2 * Copyright (c) 2007-2014 Nicira, Inc.
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.
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.
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
19 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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>
35 #include <linux/rcupdate.h>
36 #include <linux/if_arp.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>
45 #include <net/geneve.h>
48 #include <net/ndisc.h>
50 #include <net/vxlan.h>
52 #include "flow_netlink.h"
56 const struct ovs_len_tbl
*next
;
59 #define OVS_ATTR_NESTED -1
61 static void update_range(struct sw_flow_match
*match
,
62 size_t offset
, size_t size
, bool is_mask
)
64 struct sw_flow_key_range
*range
;
65 size_t start
= rounddown(offset
, sizeof(long));
66 size_t end
= roundup(offset
+ size
, sizeof(long));
69 range
= &match
->range
;
71 range
= &match
->mask
->range
;
73 if (range
->start
== range
->end
) {
79 if (range
->start
> start
)
86 #define SW_FLOW_KEY_PUT(match, field, value, is_mask) \
88 update_range(match, offsetof(struct sw_flow_key, field), \
89 sizeof((match)->key->field), is_mask); \
91 (match)->mask->key.field = value; \
93 (match)->key->field = value; \
96 #define SW_FLOW_KEY_MEMCPY_OFFSET(match, offset, value_p, len, is_mask) \
98 update_range(match, offset, len, is_mask); \
100 memcpy((u8 *)&(match)->mask->key + offset, value_p, \
103 memcpy((u8 *)(match)->key + offset, value_p, len); \
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)
110 #define SW_FLOW_KEY_MEMSET_FIELD(match, field, value, is_mask) \
112 update_range(match, offsetof(struct sw_flow_key, field), \
113 sizeof((match)->key->field), is_mask); \
115 memset((u8 *)&(match)->mask->key.field, value, \
116 sizeof((match)->mask->key.field)); \
118 memset((u8 *)&(match)->key->field, value, \
119 sizeof((match)->key->field)); \
122 static bool match_validate(const struct sw_flow_match
*match
,
123 u64 key_attrs
, u64 mask_attrs
, bool log
)
125 u64 key_expected
= 1 << OVS_KEY_ATTR_ETHERNET
;
126 u64 mask_allowed
= key_attrs
; /* At most allow all key attributes */
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
)
133 | (1 << OVS_KEY_ATTR_TCP_FLAGS
)
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
)
139 | (1 << OVS_KEY_ATTR_ND
)
140 | (1 << OVS_KEY_ATTR_MPLS
));
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
));
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
;
151 if (match
->mask
&& (match
->mask
->key
.eth
.type
== htons(0xffff)))
152 mask_allowed
|= 1 << OVS_KEY_ATTR_ARP
;
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
;
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
;
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
;
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
;
179 if (match
->key
->ip
.proto
== IPPROTO_TCP
) {
180 key_expected
|= 1 << OVS_KEY_ATTR_TCP
;
181 key_expected
|= 1 << OVS_KEY_ATTR_TCP_FLAGS
;
182 if (match
->mask
&& (match
->mask
->key
.ip
.proto
== 0xff)) {
183 mask_allowed
|= 1 << OVS_KEY_ATTR_TCP
;
184 mask_allowed
|= 1 << OVS_KEY_ATTR_TCP_FLAGS
;
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
;
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
;
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
;
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
;
214 if (match
->key
->ip
.proto
== IPPROTO_TCP
) {
215 key_expected
|= 1 << OVS_KEY_ATTR_TCP
;
216 key_expected
|= 1 << OVS_KEY_ATTR_TCP_FLAGS
;
217 if (match
->mask
&& (match
->mask
->key
.ip
.proto
== 0xff)) {
218 mask_allowed
|= 1 << OVS_KEY_ATTR_TCP
;
219 mask_allowed
|= 1 << OVS_KEY_ATTR_TCP_FLAGS
;
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
;
228 if (match
->key
->tp
.src
==
229 htons(NDISC_NEIGHBOUR_SOLICITATION
) ||
230 match
->key
->tp
.src
== htons(NDISC_NEIGHBOUR_ADVERTISEMENT
)) {
231 key_expected
|= 1 << OVS_KEY_ATTR_ND
;
232 if (match
->mask
&& (match
->mask
->key
.tp
.src
== htons(0xff)))
233 mask_allowed
|= 1 << OVS_KEY_ATTR_ND
;
239 if ((key_attrs
& key_expected
) != key_expected
) {
240 /* Key attributes check failed. */
241 OVS_NLERR(log
, "Missing key (keys=%llx, expected=%llx)",
242 (unsigned long long)key_attrs
,
243 (unsigned long long)key_expected
);
247 if ((mask_attrs
& mask_allowed
) != mask_attrs
) {
248 /* Mask attributes check failed. */
249 OVS_NLERR(log
, "Unexpected mask (mask=%llx, allowed=%llx)",
250 (unsigned long long)mask_attrs
,
251 (unsigned long long)mask_allowed
);
258 size_t ovs_tun_key_attr_size(void)
260 /* Whenever adding new OVS_TUNNEL_KEY_ FIELDS, we should consider
261 * updating this function.
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 */
272 /* OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS is mutually exclusive with
273 * OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS and covered by it.
275 + nla_total_size(2) /* OVS_TUNNEL_KEY_ATTR_TP_SRC */
276 + nla_total_size(2); /* OVS_TUNNEL_KEY_ATTR_TP_DST */
279 size_t ovs_key_attr_size(void)
281 /* Whenever adding new OVS_KEY_ FIELDS, we should consider
282 * updating this function.
284 BUILD_BUG_ON(OVS_KEY_ATTR_TUNNEL_INFO
!= 26);
286 return nla_total_size(4) /* OVS_KEY_ATTR_PRIORITY */
287 + nla_total_size(0) /* OVS_KEY_ATTR_TUNNEL */
288 + ovs_tun_key_attr_size()
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 */
293 + nla_total_size(1) /* OVS_KEY_ATTR_CT_STATE */
294 + nla_total_size(2) /* OVS_KEY_ATTR_CT_ZONE */
295 + nla_total_size(4) /* OVS_KEY_ATTR_CT_MARK */
296 + nla_total_size(16) /* OVS_KEY_ATTR_CT_LABEL */
297 + nla_total_size(12) /* OVS_KEY_ATTR_ETHERNET */
298 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
299 + nla_total_size(4) /* OVS_KEY_ATTR_VLAN */
300 + nla_total_size(0) /* OVS_KEY_ATTR_ENCAP */
301 + nla_total_size(2) /* OVS_KEY_ATTR_ETHERTYPE */
302 + nla_total_size(40) /* OVS_KEY_ATTR_IPV6 */
303 + nla_total_size(2) /* OVS_KEY_ATTR_ICMPV6 */
304 + nla_total_size(28); /* OVS_KEY_ATTR_ND */
307 static const struct ovs_len_tbl ovs_tunnel_key_lens
[OVS_TUNNEL_KEY_ATTR_MAX
+ 1] = {
308 [OVS_TUNNEL_KEY_ATTR_ID
] = { .len
= sizeof(u64
) },
309 [OVS_TUNNEL_KEY_ATTR_IPV4_SRC
] = { .len
= sizeof(u32
) },
310 [OVS_TUNNEL_KEY_ATTR_IPV4_DST
] = { .len
= sizeof(u32
) },
311 [OVS_TUNNEL_KEY_ATTR_TOS
] = { .len
= 1 },
312 [OVS_TUNNEL_KEY_ATTR_TTL
] = { .len
= 1 },
313 [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT
] = { .len
= 0 },
314 [OVS_TUNNEL_KEY_ATTR_CSUM
] = { .len
= 0 },
315 [OVS_TUNNEL_KEY_ATTR_TP_SRC
] = { .len
= sizeof(u16
) },
316 [OVS_TUNNEL_KEY_ATTR_TP_DST
] = { .len
= sizeof(u16
) },
317 [OVS_TUNNEL_KEY_ATTR_OAM
] = { .len
= 0 },
318 [OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS
] = { .len
= OVS_ATTR_NESTED
},
319 [OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS
] = { .len
= OVS_ATTR_NESTED
},
322 /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */
323 static const struct ovs_len_tbl ovs_key_lens
[OVS_KEY_ATTR_MAX
+ 1] = {
324 [OVS_KEY_ATTR_ENCAP
] = { .len
= OVS_ATTR_NESTED
},
325 [OVS_KEY_ATTR_PRIORITY
] = { .len
= sizeof(u32
) },
326 [OVS_KEY_ATTR_IN_PORT
] = { .len
= sizeof(u32
) },
327 [OVS_KEY_ATTR_SKB_MARK
] = { .len
= sizeof(u32
) },
328 [OVS_KEY_ATTR_ETHERNET
] = { .len
= sizeof(struct ovs_key_ethernet
) },
329 [OVS_KEY_ATTR_VLAN
] = { .len
= sizeof(__be16
) },
330 [OVS_KEY_ATTR_ETHERTYPE
] = { .len
= sizeof(__be16
) },
331 [OVS_KEY_ATTR_IPV4
] = { .len
= sizeof(struct ovs_key_ipv4
) },
332 [OVS_KEY_ATTR_IPV6
] = { .len
= sizeof(struct ovs_key_ipv6
) },
333 [OVS_KEY_ATTR_TCP
] = { .len
= sizeof(struct ovs_key_tcp
) },
334 [OVS_KEY_ATTR_TCP_FLAGS
] = { .len
= sizeof(__be16
) },
335 [OVS_KEY_ATTR_UDP
] = { .len
= sizeof(struct ovs_key_udp
) },
336 [OVS_KEY_ATTR_SCTP
] = { .len
= sizeof(struct ovs_key_sctp
) },
337 [OVS_KEY_ATTR_ICMP
] = { .len
= sizeof(struct ovs_key_icmp
) },
338 [OVS_KEY_ATTR_ICMPV6
] = { .len
= sizeof(struct ovs_key_icmpv6
) },
339 [OVS_KEY_ATTR_ARP
] = { .len
= sizeof(struct ovs_key_arp
) },
340 [OVS_KEY_ATTR_ND
] = { .len
= sizeof(struct ovs_key_nd
) },
341 [OVS_KEY_ATTR_RECIRC_ID
] = { .len
= sizeof(u32
) },
342 [OVS_KEY_ATTR_DP_HASH
] = { .len
= sizeof(u32
) },
343 [OVS_KEY_ATTR_TUNNEL
] = { .len
= OVS_ATTR_NESTED
,
344 .next
= ovs_tunnel_key_lens
, },
345 [OVS_KEY_ATTR_MPLS
] = { .len
= sizeof(struct ovs_key_mpls
) },
346 [OVS_KEY_ATTR_CT_STATE
] = { .len
= sizeof(u8
) },
347 [OVS_KEY_ATTR_CT_ZONE
] = { .len
= sizeof(u16
) },
348 [OVS_KEY_ATTR_CT_MARK
] = { .len
= sizeof(u32
) },
349 [OVS_KEY_ATTR_CT_LABEL
] = { .len
= sizeof(struct ovs_key_ct_label
) },
352 static bool is_all_zero(const u8
*fp
, size_t size
)
359 for (i
= 0; i
< size
; i
++)
366 static int __parse_flow_nlattrs(const struct nlattr
*attr
,
367 const struct nlattr
*a
[],
368 u64
*attrsp
, bool log
, bool nz
)
370 const struct nlattr
*nla
;
375 nla_for_each_nested(nla
, attr
, rem
) {
376 u16 type
= nla_type(nla
);
379 if (type
> OVS_KEY_ATTR_MAX
) {
380 OVS_NLERR(log
, "Key type %d is out of range max %d",
381 type
, OVS_KEY_ATTR_MAX
);
385 if (attrs
& (1 << type
)) {
386 OVS_NLERR(log
, "Duplicate key (type %d).", type
);
390 expected_len
= ovs_key_lens
[type
].len
;
391 if (nla_len(nla
) != expected_len
&& expected_len
!= OVS_ATTR_NESTED
) {
392 OVS_NLERR(log
, "Key %d has unexpected len %d expected %d",
393 type
, nla_len(nla
), expected_len
);
397 if (!nz
|| !is_all_zero(nla_data(nla
), expected_len
)) {
403 OVS_NLERR(log
, "Message has %d unknown bytes.", rem
);
411 static int parse_flow_mask_nlattrs(const struct nlattr
*attr
,
412 const struct nlattr
*a
[], u64
*attrsp
,
415 return __parse_flow_nlattrs(attr
, a
, attrsp
, log
, true);
418 static int parse_flow_nlattrs(const struct nlattr
*attr
,
419 const struct nlattr
*a
[], u64
*attrsp
,
422 return __parse_flow_nlattrs(attr
, a
, attrsp
, log
, false);
425 static int genev_tun_opt_from_nlattr(const struct nlattr
*a
,
426 struct sw_flow_match
*match
, bool is_mask
,
429 unsigned long opt_key_offset
;
431 if (nla_len(a
) > sizeof(match
->key
->tun_opts
)) {
432 OVS_NLERR(log
, "Geneve option length err (len %d, max %zu).",
433 nla_len(a
), sizeof(match
->key
->tun_opts
));
437 if (nla_len(a
) % 4 != 0) {
438 OVS_NLERR(log
, "Geneve opt len %d is not a multiple of 4.",
443 /* We need to record the length of the options passed
444 * down, otherwise packets with the same format but
445 * additional options will be silently matched.
