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;
540 struct cmap_cursor cursor;
543 shash_find_and_delete(&dp_netdevs, dp->name);
545 dp_netdev_set_pmd_threads(dp, 0);
546 free(dp->pmd_threads);
548 dp_netdev_flow_flush(dp);
549 ovs_mutex_lock(&dp->port_mutex);
550 CMAP_FOR_EACH (port, node, &cursor, &dp->ports) {
551 do_del_port(dp, port);
553 ovs_mutex_unlock(&dp->port_mutex);
555 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
556 ovs_mutex_destroy(&bucket->mutex);
557 free_cacheline(bucket);
559 ovsthread_stats_destroy(&dp->stats);
561 fat_rwlock_wrlock(&dp->queue_rwlock);
562 dp_netdev_destroy_all_queues(dp);
563 fat_rwlock_unlock(&dp->queue_rwlock);
565 fat_rwlock_destroy(&dp->queue_rwlock);
567 classifier_destroy(&dp->cls);
568 hmap_destroy(&dp->flow_table);
569 ovs_mutex_destroy(&dp->flow_mutex);
570 seq_destroy(dp->port_seq);
571 cmap_destroy(&dp->ports);
572 latch_destroy(&dp->exit_latch);
573 free(CONST_CAST(char *, dp->name));
578 dp_netdev_unref(struct dp_netdev *dp)
581 /* Take dp_netdev_mutex so that, if dp->ref_cnt falls to zero, we can't
582 * get a new reference to 'dp' through the 'dp_netdevs' shash. */
583 ovs_mutex_lock(&dp_netdev_mutex);
584 if (ovs_refcount_unref(&dp->ref_cnt) == 1) {
587 ovs_mutex_unlock(&dp_netdev_mutex);
592 dpif_netdev_close(struct dpif *dpif)
594 struct dp_netdev *dp = get_dp_netdev(dpif);
601 dpif_netdev_destroy(struct dpif *dpif)
603 struct dp_netdev *dp = get_dp_netdev(dpif);
605 if (!atomic_flag_test_and_set(&dp->destroyed)) {
606 if (ovs_refcount_unref(&dp->ref_cnt) == 1) {
607 /* Can't happen: 'dpif' still owns a reference to 'dp'. */
616 dpif_netdev_get_stats(const struct dpif *dpif, struct dpif_dp_stats *stats)
618 struct dp_netdev *dp = get_dp_netdev(dpif);
619 struct dp_netdev_stats *bucket;
622 fat_rwlock_rdlock(&dp->cls.rwlock);
623 stats->n_flows = hmap_count(&dp->flow_table);
624 fat_rwlock_unlock(&dp->cls.rwlock);
626 stats->n_hit = stats->n_missed = stats->n_lost = 0;
627 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
628 ovs_mutex_lock(&bucket->mutex);
629 stats->n_hit += bucket->n[DP_STAT_HIT];
630 stats->n_missed += bucket->n[DP_STAT_MISS];
631 stats->n_lost += bucket->n[DP_STAT_LOST];
632 ovs_mutex_unlock(&bucket->mutex);
634 stats->n_masks = UINT32_MAX;
635 stats->n_mask_hit = UINT64_MAX;
641 dp_netdev_reload_pmd_threads(struct dp_netdev *dp)
645 for (i = 0; i < dp->n_pmd_threads; i++) {
646 struct pmd_thread *f = &dp->pmd_threads[i];
649 atomic_add(&f->change_seq, 1, &id);
654 hash_port_no(odp_port_t port_no)
656 return hash_int(odp_to_u32(port_no), 0);
660 do_add_port(struct dp_netdev *dp, const char *devname, const char *type,
662 OVS_REQUIRES(dp->port_mutex)
664 struct netdev_saved_flags *sf;
665 struct dp_netdev_port *port;
666 struct netdev *netdev;
667 enum netdev_flags flags;
668 const char *open_type;
672 /* XXX reject devices already in some dp_netdev. */
674 /* Open and validate network device. */
675 open_type = dpif_netdev_port_open_type(dp->class, type);
676 error = netdev_open(devname, open_type, &netdev);
680 /* XXX reject non-Ethernet devices */
682 netdev_get_flags(netdev, &flags);
683 if (flags & NETDEV_LOOPBACK) {
684 VLOG_ERR("%s: cannot add a loopback device", devname);
685 netdev_close(netdev);
689 port = xzalloc(sizeof *port);
690 port->port_no = port_no;
691 port->netdev = netdev;
692 port->rxq = xmalloc(sizeof *port->rxq * netdev_n_rxq(netdev));
693 port->type = xstrdup(type);
694 for (i = 0; i < netdev_n_rxq(netdev); i++) {
695 error = netdev_rxq_open(netdev, &port->rxq[i], i);
697 && !(error == EOPNOTSUPP && dpif_netdev_class_is_dummy(dp->class))) {
698 VLOG_ERR("%s: cannot receive packets on this network device (%s)",
699 devname, ovs_strerror(errno));
700 netdev_close(netdev);
705 error = netdev_turn_flags_on(netdev, NETDEV_PROMISC, &sf);
707 for (i = 0; i < netdev_n_rxq(netdev); i++) {
708 netdev_rxq_close(port->rxq[i]);
710 netdev_close(netdev);
717 if (netdev_is_pmd(netdev)) {
719 dp_netdev_set_pmd_threads(dp, NR_THREADS);
720 dp_netdev_reload_pmd_threads(dp);
722 ovs_refcount_init(&port->ref_cnt);
724 cmap_insert(&dp->ports, &port->node, hash_port_no(port_no));
725 seq_change(dp->port_seq);
731 dpif_netdev_port_add(struct dpif *dpif, struct netdev *netdev,
732 odp_port_t *port_nop)
734 struct dp_netdev *dp = get_dp_netdev(dpif);
