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_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);
113 fatal_signal_add_hook(restore_all_flags, NULL, NULL, true);
114 netdev_vport_patch_register();
117 netdev_register_provider(&netdev_linux_class);
118 netdev_register_provider(&netdev_internal_class);
119 netdev_register_provider(&netdev_tap_class);
120 netdev_vport_tunnel_register();
122 #if defined(__FreeBSD__) || defined(__NetBSD__)
123 netdev_register_provider(&netdev_tap_class);
124 netdev_register_provider(&netdev_bsd_class);
126 netdev_dpdk_register();
128 ovsthread_once_done(&once);
132 /* Performs periodic work needed by all the various kinds of netdevs.
134 * If your program opens any netdevs, it must call this function within its
138 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
140 struct netdev_registered_class *rc;
142 ovs_mutex_lock(&netdev_class_mutex);
143 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
144 if (rc->class->run) {
148 ovs_mutex_unlock(&netdev_class_mutex);
151 /* Arranges for poll_block() to wake up when netdev_run() needs to be called.
153 * If your program opens any netdevs, it must call this function within its
157 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
159 struct netdev_registered_class *rc;
161 ovs_mutex_lock(&netdev_class_mutex);
162 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
163 if (rc->class->wait) {
167 ovs_mutex_unlock(&netdev_class_mutex);
170 static struct netdev_registered_class *
171 netdev_lookup_class(const char *type)
172 OVS_REQ_RDLOCK(netdev_class_mutex)
174 struct netdev_registered_class *rc;
176 HMAP_FOR_EACH_WITH_HASH (rc, hmap_node, hash_string(type, 0),
178 if (!strcmp(type, rc->class->type)) {
185 /* Initializes and registers a new netdev provider. After successful
186 * registration, new netdevs of that type can be opened using netdev_open(). */
188 netdev_register_provider(const struct netdev_class *new_class)
189 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
193 ovs_mutex_lock(&netdev_class_mutex);
194 if (netdev_lookup_class(new_class->type)) {
195 VLOG_WARN("attempted to register duplicate netdev provider: %s",
199 error = new_class->init ? new_class->init() : 0;
201 struct netdev_registered_class *rc;
203 rc = xmalloc(sizeof *rc);
204 hmap_insert(&netdev_classes, &rc->hmap_node,
205 hash_string(new_class->type, 0));
206 rc->class = new_class;
207 atomic_init(&rc->ref_cnt, 0);
209 VLOG_ERR("failed to initialize %s network device class: %s",
210 new_class->type, ovs_strerror(error));
213 ovs_mutex_unlock(&netdev_class_mutex);
218 /* Unregisters a netdev provider. 'type' must have been previously
219 * registered and not currently be in use by any netdevs. After unregistration
220 * new netdevs of that type cannot be opened using netdev_open(). */
222 netdev_unregister_provider(const char *type)
223 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
225 struct netdev_registered_class *rc;
228 ovs_mutex_lock(&netdev_class_mutex);
229 rc = netdev_lookup_class(type);
231 VLOG_WARN("attempted to unregister a netdev provider that is not "
232 "registered: %s", type);
233 error = EAFNOSUPPORT;
237 atomic_read(&rc->ref_cnt, &ref_cnt);
239 hmap_remove(&netdev_classes, &rc->hmap_node);
243 VLOG_WARN("attempted to unregister in use netdev provider: %s",
248 ovs_mutex_unlock(&netdev_class_mutex);
253 /* Clears 'types' and enumerates the types of all currently registered netdev
254 * providers into it. The caller must first initialize the sset. */
256 netdev_enumerate_types(struct sset *types)
257 OVS_EXCLUDED(netdev_mutex)
259 struct netdev_registered_class *rc;
264 ovs_mutex_lock(&netdev_class_mutex);
265 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
266 sset_add(types, rc->class->type);
268 ovs_mutex_unlock(&netdev_class_mutex);
271 /* Check that the network device name is not the same as any of the registered
272 * vport providers' dpif_port name (dpif_port is NULL if the vport provider
273 * does not define it) or the datapath internal port name (e.g. ovs-system).
275 * Returns true if there is a name conflict, false otherwise. */
277 netdev_is_reserved_name(const char *name)
278 OVS_EXCLUDED(netdev_mutex)
280 struct netdev_registered_class *rc;
284 ovs_mutex_lock(&netdev_class_mutex);
285 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
286 const char *dpif_port = netdev_vport_class_get_dpif_port(rc->class);
287 if (dpif_port && !strcmp(dpif_port, name)) {
288 ovs_mutex_unlock(&netdev_class_mutex);
292 ovs_mutex_unlock(&netdev_class_mutex);
294 if (!strncmp(name, "ovs-", 4)) {
299 dp_enumerate_types(&types);
300 SSET_FOR_EACH (type, &types) {
301 if (!strcmp(name+4, type)) {
302 sset_destroy(&types);
306 sset_destroy(&types);
312 /* Opens the network device named 'name' (e.g. "eth0") of the specified 'type'
313 * (e.g. "system") and returns zero if successful, otherwise a positive errno
314 * value. On success, sets '*netdevp' to the new network device, otherwise to
317 * Some network devices may need to be configured (with netdev_set_config())
318 * before they can be used. */
320 netdev_open(const char *name, const char *type, struct netdev **netdevp)
321 OVS_EXCLUDED(netdev_mutex)
323 struct netdev *netdev;
328 ovs_mutex_lock(&netdev_class_mutex);
