2 * Copyright (c) 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
19 #include "netdev-vport.h"
23 #include <sys/socket.h>
25 #include <sys/ioctl.h>
27 #include "byte-order.h"
32 #include "dynamic-string.h"
37 #include "netdev-provider.h"
38 #include "odp-netlink.h"
40 #include "ovs-router.h"
42 #include "packet-dpif.h"
43 #include "poll-loop.h"
44 #include "route-table.h"
46 #include "socket-util.h"
47 #include "openvswitch/vlog.h"
48 #include "unaligned.h"
52 VLOG_DEFINE_THIS_MODULE(netdev_vport);
53 static struct vlog_rate_limit err_rl = VLOG_RATE_LIMIT_INIT(60, 5);
55 #define GENEVE_DST_PORT 6081
56 #define VXLAN_DST_PORT 4789
57 #define LISP_DST_PORT 4341
59 #define VXLAN_HLEN (sizeof(struct eth_header) + \
60 sizeof(struct ip_header) + \
61 sizeof(struct udp_header) + \
62 sizeof(struct vxlanhdr))
64 #define DEFAULT_TTL 64
69 /* Protects all members below. */
70 struct ovs_mutex mutex;
72 uint8_t etheraddr[ETH_ADDR_LEN];
73 struct netdev_stats stats;
76 struct netdev_tunnel_config tnl_cfg;
77 char egress_iface[IFNAMSIZ];
85 const char *dpif_port;
86 struct netdev_class netdev_class;
89 /* Last read of the route-table's change number. */
90 static uint64_t rt_change_seqno;
92 static int netdev_vport_construct(struct netdev *);
93 static int get_patch_config(const struct netdev *netdev, struct smap *args);
94 static int get_tunnel_config(const struct netdev *, struct smap *args);
95 static bool tunnel_check_status_change__(struct netdev_vport *);
97 static uint16_t tnl_udp_port_min = 32768;
98 static uint16_t tnl_udp_port_max = 61000;
101 is_vport_class(const struct netdev_class *class)
103 return class->construct == netdev_vport_construct;
107 netdev_vport_is_vport_class(const struct netdev_class *class)
109 return is_vport_class(class);
112 static const struct vport_class *
113 vport_class_cast(const struct netdev_class *class)
115 ovs_assert(is_vport_class(class));
116 return CONTAINER_OF(class, struct vport_class, netdev_class);
119 static struct netdev_vport *
120 netdev_vport_cast(const struct netdev *netdev)
122 ovs_assert(is_vport_class(netdev_get_class(netdev)));
123 return CONTAINER_OF(netdev, struct netdev_vport, up);
126 static const struct netdev_tunnel_config *
127 get_netdev_tunnel_config(const struct netdev *netdev)
129 return &netdev_vport_cast(netdev)->tnl_cfg;
133 netdev_vport_is_patch(const struct netdev *netdev)
135 const struct netdev_class *class = netdev_get_class(netdev);
137 return class->get_config == get_patch_config;
141 netdev_vport_is_layer3(const struct netdev *dev)
143 const char *type = netdev_get_type(dev);
145 return (!strcmp("lisp", type));
149 netdev_vport_needs_dst_port(const struct netdev *dev)
151 const struct netdev_class *class = netdev_get_class(dev);
152 const char *type = netdev_get_type(dev);
154 return (class->get_config == get_tunnel_config &&
155 (!strcmp("geneve", type) || !strcmp("vxlan", type) ||
156 !strcmp("lisp", type)));
160 netdev_vport_class_get_dpif_port(const struct netdev_class *class)
162 return is_vport_class(class) ? vport_class_cast(class)->dpif_port : NULL;
166 netdev_vport_get_dpif_port(const struct netdev *netdev,
167 char namebuf[], size_t bufsize)
169 const struct netdev_class *class = netdev_get_class(netdev);
170 const char *dpif_port = netdev_vport_class_get_dpif_port(class);
173 return netdev_get_name(netdev);
176 if (netdev_vport_needs_dst_port(netdev)) {
177 const struct netdev_vport *vport = netdev_vport_cast(netdev);
180 * Note: IFNAMSIZ is 16 bytes long. Implementations should choose
181 * a dpif port name that is short enough to fit including any
182 * port numbers but assert just in case.
