2 * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 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 not an rwlock for performance reasons but to allow recursive
71 * acquisition when calling into providers. For example, netdev_run() calls
72 * into provider 'run' functions, which might reasonably want to call one of
73 * the netdev functions that takes netdev_class_rwlock read-only. */
74 static struct ovs_rwlock netdev_class_rwlock OVS_ACQ_BEFORE(netdev_mutex)
75 = OVS_RWLOCK_INITIALIZER;
77 /* Contains 'struct netdev_registered_class'es. */
78 static struct hmap netdev_classes OVS_GUARDED_BY(netdev_class_rwlock)
79 = HMAP_INITIALIZER(&netdev_classes);
81 struct netdev_registered_class {
82 struct hmap_node hmap_node; /* In 'netdev_classes', by class->type. */
83 const struct netdev_class *class;
84 atomic_int ref_cnt; /* Number of 'struct netdev's of this class. */
87 /* This is set pretty low because we probably won't learn anything from the
88 * additional log messages. */
89 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
91 static void restore_all_flags(void *aux OVS_UNUSED);
92 void update_device_args(struct netdev *, const struct shash *args);
95 netdev_initialize(void)
96 OVS_EXCLUDED(netdev_class_rwlock, netdev_mutex)
98 static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
100 if (ovsthread_once_start(&once)) {
101 fatal_signal_add_hook(restore_all_flags, NULL, NULL, true);
102 netdev_vport_patch_register();
104 #ifdef LINUX_DATAPATH
105 netdev_register_provider(&netdev_linux_class);
106 netdev_register_provider(&netdev_internal_class);
107 netdev_register_provider(&netdev_tap_class);
108 netdev_vport_tunnel_register();
110 #if defined(__FreeBSD__) || defined(__NetBSD__)
111 netdev_register_provider(&netdev_tap_class);
112 netdev_register_provider(&netdev_bsd_class);
114 netdev_register_provider(&netdev_tunnel_class);
115 netdev_register_provider(&netdev_pltap_class);
117 ovsthread_once_done(&once);
121 /* Performs periodic work needed by all the various kinds of netdevs.
123 * If your program opens any netdevs, it must call this function within its
127 OVS_EXCLUDED(netdev_class_rwlock, netdev_mutex)
129 struct netdev_registered_class *rc;
131 ovs_rwlock_rdlock(&netdev_class_rwlock);
132 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
133 if (rc->class->run) {
137 ovs_rwlock_unlock(&netdev_class_rwlock);
140 /* Arranges for poll_block() to wake up when netdev_run() needs to be called.
142 * If your program opens any netdevs, it must call this function within its
146 OVS_EXCLUDED(netdev_class_rwlock, netdev_mutex)
148 struct netdev_registered_class *rc;
150 ovs_rwlock_rdlock(&netdev_class_rwlock);
151 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
152 if (rc->class->wait) {
156 ovs_rwlock_unlock(&netdev_class_rwlock);
159 static struct netdev_registered_class *
160 netdev_lookup_class(const char *type)
161 OVS_REQ_RDLOCK(netdev_class_rwlock)
163 struct netdev_registered_class *rc;
165 HMAP_FOR_EACH_WITH_HASH (rc, hmap_node, hash_string(type, 0),
167 if (!strcmp(type, rc->class->type)) {
174 /* Initializes and registers a new netdev provider. After successful
175 * registration, new netdevs of that type can be opened using netdev_open(). */
177 netdev_register_provider(const struct netdev_class *new_class)
178 OVS_EXCLUDED(netdev_class_rwlock, netdev_mutex)
182 ovs_rwlock_wrlock(&netdev_class_rwlock);
183 if (netdev_lookup_class(new_class->type)) {
184 VLOG_WARN("attempted to register duplicate netdev provider: %s",
188 error = new_class->init ? new_class->init() : 0;
190 struct netdev_registered_class *rc;
192 rc = xmalloc(sizeof *rc);
193 hmap_insert(&netdev_classes, &rc->hmap_node,
194 hash_string(new_class->type, 0));
195 rc->class = new_class;
196 atomic_init(&rc->ref_cnt, 0);
198 VLOG_ERR("failed to initialize %s network device class: %s",
199 new_class->type, ovs_strerror(error));
202 ovs_rwlock_unlock(&netdev_class_rwlock);
207 /* Unregisters a netdev provider. 'type' must have been previously
208 * registered and not currently be in use by any netdevs. After unregistration
209 * new netdevs of that type cannot be opened using netdev_open(). */
211 netdev_unregister_provider(const char *type)
212 OVS_EXCLUDED(netdev_class_rwlock, netdev_mutex)
214 struct netdev_registered_class *rc;
217 ovs_rwlock_wrlock(&netdev_class_rwlock);
218 rc = netdev_lookup_class(type);
220 VLOG_WARN("attempted to unregister a netdev provider that is not "
221 "registered: %s", type);
222 error = EAFNOSUPPORT;
226 atomic_read(&rc->ref_cnt, &ref_cnt);
228 hmap_remove(&netdev_classes, &rc->hmap_node);
229 atomic_destroy(&rc->ref_cnt);
233 VLOG_WARN("attempted to unregister in use netdev provider: %s",
238 ovs_rwlock_unlock(&netdev_class_rwlock);
243 /* Clears 'types' and enumerates the types of all currently registered netdev
244 * providers into it. The caller must first initialize the sset. */
246 netdev_enumerate_types(struct sset *types)
247 OVS_EXCLUDED(netdev_mutex)
249 struct netdev_registered_class *rc;
254 ovs_rwlock_rdlock(&netdev_class_rwlock);
255 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
256 sset_add(types, rc->class->type);
258 ovs_rwlock_unlock(&netdev_class_rwlock);
261 /* Check that the network device name is not the same as any of the registered
262 * vport providers' dpif_port name (dpif_port is NULL if the vport provider
263 * does not define it) or the datapath internal port name (e.g. ovs-system).