735 char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
736 const char *dpif_port;
740 ovs_mutex_lock(&dp->port_mutex);
741 dpif_port = netdev_vport_get_dpif_port(netdev, namebuf, sizeof namebuf);
742 if (*port_nop != ODPP_NONE) {
744 error = dp_netdev_lookup_port(dp, *port_nop) ? EBUSY : 0;
746 port_no = choose_port(dp, dpif_port);
747 error = port_no == ODPP_NONE ? EFBIG : 0;
751 error = do_add_port(dp, dpif_port, netdev_get_type(netdev), port_no);
753 ovs_mutex_unlock(&dp->port_mutex);
759 dpif_netdev_port_del(struct dpif *dpif, odp_port_t port_no)
761 struct dp_netdev *dp = get_dp_netdev(dpif);
764 ovs_mutex_lock(&dp->port_mutex);
765 if (port_no == ODPP_LOCAL) {
768 struct dp_netdev_port *port;
770 error = get_port_by_number(dp, port_no, &port);
772 do_del_port(dp, port);
775 ovs_mutex_unlock(&dp->port_mutex);
781 is_valid_port_number(odp_port_t port_no)
783 return port_no != ODPP_NONE;
786 static struct dp_netdev_port *
787 dp_netdev_lookup_port(const struct dp_netdev *dp, odp_port_t port_no)
789 struct dp_netdev_port *port;
791 CMAP_FOR_EACH_WITH_HASH (port, node, hash_port_no(port_no), &dp->ports) {
792 if (port->port_no == port_no) {
800 get_port_by_number(struct dp_netdev *dp,
801 odp_port_t port_no, struct dp_netdev_port **portp)
803 if (!is_valid_port_number(port_no)) {
807 *portp = dp_netdev_lookup_port(dp, port_no);
808 return *portp ? 0 : ENOENT;
813 port_ref(struct dp_netdev_port *port)
816 ovs_refcount_ref(&port->ref_cnt);
821 port_destroy__(struct dp_netdev_port *port)
826 netdev_close(port->netdev);
827 netdev_restore_flags(port->sf);
829 n_rxq = netdev_n_rxq(port->netdev);
830 for (i = 0; i < n_rxq; i++) {
831 netdev_rxq_close(port->rxq[i]);
839 port_unref(struct dp_netdev_port *port)
841 if (port && ovs_refcount_unref(&port->ref_cnt) == 1) {
842 ovsrcu_postpone(port_destroy__, port);
847 get_port_by_name(struct dp_netdev *dp,
848 const char *devname, struct dp_netdev_port **portp)
849 OVS_REQUIRES(dp->port_mutex)
851 struct dp_netdev_port *port;
852 struct cmap_cursor cursor;
854 CMAP_FOR_EACH (port, node, &cursor, &dp->ports) {
855 if (!strcmp(netdev_get_name(port->netdev), devname)) {
864 do_del_port(struct dp_netdev *dp, struct dp_netdev_port *port)
865 OVS_REQUIRES(dp->port_mutex)
867 cmap_remove(&dp->ports, &port->node, hash_odp_port(port->port_no));
868 seq_change(dp->port_seq);
869 if (netdev_is_pmd(port->netdev)) {
870 dp_netdev_reload_pmd_threads(dp);
877 answer_port_query(const struct dp_netdev_port *port,
878 struct dpif_port *dpif_port)
880 dpif_port->name = xstrdup(netdev_get_name(port->netdev));
881 dpif_port->type = xstrdup(port->type);
882 dpif_port->port_no = port->port_no;
886 dpif_netdev_port_query_by_number(const struct dpif *dpif, odp_port_t port_no,
887 struct dpif_port *dpif_port)
889 struct dp_netdev *dp = get_dp_netdev(dpif);
890 struct dp_netdev_port *port;
893 error = get_port_by_number(dp, port_no, &port);
894 if (!error && dpif_port) {
895 answer_port_query(port, dpif_port);
902 dpif_netdev_port_query_by_name(const struct dpif *dpif, const char *devname,
903 struct dpif_port *dpif_port)
905 struct dp_netdev *dp = get_dp_netdev(dpif);
906 struct dp_netdev_port *port;
909 ovs_mutex_lock(&dp->port_mutex);
910 error = get_port_by_name(dp, devname, &port);
911 if (!error && dpif_port) {
912 answer_port_query(port, dpif_port);
914 ovs_mutex_unlock(&dp->port_mutex);
920 dp_netdev_flow_free(struct dp_netdev_flow *flow)
922 struct dp_netdev_flow_stats *bucket;
925 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &flow->stats) {
926 ovs_mutex_destroy(&bucket->mutex);
927 free_cacheline(bucket);
929 ovsthread_stats_destroy(&flow->stats);
931 cls_rule_destroy(CONST_CAST(struct cls_rule *, &flow->cr));
932 dp_netdev_actions_free(dp_netdev_flow_get_actions(flow));
937 dp_netdev_remove_flow(struct dp_netdev *dp, struct dp_netdev_flow *flow)
938 OVS_REQ_WRLOCK(dp->cls.rwlock)
939 OVS_REQUIRES(dp->flow_mutex)
941 struct cls_rule *cr = CONST_CAST(struct cls_rule *, &flow->cr);
942 struct hmap_node *node = CONST_CAST(struct hmap_node *, &flow->node);
944 classifier_remove(&dp->cls, cr);
945 hmap_remove(&dp->flow_table, node);
946 ovsrcu_postpone(dp_netdev_flow_free, flow);
950 dp_netdev_flow_flush(struct dp_netdev *dp)
952 struct dp_netdev_flow *netdev_flow, *next;
954 ovs_mutex_lock(&dp->flow_mutex);
955 fat_rwlock_wrlock(&dp->cls.rwlock);
