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 /* In 'netdev_classes', by class->type. */
81 struct hmap_node hmap_node OVS_GUARDED_BY(netdev_class_mutex);
82 const struct netdev_class *class OVS_GUARDED_BY(netdev_class_mutex);
83 /* Number of 'struct netdev's of this class. */
84 int ref_cnt OVS_GUARDED_BY(netdev_class_mutex);
87 /* This is set pretty low because we probably won't learn anything from the
88 * additional log messages. */
89 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
91 static void restore_all_flags(void *aux OVS_UNUSED);
92 void update_device_args(struct netdev *, const struct shash *args);
95 netdev_n_rxq(const struct netdev *netdev)
101 netdev_is_pmd(const struct netdev *netdev)
103 return (!strcmp(netdev->netdev_class->type, "dpdk") ||
104 !strcmp(netdev->netdev_class->type, "dpdkr"));
108 netdev_class_mutex_initialize(void)
109 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
111 static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
113 if (ovsthread_once_start(&once)) {
114 ovs_mutex_init_recursive(&netdev_class_mutex);
115 ovsthread_once_done(&once);
120 netdev_initialize(void)
121 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
123 static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
125 if (ovsthread_once_start(&once)) {
126 netdev_class_mutex_initialize();
128 fatal_signal_add_hook(restore_all_flags, NULL, NULL, true);
129 netdev_vport_patch_register();
132 netdev_register_provider(&netdev_linux_class);
133 netdev_register_provider(&netdev_internal_class);
134 netdev_register_provider(&netdev_tap_class);
135 netdev_vport_tunnel_register();
137 #if defined(__FreeBSD__) || defined(__NetBSD__)
138 netdev_register_provider(&netdev_tap_class);
139 netdev_register_provider(&netdev_bsd_class);
141 netdev_dpdk_register();
143 ovsthread_once_done(&once);
147 /* Performs periodic work needed by all the various kinds of netdevs.
149 * If your program opens any netdevs, it must call this function within its
153 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
155 struct netdev_registered_class *rc;
158 ovs_mutex_lock(&netdev_class_mutex);
159 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
160 if (rc->class->run) {
164 ovs_mutex_unlock(&netdev_class_mutex);
167 /* Arranges for poll_block() to wake up when netdev_run() needs to be called.
169 * If your program opens any netdevs, it must call this function within its
173 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
175 struct netdev_registered_class *rc;
177 ovs_mutex_lock(&netdev_class_mutex);
178 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
179 if (rc->class->wait) {
183 ovs_mutex_unlock(&netdev_class_mutex);
186 static struct netdev_registered_class *
187 netdev_lookup_class(const char *type)
188 OVS_REQ_RDLOCK(netdev_class_mutex)
190 struct netdev_registered_class *rc;
192 HMAP_FOR_EACH_WITH_HASH (rc, hmap_node, hash_string(type, 0),
194 if (!strcmp(type, rc->class->type)) {
201 /* Initializes and registers a new netdev provider. After successful
202 * registration, new netdevs of that type can be opened using netdev_open(). */
204 netdev_register_provider(const struct netdev_class *new_class)
205 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
209 netdev_class_mutex_initialize();
210 ovs_mutex_lock(&netdev_class_mutex);
211 if (netdev_lookup_class(new_class->type)) {
212 VLOG_WARN("attempted to register duplicate netdev provider: %s",
216 error = new_class->init ? new_class->init() : 0;
218 struct netdev_registered_class *rc;
220 rc = xmalloc(sizeof *rc);
221 hmap_insert(&netdev_classes, &rc->hmap_node,
222 hash_string(new_class->type, 0));
223 rc->class = new_class;
226 VLOG_ERR("failed to initialize %s network device class: %s",
227 new_class->type, ovs_strerror(error));
230 ovs_mutex_unlock(&netdev_class_mutex);
235 /* Unregisters a netdev provider. 'type' must have been previously
236 * registered and not currently be in use by any netdevs. After unregistration
237 * new netdevs of that type cannot be opened using netdev_open(). */
239 netdev_unregister_provider(const char *type)
240 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
242 struct netdev_registered_class *rc;
245 ovs_mutex_lock(&netdev_class_mutex);
246 rc = netdev_lookup_class(type);
248 VLOG_WARN("attempted to unregister a netdev provider that is not "
249 "registered: %s", type);
250 error = EAFNOSUPPORT;
253 hmap_remove(&netdev_classes, &rc->hmap_node);
257 VLOG_WARN("attempted to unregister in use netdev provider: %s",
262 ovs_mutex_unlock(&netdev_class_mutex);
267 /* Clears 'types' and enumerates the types of all currently registered netdev
268 * providers into it. The caller must first initialize the sset. */
270 netdev_enumerate_types(struct sset *types)
271 OVS_EXCLUDED(netdev_mutex)
273 struct netdev_registered_class *rc;
278 ovs_mutex_lock(&netdev_class_mutex);
279 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
280 sset_add(types, rc->class->type);
282 ovs_mutex_unlock(&netdev_class_mutex);
285 /* Check that the network device name is not the same as any of the registered
286 * vport providers' dpif_port name (dpif_port is NULL if the vport provider
287 * does not define it) or the datapath internal port name (e.g. ovs-system).
