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_n_rxq(const struct netdev *netdev)
100 netdev_is_pmd(const struct netdev *netdev)
102 return !strcmp(netdev->netdev_class->type, "dpdk");
106 netdev_initialize(void)
107 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
109 static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
111 if (ovsthread_once_start(&once)) {
112 ovs_mutex_init_recursive(&netdev_class_mutex);
114 fatal_signal_add_hook(restore_all_flags, NULL, NULL, true);
115 netdev_vport_patch_register();
118 netdev_register_provider(&netdev_linux_class);
119 netdev_register_provider(&netdev_internal_class);
120 netdev_register_provider(&netdev_tap_class);
121 netdev_vport_tunnel_register();
123 #if defined(__FreeBSD__) || defined(__NetBSD__)
124 netdev_register_provider(&netdev_tap_class);
125 netdev_register_provider(&netdev_bsd_class);
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->node = shash_add(&netdev_shash, name, netdev);
343 /* By default enable one rx queue per netdev. */
344 if (netdev->netdev_class->rxq_alloc) {
349 list_init(&netdev->saved_flags_list);
351 error = rc->class->construct(netdev);
355 atomic_add(&rc->ref_cnt, 1, &old_ref_cnt);
356 seq_change(connectivity_seq_get());
359 ovs_assert(list_is_empty(&netdev->saved_flags_list));
360 shash_delete(&netdev_shash, netdev->node);
361 rc->class->dealloc(netdev);
367 VLOG_WARN("could not create netdev %s of unknown type %s",
369 error = EAFNOSUPPORT;
375 ovs_mutex_unlock(&netdev_mutex);
376 ovs_mutex_unlock(&netdev_class_mutex);
387 /* Returns a reference to 'netdev_' for the caller to own. Returns null if
388 * 'netdev_' is null. */
390 netdev_ref(const struct netdev *netdev_)
391 OVS_EXCLUDED(netdev_mutex)
393 struct netdev *netdev = CONST_CAST(struct netdev *, netdev_);
396 ovs_mutex_lock(&netdev_mutex);
397 ovs_assert(netdev->ref_cnt > 0);
399 ovs_mutex_unlock(&netdev_mutex);
404 /* Reconfigures the device 'netdev' with 'args'. 'args' may be empty
405 * or NULL if none are needed. */
407 netdev_set_config(struct netdev *netdev, const struct smap *args)
408 OVS_EXCLUDED(netdev_mutex)
410 if (netdev->netdev_class->set_config) {
411 const struct smap no_args = SMAP_INITIALIZER(&no_args);
414 error = netdev->netdev_class->set_config(netdev,
415 args ? args : &no_args);
417 VLOG_WARN("%s: could not set configuration (%s)",
418 netdev_get_name(netdev), ovs_strerror(error));
421 } else if (args && !smap_is_empty(args)) {
422 VLOG_WARN("%s: arguments provided to device that is not configurable",
423 netdev_get_name(netdev));
428 /* Returns the current configuration for 'netdev' in 'args'. The caller must
429 * have already initialized 'args' with smap_init(). Returns 0 on success, in
430 * which case 'args' will be filled with 'netdev''s configuration. On failure
431 * returns a positive errno value, in which case 'args' will be empty.
433 * The caller owns 'args' and its contents and must eventually free them with
436 netdev_get_config(const struct netdev *netdev, struct smap *args)
437 OVS_EXCLUDED(netdev_mutex)
442 if (netdev->netdev_class->get_config) {
443 error = netdev->netdev_class->get_config(netdev, args);
454 const struct netdev_tunnel_config *
455 netdev_get_tunnel_config(const struct netdev *netdev)
456 OVS_EXCLUDED(netdev_mutex)
458 if (netdev->netdev_class->get_tunnel_config) {
459 return netdev->netdev_class->get_tunnel_config(netdev);
466 netdev_unref(struct netdev *dev)
467 OVS_RELEASES(netdev_mutex)
469 ovs_assert(dev->ref_cnt);
470 if (!--dev->ref_cnt) {
471 const struct netdev_class *class = dev->netdev_class;
472 struct netdev_registered_class *rc;
475 dev->netdev_class->destruct(dev);
477 shash_delete(&netdev_shash, dev->node);
479 dev->netdev_class->dealloc(dev);
480 ovs_mutex_unlock(&netdev_mutex);
482 ovs_mutex_lock(&netdev_class_mutex);
483 rc = netdev_lookup_class(class->type);
484 atomic_sub(&rc->ref_cnt, 1, &old_ref_cnt);
485 ovs_assert(old_ref_cnt > 0);
486 ovs_mutex_unlock(&netdev_class_mutex);
488 ovs_mutex_unlock(&netdev_mutex);
492 /* Closes and destroys 'netdev'. */
494 netdev_close(struct netdev *netdev)
495 OVS_EXCLUDED(netdev_mutex)
498 ovs_mutex_lock(&netdev_mutex);
499 netdev_unref(netdev);
503 /* Parses 'netdev_name_', which is of the form [type@]name into its component
504 * pieces. 'name' and 'type' must be freed by the caller. */
506 netdev_parse_name(const char *netdev_name_, char **name, char **type)
508 char *netdev_name = xstrdup(netdev_name_);
511 separator = strchr(netdev_name, '@');
515 *name = xstrdup(separator + 1);
518 *type = xstrdup("system");
522 /* Attempts to open a netdev_rxq handle for obtaining packets received on
523 * 'netdev'. On success, returns 0 and stores a nonnull 'netdev_rxq *' into
524 * '*rxp'. On failure, returns a positive errno value and stores NULL into
527 * Some kinds of network devices might not support receiving packets. This
528 * function returns EOPNOTSUPP in that case.*/
530 netdev_rxq_open(struct netdev *netdev, struct netdev_rxq **rxp, int id)
531 OVS_EXCLUDED(netdev_mutex)
535 if (netdev->netdev_class->rxq_alloc && id < netdev->n_rxq) {
536 struct netdev_rxq *rx = netdev->netdev_class->rxq_alloc();
540 error = netdev->netdev_class->rxq_construct(rx);
542 ovs_mutex_lock(&netdev_mutex);
544 ovs_mutex_unlock(&netdev_mutex);
549 netdev->netdev_class->rxq_dealloc(rx);
563 netdev_rxq_close(struct netdev_rxq *rx)
564 OVS_EXCLUDED(netdev_mutex)
567 struct netdev *netdev = rx->netdev;
568 netdev->netdev_class->rxq_destruct(rx);
569 netdev->netdev_class->rxq_dealloc(rx);
570 netdev_close(netdev);
574 /* Attempts to receive batch of packets from 'rx'.
