2 * Copyright (c) 2008, 2009, 2010, 2011 Nicira Networks.
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 "dpif-linux.h"
27 #include <linux/types.h>
28 #include <linux/pkt_sched.h>
29 #include <linux/rtnetlink.h>
30 #include <linux/sockios.h>
35 #include "dpif-provider.h"
37 #include "netdev-vport.h"
38 #include "netlink-socket.h"
42 #include "openvswitch/tunnel.h"
44 #include "poll-loop.h"
45 #include "rtnetlink.h"
46 #include "rtnetlink-link.h"
49 #include "unaligned.h"
53 VLOG_DEFINE_THIS_MODULE(dpif_linux);
55 struct dpif_linux_dp {
56 /* Generic Netlink header. */
59 /* struct odp_header. */
63 const char *name; /* ODP_DP_ATTR_NAME. */
64 struct odp_stats stats; /* ODP_DP_ATTR_STATS. */
65 enum odp_frag_handling ipv4_frags; /* ODP_DP_ATTR_IPV4_FRAGS. */
66 const uint32_t *sampling; /* ODP_DP_ATTR_SAMPLING. */
67 uint32_t mcgroups[DPIF_N_UC_TYPES]; /* ODP_DP_ATTR_MCGROUPS. */
70 static void dpif_linux_dp_init(struct dpif_linux_dp *);
71 static int dpif_linux_dp_from_ofpbuf(struct dpif_linux_dp *,
72 const struct ofpbuf *);
73 static void dpif_linux_dp_dump_start(struct nl_dump *);
74 static int dpif_linux_dp_transact(const struct dpif_linux_dp *request,
75 struct dpif_linux_dp *reply,
76 struct ofpbuf **bufp);
77 static int dpif_linux_dp_get(const struct dpif *, struct dpif_linux_dp *reply,
78 struct ofpbuf **bufp);
80 struct dpif_linux_flow {
81 /* Generic Netlink header. */
84 /* struct odp_header. */
85 unsigned int nlmsg_flags;
90 * The 'stats' and 'used' members point to 64-bit data that might only be
91 * aligned on 32-bit boundaries, so get_unaligned_u64() should be used to
92 * access their values. */
93 const struct nlattr *key; /* ODP_FLOW_ATTR_KEY. */
95 const struct nlattr *actions; /* ODP_FLOW_ATTR_ACTIONS. */
97 const struct odp_flow_stats *stats; /* ODP_FLOW_ATTR_STATS. */
98 const uint8_t *tcp_flags; /* ODP_FLOW_ATTR_TCP_FLAGS. */
99 const uint64_t *used; /* ODP_FLOW_ATTR_USED. */
100 bool clear; /* ODP_FLOW_ATTR_CLEAR. */
103 static void dpif_linux_flow_init(struct dpif_linux_flow *);
104 static int dpif_linux_flow_from_ofpbuf(struct dpif_linux_flow *,
105 const struct ofpbuf *);
106 static void dpif_linux_flow_to_ofpbuf(const struct dpif_linux_flow *,
108 static int dpif_linux_flow_transact(const struct dpif_linux_flow *request,
109 struct dpif_linux_flow *reply,
110 struct ofpbuf **bufp);
111 static void dpif_linux_flow_get_stats(const struct dpif_linux_flow *,
112 struct dpif_flow_stats *);
114 /* Datapath interface for the openvswitch Linux kernel module. */
119 /* Multicast group messages. */
120 struct nl_sock *mc_sock;
121 uint32_t mcgroups[DPIF_N_UC_TYPES];
122 unsigned int listen_mask;
124 /* Change notification. */
125 struct shash changed_ports; /* Ports that have changed. */
126 struct rtnetlink_notifier port_notifier;
130 static struct vlog_rate_limit error_rl = VLOG_RATE_LIMIT_INIT(9999, 5);
132 /* Generic Netlink family numbers for ODP. */
133 static int odp_datapath_family;
134 static int odp_vport_family;
135 static int odp_flow_family;
136 static int odp_packet_family;
138 /* Generic Netlink socket. */
139 static struct nl_sock *genl_sock;
141 static int dpif_linux_init(void);
142 static int open_dpif(const struct dpif_linux_dp *, struct dpif **);
143 static void dpif_linux_port_changed(const struct rtnetlink_link_change *,
146 static void dpif_linux_vport_to_ofpbuf(const struct dpif_linux_vport *,
148 static int dpif_linux_vport_from_ofpbuf(struct dpif_linux_vport *,
149 const struct ofpbuf *);
151 static struct dpif_linux *
152 dpif_linux_cast(const struct dpif *dpif)
154 dpif_assert_class(dpif, &dpif_linux_class);
155 return CONTAINER_OF(dpif, struct dpif_linux, dpif);
159 dpif_linux_enumerate(struct svec *all_dps)
165 error = dpif_linux_init();
170 dpif_linux_dp_dump_start(&dump);
171 while (nl_dump_next(&dump, &msg)) {
172 struct dpif_linux_dp dp;
174 if (!dpif_linux_dp_from_ofpbuf(&dp, &msg)) {
175 svec_add(all_dps, dp.name);
178 return nl_dump_done(&dump);
182 dpif_linux_open(const struct dpif_class *class OVS_UNUSED, const char *name,
183 bool create, struct dpif **dpifp)
185 struct dpif_linux_dp dp_request, dp;
189 error = dpif_linux_init();
194 /* Create or look up datapath. */
195 dpif_linux_dp_init(&dp_request);
196 dp_request.cmd = create ? ODP_DP_CMD_NEW : ODP_DP_CMD_GET;
197 dp_request.name = name;
198 error = dpif_linux_dp_transact(&dp_request, &dp, &buf);
202 error = open_dpif(&dp, dpifp);
209 open_dpif(const struct dpif_linux_dp *dp, struct dpif **dpifp)
211 struct dpif_linux *dpif;
