2 * Copyright (c) 2009, 2010, 2011, 2012, 2013 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.
24 #include <netinet/in.h>
25 #include <sys/socket.h>
30 #include <sys/ioctl.h>
36 #include "dpif-provider.h"
38 #include "dynamic-string.h"
43 #include "netdev-vport.h"
45 #include "odp-execute.h"
47 #include "ofp-print.h"
50 #include "poll-loop.h"
60 VLOG_DEFINE_THIS_MODULE(dpif_netdev);
62 /* Configuration parameters. */
63 enum { MAX_PORTS = 256 }; /* Maximum number of ports. */
64 enum { MAX_FLOWS = 65536 }; /* Maximum number of flows in flow table. */
66 /* Enough headroom to add a vlan tag, plus an extra 2 bytes to allow IP
67 * headers to be aligned on a 4-byte boundary. */
68 enum { DP_NETDEV_HEADROOM = 2 + VLAN_HEADER_LEN };
71 enum { N_QUEUES = 2 }; /* Number of queues for dpif_recv(). */
72 enum { MAX_QUEUE_LEN = 128 }; /* Maximum number of packets per queue. */
73 enum { QUEUE_MASK = MAX_QUEUE_LEN - 1 };
74 BUILD_ASSERT_DECL(IS_POW2(MAX_QUEUE_LEN));
76 struct dp_netdev_upcall {
77 struct dpif_upcall upcall; /* Queued upcall information. */
78 struct ofpbuf buf; /* ofpbuf instance for upcall.packet. */
81 struct dp_netdev_queue {
82 struct dp_netdev_upcall upcalls[MAX_QUEUE_LEN];
83 unsigned int head, tail;
86 /* Datapath based on the network device interface from netdev.h. */
88 const struct dpif_class *class;
92 int max_mtu; /* Maximum MTU of any port added so far. */
94 struct dp_netdev_queue queues[N_QUEUES];
95 struct hmap flow_table; /* Flow table. */
96 struct seq *queue_seq; /* Incremented whenever a packet is queued. */
99 long long int n_hit; /* Number of flow table matches. */
100 long long int n_missed; /* Number of flow table misses. */
101 long long int n_lost; /* Number of misses not passed to client. */
104 struct dp_netdev_port *ports[MAX_PORTS];
105 struct list port_list;
106 struct seq *port_seq; /* Incremented whenever a port changes. */
109 /* A port in a netdev-based datapath. */
110 struct dp_netdev_port {
111 odp_port_t port_no; /* Index into dp_netdev's 'ports'. */
112 struct list node; /* Element in dp_netdev's 'port_list'. */
113 struct netdev *netdev;
114 struct netdev_saved_flags *sf;
115 struct netdev_rx *rx;
116 char *type; /* Port type as requested by user. */
119 /* A flow in dp_netdev's 'flow_table'. */
120 struct dp_netdev_flow {
121 struct hmap_node node; /* Element in dp_netdev's 'flow_table'. */
125 long long int used; /* Last used time, in monotonic msecs. */
126 long long int packet_count; /* Number of packets matched. */
127 long long int byte_count; /* Number of bytes matched. */
128 uint8_t tcp_flags; /* Bitwise-OR of seen tcp_flags values. */
131 struct nlattr *actions;
135 /* Interface to netdev-based datapath. */
138 struct dp_netdev *dp;
139 uint64_t last_port_seq;
142 /* All netdev-based datapaths. */
143 static struct shash dp_netdevs = SHASH_INITIALIZER(&dp_netdevs);
145 /* Global lock for all data. */
146 static struct ovs_mutex dp_netdev_mutex = OVS_MUTEX_INITIALIZER;
148 static int get_port_by_number(struct dp_netdev *, odp_port_t port_no,
149 struct dp_netdev_port **portp);
150 static int get_port_by_name(struct dp_netdev *, const char *devname,
151 struct dp_netdev_port **portp);
152 static void dp_netdev_free(struct dp_netdev *);
153 static void dp_netdev_flow_flush(struct dp_netdev *);
154 static int do_add_port(struct dp_netdev *, const char *devname,
155 const char *type, odp_port_t port_no);
156 static int do_del_port(struct dp_netdev *, odp_port_t port_no);
157 static int dpif_netdev_open(const struct dpif_class *, const char *name,
158 bool create, struct dpif **);
159 static int dp_netdev_output_userspace(struct dp_netdev *, const struct ofpbuf *,
