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>
27 #include "connectivity.h"
30 #include "dynamic-string.h"
31 #include "fatal-signal.h"
34 #include "netdev-provider.h"
35 #include "netdev-vport.h"
37 #include "openflow/openflow.h"
39 #include "poll-loop.h"
47 VLOG_DEFINE_THIS_MODULE(netdev);
49 COVERAGE_DEFINE(netdev_received);
50 COVERAGE_DEFINE(netdev_sent);
51 COVERAGE_DEFINE(netdev_add_router);
52 COVERAGE_DEFINE(netdev_get_stats);
54 struct netdev_saved_flags {
55 struct netdev *netdev;
56 struct list node; /* In struct netdev's saved_flags_list. */
57 enum netdev_flags saved_flags;
58 enum netdev_flags saved_values;
61 /* Protects 'netdev_shash' and the mutable members of struct netdev. */
62 static struct ovs_mutex netdev_mutex = OVS_MUTEX_INITIALIZER;
64 /* All created network devices. */
65 static struct shash netdev_shash OVS_GUARDED_BY(netdev_mutex)
66 = SHASH_INITIALIZER(&netdev_shash);
68 /* Protects 'netdev_classes' against insertions or deletions.
70 * This is a recursive mutex to allow recursive acquisition when calling into
71 * providers. For example, netdev_run() calls into provider 'run' functions,
72 * which might reasonably want to call one of the netdev functions that takes
73 * netdev_class_mutex. */
74 static struct ovs_mutex netdev_class_mutex OVS_ACQ_BEFORE(netdev_mutex);
76 /* Contains 'struct netdev_registered_class'es. */
77 static struct hmap netdev_classes OVS_GUARDED_BY(netdev_class_mutex)
78 = HMAP_INITIALIZER(&netdev_classes);
80 struct netdev_registered_class {
81 struct hmap_node hmap_node; /* In 'netdev_classes', by class->type. */
82 const struct netdev_class *class;
83 atomic_int ref_cnt; /* Number of 'struct netdev's of this class. */
86 /* This is set pretty low because we probably won't learn anything from the
87 * additional log messages. */
88 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
90 static void restore_all_flags(void *aux OVS_UNUSED);
91 void update_device_args(struct netdev *, const struct shash *args);
94 netdev_is_pmd(const struct netdev *netdev)
96 return !strcmp(netdev->netdev_class->type, "dpdk");
100 netdev_initialize(void)
101 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
103 static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
105 if (ovsthread_once_start(&once)) {
106 ovs_mutex_init_recursive(&netdev_class_mutex);
108 fatal_signal_add_hook(restore_all_flags, NULL, NULL, true);
109 netdev_vport_patch_register();
112 netdev_register_provider(&netdev_linux_class);
113 netdev_register_provider(&netdev_internal_class);
114 netdev_register_provider(&netdev_tap_class);
115 netdev_vport_tunnel_register();
117 #if defined(__FreeBSD__) || defined(__NetBSD__)
118 netdev_register_provider(&netdev_tap_class);
119 netdev_register_provider(&netdev_bsd_class);
122 ovsthread_once_done(&once);
126 /* Performs periodic work needed by all the various kinds of netdevs.
128 * If your program opens any netdevs, it must call this function within its
132 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
134 struct netdev_registered_class *rc;
136 ovs_mutex_lock(&netdev_class_mutex);
137 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
138 if (rc->class->run) {
142 ovs_mutex_unlock(&netdev_class_mutex);
145 /* Arranges for poll_block() to wake up when netdev_run() needs to be called.
147 * If your program opens any netdevs, it must call this function within its
151 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
153 struct netdev_registered_class *rc;
155 ovs_mutex_lock(&netdev_class_mutex);
156 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
157 if (rc->class->wait) {
161 ovs_mutex_unlock(&netdev_class_mutex);
164 static struct netdev_registered_class *
165 netdev_lookup_class(const char *type)
166 OVS_REQ_RDLOCK(netdev_class_mutex)
168 struct netdev_registered_class *rc;
170 HMAP_FOR_EACH_WITH_HASH (rc, hmap_node, hash_string(type, 0),
172 if (!strcmp(type, rc->class->type)) {
179 /* Initializes and registers a new netdev provider. After successful
180 * registration, new netdevs of that type can be opened using netdev_open(). */
182 netdev_register_provider(const struct netdev_class *new_class)
183 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
187 ovs_mutex_lock(&netdev_class_mutex);
188 if (netdev_lookup_class(new_class->type)) {
189 VLOG_WARN("attempted to register duplicate netdev provider: %s",
193 error = new_class->init ? new_class->init() : 0;
195 struct netdev_registered_class *rc;
197 rc = xmalloc(sizeof *rc);
198 hmap_insert(&netdev_classes, &rc->hmap_node,
199 hash_string(new_class->type, 0));
200 rc->class = new_class;
201 atomic_init(&rc->ref_cnt, 0);
203 VLOG_ERR("failed to initialize %s network device class: %s",
204 new_class->type, ovs_strerror(error));
207 ovs_mutex_unlock(&netdev_class_mutex);
212 /* Unregisters a netdev provider. 'type' must have been previously
213 * registered and not currently be in use by any netdevs. After unregistration
214 * new netdevs of that type cannot be opened using netdev_open(). */
216 netdev_unregister_provider(const char *type)
217 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
219 struct netdev_registered_class *rc;
222 ovs_mutex_lock(&netdev_class_mutex);
223 rc = netdev_lookup_class(type);
225 VLOG_WARN("attempted to unregister a netdev provider that is not "
226 "registered: %s", type);
227 error = EAFNOSUPPORT;
231 atomic_read(&rc->ref_cnt, &ref_cnt);
233 hmap_remove(&netdev_classes, &rc->hmap_node);
237 VLOG_WARN("attempted to unregister in use netdev provider: %s",
242 ovs_mutex_unlock(&netdev_class_mutex);
247 /* Clears 'types' and enumerates the types of all currently registered netdev
248 * providers into it. The caller must first initialize the sset. */
250 netdev_enumerate_types(struct sset *types)
251 OVS_EXCLUDED(netdev_mutex)
253 struct netdev_registered_class *rc;
258 ovs_mutex_lock(&netdev_class_mutex);
259 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
260 sset_add(types, rc->class->type);
262 ovs_mutex_unlock(&netdev_class_mutex);
265 /* Check that the network device name is not the same as any of the registered
266 * vport providers' dpif_port name (dpif_port is NULL if the vport provider
267 * does not define it) or the datapath internal port name (e.g. ovs-system).
