2 * Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
24 #include <netinet/in.h>
25 #include <sys/socket.h>
30 #include <sys/ioctl.h>
34 #include "classifier.h"
37 #include "dpif-provider.h"
39 #include "dynamic-string.h"
44 #include "meta-flow.h"
46 #include "netdev-vport.h"
48 #include "odp-execute.h"
50 #include "ofp-print.h"
53 #include "poll-loop.h"
63 VLOG_DEFINE_THIS_MODULE(dpif_netdev);
65 /* By default, choose a priority in the middle. */
66 #define NETDEV_RULE_PRIORITY 0x8000
68 /* Configuration parameters. */
69 enum { MAX_FLOWS = 65536 }; /* Maximum number of flows in flow table. */
71 /* Enough headroom to add a vlan tag, plus an extra 2 bytes to allow IP
72 * headers to be aligned on a 4-byte boundary. */
73 enum { DP_NETDEV_HEADROOM = 2 + VLAN_HEADER_LEN };
76 enum { N_QUEUES = 2 }; /* Number of queues for dpif_recv(). */
77 enum { MAX_QUEUE_LEN = 128 }; /* Maximum number of packets per queue. */
78 enum { QUEUE_MASK = MAX_QUEUE_LEN - 1 };
79 BUILD_ASSERT_DECL(IS_POW2(MAX_QUEUE_LEN));
81 /* Protects against changes to 'dp_netdevs'. */
82 static struct ovs_mutex dp_netdev_mutex = OVS_MUTEX_INITIALIZER;
84 /* Contains all 'struct dp_netdev's. */
85 static struct shash dp_netdevs OVS_GUARDED_BY(dp_netdev_mutex)
86 = SHASH_INITIALIZER(&dp_netdevs);
88 struct dp_netdev_upcall {
89 struct dpif_upcall upcall; /* Queued upcall information. */
90 struct ofpbuf buf; /* ofpbuf instance for upcall.packet. */
93 /* A queue passing packets from a struct dp_netdev to its clients.
99 * Any access at all requires the owning 'dp_netdev''s queue_mutex. */
100 struct dp_netdev_queue {
101 struct dp_netdev_upcall upcalls[MAX_QUEUE_LEN] OVS_GUARDED;
102 unsigned int head OVS_GUARDED;
103 unsigned int tail OVS_GUARDED;
106 /* Datapath based on the network device interface from netdev.h.
112 * Some members, marked 'const', are immutable. Accessing other members
113 * requires synchronization, as noted in more detail below.
115 * Acquisition order is, from outermost to innermost:
117 * dp_netdev_mutex (global)
124 const struct dpif_class *const class;
125 const char *const name;
126 struct ovs_refcount ref_cnt;
127 atomic_flag destroyed;
131 * Readers of 'cls' and 'flow_table' must take a 'cls->rwlock' read lock.
133 * Writers of 'cls' and 'flow_table' must take the 'flow_mutex' and then
134 * the 'cls->rwlock' write lock. (The outer 'flow_mutex' allows writers to
135 * atomically perform multiple operations on 'cls' and 'flow_table'.)
137 struct ovs_mutex flow_mutex;
138 struct classifier cls; /* Classifier. Protected by cls.rwlock. */
139 struct hmap flow_table OVS_GUARDED; /* Flow table. */
143 * Everything in 'queues' is protected by 'queue_mutex'. */
144 struct ovs_mutex queue_mutex;
145 struct dp_netdev_queue queues[N_QUEUES];
146 struct seq *queue_seq; /* Incremented whenever a packet is queued. */
150 * ovsthread_counter is internally synchronized. */
151 struct ovsthread_counter *n_hit; /* Number of flow table matches. */
152 struct ovsthread_counter *n_missed; /* Number of flow table misses. */
153 struct ovsthread_counter *n_lost; /* Number of misses not passed up. */
157 * Any lookup into 'ports' or any access to the dp_netdev_ports found
158 * through 'ports' requires taking 'port_rwlock'. */
159 struct ovs_rwlock port_rwlock;
160 struct hmap ports OVS_GUARDED;
161 struct seq *port_seq; /* Incremented whenever a port changes. */
163 /* Forwarding threads. */
164 struct latch exit_latch;
165 struct dp_forwarder *forwarders;
169 static struct dp_netdev_port *dp_netdev_lookup_port(const struct dp_netdev *dp,
171 OVS_REQ_RDLOCK(dp->port_rwlock);
173 /* A port in a netdev-based datapath. */
174 struct dp_netdev_port {
175 struct hmap_node node; /* Node in dp_netdev's 'ports'. */
177 struct netdev *netdev;
178 struct netdev_saved_flags *sf;
179 struct netdev_rx *rx;
180 char *type; /* Port type as requested by user. */
183 /* A flow in dp_netdev's 'flow_table'.
189 * Except near the beginning or ending of its lifespan, rule 'rule' belongs to
190 * its dp_netdev's classifier. The text below calls this classifier 'cls'.
195 * The thread safety rules described here for "struct dp_netdev_flow" are
196 * motivated by two goals:
198 * - Prevent threads that read members of "struct dp_netdev_flow" from
199 * reading bad data due to changes by some thread concurrently modifying
202 * - Prevent two threads making changes to members of a given "struct
203 * dp_netdev_flow" from interfering with each other.
209 * A flow 'flow' may be accessed without a risk of being freed by code that
210 * holds a read-lock or write-lock on 'cls->rwlock' or that owns a reference to
211 * 'flow->ref_cnt' (or both). Code that needs to hold onto a flow for a while
212 * should take 'cls->rwlock', find the flow it needs, increment 'flow->ref_cnt'
213 * with dpif_netdev_flow_ref(), and drop 'cls->rwlock'.
215 * 'flow->ref_cnt' protects 'flow' from being freed. It doesn't protect the
216 * flow from being deleted from 'cls' (that's 'cls->rwlock') and it doesn't
217 * protect members of 'flow' from modification (that's 'flow->mutex').
219 * 'flow->mutex' protects the members of 'flow' from modification. It doesn't
220 * protect the flow from being deleted from 'cls' (that's 'cls->rwlock') and it
221 * doesn't prevent the flow from being freed (that's 'flow->ref_cnt').
223 * Some members, marked 'const', are immutable. Accessing other members
224 * requires synchronization, as noted in more detail below.
226 struct dp_netdev_flow {
227 /* Packet classification. */
228 const struct cls_rule cr; /* In owning dp_netdev's 'cls'. */
230 /* Hash table index by unmasked flow. */
231 const struct hmap_node node; /* In owning dp_netdev's 'flow_table'. */
232 const struct flow flow; /* The flow that created this entry. */
234 /* Number of references.
235 * The classifier owns one reference.
236 * Any thread trying to keep a rule from being freed should hold its own
238 struct ovs_refcount ref_cnt;
240 /* Protects members marked OVS_GUARDED.
242 * Acquire after datapath's flow_mutex. */
243 struct ovs_mutex mutex OVS_ACQ_AFTER(dp_netdev_mutex);
247 * Reading or writing these members requires 'mutex'. */
248 long long int used OVS_GUARDED; /* Last used time, in monotonic msecs. */
249 long long int packet_count OVS_GUARDED; /* Number of packets matched. */
250 long long int byte_count OVS_GUARDED; /* Number of bytes matched. */
251 uint16_t tcp_flags OVS_GUARDED; /* Bitwise-OR of seen tcp_flags values. */
255 * Reading 'actions' requires 'mutex'.
