2 * Copyright (c) 2007-2013 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>
46 #include <net/ip_tunnels.h>
48 #include <net/ndisc.h>
50 #include "flow_netlink.h"
52 static void update_range__(struct sw_flow_match *match,
53 size_t offset, size_t size, bool is_mask)
55 struct sw_flow_key_range *range = NULL;
56 size_t start = rounddown(offset, sizeof(long));
57 size_t end = roundup(offset + size, sizeof(long));
60 range = &match->range;
62 range = &match->mask->range;
67 if (range->start == range->end) {
73 if (range->start > start)
80 #define SW_FLOW_KEY_PUT(match, field, value, is_mask) \
82 update_range__(match, offsetof(struct sw_flow_key, field), \
83 sizeof((match)->key->field), is_mask); \
86 (match)->mask->key.field = value; \
88 (match)->key->field = value; \
92 #define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \
94 update_range__(match, offsetof(struct sw_flow_key, field), \
98 memcpy(&(match)->mask->key.field, value_p, len);\
100 memcpy(&(match)->key->field, value_p, len); \
104 static u16 range_n_bytes(const struct sw_flow_key_range *range)
106 return range->end - range->start;
109 static bool match_validate(const struct sw_flow_match *match,
110 u64 key_attrs, u64 mask_attrs)
112 u64 key_expected = 1ULL << OVS_KEY_ATTR_ETHERNET;
113 u64 mask_allowed = key_attrs; /* At most allow all key attributes */
115 /* The following mask attributes allowed only if they
116 * pass the validation tests. */
117 mask_allowed &= ~((1ULL << OVS_KEY_ATTR_IPV4)
118 | (1ULL << OVS_KEY_ATTR_IPV6)
119 | (1ULL << OVS_KEY_ATTR_TCP)
120 | (1ULL << OVS_KEY_ATTR_TCP_FLAGS)
121 | (1ULL << OVS_KEY_ATTR_UDP)
122 | (1ULL << OVS_KEY_ATTR_SCTP)
123 | (1ULL << OVS_KEY_ATTR_ICMP)
124 | (1ULL << OVS_KEY_ATTR_ICMPV6)
125 | (1ULL << OVS_KEY_ATTR_ARP)
126 | (1ULL << OVS_KEY_ATTR_ND));
128 /* Always allowed mask fields. */
129 mask_allowed |= ((1ULL << OVS_KEY_ATTR_TUNNEL)
130 | (1ULL << OVS_KEY_ATTR_IN_PORT)
131 | (1ULL << OVS_KEY_ATTR_ETHERTYPE));
133 /* Check key attributes. */
134 if (match->key->eth.type == htons(ETH_P_ARP)
135 || match->key->eth.type == htons(ETH_P_RARP)) {
136 key_expected |= 1ULL << OVS_KEY_ATTR_ARP;
137 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
138 mask_allowed |= 1ULL << OVS_KEY_ATTR_ARP;
141 if (match->key->eth.type == htons(ETH_P_IP)) {
142 key_expected |= 1ULL << OVS_KEY_ATTR_IPV4;
143 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
144 mask_allowed |= 1ULL << OVS_KEY_ATTR_IPV4;
146 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
147 if (match->key->ip.proto == IPPROTO_UDP) {
148 key_expected |= 1ULL << OVS_KEY_ATTR_UDP;
149 if (match->mask && (match->mask->key.ip.proto == 0xff))
150 mask_allowed |= 1ULL << OVS_KEY_ATTR_UDP;
153 if (match->key->ip.proto == IPPROTO_SCTP) {
154 key_expected |= 1ULL << OVS_KEY_ATTR_SCTP;
155 if (match->mask && (match->mask->key.ip.proto == 0xff))
156 mask_allowed |= 1ULL << OVS_KEY_ATTR_SCTP;
159 if (match->key->ip.proto == IPPROTO_TCP) {
160 key_expected |= 1ULL << OVS_KEY_ATTR_TCP;
161 key_expected |= 1ULL << OVS_KEY_ATTR_TCP_FLAGS;
162 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
163 mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP;
164 mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP_FLAGS;
168 if (match->key->ip.proto == IPPROTO_ICMP) {
169 key_expected |= 1ULL << OVS_KEY_ATTR_ICMP;
170 if (match->mask && (match->mask->key.ip.proto == 0xff))
171 mask_allowed |= 1ULL << OVS_KEY_ATTR_ICMP;
176 if (match->key->eth.type == htons(ETH_P_IPV6)) {
177 key_expected |= 1ULL << OVS_KEY_ATTR_IPV6;
178 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
179 mask_allowed |= 1ULL << OVS_KEY_ATTR_IPV6;
181 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
182 if (match->key->ip.proto == IPPROTO_UDP) {
183 key_expected |= 1ULL << OVS_KEY_ATTR_UDP;
184 if (match->mask && (match->mask->key.ip.proto == 0xff))
185 mask_allowed |= 1ULL << OVS_KEY_ATTR_UDP;
188 if (match->key->ip.proto == IPPROTO_SCTP) {
189 key_expected |= 1ULL << OVS_KEY_ATTR_SCTP;
190 if (match->mask && (match->mask->key.ip.proto == 0xff))
191 mask_allowed |= 1ULL << OVS_KEY_ATTR_SCTP;
194 if (match->key->ip.proto == IPPROTO_TCP) {
195 key_expected |= 1ULL << OVS_KEY_ATTR_TCP;
196 key_expected |= 1ULL << OVS_KEY_ATTR_TCP_FLAGS;
197 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
198 mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP;
199 mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP_FLAGS;
203 if (match->key->ip.proto == IPPROTO_ICMPV6) {
204 key_expected |= 1ULL << OVS_KEY_ATTR_ICMPV6;
205 if (match->mask && (match->mask->key.ip.proto == 0xff))
206 mask_allowed |= 1ULL << OVS_KEY_ATTR_ICMPV6;
208 if (match->key->tp.src ==
209 htons(NDISC_NEIGHBOUR_SOLICITATION) ||
210 match->key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) {
211 key_expected |= 1ULL << OVS_KEY_ATTR_ND;
212 if (match->mask && (match->mask->key.tp.src == htons(0xffff)))
213 mask_allowed |= 1ULL << OVS_KEY_ATTR_ND;
