2 * Copyright (c) 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.
25 #include <netinet/in.h>
26 #include <sys/socket.h>
31 #include <sys/ioctl.h>
37 #include "dpif-provider.h"
39 #include "dynamic-string.h"
46 #include "ofp-print.h"
49 #include "poll-loop.h"
55 VLOG_DEFINE_THIS_MODULE(dpif_netdev);
57 /* Configuration parameters. */
58 enum { MAX_PORTS = 256 }; /* Maximum number of ports. */
59 enum { MAX_FLOWS = 65536 }; /* Maximum number of flows in flow table. */
61 /* Enough headroom to add a vlan tag, plus an extra 2 bytes to allow IP
62 * headers to be aligned on a 4-byte boundary. */
63 enum { DP_NETDEV_HEADROOM = 2 + VLAN_HEADER_LEN };
66 enum { N_QUEUES = 2 }; /* Number of queues for dpif_recv(). */
67 enum { MAX_QUEUE_LEN = 128 }; /* Maximum number of packets per queue. */
68 enum { QUEUE_MASK = MAX_QUEUE_LEN - 1 };
69 BUILD_ASSERT_DECL(IS_POW2(MAX_QUEUE_LEN));
71 struct dp_netdev_queue {
72 struct dpif_upcall *upcalls[MAX_QUEUE_LEN];
73 unsigned int head, tail;
76 /* Datapath based on the network device interface from netdev.h. */
78 const struct dpif_class *class;
83 bool drop_frags; /* Drop all IP fragments, if true. */
84 struct dp_netdev_queue queues[N_QUEUES];
85 struct hmap flow_table; /* Flow table. */
88 long long int n_frags; /* Number of dropped IP fragments. */
89 long long int n_hit; /* Number of flow table matches. */
90 long long int n_missed; /* Number of flow table misses. */
91 long long int n_lost; /* Number of misses not passed to client. */
95 struct dp_netdev_port *ports[MAX_PORTS];
96 struct list port_list;
100 /* A port in a netdev-based datapath. */
101 struct dp_netdev_port {
102 int port_no; /* Index into dp_netdev's 'ports'. */
103 struct list node; /* Element in dp_netdev's 'port_list'. */
104 struct netdev *netdev;
105 bool internal; /* Internal port? */
108 /* A flow in dp_netdev's 'flow_table'. */
109 struct dp_netdev_flow {
110 struct hmap_node node; /* Element in dp_netdev's 'flow_table'. */
114 long long int used; /* Last used time, in monotonic msecs. */
115 long long int packet_count; /* Number of packets matched. */
116 long long int byte_count; /* Number of bytes matched. */
117 ovs_be16 tcp_ctl; /* Bitwise-OR of seen tcp_ctl values. */
120 struct nlattr *actions;
124 /* Interface to netdev-based datapath. */
127 struct dp_netdev *dp;
129 unsigned int dp_serial;
132 /* All netdev-based datapaths. */
133 static struct shash dp_netdevs = SHASH_INITIALIZER(&dp_netdevs);
135 /* Maximum port MTU seen so far. */
136 static int max_mtu = ETH_PAYLOAD_MAX;
138 static int get_port_by_number(struct dp_netdev *, uint16_t port_no,
139 struct dp_netdev_port **portp);
140 static int get_port_by_name(struct dp_netdev *, const char *devname,
141 struct dp_netdev_port **portp);
142 static void dp_netdev_free(struct dp_netdev *);
143 static void dp_netdev_flow_flush(struct dp_netdev *);
144 static int do_add_port(struct dp_netdev *, const char *devname,
145 const char *type, uint16_t port_no);
146 static int do_del_port(struct dp_netdev *, uint16_t port_no);
147 static int dpif_netdev_open(const struct dpif_class *, const char *name,
148 bool create, struct dpif **);
149 static int dp_netdev_output_userspace(struct dp_netdev *, const struct ofpbuf *,
150 int queue_no, const struct flow *,
152 static int dp_netdev_execute_actions(struct dp_netdev *,
153 struct ofpbuf *, struct flow *,
154 const struct nlattr *actions,
157 static struct dpif_class dpif_dummy_class;
159 static struct dpif_netdev *
160 dpif_netdev_cast(const struct dpif *dpif)
162 assert(dpif->dpif_class->open == dpif_netdev_open);
