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_initialize(void)
95 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
97 static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
99 if (ovsthread_once_start(&once)) {
100 ovs_mutex_init_recursive(&netdev_class_mutex);
102 fatal_signal_add_hook(restore_all_flags, NULL, NULL, true);
103 netdev_vport_patch_register();
106 netdev_register_provider(&netdev_linux_class);
107 netdev_register_provider(&netdev_internal_class);
108 netdev_register_provider(&netdev_tap_class);
109 netdev_vport_tunnel_register();
111 #if defined(__FreeBSD__) || defined(__NetBSD__)
112 netdev_register_provider(&netdev_tap_class);
113 netdev_register_provider(&netdev_bsd_class);
116 ovsthread_once_done(&once);
120 /* Performs periodic work needed by all the various kinds of netdevs.
122 * If your program opens any netdevs, it must call this function within its
126 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
128 struct netdev_registered_class *rc;
130 ovs_mutex_lock(&netdev_class_mutex);
131 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
132 if (rc->class->run) {
136 ovs_mutex_unlock(&netdev_class_mutex);
139 /* Arranges for poll_block() to wake up when netdev_run() needs to be called.
141 * If your program opens any netdevs, it must call this function within its
145 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
147 struct netdev_registered_class *rc;
149 ovs_mutex_lock(&netdev_class_mutex);
150 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
151 if (rc->class->wait) {
155 ovs_mutex_unlock(&netdev_class_mutex);
158 static struct netdev_registered_class *
159 netdev_lookup_class(const char *type)
160 OVS_REQ_RDLOCK(netdev_class_mutex)
162 struct netdev_registered_class *rc;
164 HMAP_FOR_EACH_WITH_HASH (rc, hmap_node, hash_string(type, 0),
166 if (!strcmp(type, rc->class->type)) {
173 /* Initializes and registers a new netdev provider. After successful
174 * registration, new netdevs of that type can be opened using netdev_open(). */
176 netdev_register_provider(const struct netdev_class *new_class)
177 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
181 ovs_mutex_lock(&netdev_class_mutex);
182 if (netdev_lookup_class(new_class->type)) {
183 VLOG_WARN("attempted to register duplicate netdev provider: %s",
187 error = new_class->init ? new_class->init() : 0;
189 struct netdev_registered_class *rc;
191 rc = xmalloc(sizeof *rc);
192 hmap_insert(&netdev_classes, &rc->hmap_node,
193 hash_string(new_class->type, 0));
194 rc->class = new_class;
195 atomic_init(&rc->ref_cnt, 0);
197 VLOG_ERR("failed to initialize %s network device class: %s",
198 new_class->type, ovs_strerror(error));
201 ovs_mutex_unlock(&netdev_class_mutex);
206 /* Unregisters a netdev provider. 'type' must have been previously
207 * registered and not currently be in use by any netdevs. After unregistration
208 * new netdevs of that type cannot be opened using netdev_open(). */
210 netdev_unregister_provider(const char *type)
211 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
213 struct netdev_registered_class *rc;
216 ovs_mutex_lock(&netdev_class_mutex);
217 rc = netdev_lookup_class(type);
219 VLOG_WARN("attempted to unregister a netdev provider that is not "
220 "registered: %s", type);
221 error = EAFNOSUPPORT;
225 atomic_read(&rc->ref_cnt, &ref_cnt);
227 hmap_remove(&netdev_classes, &rc->hmap_node);
228 atomic_destroy(&rc->ref_cnt);
232 VLOG_WARN("attempted to unregister in use netdev provider: %s",
237 ovs_mutex_unlock(&netdev_class_mutex);
242 /* Clears 'types' and enumerates the types of all currently registered netdev
243 * providers into it. The caller must first initialize the sset. */
245 netdev_enumerate_types(struct sset *types)
246 OVS_EXCLUDED(netdev_mutex)
248 struct netdev_registered_class *rc;
253 ovs_mutex_lock(&netdev_class_mutex);
254 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
255 sset_add(types, rc->class->type);
257 ovs_mutex_unlock(&netdev_class_mutex);
260 /* Check that the network device name is not the same as any of the registered
261 * vport providers' dpif_port name (dpif_port is NULL if the vport provider
262 * does not define it) or the datapath internal port name (e.g. ovs-system).