265 * Returns true if there is a name conflict, false otherwise. */
267 netdev_is_reserved_name(const char *name)
268 OVS_EXCLUDED(netdev_mutex)
270 struct netdev_registered_class *rc;
274 ovs_rwlock_rdlock(&netdev_class_rwlock);
275 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
276 const char *dpif_port = netdev_vport_class_get_dpif_port(rc->class);
277 if (dpif_port && !strcmp(dpif_port, name)) {
278 ovs_rwlock_unlock(&netdev_class_rwlock);
282 ovs_rwlock_unlock(&netdev_class_rwlock);
284 if (!strncmp(name, "ovs-", 4)) {
289 dp_enumerate_types(&types);
290 SSET_FOR_EACH (type, &types) {
291 if (!strcmp(name+4, type)) {
292 sset_destroy(&types);
296 sset_destroy(&types);
302 /* Opens the network device named 'name' (e.g. "eth0") of the specified 'type'
303 * (e.g. "system") and returns zero if successful, otherwise a positive errno
304 * value. On success, sets '*netdevp' to the new network device, otherwise to
307 * Some network devices may need to be configured (with netdev_set_config())
308 * before they can be used. */
310 netdev_open(const char *name, const char *type, struct netdev **netdevp)
311 OVS_EXCLUDED(netdev_mutex)
313 struct netdev *netdev;
318 ovs_rwlock_rdlock(&netdev_class_rwlock);
319 ovs_mutex_lock(&netdev_mutex);
320 netdev = shash_find_data(&netdev_shash, name);
322 struct netdev_registered_class *rc;
324 rc = netdev_lookup_class(type && type[0] ? type : "system");
326 netdev = rc->class->alloc();
328 memset(netdev, 0, sizeof *netdev);
329 netdev->netdev_class = rc->class;
330 netdev->name = xstrdup(name);
331 netdev->node = shash_add(&netdev_shash, name, netdev);
332 list_init(&netdev->saved_flags_list);
334 error = rc->class->construct(netdev);
338 atomic_add(&rc->ref_cnt, 1, &old_ref_cnt);
339 seq_change(connectivity_seq_get());
342 ovs_assert(list_is_empty(&netdev->saved_flags_list));
343 shash_delete(&netdev_shash, netdev->node);
344 rc->class->dealloc(netdev);
350 VLOG_WARN("could not create netdev %s of unknown type %s",
352 error = EAFNOSUPPORT;
358 ovs_mutex_unlock(&netdev_mutex);
359 ovs_rwlock_unlock(&netdev_class_rwlock);
370 /* Returns a reference to 'netdev_' for the caller to own. Returns null if
371 * 'netdev_' is null. */
373 netdev_ref(const struct netdev *netdev_)
374 OVS_EXCLUDED(netdev_mutex)
376 struct netdev *netdev = CONST_CAST(struct netdev *, netdev_);
379 ovs_mutex_lock(&netdev_mutex);
380 ovs_assert(netdev->ref_cnt > 0);
382 ovs_mutex_unlock(&netdev_mutex);
387 /* Reconfigures the device 'netdev' with 'args'. 'args' may be empty
388 * or NULL if none are needed. */
390 netdev_set_config(struct netdev *netdev, const struct smap *args)
391 OVS_EXCLUDED(netdev_mutex)
393 if (netdev->netdev_class->set_config) {
394 const struct smap no_args = SMAP_INITIALIZER(&no_args);
397 error = netdev->netdev_class->set_config(netdev,
398 args ? args : &no_args);
400 VLOG_WARN("%s: could not set configuration (%s)",
401 netdev_get_name(netdev), ovs_strerror(error));
404 } else if (args && !smap_is_empty(args)) {
405 VLOG_WARN("%s: arguments provided to device that is not configurable",
406 netdev_get_name(netdev));
411 /* Returns the current configuration for 'netdev' in 'args'. The caller must
412 * have already initialized 'args' with smap_init(). Returns 0 on success, in
413 * which case 'args' will be filled with 'netdev''s configuration. On failure
414 * returns a positive errno value, in which case 'args' will be empty.
416 * The caller owns 'args' and its contents and must eventually free them with
419 netdev_get_config(const struct netdev *netdev, struct smap *args)
420 OVS_EXCLUDED(netdev_mutex)
425 if (netdev->netdev_class->get_config) {
426 error = netdev->netdev_class->get_config(netdev, args);
437 const struct netdev_tunnel_config *
438 netdev_get_tunnel_config(const struct netdev *netdev)
439 OVS_EXCLUDED(netdev_mutex)
441 if (netdev->netdev_class->get_tunnel_config) {
442 return netdev->netdev_class->get_tunnel_config(netdev);
449 netdev_unref(struct netdev *dev)
450 OVS_RELEASES(netdev_mutex)
452 ovs_assert(dev->ref_cnt);
453 if (!--dev->ref_cnt) {
454 const struct netdev_class *class = dev->netdev_class;
455 struct netdev_registered_class *rc;
458 dev->netdev_class->destruct(dev);
460 shash_delete(&netdev_shash, dev->node);
462 dev->netdev_class->dealloc(dev);
463 ovs_mutex_unlock(&netdev_mutex);
465 ovs_rwlock_rdlock(&netdev_class_rwlock);
466 rc = netdev_lookup_class(class->type);
467 atomic_sub(&rc->ref_cnt, 1, &old_ref_cnt);
468 ovs_assert(old_ref_cnt > 0);
469 ovs_rwlock_unlock(&netdev_class_rwlock);
471 ovs_mutex_unlock(&netdev_mutex);
475 /* Closes and destroys 'netdev'. */
477 netdev_close(struct netdev *netdev)
478 OVS_EXCLUDED(netdev_mutex)
481 ovs_mutex_lock(&netdev_mutex);
482 netdev_unref(netdev);
486 /* Parses 'netdev_name_', which is of the form [type@]name into its component
487 * pieces. 'name' and 'type' must be freed by the caller. */
489 netdev_parse_name(const char *netdev_name_, char **name, char **type)
491 char *netdev_name = xstrdup(netdev_name_);
494 separator = strchr(netdev_name, '@');
498 *name = xstrdup(separator + 1);
501 *type = xstrdup("system");
505 /* Attempts to open a netdev_rx handle for obtaining packets received on
506 * 'netdev'. On success, returns 0 and stores a nonnull 'netdev_rx *' into
507 * '*rxp'. On failure, returns a positive errno value and stores NULL into
510 * Some kinds of network devices might not support receiving packets. This
511 * function returns EOPNOTSUPP in that case.*/
513 netdev_rx_open(struct netdev *netdev, struct netdev_rx **rxp)
514 OVS_EXCLUDED(netdev_mutex)
518 if (netdev->netdev_class->rx_alloc) {
519 struct netdev_rx *rx = netdev->netdev_class->rx_alloc();
522 error = netdev->netdev_class->rx_construct(rx);
524 ovs_mutex_lock(&netdev_mutex);
526 ovs_mutex_unlock(&netdev_mutex);
531 netdev->netdev_class->rx_dealloc(rx);
545 netdev_rx_close(struct netdev_rx *rx)
546 OVS_EXCLUDED(netdev_mutex)
549 struct netdev *netdev = rx->netdev;
550 netdev->netdev_class->rx_destruct(rx);
551 netdev->netdev_class->rx_dealloc(rx);
552 netdev_close(netdev);
556 /* Attempts to receive a packet from 'rx' into the tailroom of 'buffer', which
557 * must initially be empty. If successful, returns 0 and increments
558 * 'buffer->size' by the number of bytes in the received packet, otherwise a
559 * positive errno value.