269 * Returns true if there is a name conflict, false otherwise. */
271 netdev_is_reserved_name(const char *name)
272 OVS_EXCLUDED(netdev_mutex)
274 struct netdev_registered_class *rc;
278 ovs_mutex_lock(&netdev_class_mutex);
279 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
280 const char *dpif_port = netdev_vport_class_get_dpif_port(rc->class);
281 if (dpif_port && !strcmp(dpif_port, name)) {
282 ovs_mutex_unlock(&netdev_class_mutex);
286 ovs_mutex_unlock(&netdev_class_mutex);
288 if (!strncmp(name, "ovs-", 4)) {
293 dp_enumerate_types(&types);
294 SSET_FOR_EACH (type, &types) {
295 if (!strcmp(name+4, type)) {
296 sset_destroy(&types);
300 sset_destroy(&types);
306 /* Opens the network device named 'name' (e.g. "eth0") of the specified 'type'
307 * (e.g. "system") and returns zero if successful, otherwise a positive errno
308 * value. On success, sets '*netdevp' to the new network device, otherwise to
311 * Some network devices may need to be configured (with netdev_set_config())
312 * before they can be used. */
314 netdev_open(const char *name, const char *type, struct netdev **netdevp)
315 OVS_EXCLUDED(netdev_mutex)
317 struct netdev *netdev;
322 ovs_mutex_lock(&netdev_class_mutex);
323 ovs_mutex_lock(&netdev_mutex);
324 netdev = shash_find_data(&netdev_shash, name);
326 struct netdev_registered_class *rc;
328 rc = netdev_lookup_class(type && type[0] ? type : "system");
330 netdev = rc->class->alloc();
332 memset(netdev, 0, sizeof *netdev);
333 netdev->netdev_class = rc->class;
334 netdev->name = xstrdup(name);
335 netdev->node = shash_add(&netdev_shash, name, netdev);
336 list_init(&netdev->saved_flags_list);
338 error = rc->class->construct(netdev);
342 atomic_add(&rc->ref_cnt, 1, &old_ref_cnt);
343 seq_change(connectivity_seq_get());
346 ovs_assert(list_is_empty(&netdev->saved_flags_list));
347 shash_delete(&netdev_shash, netdev->node);
348 rc->class->dealloc(netdev);
354 VLOG_WARN("could not create netdev %s of unknown type %s",
356 error = EAFNOSUPPORT;
362 ovs_mutex_unlock(&netdev_mutex);
363 ovs_mutex_unlock(&netdev_class_mutex);
374 /* Returns a reference to 'netdev_' for the caller to own. Returns null if
375 * 'netdev_' is null. */
377 netdev_ref(const struct netdev *netdev_)
378 OVS_EXCLUDED(netdev_mutex)
380 struct netdev *netdev = CONST_CAST(struct netdev *, netdev_);
383 ovs_mutex_lock(&netdev_mutex);
384 ovs_assert(netdev->ref_cnt > 0);
386 ovs_mutex_unlock(&netdev_mutex);
391 /* Reconfigures the device 'netdev' with 'args'. 'args' may be empty
392 * or NULL if none are needed. */
394 netdev_set_config(struct netdev *netdev, const struct smap *args)
395 OVS_EXCLUDED(netdev_mutex)
397 if (netdev->netdev_class->set_config) {
398 const struct smap no_args = SMAP_INITIALIZER(&no_args);
401 error = netdev->netdev_class->set_config(netdev,
402 args ? args : &no_args);
404 VLOG_WARN("%s: could not set configuration (%s)",
405 netdev_get_name(netdev), ovs_strerror(error));
408 } else if (args && !smap_is_empty(args)) {
409 VLOG_WARN("%s: arguments provided to device that is not configurable",
410 netdev_get_name(netdev));
415 /* Returns the current configuration for 'netdev' in 'args'. The caller must
416 * have already initialized 'args' with smap_init(). Returns 0 on success, in
417 * which case 'args' will be filled with 'netdev''s configuration. On failure
418 * returns a positive errno value, in which case 'args' will be empty.
420 * The caller owns 'args' and its contents and must eventually free them with
423 netdev_get_config(const struct netdev *netdev, struct smap *args)
424 OVS_EXCLUDED(netdev_mutex)
429 if (netdev->netdev_class->get_config) {
430 error = netdev->netdev_class->get_config(netdev, args);
441 const struct netdev_tunnel_config *
442 netdev_get_tunnel_config(const struct netdev *netdev)
443 OVS_EXCLUDED(netdev_mutex)
445 if (netdev->netdev_class->get_tunnel_config) {
446 return netdev->netdev_class->get_tunnel_config(netdev);
453 netdev_unref(struct netdev *dev)
454 OVS_RELEASES(netdev_mutex)
456 ovs_assert(dev->ref_cnt);
457 if (!--dev->ref_cnt) {
458 const struct netdev_class *class = dev->netdev_class;
459 struct netdev_registered_class *rc;
462 dev->netdev_class->destruct(dev);
464 shash_delete(&netdev_shash, dev->node);
466 dev->netdev_class->dealloc(dev);
467 ovs_mutex_unlock(&netdev_mutex);
469 ovs_mutex_lock(&netdev_class_mutex);
470 rc = netdev_lookup_class(class->type);
471 atomic_sub(&rc->ref_cnt, 1, &old_ref_cnt);
472 ovs_assert(old_ref_cnt > 0);
473 ovs_mutex_unlock(&netdev_class_mutex);
475 ovs_mutex_unlock(&netdev_mutex);
479 /* Closes and destroys 'netdev'. */
481 netdev_close(struct netdev *netdev)
482 OVS_EXCLUDED(netdev_mutex)
485 ovs_mutex_lock(&netdev_mutex);
486 netdev_unref(netdev);
490 /* Parses 'netdev_name_', which is of the form [type@]name into its component
491 * pieces. 'name' and 'type' must be freed by the caller. */
493 netdev_parse_name(const char *netdev_name_, char **name, char **type)
495 char *netdev_name = xstrdup(netdev_name_);
498 separator = strchr(netdev_name, '@');
502 *name = xstrdup(separator + 1);
505 *type = xstrdup("system");
509 /* Attempts to open a netdev_rxq handle for obtaining packets received on
510 * 'netdev'. On success, returns 0 and stores a nonnull 'netdev_rxq *' into
511 * '*rxp'. On failure, returns a positive errno value and stores NULL into
514 * Some kinds of network devices might not support receiving packets. This
515 * function returns EOPNOTSUPP in that case.*/
517 netdev_rxq_open(struct netdev *netdev, struct netdev_rxq **rxp)
518 OVS_EXCLUDED(netdev_mutex)
522 if (netdev->netdev_class->rxq_alloc) {
523 struct netdev_rxq *rx = netdev->netdev_class->rxq_alloc();
526 error = netdev->netdev_class->rxq_construct(rx);
528 ovs_mutex_lock(&netdev_mutex);
530 ovs_mutex_unlock(&netdev_mutex);
535 netdev->netdev_class->rxq_dealloc(rx);
549 netdev_rxq_close(struct netdev_rxq *rx)
550 OVS_EXCLUDED(netdev_mutex)
553 struct netdev *netdev = rx->netdev;
554 netdev->netdev_class->rxq_destruct(rx);
555 netdev->netdev_class->rxq_dealloc(rx);
556 netdev_close(netdev);
560 /* Attempts to receive batch of packets from 'rx'.