160 int queue_no, const struct flow *,
161 const struct nlattr *userdata);
162 static void dp_netdev_execute_actions(struct dp_netdev *,
163 struct ofpbuf *, struct flow *,
164 const struct nlattr *actions,
166 static void dp_netdev_port_input(struct dp_netdev *dp,
167 struct dp_netdev_port *port,
168 struct ofpbuf *packet, uint32_t skb_priority,
169 uint32_t pkt_mark, const struct flow_tnl *tnl);
171 static struct dpif_netdev *
172 dpif_netdev_cast(const struct dpif *dpif)
174 ovs_assert(dpif->dpif_class->open == dpif_netdev_open);
175 return CONTAINER_OF(dpif, struct dpif_netdev, dpif);
178 static struct dp_netdev *
179 get_dp_netdev(const struct dpif *dpif)
181 return dpif_netdev_cast(dpif)->dp;
185 dpif_netdev_enumerate(struct sset *all_dps)
187 struct shash_node *node;
189 ovs_mutex_lock(&dp_netdev_mutex);
190 SHASH_FOR_EACH(node, &dp_netdevs) {
191 sset_add(all_dps, node->name);
193 ovs_mutex_unlock(&dp_netdev_mutex);
199 dpif_netdev_class_is_dummy(const struct dpif_class *class)
201 return class != &dpif_netdev_class;
205 dpif_netdev_class_is_planetlab(const struct dpif_class *class)
207 return class == &dpif_planetlab_class;
211 dpif_netdev_port_open_type(const struct dpif_class *class, const char *type)
213 return strcmp(type, "internal") ? type
214 : dpif_netdev_class_is_planetlab(class) ? "pltap"
215 : dpif_netdev_class_is_dummy(class) ? "dummy"
220 create_dpif_netdev(struct dp_netdev *dp)
222 uint16_t netflow_id = hash_string(dp->name, 0);
223 struct dpif_netdev *dpif;
227 dpif = xmalloc(sizeof *dpif);
228 dpif_init(&dpif->dpif, dp->class, dp->name, netflow_id >> 8, netflow_id);
230 dpif->last_port_seq = seq_read(dp->port_seq);
235 /* Choose an unused, non-zero port number and return it on success.
236 * Return ODPP_NONE on failure. */
238 choose_port(struct dp_netdev *dp, const char *name)
242 if (dp->class != &dpif_netdev_class &&
243 dp->class != &dpif_planetlab_class) {
247 /* If the port name begins with "br", start the number search at
248 * 100 to make writing tests easier. */
249 if (!strncmp(name, "br", 2)) {
253 /* If the port name contains a number, try to assign that port number.
254 * This can make writing unit tests easier because port numbers are
256 for (p = name; *p != '\0'; p++) {
257 if (isdigit((unsigned char) *p)) {
258 port_no = start_no + strtol(p, NULL, 10);
259 if (port_no > 0 && port_no < MAX_PORTS
260 && !dp->ports[port_no]) {
261 return u32_to_odp(port_no);
268 for (port_no = 1; port_no < MAX_PORTS; port_no++) {
269 if (!dp->ports[port_no]) {
270 return u32_to_odp(port_no);
278 create_dp_netdev(const char *name, const struct dpif_class *class,
279 struct dp_netdev **dpp)
281 struct dp_netdev *dp;
285 dp = xzalloc(sizeof *dp);
287 dp->name = xstrdup(name);
289 dp->max_mtu = ETH_PAYLOAD_MAX;
290 for (i = 0; i < N_QUEUES; i++) {
291 dp->queues[i].head = dp->queues[i].tail = 0;
293 dp->queue_seq = seq_create();
294 hmap_init(&dp->flow_table);
295 list_init(&dp->port_list);
296 dp->port_seq = seq_create();
298 error = do_add_port(dp, name, "internal", ODPP_LOCAL);
304 shash_add(&dp_netdevs, name, dp);
311 dpif_netdev_open(const struct dpif_class *class, const char *name,
312 bool create, struct dpif **dpifp)
314 struct dp_netdev *dp;
317 ovs_mutex_lock(&dp_netdev_mutex);
318 dp = shash_find_data(&dp_netdevs, name);
320 error = create ? create_dp_netdev(name, class, &dp) : ENODEV;
322 error = (dp->class != class ? EINVAL
327 *dpifp = create_dpif_netdev(dp);
329 ovs_mutex_unlock(&dp_netdev_mutex);
335 dp_netdev_purge_queues(struct dp_netdev *dp)
339 for (i = 0; i < N_QUEUES; i++) {
340 struct dp_netdev_queue *q = &dp->queues[i];
342 while (q->tail != q->head) {
