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 stats->n_masks = UINT64_MAX;
406 stats->n_mask_hit = UINT64_MAX;
407 ovs_mutex_unlock(&dp_netdev_mutex);
413 do_add_port(struct dp_netdev *dp, const char *devname, const char *type,
416 struct netdev_saved_flags *sf;
417 struct dp_netdev_port *port;
418 struct netdev *netdev;
419 struct netdev_rx *rx;
420 enum netdev_flags flags;
421 const char *open_type;
425 /* XXX reject devices already in some dp_netdev. */
427 /* Open and validate network device. */
428 open_type = dpif_netdev_port_open_type(dp->class, type);
429 error = netdev_open(devname, open_type, &netdev);
433 /* XXX reject non-Ethernet devices */
435 netdev_get_flags(netdev, &flags);
436 if (flags & NETDEV_LOOPBACK) {
437 VLOG_ERR("%s: cannot add a loopback device", devname);
438 netdev_close(netdev);
442 error = netdev_rx_open(netdev, &rx);
444 && !(error == EOPNOTSUPP && dpif_netdev_class_is_dummy(dp->class))) {
445 VLOG_ERR("%s: cannot receive packets on this network device (%s)",
446 devname, ovs_strerror(errno));
447 netdev_close(netdev);
451 error = netdev_turn_flags_on(netdev, NETDEV_PROMISC, &sf);
454 netdev_close(netdev);
458 port = xmalloc(sizeof *port);
459 port->port_no = port_no;
460 port->netdev = netdev;
463 port->type = xstrdup(type);
465 error = netdev_get_mtu(netdev, &mtu);
466 if (!error && mtu > dp->max_mtu) {
470 list_push_back(&dp->port_list, &port->node);
471 dp->ports[odp_to_u32(port_no)] = port;
472 seq_change(dp->port_seq);
478 dpif_netdev_port_add(struct dpif *dpif, struct netdev *netdev,
479 odp_port_t *port_nop)
481 struct dp_netdev *dp = get_dp_netdev(dpif);
482 char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
483 const char *dpif_port;
487 ovs_mutex_lock(&dp_netdev_mutex);
488 dpif_port = netdev_vport_get_dpif_port(netdev, namebuf, sizeof namebuf);
489 if (*port_nop != ODPP_NONE) {
490 uint32_t port_idx = odp_to_u32(*port_nop);
491 if (port_idx >= MAX_PORTS) {
493 } else if (dp->ports[port_idx]) {
500 port_no = choose_port(dp, dpif_port);
501 error = port_no == ODPP_NONE ? EFBIG : 0;
505 error = do_add_port(dp, dpif_port, netdev_get_type(netdev), port_no);
507 ovs_mutex_unlock(&dp_netdev_mutex);
513 dpif_netdev_port_del(struct dpif *dpif, odp_port_t port_no)
515 struct dp_netdev *dp = get_dp_netdev(dpif);
518 ovs_mutex_lock(&dp_netdev_mutex);
519 error = port_no == ODPP_LOCAL ? EINVAL : do_del_port(dp, port_no);
520 ovs_mutex_unlock(&dp_netdev_mutex);
526 is_valid_port_number(odp_port_t port_no)
528 return odp_to_u32(port_no) < MAX_PORTS;
532 get_port_by_number(struct dp_netdev *dp,
533 odp_port_t port_no, struct dp_netdev_port **portp)
535 if (!is_valid_port_number(port_no)) {
539 *portp = dp->ports[odp_to_u32(port_no)];
540 return *portp ? 0 : ENOENT;
545 get_port_by_name(struct dp_netdev *dp,
546 const char *devname, struct dp_netdev_port **portp)
548 struct dp_netdev_port *port;
550 LIST_FOR_EACH (port, node, &dp->port_list) {
551 if (!strcmp(netdev_get_name(port->netdev), devname)) {
560 do_del_port(struct dp_netdev *dp, odp_port_t port_no)
562 struct dp_netdev_port *port;
565 error = get_port_by_number(dp, port_no, &port);
570 list_remove(&port->node);
