2 * Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014 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"
44 #include "meta-flow.h"
46 #include "netdev-vport.h"
48 #include "odp-execute.h"
50 #include "ofp-print.h"
53 #include "poll-loop.h"
63 VLOG_DEFINE_THIS_MODULE(dpif_netdev);
65 /* By default, choose a priority in the middle. */
66 #define NETDEV_RULE_PRIORITY 0x8000
68 /* Configuration parameters. */
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 /* Protects against changes to 'dp_netdevs'. */
82 static struct ovs_mutex dp_netdev_mutex = OVS_MUTEX_INITIALIZER;
84 /* Contains all 'struct dp_netdev's. */
85 static struct shash dp_netdevs OVS_GUARDED_BY(dp_netdev_mutex)
86 = SHASH_INITIALIZER(&dp_netdevs);
88 struct dp_netdev_upcall {
89 struct dpif_upcall upcall; /* Queued upcall information. */
90 struct ofpbuf buf; /* ofpbuf instance for upcall.packet. */
93 /* A queue passing packets from a struct dp_netdev to its clients.
99 * Any access at all requires the owning 'dp_netdev''s queue_mutex. */
100 struct dp_netdev_queue {
101 struct dp_netdev_upcall upcalls[MAX_QUEUE_LEN] OVS_GUARDED;
102 unsigned int head OVS_GUARDED;
103 unsigned int tail OVS_GUARDED;
106 /* Datapath based on the network device interface from netdev.h.
112 * Some members, marked 'const', are immutable. Accessing other members
113 * requires synchronization, as noted in more detail below.
115 * Acquisition order is, from outermost to innermost:
117 * dp_netdev_mutex (global)
124 const struct dpif_class *const class;
125 const char *const name;
126 struct ovs_refcount ref_cnt;
127 atomic_flag destroyed;
131 * Readers of 'cls' and 'flow_table' must take a 'cls->rwlock' read lock.
133 * Writers of 'cls' and 'flow_table' must take the 'flow_mutex' and then
134 * the 'cls->rwlock' write lock. (The outer 'flow_mutex' allows writers to
135 * atomically perform multiple operations on 'cls' and 'flow_table'.)
137 struct ovs_mutex flow_mutex;
138 struct classifier cls; /* Classifier. Protected by cls.rwlock. */
139 struct hmap flow_table OVS_GUARDED; /* Flow table. */
143 * Everything in 'queues' is protected by 'queue_mutex'. */
144 struct ovs_mutex queue_mutex;
145 struct dp_netdev_queue queues[N_QUEUES];
146 struct seq *queue_seq; /* Incremented whenever a packet is queued. */
150 * ovsthread_stats is internally synchronized. */
151 struct ovsthread_stats stats; /* Contains 'struct dp_netdev_stats *'. */
155 * Any lookup into 'ports' or any access to the dp_netdev_ports found
156 * through 'ports' requires taking 'port_rwlock'. */
157 struct ovs_rwlock port_rwlock;
158 struct hmap ports OVS_GUARDED;
159 struct seq *port_seq; /* Incremented whenever a port changes. */
161 /* Forwarding threads. */
162 struct latch exit_latch;
163 struct dp_forwarder *forwarders;
167 static struct dp_netdev_port *dp_netdev_lookup_port(const struct dp_netdev *dp,
169 OVS_REQ_RDLOCK(dp->port_rwlock);
172 DP_STAT_HIT, /* Packets that matched in the flow table. */
173 DP_STAT_MISS, /* Packets that did not match. */
174 DP_STAT_LOST, /* Packets not passed up to the client. */
178 /* Contained by struct dp_netdev's 'stats' member. */
179 struct dp_netdev_stats {
180 struct ovs_mutex mutex; /* Protects 'n'. */
182 /* Indexed by DP_STAT_*, protected by 'mutex'. */
183 unsigned long long int n[DP_N_STATS] OVS_GUARDED;
187 /* A port in a netdev-based datapath. */
188 struct dp_netdev_port {
189 struct hmap_node node; /* Node in dp_netdev's 'ports'. */
191 struct netdev *netdev;
192 struct netdev_saved_flags *sf;
193 struct netdev_rx *rx;
194 char *type; /* Port type as requested by user. */
197 /* A flow in dp_netdev's 'flow_table'.
203 * Except near the beginning or ending of its lifespan, rule 'rule' belongs to
204 * its dp_netdev's classifier. The text below calls this classifier 'cls'.
209 * The thread safety rules described here for "struct dp_netdev_flow" are
210 * motivated by two goals:
212 * - Prevent threads that read members of "struct dp_netdev_flow" from
213 * reading bad data due to changes by some thread concurrently modifying
216 * - Prevent two threads making changes to members of a given "struct
217 * dp_netdev_flow" from interfering with each other.
223 * A flow 'flow' may be accessed without a risk of being freed by code that
224 * holds a read-lock or write-lock on 'cls->rwlock' or that owns a reference to
225 * 'flow->ref_cnt' (or both). Code that needs to hold onto a flow for a while
226 * should take 'cls->rwlock', find the flow it needs, increment 'flow->ref_cnt'
227 * with dpif_netdev_flow_ref(), and drop 'cls->rwlock'.
229 * 'flow->ref_cnt' protects 'flow' from being freed. It doesn't protect the
230 * flow from being deleted from 'cls' (that's 'cls->rwlock') and it doesn't
231 * protect members of 'flow' from modification (that's 'flow->mutex').
233 * 'flow->mutex' protects the members of 'flow' from modification. It doesn't
234 * protect the flow from being deleted from 'cls' (that's 'cls->rwlock') and it
235 * doesn't prevent the flow from being freed (that's 'flow->ref_cnt').
237 * Some members, marked 'const', are immutable. Accessing other members
238 * requires synchronization, as noted in more detail below.
240 struct dp_netdev_flow {
241 /* Packet classification. */
242 const struct cls_rule cr; /* In owning dp_netdev's 'cls'. */
244 /* Hash table index by unmasked flow. */
245 const struct hmap_node node; /* In owning dp_netdev's 'flow_table'. */
246 const struct flow flow; /* The flow that created this entry. */
248 /* Number of references.
249 * The classifier owns one reference.
250 * Any thread trying to keep a rule from being freed should hold its own
252 struct ovs_refcount ref_cnt;
254 /* Protects members marked OVS_GUARDED.
256 * Acquire after datapath's flow_mutex. */
257 struct ovs_mutex mutex OVS_ACQ_AFTER(dp_netdev_mutex);
261 * Reading or writing these members requires 'mutex'. */
262 struct ovsthread_stats stats; /* Contains "struct dp_netdev_flow_stats". */
266 * Reading 'actions' requires 'mutex'.
267 * Writing 'actions' requires 'mutex' and (to allow for transactions) the
268 * datapath's flow_mutex. */
269 struct dp_netdev_actions *actions OVS_GUARDED;
272 static struct dp_netdev_flow *dp_netdev_flow_ref(
273 const struct dp_netdev_flow *);
274 static void dp_netdev_flow_unref(struct dp_netdev_flow *);
276 /* Contained by struct dp_netdev_flow's 'stats' member. */
277 struct dp_netdev_flow_stats {
278 struct ovs_mutex mutex; /* Guards all the other members. */
280 long long int used OVS_GUARDED; /* Last used time, in monotonic msecs. */
281 long long int packet_count OVS_GUARDED; /* Number of packets matched. */
282 long long int byte_count OVS_GUARDED; /* Number of bytes matched. */
283 uint16_t tcp_flags OVS_GUARDED; /* Bitwise-OR of seen tcp_flags values. */
286 /* A set of datapath actions within a "struct dp_netdev_flow".
