2 * Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
24 #include <netinet/in.h>
25 #include <sys/socket.h>
30 #include <sys/ioctl.h>
34 #include "classifier.h"
37 #include "dpif-provider.h"
39 #include "dynamic-string.h"
44 #include "meta-flow.h"
46 #include "netdev-dpdk.h"
47 #include "netdev-vport.h"
49 #include "odp-execute.h"
51 #include "ofp-print.h"
55 #include "poll-loop.h"
65 VLOG_DEFINE_THIS_MODULE(dpif_netdev);
67 /* By default, choose a priority in the middle. */
68 #define NETDEV_RULE_PRIORITY 0x8000
72 /* Configuration parameters. */
73 enum { MAX_FLOWS = 65536 }; /* Maximum number of flows in flow table. */
76 enum { MAX_QUEUE_LEN = 128 }; /* Maximum number of packets per queue. */
77 enum { QUEUE_MASK = MAX_QUEUE_LEN - 1 };
78 BUILD_ASSERT_DECL(IS_POW2(MAX_QUEUE_LEN));
80 /* Protects against changes to 'dp_netdevs'. */
81 static struct ovs_mutex dp_netdev_mutex = OVS_MUTEX_INITIALIZER;
83 /* Contains all 'struct dp_netdev's. */
84 static struct shash dp_netdevs OVS_GUARDED_BY(dp_netdev_mutex)
85 = SHASH_INITIALIZER(&dp_netdevs);
87 struct dp_netdev_upcall {
88 struct dpif_upcall upcall; /* Queued upcall information. */
89 struct ofpbuf buf; /* ofpbuf instance for upcall.packet. */
92 /* A queue passing packets from a struct dp_netdev to its clients (handlers).
98 * Any access at all requires the owning 'dp_netdev''s queue_rwlock and
100 struct dp_netdev_queue {
101 struct ovs_mutex mutex;
102 struct seq *seq; /* Incremented whenever a packet is queued. */
103 struct dp_netdev_upcall upcalls[MAX_QUEUE_LEN] OVS_GUARDED;
104 unsigned int head OVS_GUARDED;
105 unsigned int tail OVS_GUARDED;
108 /* Datapath based on the network device interface from netdev.h.
114 * Some members, marked 'const', are immutable. Accessing other members
115 * requires synchronization, as noted in more detail below.
117 * Acquisition order is, from outermost to innermost:
119 * dp_netdev_mutex (global)
126 const struct dpif_class *const class;
127 const char *const name;
128 struct ovs_refcount ref_cnt;
129 atomic_flag destroyed;
133 * Readers of 'cls' and 'flow_table' must take a 'cls->rwlock' read lock.
135 * Writers of 'cls' and 'flow_table' must take the 'flow_mutex' and then
136 * the 'cls->rwlock' write lock. (The outer 'flow_mutex' allows writers to
137 * atomically perform multiple operations on 'cls' and 'flow_table'.)
139 struct ovs_mutex flow_mutex;
140 struct classifier cls; /* Classifier. Protected by cls.rwlock. */
141 struct hmap flow_table OVS_GUARDED; /* Flow table. */
145 * 'queue_rwlock' protects the modification of 'handler_queues' and
146 * 'n_handlers'. The queue elements are protected by its
147 * 'handler_queues''s mutex. */
148 struct fat_rwlock queue_rwlock;
149 struct dp_netdev_queue *handler_queues;
154 * ovsthread_stats is internally synchronized. */
155 struct ovsthread_stats stats; /* Contains 'struct dp_netdev_stats *'. */
159 * Any lookup into 'ports' or any access to the dp_netdev_ports found
160 * through 'ports' requires taking 'port_rwlock'. */
161 struct ovs_rwlock port_rwlock;
162 struct hmap ports OVS_GUARDED;
163 struct seq *port_seq; /* Incremented whenever a port changes. */
165 /* Forwarding threads. */
166 struct latch exit_latch;
167 struct pmd_thread *pmd_threads;
168 size_t n_pmd_threads;
172 static struct dp_netdev_port *dp_netdev_lookup_port(const struct dp_netdev *dp,
174 OVS_REQ_RDLOCK(dp->port_rwlock);
177 DP_STAT_HIT, /* Packets that matched in the flow table. */
178 DP_STAT_MISS, /* Packets that did not match. */
179 DP_STAT_LOST, /* Packets not passed up to the client. */
183 /* Contained by struct dp_netdev's 'stats' member. */
184 struct dp_netdev_stats {
185 struct ovs_mutex mutex; /* Protects 'n'. */
187 /* Indexed by DP_STAT_*, protected by 'mutex'. */
188 unsigned long long int n[DP_N_STATS] OVS_GUARDED;
192 /* A port in a netdev-based datapath. */
193 struct dp_netdev_port {
194 struct hmap_node node; /* Node in dp_netdev's 'ports'. */
196 struct netdev *netdev;
197 struct netdev_saved_flags *sf;
198 struct netdev_rxq **rxq;
199 struct ovs_refcount ref_cnt;
200 char *type; /* Port type as requested by user. */
203 /* A flow in dp_netdev's 'flow_table'.
209 * Except near the beginning or ending of its lifespan, rule 'rule' belongs to
210 * its dp_netdev's classifier. The text below calls this classifier 'cls'.
215 * The thread safety rules described here for "struct dp_netdev_flow" are
216 * motivated by two goals:
218 * - Prevent threads that read members of "struct dp_netdev_flow" from
219 * reading bad data due to changes by some thread concurrently modifying
222 * - Prevent two threads making changes to members of a given "struct
223 * dp_netdev_flow" from interfering with each other.
229 * A flow 'flow' may be accessed without a risk of being freed by code that
230 * holds a read-lock or write-lock on 'cls->rwlock' or that owns a reference to
231 * 'flow->ref_cnt' (or both). Code that needs to hold onto a flow for a while
232 * should take 'cls->rwlock', find the flow it needs, increment 'flow->ref_cnt'
233 * with dpif_netdev_flow_ref(), and drop 'cls->rwlock'.
235 * 'flow->ref_cnt' protects 'flow' from being freed. It doesn't protect the
236 * flow from being deleted from 'cls' (that's 'cls->rwlock') and it doesn't
237 * protect members of 'flow' from modification (that's 'flow->mutex').
239 * 'flow->mutex' protects the members of 'flow' from modification. It doesn't
240 * protect the flow from being deleted from 'cls' (that's 'cls->rwlock') and it
241 * doesn't prevent the flow from being freed (that's 'flow->ref_cnt').
243 * Some members, marked 'const', are immutable. Accessing other members
244 * requires synchronization, as noted in more detail below.
246 struct dp_netdev_flow {
247 /* Packet classification. */
248 const struct cls_rule cr; /* In owning dp_netdev's 'cls'. */
250 /* Hash table index by unmasked flow. */
251 const struct hmap_node node; /* In owning dp_netdev's 'flow_table'. */
252 const struct flow flow; /* The flow that created this entry. */
254 /* Protects members marked OVS_GUARDED.
256 * Acquire after datapath's flow_mutex. */
257 struct ovs_mutex mutex OVS_ACQ_AFTER(dp_netdev_mutex);
261 * Reading or writing these members requires 'mutex'. */
262 struct ovsthread_stats stats; /* Contains "struct dp_netdev_flow_stats". */
266 * Reading 'actions' requires 'mutex'.
267 * Writing 'actions' requires 'mutex' and (to allow for transactions) the
268 * datapath's flow_mutex. */
269 OVSRCU_TYPE(struct dp_netdev_actions *) actions;
272 static void dp_netdev_flow_free(struct dp_netdev_flow *);
274 /* Contained by struct dp_netdev_flow's 'stats' member. */
275 struct dp_netdev_flow_stats {
276 struct ovs_mutex mutex; /* Guards all the other members. */
278 long long int used OVS_GUARDED; /* Last used time, in monotonic msecs. */
279 long long int packet_count OVS_GUARDED; /* Number of packets matched. */
280 long long int byte_count OVS_GUARDED; /* Number of bytes matched. */
281 uint16_t tcp_flags OVS_GUARDED; /* Bitwise-OR of seen tcp_flags values. */
284 /* A set of datapath actions within a "struct dp_netdev_flow".