256 * Writing 'actions' requires 'mutex' and (to allow for transactions) the
257 * datapath's flow_mutex. */
258 struct dp_netdev_actions *actions OVS_GUARDED;
261 static struct dp_netdev_flow *dp_netdev_flow_ref(
262 const struct dp_netdev_flow *);
263 static void dp_netdev_flow_unref(struct dp_netdev_flow *);
265 /* A set of datapath actions within a "struct dp_netdev_flow".
271 * A struct dp_netdev_actions 'actions' may be accessed without a risk of being
272 * freed by code that holds a read-lock or write-lock on 'flow->mutex' (where
273 * 'flow' is the dp_netdev_flow for which 'flow->actions == actions') or that
274 * owns a reference to 'actions->ref_cnt' (or both). */
275 struct dp_netdev_actions {
276 struct ovs_refcount ref_cnt;
278 /* These members are immutable: they do not change during the struct's
280 struct nlattr *actions; /* Sequence of OVS_ACTION_ATTR_* attributes. */
281 unsigned int size; /* Size of 'actions', in bytes. */
284 struct dp_netdev_actions *dp_netdev_actions_create(const struct nlattr *,
286 struct dp_netdev_actions *dp_netdev_actions_ref(
287 const struct dp_netdev_actions *);
288 void dp_netdev_actions_unref(struct dp_netdev_actions *);
290 /* A thread that receives packets from some ports, looks them up in the flow
291 * table, and executes the actions it finds. */
292 struct dp_forwarder {
293 struct dp_netdev *dp;
296 uint32_t min_hash, max_hash;
299 /* Interface to netdev-based datapath. */
302 struct dp_netdev *dp;
303 uint64_t last_port_seq;
306 static int get_port_by_number(struct dp_netdev *dp, odp_port_t port_no,
307 struct dp_netdev_port **portp)
308 OVS_REQ_RDLOCK(dp->port_rwlock);
309 static int get_port_by_name(struct dp_netdev *dp, const char *devname,
310 struct dp_netdev_port **portp)
311 OVS_REQ_RDLOCK(dp->port_rwlock);
312 static void dp_netdev_free(struct dp_netdev *)
313 OVS_REQUIRES(dp_netdev_mutex);
314 static void dp_netdev_flow_flush(struct dp_netdev *);
315 static int do_add_port(struct dp_netdev *dp, const char *devname,
316 const char *type, odp_port_t port_no)
317 OVS_REQ_WRLOCK(dp->port_rwlock);
318 static int do_del_port(struct dp_netdev *dp, odp_port_t port_no)
319 OVS_REQ_WRLOCK(dp->port_rwlock);
320 static int dpif_netdev_open(const struct dpif_class *, const char *name,
321 bool create, struct dpif **);
322 static int dp_netdev_output_userspace(struct dp_netdev *dp, struct ofpbuf *,
323 int queue_no, const struct flow *,
324 const struct nlattr *userdata)
325 OVS_EXCLUDED(dp->queue_mutex);
326 static void dp_netdev_execute_actions(struct dp_netdev *dp,
327 const struct flow *, struct ofpbuf *,
328 struct pkt_metadata *,
329 const struct nlattr *actions,
331 OVS_REQ_RDLOCK(dp->port_rwlock);
332 static void dp_netdev_port_input(struct dp_netdev *dp, struct ofpbuf *packet,
333 struct pkt_metadata *)
334 OVS_REQ_RDLOCK(dp->port_rwlock);
335 static void dp_netdev_set_threads(struct dp_netdev *, int n);
337 static struct dpif_netdev *
338 dpif_netdev_cast(const struct dpif *dpif)
340 ovs_assert(dpif->dpif_class->open == dpif_netdev_open);
341 return CONTAINER_OF(dpif, struct dpif_netdev, dpif);
344 static struct dp_netdev *
345 get_dp_netdev(const struct dpif *dpif)
347 return dpif_netdev_cast(dpif)->dp;
351 dpif_netdev_enumerate(struct sset *all_dps)
353 struct shash_node *node;
355 ovs_mutex_lock(&dp_netdev_mutex);
356 SHASH_FOR_EACH(node, &dp_netdevs) {
357 sset_add(all_dps, node->name);
359 ovs_mutex_unlock(&dp_netdev_mutex);
365 dpif_netdev_class_is_dummy(const struct dpif_class *class)
367 return class != &dpif_netdev_class;
371 dpif_netdev_port_open_type(const struct dpif_class *class, const char *type)
373 return strcmp(type, "internal") ? type
374 : dpif_netdev_class_is_dummy(class) ? "dummy"
379 create_dpif_netdev(struct dp_netdev *dp)
381 uint16_t netflow_id = hash_string(dp->name, 0);
382 struct dpif_netdev *dpif;
384 ovs_refcount_ref(&dp->ref_cnt);
386 dpif = xmalloc(sizeof *dpif);
387 dpif_init(&dpif->dpif, dp->class, dp->name, netflow_id >> 8, netflow_id);
389 dpif->last_port_seq = seq_read(dp->port_seq);
394 /* Choose an unused, non-zero port number and return it on success.
395 * Return ODPP_NONE on failure. */
397 choose_port(struct dp_netdev *dp, const char *name)
398 OVS_REQ_RDLOCK(dp->port_rwlock)
402 if (dp->class != &dpif_netdev_class) {
406 /* If the port name begins with "br", start the number search at
407 * 100 to make writing tests easier. */
408 if (!strncmp(name, "br", 2)) {
412 /* If the port name contains a number, try to assign that port number.