219 if ((key_attrs & key_expected) != key_expected) {
220 /* Key attributes check failed. */
221 OVS_NLERR("Missing expected key attributes (key_attrs=%llx, expected=%llx).\n",
222 (unsigned long long)key_attrs, (unsigned long long)key_expected);
226 if ((mask_attrs & mask_allowed) != mask_attrs) {
227 /* Mask attributes check failed. */
228 OVS_NLERR("Contain more than allowed mask fields (mask_attrs=%llx, mask_allowed=%llx).\n",
229 (unsigned long long)mask_attrs, (unsigned long long)mask_allowed);
236 /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */
237 static const int ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = {
238 [OVS_KEY_ATTR_ENCAP] = -1,
239 [OVS_KEY_ATTR_PRIORITY] = sizeof(u32),
240 [OVS_KEY_ATTR_IN_PORT] = sizeof(u32),
241 [OVS_KEY_ATTR_SKB_MARK] = sizeof(u32),
242 [OVS_KEY_ATTR_ETHERNET] = sizeof(struct ovs_key_ethernet),
243 [OVS_KEY_ATTR_VLAN] = sizeof(__be16),
244 [OVS_KEY_ATTR_ETHERTYPE] = sizeof(__be16),
245 [OVS_KEY_ATTR_IPV4] = sizeof(struct ovs_key_ipv4),
246 [OVS_KEY_ATTR_IPV6] = sizeof(struct ovs_key_ipv6),
247 [OVS_KEY_ATTR_TCP] = sizeof(struct ovs_key_tcp),
248 [OVS_KEY_ATTR_TCP_FLAGS] = sizeof(__be16),
249 [OVS_KEY_ATTR_UDP] = sizeof(struct ovs_key_udp),
250 [OVS_KEY_ATTR_SCTP] = sizeof(struct ovs_key_sctp),
251 [OVS_KEY_ATTR_ICMP] = sizeof(struct ovs_key_icmp),
252 [OVS_KEY_ATTR_ICMPV6] = sizeof(struct ovs_key_icmpv6),
253 [OVS_KEY_ATTR_ARP] = sizeof(struct ovs_key_arp),
254 [OVS_KEY_ATTR_ND] = sizeof(struct ovs_key_nd),
255 [OVS_KEY_ATTR_DP_HASH] = sizeof(u32),
256 [OVS_KEY_ATTR_RECIRC_ID] = sizeof(u32),
257 [OVS_KEY_ATTR_TUNNEL] = -1,
260 static bool is_all_zero(const u8 *fp, size_t size)
267 for (i = 0; i < size; i++)
274 static int __parse_flow_nlattrs(const struct nlattr *attr,
275 const struct nlattr *a[],
276 u64 *attrsp, bool nz)
278 const struct nlattr *nla;
283 nla_for_each_nested(nla, attr, rem) {
284 u16 type = nla_type(nla);
287 if (type > OVS_KEY_ATTR_MAX) {
288 OVS_NLERR("Unknown key attribute (type=%d, max=%d).\n",
289 type, OVS_KEY_ATTR_MAX);
293 if (attrs & (1ULL << type)) {
294 OVS_NLERR("Duplicate key attribute (type %d).\n", type);
298 expected_len = ovs_key_lens[type];
299 if (nla_len(nla) != expected_len && expected_len != -1) {
300 OVS_NLERR("Key attribute has unexpected length (type=%d"
301 ", length=%d, expected=%d).\n", type,
302 nla_len(nla), expected_len);
306 if (!nz || !is_all_zero(nla_data(nla), expected_len)) {
307 attrs |= 1ULL << type;
312 OVS_NLERR("Message has %d unknown bytes.\n", rem);
320 static int parse_flow_mask_nlattrs(const struct nlattr *attr,
321 const struct nlattr *a[], u64 *attrsp)
323 return __parse_flow_nlattrs(attr, a, attrsp, true);
326 static int parse_flow_nlattrs(const struct nlattr *attr,
327 const struct nlattr *a[], u64 *attrsp)
329 return __parse_flow_nlattrs(attr, a, attrsp, false);
332 static int ipv4_tun_from_nlattr(const struct nlattr *attr,
333 struct sw_flow_match *match, bool is_mask)
338 __be16 tun_flags = 0;
340 nla_for_each_nested(a, attr, rem) {
341 int type = nla_type(a);
342 static const u32 ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = {
343 [OVS_TUNNEL_KEY_ATTR_ID] = sizeof(u64),
344 [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = sizeof(u32),
345 [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = sizeof(u32),
346 [OVS_TUNNEL_KEY_ATTR_TOS] = 1,
347 [OVS_TUNNEL_KEY_ATTR_TTL] = 1,
348 [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = 0,
349 [OVS_TUNNEL_KEY_ATTR_CSUM] = 0,
350 [OVS_TUNNEL_KEY_ATTR_OAM] = 0,
353 if (type > OVS_TUNNEL_KEY_ATTR_MAX) {
354 OVS_NLERR("Unknown IPv4 tunnel attribute (type=%d, max=%d).\n",
355 type, OVS_TUNNEL_KEY_ATTR_MAX);
359 if (ovs_tunnel_key_lens[type] != nla_len(a)) {
360 OVS_NLERR("IPv4 tunnel attribute type has unexpected "
361 " length (type=%d, length=%d, expected=%d).\n",
362 type, nla_len(a), ovs_tunnel_key_lens[type]);
367 case OVS_TUNNEL_KEY_ATTR_ID:
368 SW_FLOW_KEY_PUT(match, tun_key.tun_id,
369 nla_get_be64(a), is_mask);
370 tun_flags |= TUNNEL_KEY;
372 case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
373 SW_FLOW_KEY_PUT(match, tun_key.ipv4_src,
374 nla_get_be32(a), is_mask);
376 case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
377 SW_FLOW_KEY_PUT(match, tun_key.ipv4_dst,
378 nla_get_be32(a), is_mask);
380 case OVS_TUNNEL_KEY_ATTR_TOS:
381 SW_FLOW_KEY_PUT(match, tun_key.ipv4_tos,
382 nla_get_u8(a), is_mask);
384 case OVS_TUNNEL_KEY_ATTR_TTL:
385 SW_FLOW_KEY_PUT(match, tun_key.ipv4_ttl,
386 nla_get_u8(a), is_mask);
389 case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
390 tun_flags |= TUNNEL_DONT_FRAGMENT;
392 case OVS_TUNNEL_KEY_ATTR_CSUM:
393 tun_flags |= TUNNEL_CSUM;
395 case OVS_TUNNEL_KEY_ATTR_OAM:
396 tun_flags |= TUNNEL_OAM;
403 SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask);
406 OVS_NLERR("IPv4 tunnel attribute has %d unknown bytes.\n", rem);
411 if (!match->key->tun_key.ipv4_dst) {
