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>
34 #include "classifier.h"
37 #include "dpif-provider.h"
39 #include "dynamic-string.h"
43 #include "meta-flow.h"
45 #include "netdev-vport.h"
47 #include "odp-execute.h"
49 #include "ofp-print.h"
52 #include "poll-loop.h"
62 VLOG_DEFINE_THIS_MODULE(dpif_netdev);
64 /* By default, choose a priority in the middle. */
65 #define NETDEV_RULE_PRIORITY 0x8000
67 /* Configuration parameters. */
68 enum { MAX_PORTS = 256 }; /* Maximum number of ports. */
69 enum { MAX_FLOWS = 65536 }; /* Maximum number of flows in flow table. */
71 /* Enough headroom to add a vlan tag, plus an extra 2 bytes to allow IP
72 * headers to be aligned on a 4-byte boundary. */
73 enum { DP_NETDEV_HEADROOM = 2 + VLAN_HEADER_LEN };
76 enum { N_QUEUES = 2 }; /* Number of queues for dpif_recv(). */
77 enum { MAX_QUEUE_LEN = 128 }; /* Maximum number of packets per queue. */
78 enum { QUEUE_MASK = MAX_QUEUE_LEN - 1 };
79 BUILD_ASSERT_DECL(IS_POW2(MAX_QUEUE_LEN));
81 struct dp_netdev_upcall {
82 struct dpif_upcall upcall; /* Queued upcall information. */
83 struct ofpbuf buf; /* ofpbuf instance for upcall.packet. */
86 struct dp_netdev_queue {
87 struct dp_netdev_upcall upcalls[MAX_QUEUE_LEN];
88 unsigned int head, tail;
91 /* Datapath based on the network device interface from netdev.h. */
93 const struct dpif_class *class;
97 int max_mtu; /* Maximum MTU of any port added so far. */
99 struct dp_netdev_queue queues[N_QUEUES];
100 struct classifier cls; /* Classifier. */
101 struct hmap flow_table; /* Flow table. */
102 struct seq *queue_seq; /* Incremented whenever a packet is queued. */
105 long long int n_hit; /* Number of flow table matches. */
106 long long int n_missed; /* Number of flow table misses. */
107 long long int n_lost; /* Number of misses not passed to client. */
110 struct dp_netdev_port *ports[MAX_PORTS];
111 struct list port_list;
112 struct seq *port_seq; /* Incremented whenever a port changes. */
115 /* A port in a netdev-based datapath. */
116 struct dp_netdev_port {
117 odp_port_t port_no; /* Index into dp_netdev's 'ports'. */
118 struct list node; /* Element in dp_netdev's 'port_list'. */
119 struct netdev *netdev;
120 struct netdev_saved_flags *sf;
121 struct netdev_rx *rx;
122 char *type; /* Port type as requested by user. */
125 /* A flow in dp_netdev's 'flow_table'. */
126 struct dp_netdev_flow {
127 /* Packet classification. */
128 struct cls_rule cr; /* In owning dp_netdev's 'cls'. */
130 /* Hash table index by unmasked flow.*/
131 struct hmap_node node; /* In owning dp_netdev's 'flow_table'. */
132 struct flow flow; /* The flow that created this entry. */
135 long long int used; /* Last used time, in monotonic msecs. */
136 long long int packet_count; /* Number of packets matched. */
137 long long int byte_count; /* Number of bytes matched. */
138 uint16_t tcp_flags; /* Bitwise-OR of seen tcp_flags values. */
141 struct nlattr *actions;
145 /* Interface to netdev-based datapath. */
148 struct dp_netdev *dp;
149 uint64_t last_port_seq;
152 /* All netdev-based datapaths. */
153 static struct shash dp_netdevs = SHASH_INITIALIZER(&dp_netdevs);
155 /* Global lock for all data. */
156 static struct ovs_mutex dp_netdev_mutex = OVS_MUTEX_INITIALIZER;
158 static int get_port_by_number(struct dp_netdev *, odp_port_t port_no,
159 struct dp_netdev_port **portp);
160 static int get_port_by_name(struct dp_netdev *, const char *devname,
161 struct dp_netdev_port **portp);
162 static void dp_netdev_free(struct dp_netdev *);
163 static void dp_netdev_flow_flush(struct dp_netdev *);
164 static int do_add_port(struct dp_netdev *, const char *devname,
165 const char *type, odp_port_t port_no);
166 static int do_del_port(struct dp_netdev *, odp_port_t port_no);
167 static int dpif_netdev_open(const struct dpif_class *, const char *name,
168 bool create, struct dpif **);
169 static int dp_netdev_output_userspace(struct dp_netdev *, struct ofpbuf *,
170 int queue_no, const struct flow *,
171 const struct nlattr *userdata);
172 static void dp_netdev_execute_actions(struct dp_netdev *, const struct flow *,
174 const struct nlattr *actions,
176 static void dp_netdev_port_input(struct dp_netdev *dp,
177 struct dp_netdev_port *port,
178 struct ofpbuf *packet);
180 static struct dpif_netdev *
181 dpif_netdev_cast(const struct dpif *dpif)
183 ovs_assert(dpif->dpif_class->open == dpif_netdev_open);
184 return CONTAINER_OF(dpif, struct dpif_netdev, dpif);
187 static struct dp_netdev *
188 get_dp_netdev(const struct dpif *dpif)
190 return dpif_netdev_cast(dpif)->dp;
194 dpif_netdev_enumerate(struct sset *all_dps)
196 struct shash_node *node;
198 ovs_mutex_lock(&dp_netdev_mutex);
199 SHASH_FOR_EACH(node, &dp_netdevs) {
200 sset_add(all_dps, node->name);
202 ovs_mutex_unlock(&dp_netdev_mutex);
208 dpif_netdev_class_is_dummy(const struct dpif_class *class)
210 return class != &dpif_netdev_class;
214 dpif_netdev_port_open_type(const struct dpif_class *class, const char *type)
216 return strcmp(type, "internal") ? type
217 : dpif_netdev_class_is_dummy(class) ? "dummy"
222 create_dpif_netdev(struct dp_netdev *dp)
224 uint16_t netflow_id = hash_string(dp->name, 0);
225 struct dpif_netdev *dpif;
229 dpif = xmalloc(sizeof *dpif);
230 dpif_init(&dpif->dpif, dp->class, dp->name, netflow_id >> 8, netflow_id);
232 dpif->last_port_seq = seq_read(dp->port_seq);
237 /* Choose an unused, non-zero port number and return it on success.