215 dpif = xmalloc(sizeof *dpif);
216 error = rtnetlink_link_notifier_register(&dpif->port_notifier,
217 dpif_linux_port_changed, dpif);
222 dpif_init(&dpif->dpif, &dpif_linux_class, dp->name,
223 dp->dp_ifindex, dp->dp_ifindex);
225 dpif->mc_sock = NULL;
226 for (i = 0; i < DPIF_N_UC_TYPES; i++) {
227 dpif->mcgroups[i] = dp->mcgroups[i];
229 dpif->listen_mask = 0;
230 dpif->dp_ifindex = dp->dp_ifindex;
231 shash_init(&dpif->changed_ports);
232 dpif->change_error = false;
233 *dpifp = &dpif->dpif;
243 dpif_linux_close(struct dpif *dpif_)
245 struct dpif_linux *dpif = dpif_linux_cast(dpif_);
246 rtnetlink_link_notifier_unregister(&dpif->port_notifier);
247 shash_destroy(&dpif->changed_ports);
252 dpif_linux_destroy(struct dpif *dpif_)
254 struct dpif_linux *dpif = dpif_linux_cast(dpif_);
255 struct dpif_linux_dp dp;
257 dpif_linux_dp_init(&dp);
258 dp.cmd = ODP_DP_CMD_DEL;
259 dp.dp_ifindex = dpif->dp_ifindex;
260 return dpif_linux_dp_transact(&dp, NULL, NULL);
264 dpif_linux_get_stats(const struct dpif *dpif_, struct odp_stats *stats)
266 struct dpif_linux_dp dp;
270 error = dpif_linux_dp_get(dpif_, &dp, &buf);
279 dpif_linux_get_drop_frags(const struct dpif *dpif_, bool *drop_fragsp)
281 struct dpif_linux_dp dp;
285 error = dpif_linux_dp_get(dpif_, &dp, &buf);
287 *drop_fragsp = dp.ipv4_frags == ODP_DP_FRAG_DROP;
294 dpif_linux_set_drop_frags(struct dpif *dpif_, bool drop_frags)
296 struct dpif_linux *dpif = dpif_linux_cast(dpif_);
297 struct dpif_linux_dp dp;
299 dpif_linux_dp_init(&dp);
300 dp.cmd = ODP_DP_CMD_SET;
301 dp.dp_ifindex = dpif->dp_ifindex;
302 dp.ipv4_frags = drop_frags ? ODP_DP_FRAG_DROP : ODP_DP_FRAG_ZERO;
303 return dpif_linux_dp_transact(&dp, NULL, NULL);
307 dpif_linux_port_add(struct dpif *dpif_, struct netdev *netdev,
310 struct dpif_linux *dpif = dpif_linux_cast(dpif_);
311 const char *name = netdev_get_name(netdev);
312 const char *type = netdev_get_type(netdev);
313 struct dpif_linux_vport request, reply;
314 const struct ofpbuf *options;
318 dpif_linux_vport_init(&request);
319 request.cmd = ODP_VPORT_CMD_NEW;
320 request.dp_ifindex = dpif->dp_ifindex;
321 request.type = netdev_vport_get_vport_type(netdev);
322 if (request.type == ODP_VPORT_TYPE_UNSPEC) {
323 VLOG_WARN_RL(&error_rl, "%s: cannot create port `%s' because it has "
324 "unsupported type `%s'",
325 dpif_name(dpif_), name, type);
330 options = netdev_vport_get_options(netdev);
331 if (options && options->size) {
332 request.options = options->data;
333 request.options_len = options->size;
336 error = dpif_linux_vport_transact(&request, &reply, &buf);
338 *port_nop = reply.port_no;
346 dpif_linux_port_del(struct dpif *dpif_, uint16_t port_no)
348 struct dpif_linux *dpif = dpif_linux_cast(dpif_);
349 struct dpif_linux_vport vport;
351 dpif_linux_vport_init(&vport);
352 vport.cmd = ODP_VPORT_CMD_DEL;
353 vport.dp_ifindex = dpif->dp_ifindex;
354 vport.port_no = port_no;
355 return dpif_linux_vport_transact(&vport, NULL, NULL);
359 dpif_linux_port_query__(const struct dpif *dpif, uint32_t port_no,
360 const char *port_name, struct dpif_port *dpif_port)
362 struct dpif_linux_vport request;
363 struct dpif_linux_vport reply;
367 dpif_linux_vport_init(&request);
368 request.cmd = ODP_VPORT_CMD_GET;
369 request.dp_ifindex = dpif_linux_cast(dpif)->dp_ifindex;
370 request.port_no = port_no;
371 request.name = port_name;
373 error = dpif_linux_vport_transact(&request, &reply, &buf);
375 dpif_port->name = xstrdup(reply.name);
376 dpif_port->type = xstrdup(netdev_vport_get_netdev_type(&reply));
377 dpif_port->port_no = reply.port_no;
384 dpif_linux_port_query_by_number(const struct dpif *dpif, uint16_t port_no,
385 struct dpif_port *dpif_port)
387 return dpif_linux_port_query__(dpif, port_no, NULL, dpif_port);
391 dpif_linux_port_query_by_name(const struct dpif *dpif, const char *devname,
392 struct dpif_port *dpif_port)
394 return dpif_linux_port_query__(dpif, 0, devname, dpif_port);
398 dpif_linux_get_max_ports(const struct dpif *dpif OVS_UNUSED)
400 /* If the datapath increases its range of supported ports, then it should
401 * start reporting that. */
406 dpif_linux_flow_flush(struct dpif *dpif_)
408 struct dpif_linux *dpif = dpif_linux_cast(dpif_);
409 struct dpif_linux_flow flow;
411 dpif_linux_flow_init(&flow);
412 flow.cmd = ODP_FLOW_CMD_DEL;
413 flow.dp_ifindex = dpif->dp_ifindex;
414 return dpif_linux_flow_transact(&flow, NULL, NULL);
417 struct dpif_linux_port_state {
422 dpif_linux_port_dump_start(const struct dpif *dpif_, void **statep)