343 struct dp_netdev_upcall *u = &q->upcalls[q->tail++ & QUEUE_MASK];
344 ofpbuf_uninit(&u->buf);
350 dp_netdev_free(struct dp_netdev *dp)
352 struct dp_netdev_port *port, *next;
354 dp_netdev_flow_flush(dp);
355 LIST_FOR_EACH_SAFE (port, next, node, &dp->port_list) {
356 do_del_port(dp, port->port_no);
358 dp_netdev_purge_queues(dp);
359 seq_destroy(dp->queue_seq);
360 hmap_destroy(&dp->flow_table);
361 seq_destroy(dp->port_seq);
367 dpif_netdev_close(struct dpif *dpif)
369 struct dp_netdev *dp = get_dp_netdev(dpif);
371 ovs_mutex_lock(&dp_netdev_mutex);
373 ovs_assert(dp->open_cnt > 0);
374 if (--dp->open_cnt == 0 && dp->destroyed) {
375 shash_find_and_delete(&dp_netdevs, dp->name);
380 ovs_mutex_unlock(&dp_netdev_mutex);
384 dpif_netdev_destroy(struct dpif *dpif)
386 struct dp_netdev *dp = get_dp_netdev(dpif);
388 ovs_mutex_lock(&dp_netdev_mutex);
389 dp->destroyed = true;
390 ovs_mutex_unlock(&dp_netdev_mutex);
396 dpif_netdev_get_stats(const struct dpif *dpif, struct dpif_dp_stats *stats)
398 struct dp_netdev *dp = get_dp_netdev(dpif);
400 ovs_mutex_lock(&dp_netdev_mutex);
401 stats->n_flows = hmap_count(&dp->flow_table);
402 stats->n_hit = dp->n_hit;
403 stats->n_missed = dp->n_missed;
404 stats->n_lost = dp->n_lost;
405 ovs_mutex_unlock(&dp_netdev_mutex);
411 do_add_port(struct dp_netdev *dp, const char *devname, const char *type,
414 struct netdev_saved_flags *sf;
415 struct dp_netdev_port *port;
416 struct netdev *netdev;
417 struct netdev_rx *rx;
418 enum netdev_flags flags;
419 const char *open_type;
423 /* XXX reject devices already in some dp_netdev. */
425 /* Open and validate network device. */
426 open_type = dpif_netdev_port_open_type(dp->class, type);
427 error = netdev_open(devname, open_type, &netdev);
431 /* XXX reject non-Ethernet devices */
433 netdev_get_flags(netdev, &flags);
434 if (flags & NETDEV_LOOPBACK) {
435 VLOG_ERR("%s: cannot add a loopback device", devname);
436 netdev_close(netdev);
440 error = netdev_rx_open(netdev, &rx);
442 && !(error == EOPNOTSUPP && dpif_netdev_class_is_dummy(dp->class))) {
443 VLOG_ERR("%s: cannot receive packets on this network device (%s)",
444 devname, ovs_strerror(errno));
445 netdev_close(netdev);
449 error = netdev_turn_flags_on(netdev, NETDEV_PROMISC, &sf);
452 netdev_close(netdev);
456 port = xmalloc(sizeof *port);
457 port->port_no = port_no;
458 port->netdev = netdev;
461 port->type = xstrdup(type);
463 error = netdev_get_mtu(netdev, &mtu);
464 if (!error && mtu > dp->max_mtu) {
468 list_push_back(&dp->port_list, &port->node);
469 dp->ports[odp_to_u32(port_no)] = port;
470 seq_change(dp->port_seq);
476 dpif_netdev_port_add(struct dpif *dpif, struct netdev *netdev,
477 odp_port_t *port_nop)
479 struct dp_netdev *dp = get_dp_netdev(dpif);
480 char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
481 const char *dpif_port;
485 ovs_mutex_lock(&dp_netdev_mutex);
486 dpif_port = netdev_vport_get_dpif_port(netdev, namebuf, sizeof namebuf);
487 if (*port_nop != ODPP_NONE) {
488 uint32_t port_idx = odp_to_u32(*port_nop);
489 if (port_idx >= MAX_PORTS) {
491 } else if (dp->ports[port_idx]) {
498 port_no = choose_port(dp, dpif_port);
499 error = port_no == ODPP_NONE ? EFBIG : 0;
503 error = do_add_port(dp, dpif_port, netdev_get_type(netdev), port_no);
505 ovs_mutex_unlock(&dp_netdev_mutex);
511 dpif_netdev_port_del(struct dpif *dpif, odp_port_t port_no)
513 struct dp_netdev *dp = get_dp_netdev(dpif);
516 ovs_mutex_lock(&dp_netdev_mutex);
517 error = port_no == ODPP_LOCAL ? EINVAL : do_del_port(dp, port_no);
518 ovs_mutex_unlock(&dp_netdev_mutex);
524 is_valid_port_number(odp_port_t port_no)
526 return odp_to_u32(port_no) < MAX_PORTS;
530 get_port_by_number(struct dp_netdev *dp,
