1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * INET An implementation of the TCP/IP protocol suite for the LINUX
4 * operating system. INET is implemented using the BSD Socket
5 * interface as the means of communication with the user level.
7 * Routing netlink socket interface: protocol independent part.
12 * Vitaly E. Lavrov RTA_OK arithmetic was wrong.
15 #include <linux/bitops.h>
16 #include <linux/errno.h>
17 #include <linux/module.h>
18 #include <linux/types.h>
19 #include <linux/socket.h>
20 #include <linux/kernel.h>
21 #include <linux/timer.h>
22 #include <linux/string.h>
23 #include <linux/sockios.h>
24 #include <linux/net.h>
25 #include <linux/fcntl.h>
27 #include <linux/slab.h>
28 #include <linux/interrupt.h>
29 #include <linux/capability.h>
30 #include <linux/skbuff.h>
31 #include <linux/init.h>
32 #include <linux/security.h>
33 #include <linux/mutex.h>
34 #include <linux/if_addr.h>
35 #include <linux/if_bridge.h>
36 #include <linux/if_vlan.h>
37 #include <linux/pci.h>
38 #include <linux/etherdevice.h>
39 #include <linux/bpf.h>
41 #include <linux/uaccess.h>
43 #include <linux/inet.h>
44 #include <linux/netdevice.h>
46 #include <net/protocol.h>
48 #include <net/route.h>
52 #include <net/pkt_sched.h>
53 #include <net/fib_rules.h>
54 #include <net/rtnetlink.h>
55 #include <net/net_namespace.h>
59 #define RTNL_MAX_TYPE 50
60 #define RTNL_SLAVE_MAX_TYPE 40
64 rtnl_dumpit_func dumpit;
70 static DEFINE_MUTEX(rtnl_mutex);
74 mutex_lock(&rtnl_mutex);
76 EXPORT_SYMBOL(rtnl_lock);
78 int rtnl_lock_killable(void)
80 return mutex_lock_killable(&rtnl_mutex);
82 EXPORT_SYMBOL(rtnl_lock_killable);
84 static struct sk_buff *defer_kfree_skb_list;
85 void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
88 tail->next = defer_kfree_skb_list;
89 defer_kfree_skb_list = head;
92 EXPORT_SYMBOL(rtnl_kfree_skbs);
94 void __rtnl_unlock(void)
96 struct sk_buff *head = defer_kfree_skb_list;
98 defer_kfree_skb_list = NULL;
100 /* Ensure that we didn't actually add any TODO item when __rtnl_unlock()
101 * is used. In some places, e.g. in cfg80211, we have code that will do
108 * and because netdev_run_todo() acquires the RTNL for items on the list
109 * we could cause a situation such as this:
112 * unregister_netdevice()
120 * // list not empty now
121 * // because of thread 2
123 * while (!list_empty(...))
128 * However, usage of __rtnl_unlock() is rare, and so we can ensure that
129 * it's not used in cases where something is added to do the list.
131 WARN_ON(!list_empty(&net_todo_list));
133 mutex_unlock(&rtnl_mutex);
136 struct sk_buff *next = head->next;
144 void rtnl_unlock(void)
146 /* This fellow will unlock it for us. */
149 EXPORT_SYMBOL(rtnl_unlock);
151 int rtnl_trylock(void)
153 return mutex_trylock(&rtnl_mutex);
155 EXPORT_SYMBOL(rtnl_trylock);
157 int rtnl_is_locked(void)
159 return mutex_is_locked(&rtnl_mutex);
161 EXPORT_SYMBOL(rtnl_is_locked);
163 bool refcount_dec_and_rtnl_lock(refcount_t *r)
165 return refcount_dec_and_mutex_lock(r, &rtnl_mutex);
167 EXPORT_SYMBOL(refcount_dec_and_rtnl_lock);
169 #ifdef CONFIG_PROVE_LOCKING
170 bool lockdep_rtnl_is_held(void)
172 return lockdep_is_held(&rtnl_mutex);
174 EXPORT_SYMBOL(lockdep_rtnl_is_held);
175 #endif /* #ifdef CONFIG_PROVE_LOCKING */
177 static struct rtnl_link __rcu *__rcu *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
179 static inline int rtm_msgindex(int msgtype)
181 int msgindex = msgtype - RTM_BASE;
184 * msgindex < 0 implies someone tried to register a netlink
185 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
186 * the message type has not been added to linux/rtnetlink.h
188 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
193 static struct rtnl_link *rtnl_get_link(int protocol, int msgtype)
195 struct rtnl_link __rcu **tab;
197 if (protocol >= ARRAY_SIZE(rtnl_msg_handlers))
198 protocol = PF_UNSPEC;
200 tab = rcu_dereference_rtnl(rtnl_msg_handlers[protocol]);
202 tab = rcu_dereference_rtnl(rtnl_msg_handlers[PF_UNSPEC]);
204 return rcu_dereference_rtnl(tab[msgtype]);
207 static int rtnl_register_internal(struct module *owner,
208 int protocol, int msgtype,
209 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
212 struct rtnl_link *link, *old;
213 struct rtnl_link __rcu **tab;
217 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
218 msgindex = rtm_msgindex(msgtype);
221 tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
223 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(void *), GFP_KERNEL);
227 /* ensures we see the 0 stores */
228 rcu_assign_pointer(rtnl_msg_handlers[protocol], tab);
231 old = rtnl_dereference(tab[msgindex]);
233 link = kmemdup(old, sizeof(*old), GFP_KERNEL);
237 link = kzalloc(sizeof(*link), GFP_KERNEL);
242 WARN_ON(link->owner && link->owner != owner);
245 WARN_ON(doit && link->doit && link->doit != doit);
248 WARN_ON(dumpit && link->dumpit && link->dumpit != dumpit);
250 link->dumpit = dumpit;
252 WARN_ON(rtnl_msgtype_kind(msgtype) != RTNL_KIND_DEL &&
253 (flags & RTNL_FLAG_BULK_DEL_SUPPORTED));
254 link->flags |= flags;
256 /* publish protocol:msgtype */
257 rcu_assign_pointer(tab[msgindex], link);
267 * rtnl_register_module - Register a rtnetlink message type
269 * @owner: module registering the hook (THIS_MODULE)
270 * @protocol: Protocol family or PF_UNSPEC
271 * @msgtype: rtnetlink message type
272 * @doit: Function pointer called for each request message
273 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
274 * @flags: rtnl_link_flags to modify behaviour of doit/dumpit functions
276 * Like rtnl_register, but for use by removable modules.
278 int rtnl_register_module(struct module *owner,
279 int protocol, int msgtype,
280 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
283 return rtnl_register_internal(owner, protocol, msgtype,
284 doit, dumpit, flags);
286 EXPORT_SYMBOL_GPL(rtnl_register_module);
289 * rtnl_register - Register a rtnetlink message type
290 * @protocol: Protocol family or PF_UNSPEC
291 * @msgtype: rtnetlink message type
292 * @doit: Function pointer called for each request message
293 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
294 * @flags: rtnl_link_flags to modify behaviour of doit/dumpit functions
296 * Registers the specified function pointers (at least one of them has
297 * to be non-NULL) to be called whenever a request message for the
298 * specified protocol family and message type is received.
300 * The special protocol family PF_UNSPEC may be used to define fallback
301 * function pointers for the case when no entry for the specific protocol
304 void rtnl_register(int protocol, int msgtype,
305 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
310 err = rtnl_register_internal(NULL, protocol, msgtype, doit, dumpit,
313 pr_err("Unable to register rtnetlink message handler, "
314 "protocol = %d, message type = %d\n", protocol, msgtype);
318 * rtnl_unregister - Unregister a rtnetlink message type
319 * @protocol: Protocol family or PF_UNSPEC
320 * @msgtype: rtnetlink message type
322 * Returns 0 on success or a negative error code.
324 int rtnl_unregister(int protocol, int msgtype)
326 struct rtnl_link __rcu **tab;
327 struct rtnl_link *link;
330 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
331 msgindex = rtm_msgindex(msgtype);
334 tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
340 link = rtnl_dereference(tab[msgindex]);
341 RCU_INIT_POINTER(tab[msgindex], NULL);
344 kfree_rcu(link, rcu);
348 EXPORT_SYMBOL_GPL(rtnl_unregister);
351 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
352 * @protocol : Protocol family or PF_UNSPEC
354 * Identical to calling rtnl_unregster() for all registered message types
355 * of a certain protocol family.
357 void rtnl_unregister_all(int protocol)
359 struct rtnl_link __rcu **tab;
360 struct rtnl_link *link;
363 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
366 tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
371 RCU_INIT_POINTER(rtnl_msg_handlers[protocol], NULL);
372 for (msgindex = 0; msgindex < RTM_NR_MSGTYPES; msgindex++) {
373 link = rtnl_dereference(tab[msgindex]);
377 RCU_INIT_POINTER(tab[msgindex], NULL);
378 kfree_rcu(link, rcu);
386 EXPORT_SYMBOL_GPL(rtnl_unregister_all);
388 static LIST_HEAD(link_ops);
390 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
392 const struct rtnl_link_ops *ops;
394 list_for_each_entry(ops, &link_ops, list) {
395 if (!strcmp(ops->kind, kind))
402 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
403 * @ops: struct rtnl_link_ops * to register
405 * The caller must hold the rtnl_mutex. This function should be used
406 * by drivers that create devices during module initialization. It
407 * must be called before registering the devices.
409 * Returns 0 on success or a negative error code.
411 int __rtnl_link_register(struct rtnl_link_ops *ops)
413 if (rtnl_link_ops_get(ops->kind))
416 /* The check for alloc/setup is here because if ops
417 * does not have that filled up, it is not possible
418 * to use the ops for creating device. So do not
419 * fill up dellink as well. That disables rtnl_dellink.
421 if ((ops->alloc || ops->setup) && !ops->dellink)
422 ops->dellink = unregister_netdevice_queue;
424 list_add_tail(&ops->list, &link_ops);
427 EXPORT_SYMBOL_GPL(__rtnl_link_register);
430 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
431 * @ops: struct rtnl_link_ops * to register
433 * Returns 0 on success or a negative error code.
435 int rtnl_link_register(struct rtnl_link_ops *ops)
439 /* Sanity-check max sizes to avoid stack buffer overflow. */
440 if (WARN_ON(ops->maxtype > RTNL_MAX_TYPE ||
441 ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE))
445 err = __rtnl_link_register(ops);
449 EXPORT_SYMBOL_GPL(rtnl_link_register);
451 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
453 struct net_device *dev;
454 LIST_HEAD(list_kill);
456 for_each_netdev(net, dev) {
457 if (dev->rtnl_link_ops == ops)
458 ops->dellink(dev, &list_kill);
460 unregister_netdevice_many(&list_kill);
464 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
465 * @ops: struct rtnl_link_ops * to unregister
467 * The caller must hold the rtnl_mutex and guarantee net_namespace_list
468 * integrity (hold pernet_ops_rwsem for writing to close the race
469 * with setup_net() and cleanup_net()).
471 void __rtnl_link_unregister(struct rtnl_link_ops *ops)
476 __rtnl_kill_links(net, ops);
478 list_del(&ops->list);
480 EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
482 /* Return with the rtnl_lock held when there are no network
483 * devices unregistering in any network namespace.
485 static void rtnl_lock_unregistering_all(void)
489 DEFINE_WAIT_FUNC(wait, woken_wake_function);
491 add_wait_queue(&netdev_unregistering_wq, &wait);
493 unregistering = false;
495 /* We held write locked pernet_ops_rwsem, and parallel
496 * setup_net() and cleanup_net() are not possible.
499 if (atomic_read(&net->dev_unreg_count) > 0) {
500 unregistering = true;
508 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
510 remove_wait_queue(&netdev_unregistering_wq, &wait);
514 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
515 * @ops: struct rtnl_link_ops * to unregister
517 void rtnl_link_unregister(struct rtnl_link_ops *ops)
519 /* Close the race with setup_net() and cleanup_net() */
520 down_write(&pernet_ops_rwsem);
521 rtnl_lock_unregistering_all();
522 __rtnl_link_unregister(ops);
524 up_write(&pernet_ops_rwsem);
526 EXPORT_SYMBOL_GPL(rtnl_link_unregister);
528 static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
530 struct net_device *master_dev;
531 const struct rtnl_link_ops *ops;
536 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
540 ops = master_dev->rtnl_link_ops;
541 if (!ops || !ops->get_slave_size)
543 /* IFLA_INFO_SLAVE_DATA + nested data */
544 size = nla_total_size(sizeof(struct nlattr)) +
545 ops->get_slave_size(master_dev, dev);
552 static size_t rtnl_link_get_size(const struct net_device *dev)
554 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
560 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
561 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
564 /* IFLA_INFO_DATA + nested data */
565 size += nla_total_size(sizeof(struct nlattr)) +
568 if (ops->get_xstats_size)
569 /* IFLA_INFO_XSTATS */
570 size += nla_total_size(ops->get_xstats_size(dev));
572 size += rtnl_link_get_slave_info_data_size(dev);
577 static LIST_HEAD(rtnl_af_ops);
579 static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
581 const struct rtnl_af_ops *ops;
585 list_for_each_entry(ops, &rtnl_af_ops, list) {
586 if (ops->family == family)
594 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
595 * @ops: struct rtnl_af_ops * to register
597 * Returns 0 on success or a negative error code.