163 return CONTAINER_OF(dpif, struct dpif_netdev, dpif);
166 static struct dp_netdev *
167 get_dp_netdev(const struct dpif *dpif)
169 return dpif_netdev_cast(dpif)->dp;
173 create_dpif_netdev(struct dp_netdev *dp)
175 uint16_t netflow_id = hash_string(dp->name, 0);
176 struct dpif_netdev *dpif;
180 dpif = xmalloc(sizeof *dpif);
181 dpif_init(&dpif->dpif, dp->class, dp->name, netflow_id >> 8, netflow_id);
183 dpif->listen_mask = 0;
184 dpif->dp_serial = dp->serial;
190 create_dp_netdev(const char *name, const struct dpif_class *class,
191 struct dp_netdev **dpp)
193 struct dp_netdev *dp;
197 dp = xzalloc(sizeof *dp);
199 dp->name = xstrdup(name);
201 dp->drop_frags = false;
202 for (i = 0; i < N_QUEUES; i++) {
203 dp->queues[i].head = dp->queues[i].tail = 0;
205 hmap_init(&dp->flow_table);
206 list_init(&dp->port_list);
207 error = do_add_port(dp, name, "internal", ODPP_LOCAL);
213 shash_add(&dp_netdevs, name, dp);
220 dpif_netdev_open(const struct dpif_class *class, const char *name,
221 bool create, struct dpif **dpifp)
223 struct dp_netdev *dp;
225 dp = shash_find_data(&dp_netdevs, name);
230 int error = create_dp_netdev(name, class, &dp);
237 if (dp->class != class) {
244 *dpifp = create_dpif_netdev(dp);
249 dp_netdev_purge_queues(struct dp_netdev *dp)
253 for (i = 0; i < N_QUEUES; i++) {
254 struct dp_netdev_queue *q = &dp->queues[i];
256 while (q->tail != q->head) {
257 struct dpif_upcall *upcall = q->upcalls[q->tail++ & QUEUE_MASK];
259 ofpbuf_delete(upcall->packet);
266 dp_netdev_free(struct dp_netdev *dp)
268 dp_netdev_flow_flush(dp);
269 while (dp->n_ports > 0) {
270 struct dp_netdev_port *port = CONTAINER_OF(
271 dp->port_list.next, struct dp_netdev_port, node);
272 do_del_port(dp, port->port_no);
274 dp_netdev_purge_queues(dp);
275 hmap_destroy(&dp->flow_table);
281 dpif_netdev_close(struct dpif *dpif)
283 struct dp_netdev *dp = get_dp_netdev(dpif);
284 assert(dp->open_cnt > 0);
285 if (--dp->open_cnt == 0 && dp->destroyed) {
286 shash_find_and_delete(&dp_netdevs, dp->name);
293 dpif_netdev_destroy(struct dpif *dpif)
295 struct dp_netdev *dp = get_dp_netdev(dpif);
296 dp->destroyed = true;
301 dpif_netdev_get_stats(const struct dpif *dpif, struct odp_stats *stats)
303 struct dp_netdev *dp = get_dp_netdev(dpif);
304 memset(stats, 0, sizeof *stats);
305 stats->n_flows = hmap_count(&dp->flow_table);
306 stats->n_frags = dp->n_frags;
307 stats->n_hit = dp->n_hit;
308 stats->n_missed = dp->n_missed;
309 stats->n_lost = dp->n_lost;
314 dpif_netdev_get_drop_frags(const struct dpif *dpif, bool *drop_fragsp)
316 struct dp_netdev *dp = get_dp_netdev(dpif);
317 *drop_fragsp = dp->drop_frags;
322 dpif_netdev_set_drop_frags(struct dpif *dpif, bool drop_frags)
324 struct dp_netdev *dp = get_dp_netdev(dpif);
325 dp->drop_frags = drop_frags;
330 do_add_port(struct dp_netdev *dp, const char *devname, const char *type,
333 struct dp_netdev_port *port;
334 struct netdev_options netdev_options;
335 struct netdev *netdev;
340 /* XXX reject devices already in some dp_netdev. */
341 if (type[0] == '\0' || !strcmp(type, "system")) {
343 } else if (!strcmp(type, "internal")) {
346 VLOG_WARN("%s: unsupported port type %s", devname, type);
350 /* Open and validate network device. */
351 memset(&netdev_options, 0, sizeof netdev_options);
352 netdev_options.name = devname;
353 if (dp->class == &dpif_dummy_class) {
354 netdev_options.type = "dummy";
355 } else if (internal) {
356 netdev_options.type = "tap";
359 error = netdev_open(&netdev_options, &netdev);
363 /* XXX reject loopback devices */
364 /* XXX reject non-Ethernet devices */
366 error = netdev_listen(netdev);
