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-dpdk.h"
47 #include "netdev-vport.h"
49 #include "odp-execute.h"
51 #include "ofp-print.h"
55 #include "poll-loop.h"
65 VLOG_DEFINE_THIS_MODULE(dpif_netdev);
67 /* By default, choose a priority in the middle. */
68 #define NETDEV_RULE_PRIORITY 0x8000
71 /* Use per thread recirc_depth to prevent recirculation loop. */
72 #define MAX_RECIRC_DEPTH 5
73 DEFINE_STATIC_PER_THREAD_DATA(uint32_t, recirc_depth, 0)
75 /* Configuration parameters. */
76 enum { MAX_FLOWS = 65536 }; /* Maximum number of flows in flow table. */
79 enum { MAX_QUEUE_LEN = 128 }; /* Maximum number of packets per queue. */
80 enum { QUEUE_MASK = MAX_QUEUE_LEN - 1 };
81 BUILD_ASSERT_DECL(IS_POW2(MAX_QUEUE_LEN));
83 /* Protects against changes to 'dp_netdevs'. */
84 static struct ovs_mutex dp_netdev_mutex = OVS_MUTEX_INITIALIZER;
86 /* Contains all 'struct dp_netdev's. */
87 static struct shash dp_netdevs OVS_GUARDED_BY(dp_netdev_mutex)
88 = SHASH_INITIALIZER(&dp_netdevs);
90 struct dp_netdev_upcall {
91 struct dpif_upcall upcall; /* Queued upcall information. */
92 struct ofpbuf buf; /* ofpbuf instance for upcall.packet. */
95 /* A queue passing packets from a struct dp_netdev to its clients (handlers).
101 * Any access at all requires the owning 'dp_netdev''s queue_rwlock and
103 struct dp_netdev_queue {
104 struct ovs_mutex mutex;
105 struct seq *seq; /* Incremented whenever a packet is queued. */
106 struct dp_netdev_upcall upcalls[MAX_QUEUE_LEN] OVS_GUARDED;
107 unsigned int head OVS_GUARDED;
108 unsigned int tail OVS_GUARDED;
111 /* Datapath based on the network device interface from netdev.h.
117 * Some members, marked 'const', are immutable. Accessing other members
118 * requires synchronization, as noted in more detail below.
120 * Acquisition order is, from outermost to innermost:
122 * dp_netdev_mutex (global)
129 const struct dpif_class *const class;
130 const char *const name;
131 struct ovs_refcount ref_cnt;
132 atomic_flag destroyed;
136 * Readers of 'cls' and 'flow_table' must take a 'cls->rwlock' read lock.
138 * Writers of 'cls' and 'flow_table' must take the 'flow_mutex' and then
139 * the 'cls->rwlock' write lock. (The outer 'flow_mutex' allows writers to
140 * atomically perform multiple operations on 'cls' and 'flow_table'.)
142 struct ovs_mutex flow_mutex;
143 struct classifier cls; /* Classifier. Protected by cls.rwlock. */
144 struct hmap flow_table OVS_GUARDED; /* Flow table. */
148 * 'queue_rwlock' protects the modification of 'handler_queues' and
149 * 'n_handlers'. The queue elements are protected by its
150 * 'handler_queues''s mutex. */
151 struct fat_rwlock queue_rwlock;
152 struct dp_netdev_queue *handler_queues;
157 * ovsthread_stats is internally synchronized. */
158 struct ovsthread_stats stats; /* Contains 'struct dp_netdev_stats *'. */
162 * Any lookup into 'ports' or any access to the dp_netdev_ports found
163 * through 'ports' requires taking 'port_rwlock'. */
164 struct ovs_rwlock port_rwlock;
165 struct hmap ports OVS_GUARDED;
166 struct seq *port_seq; /* Incremented whenever a port changes. */
168 /* Forwarding threads. */
169 struct latch exit_latch;
170 struct pmd_thread *pmd_threads;
171 size_t n_pmd_threads;
175 static struct dp_netdev_port *dp_netdev_lookup_port(const struct dp_netdev *dp,
177 OVS_REQ_RDLOCK(dp->port_rwlock);
180 DP_STAT_HIT, /* Packets that matched in the flow table. */
181 DP_STAT_MISS, /* Packets that did not match. */
182 DP_STAT_LOST, /* Packets not passed up to the client. */
186 /* Contained by struct dp_netdev's 'stats' member. */
187 struct dp_netdev_stats {
188 struct ovs_mutex mutex; /* Protects 'n'. */
190 /* Indexed by DP_STAT_*, protected by 'mutex'. */
191 unsigned long long int n[DP_N_STATS] OVS_GUARDED;
195 /* A port in a netdev-based datapath. */
196 struct dp_netdev_port {
197 struct hmap_node node; /* Node in dp_netdev's 'ports'. */
199 struct netdev *netdev;
200 struct netdev_saved_flags *sf;
201 struct netdev_rxq **rxq;
202 struct ovs_refcount ref_cnt;
203 char *type; /* Port type as requested by user. */
206 /* A flow in dp_netdev's 'flow_table'.
212 * Except near the beginning or ending of its lifespan, rule 'rule' belongs to
213 * its dp_netdev's classifier. The text below calls this classifier 'cls'.
218 * The thread safety rules described here for "struct dp_netdev_flow" are
219 * motivated by two goals:
221 * - Prevent threads that read members of "struct dp_netdev_flow" from
222 * reading bad data due to changes by some thread concurrently modifying
225 * - Prevent two threads making changes to members of a given "struct
226 * dp_netdev_flow" from interfering with each other.
232 * A flow 'flow' may be accessed without a risk of being freed by code that
233 * holds a read-lock or write-lock on 'cls->rwlock' or that owns a reference to
234 * 'flow->ref_cnt' (or both). Code that needs to hold onto a flow for a while
235 * should take 'cls->rwlock', find the flow it needs, increment 'flow->ref_cnt'
236 * with dpif_netdev_flow_ref(), and drop 'cls->rwlock'.
238 * 'flow->ref_cnt' protects 'flow' from being freed. It doesn't protect the
239 * flow from being deleted from 'cls' (that's 'cls->rwlock') and it doesn't
240 * protect members of 'flow' from modification (that's 'flow->mutex').
242 * 'flow->mutex' protects the members of 'flow' from modification. It doesn't
243 * protect the flow from being deleted from 'cls' (that's 'cls->rwlock') and it
244 * doesn't prevent the flow from being freed (that's 'flow->ref_cnt').
246 * Some members, marked 'const', are immutable. Accessing other members
247 * requires synchronization, as noted in more detail below.
249 struct dp_netdev_flow {
250 /* Packet classification. */
251 const struct cls_rule cr; /* In owning dp_netdev's 'cls'. */
253 /* Hash table index by unmasked flow. */
254 const struct hmap_node node; /* In owning dp_netdev's 'flow_table'. */
255 const struct flow flow; /* The flow that created this entry. */
257 /* Protects members marked OVS_GUARDED.
259 * Acquire after datapath's flow_mutex. */
260 struct ovs_mutex mutex OVS_ACQ_AFTER(dp_netdev_mutex);
264 * Reading or writing these members requires 'mutex'. */
265 struct ovsthread_stats stats; /* Contains "struct dp_netdev_flow_stats". */
269 * Reading 'actions' requires 'mutex'.
270 * Writing 'actions' requires 'mutex' and (to allow for transactions) the
271 * datapath's flow_mutex. */
272 OVSRCU_TYPE(struct dp_netdev_actions *) actions;
275 static void dp_netdev_flow_free(struct dp_netdev_flow *);
277 /* Contained by struct dp_netdev_flow's 'stats' member. */
278 struct dp_netdev_flow_stats {
279 struct ovs_mutex mutex; /* Guards all the other members. */
281 long long int used OVS_GUARDED; /* Last used time, in monotonic msecs. */
282 long long int packet_count OVS_GUARDED; /* Number of packets matched. */
283 long long int byte_count OVS_GUARDED; /* Number of bytes matched. */
284 uint16_t tcp_flags OVS_GUARDED; /* Bitwise-OR of seen tcp_flags values. */
287 /* A set of datapath actions within a "struct dp_netdev_flow".