290 * A struct dp_netdev_actions 'actions' may be accessed without a risk of being
291 * freed by code that holds a read-lock or write-lock on 'flow->mutex' (where
292 * 'flow' is the dp_netdev_flow for which 'flow->actions == actions') or that
293 * owns a reference to 'actions->ref_cnt' (or both). */
294 struct dp_netdev_actions {
295 /* These members are immutable: they do not change during the struct's
297 struct nlattr *actions; /* Sequence of OVS_ACTION_ATTR_* attributes. */
298 unsigned int size; /* Size of 'actions', in bytes. */
301 struct dp_netdev_actions *dp_netdev_actions_create(const struct nlattr *,
303 struct dp_netdev_actions *dp_netdev_flow_get_actions(
304 const struct dp_netdev_flow *);
305 static void dp_netdev_actions_free(struct dp_netdev_actions *);
307 /* PMD: Poll modes drivers. PMD accesses devices via polling to eliminate
308 * the performance overhead of interrupt processing. Therefore netdev can
309 * not implement rx-wait for these devices. dpif-netdev needs to poll
310 * these device to check for recv buffer. pmd-thread does polling for
311 * devices assigned to itself thread.
313 * DPDK used PMD for accessing NIC.
315 * A thread that receives packets from PMD ports, looks them up in the flow
316 * table, and executes the actions it finds.
319 struct dp_netdev *dp;
322 atomic_uint change_seq;
326 /* Interface to netdev-based datapath. */
329 struct dp_netdev *dp;
330 uint64_t last_port_seq;
333 static int get_port_by_number(struct dp_netdev *dp, odp_port_t port_no,
334 struct dp_netdev_port **portp)
335 OVS_REQ_RDLOCK(dp->port_rwlock);
336 static int get_port_by_name(struct dp_netdev *dp, const char *devname,
337 struct dp_netdev_port **portp)
338 OVS_REQ_RDLOCK(dp->port_rwlock);
339 static void dp_netdev_free(struct dp_netdev *)
340 OVS_REQUIRES(dp_netdev_mutex);
341 static void dp_netdev_flow_flush(struct dp_netdev *);
342 static int do_add_port(struct dp_netdev *dp, const char *devname,
343 const char *type, odp_port_t port_no)
344 OVS_REQ_WRLOCK(dp->port_rwlock);
345 static int do_del_port(struct dp_netdev *dp, odp_port_t port_no)
346 OVS_REQ_WRLOCK(dp->port_rwlock);
347 static void dp_netdev_destroy_all_queues(struct dp_netdev *dp)
348 OVS_REQ_WRLOCK(dp->queue_rwlock);
349 static int dpif_netdev_open(const struct dpif_class *, const char *name,
350 bool create, struct dpif **);
351 static int dp_netdev_output_userspace(struct dp_netdev *dp, struct ofpbuf *,
352 int queue_no, int type,
354 const struct nlattr *userdata);
355 static void dp_netdev_execute_actions(struct dp_netdev *dp,
356 const struct flow *, struct ofpbuf *, bool may_steal,
357 struct pkt_metadata *,
358 const struct nlattr *actions,
360 static void dp_netdev_port_input(struct dp_netdev *dp, struct ofpbuf *packet,
361 struct pkt_metadata *);
363 static void dp_netdev_set_pmd_threads(struct dp_netdev *, int n);
365 static struct dpif_netdev *
366 dpif_netdev_cast(const struct dpif *dpif)
368 ovs_assert(dpif->dpif_class->open == dpif_netdev_open);
369 return CONTAINER_OF(dpif, struct dpif_netdev, dpif);
372 static struct dp_netdev *
373 get_dp_netdev(const struct dpif *dpif)
375 return dpif_netdev_cast(dpif)->dp;
379 dpif_netdev_enumerate(struct sset *all_dps)
381 struct shash_node *node;
383 ovs_mutex_lock(&dp_netdev_mutex);
384 SHASH_FOR_EACH(node, &dp_netdevs) {
385 sset_add(all_dps, node->name);
387 ovs_mutex_unlock(&dp_netdev_mutex);
393 dpif_netdev_class_is_dummy(const struct dpif_class *class)
395 return class != &dpif_netdev_class;
399 dpif_netdev_class_is_planetlab(const struct dpif_class *class)
401 return class == &dpif_planetlab_class;
405 dpif_netdev_port_open_type(const struct dpif_class *class, const char *type)
407 return strcmp(type, "internal") ? type
408 : dpif_netdev_class_is_planetlab(class) ? "pltap"
409 : dpif_netdev_class_is_dummy(class) ? "dummy"
414 create_dpif_netdev(struct dp_netdev *dp)
416 uint16_t netflow_id = hash_string(dp->name, 0);
417 struct dpif_netdev *dpif;
419 ovs_refcount_ref(&dp->ref_cnt);
421 dpif = xmalloc(sizeof *dpif);
422 dpif_init(&dpif->dpif, dp->class, dp->name, netflow_id >> 8, netflow_id);
424 dpif->last_port_seq = seq_read(dp->port_seq);
429 /* Choose an unused, non-zero port number and return it on success.
430 * Return ODPP_NONE on failure. */
432 choose_port(struct dp_netdev *dp, const char *name)
433 OVS_REQ_RDLOCK(dp->port_rwlock)
437 if (dp->class != &dpif_netdev_class &&
438 dp->class != &dpif_planetlab_class) {
442 /* If the port name begins with "br", start the number search at
443 * 100 to make writing tests easier. */
444 if (!strncmp(name, "br", 2)) {
448 /* If the port name contains a number, try to assign that port number.
449 * This can make writing unit tests easier because port numbers are
451 for (p = name; *p != '\0'; p++) {
452 if (isdigit((unsigned char) *p)) {
453 port_no = start_no + strtol(p, NULL, 10);
454 if (port_no > 0 && port_no != odp_to_u32(ODPP_NONE)
455 && !dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
456 return u32_to_odp(port_no);
463 for (port_no = 1; port_no <= UINT16_MAX; port_no++) {
464 if (!dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
465 return u32_to_odp(port_no);
473 create_dp_netdev(const char *name, const struct dpif_class *class,
474 struct dp_netdev **dpp)
475 OVS_REQUIRES(dp_netdev_mutex)
477 struct dp_netdev *dp;
480 dp = xzalloc(sizeof *dp);
481 shash_add(&dp_netdevs, name, dp);
483 *CONST_CAST(const struct dpif_class **, &dp->class) = class;
484 *CONST_CAST(const char **, &dp->name) = xstrdup(name);
485 ovs_refcount_init(&dp->ref_cnt);
486 atomic_flag_clear(&dp->destroyed);
488 ovs_mutex_init(&dp->flow_mutex);
489 classifier_init(&dp->cls, NULL);
490 hmap_init(&dp->flow_table);
492 fat_rwlock_init(&dp->queue_rwlock);
494 ovsthread_stats_init(&dp->stats);
496 ovs_rwlock_init(&dp->port_rwlock);
497 hmap_init(&dp->ports);
498 dp->port_seq = seq_create();
499 latch_init(&dp->exit_latch);
501 ovs_rwlock_wrlock(&dp->port_rwlock);
502 error = do_add_port(dp, name, "internal", ODPP_LOCAL);
503 ovs_rwlock_unlock(&dp->port_rwlock);
514 dpif_netdev_open(const struct dpif_class *class, const char *name,
515 bool create, struct dpif **dpifp)
517 struct dp_netdev *dp;
520 ovs_mutex_lock(&dp_netdev_mutex);
