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"
38 #include "dpif-provider.h"
40 #include "dynamic-string.h"
45 #include "meta-flow.h"
47 #include "netdev-dpdk.h"
48 #include "netdev-vport.h"
50 #include "odp-execute.h"
52 #include "ofp-print.h"
55 #include "packet-dpif.h"
57 #include "poll-loop.h"
67 VLOG_DEFINE_THIS_MODULE(dpif_netdev);
69 /* By default, choose a priority in the middle. */
70 #define NETDEV_RULE_PRIORITY 0x8000
73 /* Use per thread recirc_depth to prevent recirculation loop. */
74 #define MAX_RECIRC_DEPTH 5
75 DEFINE_STATIC_PER_THREAD_DATA(uint32_t, recirc_depth, 0)
77 /* Configuration parameters. */
78 enum { MAX_FLOWS = 65536 }; /* Maximum number of flows in flow table. */
81 enum { MAX_QUEUE_LEN = 128 }; /* Maximum number of packets per queue. */
82 enum { QUEUE_MASK = MAX_QUEUE_LEN - 1 };
83 BUILD_ASSERT_DECL(IS_POW2(MAX_QUEUE_LEN));
85 /* Protects against changes to 'dp_netdevs'. */
86 static struct ovs_mutex dp_netdev_mutex = OVS_MUTEX_INITIALIZER;
88 /* Contains all 'struct dp_netdev's. */
89 static struct shash dp_netdevs OVS_GUARDED_BY(dp_netdev_mutex)
90 = SHASH_INITIALIZER(&dp_netdevs);
92 struct dp_netdev_upcall {
93 struct dpif_upcall upcall; /* Queued upcall information. */
94 struct ofpbuf buf; /* ofpbuf instance for upcall.packet. */
97 /* A queue passing packets from a struct dp_netdev to its clients (handlers).
103 * Any access at all requires the owning 'dp_netdev''s queue_rwlock and
105 struct dp_netdev_queue {
106 struct ovs_mutex mutex;
107 struct seq *seq; /* Incremented whenever a packet is queued. */
108 struct dp_netdev_upcall upcalls[MAX_QUEUE_LEN] OVS_GUARDED;
109 unsigned int head OVS_GUARDED;
110 unsigned int tail OVS_GUARDED;
113 /* Datapath based on the network device interface from netdev.h.
119 * Some members, marked 'const', are immutable. Accessing other members
120 * requires synchronization, as noted in more detail below.
122 * Acquisition order is, from outermost to innermost:
124 * dp_netdev_mutex (global)
131 const struct dpif_class *const class;
132 const char *const name;
133 struct ovs_refcount ref_cnt;
134 atomic_flag destroyed;
138 * Readers of 'cls' and 'flow_table' must take a 'cls->rwlock' read lock.
140 * Writers of 'cls' and 'flow_table' must take the 'flow_mutex' and then
141 * the 'cls->rwlock' write lock. (The outer 'flow_mutex' allows writers to
142 * atomically perform multiple operations on 'cls' and 'flow_table'.)
144 struct ovs_mutex flow_mutex;
145 struct classifier cls; /* Classifier. Protected by cls.rwlock. */
146 struct hmap flow_table OVS_GUARDED; /* Flow table. */
150 * 'queue_rwlock' protects the modification of 'handler_queues' and
151 * 'n_handlers'. The queue elements are protected by its
152 * 'handler_queues''s mutex. */
153 struct fat_rwlock queue_rwlock;
154 struct dp_netdev_queue *handler_queues;
159 * ovsthread_stats is internally synchronized. */
160 struct ovsthread_stats stats; /* Contains 'struct dp_netdev_stats *'. */
164 * Protected by RCU. Take the mutex to add or remove ports. */
165 struct ovs_mutex port_mutex;
167 struct seq *port_seq; /* Incremented whenever a port changes. */
169 /* Forwarding threads. */
170 struct latch exit_latch;
171 struct pmd_thread *pmd_threads;
172 size_t n_pmd_threads;
176 static struct dp_netdev_port *dp_netdev_lookup_port(const struct dp_netdev *dp,
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 cmap_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.
242 * Some members, marked 'const', are immutable. Accessing other members
243 * requires synchronization, as noted in more detail below.
245 struct dp_netdev_flow {
246 /* Packet classification. */
247 const struct cls_rule cr; /* In owning dp_netdev's 'cls'. */
249 /* Hash table index by unmasked flow. */
250 const struct hmap_node node; /* In owning dp_netdev's 'flow_table'. */
251 const struct flow flow; /* The flow that created this entry. */
255 * Reading or writing these members requires 'mutex'. */
256 struct ovsthread_stats stats; /* Contains "struct dp_netdev_flow_stats". */
259 OVSRCU_TYPE(struct dp_netdev_actions *) actions;
262 static void dp_netdev_flow_free(struct dp_netdev_flow *);
264 /* Contained by struct dp_netdev_flow's 'stats' member. */
265 struct dp_netdev_flow_stats {
266 struct ovs_mutex mutex; /* Guards all the other members. */
268 long long int used OVS_GUARDED; /* Last used time, in monotonic msecs. */
269 long long int packet_count OVS_GUARDED; /* Number of packets matched. */
270 long long int byte_count OVS_GUARDED; /* Number of bytes matched. */
271 uint16_t tcp_flags OVS_GUARDED; /* Bitwise-OR of seen tcp_flags values. */
274 /* A set of datapath actions within a "struct dp_netdev_flow".
280 * A struct dp_netdev_actions 'actions' is protected with RCU. */
281 struct dp_netdev_actions {
282 /* These members are immutable: they do not change during the struct's
284 struct nlattr *actions; /* Sequence of OVS_ACTION_ATTR_* attributes. */
285 unsigned int size; /* Size of 'actions', in bytes. */
288 struct dp_netdev_actions *dp_netdev_actions_create(const struct nlattr *,
290 struct dp_netdev_actions *dp_netdev_flow_get_actions(
291 const struct dp_netdev_flow *);
292 static void dp_netdev_actions_free(struct dp_netdev_actions *);
294 /* PMD: Poll modes drivers. PMD accesses devices via polling to eliminate
295 * the performance overhead of interrupt processing. Therefore netdev can
296 * not implement rx-wait for these devices. dpif-netdev needs to poll
297 * these device to check for recv buffer. pmd-thread does polling for
298 * devices assigned to itself thread.
300 * DPDK used PMD for accessing NIC.
302 * A thread that receives packets from PMD ports, looks them up in the flow
303 * table, and executes the actions it finds.
306 struct dp_netdev *dp;
309 atomic_uint change_seq;
312 /* Interface to netdev-based datapath. */
315 struct dp_netdev *dp;
316 uint64_t last_port_seq;
319 static int get_port_by_number(struct dp_netdev *dp, odp_port_t port_no,
320 struct dp_netdev_port **portp);
321 static int get_port_by_name(struct dp_netdev *dp, const char *devname,
322 struct dp_netdev_port **portp);
323 static void dp_netdev_free(struct dp_netdev *)
324 OVS_REQUIRES(dp_netdev_mutex);
325 static void dp_netdev_flow_flush(struct dp_netdev *);
326 static int do_add_port(struct dp_netdev *dp, const char *devname,
327 const char *type, odp_port_t port_no)
328 OVS_REQUIRES(dp->port_mutex);
329 static void do_del_port(struct dp_netdev *dp, struct dp_netdev_port *)
330 OVS_REQUIRES(dp->port_mutex);
331 static void dp_netdev_destroy_all_queues(struct dp_netdev *dp)
332 OVS_REQ_WRLOCK(dp->queue_rwlock);
333 static int dpif_netdev_open(const struct dpif_class *, const char *name,
334 bool create, struct dpif **);
335 static int dp_netdev_output_userspace(struct dp_netdev *dp, struct ofpbuf *,
336 int queue_no, int type,
337 const struct miniflow *,
338 const struct nlattr *userdata);
339 static void dp_netdev_execute_actions(struct dp_netdev *dp,
340 const struct miniflow *,
341 struct dpif_packet *, bool may_steal,
342 struct pkt_metadata *,
343 const struct nlattr *actions,
345 static void dp_netdev_port_input(struct dp_netdev *dp,
346 struct dpif_packet *packet,
347 struct pkt_metadata *);
349 static void dp_netdev_set_pmd_threads(struct dp_netdev *, int n);
351 static struct dpif_netdev *
352 dpif_netdev_cast(const struct dpif *dpif)
354 ovs_assert(dpif->dpif_class->open == dpif_netdev_open);
355 return CONTAINER_OF(dpif, struct dpif_netdev, dpif);
358 static struct dp_netdev *
359 get_dp_netdev(const struct dpif *dpif)
361 return dpif_netdev_cast(dpif)->dp;
365 dpif_netdev_enumerate(struct sset *all_dps,
366 const struct dpif_class *dpif_class)
368 struct shash_node *node;
370 ovs_mutex_lock(&dp_netdev_mutex);
371 SHASH_FOR_EACH(node, &dp_netdevs) {
372 struct dp_netdev *dp = node->data;
373 if (dpif_class != dp->class) {
374 /* 'dp_netdevs' contains both "netdev" and "dummy" dpifs.