412 OVS_NLERR("IPv4 tunnel destination address is zero.\n");
417 OVS_NLERR("IPv4 tunnel TTL not specified.\n");
425 static int ipv4_tun_to_nlattr(struct sk_buff *skb,
426 const struct ovs_key_ipv4_tunnel *tun_key,
427 const struct ovs_key_ipv4_tunnel *output)
431 nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL);
435 if (output->tun_flags & TUNNEL_KEY &&
436 nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id))
438 if (output->ipv4_src &&
439 nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, output->ipv4_src))
441 if (output->ipv4_dst &&
442 nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST, output->ipv4_dst))
444 if (output->ipv4_tos &&
445 nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->ipv4_tos))
447 if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ipv4_ttl))
449 if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) &&
450 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT))
452 if ((output->tun_flags & TUNNEL_CSUM) &&
453 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM))
455 if ((output->tun_flags & TUNNEL_OAM) &&
456 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM))
459 nla_nest_end(skb, nla);
464 static int metadata_from_nlattrs(struct sw_flow_match *match, u64 *attrs,
465 const struct nlattr **a, bool is_mask)
467 if (*attrs & (1ULL << OVS_KEY_ATTR_DP_HASH)) {
468 u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]);
470 SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask);
471 *attrs &= ~(1ULL << OVS_KEY_ATTR_DP_HASH);
474 if (*attrs & (1ULL << OVS_KEY_ATTR_RECIRC_ID)) {
475 u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]);
477 SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask);
478 *attrs &= ~(1ULL << OVS_KEY_ATTR_RECIRC_ID);
481 if (*attrs & (1ULL << OVS_KEY_ATTR_PRIORITY)) {
482 SW_FLOW_KEY_PUT(match, phy.priority,
483 nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask);
484 *attrs &= ~(1ULL << OVS_KEY_ATTR_PRIORITY);
487 if (*attrs & (1ULL << OVS_KEY_ATTR_IN_PORT)) {
488 u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]);
491 in_port = 0xffffffff; /* Always exact match in_port. */
492 else if (in_port >= DP_MAX_PORTS)
495 SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask);
496 *attrs &= ~(1ULL << OVS_KEY_ATTR_IN_PORT);
497 } else if (!is_mask) {
498 SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask);
501 if (*attrs & (1ULL << OVS_KEY_ATTR_SKB_MARK)) {
502 uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]);
504 SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask);
505 *attrs &= ~(1ULL << OVS_KEY_ATTR_SKB_MARK);
507 if (*attrs & (1ULL << OVS_KEY_ATTR_TUNNEL)) {
508 if (ipv4_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match,
511 *attrs &= ~(1ULL << OVS_KEY_ATTR_TUNNEL);
516 static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs,
517 const struct nlattr **a, bool is_mask)
520 u64 orig_attrs = attrs;
522 err = metadata_from_nlattrs(match, &attrs, a, is_mask);
526 if (attrs & (1ULL << OVS_KEY_ATTR_ETHERNET)) {
527 const struct ovs_key_ethernet *eth_key;
529 eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]);
530 SW_FLOW_KEY_MEMCPY(match, eth.src,
531 eth_key->eth_src, ETH_ALEN, is_mask);
532 SW_FLOW_KEY_MEMCPY(match, eth.dst,
533 eth_key->eth_dst, ETH_ALEN, is_mask);
534 attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERNET);
537 if (attrs & (1ULL << OVS_KEY_ATTR_VLAN)) {
540 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
541 if (!(tci & htons(VLAN_TAG_PRESENT))) {
543 OVS_NLERR("VLAN TCI mask does not have exact match for VLAN_TAG_PRESENT bit.\n");
545 OVS_NLERR("VLAN TCI does not have VLAN_TAG_PRESENT bit set.\n");
550 SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask);
551 attrs &= ~(1ULL << OVS_KEY_ATTR_VLAN);
553 SW_FLOW_KEY_PUT(match, eth.tci, htons(0xffff), true);
555 if (attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)) {
558 eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
560 /* Always exact match EtherType. */
561 eth_type = htons(0xffff);
562 } else if (ntohs(eth_type) < ETH_P_802_3_MIN) {
563 OVS_NLERR("EtherType is less than minimum (type=%x, min=%x).\n",
564 ntohs(eth_type), ETH_P_802_3_MIN);
568 SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask);
569 attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE);
570 } else if (!is_mask) {
571 SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask);
574 if (attrs & (1ULL << OVS_KEY_ATTR_IPV4)) {
575 const struct ovs_key_ipv4 *ipv4_key;
577 ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]);
578 if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) {
579 OVS_NLERR("Unknown IPv4 fragment type (value=%d, max=%d).\n",
580 ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX);
583 SW_FLOW_KEY_PUT(match, ip.proto,
584 ipv4_key->ipv4_proto, is_mask);
585 SW_FLOW_KEY_PUT(match, ip.tos,
586 ipv4_key->ipv4_tos, is_mask);
587 SW_FLOW_KEY_PUT(match, ip.ttl,
588 ipv4_key->ipv4_ttl, is_mask);
