2 * Copyright (c) 2008, 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.
22 #include <netinet/in.h>
29 #include "dynamic-string.h"
30 #include "fatal-signal.h"
33 #include "netdev-dpdk.h"
34 #include "netdev-provider.h"
35 #include "netdev-vport.h"
37 #include "openflow/openflow.h"
39 #include "poll-loop.h"
46 VLOG_DEFINE_THIS_MODULE(netdev);
48 COVERAGE_DEFINE(netdev_received);
49 COVERAGE_DEFINE(netdev_sent);
50 COVERAGE_DEFINE(netdev_add_router);
51 COVERAGE_DEFINE(netdev_get_stats);
53 struct netdev_saved_flags {
54 struct netdev *netdev;
55 struct list node; /* In struct netdev's saved_flags_list. */
56 enum netdev_flags saved_flags;
57 enum netdev_flags saved_values;
60 /* Protects 'netdev_shash' and the mutable members of struct netdev. */
61 static struct ovs_mutex netdev_mutex = OVS_MUTEX_INITIALIZER;
63 /* All created network devices. */
64 static struct shash netdev_shash OVS_GUARDED_BY(netdev_mutex)
65 = SHASH_INITIALIZER(&netdev_shash);
67 /* Protects 'netdev_classes' against insertions or deletions.
69 * This is a recursive mutex to allow recursive acquisition when calling into
70 * providers. For example, netdev_run() calls into provider 'run' functions,
71 * which might reasonably want to call one of the netdev functions that takes
72 * netdev_class_mutex. */
73 static struct ovs_mutex netdev_class_mutex OVS_ACQ_BEFORE(netdev_mutex);
75 /* Contains 'struct netdev_registered_class'es. */
76 static struct hmap netdev_classes OVS_GUARDED_BY(netdev_class_mutex)
77 = HMAP_INITIALIZER(&netdev_classes);
79 struct netdev_registered_class {
80 struct hmap_node hmap_node; /* In 'netdev_classes', by class->type. */
81 const struct netdev_class *class;
82 atomic_int ref_cnt; /* Number of 'struct netdev's of this class. */
85 /* This is set pretty low because we probably won't learn anything from the
86 * additional log messages. */
87 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
89 static void restore_all_flags(void *aux OVS_UNUSED);
90 void update_device_args(struct netdev *, const struct shash *args);
93 netdev_n_rxq(const struct netdev *netdev)
99 netdev_is_pmd(const struct netdev *netdev)
101 return !strcmp(netdev->netdev_class->type, "dpdk");
105 netdev_class_mutex_initialize(void)
106 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
108 static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
110 if (ovsthread_once_start(&once)) {
111 ovs_mutex_init_recursive(&netdev_class_mutex);
112 ovsthread_once_done(&once);
117 netdev_initialize(void)
118 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
120 static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
122 if (ovsthread_once_start(&once)) {
123 netdev_class_mutex_initialize();
125 fatal_signal_add_hook(restore_all_flags, NULL, NULL, true);
126 netdev_vport_patch_register();
129 netdev_register_provider(&netdev_linux_class);
130 netdev_register_provider(&netdev_internal_class);
131 netdev_register_provider(&netdev_tap_class);
132 netdev_vport_tunnel_register();
134 #if defined(__FreeBSD__) || defined(__NetBSD__)
135 netdev_register_provider(&netdev_tap_class);
136 netdev_register_provider(&netdev_bsd_class);
138 netdev_register_provider(&netdev_tunnel_class);
139 netdev_register_provider(&netdev_pltap_class);
140 netdev_dpdk_register();
142 ovsthread_once_done(&once);
146 /* Performs periodic work needed by all the various kinds of netdevs.
148 * If your program opens any netdevs, it must call this function within its
152 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
154 struct netdev_registered_class *rc;
157 ovs_mutex_lock(&netdev_class_mutex);
158 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
159 if (rc->class->run) {
163 ovs_mutex_unlock(&netdev_class_mutex);
166 /* Arranges for poll_block() to wake up when netdev_run() needs to be called.
168 * If your program opens any netdevs, it must call this function within its
172 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
174 struct netdev_registered_class *rc;
176 ovs_mutex_lock(&netdev_class_mutex);
177 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
178 if (rc->class->wait) {
182 ovs_mutex_unlock(&netdev_class_mutex);
185 static struct netdev_registered_class *
186 netdev_lookup_class(const char *type)
187 OVS_REQ_RDLOCK(netdev_class_mutex)
189 struct netdev_registered_class *rc;
191 HMAP_FOR_EACH_WITH_HASH (rc, hmap_node, hash_string(type, 0),
193 if (!strcmp(type, rc->class->type)) {
200 /* Initializes and registers a new netdev provider. After successful
201 * registration, new netdevs of that type can be opened using netdev_open(). */
203 netdev_register_provider(const struct netdev_class *new_class)
204 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
208 netdev_class_mutex_initialize();
209 ovs_mutex_lock(&netdev_class_mutex);
210 if (netdev_lookup_class(new_class->type)) {
211 VLOG_WARN("attempted to register duplicate netdev provider: %s",
215 error = new_class->init ? new_class->init() : 0;
217 struct netdev_registered_class *rc;
219 rc = xmalloc(sizeof *rc);
220 hmap_insert(&netdev_classes, &rc->hmap_node,
221 hash_string(new_class->type, 0));
222 rc->class = new_class;
223 atomic_init(&rc->ref_cnt, 0);
225 VLOG_ERR("failed to initialize %s network device class: %s",
226 new_class->type, ovs_strerror(error));
229 ovs_mutex_unlock(&netdev_class_mutex);
234 /* Unregisters a netdev provider. 'type' must have been previously
235 * registered and not currently be in use by any netdevs. After unregistration
236 * new netdevs of that type cannot be opened using netdev_open(). */
238 netdev_unregister_provider(const char *type)
239 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
241 struct netdev_registered_class *rc;
244 ovs_mutex_lock(&netdev_class_mutex);
245 rc = netdev_lookup_class(type);
247 VLOG_WARN("attempted to unregister a netdev provider that is not "
248 "registered: %s", type);
249 error = EAFNOSUPPORT;
253 atomic_read(&rc->ref_cnt, &ref_cnt);
255 hmap_remove(&netdev_classes, &rc->hmap_node);
259 VLOG_WARN("attempted to unregister in use netdev provider: %s",
264 ovs_mutex_unlock(&netdev_class_mutex);
269 /* Clears 'types' and enumerates the types of all currently registered netdev
270 * providers into it. The caller must first initialize the sset. */
272 netdev_enumerate_types(struct sset *types)
273 OVS_EXCLUDED(netdev_mutex)
275 struct netdev_registered_class *rc;
280 ovs_mutex_lock(&netdev_class_mutex);
281 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
282 sset_add(types, rc->class->type);
284 ovs_mutex_unlock(&netdev_class_mutex);
287 /* Check that the network device name is not the same as any of the registered
288 * vport providers' dpif_port name (dpif_port is NULL if the vport provider
289 * does not define it) or the datapath internal port name (e.g. ovs-system).