292 * A struct dp_netdev_actions 'actions' may be accessed without a risk of being
293 * freed by code that holds a read-lock or write-lock on 'flow->mutex' (where
294 * 'flow' is the dp_netdev_flow for which 'flow->actions == actions') or that
295 * owns a reference to 'actions->ref_cnt' (or both). */
296 struct dp_netdev_actions {
297 struct ovs_refcount ref_cnt;
299 /* These members are immutable: they do not change during the struct's
301 struct nlattr *actions; /* Sequence of OVS_ACTION_ATTR_* attributes. */
302 unsigned int size; /* Size of 'actions', in bytes. */
305 struct dp_netdev_actions *dp_netdev_actions_create(const struct nlattr *,
307 struct dp_netdev_actions *dp_netdev_actions_ref(
308 const struct dp_netdev_actions *);
309 void dp_netdev_actions_unref(struct dp_netdev_actions *);
311 /* A thread that receives packets from some ports, looks them up in the flow
312 * table, and executes the actions it finds. */
313 struct dp_forwarder {
314 struct dp_netdev *dp;
317 uint32_t min_hash, max_hash;
320 /* Interface to netdev-based datapath. */
323 struct dp_netdev *dp;
324 uint64_t last_port_seq;
327 static int get_port_by_number(struct dp_netdev *dp, odp_port_t port_no,
328 struct dp_netdev_port **portp)
329 OVS_REQ_RDLOCK(dp->port_rwlock);
330 static int get_port_by_name(struct dp_netdev *dp, const char *devname,
331 struct dp_netdev_port **portp)
332 OVS_REQ_RDLOCK(dp->port_rwlock);
333 static void dp_netdev_free(struct dp_netdev *)
334 OVS_REQUIRES(dp_netdev_mutex);
335 static void dp_netdev_flow_flush(struct dp_netdev *);
336 static int do_add_port(struct dp_netdev *dp, const char *devname,
337 const char *type, odp_port_t port_no)
338 OVS_REQ_WRLOCK(dp->port_rwlock);
339 static int do_del_port(struct dp_netdev *dp, odp_port_t port_no)
340 OVS_REQ_WRLOCK(dp->port_rwlock);
341 static int dpif_netdev_open(const struct dpif_class *, const char *name,
342 bool create, struct dpif **);
343 static int dp_netdev_output_userspace(struct dp_netdev *dp, struct ofpbuf *,
344 int queue_no, const struct flow *,
345 const struct nlattr *userdata)
346 OVS_EXCLUDED(dp->queue_mutex);
347 static void dp_netdev_execute_actions(struct dp_netdev *dp,
348 const struct flow *, struct ofpbuf *,
349 struct pkt_metadata *,
350 const struct nlattr *actions,
352 OVS_REQ_RDLOCK(dp->port_rwlock);
353 static void dp_netdev_port_input(struct dp_netdev *dp, struct ofpbuf *packet,
354 struct pkt_metadata *)
355 OVS_REQ_RDLOCK(dp->port_rwlock);
356 static void dp_netdev_set_threads(struct dp_netdev *, int n);
358 static struct dpif_netdev *
359 dpif_netdev_cast(const struct dpif *dpif)
361 ovs_assert(dpif->dpif_class->open == dpif_netdev_open);
362 return CONTAINER_OF(dpif, struct dpif_netdev, dpif);
365 static struct dp_netdev *
366 get_dp_netdev(const struct dpif *dpif)
368 return dpif_netdev_cast(dpif)->dp;
372 dpif_netdev_enumerate(struct sset *all_dps)
374 struct shash_node *node;
376 ovs_mutex_lock(&dp_netdev_mutex);
377 SHASH_FOR_EACH(node, &dp_netdevs) {
378 sset_add(all_dps, node->name);
380 ovs_mutex_unlock(&dp_netdev_mutex);
386 dpif_netdev_class_is_dummy(const struct dpif_class *class)
388 return class != &dpif_netdev_class;
392 dpif_netdev_port_open_type(const struct dpif_class *class, const char *type)
394 return strcmp(type, "internal") ? type
395 : dpif_netdev_class_is_dummy(class) ? "dummy"
400 create_dpif_netdev(struct dp_netdev *dp)
402 uint16_t netflow_id = hash_string(dp->name, 0);
403 struct dpif_netdev *dpif;
405 ovs_refcount_ref(&dp->ref_cnt);
407 dpif = xmalloc(sizeof *dpif);
408 dpif_init(&dpif->dpif, dp->class, dp->name, netflow_id >> 8, netflow_id);
410 dpif->last_port_seq = seq_read(dp->port_seq);
415 /* Choose an unused, non-zero port number and return it on success.
416 * Return ODPP_NONE on failure. */
418 choose_port(struct dp_netdev *dp, const char *name)
419 OVS_REQ_RDLOCK(dp->port_rwlock)
423 if (dp->class != &dpif_netdev_class) {
427 /* If the port name begins with "br", start the number search at
428 * 100 to make writing tests easier. */
429 if (!strncmp(name, "br", 2)) {
433 /* If the port name contains a number, try to assign that port number.
434 * This can make writing unit tests easier because port numbers are
436 for (p = name; *p != '\0'; p++) {
437 if (isdigit((unsigned char) *p)) {
438 port_no = start_no + strtol(p, NULL, 10);
439 if (port_no > 0 && port_no != odp_to_u32(ODPP_NONE)
440 && !dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
441 return u32_to_odp(port_no);
448 for (port_no = 1; port_no <= UINT16_MAX; port_no++) {
449 if (!dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
450 return u32_to_odp(port_no);
458 create_dp_netdev(const char *name, const struct dpif_class *class,
459 struct dp_netdev **dpp)
460 OVS_REQUIRES(dp_netdev_mutex)
462 struct dp_netdev *dp;
466 dp = xzalloc(sizeof *dp);
467 shash_add(&dp_netdevs, name, dp);
469 *CONST_CAST(const struct dpif_class **, &dp->class) = class;
470 *CONST_CAST(const char **, &dp->name) = xstrdup(name);
471 ovs_refcount_init(&dp->ref_cnt);
472 atomic_flag_clear(&dp->destroyed);
474 ovs_mutex_init(&dp->flow_mutex);
475 classifier_init(&dp->cls, NULL);
476 hmap_init(&dp->flow_table);
478 ovs_mutex_init(&dp->queue_mutex);
479 ovs_mutex_lock(&dp->queue_mutex);
480 for (i = 0; i < N_QUEUES; i++) {
481 dp->queues[i].head = dp->queues[i].tail = 0;
483 ovs_mutex_unlock(&dp->queue_mutex);
484 dp->queue_seq = seq_create();
486 ovsthread_stats_init(&dp->stats);
488 ovs_rwlock_init(&dp->port_rwlock);
489 hmap_init(&dp->ports);
490 dp->port_seq = seq_create();
491 latch_init(&dp->exit_latch);
493 ovs_rwlock_wrlock(&dp->port_rwlock);
494 error = do_add_port(dp, name, "internal", ODPP_LOCAL);