448 SW_FLOW_KEY_PUT(match
, tun_opts_len
, nla_len(a
),
451 /* This is somewhat unusual because it looks at
452 * both the key and mask while parsing the
453 * attributes (and by extension assumes the key
454 * is parsed first). Normally, we would verify
455 * that each is the correct length and that the
456 * attributes line up in the validate function.
457 * However, that is difficult because this is
458 * variable length and we won't have the
461 if (match
->key
->tun_opts_len
!= nla_len(a
)) {
462 OVS_NLERR(log
, "Geneve option len %d != mask len %d",
463 match
->key
->tun_opts_len
, nla_len(a
));
467 SW_FLOW_KEY_PUT(match
, tun_opts_len
, 0xff, true);
470 opt_key_offset
= TUN_METADATA_OFFSET(nla_len(a
));
471 SW_FLOW_KEY_MEMCPY_OFFSET(match
, opt_key_offset
, nla_data(a
),
472 nla_len(a
), is_mask
);
476 static const struct nla_policy vxlan_opt_policy
[OVS_VXLAN_EXT_MAX
+ 1] = {
477 [OVS_VXLAN_EXT_GBP
] = { .type
= NLA_U32
},
480 static int vxlan_tun_opt_from_nlattr(const struct nlattr
*a
,
481 struct sw_flow_match
*match
, bool is_mask
,
484 struct nlattr
*tb
[OVS_VXLAN_EXT_MAX
+1];
485 unsigned long opt_key_offset
;
486 struct vxlan_metadata opts
;
489 BUILD_BUG_ON(sizeof(opts
) > sizeof(match
->key
->tun_opts
));
491 err
= nla_parse_nested(tb
, OVS_VXLAN_EXT_MAX
, a
, vxlan_opt_policy
);
495 memset(&opts
, 0, sizeof(opts
));
497 if (tb
[OVS_VXLAN_EXT_GBP
])
498 opts
.gbp
= nla_get_u32(tb
[OVS_VXLAN_EXT_GBP
]);
501 SW_FLOW_KEY_PUT(match
, tun_opts_len
, sizeof(opts
), false);
503 SW_FLOW_KEY_PUT(match
, tun_opts_len
, 0xff, true);
505 opt_key_offset
= TUN_METADATA_OFFSET(sizeof(opts
));
506 SW_FLOW_KEY_MEMCPY_OFFSET(match
, opt_key_offset
, &opts
, sizeof(opts
),
511 static int ipv4_tun_from_nlattr(const struct nlattr
*attr
,
512 struct sw_flow_match
*match
, bool is_mask
,
518 __be16 tun_flags
= 0;
521 nla_for_each_nested(a
, attr
, rem
) {
522 int type
= nla_type(a
);
525 if (type
> OVS_TUNNEL_KEY_ATTR_MAX
) {
526 OVS_NLERR(log
, "Tunnel attr %d out of range max %d",
527 type
, OVS_TUNNEL_KEY_ATTR_MAX
);
531 if (ovs_tunnel_key_lens
[type
].len
!= nla_len(a
) &&
532 ovs_tunnel_key_lens
[type
].len
!= OVS_ATTR_NESTED
) {
533 OVS_NLERR(log
, "Tunnel attr %d has unexpected len %d expected %d",
534 type
, nla_len(a
), ovs_tunnel_key_lens
[type
].len
);
539 case OVS_TUNNEL_KEY_ATTR_ID
:
540 SW_FLOW_KEY_PUT(match
, tun_key
.tun_id
,
541 nla_get_be64(a
), is_mask
);
542 tun_flags
|= TUNNEL_KEY
;
544 case OVS_TUNNEL_KEY_ATTR_IPV4_SRC
:
545 SW_FLOW_KEY_PUT(match
, tun_key
.u
.ipv4
.src
,
546 nla_get_in_addr(a
), is_mask
);
548 case OVS_TUNNEL_KEY_ATTR_IPV4_DST
:
549 SW_FLOW_KEY_PUT(match
, tun_key
.u
.ipv4
.dst
,
550 nla_get_in_addr(a
), is_mask
);
552 case OVS_TUNNEL_KEY_ATTR_TOS
:
553 SW_FLOW_KEY_PUT(match
, tun_key
.tos
,
554 nla_get_u8(a
), is_mask
);
556 case OVS_TUNNEL_KEY_ATTR_TTL
:
557 SW_FLOW_KEY_PUT(match
, tun_key
.ttl
,
558 nla_get_u8(a
), is_mask
);
561 case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT
:
562 tun_flags
|= TUNNEL_DONT_FRAGMENT
;
564 case OVS_TUNNEL_KEY_ATTR_CSUM
:
565 tun_flags
|= TUNNEL_CSUM
;
567 case OVS_TUNNEL_KEY_ATTR_TP_SRC
:
568 SW_FLOW_KEY_PUT(match
, tun_key
.tp_src
,
569 nla_get_be16(a
), is_mask
);
571 case OVS_TUNNEL_KEY_ATTR_TP_DST
:
572 SW_FLOW_KEY_PUT(match
, tun_key
.tp_dst
,
573 nla_get_be16(a
), is_mask
);
575 case OVS_TUNNEL_KEY_ATTR_OAM
:
576 tun_flags
|= TUNNEL_OAM
;
578 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS
:
580 OVS_NLERR(log
, "Multiple metadata blocks provided");
584 err
= genev_tun_opt_from_nlattr(a
, match
, is_mask
, log
);
588 tun_flags
|= TUNNEL_GENEVE_OPT
;
591 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS
:
593 OVS_NLERR(log
, "Multiple metadata blocks provided");
597 err
= vxlan_tun_opt_from_nlattr(a
, match
, is_mask
, log
);
601 tun_flags
|= TUNNEL_VXLAN_OPT
;
605 OVS_NLERR(log
, "Unknown IPv4 tunnel attribute %d",
611 SW_FLOW_KEY_PUT(match
, tun_key
.tun_flags
, tun_flags
, is_mask
);
614 OVS_NLERR(log
, "IPv4 tunnel attribute has %d unknown bytes.",
620 if (!match
->key
->tun_key
.u
.ipv4
.dst
) {
621 OVS_NLERR(log
, "IPv4 tunnel dst address is zero");
626 OVS_NLERR(log
, "IPv4 tunnel TTL not specified.");
634 static int vxlan_opt_to_nlattr(struct sk_buff
*skb
,
635 const void *tun_opts
, int swkey_tun_opts_len
)
637 const struct vxlan_metadata
*opts
= tun_opts
;
640 nla
= nla_nest_start(skb
, OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS
);
644 if (nla_put_u32(skb
, OVS_VXLAN_EXT_GBP
, opts
->gbp
) < 0)
647 nla_nest_end(skb
, nla
);
651 static int __ipv4_tun_to_nlattr(struct sk_buff
*skb
,
652 const struct ip_tunnel_key
*output
,
653 const void *tun_opts
, int swkey_tun_opts_len
)
655 if (output
->tun_flags
& TUNNEL_KEY
&&
656 nla_put_be64(skb
, OVS_TUNNEL_KEY_ATTR_ID
, output
->tun_id
))
658 if (output
->u
.ipv4
.src
&&
659 nla_put_in_addr(skb
, OVS_TUNNEL_KEY_ATTR_IPV4_SRC
,
662 if (output
->u
.ipv4
.dst
&&
663 nla_put_in_addr(skb
, OVS_TUNNEL_KEY_ATTR_IPV4_DST
,
667 nla_put_u8(skb
, OVS_TUNNEL_KEY_ATTR_TOS
, output
->tos
))
669 if (nla_put_u8(skb
, OVS_TUNNEL_KEY_ATTR_TTL
, output
->ttl
))
671 if ((output
->tun_flags
& TUNNEL_DONT_FRAGMENT
) &&
672 nla_put_flag(skb
, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT
))
674 if ((output
->tun_flags
& TUNNEL_CSUM
) &&
675 nla_put_flag(skb
, OVS_TUNNEL_KEY_ATTR_CSUM
))
677 if (output
->tp_src
&&
678 nla_put_be16(skb
, OVS_TUNNEL_KEY_ATTR_TP_SRC
, output
->tp_src
))
680 if (output
->tp_dst
&&
681 nla_put_be16(skb
, OVS_TUNNEL_KEY_ATTR_TP_DST
, output
->tp_dst
))
683 if ((output
->tun_flags
& TUNNEL_OAM
) &&
684 nla_put_flag(skb
, OVS_TUNNEL_KEY_ATTR_OAM
))
687 if (output
->tun_flags
& TUNNEL_GENEVE_OPT
&&
688 nla_put(skb
, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS
,
689 swkey_tun_opts_len
, tun_opts
))
691 else if (output
->tun_flags
& TUNNEL_VXLAN_OPT
&&
692 vxlan_opt_to_nlattr(skb
, tun_opts
, swkey_tun_opts_len
))
699 static int ipv4_tun_to_nlattr(struct sk_buff
*skb
,
700 const struct ip_tunnel_key
*output
,
701 const void *tun_opts
, int swkey_tun_opts_len
)
706 nla
= nla_nest_start(skb
, OVS_KEY_ATTR_TUNNEL
);
710 err
= __ipv4_tun_to_nlattr(skb
, output
, tun_opts
, swkey_tun_opts_len
);
714 nla_nest_end(skb
, nla
);
718 int ovs_nla_put_egress_tunnel_key(struct sk_buff
*skb
,
719 const struct ip_tunnel_info
*egress_tun_info
,
720 const void *egress_tun_opts
)