576 * Returns EAGAIN immediately if no packet is ready to be received.
578 * Returns EMSGSIZE, and discards the packet, if the received packet is longer
579 * than 'ofpbuf_tailroom(buffer)'.
581 * It is advised that the tailroom of 'buffer' should be
582 * VLAN_HEADER_LEN bytes longer than the MTU to allow space for an
583 * out-of-band VLAN header to be added to the packet. At the very least,
584 * 'buffer' must have at least ETH_TOTAL_MIN bytes of tailroom.
586 * This function may be set to null if it would always return EOPNOTSUPP
589 netdev_rxq_recv(struct netdev_rxq *rx, struct ofpbuf **buffers, int *cnt)
593 retval = rx->netdev->netdev_class->rxq_recv(rx, buffers, cnt);
595 COVERAGE_INC(netdev_received);
600 /* Arranges for poll_block() to wake up when a packet is ready to be received
603 netdev_rxq_wait(struct netdev_rxq *rx)
605 rx->netdev->netdev_class->rxq_wait(rx);
608 /* Discards any packets ready to be received on 'rx'. */
610 netdev_rxq_drain(struct netdev_rxq *rx)
612 return (rx->netdev->netdev_class->rxq_drain
613 ? rx->netdev->netdev_class->rxq_drain(rx)
617 /* Sends 'buffer' on 'netdev'. Returns 0 if successful, otherwise a positive
618 * errno value. Returns EAGAIN without blocking if the packet cannot be queued
619 * immediately. Returns EMSGSIZE if a partial packet was transmitted or if
620 * the packet is too big or too small to transmit on the device.
622 * To retain ownership of 'buffer' caller can set may_steal to false.
624 * The kernel maintains a packet transmission queue, so the caller is not
625 * expected to do additional queuing of packets.
627 * Some network devices may not implement support for this function. In such
628 * cases this function will always return EOPNOTSUPP. */
630 netdev_send(struct netdev *netdev, struct ofpbuf *buffer, bool may_steal)
634 error = (netdev->netdev_class->send
635 ? netdev->netdev_class->send(netdev, buffer, may_steal)
638 COVERAGE_INC(netdev_sent);
643 /* Registers with the poll loop to wake up from the next call to poll_block()
644 * when the packet transmission queue has sufficient room to transmit a packet
645 * with netdev_send().
647 * The kernel maintains a packet transmission queue, so the client is not
648 * expected to do additional queuing of packets. Thus, this function is
649 * unlikely to ever be used. It is included for completeness. */
651 netdev_send_wait(struct netdev *netdev)
653 if (netdev->netdev_class->send_wait) {
654 netdev->netdev_class->send_wait(netdev);
658 /* Attempts to set 'netdev''s MAC address to 'mac'. Returns 0 if successful,
659 * otherwise a positive errno value. */
661 netdev_set_etheraddr(struct netdev *netdev, const uint8_t mac[ETH_ADDR_LEN])
663 return netdev->netdev_class->set_etheraddr(netdev, mac);
666 /* Retrieves 'netdev''s MAC address. If successful, returns 0 and copies the
667 * the MAC address into 'mac'. On failure, returns a positive errno value and
668 * clears 'mac' to all-zeros. */
670 netdev_get_etheraddr(const struct netdev *netdev, uint8_t mac[ETH_ADDR_LEN])
672 return netdev->netdev_class->get_etheraddr(netdev, mac);
675 /* Returns the name of the network device that 'netdev' represents,
676 * e.g. "eth0". The caller must not modify or free the returned string. */
678 netdev_get_name(const struct netdev *netdev)
683 /* Retrieves the MTU of 'netdev'. The MTU is the maximum size of transmitted
684 * (and received) packets, in bytes, not including the hardware header; thus,
685 * this is typically 1500 bytes for Ethernet devices.
687 * If successful, returns 0 and stores the MTU size in '*mtup'. Returns
688 * EOPNOTSUPP if 'netdev' does not have an MTU (as e.g. some tunnels do not).