375 * If the class doesn't match, skip this dpif. */
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_REQUIRES(dp->port_mutex)
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;
465 dp = xzalloc(sizeof *dp);
466 shash_add(&dp_netdevs, name, dp);
468 *CONST_CAST(const struct dpif_class **, &dp->class) = class;
469 *CONST_CAST(const char **, &dp->name) = xstrdup(name);
470 ovs_refcount_init(&dp->ref_cnt);
471 atomic_flag_clear(&dp->destroyed);
473 ovs_mutex_init(&dp->flow_mutex);
474 classifier_init(&dp->cls, NULL);
475 hmap_init(&dp->flow_table);
477 fat_rwlock_init(&dp->queue_rwlock);
479 ovsthread_stats_init(&dp->stats);
481 ovs_mutex_init(&dp->port_mutex);
482 cmap_init(&dp->ports);
483 dp->port_seq = seq_create();
484 latch_init(&dp->exit_latch);
486 ovs_mutex_lock(&dp->port_mutex);
487 error = do_add_port(dp, name, "internal", ODPP_LOCAL);
488 ovs_mutex_unlock(&dp->port_mutex);
499 dpif_netdev_open(const struct dpif_class *class, const char *name,
500 bool create, struct dpif **dpifp)
502 struct dp_netdev *dp;
505 ovs_mutex_lock(&dp_netdev_mutex);
506 dp = shash_find_data(&dp_netdevs, name);
508 error = create ? create_dp_netdev(name, class, &dp) : ENODEV;
510 error = (dp->class != class ? EINVAL
515 *dpifp = create_dpif_netdev(dp);
517 ovs_mutex_unlock(&dp_netdev_mutex);
523 dp_netdev_purge_queues(struct dp_netdev *dp)
524 OVS_REQ_WRLOCK(dp->queue_rwlock)
528 for (i = 0; i < dp->n_handlers; i++) {
529 struct dp_netdev_queue *q = &dp->handler_queues[i];
531 ovs_mutex_lock(&q->mutex);
532 while (q->tail != q->head) {
533 struct dp_netdev_upcall *u = &q->upcalls[q->tail++ & QUEUE_MASK];
534 ofpbuf_uninit(&u->upcall.packet);
535 ofpbuf_uninit(&u->buf);
537 ovs_mutex_unlock(&q->mutex);
541 /* Requires dp_netdev_mutex so that we can't get a new reference to 'dp'
542 * through the 'dp_netdevs' shash while freeing 'dp'. */
544 dp_netdev_free(struct dp_netdev *dp)
545 OVS_REQUIRES(dp_netdev_mutex)
547 struct dp_netdev_port *port;
548 struct dp_netdev_stats *bucket;
551 shash_find_and_delete(&dp_netdevs, dp->name);
553 dp_netdev_set_pmd_threads(dp, 0);
554 free(dp->pmd_threads);
556 dp_netdev_flow_flush(dp);
557 ovs_mutex_lock(&dp->port_mutex);
558 CMAP_FOR_EACH (port, node, &dp->ports) {
559 do_del_port(dp, port);
561 ovs_mutex_unlock(&dp->port_mutex);
563 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
564 ovs_mutex_destroy(&bucket->mutex);
565 free_cacheline(bucket);
567 ovsthread_stats_destroy(&dp->stats);
569 fat_rwlock_wrlock(&dp->queue_rwlock);
570 dp_netdev_destroy_all_queues(dp);
571 fat_rwlock_unlock(&dp->queue_rwlock);
573 fat_rwlock_destroy(&dp->queue_rwlock);
575 classifier_destroy(&dp->cls);
576 hmap_destroy(&dp->flow_table);
577 ovs_mutex_destroy(&dp->flow_mutex);
578 seq_destroy(dp->port_seq);
579 cmap_destroy(&dp->ports);
580 latch_destroy(&dp->exit_latch);
581 free(CONST_CAST(char *, dp->name));
586 dp_netdev_unref(struct dp_netdev *dp)
589 /* Take dp_netdev_mutex so that, if dp->ref_cnt falls to zero, we can't
590 * get a new reference to 'dp' through the 'dp_netdevs' shash. */
591 ovs_mutex_lock(&dp_netdev_mutex);
592 if (ovs_refcount_unref(&dp->ref_cnt) == 1) {
595 ovs_mutex_unlock(&dp_netdev_mutex);
600 dpif_netdev_close(struct dpif *dpif)
602 struct dp_netdev *dp = get_dp_netdev(dpif);
609 dpif_netdev_destroy(struct dpif *dpif)
611 struct dp_netdev *dp = get_dp_netdev(dpif);
613 if (!atomic_flag_test_and_set(&dp->destroyed)) {
614 if (ovs_refcount_unref(&dp->ref_cnt) == 1) {
615 /* Can't happen: 'dpif' still owns a reference to 'dp'. */
624 dpif_netdev_get_stats(const struct dpif *dpif, struct dpif_dp_stats *stats)
626 struct dp_netdev *dp = get_dp_netdev(dpif);
627 struct dp_netdev_stats *bucket;
630 fat_rwlock_rdlock(&dp->cls.rwlock);
631 stats->n_flows = hmap_count(&dp->flow_table);
632 fat_rwlock_unlock(&dp->cls.rwlock);
634 stats->n_hit = stats->n_missed = stats->n_lost = 0;
635 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
636 ovs_mutex_lock(&bucket->mutex);
637 stats->n_hit += bucket->n[DP_STAT_HIT];
638 stats->n_missed += bucket->n[DP_STAT_MISS];
639 stats->n_lost += bucket->n[DP_STAT_LOST];
640 ovs_mutex_unlock(&bucket->mutex);
642 stats->n_masks = UINT32_MAX;
643 stats->n_mask_hit = UINT64_MAX;
649 dp_netdev_reload_pmd_threads(struct dp_netdev *dp)
653 for (i = 0; i < dp->n_pmd_threads; i++) {
654 struct pmd_thread *f = &dp->pmd_threads[i];
657 atomic_add(&f->change_seq, 1, &id);
662 hash_port_no(odp_port_t port_no)
664 return hash_int(odp_to_u32(port_no), 0);
668 do_add_port(struct dp_netdev *dp, const char *devname, const char *type,
670 OVS_REQUIRES(dp->port_mutex)
672 struct netdev_saved_flags *sf;
673 struct dp_netdev_port *port;
674 struct netdev *netdev;
675 enum netdev_flags flags;
676 const char *open_type;
680 /* XXX reject devices already in some dp_netdev. */
682 /* Open and validate network device. */
683 open_type = dpif_netdev_port_open_type(dp->class, type);
684 error = netdev_open(devname, open_type, &netdev);
688 /* XXX reject non-Ethernet devices */
690 netdev_get_flags(netdev, &flags);
691 if (flags & NETDEV_LOOPBACK) {
692 VLOG_ERR("%s: cannot add a loopback device", devname);
693 netdev_close(netdev);
697 port = xzalloc(sizeof *port);
698 port->port_no = port_no;
699 port->netdev = netdev;
700 port->rxq = xmalloc(sizeof *port->rxq * netdev_n_rxq(netdev));
701 port->type = xstrdup(type);
702 for (i = 0; i < netdev_n_rxq(netdev); i++) {
703 error = netdev_rxq_open(netdev, &port->rxq[i], i);
705 && !(error == EOPNOTSUPP && dpif_netdev_class_is_dummy(dp->class))) {
706 VLOG_ERR("%s: cannot receive packets on this network device (%s)",
707 devname, ovs_strerror(errno));
708 netdev_close(netdev);
713 error = netdev_turn_flags_on(netdev, NETDEV_PROMISC, &sf);
715 for (i = 0; i < netdev_n_rxq(netdev); i++) {
716 netdev_rxq_close(port->rxq[i]);
718 netdev_close(netdev);
725 if (netdev_is_pmd(netdev)) {
727 dp_netdev_set_pmd_threads(dp, NR_THREADS);
728 dp_netdev_reload_pmd_threads(dp);
730 ovs_refcount_init(&port->ref_cnt);
