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"
56 #include "poll-loop.h"
66 VLOG_DEFINE_THIS_MODULE(dpif_netdev);
68 /* By default, choose a priority in the middle. */
69 #define NETDEV_RULE_PRIORITY 0x8000
72 /* Use per thread recirc_depth to prevent recirculation loop. */
73 #define MAX_RECIRC_DEPTH 5
74 DEFINE_STATIC_PER_THREAD_DATA(uint32_t, recirc_depth, 0)
76 /* Configuration parameters. */
77 enum { MAX_FLOWS = 65536 }; /* Maximum number of flows in flow table. */
80 enum { MAX_QUEUE_LEN = 128 }; /* Maximum number of packets per queue. */
81 enum { QUEUE_MASK = MAX_QUEUE_LEN - 1 };
82 BUILD_ASSERT_DECL(IS_POW2(MAX_QUEUE_LEN));
84 /* Protects against changes to 'dp_netdevs'. */
85 static struct ovs_mutex dp_netdev_mutex = OVS_MUTEX_INITIALIZER;
87 /* Contains all 'struct dp_netdev's. */
88 static struct shash dp_netdevs OVS_GUARDED_BY(dp_netdev_mutex)
89 = SHASH_INITIALIZER(&dp_netdevs);
91 struct dp_netdev_upcall {
92 struct dpif_upcall upcall; /* Queued upcall information. */
93 struct ofpbuf buf; /* ofpbuf instance for upcall.packet. */
96 /* A queue passing packets from a struct dp_netdev to its clients (handlers).
102 * Any access at all requires the owning 'dp_netdev''s queue_rwlock and
104 struct dp_netdev_queue {
105 struct ovs_mutex mutex;
106 struct seq *seq; /* Incremented whenever a packet is queued. */
107 struct dp_netdev_upcall upcalls[MAX_QUEUE_LEN] OVS_GUARDED;
108 unsigned int head OVS_GUARDED;
109 unsigned int tail OVS_GUARDED;
112 /* Datapath based on the network device interface from netdev.h.
118 * Some members, marked 'const', are immutable. Accessing other members
119 * requires synchronization, as noted in more detail below.
121 * Acquisition order is, from outermost to innermost:
123 * dp_netdev_mutex (global)
130 const struct dpif_class *const class;
131 const char *const name;
132 struct ovs_refcount ref_cnt;
133 atomic_flag destroyed;
137 * Readers of 'cls' and 'flow_table' must take a 'cls->rwlock' read lock.
139 * Writers of 'cls' and 'flow_table' must take the 'flow_mutex' and then
140 * the 'cls->rwlock' write lock. (The outer 'flow_mutex' allows writers to
141 * atomically perform multiple operations on 'cls' and 'flow_table'.)
143 struct ovs_mutex flow_mutex;
144 struct classifier cls; /* Classifier. Protected by cls.rwlock. */
145 struct hmap flow_table OVS_GUARDED; /* Flow table. */
149 * 'queue_rwlock' protects the modification of 'handler_queues' and
150 * 'n_handlers'. The queue elements are protected by its
151 * 'handler_queues''s mutex. */
152 struct fat_rwlock queue_rwlock;
153 struct dp_netdev_queue *handler_queues;
158 * ovsthread_stats is internally synchronized. */
159 struct ovsthread_stats stats; /* Contains 'struct dp_netdev_stats *'. */
163 * Protected by RCU. Take the mutex to add or remove ports. */
164 struct ovs_mutex port_mutex;
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,
179 DP_STAT_HIT, /* Packets that matched in the flow table. */
180 DP_STAT_MISS, /* Packets that did not match. */
181 DP_STAT_LOST, /* Packets not passed up to the client. */
185 /* Contained by struct dp_netdev's 'stats' member. */
186 struct dp_netdev_stats {
187 struct ovs_mutex mutex; /* Protects 'n'. */
189 /* Indexed by DP_STAT_*, protected by 'mutex'. */
190 unsigned long long int n[DP_N_STATS] OVS_GUARDED;
194 /* A port in a netdev-based datapath. */
195 struct dp_netdev_port {
196 struct cmap_node node; /* Node in dp_netdev's 'ports'. */
198 struct netdev *netdev;
199 struct netdev_saved_flags *sf;
200 struct netdev_rxq **rxq;
201 struct ovs_refcount ref_cnt;
202 char *type; /* Port type as requested by user. */
205 /* A flow in dp_netdev's 'flow_table'.
211 * Except near the beginning or ending of its lifespan, rule 'rule' belongs to
212 * its dp_netdev's classifier. The text below calls this classifier 'cls'.
217 * The thread safety rules described here for "struct dp_netdev_flow" are
218 * motivated by two goals:
220 * - Prevent threads that read members of "struct dp_netdev_flow" from
221 * reading bad data due to changes by some thread concurrently modifying
224 * - Prevent two threads making changes to members of a given "struct
225 * dp_netdev_flow" from interfering with each other.
231 * A flow 'flow' may be accessed without a risk of being freed by code that
232 * holds a read-lock or write-lock on 'cls->rwlock' or that owns a reference to
233 * 'flow->ref_cnt' (or both). Code that needs to hold onto a flow for a while
234 * should take 'cls->rwlock', find the flow it needs, increment 'flow->ref_cnt'
235 * with dpif_netdev_flow_ref(), and drop 'cls->rwlock'.
237 * 'flow->ref_cnt' protects 'flow' from being freed. It doesn't protect the
238 * flow from being deleted from 'cls' (that's 'cls->rwlock') and it doesn't
239 * protect members of 'flow' from modification.
241 * Some members, marked 'const', are immutable. Accessing other members
242 * requires synchronization, as noted in more detail below.
244 struct dp_netdev_flow {
245 /* Packet classification. */
246 const struct cls_rule cr; /* In owning dp_netdev's 'cls'. */
248 /* Hash table index by unmasked flow. */
249 const struct hmap_node node; /* In owning dp_netdev's 'flow_table'. */
250 const struct flow flow; /* The flow that created this entry. */
254 * Reading or writing these members requires 'mutex'. */
255 struct ovsthread_stats stats; /* Contains "struct dp_netdev_flow_stats". */
258 OVSRCU_TYPE(struct dp_netdev_actions *) actions;
261 static void dp_netdev_flow_free(struct dp_netdev_flow *);
263 /* Contained by struct dp_netdev_flow's 'stats' member. */
264 struct dp_netdev_flow_stats {
265 struct ovs_mutex mutex; /* Guards all the other members. */
267 long long int used OVS_GUARDED; /* Last used time, in monotonic msecs. */
268 long long int packet_count OVS_GUARDED; /* Number of packets matched. */
269 long long int byte_count OVS_GUARDED; /* Number of bytes matched. */
270 uint16_t tcp_flags OVS_GUARDED; /* Bitwise-OR of seen tcp_flags values. */
273 /* A set of datapath actions within a "struct dp_netdev_flow".
279 * A struct dp_netdev_actions 'actions' is protected with RCU. */
280 struct dp_netdev_actions {
281 /* These members are immutable: they do not change during the struct's
283 struct nlattr *actions; /* Sequence of OVS_ACTION_ATTR_* attributes. */
284 unsigned int size; /* Size of 'actions', in bytes. */
287 struct dp_netdev_actions *dp_netdev_actions_create(const struct nlattr *,
289 struct dp_netdev_actions *dp_netdev_flow_get_actions(
290 const struct dp_netdev_flow *);
291 static void dp_netdev_actions_free(struct dp_netdev_actions *);
293 /* PMD: Poll modes drivers. PMD accesses devices via polling to eliminate
294 * the performance overhead of interrupt processing. Therefore netdev can
295 * not implement rx-wait for these devices. dpif-netdev needs to poll
296 * these device to check for recv buffer. pmd-thread does polling for
297 * devices assigned to itself thread.
299 * DPDK used PMD for accessing NIC.
301 * A thread that receives packets from PMD ports, looks them up in the flow
302 * table, and executes the actions it finds.