599 void rtnl_af_register(struct rtnl_af_ops *ops)
602 list_add_tail_rcu(&ops->list, &rtnl_af_ops);
605 EXPORT_SYMBOL_GPL(rtnl_af_register);
608 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
609 * @ops: struct rtnl_af_ops * to unregister
611 void rtnl_af_unregister(struct rtnl_af_ops *ops)
614 list_del_rcu(&ops->list);
619 EXPORT_SYMBOL_GPL(rtnl_af_unregister);
621 static size_t rtnl_link_get_af_size(const struct net_device *dev,
624 struct rtnl_af_ops *af_ops;
628 size = nla_total_size(sizeof(struct nlattr));
631 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
632 if (af_ops->get_link_af_size) {
633 /* AF_* + nested data */
634 size += nla_total_size(sizeof(struct nlattr)) +
635 af_ops->get_link_af_size(dev, ext_filter_mask);
643 static bool rtnl_have_link_slave_info(const struct net_device *dev)
645 struct net_device *master_dev;
650 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
651 if (master_dev && master_dev->rtnl_link_ops)
657 static int rtnl_link_slave_info_fill(struct sk_buff *skb,
658 const struct net_device *dev)
660 struct net_device *master_dev;
661 const struct rtnl_link_ops *ops;
662 struct nlattr *slave_data;
665 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
668 ops = master_dev->rtnl_link_ops;
671 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
673 if (ops->fill_slave_info) {
674 slave_data = nla_nest_start_noflag(skb, IFLA_INFO_SLAVE_DATA);
677 err = ops->fill_slave_info(skb, master_dev, dev);
679 goto err_cancel_slave_data;
680 nla_nest_end(skb, slave_data);
684 err_cancel_slave_data:
685 nla_nest_cancel(skb, slave_data);
689 static int rtnl_link_info_fill(struct sk_buff *skb,
690 const struct net_device *dev)
692 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
698 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
700 if (ops->fill_xstats) {
701 err = ops->fill_xstats(skb, dev);
705 if (ops->fill_info) {
706 data = nla_nest_start_noflag(skb, IFLA_INFO_DATA);
709 err = ops->fill_info(skb, dev);
711 goto err_cancel_data;
712 nla_nest_end(skb, data);
717 nla_nest_cancel(skb, data);
721 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
723 struct nlattr *linkinfo;
726 linkinfo = nla_nest_start_noflag(skb, IFLA_LINKINFO);
727 if (linkinfo == NULL)
730 err = rtnl_link_info_fill(skb, dev);
732 goto err_cancel_link;
734 err = rtnl_link_slave_info_fill(skb, dev);
736 goto err_cancel_link;
738 nla_nest_end(skb, linkinfo);
742 nla_nest_cancel(skb, linkinfo);
747 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
749 struct sock *rtnl = net->rtnl;
751 return nlmsg_notify(rtnl, skb, pid, group, echo, GFP_KERNEL);
754 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
756 struct sock *rtnl = net->rtnl;
758 return nlmsg_unicast(rtnl, skb, pid);
760 EXPORT_SYMBOL(rtnl_unicast);
762 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
763 struct nlmsghdr *nlh, gfp_t flags)
765 struct sock *rtnl = net->rtnl;
767 nlmsg_notify(rtnl, skb, pid, group, nlmsg_report(nlh), flags);
769 EXPORT_SYMBOL(rtnl_notify);
771 void rtnl_set_sk_err(struct net *net, u32 group, int error)
773 struct sock *rtnl = net->rtnl;
775 netlink_set_err(rtnl, 0, group, error);
777 EXPORT_SYMBOL(rtnl_set_sk_err);
779 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
784 /* nothing is dumped for dst_default_metrics, so just skip the loop */
785 if (metrics == dst_default_metrics.metrics)
788 mx = nla_nest_start_noflag(skb, RTA_METRICS);
792 for (i = 0; i < RTAX_MAX; i++) {
794 if (i == RTAX_CC_ALGO - 1) {
795 char tmp[TCP_CA_NAME_MAX], *name;
797 name = tcp_ca_get_name_by_key(metrics[i], tmp);
800 if (nla_put_string(skb, i + 1, name))
801 goto nla_put_failure;
802 } else if (i == RTAX_FEATURES - 1) {
803 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
807 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
808 if (nla_put_u32(skb, i + 1, user_features))
809 goto nla_put_failure;
811 if (nla_put_u32(skb, i + 1, metrics[i]))
812 goto nla_put_failure;
819 nla_nest_cancel(skb, mx);
823 return nla_nest_end(skb, mx);
826 nla_nest_cancel(skb, mx);
829 EXPORT_SYMBOL(rtnetlink_put_metrics);
831 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
832 long expires, u32 error)
834 struct rta_cacheinfo ci = {
840 ci.rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse);
841 ci.rta_used = dst->__use;
842 ci.rta_clntref = atomic_read(&dst->__refcnt);
847 clock = jiffies_to_clock_t(abs(expires));
848 clock = min_t(unsigned long, clock, INT_MAX);
849 ci.rta_expires = (expires > 0) ? clock : -clock;
851 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
853 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
855 static void set_operstate(struct net_device *dev, unsigned char transition)
857 unsigned char operstate = dev->operstate;
859 switch (transition) {
861 if ((operstate == IF_OPER_DORMANT ||
862 operstate == IF_OPER_TESTING ||
863 operstate == IF_OPER_UNKNOWN) &&
864 !netif_dormant(dev) && !netif_testing(dev))
865 operstate = IF_OPER_UP;
868 case IF_OPER_TESTING:
869 if (netif_oper_up(dev))
870 operstate = IF_OPER_TESTING;
873 case IF_OPER_DORMANT:
874 if (netif_oper_up(dev))
875 operstate = IF_OPER_DORMANT;
879 if (dev->operstate != operstate) {
880 write_lock(&dev_base_lock);
881 dev->operstate = operstate;
882 write_unlock(&dev_base_lock);
883 netdev_state_change(dev);
887 static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
889 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
890 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
893 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
894 const struct ifinfomsg *ifm)
896 unsigned int flags = ifm->ifi_flags;
898 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
900 flags = (flags & ifm->ifi_change) |
901 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
906 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
907 const struct rtnl_link_stats64 *b)
909 a->rx_packets = b->rx_packets;
910 a->tx_packets = b->tx_packets;
911 a->rx_bytes = b->rx_bytes;
912 a->tx_bytes = b->tx_bytes;
913 a->rx_errors = b->rx_errors;
914 a->tx_errors = b->tx_errors;
915 a->rx_dropped = b->rx_dropped;
916 a->tx_dropped = b->tx_dropped;
918 a->multicast = b->multicast;
919 a->collisions = b->collisions;
921 a->rx_length_errors = b->rx_length_errors;
922 a->rx_over_errors = b->rx_over_errors;
923 a->rx_crc_errors = b->rx_crc_errors;
924 a->rx_frame_errors = b->rx_frame_errors;
925 a->rx_fifo_errors = b->rx_fifo_errors;
926 a->rx_missed_errors = b->rx_missed_errors;
928 a->tx_aborted_errors = b->tx_aborted_errors;
929 a->tx_carrier_errors = b->tx_carrier_errors;
930 a->tx_fifo_errors = b->tx_fifo_errors;
931 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
932 a->tx_window_errors = b->tx_window_errors;
934 a->rx_compressed = b->rx_compressed;
935 a->tx_compressed = b->tx_compressed;
937 a->rx_nohandler = b->rx_nohandler;
941 static inline int rtnl_vfinfo_size(const struct net_device *dev,
944 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) {
945 int num_vfs = dev_num_vf(dev->dev.parent);
946 size_t size = nla_total_size(0);
949 nla_total_size(sizeof(struct ifla_vf_mac)) +
950 nla_total_size(sizeof(struct ifla_vf_broadcast)) +
951 nla_total_size(sizeof(struct ifla_vf_vlan)) +
952 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */
953 nla_total_size(MAX_VLAN_LIST_LEN *
954 sizeof(struct ifla_vf_vlan_info)) +
955 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
956 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
957 nla_total_size(sizeof(struct ifla_vf_rate)) +
958 nla_total_size(sizeof(struct ifla_vf_link_state)) +
959 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
960 nla_total_size(0) + /* nest IFLA_VF_STATS */
961 /* IFLA_VF_STATS_RX_PACKETS */
962 nla_total_size_64bit(sizeof(__u64)) +
963 /* IFLA_VF_STATS_TX_PACKETS */
964 nla_total_size_64bit(sizeof(__u64)) +
965 /* IFLA_VF_STATS_RX_BYTES */
966 nla_total_size_64bit(sizeof(__u64)) +
967 /* IFLA_VF_STATS_TX_BYTES */
968 nla_total_size_64bit(sizeof(__u64)) +
969 /* IFLA_VF_STATS_BROADCAST */
970 nla_total_size_64bit(sizeof(__u64)) +
971 /* IFLA_VF_STATS_MULTICAST */
972 nla_total_size_64bit(sizeof(__u64)) +
973 /* IFLA_VF_STATS_RX_DROPPED */
974 nla_total_size_64bit(sizeof(__u64)) +
975 /* IFLA_VF_STATS_TX_DROPPED */
976 nla_total_size_64bit(sizeof(__u64)) +
977 nla_total_size(sizeof(struct ifla_vf_trust)));
983 static size_t rtnl_port_size(const struct net_device *dev,
986 size_t port_size = nla_total_size(4) /* PORT_VF */
987 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
988 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
989 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
990 + nla_total_size(1) /* PROT_VDP_REQUEST */
991 + nla_total_size(2); /* PORT_VDP_RESPONSE */
992 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
993 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
995 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
998 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
999 !(ext_filter_mask & RTEXT_FILTER_VF))
1001 if (dev_num_vf(dev->dev.parent))
1002 return port_self_size + vf_ports_size +
1003 vf_port_size * dev_num_vf(dev->dev.parent);
1005 return port_self_size;
1008 static size_t rtnl_xdp_size(void)
1010 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */
1011 nla_total_size(1) + /* XDP_ATTACHED */
1012 nla_total_size(4) + /* XDP_PROG_ID (or 1st mode) */
1013 nla_total_size(4); /* XDP_<mode>_PROG_ID */
1018 static size_t rtnl_prop_list_size(const struct net_device *dev)
1020 struct netdev_name_node *name_node;
1023 if (list_empty(&dev->name_node->list))
1025 size = nla_total_size(0);
1026 list_for_each_entry(name_node, &dev->name_node->list, list)
1027 size += nla_total_size(ALTIFNAMSIZ);
1031 static size_t rtnl_proto_down_size(const struct net_device *dev)
1033 size_t size = nla_total_size(1);
1035 if (dev->proto_down_reason)
1036 size += nla_total_size(0) + nla_total_size(4);
1041 static noinline size_t if_nlmsg_size(const struct net_device *dev,
1042 u32 ext_filter_mask)
1044 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
1045 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
1046 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
1047 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
1048 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
1049 + nla_total_size(sizeof(struct rtnl_link_stats))
1050 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
1051 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
1052 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
1053 + nla_total_size(4) /* IFLA_TXQLEN */
1054 + nla_total_size(4) /* IFLA_WEIGHT */
1055 + nla_total_size(4) /* IFLA_MTU */
1056 + nla_total_size(4) /* IFLA_LINK */
1057 + nla_total_size(4) /* IFLA_MASTER */
1058 + nla_total_size(1) /* IFLA_CARRIER */
1059 + nla_total_size(4) /* IFLA_PROMISCUITY */
1060 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
1061 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
1062 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
1063 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
1064 + nla_total_size(4) /* IFLA_GRO_MAX_SIZE */
1065 + nla_total_size(4) /* IFLA_TSO_MAX_SIZE */
1066 + nla_total_size(4) /* IFLA_TSO_MAX_SEGS */
1067 + nla_total_size(1) /* IFLA_OPERSTATE */
1068 + nla_total_size(1) /* IFLA_LINKMODE */
1069 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
1070 + nla_total_size(4) /* IFLA_LINK_NETNSID */
1071 + nla_total_size(4) /* IFLA_GROUP */
1072 + nla_total_size(ext_filter_mask
1073 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
1074 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
1075 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
1076 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
1077 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
1078 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
1079 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
1080 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
1081 + rtnl_xdp_size() /* IFLA_XDP */
1082 + nla_total_size(4) /* IFLA_EVENT */
1083 + nla_total_size(4) /* IFLA_NEW_NETNSID */
1084 + nla_total_size(4) /* IFLA_NEW_IFINDEX */
1085 + rtnl_proto_down_size(dev) /* proto down */
1086 + nla_total_size(4) /* IFLA_TARGET_NETNSID */
1087 + nla_total_size(4) /* IFLA_CARRIER_UP_COUNT */
1088 + nla_total_size(4) /* IFLA_CARRIER_DOWN_COUNT */
1089 + nla_total_size(4) /* IFLA_MIN_MTU */
1090 + nla_total_size(4) /* IFLA_MAX_MTU */
1091 + rtnl_prop_list_size(dev)
1092 + nla_total_size(MAX_ADDR_LEN) /* IFLA_PERM_ADDRESS */
1096 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
1098 struct nlattr *vf_ports;
1099 struct nlattr *vf_port;
1103 vf_ports = nla_nest_start_noflag(skb, IFLA_VF_PORTS);
1107 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
1108 vf_port = nla_nest_start_noflag(skb, IFLA_VF_PORT);
1110 goto nla_put_failure;
1111 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
1112 goto nla_put_failure;
1113 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
1114 if (err == -EMSGSIZE)
1115 goto nla_put_failure;
1117 nla_nest_cancel(skb, vf_port);
1120 nla_nest_end(skb, vf_port);
1123 nla_nest_end(skb, vf_ports);
1128 nla_nest_cancel(skb, vf_ports);
1132 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
1134 struct nlattr *port_self;
1137 port_self = nla_nest_start_noflag(skb, IFLA_PORT_SELF);
1141 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
1143 nla_nest_cancel(skb, port_self);
1144 return (err == -EMSGSIZE) ? err : 0;
1147 nla_nest_end(skb, port_self);
1152 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1153 u32 ext_filter_mask)
1157 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1158 !(ext_filter_mask & RTEXT_FILTER_VF))
1161 err = rtnl_port_self_fill(skb, dev);
1165 if (dev_num_vf(dev->dev.parent)) {
1166 err = rtnl_vf_ports_fill(skb, dev);
1174 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1177 struct netdev_phys_item_id ppid;
1179 err = dev_get_phys_port_id(dev, &ppid);
1181 if (err == -EOPNOTSUPP)
1186 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1192 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1194 char name[IFNAMSIZ];
1197 err = dev_get_phys_port_name(dev, name, sizeof(name));
1199 if (err == -EOPNOTSUPP)
1204 if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
1210 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1212 struct netdev_phys_item_id ppid = { };
1215 err = dev_get_port_parent_id(dev, &ppid, false);
1217 if (err == -EOPNOTSUPP)
1222 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, ppid.id_len, ppid.id))
1228 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1229 struct net_device *dev)
1231 struct rtnl_link_stats64 *sp;
1232 struct nlattr *attr;
1234 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1235 sizeof(struct rtnl_link_stats64), IFLA_PAD);
1239 sp = nla_data(attr);
1240 dev_get_stats(dev, sp);
1242 attr = nla_reserve(skb, IFLA_STATS,
1243 sizeof(struct rtnl_link_stats));
1247 copy_rtnl_link_stats(nla_data(attr), sp);
1252 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1253 struct net_device *dev,
1255 struct nlattr *vfinfo)
1257 struct ifla_vf_rss_query_en vf_rss_query_en;
1258 struct nlattr *vf, *vfstats, *vfvlanlist;
1259 struct ifla_vf_link_state vf_linkstate;
1260 struct ifla_vf_vlan_info vf_vlan_info;
1261 struct ifla_vf_spoofchk vf_spoofchk;
1262 struct ifla_vf_tx_rate vf_tx_rate;
1263 struct ifla_vf_stats vf_stats;
1264 struct ifla_vf_trust vf_trust;
1265 struct ifla_vf_vlan vf_vlan;
1266 struct ifla_vf_rate vf_rate;
1267 struct ifla_vf_mac vf_mac;
1268 struct ifla_vf_broadcast vf_broadcast;
1269 struct ifla_vf_info ivi;
1270 struct ifla_vf_guid node_guid;
1271 struct ifla_vf_guid port_guid;
1273 memset(&ivi, 0, sizeof(ivi));
1275 /* Not all SR-IOV capable drivers support the
1276 * spoofcheck and "RSS query enable" query. Preset to
1277 * -1 so the user space tool can detect that the driver
1278 * didn't report anything.