531 odp_port_t port_no, struct dp_netdev_port **portp)
533 if (!is_valid_port_number(port_no)) {
537 *portp = dp->ports[odp_to_u32(port_no)];
538 return *portp ? 0 : ENOENT;
543 get_port_by_name(struct dp_netdev *dp,
544 const char *devname, struct dp_netdev_port **portp)
546 struct dp_netdev_port *port;
548 LIST_FOR_EACH (port, node, &dp->port_list) {
549 if (!strcmp(netdev_get_name(port->netdev), devname)) {
558 do_del_port(struct dp_netdev *dp, odp_port_t port_no)
560 struct dp_netdev_port *port;
563 error = get_port_by_number(dp, port_no, &port);
568 list_remove(&port->node);
569 dp->ports[odp_to_u32(port_no)] = NULL;
570 seq_change(dp->port_seq);
572 netdev_close(port->netdev);
573 netdev_restore_flags(port->sf);
574 netdev_rx_close(port->rx);
582 answer_port_query(const struct dp_netdev_port *port,
583 struct dpif_port *dpif_port)
585 dpif_port->name = xstrdup(netdev_get_name(port->netdev));
586 dpif_port->type = xstrdup(port->type);
587 dpif_port->port_no = port->port_no;
591 dpif_netdev_port_query_by_number(const struct dpif *dpif, odp_port_t port_no,
592 struct dpif_port *dpif_port)
594 struct dp_netdev *dp = get_dp_netdev(dpif);
595 struct dp_netdev_port *port;
598 ovs_mutex_lock(&dp_netdev_mutex);
599 error = get_port_by_number(dp, port_no, &port);
600 if (!error && dpif_port) {
601 answer_port_query(port, dpif_port);
603 ovs_mutex_unlock(&dp_netdev_mutex);
609 dpif_netdev_port_query_by_name(const struct dpif *dpif, const char *devname,
610 struct dpif_port *dpif_port)
612 struct dp_netdev *dp = get_dp_netdev(dpif);
613 struct dp_netdev_port *port;
616 ovs_mutex_lock(&dp_netdev_mutex);
617 error = get_port_by_name(dp, devname, &port);
618 if (!error && dpif_port) {
619 answer_port_query(port, dpif_port);
621 ovs_mutex_unlock(&dp_netdev_mutex);
627 dpif_netdev_get_max_ports(const struct dpif *dpif OVS_UNUSED)
633 dp_netdev_free_flow(struct dp_netdev *dp, struct dp_netdev_flow *flow)
635 hmap_remove(&dp->flow_table, &flow->node);
641 dp_netdev_flow_flush(struct dp_netdev *dp)
643 struct dp_netdev_flow *flow, *next;
645 HMAP_FOR_EACH_SAFE (flow, next, node, &dp->flow_table) {
646 dp_netdev_free_flow(dp, flow);
651 dpif_netdev_flow_flush(struct dpif *dpif)
653 struct dp_netdev *dp = get_dp_netdev(dpif);
655 ovs_mutex_lock(&dp_netdev_mutex);
656 dp_netdev_flow_flush(dp);
657 ovs_mutex_unlock(&dp_netdev_mutex);
662 struct dp_netdev_port_state {
668 dpif_netdev_port_dump_start(const struct dpif *dpif OVS_UNUSED, void **statep)
670 *statep = xzalloc(sizeof(struct dp_netdev_port_state));
675 dpif_netdev_port_dump_next(const struct dpif *dpif, void *state_,
676 struct dpif_port *dpif_port)
678 struct dp_netdev_port_state *state = state_;
679 struct dp_netdev *dp = get_dp_netdev(dpif);
682 ovs_mutex_lock(&dp_netdev_mutex);
683 for (port_idx = odp_to_u32(state->port_no);
684 port_idx < MAX_PORTS; port_idx++) {
685 struct dp_netdev_port *port = dp->ports[port_idx];
688 state->name = xstrdup(netdev_get_name(port->netdev));
689 dpif_port->name = state->name;
690 dpif_port->type = port->type;
691 dpif_port->port_no = port->port_no;
692 state->port_no = u32_to_odp(port_idx + 1);
693 ovs_mutex_unlock(&dp_netdev_mutex);
698 ovs_mutex_unlock(&dp_netdev_mutex);
704 dpif_netdev_port_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
706 struct dp_netdev_port_state *state = state_;
713 dpif_netdev_port_poll(const struct dpif *dpif_, char **devnamep OVS_UNUSED)
715 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
716 uint64_t new_port_seq;
719 ovs_mutex_lock(&dp_netdev_mutex);
720 new_port_seq = seq_read(dpif->dp->port_seq);
721 if (dpif->last_port_seq != new_port_seq) {
722 dpif->last_port_seq = new_port_seq;
