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"
41 #include "fat-rwlock.h"
46 #include "meta-flow.h"
48 #include "netdev-dpdk.h"
49 #include "netdev-vport.h"
51 #include "odp-execute.h"
53 #include "ofp-print.h"
56 #include "packet-dpif.h"
58 #include "poll-loop.h"
68 VLOG_DEFINE_THIS_MODULE(dpif_netdev);
70 /* By default, choose a priority in the middle. */
71 #define NETDEV_RULE_PRIORITY 0x8000
73 #define FLOW_DUMP_MAX_BATCH 50
75 /* Use per thread recirc_depth to prevent recirculation loop. */
76 #define MAX_RECIRC_DEPTH 5
77 DEFINE_STATIC_PER_THREAD_DATA(uint32_t, recirc_depth, 0)
79 /* Configuration parameters. */
80 enum { MAX_FLOWS = 65536 }; /* Maximum number of flows in flow table. */
83 enum { MAX_QUEUE_LEN = 128 }; /* Maximum number of packets per queue. */
84 enum { QUEUE_MASK = MAX_QUEUE_LEN - 1 };
85 BUILD_ASSERT_DECL(IS_POW2(MAX_QUEUE_LEN));
87 /* Protects against changes to 'dp_netdevs'. */
88 static struct ovs_mutex dp_netdev_mutex = OVS_MUTEX_INITIALIZER;
90 /* Contains all 'struct dp_netdev's. */
91 static struct shash dp_netdevs OVS_GUARDED_BY(dp_netdev_mutex)
92 = SHASH_INITIALIZER(&dp_netdevs);
94 struct dp_netdev_upcall {
95 struct dpif_upcall upcall; /* Queued upcall information. */
96 struct ofpbuf buf; /* ofpbuf instance for upcall.packet. */
99 /* A queue passing packets from a struct dp_netdev to its clients (handlers).
105 * Any access at all requires the owning 'dp_netdev''s queue_rwlock and
107 struct dp_netdev_queue {
108 struct ovs_mutex mutex;
109 struct seq *seq; /* Incremented whenever a packet is queued. */
110 struct dp_netdev_upcall upcalls[MAX_QUEUE_LEN] OVS_GUARDED;
111 unsigned int head OVS_GUARDED;
112 unsigned int tail OVS_GUARDED;
115 /* Datapath based on the network device interface from netdev.h.
121 * Some members, marked 'const', are immutable. Accessing other members
122 * requires synchronization, as noted in more detail below.
124 * Acquisition order is, from outermost to innermost:
126 * dp_netdev_mutex (global)
132 const struct dpif_class *const class;
133 const char *const name;
134 struct ovs_refcount ref_cnt;
135 atomic_flag destroyed;
139 * Writers of 'flow_table' must take the 'flow_mutex'. Corresponding
140 * changes to 'cls' must be made while still holding the 'flow_mutex'.
142 struct ovs_mutex flow_mutex;
143 struct classifier cls;
144 struct cmap flow_table OVS_GUARDED; /* Flow table. */
148 * 'queue_rwlock' protects the modification of 'handler_queues' and
149 * 'n_handlers'. The queue elements are protected by its
150 * 'handler_queues''s mutex. */
151 struct fat_rwlock queue_rwlock;
152 struct dp_netdev_queue *handler_queues;
157 * ovsthread_stats is internally synchronized. */
158 struct ovsthread_stats stats; /* Contains 'struct dp_netdev_stats *'. */
162 * Protected by RCU. Take the mutex to add or remove ports. */
163 struct ovs_mutex port_mutex;
165 struct seq *port_seq; /* Incremented whenever a port changes. */
167 /* Forwarding threads. */
168 struct latch exit_latch;
169 struct pmd_thread *pmd_threads;
170 size_t n_pmd_threads;
174 static struct dp_netdev_port *dp_netdev_lookup_port(const struct dp_netdev *dp,
178 DP_STAT_HIT, /* Packets that matched in the flow table. */
179 DP_STAT_MISS, /* Packets that did not match. */
180 DP_STAT_LOST, /* Packets not passed up to the client. */
184 /* Contained by struct dp_netdev's 'stats' member. */
185 struct dp_netdev_stats {
186 struct ovs_mutex mutex; /* Protects 'n'. */
188 /* Indexed by DP_STAT_*, protected by 'mutex'. */
189 unsigned long long int n[DP_N_STATS] OVS_GUARDED;
193 /* A port in a netdev-based datapath. */
194 struct dp_netdev_port {
195 struct cmap_node node; /* Node in dp_netdev's 'ports'. */
197 struct netdev *netdev;
198 struct netdev_saved_flags *sf;
199 struct netdev_rxq **rxq;
200 struct ovs_refcount ref_cnt;
201 char *type; /* Port type as requested by user. */
205 /* Stores a miniflow */
207 /* There are fields in the flow structure that we never use. Therefore we can
208 * save a few words of memory */
209 #define NETDEV_KEY_BUF_SIZE_U32 (FLOW_U32S \
210 - FLOW_U32_SIZE(regs) \
211 - FLOW_U32_SIZE(metadata) \
213 struct netdev_flow_key {
214 struct miniflow flow;
215 uint32_t buf[NETDEV_KEY_BUF_SIZE_U32];
218 /* A flow in dp_netdev's 'flow_table'.
224 * Except near the beginning or ending of its lifespan, rule 'rule' belongs to
225 * its dp_netdev's classifier. The text below calls this classifier 'cls'.
230 * The thread safety rules described here for "struct dp_netdev_flow" are
231 * motivated by two goals:
233 * - Prevent threads that read members of "struct dp_netdev_flow" from
234 * reading bad data due to changes by some thread concurrently modifying
237 * - Prevent two threads making changes to members of a given "struct
238 * dp_netdev_flow" from interfering with each other.
244 * A flow 'flow' may be accessed without a risk of being freed by code that
245 * holds a read-lock or write-lock on 'cls->rwlock' or that owns a reference to
246 * 'flow->ref_cnt' (or both). Code that needs to hold onto a flow for a while
247 * should take 'cls->rwlock', find the flow it needs, increment 'flow->ref_cnt'
248 * with dpif_netdev_flow_ref(), and drop 'cls->rwlock'.
250 * 'flow->ref_cnt' protects 'flow' from being freed. It doesn't protect the
251 * flow from being deleted from 'cls' (that's 'cls->rwlock') and it doesn't
252 * protect members of 'flow' from modification.
254 * Some members, marked 'const', are immutable. Accessing other members
255 * requires synchronization, as noted in more detail below.
257 struct dp_netdev_flow {
258 /* Packet classification. */
259 const struct cls_rule cr; /* In owning dp_netdev's 'cls'. */
261 /* Hash table index by unmasked flow. */
262 const struct cmap_node node; /* In owning dp_netdev's 'flow_table'. */
263 const struct flow flow; /* The flow that created this entry. */
267 * Reading or writing these members requires 'mutex'. */
268 struct ovsthread_stats stats; /* Contains "struct dp_netdev_flow_stats". */
271 OVSRCU_TYPE(struct dp_netdev_actions *) actions;
274 static void dp_netdev_flow_free(struct dp_netdev_flow *);
276 /* Contained by struct dp_netdev_flow's 'stats' member. */
277 struct dp_netdev_flow_stats {
278 struct ovs_mutex mutex; /* Guards all the other members. */
280 long long int used OVS_GUARDED; /* Last used time, in monotonic msecs. */
281 long long int packet_count OVS_GUARDED; /* Number of packets matched. */
282 long long int byte_count OVS_GUARDED; /* Number of bytes matched. */
283 uint16_t tcp_flags OVS_GUARDED; /* Bitwise-OR of seen tcp_flags values. */
286 /* A set of datapath actions within a "struct dp_netdev_flow".
292 * A struct dp_netdev_actions 'actions' is protected with RCU. */
293 struct dp_netdev_actions {
294 /* These members are immutable: they do not change during the struct's
296 struct nlattr *actions; /* Sequence of OVS_ACTION_ATTR_* attributes. */
297 unsigned int size; /* Size of 'actions', in bytes. */
300 struct dp_netdev_actions *dp_netdev_actions_create(const struct nlattr *,
302 struct dp_netdev_actions *dp_netdev_flow_get_actions(
303 const struct dp_netdev_flow *);
304 static void dp_netdev_actions_free(struct dp_netdev_actions *);
306 /* PMD: Poll modes drivers. PMD accesses devices via polling to eliminate
307 * the performance overhead of interrupt processing. Therefore netdev can
308 * not implement rx-wait for these devices. dpif-netdev needs to poll
309 * these device to check for recv buffer. pmd-thread does polling for
310 * devices assigned to itself thread.
312 * DPDK used PMD for accessing NIC.