368 VLOG_ERR("%s: cannot receive packets on this network device (%s)",
369 devname, strerror(errno));
370 netdev_close(netdev);
374 error = netdev_turn_flags_on(netdev, NETDEV_PROMISC, false);
376 netdev_close(netdev);
380 port = xmalloc(sizeof *port);
381 port->port_no = port_no;
382 port->netdev = netdev;
383 port->internal = internal;
385 netdev_get_mtu(netdev, &mtu);
386 if (mtu != INT_MAX && mtu > max_mtu) {
390 list_push_back(&dp->port_list, &port->node);
391 dp->ports[port_no] = port;
399 dpif_netdev_port_add(struct dpif *dpif, struct netdev *netdev,
402 struct dp_netdev *dp = get_dp_netdev(dpif);
405 for (port_no = 0; port_no < MAX_PORTS; port_no++) {
406 if (!dp->ports[port_no]) {
408 return do_add_port(dp, netdev_get_name(netdev),
409 netdev_get_type(netdev), port_no);
416 dpif_netdev_port_del(struct dpif *dpif, uint16_t port_no)
418 struct dp_netdev *dp = get_dp_netdev(dpif);
419 return port_no == ODPP_LOCAL ? EINVAL : do_del_port(dp, port_no);
423 is_valid_port_number(uint16_t port_no)
425 return port_no < MAX_PORTS;
429 get_port_by_number(struct dp_netdev *dp,
430 uint16_t port_no, struct dp_netdev_port **portp)
432 if (!is_valid_port_number(port_no)) {
436 *portp = dp->ports[port_no];
437 return *portp ? 0 : ENOENT;
442 get_port_by_name(struct dp_netdev *dp,
443 const char *devname, struct dp_netdev_port **portp)
445 struct dp_netdev_port *port;
447 LIST_FOR_EACH (port, node, &dp->port_list) {
448 if (!strcmp(netdev_get_name(port->netdev), devname)) {
457 do_del_port(struct dp_netdev *dp, uint16_t port_no)
459 struct dp_netdev_port *port;
463 error = get_port_by_number(dp, port_no, &port);
468 list_remove(&port->node);
469 dp->ports[port->port_no] = NULL;
473 name = xstrdup(netdev_get_name(port->netdev));
474 netdev_close(port->netdev);
483 answer_port_query(const struct dp_netdev_port *port,
484 struct dpif_port *dpif_port)
486 dpif_port->name = xstrdup(netdev_get_name(port->netdev));
487 dpif_port->type = xstrdup(port->internal ? "internal" : "system");
488 dpif_port->port_no = port->port_no;
492 dpif_netdev_port_query_by_number(const struct dpif *dpif, uint16_t port_no,
493 struct dpif_port *dpif_port)
495 struct dp_netdev *dp = get_dp_netdev(dpif);
496 struct dp_netdev_port *port;
499 error = get_port_by_number(dp, port_no, &port);
501 answer_port_query(port, dpif_port);
507 dpif_netdev_port_query_by_name(const struct dpif *dpif, const char *devname,
508 struct dpif_port *dpif_port)
510 struct dp_netdev *dp = get_dp_netdev(dpif);
511 struct dp_netdev_port *port;
514 error = get_port_by_name(dp, devname, &port);
516 answer_port_query(port, dpif_port);
522 dpif_netdev_get_max_ports(const struct dpif *dpif OVS_UNUSED)
528 dp_netdev_free_flow(struct dp_netdev *dp, struct dp_netdev_flow *flow)
530 hmap_remove(&dp->flow_table, &flow->node);
536 dp_netdev_flow_flush(struct dp_netdev *dp)
538 struct dp_netdev_flow *flow, *next;
540 HMAP_FOR_EACH_SAFE (flow, next, node, &dp->flow_table) {
541 dp_netdev_free_flow(dp, flow);
546 dpif_netdev_flow_flush(struct dpif *dpif)
548 struct dp_netdev *dp = get_dp_netdev(dpif);
549 dp_netdev_flow_flush(dp);
553 struct dp_netdev_port_state {
559 dpif_netdev_port_dump_start(const struct dpif *dpif OVS_UNUSED, void **statep)
561 *statep = xzalloc(sizeof(struct dp_netdev_port_state));
566 dpif_netdev_port_dump_next(const struct dpif *dpif, void *state_,
567 struct dpif_port *dpif_port)
569 struct dp_netdev_port_state *state = state_;
570 struct dp_netdev *dp = get_dp_netdev(dpif);
573 for (port_no = state->port_no; port_no < MAX_PORTS; port_no++) {
574 struct dp_netdev_port *port = dp->ports[port_no];