238 * Return ODPP_NONE on failure. */
240 choose_port(struct dp_netdev *dp, const char *name)
244 if (dp->class != &dpif_netdev_class) {
248 /* If the port name begins with "br", start the number search at
249 * 100 to make writing tests easier. */
250 if (!strncmp(name, "br", 2)) {
254 /* If the port name contains a number, try to assign that port number.
255 * This can make writing unit tests easier because port numbers are
257 for (p = name; *p != '\0'; p++) {
258 if (isdigit((unsigned char) *p)) {
259 port_no = start_no + strtol(p, NULL, 10);
260 if (port_no > 0 && port_no < MAX_PORTS
261 && !dp->ports[port_no]) {
262 return u32_to_odp(port_no);
269 for (port_no = 1; port_no < MAX_PORTS; port_no++) {
270 if (!dp->ports[port_no]) {
271 return u32_to_odp(port_no);
279 create_dp_netdev(const char *name, const struct dpif_class *class,
280 struct dp_netdev **dpp)
282 struct dp_netdev *dp;
286 dp = xzalloc(sizeof *dp);
288 dp->name = xstrdup(name);
290 dp->max_mtu = ETH_PAYLOAD_MAX;
291 for (i = 0; i < N_QUEUES; i++) {
292 dp->queues[i].head = dp->queues[i].tail = 0;
294 dp->queue_seq = seq_create();
295 classifier_init(&dp->cls, NULL);
296 hmap_init(&dp->flow_table);
297 list_init(&dp->port_list);
298 dp->port_seq = seq_create();
300 error = do_add_port(dp, name, "internal", ODPP_LOCAL);
306 shash_add(&dp_netdevs, name, dp);
313 dpif_netdev_open(const struct dpif_class *class, const char *name,
314 bool create, struct dpif **dpifp)
316 struct dp_netdev *dp;
319 ovs_mutex_lock(&dp_netdev_mutex);
320 dp = shash_find_data(&dp_netdevs, name);
322 error = create ? create_dp_netdev(name, class, &dp) : ENODEV;
324 error = (dp->class != class ? EINVAL
329 *dpifp = create_dpif_netdev(dp);
331 ovs_mutex_unlock(&dp_netdev_mutex);
337 dp_netdev_purge_queues(struct dp_netdev *dp)
341 for (i = 0; i < N_QUEUES; i++) {
342 struct dp_netdev_queue *q = &dp->queues[i];
344 while (q->tail != q->head) {
345 struct dp_netdev_upcall *u = &q->upcalls[q->tail++ & QUEUE_MASK];
346 ofpbuf_uninit(&u->upcall.packet);
347 ofpbuf_uninit(&u->buf);
353 dp_netdev_free(struct dp_netdev *dp)
355 struct dp_netdev_port *port, *next;
357 dp_netdev_flow_flush(dp);
358 LIST_FOR_EACH_SAFE (port, next, node, &dp->port_list) {
359 do_del_port(dp, port->port_no);
361 dp_netdev_purge_queues(dp);
362 seq_destroy(dp->queue_seq);
363 classifier_destroy(&dp->cls);
364 hmap_destroy(&dp->flow_table);
365 seq_destroy(dp->port_seq);
371 dpif_netdev_close(struct dpif *dpif)
373 struct dp_netdev *dp = get_dp_netdev(dpif);
375 ovs_mutex_lock(&dp_netdev_mutex);
377 ovs_assert(dp->open_cnt > 0);
378 if (--dp->open_cnt == 0 && dp->destroyed) {
379 shash_find_and_delete(&dp_netdevs, dp->name);
384 ovs_mutex_unlock(&dp_netdev_mutex);
388 dpif_netdev_destroy(struct dpif *dpif)
390 struct dp_netdev *dp = get_dp_netdev(dpif);
392 ovs_mutex_lock(&dp_netdev_mutex);
393 dp->destroyed = true;
394 ovs_mutex_unlock(&dp_netdev_mutex);
400 dpif_netdev_get_stats(const struct dpif *dpif, struct dpif_dp_stats *stats)
402 struct dp_netdev *dp = get_dp_netdev(dpif);
404 ovs_mutex_lock(&dp_netdev_mutex);
405 stats->n_flows = hmap_count(&dp->flow_table);
406 stats->n_hit = dp->n_hit;
407 stats->n_missed = dp->n_missed;
408 stats->n_lost = dp->n_lost;
409 stats->n_masks = UINT32_MAX;
410 stats->n_mask_hit = UINT64_MAX;
411 ovs_mutex_unlock(&dp_netdev_mutex);
417 do_add_port(struct dp_netdev *dp, const char *devname, const char *type,
420 struct netdev_saved_flags *sf;
421 struct dp_netdev_port *port;
422 struct netdev *netdev;
423 struct netdev_rx *rx;
424 enum netdev_flags flags;
425 const char *open_type;
429 /* XXX reject devices already in some dp_netdev. */
431 /* Open and validate network device. */
432 open_type = dpif_netdev_port_open_type(dp->class, type);
433 error = netdev_open(devname, open_type, &netdev);
437 /* XXX reject non-Ethernet devices */
439 netdev_get_flags(netdev, &flags);
440 if (flags & NETDEV_LOOPBACK) {
441 VLOG_ERR("%s: cannot add a loopback device", devname);
