2 * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
22 #include <netinet/in.h>
29 #include "dp-packet.h"
30 #include "dynamic-string.h"
31 #include "fatal-signal.h"
34 #include "netdev-dpdk.h"
35 #include "netdev-provider.h"
36 #include "netdev-vport.h"
37 #include "openflow/openflow.h"
39 #include "poll-loop.h"
45 #include "openvswitch/vlog.h"
48 VLOG_DEFINE_THIS_MODULE(netdev);
50 COVERAGE_DEFINE(netdev_received);
51 COVERAGE_DEFINE(netdev_sent);
52 COVERAGE_DEFINE(netdev_add_router);
53 COVERAGE_DEFINE(netdev_get_stats);
55 struct netdev_saved_flags {
56 struct netdev *netdev;
57 struct ovs_list node; /* In struct netdev's saved_flags_list. */
58 enum netdev_flags saved_flags;
59 enum netdev_flags saved_values;
62 /* Protects 'netdev_shash' and the mutable members of struct netdev. */
63 static struct ovs_mutex netdev_mutex = OVS_MUTEX_INITIALIZER;
65 /* All created network devices. */
66 static struct shash netdev_shash OVS_GUARDED_BY(netdev_mutex)
67 = SHASH_INITIALIZER(&netdev_shash);
69 /* Protects 'netdev_classes' against insertions or deletions.
71 * This is a recursive mutex to allow recursive acquisition when calling into
72 * providers. For example, netdev_run() calls into provider 'run' functions,
73 * which might reasonably want to call one of the netdev functions that takes
74 * netdev_class_mutex. */
75 static struct ovs_mutex netdev_class_mutex OVS_ACQ_BEFORE(netdev_mutex);
77 /* Contains 'struct netdev_registered_class'es. */
78 static struct hmap netdev_classes OVS_GUARDED_BY(netdev_class_mutex)
79 = HMAP_INITIALIZER(&netdev_classes);
81 struct netdev_registered_class {
82 /* In 'netdev_classes', by class->type. */
83 struct hmap_node hmap_node OVS_GUARDED_BY(netdev_class_mutex);
84 const struct netdev_class *class OVS_GUARDED_BY(netdev_class_mutex);
85 /* Number of 'struct netdev's of this class. */
86 int ref_cnt OVS_GUARDED_BY(netdev_class_mutex);
89 /* This is set pretty low because we probably won't learn anything from the
90 * additional log messages. */
91 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
93 static void restore_all_flags(void *aux OVS_UNUSED);
94 void update_device_args(struct netdev *, const struct shash *args);
97 netdev_n_txq(const struct netdev *netdev)
103 netdev_n_rxq(const struct netdev *netdev)
105 return netdev->n_rxq;
109 netdev_is_pmd(const struct netdev *netdev)
111 return (!strcmp(netdev->netdev_class->type, "dpdk") ||
112 !strcmp(netdev->netdev_class->type, "dpdkr") ||
113 !strcmp(netdev->netdev_class->type, "dpdkvhost"));
117 netdev_class_mutex_initialize(void)
118 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
120 static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
122 if (ovsthread_once_start(&once)) {
123 ovs_mutex_init_recursive(&netdev_class_mutex);
124 ovsthread_once_done(&once);
129 netdev_initialize(void)
130 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
132 static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
134 if (ovsthread_once_start(&once)) {
135 netdev_class_mutex_initialize();
137 fatal_signal_add_hook(restore_all_flags, NULL, NULL, true);
138 netdev_vport_patch_register();
141 netdev_register_provider(&netdev_linux_class);
142 netdev_register_provider(&netdev_internal_class);
143 netdev_register_provider(&netdev_tap_class);
144 netdev_vport_tunnel_register();
146 #if defined(__FreeBSD__) || defined(__NetBSD__)
147 netdev_register_provider(&netdev_tap_class);
148 netdev_register_provider(&netdev_bsd_class);
151 netdev_register_provider(&netdev_windows_class);
152 netdev_register_provider(&netdev_internal_class);
153 netdev_vport_tunnel_register();
155 netdev_dpdk_register();
157 ovsthread_once_done(&once);
161 /* Performs periodic work needed by all the various kinds of netdevs.
163 * If your program opens any netdevs, it must call this function within its
167 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
169 struct netdev_registered_class *rc;
172 ovs_mutex_lock(&netdev_class_mutex);
173 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
174 if (rc->class->run) {
178 ovs_mutex_unlock(&netdev_class_mutex);
181 /* Arranges for poll_block() to wake up when netdev_run() needs to be called.
183 * If your program opens any netdevs, it must call this function within its
187 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
189 struct netdev_registered_class *rc;
191 ovs_mutex_lock(&netdev_class_mutex);
192 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
193 if (rc->class->wait) {
197 ovs_mutex_unlock(&netdev_class_mutex);
200 static struct netdev_registered_class *
201 netdev_lookup_class(const char *type)
202 OVS_REQ_RDLOCK(netdev_class_mutex)
204 struct netdev_registered_class *rc;
206 HMAP_FOR_EACH_WITH_HASH (rc, hmap_node, hash_string(type, 0),
208 if (!strcmp(type, rc->class->type)) {
215 /* Initializes and registers a new netdev provider. After successful
216 * registration, new netdevs of that type can be opened using netdev_open(). */
218 netdev_register_provider(const struct netdev_class *new_class)
219 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
223 netdev_class_mutex_initialize();
224 ovs_mutex_lock(&netdev_class_mutex);
225 if (netdev_lookup_class(new_class->type)) {
226 VLOG_WARN("attempted to register duplicate netdev provider: %s",
230 error = new_class->init ? new_class->init() : 0;
232 struct netdev_registered_class *rc;
234 rc = xmalloc(sizeof *rc);
235 hmap_insert(&netdev_classes, &rc->hmap_node,
236 hash_string(new_class->type, 0));
237 rc->class = new_class;
240 VLOG_ERR("failed to initialize %s network device class: %s",
241 new_class->type, ovs_strerror(error));
244 ovs_mutex_unlock(&netdev_class_mutex);
249 /* Unregisters a netdev provider. 'type' must have been previously
250 * registered and not currently be in use by any netdevs. After unregistration
251 * new netdevs of that type cannot be opened using netdev_open(). */
253 netdev_unregister_provider(const char *type)
254 OVS_EXCLUDED(netdev_class_mutex, netdev_mutex)
256 struct netdev_registered_class *rc;
259 ovs_mutex_lock(&netdev_class_mutex);
260 rc = netdev_lookup_class(type);
262 VLOG_WARN("attempted to unregister a netdev provider that is not "
263 "registered: %s", type);
264 error = EAFNOSUPPORT;
267 hmap_remove(&netdev_classes, &rc->hmap_node);
271 VLOG_WARN("attempted to unregister in use netdev provider: %s",
276 ovs_mutex_unlock(&netdev_class_mutex);
281 /* Clears 'types' and enumerates the types of all currently registered netdev
282 * providers into it. The caller must first initialize the sset. */
284 netdev_enumerate_types(struct sset *types)
285 OVS_EXCLUDED(netdev_mutex)
287 struct netdev_registered_class *rc;
292 ovs_mutex_lock(&netdev_class_mutex);
293 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
294 sset_add(types, rc->class->type);
296 ovs_mutex_unlock(&netdev_class_mutex);
299 /* Check that the network device name is not the same as any of the registered
300 * vport providers' dpif_port name (dpif_port is NULL if the vport provider
301 * does not define it) or the datapath internal port name (e.g. ovs-system).