521 dp = shash_find_data(&dp_netdevs, name);
523 error = create ? create_dp_netdev(name, class, &dp) : ENODEV;
525 error = (dp->class != class ? EINVAL
530 *dpifp = create_dpif_netdev(dp);
532 ovs_mutex_unlock(&dp_netdev_mutex);
538 dp_netdev_purge_queues(struct dp_netdev *dp)
539 OVS_REQ_WRLOCK(dp->queue_rwlock)
543 for (i = 0; i < dp->n_handlers; i++) {
544 struct dp_netdev_queue *q = &dp->handler_queues[i];
546 ovs_mutex_lock(&q->mutex);
547 while (q->tail != q->head) {
548 struct dp_netdev_upcall *u = &q->upcalls[q->tail++ & QUEUE_MASK];
549 ofpbuf_uninit(&u->upcall.packet);
550 ofpbuf_uninit(&u->buf);
552 ovs_mutex_unlock(&q->mutex);
556 /* Requires dp_netdev_mutex so that we can't get a new reference to 'dp'
557 * through the 'dp_netdevs' shash while freeing 'dp'. */
559 dp_netdev_free(struct dp_netdev *dp)
560 OVS_REQUIRES(dp_netdev_mutex)
562 struct dp_netdev_port *port, *next;
563 struct dp_netdev_stats *bucket;
566 shash_find_and_delete(&dp_netdevs, dp->name);
568 dp_netdev_set_pmd_threads(dp, 0);
569 free(dp->pmd_threads);
571 dp_netdev_flow_flush(dp);
572 ovs_rwlock_wrlock(&dp->port_rwlock);
573 HMAP_FOR_EACH_SAFE (port, next, node, &dp->ports) {
574 do_del_port(dp, port->port_no);
576 ovs_rwlock_unlock(&dp->port_rwlock);
578 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
579 ovs_mutex_destroy(&bucket->mutex);
580 free_cacheline(bucket);
582 ovsthread_stats_destroy(&dp->stats);
584 fat_rwlock_wrlock(&dp->queue_rwlock);
585 dp_netdev_destroy_all_queues(dp);
586 fat_rwlock_unlock(&dp->queue_rwlock);
588 fat_rwlock_destroy(&dp->queue_rwlock);
590 classifier_destroy(&dp->cls);
591 hmap_destroy(&dp->flow_table);
592 ovs_mutex_destroy(&dp->flow_mutex);
593 seq_destroy(dp->port_seq);
594 hmap_destroy(&dp->ports);
595 latch_destroy(&dp->exit_latch);
596 free(CONST_CAST(char *, dp->name));
601 dp_netdev_unref(struct dp_netdev *dp)
604 /* Take dp_netdev_mutex so that, if dp->ref_cnt falls to zero, we can't
605 * get a new reference to 'dp' through the 'dp_netdevs' shash. */
606 ovs_mutex_lock(&dp_netdev_mutex);
607 if (ovs_refcount_unref(&dp->ref_cnt) == 1) {
610 ovs_mutex_unlock(&dp_netdev_mutex);
615 dpif_netdev_close(struct dpif *dpif)
617 struct dp_netdev *dp = get_dp_netdev(dpif);
624 dpif_netdev_destroy(struct dpif *dpif)
626 struct dp_netdev *dp = get_dp_netdev(dpif);
628 if (!atomic_flag_test_and_set(&dp->destroyed)) {
629 if (ovs_refcount_unref(&dp->ref_cnt) == 1) {
630 /* Can't happen: 'dpif' still owns a reference to 'dp'. */
639 dpif_netdev_get_stats(const struct dpif *dpif, struct dpif_dp_stats *stats)
641 struct dp_netdev *dp = get_dp_netdev(dpif);
642 struct dp_netdev_stats *bucket;
645 fat_rwlock_rdlock(&dp->cls.rwlock);
646 stats->n_flows = hmap_count(&dp->flow_table);
647 fat_rwlock_unlock(&dp->cls.rwlock);
649 stats->n_hit = stats->n_missed = stats->n_lost = 0;
650 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
651 ovs_mutex_lock(&bucket->mutex);
652 stats->n_hit += bucket->n[DP_STAT_HIT];
653 stats->n_missed += bucket->n[DP_STAT_MISS];
654 stats->n_lost += bucket->n[DP_STAT_LOST];
655 ovs_mutex_unlock(&bucket->mutex);
657 stats->n_masks = UINT32_MAX;
658 stats->n_mask_hit = UINT64_MAX;
664 dp_netdev_reload_pmd_threads(struct dp_netdev *dp)
668 for (i = 0; i < dp->n_pmd_threads; i++) {
669 struct pmd_thread *f = &dp->pmd_threads[i];
672 atomic_add(&f->change_seq, 1, &id);
677 do_add_port(struct dp_netdev *dp, const char *devname, const char *type,
679 OVS_REQ_WRLOCK(dp->port_rwlock)
681 struct netdev_saved_flags *sf;
682 struct dp_netdev_port *port;
683 struct netdev *netdev;
684 enum netdev_flags flags;
685 const char *open_type;
689 /* XXX reject devices already in some dp_netdev. */
691 /* Open and validate network device. */
692 open_type = dpif_netdev_port_open_type(dp->class, type);
693 error = netdev_open(devname, open_type, &netdev);
697 /* XXX reject non-Ethernet devices */
699 netdev_get_flags(netdev, &flags);
700 if (flags & NETDEV_LOOPBACK) {
701 VLOG_ERR("%s: cannot add a loopback device", devname);
702 netdev_close(netdev);
706 port = xzalloc(sizeof *port);
707 port->port_no = port_no;
708 port->netdev = netdev;
709 port->rxq = xmalloc(sizeof *port->rxq * netdev_n_rxq(netdev));
710 port->type = xstrdup(type);
711 for (i = 0; i < netdev_n_rxq(netdev); i++) {
712 error = netdev_rxq_open(netdev, &port->rxq[i], i);
714 && !(error == EOPNOTSUPP && dpif_netdev_class_is_dummy(dp->class))) {
715 VLOG_ERR("%s: cannot receive packets on this network device (%s)",
716 devname, ovs_strerror(errno));
717 netdev_close(netdev);
722 error = netdev_turn_flags_on(netdev, NETDEV_PROMISC, &sf);
724 for (i = 0; i < netdev_n_rxq(netdev); i++) {
725 netdev_rxq_close(port->rxq[i]);
727 netdev_close(netdev);
734 if (netdev_is_pmd(netdev)) {
736 dp_netdev_set_pmd_threads(dp, NR_THREADS);
737 dp_netdev_reload_pmd_threads(dp);
739 ovs_refcount_init(&port->ref_cnt);
741 hmap_insert(&dp->ports, &port->node, hash_int(odp_to_u32(port_no), 0));
742 seq_change(dp->port_seq);
748 dpif_netdev_port_add(struct dpif *dpif, struct netdev *netdev,
749 odp_port_t *port_nop)
751 struct dp_netdev *dp = get_dp_netdev(dpif);
752 char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
753 const char *dpif_port;
757 ovs_rwlock_wrlock(&dp->port_rwlock);
758 dpif_port = netdev_vport_get_dpif_port(netdev, namebuf, sizeof namebuf);
759 if (*port_nop != ODPP_NONE) {
761 error = dp_netdev_lookup_port(dp, *port_nop) ? EBUSY : 0;
763 port_no = choose_port(dp, dpif_port);
764 error = port_no == ODPP_NONE ? EFBIG : 0;
768 error = do_add_port(dp, dpif_port, netdev_get_type(netdev), port_no);
770 ovs_rwlock_unlock(&dp->port_rwlock);
776 dpif_netdev_port_del(struct dpif *dpif, odp_port_t port_no)
778 struct dp_netdev *dp = get_dp_netdev(dpif);
781 ovs_rwlock_wrlock(&dp->port_rwlock);
782 error = port_no == ODPP_LOCAL ? EINVAL : do_del_port(dp, port_no);
783 ovs_rwlock_unlock(&dp->port_rwlock);
789 is_valid_port_number(odp_port_t port_no)
791 return port_no != ODPP_NONE;
794 static struct dp_netdev_port *
795 dp_netdev_lookup_port(const struct dp_netdev *dp, odp_port_t port_no)
796 OVS_REQ_RDLOCK(dp->port_rwlock)
798 struct dp_netdev_port *port;
800 HMAP_FOR_EACH_IN_BUCKET (port, node, hash_int(odp_to_u32(port_no), 0),
802 if (port->port_no == port_no) {