314 * A thread that receives packets from PMD ports, looks them up in the flow
315 * table, and executes the actions it finds.
318 struct dp_netdev *dp;
321 atomic_uint change_seq;
324 /* Interface to netdev-based datapath. */
327 struct dp_netdev *dp;
328 uint64_t last_port_seq;
331 static int get_port_by_number(struct dp_netdev *dp, odp_port_t port_no,
332 struct dp_netdev_port **portp);
333 static int get_port_by_name(struct dp_netdev *dp, const char *devname,
334 struct dp_netdev_port **portp);
335 static void dp_netdev_free(struct dp_netdev *)
336 OVS_REQUIRES(dp_netdev_mutex);
337 static void dp_netdev_flow_flush(struct dp_netdev *);
338 static int do_add_port(struct dp_netdev *dp, const char *devname,
339 const char *type, odp_port_t port_no)
340 OVS_REQUIRES(dp->port_mutex);
341 static void do_del_port(struct dp_netdev *dp, struct dp_netdev_port *)
342 OVS_REQUIRES(dp->port_mutex);
343 static void dp_netdev_destroy_all_queues(struct dp_netdev *dp)
344 OVS_REQ_WRLOCK(dp->queue_rwlock);
345 static int dpif_netdev_open(const struct dpif_class *, const char *name,
346 bool create, struct dpif **);
347 static int dp_netdev_output_userspace(struct dp_netdev *dp, struct ofpbuf **,
348 int cnt, int queue_no, int type,
349 const struct miniflow *,
350 const struct nlattr *userdata);
351 static void dp_netdev_execute_actions(struct dp_netdev *dp,
352 struct dpif_packet **, int c,
353 bool may_steal, struct pkt_metadata *,
354 const struct nlattr *actions,
356 static void dp_netdev_port_input(struct dp_netdev *dp,
357 struct dpif_packet **packets, int cnt,
360 static void dp_netdev_set_pmd_threads(struct dp_netdev *, int n);
362 static struct dpif_netdev *
363 dpif_netdev_cast(const struct dpif *dpif)
365 ovs_assert(dpif->dpif_class->open == dpif_netdev_open);
366 return CONTAINER_OF(dpif, struct dpif_netdev, dpif);
369 static struct dp_netdev *
370 get_dp_netdev(const struct dpif *dpif)
372 return dpif_netdev_cast(dpif)->dp;
376 dpif_netdev_enumerate(struct sset *all_dps,
377 const struct dpif_class *dpif_class)
379 struct shash_node *node;
381 ovs_mutex_lock(&dp_netdev_mutex);
382 SHASH_FOR_EACH(node, &dp_netdevs) {
383 struct dp_netdev *dp = node->data;
384 if (dpif_class != dp->class) {
385 /* 'dp_netdevs' contains both "netdev" and "dummy" dpifs.
386 * If the class doesn't match, skip this dpif. */
389 sset_add(all_dps, node->name);
391 ovs_mutex_unlock(&dp_netdev_mutex);
397 dpif_netdev_class_is_dummy(const struct dpif_class *class)
399 return class != &dpif_netdev_class;
403 dpif_netdev_port_open_type(const struct dpif_class *class, const char *type)
405 return strcmp(type, "internal") ? type
406 : dpif_netdev_class_is_dummy(class) ? "dummy"
411 create_dpif_netdev(struct dp_netdev *dp)
413 uint16_t netflow_id = hash_string(dp->name, 0);
414 struct dpif_netdev *dpif;
416 ovs_refcount_ref(&dp->ref_cnt);
418 dpif = xmalloc(sizeof *dpif);
419 dpif_init(&dpif->dpif, dp->class, dp->name, netflow_id >> 8, netflow_id);
421 dpif->last_port_seq = seq_read(dp->port_seq);
426 /* Choose an unused, non-zero port number and return it on success.
427 * Return ODPP_NONE on failure. */
429 choose_port(struct dp_netdev *dp, const char *name)
430 OVS_REQUIRES(dp->port_mutex)
434 if (dp->class != &dpif_netdev_class) {
438 /* If the port name begins with "br", start the number search at
439 * 100 to make writing tests easier. */
440 if (!strncmp(name, "br", 2)) {
444 /* If the port name contains a number, try to assign that port number.
445 * This can make writing unit tests easier because port numbers are
447 for (p = name; *p != '\0'; p++) {
448 if (isdigit((unsigned char) *p)) {
449 port_no = start_no + strtol(p, NULL, 10);
450 if (port_no > 0 && port_no != odp_to_u32(ODPP_NONE)
451 && !dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
452 return u32_to_odp(port_no);
459 for (port_no = 1; port_no <= UINT16_MAX; port_no++) {
460 if (!dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
461 return u32_to_odp(port_no);
469 create_dp_netdev(const char *name, const struct dpif_class *class,
470 struct dp_netdev **dpp)
471 OVS_REQUIRES(dp_netdev_mutex)
473 struct dp_netdev *dp;
476 dp = xzalloc(sizeof *dp);
477 shash_add(&dp_netdevs, name, dp);
479 *CONST_CAST(const struct dpif_class **, &dp->class) = class;
480 *CONST_CAST(const char **, &dp->name) = xstrdup(name);
481 ovs_refcount_init(&dp->ref_cnt);
482 atomic_flag_clear(&dp->destroyed);
484 ovs_mutex_init(&dp->flow_mutex);
485 classifier_init(&dp->cls, NULL);
486 cmap_init(&dp->flow_table);
488 fat_rwlock_init(&dp->queue_rwlock);
490 ovsthread_stats_init(&dp->stats);
492 ovs_mutex_init(&dp->port_mutex);
493 cmap_init(&dp->ports);
494 dp->port_seq = seq_create();
495 latch_init(&dp->exit_latch);
497 ovs_mutex_lock(&dp->port_mutex);
498 error = do_add_port(dp, name, "internal", ODPP_LOCAL);
499 ovs_mutex_unlock(&dp->port_mutex);
510 dpif_netdev_open(const struct dpif_class *class, const char *name,
511 bool create, struct dpif **dpifp)
513 struct dp_netdev *dp;
516 ovs_mutex_lock(&dp_netdev_mutex);
517 dp = shash_find_data(&dp_netdevs, name);
519 error = create ? create_dp_netdev(name, class, &dp) : ENODEV;
521 error = (dp->class != class ? EINVAL
526 *dpifp = create_dpif_netdev(dp);
528 ovs_mutex_unlock(&dp_netdev_mutex);
534 dp_netdev_purge_queues(struct dp_netdev *dp)
535 OVS_REQ_WRLOCK(dp->queue_rwlock)
539 for (i = 0; i < dp->n_handlers; i++) {
540 struct dp_netdev_queue *q = &dp->handler_queues[i];
542 ovs_mutex_lock(&q->mutex);
543 while (q->tail != q->head) {
544 struct dp_netdev_upcall *u = &q->upcalls[q->tail++ & QUEUE_MASK];
545 ofpbuf_uninit(&u->upcall.packet);
546 ofpbuf_uninit(&u->buf);
548 ovs_mutex_unlock(&q->mutex);
552 /* Requires dp_netdev_mutex so that we can't get a new reference to 'dp'
553 * through the 'dp_netdevs' shash while freeing 'dp'. */
555 dp_netdev_free(struct dp_netdev *dp)
556 OVS_REQUIRES(dp_netdev_mutex)
558 struct dp_netdev_port *port;
559 struct dp_netdev_stats *bucket;
562 shash_find_and_delete(&dp_netdevs, dp->name);
564 dp_netdev_set_pmd_threads(dp, 0);
565 free(dp->pmd_threads);
567 dp_netdev_flow_flush(dp);
568 ovs_mutex_lock(&dp->port_mutex);
569 CMAP_FOR_EACH (port, node, &dp->ports) {
570 do_del_port(dp, port);
572 ovs_mutex_unlock(&dp->port_mutex);
574 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
575 ovs_mutex_destroy(&bucket->mutex);
576 free_cacheline(bucket);