442 netdev_close(netdev);
446 error = netdev_rx_open(netdev, &rx);
448 && !(error == EOPNOTSUPP && dpif_netdev_class_is_dummy(dp->class))) {
449 VLOG_ERR("%s: cannot receive packets on this network device (%s)",
450 devname, ovs_strerror(errno));
451 netdev_close(netdev);
455 error = netdev_turn_flags_on(netdev, NETDEV_PROMISC, &sf);
458 netdev_close(netdev);
462 port = xmalloc(sizeof *port);
463 port->port_no = port_no;
464 port->netdev = netdev;
467 port->type = xstrdup(type);
469 error = netdev_get_mtu(netdev, &mtu);
470 if (!error && mtu > dp->max_mtu) {
474 list_push_back(&dp->port_list, &port->node);
475 dp->ports[odp_to_u32(port_no)] = port;
476 seq_change(dp->port_seq);
482 dpif_netdev_port_add(struct dpif *dpif, struct netdev *netdev,
483 odp_port_t *port_nop)
485 struct dp_netdev *dp = get_dp_netdev(dpif);
486 char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
487 const char *dpif_port;
491 ovs_mutex_lock(&dp_netdev_mutex);
492 dpif_port = netdev_vport_get_dpif_port(netdev, namebuf, sizeof namebuf);
493 if (*port_nop != ODPP_NONE) {
494 uint32_t port_idx = odp_to_u32(*port_nop);
495 if (port_idx >= MAX_PORTS) {
497 } else if (dp->ports[port_idx]) {
504 port_no = choose_port(dp, dpif_port);
505 error = port_no == ODPP_NONE ? EFBIG : 0;
509 error = do_add_port(dp, dpif_port, netdev_get_type(netdev), port_no);
511 ovs_mutex_unlock(&dp_netdev_mutex);
517 dpif_netdev_port_del(struct dpif *dpif, odp_port_t port_no)
519 struct dp_netdev *dp = get_dp_netdev(dpif);
522 ovs_mutex_lock(&dp_netdev_mutex);
523 error = port_no == ODPP_LOCAL ? EINVAL : do_del_port(dp, port_no);
524 ovs_mutex_unlock(&dp_netdev_mutex);
530 is_valid_port_number(odp_port_t port_no)
532 return odp_to_u32(port_no) < MAX_PORTS;
536 get_port_by_number(struct dp_netdev *dp,
537 odp_port_t port_no, struct dp_netdev_port **portp)
539 if (!is_valid_port_number(port_no)) {
543 *portp = dp->ports[odp_to_u32(port_no)];
544 return *portp ? 0 : ENOENT;
549 get_port_by_name(struct dp_netdev *dp,
550 const char *devname, struct dp_netdev_port **portp)
552 struct dp_netdev_port *port;
554 LIST_FOR_EACH (port, node, &dp->port_list) {
555 if (!strcmp(netdev_get_name(port->netdev), devname)) {
564 do_del_port(struct dp_netdev *dp, odp_port_t port_no)
566 struct dp_netdev_port *port;
569 error = get_port_by_number(dp, port_no, &port);
574 list_remove(&port->node);
575 dp->ports[odp_to_u32(port_no)] = NULL;
576 seq_change(dp->port_seq);
578 netdev_close(port->netdev);
579 netdev_restore_flags(port->sf);
580 netdev_rx_close(port->rx);
588 answer_port_query(const struct dp_netdev_port *port,
589 struct dpif_port *dpif_port)
591 dpif_port->name = xstrdup(netdev_get_name(port->netdev));
592 dpif_port->type = xstrdup(port->type);
593 dpif_port->port_no = port->port_no;
597 dpif_netdev_port_query_by_number(const struct dpif *dpif, odp_port_t port_no,
598 struct dpif_port *dpif_port)
600 struct dp_netdev *dp = get_dp_netdev(dpif);
601 struct dp_netdev_port *port;
604 ovs_mutex_lock(&dp_netdev_mutex);
605 error = get_port_by_number(dp, port_no, &port);
606 if (!error && dpif_port) {
607 answer_port_query(port, dpif_port);
609 ovs_mutex_unlock(&dp_netdev_mutex);
615 dpif_netdev_port_query_by_name(const struct dpif *dpif, const char *devname,
616 struct dpif_port *dpif_port)
618 struct dp_netdev *dp = get_dp_netdev(dpif);
619 struct dp_netdev_port *port;
622 ovs_mutex_lock(&dp_netdev_mutex);
623 error = get_port_by_name(dp, devname, &port);
624 if (!error && dpif_port) {
625 answer_port_query(port, dpif_port);
627 ovs_mutex_unlock(&dp_netdev_mutex);
633 dpif_netdev_get_max_ports(const struct dpif *dpif OVS_UNUSED)
639 dp_netdev_free_flow(struct dp_netdev *dp, struct dp_netdev_flow *netdev_flow)
641 fat_rwlock_wrlock(&dp->cls.rwlock);
642 classifier_remove(&dp->cls, &netdev_flow->cr);
643 fat_rwlock_unlock(&dp->cls.rwlock);
644 cls_rule_destroy(&netdev_flow->cr);
646 hmap_remove(&dp->flow_table, &netdev_flow->node);
647 free(netdev_flow->actions);