291 * Returns true if there is a name conflict, false otherwise. */
293 netdev_is_reserved_name(const char *name)
294 OVS_EXCLUDED(netdev_mutex)
296 struct netdev_registered_class *rc;
300 ovs_mutex_lock(&netdev_class_mutex);
301 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
302 const char *dpif_port = netdev_vport_class_get_dpif_port(rc->class);
303 if (dpif_port && !strcmp(dpif_port, name)) {
304 ovs_mutex_unlock(&netdev_class_mutex);
308 ovs_mutex_unlock(&netdev_class_mutex);
310 if (!strncmp(name, "ovs-", 4)) {
315 dp_enumerate_types(&types);
316 SSET_FOR_EACH (type, &types) {
317 if (!strcmp(name+4, type)) {
318 sset_destroy(&types);
322 sset_destroy(&types);
328 /* Opens the network device named 'name' (e.g. "eth0") of the specified 'type'
329 * (e.g. "system") and returns zero if successful, otherwise a positive errno
330 * value. On success, sets '*netdevp' to the new network device, otherwise to
333 * Some network devices may need to be configured (with netdev_set_config())
334 * before they can be used. */
336 netdev_open(const char *name, const char *type, struct netdev **netdevp)
337 OVS_EXCLUDED(netdev_mutex)
339 struct netdev *netdev;
344 ovs_mutex_lock(&netdev_class_mutex);
345 ovs_mutex_lock(&netdev_mutex);
346 netdev = shash_find_data(&netdev_shash, name);
348 struct netdev_registered_class *rc;
350 rc = netdev_lookup_class(type && type[0] ? type : "system");
352 netdev = rc->class->alloc();
354 memset(netdev, 0, sizeof *netdev);
355 netdev->netdev_class = rc->class;
356 netdev->name = xstrdup(name);
357 netdev->change_seq = 1;
358 netdev->node = shash_add(&netdev_shash, name, netdev);
360 /* By default enable one rx queue per netdev. */
361 if (netdev->netdev_class->rxq_alloc) {
366 list_init(&netdev->saved_flags_list);
368 error = rc->class->construct(netdev);
372 atomic_add(&rc->ref_cnt, 1, &old_ref_cnt);
373 netdev_change_seq_changed(netdev);
376 ovs_assert(list_is_empty(&netdev->saved_flags_list));
377 shash_delete(&netdev_shash, netdev->node);
378 rc->class->dealloc(netdev);
384 VLOG_WARN("could not create netdev %s of unknown type %s",
386 error = EAFNOSUPPORT;
392 ovs_mutex_unlock(&netdev_mutex);
393 ovs_mutex_unlock(&netdev_class_mutex);
404 /* Returns a reference to 'netdev_' for the caller to own. Returns null if
405 * 'netdev_' is null. */
407 netdev_ref(const struct netdev *netdev_)
408 OVS_EXCLUDED(netdev_mutex)
410 struct netdev *netdev = CONST_CAST(struct netdev *, netdev_);
413 ovs_mutex_lock(&netdev_mutex);
414 ovs_assert(netdev->ref_cnt > 0);
416 ovs_mutex_unlock(&netdev_mutex);
421 /* Reconfigures the device 'netdev' with 'args'. 'args' may be empty
422 * or NULL if none are needed. */
424 netdev_set_config(struct netdev *netdev, const struct smap *args)
425 OVS_EXCLUDED(netdev_mutex)
427 if (netdev->netdev_class->set_config) {
428 const struct smap no_args = SMAP_INITIALIZER(&no_args);
431 error = netdev->netdev_class->set_config(netdev,
432 args ? args : &no_args);
434 VLOG_WARN("%s: could not set configuration (%s)",
435 netdev_get_name(netdev), ovs_strerror(error));
438 } else if (args && !smap_is_empty(args)) {
439 VLOG_WARN("%s: arguments provided to device that is not configurable",
440 netdev_get_name(netdev));
445 /* Returns the current configuration for 'netdev' in 'args'. The caller must
446 * have already initialized 'args' with smap_init(). Returns 0 on success, in
447 * which case 'args' will be filled with 'netdev''s configuration. On failure
448 * returns a positive errno value, in which case 'args' will be empty.