689 * On other failure, returns a positive errno value. On failure, sets '*mtup'
692 netdev_get_mtu(const struct netdev *netdev, int *mtup)
694 const struct netdev_class *class = netdev->netdev_class;
697 error = class->get_mtu ? class->get_mtu(netdev, mtup) : EOPNOTSUPP;
700 if (error != EOPNOTSUPP) {
701 VLOG_DBG_RL(&rl, "failed to retrieve MTU for network device %s: "
702 "%s", netdev_get_name(netdev), ovs_strerror(error));
708 /* Sets the MTU of 'netdev'. The MTU is the maximum size of transmitted
709 * (and received) packets, in bytes.
711 * If successful, returns 0. Returns EOPNOTSUPP if 'netdev' does not have an
712 * MTU (as e.g. some tunnels do not). On other failure, returns a positive
715 netdev_set_mtu(const struct netdev *netdev, int mtu)
717 const struct netdev_class *class = netdev->netdev_class;
720 error = class->set_mtu ? class->set_mtu(netdev, mtu) : EOPNOTSUPP;
721 if (error && error != EOPNOTSUPP) {
722 VLOG_DBG_RL(&rl, "failed to set MTU for network device %s: %s",
723 netdev_get_name(netdev), ovs_strerror(error));
729 /* Returns the ifindex of 'netdev', if successful, as a positive number. On
730 * failure, returns a negative errno value.
732 * The desired semantics of the ifindex value are a combination of those
733 * specified by POSIX for if_nametoindex() and by SNMP for ifIndex. An ifindex
734 * value should be unique within a host and remain stable at least until
735 * reboot. SNMP says an ifindex "ranges between 1 and the value of ifNumber"
736 * but many systems do not follow this rule anyhow.
738 * Some network devices may not implement support for this function. In such
739 * cases this function will always return -EOPNOTSUPP.
742 netdev_get_ifindex(const struct netdev *netdev)
744 int (*get_ifindex)(const struct netdev *);
746 get_ifindex = netdev->netdev_class->get_ifindex;
748 return get_ifindex ? get_ifindex(netdev) : -EOPNOTSUPP;
751 /* Stores the features supported by 'netdev' into each of '*current',
752 * '*advertised', '*supported', and '*peer' that are non-null. Each value is a
753 * bitmap of "enum ofp_port_features" bits, in host byte order. Returns 0 if
754 * successful, otherwise a positive errno value. On failure, all of the
755 * passed-in values are set to 0.
757 * Some network devices may not implement support for this function. In such
758 * cases this function will always return EOPNOTSUPP. */
760 netdev_get_features(const struct netdev *netdev,
761 enum netdev_features *current,
762 enum netdev_features *advertised,
763 enum netdev_features *supported,
764 enum netdev_features *peer)
766 int (*get_features)(const struct netdev *netdev,
767 enum netdev_features *current,
768 enum netdev_features *advertised,
769 enum netdev_features *supported,
770 enum netdev_features *peer);
771 enum netdev_features dummy[4];
778 advertised = &dummy[1];
781 supported = &dummy[2];
787 get_features = netdev->netdev_class->get_features;
789 ? get_features(netdev, current, advertised, supported,
793 *current = *advertised = *supported = *peer = 0;
798 /* Returns the maximum speed of a network connection that has the NETDEV_F_*
799 * bits in 'features', in bits per second. If no bits that indicate a speed
800 * are set in 'features', returns 'default_bps'. */
802 netdev_features_to_bps(enum netdev_features features,
803 uint64_t default_bps)
806 F_1000000MB = NETDEV_F_1TB_FD,
807 F_100000MB = NETDEV_F_100GB_FD,
808 F_40000MB = NETDEV_F_40GB_FD,
809 F_10000MB = NETDEV_F_10GB_FD,
810 F_1000MB = NETDEV_F_1GB_HD | NETDEV_F_1GB_FD,
811 F_100MB = NETDEV_F_100MB_HD | NETDEV_F_100MB_FD,
812 F_10MB = NETDEV_F_10MB_HD | NETDEV_F_10MB_FD
815 return ( features & F_1000000MB ? UINT64_C(1000000000000)
816 : features & F_100000MB ? UINT64_C(100000000000)
817 : features & F_40000MB ? UINT64_C(40000000000)
818 : features & F_10000MB ? UINT64_C(10000000000)
819 : features & F_1000MB ? UINT64_C(1000000000)
820 : features & F_100MB ? UINT64_C(100000000)
821 : features & F_10MB ? UINT64_C(10000000)
825 /* Returns true if any of the NETDEV_F_* bits that indicate a full-duplex link
826 * are set in 'features', otherwise false. */
828 netdev_features_is_full_duplex(enum netdev_features features)
830 return (features & (NETDEV_F_10MB_FD | NETDEV_F_100MB_FD | NETDEV_F_1GB_FD
831 | NETDEV_F_10GB_FD | NETDEV_F_40GB_FD
832 | NETDEV_F_100GB_FD | NETDEV_F_1TB_FD)) != 0;
835 /* Set the features advertised by 'netdev' to 'advertise'. Returns 0 if
836 * successful, otherwise a positive errno value. */
838 netdev_set_advertisements(struct netdev *netdev,
839 enum netdev_features advertise)
841 return (netdev->netdev_class->set_advertisements
842 ? netdev->netdev_class->set_advertisements(
847 /* If 'netdev' has an assigned IPv4 address, sets '*address' to that address
848 * and '*netmask' to its netmask and returns 0. Otherwise, returns a positive
849 * errno value and sets '*address' to 0 (INADDR_ANY).