652 dp_netdev_flow_flush(struct dp_netdev *dp)
654 struct dp_netdev_flow *netdev_flow, *next;
656 HMAP_FOR_EACH_SAFE (netdev_flow, next, node, &dp->flow_table) {
657 dp_netdev_free_flow(dp, netdev_flow);
662 dpif_netdev_flow_flush(struct dpif *dpif)
664 struct dp_netdev *dp = get_dp_netdev(dpif);
666 ovs_mutex_lock(&dp_netdev_mutex);
667 dp_netdev_flow_flush(dp);
668 ovs_mutex_unlock(&dp_netdev_mutex);
673 struct dp_netdev_port_state {
679 dpif_netdev_port_dump_start(const struct dpif *dpif OVS_UNUSED, void **statep)
681 *statep = xzalloc(sizeof(struct dp_netdev_port_state));
686 dpif_netdev_port_dump_next(const struct dpif *dpif, void *state_,
687 struct dpif_port *dpif_port)
689 struct dp_netdev_port_state *state = state_;
690 struct dp_netdev *dp = get_dp_netdev(dpif);
693 ovs_mutex_lock(&dp_netdev_mutex);
694 for (port_idx = odp_to_u32(state->port_no);
695 port_idx < MAX_PORTS; port_idx++) {
696 struct dp_netdev_port *port = dp->ports[port_idx];
699 state->name = xstrdup(netdev_get_name(port->netdev));
700 dpif_port->name = state->name;
701 dpif_port->type = port->type;
702 dpif_port->port_no = port->port_no;
703 state->port_no = u32_to_odp(port_idx + 1);
704 ovs_mutex_unlock(&dp_netdev_mutex);
709 ovs_mutex_unlock(&dp_netdev_mutex);
715 dpif_netdev_port_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
717 struct dp_netdev_port_state *state = state_;
724 dpif_netdev_port_poll(const struct dpif *dpif_, char **devnamep OVS_UNUSED)
726 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
727 uint64_t new_port_seq;
730 ovs_mutex_lock(&dp_netdev_mutex);
731 new_port_seq = seq_read(dpif->dp->port_seq);
732 if (dpif->last_port_seq != new_port_seq) {
733 dpif->last_port_seq = new_port_seq;
738 ovs_mutex_unlock(&dp_netdev_mutex);
744 dpif_netdev_port_poll_wait(const struct dpif *dpif_)
746 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
748 ovs_mutex_lock(&dp_netdev_mutex);
749 seq_wait(dpif->dp->port_seq, dpif->last_port_seq);
750 ovs_mutex_unlock(&dp_netdev_mutex);
753 static struct dp_netdev_flow *
754 dp_netdev_lookup_flow(const struct dp_netdev *dp, const struct flow *flow)
758 fat_rwlock_wrlock(&dp->cls.rwlock);
759 cr = classifier_lookup(&dp->cls, flow, NULL);
760 fat_rwlock_unlock(&dp->cls.rwlock);
763 ? CONTAINER_OF(cr, struct dp_netdev_flow, cr)
767 static struct dp_netdev_flow *
768 dp_netdev_find_flow(const struct dp_netdev *dp, const struct flow *flow)
770 struct dp_netdev_flow *netdev_flow;
772 HMAP_FOR_EACH_WITH_HASH (netdev_flow, node, flow_hash(flow, 0),
774 if (flow_equal(&netdev_flow->flow, flow)) {
782 get_dpif_flow_stats(struct dp_netdev_flow *netdev_flow,
783 struct dpif_flow_stats *stats)
785 stats->n_packets = netdev_flow->packet_count;
786 stats->n_bytes = netdev_flow->byte_count;
787 stats->used = netdev_flow->used;
788 stats->tcp_flags = netdev_flow->tcp_flags;
792 dpif_netdev_mask_from_nlattrs(const struct nlattr *key, uint32_t key_len,
793 const struct nlattr *mask_key,
794 uint32_t mask_key_len, const struct flow *flow,
798 if (odp_flow_key_to_mask(mask_key, mask_key_len, mask, flow)) {
799 /* This should not happen: it indicates that
800 * odp_flow_key_from_mask() and odp_flow_key_to_mask()
801 * disagree on the acceptable form of a mask. Log the problem
802 * as an error, with enough details to enable debugging. */
803 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
805 if (!VLOG_DROP_ERR(&rl)) {
809 odp_flow_format(key, key_len, mask_key, mask_key_len, NULL, &s,
811 VLOG_ERR("internal error parsing flow mask %s", ds_cstr(&s));
819 /* No mask key, unwildcard everything except fields whose
820 * prerequisities are not met. */
821 memset(mask, 0x0, sizeof *mask);
823 for (id = 0; id < MFF_N_IDS; ++id) {
824 /* Skip registers and metadata. */
825 if (!(id >= MFF_REG0 && id < MFF_REG0 + FLOW_N_REGS)
826 && id != MFF_METADATA) {
827 const struct mf_field *mf = mf_from_id(id);
828 if (mf_are_prereqs_ok(mf, flow)) {
829 mf_mask_field(mf, mask);
835 /* Force unwildcard the in_port.