732 cmap_insert(&dp->ports, &port->node, hash_port_no(port_no));
733 seq_change(dp->port_seq);
739 dpif_netdev_port_add(struct dpif *dpif, struct netdev *netdev,
740 odp_port_t *port_nop)
742 struct dp_netdev *dp = get_dp_netdev(dpif);
743 char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
744 const char *dpif_port;
748 ovs_mutex_lock(&dp->port_mutex);
749 dpif_port = netdev_vport_get_dpif_port(netdev, namebuf, sizeof namebuf);
750 if (*port_nop != ODPP_NONE) {
752 error = dp_netdev_lookup_port(dp, *port_nop) ? EBUSY : 0;
754 port_no = choose_port(dp, dpif_port);
755 error = port_no == ODPP_NONE ? EFBIG : 0;
759 error = do_add_port(dp, dpif_port, netdev_get_type(netdev), port_no);
761 ovs_mutex_unlock(&dp->port_mutex);
767 dpif_netdev_port_del(struct dpif *dpif, odp_port_t port_no)
769 struct dp_netdev *dp = get_dp_netdev(dpif);
772 ovs_mutex_lock(&dp->port_mutex);
773 if (port_no == ODPP_LOCAL) {
776 struct dp_netdev_port *port;
778 error = get_port_by_number(dp, port_no, &port);
780 do_del_port(dp, port);
783 ovs_mutex_unlock(&dp->port_mutex);
789 is_valid_port_number(odp_port_t port_no)
791 return port_no != ODPP_NONE;
794 static struct dp_netdev_port *
795 dp_netdev_lookup_port(const struct dp_netdev *dp, odp_port_t port_no)
797 struct dp_netdev_port *port;
799 CMAP_FOR_EACH_WITH_HASH (port, node, hash_port_no(port_no), &dp->ports) {
800 if (port->port_no == port_no) {
808 get_port_by_number(struct dp_netdev *dp,
809 odp_port_t port_no, struct dp_netdev_port **portp)
811 if (!is_valid_port_number(port_no)) {
815 *portp = dp_netdev_lookup_port(dp, port_no);
816 return *portp ? 0 : ENOENT;
821 port_ref(struct dp_netdev_port *port)
824 ovs_refcount_ref(&port->ref_cnt);
829 port_destroy__(struct dp_netdev_port *port)
831 int n_rxq = netdev_n_rxq(port->netdev);
834 netdev_close(port->netdev);
835 netdev_restore_flags(port->sf);
837 for (i = 0; i < n_rxq; i++) {
838 netdev_rxq_close(port->rxq[i]);
846 port_unref(struct dp_netdev_port *port)
848 if (port && ovs_refcount_unref(&port->ref_cnt) == 1) {
849 ovsrcu_postpone(port_destroy__, port);
854 get_port_by_name(struct dp_netdev *dp,
855 const char *devname, struct dp_netdev_port **portp)
856 OVS_REQUIRES(dp->port_mutex)
858 struct dp_netdev_port *port;
860 CMAP_FOR_EACH (port, node, &dp->ports) {
861 if (!strcmp(netdev_get_name(port->netdev), devname)) {
870 do_del_port(struct dp_netdev *dp, struct dp_netdev_port *port)
871 OVS_REQUIRES(dp->port_mutex)
873 cmap_remove(&dp->ports, &port->node, hash_odp_port(port->port_no));
874 seq_change(dp->port_seq);
875 if (netdev_is_pmd(port->netdev)) {
876 dp_netdev_reload_pmd_threads(dp);
883 answer_port_query(const struct dp_netdev_port *port,
884 struct dpif_port *dpif_port)
886 dpif_port->name = xstrdup(netdev_get_name(port->netdev));
887 dpif_port->type = xstrdup(port->type);
888 dpif_port->port_no = port->port_no;
892 dpif_netdev_port_query_by_number(const struct dpif *dpif, odp_port_t port_no,
893 struct dpif_port *dpif_port)
895 struct dp_netdev *dp = get_dp_netdev(dpif);
896 struct dp_netdev_port *port;
899 error = get_port_by_number(dp, port_no, &port);
900 if (!error && dpif_port) {
901 answer_port_query(port, dpif_port);
908 dpif_netdev_port_query_by_name(const struct dpif *dpif, const char *devname,
909 struct dpif_port *dpif_port)
911 struct dp_netdev *dp = get_dp_netdev(dpif);
912 struct dp_netdev_port *port;
915 ovs_mutex_lock(&dp->port_mutex);
916 error = get_port_by_name(dp, devname, &port);
917 if (!error && dpif_port) {
918 answer_port_query(port, dpif_port);
920 ovs_mutex_unlock(&dp->port_mutex);
926 dp_netdev_flow_free(struct dp_netdev_flow *flow)
928 struct dp_netdev_flow_stats *bucket;
931 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &flow->stats) {
932 ovs_mutex_destroy(&bucket->mutex);
933 free_cacheline(bucket);
935 ovsthread_stats_destroy(&flow->stats);
937 cls_rule_destroy(CONST_CAST(struct cls_rule *, &flow->cr));
938 dp_netdev_actions_free(dp_netdev_flow_get_actions(flow));
943 dp_netdev_remove_flow(struct dp_netdev *dp, struct dp_netdev_flow *flow)
944 OVS_REQ_WRLOCK(dp->cls.rwlock)
945 OVS_REQUIRES(dp->flow_mutex)
947 struct cls_rule *cr = CONST_CAST(struct cls_rule *, &flow->cr);
948 struct hmap_node *node = CONST_CAST(struct hmap_node *, &flow->node);
950 classifier_remove(&dp->cls, cr);
951 hmap_remove(&dp->flow_table, node);
952 ovsrcu_postpone(dp_netdev_flow_free, flow);
956 dp_netdev_flow_flush(struct dp_netdev *dp)
958 struct dp_netdev_flow *netdev_flow, *next;
960 ovs_mutex_lock(&dp->flow_mutex);
961 fat_rwlock_wrlock(&dp->cls.rwlock);
962 HMAP_FOR_EACH_SAFE (netdev_flow, next, node, &dp->flow_table) {
963 dp_netdev_remove_flow(dp, netdev_flow);
965 fat_rwlock_unlock(&dp->cls.rwlock);
966 ovs_mutex_unlock(&dp->flow_mutex);
970 dpif_netdev_flow_flush(struct dpif *dpif)
972 struct dp_netdev *dp = get_dp_netdev(dpif);
974 dp_netdev_flow_flush(dp);
978 struct dp_netdev_port_state {
979 struct cmap_position position;
984 dpif_netdev_port_dump_start(const struct dpif *dpif OVS_UNUSED, void **statep)
986 *statep = xzalloc(sizeof(struct dp_netdev_port_state));
991 dpif_netdev_port_dump_next(const struct dpif *dpif, void *state_,
992 struct dpif_port *dpif_port)
994 struct dp_netdev_port_state *state = state_;
995 struct dp_netdev *dp = get_dp_netdev(dpif);
996 struct cmap_node *node;
999 node = cmap_next_position(&dp->ports, &state->position);
1001 struct dp_netdev_port *port;
1003 port = CONTAINER_OF(node, struct dp_netdev_port, node);
1006 state->name = xstrdup(netdev_get_name(port->netdev));
1007 dpif_port->name = state->name;
1008 dpif_port->type = port->type;
1009 dpif_port->port_no = port->port_no;
1020 dpif_netdev_port_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
1022 struct dp_netdev_port_state *state = state_;
1029 dpif_netdev_port_poll(const struct dpif *dpif_, char **devnamep OVS_UNUSED)
1031 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
1032 uint64_t new_port_seq;
1035 new_port_seq = seq_read(dpif->dp->port_seq);
1036 if (dpif->last_port_seq != new_port_seq) {