577 state->name = xstrdup(netdev_get_name(port->netdev));
578 dpif_port->name = state->name;
579 dpif_port->type = port->internal ? "internal" : "system";
580 dpif_port->port_no = port->port_no;
581 state->port_no = port_no + 1;
589 dpif_netdev_port_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
591 struct dp_netdev_port_state *state = state_;
598 dpif_netdev_port_poll(const struct dpif *dpif_, char **devnamep OVS_UNUSED)
600 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
601 if (dpif->dp_serial != dpif->dp->serial) {
602 dpif->dp_serial = dpif->dp->serial;
610 dpif_netdev_port_poll_wait(const struct dpif *dpif_)
612 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
613 if (dpif->dp_serial != dpif->dp->serial) {
614 poll_immediate_wake();
618 static struct dp_netdev_flow *
619 dp_netdev_lookup_flow(const struct dp_netdev *dp, const struct flow *key)
621 struct dp_netdev_flow *flow;
623 HMAP_FOR_EACH_WITH_HASH (flow, node, flow_hash(key, 0), &dp->flow_table) {
624 if (flow_equal(&flow->key, key)) {
632 get_dpif_flow_stats(struct dp_netdev_flow *flow, struct dpif_flow_stats *stats)
634 stats->n_packets = flow->packet_count;
635 stats->n_bytes = flow->byte_count;
636 stats->used = flow->used;
637 stats->tcp_flags = TCP_FLAGS(flow->tcp_ctl);
641 dpif_netdev_flow_from_nlattrs(const struct nlattr *key, uint32_t key_len,
644 if (odp_flow_key_to_flow(key, key_len, flow)) {
645 /* This should not happen: it indicates that odp_flow_key_from_flow()
646 * and odp_flow_key_to_flow() disagree on the acceptable form of a
647 * flow. Log the problem as an error, with enough details to enable
649 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
651 if (!VLOG_DROP_ERR(&rl)) {
655 odp_flow_key_format(key, key_len, &s);
656 VLOG_ERR("internal error parsing flow key %s", ds_cstr(&s));
667 dpif_netdev_flow_get(const struct dpif *dpif,
668 const struct nlattr *nl_key, size_t nl_key_len,
669 struct ofpbuf **actionsp, struct dpif_flow_stats *stats)
671 struct dp_netdev *dp = get_dp_netdev(dpif);
672 struct dp_netdev_flow *flow;
676 error = dpif_netdev_flow_from_nlattrs(nl_key, nl_key_len, &key);
681 flow = dp_netdev_lookup_flow(dp, &key);
687 get_dpif_flow_stats(flow, stats);
690 *actionsp = ofpbuf_clone_data(flow->actions, flow->actions_len);
696 dpif_netdev_validate_actions(const struct nlattr *actions,
697 size_t actions_len, bool *mutates)
699 const struct nlattr *a;
703 NL_ATTR_FOR_EACH (a, left, actions, actions_len) {
704 uint16_t type = nl_attr_type(a);
705 int len = odp_action_len(type);
707 if (len != nl_attr_get_size(a)) {
712 case ODP_ACTION_ATTR_OUTPUT:
713 if (nl_attr_get_u32(a) >= MAX_PORTS) {
718 case ODP_ACTION_ATTR_USERSPACE:
721 case ODP_ACTION_ATTR_SET_DL_TCI:
723 if (nl_attr_get_be16(a) & htons(VLAN_CFI)) {
728 case ODP_ACTION_ATTR_SET_NW_TOS:
730 if (nl_attr_get_u8(a) & IP_ECN_MASK) {
735 case ODP_ACTION_ATTR_STRIP_VLAN:
736 case ODP_ACTION_ATTR_SET_DL_SRC:
737 case ODP_ACTION_ATTR_SET_DL_DST:
738 case ODP_ACTION_ATTR_SET_NW_SRC:
739 case ODP_ACTION_ATTR_SET_NW_DST:
740 case ODP_ACTION_ATTR_SET_TP_SRC:
741 case ODP_ACTION_ATTR_SET_TP_DST:
745 case ODP_ACTION_ATTR_SET_TUNNEL:
746 case ODP_ACTION_ATTR_SET_PRIORITY:
747 case ODP_ACTION_ATTR_POP_PRIORITY:
756 set_flow_actions(struct dp_netdev_flow *flow,
757 const struct nlattr *actions, size_t actions_len)
762 error = dpif_netdev_validate_actions(actions, actions_len, &mutates);
767 flow->actions = xrealloc(flow->actions, actions_len);
768 flow->actions_len = actions_len;
769 memcpy(flow->actions, actions, actions_len);
774 add_flow(struct dpif *dpif, const struct flow *key,