264 * Returns true if there is a name conflict, false otherwise. */
266 netdev_is_reserved_name(const char *name)
267 OVS_EXCLUDED(netdev_mutex)
269 struct netdev_registered_class *rc;
273 ovs_mutex_lock(&netdev_class_mutex);
274 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
275 const char *dpif_port = netdev_vport_class_get_dpif_port(rc->class);
276 if (dpif_port && !strcmp(dpif_port, name)) {
277 ovs_mutex_unlock(&netdev_class_mutex);
281 ovs_mutex_unlock(&netdev_class_mutex);
283 if (!strncmp(name, "ovs-", 4)) {
288 dp_enumerate_types(&types);
289 SSET_FOR_EACH (type, &types) {
290 if (!strcmp(name+4, type)) {
291 sset_destroy(&types);
295 sset_destroy(&types);
301 /* Opens the network device named 'name' (e.g. "eth0") of the specified 'type'
302 * (e.g. "system") and returns zero if successful, otherwise a positive errno
303 * value. On success, sets '*netdevp' to the new network device, otherwise to
306 * Some network devices may need to be configured (with netdev_set_config())
307 * before they can be used. */
309 netdev_open(const char *name, const char *type, struct netdev **netdevp)
310 OVS_EXCLUDED(netdev_mutex)
312 struct netdev *netdev;
317 ovs_mutex_lock(&netdev_class_mutex);
318 ovs_mutex_lock(&netdev_mutex);
319 netdev = shash_find_data(&netdev_shash, name);
321 struct netdev_registered_class *rc;
323 rc = netdev_lookup_class(type && type[0] ? type : "system");
325 netdev = rc->class->alloc();
327 memset(netdev, 0, sizeof *netdev);
328 netdev->netdev_class = rc->class;
329 netdev->name = xstrdup(name);
330 netdev->node = shash_add(&netdev_shash, name, netdev);
331 list_init(&netdev->saved_flags_list);
333 error = rc->class->construct(netdev);
337 atomic_add(&rc->ref_cnt, 1, &old_ref_cnt);
338 seq_change(connectivity_seq_get());
341 ovs_assert(list_is_empty(&netdev->saved_flags_list));
342 shash_delete(&netdev_shash, netdev->node);
343 rc->class->dealloc(netdev);
349 VLOG_WARN("could not create netdev %s of unknown type %s",
351 error = EAFNOSUPPORT;
357 ovs_mutex_unlock(&netdev_mutex);
358 ovs_mutex_unlock(&netdev_class_mutex);
369 /* Returns a reference to 'netdev_' for the caller to own. Returns null if
370 * 'netdev_' is null. */
372 netdev_ref(const struct netdev *netdev_)
373 OVS_EXCLUDED(netdev_mutex)
375 struct netdev *netdev = CONST_CAST(struct netdev *, netdev_);
378 ovs_mutex_lock(&netdev_mutex);
379 ovs_assert(netdev->ref_cnt > 0);
381 ovs_mutex_unlock(&netdev_mutex);
386 /* Reconfigures the device 'netdev' with 'args'. 'args' may be empty
387 * or NULL if none are needed. */
389 netdev_set_config(struct netdev *netdev, const struct smap *args)
390 OVS_EXCLUDED(netdev_mutex)
392 if (netdev->netdev_class->set_config) {
393 const struct smap no_args = SMAP_INITIALIZER(&no_args);
396 error = netdev->netdev_class->set_config(netdev,
397 args ? args : &no_args);
399 VLOG_WARN("%s: could not set configuration (%s)",
400 netdev_get_name(netdev), ovs_strerror(error));
403 } else if (args && !smap_is_empty(args)) {
404 VLOG_WARN("%s: arguments provided to device that is not configurable",
405 netdev_get_name(netdev));
410 /* Returns the current configuration for 'netdev' in 'args'. The caller must
411 * have already initialized 'args' with smap_init(). Returns 0 on success, in
412 * which case 'args' will be filled with 'netdev''s configuration. On failure
413 * returns a positive errno value, in which case 'args' will be empty.
415 * The caller owns 'args' and its contents and must eventually free them with
418 netdev_get_config(const struct netdev *netdev, struct smap *args)
419 OVS_EXCLUDED(netdev_mutex)
424 if (netdev->netdev_class->get_config) {
425 error = netdev->netdev_class->get_config(netdev, args);
436 const struct netdev_tunnel_config *
437 netdev_get_tunnel_config(const struct netdev *netdev)
438 OVS_EXCLUDED(netdev_mutex)
440 if (netdev->netdev_class->get_tunnel_config) {
441 return netdev->netdev_class->get_tunnel_config(netdev);
448 netdev_unref(struct netdev *dev)
449 OVS_RELEASES(netdev_mutex)
451 ovs_assert(dev->ref_cnt);
452 if (!--dev->ref_cnt) {
453 const struct netdev_class *class = dev->netdev_class;
454 struct netdev_registered_class *rc;
457 dev->netdev_class->destruct(dev);
459 shash_delete(&netdev_shash, dev->node);
461 dev->netdev_class->dealloc(dev);
462 ovs_mutex_unlock(&netdev_mutex);
464 ovs_mutex_lock(&netdev_class_mutex);
465 rc = netdev_lookup_class(class->type);
466 atomic_sub(&rc->ref_cnt, 1, &old_ref_cnt);
467 ovs_assert(old_ref_cnt > 0);
468 ovs_mutex_unlock(&netdev_class_mutex);
470 ovs_mutex_unlock(&netdev_mutex);
474 /* Closes and destroys 'netdev'. */
476 netdev_close(struct netdev *netdev)
477 OVS_EXCLUDED(netdev_mutex)
480 ovs_mutex_lock(&netdev_mutex);
481 netdev_unref(netdev);
485 /* Parses 'netdev_name_', which is of the form [type@]name into its component
486 * pieces. 'name' and 'type' must be freed by the caller. */
488 netdev_parse_name(const char *netdev_name_, char **name, char **type)
490 char *netdev_name = xstrdup(netdev_name_);
493 separator = strchr(netdev_name, '@');
497 *name = xstrdup(separator + 1);
500 *type = xstrdup("system");
504 /* Attempts to open a netdev_rx handle for obtaining packets received on
505 * 'netdev'. On success, returns 0 and stores a nonnull 'netdev_rx *' into
506 * '*rxp'. On failure, returns a positive errno value and stores NULL into
509 * Some kinds of network devices might not support receiving packets. This
510 * function returns EOPNOTSUPP in that case.*/
512 netdev_rx_open(struct netdev *netdev, struct netdev_rx **rxp)
513 OVS_EXCLUDED(netdev_mutex)
517 if (netdev->netdev_class->rx_alloc) {
518 struct netdev_rx *rx = netdev->netdev_class->rx_alloc();
521 error = netdev->netdev_class->rx_construct(rx);
523 ovs_mutex_lock(&netdev_mutex);
525 ovs_mutex_unlock(&netdev_mutex);
530 netdev->netdev_class->rx_dealloc(rx);
544 netdev_rx_close(struct netdev_rx *rx)
545 OVS_EXCLUDED(netdev_mutex)
548 struct netdev *netdev = rx->netdev;
549 netdev->netdev_class->rx_destruct(rx);
550 netdev->netdev_class->rx_dealloc(rx);
551 netdev_close(netdev);
555 /* Attempts to receive a packet from 'rx' into the tailroom of 'buffer', which
556 * must initially be empty. If successful, returns 0 and increments
557 * 'buffer->size' by the number of bytes in the received packet, otherwise a
558 * positive errno value.
560 * Returns EAGAIN immediately if no packet is ready to be received.
562 * Returns EMSGSIZE, and discards the packet, if the received packet is longer
563 * than 'ofpbuf_tailroom(buffer)'.