184 BUILD_ASSERT(NETDEV_VPORT_NAME_BUFSIZE >= IFNAMSIZ);
185 ovs_assert(strlen(dpif_port) + 6 < IFNAMSIZ);
186 snprintf(namebuf, bufsize, "%s_%d", dpif_port,
187 ntohs(vport->tnl_cfg.dst_port));
195 netdev_vport_get_dpif_port_strdup(const struct netdev *netdev)
197 char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
199 return xstrdup(netdev_vport_get_dpif_port(netdev, namebuf,
203 /* Whenever the route-table change number is incremented,
204 * netdev_vport_route_changed() should be called to update
205 * the corresponding tunnel interface status. */
207 netdev_vport_route_changed(void)
209 struct netdev **vports;
212 vports = netdev_get_vports(&n_vports);
213 for (i = 0; i < n_vports; i++) {
214 struct netdev *netdev_ = vports[i];
215 struct netdev_vport *netdev = netdev_vport_cast(netdev_);
217 ovs_mutex_lock(&netdev->mutex);
218 /* Finds all tunnel vports. */
219 if (netdev->tnl_cfg.ip_dst) {
220 if (tunnel_check_status_change__(netdev)) {
221 netdev_change_seq_changed(netdev_);
224 ovs_mutex_unlock(&netdev->mutex);
226 netdev_close(netdev_);
232 static struct netdev *
233 netdev_vport_alloc(void)
235 struct netdev_vport *netdev = xzalloc(sizeof *netdev);
240 netdev_vport_construct(struct netdev *netdev_)
242 struct netdev_vport *dev = netdev_vport_cast(netdev_);
243 const char *type = netdev_get_type(netdev_);
245 ovs_mutex_init(&dev->mutex);
246 eth_addr_random(dev->etheraddr);
248 /* Add a default destination port for tunnel ports if none specified. */
249 if (!strcmp(type, "geneve")) {
250 dev->tnl_cfg.dst_port = htons(GENEVE_DST_PORT);
251 } else if (!strcmp(type, "vxlan")) {
252 dev->tnl_cfg.dst_port = htons(VXLAN_DST_PORT);
253 } else if (!strcmp(type, "lisp")) {
254 dev->tnl_cfg.dst_port = htons(LISP_DST_PORT);
261 netdev_vport_destruct(struct netdev *netdev_)
263 struct netdev_vport *netdev = netdev_vport_cast(netdev_);
266 ovs_mutex_destroy(&netdev->mutex);
270 netdev_vport_dealloc(struct netdev *netdev_)
272 struct netdev_vport *netdev = netdev_vport_cast(netdev_);
277 netdev_vport_set_etheraddr(struct netdev *netdev_,
278 const uint8_t mac[ETH_ADDR_LEN])
280 struct netdev_vport *netdev = netdev_vport_cast(netdev_);
282 ovs_mutex_lock(&netdev->mutex);
283 memcpy(netdev->etheraddr, mac, ETH_ADDR_LEN);
284 ovs_mutex_unlock(&netdev->mutex);
285 netdev_change_seq_changed(netdev_);
291 netdev_vport_get_etheraddr(const struct netdev *netdev_,
292 uint8_t mac[ETH_ADDR_LEN])
294 struct netdev_vport *netdev = netdev_vport_cast(netdev_);
296 ovs_mutex_lock(&netdev->mutex);
297 memcpy(mac, netdev->etheraddr, ETH_ADDR_LEN);
298 ovs_mutex_unlock(&netdev->mutex);
303 /* Checks if the tunnel status has changed and returns a boolean.
304 * Updates the tunnel status if it has changed. */
306 tunnel_check_status_change__(struct netdev_vport *netdev)
307 OVS_REQUIRES(netdev->mutex)
309 char iface[IFNAMSIZ];
315 route = netdev->tnl_cfg.ip_dst;
316 if (ovs_router_lookup(route, iface, &gw)) {
317 struct netdev *egress_netdev;
319 if (!netdev_open(iface, "system", &egress_netdev)) {
320 status = netdev_get_carrier(egress_netdev);
321 netdev_close(egress_netdev);
325 if (strcmp(netdev->egress_iface, iface)
326 || netdev->carrier_status != status) {
327 ovs_strlcpy(netdev->egress_iface, iface, IFNAMSIZ);
328 netdev->carrier_status = status;
337 tunnel_get_status(const struct netdev *netdev_, struct smap *smap)
339 struct netdev_vport *netdev = netdev_vport_cast(netdev_);
341 if (netdev->egress_iface[0]) {
342 smap_add(smap, "tunnel_egress_iface", netdev->egress_iface);
344 smap_add(smap, "tunnel_egress_iface_carrier",
345 netdev->carrier_status ? "up" : "down");
352 netdev_vport_update_flags(struct netdev *netdev OVS_UNUSED,