956 HMAP_FOR_EACH_SAFE (netdev_flow, next, node, &dp->flow_table) {
957 dp_netdev_remove_flow(dp, netdev_flow);
959 fat_rwlock_unlock(&dp->cls.rwlock);
960 ovs_mutex_unlock(&dp->flow_mutex);
964 dpif_netdev_flow_flush(struct dpif *dpif)
966 struct dp_netdev *dp = get_dp_netdev(dpif);
968 dp_netdev_flow_flush(dp);
972 struct dp_netdev_port_state {
973 struct cmap_position position;
978 dpif_netdev_port_dump_start(const struct dpif *dpif OVS_UNUSED, void **statep)
980 *statep = xzalloc(sizeof(struct dp_netdev_port_state));
985 dpif_netdev_port_dump_next(const struct dpif *dpif, void *state_,
986 struct dpif_port *dpif_port)
988 struct dp_netdev_port_state *state = state_;
989 struct dp_netdev *dp = get_dp_netdev(dpif);
990 struct cmap_node *node;
993 node = cmap_next_position(&dp->ports, &state->position);
995 struct dp_netdev_port *port;
997 port = CONTAINER_OF(node, struct dp_netdev_port, node);
1000 state->name = xstrdup(netdev_get_name(port->netdev));
1001 dpif_port->name = state->name;
1002 dpif_port->type = port->type;
1003 dpif_port->port_no = port->port_no;
1014 dpif_netdev_port_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
1016 struct dp_netdev_port_state *state = state_;
1023 dpif_netdev_port_poll(const struct dpif *dpif_, char **devnamep OVS_UNUSED)
1025 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
1026 uint64_t new_port_seq;
1029 new_port_seq = seq_read(dpif->dp->port_seq);
1030 if (dpif->last_port_seq != new_port_seq) {
1031 dpif->last_port_seq = new_port_seq;
1041 dpif_netdev_port_poll_wait(const struct dpif *dpif_)
1043 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
1045 seq_wait(dpif->dp->port_seq, dpif->last_port_seq);
1048 static struct dp_netdev_flow *
1049 dp_netdev_flow_cast(const struct cls_rule *cr)
1051 return cr ? CONTAINER_OF(cr, struct dp_netdev_flow, cr) : NULL;
1054 static struct dp_netdev_flow *
1055 dp_netdev_lookup_flow(const struct dp_netdev *dp, const struct miniflow *key)
1056 OVS_EXCLUDED(dp->cls.rwlock)
1058 struct dp_netdev_flow *netdev_flow;
1059 struct cls_rule *rule;
1061 fat_rwlock_rdlock(&dp->cls.rwlock);
1062 rule = classifier_lookup_miniflow_first(&dp->cls, key);
1063 netdev_flow = dp_netdev_flow_cast(rule);
1064 fat_rwlock_unlock(&dp->cls.rwlock);
1069 static struct dp_netdev_flow *
1070 dp_netdev_find_flow(const struct dp_netdev *dp, const struct flow *flow)
1071 OVS_REQ_RDLOCK(dp->cls.rwlock)
1073 struct dp_netdev_flow *netdev_flow;
1075 HMAP_FOR_EACH_WITH_HASH (netdev_flow, node, flow_hash(flow, 0),
1077 if (flow_equal(&netdev_flow->flow, flow)) {
1086 get_dpif_flow_stats(struct dp_netdev_flow *netdev_flow,
1087 struct dpif_flow_stats *stats)
1089 struct dp_netdev_flow_stats *bucket;
1092 memset(stats, 0, sizeof *stats);
1093 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
1094 ovs_mutex_lock(&bucket->mutex);
1095 stats->n_packets += bucket->packet_count;
1096 stats->n_bytes += bucket->byte_count;
1097 stats->used = MAX(stats->used, bucket->used);
1098 stats->tcp_flags |= bucket->tcp_flags;
1099 ovs_mutex_unlock(&bucket->mutex);
1104 dpif_netdev_mask_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1105 const struct nlattr *mask_key,
1106 uint32_t mask_key_len, const struct flow *flow,
1110 enum odp_key_fitness fitness;
1112 fitness = odp_flow_key_to_mask(mask_key, mask_key_len, mask, flow);
1114 /* This should not happen: it indicates that
1115 * odp_flow_key_from_mask() and odp_flow_key_to_mask()
1116 * disagree on the acceptable form of a mask. Log the problem
1117 * as an error, with enough details to enable debugging. */
1118 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1120 if (!VLOG_DROP_ERR(&rl)) {
1124 odp_flow_format(key, key_len, mask_key, mask_key_len, NULL, &s,
1126 VLOG_ERR("internal error parsing flow mask %s (%s)",
1127 ds_cstr(&s), odp_key_fitness_to_string(fitness));
1134 enum mf_field_id id;
1135 /* No mask key, unwildcard everything except fields whose
1136 * prerequisities are not met. */
1137 memset(mask, 0x0, sizeof *mask);
1139 for (id = 0; id < MFF_N_IDS; ++id) {
1140 /* Skip registers and metadata. */
1141 if (!(id >= MFF_REG0 && id < MFF_REG0 + FLOW_N_REGS)
1142 && id != MFF_METADATA) {
1143 const struct mf_field *mf = mf_from_id(id);
1144 if (mf_are_prereqs_ok(mf, flow)) {
1145 mf_mask_field(mf, mask);
1151 /* Force unwildcard the in_port.