565 * Implementations may make use of VLAN_HEADER_LEN bytes of tailroom to
566 * add a VLAN header which is obtained out-of-band to the packet. If
567 * this occurs then VLAN_HEADER_LEN bytes of tailroom will no longer be
568 * available for the packet, otherwise it may be used for the packet
571 * It is advised that the tailroom of 'buffer' should be
572 * VLAN_HEADER_LEN bytes longer than the MTU to allow space for an
573 * out-of-band VLAN header to be added to the packet. At the very least,
574 * 'buffer' must have at least ETH_TOTAL_MIN bytes of tailroom.
576 * This function may be set to null if it would always return EOPNOTSUPP
579 netdev_rx_recv(struct netdev_rx *rx, struct ofpbuf *buffer)
583 ovs_assert(buffer->size == 0);
584 ovs_assert(ofpbuf_tailroom(buffer) >= ETH_TOTAL_MIN);
586 retval = rx->netdev->netdev_class->rx_recv(rx, buffer);
588 COVERAGE_INC(netdev_received);
589 if (buffer->size < ETH_TOTAL_MIN) {
590 ofpbuf_put_zeros(buffer, ETH_TOTAL_MIN - buffer->size);
598 /* Arranges for poll_block() to wake up when a packet is ready to be received
601 netdev_rx_wait(struct netdev_rx *rx)
603 rx->netdev->netdev_class->rx_wait(rx);
606 /* Discards any packets ready to be received on 'rx'. */
608 netdev_rx_drain(struct netdev_rx *rx)
610 return (rx->netdev->netdev_class->rx_drain
611 ? rx->netdev->netdev_class->rx_drain(rx)
615 /* Sends 'buffer' on 'netdev'. Returns 0 if successful, otherwise a positive
616 * errno value. Returns EAGAIN without blocking if the packet cannot be queued
617 * immediately. Returns EMSGSIZE if a partial packet was transmitted or if
618 * the packet is too big or too small to transmit on the device.
620 * The caller retains ownership of 'buffer' in all cases.
622 * The kernel maintains a packet transmission queue, so the caller is not
623 * expected to do additional queuing of packets.
625 * Some network devices may not implement support for this function. In such
626 * cases this function will always return EOPNOTSUPP. */
628 netdev_send(struct netdev *netdev, const struct ofpbuf *buffer)
632 error = (netdev->netdev_class->send
633 ? netdev->netdev_class->send(netdev, buffer->data, buffer->size)
636 COVERAGE_INC(netdev_sent);
641 /* Registers with the poll loop to wake up from the next call to poll_block()
642 * when the packet transmission queue has sufficient room to transmit a packet
643 * with netdev_send().
645 * The kernel maintains a packet transmission queue, so the client is not
646 * expected to do additional queuing of packets. Thus, this function is
647 * unlikely to ever be used. It is included for completeness. */
649 netdev_send_wait(struct netdev *netdev)
651 if (netdev->netdev_class->send_wait) {
652 netdev->netdev_class->send_wait(netdev);
656 /* Attempts to set 'netdev''s MAC address to 'mac'. Returns 0 if successful,
657 * otherwise a positive errno value. */
659 netdev_set_etheraddr(struct netdev *netdev, const uint8_t mac[ETH_ADDR_LEN])
661 return netdev->netdev_class->set_etheraddr(netdev, mac);
664 /* Retrieves 'netdev''s MAC address. If successful, returns 0 and copies the
665 * the MAC address into 'mac'. On failure, returns a positive errno value and
666 * clears 'mac' to all-zeros. */
668 netdev_get_etheraddr(const struct netdev *netdev, uint8_t mac[ETH_ADDR_LEN])
670 return netdev->netdev_class->get_etheraddr(netdev, mac);
673 /* Returns the name of the network device that 'netdev' represents,
674 * e.g. "eth0". The caller must not modify or free the returned string. */
676 netdev_get_name(const struct netdev *netdev)
681 /* Retrieves the MTU of 'netdev'. The MTU is the maximum size of transmitted
682 * (and received) packets, in bytes, not including the hardware header; thus,
683 * this is typically 1500 bytes for Ethernet devices.
685 * If successful, returns 0 and stores the MTU size in '*mtup'. Returns
686 * EOPNOTSUPP if 'netdev' does not have an MTU (as e.g. some tunnels do not).
687 * On other failure, returns a positive errno value. On failure, sets '*mtup'
690 netdev_get_mtu(const struct netdev *netdev, int *mtup)
692 const struct netdev_class *class = netdev->netdev_class;
695 error = class->get_mtu ? class->get_mtu(netdev, mtup) : EOPNOTSUPP;
698 if (error != EOPNOTSUPP) {
699 VLOG_DBG_RL(&rl, "failed to retrieve MTU for network device %s: "
700 "%s", netdev_get_name(netdev), ovs_strerror(error));
706 /* Sets the MTU of 'netdev'. The MTU is the maximum size of transmitted
707 * (and received) packets, in bytes.
709 * If successful, returns 0. Returns EOPNOTSUPP if 'netdev' does not have an
710 * MTU (as e.g. some tunnels do not). On other failure, returns a positive
713 netdev_set_mtu(const struct netdev *netdev, int mtu)
715 const struct netdev_class *class = netdev->netdev_class;
718 error = class->set_mtu ? class->set_mtu(netdev, mtu) : EOPNOTSUPP;
719 if (error && error != EOPNOTSUPP) {
720 VLOG_DBG_RL(&rl, "failed to set MTU for network device %s: %s",
721 netdev_get_name(netdev), ovs_strerror(error));
727 /* Returns the ifindex of 'netdev', if successful, as a positive number. On
728 * failure, returns a negative errno value.
730 * The desired semantics of the ifindex value are a combination of those
731 * specified by POSIX for if_nametoindex() and by SNMP for ifIndex. An ifindex
732 * value should be unique within a host and remain stable at least until
733 * reboot. SNMP says an ifindex "ranges between 1 and the value of ifNumber"
734 * but many systems do not follow this rule anyhow.