589 SW_FLOW_KEY_PUT(match, ip.frag,
590 ipv4_key->ipv4_frag, is_mask);
591 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
592 ipv4_key->ipv4_src, is_mask);
593 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
594 ipv4_key->ipv4_dst, is_mask);
595 attrs &= ~(1ULL << OVS_KEY_ATTR_IPV4);
598 if (attrs & (1ULL << OVS_KEY_ATTR_IPV6)) {
599 const struct ovs_key_ipv6 *ipv6_key;
601 ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]);
602 if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) {
603 OVS_NLERR("Unknown IPv6 fragment type (value=%d, max=%d).\n",
604 ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX);
607 SW_FLOW_KEY_PUT(match, ipv6.label,
608 ipv6_key->ipv6_label, is_mask);
609 SW_FLOW_KEY_PUT(match, ip.proto,
610 ipv6_key->ipv6_proto, is_mask);
611 SW_FLOW_KEY_PUT(match, ip.tos,
612 ipv6_key->ipv6_tclass, is_mask);
613 SW_FLOW_KEY_PUT(match, ip.ttl,
614 ipv6_key->ipv6_hlimit, is_mask);
615 SW_FLOW_KEY_PUT(match, ip.frag,
616 ipv6_key->ipv6_frag, is_mask);
617 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src,
619 sizeof(match->key->ipv6.addr.src),
621 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst,
623 sizeof(match->key->ipv6.addr.dst),
626 attrs &= ~(1ULL << OVS_KEY_ATTR_IPV6);
629 if (attrs & (1ULL << OVS_KEY_ATTR_ARP)) {
630 const struct ovs_key_arp *arp_key;
632 arp_key = nla_data(a[OVS_KEY_ATTR_ARP]);
633 if (!is_mask && (arp_key->arp_op & htons(0xff00))) {
634 OVS_NLERR("Unknown ARP opcode (opcode=%d).\n",
639 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
640 arp_key->arp_sip, is_mask);
641 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
642 arp_key->arp_tip, is_mask);
643 SW_FLOW_KEY_PUT(match, ip.proto,
644 ntohs(arp_key->arp_op), is_mask);
645 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha,
646 arp_key->arp_sha, ETH_ALEN, is_mask);
647 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha,
648 arp_key->arp_tha, ETH_ALEN, is_mask);
650 attrs &= ~(1ULL << OVS_KEY_ATTR_ARP);
653 if (attrs & (1ULL << OVS_KEY_ATTR_TCP)) {
654 const struct ovs_key_tcp *tcp_key;
656 tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]);
657 SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask);
658 SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask);
659 attrs &= ~(1ULL << OVS_KEY_ATTR_TCP);
662 if (attrs & (1ULL << OVS_KEY_ATTR_TCP_FLAGS)) {
663 if (orig_attrs & (1ULL << OVS_KEY_ATTR_IPV4)) {
664 SW_FLOW_KEY_PUT(match, tp.flags,
665 nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]),
668 SW_FLOW_KEY_PUT(match, tp.flags,
669 nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]),
672 attrs &= ~(1ULL << OVS_KEY_ATTR_TCP_FLAGS);
675 if (attrs & (1ULL << OVS_KEY_ATTR_UDP)) {
676 const struct ovs_key_udp *udp_key;
678 udp_key = nla_data(a[OVS_KEY_ATTR_UDP]);
679 SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask);
680 SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask);
681 attrs &= ~(1ULL << OVS_KEY_ATTR_UDP);
684 if (attrs & (1ULL << OVS_KEY_ATTR_SCTP)) {
685 const struct ovs_key_sctp *sctp_key;
687 sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]);
688 SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask);
689 SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask);
690 attrs &= ~(1ULL << OVS_KEY_ATTR_SCTP);
693 if (attrs & (1ULL << OVS_KEY_ATTR_ICMP)) {
694 const struct ovs_key_icmp *icmp_key;
696 icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]);
697 SW_FLOW_KEY_PUT(match, tp.src,
698 htons(icmp_key->icmp_type), is_mask);
699 SW_FLOW_KEY_PUT(match, tp.dst,
700 htons(icmp_key->icmp_code), is_mask);
701 attrs &= ~(1ULL << OVS_KEY_ATTR_ICMP);
704 if (attrs & (1ULL << OVS_KEY_ATTR_ICMPV6)) {
705 const struct ovs_key_icmpv6 *icmpv6_key;
707 icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]);
708 SW_FLOW_KEY_PUT(match, tp.src,
709 htons(icmpv6_key->icmpv6_type), is_mask);
710 SW_FLOW_KEY_PUT(match, tp.dst,
711 htons(icmpv6_key->icmpv6_code), is_mask);
712 attrs &= ~(1ULL << OVS_KEY_ATTR_ICMPV6);
715 if (attrs & (1ULL << OVS_KEY_ATTR_ND)) {
716 const struct ovs_key_nd *nd_key;
718 nd_key = nla_data(a[OVS_KEY_ATTR_ND]);
719 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target,
721 sizeof(match->key->ipv6.nd.target),
723 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll,
724 nd_key->nd_sll, ETH_ALEN, is_mask);
725 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll,
726 nd_key->nd_tll, ETH_ALEN, is_mask);
727 attrs &= ~(1ULL << OVS_KEY_ATTR_ND);
736 static void sw_flow_mask_set(struct sw_flow_mask *mask,
737 struct sw_flow_key_range *range, u8 val)
739 u8 *m = (u8 *)&mask->key + range->start;
741 mask->range = *range;
742 memset(m, val, range_n_bytes(range));
746 * ovs_nla_get_match - parses Netlink attributes into a flow key and
747 * mask. In case the 'mask' is NULL, the flow is treated as exact match
748 * flow. Otherwise, it is treated as a wildcarded flow, except the mask
749 * does not include any don't care bit.