578 ovsthread_stats_destroy(&dp->stats);
580 fat_rwlock_wrlock(&dp->queue_rwlock);
581 dp_netdev_destroy_all_queues(dp);
582 fat_rwlock_unlock(&dp->queue_rwlock);
584 fat_rwlock_destroy(&dp->queue_rwlock);
586 classifier_destroy(&dp->cls);
587 cmap_destroy(&dp->flow_table);
588 ovs_mutex_destroy(&dp->flow_mutex);
589 seq_destroy(dp->port_seq);
590 cmap_destroy(&dp->ports);
591 latch_destroy(&dp->exit_latch);
592 free(CONST_CAST(char *, dp->name));
597 dp_netdev_unref(struct dp_netdev *dp)
600 /* Take dp_netdev_mutex so that, if dp->ref_cnt falls to zero, we can't
601 * get a new reference to 'dp' through the 'dp_netdevs' shash. */
602 ovs_mutex_lock(&dp_netdev_mutex);
603 if (ovs_refcount_unref_relaxed(&dp->ref_cnt) == 1) {
606 ovs_mutex_unlock(&dp_netdev_mutex);
611 dpif_netdev_close(struct dpif *dpif)
613 struct dp_netdev *dp = get_dp_netdev(dpif);
620 dpif_netdev_destroy(struct dpif *dpif)
622 struct dp_netdev *dp = get_dp_netdev(dpif);
624 if (!atomic_flag_test_and_set(&dp->destroyed)) {
625 if (ovs_refcount_unref_relaxed(&dp->ref_cnt) == 1) {
626 /* Can't happen: 'dpif' still owns a reference to 'dp'. */
635 dpif_netdev_get_stats(const struct dpif *dpif, struct dpif_dp_stats *stats)
637 struct dp_netdev *dp = get_dp_netdev(dpif);
638 struct dp_netdev_stats *bucket;
641 stats->n_flows = cmap_count(&dp->flow_table);
643 stats->n_hit = stats->n_missed = stats->n_lost = 0;
644 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
645 ovs_mutex_lock(&bucket->mutex);
646 stats->n_hit += bucket->n[DP_STAT_HIT];
647 stats->n_missed += bucket->n[DP_STAT_MISS];
648 stats->n_lost += bucket->n[DP_STAT_LOST];
649 ovs_mutex_unlock(&bucket->mutex);
651 stats->n_masks = UINT32_MAX;
652 stats->n_mask_hit = UINT64_MAX;
658 dp_netdev_reload_pmd_threads(struct dp_netdev *dp)
662 for (i = 0; i < dp->n_pmd_threads; i++) {
663 struct pmd_thread *f = &dp->pmd_threads[i];
666 atomic_add(&f->change_seq, 1, &id);
671 hash_port_no(odp_port_t port_no)
673 return hash_int(odp_to_u32(port_no), 0);
677 do_add_port(struct dp_netdev *dp, const char *devname, const char *type,
679 OVS_REQUIRES(dp->port_mutex)
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 cmap_insert(&dp->ports, &port->node, hash_port_no(port_no));
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_mutex_lock(&dp->port_mutex);
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_mutex_unlock(&dp->port_mutex);
776 dpif_netdev_port_del(struct dpif *dpif, odp_port_t port_no)
778 struct dp_netdev *dp = get_dp_netdev(dpif);
781 ovs_mutex_lock(&dp->port_mutex);
782 if (port_no == ODPP_LOCAL) {
785 struct dp_netdev_port *port;
787 error = get_port_by_number(dp, port_no, &port);
789 do_del_port(dp, port);
792 ovs_mutex_unlock(&dp->port_mutex);
798 is_valid_port_number(odp_port_t port_no)
800 return port_no != ODPP_NONE;
803 static struct dp_netdev_port *
804 dp_netdev_lookup_port(const struct dp_netdev *dp, odp_port_t port_no)
806 struct dp_netdev_port *port;
808 CMAP_FOR_EACH_WITH_HASH (port, node, hash_port_no(port_no), &dp->ports) {
809 if (port->port_no == port_no) {
817 get_port_by_number(struct dp_netdev *dp,
818 odp_port_t port_no, struct dp_netdev_port **portp)
820 if (!is_valid_port_number(port_no)) {
824 *portp = dp_netdev_lookup_port(dp, port_no);
825 return *portp ? 0 : ENOENT;
830 port_ref(struct dp_netdev_port *port)
833 ovs_refcount_ref(&port->ref_cnt);
838 port_destroy__(struct dp_netdev_port *port)
840 int n_rxq = netdev_n_rxq(port->netdev);
843 netdev_close(port->netdev);
844 netdev_restore_flags(port->sf);
846 for (i = 0; i < n_rxq; i++) {
847 netdev_rxq_close(port->rxq[i]);
855 port_unref(struct dp_netdev_port *port)
857 if (port && ovs_refcount_unref_relaxed(&port->ref_cnt) == 1) {
858 ovsrcu_postpone(port_destroy__, port);
863 get_port_by_name(struct dp_netdev *dp,
864 const char *devname, struct dp_netdev_port **portp)
865 OVS_REQUIRES(dp->port_mutex)
867 struct dp_netdev_port *port;
869 CMAP_FOR_EACH (port, node, &dp->ports) {
870 if (!strcmp(netdev_get_name(port->netdev), devname)) {
879 do_del_port(struct dp_netdev *dp, struct dp_netdev_port *port)
880 OVS_REQUIRES(dp->port_mutex)
882 cmap_remove(&dp->ports, &port->node, hash_odp_port(port->port_no));
883 seq_change(dp->port_seq);
884 if (netdev_is_pmd(port->netdev)) {
885 dp_netdev_reload_pmd_threads(dp);
892 answer_port_query(const struct dp_netdev_port *port,
893 struct dpif_port *dpif_port)
895 dpif_port->name = xstrdup(netdev_get_name(port->netdev));
896 dpif_port->type = xstrdup(port->type);
897 dpif_port->port_no = port->port_no;
901 dpif_netdev_port_query_by_number(const struct dpif *dpif, odp_port_t port_no,
902 struct dpif_port *dpif_port)
904 struct dp_netdev *dp = get_dp_netdev(dpif);
905 struct dp_netdev_port *port;
908 error = get_port_by_number(dp, port_no, &port);
909 if (!error && dpif_port) {
910 answer_port_query(port, dpif_port);
917 dpif_netdev_port_query_by_name(const struct dpif *dpif, const char *devname,
918 struct dpif_port *dpif_port)
920 struct dp_netdev *dp = get_dp_netdev(dpif);
921 struct dp_netdev_port *port;
924 ovs_mutex_lock(&dp->port_mutex);
925 error = get_port_by_name(dp, devname, &port);
926 if (!error && dpif_port) {
927 answer_port_query(port, dpif_port);
929 ovs_mutex_unlock(&dp->port_mutex);
935 dp_netdev_flow_free(struct dp_netdev_flow *flow)
937 struct dp_netdev_flow_stats *bucket;
940 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &flow->stats) {
941 ovs_mutex_destroy(&bucket->mutex);
942 free_cacheline(bucket);
944 ovsthread_stats_destroy(&flow->stats);
946 cls_rule_destroy(CONST_CAST(struct cls_rule *, &flow->cr));
947 dp_netdev_actions_free(dp_netdev_flow_get_actions(flow));
952 dp_netdev_remove_flow(struct dp_netdev *dp, struct dp_netdev_flow *flow)
953 OVS_REQUIRES(dp->flow_mutex)
955 struct cls_rule *cr = CONST_CAST(struct cls_rule *, &flow->cr);
956 struct cmap_node *node = CONST_CAST(struct cmap_node *, &flow->node);
958 classifier_remove(&dp->cls, cr);
959 cmap_remove(&dp->flow_table, node, flow_hash(&flow->flow, 0));
960 ovsrcu_postpone(dp_netdev_flow_free, flow);
964 dp_netdev_flow_flush(struct dp_netdev *dp)
966 struct dp_netdev_flow *netdev_flow, *next;
968 ovs_mutex_lock(&dp->flow_mutex);
969 CMAP_FOR_EACH_SAFE (netdev_flow, next, node, &dp->flow_table) {
970 dp_netdev_remove_flow(dp, netdev_flow);
972 ovs_mutex_unlock(&dp->flow_mutex);