851 * The following error values have well-defined meanings:
853 * - EADDRNOTAVAIL: 'netdev' has no assigned IPv4 address.
855 * - EOPNOTSUPP: No IPv4 network stack attached to 'netdev'.
857 * 'address' or 'netmask' or both may be null, in which case the address or
858 * netmask is not reported. */
860 netdev_get_in4(const struct netdev *netdev,
861 struct in_addr *address_, struct in_addr *netmask_)
863 struct in_addr address;
864 struct in_addr netmask;
867 error = (netdev->netdev_class->get_in4
868 ? netdev->netdev_class->get_in4(netdev,
872 address_->s_addr = error ? 0 : address.s_addr;
875 netmask_->s_addr = error ? 0 : netmask.s_addr;
880 /* Assigns 'addr' as 'netdev''s IPv4 address and 'mask' as its netmask. If
881 * 'addr' is INADDR_ANY, 'netdev''s IPv4 address is cleared. Returns a
882 * positive errno value. */
884 netdev_set_in4(struct netdev *netdev, struct in_addr addr, struct in_addr mask)
886 return (netdev->netdev_class->set_in4
887 ? netdev->netdev_class->set_in4(netdev, addr, mask)
891 /* Obtains ad IPv4 address from device name and save the address in
892 * in4. Returns 0 if successful, otherwise a positive errno value.
895 netdev_get_in4_by_name(const char *device_name, struct in_addr *in4)
897 struct netdev *netdev;
900 error = netdev_open(device_name, "system", &netdev);
902 in4->s_addr = htonl(0);
906 error = netdev_get_in4(netdev, in4, NULL);
907 netdev_close(netdev);
911 /* Adds 'router' as a default IP gateway for the TCP/IP stack that corresponds
914 netdev_add_router(struct netdev *netdev, struct in_addr router)
916 COVERAGE_INC(netdev_add_router);
917 return (netdev->netdev_class->add_router
918 ? netdev->netdev_class->add_router(netdev, router)
922 /* Looks up the next hop for 'host' for the TCP/IP stack that corresponds to
923 * 'netdev'. If a route cannot not be determined, sets '*next_hop' to 0,
924 * '*netdev_name' to null, and returns a positive errno value. Otherwise, if a
925 * next hop is found, stores the next hop gateway's address (0 if 'host' is on
926 * a directly connected network) in '*next_hop' and a copy of the name of the
927 * device to reach 'host' in '*netdev_name', and returns 0. The caller is
928 * responsible for freeing '*netdev_name' (by calling free()). */
930 netdev_get_next_hop(const struct netdev *netdev,
931 const struct in_addr *host, struct in_addr *next_hop,
934 int error = (netdev->netdev_class->get_next_hop
935 ? netdev->netdev_class->get_next_hop(
936 host, next_hop, netdev_name)
939 next_hop->s_addr = 0;
945 /* Populates 'smap' with status information.
947 * Populates 'smap' with 'netdev' specific status information. This
948 * information may be used to populate the status column of the Interface table
949 * as defined in ovs-vswitchd.conf.db(5). */
951 netdev_get_status(const struct netdev *netdev, struct smap *smap)
953 return (netdev->netdev_class->get_status
954 ? netdev->netdev_class->get_status(netdev, smap)
958 /* If 'netdev' has an assigned IPv6 address, sets '*in6' to that address and
959 * returns 0. Otherwise, returns a positive errno value and sets '*in6' to
960 * all-zero-bits (in6addr_any).
962 * The following error values have well-defined meanings:
964 * - EADDRNOTAVAIL: 'netdev' has no assigned IPv6 address.
966 * - EOPNOTSUPP: No IPv6 network stack attached to 'netdev'.
968 * 'in6' may be null, in which case the address itself is not reported. */
970 netdev_get_in6(const struct netdev *netdev, struct in6_addr *in6)
972 struct in6_addr dummy;
975 error = (netdev->netdev_class->get_in6
976 ? netdev->netdev_class->get_in6(netdev,
980 memset(in6, 0, sizeof *in6);
985 /* On 'netdev', turns off the flags in 'off' and then turns on the flags in
986 * 'on'. Returns 0 if successful, otherwise a positive errno value. */
988 do_update_flags(struct netdev *netdev, enum netdev_flags off,
989 enum netdev_flags on, enum netdev_flags *old_flagsp,
990 struct netdev_saved_flags **sfp)
991 OVS_EXCLUDED(netdev_mutex)
993 struct netdev_saved_flags *sf = NULL;
994 enum netdev_flags old_flags;
997 error = netdev->netdev_class->update_flags(netdev, off & ~on, on,
1000 VLOG_WARN_RL(&rl, "failed to %s flags for network device %s: %s",
1001 off || on ? "set" : "get", netdev_get_name(netdev),
1002 ovs_strerror(error));
1004 } else if ((off || on) && sfp) {
1005 enum netdev_flags new_flags = (old_flags & ~off) | on;
1006 enum netdev_flags changed_flags = old_flags ^ new_flags;
1007 if (changed_flags) {
1008 ovs_mutex_lock(&netdev_mutex);
1009 *sfp = sf = xmalloc(sizeof *sf);
1010 sf->netdev = netdev;
1011 list_push_front(&netdev->saved_flags_list, &sf->node);
1012 sf->saved_flags = changed_flags;
1013 sf->saved_values = changed_flags & new_flags;
1016 ovs_mutex_unlock(&netdev_mutex);
1021 *old_flagsp = old_flags;
1030 /* Obtains the current flags for 'netdev' and stores them into '*flagsp'.