1281 ivi.rss_query_en = -1;
1283 /* The default value for VF link state is "auto"
1284 * IFLA_VF_LINK_STATE_AUTO which equals zero
1287 /* VLAN Protocol by default is 802.1Q */
1288 ivi.vlan_proto = htons(ETH_P_8021Q);
1289 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1292 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
1293 memset(&node_guid, 0, sizeof(node_guid));
1294 memset(&port_guid, 0, sizeof(port_guid));
1303 vf_rss_query_en.vf =
1306 port_guid.vf = ivi.vf;
1308 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1309 memcpy(vf_broadcast.broadcast, dev->broadcast, dev->addr_len);
1310 vf_vlan.vlan = ivi.vlan;
1311 vf_vlan.qos = ivi.qos;
1312 vf_vlan_info.vlan = ivi.vlan;
1313 vf_vlan_info.qos = ivi.qos;
1314 vf_vlan_info.vlan_proto = ivi.vlan_proto;
1315 vf_tx_rate.rate = ivi.max_tx_rate;
1316 vf_rate.min_tx_rate = ivi.min_tx_rate;
1317 vf_rate.max_tx_rate = ivi.max_tx_rate;
1318 vf_spoofchk.setting = ivi.spoofchk;
1319 vf_linkstate.link_state = ivi.linkstate;
1320 vf_rss_query_en.setting = ivi.rss_query_en;
1321 vf_trust.setting = ivi.trusted;
1322 vf = nla_nest_start_noflag(skb, IFLA_VF_INFO);
1324 goto nla_put_vfinfo_failure;
1325 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1326 nla_put(skb, IFLA_VF_BROADCAST, sizeof(vf_broadcast), &vf_broadcast) ||
1327 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1328 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1330 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1332 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1334 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1336 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1337 sizeof(vf_rss_query_en),
1338 &vf_rss_query_en) ||
1339 nla_put(skb, IFLA_VF_TRUST,
1340 sizeof(vf_trust), &vf_trust))
1341 goto nla_put_vf_failure;
1343 if (dev->netdev_ops->ndo_get_vf_guid &&
1344 !dev->netdev_ops->ndo_get_vf_guid(dev, vfs_num, &node_guid,
1346 if (nla_put(skb, IFLA_VF_IB_NODE_GUID, sizeof(node_guid),
1348 nla_put(skb, IFLA_VF_IB_PORT_GUID, sizeof(port_guid),
1350 goto nla_put_vf_failure;
1352 vfvlanlist = nla_nest_start_noflag(skb, IFLA_VF_VLAN_LIST);
1354 goto nla_put_vf_failure;
1355 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1357 nla_nest_cancel(skb, vfvlanlist);
1358 goto nla_put_vf_failure;
1360 nla_nest_end(skb, vfvlanlist);
1361 memset(&vf_stats, 0, sizeof(vf_stats));
1362 if (dev->netdev_ops->ndo_get_vf_stats)
1363 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1365 vfstats = nla_nest_start_noflag(skb, IFLA_VF_STATS);
1367 goto nla_put_vf_failure;
1368 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1369 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1370 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1371 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1372 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1373 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1374 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1375 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1376 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1377 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1378 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
1379 vf_stats.multicast, IFLA_VF_STATS_PAD) ||
1380 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_DROPPED,
1381 vf_stats.rx_dropped, IFLA_VF_STATS_PAD) ||
1382 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_DROPPED,
1383 vf_stats.tx_dropped, IFLA_VF_STATS_PAD)) {
1384 nla_nest_cancel(skb, vfstats);
1385 goto nla_put_vf_failure;
1387 nla_nest_end(skb, vfstats);
1388 nla_nest_end(skb, vf);
1392 nla_nest_cancel(skb, vf);
1393 nla_put_vfinfo_failure:
1394 nla_nest_cancel(skb, vfinfo);
1398 static noinline_for_stack int rtnl_fill_vf(struct sk_buff *skb,
1399 struct net_device *dev,
1400 u32 ext_filter_mask)
1402 struct nlattr *vfinfo;
1405 if (!dev->dev.parent || ((ext_filter_mask & RTEXT_FILTER_VF) == 0))
1408 num_vfs = dev_num_vf(dev->dev.parent);
1409 if (nla_put_u32(skb, IFLA_NUM_VF, num_vfs))
1412 if (!dev->netdev_ops->ndo_get_vf_config)
1415 vfinfo = nla_nest_start_noflag(skb, IFLA_VFINFO_LIST);
1419 for (i = 0; i < num_vfs; i++) {
1420 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1424 nla_nest_end(skb, vfinfo);
1428 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1430 struct rtnl_link_ifmap map;
1432 memset(&map, 0, sizeof(map));
1433 map.mem_start = dev->mem_start;
1434 map.mem_end = dev->mem_end;
1435 map.base_addr = dev->base_addr;
1438 map.port = dev->if_port;
1440 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
1446 static u32 rtnl_xdp_prog_skb(struct net_device *dev)
1448 const struct bpf_prog *generic_xdp_prog;
1452 generic_xdp_prog = rtnl_dereference(dev->xdp_prog);
1453 if (!generic_xdp_prog)
1455 return generic_xdp_prog->aux->id;
1458 static u32 rtnl_xdp_prog_drv(struct net_device *dev)
1460 return dev_xdp_prog_id(dev, XDP_MODE_DRV);
1463 static u32 rtnl_xdp_prog_hw(struct net_device *dev)
1465 return dev_xdp_prog_id(dev, XDP_MODE_HW);
1468 static int rtnl_xdp_report_one(struct sk_buff *skb, struct net_device *dev,
1469 u32 *prog_id, u8 *mode, u8 tgt_mode, u32 attr,
1470 u32 (*get_prog_id)(struct net_device *dev))
1475 curr_id = get_prog_id(dev);
1480 err = nla_put_u32(skb, attr, curr_id);
1484 if (*mode != XDP_ATTACHED_NONE)
1485 *mode = XDP_ATTACHED_MULTI;
1492 static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1499 xdp = nla_nest_start_noflag(skb, IFLA_XDP);
1504 mode = XDP_ATTACHED_NONE;
1505 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_SKB,
1506 IFLA_XDP_SKB_PROG_ID, rtnl_xdp_prog_skb);
1509 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_DRV,
1510 IFLA_XDP_DRV_PROG_ID, rtnl_xdp_prog_drv);
1513 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_HW,
1514 IFLA_XDP_HW_PROG_ID, rtnl_xdp_prog_hw);
1518 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, mode);
1522 if (prog_id && mode != XDP_ATTACHED_MULTI) {
1523 err = nla_put_u32(skb, IFLA_XDP_PROG_ID, prog_id);
1528 nla_nest_end(skb, xdp);
1532 nla_nest_cancel(skb, xdp);
1536 static u32 rtnl_get_event(unsigned long event)
1538 u32 rtnl_event_type = IFLA_EVENT_NONE;
1542 rtnl_event_type = IFLA_EVENT_REBOOT;
1544 case NETDEV_FEAT_CHANGE:
1545 rtnl_event_type = IFLA_EVENT_FEATURES;
1547 case NETDEV_BONDING_FAILOVER:
1548 rtnl_event_type = IFLA_EVENT_BONDING_FAILOVER;
1550 case NETDEV_NOTIFY_PEERS:
1551 rtnl_event_type = IFLA_EVENT_NOTIFY_PEERS;
1553 case NETDEV_RESEND_IGMP:
1554 rtnl_event_type = IFLA_EVENT_IGMP_RESEND;
1556 case NETDEV_CHANGEINFODATA:
1557 rtnl_event_type = IFLA_EVENT_BONDING_OPTIONS;
1563 return rtnl_event_type;
1566 static int put_master_ifindex(struct sk_buff *skb, struct net_device *dev)
1568 const struct net_device *upper_dev;
1573 upper_dev = netdev_master_upper_dev_get_rcu(dev);
1575 ret = nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex);
1581 static int nla_put_iflink(struct sk_buff *skb, const struct net_device *dev,
1584 int ifindex = dev_get_iflink(dev);
1586 if (force || dev->ifindex != ifindex)
1587 return nla_put_u32(skb, IFLA_LINK, ifindex);
1592 static noinline_for_stack int nla_put_ifalias(struct sk_buff *skb,
1593 struct net_device *dev)
1598 ret = dev_get_alias(dev, buf, sizeof(buf));
1599 return ret > 0 ? nla_put_string(skb, IFLA_IFALIAS, buf) : 0;
1602 static int rtnl_fill_link_netnsid(struct sk_buff *skb,
1603 const struct net_device *dev,
1604 struct net *src_net, gfp_t gfp)
1606 bool put_iflink = false;
1608 if (dev->rtnl_link_ops && dev->rtnl_link_ops->get_link_net) {
1609 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1611 if (!net_eq(dev_net(dev), link_net)) {
1612 int id = peernet2id_alloc(src_net, link_net, gfp);
1614 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1621 return nla_put_iflink(skb, dev, put_iflink);
1624 static int rtnl_fill_link_af(struct sk_buff *skb,
1625 const struct net_device *dev,
1626 u32 ext_filter_mask)
1628 const struct rtnl_af_ops *af_ops;
1629 struct nlattr *af_spec;
1631 af_spec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
1635 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
1639 if (!af_ops->fill_link_af)
1642 af = nla_nest_start_noflag(skb, af_ops->family);
1646 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1648 * Caller may return ENODATA to indicate that there
1649 * was no data to be dumped. This is not an error, it
1650 * means we should trim the attribute header and
1653 if (err == -ENODATA)
1654 nla_nest_cancel(skb, af);
1658 nla_nest_end(skb, af);
1661 nla_nest_end(skb, af_spec);
1665 static int rtnl_fill_alt_ifnames(struct sk_buff *skb,
1666 const struct net_device *dev)
1668 struct netdev_name_node *name_node;
1671 list_for_each_entry(name_node, &dev->name_node->list, list) {
1672 if (nla_put_string(skb, IFLA_ALT_IFNAME, name_node->name))
1679 static int rtnl_fill_prop_list(struct sk_buff *skb,
1680 const struct net_device *dev)
1682 struct nlattr *prop_list;
1685 prop_list = nla_nest_start(skb, IFLA_PROP_LIST);
1689 ret = rtnl_fill_alt_ifnames(skb, dev);
1693 nla_nest_end(skb, prop_list);
1697 nla_nest_cancel(skb, prop_list);
1701 static int rtnl_fill_proto_down(struct sk_buff *skb,
1702 const struct net_device *dev)
1707 if (nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
1708 goto nla_put_failure;
1710 preason = dev->proto_down_reason;
1714 pr = nla_nest_start(skb, IFLA_PROTO_DOWN_REASON);
1718 if (nla_put_u32(skb, IFLA_PROTO_DOWN_REASON_VALUE, preason)) {
1719 nla_nest_cancel(skb, pr);
1720 goto nla_put_failure;
1723 nla_nest_end(skb, pr);
1730 static int rtnl_fill_ifinfo(struct sk_buff *skb,
1731 struct net_device *dev, struct net *src_net,
1732 int type, u32 pid, u32 seq, u32 change,
1733 unsigned int flags, u32 ext_filter_mask,
1734 u32 event, int *new_nsid, int new_ifindex,
1735 int tgt_netnsid, gfp_t gfp)
1737 struct ifinfomsg *ifm;
1738 struct nlmsghdr *nlh;
1739 struct Qdisc *qdisc;
1742 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1746 ifm = nlmsg_data(nlh);
1747 ifm->ifi_family = AF_UNSPEC;
1749 ifm->ifi_type = dev->type;
1750 ifm->ifi_index = dev->ifindex;
1751 ifm->ifi_flags = dev_get_flags(dev);
1752 ifm->ifi_change = change;
1754 if (tgt_netnsid >= 0 && nla_put_s32(skb, IFLA_TARGET_NETNSID, tgt_netnsid))
1755 goto nla_put_failure;
1757 qdisc = rtnl_dereference(dev->qdisc);
1758 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1759 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1760 nla_put_u8(skb, IFLA_OPERSTATE,
1761 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1762 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1763 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1764 nla_put_u32(skb, IFLA_MIN_MTU, dev->min_mtu) ||
1765 nla_put_u32(skb, IFLA_MAX_MTU, dev->max_mtu) ||
1766 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1767 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
1768 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1769 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1770 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1771 nla_put_u32(skb, IFLA_GRO_MAX_SIZE, dev->gro_max_size) ||
1772 nla_put_u32(skb, IFLA_TSO_MAX_SIZE, dev->tso_max_size) ||
1773 nla_put_u32(skb, IFLA_TSO_MAX_SEGS, dev->tso_max_segs) ||
1775 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1777 put_master_ifindex(skb, dev) ||
1778 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1780 nla_put_string(skb, IFLA_QDISC, qdisc->ops->id)) ||
1781 nla_put_ifalias(skb, dev) ||
1782 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1783 atomic_read(&dev->carrier_up_count) +
1784 atomic_read(&dev->carrier_down_count)) ||
1785 nla_put_u32(skb, IFLA_CARRIER_UP_COUNT,
1786 atomic_read(&dev->carrier_up_count)) ||
1787 nla_put_u32(skb, IFLA_CARRIER_DOWN_COUNT,
1788 atomic_read(&dev->carrier_down_count)))
1789 goto nla_put_failure;
1791 if (rtnl_fill_proto_down(skb, dev))
1792 goto nla_put_failure;
1794 if (event != IFLA_EVENT_NONE) {
1795 if (nla_put_u32(skb, IFLA_EVENT, event))
1796 goto nla_put_failure;
1799 if (rtnl_fill_link_ifmap(skb, dev))
1800 goto nla_put_failure;
1802 if (dev->addr_len) {
1803 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1804 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1805 goto nla_put_failure;
1808 if (rtnl_phys_port_id_fill(skb, dev))
1809 goto nla_put_failure;
1811 if (rtnl_phys_port_name_fill(skb, dev))
1812 goto nla_put_failure;
1814 if (rtnl_phys_switch_id_fill(skb, dev))
1815 goto nla_put_failure;
1817 if (rtnl_fill_stats(skb, dev))
1818 goto nla_put_failure;
1820 if (rtnl_fill_vf(skb, dev, ext_filter_mask))
1821 goto nla_put_failure;
1823 if (rtnl_port_fill(skb, dev, ext_filter_mask))
1824 goto nla_put_failure;
1826 if (rtnl_xdp_fill(skb, dev))
1827 goto nla_put_failure;
1829 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1830 if (rtnl_link_fill(skb, dev) < 0)
1831 goto nla_put_failure;
1834 if (rtnl_fill_link_netnsid(skb, dev, src_net, gfp))
1835 goto nla_put_failure;
1838 nla_put_s32(skb, IFLA_NEW_NETNSID, *new_nsid) < 0)
1839 goto nla_put_failure;
1841 nla_put_s32(skb, IFLA_NEW_IFINDEX, new_ifindex) < 0)
1842 goto nla_put_failure;
1844 if (memchr_inv(dev->perm_addr, '\0', dev->addr_len) &&
1845 nla_put(skb, IFLA_PERM_ADDRESS, dev->addr_len, dev->perm_addr))
1846 goto nla_put_failure;
1849 if (rtnl_fill_link_af(skb, dev, ext_filter_mask))
1850 goto nla_put_failure_rcu;
1853 if (rtnl_fill_prop_list(skb, dev))
1854 goto nla_put_failure;
1856 if (dev->dev.parent &&
1857 nla_put_string(skb, IFLA_PARENT_DEV_NAME,
1858 dev_name(dev->dev.parent)))
1859 goto nla_put_failure;
1861 if (dev->dev.parent && dev->dev.parent->bus &&
1862 nla_put_string(skb, IFLA_PARENT_DEV_BUS_NAME,
1863 dev->dev.parent->bus->name))
1864 goto nla_put_failure;
1866 nlmsg_end(skb, nlh);
1869 nla_put_failure_rcu:
1872 nlmsg_cancel(skb, nlh);
1876 static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1877 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1878 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1879 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1880 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1881 [IFLA_MTU] = { .type = NLA_U32 },
1882 [IFLA_LINK] = { .type = NLA_U32 },
1883 [IFLA_MASTER] = { .type = NLA_U32 },
1884 [IFLA_CARRIER] = { .type = NLA_U8 },
1885 [IFLA_TXQLEN] = { .type = NLA_U32 },
1886 [IFLA_WEIGHT] = { .type = NLA_U32 },
1887 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1888 [IFLA_LINKMODE] = { .type = NLA_U8 },
1889 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1890 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1891 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1892 /* IFLA_IFALIAS is a string, but policy is set to NLA_BINARY to
1893 * allow 0-length string (needed to remove an alias).