450 * The caller owns 'args' and its contents and must eventually free them with
453 netdev_get_config(const struct netdev *netdev, struct smap *args)
454 OVS_EXCLUDED(netdev_mutex)
459 if (netdev->netdev_class->get_config) {
460 error = netdev->netdev_class->get_config(netdev, args);
471 const struct netdev_tunnel_config *
472 netdev_get_tunnel_config(const struct netdev *netdev)
473 OVS_EXCLUDED(netdev_mutex)
475 if (netdev->netdev_class->get_tunnel_config) {
476 return netdev->netdev_class->get_tunnel_config(netdev);
483 netdev_unref(struct netdev *dev)
484 OVS_RELEASES(netdev_mutex)
486 ovs_assert(dev->ref_cnt);
487 if (!--dev->ref_cnt) {
488 const struct netdev_class *class = dev->netdev_class;
489 struct netdev_registered_class *rc;
492 dev->netdev_class->destruct(dev);
494 shash_delete(&netdev_shash, dev->node);
496 dev->netdev_class->dealloc(dev);
497 ovs_mutex_unlock(&netdev_mutex);
499 ovs_mutex_lock(&netdev_class_mutex);
500 rc = netdev_lookup_class(class->type);
501 atomic_sub(&rc->ref_cnt, 1, &old_ref_cnt);
502 ovs_assert(old_ref_cnt > 0);
503 ovs_mutex_unlock(&netdev_class_mutex);
505 ovs_mutex_unlock(&netdev_mutex);
509 /* Closes and destroys 'netdev'. */
511 netdev_close(struct netdev *netdev)
512 OVS_EXCLUDED(netdev_mutex)
515 ovs_mutex_lock(&netdev_mutex);
516 netdev_unref(netdev);
520 /* Parses 'netdev_name_', which is of the form [type@]name into its component
521 * pieces. 'name' and 'type' must be freed by the caller. */
523 netdev_parse_name(const char *netdev_name_, char **name, char **type)
525 char *netdev_name = xstrdup(netdev_name_);
528 separator = strchr(netdev_name, '@');
532 *name = xstrdup(separator + 1);
535 *type = xstrdup("system");
539 /* Attempts to open a netdev_rxq handle for obtaining packets received on
540 * 'netdev'. On success, returns 0 and stores a nonnull 'netdev_rxq *' into
541 * '*rxp'. On failure, returns a positive errno value and stores NULL into
544 * Some kinds of network devices might not support receiving packets. This
545 * function returns EOPNOTSUPP in that case.*/
547 netdev_rxq_open(struct netdev *netdev, struct netdev_rxq **rxp, int id)
548 OVS_EXCLUDED(netdev_mutex)
552 if (netdev->netdev_class->rxq_alloc && id < netdev->n_rxq) {
553 struct netdev_rxq *rx = netdev->netdev_class->rxq_alloc();
557 error = netdev->netdev_class->rxq_construct(rx);
559 ovs_mutex_lock(&netdev_mutex);
561 ovs_mutex_unlock(&netdev_mutex);
566 netdev->netdev_class->rxq_dealloc(rx);
580 netdev_rxq_close(struct netdev_rxq *rx)
581 OVS_EXCLUDED(netdev_mutex)
584 struct netdev *netdev = rx->netdev;
585 netdev->netdev_class->rxq_destruct(rx);
586 netdev->netdev_class->rxq_dealloc(rx);
587 netdev_close(netdev);
591 /* Attempts to receive batch of packets from 'rx'.
593 * Returns EAGAIN immediately if no packet is ready to be received.
595 * Returns EMSGSIZE, and discards the packet, if the received packet is longer
596 * than 'ofpbuf_tailroom(buffer)'.
598 * It is advised that the tailroom of 'buffer' should be
599 * VLAN_HEADER_LEN bytes longer than the MTU to allow space for an
600 * out-of-band VLAN header to be added to the packet. At the very least,
601 * 'buffer' must have at least ETH_TOTAL_MIN bytes of tailroom.
603 * This function may be set to null if it would always return EOPNOTSUPP
606 netdev_rxq_recv(struct netdev_rxq *rx, struct ofpbuf **buffers, int *cnt)
610 retval = rx->netdev->netdev_class->rxq_recv(rx, buffers, cnt);
612 COVERAGE_INC(netdev_received);
617 /* Arranges for poll_block() to wake up when a packet is ready to be received
620 netdev_rxq_wait(struct netdev_rxq *rx)
622 rx->netdev->netdev_class->rxq_wait(rx);
625 /* Discards any packets ready to be received on 'rx'. */
627 netdev_rxq_drain(struct netdev_rxq *rx)
629 return (rx->netdev->netdev_class->rxq_drain
630 ? rx->netdev->netdev_class->rxq_drain(rx)
634 /* Sends 'buffer' on 'netdev'. Returns 0 if successful, otherwise a positive
635 * errno value. Returns EAGAIN without blocking if the packet cannot be queued
636 * immediately. Returns EMSGSIZE if a partial packet was transmitted or if
637 * the packet is too big or too small to transmit on the device.
639 * To retain ownership of 'buffer' caller can set may_steal to false.
641 * The kernel maintains a packet transmission queue, so the caller is not
642 * expected to do additional queuing of packets.
644 * Some network devices may not implement support for this function. In such
645 * cases this function will always return EOPNOTSUPP. */
647 netdev_send(struct netdev *netdev, struct ofpbuf *buffer, bool may_steal)
651 error = (netdev->netdev_class->send
652 ? netdev->netdev_class->send(netdev, buffer, may_steal)
655 COVERAGE_INC(netdev_sent);
660 /* Registers with the poll loop to wake up from the next call to poll_block()
661 * when the packet transmission queue has sufficient room to transmit a packet
662 * with netdev_send().
664 * The kernel maintains a packet transmission queue, so the client is not
665 * expected to do additional queuing of packets. Thus, this function is
666 * unlikely to ever be used. It is included for completeness. */
668 netdev_send_wait(struct netdev *netdev)
670 if (netdev->netdev_class->send_wait) {
671 netdev->netdev_class->send_wait(netdev);
675 /* Attempts to set 'netdev''s MAC address to 'mac'. Returns 0 if successful,
676 * otherwise a positive errno value. */
678 netdev_set_etheraddr(struct netdev *netdev, const uint8_t mac[ETH_ADDR_LEN])
680 return netdev->netdev_class->set_etheraddr(netdev, mac);
683 /* Retrieves 'netdev''s MAC address. If successful, returns 0 and copies the
684 * the MAC address into 'mac'. On failure, returns a positive errno value and
685 * clears 'mac' to all-zeros. */
687 netdev_get_etheraddr(const struct netdev *netdev, uint8_t mac[ETH_ADDR_LEN])
689 return netdev->netdev_class->get_etheraddr(netdev, mac);
692 /* Returns the name of the network device that 'netdev' represents,
693 * e.g. "eth0". The caller must not modify or free the returned string. */
695 netdev_get_name(const struct netdev *netdev)
700 /* Retrieves the MTU of 'netdev'. The MTU is the maximum size of transmitted
701 * (and received) packets, in bytes, not including the hardware header; thus,
702 * this is typically 1500 bytes for Ethernet devices.
704 * If successful, returns 0 and stores the MTU size in '*mtup'. Returns
705 * EOPNOTSUPP if 'netdev' does not have an MTU (as e.g. some tunnels do not).
706 * On other failure, returns a positive errno value. On failure, sets '*mtup'
709 netdev_get_mtu(const struct netdev *netdev, int *mtup)
711 const struct netdev_class *class = netdev->netdev_class;
714 error = class->get_mtu ? class->get_mtu(netdev, mtup) : EOPNOTSUPP;
717 if (error != EOPNOTSUPP) {
718 VLOG_DBG_RL(&rl, "failed to retrieve MTU for network device %s: "
719 "%s", netdev_get_name(netdev), ovs_strerror(error));
725 /* Sets the MTU of 'netdev'. The MTU is the maximum size of transmitted
726 * (and received) packets, in bytes.