561 * Returns EAGAIN immediately if no packet is ready to be received.
563 * Returns EMSGSIZE, and discards the packet, if the received packet is longer
564 * than 'ofpbuf_tailroom(buffer)'.
566 * Implementations may make use of VLAN_HEADER_LEN bytes of tailroom to
567 * add a VLAN header which is obtained out-of-band to the packet. If
568 * this occurs then VLAN_HEADER_LEN bytes of tailroom will no longer be
569 * available for the packet, otherwise it may be used for the packet
572 * It is advised that the tailroom of 'buffer' should be
573 * VLAN_HEADER_LEN bytes longer than the MTU to allow space for an
574 * out-of-band VLAN header to be added to the packet. At the very least,
575 * 'buffer' must have at least ETH_TOTAL_MIN bytes of tailroom.
577 * This function may be set to null if it would always return EOPNOTSUPP
580 netdev_rx_recv(struct netdev_rx *rx, struct ofpbuf *buffer)
584 ovs_assert(buffer->size == 0);
585 ovs_assert(ofpbuf_tailroom(buffer) >= ETH_TOTAL_MIN);
587 retval = rx->netdev->netdev_class->rx_recv(rx, buffer);
589 COVERAGE_INC(netdev_received);
590 if (buffer->size < ETH_TOTAL_MIN) {
591 ofpbuf_put_zeros(buffer, ETH_TOTAL_MIN - buffer->size);
599 /* Arranges for poll_block() to wake up when a packet is ready to be received
602 netdev_rx_wait(struct netdev_rx *rx)
604 rx->netdev->netdev_class->rx_wait(rx);
607 /* Discards any packets ready to be received on 'rx'. */
609 netdev_rx_drain(struct netdev_rx *rx)
611 return (rx->netdev->netdev_class->rx_drain
612 ? rx->netdev->netdev_class->rx_drain(rx)
616 /* Sends 'buffer' on 'netdev'. Returns 0 if successful, otherwise a positive
617 * errno value. Returns EAGAIN without blocking if the packet cannot be queued
618 * immediately. Returns EMSGSIZE if a partial packet was transmitted or if
619 * the packet is too big or too small to transmit on the device.
621 * The caller retains ownership of 'buffer' in all cases.
623 * The kernel maintains a packet transmission queue, so the caller is not
624 * expected to do additional queuing of packets.
626 * Some network devices may not implement support for this function. In such
627 * cases this function will always return EOPNOTSUPP. */
629 netdev_send(struct netdev *netdev, const struct ofpbuf *buffer)
633 error = (netdev->netdev_class->send
634 ? netdev->netdev_class->send(netdev, buffer->data, buffer->size)
637 COVERAGE_INC(netdev_sent);
642 /* Registers with the poll loop to wake up from the next call to poll_block()
643 * when the packet transmission queue has sufficient room to transmit a packet
644 * with netdev_send().
646 * The kernel maintains a packet transmission queue, so the client is not
647 * expected to do additional queuing of packets. Thus, this function is
648 * unlikely to ever be used. It is included for completeness. */
650 netdev_send_wait(struct netdev *netdev)
652 if (netdev->netdev_class->send_wait) {
653 netdev->netdev_class->send_wait(netdev);
657 /* Attempts to set 'netdev''s MAC address to 'mac'. Returns 0 if successful,
658 * otherwise a positive errno value. */
660 netdev_set_etheraddr(struct netdev *netdev, const uint8_t mac[ETH_ADDR_LEN])
662 return netdev->netdev_class->set_etheraddr(netdev, mac);
665 /* Retrieves 'netdev''s MAC address. If successful, returns 0 and copies the
666 * the MAC address into 'mac'. On failure, returns a positive errno value and
667 * clears 'mac' to all-zeros. */
669 netdev_get_etheraddr(const struct netdev *netdev, uint8_t mac[ETH_ADDR_LEN])
671 return netdev->netdev_class->get_etheraddr(netdev, mac);
674 /* Returns the name of the network device that 'netdev' represents,
675 * e.g. "eth0". The caller must not modify or free the returned string. */
677 netdev_get_name(const struct netdev *netdev)
682 /* Retrieves the MTU of 'netdev'. The MTU is the maximum size of transmitted
683 * (and received) packets, in bytes, not including the hardware header; thus,
684 * this is typically 1500 bytes for Ethernet devices.
686 * If successful, returns 0 and stores the MTU size in '*mtup'. Returns
687 * EOPNOTSUPP if 'netdev' does not have an MTU (as e.g. some tunnels do not).
688 * On other failure, returns a positive errno value. On failure, sets '*mtup'
691 netdev_get_mtu(const struct netdev *netdev, int *mtup)
693 const struct netdev_class *class = netdev->netdev_class;
696 error = class->get_mtu ? class->get_mtu(netdev, mtup) : EOPNOTSUPP;
699 if (error != EOPNOTSUPP) {
700 VLOG_DBG_RL(&rl, "failed to retrieve MTU for network device %s: "
701 "%s", netdev_get_name(netdev), ovs_strerror(error));
707 /* Sets the MTU of 'netdev'. The MTU is the maximum size of transmitted
708 * (and received) packets, in bytes.