305 struct dp_netdev *dp;
308 atomic_uint change_seq;
311 /* Interface to netdev-based datapath. */
314 struct dp_netdev *dp;
315 uint64_t last_port_seq;
318 static int get_port_by_number(struct dp_netdev *dp, odp_port_t port_no,
319 struct dp_netdev_port **portp);
320 static int get_port_by_name(struct dp_netdev *dp, const char *devname,
321 struct dp_netdev_port **portp);
322 static void dp_netdev_free(struct dp_netdev *)
323 OVS_REQUIRES(dp_netdev_mutex);
324 static void dp_netdev_flow_flush(struct dp_netdev *);
325 static int do_add_port(struct dp_netdev *dp, const char *devname,
326 const char *type, odp_port_t port_no)
327 OVS_REQUIRES(dp->port_mutex);
328 static void do_del_port(struct dp_netdev *dp, struct dp_netdev_port *)
329 OVS_REQUIRES(dp->port_mutex);
330 static void dp_netdev_destroy_all_queues(struct dp_netdev *dp)
331 OVS_REQ_WRLOCK(dp->queue_rwlock);
332 static int dpif_netdev_open(const struct dpif_class *, const char *name,
333 bool create, struct dpif **);
334 static int dp_netdev_output_userspace(struct dp_netdev *dp, struct ofpbuf *,
335 int queue_no, int type,
336 const struct miniflow *,
337 const struct nlattr *userdata);
338 static void dp_netdev_execute_actions(struct dp_netdev *dp,
339 const struct miniflow *,
340 struct ofpbuf *, bool may_steal,
341 struct pkt_metadata *,
342 const struct nlattr *actions,
344 static void dp_netdev_port_input(struct dp_netdev *dp, struct ofpbuf *packet,
345 struct pkt_metadata *);
347 static void dp_netdev_set_pmd_threads(struct dp_netdev *, int n);
349 static struct dpif_netdev *
350 dpif_netdev_cast(const struct dpif *dpif)
352 ovs_assert(dpif->dpif_class->open == dpif_netdev_open);
353 return CONTAINER_OF(dpif, struct dpif_netdev, dpif);
356 static struct dp_netdev *
357 get_dp_netdev(const struct dpif *dpif)
359 return dpif_netdev_cast(dpif)->dp;
363 dpif_netdev_enumerate(struct sset *all_dps,
364 const struct dpif_class *dpif_class)
366 struct shash_node *node;
368 ovs_mutex_lock(&dp_netdev_mutex);
369 SHASH_FOR_EACH(node, &dp_netdevs) {
370 struct dp_netdev *dp = node->data;
371 if (dpif_class != dp->class) {
372 /* 'dp_netdevs' contains both "netdev" and "dummy" dpifs.
373 * If the class doesn't match, skip this dpif. */
376 sset_add(all_dps, node->name);
378 ovs_mutex_unlock(&dp_netdev_mutex);
384 dpif_netdev_class_is_dummy(const struct dpif_class *class)
386 return class != &dpif_netdev_class;
390 dpif_netdev_port_open_type(const struct dpif_class *class, const char *type)
392 return strcmp(type, "internal") ? type
393 : dpif_netdev_class_is_dummy(class) ? "dummy"
398 create_dpif_netdev(struct dp_netdev *dp)
400 uint16_t netflow_id = hash_string(dp->name, 0);
401 struct dpif_netdev *dpif;
403 ovs_refcount_ref(&dp->ref_cnt);
405 dpif = xmalloc(sizeof *dpif);
406 dpif_init(&dpif->dpif, dp->class, dp->name, netflow_id >> 8, netflow_id);
408 dpif->last_port_seq = seq_read(dp->port_seq);
413 /* Choose an unused, non-zero port number and return it on success.
414 * Return ODPP_NONE on failure. */
416 choose_port(struct dp_netdev *dp, const char *name)
417 OVS_REQUIRES(dp->port_mutex)
421 if (dp->class != &dpif_netdev_class) {
425 /* If the port name begins with "br", start the number search at
426 * 100 to make writing tests easier. */
427 if (!strncmp(name, "br", 2)) {
431 /* If the port name contains a number, try to assign that port number.
432 * This can make writing unit tests easier because port numbers are
434 for (p = name; *p != '\0'; p++) {
435 if (isdigit((unsigned char) *p)) {
436 port_no = start_no + strtol(p, NULL, 10);
437 if (port_no > 0 && port_no != odp_to_u32(ODPP_NONE)
438 && !dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
439 return u32_to_odp(port_no);
446 for (port_no = 1; port_no <= UINT16_MAX; port_no++) {
447 if (!dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
448 return u32_to_odp(port_no);
456 create_dp_netdev(const char *name, const struct dpif_class *class,
457 struct dp_netdev **dpp)
458 OVS_REQUIRES(dp_netdev_mutex)
460 struct dp_netdev *dp;
463 dp = xzalloc(sizeof *dp);
464 shash_add(&dp_netdevs, name, dp);
466 *CONST_CAST(const struct dpif_class **, &dp->class) = class;
467 *CONST_CAST(const char **, &dp->name) = xstrdup(name);
468 ovs_refcount_init(&dp->ref_cnt);
469 atomic_flag_clear(&dp->destroyed);
471 ovs_mutex_init(&dp->flow_mutex);
472 classifier_init(&dp->cls, NULL);
473 hmap_init(&dp->flow_table);
475 fat_rwlock_init(&dp->queue_rwlock);
477 ovsthread_stats_init(&dp->stats);
479 ovs_mutex_init(&dp->port_mutex);
480 cmap_init(&dp->ports);
481 dp->port_seq = seq_create();
482 latch_init(&dp->exit_latch);
484 ovs_mutex_lock(&dp->port_mutex);
485 error = do_add_port(dp, name, "internal", ODPP_LOCAL);
486 ovs_mutex_unlock(&dp->port_mutex);
497 dpif_netdev_open(const struct dpif_class *class, const char *name,
498 bool create, struct dpif **dpifp)
500 struct dp_netdev *dp;
503 ovs_mutex_lock(&dp_netdev_mutex);
504 dp = shash_find_data(&dp_netdevs, name);
506 error = create ? create_dp_netdev(name, class, &dp) : ENODEV;
508 error = (dp->class != class ? EINVAL
513 *dpifp = create_dpif_netdev(dp);
515 ovs_mutex_unlock(&dp_netdev_mutex);
521 dp_netdev_purge_queues(struct dp_netdev *dp)
522 OVS_REQ_WRLOCK(dp->queue_rwlock)
526 for (i = 0; i < dp->n_handlers; i++) {
527 struct dp_netdev_queue *q = &dp->handler_queues[i];
529 ovs_mutex_lock(&q->mutex);
530 while (q->tail != q->head) {
531 struct dp_netdev_upcall *u = &q->upcalls[q->tail++ & QUEUE_MASK];
532 ofpbuf_uninit(&u->upcall.packet);
533 ofpbuf_uninit(&u->buf);
535 ovs_mutex_unlock(&q->mutex);
539 /* Requires dp_netdev_mutex so that we can't get a new reference to 'dp'
540 * through the 'dp_netdevs' shash while freeing 'dp'. */
542 dp_netdev_free(struct dp_netdev *dp)
543 OVS_REQUIRES(dp_netdev_mutex)
545 struct dp_netdev_port *port;
546 struct dp_netdev_stats *bucket;
549 shash_find_and_delete(&dp_netdevs, dp->name);
551 dp_netdev_set_pmd_threads(dp, 0);
552 free(dp->pmd_threads);
554 dp_netdev_flow_flush(dp);
555 ovs_mutex_lock(&dp->port_mutex);
556 CMAP_FOR_EACH (port, node, &dp->ports) {
557 do_del_port(dp, port);
559 ovs_mutex_unlock(&dp->port_mutex);
561 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
562 ovs_mutex_destroy(&bucket->mutex);