329 ovs_mutex_lock(&netdev_mutex);
330 netdev = shash_find_data(&netdev_shash, name);
332 struct netdev_registered_class *rc;
334 rc = netdev_lookup_class(type && type[0] ? type : "system");
336 netdev = rc->class->alloc();
338 memset(netdev, 0, sizeof *netdev);
339 netdev->netdev_class = rc->class;
340 netdev->name = xstrdup(name);
341 netdev->change_seq = 1;
342 netdev->node = shash_add(&netdev_shash, name, netdev);
344 /* By default enable one rx queue per netdev. */
345 if (netdev->netdev_class->rxq_alloc) {
350 list_init(&netdev->saved_flags_list);
352 error = rc->class->construct(netdev);
356 atomic_add(&rc->ref_cnt, 1, &old_ref_cnt);
357 netdev_change_seq_changed(netdev);
360 ovs_assert(list_is_empty(&netdev->saved_flags_list));
361 shash_delete(&netdev_shash, netdev->node);
362 rc->class->dealloc(netdev);
368 VLOG_WARN("could not create netdev %s of unknown type %s",
370 error = EAFNOSUPPORT;
376 ovs_mutex_unlock(&netdev_mutex);
377 ovs_mutex_unlock(&netdev_class_mutex);
388 /* Returns a reference to 'netdev_' for the caller to own. Returns null if
389 * 'netdev_' is null. */
391 netdev_ref(const struct netdev *netdev_)
392 OVS_EXCLUDED(netdev_mutex)
394 struct netdev *netdev = CONST_CAST(struct netdev *, netdev_);
397 ovs_mutex_lock(&netdev_mutex);
398 ovs_assert(netdev->ref_cnt > 0);
400 ovs_mutex_unlock(&netdev_mutex);
405 /* Reconfigures the device 'netdev' with 'args'. 'args' may be empty
406 * or NULL if none are needed. */
408 netdev_set_config(struct netdev *netdev, const struct smap *args)
409 OVS_EXCLUDED(netdev_mutex)
411 if (netdev->netdev_class->set_config) {
412 const struct smap no_args = SMAP_INITIALIZER(&no_args);
415 error = netdev->netdev_class->set_config(netdev,
416 args ? args : &no_args);
418 VLOG_WARN("%s: could not set configuration (%s)",
419 netdev_get_name(netdev), ovs_strerror(error));
422 } else if (args && !smap_is_empty(args)) {
423 VLOG_WARN("%s: arguments provided to device that is not configurable",
424 netdev_get_name(netdev));
429 /* Returns the current configuration for 'netdev' in 'args'. The caller must
430 * have already initialized 'args' with smap_init(). Returns 0 on success, in
431 * which case 'args' will be filled with 'netdev''s configuration. On failure
432 * returns a positive errno value, in which case 'args' will be empty.
434 * The caller owns 'args' and its contents and must eventually free them with
437 netdev_get_config(const struct netdev *netdev, struct smap *args)
438 OVS_EXCLUDED(netdev_mutex)
443 if (netdev->netdev_class->get_config) {
444 error = netdev->netdev_class->get_config(netdev, args);
455 const struct netdev_tunnel_config *
456 netdev_get_tunnel_config(const struct netdev *netdev)
457 OVS_EXCLUDED(netdev_mutex)
459 if (netdev->netdev_class->get_tunnel_config) {
460 return netdev->netdev_class->get_tunnel_config(netdev);
467 netdev_unref(struct netdev *dev)
468 OVS_RELEASES(netdev_mutex)
470 ovs_assert(dev->ref_cnt);
471 if (!--dev->ref_cnt) {
472 const struct netdev_class *class = dev->netdev_class;
473 struct netdev_registered_class *rc;
476 dev->netdev_class->destruct(dev);
478 shash_delete(&netdev_shash, dev->node);
480 dev->netdev_class->dealloc(dev);
481 ovs_mutex_unlock(&netdev_mutex);
483 ovs_mutex_lock(&netdev_class_mutex);
484 rc = netdev_lookup_class(class->type);
485 atomic_sub(&rc->ref_cnt, 1, &old_ref_cnt);
486 ovs_assert(old_ref_cnt > 0);
487 ovs_mutex_unlock(&netdev_class_mutex);
489 ovs_mutex_unlock(&netdev_mutex);
493 /* Closes and destroys 'netdev'. */
495 netdev_close(struct netdev *netdev)
496 OVS_EXCLUDED(netdev_mutex)
499 ovs_mutex_lock(&netdev_mutex);
500 netdev_unref(netdev);
504 /* Parses 'netdev_name_', which is of the form [type@]name into its component
505 * pieces. 'name' and 'type' must be freed by the caller. */
507 netdev_parse_name(const char *netdev_name_, char **name, char **type)
509 char *netdev_name = xstrdup(netdev_name_);
512 separator = strchr(netdev_name, '@');
516 *name = xstrdup(separator + 1);
519 *type = xstrdup("system");
523 /* Attempts to open a netdev_rxq handle for obtaining packets received on
524 * 'netdev'. On success, returns 0 and stores a nonnull 'netdev_rxq *' into
525 * '*rxp'. On failure, returns a positive errno value and stores NULL into
528 * Some kinds of network devices might not support receiving packets. This
529 * function returns EOPNOTSUPP in that case.*/
531 netdev_rxq_open(struct netdev *netdev, struct netdev_rxq **rxp, int id)
532 OVS_EXCLUDED(netdev_mutex)
536 if (netdev->netdev_class->rxq_alloc && id < netdev->n_rxq) {
537 struct netdev_rxq *rx = netdev->netdev_class->rxq_alloc();
541 error = netdev->netdev_class->rxq_construct(rx);
543 ovs_mutex_lock(&netdev_mutex);
545 ovs_mutex_unlock(&netdev_mutex);
550 netdev->netdev_class->rxq_dealloc(rx);
564 netdev_rxq_close(struct netdev_rxq *rx)
565 OVS_EXCLUDED(netdev_mutex)
568 struct netdev *netdev = rx->netdev;
569 netdev->netdev_class->rxq_destruct(rx);
570 netdev->netdev_class->rxq_dealloc(rx);
571 netdev_close(netdev);
575 /* Attempts to receive batch of packets from 'rx'.
577 * Returns EAGAIN immediately if no packet is ready to be received.
579 * Returns EMSGSIZE, and discards the packet, if the received packet is longer
580 * than 'ofpbuf_tailroom(buffer)'.