293 * A struct dp_netdev_actions 'actions' may be accessed without a risk of being
294 * freed by code that holds a read-lock or write-lock on 'flow->mutex' (where
295 * 'flow' is the dp_netdev_flow for which 'flow->actions == actions') or that
296 * owns a reference to 'actions->ref_cnt' (or both). */
297 struct dp_netdev_actions {
298 /* These members are immutable: they do not change during the struct's
300 struct nlattr *actions; /* Sequence of OVS_ACTION_ATTR_* attributes. */
301 unsigned int size; /* Size of 'actions', in bytes. */
304 struct dp_netdev_actions *dp_netdev_actions_create(const struct nlattr *,
306 struct dp_netdev_actions *dp_netdev_flow_get_actions(
307 const struct dp_netdev_flow *);
308 static void dp_netdev_actions_free(struct dp_netdev_actions *);
310 /* PMD: Poll modes drivers. PMD accesses devices via polling to eliminate
311 * the performance overhead of interrupt processing. Therefore netdev can
312 * not implement rx-wait for these devices. dpif-netdev needs to poll
313 * these device to check for recv buffer. pmd-thread does polling for
314 * devices assigned to itself thread.
316 * DPDK used PMD for accessing NIC.
318 * A thread that receives packets from PMD ports, looks them up in the flow
319 * table, and executes the actions it finds.
322 struct dp_netdev *dp;
325 atomic_uint change_seq;
329 /* Interface to netdev-based datapath. */
332 struct dp_netdev *dp;
333 uint64_t last_port_seq;
336 static int get_port_by_number(struct dp_netdev *dp, odp_port_t port_no,
337 struct dp_netdev_port **portp)
338 OVS_REQ_RDLOCK(dp->port_rwlock);
339 static int get_port_by_name(struct dp_netdev *dp, const char *devname,
340 struct dp_netdev_port **portp)
341 OVS_REQ_RDLOCK(dp->port_rwlock);
342 static void dp_netdev_free(struct dp_netdev *)
343 OVS_REQUIRES(dp_netdev_mutex);
344 static void dp_netdev_flow_flush(struct dp_netdev *);
345 static int do_add_port(struct dp_netdev *dp, const char *devname,
346 const char *type, odp_port_t port_no)
347 OVS_REQ_WRLOCK(dp->port_rwlock);
348 static int do_del_port(struct dp_netdev *dp, odp_port_t port_no)
349 OVS_REQ_WRLOCK(dp->port_rwlock);
350 static void dp_netdev_destroy_all_queues(struct dp_netdev *dp)
351 OVS_REQ_WRLOCK(dp->queue_rwlock);
352 static int dpif_netdev_open(const struct dpif_class *, const char *name,
353 bool create, struct dpif **);
354 static int dp_netdev_output_userspace(struct dp_netdev *dp, struct ofpbuf *,
355 int queue_no, int type,
357 const struct nlattr *userdata);
358 static void dp_netdev_execute_actions(struct dp_netdev *dp,
359 const struct flow *, struct ofpbuf *, bool may_steal,
360 struct pkt_metadata *,
361 const struct nlattr *actions,
363 static void dp_netdev_port_input(struct dp_netdev *dp, struct ofpbuf *packet,
364 struct pkt_metadata *);
366 static void dp_netdev_set_pmd_threads(struct dp_netdev *, int n);
368 static struct dpif_netdev *
369 dpif_netdev_cast(const struct dpif *dpif)
371 ovs_assert(dpif->dpif_class->open == dpif_netdev_open);
372 return CONTAINER_OF(dpif, struct dpif_netdev, dpif);
375 static struct dp_netdev *
376 get_dp_netdev(const struct dpif *dpif)
378 return dpif_netdev_cast(dpif)->dp;
382 dpif_netdev_enumerate(struct sset *all_dps)
384 struct shash_node *node;
386 ovs_mutex_lock(&dp_netdev_mutex);
387 SHASH_FOR_EACH(node, &dp_netdevs) {
388 sset_add(all_dps, node->name);
390 ovs_mutex_unlock(&dp_netdev_mutex);
396 dpif_netdev_class_is_dummy(const struct dpif_class *class)
398 return class != &dpif_netdev_class;
402 dpif_netdev_class_is_planetlab(const struct dpif_class *class)
404 return class == &dpif_planetlab_class;
408 dpif_netdev_port_open_type(const struct dpif_class *class, const char *type)
410 return strcmp(type, "internal") ? type
411 : dpif_netdev_class_is_planetlab(class) ? "pltap"
412 : dpif_netdev_class_is_dummy(class) ? "dummy"
417 create_dpif_netdev(struct dp_netdev *dp)
419 uint16_t netflow_id = hash_string(dp->name, 0);
420 struct dpif_netdev *dpif;
422 ovs_refcount_ref(&dp->ref_cnt);
424 dpif = xmalloc(sizeof *dpif);
425 dpif_init(&dpif->dpif, dp->class, dp->name, netflow_id >> 8, netflow_id);
427 dpif->last_port_seq = seq_read(dp->port_seq);
432 /* Choose an unused, non-zero port number and return it on success.
433 * Return ODPP_NONE on failure. */
435 choose_port(struct dp_netdev *dp, const char *name)
436 OVS_REQ_RDLOCK(dp->port_rwlock)
440 if (dp->class != &dpif_netdev_class &&
441 dp->class != &dpif_planetlab_class) {
445 /* If the port name begins with "br", start the number search at
446 * 100 to make writing tests easier. */
447 if (!strncmp(name, "br", 2)) {
451 /* If the port name contains a number, try to assign that port number.
452 * This can make writing unit tests easier because port numbers are
454 for (p = name; *p != '\0'; p++) {
455 if (isdigit((unsigned char) *p)) {
456 port_no = start_no + strtol(p, NULL, 10);
457 if (port_no > 0 && port_no != odp_to_u32(ODPP_NONE)
458 && !dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
459 return u32_to_odp(port_no);
466 for (port_no = 1; port_no <= UINT16_MAX; port_no++) {
467 if (!dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
468 return u32_to_odp(port_no);
476 create_dp_netdev(const char *name, const struct dpif_class *class,
477 struct dp_netdev **dpp)
478 OVS_REQUIRES(dp_netdev_mutex)
480 struct dp_netdev *dp;
483 dp = xzalloc(sizeof *dp);
484 shash_add(&dp_netdevs, name, dp);
486 *CONST_CAST(const struct dpif_class **, &dp->class) = class;
487 *CONST_CAST(const char **, &dp->name) = xstrdup(name);
488 ovs_refcount_init(&dp->ref_cnt);
489 atomic_flag_clear(&dp->destroyed);
491 ovs_mutex_init(&dp->flow_mutex);
492 classifier_init(&dp->cls, NULL);
493 hmap_init(&dp->flow_table);
495 fat_rwlock_init(&dp->queue_rwlock);
497 ovsthread_stats_init(&dp->stats);
499 ovs_rwlock_init(&dp->port_rwlock);
500 hmap_init(&dp->ports);
501 dp->port_seq = seq_create();
502 latch_init(&dp->exit_latch);
504 ovs_rwlock_wrlock(&dp->port_rwlock);
505 error = do_add_port(dp, name, "internal", ODPP_LOCAL);
506 ovs_rwlock_unlock(&dp->port_rwlock);
517 dpif_netdev_open(const struct dpif_class *class, const char *name,
518 bool create, struct dpif **dpifp)
520 struct dp_netdev *dp;
523 ovs_mutex_lock(&dp_netdev_mutex);
524 dp = shash_find_data(&dp_netdevs, name);
526 error = create ? create_dp_netdev(name, class, &dp) : ENODEV;
528 error = (dp->class != class ? EINVAL
533 *dpifp = create_dpif_netdev(dp);
535 ovs_mutex_unlock(&dp_netdev_mutex);
541 dp_netdev_purge_queues(struct dp_netdev *dp)
542 OVS_REQ_WRLOCK(dp->queue_rwlock)
546 for (i = 0; i < dp->n_handlers; i++) {
547 struct dp_netdev_queue *q = &dp->handler_queues[i];
549 ovs_mutex_lock(&q->mutex);
550 while (q->tail != q->head) {