775 const struct nlattr *actions, size_t actions_len)
777 struct dp_netdev *dp = get_dp_netdev(dpif);
778 struct dp_netdev_flow *flow;
781 flow = xzalloc(sizeof *flow);
784 error = set_flow_actions(flow, actions, actions_len);
790 hmap_insert(&dp->flow_table, &flow->node, flow_hash(&flow->key, 0));
795 clear_stats(struct dp_netdev_flow *flow)
798 flow->packet_count = 0;
799 flow->byte_count = 0;
804 dpif_netdev_flow_put(struct dpif *dpif, enum dpif_flow_put_flags flags,
805 const struct nlattr *nl_key, size_t nl_key_len,
806 const struct nlattr *actions, size_t actions_len,
807 struct dpif_flow_stats *stats)
809 struct dp_netdev *dp = get_dp_netdev(dpif);
810 struct dp_netdev_flow *flow;
814 error = dpif_netdev_flow_from_nlattrs(nl_key, nl_key_len, &key);
819 flow = dp_netdev_lookup_flow(dp, &key);
821 if (flags & DPIF_FP_CREATE) {
822 if (hmap_count(&dp->flow_table) < MAX_FLOWS) {
824 memset(stats, 0, sizeof *stats);
826 return add_flow(dpif, &key, actions, actions_len);
834 if (flags & DPIF_FP_MODIFY) {
835 int error = set_flow_actions(flow, actions, actions_len);
838 get_dpif_flow_stats(flow, stats);
840 if (flags & DPIF_FP_ZERO_STATS) {
852 dpif_netdev_flow_del(struct dpif *dpif,
853 const struct nlattr *nl_key, size_t nl_key_len,
854 struct dpif_flow_stats *stats)
856 struct dp_netdev *dp = get_dp_netdev(dpif);
857 struct dp_netdev_flow *flow;
861 error = dpif_netdev_flow_from_nlattrs(nl_key, nl_key_len, &key);
866 flow = dp_netdev_lookup_flow(dp, &key);
869 get_dpif_flow_stats(flow, stats);
871 dp_netdev_free_flow(dp, flow);
878 struct dp_netdev_flow_state {
881 struct nlattr *actions;
882 struct odputil_keybuf keybuf;
883 struct dpif_flow_stats stats;
887 dpif_netdev_flow_dump_start(const struct dpif *dpif OVS_UNUSED, void **statep)
889 struct dp_netdev_flow_state *state;
891 *statep = state = xmalloc(sizeof *state);
894 state->actions = NULL;
899 dpif_netdev_flow_dump_next(const struct dpif *dpif, void *state_,
900 const struct nlattr **key, size_t *key_len,
901 const struct nlattr **actions, size_t *actions_len,
902 const struct dpif_flow_stats **stats)
904 struct dp_netdev_flow_state *state = state_;
905 struct dp_netdev *dp = get_dp_netdev(dpif);
906 struct dp_netdev_flow *flow;
907 struct hmap_node *node;
909 node = hmap_at_position(&dp->flow_table, &state->bucket, &state->offset);
914 flow = CONTAINER_OF(node, struct dp_netdev_flow, node);
919 ofpbuf_use_stack(&buf, &state->keybuf, sizeof state->keybuf);
920 odp_flow_key_from_flow(&buf, &flow->key);
927 free(state->actions);
928 state->actions = xmemdup(flow->actions, flow->actions_len);
930 *actions = state->actions;
931 *actions_len = flow->actions_len;
935 get_dpif_flow_stats(flow, &state->stats);
936 *stats = &state->stats;
943 dpif_netdev_flow_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
945 struct dp_netdev_flow_state *state = state_;
947 free(state->actions);
953 dpif_netdev_execute(struct dpif *dpif,
954 const struct nlattr *key_attrs, size_t key_len,
955 const struct nlattr *actions, size_t actions_len,
956 const struct ofpbuf *packet)
958 struct dp_netdev *dp = get_dp_netdev(dpif);
964 if (packet->size < ETH_HEADER_LEN || packet->size > UINT16_MAX) {
968 error = dpif_netdev_validate_actions(actions, actions_len, &mutates);
974 /* We need a deep copy of 'packet' since we're going to modify its
976 ofpbuf_init(©, DP_NETDEV_HEADROOM + packet->size);
977 ofpbuf_reserve(©, DP_NETDEV_HEADROOM);
978 ofpbuf_put(©, packet->data, packet->size);
980 /* We still need a shallow copy of 'packet', even though we won't
981 * modify its data, because flow_extract() modifies packet->l2, etc.