562 * Returns EAGAIN immediately if no packet is ready to be received.
564 * Returns EMSGSIZE, and discards the packet, if the received packet is longer
565 * than 'ofpbuf_tailroom(buffer)'.
567 * It is advised that the tailroom of 'buffer' should be
568 * VLAN_HEADER_LEN bytes longer than the MTU to allow space for an
569 * out-of-band VLAN header to be added to the packet. At the very least,
570 * 'buffer' must have at least ETH_TOTAL_MIN bytes of tailroom.
572 * This function may be set to null if it would always return EOPNOTSUPP
575 netdev_rxq_recv(struct netdev_rxq *rx, struct ofpbuf **buffers, int *cnt)
579 retval = rx->netdev->netdev_class->rxq_recv(rx, buffers, cnt);
581 COVERAGE_INC(netdev_received);
586 /* Arranges for poll_block() to wake up when a packet is ready to be received
589 netdev_rxq_wait(struct netdev_rxq *rx)
591 rx->netdev->netdev_class->rxq_wait(rx);
594 /* Discards any packets ready to be received on 'rx'. */
596 netdev_rxq_drain(struct netdev_rxq *rx)
598 return (rx->netdev->netdev_class->rxq_drain
599 ? rx->netdev->netdev_class->rxq_drain(rx)
603 /* Sends 'buffer' on 'netdev'. Returns 0 if successful, otherwise a positive
604 * errno value. Returns EAGAIN without blocking if the packet cannot be queued
605 * immediately. Returns EMSGSIZE if a partial packet was transmitted or if
606 * the packet is too big or too small to transmit on the device.
608 * To retain ownership of 'buffer' caller can set may_steal to false.
610 * The kernel maintains a packet transmission queue, so the caller is not
611 * expected to do additional queuing of packets.
613 * Some network devices may not implement support for this function. In such
614 * cases this function will always return EOPNOTSUPP. */
616 netdev_send(struct netdev *netdev, struct ofpbuf *buffer, bool may_steal)
620 error = (netdev->netdev_class->send
621 ? netdev->netdev_class->send(netdev, buffer, may_steal)
624 COVERAGE_INC(netdev_sent);
629 /* Registers with the poll loop to wake up from the next call to poll_block()
630 * when the packet transmission queue has sufficient room to transmit a packet
631 * with netdev_send().
633 * The kernel maintains a packet transmission queue, so the client is not
634 * expected to do additional queuing of packets. Thus, this function is
635 * unlikely to ever be used. It is included for completeness. */
637 netdev_send_wait(struct netdev *netdev)
639 if (netdev->netdev_class->send_wait) {
640 netdev->netdev_class->send_wait(netdev);
644 /* Attempts to set 'netdev''s MAC address to 'mac'. Returns 0 if successful,
645 * otherwise a positive errno value. */
647 netdev_set_etheraddr(struct netdev *netdev, const uint8_t mac[ETH_ADDR_LEN])
649 return netdev->netdev_class->set_etheraddr(netdev, mac);
652 /* Retrieves 'netdev''s MAC address. If successful, returns 0 and copies the
653 * the MAC address into 'mac'. On failure, returns a positive errno value and
654 * clears 'mac' to all-zeros. */
656 netdev_get_etheraddr(const struct netdev *netdev, uint8_t mac[ETH_ADDR_LEN])
658 return netdev->netdev_class->get_etheraddr(netdev, mac);
661 /* Returns the name of the network device that 'netdev' represents,
662 * e.g. "eth0". The caller must not modify or free the returned string. */
664 netdev_get_name(const struct netdev *netdev)
669 /* Retrieves the MTU of 'netdev'. The MTU is the maximum size of transmitted
670 * (and received) packets, in bytes, not including the hardware header; thus,
671 * this is typically 1500 bytes for Ethernet devices.
673 * If successful, returns 0 and stores the MTU size in '*mtup'. Returns
674 * EOPNOTSUPP if 'netdev' does not have an MTU (as e.g. some tunnels do not).
675 * On other failure, returns a positive errno value. On failure, sets '*mtup'
678 netdev_get_mtu(const struct netdev *netdev, int *mtup)
680 const struct netdev_class *class = netdev->netdev_class;
683 error = class->get_mtu ? class->get_mtu(netdev, mtup) : EOPNOTSUPP;
686 if (error != EOPNOTSUPP) {
687 VLOG_DBG_RL(&rl, "failed to retrieve MTU for network device %s: "
688 "%s", netdev_get_name(netdev), ovs_strerror(error));
694 /* Sets the MTU of 'netdev'. The MTU is the maximum size of transmitted
695 * (and received) packets, in bytes.