289 * Returns true if there is a name conflict, false otherwise. */
291 netdev_is_reserved_name(const char *name)
292 OVS_EXCLUDED(netdev_mutex)
294 struct netdev_registered_class *rc;
298 ovs_mutex_lock(&netdev_class_mutex);
299 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
300 const char *dpif_port = netdev_vport_class_get_dpif_port(rc->class);
301 if (dpif_port && !strncmp(name, dpif_port, strlen(dpif_port))) {
302 ovs_mutex_unlock(&netdev_class_mutex);
306 ovs_mutex_unlock(&netdev_class_mutex);
308 if (!strncmp(name, "ovs-", 4)) {
313 dp_enumerate_types(&types);
314 SSET_FOR_EACH (type, &types) {
315 if (!strcmp(name+4, type)) {
316 sset_destroy(&types);
320 sset_destroy(&types);
326 /* Opens the network device named 'name' (e.g. "eth0") of the specified 'type'
327 * (e.g. "system") and returns zero if successful, otherwise a positive errno
328 * value. On success, sets '*netdevp' to the new network device, otherwise to
331 * Some network devices may need to be configured (with netdev_set_config())
332 * before they can be used. */
334 netdev_open(const char *name, const char *type, struct netdev **netdevp)
335 OVS_EXCLUDED(netdev_mutex)
337 struct netdev *netdev;
342 ovs_mutex_lock(&netdev_class_mutex);
343 ovs_mutex_lock(&netdev_mutex);
344 netdev = shash_find_data(&netdev_shash, name);
346 struct netdev_registered_class *rc;
348 rc = netdev_lookup_class(type && type[0] ? type : "system");
350 netdev = rc->class->alloc();
352 memset(netdev, 0, sizeof *netdev);
353 netdev->netdev_class = rc->class;
354 netdev->name = xstrdup(name);
355 netdev->change_seq = 1;
356 netdev->node = shash_add(&netdev_shash, name, netdev);
358 /* By default enable one rx queue per netdev. */
359 if (netdev->netdev_class->rxq_alloc) {
364 list_init(&netdev->saved_flags_list);
366 error = rc->class->construct(netdev);
369 netdev_change_seq_changed(netdev);
372 ovs_assert(list_is_empty(&netdev->saved_flags_list));
373 shash_delete(&netdev_shash, netdev->node);
374 rc->class->dealloc(netdev);
380 VLOG_WARN("could not create netdev %s of unknown type %s",
382 error = EAFNOSUPPORT;
394 ovs_mutex_unlock(&netdev_mutex);
395 ovs_mutex_unlock(&netdev_class_mutex);
400 /* Returns a reference to 'netdev_' for the caller to own. Returns null if
401 * 'netdev_' is null. */
403 netdev_ref(const struct netdev *netdev_)
404 OVS_EXCLUDED(netdev_mutex)
406 struct netdev *netdev = CONST_CAST(struct netdev *, netdev_);
409 ovs_mutex_lock(&netdev_mutex);
410 ovs_assert(netdev->ref_cnt > 0);
412 ovs_mutex_unlock(&netdev_mutex);
417 /* Reconfigures the device 'netdev' with 'args'. 'args' may be empty
418 * or NULL if none are needed. */
420 netdev_set_config(struct netdev *netdev, const struct smap *args, char **errp)
421 OVS_EXCLUDED(netdev_mutex)
423 if (netdev->netdev_class->set_config) {
424 const struct smap no_args = SMAP_INITIALIZER(&no_args);
427 error = netdev->netdev_class->set_config(netdev,
428 args ? args : &no_args);
430 VLOG_WARN_BUF(errp, "%s: could not set configuration (%s)",
431 netdev_get_name(netdev), ovs_strerror(error));
434 } else if (args && !smap_is_empty(args)) {
435 VLOG_WARN_BUF(errp, "%s: arguments provided to device that is not configurable",
436 netdev_get_name(netdev));
441 /* Returns the current configuration for 'netdev' in 'args'. The caller must
442 * have already initialized 'args' with smap_init(). Returns 0 on success, in
443 * which case 'args' will be filled with 'netdev''s configuration. On failure
444 * returns a positive errno value, in which case 'args' will be empty.
446 * The caller owns 'args' and its contents and must eventually free them with
449 netdev_get_config(const struct netdev *netdev, struct smap *args)
450 OVS_EXCLUDED(netdev_mutex)
455 if (netdev->netdev_class->get_config) {
456 error = netdev->netdev_class->get_config(netdev, args);
467 const struct netdev_tunnel_config *
468 netdev_get_tunnel_config(const struct netdev *netdev)
469 OVS_EXCLUDED(netdev_mutex)
471 if (netdev->netdev_class->get_tunnel_config) {
472 return netdev->netdev_class->get_tunnel_config(netdev);
479 netdev_unref(struct netdev *dev)
480 OVS_RELEASES(netdev_mutex)
482 ovs_assert(dev->ref_cnt);
483 if (!--dev->ref_cnt) {
484 const struct netdev_class *class = dev->netdev_class;
485 struct netdev_registered_class *rc;
487 dev->netdev_class->destruct(dev);
490 shash_delete(&netdev_shash, dev->node);
493 dev->netdev_class->dealloc(dev);
494 ovs_mutex_unlock(&netdev_mutex);
496 ovs_mutex_lock(&netdev_class_mutex);
497 rc = netdev_lookup_class(class->type);
498 ovs_assert(rc->ref_cnt > 0);
500 ovs_mutex_unlock(&netdev_class_mutex);
502 ovs_mutex_unlock(&netdev_mutex);
506 /* Closes and destroys 'netdev'. */
508 netdev_close(struct netdev *netdev)
509 OVS_EXCLUDED(netdev_mutex)
512 ovs_mutex_lock(&netdev_mutex);
513 netdev_unref(netdev);
517 /* Removes 'netdev' from the global shash and unrefs 'netdev'.
519 * This allows handler and revalidator threads to still retain references
520 * to this netdev while the main thread changes interface configuration.
522 * This function should only be called by the main thread when closing
523 * netdevs during user configuration changes. Otherwise, netdev_close should be
524 * used to close netdevs. */
526 netdev_remove(struct netdev *netdev)
529 ovs_mutex_lock(&netdev_mutex);
531 shash_delete(&netdev_shash, netdev->node);
533 netdev_change_seq_changed(netdev);
535 netdev_unref(netdev);
539 /* Parses 'netdev_name_', which is of the form [type@]name into its component
540 * pieces. 'name' and 'type' must be freed by the caller. */
542 netdev_parse_name(const char *netdev_name_, char **name, char **type)
544 char *netdev_name = xstrdup(netdev_name_);
547 separator = strchr(netdev_name, '@');
551 *name = xstrdup(separator + 1);
554 *type = xstrdup("system");
558 /* Attempts to open a netdev_rxq handle for obtaining packets received on
559 * 'netdev'. On success, returns 0 and stores a nonnull 'netdev_rxq *' into
560 * '*rxp'. On failure, returns a positive errno value and stores NULL into
563 * Some kinds of network devices might not support receiving packets. This
564 * function returns EOPNOTSUPP in that case.*/
566 netdev_rxq_open(struct netdev *netdev, struct netdev_rxq **rxp, int id)
567 OVS_EXCLUDED(netdev_mutex)
571 if (netdev->netdev_class->rxq_alloc && id < netdev->n_rxq) {
572 struct netdev_rxq *rx = netdev->netdev_class->rxq_alloc();
576 error = netdev->netdev_class->rxq_construct(rx);
582 netdev->netdev_class->rxq_dealloc(rx);
596 netdev_rxq_close(struct netdev_rxq *rx)
597 OVS_EXCLUDED(netdev_mutex)
600 struct netdev *netdev = rx->netdev;
601 netdev->netdev_class->rxq_destruct(rx);
602 netdev->netdev_class->rxq_dealloc(rx);
603 netdev_close(netdev);
607 /* Attempts to receive batch of packets from 'rx'.