837 * We need to do this even in the case where we unwildcard "everything"
838 * above because "everything" only includes the 16-bit OpenFlow port number
839 * mask->in_port.ofp_port, which only covers half of the 32-bit datapath
840 * port number mask->in_port.odp_port. */
841 mask->in_port.odp_port = u32_to_odp(UINT32_MAX);
847 dpif_netdev_flow_from_nlattrs(const struct nlattr *key, uint32_t key_len,
852 if (odp_flow_key_to_flow(key, key_len, flow)) {
853 /* This should not happen: it indicates that odp_flow_key_from_flow()
854 * and odp_flow_key_to_flow() disagree on the acceptable form of a
855 * flow. Log the problem as an error, with enough details to enable
857 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
859 if (!VLOG_DROP_ERR(&rl)) {
863 odp_flow_format(key, key_len, NULL, 0, NULL, &s, true);
864 VLOG_ERR("internal error parsing flow key %s", ds_cstr(&s));
871 in_port = flow->in_port.odp_port;
872 if (!is_valid_port_number(in_port) && in_port != ODPP_NONE) {
880 dpif_netdev_flow_get(const struct dpif *dpif,
881 const struct nlattr *nl_key, size_t nl_key_len,
882 struct ofpbuf **actionsp, struct dpif_flow_stats *stats)
884 struct dp_netdev *dp = get_dp_netdev(dpif);
885 struct dp_netdev_flow *netdev_flow;
889 error = dpif_netdev_flow_from_nlattrs(nl_key, nl_key_len, &key);
894 ovs_mutex_lock(&dp_netdev_mutex);
895 netdev_flow = dp_netdev_find_flow(dp, &key);
898 get_dpif_flow_stats(netdev_flow, stats);
901 *actionsp = ofpbuf_clone_data(netdev_flow->actions,
902 netdev_flow->actions_len);
907 ovs_mutex_unlock(&dp_netdev_mutex);
913 set_flow_actions(struct dp_netdev_flow *netdev_flow,
914 const struct nlattr *actions, size_t actions_len)
916 netdev_flow->actions = xrealloc(netdev_flow->actions, actions_len);
917 netdev_flow->actions_len = actions_len;
918 memcpy(netdev_flow->actions, actions, actions_len);
923 dp_netdev_flow_add(struct dp_netdev *dp, const struct flow *flow,
924 const struct flow_wildcards *wc,
925 const struct nlattr *actions,
928 struct dp_netdev_flow *netdev_flow;
932 netdev_flow = xzalloc(sizeof *netdev_flow);
933 netdev_flow->flow = *flow;
935 match_init(&match, flow, wc);
936 cls_rule_init(&netdev_flow->cr, &match, NETDEV_RULE_PRIORITY);
937 fat_rwlock_wrlock(&dp->cls.rwlock);
938 classifier_insert(&dp->cls, &netdev_flow->cr);
939 fat_rwlock_unlock(&dp->cls.rwlock);
941 error = set_flow_actions(netdev_flow, actions, actions_len);
943 fat_rwlock_wrlock(&dp->cls.rwlock);
944 classifier_remove(&dp->cls, &netdev_flow->cr);
945 fat_rwlock_unlock(&dp->cls.rwlock);
946 cls_rule_destroy(&netdev_flow->cr);
952 hmap_insert(&dp->flow_table, &netdev_flow->node, flow_hash(flow, 0));
957 clear_stats(struct dp_netdev_flow *netdev_flow)
959 netdev_flow->used = 0;
960 netdev_flow->packet_count = 0;
961 netdev_flow->byte_count = 0;
962 netdev_flow->tcp_flags = 0;
966 dpif_netdev_flow_put(struct dpif *dpif, const struct dpif_flow_put *put)
968 struct dp_netdev *dp = get_dp_netdev(dpif);
969 struct dp_netdev_flow *netdev_flow;
971 struct flow_wildcards wc;
974 error = dpif_netdev_flow_from_nlattrs(put->key, put->key_len, &flow);
978 error = dpif_netdev_mask_from_nlattrs(put->key, put->key_len,
979 put->mask, put->mask_len,
985 ovs_mutex_lock(&dp_netdev_mutex);
986 netdev_flow = dp_netdev_lookup_flow(dp, &flow);
988 if (put->flags & DPIF_FP_CREATE) {
989 if (hmap_count(&dp->flow_table) < MAX_FLOWS) {
991 memset(put->stats, 0, sizeof *put->stats);
993 error = dp_netdev_flow_add(dp, &flow, &wc, put->actions,
1002 if (put->flags & DPIF_FP_MODIFY