424 struct dpif_linux *dpif = dpif_linux_cast(dpif_);
425 struct dpif_linux_port_state *state;
426 struct dpif_linux_vport request;
429 *statep = state = xmalloc(sizeof *state);
431 dpif_linux_vport_init(&request);
432 request.cmd = ODP_DP_CMD_GET;
433 request.dp_ifindex = dpif->dp_ifindex;
435 buf = ofpbuf_new(1024);
436 dpif_linux_vport_to_ofpbuf(&request, buf);
437 nl_dump_start(&state->dump, genl_sock, buf);
444 dpif_linux_port_dump_next(const struct dpif *dpif OVS_UNUSED, void *state_,
445 struct dpif_port *dpif_port)
447 struct dpif_linux_port_state *state = state_;
448 struct dpif_linux_vport vport;
452 if (!nl_dump_next(&state->dump, &buf)) {
456 error = dpif_linux_vport_from_ofpbuf(&vport, &buf);
461 dpif_port->name = (char *) vport.name;
462 dpif_port->type = (char *) netdev_vport_get_netdev_type(&vport);
463 dpif_port->port_no = vport.port_no;
468 dpif_linux_port_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
470 struct dpif_linux_port_state *state = state_;
471 int error = nl_dump_done(&state->dump);
477 dpif_linux_port_poll(const struct dpif *dpif_, char **devnamep)
479 struct dpif_linux *dpif = dpif_linux_cast(dpif_);
481 if (dpif->change_error) {
482 dpif->change_error = false;
483 shash_clear(&dpif->changed_ports);
485 } else if (!shash_is_empty(&dpif->changed_ports)) {
486 struct shash_node *node = shash_first(&dpif->changed_ports);
487 *devnamep = shash_steal(&dpif->changed_ports, node);
495 dpif_linux_port_poll_wait(const struct dpif *dpif_)
497 struct dpif_linux *dpif = dpif_linux_cast(dpif_);
498 if (!shash_is_empty(&dpif->changed_ports) || dpif->change_error) {
499 poll_immediate_wake();
501 rtnetlink_link_notifier_wait();
506 dpif_linux_flow_get(const struct dpif *dpif_,
507 const struct nlattr *key, size_t key_len,
508 struct ofpbuf **actionsp, struct dpif_flow_stats *stats)
510 struct dpif_linux *dpif = dpif_linux_cast(dpif_);
511 struct dpif_linux_flow request, reply;
515 dpif_linux_flow_init(&request);
516 request.cmd = ODP_FLOW_CMD_GET;
517 request.dp_ifindex = dpif->dp_ifindex;
519 request.key_len = key_len;
520 error = dpif_linux_flow_transact(&request, &reply, &buf);
523 dpif_linux_flow_get_stats(&reply, stats);
526 buf->data = (void *) reply.actions;
527 buf->size = reply.actions_len;
537 dpif_linux_flow_put(struct dpif *dpif_, enum dpif_flow_put_flags flags,
538 const struct nlattr *key, size_t key_len,
539 const struct nlattr *actions, size_t actions_len,
540 struct dpif_flow_stats *stats)
542 struct dpif_linux *dpif = dpif_linux_cast(dpif_);
543 struct dpif_linux_flow request, reply;
547 dpif_linux_flow_init(&request);
548 request.cmd = flags & DPIF_FP_CREATE ? ODP_FLOW_CMD_NEW : ODP_FLOW_CMD_SET;
549 request.dp_ifindex = dpif->dp_ifindex;
551 request.key_len = key_len;
552 request.actions = actions;
553 request.actions_len = actions_len;
554 if (flags & DPIF_FP_ZERO_STATS) {
555 request.clear = true;
557 request.nlmsg_flags = flags & DPIF_FP_MODIFY ? 0 : NLM_F_CREATE;
558 error = dpif_linux_flow_transact(&request,
559 stats ? &reply : NULL,
560 stats ? &buf : NULL);
561 if (!error && stats) {
562 dpif_linux_flow_get_stats(&reply, stats);
569 dpif_linux_flow_del(struct dpif *dpif_,
570 const struct nlattr *key, size_t key_len,
571 struct dpif_flow_stats *stats)
573 struct dpif_linux *dpif = dpif_linux_cast(dpif_);
574 struct dpif_linux_flow request, reply;
578 dpif_linux_flow_init(&request);
579 request.cmd = ODP_FLOW_CMD_DEL;
580 request.dp_ifindex = dpif->dp_ifindex;
582 request.key_len = key_len;
583 error = dpif_linux_flow_transact(&request,
584 stats ? &reply : NULL,
585 stats ? &buf : NULL);
586 if (!error && stats) {
587 dpif_linux_flow_get_stats(&reply, stats);
593 struct dpif_linux_flow_state {
595 struct dpif_linux_flow flow;
596 struct dpif_flow_stats stats;
600 dpif_linux_flow_dump_start(const struct dpif *dpif_, void **statep)
602 struct dpif_linux *dpif = dpif_linux_cast(dpif_);
603 struct dpif_linux_flow_state *state;
604 struct dpif_linux_flow request;
607 *statep = state = xmalloc(sizeof *state);
609 dpif_linux_flow_init(&request);
610 request.cmd = ODP_DP_CMD_GET;
611 request.dp_ifindex = dpif->dp_ifindex;
613 buf = ofpbuf_new(1024);
614 dpif_linux_flow_to_ofpbuf(&request, buf);
615 nl_dump_start(&state->dump, genl_sock, buf);
622 dpif_linux_flow_dump_next(const struct dpif *dpif_ OVS_UNUSED, void *state_,
623 const struct nlattr **key, size_t *key_len,
624 const struct nlattr **actions, size_t *actions_len,
625 const struct dpif_flow_stats **stats)
627 struct dpif_linux_flow_state *state = state_;