1037 dpif->last_port_seq = new_port_seq;
1047 dpif_netdev_port_poll_wait(const struct dpif *dpif_)
1049 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
1051 seq_wait(dpif->dp->port_seq, dpif->last_port_seq);
1054 static struct dp_netdev_flow *
1055 dp_netdev_flow_cast(const struct cls_rule *cr)
1057 return cr ? CONTAINER_OF(cr, struct dp_netdev_flow, cr) : NULL;
1060 static struct dp_netdev_flow *
1061 dp_netdev_lookup_flow(const struct dp_netdev *dp, const struct miniflow *key)
1062 OVS_EXCLUDED(dp->cls.rwlock)
1064 struct dp_netdev_flow *netdev_flow;
1065 struct cls_rule *rule;
1067 fat_rwlock_rdlock(&dp->cls.rwlock);
1068 rule = classifier_lookup_miniflow_first(&dp->cls, key);
1069 netdev_flow = dp_netdev_flow_cast(rule);
1070 fat_rwlock_unlock(&dp->cls.rwlock);
1075 static struct dp_netdev_flow *
1076 dp_netdev_find_flow(const struct dp_netdev *dp, const struct flow *flow)
1077 OVS_REQ_RDLOCK(dp->cls.rwlock)
1079 struct dp_netdev_flow *netdev_flow;
1081 HMAP_FOR_EACH_WITH_HASH (netdev_flow, node, flow_hash(flow, 0),
1083 if (flow_equal(&netdev_flow->flow, flow)) {
1092 get_dpif_flow_stats(struct dp_netdev_flow *netdev_flow,
1093 struct dpif_flow_stats *stats)
1095 struct dp_netdev_flow_stats *bucket;
1098 memset(stats, 0, sizeof *stats);
1099 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
1100 ovs_mutex_lock(&bucket->mutex);
1101 stats->n_packets += bucket->packet_count;
1102 stats->n_bytes += bucket->byte_count;
1103 stats->used = MAX(stats->used, bucket->used);
1104 stats->tcp_flags |= bucket->tcp_flags;
1105 ovs_mutex_unlock(&bucket->mutex);
1110 dpif_netdev_mask_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1111 const struct nlattr *mask_key,
1112 uint32_t mask_key_len, const struct flow *flow,
1116 enum odp_key_fitness fitness;
1118 fitness = odp_flow_key_to_mask(mask_key, mask_key_len, mask, flow);
1120 /* This should not happen: it indicates that
1121 * odp_flow_key_from_mask() and odp_flow_key_to_mask()
1122 * disagree on the acceptable form of a mask. Log the problem
1123 * as an error, with enough details to enable debugging. */
1124 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1126 if (!VLOG_DROP_ERR(&rl)) {
1130 odp_flow_format(key, key_len, mask_key, mask_key_len, NULL, &s,
1132 VLOG_ERR("internal error parsing flow mask %s (%s)",
1133 ds_cstr(&s), odp_key_fitness_to_string(fitness));
1140 enum mf_field_id id;
1141 /* No mask key, unwildcard everything except fields whose
1142 * prerequisities are not met. */
1143 memset(mask, 0x0, sizeof *mask);
1145 for (id = 0; id < MFF_N_IDS; ++id) {
1146 /* Skip registers and metadata. */
1147 if (!(id >= MFF_REG0 && id < MFF_REG0 + FLOW_N_REGS)
1148 && id != MFF_METADATA) {
1149 const struct mf_field *mf = mf_from_id(id);
1150 if (mf_are_prereqs_ok(mf, flow)) {
1151 mf_mask_field(mf, mask);
1157 /* Force unwildcard the in_port.
1159 * We need to do this even in the case where we unwildcard "everything"
1160 * above because "everything" only includes the 16-bit OpenFlow port number
1161 * mask->in_port.ofp_port, which only covers half of the 32-bit datapath
1162 * port number mask->in_port.odp_port. */
1163 mask->in_port.odp_port = u32_to_odp(UINT32_MAX);
1169 dpif_netdev_flow_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1174 if (odp_flow_key_to_flow(key, key_len, flow)) {
1175 /* This should not happen: it indicates that odp_flow_key_from_flow()
1176 * and odp_flow_key_to_flow() disagree on the acceptable form of a
1177 * flow. Log the problem as an error, with enough details to enable
1179 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1181 if (!VLOG_DROP_ERR(&rl)) {
1185 odp_flow_format(key, key_len, NULL, 0, NULL, &s, true);
1186 VLOG_ERR("internal error parsing flow key %s", ds_cstr(&s));
1193 in_port = flow->in_port.odp_port;
1194 if (!is_valid_port_number(in_port) && in_port != ODPP_NONE) {
1202 dpif_netdev_flow_get(const struct dpif *dpif,
1203 const struct nlattr *nl_key, size_t nl_key_len,
1204 struct ofpbuf **actionsp, struct dpif_flow_stats *stats)
1206 struct dp_netdev *dp = get_dp_netdev(dpif);
1207 struct dp_netdev_flow *netdev_flow;
1211 error = dpif_netdev_flow_from_nlattrs(nl_key, nl_key_len, &key);
1216 fat_rwlock_rdlock(&dp->cls.rwlock);
1217 netdev_flow = dp_netdev_find_flow(dp, &key);
1218 fat_rwlock_unlock(&dp->cls.rwlock);
1222 get_dpif_flow_stats(netdev_flow, stats);
1226 struct dp_netdev_actions *actions;
1228 actions = dp_netdev_flow_get_actions(netdev_flow);
1229 *actionsp = ofpbuf_clone_data(actions->actions, actions->size);
1239 dp_netdev_flow_add(struct dp_netdev *dp, const struct flow *flow,
1240 const struct flow_wildcards *wc,
1241 const struct nlattr *actions,
1243 OVS_REQUIRES(dp->flow_mutex)
1245 struct dp_netdev_flow *netdev_flow;
1248 netdev_flow = xzalloc(sizeof *netdev_flow);
1249 *CONST_CAST(struct flow *, &netdev_flow->flow) = *flow;
1251 ovsthread_stats_init(&netdev_flow->stats);
1253 ovsrcu_set(&netdev_flow->actions,
1254 dp_netdev_actions_create(actions, actions_len));
1256 match_init(&match, flow, wc);
1257 cls_rule_init(CONST_CAST(struct cls_rule *, &netdev_flow->cr),
1258 &match, NETDEV_RULE_PRIORITY);
1259 fat_rwlock_wrlock(&dp->cls.rwlock);
1260 classifier_insert(&dp->cls,
1261 CONST_CAST(struct cls_rule *, &netdev_flow->cr));
1262 hmap_insert(&dp->flow_table,
1263 CONST_CAST(struct hmap_node *, &netdev_flow->node),
1264 flow_hash(flow, 0));
1265 fat_rwlock_unlock(&dp->cls.rwlock);
1271 clear_stats(struct dp_netdev_flow *netdev_flow)
1273 struct dp_netdev_flow_stats *bucket;
1276 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
1277 ovs_mutex_lock(&bucket->mutex);
1279 bucket->packet_count = 0;
1280 bucket->byte_count = 0;
1281 bucket->tcp_flags = 0;
1282 ovs_mutex_unlock(&bucket->mutex);
1287 dpif_netdev_flow_put(struct dpif *dpif, const struct dpif_flow_put *put)
1289 struct dp_netdev *dp = get_dp_netdev(dpif);
1290 struct dp_netdev_flow *netdev_flow;
1292 struct miniflow miniflow;
1293 struct flow_wildcards wc;
1296 error = dpif_netdev_flow_from_nlattrs(put->key, put->key_len, &flow);