1031 * Returns 0 if successful, otherwise a positive errno value. On failure,
1032 * stores 0 into '*flagsp'. */
1034 netdev_get_flags(const struct netdev *netdev_, enum netdev_flags *flagsp)
1036 struct netdev *netdev = CONST_CAST(struct netdev *, netdev_);
1037 return do_update_flags(netdev, 0, 0, flagsp, NULL);
1040 /* Sets the flags for 'netdev' to 'flags'.
1041 * Returns 0 if successful, otherwise a positive errno value. */
1043 netdev_set_flags(struct netdev *netdev, enum netdev_flags flags,
1044 struct netdev_saved_flags **sfp)
1046 return do_update_flags(netdev, -1, flags, NULL, sfp);
1049 /* Turns on the specified 'flags' on 'netdev':
1051 * - On success, returns 0. If 'sfp' is nonnull, sets '*sfp' to a newly
1052 * allocated 'struct netdev_saved_flags *' that may be passed to
1053 * netdev_restore_flags() to restore the original values of 'flags' on
1054 * 'netdev' (this will happen automatically at program termination if
1055 * netdev_restore_flags() is never called) , or to NULL if no flags were
1058 * - On failure, returns a positive errno value. If 'sfp' is nonnull, sets
1059 * '*sfp' to NULL. */
1061 netdev_turn_flags_on(struct netdev *netdev, enum netdev_flags flags,
1062 struct netdev_saved_flags **sfp)
1064 return do_update_flags(netdev, 0, flags, NULL, sfp);
1067 /* Turns off the specified 'flags' on 'netdev'. See netdev_turn_flags_on() for
1068 * details of the interface. */
1070 netdev_turn_flags_off(struct netdev *netdev, enum netdev_flags flags,
1071 struct netdev_saved_flags **sfp)
1073 return do_update_flags(netdev, flags, 0, NULL, sfp);
1076 /* Restores the flags that were saved in 'sf', and destroys 'sf'.
1077 * Does nothing if 'sf' is NULL. */
1079 netdev_restore_flags(struct netdev_saved_flags *sf)
1080 OVS_EXCLUDED(netdev_mutex)
1083 struct netdev *netdev = sf->netdev;
1084 enum netdev_flags old_flags;
1086 netdev->netdev_class->update_flags(netdev,
1087 sf->saved_flags & sf->saved_values,
1088 sf->saved_flags & ~sf->saved_values,
1091 ovs_mutex_lock(&netdev_mutex);
1092 list_remove(&sf->node);
1094 netdev_unref(netdev);
1098 /* Looks up the ARP table entry for 'ip' on 'netdev'. If one exists and can be
1099 * successfully retrieved, it stores the corresponding MAC address in 'mac' and
1100 * returns 0. Otherwise, it returns a positive errno value; in particular,
1101 * ENXIO indicates that there is no ARP table entry for 'ip' on 'netdev'. */
1103 netdev_arp_lookup(const struct netdev *netdev,
1104 ovs_be32 ip, uint8_t mac[ETH_ADDR_LEN])
1106 int error = (netdev->netdev_class->arp_lookup
1107 ? netdev->netdev_class->arp_lookup(netdev, ip, mac)
1110 memset(mac, 0, ETH_ADDR_LEN);
1115 /* Returns true if carrier is active (link light is on) on 'netdev'. */
1117 netdev_get_carrier(const struct netdev *netdev)
1120 enum netdev_flags flags;
1123 netdev_get_flags(netdev, &flags);
1124 if (!(flags & NETDEV_UP)) {
1128 if (!netdev->netdev_class->get_carrier) {
1132 error = netdev->netdev_class->get_carrier(netdev, &carrier);
1134 VLOG_DBG("%s: failed to get network device carrier status, assuming "
1135 "down: %s", netdev_get_name(netdev), ovs_strerror(error));
1142 /* Returns the number of times 'netdev''s carrier has changed. */
1144 netdev_get_carrier_resets(const struct netdev *netdev)
1146 return (netdev->netdev_class->get_carrier_resets
1147 ? netdev->netdev_class->get_carrier_resets(netdev)
1151 /* Attempts to force netdev_get_carrier() to poll 'netdev''s MII registers for
1152 * link status instead of checking 'netdev''s carrier. 'netdev''s MII
1153 * registers will be polled once ever 'interval' milliseconds. If 'netdev'
1154 * does not support MII, another method may be used as a fallback. If
1155 * 'interval' is less than or equal to zero, reverts netdev_get_carrier() to
1156 * its normal behavior.