631 if (!nl_dump_next(&state->dump, &buf)) {
635 error = dpif_linux_flow_from_ofpbuf(&state->flow, &buf);
638 *key = state->flow.key;
639 *key_len = state->flow.key_len;
642 *actions = state->flow.actions;
643 *actions_len = state->flow.actions_len;
646 dpif_linux_flow_get_stats(&state->flow, &state->stats);
647 *stats = &state->stats;
654 dpif_linux_flow_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
656 struct dpif_linux_flow_state *state = state_;
657 int error = nl_dump_done(&state->dump);
663 dpif_linux_execute(struct dpif *dpif_,
664 const struct nlattr *actions, size_t actions_len,
665 const struct ofpbuf *packet)
667 struct dpif_linux *dpif = dpif_linux_cast(dpif_);
668 struct odp_header *execute;
672 buf = ofpbuf_new(128 + actions_len + packet->size);
674 nl_msg_put_genlmsghdr(buf, 0, odp_packet_family, NLM_F_REQUEST,
675 ODP_PACKET_CMD_EXECUTE, 1);
677 execute = ofpbuf_put_uninit(buf, sizeof *execute);
678 execute->dp_ifindex = dpif->dp_ifindex;
680 nl_msg_put_unspec(buf, ODP_PACKET_ATTR_PACKET, packet->data, packet->size);
681 nl_msg_put_unspec(buf, ODP_PACKET_ATTR_ACTIONS, actions, actions_len);
683 error = nl_sock_transact(genl_sock, buf, NULL);
689 dpif_linux_recv_get_mask(const struct dpif *dpif_, int *listen_mask)
691 struct dpif_linux *dpif = dpif_linux_cast(dpif_);
692 *listen_mask = dpif->listen_mask;
697 dpif_linux_recv_set_mask(struct dpif *dpif_, int listen_mask)
699 struct dpif_linux *dpif = dpif_linux_cast(dpif_);
703 if (listen_mask == dpif->listen_mask) {
705 } else if (!listen_mask) {
706 nl_sock_destroy(dpif->mc_sock);
707 dpif->mc_sock = NULL;
708 dpif->listen_mask = 0;
710 } else if (!dpif->mc_sock) {
711 error = nl_sock_create(NETLINK_GENERIC, &dpif->mc_sock);
717 /* Unsubscribe from old groups. */
718 for (i = 0; i < DPIF_N_UC_TYPES; i++) {
719 if (dpif->listen_mask & (1u << i)) {
720 nl_sock_leave_mcgroup(dpif->mc_sock, dpif->mcgroups[i]);
724 /* Update listen_mask. */
725 dpif->listen_mask = listen_mask;
727 /* Subscribe to new groups. */
729 for (i = 0; i < DPIF_N_UC_TYPES; i++) {
730 if (dpif->listen_mask & (1u << i)) {
733 retval = nl_sock_join_mcgroup(dpif->mc_sock, dpif->mcgroups[i]);
743 dpif_linux_get_sflow_probability(const struct dpif *dpif_,
744 uint32_t *probability)
746 struct dpif_linux_dp dp;
750 error = dpif_linux_dp_get(dpif_, &dp, &buf);
752 *probability = dp.sampling ? *dp.sampling : 0;
759 dpif_linux_set_sflow_probability(struct dpif *dpif_, uint32_t probability)
761 struct dpif_linux *dpif = dpif_linux_cast(dpif_);
762 struct dpif_linux_dp dp;
764 dpif_linux_dp_init(&dp);
765 dp.cmd = ODP_DP_CMD_SET;
766 dp.dp_ifindex = dpif->dp_ifindex;
767 dp.sampling = &probability;
768 return dpif_linux_dp_transact(&dp, NULL, NULL);
772 dpif_linux_queue_to_priority(const struct dpif *dpif OVS_UNUSED,
773 uint32_t queue_id, uint32_t *priority)
775 if (queue_id < 0xf000) {
776 *priority = TC_H_MAKE(1 << 16, queue_id + 1);
784 parse_odp_packet(struct ofpbuf *buf, struct dpif_upcall *upcall,
787 static const struct nl_policy odp_packet_policy[] = {
788 /* Always present. */
789 [ODP_PACKET_ATTR_PACKET] = { .type = NL_A_UNSPEC,
790 .min_len = ETH_HEADER_LEN },
791 [ODP_PACKET_ATTR_KEY] = { .type = NL_A_NESTED },
793 /* ODP_PACKET_CMD_ACTION only. */
794 [ODP_PACKET_ATTR_USERDATA] = { .type = NL_A_U64, .optional = true },
796 /* ODP_PACKET_CMD_SAMPLE only. */
797 [ODP_PACKET_ATTR_SAMPLE_POOL] = { .type = NL_A_U32, .optional = true },
798 [ODP_PACKET_ATTR_ACTIONS] = { .type = NL_A_NESTED, .optional = true },
801 struct odp_header *odp_header;
802 struct nlattr *a[ARRAY_SIZE(odp_packet_policy)];
803 struct nlmsghdr *nlmsg;
804 struct genlmsghdr *genl;
808 ofpbuf_use_const(&b, buf->data, buf->size);
810 nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg);
811 genl = ofpbuf_try_pull(&b, sizeof *genl);
812 odp_header = ofpbuf_try_pull(&b, sizeof *odp_header);
813 if (!nlmsg || !genl || !odp_header
814 || nlmsg->nlmsg_type != odp_packet_family
815 || !nl_policy_parse(&b, 0, odp_packet_policy, a,
816 ARRAY_SIZE(odp_packet_policy))) {
820 type = (genl->cmd == ODP_PACKET_CMD_MISS ? DPIF_UC_MISS
821 : genl->cmd == ODP_PACKET_CMD_ACTION ? DPIF_UC_ACTION
822 : genl->cmd == ODP_PACKET_CMD_SAMPLE ? DPIF_UC_SAMPLE
828 memset(upcall, 0, sizeof *upcall);
830 upcall->packet = buf;
831 upcall->packet->data = (void *) nl_attr_get(a[ODP_PACKET_ATTR_PACKET]);
832 upcall->packet->size = nl_attr_get_size(a[ODP_PACKET_ATTR_PACKET]);
833 upcall->key = (void *) nl_attr_get(a[ODP_PACKET_ATTR_KEY]);
834 upcall->key_len = nl_attr_get_size(a[ODP_PACKET_ATTR_KEY]);