551 struct dp_netdev_upcall *u = &q->upcalls[q->tail++ & QUEUE_MASK];
552 ofpbuf_uninit(&u->upcall.packet);
553 ofpbuf_uninit(&u->buf);
555 ovs_mutex_unlock(&q->mutex);
559 /* Requires dp_netdev_mutex so that we can't get a new reference to 'dp'
560 * through the 'dp_netdevs' shash while freeing 'dp'. */
562 dp_netdev_free(struct dp_netdev *dp)
563 OVS_REQUIRES(dp_netdev_mutex)
565 struct dp_netdev_port *port, *next;
566 struct dp_netdev_stats *bucket;
569 shash_find_and_delete(&dp_netdevs, dp->name);
571 dp_netdev_set_pmd_threads(dp, 0);
572 free(dp->pmd_threads);
574 dp_netdev_flow_flush(dp);
575 ovs_rwlock_wrlock(&dp->port_rwlock);
576 HMAP_FOR_EACH_SAFE (port, next, node, &dp->ports) {
577 do_del_port(dp, port->port_no);
579 ovs_rwlock_unlock(&dp->port_rwlock);
581 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
582 ovs_mutex_destroy(&bucket->mutex);
583 free_cacheline(bucket);
585 ovsthread_stats_destroy(&dp->stats);
587 fat_rwlock_wrlock(&dp->queue_rwlock);
588 dp_netdev_destroy_all_queues(dp);
589 fat_rwlock_unlock(&dp->queue_rwlock);
591 fat_rwlock_destroy(&dp->queue_rwlock);
593 classifier_destroy(&dp->cls);
594 hmap_destroy(&dp->flow_table);
595 ovs_mutex_destroy(&dp->flow_mutex);
596 seq_destroy(dp->port_seq);
597 hmap_destroy(&dp->ports);
598 latch_destroy(&dp->exit_latch);
599 free(CONST_CAST(char *, dp->name));
604 dp_netdev_unref(struct dp_netdev *dp)
607 /* Take dp_netdev_mutex so that, if dp->ref_cnt falls to zero, we can't
608 * get a new reference to 'dp' through the 'dp_netdevs' shash. */
609 ovs_mutex_lock(&dp_netdev_mutex);
610 if (ovs_refcount_unref(&dp->ref_cnt) == 1) {
613 ovs_mutex_unlock(&dp_netdev_mutex);
618 dpif_netdev_close(struct dpif *dpif)
620 struct dp_netdev *dp = get_dp_netdev(dpif);
627 dpif_netdev_destroy(struct dpif *dpif)
629 struct dp_netdev *dp = get_dp_netdev(dpif);
631 if (!atomic_flag_test_and_set(&dp->destroyed)) {
632 if (ovs_refcount_unref(&dp->ref_cnt) == 1) {
633 /* Can't happen: 'dpif' still owns a reference to 'dp'. */
642 dpif_netdev_get_stats(const struct dpif *dpif, struct dpif_dp_stats *stats)
644 struct dp_netdev *dp = get_dp_netdev(dpif);
645 struct dp_netdev_stats *bucket;
648 fat_rwlock_rdlock(&dp->cls.rwlock);
649 stats->n_flows = hmap_count(&dp->flow_table);
650 fat_rwlock_unlock(&dp->cls.rwlock);
652 stats->n_hit = stats->n_missed = stats->n_lost = 0;
653 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
654 ovs_mutex_lock(&bucket->mutex);
655 stats->n_hit += bucket->n[DP_STAT_HIT];
656 stats->n_missed += bucket->n[DP_STAT_MISS];
657 stats->n_lost += bucket->n[DP_STAT_LOST];
658 ovs_mutex_unlock(&bucket->mutex);
660 stats->n_masks = UINT32_MAX;
661 stats->n_mask_hit = UINT64_MAX;
667 dp_netdev_reload_pmd_threads(struct dp_netdev *dp)
671 for (i = 0; i < dp->n_pmd_threads; i++) {
672 struct pmd_thread *f = &dp->pmd_threads[i];
675 atomic_add(&f->change_seq, 1, &id);
680 do_add_port(struct dp_netdev *dp, const char *devname, const char *type,
682 OVS_REQ_WRLOCK(dp->port_rwlock)
684 struct netdev_saved_flags *sf;
685 struct dp_netdev_port *port;
686 struct netdev *netdev;
687 enum netdev_flags flags;
688 const char *open_type;
692 /* XXX reject devices already in some dp_netdev. */
694 /* Open and validate network device. */
695 open_type = dpif_netdev_port_open_type(dp->class, type);
696 error = netdev_open(devname, open_type, &netdev);
700 /* XXX reject non-Ethernet devices */
702 netdev_get_flags(netdev, &flags);
703 if (flags & NETDEV_LOOPBACK) {
704 VLOG_ERR("%s: cannot add a loopback device", devname);
705 netdev_close(netdev);
709 port = xzalloc(sizeof *port);
710 port->port_no = port_no;
711 port->netdev = netdev;
712 port->rxq = xmalloc(sizeof *port->rxq * netdev_n_rxq(netdev));
713 port->type = xstrdup(type);
714 for (i = 0; i < netdev_n_rxq(netdev); i++) {
715 error = netdev_rxq_open(netdev, &port->rxq[i], i);
717 && !(error == EOPNOTSUPP && dpif_netdev_class_is_dummy(dp->class))) {
718 VLOG_ERR("%s: cannot receive packets on this network device (%s)",
719 devname, ovs_strerror(errno));
720 netdev_close(netdev);
725 error = netdev_turn_flags_on(netdev, NETDEV_PROMISC, &sf);
727 for (i = 0; i < netdev_n_rxq(netdev); i++) {
728 netdev_rxq_close(port->rxq[i]);
730 netdev_close(netdev);
737 if (netdev_is_pmd(netdev)) {
739 dp_netdev_set_pmd_threads(dp, NR_THREADS);
740 dp_netdev_reload_pmd_threads(dp);
742 ovs_refcount_init(&port->ref_cnt);
744 hmap_insert(&dp->ports, &port->node, hash_int(odp_to_u32(port_no), 0));
745 seq_change(dp->port_seq);
751 dpif_netdev_port_add(struct dpif *dpif, struct netdev *netdev,
752 odp_port_t *port_nop)
754 struct dp_netdev *dp = get_dp_netdev(dpif);
755 char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
756 const char *dpif_port;
760 ovs_rwlock_wrlock(&dp->port_rwlock);
761 dpif_port = netdev_vport_get_dpif_port(netdev, namebuf, sizeof namebuf);
762 if (*port_nop != ODPP_NONE) {
764 error = dp_netdev_lookup_port(dp, *port_nop) ? EBUSY : 0;
766 port_no = choose_port(dp, dpif_port);
767 error = port_no == ODPP_NONE ? EFBIG : 0;
771 error = do_add_port(dp, dpif_port, netdev_get_type(netdev), port_no);
773 ovs_rwlock_unlock(&dp->port_rwlock);
779 dpif_netdev_port_del(struct dpif *dpif, odp_port_t port_no)
781 struct dp_netdev *dp = get_dp_netdev(dpif);
784 ovs_rwlock_wrlock(&dp->port_rwlock);
785 error = port_no == ODPP_LOCAL ? EINVAL : do_del_port(dp, port_no);
786 ovs_rwlock_unlock(&dp->port_rwlock);
792 is_valid_port_number(odp_port_t port_no)
794 return port_no != ODPP_NONE;
797 static struct dp_netdev_port *
798 dp_netdev_lookup_port(const struct dp_netdev *dp, odp_port_t port_no)
799 OVS_REQ_RDLOCK(dp->port_rwlock)
801 struct dp_netdev_port *port;
803 HMAP_FOR_EACH_IN_BUCKET (port, node, hash_int(odp_to_u32(port_no), 0),
805 if (port->port_no == port_no) {
813 get_port_by_number(struct dp_netdev *dp,
814 odp_port_t port_no, struct dp_netdev_port **portp)
815 OVS_REQ_RDLOCK(dp->port_rwlock)
817 if (!is_valid_port_number(port_no)) {
821 *portp = dp_netdev_lookup_port(dp, port_no);
822 return *portp ? 0 : ENOENT;
827 port_ref(struct dp_netdev_port *port)
830 ovs_refcount_ref(&port->ref_cnt);
835 port_unref(struct dp_netdev_port *port)
837 if (port && ovs_refcount_unref(&port->ref_cnt) == 1) {
840 netdev_close(port->netdev);
841 netdev_restore_flags(port->sf);
843 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
844 netdev_rxq_close(port->rxq[i]);
852 get_port_by_name(struct dp_netdev *dp,
853 const char *devname, struct dp_netdev_port **portp)
854 OVS_REQ_RDLOCK(dp->port_rwlock)
856 struct dp_netdev_port *port;
858 HMAP_FOR_EACH (port, node, &dp->ports) {
859 if (!strcmp(netdev_get_name(port->netdev), devname)) {
868 do_del_port(struct dp_netdev *dp, odp_port_t port_no)