810 get_port_by_number(struct dp_netdev *dp,
811 odp_port_t port_no, struct dp_netdev_port **portp)
812 OVS_REQ_RDLOCK(dp->port_rwlock)
814 if (!is_valid_port_number(port_no)) {
818 *portp = dp_netdev_lookup_port(dp, port_no);
819 return *portp ? 0 : ENOENT;
824 port_ref(struct dp_netdev_port *port)
827 ovs_refcount_ref(&port->ref_cnt);
832 port_unref(struct dp_netdev_port *port)
834 if (port && ovs_refcount_unref(&port->ref_cnt) == 1) {
837 netdev_close(port->netdev);
838 netdev_restore_flags(port->sf);
840 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
841 netdev_rxq_close(port->rxq[i]);
849 get_port_by_name(struct dp_netdev *dp,
850 const char *devname, struct dp_netdev_port **portp)
851 OVS_REQ_RDLOCK(dp->port_rwlock)
853 struct dp_netdev_port *port;
855 HMAP_FOR_EACH (port, node, &dp->ports) {
856 if (!strcmp(netdev_get_name(port->netdev), devname)) {
865 do_del_port(struct dp_netdev *dp, odp_port_t port_no)
866 OVS_REQ_WRLOCK(dp->port_rwlock)
868 struct dp_netdev_port *port;
871 error = get_port_by_number(dp, port_no, &port);
876 hmap_remove(&dp->ports, &port->node);
877 seq_change(dp->port_seq);
878 if (netdev_is_pmd(port->netdev)) {
879 dp_netdev_reload_pmd_threads(dp);
887 answer_port_query(const struct dp_netdev_port *port,
888 struct dpif_port *dpif_port)
890 dpif_port->name = xstrdup(netdev_get_name(port->netdev));
891 dpif_port->type = xstrdup(port->type);
892 dpif_port->port_no = port->port_no;
896 dpif_netdev_port_query_by_number(const struct dpif *dpif, odp_port_t port_no,
897 struct dpif_port *dpif_port)
899 struct dp_netdev *dp = get_dp_netdev(dpif);
900 struct dp_netdev_port *port;
903 ovs_rwlock_rdlock(&dp->port_rwlock);
904 error = get_port_by_number(dp, port_no, &port);
905 if (!error && dpif_port) {
906 answer_port_query(port, dpif_port);
908 ovs_rwlock_unlock(&dp->port_rwlock);
914 dpif_netdev_port_query_by_name(const struct dpif *dpif, const char *devname,
915 struct dpif_port *dpif_port)
917 struct dp_netdev *dp = get_dp_netdev(dpif);
918 struct dp_netdev_port *port;
921 ovs_rwlock_rdlock(&dp->port_rwlock);
922 error = get_port_by_name(dp, devname, &port);
923 if (!error && dpif_port) {
924 answer_port_query(port, dpif_port);
926 ovs_rwlock_unlock(&dp->port_rwlock);
932 dp_netdev_flow_free(struct dp_netdev_flow *flow)
934 struct dp_netdev_flow_stats *bucket;
937 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &flow->stats) {
938 ovs_mutex_destroy(&bucket->mutex);
939 free_cacheline(bucket);
941 ovsthread_stats_destroy(&flow->stats);
943 cls_rule_destroy(CONST_CAST(struct cls_rule *, &flow->cr));
944 dp_netdev_actions_free(dp_netdev_flow_get_actions(flow));
945 ovs_mutex_destroy(&flow->mutex);
950 dp_netdev_remove_flow(struct dp_netdev *dp, struct dp_netdev_flow *flow)
951 OVS_REQ_WRLOCK(dp->cls.rwlock)
952 OVS_REQUIRES(dp->flow_mutex)
954 struct cls_rule *cr = CONST_CAST(struct cls_rule *, &flow->cr);
955 struct hmap_node *node = CONST_CAST(struct hmap_node *, &flow->node);
957 classifier_remove(&dp->cls, cr);
958 hmap_remove(&dp->flow_table, node);
959 ovsrcu_postpone(dp_netdev_flow_free, flow);
963 dp_netdev_flow_flush(struct dp_netdev *dp)
965 struct dp_netdev_flow *netdev_flow, *next;
967 ovs_mutex_lock(&dp->flow_mutex);
968 fat_rwlock_wrlock(&dp->cls.rwlock);
969 HMAP_FOR_EACH_SAFE (netdev_flow, next, node, &dp->flow_table) {
970 dp_netdev_remove_flow(dp, netdev_flow);
972 fat_rwlock_unlock(&dp->cls.rwlock);
973 ovs_mutex_unlock(&dp->flow_mutex);
977 dpif_netdev_flow_flush(struct dpif *dpif)
979 struct dp_netdev *dp = get_dp_netdev(dpif);
981 dp_netdev_flow_flush(dp);
985 struct dp_netdev_port_state {
992 dpif_netdev_port_dump_start(const struct dpif *dpif OVS_UNUSED, void **statep)
994 *statep = xzalloc(sizeof(struct dp_netdev_port_state));
999 dpif_netdev_port_dump_next(const struct dpif *dpif, void *state_,
1000 struct dpif_port *dpif_port)
1002 struct dp_netdev_port_state *state = state_;
1003 struct dp_netdev *dp = get_dp_netdev(dpif);
1004 struct hmap_node *node;
1007 ovs_rwlock_rdlock(&dp->port_rwlock);
1008 node = hmap_at_position(&dp->ports, &state->bucket, &state->offset);
1010 struct dp_netdev_port *port;
1012 port = CONTAINER_OF(node, struct dp_netdev_port, node);
1015 state->name = xstrdup(netdev_get_name(port->netdev));
1016 dpif_port->name = state->name;
1017 dpif_port->type = port->type;
1018 dpif_port->port_no = port->port_no;
1024 ovs_rwlock_unlock(&dp->port_rwlock);
1030 dpif_netdev_port_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
1032 struct dp_netdev_port_state *state = state_;
1039 dpif_netdev_port_poll(const struct dpif *dpif_, char **devnamep OVS_UNUSED)
1041 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
1042 uint64_t new_port_seq;
1045 new_port_seq = seq_read(dpif->dp->port_seq);
1046 if (dpif->last_port_seq != new_port_seq) {
1047 dpif->last_port_seq = new_port_seq;
1057 dpif_netdev_port_poll_wait(const struct dpif *dpif_)
1059 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
1061 seq_wait(dpif->dp->port_seq, dpif->last_port_seq);
1064 static struct dp_netdev_flow *
1065 dp_netdev_flow_cast(const struct cls_rule *cr)
1067 return cr ? CONTAINER_OF(cr, struct dp_netdev_flow, cr) : NULL;
1070 static struct dp_netdev_flow *
1071 dp_netdev_lookup_flow(const struct dp_netdev *dp, const struct flow *flow)
1072 OVS_EXCLUDED(dp->cls.rwlock)
1074 struct dp_netdev_flow *netdev_flow;
1076 fat_rwlock_rdlock(&dp->cls.rwlock);
1077 netdev_flow = dp_netdev_flow_cast(classifier_lookup(&dp->cls, flow, NULL));
1078 fat_rwlock_unlock(&dp->cls.rwlock);
1083 static struct dp_netdev_flow *
1084 dp_netdev_find_flow(const struct dp_netdev *dp, const struct flow *flow)
1085 OVS_REQ_RDLOCK(dp->cls.rwlock)
1087 struct dp_netdev_flow *netdev_flow;
1089 HMAP_FOR_EACH_WITH_HASH (netdev_flow, node, flow_hash(flow, 0),
1091 if (flow_equal(&netdev_flow->flow, flow)) {
1100 get_dpif_flow_stats(struct dp_netdev_flow *netdev_flow,
1101 struct dpif_flow_stats *stats)
1103 struct dp_netdev_flow_stats *bucket;
1106 memset(stats, 0, sizeof *stats);
1107 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
1108 ovs_mutex_lock(&bucket->mutex);
1109 stats->n_packets += bucket->packet_count;
1110 stats->n_bytes += bucket->byte_count;
1111 stats->used = MAX(stats->used, bucket->used);