736 * Some network devices may not implement support for this function. In such
737 * cases this function will always return -EOPNOTSUPP.
740 netdev_get_ifindex(const struct netdev *netdev)
742 int (*get_ifindex)(const struct netdev *);
744 get_ifindex = netdev->netdev_class->get_ifindex;
746 return get_ifindex ? get_ifindex(netdev) : -EOPNOTSUPP;
749 /* Stores the features supported by 'netdev' into each of '*current',
750 * '*advertised', '*supported', and '*peer' that are non-null. Each value is a
751 * bitmap of "enum ofp_port_features" bits, in host byte order. Returns 0 if
752 * successful, otherwise a positive errno value. On failure, all of the
753 * passed-in values are set to 0.
755 * Some network devices may not implement support for this function. In such
756 * cases this function will always return EOPNOTSUPP. */
758 netdev_get_features(const struct netdev *netdev,
759 enum netdev_features *current,
760 enum netdev_features *advertised,
761 enum netdev_features *supported,
762 enum netdev_features *peer)
764 int (*get_features)(const struct netdev *netdev,
765 enum netdev_features *current,
766 enum netdev_features *advertised,
767 enum netdev_features *supported,
768 enum netdev_features *peer);
769 enum netdev_features dummy[4];
776 advertised = &dummy[1];
779 supported = &dummy[2];
785 get_features = netdev->netdev_class->get_features;
787 ? get_features(netdev, current, advertised, supported,
791 *current = *advertised = *supported = *peer = 0;
796 /* Returns the maximum speed of a network connection that has the NETDEV_F_*
797 * bits in 'features', in bits per second. If no bits that indicate a speed
798 * are set in 'features', returns 'default_bps'. */
800 netdev_features_to_bps(enum netdev_features features,
801 uint64_t default_bps)
804 F_1000000MB = NETDEV_F_1TB_FD,
805 F_100000MB = NETDEV_F_100GB_FD,
806 F_40000MB = NETDEV_F_40GB_FD,
807 F_10000MB = NETDEV_F_10GB_FD,
808 F_1000MB = NETDEV_F_1GB_HD | NETDEV_F_1GB_FD,
809 F_100MB = NETDEV_F_100MB_HD | NETDEV_F_100MB_FD,
810 F_10MB = NETDEV_F_10MB_HD | NETDEV_F_10MB_FD
813 return ( features & F_1000000MB ? UINT64_C(1000000000000)
814 : features & F_100000MB ? UINT64_C(100000000000)
815 : features & F_40000MB ? UINT64_C(40000000000)
816 : features & F_10000MB ? UINT64_C(10000000000)
817 : features & F_1000MB ? UINT64_C(1000000000)
818 : features & F_100MB ? UINT64_C(100000000)
819 : features & F_10MB ? UINT64_C(10000000)
823 /* Returns true if any of the NETDEV_F_* bits that indicate a full-duplex link
824 * are set in 'features', otherwise false. */
826 netdev_features_is_full_duplex(enum netdev_features features)
828 return (features & (NETDEV_F_10MB_FD | NETDEV_F_100MB_FD | NETDEV_F_1GB_FD
829 | NETDEV_F_10GB_FD | NETDEV_F_40GB_FD
830 | NETDEV_F_100GB_FD | NETDEV_F_1TB_FD)) != 0;
833 /* Set the features advertised by 'netdev' to 'advertise'. Returns 0 if
834 * successful, otherwise a positive errno value. */
836 netdev_set_advertisements(struct netdev *netdev,
837 enum netdev_features advertise)
839 return (netdev->netdev_class->set_advertisements
840 ? netdev->netdev_class->set_advertisements(
845 /* If 'netdev' has an assigned IPv4 address, sets '*address' to that address
846 * and '*netmask' to its netmask and returns 0. Otherwise, returns a positive
847 * errno value and sets '*address' to 0 (INADDR_ANY).
849 * The following error values have well-defined meanings:
851 * - EADDRNOTAVAIL: 'netdev' has no assigned IPv4 address.
853 * - EOPNOTSUPP: No IPv4 network stack attached to 'netdev'.
855 * 'address' or 'netmask' or both may be null, in which case the address or
856 * netmask is not reported. */
858 netdev_get_in4(const struct netdev *netdev,
859 struct in_addr *address_, struct in_addr *netmask_)
861 struct in_addr address;
862 struct in_addr netmask;
865 error = (netdev->netdev_class->get_in4
866 ? netdev->netdev_class->get_in4(netdev,
870 address_->s_addr = error ? 0 : address.s_addr;
873 netmask_->s_addr = error ? 0 : netmask.s_addr;
878 /* Assigns 'addr' as 'netdev''s IPv4 address and 'mask' as its netmask. If
879 * 'addr' is INADDR_ANY, 'netdev''s IPv4 address is cleared. Returns a
880 * positive errno value. */
882 netdev_set_in4(struct netdev *netdev, struct in_addr addr, struct in_addr mask)
884 return (netdev->netdev_class->set_in4
885 ? netdev->netdev_class->set_in4(netdev, addr, mask)
889 /* Obtains ad IPv4 address from device name and save the address in
890 * in4. Returns 0 if successful, otherwise a positive errno value.