353 enum netdev_flags off,
354 enum netdev_flags on OVS_UNUSED,
355 enum netdev_flags *old_flagsp)
357 if (off & (NETDEV_UP | NETDEV_PROMISC)) {
361 *old_flagsp = NETDEV_UP | NETDEV_PROMISC;
366 netdev_vport_run(void)
371 seq = route_table_get_change_seq();
372 if (rt_change_seqno != seq) {
373 rt_change_seqno = seq;
374 netdev_vport_route_changed();
379 netdev_vport_wait(void)
384 seq = route_table_get_change_seq();
385 if (rt_change_seqno != seq) {
386 poll_immediate_wake();
390 /* Code specific to tunnel types. */
393 parse_key(const struct smap *args, const char *name,
394 bool *present, bool *flow)
401 s = smap_get(args, name);
403 s = smap_get(args, "key");
411 if (!strcmp(s, "flow")) {
415 return htonll(strtoull(s, NULL, 0));
420 set_tunnel_config(struct netdev *dev_, const struct smap *args)
422 struct netdev_vport *dev = netdev_vport_cast(dev_);
423 const char *name = netdev_get_name(dev_);
424 const char *type = netdev_get_type(dev_);
425 bool ipsec_mech_set, needs_dst_port, has_csum;
426 struct netdev_tunnel_config tnl_cfg;
427 struct smap_node *node;
429 has_csum = strstr(type, "gre");
430 ipsec_mech_set = false;
431 memset(&tnl_cfg, 0, sizeof tnl_cfg);
433 /* Add a default destination port for tunnel ports if none specified. */
434 if (!strcmp(type, "geneve")) {
435 tnl_cfg.dst_port = htons(GENEVE_DST_PORT);
438 if (!strcmp(type, "vxlan")) {
439 tnl_cfg.dst_port = htons(VXLAN_DST_PORT);
442 if (!strcmp(type, "lisp")) {
443 tnl_cfg.dst_port = htons(LISP_DST_PORT);
446 needs_dst_port = netdev_vport_needs_dst_port(dev_);
447 tnl_cfg.ipsec = strstr(type, "ipsec");
448 tnl_cfg.dont_fragment = true;
450 SMAP_FOR_EACH (node, args) {
451 if (!strcmp(node->key, "remote_ip")) {
452 struct in_addr in_addr;
453 if (!strcmp(node->value, "flow")) {
454 tnl_cfg.ip_dst_flow = true;
455 tnl_cfg.ip_dst = htonl(0);
456 } else if (lookup_ip(node->value, &in_addr)) {
457 VLOG_WARN("%s: bad %s 'remote_ip'", name, type);
458 } else if (ip_is_multicast(in_addr.s_addr)) {
459 VLOG_WARN("%s: multicast remote_ip="IP_FMT" not allowed",
460 name, IP_ARGS(in_addr.s_addr));
463 tnl_cfg.ip_dst = in_addr.s_addr;
465 } else if (!strcmp(node->key, "local_ip")) {
466 struct in_addr in_addr;
467 if (!strcmp(node->value, "flow")) {
468 tnl_cfg.ip_src_flow = true;
469 tnl_cfg.ip_src = htonl(0);
470 } else if (lookup_ip(node->value, &in_addr)) {
471 VLOG_WARN("%s: bad %s 'local_ip'", name, type);
473 tnl_cfg.ip_src = in_addr.s_addr;
475 } else if (!strcmp(node->key, "tos")) {
476 if (!strcmp(node->value, "inherit")) {
477 tnl_cfg.tos_inherit = true;
481 tos = strtol(node->value, &endptr, 0);
482 if (*endptr == '\0' && tos == (tos & IP_DSCP_MASK)) {
485 VLOG_WARN("%s: invalid TOS %s", name, node->value);
488 } else if (!strcmp(node->key, "ttl")) {
489 if (!strcmp(node->value, "inherit")) {
490 tnl_cfg.ttl_inherit = true;
492 tnl_cfg.ttl = atoi(node->value);
494 } else if (!strcmp(node->key, "dst_port") && needs_dst_port) {
495 tnl_cfg.dst_port = htons(atoi(node->value));
496 } else if (!strcmp(node->key, "csum") && has_csum) {
497 if (!strcmp(node->value, "true")) {
500 } else if (!strcmp(node->key, "df_default")) {
501 if (!strcmp(node->value, "false")) {
502 tnl_cfg.dont_fragment = false;
504 } else if (!strcmp(node->key, "peer_cert") && tnl_cfg.ipsec) {
505 if (smap_get(args, "certificate")) {
506 ipsec_mech_set = true;
508 const char *use_ssl_cert;
510 /* If the "use_ssl_cert" is true, then "certificate" and
511 * "private_key" will be pulled from the SSL table. The
512 * use of this option is strongly discouraged, since it
513 * will like be removed when multiple SSL configurations
514 * are supported by OVS.