303 * Returns true if there is a name conflict, false otherwise. */
305 netdev_is_reserved_name(const char *name)
306 OVS_EXCLUDED(netdev_mutex)
308 struct netdev_registered_class *rc;
312 ovs_mutex_lock(&netdev_class_mutex);
313 HMAP_FOR_EACH (rc, hmap_node, &netdev_classes) {
314 const char *dpif_port = netdev_vport_class_get_dpif_port(rc->class);
315 if (dpif_port && !strncmp(name, dpif_port, strlen(dpif_port))) {
316 ovs_mutex_unlock(&netdev_class_mutex);
320 ovs_mutex_unlock(&netdev_class_mutex);
322 if (!strncmp(name, "ovs-", 4)) {
327 dp_enumerate_types(&types);
328 SSET_FOR_EACH (type, &types) {
329 if (!strcmp(name+4, type)) {
330 sset_destroy(&types);
334 sset_destroy(&types);
340 /* Opens the network device named 'name' (e.g. "eth0") of the specified 'type'
341 * (e.g. "system") and returns zero if successful, otherwise a positive errno
342 * value. On success, sets '*netdevp' to the new network device, otherwise to
345 * Some network devices may need to be configured (with netdev_set_config())
346 * before they can be used. */
348 netdev_open(const char *name, const char *type, struct netdev **netdevp)
349 OVS_EXCLUDED(netdev_mutex)
351 struct netdev *netdev;
356 ovs_mutex_lock(&netdev_class_mutex);
357 ovs_mutex_lock(&netdev_mutex);
358 netdev = shash_find_data(&netdev_shash, name);
360 struct netdev_registered_class *rc;
362 rc = netdev_lookup_class(type && type[0] ? type : "system");
364 netdev = rc->class->alloc();
366 memset(netdev, 0, sizeof *netdev);
367 netdev->netdev_class = rc->class;
368 netdev->name = xstrdup(name);
369 netdev->change_seq = 1;
370 netdev->node = shash_add(&netdev_shash, name, netdev);
372 /* By default enable one tx and rx queue per netdev. */
373 netdev->n_txq = netdev->netdev_class->send ? 1 : 0;
374 netdev->n_rxq = netdev->netdev_class->rxq_alloc ? 1 : 0;
376 list_init(&netdev->saved_flags_list);
378 error = rc->class->construct(netdev);
381 netdev_change_seq_changed(netdev);
384 ovs_assert(list_is_empty(&netdev->saved_flags_list));
385 shash_delete(&netdev_shash, netdev->node);
386 rc->class->dealloc(netdev);
392 VLOG_WARN("could not create netdev %s of unknown type %s",
394 error = EAFNOSUPPORT;
406 ovs_mutex_unlock(&netdev_mutex);
407 ovs_mutex_unlock(&netdev_class_mutex);
412 /* Returns a reference to 'netdev_' for the caller to own. Returns null if
413 * 'netdev_' is null. */
415 netdev_ref(const struct netdev *netdev_)
416 OVS_EXCLUDED(netdev_mutex)
418 struct netdev *netdev = CONST_CAST(struct netdev *, netdev_);
421 ovs_mutex_lock(&netdev_mutex);
422 ovs_assert(netdev->ref_cnt > 0);
424 ovs_mutex_unlock(&netdev_mutex);
429 /* Reconfigures the device 'netdev' with 'args'. 'args' may be empty
430 * or NULL if none are needed. */
432 netdev_set_config(struct netdev *netdev, const struct smap *args, char **errp)
433 OVS_EXCLUDED(netdev_mutex)
435 if (netdev->netdev_class->set_config) {
436 const struct smap no_args = SMAP_INITIALIZER(&no_args);
439 error = netdev->netdev_class->set_config(netdev,
440 args ? args : &no_args);
442 VLOG_WARN_BUF(errp, "%s: could not set configuration (%s)",
443 netdev_get_name(netdev), ovs_strerror(error));
446 } else if (args && !smap_is_empty(args)) {
447 VLOG_WARN_BUF(errp, "%s: arguments provided to device that is not configurable",
448 netdev_get_name(netdev));
453 /* Returns the current configuration for 'netdev' in 'args'. The caller must
454 * have already initialized 'args' with smap_init(). Returns 0 on success, in
455 * which case 'args' will be filled with 'netdev''s configuration. On failure
456 * returns a positive errno value, in which case 'args' will be empty.
458 * The caller owns 'args' and its contents and must eventually free them with
461 netdev_get_config(const struct netdev *netdev, struct smap *args)
462 OVS_EXCLUDED(netdev_mutex)
467 if (netdev->netdev_class->get_config) {
468 error = netdev->netdev_class->get_config(netdev, args);
479 const struct netdev_tunnel_config *
480 netdev_get_tunnel_config(const struct netdev *netdev)
481 OVS_EXCLUDED(netdev_mutex)
483 if (netdev->netdev_class->get_tunnel_config) {
484 return netdev->netdev_class->get_tunnel_config(netdev);
490 /* Returns the id of the numa node the 'netdev' is on. If the function
491 * is not implemented, returns NETDEV_NUMA_UNSPEC. */
493 netdev_get_numa_id(const struct netdev *netdev)
495 if (netdev->netdev_class->get_numa_id) {
496 return netdev->netdev_class->get_numa_id(netdev);
498 return NETDEV_NUMA_UNSPEC;
503 netdev_unref(struct netdev *dev)
504 OVS_RELEASES(netdev_mutex)
506 ovs_assert(dev->ref_cnt);
507 if (!--dev->ref_cnt) {
508 const struct netdev_class *class = dev->netdev_class;
509 struct netdev_registered_class *rc;
511 dev->netdev_class->destruct(dev);
514 shash_delete(&netdev_shash, dev->node);
517 dev->netdev_class->dealloc(dev);
518 ovs_mutex_unlock(&netdev_mutex);
520 ovs_mutex_lock(&netdev_class_mutex);
521 rc = netdev_lookup_class(class->type);
522 ovs_assert(rc->ref_cnt > 0);
524 ovs_mutex_unlock(&netdev_class_mutex);
526 ovs_mutex_unlock(&netdev_mutex);
530 /* Closes and destroys 'netdev'. */
532 netdev_close(struct netdev *netdev)
533 OVS_EXCLUDED(netdev_mutex)
536 ovs_mutex_lock(&netdev_mutex);
537 netdev_unref(netdev);
541 /* Removes 'netdev' from the global shash and unrefs 'netdev'.