893 netdev_get_in4_by_name(const char *device_name, struct in_addr *in4)
895 struct netdev *netdev;
898 error = netdev_open(device_name, "system", &netdev);
900 in4->s_addr = htonl(0);
904 error = netdev_get_in4(netdev, in4, NULL);
905 netdev_close(netdev);
909 /* Adds 'router' as a default IP gateway for the TCP/IP stack that corresponds
912 netdev_add_router(struct netdev *netdev, struct in_addr router)
914 COVERAGE_INC(netdev_add_router);
915 return (netdev->netdev_class->add_router
916 ? netdev->netdev_class->add_router(netdev, router)
920 /* Looks up the next hop for 'host' for the TCP/IP stack that corresponds to
921 * 'netdev'. If a route cannot not be determined, sets '*next_hop' to 0,
922 * '*netdev_name' to null, and returns a positive errno value. Otherwise, if a
923 * next hop is found, stores the next hop gateway's address (0 if 'host' is on
924 * a directly connected network) in '*next_hop' and a copy of the name of the
925 * device to reach 'host' in '*netdev_name', and returns 0. The caller is
926 * responsible for freeing '*netdev_name' (by calling free()). */
928 netdev_get_next_hop(const struct netdev *netdev,
929 const struct in_addr *host, struct in_addr *next_hop,
932 int error = (netdev->netdev_class->get_next_hop
933 ? netdev->netdev_class->get_next_hop(
934 host, next_hop, netdev_name)
937 next_hop->s_addr = 0;
943 /* Populates 'smap' with status information.
945 * Populates 'smap' with 'netdev' specific status information. This
946 * information may be used to populate the status column of the Interface table
947 * as defined in ovs-vswitchd.conf.db(5). */
949 netdev_get_status(const struct netdev *netdev, struct smap *smap)
951 return (netdev->netdev_class->get_status
952 ? netdev->netdev_class->get_status(netdev, smap)
956 /* If 'netdev' has an assigned IPv6 address, sets '*in6' to that address and
957 * returns 0. Otherwise, returns a positive errno value and sets '*in6' to
958 * all-zero-bits (in6addr_any).
960 * The following error values have well-defined meanings:
962 * - EADDRNOTAVAIL: 'netdev' has no assigned IPv6 address.
964 * - EOPNOTSUPP: No IPv6 network stack attached to 'netdev'.
966 * 'in6' may be null, in which case the address itself is not reported. */
968 netdev_get_in6(const struct netdev *netdev, struct in6_addr *in6)
970 struct in6_addr dummy;
973 error = (netdev->netdev_class->get_in6
974 ? netdev->netdev_class->get_in6(netdev,
978 memset(in6, 0, sizeof *in6);
983 /* On 'netdev', turns off the flags in 'off' and then turns on the flags in
984 * 'on'. Returns 0 if successful, otherwise a positive errno value. */
986 do_update_flags(struct netdev *netdev, enum netdev_flags off,
987 enum netdev_flags on, enum netdev_flags *old_flagsp,
988 struct netdev_saved_flags **sfp)
989 OVS_EXCLUDED(netdev_mutex)
991 struct netdev_saved_flags *sf = NULL;
992 enum netdev_flags old_flags;
995 error = netdev->netdev_class->update_flags(netdev, off & ~on, on,
998 VLOG_WARN_RL(&rl, "failed to %s flags for network device %s: %s",
999 off || on ? "set" : "get", netdev_get_name(netdev),
1000 ovs_strerror(error));
1002 } else if ((off || on) && sfp) {
1003 enum netdev_flags new_flags = (old_flags & ~off) | on;
1004 enum netdev_flags changed_flags = old_flags ^ new_flags;
1005 if (changed_flags) {
1006 ovs_mutex_lock(&netdev_mutex);
1007 *sfp = sf = xmalloc(sizeof *sf);
1008 sf->netdev = netdev;
1009 list_push_front(&netdev->saved_flags_list, &sf->node);
1010 sf->saved_flags = changed_flags;
1011 sf->saved_values = changed_flags & new_flags;
1014 ovs_mutex_unlock(&netdev_mutex);
1019 *old_flagsp = old_flags;
1028 /* Obtains the current flags for 'netdev' and stores them into '*flagsp'.
1029 * Returns 0 if successful, otherwise a positive errno value. On failure,
1030 * stores 0 into '*flagsp'. */
1032 netdev_get_flags(const struct netdev *netdev_, enum netdev_flags *flagsp)
1034 struct netdev *netdev = CONST_CAST(struct netdev *, netdev_);
1035 return do_update_flags(netdev, 0, 0, flagsp, NULL);
1038 /* Sets the flags for 'netdev' to 'flags'.
1039 * Returns 0 if successful, otherwise a positive errno value. */
1041 netdev_set_flags(struct netdev *netdev, enum netdev_flags flags,
1042 struct netdev_saved_flags **sfp)
1044 return do_update_flags(netdev, -1, flags, NULL, sfp);
1047 /* Turns on the specified 'flags' on 'netdev':
1049 * - On success, returns 0. If 'sfp' is nonnull, sets '*sfp' to a newly
1050 * allocated 'struct netdev_saved_flags *' that may be passed to
1051 * netdev_restore_flags() to restore the original values of 'flags' on
1052 * 'netdev' (this will happen automatically at program termination if
1053 * netdev_restore_flags() is never called) , or to NULL if no flags were
1056 * - On failure, returns a positive errno value. If 'sfp' is nonnull, sets
1057 * '*sfp' to NULL. */
1059 netdev_turn_flags_on(struct netdev *netdev, enum netdev_flags flags,
1060 struct netdev_saved_flags **sfp)
1062 return do_update_flags(netdev, 0, flags, NULL, sfp);
1065 /* Turns off the specified 'flags' on 'netdev'. See netdev_turn_flags_on() for
1066 * details of the interface. */
1068 netdev_turn_flags_off(struct netdev *netdev, enum netdev_flags flags,
1069 struct netdev_saved_flags **sfp)
1071 return do_update_flags(netdev, flags, 0, NULL, sfp);
1074 /* Restores the flags that were saved in 'sf', and destroys 'sf'.