750 * @match: receives the extracted flow match information.
751 * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
752 * sequence. The fields should of the packet that triggered the creation
754 * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink
755 * attribute specifies the mask field of the wildcarded flow.
757 int ovs_nla_get_match(struct sw_flow_match *match,
758 const struct nlattr *key,
759 const struct nlattr *mask)
761 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
762 const struct nlattr *encap;
765 bool encap_valid = false;
768 err = parse_flow_nlattrs(key, a, &key_attrs);
772 if ((key_attrs & (1ULL << OVS_KEY_ATTR_ETHERNET)) &&
773 (key_attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)) &&
774 (nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]) == htons(ETH_P_8021Q))) {
777 if (!((key_attrs & (1ULL << OVS_KEY_ATTR_VLAN)) &&
778 (key_attrs & (1ULL << OVS_KEY_ATTR_ENCAP)))) {
779 OVS_NLERR("Invalid Vlan frame.\n");
783 key_attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE);
784 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
785 encap = a[OVS_KEY_ATTR_ENCAP];
786 key_attrs &= ~(1ULL << OVS_KEY_ATTR_ENCAP);
789 if (tci & htons(VLAN_TAG_PRESENT)) {
790 err = parse_flow_nlattrs(encap, a, &key_attrs);
794 /* Corner case for truncated 802.1Q header. */
795 if (nla_len(encap)) {
796 OVS_NLERR("Truncated 802.1Q header has non-zero encap attribute.\n");
800 OVS_NLERR("Encap attribute is set for a non-VLAN frame.\n");
805 err = ovs_key_from_nlattrs(match, key_attrs, a, false);
810 err = parse_flow_mask_nlattrs(mask, a, &mask_attrs);
814 if (mask_attrs & 1ULL << OVS_KEY_ATTR_ENCAP) {
819 OVS_NLERR("Encap mask attribute is set for non-VLAN frame.\n");
823 mask_attrs &= ~(1ULL << OVS_KEY_ATTR_ENCAP);
824 if (a[OVS_KEY_ATTR_ETHERTYPE])
825 eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
827 if (eth_type == htons(0xffff)) {
828 mask_attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE);
829 encap = a[OVS_KEY_ATTR_ENCAP];
830 err = parse_flow_mask_nlattrs(encap, a, &mask_attrs);
832 OVS_NLERR("VLAN frames must have an exact match on the TPID (mask=%x).\n",
837 if (a[OVS_KEY_ATTR_VLAN])
838 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
840 if (!(tci & htons(VLAN_TAG_PRESENT))) {
841 OVS_NLERR("VLAN tag present bit must have an exact match (tci_mask=%x).\n", ntohs(tci));
846 err = ovs_key_from_nlattrs(match, mask_attrs, a, true);
850 /* Populate exact match flow's key mask. */
852 sw_flow_mask_set(match->mask, &match->range, 0xff);
855 if (!match_validate(match, key_attrs, mask_attrs))
862 * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key.
863 * @flow: Receives extracted in_port, priority, tun_key and skb_mark.
864 * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
867 * This parses a series of Netlink attributes that form a flow key, which must
868 * take the same form accepted by flow_from_nlattrs(), but only enough of it to
869 * get the metadata, that is, the parts of the flow key that cannot be
870 * extracted from the packet itself.
873 int ovs_nla_get_flow_metadata(struct sw_flow *flow,
874 const struct nlattr *attr)
876 struct ovs_key_ipv4_tunnel *tun_key = &flow->key.tun_key;
877 const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
880 struct sw_flow_match match;
882 flow->key.phy.in_port = DP_MAX_PORTS;
883 flow->key.phy.priority = 0;
884 flow->key.phy.skb_mark = 0;
885 flow->key.ovs_flow_hash = 0;
886 flow->key.recirc_id = 0;
887 memset(tun_key, 0, sizeof(flow->key.tun_key));
889 err = parse_flow_nlattrs(attr, a, &attrs);
893 memset(&match, 0, sizeof(match));
894 match.key = &flow->key;
896 err = metadata_from_nlattrs(&match, &attrs, a, false);
903 int ovs_nla_put_flow(const struct sw_flow_key *swkey,
904 const struct sw_flow_key *output, struct sk_buff *skb)
906 struct ovs_key_ethernet *eth_key;
907 struct nlattr *nla, *encap;
908 bool is_mask = (swkey != output);
910 if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash))
911 goto nla_put_failure;
913 if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id))
914 goto nla_put_failure;
916 if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority))
917 goto nla_put_failure;
919 if ((swkey->tun_key.ipv4_dst || is_mask) &&
920 ipv4_tun_to_nlattr(skb, &swkey->tun_key, &output->tun_key))
921 goto nla_put_failure;
923 if (swkey->phy.in_port == DP_MAX_PORTS) {
924 if (is_mask && (output->phy.in_port == 0xffff))
925 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff))
926 goto nla_put_failure;
929 upper_u16 = !is_mask ? 0 : 0xffff;
931 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT,
932 (upper_u16 << 16) | output->phy.in_port))
933 goto nla_put_failure;
936 if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark))
937 goto nla_put_failure;
939 nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key));
941 goto nla_put_failure;
943 eth_key = nla_data(nla);
944 ether_addr_copy(eth_key->eth_src, output->eth.src);
945 ether_addr_copy(eth_key->eth_dst, output->eth.dst);
947 if (swkey->eth.tci || swkey->eth.type == htons(ETH_P_8021Q)) {
949 eth_type = !is_mask ? htons(ETH_P_8021Q) : htons(0xffff);
950 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) ||
951 nla_put_be16(skb, OVS_KEY_ATTR_VLAN, output->eth.tci))