1112 stats->tcp_flags |= bucket->tcp_flags;
1113 ovs_mutex_unlock(&bucket->mutex);
1118 dpif_netdev_mask_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1119 const struct nlattr *mask_key,
1120 uint32_t mask_key_len, const struct flow *flow,
1124 enum odp_key_fitness fitness;
1126 fitness = odp_flow_key_to_mask(mask_key, mask_key_len, mask, flow);
1128 /* This should not happen: it indicates that
1129 * odp_flow_key_from_mask() and odp_flow_key_to_mask()
1130 * disagree on the acceptable form of a mask. Log the problem
1131 * as an error, with enough details to enable debugging. */
1132 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1134 if (!VLOG_DROP_ERR(&rl)) {
1138 odp_flow_format(key, key_len, mask_key, mask_key_len, NULL, &s,
1140 VLOG_ERR("internal error parsing flow mask %s (%s)",
1141 ds_cstr(&s), odp_key_fitness_to_string(fitness));
1147 /* Force unwildcard the in_port. */
1148 mask->in_port.odp_port = u32_to_odp(UINT32_MAX);
1150 enum mf_field_id id;
1151 /* No mask key, unwildcard everything except fields whose
1152 * prerequisities are not met. */
1153 memset(mask, 0x0, sizeof *mask);
1155 for (id = 0; id < MFF_N_IDS; ++id) {
1156 /* Skip registers and metadata. */
1157 if (!(id >= MFF_REG0 && id < MFF_REG0 + FLOW_N_REGS)
1158 && id != MFF_METADATA) {
1159 const struct mf_field *mf = mf_from_id(id);
1160 if (mf_are_prereqs_ok(mf, flow)) {
1161 mf_mask_field(mf, mask);
1171 dpif_netdev_flow_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1176 if (odp_flow_key_to_flow(key, key_len, flow)) {
1177 /* This should not happen: it indicates that odp_flow_key_from_flow()
1178 * and odp_flow_key_to_flow() disagree on the acceptable form of a
1179 * flow. Log the problem as an error, with enough details to enable
1181 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1183 if (!VLOG_DROP_ERR(&rl)) {
1187 odp_flow_format(key, key_len, NULL, 0, NULL, &s, true);
1188 VLOG_ERR("internal error parsing flow key %s", ds_cstr(&s));
1195 in_port = flow->in_port.odp_port;
1196 if (!is_valid_port_number(in_port) && in_port != ODPP_NONE) {
1204 dpif_netdev_flow_get(const struct dpif *dpif,
1205 const struct nlattr *nl_key, size_t nl_key_len,
1206 struct ofpbuf **actionsp, struct dpif_flow_stats *stats)
1208 struct dp_netdev *dp = get_dp_netdev(dpif);
1209 struct dp_netdev_flow *netdev_flow;
1213 error = dpif_netdev_flow_from_nlattrs(nl_key, nl_key_len, &key);
1218 fat_rwlock_rdlock(&dp->cls.rwlock);
1219 netdev_flow = dp_netdev_find_flow(dp, &key);
1220 fat_rwlock_unlock(&dp->cls.rwlock);
1224 get_dpif_flow_stats(netdev_flow, stats);
1228 struct dp_netdev_actions *actions;
1230 actions = dp_netdev_flow_get_actions(netdev_flow);
1231 *actionsp = ofpbuf_clone_data(actions->actions, actions->size);
1241 dp_netdev_flow_add(struct dp_netdev *dp, const struct flow *flow,
1242 const struct flow_wildcards *wc,
1243 const struct nlattr *actions,
1245 OVS_REQUIRES(dp->flow_mutex)
1247 struct dp_netdev_flow *netdev_flow;
1250 netdev_flow = xzalloc(sizeof *netdev_flow);
1251 *CONST_CAST(struct flow *, &netdev_flow->flow) = *flow;
1253 ovs_mutex_init(&netdev_flow->mutex);
1255 ovsthread_stats_init(&netdev_flow->stats);
1257 ovsrcu_set(&netdev_flow->actions,
1258 dp_netdev_actions_create(actions, actions_len));
1260 match_init(&match, flow, wc);
1261 cls_rule_init(CONST_CAST(struct cls_rule *, &netdev_flow->cr),
1262 &match, NETDEV_RULE_PRIORITY);
1263 fat_rwlock_wrlock(&dp->cls.rwlock);
1264 classifier_insert(&dp->cls,
1265 CONST_CAST(struct cls_rule *, &netdev_flow->cr));
1266 hmap_insert(&dp->flow_table,
1267 CONST_CAST(struct hmap_node *, &netdev_flow->node),
1268 flow_hash(flow, 0));
1269 fat_rwlock_unlock(&dp->cls.rwlock);
1275 clear_stats(struct dp_netdev_flow *netdev_flow)
1277 struct dp_netdev_flow_stats *bucket;
1280 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
1281 ovs_mutex_lock(&bucket->mutex);
1283 bucket->packet_count = 0;
1284 bucket->byte_count = 0;
1285 bucket->tcp_flags = 0;
1286 ovs_mutex_unlock(&bucket->mutex);
1291 dpif_netdev_flow_put(struct dpif *dpif, const struct dpif_flow_put *put)
1293 struct dp_netdev *dp = get_dp_netdev(dpif);
1294 struct dp_netdev_flow *netdev_flow;
1296 struct flow_wildcards wc;
1299 error = dpif_netdev_flow_from_nlattrs(put->key, put->key_len, &flow);
1303 error = dpif_netdev_mask_from_nlattrs(put->key, put->key_len,
1304 put->mask, put->mask_len,
1310 ovs_mutex_lock(&dp->flow_mutex);
1311 netdev_flow = dp_netdev_lookup_flow(dp, &flow);
1313 if (put->flags & DPIF_FP_CREATE) {
1314 if (hmap_count(&dp->flow_table) < MAX_FLOWS) {
1316 memset(put->stats, 0, sizeof *put->stats);
1318 error = dp_netdev_flow_add(dp, &flow, &wc, put->actions,
1327 if (put->flags & DPIF_FP_MODIFY
1328 && flow_equal(&flow, &netdev_flow->flow)) {
1329 struct dp_netdev_actions *new_actions;
1330 struct dp_netdev_actions *old_actions;
1332 new_actions = dp_netdev_actions_create(put->actions,
1335 old_actions = dp_netdev_flow_get_actions(netdev_flow);
1336 ovsrcu_set(&netdev_flow->actions, new_actions);
1339 get_dpif_flow_stats(netdev_flow, put->stats);
1341 if (put->flags & DPIF_FP_ZERO_STATS) {
1342 clear_stats(netdev_flow);
1345 ovsrcu_postpone(dp_netdev_actions_free, old_actions);
1346 } else if (put->flags & DPIF_FP_CREATE) {
1349 /* Overlapping flow. */
1353 ovs_mutex_unlock(&dp->flow_mutex);
1359 dpif_netdev_flow_del(struct dpif *dpif, const struct dpif_flow_del *del)
1361 struct dp_netdev *dp = get_dp_netdev(dpif);
1362 struct dp_netdev_flow *netdev_flow;
1366 error = dpif_netdev_flow_from_nlattrs(del->key, del->key_len, &key);
1371 ovs_mutex_lock(&dp->flow_mutex);
1372 fat_rwlock_wrlock(&dp->cls.rwlock);
1373 netdev_flow = dp_netdev_find_flow(dp, &key);
1376 get_dpif_flow_stats(netdev_flow, del->stats);
1378 dp_netdev_remove_flow(dp, netdev_flow);
1382 fat_rwlock_unlock(&dp->cls.rwlock);
1383 ovs_mutex_unlock(&dp->flow_mutex);
1388 struct dp_netdev_flow_state {
1389 struct dp_netdev_actions *actions;
1390 struct odputil_keybuf keybuf;
1391 struct odputil_keybuf maskbuf;
1392 struct dpif_flow_stats stats;
1395 struct dp_netdev_flow_iter {
1399 struct ovs_mutex mutex;
1403 dpif_netdev_flow_dump_state_init(void **statep)
1405 struct dp_netdev_flow_state *state;
1407 *statep = state = xmalloc(sizeof *state);
1408 state->actions = NULL;