976 dpif_netdev_flow_flush(struct dpif *dpif)
978 struct dp_netdev *dp = get_dp_netdev(dpif);
980 dp_netdev_flow_flush(dp);
984 struct dp_netdev_port_state {
985 struct cmap_position position;
990 dpif_netdev_port_dump_start(const struct dpif *dpif OVS_UNUSED, void **statep)
992 *statep = xzalloc(sizeof(struct dp_netdev_port_state));
997 dpif_netdev_port_dump_next(const struct dpif *dpif, void *state_,
998 struct dpif_port *dpif_port)
1000 struct dp_netdev_port_state *state = state_;
1001 struct dp_netdev *dp = get_dp_netdev(dpif);
1002 struct cmap_node *node;
1005 node = cmap_next_position(&dp->ports, &state->position);
1007 struct dp_netdev_port *port;
1009 port = CONTAINER_OF(node, struct dp_netdev_port, node);
1012 state->name = xstrdup(netdev_get_name(port->netdev));
1013 dpif_port->name = state->name;
1014 dpif_port->type = port->type;
1015 dpif_port->port_no = port->port_no;
1026 dpif_netdev_port_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
1028 struct dp_netdev_port_state *state = state_;
1035 dpif_netdev_port_poll(const struct dpif *dpif_, char **devnamep OVS_UNUSED)
1037 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
1038 uint64_t new_port_seq;
1041 new_port_seq = seq_read(dpif->dp->port_seq);
1042 if (dpif->last_port_seq != new_port_seq) {
1043 dpif->last_port_seq = new_port_seq;
1053 dpif_netdev_port_poll_wait(const struct dpif *dpif_)
1055 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
1057 seq_wait(dpif->dp->port_seq, dpif->last_port_seq);
1060 static struct dp_netdev_flow *
1061 dp_netdev_flow_cast(const struct cls_rule *cr)
1063 return cr ? CONTAINER_OF(cr, struct dp_netdev_flow, cr) : NULL;
1066 static struct dp_netdev_flow *
1067 dp_netdev_lookup_flow(const struct dp_netdev *dp, const struct miniflow *key)
1069 struct dp_netdev_flow *netdev_flow;
1070 struct cls_rule *rule;
1072 classifier_lookup_miniflow_batch(&dp->cls, &key, &rule, 1);
1073 netdev_flow = dp_netdev_flow_cast(rule);
1078 static struct dp_netdev_flow *
1079 dp_netdev_find_flow(const struct dp_netdev *dp, const struct flow *flow)
1081 struct dp_netdev_flow *netdev_flow;
1083 CMAP_FOR_EACH_WITH_HASH (netdev_flow, node, flow_hash(flow, 0),
1085 if (flow_equal(&netdev_flow->flow, flow)) {
1094 get_dpif_flow_stats(struct dp_netdev_flow *netdev_flow,
1095 struct dpif_flow_stats *stats)
1097 struct dp_netdev_flow_stats *bucket;
1100 memset(stats, 0, sizeof *stats);
1101 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
1102 ovs_mutex_lock(&bucket->mutex);
1103 stats->n_packets += bucket->packet_count;
1104 stats->n_bytes += bucket->byte_count;
1105 stats->used = MAX(stats->used, bucket->used);
1106 stats->tcp_flags |= bucket->tcp_flags;
1107 ovs_mutex_unlock(&bucket->mutex);
1112 dpif_netdev_mask_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1113 const struct nlattr *mask_key,
1114 uint32_t mask_key_len, const struct flow *flow,
1118 enum odp_key_fitness fitness;
1120 fitness = odp_flow_key_to_mask(mask_key, mask_key_len, mask, flow);
1122 /* This should not happen: it indicates that
1123 * odp_flow_key_from_mask() and odp_flow_key_to_mask()
1124 * disagree on the acceptable form of a mask. Log the problem
1125 * as an error, with enough details to enable debugging. */
1126 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1128 if (!VLOG_DROP_ERR(&rl)) {
1132 odp_flow_format(key, key_len, mask_key, mask_key_len, NULL, &s,
1134 VLOG_ERR("internal error parsing flow mask %s (%s)",
1135 ds_cstr(&s), odp_key_fitness_to_string(fitness));
1142 enum mf_field_id id;
1143 /* No mask key, unwildcard everything except fields whose
1144 * prerequisities are not met. */
1145 memset(mask, 0x0, sizeof *mask);
1147 for (id = 0; id < MFF_N_IDS; ++id) {
1148 /* Skip registers and metadata. */
1149 if (!(id >= MFF_REG0 && id < MFF_REG0 + FLOW_N_REGS)
1150 && id != MFF_METADATA) {
1151 const struct mf_field *mf = mf_from_id(id);
1152 if (mf_are_prereqs_ok(mf, flow)) {
1153 mf_mask_field(mf, mask);
1159 /* Force unwildcard the in_port.
1161 * We need to do this even in the case where we unwildcard "everything"
1162 * above because "everything" only includes the 16-bit OpenFlow port number
1163 * mask->in_port.ofp_port, which only covers half of the 32-bit datapath
1164 * port number mask->in_port.odp_port. */
1165 mask->in_port.odp_port = u32_to_odp(UINT32_MAX);
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 **bufp,
1207 struct nlattr **maskp, size_t *mask_len,
1208 struct nlattr **actionsp, size_t *actions_len,
1209 struct dpif_flow_stats *stats)
1211 struct dp_netdev *dp = get_dp_netdev(dpif);
1212 struct dp_netdev_flow *netdev_flow;
1216 error = dpif_netdev_flow_from_nlattrs(nl_key, nl_key_len, &key);
1221 netdev_flow = dp_netdev_find_flow(dp, &key);
1225 get_dpif_flow_stats(netdev_flow, stats);
1229 struct flow_wildcards wc;
1231 *bufp = ofpbuf_new(sizeof(struct odputil_keybuf));
1232 minimask_expand(&netdev_flow->cr.match.mask, &wc);
1233 odp_flow_key_from_mask(*bufp, &wc.masks, &netdev_flow->flow,
1234 odp_to_u32(wc.masks.in_port.odp_port),
1236 *maskp = ofpbuf_data(*bufp);
1237 *mask_len = ofpbuf_size(*bufp);
1240 struct dp_netdev_actions *actions;
1242 actions = dp_netdev_flow_get_actions(netdev_flow);
1243 *actionsp = actions->actions;
1244 *actions_len = actions->size;
1254 dp_netdev_flow_add(struct dp_netdev *dp, const struct flow *flow,
1255 const struct flow_wildcards *wc,
1256 const struct nlattr *actions,
1258 OVS_REQUIRES(dp->flow_mutex)
1260 struct dp_netdev_flow *netdev_flow;
1263 netdev_flow = xzalloc(sizeof *netdev_flow);
1264 *CONST_CAST(struct flow *, &netdev_flow->flow) = *flow;
1266 ovsthread_stats_init(&netdev_flow->stats);
1268 ovsrcu_set(&netdev_flow->actions,
1269 dp_netdev_actions_create(actions, actions_len));
1271 match_init(&match, flow, wc);
1272 cls_rule_init(CONST_CAST(struct cls_rule *, &netdev_flow->cr),
1273 &match, NETDEV_RULE_PRIORITY);
1274 cmap_insert(&dp->flow_table,
1275 CONST_CAST(struct cmap_node *, &netdev_flow->node),
1276 flow_hash(flow, 0));
1277 classifier_insert(&dp->cls,
1278 CONST_CAST(struct cls_rule *, &netdev_flow->cr));
1284 clear_stats(struct dp_netdev_flow *netdev_flow)
1286 struct dp_netdev_flow_stats *bucket;
1289 OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
1290 ovs_mutex_lock(&bucket->mutex);
1292 bucket->packet_count = 0;
1293 bucket->byte_count = 0;
1294 bucket->tcp_flags = 0;