727 ovs_mutex_unlock(&dp_netdev_mutex);
733 dpif_netdev_port_poll_wait(const struct dpif *dpif_)
735 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
737 ovs_mutex_lock(&dp_netdev_mutex);
738 seq_wait(dpif->dp->port_seq, dpif->last_port_seq);
739 ovs_mutex_unlock(&dp_netdev_mutex);
742 static struct dp_netdev_flow *
743 dp_netdev_lookup_flow(const struct dp_netdev *dp, const struct flow *key)
745 struct dp_netdev_flow *flow;
747 HMAP_FOR_EACH_WITH_HASH (flow, node, flow_hash(key, 0), &dp->flow_table) {
748 if (flow_equal(&flow->key, key)) {
756 get_dpif_flow_stats(struct dp_netdev_flow *flow, struct dpif_flow_stats *stats)
758 stats->n_packets = flow->packet_count;
759 stats->n_bytes = flow->byte_count;
760 stats->used = flow->used;
761 stats->tcp_flags = flow->tcp_flags;
765 dpif_netdev_flow_from_nlattrs(const struct nlattr *key, uint32_t key_len,
770 if (odp_flow_key_to_flow(key, key_len, flow) != ODP_FIT_PERFECT) {
771 /* This should not happen: it indicates that odp_flow_key_from_flow()
772 * and odp_flow_key_to_flow() disagree on the acceptable form of a
773 * flow. Log the problem as an error, with enough details to enable
775 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
777 if (!VLOG_DROP_ERR(&rl)) {
781 odp_flow_key_format(key, key_len, &s);
782 VLOG_ERR("internal error parsing flow key %s", ds_cstr(&s));
789 in_port = flow->in_port.odp_port;
790 if (!is_valid_port_number(in_port) && in_port != ODPP_NONE) {
798 dpif_netdev_flow_get(const struct dpif *dpif,
799 const struct nlattr *nl_key, size_t nl_key_len,
800 struct ofpbuf **actionsp, struct dpif_flow_stats *stats)
802 struct dp_netdev *dp = get_dp_netdev(dpif);
803 struct dp_netdev_flow *flow;
807 error = dpif_netdev_flow_from_nlattrs(nl_key, nl_key_len, &key);
812 ovs_mutex_lock(&dp_netdev_mutex);
813 flow = dp_netdev_lookup_flow(dp, &key);
816 get_dpif_flow_stats(flow, stats);
819 *actionsp = ofpbuf_clone_data(flow->actions, flow->actions_len);
824 ovs_mutex_unlock(&dp_netdev_mutex);
830 set_flow_actions(struct dp_netdev_flow *flow,
831 const struct nlattr *actions, size_t actions_len)
833 flow->actions = xrealloc(flow->actions, actions_len);
834 flow->actions_len = actions_len;
835 memcpy(flow->actions, actions, actions_len);
840 dp_netdev_flow_add(struct dp_netdev *dp, const struct flow *key,
841 const struct nlattr *actions, size_t actions_len)
843 struct dp_netdev_flow *flow;
846 flow = xzalloc(sizeof *flow);
849 error = set_flow_actions(flow, actions, actions_len);
855 hmap_insert(&dp->flow_table, &flow->node, flow_hash(&flow->key, 0));
860 clear_stats(struct dp_netdev_flow *flow)
863 flow->packet_count = 0;
864 flow->byte_count = 0;
869 dpif_netdev_flow_put(struct dpif *dpif, const struct dpif_flow_put *put)
871 struct dp_netdev *dp = get_dp_netdev(dpif);
872 struct dp_netdev_flow *flow;
876 error = dpif_netdev_flow_from_nlattrs(put->key, put->key_len, &key);
881 ovs_mutex_lock(&dp_netdev_mutex);
882 flow = dp_netdev_lookup_flow(dp, &key);
884 if (put->flags & DPIF_FP_CREATE) {
885 if (hmap_count(&dp->flow_table) < MAX_FLOWS) {
887 memset(put->stats, 0, sizeof *put->stats);
889 error = dp_netdev_flow_add(dp, &key, put->actions,
898 if (put->flags & DPIF_FP_MODIFY) {
899 error = set_flow_actions(flow, put->actions, put->actions_len);
902 get_dpif_flow_stats(flow, put->stats);
904 if (put->flags & DPIF_FP_ZERO_STATS) {
912 ovs_mutex_unlock(&dp_netdev_mutex);
918 dpif_netdev_flow_del(struct dpif *dpif, const struct dpif_flow_del *del)
920 struct dp_netdev *dp = get_dp_netdev(dpif);
921 struct dp_netdev_flow *flow;
925 error = dpif_netdev_flow_from_nlattrs(del->key, del->key_len, &key);
930 ovs_mutex_lock(&dp_netdev_mutex);