710 * If successful, returns 0. Returns EOPNOTSUPP if 'netdev' does not have an
711 * MTU (as e.g. some tunnels do not). On other failure, returns a positive
714 netdev_set_mtu(const struct netdev *netdev, int mtu)
716 const struct netdev_class *class = netdev->netdev_class;
719 error = class->set_mtu ? class->set_mtu(netdev, mtu) : EOPNOTSUPP;
720 if (error && error != EOPNOTSUPP) {
721 VLOG_DBG_RL(&rl, "failed to set MTU for network device %s: %s",
722 netdev_get_name(netdev), ovs_strerror(error));
728 /* Returns the ifindex of 'netdev', if successful, as a positive number. On
729 * failure, returns a negative errno value.
731 * The desired semantics of the ifindex value are a combination of those
732 * specified by POSIX for if_nametoindex() and by SNMP for ifIndex. An ifindex
733 * value should be unique within a host and remain stable at least until
734 * reboot. SNMP says an ifindex "ranges between 1 and the value of ifNumber"
735 * but many systems do not follow this rule anyhow.
737 * Some network devices may not implement support for this function. In such
738 * cases this function will always return -EOPNOTSUPP.
741 netdev_get_ifindex(const struct netdev *netdev)
743 int (*get_ifindex)(const struct netdev *);
745 get_ifindex = netdev->netdev_class->get_ifindex;
747 return get_ifindex ? get_ifindex(netdev) : -EOPNOTSUPP;
750 /* Stores the features supported by 'netdev' into each of '*current',
751 * '*advertised', '*supported', and '*peer' that are non-null. Each value is a
752 * bitmap of "enum ofp_port_features" bits, in host byte order. Returns 0 if
753 * successful, otherwise a positive errno value. On failure, all of the
754 * passed-in values are set to 0.
756 * Some network devices may not implement support for this function. In such
757 * cases this function will always return EOPNOTSUPP. */
759 netdev_get_features(const struct netdev *netdev,
760 enum netdev_features *current,
761 enum netdev_features *advertised,
762 enum netdev_features *supported,
763 enum netdev_features *peer)
765 int (*get_features)(const struct netdev *netdev,
766 enum netdev_features *current,
767 enum netdev_features *advertised,
768 enum netdev_features *supported,
769 enum netdev_features *peer);
770 enum netdev_features dummy[4];
777 advertised = &dummy[1];
780 supported = &dummy[2];
786 get_features = netdev->netdev_class->get_features;
788 ? get_features(netdev, current, advertised, supported,
792 *current = *advertised = *supported = *peer = 0;
797 /* Returns the maximum speed of a network connection that has the NETDEV_F_*
798 * bits in 'features', in bits per second. If no bits that indicate a speed
799 * are set in 'features', returns 'default_bps'. */
801 netdev_features_to_bps(enum netdev_features features,
802 uint64_t default_bps)
805 F_1000000MB = NETDEV_F_1TB_FD,
806 F_100000MB = NETDEV_F_100GB_FD,
807 F_40000MB = NETDEV_F_40GB_FD,
808 F_10000MB = NETDEV_F_10GB_FD,
809 F_1000MB = NETDEV_F_1GB_HD | NETDEV_F_1GB_FD,
810 F_100MB = NETDEV_F_100MB_HD | NETDEV_F_100MB_FD,
811 F_10MB = NETDEV_F_10MB_HD | NETDEV_F_10MB_FD
814 return ( features & F_1000000MB ? UINT64_C(1000000000000)
815 : features & F_100000MB ? UINT64_C(100000000000)
816 : features & F_40000MB ? UINT64_C(40000000000)
817 : features & F_10000MB ? UINT64_C(10000000000)
818 : features & F_1000MB ? UINT64_C(1000000000)
819 : features & F_100MB ? UINT64_C(100000000)
820 : features & F_10MB ? UINT64_C(10000000)
824 /* Returns true if any of the NETDEV_F_* bits that indicate a full-duplex link
825 * are set in 'features', otherwise false. */
827 netdev_features_is_full_duplex(enum netdev_features features)
829 return (features & (NETDEV_F_10MB_FD | NETDEV_F_100MB_FD | NETDEV_F_1GB_FD
830 | NETDEV_F_10GB_FD | NETDEV_F_40GB_FD
831 | NETDEV_F_100GB_FD | NETDEV_F_1TB_FD)) != 0;
834 /* Set the features advertised by 'netdev' to 'advertise'. Returns 0 if
835 * successful, otherwise a positive errno value. */
837 netdev_set_advertisements(struct netdev *netdev,
838 enum netdev_features advertise)
840 return (netdev->netdev_class->set_advertisements
841 ? netdev->netdev_class->set_advertisements(
846 /* If 'netdev' has an assigned IPv4 address, sets '*address' to that address
847 * and '*netmask' to its netmask and returns 0. Otherwise, returns a positive
848 * errno value and sets '*address' to 0 (INADDR_ANY).
850 * The following error values have well-defined meanings:
852 * - EADDRNOTAVAIL: 'netdev' has no assigned IPv4 address.
854 * - EOPNOTSUPP: No IPv4 network stack attached to 'netdev'.
856 * 'address' or 'netmask' or both may be null, in which case the address or
857 * netmask is not reported. */
859 netdev_get_in4(const struct netdev *netdev,
860 struct in_addr *address_, struct in_addr *netmask_)
862 struct in_addr address;
863 struct in_addr netmask;
866 error = (netdev->netdev_class->get_in4
867 ? netdev->netdev_class->get_in4(netdev,
871 address_->s_addr = error ? 0 : address.s_addr;
874 netmask_->s_addr = error ? 0 : netmask.s_addr;
879 /* Assigns 'addr' as 'netdev''s IPv4 address and 'mask' as its netmask. If
880 * 'addr' is INADDR_ANY, 'netdev''s IPv4 address is cleared. Returns a
881 * positive errno value. */
883 netdev_set_in4(struct netdev *netdev, struct in_addr addr, struct in_addr mask)
885 return (netdev->netdev_class->set_in4
886 ? netdev->netdev_class->set_in4(netdev, addr, mask)
890 /* Obtains ad IPv4 address from device name and save the address in
891 * in4. Returns 0 if successful, otherwise a positive errno value.