1895 [IFLA_IFALIAS] = { .type = NLA_BINARY, .len = IFALIASZ - 1 },
1896 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1897 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1898 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1899 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1900 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1901 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1902 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1903 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1904 [IFLA_GSO_MAX_SEGS] = { .type = NLA_U32 },
1905 [IFLA_GSO_MAX_SIZE] = { .type = NLA_U32 },
1906 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1907 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
1908 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1909 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
1910 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
1911 [IFLA_XDP] = { .type = NLA_NESTED },
1912 [IFLA_EVENT] = { .type = NLA_U32 },
1913 [IFLA_GROUP] = { .type = NLA_U32 },
1914 [IFLA_TARGET_NETNSID] = { .type = NLA_S32 },
1915 [IFLA_CARRIER_UP_COUNT] = { .type = NLA_U32 },
1916 [IFLA_CARRIER_DOWN_COUNT] = { .type = NLA_U32 },
1917 [IFLA_MIN_MTU] = { .type = NLA_U32 },
1918 [IFLA_MAX_MTU] = { .type = NLA_U32 },
1919 [IFLA_PROP_LIST] = { .type = NLA_NESTED },
1920 [IFLA_ALT_IFNAME] = { .type = NLA_STRING,
1921 .len = ALTIFNAMSIZ - 1 },
1922 [IFLA_PERM_ADDRESS] = { .type = NLA_REJECT },
1923 [IFLA_PROTO_DOWN_REASON] = { .type = NLA_NESTED },
1924 [IFLA_NEW_IFINDEX] = NLA_POLICY_MIN(NLA_S32, 1),
1925 [IFLA_PARENT_DEV_NAME] = { .type = NLA_NUL_STRING },
1926 [IFLA_GRO_MAX_SIZE] = { .type = NLA_U32 },
1927 [IFLA_TSO_MAX_SIZE] = { .type = NLA_REJECT },
1928 [IFLA_TSO_MAX_SEGS] = { .type = NLA_REJECT },
1931 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1932 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1933 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1934 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1935 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
1938 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1939 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1940 [IFLA_VF_BROADCAST] = { .type = NLA_REJECT },
1941 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1942 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
1943 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1944 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1945 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1946 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
1947 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
1948 [IFLA_VF_STATS] = { .type = NLA_NESTED },
1949 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
1950 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1951 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1954 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1955 [IFLA_PORT_VF] = { .type = NLA_U32 },
1956 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1957 .len = PORT_PROFILE_MAX },
1958 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1959 .len = PORT_UUID_MAX },
1960 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1961 .len = PORT_UUID_MAX },
1962 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1963 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1965 /* Unused, but we need to keep it here since user space could
1966 * fill it. It's also broken with regard to NLA_BINARY use in
1967 * combination with structs.
1969 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1970 .len = sizeof(struct ifla_port_vsi) },
1973 static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
1974 [IFLA_XDP_UNSPEC] = { .strict_start_type = IFLA_XDP_EXPECTED_FD },
1975 [IFLA_XDP_FD] = { .type = NLA_S32 },
1976 [IFLA_XDP_EXPECTED_FD] = { .type = NLA_S32 },
1977 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
1978 [IFLA_XDP_FLAGS] = { .type = NLA_U32 },
1979 [IFLA_XDP_PROG_ID] = { .type = NLA_U32 },
1982 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1984 const struct rtnl_link_ops *ops = NULL;
1985 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1987 if (nla_parse_nested_deprecated(linfo, IFLA_INFO_MAX, nla, ifla_info_policy, NULL) < 0)
1990 if (linfo[IFLA_INFO_KIND]) {
1991 char kind[MODULE_NAME_LEN];
1993 nla_strscpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1994 ops = rtnl_link_ops_get(kind);
2000 static bool link_master_filtered(struct net_device *dev, int master_idx)
2002 struct net_device *master;
2007 master = netdev_master_upper_dev_get(dev);
2009 /* 0 is already used to denote IFLA_MASTER wasn't passed, therefore need
2010 * another invalid value for ifindex to denote "no master".
2012 if (master_idx == -1)
2015 if (!master || master->ifindex != master_idx)
2021 static bool link_kind_filtered(const struct net_device *dev,
2022 const struct rtnl_link_ops *kind_ops)
2024 if (kind_ops && dev->rtnl_link_ops != kind_ops)
2030 static bool link_dump_filtered(struct net_device *dev,
2032 const struct rtnl_link_ops *kind_ops)
2034 if (link_master_filtered(dev, master_idx) ||
2035 link_kind_filtered(dev, kind_ops))
2042 * rtnl_get_net_ns_capable - Get netns if sufficiently privileged.
2043 * @sk: netlink socket
2044 * @netnsid: network namespace identifier
2046 * Returns the network namespace identified by netnsid on success or an error
2047 * pointer on failure.
2049 struct net *rtnl_get_net_ns_capable(struct sock *sk, int netnsid)
2053 net = get_net_ns_by_id(sock_net(sk), netnsid);
2055 return ERR_PTR(-EINVAL);
2057 /* For now, the caller is required to have CAP_NET_ADMIN in
2058 * the user namespace owning the target net ns.
2060 if (!sk_ns_capable(sk, net->user_ns, CAP_NET_ADMIN)) {
2062 return ERR_PTR(-EACCES);
2066 EXPORT_SYMBOL_GPL(rtnl_get_net_ns_capable);
2068 static int rtnl_valid_dump_ifinfo_req(const struct nlmsghdr *nlh,
2069 bool strict_check, struct nlattr **tb,
2070 struct netlink_ext_ack *extack)
2075 struct ifinfomsg *ifm;
2077 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
2078 NL_SET_ERR_MSG(extack, "Invalid header for link dump");
2082 ifm = nlmsg_data(nlh);
2083 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
2085 NL_SET_ERR_MSG(extack, "Invalid values in header for link dump request");
2088 if (ifm->ifi_index) {
2089 NL_SET_ERR_MSG(extack, "Filter by device index not supported for link dumps");
2093 return nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb,
2094 IFLA_MAX, ifla_policy,
2098 /* A hack to preserve kernel<->userspace interface.
2099 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
2100 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
2101 * what iproute2 < v3.9.0 used.
2102 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
2103 * attribute, its netlink message is shorter than struct ifinfomsg.
2105 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2106 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2108 return nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy,
2112 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
2114 struct netlink_ext_ack *extack = cb->extack;
2115 const struct nlmsghdr *nlh = cb->nlh;
2116 struct net *net = sock_net(skb->sk);
2117 struct net *tgt_net = net;
2120 struct net_device *dev;
2121 struct hlist_head *head;
2122 struct nlattr *tb[IFLA_MAX+1];
2123 u32 ext_filter_mask = 0;
2124 const struct rtnl_link_ops *kind_ops = NULL;
2125 unsigned int flags = NLM_F_MULTI;
2131 s_idx = cb->args[1];
2133 err = rtnl_valid_dump_ifinfo_req(nlh, cb->strict_check, tb, extack);
2135 if (cb->strict_check)
2141 for (i = 0; i <= IFLA_MAX; ++i) {
2145 /* new attributes should only be added with strict checking */
2147 case IFLA_TARGET_NETNSID:
2148 netnsid = nla_get_s32(tb[i]);
2149 tgt_net = rtnl_get_net_ns_capable(skb->sk, netnsid);
2150 if (IS_ERR(tgt_net)) {
2151 NL_SET_ERR_MSG(extack, "Invalid target network namespace id");
2152 return PTR_ERR(tgt_net);
2156 ext_filter_mask = nla_get_u32(tb[i]);
2159 master_idx = nla_get_u32(tb[i]);
2162 kind_ops = linkinfo_to_kind_ops(tb[i]);
2165 if (cb->strict_check) {
2166 NL_SET_ERR_MSG(extack, "Unsupported attribute in link dump request");
2172 if (master_idx || kind_ops)
2173 flags |= NLM_F_DUMP_FILTERED;
2176 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
2178 head = &tgt_net->dev_index_head[h];
2179 hlist_for_each_entry(dev, head, index_hlist) {
2180 if (link_dump_filtered(dev, master_idx, kind_ops))
2184 err = rtnl_fill_ifinfo(skb, dev, net,
2186 NETLINK_CB(cb->skb).portid,
2187 nlh->nlmsg_seq, 0, flags,
2188 ext_filter_mask, 0, NULL, 0,
2189 netnsid, GFP_KERNEL);
2192 if (likely(skb->len))
2206 cb->seq = tgt_net->dev_base_seq;
2207 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
2214 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
2215 struct netlink_ext_ack *exterr)
2217 return nla_parse_deprecated(tb, IFLA_MAX, head, len, ifla_policy,
2220 EXPORT_SYMBOL(rtnl_nla_parse_ifla);
2222 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
2225 /* Examine the link attributes and figure out which
2226 * network namespace we are talking about.
2228 if (tb[IFLA_NET_NS_PID])
2229 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
2230 else if (tb[IFLA_NET_NS_FD])
2231 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
2233 net = get_net(src_net);
2236 EXPORT_SYMBOL(rtnl_link_get_net);
2238 /* Figure out which network namespace we are talking about by
2239 * examining the link attributes in the following order:
2241 * 1. IFLA_NET_NS_PID
2243 * 3. IFLA_TARGET_NETNSID
2245 static struct net *rtnl_link_get_net_by_nlattr(struct net *src_net,
2246 struct nlattr *tb[])
2250 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD])
2251 return rtnl_link_get_net(src_net, tb);
2253 if (!tb[IFLA_TARGET_NETNSID])
2254 return get_net(src_net);
2256 net = get_net_ns_by_id(src_net, nla_get_u32(tb[IFLA_TARGET_NETNSID]));
2258 return ERR_PTR(-EINVAL);
2263 static struct net *rtnl_link_get_net_capable(const struct sk_buff *skb,
2264 struct net *src_net,
2265 struct nlattr *tb[], int cap)
2269 net = rtnl_link_get_net_by_nlattr(src_net, tb);
2273 if (!netlink_ns_capable(skb, net->user_ns, cap)) {
2275 return ERR_PTR(-EPERM);
2281 /* Verify that rtnetlink requests do not pass additional properties
2282 * potentially referring to different network namespaces.
2284 static int rtnl_ensure_unique_netns(struct nlattr *tb[],
2285 struct netlink_ext_ack *extack,
2289 if (netns_id_only) {
2290 if (!tb[IFLA_NET_NS_PID] && !tb[IFLA_NET_NS_FD])
2293 NL_SET_ERR_MSG(extack, "specified netns attribute not supported");
2297 if (tb[IFLA_TARGET_NETNSID] && (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]))
2300 if (tb[IFLA_NET_NS_PID] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_FD]))
2303 if (tb[IFLA_NET_NS_FD] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_PID]))
2309 NL_SET_ERR_MSG(extack, "multiple netns identifying attributes specified");
2313 static int rtnl_set_vf_rate(struct net_device *dev, int vf, int min_tx_rate,
2316 const struct net_device_ops *ops = dev->netdev_ops;
2318 if (!ops->ndo_set_vf_rate)
2320 if (max_tx_rate && max_tx_rate < min_tx_rate)
2323 return ops->ndo_set_vf_rate(dev, vf, min_tx_rate, max_tx_rate);
2326 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[],
2327 struct netlink_ext_ack *extack)
2330 if (tb[IFLA_ADDRESS] &&
2331 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
2334 if (tb[IFLA_BROADCAST] &&
2335 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
2339 if (tb[IFLA_AF_SPEC]) {
2343 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2344 const struct rtnl_af_ops *af_ops;
2346 af_ops = rtnl_af_lookup(nla_type(af));
2348 return -EAFNOSUPPORT;
2350 if (!af_ops->set_link_af)
2353 if (af_ops->validate_link_af) {
2354 err = af_ops->validate_link_af(dev, af, extack);
2364 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
2367 const struct net_device_ops *ops = dev->netdev_ops;
2369 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
2372 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
2374 if (dev->type != ARPHRD_INFINIBAND)
2377 return handle_infiniband_guid(dev, ivt, guid_type);
2380 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
2382 const struct net_device_ops *ops = dev->netdev_ops;
2385 if (tb[IFLA_VF_MAC]) {
2386 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
2388 if (ivm->vf >= INT_MAX)
2391 if (ops->ndo_set_vf_mac)
2392 err = ops->ndo_set_vf_mac(dev, ivm->vf,
2398 if (tb[IFLA_VF_VLAN]) {
2399 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
2401 if (ivv->vf >= INT_MAX)
2404 if (ops->ndo_set_vf_vlan)
2405 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
2407 htons(ETH_P_8021Q));
2412 if (tb[IFLA_VF_VLAN_LIST]) {
2413 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
2414 struct nlattr *attr;
2418 if (!ops->ndo_set_vf_vlan)
2421 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
2422 if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
2423 nla_len(attr) < NLA_HDRLEN) {
2426 if (len >= MAX_VLAN_LIST_LEN)
2428 ivvl[len] = nla_data(attr);
2435 if (ivvl[0]->vf >= INT_MAX)
2437 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
2438 ivvl[0]->qos, ivvl[0]->vlan_proto);
2443 if (tb[IFLA_VF_TX_RATE]) {
2444 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
2445 struct ifla_vf_info ivf;
2447 if (ivt->vf >= INT_MAX)
2450 if (ops->ndo_get_vf_config)
2451 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
2455 err = rtnl_set_vf_rate(dev, ivt->vf,
2456 ivf.min_tx_rate, ivt->rate);
2461 if (tb[IFLA_VF_RATE]) {
2462 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
2464 if (ivt->vf >= INT_MAX)
2467 err = rtnl_set_vf_rate(dev, ivt->vf,
2468 ivt->min_tx_rate, ivt->max_tx_rate);
2473 if (tb[IFLA_VF_SPOOFCHK]) {
2474 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
2476 if (ivs->vf >= INT_MAX)
2479 if (ops->ndo_set_vf_spoofchk)
2480 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
2486 if (tb[IFLA_VF_LINK_STATE]) {
2487 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
2489 if (ivl->vf >= INT_MAX)
2492 if (ops->ndo_set_vf_link_state)
2493 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
2499 if (tb[IFLA_VF_RSS_QUERY_EN]) {
2500 struct ifla_vf_rss_query_en *ivrssq_en;
2503 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
2504 if (ivrssq_en->vf >= INT_MAX)
2506 if (ops->ndo_set_vf_rss_query_en)
2507 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
2508 ivrssq_en->setting);
2513 if (tb[IFLA_VF_TRUST]) {
2514 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