571 dp->ports[odp_to_u32(port_no)] = NULL;
572 seq_change(dp->port_seq);
574 netdev_close(port->netdev);
575 netdev_restore_flags(port->sf);
576 netdev_rx_close(port->rx);
584 answer_port_query(const struct dp_netdev_port *port,
585 struct dpif_port *dpif_port)
587 dpif_port->name = xstrdup(netdev_get_name(port->netdev));
588 dpif_port->type = xstrdup(port->type);
589 dpif_port->port_no = port->port_no;
593 dpif_netdev_port_query_by_number(const struct dpif *dpif, odp_port_t port_no,
594 struct dpif_port *dpif_port)
596 struct dp_netdev *dp = get_dp_netdev(dpif);
597 struct dp_netdev_port *port;
600 ovs_mutex_lock(&dp_netdev_mutex);
601 error = get_port_by_number(dp, port_no, &port);
602 if (!error && dpif_port) {
603 answer_port_query(port, dpif_port);
605 ovs_mutex_unlock(&dp_netdev_mutex);
611 dpif_netdev_port_query_by_name(const struct dpif *dpif, const char *devname,
612 struct dpif_port *dpif_port)
614 struct dp_netdev *dp = get_dp_netdev(dpif);
615 struct dp_netdev_port *port;
618 ovs_mutex_lock(&dp_netdev_mutex);
619 error = get_port_by_name(dp, devname, &port);
620 if (!error && dpif_port) {
621 answer_port_query(port, dpif_port);
623 ovs_mutex_unlock(&dp_netdev_mutex);
629 dpif_netdev_get_max_ports(const struct dpif *dpif OVS_UNUSED)
635 dp_netdev_free_flow(struct dp_netdev *dp, struct dp_netdev_flow *flow)
637 hmap_remove(&dp->flow_table, &flow->node);
643 dp_netdev_flow_flush(struct dp_netdev *dp)
645 struct dp_netdev_flow *flow, *next;
647 HMAP_FOR_EACH_SAFE (flow, next, node, &dp->flow_table) {
648 dp_netdev_free_flow(dp, flow);
653 dpif_netdev_flow_flush(struct dpif *dpif)
655 struct dp_netdev *dp = get_dp_netdev(dpif);
657 ovs_mutex_lock(&dp_netdev_mutex);
658 dp_netdev_flow_flush(dp);
659 ovs_mutex_unlock(&dp_netdev_mutex);
664 struct dp_netdev_port_state {
670 dpif_netdev_port_dump_start(const struct dpif *dpif OVS_UNUSED, void **statep)
672 *statep = xzalloc(sizeof(struct dp_netdev_port_state));
677 dpif_netdev_port_dump_next(const struct dpif *dpif, void *state_,
678 struct dpif_port *dpif_port)
680 struct dp_netdev_port_state *state = state_;
681 struct dp_netdev *dp = get_dp_netdev(dpif);
684 ovs_mutex_lock(&dp_netdev_mutex);
685 for (port_idx = odp_to_u32(state->port_no);
686 port_idx < MAX_PORTS; port_idx++) {
687 struct dp_netdev_port *port = dp->ports[port_idx];
690 state->name = xstrdup(netdev_get_name(port->netdev));
691 dpif_port->name = state->name;
692 dpif_port->type = port->type;
693 dpif_port->port_no = port->port_no;
694 state->port_no = u32_to_odp(port_idx + 1);
695 ovs_mutex_unlock(&dp_netdev_mutex);
700 ovs_mutex_unlock(&dp_netdev_mutex);
706 dpif_netdev_port_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
708 struct dp_netdev_port_state *state = state_;
715 dpif_netdev_port_poll(const struct dpif *dpif_, char **devnamep OVS_UNUSED)
717 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
718 uint64_t new_port_seq;
721 ovs_mutex_lock(&dp_netdev_mutex);
722 new_port_seq = seq_read(dpif->dp->port_seq);
723 if (dpif->last_port_seq != new_port_seq) {
724 dpif->last_port_seq = new_port_seq;
729 ovs_mutex_unlock(&dp_netdev_mutex);