697 * If successful, returns 0. Returns EOPNOTSUPP if 'netdev' does not have an
698 * MTU (as e.g. some tunnels do not). On other failure, returns a positive
701 netdev_set_mtu(const struct netdev *netdev, int mtu)
703 const struct netdev_class *class = netdev->netdev_class;
706 error = class->set_mtu ? class->set_mtu(netdev, mtu) : EOPNOTSUPP;
707 if (error && error != EOPNOTSUPP) {
708 VLOG_DBG_RL(&rl, "failed to set MTU for network device %s: %s",
709 netdev_get_name(netdev), ovs_strerror(error));
715 /* Returns the ifindex of 'netdev', if successful, as a positive number. On
716 * failure, returns a negative errno value.
718 * The desired semantics of the ifindex value are a combination of those
719 * specified by POSIX for if_nametoindex() and by SNMP for ifIndex. An ifindex
720 * value should be unique within a host and remain stable at least until
721 * reboot. SNMP says an ifindex "ranges between 1 and the value of ifNumber"
722 * but many systems do not follow this rule anyhow.
724 * Some network devices may not implement support for this function. In such
725 * cases this function will always return -EOPNOTSUPP.
728 netdev_get_ifindex(const struct netdev *netdev)
730 int (*get_ifindex)(const struct netdev *);
732 get_ifindex = netdev->netdev_class->get_ifindex;
734 return get_ifindex ? get_ifindex(netdev) : -EOPNOTSUPP;
737 /* Stores the features supported by 'netdev' into each of '*current',
738 * '*advertised', '*supported', and '*peer' that are non-null. Each value is a
739 * bitmap of "enum ofp_port_features" bits, in host byte order. Returns 0 if
740 * successful, otherwise a positive errno value. On failure, all of the
741 * passed-in values are set to 0.
743 * Some network devices may not implement support for this function. In such
744 * cases this function will always return EOPNOTSUPP. */
746 netdev_get_features(const struct netdev *netdev,
747 enum netdev_features *current,
748 enum netdev_features *advertised,
749 enum netdev_features *supported,
750 enum netdev_features *peer)
752 int (*get_features)(const struct netdev *netdev,
753 enum netdev_features *current,
754 enum netdev_features *advertised,
755 enum netdev_features *supported,
756 enum netdev_features *peer);
757 enum netdev_features dummy[4];
764 advertised = &dummy[1];
767 supported = &dummy[2];
773 get_features = netdev->netdev_class->get_features;
775 ? get_features(netdev, current, advertised, supported,
779 *current = *advertised = *supported = *peer = 0;
784 /* Returns the maximum speed of a network connection that has the NETDEV_F_*
785 * bits in 'features', in bits per second. If no bits that indicate a speed
786 * are set in 'features', returns 'default_bps'. */
788 netdev_features_to_bps(enum netdev_features features,
789 uint64_t default_bps)
792 F_1000000MB = NETDEV_F_1TB_FD,
793 F_100000MB = NETDEV_F_100GB_FD,
794 F_40000MB = NETDEV_F_40GB_FD,
795 F_10000MB = NETDEV_F_10GB_FD,
796 F_1000MB = NETDEV_F_1GB_HD | NETDEV_F_1GB_FD,
797 F_100MB = NETDEV_F_100MB_HD | NETDEV_F_100MB_FD,
798 F_10MB = NETDEV_F_10MB_HD | NETDEV_F_10MB_FD
801 return ( features & F_1000000MB ? UINT64_C(1000000000000)
802 : features & F_100000MB ? UINT64_C(100000000000)
803 : features & F_40000MB ? UINT64_C(40000000000)
804 : features & F_10000MB ? UINT64_C(10000000000)
805 : features & F_1000MB ? UINT64_C(1000000000)
806 : features & F_100MB ? UINT64_C(100000000)
807 : features & F_10MB ? UINT64_C(10000000)
811 /* Returns true if any of the NETDEV_F_* bits that indicate a full-duplex link
812 * are set in 'features', otherwise false. */
814 netdev_features_is_full_duplex(enum netdev_features features)
816 return (features & (NETDEV_F_10MB_FD | NETDEV_F_100MB_FD | NETDEV_F_1GB_FD
817 | NETDEV_F_10GB_FD | NETDEV_F_40GB_FD
818 | NETDEV_F_100GB_FD | NETDEV_F_1TB_FD)) != 0;
821 /* Set the features advertised by 'netdev' to 'advertise'. Returns 0 if
822 * successful, otherwise a positive errno value. */
824 netdev_set_advertisements(struct netdev *netdev,
825 enum netdev_features advertise)
827 return (netdev->netdev_class->set_advertisements
828 ? netdev->netdev_class->set_advertisements(
833 /* If 'netdev' has an assigned IPv4 address, sets '*address' to that address
834 * and '*netmask' to its netmask and returns 0. Otherwise, returns a positive
835 * errno value and sets '*address' to 0 (INADDR_ANY).
837 * The following error values have well-defined meanings:
839 * - EADDRNOTAVAIL: 'netdev' has no assigned IPv4 address.
841 * - EOPNOTSUPP: No IPv4 network stack attached to 'netdev'.
843 * 'address' or 'netmask' or both may be null, in which case the address or
844 * netmask is not reported. */
846 netdev_get_in4(const struct netdev *netdev,
847 struct in_addr *address_, struct in_addr *netmask_)
849 struct in_addr address;
850 struct in_addr netmask;
853 error = (netdev->netdev_class->get_in4
854 ? netdev->netdev_class->get_in4(netdev,
858 address_->s_addr = error ? 0 : address.s_addr;
861 netmask_->s_addr = error ? 0 : netmask.s_addr;
866 /* Assigns 'addr' as 'netdev''s IPv4 address and 'mask' as its netmask. If
867 * 'addr' is INADDR_ANY, 'netdev''s IPv4 address is cleared. Returns a
868 * positive errno value. */
870 netdev_set_in4(struct netdev *netdev, struct in_addr addr, struct in_addr mask)
872 return (netdev->netdev_class->set_in4
873 ? netdev->netdev_class->set_in4(netdev, addr, mask)
877 /* Obtains ad IPv4 address from device name and save the address in
878 * in4. Returns 0 if successful, otherwise a positive errno value.
