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)
365 struct shash_node *node;
367 ovs_mutex_lock(&dp_netdev_mutex);
368 SHASH_FOR_EACH(node, &dp_netdevs) {
369 sset_add(all_dps, node->name);
371 ovs_mutex_unlock(&dp_netdev_mutex);
377 dpif_netdev_class_is_dummy(const struct dpif_class *class)
379 return class != &dpif_netdev_class;
383 dpif_netdev_port_open_type(const struct dpif_class *class, const char *type)
385 return strcmp(type, "internal") ? type
386 : dpif_netdev_class_is_dummy(class) ? "dummy"
391 create_dpif_netdev(struct dp_netdev *dp)
393 uint16_t netflow_id = hash_string(dp->name, 0);
394 struct dpif_netdev *dpif;
396 ovs_refcount_ref(&dp->ref_cnt);
398 dpif = xmalloc(sizeof *dpif);
399 dpif_init(&dpif->dpif, dp->class, dp->name, netflow_id >> 8, netflow_id);
401 dpif->last_port_seq = seq_read(dp->port_seq);
406 /* Choose an unused, non-zero port number and return it on success.
407 * Return ODPP_NONE on failure. */
409 choose_port(struct dp_netdev *dp, const char *name)
410 OVS_REQUIRES(dp->port_mutex)
414 if (dp->class != &dpif_netdev_class) {
418 /* If the port name begins with "br", start the number search at
419 * 100 to make writing tests easier. */
420 if (!strncmp(name, "br", 2)) {
424 /* If the port name contains a number, try to assign that port number.
425 * This can make writing unit tests easier because port numbers are
427 for (p = name; *p != '\0'; p++) {
428 if (isdigit((unsigned char) *p)) {
429 port_no = start_no + strtol(p, NULL, 10);
430 if (port_no > 0 && port_no != odp_to_u32(ODPP_NONE)
431 && !dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
432 return u32_to_odp(port_no);
439 for (port_no = 1; port_no <= UINT16_MAX; port_no++) {
440 if (!dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
441 return u32_to_odp(port_no);
449 create_dp_netdev(const char *name, const struct dpif_class *class,
450 struct dp_netdev **dpp)
451 OVS_REQUIRES(dp_netdev_mutex)
453 struct dp_netdev *dp;
456 dp = xzalloc(sizeof *dp);
457 shash_add(&dp_netdevs, name, dp);
459 *CONST_CAST(const struct dpif_class **, &dp->class) = class;
460 *CONST_CAST(const char **, &dp->name) = xstrdup(name);
461 ovs_refcount_init(&dp->ref_cnt);
462 atomic_flag_clear(&dp->destroyed);
464 ovs_mutex_init(&dp->flow_mutex);
465 classifier_init(&dp->cls, NULL);
466 hmap_init(&dp->flow_table);
468 fat_rwlock_init(&dp->queue_rwlock);
470 ovsthread_stats_init(&dp->stats);
472 ovs_mutex_init(&dp->port_mutex);
473 cmap_init(&dp->ports);
474 dp->port_seq = seq_create();
475 latch_init(&dp->exit_latch);
477 ovs_mutex_lock(&dp->port_mutex);
478 error = do_add_port(dp, name, "internal", ODPP_LOCAL);
479 ovs_mutex_unlock(&dp->port_mutex);
490 dpif_netdev_open(const struct dpif_class *class, const char *name,
491 bool create, struct dpif **dpifp)
493 struct dp_netdev *dp;
496 ovs_mutex_lock(&dp_netdev_mutex);
497 dp = shash_find_data(&dp_netdevs, name);
499 error = create ? create_dp_netdev(name, class, &dp) : ENODEV;
501 error = (dp->class != class ? EINVAL
506 *dpifp = create_dpif_netdev(dp);
508 ovs_mutex_unlock(&dp_netdev_mutex);
514 dp_netdev_purge_queues(struct dp_netdev *dp)
515 OVS_REQ_WRLOCK(dp->queue_rwlock)
519 for (i = 0; i < dp->n_handlers; i++) {
520 struct dp_netdev_queue *q = &dp->handler_queues[i];
522 ovs_mutex_lock(&q->mutex);
523 while (q->tail != q->head) {
524 struct dp_netdev_upcall *u = &q->upcalls[q->tail++ & QUEUE_MASK];
525 ofpbuf_uninit(&u->upcall.packet);
526 ofpbuf_uninit(&u->buf);
528 ovs_mutex_unlock(&q->mutex);
532 /* Requires dp_netdev_mutex so that we can't get a new reference to 'dp'
533 * through the 'dp_netdevs' shash while freeing 'dp'. */
535 dp_netdev_free(struct dp_netdev *dp)
536 OVS_REQUIRES(dp_netdev_mutex)
538 struct dp_netdev_port *port;
539 struct dp_netdev_stats *bucket;
542 shash_find_and_delete(&dp_netdevs, dp->name);
544 dp_netdev_set_pmd_threads(dp, 0);
545 free(dp->pmd_threads);
547 dp_netdev_flow_flush(dp);
548 ovs_mutex_lock(&dp->port_mutex);
549 CMAP_FOR_EACH (port, node, &dp->ports) {
550 do_del_port(dp, port);
552 ovs_mutex_unlock(&dp->port_mutex);
554 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
555 ovs_mutex_destroy(&bucket->mutex);
556 free_cacheline(bucket);
558 ovsthread_stats_destroy(&dp->stats);
560 fat_rwlock_wrlock(&dp->queue_rwlock);
561 dp_netdev_destroy_all_queues(dp);
562 fat_rwlock_unlock(&dp->queue_rwlock);
564 fat_rwlock_destroy(&dp->queue_rwlock);
566 classifier_destroy(&dp->cls);
567 hmap_destroy(&dp->flow_table);
568 ovs_mutex_destroy(&dp->flow_mutex);
569 seq_destroy(dp->port_seq);
570 cmap_destroy(&dp->ports);
571 latch_destroy(&dp->exit_latch);
572 free(CONST_CAST(char *, dp->name));
577 dp_netdev_unref(struct dp_netdev *dp)
580 /* Take dp_netdev_mutex so that, if dp->ref_cnt falls to zero, we can't
581 * get a new reference to 'dp' through the 'dp_netdevs' shash. */
582 ovs_mutex_lock(&dp_netdev_mutex);
583 if (ovs_refcount_unref(&dp->ref_cnt) == 1) {
586 ovs_mutex_unlock(&dp_netdev_mutex);
591 dpif_netdev_close(struct dpif *dpif)
593 struct dp_netdev *dp = get_dp_netdev(dpif);
600 dpif_netdev_destroy(struct dpif *dpif)
602 struct dp_netdev *dp = get_dp_netdev(dpif);
604 if (!atomic_flag_test_and_set(&dp->destroyed)) {
605 if (ovs_refcount_unref(&dp->ref_cnt) == 1) {
606 /* Can't happen: 'dpif' still owns a reference to 'dp'. */
615 dpif_netdev_get_stats(const struct dpif *dpif, struct dpif_dp_stats *stats)
617 struct dp_netdev *dp = get_dp_netdev(dpif);
618 struct dp_netdev_stats *bucket;
621 fat_rwlock_rdlock(&dp->cls.rwlock);
622 stats->n_flows = hmap_count(&dp->flow_table);