413 * This can make writing unit tests easier because port numbers are
415 for (p = name; *p != '\0'; p++) {
416 if (isdigit((unsigned char) *p)) {
417 port_no = start_no + strtol(p, NULL, 10);
418 if (port_no > 0 && port_no != odp_to_u32(ODPP_NONE)
419 && !dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
420 return u32_to_odp(port_no);
427 for (port_no = 1; port_no <= UINT16_MAX; port_no++) {
428 if (!dp_netdev_lookup_port(dp, u32_to_odp(port_no))) {
429 return u32_to_odp(port_no);
437 create_dp_netdev(const char *name, const struct dpif_class *class,
438 struct dp_netdev **dpp)
439 OVS_REQUIRES(dp_netdev_mutex)
441 struct dp_netdev *dp;
445 dp = xzalloc(sizeof *dp);
446 shash_add(&dp_netdevs, name, dp);
448 *CONST_CAST(const struct dpif_class **, &dp->class) = class;
449 *CONST_CAST(const char **, &dp->name) = xstrdup(name);
450 ovs_refcount_init(&dp->ref_cnt);
451 atomic_flag_clear(&dp->destroyed);
453 ovs_mutex_init(&dp->flow_mutex);
454 classifier_init(&dp->cls, NULL);
455 hmap_init(&dp->flow_table);
457 ovs_mutex_init(&dp->queue_mutex);
458 ovs_mutex_lock(&dp->queue_mutex);
459 for (i = 0; i < N_QUEUES; i++) {
460 dp->queues[i].head = dp->queues[i].tail = 0;
462 ovs_mutex_unlock(&dp->queue_mutex);
463 dp->queue_seq = seq_create();
465 dp->n_hit = ovsthread_counter_create();
466 dp->n_missed = ovsthread_counter_create();
467 dp->n_lost = ovsthread_counter_create();
469 ovs_rwlock_init(&dp->port_rwlock);
470 hmap_init(&dp->ports);
471 dp->port_seq = seq_create();
472 latch_init(&dp->exit_latch);
474 ovs_rwlock_wrlock(&dp->port_rwlock);
475 error = do_add_port(dp, name, "internal", ODPP_LOCAL);
476 ovs_rwlock_unlock(&dp->port_rwlock);
481 dp_netdev_set_threads(dp, 2);
488 dpif_netdev_open(const struct dpif_class *class, const char *name,
489 bool create, struct dpif **dpifp)
491 struct dp_netdev *dp;
494 ovs_mutex_lock(&dp_netdev_mutex);
495 dp = shash_find_data(&dp_netdevs, name);
497 error = create ? create_dp_netdev(name, class, &dp) : ENODEV;
499 error = (dp->class != class ? EINVAL
504 *dpifp = create_dpif_netdev(dp);
506 ovs_mutex_unlock(&dp_netdev_mutex);
512 dp_netdev_purge_queues(struct dp_netdev *dp)
516 ovs_mutex_lock(&dp->queue_mutex);
517 for (i = 0; i < N_QUEUES; i++) {
518 struct dp_netdev_queue *q = &dp->queues[i];
520 while (q->tail != q->head) {
521 struct dp_netdev_upcall *u = &q->upcalls[q->tail++ & QUEUE_MASK];
522 ofpbuf_uninit(&u->upcall.packet);
523 ofpbuf_uninit(&u->buf);
526 ovs_mutex_unlock(&dp->queue_mutex);
529 /* Requires dp_netdev_mutex so that we can't get a new reference to 'dp'
530 * through the 'dp_netdevs' shash while freeing 'dp'. */
532 dp_netdev_free(struct dp_netdev *dp)
533 OVS_REQUIRES(dp_netdev_mutex)
535 struct dp_netdev_port *port, *next;
537 shash_find_and_delete(&dp_netdevs, dp->name);
539 dp_netdev_set_threads(dp, 0);
540 free(dp->forwarders);
542 dp_netdev_flow_flush(dp);
543 ovs_rwlock_wrlock(&dp->port_rwlock);
544 HMAP_FOR_EACH_SAFE (port, next, node, &dp->ports) {
545 do_del_port(dp, port->port_no);
547 ovs_rwlock_unlock(&dp->port_rwlock);
548 ovsthread_counter_destroy(dp->n_hit);
549 ovsthread_counter_destroy(dp->n_missed);
550 ovsthread_counter_destroy(dp->n_lost);
552 dp_netdev_purge_queues(dp);
553 seq_destroy(dp->queue_seq);
554 ovs_mutex_destroy(&dp->queue_mutex);
556 classifier_destroy(&dp->cls);
557 hmap_destroy(&dp->flow_table);
558 ovs_mutex_destroy(&dp->flow_mutex);
559 seq_destroy(dp->port_seq);
560 hmap_destroy(&dp->ports);
561 latch_destroy(&dp->exit_latch);
562 free(CONST_CAST(char *, dp->name));
567 dp_netdev_unref(struct dp_netdev *dp)
570 /* Take dp_netdev_mutex so that, if dp->ref_cnt falls to zero, we can't
571 * get a new reference to 'dp' through the 'dp_netdevs' shash. */
572 ovs_mutex_lock(&dp_netdev_mutex);
573 if (ovs_refcount_unref(&dp->ref_cnt) == 1) {
576 ovs_mutex_unlock(&dp_netdev_mutex);
581 dpif_netdev_close(struct dpif *dpif)
583 struct dp_netdev *dp = get_dp_netdev(dpif);
590 dpif_netdev_destroy(struct dpif *dpif)
592 struct dp_netdev *dp = get_dp_netdev(dpif);
594 if (!atomic_flag_test_and_set(&dp->destroyed)) {
595 if (ovs_refcount_unref(&dp->ref_cnt) == 1) {
596 /* Can't happen: 'dpif' still owns a reference to 'dp'. */
605 dpif_netdev_get_stats(const struct dpif *dpif, struct dpif_dp_stats *stats)
607 struct dp_netdev *dp = get_dp_netdev(dpif);
609 fat_rwlock_rdlock(&dp->cls.rwlock);
610 stats->n_flows = hmap_count(&dp->flow_table);
611 fat_rwlock_unlock(&dp->cls.rwlock);
613 stats->n_hit = ovsthread_counter_read(dp->n_hit);
614 stats->n_missed = ovsthread_counter_read(dp->n_missed);
615 stats->n_lost = ovsthread_counter_read(dp->n_lost);
616 stats->n_masks = UINT32_MAX;
617 stats->n_mask_hit = UINT64_MAX;
623 do_add_port(struct dp_netdev *dp, const char *devname, const char *type,
625 OVS_REQ_WRLOCK(dp->port_rwlock)
627 struct netdev_saved_flags *sf;
628 struct dp_netdev_port *port;
629 struct netdev *netdev;
630 struct netdev_rx *rx;
631 enum netdev_flags flags;
632 const char *open_type;
635 /* XXX reject devices already in some dp_netdev. */
637 /* Open and validate network device. */
638 open_type = dpif_netdev_port_open_type(dp->class, type);
639 error = netdev_open(devname, open_type, &netdev);
643 /* XXX reject non-Ethernet devices */
645 netdev_get_flags(netdev, &flags);
646 if (flags & NETDEV_LOOPBACK) {
647 VLOG_ERR("%s: cannot add a loopback device", devname);
648 netdev_close(netdev);
652 error = netdev_rx_open(netdev, &rx);
654 && !(error == EOPNOTSUPP && dpif_netdev_class_is_dummy(dp->class))) {
655 VLOG_ERR("%s: cannot receive packets on this network device (%s)",
656 devname, ovs_strerror(errno));
657 netdev_close(netdev);
661 error = netdev_turn_flags_on(netdev, NETDEV_PROMISC, &sf);