722 return __ipv4_tun_to_nlattr(skb
, &egress_tun_info
->key
,
724 egress_tun_info
->options_len
);
727 static int metadata_from_nlattrs(struct net
*net
, struct sw_flow_match
*match
,
728 u64
*attrs
, const struct nlattr
**a
,
729 bool is_mask
, bool log
)
731 if (*attrs
& (1 << OVS_KEY_ATTR_DP_HASH
)) {
732 u32 hash_val
= nla_get_u32(a
[OVS_KEY_ATTR_DP_HASH
]);
734 SW_FLOW_KEY_PUT(match
, ovs_flow_hash
, hash_val
, is_mask
);
735 *attrs
&= ~(1 << OVS_KEY_ATTR_DP_HASH
);
738 if (*attrs
& (1 << OVS_KEY_ATTR_RECIRC_ID
)) {
739 u32 recirc_id
= nla_get_u32(a
[OVS_KEY_ATTR_RECIRC_ID
]);
741 SW_FLOW_KEY_PUT(match
, recirc_id
, recirc_id
, is_mask
);
742 *attrs
&= ~(1 << OVS_KEY_ATTR_RECIRC_ID
);
745 if (*attrs
& (1 << OVS_KEY_ATTR_PRIORITY
)) {
746 SW_FLOW_KEY_PUT(match
, phy
.priority
,
747 nla_get_u32(a
[OVS_KEY_ATTR_PRIORITY
]), is_mask
);
748 *attrs
&= ~(1 << OVS_KEY_ATTR_PRIORITY
);
751 if (*attrs
& (1 << OVS_KEY_ATTR_IN_PORT
)) {
752 u32 in_port
= nla_get_u32(a
[OVS_KEY_ATTR_IN_PORT
]);
755 in_port
= 0xffffffff; /* Always exact match in_port. */
756 } else if (in_port
>= DP_MAX_PORTS
) {
757 OVS_NLERR(log
, "Port %d exceeds max allowable %d",
758 in_port
, DP_MAX_PORTS
);
762 SW_FLOW_KEY_PUT(match
, phy
.in_port
, in_port
, is_mask
);
763 *attrs
&= ~(1 << OVS_KEY_ATTR_IN_PORT
);
764 } else if (!is_mask
) {
765 SW_FLOW_KEY_PUT(match
, phy
.in_port
, DP_MAX_PORTS
, is_mask
);
768 if (*attrs
& (1 << OVS_KEY_ATTR_SKB_MARK
)) {
769 uint32_t mark
= nla_get_u32(a
[OVS_KEY_ATTR_SKB_MARK
]);
771 SW_FLOW_KEY_PUT(match
, phy
.skb_mark
, mark
, is_mask
);
772 *attrs
&= ~(1 << OVS_KEY_ATTR_SKB_MARK
);
774 if (*attrs
& (1 << OVS_KEY_ATTR_TUNNEL
)) {
775 if (ipv4_tun_from_nlattr(a
[OVS_KEY_ATTR_TUNNEL
], match
,
778 *attrs
&= ~(1 << OVS_KEY_ATTR_TUNNEL
);
781 if (*attrs
& (1 << OVS_KEY_ATTR_CT_STATE
) &&
782 ovs_ct_verify(net
, OVS_KEY_ATTR_CT_STATE
)) {
783 u8 ct_state
= nla_get_u8(a
[OVS_KEY_ATTR_CT_STATE
]);
785 SW_FLOW_KEY_PUT(match
, ct
.state
, ct_state
, is_mask
);
786 *attrs
&= ~(1ULL << OVS_KEY_ATTR_CT_STATE
);
788 if (*attrs
& (1 << OVS_KEY_ATTR_CT_ZONE
) &&
789 ovs_ct_verify(net
, OVS_KEY_ATTR_CT_ZONE
)) {
790 u16 ct_zone
= nla_get_u16(a
[OVS_KEY_ATTR_CT_ZONE
]);
792 SW_FLOW_KEY_PUT(match
, ct
.zone
, ct_zone
, is_mask
);
793 *attrs
&= ~(1ULL << OVS_KEY_ATTR_CT_ZONE
);
795 if (*attrs
& (1 << OVS_KEY_ATTR_CT_MARK
) &&
796 ovs_ct_verify(net
, OVS_KEY_ATTR_CT_MARK
)) {
797 u32 mark
= nla_get_u32(a
[OVS_KEY_ATTR_CT_MARK
]);
799 SW_FLOW_KEY_PUT(match
, ct
.mark
, mark
, is_mask
);
800 *attrs
&= ~(1ULL << OVS_KEY_ATTR_CT_MARK
);
802 if (*attrs
& (1 << OVS_KEY_ATTR_CT_LABEL
) &&
803 ovs_ct_verify(net
, OVS_KEY_ATTR_CT_LABEL
)) {
804 const struct ovs_key_ct_label
*cl
;
806 cl
= nla_data(a
[OVS_KEY_ATTR_CT_LABEL
]);
807 SW_FLOW_KEY_MEMCPY(match
, ct
.label
, cl
->ct_label
,
808 sizeof(*cl
), is_mask
);
809 *attrs
&= ~(1ULL << OVS_KEY_ATTR_CT_LABEL
);
814 static int ovs_key_from_nlattrs(struct net
*net
, struct sw_flow_match
*match
,
815 u64 attrs
, const struct nlattr
**a
,
816 bool is_mask
, bool log
)
820 err
= metadata_from_nlattrs(net
, match
, &attrs
, a
, is_mask
, log
);
824 if (attrs
& (1 << OVS_KEY_ATTR_ETHERNET
)) {
825 const struct ovs_key_ethernet
*eth_key
;
827 eth_key
= nla_data(a
[OVS_KEY_ATTR_ETHERNET
]);
828 SW_FLOW_KEY_MEMCPY(match
, eth
.src
,
829 eth_key
->eth_src
, ETH_ALEN
, is_mask
);
830 SW_FLOW_KEY_MEMCPY(match
, eth
.dst
,
831 eth_key
->eth_dst
, ETH_ALEN
, is_mask
);
832 attrs
&= ~(1 << OVS_KEY_ATTR_ETHERNET
);
835 if (attrs
& (1 << OVS_KEY_ATTR_VLAN
)) {
838 tci
= nla_get_be16(a
[OVS_KEY_ATTR_VLAN
]);
839 if (!(tci
& htons(VLAN_TAG_PRESENT
))) {
841 OVS_NLERR(log
, "VLAN TCI mask does not have exact match for VLAN_TAG_PRESENT bit.");
843 OVS_NLERR(log
, "VLAN TCI does not have VLAN_TAG_PRESENT bit set.");
848 SW_FLOW_KEY_PUT(match
, eth
.tci
, tci
, is_mask
);
849 attrs
&= ~(1 << OVS_KEY_ATTR_VLAN
);
852 if (attrs
& (1 << OVS_KEY_ATTR_ETHERTYPE
)) {
855 eth_type
= nla_get_be16(a
[OVS_KEY_ATTR_ETHERTYPE
]);
857 /* Always exact match EtherType. */
858 eth_type
= htons(0xffff);
859 } else if (!eth_proto_is_802_3(eth_type
)) {
860 OVS_NLERR(log
, "EtherType %x is less than min %x",
861 ntohs(eth_type
), ETH_P_802_3_MIN
);
865 SW_FLOW_KEY_PUT(match
, eth
.type
, eth_type
, is_mask
);
866 attrs
&= ~(1 << OVS_KEY_ATTR_ETHERTYPE
);
867 } else if (!is_mask
) {
868 SW_FLOW_KEY_PUT(match
, eth
.type
, htons(ETH_P_802_2
), is_mask
);
871 if (attrs
& (1 << OVS_KEY_ATTR_IPV4
)) {
872 const struct ovs_key_ipv4
*ipv4_key
;
874 ipv4_key
= nla_data(a
[OVS_KEY_ATTR_IPV4
]);
875 if (!is_mask
&& ipv4_key
->ipv4_frag
> OVS_FRAG_TYPE_MAX
) {
876 OVS_NLERR(log
, "IPv4 frag type %d is out of range max %d",
877 ipv4_key
->ipv4_frag
, OVS_FRAG_TYPE_MAX
);
880 SW_FLOW_KEY_PUT(match
, ip
.proto
,
881 ipv4_key
->ipv4_proto
, is_mask
);
882 SW_FLOW_KEY_PUT(match
, ip
.tos
,
883 ipv4_key
->ipv4_tos
, is_mask
);
884 SW_FLOW_KEY_PUT(match
, ip
.ttl
,
885 ipv4_key
->ipv4_ttl
, is_mask
);
886 SW_FLOW_KEY_PUT(match
, ip
.frag
,
887 ipv4_key
->ipv4_frag
, is_mask
);
888 SW_FLOW_KEY_PUT(match
, ipv4
.addr
.src
,
889 ipv4_key
->ipv4_src
, is_mask
);
890 SW_FLOW_KEY_PUT(match
, ipv4
.addr
.dst
,
891 ipv4_key
->ipv4_dst
, is_mask
);
892 attrs
&= ~(1 << OVS_KEY_ATTR_IPV4
);
895 if (attrs
& (1 << OVS_KEY_ATTR_IPV6
)) {
896 const struct ovs_key_ipv6
*ipv6_key
;
898 ipv6_key
= nla_data(a
[OVS_KEY_ATTR_IPV6
]);
899 if (!is_mask
&& ipv6_key
->ipv6_frag
> OVS_FRAG_TYPE_MAX
) {
900 OVS_NLERR(log
, "IPv6 frag type %d is out of range max %d",
901 ipv6_key
->ipv6_frag
, OVS_FRAG_TYPE_MAX
);
905 if (!is_mask
&& ipv6_key
->ipv6_label
& htonl(0xFFF00000)) {
906 OVS_NLERR(log
, "IPv6 flow label %x is out of range (max=%x).\n",
907 ntohl(ipv6_key
->ipv6_label
), (1 << 20) - 1);
911 SW_FLOW_KEY_PUT(match
, ipv6
.label
,
912 ipv6_key
->ipv6_label
, is_mask
);
913 SW_FLOW_KEY_PUT(match
, ip
.proto
,
914 ipv6_key
->ipv6_proto
, is_mask
);
915 SW_FLOW_KEY_PUT(match
, ip
.tos
,
916 ipv6_key
->ipv6_tclass
, is_mask
);
917 SW_FLOW_KEY_PUT(match
, ip
.ttl
,
918 ipv6_key
->ipv6_hlimit
, is_mask
);
919 SW_FLOW_KEY_PUT(match
, ip
.frag
,
920 ipv6_key
->ipv6_frag
, is_mask
);
921 SW_FLOW_KEY_MEMCPY(match
, ipv6
.addr
.src
,
923 sizeof(match
->key
->ipv6
.addr
.src
),
925 SW_FLOW_KEY_MEMCPY(match
, ipv6
.addr
.dst
,
927 sizeof(match
->key
->ipv6
.addr
.dst
),
930 attrs
&= ~(1 << OVS_KEY_ATTR_IPV6