835 upcall->userdata = (a[ODP_PACKET_ATTR_USERDATA]
836 ? nl_attr_get_u64(a[ODP_PACKET_ATTR_USERDATA])
838 upcall->sample_pool = (a[ODP_PACKET_ATTR_SAMPLE_POOL]
839 ? nl_attr_get_u32(a[ODP_PACKET_ATTR_SAMPLE_POOL])
841 if (a[ODP_PACKET_ATTR_ACTIONS]) {
842 upcall->actions = (void *) nl_attr_get(a[ODP_PACKET_ATTR_ACTIONS]);
843 upcall->actions_len = nl_attr_get_size(a[ODP_PACKET_ATTR_ACTIONS]);
846 *dp_ifindex = odp_header->dp_ifindex;
852 dpif_linux_recv(struct dpif *dpif_, struct dpif_upcall *upcall)
854 struct dpif_linux *dpif = dpif_linux_cast(dpif_);
859 if (!dpif->mc_sock) {
863 for (i = 0; i < 50; i++) {
866 error = nl_sock_recv(dpif->mc_sock, &buf, false);
871 error = parse_odp_packet(buf, upcall, &dp_ifindex);
873 && dp_ifindex == dpif->dp_ifindex
874 && dpif->listen_mask & (1u << upcall->type)) {
888 dpif_linux_recv_wait(struct dpif *dpif_)
890 struct dpif_linux *dpif = dpif_linux_cast(dpif_);
892 nl_sock_wait(dpif->mc_sock, POLLIN);
897 dpif_linux_recv_purge(struct dpif *dpif_)
899 struct dpif_linux *dpif = dpif_linux_cast(dpif_);
902 nl_sock_drain(dpif->mc_sock);
906 const struct dpif_class dpif_linux_class = {
910 dpif_linux_enumerate,
914 dpif_linux_get_stats,
915 dpif_linux_get_drop_frags,
916 dpif_linux_set_drop_frags,
919 dpif_linux_port_query_by_number,
920 dpif_linux_port_query_by_name,
921 dpif_linux_get_max_ports,
922 dpif_linux_port_dump_start,
923 dpif_linux_port_dump_next,
924 dpif_linux_port_dump_done,
925 dpif_linux_port_poll,
926 dpif_linux_port_poll_wait,
930 dpif_linux_flow_flush,
931 dpif_linux_flow_dump_start,
932 dpif_linux_flow_dump_next,
933 dpif_linux_flow_dump_done,
935 dpif_linux_recv_get_mask,
936 dpif_linux_recv_set_mask,
937 dpif_linux_get_sflow_probability,
938 dpif_linux_set_sflow_probability,
939 dpif_linux_queue_to_priority,
941 dpif_linux_recv_wait,
942 dpif_linux_recv_purge,
946 dpif_linux_init(void)
948 static int error = -1;
951 error = nl_lookup_genl_family(ODP_DATAPATH_FAMILY,
952 &odp_datapath_family);
954 VLOG_ERR("Generic Netlink family '%s' does not exist. "
955 "The Open vSwitch kernel module is probably not loaded.",
956 ODP_DATAPATH_FAMILY);
959 error = nl_lookup_genl_family(ODP_VPORT_FAMILY, &odp_vport_family);
962 error = nl_lookup_genl_family(ODP_FLOW_FAMILY, &odp_flow_family);
965 error = nl_lookup_genl_family(ODP_PACKET_FAMILY,
969 error = nl_sock_create(NETLINK_GENERIC, &genl_sock);
977 dpif_linux_is_internal_device(const char *name)
979 struct dpif_linux_vport reply;
983 error = dpif_linux_vport_get(name, &reply, &buf);
986 } else if (error != ENODEV) {
987 VLOG_WARN_RL(&error_rl, "%s: vport query failed (%s)",
988 name, strerror(error));
991 return reply.type == ODP_VPORT_TYPE_INTERNAL;
995 dpif_linux_port_changed(const struct rtnetlink_link_change *change,
998 struct dpif_linux *dpif = dpif_;
1001 if (change->master_ifindex == dpif->dp_ifindex
1002 && (change->nlmsg_type == RTM_NEWLINK
1003 || change->nlmsg_type == RTM_DELLINK))
1005 /* Our datapath changed, either adding a new port or deleting an
1007 shash_add_once(&dpif->changed_ports, change->ifname, NULL);
1010 dpif->change_error = true;
1014 /* Parses the contents of 'buf', which contains a "struct odp_header" followed
1015 * by Netlink attributes, into 'vport'. Returns 0 if successful, otherwise a
1016 * positive errno value.
1018 * 'vport' will contain pointers into 'buf', so the caller should not free
1019 * 'buf' while 'vport' is still in use. */
1021 dpif_linux_vport_from_ofpbuf(struct dpif_linux_vport *vport,
1022 const struct ofpbuf *buf)
1024 static const struct nl_policy odp_vport_policy[] = {
1025 [ODP_VPORT_ATTR_PORT_NO] = { .type = NL_A_U32 },
1026 [ODP_VPORT_ATTR_TYPE] = { .type = NL_A_U32 },
1027 [ODP_VPORT_ATTR_NAME] = { .type = NL_A_STRING, .max_len = IFNAMSIZ },
1028 [ODP_VPORT_ATTR_STATS] = { .type = NL_A_UNSPEC,
1029 .min_len = sizeof(struct rtnl_link_stats64),
1030 .max_len = sizeof(struct rtnl_link_stats64),
1032 [ODP_VPORT_ATTR_ADDRESS] = { .type = NL_A_UNSPEC,
1033 .min_len = ETH_ADDR_LEN,
1034 .max_len = ETH_ADDR_LEN,
1036 [ODP_VPORT_ATTR_MTU] = { .type = NL_A_U32, .optional = true },
1037 [ODP_VPORT_ATTR_OPTIONS] = { .type = NL_A_NESTED, .optional = true },
1038 [ODP_VPORT_ATTR_IFINDEX] = { .type = NL_A_U32, .optional = true },
1039 [ODP_VPORT_ATTR_IFLINK] = { .type = NL_A_U32, .optional = true },
1042 struct nlattr *a[ARRAY_SIZE(odp_vport_policy)];
1043 struct odp_header *odp_header;
1044 struct nlmsghdr *nlmsg;
1045 struct genlmsghdr *genl;
1048 dpif_linux_vport_init(vport);