623 fat_rwlock_unlock(&dp->cls.rwlock);
625 stats->n_hit = stats->n_missed = stats->n_lost = 0;
626 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
627 ovs_mutex_lock(&bucket->mutex);
628 stats->n_hit += bucket->n[DP_STAT_HIT];
629 stats->n_missed += bucket->n[DP_STAT_MISS];
630 stats->n_lost += bucket->n[DP_STAT_LOST];
631 ovs_mutex_unlock(&bucket->mutex);
633 stats->n_masks = UINT32_MAX;
634 stats->n_mask_hit = UINT64_MAX;
640 dp_netdev_reload_pmd_threads(struct dp_netdev *dp)
644 for (i = 0; i < dp->n_pmd_threads; i++) {
645 struct pmd_thread *f = &dp->pmd_threads[i];
648 atomic_add(&f->change_seq, 1, &id);
653 hash_port_no(odp_port_t port_no)
655 return hash_int(odp_to_u32(port_no), 0);
659 do_add_port(struct dp_netdev *dp, const char *devname, const char *type,
661 OVS_REQUIRES(dp->port_mutex)
663 struct netdev_saved_flags *sf;
664 struct dp_netdev_port *port;
665 struct netdev *netdev;
666 enum netdev_flags flags;
667 const char *open_type;
671 /* XXX reject devices already in some dp_netdev. */
673 /* Open and validate network device. */
674 open_type = dpif_netdev_port_open_type(dp->class, type);
675 error = netdev_open(devname, open_type, &netdev);
679 /* XXX reject non-Ethernet devices */
681 netdev_get_flags(netdev, &flags);
682 if (flags & NETDEV_LOOPBACK) {
683 VLOG_ERR("%s: cannot add a loopback device", devname);
684 netdev_close(netdev);
688 port = xzalloc(sizeof *port);
689 port->port_no = port_no;
690 port->netdev = netdev;
691 port->rxq = xmalloc(sizeof *port->rxq * netdev_n_rxq(netdev));
692 port->type = xstrdup(type);
693 for (i = 0; i < netdev_n_rxq(netdev); i++) {
694 error = netdev_rxq_open(netdev, &port->rxq[i], i);
696 && !(error == EOPNOTSUPP && dpif_netdev_class_is_dummy(dp->class))) {
697 VLOG_ERR("%s: cannot receive packets on this network device (%s)",
698 devname, ovs_strerror(errno));
699 netdev_close(netdev);
704 error = netdev_turn_flags_on(netdev, NETDEV_PROMISC, &sf);
706 for (i = 0; i < netdev_n_rxq(netdev); i++) {
707 netdev_rxq_close(port->rxq[i]);
709 netdev_close(netdev);
716 if (netdev_is_pmd(netdev)) {
718 dp_netdev_set_pmd_threads(dp, NR_THREADS);
719 dp_netdev_reload_pmd_threads(dp);
721 ovs_refcount_init(&port->ref_cnt);
723 cmap_insert(&dp->ports, &port->node, hash_port_no(port_no));
724 seq_change(dp->port_seq);
730 dpif_netdev_port_add(struct dpif *dpif, struct netdev *netdev,
731 odp_port_t *port_nop)
733 struct dp_netdev *dp = get_dp_netdev(dpif);
734 char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
735 const char *dpif_port;
739 ovs_mutex_lock(&dp->port_mutex);
740 dpif_port = netdev_vport_get_dpif_port(netdev, namebuf, sizeof namebuf);
741 if (*port_nop != ODPP_NONE) {
743 error = dp_netdev_lookup_port(dp, *port_nop) ? EBUSY : 0;
745 port_no = choose_port(dp, dpif_port);
746 error = port_no == ODPP_NONE ? EFBIG : 0;
750 error = do_add_port(dp, dpif_port, netdev_get_type(netdev), port_no);
752 ovs_mutex_unlock(&dp->port_mutex);
758 dpif_netdev_port_del(struct dpif *dpif, odp_port_t port_no)
760 struct dp_netdev *dp = get_dp_netdev(dpif);
763 ovs_mutex_lock(&dp->port_mutex);
764 if (port_no == ODPP_LOCAL) {
767 struct dp_netdev_port *port;
769 error = get_port_by_number(dp, port_no, &port);
771 do_del_port(dp, port);
774 ovs_mutex_unlock(&dp->port_mutex);
780 is_valid_port_number(odp_port_t port_no)
782 return port_no != ODPP_NONE;
785 static struct dp_netdev_port *
786 dp_netdev_lookup_port(const struct dp_netdev *dp, odp_port_t port_no)
788 struct dp_netdev_port *port;
790 CMAP_FOR_EACH_WITH_HASH (port, node, hash_port_no(port_no), &dp->ports) {
791 if (port->port_no == port_no) {
799 get_port_by_number(struct dp_netdev *dp,
800 odp_port_t port_no, struct dp_netdev_port **portp)
802 if (!is_valid_port_number(port_no)) {
806 *portp = dp_netdev_lookup_port(dp, port_no);
807 return *portp ? 0 : ENOENT;
812 port_ref(struct dp_netdev_port *port)
815 ovs_refcount_ref(&port->ref_cnt);
820 port_destroy__(struct dp_netdev_port *port)
822 int n_rxq = netdev_n_rxq(port->netdev);
825 netdev_close(port->netdev);
826 netdev_restore_flags(port->sf);
828 for (i = 0; i < n_rxq; i++) {
829 netdev_rxq_close(port->rxq[i]);
837 port_unref(struct dp_netdev_port *port)
839 if (port && ovs_refcount_unref(&port->ref_cnt) == 1) {
840 ovsrcu_postpone(port_destroy__, port);
845 get_port_by_name(struct dp_netdev *dp,
846 const char *devname, struct dp_netdev_port **portp)
847 OVS_REQUIRES(dp->port_mutex)
849 struct dp_netdev_port *port;
851 CMAP_FOR_EACH (port, node, &dp->ports) {
852 if (!strcmp(netdev_get_name(port->netdev), devname)) {
861 do_del_port(struct dp_netdev *dp, struct dp_netdev_port *port)
862 OVS_REQUIRES(dp->port_mutex)
864 cmap_remove(&dp->ports, &port->node, hash_odp_port(port->port_no));
865 seq_change(dp->port_seq);
866 if (netdev_is_pmd(port->netdev)) {
867 dp_netdev_reload_pmd_threads(dp);
874 answer_port_query(const struct dp_netdev_port *port,
875 struct dpif_port *dpif_port)
877 dpif_port->name = xstrdup(netdev_get_name(port->netdev));
878 dpif_port->type = xstrdup(port->type);
879 dpif_port->port_no = port->port_no;
883 dpif_netdev_port_query_by_number(const struct dpif *dpif, odp_port_t port_no,
884 struct dpif_port *dpif_port)
886 struct dp_netdev *dp = get_dp_netdev(dpif);
887 struct dp_netdev_port *port;
890 error = get_port_by_number(dp, port_no, &port);
891 if (!error && dpif_port) {
892 answer_port_query(port, dpif_port);
899 dpif_netdev_port_query_by_name(const struct dpif *dpif, const char *devname,
900 struct dpif_port *dpif_port)
902 struct dp_netdev *dp = get_dp_netdev(dpif);