869 OVS_REQ_WRLOCK(dp->port_rwlock)
871 struct dp_netdev_port *port;
874 error = get_port_by_number(dp, port_no, &port);
879 hmap_remove(&dp->ports, &port->node);
880 seq_change(dp->port_seq);
881 if (netdev_is_pmd(port->netdev)) {
882 dp_netdev_reload_pmd_threads(dp);
890 answer_port_query(const struct dp_netdev_port *port,
891 struct dpif_port *dpif_port)
893 dpif_port->name = xstrdup(netdev_get_name(port->netdev));
894 dpif_port->type = xstrdup(port->type);
895 dpif_port->port_no = port->port_no;
899 dpif_netdev_port_query_by_number(const struct dpif *dpif, odp_port_t port_no,
900 struct dpif_port *dpif_port)
902 struct dp_netdev *dp = get_dp_netdev(dpif);
903 struct dp_netdev_port *port;
906 ovs_rwlock_rdlock(&dp->port_rwlock);
907 error = get_port_by_number(dp, port_no, &port);
908 if (!error && dpif_port) {
909 answer_port_query(port, dpif_port);
911 ovs_rwlock_unlock(&dp->port_rwlock);
917 dpif_netdev_port_query_by_name(const struct dpif *dpif, const char *devname,
918 struct dpif_port *dpif_port)
920 struct dp_netdev *dp = get_dp_netdev(dpif);
921 struct dp_netdev_port *port;
924 ovs_rwlock_rdlock(&dp->port_rwlock);
925 error = get_port_by_name(dp, devname, &port);
926 if (!error && dpif_port) {
927 answer_port_query(port, dpif_port);
929 ovs_rwlock_unlock(&dp->port_rwlock);
935 dp_netdev_flow_free(struct dp_netdev_flow *flow)
937 struct dp_netdev_flow_stats *bucket;
940 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &flow->stats) {
941 ovs_mutex_destroy(&bucket->mutex);
942 free_cacheline(bucket);
944 ovsthread_stats_destroy(&flow->stats);
946 cls_rule_destroy(CONST_CAST(struct cls_rule *, &flow->cr));
947 dp_netdev_actions_free(dp_netdev_flow_get_actions(flow));
948 ovs_mutex_destroy(&flow->mutex);
953 dp_netdev_remove_flow(struct dp_netdev *dp, struct dp_netdev_flow *flow)
954 OVS_REQ_WRLOCK(dp->cls.rwlock)
955 OVS_REQUIRES(dp->flow_mutex)
957 struct cls_rule *cr = CONST_CAST(struct cls_rule *, &flow->cr);
958 struct hmap_node *node = CONST_CAST(struct hmap_node *, &flow->node);
960 classifier_remove(&dp->cls, cr);
961 hmap_remove(&dp->flow_table, node);
962 ovsrcu_postpone(dp_netdev_flow_free, flow);
966 dp_netdev_flow_flush(struct dp_netdev *dp)
968 struct dp_netdev_flow *netdev_flow, *next;
970 ovs_mutex_lock(&dp->flow_mutex);
971 fat_rwlock_wrlock(&dp->cls.rwlock);
972 HMAP_FOR_EACH_SAFE (netdev_flow, next, node, &dp->flow_table) {
973 dp_netdev_remove_flow(dp, netdev_flow);
975 fat_rwlock_unlock(&dp->cls.rwlock);
976 ovs_mutex_unlock(&dp->flow_mutex);
980 dpif_netdev_flow_flush(struct dpif *dpif)
982 struct dp_netdev *dp = get_dp_netdev(dpif);
984 dp_netdev_flow_flush(dp);
988 struct dp_netdev_port_state {
995 dpif_netdev_port_dump_start(const struct dpif *dpif OVS_UNUSED, void **statep)
997 *statep = xzalloc(sizeof(struct dp_netdev_port_state));
1002 dpif_netdev_port_dump_next(const struct dpif *dpif, void *state_,
1003 struct dpif_port *dpif_port)
1005 struct dp_netdev_port_state *state = state_;
1006 struct dp_netdev *dp = get_dp_netdev(dpif);
1007 struct hmap_node *node;
1010 ovs_rwlock_rdlock(&dp->port_rwlock);
1011 node = hmap_at_position(&dp->ports, &state->bucket, &state->offset);
1013 struct dp_netdev_port *port;
1015 port = CONTAINER_OF(node, struct dp_netdev_port, node);
1018 state->name = xstrdup(netdev_get_name(port->netdev));
1019 dpif_port->name = state->name;
1020 dpif_port->type = port->type;
1021 dpif_port->port_no = port->port_no;
1027 ovs_rwlock_unlock(&dp->port_rwlock);
1033 dpif_netdev_port_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
1035 struct dp_netdev_port_state *state = state_;
1042 dpif_netdev_port_poll(const struct dpif *dpif_, char **devnamep OVS_UNUSED)
1044 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
1045 uint64_t new_port_seq;
1048 new_port_seq = seq_read(dpif->dp->port_seq);
1049 if (dpif->last_port_seq != new_port_seq) {
1050 dpif->last_port_seq = new_port_seq;
1060 dpif_netdev_port_poll_wait(const struct dpif *dpif_)
1062 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
1064 seq_wait(dpif->dp->port_seq, dpif->last_port_seq);
1067 static struct dp_netdev_flow *
1068 dp_netdev_flow_cast(const struct cls_rule *cr)
1070 return cr ? CONTAINER_OF(cr, struct dp_netdev_flow, cr) : NULL;
1073 static struct dp_netdev_flow *
1074 dp_netdev_lookup_flow(const struct dp_netdev *dp, const struct flow *flow)
1075 OVS_EXCLUDED(dp->cls.rwlock)
1077 struct dp_netdev_flow *netdev_flow;
1079 fat_rwlock_rdlock(&dp->cls.rwlock);
1080 netdev_flow = dp_netdev_flow_cast(classifier_lookup(&dp->cls, flow, NULL));
1081 fat_rwlock_unlock(&dp->cls.rwlock);
1086 static struct dp_netdev_flow *
1087 dp_netdev_find_flow(const struct dp_netdev *dp, const struct flow *flow)
1088 OVS_REQ_RDLOCK(dp->cls.rwlock)
1090 struct dp_netdev_flow *netdev_flow;
1092 HMAP_FOR_EACH_WITH_HASH (netdev_flow, node, flow_hash(flow, 0),
1094 if (flow_equal(&netdev_flow->flow, flow)) {
1103 get_dpif_flow_stats(struct dp_netdev_flow *netdev_flow,
1104 struct dpif_flow_stats *stats)
1106 struct dp_netdev_flow_stats *bucket;
1109 memset(stats, 0, sizeof *stats);
1110 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
1111 ovs_mutex_lock(&bucket->mutex);
1112 stats->n_packets += bucket->packet_count;
1113 stats->n_bytes += bucket->byte_count;
1114 stats->used = MAX(stats->used, bucket->used);
1115 stats->tcp_flags |= bucket->tcp_flags;
1116 ovs_mutex_unlock(&bucket->mutex);
1121 dpif_netdev_mask_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1122 const struct nlattr *mask_key,
1123 uint32_t mask_key_len, const struct flow *flow,
1127 enum odp_key_fitness fitness;
1129 fitness = odp_flow_key_to_mask(mask_key, mask_key_len, mask, flow);
1131 /* This should not happen: it indicates that
1132 * odp_flow_key_from_mask() and odp_flow_key_to_mask()
1133 * disagree on the acceptable form of a mask. Log the problem
1134 * as an error, with enough details to enable debugging. */
1135 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1137 if (!VLOG_DROP_ERR(&rl)) {
1141 odp_flow_format(key, key_len, mask_key, mask_key_len, NULL, &s,
1143 VLOG_ERR("internal error parsing flow mask %s (%s)",
1144 ds_cstr(&s), odp_key_fitness_to_string(fitness));
1151 enum mf_field_id id;
1152 /* No mask key, unwildcard everything except fields whose
1153 * prerequisities are not met. */
1154 memset(mask, 0x0, sizeof *mask);
1156 for (id = 0; id < MFF_N_IDS; ++id) {
1157 /* Skip registers and metadata. */
1158 if (!(id >= MFF_REG0 && id < MFF_REG0 + FLOW_N_REGS)
1159 && id != MFF_METADATA) {
1160 const struct mf_field *mf = mf_from_id(id);
1161 if (mf_are_prereqs_ok(mf, flow)) {
1162 mf_mask_field(mf, mask);
1168 /* Force unwildcard the in_port.