664 netdev_close(netdev);
668 port = xmalloc(sizeof *port);
669 port->port_no = port_no;
670 port->netdev = netdev;
673 port->type = xstrdup(type);
675 hmap_insert(&dp->ports, &port->node, hash_int(odp_to_u32(port_no), 0));
676 seq_change(dp->port_seq);
682 dpif_netdev_port_add(struct dpif *dpif, struct netdev *netdev,
683 odp_port_t *port_nop)
685 struct dp_netdev *dp = get_dp_netdev(dpif);
686 char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
687 const char *dpif_port;
691 ovs_rwlock_wrlock(&dp->port_rwlock);
692 dpif_port = netdev_vport_get_dpif_port(netdev, namebuf, sizeof namebuf);
693 if (*port_nop != ODPP_NONE) {
695 error = dp_netdev_lookup_port(dp, *port_nop) ? EBUSY : 0;
697 port_no = choose_port(dp, dpif_port);
698 error = port_no == ODPP_NONE ? EFBIG : 0;
702 error = do_add_port(dp, dpif_port, netdev_get_type(netdev), port_no);
704 ovs_rwlock_unlock(&dp->port_rwlock);
710 dpif_netdev_port_del(struct dpif *dpif, odp_port_t port_no)
712 struct dp_netdev *dp = get_dp_netdev(dpif);
715 ovs_rwlock_wrlock(&dp->port_rwlock);
716 error = port_no == ODPP_LOCAL ? EINVAL : do_del_port(dp, port_no);
717 ovs_rwlock_unlock(&dp->port_rwlock);
723 is_valid_port_number(odp_port_t port_no)
725 return port_no != ODPP_NONE;
728 static struct dp_netdev_port *
729 dp_netdev_lookup_port(const struct dp_netdev *dp, odp_port_t port_no)
730 OVS_REQ_RDLOCK(dp->port_rwlock)
732 struct dp_netdev_port *port;
734 HMAP_FOR_EACH_IN_BUCKET (port, node, hash_int(odp_to_u32(port_no), 0),
736 if (port->port_no == port_no) {
744 get_port_by_number(struct dp_netdev *dp,
745 odp_port_t port_no, struct dp_netdev_port **portp)
746 OVS_REQ_RDLOCK(dp->port_rwlock)
748 if (!is_valid_port_number(port_no)) {
752 *portp = dp_netdev_lookup_port(dp, port_no);
753 return *portp ? 0 : ENOENT;
758 get_port_by_name(struct dp_netdev *dp,
759 const char *devname, struct dp_netdev_port **portp)
760 OVS_REQ_RDLOCK(dp->port_rwlock)
762 struct dp_netdev_port *port;
764 HMAP_FOR_EACH (port, node, &dp->ports) {
765 if (!strcmp(netdev_get_name(port->netdev), devname)) {
774 do_del_port(struct dp_netdev *dp, odp_port_t port_no)
775 OVS_REQ_WRLOCK(dp->port_rwlock)
777 struct dp_netdev_port *port;
780 error = get_port_by_number(dp, port_no, &port);
785 hmap_remove(&dp->ports, &port->node);
786 seq_change(dp->port_seq);
788 netdev_close(port->netdev);
789 netdev_restore_flags(port->sf);
790 netdev_rx_close(port->rx);
798 answer_port_query(const struct dp_netdev_port *port,
799 struct dpif_port *dpif_port)
801 dpif_port->name = xstrdup(netdev_get_name(port->netdev));
802 dpif_port->type = xstrdup(port->type);
803 dpif_port->port_no = port->port_no;
807 dpif_netdev_port_query_by_number(const struct dpif *dpif, odp_port_t port_no,
808 struct dpif_port *dpif_port)
810 struct dp_netdev *dp = get_dp_netdev(dpif);
811 struct dp_netdev_port *port;
814 ovs_rwlock_rdlock(&dp->port_rwlock);
815 error = get_port_by_number(dp, port_no, &port);
816 if (!error && dpif_port) {
817 answer_port_query(port, dpif_port);
819 ovs_rwlock_unlock(&dp->port_rwlock);
825 dpif_netdev_port_query_by_name(const struct dpif *dpif, const char *devname,
826 struct dpif_port *dpif_port)
828 struct dp_netdev *dp = get_dp_netdev(dpif);
829 struct dp_netdev_port *port;
832 ovs_rwlock_rdlock(&dp->port_rwlock);
833 error = get_port_by_name(dp, devname, &port);
834 if (!error && dpif_port) {
835 answer_port_query(port, dpif_port);
837 ovs_rwlock_unlock(&dp->port_rwlock);
843 dp_netdev_remove_flow(struct dp_netdev *dp, struct dp_netdev_flow *flow)
844 OVS_REQ_WRLOCK(dp->cls.rwlock)
845 OVS_REQUIRES(dp->flow_mutex)
847 struct cls_rule *cr = CONST_CAST(struct cls_rule *, &flow->cr);
848 struct hmap_node *node = CONST_CAST(struct hmap_node *, &flow->node);
850 classifier_remove(&dp->cls, cr);
851 hmap_remove(&dp->flow_table, node);
852 dp_netdev_flow_unref(flow);
855 static struct dp_netdev_flow *
856 dp_netdev_flow_ref(const struct dp_netdev_flow *flow_)
858 struct dp_netdev_flow *flow = CONST_CAST(struct dp_netdev_flow *, flow_);
860 ovs_refcount_ref(&flow->ref_cnt);
866 dp_netdev_flow_unref(struct dp_netdev_flow *flow)
868 if (flow && ovs_refcount_unref(&flow->ref_cnt) == 1) {
869 cls_rule_destroy(CONST_CAST(struct cls_rule *, &flow->cr));
870 ovs_mutex_lock(&flow->mutex);
871 dp_netdev_actions_unref(flow->actions);
872 ovs_mutex_unlock(&flow->mutex);
873 ovs_mutex_destroy(&flow->mutex);
879 dp_netdev_flow_flush(struct dp_netdev *dp)
881 struct dp_netdev_flow *netdev_flow, *next;
883 ovs_mutex_lock(&dp->flow_mutex);
884 fat_rwlock_wrlock(&dp->cls.rwlock);
885 HMAP_FOR_EACH_SAFE (netdev_flow, next, node, &dp->flow_table) {
886 dp_netdev_remove_flow(dp, netdev_flow);
888 fat_rwlock_unlock(&dp->cls.rwlock);
889 ovs_mutex_unlock(&dp->flow_mutex);
893 dpif_netdev_flow_flush(struct dpif *dpif)
895 struct dp_netdev *dp = get_dp_netdev(dpif);
897 dp_netdev_flow_flush(dp);
901 struct dp_netdev_port_state {
908 dpif_netdev_port_dump_start(const struct dpif *dpif OVS_UNUSED, void **statep)
910 *statep = xzalloc(sizeof(struct dp_netdev_port_state));
915 dpif_netdev_port_dump_next(const struct dpif *dpif, void *state_,
916 struct dpif_port *dpif_port)
918 struct dp_netdev_port_state *state = state_;
919 struct dp_netdev *dp = get_dp_netdev(dpif);
920 struct hmap_node *node;
923 ovs_rwlock_rdlock(&dp->port_rwlock);
924 node = hmap_at_position(&dp->ports, &state->bucket, &state->offset);
926 struct dp_netdev_port *port;
928 port = CONTAINER_OF(node, struct dp_netdev_port, node);
931 state->name = xstrdup(netdev_get_name(port->netdev));
932 dpif_port->name = state->name;
933 dpif_port->type = port->type;
934 dpif_port->port_no = port->port_no;
940 ovs_rwlock_unlock(&dp->port_rwlock);