543 * This allows handler and revalidator threads to still retain references
544 * to this netdev while the main thread changes interface configuration.
546 * This function should only be called by the main thread when closing
547 * netdevs during user configuration changes. Otherwise, netdev_close should be
548 * used to close netdevs. */
550 netdev_remove(struct netdev *netdev)
553 ovs_mutex_lock(&netdev_mutex);
555 shash_delete(&netdev_shash, netdev->node);
557 netdev_change_seq_changed(netdev);
559 netdev_unref(netdev);
563 /* Parses 'netdev_name_', which is of the form [type@]name into its component
564 * pieces. 'name' and 'type' must be freed by the caller. */
566 netdev_parse_name(const char *netdev_name_, char **name, char **type)
568 char *netdev_name = xstrdup(netdev_name_);
571 separator = strchr(netdev_name, '@');
575 *name = xstrdup(separator + 1);
578 *type = xstrdup("system");
582 /* Attempts to open a netdev_rxq handle for obtaining packets received on
583 * 'netdev'. On success, returns 0 and stores a nonnull 'netdev_rxq *' into
584 * '*rxp'. On failure, returns a positive errno value and stores NULL into
587 * Some kinds of network devices might not support receiving packets. This
588 * function returns EOPNOTSUPP in that case.*/
590 netdev_rxq_open(struct netdev *netdev, struct netdev_rxq **rxp, int id)
591 OVS_EXCLUDED(netdev_mutex)
595 if (netdev->netdev_class->rxq_alloc && id < netdev->n_rxq) {
596 struct netdev_rxq *rx = netdev->netdev_class->rxq_alloc();
600 error = netdev->netdev_class->rxq_construct(rx);
606 netdev->netdev_class->rxq_dealloc(rx);
620 netdev_rxq_close(struct netdev_rxq *rx)
621 OVS_EXCLUDED(netdev_mutex)
624 struct netdev *netdev = rx->netdev;
625 netdev->netdev_class->rxq_destruct(rx);
626 netdev->netdev_class->rxq_dealloc(rx);
627 netdev_close(netdev);
631 /* Attempts to receive batch of packets from 'rx'.
633 * Returns EAGAIN immediately if no packet is ready to be received.
635 * Returns EMSGSIZE, and discards the packet, if the received packet is longer
636 * than 'dp_packet_tailroom(buffer)'.
638 * It is advised that the tailroom of 'buffer' should be
639 * VLAN_HEADER_LEN bytes longer than the MTU to allow space for an
640 * out-of-band VLAN header to be added to the packet. At the very least,
641 * 'buffer' must have at least ETH_TOTAL_MIN bytes of tailroom.
643 * This function may be set to null if it would always return EOPNOTSUPP
646 netdev_rxq_recv(struct netdev_rxq *rx, struct dp_packet **buffers, int *cnt)
650 retval = rx->netdev->netdev_class->rxq_recv(rx, buffers, cnt);
652 COVERAGE_INC(netdev_received);
657 /* Arranges for poll_block() to wake up when a packet is ready to be received
660 netdev_rxq_wait(struct netdev_rxq *rx)
662 rx->netdev->netdev_class->rxq_wait(rx);
665 /* Discards any packets ready to be received on 'rx'. */
667 netdev_rxq_drain(struct netdev_rxq *rx)
669 return (rx->netdev->netdev_class->rxq_drain
670 ? rx->netdev->netdev_class->rxq_drain(rx)
674 /* Configures the number of tx queues and rx queues of 'netdev'.
675 * Return 0 if successful, otherwise a positive errno value.
677 * On error, the tx queue and rx queue configuration is indeterminant.
678 * Caller should make decision on whether to restore the previous or
679 * the default configuration. Also, caller must make sure there is no
680 * other thread accessing the queues at the same time. */
682 netdev_set_multiq(struct netdev *netdev, unsigned int n_txq,
687 error = (netdev->netdev_class->set_multiq
688 ? netdev->netdev_class->set_multiq(netdev,
693 if (error && error != EOPNOTSUPP) {
694 VLOG_DBG_RL(&rl, "failed to set tx/rx queue for network device %s:"
695 "%s", netdev_get_name(netdev), ovs_strerror(error));
701 /* Sends 'buffers' on 'netdev'. Returns 0 if successful (for every packet),
702 * otherwise a positive errno value. Returns EAGAIN without blocking if
703 * at least one the packets cannot be queued immediately. Returns EMSGSIZE
704 * if a partial packet was transmitted or if a packet is too big or too small
705 * to transmit on the device.
707 * If the function returns a non-zero value, some of the packets might have
710 * To retain ownership of 'buffer' caller can set may_steal to false.
712 * The network device is expected to maintain one or more packet
713 * transmission queues, so that the caller does not ordinarily have to
714 * do additional queuing of packets. 'qid' specifies the queue to use
715 * and can be ignored if the implementation does not support multiple
718 * Some network devices may not implement support for this function. In such
719 * cases this function will always return EOPNOTSUPP. */
721 netdev_send(struct netdev *netdev, int qid, struct dp_packet **buffers,
722 int cnt, bool may_steal)
726 error = (netdev->netdev_class->send
727 ? netdev->netdev_class->send(netdev, qid, buffers, cnt, may_steal)
730 COVERAGE_INC(netdev_sent);
736 netdev_pop_header(struct netdev *netdev, struct dp_packet **buffers, int cnt)
738 return (netdev->netdev_class->pop_header
739 ? netdev->netdev_class->pop_header(netdev, buffers, cnt)
744 netdev_build_header(const struct netdev *netdev, struct ovs_action_push_tnl *data,
745 const struct flow *tnl_flow)
747 if (netdev->netdev_class->build_header) {
748 return netdev->netdev_class->build_header(netdev, data, tnl_flow);
754 netdev_push_header(const struct netdev *netdev,
755 struct dp_packet **buffers, int cnt,
756 const struct ovs_action_push_tnl *data)
758 if (netdev->netdev_class->push_header) {
759 return netdev->netdev_class->push_header(netdev, buffers, cnt, data);
765 /* Registers with the poll loop to wake up from the next call to poll_block()
766 * when the packet transmission queue has sufficient room to transmit a packet
767 * with netdev_send().