728 * If successful, returns 0. Returns EOPNOTSUPP if 'netdev' does not have an
729 * MTU (as e.g. some tunnels do not). On other failure, returns a positive
732 netdev_set_mtu(const struct netdev *netdev, int mtu)
734 const struct netdev_class *class = netdev->netdev_class;
737 error = class->set_mtu ? class->set_mtu(netdev, mtu) : EOPNOTSUPP;
738 if (error && error != EOPNOTSUPP) {
739 VLOG_DBG_RL(&rl, "failed to set MTU for network device %s: %s",
740 netdev_get_name(netdev), ovs_strerror(error));
746 /* Returns the ifindex of 'netdev', if successful, as a positive number. On
747 * failure, returns a negative errno value.
749 * The desired semantics of the ifindex value are a combination of those
750 * specified by POSIX for if_nametoindex() and by SNMP for ifIndex. An ifindex
751 * value should be unique within a host and remain stable at least until
752 * reboot. SNMP says an ifindex "ranges between 1 and the value of ifNumber"
753 * but many systems do not follow this rule anyhow.
755 * Some network devices may not implement support for this function. In such
756 * cases this function will always return -EOPNOTSUPP.
759 netdev_get_ifindex(const struct netdev *netdev)
761 int (*get_ifindex)(const struct netdev *);
763 get_ifindex = netdev->netdev_class->get_ifindex;
765 return get_ifindex ? get_ifindex(netdev) : -EOPNOTSUPP;
768 /* Stores the features supported by 'netdev' into each of '*current',
769 * '*advertised', '*supported', and '*peer' that are non-null. Each value is a
770 * bitmap of "enum ofp_port_features" bits, in host byte order. Returns 0 if
771 * successful, otherwise a positive errno value. On failure, all of the
772 * passed-in values are set to 0.
774 * Some network devices may not implement support for this function. In such
775 * cases this function will always return EOPNOTSUPP. */
777 netdev_get_features(const struct netdev *netdev,
778 enum netdev_features *current,
779 enum netdev_features *advertised,
780 enum netdev_features *supported,
781 enum netdev_features *peer)
783 int (*get_features)(const struct netdev *netdev,
784 enum netdev_features *current,
785 enum netdev_features *advertised,
786 enum netdev_features *supported,
787 enum netdev_features *peer);
788 enum netdev_features dummy[4];
795 advertised = &dummy[1];
798 supported = &dummy[2];
804 get_features = netdev->netdev_class->get_features;
806 ? get_features(netdev, current, advertised, supported,
810 *current = *advertised = *supported = *peer = 0;
815 /* Returns the maximum speed of a network connection that has the NETDEV_F_*
816 * bits in 'features', in bits per second. If no bits that indicate a speed
817 * are set in 'features', returns 'default_bps'. */
819 netdev_features_to_bps(enum netdev_features features,
820 uint64_t default_bps)
823 F_1000000MB = NETDEV_F_1TB_FD,
824 F_100000MB = NETDEV_F_100GB_FD,
825 F_40000MB = NETDEV_F_40GB_FD,
826 F_10000MB = NETDEV_F_10GB_FD,
827 F_1000MB = NETDEV_F_1GB_HD | NETDEV_F_1GB_FD,
828 F_100MB = NETDEV_F_100MB_HD | NETDEV_F_100MB_FD,
829 F_10MB = NETDEV_F_10MB_HD | NETDEV_F_10MB_FD
832 return ( features & F_1000000MB ? UINT64_C(1000000000000)
833 : features & F_100000MB ? UINT64_C(100000000000)
834 : features & F_40000MB ? UINT64_C(40000000000)
835 : features & F_10000MB ? UINT64_C(10000000000)
836 : features & F_1000MB ? UINT64_C(1000000000)
837 : features & F_100MB ? UINT64_C(100000000)
838 : features & F_10MB ? UINT64_C(10000000)
842 /* Returns true if any of the NETDEV_F_* bits that indicate a full-duplex link
843 * are set in 'features', otherwise false. */
845 netdev_features_is_full_duplex(enum netdev_features features)
847 return (features & (NETDEV_F_10MB_FD | NETDEV_F_100MB_FD | NETDEV_F_1GB_FD
848 | NETDEV_F_10GB_FD | NETDEV_F_40GB_FD
849 | NETDEV_F_100GB_FD | NETDEV_F_1TB_FD)) != 0;
852 /* Set the features advertised by 'netdev' to 'advertise'. Returns 0 if
853 * successful, otherwise a positive errno value. */
855 netdev_set_advertisements(struct netdev *netdev,
856 enum netdev_features advertise)
858 return (netdev->netdev_class->set_advertisements
859 ? netdev->netdev_class->set_advertisements(
864 /* If 'netdev' has an assigned IPv4 address, sets '*address' to that address
865 * and '*netmask' to its netmask and returns 0. Otherwise, returns a positive
866 * errno value and sets '*address' to 0 (INADDR_ANY).
868 * The following error values have well-defined meanings:
870 * - EADDRNOTAVAIL: 'netdev' has no assigned IPv4 address.
872 * - EOPNOTSUPP: No IPv4 network stack attached to 'netdev'.
874 * 'address' or 'netmask' or both may be null, in which case the address or
875 * netmask is not reported. */
877 netdev_get_in4(const struct netdev *netdev,
878 struct in_addr *address_, struct in_addr *netmask_)
880 struct in_addr address;
881 struct in_addr netmask;
884 error = (netdev->netdev_class->get_in4
885 ? netdev->netdev_class->get_in4(netdev,
889 address_->s_addr = error ? 0 : address.s_addr;
892 netmask_->s_addr = error ? 0 : netmask.s_addr;
897 /* Assigns 'addr' as 'netdev''s IPv4 address and 'mask' as its netmask. If
898 * 'addr' is INADDR_ANY, 'netdev''s IPv4 address is cleared. Returns a
899 * positive errno value. */
901 netdev_set_in4(struct netdev *netdev, struct in_addr addr, struct in_addr mask)
903 return (netdev->netdev_class->set_in4
904 ? netdev->netdev_class->set_in4(netdev, addr, mask)
908 /* Obtains ad IPv4 address from device name and save the address in
909 * in4. Returns 0 if successful, otherwise a positive errno value.