1295 ovs_mutex_unlock(&bucket->mutex);
1300 dpif_netdev_flow_put(struct dpif *dpif, const struct dpif_flow_put *put)
1302 struct dp_netdev *dp = get_dp_netdev(dpif);
1303 struct dp_netdev_flow *netdev_flow;
1305 struct miniflow miniflow;
1306 struct flow_wildcards wc;
1309 error = dpif_netdev_flow_from_nlattrs(put->key, put->key_len, &flow);
1313 error = dpif_netdev_mask_from_nlattrs(put->key, put->key_len,
1314 put->mask, put->mask_len,
1319 miniflow_init(&miniflow, &flow);
1321 ovs_mutex_lock(&dp->flow_mutex);
1322 netdev_flow = dp_netdev_lookup_flow(dp, &miniflow);
1324 if (put->flags & DPIF_FP_CREATE) {
1325 if (cmap_count(&dp->flow_table) < MAX_FLOWS) {
1327 memset(put->stats, 0, sizeof *put->stats);
1329 error = dp_netdev_flow_add(dp, &flow, &wc, put->actions,
1338 if (put->flags & DPIF_FP_MODIFY
1339 && flow_equal(&flow, &netdev_flow->flow)) {
1340 struct dp_netdev_actions *new_actions;
1341 struct dp_netdev_actions *old_actions;
1343 new_actions = dp_netdev_actions_create(put->actions,
1346 old_actions = dp_netdev_flow_get_actions(netdev_flow);
1347 ovsrcu_set(&netdev_flow->actions, new_actions);
1350 get_dpif_flow_stats(netdev_flow, put->stats);
1352 if (put->flags & DPIF_FP_ZERO_STATS) {
1353 clear_stats(netdev_flow);
1356 ovsrcu_postpone(dp_netdev_actions_free, old_actions);
1357 } else if (put->flags & DPIF_FP_CREATE) {
1360 /* Overlapping flow. */
1364 ovs_mutex_unlock(&dp->flow_mutex);
1365 miniflow_destroy(&miniflow);
1371 dpif_netdev_flow_del(struct dpif *dpif, const struct dpif_flow_del *del)
1373 struct dp_netdev *dp = get_dp_netdev(dpif);
1374 struct dp_netdev_flow *netdev_flow;
1378 error = dpif_netdev_flow_from_nlattrs(del->key, del->key_len, &key);
1383 ovs_mutex_lock(&dp->flow_mutex);
1384 netdev_flow = dp_netdev_find_flow(dp, &key);
1387 get_dpif_flow_stats(netdev_flow, del->stats);
1389 dp_netdev_remove_flow(dp, netdev_flow);
1393 ovs_mutex_unlock(&dp->flow_mutex);
1398 struct dpif_netdev_flow_dump {
1399 struct dpif_flow_dump up;
1400 struct cmap_position pos;
1402 struct ovs_mutex mutex;
1405 static struct dpif_netdev_flow_dump *
1406 dpif_netdev_flow_dump_cast(struct dpif_flow_dump *dump)
1408 return CONTAINER_OF(dump, struct dpif_netdev_flow_dump, up);
1411 static struct dpif_flow_dump *
1412 dpif_netdev_flow_dump_create(const struct dpif *dpif_)
1414 struct dpif_netdev_flow_dump *dump;
1416 dump = xmalloc(sizeof *dump);
1417 dpif_flow_dump_init(&dump->up, dpif_);
1418 memset(&dump->pos, 0, sizeof dump->pos);
1420 ovs_mutex_init(&dump->mutex);
1426 dpif_netdev_flow_dump_destroy(struct dpif_flow_dump *dump_)
1428 struct dpif_netdev_flow_dump *dump = dpif_netdev_flow_dump_cast(dump_);
1430 ovs_mutex_destroy(&dump->mutex);
1435 struct dpif_netdev_flow_dump_thread {
1436 struct dpif_flow_dump_thread up;
1437 struct dpif_netdev_flow_dump *dump;
1438 struct odputil_keybuf keybuf[FLOW_DUMP_MAX_BATCH];
1439 struct odputil_keybuf maskbuf[FLOW_DUMP_MAX_BATCH];
1442 static struct dpif_netdev_flow_dump_thread *
1443 dpif_netdev_flow_dump_thread_cast(struct dpif_flow_dump_thread *thread)
1445 return CONTAINER_OF(thread, struct dpif_netdev_flow_dump_thread, up);
1448 static struct dpif_flow_dump_thread *
1449 dpif_netdev_flow_dump_thread_create(struct dpif_flow_dump *dump_)
1451 struct dpif_netdev_flow_dump *dump = dpif_netdev_flow_dump_cast(dump_);
1452 struct dpif_netdev_flow_dump_thread *thread;
1454 thread = xmalloc(sizeof *thread);
1455 dpif_flow_dump_thread_init(&thread->up, &dump->up);
1456 thread->dump = dump;
1461 dpif_netdev_flow_dump_thread_destroy(struct dpif_flow_dump_thread *thread_)
1463 struct dpif_netdev_flow_dump_thread *thread
1464 = dpif_netdev_flow_dump_thread_cast(thread_);
1470 dpif_netdev_flow_dump_next(struct dpif_flow_dump_thread *thread_,
1471 struct dpif_flow *flows, int max_flows)
1473 struct dpif_netdev_flow_dump_thread *thread
1474 = dpif_netdev_flow_dump_thread_cast(thread_);
1475 struct dpif_netdev_flow_dump *dump = thread->dump;
1476 struct dpif_netdev *dpif = dpif_netdev_cast(thread->up.dpif);
1477 struct dp_netdev_flow *netdev_flows[FLOW_DUMP_MAX_BATCH];
1478 struct dp_netdev *dp = get_dp_netdev(&dpif->dpif);
1482 ovs_mutex_lock(&dump->mutex);
1483 if (!dump->status) {
1484 for (n_flows = 0; n_flows < MIN(max_flows, FLOW_DUMP_MAX_BATCH);
1486 struct cmap_node *node;
1488 node = cmap_next_position(&dp->flow_table, &dump->pos);
1493 netdev_flows[n_flows] = CONTAINER_OF(node, struct dp_netdev_flow,
1497 ovs_mutex_unlock(&dump->mutex);
1499 for (i = 0; i < n_flows; i++) {
1500 struct odputil_keybuf *maskbuf = &thread->maskbuf[i];
1501 struct odputil_keybuf *keybuf = &thread->keybuf[i];
1502 struct dp_netdev_flow *netdev_flow = netdev_flows[i];
1503 struct dpif_flow *f = &flows[i];
1504 struct dp_netdev_actions *dp_actions;
1505 struct flow_wildcards wc;
1508 minimask_expand(&netdev_flow->cr.match.mask, &wc);
1511 ofpbuf_use_stack(&buf, keybuf, sizeof *keybuf);
1512 odp_flow_key_from_flow(&buf, &netdev_flow->flow, &wc.masks,
1513 netdev_flow->flow.in_port.odp_port, true);
1514 f->key = ofpbuf_data(&buf);
1515 f->key_len = ofpbuf_size(&buf);
1518 ofpbuf_use_stack(&buf, maskbuf, sizeof *maskbuf);
1519 odp_flow_key_from_mask(&buf, &wc.masks, &netdev_flow->flow,
1520 odp_to_u32(wc.masks.in_port.odp_port),
1522 f->mask = ofpbuf_data(&buf);
1523 f->mask_len = ofpbuf_size(&buf);
1526 dp_actions = dp_netdev_flow_get_actions(netdev_flow);
1527 f->actions = dp_actions->actions;
1528 f->actions_len = dp_actions->size;
1531 get_dpif_flow_stats(netdev_flow, &f->stats);
1538 dpif_netdev_execute(struct dpif *dpif, struct dpif_execute *execute)
1540 struct dp_netdev *dp = get_dp_netdev(dpif);
1541 struct dpif_packet packet, *pp;
1542 struct pkt_metadata *md = &execute->md;
1544 if (ofpbuf_size(execute->packet) < ETH_HEADER_LEN ||
1545 ofpbuf_size(execute->packet) > UINT16_MAX) {
1549 packet.ofpbuf = *execute->packet;
1552 dp_netdev_execute_actions(dp, &pp, 1, false, md,
1553 execute->actions, execute->actions_len);
1555 /* Even though may_steal is set to false, some actions could modify or
1556 * reallocate the ofpbuf memory. We need to pass those changes to the
1558 *execute->packet = packet.ofpbuf;
1564 dp_netdev_destroy_all_queues(struct dp_netdev *dp)
1565 OVS_REQ_WRLOCK(dp->queue_rwlock)
1569 dp_netdev_purge_queues(dp);
1571 for (i = 0; i < dp->n_handlers; i++) {
1572 struct dp_netdev_queue *q = &dp->handler_queues[i];