769 * The network device is expected to maintain one or more packet
770 * transmission queues, so that the caller does not ordinarily have to
771 * do additional queuing of packets. 'qid' specifies the queue to use
772 * and can be ignored if the implementation does not support multiple
775 netdev_send_wait(struct netdev *netdev, int qid)
777 if (netdev->netdev_class->send_wait) {
778 netdev->netdev_class->send_wait(netdev, qid);
782 /* Attempts to set 'netdev''s MAC address to 'mac'. Returns 0 if successful,
783 * otherwise a positive errno value. */
785 netdev_set_etheraddr(struct netdev *netdev, const uint8_t mac[ETH_ADDR_LEN])
787 return netdev->netdev_class->set_etheraddr(netdev, mac);
790 /* Retrieves 'netdev''s MAC address. If successful, returns 0 and copies the
791 * the MAC address into 'mac'. On failure, returns a positive errno value and
792 * clears 'mac' to all-zeros. */
794 netdev_get_etheraddr(const struct netdev *netdev, uint8_t mac[ETH_ADDR_LEN])
796 return netdev->netdev_class->get_etheraddr(netdev, mac);
799 /* Returns the name of the network device that 'netdev' represents,
800 * e.g. "eth0". The caller must not modify or free the returned string. */
802 netdev_get_name(const struct netdev *netdev)
807 /* Retrieves the MTU of 'netdev'. The MTU is the maximum size of transmitted
808 * (and received) packets, in bytes, not including the hardware header; thus,
809 * this is typically 1500 bytes for Ethernet devices.
811 * If successful, returns 0 and stores the MTU size in '*mtup'. Returns
812 * EOPNOTSUPP if 'netdev' does not have an MTU (as e.g. some tunnels do not).
813 * On other failure, returns a positive errno value. On failure, sets '*mtup'
816 netdev_get_mtu(const struct netdev *netdev, int *mtup)
818 const struct netdev_class *class = netdev->netdev_class;
821 error = class->get_mtu ? class->get_mtu(netdev, mtup) : EOPNOTSUPP;
824 if (error != EOPNOTSUPP) {
825 VLOG_DBG_RL(&rl, "failed to retrieve MTU for network device %s: "
826 "%s", netdev_get_name(netdev), ovs_strerror(error));
832 /* Sets the MTU of 'netdev'. The MTU is the maximum size of transmitted
833 * (and received) packets, in bytes.
835 * If successful, returns 0. Returns EOPNOTSUPP if 'netdev' does not have an
836 * MTU (as e.g. some tunnels do not). On other failure, returns a positive
839 netdev_set_mtu(const struct netdev *netdev, int mtu)
841 const struct netdev_class *class = netdev->netdev_class;
844 error = class->set_mtu ? class->set_mtu(netdev, mtu) : EOPNOTSUPP;
845 if (error && error != EOPNOTSUPP) {
846 VLOG_DBG_RL(&rl, "failed to set MTU for network device %s: %s",
847 netdev_get_name(netdev), ovs_strerror(error));
853 /* Returns the ifindex of 'netdev', if successful, as a positive number. On
854 * failure, returns a negative errno value.
856 * The desired semantics of the ifindex value are a combination of those
857 * specified by POSIX for if_nametoindex() and by SNMP for ifIndex. An ifindex
858 * value should be unique within a host and remain stable at least until
859 * reboot. SNMP says an ifindex "ranges between 1 and the value of ifNumber"
860 * but many systems do not follow this rule anyhow.
862 * Some network devices may not implement support for this function. In such
863 * cases this function will always return -EOPNOTSUPP.
866 netdev_get_ifindex(const struct netdev *netdev)
868 int (*get_ifindex)(const struct netdev *);
870 get_ifindex = netdev->netdev_class->get_ifindex;
872 return get_ifindex ? get_ifindex(netdev) : -EOPNOTSUPP;
875 /* Stores the features supported by 'netdev' into each of '*current',
876 * '*advertised', '*supported', and '*peer' that are non-null. Each value is a
877 * bitmap of "enum ofp_port_features" bits, in host byte order. Returns 0 if
878 * successful, otherwise a positive errno value. On failure, all of the
879 * passed-in values are set to 0.
881 * Some network devices may not implement support for this function. In such
882 * cases this function will always return EOPNOTSUPP. */
884 netdev_get_features(const struct netdev *netdev,
885 enum netdev_features *current,
886 enum netdev_features *advertised,
887 enum netdev_features *supported,
888 enum netdev_features *peer)
890 int (*get_features)(const struct netdev *netdev,
891 enum netdev_features *current,
892 enum netdev_features *advertised,
893 enum netdev_features *supported,
894 enum netdev_features *peer);
895 enum netdev_features dummy[4];
902 advertised = &dummy[1];
905 supported = &dummy[2];
911 get_features = netdev->netdev_class->get_features;
913 ? get_features(netdev, current, advertised, supported,
917 *current = *advertised = *supported = *peer = 0;
922 /* Returns the maximum speed of a network connection that has the NETDEV_F_*
923 * bits in 'features', in bits per second. If no bits that indicate a speed
924 * are set in 'features', returns 'default_bps'. */
926 netdev_features_to_bps(enum netdev_features features,
927 uint64_t default_bps)
930 F_1000000MB = NETDEV_F_1TB_FD,
931 F_100000MB = NETDEV_F_100GB_FD,
932 F_40000MB = NETDEV_F_40GB_FD,
933 F_10000MB = NETDEV_F_10GB_FD,
934 F_1000MB = NETDEV_F_1GB_HD | NETDEV_F_1GB_FD,
935 F_100MB = NETDEV_F_100MB_HD | NETDEV_F_100MB_FD,
936 F_10MB = NETDEV_F_10MB_HD | NETDEV_F_10MB_FD
939 return ( features & F_1000000MB ? UINT64_C(1000000000000)
940 : features & F_100000MB ? UINT64_C(100000000000)
941 : features & F_40000MB ? UINT64_C(40000000000)
942 : features & F_10000MB ? UINT64_C(10000000000)
943 : features & F_1000MB ? UINT64_C(1000000000)
944 : features & F_100MB ? UINT64_C(100000000)
945 : features & F_10MB ? UINT64_C(10000000)
949 /* Returns true if any of the NETDEV_F_* bits that indicate a full-duplex link
950 * are set in 'features', otherwise false. */
952 netdev_features_is_full_duplex(enum netdev_features features)
954 return (features & (NETDEV_F_10MB_FD | NETDEV_F_100MB_FD | NETDEV_F_1GB_FD
955 | NETDEV_F_10GB_FD | NETDEV_F_40GB_FD
956 | NETDEV_F_100GB_FD | NETDEV_F_1TB_FD)) != 0;
959 /* Set the features advertised by 'netdev' to 'advertise'. Returns 0 if
960 * successful, otherwise a positive errno value. */
962 netdev_set_advertisements(struct netdev *netdev,
963 enum netdev_features advertise)
965 return (netdev->netdev_class->set_advertisements
966 ? netdev->netdev_class->set_advertisements(
971 /* If 'netdev' has an assigned IPv4 address, sets '*address' to that address
972 * and '*netmask' to its netmask and returns 0. Otherwise, returns a positive
973 * errno value and sets '*address' to 0 (INADDR_ANY).