881 netdev_get_in4_by_name(const char *device_name, struct in_addr *in4)
883 struct netdev *netdev;
886 error = netdev_open(device_name, "system", &netdev);
888 in4->s_addr = htonl(0);
892 error = netdev_get_in4(netdev, in4, NULL);
893 netdev_close(netdev);
897 /* Adds 'router' as a default IP gateway for the TCP/IP stack that corresponds
900 netdev_add_router(struct netdev *netdev, struct in_addr router)
902 COVERAGE_INC(netdev_add_router);
903 return (netdev->netdev_class->add_router
904 ? netdev->netdev_class->add_router(netdev, router)
908 /* Looks up the next hop for 'host' for the TCP/IP stack that corresponds to
909 * 'netdev'. If a route cannot not be determined, sets '*next_hop' to 0,
910 * '*netdev_name' to null, and returns a positive errno value. Otherwise, if a
911 * next hop is found, stores the next hop gateway's address (0 if 'host' is on
912 * a directly connected network) in '*next_hop' and a copy of the name of the
913 * device to reach 'host' in '*netdev_name', and returns 0. The caller is
914 * responsible for freeing '*netdev_name' (by calling free()). */
916 netdev_get_next_hop(const struct netdev *netdev,
917 const struct in_addr *host, struct in_addr *next_hop,
920 int error = (netdev->netdev_class->get_next_hop
921 ? netdev->netdev_class->get_next_hop(
922 host, next_hop, netdev_name)
925 next_hop->s_addr = 0;
931 /* Populates 'smap' with status information.
933 * Populates 'smap' with 'netdev' specific status information. This
934 * information may be used to populate the status column of the Interface table
935 * as defined in ovs-vswitchd.conf.db(5). */
937 netdev_get_status(const struct netdev *netdev, struct smap *smap)
939 return (netdev->netdev_class->get_status
940 ? netdev->netdev_class->get_status(netdev, smap)
944 /* If 'netdev' has an assigned IPv6 address, sets '*in6' to that address and
945 * returns 0. Otherwise, returns a positive errno value and sets '*in6' to
946 * all-zero-bits (in6addr_any).
948 * The following error values have well-defined meanings:
950 * - EADDRNOTAVAIL: 'netdev' has no assigned IPv6 address.
952 * - EOPNOTSUPP: No IPv6 network stack attached to 'netdev'.
954 * 'in6' may be null, in which case the address itself is not reported. */
956 netdev_get_in6(const struct netdev *netdev, struct in6_addr *in6)
958 struct in6_addr dummy;
961 error = (netdev->netdev_class->get_in6
962 ? netdev->netdev_class->get_in6(netdev,
966 memset(in6, 0, sizeof *in6);
971 /* On 'netdev', turns off the flags in 'off' and then turns on the flags in
972 * 'on'. Returns 0 if successful, otherwise a positive errno value. */
974 do_update_flags(struct netdev *netdev, enum netdev_flags off,
975 enum netdev_flags on, enum netdev_flags *old_flagsp,
976 struct netdev_saved_flags **sfp)
977 OVS_EXCLUDED(netdev_mutex)
979 struct netdev_saved_flags *sf = NULL;
980 enum netdev_flags old_flags;
983 error = netdev->netdev_class->update_flags(netdev, off & ~on, on,
986 VLOG_WARN_RL(&rl, "failed to %s flags for network device %s: %s",
987 off || on ? "set" : "get", netdev_get_name(netdev),
988 ovs_strerror(error));
990 } else if ((off || on) && sfp) {
991 enum netdev_flags new_flags = (old_flags & ~off) | on;
992 enum netdev_flags changed_flags = old_flags ^ new_flags;
994 ovs_mutex_lock(&netdev_mutex);
995 *sfp = sf = xmalloc(sizeof *sf);
997 list_push_front(&netdev->saved_flags_list, &sf->node);
998 sf->saved_flags = changed_flags;
999 sf->saved_values = changed_flags & new_flags;
1002 ovs_mutex_unlock(&netdev_mutex);
1007 *old_flagsp = old_flags;
1016 /* Obtains the current flags for 'netdev' and stores them into '*flagsp'.
1017 * Returns 0 if successful, otherwise a positive errno value. On failure,
1018 * stores 0 into '*flagsp'. */
1020 netdev_get_flags(const struct netdev *netdev_, enum netdev_flags *flagsp)
1022 struct netdev *netdev = CONST_CAST(struct netdev *, netdev_);
1023 return do_update_flags(netdev, 0, 0, flagsp, NULL);
1026 /* Sets the flags for 'netdev' to 'flags'.
1027 * Returns 0 if successful, otherwise a positive errno value. */
1029 netdev_set_flags(struct netdev *netdev, enum netdev_flags flags,
1030 struct netdev_saved_flags **sfp)
1032 return do_update_flags(netdev, -1, flags, NULL, sfp);
1035 /* Turns on the specified 'flags' on 'netdev':
1037 * - On success, returns 0. If 'sfp' is nonnull, sets '*sfp' to a newly
1038 * allocated 'struct netdev_saved_flags *' that may be passed to
1039 * netdev_restore_flags() to restore the original values of 'flags' on
1040 * 'netdev' (this will happen automatically at program termination if
1041 * netdev_restore_flags() is never called) , or to NULL if no flags were
1044 * - On failure, returns a positive errno value. If 'sfp' is nonnull, sets
1045 * '*sfp' to NULL. */
1047 netdev_turn_flags_on(struct netdev *netdev, enum netdev_flags flags,
1048 struct netdev_saved_flags **sfp)
1050 return do_update_flags(netdev, 0, flags, NULL, sfp);
1053 /* Turns off the specified 'flags' on 'netdev'. See netdev_turn_flags_on() for
1054 * details of the interface. */
1056 netdev_turn_flags_off(struct netdev *netdev, enum netdev_flags flags,
1057 struct netdev_saved_flags **sfp)
1059 return do_update_flags(netdev, flags, 0, NULL, sfp);
1062 /* Restores the flags that were saved in 'sf', and destroys 'sf'.