1300 error = dpif_netdev_mask_from_nlattrs(put->key, put->key_len,
1301 put->mask, put->mask_len,
1306 miniflow_init(&miniflow, &flow);
1308 ovs_mutex_lock(&dp->flow_mutex);
1309 netdev_flow = dp_netdev_lookup_flow(dp, &miniflow);
1311 if (put->flags & DPIF_FP_CREATE) {
1312 if (hmap_count(&dp->flow_table) < MAX_FLOWS) {
1314 memset(put->stats, 0, sizeof *put->stats);
1316 error = dp_netdev_flow_add(dp, &flow, &wc, put->actions,
1325 if (put->flags & DPIF_FP_MODIFY
1326 && flow_equal(&flow, &netdev_flow->flow)) {
1327 struct dp_netdev_actions *new_actions;
1328 struct dp_netdev_actions *old_actions;
1330 new_actions = dp_netdev_actions_create(put->actions,
1333 old_actions = dp_netdev_flow_get_actions(netdev_flow);
1334 ovsrcu_set(&netdev_flow->actions, new_actions);
1337 get_dpif_flow_stats(netdev_flow, put->stats);
1339 if (put->flags & DPIF_FP_ZERO_STATS) {
1340 clear_stats(netdev_flow);
1343 ovsrcu_postpone(dp_netdev_actions_free, old_actions);
1344 } else if (put->flags & DPIF_FP_CREATE) {
1347 /* Overlapping flow. */
1351 ovs_mutex_unlock(&dp->flow_mutex);
1357 dpif_netdev_flow_del(struct dpif *dpif, const struct dpif_flow_del *del)
1359 struct dp_netdev *dp = get_dp_netdev(dpif);
1360 struct dp_netdev_flow *netdev_flow;
1364 error = dpif_netdev_flow_from_nlattrs(del->key, del->key_len, &key);
1369 ovs_mutex_lock(&dp->flow_mutex);
1370 fat_rwlock_wrlock(&dp->cls.rwlock);
1371 netdev_flow = dp_netdev_find_flow(dp, &key);
1374 get_dpif_flow_stats(netdev_flow, del->stats);
1376 dp_netdev_remove_flow(dp, netdev_flow);
1380 fat_rwlock_unlock(&dp->cls.rwlock);
1381 ovs_mutex_unlock(&dp->flow_mutex);
1386 struct dpif_netdev_flow_dump {
1387 struct dpif_flow_dump up;
1391 struct ovs_mutex mutex;
1394 static struct dpif_netdev_flow_dump *
1395 dpif_netdev_flow_dump_cast(struct dpif_flow_dump *dump)
1397 return CONTAINER_OF(dump, struct dpif_netdev_flow_dump, up);
1400 static struct dpif_flow_dump *
1401 dpif_netdev_flow_dump_create(const struct dpif *dpif_)
1403 struct dpif_netdev_flow_dump *dump;
1405 dump = xmalloc(sizeof *dump);
1406 dpif_flow_dump_init(&dump->up, dpif_);
1410 ovs_mutex_init(&dump->mutex);
1416 dpif_netdev_flow_dump_destroy(struct dpif_flow_dump *dump_)
1418 struct dpif_netdev_flow_dump *dump = dpif_netdev_flow_dump_cast(dump_);
1420 ovs_mutex_destroy(&dump->mutex);
1425 struct dpif_netdev_flow_dump_thread {
1426 struct dpif_flow_dump_thread up;
1427 struct dpif_netdev_flow_dump *dump;
1428 struct odputil_keybuf keybuf;
1429 struct odputil_keybuf maskbuf;
1432 static struct dpif_netdev_flow_dump_thread *
1433 dpif_netdev_flow_dump_thread_cast(struct dpif_flow_dump_thread *thread)
1435 return CONTAINER_OF(thread, struct dpif_netdev_flow_dump_thread, up);
1438 static struct dpif_flow_dump_thread *
1439 dpif_netdev_flow_dump_thread_create(struct dpif_flow_dump *dump_)
1441 struct dpif_netdev_flow_dump *dump = dpif_netdev_flow_dump_cast(dump_);
1442 struct dpif_netdev_flow_dump_thread *thread;
1444 thread = xmalloc(sizeof *thread);
1445 dpif_flow_dump_thread_init(&thread->up, &dump->up);
1446 thread->dump = dump;
1451 dpif_netdev_flow_dump_thread_destroy(struct dpif_flow_dump_thread *thread_)
1453 struct dpif_netdev_flow_dump_thread *thread
1454 = dpif_netdev_flow_dump_thread_cast(thread_);
1459 /* XXX the caller must use 'actions' without quiescing */
1461 dpif_netdev_flow_dump_next(struct dpif_flow_dump_thread *thread_,
1462 struct dpif_flow *f, int max_flows OVS_UNUSED)
1464 struct dpif_netdev_flow_dump_thread *thread
1465 = dpif_netdev_flow_dump_thread_cast(thread_);
1466 struct dpif_netdev_flow_dump *dump = thread->dump;
1467 struct dpif_netdev *dpif = dpif_netdev_cast(thread->up.dpif);
1468 struct dp_netdev *dp = get_dp_netdev(&dpif->dpif);
1469 struct dp_netdev_flow *netdev_flow;
1470 struct flow_wildcards wc;
1471 struct dp_netdev_actions *dp_actions;
1475 ovs_mutex_lock(&dump->mutex);
1476 error = dump->status;
1478 struct hmap_node *node;
1480 fat_rwlock_rdlock(&dp->cls.rwlock);
1481 node = hmap_at_position(&dp->flow_table, &dump->bucket, &dump->offset);
1483 netdev_flow = CONTAINER_OF(node, struct dp_netdev_flow, node);
1485 fat_rwlock_unlock(&dp->cls.rwlock);
1487 dump->status = error = EOF;
1490 ovs_mutex_unlock(&dump->mutex);
1495 minimask_expand(&netdev_flow->cr.match.mask, &wc);
1498 ofpbuf_use_stack(&buf, &thread->keybuf, sizeof thread->keybuf);
1499 odp_flow_key_from_flow(&buf, &netdev_flow->flow, &wc.masks,
1500 netdev_flow->flow.in_port.odp_port, true);
1501 f->key = ofpbuf_data(&buf);
1502 f->key_len = ofpbuf_size(&buf);
1505 ofpbuf_use_stack(&buf, &thread->maskbuf, sizeof thread->maskbuf);
1506 odp_flow_key_from_mask(&buf, &wc.masks, &netdev_flow->flow,
1507 odp_to_u32(wc.masks.in_port.odp_port),
1509 f->mask = ofpbuf_data(&buf);
1510 f->mask_len = ofpbuf_size(&buf);
1513 dp_actions = dp_netdev_flow_get_actions(netdev_flow);
1514 f->actions = dp_actions->actions;
1515 f->actions_len = dp_actions->size;
1518 get_dpif_flow_stats(netdev_flow, &f->stats);
1524 dpif_netdev_execute(struct dpif *dpif, struct dpif_execute *execute)
1526 struct dp_netdev *dp = get_dp_netdev(dpif);
1527 struct dpif_packet packet;
1528 struct pkt_metadata *md = &execute->md;
1530 struct miniflow flow;
1531 uint32_t buf[FLOW_U32S];
1534 if (ofpbuf_size(execute->packet) < ETH_HEADER_LEN ||
1535 ofpbuf_size(execute->packet) > UINT16_MAX) {
1539 /* Extract flow key. */
1540 miniflow_initialize(&key.flow, key.buf);
1541 miniflow_extract(execute->packet, md, &key.flow);
1543 packet.ofpbuf = *execute->packet;
1545 dp_netdev_execute_actions(dp, &key.flow, &packet, false, md,
1546 execute->actions, execute->actions_len);
1548 /* Even though may_steal is set to false, some actions could modify or
1549 * reallocate the ofpbuf memory. We need to pass those changes to the
1551 *execute->packet = packet.ofpbuf;
1557 dp_netdev_destroy_all_queues(struct dp_netdev *dp)
1558 OVS_REQ_WRLOCK(dp->queue_rwlock)
1562 dp_netdev_purge_queues(dp);
1564 for (i = 0; i < dp->n_handlers; i++) {
1565 struct dp_netdev_queue *q = &dp->handler_queues[i];