975 * The following error values have well-defined meanings:
977 * - EADDRNOTAVAIL: 'netdev' has no assigned IPv4 address.
979 * - EOPNOTSUPP: No IPv4 network stack attached to 'netdev'.
981 * 'address' or 'netmask' or both may be null, in which case the address or
982 * netmask is not reported. */
984 netdev_get_in4(const struct netdev *netdev,
985 struct in_addr *address_, struct in_addr *netmask_)
987 struct in_addr address;
988 struct in_addr netmask;
991 error = (netdev->netdev_class->get_in4
992 ? netdev->netdev_class->get_in4(netdev,
996 address_->s_addr = error ? 0 : address.s_addr;
999 netmask_->s_addr = error ? 0 : netmask.s_addr;
1004 /* Assigns 'addr' as 'netdev''s IPv4 address and 'mask' as its netmask. If
1005 * 'addr' is INADDR_ANY, 'netdev''s IPv4 address is cleared. Returns a
1006 * positive errno value. */
1008 netdev_set_in4(struct netdev *netdev, struct in_addr addr, struct in_addr mask)
1010 return (netdev->netdev_class->set_in4
1011 ? netdev->netdev_class->set_in4(netdev, addr, mask)
1015 /* Obtains ad IPv4 address from device name and save the address in
1016 * in4. Returns 0 if successful, otherwise a positive errno value.
1019 netdev_get_in4_by_name(const char *device_name, struct in_addr *in4)
1021 struct netdev *netdev;
1024 error = netdev_open(device_name, "system", &netdev);
1026 in4->s_addr = htonl(0);
1030 error = netdev_get_in4(netdev, in4, NULL);
1031 netdev_close(netdev);
1035 /* Adds 'router' as a default IP gateway for the TCP/IP stack that corresponds
1038 netdev_add_router(struct netdev *netdev, struct in_addr router)
1040 COVERAGE_INC(netdev_add_router);
1041 return (netdev->netdev_class->add_router
1042 ? netdev->netdev_class->add_router(netdev, router)
1046 /* Looks up the next hop for 'host' for the TCP/IP stack that corresponds to
1047 * 'netdev'. If a route cannot not be determined, sets '*next_hop' to 0,
1048 * '*netdev_name' to null, and returns a positive errno value. Otherwise, if a
1049 * next hop is found, stores the next hop gateway's address (0 if 'host' is on
1050 * a directly connected network) in '*next_hop' and a copy of the name of the
1051 * device to reach 'host' in '*netdev_name', and returns 0. The caller is
1052 * responsible for freeing '*netdev_name' (by calling free()). */
1054 netdev_get_next_hop(const struct netdev *netdev,
1055 const struct in_addr *host, struct in_addr *next_hop,
1058 int error = (netdev->netdev_class->get_next_hop
1059 ? netdev->netdev_class->get_next_hop(
1060 host, next_hop, netdev_name)
1063 next_hop->s_addr = 0;
1064 *netdev_name = NULL;
1069 /* Populates 'smap' with status information.
1071 * Populates 'smap' with 'netdev' specific status information. This
1072 * information may be used to populate the status column of the Interface table
1073 * as defined in ovs-vswitchd.conf.db(5). */
1075 netdev_get_status(const struct netdev *netdev, struct smap *smap)
1077 return (netdev->netdev_class->get_status
1078 ? netdev->netdev_class->get_status(netdev, smap)
1082 /* If 'netdev' has an assigned IPv6 address, sets '*in6' to that address and
1083 * returns 0. Otherwise, returns a positive errno value and sets '*in6' to
1084 * all-zero-bits (in6addr_any).
1086 * The following error values have well-defined meanings:
1088 * - EADDRNOTAVAIL: 'netdev' has no assigned IPv6 address.
1090 * - EOPNOTSUPP: No IPv6 network stack attached to 'netdev'.
1092 * 'in6' may be null, in which case the address itself is not reported. */
1094 netdev_get_in6(const struct netdev *netdev, struct in6_addr *in6)
1096 struct in6_addr dummy;
1099 error = (netdev->netdev_class->get_in6
1100 ? netdev->netdev_class->get_in6(netdev,
1104 memset(in6, 0, sizeof *in6);
1109 /* On 'netdev', turns off the flags in 'off' and then turns on the flags in
1110 * 'on'. Returns 0 if successful, otherwise a positive errno value. */
1112 do_update_flags(struct netdev *netdev, enum netdev_flags off,
1113 enum netdev_flags on, enum netdev_flags *old_flagsp,
1114 struct netdev_saved_flags **sfp)
1115 OVS_EXCLUDED(netdev_mutex)
1117 struct netdev_saved_flags *sf = NULL;
1118 enum netdev_flags old_flags;
1121 error = netdev->netdev_class->update_flags(netdev, off & ~on, on,
1124 VLOG_WARN_RL(&rl, "failed to %s flags for network device %s: %s",
1125 off || on ? "set" : "get", netdev_get_name(netdev),
1126 ovs_strerror(error));
1128 } else if ((off || on) && sfp) {
1129 enum netdev_flags new_flags = (old_flags & ~off) | on;
1130 enum netdev_flags changed_flags = old_flags ^ new_flags;
1131 if (changed_flags) {
1132 ovs_mutex_lock(&netdev_mutex);
1133 *sfp = sf = xmalloc(sizeof *sf);
1134 sf->netdev = netdev;
1135 list_push_front(&netdev->saved_flags_list, &sf->node);
1136 sf->saved_flags = changed_flags;
1137 sf->saved_values = changed_flags & new_flags;
1140 ovs_mutex_unlock(&netdev_mutex);
1145 *old_flagsp = old_flags;
1154 /* Obtains the current flags for 'netdev' and stores them into '*flagsp'.
1155 * Returns 0 if successful, otherwise a positive errno value. On failure,
1156 * stores 0 into '*flagsp'. */
1158 netdev_get_flags(const struct netdev *netdev_, enum netdev_flags *flagsp)
1160 struct netdev *netdev = CONST_CAST(struct netdev *, netdev_);
1161 return do_update_flags(netdev, 0, 0, flagsp, NULL);
1164 /* Sets the flags for 'netdev' to 'flags'.