582 * It is advised that the tailroom of 'buffer' should be
583 * VLAN_HEADER_LEN bytes longer than the MTU to allow space for an
584 * out-of-band VLAN header to be added to the packet. At the very least,
585 * 'buffer' must have at least ETH_TOTAL_MIN bytes of tailroom.
587 * This function may be set to null if it would always return EOPNOTSUPP
590 netdev_rxq_recv(struct netdev_rxq *rx, struct ofpbuf **buffers, int *cnt)
594 retval = rx->netdev->netdev_class->rxq_recv(rx, buffers, cnt);
596 COVERAGE_INC(netdev_received);
601 /* Arranges for poll_block() to wake up when a packet is ready to be received
604 netdev_rxq_wait(struct netdev_rxq *rx)
606 rx->netdev->netdev_class->rxq_wait(rx);
609 /* Discards any packets ready to be received on 'rx'. */
611 netdev_rxq_drain(struct netdev_rxq *rx)
613 return (rx->netdev->netdev_class->rxq_drain
614 ? rx->netdev->netdev_class->rxq_drain(rx)
618 /* Sends 'buffer' on 'netdev'. Returns 0 if successful, otherwise a positive
619 * errno value. Returns EAGAIN without blocking if the packet cannot be queued
620 * immediately. Returns EMSGSIZE if a partial packet was transmitted or if
621 * the packet is too big or too small to transmit on the device.
623 * To retain ownership of 'buffer' caller can set may_steal to false.
625 * The kernel maintains a packet transmission queue, so the caller is not
626 * expected to do additional queuing of packets.
628 * Some network devices may not implement support for this function. In such
629 * cases this function will always return EOPNOTSUPP. */
631 netdev_send(struct netdev *netdev, struct ofpbuf *buffer, bool may_steal)
635 error = (netdev->netdev_class->send
636 ? netdev->netdev_class->send(netdev, buffer, may_steal)
639 COVERAGE_INC(netdev_sent);
644 /* Registers with the poll loop to wake up from the next call to poll_block()
645 * when the packet transmission queue has sufficient room to transmit a packet
646 * with netdev_send().
648 * The kernel maintains a packet transmission queue, so the client is not
649 * expected to do additional queuing of packets. Thus, this function is
650 * unlikely to ever be used. It is included for completeness. */
652 netdev_send_wait(struct netdev *netdev)
654 if (netdev->netdev_class->send_wait) {
655 netdev->netdev_class->send_wait(netdev);
659 /* Attempts to set 'netdev''s MAC address to 'mac'. Returns 0 if successful,
660 * otherwise a positive errno value. */
662 netdev_set_etheraddr(struct netdev *netdev, const uint8_t mac[ETH_ADDR_LEN])
664 return netdev->netdev_class->set_etheraddr(netdev, mac);
667 /* Retrieves 'netdev''s MAC address. If successful, returns 0 and copies the
668 * the MAC address into 'mac'. On failure, returns a positive errno value and
669 * clears 'mac' to all-zeros. */
671 netdev_get_etheraddr(const struct netdev *netdev, uint8_t mac[ETH_ADDR_LEN])
673 return netdev->netdev_class->get_etheraddr(netdev, mac);
676 /* Returns the name of the network device that 'netdev' represents,
677 * e.g. "eth0". The caller must not modify or free the returned string. */
679 netdev_get_name(const struct netdev *netdev)
684 /* Retrieves the MTU of 'netdev'. The MTU is the maximum size of transmitted
685 * (and received) packets, in bytes, not including the hardware header; thus,
686 * this is typically 1500 bytes for Ethernet devices.
688 * If successful, returns 0 and stores the MTU size in '*mtup'. Returns
689 * EOPNOTSUPP if 'netdev' does not have an MTU (as e.g. some tunnels do not).
690 * On other failure, returns a positive errno value. On failure, sets '*mtup'
693 netdev_get_mtu(const struct netdev *netdev, int *mtup)
695 const struct netdev_class *class = netdev->netdev_class;
698 error = class->get_mtu ? class->get_mtu(netdev, mtup) : EOPNOTSUPP;
701 if (error != EOPNOTSUPP) {
702 VLOG_DBG_RL(&rl, "failed to retrieve MTU for network device %s: "
703 "%s", netdev_get_name(netdev), ovs_strerror(error));
709 /* Sets the MTU of 'netdev'. The MTU is the maximum size of transmitted
710 * (and received) packets, in bytes.
712 * If successful, returns 0. Returns EOPNOTSUPP if 'netdev' does not have an
713 * MTU (as e.g. some tunnels do not). On other failure, returns a positive
716 netdev_set_mtu(const struct netdev *netdev, int mtu)
718 const struct netdev_class *class = netdev->netdev_class;
721 error = class->set_mtu ? class->set_mtu(netdev, mtu) : EOPNOTSUPP;
722 if (error && error != EOPNOTSUPP) {
723 VLOG_DBG_RL(&rl, "failed to set MTU for network device %s: %s",
724 netdev_get_name(netdev), ovs_strerror(error));
730 /* Returns the ifindex of 'netdev', if successful, as a positive number. On
731 * failure, returns a negative errno value.
733 * The desired semantics of the ifindex value are a combination of those
734 * specified by POSIX for if_nametoindex() and by SNMP for ifIndex. An ifindex
735 * value should be unique within a host and remain stable at least until
736 * reboot. SNMP says an ifindex "ranges between 1 and the value of ifNumber"
737 * but many systems do not follow this rule anyhow.
739 * Some network devices may not implement support for this function. In such
740 * cases this function will always return -EOPNOTSUPP.