1050 ofpbuf_use_const(&b, buf->data, buf->size);
1051 nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg);
1052 genl = ofpbuf_try_pull(&b, sizeof *genl);
1053 odp_header = ofpbuf_try_pull(&b, sizeof *odp_header);
1054 if (!nlmsg || !genl || !odp_header
1055 || nlmsg->nlmsg_type != odp_vport_family
1056 || !nl_policy_parse(&b, 0, odp_vport_policy, a,
1057 ARRAY_SIZE(odp_vport_policy))) {
1061 vport->cmd = genl->cmd;
1062 vport->dp_ifindex = odp_header->dp_ifindex;
1063 vport->port_no = nl_attr_get_u32(a[ODP_VPORT_ATTR_PORT_NO]);
1064 vport->type = nl_attr_get_u32(a[ODP_VPORT_ATTR_TYPE]);
1065 vport->name = nl_attr_get_string(a[ODP_VPORT_ATTR_NAME]);
1066 if (a[ODP_VPORT_ATTR_STATS]) {
1067 vport->stats = nl_attr_get(a[ODP_VPORT_ATTR_STATS]);
1069 if (a[ODP_VPORT_ATTR_ADDRESS]) {
1070 vport->address = nl_attr_get(a[ODP_VPORT_ATTR_ADDRESS]);
1072 if (a[ODP_VPORT_ATTR_MTU]) {
1073 vport->mtu = nl_attr_get_u32(a[ODP_VPORT_ATTR_MTU]);
1075 if (a[ODP_VPORT_ATTR_OPTIONS]) {
1076 vport->options = nl_attr_get(a[ODP_VPORT_ATTR_OPTIONS]);
1077 vport->options_len = nl_attr_get_size(a[ODP_VPORT_ATTR_OPTIONS]);
1079 if (a[ODP_VPORT_ATTR_IFINDEX]) {
1080 vport->ifindex = nl_attr_get_u32(a[ODP_VPORT_ATTR_IFINDEX]);
1082 if (a[ODP_VPORT_ATTR_IFLINK]) {
1083 vport->iflink = nl_attr_get_u32(a[ODP_VPORT_ATTR_IFLINK]);
1088 /* Appends to 'buf' (which must initially be empty) a "struct odp_header"
1089 * followed by Netlink attributes corresponding to 'vport'. */
1091 dpif_linux_vport_to_ofpbuf(const struct dpif_linux_vport *vport,
1094 struct odp_header *odp_header;
1096 nl_msg_put_genlmsghdr(buf, 0, odp_vport_family, NLM_F_REQUEST | NLM_F_ECHO,
1099 odp_header = ofpbuf_put_uninit(buf, sizeof *odp_header);
1100 odp_header->dp_ifindex = vport->dp_ifindex;
1102 if (vport->port_no != UINT32_MAX) {
1103 nl_msg_put_u32(buf, ODP_VPORT_ATTR_PORT_NO, vport->port_no);
1106 if (vport->type != ODP_VPORT_TYPE_UNSPEC) {
1107 nl_msg_put_u32(buf, ODP_VPORT_ATTR_TYPE, vport->type);
1111 nl_msg_put_string(buf, ODP_VPORT_ATTR_NAME, vport->name);
1115 nl_msg_put_unspec(buf, ODP_VPORT_ATTR_STATS,
1116 vport->stats, sizeof *vport->stats);
1119 if (vport->address) {
1120 nl_msg_put_unspec(buf, ODP_VPORT_ATTR_ADDRESS,
1121 vport->address, ETH_ADDR_LEN);
1125 nl_msg_put_u32(buf, ODP_VPORT_ATTR_MTU, vport->mtu);
1128 if (vport->options) {
1129 nl_msg_put_nested(buf, ODP_VPORT_ATTR_OPTIONS,
1130 vport->options, vport->options_len);
1133 if (vport->ifindex) {
1134 nl_msg_put_u32(buf, ODP_VPORT_ATTR_IFINDEX, vport->ifindex);
1137 if (vport->iflink) {
1138 nl_msg_put_u32(buf, ODP_VPORT_ATTR_IFLINK, vport->iflink);
1142 /* Clears 'vport' to "empty" values. */
1144 dpif_linux_vport_init(struct dpif_linux_vport *vport)
1146 memset(vport, 0, sizeof *vport);
1147 vport->port_no = UINT32_MAX;
1150 /* Executes 'request' in the kernel datapath. If the command fails, returns a
1151 * positive errno value. Otherwise, if 'reply' and 'bufp' are null, returns 0
1152 * without doing anything else. If 'reply' and 'bufp' are nonnull, then the
1153 * result of the command is expected to be an odp_vport also, which is decoded
1154 * and stored in '*reply' and '*bufp'. The caller must free '*bufp' when the
1155 * reply is no longer needed ('reply' will contain pointers into '*bufp'). */
1157 dpif_linux_vport_transact(const struct dpif_linux_vport *request,
1158 struct dpif_linux_vport *reply,
1159 struct ofpbuf **bufp)
1161 struct ofpbuf *request_buf;
1164 assert((reply != NULL) == (bufp != NULL));
1166 request_buf = ofpbuf_new(1024);
1167 dpif_linux_vport_to_ofpbuf(request, request_buf);
1168 error = nl_sock_transact(genl_sock, request_buf, bufp);
1169 ofpbuf_delete(request_buf);
1173 error = dpif_linux_vport_from_ofpbuf(reply, *bufp);
1176 dpif_linux_vport_init(reply);
1177 ofpbuf_delete(*bufp);
1184 /* Obtains information about the kernel vport named 'name' and stores it into
1185 * '*reply' and '*bufp'. The caller must free '*bufp' when the reply is no
1186 * longer needed ('reply' will contain pointers into '*bufp'). */
1188 dpif_linux_vport_get(const char *name, struct dpif_linux_vport *reply,
1189 struct ofpbuf **bufp)
1191 struct dpif_linux_vport request;
1193 dpif_linux_vport_init(&request);
1194 request.cmd = ODP_VPORT_CMD_GET;
1195 request.name = name;
1197 return dpif_linux_vport_transact(&request, reply, bufp);
1200 /* Parses the contents of 'buf', which contains a "struct odp_header" followed
1201 * by Netlink attributes, into 'dp'. Returns 0 if successful, otherwise a
1202 * positive errno value.