1158 * Returns 0 if successful, otherwise a positive errno value. */
1160 netdev_set_miimon_interval(struct netdev *netdev, long long int interval)
1162 return (netdev->netdev_class->set_miimon_interval
1163 ? netdev->netdev_class->set_miimon_interval(netdev, interval)
1167 /* Retrieves current device stats for 'netdev'. */
1169 netdev_get_stats(const struct netdev *netdev, struct netdev_stats *stats)
1173 COVERAGE_INC(netdev_get_stats);
1174 error = (netdev->netdev_class->get_stats
1175 ? netdev->netdev_class->get_stats(netdev, stats)
1178 memset(stats, 0xff, sizeof *stats);
1183 /* Attempts to change the stats for 'netdev' to those provided in 'stats'.
1184 * Returns 0 if successful, otherwise a positive errno value.
1186 * This will probably fail for most network devices. Some devices might only
1187 * allow setting their stats to 0. */
1189 netdev_set_stats(struct netdev *netdev, const struct netdev_stats *stats)
1191 return (netdev->netdev_class->set_stats
1192 ? netdev->netdev_class->set_stats(netdev, stats)
1196 /* Attempts to set input rate limiting (policing) policy, such that up to
1197 * 'kbits_rate' kbps of traffic is accepted, with a maximum accumulative burst
1198 * size of 'kbits' kb. */
1200 netdev_set_policing(struct netdev *netdev, uint32_t kbits_rate,
1201 uint32_t kbits_burst)
1203 return (netdev->netdev_class->set_policing
1204 ? netdev->netdev_class->set_policing(netdev,
1205 kbits_rate, kbits_burst)
1209 /* Adds to 'types' all of the forms of QoS supported by 'netdev', or leaves it
1210 * empty if 'netdev' does not support QoS. Any names added to 'types' should
1211 * be documented as valid for the "type" column in the "QoS" table in
1212 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1214 * Every network device supports disabling QoS with a type of "", but this type
1215 * will not be added to 'types'.
1217 * The caller must initialize 'types' (e.g. with sset_init()) before calling
1218 * this function. The caller is responsible for destroying 'types' (e.g. with
1219 * sset_destroy()) when it is no longer needed.
1221 * Returns 0 if successful, otherwise a positive errno value. */
1223 netdev_get_qos_types(const struct netdev *netdev, struct sset *types)
1225 const struct netdev_class *class = netdev->netdev_class;
1226 return (class->get_qos_types
1227 ? class->get_qos_types(netdev, types)
1231 /* Queries 'netdev' for its capabilities regarding the specified 'type' of QoS,
1232 * which should be "" or one of the types returned by netdev_get_qos_types()
1233 * for 'netdev'. Returns 0 if successful, otherwise a positive errno value.
1234 * On success, initializes 'caps' with the QoS capabilities; on failure, clears
1235 * 'caps' to all zeros. */
1237 netdev_get_qos_capabilities(const struct netdev *netdev, const char *type,
1238 struct netdev_qos_capabilities *caps)
1240 const struct netdev_class *class = netdev->netdev_class;
1243 int retval = (class->get_qos_capabilities
1244 ? class->get_qos_capabilities(netdev, type, caps)
1247 memset(caps, 0, sizeof *caps);
1251 /* Every netdev supports turning off QoS. */
1252 memset(caps, 0, sizeof *caps);
1257 /* Obtains the number of queues supported by 'netdev' for the specified 'type'
1258 * of QoS. Returns 0 if successful, otherwise a positive errno value. Stores
1259 * the number of queues (zero on failure) in '*n_queuesp'.
1261 * This is just a simple wrapper around netdev_get_qos_capabilities(). */
1263 netdev_get_n_queues(const struct netdev *netdev,
1264 const char *type, unsigned int *n_queuesp)
1266 struct netdev_qos_capabilities caps;
1269 retval = netdev_get_qos_capabilities(netdev, type, &caps);
1270 *n_queuesp = caps.n_queues;
1274 /* Queries 'netdev' about its currently configured form of QoS. If successful,
1275 * stores the name of the current form of QoS into '*typep', stores any details
1276 * of configuration as string key-value pairs in 'details', and returns 0. On
1277 * failure, sets '*typep' to NULL and returns a positive errno value.
1279 * A '*typep' of "" indicates that QoS is currently disabled on 'netdev'.
1281 * The caller must initialize 'details' as an empty smap (e.g. with
1282 * smap_init()) before calling this function. The caller must free 'details'
1283 * when it is no longer needed (e.g. with smap_destroy()).
1285 * The caller must not modify or free '*typep'.
1287 * '*typep' will be one of the types returned by netdev_get_qos_types() for
1288 * 'netdev'. The contents of 'details' should be documented as valid for
1289 * '*typep' in the "other_config" column in the "QoS" table in
1290 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)). */
1292 netdev_get_qos(const struct netdev *netdev,
1293 const char **typep, struct smap *details)
1295 const struct netdev_class *class = netdev->netdev_class;
1298 if (class->get_qos) {
1299 retval = class->get_qos(netdev, typep, details);
1302 smap_clear(details);
1306 /* 'netdev' doesn't support QoS, so report that QoS is disabled. */
1312 /* Attempts to reconfigure QoS on 'netdev', changing the form of QoS to 'type'
1313 * with details of configuration from 'details'. Returns 0 if successful,
1314 * otherwise a positive errno value. On error, the previous QoS configuration
1317 * When this function changes the type of QoS (not just 'details'), this also
1318 * resets all queue configuration for 'netdev' to their defaults (which depend
1319 * on the specific type of QoS). Otherwise, the queue configuration for
1320 * 'netdev' is unchanged.