516 use_ssl_cert = smap_get(args, "use_ssl_cert");
517 if (!use_ssl_cert || strcmp(use_ssl_cert, "true")) {
518 VLOG_ERR("%s: 'peer_cert' requires 'certificate' argument",
522 ipsec_mech_set = true;
524 } else if (!strcmp(node->key, "psk") && tnl_cfg.ipsec) {
525 ipsec_mech_set = true;
526 } else if (tnl_cfg.ipsec
527 && (!strcmp(node->key, "certificate")
528 || !strcmp(node->key, "private_key")
529 || !strcmp(node->key, "use_ssl_cert"))) {
530 /* Ignore options not used by the netdev. */
531 } else if (!strcmp(node->key, "key") ||
532 !strcmp(node->key, "in_key") ||
533 !strcmp(node->key, "out_key")) {
534 /* Handled separately below. */
535 } else if (!strcmp(node->key, "exts")) {
536 char *str = xstrdup(node->value);
537 char *ext, *save_ptr = NULL;
541 ext = strtok_r(str, ",", &save_ptr);
543 if (!strcmp(type, "vxlan") && !strcmp(ext, "gbp")) {
544 tnl_cfg.exts |= (1 << OVS_VXLAN_EXT_GBP);
546 VLOG_WARN("%s: unknown extension '%s'", name, ext);
549 ext = strtok_r(NULL, ",", &save_ptr);
554 VLOG_WARN("%s: unknown %s argument '%s'", name, type, node->key);
559 static struct ovs_mutex mutex = OVS_MUTEX_INITIALIZER;
560 static pid_t pid = 0;
563 ovs_mutex_lock(&mutex);
565 char *file_name = xasprintf("%s/%s", ovs_rundir(),
566 "ovs-monitor-ipsec.pid");
567 pid = read_pidfile(file_name);
570 ovs_mutex_unlock(&mutex);
574 VLOG_ERR("%s: IPsec requires the ovs-monitor-ipsec daemon",
579 if (smap_get(args, "peer_cert") && smap_get(args, "psk")) {
580 VLOG_ERR("%s: cannot define both 'peer_cert' and 'psk'", name);
584 if (!ipsec_mech_set) {
585 VLOG_ERR("%s: IPsec requires an 'peer_cert' or psk' argument",
591 if (!tnl_cfg.ip_dst && !tnl_cfg.ip_dst_flow) {
592 VLOG_ERR("%s: %s type requires valid 'remote_ip' argument",
596 if (tnl_cfg.ip_src_flow && !tnl_cfg.ip_dst_flow) {
597 VLOG_ERR("%s: %s type requires 'remote_ip=flow' with 'local_ip=flow'",
602 tnl_cfg.ttl = DEFAULT_TTL;
605 tnl_cfg.in_key = parse_key(args, "in_key",
606 &tnl_cfg.in_key_present,
607 &tnl_cfg.in_key_flow);
609 tnl_cfg.out_key = parse_key(args, "out_key",
610 &tnl_cfg.out_key_present,
611 &tnl_cfg.out_key_flow);
613 ovs_mutex_lock(&dev->mutex);
614 dev->tnl_cfg = tnl_cfg;
615 tunnel_check_status_change__(dev);
616 netdev_change_seq_changed(dev_);
617 ovs_mutex_unlock(&dev->mutex);
623 get_tunnel_config(const struct netdev *dev, struct smap *args)
625 struct netdev_vport *netdev = netdev_vport_cast(dev);
626 struct netdev_tunnel_config tnl_cfg;
628 ovs_mutex_lock(&netdev->mutex);
629 tnl_cfg = netdev->tnl_cfg;
630 ovs_mutex_unlock(&netdev->mutex);
632 if (tnl_cfg.ip_dst) {
633 smap_add_format(args, "remote_ip", IP_FMT, IP_ARGS(tnl_cfg.ip_dst));
634 } else if (tnl_cfg.ip_dst_flow) {
635 smap_add(args, "remote_ip", "flow");
638 if (tnl_cfg.ip_src) {
639 smap_add_format(args, "local_ip", IP_FMT, IP_ARGS(tnl_cfg.ip_src));
640 } else if (tnl_cfg.ip_src_flow) {
641 smap_add(args, "local_ip", "flow");
644 if (tnl_cfg.in_key_flow && tnl_cfg.out_key_flow) {
645 smap_add(args, "key", "flow");
646 } else if (tnl_cfg.in_key_present && tnl_cfg.out_key_present
647 && tnl_cfg.in_key == tnl_cfg.out_key) {
648 smap_add_format(args, "key", "%"PRIu64, ntohll(tnl_cfg.in_key));
650 if (tnl_cfg.in_key_flow) {
651 smap_add(args, "in_key", "flow");
652 } else if (tnl_cfg.in_key_present) {
653 smap_add_format(args, "in_key", "%"PRIu64,
654 ntohll(tnl_cfg.in_key));
657 if (tnl_cfg.out_key_flow) {
658 smap_add(args, "out_key", "flow");
659 } else if (tnl_cfg.out_key_present) {
660 smap_add_format(args, "out_key", "%"PRIu64,
661 ntohll(tnl_cfg.out_key));
665 if (tnl_cfg.ttl_inherit) {
666 smap_add(args, "ttl", "inherit");
667 } else if (tnl_cfg.ttl != DEFAULT_TTL) {
668 smap_add_format(args, "ttl", "%"PRIu8, tnl_cfg.ttl);
671 if (tnl_cfg.tos_inherit) {
672 smap_add(args, "tos", "inherit");
673 } else if (tnl_cfg.tos) {
674 smap_add_format(args, "tos", "0x%x", tnl_cfg.tos);
677 if (tnl_cfg.dst_port) {
678 uint16_t dst_port = ntohs(tnl_cfg.dst_port);
679 const char *type = netdev_get_type(dev);
681 if ((!strcmp("geneve", type) && dst_port != GENEVE_DST_PORT) ||
682 (!strcmp("vxlan", type) && dst_port != VXLAN_DST_PORT) ||
683 (!strcmp("lisp", type) && dst_port != LISP_DST_PORT)) {
684 smap_add_format(args, "dst_port", "%d", dst_port);
689 smap_add(args, "csum", "true");
692 if (!tnl_cfg.dont_fragment) {
693 smap_add(args, "df_default", "false");
699 /* Code specific to patch ports. */
701 /* If 'netdev' is a patch port, returns the name of its peer as a malloc()'d
702 * string that the caller must free.