1063 * Does nothing if 'sf' is NULL. */
1065 netdev_restore_flags(struct netdev_saved_flags *sf)
1066 OVS_EXCLUDED(netdev_mutex)
1069 struct netdev *netdev = sf->netdev;
1070 enum netdev_flags old_flags;
1072 netdev->netdev_class->update_flags(netdev,
1073 sf->saved_flags & sf->saved_values,
1074 sf->saved_flags & ~sf->saved_values,
1077 ovs_mutex_lock(&netdev_mutex);
1078 list_remove(&sf->node);
1080 netdev_unref(netdev);
1084 /* Looks up the ARP table entry for 'ip' on 'netdev'. If one exists and can be
1085 * successfully retrieved, it stores the corresponding MAC address in 'mac' and
1086 * returns 0. Otherwise, it returns a positive errno value; in particular,
1087 * ENXIO indicates that there is no ARP table entry for 'ip' on 'netdev'. */
1089 netdev_arp_lookup(const struct netdev *netdev,
1090 ovs_be32 ip, uint8_t mac[ETH_ADDR_LEN])
1092 int error = (netdev->netdev_class->arp_lookup
1093 ? netdev->netdev_class->arp_lookup(netdev, ip, mac)
1096 memset(mac, 0, ETH_ADDR_LEN);
1101 /* Returns true if carrier is active (link light is on) on 'netdev'. */
1103 netdev_get_carrier(const struct netdev *netdev)
1106 enum netdev_flags flags;
1109 netdev_get_flags(netdev, &flags);
1110 if (!(flags & NETDEV_UP)) {
1114 if (!netdev->netdev_class->get_carrier) {
1118 error = netdev->netdev_class->get_carrier(netdev, &carrier);
1120 VLOG_DBG("%s: failed to get network device carrier status, assuming "
1121 "down: %s", netdev_get_name(netdev), ovs_strerror(error));
1128 /* Returns the number of times 'netdev''s carrier has changed. */
1130 netdev_get_carrier_resets(const struct netdev *netdev)
1132 return (netdev->netdev_class->get_carrier_resets
1133 ? netdev->netdev_class->get_carrier_resets(netdev)
1137 /* Attempts to force netdev_get_carrier() to poll 'netdev''s MII registers for
1138 * link status instead of checking 'netdev''s carrier. 'netdev''s MII
1139 * registers will be polled once ever 'interval' milliseconds. If 'netdev'
1140 * does not support MII, another method may be used as a fallback. If
1141 * 'interval' is less than or equal to zero, reverts netdev_get_carrier() to
1142 * its normal behavior.
1144 * Returns 0 if successful, otherwise a positive errno value. */
1146 netdev_set_miimon_interval(struct netdev *netdev, long long int interval)
1148 return (netdev->netdev_class->set_miimon_interval
1149 ? netdev->netdev_class->set_miimon_interval(netdev, interval)
1153 /* Retrieves current device stats for 'netdev'. */
1155 netdev_get_stats(const struct netdev *netdev, struct netdev_stats *stats)
1159 COVERAGE_INC(netdev_get_stats);
1160 error = (netdev->netdev_class->get_stats
1161 ? netdev->netdev_class->get_stats(netdev, stats)
1164 memset(stats, 0xff, sizeof *stats);
1169 /* Attempts to change the stats for 'netdev' to those provided in 'stats'.
1170 * Returns 0 if successful, otherwise a positive errno value.
1172 * This will probably fail for most network devices. Some devices might only
1173 * allow setting their stats to 0. */
1175 netdev_set_stats(struct netdev *netdev, const struct netdev_stats *stats)
1177 return (netdev->netdev_class->set_stats
1178 ? netdev->netdev_class->set_stats(netdev, stats)
1182 /* Attempts to set input rate limiting (policing) policy, such that up to
1183 * 'kbits_rate' kbps of traffic is accepted, with a maximum accumulative burst
1184 * size of 'kbits' kb. */
1186 netdev_set_policing(struct netdev *netdev, uint32_t kbits_rate,
1187 uint32_t kbits_burst)
1189 return (netdev->netdev_class->set_policing
1190 ? netdev->netdev_class->set_policing(netdev,
1191 kbits_rate, kbits_burst)
1195 /* Adds to 'types' all of the forms of QoS supported by 'netdev', or leaves it
1196 * empty if 'netdev' does not support QoS. Any names added to 'types' should
1197 * be documented as valid for the "type" column in the "QoS" table in
1198 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1200 * Every network device supports disabling QoS with a type of "", but this type
1201 * will not be added to 'types'.
1203 * The caller must initialize 'types' (e.g. with sset_init()) before calling
1204 * this function. The caller is responsible for destroying 'types' (e.g. with
1205 * sset_destroy()) when it is no longer needed.
1207 * Returns 0 if successful, otherwise a positive errno value. */
1209 netdev_get_qos_types(const struct netdev *netdev, struct sset *types)
1211 const struct netdev_class *class = netdev->netdev_class;
1212 return (class->get_qos_types
1213 ? class->get_qos_types(netdev, types)
1217 /* Queries 'netdev' for its capabilities regarding the specified 'type' of QoS,
1218 * which should be "" or one of the types returned by netdev_get_qos_types()
1219 * for 'netdev'. Returns 0 if successful, otherwise a positive errno value.
1220 * On success, initializes 'caps' with the QoS capabilities; on failure, clears
1221 * 'caps' to all zeros. */
1223 netdev_get_qos_capabilities(const struct netdev *netdev, const char *type,
1224 struct netdev_qos_capabilities *caps)
1226 const struct netdev_class *class = netdev->netdev_class;
1229 int retval = (class->get_qos_capabilities
1230 ? class->get_qos_capabilities(netdev, type, caps)
1233 memset(caps, 0, sizeof *caps);
1237 /* Every netdev supports turning off QoS. */
1238 memset(caps, 0, sizeof *caps);
1243 /* Obtains the number of queues supported by 'netdev' for the specified 'type'
1244 * of QoS. Returns 0 if successful, otherwise a positive errno value. Stores
1245 * the number of queues (zero on failure) in '*n_queuesp'.