894 netdev_get_in4_by_name(const char *device_name, struct in_addr *in4)
896 struct netdev *netdev;
899 error = netdev_open(device_name, "system", &netdev);
901 in4->s_addr = htonl(0);
905 error = netdev_get_in4(netdev, in4, NULL);
906 netdev_close(netdev);
910 /* Adds 'router' as a default IP gateway for the TCP/IP stack that corresponds
913 netdev_add_router(struct netdev *netdev, struct in_addr router)
915 COVERAGE_INC(netdev_add_router);
916 return (netdev->netdev_class->add_router
917 ? netdev->netdev_class->add_router(netdev, router)
921 /* Looks up the next hop for 'host' for the TCP/IP stack that corresponds to
922 * 'netdev'. If a route cannot not be determined, sets '*next_hop' to 0,
923 * '*netdev_name' to null, and returns a positive errno value. Otherwise, if a
924 * next hop is found, stores the next hop gateway's address (0 if 'host' is on
925 * a directly connected network) in '*next_hop' and a copy of the name of the
926 * device to reach 'host' in '*netdev_name', and returns 0. The caller is
927 * responsible for freeing '*netdev_name' (by calling free()). */
929 netdev_get_next_hop(const struct netdev *netdev,
930 const struct in_addr *host, struct in_addr *next_hop,
933 int error = (netdev->netdev_class->get_next_hop
934 ? netdev->netdev_class->get_next_hop(
935 host, next_hop, netdev_name)
938 next_hop->s_addr = 0;
944 /* Populates 'smap' with status information.
946 * Populates 'smap' with 'netdev' specific status information. This
947 * information may be used to populate the status column of the Interface table
948 * as defined in ovs-vswitchd.conf.db(5). */
950 netdev_get_status(const struct netdev *netdev, struct smap *smap)
952 return (netdev->netdev_class->get_status
953 ? netdev->netdev_class->get_status(netdev, smap)
957 /* If 'netdev' has an assigned IPv6 address, sets '*in6' to that address and
958 * returns 0. Otherwise, returns a positive errno value and sets '*in6' to
959 * all-zero-bits (in6addr_any).
961 * The following error values have well-defined meanings:
963 * - EADDRNOTAVAIL: 'netdev' has no assigned IPv6 address.
965 * - EOPNOTSUPP: No IPv6 network stack attached to 'netdev'.
967 * 'in6' may be null, in which case the address itself is not reported. */
969 netdev_get_in6(const struct netdev *netdev, struct in6_addr *in6)
971 struct in6_addr dummy;
974 error = (netdev->netdev_class->get_in6
975 ? netdev->netdev_class->get_in6(netdev,
979 memset(in6, 0, sizeof *in6);
984 /* On 'netdev', turns off the flags in 'off' and then turns on the flags in
985 * 'on'. Returns 0 if successful, otherwise a positive errno value. */
987 do_update_flags(struct netdev *netdev, enum netdev_flags off,
988 enum netdev_flags on, enum netdev_flags *old_flagsp,
989 struct netdev_saved_flags **sfp)
990 OVS_EXCLUDED(netdev_mutex)
992 struct netdev_saved_flags *sf = NULL;
993 enum netdev_flags old_flags;
996 error = netdev->netdev_class->update_flags(netdev, off & ~on, on,
999 VLOG_WARN_RL(&rl, "failed to %s flags for network device %s: %s",
1000 off || on ? "set" : "get", netdev_get_name(netdev),
1001 ovs_strerror(error));
1003 } else if ((off || on) && sfp) {
1004 enum netdev_flags new_flags = (old_flags & ~off) | on;
1005 enum netdev_flags changed_flags = old_flags ^ new_flags;
1006 if (changed_flags) {
1007 ovs_mutex_lock(&netdev_mutex);
1008 *sfp = sf = xmalloc(sizeof *sf);
1009 sf->netdev = netdev;
1010 list_push_front(&netdev->saved_flags_list, &sf->node);
1011 sf->saved_flags = changed_flags;
1012 sf->saved_values = changed_flags & new_flags;
1015 ovs_mutex_unlock(&netdev_mutex);
1020 *old_flagsp = old_flags;
1029 /* Obtains the current flags for 'netdev' and stores them into '*flagsp'.
1030 * Returns 0 if successful, otherwise a positive errno value. On failure,
1031 * stores 0 into '*flagsp'. */
1033 netdev_get_flags(const struct netdev *netdev_, enum netdev_flags *flagsp)
1035 struct netdev *netdev = CONST_CAST(struct netdev *, netdev_);
1036 return do_update_flags(netdev, 0, 0, flagsp, NULL);
1039 /* Sets the flags for 'netdev' to 'flags'.
1040 * Returns 0 if successful, otherwise a positive errno value. */
1042 netdev_set_flags(struct netdev *netdev, enum netdev_flags flags,
1043 struct netdev_saved_flags **sfp)
1045 return do_update_flags(netdev, -1, flags, NULL, sfp);
1048 /* Turns on the specified 'flags' on 'netdev':
1050 * - On success, returns 0. If 'sfp' is nonnull, sets '*sfp' to a newly
1051 * allocated 'struct netdev_saved_flags *' that may be passed to
1052 * netdev_restore_flags() to restore the original values of 'flags' on
1053 * 'netdev' (this will happen automatically at program termination if
1054 * netdev_restore_flags() is never called) , or to NULL if no flags were
1057 * - On failure, returns a positive errno value. If 'sfp' is nonnull, sets
1058 * '*sfp' to NULL. */
1060 netdev_turn_flags_on(struct netdev *netdev, enum netdev_flags flags,
1061 struct netdev_saved_flags **sfp)
1063 return do_update_flags(netdev, 0, flags, NULL, sfp);
1066 /* Turns off the specified 'flags' on 'netdev'. See netdev_turn_flags_on() for
1067 * details of the interface. */
1069 netdev_turn_flags_off(struct netdev *netdev, enum netdev_flags flags,
1070 struct netdev_saved_flags **sfp)
1072 return do_update_flags(netdev, flags, 0, NULL, sfp);
1075 /* Restores the flags that were saved in 'sf', and destroys 'sf'.