735 dpif_netdev_port_poll_wait(const struct dpif *dpif_)
737 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
739 ovs_mutex_lock(&dp_netdev_mutex);
740 seq_wait(dpif->dp->port_seq, dpif->last_port_seq);
741 ovs_mutex_unlock(&dp_netdev_mutex);
744 static struct dp_netdev_flow *
745 dp_netdev_lookup_flow(const struct dp_netdev *dp, const struct flow *key)
747 struct dp_netdev_flow *flow;
749 HMAP_FOR_EACH_WITH_HASH (flow, node, flow_hash(key, 0), &dp->flow_table) {
750 if (flow_equal(&flow->key, key)) {
758 get_dpif_flow_stats(struct dp_netdev_flow *flow, struct dpif_flow_stats *stats)
760 stats->n_packets = flow->packet_count;
761 stats->n_bytes = flow->byte_count;
762 stats->used = flow->used;
763 stats->tcp_flags = flow->tcp_flags;
767 dpif_netdev_flow_from_nlattrs(const struct nlattr *key, uint32_t key_len,
772 if (odp_flow_key_to_flow(key, key_len, flow) != ODP_FIT_PERFECT) {
773 /* This should not happen: it indicates that odp_flow_key_from_flow()
774 * and odp_flow_key_to_flow() disagree on the acceptable form of a
775 * flow. Log the problem as an error, with enough details to enable
777 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
779 if (!VLOG_DROP_ERR(&rl)) {
783 odp_flow_key_format(key, key_len, &s);
784 VLOG_ERR("internal error parsing flow key %s", ds_cstr(&s));
791 in_port = flow->in_port.odp_port;
792 if (!is_valid_port_number(in_port) && in_port != ODPP_NONE) {
800 dpif_netdev_flow_get(const struct dpif *dpif,
801 const struct nlattr *nl_key, size_t nl_key_len,
802 struct ofpbuf **actionsp, struct dpif_flow_stats *stats)
804 struct dp_netdev *dp = get_dp_netdev(dpif);
805 struct dp_netdev_flow *flow;
809 error = dpif_netdev_flow_from_nlattrs(nl_key, nl_key_len, &key);
814 ovs_mutex_lock(&dp_netdev_mutex);
815 flow = dp_netdev_lookup_flow(dp, &key);
818 get_dpif_flow_stats(flow, stats);
821 *actionsp = ofpbuf_clone_data(flow->actions, flow->actions_len);
826 ovs_mutex_unlock(&dp_netdev_mutex);
832 set_flow_actions(struct dp_netdev_flow *flow,
833 const struct nlattr *actions, size_t actions_len)
835 flow->actions = xrealloc(flow->actions, actions_len);
836 flow->actions_len = actions_len;
837 memcpy(flow->actions, actions, actions_len);
842 dp_netdev_flow_add(struct dp_netdev *dp, const struct flow *key,
843 const struct nlattr *actions, size_t actions_len)
845 struct dp_netdev_flow *flow;
848 flow = xzalloc(sizeof *flow);
851 error = set_flow_actions(flow, actions, actions_len);
857 hmap_insert(&dp->flow_table, &flow->node, flow_hash(&flow->key, 0));
862 clear_stats(struct dp_netdev_flow *flow)
865 flow->packet_count = 0;
866 flow->byte_count = 0;
871 dpif_netdev_flow_put(struct dpif *dpif, const struct dpif_flow_put *put)
873 struct dp_netdev *dp = get_dp_netdev(dpif);
874 struct dp_netdev_flow *flow;
878 error = dpif_netdev_flow_from_nlattrs(put->key, put->key_len, &key);
883 ovs_mutex_lock(&dp_netdev_mutex);
884 flow = dp_netdev_lookup_flow(dp, &key);
886 if (put->flags & DPIF_FP_CREATE) {
887 if (hmap_count(&dp->flow_table) < MAX_FLOWS) {
889 memset(put->stats, 0, sizeof *put->stats);
891 error = dp_netdev_flow_add(dp, &key, put->actions,
900 if (put->flags & DPIF_FP_MODIFY) {