563 free_cacheline(bucket);
565 ovsthread_stats_destroy(&dp->stats);
567 fat_rwlock_wrlock(&dp->queue_rwlock);
568 dp_netdev_destroy_all_queues(dp);
569 fat_rwlock_unlock(&dp->queue_rwlock);
571 fat_rwlock_destroy(&dp->queue_rwlock);
573 classifier_destroy(&dp->cls);
574 hmap_destroy(&dp->flow_table);
575 ovs_mutex_destroy(&dp->flow_mutex);
576 seq_destroy(dp->port_seq);
577 cmap_destroy(&dp->ports);
578 latch_destroy(&dp->exit_latch);
579 free(CONST_CAST(char *, dp->name));
584 dp_netdev_unref(struct dp_netdev *dp)
587 /* Take dp_netdev_mutex so that, if dp->ref_cnt falls to zero, we can't
588 * get a new reference to 'dp' through the 'dp_netdevs' shash. */
589 ovs_mutex_lock(&dp_netdev_mutex);
590 if (ovs_refcount_unref(&dp->ref_cnt) == 1) {
593 ovs_mutex_unlock(&dp_netdev_mutex);
598 dpif_netdev_close(struct dpif *dpif)
600 struct dp_netdev *dp = get_dp_netdev(dpif);
607 dpif_netdev_destroy(struct dpif *dpif)
609 struct dp_netdev *dp = get_dp_netdev(dpif);
611 if (!atomic_flag_test_and_set(&dp->destroyed)) {
612 if (ovs_refcount_unref(&dp->ref_cnt) == 1) {
613 /* Can't happen: 'dpif' still owns a reference to 'dp'. */
622 dpif_netdev_get_stats(const struct dpif *dpif, struct dpif_dp_stats *stats)
624 struct dp_netdev *dp = get_dp_netdev(dpif);
625 struct dp_netdev_stats *bucket;
628 fat_rwlock_rdlock(&dp->cls.rwlock);
629 stats->n_flows = hmap_count(&dp->flow_table);
630 fat_rwlock_unlock(&dp->cls.rwlock);
632 stats->n_hit = stats->n_missed = stats->n_lost = 0;
633 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
634 ovs_mutex_lock(&bucket->mutex);
635 stats->n_hit += bucket->n[DP_STAT_HIT];
636 stats->n_missed += bucket->n[DP_STAT_MISS];
637 stats->n_lost += bucket->n[DP_STAT_LOST];
638 ovs_mutex_unlock(&bucket->mutex);
640 stats->n_masks = UINT32_MAX;
641 stats->n_mask_hit = UINT64_MAX;
647 dp_netdev_reload_pmd_threads(struct dp_netdev *dp)
651 for (i = 0; i < dp->n_pmd_threads; i++) {
652 struct pmd_thread *f = &dp->pmd_threads[i];
655 atomic_add(&f->change_seq, 1, &id);
660 hash_port_no(odp_port_t port_no)
662 return hash_int(odp_to_u32(port_no), 0);
666 do_add_port(struct dp_netdev *dp, const char *devname, const char *type,
668 OVS_REQUIRES(dp->port_mutex)
670 struct netdev_saved_flags *sf;
671 struct dp_netdev_port *port;
672 struct netdev *netdev;
673 enum netdev_flags flags;
674 const char *open_type;
678 /* XXX reject devices already in some dp_netdev. */
680 /* Open and validate network device. */
681 open_type = dpif_netdev_port_open_type(dp->class, type);
682 error = netdev_open(devname, open_type, &netdev);
686 /* XXX reject non-Ethernet devices */
688 netdev_get_flags(netdev, &flags);
689 if (flags & NETDEV_LOOPBACK) {
690 VLOG_ERR("%s: cannot add a loopback device", devname);
691 netdev_close(netdev);
695 port = xzalloc(sizeof *port);
696 port->port_no = port_no;
697 port->netdev = netdev;
698 port->rxq = xmalloc(sizeof *port->rxq * netdev_n_rxq(netdev));
699 port->type = xstrdup(type);
700 for (i = 0; i < netdev_n_rxq(netdev); i++) {
701 error = netdev_rxq_open(netdev, &port->rxq[i], i);
703 && !(error == EOPNOTSUPP && dpif_netdev_class_is_dummy(dp->class))) {
704 VLOG_ERR("%s: cannot receive packets on this network device (%s)",
705 devname, ovs_strerror(errno));
706 netdev_close(netdev);
711 error = netdev_turn_flags_on(netdev, NETDEV_PROMISC, &sf);
713 for (i = 0; i < netdev_n_rxq(netdev); i++) {
714 netdev_rxq_close(port->rxq[i]);
716 netdev_close(netdev);
723 if (netdev_is_pmd(netdev)) {
725 dp_netdev_set_pmd_threads(dp, NR_THREADS);
726 dp_netdev_reload_pmd_threads(dp);
728 ovs_refcount_init(&port->ref_cnt);
730 cmap_insert(&dp->ports, &port->node, hash_port_no(port_no));
731 seq_change(dp->port_seq);
737 dpif_netdev_port_add(struct dpif *dpif, struct netdev *netdev,
738 odp_port_t *port_nop)
740 struct dp_netdev *dp = get_dp_netdev(dpif);
741 char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
742 const char *dpif_port;
746 ovs_mutex_lock(&dp->port_mutex);
747 dpif_port = netdev_vport_get_dpif_port(netdev, namebuf, sizeof namebuf);
748 if (*port_nop != ODPP_NONE) {
750 error = dp_netdev_lookup_port(dp, *port_nop) ? EBUSY : 0;
752 port_no = choose_port(dp, dpif_port);
753 error = port_no == ODPP_NONE ? EFBIG : 0;
757 error = do_add_port(dp, dpif_port, netdev_get_type(netdev), port_no);
759 ovs_mutex_unlock(&dp->port_mutex);
765 dpif_netdev_port_del(struct dpif *dpif, odp_port_t port_no)
767 struct dp_netdev *dp = get_dp_netdev(dpif);
770 ovs_mutex_lock(&dp->port_mutex);
771 if (port_no == ODPP_LOCAL) {
774 struct dp_netdev_port *port;
776 error = get_port_by_number(dp, port_no, &port);
778 do_del_port(dp, port);
781 ovs_mutex_unlock(&dp->port_mutex);
787 is_valid_port_number(odp_port_t port_no)
789 return port_no != ODPP_NONE;
792 static struct dp_netdev_port *
793 dp_netdev_lookup_port(const struct dp_netdev *dp, odp_port_t port_no)
795 struct dp_netdev_port *port;
797 CMAP_FOR_EACH_WITH_HASH (port, node, hash_port_no(port_no), &dp->ports) {
798 if (port->port_no == port_no) {
806 get_port_by_number(struct dp_netdev *dp,
807 odp_port_t port_no, struct dp_netdev_port **portp)
809 if (!is_valid_port_number(port_no)) {
813 *portp = dp_netdev_lookup_port(dp, port_no);
814 return *portp ? 0 : ENOENT;
819 port_ref(struct dp_netdev_port *port)
822 ovs_refcount_ref(&port->ref_cnt);
827 port_destroy__(struct dp_netdev_port *port)
829 int n_rxq = netdev_n_rxq(port->netdev);
832 netdev_close(port->netdev);
833 netdev_restore_flags(port->sf);
835 for (i = 0; i < n_rxq; i++) {
836 netdev_rxq_close(port->rxq[i]);
844 port_unref(struct dp_netdev_port *port)
846 if (port && ovs_refcount_unref(&port->ref_cnt) == 1) {
847 ovsrcu_postpone(port_destroy__, port);
852 get_port_by_name(struct dp_netdev *dp,
853 const char *devname, struct dp_netdev_port **portp)
854 OVS_REQUIRES(dp->port_mutex)
856 struct dp_netdev_port *port;
858 CMAP_FOR_EACH (port, node, &dp->ports) {
859 if (!strcmp(netdev_get_name(port->netdev), devname)) {
868 do_del_port(struct dp_netdev *dp, struct dp_netdev_port *port)
869 OVS_REQUIRES(dp->port_mutex)
871 cmap_remove(&dp->ports, &port->node, hash_odp_port(port->port_no));
872 seq_change(dp->port_seq);
873 if (netdev_is_pmd(port->netdev)) {
874 dp_netdev_reload_pmd_threads(dp);