1322 * 'type' should be "" (to disable QoS) or one of the types returned by
1323 * netdev_get_qos_types() for 'netdev'. The contents of 'details' should be
1324 * documented as valid for the given 'type' in the "other_config" column in the
1325 * "QoS" table in vswitchd/vswitch.xml (which is built as
1326 * ovs-vswitchd.conf.db(8)).
1328 * NULL may be specified for 'details' if there are no configuration
1331 netdev_set_qos(struct netdev *netdev,
1332 const char *type, const struct smap *details)
1334 const struct netdev_class *class = netdev->netdev_class;
1340 if (class->set_qos) {
1342 static const struct smap empty = SMAP_INITIALIZER(&empty);
1345 return class->set_qos(netdev, type, details);
1347 return *type ? EOPNOTSUPP : 0;
1351 /* Queries 'netdev' for information about the queue numbered 'queue_id'. If
1352 * successful, adds that information as string key-value pairs to 'details'.
1353 * Returns 0 if successful, otherwise a positive errno value.
1355 * 'queue_id' must be less than the number of queues supported by 'netdev' for
1356 * the current form of QoS (e.g. as returned by netdev_get_n_queues(netdev)).
1358 * The returned contents of 'details' should be documented as valid for the
1359 * given 'type' in the "other_config" column in the "Queue" table in
1360 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1362 * The caller must initialize 'details' (e.g. with smap_init()) before calling
1363 * this function. The caller must free 'details' when it is no longer needed
1364 * (e.g. with smap_destroy()). */
1366 netdev_get_queue(const struct netdev *netdev,
1367 unsigned int queue_id, struct smap *details)
1369 const struct netdev_class *class = netdev->netdev_class;
1372 retval = (class->get_queue
1373 ? class->get_queue(netdev, queue_id, details)
1376 smap_clear(details);
1381 /* Configures the queue numbered 'queue_id' on 'netdev' with the key-value
1382 * string pairs in 'details'. The contents of 'details' should be documented
1383 * as valid for the given 'type' in the "other_config" column in the "Queue"
1384 * table in vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1385 * Returns 0 if successful, otherwise a positive errno value. On failure, the
1386 * given queue's configuration should be unmodified.
1388 * 'queue_id' must be less than the number of queues supported by 'netdev' for
1389 * the current form of QoS (e.g. as returned by netdev_get_n_queues(netdev)).
1391 * This function does not modify 'details', and the caller retains ownership of
1394 netdev_set_queue(struct netdev *netdev,
1395 unsigned int queue_id, const struct smap *details)
1397 const struct netdev_class *class = netdev->netdev_class;
1398 return (class->set_queue
1399 ? class->set_queue(netdev, queue_id, details)
1403 /* Attempts to delete the queue numbered 'queue_id' from 'netdev'. Some kinds
1404 * of QoS may have a fixed set of queues, in which case attempts to delete them
1405 * will fail with EOPNOTSUPP.
1407 * Returns 0 if successful, otherwise a positive errno value. On failure, the
1408 * given queue will be unmodified.
1410 * 'queue_id' must be less than the number of queues supported by 'netdev' for
1411 * the current form of QoS (e.g. as returned by
1412 * netdev_get_n_queues(netdev)). */
1414 netdev_delete_queue(struct netdev *netdev, unsigned int queue_id)
1416 const struct netdev_class *class = netdev->netdev_class;
1417 return (class->delete_queue
1418 ? class->delete_queue(netdev, queue_id)
1422 /* Obtains statistics about 'queue_id' on 'netdev'. On success, returns 0 and
1423 * fills 'stats' with the queue's statistics; individual members of 'stats' may
1424 * be set to all-1-bits if the statistic is unavailable. On failure, returns a
1425 * positive errno value and fills 'stats' with values indicating unsupported
1428 netdev_get_queue_stats(const struct netdev *netdev, unsigned int queue_id,
1429 struct netdev_queue_stats *stats)
1431 const struct netdev_class *class = netdev->netdev_class;
1434 retval = (class->get_queue_stats
1435 ? class->get_queue_stats(netdev, queue_id, stats)
1438 stats->tx_bytes = UINT64_MAX;
1439 stats->tx_packets = UINT64_MAX;
1440 stats->tx_errors = UINT64_MAX;
1441 stats->created = LLONG_MIN;
1446 /* Initializes 'dump' to begin dumping the queues in a netdev.
1448 * This function provides no status indication. An error status for the entire
1449 * dump operation is provided when it is completed by calling
1450 * netdev_queue_dump_done().
1453 netdev_queue_dump_start(struct netdev_queue_dump *dump,
1454 const struct netdev *netdev)
1456 dump->netdev = netdev_ref(netdev);
1457 if (netdev->netdev_class->queue_dump_start) {
1458 dump->error = netdev->netdev_class->queue_dump_start(netdev,
1461 dump->error = EOPNOTSUPP;
1465 /* Attempts to retrieve another queue from 'dump', which must have been
1466 * initialized with netdev_queue_dump_start(). On success, stores a new queue
1467 * ID into '*queue_id', fills 'details' with configuration details for the
1468 * queue, and returns true. On failure, returns false.