743 netdev_get_ifindex(const struct netdev *netdev)
745 int (*get_ifindex)(const struct netdev *);
747 get_ifindex = netdev->netdev_class->get_ifindex;
749 return get_ifindex ? get_ifindex(netdev) : -EOPNOTSUPP;
752 /* Stores the features supported by 'netdev' into each of '*current',
753 * '*advertised', '*supported', and '*peer' that are non-null. Each value is a
754 * bitmap of "enum ofp_port_features" bits, in host byte order. Returns 0 if
755 * successful, otherwise a positive errno value. On failure, all of the
756 * passed-in values are set to 0.
758 * Some network devices may not implement support for this function. In such
759 * cases this function will always return EOPNOTSUPP. */
761 netdev_get_features(const struct netdev *netdev,
762 enum netdev_features *current,
763 enum netdev_features *advertised,
764 enum netdev_features *supported,
765 enum netdev_features *peer)
767 int (*get_features)(const struct netdev *netdev,
768 enum netdev_features *current,
769 enum netdev_features *advertised,
770 enum netdev_features *supported,
771 enum netdev_features *peer);
772 enum netdev_features dummy[4];
779 advertised = &dummy[1];
782 supported = &dummy[2];
788 get_features = netdev->netdev_class->get_features;
790 ? get_features(netdev, current, advertised, supported,
794 *current = *advertised = *supported = *peer = 0;
799 /* Returns the maximum speed of a network connection that has the NETDEV_F_*
800 * bits in 'features', in bits per second. If no bits that indicate a speed
801 * are set in 'features', returns 'default_bps'. */
803 netdev_features_to_bps(enum netdev_features features,
804 uint64_t default_bps)
807 F_1000000MB = NETDEV_F_1TB_FD,
808 F_100000MB = NETDEV_F_100GB_FD,
809 F_40000MB = NETDEV_F_40GB_FD,
810 F_10000MB = NETDEV_F_10GB_FD,
811 F_1000MB = NETDEV_F_1GB_HD | NETDEV_F_1GB_FD,
812 F_100MB = NETDEV_F_100MB_HD | NETDEV_F_100MB_FD,
813 F_10MB = NETDEV_F_10MB_HD | NETDEV_F_10MB_FD
816 return ( features & F_1000000MB ? UINT64_C(1000000000000)
817 : features & F_100000MB ? UINT64_C(100000000000)
818 : features & F_40000MB ? UINT64_C(40000000000)
819 : features & F_10000MB ? UINT64_C(10000000000)
820 : features & F_1000MB ? UINT64_C(1000000000)
821 : features & F_100MB ? UINT64_C(100000000)
822 : features & F_10MB ? UINT64_C(10000000)
826 /* Returns true if any of the NETDEV_F_* bits that indicate a full-duplex link
827 * are set in 'features', otherwise false. */
829 netdev_features_is_full_duplex(enum netdev_features features)
831 return (features & (NETDEV_F_10MB_FD | NETDEV_F_100MB_FD | NETDEV_F_1GB_FD
832 | NETDEV_F_10GB_FD | NETDEV_F_40GB_FD
833 | NETDEV_F_100GB_FD | NETDEV_F_1TB_FD)) != 0;
836 /* Set the features advertised by 'netdev' to 'advertise'. Returns 0 if
837 * successful, otherwise a positive errno value. */
839 netdev_set_advertisements(struct netdev *netdev,
840 enum netdev_features advertise)
842 return (netdev->netdev_class->set_advertisements
843 ? netdev->netdev_class->set_advertisements(
848 /* If 'netdev' has an assigned IPv4 address, sets '*address' to that address
849 * and '*netmask' to its netmask and returns 0. Otherwise, returns a positive
850 * errno value and sets '*address' to 0 (INADDR_ANY).
852 * The following error values have well-defined meanings:
854 * - EADDRNOTAVAIL: 'netdev' has no assigned IPv4 address.
856 * - EOPNOTSUPP: No IPv4 network stack attached to 'netdev'.
858 * 'address' or 'netmask' or both may be null, in which case the address or
859 * netmask is not reported. */
861 netdev_get_in4(const struct netdev *netdev,
862 struct in_addr *address_, struct in_addr *netmask_)
864 struct in_addr address;
865 struct in_addr netmask;
868 error = (netdev->netdev_class->get_in4
869 ? netdev->netdev_class->get_in4(netdev,
873 address_->s_addr = error ? 0 : address.s_addr;
876 netmask_->s_addr = error ? 0 : netmask.s_addr;
881 /* Assigns 'addr' as 'netdev''s IPv4 address and 'mask' as its netmask. If
882 * 'addr' is INADDR_ANY, 'netdev''s IPv4 address is cleared. Returns a
883 * positive errno value. */
885 netdev_set_in4(struct netdev *netdev, struct in_addr addr, struct in_addr mask)
887 return (netdev->netdev_class->set_in4
888 ? netdev->netdev_class->set_in4(netdev, addr, mask)
892 /* Obtains ad IPv4 address from device name and save the address in
893 * in4. Returns 0 if successful, otherwise a positive errno value.
896 netdev_get_in4_by_name(const char *device_name, struct in_addr *in4)
898 struct netdev *netdev;
901 error = netdev_open(device_name, "system", &netdev);
903 in4->s_addr = htonl(0);
907 error = netdev_get_in4(netdev, in4, NULL);
908 netdev_close(netdev);
912 /* Adds 'router' as a default IP gateway for the TCP/IP stack that corresponds
915 netdev_add_router(struct netdev *netdev, struct in_addr router)
917 COVERAGE_INC(netdev_add_router);
918 return (netdev->netdev_class->add_router
919 ? netdev->netdev_class->add_router(netdev, router)
923 /* Looks up the next hop for 'host' for the TCP/IP stack that corresponds to
924 * 'netdev'. If a route cannot not be determined, sets '*next_hop' to 0,
925 * '*netdev_name' to null, and returns a positive errno value. Otherwise, if a
926 * next hop is found, stores the next hop gateway's address (0 if 'host' is on
927 * a directly connected network) in '*next_hop' and a copy of the name of the
928 * device to reach 'host' in '*netdev_name', and returns 0. The caller is
929 * responsible for freeing '*netdev_name' (by calling free()). */
931 netdev_get_next_hop(const struct netdev *netdev,
932 const struct in_addr *host, struct in_addr *next_hop,
935 int error = (netdev->netdev_class->get_next_hop
936 ? netdev->netdev_class->get_next_hop(
937 host, next_hop, netdev_name)
940 next_hop->s_addr = 0;
946 /* Populates 'smap' with status information.