912 netdev_get_in4_by_name(const char *device_name, struct in_addr *in4)
914 struct netdev *netdev;
917 error = netdev_open(device_name, "system", &netdev);
919 in4->s_addr = htonl(0);
923 error = netdev_get_in4(netdev, in4, NULL);
924 netdev_close(netdev);
928 /* Adds 'router' as a default IP gateway for the TCP/IP stack that corresponds
931 netdev_add_router(struct netdev *netdev, struct in_addr router)
933 COVERAGE_INC(netdev_add_router);
934 return (netdev->netdev_class->add_router
935 ? netdev->netdev_class->add_router(netdev, router)
939 /* Looks up the next hop for 'host' for the TCP/IP stack that corresponds to
940 * 'netdev'. If a route cannot not be determined, sets '*next_hop' to 0,
941 * '*netdev_name' to null, and returns a positive errno value. Otherwise, if a
942 * next hop is found, stores the next hop gateway's address (0 if 'host' is on
943 * a directly connected network) in '*next_hop' and a copy of the name of the
944 * device to reach 'host' in '*netdev_name', and returns 0. The caller is
945 * responsible for freeing '*netdev_name' (by calling free()). */
947 netdev_get_next_hop(const struct netdev *netdev,
948 const struct in_addr *host, struct in_addr *next_hop,
951 int error = (netdev->netdev_class->get_next_hop
952 ? netdev->netdev_class->get_next_hop(
953 host, next_hop, netdev_name)
956 next_hop->s_addr = 0;
962 /* Populates 'smap' with status information.
964 * Populates 'smap' with 'netdev' specific status information. This
965 * information may be used to populate the status column of the Interface table
966 * as defined in ovs-vswitchd.conf.db(5). */
968 netdev_get_status(const struct netdev *netdev, struct smap *smap)
970 return (netdev->netdev_class->get_status
971 ? netdev->netdev_class->get_status(netdev, smap)
975 /* If 'netdev' has an assigned IPv6 address, sets '*in6' to that address and
976 * returns 0. Otherwise, returns a positive errno value and sets '*in6' to
977 * all-zero-bits (in6addr_any).
979 * The following error values have well-defined meanings:
981 * - EADDRNOTAVAIL: 'netdev' has no assigned IPv6 address.
983 * - EOPNOTSUPP: No IPv6 network stack attached to 'netdev'.
985 * 'in6' may be null, in which case the address itself is not reported. */
987 netdev_get_in6(const struct netdev *netdev, struct in6_addr *in6)
989 struct in6_addr dummy;
992 error = (netdev->netdev_class->get_in6
993 ? netdev->netdev_class->get_in6(netdev,
997 memset(in6, 0, sizeof *in6);
1002 /* On 'netdev', turns off the flags in 'off' and then turns on the flags in
1003 * 'on'. Returns 0 if successful, otherwise a positive errno value. */
1005 do_update_flags(struct netdev *netdev, enum netdev_flags off,
1006 enum netdev_flags on, enum netdev_flags *old_flagsp,
1007 struct netdev_saved_flags **sfp)
1008 OVS_EXCLUDED(netdev_mutex)
1010 struct netdev_saved_flags *sf = NULL;
1011 enum netdev_flags old_flags;
1014 error = netdev->netdev_class->update_flags(netdev, off & ~on, on,
1017 VLOG_WARN_RL(&rl, "failed to %s flags for network device %s: %s",
1018 off || on ? "set" : "get", netdev_get_name(netdev),
1019 ovs_strerror(error));
1021 } else if ((off || on) && sfp) {
1022 enum netdev_flags new_flags = (old_flags & ~off) | on;
1023 enum netdev_flags changed_flags = old_flags ^ new_flags;
1024 if (changed_flags) {
1025 ovs_mutex_lock(&netdev_mutex);
1026 *sfp = sf = xmalloc(sizeof *sf);
1027 sf->netdev = netdev;
1028 list_push_front(&netdev->saved_flags_list, &sf->node);
1029 sf->saved_flags = changed_flags;
1030 sf->saved_values = changed_flags & new_flags;
1033 ovs_mutex_unlock(&netdev_mutex);
1038 *old_flagsp = old_flags;
1047 /* Obtains the current flags for 'netdev' and stores them into '*flagsp'.
1048 * Returns 0 if successful, otherwise a positive errno value. On failure,
1049 * stores 0 into '*flagsp'. */
1051 netdev_get_flags(const struct netdev *netdev_, enum netdev_flags *flagsp)
1053 struct netdev *netdev = CONST_CAST(struct netdev *, netdev_);
1054 return do_update_flags(netdev, 0, 0, flagsp, NULL);
1057 /* Sets the flags for 'netdev' to 'flags'.
1058 * Returns 0 if successful, otherwise a positive errno value. */
1060 netdev_set_flags(struct netdev *netdev, enum netdev_flags flags,
1061 struct netdev_saved_flags **sfp)
1063 return do_update_flags(netdev, -1, flags, NULL, sfp);
1066 /* Turns on the specified 'flags' on 'netdev':
1068 * - On success, returns 0. If 'sfp' is nonnull, sets '*sfp' to a newly
1069 * allocated 'struct netdev_saved_flags *' that may be passed to
1070 * netdev_restore_flags() to restore the original values of 'flags' on
1071 * 'netdev' (this will happen automatically at program termination if
1072 * netdev_restore_flags() is never called) , or to NULL if no flags were
1075 * - On failure, returns a positive errno value. If 'sfp' is nonnull, sets
1076 * '*sfp' to NULL. */
1078 netdev_turn_flags_on(struct netdev *netdev, enum netdev_flags flags,
1079 struct netdev_saved_flags **sfp)
1081 return do_update_flags(netdev, 0, flags, NULL, sfp);
1084 /* Turns off the specified 'flags' on 'netdev'. See netdev_turn_flags_on() for
1085 * details of the interface. */
1087 netdev_turn_flags_off(struct netdev *netdev, enum netdev_flags flags,
1088 struct netdev_saved_flags **sfp)
1090 return do_update_flags(netdev, flags, 0, NULL, sfp);
1093 /* Restores the flags that were saved in 'sf', and destroys 'sf'.