1170 * We need to do this even in the case where we unwildcard "everything"
1171 * above because "everything" only includes the 16-bit OpenFlow port number
1172 * mask->in_port.ofp_port, which only covers half of the 32-bit datapath
1173 * port number mask->in_port.odp_port. */
1174 mask->in_port.odp_port = u32_to_odp(UINT32_MAX);
1180 dpif_netdev_flow_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1185 if (odp_flow_key_to_flow(key, key_len, flow)) {
1186 /* This should not happen: it indicates that odp_flow_key_from_flow()
1187 * and odp_flow_key_to_flow() disagree on the acceptable form of a
1188 * flow. Log the problem as an error, with enough details to enable
1190 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1192 if (!VLOG_DROP_ERR(&rl)) {
1196 odp_flow_format(key, key_len, NULL, 0, NULL, &s, true);
1197 VLOG_ERR("internal error parsing flow key %s", ds_cstr(&s));
1204 in_port = flow->in_port.odp_port;
1205 if (!is_valid_port_number(in_port) && in_port != ODPP_NONE) {
1213 dpif_netdev_flow_get(const struct dpif *dpif,
1214 const struct nlattr *nl_key, size_t nl_key_len,
1215 struct ofpbuf **actionsp, struct dpif_flow_stats *stats)
1217 struct dp_netdev *dp = get_dp_netdev(dpif);
1218 struct dp_netdev_flow *netdev_flow;
1222 error = dpif_netdev_flow_from_nlattrs(nl_key, nl_key_len, &key);
1227 fat_rwlock_rdlock(&dp->cls.rwlock);
1228 netdev_flow = dp_netdev_find_flow(dp, &key);
1229 fat_rwlock_unlock(&dp->cls.rwlock);
1233 get_dpif_flow_stats(netdev_flow, stats);
1237 struct dp_netdev_actions *actions;
1239 actions = dp_netdev_flow_get_actions(netdev_flow);
1240 *actionsp = ofpbuf_clone_data(actions->actions, actions->size);
1250 dp_netdev_flow_add(struct dp_netdev *dp, const struct flow *flow,
1251 const struct flow_wildcards *wc,
1252 const struct nlattr *actions,
1254 OVS_REQUIRES(dp->flow_mutex)
1256 struct dp_netdev_flow *netdev_flow;
1259 netdev_flow = xzalloc(sizeof *netdev_flow);
1260 *CONST_CAST(struct flow *, &netdev_flow->flow) = *flow;
1262 ovs_mutex_init(&netdev_flow->mutex);
1264 ovsthread_stats_init(&netdev_flow->stats);
1266 ovsrcu_set(&netdev_flow->actions,
1267 dp_netdev_actions_create(actions, actions_len));
1269 match_init(&match, flow, wc);
1270 cls_rule_init(CONST_CAST(struct cls_rule *, &netdev_flow->cr),
1271 &match, NETDEV_RULE_PRIORITY);
1272 fat_rwlock_wrlock(&dp->cls.rwlock);
1273 classifier_insert(&dp->cls,
1274 CONST_CAST(struct cls_rule *, &netdev_flow->cr));
1275 hmap_insert(&dp->flow_table,
1276 CONST_CAST(struct hmap_node *, &netdev_flow->node),
1277 flow_hash(flow, 0));
1278 fat_rwlock_unlock(&dp->cls.rwlock);
1284 clear_stats(struct dp_netdev_flow *netdev_flow)
1286 struct dp_netdev_flow_stats *bucket;
1289 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
1290 ovs_mutex_lock(&bucket->mutex);
1292 bucket->packet_count = 0;
1293 bucket->byte_count = 0;
1294 bucket->tcp_flags = 0;
1295 ovs_mutex_unlock(&bucket->mutex);
1300 dpif_netdev_flow_put(struct dpif *dpif, const struct dpif_flow_put *put)
1302 struct dp_netdev *dp = get_dp_netdev(dpif);
1303 struct dp_netdev_flow *netdev_flow;
1305 struct flow_wildcards wc;
1308 error = dpif_netdev_flow_from_nlattrs(put->key, put->key_len, &flow);
1312 error = dpif_netdev_mask_from_nlattrs(put->key, put->key_len,
1313 put->mask, put->mask_len,
1319 ovs_mutex_lock(&dp->flow_mutex);
1320 netdev_flow = dp_netdev_lookup_flow(dp, &flow);
1322 if (put->flags & DPIF_FP_CREATE) {
1323 if (hmap_count(&dp->flow_table) < MAX_FLOWS) {
1325 memset(put->stats, 0, sizeof *put->stats);
1327 error = dp_netdev_flow_add(dp, &flow, &wc, put->actions,
1336 if (put->flags & DPIF_FP_MODIFY
1337 && flow_equal(&flow, &netdev_flow->flow)) {
1338 struct dp_netdev_actions *new_actions;
1339 struct dp_netdev_actions *old_actions;
1341 new_actions = dp_netdev_actions_create(put->actions,
1344 old_actions = dp_netdev_flow_get_actions(netdev_flow);
1345 ovsrcu_set(&netdev_flow->actions, new_actions);
1348 get_dpif_flow_stats(netdev_flow, put->stats);
1350 if (put->flags & DPIF_FP_ZERO_STATS) {
1351 clear_stats(netdev_flow);
1354 ovsrcu_postpone(dp_netdev_actions_free, old_actions);
1355 } else if (put->flags & DPIF_FP_CREATE) {
1358 /* Overlapping flow. */
1362 ovs_mutex_unlock(&dp->flow_mutex);
1368 dpif_netdev_flow_del(struct dpif *dpif, const struct dpif_flow_del *del)
1370 struct dp_netdev *dp = get_dp_netdev(dpif);
1371 struct dp_netdev_flow *netdev_flow;
1375 error = dpif_netdev_flow_from_nlattrs(del->key, del->key_len, &key);
1380 ovs_mutex_lock(&dp->flow_mutex);
1381 fat_rwlock_wrlock(&dp->cls.rwlock);
1382 netdev_flow = dp_netdev_find_flow(dp, &key);
1385 get_dpif_flow_stats(netdev_flow, del->stats);
1387 dp_netdev_remove_flow(dp, netdev_flow);
1391 fat_rwlock_unlock(&dp->cls.rwlock);
1392 ovs_mutex_unlock(&dp->flow_mutex);
1397 struct dp_netdev_flow_state {
1398 struct dp_netdev_actions *actions;
1399 struct odputil_keybuf keybuf;
1400 struct odputil_keybuf maskbuf;
1401 struct dpif_flow_stats stats;
1404 struct dp_netdev_flow_iter {
1408 struct ovs_mutex mutex;
1412 dpif_netdev_flow_dump_state_init(void **statep)
1414 struct dp_netdev_flow_state *state;
1416 *statep = state = xmalloc(sizeof *state);
1417 state->actions = NULL;
1421 dpif_netdev_flow_dump_state_uninit(void *state_)
1423 struct dp_netdev_flow_state *state = state_;
1429 dpif_netdev_flow_dump_start(const struct dpif *dpif OVS_UNUSED, void **iterp)
1431 struct dp_netdev_flow_iter *iter;
1433 *iterp = iter = xmalloc(sizeof *iter);
1437 ovs_mutex_init(&iter->mutex);
1441 /* XXX the caller must use 'actions' without quiescing */
1443 dpif_netdev_flow_dump_next(const struct dpif *dpif, void *iter_, void *state_,
1444 const struct nlattr **key, size_t *key_len,
1445 const struct nlattr **mask, size_t *mask_len,
1446 const struct nlattr **actions, size_t *actions_len,
1447 const struct dpif_flow_stats **stats)
1449 struct dp_netdev_flow_iter *iter = iter_;
1450 struct dp_netdev_flow_state *state = state_;
1451 struct dp_netdev *dp = get_dp_netdev(dpif);
1452 struct dp_netdev_flow *netdev_flow;
1455 ovs_mutex_lock(&iter->mutex);
1456 error = iter->status;
1458 struct hmap_node *node;
1460 fat_rwlock_rdlock(&dp->cls.rwlock);