1247 * This is just a simple wrapper around netdev_get_qos_capabilities(). */
1249 netdev_get_n_queues(const struct netdev *netdev,
1250 const char *type, unsigned int *n_queuesp)
1252 struct netdev_qos_capabilities caps;
1255 retval = netdev_get_qos_capabilities(netdev, type, &caps);
1256 *n_queuesp = caps.n_queues;
1260 /* Queries 'netdev' about its currently configured form of QoS. If successful,
1261 * stores the name of the current form of QoS into '*typep', stores any details
1262 * of configuration as string key-value pairs in 'details', and returns 0. On
1263 * failure, sets '*typep' to NULL and returns a positive errno value.
1265 * A '*typep' of "" indicates that QoS is currently disabled on 'netdev'.
1267 * The caller must initialize 'details' as an empty smap (e.g. with
1268 * smap_init()) before calling this function. The caller must free 'details'
1269 * when it is no longer needed (e.g. with smap_destroy()).
1271 * The caller must not modify or free '*typep'.
1273 * '*typep' will be one of the types returned by netdev_get_qos_types() for
1274 * 'netdev'. The contents of 'details' should be documented as valid for
1275 * '*typep' in the "other_config" column in the "QoS" table in
1276 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)). */
1278 netdev_get_qos(const struct netdev *netdev,
1279 const char **typep, struct smap *details)
1281 const struct netdev_class *class = netdev->netdev_class;
1284 if (class->get_qos) {
1285 retval = class->get_qos(netdev, typep, details);
1288 smap_clear(details);
1292 /* 'netdev' doesn't support QoS, so report that QoS is disabled. */
1298 /* Attempts to reconfigure QoS on 'netdev', changing the form of QoS to 'type'
1299 * with details of configuration from 'details'. Returns 0 if successful,
1300 * otherwise a positive errno value. On error, the previous QoS configuration
1303 * When this function changes the type of QoS (not just 'details'), this also
1304 * resets all queue configuration for 'netdev' to their defaults (which depend
1305 * on the specific type of QoS). Otherwise, the queue configuration for
1306 * 'netdev' is unchanged.
1308 * 'type' should be "" (to disable QoS) or one of the types returned by
1309 * netdev_get_qos_types() for 'netdev'. The contents of 'details' should be
1310 * documented as valid for the given 'type' in the "other_config" column in the
1311 * "QoS" table in vswitchd/vswitch.xml (which is built as
1312 * ovs-vswitchd.conf.db(8)).
1314 * NULL may be specified for 'details' if there are no configuration
1317 netdev_set_qos(struct netdev *netdev,
1318 const char *type, const struct smap *details)
1320 const struct netdev_class *class = netdev->netdev_class;
1326 if (class->set_qos) {
1328 static const struct smap empty = SMAP_INITIALIZER(&empty);
1331 return class->set_qos(netdev, type, details);
1333 return *type ? EOPNOTSUPP : 0;
1337 /* Queries 'netdev' for information about the queue numbered 'queue_id'. If
1338 * successful, adds that information as string key-value pairs to 'details'.
1339 * Returns 0 if successful, otherwise a positive errno value.
1341 * 'queue_id' must be less than the number of queues supported by 'netdev' for
1342 * the current form of QoS (e.g. as returned by netdev_get_n_queues(netdev)).
1344 * The returned contents of 'details' should be documented as valid for the
1345 * given 'type' in the "other_config" column in the "Queue" table in
1346 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1348 * The caller must initialize 'details' (e.g. with smap_init()) before calling
1349 * this function. The caller must free 'details' when it is no longer needed
1350 * (e.g. with smap_destroy()). */
1352 netdev_get_queue(const struct netdev *netdev,
1353 unsigned int queue_id, struct smap *details)
1355 const struct netdev_class *class = netdev->netdev_class;
1358 retval = (class->get_queue
1359 ? class->get_queue(netdev, queue_id, details)
1362 smap_clear(details);
1367 /* Configures the queue numbered 'queue_id' on 'netdev' with the key-value
1368 * string pairs in 'details'. The contents of 'details' should be documented
1369 * as valid for the given 'type' in the "other_config" column in the "Queue"
1370 * table in vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1371 * Returns 0 if successful, otherwise a positive errno value. On failure, the
1372 * given queue's configuration should be unmodified.
1374 * 'queue_id' must be less than the number of queues supported by 'netdev' for
1375 * the current form of QoS (e.g. as returned by netdev_get_n_queues(netdev)).
1377 * This function does not modify 'details', and the caller retains ownership of
1380 netdev_set_queue(struct netdev *netdev,
1381 unsigned int queue_id, const struct smap *details)
1383 const struct netdev_class *class = netdev->netdev_class;
1384 return (class->set_queue
1385 ? class->set_queue(netdev, queue_id, details)
1389 /* Attempts to delete the queue numbered 'queue_id' from 'netdev'. Some kinds
1390 * of QoS may have a fixed set of queues, in which case attempts to delete them
1391 * will fail with EOPNOTSUPP.
1393 * Returns 0 if successful, otherwise a positive errno value. On failure, the
1394 * given queue will be unmodified.
1396 * 'queue_id' must be less than the number of queues supported by 'netdev' for
1397 * the current form of QoS (e.g. as returned by
1398 * netdev_get_n_queues(netdev)). */
1400 netdev_delete_queue(struct netdev *netdev, unsigned int queue_id)
1402 const struct netdev_class *class = netdev->netdev_class;
1403 return (class->delete_queue
1404 ? class->delete_queue(netdev, queue_id)
1408 /* Obtains statistics about 'queue_id' on 'netdev'. On success, returns 0 and
1409 * fills 'stats' with the queue's statistics; individual members of 'stats' may
1410 * be set to all-1-bits if the statistic is unavailable. On failure, returns a
1411 * positive errno value and fills 'stats' with values indicating unsupported
1414 netdev_get_queue_stats(const struct netdev *netdev, unsigned int queue_id,
1415 struct netdev_queue_stats *stats)
1417 const struct netdev_class *class = netdev->netdev_class;
1420 retval = (class->get_queue_stats
1421 ? class->get_queue_stats(netdev, queue_id, stats)
1424 stats->tx_bytes = UINT64_MAX;
1425 stats->tx_packets = UINT64_MAX;
1426 stats->tx_errors = UINT64_MAX;
1427 stats->created = LLONG_MIN;
1432 /* Initializes 'dump' to begin dumping the queues in a netdev.