1076 * Does nothing if 'sf' is NULL. */
1078 netdev_restore_flags(struct netdev_saved_flags *sf)
1079 OVS_EXCLUDED(netdev_mutex)
1082 struct netdev *netdev = sf->netdev;
1083 enum netdev_flags old_flags;
1085 netdev->netdev_class->update_flags(netdev,
1086 sf->saved_flags & sf->saved_values,
1087 sf->saved_flags & ~sf->saved_values,
1090 ovs_mutex_lock(&netdev_mutex);
1091 list_remove(&sf->node);
1093 netdev_unref(netdev);
1097 /* Looks up the ARP table entry for 'ip' on 'netdev'. If one exists and can be
1098 * successfully retrieved, it stores the corresponding MAC address in 'mac' and
1099 * returns 0. Otherwise, it returns a positive errno value; in particular,
1100 * ENXIO indicates that there is no ARP table entry for 'ip' on 'netdev'. */
1102 netdev_arp_lookup(const struct netdev *netdev,
1103 ovs_be32 ip, uint8_t mac[ETH_ADDR_LEN])
1105 int error = (netdev->netdev_class->arp_lookup
1106 ? netdev->netdev_class->arp_lookup(netdev, ip, mac)
1109 memset(mac, 0, ETH_ADDR_LEN);
1114 /* Returns true if carrier is active (link light is on) on 'netdev'. */
1116 netdev_get_carrier(const struct netdev *netdev)
1119 enum netdev_flags flags;
1122 netdev_get_flags(netdev, &flags);
1123 if (!(flags & NETDEV_UP)) {
1127 if (!netdev->netdev_class->get_carrier) {
1131 error = netdev->netdev_class->get_carrier(netdev, &carrier);
1133 VLOG_DBG("%s: failed to get network device carrier status, assuming "
1134 "down: %s", netdev_get_name(netdev), ovs_strerror(error));
1141 /* Returns the number of times 'netdev''s carrier has changed. */
1143 netdev_get_carrier_resets(const struct netdev *netdev)
1145 return (netdev->netdev_class->get_carrier_resets
1146 ? netdev->netdev_class->get_carrier_resets(netdev)
1150 /* Attempts to force netdev_get_carrier() to poll 'netdev''s MII registers for
1151 * link status instead of checking 'netdev''s carrier. 'netdev''s MII
1152 * registers will be polled once ever 'interval' milliseconds. If 'netdev'
1153 * does not support MII, another method may be used as a fallback. If
1154 * 'interval' is less than or equal to zero, reverts netdev_get_carrier() to
1155 * its normal behavior.
1157 * Returns 0 if successful, otherwise a positive errno value. */
1159 netdev_set_miimon_interval(struct netdev *netdev, long long int interval)
1161 return (netdev->netdev_class->set_miimon_interval
1162 ? netdev->netdev_class->set_miimon_interval(netdev, interval)
1166 /* Retrieves current device stats for 'netdev'. */
1168 netdev_get_stats(const struct netdev *netdev, struct netdev_stats *stats)
1172 COVERAGE_INC(netdev_get_stats);
1173 error = (netdev->netdev_class->get_stats
1174 ? netdev->netdev_class->get_stats(netdev, stats)
1177 memset(stats, 0xff, sizeof *stats);
1182 /* Attempts to change the stats for 'netdev' to those provided in 'stats'.
1183 * Returns 0 if successful, otherwise a positive errno value.
1185 * This will probably fail for most network devices. Some devices might only
1186 * allow setting their stats to 0. */
1188 netdev_set_stats(struct netdev *netdev, const struct netdev_stats *stats)
1190 return (netdev->netdev_class->set_stats
1191 ? netdev->netdev_class->set_stats(netdev, stats)
1195 /* Attempts to set input rate limiting (policing) policy, such that up to
1196 * 'kbits_rate' kbps of traffic is accepted, with a maximum accumulative burst
1197 * size of 'kbits' kb. */
1199 netdev_set_policing(struct netdev *netdev, uint32_t kbits_rate,
1200 uint32_t kbits_burst)
1202 return (netdev->netdev_class->set_policing
1203 ? netdev->netdev_class->set_policing(netdev,
1204 kbits_rate, kbits_burst)
1208 /* Adds to 'types' all of the forms of QoS supported by 'netdev', or leaves it
1209 * empty if 'netdev' does not support QoS. Any names added to 'types' should
1210 * be documented as valid for the "type" column in the "QoS" table in
1211 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1213 * Every network device supports disabling QoS with a type of "", but this type
1214 * will not be added to 'types'.
1216 * The caller must initialize 'types' (e.g. with sset_init()) before calling
1217 * this function. The caller is responsible for destroying 'types' (e.g. with
1218 * sset_destroy()) when it is no longer needed.
1220 * Returns 0 if successful, otherwise a positive errno value. */
1222 netdev_get_qos_types(const struct netdev *netdev, struct sset *types)
1224 const struct netdev_class *class = netdev->netdev_class;
1225 return (class->get_qos_types
1226 ? class->get_qos_types(netdev, types)
1230 /* Queries 'netdev' for its capabilities regarding the specified 'type' of QoS,
1231 * which should be "" or one of the types returned by netdev_get_qos_types()
1232 * for 'netdev'. Returns 0 if successful, otherwise a positive errno value.
1233 * On success, initializes 'caps' with the QoS capabilities; on failure, clears
1234 * 'caps' to all zeros. */
1236 netdev_get_qos_capabilities(const struct netdev *netdev, const char *type,
1237 struct netdev_qos_capabilities *caps)
1239 const struct netdev_class *class = netdev->netdev_class;
1242 int retval = (class->get_qos_capabilities
1243 ? class->get_qos_capabilities(netdev, type, caps)
1246 memset(caps, 0, sizeof *caps);
1250 /* Every netdev supports turning off QoS. */
1251 memset(caps, 0, sizeof *caps);
1256 /* Obtains the number of queues supported by 'netdev' for the specified 'type'
1257 * of QoS. Returns 0 if successful, otherwise a positive errno value. Stores
1258 * the number of queues (zero on failure) in '*n_queuesp'.