982 * We could probably get away with modifying those but it's more polite
987 flow_extract(©, 0, -1, &key);
988 dpif_netdev_flow_from_nlattrs(key_attrs, key_len, &key);
990 error = dp_netdev_execute_actions(dp, ©, &key, actions, actions_len);
992 ofpbuf_uninit(©);
998 dpif_netdev_recv_get_mask(const struct dpif *dpif, int *listen_mask)
1000 struct dpif_netdev *dpif_netdev = dpif_netdev_cast(dpif);
1001 *listen_mask = dpif_netdev->listen_mask;
1006 dpif_netdev_recv_set_mask(struct dpif *dpif, int listen_mask)
1008 struct dpif_netdev *dpif_netdev = dpif_netdev_cast(dpif);
1009 dpif_netdev->listen_mask = listen_mask;
1013 static struct dp_netdev_queue *
1014 find_nonempty_queue(struct dpif *dpif)
1016 struct dpif_netdev *dpif_netdev = dpif_netdev_cast(dpif);
1017 struct dp_netdev *dp = get_dp_netdev(dpif);
1018 int mask = dpif_netdev->listen_mask;
1021 for (i = 0; i < N_QUEUES; i++) {
1022 struct dp_netdev_queue *q = &dp->queues[i];
1023 if (q->head != q->tail && mask & (1u << i)) {
1031 dpif_netdev_recv(struct dpif *dpif, struct dpif_upcall *upcall)
1033 struct dp_netdev_queue *q = find_nonempty_queue(dpif);
1035 struct dpif_upcall *u = q->upcalls[q->tail++ & QUEUE_MASK];
1046 dpif_netdev_recv_wait(struct dpif *dpif)
1048 if (find_nonempty_queue(dpif)) {
1049 poll_immediate_wake();
1051 /* No messages ready to be received, and dp_wait() will ensure that we
1052 * wake up to queue new messages, so there is nothing to do. */
1057 dpif_netdev_recv_purge(struct dpif *dpif)
1059 struct dpif_netdev *dpif_netdev = dpif_netdev_cast(dpif);
1060 dp_netdev_purge_queues(dpif_netdev->dp);
1064 dp_netdev_flow_used(struct dp_netdev_flow *flow, struct flow *key,
1065 const struct ofpbuf *packet)
1067 flow->used = time_msec();
1068 flow->packet_count++;
1069 flow->byte_count += packet->size;
1070 if (key->dl_type == htons(ETH_TYPE_IP) && key->nw_proto == IPPROTO_TCP) {
1071 struct tcp_header *th = packet->l4;
1072 flow->tcp_ctl |= th->tcp_ctl;
1077 dp_netdev_port_input(struct dp_netdev *dp, struct dp_netdev_port *port,
1078 struct ofpbuf *packet)
1080 struct dp_netdev_flow *flow;
1083 if (packet->size < ETH_HEADER_LEN) {
1086 if (flow_extract(packet, 0, port->port_no, &key) && dp->drop_frags) {
1091 flow = dp_netdev_lookup_flow(dp, &key);
1093 dp_netdev_flow_used(flow, &key, packet);
1094 dp_netdev_execute_actions(dp, packet, &key,
1095 flow->actions, flow->actions_len);
1099 dp_netdev_output_userspace(dp, packet, DPIF_UC_MISS, &key, 0);
1104 dpif_netdev_run(struct dpif *dpif)
1106 struct dp_netdev *dp = get_dp_netdev(dpif);
1107 struct dp_netdev_port *port;
1108 struct ofpbuf packet;
1110 ofpbuf_init(&packet, DP_NETDEV_HEADROOM + VLAN_ETH_HEADER_LEN + max_mtu);
1112 LIST_FOR_EACH (port, node, &dp->port_list) {
1115 /* Reset packet contents. */
1116 ofpbuf_clear(&packet);
1117 ofpbuf_reserve(&packet, DP_NETDEV_HEADROOM);
1119 error = netdev_recv(port->netdev, &packet);
1121 dp_netdev_port_input(dp, port, &packet);
1122 } else if (error != EAGAIN && error != EOPNOTSUPP) {
1123 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1124 VLOG_ERR_RL(&rl, "error receiving data from %s: %s",
1125 netdev_get_name(port->netdev), strerror(error));
1128 ofpbuf_uninit(&packet);