901 error = set_flow_actions(flow, put->actions, put->actions_len);
904 get_dpif_flow_stats(flow, put->stats);
906 if (put->flags & DPIF_FP_ZERO_STATS) {
914 ovs_mutex_unlock(&dp_netdev_mutex);
920 dpif_netdev_flow_del(struct dpif *dpif, const struct dpif_flow_del *del)
922 struct dp_netdev *dp = get_dp_netdev(dpif);
923 struct dp_netdev_flow *flow;
927 error = dpif_netdev_flow_from_nlattrs(del->key, del->key_len, &key);
932 ovs_mutex_lock(&dp_netdev_mutex);
933 flow = dp_netdev_lookup_flow(dp, &key);
936 get_dpif_flow_stats(flow, del->stats);
938 dp_netdev_free_flow(dp, flow);
942 ovs_mutex_unlock(&dp_netdev_mutex);
947 struct dp_netdev_flow_state {
950 struct nlattr *actions;
951 struct odputil_keybuf keybuf;
952 struct dpif_flow_stats stats;
956 dpif_netdev_flow_dump_start(const struct dpif *dpif OVS_UNUSED, void **statep)
958 struct dp_netdev_flow_state *state;
960 *statep = state = xmalloc(sizeof *state);
963 state->actions = NULL;
968 dpif_netdev_flow_dump_next(const struct dpif *dpif, void *state_,
969 const struct nlattr **key, size_t *key_len,
970 const struct nlattr **mask, size_t *mask_len,
971 const struct nlattr **actions, size_t *actions_len,
972 const struct dpif_flow_stats **stats)
974 struct dp_netdev_flow_state *state = state_;
975 struct dp_netdev *dp = get_dp_netdev(dpif);
976 struct dp_netdev_flow *flow;
977 struct hmap_node *node;
979 ovs_mutex_lock(&dp_netdev_mutex);
980 node = hmap_at_position(&dp->flow_table, &state->bucket, &state->offset);
982 ovs_mutex_unlock(&dp_netdev_mutex);
986 flow = CONTAINER_OF(node, struct dp_netdev_flow, node);
991 ofpbuf_use_stack(&buf, &state->keybuf, sizeof state->keybuf);
992 odp_flow_key_from_flow(&buf, &flow->key, flow->key.in_port.odp_port);
1004 free(state->actions);
1005 state->actions = xmemdup(flow->actions, flow->actions_len);
1007 *actions = state->actions;
1008 *actions_len = flow->actions_len;
1012 get_dpif_flow_stats(flow, &state->stats);
1013 *stats = &state->stats;
1016 ovs_mutex_unlock(&dp_netdev_mutex);
1021 dpif_netdev_flow_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
1023 struct dp_netdev_flow_state *state = state_;
1025 free(state->actions);
1031 dpif_netdev_execute(struct dpif *dpif, const struct dpif_execute *execute)
1033 struct dp_netdev *dp = get_dp_netdev(dpif);
1038 if (execute->packet->size < ETH_HEADER_LEN ||
1039 execute->packet->size > UINT16_MAX) {
1043 /* Make a deep copy of 'packet', because we might modify its data. */
1044 ofpbuf_init(©, DP_NETDEV_HEADROOM + execute->packet->size);
1045 ofpbuf_reserve(©, DP_NETDEV_HEADROOM);
1046 ofpbuf_put(©, execute->packet->data, execute->packet->size);
1048 flow_extract(©, 0, 0, NULL, NULL, &key);
1049 error = dpif_netdev_flow_from_nlattrs(execute->key, execute->key_len,
1052 ovs_mutex_lock(&dp_netdev_mutex);
1053 dp_netdev_execute_actions(dp, ©, &key,
1054 execute->actions, execute->actions_len);
1055 ovs_mutex_unlock(&dp_netdev_mutex);
1058 ofpbuf_uninit(©);
1063 dpif_netdev_recv_set(struct dpif *dpif OVS_UNUSED, bool enable OVS_UNUSED)
1069 dpif_netdev_queue_to_priority(const struct dpif *dpif OVS_UNUSED,
1070 uint32_t queue_id, uint32_t *priority)
1072 *priority = queue_id;