1204 * 'dp' will contain pointers into 'buf', so the caller should not free 'buf'
1205 * while 'dp' is still in use. */
1207 dpif_linux_dp_from_ofpbuf(struct dpif_linux_dp *dp, const struct ofpbuf *buf)
1209 static const struct nl_policy odp_datapath_policy[] = {
1210 [ODP_DP_ATTR_NAME] = { .type = NL_A_STRING, .max_len = IFNAMSIZ },
1211 [ODP_DP_ATTR_STATS] = { .type = NL_A_UNSPEC,
1212 .min_len = sizeof(struct odp_stats),
1213 .max_len = sizeof(struct odp_stats),
1215 [ODP_DP_ATTR_IPV4_FRAGS] = { .type = NL_A_U32, .optional = true },
1216 [ODP_DP_ATTR_SAMPLING] = { .type = NL_A_U32, .optional = true },
1217 [ODP_DP_ATTR_MCGROUPS] = { .type = NL_A_NESTED, .optional = true },
1220 struct nlattr *a[ARRAY_SIZE(odp_datapath_policy)];
1221 struct odp_header *odp_header;
1222 struct nlmsghdr *nlmsg;
1223 struct genlmsghdr *genl;
1226 dpif_linux_dp_init(dp);
1228 ofpbuf_use_const(&b, buf->data, buf->size);
1229 nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg);
1230 genl = ofpbuf_try_pull(&b, sizeof *genl);
1231 odp_header = ofpbuf_try_pull(&b, sizeof *odp_header);
1232 if (!nlmsg || !genl || !odp_header
1233 || nlmsg->nlmsg_type != odp_datapath_family
1234 || !nl_policy_parse(&b, 0, odp_datapath_policy, a,
1235 ARRAY_SIZE(odp_datapath_policy))) {
1239 dp->cmd = genl->cmd;
1240 dp->dp_ifindex = odp_header->dp_ifindex;
1241 dp->name = nl_attr_get_string(a[ODP_DP_ATTR_NAME]);
1242 if (a[ODP_DP_ATTR_STATS]) {
1243 /* Can't use structure assignment because Netlink doesn't ensure
1244 * sufficient alignment for 64-bit members. */
1245 memcpy(&dp->stats, nl_attr_get(a[ODP_DP_ATTR_STATS]),
1248 if (a[ODP_DP_ATTR_IPV4_FRAGS]) {
1249 dp->ipv4_frags = nl_attr_get_u32(a[ODP_DP_ATTR_IPV4_FRAGS]);
1251 if (a[ODP_DP_ATTR_SAMPLING]) {
1252 dp->sampling = nl_attr_get(a[ODP_DP_ATTR_SAMPLING]);
1255 if (a[ODP_DP_ATTR_MCGROUPS]) {
1256 static const struct nl_policy odp_mcgroup_policy[] = {
1257 [ODP_PACKET_CMD_MISS] = { .type = NL_A_U32, .optional = true },
1258 [ODP_PACKET_CMD_ACTION] = { .type = NL_A_U32, .optional = true },
1259 [ODP_PACKET_CMD_SAMPLE] = { .type = NL_A_U32, .optional = true },
1262 struct nlattr *mcgroups[ARRAY_SIZE(odp_mcgroup_policy)];
1264 if (!nl_parse_nested(a[ODP_DP_ATTR_MCGROUPS], odp_mcgroup_policy,
1265 mcgroups, ARRAY_SIZE(odp_mcgroup_policy))) {
1269 if (mcgroups[ODP_PACKET_CMD_MISS]) {
1270 dp->mcgroups[DPIF_UC_MISS]
1271 = nl_attr_get_u32(mcgroups[ODP_PACKET_CMD_MISS]);
1273 if (mcgroups[ODP_PACKET_CMD_ACTION]) {
1274 dp->mcgroups[DPIF_UC_ACTION]
1275 = nl_attr_get_u32(mcgroups[ODP_PACKET_CMD_ACTION]);
1277 if (mcgroups[ODP_PACKET_CMD_SAMPLE]) {
1278 dp->mcgroups[DPIF_UC_SAMPLE]
1279 = nl_attr_get_u32(mcgroups[ODP_PACKET_CMD_SAMPLE]);
1286 /* Appends to 'buf' the Generic Netlink message described by 'dp'. */
1288 dpif_linux_dp_to_ofpbuf(const struct dpif_linux_dp *dp, struct ofpbuf *buf)
1290 struct odp_header *odp_header;
1292 nl_msg_put_genlmsghdr(buf, 0, odp_datapath_family,
1293 NLM_F_REQUEST | NLM_F_ECHO, dp->cmd, 1);
1295 odp_header = ofpbuf_put_uninit(buf, sizeof *odp_header);
1296 odp_header->dp_ifindex = dp->dp_ifindex;
1299 nl_msg_put_string(buf, ODP_DP_ATTR_NAME, dp->name);
1302 /* Skip ODP_DP_ATTR_STATS since we never have a reason to serialize it. */
1304 if (dp->ipv4_frags) {
1305 nl_msg_put_u32(buf, ODP_DP_ATTR_IPV4_FRAGS, dp->ipv4_frags);
1309 nl_msg_put_u32(buf, ODP_DP_ATTR_SAMPLING, *dp->sampling);
1313 /* Clears 'dp' to "empty" values. */
1315 dpif_linux_dp_init(struct dpif_linux_dp *dp)
1317 memset(dp, 0, sizeof *dp);
1321 dpif_linux_dp_dump_start(struct nl_dump *dump)
1323 struct dpif_linux_dp request;
1326 dpif_linux_dp_init(&request);
1327 request.cmd = ODP_DP_CMD_GET;
1329 buf = ofpbuf_new(1024);
1330 dpif_linux_dp_to_ofpbuf(&request, buf);
1331 nl_dump_start(dump, genl_sock, buf);
1335 /* Executes 'request' in the kernel datapath. If the command fails, returns a
1336 * positive errno value. Otherwise, if 'reply' and 'bufp' are null, returns 0
1337 * without doing anything else. If 'reply' and 'bufp' are nonnull, then the
1338 * result of the command is expected to be of the same form, which is decoded
1339 * and stored in '*reply' and '*bufp'. The caller must free '*bufp' when the
1340 * reply is no longer needed ('reply' will contain pointers into '*bufp'). */
1342 dpif_linux_dp_transact(const struct dpif_linux_dp *request,
1343 struct dpif_linux_dp *reply, struct ofpbuf **bufp)
1345 struct ofpbuf *request_buf;
1348 assert((reply != NULL) == (bufp != NULL));
1350 request_buf = ofpbuf_new(1024);
1351 dpif_linux_dp_to_ofpbuf(request, request_buf);
1352 error = nl_sock_transact(genl_sock, request_buf, bufp);
1353 ofpbuf_delete(request_buf);
1357 error = dpif_linux_dp_from_ofpbuf(reply, *bufp);
1360 dpif_linux_dp_init(reply);
1361 ofpbuf_delete(*bufp);
1368 /* Obtains information about 'dpif_' and stores it into '*reply' and '*bufp'.
1369 * The caller must free '*bufp' when the reply is no longer needed ('reply'
1370 * will contain pointers into '*bufp'). */
1372 dpif_linux_dp_get(const struct dpif *dpif_, struct dpif_linux_dp *reply,
1373 struct ofpbuf **bufp)
1375 struct dpif_linux *dpif = dpif_linux_cast(dpif_);
1376 struct dpif_linux_dp request;
1378 dpif_linux_dp_init(&request);
1379 request.cmd = ODP_DP_CMD_GET;
1380 request.dp_ifindex = dpif->dp_ifindex;
1382 return dpif_linux_dp_transact(&request, reply, bufp);
1385 /* Parses the contents of 'buf', which contains a "struct odp_header" followed
1386 * by Netlink attributes, into 'flow'. Returns 0 if successful, otherwise a
1387 * positive errno value.