2516 if (ivt->vf >= INT_MAX)
2519 if (ops->ndo_set_vf_trust)
2520 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
2525 if (tb[IFLA_VF_IB_NODE_GUID]) {
2526 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
2528 if (ivt->vf >= INT_MAX)
2530 if (!ops->ndo_set_vf_guid)
2532 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
2535 if (tb[IFLA_VF_IB_PORT_GUID]) {
2536 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
2538 if (ivt->vf >= INT_MAX)
2540 if (!ops->ndo_set_vf_guid)
2543 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
2549 static int do_set_master(struct net_device *dev, int ifindex,
2550 struct netlink_ext_ack *extack)
2552 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
2553 const struct net_device_ops *ops;
2557 if (upper_dev->ifindex == ifindex)
2559 ops = upper_dev->netdev_ops;
2560 if (ops->ndo_del_slave) {
2561 err = ops->ndo_del_slave(upper_dev, dev);
2570 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
2573 ops = upper_dev->netdev_ops;
2574 if (ops->ndo_add_slave) {
2575 err = ops->ndo_add_slave(upper_dev, dev, extack);
2585 static const struct nla_policy ifla_proto_down_reason_policy[IFLA_PROTO_DOWN_REASON_VALUE + 1] = {
2586 [IFLA_PROTO_DOWN_REASON_MASK] = { .type = NLA_U32 },
2587 [IFLA_PROTO_DOWN_REASON_VALUE] = { .type = NLA_U32 },
2590 static int do_set_proto_down(struct net_device *dev,
2591 struct nlattr *nl_proto_down,
2592 struct nlattr *nl_proto_down_reason,
2593 struct netlink_ext_ack *extack)
2595 struct nlattr *pdreason[IFLA_PROTO_DOWN_REASON_MAX + 1];
2596 unsigned long mask = 0;
2601 if (!(dev->priv_flags & IFF_CHANGE_PROTO_DOWN)) {
2602 NL_SET_ERR_MSG(extack, "Protodown not supported by device");
2606 if (nl_proto_down_reason) {
2607 err = nla_parse_nested_deprecated(pdreason,
2608 IFLA_PROTO_DOWN_REASON_MAX,
2609 nl_proto_down_reason,
2610 ifla_proto_down_reason_policy,
2615 if (!pdreason[IFLA_PROTO_DOWN_REASON_VALUE]) {
2616 NL_SET_ERR_MSG(extack, "Invalid protodown reason value");
2620 value = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_VALUE]);
2622 if (pdreason[IFLA_PROTO_DOWN_REASON_MASK])
2623 mask = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_MASK]);
2625 dev_change_proto_down_reason(dev, mask, value);
2628 if (nl_proto_down) {
2629 proto_down = nla_get_u8(nl_proto_down);
2631 /* Don't turn off protodown if there are active reasons */
2632 if (!proto_down && dev->proto_down_reason) {
2633 NL_SET_ERR_MSG(extack, "Cannot clear protodown, active reasons");
2636 err = dev_change_proto_down(dev,
2645 #define DO_SETLINK_MODIFIED 0x01
2646 /* notify flag means notify + modified. */
2647 #define DO_SETLINK_NOTIFY 0x03
2648 static int do_setlink(const struct sk_buff *skb,
2649 struct net_device *dev, struct ifinfomsg *ifm,
2650 struct netlink_ext_ack *extack,
2651 struct nlattr **tb, int status)
2653 const struct net_device_ops *ops = dev->netdev_ops;
2654 char ifname[IFNAMSIZ];
2657 err = validate_linkmsg(dev, tb, extack);
2661 if (tb[IFLA_IFNAME])
2662 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2666 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD] || tb[IFLA_TARGET_NETNSID]) {
2667 const char *pat = ifname[0] ? ifname : NULL;
2671 net = rtnl_link_get_net_capable(skb, dev_net(dev),
2678 if (tb[IFLA_NEW_IFINDEX])
2679 new_ifindex = nla_get_s32(tb[IFLA_NEW_IFINDEX]);
2683 err = __dev_change_net_namespace(dev, net, pat, new_ifindex);
2687 status |= DO_SETLINK_MODIFIED;
2691 struct rtnl_link_ifmap *u_map;
2694 if (!ops->ndo_set_config) {
2699 if (!netif_device_present(dev)) {
2704 u_map = nla_data(tb[IFLA_MAP]);
2705 k_map.mem_start = (unsigned long) u_map->mem_start;
2706 k_map.mem_end = (unsigned long) u_map->mem_end;
2707 k_map.base_addr = (unsigned short) u_map->base_addr;
2708 k_map.irq = (unsigned char) u_map->irq;
2709 k_map.dma = (unsigned char) u_map->dma;
2710 k_map.port = (unsigned char) u_map->port;
2712 err = ops->ndo_set_config(dev, &k_map);
2716 status |= DO_SETLINK_NOTIFY;
2719 if (tb[IFLA_ADDRESS]) {
2720 struct sockaddr *sa;
2723 len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len,
2725 sa = kmalloc(len, GFP_KERNEL);
2730 sa->sa_family = dev->type;
2731 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
2733 err = dev_set_mac_address_user(dev, sa, extack);
2737 status |= DO_SETLINK_MODIFIED;
2741 err = dev_set_mtu_ext(dev, nla_get_u32(tb[IFLA_MTU]), extack);
2744 status |= DO_SETLINK_MODIFIED;
2747 if (tb[IFLA_GROUP]) {
2748 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2749 status |= DO_SETLINK_NOTIFY;
2753 * Interface selected by interface index but interface
2754 * name provided implies that a name change has been
2757 if (ifm->ifi_index > 0 && ifname[0]) {
2758 err = dev_change_name(dev, ifname);
2761 status |= DO_SETLINK_MODIFIED;
2764 if (tb[IFLA_IFALIAS]) {
2765 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2766 nla_len(tb[IFLA_IFALIAS]));
2769 status |= DO_SETLINK_NOTIFY;
2772 if (tb[IFLA_BROADCAST]) {
2773 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
2774 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
2777 if (ifm->ifi_flags || ifm->ifi_change) {
2778 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
2784 if (tb[IFLA_MASTER]) {
2785 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
2788 status |= DO_SETLINK_MODIFIED;
2791 if (tb[IFLA_CARRIER]) {
2792 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2795 status |= DO_SETLINK_MODIFIED;
2798 if (tb[IFLA_TXQLEN]) {
2799 unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]);
2801 err = dev_change_tx_queue_len(dev, value);
2804 status |= DO_SETLINK_MODIFIED;
2807 if (tb[IFLA_GSO_MAX_SIZE]) {
2808 u32 max_size = nla_get_u32(tb[IFLA_GSO_MAX_SIZE]);
2810 if (max_size > dev->tso_max_size) {
2815 if (dev->gso_max_size ^ max_size) {
2816 netif_set_gso_max_size(dev, max_size);
2817 status |= DO_SETLINK_MODIFIED;
2821 if (tb[IFLA_GSO_MAX_SEGS]) {
2822 u32 max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
2824 if (max_segs > GSO_MAX_SEGS || max_segs > dev->tso_max_segs) {
2829 if (dev->gso_max_segs ^ max_segs) {
2830 netif_set_gso_max_segs(dev, max_segs);
2831 status |= DO_SETLINK_MODIFIED;
2835 if (tb[IFLA_GRO_MAX_SIZE]) {
2836 u32 gro_max_size = nla_get_u32(tb[IFLA_GRO_MAX_SIZE]);
2838 if (dev->gro_max_size ^ gro_max_size) {
2839 netif_set_gro_max_size(dev, gro_max_size);
2840 status |= DO_SETLINK_MODIFIED;
2844 if (tb[IFLA_OPERSTATE])
2845 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2847 if (tb[IFLA_LINKMODE]) {
2848 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2850 write_lock(&dev_base_lock);
2851 if (dev->link_mode ^ value)
2852 status |= DO_SETLINK_NOTIFY;
2853 dev->link_mode = value;
2854 write_unlock(&dev_base_lock);
2857 if (tb[IFLA_VFINFO_LIST]) {
2858 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
2859 struct nlattr *attr;
2862 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
2863 if (nla_type(attr) != IFLA_VF_INFO ||
2864 nla_len(attr) < NLA_HDRLEN) {
2868 err = nla_parse_nested_deprecated(vfinfo, IFLA_VF_MAX,
2874 err = do_setvfinfo(dev, vfinfo);
2877 status |= DO_SETLINK_NOTIFY;
2882 if (tb[IFLA_VF_PORTS]) {
2883 struct nlattr *port[IFLA_PORT_MAX+1];
2884 struct nlattr *attr;
2889 if (!ops->ndo_set_vf_port)
2892 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
2893 if (nla_type(attr) != IFLA_VF_PORT ||
2894 nla_len(attr) < NLA_HDRLEN) {
2898 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
2904 if (!port[IFLA_PORT_VF]) {
2908 vf = nla_get_u32(port[IFLA_PORT_VF]);
2909 err = ops->ndo_set_vf_port(dev, vf, port);
2912 status |= DO_SETLINK_NOTIFY;
2917 if (tb[IFLA_PORT_SELF]) {
2918 struct nlattr *port[IFLA_PORT_MAX+1];
2920 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
2922 ifla_port_policy, NULL);
2927 if (ops->ndo_set_vf_port)
2928 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2931 status |= DO_SETLINK_NOTIFY;
2934 if (tb[IFLA_AF_SPEC]) {
2938 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2939 const struct rtnl_af_ops *af_ops;
2941 BUG_ON(!(af_ops = rtnl_af_lookup(nla_type(af))));
2943 err = af_ops->set_link_af(dev, af, extack);
2947 status |= DO_SETLINK_NOTIFY;
2952 if (tb[IFLA_PROTO_DOWN] || tb[IFLA_PROTO_DOWN_REASON]) {
2953 err = do_set_proto_down(dev, tb[IFLA_PROTO_DOWN],
2954 tb[IFLA_PROTO_DOWN_REASON], extack);
2957 status |= DO_SETLINK_NOTIFY;
2961 struct nlattr *xdp[IFLA_XDP_MAX + 1];
2964 err = nla_parse_nested_deprecated(xdp, IFLA_XDP_MAX,
2966 ifla_xdp_policy, NULL);
2970 if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) {
2975 if (xdp[IFLA_XDP_FLAGS]) {
2976 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
2977 if (xdp_flags & ~XDP_FLAGS_MASK) {
2981 if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) {
2987 if (xdp[IFLA_XDP_FD]) {
2988 int expected_fd = -1;
2990 if (xdp_flags & XDP_FLAGS_REPLACE) {
2991 if (!xdp[IFLA_XDP_EXPECTED_FD]) {
2996 nla_get_s32(xdp[IFLA_XDP_EXPECTED_FD]);
2999 err = dev_change_xdp_fd(dev, extack,
3000 nla_get_s32(xdp[IFLA_XDP_FD]),
3005 status |= DO_SETLINK_NOTIFY;
3010 if (status & DO_SETLINK_MODIFIED) {
3011 if ((status & DO_SETLINK_NOTIFY) == DO_SETLINK_NOTIFY)
3012 netdev_state_change(dev);
3015 net_warn_ratelimited("A link change request failed with some changes committed already. Interface %s may have been left with an inconsistent configuration, please check.\n",
3022 static struct net_device *rtnl_dev_get(struct net *net,
3023 struct nlattr *tb[])
3025 char ifname[ALTIFNAMSIZ];
3027 if (tb[IFLA_IFNAME])
3028 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3029 else if (tb[IFLA_ALT_IFNAME])
3030 nla_strscpy(ifname, tb[IFLA_ALT_IFNAME], ALTIFNAMSIZ);
3034 return __dev_get_by_name(net, ifname);
3037 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3038 struct netlink_ext_ack *extack)
3040 struct net *net = sock_net(skb->sk);
3041 struct ifinfomsg *ifm;
3042 struct net_device *dev;
3044 struct nlattr *tb[IFLA_MAX+1];
3046 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3047 ifla_policy, extack);
3051 err = rtnl_ensure_unique_netns(tb, extack, false);
3056 ifm = nlmsg_data(nlh);
3057 if (ifm->ifi_index > 0)
3058 dev = __dev_get_by_index(net, ifm->ifi_index);
3059 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3060 dev = rtnl_dev_get(net, tb);
3069 err = do_setlink(skb, dev, ifm, extack, tb, 0);
3074 static int rtnl_group_dellink(const struct net *net, int group)
3076 struct net_device *dev, *aux;
3077 LIST_HEAD(list_kill);
3083 for_each_netdev(net, dev) {
3084 if (dev->group == group) {
3085 const struct rtnl_link_ops *ops;
3088 ops = dev->rtnl_link_ops;
3089 if (!ops || !ops->dellink)
3097 for_each_netdev_safe(net, dev, aux) {
3098 if (dev->group == group) {
3099 const struct rtnl_link_ops *ops;
3101 ops = dev->rtnl_link_ops;
3102 ops->dellink(dev, &list_kill);
3105 unregister_netdevice_many(&list_kill);
3110 int rtnl_delete_link(struct net_device *dev)
3112 const struct rtnl_link_ops *ops;
3113 LIST_HEAD(list_kill);
3115 ops = dev->rtnl_link_ops;
3116 if (!ops || !ops->dellink)
3119 ops->dellink(dev, &list_kill);
3120 unregister_netdevice_many(&list_kill);
3124 EXPORT_SYMBOL_GPL(rtnl_delete_link);
3126 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
3127 struct netlink_ext_ack *extack)
3129 struct net *net = sock_net(skb->sk);
3130 struct net *tgt_net = net;
3131 struct net_device *dev = NULL;
3132 struct ifinfomsg *ifm;
3133 struct nlattr *tb[IFLA_MAX+1];
3137 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3138 ifla_policy, extack);
3142 err = rtnl_ensure_unique_netns(tb, extack, true);
3146 if (tb[IFLA_TARGET_NETNSID]) {
3147 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
3148 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
3149 if (IS_ERR(tgt_net))
3150 return PTR_ERR(tgt_net);
3154 ifm = nlmsg_data(nlh);
3155 if (ifm->ifi_index > 0)
3156 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
3157 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3158 dev = rtnl_dev_get(net, tb);
3159 else if (tb[IFLA_GROUP])
3160 err = rtnl_group_dellink(tgt_net, nla_get_u32(tb[IFLA_GROUP]));
3165 if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME] || ifm->ifi_index > 0)
3171 err = rtnl_delete_link(dev);
3180 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
3182 unsigned int old_flags;
3185 old_flags = dev->flags;
3186 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
3187 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
3193 if (dev->rtnl_link_state == RTNL_LINK_INITIALIZED) {
3194 __dev_notify_flags(dev, old_flags, (old_flags ^ dev->flags));
3196 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3197 __dev_notify_flags(dev, old_flags, ~0U);
3201 EXPORT_SYMBOL(rtnl_configure_link);
3203 struct net_device *rtnl_create_link(struct net *net, const char *ifname,
3204 unsigned char name_assign_type,
3205 const struct rtnl_link_ops *ops,
3206 struct nlattr *tb[],
3207 struct netlink_ext_ack *extack)
3209 struct net_device *dev;
3210 unsigned int num_tx_queues = 1;
3211 unsigned int num_rx_queues = 1;
3213 if (tb[IFLA_NUM_TX_QUEUES])
3214 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
3215 else if (ops->get_num_tx_queues)
3216 num_tx_queues = ops->get_num_tx_queues();
3218 if (tb[IFLA_NUM_RX_QUEUES])
3219 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
3220 else if (ops->get_num_rx_queues)
3221 num_rx_queues = ops->get_num_rx_queues();
3223 if (num_tx_queues < 1 || num_tx_queues > 4096) {
3224 NL_SET_ERR_MSG(extack, "Invalid number of transmit queues");
3225 return ERR_PTR(-EINVAL);
3228 if (num_rx_queues < 1 || num_rx_queues > 4096) {
3229 NL_SET_ERR_MSG(extack, "Invalid number of receive queues");
3230 return ERR_PTR(-EINVAL);
3234 dev = ops->alloc(tb, ifname, name_assign_type,
3235 num_tx_queues, num_rx_queues);
3239 dev = alloc_netdev_mqs(ops->priv_size, ifname,
3240 name_assign_type, ops->setup,
3241 num_tx_queues, num_rx_queues);
3245 return ERR_PTR(-ENOMEM);
3247 dev_net_set(dev, net);
3248 dev->rtnl_link_ops = ops;
3249 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
3252 u32 mtu = nla_get_u32(tb[IFLA_MTU]);
3255 err = dev_validate_mtu(dev, mtu, extack);
3258 return ERR_PTR(err);
3262 if (tb[IFLA_ADDRESS]) {
3263 __dev_addr_set(dev, nla_data(tb[IFLA_ADDRESS]),
3264 nla_len(tb[IFLA_ADDRESS]));
3265 dev->addr_assign_type = NET_ADDR_SET;
3267 if (tb[IFLA_BROADCAST])
3268 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
3269 nla_len(tb[IFLA_BROADCAST]));
3270 if (tb[IFLA_TXQLEN])
3271 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
3272 if (tb[IFLA_OPERSTATE])
3273 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