946 dpif_netdev_port_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
948 struct dp_netdev_port_state *state = state_;
955 dpif_netdev_port_poll(const struct dpif *dpif_, char **devnamep OVS_UNUSED)
957 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
958 uint64_t new_port_seq;
961 new_port_seq = seq_read(dpif->dp->port_seq);
962 if (dpif->last_port_seq != new_port_seq) {
963 dpif->last_port_seq = new_port_seq;
973 dpif_netdev_port_poll_wait(const struct dpif *dpif_)
975 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
977 seq_wait(dpif->dp->port_seq, dpif->last_port_seq);
980 static struct dp_netdev_flow *
981 dp_netdev_flow_cast(const struct cls_rule *cr)
983 return cr ? CONTAINER_OF(cr, struct dp_netdev_flow, cr) : NULL;
986 static struct dp_netdev_flow *
987 dp_netdev_lookup_flow(const struct dp_netdev *dp, const struct flow *flow)
988 OVS_EXCLUDED(dp->cls.rwlock)
990 struct dp_netdev_flow *netdev_flow;
992 fat_rwlock_rdlock(&dp->cls.rwlock);
993 netdev_flow = dp_netdev_flow_cast(classifier_lookup(&dp->cls, flow, NULL));
994 dp_netdev_flow_ref(netdev_flow);
995 fat_rwlock_unlock(&dp->cls.rwlock);
1000 static struct dp_netdev_flow *
1001 dp_netdev_find_flow(const struct dp_netdev *dp, const struct flow *flow)
1002 OVS_REQ_RDLOCK(dp->cls.rwlock)
1004 struct dp_netdev_flow *netdev_flow;
1006 HMAP_FOR_EACH_WITH_HASH (netdev_flow, node, flow_hash(flow, 0),
1008 if (flow_equal(&netdev_flow->flow, flow)) {
1009 return dp_netdev_flow_ref(netdev_flow);
1017 get_dpif_flow_stats(struct dp_netdev_flow *netdev_flow,
1018 struct dpif_flow_stats *stats)
1019 OVS_REQ_RDLOCK(netdev_flow->mutex)
1021 stats->n_packets = netdev_flow->packet_count;
1022 stats->n_bytes = netdev_flow->byte_count;
1023 stats->used = netdev_flow->used;
1024 stats->tcp_flags = netdev_flow->tcp_flags;
1028 dpif_netdev_mask_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1029 const struct nlattr *mask_key,
1030 uint32_t mask_key_len, const struct flow *flow,
1034 enum odp_key_fitness fitness;
1036 fitness = odp_flow_key_to_mask(mask_key, mask_key_len, mask, flow);
1038 /* This should not happen: it indicates that
1039 * odp_flow_key_from_mask() and odp_flow_key_to_mask()
1040 * disagree on the acceptable form of a mask. Log the problem
1041 * as an error, with enough details to enable debugging. */
1042 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1044 if (!VLOG_DROP_ERR(&rl)) {
1048 odp_flow_format(key, key_len, mask_key, mask_key_len, NULL, &s,
1050 VLOG_ERR("internal error parsing flow mask %s (%s)",
1051 ds_cstr(&s), odp_key_fitness_to_string(fitness));
1057 /* Force unwildcard the in_port. */
1058 mask->in_port.odp_port = u32_to_odp(UINT32_MAX);
1060 enum mf_field_id id;
1061 /* No mask key, unwildcard everything except fields whose
1062 * prerequisities are not met. */
1063 memset(mask, 0x0, sizeof *mask);
1065 for (id = 0; id < MFF_N_IDS; ++id) {
1066 /* Skip registers and metadata. */
1067 if (!(id >= MFF_REG0 && id < MFF_REG0 + FLOW_N_REGS)
1068 && id != MFF_METADATA) {
1069 const struct mf_field *mf = mf_from_id(id);
1070 if (mf_are_prereqs_ok(mf, flow)) {
1071 mf_mask_field(mf, mask);
1081 dpif_netdev_flow_from_nlattrs(const struct nlattr *key, uint32_t key_len,
1086 if (odp_flow_key_to_flow(key, key_len, flow)) {
1087 /* This should not happen: it indicates that odp_flow_key_from_flow()
1088 * and odp_flow_key_to_flow() disagree on the acceptable form of a
1089 * flow. Log the problem as an error, with enough details to enable
1091 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1093 if (!VLOG_DROP_ERR(&rl)) {
1097 odp_flow_format(key, key_len, NULL, 0, NULL, &s, true);
1098 VLOG_ERR("internal error parsing flow key %s", ds_cstr(&s));
1105 in_port = flow->in_port.odp_port;
1106 if (!is_valid_port_number(in_port) && in_port != ODPP_NONE) {
1114 dpif_netdev_flow_get(const struct dpif *dpif,
1115 const struct nlattr *nl_key, size_t nl_key_len,
1116 struct ofpbuf **actionsp, struct dpif_flow_stats *stats)
1118 struct dp_netdev *dp = get_dp_netdev(dpif);
1119 struct dp_netdev_flow *netdev_flow;
1123 error = dpif_netdev_flow_from_nlattrs(nl_key, nl_key_len, &key);
1128 fat_rwlock_rdlock(&dp->cls.rwlock);
1129 netdev_flow = dp_netdev_find_flow(dp, &key);
1130 fat_rwlock_unlock(&dp->cls.rwlock);
1133 struct dp_netdev_actions *actions = NULL;
1135 ovs_mutex_lock(&netdev_flow->mutex);
1137 get_dpif_flow_stats(netdev_flow, stats);
1140 actions = dp_netdev_actions_ref(netdev_flow->actions);
1142 ovs_mutex_unlock(&netdev_flow->mutex);
1144 dp_netdev_flow_unref(netdev_flow);
1147 *actionsp = ofpbuf_clone_data(actions->actions, actions->size);
1148 dp_netdev_actions_unref(actions);
1158 dp_netdev_flow_add(struct dp_netdev *dp, const struct flow *flow,
1159 const struct flow_wildcards *wc,
1160 const struct nlattr *actions,
1162 OVS_REQUIRES(dp->flow_mutex)
1164 struct dp_netdev_flow *netdev_flow;
1167 netdev_flow = xzalloc(sizeof *netdev_flow);
1168 *CONST_CAST(struct flow *, &netdev_flow->flow) = *flow;
1169 ovs_refcount_init(&netdev_flow->ref_cnt);
1171 ovs_mutex_init(&netdev_flow->mutex);
1172 ovs_mutex_lock(&netdev_flow->mutex);
1174 netdev_flow->actions = dp_netdev_actions_create(actions, actions_len);
1176 match_init(&match, flow, wc);
1177 cls_rule_init(CONST_CAST(struct cls_rule *, &netdev_flow->cr),
1178 &match, NETDEV_RULE_PRIORITY);
1179 fat_rwlock_wrlock(&dp->cls.rwlock);
1180 classifier_insert(&dp->cls,
1181 CONST_CAST(struct cls_rule *, &netdev_flow->cr));
1182 hmap_insert(&dp->flow_table,
1183 CONST_CAST(struct hmap_node *, &netdev_flow->node),
1184 flow_hash(flow, 0));
1185 fat_rwlock_unlock(&dp->cls.rwlock);
1187 ovs_mutex_unlock(&netdev_flow->mutex);