1075 * Does nothing if 'sf' is NULL. */
1077 netdev_restore_flags(struct netdev_saved_flags *sf)
1078 OVS_EXCLUDED(netdev_mutex)
1081 struct netdev *netdev = sf->netdev;
1082 enum netdev_flags old_flags;
1084 netdev->netdev_class->update_flags(netdev,
1085 sf->saved_flags & sf->saved_values,
1086 sf->saved_flags & ~sf->saved_values,
1089 ovs_mutex_lock(&netdev_mutex);
1090 list_remove(&sf->node);
1092 netdev_unref(netdev);
1096 /* Looks up the ARP table entry for 'ip' on 'netdev'. If one exists and can be
1097 * successfully retrieved, it stores the corresponding MAC address in 'mac' and
1098 * returns 0. Otherwise, it returns a positive errno value; in particular,
1099 * ENXIO indicates that there is no ARP table entry for 'ip' on 'netdev'. */
1101 netdev_arp_lookup(const struct netdev *netdev,
1102 ovs_be32 ip, uint8_t mac[ETH_ADDR_LEN])
1104 int error = (netdev->netdev_class->arp_lookup
1105 ? netdev->netdev_class->arp_lookup(netdev, ip, mac)
1108 memset(mac, 0, ETH_ADDR_LEN);
1113 /* Returns true if carrier is active (link light is on) on 'netdev'. */
1115 netdev_get_carrier(const struct netdev *netdev)
1118 enum netdev_flags flags;
1121 netdev_get_flags(netdev, &flags);
1122 if (!(flags & NETDEV_UP)) {
1126 if (!netdev->netdev_class->get_carrier) {
1130 error = netdev->netdev_class->get_carrier(netdev, &carrier);
1132 VLOG_DBG("%s: failed to get network device carrier status, assuming "
1133 "down: %s", netdev_get_name(netdev), ovs_strerror(error));
1140 /* Returns the number of times 'netdev''s carrier has changed. */
1142 netdev_get_carrier_resets(const struct netdev *netdev)
1144 return (netdev->netdev_class->get_carrier_resets
1145 ? netdev->netdev_class->get_carrier_resets(netdev)
1149 /* Attempts to force netdev_get_carrier() to poll 'netdev''s MII registers for
1150 * link status instead of checking 'netdev''s carrier. 'netdev''s MII
1151 * registers will be polled once ever 'interval' milliseconds. If 'netdev'
1152 * does not support MII, another method may be used as a fallback. If
1153 * 'interval' is less than or equal to zero, reverts netdev_get_carrier() to
1154 * its normal behavior.
1156 * Returns 0 if successful, otherwise a positive errno value. */
1158 netdev_set_miimon_interval(struct netdev *netdev, long long int interval)
1160 return (netdev->netdev_class->set_miimon_interval
1161 ? netdev->netdev_class->set_miimon_interval(netdev, interval)
1165 /* Retrieves current device stats for 'netdev'. */
1167 netdev_get_stats(const struct netdev *netdev, struct netdev_stats *stats)
1171 COVERAGE_INC(netdev_get_stats);
1172 error = (netdev->netdev_class->get_stats
1173 ? netdev->netdev_class->get_stats(netdev, stats)
1176 memset(stats, 0xff, sizeof *stats);
1181 /* Attempts to change the stats for 'netdev' to those provided in 'stats'.
1182 * Returns 0 if successful, otherwise a positive errno value.
1184 * This will probably fail for most network devices. Some devices might only
1185 * allow setting their stats to 0. */
1187 netdev_set_stats(struct netdev *netdev, const struct netdev_stats *stats)
1189 return (netdev->netdev_class->set_stats
1190 ? netdev->netdev_class->set_stats(netdev, stats)
1194 /* Attempts to set input rate limiting (policing) policy, such that up to
1195 * 'kbits_rate' kbps of traffic is accepted, with a maximum accumulative burst
1196 * size of 'kbits' kb. */
1198 netdev_set_policing(struct netdev *netdev, uint32_t kbits_rate,
1199 uint32_t kbits_burst)
1201 return (netdev->netdev_class->set_policing
1202 ? netdev->netdev_class->set_policing(netdev,
1203 kbits_rate, kbits_burst)
1207 /* Adds to 'types' all of the forms of QoS supported by 'netdev', or leaves it
1208 * empty if 'netdev' does not support QoS. Any names added to 'types' should
1209 * be documented as valid for the "type" column in the "QoS" table in
1210 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1212 * Every network device supports disabling QoS with a type of "", but this type
1213 * will not be added to 'types'.
1215 * The caller must initialize 'types' (e.g. with sset_init()) before calling
1216 * this function. The caller is responsible for destroying 'types' (e.g. with
1217 * sset_destroy()) when it is no longer needed.
1219 * Returns 0 if successful, otherwise a positive errno value. */
1221 netdev_get_qos_types(const struct netdev *netdev, struct sset *types)
1223 const struct netdev_class *class = netdev->netdev_class;
1224 return (class->get_qos_types
1225 ? class->get_qos_types(netdev, types)
1229 /* Queries 'netdev' for its capabilities regarding the specified 'type' of QoS,
1230 * which should be "" or one of the types returned by netdev_get_qos_types()
1231 * for 'netdev'. Returns 0 if successful, otherwise a positive errno value.
1232 * On success, initializes 'caps' with the QoS capabilities; on failure, clears
1233 * 'caps' to all zeros. */
1235 netdev_get_qos_capabilities(const struct netdev *netdev, const char *type,
1236 struct netdev_qos_capabilities *caps)
1238 const struct netdev_class *class = netdev->netdev_class;
1241 int retval = (class->get_qos_capabilities
1242 ? class->get_qos_capabilities(netdev, type, caps)
1245 memset(caps, 0, sizeof *caps);
1249 /* Every netdev supports turning off QoS. */
1250 memset(caps, 0, sizeof *caps);
1255 /* Obtains the number of queues supported by 'netdev' for the specified 'type'
1256 * of QoS. Returns 0 if successful, otherwise a positive errno value. Stores
1257 * the number of queues (zero on failure) in '*n_queuesp'.
1259 * This is just a simple wrapper around netdev_get_qos_capabilities(). */
1261 netdev_get_n_queues(const struct netdev *netdev,
1262 const char *type, unsigned int *n_queuesp)
1264 struct netdev_qos_capabilities caps;
1267 retval = netdev_get_qos_capabilities(netdev, type, &caps);
1268 *n_queuesp = caps.n_queues;
1272 /* Queries 'netdev' about its currently configured form of QoS. If successful,
1273 * stores the name of the current form of QoS into '*typep', stores any details
1274 * of configuration as string key-value pairs in 'details', and returns 0. On
1275 * failure, sets '*typep' to NULL and returns a positive errno value.