881 answer_port_query(const struct dp_netdev_port *port,
882 struct dpif_port *dpif_port)
884 dpif_port->name = xstrdup(netdev_get_name(port->netdev));
885 dpif_port->type = xstrdup(port->type);
886 dpif_port->port_no = port->port_no;
890 dpif_netdev_port_query_by_number(const struct dpif *dpif, odp_port_t port_no,
891 struct dpif_port *dpif_port)
893 struct dp_netdev *dp = get_dp_netdev(dpif);
894 struct dp_netdev_port *port;
897 error = get_port_by_number(dp, port_no, &port);
898 if (!error && dpif_port) {
899 answer_port_query(port, dpif_port);
906 dpif_netdev_port_query_by_name(const struct dpif *dpif, const char *devname,
907 struct dpif_port *dpif_port)
909 struct dp_netdev *dp = get_dp_netdev(dpif);
910 struct dp_netdev_port *port;
913 ovs_mutex_lock(&dp->port_mutex);
914 error = get_port_by_name(dp, devname, &port);
915 if (!error && dpif_port) {
916 answer_port_query(port, dpif_port);
918 ovs_mutex_unlock(&dp->port_mutex);
924 dp_netdev_flow_free(struct dp_netdev_flow *flow)
926 struct dp_netdev_flow_stats *bucket;
929 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &flow->stats) {
930 ovs_mutex_destroy(&bucket->mutex);
931 free_cacheline(bucket);
933 ovsthread_stats_destroy(&flow->stats);
935 cls_rule_destroy(CONST_CAST(struct cls_rule *, &flow->cr));
936 dp_netdev_actions_free(dp_netdev_flow_get_actions(flow));
941 dp_netdev_remove_flow(struct dp_netdev *dp, struct dp_netdev_flow *flow)
942 OVS_REQ_WRLOCK(dp->cls.rwlock)
943 OVS_REQUIRES(dp->flow_mutex)
945 struct cls_rule *cr = CONST_CAST(struct cls_rule *, &flow->cr);
946 struct hmap_node *node = CONST_CAST(struct hmap_node *, &flow->node);
948 classifier_remove(&dp->cls, cr);
949 hmap_remove(&dp->flow_table, node);
950 ovsrcu_postpone(dp_netdev_flow_free, flow);
954 dp_netdev_flow_flush(struct dp_netdev *dp)
956 struct dp_netdev_flow *netdev_flow, *next;
958 ovs_mutex_lock(&dp->flow_mutex);
959 fat_rwlock_wrlock(&dp->cls.rwlock);
960 HMAP_FOR_EACH_SAFE (netdev_flow, next, node, &dp->flow_table) {
961 dp_netdev_remove_flow(dp, netdev_flow);
963 fat_rwlock_unlock(&dp->cls.rwlock);
964 ovs_mutex_unlock(&dp->flow_mutex);
968 dpif_netdev_flow_flush(struct dpif *dpif)
970 struct dp_netdev *dp = get_dp_netdev(dpif);
972 dp_netdev_flow_flush(dp);
976 struct dp_netdev_port_state {
977 struct cmap_position position;
982 dpif_netdev_port_dump_start(const struct dpif *dpif OVS_UNUSED, void **statep)
984 *statep = xzalloc(sizeof(struct dp_netdev_port_state));
989 dpif_netdev_port_dump_next(const struct dpif *dpif, void *state_,
990 struct dpif_port *dpif_port)
992 struct dp_netdev_port_state *state = state_;
993 struct dp_netdev *dp = get_dp_netdev(dpif);
994 struct cmap_node *node;
997 node = cmap_next_position(&dp->ports, &state->position);
999 struct dp_netdev_port *port;
1001 port = CONTAINER_OF(node, struct dp_netdev_port, node);
1004 state->name = xstrdup(netdev_get_name(port->netdev));
1005 dpif_port->name = state->name;
1006 dpif_port->type = port->type;
1007 dpif_port->port_no = port->port_no;
1018 dpif_netdev_port_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
1020 struct dp_netdev_port_state *state = state_;
1027 dpif_netdev_port_poll(const struct dpif *dpif_, char **devnamep OVS_UNUSED)
1029 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
1030 uint64_t new_port_seq;
1033 new_port_seq = seq_read(dpif->dp->port_seq);
1034 if (dpif->last_port_seq != new_port_seq) {
1035 dpif->last_port_seq = new_port_seq;
1045 dpif_netdev_port_poll_wait(const struct dpif *dpif_)
1047 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
1049 seq_wait(dpif->dp->port_seq, dpif->last_port_seq);
1052 static struct dp_netdev_flow *
1053 dp_netdev_flow_cast(const struct cls_rule *cr)
1055 return cr ? CONTAINER_OF(cr, struct dp_netdev_flow, cr) : NULL;
1058 static struct dp_netdev_flow *
1059 dp_netdev_lookup_flow(const struct dp_netdev *dp, const struct miniflow *key)
1060 OVS_EXCLUDED(dp->cls.rwlock)
1062 struct dp_netdev_flow *netdev_flow;
1063 struct cls_rule *rule;
1065 fat_rwlock_rdlock(&dp->cls.rwlock);
1066 rule = classifier_lookup_miniflow_first(&dp->cls, key);
1067 netdev_flow = dp_netdev_flow_cast(rule);
1068 fat_rwlock_unlock(&dp->cls.rwlock);
1073 static struct dp_netdev_flow *
1074 dp_netdev_find_flow(const struct dp_netdev *dp, const struct flow *flow)
1075 OVS_REQ_RDLOCK(dp->cls.rwlock)
1077 struct dp_netdev_flow *netdev_flow;
1079 HMAP_FOR_EACH_WITH_HASH (netdev_flow, node, flow_hash(flow, 0),
1081 if (flow_equal(&netdev_flow->flow, flow)) {
1090 get_dpif_flow_stats(struct dp_netdev_flow *netdev_flow,
1091 struct dpif_flow_stats *stats)
1093 struct dp_netdev_flow_stats *bucket;
1096 memset(stats, 0, sizeof *stats);
1097 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
1098 ovs_mutex_lock(&bucket->mutex);
1099 stats->n_packets += bucket->packet_count;
1100 stats->n_bytes += bucket->byte_count;
1101 stats->used = MAX(stats->used, bucket->used);
1102 stats->tcp_flags |= bucket->tcp_flags;
1103 ovs_mutex_unlock(&bucket->mutex);
1108 dpif_netdev_mask_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1109 const struct nlattr *mask_key,
1110 uint32_t mask_key_len, const struct flow *flow,
1114 enum odp_key_fitness fitness;
1116 fitness = odp_flow_key_to_mask(mask_key, mask_key_len, mask, flow);
1118 /* This should not happen: it indicates that
1119 * odp_flow_key_from_mask() and odp_flow_key_to_mask()
1120 * disagree on the acceptable form of a mask. Log the problem
1121 * as an error, with enough details to enable debugging. */
1122 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1124 if (!VLOG_DROP_ERR(&rl)) {
1128 odp_flow_format(key, key_len, mask_key, mask_key_len, NULL, &s,
1130 VLOG_ERR("internal error parsing flow mask %s (%s)",
1131 ds_cstr(&s), odp_key_fitness_to_string(fitness));
1138 enum mf_field_id id;
1139 /* No mask key, unwildcard everything except fields whose
1140 * prerequisities are not met. */
1141 memset(mask, 0x0, sizeof *mask);
1143 for (id = 0; id < MFF_N_IDS; ++id) {
1144 /* Skip registers and metadata. */
1145 if (!(id >= MFF_REG0 && id < MFF_REG0 + FLOW_N_REGS)
1146 && id != MFF_METADATA) {
1147 const struct mf_field *mf = mf_from_id(id);
1148 if (mf_are_prereqs_ok(mf, flow)) {
1149 mf_mask_field(mf, mask);
1155 /* Force unwildcard the in_port.