931 flow = dp_netdev_lookup_flow(dp, &key);
934 get_dpif_flow_stats(flow, del->stats);
936 dp_netdev_free_flow(dp, flow);
940 ovs_mutex_unlock(&dp_netdev_mutex);
945 struct dp_netdev_flow_state {
948 struct nlattr *actions;
949 struct odputil_keybuf keybuf;
950 struct dpif_flow_stats stats;
954 dpif_netdev_flow_dump_start(const struct dpif *dpif OVS_UNUSED, void **statep)
956 struct dp_netdev_flow_state *state;
958 *statep = state = xmalloc(sizeof *state);
961 state->actions = NULL;
966 dpif_netdev_flow_dump_next(const struct dpif *dpif, void *state_,
967 const struct nlattr **key, size_t *key_len,
968 const struct nlattr **mask, size_t *mask_len,
969 const struct nlattr **actions, size_t *actions_len,
970 const struct dpif_flow_stats **stats)
972 struct dp_netdev_flow_state *state = state_;
973 struct dp_netdev *dp = get_dp_netdev(dpif);
974 struct dp_netdev_flow *flow;
975 struct hmap_node *node;
977 ovs_mutex_lock(&dp_netdev_mutex);
978 node = hmap_at_position(&dp->flow_table, &state->bucket, &state->offset);
980 ovs_mutex_unlock(&dp_netdev_mutex);
984 flow = CONTAINER_OF(node, struct dp_netdev_flow, node);
989 ofpbuf_use_stack(&buf, &state->keybuf, sizeof state->keybuf);
990 odp_flow_key_from_flow(&buf, &flow->key, flow->key.in_port.odp_port);
1002 free(state->actions);
1003 state->actions = xmemdup(flow->actions, flow->actions_len);
1005 *actions = state->actions;
1006 *actions_len = flow->actions_len;
1010 get_dpif_flow_stats(flow, &state->stats);
1011 *stats = &state->stats;
1014 ovs_mutex_unlock(&dp_netdev_mutex);
1019 dpif_netdev_flow_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
1021 struct dp_netdev_flow_state *state = state_;
1023 free(state->actions);
1029 dpif_netdev_execute(struct dpif *dpif, const struct dpif_execute *execute)
1031 struct dp_netdev *dp = get_dp_netdev(dpif);
1036 if (execute->packet->size < ETH_HEADER_LEN ||
1037 execute->packet->size > UINT16_MAX) {
1041 /* Make a deep copy of 'packet', because we might modify its data. */
1042 ofpbuf_init(©, DP_NETDEV_HEADROOM + execute->packet->size);
1043 ofpbuf_reserve(©, DP_NETDEV_HEADROOM);
1044 ofpbuf_put(©, execute->packet->data, execute->packet->size);
1046 flow_extract(©, 0, 0, NULL, NULL, &key);
1047 error = dpif_netdev_flow_from_nlattrs(execute->key, execute->key_len,
1050 ovs_mutex_lock(&dp_netdev_mutex);
1051 dp_netdev_execute_actions(dp, ©, &key,
1052 execute->actions, execute->actions_len);
1053 ovs_mutex_unlock(&dp_netdev_mutex);
1056 ofpbuf_uninit(©);
1061 dpif_netdev_recv_set(struct dpif *dpif OVS_UNUSED, bool enable OVS_UNUSED)
1067 dpif_netdev_queue_to_priority(const struct dpif *dpif OVS_UNUSED,
1068 uint32_t queue_id, uint32_t *priority)
1070 *priority = queue_id;
1074 static struct dp_netdev_queue *
1075 find_nonempty_queue(struct dpif *dpif)
1077 struct dp_netdev *dp = get_dp_netdev(dpif);
1080 for (i = 0; i < N_QUEUES; i++) {
1081 struct dp_netdev_queue *q = &dp->queues[i];
1082 if (q->head != q->tail) {
1090 dpif_netdev_recv(struct dpif *dpif, struct dpif_upcall *upcall,
1093 struct dp_netdev_queue *q;
1096 ovs_mutex_lock(&dp_netdev_mutex);
1097 q = find_nonempty_queue(dpif);
1099 struct dp_netdev_upcall *u = &q->upcalls[q->tail++ & QUEUE_MASK];
1101 *upcall = u->upcall;
1102 upcall->packet = buf;
1111 ovs_mutex_unlock(&dp_netdev_mutex);
1117 dpif_netdev_recv_wait(struct dpif *dpif)
1119 struct dp_netdev *dp = get_dp_netdev(dpif);
1122 ovs_mutex_lock(&dp_netdev_mutex);
1123 seq = seq_read(dp->queue_seq);
1124 if (find_nonempty_queue(dpif)) {
1125 poll_immediate_wake();
1127 seq_wait(dp->queue_seq, seq);
1129 ovs_mutex_unlock(&dp_netdev_mutex);
1133 dpif_netdev_recv_purge(struct dpif *dpif)
1135 struct dpif_netdev *dpif_netdev = dpif_netdev_cast(dpif);