);
933 if (attrs
& (1 << OVS_KEY_ATTR_ARP
)) {
934 const struct ovs_key_arp
*arp_key
;
936 arp_key
= nla_data(a
[OVS_KEY_ATTR_ARP
]);
937 if (!is_mask
&& (arp_key
->arp_op
& htons(0xff00))) {
938 OVS_NLERR(log
, "Unknown ARP opcode (opcode=%d).",
943 SW_FLOW_KEY_PUT(match
, ipv4
.addr
.src
,
944 arp_key
->arp_sip
, is_mask
);
945 SW_FLOW_KEY_PUT(match
, ipv4
.addr
.dst
,
946 arp_key
->arp_tip
, is_mask
);
947 SW_FLOW_KEY_PUT(match
, ip
.proto
,
948 ntohs(arp_key
->arp_op
), is_mask
);
949 SW_FLOW_KEY_MEMCPY(match
, ipv4
.arp
.sha
,
950 arp_key
->arp_sha
, ETH_ALEN
, is_mask
);
951 SW_FLOW_KEY_MEMCPY(match
, ipv4
.arp
.tha
,
952 arp_key
->arp_tha
, ETH_ALEN
, is_mask
);
954 attrs
&= ~(1 << OVS_KEY_ATTR_ARP
);
957 if (attrs
& (1 << OVS_KEY_ATTR_MPLS
)) {
958 const struct ovs_key_mpls
*mpls_key
;
960 mpls_key
= nla_data(a
[OVS_KEY_ATTR_MPLS
]);
961 SW_FLOW_KEY_PUT(match
, mpls
.top_lse
,
962 mpls_key
->mpls_lse
, is_mask
);
964 attrs
&= ~(1 << OVS_KEY_ATTR_MPLS
);
967 if (attrs
& (1 << OVS_KEY_ATTR_TCP
)) {
968 const struct ovs_key_tcp
*tcp_key
;
970 tcp_key
= nla_data(a
[OVS_KEY_ATTR_TCP
]);
971 SW_FLOW_KEY_PUT(match
, tp
.src
, tcp_key
->tcp_src
, is_mask
);
972 SW_FLOW_KEY_PUT(match
, tp
.dst
, tcp_key
->tcp_dst
, is_mask
);
973 attrs
&= ~(1 << OVS_KEY_ATTR_TCP
);
976 if (attrs
& (1 << OVS_KEY_ATTR_TCP_FLAGS
)) {
977 SW_FLOW_KEY_PUT(match
, tp
.flags
,
978 nla_get_be16(a
[OVS_KEY_ATTR_TCP_FLAGS
]),
980 attrs
&= ~(1 << OVS_KEY_ATTR_TCP_FLAGS
);
983 if (attrs
& (1 << OVS_KEY_ATTR_UDP
)) {
984 const struct ovs_key_udp
*udp_key
;
986 udp_key
= nla_data(a
[OVS_KEY_ATTR_UDP
]);
987 SW_FLOW_KEY_PUT(match
, tp
.src
, udp_key
->udp_src
, is_mask
);
988 SW_FLOW_KEY_PUT(match
, tp
.dst
, udp_key
->udp_dst
, is_mask
);
989 attrs
&= ~(1 << OVS_KEY_ATTR_UDP
);
992 if (attrs
& (1 << OVS_KEY_ATTR_SCTP
)) {
993 const struct ovs_key_sctp
*sctp_key
;
995 sctp_key
= nla_data(a
[OVS_KEY_ATTR_SCTP
]);
996 SW_FLOW_KEY_PUT(match
, tp
.src
, sctp_key
->sctp_src
, is_mask
);
997 SW_FLOW_KEY_PUT(match
, tp
.dst
, sctp_key
->sctp_dst
, is_mask
);
998 attrs
&= ~(1 << OVS_KEY_ATTR_SCTP
);
1001 if (attrs
& (1 << OVS_KEY_ATTR_ICMP
)) {
1002 const struct ovs_key_icmp
*icmp_key
;
1004 icmp_key
= nla_data(a
[OVS_KEY_ATTR_ICMP
]);
1005 SW_FLOW_KEY_PUT(match
, tp
.src
,
1006 htons(icmp_key
->icmp_type
), is_mask
);
1007 SW_FLOW_KEY_PUT(match
, tp
.dst
,
1008 htons(icmp_key
->icmp_code
), is_mask
);
1009 attrs
&= ~(1 << OVS_KEY_ATTR_ICMP
);
1012 if (attrs
& (1 << OVS_KEY_ATTR_ICMPV6
)) {
1013 const struct ovs_key_icmpv6
*icmpv6_key
;
1015 icmpv6_key
= nla_data(a
[OVS_KEY_ATTR_ICMPV6
]);
1016 SW_FLOW_KEY_PUT(match
, tp
.src
,
1017 htons(icmpv6_key
->icmpv6_type
), is_mask
);
1018 SW_FLOW_KEY_PUT(match
, tp
.dst
,
1019 htons(icmpv6_key
->icmpv6_code
), is_mask
);
1020 attrs
&= ~(1 << OVS_KEY_ATTR_ICMPV6
);
1023 if (attrs
& (1 << OVS_KEY_ATTR_ND
)) {
1024 const struct ovs_key_nd
*nd_key
;
1026 nd_key
= nla_data(a
[OVS_KEY_ATTR_ND
]);
1027 SW_FLOW_KEY_MEMCPY(match
, ipv6
.nd
.target
,
1029 sizeof(match
->key
->ipv6
.nd
.target
),
1031 SW_FLOW_KEY_MEMCPY(match
, ipv6
.nd
.sll
,
1032 nd_key
->nd_sll
, ETH_ALEN
, is_mask
);
1033 SW_FLOW_KEY_MEMCPY(match
, ipv6
.nd
.tll
,
1034 nd_key
->nd_tll
, ETH_ALEN
, is_mask
);
1035 attrs
&= ~(1 << OVS_KEY_ATTR_ND
);
1039 OVS_NLERR(log
, "Unknown key attributes %llx",
1040 (unsigned long long)attrs
);
1047 static void nlattr_set(struct nlattr
*attr
, u8 val
,
1048 const struct ovs_len_tbl
*tbl
)
1053 /* The nlattr stream should already have been validated */
1054 nla_for_each_nested(nla
, attr
, rem
) {
1055 if (tbl
&& tbl
[nla_type(nla
)].len
== OVS_ATTR_NESTED
)
1056 nlattr_set(nla
, val
, tbl
[nla_type(nla
)].next
);
1058 memset(nla_data(nla
), val
, nla_len(nla
));
1062 static void mask_set_nlattr(struct nlattr
*attr
, u8 val
)
1064 nlattr_set(attr
, val
, ovs_key_lens
);
1068 * ovs_nla_get_match - parses Netlink attributes into a flow key and
1069 * mask. In case the 'mask' is NULL, the flow is treated as exact match
1070 * flow. Otherwise, it is treated as a wildcarded flow, except the mask
1071 * does not include any don't care bit.
1072 * @net: Used to determine per-namespace field support.
1073 * @match: receives the extracted flow match information.
1074 * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
1075 * sequence. The fields should of the packet that triggered the creation
1077 * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink
1078 * attribute specifies the mask field of the wildcarded flow.
1079 * @log: Boolean to allow kernel error logging. Normally true, but when
1080 * probing for feature compatibility this should be passed in as false to
1081 * suppress unnecessary error logging.
1083 int ovs_nla_get_match(struct net
*net
, struct sw_flow_match
*match
,
1084 const struct nlattr
*nla_key
,
1085 const struct nlattr
*nla_mask
,
1088 const struct nlattr
*a
[OVS_KEY_ATTR_MAX
+ 1];
1089 const struct nlattr
*encap
;
1090 struct nlattr
*newmask
= NULL
;
1093 bool encap_valid
= false;
1096 err
= parse_flow_nlattrs(nla_key
, a
, &key_attrs
, log
);
1100 if ((key_attrs
& (1 << OVS_KEY_ATTR_ETHERNET
)) &&
1101 (key_attrs
& (1 << OVS_KEY_ATTR_ETHERTYPE
)) &&
1102 (nla_get_be16(a
[OVS_KEY_ATTR_ETHERTYPE
]) == htons(ETH_P_8021Q
))) {
1105 if (!((key_attrs
& (1 << OVS_KEY_ATTR_VLAN
)) &&
1106 (key_attrs
& (1 << OVS_KEY_ATTR_ENCAP
)))) {
1107 OVS_NLERR(log
, "Invalid Vlan frame.");
1111 key_attrs
&= ~(1 << OVS_KEY_ATTR_ETHERTYPE
);
1112 tci
= nla_get_be16(a
[OVS_KEY_ATTR_VLAN
]);
1113 encap
= a
[OVS_KEY_ATTR_ENCAP
];
1114 key_attrs
&= ~(1 << OVS_KEY_ATTR_ENCAP
);
1117 if (tci
& htons(VLAN_TAG_PRESENT
)) {
1118 err
= parse_flow_nlattrs(encap
, a
, &key_attrs
, log
);
1122 /* Corner case for truncated 802.1Q header. */
1123 if (nla_len(encap
)) {
1124 OVS_NLERR(log
, "Truncated 802.1Q header has non-zero encap attribute.");
1128 OVS_NLERR(log
, "Encap attr is set for non-VLAN frame");
1133 err
= ovs_key_from_nlattrs(net
, match
, key_attrs
, a
, false, log
);
1139 /* Create an exact match mask. We need to set to 0xff
1140 * all the 'match->mask' fields that have been touched
1141 * in 'match->key'. We cannot simply memset
1142 * 'match->mask', because padding bytes and fields not
1143 * specified in 'match->key' should be left to 0.
1144 * Instead, we use a stream of netlink attributes,
1145 * copied from 'key' and set to 0xff.