1076 static struct dp_netdev_queue *
1077 find_nonempty_queue(struct dpif *dpif)
1079 struct dp_netdev *dp = get_dp_netdev(dpif);
1082 for (i = 0; i < N_QUEUES; i++) {
1083 struct dp_netdev_queue *q = &dp->queues[i];
1084 if (q->head != q->tail) {
1092 dpif_netdev_recv(struct dpif *dpif, struct dpif_upcall *upcall,
1095 struct dp_netdev_queue *q;
1098 ovs_mutex_lock(&dp_netdev_mutex);
1099 q = find_nonempty_queue(dpif);
1101 struct dp_netdev_upcall *u = &q->upcalls[q->tail++ & QUEUE_MASK];
1103 *upcall = u->upcall;
1104 upcall->packet = buf;
1113 ovs_mutex_unlock(&dp_netdev_mutex);
1119 dpif_netdev_recv_wait(struct dpif *dpif)
1121 struct dp_netdev *dp = get_dp_netdev(dpif);
1124 ovs_mutex_lock(&dp_netdev_mutex);
1125 seq = seq_read(dp->queue_seq);
1126 if (find_nonempty_queue(dpif)) {
1127 poll_immediate_wake();
1129 seq_wait(dp->queue_seq, seq);
1131 ovs_mutex_unlock(&dp_netdev_mutex);
1135 dpif_netdev_recv_purge(struct dpif *dpif)
1137 struct dpif_netdev *dpif_netdev = dpif_netdev_cast(dpif);
1138 ovs_mutex_lock(&dp_netdev_mutex);
1139 dp_netdev_purge_queues(dpif_netdev->dp);
1140 ovs_mutex_unlock(&dp_netdev_mutex);
1144 dp_netdev_flow_used(struct dp_netdev_flow *flow, const struct ofpbuf *packet)
1146 flow->used = time_msec();
1147 flow->packet_count++;
1148 flow->byte_count += packet->size;
1149 flow->tcp_flags |= packet_get_tcp_flags(packet, &flow->key);
1153 dp_netdev_port_input(struct dp_netdev *dp, struct dp_netdev_port *port,
1154 struct ofpbuf *packet, uint32_t skb_priority,
1155 uint32_t pkt_mark, const struct flow_tnl *tnl)
1157 struct dp_netdev_flow *flow;
1159 union flow_in_port in_port_;
1161 if (packet->size < ETH_HEADER_LEN) {
1164 in_port_.odp_port = port->port_no;
1165 flow_extract(packet, skb_priority, pkt_mark, tnl, &in_port_, &key);
1166 flow = dp_netdev_lookup_flow(dp, &key);
1168 dp_netdev_flow_used(flow, packet);
1169 dp_netdev_execute_actions(dp, packet, &key,
1170 flow->actions, flow->actions_len);
1174 dp_netdev_output_userspace(dp, packet, DPIF_UC_MISS, &key, NULL);
1179 dpif_netdev_run(struct dpif *dpif)
1181 struct dp_netdev_port *port;
1182 struct dp_netdev *dp;
1183 struct ofpbuf packet;
1185 ovs_mutex_lock(&dp_netdev_mutex);
1186 dp = get_dp_netdev(dpif);
1187 ofpbuf_init(&packet,
1188 DP_NETDEV_HEADROOM + VLAN_ETH_HEADER_LEN + dp->max_mtu);
1190 LIST_FOR_EACH (port, node, &dp->port_list) {
1193 /* Reset packet contents. */
1194 ofpbuf_clear(&packet);
1195 ofpbuf_reserve(&packet, DP_NETDEV_HEADROOM);
1197 error = port->rx ? netdev_rx_recv(port->rx, &packet) : EOPNOTSUPP;
1199 dp_netdev_port_input(dp, port, &packet, 0, 0, NULL);
1200 } else if (error != EAGAIN && error != EOPNOTSUPP) {
1201 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1203 VLOG_ERR_RL(&rl, "error receiving data from %s: %s",
1204 netdev_get_name(port->netdev), ovs_strerror(error));
1207 ofpbuf_uninit(&packet);
1208 ovs_mutex_unlock(&dp_netdev_mutex);
1212 dpif_netdev_wait(struct dpif *dpif)
1214 struct dp_netdev_port *port;
1216 /* There is a race here, if thread A calls dpif_netdev_wait(dpif) and
1217 * thread B calls dpif_port_add(dpif) or dpif_port_remove(dpif) before
1218 * A makes it to poll_block().