495 ovs_rwlock_unlock(&dp->port_rwlock);
500 dp_netdev_set_threads(dp, 2);
507 dpif_netdev_open(const struct dpif_class *class, const char *name,
508 bool create, struct dpif **dpifp)
510 struct dp_netdev *dp;
513 ovs_mutex_lock(&dp_netdev_mutex);
514 dp = shash_find_data(&dp_netdevs, name);
516 error = create ? create_dp_netdev(name, class, &dp) : ENODEV;
518 error = (dp->class != class ? EINVAL
523 *dpifp = create_dpif_netdev(dp);
525 ovs_mutex_unlock(&dp_netdev_mutex);
531 dp_netdev_purge_queues(struct dp_netdev *dp)
535 ovs_mutex_lock(&dp->queue_mutex);
536 for (i = 0; i < N_QUEUES; i++) {
537 struct dp_netdev_queue *q = &dp->queues[i];
539 while (q->tail != q->head) {
540 struct dp_netdev_upcall *u = &q->upcalls[q->tail++ & QUEUE_MASK];
541 ofpbuf_uninit(&u->upcall.packet);
542 ofpbuf_uninit(&u->buf);
545 ovs_mutex_unlock(&dp->queue_mutex);
548 /* Requires dp_netdev_mutex so that we can't get a new reference to 'dp'
549 * through the 'dp_netdevs' shash while freeing 'dp'. */
551 dp_netdev_free(struct dp_netdev *dp)
552 OVS_REQUIRES(dp_netdev_mutex)
554 struct dp_netdev_port *port, *next;
555 struct dp_netdev_stats *bucket;
558 shash_find_and_delete(&dp_netdevs, dp->name);
560 dp_netdev_set_threads(dp, 0);
561 free(dp->forwarders);
563 dp_netdev_flow_flush(dp);
564 ovs_rwlock_wrlock(&dp->port_rwlock);
565 HMAP_FOR_EACH_SAFE (port, next, node, &dp->ports) {
566 do_del_port(dp, port->port_no);
568 ovs_rwlock_unlock(&dp->port_rwlock);
570 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
571 ovs_mutex_destroy(&bucket->mutex);
572 free_cacheline(bucket);
574 ovsthread_stats_destroy(&dp->stats);
576 dp_netdev_purge_queues(dp);
577 seq_destroy(dp->queue_seq);
578 ovs_mutex_destroy(&dp->queue_mutex);
580 classifier_destroy(&dp->cls);
581 hmap_destroy(&dp->flow_table);
582 ovs_mutex_destroy(&dp->flow_mutex);
583 seq_destroy(dp->port_seq);
584 hmap_destroy(&dp->ports);
585 latch_destroy(&dp->exit_latch);
586 free(CONST_CAST(char *, dp->name));
591 dp_netdev_unref(struct dp_netdev *dp)
594 /* Take dp_netdev_mutex so that, if dp->ref_cnt falls to zero, we can't
595 * get a new reference to 'dp' through the 'dp_netdevs' shash. */
596 ovs_mutex_lock(&dp_netdev_mutex);
597 if (ovs_refcount_unref(&dp->ref_cnt) == 1) {
600 ovs_mutex_unlock(&dp_netdev_mutex);
605 dpif_netdev_close(struct dpif *dpif)
607 struct dp_netdev *dp = get_dp_netdev(dpif);
614 dpif_netdev_destroy(struct dpif *dpif)
616 struct dp_netdev *dp = get_dp_netdev(dpif);
618 if (!atomic_flag_test_and_set(&dp->destroyed)) {
619 if (ovs_refcount_unref(&dp->ref_cnt) == 1) {
620 /* Can't happen: 'dpif' still owns a reference to 'dp'. */
629 dpif_netdev_get_stats(const struct dpif *dpif, struct dpif_dp_stats *stats)
631 struct dp_netdev *dp = get_dp_netdev(dpif);
632 struct dp_netdev_stats *bucket;
635 fat_rwlock_rdlock(&dp->cls.rwlock);
636 stats->n_flows = hmap_count(&dp->flow_table);
637 fat_rwlock_unlock(&dp->cls.rwlock);
639 stats->n_hit = stats->n_missed = stats->n_lost = 0;
640 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
641 ovs_mutex_lock(&bucket->mutex);
642 stats->n_hit += bucket->n[DP_STAT_HIT];
643 stats->n_missed += bucket->n[DP_STAT_MISS];
644 stats->n_lost += bucket->n[DP_STAT_LOST];
645 ovs_mutex_unlock(&bucket->mutex);
647 stats->n_masks = UINT32_MAX;
648 stats->n_mask_hit = UINT64_MAX;
654 do_add_port(struct dp_netdev *dp, const char *devname, const char *type,
656 OVS_REQ_WRLOCK(dp->port_rwlock)
658 struct netdev_saved_flags *sf;
659 struct dp_netdev_port *port;
660 struct netdev *netdev;
661 struct netdev_rx *rx;
662 enum netdev_flags flags;
663 const char *open_type;
666 /* XXX reject devices already in some dp_netdev. */
668 /* Open and validate network device. */
669 open_type = dpif_netdev_port_open_type(dp->class, type);
670 error = netdev_open(devname, open_type, &netdev);
674 /* XXX reject non-Ethernet devices */
676 netdev_get_flags(netdev, &flags);
677 if (flags & NETDEV_LOOPBACK) {
678 VLOG_ERR("%s: cannot add a loopback device", devname);
679 netdev_close(netdev);
683 error = netdev_rx_open(netdev, &rx);
685 && !(error == EOPNOTSUPP && dpif_netdev_class_is_dummy(dp->class))) {
686 VLOG_ERR("%s: cannot receive packets on this network device (%s)",
687 devname, ovs_strerror(errno));
688 netdev_close(netdev);
692 error = netdev_turn_flags_on(netdev, NETDEV_PROMISC, &sf);
695 netdev_close(netdev);
699 port = xmalloc(sizeof *port);
700 port->port_no = port_no;
701 port->netdev = netdev;
704 port->type = xstrdup(type);
706 hmap_insert(&dp->ports, &port->node, hash_int(odp_to_u32(port_no), 0));
707 seq_change(dp->port_seq);
713 dpif_netdev_port_add(struct dpif *dpif, struct netdev *netdev,
714 odp_port_t *port_nop)
716 struct dp_netdev *dp = get_dp_netdev(dpif);
717 char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
718 const char *dpif_port;
722 ovs_rwlock_wrlock(&dp->port_rwlock);
723 dpif_port = netdev_vport_get_dpif_port(netdev, namebuf, sizeof namebuf);
724 if (*port_nop != ODPP_NONE) {
726 error = dp_netdev_lookup_port(dp, *port_nop) ? EBUSY : 0;
728 port_no = choose_port(dp, dpif_port);
729 error = port_no == ODPP_NONE ? EFBIG : 0;
733 error = do_add_port(dp, dpif_port, netdev_get_type(netdev), port_no);
735 ovs_rwlock_unlock(&dp->port_rwlock);
741 dpif_netdev_port_del(struct dpif *dpif, odp_port_t port_no)
743 struct dp_netdev *dp = get_dp_netdev(dpif);
746 ovs_rwlock_wrlock(&dp->port_rwlock);
747 error = port_no == ODPP_LOCAL ? EINVAL : do_del_port(dp, port_no);
748 ovs_rwlock_unlock(&dp->port_rwlock);
754 is_valid_port_number(odp_port_t port_no)
756 return port_no != ODPP_NONE;
759 static struct dp_netdev_port *
760 dp_netdev_lookup_port(const struct dp_netdev *dp, odp_port_t port_no)