1157 * We need to do this even in the case where we unwildcard "everything"
1158 * above because "everything" only includes the 16-bit OpenFlow port number
1159 * mask->in_port.ofp_port, which only covers half of the 32-bit datapath
1160 * port number mask->in_port.odp_port. */
1161 mask->in_port.odp_port = u32_to_odp(UINT32_MAX);
1167 dpif_netdev_flow_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1172 if (odp_flow_key_to_flow(key, key_len, flow)) {
1173 /* This should not happen: it indicates that odp_flow_key_from_flow()
1174 * and odp_flow_key_to_flow() disagree on the acceptable form of a
1175 * flow. Log the problem as an error, with enough details to enable
1177 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1179 if (!VLOG_DROP_ERR(&rl)) {
1183 odp_flow_format(key, key_len, NULL, 0, NULL, &s, true);
1184 VLOG_ERR("internal error parsing flow key %s", ds_cstr(&s));
1191 in_port = flow->in_port.odp_port;
1192 if (!is_valid_port_number(in_port) && in_port != ODPP_NONE) {
1200 dpif_netdev_flow_get(const struct dpif *dpif,
1201 const struct nlattr *nl_key, size_t nl_key_len,
1202 struct ofpbuf **actionsp, struct dpif_flow_stats *stats)
1204 struct dp_netdev *dp = get_dp_netdev(dpif);
1205 struct dp_netdev_flow *netdev_flow;
1209 error = dpif_netdev_flow_from_nlattrs(nl_key, nl_key_len, &key);
1214 fat_rwlock_rdlock(&dp->cls.rwlock);
1215 netdev_flow = dp_netdev_find_flow(dp, &key);
1216 fat_rwlock_unlock(&dp->cls.rwlock);
1220 get_dpif_flow_stats(netdev_flow, stats);
1224 struct dp_netdev_actions *actions;
1226 actions = dp_netdev_flow_get_actions(netdev_flow);
1227 *actionsp = ofpbuf_clone_data(actions->actions, actions->size);
1237 dp_netdev_flow_add(struct dp_netdev *dp, const struct flow *flow,
1238 const struct flow_wildcards *wc,
1239 const struct nlattr *actions,
1241 OVS_REQUIRES(dp->flow_mutex)
1243 struct dp_netdev_flow *netdev_flow;
1246 netdev_flow = xzalloc(sizeof *netdev_flow);
1247 *CONST_CAST(struct flow *, &netdev_flow->flow) = *flow;
1249 ovsthread_stats_init(&netdev_flow->stats);
1251 ovsrcu_set(&netdev_flow->actions,
1252 dp_netdev_actions_create(actions, actions_len));
1254 match_init(&match, flow, wc);
1255 cls_rule_init(CONST_CAST(struct cls_rule *, &netdev_flow->cr),
1256 &match, NETDEV_RULE_PRIORITY);
1257 fat_rwlock_wrlock(&dp->cls.rwlock);
1258 classifier_insert(&dp->cls,
1259 CONST_CAST(struct cls_rule *, &netdev_flow->cr));
1260 hmap_insert(&dp->flow_table,
1261 CONST_CAST(struct hmap_node *, &netdev_flow->node),
1262 flow_hash(flow, 0));
1263 fat_rwlock_unlock(&dp->cls.rwlock);
1269 clear_stats(struct dp_netdev_flow *netdev_flow)
1271 struct dp_netdev_flow_stats *bucket;
1274 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
1275 ovs_mutex_lock(&bucket->mutex);
1277 bucket->packet_count = 0;
1278 bucket->byte_count = 0;
1279 bucket->tcp_flags = 0;
1280 ovs_mutex_unlock(&bucket->mutex);
1285 dpif_netdev_flow_put(struct dpif *dpif, const struct dpif_flow_put *put)
1287 struct dp_netdev *dp = get_dp_netdev(dpif);
1288 struct dp_netdev_flow *netdev_flow;
1290 struct miniflow miniflow;
1291 struct flow_wildcards wc;
1294 error = dpif_netdev_flow_from_nlattrs(put->key, put->key_len, &flow);
1298 error = dpif_netdev_mask_from_nlattrs(put->key, put->key_len,
1299 put->mask, put->mask_len,
1304 miniflow_init(&miniflow, &flow);
1306 ovs_mutex_lock(&dp->flow_mutex);
1307 netdev_flow = dp_netdev_lookup_flow(dp, &miniflow);
1309 if (put->flags & DPIF_FP_CREATE) {
1310 if (hmap_count(&dp->flow_table) < MAX_FLOWS) {
1312 memset(put->stats, 0, sizeof *put->stats);
1314 error = dp_netdev_flow_add(dp, &flow, &wc, put->actions,
1323 if (put->flags & DPIF_FP_MODIFY
1324 && flow_equal(&flow, &netdev_flow->flow)) {
1325 struct dp_netdev_actions *new_actions;
1326 struct dp_netdev_actions *old_actions;
1328 new_actions = dp_netdev_actions_create(put->actions,
1331 old_actions = dp_netdev_flow_get_actions(netdev_flow);
1332 ovsrcu_set(&netdev_flow->actions, new_actions);
1335 get_dpif_flow_stats(netdev_flow, put->stats);
1337 if (put->flags & DPIF_FP_ZERO_STATS) {
1338 clear_stats(netdev_flow);
1341 ovsrcu_postpone(dp_netdev_actions_free, old_actions);
1342 } else if (put->flags & DPIF_FP_CREATE) {
1345 /* Overlapping flow. */
1349 ovs_mutex_unlock(&dp->flow_mutex);
1355 dpif_netdev_flow_del(struct dpif *dpif, const struct dpif_flow_del *del)
1357 struct dp_netdev *dp = get_dp_netdev(dpif);
1358 struct dp_netdev_flow *netdev_flow;
1362 error = dpif_netdev_flow_from_nlattrs(del->key, del->key_len, &key);
1367 ovs_mutex_lock(&dp->flow_mutex);
1368 fat_rwlock_wrlock(&dp->cls.rwlock);
1369 netdev_flow = dp_netdev_find_flow(dp, &key);
1372 get_dpif_flow_stats(netdev_flow, del->stats);
1374 dp_netdev_remove_flow(dp, netdev_flow);
1378 fat_rwlock_unlock(&dp->cls.rwlock);
1379 ovs_mutex_unlock(&dp->flow_mutex);
1384 struct dpif_netdev_flow_dump {
1385 struct dpif_flow_dump up;
1389 struct ovs_mutex mutex;
1392 static struct dpif_netdev_flow_dump *
1393 dpif_netdev_flow_dump_cast(struct dpif_flow_dump *dump)
1395 return CONTAINER_OF(dump, struct dpif_netdev_flow_dump, up);
1398 static struct dpif_flow_dump *
1399 dpif_netdev_flow_dump_create(const struct dpif *dpif_)
1401 struct dpif_netdev_flow_dump *dump;
1403 dump = xmalloc(sizeof *dump);
1404 dpif_flow_dump_init(&dump->up, dpif_);
1408 ovs_mutex_init(&dump->mutex);
1414 dpif_netdev_flow_dump_destroy(struct dpif_flow_dump *dump_)
1416 struct dpif_netdev_flow_dump *dump = dpif_netdev_flow_dump_cast(dump_);
1418 ovs_mutex_destroy(&dump->mutex);
1423 struct dpif_netdev_flow_dump_thread {
1424 struct dpif_flow_dump_thread up;
1425 struct dpif_netdev_flow_dump *dump;
1426 struct odputil_keybuf keybuf;
1427 struct odputil_keybuf maskbuf;
1430 static struct dpif_netdev_flow_dump_thread *
1431 dpif_netdev_flow_dump_thread_cast(struct dpif_flow_dump_thread *thread)
1433 return CONTAINER_OF(thread, struct dpif_netdev_flow_dump_thread, up);
1436 static struct dpif_flow_dump_thread *
1437 dpif_netdev_flow_dump_thread_create(struct dpif_flow_dump *dump_)
1439 struct dpif_netdev_flow_dump *dump = dpif_netdev_flow_dump_cast(dump_);
1440 struct dpif_netdev_flow_dump_thread *thread;
1442 thread = xmalloc(sizeof *thread);
1443 dpif_flow_dump_thread_init(&thread->up, &dump->up);
1444 thread->dump = dump;
1449 dpif_netdev_flow_dump_thread_destroy(struct dpif_flow_dump_thread *thread_)
1451 struct dpif_netdev_flow_dump_thread *thread
1452 = dpif_netdev_flow_dump_thread_cast(thread_);
1457 /* XXX the caller must use 'actions' without quiescing */
1459 dpif_netdev_flow_dump_next(struct dpif_flow_dump_thread *thread_,
1460 struct dpif_flow *f, int max_flows OVS_UNUSED)
1462 struct dpif_netdev_flow_dump_thread *thread
1463 = dpif_netdev_flow_dump_thread_cast(thread_);
1464 struct dpif_netdev_flow_dump *dump = thread->dump;
1465 struct dpif_netdev *dpif = dpif_netdev_cast(thread->up.dpif);
1466 struct dp_netdev *dp = get_dp_netdev(&dpif->dpif);
1467 struct dp_netdev_flow *netdev_flow;
1468 struct flow_wildcards wc;
1469 struct dp_netdev_actions *dp_actions;
1473 ovs_mutex_lock(&dump->mutex);
1474 error = dump->status;
1476 struct hmap_node *node;
1478 fat_rwlock_rdlock(&dp->cls.rwlock);
1479 node = hmap_at_position(&dp->flow_table, &dump->bucket, &dump->offset);
1481 netdev_flow = CONTAINER_OF(node, struct dp_netdev_flow, node);
1483 fat_rwlock_unlock(&dp->cls.rwlock);
1485 dump->status = error = EOF;
1488 ovs_mutex_unlock(&dump->mutex);
1493 minimask_expand(&netdev_flow->cr.match.mask, &wc);
1496 ofpbuf_use_stack(&buf, &thread->keybuf, sizeof thread->keybuf);
1497 odp_flow_key_from_flow(&buf, &netdev_flow->flow, &wc.masks,
1498 netdev_flow->flow.in_port.odp_port, true);
1499 f->key = ofpbuf_data(&buf);