1003 && flow_equal(&flow, &netdev_flow->flow)) {
1004 error = set_flow_actions(netdev_flow, put->actions,
1008 get_dpif_flow_stats(netdev_flow, put->stats);
1010 if (put->flags & DPIF_FP_ZERO_STATS) {
1011 clear_stats(netdev_flow);
1014 } else if (put->flags & DPIF_FP_CREATE) {
1017 /* Overlapping flow. */
1021 ovs_mutex_unlock(&dp_netdev_mutex);
1027 dpif_netdev_flow_del(struct dpif *dpif, const struct dpif_flow_del *del)
1029 struct dp_netdev *dp = get_dp_netdev(dpif);
1030 struct dp_netdev_flow *netdev_flow;
1034 error = dpif_netdev_flow_from_nlattrs(del->key, del->key_len, &key);
1039 ovs_mutex_lock(&dp_netdev_mutex);
1040 netdev_flow = dp_netdev_find_flow(dp, &key);
1043 get_dpif_flow_stats(netdev_flow, del->stats);
1045 dp_netdev_free_flow(dp, netdev_flow);
1049 ovs_mutex_unlock(&dp_netdev_mutex);
1054 struct dp_netdev_flow_state {
1057 struct nlattr *actions;
1058 struct odputil_keybuf keybuf;
1059 struct odputil_keybuf maskbuf;
1060 struct dpif_flow_stats stats;
1064 dpif_netdev_flow_dump_start(const struct dpif *dpif OVS_UNUSED, void **statep)
1066 struct dp_netdev_flow_state *state;
1068 *statep = state = xmalloc(sizeof *state);
1071 state->actions = NULL;
1076 dpif_netdev_flow_dump_next(const struct dpif *dpif, void *state_,
1077 const struct nlattr **key, size_t *key_len,
1078 const struct nlattr **mask, size_t *mask_len,
1079 const struct nlattr **actions, size_t *actions_len,
1080 const struct dpif_flow_stats **stats)
1082 struct dp_netdev_flow_state *state = state_;
1083 struct dp_netdev *dp = get_dp_netdev(dpif);
1084 struct dp_netdev_flow *netdev_flow;
1085 struct hmap_node *node;
1087 ovs_mutex_lock(&dp_netdev_mutex);
1088 node = hmap_at_position(&dp->flow_table, &state->bucket, &state->offset);
1090 ovs_mutex_unlock(&dp_netdev_mutex);
1094 netdev_flow = CONTAINER_OF(node, struct dp_netdev_flow, node);
1099 ofpbuf_use_stack(&buf, &state->keybuf, sizeof state->keybuf);
1100 odp_flow_key_from_flow(&buf, &netdev_flow->flow,
1101 netdev_flow->flow.in_port.odp_port);
1104 *key_len = buf.size;
1109 struct flow_wildcards wc;
1111 ofpbuf_use_stack(&buf, &state->maskbuf, sizeof state->maskbuf);
1112 minimask_expand(&netdev_flow->cr.match.mask, &wc);
1113 odp_flow_key_from_mask(&buf, &wc.masks, &netdev_flow->flow,
1114 odp_to_u32(wc.masks.in_port.odp_port));
1117 *mask_len = buf.size;
1121 free(state->actions);
1122 state->actions = xmemdup(netdev_flow->actions,
1123 netdev_flow->actions_len);
1125 *actions = state->actions;
1126 *actions_len = netdev_flow->actions_len;
1130 get_dpif_flow_stats(netdev_flow, &state->stats);
1131 *stats = &state->stats;
1134 ovs_mutex_unlock(&dp_netdev_mutex);
1139 dpif_netdev_flow_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
1141 struct dp_netdev_flow_state *state = state_;
1143 free(state->actions);
1149 dpif_netdev_execute(struct dpif *dpif, const struct dpif_execute *execute)
1151 struct dp_netdev *dp = get_dp_netdev(dpif);
1155 if (execute->packet->size < ETH_HEADER_LEN ||
1156 execute->packet->size > UINT16_MAX) {
1160 /* Get packet metadata. */
1161 error = dpif_netdev_flow_from_nlattrs(execute->key, execute->key_len, &md);
1165 /* Extract flow key. */
1166 flow_extract(execute->packet, md.skb_priority, md.pkt_mark, &md.tunnel,
1168 ovs_mutex_lock(&dp_netdev_mutex);
1169 dp_netdev_execute_actions(dp, &key, execute->packet,
1170 execute->actions, execute->actions_len);
1171 ovs_mutex_unlock(&dp_netdev_mutex);
1177 dpif_netdev_recv_set(struct dpif *dpif OVS_UNUSED, bool enable OVS_UNUSED)