948 * Populates 'smap' with 'netdev' specific status information. This
949 * information may be used to populate the status column of the Interface table
950 * as defined in ovs-vswitchd.conf.db(5). */
952 netdev_get_status(const struct netdev *netdev, struct smap *smap)
954 return (netdev->netdev_class->get_status
955 ? netdev->netdev_class->get_status(netdev, smap)
959 /* If 'netdev' has an assigned IPv6 address, sets '*in6' to that address and
960 * returns 0. Otherwise, returns a positive errno value and sets '*in6' to
961 * all-zero-bits (in6addr_any).
963 * The following error values have well-defined meanings:
965 * - EADDRNOTAVAIL: 'netdev' has no assigned IPv6 address.
967 * - EOPNOTSUPP: No IPv6 network stack attached to 'netdev'.
969 * 'in6' may be null, in which case the address itself is not reported. */
971 netdev_get_in6(const struct netdev *netdev, struct in6_addr *in6)
973 struct in6_addr dummy;
976 error = (netdev->netdev_class->get_in6
977 ? netdev->netdev_class->get_in6(netdev,
981 memset(in6, 0, sizeof *in6);
986 /* On 'netdev', turns off the flags in 'off' and then turns on the flags in
987 * 'on'. Returns 0 if successful, otherwise a positive errno value. */
989 do_update_flags(struct netdev *netdev, enum netdev_flags off,
990 enum netdev_flags on, enum netdev_flags *old_flagsp,
991 struct netdev_saved_flags **sfp)
992 OVS_EXCLUDED(netdev_mutex)
994 struct netdev_saved_flags *sf = NULL;
995 enum netdev_flags old_flags;
998 error = netdev->netdev_class->update_flags(netdev, off & ~on, on,
1001 VLOG_WARN_RL(&rl, "failed to %s flags for network device %s: %s",
1002 off || on ? "set" : "get", netdev_get_name(netdev),
1003 ovs_strerror(error));
1005 } else if ((off || on) && sfp) {
1006 enum netdev_flags new_flags = (old_flags & ~off) | on;
1007 enum netdev_flags changed_flags = old_flags ^ new_flags;
1008 if (changed_flags) {
1009 ovs_mutex_lock(&netdev_mutex);
1010 *sfp = sf = xmalloc(sizeof *sf);
1011 sf->netdev = netdev;
1012 list_push_front(&netdev->saved_flags_list, &sf->node);
1013 sf->saved_flags = changed_flags;
1014 sf->saved_values = changed_flags & new_flags;
1017 ovs_mutex_unlock(&netdev_mutex);
1022 *old_flagsp = old_flags;
1031 /* Obtains the current flags for 'netdev' and stores them into '*flagsp'.
1032 * Returns 0 if successful, otherwise a positive errno value. On failure,
1033 * stores 0 into '*flagsp'. */
1035 netdev_get_flags(const struct netdev *netdev_, enum netdev_flags *flagsp)
1037 struct netdev *netdev = CONST_CAST(struct netdev *, netdev_);
1038 return do_update_flags(netdev, 0, 0, flagsp, NULL);
1041 /* Sets the flags for 'netdev' to 'flags'.
1042 * Returns 0 if successful, otherwise a positive errno value. */
1044 netdev_set_flags(struct netdev *netdev, enum netdev_flags flags,
1045 struct netdev_saved_flags **sfp)
1047 return do_update_flags(netdev, -1, flags, NULL, sfp);
1050 /* Turns on the specified 'flags' on 'netdev':
1052 * - On success, returns 0. If 'sfp' is nonnull, sets '*sfp' to a newly
1053 * allocated 'struct netdev_saved_flags *' that may be passed to
1054 * netdev_restore_flags() to restore the original values of 'flags' on
1055 * 'netdev' (this will happen automatically at program termination if
1056 * netdev_restore_flags() is never called) , or to NULL if no flags were
1059 * - On failure, returns a positive errno value. If 'sfp' is nonnull, sets
1060 * '*sfp' to NULL. */
1062 netdev_turn_flags_on(struct netdev *netdev, enum netdev_flags flags,
1063 struct netdev_saved_flags **sfp)
1065 return do_update_flags(netdev, 0, flags, NULL, sfp);
1068 /* Turns off the specified 'flags' on 'netdev'. See netdev_turn_flags_on() for
1069 * details of the interface. */
1071 netdev_turn_flags_off(struct netdev *netdev, enum netdev_flags flags,
1072 struct netdev_saved_flags **sfp)
1074 return do_update_flags(netdev, flags, 0, NULL, sfp);
1077 /* Restores the flags that were saved in 'sf', and destroys 'sf'.