1574 ovs_mutex_destroy(&q->mutex);
1575 seq_destroy(q->seq);
1577 free(dp->handler_queues);
1578 dp->handler_queues = NULL;
1583 dp_netdev_refresh_queues(struct dp_netdev *dp, uint32_t n_handlers)
1584 OVS_REQ_WRLOCK(dp->queue_rwlock)
1586 if (dp->n_handlers != n_handlers) {
1589 dp_netdev_destroy_all_queues(dp);
1591 dp->n_handlers = n_handlers;
1592 dp->handler_queues = xzalloc(n_handlers * sizeof *dp->handler_queues);
1594 for (i = 0; i < n_handlers; i++) {
1595 struct dp_netdev_queue *q = &dp->handler_queues[i];
1597 ovs_mutex_init(&q->mutex);
1598 q->seq = seq_create();
1604 dpif_netdev_recv_set(struct dpif *dpif, bool enable)
1606 struct dp_netdev *dp = get_dp_netdev(dpif);
1608 if ((dp->handler_queues != NULL) == enable) {
1612 fat_rwlock_wrlock(&dp->queue_rwlock);
1614 dp_netdev_destroy_all_queues(dp);
1616 dp_netdev_refresh_queues(dp, 1);
1618 fat_rwlock_unlock(&dp->queue_rwlock);
1624 dpif_netdev_handlers_set(struct dpif *dpif, uint32_t n_handlers)
1626 struct dp_netdev *dp = get_dp_netdev(dpif);
1628 fat_rwlock_wrlock(&dp->queue_rwlock);
1629 if (dp->handler_queues) {
1630 dp_netdev_refresh_queues(dp, n_handlers);
1632 fat_rwlock_unlock(&dp->queue_rwlock);
1638 dpif_netdev_queue_to_priority(const struct dpif *dpif OVS_UNUSED,
1639 uint32_t queue_id, uint32_t *priority)
1641 *priority = queue_id;
1646 dp_netdev_recv_check(const struct dp_netdev *dp, const uint32_t handler_id)
1647 OVS_REQ_RDLOCK(dp->queue_rwlock)
1649 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1651 if (!dp->handler_queues) {
1652 VLOG_WARN_RL(&rl, "receiving upcall disabled");
1656 if (handler_id >= dp->n_handlers) {
1657 VLOG_WARN_RL(&rl, "handler index out of bound");
1665 dpif_netdev_recv(struct dpif *dpif, uint32_t handler_id,
1666 struct dpif_upcall *upcall, struct ofpbuf *buf)
1668 struct dp_netdev *dp = get_dp_netdev(dpif);
1669 struct dp_netdev_queue *q;
1672 fat_rwlock_rdlock(&dp->queue_rwlock);
1674 if (!dp_netdev_recv_check(dp, handler_id)) {
1679 q = &dp->handler_queues[handler_id];
1680 ovs_mutex_lock(&q->mutex);
1681 if (q->head != q->tail) {
1682 struct dp_netdev_upcall *u = &q->upcalls[q->tail++ & QUEUE_MASK];
1684 *upcall = u->upcall;
1691 ovs_mutex_unlock(&q->mutex);
1694 fat_rwlock_unlock(&dp->queue_rwlock);
1700 dpif_netdev_recv_wait(struct dpif *dpif, uint32_t handler_id)
1702 struct dp_netdev *dp = get_dp_netdev(dpif);
1703 struct dp_netdev_queue *q;
1706 fat_rwlock_rdlock(&dp->queue_rwlock);
1708 if (!dp_netdev_recv_check(dp, handler_id)) {
1712 q = &dp->handler_queues[handler_id];
1713 ovs_mutex_lock(&q->mutex);
1714 seq = seq_read(q->seq);
1715 if (q->head != q->tail) {
1716 poll_immediate_wake();
1718 seq_wait(q->seq, seq);
1721 ovs_mutex_unlock(&q->mutex);
1724 fat_rwlock_unlock(&dp->queue_rwlock);
1728 dpif_netdev_recv_purge(struct dpif *dpif)
1730 struct dpif_netdev *dpif_netdev = dpif_netdev_cast(dpif);
1732 fat_rwlock_wrlock(&dpif_netdev->dp->queue_rwlock);
1733 dp_netdev_purge_queues(dpif_netdev->dp);
1734 fat_rwlock_unlock(&dpif_netdev->dp->queue_rwlock);
1737 /* Creates and returns a new 'struct dp_netdev_actions', with a reference count
1738 * of 1, whose actions are a copy of from the 'ofpacts_len' bytes of
1740 struct dp_netdev_actions *
1741 dp_netdev_actions_create(const struct nlattr *actions, size_t size)
1743 struct dp_netdev_actions *netdev_actions;
1745 netdev_actions = xmalloc(sizeof *netdev_actions);
1746 netdev_actions->actions = xmemdup(actions, size);
1747 netdev_actions->size = size;
1749 return netdev_actions;
1752 struct dp_netdev_actions *
1753 dp_netdev_flow_get_actions(const struct dp_netdev_flow *flow)
1755 return ovsrcu_get(struct dp_netdev_actions *, &flow->actions);
1759 dp_netdev_actions_free(struct dp_netdev_actions *actions)
1761 free(actions->actions);
1767 dp_netdev_process_rxq_port(struct dp_netdev *dp,
1768 struct dp_netdev_port *port,
1769 struct netdev_rxq *rxq)
1771 struct dpif_packet *packets[NETDEV_MAX_RX_BATCH];
1774 error = netdev_rxq_recv(rxq, packets, &cnt);
1776 dp_netdev_port_input(dp, packets, cnt, port->port_no);
1777 } else if (error != EAGAIN && error != EOPNOTSUPP) {
1778 static struct vlog_rate_limit rl
1779 = VLOG_RATE_LIMIT_INIT(1, 5);
1781 VLOG_ERR_RL(&rl, "error receiving data from %s: %s",
1782 netdev_get_name(port->netdev),
1783 ovs_strerror(error));
1788 dpif_netdev_run(struct dpif *dpif)
1790 struct dp_netdev_port *port;
1791 struct dp_netdev *dp = get_dp_netdev(dpif);
1793 CMAP_FOR_EACH (port, node, &dp->ports) {
1794 if (!netdev_is_pmd(port->netdev)) {
1797 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
1798 dp_netdev_process_rxq_port(dp, port, port->rxq[i]);
1805 dpif_netdev_wait(struct dpif *dpif)
1807 struct dp_netdev_port *port;
1808 struct dp_netdev *dp = get_dp_netdev(dpif);
1810 ovs_mutex_lock(&dp_netdev_mutex);
1811 CMAP_FOR_EACH (port, node, &dp->ports) {
1812 if (!netdev_is_pmd(port->netdev)) {
1815 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
1816 netdev_rxq_wait(port->rxq[i]);
1820 ovs_mutex_unlock(&dp_netdev_mutex);
1824 struct dp_netdev_port *port;
1825 struct netdev_rxq *rx;
1829 pmd_load_queues(struct pmd_thread *f,
1830 struct rxq_poll **ppoll_list, int poll_cnt)
1832 struct dp_netdev *dp = f->dp;
1833 struct rxq_poll *poll_list = *ppoll_list;
1834 struct dp_netdev_port *port;
1839 /* Simple scheduler for netdev rx polling. */
1840 for (i = 0; i < poll_cnt; i++) {
1841 port_unref(poll_list[i].port);
1847 CMAP_FOR_EACH (port, node, &f->dp->ports) {
1848 if (netdev_is_pmd(port->netdev)) {
1851 for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
1852 if ((index % dp->n_pmd_threads) == id) {
1853 poll_list = xrealloc(poll_list, sizeof *poll_list * (poll_cnt + 1));
1856 poll_list[poll_cnt].port = port;
1857 poll_list[poll_cnt].rx = port->rxq[i];
1865 *ppoll_list = poll_list;
1870 pmd_thread_main(void *f_)
1872 struct pmd_thread *f = f_;
1873 struct dp_netdev *dp = f->dp;
1874 unsigned int lc = 0;
1875 struct rxq_poll *poll_list;
1876 unsigned int port_seq;
1883 pmd_thread_setaffinity_cpu(f->id);
1885 poll_cnt = pmd_load_queues(f, &poll_list, poll_cnt);
1886 atomic_read(&f->change_seq, &port_seq);
1889 unsigned int c_port_seq;
1892 for (i = 0; i < poll_cnt; i++) {
1893 dp_netdev_process_rxq_port(dp, poll_list[i].port, poll_list[i].rx);
1899 /* TODO: need completely userspace based signaling method.
1900 * to keep this thread entirely in userspace.