1470 * Queues are not necessarily dumped in increasing order of queue ID (or any
1471 * other predictable order).
1473 * Failure might indicate an actual error or merely that the last queue has
1474 * been dumped. An error status for the entire dump operation is provided when
1475 * it is completed by calling netdev_queue_dump_done().
1477 * The returned contents of 'details' should be documented as valid for the
1478 * given 'type' in the "other_config" column in the "Queue" table in
1479 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1481 * The caller must initialize 'details' (e.g. with smap_init()) before calling
1482 * this function. This function will clear and replace its contents. The
1483 * caller must free 'details' when it is no longer needed (e.g. with
1484 * smap_destroy()). */
1486 netdev_queue_dump_next(struct netdev_queue_dump *dump,
1487 unsigned int *queue_id, struct smap *details)
1489 const struct netdev *netdev = dump->netdev;
1495 dump->error = netdev->netdev_class->queue_dump_next(netdev, dump->state,
1499 netdev->netdev_class->queue_dump_done(netdev, dump->state);
1505 /* Completes queue table dump operation 'dump', which must have been
1506 * initialized with netdev_queue_dump_start(). Returns 0 if the dump operation
1507 * was error-free, otherwise a positive errno value describing the problem. */
1509 netdev_queue_dump_done(struct netdev_queue_dump *dump)
1511 const struct netdev *netdev = dump->netdev;
1512 if (!dump->error && netdev->netdev_class->queue_dump_done) {
1513 dump->error = netdev->netdev_class->queue_dump_done(netdev,
1516 netdev_close(dump->netdev);
1517 return dump->error == EOF ? 0 : dump->error;
1520 /* Iterates over all of 'netdev''s queues, calling 'cb' with the queue's ID,
1521 * its statistics, and the 'aux' specified by the caller. The order of
1522 * iteration is unspecified, but (when successful) each queue is visited
1525 * Calling this function may be more efficient than calling
1526 * netdev_get_queue_stats() for every queue.
1528 * 'cb' must not modify or free the statistics passed in.
1530 * Returns 0 if successful, otherwise a positive errno value. On error, some
1531 * configured queues may not have been included in the iteration. */
1533 netdev_dump_queue_stats(const struct netdev *netdev,
1534 netdev_dump_queue_stats_cb *cb, void *aux)
1536 const struct netdev_class *class = netdev->netdev_class;
1537 return (class->dump_queue_stats
1538 ? class->dump_queue_stats(netdev, cb, aux)
1543 /* Returns the class type of 'netdev'.
1545 * The caller must not free the returned value. */
1547 netdev_get_type(const struct netdev *netdev)
1549 return netdev->netdev_class->type;
1552 /* Returns the class associated with 'netdev'. */
1553 const struct netdev_class *
1554 netdev_get_class(const struct netdev *netdev)
1556 return netdev->netdev_class;
1559 /* Returns the netdev with 'name' or NULL if there is none.
1561 * The caller must free the returned netdev with netdev_close(). */
1563 netdev_from_name(const char *name)
1564 OVS_EXCLUDED(netdev_mutex)
1566 struct netdev *netdev;
1568 ovs_mutex_lock(&netdev_mutex);
1569 netdev = shash_find_data(&netdev_shash, name);
1573 ovs_mutex_unlock(&netdev_mutex);
1578 /* Fills 'device_list' with devices that match 'netdev_class'.
1580 * The caller is responsible for initializing and destroying 'device_list' and
1581 * must close each device on the list. */
1583 netdev_get_devices(const struct netdev_class *netdev_class,
1584 struct shash *device_list)
1585 OVS_EXCLUDED(netdev_mutex)
1587 struct shash_node *node;
1589 ovs_mutex_lock(&netdev_mutex);
1590 SHASH_FOR_EACH (node, &netdev_shash) {
1591 struct netdev *dev = node->data;
1593 if (dev->netdev_class == netdev_class) {
1595 shash_add(device_list, node->name, node->data);
1598 ovs_mutex_unlock(&netdev_mutex);
1602 netdev_get_type_from_name(const char *name)
1604 struct netdev *dev = netdev_from_name(name);
1605 const char *type = dev ? netdev_get_type(dev) : NULL;
1611 netdev_rxq_get_netdev(const struct netdev_rxq *rx)
1613 ovs_assert(rx->netdev->ref_cnt > 0);
1618 netdev_rxq_get_name(const struct netdev_rxq *rx)
1620 return netdev_get_name(netdev_rxq_get_netdev(rx));
1624 restore_all_flags(void *aux OVS_UNUSED)
1626 struct shash_node *node;
1628 SHASH_FOR_EACH (node, &netdev_shash) {
1629 struct netdev *netdev = node->data;
1630 const struct netdev_saved_flags *sf;
1631 enum netdev_flags saved_values;
1632 enum netdev_flags saved_flags;
1634 saved_values = saved_flags = 0;
1635 LIST_FOR_EACH (sf, node, &netdev->saved_flags_list) {
1636 saved_flags |= sf->saved_flags;
1637 saved_values &= ~sf->saved_flags;
1638 saved_values |= sf->saved_flags & sf->saved_values;
1641 enum netdev_flags old_flags;
1643 netdev->netdev_class->update_flags(netdev,
1644 saved_flags & saved_values,
1645 saved_flags & ~saved_values,