1153 * We need to do this even in the case where we unwildcard "everything"
1154 * above because "everything" only includes the 16-bit OpenFlow port number
1155 * mask->in_port.ofp_port, which only covers half of the 32-bit datapath
1156 * port number mask->in_port.odp_port. */
1157 mask->in_port.odp_port = u32_to_odp(UINT32_MAX);
1163 dpif_netdev_flow_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1168 if (odp_flow_key_to_flow(key, key_len, flow)) {
1169 /* This should not happen: it indicates that odp_flow_key_from_flow()
1170 * and odp_flow_key_to_flow() disagree on the acceptable form of a
1171 * flow. Log the problem as an error, with enough details to enable
1173 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1175 if (!VLOG_DROP_ERR(&rl)) {
1179 odp_flow_format(key, key_len, NULL, 0, NULL, &s, true);
1180 VLOG_ERR("internal error parsing flow key %s", ds_cstr(&s));
1187 in_port = flow->in_port.odp_port;
1188 if (!is_valid_port_number(in_port) && in_port != ODPP_NONE) {
1196 dpif_netdev_flow_get(const struct dpif *dpif,
1197 const struct nlattr *nl_key, size_t nl_key_len,
1198 struct ofpbuf **actionsp, struct dpif_flow_stats *stats)
1200 struct dp_netdev *dp = get_dp_netdev(dpif);
1201 struct dp_netdev_flow *netdev_flow;
1205 error = dpif_netdev_flow_from_nlattrs(nl_key, nl_key_len, &key);
1210 fat_rwlock_rdlock(&dp->cls.rwlock);
1211 netdev_flow = dp_netdev_find_flow(dp, &key);
1212 fat_rwlock_unlock(&dp->cls.rwlock);
1216 get_dpif_flow_stats(netdev_flow, stats);
1220 struct dp_netdev_actions *actions;
1222 actions = dp_netdev_flow_get_actions(netdev_flow);
1223 *actionsp = ofpbuf_clone_data(actions->actions, actions->size);
1233 dp_netdev_flow_add(struct dp_netdev *dp, const struct flow *flow,
1234 const struct flow_wildcards *wc,
1235 const struct nlattr *actions,
1237 OVS_REQUIRES(dp->flow_mutex)
1239 struct dp_netdev_flow *netdev_flow;
1242 netdev_flow = xzalloc(sizeof *netdev_flow);
1243 *CONST_CAST(struct flow *, &netdev_flow->flow) = *flow;
1245 ovsthread_stats_init(&netdev_flow->stats);
1247 ovsrcu_set(&netdev_flow->actions,
1248 dp_netdev_actions_create(actions, actions_len));
1250 match_init(&match, flow, wc);
1251 cls_rule_init(CONST_CAST(struct cls_rule *, &netdev_flow->cr),
1252 &match, NETDEV_RULE_PRIORITY);
1253 fat_rwlock_wrlock(&dp->cls.rwlock);
1254 classifier_insert(&dp->cls,
1255 CONST_CAST(struct cls_rule *, &netdev_flow->cr));
1256 hmap_insert(&dp->flow_table,
1257 CONST_CAST(struct hmap_node *, &netdev_flow->node),
1258 flow_hash(flow, 0));
1259 fat_rwlock_unlock(&dp->cls.rwlock);
1265 clear_stats(struct dp_netdev_flow *netdev_flow)
1267 struct dp_netdev_flow_stats *bucket;
1270 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
1271 ovs_mutex_lock(&bucket->mutex);
1273 bucket->packet_count = 0;
1274 bucket->byte_count = 0;
1275 bucket->tcp_flags = 0;
1276 ovs_mutex_unlock(&bucket->mutex);
1281 dpif_netdev_flow_put(struct dpif *dpif, const struct dpif_flow_put *put)
1283 struct dp_netdev *dp = get_dp_netdev(dpif);
1284 struct dp_netdev_flow *netdev_flow;
1286 struct miniflow miniflow;
1287 struct flow_wildcards wc;
1290 error = dpif_netdev_flow_from_nlattrs(put->key, put->key_len, &flow);
1294 error = dpif_netdev_mask_from_nlattrs(put->key, put->key_len,
1295 put->mask, put->mask_len,
1300 miniflow_init(&miniflow, &flow);
1302 ovs_mutex_lock(&dp->flow_mutex);
1303 netdev_flow = dp_netdev_lookup_flow(dp, &miniflow);
1305 if (put->flags & DPIF_FP_CREATE) {
1306 if (hmap_count(&dp->flow_table) < MAX_FLOWS) {
1308 memset(put->stats, 0, sizeof *put->stats);
1310 error = dp_netdev_flow_add(dp, &flow, &wc, put->actions,
1319 if (put->flags & DPIF_FP_MODIFY
1320 && flow_equal(&flow, &netdev_flow->flow)) {
1321 struct dp_netdev_actions *new_actions;
1322 struct dp_netdev_actions *old_actions;
1324 new_actions = dp_netdev_actions_create(put->actions,
1327 old_actions = dp_netdev_flow_get_actions(netdev_flow);
1328 ovsrcu_set(&netdev_flow->actions, new_actions);
1331 get_dpif_flow_stats(netdev_flow, put->stats);
1333 if (put->flags & DPIF_FP_ZERO_STATS) {
1334 clear_stats(netdev_flow);
1337 ovsrcu_postpone(dp_netdev_actions_free, old_actions);
1338 } else if (put->flags & DPIF_FP_CREATE) {
1341 /* Overlapping flow. */
1345 ovs_mutex_unlock(&dp->flow_mutex);
1351 dpif_netdev_flow_del(struct dpif *dpif, const struct dpif_flow_del *del)
1353 struct dp_netdev *dp = get_dp_netdev(dpif);