1094 * Does nothing if 'sf' is NULL. */
1096 netdev_restore_flags(struct netdev_saved_flags *sf)
1097 OVS_EXCLUDED(netdev_mutex)
1100 struct netdev *netdev = sf->netdev;
1101 enum netdev_flags old_flags;
1103 netdev->netdev_class->update_flags(netdev,
1104 sf->saved_flags & sf->saved_values,
1105 sf->saved_flags & ~sf->saved_values,
1108 ovs_mutex_lock(&netdev_mutex);
1109 list_remove(&sf->node);
1111 netdev_unref(netdev);
1115 /* Looks up the ARP table entry for 'ip' on 'netdev'. If one exists and can be
1116 * successfully retrieved, it stores the corresponding MAC address in 'mac' and
1117 * returns 0. Otherwise, it returns a positive errno value; in particular,
1118 * ENXIO indicates that there is no ARP table entry for 'ip' on 'netdev'. */
1120 netdev_arp_lookup(const struct netdev *netdev,
1121 ovs_be32 ip, uint8_t mac[ETH_ADDR_LEN])
1123 int error = (netdev->netdev_class->arp_lookup
1124 ? netdev->netdev_class->arp_lookup(netdev, ip, mac)
1127 memset(mac, 0, ETH_ADDR_LEN);
1132 /* Returns true if carrier is active (link light is on) on 'netdev'. */
1134 netdev_get_carrier(const struct netdev *netdev)
1137 enum netdev_flags flags;
1140 netdev_get_flags(netdev, &flags);
1141 if (!(flags & NETDEV_UP)) {
1145 if (!netdev->netdev_class->get_carrier) {
1149 error = netdev->netdev_class->get_carrier(netdev, &carrier);
1151 VLOG_DBG("%s: failed to get network device carrier status, assuming "
1152 "down: %s", netdev_get_name(netdev), ovs_strerror(error));
1159 /* Returns the number of times 'netdev''s carrier has changed. */
1161 netdev_get_carrier_resets(const struct netdev *netdev)
1163 return (netdev->netdev_class->get_carrier_resets
1164 ? netdev->netdev_class->get_carrier_resets(netdev)
1168 /* Attempts to force netdev_get_carrier() to poll 'netdev''s MII registers for
1169 * link status instead of checking 'netdev''s carrier. 'netdev''s MII
1170 * registers will be polled once ever 'interval' milliseconds. If 'netdev'
1171 * does not support MII, another method may be used as a fallback. If
1172 * 'interval' is less than or equal to zero, reverts netdev_get_carrier() to
1173 * its normal behavior.
1175 * Returns 0 if successful, otherwise a positive errno value. */
1177 netdev_set_miimon_interval(struct netdev *netdev, long long int interval)
1179 return (netdev->netdev_class->set_miimon_interval
1180 ? netdev->netdev_class->set_miimon_interval(netdev, interval)
1184 /* Retrieves current device stats for 'netdev'. */
1186 netdev_get_stats(const struct netdev *netdev, struct netdev_stats *stats)
1190 COVERAGE_INC(netdev_get_stats);
1191 error = (netdev->netdev_class->get_stats
1192 ? netdev->netdev_class->get_stats(netdev, stats)
1195 memset(stats, 0xff, sizeof *stats);
1200 /* Attempts to change the stats for 'netdev' to those provided in 'stats'.
1201 * Returns 0 if successful, otherwise a positive errno value.
1203 * This will probably fail for most network devices. Some devices might only
1204 * allow setting their stats to 0. */
1206 netdev_set_stats(struct netdev *netdev, const struct netdev_stats *stats)
1208 return (netdev->netdev_class->set_stats
1209 ? netdev->netdev_class->set_stats(netdev, stats)
1213 /* Attempts to set input rate limiting (policing) policy, such that up to
1214 * 'kbits_rate' kbps of traffic is accepted, with a maximum accumulative burst
1215 * size of 'kbits' kb. */
1217 netdev_set_policing(struct netdev *netdev, uint32_t kbits_rate,
1218 uint32_t kbits_burst)
1220 return (netdev->netdev_class->set_policing
1221 ? netdev->netdev_class->set_policing(netdev,
1222 kbits_rate, kbits_burst)
1226 /* Adds to 'types' all of the forms of QoS supported by 'netdev', or leaves it
1227 * empty if 'netdev' does not support QoS. Any names added to 'types' should
1228 * be documented as valid for the "type" column in the "QoS" table in
1229 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1231 * Every network device supports disabling QoS with a type of "", but this type
1232 * will not be added to 'types'.
1234 * The caller must initialize 'types' (e.g. with sset_init()) before calling
1235 * this function. The caller is responsible for destroying 'types' (e.g. with
1236 * sset_destroy()) when it is no longer needed.
1238 * Returns 0 if successful, otherwise a positive errno value. */
1240 netdev_get_qos_types(const struct netdev *netdev, struct sset *types)
1242 const struct netdev_class *class = netdev->netdev_class;
1243 return (class->get_qos_types
1244 ? class->get_qos_types(netdev, types)
1248 /* Queries 'netdev' for its capabilities regarding the specified 'type' of QoS,
1249 * which should be "" or one of the types returned by netdev_get_qos_types()
1250 * for 'netdev'. Returns 0 if successful, otherwise a positive errno value.
1251 * On success, initializes 'caps' with the QoS capabilities; on failure, clears
1252 * 'caps' to all zeros. */
1254 netdev_get_qos_capabilities(const struct netdev *netdev, const char *type,
1255 struct netdev_qos_capabilities *caps)
1257 const struct netdev_class *class = netdev->netdev_class;
1260 int retval = (class->get_qos_capabilities
1261 ? class->get_qos_capabilities(netdev, type, caps)
1264 memset(caps, 0, sizeof *caps);
1268 /* Every netdev supports turning off QoS. */
1269 memset(caps, 0, sizeof *caps);
1274 /* Obtains the number of queues supported by 'netdev' for the specified 'type'
1275 * of QoS. Returns 0 if successful, otherwise a positive errno value. Stores
1276 * the number of queues (zero on failure) in '*n_queuesp'.
1278 * This is just a simple wrapper around netdev_get_qos_capabilities(). */
1280 netdev_get_n_queues(const struct netdev *netdev,
1281 const char *type, unsigned int *n_queuesp)
1283 struct netdev_qos_capabilities caps;
1286 retval = netdev_get_qos_capabilities(netdev, type, &caps);
1287 *n_queuesp = caps.n_queues;
1291 /* Queries 'netdev' about its currently configured form of QoS. If successful,
1292 * stores the name of the current form of QoS into '*typep', stores any details
1293 * of configuration as string key-value pairs in 'details', and returns 0. On
1294 * failure, sets '*typep' to NULL and returns a positive errno value.