1183 dpif_netdev_queue_to_priority(const struct dpif *dpif OVS_UNUSED,
1184 uint32_t queue_id, uint32_t *priority)
1186 *priority = queue_id;
1190 static struct dp_netdev_queue *
1191 find_nonempty_queue(struct dpif *dpif)
1193 struct dp_netdev *dp = get_dp_netdev(dpif);
1196 for (i = 0; i < N_QUEUES; i++) {
1197 struct dp_netdev_queue *q = &dp->queues[i];
1198 if (q->head != q->tail) {
1206 dpif_netdev_recv(struct dpif *dpif, struct dpif_upcall *upcall,
1209 struct dp_netdev_queue *q;
1212 ovs_mutex_lock(&dp_netdev_mutex);
1213 q = find_nonempty_queue(dpif);
1215 struct dp_netdev_upcall *u = &q->upcalls[q->tail++ & QUEUE_MASK];
1217 *upcall = u->upcall;
1226 ovs_mutex_unlock(&dp_netdev_mutex);
1232 dpif_netdev_recv_wait(struct dpif *dpif)
1234 struct dp_netdev *dp = get_dp_netdev(dpif);
1237 ovs_mutex_lock(&dp_netdev_mutex);
1238 seq = seq_read(dp->queue_seq);
1239 if (find_nonempty_queue(dpif)) {
1240 poll_immediate_wake();
1242 seq_wait(dp->queue_seq, seq);
1244 ovs_mutex_unlock(&dp_netdev_mutex);
1248 dpif_netdev_recv_purge(struct dpif *dpif)
1250 struct dpif_netdev *dpif_netdev = dpif_netdev_cast(dpif);
1251 ovs_mutex_lock(&dp_netdev_mutex);
1252 dp_netdev_purge_queues(dpif_netdev->dp);
1253 ovs_mutex_unlock(&dp_netdev_mutex);
1257 dp_netdev_flow_used(struct dp_netdev_flow *netdev_flow,
1258 const struct ofpbuf *packet,
1259 const struct flow *key)
1261 netdev_flow->used = time_msec();
1262 netdev_flow->packet_count++;
1263 netdev_flow->byte_count += packet->size;
1264 netdev_flow->tcp_flags |= packet_get_tcp_flags(packet, key);
1268 dp_netdev_port_input(struct dp_netdev *dp, struct dp_netdev_port *port,
1269 struct ofpbuf *packet)
1271 struct dp_netdev_flow *netdev_flow;
1273 union flow_in_port in_port_;
1275 if (packet->size < ETH_HEADER_LEN) {
1278 in_port_.odp_port = port->port_no;
1279 flow_extract(packet, 0, 0, NULL, &in_port_, &key);
1280 netdev_flow = dp_netdev_lookup_flow(dp, &key);
1282 dp_netdev_flow_used(netdev_flow, packet, &key);
1283 dp_netdev_execute_actions(dp, &key, packet,
1284 netdev_flow->actions,
1285 netdev_flow->actions_len);
1289 dp_netdev_output_userspace(dp, packet, DPIF_UC_MISS, &key, NULL);
1294 dpif_netdev_run(struct dpif *dpif)
1296 struct dp_netdev_port *port;
1297 struct dp_netdev *dp;
1298 struct ofpbuf packet;
1301 ovs_mutex_lock(&dp_netdev_mutex);
1302 dp = get_dp_netdev(dpif);
1303 ofpbuf_init(&packet, 0);
1305 buf_size = DP_NETDEV_HEADROOM + VLAN_ETH_HEADER_LEN + dp->max_mtu;
1307 LIST_FOR_EACH (port, node, &dp->port_list) {
1310 /* Reset packet contents. Packet data may have been stolen. */
1311 ofpbuf_clear(&packet);
1312 ofpbuf_reserve_with_tailroom(&packet, DP_NETDEV_HEADROOM, buf_size);
1314 error = port->rx ? netdev_rx_recv(port->rx, &packet) : EOPNOTSUPP;
1316 dp_netdev_port_input(dp, port, &packet);
1317 } else if (error != EAGAIN && error != EOPNOTSUPP) {
1318 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1320 VLOG_ERR_RL(&rl, "error receiving data from %s: %s",
1321 netdev_get_name(port->netdev), ovs_strerror(error));
1324 ofpbuf_uninit(&packet);
1325 ovs_mutex_unlock(&dp_netdev_mutex);
1329 dpif_netdev_wait(struct dpif *dpif)
1331 struct dp_netdev_port *port;
1333 /* There is a race here, if thread A calls dpif_netdev_wait(dpif) and
1334 * thread B calls dpif_port_add(dpif) or dpif_port_remove(dpif) before
1335 * A makes it to poll_block().
1337 * But I think it doesn't matter:
1339 * - In the dpif_port_add() case, A will not wake up when a packet
1340 * arrives on the new port, but this would also happen if the
1341 * ordering were reversed.