952 goto nla_put_failure;
953 encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
959 if (swkey->eth.type == htons(ETH_P_802_2)) {
961 * Ethertype 802.2 is represented in the netlink with omitted
962 * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and
963 * 0xffff in the mask attribute. Ethertype can also
966 if (is_mask && output->eth.type)
967 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE,
969 goto nla_put_failure;
973 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type))
974 goto nla_put_failure;
976 if (swkey->eth.type == htons(ETH_P_IP)) {
977 struct ovs_key_ipv4 *ipv4_key;
979 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key));
981 goto nla_put_failure;
982 ipv4_key = nla_data(nla);
983 ipv4_key->ipv4_src = output->ipv4.addr.src;
984 ipv4_key->ipv4_dst = output->ipv4.addr.dst;
985 ipv4_key->ipv4_proto = output->ip.proto;
986 ipv4_key->ipv4_tos = output->ip.tos;
987 ipv4_key->ipv4_ttl = output->ip.ttl;
988 ipv4_key->ipv4_frag = output->ip.frag;
989 } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
990 struct ovs_key_ipv6 *ipv6_key;
992 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key));
994 goto nla_put_failure;
995 ipv6_key = nla_data(nla);
996 memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src,
997 sizeof(ipv6_key->ipv6_src));
998 memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst,
999 sizeof(ipv6_key->ipv6_dst));
1000 ipv6_key->ipv6_label = output->ipv6.label;
1001 ipv6_key->ipv6_proto = output->ip.proto;
1002 ipv6_key->ipv6_tclass = output->ip.tos;
1003 ipv6_key->ipv6_hlimit = output->ip.ttl;
1004 ipv6_key->ipv6_frag = output->ip.frag;
1005 } else if (swkey->eth.type == htons(ETH_P_ARP) ||
1006 swkey->eth.type == htons(ETH_P_RARP)) {
1007 struct ovs_key_arp *arp_key;
1009 nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key));
1011 goto nla_put_failure;
1012 arp_key = nla_data(nla);
1013 memset(arp_key, 0, sizeof(struct ovs_key_arp));
1014 arp_key->arp_sip = output->ipv4.addr.src;
1015 arp_key->arp_tip = output->ipv4.addr.dst;
1016 arp_key->arp_op = htons(output->ip.proto);
1017 ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha);
1018 ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha);
1021 if ((swkey->eth.type == htons(ETH_P_IP) ||
1022 swkey->eth.type == htons(ETH_P_IPV6)) &&
1023 swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
1025 if (swkey->ip.proto == IPPROTO_TCP) {
1026 struct ovs_key_tcp *tcp_key;
1028 nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key));
1030 goto nla_put_failure;
1031 tcp_key = nla_data(nla);
1032 tcp_key->tcp_src = output->tp.src;
1033 tcp_key->tcp_dst = output->tp.dst;
1034 if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS,
1036 goto nla_put_failure;
1037 } else if (swkey->ip.proto == IPPROTO_UDP) {
1038 struct ovs_key_udp *udp_key;
1040 nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key));
1042 goto nla_put_failure;
1043 udp_key = nla_data(nla);
1044 udp_key->udp_src = output->tp.src;
1045 udp_key->udp_dst = output->tp.dst;
1046 } else if (swkey->ip.proto == IPPROTO_SCTP) {
1047 struct ovs_key_sctp *sctp_key;
1049 nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key));
1051 goto nla_put_failure;
1052 sctp_key = nla_data(nla);
1053 sctp_key->sctp_src = output->tp.src;
1054 sctp_key->sctp_dst = output->tp.dst;
1055 } else if (swkey->eth.type == htons(ETH_P_IP) &&
1056 swkey->ip.proto == IPPROTO_ICMP) {
1057 struct ovs_key_icmp *icmp_key;
1059 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key));
1061 goto nla_put_failure;
1062 icmp_key = nla_data(nla);
1063 icmp_key->icmp_type = ntohs(output->tp.src);
1064 icmp_key->icmp_code = ntohs(output->tp.dst);
1065 } else if (swkey->eth.type == htons(ETH_P_IPV6) &&
1066 swkey->ip.proto == IPPROTO_ICMPV6) {
1067 struct ovs_key_icmpv6 *icmpv6_key;
1069 nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6,
1070 sizeof(*icmpv6_key));
1072 goto nla_put_failure;
1073 icmpv6_key = nla_data(nla);
1074 icmpv6_key->icmpv6_type = ntohs(output->tp.src);
1075 icmpv6_key->icmpv6_code = ntohs(output->tp.dst);
1077 if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION ||
1078 icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) {
1079 struct ovs_key_nd *nd_key;
1081 nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key));
1083 goto nla_put_failure;
1084 nd_key = nla_data(nla);
1085 memcpy(nd_key->nd_target, &output->ipv6.nd.target,
1086 sizeof(nd_key->nd_target));
1087 ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll);
1088 ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll);
1095 nla_nest_end(skb, encap);
1103 #define MAX_ACTIONS_BUFSIZE (32 * 1024)
1105 struct sw_flow_actions *ovs_nla_alloc_flow_actions(int size)
1107 struct sw_flow_actions *sfa;
1109 if (size > MAX_ACTIONS_BUFSIZE)
1110 return ERR_PTR(-EINVAL);
1112 sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL);
1114 return ERR_PTR(-ENOMEM);
1116 sfa->actions_len = 0;
1120 /* RCU callback used by ovs_nla_free_flow_actions. */
1121 static void rcu_free_acts_callback(struct rcu_head *rcu)
1123 struct sw_flow_actions *sf_acts = container_of(rcu,
1124 struct sw_flow_actions, rcu);
1128 /* Schedules 'sf_acts' to be freed after the next RCU grace period.