1389 * 'flow' will contain pointers into 'buf', so the caller should not free 'buf'
1390 * while 'flow' is still in use. */
1392 dpif_linux_flow_from_ofpbuf(struct dpif_linux_flow *flow,
1393 const struct ofpbuf *buf)
1395 static const struct nl_policy odp_flow_policy[] = {
1396 [ODP_FLOW_ATTR_KEY] = { .type = NL_A_NESTED },
1397 [ODP_FLOW_ATTR_ACTIONS] = { .type = NL_A_NESTED, .optional = true },
1398 [ODP_FLOW_ATTR_STATS] = { .type = NL_A_UNSPEC,
1399 .min_len = sizeof(struct odp_flow_stats),
1400 .max_len = sizeof(struct odp_flow_stats),
1402 [ODP_FLOW_ATTR_TCP_FLAGS] = { .type = NL_A_U8, .optional = true },
1403 [ODP_FLOW_ATTR_USED] = { .type = NL_A_U64, .optional = true },
1404 /* The kernel never uses ODP_FLOW_ATTR_CLEAR. */
1407 struct nlattr *a[ARRAY_SIZE(odp_flow_policy)];
1408 struct odp_header *odp_header;
1409 struct nlmsghdr *nlmsg;
1410 struct genlmsghdr *genl;
1413 dpif_linux_flow_init(flow);
1415 ofpbuf_use_const(&b, buf->data, buf->size);
1416 nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg);
1417 genl = ofpbuf_try_pull(&b, sizeof *genl);
1418 odp_header = ofpbuf_try_pull(&b, sizeof *odp_header);
1419 if (!nlmsg || !genl || !odp_header
1420 || nlmsg->nlmsg_type != odp_flow_family
1421 || !nl_policy_parse(&b, 0, odp_flow_policy, a,
1422 ARRAY_SIZE(odp_flow_policy))) {
1426 flow->nlmsg_flags = nlmsg->nlmsg_flags;
1427 flow->dp_ifindex = odp_header->dp_ifindex;
1428 flow->key = nl_attr_get(a[ODP_FLOW_ATTR_KEY]);
1429 flow->key_len = nl_attr_get_size(a[ODP_FLOW_ATTR_KEY]);
1430 if (a[ODP_FLOW_ATTR_ACTIONS]) {
1431 flow->actions = nl_attr_get(a[ODP_FLOW_ATTR_ACTIONS]);
1432 flow->actions_len = nl_attr_get_size(a[ODP_FLOW_ATTR_ACTIONS]);
1434 if (a[ODP_FLOW_ATTR_STATS]) {
1435 flow->stats = nl_attr_get(a[ODP_FLOW_ATTR_STATS]);
1437 if (a[ODP_FLOW_ATTR_TCP_FLAGS]) {
1438 flow->tcp_flags = nl_attr_get(a[ODP_FLOW_ATTR_TCP_FLAGS]);
1440 if (a[ODP_FLOW_ATTR_USED]) {
1441 flow->used = nl_attr_get(a[ODP_FLOW_ATTR_USED]);
1446 /* Appends to 'buf' (which must initially be empty) a "struct odp_header"
1447 * followed by Netlink attributes corresponding to 'flow'. */
1449 dpif_linux_flow_to_ofpbuf(const struct dpif_linux_flow *flow,
1452 struct odp_header *odp_header;
1454 nl_msg_put_genlmsghdr(buf, 0, odp_flow_family,
1455 NLM_F_REQUEST | NLM_F_ECHO | flow->nlmsg_flags,
1458 odp_header = ofpbuf_put_uninit(buf, sizeof *odp_header);
1459 odp_header->dp_ifindex = flow->dp_ifindex;
1461 if (flow->key_len) {
1462 nl_msg_put_unspec(buf, ODP_FLOW_ATTR_KEY, flow->key, flow->key_len);
1465 if (flow->actions_len) {
1466 nl_msg_put_unspec(buf, ODP_FLOW_ATTR_ACTIONS,
1467 flow->actions, flow->actions_len);
1470 /* We never need to send these to the kernel. */
1471 assert(!flow->stats);
1472 assert(!flow->tcp_flags);
1473 assert(!flow->used);
1476 nl_msg_put_flag(buf, ODP_FLOW_ATTR_CLEAR);
1480 /* Clears 'flow' to "empty" values. */
1482 dpif_linux_flow_init(struct dpif_linux_flow *flow)
1484 memset(flow, 0, sizeof *flow);
1487 /* Executes 'request' in the kernel datapath. If the command fails, returns a
1488 * positive errno value. Otherwise, if 'reply' and 'bufp' are null, returns 0
1489 * without doing anything else. If 'reply' and 'bufp' are nonnull, then the
1490 * result of the command is expected to be a flow also, which is decoded and
1491 * stored in '*reply' and '*bufp'. The caller must free '*bufp' when the reply
1492 * is no longer needed ('reply' will contain pointers into '*bufp'). */
1494 dpif_linux_flow_transact(const struct dpif_linux_flow *request,
1495 struct dpif_linux_flow *reply, struct ofpbuf **bufp)
1497 struct ofpbuf *request_buf;
1500 assert((reply != NULL) == (bufp != NULL));
1502 request_buf = ofpbuf_new(1024);
1503 dpif_linux_flow_to_ofpbuf(request, request_buf);
1504 error = nl_sock_transact(genl_sock, request_buf, bufp);
1505 ofpbuf_delete(request_buf);
1509 error = dpif_linux_flow_from_ofpbuf(reply, *bufp);
1512 dpif_linux_flow_init(reply);
1513 ofpbuf_delete(*bufp);
1521 dpif_linux_flow_get_stats(const struct dpif_linux_flow *flow,
1522 struct dpif_flow_stats *stats)
1525 stats->n_packets = get_unaligned_u64(&flow->stats->n_packets);
1526 stats->n_bytes = get_unaligned_u64(&flow->stats->n_bytes);
1528 stats->n_packets = 0;
1531 stats->used = flow->used ? get_unaligned_u64(flow->used) : 0;
1532 stats->tcp_flags = flow->tcp_flags ? *flow->tcp_flags : 0;