1136 ovs_mutex_lock(&dp_netdev_mutex);
1137 dp_netdev_purge_queues(dpif_netdev->dp);
1138 ovs_mutex_unlock(&dp_netdev_mutex);
1142 dp_netdev_flow_used(struct dp_netdev_flow *flow, const struct ofpbuf *packet)
1144 flow->used = time_msec();
1145 flow->packet_count++;
1146 flow->byte_count += packet->size;
1147 flow->tcp_flags |= packet_get_tcp_flags(packet, &flow->key);
1151 dp_netdev_port_input(struct dp_netdev *dp, struct dp_netdev_port *port,
1152 struct ofpbuf *packet, uint32_t skb_priority,
1153 uint32_t pkt_mark, const struct flow_tnl *tnl)
1155 struct dp_netdev_flow *flow;
1157 union flow_in_port in_port_;
1159 if (packet->size < ETH_HEADER_LEN) {
1162 in_port_.odp_port = port->port_no;
1163 flow_extract(packet, skb_priority, pkt_mark, tnl, &in_port_, &key);
1164 flow = dp_netdev_lookup_flow(dp, &key);
1166 dp_netdev_flow_used(flow, packet);
1167 dp_netdev_execute_actions(dp, packet, &key,
1168 flow->actions, flow->actions_len);
1172 dp_netdev_output_userspace(dp, packet, DPIF_UC_MISS, &key, NULL);
1177 dpif_netdev_run(struct dpif *dpif)
1179 struct dp_netdev_port *port;
1180 struct dp_netdev *dp;
1181 struct ofpbuf packet;
1183 ovs_mutex_lock(&dp_netdev_mutex);
1184 dp = get_dp_netdev(dpif);
1185 ofpbuf_init(&packet,
1186 DP_NETDEV_HEADROOM + VLAN_ETH_HEADER_LEN + dp->max_mtu);
1188 LIST_FOR_EACH (port, node, &dp->port_list) {
1191 /* Reset packet contents. */
1192 ofpbuf_clear(&packet);
1193 ofpbuf_reserve(&packet, DP_NETDEV_HEADROOM);
1195 error = port->rx ? netdev_rx_recv(port->rx, &packet) : EOPNOTSUPP;
1197 dp_netdev_port_input(dp, port, &packet, 0, 0, NULL);
1198 } else if (error != EAGAIN && error != EOPNOTSUPP) {
1199 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1201 VLOG_ERR_RL(&rl, "error receiving data from %s: %s",
1202 netdev_get_name(port->netdev), ovs_strerror(error));
1205 ofpbuf_uninit(&packet);
1206 ovs_mutex_unlock(&dp_netdev_mutex);
1210 dpif_netdev_wait(struct dpif *dpif)
1212 struct dp_netdev_port *port;
1214 /* There is a race here, if thread A calls dpif_netdev_wait(dpif) and
1215 * thread B calls dpif_port_add(dpif) or dpif_port_remove(dpif) before
1216 * A makes it to poll_block().
1218 * But I think it doesn't matter:
1220 * - In the dpif_port_add() case, A will not wake up when a packet
1221 * arrives on the new port, but this would also happen if the
1222 * ordering were reversed.
1224 * - In the dpif_port_remove() case, A might wake up spuriously, but
1225 * that is harmless. */
1227 ovs_mutex_lock(&dp_netdev_mutex);
1228 LIST_FOR_EACH (port, node, &get_dp_netdev(dpif)->port_list) {
1230 netdev_rx_wait(port->rx);
1233 ovs_mutex_unlock(&dp_netdev_mutex);
1237 dp_netdev_output_port(void *dp_, struct ofpbuf *packet,
1238 const struct flow *flow OVS_UNUSED, odp_port_t out_port)
1240 struct dp_netdev *dp = dp_;
1241 struct dp_netdev_port *p = dp->ports[odp_to_u32(out_port)];
1243 netdev_send(p->netdev, packet);
1248 dp_netdev_output_userspace(struct dp_netdev *dp, const struct ofpbuf *packet,
1249 int queue_no, const struct flow *flow,
1250 const struct nlattr *userdata)
1252 struct dp_netdev_queue *q = &dp->queues[queue_no];
1253 if (q->head - q->tail < MAX_QUEUE_LEN) {
1254 struct dp_netdev_upcall *u = &q->upcalls[q->head++ & QUEUE_MASK];
1255 struct dpif_upcall *upcall = &u->upcall;
1256 struct ofpbuf *buf = &u->buf;
1259 upcall->type = queue_no;
1261 /* Allocate buffer big enough for everything. */
1262 buf_size = ODPUTIL_FLOW_KEY_BYTES + 2 + packet->size;
1264 buf_size += NLA_ALIGN(userdata->nla_len);
1266 ofpbuf_init(buf, buf_size);
1269 odp_flow_key_from_flow(buf, flow, flow->in_port.odp_port);
1270 upcall->key = buf->data;