1078 * Does nothing if 'sf' is NULL. */
1080 netdev_restore_flags(struct netdev_saved_flags *sf)
1081 OVS_EXCLUDED(netdev_mutex)
1084 struct netdev *netdev = sf->netdev;
1085 enum netdev_flags old_flags;
1087 netdev->netdev_class->update_flags(netdev,
1088 sf->saved_flags & sf->saved_values,
1089 sf->saved_flags & ~sf->saved_values,
1092 ovs_mutex_lock(&netdev_mutex);
1093 list_remove(&sf->node);
1095 netdev_unref(netdev);
1099 /* Looks up the ARP table entry for 'ip' on 'netdev'. If one exists and can be
1100 * successfully retrieved, it stores the corresponding MAC address in 'mac' and
1101 * returns 0. Otherwise, it returns a positive errno value; in particular,
1102 * ENXIO indicates that there is no ARP table entry for 'ip' on 'netdev'. */
1104 netdev_arp_lookup(const struct netdev *netdev,
1105 ovs_be32 ip, uint8_t mac[ETH_ADDR_LEN])
1107 int error = (netdev->netdev_class->arp_lookup
1108 ? netdev->netdev_class->arp_lookup(netdev, ip, mac)
1111 memset(mac, 0, ETH_ADDR_LEN);
1116 /* Returns true if carrier is active (link light is on) on 'netdev'. */
1118 netdev_get_carrier(const struct netdev *netdev)
1121 enum netdev_flags flags;
1124 netdev_get_flags(netdev, &flags);
1125 if (!(flags & NETDEV_UP)) {
1129 if (!netdev->netdev_class->get_carrier) {
1133 error = netdev->netdev_class->get_carrier(netdev, &carrier);
1135 VLOG_DBG("%s: failed to get network device carrier status, assuming "
1136 "down: %s", netdev_get_name(netdev), ovs_strerror(error));
1143 /* Returns the number of times 'netdev''s carrier has changed. */
1145 netdev_get_carrier_resets(const struct netdev *netdev)
1147 return (netdev->netdev_class->get_carrier_resets
1148 ? netdev->netdev_class->get_carrier_resets(netdev)
1152 /* Attempts to force netdev_get_carrier() to poll 'netdev''s MII registers for
1153 * link status instead of checking 'netdev''s carrier. 'netdev''s MII
1154 * registers will be polled once ever 'interval' milliseconds. If 'netdev'
1155 * does not support MII, another method may be used as a fallback. If
1156 * 'interval' is less than or equal to zero, reverts netdev_get_carrier() to
1157 * its normal behavior.
1159 * Returns 0 if successful, otherwise a positive errno value. */
1161 netdev_set_miimon_interval(struct netdev *netdev, long long int interval)
1163 return (netdev->netdev_class->set_miimon_interval
1164 ? netdev->netdev_class->set_miimon_interval(netdev, interval)
1168 /* Retrieves current device stats for 'netdev'. */
1170 netdev_get_stats(const struct netdev *netdev, struct netdev_stats *stats)
1174 COVERAGE_INC(netdev_get_stats);
1175 error = (netdev->netdev_class->get_stats
1176 ? netdev->netdev_class->get_stats(netdev, stats)
1179 memset(stats, 0xff, sizeof *stats);
1184 /* Attempts to change the stats for 'netdev' to those provided in 'stats'.
1185 * Returns 0 if successful, otherwise a positive errno value.
1187 * This will probably fail for most network devices. Some devices might only
1188 * allow setting their stats to 0. */
1190 netdev_set_stats(struct netdev *netdev, const struct netdev_stats *stats)
1192 return (netdev->netdev_class->set_stats
1193 ? netdev->netdev_class->set_stats(netdev, stats)
1197 /* Attempts to set input rate limiting (policing) policy, such that up to
1198 * 'kbits_rate' kbps of traffic is accepted, with a maximum accumulative burst
1199 * size of 'kbits' kb. */
1201 netdev_set_policing(struct netdev *netdev, uint32_t kbits_rate,
1202 uint32_t kbits_burst)
1204 return (netdev->netdev_class->set_policing
1205 ? netdev->netdev_class->set_policing(netdev,
1206 kbits_rate, kbits_burst)
1210 /* Adds to 'types' all of the forms of QoS supported by 'netdev', or leaves it
1211 * empty if 'netdev' does not support QoS. Any names added to 'types' should
1212 * be documented as valid for the "type" column in the "QoS" table in
1213 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1215 * Every network device supports disabling QoS with a type of "", but this type
1216 * will not be added to 'types'.
1218 * The caller must initialize 'types' (e.g. with sset_init()) before calling
1219 * this function. The caller is responsible for destroying 'types' (e.g. with
1220 * sset_destroy()) when it is no longer needed.
1222 * Returns 0 if successful, otherwise a positive errno value. */
1224 netdev_get_qos_types(const struct netdev *netdev, struct sset *types)
1226 const struct netdev_class *class = netdev->netdev_class;
1227 return (class->get_qos_types
1228 ? class->get_qos_types(netdev, types)
1232 /* Queries 'netdev' for its capabilities regarding the specified 'type' of QoS,
1233 * which should be "" or one of the types returned by netdev_get_qos_types()
1234 * for 'netdev'. Returns 0 if successful, otherwise a positive errno value.
1235 * On success, initializes 'caps' with the QoS capabilities; on failure, clears
1236 * 'caps' to all zeros. */
1238 netdev_get_qos_capabilities(const struct netdev *netdev, const char *type,
1239 struct netdev_qos_capabilities *caps)
1241 const struct netdev_class *class = netdev->netdev_class;
1244 int retval = (class->get_qos_capabilities
1245 ? class->get_qos_capabilities(netdev, type, caps)
1248 memset(caps, 0, sizeof *caps);
1252 /* Every netdev supports turning off QoS. */
1253 memset(caps, 0, sizeof *caps);
1258 /* Obtains the number of queues supported by 'netdev' for the specified 'type'
1259 * of QoS. Returns 0 if successful, otherwise a positive errno value. Stores
1260 * the number of queues (zero on failure) in '*n_queuesp'.
1262 * This is just a simple wrapper around netdev_get_qos_capabilities(). */
1264 netdev_get_n_queues(const struct netdev *netdev,
1265 const char *type, unsigned int *n_queuesp)
1267 struct netdev_qos_capabilities caps;
1270 retval = netdev_get_qos_capabilities(netdev, type, &caps);
1271 *n_queuesp = caps.n_queues;
1275 /* Queries 'netdev' about its currently configured form of QoS. If successful,
1276 * stores the name of the current form of QoS into '*typep', stores any details
1277 * of configuration as string key-value pairs in 'details', and returns 0. On
1278 * failure, sets '*typep' to NULL and returns a positive errno value.
1280 * A '*typep' of "" indicates that QoS is currently disabled on 'netdev'.