3274 if (tb[IFLA_LINKMODE])
3275 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
3277 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
3278 if (tb[IFLA_GSO_MAX_SIZE])
3279 netif_set_gso_max_size(dev, nla_get_u32(tb[IFLA_GSO_MAX_SIZE]));
3280 if (tb[IFLA_GSO_MAX_SEGS])
3281 netif_set_gso_max_segs(dev, nla_get_u32(tb[IFLA_GSO_MAX_SEGS]));
3282 if (tb[IFLA_GRO_MAX_SIZE])
3283 netif_set_gro_max_size(dev, nla_get_u32(tb[IFLA_GRO_MAX_SIZE]));
3287 EXPORT_SYMBOL(rtnl_create_link);
3289 static int rtnl_group_changelink(const struct sk_buff *skb,
3290 struct net *net, int group,
3291 struct ifinfomsg *ifm,
3292 struct netlink_ext_ack *extack,
3295 struct net_device *dev, *aux;
3298 for_each_netdev_safe(net, dev, aux) {
3299 if (dev->group == group) {
3300 err = do_setlink(skb, dev, ifm, extack, tb, 0);
3309 static int rtnl_newlink_create(struct sk_buff *skb, struct ifinfomsg *ifm,
3310 const struct rtnl_link_ops *ops,
3311 struct nlattr **tb, struct nlattr **data,
3312 struct netlink_ext_ack *extack)
3314 unsigned char name_assign_type = NET_NAME_USER;
3315 struct net *net = sock_net(skb->sk);
3316 struct net *dest_net, *link_net;
3317 struct net_device *dev;
3318 char ifname[IFNAMSIZ];
3321 if (!ops->alloc && !ops->setup)
3324 if (tb[IFLA_IFNAME]) {
3325 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3327 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
3328 name_assign_type = NET_NAME_ENUM;
3331 dest_net = rtnl_link_get_net_capable(skb, net, tb, CAP_NET_ADMIN);
3332 if (IS_ERR(dest_net))
3333 return PTR_ERR(dest_net);
3335 if (tb[IFLA_LINK_NETNSID]) {
3336 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
3338 link_net = get_net_ns_by_id(dest_net, id);
3340 NL_SET_ERR_MSG(extack, "Unknown network namespace id");
3345 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
3351 dev = rtnl_create_link(link_net ? : dest_net, ifname,
3352 name_assign_type, ops, tb, extack);
3358 dev->ifindex = ifm->ifi_index;
3361 err = ops->newlink(link_net ? : net, dev, tb, data, extack);
3363 err = register_netdevice(dev);
3369 err = rtnl_configure_link(dev, ifm);
3371 goto out_unregister;
3373 err = dev_change_net_namespace(dev, dest_net, ifname);
3375 goto out_unregister;
3377 if (tb[IFLA_MASTER]) {
3378 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
3380 goto out_unregister;
3389 LIST_HEAD(list_kill);
3391 ops->dellink(dev, &list_kill);
3392 unregister_netdevice_many(&list_kill);
3394 unregister_netdevice(dev);
3399 struct rtnl_newlink_tbs {
3400 struct nlattr *tb[IFLA_MAX + 1];
3401 struct nlattr *attr[RTNL_MAX_TYPE + 1];
3402 struct nlattr *slave_attr[RTNL_SLAVE_MAX_TYPE + 1];
3405 static int __rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3406 struct rtnl_newlink_tbs *tbs,
3407 struct netlink_ext_ack *extack)
3409 struct nlattr *linkinfo[IFLA_INFO_MAX + 1];
3410 struct nlattr ** const tb = tbs->tb;
3411 const struct rtnl_link_ops *m_ops;
3412 struct net_device *master_dev;
3413 struct net *net = sock_net(skb->sk);
3414 const struct rtnl_link_ops *ops;
3415 struct nlattr **slave_data;
3416 char kind[MODULE_NAME_LEN];
3417 struct net_device *dev;
3418 struct ifinfomsg *ifm;
3419 struct nlattr **data;
3420 bool link_specified;
3423 #ifdef CONFIG_MODULES
3426 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3427 ifla_policy, extack);
3431 err = rtnl_ensure_unique_netns(tb, extack, false);
3435 ifm = nlmsg_data(nlh);
3436 if (ifm->ifi_index > 0) {
3437 link_specified = true;
3438 dev = __dev_get_by_index(net, ifm->ifi_index);
3439 } else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) {
3440 link_specified = true;
3441 dev = rtnl_dev_get(net, tb);
3443 link_specified = false;
3450 master_dev = netdev_master_upper_dev_get(dev);
3452 m_ops = master_dev->rtnl_link_ops;
3455 err = validate_linkmsg(dev, tb, extack);
3459 if (tb[IFLA_LINKINFO]) {
3460 err = nla_parse_nested_deprecated(linkinfo, IFLA_INFO_MAX,
3462 ifla_info_policy, NULL);
3466 memset(linkinfo, 0, sizeof(linkinfo));
3468 if (linkinfo[IFLA_INFO_KIND]) {
3469 nla_strscpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
3470 ops = rtnl_link_ops_get(kind);
3478 if (ops->maxtype > RTNL_MAX_TYPE)
3481 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
3482 err = nla_parse_nested_deprecated(tbs->attr, ops->maxtype,
3483 linkinfo[IFLA_INFO_DATA],
3484 ops->policy, extack);
3489 if (ops->validate) {
3490 err = ops->validate(tb, data, extack);
3498 if (m_ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE)
3501 if (m_ops->slave_maxtype &&
3502 linkinfo[IFLA_INFO_SLAVE_DATA]) {
3503 err = nla_parse_nested_deprecated(tbs->slave_attr,
3504 m_ops->slave_maxtype,
3505 linkinfo[IFLA_INFO_SLAVE_DATA],
3506 m_ops->slave_policy,
3510 slave_data = tbs->slave_attr;
3517 if (nlh->nlmsg_flags & NLM_F_EXCL)
3519 if (nlh->nlmsg_flags & NLM_F_REPLACE)
3522 if (linkinfo[IFLA_INFO_DATA]) {
3523 if (!ops || ops != dev->rtnl_link_ops ||
3527 err = ops->changelink(dev, tb, data, extack);
3530 status |= DO_SETLINK_NOTIFY;
3533 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
3534 if (!m_ops || !m_ops->slave_changelink)
3537 err = m_ops->slave_changelink(master_dev, dev, tb,
3538 slave_data, extack);
3541 status |= DO_SETLINK_NOTIFY;
3544 return do_setlink(skb, dev, ifm, extack, tb, status);
3547 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
3548 /* No dev found and NLM_F_CREATE not set. Requested dev does not exist,
3549 * or it's for a group
3554 return rtnl_group_changelink(skb, net,
3555 nla_get_u32(tb[IFLA_GROUP]),
3560 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
3564 #ifdef CONFIG_MODULES
3567 request_module("rtnl-link-%s", kind);
3569 ops = rtnl_link_ops_get(kind);
3574 NL_SET_ERR_MSG(extack, "Unknown device type");
3578 return rtnl_newlink_create(skb, ifm, ops, tb, data, extack);
3581 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3582 struct netlink_ext_ack *extack)
3584 struct rtnl_newlink_tbs *tbs;
3587 tbs = kmalloc(sizeof(*tbs), GFP_KERNEL);
3591 ret = __rtnl_newlink(skb, nlh, tbs, extack);
3596 static int rtnl_valid_getlink_req(struct sk_buff *skb,
3597 const struct nlmsghdr *nlh,
3599 struct netlink_ext_ack *extack)
3601 struct ifinfomsg *ifm;
3604 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
3605 NL_SET_ERR_MSG(extack, "Invalid header for get link");
3609 if (!netlink_strict_get_check(skb))
3610 return nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3611 ifla_policy, extack);
3613 ifm = nlmsg_data(nlh);
3614 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
3616 NL_SET_ERR_MSG(extack, "Invalid values in header for get link request");
3620 err = nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, IFLA_MAX,
3621 ifla_policy, extack);
3625 for (i = 0; i <= IFLA_MAX; i++) {
3631 case IFLA_ALT_IFNAME:
3633 case IFLA_TARGET_NETNSID:
3636 NL_SET_ERR_MSG(extack, "Unsupported attribute in get link request");
3644 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3645 struct netlink_ext_ack *extack)
3647 struct net *net = sock_net(skb->sk);
3648 struct net *tgt_net = net;
3649 struct ifinfomsg *ifm;
3650 struct nlattr *tb[IFLA_MAX+1];
3651 struct net_device *dev = NULL;
3652 struct sk_buff *nskb;
3655 u32 ext_filter_mask = 0;
3657 err = rtnl_valid_getlink_req(skb, nlh, tb, extack);
3661 err = rtnl_ensure_unique_netns(tb, extack, true);
3665 if (tb[IFLA_TARGET_NETNSID]) {
3666 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
3667 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
3668 if (IS_ERR(tgt_net))
3669 return PTR_ERR(tgt_net);
3672 if (tb[IFLA_EXT_MASK])
3673 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3676 ifm = nlmsg_data(nlh);
3677 if (ifm->ifi_index > 0)
3678 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
3679 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3680 dev = rtnl_dev_get(tgt_net, tb);
3689 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
3693 err = rtnl_fill_ifinfo(nskb, dev, net,
3694 RTM_NEWLINK, NETLINK_CB(skb).portid,
3695 nlh->nlmsg_seq, 0, 0, ext_filter_mask,
3696 0, NULL, 0, netnsid, GFP_KERNEL);
3698 /* -EMSGSIZE implies BUG in if_nlmsg_size */
3699 WARN_ON(err == -EMSGSIZE);
3702 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
3710 static int rtnl_alt_ifname(int cmd, struct net_device *dev, struct nlattr *attr,
3711 bool *changed, struct netlink_ext_ack *extack)
3717 err = nla_validate(attr, attr->nla_len, IFLA_MAX, ifla_policy, extack);
3721 if (cmd == RTM_NEWLINKPROP) {
3722 size = rtnl_prop_list_size(dev);
3723 size += nla_total_size(ALTIFNAMSIZ);
3724 if (size >= U16_MAX) {
3725 NL_SET_ERR_MSG(extack,
3726 "effective property list too long");
3731 alt_ifname = nla_strdup(attr, GFP_KERNEL_ACCOUNT);
3735 if (cmd == RTM_NEWLINKPROP) {
3736 err = netdev_name_node_alt_create(dev, alt_ifname);
3739 } else if (cmd == RTM_DELLINKPROP) {
3740 err = netdev_name_node_alt_destroy(dev, alt_ifname);
3752 static int rtnl_linkprop(int cmd, struct sk_buff *skb, struct nlmsghdr *nlh,
3753 struct netlink_ext_ack *extack)
3755 struct net *net = sock_net(skb->sk);
3756 struct nlattr *tb[IFLA_MAX + 1];
3757 struct net_device *dev;
3758 struct ifinfomsg *ifm;
3759 bool changed = false;
3760 struct nlattr *attr;
3763 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
3767 err = rtnl_ensure_unique_netns(tb, extack, true);
3771 ifm = nlmsg_data(nlh);
3772 if (ifm->ifi_index > 0)
3773 dev = __dev_get_by_index(net, ifm->ifi_index);
3774 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3775 dev = rtnl_dev_get(net, tb);
3782 if (!tb[IFLA_PROP_LIST])
3785 nla_for_each_nested(attr, tb[IFLA_PROP_LIST], rem) {
3786 switch (nla_type(attr)) {
3787 case IFLA_ALT_IFNAME:
3788 err = rtnl_alt_ifname(cmd, dev, attr, &changed, extack);
3796 netdev_state_change(dev);
3800 static int rtnl_newlinkprop(struct sk_buff *skb, struct nlmsghdr *nlh,
3801 struct netlink_ext_ack *extack)
3803 return rtnl_linkprop(RTM_NEWLINKPROP, skb, nlh, extack);
3806 static int rtnl_dellinkprop(struct sk_buff *skb, struct nlmsghdr *nlh,
3807 struct netlink_ext_ack *extack)
3809 return rtnl_linkprop(RTM_DELLINKPROP, skb, nlh, extack);
3812 static u32 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
3814 struct net *net = sock_net(skb->sk);
3815 size_t min_ifinfo_dump_size = 0;
3816 struct nlattr *tb[IFLA_MAX+1];
3817 u32 ext_filter_mask = 0;
3818 struct net_device *dev;
3821 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
3822 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
3823 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
3825 if (nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
3826 if (tb[IFLA_EXT_MASK])
3827 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3830 if (!ext_filter_mask)
3831 return NLMSG_GOODSIZE;
3833 * traverse the list of net devices and compute the minimum
3834 * buffer size based upon the filter mask.
3837 for_each_netdev_rcu(net, dev) {
3838 min_ifinfo_dump_size = max(min_ifinfo_dump_size,
3839 if_nlmsg_size(dev, ext_filter_mask));
3843 return nlmsg_total_size(min_ifinfo_dump_size);
3846 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
3849 int s_idx = cb->family;
3850 int type = cb->nlh->nlmsg_type - RTM_BASE;
3856 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
3857 struct rtnl_link __rcu **tab;
3858 struct rtnl_link *link;
3859 rtnl_dumpit_func dumpit;
3861 if (idx < s_idx || idx == PF_PACKET)
3864 if (type < 0 || type >= RTM_NR_MSGTYPES)
3867 tab = rcu_dereference_rtnl(rtnl_msg_handlers[idx]);
3871 link = rcu_dereference_rtnl(tab[type]);
3875 dumpit = link->dumpit;
3880 memset(&cb->args[0], 0, sizeof(cb->args));
3884 ret = dumpit(skb, cb);
3890 return skb->len ? : ret;
3893 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
3894 unsigned int change,
3895 u32 event, gfp_t flags, int *new_nsid,
3898 struct net *net = dev_net(dev);
3899 struct sk_buff *skb;
3902 skb = nlmsg_new(if_nlmsg_size(dev, 0), flags);
3906 err = rtnl_fill_ifinfo(skb, dev, dev_net(dev),
3907 type, 0, 0, change, 0, 0, event,
3908 new_nsid, new_ifindex, -1, flags);
3910 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
3911 WARN_ON(err == -EMSGSIZE);
3918 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
3922 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
3924 struct net *net = dev_net(dev);
3926 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
3929 static void rtmsg_ifinfo_event(int type, struct net_device *dev,
3930 unsigned int change, u32 event,
3931 gfp_t flags, int *new_nsid, int new_ifindex)
3933 struct sk_buff *skb;
3935 if (dev->reg_state != NETREG_REGISTERED)
3938 skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags, new_nsid,
3941 rtmsg_ifinfo_send(skb, dev, flags);
3944 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
3947 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
3951 void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change,
3952 gfp_t flags, int *new_nsid, int new_ifindex)
3954 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
3955 new_nsid, new_ifindex);
3958 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
3959 struct net_device *dev,
3960 u8 *addr, u16 vid, u32 pid, u32 seq,
3961 int type, unsigned int flags,
3962 int nlflags, u16 ndm_state)
3964 struct nlmsghdr *nlh;
3967 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
3971 ndm = nlmsg_data(nlh);
3972 ndm->ndm_family = AF_BRIDGE;
3975 ndm->ndm_flags = flags;
3977 ndm->ndm_ifindex = dev->ifindex;
3978 ndm->ndm_state = ndm_state;
3980 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
3981 goto nla_put_failure;
3983 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
3984 goto nla_put_failure;
3986 nlmsg_end(skb, nlh);
3990 nlmsg_cancel(skb, nlh);
3994 static inline size_t rtnl_fdb_nlmsg_size(void)
3996 return NLMSG_ALIGN(sizeof(struct ndmsg)) +
3997 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */
3998 nla_total_size(sizeof(u16)) + /* NDA_VLAN */
4002 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
4005 struct net *net = dev_net(dev);
4006 struct sk_buff *skb;
4009 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
4013 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
4014 0, 0, type, NTF_SELF, 0, ndm_state);
4020 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
4023 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
4027 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
4029 int ndo_dflt_fdb_add(struct ndmsg *ndm,
4030 struct nlattr *tb[],
4031 struct net_device *dev,
4032 const unsigned char *addr, u16 vid,
4037 /* If aging addresses are supported device will need to
4038 * implement its own handler for this.