1146 * ovs_key_from_nlattrs() will take care of filling
1147 * 'match->mask' appropriately.
1149 newmask
= kmemdup(nla_key
,
1150 nla_total_size(nla_len(nla_key
)),
1155 mask_set_nlattr(newmask
, 0xff);
1157 /* The userspace does not send tunnel attributes that
1158 * are 0, but we should not wildcard them nonetheless.
1160 if (match
->key
->tun_key
.u
.ipv4
.dst
)
1161 SW_FLOW_KEY_MEMSET_FIELD(match
, tun_key
,
1167 err
= parse_flow_mask_nlattrs(nla_mask
, a
, &mask_attrs
, log
);
1171 /* Always match on tci. */
1172 SW_FLOW_KEY_PUT(match
, eth
.tci
, htons(0xffff), true);
1174 if (mask_attrs
& 1 << OVS_KEY_ATTR_ENCAP
) {
1175 __be16 eth_type
= 0;
1179 OVS_NLERR(log
, "Encap mask attribute is set for non-VLAN frame.");
1184 mask_attrs
&= ~(1 << OVS_KEY_ATTR_ENCAP
);
1185 if (a
[OVS_KEY_ATTR_ETHERTYPE
])
1186 eth_type
= nla_get_be16(a
[OVS_KEY_ATTR_ETHERTYPE
]);
1188 if (eth_type
== htons(0xffff)) {
1189 mask_attrs
&= ~(1 << OVS_KEY_ATTR_ETHERTYPE
);
1190 encap
= a
[OVS_KEY_ATTR_ENCAP
];
1191 err
= parse_flow_mask_nlattrs(encap
, a
,
1196 OVS_NLERR(log
, "VLAN frames must have an exact match on the TPID (mask=%x).",
1202 if (a
[OVS_KEY_ATTR_VLAN
])
1203 tci
= nla_get_be16(a
[OVS_KEY_ATTR_VLAN
]);
1205 if (!(tci
& htons(VLAN_TAG_PRESENT
))) {
1206 OVS_NLERR(log
, "VLAN tag present bit must have an exact match (tci_mask=%x).",
1213 err
= ovs_key_from_nlattrs(net
, match
, mask_attrs
, a
, true,
1219 if (!match_validate(match
, key_attrs
, mask_attrs
, log
))
1227 static size_t get_ufid_len(const struct nlattr
*attr
, bool log
)
1234 len
= nla_len(attr
);
1235 if (len
< 1 || len
> MAX_UFID_LENGTH
) {
1236 OVS_NLERR(log
, "ufid size %u bytes exceeds the range (1, %d)",
1237 nla_len(attr
), MAX_UFID_LENGTH
);
1244 /* Initializes 'flow->ufid', returning true if 'attr' contains a valid UFID,
1245 * or false otherwise.
1247 bool ovs_nla_get_ufid(struct sw_flow_id
*sfid
, const struct nlattr
*attr
,
1250 sfid
->ufid_len
= get_ufid_len(attr
, log
);
1252 memcpy(sfid
->ufid
, nla_data(attr
), sfid
->ufid_len
);
1254 return sfid
->ufid_len
;
1257 int ovs_nla_get_identifier(struct sw_flow_id
*sfid
, const struct nlattr
*ufid
,
1258 const struct sw_flow_key
*key
, bool log
)
1260 struct sw_flow_key
*new_key
;
1262 if (ovs_nla_get_ufid(sfid
, ufid
, log
))
1265 /* If UFID was not provided, use unmasked key. */
1266 new_key
= kmalloc(sizeof(*new_key
), GFP_KERNEL
);
1269 memcpy(new_key
, key
, sizeof(*key
));
1270 sfid
->unmasked_key
= new_key
;
1275 u32
ovs_nla_get_ufid_flags(const struct nlattr
*attr
)
1277 return attr
? nla_get_u32(attr
) : 0;
1281 * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key.
1282 * @key: Receives extracted in_port, priority, tun_key and skb_mark.
1283 * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
1285 * @log: Boolean to allow kernel error logging. Normally true, but when
1286 * probing for feature compatibility this should be passed in as false to
1287 * suppress unnecessary error logging.
1289 * This parses a series of Netlink attributes that form a flow key, which must
1290 * take the same form accepted by flow_from_nlattrs(), but only enough of it to
1291 * get the metadata, that is, the parts of the flow key that cannot be
1292 * extracted from the packet itself.
1295 int ovs_nla_get_flow_metadata(struct net
*net
, const struct nlattr
*attr
,
1296 struct sw_flow_key
*key
,
1299 const struct nlattr
*a
[OVS_KEY_ATTR_MAX
+ 1];
1300 struct sw_flow_match match
;
1304 err
= parse_flow_nlattrs(attr
, a
, &attrs
, log
);
1308 memset(&match
, 0, sizeof(match
));
1311 memset(&key
->ct
, 0, sizeof(key
->ct
));
1312 key
->phy
.in_port
= DP_MAX_PORTS
;
1314 return metadata_from_nlattrs(net
, &match
, &attrs
, a
, false, log
);
1317 static int __ovs_nla_put_key(const struct sw_flow_key
*swkey
,
1318 const struct sw_flow_key
*output
, bool is_mask
,
1319 struct sk_buff
*skb
)
1321 struct ovs_key_ethernet
*eth_key
;
1322 struct nlattr
*nla
, *encap
;
1324 if (nla_put_u32(skb
, OVS_KEY_ATTR_RECIRC_ID
, output
->recirc_id
))
1325 goto nla_put_failure
;
1327 if (nla_put_u32(skb
, OVS_KEY_ATTR_DP_HASH
, output
->ovs_flow_hash
))
1328 goto nla_put_failure
;
1330 if (nla_put_u32(skb
, OVS_KEY_ATTR_PRIORITY
, output
->phy
.priority
))
1331 goto nla_put_failure
;
1333 if ((swkey
->tun_key
.u
.ipv4
.dst
|| is_mask
)) {
1334 const void *opts
= NULL
;
1336 if (output
->tun_key
.tun_flags
& TUNNEL_OPTIONS_PRESENT
)
1337 opts
= TUN_METADATA_OPTS(output
, swkey
->tun_opts_len
);
1339 if (ipv4_tun_to_nlattr(skb
, &output
->tun_key
, opts
,
1340 swkey
->tun_opts_len
))
1341 goto nla_put_failure
;
1344 if (swkey
->phy
.in_port
== DP_MAX_PORTS
) {
1345 if (is_mask
&& (output
->phy
.in_port
== 0xffff))
1346 if (nla_put_u32(skb
, OVS_KEY_ATTR_IN_PORT
, 0xffffffff))
1347 goto nla_put_failure
;
1350 upper_u16
= !is_mask
? 0 : 0xffff;
1352 if (nla_put_u32(skb
, OVS_KEY_ATTR_IN_PORT
,
1353 (upper_u16
<< 16) | output
->phy
.in_port
))
1354 goto nla_put_failure
;
1357 if (nla_put_u32(skb
, OVS_KEY_ATTR_SKB_MARK
, output
->phy
.skb_mark
))
1358 goto nla_put_failure
;
1360 if (ovs_ct_put_key(output
, skb
))
1361 goto nla_put_failure
;
1363 nla
= nla_reserve(skb
, OVS_KEY_ATTR_ETHERNET
, sizeof(*eth_key
));
1365 goto nla_put_failure
;
1367 eth_key
= nla_data(nla
);
1368 ether_addr_copy(eth_key
->eth_src
, output
->eth
.src
);
1369 ether_addr_copy(eth_key
->eth_dst
, output
->eth
.dst
);
1371 if (swkey
->eth
.tci
|| swkey
->eth
.type
== htons(ETH_P_8021Q
)) {
1373 eth_type
= !is_mask
? htons(ETH_P_8021Q
) : htons(0xffff);
1374 if (nla_put_be16(skb
, OVS_KEY_ATTR_ETHERTYPE
, eth_type
) ||
1375 nla_put_be16(skb
, OVS_KEY_ATTR_VLAN
, output
->eth
.tci
))
1376 goto nla_put_failure
;
1377 encap
= nla_nest_start(skb
, OVS_KEY_ATTR_ENCAP
);
1378 if (!swkey
->eth
.tci
)
1383 if (swkey
->eth
.type
== htons(ETH_P_802_2
)) {
1385 * Ethertype 802.2 is represented in the netlink with omitted
1386 * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and
1387 * 0xffff in the mask attribute. Ethertype can also
1390 if (is_mask
&& output
->eth
.type
)
1391 if (nla_put_be16(skb
, OVS_KEY_ATTR_ETHERTYPE
,
1393 goto nla_put_failure
;
1397 if (nla_put_be16(skb
, OVS_KEY_ATTR_ETHERTYPE
, output
->eth
.type
))
1398 goto nla_put_failure
;
1400 if (swkey
->eth
.type
== htons(ETH_P_IP
)) {
1401 struct ovs_key_ipv4
*ipv4_key
;
1403 nla
= nla_reserve(skb
, OVS_KEY_ATTR_IPV4
, sizeof(*ipv4_key
));
1405 goto nla_put_failure
;
1406 ipv4_key
= nla_data(nla
);
1407 ipv4_key
->ipv4_src
= output
->ipv4
.addr
.src
;
1408 ipv4_key
->ipv4_dst
= output
->ipv4
.addr
.dst
;
1409 ipv4_key
->ipv4_proto
= output
->ip