1296 * A '*typep' of "" indicates that QoS is currently disabled on 'netdev'.
1298 * The caller must initialize 'details' as an empty smap (e.g. with
1299 * smap_init()) before calling this function. The caller must free 'details'
1300 * when it is no longer needed (e.g. with smap_destroy()).
1302 * The caller must not modify or free '*typep'.
1304 * '*typep' will be one of the types returned by netdev_get_qos_types() for
1305 * 'netdev'. The contents of 'details' should be documented as valid for
1306 * '*typep' in the "other_config" column in the "QoS" table in
1307 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)). */
1309 netdev_get_qos(const struct netdev *netdev,
1310 const char **typep, struct smap *details)
1312 const struct netdev_class *class = netdev->netdev_class;
1315 if (class->get_qos) {
1316 retval = class->get_qos(netdev, typep, details);
1319 smap_clear(details);
1323 /* 'netdev' doesn't support QoS, so report that QoS is disabled. */
1329 /* Attempts to reconfigure QoS on 'netdev', changing the form of QoS to 'type'
1330 * with details of configuration from 'details'. Returns 0 if successful,
1331 * otherwise a positive errno value. On error, the previous QoS configuration
1334 * When this function changes the type of QoS (not just 'details'), this also
1335 * resets all queue configuration for 'netdev' to their defaults (which depend
1336 * on the specific type of QoS). Otherwise, the queue configuration for
1337 * 'netdev' is unchanged.
1339 * 'type' should be "" (to disable QoS) or one of the types returned by
1340 * netdev_get_qos_types() for 'netdev'. The contents of 'details' should be
1341 * documented as valid for the given 'type' in the "other_config" column in the
1342 * "QoS" table in vswitchd/vswitch.xml (which is built as
1343 * ovs-vswitchd.conf.db(8)).
1345 * NULL may be specified for 'details' if there are no configuration
1348 netdev_set_qos(struct netdev *netdev,
1349 const char *type, const struct smap *details)
1351 const struct netdev_class *class = netdev->netdev_class;
1357 if (class->set_qos) {
1359 static const struct smap empty = SMAP_INITIALIZER(&empty);
1362 return class->set_qos(netdev, type, details);
1364 return *type ? EOPNOTSUPP : 0;
1368 /* Queries 'netdev' for information about the queue numbered 'queue_id'. If
1369 * successful, adds that information as string key-value pairs to 'details'.
1370 * Returns 0 if successful, otherwise a positive errno value.
1372 * 'queue_id' must be less than the number of queues supported by 'netdev' for
1373 * the current form of QoS (e.g. as returned by netdev_get_n_queues(netdev)).
1375 * The returned contents of 'details' should be documented as valid for the
1376 * given 'type' in the "other_config" column in the "Queue" table in
1377 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1379 * The caller must initialize 'details' (e.g. with smap_init()) before calling
1380 * this function. The caller must free 'details' when it is no longer needed
1381 * (e.g. with smap_destroy()). */
1383 netdev_get_queue(const struct netdev *netdev,
1384 unsigned int queue_id, struct smap *details)
1386 const struct netdev_class *class = netdev->netdev_class;
1389 retval = (class->get_queue
1390 ? class->get_queue(netdev, queue_id, details)
1393 smap_clear(details);
1398 /* Configures the queue numbered 'queue_id' on 'netdev' with the key-value
1399 * string pairs in 'details'. The contents of 'details' should be documented
1400 * as valid for the given 'type' in the "other_config" column in the "Queue"
1401 * table in vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1402 * Returns 0 if successful, otherwise a positive errno value. On failure, the
1403 * given queue's configuration should be unmodified.
1405 * 'queue_id' must be less than the number of queues supported by 'netdev' for
1406 * the current form of QoS (e.g. as returned by netdev_get_n_queues(netdev)).
1408 * This function does not modify 'details', and the caller retains ownership of
1411 netdev_set_queue(struct netdev *netdev,
1412 unsigned int queue_id, const struct smap *details)
1414 const struct netdev_class *class = netdev->netdev_class;
1415 return (class->set_queue
1416 ? class->set_queue(netdev, queue_id, details)
1420 /* Attempts to delete the queue numbered 'queue_id' from 'netdev'. Some kinds
1421 * of QoS may have a fixed set of queues, in which case attempts to delete them
1422 * will fail with EOPNOTSUPP.
1424 * Returns 0 if successful, otherwise a positive errno value. On failure, the
1425 * given queue will be unmodified.
1427 * 'queue_id' must be less than the number of queues supported by 'netdev' for
1428 * the current form of QoS (e.g. as returned by
1429 * netdev_get_n_queues(netdev)). */
1431 netdev_delete_queue(struct netdev *netdev, unsigned int queue_id)
1433 const struct netdev_class *class = netdev->netdev_class;
1434 return (class->delete_queue
1435 ? class->delete_queue(netdev, queue_id)
1439 /* Obtains statistics about 'queue_id' on 'netdev'. On success, returns 0 and
1440 * fills 'stats' with the queue's statistics; individual members of 'stats' may
1441 * be set to all-1-bits if the statistic is unavailable. On failure, returns a
1442 * positive errno value and fills 'stats' with values indicating unsupported
1445 netdev_get_queue_stats(const struct netdev *netdev, unsigned int queue_id,
1446 struct netdev_queue_stats *stats)
1448 const struct netdev_class *class = netdev->netdev_class;
1451 retval = (class->get_queue_stats
1452 ? class->get_queue_stats(netdev, queue_id, stats)
1455 stats->tx_bytes = UINT64_MAX;
1456 stats->tx_packets = UINT64_MAX;
1457 stats->tx_errors = UINT64_MAX;
1458 stats->created = LLONG_MIN;
1463 /* Initializes 'dump' to begin dumping the queues in a netdev.
1465 * This function provides no status indication. An error status for the entire
1466 * dump operation is provided when it is completed by calling
1467 * netdev_queue_dump_done().
1470 netdev_queue_dump_start(struct netdev_queue_dump *dump,
1471 const struct netdev *netdev)
1473 dump->netdev = netdev_ref(netdev);
1474 if (netdev->netdev_class->queue_dump_start) {
1475 dump->error = netdev->netdev_class->queue_dump_start(netdev,
1478 dump->error = EOPNOTSUPP;
1482 /* Attempts to retrieve another queue from 'dump', which must have been
1483 * initialized with netdev_queue_dump_start(). On success, stores a new queue
1484 * ID into '*queue_id', fills 'details' with configuration details for the
1485 * queue, and returns true. On failure, returns false.