903 struct dp_netdev_port *port;
906 ovs_mutex_lock(&dp->port_mutex);
907 error = get_port_by_name(dp, devname, &port);
908 if (!error && dpif_port) {
909 answer_port_query(port, dpif_port);
911 ovs_mutex_unlock(&dp->port_mutex);
917 dp_netdev_flow_free(struct dp_netdev_flow *flow)
919 struct dp_netdev_flow_stats *bucket;
922 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &flow->stats) {
923 ovs_mutex_destroy(&bucket->mutex);
924 free_cacheline(bucket);
926 ovsthread_stats_destroy(&flow->stats);
928 cls_rule_destroy(CONST_CAST(struct cls_rule *, &flow->cr));
929 dp_netdev_actions_free(dp_netdev_flow_get_actions(flow));
934 dp_netdev_remove_flow(struct dp_netdev *dp, struct dp_netdev_flow *flow)
935 OVS_REQ_WRLOCK(dp->cls.rwlock)
936 OVS_REQUIRES(dp->flow_mutex)
938 struct cls_rule *cr = CONST_CAST(struct cls_rule *, &flow->cr);
939 struct hmap_node *node = CONST_CAST(struct hmap_node *, &flow->node);
941 classifier_remove(&dp->cls, cr);
942 hmap_remove(&dp->flow_table, node);
943 ovsrcu_postpone(dp_netdev_flow_free, flow);
947 dp_netdev_flow_flush(struct dp_netdev *dp)
949 struct dp_netdev_flow *netdev_flow, *next;
951 ovs_mutex_lock(&dp->flow_mutex);
952 fat_rwlock_wrlock(&dp->cls.rwlock);
953 HMAP_FOR_EACH_SAFE (netdev_flow, next, node, &dp->flow_table) {
954 dp_netdev_remove_flow(dp, netdev_flow);
956 fat_rwlock_unlock(&dp->cls.rwlock);
957 ovs_mutex_unlock(&dp->flow_mutex);
961 dpif_netdev_flow_flush(struct dpif *dpif)
963 struct dp_netdev *dp = get_dp_netdev(dpif);
965 dp_netdev_flow_flush(dp);
969 struct dp_netdev_port_state {
970 struct cmap_position position;
975 dpif_netdev_port_dump_start(const struct dpif *dpif OVS_UNUSED, void **statep)
977 *statep = xzalloc(sizeof(struct dp_netdev_port_state));
982 dpif_netdev_port_dump_next(const struct dpif *dpif, void *state_,
983 struct dpif_port *dpif_port)
985 struct dp_netdev_port_state *state = state_;
986 struct dp_netdev *dp = get_dp_netdev(dpif);
987 struct cmap_node *node;
990 node = cmap_next_position(&dp->ports, &state->position);
992 struct dp_netdev_port *port;
994 port = CONTAINER_OF(node, struct dp_netdev_port, node);
997 state->name = xstrdup(netdev_get_name(port->netdev));
998 dpif_port->name = state->name;
999 dpif_port->type = port->type;
1000 dpif_port->port_no = port->port_no;
1011 dpif_netdev_port_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
1013 struct dp_netdev_port_state *state = state_;
1020 dpif_netdev_port_poll(const struct dpif *dpif_, char **devnamep OVS_UNUSED)
1022 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
1023 uint64_t new_port_seq;
1026 new_port_seq = seq_read(dpif->dp->port_seq);
1027 if (dpif->last_port_seq != new_port_seq) {
1028 dpif->last_port_seq = new_port_seq;
1038 dpif_netdev_port_poll_wait(const struct dpif *dpif_)
1040 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
1042 seq_wait(dpif->dp->port_seq, dpif->last_port_seq);
1045 static struct dp_netdev_flow *
1046 dp_netdev_flow_cast(const struct cls_rule *cr)
1048 return cr ? CONTAINER_OF(cr, struct dp_netdev_flow, cr) : NULL;
1051 static struct dp_netdev_flow *
1052 dp_netdev_lookup_flow(const struct dp_netdev *dp, const struct miniflow *key)
1053 OVS_EXCLUDED(dp->cls.rwlock)
1055 struct dp_netdev_flow *netdev_flow;
1056 struct cls_rule *rule;
1058 fat_rwlock_rdlock(&dp->cls.rwlock);
1059 rule = classifier_lookup_miniflow_first(&dp->cls, key);
1060 netdev_flow = dp_netdev_flow_cast(rule);
1061 fat_rwlock_unlock(&dp->cls.rwlock);
1066 static struct dp_netdev_flow *
1067 dp_netdev_find_flow(const struct dp_netdev *dp, const struct flow *flow)
1068 OVS_REQ_RDLOCK(dp->cls.rwlock)
1070 struct dp_netdev_flow *netdev_flow;
1072 HMAP_FOR_EACH_WITH_HASH (netdev_flow, node, flow_hash(flow, 0),
1074 if (flow_equal(&netdev_flow->flow, flow)) {
1083 get_dpif_flow_stats(struct dp_netdev_flow *netdev_flow,
1084 struct dpif_flow_stats *stats)
1086 struct dp_netdev_flow_stats *bucket;
1089 memset(stats, 0, sizeof *stats);
1090 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
1091 ovs_mutex_lock(&bucket->mutex);
1092 stats->n_packets += bucket->packet_count;
1093 stats->n_bytes += bucket->byte_count;
1094 stats->used = MAX(stats->used, bucket->used);
1095 stats->tcp_flags |= bucket->tcp_flags;
1096 ovs_mutex_unlock(&bucket->mutex);
1101 dpif_netdev_mask_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1102 const struct nlattr *mask_key,
1103 uint32_t mask_key_len, const struct flow *flow,
1107 enum odp_key_fitness fitness;
1109 fitness = odp_flow_key_to_mask(mask_key, mask_key_len, mask, flow);
1111 /* This should not happen: it indicates that
1112 * odp_flow_key_from_mask() and odp_flow_key_to_mask()
1113 * disagree on the acceptable form of a mask. Log the problem
1114 * as an error, with enough details to enable debugging. */
1115 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1117 if (!VLOG_DROP_ERR(&rl)) {
1121 odp_flow_format(key, key_len, mask_key, mask_key_len, NULL, &s,
1123 VLOG_ERR("internal error parsing flow mask %s (%s)",
1124 ds_cstr(&s), odp_key_fitness_to_string(fitness));
1131 enum mf_field_id id;
1132 /* No mask key, unwildcard everything except fields whose
1133 * prerequisities are not met. */
1134 memset(mask, 0x0, sizeof *mask);
1136 for (id = 0; id < MFF_N_IDS; ++id) {
1137 /* Skip registers and metadata. */
1138 if (!(id >= MFF_REG0 && id < MFF_REG0 + FLOW_N_REGS)
1139 && id != MFF_METADATA) {
1140 const struct mf_field *mf = mf_from_id(id);
1141 if (mf_are_prereqs_ok(mf, flow)) {
1142 mf_mask_field(mf, mask);
1148 /* Force unwildcard the in_port.