1165 * Returns 0 if successful, otherwise a positive errno value. */
1167 netdev_set_flags(struct netdev *netdev, enum netdev_flags flags,
1168 struct netdev_saved_flags **sfp)
1170 return do_update_flags(netdev, -1, flags, NULL, sfp);
1173 /* Turns on the specified 'flags' on 'netdev':
1175 * - On success, returns 0. If 'sfp' is nonnull, sets '*sfp' to a newly
1176 * allocated 'struct netdev_saved_flags *' that may be passed to
1177 * netdev_restore_flags() to restore the original values of 'flags' on
1178 * 'netdev' (this will happen automatically at program termination if
1179 * netdev_restore_flags() is never called) , or to NULL if no flags were
1182 * - On failure, returns a positive errno value. If 'sfp' is nonnull, sets
1183 * '*sfp' to NULL. */
1185 netdev_turn_flags_on(struct netdev *netdev, enum netdev_flags flags,
1186 struct netdev_saved_flags **sfp)
1188 return do_update_flags(netdev, 0, flags, NULL, sfp);
1191 /* Turns off the specified 'flags' on 'netdev'. See netdev_turn_flags_on() for
1192 * details of the interface. */
1194 netdev_turn_flags_off(struct netdev *netdev, enum netdev_flags flags,
1195 struct netdev_saved_flags **sfp)
1197 return do_update_flags(netdev, flags, 0, NULL, sfp);
1200 /* Restores the flags that were saved in 'sf', and destroys 'sf'.
1201 * Does nothing if 'sf' is NULL. */
1203 netdev_restore_flags(struct netdev_saved_flags *sf)
1204 OVS_EXCLUDED(netdev_mutex)
1207 struct netdev *netdev = sf->netdev;
1208 enum netdev_flags old_flags;
1210 netdev->netdev_class->update_flags(netdev,
1211 sf->saved_flags & sf->saved_values,
1212 sf->saved_flags & ~sf->saved_values,
1215 ovs_mutex_lock(&netdev_mutex);
1216 list_remove(&sf->node);
1218 netdev_unref(netdev);
1222 /* Looks up the ARP table entry for 'ip' on 'netdev'. If one exists and can be
1223 * successfully retrieved, it stores the corresponding MAC address in 'mac' and
1224 * returns 0. Otherwise, it returns a positive errno value; in particular,
1225 * ENXIO indicates that there is no ARP table entry for 'ip' on 'netdev'. */
1227 netdev_arp_lookup(const struct netdev *netdev,
1228 ovs_be32 ip, uint8_t mac[ETH_ADDR_LEN])
1230 int error = (netdev->netdev_class->arp_lookup
1231 ? netdev->netdev_class->arp_lookup(netdev, ip, mac)
1234 memset(mac, 0, ETH_ADDR_LEN);
1239 /* Returns true if carrier is active (link light is on) on 'netdev'. */
1241 netdev_get_carrier(const struct netdev *netdev)
1244 enum netdev_flags flags;
1247 netdev_get_flags(netdev, &flags);
1248 if (!(flags & NETDEV_UP)) {
1252 if (!netdev->netdev_class->get_carrier) {
1256 error = netdev->netdev_class->get_carrier(netdev, &carrier);
1258 VLOG_DBG("%s: failed to get network device carrier status, assuming "
1259 "down: %s", netdev_get_name(netdev), ovs_strerror(error));
1266 /* Returns the number of times 'netdev''s carrier has changed. */
1268 netdev_get_carrier_resets(const struct netdev *netdev)
1270 return (netdev->netdev_class->get_carrier_resets
1271 ? netdev->netdev_class->get_carrier_resets(netdev)
1275 /* Attempts to force netdev_get_carrier() to poll 'netdev''s MII registers for
1276 * link status instead of checking 'netdev''s carrier. 'netdev''s MII
1277 * registers will be polled once ever 'interval' milliseconds. If 'netdev'
1278 * does not support MII, another method may be used as a fallback. If
1279 * 'interval' is less than or equal to zero, reverts netdev_get_carrier() to
1280 * its normal behavior.
1282 * Returns 0 if successful, otherwise a positive errno value. */
1284 netdev_set_miimon_interval(struct netdev *netdev, long long int interval)
1286 return (netdev->netdev_class->set_miimon_interval
1287 ? netdev->netdev_class->set_miimon_interval(netdev, interval)
1291 /* Retrieves current device stats for 'netdev'. */
1293 netdev_get_stats(const struct netdev *netdev, struct netdev_stats *stats)
1297 COVERAGE_INC(netdev_get_stats);
1298 error = (netdev->netdev_class->get_stats
1299 ? netdev->netdev_class->get_stats(netdev, stats)
1302 memset(stats, 0xff, sizeof *stats);
1307 /* Attempts to set input rate limiting (policing) policy, such that up to
1308 * 'kbits_rate' kbps of traffic is accepted, with a maximum accumulative burst
1309 * size of 'kbits' kb. */
1311 netdev_set_policing(struct netdev *netdev, uint32_t kbits_rate,
1312 uint32_t kbits_burst)
1314 return (netdev->netdev_class->set_policing
1315 ? netdev->netdev_class->set_policing(netdev,
1316 kbits_rate, kbits_burst)
1320 /* Adds to 'types' all of the forms of QoS supported by 'netdev', or leaves it
1321 * empty if 'netdev' does not support QoS. Any names added to 'types' should
1322 * be documented as valid for the "type" column in the "QoS" table in
1323 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1325 * Every network device supports disabling QoS with a type of "", but this type
1326 * will not be added to 'types'.
1328 * The caller must initialize 'types' (e.g. with sset_init()) before calling
1329 * this function. The caller is responsible for destroying 'types' (e.g. with
1330 * sset_destroy()) when it is no longer needed.
1332 * Returns 0 if successful, otherwise a positive errno value. */
1334 netdev_get_qos_types(const struct netdev *netdev, struct sset *types)
1336 const struct netdev_class *class = netdev->netdev_class;
1337 return (class->get_qos_types
1338 ? class->get_qos_types(netdev, types)
1342 /* Queries 'netdev' for its capabilities regarding the specified 'type' of QoS,
1343 * which should be "" or one of the types returned by netdev_get_qos_types()
1344 * for 'netdev'. Returns 0 if successful, otherwise a positive errno value.
1345 * On success, initializes 'caps' with the QoS capabilities; on failure, clears
1346 * 'caps' to all zeros. */
1348 netdev_get_qos_capabilities(const struct netdev *netdev, const char *type,
1349 struct netdev_qos_capabilities *caps)
1351 const struct netdev_class *class = netdev->netdev_class;
1354 int retval = (class->get_qos_capabilities
1355 ? class->get_qos_capabilities(netdev, type, caps)
1358 memset(caps, 0, sizeof *caps);
1362 /* Every netdev supports turning off QoS. */
1363 memset(caps, 0, sizeof *caps);
1368 /* Obtains the number of queues supported by 'netdev' for the specified 'type'
1369 * of QoS. Returns 0 if successful, otherwise a positive errno value. Stores
1370 * the number of queues (zero on failure) in '*n_queuesp'.