1901 * For now using atomic counter. */
1903 atomic_read_explicit(&f->change_seq, &c_port_seq, memory_order_consume);
1904 if (c_port_seq != port_seq) {
1910 if (!latch_is_set(&f->dp->exit_latch)){
1914 for (i = 0; i < poll_cnt; i++) {
1915 port_unref(poll_list[i].port);
1923 dp_netdev_set_pmd_threads(struct dp_netdev *dp, int n)
1927 if (n == dp->n_pmd_threads) {
1931 /* Stop existing threads. */
1932 latch_set(&dp->exit_latch);
1933 dp_netdev_reload_pmd_threads(dp);
1934 for (i = 0; i < dp->n_pmd_threads; i++) {
1935 struct pmd_thread *f = &dp->pmd_threads[i];
1937 xpthread_join(f->thread, NULL);
1939 latch_poll(&dp->exit_latch);
1940 free(dp->pmd_threads);
1942 /* Start new threads. */
1943 dp->pmd_threads = xmalloc(n * sizeof *dp->pmd_threads);
1944 dp->n_pmd_threads = n;
1946 for (i = 0; i < n; i++) {
1947 struct pmd_thread *f = &dp->pmd_threads[i];
1951 atomic_store(&f->change_seq, 1);
1953 /* Each thread will distribute all devices rx-queues among
1955 f->thread = ovs_thread_create("pmd", pmd_thread_main, f);
1961 dp_netdev_flow_stats_new_cb(void)
1963 struct dp_netdev_flow_stats *bucket = xzalloc_cacheline(sizeof *bucket);
1964 ovs_mutex_init(&bucket->mutex);
1969 dp_netdev_flow_used(struct dp_netdev_flow *netdev_flow,
1973 long long int now = time_msec();
1974 struct dp_netdev_flow_stats *bucket;
1976 bucket = ovsthread_stats_bucket_get(&netdev_flow->stats,
1977 dp_netdev_flow_stats_new_cb);
1979 ovs_mutex_lock(&bucket->mutex);
1980 bucket->used = MAX(now, bucket->used);
1981 bucket->packet_count += cnt;
1982 bucket->byte_count += size;
1983 bucket->tcp_flags |= tcp_flags;
1984 ovs_mutex_unlock(&bucket->mutex);
1988 dp_netdev_stats_new_cb(void)
1990 struct dp_netdev_stats *bucket = xzalloc_cacheline(sizeof *bucket);
1991 ovs_mutex_init(&bucket->mutex);
1996 dp_netdev_count_packet(struct dp_netdev *dp, enum dp_stat_type type, int cnt)
1998 struct dp_netdev_stats *bucket;
2000 bucket = ovsthread_stats_bucket_get(&dp->stats, dp_netdev_stats_new_cb);
2001 ovs_mutex_lock(&bucket->mutex);
2002 bucket->n[type] += cnt;
2003 ovs_mutex_unlock(&bucket->mutex);
2006 struct packet_batch {
2007 unsigned int packet_count;
2008 unsigned int byte_count;
2011 struct dp_netdev_flow *flow;
2013 struct dpif_packet *packets[NETDEV_MAX_RX_BATCH];
2014 struct pkt_metadata md;
2018 packet_batch_update(struct packet_batch *batch,
2019 struct dpif_packet *packet, const struct miniflow *mf)
2021 batch->tcp_flags |= miniflow_get_tcp_flags(mf);
2022 batch->packets[batch->packet_count++] = packet;
2023 batch->byte_count += ofpbuf_size(&packet->ofpbuf);
2027 packet_batch_init(struct packet_batch *batch, struct dp_netdev_flow *flow,
2028 struct pkt_metadata *md)
2033 batch->packet_count = 0;
2034 batch->byte_count = 0;
2035 batch->tcp_flags = 0;
2039 packet_batch_execute(struct packet_batch *batch, struct dp_netdev *dp)
2041 struct dp_netdev_actions *actions;
2042 struct dp_netdev_flow *flow = batch->flow;
2044 dp_netdev_flow_used(batch->flow, batch->packet_count, batch->byte_count,
2047 actions = dp_netdev_flow_get_actions(flow);
2049 dp_netdev_execute_actions(dp, batch->packets,
2050 batch->packet_count, true, &batch->md,
2051 actions->actions, actions->size);
2053 dp_netdev_count_packet(dp, DP_STAT_HIT, batch->packet_count);
2057 dp_netdev_input(struct dp_netdev *dp, struct dpif_packet **packets, int cnt,
2058 struct pkt_metadata *md)
2060 struct packet_batch batches[NETDEV_MAX_RX_BATCH];
2061 struct netdev_flow_key keys[NETDEV_MAX_RX_BATCH];
2062 const struct miniflow *mfs[NETDEV_MAX_RX_BATCH]; /* NULL at bad packets. */
2063 struct cls_rule *rules[NETDEV_MAX_RX_BATCH];
2064 size_t n_batches, i;
2066 for (i = 0; i < cnt; i++) {
2067 if (OVS_UNLIKELY(ofpbuf_size(&packets[i]->ofpbuf) < ETH_HEADER_LEN)) {
2068 dpif_packet_delete(packets[i]);
2073 miniflow_initialize(&keys[i].flow, keys[i].buf);
2074 miniflow_extract(&packets[i]->ofpbuf, md, &keys[i].flow);
2075 mfs[i] = &keys[i].flow;
2078 classifier_lookup_miniflow_batch(&dp->cls, mfs, rules, cnt);
2081 for (i = 0; i < cnt; i++) {
2082 struct dp_netdev_flow *flow;
2083 struct packet_batch *batch;
2086 if (OVS_UNLIKELY(!mfs[i])) {
2090 if (OVS_UNLIKELY(!rules[i])) {
2091 dp_netdev_count_packet(dp, DP_STAT_MISS, 1);
2092 if (OVS_LIKELY(dp->handler_queues)) {
2093 uint32_t hash = miniflow_hash_5tuple(mfs[i], 0);
2094 struct ofpbuf *buf = &packets[i]->ofpbuf;
2096 dp_netdev_output_userspace(dp, &buf, 1, hash % dp->n_handlers,
2097 DPIF_UC_MISS, mfs[i], NULL);
2099 /* No upcall queue. Freeing the packet */
2100 dpif_packet_delete(packets[i]);
2105 /* XXX: This O(n^2) algortihm makes sense if we're operating under the
2106 * assumption that the number of distinct flows (and therefore the
2107 * number of distinct batches) is quite small. If this turns out not
2108 * to be the case, it may make sense to pre sort based on the
2109 * netdev_flow pointer. That done we can get the appropriate batching
2110 * in O(n * log(n)) instead. */
2112 flow = dp_netdev_flow_cast(rules[i]);
2113 for (j = 0; j < n_batches; j++) {
2114 if (batches[j].flow == flow) {
2115 batch = &batches[j];
2121 batch = &batches[n_batches++];
2122 packet_batch_init(batch, flow, md);
2124 packet_batch_update(batch, packets[i], mfs[i]);
2127 for (i = 0; i < n_batches; i++) {
2128 packet_batch_execute(&batches[i], dp);
2133 dp_netdev_port_input(struct dp_netdev *dp, struct dpif_packet **packets,
2134 int cnt, odp_port_t port_no)
2136 uint32_t *recirc_depth = recirc_depth_get();
2137 struct pkt_metadata md = PKT_METADATA_INITIALIZER(port_no);
2140 dp_netdev_input(dp, packets, cnt, &md);
2144 dp_netdev_queue_userspace_packet(struct dp_netdev_queue *q,
2145 struct ofpbuf *packet, int type,
2146 const struct miniflow *key,
2147 const struct nlattr *userdata)
2148 OVS_REQUIRES(q->mutex)
2150 if (q->head - q->tail < MAX_QUEUE_LEN) {
2151 struct dp_netdev_upcall *u = &q->upcalls[q->head++ & QUEUE_MASK];
2152 struct dpif_upcall *upcall = &u->upcall;
2153 struct ofpbuf *buf = &u->buf;
2157 upcall->type = type;
2159 /* Allocate buffer big enough for everything. */
2160 buf_size = ODPUTIL_FLOW_KEY_BYTES;
2162 buf_size += NLA_ALIGN(userdata->nla_len);
2164 ofpbuf_init(buf, buf_size);
2167 miniflow_expand(key, &flow);
2168 odp_flow_key_from_flow(buf, &flow, NULL, flow.in_port.odp_port, true);
2169 upcall->key = ofpbuf_data(buf);
2170 upcall->key_len = ofpbuf_size(buf);
2174 upcall->userdata = ofpbuf_put(buf, userdata,
2175 NLA_ALIGN(userdata->nla_len));
2178 upcall->packet = *packet;
2184 ofpbuf_delete(packet);
2191 dp_netdev_output_userspace(struct dp_netdev *dp, struct ofpbuf **packets,
2192 int cnt, int queue_no, int type,
2193 const struct miniflow *key,
2194 const struct nlattr *userdata)
2196 struct dp_netdev_queue *q;
2200 fat_rwlock_rdlock(&dp->queue_rwlock);
2201 q = &dp->handler_queues[queue_no];
2202 ovs_mutex_lock(&q->mutex);
2203 for (i = 0; i < cnt; i++) {
2204 struct ofpbuf *packet = packets[i];
2206 error = dp_netdev_queue_userspace_packet(q, packet, type, key,
2208 if (error == ENOBUFS) {
2209 dp_netdev_count_packet(dp, DP_STAT_LOST, 1);
2212 ovs_mutex_unlock(&q->mutex);
2213 fat_rwlock_unlock(&dp->queue_rwlock);
2218 struct dp_netdev_execute_aux {
2219 struct dp_netdev *dp;