1412 dpif_netdev_flow_dump_state_uninit(void *state_)
1414 struct dp_netdev_flow_state *state = state_;
1420 dpif_netdev_flow_dump_start(const struct dpif *dpif OVS_UNUSED, void **iterp)
1422 struct dp_netdev_flow_iter *iter;
1424 *iterp = iter = xmalloc(sizeof *iter);
1428 ovs_mutex_init(&iter->mutex);
1432 /* XXX the caller must use 'actions' without quiescing */
1434 dpif_netdev_flow_dump_next(const struct dpif *dpif, void *iter_, void *state_,
1435 const struct nlattr **key, size_t *key_len,
1436 const struct nlattr **mask, size_t *mask_len,
1437 const struct nlattr **actions, size_t *actions_len,
1438 const struct dpif_flow_stats **stats)
1440 struct dp_netdev_flow_iter *iter = iter_;
1441 struct dp_netdev_flow_state *state = state_;
1442 struct dp_netdev *dp = get_dp_netdev(dpif);
1443 struct dp_netdev_flow *netdev_flow;
1446 ovs_mutex_lock(&iter->mutex);
1447 error = iter->status;
1449 struct hmap_node *node;
1451 fat_rwlock_rdlock(&dp->cls.rwlock);
1452 node = hmap_at_position(&dp->flow_table, &iter->bucket, &iter->offset);
1454 netdev_flow = CONTAINER_OF(node, struct dp_netdev_flow, node);
1456 fat_rwlock_unlock(&dp->cls.rwlock);
1458 iter->status = error = EOF;
1461 ovs_mutex_unlock(&iter->mutex);
1469 ofpbuf_use_stack(&buf, &state->keybuf, sizeof state->keybuf);
1470 odp_flow_key_from_flow(&buf, &netdev_flow->flow,
1471 netdev_flow->flow.in_port.odp_port);
1474 *key_len = buf.size;
1479 struct flow_wildcards wc;
1481 ofpbuf_use_stack(&buf, &state->maskbuf, sizeof state->maskbuf);
1482 minimask_expand(&netdev_flow->cr.match.mask, &wc);
1483 odp_flow_key_from_mask(&buf, &wc.masks, &netdev_flow->flow,
1484 odp_to_u32(wc.masks.in_port.odp_port),
1488 *mask_len = buf.size;
1491 if (actions || stats) {
1492 state->actions = NULL;
1495 state->actions = dp_netdev_flow_get_actions(netdev_flow);
1496 *actions = state->actions->actions;
1497 *actions_len = state->actions->size;
1501 get_dpif_flow_stats(netdev_flow, &state->stats);
1502 *stats = &state->stats;
1510 dpif_netdev_flow_dump_done(const struct dpif *dpif OVS_UNUSED, void *iter_)
1512 struct dp_netdev_flow_iter *iter = iter_;
1514 ovs_mutex_destroy(&iter->mutex);
1520 dpif_netdev_execute(struct dpif *dpif, struct dpif_execute *execute)
1522 struct dp_netdev *dp = get_dp_netdev(dpif);
1523 struct pkt_metadata *md = &execute->md;
1526 if (execute->packet->size < ETH_HEADER_LEN ||
1527 execute->packet->size > UINT16_MAX) {
1531 /* Extract flow key. */
1532 flow_extract(execute->packet, md, &key);
1534 ovs_rwlock_rdlock(&dp->port_rwlock);
1535 dp_netdev_execute_actions(dp, &key, execute->packet, false, md,
1536 execute->actions, execute->actions_len);
1537 ovs_rwlock_unlock(&dp->port_rwlock);
1543 dp_netdev_destroy_all_queues(struct dp_netdev *dp)
1544 OVS_REQ_WRLOCK(dp->queue_rwlock)
1548 dp_netdev_purge_queues(dp);
1550 for (i = 0; i < dp->n_handlers; i++) {
1551 struct dp_netdev_queue *q = &dp->handler_queues[i];
1553 ovs_mutex_destroy(&q->mutex);
1554 seq_destroy(q->seq);
1556 free(dp->handler_queues);
1557 dp->handler_queues = NULL;
1562 dp_netdev_refresh_queues(struct dp_netdev *dp, uint32_t n_handlers)
1563 OVS_REQ_WRLOCK(dp->queue_rwlock)
1565 if (dp->n_handlers != n_handlers) {
1568 dp_netdev_destroy_all_queues(dp);
1570 dp->n_handlers = n_handlers;
1571 dp->handler_queues = xzalloc(n_handlers * sizeof *dp->handler_queues);
1573 for (i = 0; i < n_handlers; i++) {
1574 struct dp_netdev_queue *q = &dp->handler_queues[i];
1576 ovs_mutex_init(&q->mutex);
1577 q->seq = seq_create();
1583 dpif_netdev_recv_set(struct dpif *dpif, bool enable)
1585 struct dp_netdev *dp = get_dp_netdev(dpif);
1587 if ((dp->handler_queues != NULL) == enable) {
1591 fat_rwlock_wrlock(&dp->queue_rwlock);
1593 dp_netdev_destroy_all_queues(dp);
1595 dp_netdev_refresh_queues(dp, 1);
1597 fat_rwlock_unlock(&dp->queue_rwlock);
1603 dpif_netdev_handlers_set(struct dpif *dpif, uint32_t n_handlers)
1605 struct dp_netdev *dp = get_dp_netdev(dpif);
1607 fat_rwlock_wrlock(&dp->queue_rwlock);
1608 if (dp->handler_queues) {
1609 dp_netdev_refresh_queues(dp, n_handlers);
1611 fat_rwlock_unlock(&dp->queue_rwlock);
1617 dpif_netdev_queue_to_priority(const struct dpif *dpif OVS_UNUSED,
1618 uint32_t queue_id, uint32_t *priority)
1620 *priority = queue_id;
1625 dp_netdev_recv_check(const struct dp_netdev *dp, const uint32_t handler_id)
1626 OVS_REQ_RDLOCK(dp->queue_rwlock)
1628 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1630 if (!dp->handler_queues) {
1631 VLOG_WARN_RL(&rl, "receiving upcall disabled");
1635 if (handler_id >= dp->n_handlers) {
1636 VLOG_WARN_RL(&rl, "handler index out of bound");
1644 dpif_netdev_recv(struct dpif *dpif, uint32_t handler_id,
1645 struct dpif_upcall *upcall, struct ofpbuf *buf)
1647 struct dp_netdev *dp = get_dp_netdev(dpif);
1648 struct dp_netdev_queue *q;
1651 fat_rwlock_rdlock(&dp->queue_rwlock);
1653 if (!dp_netdev_recv_check(dp, handler_id)) {
1658 q = &dp->handler_queues[handler_id];
1659 ovs_mutex_lock(&q->mutex);
1660 if (q->head != q->tail) {
1661 struct dp_netdev_upcall *u = &q->upcalls[q->tail++ & QUEUE_MASK];
1663 *upcall = u->upcall;
1670 ovs_mutex_unlock(&q->mutex);
1673 fat_rwlock_unlock(&dp->queue_rwlock);
1679 dpif_netdev_recv_wait(struct dpif *dpif, uint32_t handler_id)
1681 struct dp_netdev *dp = get_dp_netdev(dpif);
1682 struct dp_netdev_queue *q;
1685 fat_rwlock_rdlock(&dp->queue_rwlock);
1687 if (!dp_netdev_recv_check(dp, handler_id)) {
1691 q = &dp->handler_queues[handler_id];
1692 ovs_mutex_lock(&q->mutex);
1693 seq = seq_read(q->seq);
1694 if (q->head != q->tail) {
1695 poll_immediate_wake();
1697 seq_wait(q->seq, seq);
1700 ovs_mutex_unlock(&q->mutex);
1703 fat_rwlock_unlock(&dp->queue_rwlock);
1707 dpif_netdev_recv_purge(struct dpif *dpif)
1709 struct dpif_netdev *dpif_netdev = dpif_netdev_cast(dpif);
1711 fat_rwlock_wrlock(&dpif_netdev->dp->queue_rwlock);
1712 dp_netdev_purge_queues(dpif_netdev->dp);
1713 fat_rwlock_unlock(&dpif_netdev->dp->queue_rwlock);
1716 /* Creates and returns a new 'struct dp_netdev_actions', with a reference count
1717 * of 1, whose actions are a copy of from the 'ofpacts_len' bytes of
1719 struct dp_netdev_actions *
1720 dp_netdev_actions_create(const struct nlattr *actions, size_t size)
1722 struct dp_netdev_actions *netdev_actions;