1271 upcall->key_len = buf->size;
1275 upcall->userdata = ofpbuf_put(buf, userdata,
1276 NLA_ALIGN(userdata->nla_len));
1281 * We adjust 'data' and 'size' in 'buf' so that only the packet itself
1282 * is visible in 'upcall->packet'. The ODP flow and (if present)
1283 * userdata become part of the headroom. */
1284 ofpbuf_put_zeros(buf, 2);
1285 buf->data = ofpbuf_put(buf, packet->data, packet->size);
1286 buf->size = packet->size;
1287 upcall->packet = buf;
1289 seq_change(dp->queue_seq);
1299 dp_netdev_action_userspace(void *dp, struct ofpbuf *packet,
1300 const struct flow *key,
1301 const struct nlattr *a)
1303 const struct nlattr *userdata;
1305 userdata = nl_attr_find_nested(a, OVS_USERSPACE_ATTR_USERDATA);
1306 dp_netdev_output_userspace(dp, packet, DPIF_UC_ACTION, key, userdata);
1310 dp_netdev_execute_actions(struct dp_netdev *dp,
1311 struct ofpbuf *packet, struct flow *key,
1312 const struct nlattr *actions,
1315 odp_execute_actions(dp, packet, key, actions, actions_len,
1316 dp_netdev_output_port, dp_netdev_action_userspace);
1319 #define DPIF_NETDEV_CLASS_FUNCTIONS \
1320 dpif_netdev_enumerate, \
1321 dpif_netdev_port_open_type, \
1323 dpif_netdev_close, \
1324 dpif_netdev_destroy, \
1327 dpif_netdev_get_stats, \
1328 dpif_netdev_port_add, \
1329 dpif_netdev_port_del, \
1330 dpif_netdev_port_query_by_number, \
1331 dpif_netdev_port_query_by_name, \
1332 dpif_netdev_get_max_ports, \
1333 NULL, /* port_get_pid */ \
1334 dpif_netdev_port_dump_start, \
1335 dpif_netdev_port_dump_next, \
1336 dpif_netdev_port_dump_done, \
1337 dpif_netdev_port_poll, \
1338 dpif_netdev_port_poll_wait, \
1339 dpif_netdev_flow_get, \
1340 dpif_netdev_flow_put, \
1341 dpif_netdev_flow_del, \
1342 dpif_netdev_flow_flush, \
1343 dpif_netdev_flow_dump_start, \
1344 dpif_netdev_flow_dump_next, \
1345 dpif_netdev_flow_dump_done, \
1346 dpif_netdev_execute, \
1347 NULL, /* operate */ \
1348 dpif_netdev_recv_set, \
1349 dpif_netdev_queue_to_priority, \
1351 dpif_netdev_recv_wait, \
1352 dpif_netdev_recv_purge, \
1354 const struct dpif_class dpif_netdev_class = {
1356 DPIF_NETDEV_CLASS_FUNCTIONS
1359 const struct dpif_class dpif_planetlab_class = {
1361 DPIF_NETDEV_CLASS_FUNCTIONS
1365 dpif_dummy_change_port_number(struct unixctl_conn *conn, int argc OVS_UNUSED,
1366 const char *argv[], void *aux OVS_UNUSED)
1368 struct dp_netdev_port *port;
1369 struct dp_netdev *dp;
1372 dp = shash_find_data(&dp_netdevs, argv[1]);
1373 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
1374 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
1378 if (get_port_by_name(dp, argv[2], &port)) {
1379 unixctl_command_reply_error(conn, "unknown port");
1383 port_no = atoi(argv[3]);
1384 if (port_no <= 0 || port_no >= MAX_PORTS) {
1385 unixctl_command_reply_error(conn, "bad port number");
1388 if (dp->ports[port_no]) {
1389 unixctl_command_reply_error(conn, "port number already in use");
1392 dp->ports[odp_to_u32(port->port_no)] = NULL;
1393 dp->ports[port_no] = port;
1394 port->port_no = u32_to_odp(port_no);
1395 seq_change(dp->port_seq);
1396 unixctl_command_reply(conn, NULL);
1400 dpif_dummy_register__(const char *type)
1402 struct dpif_class *class;
1404 class = xmalloc(sizeof *class);
1405 *class = dpif_netdev_class;
1406 class->type = xstrdup(type);
1407 dp_register_provider(class);
1411 dpif_dummy_register(bool override)
1418 dp_enumerate_types(&types);
1419 SSET_FOR_EACH (type, &types) {
1420 if (!dp_unregister_provider(type)) {
1421 dpif_dummy_register__(type);
1424 sset_destroy(&types);
1427 dpif_dummy_register__("dummy");
1429 unixctl_command_register("dpif-dummy/change-port-number",
1430 "DP PORT NEW-NUMBER",
1431 3, 3, dpif_dummy_change_port_number, NULL);