1260 * This is just a simple wrapper around netdev_get_qos_capabilities(). */
1262 netdev_get_n_queues(const struct netdev *netdev,
1263 const char *type, unsigned int *n_queuesp)
1265 struct netdev_qos_capabilities caps;
1268 retval = netdev_get_qos_capabilities(netdev, type, &caps);
1269 *n_queuesp = caps.n_queues;
1273 /* Queries 'netdev' about its currently configured form of QoS. If successful,
1274 * stores the name of the current form of QoS into '*typep', stores any details
1275 * of configuration as string key-value pairs in 'details', and returns 0. On
1276 * failure, sets '*typep' to NULL and returns a positive errno value.
1278 * A '*typep' of "" indicates that QoS is currently disabled on 'netdev'.
1280 * The caller must initialize 'details' as an empty smap (e.g. with
1281 * smap_init()) before calling this function. The caller must free 'details'
1282 * when it is no longer needed (e.g. with smap_destroy()).
1284 * The caller must not modify or free '*typep'.
1286 * '*typep' will be one of the types returned by netdev_get_qos_types() for
1287 * 'netdev'. The contents of 'details' should be documented as valid for
1288 * '*typep' in the "other_config" column in the "QoS" table in
1289 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)). */
1291 netdev_get_qos(const struct netdev *netdev,
1292 const char **typep, struct smap *details)
1294 const struct netdev_class *class = netdev->netdev_class;
1297 if (class->get_qos) {
1298 retval = class->get_qos(netdev, typep, details);
1301 smap_clear(details);
1305 /* 'netdev' doesn't support QoS, so report that QoS is disabled. */
1311 /* Attempts to reconfigure QoS on 'netdev', changing the form of QoS to 'type'
1312 * with details of configuration from 'details'. Returns 0 if successful,
1313 * otherwise a positive errno value. On error, the previous QoS configuration
1316 * When this function changes the type of QoS (not just 'details'), this also
1317 * resets all queue configuration for 'netdev' to their defaults (which depend
1318 * on the specific type of QoS). Otherwise, the queue configuration for
1319 * 'netdev' is unchanged.
1321 * 'type' should be "" (to disable QoS) or one of the types returned by
1322 * netdev_get_qos_types() for 'netdev'. The contents of 'details' should be
1323 * documented as valid for the given 'type' in the "other_config" column in the
1324 * "QoS" table in vswitchd/vswitch.xml (which is built as
1325 * ovs-vswitchd.conf.db(8)).
1327 * NULL may be specified for 'details' if there are no configuration
1330 netdev_set_qos(struct netdev *netdev,
1331 const char *type, const struct smap *details)
1333 const struct netdev_class *class = netdev->netdev_class;
1339 if (class->set_qos) {
1341 static const struct smap empty = SMAP_INITIALIZER(&empty);
1344 return class->set_qos(netdev, type, details);
1346 return *type ? EOPNOTSUPP : 0;
1350 /* Queries 'netdev' for information about the queue numbered 'queue_id'. If
1351 * successful, adds that information as string key-value pairs to 'details'.
1352 * Returns 0 if successful, otherwise a positive errno value.
1354 * 'queue_id' must be less than the number of queues supported by 'netdev' for
1355 * the current form of QoS (e.g. as returned by netdev_get_n_queues(netdev)).
1357 * The returned contents of 'details' should be documented as valid for the
1358 * given 'type' in the "other_config" column in the "Queue" table in
1359 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1361 * The caller must initialize 'details' (e.g. with smap_init()) before calling
1362 * this function. The caller must free 'details' when it is no longer needed
1363 * (e.g. with smap_destroy()). */
1365 netdev_get_queue(const struct netdev *netdev,
1366 unsigned int queue_id, struct smap *details)
1368 const struct netdev_class *class = netdev->netdev_class;
1371 retval = (class->get_queue
1372 ? class->get_queue(netdev, queue_id, details)
1375 smap_clear(details);
1380 /* Configures the queue numbered 'queue_id' on 'netdev' with the key-value
1381 * string pairs in 'details'. The contents of 'details' should be documented
1382 * as valid for the given 'type' in the "other_config" column in the "Queue"
1383 * table in vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1384 * Returns 0 if successful, otherwise a positive errno value. On failure, the
1385 * given queue's configuration should be unmodified.
1387 * 'queue_id' must be less than the number of queues supported by 'netdev' for
1388 * the current form of QoS (e.g. as returned by netdev_get_n_queues(netdev)).
1390 * This function does not modify 'details', and the caller retains ownership of
1393 netdev_set_queue(struct netdev *netdev,
1394 unsigned int queue_id, const struct smap *details)
1396 const struct netdev_class *class = netdev->netdev_class;
1397 return (class->set_queue
1398 ? class->set_queue(netdev, queue_id, details)
1402 /* Attempts to delete the queue numbered 'queue_id' from 'netdev'. Some kinds
1403 * of QoS may have a fixed set of queues, in which case attempts to delete them
1404 * will fail with EOPNOTSUPP.
1406 * Returns 0 if successful, otherwise a positive errno value. On failure, the
1407 * given queue will be unmodified.
1409 * 'queue_id' must be less than the number of queues supported by 'netdev' for
1410 * the current form of QoS (e.g. as returned by
1411 * netdev_get_n_queues(netdev)). */
1413 netdev_delete_queue(struct netdev *netdev, unsigned int queue_id)
1415 const struct netdev_class *class = netdev->netdev_class;
1416 return (class->delete_queue
1417 ? class->delete_queue(netdev, queue_id)
1421 /* Obtains statistics about 'queue_id' on 'netdev'. On success, returns 0 and
1422 * fills 'stats' with the queue's statistics; individual members of 'stats' may
1423 * be set to all-1-bits if the statistic is unavailable. On failure, returns a
1424 * positive errno value and fills 'stats' with values indicating unsupported
1427 netdev_get_queue_stats(const struct netdev *netdev, unsigned int queue_id,
1428 struct netdev_queue_stats *stats)
1430 const struct netdev_class *class = netdev->netdev_class;
1433 retval = (class->get_queue_stats
1434 ? class->get_queue_stats(netdev, queue_id, stats)
1437 stats->tx_bytes = UINT64_MAX;
1438 stats->tx_packets = UINT64_MAX;
1439 stats->tx_errors = UINT64_MAX;
1440 stats->created = LLONG_MIN;
1445 /* Initializes 'dump' to begin dumping the queues in a netdev.