1724 netdev_actions = xmalloc(sizeof *netdev_actions);
1725 netdev_actions->actions = xmemdup(actions, size);
1726 netdev_actions->size = size;
1728 return netdev_actions;
1731 struct dp_netdev_actions *
1732 dp_netdev_flow_get_actions(const struct dp_netdev_flow *flow)
1734 return ovsrcu_get(struct dp_netdev_actions *, &flow->actions);
1738 dp_netdev_actions_free(struct dp_netdev_actions *actions)
1740 free(actions->actions);
1746 dp_netdev_process_rxq_port(struct dp_netdev *dp,
1747 struct dp_netdev_port *port,
1748 struct netdev_rxq *rxq)
1750 struct ofpbuf *packet[NETDEV_MAX_RX_BATCH];
1753 error = netdev_rxq_recv(rxq, packet, &c);
1755 struct pkt_metadata md = PKT_METADATA_INITIALIZER(port->port_no);
1758 for (i = 0; i < c; i++) {
1759 dp_netdev_port_input(dp, packet[i], &md);
1761 } else if (error != EAGAIN && error != EOPNOTSUPP) {
1762 static struct vlog_rate_limit rl
1763 = VLOG_RATE_LIMIT_INIT(1, 5);
1765 VLOG_ERR_RL(&rl, "error receiving data from %s: %s",
1766 netdev_get_name(port->netdev),
1767 ovs_strerror(error));
1772 dpif_netdev_run(struct dpif *dpif)
1774 struct dp_netdev_port *port;
1775 struct dp_netdev *dp = get_dp_netdev(dpif);
1777 ovs_rwlock_rdlock(&dp->port_rwlock);
1779 HMAP_FOR_EACH (port, node, &dp->ports) {
1780 if (!netdev_is_pmd(port->netdev)) {
1783 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
1784 dp_netdev_process_rxq_port(dp, port, port->rxq[i]);
1789 ovs_rwlock_unlock(&dp->port_rwlock);
1793 dpif_netdev_wait(struct dpif *dpif)
1795 struct dp_netdev_port *port;
1796 struct dp_netdev *dp = get_dp_netdev(dpif);
1798 ovs_rwlock_rdlock(&dp->port_rwlock);
1800 HMAP_FOR_EACH (port, node, &dp->ports) {
1801 if (!netdev_is_pmd(port->netdev)) {
1804 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
1805 netdev_rxq_wait(port->rxq[i]);
1809 ovs_rwlock_unlock(&dp->port_rwlock);
1813 struct dp_netdev_port *port;
1814 struct netdev_rxq *rx;
1818 pmd_load_queues(struct pmd_thread *f,
1819 struct rxq_poll **ppoll_list, int poll_cnt)
1821 struct dp_netdev *dp = f->dp;
1822 struct rxq_poll *poll_list = *ppoll_list;
1823 struct dp_netdev_port *port;
1828 /* Simple scheduler for netdev rx polling. */
1829 ovs_rwlock_rdlock(&dp->port_rwlock);
1830 for (i = 0; i < poll_cnt; i++) {
1831 port_unref(poll_list[i].port);
1837 HMAP_FOR_EACH (port, node, &f->dp->ports) {
1838 if (netdev_is_pmd(port->netdev)) {
1841 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
1842 if ((index % dp->n_pmd_threads) == id) {
1843 poll_list = xrealloc(poll_list, sizeof *poll_list * (poll_cnt + 1));
1846 poll_list[poll_cnt].port = port;
1847 poll_list[poll_cnt].rx = port->rxq[i];
1855 ovs_rwlock_unlock(&dp->port_rwlock);
1856 *ppoll_list = poll_list;
1861 pmd_thread_main(void *f_)
1863 struct pmd_thread *f = f_;
1864 struct dp_netdev *dp = f->dp;
1865 unsigned int lc = 0;
1866 struct rxq_poll *poll_list;
1867 unsigned int port_seq;
1871 f->name = xasprintf("pmd_%u", ovsthread_id_self());
1872 set_subprogram_name("%s", f->name);
1876 pmd_thread_setaffinity_cpu(f->id);
1878 poll_cnt = pmd_load_queues(f, &poll_list, poll_cnt);
1879 atomic_read(&f->change_seq, &port_seq);
1882 unsigned int c_port_seq;
1885 for (i = 0; i < poll_cnt; i++) {
1886 dp_netdev_process_rxq_port(dp, poll_list[i].port, poll_list[i].rx);
1892 /* TODO: need completely userspace based signaling method.
1893 * to keep this thread entirely in userspace.
1894 * For now using atomic counter. */
1896 atomic_read_explicit(&f->change_seq, &c_port_seq, memory_order_consume);
1897 if (c_port_seq != port_seq) {
1903 if (!latch_is_set(&f->dp->exit_latch)){
1907 for (i = 0; i < poll_cnt; i++) {
1908 port_unref(poll_list[i].port);
1917 dp_netdev_set_pmd_threads(struct dp_netdev *dp, int n)
1921 if (n == dp->n_pmd_threads) {
1925 /* Stop existing threads. */
1926 latch_set(&dp->exit_latch);
1927 dp_netdev_reload_pmd_threads(dp);
1928 for (i = 0; i < dp->n_pmd_threads; i++) {
1929 struct pmd_thread *f = &dp->pmd_threads[i];
1931 xpthread_join(f->thread, NULL);
1933 latch_poll(&dp->exit_latch);
1934 free(dp->pmd_threads);
1936 /* Start new threads. */
1937 dp->pmd_threads = xmalloc(n * sizeof *dp->pmd_threads);
1938 dp->n_pmd_threads = n;
1940 for (i = 0; i < n; i++) {
1941 struct pmd_thread *f = &dp->pmd_threads[i];
1945 atomic_store(&f->change_seq, 1);
1947 /* Each thread will distribute all devices rx-queues among
1949 xpthread_create(&f->thread, NULL, pmd_thread_main, f);
1955 dp_netdev_flow_stats_new_cb(void)
1957 struct dp_netdev_flow_stats *bucket = xzalloc_cacheline(sizeof *bucket);
1958 ovs_mutex_init(&bucket->mutex);
1963 dp_netdev_flow_used(struct dp_netdev_flow *netdev_flow,
1964 const struct ofpbuf *packet,
1965 const struct flow *key)
1967 uint16_t tcp_flags = ntohs(key->tcp_flags);
1968 long long int now = time_msec();
1969 struct dp_netdev_flow_stats *bucket;
1971 bucket = ovsthread_stats_bucket_get(&netdev_flow->stats,
1972 dp_netdev_flow_stats_new_cb);
1974 ovs_mutex_lock(&bucket->mutex);
1975 bucket->used = MAX(now, bucket->used);
1976 bucket->packet_count++;
1977 bucket->byte_count += packet->size;
1978 bucket->tcp_flags |= tcp_flags;
1979 ovs_mutex_unlock(&bucket->mutex);
1983 dp_netdev_stats_new_cb(void)
1985 struct dp_netdev_stats *bucket = xzalloc_cacheline(sizeof *bucket);
1986 ovs_mutex_init(&bucket->mutex);
1991 dp_netdev_count_packet(struct dp_netdev *dp, enum dp_stat_type type)
1993 struct dp_netdev_stats *bucket;
1995 bucket = ovsthread_stats_bucket_get(&dp->stats, dp_netdev_stats_new_cb);
1996 ovs_mutex_lock(&bucket->mutex);
1998 ovs_mutex_unlock(&bucket->mutex);
2002 dp_netdev_port_input(struct dp_netdev *dp, struct ofpbuf *packet,
2003 struct pkt_metadata *md)
2005 struct dp_netdev_flow *netdev_flow;
2008 if (packet->size < ETH_HEADER_LEN) {
2009 ofpbuf_delete(packet);
2012 flow_extract(packet, md, &key);
2013 netdev_flow = dp_netdev_lookup_flow(dp, &key);
2015 struct dp_netdev_actions *actions;
2017 dp_netdev_flow_used(netdev_flow, packet, &key);
2019 actions = dp_netdev_flow_get_actions(netdev_flow);
2020 dp_netdev_execute_actions(dp, &key, packet, true, md,
2021 actions->actions, actions->size);
2022 dp_netdev_count_packet(dp, DP_STAT_HIT);
2023 } else if (dp->handler_queues) {
2024 dp_netdev_count_packet(dp, DP_STAT_MISS);