1567 ovs_mutex_destroy(&q->mutex);
1568 seq_destroy(q->seq);
1570 free(dp->handler_queues);
1571 dp->handler_queues = NULL;
1576 dp_netdev_refresh_queues(struct dp_netdev *dp, uint32_t n_handlers)
1577 OVS_REQ_WRLOCK(dp->queue_rwlock)
1579 if (dp->n_handlers != n_handlers) {
1582 dp_netdev_destroy_all_queues(dp);
1584 dp->n_handlers = n_handlers;
1585 dp->handler_queues = xzalloc(n_handlers * sizeof *dp->handler_queues);
1587 for (i = 0; i < n_handlers; i++) {
1588 struct dp_netdev_queue *q = &dp->handler_queues[i];
1590 ovs_mutex_init(&q->mutex);
1591 q->seq = seq_create();
1597 dpif_netdev_recv_set(struct dpif *dpif, bool enable)
1599 struct dp_netdev *dp = get_dp_netdev(dpif);
1601 if ((dp->handler_queues != NULL) == enable) {
1605 fat_rwlock_wrlock(&dp->queue_rwlock);
1607 dp_netdev_destroy_all_queues(dp);
1609 dp_netdev_refresh_queues(dp, 1);
1611 fat_rwlock_unlock(&dp->queue_rwlock);
1617 dpif_netdev_handlers_set(struct dpif *dpif, uint32_t n_handlers)
1619 struct dp_netdev *dp = get_dp_netdev(dpif);
1621 fat_rwlock_wrlock(&dp->queue_rwlock);
1622 if (dp->handler_queues) {
1623 dp_netdev_refresh_queues(dp, n_handlers);
1625 fat_rwlock_unlock(&dp->queue_rwlock);
1631 dpif_netdev_queue_to_priority(const struct dpif *dpif OVS_UNUSED,
1632 uint32_t queue_id, uint32_t *priority)
1634 *priority = queue_id;
1639 dp_netdev_recv_check(const struct dp_netdev *dp, const uint32_t handler_id)
1640 OVS_REQ_RDLOCK(dp->queue_rwlock)
1642 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1644 if (!dp->handler_queues) {
1645 VLOG_WARN_RL(&rl, "receiving upcall disabled");
1649 if (handler_id >= dp->n_handlers) {
1650 VLOG_WARN_RL(&rl, "handler index out of bound");
1658 dpif_netdev_recv(struct dpif *dpif, uint32_t handler_id,
1659 struct dpif_upcall *upcall, struct ofpbuf *buf)
1661 struct dp_netdev *dp = get_dp_netdev(dpif);
1662 struct dp_netdev_queue *q;
1665 fat_rwlock_rdlock(&dp->queue_rwlock);
1667 if (!dp_netdev_recv_check(dp, handler_id)) {
1672 q = &dp->handler_queues[handler_id];
1673 ovs_mutex_lock(&q->mutex);
1674 if (q->head != q->tail) {
1675 struct dp_netdev_upcall *u = &q->upcalls[q->tail++ & QUEUE_MASK];
1677 *upcall = u->upcall;
1684 ovs_mutex_unlock(&q->mutex);
1687 fat_rwlock_unlock(&dp->queue_rwlock);
1693 dpif_netdev_recv_wait(struct dpif *dpif, uint32_t handler_id)
1695 struct dp_netdev *dp = get_dp_netdev(dpif);
1696 struct dp_netdev_queue *q;
1699 fat_rwlock_rdlock(&dp->queue_rwlock);
1701 if (!dp_netdev_recv_check(dp, handler_id)) {
1705 q = &dp->handler_queues[handler_id];
1706 ovs_mutex_lock(&q->mutex);
1707 seq = seq_read(q->seq);
1708 if (q->head != q->tail) {
1709 poll_immediate_wake();
1711 seq_wait(q->seq, seq);
1714 ovs_mutex_unlock(&q->mutex);
1717 fat_rwlock_unlock(&dp->queue_rwlock);
1721 dpif_netdev_recv_purge(struct dpif *dpif)
1723 struct dpif_netdev *dpif_netdev = dpif_netdev_cast(dpif);
1725 fat_rwlock_wrlock(&dpif_netdev->dp->queue_rwlock);
1726 dp_netdev_purge_queues(dpif_netdev->dp);
1727 fat_rwlock_unlock(&dpif_netdev->dp->queue_rwlock);
1730 /* Creates and returns a new 'struct dp_netdev_actions', with a reference count
1731 * of 1, whose actions are a copy of from the 'ofpacts_len' bytes of
1733 struct dp_netdev_actions *
1734 dp_netdev_actions_create(const struct nlattr *actions, size_t size)
1736 struct dp_netdev_actions *netdev_actions;
1738 netdev_actions = xmalloc(sizeof *netdev_actions);
1739 netdev_actions->actions = xmemdup(actions, size);
1740 netdev_actions->size = size;
1742 return netdev_actions;
1745 struct dp_netdev_actions *
1746 dp_netdev_flow_get_actions(const struct dp_netdev_flow *flow)
1748 return ovsrcu_get(struct dp_netdev_actions *, &flow->actions);
1752 dp_netdev_actions_free(struct dp_netdev_actions *actions)
1754 free(actions->actions);
1760 dp_netdev_process_rxq_port(struct dp_netdev *dp,
1761 struct dp_netdev_port *port,
1762 struct netdev_rxq *rxq)
1764 struct dpif_packet *packet[NETDEV_MAX_RX_BATCH];
1767 error = netdev_rxq_recv(rxq, packet, &c);
1769 struct pkt_metadata md = PKT_METADATA_INITIALIZER(port->port_no);
1772 for (i = 0; i < c; i++) {
1773 dp_netdev_port_input(dp, packet[i], &md);
1775 } else if (error != EAGAIN && error != EOPNOTSUPP) {
1776 static struct vlog_rate_limit rl
1777 = VLOG_RATE_LIMIT_INIT(1, 5);
1779 VLOG_ERR_RL(&rl, "error receiving data from %s: %s",
1780 netdev_get_name(port->netdev),
1781 ovs_strerror(error));
1786 dpif_netdev_run(struct dpif *dpif)
1788 struct dp_netdev_port *port;
1789 struct dp_netdev *dp = get_dp_netdev(dpif);
1791 CMAP_FOR_EACH (port, node, &dp->ports) {
1792 if (!netdev_is_pmd(port->netdev)) {
1795 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
1796 dp_netdev_process_rxq_port(dp, port, port->rxq[i]);
1803 dpif_netdev_wait(struct dpif *dpif)
1805 struct dp_netdev_port *port;
1806 struct dp_netdev *dp = get_dp_netdev(dpif);
1808 ovs_mutex_lock(&dp_netdev_mutex);
1809 CMAP_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_mutex_unlock(&dp_netdev_mutex);
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 for (i = 0; i < poll_cnt; i++) {
1839 port_unref(poll_list[i].port);
1845 CMAP_FOR_EACH (port, node, &f->dp->ports) {
1846 if (netdev_is_pmd(port->netdev)) {
1849 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
1850 if ((index % dp->n_pmd_threads) == id) {
1851 poll_list = xrealloc(poll_list, sizeof *poll_list * (poll_cnt + 1));
1854 poll_list[poll_cnt].port = port;
1855 poll_list[poll_cnt].rx = port->rxq[i];
1863 *ppoll_list = poll_list;
1868 pmd_thread_main(void *f_)
1870 struct pmd_thread *f = f_;
1871 struct dp_netdev *dp = f->dp;
1872 unsigned int lc = 0;
1873 struct rxq_poll *poll_list;
1874 unsigned int port_seq;
1881 pmd_thread_setaffinity_cpu(f->id);
1883 poll_cnt = pmd_load_queues(f, &poll_list, poll_cnt);
1884 atomic_read(&f->change_seq, &port_seq);
1887 unsigned int c_port_seq;
1890 for (i = 0; i < poll_cnt; i++) {
1891 dp_netdev_process_rxq_port(dp, poll_list[i].port, poll_list[i].rx);
1897 /* TODO: need completely userspace based signaling method.