1220 * But I think it doesn't matter:
1222 * - In the dpif_port_add() case, A will not wake up when a packet
1223 * arrives on the new port, but this would also happen if the
1224 * ordering were reversed.
1226 * - In the dpif_port_remove() case, A might wake up spuriously, but
1227 * that is harmless. */
1229 ovs_mutex_lock(&dp_netdev_mutex);
1230 LIST_FOR_EACH (port, node, &get_dp_netdev(dpif)->port_list) {
1232 netdev_rx_wait(port->rx);
1235 ovs_mutex_unlock(&dp_netdev_mutex);
1239 dp_netdev_output_port(void *dp_, struct ofpbuf *packet,
1240 const struct flow *flow OVS_UNUSED, odp_port_t out_port)
1242 struct dp_netdev *dp = dp_;
1243 struct dp_netdev_port *p = dp->ports[odp_to_u32(out_port)];
1245 netdev_send(p->netdev, packet);
1250 dp_netdev_output_userspace(struct dp_netdev *dp, const struct ofpbuf *packet,
1251 int queue_no, const struct flow *flow,
1252 const struct nlattr *userdata)
1254 struct dp_netdev_queue *q = &dp->queues[queue_no];
1255 if (q->head - q->tail < MAX_QUEUE_LEN) {
1256 struct dp_netdev_upcall *u = &q->upcalls[q->head++ & QUEUE_MASK];
1257 struct dpif_upcall *upcall = &u->upcall;
1258 struct ofpbuf *buf = &u->buf;
1261 upcall->type = queue_no;
1263 /* Allocate buffer big enough for everything. */
1264 buf_size = ODPUTIL_FLOW_KEY_BYTES + 2 + packet->size;
1266 buf_size += NLA_ALIGN(userdata->nla_len);
1268 ofpbuf_init(buf, buf_size);
1271 odp_flow_key_from_flow(buf, flow, flow->in_port.odp_port);
1272 upcall->key = buf->data;
1273 upcall->key_len = buf->size;
1277 upcall->userdata = ofpbuf_put(buf, userdata,
1278 NLA_ALIGN(userdata->nla_len));
1283 * We adjust 'data' and 'size' in 'buf' so that only the packet itself
1284 * is visible in 'upcall->packet'. The ODP flow and (if present)
1285 * userdata become part of the headroom. */
1286 ofpbuf_put_zeros(buf, 2);
1287 buf->data = ofpbuf_put(buf, packet->data, packet->size);
1288 buf->size = packet->size;
1289 upcall->packet = buf;
1291 seq_change(dp->queue_seq);
1301 dp_netdev_action_userspace(void *dp, struct ofpbuf *packet,
1302 const struct flow *key,
1303 const struct nlattr *a)
1305 const struct nlattr *userdata;
1307 userdata = nl_attr_find_nested(a, OVS_USERSPACE_ATTR_USERDATA);
1308 dp_netdev_output_userspace(dp, packet, DPIF_UC_ACTION, key, userdata);
1312 dp_netdev_execute_actions(struct dp_netdev *dp,
1313 struct ofpbuf *packet, struct flow *key,
1314 const struct nlattr *actions,
1317 odp_execute_actions(dp, packet, key, actions, actions_len,
1318 dp_netdev_output_port, dp_netdev_action_userspace);
1321 #define DPIF_NETDEV_CLASS_FUNCTIONS \