1500 f->key_len = ofpbuf_size(&buf);
1503 ofpbuf_use_stack(&buf, &thread->maskbuf, sizeof thread->maskbuf);
1504 odp_flow_key_from_mask(&buf, &wc.masks, &netdev_flow->flow,
1505 odp_to_u32(wc.masks.in_port.odp_port),
1507 f->mask = ofpbuf_data(&buf);
1508 f->mask_len = ofpbuf_size(&buf);
1511 dp_actions = dp_netdev_flow_get_actions(netdev_flow);
1512 f->actions = dp_actions->actions;
1513 f->actions_len = dp_actions->size;
1516 get_dpif_flow_stats(netdev_flow, &f->stats);
1522 dpif_netdev_execute(struct dpif *dpif, struct dpif_execute *execute)
1524 struct dp_netdev *dp = get_dp_netdev(dpif);
1525 struct pkt_metadata *md = &execute->md;
1527 struct miniflow flow;
1528 uint32_t buf[FLOW_U32S];
1531 if (ofpbuf_size(execute->packet) < ETH_HEADER_LEN ||
1532 ofpbuf_size(execute->packet) > UINT16_MAX) {
1536 /* Extract flow key. */
1537 miniflow_initialize(&key.flow, key.buf);
1538 miniflow_extract(execute->packet, md, &key.flow);
1540 dp_netdev_execute_actions(dp, &key.flow, execute->packet, false, md,
1541 execute->actions, execute->actions_len);
1547 dp_netdev_destroy_all_queues(struct dp_netdev *dp)
1548 OVS_REQ_WRLOCK(dp->queue_rwlock)
1552 dp_netdev_purge_queues(dp);
1554 for (i = 0; i < dp->n_handlers; i++) {
1555 struct dp_netdev_queue *q = &dp->handler_queues[i];
1557 ovs_mutex_destroy(&q->mutex);
1558 seq_destroy(q->seq);
1560 free(dp->handler_queues);
1561 dp->handler_queues = NULL;
1566 dp_netdev_refresh_queues(struct dp_netdev *dp, uint32_t n_handlers)
1567 OVS_REQ_WRLOCK(dp->queue_rwlock)
1569 if (dp->n_handlers != n_handlers) {
1572 dp_netdev_destroy_all_queues(dp);
1574 dp->n_handlers = n_handlers;
1575 dp->handler_queues = xzalloc(n_handlers * sizeof *dp->handler_queues);
1577 for (i = 0; i < n_handlers; i++) {
1578 struct dp_netdev_queue *q = &dp->handler_queues[i];
1580 ovs_mutex_init(&q->mutex);
1581 q->seq = seq_create();
1587 dpif_netdev_recv_set(struct dpif *dpif, bool enable)
1589 struct dp_netdev *dp = get_dp_netdev(dpif);
1591 if ((dp->handler_queues != NULL) == enable) {
1595 fat_rwlock_wrlock(&dp->queue_rwlock);
1597 dp_netdev_destroy_all_queues(dp);
1599 dp_netdev_refresh_queues(dp, 1);
1601 fat_rwlock_unlock(&dp->queue_rwlock);
1607 dpif_netdev_handlers_set(struct dpif *dpif, uint32_t n_handlers)
1609 struct dp_netdev *dp = get_dp_netdev(dpif);
1611 fat_rwlock_wrlock(&dp->queue_rwlock);
1612 if (dp->handler_queues) {
1613 dp_netdev_refresh_queues(dp, n_handlers);
1615 fat_rwlock_unlock(&dp->queue_rwlock);
1621 dpif_netdev_queue_to_priority(const struct dpif *dpif OVS_UNUSED,
1622 uint32_t queue_id, uint32_t *priority)
1624 *priority = queue_id;
1629 dp_netdev_recv_check(const struct dp_netdev *dp, const uint32_t handler_id)
1630 OVS_REQ_RDLOCK(dp->queue_rwlock)
1632 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1634 if (!dp->handler_queues) {
1635 VLOG_WARN_RL(&rl, "receiving upcall disabled");
1639 if (handler_id >= dp->n_handlers) {
1640 VLOG_WARN_RL(&rl, "handler index out of bound");
1648 dpif_netdev_recv(struct dpif *dpif, uint32_t handler_id,
1649 struct dpif_upcall *upcall, struct ofpbuf *buf)
1651 struct dp_netdev *dp = get_dp_netdev(dpif);
1652 struct dp_netdev_queue *q;
1655 fat_rwlock_rdlock(&dp->queue_rwlock);
1657 if (!dp_netdev_recv_check(dp, handler_id)) {
1662 q = &dp->handler_queues[handler_id];
1663 ovs_mutex_lock(&q->mutex);
1664 if (q->head != q->tail) {
1665 struct dp_netdev_upcall *u = &q->upcalls[q->tail++ & QUEUE_MASK];
1667 *upcall = u->upcall;
1674 ovs_mutex_unlock(&q->mutex);
1677 fat_rwlock_unlock(&dp->queue_rwlock);
1683 dpif_netdev_recv_wait(struct dpif *dpif, uint32_t handler_id)
1685 struct dp_netdev *dp = get_dp_netdev(dpif);
1686 struct dp_netdev_queue *q;
1689 fat_rwlock_rdlock(&dp->queue_rwlock);
1691 if (!dp_netdev_recv_check(dp, handler_id)) {
1695 q = &dp->handler_queues[handler_id];
1696 ovs_mutex_lock(&q->mutex);
1697 seq = seq_read(q->seq);
1698 if (q->head != q->tail) {
1699 poll_immediate_wake();
1701 seq_wait(q->seq, seq);
1704 ovs_mutex_unlock(&q->mutex);
1707 fat_rwlock_unlock(&dp->queue_rwlock);
1711 dpif_netdev_recv_purge(struct dpif *dpif)
1713 struct dpif_netdev *dpif_netdev = dpif_netdev_cast(dpif);
1715 fat_rwlock_wrlock(&dpif_netdev->dp->queue_rwlock);
1716 dp_netdev_purge_queues(dpif_netdev->dp);
1717 fat_rwlock_unlock(&dpif_netdev->dp->queue_rwlock);
1720 /* Creates and returns a new 'struct dp_netdev_actions', with a reference count
1721 * of 1, whose actions are a copy of from the 'ofpacts_len' bytes of
1723 struct dp_netdev_actions *
1724 dp_netdev_actions_create(const struct nlattr *actions, size_t size)
1726 struct dp_netdev_actions *netdev_actions;
1728 netdev_actions = xmalloc(sizeof *netdev_actions);
1729 netdev_actions->actions = xmemdup(actions, size);
1730 netdev_actions->size = size;
1732 return netdev_actions;
1735 struct dp_netdev_actions *
1736 dp_netdev_flow_get_actions(const struct dp_netdev_flow *flow)
1738 return ovsrcu_get(struct dp_netdev_actions *, &flow->actions);
1742 dp_netdev_actions_free(struct dp_netdev_actions *actions)
1744 free(actions->actions);
1750 dp_netdev_process_rxq_port(struct dp_netdev *dp,
1751 struct dp_netdev_port *port,
1752 struct netdev_rxq *rxq)
1754 struct ofpbuf *packet[NETDEV_MAX_RX_BATCH];
1757 error = netdev_rxq_recv(rxq, packet, &c);
1759 struct pkt_metadata md = PKT_METADATA_INITIALIZER(port->port_no);
1762 for (i = 0; i < c; i++) {
1763 dp_netdev_port_input(dp, packet[i], &md);
1765 } else if (error != EAGAIN && error != EOPNOTSUPP) {
1766 static struct vlog_rate_limit rl
1767 = VLOG_RATE_LIMIT_INIT(1, 5);
1769 VLOG_ERR_RL(&rl, "error receiving data from %s: %s",
1770 netdev_get_name(port->netdev),
1771 ovs_strerror(error));
1776 dpif_netdev_run(struct dpif *dpif)
1778 struct dp_netdev_port *port;
1779 struct dp_netdev *dp = get_dp_netdev(dpif);
1781 CMAP_FOR_EACH (port, node, &dp->ports) {
1782 if (!netdev_is_pmd(port->netdev)) {
1785 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
1786 dp_netdev_process_rxq_port(dp, port, port->rxq[i]);
1793 dpif_netdev_wait(struct dpif *dpif)
1795 struct dp_netdev_port *port;
1796 struct dp_netdev *dp = get_dp_netdev(dpif);
1798 ovs_mutex_lock(&dp_netdev_mutex);
1799 CMAP_FOR_EACH (port, node, &dp->ports) {
1800 if (!netdev_is_pmd(port->netdev)) {
1803 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
1804 netdev_rxq_wait(port->rxq[i]);
1808 ovs_mutex_unlock(&dp_netdev_mutex);
1812 struct dp_netdev_port *port;
1813 struct netdev_rxq *rx;
1817 pmd_load_queues(struct pmd_thread *f,
1818 struct rxq_poll **ppoll_list, int poll_cnt)
1820 struct dp_netdev *dp = f->dp;
1821 struct rxq_poll *poll_list = *ppoll_list;
1822 struct dp_netdev_port *port;
1827 /* Simple scheduler for netdev rx polling. */
1828 for (i = 0; i < poll_cnt; i++) {
1829 port_unref(poll_list[i].port);
1835 CMAP_FOR_EACH (port, node, &f->dp->ports) {
1836 if (netdev_is_pmd(port->netdev)) {
1839 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
1840 if ((index % dp->n_pmd_threads) == id) {
1841 poll_list = xrealloc(poll_list, sizeof *poll_list * (poll_cnt + 1));
1844 poll_list[poll_cnt].port = port;
1845 poll_list[poll_cnt].rx = port->rxq[i];
1853 *ppoll_list = poll_list;
1858 pmd_thread_main(void *f_)
1860 struct pmd_thread *f = f_;
1861 struct dp_netdev *dp = f->dp;
1862 unsigned int lc = 0;
1863 struct rxq_poll *poll_list;
1864 unsigned int port_seq;
1871 pmd_thread_setaffinity_cpu(f->id);
1873 poll_cnt = pmd_load_queues(f, &poll_list, poll_cnt);
1874 atomic_read(&f->change_seq, &port_seq);
1877 unsigned int c_port_seq;
1880 for (i = 0; i < poll_cnt; i++) {
1881 dp_netdev_process_rxq_port(dp, poll_list[i].port, poll_list[i].rx);
1887 /* TODO: need completely userspace based signaling method.