609 * Returns EAGAIN immediately if no packet is ready to be received.
611 * Returns EMSGSIZE, and discards the packet, if the received packet is longer
612 * than 'ofpbuf_tailroom(buffer)'.
614 * It is advised that the tailroom of 'buffer' should be
615 * VLAN_HEADER_LEN bytes longer than the MTU to allow space for an
616 * out-of-band VLAN header to be added to the packet. At the very least,
617 * 'buffer' must have at least ETH_TOTAL_MIN bytes of tailroom.
619 * This function may be set to null if it would always return EOPNOTSUPP
622 netdev_rxq_recv(struct netdev_rxq *rx, struct dpif_packet **buffers, int *cnt)
626 retval = rx->netdev->netdev_class->rxq_recv(rx, buffers, cnt);
628 COVERAGE_INC(netdev_received);
633 /* Arranges for poll_block() to wake up when a packet is ready to be received
636 netdev_rxq_wait(struct netdev_rxq *rx)
638 rx->netdev->netdev_class->rxq_wait(rx);
641 /* Discards any packets ready to be received on 'rx'. */
643 netdev_rxq_drain(struct netdev_rxq *rx)
645 return (rx->netdev->netdev_class->rxq_drain
646 ? rx->netdev->netdev_class->rxq_drain(rx)
650 /* Sends 'buffers' on 'netdev'. Returns 0 if successful (for every packet),
651 * otherwise a positive errno value. Returns EAGAIN without blocking if
652 * at least one the packets cannot be queued immediately. Returns EMSGSIZE
653 * if a partial packet was transmitted or if a packet is too big or too small
654 * to transmit on the device.
656 * If the function returns a non-zero value, some of the packets might have
659 * To retain ownership of 'buffer' caller can set may_steal to false.
661 * The kernel maintains a packet transmission queue, so the caller is not
662 * expected to do additional queuing of packets.
664 * Some network devices may not implement support for this function. In such
665 * cases this function will always return EOPNOTSUPP. */
667 netdev_send(struct netdev *netdev, struct dpif_packet **buffers, int cnt,
672 error = (netdev->netdev_class->send
673 ? netdev->netdev_class->send(netdev, buffers, cnt, may_steal)
676 COVERAGE_INC(netdev_sent);
681 /* Registers with the poll loop to wake up from the next call to poll_block()
682 * when the packet transmission queue has sufficient room to transmit a packet
683 * with netdev_send().
685 * The kernel maintains a packet transmission queue, so the client is not
686 * expected to do additional queuing of packets. Thus, this function is
687 * unlikely to ever be used. It is included for completeness. */
689 netdev_send_wait(struct netdev *netdev)
691 if (netdev->netdev_class->send_wait) {
692 netdev->netdev_class->send_wait(netdev);
696 /* Attempts to set 'netdev''s MAC address to 'mac'. Returns 0 if successful,
697 * otherwise a positive errno value. */
699 netdev_set_etheraddr(struct netdev *netdev, const uint8_t mac[ETH_ADDR_LEN])
701 return netdev->netdev_class->set_etheraddr(netdev, mac);
704 /* Retrieves 'netdev''s MAC address. If successful, returns 0 and copies the
705 * the MAC address into 'mac'. On failure, returns a positive errno value and
706 * clears 'mac' to all-zeros. */
708 netdev_get_etheraddr(const struct netdev *netdev, uint8_t mac[ETH_ADDR_LEN])
710 return netdev->netdev_class->get_etheraddr(netdev, mac);
713 /* Returns the name of the network device that 'netdev' represents,
714 * e.g. "eth0". The caller must not modify or free the returned string. */
716 netdev_get_name(const struct netdev *netdev)
721 /* Retrieves the MTU of 'netdev'. The MTU is the maximum size of transmitted
722 * (and received) packets, in bytes, not including the hardware header; thus,
723 * this is typically 1500 bytes for Ethernet devices.
725 * If successful, returns 0 and stores the MTU size in '*mtup'. Returns
726 * EOPNOTSUPP if 'netdev' does not have an MTU (as e.g. some tunnels do not).
727 * On other failure, returns a positive errno value. On failure, sets '*mtup'
730 netdev_get_mtu(const struct netdev *netdev, int *mtup)
732 const struct netdev_class *class = netdev->netdev_class;
735 error = class->get_mtu ? class->get_mtu(netdev, mtup) : EOPNOTSUPP;
738 if (error != EOPNOTSUPP) {
739 VLOG_DBG_RL(&rl, "failed to retrieve MTU for network device %s: "
740 "%s", netdev_get_name(netdev), ovs_strerror(error));
746 /* Sets the MTU of 'netdev'. The MTU is the maximum size of transmitted
747 * (and received) packets, in bytes.
749 * If successful, returns 0. Returns EOPNOTSUPP if 'netdev' does not have an
750 * MTU (as e.g. some tunnels do not). On other failure, returns a positive
753 netdev_set_mtu(const struct netdev *netdev, int mtu)
755 const struct netdev_class *class = netdev->netdev_class;
758 error = class->set_mtu ? class->set_mtu(netdev, mtu) : EOPNOTSUPP;
759 if (error && error != EOPNOTSUPP) {
760 VLOG_DBG_RL(&rl, "failed to set MTU for network device %s: %s",
761 netdev_get_name(netdev), ovs_strerror(error));
767 /* Returns the ifindex of 'netdev', if successful, as a positive number. On
768 * failure, returns a negative errno value.