1129 * The caller must hold rcu_read_lock for this to be sensible. */
1130 void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts)
1132 call_rcu(&sf_acts->rcu, rcu_free_acts_callback);
1135 static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa,
1139 struct sw_flow_actions *acts;
1141 int req_size = NLA_ALIGN(attr_len);
1142 int next_offset = offsetof(struct sw_flow_actions, actions) +
1143 (*sfa)->actions_len;
1145 if (req_size <= (ksize(*sfa) - next_offset))
1148 new_acts_size = ksize(*sfa) * 2;
1150 if (new_acts_size > MAX_ACTIONS_BUFSIZE) {
1151 if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size)
1152 return ERR_PTR(-EMSGSIZE);
1153 new_acts_size = MAX_ACTIONS_BUFSIZE;
1156 acts = ovs_nla_alloc_flow_actions(new_acts_size);
1158 return (void *)acts;
1160 memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len);
1161 acts->actions_len = (*sfa)->actions_len;
1166 (*sfa)->actions_len += req_size;
1167 return (struct nlattr *) ((unsigned char *)(*sfa) + next_offset);
1170 static struct nlattr *__add_action(struct sw_flow_actions **sfa, int attrtype,
1171 void *data, int len)
1175 a = reserve_sfa_size(sfa, nla_attr_size(len));
1179 a->nla_type = attrtype;
1180 a->nla_len = nla_attr_size(len);
1183 memcpy(nla_data(a), data, len);
1184 memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len));
1189 static int add_action(struct sw_flow_actions **sfa, int attrtype,
1190 void *data, int len)
1194 a = __add_action(sfa, attrtype, data, len);
1201 static inline int add_nested_action_start(struct sw_flow_actions **sfa,
1204 int used = (*sfa)->actions_len;
1207 err = add_action(sfa, attrtype, NULL, 0);
1214 static inline void add_nested_action_end(struct sw_flow_actions *sfa,
1217 struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions +
1220 a->nla_len = sfa->actions_len - st_offset;
1223 static int validate_and_copy_sample(const struct nlattr *attr,
1224 const struct sw_flow_key *key, int depth,
1225 struct sw_flow_actions **sfa)
1227 const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];
1228 const struct nlattr *probability, *actions;
1229 const struct nlattr *a;
1230 int rem, start, err, st_acts;
1232 memset(attrs, 0, sizeof(attrs));
1233 nla_for_each_nested(a, attr, rem) {
1234 int type = nla_type(a);
1235 if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type])
1242 probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY];
1243 if (!probability || nla_len(probability) != sizeof(u32))
1246 actions = attrs[OVS_SAMPLE_ATTR_ACTIONS];
1247 if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN))
1250 /* validation done, copy sample action. */
1251 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE);
1254 err = add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY,
1255 nla_data(probability), sizeof(u32));
1258 st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS);
1262 err = ovs_nla_copy_actions(actions, key, depth + 1, sfa);
1266 add_nested_action_end(*sfa, st_acts);
1267 add_nested_action_end(*sfa, start);
1272 static int validate_tp_port(const struct sw_flow_key *flow_key)
1274 if ((flow_key->eth.type == htons(ETH_P_IP) ||
1275 flow_key->eth.type == htons(ETH_P_IPV6)) &&
1276 (flow_key->tp.src || flow_key->tp.dst))
1282 void ovs_match_init(struct sw_flow_match *match,
1283 struct sw_flow_key *key,
1284 struct sw_flow_mask *mask)
1286 memset(match, 0, sizeof(*match));
1290 memset(key, 0, sizeof(*key));
1293 memset(&mask->key, 0, sizeof(mask->key));
1294 mask->range.start = mask->range.end = 0;
1298 static int validate_and_copy_set_tun(const struct nlattr *attr,
1299 struct sw_flow_actions **sfa)
1301 struct sw_flow_match match;
1302 struct sw_flow_key key;
1303 struct ovs_tunnel_info *tun_info;
1307 ovs_match_init(&match, &key, NULL);
1308 err = ipv4_tun_from_nlattr(nla_data(attr), &match, false);
1312 start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET);
1316 a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL,
1321 tun_info = nla_data(a);
1322 tun_info->tunnel = key.tun_key;
1324 add_nested_action_end(*sfa, start);
1329 static int validate_set(const struct nlattr *a,
1330 const struct sw_flow_key *flow_key,
1331 struct sw_flow_actions **sfa,
1334 const struct nlattr *ovs_key = nla_data(a);
1335 int key_type = nla_type(ovs_key);
1337 /* There can be only one key in a action */
1338 if (nla_total_size(nla_len(ovs_key)) != nla_len(a))
1341 if (key_type > OVS_KEY_ATTR_MAX ||
1342 (ovs_key_lens[key_type] != nla_len(ovs_key) &&
1343 ovs_key_lens[key_type] != -1))
1347 const struct ovs_key_ipv4 *ipv4_key;
1348 const struct ovs_key_ipv6 *ipv6_key;
1351 case OVS_KEY_ATTR_PRIORITY:
1352 case OVS_KEY_ATTR_SKB_MARK:
1353 case OVS_KEY_ATTR_ETHERNET:
1356 case OVS_KEY_ATTR_TUNNEL:
1358 err = validate_and_copy_set_tun(a, sfa);
1363 case OVS_KEY_ATTR_IPV4:
1364 if (flow_key->eth.type != htons(ETH_P_IP))
1367 if (!flow_key->ip.proto)
1370 ipv4_key = nla_data(ovs_key);
1371 if (ipv4_key->ipv4_proto != flow_key->ip.proto)
1374 if (ipv4_key->ipv4_frag != flow_key->ip.frag)
1379 case OVS_KEY_ATTR_IPV6:
1380 if (flow_key->eth.type != htons(ETH_P_IPV6))
1383 if (!flow_key->ip.proto)
1386 ipv6_key = nla_data(ovs_key);
1387 if (ipv6_key->ipv6_proto != flow_key->ip.proto)
1390 if (ipv6_key->ipv6_frag != flow_key->ip.frag)
1393 if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000)
1398 case OVS_KEY_ATTR_TCP:
1399 if (flow_key->ip.proto != IPPROTO_TCP)
1402 return validate_tp_port(flow_key);
1404 case OVS_KEY_ATTR_UDP:
1405 if (flow_key->ip.proto != IPPROTO_UDP)
1408 return validate_tp_port(flow_key);
1410 case OVS_KEY_ATTR_SCTP:
1411 if (flow_key->ip.proto != IPPROTO_SCTP)
1414 return validate_tp_port(flow_key);
1423 static int validate_userspace(const struct nlattr *attr)
1425 static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = {
1426 [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 },
1427 [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC },
1429 struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];
1432 error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX,
1433 attr, userspace_policy);
1437 if (!a[OVS_USERSPACE_ATTR_PID] ||
1438 !nla_get_u32(a[OVS_USERSPACE_ATTR_PID]))
1444 static int copy_action(const struct nlattr *from,
1445 struct sw_flow_actions **sfa)
1447 int totlen = NLA_ALIGN(from->nla_len);
1450 to = reserve_sfa_size(sfa, from->nla_len);
1454 memcpy(to, from, totlen);
1458 int ovs_nla_copy_actions(const struct nlattr *attr,
1459 const struct sw_flow_key *key,
1461 struct sw_flow_actions **sfa)
1463 const struct nlattr *a;
1466 if (depth >= SAMPLE_ACTION_DEPTH)
1469 nla_for_each_nested(a, attr, rem) {
1470 /* Expected argument lengths, (u32)-1 for variable length. */
1471 static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {
1472 [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32),
1473 [OVS_ACTION_ATTR_RECIRC] = sizeof(u32),
1474 [OVS_ACTION_ATTR_USERSPACE] = (u32)-1,
1475 [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan),
1476 [OVS_ACTION_ATTR_POP_VLAN] = 0,
1477 [OVS_ACTION_ATTR_SET] = (u32)-1,
1478 [OVS_ACTION_ATTR_SAMPLE] = (u32)-1,
1479 [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash)
1481 const struct ovs_action_push_vlan *vlan;
1482 int type = nla_type(a);
1485 if (type > OVS_ACTION_ATTR_MAX ||
1486 (action_lens[type] != nla_len(a) &&
1487 action_lens[type] != (u32)-1))
1492 case OVS_ACTION_ATTR_UNSPEC:
1495 case OVS_ACTION_ATTR_USERSPACE:
1496 err = validate_userspace(a);
1501 case OVS_ACTION_ATTR_OUTPUT:
1502 if (nla_get_u32(a) >= DP_MAX_PORTS)
1506 case OVS_ACTION_ATTR_HASH: {
1507 const struct ovs_action_hash *act_hash = nla_data(a);
1509 switch (act_hash->hash_alg) {
1510 case OVS_HASH_ALG_L4:
1519 case OVS_ACTION_ATTR_POP_VLAN:
1522 case OVS_ACTION_ATTR_PUSH_VLAN:
1524 if (vlan->vlan_tpid != htons(ETH_P_8021Q))
1526 if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT)))
1530 case OVS_ACTION_ATTR_RECIRC:
1533 case OVS_ACTION_ATTR_SET:
1534 err = validate_set(a, key, sfa, &skip_copy);
1539 case OVS_ACTION_ATTR_SAMPLE:
1540 err = validate_and_copy_sample(a, key, depth, sfa);
1550 err = copy_action(a, sfa);
1562 static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb)
1564 const struct nlattr *a;
1565 struct nlattr *start;
1568 start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE);
1572 nla_for_each_nested(a, attr, rem) {
1573 int type = nla_type(a);
1574 struct nlattr *st_sample;
1577 case OVS_SAMPLE_ATTR_PROBABILITY:
1578 if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY,
1579 sizeof(u32), nla_data(a)))
1582 case OVS_SAMPLE_ATTR_ACTIONS:
1583 st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS);
1586 err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb);
1589 nla_nest_end(skb, st_sample);
1594 nla_nest_end(skb, start);
1598 static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb)
1600 const struct nlattr *ovs_key = nla_data(a);
1601 int key_type = nla_type(ovs_key);
1602 struct nlattr *start;
1606 case OVS_KEY_ATTR_TUNNEL_INFO: {
1607 struct ovs_tunnel_info *tun_info = nla_data(ovs_key);
1609 start = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
1613 err = ipv4_tun_to_nlattr(skb, &tun_info->tunnel,
1617 nla_nest_end(skb, start);
1621 if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key))
1629 int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb)
1631 const struct nlattr *a;
1634 nla_for_each_attr(a, attr, len, rem) {
1635 int type = nla_type(a);
1638 case OVS_ACTION_ATTR_SET:
1639 err = set_action_to_attr(a, skb);
1644 case OVS_ACTION_ATTR_SAMPLE:
1645 err = sample_action_to_attr(a, skb);
1650 if (nla_put(skb, type, nla_len(a), nla_data(a)))