1150 * We need to do this even in the case where we unwildcard "everything"
1151 * above because "everything" only includes the 16-bit OpenFlow port number
1152 * mask->in_port.ofp_port, which only covers half of the 32-bit datapath
1153 * port number mask->in_port.odp_port. */
1154 mask->in_port.odp_port = u32_to_odp(UINT32_MAX);
1160 dpif_netdev_flow_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1165 if (odp_flow_key_to_flow(key, key_len, flow)) {
1166 /* This should not happen: it indicates that odp_flow_key_from_flow()
1167 * and odp_flow_key_to_flow() disagree on the acceptable form of a
1168 * flow. Log the problem as an error, with enough details to enable
1170 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1172 if (!VLOG_DROP_ERR(&rl)) {
1176 odp_flow_format(key, key_len, NULL, 0, NULL, &s, true);
1177 VLOG_ERR("internal error parsing flow key %s", ds_cstr(&s));
1184 in_port = flow->in_port.odp_port;
1185 if (!is_valid_port_number(in_port) && in_port != ODPP_NONE) {
1193 dpif_netdev_flow_get(const struct dpif *dpif,
1194 const struct nlattr *nl_key, size_t nl_key_len,
1195 struct ofpbuf **actionsp, struct dpif_flow_stats *stats)
1197 struct dp_netdev *dp = get_dp_netdev(dpif);
1198 struct dp_netdev_flow *netdev_flow;
1202 error = dpif_netdev_flow_from_nlattrs(nl_key, nl_key_len, &key);
1207 fat_rwlock_rdlock(&dp->cls.rwlock);
1208 netdev_flow = dp_netdev_find_flow(dp, &key);
1209 fat_rwlock_unlock(&dp->cls.rwlock);
1213 get_dpif_flow_stats(netdev_flow, stats);
1217 struct dp_netdev_actions *actions;
1219 actions = dp_netdev_flow_get_actions(netdev_flow);
1220 *actionsp = ofpbuf_clone_data(actions->actions, actions->size);
1230 dp_netdev_flow_add(struct dp_netdev *dp, const struct flow *flow,
1231 const struct flow_wildcards *wc,
1232 const struct nlattr *actions,
1234 OVS_REQUIRES(dp->flow_mutex)
1236 struct dp_netdev_flow *netdev_flow;
1239 netdev_flow = xzalloc(sizeof *netdev_flow);
1240 *CONST_CAST(struct flow *, &netdev_flow->flow) = *flow;
1242 ovsthread_stats_init(&netdev_flow->stats);
1244 ovsrcu_set(&netdev_flow->actions,
1245 dp_netdev_actions_create(actions, actions_len));
1247 match_init(&match, flow, wc);
1248 cls_rule_init(CONST_CAST(struct cls_rule *, &netdev_flow->cr),
1249 &match, NETDEV_RULE_PRIORITY);
1250 fat_rwlock_wrlock(&dp->cls.rwlock);
1251 classifier_insert(&dp->cls,
1252 CONST_CAST(struct cls_rule *, &netdev_flow->cr));
1253 hmap_insert(&dp->flow_table,
1254 CONST_CAST(struct hmap_node *, &netdev_flow->node),
1255 flow_hash(flow, 0));
1256 fat_rwlock_unlock(&dp->cls.rwlock);
1262 clear_stats(struct dp_netdev_flow *netdev_flow)
1264 struct dp_netdev_flow_stats *bucket;
1267 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
1268 ovs_mutex_lock(&bucket->mutex);
1270 bucket->packet_count = 0;
1271 bucket->byte_count = 0;
1272 bucket->tcp_flags = 0;
1273 ovs_mutex_unlock(&bucket->mutex);
1278 dpif_netdev_flow_put(struct dpif *dpif, const struct dpif_flow_put *put)
1280 struct dp_netdev *dp = get_dp_netdev(dpif);
1281 struct dp_netdev_flow *netdev_flow;
1283 struct miniflow miniflow;
1284 struct flow_wildcards wc;
1287 error = dpif_netdev_flow_from_nlattrs(put->key, put->key_len, &flow);
1291 error = dpif_netdev_mask_from_nlattrs(put->key, put->key_len,
1292 put->mask, put->mask_len,
1297 miniflow_init(&miniflow, &flow);
1299 ovs_mutex_lock(&dp->flow_mutex);
1300 netdev_flow = dp_netdev_lookup_flow(dp, &miniflow);
1302 if (put->flags & DPIF_FP_CREATE) {
1303 if (hmap_count(&dp->flow_table) < MAX_FLOWS) {
1305 memset(put->stats, 0, sizeof *put->stats);
1307 error = dp_netdev_flow_add(dp, &flow, &wc, put->actions,
1316 if (put->flags & DPIF_FP_MODIFY
1317 && flow_equal(&flow, &netdev_flow->flow)) {
1318 struct dp_netdev_actions *new_actions;
1319 struct dp_netdev_actions *old_actions;
1321 new_actions = dp_netdev_actions_create(put->actions,
1324 old_actions = dp_netdev_flow_get_actions(netdev_flow);
1325 ovsrcu_set(&netdev_flow->actions, new_actions);
1328 get_dpif_flow_stats(netdev_flow, put->stats);
1330 if (put->flags & DPIF_FP_ZERO_STATS) {
1331 clear_stats(netdev_flow);
1334 ovsrcu_postpone(dp_netdev_actions_free, old_actions);
1335 } else if (put->flags & DPIF_FP_CREATE) {
1338 /* Overlapping flow. */
1342 ovs_mutex_unlock(&dp->flow_mutex);
1348 dpif_netdev_flow_del(struct dpif *dpif, const struct dpif_flow_del *del)
1350 struct dp_netdev *dp = get_dp_netdev(dpif);
1351 struct dp_netdev_flow *netdev_flow;
1355 error = dpif_netdev_flow_from_nlattrs(del->key, del->key_len, &key);
1360 ovs_mutex_lock(&dp->flow_mutex);
1361 fat_rwlock_wrlock(&dp->cls.rwlock);
1362 netdev_flow = dp_netdev_find_flow(dp, &key);
1365 get_dpif_flow_stats(netdev_flow, del->stats);
1367 dp_netdev_remove_flow(dp, netdev_flow);
1371 fat_rwlock_unlock(&dp->cls.rwlock);
1372 ovs_mutex_unlock(&dp->flow_mutex);
1377 struct dpif_netdev_flow_dump {
1378 struct dpif_flow_dump up;
1382 struct ovs_mutex mutex;
1385 static struct dpif_netdev_flow_dump *
1386 dpif_netdev_flow_dump_cast(struct dpif_flow_dump *dump)
1388 return CONTAINER_OF(dump, struct dpif_netdev_flow_dump, up);
1391 static struct dpif_flow_dump *