770 * The desired semantics of the ifindex value are a combination of those
771 * specified by POSIX for if_nametoindex() and by SNMP for ifIndex. An ifindex
772 * value should be unique within a host and remain stable at least until
773 * reboot. SNMP says an ifindex "ranges between 1 and the value of ifNumber"
774 * but many systems do not follow this rule anyhow.
776 * Some network devices may not implement support for this function. In such
777 * cases this function will always return -EOPNOTSUPP.
780 netdev_get_ifindex(const struct netdev *netdev)
782 int (*get_ifindex)(const struct netdev *);
784 get_ifindex = netdev->netdev_class->get_ifindex;
786 return get_ifindex ? get_ifindex(netdev) : -EOPNOTSUPP;
789 /* Stores the features supported by 'netdev' into each of '*current',
790 * '*advertised', '*supported', and '*peer' that are non-null. Each value is a
791 * bitmap of "enum ofp_port_features" bits, in host byte order. Returns 0 if
792 * successful, otherwise a positive errno value. On failure, all of the
793 * passed-in values are set to 0.
795 * Some network devices may not implement support for this function. In such
796 * cases this function will always return EOPNOTSUPP. */
798 netdev_get_features(const struct netdev *netdev,
799 enum netdev_features *current,
800 enum netdev_features *advertised,
801 enum netdev_features *supported,
802 enum netdev_features *peer)
804 int (*get_features)(const struct netdev *netdev,
805 enum netdev_features *current,
806 enum netdev_features *advertised,
807 enum netdev_features *supported,
808 enum netdev_features *peer);
809 enum netdev_features dummy[4];
816 advertised = &dummy[1];
819 supported = &dummy[2];
825 get_features = netdev->netdev_class->get_features;
827 ? get_features(netdev, current, advertised, supported,
831 *current = *advertised = *supported = *peer = 0;
836 /* Returns the maximum speed of a network connection that has the NETDEV_F_*
837 * bits in 'features', in bits per second. If no bits that indicate a speed
838 * are set in 'features', returns 'default_bps'. */
840 netdev_features_to_bps(enum netdev_features features,
841 uint64_t default_bps)
844 F_1000000MB = NETDEV_F_1TB_FD,
845 F_100000MB = NETDEV_F_100GB_FD,
846 F_40000MB = NETDEV_F_40GB_FD,
847 F_10000MB = NETDEV_F_10GB_FD,
848 F_1000MB = NETDEV_F_1GB_HD | NETDEV_F_1GB_FD,
849 F_100MB = NETDEV_F_100MB_HD | NETDEV_F_100MB_FD,
850 F_10MB = NETDEV_F_10MB_HD | NETDEV_F_10MB_FD
853 return ( features & F_1000000MB ? UINT64_C(1000000000000)
854 : features & F_100000MB ? UINT64_C(100000000000)
855 : features & F_40000MB ? UINT64_C(40000000000)
856 : features & F_10000MB ? UINT64_C(10000000000)
857 : features & F_1000MB ? UINT64_C(1000000000)
858 : features & F_100MB ? UINT64_C(100000000)
859 : features & F_10MB ? UINT64_C(10000000)
863 /* Returns true if any of the NETDEV_F_* bits that indicate a full-duplex link
864 * are set in 'features', otherwise false. */
866 netdev_features_is_full_duplex(enum netdev_features features)
868 return (features & (NETDEV_F_10MB_FD | NETDEV_F_100MB_FD | NETDEV_F_1GB_FD
869 | NETDEV_F_10GB_FD | NETDEV_F_40GB_FD
870 | NETDEV_F_100GB_FD | NETDEV_F_1TB_FD)) != 0;
873 /* Set the features advertised by 'netdev' to 'advertise'. Returns 0 if
874 * successful, otherwise a positive errno value. */
876 netdev_set_advertisements(struct netdev *netdev,
877 enum netdev_features advertise)
879 return (netdev->netdev_class->set_advertisements
880 ? netdev->netdev_class->set_advertisements(
885 /* If 'netdev' has an assigned IPv4 address, sets '*address' to that address
886 * and '*netmask' to its netmask and returns 0. Otherwise, returns a positive
887 * errno value and sets '*address' to 0 (INADDR_ANY).
889 * The following error values have well-defined meanings:
891 * - EADDRNOTAVAIL: 'netdev' has no assigned IPv4 address.
893 * - EOPNOTSUPP: No IPv4 network stack attached to 'netdev'.
895 * 'address' or 'netmask' or both may be null, in which case the address or
896 * netmask is not reported. */
898 netdev_get_in4(const struct netdev *netdev,
899 struct in_addr *address_, struct in_addr *netmask_)
901 struct in_addr address;
902 struct in_addr netmask;
905 error = (netdev->netdev_class->get_in4
906 ? netdev->netdev_class->get_in4(netdev,
910 address_->s_addr = error ? 0 : address.s_addr;
913 netmask_->s_addr = error ? 0 : netmask.s_addr;
918 /* Assigns 'addr' as 'netdev''s IPv4 address and 'mask' as its netmask. If
919 * 'addr' is INADDR_ANY, 'netdev''s IPv4 address is cleared. Returns a
920 * positive errno value. */
922 netdev_set_in4(struct netdev *netdev, struct in_addr addr, struct in_addr mask)
924 return (netdev->netdev_class->set_in4
925 ? netdev->netdev_class->set_in4(netdev, addr, mask)
929 /* Obtains ad IPv4 address from device name and save the address in
930 * in4. Returns 0 if successful, otherwise a positive errno value.
933 netdev_get_in4_by_name(const char *device_name, struct in_addr *in4)
935 struct netdev *netdev;
938 error = netdev_open(device_name, "system", &netdev);
940 in4->s_addr = htonl(0);
944 error = netdev_get_in4(netdev, in4, NULL);
945 netdev_close(netdev);
949 /* Adds 'router' as a default IP gateway for the TCP/IP stack that corresponds
952 netdev_add_router(struct netdev *netdev, struct in_addr router)
954 COVERAGE_INC(netdev_add_router);
955 return (netdev->netdev_class->add_router
956 ? netdev->netdev_class->add_router(netdev, router)
960 /* Looks up the next hop for 'host' for the TCP/IP stack that corresponds to
961 * 'netdev'. If a route cannot not be determined, sets '*next_hop' to 0,
962 * '*netdev_name' to null, and returns a positive errno value. Otherwise, if a
963 * next hop is found, stores the next hop gateway's address (0 if 'host' is on
964 * a directly connected network) in '*next_hop' and a copy of the name of the
965 * device to reach 'host' in '*netdev_name', and returns 0. The caller is
966 * responsible for freeing '*netdev_name' (by calling free()). */
968 netdev_get_next_hop(const struct netdev *netdev,
969 const struct in_addr *host, struct in_addr *next_hop,
972 int error = (netdev->netdev_class->get_next_hop
973 ? netdev->netdev_class->get_next_hop(
974 host, next_hop, netdev_name)
977 next_hop->s_addr = 0;
983 /* Populates 'smap' with status information.