704 * If 'netdev' is not a patch port, returns NULL. */
706 netdev_vport_patch_peer(const struct netdev *netdev_)
710 if (netdev_vport_is_patch(netdev_)) {
711 struct netdev_vport *netdev = netdev_vport_cast(netdev_);
713 ovs_mutex_lock(&netdev->mutex);
715 peer = xstrdup(netdev->peer);
717 ovs_mutex_unlock(&netdev->mutex);
724 netdev_vport_inc_rx(const struct netdev *netdev,
725 const struct dpif_flow_stats *stats)
727 if (is_vport_class(netdev_get_class(netdev))) {
728 struct netdev_vport *dev = netdev_vport_cast(netdev);
730 ovs_mutex_lock(&dev->mutex);
731 dev->stats.rx_packets += stats->n_packets;
732 dev->stats.rx_bytes += stats->n_bytes;
733 ovs_mutex_unlock(&dev->mutex);
738 netdev_vport_inc_tx(const struct netdev *netdev,
739 const struct dpif_flow_stats *stats)
741 if (is_vport_class(netdev_get_class(netdev))) {
742 struct netdev_vport *dev = netdev_vport_cast(netdev);
744 ovs_mutex_lock(&dev->mutex);
745 dev->stats.tx_packets += stats->n_packets;
746 dev->stats.tx_bytes += stats->n_bytes;
747 ovs_mutex_unlock(&dev->mutex);
752 get_patch_config(const struct netdev *dev_, struct smap *args)
754 struct netdev_vport *dev = netdev_vport_cast(dev_);
756 ovs_mutex_lock(&dev->mutex);
758 smap_add(args, "peer", dev->peer);
760 ovs_mutex_unlock(&dev->mutex);
766 set_patch_config(struct netdev *dev_, const struct smap *args)
768 struct netdev_vport *dev = netdev_vport_cast(dev_);
769 const char *name = netdev_get_name(dev_);
772 peer = smap_get(args, "peer");
774 VLOG_ERR("%s: patch type requires valid 'peer' argument", name);
778 if (smap_count(args) > 1) {
779 VLOG_ERR("%s: patch type takes only a 'peer' argument", name);
783 if (!strcmp(name, peer)) {
784 VLOG_ERR("%s: patch peer must not be self", name);
788 ovs_mutex_lock(&dev->mutex);
790 dev->peer = xstrdup(peer);
791 netdev_change_seq_changed(dev_);
792 ovs_mutex_unlock(&dev->mutex);
798 get_stats(const struct netdev *netdev, struct netdev_stats *stats)
800 struct netdev_vport *dev = netdev_vport_cast(netdev);
802 ovs_mutex_lock(&dev->mutex);
804 ovs_mutex_unlock(&dev->mutex);
810 /* Tunnel push pop ops. */
812 static struct ip_header *
815 return (void *)((char *)eth + sizeof (struct eth_header));
818 static struct gre_base_hdr *
819 gre_hdr(struct ip_header *ip)
821 return (void *)((char *)ip + sizeof (struct ip_header));
825 ip_extract_tnl_md(struct ofpbuf *packet, struct flow_tnl *tnl)
827 struct ip_header *nh;
830 nh = ofpbuf_l3(packet);
831 l4 = ofpbuf_l4(packet);
837 tnl->ip_src = get_16aligned_be32(&nh->ip_src);
838 tnl->ip_dst = get_16aligned_be32(&nh->ip_dst);
839 tnl->ip_tos = nh->ip_tos;
844 /* Pushes the 'size' bytes of 'header' into the headroom of 'packet',
845 * reallocating the packet if necessary. 'header' should contain an Ethernet
846 * header, followed by an IPv4 header (without options), and an L4 header.
848 * This function sets the IP header's ip_tot_len field (which should be zeroed
849 * as part of 'header') and puts its value into '*ip_tot_size' as well. Also
850 * updates IP header checksum.