1898 * to keep this thread entirely in userspace.
1899 * For now using atomic counter. */
1901 atomic_read_explicit(&f->change_seq, &c_port_seq, memory_order_consume);
1902 if (c_port_seq != port_seq) {
1908 if (!latch_is_set(&f->dp->exit_latch)){
1912 for (i = 0; i < poll_cnt; i++) {
1913 port_unref(poll_list[i].port);
1921 dp_netdev_set_pmd_threads(struct dp_netdev *dp, int n)
1925 if (n == dp->n_pmd_threads) {
1929 /* Stop existing threads. */
1930 latch_set(&dp->exit_latch);
1931 dp_netdev_reload_pmd_threads(dp);
1932 for (i = 0; i < dp->n_pmd_threads; i++) {
1933 struct pmd_thread *f = &dp->pmd_threads[i];
1935 xpthread_join(f->thread, NULL);
1937 latch_poll(&dp->exit_latch);
1938 free(dp->pmd_threads);
1940 /* Start new threads. */
1941 dp->pmd_threads = xmalloc(n * sizeof *dp->pmd_threads);
1942 dp->n_pmd_threads = n;
1944 for (i = 0; i < n; i++) {
1945 struct pmd_thread *f = &dp->pmd_threads[i];
1949 atomic_store(&f->change_seq, 1);
1951 /* Each thread will distribute all devices rx-queues among
1953 f->thread = ovs_thread_create("pmd", pmd_thread_main, f);
1959 dp_netdev_flow_stats_new_cb(void)
1961 struct dp_netdev_flow_stats *bucket = xzalloc_cacheline(sizeof *bucket);
1962 ovs_mutex_init(&bucket->mutex);
1967 dp_netdev_flow_used(struct dp_netdev_flow *netdev_flow,
1968 const struct ofpbuf *packet,
1969 const struct miniflow *key)
1971 uint16_t tcp_flags = miniflow_get_tcp_flags(key);
1972 long long int now = time_msec();
1973 struct dp_netdev_flow_stats *bucket;
1975 bucket = ovsthread_stats_bucket_get(&netdev_flow->stats,
1976 dp_netdev_flow_stats_new_cb);
1978 ovs_mutex_lock(&bucket->mutex);
1979 bucket->used = MAX(now, bucket->used);
1980 bucket->packet_count++;
1981 bucket->byte_count += ofpbuf_size(packet);
1982 bucket->tcp_flags |= tcp_flags;
1983 ovs_mutex_unlock(&bucket->mutex);
1987 dp_netdev_stats_new_cb(void)
1989 struct dp_netdev_stats *bucket = xzalloc_cacheline(sizeof *bucket);
1990 ovs_mutex_init(&bucket->mutex);
1995 dp_netdev_count_packet(struct dp_netdev *dp, enum dp_stat_type type)
1997 struct dp_netdev_stats *bucket;
1999 bucket = ovsthread_stats_bucket_get(&dp->stats, dp_netdev_stats_new_cb);
2000 ovs_mutex_lock(&bucket->mutex);
2002 ovs_mutex_unlock(&bucket->mutex);
2006 dp_netdev_input(struct dp_netdev *dp, struct dpif_packet *packet,
2007 struct pkt_metadata *md)
2009 struct dp_netdev_flow *netdev_flow;
2010 struct ofpbuf *buf = &packet->ofpbuf;
2012 struct miniflow flow;
2013 uint32_t buf[FLOW_U32S];
2016 if (ofpbuf_size(buf) < ETH_HEADER_LEN) {
2017 dpif_packet_delete(packet);
2020 miniflow_initialize(&key.flow, key.buf);
2021 miniflow_extract(buf, md, &key.flow);
2023 netdev_flow = dp_netdev_lookup_flow(dp, &key.flow);
2025 struct dp_netdev_actions *actions;
2027 dp_netdev_flow_used(netdev_flow, buf, &key.flow);
2029 actions = dp_netdev_flow_get_actions(netdev_flow);
2030 dp_netdev_execute_actions(dp, &key.flow, 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, buf, miniflow_hash_5tuple(&key.flow, 0)
2037 DPIF_UC_MISS, &key.flow, NULL);
2042 dp_netdev_port_input(struct dp_netdev *dp, struct dpif_packet *packet,
2043 struct pkt_metadata *md)
2045 uint32_t *recirc_depth = recirc_depth_get();
2048 dp_netdev_input(dp, packet, md);
2052 dp_netdev_output_userspace(struct dp_netdev *dp, struct ofpbuf *packet,
2053 int queue_no, int type, const struct miniflow *key,
2054 const struct nlattr *userdata)
2056 struct dp_netdev_queue *q;
2059 fat_rwlock_rdlock(&dp->queue_rwlock);
2060 q = &dp->handler_queues[queue_no];
2061 ovs_mutex_lock(&q->mutex);
2062 if (q->head - q->tail < MAX_QUEUE_LEN) {
2063 struct dp_netdev_upcall *u = &q->upcalls[q->head++ & QUEUE_MASK];
2064 struct dpif_upcall *upcall = &u->upcall;
2065 struct ofpbuf *buf = &u->buf;
2069 upcall->type = type;
2071 /* Allocate buffer big enough for everything. */
2072 buf_size = ODPUTIL_FLOW_KEY_BYTES;
2074 buf_size += NLA_ALIGN(userdata->nla_len);
2076 ofpbuf_init(buf, buf_size);
2079 miniflow_expand(key, &flow);
2080 odp_flow_key_from_flow(buf, &flow, NULL, flow.in_port.odp_port, true);
2081 upcall->key = ofpbuf_data(buf);
2082 upcall->key_len = ofpbuf_size(buf);
2086 upcall->userdata = ofpbuf_put(buf, userdata,
2087 NLA_ALIGN(userdata->nla_len));
2090 upcall->packet = *packet;
2096 dp_netdev_count_packet(dp, DP_STAT_LOST);
2097 ofpbuf_delete(packet);
2100 ovs_mutex_unlock(&q->mutex);
2101 fat_rwlock_unlock(&dp->queue_rwlock);
2106 struct dp_netdev_execute_aux {
2107 struct dp_netdev *dp;
2108 const struct miniflow *key;
2112 dp_execute_cb(void *aux_, struct dpif_packet *packet,
2113 struct pkt_metadata *md,
2114 const struct nlattr *a, bool may_steal)
2115 OVS_NO_THREAD_SAFETY_ANALYSIS
2117 struct dp_netdev_execute_aux *aux = aux_;
2118 int type = nl_attr_type(a);
2119 struct dp_netdev_port *p;
2120 uint32_t *depth = recirc_depth_get();
2122 switch ((enum ovs_action_attr)type) {
2123 case OVS_ACTION_ATTR_OUTPUT:
2124 p = dp_netdev_lookup_port(aux->dp, u32_to_odp(nl_attr_get_u32(a)));
2126 netdev_send(p->netdev, &packet, 1, may_steal);
2130 case OVS_ACTION_ATTR_USERSPACE: {
2131 struct ofpbuf *userspace_packet;
2132 const struct nlattr *userdata;
2134 userdata = nl_attr_find_nested(a, OVS_USERSPACE_ATTR_USERDATA);