985 * Populates 'smap' with 'netdev' specific status information. This
986 * information may be used to populate the status column of the Interface table
987 * as defined in ovs-vswitchd.conf.db(5). */
989 netdev_get_status(const struct netdev *netdev, struct smap *smap)
991 return (netdev->netdev_class->get_status
992 ? netdev->netdev_class->get_status(netdev, smap)
996 /* If 'netdev' has an assigned IPv6 address, sets '*in6' to that address and
997 * returns 0. Otherwise, returns a positive errno value and sets '*in6' to
998 * all-zero-bits (in6addr_any).
1000 * The following error values have well-defined meanings:
1002 * - EADDRNOTAVAIL: 'netdev' has no assigned IPv6 address.
1004 * - EOPNOTSUPP: No IPv6 network stack attached to 'netdev'.
1006 * 'in6' may be null, in which case the address itself is not reported. */
1008 netdev_get_in6(const struct netdev *netdev, struct in6_addr *in6)
1010 struct in6_addr dummy;
1013 error = (netdev->netdev_class->get_in6
1014 ? netdev->netdev_class->get_in6(netdev,
1018 memset(in6, 0, sizeof *in6);
1023 /* On 'netdev', turns off the flags in 'off' and then turns on the flags in
1024 * 'on'. Returns 0 if successful, otherwise a positive errno value. */
1026 do_update_flags(struct netdev *netdev, enum netdev_flags off,
1027 enum netdev_flags on, enum netdev_flags *old_flagsp,
1028 struct netdev_saved_flags **sfp)
1029 OVS_EXCLUDED(netdev_mutex)
1031 struct netdev_saved_flags *sf = NULL;
1032 enum netdev_flags old_flags;
1035 error = netdev->netdev_class->update_flags(netdev, off & ~on, on,
1038 VLOG_WARN_RL(&rl, "failed to %s flags for network device %s: %s",
1039 off || on ? "set" : "get", netdev_get_name(netdev),
1040 ovs_strerror(error));
1042 } else if ((off || on) && sfp) {
1043 enum netdev_flags new_flags = (old_flags & ~off) | on;
1044 enum netdev_flags changed_flags = old_flags ^ new_flags;
1045 if (changed_flags) {
1046 ovs_mutex_lock(&netdev_mutex);
1047 *sfp = sf = xmalloc(sizeof *sf);
1048 sf->netdev = netdev;
1049 list_push_front(&netdev->saved_flags_list, &sf->node);
1050 sf->saved_flags = changed_flags;
1051 sf->saved_values = changed_flags & new_flags;
1054 ovs_mutex_unlock(&netdev_mutex);
1059 *old_flagsp = old_flags;
1068 /* Obtains the current flags for 'netdev' and stores them into '*flagsp'.
1069 * Returns 0 if successful, otherwise a positive errno value. On failure,
1070 * stores 0 into '*flagsp'. */
1072 netdev_get_flags(const struct netdev *netdev_, enum netdev_flags *flagsp)
1074 struct netdev *netdev = CONST_CAST(struct netdev *, netdev_);
1075 return do_update_flags(netdev, 0, 0, flagsp, NULL);
1078 /* Sets the flags for 'netdev' to 'flags'.
1079 * Returns 0 if successful, otherwise a positive errno value. */
1081 netdev_set_flags(struct netdev *netdev, enum netdev_flags flags,
1082 struct netdev_saved_flags **sfp)
1084 return do_update_flags(netdev, -1, flags, NULL, sfp);
1087 /* Turns on the specified 'flags' on 'netdev':
1089 * - On success, returns 0. If 'sfp' is nonnull, sets '*sfp' to a newly
1090 * allocated 'struct netdev_saved_flags *' that may be passed to
1091 * netdev_restore_flags() to restore the original values of 'flags' on
1092 * 'netdev' (this will happen automatically at program termination if
1093 * netdev_restore_flags() is never called) , or to NULL if no flags were
1096 * - On failure, returns a positive errno value. If 'sfp' is nonnull, sets
1097 * '*sfp' to NULL. */
1099 netdev_turn_flags_on(struct netdev *netdev, enum netdev_flags flags,
1100 struct netdev_saved_flags **sfp)
1102 return do_update_flags(netdev, 0, flags, NULL, sfp);
1105 /* Turns off the specified 'flags' on 'netdev'. See netdev_turn_flags_on() for
1106 * details of the interface. */
1108 netdev_turn_flags_off(struct netdev *netdev, enum netdev_flags flags,
1109 struct netdev_saved_flags **sfp)
1111 return do_update_flags(netdev, flags, 0, NULL, sfp);
1114 /* Restores the flags that were saved in 'sf', and destroys 'sf'.