852 * Return pointer to the L4 header added to 'packet'. */
854 push_ip_header(struct ofpbuf *packet,
855 const void *header, int size, int *ip_tot_size)
857 struct eth_header *eth;
858 struct ip_header *ip;
860 eth = ofpbuf_push_uninit(packet, size);
861 *ip_tot_size = ofpbuf_size(packet) - sizeof (struct eth_header);
863 memcpy(eth, header, size);
865 ip->ip_tot_len = htons(*ip_tot_size);
868 ip->ip_csum = recalc_csum16(ip->ip_csum, 0, ip->ip_tot_len);
874 gre_header_len(ovs_be16 flags)
876 int hlen = sizeof(struct eth_header) +
877 sizeof(struct ip_header) + 4;
879 if (flags & htons(GRE_CSUM)) {
882 if (flags & htons(GRE_KEY)) {
885 if (flags & htons(GRE_SEQ)) {
892 parse_gre_header(struct ofpbuf *packet,
893 struct flow_tnl *tnl)
895 const struct gre_base_hdr *greh;
896 ovs_16aligned_be32 *options;
899 greh = ip_extract_tnl_md(packet, tnl);
904 if (greh->flags & ~(htons(GRE_CSUM | GRE_KEY | GRE_SEQ))) {
908 hlen = gre_header_len(greh->flags);
909 if (hlen > ofpbuf_size(packet)) {
913 options = (ovs_16aligned_be32 *)(greh + 1);
914 if (greh->flags & htons(GRE_CSUM)) {
917 pkt_csum = csum(greh, ofpbuf_size(packet) -
918 ((const unsigned char *)greh -
919 (const unsigned char *)ofpbuf_l2(packet)));
923 tnl->flags = FLOW_TNL_F_CSUM;
927 if (greh->flags & htons(GRE_KEY)) {
928 tnl->tun_id = (OVS_FORCE ovs_be64) ((OVS_FORCE uint64_t)(get_16aligned_be32(options)) << 32);
929 tnl->flags |= FLOW_TNL_F_KEY;
933 if (greh->flags & htons(GRE_SEQ)) {
941 reset_tnl_md(struct pkt_metadata *md)
943 memset(&md->tunnel, 0, sizeof(md->tunnel));
947 gre_extract_md(struct dpif_packet *dpif_pkt)
949 struct ofpbuf *packet = &dpif_pkt->ofpbuf;
950 struct pkt_metadata *md = &dpif_pkt->md;
951 struct flow_tnl *tnl = &md->tunnel;
952 int hlen = sizeof(struct eth_header) +
953 sizeof(struct ip_header) + 4;
955 memset(md, 0, sizeof *md);
956 if (hlen > ofpbuf_size(packet)) {
960 hlen = parse_gre_header(packet, tnl);
965 ofpbuf_reset_packet(packet, hlen);
969 netdev_gre_pop_header(struct netdev *netdev_ OVS_UNUSED,
970 struct dpif_packet **pkt, int cnt)
974 for (i = 0; i < cnt; i++) {
975 gre_extract_md(pkt[i]);
981 netdev_gre_push_header__(struct ofpbuf *packet,
982 const void *header, int size)
984 struct gre_base_hdr *greh;
987 greh = push_ip_header(packet, header, size, &ip_tot_size);
989 if (greh->flags & htons(GRE_CSUM)) {
990 ovs_16aligned_be32 *options = (ovs_16aligned_be32 *) (greh + 1);
992 put_16aligned_be32(options,
993 (OVS_FORCE ovs_be32) csum(greh, ip_tot_size - sizeof (struct ip_header)));
998 netdev_gre_push_header(const struct netdev *netdev OVS_UNUSED,
999 struct dpif_packet **packets, int cnt,
1000 const struct ovs_action_push_tnl *data)
1004 for (i = 0; i < cnt; i++) {
1005 netdev_gre_push_header__(&packets[i]->ofpbuf,
1006 data->header, data->header_len);
1007 packets[i]->md = PKT_METADATA_INITIALIZER(u32_to_odp(data->out_port));
1014 netdev_gre_build_header(const struct netdev *netdev,
1015 struct ovs_action_push_tnl *data)
1017 struct netdev_vport *dev = netdev_vport_cast(netdev);
1018 struct netdev_tunnel_config *tnl_cfg;
1019 struct ip_header *ip;
1020 struct gre_base_hdr *greh;
1021 ovs_16aligned_be32 *options;
1024 /* XXX: RCUfy tnl_cfg. */
1025 ovs_mutex_lock(&dev->mutex);
1026 tnl_cfg = &dev->tnl_cfg;
1028 ip = ip_hdr(data->header);
1029 ip->ip_proto = IPPROTO_GRE;
1032 greh->protocol = htons(ETH_TYPE_TEB);
1035 options = (ovs_16aligned_be32 *) (greh + 1);
1036 if (tnl_cfg->csum) {
1037 greh->flags |= htons(GRE_CSUM);
1038 put_16aligned_be32(options, 0);