1193 clear_stats(struct dp_netdev_flow *netdev_flow)
1194 OVS_REQUIRES(netdev_flow->mutex)
1196 netdev_flow->used = 0;
1197 netdev_flow->packet_count = 0;
1198 netdev_flow->byte_count = 0;
1199 netdev_flow->tcp_flags = 0;
1203 dpif_netdev_flow_put(struct dpif *dpif, const struct dpif_flow_put *put)
1205 struct dp_netdev *dp = get_dp_netdev(dpif);
1206 struct dp_netdev_flow *netdev_flow;
1208 struct flow_wildcards wc;
1211 error = dpif_netdev_flow_from_nlattrs(put->key, put->key_len, &flow);
1215 error = dpif_netdev_mask_from_nlattrs(put->key, put->key_len,
1216 put->mask, put->mask_len,
1222 ovs_mutex_lock(&dp->flow_mutex);
1223 netdev_flow = dp_netdev_lookup_flow(dp, &flow);
1225 if (put->flags & DPIF_FP_CREATE) {
1226 if (hmap_count(&dp->flow_table) < MAX_FLOWS) {
1228 memset(put->stats, 0, sizeof *put->stats);
1230 error = dp_netdev_flow_add(dp, &flow, &wc, put->actions,
1239 if (put->flags & DPIF_FP_MODIFY
1240 && flow_equal(&flow, &netdev_flow->flow)) {
1241 struct dp_netdev_actions *new_actions;
1242 struct dp_netdev_actions *old_actions;
1244 new_actions = dp_netdev_actions_create(put->actions,
1247 ovs_mutex_lock(&netdev_flow->mutex);
1248 old_actions = netdev_flow->actions;
1249 netdev_flow->actions = new_actions;
1251 get_dpif_flow_stats(netdev_flow, put->stats);
1253 if (put->flags & DPIF_FP_ZERO_STATS) {
1254 clear_stats(netdev_flow);
1256 ovs_mutex_unlock(&netdev_flow->mutex);
1258 dp_netdev_actions_unref(old_actions);
1259 } else if (put->flags & DPIF_FP_CREATE) {
1262 /* Overlapping flow. */
1265 dp_netdev_flow_unref(netdev_flow);
1267 ovs_mutex_unlock(&dp->flow_mutex);
1273 dpif_netdev_flow_del(struct dpif *dpif, const struct dpif_flow_del *del)
1275 struct dp_netdev *dp = get_dp_netdev(dpif);
1276 struct dp_netdev_flow *netdev_flow;
1280 error = dpif_netdev_flow_from_nlattrs(del->key, del->key_len, &key);
1285 ovs_mutex_lock(&dp->flow_mutex);
1286 fat_rwlock_wrlock(&dp->cls.rwlock);
1287 netdev_flow = dp_netdev_find_flow(dp, &key);
1290 ovs_mutex_lock(&netdev_flow->mutex);
1291 get_dpif_flow_stats(netdev_flow, del->stats);
1292 ovs_mutex_unlock(&netdev_flow->mutex);
1294 dp_netdev_remove_flow(dp, netdev_flow);
1295 dp_netdev_flow_unref(netdev_flow);
1299 fat_rwlock_unlock(&dp->cls.rwlock);
1300 ovs_mutex_unlock(&dp->flow_mutex);
1305 struct dp_netdev_flow_state {
1306 struct dp_netdev_actions *actions;
1307 struct odputil_keybuf keybuf;
1308 struct odputil_keybuf maskbuf;
1309 struct dpif_flow_stats stats;
1312 struct dp_netdev_flow_iter {
1316 struct ovs_mutex mutex;
1320 dpif_netdev_flow_dump_state_init(void **statep)
1322 struct dp_netdev_flow_state *state;
1324 *statep = state = xmalloc(sizeof *state);
1325 state->actions = NULL;
1329 dpif_netdev_flow_dump_state_uninit(void *state_)
1331 struct dp_netdev_flow_state *state = state_;
1333 dp_netdev_actions_unref(state->actions);
1338 dpif_netdev_flow_dump_start(const struct dpif *dpif OVS_UNUSED, void **iterp)
1340 struct dp_netdev_flow_iter *iter;
1342 *iterp = iter = xmalloc(sizeof *iter);
1346 ovs_mutex_init(&iter->mutex);
1351 dpif_netdev_flow_dump_next(const struct dpif *dpif, void *iter_, void *state_,
1352 const struct nlattr **key, size_t *key_len,
1353 const struct nlattr **mask, size_t *mask_len,
1354 const struct nlattr **actions, size_t *actions_len,
1355 const struct dpif_flow_stats **stats)
1357 struct dp_netdev_flow_iter *iter = iter_;
1358 struct dp_netdev_flow_state *state = state_;
1359 struct dp_netdev *dp = get_dp_netdev(dpif);
1360 struct dp_netdev_flow *netdev_flow;
1363 ovs_mutex_lock(&iter->mutex);
1364 error = iter->status;
1366 struct hmap_node *node;
1368 fat_rwlock_rdlock(&dp->cls.rwlock);
1369 node = hmap_at_position(&dp->flow_table, &iter->bucket, &iter->offset);
1371 netdev_flow = CONTAINER_OF(node, struct dp_netdev_flow, node);
1372 dp_netdev_flow_ref(netdev_flow);
1374 fat_rwlock_unlock(&dp->cls.rwlock);
1376 iter->status = error = EOF;
1379 ovs_mutex_unlock(&iter->mutex);
1387 ofpbuf_use_stack(&buf, &state->keybuf, sizeof state->keybuf);
1388 odp_flow_key_from_flow(&buf, &netdev_flow->flow,
1389 netdev_flow->flow.in_port.odp_port);
1392 *key_len = buf.size;
1397 struct flow_wildcards wc;
1399 ofpbuf_use_stack(&buf, &state->maskbuf, sizeof state->maskbuf);
1400 minimask_expand(&netdev_flow->cr.match.mask, &wc);
1401 odp_flow_key_from_mask(&buf, &wc.masks, &netdev_flow->flow,
1402 odp_to_u32(wc.masks.in_port.odp_port),
1406 *mask_len = buf.size;
1409 if (actions || stats) {
1410 dp_netdev_actions_unref(state->actions);
1411 state->actions = NULL;
1413 ovs_mutex_lock(&netdev_flow->mutex);
1415 state->actions = dp_netdev_actions_ref(netdev_flow->actions);
1416 *actions = state->actions->actions;
1417 *actions_len = state->actions->size;
1420 get_dpif_flow_stats(netdev_flow, &state->stats);
1421 *stats = &state->stats;
1423 ovs_mutex_unlock(&netdev_flow->mutex);
1426 dp_netdev_flow_unref(netdev_flow);
1432 dpif_netdev_flow_dump_done(const struct dpif *dpif OVS_UNUSED, void *iter_)
1434 struct dp_netdev_flow_iter *iter = iter_;
1436 ovs_mutex_destroy(&iter->mutex);
1442 dpif_netdev_execute(struct dpif *dpif, struct dpif_execute *execute)
1444 struct dp_netdev *dp = get_dp_netdev(dpif);
1445 struct pkt_metadata *md = &execute->md;
1448 if (execute->packet->size < ETH_HEADER_LEN ||
1449 execute->packet->size > UINT16_MAX) {
1453 /* Extract flow key. */
1454 flow_extract(execute->packet, md, &key);
1456 ovs_rwlock_rdlock(&dp->port_rwlock);
1457 dp_netdev_execute_actions(dp, &key, execute->packet, md, execute->actions,
1458 execute->actions_len);
1459 ovs_rwlock_unlock(&dp->port_rwlock);
1465 dpif_netdev_recv_set(struct dpif *dpif OVS_UNUSED, bool enable OVS_UNUSED)
1471 dpif_netdev_queue_to_priority(const struct dpif *dpif OVS_UNUSED,