1434 * This function provides no status indication. An error status for the entire
1435 * dump operation is provided when it is completed by calling
1436 * netdev_queue_dump_done().
1439 netdev_queue_dump_start(struct netdev_queue_dump *dump,
1440 const struct netdev *netdev)
1442 dump->netdev = netdev_ref(netdev);
1443 if (netdev->netdev_class->queue_dump_start) {
1444 dump->error = netdev->netdev_class->queue_dump_start(netdev,
1447 dump->error = EOPNOTSUPP;
1451 /* Attempts to retrieve another queue from 'dump', which must have been
1452 * initialized with netdev_queue_dump_start(). On success, stores a new queue
1453 * ID into '*queue_id', fills 'details' with configuration details for the
1454 * queue, and returns true. On failure, returns false.
1456 * Queues are not necessarily dumped in increasing order of queue ID (or any
1457 * other predictable order).
1459 * Failure might indicate an actual error or merely that the last queue has
1460 * been dumped. An error status for the entire dump operation is provided when
1461 * it is completed by calling netdev_queue_dump_done().
1463 * The returned contents of 'details' should be documented as valid for the
1464 * given 'type' in the "other_config" column in the "Queue" table in
1465 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1467 * The caller must initialize 'details' (e.g. with smap_init()) before calling
1468 * this function. This function will clear and replace its contents. The
1469 * caller must free 'details' when it is no longer needed (e.g. with
1470 * smap_destroy()). */
1472 netdev_queue_dump_next(struct netdev_queue_dump *dump,
1473 unsigned int *queue_id, struct smap *details)
1475 const struct netdev *netdev = dump->netdev;
1481 dump->error = netdev->netdev_class->queue_dump_next(netdev, dump->state,
1485 netdev->netdev_class->queue_dump_done(netdev, dump->state);
1491 /* Completes queue table dump operation 'dump', which must have been
1492 * initialized with netdev_queue_dump_start(). Returns 0 if the dump operation
1493 * was error-free, otherwise a positive errno value describing the problem. */
1495 netdev_queue_dump_done(struct netdev_queue_dump *dump)
1497 const struct netdev *netdev = dump->netdev;
1498 if (!dump->error && netdev->netdev_class->queue_dump_done) {
1499 dump->error = netdev->netdev_class->queue_dump_done(netdev,
1502 netdev_close(dump->netdev);
1503 return dump->error == EOF ? 0 : dump->error;
1506 /* Iterates over all of 'netdev''s queues, calling 'cb' with the queue's ID,
1507 * its statistics, and the 'aux' specified by the caller. The order of
1508 * iteration is unspecified, but (when successful) each queue is visited
1511 * Calling this function may be more efficient than calling
1512 * netdev_get_queue_stats() for every queue.
1514 * 'cb' must not modify or free the statistics passed in.
1516 * Returns 0 if successful, otherwise a positive errno value. On error, some
1517 * configured queues may not have been included in the iteration. */
1519 netdev_dump_queue_stats(const struct netdev *netdev,
1520 netdev_dump_queue_stats_cb *cb, void *aux)
1522 const struct netdev_class *class = netdev->netdev_class;
1523 return (class->dump_queue_stats
1524 ? class->dump_queue_stats(netdev, cb, aux)
1529 /* Returns the class type of 'netdev'.
1531 * The caller must not free the returned value. */
1533 netdev_get_type(const struct netdev *netdev)
1535 return netdev->netdev_class->type;
1538 /* Returns the class associated with 'netdev'. */
1539 const struct netdev_class *
1540 netdev_get_class(const struct netdev *netdev)
1542 return netdev->netdev_class;
1545 /* Returns the netdev with 'name' or NULL if there is none.
1547 * The caller must free the returned netdev with netdev_close(). */
1549 netdev_from_name(const char *name)
1550 OVS_EXCLUDED(netdev_mutex)
1552 struct netdev *netdev;
1554 ovs_mutex_lock(&netdev_mutex);
1555 netdev = shash_find_data(&netdev_shash, name);
1559 ovs_mutex_unlock(&netdev_mutex);
1564 /* Fills 'device_list' with devices that match 'netdev_class'.
1566 * The caller is responsible for initializing and destroying 'device_list' and
1567 * must close each device on the list. */
1569 netdev_get_devices(const struct netdev_class *netdev_class,
1570 struct shash *device_list)
1571 OVS_EXCLUDED(netdev_mutex)
1573 struct shash_node *node;
1575 ovs_mutex_lock(&netdev_mutex);
1576 SHASH_FOR_EACH (node, &netdev_shash) {
1577 struct netdev *dev = node->data;
1579 if (dev->netdev_class == netdev_class) {
1581 shash_add(device_list, node->name, node->data);
1584 ovs_mutex_unlock(&netdev_mutex);
1588 netdev_get_type_from_name(const char *name)
1590 struct netdev *dev = netdev_from_name(name);
1591 const char *type = dev ? netdev_get_type(dev) : NULL;
1597 netdev_rxq_get_netdev(const struct netdev_rxq *rx)
1599 ovs_assert(rx->netdev->ref_cnt > 0);
1604 netdev_rxq_get_name(const struct netdev_rxq *rx)
1606 return netdev_get_name(netdev_rxq_get_netdev(rx));
1610 restore_all_flags(void *aux OVS_UNUSED)
1612 struct shash_node *node;
1614 SHASH_FOR_EACH (node, &netdev_shash) {
1615 struct netdev *netdev = node->data;
1616 const struct netdev_saved_flags *sf;
1617 enum netdev_flags saved_values;
1618 enum netdev_flags saved_flags;
1620 saved_values = saved_flags = 0;
1621 LIST_FOR_EACH (sf, node, &netdev->saved_flags_list) {
1622 saved_flags |= sf->saved_flags;
1623 saved_values &= ~sf->saved_flags;
1624 saved_values |= sf->saved_flags & sf->saved_values;
1627 enum netdev_flags old_flags;
1629 netdev->netdev_class->update_flags(netdev,
1630 saved_flags & saved_values,
1631 saved_flags & ~saved_values,