1042 if (tnl_cfg->out_key_present) {
1043 greh->flags |= htons(GRE_KEY);
1044 put_16aligned_be32(options, (OVS_FORCE ovs_be32)
1045 ((OVS_FORCE uint64_t) tnl_cfg->out_key >> 32));
1049 ovs_mutex_unlock(&dev->mutex);
1051 hlen = (uint8_t *) options - (uint8_t *) greh;
1053 data->header_len = sizeof(struct eth_header) +
1054 sizeof(struct ip_header) + hlen;
1055 data->tnl_type = OVS_VPORT_TYPE_GRE;
1060 vxlan_extract_md(struct dpif_packet *dpif_pkt)
1062 struct ofpbuf *packet = &dpif_pkt->ofpbuf;
1063 struct pkt_metadata *md = &dpif_pkt->md;
1064 struct flow_tnl *tnl = &md->tunnel;
1065 struct udp_header *udp;
1066 struct vxlanhdr *vxh;
1068 memset(md, 0, sizeof *md);
1069 if (VXLAN_HLEN > ofpbuf_size(packet)) {
1073 udp = ip_extract_tnl_md(packet, tnl);
1077 vxh = (struct vxlanhdr *) (udp + 1);
1079 if (get_16aligned_be32(&vxh->vx_flags) != htonl(VXLAN_FLAGS) ||
1080 (get_16aligned_be32(&vxh->vx_vni) & htonl(0xff))) {
1081 VLOG_WARN_RL(&err_rl, "invalid vxlan flags=%#x vni=%#x\n",
1082 ntohl(get_16aligned_be32(&vxh->vx_flags)),
1083 ntohl(get_16aligned_be32(&vxh->vx_vni)));
1087 tnl->tp_src = udp->udp_src;
1088 tnl->tp_dst = udp->udp_dst;
1089 tnl->tun_id = htonll(ntohl(get_16aligned_be32(&vxh->vx_vni)) >> 8);
1091 ofpbuf_reset_packet(packet, VXLAN_HLEN);
1095 netdev_vxlan_pop_header(struct netdev *netdev_ OVS_UNUSED,
1096 struct dpif_packet **pkt, int cnt)
1100 for (i = 0; i < cnt; i++) {
1101 vxlan_extract_md(pkt[i]);
1107 netdev_vxlan_build_header(const struct netdev *netdev,
1108 struct ovs_action_push_tnl *data)
1110 struct netdev_vport *dev = netdev_vport_cast(netdev);
1111 struct netdev_tunnel_config *tnl_cfg;
1112 struct ip_header *ip;
1113 struct udp_header *udp;
1114 struct vxlanhdr *vxh;
1116 /* XXX: RCUfy tnl_cfg. */
1117 ovs_mutex_lock(&dev->mutex);
1118 tnl_cfg = &dev->tnl_cfg;
1120 ip = ip_hdr(data->header);
1121 ip->ip_proto = IPPROTO_UDP;
1123 udp = (struct udp_header *) (ip + 1);
1124 udp->udp_dst = tnl_cfg->dst_port;
1126 vxh = (struct vxlanhdr *) (udp + 1);
1127 put_16aligned_be32(&vxh->vx_flags, htonl(VXLAN_FLAGS));
1128 put_16aligned_be32(&vxh->vx_vni, htonl(ntohll(tnl_cfg->out_key) << 8));
1130 ovs_mutex_unlock(&dev->mutex);
1131 data->header_len = VXLAN_HLEN;
1132 data->tnl_type = OVS_VPORT_TYPE_VXLAN;
1137 get_src_port(struct dpif_packet *packet)
1141 hash = dpif_packet_get_dp_hash(packet);
1143 return htons((((uint64_t) hash * (tnl_udp_port_max - tnl_udp_port_min)) >> 32) +
1148 netdev_vxlan_push_header__(struct dpif_packet *packet,
1149 const void *header, int size)
1151 struct udp_header *udp;
1154 udp = push_ip_header(&packet->ofpbuf, header, size, &ip_tot_size);
1156 /* set udp src port */
1157 udp->udp_src = get_src_port(packet);
1158 udp->udp_len = htons(ip_tot_size - sizeof (struct ip_header));
1159 /* udp_csum is zero */
1163 netdev_vxlan_push_header(const struct netdev *netdev OVS_UNUSED,
1164 struct dpif_packet **packets, int cnt,
1165 const struct ovs_action_push_tnl *data)
1169 for (i = 0; i < cnt; i++) {
1170 netdev_vxlan_push_header__(packets[i],
1171 data->header, VXLAN_HLEN);
1172 packets[i]->md = PKT_METADATA_INITIALIZER(u32_to_odp(data->out_port));
1178 netdev_vport_range(struct unixctl_conn *conn, int argc,
1179 const char *argv[], void *aux OVS_UNUSED)
1184 struct ds ds = DS_EMPTY_INITIALIZER;
1186 ds_put_format(&ds, "Tunnel UDP source port range: %"PRIu16"-%"PRIu16"\n",
1187 tnl_udp_port_min, tnl_udp_port_max);
1189 unixctl_command_reply(conn, ds_cstr(&ds));
1198 val1 = atoi(argv[1]);
1199 if (val1 <= 0 || val1 > UINT16_MAX) {