1392 dpif_netdev_flow_dump_create(const struct dpif *dpif_)
1394 struct dpif_netdev_flow_dump *dump;
1396 dump = xmalloc(sizeof *dump);
1397 dpif_flow_dump_init(&dump->up, dpif_);
1401 ovs_mutex_init(&dump->mutex);
1407 dpif_netdev_flow_dump_destroy(struct dpif_flow_dump *dump_)
1409 struct dpif_netdev_flow_dump *dump = dpif_netdev_flow_dump_cast(dump_);
1411 ovs_mutex_destroy(&dump->mutex);
1416 struct dpif_netdev_flow_dump_thread {
1417 struct dpif_flow_dump_thread up;
1418 struct dpif_netdev_flow_dump *dump;
1419 struct odputil_keybuf keybuf;
1420 struct odputil_keybuf maskbuf;
1423 static struct dpif_netdev_flow_dump_thread *
1424 dpif_netdev_flow_dump_thread_cast(struct dpif_flow_dump_thread *thread)
1426 return CONTAINER_OF(thread, struct dpif_netdev_flow_dump_thread, up);
1429 static struct dpif_flow_dump_thread *
1430 dpif_netdev_flow_dump_thread_create(struct dpif_flow_dump *dump_)
1432 struct dpif_netdev_flow_dump *dump = dpif_netdev_flow_dump_cast(dump_);
1433 struct dpif_netdev_flow_dump_thread *thread;
1435 thread = xmalloc(sizeof *thread);
1436 dpif_flow_dump_thread_init(&thread->up, &dump->up);
1437 thread->dump = dump;
1442 dpif_netdev_flow_dump_thread_destroy(struct dpif_flow_dump_thread *thread_)
1444 struct dpif_netdev_flow_dump_thread *thread
1445 = dpif_netdev_flow_dump_thread_cast(thread_);
1450 /* XXX the caller must use 'actions' without quiescing */
1452 dpif_netdev_flow_dump_next(struct dpif_flow_dump_thread *thread_,
1453 struct dpif_flow *f, int max_flows OVS_UNUSED)
1455 struct dpif_netdev_flow_dump_thread *thread
1456 = dpif_netdev_flow_dump_thread_cast(thread_);
1457 struct dpif_netdev_flow_dump *dump = thread->dump;
1458 struct dpif_netdev *dpif = dpif_netdev_cast(thread->up.dpif);
1459 struct dp_netdev *dp = get_dp_netdev(&dpif->dpif);
1460 struct dp_netdev_flow *netdev_flow;
1461 struct flow_wildcards wc;
1462 struct dp_netdev_actions *dp_actions;
1466 ovs_mutex_lock(&dump->mutex);
1467 error = dump->status;
1469 struct hmap_node *node;
1471 fat_rwlock_rdlock(&dp->cls.rwlock);
1472 node = hmap_at_position(&dp->flow_table, &dump->bucket, &dump->offset);
1474 netdev_flow = CONTAINER_OF(node, struct dp_netdev_flow, node);
1476 fat_rwlock_unlock(&dp->cls.rwlock);
1478 dump->status = error = EOF;
1481 ovs_mutex_unlock(&dump->mutex);
1486 minimask_expand(&netdev_flow->cr.match.mask, &wc);
1489 ofpbuf_use_stack(&buf, &thread->keybuf, sizeof thread->keybuf);
1490 odp_flow_key_from_flow(&buf, &netdev_flow->flow, &wc.masks,
1491 netdev_flow->flow.in_port.odp_port, true);
1492 f->key = ofpbuf_data(&buf);
1493 f->key_len = ofpbuf_size(&buf);
1496 ofpbuf_use_stack(&buf, &thread->maskbuf, sizeof thread->maskbuf);
1497 odp_flow_key_from_mask(&buf, &wc.masks, &netdev_flow->flow,
1498 odp_to_u32(wc.masks.in_port.odp_port),
1500 f->mask = ofpbuf_data(&buf);
1501 f->mask_len = ofpbuf_size(&buf);
1504 dp_actions = dp_netdev_flow_get_actions(netdev_flow);
1505 f->actions = dp_actions->actions;
1506 f->actions_len = dp_actions->size;
1509 get_dpif_flow_stats(netdev_flow, &f->stats);
1515 dpif_netdev_execute(struct dpif *dpif, struct dpif_execute *execute)
1517 struct dp_netdev *dp = get_dp_netdev(dpif);
1518 struct pkt_metadata *md = &execute->md;
1520 struct miniflow flow;
1521 uint32_t buf[FLOW_U32S];
1524 if (ofpbuf_size(execute->packet) < ETH_HEADER_LEN ||
1525 ofpbuf_size(execute->packet) > UINT16_MAX) {
1529 /* Extract flow key. */
1530 miniflow_initialize(&key.flow, key.buf);
1531 miniflow_extract(execute->packet, md, &key.flow);
1533 dp_netdev_execute_actions(dp, &key.flow, execute->packet, false, md,
1534 execute->actions, execute->actions_len);
1540 dp_netdev_destroy_all_queues(struct dp_netdev *dp)
1541 OVS_REQ_WRLOCK(dp->queue_rwlock)
1545 dp_netdev_purge_queues(dp);
1547 for (i = 0; i < dp->n_handlers; i++) {
1548 struct dp_netdev_queue *q = &dp->handler_queues[i];
1550 ovs_mutex_destroy(&q->mutex);
1551 seq_destroy(q->seq);
1553 free(dp->handler_queues);
1554 dp->handler_queues = NULL;
1559 dp_netdev_refresh_queues(struct dp_netdev *dp, uint32_t n_handlers)
1560 OVS_REQ_WRLOCK(dp->queue_rwlock)
1562 if (dp->n_handlers != n_handlers) {
1565 dp_netdev_destroy_all_queues(dp);
1567 dp->n_handlers = n_handlers;
1568 dp->handler_queues = xzalloc(n_handlers * sizeof *dp->handler_queues);
1570 for (i = 0; i < n_handlers; i++) {
1571 struct dp_netdev_queue *q = &dp->handler_queues[i];
1573 ovs_mutex_init(&q->mutex);
1574 q->seq = seq_create();
1580 dpif_netdev_recv_set(struct dpif *dpif, bool enable)
1582 struct dp_netdev *dp = get_dp_netdev(dpif);
1584 if ((dp->handler_queues != NULL) == enable) {
1588 fat_rwlock_wrlock(&dp->queue_rwlock);
1590 dp_netdev_destroy_all_queues(dp);
1592 dp_netdev_refresh_queues(dp, 1);
1594 fat_rwlock_unlock(&dp->queue_rwlock);
1600 dpif_netdev_handlers_set(struct dpif *dpif, uint32_t n_handlers)
1602 struct dp_netdev *dp = get_dp_netdev(dpif);
1604 fat_rwlock_wrlock(&dp->queue_rwlock);
1605 if (dp->handler_queues) {
1606 dp_netdev_refresh_queues(dp, n_handlers);
1608 fat_rwlock_unlock(&dp->queue_rwlock);
1614 dpif_netdev_queue_to_priority(const struct dpif *dpif OVS_UNUSED,
1615 uint32_t queue_id, uint32_t *priority)