1343 * - In the dpif_port_remove() case, A might wake up spuriously, but
1344 * that is harmless. */
1346 ovs_mutex_lock(&dp_netdev_mutex);
1347 LIST_FOR_EACH (port, node, &get_dp_netdev(dpif)->port_list) {
1349 netdev_rx_wait(port->rx);
1352 ovs_mutex_unlock(&dp_netdev_mutex);
1356 dp_netdev_output_userspace(struct dp_netdev *dp, struct ofpbuf *packet,
1357 int queue_no, const struct flow *flow,
1358 const struct nlattr *userdata)
1360 struct dp_netdev_queue *q = &dp->queues[queue_no];
1361 if (q->head - q->tail < MAX_QUEUE_LEN) {
1362 struct dp_netdev_upcall *u = &q->upcalls[q->head++ & QUEUE_MASK];
1363 struct dpif_upcall *upcall = &u->upcall;
1364 struct ofpbuf *buf = &u->buf;
1367 upcall->type = queue_no;
1369 /* Allocate buffer big enough for everything. */
1370 buf_size = ODPUTIL_FLOW_KEY_BYTES;
1372 buf_size += NLA_ALIGN(userdata->nla_len);
1374 ofpbuf_init(buf, buf_size);
1377 odp_flow_key_from_flow(buf, flow, flow->in_port.odp_port);
1378 upcall->key = buf->data;
1379 upcall->key_len = buf->size;
1383 upcall->userdata = ofpbuf_put(buf, userdata,
1384 NLA_ALIGN(userdata->nla_len));
1387 /* Steal packet data. */
1388 ovs_assert(packet->source == OFPBUF_MALLOC);
1389 upcall->packet = *packet;
1390 ofpbuf_use(packet, NULL, 0);
1392 seq_change(dp->queue_seq);
1401 struct dp_netdev_execute_aux {
1402 struct dp_netdev *dp;
1403 const struct flow *key;
1407 dp_netdev_action_output(void *aux_, struct ofpbuf *packet,
1408 const struct flow *flow OVS_UNUSED,
1409 odp_port_t out_port)
1411 struct dp_netdev_execute_aux *aux = aux_;
1412 struct dp_netdev_port *p = aux->dp->ports[odp_to_u32(out_port)];
1414 netdev_send(p->netdev, packet);
1419 dp_netdev_action_userspace(void *aux_, struct ofpbuf *packet,
1420 const struct flow *flow OVS_UNUSED,
1421 const struct nlattr *a, bool may_steal)
1423 struct dp_netdev_execute_aux *aux = aux_;
1424 const struct nlattr *userdata;
1426 userdata = nl_attr_find_nested(a, OVS_USERSPACE_ATTR_USERDATA);
1428 /* Make a copy if we are not allowed to steal the packet's data. */
1430 packet = ofpbuf_clone_with_headroom(packet, DP_NETDEV_HEADROOM);
1432 dp_netdev_output_userspace(aux->dp, packet, DPIF_UC_ACTION, aux->key,
1435 ofpbuf_uninit(packet);
1440 dp_netdev_execute_actions(struct dp_netdev *dp, const struct flow *key,
1441 struct ofpbuf *packet,
1442 const struct nlattr *actions, size_t actions_len)
1444 struct dp_netdev_execute_aux aux = {dp, key};
1445 struct flow md = *key; /* Packet metadata, may be modified by actions. */
1447 odp_execute_actions(&aux, packet, &md, actions, actions_len,
1448 dp_netdev_action_output, dp_netdev_action_userspace);
1451 const struct dpif_class dpif_netdev_class = {
1453 dpif_netdev_enumerate,
1454 dpif_netdev_port_open_type,
1457 dpif_netdev_destroy,
1460 dpif_netdev_get_stats,
1461 dpif_netdev_port_add,
1462 dpif_netdev_port_del,
1463 dpif_netdev_port_query_by_number,
1464 dpif_netdev_port_query_by_name,
1465 dpif_netdev_get_max_ports,
1466 NULL, /* port_get_pid */
1467 dpif_netdev_port_dump_start,
1468 dpif_netdev_port_dump_next,
1469 dpif_netdev_port_dump_done,
1470 dpif_netdev_port_poll,
1471 dpif_netdev_port_poll_wait,
1472 dpif_netdev_flow_get,
1473 dpif_netdev_flow_put,
1474 dpif_netdev_flow_del,
1475 dpif_netdev_flow_flush,
1476 dpif_netdev_flow_dump_start,
1477 dpif_netdev_flow_dump_next,
1478 dpif_netdev_flow_dump_done,
1479 dpif_netdev_execute,
1481 dpif_netdev_recv_set,
1482 dpif_netdev_queue_to_priority,
1484 dpif_netdev_recv_wait,
1485 dpif_netdev_recv_purge,
1489 dpif_dummy_change_port_number(struct unixctl_conn *conn, int argc OVS_UNUSED,
1490 const char *argv[], void *aux OVS_UNUSED)
1492 struct dp_netdev_port *port;
1493 struct dp_netdev *dp;
1496 dp = shash_find_data(&dp_netdevs, argv[1]);
1497 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
1498 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
1502 if (get_port_by_name(dp, argv[2], &port)) {
1503 unixctl_command_reply_error(conn, "unknown port");
1507 port_no = atoi(argv[3]);
1508 if (port_no <= 0 || port_no >= MAX_PORTS) {
1509 unixctl_command_reply_error(conn, "bad port number");
1512 if (dp->ports[port_no]) {
1513 unixctl_command_reply_error(conn, "port number already in use");
1516 dp->ports[odp_to_u32(port->port_no)] = NULL;
1517 dp->ports[port_no] = port;
1518 port->port_no = u32_to_odp(port_no);
1519 seq_change(dp->port_seq);
1520 unixctl_command_reply(conn, NULL);
1524 dpif_dummy_register__(const char *type)
1526 struct dpif_class *class;
1528 class = xmalloc(sizeof *class);
1529 *class = dpif_netdev_class;
1530 class->type = xstrdup(type);
1531 dp_register_provider(class);
1535 dpif_dummy_register(bool override)
1542 dp_enumerate_types(&types);
1543 SSET_FOR_EACH (type, &types) {
1544 if (!dp_unregister_provider(type)) {
1545 dpif_dummy_register__(type);
1548 sset_destroy(&types);
1551 dpif_dummy_register__("dummy");
1553 unixctl_command_register("dpif-dummy/change-port-number",
1554 "DP PORT NEW-NUMBER",
1555 3, 3, dpif_dummy_change_port_number, NULL);