1132 dpif_netdev_wait(struct dpif *dpif)
1134 struct dp_netdev *dp = get_dp_netdev(dpif);
1135 struct dp_netdev_port *port;
1137 LIST_FOR_EACH (port, node, &dp->port_list) {
1138 netdev_recv_wait(port->netdev);
1143 dp_netdev_strip_vlan(struct ofpbuf *packet)
1145 struct vlan_eth_header *veh = packet->l2;
1146 if (packet->size >= sizeof *veh
1147 && veh->veth_type == htons(ETH_TYPE_VLAN)) {
1148 struct eth_header tmp;
1150 memcpy(tmp.eth_dst, veh->veth_dst, ETH_ADDR_LEN);
1151 memcpy(tmp.eth_src, veh->veth_src, ETH_ADDR_LEN);
1152 tmp.eth_type = veh->veth_next_type;
1154 ofpbuf_pull(packet, VLAN_HEADER_LEN);
1155 packet->l2 = (char*)packet->l2 + VLAN_HEADER_LEN;
1156 memcpy(packet->data, &tmp, sizeof tmp);
1161 dp_netdev_set_dl_src(struct ofpbuf *packet, const uint8_t dl_addr[ETH_ADDR_LEN])
1163 struct eth_header *eh = packet->l2;
1164 memcpy(eh->eth_src, dl_addr, sizeof eh->eth_src);
1168 dp_netdev_set_dl_dst(struct ofpbuf *packet, const uint8_t dl_addr[ETH_ADDR_LEN])
1170 struct eth_header *eh = packet->l2;
1171 memcpy(eh->eth_dst, dl_addr, sizeof eh->eth_dst);
1175 is_ip(const struct ofpbuf *packet, const struct flow *key)
1177 return key->dl_type == htons(ETH_TYPE_IP) && packet->l4;
1181 dp_netdev_set_nw_addr(struct ofpbuf *packet, const struct flow *key,
1182 const struct nlattr *a)
1184 if (is_ip(packet, key)) {
1185 struct ip_header *nh = packet->l3;
1186 ovs_be32 ip = nl_attr_get_be32(a);
1187 uint16_t type = nl_attr_type(a);
1190 field = type == ODP_ACTION_ATTR_SET_NW_SRC ? &nh->ip_src : &nh->ip_dst;
1191 if (key->nw_proto == IPPROTO_TCP && packet->l7) {
1192 struct tcp_header *th = packet->l4;
1193 th->tcp_csum = recalc_csum32(th->tcp_csum, *field, ip);
1194 } else if (key->nw_proto == IPPROTO_UDP && packet->l7) {
1195 struct udp_header *uh = packet->l4;
1197 uh->udp_csum = recalc_csum32(uh->udp_csum, *field, ip);
1198 if (!uh->udp_csum) {
1199 uh->udp_csum = htons(0xffff);
1203 nh->ip_csum = recalc_csum32(nh->ip_csum, *field, ip);
1209 dp_netdev_set_nw_tos(struct ofpbuf *packet, const struct flow *key,
1212 if (is_ip(packet, key)) {
1213 struct ip_header *nh = packet->l3;
1214 uint8_t *field = &nh->ip_tos;
1216 /* Set the DSCP bits and preserve the ECN bits. */
1217 uint8_t new = nw_tos | (nh->ip_tos & IP_ECN_MASK);
1219 nh->ip_csum = recalc_csum16(nh->ip_csum, htons((uint16_t)*field),
1220 htons((uint16_t) new));
1226 dp_netdev_set_tp_port(struct ofpbuf *packet, const struct flow *key,
1227 const struct nlattr *a)
1229 if (is_ip(packet, key)) {
1230 uint16_t type = nl_attr_type(a);
1231 ovs_be16 port = nl_attr_get_be16(a);
1234 if (key->nw_proto == IPPROTO_TCP && packet->l7) {
1235 struct tcp_header *th = packet->l4;
1236 field = (type == ODP_ACTION_ATTR_SET_TP_SRC
1237 ? &th->tcp_src : &th->tcp_dst);
1238 th->tcp_csum = recalc_csum16(th->tcp_csum, *field, port);
1240 } else if (key->nw_proto == IPPROTO_UDP && packet->l7) {
1241 struct udp_header *uh = packet->l4;
1242 field = (type == ODP_ACTION_ATTR_SET_TP_SRC
1243 ? &uh->udp_src : &uh->udp_dst);
1244 uh->udp_csum = recalc_csum16(uh->udp_csum, *field, port);
1253 dp_netdev_output_port(struct dp_netdev *dp, struct ofpbuf *packet,
1256 struct dp_netdev_port *p = dp->ports[out_port];