1282 * The caller must initialize 'details' as an empty smap (e.g. with
1283 * smap_init()) before calling this function. The caller must free 'details'
1284 * when it is no longer needed (e.g. with smap_destroy()).
1286 * The caller must not modify or free '*typep'.
1288 * '*typep' will be one of the types returned by netdev_get_qos_types() for
1289 * 'netdev'. The contents of 'details' should be documented as valid for
1290 * '*typep' in the "other_config" column in the "QoS" table in
1291 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)). */
1293 netdev_get_qos(const struct netdev *netdev,
1294 const char **typep, struct smap *details)
1296 const struct netdev_class *class = netdev->netdev_class;
1299 if (class->get_qos) {
1300 retval = class->get_qos(netdev, typep, details);
1303 smap_clear(details);
1307 /* 'netdev' doesn't support QoS, so report that QoS is disabled. */
1313 /* Attempts to reconfigure QoS on 'netdev', changing the form of QoS to 'type'
1314 * with details of configuration from 'details'. Returns 0 if successful,
1315 * otherwise a positive errno value. On error, the previous QoS configuration
1318 * When this function changes the type of QoS (not just 'details'), this also
1319 * resets all queue configuration for 'netdev' to their defaults (which depend
1320 * on the specific type of QoS). Otherwise, the queue configuration for
1321 * 'netdev' is unchanged.
1323 * 'type' should be "" (to disable QoS) or one of the types returned by
1324 * netdev_get_qos_types() for 'netdev'. The contents of 'details' should be
1325 * documented as valid for the given 'type' in the "other_config" column in the
1326 * "QoS" table in vswitchd/vswitch.xml (which is built as
1327 * ovs-vswitchd.conf.db(8)).
1329 * NULL may be specified for 'details' if there are no configuration
1332 netdev_set_qos(struct netdev *netdev,
1333 const char *type, const struct smap *details)
1335 const struct netdev_class *class = netdev->netdev_class;
1341 if (class->set_qos) {
1343 static const struct smap empty = SMAP_INITIALIZER(&empty);
1346 return class->set_qos(netdev, type, details);
1348 return *type ? EOPNOTSUPP : 0;
1352 /* Queries 'netdev' for information about the queue numbered 'queue_id'. If
1353 * successful, adds that information as string key-value pairs to 'details'.
1354 * Returns 0 if successful, otherwise a positive errno value.
1356 * 'queue_id' must be less than the number of queues supported by 'netdev' for
1357 * the current form of QoS (e.g. as returned by netdev_get_n_queues(netdev)).
1359 * The returned contents of 'details' should be documented as valid for the
1360 * given 'type' in the "other_config" column in the "Queue" table in
1361 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1363 * The caller must initialize 'details' (e.g. with smap_init()) before calling
1364 * this function. The caller must free 'details' when it is no longer needed
1365 * (e.g. with smap_destroy()). */
1367 netdev_get_queue(const struct netdev *netdev,
1368 unsigned int queue_id, struct smap *details)
1370 const struct netdev_class *class = netdev->netdev_class;
1373 retval = (class->get_queue
1374 ? class->get_queue(netdev, queue_id, details)
1377 smap_clear(details);
1382 /* Configures the queue numbered 'queue_id' on 'netdev' with the key-value
1383 * string pairs in 'details'. The contents of 'details' should be documented
1384 * as valid for the given 'type' in the "other_config" column in the "Queue"
1385 * table in vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1386 * Returns 0 if successful, otherwise a positive errno value. On failure, the
1387 * given queue's configuration should be unmodified.
1389 * 'queue_id' must be less than the number of queues supported by 'netdev' for
1390 * the current form of QoS (e.g. as returned by netdev_get_n_queues(netdev)).
1392 * This function does not modify 'details', and the caller retains ownership of
1395 netdev_set_queue(struct netdev *netdev,
1396 unsigned int queue_id, const struct smap *details)
1398 const struct netdev_class *class = netdev->netdev_class;
1399 return (class->set_queue
1400 ? class->set_queue(netdev, queue_id, details)
1404 /* Attempts to delete the queue numbered 'queue_id' from 'netdev'. Some kinds
1405 * of QoS may have a fixed set of queues, in which case attempts to delete them
1406 * will fail with EOPNOTSUPP.
1408 * Returns 0 if successful, otherwise a positive errno value. On failure, the
1409 * given queue will be unmodified.
1411 * 'queue_id' must be less than the number of queues supported by 'netdev' for
1412 * the current form of QoS (e.g. as returned by
1413 * netdev_get_n_queues(netdev)). */
1415 netdev_delete_queue(struct netdev *netdev, unsigned int queue_id)
1417 const struct netdev_class *class = netdev->netdev_class;
1418 return (class->delete_queue
1419 ? class->delete_queue(netdev, queue_id)
1423 /* Obtains statistics about 'queue_id' on 'netdev'. On success, returns 0 and
1424 * fills 'stats' with the queue's statistics; individual members of 'stats' may
1425 * be set to all-1-bits if the statistic is unavailable. On failure, returns a
1426 * positive errno value and fills 'stats' with values indicating unsupported
1429 netdev_get_queue_stats(const struct netdev *netdev, unsigned int queue_id,
1430 struct netdev_queue_stats *stats)
1432 const struct netdev_class *class = netdev->netdev_class;
1435 retval = (class->get_queue_stats
1436 ? class->get_queue_stats(netdev, queue_id, stats)
1439 stats->tx_bytes = UINT64_MAX;
1440 stats->tx_packets = UINT64_MAX;
1441 stats->tx_errors = UINT64_MAX;
1442 stats->created = LLONG_MIN;
1447 /* Initializes 'dump' to begin dumping the queues in a netdev.
1449 * This function provides no status indication. An error status for the entire
1450 * dump operation is provided when it is completed by calling
1451 * netdev_queue_dump_done().