1115 * Does nothing if 'sf' is NULL. */
1117 netdev_restore_flags(struct netdev_saved_flags *sf)
1118 OVS_EXCLUDED(netdev_mutex)
1121 struct netdev *netdev = sf->netdev;
1122 enum netdev_flags old_flags;
1124 netdev->netdev_class->update_flags(netdev,
1125 sf->saved_flags & sf->saved_values,
1126 sf->saved_flags & ~sf->saved_values,
1129 ovs_mutex_lock(&netdev_mutex);
1130 list_remove(&sf->node);
1132 netdev_unref(netdev);
1136 /* Looks up the ARP table entry for 'ip' on 'netdev'. If one exists and can be
1137 * successfully retrieved, it stores the corresponding MAC address in 'mac' and
1138 * returns 0. Otherwise, it returns a positive errno value; in particular,
1139 * ENXIO indicates that there is no ARP table entry for 'ip' on 'netdev'. */
1141 netdev_arp_lookup(const struct netdev *netdev,
1142 ovs_be32 ip, uint8_t mac[ETH_ADDR_LEN])
1144 int error = (netdev->netdev_class->arp_lookup
1145 ? netdev->netdev_class->arp_lookup(netdev, ip, mac)
1148 memset(mac, 0, ETH_ADDR_LEN);
1153 /* Returns true if carrier is active (link light is on) on 'netdev'. */
1155 netdev_get_carrier(const struct netdev *netdev)
1158 enum netdev_flags flags;
1161 netdev_get_flags(netdev, &flags);
1162 if (!(flags & NETDEV_UP)) {
1166 if (!netdev->netdev_class->get_carrier) {
1170 error = netdev->netdev_class->get_carrier(netdev, &carrier);
1172 VLOG_DBG("%s: failed to get network device carrier status, assuming "
1173 "down: %s", netdev_get_name(netdev), ovs_strerror(error));
1180 /* Returns the number of times 'netdev''s carrier has changed. */
1182 netdev_get_carrier_resets(const struct netdev *netdev)
1184 return (netdev->netdev_class->get_carrier_resets
1185 ? netdev->netdev_class->get_carrier_resets(netdev)
1189 /* Attempts to force netdev_get_carrier() to poll 'netdev''s MII registers for
1190 * link status instead of checking 'netdev''s carrier. 'netdev''s MII
1191 * registers will be polled once ever 'interval' milliseconds. If 'netdev'
1192 * does not support MII, another method may be used as a fallback. If
1193 * 'interval' is less than or equal to zero, reverts netdev_get_carrier() to
1194 * its normal behavior.
1196 * Returns 0 if successful, otherwise a positive errno value. */
1198 netdev_set_miimon_interval(struct netdev *netdev, long long int interval)
1200 return (netdev->netdev_class->set_miimon_interval
1201 ? netdev->netdev_class->set_miimon_interval(netdev, interval)
1205 /* Retrieves current device stats for 'netdev'. */
1207 netdev_get_stats(const struct netdev *netdev, struct netdev_stats *stats)
1211 COVERAGE_INC(netdev_get_stats);
1212 error = (netdev->netdev_class->get_stats
1213 ? netdev->netdev_class->get_stats(netdev, stats)
1216 memset(stats, 0xff, sizeof *stats);
1221 /* Attempts to change the stats for 'netdev' to those provided in 'stats'.
1222 * Returns 0 if successful, otherwise a positive errno value.
1224 * This will probably fail for most network devices. Some devices might only
1225 * allow setting their stats to 0. */
1227 netdev_set_stats(struct netdev *netdev, const struct netdev_stats *stats)
1229 return (netdev->netdev_class->set_stats
1230 ? netdev->netdev_class->set_stats(netdev, stats)
1234 /* Attempts to set input rate limiting (policing) policy, such that up to
1235 * 'kbits_rate' kbps of traffic is accepted, with a maximum accumulative burst
1236 * size of 'kbits' kb. */
1238 netdev_set_policing(struct netdev *netdev, uint32_t kbits_rate,
1239 uint32_t kbits_burst)
1241 return (netdev->netdev_class->set_policing
1242 ? netdev->netdev_class->set_policing(netdev,
1243 kbits_rate, kbits_burst)
1247 /* Adds to 'types' all of the forms of QoS supported by 'netdev', or leaves it
1248 * empty if 'netdev' does not support QoS. Any names added to 'types' should
1249 * be documented as valid for the "type" column in the "QoS" table in
1250 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1252 * Every network device supports disabling QoS with a type of "", but this type
1253 * will not be added to 'types'.
1255 * The caller must initialize 'types' (e.g. with sset_init()) before calling
1256 * this function. The caller is responsible for destroying 'types' (e.g. with
1257 * sset_destroy()) when it is no longer needed.
1259 * Returns 0 if successful, otherwise a positive errno value. */
1261 netdev_get_qos_types(const struct netdev *netdev, struct sset *types)
1263 const struct netdev_class *class = netdev->netdev_class;
1264 return (class->get_qos_types
1265 ? class->get_qos_types(netdev, types)
1269 /* Queries 'netdev' for its capabilities regarding the specified 'type' of QoS,
1270 * which should be "" or one of the types returned by netdev_get_qos_types()
1271 * for 'netdev'. Returns 0 if successful, otherwise a positive errno value.
1272 * On success, initializes 'caps' with the QoS capabilities; on failure, clears
1273 * 'caps' to all zeros. */
1275 netdev_get_qos_capabilities(const struct netdev *netdev, const char *type,
1276 struct netdev_qos_capabilities *caps)
1278 const struct netdev_class *class = netdev->netdev_class;
1281 int retval = (class->get_qos_capabilities
1282 ? class->get_qos_capabilities(netdev, type, caps)
1285 memset(caps, 0, sizeof *caps);
1289 /* Every netdev supports turning off QoS. */
1290 memset(caps, 0, sizeof *caps);
1295 /* Obtains the number of queues supported by 'netdev' for the specified 'type'
1296 * of QoS. Returns 0 if successful, otherwise a positive errno value. Stores
1297 * the number of queues (zero on failure) in '*n_queuesp'.
1299 * This is just a simple wrapper around netdev_get_qos_capabilities(). */
1301 netdev_get_n_queues(const struct netdev *netdev,
1302 const char *type, unsigned int *n_queuesp)
1304 struct netdev_qos_capabilities caps;
1307 retval = netdev_get_qos_capabilities(netdev, type, &caps);
1308 *n_queuesp = caps.n_queues;
1312 /* Queries 'netdev' about its currently configured form of QoS. If successful,
1313 * stores the name of the current form of QoS into '*typep', stores any details
1314 * of configuration as string key-value pairs in 'details', and returns 0. On
1315 * failure, sets '*typep' to NULL and returns a positive errno value.
1317 * A '*typep' of "" indicates that QoS is currently disabled on 'netdev'.
1319 * The caller must initialize 'details' as an empty smap (e.g. with
1320 * smap_init()) before calling this function. The caller must free 'details'
1321 * when it is no longer needed (e.g. with smap_destroy()).
1323 * The caller must not modify or free '*typep'.