.proto
;
1410 ipv4_key
->ipv4_tos
= output
->ip
.tos
;
1411 ipv4_key
->ipv4_ttl
= output
->ip
.ttl
;
1412 ipv4_key
->ipv4_frag
= output
->ip
.frag
;
1413 } else if (swkey
->eth
.type
== htons(ETH_P_IPV6
)) {
1414 struct ovs_key_ipv6
*ipv6_key
;
1416 nla
= nla_reserve(skb
, OVS_KEY_ATTR_IPV6
, sizeof(*ipv6_key
));
1418 goto nla_put_failure
;
1419 ipv6_key
= nla_data(nla
);
1420 memcpy(ipv6_key
->ipv6_src
, &output
->ipv6
.addr
.src
,
1421 sizeof(ipv6_key
->ipv6_src
));
1422 memcpy(ipv6_key
->ipv6_dst
, &output
->ipv6
.addr
.dst
,
1423 sizeof(ipv6_key
->ipv6_dst
));
1424 ipv6_key
->ipv6_label
= output
->ipv6
.label
;
1425 ipv6_key
->ipv6_proto
= output
->ip
.proto
;
1426 ipv6_key
->ipv6_tclass
= output
->ip
.tos
;
1427 ipv6_key
->ipv6_hlimit
= output
->ip
.ttl
;
1428 ipv6_key
->ipv6_frag
= output
->ip
.frag
;
1429 } else if (swkey
->eth
.type
== htons(ETH_P_ARP
) ||
1430 swkey
->eth
.type
== htons(ETH_P_RARP
)) {
1431 struct ovs_key_arp
*arp_key
;
1433 nla
= nla_reserve(skb
, OVS_KEY_ATTR_ARP
, sizeof(*arp_key
));
1435 goto nla_put_failure
;
1436 arp_key
= nla_data(nla
);
1437 memset(arp_key
, 0, sizeof(struct ovs_key_arp
));
1438 arp_key
->arp_sip
= output
->ipv4
.addr
.src
;
1439 arp_key
->arp_tip
= output
->ipv4
.addr
.dst
;
1440 arp_key
->arp_op
= htons(output
->ip
.proto
);
1441 ether_addr_copy(arp_key
->arp_sha
, output
->ipv4
.arp
.sha
);
1442 ether_addr_copy(arp_key
->arp_tha
, output
->ipv4
.arp
.tha
);
1443 } else if (eth_p_mpls(swkey
->eth
.type
)) {
1444 struct ovs_key_mpls
*mpls_key
;
1446 nla
= nla_reserve(skb
, OVS_KEY_ATTR_MPLS
, sizeof(*mpls_key
));
1448 goto nla_put_failure
;
1449 mpls_key
= nla_data(nla
);
1450 mpls_key
->mpls_lse
= output
->mpls
.top_lse
;
1453 if ((swkey
->eth
.type
== htons(ETH_P_IP
) ||
1454 swkey
->eth
.type
== htons(ETH_P_IPV6
)) &&
1455 swkey
->ip
.frag
!= OVS_FRAG_TYPE_LATER
) {
1457 if (swkey
->ip
.proto
== IPPROTO_TCP
) {
1458 struct ovs_key_tcp
*tcp_key
;
1460 nla
= nla_reserve(skb
, OVS_KEY_ATTR_TCP
, sizeof(*tcp_key
));
1462 goto nla_put_failure
;
1463 tcp_key
= nla_data(nla
);
1464 tcp_key
->tcp_src
= output
->tp
.src
;
1465 tcp_key
->tcp_dst
= output
->tp
.dst
;
1466 if (nla_put_be16(skb
, OVS_KEY_ATTR_TCP_FLAGS
,
1468 goto nla_put_failure
;
1469 } else if (swkey
->ip
.proto
== IPPROTO_UDP
) {
1470 struct ovs_key_udp
*udp_key
;
1472 nla
= nla_reserve(skb
, OVS_KEY_ATTR_UDP
, sizeof(*udp_key
));
1474 goto nla_put_failure
;
1475 udp_key
= nla_data(nla
);
1476 udp_key
->udp_src
= output
->tp
.src
;
1477 udp_key
->udp_dst
= output
->tp
.dst
;
1478 } else if (swkey
->ip
.proto
== IPPROTO_SCTP
) {
1479 struct ovs_key_sctp
*sctp_key
;
1481 nla
= nla_reserve(skb
, OVS_KEY_ATTR_SCTP
, sizeof(*sctp_key
));
1483 goto nla_put_failure
;
1484 sctp_key
= nla_data(nla
);
1485 sctp_key
->sctp_src
= output
->tp
.src
;
1486 sctp_key
->sctp_dst
= output
->tp
.dst
;
1487 } else if (swkey
->eth
.type
== htons(ETH_P_IP
) &&
1488 swkey
->ip
.proto
== IPPROTO_ICMP
) {
1489 struct ovs_key_icmp
*icmp_key
;
1491 nla
= nla_reserve(skb
, OVS_KEY_ATTR_ICMP
, sizeof(*icmp_key
));
1493 goto nla_put_failure
;
1494 icmp_key
= nla_data(nla
);
1495 icmp_key
->icmp_type
= ntohs(output
->tp
.src
);
1496 icmp_key
->icmp_code
= ntohs(output
->tp
.dst
);
1497 } else if (swkey
->eth
.type
== htons(ETH_P_IPV6
) &&
1498 swkey
->ip
.proto
== IPPROTO_ICMPV6
) {
1499 struct ovs_key_icmpv6
*icmpv6_key
;
1501 nla
= nla_reserve(skb
, OVS_KEY_ATTR_ICMPV6
,
1502 sizeof(*icmpv6_key
));
1504 goto nla_put_failure
;
1505 icmpv6_key
= nla_data(nla
);
1506 icmpv6_key
->icmpv6_type
= ntohs(output
->tp
.src
);
1507 icmpv6_key
->icmpv6_code
= ntohs(output
->tp
.dst
);
1509 if (icmpv6_key
->icmpv6_type
== NDISC_NEIGHBOUR_SOLICITATION
||
1510 icmpv6_key
->icmpv6_type
== NDISC_NEIGHBOUR_ADVERTISEMENT
) {
1511 struct ovs_key_nd
*nd_key
;
1513 nla
= nla_reserve(skb
, OVS_KEY_ATTR_ND
, sizeof(*nd_key
));
1515 goto nla_put_failure
;
1516 nd_key
= nla_data(nla
);
1517 memcpy(nd_key
->nd_target
, &output
->ipv6
.nd
.target
,
1518 sizeof(nd_key
->nd_target
));
1519 ether_addr_copy(nd_key
->nd_sll
, output
->ipv6
.nd
.sll
);
1520 ether_addr_copy(nd_key
->nd_tll
, output
->ipv6
.nd
.tll
);
1527 nla_nest_end(skb
, encap
);
1535 int ovs_nla_put_key(const struct sw_flow_key
*swkey
,
1536 const struct sw_flow_key
*output
, int attr
, bool is_mask
,
1537 struct sk_buff
*skb
)
1542 nla
= nla_nest_start(skb
, attr
);
1545 err
= __ovs_nla_put_key(swkey
, output
, is_mask
, skb
);
1548 nla_nest_end(skb
, nla
);
1553 /* Called with ovs_mutex or RCU read lock. */
1554 int ovs_nla_put_identifier(const struct sw_flow
*flow
, struct sk_buff
*skb
)
1556 if (ovs_identifier_is_ufid(&flow
->id
))
1557 return nla_put(skb
, OVS_FLOW_ATTR_UFID
, flow
->id
.ufid_len
,
1560 return ovs_nla_put_key(flow
->id
.unmasked_key
, flow
->id
.unmasked_key
,
1561 OVS_FLOW_ATTR_KEY
, false, skb
);
1564 /* Called with ovs_mutex or RCU read lock. */
1565 int ovs_nla_put_masked_key(const struct sw_flow
*flow
, struct sk_buff
*skb
)
1567 return ovs_nla_put_key(&flow
->key
, &flow
->key
,
1568 OVS_FLOW_ATTR_KEY
, false, skb
);
1571 /* Called with ovs_mutex or RCU read lock. */
1572 int ovs_nla_put_mask(const struct sw_flow
*flow
, struct sk_buff
*skb
)
1574 return ovs_nla_put_key(&flow
->key
, &flow
->mask
->key
,
1575 OVS_FLOW_ATTR_MASK
, true, skb
);
1578 #define MAX_ACTIONS_BUFSIZE (32 * 1024)
1580 static struct sw_flow_actions
*nla_alloc_flow_actions(int size
, bool log
)
1582 struct sw_flow_actions
*sfa
;
1584 if (size
> MAX_ACTIONS_BUFSIZE
) {
1585 OVS_NLERR(log
, "Flow action size %u bytes exceeds max", size
);
1586 return ERR_PTR(-EINVAL
);
1589 sfa
= kmalloc(sizeof(*sfa
) + size
, GFP_KERNEL
);
1591 return ERR_PTR(-ENOMEM
);
1593 sfa
->actions_len
= 0;
1597 static void ovs_nla_free_set_action(const struct nlattr
*a
)
1599 const struct nlattr
*ovs_key
= nla_data(a
);
1600 struct ovs_tunnel_info
*ovs_tun
;
1602 switch (nla_type(ovs_key
)) {
1603 case OVS_KEY_ATTR_TUNNEL_INFO
:
1604 ovs_tun
= nla_data(ovs_key
);
1605 dst_release((struct dst_entry
*)ovs_tun
->tun_dst
);
1610 void ovs_nla_free_flow_actions(struct sw_flow_actions
*sf_acts
)
1612 const struct nlattr
*a
;
1618 nla_for_each_attr(a
, sf_acts
->actions
, sf_acts
->actions_len
, rem
) {
1619 switch (nla_type(a
)) {
1620 case OVS_ACTION_ATTR_SET
:
1621 ovs_nla_free_set_action(a
);
1623 case OVS_ACTION_ATTR_CT
:
1624 ovs_ct_free_action(a
);
1632 static void __ovs_nla_free_flow_actions(struct rcu_head
*head
)
1634 ovs_nla_free_flow_actions(container_of(head
, struct sw_flow_actions
, rcu
));
1637 /* Schedules 'sf_acts' to be freed after the next RCU grace period.
