }
2352 if (!skip_copy) {
05da5898 2353 err = copy_action(a, sfa, log);
e6445719
PS
2354 if (err)
2355 return err;
2356 }
2357 }
2358
2359 if (rem > 0)
2360 return -EINVAL;
2361
2362 return 0;
2363}
2364
83d2b9ba 2365/* 'key' must be the masked key. */
7f8a436e 2366int ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
25cd9ba0 2367 const struct sw_flow_key *key,
05da5898 2368 struct sw_flow_actions **sfa, bool log)
25cd9ba0 2369{
2fdb957d
PS
2370 int err;
2371
05da5898 2372 *sfa = nla_alloc_flow_actions(nla_len(attr), log);
2fdb957d
PS
2373 if (IS_ERR(*sfa))
2374 return PTR_ERR(*sfa);
2375
8e2fed1c 2376 (*sfa)->orig_len = nla_len(attr);
7f8a436e 2377 err = __ovs_nla_copy_actions(net, attr, key, 0, sfa, key->eth.type,
05da5898 2378 key->eth.tci, log);
2fdb957d 2379 if (err)
34ae932a 2380 ovs_nla_free_flow_actions(*sfa);
2fdb957d
PS
2381
2382 return err;
25cd9ba0
SH
2383}
2384
e6445719
PS
2385static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb)
2386{
2387 const struct nlattr *a;
2388 struct nlattr *start;
2389 int err = 0, rem;
2390
2391 start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE);
2392 if (!start)
2393 return -EMSGSIZE;
2394
2395 nla_for_each_nested(a, attr, rem) {
2396 int type = nla_type(a);
2397 struct nlattr *st_sample;
2398
2399 switch (type) {
2400 case OVS_SAMPLE_ATTR_PROBABILITY:
2401 if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY,
2402 sizeof(u32), nla_data(a)))
2403 return -EMSGSIZE;
2404 break;
2405 case OVS_SAMPLE_ATTR_ACTIONS:
2406 st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS);
2407 if (!st_sample)
2408 return -EMSGSIZE;
2409 err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb);
2410 if (err)
2411 return err;
2412 nla_nest_end(skb, st_sample);
2413 break;
2414 }
2415 }
2416
2417 nla_nest_end(skb, start);
2418 return err;
2419}
2420
2421static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb)
2422{
2423 const struct nlattr *ovs_key = nla_data(a);
2424 int key_type = nla_type(ovs_key);
2425 struct nlattr *start;
2426 int err;
2427
2428 switch (key_type) {
f0b128c1 2429 case OVS_KEY_ATTR_TUNNEL_INFO: {
34ae932a
TG
2430 struct ovs_tunnel_info *ovs_tun = nla_data(ovs_key);
2431 struct ip_tunnel_info *tun_info = &ovs_tun->tun_dst->u.tun_info;
f0b128c1 2432
e6445719
PS
2433 start = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
2434 if (!start)
2435 return -EMSGSIZE;
2436
fc4099f1 2437 err = ovs_nla_put_tunnel_info(skb, tun_info);
e6445719
PS
2438 if (err)
2439 return err;
2440 nla_nest_end(skb, start);
2441 break;
f0b128c1 2442 }
e6445719
PS
2443 default:
2444 if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key))
2445 return -EMSGSIZE;
2446 break;
2447 }
2448
2449 return 0;
2450}
2451
83d2b9ba
JR
2452static int masked_set_action_to_set_action_attr(const struct nlattr *a,
2453 struct sk_buff *skb)
2454{
2455 const struct nlattr *ovs_key = nla_data(a);
f4f8e738 2456 struct nlattr *nla;
83d2b9ba
JR
2457 size_t key_len = nla_len(ovs_key) / 2;
2458
2459 /* Revert the conversion we did from a non-masked set action to
2460 * masked set action.
2461 */
f4f8e738
JS
2462 nla = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
2463 if (!nla)
83d2b9ba
JR
2464 return -EMSGSIZE;
2465
f4f8e738
JS
2466 if (nla_put(skb, nla_type(ovs_key), key_len, nla_data(ovs_key)))
2467 return -EMSGSIZE;
2468
2469 nla_nest_end(skb, nla);
83d2b9ba
JR
2470 return 0;
2471}
2472
e6445719
PS
2473int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb)
2474{
2475 const struct nlattr *a;
2476 int rem, err;
2477
2478 nla_for_each_attr(a, attr, len, rem) {
2479 int type = nla_type(a);
2480
2481 switch (type) {
2482 case OVS_ACTION_ATTR_SET:
2483 err = set_action_to_attr(a, skb);
2484 if (err)
2485 return err;
2486 break;
2487
83d2b9ba
JR
2488 case OVS_ACTION_ATTR_SET_TO_MASKED:
2489 err = masked_set_action_to_set_action_attr(a, skb);
2490 if (err)
2491 return err;
2492 break;
2493
e6445719
PS
2494 case OVS_ACTION_ATTR_SAMPLE:
2495 err = sample_action_to_attr(a, skb);
2496 if (err)
2497 return err;
2498 break;
7f8a436e
JS
2499
2500 case OVS_ACTION_ATTR_CT:
2501 err = ovs_ct_action_to_attr(nla_data(a), skb);
2502 if (err)
2503 return err;
2504 break;
2505
e6445719
PS
2506 default:
2507 if (nla_put(skb, type, nla_len(a), nla_data(a)))
2508 return -EMSGSIZE;
2509 break;
2510 }
2511 }
2512
2513 return 0;
2514}