1322 dpif_netdev_enumerate, \
1323 dpif_netdev_port_open_type, \
1325 dpif_netdev_close, \
1326 dpif_netdev_destroy, \
1329 dpif_netdev_get_stats, \
1330 dpif_netdev_port_add, \
1331 dpif_netdev_port_del, \
1332 dpif_netdev_port_query_by_number, \
1333 dpif_netdev_port_query_by_name, \
1334 dpif_netdev_get_max_ports, \
1335 NULL, /* port_get_pid */ \
1336 dpif_netdev_port_dump_start, \
1337 dpif_netdev_port_dump_next, \
1338 dpif_netdev_port_dump_done, \
1339 dpif_netdev_port_poll, \
1340 dpif_netdev_port_poll_wait, \
1341 dpif_netdev_flow_get, \
1342 dpif_netdev_flow_put, \
1343 dpif_netdev_flow_del, \
1344 dpif_netdev_flow_flush, \
1345 dpif_netdev_flow_dump_start, \
1346 dpif_netdev_flow_dump_next, \
1347 dpif_netdev_flow_dump_done, \
1348 dpif_netdev_execute, \
1349 NULL, /* operate */ \
1350 dpif_netdev_recv_set, \
1351 dpif_netdev_queue_to_priority, \
1353 dpif_netdev_recv_wait, \
1354 dpif_netdev_recv_purge, \
1356 const struct dpif_class dpif_netdev_class = {
1358 DPIF_NETDEV_CLASS_FUNCTIONS
1361 const struct dpif_class dpif_planetlab_class = {
1363 DPIF_NETDEV_CLASS_FUNCTIONS
1367 dpif_dummy_change_port_number(struct unixctl_conn *conn, int argc OVS_UNUSED,
1368 const char *argv[], void *aux OVS_UNUSED)
1370 struct dp_netdev_port *port;
1371 struct dp_netdev *dp;
1374 dp = shash_find_data(&dp_netdevs, argv[1]);
1375 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
1376 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
1380 if (get_port_by_name(dp, argv[2], &port)) {
1381 unixctl_command_reply_error(conn, "unknown port");
1385 port_no = atoi(argv[3]);
1386 if (port_no <= 0 || port_no >= MAX_PORTS) {
1387 unixctl_command_reply_error(conn, "bad port number");
1390 if (dp->ports[port_no]) {
1391 unixctl_command_reply_error(conn, "port number already in use");
1394 dp->ports[odp_to_u32(port->port_no)] = NULL;
1395 dp->ports[port_no] = port;
1396 port->port_no = u32_to_odp(port_no);
1397 seq_change(dp->port_seq);
1398 unixctl_command_reply(conn, NULL);
1402 dpif_dummy_register__(const char *type)
1404 struct dpif_class *class;
1406 class = xmalloc(sizeof *class);
1407 *class = dpif_netdev_class;
1408 class->type = xstrdup(type);
1409 dp_register_provider(class);
1413 dpif_dummy_register(bool override)
1420 dp_enumerate_types(&types);
1421 SSET_FOR_EACH (type, &types) {
1422 if (!dp_unregister_provider(type)) {
1423 dpif_dummy_register__(type);
1426 sset_destroy(&types);
1429 dpif_dummy_register__("dummy");
1431 unixctl_command_register("dpif-dummy/change-port-number",
1432 "DP PORT NEW-NUMBER",
1433 3, 3, dpif_dummy_change_port_number, NULL);