1617 *priority = queue_id;
1622 dp_netdev_recv_check(const struct dp_netdev *dp, const uint32_t handler_id)
1623 OVS_REQ_RDLOCK(dp->queue_rwlock)
1625 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1627 if (!dp->handler_queues) {
1628 VLOG_WARN_RL(&rl, "receiving upcall disabled");
1632 if (handler_id >= dp->n_handlers) {
1633 VLOG_WARN_RL(&rl, "handler index out of bound");
1641 dpif_netdev_recv(struct dpif *dpif, uint32_t handler_id,
1642 struct dpif_upcall *upcall, struct ofpbuf *buf)
1644 struct dp_netdev *dp = get_dp_netdev(dpif);
1645 struct dp_netdev_queue *q;
1648 fat_rwlock_rdlock(&dp->queue_rwlock);
1650 if (!dp_netdev_recv_check(dp, handler_id)) {
1655 q = &dp->handler_queues[handler_id];
1656 ovs_mutex_lock(&q->mutex);
1657 if (q->head != q->tail) {
1658 struct dp_netdev_upcall *u = &q->upcalls[q->tail++ & QUEUE_MASK];
1660 *upcall = u->upcall;
1667 ovs_mutex_unlock(&q->mutex);
1670 fat_rwlock_unlock(&dp->queue_rwlock);
1676 dpif_netdev_recv_wait(struct dpif *dpif, uint32_t handler_id)
1678 struct dp_netdev *dp = get_dp_netdev(dpif);
1679 struct dp_netdev_queue *q;
1682 fat_rwlock_rdlock(&dp->queue_rwlock);
1684 if (!dp_netdev_recv_check(dp, handler_id)) {
1688 q = &dp->handler_queues[handler_id];
1689 ovs_mutex_lock(&q->mutex);
1690 seq = seq_read(q->seq);
1691 if (q->head != q->tail) {
1692 poll_immediate_wake();
1694 seq_wait(q->seq, seq);
1697 ovs_mutex_unlock(&q->mutex);
1700 fat_rwlock_unlock(&dp->queue_rwlock);
1704 dpif_netdev_recv_purge(struct dpif *dpif)
1706 struct dpif_netdev *dpif_netdev = dpif_netdev_cast(dpif);
1708 fat_rwlock_wrlock(&dpif_netdev->dp->queue_rwlock);
1709 dp_netdev_purge_queues(dpif_netdev->dp);
1710 fat_rwlock_unlock(&dpif_netdev->dp->queue_rwlock);
1713 /* Creates and returns a new 'struct dp_netdev_actions', with a reference count
1714 * of 1, whose actions are a copy of from the 'ofpacts_len' bytes of
1716 struct dp_netdev_actions *
1717 dp_netdev_actions_create(const struct nlattr *actions, size_t size)
1719 struct dp_netdev_actions *netdev_actions;
1721 netdev_actions = xmalloc(sizeof *netdev_actions);
1722 netdev_actions->actions = xmemdup(actions, size);
1723 netdev_actions->size = size;
1725 return netdev_actions;
1728 struct dp_netdev_actions *
1729 dp_netdev_flow_get_actions(const struct dp_netdev_flow *flow)
1731 return ovsrcu_get(struct dp_netdev_actions *, &flow->actions);
1735 dp_netdev_actions_free(struct dp_netdev_actions *actions)
1737 free(actions->actions);
1743 dp_netdev_process_rxq_port(struct dp_netdev *dp,
1744 struct dp_netdev_port *port,
1745 struct netdev_rxq *rxq)
1747 struct ofpbuf *packet[NETDEV_MAX_RX_BATCH];
1750 error = netdev_rxq_recv(rxq, packet, &c);
1752 struct pkt_metadata md = PKT_METADATA_INITIALIZER(port->port_no);
1755 for (i = 0; i < c; i++) {
1756 dp_netdev_port_input(dp, packet[i], &md);
1758 } else if (error != EAGAIN && error != EOPNOTSUPP) {
1759 static struct vlog_rate_limit rl
1760 = VLOG_RATE_LIMIT_INIT(1, 5);
1762 VLOG_ERR_RL(&rl, "error receiving data from %s: %s",
1763 netdev_get_name(port->netdev),
1764 ovs_strerror(error));
1769 dpif_netdev_run(struct dpif *dpif)
1771 struct dp_netdev_port *port;
1772 struct dp_netdev *dp = get_dp_netdev(dpif);
1774 CMAP_FOR_EACH (port, node, &dp->ports) {
1775 if (!netdev_is_pmd(port->netdev)) {
1778 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
1779 dp_netdev_process_rxq_port(dp, port, port->rxq[i]);
1786 dpif_netdev_wait(struct dpif *dpif)
1788 struct dp_netdev_port *port;
1789 struct dp_netdev *dp = get_dp_netdev(dpif);
1791 ovs_mutex_lock(&dp_netdev_mutex);
1792 CMAP_FOR_EACH (port, node, &dp->ports) {
1793 if (!netdev_is_pmd(port->netdev)) {
1796 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
1797 netdev_rxq_wait(port->rxq[i]);
1801 ovs_mutex_unlock(&dp_netdev_mutex);
1805 struct dp_netdev_port *port;
1806 struct netdev_rxq *rx;
1810 pmd_load_queues(struct pmd_thread *f,
1811 struct rxq_poll **ppoll_list, int poll_cnt)
1813 struct dp_netdev *dp = f->dp;
1814 struct rxq_poll *poll_list = *ppoll_list;
1815 struct dp_netdev_port *port;
1820 /* Simple scheduler for netdev rx polling. */
1821 for (i = 0; i < poll_cnt; i++) {
1822 port_unref(poll_list[i].port);
1828 CMAP_FOR_EACH (port, node, &f->dp->ports) {
1829 if (netdev_is_pmd(port->netdev)) {
1832 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
1833 if ((index % dp->n_pmd_threads) == id) {
1834 poll_list = xrealloc(poll_list, sizeof *poll_list * (poll_cnt + 1));
1837 poll_list[poll_cnt].port = port;
1838 poll_list[poll_cnt].rx = port->rxq[i];
1846 *ppoll_list = poll_list;
1851 pmd_thread_main(void *f_)
1853 struct pmd_thread *f = f_;
1854 struct dp_netdev *dp = f->dp;
1855 unsigned int lc = 0;
1856 struct rxq_poll *poll_list;
1857 unsigned int port_seq;
1864 pmd_thread_setaffinity_cpu(f->id);
1866 poll_cnt = pmd_load_queues(f, &poll_list, poll_cnt);
1867 atomic_read(&f->change_seq, &port_seq);
1870 unsigned int c_port_seq;
1873 for (i = 0; i < poll_cnt; i++) {
1874 dp_netdev_process_rxq_port(dp, poll_list[i].port, poll_list[i].rx);
1880 /* TODO: need completely userspace based signaling method.
1881 * to keep this thread entirely in userspace.