1200 unixctl_command_reply(conn, "Invalid min.");
1203 val2 = atoi(argv[2]);
1204 if (val2 <= 0 || val2 > UINT16_MAX) {
1205 unixctl_command_reply(conn, "Invalid max.");
1210 tnl_udp_port_min = val2;
1211 tnl_udp_port_max = val1;
1213 tnl_udp_port_min = val1;
1214 tnl_udp_port_max = val2;
1216 seq_change(tnl_conf_seq);
1218 unixctl_command_reply(conn, "OK");
1222 #define VPORT_FUNCTIONS(GET_CONFIG, SET_CONFIG, \
1223 GET_TUNNEL_CONFIG, GET_STATUS, \
1225 PUSH_HEADER, POP_HEADER) \
1228 netdev_vport_wait, \
1230 netdev_vport_alloc, \
1231 netdev_vport_construct, \
1232 netdev_vport_destruct, \
1233 netdev_vport_dealloc, \
1236 GET_TUNNEL_CONFIG, \
1240 NULL, /* get_numa_id */ \
1241 NULL, /* set_multiq */ \
1244 NULL, /* send_wait */ \
1246 netdev_vport_set_etheraddr, \
1247 netdev_vport_get_etheraddr, \
1248 NULL, /* get_mtu */ \
1249 NULL, /* set_mtu */ \
1250 NULL, /* get_ifindex */ \
1251 NULL, /* get_carrier */ \
1252 NULL, /* get_carrier_resets */ \
1253 NULL, /* get_miimon */ \
1256 NULL, /* get_features */ \
1257 NULL, /* set_advertisements */ \
1259 NULL, /* set_policing */ \
1260 NULL, /* get_qos_types */ \
1261 NULL, /* get_qos_capabilities */ \
1262 NULL, /* get_qos */ \
1263 NULL, /* set_qos */ \
1264 NULL, /* get_queue */ \
1265 NULL, /* set_queue */ \
1266 NULL, /* delete_queue */ \
1267 NULL, /* get_queue_stats */ \
1268 NULL, /* queue_dump_start */ \
1269 NULL, /* queue_dump_next */ \
1270 NULL, /* queue_dump_done */ \
1271 NULL, /* dump_queue_stats */ \
1273 NULL, /* get_in4 */ \
1274 NULL, /* set_in4 */ \
1275 NULL, /* get_in6 */ \
1276 NULL, /* add_router */ \
1277 NULL, /* get_next_hop */ \
1279 NULL, /* arp_lookup */ \
1281 netdev_vport_update_flags, \
1283 NULL, /* rx_alloc */ \
1284 NULL, /* rx_construct */ \
1285 NULL, /* rx_destruct */ \
1286 NULL, /* rx_dealloc */ \
1287 NULL, /* rx_recv */ \
1288 NULL, /* rx_wait */ \
1289 NULL, /* rx_drain */
1292 #define TUNNEL_CLASS(NAME, DPIF_PORT, BUILD_HEADER, PUSH_HEADER, POP_HEADER) \
1294 { NAME, VPORT_FUNCTIONS(get_tunnel_config, \
1295 set_tunnel_config, \
1296 get_netdev_tunnel_config, \
1297 tunnel_get_status, \
1298 BUILD_HEADER, PUSH_HEADER, POP_HEADER) }}
1301 netdev_vport_tunnel_register(void)
1303 /* The name of the dpif_port should be short enough to accomodate adding
1304 * a port number to the end if one is necessary. */
1305 static const struct vport_class vport_classes[] = {
1306 TUNNEL_CLASS("geneve", "genev_sys", NULL, NULL, NULL),
1307 TUNNEL_CLASS("gre", "gre_sys", netdev_gre_build_header,
1308 netdev_gre_push_header,
1309 netdev_gre_pop_header),
1310 TUNNEL_CLASS("ipsec_gre", "gre_sys", NULL, NULL, NULL),
1311 TUNNEL_CLASS("gre64", "gre64_sys", NULL, NULL, NULL),
1312 TUNNEL_CLASS("ipsec_gre64", "gre64_sys", NULL, NULL, NULL),
1313 TUNNEL_CLASS("vxlan", "vxlan_sys", netdev_vxlan_build_header,
1314 netdev_vxlan_push_header,
1315 netdev_vxlan_pop_header),
1316 TUNNEL_CLASS("lisp", "lisp_sys", NULL, NULL, NULL)
1318 static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
1320 if (ovsthread_once_start(&once)) {
1323 for (i = 0; i < ARRAY_SIZE(vport_classes); i++) {
1324 netdev_register_provider(&vport_classes[i].netdev_class);
1327 unixctl_command_register("tnl/egress_port_range", "min max", 0, 2,
1328 netdev_vport_range, NULL);
1330 ovsthread_once_done(&once);
1335 netdev_vport_patch_register(void)
1337 static const struct vport_class patch_class =
1339 { "patch", VPORT_FUNCTIONS(get_patch_config,
1342 NULL, NULL, NULL, NULL) }};
1343 netdev_register_provider(&patch_class.netdev_class);