1472 uint32_t queue_id, uint32_t *priority)
1474 *priority = queue_id;
1478 static struct dp_netdev_queue *
1479 find_nonempty_queue(struct dp_netdev *dp)
1480 OVS_REQUIRES(dp->queue_mutex)
1484 for (i = 0; i < N_QUEUES; i++) {
1485 struct dp_netdev_queue *q = &dp->queues[i];
1486 if (q->head != q->tail) {
1494 dpif_netdev_recv(struct dpif *dpif, struct dpif_upcall *upcall,
1497 struct dp_netdev *dp = get_dp_netdev(dpif);
1498 struct dp_netdev_queue *q;
1501 ovs_mutex_lock(&dp->queue_mutex);
1502 q = find_nonempty_queue(dp);
1504 struct dp_netdev_upcall *u = &q->upcalls[q->tail++ & QUEUE_MASK];
1506 *upcall = u->upcall;
1515 ovs_mutex_unlock(&dp->queue_mutex);
1521 dpif_netdev_recv_wait(struct dpif *dpif)
1523 struct dp_netdev *dp = get_dp_netdev(dpif);
1526 ovs_mutex_lock(&dp->queue_mutex);
1527 seq = seq_read(dp->queue_seq);
1528 if (find_nonempty_queue(dp)) {
1529 poll_immediate_wake();
1531 seq_wait(dp->queue_seq, seq);
1533 ovs_mutex_unlock(&dp->queue_mutex);
1537 dpif_netdev_recv_purge(struct dpif *dpif)
1539 struct dpif_netdev *dpif_netdev = dpif_netdev_cast(dpif);
1541 dp_netdev_purge_queues(dpif_netdev->dp);
1544 /* Creates and returns a new 'struct dp_netdev_actions', with a reference count
1545 * of 1, whose actions are a copy of from the 'ofpacts_len' bytes of
1547 struct dp_netdev_actions *
1548 dp_netdev_actions_create(const struct nlattr *actions, size_t size)
1550 struct dp_netdev_actions *netdev_actions;
1552 netdev_actions = xmalloc(sizeof *netdev_actions);
1553 ovs_refcount_init(&netdev_actions->ref_cnt);
1554 netdev_actions->actions = xmemdup(actions, size);
1555 netdev_actions->size = size;
1557 return netdev_actions;
1560 /* Increments 'actions''s refcount. */
1561 struct dp_netdev_actions *
1562 dp_netdev_actions_ref(const struct dp_netdev_actions *actions_)
1564 struct dp_netdev_actions *actions;
1566 actions = CONST_CAST(struct dp_netdev_actions *, actions_);
1568 ovs_refcount_ref(&actions->ref_cnt);
1573 /* Decrements 'actions''s refcount and frees 'actions' if the refcount reaches
1576 dp_netdev_actions_unref(struct dp_netdev_actions *actions)
1578 if (actions && ovs_refcount_unref(&actions->ref_cnt) == 1) {
1579 free(actions->actions);
1585 dp_forwarder_main(void *f_)
1587 struct dp_forwarder *f = f_;
1588 struct dp_netdev *dp = f->dp;
1589 struct ofpbuf packet;
1591 f->name = xasprintf("forwarder_%u", ovsthread_id_self());
1592 set_subprogram_name("%s", f->name);
1594 ofpbuf_init(&packet, 0);
1595 while (!latch_is_set(&dp->exit_latch)) {
1596 bool received_anything;
1599 ovs_rwlock_rdlock(&dp->port_rwlock);
1600 for (i = 0; i < 50; i++) {
1601 struct dp_netdev_port *port;
1603 received_anything = false;
1604 HMAP_FOR_EACH (port, node, &f->dp->ports) {
1606 && port->node.hash >= f->min_hash
1607 && port->node.hash <= f->max_hash) {
1612 if (netdev_get_mtu(port->netdev, &mtu)) {
1613 mtu = ETH_PAYLOAD_MAX;
1615 buf_size = DP_NETDEV_HEADROOM + VLAN_ETH_HEADER_LEN + mtu;
1617 ofpbuf_clear(&packet);
1618 ofpbuf_reserve_with_tailroom(&packet, DP_NETDEV_HEADROOM,
1621 error = netdev_rx_recv(port->rx, &packet);
1623 struct pkt_metadata md
1624 = PKT_METADATA_INITIALIZER(port->port_no);
1626 dp_netdev_port_input(dp, &packet, &md);
1627 received_anything = true;
1628 } else if (error != EAGAIN && error != EOPNOTSUPP) {
1629 static struct vlog_rate_limit rl
1630 = VLOG_RATE_LIMIT_INIT(1, 5);
1632 VLOG_ERR_RL(&rl, "error receiving data from %s: %s",
1633 netdev_get_name(port->netdev),
1634 ovs_strerror(error));
1639 if (!received_anything) {
1644 if (received_anything) {
1645 poll_immediate_wake();
1647 struct dp_netdev_port *port;
1649 HMAP_FOR_EACH (port, node, &f->dp->ports)
1651 && port->node.hash >= f->min_hash
1652 && port->node.hash <= f->max_hash) {
1653 netdev_rx_wait(port->rx);
1655 seq_wait(dp->port_seq, seq_read(dp->port_seq));
1656 latch_wait(&dp->exit_latch);
1658 ovs_rwlock_unlock(&dp->port_rwlock);
1662 ofpbuf_uninit(&packet);
1670 dp_netdev_set_threads(struct dp_netdev *dp, int n)
1674 if (n == dp->n_forwarders) {
1678 /* Stop existing threads. */
1679 latch_set(&dp->exit_latch);
1680 for (i = 0; i < dp->n_forwarders; i++) {
1681 struct dp_forwarder *f = &dp->forwarders[i];
1683 xpthread_join(f->thread, NULL);
1685 latch_poll(&dp->exit_latch);
1686 free(dp->forwarders);
1688 /* Start new threads. */
1689 dp->forwarders = xmalloc(n * sizeof *dp->forwarders);
1690 dp->n_forwarders = n;
1691 for (i = 0; i < n; i++) {
1692 struct dp_forwarder *f = &dp->forwarders[i];
1695 f->min_hash = UINT32_MAX / n * i;
1696 f->max_hash = UINT32_MAX / n * (i + 1) - 1;
1698 f->max_hash = UINT32_MAX;
1700 xpthread_create(&f->thread, NULL, dp_forwarder_main, f);
1705 dp_netdev_flow_used(struct dp_netdev_flow *netdev_flow,
1706 const struct ofpbuf *packet)
1707 OVS_REQUIRES(netdev_flow->mutex)
1709 netdev_flow->used = time_msec();
1710 netdev_flow->packet_count++;
1711 netdev_flow->byte_count += packet->size;
1712 netdev_flow->tcp_flags |= packet_get_tcp_flags(packet, &netdev_flow->flow);
1716 dp_netdev_port_input(struct dp_netdev *dp, struct ofpbuf *packet,
1717 struct pkt_metadata *md)
1718 OVS_REQ_RDLOCK(dp->port_rwlock)
1720 struct dp_netdev_flow *netdev_flow;
1723 if (packet->size < ETH_HEADER_LEN) {
1726 flow_extract(packet, md, &key);
1727 netdev_flow = dp_netdev_lookup_flow(dp, &key);
1729 struct dp_netdev_actions *actions;
1731 ovs_mutex_lock(&netdev_flow->mutex);
1732 dp_netdev_flow_used(netdev_flow, packet);
1733 actions = dp_netdev_actions_ref(netdev_flow->actions);
1734 ovs_mutex_unlock(&netdev_flow->mutex);
1736 dp_netdev_execute_actions(dp, &key, packet, md,
1737 actions->actions, actions->size);
1738 dp_netdev_actions_unref(actions);