761 OVS_REQ_RDLOCK(dp->port_rwlock)
763 struct dp_netdev_port *port;
765 HMAP_FOR_EACH_IN_BUCKET (port, node, hash_int(odp_to_u32(port_no), 0),
767 if (port->port_no == port_no) {
775 get_port_by_number(struct dp_netdev *dp,
776 odp_port_t port_no, struct dp_netdev_port **portp)
777 OVS_REQ_RDLOCK(dp->port_rwlock)
779 if (!is_valid_port_number(port_no)) {
783 *portp = dp_netdev_lookup_port(dp, port_no);
784 return *portp ? 0 : ENOENT;
789 get_port_by_name(struct dp_netdev *dp,
790 const char *devname, struct dp_netdev_port **portp)
791 OVS_REQ_RDLOCK(dp->port_rwlock)
793 struct dp_netdev_port *port;
795 HMAP_FOR_EACH (port, node, &dp->ports) {
796 if (!strcmp(netdev_get_name(port->netdev), devname)) {
805 do_del_port(struct dp_netdev *dp, odp_port_t port_no)
806 OVS_REQ_WRLOCK(dp->port_rwlock)
808 struct dp_netdev_port *port;
811 error = get_port_by_number(dp, port_no, &port);
816 hmap_remove(&dp->ports, &port->node);
817 seq_change(dp->port_seq);
819 netdev_close(port->netdev);
820 netdev_restore_flags(port->sf);
821 netdev_rx_close(port->rx);
829 answer_port_query(const struct dp_netdev_port *port,
830 struct dpif_port *dpif_port)
832 dpif_port->name = xstrdup(netdev_get_name(port->netdev));
833 dpif_port->type = xstrdup(port->type);
834 dpif_port->port_no = port->port_no;
838 dpif_netdev_port_query_by_number(const struct dpif *dpif, odp_port_t port_no,
839 struct dpif_port *dpif_port)
841 struct dp_netdev *dp = get_dp_netdev(dpif);
842 struct dp_netdev_port *port;
845 ovs_rwlock_rdlock(&dp->port_rwlock);
846 error = get_port_by_number(dp, port_no, &port);
847 if (!error && dpif_port) {
848 answer_port_query(port, dpif_port);
850 ovs_rwlock_unlock(&dp->port_rwlock);
856 dpif_netdev_port_query_by_name(const struct dpif *dpif, const char *devname,
857 struct dpif_port *dpif_port)
859 struct dp_netdev *dp = get_dp_netdev(dpif);
860 struct dp_netdev_port *port;
863 ovs_rwlock_rdlock(&dp->port_rwlock);
864 error = get_port_by_name(dp, devname, &port);
865 if (!error && dpif_port) {
866 answer_port_query(port, dpif_port);
868 ovs_rwlock_unlock(&dp->port_rwlock);
874 dp_netdev_remove_flow(struct dp_netdev *dp, struct dp_netdev_flow *flow)
875 OVS_REQ_WRLOCK(dp->cls.rwlock)
876 OVS_REQUIRES(dp->flow_mutex)
878 struct cls_rule *cr = CONST_CAST(struct cls_rule *, &flow->cr);
879 struct hmap_node *node = CONST_CAST(struct hmap_node *, &flow->node);
881 classifier_remove(&dp->cls, cr);
882 hmap_remove(&dp->flow_table, node);
883 dp_netdev_flow_unref(flow);
886 static struct dp_netdev_flow *
887 dp_netdev_flow_ref(const struct dp_netdev_flow *flow_)
889 struct dp_netdev_flow *flow = CONST_CAST(struct dp_netdev_flow *, flow_);
891 ovs_refcount_ref(&flow->ref_cnt);
897 dp_netdev_flow_unref(struct dp_netdev_flow *flow)
899 if (flow && ovs_refcount_unref(&flow->ref_cnt) == 1) {
900 struct dp_netdev_flow_stats *bucket;
903 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &flow->stats) {
904 ovs_mutex_destroy(&bucket->mutex);
905 free_cacheline(bucket);
907 ovsthread_stats_destroy(&flow->stats);
909 cls_rule_destroy(CONST_CAST(struct cls_rule *, &flow->cr));
910 ovs_mutex_lock(&flow->mutex);
911 dp_netdev_actions_unref(flow->actions);
912 ovs_mutex_unlock(&flow->mutex);
913 ovs_mutex_destroy(&flow->mutex);
919 dp_netdev_flow_flush(struct dp_netdev *dp)
921 struct dp_netdev_flow *netdev_flow, *next;
923 ovs_mutex_lock(&dp->flow_mutex);
924 fat_rwlock_wrlock(&dp->cls.rwlock);
925 HMAP_FOR_EACH_SAFE (netdev_flow, next, node, &dp->flow_table) {
926 dp_netdev_remove_flow(dp, netdev_flow);
928 fat_rwlock_unlock(&dp->cls.rwlock);
929 ovs_mutex_unlock(&dp->flow_mutex);
933 dpif_netdev_flow_flush(struct dpif *dpif)
935 struct dp_netdev *dp = get_dp_netdev(dpif);
937 dp_netdev_flow_flush(dp);
941 struct dp_netdev_port_state {
948 dpif_netdev_port_dump_start(const struct dpif *dpif OVS_UNUSED, void **statep)
950 *statep = xzalloc(sizeof(struct dp_netdev_port_state));
955 dpif_netdev_port_dump_next(const struct dpif *dpif, void *state_,
956 struct dpif_port *dpif_port)
958 struct dp_netdev_port_state *state = state_;
959 struct dp_netdev *dp = get_dp_netdev(dpif);
960 struct hmap_node *node;
963 ovs_rwlock_rdlock(&dp->port_rwlock);
964 node = hmap_at_position(&dp->ports, &state->bucket, &state->offset);
966 struct dp_netdev_port *port;
968 port = CONTAINER_OF(node, struct dp_netdev_port, node);
971 state->name = xstrdup(netdev_get_name(port->netdev));
972 dpif_port->name = state->name;
973 dpif_port->type = port->type;
974 dpif_port->port_no = port->port_no;
980 ovs_rwlock_unlock(&dp->port_rwlock);
986 dpif_netdev_port_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
988 struct dp_netdev_port_state *state = state_;
995 dpif_netdev_port_poll(const struct dpif *dpif_, char **devnamep OVS_UNUSED)
997 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
998 uint64_t new_port_seq;
1001 new_port_seq = seq_read(dpif->dp->port_seq);
1002 if (dpif->last_port_seq != new_port_seq) {
1003 dpif->last_port_seq = new_port_seq;
1013 dpif_netdev_port_poll_wait(const struct dpif *dpif_)
1015 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
1017 seq_wait(dpif->dp->port_seq, dpif->last_port_seq);
1020 static struct dp_netdev_flow *
1021 dp_netdev_flow_cast(const struct cls_rule *cr)
1023 return cr ? CONTAINER_OF(cr, struct dp_netdev_flow, cr) : NULL;
1026 static struct dp_netdev_flow *
1027 dp_netdev_lookup_flow(const struct dp_netdev *dp, const struct flow *flow)
1028 OVS_EXCLUDED(dp->cls.rwlock)
1030 struct dp_netdev_flow *netdev_flow;
1032 fat_rwlock_rdlock(&dp->cls.rwlock);
1033 netdev_flow = dp_netdev_flow_cast(classifier_lookup(&dp->cls, flow, NULL));
1034 dp_netdev_flow_ref(netdev_flow);