2135 userspace_packet = may_steal
2137 : ofpbuf_clone(&packet->ofpbuf);
2139 dp_netdev_output_userspace(aux->dp, userspace_packet,
2140 miniflow_hash_5tuple(aux->key, 0)
2141 % aux->dp->n_handlers,
2142 DPIF_UC_ACTION, aux->key,
2147 case OVS_ACTION_ATTR_HASH: {
2148 const struct ovs_action_hash *hash_act;
2151 hash_act = nl_attr_get(a);
2152 if (hash_act->hash_alg == OVS_HASH_ALG_L4) {
2153 /* Hash need not be symmetric, nor does it need to include
2155 hash = miniflow_hash_5tuple(aux->key, hash_act->hash_basis);
2157 hash = 1; /* 0 is not valid */
2161 VLOG_WARN("Unknown hash algorithm specified for the hash action.");
2169 case OVS_ACTION_ATTR_RECIRC:
2170 if (*depth < MAX_RECIRC_DEPTH) {
2171 struct pkt_metadata recirc_md = *md;
2172 struct dpif_packet *recirc_packet;
2174 recirc_packet = may_steal ? packet : dpif_packet_clone(packet);
2175 recirc_md.recirc_id = nl_attr_get_u32(a);
2178 dp_netdev_input(aux->dp, recirc_packet, &recirc_md);
2183 VLOG_WARN("Packet dropped. Max recirculation depth exceeded.");
2187 case OVS_ACTION_ATTR_PUSH_VLAN:
2188 case OVS_ACTION_ATTR_POP_VLAN:
2189 case OVS_ACTION_ATTR_PUSH_MPLS:
2190 case OVS_ACTION_ATTR_POP_MPLS:
2191 case OVS_ACTION_ATTR_SET:
2192 case OVS_ACTION_ATTR_SAMPLE:
2193 case OVS_ACTION_ATTR_UNSPEC:
2194 case __OVS_ACTION_ATTR_MAX:
2200 dp_netdev_execute_actions(struct dp_netdev *dp, const struct miniflow *key,
2201 struct dpif_packet *packet, bool may_steal,
2202 struct pkt_metadata *md,
2203 const struct nlattr *actions, size_t actions_len)
2205 struct dp_netdev_execute_aux aux = {dp, key};
2207 odp_execute_actions(&aux, packet, may_steal, md,
2208 actions, actions_len, dp_execute_cb);
2211 const struct dpif_class dpif_netdev_class = {
2213 dpif_netdev_enumerate,
2214 dpif_netdev_port_open_type,
2217 dpif_netdev_destroy,
2220 dpif_netdev_get_stats,
2221 dpif_netdev_port_add,
2222 dpif_netdev_port_del,
2223 dpif_netdev_port_query_by_number,
2224 dpif_netdev_port_query_by_name,
2225 NULL, /* port_get_pid */
2226 dpif_netdev_port_dump_start,
2227 dpif_netdev_port_dump_next,
2228 dpif_netdev_port_dump_done,
2229 dpif_netdev_port_poll,
2230 dpif_netdev_port_poll_wait,
2231 dpif_netdev_flow_get,
2232 dpif_netdev_flow_put,
2233 dpif_netdev_flow_del,
2234 dpif_netdev_flow_flush,
2235 dpif_netdev_flow_dump_create,
2236 dpif_netdev_flow_dump_destroy,
2237 dpif_netdev_flow_dump_thread_create,
2238 dpif_netdev_flow_dump_thread_destroy,
2239 dpif_netdev_flow_dump_next,
2240 dpif_netdev_execute,
2242 dpif_netdev_recv_set,
2243 dpif_netdev_handlers_set,
2244 dpif_netdev_queue_to_priority,
2246 dpif_netdev_recv_wait,
2247 dpif_netdev_recv_purge,
2251 dpif_dummy_change_port_number(struct unixctl_conn *conn, int argc OVS_UNUSED,
2252 const char *argv[], void *aux OVS_UNUSED)
2254 struct dp_netdev_port *old_port;
2255 struct dp_netdev_port *new_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_mutex_lock(&dp->port_mutex);
2270 if (get_port_by_name(dp, argv[2], &old_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");
2285 /* Remove old port. */
2286 cmap_remove(&dp->ports, &old_port->node, hash_port_no(old_port->port_no));
2287 ovsrcu_postpone(free, old_port);
2289 /* Insert new port (cmap semantics mean we cannot re-insert 'old_port'). */
2290 new_port = xmemdup(old_port, sizeof *old_port);
2291 new_port->port_no = port_no;
2292 cmap_insert(&dp->ports, &new_port->node, hash_port_no(port_no));
2294 seq_change(dp->port_seq);
2295 unixctl_command_reply(conn, NULL);
2298 ovs_mutex_unlock(&dp->port_mutex);
2299 dp_netdev_unref(dp);
2303 dpif_dummy_delete_port(struct unixctl_conn *conn, int argc OVS_UNUSED,
2304 const char *argv[], void *aux OVS_UNUSED)
2306 struct dp_netdev_port *port;
2307 struct dp_netdev *dp;
2309 ovs_mutex_lock(&dp_netdev_mutex);
2310 dp = shash_find_data(&dp_netdevs, argv[1]);
2311 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
2312 ovs_mutex_unlock(&dp_netdev_mutex);
2313 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
2316 ovs_refcount_ref(&dp->ref_cnt);
2317 ovs_mutex_unlock(&dp_netdev_mutex);
2319 ovs_mutex_lock(&dp->port_mutex);
2320 if (get_port_by_name(dp, argv[2], &port)) {
2321 unixctl_command_reply_error(conn, "unknown port");
2322 } else if (port->port_no == ODPP_LOCAL) {
2323 unixctl_command_reply_error(conn, "can't delete local port");
2325 do_del_port(dp, port);
2326 unixctl_command_reply(conn, NULL);
2328 ovs_mutex_unlock(&dp->port_mutex);
2330 dp_netdev_unref(dp);
2334 dpif_dummy_register__(const char *type)
2336 struct dpif_class *class;
2338 class = xmalloc(sizeof *class);
2339 *class = dpif_netdev_class;
2340 class->type = xstrdup(type);
2341 dp_register_provider(class);
2345 dpif_dummy_register(bool override)
2352 dp_enumerate_types(&types);
2353 SSET_FOR_EACH (type, &types) {
2354 if (!dp_unregister_provider(type)) {
2355 dpif_dummy_register__(type);
2358 sset_destroy(&types);
2361 dpif_dummy_register__("dummy");
2363 unixctl_command_register("dpif-dummy/change-port-number",
2364 "DP PORT NEW-NUMBER",
2365 3, 3, dpif_dummy_change_port_number, NULL);
2366 unixctl_command_register("dpif-dummy/delete-port", "DP PORT",
2367 2, 2, dpif_dummy_delete_port, NULL);