1372 * This is just a simple wrapper around netdev_get_qos_capabilities(). */
1374 netdev_get_n_queues(const struct netdev *netdev,
1375 const char *type, unsigned int *n_queuesp)
1377 struct netdev_qos_capabilities caps;
1380 retval = netdev_get_qos_capabilities(netdev, type, &caps);
1381 *n_queuesp = caps.n_queues;
1385 /* Queries 'netdev' about its currently configured form of QoS. If successful,
1386 * stores the name of the current form of QoS into '*typep', stores any details
1387 * of configuration as string key-value pairs in 'details', and returns 0. On
1388 * failure, sets '*typep' to NULL and returns a positive errno value.
1390 * A '*typep' of "" indicates that QoS is currently disabled on 'netdev'.
1392 * The caller must initialize 'details' as an empty smap (e.g. with
1393 * smap_init()) before calling this function. The caller must free 'details'
1394 * when it is no longer needed (e.g. with smap_destroy()).
1396 * The caller must not modify or free '*typep'.
1398 * '*typep' will be one of the types returned by netdev_get_qos_types() for
1399 * 'netdev'. The contents of 'details' should be documented as valid for
1400 * '*typep' in the "other_config" column in the "QoS" table in
1401 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)). */
1403 netdev_get_qos(const struct netdev *netdev,
1404 const char **typep, struct smap *details)
1406 const struct netdev_class *class = netdev->netdev_class;
1409 if (class->get_qos) {
1410 retval = class->get_qos(netdev, typep, details);
1413 smap_clear(details);
1417 /* 'netdev' doesn't support QoS, so report that QoS is disabled. */
1423 /* Attempts to reconfigure QoS on 'netdev', changing the form of QoS to 'type'
1424 * with details of configuration from 'details'. Returns 0 if successful,
1425 * otherwise a positive errno value. On error, the previous QoS configuration
1428 * When this function changes the type of QoS (not just 'details'), this also
1429 * resets all queue configuration for 'netdev' to their defaults (which depend
1430 * on the specific type of QoS). Otherwise, the queue configuration for
1431 * 'netdev' is unchanged.
1433 * 'type' should be "" (to disable QoS) or one of the types returned by
1434 * netdev_get_qos_types() for 'netdev'. The contents of 'details' should be
1435 * documented as valid for the given 'type' in the "other_config" column in the
1436 * "QoS" table in vswitchd/vswitch.xml (which is built as
1437 * ovs-vswitchd.conf.db(8)).
1439 * NULL may be specified for 'details' if there are no configuration
1442 netdev_set_qos(struct netdev *netdev,
1443 const char *type, const struct smap *details)
1445 const struct netdev_class *class = netdev->netdev_class;
1451 if (class->set_qos) {
1453 static const struct smap empty = SMAP_INITIALIZER(&empty);
1456 return class->set_qos(netdev, type, details);
1458 return *type ? EOPNOTSUPP : 0;
1462 /* Queries 'netdev' for information about the queue numbered 'queue_id'. If
1463 * successful, adds that information as string key-value pairs to 'details'.
1464 * Returns 0 if successful, otherwise a positive errno value.
1466 * 'queue_id' must be less than the number of queues supported by 'netdev' for
1467 * the current form of QoS (e.g. as returned by netdev_get_n_queues(netdev)).
1469 * The returned contents of 'details' should be documented as valid for the
1470 * given 'type' in the "other_config" column in the "Queue" table in
1471 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1473 * The caller must initialize 'details' (e.g. with smap_init()) before calling
1474 * this function. The caller must free 'details' when it is no longer needed
1475 * (e.g. with smap_destroy()). */
1477 netdev_get_queue(const struct netdev *netdev,
1478 unsigned int queue_id, struct smap *details)
1480 const struct netdev_class *class = netdev->netdev_class;
1483 retval = (class->get_queue
1484 ? class->get_queue(netdev, queue_id, details)
1487 smap_clear(details);
1492 /* Configures the queue numbered 'queue_id' on 'netdev' with the key-value
1493 * string pairs in 'details'. The contents of 'details' should be documented
1494 * as valid for the given 'type' in the "other_config" column in the "Queue"
1495 * table in vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1496 * Returns 0 if successful, otherwise a positive errno value. On failure, the
1497 * given queue's configuration should be unmodified.
1499 * 'queue_id' must be less than the number of queues supported by 'netdev' for
1500 * the current form of QoS (e.g. as returned by netdev_get_n_queues(netdev)).
1502 * This function does not modify 'details', and the caller retains ownership of
1505 netdev_set_queue(struct netdev *netdev,
1506 unsigned int queue_id, const struct smap *details)
1508 const struct netdev_class *class = netdev->netdev_class;
1509 return (class->set_queue
1510 ? class->set_queue(netdev, queue_id, details)
1514 /* Attempts to delete the queue numbered 'queue_id' from 'netdev'. Some kinds
1515 * of QoS may have a fixed set of queues, in which case attempts to delete them
1516 * will fail with EOPNOTSUPP.
1518 * Returns 0 if successful, otherwise a positive errno value. On failure, the
1519 * given queue will be unmodified.
1521 * 'queue_id' must be less than the number of queues supported by 'netdev' for
1522 * the current form of QoS (e.g. as returned by
1523 * netdev_get_n_queues(netdev)). */
1525 netdev_delete_queue(struct netdev *netdev, unsigned int queue_id)
1527 const struct netdev_class *class = netdev->netdev_class;
1528 return (class->delete_queue
1529 ? class->delete_queue(netdev, queue_id)
1533 /* Obtains statistics about 'queue_id' on 'netdev'. On success, returns 0 and
1534 * fills 'stats' with the queue's statistics; individual members of 'stats' may
1535 * be set to all-1-bits if the statistic is unavailable. On failure, returns a
1536 * positive errno value and fills 'stats' with values indicating unsupported
1539 netdev_get_queue_stats(const struct netdev *netdev, unsigned int queue_id,
1540 struct netdev_queue_stats *stats)
1542 const struct netdev_class *class = netdev->netdev_class;
1545 retval = (class->get_queue_stats
1546 ? class->get_queue_stats(netdev, queue_id, stats)
1549 stats->tx_bytes = UINT64_MAX;
1550 stats->tx_packets = UINT64_MAX;
1551 stats->tx_errors = UINT64_MAX;
1552 stats->created = LLONG_MIN;
1557 /* Initializes 'dump' to begin dumping the queues in a netdev.
1559 * This function provides no status indication. An error status for the entire
1560 * dump operation is provided when it is completed by calling
1561 * netdev_queue_dump_done().