2223 dp_execute_cb(void *aux_, struct dpif_packet **packets, int cnt,
2224 struct pkt_metadata *md,
2225 const struct nlattr *a, bool may_steal)
2226 OVS_NO_THREAD_SAFETY_ANALYSIS
2228 struct dp_netdev_execute_aux *aux = aux_;
2229 int type = nl_attr_type(a);
2230 struct dp_netdev_port *p;
2231 uint32_t *depth = recirc_depth_get();
2234 switch ((enum ovs_action_attr)type) {
2235 case OVS_ACTION_ATTR_OUTPUT:
2236 p = dp_netdev_lookup_port(aux->dp, u32_to_odp(nl_attr_get_u32(a)));
2237 if (OVS_LIKELY(p)) {
2238 netdev_send(p->netdev, packets, cnt, may_steal);
2239 } else if (may_steal) {
2240 for (i = 0; i < cnt; i++) {
2241 dpif_packet_delete(packets[i]);
2246 case OVS_ACTION_ATTR_USERSPACE: {
2247 const struct nlattr *userdata;
2248 struct netdev_flow_key key;
2250 userdata = nl_attr_find_nested(a, OVS_USERSPACE_ATTR_USERDATA);
2252 miniflow_initialize(&key.flow, key.buf);
2254 for (i = 0; i < cnt; i++) {
2255 struct ofpbuf *packet, *userspace_packet;
2257 packet = &packets[i]->ofpbuf;
2259 miniflow_extract(packet, md, &key.flow);
2261 userspace_packet = may_steal ? packet : ofpbuf_clone(packet);
2263 dp_netdev_output_userspace(aux->dp, &userspace_packet, 1,
2264 miniflow_hash_5tuple(&key.flow, 0)
2265 % aux->dp->n_handlers,
2266 DPIF_UC_ACTION, &key.flow,
2272 case OVS_ACTION_ATTR_HASH: {
2273 const struct ovs_action_hash *hash_act;
2274 struct netdev_flow_key key;
2277 hash_act = nl_attr_get(a);
2279 miniflow_initialize(&key.flow, key.buf);
2281 for (i = 0; i < cnt; i++) {
2283 /* TODO: this is slow. Use RSS hash in the future */
2284 miniflow_extract(&packets[i]->ofpbuf, md, &key.flow);
2286 if (hash_act->hash_alg == OVS_HASH_ALG_L4) {
2287 /* Hash need not be symmetric, nor does it need to include
2289 hash = miniflow_hash_5tuple(&key.flow, hash_act->hash_basis);
2291 VLOG_WARN("Unknown hash algorithm specified "
2292 "for the hash action.");
2297 hash = 1; /* 0 is not valid */
2303 packets[i]->dp_hash = hash;
2308 case OVS_ACTION_ATTR_RECIRC:
2309 if (*depth < MAX_RECIRC_DEPTH) {
2312 for (i = 0; i < cnt; i++) {
2313 struct dpif_packet *recirc_pkt;
2314 struct pkt_metadata recirc_md = *md;
2316 recirc_pkt = (may_steal) ? packets[i]
2317 : dpif_packet_clone(packets[i]);
2319 recirc_md.recirc_id = nl_attr_get_u32(a);
2321 /* Hash is private to each packet */
2322 recirc_md.dp_hash = packets[i]->dp_hash;
2324 dp_netdev_input(aux->dp, &recirc_pkt, 1, &recirc_md);
2330 VLOG_WARN("Packet dropped. Max recirculation depth exceeded.");
2332 for (i = 0; i < cnt; i++) {
2333 dpif_packet_delete(packets[i]);
2339 case OVS_ACTION_ATTR_PUSH_VLAN:
2340 case OVS_ACTION_ATTR_POP_VLAN:
2341 case OVS_ACTION_ATTR_PUSH_MPLS:
2342 case OVS_ACTION_ATTR_POP_MPLS:
2343 case OVS_ACTION_ATTR_SET:
2344 case OVS_ACTION_ATTR_SAMPLE:
2345 case OVS_ACTION_ATTR_UNSPEC:
2346 case __OVS_ACTION_ATTR_MAX:
2352 dp_netdev_execute_actions(struct dp_netdev *dp,
2353 struct dpif_packet **packets, int cnt,
2354 bool may_steal, struct pkt_metadata *md,
2355 const struct nlattr *actions, size_t actions_len)
2357 struct dp_netdev_execute_aux aux = {dp};
2359 odp_execute_actions(&aux, packets, cnt, may_steal, md, actions,
2360 actions_len, dp_execute_cb);
2363 const struct dpif_class dpif_netdev_class = {
2365 dpif_netdev_enumerate,
2366 dpif_netdev_port_open_type,
2369 dpif_netdev_destroy,
2372 dpif_netdev_get_stats,
2373 dpif_netdev_port_add,
2374 dpif_netdev_port_del,
2375 dpif_netdev_port_query_by_number,
2376 dpif_netdev_port_query_by_name,
2377 NULL, /* port_get_pid */
2378 dpif_netdev_port_dump_start,
2379 dpif_netdev_port_dump_next,
2380 dpif_netdev_port_dump_done,
2381 dpif_netdev_port_poll,
2382 dpif_netdev_port_poll_wait,
2383 dpif_netdev_flow_get,
2384 dpif_netdev_flow_put,
2385 dpif_netdev_flow_del,
2386 dpif_netdev_flow_flush,
2387 dpif_netdev_flow_dump_create,
2388 dpif_netdev_flow_dump_destroy,
2389 dpif_netdev_flow_dump_thread_create,
2390 dpif_netdev_flow_dump_thread_destroy,
2391 dpif_netdev_flow_dump_next,
2392 dpif_netdev_execute,
2394 dpif_netdev_recv_set,
2395 dpif_netdev_handlers_set,
2396 dpif_netdev_queue_to_priority,
2398 dpif_netdev_recv_wait,
2399 dpif_netdev_recv_purge,
2403 dpif_dummy_change_port_number(struct unixctl_conn *conn, int argc OVS_UNUSED,
2404 const char *argv[], void *aux OVS_UNUSED)
2406 struct dp_netdev_port *old_port;
2407 struct dp_netdev_port *new_port;
2408 struct dp_netdev *dp;
2411 ovs_mutex_lock(&dp_netdev_mutex);
2412 dp = shash_find_data(&dp_netdevs, argv[1]);
2413 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
2414 ovs_mutex_unlock(&dp_netdev_mutex);
2415 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
2418 ovs_refcount_ref(&dp->ref_cnt);
2419 ovs_mutex_unlock(&dp_netdev_mutex);
2421 ovs_mutex_lock(&dp->port_mutex);
2422 if (get_port_by_name(dp, argv[2], &old_port)) {
2423 unixctl_command_reply_error(conn, "unknown port");
2427 port_no = u32_to_odp(atoi(argv[3]));
2428 if (!port_no || port_no == ODPP_NONE) {
2429 unixctl_command_reply_error(conn, "bad port number");
2432 if (dp_netdev_lookup_port(dp, port_no)) {
2433 unixctl_command_reply_error(conn, "port number already in use");
2437 /* Remove old port. */
2438 cmap_remove(&dp->ports, &old_port->node, hash_port_no(old_port->port_no));
2439 ovsrcu_postpone(free, old_port);
2441 /* Insert new port (cmap semantics mean we cannot re-insert 'old_port'). */
2442 new_port = xmemdup(old_port, sizeof *old_port);
2443 new_port->port_no = port_no;
2444 cmap_insert(&dp->ports, &new_port->node, hash_port_no(port_no));
2446 seq_change(dp->port_seq);
2447 unixctl_command_reply(conn, NULL);
2450 ovs_mutex_unlock(&dp->port_mutex);
2451 dp_netdev_unref(dp);
2455 dpif_dummy_delete_port(struct unixctl_conn *conn, int argc OVS_UNUSED,
2456 const char *argv[], void *aux OVS_UNUSED)
2458 struct dp_netdev_port *port;
2459 struct dp_netdev *dp;
2461 ovs_mutex_lock(&dp_netdev_mutex);
2462 dp = shash_find_data(&dp_netdevs, argv[1]);
2463 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
2464 ovs_mutex_unlock(&dp_netdev_mutex);
2465 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
2468 ovs_refcount_ref(&dp->ref_cnt);
2469 ovs_mutex_unlock(&dp_netdev_mutex);
2471 ovs_mutex_lock(&dp->port_mutex);
2472 if (get_port_by_name(dp, argv[2], &port)) {
2473 unixctl_command_reply_error(conn, "unknown port");
2474 } else if (port->port_no == ODPP_LOCAL) {
2475 unixctl_command_reply_error(conn, "can't delete local port");
2477 do_del_port(dp, port);
2478 unixctl_command_reply(conn, NULL);
2480 ovs_mutex_unlock(&dp->port_mutex);
2482 dp_netdev_unref(dp);
2486 dpif_dummy_register__(const char *type)
2488 struct dpif_class *class;
2490 class = xmalloc(sizeof *class);
2491 *class = dpif_netdev_class;
2492 class->type = xstrdup(type);
2493 dp_register_provider(class);
2497 dpif_dummy_register(bool override)
2504 dp_enumerate_types(&types);
2505 SSET_FOR_EACH (type, &types) {
2506 if (!dp_unregister_provider(type)) {
2507 dpif_dummy_register__(type);
2510 sset_destroy(&types);
2513 dpif_dummy_register__("dummy");
2515 unixctl_command_register("dpif-dummy/change-port-number",
2516 "DP PORT NEW-NUMBER",
2517 3, 3, dpif_dummy_change_port_number, NULL);
2518 unixctl_command_register("dpif-dummy/delete-port", "DP PORT",
2519 2, 2, dpif_dummy_delete_port, NULL);