2025 dp_netdev_output_userspace(dp, packet,
2026 flow_hash_5tuple(&key, 0) % dp->n_handlers,
2027 DPIF_UC_MISS, &key, NULL);
2028 ofpbuf_delete(packet);
2033 dp_netdev_output_userspace(struct dp_netdev *dp, struct ofpbuf *packet,
2034 int queue_no, int type, const struct flow *flow,
2035 const struct nlattr *userdata)
2037 struct dp_netdev_queue *q;
2040 fat_rwlock_rdlock(&dp->queue_rwlock);
2041 q = &dp->handler_queues[queue_no];
2042 ovs_mutex_lock(&q->mutex);
2043 if (q->head - q->tail < MAX_QUEUE_LEN) {
2044 struct dp_netdev_upcall *u = &q->upcalls[q->head++ & QUEUE_MASK];
2045 struct dpif_upcall *upcall = &u->upcall;
2046 struct ofpbuf *buf = &u->buf;
2049 upcall->type = type;
2051 /* Allocate buffer big enough for everything. */
2052 buf_size = ODPUTIL_FLOW_KEY_BYTES;
2054 buf_size += NLA_ALIGN(userdata->nla_len);
2056 buf_size += packet->size;
2057 ofpbuf_init(buf, buf_size);
2060 odp_flow_key_from_flow(buf, flow, flow->in_port.odp_port);
2061 upcall->key = buf->data;
2062 upcall->key_len = buf->size;
2066 upcall->userdata = ofpbuf_put(buf, userdata,
2067 NLA_ALIGN(userdata->nla_len));
2070 upcall->packet.data = ofpbuf_put(buf, packet->data, packet->size);
2071 upcall->packet.size = packet->size;
2077 dp_netdev_count_packet(dp, DP_STAT_LOST);
2080 ovs_mutex_unlock(&q->mutex);
2081 fat_rwlock_unlock(&dp->queue_rwlock);
2086 struct dp_netdev_execute_aux {
2087 struct dp_netdev *dp;
2088 const struct flow *key;
2092 dp_execute_cb(void *aux_, struct ofpbuf *packet,
2093 struct pkt_metadata *md,
2094 const struct nlattr *a, bool may_steal)
2095 OVS_NO_THREAD_SAFETY_ANALYSIS
2097 struct dp_netdev_execute_aux *aux = aux_;
2098 int type = nl_attr_type(a);
2099 struct dp_netdev_port *p;
2101 switch ((enum ovs_action_attr)type) {
2102 case OVS_ACTION_ATTR_OUTPUT:
2103 p = dp_netdev_lookup_port(aux->dp, u32_to_odp(nl_attr_get_u32(a)));
2105 netdev_send(p->netdev, packet, may_steal);
2109 case OVS_ACTION_ATTR_USERSPACE: {
2110 const struct nlattr *userdata;
2112 userdata = nl_attr_find_nested(a, OVS_USERSPACE_ATTR_USERDATA);
2114 dp_netdev_output_userspace(aux->dp, packet,
2115 flow_hash_5tuple(aux->key, 0)
2116 % aux->dp->n_handlers,
2117 DPIF_UC_ACTION, aux->key,
2121 ofpbuf_delete(packet);
2126 case OVS_ACTION_ATTR_RECIRC: {
2127 const struct ovs_action_recirc *act;
2129 act = nl_attr_get(a);
2130 md->recirc_id = act->recirc_id;
2133 if (act->hash_alg == OVS_RECIRC_HASH_ALG_L4) {
2136 flow_extract(packet, md, &flow);
2137 md->dp_hash = flow_hash_symmetric_l4(&flow, act->hash_bias);
2140 dp_netdev_port_input(aux->dp, packet, md);
2144 case OVS_ACTION_ATTR_PUSH_VLAN:
2145 case OVS_ACTION_ATTR_POP_VLAN:
2146 case OVS_ACTION_ATTR_PUSH_MPLS:
2147 case OVS_ACTION_ATTR_POP_MPLS:
2148 case OVS_ACTION_ATTR_SET:
2149 case OVS_ACTION_ATTR_SAMPLE:
2150 case OVS_ACTION_ATTR_UNSPEC:
2151 case __OVS_ACTION_ATTR_MAX:
2158 dp_netdev_execute_actions(struct dp_netdev *dp, const struct flow *key,
2159 struct ofpbuf *packet, bool may_steal,
2160 struct pkt_metadata *md,
2161 const struct nlattr *actions, size_t actions_len)
2163 struct dp_netdev_execute_aux aux = {dp, key};
2165 odp_execute_actions(&aux, packet, may_steal, md,
2166 actions, actions_len, dp_execute_cb);
2169 #define DPIF_NETDEV_CLASS_FUNCTIONS \
2170 dpif_netdev_enumerate, \
2171 dpif_netdev_port_open_type, \
2173 dpif_netdev_close, \
2174 dpif_netdev_destroy, \
2177 dpif_netdev_get_stats, \
2178 dpif_netdev_port_add, \
2179 dpif_netdev_port_del, \
2180 dpif_netdev_port_query_by_number, \
2181 dpif_netdev_port_query_by_name, \
2182 NULL, /* port_get_pid */ \
2183 dpif_netdev_port_dump_start, \
2184 dpif_netdev_port_dump_next, \
2185 dpif_netdev_port_dump_done, \
2186 dpif_netdev_port_poll, \
2187 dpif_netdev_port_poll_wait, \
2188 dpif_netdev_flow_get, \
2189 dpif_netdev_flow_put, \
2190 dpif_netdev_flow_del, \
2191 dpif_netdev_flow_flush, \
2192 dpif_netdev_flow_dump_state_init, \
2193 dpif_netdev_flow_dump_start, \
2194 dpif_netdev_flow_dump_next, \
2196 dpif_netdev_flow_dump_done, \
2197 dpif_netdev_flow_dump_state_uninit, \
2198 dpif_netdev_execute, \
2199 NULL, /* operate */ \
2200 dpif_netdev_recv_set, \
2201 dpif_netdev_handlers_set, \
2202 dpif_netdev_queue_to_priority, \
2204 dpif_netdev_recv_wait, \
2205 dpif_netdev_recv_purge, \
2207 const struct dpif_class dpif_netdev_class = {
2209 DPIF_NETDEV_CLASS_FUNCTIONS
2212 const struct dpif_class dpif_planetlab_class = {
2214 DPIF_NETDEV_CLASS_FUNCTIONS
2218 dpif_dummy_change_port_number(struct unixctl_conn *conn, int argc OVS_UNUSED,
2219 const char *argv[], void *aux OVS_UNUSED)
2221 struct dp_netdev_port *port;
2222 struct dp_netdev *dp;
2225 ovs_mutex_lock(&dp_netdev_mutex);
2226 dp = shash_find_data(&dp_netdevs, argv[1]);
2227 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
2228 ovs_mutex_unlock(&dp_netdev_mutex);
2229 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
2232 ovs_refcount_ref(&dp->ref_cnt);
2233 ovs_mutex_unlock(&dp_netdev_mutex);
2235 ovs_rwlock_wrlock(&dp->port_rwlock);
2236 if (get_port_by_name(dp, argv[2], &port)) {
2237 unixctl_command_reply_error(conn, "unknown port");
2241 port_no = u32_to_odp(atoi(argv[3]));
2242 if (!port_no || port_no == ODPP_NONE) {
2243 unixctl_command_reply_error(conn, "bad port number");
2246 if (dp_netdev_lookup_port(dp, port_no)) {
2247 unixctl_command_reply_error(conn, "port number already in use");
2250 hmap_remove(&dp->ports, &port->node);
2251 port->port_no = port_no;
2252 hmap_insert(&dp->ports, &port->node, hash_int(odp_to_u32(port_no), 0));
2253 seq_change(dp->port_seq);
2254 unixctl_command_reply(conn, NULL);
2257 ovs_rwlock_unlock(&dp->port_rwlock);
2258 dp_netdev_unref(dp);
2262 dpif_dummy_register__(const char *type)
2264 struct dpif_class *class;
2266 class = xmalloc(sizeof *class);
2267 *class = dpif_netdev_class;
2268 class->type = xstrdup(type);
2269 dp_register_provider(class);
2273 dpif_dummy_register(bool override)
2280 dp_enumerate_types(&types);
2281 SSET_FOR_EACH (type, &types) {
2282 if (!dp_unregister_provider(type)) {
2283 dpif_dummy_register__(type);
2286 sset_destroy(&types);
2289 dpif_dummy_register__("dummy");
2291 unixctl_command_register("dpif-dummy/change-port-number",
2292 "DP PORT NEW-NUMBER",
2293 3, 3, dpif_dummy_change_port_number, NULL);