1888 * to keep this thread entirely in userspace.
1889 * For now using atomic counter. */
1891 atomic_read_explicit(&f->change_seq, &c_port_seq, memory_order_consume);
1892 if (c_port_seq != port_seq) {
1898 if (!latch_is_set(&f->dp->exit_latch)){
1902 for (i = 0; i < poll_cnt; i++) {
1903 port_unref(poll_list[i].port);
1911 dp_netdev_set_pmd_threads(struct dp_netdev *dp, int n)
1915 if (n == dp->n_pmd_threads) {
1919 /* Stop existing threads. */
1920 latch_set(&dp->exit_latch);
1921 dp_netdev_reload_pmd_threads(dp);
1922 for (i = 0; i < dp->n_pmd_threads; i++) {
1923 struct pmd_thread *f = &dp->pmd_threads[i];
1925 xpthread_join(f->thread, NULL);
1927 latch_poll(&dp->exit_latch);
1928 free(dp->pmd_threads);
1930 /* Start new threads. */
1931 dp->pmd_threads = xmalloc(n * sizeof *dp->pmd_threads);
1932 dp->n_pmd_threads = n;
1934 for (i = 0; i < n; i++) {
1935 struct pmd_thread *f = &dp->pmd_threads[i];
1939 atomic_store(&f->change_seq, 1);
1941 /* Each thread will distribute all devices rx-queues among
1943 f->thread = ovs_thread_create("pmd", pmd_thread_main, f);
1949 dp_netdev_flow_stats_new_cb(void)
1951 struct dp_netdev_flow_stats *bucket = xzalloc_cacheline(sizeof *bucket);
1952 ovs_mutex_init(&bucket->mutex);
1957 dp_netdev_flow_used(struct dp_netdev_flow *netdev_flow,
1958 const struct ofpbuf *packet,
1959 const struct miniflow *key)
1961 uint16_t tcp_flags = miniflow_get_tcp_flags(key);
1962 long long int now = time_msec();
1963 struct dp_netdev_flow_stats *bucket;
1965 bucket = ovsthread_stats_bucket_get(&netdev_flow->stats,
1966 dp_netdev_flow_stats_new_cb);
1968 ovs_mutex_lock(&bucket->mutex);
1969 bucket->used = MAX(now, bucket->used);
1970 bucket->packet_count++;
1971 bucket->byte_count += ofpbuf_size(packet);
1972 bucket->tcp_flags |= tcp_flags;
1973 ovs_mutex_unlock(&bucket->mutex);
1977 dp_netdev_stats_new_cb(void)
1979 struct dp_netdev_stats *bucket = xzalloc_cacheline(sizeof *bucket);
1980 ovs_mutex_init(&bucket->mutex);
1985 dp_netdev_count_packet(struct dp_netdev *dp, enum dp_stat_type type)
1987 struct dp_netdev_stats *bucket;
1989 bucket = ovsthread_stats_bucket_get(&dp->stats, dp_netdev_stats_new_cb);
1990 ovs_mutex_lock(&bucket->mutex);
1992 ovs_mutex_unlock(&bucket->mutex);
1996 dp_netdev_input(struct dp_netdev *dp, struct ofpbuf *packet,
1997 struct pkt_metadata *md)
1999 struct dp_netdev_flow *netdev_flow;
2001 struct miniflow flow;
2002 uint32_t buf[FLOW_U32S];
2005 if (ofpbuf_size(packet) < ETH_HEADER_LEN) {
2006 ofpbuf_delete(packet);
2009 miniflow_initialize(&key.flow, key.buf);
2010 miniflow_extract(packet, md, &key.flow);
2012 netdev_flow = dp_netdev_lookup_flow(dp, &key.flow);
2014 struct dp_netdev_actions *actions;
2016 dp_netdev_flow_used(netdev_flow, packet, &key.flow);
2018 actions = dp_netdev_flow_get_actions(netdev_flow);
2019 dp_netdev_execute_actions(dp, &key.flow, packet, true, md,
2020 actions->actions, actions->size);
2021 dp_netdev_count_packet(dp, DP_STAT_HIT);
2022 } else if (dp->handler_queues) {
2023 dp_netdev_count_packet(dp, DP_STAT_MISS);
2024 dp_netdev_output_userspace(dp, packet,
2025 miniflow_hash_5tuple(&key.flow, 0)
2027 DPIF_UC_MISS, &key.flow, NULL);
2032 dp_netdev_port_input(struct dp_netdev *dp, struct ofpbuf *packet,
2033 struct pkt_metadata *md)
2035 uint32_t *recirc_depth = recirc_depth_get();
2038 dp_netdev_input(dp, packet, md);
2042 dp_netdev_output_userspace(struct dp_netdev *dp, struct ofpbuf *packet,
2043 int queue_no, int type, const struct miniflow *key,
2044 const struct nlattr *userdata)
2046 struct dp_netdev_queue *q;
2049 fat_rwlock_rdlock(&dp->queue_rwlock);
2050 q = &dp->handler_queues[queue_no];
2051 ovs_mutex_lock(&q->mutex);
2052 if (q->head - q->tail < MAX_QUEUE_LEN) {
2053 struct dp_netdev_upcall *u = &q->upcalls[q->head++ & QUEUE_MASK];
2054 struct dpif_upcall *upcall = &u->upcall;
2055 struct ofpbuf *buf = &u->buf;
2059 upcall->type = type;
2061 /* Allocate buffer big enough for everything. */
2062 buf_size = ODPUTIL_FLOW_KEY_BYTES;
2064 buf_size += NLA_ALIGN(userdata->nla_len);
2066 ofpbuf_init(buf, buf_size);
2069 miniflow_expand(key, &flow);
2070 odp_flow_key_from_flow(buf, &flow, NULL, flow.in_port.odp_port, true);
2071 upcall->key = ofpbuf_data(buf);
2072 upcall->key_len = ofpbuf_size(buf);
2076 upcall->userdata = ofpbuf_put(buf, userdata,
2077 NLA_ALIGN(userdata->nla_len));
2080 upcall->packet = *packet;
2086 dp_netdev_count_packet(dp, DP_STAT_LOST);
2087 ofpbuf_delete(packet);
2090 ovs_mutex_unlock(&q->mutex);
2091 fat_rwlock_unlock(&dp->queue_rwlock);
2096 struct dp_netdev_execute_aux {
2097 struct dp_netdev *dp;
2098 const struct miniflow *key;
2102 dp_execute_cb(void *aux_, struct ofpbuf *packet,
2103 struct pkt_metadata *md,
2104 const struct nlattr *a, bool may_steal)
2105 OVS_NO_THREAD_SAFETY_ANALYSIS
2107 struct dp_netdev_execute_aux *aux = aux_;
2108 int type = nl_attr_type(a);
2109 struct dp_netdev_port *p;
2110 uint32_t *depth = recirc_depth_get();
2112 switch ((enum ovs_action_attr)type) {
2113 case OVS_ACTION_ATTR_OUTPUT:
2114 p = dp_netdev_lookup_port(aux->dp, u32_to_odp(nl_attr_get_u32(a)));
2116 netdev_send(p->netdev, packet, may_steal);
2120 case OVS_ACTION_ATTR_USERSPACE: {
2121 struct ofpbuf *userspace_packet;
2122 const struct nlattr *userdata;
2124 userdata = nl_attr_find_nested(a, OVS_USERSPACE_ATTR_USERDATA);
2125 userspace_packet = may_steal ? packet : ofpbuf_clone(packet);
2127 dp_netdev_output_userspace(aux->dp, userspace_packet,
2128 miniflow_hash_5tuple(aux->key, 0)
2129 % aux->dp->n_handlers,