1447 * This function provides no status indication. An error status for the entire
1448 * dump operation is provided when it is completed by calling
1449 * netdev_queue_dump_done().
1452 netdev_queue_dump_start(struct netdev_queue_dump *dump,
1453 const struct netdev *netdev)
1455 dump->netdev = netdev_ref(netdev);
1456 if (netdev->netdev_class->queue_dump_start) {
1457 dump->error = netdev->netdev_class->queue_dump_start(netdev,
1460 dump->error = EOPNOTSUPP;
1464 /* Attempts to retrieve another queue from 'dump', which must have been
1465 * initialized with netdev_queue_dump_start(). On success, stores a new queue
1466 * ID into '*queue_id', fills 'details' with configuration details for the
1467 * queue, and returns true. On failure, returns false.
1469 * Queues are not necessarily dumped in increasing order of queue ID (or any
1470 * other predictable order).
1472 * Failure might indicate an actual error or merely that the last queue has
1473 * been dumped. An error status for the entire dump operation is provided when
1474 * it is completed by calling netdev_queue_dump_done().
1476 * The returned contents of 'details' should be documented as valid for the
1477 * given 'type' in the "other_config" column in the "Queue" table in
1478 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1480 * The caller must initialize 'details' (e.g. with smap_init()) before calling
1481 * this function. This function will clear and replace its contents. The
1482 * caller must free 'details' when it is no longer needed (e.g. with
1483 * smap_destroy()). */
1485 netdev_queue_dump_next(struct netdev_queue_dump *dump,
1486 unsigned int *queue_id, struct smap *details)
1488 const struct netdev *netdev = dump->netdev;
1494 dump->error = netdev->netdev_class->queue_dump_next(netdev, dump->state,
1498 netdev->netdev_class->queue_dump_done(netdev, dump->state);
1504 /* Completes queue table dump operation 'dump', which must have been
1505 * initialized with netdev_queue_dump_start(). Returns 0 if the dump operation
1506 * was error-free, otherwise a positive errno value describing the problem. */
1508 netdev_queue_dump_done(struct netdev_queue_dump *dump)
1510 const struct netdev *netdev = dump->netdev;
1511 if (!dump->error && netdev->netdev_class->queue_dump_done) {
1512 dump->error = netdev->netdev_class->queue_dump_done(netdev,
1515 netdev_close(dump->netdev);
1516 return dump->error == EOF ? 0 : dump->error;
1519 /* Iterates over all of 'netdev''s queues, calling 'cb' with the queue's ID,
1520 * its statistics, and the 'aux' specified by the caller. The order of
1521 * iteration is unspecified, but (when successful) each queue is visited
1524 * Calling this function may be more efficient than calling
1525 * netdev_get_queue_stats() for every queue.
1527 * 'cb' must not modify or free the statistics passed in.
1529 * Returns 0 if successful, otherwise a positive errno value. On error, some
1530 * configured queues may not have been included in the iteration. */
1532 netdev_dump_queue_stats(const struct netdev *netdev,
1533 netdev_dump_queue_stats_cb *cb, void *aux)
1535 const struct netdev_class *class = netdev->netdev_class;
1536 return (class->dump_queue_stats
1537 ? class->dump_queue_stats(netdev, cb, aux)
1542 /* Returns the class type of 'netdev'.
1544 * The caller must not free the returned value. */
1546 netdev_get_type(const struct netdev *netdev)
1548 return netdev->netdev_class->type;
1551 /* Returns the class associated with 'netdev'. */
1552 const struct netdev_class *
1553 netdev_get_class(const struct netdev *netdev)
1555 return netdev->netdev_class;
1558 /* Returns the netdev with 'name' or NULL if there is none.
1560 * The caller must free the returned netdev with netdev_close(). */
1562 netdev_from_name(const char *name)
1563 OVS_EXCLUDED(netdev_mutex)
1565 struct netdev *netdev;
1567 ovs_mutex_lock(&netdev_mutex);
1568 netdev = shash_find_data(&netdev_shash, name);
1572 ovs_mutex_unlock(&netdev_mutex);
1577 /* Fills 'device_list' with devices that match 'netdev_class'.
1579 * The caller is responsible for initializing and destroying 'device_list' and
1580 * must close each device on the list. */
1582 netdev_get_devices(const struct netdev_class *netdev_class,
1583 struct shash *device_list)
1584 OVS_EXCLUDED(netdev_mutex)
1586 struct shash_node *node;
1588 ovs_mutex_lock(&netdev_mutex);
1589 SHASH_FOR_EACH (node, &netdev_shash) {
1590 struct netdev *dev = node->data;
1592 if (dev->netdev_class == netdev_class) {
1594 shash_add(device_list, node->name, node->data);
1597 ovs_mutex_unlock(&netdev_mutex);
1601 netdev_get_type_from_name(const char *name)
1603 struct netdev *dev = netdev_from_name(name);
1604 const char *type = dev ? netdev_get_type(dev) : NULL;
1610 netdev_rx_get_netdev(const struct netdev_rx *rx)
1612 ovs_assert(rx->netdev->ref_cnt > 0);
1617 netdev_rx_get_name(const struct netdev_rx *rx)
1619 return netdev_get_name(netdev_rx_get_netdev(rx));
1623 restore_all_flags(void *aux OVS_UNUSED)
1625 struct shash_node *node;
1627 SHASH_FOR_EACH (node, &netdev_shash) {
1628 struct netdev *netdev = node->data;
1629 const struct netdev_saved_flags *sf;
1630 enum netdev_flags saved_values;
1631 enum netdev_flags saved_flags;
1633 saved_values = saved_flags = 0;
1634 LIST_FOR_EACH (sf, node, &netdev->saved_flags_list) {
1635 saved_flags |= sf->saved_flags;
1636 saved_values &= ~sf->saved_flags;
1637 saved_values |= sf->saved_flags & sf->saved_values;
1640 enum netdev_flags old_flags;
1642 netdev->netdev_class->update_flags(netdev,
1643 saved_flags & saved_values,
1644 saved_flags & ~saved_values,