1564 netdev_queue_dump_start(struct netdev_queue_dump *dump,
1565 const struct netdev *netdev)
1567 dump->netdev = netdev_ref(netdev);
1568 if (netdev->netdev_class->queue_dump_start) {
1569 dump->error = netdev->netdev_class->queue_dump_start(netdev,
1572 dump->error = EOPNOTSUPP;
1576 /* Attempts to retrieve another queue from 'dump', which must have been
1577 * initialized with netdev_queue_dump_start(). On success, stores a new queue
1578 * ID into '*queue_id', fills 'details' with configuration details for the
1579 * queue, and returns true. On failure, returns false.
1581 * Queues are not necessarily dumped in increasing order of queue ID (or any
1582 * other predictable order).
1584 * Failure might indicate an actual error or merely that the last queue has
1585 * been dumped. An error status for the entire dump operation is provided when
1586 * it is completed by calling netdev_queue_dump_done().
1588 * The returned contents of 'details' should be documented as valid for the
1589 * given 'type' in the "other_config" column in the "Queue" table in
1590 * vswitchd/vswitch.xml (which is built as ovs-vswitchd.conf.db(8)).
1592 * The caller must initialize 'details' (e.g. with smap_init()) before calling
1593 * this function. This function will clear and replace its contents. The
1594 * caller must free 'details' when it is no longer needed (e.g. with
1595 * smap_destroy()). */
1597 netdev_queue_dump_next(struct netdev_queue_dump *dump,
1598 unsigned int *queue_id, struct smap *details)
1600 const struct netdev *netdev = dump->netdev;
1606 dump->error = netdev->netdev_class->queue_dump_next(netdev, dump->state,
1610 netdev->netdev_class->queue_dump_done(netdev, dump->state);
1616 /* Completes queue table dump operation 'dump', which must have been
1617 * initialized with netdev_queue_dump_start(). Returns 0 if the dump operation
1618 * was error-free, otherwise a positive errno value describing the problem. */
1620 netdev_queue_dump_done(struct netdev_queue_dump *dump)
1622 const struct netdev *netdev = dump->netdev;
1623 if (!dump->error && netdev->netdev_class->queue_dump_done) {
1624 dump->error = netdev->netdev_class->queue_dump_done(netdev,
1627 netdev_close(dump->netdev);
1628 return dump->error == EOF ? 0 : dump->error;
1631 /* Iterates over all of 'netdev''s queues, calling 'cb' with the queue's ID,
1632 * its statistics, and the 'aux' specified by the caller. The order of
1633 * iteration is unspecified, but (when successful) each queue is visited
1636 * Calling this function may be more efficient than calling
1637 * netdev_get_queue_stats() for every queue.
1639 * 'cb' must not modify or free the statistics passed in.
1641 * Returns 0 if successful, otherwise a positive errno value. On error, some
1642 * configured queues may not have been included in the iteration. */
1644 netdev_dump_queue_stats(const struct netdev *netdev,
1645 netdev_dump_queue_stats_cb *cb, void *aux)
1647 const struct netdev_class *class = netdev->netdev_class;
1648 return (class->dump_queue_stats
1649 ? class->dump_queue_stats(netdev, cb, aux)
1654 /* Returns the class type of 'netdev'.
1656 * The caller must not free the returned value. */
1658 netdev_get_type(const struct netdev *netdev)
1660 return netdev->netdev_class->type;
1663 /* Returns the class associated with 'netdev'. */
1664 const struct netdev_class *
1665 netdev_get_class(const struct netdev *netdev)
1667 return netdev->netdev_class;
1670 /* Returns the netdev with 'name' or NULL if there is none.
1672 * The caller must free the returned netdev with netdev_close(). */
1674 netdev_from_name(const char *name)
1675 OVS_EXCLUDED(netdev_mutex)
1677 struct netdev *netdev;
1679 ovs_mutex_lock(&netdev_mutex);
1680 netdev = shash_find_data(&netdev_shash, name);
1684 ovs_mutex_unlock(&netdev_mutex);
1689 /* Fills 'device_list' with devices that match 'netdev_class'.
1691 * The caller is responsible for initializing and destroying 'device_list' and
1692 * must close each device on the list. */
1694 netdev_get_devices(const struct netdev_class *netdev_class,
1695 struct shash *device_list)
1696 OVS_EXCLUDED(netdev_mutex)
1698 struct shash_node *node;
1700 ovs_mutex_lock(&netdev_mutex);
1701 SHASH_FOR_EACH (node, &netdev_shash) {
1702 struct netdev *dev = node->data;
1704 if (dev->netdev_class == netdev_class) {
1706 shash_add(device_list, node->name, node->data);
1709 ovs_mutex_unlock(&netdev_mutex);
1712 /* Extracts pointers to all 'netdev-vports' into an array 'vports'
1713 * and returns it. Stores the size of the array into '*size'.
1715 * The caller is responsible for freeing 'vports' and must close
1716 * each 'netdev-vport' in the list. */
1718 netdev_get_vports(size_t *size)
1719 OVS_EXCLUDED(netdev_mutex)
1721 struct netdev **vports;
1722 struct shash_node *node;
1729 /* Explicitly allocates big enough chunk of memory. */
1730 vports = xmalloc(shash_count(&netdev_shash) * sizeof *vports);
1731 ovs_mutex_lock(&netdev_mutex);
1732 SHASH_FOR_EACH (node, &netdev_shash) {
1733 struct netdev *dev = node->data;
1735 if (netdev_vport_is_vport_class(dev->netdev_class)) {
1741 ovs_mutex_unlock(&netdev_mutex);
1748 netdev_get_type_from_name(const char *name)
1750 struct netdev *dev = netdev_from_name(name);
1751 const char *type = dev ? netdev_get_type(dev) : NULL;
1757 netdev_rxq_get_netdev(const struct netdev_rxq *rx)
1759 ovs_assert(rx->netdev->ref_cnt > 0);
1764 netdev_rxq_get_name(const struct netdev_rxq *rx)
1766 return netdev_get_name(netdev_rxq_get_netdev(rx));
1770 restore_all_flags(void *aux OVS_UNUSED)
1772 struct shash_node *node;
1774 SHASH_FOR_EACH (node, &netdev_shash) {
1775 struct netdev *netdev = node->data;
1776 const struct netdev_saved_flags *sf;
1777 enum netdev_flags saved_values;
1778 enum netdev_flags saved_flags;
1780 saved_values = saved_flags = 0;
1781 LIST_FOR_EACH (sf, node, &netdev->saved_flags_list) {
1782 saved_flags |= sf->saved_flags;
1783 saved_values &= ~sf->saved_flags;
1784 saved_values |= sf->saved_flags & sf->saved_values;
1787 enum netdev_flags old_flags;
1789 netdev->netdev_class->update_flags(netdev,
1790 saved_flags & saved_values,
1791 saved_flags & ~saved_values,
1798 netdev_get_change_seq(const struct netdev *netdev)
1800 return netdev->change_seq;