4040 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
4041 netdev_info(dev, "default FDB implementation only supports local addresses\n");
4046 netdev_info(dev, "vlans aren't supported yet for dev_uc|mc_add()\n");
4050 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
4051 err = dev_uc_add_excl(dev, addr);
4052 else if (is_multicast_ether_addr(addr))
4053 err = dev_mc_add_excl(dev, addr);
4055 /* Only return duplicate errors if NLM_F_EXCL is set */
4056 if (err == -EEXIST && !(flags & NLM_F_EXCL))
4061 EXPORT_SYMBOL(ndo_dflt_fdb_add);
4063 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid,
4064 struct netlink_ext_ack *extack)
4069 if (nla_len(vlan_attr) != sizeof(u16)) {
4070 NL_SET_ERR_MSG(extack, "invalid vlan attribute size");
4074 vid = nla_get_u16(vlan_attr);
4076 if (!vid || vid >= VLAN_VID_MASK) {
4077 NL_SET_ERR_MSG(extack, "invalid vlan id");
4085 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
4086 struct netlink_ext_ack *extack)
4088 struct net *net = sock_net(skb->sk);
4090 struct nlattr *tb[NDA_MAX+1];
4091 struct net_device *dev;
4096 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL,
4101 ndm = nlmsg_data(nlh);
4102 if (ndm->ndm_ifindex == 0) {
4103 NL_SET_ERR_MSG(extack, "invalid ifindex");
4107 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
4109 NL_SET_ERR_MSG(extack, "unknown ifindex");
4113 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
4114 NL_SET_ERR_MSG(extack, "invalid address");
4118 if (dev->type != ARPHRD_ETHER) {
4119 NL_SET_ERR_MSG(extack, "FDB add only supported for Ethernet devices");
4123 addr = nla_data(tb[NDA_LLADDR]);
4125 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
4131 /* Support fdb on master device the net/bridge default case */
4132 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
4133 netif_is_bridge_port(dev)) {
4134 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4135 const struct net_device_ops *ops = br_dev->netdev_ops;
4137 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
4138 nlh->nlmsg_flags, extack);
4142 ndm->ndm_flags &= ~NTF_MASTER;
4145 /* Embedded bridge, macvlan, and any other device support */
4146 if ((ndm->ndm_flags & NTF_SELF)) {
4147 if (dev->netdev_ops->ndo_fdb_add)
4148 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
4153 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
4157 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
4159 ndm->ndm_flags &= ~NTF_SELF;
4167 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
4169 int ndo_dflt_fdb_del(struct ndmsg *ndm,
4170 struct nlattr *tb[],
4171 struct net_device *dev,
4172 const unsigned char *addr, u16 vid)
4176 /* If aging addresses are supported device will need to
4177 * implement its own handler for this.
4179 if (!(ndm->ndm_state & NUD_PERMANENT)) {
4180 netdev_info(dev, "default FDB implementation only supports local addresses\n");
4184 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
4185 err = dev_uc_del(dev, addr);
4186 else if (is_multicast_ether_addr(addr))
4187 err = dev_mc_del(dev, addr);
4191 EXPORT_SYMBOL(ndo_dflt_fdb_del);
4193 static const struct nla_policy fdb_del_bulk_policy[NDA_MAX + 1] = {
4194 [NDA_VLAN] = { .type = NLA_U16 },
4195 [NDA_IFINDEX] = NLA_POLICY_MIN(NLA_S32, 1),
4196 [NDA_NDM_STATE_MASK] = { .type = NLA_U16 },
4197 [NDA_NDM_FLAGS_MASK] = { .type = NLA_U8 },
4200 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
4201 struct netlink_ext_ack *extack)
4203 bool del_bulk = !!(nlh->nlmsg_flags & NLM_F_BULK);
4204 struct net *net = sock_net(skb->sk);
4205 const struct net_device_ops *ops;
4207 struct nlattr *tb[NDA_MAX+1];
4208 struct net_device *dev;
4213 if (!netlink_capable(skb, CAP_NET_ADMIN))
4217 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX,
4220 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX,
4221 fdb_del_bulk_policy, extack);
4226 ndm = nlmsg_data(nlh);
4227 if (ndm->ndm_ifindex == 0) {
4228 NL_SET_ERR_MSG(extack, "invalid ifindex");
4232 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
4234 NL_SET_ERR_MSG(extack, "unknown ifindex");
4239 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
4240 NL_SET_ERR_MSG(extack, "invalid address");
4243 addr = nla_data(tb[NDA_LLADDR]);
4246 if (dev->type != ARPHRD_ETHER) {
4247 NL_SET_ERR_MSG(extack, "FDB delete only supported for Ethernet devices");
4251 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
4257 /* Support fdb on master device the net/bridge default case */
4258 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
4259 netif_is_bridge_port(dev)) {
4260 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4262 ops = br_dev->netdev_ops;
4264 if (ops->ndo_fdb_del)
4265 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid, extack);
4267 if (ops->ndo_fdb_del_bulk)
4268 err = ops->ndo_fdb_del_bulk(ndm, tb, dev, vid,
4275 ndm->ndm_flags &= ~NTF_MASTER;
4278 /* Embedded bridge, macvlan, and any other device support */
4279 if (ndm->ndm_flags & NTF_SELF) {
4280 ops = dev->netdev_ops;
4282 if (ops->ndo_fdb_del)
4283 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid, extack);
4285 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
4287 /* in case err was cleared by NTF_MASTER call */
4289 if (ops->ndo_fdb_del_bulk)
4290 err = ops->ndo_fdb_del_bulk(ndm, tb, dev, vid,
4296 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
4298 ndm->ndm_flags &= ~NTF_SELF;
4305 static int nlmsg_populate_fdb(struct sk_buff *skb,
4306 struct netlink_callback *cb,
4307 struct net_device *dev,
4309 struct netdev_hw_addr_list *list)
4311 struct netdev_hw_addr *ha;
4315 portid = NETLINK_CB(cb->skb).portid;
4316 seq = cb->nlh->nlmsg_seq;
4318 list_for_each_entry(ha, &list->list, list) {
4319 if (*idx < cb->args[2])
4322 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
4324 RTM_NEWNEIGH, NTF_SELF,
4325 NLM_F_MULTI, NUD_PERMANENT);
4335 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
4336 * @skb: socket buffer to store message in
4337 * @cb: netlink callback
4339 * @filter_dev: ignored
4340 * @idx: the number of FDB table entries dumped is added to *@idx
4342 * Default netdevice operation to dump the existing unicast address list.
4343 * Returns number of addresses from list put in skb.
4345 int ndo_dflt_fdb_dump(struct sk_buff *skb,
4346 struct netlink_callback *cb,
4347 struct net_device *dev,
4348 struct net_device *filter_dev,
4353 if (dev->type != ARPHRD_ETHER)
4356 netif_addr_lock_bh(dev);
4357 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
4360 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
4362 netif_addr_unlock_bh(dev);
4365 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
4367 static int valid_fdb_dump_strict(const struct nlmsghdr *nlh,
4368 int *br_idx, int *brport_idx,
4369 struct netlink_ext_ack *extack)
4371 struct nlattr *tb[NDA_MAX + 1];
4375 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
4376 NL_SET_ERR_MSG(extack, "Invalid header for fdb dump request");
4380 ndm = nlmsg_data(nlh);
4381 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state ||
4382 ndm->ndm_flags || ndm->ndm_type) {
4383 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb dump request");
4387 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
4388 NDA_MAX, NULL, extack);
4392 *brport_idx = ndm->ndm_ifindex;
4393 for (i = 0; i <= NDA_MAX; ++i) {
4399 if (nla_len(tb[i]) != sizeof(u32)) {
4400 NL_SET_ERR_MSG(extack, "Invalid IFINDEX attribute in fdb dump request");
4403 *brport_idx = nla_get_u32(tb[NDA_IFINDEX]);
4406 if (nla_len(tb[i]) != sizeof(u32)) {
4407 NL_SET_ERR_MSG(extack, "Invalid MASTER attribute in fdb dump request");
4410 *br_idx = nla_get_u32(tb[NDA_MASTER]);
4413 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb dump request");
4421 static int valid_fdb_dump_legacy(const struct nlmsghdr *nlh,
4422 int *br_idx, int *brport_idx,
4423 struct netlink_ext_ack *extack)
4425 struct nlattr *tb[IFLA_MAX+1];
4428 /* A hack to preserve kernel<->userspace interface.
4429 * Before Linux v4.12 this code accepted ndmsg since iproute2 v3.3.0.
4430 * However, ndmsg is shorter than ifinfomsg thus nlmsg_parse() bails.
4431 * So, check for ndmsg with an optional u32 attribute (not used here).
4432 * Fortunately these sizes don't conflict with the size of ifinfomsg
4433 * with an optional attribute.
4435 if (nlmsg_len(nlh) != sizeof(struct ndmsg) &&
4436 (nlmsg_len(nlh) != sizeof(struct ndmsg) +
4437 nla_attr_size(sizeof(u32)))) {
4438 struct ifinfomsg *ifm;
4440 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
4441 tb, IFLA_MAX, ifla_policy,
4445 } else if (err == 0) {
4446 if (tb[IFLA_MASTER])
4447 *br_idx = nla_get_u32(tb[IFLA_MASTER]);
4450 ifm = nlmsg_data(nlh);
4451 *brport_idx = ifm->ifi_index;
4456 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
4458 struct net_device *dev;
4459 struct net_device *br_dev = NULL;
4460 const struct net_device_ops *ops = NULL;
4461 const struct net_device_ops *cops = NULL;
4462 struct net *net = sock_net(skb->sk);
4463 struct hlist_head *head;
4471 if (cb->strict_check)
4472 err = valid_fdb_dump_strict(cb->nlh, &br_idx, &brport_idx,
4475 err = valid_fdb_dump_legacy(cb->nlh, &br_idx, &brport_idx,
4481 br_dev = __dev_get_by_index(net, br_idx);
4485 ops = br_dev->netdev_ops;
4489 s_idx = cb->args[1];
4491 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4493 head = &net->dev_index_head[h];
4494 hlist_for_each_entry(dev, head, index_hlist) {
4496 if (brport_idx && (dev->ifindex != brport_idx))
4499 if (!br_idx) { /* user did not specify a specific bridge */
4500 if (netif_is_bridge_port(dev)) {
4501 br_dev = netdev_master_upper_dev_get(dev);
4502 cops = br_dev->netdev_ops;
4505 if (dev != br_dev &&
4506 !netif_is_bridge_port(dev))
4509 if (br_dev != netdev_master_upper_dev_get(dev) &&
4510 !netif_is_bridge_master(dev))
4518 if (netif_is_bridge_port(dev)) {
4519 if (cops && cops->ndo_fdb_dump) {
4520 err = cops->ndo_fdb_dump(skb, cb,
4523 if (err == -EMSGSIZE)
4528 if (dev->netdev_ops->ndo_fdb_dump)
4529 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
4533 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
4535 if (err == -EMSGSIZE)
4540 /* reset fdb offset to 0 for rest of the interfaces */
4556 static int valid_fdb_get_strict(const struct nlmsghdr *nlh,
4557 struct nlattr **tb, u8 *ndm_flags,
4558 int *br_idx, int *brport_idx, u8 **addr,
4559 u16 *vid, struct netlink_ext_ack *extack)
4564 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
4565 NL_SET_ERR_MSG(extack, "Invalid header for fdb get request");
4569 ndm = nlmsg_data(nlh);
4570 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state ||
4572 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb get request");
4576 if (ndm->ndm_flags & ~(NTF_MASTER | NTF_SELF)) {
4577 NL_SET_ERR_MSG(extack, "Invalid flags in header for fdb get request");
4581 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
4582 NDA_MAX, nda_policy, extack);
4586 *ndm_flags = ndm->ndm_flags;
4587 *brport_idx = ndm->ndm_ifindex;
4588 for (i = 0; i <= NDA_MAX; ++i) {
4594 *br_idx = nla_get_u32(tb[i]);
4597 if (nla_len(tb[i]) != ETH_ALEN) {
4598 NL_SET_ERR_MSG(extack, "Invalid address in fdb get request");
4601 *addr = nla_data(tb[i]);
4604 err = fdb_vid_parse(tb[i], vid, extack);
4611 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb get request");
4619 static int rtnl_fdb_get(struct sk_buff *in_skb, struct nlmsghdr *nlh,
4620 struct netlink_ext_ack *extack)
4622 struct net_device *dev = NULL, *br_dev = NULL;
4623 const struct net_device_ops *ops = NULL;
4624 struct net *net = sock_net(in_skb->sk);
4625 struct nlattr *tb[NDA_MAX + 1];
4626 struct sk_buff *skb;
4634 err = valid_fdb_get_strict(nlh, tb, &ndm_flags, &br_idx,
4635 &brport_idx, &addr, &vid, extack);
4640 NL_SET_ERR_MSG(extack, "Missing lookup address for fdb get request");
4645 dev = __dev_get_by_index(net, brport_idx);
4647 NL_SET_ERR_MSG(extack, "Unknown device ifindex");
4654 NL_SET_ERR_MSG(extack, "Master and device are mutually exclusive");
4658 br_dev = __dev_get_by_index(net, br_idx);
4660 NL_SET_ERR_MSG(extack, "Invalid master ifindex");
4663 ops = br_dev->netdev_ops;
4667 if (!ndm_flags || (ndm_flags & NTF_MASTER)) {
4668 if (!netif_is_bridge_port(dev)) {
4669 NL_SET_ERR_MSG(extack, "Device is not a bridge port");
4672 br_dev = netdev_master_upper_dev_get(dev);
4674 NL_SET_ERR_MSG(extack, "Master of device not found");
4677 ops = br_dev->netdev_ops;
4679 if (!(ndm_flags & NTF_SELF)) {
4680 NL_SET_ERR_MSG(extack, "Missing NTF_SELF");
4683 ops = dev->netdev_ops;
4687 if (!br_dev && !dev) {
4688 NL_SET_ERR_MSG(extack, "No device specified");
4692 if (!ops || !ops->ndo_fdb_get) {
4693 NL_SET_ERR_MSG(extack, "Fdb get operation not supported by device");
4697 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
4703 err = ops->ndo_fdb_get(skb, tb, dev, addr, vid,
4704 NETLINK_CB(in_skb).portid,
4705 nlh->nlmsg_seq, extack);
4709 return rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
4715 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
4716 unsigned int attrnum, unsigned int flag)
4719 return nla_put_u8(skb, attrnum, !!(flags & flag));
4723 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
4724 struct net_device *dev, u16 mode,
4725 u32 flags, u32 mask, int nlflags,
4727 int (*vlan_fill)(struct sk_buff *skb,
4728 struct net_device *dev,
4731 struct nlmsghdr *nlh;
4732 struct ifinfomsg *ifm;
4733 struct nlattr *br_afspec;
4734 struct nlattr *protinfo;
4735 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
4736 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4739 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
4743 ifm = nlmsg_data(nlh);
4744 ifm->ifi_family = AF_BRIDGE;
4746 ifm->ifi_type = dev->type;
4747 ifm->ifi_index = dev->ifindex;
4748 ifm->ifi_flags = dev_get_flags(dev);
4749 ifm->ifi_change = 0;
4752 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
4753 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
4754 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