1461 node = hmap_at_position(&dp->flow_table, &iter->bucket, &iter->offset);
1463 netdev_flow = CONTAINER_OF(node, struct dp_netdev_flow, node);
1465 fat_rwlock_unlock(&dp->cls.rwlock);
1467 iter->status = error = EOF;
1470 ovs_mutex_unlock(&iter->mutex);
1478 ofpbuf_use_stack(&buf, &state->keybuf, sizeof state->keybuf);
1479 odp_flow_key_from_flow(&buf, &netdev_flow->flow,
1480 netdev_flow->flow.in_port.odp_port);
1482 *key = ofpbuf_data(&buf);
1483 *key_len = ofpbuf_size(&buf);
1488 struct flow_wildcards wc;
1490 ofpbuf_use_stack(&buf, &state->maskbuf, sizeof state->maskbuf);
1491 minimask_expand(&netdev_flow->cr.match.mask, &wc);
1492 odp_flow_key_from_mask(&buf, &wc.masks, &netdev_flow->flow,
1493 odp_to_u32(wc.masks.in_port.odp_port),
1496 *mask = ofpbuf_data(&buf);
1497 *mask_len = ofpbuf_size(&buf);
1500 if (actions || stats) {
1501 state->actions = NULL;
1504 state->actions = dp_netdev_flow_get_actions(netdev_flow);
1505 *actions = state->actions->actions;
1506 *actions_len = state->actions->size;
1510 get_dpif_flow_stats(netdev_flow, &state->stats);
1511 *stats = &state->stats;
1519 dpif_netdev_flow_dump_done(const struct dpif *dpif OVS_UNUSED, void *iter_)
1521 struct dp_netdev_flow_iter *iter = iter_;
1523 ovs_mutex_destroy(&iter->mutex);
1529 dpif_netdev_execute(struct dpif *dpif, struct dpif_execute *execute)
1531 struct dp_netdev *dp = get_dp_netdev(dpif);
1532 struct pkt_metadata *md = &execute->md;
1535 if (ofpbuf_size(execute->packet) < ETH_HEADER_LEN ||
1536 ofpbuf_size(execute->packet) > UINT16_MAX) {
1540 /* Extract flow key. */
1541 flow_extract(execute->packet, md, &key);
1543 ovs_rwlock_rdlock(&dp->port_rwlock);
1544 dp_netdev_execute_actions(dp, &key, execute->packet, false, md,
1545 execute->actions, execute->actions_len);
1546 ovs_rwlock_unlock(&dp->port_rwlock);
1552 dp_netdev_destroy_all_queues(struct dp_netdev *dp)
1553 OVS_REQ_WRLOCK(dp->queue_rwlock)
1557 dp_netdev_purge_queues(dp);
1559 for (i = 0; i < dp->n_handlers; i++) {
1560 struct dp_netdev_queue *q = &dp->handler_queues[i];
1562 ovs_mutex_destroy(&q->mutex);
1563 seq_destroy(q->seq);
1565 free(dp->handler_queues);
1566 dp->handler_queues = NULL;
1571 dp_netdev_refresh_queues(struct dp_netdev *dp, uint32_t n_handlers)
1572 OVS_REQ_WRLOCK(dp->queue_rwlock)
1574 if (dp->n_handlers != n_handlers) {
1577 dp_netdev_destroy_all_queues(dp);
1579 dp->n_handlers = n_handlers;
1580 dp->handler_queues = xzalloc(n_handlers * sizeof *dp->handler_queues);
1582 for (i = 0; i < n_handlers; i++) {
1583 struct dp_netdev_queue *q = &dp->handler_queues[i];
1585 ovs_mutex_init(&q->mutex);
1586 q->seq = seq_create();
1592 dpif_netdev_recv_set(struct dpif *dpif, bool enable)
1594 struct dp_netdev *dp = get_dp_netdev(dpif);
1596 if ((dp->handler_queues != NULL) == enable) {
1600 fat_rwlock_wrlock(&dp->queue_rwlock);
1602 dp_netdev_destroy_all_queues(dp);
1604 dp_netdev_refresh_queues(dp, 1);
1606 fat_rwlock_unlock(&dp->queue_rwlock);
1612 dpif_netdev_handlers_set(struct dpif *dpif, uint32_t n_handlers)
1614 struct dp_netdev *dp = get_dp_netdev(dpif);
1616 fat_rwlock_wrlock(&dp->queue_rwlock);
1617 if (dp->handler_queues) {
1618 dp_netdev_refresh_queues(dp, n_handlers);
1620 fat_rwlock_unlock(&dp->queue_rwlock);
1626 dpif_netdev_queue_to_priority(const struct dpif *dpif OVS_UNUSED,
1627 uint32_t queue_id, uint32_t *priority)
1629 *priority = queue_id;
1634 dp_netdev_recv_check(const struct dp_netdev *dp, const uint32_t handler_id)
1635 OVS_REQ_RDLOCK(dp->queue_rwlock)
1637 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1639 if (!dp->handler_queues) {
1640 VLOG_WARN_RL(&rl, "receiving upcall disabled");
1644 if (handler_id >= dp->n_handlers) {
1645 VLOG_WARN_RL(&rl, "handler index out of bound");
1653 dpif_netdev_recv(struct dpif *dpif, uint32_t handler_id,
1654 struct dpif_upcall *upcall, struct ofpbuf *buf)
1656 struct dp_netdev *dp = get_dp_netdev(dpif);
1657 struct dp_netdev_queue *q;
1660 fat_rwlock_rdlock(&dp->queue_rwlock);
1662 if (!dp_netdev_recv_check(dp, handler_id)) {
1667 q = &dp->handler_queues[handler_id];
1668 ovs_mutex_lock(&q->mutex);
1669 if (q->head != q->tail) {
1670 struct dp_netdev_upcall *u = &q->upcalls[q->tail++ & QUEUE_MASK];
1672 *upcall = u->upcall;
1679 ovs_mutex_unlock(&q->mutex);
1682 fat_rwlock_unlock(&dp->queue_rwlock);
1688 dpif_netdev_recv_wait(struct dpif *dpif, uint32_t handler_id)
1690 struct dp_netdev *dp = get_dp_netdev(dpif);
1691 struct dp_netdev_queue *q;
1694 fat_rwlock_rdlock(&dp->queue_rwlock);
1696 if (!dp_netdev_recv_check(dp, handler_id)) {
1700 q = &dp->handler_queues[handler_id];
1701 ovs_mutex_lock(&q->mutex);
1702 seq = seq_read(q->seq);
1703 if (q->head != q->tail) {
1704 poll_immediate_wake();
1706 seq_wait(q->seq, seq);
1709 ovs_mutex_unlock(&q->mutex);
1712 fat_rwlock_unlock(&dp->queue_rwlock);
1716 dpif_netdev_recv_purge(struct dpif *dpif)
1718 struct dpif_netdev *dpif_netdev = dpif_netdev_cast(dpif);
1720 fat_rwlock_wrlock(&dpif_netdev->dp->queue_rwlock);
1721 dp_netdev_purge_queues(dpif_netdev->dp);
1722 fat_rwlock_unlock(&dpif_netdev->dp->queue_rwlock);
1725 /* Creates and returns a new 'struct dp_netdev_actions', with a reference count
1726 * of 1, whose actions are a copy of from the 'ofpacts_len' bytes of
1728 struct dp_netdev_actions *
1729 dp_netdev_actions_create(const struct nlattr *actions, size_t size)
1731 struct dp_netdev_actions *netdev_actions;
1733 netdev_actions = xmalloc(sizeof *netdev_actions);
1734 netdev_actions->actions = xmemdup(actions, size);
1735 netdev_actions->size = size;
1737 return netdev_actions;
1740 struct dp_netdev_actions *
1741 dp_netdev_flow_get_actions(const struct dp_netdev_flow *flow)
1743 return ovsrcu_get(struct dp_netdev_actions *, &flow->actions);
1747 dp_netdev_actions_free(struct dp_netdev_actions *actions)
1749 free(actions->actions);
1755 dp_netdev_process_rxq_port(struct dp_netdev *dp,
1756 struct dp_netdev_port *port,
1757 struct netdev_rxq *rxq)
1759 struct ofpbuf *packet[NETDEV_MAX_RX_BATCH];
1762 error = netdev_rxq_recv(rxq, packet, &c);
1764 struct pkt_metadata md = PKT_METADATA_INITIALIZER(port->port_no);
1767 for (i = 0; i < c; i++) {
1768 dp_netdev_port_input(dp, packet[i], &md);