1258 netdev_send(p->netdev, packet);
1263 dp_netdev_output_userspace(struct dp_netdev *dp, const struct ofpbuf *packet,
1264 int queue_no, const struct flow *flow, uint64_t arg)
1266 struct dp_netdev_queue *q = &dp->queues[queue_no];
1267 struct dpif_upcall *upcall;
1271 if (q->head - q->tail >= MAX_QUEUE_LEN) {
1276 buf = ofpbuf_new(ODPUTIL_FLOW_KEY_BYTES + 2 + packet->size);
1277 odp_flow_key_from_flow(buf, flow);
1278 key_len = buf->size;
1279 ofpbuf_pull(buf, key_len);
1280 ofpbuf_reserve(buf, 2);
1281 ofpbuf_put(buf, packet->data, packet->size);
1283 upcall = xzalloc(sizeof *upcall);
1284 upcall->type = queue_no;
1285 upcall->packet = buf;
1286 upcall->key = buf->base;
1287 upcall->key_len = key_len;
1288 upcall->userdata = arg;
1290 q->upcalls[q->head++ & QUEUE_MASK] = upcall;
1296 dp_netdev_execute_actions(struct dp_netdev *dp,
1297 struct ofpbuf *packet, struct flow *key,
1298 const struct nlattr *actions,
1301 const struct nlattr *a;
1304 NL_ATTR_FOR_EACH_UNSAFE (a, left, actions, actions_len) {
1305 switch (nl_attr_type(a)) {
1306 case ODP_ACTION_ATTR_OUTPUT:
1307 dp_netdev_output_port(dp, packet, nl_attr_get_u32(a));
1310 case ODP_ACTION_ATTR_USERSPACE:
1311 dp_netdev_output_userspace(dp, packet, DPIF_UC_ACTION,
1312 key, nl_attr_get_u64(a));
1315 case ODP_ACTION_ATTR_SET_DL_TCI:
1316 eth_set_vlan_tci(packet, nl_attr_get_be16(a));
1319 case ODP_ACTION_ATTR_STRIP_VLAN:
1320 dp_netdev_strip_vlan(packet);
1323 case ODP_ACTION_ATTR_SET_DL_SRC:
1324 dp_netdev_set_dl_src(packet, nl_attr_get_unspec(a, ETH_ADDR_LEN));
1327 case ODP_ACTION_ATTR_SET_DL_DST:
1328 dp_netdev_set_dl_dst(packet, nl_attr_get_unspec(a, ETH_ADDR_LEN));
1331 case ODP_ACTION_ATTR_SET_NW_SRC:
1332 case ODP_ACTION_ATTR_SET_NW_DST:
1333 dp_netdev_set_nw_addr(packet, key, a);
1336 case ODP_ACTION_ATTR_SET_NW_TOS:
1337 dp_netdev_set_nw_tos(packet, key, nl_attr_get_u8(a));
1340 case ODP_ACTION_ATTR_SET_TP_SRC:
1341 case ODP_ACTION_ATTR_SET_TP_DST:
1342 dp_netdev_set_tp_port(packet, key, a);
1349 const struct dpif_class dpif_netdev_class = {
1351 NULL, /* enumerate */
1354 dpif_netdev_destroy,
1357 dpif_netdev_get_stats,
1358 dpif_netdev_get_drop_frags,
1359 dpif_netdev_set_drop_frags,
1360 dpif_netdev_port_add,
1361 dpif_netdev_port_del,
1362 dpif_netdev_port_query_by_number,
1363 dpif_netdev_port_query_by_name,
1364 dpif_netdev_get_max_ports,
1365 dpif_netdev_port_dump_start,
1366 dpif_netdev_port_dump_next,
1367 dpif_netdev_port_dump_done,
1368 dpif_netdev_port_poll,
1369 dpif_netdev_port_poll_wait,
1370 dpif_netdev_flow_get,
1371 dpif_netdev_flow_put,
1372 dpif_netdev_flow_del,
1373 dpif_netdev_flow_flush,
1374 dpif_netdev_flow_dump_start,
1375 dpif_netdev_flow_dump_next,
1376 dpif_netdev_flow_dump_done,
1377 dpif_netdev_execute,
1378 dpif_netdev_recv_get_mask,
1379 dpif_netdev_recv_set_mask,
1380 NULL, /* get_sflow_probability */
1381 NULL, /* set_sflow_probability */
1382 NULL, /* queue_to_priority */
1384 dpif_netdev_recv_wait,
1385 dpif_netdev_recv_purge,
1389 dpif_dummy_register(void)
1391 if (!dpif_dummy_class.type) {
1392 dpif_dummy_class = dpif_netdev_class;
1393 dpif_dummy_class.type = "dummy";
1394 dp_register_provider(&dpif_dummy_class);