1739 dp_netdev_flow_unref(netdev_flow);
1740 ovsthread_counter_inc(dp->n_hit, 1);
1742 ovsthread_counter_inc(dp->n_missed, 1);
1743 dp_netdev_output_userspace(dp, packet, DPIF_UC_MISS, &key, NULL);
1748 dp_netdev_output_userspace(struct dp_netdev *dp, struct ofpbuf *packet,
1749 int queue_no, const struct flow *flow,
1750 const struct nlattr *userdata)
1751 OVS_EXCLUDED(dp->queue_mutex)
1753 struct dp_netdev_queue *q = &dp->queues[queue_no];
1756 ovs_mutex_lock(&dp->queue_mutex);
1757 if (q->head - q->tail < MAX_QUEUE_LEN) {
1758 struct dp_netdev_upcall *u = &q->upcalls[q->head++ & QUEUE_MASK];
1759 struct dpif_upcall *upcall = &u->upcall;
1760 struct ofpbuf *buf = &u->buf;
1763 upcall->type = queue_no;
1765 /* Allocate buffer big enough for everything. */
1766 buf_size = ODPUTIL_FLOW_KEY_BYTES;
1768 buf_size += NLA_ALIGN(userdata->nla_len);
1770 ofpbuf_init(buf, buf_size);
1773 odp_flow_key_from_flow(buf, flow, flow->in_port.odp_port);
1774 upcall->key = buf->data;
1775 upcall->key_len = buf->size;
1779 upcall->userdata = ofpbuf_put(buf, userdata,
1780 NLA_ALIGN(userdata->nla_len));
1783 /* Steal packet data. */
1784 ovs_assert(packet->source == OFPBUF_MALLOC);
1785 upcall->packet = *packet;
1786 ofpbuf_use(packet, NULL, 0);
1788 seq_change(dp->queue_seq);
1792 ovsthread_counter_inc(dp->n_lost, 1);
1795 ovs_mutex_unlock(&dp->queue_mutex);
1800 struct dp_netdev_execute_aux {
1801 struct dp_netdev *dp;
1802 const struct flow *key;
1806 dp_execute_cb(void *aux_, struct ofpbuf *packet,
1807 const struct pkt_metadata *md OVS_UNUSED,
1808 const struct nlattr *a, bool may_steal)
1809 OVS_NO_THREAD_SAFETY_ANALYSIS
1811 struct dp_netdev_execute_aux *aux = aux_;
1812 int type = nl_attr_type(a);
1813 struct dp_netdev_port *p;
1815 switch ((enum ovs_action_attr)type) {
1816 case OVS_ACTION_ATTR_OUTPUT:
1817 p = dp_netdev_lookup_port(aux->dp, u32_to_odp(nl_attr_get_u32(a)));
1819 netdev_send(p->netdev, packet);
1823 case OVS_ACTION_ATTR_USERSPACE: {
1824 const struct nlattr *userdata;
1826 userdata = nl_attr_find_nested(a, OVS_USERSPACE_ATTR_USERDATA);
1828 /* Make a copy if we are not allowed to steal the packet's data. */
1830 packet = ofpbuf_clone_with_headroom(packet, DP_NETDEV_HEADROOM);
1832 dp_netdev_output_userspace(aux->dp, packet, DPIF_UC_ACTION, aux->key,
1835 ofpbuf_uninit(packet);
1839 case OVS_ACTION_ATTR_PUSH_VLAN:
1840 case OVS_ACTION_ATTR_POP_VLAN:
1841 case OVS_ACTION_ATTR_PUSH_MPLS:
1842 case OVS_ACTION_ATTR_POP_MPLS:
1843 case OVS_ACTION_ATTR_SET:
1844 case OVS_ACTION_ATTR_SAMPLE:
1845 case OVS_ACTION_ATTR_UNSPEC:
1846 case __OVS_ACTION_ATTR_MAX:
1852 dp_netdev_execute_actions(struct dp_netdev *dp, const struct flow *key,
1853 struct ofpbuf *packet, struct pkt_metadata *md,
1854 const struct nlattr *actions, size_t actions_len)
1855 OVS_REQ_RDLOCK(dp->port_rwlock)
1857 struct dp_netdev_execute_aux aux = {dp, key};
1859 odp_execute_actions(&aux, packet, md, actions, actions_len, dp_execute_cb);
1862 const struct dpif_class dpif_netdev_class = {
1864 dpif_netdev_enumerate,
1865 dpif_netdev_port_open_type,
1868 dpif_netdev_destroy,
1871 dpif_netdev_get_stats,
1872 dpif_netdev_port_add,
1873 dpif_netdev_port_del,
1874 dpif_netdev_port_query_by_number,
1875 dpif_netdev_port_query_by_name,
1876 NULL, /* port_get_pid */
1877 dpif_netdev_port_dump_start,
1878 dpif_netdev_port_dump_next,
1879 dpif_netdev_port_dump_done,
1880 dpif_netdev_port_poll,
1881 dpif_netdev_port_poll_wait,
1882 dpif_netdev_flow_get,
1883 dpif_netdev_flow_put,
1884 dpif_netdev_flow_del,
1885 dpif_netdev_flow_flush,
1886 dpif_netdev_flow_dump_state_init,
1887 dpif_netdev_flow_dump_start,
1888 dpif_netdev_flow_dump_next,
1890 dpif_netdev_flow_dump_done,
1891 dpif_netdev_flow_dump_state_uninit,
1892 dpif_netdev_execute,
1894 dpif_netdev_recv_set,
1895 dpif_netdev_queue_to_priority,
1897 dpif_netdev_recv_wait,
1898 dpif_netdev_recv_purge,
1902 dpif_dummy_change_port_number(struct unixctl_conn *conn, int argc OVS_UNUSED,
1903 const char *argv[], void *aux OVS_UNUSED)
1905 struct dp_netdev_port *port;
1906 struct dp_netdev *dp;
1909 ovs_mutex_lock(&dp_netdev_mutex);
1910 dp = shash_find_data(&dp_netdevs, argv[1]);
1911 if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
1912 ovs_mutex_unlock(&dp_netdev_mutex);
1913 unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
1916 ovs_refcount_ref(&dp->ref_cnt);
1917 ovs_mutex_unlock(&dp_netdev_mutex);
1919 ovs_rwlock_wrlock(&dp->port_rwlock);
1920 if (get_port_by_name(dp, argv[2], &port)) {
1921 unixctl_command_reply_error(conn, "unknown port");
1925 port_no = u32_to_odp(atoi(argv[3]));
1926 if (!port_no || port_no == ODPP_NONE) {
1927 unixctl_command_reply_error(conn, "bad port number");
1930 if (dp_netdev_lookup_port(dp, port_no)) {
1931 unixctl_command_reply_error(conn, "port number already in use");
1934 hmap_remove(&dp->ports, &port->node);
1935 port->port_no = port_no;
1936 hmap_insert(&dp->ports, &port->node, hash_int(odp_to_u32(port_no), 0));
1937 seq_change(dp->port_seq);
1938 unixctl_command_reply(conn, NULL);
1941 ovs_rwlock_unlock(&dp->port_rwlock);
1942 dp_netdev_unref(dp);
1946 dpif_dummy_register__(const char *type)
1948 struct dpif_class *class;
1950 class = xmalloc(sizeof *class);
1951 *class = dpif_netdev_class;
1952 class->type = xstrdup(type);
1953 dp_register_provider(class);
1957 dpif_dummy_register(bool override)
1964 dp_enumerate_types(&types);
1965 SSET_FOR_EACH (type, &types) {
1966 if (!dp_unregister_provider(type)) {
1967 dpif_dummy_register__(type);
1970 sset_destroy(&types);
1973 dpif_dummy_register__("dummy");
1975 unixctl_command_register("dpif-dummy/change-port-number",
1976 "DP PORT NEW-NUMBER",
1977 3, 3, dpif_dummy_change_port_number, NULL);