1770 } else if (error != EAGAIN && error != EOPNOTSUPP) {
1771 static struct vlog_rate_limit rl
1772 = VLOG_RATE_LIMIT_INIT(1, 5);
1774 VLOG_ERR_RL(&rl, "error receiving data from %s: %s",
1775 netdev_get_name(port->netdev),
1776 ovs_strerror(error));
1781 dpif_netdev_run(struct dpif *dpif)
1783 struct dp_netdev_port *port;
1784 struct dp_netdev *dp = get_dp_netdev(dpif);
1786 ovs_rwlock_rdlock(&dp->port_rwlock);
1788 HMAP_FOR_EACH (port, node, &dp->ports) {
1789 if (!netdev_is_pmd(port->netdev)) {
1792 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
1793 dp_netdev_process_rxq_port(dp, port, port->rxq[i]);
1798 ovs_rwlock_unlock(&dp->port_rwlock);
1802 dpif_netdev_wait(struct dpif *dpif)
1804 struct dp_netdev_port *port;
1805 struct dp_netdev *dp = get_dp_netdev(dpif);
1807 ovs_rwlock_rdlock(&dp->port_rwlock);
1809 HMAP_FOR_EACH (port, node, &dp->ports) {
1810 if (!netdev_is_pmd(port->netdev)) {
1813 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
1814 netdev_rxq_wait(port->rxq[i]);
1818 ovs_rwlock_unlock(&dp->port_rwlock);
1822 struct dp_netdev_port *port;
1823 struct netdev_rxq *rx;
1827 pmd_load_queues(struct pmd_thread *f,
1828 struct rxq_poll **ppoll_list, int poll_cnt)
1830 struct dp_netdev *dp = f->dp;
1831 struct rxq_poll *poll_list = *ppoll_list;
1832 struct dp_netdev_port *port;
1837 /* Simple scheduler for netdev rx polling. */
1838 ovs_rwlock_rdlock(&dp->port_rwlock);
1839 for (i = 0; i < poll_cnt; i++) {
1840 port_unref(poll_list[i].port);
1846 HMAP_FOR_EACH (port, node, &f->dp->ports) {
1847 if (netdev_is_pmd(port->netdev)) {
1850 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
1851 if ((index % dp->n_pmd_threads) == id) {
1852 poll_list = xrealloc(poll_list, sizeof *poll_list * (poll_cnt + 1));
1855 poll_list[poll_cnt].port = port;
1856 poll_list[poll_cnt].rx = port->rxq[i];
1864 ovs_rwlock_unlock(&dp->port_rwlock);
1865 *ppoll_list = poll_list;
1870 pmd_thread_main(void *f_)
1872 struct pmd_thread *f = f_;
1873 struct dp_netdev *dp = f->dp;
1874 unsigned int lc = 0;
1875 struct rxq_poll *poll_list;
1876 unsigned int port_seq;
1880 f->name = xasprintf("pmd_%u", ovsthread_id_self());
1881 set_subprogram_name("%s", f->name);
1885 pmd_thread_setaffinity_cpu(f->id);
1887 poll_cnt = pmd_load_queues(f, &poll_list, poll_cnt);
1888 atomic_read(&f->change_seq, &port_seq);
1891 unsigned int c_port_seq;
1894 for (i = 0; i < poll_cnt; i++) {
1895 dp_netdev_process_rxq_port(dp, poll_list[i].port, poll_list[i].rx);
1901 /* TODO: need completely userspace based signaling method.
1902 * to keep this thread entirely in userspace.
1903 * For now using atomic counter. */
1905 atomic_read_explicit(&f->change_seq, &c_port_seq, memory_order_consume);
1906 if (c_port_seq != port_seq) {
1912 if (!latch_is_set(&f->dp->exit_latch)){
1916 for (i = 0; i < poll_cnt; i++) {
1917 port_unref(poll_list[i].port);
1926 dp_netdev_set_pmd_threads(struct dp_netdev *dp, int n)
1930 if (n == dp->n_pmd_threads) {
1934 /* Stop existing threads. */
1935 latch_set(&dp->exit_latch);
1936 dp_netdev_reload_pmd_threads(dp);
1937 for (i = 0; i < dp->n_pmd_threads; i++) {
1938 struct pmd_thread *f = &dp->pmd_threads[i];
1940 xpthread_join(f->thread, NULL);
1942 latch_poll(&dp->exit_latch);
1943 free(dp->pmd_threads);
1945 /* Start new threads. */
1946 dp->pmd_threads = xmalloc(n * sizeof *dp->pmd_threads);
1947 dp->n_pmd_threads = n;
1949 for (i = 0; i < n; i++) {
1950 struct pmd_thread *f = &dp->pmd_threads[i];
1954 atomic_store(&f->change_seq, 1);
1956 /* Each thread will distribute all devices rx-queues among
1958 xpthread_create(&f->thread, NULL, pmd_thread_main, f);
1964 dp_netdev_flow_stats_new_cb(void)
1966 struct dp_netdev_flow_stats *bucket = xzalloc_cacheline(sizeof *bucket);
1967 ovs_mutex_init(&bucket->mutex);
1972 dp_netdev_flow_used(struct dp_netdev_flow *netdev_flow,
1973 const struct ofpbuf *packet,
1974 const struct flow *key)
1976 uint16_t tcp_flags = ntohs(key->tcp_flags);
1977 long long int now = time_msec();
1978 struct dp_netdev_flow_stats *bucket;
1980 bucket = ovsthread_stats_bucket_get(&netdev_flow->stats,
1981 dp_netdev_flow_stats_new_cb);
1983 ovs_mutex_lock(&bucket->mutex);
1984 bucket->used = MAX(now, bucket->used);
1985 bucket->packet_count++;
1986 bucket->byte_count += ofpbuf_size(packet);
1987 bucket->tcp_flags |= tcp_flags;
1988 ovs_mutex_unlock(&bucket->mutex);
1992 dp_netdev_stats_new_cb(void)
1994 struct dp_netdev_stats *bucket = xzalloc_cacheline(sizeof *bucket);
1995 ovs_mutex_init(&bucket->mutex);
2000 dp_netdev_count_packet(struct dp_netdev *dp, enum dp_stat_type type)
2002 struct dp_netdev_stats *bucket;
2004 bucket = ovsthread_stats_bucket_get(&dp->stats, dp_netdev_stats_new_cb);
2005 ovs_mutex_lock(&bucket->mutex);
2007 ovs_mutex_unlock(&bucket->mutex);
2011 dp_netdev_input(struct dp_netdev *dp, struct ofpbuf *packet,
2012 struct pkt_metadata *md)
2013 OVS_REQ_RDLOCK(dp->port_rwlock)
2015 struct dp_netdev_flow *netdev_flow;
2018 if (ofpbuf_size(packet) < ETH_HEADER_LEN) {
2019 ofpbuf_delete(packet);
2022 flow_extract(packet, md, &key);
2023 netdev_flow = dp_netdev_lookup_flow(dp, &key);
2025 struct dp_netdev_actions *actions;
2027 dp_netdev_flow_used(netdev_flow, packet, &key);
2029 actions = dp_netdev_flow_get_actions(netdev_flow);
2030 dp_netdev_execute_actions(dp, &key, packet, true, md,
2031 actions->actions, actions->size);
2032 dp_netdev_count_packet(dp, DP_STAT_HIT);
2033 } else if (dp->handler_queues) {
2034 dp_netdev_count_packet(dp, DP_STAT_MISS);
2035 dp_netdev_output_userspace(dp, packet,
2036 flow_hash_5tuple(&key, 0) % dp->n_handlers,
2037 DPIF_UC_MISS, &key, NULL);
2038 ofpbuf_delete(packet);
2043 dp_netdev_port_input(struct dp_netdev *dp, struct ofpbuf *packet,
2044 struct pkt_metadata *md)
2045 OVS_REQ_RDLOCK(dp->port_rwlock)
2047 uint32_t *recirc_depth = recirc_depth_get();
2050 dp_netdev_input(dp, packet, md);
2054 dp_netdev_output_userspace(struct dp_netdev *dp, struct ofpbuf *packet,
2055 int queue_no, int type, const struct flow *flow,
2056 const struct nlattr *userdata)
2058 struct dp_netdev_queue *q;
2061 fat_rwlock_rdlock(&dp->queue_rwlock);
2062 q = &dp->handler_queues[queue_no];
2063 ovs_mutex_lock(&q->mutex);
2064 if (q->head - q->tail < MAX_QUEUE_LEN) {