1638 * The caller must hold rcu_read_lock for this to be sensible. */
1639 void ovs_nla_free_flow_actions_rcu(struct sw_flow_actions
*sf_acts
)
1641 call_rcu(&sf_acts
->rcu
, __ovs_nla_free_flow_actions
);
1644 static struct nlattr
*reserve_sfa_size(struct sw_flow_actions
**sfa
,
1645 int attr_len
, bool log
)
1648 struct sw_flow_actions
*acts
;
1650 int req_size
= NLA_ALIGN(attr_len
);
1651 int next_offset
= offsetof(struct sw_flow_actions
, actions
) +
1652 (*sfa
)->actions_len
;
1654 if (req_size
<= (ksize(*sfa
) - next_offset
))
1657 new_acts_size
= ksize(*sfa
) * 2;
1659 if (new_acts_size
> MAX_ACTIONS_BUFSIZE
) {
1660 if ((MAX_ACTIONS_BUFSIZE
- next_offset
) < req_size
)
1661 return ERR_PTR(-EMSGSIZE
);
1662 new_acts_size
= MAX_ACTIONS_BUFSIZE
;
1665 acts
= nla_alloc_flow_actions(new_acts_size
, log
);
1667 return (void *)acts
;
1669 memcpy(acts
->actions
, (*sfa
)->actions
, (*sfa
)->actions_len
);
1670 acts
->actions_len
= (*sfa
)->actions_len
;
1671 acts
->orig_len
= (*sfa
)->orig_len
;
1676 (*sfa
)->actions_len
+= req_size
;
1677 return (struct nlattr
*) ((unsigned char *)(*sfa
) + next_offset
);
1680 static struct nlattr
*__add_action(struct sw_flow_actions
**sfa
,
1681 int attrtype
, void *data
, int len
, bool log
)
1685 a
= reserve_sfa_size(sfa
, nla_attr_size(len
), log
);
1689 a
->nla_type
= attrtype
;
1690 a
->nla_len
= nla_attr_size(len
);
1693 memcpy(nla_data(a
), data
, len
);
1694 memset((unsigned char *) a
+ a
->nla_len
, 0, nla_padlen(len
));
1699 int ovs_nla_add_action(struct sw_flow_actions
**sfa
, int attrtype
, void *data
,
1704 a
= __add_action(sfa
, attrtype
, data
, len
, log
);
1706 return PTR_ERR_OR_ZERO(a
);
1709 static inline int add_nested_action_start(struct sw_flow_actions
**sfa
,
1710 int attrtype
, bool log
)
1712 int used
= (*sfa
)->actions_len
;
1715 err
= ovs_nla_add_action(sfa
, attrtype
, NULL
, 0, log
);
1722 static inline void add_nested_action_end(struct sw_flow_actions
*sfa
,
1725 struct nlattr
*a
= (struct nlattr
*) ((unsigned char *)sfa
->actions
+
1728 a
->nla_len
= sfa
->actions_len
- st_offset
;
1731 static int __ovs_nla_copy_actions(struct net
*net
, const struct nlattr
*attr
,
1732 const struct sw_flow_key
*key
,
1733 int depth
, struct sw_flow_actions
**sfa
,
1734 __be16 eth_type
, __be16 vlan_tci
, bool log
);
1736 static int validate_and_copy_sample(struct net
*net
, const struct nlattr
*attr
,
1737 const struct sw_flow_key
*key
, int depth
,
1738 struct sw_flow_actions
**sfa
,
1739 __be16 eth_type
, __be16 vlan_tci
, bool log
)
1741 const struct nlattr
*attrs
[OVS_SAMPLE_ATTR_MAX
+ 1];
1742 const struct nlattr
*probability
, *actions
;
1743 const struct nlattr
*a
;
1744 int rem
, start
, err
, st_acts
;
1746 memset(attrs
, 0, sizeof(attrs
));
1747 nla_for_each_nested(a
, attr
, rem
) {
1748 int type
= nla_type(a
);
1749 if (!type
|| type
> OVS_SAMPLE_ATTR_MAX
|| attrs
[type
])
1756 probability
= attrs
[OVS_SAMPLE_ATTR_PROBABILITY
];
1757 if (!probability
|| nla_len(probability
) != sizeof(u32
))
1760 actions
= attrs
[OVS_SAMPLE_ATTR_ACTIONS
];
1761 if (!actions
|| (nla_len(actions
) && nla_len(actions
) < NLA_HDRLEN
))
1764 /* validation done, copy sample action. */
1765 start
= add_nested_action_start(sfa
, OVS_ACTION_ATTR_SAMPLE
, log
);
1768 err
= ovs_nla_add_action(sfa
, OVS_SAMPLE_ATTR_PROBABILITY
,
1769 nla_data(probability
), sizeof(u32
), log
);
1772 st_acts
= add_nested_action_start(sfa
, OVS_SAMPLE_ATTR_ACTIONS
, log
);
1776 err
= __ovs_nla_copy_actions(net
, actions
, key
, depth
+ 1, sfa
,
1777 eth_type
, vlan_tci
, log
);
1781 add_nested_action_end(*sfa
, st_acts
);
1782 add_nested_action_end(*sfa
, start
);
1787 void ovs_match_init(struct sw_flow_match
*match
,
1788 struct sw_flow_key
*key
,
1789 struct sw_flow_mask
*mask
)
1791 memset(match
, 0, sizeof(*match
));
1795 memset(key
, 0, sizeof(*key
));
1798 memset(&mask
->key
, 0, sizeof(mask
->key
));
1799 mask
->range
.start
= mask
->range
.end
= 0;
1803 static int validate_geneve_opts(struct sw_flow_key
*key
)
1805 struct geneve_opt
*option
;
1806 int opts_len
= key
->tun_opts_len
;
1807 bool crit_opt
= false;
1809 option
= (struct geneve_opt
*)TUN_METADATA_OPTS(key
, key
->tun_opts_len
);
1810 while (opts_len
> 0) {
1813 if (opts_len
< sizeof(*option
))
1816 len
= sizeof(*option
) + option
->length
* 4;
1820 crit_opt
|= !!(option
->type
& GENEVE_CRIT_OPT_TYPE
);
1822 option
= (struct geneve_opt
*)((u8
*)option
+ len
);
1826 key
->tun_key
.tun_flags
|= crit_opt
? TUNNEL_CRIT_OPT
: 0;
1831 static int validate_and_copy_set_tun(const struct nlattr
*attr
,
1832 struct sw_flow_actions
**sfa
, bool log
)
1834 struct sw_flow_match match
;
1835 struct sw_flow_key key
;
1836 struct metadata_dst
*tun_dst
;
1837 struct ip_tunnel_info
*tun_info
;
1838 struct ovs_tunnel_info
*ovs_tun
;
1840 int err
= 0, start
, opts_type
;
1842 ovs_match_init(&match
, &key
, NULL
);
1843 opts_type
= ipv4_tun_from_nlattr(nla_data(attr
), &match
, false, log
);
1847 if (key
.tun_opts_len
) {
1848 switch (opts_type
) {
1849 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS
:
1850 err
= validate_geneve_opts(&key
);
1854 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS
:
1859 start
= add_nested_action_start(sfa
, OVS_ACTION_ATTR_SET
, log
);
1863 tun_dst
= metadata_dst_alloc(key
.tun_opts_len
, GFP_KERNEL
);
1867 a
= __add_action(sfa
, OVS_KEY_ATTR_TUNNEL_INFO
, NULL
,
1868 sizeof(*ovs_tun
), log
);
1870 dst_release((struct dst_entry
*)tun_dst
);
1874 ovs_tun
= nla_data(a
);
1875 ovs_tun
->tun_dst
= tun_dst
;
1877 tun_info
= &tun_dst
->u
.tun_info
;
1878 tun_info
->mode
= IP_TUNNEL_INFO_TX
;
1879 tun_info
->key
= key
.tun_key
;
1881 /* We need to store the options in the action itself since
1882 * everything else will go away after flow setup. We can append
1883 * it to tun_info and then point there.
1885 ip_tunnel_info_opts_set(tun_info
,
1886 TUN_METADATA_OPTS(&key
, key
.tun_opts_len
),
1888 add_nested_action_end(*sfa
, start
);
1893 /* Return false if there are any non-masked bits set.
1894 * Mask follows data immediately, before any netlink padding.
1896 static bool validate_masked(u8
*data
, int len
)
1898 u8
*mask
= data
+ len
;
1901 if (*data
++ & ~*mask
++)
1907 static int validate_set(const struct nlattr
*a
,
1908 const struct sw_flow_key
*flow_key
,
1909 struct sw_flow_actions
**sfa
,
1910 bool *skip_copy
, __be16 eth_type
, bool masked
, bool log
)
1912 const struct nlattr
*ovs_key
= nla_data(a
);
1913 int key_type
= nla_type(ovs_key
);
1916 /* There can be only one key in a action */
1917 if (nla_total_size(nla_len(ovs_key
)) != nla_len(a
))
1920 key_len
= nla_len(ovs_key
);
1924 if (key_type
> OVS_KEY_ATTR_MAX
||
1925 (ovs_key_lens
[key_type
].len
!= key_len
&&
1926 ovs_key_lens
[key_type
].len
!= OVS_ATTR_NESTED
))
1929 if (masked
&& !validate_masked(nla_data(ovs_key
), key_len
))
1933 const struct ovs_key_ipv4
*ipv4_key
;
1934 const struct ovs_key_ipv6
*ipv6_key
;
1937 case OVS_KEY_ATTR_PRIORITY
:
1938 case OVS_KEY_ATTR_SKB_MARK
:
1939 case OVS_KEY_ATTR_CT_MARK
:
1940 case OVS_KEY_ATTR_CT_LABEL
:
1941 case OVS_KEY_ATTR_ETHERNET
:
1944 case OVS_KEY_ATTR_TUNNEL
:
1945 if (eth_p_mpls(eth_type
))
1949 return -EINVAL
; /* Masked tunnel set not supported. */
1952 err
= validate_and_copy_set_tun(a
, sfa
, log
);
1957 case OVS_KEY_ATTR_IPV4
:
1958 if (eth_type
!= htons(ETH_P_IP
))
1961 ipv4_key
= nla_data(ovs_key
);
1964 const struct ovs_key_ipv4
*mask
= ipv4_key
+ 1;
1966 /* Non-writeable fields. */
1967 if (mask
->ipv4_proto
|| mask
->ipv4_frag
)
1970 if (ipv4_key
->ipv4_proto
!= flow_key
->ip
.proto
)
1973 if (ipv4_key
->ipv4_frag
!= flow_key
->ip
.frag
)
1978 case OVS_KEY_ATTR_IPV6
:
1979 if (eth_type
!= htons(ETH_P_IPV6
))
1982 ipv6_key
= nla_data(ovs_key
);
1985 const struct ovs_key_ipv6
*mask
= ipv6_key
+ 1;
1987 /* Non-writeable fields. */
1988 if (mask
->ipv6_proto
|| mask
->ipv6_frag
)
1991 /* Invalid bits in the flow label mask? */
1992 if (ntohl(mask
->ipv6_label
) & 0xFFF00000)
1995 if (ipv6_key
->ipv6_proto
!= flow_key
->ip
.proto
)
1998 if (ipv6_key
->ipv6_frag
!= flow_key
->ip
.frag
)
2001 if (ntohl(ipv6_key
->ipv6_label
) & 0xFFF00000)
2006 case OVS_KEY_ATTR_TCP
:
2007 if ((eth_type
!= htons(ETH_P_IP
) &&
2008 eth_type