1882 * For now using atomic counter. */
1884 atomic_read_explicit(&f->change_seq, &c_port_seq, memory_order_consume);
1885 if (c_port_seq != port_seq) {
1891 if (!latch_is_set(&f->dp->exit_latch)){
1895 for (i = 0; i < poll_cnt; i++) {
1896 port_unref(poll_list[i].port);
1904 dp_netdev_set_pmd_threads(struct dp_netdev *dp, int n)
1908 if (n == dp->n_pmd_threads) {
1912 /* Stop existing threads. */
1913 latch_set(&dp->exit_latch);
1914 dp_netdev_reload_pmd_threads(dp);
1915 for (i = 0; i < dp->n_pmd_threads; i++) {
1916 struct pmd_thread *f = &dp->pmd_threads[i];
1918 xpthread_join(f->thread, NULL);
1920 latch_poll(&dp->exit_latch);
1921 free(dp->pmd_threads);
1923 /* Start new threads. */
1924 dp->pmd_threads = xmalloc(n * sizeof *dp->pmd_threads);
1925 dp->n_pmd_threads = n;
1927 for (i = 0; i < n; i++) {
1928 struct pmd_thread *f = &dp->pmd_threads[i];
1932 atomic_store(&f->change_seq, 1);
1934 /* Each thread will distribute all devices rx-queues among
1936 f->thread = ovs_thread_create("pmd", pmd_thread_main, f);
1942 dp_netdev_flow_stats_new_cb(void)
1944 struct dp_netdev_flow_stats *bucket = xzalloc_cacheline(sizeof *bucket);
1945 ovs_mutex_init(&bucket->mutex);
1950 dp_netdev_flow_used(struct dp_netdev_flow *netdev_flow,
1951 const struct ofpbuf *packet,
1952 const struct miniflow *key)
1954 uint16_t tcp_flags = miniflow_get_tcp_flags(key);
1955 long long int now = time_msec();
1956 struct dp_netdev_flow_stats *bucket;
1958 bucket = ovsthread_stats_bucket_get(&netdev_flow->stats,
1959 dp_netdev_flow_stats_new_cb);
1961 ovs_mutex_lock(&bucket->mutex);
1962 bucket->used = MAX(now, bucket->used);
1963 bucket->packet_count++;
1964 bucket->byte_count += ofpbuf_size(packet);
1965 bucket->tcp_flags |= tcp_flags;
1966 ovs_mutex_unlock(&bucket->mutex);
1970 dp_netdev_stats_new_cb(void)
1972 struct dp_netdev_stats *bucket = xzalloc_cacheline(sizeof *bucket);
1973 ovs_mutex_init(&bucket->mutex);
1978 dp_netdev_count_packet(struct dp_netdev *dp, enum dp_stat_type type)
1980 struct dp_netdev_stats *bucket;
1982 bucket = ovsthread_stats_bucket_get(&dp->stats, dp_netdev_stats_new_cb);
1983 ovs_mutex_lock(&bucket->mutex);
1985 ovs_mutex_unlock(&bucket->mutex);
1989 dp_netdev_input(struct dp_netdev *dp, struct ofpbuf *packet,
1990 struct pkt_metadata *md)
1992 struct dp_netdev_flow *netdev_flow;
1994 struct miniflow flow;
1995 uint32_t buf[FLOW_U32S];
1998 if (ofpbuf_size(packet) < ETH_HEADER_LEN) {
1999 ofpbuf_delete(packet);
2002 miniflow_initialize(&key.flow, key.buf);
2003 miniflow_extract(packet, md, &key.flow);
2005 netdev_flow = dp_netdev_lookup_flow(dp, &key.flow);
2007 struct dp_netdev_actions *actions;
2009 dp_netdev_flow_used(netdev_flow, packet, &key.flow);
2011 actions = dp_netdev_flow_get_actions(netdev_flow);
2012 dp_netdev_execute_actions(dp, &key.flow, packet, true, md,
2013 actions->actions, actions->size);
2014 dp_netdev_count_packet(dp, DP_STAT_HIT);
2015 } else if (dp->handler_queues) {
2016 dp_netdev_count_packet(dp, DP_STAT_MISS);
2017 dp_netdev_output_userspace(dp, packet,
2018 miniflow_hash_5tuple(&key.flow, 0)
2020 DPIF_UC_MISS, &key.flow, NULL);
2025 dp_netdev_port_input(struct dp_netdev *dp, struct ofpbuf *packet,
2026 struct pkt_metadata *md)
2028 uint32_t *recirc_depth = recirc_depth_get();
2031 dp_netdev_input(dp, packet, md);
2035 dp_netdev_output_userspace(struct dp_netdev *dp, struct ofpbuf *packet,
2036 int queue_no, int type, const struct miniflow *key,
2037 const struct nlattr *userdata)
2039 struct dp_netdev_queue *q;
2042 fat_rwlock_rdlock(&dp->queue_rwlock);
2043 q = &dp->handler_queues[queue_no];
2044 ovs_mutex_lock(&q->mutex);
2045 if (q->head - q->tail < MAX_QUEUE_LEN) {
2046 struct dp_netdev_upcall *u = &q->upcalls[q->head++ & QUEUE_MASK];
2047 struct dpif_upcall *upcall = &u->upcall;
2048 struct ofpbuf *buf = &u->buf;
2052 upcall->type = type;
2054 /* Allocate buffer big enough for everything. */
2055 buf_size = ODPUTIL_FLOW_KEY_BYTES;
2057 buf_size += NLA_ALIGN(userdata->nla_len);
2059 ofpbuf_init(buf, buf_size);
2062 miniflow_expand(key, &flow);
2063 odp_flow_key_from_flow(buf, &flow, NULL, flow.in_port.odp_port, true);
2064 upcall->key = ofpbuf_data(buf);
2065 upcall->key_len = ofpbuf_size(buf);
2069 upcall->userdata = ofpbuf_put(buf, userdata,
2070 NLA_ALIGN(userdata->nla_len));
2073 upcall->packet = *packet;
2079 dp_netdev_count_packet(dp, DP_STAT_LOST);
2080 ofpbuf_delete(packet);
2083 ovs_mutex_unlock(&q->mutex);
2084 fat_rwlock_unlock(&dp->queue_rwlock);
2089 struct dp_netdev_execute_aux {
2090 struct dp_netdev *dp;
2091 const struct miniflow *key;
2095 dp_execute_cb(void *aux_, struct ofpbuf *packet,
2096 struct pkt_metadata *md,
2097 const struct nlattr *a, bool may_steal)
2098 OVS_NO_THREAD_SAFETY_ANALYSIS
2100 struct dp_netdev_execute_aux *aux = aux_;
2101 int type = nl_attr_type(a);
2102 struct dp_netdev_port *p;
2103 uint32_t *depth = recirc_depth_get();
2105 switch ((enum ovs_action_attr)type) {
2106 case OVS_ACTION_ATTR_OUTPUT:
2107 p = dp_netdev_lookup_port(aux->dp, u32_to_odp(nl_attr_get_u32(a)));
2109 netdev_send(p->netdev, packet, may_steal);
2113 case OVS_ACTION_ATTR_USERSPACE: {
2114 struct ofpbuf *userspace_packet;
2115 const struct nlattr *userdata;
2117 userdata = nl_attr_find_nested(a, OVS_USERSPACE_ATTR_USERDATA);
2118 userspace_packet = may_steal ? packet : ofpbuf_clone(packet);
2120 dp_netdev_output_userspace(aux->dp, userspace_packet,
2121 miniflow_hash_5tuple(aux->key, 0)
2122 % aux->dp->n_handlers,
2123 DPIF_UC_ACTION, aux->key,