2130 DPIF_UC_ACTION, aux->key,
2135 case OVS_ACTION_ATTR_HASH: {
2136 const struct ovs_action_hash *hash_act;
2139 hash_act = nl_attr_get(a);
2140 if (hash_act->hash_alg == OVS_HASH_ALG_L4) {
2141 /* Hash need not be symmetric, nor does it need to include
2143 hash = miniflow_hash_5tuple(aux->key, hash_act->hash_basis);
2145 hash = 1; /* 0 is not valid */
2149 VLOG_WARN("Unknown hash algorithm specified for the hash action.");
2157 case OVS_ACTION_ATTR_RECIRC:
2158 if (*depth < MAX_RECIRC_DEPTH) {
2159 struct pkt_metadata recirc_md = *md;
2160 struct ofpbuf *recirc_packet;
2162 recirc_packet = may_steal ? packet : ofpbuf_clone(packet);
2163 recirc_md.recirc_id = nl_attr_get_u32(a);
2166 dp_netdev_input(aux->dp, recirc_packet, &recirc_md);
2171 VLOG_WARN("Packet dropped. Max recirculation depth exceeded.");
2175 case OVS_ACTION_ATTR_PUSH_VLAN:
2176 case OVS_ACTION_ATTR_POP_VLAN:
2177 case OVS_ACTION_ATTR_PUSH_MPLS:
2178 case OVS_ACTION_ATTR_POP_MPLS:
2179 case OVS_ACTION_ATTR_SET:
2180 case OVS_ACTION_ATTR_SAMPLE:
2181 case OVS_ACTION_ATTR_UNSPEC:
2182 case __OVS_ACTION_ATTR_MAX:
2188 dp_netdev_execute_actions(struct dp_netdev *dp, const struct miniflow *key,
2189 struct ofpbuf *packet, bool may_steal,
2190 struct pkt_metadata *md,
2191 const struct nlattr *actions, size_t actions_len)
2193 struct dp_netdev_execute_aux aux = {dp, key};
2195 odp_execute_actions(&aux, packet, may_steal, md,
2196 actions, actions_len, dp_execute_cb);
2199 const struct dpif_class dpif_netdev_class = {
2201 dpif_netdev_enumerate,
2202 dpif_netdev_port_open_type,
2205 dpif_netdev_destroy,
2208 dpif_netdev_get_stats,
2209 dpif_netdev_port_add,
2210 dpif_netdev_port_del,
2211 dpif_netdev_port_query_by_number,
2212 dpif_netdev_port_query_by_name,
2213 NULL, /* port_get_pid */
2214 dpif_netdev_port_dump_start,
2215 dpif_netdev_port_dump_next,
2216 dpif_netdev_port_dump_done,
2217 dpif_netdev_port_poll,
2218 dpif_netdev_port_poll_wait,
2219 dpif_netdev_flow_get,
2220 dpif_netdev_flow_put,
2221 dpif_netdev_flow_del,
2222 dpif_netdev_flow_flush,
2223 dpif_netdev_flow_dump_create,
2224 dpif_netdev_flow_dump_destroy,
2225 dpif_netdev_flow_dump_thread_create,
2226 dpif_netdev_flow_dump_thread_destroy,
2227 dpif_netdev_flow_dump_next,
2228 dpif_netdev_execute,
2230 dpif_netdev_recv_set,
2231 dpif_netdev_handlers_set,
2232 dpif_netdev_queue_to_priority,
2234 dpif_netdev_recv_wait,
2235 dpif_netdev_recv_purge,
2239 dpif_dummy_change_port_number(struct unixctl_conn *conn, int argc OVS_UNUSED,
2240 const char *argv[], void *aux OVS_UNUSED)
2242 struct dp_netdev_port *old_port;
2243 struct dp_netdev_port *new_port;
2244 struct dp_netdev *dp;
2247 ovs_mutex_lock(&dp_netdev_mutex);
2248 dp = shash_find_data(&dp_netdevs, argv[1]);
2249 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
2250 ovs_mutex_unlock(&dp_netdev_mutex);
2251 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
2254 ovs_refcount_ref(&dp->ref_cnt);
2255 ovs_mutex_unlock(&dp_netdev_mutex);
2257 ovs_mutex_lock(&dp->port_mutex);
2258 if (get_port_by_name(dp, argv[2], &old_port)) {
2259 unixctl_command_reply_error(conn, "unknown port");
2263 port_no = u32_to_odp(atoi(argv[3]));
2264 if (!port_no || port_no == ODPP_NONE) {
2265 unixctl_command_reply_error(conn, "bad port number");
2268 if (dp_netdev_lookup_port(dp, port_no)) {
2269 unixctl_command_reply_error(conn, "port number already in use");
2273 /* Remove old port. */
2274 cmap_remove(&dp->ports, &old_port->node, hash_port_no(old_port->port_no));
2275 ovsrcu_postpone(free, old_port);
2277 /* Insert new port (cmap semantics mean we cannot re-insert 'old_port'). */
2278 new_port = xmemdup(old_port, sizeof *old_port);
2279 new_port->port_no = port_no;
2280 cmap_insert(&dp->ports, &new_port->node, hash_port_no(port_no));
2282 seq_change(dp->port_seq);
2283 unixctl_command_reply(conn, NULL);
2286 ovs_mutex_unlock(&dp->port_mutex);
2287 dp_netdev_unref(dp);
2291 dpif_dummy_delete_port(struct unixctl_conn *conn, int argc OVS_UNUSED,
2292 const char *argv[], void *aux OVS_UNUSED)
2294 struct dp_netdev_port *port;
2295 struct dp_netdev *dp;
2297 ovs_mutex_lock(&dp_netdev_mutex);
2298 dp = shash_find_data(&dp_netdevs, argv[1]);
2299 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
2300 ovs_mutex_unlock(&dp_netdev_mutex);
2301 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
2304 ovs_refcount_ref(&dp->ref_cnt);
2305 ovs_mutex_unlock(&dp_netdev_mutex);
2307 ovs_mutex_lock(&dp->port_mutex);
2308 if (get_port_by_name(dp, argv[2], &port)) {
2309 unixctl_command_reply_error(conn, "unknown port");
2310 } else if (port->port_no == ODPP_LOCAL) {
2311 unixctl_command_reply_error(conn, "can't delete local port");
2313 do_del_port(dp, port);
2314 unixctl_command_reply(conn, NULL);
2316 ovs_mutex_unlock(&dp->port_mutex);
2318 dp_netdev_unref(dp);
2322 dpif_dummy_register__(const char *type)
2324 struct dpif_class *class;
2326 class = xmalloc(sizeof *class);
2327 *class = dpif_netdev_class;
2328 class->type = xstrdup(type);
2329 dp_register_provider(class);
2333 dpif_dummy_register(bool override)
2340 dp_enumerate_types(&types);
2341 SSET_FOR_EACH (type, &types) {
2342 if (!dp_unregister_provider(type)) {
2343 dpif_dummy_register__(type);
2346 sset_destroy(&types);
2349 dpif_dummy_register__("dummy");
2351 unixctl_command_register("dpif-dummy/change-port-number",
2352 "DP PORT NEW-NUMBER",
2353 3, 3, dpif_dummy_change_port_number, NULL);
2354 unixctl_command_register("dpif-dummy/delete-port", "DP PORT",
2355 2, 2, dpif_dummy_delete_port, NULL);