1354 struct dp_netdev_flow *netdev_flow;
1358 error = dpif_netdev_flow_from_nlattrs(del->key, del->key_len, &key);
1363 ovs_mutex_lock(&dp->flow_mutex);
1364 fat_rwlock_wrlock(&dp->cls.rwlock);
1365 netdev_flow = dp_netdev_find_flow(dp, &key);
1368 get_dpif_flow_stats(netdev_flow, del->stats);
1370 dp_netdev_remove_flow(dp, netdev_flow);
1374 fat_rwlock_unlock(&dp->cls.rwlock);
1375 ovs_mutex_unlock(&dp->flow_mutex);
1380 struct dpif_netdev_flow_dump {
1381 struct dpif_flow_dump up;
1385 struct ovs_mutex mutex;
1388 static struct dpif_netdev_flow_dump *
1389 dpif_netdev_flow_dump_cast(struct dpif_flow_dump *dump)
1391 return CONTAINER_OF(dump, struct dpif_netdev_flow_dump, up);
1394 static struct dpif_flow_dump *
1395 dpif_netdev_flow_dump_create(const struct dpif *dpif_)
1397 struct dpif_netdev_flow_dump *dump;
1399 dump = xmalloc(sizeof *dump);
1400 dpif_flow_dump_init(&dump->up, dpif_);
1404 ovs_mutex_init(&dump->mutex);
1410 dpif_netdev_flow_dump_destroy(struct dpif_flow_dump *dump_)
1412 struct dpif_netdev_flow_dump *dump = dpif_netdev_flow_dump_cast(dump_);
1414 ovs_mutex_destroy(&dump->mutex);
1419 struct dpif_netdev_flow_dump_thread {
1420 struct dpif_flow_dump_thread up;
1421 struct dpif_netdev_flow_dump *dump;
1422 struct odputil_keybuf keybuf;
1423 struct odputil_keybuf maskbuf;
1426 static struct dpif_netdev_flow_dump_thread *
1427 dpif_netdev_flow_dump_thread_cast(struct dpif_flow_dump_thread *thread)
1429 return CONTAINER_OF(thread, struct dpif_netdev_flow_dump_thread, up);
1432 static struct dpif_flow_dump_thread *
1433 dpif_netdev_flow_dump_thread_create(struct dpif_flow_dump *dump_)
1435 struct dpif_netdev_flow_dump *dump = dpif_netdev_flow_dump_cast(dump_);
1436 struct dpif_netdev_flow_dump_thread *thread;
1438 thread = xmalloc(sizeof *thread);
1439 dpif_flow_dump_thread_init(&thread->up, &dump->up);
1440 thread->dump = dump;
1445 dpif_netdev_flow_dump_thread_destroy(struct dpif_flow_dump_thread *thread_)
1447 struct dpif_netdev_flow_dump_thread *thread
1448 = dpif_netdev_flow_dump_thread_cast(thread_);
1453 /* XXX the caller must use 'actions' without quiescing */
1455 dpif_netdev_flow_dump_next(struct dpif_flow_dump_thread *thread_,
1456 struct dpif_flow *f, int max_flows OVS_UNUSED)
1458 struct dpif_netdev_flow_dump_thread *thread
1459 = dpif_netdev_flow_dump_thread_cast(thread_);
1460 struct dpif_netdev_flow_dump *dump = thread->dump;
1461 struct dpif_netdev *dpif = dpif_netdev_cast(thread->up.dpif);
1462 struct dp_netdev *dp = get_dp_netdev(&dpif->dpif);
1463 struct dp_netdev_flow *netdev_flow;
1464 struct flow_wildcards wc;
1465 struct dp_netdev_actions *dp_actions;
1469 ovs_mutex_lock(&dump->mutex);
1470 error = dump->status;
1472 struct hmap_node *node;
1474 fat_rwlock_rdlock(&dp->cls.rwlock);
1475 node = hmap_at_position(&dp->flow_table, &dump->bucket, &dump->offset);
1477 netdev_flow = CONTAINER_OF(node, struct dp_netdev_flow, node);
1479 fat_rwlock_unlock(&dp->cls.rwlock);
1481 dump->status = error = EOF;
1484 ovs_mutex_unlock(&dump->mutex);
1489 minimask_expand(&netdev_flow->cr.match.mask, &wc);
1492 ofpbuf_use_stack(&buf, &thread->keybuf, sizeof thread->keybuf);
1493 odp_flow_key_from_flow(&buf, &netdev_flow->flow, &wc.masks,
1494 netdev_flow->flow.in_port.odp_port, true);
1495 f->key = ofpbuf_data(&buf);
1496 f->key_len = ofpbuf_size(&buf);
1499 ofpbuf_use_stack(&buf, &thread->maskbuf, sizeof thread->maskbuf);
1500 odp_flow_key_from_mask(&buf, &wc.masks, &netdev_flow->flow,
1501 odp_to_u32(wc.masks.in_port.odp_port),
1503 f->mask = ofpbuf_data(&buf);
1504 f->mask_len = ofpbuf_size(&buf);
1507 dp_actions = dp_netdev_flow_get_actions(netdev_flow);
1508 f->actions = dp_actions->actions;
1509 f->actions_len = dp_actions->size;
1512 get_dpif_flow_stats(netdev_flow, &f->stats);
1518 dpif_netdev_execute(struct dpif *dpif, struct dpif_execute *execute)
1520 struct dp_netdev *dp = get_dp_netdev(dpif);
1521 struct pkt_metadata *md = &execute->md;
1523 struct miniflow flow;
1524 uint32_t buf[FLOW_U32S];
1527 if (ofpbuf_size(execute->packet) < ETH_HEADER_LEN ||
1528 ofpbuf_size(execute->packet) > UINT16_MAX) {
1532 /* Extract flow key. */
1533 miniflow_initialize(&key.flow, key.buf);
1534 miniflow_extract(execute->packet, md, &key.flow);
1536 dp_netdev_execute_actions(dp, &key.flow, execute->packet, false, md,
1537 execute->actions, execute->actions_len);