2065 struct dp_netdev_upcall *u = &q->upcalls[q->head++ & QUEUE_MASK];
2066 struct dpif_upcall *upcall = &u->upcall;
2067 struct ofpbuf *buf = &u->buf;
2070 upcall->type = type;
2072 /* Allocate buffer big enough for everything. */
2073 buf_size = ODPUTIL_FLOW_KEY_BYTES;
2075 buf_size += NLA_ALIGN(userdata->nla_len);
2077 buf_size += ofpbuf_size(packet);
2078 ofpbuf_init(buf, buf_size);
2081 odp_flow_key_from_flow(buf, flow, flow->in_port.odp_port);
2082 upcall->key = ofpbuf_data(buf);
2083 upcall->key_len = ofpbuf_size(buf);
2087 upcall->userdata = ofpbuf_put(buf, userdata,
2088 NLA_ALIGN(userdata->nla_len));
2091 ofpbuf_set_data(&upcall->packet,
2092 ofpbuf_put(buf, ofpbuf_data(packet), ofpbuf_size(packet)));
2093 ofpbuf_set_size(&upcall->packet, ofpbuf_size(packet));
2099 dp_netdev_count_packet(dp, DP_STAT_LOST);
2102 ovs_mutex_unlock(&q->mutex);
2103 fat_rwlock_unlock(&dp->queue_rwlock);
2108 struct dp_netdev_execute_aux {
2109 struct dp_netdev *dp;
2110 const struct flow *key;
2114 dp_execute_cb(void *aux_, struct ofpbuf *packet,
2115 struct pkt_metadata *md,
2116 const struct nlattr *a, bool may_steal)
2117 OVS_NO_THREAD_SAFETY_ANALYSIS
2119 struct dp_netdev_execute_aux *aux = aux_;
2120 int type = nl_attr_type(a);
2121 struct dp_netdev_port *p;
2122 uint32_t *depth = recirc_depth_get();
2124 switch ((enum ovs_action_attr)type) {
2125 case OVS_ACTION_ATTR_OUTPUT:
2126 p = dp_netdev_lookup_port(aux->dp, u32_to_odp(nl_attr_get_u32(a)));
2128 netdev_send(p->netdev, packet, may_steal);
2132 case OVS_ACTION_ATTR_USERSPACE: {
2133 const struct nlattr *userdata;
2135 userdata = nl_attr_find_nested(a, OVS_USERSPACE_ATTR_USERDATA);
2137 dp_netdev_output_userspace(aux->dp, packet,
2138 flow_hash_5tuple(aux->key, 0)
2139 % aux->dp->n_handlers,
2140 DPIF_UC_ACTION, aux->key,
2144 ofpbuf_delete(packet);
2149 case OVS_ACTION_ATTR_RECIRC:
2150 if (*depth < MAX_RECIRC_DEPTH) {
2151 struct pkt_metadata recirc_md = *md;
2152 struct ofpbuf *recirc_packet;
2153 const struct ovs_action_recirc *act;
2155 recirc_packet = may_steal ? packet : ofpbuf_clone(packet);
2157 act = nl_attr_get(a);
2158 recirc_md.recirc_id = act->recirc_id;
2159 recirc_md.dp_hash = 0;
2161 if (act->hash_alg == OVS_RECIRC_HASH_ALG_L4) {
2162 recirc_md.dp_hash = flow_hash_symmetric_l4(aux->key,
2164 if (!recirc_md.dp_hash) {
2165 recirc_md.dp_hash = 1; /* 0 is not valid */
2170 dp_netdev_input(aux->dp, recirc_packet, &recirc_md);
2175 VLOG_WARN("Packet dropped. Max recirculation depth exceeded.");
2179 case OVS_ACTION_ATTR_PUSH_VLAN:
2180 case OVS_ACTION_ATTR_POP_VLAN:
2181 case OVS_ACTION_ATTR_PUSH_MPLS:
2182 case OVS_ACTION_ATTR_POP_MPLS:
2183 case OVS_ACTION_ATTR_SET:
2184 case OVS_ACTION_ATTR_SAMPLE:
2185 case OVS_ACTION_ATTR_UNSPEC:
2186 case __OVS_ACTION_ATTR_MAX:
2192 dp_netdev_execute_actions(struct dp_netdev *dp, const struct flow *key,
2193 struct ofpbuf *packet, bool may_steal,
2194 struct pkt_metadata *md,
2195 const struct nlattr *actions, size_t actions_len)
2197 struct dp_netdev_execute_aux aux = {dp, key};
2199 odp_execute_actions(&aux, packet, may_steal, md,
2200 actions, actions_len, dp_execute_cb);
2203 #define DPIF_NETDEV_CLASS_FUNCTIONS \
2204 dpif_netdev_enumerate, \
2205 dpif_netdev_port_open_type, \
2207 dpif_netdev_close, \
2208 dpif_netdev_destroy, \
2211 dpif_netdev_get_stats, \
2212 dpif_netdev_port_add, \
2213 dpif_netdev_port_del, \
2214 dpif_netdev_port_query_by_number, \
2215 dpif_netdev_port_query_by_name, \
2216 NULL, /* port_get_pid */ \
2217 dpif_netdev_port_dump_start, \
2218 dpif_netdev_port_dump_next, \
2219 dpif_netdev_port_dump_done, \
2220 dpif_netdev_port_poll, \
2221 dpif_netdev_port_poll_wait, \
2222 dpif_netdev_flow_get, \
2223 dpif_netdev_flow_put, \
2224 dpif_netdev_flow_del, \
2225 dpif_netdev_flow_flush, \
2226 dpif_netdev_flow_dump_state_init, \
2227 dpif_netdev_flow_dump_start, \
2228 dpif_netdev_flow_dump_next, \
2230 dpif_netdev_flow_dump_done, \
2231 dpif_netdev_flow_dump_state_uninit, \
2232 dpif_netdev_execute, \
2233 NULL, /* operate */ \
2234 dpif_netdev_recv_set, \
2235 dpif_netdev_handlers_set, \
2236 dpif_netdev_queue_to_priority, \
2238 dpif_netdev_recv_wait, \
2239 dpif_netdev_recv_purge, \
2241 const struct dpif_class dpif_netdev_class = {
2243 DPIF_NETDEV_CLASS_FUNCTIONS
2246 const struct dpif_class dpif_planetlab_class = {
2248 DPIF_NETDEV_CLASS_FUNCTIONS
2252 dpif_dummy_change_port_number(struct unixctl_conn *conn, int argc OVS_UNUSED,
2253 const char *argv[], void *aux OVS_UNUSED)
2255 struct dp_netdev_port *port;
2256 struct dp_netdev *dp;
2259 ovs_mutex_lock(&dp_netdev_mutex);
2260 dp = shash_find_data(&dp_netdevs, argv[1]);
2261 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
2262 ovs_mutex_unlock(&dp_netdev_mutex);
2263 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
2266 ovs_refcount_ref(&dp->ref_cnt);
2267 ovs_mutex_unlock(&dp_netdev_mutex);
2269 ovs_rwlock_wrlock(&dp->port_rwlock);
2270 if (get_port_by_name(dp, argv[2], &port)) {
2271 unixctl_command_reply_error(conn, "unknown port");
2275 port_no = u32_to_odp(atoi(argv[3]));
2276 if (!port_no || port_no == ODPP_NONE) {
2277 unixctl_command_reply_error(conn, "bad port number");
2280 if (dp_netdev_lookup_port(dp, port_no)) {
2281 unixctl_command_reply_error(conn, "port number already in use");
2284 hmap_remove(&dp->ports, &port->node);
2285 port->port_no = port_no;
2286 hmap_insert(&dp->ports, &port->node, hash_int(odp_to_u32(port_no), 0));
2287 seq_change(dp->port_seq);
2288 unixctl_command_reply(conn, NULL);
2291 ovs_rwlock_unlock(&dp->port_rwlock);
2292 dp_netdev_unref(dp);
2296 dpif_dummy_register__(const char *type)
2298 struct dpif_class *class;
2300 class = xmalloc(sizeof *class);
2301 *class = dpif_netdev_class;
2302 class->type = xstrdup(type);
2303 dp_register_provider(class);
2307 dpif_dummy_register(bool override)
2314 dp_enumerate_types(&types);
2315 SSET_FOR_EACH (type, &types) {
2316 if (!dp_unregister_provider(type)) {
2317 dpif_dummy_register__(type);
2320 sset_destroy(&types);
2323 dpif_dummy_register__("dummy");
2325 unixctl_command_register("dpif-dummy/change-port-number",
2326 "DP PORT NEW-NUMBER",
2327 3, 3, dpif_dummy_change_port_number, NULL);