1277 * A '*typep' of "" indicates that QoS is currently disabled on 'netdev'.
1279 * The caller must initialize 'details' as an empty smap (e.g. with
1280 * smap_init()) before calling this function. The caller must free 'details'
1281 * when it is no longer needed (e.g. with smap_destroy()).
1283 * The caller must not modify or free '*typep'.
1285 * '*typep' will be one of the types returned by netdev_get_qos_types() for
1286 * 'netdev'. The contents of 'details' should be documented as valid for
1287 * '*typep' in the "other_config" column in the "QoS" table in
1288 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)). */
1290 netdev_get_qos(const struct netdev *netdev,
1291 const char **typep, struct smap *details)
1293 const struct netdev_class *class = netdev->netdev_class;
1296 if (class->get_qos) {
1297 retval = class->get_qos(netdev, typep, details);
1300 smap_clear(details);
1304 /* 'netdev' doesn't support QoS, so report that QoS is disabled. */
1310 /* Attempts to reconfigure QoS on 'netdev', changing the form of QoS to 'type'
1311 * with details of configuration from 'details'. Returns 0 if successful,
1312 * otherwise a positive errno value. On error, the previous QoS configuration
1315 * When this function changes the type of QoS (not just 'details'), this also
1316 * resets all queue configuration for 'netdev' to their defaults (which depend
1317 * on the specific type of QoS). Otherwise, the queue configuration for
1318 * 'netdev' is unchanged.
1320 * 'type' should be "" (to disable QoS) or one of the types returned by
1321 * netdev_get_qos_types() for 'netdev'. The contents of 'details' should be
1322 * documented as valid for the given 'type' in the "other_config" column in the
1323 * "QoS" table in vswitchd/vswitch.xml (which is built as
1324 * ovs-vswitchd.conf.db(8)).
1326 * NULL may be specified for 'details' if there are no configuration
1329 netdev_set_qos(struct netdev *netdev,
1330 const char *type, const struct smap *details)
1332 const struct netdev_class *class = netdev->netdev_class;
1338 if (class->set_qos) {
1340 static const struct smap empty = SMAP_INITIALIZER(&empty);
1343 return class->set_qos(netdev, type, details);
1345 return *type ? EOPNOTSUPP : 0;
1349 /* Queries 'netdev' for information about the queue numbered 'queue_id'. If
1350 * successful, adds that information as string key-value pairs to 'details'.
1351 * Returns 0 if successful, otherwise a positive errno value.
1353 * 'queue_id' must be less than the number of queues supported by 'netdev' for
1354 * the current form of QoS (e.g. as returned by netdev_get_n_queues(netdev)).
1356 * The returned contents of 'details' should be documented as valid for the
1357 * given 'type' in the "other_config" column in the "Queue" table in
1358 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1360 * The caller must initialize 'details' (e.g. with smap_init()) before calling
1361 * this function. The caller must free 'details' when it is no longer needed
1362 * (e.g. with smap_destroy()). */
1364 netdev_get_queue(const struct netdev *netdev,
1365 unsigned int queue_id, struct smap *details)
1367 const struct netdev_class *class = netdev->netdev_class;
1370 retval = (class->get_queue
1371 ? class->get_queue(netdev, queue_id, details)
1374 smap_clear(details);
1379 /* Configures the queue numbered 'queue_id' on 'netdev' with the key-value
1380 * string pairs in 'details'. The contents of 'details' should be documented
1381 * as valid for the given 'type' in the "other_config" column in the "Queue"
1382 * table in vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1383 * Returns 0 if successful, otherwise a positive errno value. On failure, the
1384 * given queue's configuration should be unmodified.
1386 * 'queue_id' must be less than the number of queues supported by 'netdev' for
1387 * the current form of QoS (e.g. as returned by netdev_get_n_queues(netdev)).
1389 * This function does not modify 'details', and the caller retains ownership of
1392 netdev_set_queue(struct netdev *netdev,
1393 unsigned int queue_id, const struct smap *details)
1395 const struct netdev_class *class = netdev->netdev_class;
1396 return (class->set_queue
1397 ? class->set_queue(netdev, queue_id, details)
1401 /* Attempts to delete the queue numbered 'queue_id' from 'netdev'. Some kinds
1402 * of QoS may have a fixed set of queues, in which case attempts to delete them
1403 * will fail with EOPNOTSUPP.
1405 * Returns 0 if successful, otherwise a positive errno value. On failure, the
1406 * given queue will be unmodified.
1408 * 'queue_id' must be less than the number of queues supported by 'netdev' for
1409 * the current form of QoS (e.g. as returned by
1410 * netdev_get_n_queues(netdev)). */
1412 netdev_delete_queue(struct netdev *netdev, unsigned int queue_id)
1414 const struct netdev_class *class = netdev->netdev_class;
1415 return (class->delete_queue
1416 ? class->delete_queue(netdev, queue_id)
1420 /* Obtains statistics about 'queue_id' on 'netdev'. On success, returns 0 and
1421 * fills 'stats' with the queue's statistics; individual members of 'stats' may
1422 * be set to all-1-bits if the statistic is unavailable. On failure, returns a
1423 * positive errno value and fills 'stats' with values indicating unsupported
1426 netdev_get_queue_stats(const struct netdev *netdev, unsigned int queue_id,
1427 struct netdev_queue_stats *stats)
1429 const struct netdev_class *class = netdev->netdev_class;
1432 retval = (class->get_queue_stats
1433 ? class->get_queue_stats(netdev, queue_id, stats)
1436 stats->tx_bytes = UINT64_MAX;
1437 stats->tx_packets = UINT64_MAX;
1438 stats->tx_errors = UINT64_MAX;
1439 stats->created = LLONG_MIN;
1444 /* Initializes 'dump' to begin dumping the queues in a netdev.