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);
1776 struct cmap_cursor cursor;
1778 CMAP_FOR_EACH (port, node, &cursor, &dp->ports) {
1779 if (!netdev_is_pmd(port->netdev)) {
1782 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
1783 dp_netdev_process_rxq_port(dp, port, port->rxq[i]);
1790 dpif_netdev_wait(struct dpif *dpif)
1792 struct dp_netdev_port *port;
1793 struct dp_netdev *dp = get_dp_netdev(dpif);
1794 struct cmap_cursor cursor;
1796 ovs_mutex_lock(&dp_netdev_mutex);
1797 CMAP_FOR_EACH (port, node, &cursor, &dp->ports) {
1798 if (!netdev_is_pmd(port->netdev)) {
1801 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
1802 netdev_rxq_wait(port->rxq[i]);
1806 ovs_mutex_unlock(&dp_netdev_mutex);
1810 struct dp_netdev_port *port;
1811 struct netdev_rxq *rx;
1815 pmd_load_queues(struct pmd_thread *f,
1816 struct rxq_poll **ppoll_list, int poll_cnt)
1818 struct dp_netdev *dp = f->dp;
1819 struct rxq_poll *poll_list = *ppoll_list;
1820 struct dp_netdev_port *port;
1821 struct cmap_cursor cursor;
1826 /* Simple scheduler for netdev rx polling. */
1827 for (i = 0; i < poll_cnt; i++) {
1828 port_unref(poll_list[i].port);
1834 CMAP_FOR_EACH (port, node, &cursor, &f->dp->ports) {
1835 if (netdev_is_pmd(port->netdev)) {
1838 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
1839 if ((index % dp->n_pmd_threads) == id) {
1840 poll_list = xrealloc(poll_list, sizeof *poll_list * (poll_cnt + 1));
1843 poll_list[poll_cnt].port = port;
1844 poll_list[poll_cnt].rx = port->rxq[i];
1852 *ppoll_list = poll_list;
1857 pmd_thread_main(void *f_)
1859 struct pmd_thread *f = f_;
1860 struct dp_netdev *dp = f->dp;
1861 unsigned int lc = 0;
1862 struct rxq_poll *poll_list;
1863 unsigned int port_seq;
1870 pmd_thread_setaffinity_cpu(f->id);
1872 poll_cnt = pmd_load_queues(f, &poll_list, poll_cnt);
1873 atomic_read(&f->change_seq, &port_seq);
1876 unsigned int c_port_seq;
1879 for (i = 0; i < poll_cnt; i++) {
1880 dp_netdev_process_rxq_port(dp, poll_list[i].port, poll_list[i].rx);
1886 /* TODO: need completely userspace based signaling method.
1887 * to keep this thread entirely in userspace.
1888 * For now using atomic counter. */
1890 atomic_read_explicit(&f->change_seq, &c_port_seq, memory_order_consume);
1891 if (c_port_seq != port_seq) {
1897 if (!latch_is_set(&f->dp->exit_latch)){
1901 for (i = 0; i < poll_cnt; i++) {
1902 port_unref(poll_list[i].port);
1910 dp_netdev_set_pmd_threads(struct dp_netdev *dp, int n)
1914 if (n == dp->n_pmd_threads) {
1918 /* Stop existing threads. */
1919 latch_set(&dp->exit_latch);
1920 dp_netdev_reload_pmd_threads(dp);
1921 for (i = 0; i < dp->n_pmd_threads; i++) {
1922 struct pmd_thread *f = &dp->pmd_threads[i];
1924 xpthread_join(f->thread, NULL);
1926 latch_poll(&dp->exit_latch);
1927 free(dp->pmd_threads);
1929 /* Start new threads. */
1930 dp->pmd_threads = xmalloc(n * sizeof *dp->pmd_threads);
1931 dp->n_pmd_threads = n;
1933 for (i = 0; i < n; i++) {
1934 struct pmd_thread *f = &dp->pmd_threads[i];
1938 atomic_store(&f->change_seq, 1);
1940 /* Each thread will distribute all devices rx-queues among
1942 f->thread = ovs_thread_create("pmd", pmd_thread_main, f);
1948 dp_netdev_flow_stats_new_cb(void)
1950 struct dp_netdev_flow_stats *bucket = xzalloc_cacheline(sizeof *bucket);
1951 ovs_mutex_init(&bucket->mutex);
1956 dp_netdev_flow_used(struct dp_netdev_flow *netdev_flow,
1957 const struct ofpbuf *packet,
1958 const struct miniflow *key)
1960 uint16_t tcp_flags = miniflow_get_tcp_flags(key);
1961 long long int now = time_msec();
1962 struct dp_netdev_flow_stats *bucket;
1964 bucket = ovsthread_stats_bucket_get(&netdev_flow->stats,
1965 dp_netdev_flow_stats_new_cb);
1967 ovs_mutex_lock(&bucket->mutex);
1968 bucket->used = MAX(now, bucket->used);
1969 bucket->packet_count++;
1970 bucket->byte_count += ofpbuf_size(packet);
1971 bucket->tcp_flags |= tcp_flags;
1972 ovs_mutex_unlock(&bucket->mutex);
1976 dp_netdev_stats_new_cb(void)
1978 struct dp_netdev_stats *bucket = xzalloc_cacheline(sizeof *bucket);
1979 ovs_mutex_init(&bucket->mutex);
1984 dp_netdev_count_packet(struct dp_netdev *dp, enum dp_stat_type type)
1986 struct dp_netdev_stats *bucket;
1988 bucket = ovsthread_stats_bucket_get(&dp->stats, dp_netdev_stats_new_cb);
1989 ovs_mutex_lock(&bucket->mutex);
1991 ovs_mutex_unlock(&bucket->mutex);
1995 dp_netdev_input(struct dp_netdev *dp, struct ofpbuf *packet,
1996 struct pkt_metadata *md)