1035 fat_rwlock_unlock(&dp->cls.rwlock);
1040 static struct dp_netdev_flow *
1041 dp_netdev_find_flow(const struct dp_netdev *dp, const struct flow *flow)
1042 OVS_REQ_RDLOCK(dp->cls.rwlock)
1044 struct dp_netdev_flow *netdev_flow;
1046 HMAP_FOR_EACH_WITH_HASH (netdev_flow, node, flow_hash(flow, 0),
1048 if (flow_equal(&netdev_flow->flow, flow)) {
1049 return dp_netdev_flow_ref(netdev_flow);
1057 get_dpif_flow_stats(struct dp_netdev_flow *netdev_flow,
1058 struct dpif_flow_stats *stats)
1060 struct dp_netdev_flow_stats *bucket;
1063 memset(stats, 0, sizeof *stats);
1064 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
1065 ovs_mutex_lock(&bucket->mutex);
1066 stats->n_packets += bucket->packet_count;
1067 stats->n_bytes += bucket->byte_count;
1068 stats->used = MAX(stats->used, bucket->used);
1069 stats->tcp_flags |= bucket->tcp_flags;
1070 ovs_mutex_unlock(&bucket->mutex);
1075 dpif_netdev_mask_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1076 const struct nlattr *mask_key,
1077 uint32_t mask_key_len, const struct flow *flow,
1081 enum odp_key_fitness fitness;
1083 fitness = odp_flow_key_to_mask(mask_key, mask_key_len, mask, flow);
1085 /* This should not happen: it indicates that
1086 * odp_flow_key_from_mask() and odp_flow_key_to_mask()
1087 * disagree on the acceptable form of a mask. Log the problem
1088 * as an error, with enough details to enable debugging. */
1089 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1091 if (!VLOG_DROP_ERR(&rl)) {
1095 odp_flow_format(key, key_len, mask_key, mask_key_len, NULL, &s,
1097 VLOG_ERR("internal error parsing flow mask %s (%s)",
1098 ds_cstr(&s), odp_key_fitness_to_string(fitness));
1104 /* Force unwildcard the in_port. */
1105 mask->in_port.odp_port = u32_to_odp(UINT32_MAX);
1107 enum mf_field_id id;
1108 /* No mask key, unwildcard everything except fields whose
1109 * prerequisities are not met. */
1110 memset(mask, 0x0, sizeof *mask);
1112 for (id = 0; id < MFF_N_IDS; ++id) {
1113 /* Skip registers and metadata. */
1114 if (!(id >= MFF_REG0 && id < MFF_REG0 + FLOW_N_REGS)
1115 && id != MFF_METADATA) {
1116 const struct mf_field *mf = mf_from_id(id);
1117 if (mf_are_prereqs_ok(mf, flow)) {
1118 mf_mask_field(mf, mask);
1128 dpif_netdev_flow_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1133 if (odp_flow_key_to_flow(key, key_len, flow)) {
1134 /* This should not happen: it indicates that odp_flow_key_from_flow()
1135 * and odp_flow_key_to_flow() disagree on the acceptable form of a
1136 * flow. Log the problem as an error, with enough details to enable
1138 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1140 if (!VLOG_DROP_ERR(&rl)) {
1144 odp_flow_format(key, key_len, NULL, 0, NULL, &s, true);
1145 VLOG_ERR("internal error parsing flow key %s", ds_cstr(&s));
1152 in_port = flow->in_port.odp_port;
1153 if (!is_valid_port_number(in_port) && in_port != ODPP_NONE) {
1161 dpif_netdev_flow_get(const struct dpif *dpif,
1162 const struct nlattr *nl_key, size_t nl_key_len,
1163 struct ofpbuf **actionsp, struct dpif_flow_stats *stats)
1165 struct dp_netdev *dp = get_dp_netdev(dpif);
1166 struct dp_netdev_flow *netdev_flow;
1170 error = dpif_netdev_flow_from_nlattrs(nl_key, nl_key_len, &key);
1175 fat_rwlock_rdlock(&dp->cls.rwlock);
1176 netdev_flow = dp_netdev_find_flow(dp, &key);
1177 fat_rwlock_unlock(&dp->cls.rwlock);
1180 struct dp_netdev_actions *actions = NULL;
1183 get_dpif_flow_stats(netdev_flow, stats);
1186 ovs_mutex_lock(&netdev_flow->mutex);
1188 actions = dp_netdev_actions_ref(netdev_flow->actions);
1190 ovs_mutex_unlock(&netdev_flow->mutex);
1192 dp_netdev_flow_unref(netdev_flow);
1195 *actionsp = ofpbuf_clone_data(actions->actions, actions->size);
1196 dp_netdev_actions_unref(actions);
1206 dp_netdev_flow_add(struct dp_netdev *dp, const struct flow *flow,
1207 const struct flow_wildcards *wc,
1208 const struct nlattr *actions,
1210 OVS_REQUIRES(dp->flow_mutex)
1212 struct dp_netdev_flow *netdev_flow;
1215 netdev_flow = xzalloc(sizeof *netdev_flow);
1216 *CONST_CAST(struct flow *, &netdev_flow->flow) = *flow;
1217 ovs_refcount_init(&netdev_flow->ref_cnt);
1219 ovs_mutex_init(&netdev_flow->mutex);
1220 ovs_mutex_lock(&netdev_flow->mutex);
1222 ovsthread_stats_init(&netdev_flow->stats);
1224 netdev_flow->actions = dp_netdev_actions_create(actions, actions_len);
1226 match_init(&match, flow, wc);
1227 cls_rule_init(CONST_CAST(struct cls_rule *, &netdev_flow->cr),
1228 &match, NETDEV_RULE_PRIORITY);
1229 fat_rwlock_wrlock(&dp->cls.rwlock);
1230 classifier_insert(&dp->cls,
1231 CONST_CAST(struct cls_rule *, &netdev_flow->cr));
1232 hmap_insert(&dp->flow_table,
1233 CONST_CAST(struct hmap_node *, &netdev_flow->node),
1234 flow_hash(flow, 0));
1235 fat_rwlock_unlock(&dp->cls.rwlock);
1237 ovs_mutex_unlock(&netdev_flow->mutex);
1243 clear_stats(struct dp_netdev_flow *netdev_flow)
1245 struct dp_netdev_flow_stats *bucket;
1248 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
1249 ovs_mutex_lock(&bucket->mutex);
1251 bucket->packet_count = 0;
1252 bucket->byte_count = 0;
1253 bucket->tcp_flags = 0;
1254 ovs_mutex_unlock(&bucket->mutex);
1259 dpif_netdev_flow_put(struct dpif *dpif, const struct dpif_flow_put *put)
1261 struct dp_netdev *dp = get_dp_netdev(dpif);
1262 struct dp_netdev_flow *netdev_flow;
1264 struct flow_wildcards wc;
1267 error = dpif_netdev_flow_from_nlattrs(put->key, put->key_len, &flow);
1271 error = dpif_netdev_mask_from_nlattrs(put->key, put->key_len,
1272 put->mask, put->mask_len,
1278 ovs_mutex_lock(&dp->flow_mutex);
1279 netdev_flow = dp_netdev_lookup_flow(dp, &flow);
1281 if (put->flags & DPIF_FP_CREATE) {
1282 if (hmap_count(&dp->flow_table) < MAX_FLOWS) {