1325 * '*typep' will be one of the types returned by netdev_get_qos_types() for
1326 * 'netdev'. The contents of 'details' should be documented as valid for
1327 * '*typep' in the "other_config" column in the "QoS" table in
1328 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)). */
1330 netdev_get_qos(const struct netdev *netdev,
1331 const char **typep, struct smap *details)
1333 const struct netdev_class *class = netdev->netdev_class;
1336 if (class->get_qos) {
1337 retval = class->get_qos(netdev, typep, details);
1340 smap_clear(details);
1344 /* 'netdev' doesn't support QoS, so report that QoS is disabled. */
1350 /* Attempts to reconfigure QoS on 'netdev', changing the form of QoS to 'type'
1351 * with details of configuration from 'details'. Returns 0 if successful,
1352 * otherwise a positive errno value. On error, the previous QoS configuration
1355 * When this function changes the type of QoS (not just 'details'), this also
1356 * resets all queue configuration for 'netdev' to their defaults (which depend
1357 * on the specific type of QoS). Otherwise, the queue configuration for
1358 * 'netdev' is unchanged.
1360 * 'type' should be "" (to disable QoS) or one of the types returned by
1361 * netdev_get_qos_types() for 'netdev'. The contents of 'details' should be
1362 * documented as valid for the given 'type' in the "other_config" column in the
1363 * "QoS" table in vswitchd/vswitch.xml (which is built as
1364 * ovs-vswitchd.conf.db(8)).
1366 * NULL may be specified for 'details' if there are no configuration
1369 netdev_set_qos(struct netdev *netdev,
1370 const char *type, const struct smap *details)
1372 const struct netdev_class *class = netdev->netdev_class;
1378 if (class->set_qos) {
1380 static const struct smap empty = SMAP_INITIALIZER(&empty);
1383 return class->set_qos(netdev, type, details);
1385 return *type ? EOPNOTSUPP : 0;
1389 /* Queries 'netdev' for information about the queue numbered 'queue_id'. If
1390 * successful, adds that information as string key-value pairs to 'details'.
1391 * Returns 0 if successful, otherwise a positive errno value.
1393 * 'queue_id' must be less than the number of queues supported by 'netdev' for
1394 * the current form of QoS (e.g. as returned by netdev_get_n_queues(netdev)).
1396 * The returned contents of 'details' should be documented as valid for the
1397 * given 'type' in the "other_config" column in the "Queue" table in
1398 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1400 * The caller must initialize 'details' (e.g. with smap_init()) before calling
1401 * this function. The caller must free 'details' when it is no longer needed
1402 * (e.g. with smap_destroy()). */
1404 netdev_get_queue(const struct netdev *netdev,
1405 unsigned int queue_id, struct smap *details)
1407 const struct netdev_class *class = netdev->netdev_class;
1410 retval = (class->get_queue
1411 ? class->get_queue(netdev, queue_id, details)
1414 smap_clear(details);
1419 /* Configures the queue numbered 'queue_id' on 'netdev' with the key-value
1420 * string pairs in 'details'. The contents of 'details' should be documented
1421 * as valid for the given 'type' in the "other_config" column in the "Queue"
1422 * table in vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1423 * Returns 0 if successful, otherwise a positive errno value. On failure, the
1424 * given queue's configuration should be unmodified.
1426 * 'queue_id' must be less than the number of queues supported by 'netdev' for
1427 * the current form of QoS (e.g. as returned by netdev_get_n_queues(netdev)).
1429 * This function does not modify 'details', and the caller retains ownership of
1432 netdev_set_queue(struct netdev *netdev,
1433 unsigned int queue_id, const struct smap *details)
1435 const struct netdev_class *class = netdev->netdev_class;
1436 return (class->set_queue
1437 ? class->set_queue(netdev, queue_id, details)
1441 /* Attempts to delete the queue numbered 'queue_id' from 'netdev'. Some kinds
1442 * of QoS may have a fixed set of queues, in which case attempts to delete them
1443 * will fail with EOPNOTSUPP.
1445 * Returns 0 if successful, otherwise a positive errno value. On failure, the
1446 * given queue will be unmodified.
1448 * 'queue_id' must be less than the number of queues supported by 'netdev' for
1449 * the current form of QoS (e.g. as returned by
1450 * netdev_get_n_queues(netdev)). */
1452 netdev_delete_queue(struct netdev *netdev, unsigned int queue_id)
1454 const struct netdev_class *class = netdev->netdev_class;
1455 return (class->delete_queue
1456 ? class->delete_queue(netdev, queue_id)
1460 /* Obtains statistics about 'queue_id' on 'netdev'. On success, returns 0 and
1461 * fills 'stats' with the queue's statistics; individual members of 'stats' may
1462 * be set to all-1-bits if the statistic is unavailable. On failure, returns a
1463 * positive errno value and fills 'stats' with values indicating unsupported
1466 netdev_get_queue_stats(const struct netdev *netdev, unsigned int queue_id,
1467 struct netdev_queue_stats *stats)
1469 const struct netdev_class *class = netdev->netdev_class;
1472 retval = (class->get_queue_stats
1473 ? class->get_queue_stats(netdev, queue_id, stats)
1476 stats->tx_bytes = UINT64_MAX;
1477 stats->tx_packets = UINT64_MAX;
1478 stats->tx_errors = UINT64_MAX;
1479 stats->created = LLONG_MIN;
1484 /* Initializes 'dump' to begin dumping the queues in a netdev.
1486 * This function provides no status indication. An error status for the entire
1487 * dump operation is provided when it is completed by calling
1488 * netdev_queue_dump_done().
1491 netdev_queue_dump_start(struct netdev_queue_dump *dump,
1492 const struct netdev *netdev)
1494 dump->netdev = netdev_ref(netdev);
1495 if (netdev->netdev_class->queue_dump_start) {
1496 dump->error = netdev->netdev_class->queue_dump_start(netdev,
1499 dump->error = EOPNOTSUPP;
1503 /* Attempts to retrieve another queue from 'dump', which must have been
1504 * initialized with netdev_queue_dump_start(). On success, stores a new queue
1505 * ID into '*queue_id', fills 'details' with configuration details for the
1506 * queue, and returns true. On failure, returns false.