1487 * Queues are not necessarily dumped in increasing order of queue ID (or any
1488 * other predictable order).
1490 * Failure might indicate an actual error or merely that the last queue has
1491 * been dumped. An error status for the entire dump operation is provided when
1492 * it is completed by calling netdev_queue_dump_done().
1494 * The returned contents of 'details' should be documented as valid for the
1495 * given 'type' in the "other_config" column in the "Queue" table in
1496 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1498 * The caller must initialize 'details' (e.g. with smap_init()) before calling
1499 * this function. This function will clear and replace its contents. The
1500 * caller must free 'details' when it is no longer needed (e.g. with
1501 * smap_destroy()). */
1503 netdev_queue_dump_next(struct netdev_queue_dump *dump,
1504 unsigned int *queue_id, struct smap *details)
1506 const struct netdev *netdev = dump->netdev;
1512 dump->error = netdev->netdev_class->queue_dump_next(netdev, dump->state,
1516 netdev->netdev_class->queue_dump_done(netdev, dump->state);
1522 /* Completes queue table dump operation 'dump', which must have been
1523 * initialized with netdev_queue_dump_start(). Returns 0 if the dump operation
1524 * was error-free, otherwise a positive errno value describing the problem. */
1526 netdev_queue_dump_done(struct netdev_queue_dump *dump)
1528 const struct netdev *netdev = dump->netdev;
1529 if (!dump->error && netdev->netdev_class->queue_dump_done) {
1530 dump->error = netdev->netdev_class->queue_dump_done(netdev,
1533 netdev_close(dump->netdev);
1534 return dump->error == EOF ? 0 : dump->error;
1537 /* Iterates over all of 'netdev''s queues, calling 'cb' with the queue's ID,
1538 * its statistics, and the 'aux' specified by the caller. The order of
1539 * iteration is unspecified, but (when successful) each queue is visited
1542 * Calling this function may be more efficient than calling
1543 * netdev_get_queue_stats() for every queue.
1545 * 'cb' must not modify or free the statistics passed in.
1547 * Returns 0 if successful, otherwise a positive errno value. On error, some
1548 * configured queues may not have been included in the iteration. */
1550 netdev_dump_queue_stats(const struct netdev *netdev,
1551 netdev_dump_queue_stats_cb *cb, void *aux)
1553 const struct netdev_class *class = netdev->netdev_class;
1554 return (class->dump_queue_stats
1555 ? class->dump_queue_stats(netdev, cb, aux)
1560 /* Returns the class type of 'netdev'.
1562 * The caller must not free the returned value. */
1564 netdev_get_type(const struct netdev *netdev)
1566 return netdev->netdev_class->type;
1569 /* Returns the class associated with 'netdev'. */
1570 const struct netdev_class *
1571 netdev_get_class(const struct netdev *netdev)
1573 return netdev->netdev_class;
1576 /* Returns the netdev with 'name' or NULL if there is none.
1578 * The caller must free the returned netdev with netdev_close(). */
1580 netdev_from_name(const char *name)
1581 OVS_EXCLUDED(netdev_mutex)
1583 struct netdev *netdev;
1585 ovs_mutex_lock(&netdev_mutex);
1586 netdev = shash_find_data(&netdev_shash, name);
1590 ovs_mutex_unlock(&netdev_mutex);
1595 /* Fills 'device_list' with devices that match 'netdev_class'.
1597 * The caller is responsible for initializing and destroying 'device_list' and
1598 * must close each device on the list. */
1600 netdev_get_devices(const struct netdev_class *netdev_class,
1601 struct shash *device_list)
1602 OVS_EXCLUDED(netdev_mutex)
1604 struct shash_node *node;
1606 ovs_mutex_lock(&netdev_mutex);
1607 SHASH_FOR_EACH (node, &netdev_shash) {
1608 struct netdev *dev = node->data;
1610 if (dev->netdev_class == netdev_class) {
1612 shash_add(device_list, node->name, node->data);
1615 ovs_mutex_unlock(&netdev_mutex);
1618 /* Extracts pointers to all 'netdev-vports' into an array 'vports'
1619 * and returns it. Stores the size of the array into '*size'.
1621 * The caller is responsible for freeing 'vports' and must close
1622 * each 'netdev-vport' in the list. */
1624 netdev_get_vports(size_t *size)
1625 OVS_EXCLUDED(netdev_mutex)
1627 struct netdev **vports;
1628 struct shash_node *node;
1635 /* Explicitly allocates big enough chunk of memory. */
1636 vports = xmalloc(shash_count(&netdev_shash) * sizeof *vports);
1637 ovs_mutex_lock(&netdev_mutex);
1638 SHASH_FOR_EACH (node, &netdev_shash) {
1639 struct netdev *dev = node->data;
1641 if (netdev_vport_is_vport_class(dev->netdev_class)) {
1647 ovs_mutex_unlock(&netdev_mutex);
1654 netdev_get_type_from_name(const char *name)
1656 struct netdev *dev = netdev_from_name(name);
1657 const char *type = dev ? netdev_get_type(dev) : NULL;
1663 netdev_rxq_get_netdev(const struct netdev_rxq *rx)
1665 ovs_assert(rx->netdev->ref_cnt > 0);
1670 netdev_rxq_get_name(const struct netdev_rxq *rx)
1672 return netdev_get_name(netdev_rxq_get_netdev(rx));
1676 restore_all_flags(void *aux OVS_UNUSED)
1678 struct shash_node *node;
1680 SHASH_FOR_EACH (node, &netdev_shash) {
1681 struct netdev *netdev = node->data;
1682 const struct netdev_saved_flags *sf;
1683 enum netdev_flags saved_values;
1684 enum netdev_flags saved_flags;
1686 saved_values = saved_flags = 0;
1687 LIST_FOR_EACH (sf, node, &netdev->saved_flags_list) {
1688 saved_flags |= sf->saved_flags;
1689 saved_values &= ~sf->saved_flags;
1690 saved_values |= sf->saved_flags & sf->saved_values;
1693 enum netdev_flags old_flags;
1695 netdev->netdev_class->update_flags(netdev,
1696 saved_flags & saved_values,
1697 saved_flags & ~saved_values,
1704 netdev_get_change_seq(const struct netdev *netdev)
1706 return netdev->change_seq;