1284 memset(put->stats, 0, sizeof *put->stats);
1286 error = dp_netdev_flow_add(dp, &flow, &wc, put->actions,
1295 if (put->flags & DPIF_FP_MODIFY
1296 && flow_equal(&flow, &netdev_flow->flow)) {
1297 struct dp_netdev_actions *new_actions;
1298 struct dp_netdev_actions *old_actions;
1300 new_actions = dp_netdev_actions_create(put->actions,
1303 ovs_mutex_lock(&netdev_flow->mutex);
1304 old_actions = netdev_flow->actions;
1305 netdev_flow->actions = new_actions;
1306 ovs_mutex_unlock(&netdev_flow->mutex);
1309 get_dpif_flow_stats(netdev_flow, put->stats);
1311 if (put->flags & DPIF_FP_ZERO_STATS) {
1312 clear_stats(netdev_flow);
1315 dp_netdev_actions_unref(old_actions);
1316 } else if (put->flags & DPIF_FP_CREATE) {
1319 /* Overlapping flow. */
1322 dp_netdev_flow_unref(netdev_flow);
1324 ovs_mutex_unlock(&dp->flow_mutex);
1330 dpif_netdev_flow_del(struct dpif *dpif, const struct dpif_flow_del *del)
1332 struct dp_netdev *dp = get_dp_netdev(dpif);
1333 struct dp_netdev_flow *netdev_flow;
1337 error = dpif_netdev_flow_from_nlattrs(del->key, del->key_len, &key);
1342 ovs_mutex_lock(&dp->flow_mutex);
1343 fat_rwlock_wrlock(&dp->cls.rwlock);
1344 netdev_flow = dp_netdev_find_flow(dp, &key);
1347 get_dpif_flow_stats(netdev_flow, del->stats);
1349 dp_netdev_remove_flow(dp, netdev_flow);
1350 dp_netdev_flow_unref(netdev_flow);
1354 fat_rwlock_unlock(&dp->cls.rwlock);
1355 ovs_mutex_unlock(&dp->flow_mutex);
1360 struct dp_netdev_flow_state {
1361 struct dp_netdev_actions *actions;
1362 struct odputil_keybuf keybuf;
1363 struct odputil_keybuf maskbuf;
1364 struct dpif_flow_stats stats;
1367 struct dp_netdev_flow_iter {
1371 struct ovs_mutex mutex;
1375 dpif_netdev_flow_dump_state_init(void **statep)
1377 struct dp_netdev_flow_state *state;
1379 *statep = state = xmalloc(sizeof *state);
1380 state->actions = NULL;
1384 dpif_netdev_flow_dump_state_uninit(void *state_)
1386 struct dp_netdev_flow_state *state = state_;
1388 dp_netdev_actions_unref(state->actions);
1393 dpif_netdev_flow_dump_start(const struct dpif *dpif OVS_UNUSED, void **iterp)
1395 struct dp_netdev_flow_iter *iter;
1397 *iterp = iter = xmalloc(sizeof *iter);
1401 ovs_mutex_init(&iter->mutex);
1406 dpif_netdev_flow_dump_next(const struct dpif *dpif, void *iter_, void *state_,
1407 const struct nlattr **key, size_t *key_len,
1408 const struct nlattr **mask, size_t *mask_len,
1409 const struct nlattr **actions, size_t *actions_len,
1410 const struct dpif_flow_stats **stats)
1412 struct dp_netdev_flow_iter *iter = iter_;
1413 struct dp_netdev_flow_state *state = state_;
1414 struct dp_netdev *dp = get_dp_netdev(dpif);
1415 struct dp_netdev_flow *netdev_flow;
1418 ovs_mutex_lock(&iter->mutex);
1419 error = iter->status;
1421 struct hmap_node *node;
1423 fat_rwlock_rdlock(&dp->cls.rwlock);
1424 node = hmap_at_position(&dp->flow_table, &iter->bucket, &iter->offset);
1426 netdev_flow = CONTAINER_OF(node, struct dp_netdev_flow, node);
1427 dp_netdev_flow_ref(netdev_flow);
1429 fat_rwlock_unlock(&dp->cls.rwlock);
1431 iter->status = error = EOF;
1434 ovs_mutex_unlock(&iter->mutex);
1442 ofpbuf_use_stack(&buf, &state->keybuf, sizeof state->keybuf);
1443 odp_flow_key_from_flow(&buf, &netdev_flow->flow,
1444 netdev_flow->flow.in_port.odp_port);
1447 *key_len = buf.size;
1452 struct flow_wildcards wc;
1454 ofpbuf_use_stack(&buf, &state->maskbuf, sizeof state->maskbuf);
1455 minimask_expand(&netdev_flow->cr.match.mask, &wc);
1456 odp_flow_key_from_mask(&buf, &wc.masks, &netdev_flow->flow,
1457 odp_to_u32(wc.masks.in_port.odp_port),
1461 *mask_len = buf.size;
1464 if (actions || stats) {
1465 dp_netdev_actions_unref(state->actions);
1466 state->actions = NULL;
1468 ovs_mutex_lock(&netdev_flow->mutex);
1470 state->actions = dp_netdev_actions_ref(netdev_flow->actions);
1471 *actions = state->actions->actions;
1472 *actions_len = state->actions->size;
1474 ovs_mutex_unlock(&netdev_flow->mutex);
1477 get_dpif_flow_stats(netdev_flow, &state->stats);
1478 *stats = &state->stats;
1482 dp_netdev_flow_unref(netdev_flow);
1488 dpif_netdev_flow_dump_done(const struct dpif *dpif OVS_UNUSED, void *iter_)
1490 struct dp_netdev_flow_iter *iter = iter_;
1492 ovs_mutex_destroy(&iter->mutex);
1498 dpif_netdev_execute(struct dpif *dpif, struct dpif_execute *execute)
1500 struct dp_netdev *dp = get_dp_netdev(dpif);
1501 struct pkt_metadata *md = &execute->md;
1504 if (execute->packet->size < ETH_HEADER_LEN ||
1505 execute->packet->size > UINT16_MAX) {
1509 /* Extract flow key. */
1510 flow_extract(execute->packet, md, &key);
1512 ovs_rwlock_rdlock(&dp->port_rwlock);
1513 dp_netdev_execute_actions(dp, &key, execute->packet, md, execute->actions,
1514 execute->actions_len);
1515 ovs_rwlock_unlock(&dp->port_rwlock);
1521 dpif_netdev_recv_set(struct dpif *dpif OVS_UNUSED, bool enable OVS_UNUSED)
1527 dpif_netdev_queue_to_priority(const struct dpif *dpif OVS_UNUSED,
1528 uint32_t queue_id, uint32_t *priority)
1530 *priority = queue_id;
1534 static struct dp_netdev_queue *
1535 find_nonempty_queue(struct dp_netdev *dp)
1536 OVS_REQUIRES(dp->queue_mutex)
1540 for (i = 0; i < N_QUEUES; i++) {
1541 struct dp_netdev_queue *q = &dp->queues[i];
1542 if (q->head != q->tail) {
1550 dpif_netdev_recv(struct dpif *dpif, struct dpif_upcall *upcall,
1553 struct dp_netdev *dp = get_dp_netdev(dpif);
1554 struct dp_netdev_queue *q;
1557 ovs_mutex_lock(&dp->queue_mutex);
1558 q = find_nonempty_queue(dp);
1560 struct dp_netdev_upcall *u = &q->upcalls[q->tail++ & QUEUE_MASK];
1562 *upcall = u->upcall;
1571 ovs_mutex_unlock(&dp->queue_mutex);
1577 dpif_netdev_recv_wait(struct dpif *dpif)
1579 struct dp_netdev *dp = get_dp_netdev(dpif);
1582 ovs_mutex_lock(&dp->queue_mutex);