1508 * Queues are not necessarily dumped in increasing order of queue ID (or any
1509 * other predictable order).
1511 * Failure might indicate an actual error or merely that the last queue has
1512 * been dumped. An error status for the entire dump operation is provided when
1513 * it is completed by calling netdev_queue_dump_done().
1515 * The returned contents of 'details' should be documented as valid for the
1516 * given 'type' in the "other_config" column in the "Queue" table in
1517 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1519 * The caller must initialize 'details' (e.g. with smap_init()) before calling
1520 * this function. This function will clear and replace its contents. The
1521 * caller must free 'details' when it is no longer needed (e.g. with
1522 * smap_destroy()). */
1524 netdev_queue_dump_next(struct netdev_queue_dump *dump,
1525 unsigned int *queue_id, struct smap *details)
1527 const struct netdev *netdev = dump->netdev;
1533 dump->error = netdev->netdev_class->queue_dump_next(netdev, dump->state,
1537 netdev->netdev_class->queue_dump_done(netdev, dump->state);
1543 /* Completes queue table dump operation 'dump', which must have been
1544 * initialized with netdev_queue_dump_start(). Returns 0 if the dump operation
1545 * was error-free, otherwise a positive errno value describing the problem. */
1547 netdev_queue_dump_done(struct netdev_queue_dump *dump)
1549 const struct netdev *netdev = dump->netdev;
1550 if (!dump->error && netdev->netdev_class->queue_dump_done) {
1551 dump->error = netdev->netdev_class->queue_dump_done(netdev,
1554 netdev_close(dump->netdev);
1555 return dump->error == EOF ? 0 : dump->error;
1558 /* Iterates over all of 'netdev''s queues, calling 'cb' with the queue's ID,
1559 * its statistics, and the 'aux' specified by the caller. The order of
1560 * iteration is unspecified, but (when successful) each queue is visited
1563 * Calling this function may be more efficient than calling
1564 * netdev_get_queue_stats() for every queue.
1566 * 'cb' must not modify or free the statistics passed in.
1568 * Returns 0 if successful, otherwise a positive errno value. On error, some
1569 * configured queues may not have been included in the iteration. */
1571 netdev_dump_queue_stats(const struct netdev *netdev,
1572 netdev_dump_queue_stats_cb *cb, void *aux)
1574 const struct netdev_class *class = netdev->netdev_class;
1575 return (class->dump_queue_stats
1576 ? class->dump_queue_stats(netdev, cb, aux)
1581 /* Returns the class type of 'netdev'.
1583 * The caller must not free the returned value. */
1585 netdev_get_type(const struct netdev *netdev)
1587 return netdev->netdev_class->type;
1590 /* Returns the class associated with 'netdev'. */
1591 const struct netdev_class *
1592 netdev_get_class(const struct netdev *netdev)
1594 return netdev->netdev_class;
1597 /* Returns the netdev with 'name' or NULL if there is none.
1599 * The caller must free the returned netdev with netdev_close(). */
1601 netdev_from_name(const char *name)
1602 OVS_EXCLUDED(netdev_mutex)
1604 struct netdev *netdev;
1606 ovs_mutex_lock(&netdev_mutex);
1607 netdev = shash_find_data(&netdev_shash, name);
1611 ovs_mutex_unlock(&netdev_mutex);
1616 /* Fills 'device_list' with devices that match 'netdev_class'.
1618 * The caller is responsible for initializing and destroying 'device_list' and
1619 * must close each device on the list. */
1621 netdev_get_devices(const struct netdev_class *netdev_class,
1622 struct shash *device_list)
1623 OVS_EXCLUDED(netdev_mutex)
1625 struct shash_node *node;
1627 ovs_mutex_lock(&netdev_mutex);
1628 SHASH_FOR_EACH (node, &netdev_shash) {
1629 struct netdev *dev = node->data;
1631 if (dev->netdev_class == netdev_class) {
1633 shash_add(device_list, node->name, node->data);
1636 ovs_mutex_unlock(&netdev_mutex);
1639 /* Extracts pointers to all 'netdev-vports' into an array 'vports'
1640 * and returns it. Stores the size of the array into '*size'.
1642 * The caller is responsible for freeing 'vports' and must close
1643 * each 'netdev-vport' in the list. */
1645 netdev_get_vports(size_t *size)
1646 OVS_EXCLUDED(netdev_mutex)
1648 struct netdev **vports;
1649 struct shash_node *node;
1656 /* Explicitly allocates big enough chunk of memory. */
1657 vports = xmalloc(shash_count(&netdev_shash) * sizeof *vports);
1658 ovs_mutex_lock(&netdev_mutex);
1659 SHASH_FOR_EACH (node, &netdev_shash) {
1660 struct netdev *dev = node->data;
1662 if (netdev_vport_is_vport_class(dev->netdev_class)) {
1668 ovs_mutex_unlock(&netdev_mutex);
1675 netdev_get_type_from_name(const char *name)
1677 struct netdev *dev = netdev_from_name(name);
1678 const char *type = dev ? netdev_get_type(dev) : NULL;
1684 netdev_rxq_get_netdev(const struct netdev_rxq *rx)
1686 ovs_assert(rx->netdev->ref_cnt > 0);
1691 netdev_rxq_get_name(const struct netdev_rxq *rx)
1693 return netdev_get_name(netdev_rxq_get_netdev(rx));
1697 restore_all_flags(void *aux OVS_UNUSED)
1699 struct shash_node *node;
1701 SHASH_FOR_EACH (node, &netdev_shash) {
1702 struct netdev *netdev = node->data;
1703 const struct netdev_saved_flags *sf;
1704 enum netdev_flags saved_values;
1705 enum netdev_flags saved_flags;
1707 saved_values = saved_flags = 0;
1708 LIST_FOR_EACH (sf, node, &netdev->saved_flags_list) {
1709 saved_flags |= sf->saved_flags;
1710 saved_values &= ~sf->saved_flags;
1711 saved_values |= sf->saved_flags & sf->saved_values;
1714 enum netdev_flags old_flags;
1716 netdev->netdev_class->update_flags(netdev,
1717 saved_flags & saved_values,
1718 saved_flags & ~saved_values,
1725 netdev_get_change_seq(const struct netdev *netdev)
1727 return netdev->change_seq;