1998 struct dp_netdev_flow *netdev_flow;
2000 struct miniflow flow;
2001 uint32_t buf[FLOW_U32S];
2004 if (ofpbuf_size(packet) < ETH_HEADER_LEN) {
2005 ofpbuf_delete(packet);
2008 miniflow_initialize(&key.flow, key.buf);
2009 miniflow_extract(packet, md, &key.flow);
2011 netdev_flow = dp_netdev_lookup_flow(dp, &key.flow);
2013 struct dp_netdev_actions *actions;
2015 dp_netdev_flow_used(netdev_flow, packet, &key.flow);
2017 actions = dp_netdev_flow_get_actions(netdev_flow);
2018 dp_netdev_execute_actions(dp, &key.flow, packet, true, md,
2019 actions->actions, actions->size);
2020 dp_netdev_count_packet(dp, DP_STAT_HIT);
2021 } else if (dp->handler_queues) {
2022 dp_netdev_count_packet(dp, DP_STAT_MISS);
2023 dp_netdev_output_userspace(dp, packet,
2024 miniflow_hash_5tuple(&key.flow, 0)
2026 DPIF_UC_MISS, &key.flow, NULL);
2027 ofpbuf_delete(packet);
2032 dp_netdev_port_input(struct dp_netdev *dp, struct ofpbuf *packet,
2033 struct pkt_metadata *md)
2035 uint32_t *recirc_depth = recirc_depth_get();
2038 dp_netdev_input(dp, packet, md);
2042 dp_netdev_output_userspace(struct dp_netdev *dp, struct ofpbuf *packet,
2043 int queue_no, int type, const struct miniflow *key,
2044 const struct nlattr *userdata)
2046 struct dp_netdev_queue *q;
2049 fat_rwlock_rdlock(&dp->queue_rwlock);
2050 q = &dp->handler_queues[queue_no];
2051 ovs_mutex_lock(&q->mutex);
2052 if (q->head - q->tail < MAX_QUEUE_LEN) {
2053 struct dp_netdev_upcall *u = &q->upcalls[q->head++ & QUEUE_MASK];
2054 struct dpif_upcall *upcall = &u->upcall;
2055 struct ofpbuf *buf = &u->buf;
2059 upcall->type = type;
2061 /* Allocate buffer big enough for everything. */
2062 buf_size = ODPUTIL_FLOW_KEY_BYTES;
2064 buf_size += NLA_ALIGN(userdata->nla_len);
2066 buf_size += ofpbuf_size(packet);
2067 ofpbuf_init(buf, buf_size);
2070 miniflow_expand(key, &flow);
2071 odp_flow_key_from_flow(buf, &flow, NULL, flow.in_port.odp_port, true);
2072 upcall->key = ofpbuf_data(buf);
2073 upcall->key_len = ofpbuf_size(buf);
2077 upcall->userdata = ofpbuf_put(buf, userdata,
2078 NLA_ALIGN(userdata->nla_len));
2081 ofpbuf_set_data(&upcall->packet,
2082 ofpbuf_put(buf, ofpbuf_data(packet), ofpbuf_size(packet)));
2083 ofpbuf_set_size(&upcall->packet, ofpbuf_size(packet));
2089 dp_netdev_count_packet(dp, DP_STAT_LOST);
2092 ovs_mutex_unlock(&q->mutex);
2093 fat_rwlock_unlock(&dp->queue_rwlock);
2098 struct dp_netdev_execute_aux {
2099 struct dp_netdev *dp;
2100 const struct miniflow *key;
2104 dp_execute_cb(void *aux_, struct ofpbuf *packet,
2105 struct pkt_metadata *md,
2106 const struct nlattr *a, bool may_steal)
2107 OVS_NO_THREAD_SAFETY_ANALYSIS
2109 struct dp_netdev_execute_aux *aux = aux_;
2110 int type = nl_attr_type(a);
2111 struct dp_netdev_port *p;
2112 uint32_t *depth = recirc_depth_get();
2114 switch ((enum ovs_action_attr)type) {
2115 case OVS_ACTION_ATTR_OUTPUT:
2116 p = dp_netdev_lookup_port(aux->dp, u32_to_odp(nl_attr_get_u32(a)));
2118 netdev_send(p->netdev, packet, may_steal);
2122 case OVS_ACTION_ATTR_USERSPACE: {
2123 const struct nlattr *userdata;
2125 userdata = nl_attr_find_nested(a, OVS_USERSPACE_ATTR_USERDATA);
2127 dp_netdev_output_userspace(aux->dp, packet,
2128 miniflow_hash_5tuple(aux->key, 0)
2129 % aux->dp->n_handlers,
2130 DPIF_UC_ACTION, aux->key,
2134 ofpbuf_delete(packet);
2139 case OVS_ACTION_ATTR_HASH: {
2140 const struct ovs_action_hash *hash_act;
2143 hash_act = nl_attr_get(a);
2144 if (hash_act->hash_alg == OVS_HASH_ALG_L4) {
2145 /* Hash need not be symmetric, nor does it need to include
2147 hash = miniflow_hash_5tuple(aux->key, hash_act->hash_basis);
2149 hash = 1; /* 0 is not valid */
2153 VLOG_WARN("Unknown hash algorithm specified for the hash action.");
2161 case OVS_ACTION_ATTR_RECIRC:
2162 if (*depth < MAX_RECIRC_DEPTH) {
2163 struct pkt_metadata recirc_md = *md;
2164 struct ofpbuf *recirc_packet;
2166 recirc_packet = may_steal ? packet : ofpbuf_clone(packet);
2167 recirc_md.recirc_id = nl_attr_get_u32(a);
2170 dp_netdev_input(aux->dp, recirc_packet, &recirc_md);
2175 VLOG_WARN("Packet dropped. Max recirculation depth exceeded.");
2179 case OVS_ACTION_ATTR_PUSH_VLAN:
2180 case OVS_ACTION_ATTR_POP_VLAN:
2181 case OVS_ACTION_ATTR_PUSH_MPLS:
2182 case OVS_ACTION_ATTR_POP_MPLS:
2183 case OVS_ACTION_ATTR_SET:
2184 case OVS_ACTION_ATTR_SAMPLE:
2185 case OVS_ACTION_ATTR_UNSPEC:
2186 case __OVS_ACTION_ATTR_MAX:
2192 dp_netdev_execute_actions(struct dp_netdev *dp, const struct miniflow *key,
2193 struct ofpbuf *packet, bool may_steal,
2194 struct pkt_metadata *md,
2195 const struct nlattr *actions, size_t actions_len)
2197 struct dp_netdev_execute_aux aux = {dp, key};
2199 odp_execute_actions(&aux, packet, may_steal, md,
2200 actions, actions_len, dp_execute_cb);
2203 const struct dpif_class dpif_netdev_class = {
2205 dpif_netdev_enumerate,
2206 dpif_netdev_port_open_type,
2209 dpif_netdev_destroy,
2212 dpif_netdev_get_stats,
2213 dpif_netdev_port_add,
2214 dpif_netdev_port_del,
2215 dpif_netdev_port_query_by_number,
2216 dpif_netdev_port_query_by_name,
2217 NULL, /* port_get_pid */
2218 dpif_netdev_port_dump_start,
2219 dpif_netdev_port_dump_next,
2220 dpif_netdev_port_dump_done,
2221 dpif_netdev_port_poll,
2222 dpif_netdev_port_poll_wait,
2223 dpif_netdev_flow_get,
2224 dpif_netdev_flow_put,
2225 dpif_netdev_flow_del,
2226 dpif_netdev_flow_flush,
2227 dpif_netdev_flow_dump_create,
2228 dpif_netdev_flow_dump_destroy,
2229 dpif_netdev_flow_dump_thread_create,
2230 dpif_netdev_flow_dump_thread_destroy,
2231 dpif_netdev_flow_dump_next,
2232 dpif_netdev_execute,
2234 dpif_netdev_recv_set,
2235 dpif_netdev_handlers_set,
2236 dpif_netdev_queue_to_priority,
2238 dpif_netdev_recv_wait,
2239 dpif_netdev_recv_purge,
2243 dpif_dummy_change_port_number(struct unixctl_conn *conn, int argc OVS_UNUSED,
2244 const char *argv[], void *aux OVS_UNUSED)
2246 struct dp_netdev_port *old_port;
2247 struct dp_netdev_port *new_port;
2248 struct dp_netdev *dp;
2251 ovs_mutex_lock(&dp_netdev_mutex);
2252 dp = shash_find_data(&dp_netdevs, argv[1]);
2253 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
2254 ovs_mutex_unlock(&dp_netdev_mutex);
2255 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
2258 ovs_refcount_ref(&dp->ref_cnt);
2259 ovs_mutex_unlock(&dp_netdev_mutex);
2261 ovs_mutex_lock(&dp->port_mutex);
2262 if (get_port_by_name(dp, argv[2], &old_port)) {
2263 unixctl_command_reply_error(conn, "unknown port");
2267 port_no = u32_to_odp(atoi(argv[3]));
2268 if (!port_no || port_no == ODPP_NONE) {
2269 unixctl_command_reply_error(conn, "bad port number");
2272 if (dp_netdev_lookup_port(dp, port_no)) {
2273 unixctl_command_reply_error(conn, "port number already in use");
2277 /* Remove old port. */
2278 cmap_remove(&dp->ports, &old_port->node, hash_port_no(old_port->port_no));
2279 ovsrcu_postpone(free, old_port);
2281 /* Insert new port (cmap semantics mean we cannot re-insert 'old_port'). */
2282 new_port = xmemdup(old_port, sizeof *old_port);
2283 new_port->port_no = port_no;
2284 cmap_insert(&dp->ports, &new_port->node, hash_port_no(port_no));
2286 seq_change(dp->port_seq);
2287 unixctl_command_reply(conn, NULL);
2290 ovs_mutex_unlock(&dp->port_mutex);
2291 dp_netdev_unref(dp);
2295 dpif_dummy_delete_port(struct unixctl_conn *conn, int argc OVS_UNUSED,
2296 const char *argv[], void *aux OVS_UNUSED)
2298 struct dp_netdev_port *port;
2299 struct dp_netdev *dp;
2301 ovs_mutex_lock(&dp_netdev_mutex);
2302 dp = shash_find_data(&dp_netdevs, argv[1]);
2303 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
2304 ovs_mutex_unlock(&dp_netdev_mutex);
2305 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
2308 ovs_refcount_ref(&dp->ref_cnt);
2309 ovs_mutex_unlock(&dp_netdev_mutex);
2311 ovs_mutex_lock(&dp->port_mutex);
2312 if (get_port_by_name(dp, argv[2], &port)) {
2313 unixctl_command_reply_error(conn, "unknown port");
2314 } else if (port->port_no == ODPP_LOCAL) {
2315 unixctl_command_reply_error(conn, "can't delete local port");
2317 do_del_port(dp, port);
2318 unixctl_command_reply(conn, NULL);
2320 ovs_mutex_unlock(&dp->port_mutex);
2322 dp_netdev_unref(dp);
2326 dpif_dummy_register__(const char *type)
2328 struct dpif_class *class;
2330 class = xmalloc(sizeof *class);
2331 *class = dpif_netdev_class;
2332 class->type = xstrdup(type);
2333 dp_register_provider(class);
2337 dpif_dummy_register(bool override)
2344 dp_enumerate_types(&types);
2345 SSET_FOR_EACH (type, &types) {
2346 if (!dp_unregister_provider(type)) {
2347 dpif_dummy_register__(type);
2350 sset_destroy(&types);
2353 dpif_dummy_register__("dummy");
2355 unixctl_command_register("dpif-dummy/change-port-number",
2356 "DP PORT NEW-NUMBER",
2357 3, 3, dpif_dummy_change_port_number, NULL);
2358 unixctl_command_register("dpif-dummy/delete-port", "DP PORT",
2359 2, 2, dpif_dummy_delete_port, NULL);