1583 seq = seq_read(dp->queue_seq);
1584 if (find_nonempty_queue(dp)) {
1585 poll_immediate_wake();
1587 seq_wait(dp->queue_seq, seq);
1589 ovs_mutex_unlock(&dp->queue_mutex);
1593 dpif_netdev_recv_purge(struct dpif *dpif)
1595 struct dpif_netdev *dpif_netdev = dpif_netdev_cast(dpif);
1597 dp_netdev_purge_queues(dpif_netdev->dp);
1600 /* Creates and returns a new 'struct dp_netdev_actions', with a reference count
1601 * of 1, whose actions are a copy of from the 'ofpacts_len' bytes of
1603 struct dp_netdev_actions *
1604 dp_netdev_actions_create(const struct nlattr *actions, size_t size)
1606 struct dp_netdev_actions *netdev_actions;
1608 netdev_actions = xmalloc(sizeof *netdev_actions);
1609 ovs_refcount_init(&netdev_actions->ref_cnt);
1610 netdev_actions->actions = xmemdup(actions, size);
1611 netdev_actions->size = size;
1613 return netdev_actions;
1616 /* Increments 'actions''s refcount. */
1617 struct dp_netdev_actions *
1618 dp_netdev_actions_ref(const struct dp_netdev_actions *actions_)
1620 struct dp_netdev_actions *actions;
1622 actions = CONST_CAST(struct dp_netdev_actions *, actions_);
1624 ovs_refcount_ref(&actions->ref_cnt);
1629 /* Decrements 'actions''s refcount and frees 'actions' if the refcount reaches
1632 dp_netdev_actions_unref(struct dp_netdev_actions *actions)
1634 if (actions && ovs_refcount_unref(&actions->ref_cnt) == 1) {
1635 free(actions->actions);
1641 dp_forwarder_main(void *f_)
1643 struct dp_forwarder *f = f_;
1644 struct dp_netdev *dp = f->dp;
1645 struct ofpbuf packet;
1647 f->name = xasprintf("forwarder_%u", ovsthread_id_self());
1648 set_subprogram_name("%s", f->name);
1650 ofpbuf_init(&packet, 0);
1651 while (!latch_is_set(&dp->exit_latch)) {
1652 bool received_anything;
1655 ovs_rwlock_rdlock(&dp->port_rwlock);
1656 for (i = 0; i < 50; i++) {
1657 struct dp_netdev_port *port;
1659 received_anything = false;
1660 HMAP_FOR_EACH (port, node, &f->dp->ports) {
1662 && port->node.hash >= f->min_hash
1663 && port->node.hash <= f->max_hash) {
1668 if (netdev_get_mtu(port->netdev, &mtu)) {
1669 mtu = ETH_PAYLOAD_MAX;
1671 buf_size = DP_NETDEV_HEADROOM + VLAN_ETH_HEADER_LEN + mtu;
1673 ofpbuf_clear(&packet);
1674 ofpbuf_reserve_with_tailroom(&packet, DP_NETDEV_HEADROOM,
1677 error = netdev_rx_recv(port->rx, &packet);
1679 struct pkt_metadata md
1680 = PKT_METADATA_INITIALIZER(port->port_no);
1682 dp_netdev_port_input(dp, &packet, &md);
1683 received_anything = true;
1684 } else if (error != EAGAIN && error != EOPNOTSUPP) {
1685 static struct vlog_rate_limit rl
1686 = VLOG_RATE_LIMIT_INIT(1, 5);
1688 VLOG_ERR_RL(&rl, "error receiving data from %s: %s",
1689 netdev_get_name(port->netdev),
1690 ovs_strerror(error));
1695 if (!received_anything) {
1700 if (received_anything) {
1701 poll_immediate_wake();
1703 struct dp_netdev_port *port;
1705 HMAP_FOR_EACH (port, node, &f->dp->ports)
1707 && port->node.hash >= f->min_hash
1708 && port->node.hash <= f->max_hash) {
1709 netdev_rx_wait(port->rx);
1711 seq_wait(dp->port_seq, seq_read(dp->port_seq));
1712 latch_wait(&dp->exit_latch);
1714 ovs_rwlock_unlock(&dp->port_rwlock);
1718 ofpbuf_uninit(&packet);
1726 dp_netdev_set_threads(struct dp_netdev *dp, int n)
1730 if (n == dp->n_forwarders) {
1734 /* Stop existing threads. */
1735 latch_set(&dp->exit_latch);
1736 for (i = 0; i < dp->n_forwarders; i++) {
1737 struct dp_forwarder *f = &dp->forwarders[i];
1739 xpthread_join(f->thread, NULL);
1741 latch_poll(&dp->exit_latch);
1742 free(dp->forwarders);
1744 /* Start new threads. */
1745 dp->forwarders = xmalloc(n * sizeof *dp->forwarders);
1746 dp->n_forwarders = n;
1747 for (i = 0; i < n; i++) {
1748 struct dp_forwarder *f = &dp->forwarders[i];
1751 f->min_hash = UINT32_MAX / n * i;
1752 f->max_hash = UINT32_MAX / n * (i + 1) - 1;
1754 f->max_hash = UINT32_MAX;
1756 xpthread_create(&f->thread, NULL, dp_forwarder_main, f);
1761 dp_netdev_flow_stats_new_cb(void)
1763 struct dp_netdev_flow_stats *bucket = xzalloc_cacheline(sizeof *bucket);
1764 ovs_mutex_init(&bucket->mutex);
1769 dp_netdev_flow_used(struct dp_netdev_flow *netdev_flow,
1770 const struct ofpbuf *packet)
1772 uint16_t tcp_flags = packet_get_tcp_flags(packet, &netdev_flow->flow);
1773 long long int now = time_msec();
1774 struct dp_netdev_flow_stats *bucket;
1776 bucket = ovsthread_stats_bucket_get(&netdev_flow->stats,
1777 dp_netdev_flow_stats_new_cb);
1779 ovs_mutex_lock(&bucket->mutex);
1780 bucket->used = MAX(now, bucket->used);
1781 bucket->packet_count++;
1782 bucket->byte_count += packet->size;
1783 bucket->tcp_flags |= tcp_flags;
1784 ovs_mutex_unlock(&bucket->mutex);
1788 dp_netdev_stats_new_cb(void)
1790 struct dp_netdev_stats *bucket = xzalloc_cacheline(sizeof *bucket);
1791 ovs_mutex_init(&bucket->mutex);
1796 dp_netdev_count_packet(struct dp_netdev *dp, enum dp_stat_type type)
1798 struct dp_netdev_stats *bucket;
1800 bucket = ovsthread_stats_bucket_get(&dp->stats, dp_netdev_stats_new_cb);
1801 ovs_mutex_lock(&bucket->mutex);
1803 ovs_mutex_unlock(&bucket->mutex);
1807 dp_netdev_port_input(struct dp_netdev *dp, struct ofpbuf *packet,
1808 struct pkt_metadata *md)
1809 OVS_REQ_RDLOCK(dp->port_rwlock)
1811 struct dp_netdev_flow *netdev_flow;
1814 if (packet->size < ETH_HEADER_LEN) {
1817 flow_extract(packet, md, &key);
1818 netdev_flow = dp_netdev_lookup_flow(dp, &key);
1820 struct dp_netdev_actions *actions;
1822 dp_netdev_flow_used(netdev_flow, packet);
1824 ovs_mutex_lock(&netdev_flow->mutex);
1825 actions = dp_netdev_actions_ref(netdev_flow->actions);
1826 ovs_mutex_unlock(&netdev_flow->mutex);
1828 dp_netdev_execute_actions(dp, &key, packet, md,
1829 actions->actions, actions->size);
1830 dp_netdev_actions_unref(actions);
1831 dp_netdev_flow_unref(netdev_flow);