1446 * This function provides no status indication. An error status for the entire
1447 * dump operation is provided when it is completed by calling
1448 * netdev_queue_dump_done().
1451 netdev_queue_dump_start(struct netdev_queue_dump *dump,
1452 const struct netdev *netdev)
1454 dump->netdev = netdev_ref(netdev);
1455 if (netdev->netdev_class->queue_dump_start) {
1456 dump->error = netdev->netdev_class->queue_dump_start(netdev,
1459 dump->error = EOPNOTSUPP;
1463 /* Attempts to retrieve another queue from 'dump', which must have been
1464 * initialized with netdev_queue_dump_start(). On success, stores a new queue
1465 * ID into '*queue_id', fills 'details' with configuration details for the
1466 * queue, and returns true. On failure, returns false.
1468 * Queues are not necessarily dumped in increasing order of queue ID (or any
1469 * other predictable order).
1471 * Failure might indicate an actual error or merely that the last queue has
1472 * been dumped. An error status for the entire dump operation is provided when
1473 * it is completed by calling netdev_queue_dump_done().
1475 * The returned contents of 'details' should be documented as valid for the
1476 * given 'type' in the "other_config" column in the "Queue" table in
1477 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1479 * The caller must initialize 'details' (e.g. with smap_init()) before calling
1480 * this function. This function will clear and replace its contents. The
1481 * caller must free 'details' when it is no longer needed (e.g. with
1482 * smap_destroy()). */
1484 netdev_queue_dump_next(struct netdev_queue_dump *dump,
1485 unsigned int *queue_id, struct smap *details)
1487 const struct netdev *netdev = dump->netdev;
1493 dump->error = netdev->netdev_class->queue_dump_next(netdev, dump->state,
1497 netdev->netdev_class->queue_dump_done(netdev, dump->state);
1503 /* Completes queue table dump operation 'dump', which must have been
1504 * initialized with netdev_queue_dump_start(). Returns 0 if the dump operation
1505 * was error-free, otherwise a positive errno value describing the problem. */
1507 netdev_queue_dump_done(struct netdev_queue_dump *dump)
1509 const struct netdev *netdev = dump->netdev;
1510 if (!dump->error && netdev->netdev_class->queue_dump_done) {
1511 dump->error = netdev->netdev_class->queue_dump_done(netdev,
1514 netdev_close(dump->netdev);
1515 return dump->error == EOF ? 0 : dump->error;
1518 /* Iterates over all of 'netdev''s queues, calling 'cb' with the queue's ID,
1519 * its statistics, and the 'aux' specified by the caller. The order of
1520 * iteration is unspecified, but (when successful) each queue is visited
1523 * Calling this function may be more efficient than calling
1524 * netdev_get_queue_stats() for every queue.
1526 * 'cb' must not modify or free the statistics passed in.
1528 * Returns 0 if successful, otherwise a positive errno value. On error, some
1529 * configured queues may not have been included in the iteration. */
1531 netdev_dump_queue_stats(const struct netdev *netdev,
1532 netdev_dump_queue_stats_cb *cb, void *aux)
1534 const struct netdev_class *class = netdev->netdev_class;
1535 return (class->dump_queue_stats
1536 ? class->dump_queue_stats(netdev, cb, aux)
1541 /* Returns the class type of 'netdev'.
1543 * The caller must not free the returned value. */
1545 netdev_get_type(const struct netdev *netdev)
1547 return netdev->netdev_class->type;
1550 /* Returns the class associated with 'netdev'. */
1551 const struct netdev_class *
1552 netdev_get_class(const struct netdev *netdev)
1554 return netdev->netdev_class;
1557 /* Returns the netdev with 'name' or NULL if there is none.
1559 * The caller must free the returned netdev with netdev_close(). */
1561 netdev_from_name(const char *name)
1562 OVS_EXCLUDED(netdev_mutex)
1564 struct netdev *netdev;
1566 ovs_mutex_lock(&netdev_mutex);
1567 netdev = shash_find_data(&netdev_shash, name);
1571 ovs_mutex_unlock(&netdev_mutex);
1576 /* Fills 'device_list' with devices that match 'netdev_class'.
1578 * The caller is responsible for initializing and destroying 'device_list' and
1579 * must close each device on the list. */
1581 netdev_get_devices(const struct netdev_class *netdev_class,
1582 struct shash *device_list)
1583 OVS_EXCLUDED(netdev_mutex)
1585 struct shash_node *node;
1587 ovs_mutex_lock(&netdev_mutex);
1588 SHASH_FOR_EACH (node, &netdev_shash) {
1589 struct netdev *dev = node->data;
1591 if (dev->netdev_class == netdev_class) {
1593 shash_add(device_list, node->name, node->data);
1596 ovs_mutex_unlock(&netdev_mutex);
1600 netdev_get_type_from_name(const char *name)
1602 struct netdev *dev = netdev_from_name(name);
1603 const char *type = dev ? netdev_get_type(dev) : NULL;
1609 netdev_rx_get_netdev(const struct netdev_rx *rx)
1611 ovs_assert(rx->netdev->ref_cnt > 0);
1616 netdev_rx_get_name(const struct netdev_rx *rx)
1618 return netdev_get_name(netdev_rx_get_netdev(rx));
1622 restore_all_flags(void *aux OVS_UNUSED)
1624 struct shash_node *node;
1626 SHASH_FOR_EACH (node, &netdev_shash) {
1627 struct netdev *netdev = node->data;
1628 const struct netdev_saved_flags *sf;
1629 enum netdev_flags saved_values;
1630 enum netdev_flags saved_flags;
1632 saved_values = saved_flags = 0;
1633 LIST_FOR_EACH (sf, node, &netdev->saved_flags_list) {
1634 saved_flags |= sf->saved_flags;
1635 saved_values &= ~sf->saved_flags;
1636 saved_values |= sf->saved_flags & sf->saved_values;
1639 enum netdev_flags old_flags;
1641 netdev->netdev_class->update_flags(netdev,
1642 saved_flags & saved_values,
1643 saved_flags & ~saved_values,