1454 netdev_queue_dump_start(struct netdev_queue_dump *dump,
1455 const struct netdev *netdev)
1457 dump->netdev = netdev_ref(netdev);
1458 if (netdev->netdev_class->queue_dump_start) {
1459 dump->error = netdev->netdev_class->queue_dump_start(netdev,
1462 dump->error = EOPNOTSUPP;
1466 /* Attempts to retrieve another queue from 'dump', which must have been
1467 * initialized with netdev_queue_dump_start(). On success, stores a new queue
1468 * ID into '*queue_id', fills 'details' with configuration details for the
1469 * queue, and returns true. On failure, returns false.
1471 * Queues are not necessarily dumped in increasing order of queue ID (or any
1472 * other predictable order).
1474 * Failure might indicate an actual error or merely that the last queue has
1475 * been dumped. An error status for the entire dump operation is provided when
1476 * it is completed by calling netdev_queue_dump_done().
1478 * The returned contents of 'details' should be documented as valid for the
1479 * given 'type' in the "other_config" column in the "Queue" table in
1480 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1482 * The caller must initialize 'details' (e.g. with smap_init()) before calling
1483 * this function. This function will clear and replace its contents. The
1484 * caller must free 'details' when it is no longer needed (e.g. with
1485 * smap_destroy()). */
1487 netdev_queue_dump_next(struct netdev_queue_dump *dump,
1488 unsigned int *queue_id, struct smap *details)
1490 const struct netdev *netdev = dump->netdev;
1496 dump->error = netdev->netdev_class->queue_dump_next(netdev, dump->state,
1500 netdev->netdev_class->queue_dump_done(netdev, dump->state);
1506 /* Completes queue table dump operation 'dump', which must have been
1507 * initialized with netdev_queue_dump_start(). Returns 0 if the dump operation
1508 * was error-free, otherwise a positive errno value describing the problem. */
1510 netdev_queue_dump_done(struct netdev_queue_dump *dump)
1512 const struct netdev *netdev = dump->netdev;
1513 if (!dump->error && netdev->netdev_class->queue_dump_done) {
1514 dump->error = netdev->netdev_class->queue_dump_done(netdev,
1517 netdev_close(dump->netdev);
1518 return dump->error == EOF ? 0 : dump->error;
1521 /* Iterates over all of 'netdev''s queues, calling 'cb' with the queue's ID,
1522 * its statistics, and the 'aux' specified by the caller. The order of
1523 * iteration is unspecified, but (when successful) each queue is visited
1526 * Calling this function may be more efficient than calling
1527 * netdev_get_queue_stats() for every queue.
1529 * 'cb' must not modify or free the statistics passed in.
1531 * Returns 0 if successful, otherwise a positive errno value. On error, some
1532 * configured queues may not have been included in the iteration. */
1534 netdev_dump_queue_stats(const struct netdev *netdev,
1535 netdev_dump_queue_stats_cb *cb, void *aux)
1537 const struct netdev_class *class = netdev->netdev_class;
1538 return (class->dump_queue_stats
1539 ? class->dump_queue_stats(netdev, cb, aux)
1544 /* Returns the class type of 'netdev'.
1546 * The caller must not free the returned value. */
1548 netdev_get_type(const struct netdev *netdev)
1550 return netdev->netdev_class->type;
1553 /* Returns the class associated with 'netdev'. */
1554 const struct netdev_class *
1555 netdev_get_class(const struct netdev *netdev)
1557 return netdev->netdev_class;
1560 /* Returns the netdev with 'name' or NULL if there is none.
1562 * The caller must free the returned netdev with netdev_close(). */
1564 netdev_from_name(const char *name)
1565 OVS_EXCLUDED(netdev_mutex)
1567 struct netdev *netdev;
1569 ovs_mutex_lock(&netdev_mutex);
1570 netdev = shash_find_data(&netdev_shash, name);
1574 ovs_mutex_unlock(&netdev_mutex);
1579 /* Fills 'device_list' with devices that match 'netdev_class'.
1581 * The caller is responsible for initializing and destroying 'device_list' and
1582 * must close each device on the list. */
1584 netdev_get_devices(const struct netdev_class *netdev_class,
1585 struct shash *device_list)
1586 OVS_EXCLUDED(netdev_mutex)
1588 struct shash_node *node;
1590 ovs_mutex_lock(&netdev_mutex);
1591 SHASH_FOR_EACH (node, &netdev_shash) {
1592 struct netdev *dev = node->data;
1594 if (dev->netdev_class == netdev_class) {
1596 shash_add(device_list, node->name, node->data);
1599 ovs_mutex_unlock(&netdev_mutex);
1603 netdev_get_type_from_name(const char *name)
1605 struct netdev *dev = netdev_from_name(name);
1606 const char *type = dev ? netdev_get_type(dev) : NULL;
1612 netdev_rxq_get_netdev(const struct netdev_rxq *rx)
1614 ovs_assert(rx->netdev->ref_cnt > 0);
1619 netdev_rxq_get_name(const struct netdev_rxq *rx)
1621 return netdev_get_name(netdev_rxq_get_netdev(rx));
1625 restore_all_flags(void *aux OVS_UNUSED)
1627 struct shash_node *node;
1629 SHASH_FOR_EACH (node, &netdev_shash) {
1630 struct netdev *netdev = node->data;
1631 const struct netdev_saved_flags *sf;
1632 enum netdev_flags saved_values;
1633 enum netdev_flags saved_flags;
1635 saved_values = saved_flags = 0;
1636 LIST_FOR_EACH (sf, node, &netdev->saved_flags_list) {
1637 saved_flags |= sf->saved_flags;
1638 saved_values &= ~sf->saved_flags;
1639 saved_values |= sf->saved_flags & sf->saved_values;
1642 enum netdev_flags old_flags;
1644 netdev->netdev_class->update_flags(netdev,
1645 saved_flags & saved_values,
1646 saved_flags & ~saved_values,
1653 netdev_get_change_seq(const struct netdev *netdev)
1655 return netdev->change_seq;