1832 dp_netdev_count_packet(dp, DP_STAT_HIT);
1834 dp_netdev_count_packet(dp, DP_STAT_MISS);
1835 dp_netdev_output_userspace(dp, packet, DPIF_UC_MISS, &key, NULL);
1840 dp_netdev_output_userspace(struct dp_netdev *dp, struct ofpbuf *packet,
1841 int queue_no, const struct flow *flow,
1842 const struct nlattr *userdata)
1843 OVS_EXCLUDED(dp->queue_mutex)
1845 struct dp_netdev_queue *q = &dp->queues[queue_no];
1848 ovs_mutex_lock(&dp->queue_mutex);
1849 if (q->head - q->tail < MAX_QUEUE_LEN) {
1850 struct dp_netdev_upcall *u = &q->upcalls[q->head++ & QUEUE_MASK];
1851 struct dpif_upcall *upcall = &u->upcall;
1852 struct ofpbuf *buf = &u->buf;
1855 upcall->type = queue_no;
1857 /* Allocate buffer big enough for everything. */
1858 buf_size = ODPUTIL_FLOW_KEY_BYTES;
1860 buf_size += NLA_ALIGN(userdata->nla_len);
1862 ofpbuf_init(buf, buf_size);
1865 odp_flow_key_from_flow(buf, flow, flow->in_port.odp_port);
1866 upcall->key = buf->data;
1867 upcall->key_len = buf->size;
1871 upcall->userdata = ofpbuf_put(buf, userdata,
1872 NLA_ALIGN(userdata->nla_len));
1875 /* Steal packet data. */
1876 ovs_assert(packet->source == OFPBUF_MALLOC);
1877 upcall->packet = *packet;
1878 ofpbuf_use(packet, NULL, 0);
1880 seq_change(dp->queue_seq);
1884 dp_netdev_count_packet(dp, DP_STAT_LOST);
1887 ovs_mutex_unlock(&dp->queue_mutex);
1892 struct dp_netdev_execute_aux {
1893 struct dp_netdev *dp;
1894 const struct flow *key;
1898 dp_execute_cb(void *aux_, struct ofpbuf *packet,
1899 const struct pkt_metadata *md OVS_UNUSED,
1900 const struct nlattr *a, bool may_steal)
1901 OVS_NO_THREAD_SAFETY_ANALYSIS
1903 struct dp_netdev_execute_aux *aux = aux_;
1904 int type = nl_attr_type(a);
1905 struct dp_netdev_port *p;
1907 switch ((enum ovs_action_attr)type) {
1908 case OVS_ACTION_ATTR_OUTPUT:
1909 p = dp_netdev_lookup_port(aux->dp, u32_to_odp(nl_attr_get_u32(a)));
1911 netdev_send(p->netdev, packet);
1915 case OVS_ACTION_ATTR_USERSPACE: {
1916 const struct nlattr *userdata;
1918 userdata = nl_attr_find_nested(a, OVS_USERSPACE_ATTR_USERDATA);
1920 /* Make a copy if we are not allowed to steal the packet's data. */
1922 packet = ofpbuf_clone_with_headroom(packet, DP_NETDEV_HEADROOM);
1924 dp_netdev_output_userspace(aux->dp, packet, DPIF_UC_ACTION, aux->key,
1927 ofpbuf_uninit(packet);
1931 case OVS_ACTION_ATTR_PUSH_VLAN:
1932 case OVS_ACTION_ATTR_POP_VLAN:
1933 case OVS_ACTION_ATTR_PUSH_MPLS:
1934 case OVS_ACTION_ATTR_POP_MPLS:
1935 case OVS_ACTION_ATTR_SET:
1936 case OVS_ACTION_ATTR_SAMPLE:
1937 case OVS_ACTION_ATTR_UNSPEC:
1938 case __OVS_ACTION_ATTR_MAX:
1944 dp_netdev_execute_actions(struct dp_netdev *dp, const struct flow *key,
1945 struct ofpbuf *packet, struct pkt_metadata *md,
1946 const struct nlattr *actions, size_t actions_len)
1947 OVS_REQ_RDLOCK(dp->port_rwlock)
1949 struct dp_netdev_execute_aux aux = {dp, key};
1951 odp_execute_actions(&aux, packet, md, actions, actions_len, dp_execute_cb);
1954 const struct dpif_class dpif_netdev_class = {
1956 dpif_netdev_enumerate,
1957 dpif_netdev_port_open_type,
1960 dpif_netdev_destroy,
1963 dpif_netdev_get_stats,
1964 dpif_netdev_port_add,
1965 dpif_netdev_port_del,
1966 dpif_netdev_port_query_by_number,
1967 dpif_netdev_port_query_by_name,
1968 NULL, /* port_get_pid */
1969 dpif_netdev_port_dump_start,
1970 dpif_netdev_port_dump_next,
1971 dpif_netdev_port_dump_done,
1972 dpif_netdev_port_poll,
1973 dpif_netdev_port_poll_wait,
1974 dpif_netdev_flow_get,
1975 dpif_netdev_flow_put,
1976 dpif_netdev_flow_del,
1977 dpif_netdev_flow_flush,
1978 dpif_netdev_flow_dump_state_init,
1979 dpif_netdev_flow_dump_start,
1980 dpif_netdev_flow_dump_next,
1982 dpif_netdev_flow_dump_done,
1983 dpif_netdev_flow_dump_state_uninit,
1984 dpif_netdev_execute,
1986 dpif_netdev_recv_set,
1987 dpif_netdev_queue_to_priority,
1989 dpif_netdev_recv_wait,
1990 dpif_netdev_recv_purge,
1994 dpif_dummy_change_port_number(struct unixctl_conn *conn, int argc OVS_UNUSED,
1995 const char *argv[], void *aux OVS_UNUSED)
1997 struct dp_netdev_port *port;
1998 struct dp_netdev *dp;
2001 ovs_mutex_lock(&dp_netdev_mutex);
2002 dp = shash_find_data(&dp_netdevs, argv[1]);
2003 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
2004 ovs_mutex_unlock(&dp_netdev_mutex);
2005 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
2008 ovs_refcount_ref(&dp->ref_cnt);
2009 ovs_mutex_unlock(&dp_netdev_mutex);
2011 ovs_rwlock_wrlock(&dp->port_rwlock);
2012 if (get_port_by_name(dp, argv[2], &port)) {
2013 unixctl_command_reply_error(conn, "unknown port");
2017 port_no = u32_to_odp(atoi(argv[3]));
2018 if (!port_no || port_no == ODPP_NONE) {
2019 unixctl_command_reply_error(conn, "bad port number");
2022 if (dp_netdev_lookup_port(dp, port_no)) {
2023 unixctl_command_reply_error(conn, "port number already in use");
2026 hmap_remove(&dp->ports, &port->node);
2027 port->port_no = port_no;
2028 hmap_insert(&dp->ports, &port->node, hash_int(odp_to_u32(port_no), 0));
2029 seq_change(dp->port_seq);
2030 unixctl_command_reply(conn, NULL);
2033 ovs_rwlock_unlock(&dp->port_rwlock);
2034 dp_netdev_unref(dp);
2038 dpif_dummy_register__(const char *type)
2040 struct dpif_class *class;
2042 class = xmalloc(sizeof *class);
2043 *class = dpif_netdev_class;
2044 class->type = xstrdup(type);
2045 dp_register_provider(class);
2049 dpif_dummy_register(bool override)
2056 dp_enumerate_types(&types);
2057 SSET_FOR_EACH (type, &types) {
2058 if (!dp_unregister_provider(type)) {
2059 dpif_dummy_register__(type);
2062 sset_destroy(&types);
2065 dpif_dummy_register__("dummy");
2067 unixctl_command_register("dpif-dummy/change-port-number",
2068 "DP PORT NEW-NUMBER",
2069 3, 3, dpif_dummy_change_port_number, NULL);