!= htons(ETH_P_IPV6
)) ||
2009 flow_key
->ip
.proto
!= IPPROTO_TCP
)
2014 case OVS_KEY_ATTR_UDP
:
2015 if ((eth_type
!= htons(ETH_P_IP
) &&
2016 eth_type
!= htons(ETH_P_IPV6
)) ||
2017 flow_key
->ip
.proto
!= IPPROTO_UDP
)
2022 case OVS_KEY_ATTR_MPLS
:
2023 if (!eth_p_mpls(eth_type
))
2027 case OVS_KEY_ATTR_SCTP
:
2028 if ((eth_type
!= htons(ETH_P_IP
) &&
2029 eth_type
!= htons(ETH_P_IPV6
)) ||
2030 flow_key
->ip
.proto
!= IPPROTO_SCTP
)
2039 /* Convert non-masked non-tunnel set actions to masked set actions. */
2040 if (!masked
&& key_type
!= OVS_KEY_ATTR_TUNNEL
) {
2041 int start
, len
= key_len
* 2;
2046 start
= add_nested_action_start(sfa
,
2047 OVS_ACTION_ATTR_SET_TO_MASKED
,
2052 at
= __add_action(sfa
, key_type
, NULL
, len
, log
);
2056 memcpy(nla_data(at
), nla_data(ovs_key
), key_len
); /* Key. */
2057 memset(nla_data(at
) + key_len
, 0xff, key_len
); /* Mask. */
2058 /* Clear non-writeable bits from otherwise writeable fields. */
2059 if (key_type
== OVS_KEY_ATTR_IPV6
) {
2060 struct ovs_key_ipv6
*mask
= nla_data(at
) + key_len
;
2062 mask
->ipv6_label
&= htonl(0x000FFFFF);
2064 add_nested_action_end(*sfa
, start
);
2070 static int validate_userspace(const struct nlattr
*attr
)
2072 static const struct nla_policy userspace_policy
[OVS_USERSPACE_ATTR_MAX
+ 1] = {
2073 [OVS_USERSPACE_ATTR_PID
] = {.type
= NLA_U32
},
2074 [OVS_USERSPACE_ATTR_USERDATA
] = {.type
= NLA_UNSPEC
},
2075 [OVS_USERSPACE_ATTR_EGRESS_TUN_PORT
] = {.type
= NLA_U32
},
2077 struct nlattr
*a
[OVS_USERSPACE_ATTR_MAX
+ 1];
2080 error
= nla_parse_nested(a
, OVS_USERSPACE_ATTR_MAX
,
2081 attr
, userspace_policy
);
2085 if (!a
[OVS_USERSPACE_ATTR_PID
] ||
2086 !nla_get_u32(a
[OVS_USERSPACE_ATTR_PID
]))
2092 static int copy_action(const struct nlattr
*from
,
2093 struct sw_flow_actions
**sfa
, bool log
)
2095 int totlen
= NLA_ALIGN(from
->nla_len
);
2098 to
= reserve_sfa_size(sfa
, from
->nla_len
, log
);
2102 memcpy(to
, from
, totlen
);
2106 static int __ovs_nla_copy_actions(struct net
*net
, const struct nlattr
*attr
,
2107 const struct sw_flow_key
*key
,
2108 int depth
, struct sw_flow_actions
**sfa
,
2109 __be16 eth_type
, __be16 vlan_tci
, bool log
)
2111 const struct nlattr
*a
;
2114 if (depth
>= SAMPLE_ACTION_DEPTH
)
2117 nla_for_each_nested(a
, attr
, rem
) {
2118 /* Expected argument lengths, (u32)-1 for variable length. */
2119 static const u32 action_lens
[OVS_ACTION_ATTR_MAX
+ 1] = {
2120 [OVS_ACTION_ATTR_OUTPUT
] = sizeof(u32
),
2121 [OVS_ACTION_ATTR_RECIRC
] = sizeof(u32
),
2122 [OVS_ACTION_ATTR_USERSPACE
] = (u32
)-1,
2123 [OVS_ACTION_ATTR_PUSH_MPLS
] = sizeof(struct ovs_action_push_mpls
),
2124 [OVS_ACTION_ATTR_POP_MPLS
] = sizeof(__be16
),
2125 [OVS_ACTION_ATTR_PUSH_VLAN
] = sizeof(struct ovs_action_push_vlan
),
2126 [OVS_ACTION_ATTR_POP_VLAN
] = 0,
2127 [OVS_ACTION_ATTR_SET
] = (u32
)-1,
2128 [OVS_ACTION_ATTR_SET_MASKED
] = (u32
)-1,
2129 [OVS_ACTION_ATTR_SAMPLE
] = (u32
)-1,
2130 [OVS_ACTION_ATTR_HASH
] = sizeof(struct ovs_action_hash
),
2131 [OVS_ACTION_ATTR_CT
] = (u32
)-1,
2133 const struct ovs_action_push_vlan
*vlan
;
2134 int type
= nla_type(a
);
2137 if (type
> OVS_ACTION_ATTR_MAX
||
2138 (action_lens
[type
] != nla_len(a
) &&
2139 action_lens
[type
] != (u32
)-1))
2144 case OVS_ACTION_ATTR_UNSPEC
:
2147 case OVS_ACTION_ATTR_USERSPACE
:
2148 err
= validate_userspace(a
);
2153 case OVS_ACTION_ATTR_OUTPUT
:
2154 if (nla_get_u32(a
) >= DP_MAX_PORTS
)
2158 case OVS_ACTION_ATTR_HASH
: {
2159 const struct ovs_action_hash
*act_hash
= nla_data(a
);
2161 switch (act_hash
->hash_alg
) {
2162 case OVS_HASH_ALG_L4
:
2171 case OVS_ACTION_ATTR_POP_VLAN
:
2172 vlan_tci
= htons(0);
2175 case OVS_ACTION_ATTR_PUSH_VLAN
:
2177 if (vlan
->vlan_tpid
!= htons(ETH_P_8021Q
))
2179 if (!(vlan
->vlan_tci
& htons(VLAN_TAG_PRESENT
)))
2181 vlan_tci
= vlan
->vlan_tci
;
2184 case OVS_ACTION_ATTR_RECIRC
:
2187 case OVS_ACTION_ATTR_PUSH_MPLS
: {
2188 const struct ovs_action_push_mpls
*mpls
= nla_data(a
);
2190 if (!eth_p_mpls(mpls
->mpls_ethertype
))
2192 /* Prohibit push MPLS other than to a white list
2193 * for packets that have a known tag order.
2195 if (vlan_tci
& htons(VLAN_TAG_PRESENT
) ||
2196 (eth_type
!= htons(ETH_P_IP
) &&
2197 eth_type
!= htons(ETH_P_IPV6
) &&
2198 eth_type
!= htons(ETH_P_ARP
) &&
2199 eth_type
!= htons(ETH_P_RARP
) &&
2200 !eth_p_mpls(eth_type
)))
2202 eth_type
= mpls
->mpls_ethertype
;
2206 case OVS_ACTION_ATTR_POP_MPLS
:
2207 if (vlan_tci
& htons(VLAN_TAG_PRESENT
) ||
2208 !eth_p_mpls(eth_type
))
2211 /* Disallow subsequent L2.5+ set and mpls_pop actions
2212 * as there is no check here to ensure that the new
2213 * eth_type is valid and thus set actions could
2214 * write off the end of the packet or otherwise
2217 * Support for these actions is planned using packet
2220 eth_type
= htons(0);
2223 case OVS_ACTION_ATTR_SET
:
2224 err
= validate_set(a
, key
, sfa
,
2225 &skip_copy
, eth_type
, false, log
);
2230 case OVS_ACTION_ATTR_SET_MASKED
:
2231 err
= validate_set(a
, key
, sfa
,
2232 &skip_copy
, eth_type
, true, log
);
2237 case OVS_ACTION_ATTR_SAMPLE
:
2238 err
= validate_and_copy_sample(net
, a
, key
, depth
, sfa
,
2239 eth_type
, vlan_tci
, log
);
2245 case OVS_ACTION_ATTR_CT
:
2246 err
= ovs_ct_copy_action(net
, a
, key
, sfa
, log
);
2253 OVS_NLERR(log
, "Unknown Action type %d", type
);
2257 err
= copy_action(a
, sfa
, log
);
2269 /* 'key' must be the masked key. */
2270 int ovs_nla_copy_actions(struct net
*net
, const struct nlattr
*attr
,
2271 const struct sw_flow_key
*key
,
2272 struct sw_flow_actions
**sfa
, bool log
)
2276 *sfa
= nla_alloc_flow_actions(nla_len(attr
), log
);
2278 return PTR_ERR(*sfa
);
2280 (*sfa
)->orig_len
= nla_len(attr
);
2281 err
= __ovs_nla_copy_actions(net
, attr
, key
, 0, sfa
, key
->eth
.type
,
2284 ovs_nla_free_flow_actions(*sfa
);
2289 static int sample_action_to_attr(const struct nlattr
*attr
, struct sk_buff
*skb
)
2291 const struct nlattr
*a
;
2292 struct nlattr
*start
;
2295 start
= nla_nest_start(skb
, OVS_ACTION_ATTR_SAMPLE
);
2299 nla_for_each_nested(a
, attr
, rem
) {
2300 int type
= nla_type(a
);
2301 struct nlattr
*st_sample
;
2304 case OVS_SAMPLE_ATTR_PROBABILITY
:
2305 if (nla_put(skb
, OVS_SAMPLE_ATTR_PROBABILITY
,
2306 sizeof(u32
), nla_data(a
)))
2309 case OVS_SAMPLE_ATTR_ACTIONS
:
2310 st_sample
= nla_nest_start(skb
, OVS_SAMPLE_ATTR_ACTIONS
);
2313 err
= ovs_nla_put_actions(nla_data(a
), nla_len(a
), skb
);
2316 nla_nest_end(skb
, st_sample
);
2321 nla_nest_end(skb
, start
);
2325 static int set_action_to_attr(const struct nlattr
*a
, struct sk_buff
*skb
)
2327 const struct nlattr
*ovs_key
= nla_data(a
);
2328 int key_type
= nla_type(ovs_key
);
2329 struct nlattr
*start
;
2333 case OVS_KEY_ATTR_TUNNEL_INFO
: {
2334 struct ovs_tunnel_info
*ovs_tun
= nla_data(ovs_key
);
2335 struct ip_tunnel_info
*tun_info
= &ovs_tun
->tun_dst
->u
.tun_info
;
2337 start
= nla_nest_start(skb
, OVS_ACTION_ATTR_SET
);
2341 err
= ipv4_tun_to_nlattr(skb
, &tun_info
->key
,
2342 tun_info
->options_len
?
2343 ip_tunnel_info_opts(tun_info
) : NULL
,
2344 tun_info
->options_len
);
2347 nla_nest_end(skb
, start
);
2351 if (nla_put(skb
, OVS_ACTION_ATTR_SET
, nla_len(a
), ovs_key
))
2359 static int masked_set_action_to_set_action_attr(const struct nlattr
*a
,
2360 struct sk_buff
*skb
)
2362 const struct nlattr
*ovs_key
= nla_data(a
);
2364 size_t key_len
= nla_len(ovs_key
) / 2;
2366 /* Revert the conversion we did from a non-masked set action to
2367 * masked set action.
2369 nla
= nla_nest_start(skb
, OVS_ACTION_ATTR_SET
);
2373 if (nla_put(skb
, nla_type(ovs_key
), key_len
, nla_data(ovs_key
)))
2376 nla_nest_end(skb
, nla
);
2380 int ovs_nla_put_actions(const struct nlattr
*attr
, int len
, struct sk_buff
*skb
)
2382 const struct nlattr
*a
;
2385 nla_for_each_attr(a
, attr
, len
, rem
) {
2386 int type
= nla_type(a
);
2389 case OVS_ACTION_ATTR_SET
:
2390 err
= set_action_to_attr(a
, skb
);
2395 case OVS_ACTION_ATTR_SET_TO_MASKED
:
2396 err
= masked_set_action_to_set_action_attr(a
, skb
);
2401 case OVS_ACTION_ATTR_SAMPLE
:
2402 err
= sample_action_to_attr(a
, skb
);
2407 case OVS_ACTION_ATTR_CT
:
2408 err
= ovs_ct_action_to_attr(nla_data(a
), skb
);
2414 if (nla_put(skb
, type
, nla_len(a
), nla_data(a
)))