2128 case OVS_ACTION_ATTR_HASH: {
2129 const struct ovs_action_hash *hash_act;
2132 hash_act = nl_attr_get(a);
2133 if (hash_act->hash_alg == OVS_HASH_ALG_L4) {
2134 /* Hash need not be symmetric, nor does it need to include
2136 hash = miniflow_hash_5tuple(aux->key, hash_act->hash_basis);
2138 hash = 1; /* 0 is not valid */
2142 VLOG_WARN("Unknown hash algorithm specified for the hash action.");
2150 case OVS_ACTION_ATTR_RECIRC:
2151 if (*depth < MAX_RECIRC_DEPTH) {
2152 struct pkt_metadata recirc_md = *md;
2153 struct ofpbuf *recirc_packet;
2155 recirc_packet = may_steal ? packet : ofpbuf_clone(packet);
2156 recirc_md.recirc_id = nl_attr_get_u32(a);
2159 dp_netdev_input(aux->dp, recirc_packet, &recirc_md);
2164 VLOG_WARN("Packet dropped. Max recirculation depth exceeded.");
2168 case OVS_ACTION_ATTR_PUSH_VLAN:
2169 case OVS_ACTION_ATTR_POP_VLAN:
2170 case OVS_ACTION_ATTR_PUSH_MPLS:
2171 case OVS_ACTION_ATTR_POP_MPLS:
2172 case OVS_ACTION_ATTR_SET:
2173 case OVS_ACTION_ATTR_SAMPLE:
2174 case OVS_ACTION_ATTR_UNSPEC:
2175 case __OVS_ACTION_ATTR_MAX:
2181 dp_netdev_execute_actions(struct dp_netdev *dp, const struct miniflow *key,
2182 struct ofpbuf *packet, bool may_steal,
2183 struct pkt_metadata *md,
2184 const struct nlattr *actions, size_t actions_len)
2186 struct dp_netdev_execute_aux aux = {dp, key};
2188 odp_execute_actions(&aux, packet, may_steal, md,
2189 actions, actions_len, dp_execute_cb);
2192 const struct dpif_class dpif_netdev_class = {
2194 dpif_netdev_enumerate,
2195 dpif_netdev_port_open_type,
2198 dpif_netdev_destroy,
2201 dpif_netdev_get_stats,
2202 dpif_netdev_port_add,
2203 dpif_netdev_port_del,
2204 dpif_netdev_port_query_by_number,
2205 dpif_netdev_port_query_by_name,
2206 NULL, /* port_get_pid */
2207 dpif_netdev_port_dump_start,
2208 dpif_netdev_port_dump_next,
2209 dpif_netdev_port_dump_done,
2210 dpif_netdev_port_poll,
2211 dpif_netdev_port_poll_wait,
2212 dpif_netdev_flow_get,
2213 dpif_netdev_flow_put,
2214 dpif_netdev_flow_del,
2215 dpif_netdev_flow_flush,
2216 dpif_netdev_flow_dump_create,
2217 dpif_netdev_flow_dump_destroy,
2218 dpif_netdev_flow_dump_thread_create,
2219 dpif_netdev_flow_dump_thread_destroy,
2220 dpif_netdev_flow_dump_next,
2221 dpif_netdev_execute,
2223 dpif_netdev_recv_set,
2224 dpif_netdev_handlers_set,
2225 dpif_netdev_queue_to_priority,
2227 dpif_netdev_recv_wait,
2228 dpif_netdev_recv_purge,
2232 dpif_dummy_change_port_number(struct unixctl_conn *conn, int argc OVS_UNUSED,
2233 const char *argv[], void *aux OVS_UNUSED)
2235 struct dp_netdev_port *old_port;
2236 struct dp_netdev_port *new_port;
2237 struct dp_netdev *dp;
2240 ovs_mutex_lock(&dp_netdev_mutex);
2241 dp = shash_find_data(&dp_netdevs, argv[1]);
2242 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
2243 ovs_mutex_unlock(&dp_netdev_mutex);
2244 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
2247 ovs_refcount_ref(&dp->ref_cnt);
2248 ovs_mutex_unlock(&dp_netdev_mutex);
2250 ovs_mutex_lock(&dp->port_mutex);
2251 if (get_port_by_name(dp, argv[2], &old_port)) {
2252 unixctl_command_reply_error(conn, "unknown port");
2256 port_no = u32_to_odp(atoi(argv[3]));
2257 if (!port_no || port_no == ODPP_NONE) {
2258 unixctl_command_reply_error(conn, "bad port number");
2261 if (dp_netdev_lookup_port(dp, port_no)) {
2262 unixctl_command_reply_error(conn, "port number already in use");
2266 /* Remove old port. */
2267 cmap_remove(&dp->ports, &old_port->node, hash_port_no(old_port->port_no));
2268 ovsrcu_postpone(free, old_port);
2270 /* Insert new port (cmap semantics mean we cannot re-insert 'old_port'). */
2271 new_port = xmemdup(old_port, sizeof *old_port);
2272 new_port->port_no = port_no;
2273 cmap_insert(&dp->ports, &new_port->node, hash_port_no(port_no));
2275 seq_change(dp->port_seq);
2276 unixctl_command_reply(conn, NULL);
2279 ovs_mutex_unlock(&dp->port_mutex);
2280 dp_netdev_unref(dp);
2284 dpif_dummy_delete_port(struct unixctl_conn *conn, int argc OVS_UNUSED,
2285 const char *argv[], void *aux OVS_UNUSED)
2287 struct dp_netdev_port *port;
2288 struct dp_netdev *dp;
2290 ovs_mutex_lock(&dp_netdev_mutex);
2291 dp = shash_find_data(&dp_netdevs, argv[1]);
2292 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
2293 ovs_mutex_unlock(&dp_netdev_mutex);
2294 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
2297 ovs_refcount_ref(&dp->ref_cnt);
2298 ovs_mutex_unlock(&dp_netdev_mutex);
2300 ovs_mutex_lock(&dp->port_mutex);
2301 if (get_port_by_name(dp, argv[2], &port)) {
2302 unixctl_command_reply_error(conn, "unknown port");
2303 } else if (port->port_no == ODPP_LOCAL) {
2304 unixctl_command_reply_error(conn, "can't delete local port");
2306 do_del_port(dp, port);
2307 unixctl_command_reply(conn, NULL);
2309 ovs_mutex_unlock(&dp->port_mutex);
2311 dp_netdev_unref(dp);
2315 dpif_dummy_register__(const char *type)
2317 struct dpif_class *class;
2319 class = xmalloc(sizeof *class);
2320 *class = dpif_netdev_class;
2321 class->type = xstrdup(type);
2322 dp_register_provider(class);
2326 dpif_dummy_register(bool override)
2333 dp_enumerate_types(&types);
2334 SSET_FOR_EACH (type, &types) {
2335 if (!dp_unregister_provider(type)) {
2336 dpif_dummy_register__(type);
2339 sset_destroy(&types);
2342 dpif_dummy_register__("dummy");
2344 unixctl_command_register("dpif-dummy/change-port-number",
2345 "DP PORT NEW-NUMBER",
2346 3, 3, dpif_dummy_change_port_number, NULL);
2347 unixctl_command_register("dpif-dummy/delete-port", "DP PORT",
2348 2, 2, dpif_dummy_delete_port, NULL);