4756 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
4758 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
4759 (dev->ifindex != dev_get_iflink(dev) &&
4760 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
4761 goto nla_put_failure;
4763 br_afspec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
4765 goto nla_put_failure;
4767 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
4768 nla_nest_cancel(skb, br_afspec);
4769 goto nla_put_failure;
4772 if (mode != BRIDGE_MODE_UNDEF) {
4773 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
4774 nla_nest_cancel(skb, br_afspec);
4775 goto nla_put_failure;
4779 err = vlan_fill(skb, dev, filter_mask);
4781 nla_nest_cancel(skb, br_afspec);
4782 goto nla_put_failure;
4785 nla_nest_end(skb, br_afspec);
4787 protinfo = nla_nest_start(skb, IFLA_PROTINFO);
4789 goto nla_put_failure;
4791 if (brport_nla_put_flag(skb, flags, mask,
4792 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
4793 brport_nla_put_flag(skb, flags, mask,
4794 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
4795 brport_nla_put_flag(skb, flags, mask,
4796 IFLA_BRPORT_FAST_LEAVE,
4797 BR_MULTICAST_FAST_LEAVE) ||
4798 brport_nla_put_flag(skb, flags, mask,
4799 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
4800 brport_nla_put_flag(skb, flags, mask,
4801 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
4802 brport_nla_put_flag(skb, flags, mask,
4803 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
4804 brport_nla_put_flag(skb, flags, mask,
4805 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
4806 brport_nla_put_flag(skb, flags, mask,
4807 IFLA_BRPORT_PROXYARP, BR_PROXYARP) ||
4808 brport_nla_put_flag(skb, flags, mask,
4809 IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD) ||
4810 brport_nla_put_flag(skb, flags, mask,
4811 IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD)) {
4812 nla_nest_cancel(skb, protinfo);
4813 goto nla_put_failure;
4816 nla_nest_end(skb, protinfo);
4818 nlmsg_end(skb, nlh);
4821 nlmsg_cancel(skb, nlh);
4822 return err ? err : -EMSGSIZE;
4824 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
4826 static int valid_bridge_getlink_req(const struct nlmsghdr *nlh,
4827 bool strict_check, u32 *filter_mask,
4828 struct netlink_ext_ack *extack)
4830 struct nlattr *tb[IFLA_MAX+1];
4834 struct ifinfomsg *ifm;
4836 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
4837 NL_SET_ERR_MSG(extack, "Invalid header for bridge link dump");
4841 ifm = nlmsg_data(nlh);
4842 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
4843 ifm->ifi_change || ifm->ifi_index) {
4844 NL_SET_ERR_MSG(extack, "Invalid values in header for bridge link dump request");
4848 err = nlmsg_parse_deprecated_strict(nlh,
4849 sizeof(struct ifinfomsg),
4850 tb, IFLA_MAX, ifla_policy,
4853 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
4854 tb, IFLA_MAX, ifla_policy,
4860 /* new attributes should only be added with strict checking */
4861 for (i = 0; i <= IFLA_MAX; ++i) {
4867 *filter_mask = nla_get_u32(tb[i]);
4871 NL_SET_ERR_MSG(extack, "Unsupported attribute in bridge link dump request");
4880 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
4882 const struct nlmsghdr *nlh = cb->nlh;
4883 struct net *net = sock_net(skb->sk);
4884 struct net_device *dev;
4886 u32 portid = NETLINK_CB(cb->skb).portid;
4887 u32 seq = nlh->nlmsg_seq;
4888 u32 filter_mask = 0;
4891 err = valid_bridge_getlink_req(nlh, cb->strict_check, &filter_mask,
4893 if (err < 0 && cb->strict_check)
4897 for_each_netdev_rcu(net, dev) {
4898 const struct net_device_ops *ops = dev->netdev_ops;
4899 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4901 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
4902 if (idx >= cb->args[0]) {
4903 err = br_dev->netdev_ops->ndo_bridge_getlink(
4904 skb, portid, seq, dev,
4905 filter_mask, NLM_F_MULTI);
4906 if (err < 0 && err != -EOPNOTSUPP) {
4907 if (likely(skb->len))
4916 if (ops->ndo_bridge_getlink) {
4917 if (idx >= cb->args[0]) {
4918 err = ops->ndo_bridge_getlink(skb, portid,
4922 if (err < 0 && err != -EOPNOTSUPP) {
4923 if (likely(skb->len))
4940 static inline size_t bridge_nlmsg_size(void)
4942 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
4943 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
4944 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
4945 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
4946 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
4947 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
4948 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
4949 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
4950 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
4951 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
4952 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
4955 static int rtnl_bridge_notify(struct net_device *dev)
4957 struct net *net = dev_net(dev);
4958 struct sk_buff *skb;
4959 int err = -EOPNOTSUPP;
4961 if (!dev->netdev_ops->ndo_bridge_getlink)
4964 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
4970 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
4974 /* Notification info is only filled for bridge ports, not the bridge
4975 * device itself. Therefore, a zero notification length is valid and
4976 * should not result in an error.
4981 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
4984 WARN_ON(err == -EMSGSIZE);
4987 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
4991 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
4992 struct netlink_ext_ack *extack)
4994 struct net *net = sock_net(skb->sk);
4995 struct ifinfomsg *ifm;
4996 struct net_device *dev;
4997 struct nlattr *br_spec, *attr = NULL;
4998 int rem, err = -EOPNOTSUPP;
5000 bool have_flags = false;
5002 if (nlmsg_len(nlh) < sizeof(*ifm))
5005 ifm = nlmsg_data(nlh);
5006 if (ifm->ifi_family != AF_BRIDGE)
5007 return -EPFNOSUPPORT;
5009 dev = __dev_get_by_index(net, ifm->ifi_index);
5011 NL_SET_ERR_MSG(extack, "unknown ifindex");
5015 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
5017 nla_for_each_nested(attr, br_spec, rem) {
5018 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
5019 if (nla_len(attr) < sizeof(flags))
5023 flags = nla_get_u16(attr);
5029 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
5030 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
5032 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
5037 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags,
5042 flags &= ~BRIDGE_FLAGS_MASTER;
5045 if ((flags & BRIDGE_FLAGS_SELF)) {
5046 if (!dev->netdev_ops->ndo_bridge_setlink)
5049 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
5053 flags &= ~BRIDGE_FLAGS_SELF;
5055 /* Generate event to notify upper layer of bridge
5058 err = rtnl_bridge_notify(dev);
5063 memcpy(nla_data(attr), &flags, sizeof(flags));
5068 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
5069 struct netlink_ext_ack *extack)
5071 struct net *net = sock_net(skb->sk);
5072 struct ifinfomsg *ifm;
5073 struct net_device *dev;
5074 struct nlattr *br_spec, *attr = NULL;
5075 int rem, err = -EOPNOTSUPP;
5077 bool have_flags = false;
5079 if (nlmsg_len(nlh) < sizeof(*ifm))
5082 ifm = nlmsg_data(nlh);
5083 if (ifm->ifi_family != AF_BRIDGE)
5084 return -EPFNOSUPPORT;
5086 dev = __dev_get_by_index(net, ifm->ifi_index);
5088 NL_SET_ERR_MSG(extack, "unknown ifindex");
5092 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
5094 nla_for_each_nested(attr, br_spec, rem) {
5095 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
5096 if (nla_len(attr) < sizeof(flags))
5100 flags = nla_get_u16(attr);
5106 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
5107 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
5109 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
5114 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
5118 flags &= ~BRIDGE_FLAGS_MASTER;
5121 if ((flags & BRIDGE_FLAGS_SELF)) {
5122 if (!dev->netdev_ops->ndo_bridge_dellink)
5125 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
5129 flags &= ~BRIDGE_FLAGS_SELF;
5131 /* Generate event to notify upper layer of bridge
5134 err = rtnl_bridge_notify(dev);
5139 memcpy(nla_data(attr), &flags, sizeof(flags));
5144 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
5146 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
5147 (!idxattr || idxattr == attrid);
5151 rtnl_offload_xstats_have_ndo(const struct net_device *dev, int attr_id)
5153 return dev->netdev_ops &&
5154 dev->netdev_ops->ndo_has_offload_stats &&
5155 dev->netdev_ops->ndo_get_offload_stats &&
5156 dev->netdev_ops->ndo_has_offload_stats(dev, attr_id);
5160 rtnl_offload_xstats_get_size_ndo(const struct net_device *dev, int attr_id)
5162 return rtnl_offload_xstats_have_ndo(dev, attr_id) ?
5163 sizeof(struct rtnl_link_stats64) : 0;
5167 rtnl_offload_xstats_fill_ndo(struct net_device *dev, int attr_id,
5168 struct sk_buff *skb)
5170 unsigned int size = rtnl_offload_xstats_get_size_ndo(dev, attr_id);
5171 struct nlattr *attr = NULL;
5178 attr = nla_reserve_64bit(skb, attr_id, size,
5179 IFLA_OFFLOAD_XSTATS_UNSPEC);
5183 attr_data = nla_data(attr);
5184 memset(attr_data, 0, size);
5186 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev, attr_data);
5194 rtnl_offload_xstats_get_size_stats(const struct net_device *dev,
5195 enum netdev_offload_xstats_type type)
5197 bool enabled = netdev_offload_xstats_enabled(dev, type);
5199 return enabled ? sizeof(struct rtnl_hw_stats64) : 0;
5202 struct rtnl_offload_xstats_request_used {
5208 rtnl_offload_xstats_get_stats(struct net_device *dev,
5209 enum netdev_offload_xstats_type type,
5210 struct rtnl_offload_xstats_request_used *ru,
5211 struct rtnl_hw_stats64 *stats,
5212 struct netlink_ext_ack *extack)
5218 request = netdev_offload_xstats_enabled(dev, type);
5224 err = netdev_offload_xstats_get(dev, type, stats, &used, extack);
5230 ru->request = request;
5237 rtnl_offload_xstats_fill_hw_s_info_one(struct sk_buff *skb, int attr_id,
5238 struct rtnl_offload_xstats_request_used *ru)
5240 struct nlattr *nest;
5242 nest = nla_nest_start(skb, attr_id);
5246 if (nla_put_u8(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO_REQUEST, ru->request))
5247 goto nla_put_failure;
5249 if (nla_put_u8(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO_USED, ru->used))
5250 goto nla_put_failure;
5252 nla_nest_end(skb, nest);
5256 nla_nest_cancel(skb, nest);
5261 rtnl_offload_xstats_fill_hw_s_info(struct sk_buff *skb, struct net_device *dev,
5262 struct netlink_ext_ack *extack)
5264 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
5265 struct rtnl_offload_xstats_request_used ru_l3;
5266 struct nlattr *nest;
5269 err = rtnl_offload_xstats_get_stats(dev, t_l3, &ru_l3, NULL, extack);
5273 nest = nla_nest_start(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO);
5277 if (rtnl_offload_xstats_fill_hw_s_info_one(skb,
5278 IFLA_OFFLOAD_XSTATS_L3_STATS,
5280 goto nla_put_failure;
5282 nla_nest_end(skb, nest);
5286 nla_nest_cancel(skb, nest);
5290 static int rtnl_offload_xstats_fill(struct sk_buff *skb, struct net_device *dev,
5291 int *prividx, u32 off_filter_mask,
5292 struct netlink_ext_ack *extack)
5294 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
5295 int attr_id_hw_s_info = IFLA_OFFLOAD_XSTATS_HW_S_INFO;
5296 int attr_id_l3_stats = IFLA_OFFLOAD_XSTATS_L3_STATS;
5297 int attr_id_cpu_hit = IFLA_OFFLOAD_XSTATS_CPU_HIT;
5298 bool have_data = false;
5301 if (*prividx <= attr_id_cpu_hit &&
5303 IFLA_STATS_FILTER_BIT(attr_id_cpu_hit))) {
5304 err = rtnl_offload_xstats_fill_ndo(dev, attr_id_cpu_hit, skb);
5307 } else if (err != -ENODATA) {
5308 *prividx = attr_id_cpu_hit;
5313 if (*prividx <= attr_id_hw_s_info &&
5314 (off_filter_mask & IFLA_STATS_FILTER_BIT(attr_id_hw_s_info))) {
5315 *prividx = attr_id_hw_s_info;
5317 err = rtnl_offload_xstats_fill_hw_s_info(skb, dev, extack);
5325 if (*prividx <= attr_id_l3_stats &&
5326 (off_filter_mask & IFLA_STATS_FILTER_BIT(attr_id_l3_stats))) {
5327 unsigned int size_l3;
5328 struct nlattr *attr;
5330 *prividx = attr_id_l3_stats;
5332 size_l3 = rtnl_offload_xstats_get_size_stats(dev, t_l3);
5335 attr = nla_reserve_64bit(skb, attr_id_l3_stats, size_l3,
5336 IFLA_OFFLOAD_XSTATS_UNSPEC);
5340 err = rtnl_offload_xstats_get_stats(dev, t_l3, NULL,
5341 nla_data(attr), extack);
5358 rtnl_offload_xstats_get_size_hw_s_info_one(const struct net_device *dev,
5359 enum netdev_offload_xstats_type type)
5361 bool enabled = netdev_offload_xstats_enabled(dev, type);
5363 return nla_total_size(0) +
5364 /* IFLA_OFFLOAD_XSTATS_HW_S_INFO_REQUEST */
5365 nla_total_size(sizeof(u8)) +
5366 /* IFLA_OFFLOAD_XSTATS_HW_S_INFO_USED */
5367 (enabled ? nla_total_size(sizeof(u8)) : 0) +
5372 rtnl_offload_xstats_get_size_hw_s_info(const struct net_device *dev)
5374 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
5376 return nla_total_size(0) +
5377 /* IFLA_OFFLOAD_XSTATS_L3_STATS */
5378 rtnl_offload_xstats_get_size_hw_s_info_one(dev, t_l3) +
5382 static int rtnl_offload_xstats_get_size(const struct net_device *dev,
5383 u32 off_filter_mask)
5385 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
5386 int attr_id_cpu_hit = IFLA_OFFLOAD_XSTATS_CPU_HIT;
5390 if (off_filter_mask &
5391 IFLA_STATS_FILTER_BIT(attr_id_cpu_hit)) {
5392 size = rtnl_offload_xstats_get_size_ndo(dev, attr_id_cpu_hit);
5393 nla_size += nla_total_size_64bit(size);
5396 if (off_filter_mask &
5397 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO))
5398 nla_size += rtnl_offload_xstats_get_size_hw_s_info(dev);
5400 if (off_filter_mask &
5401 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_L3_STATS)) {
5402 size = rtnl_offload_xstats_get_size_stats(dev, t_l3);
5403 nla_size += nla_total_size_64bit(size);
5407 nla_size += nla_total_size(0);
5412 struct rtnl_stats_dump_filters {
5413 /* mask[0] filters outer attributes. Then individual nests have their
5414 * filtering mask at the index of the nested attribute.
5416 u32 mask[IFLA_STATS_MAX + 1];
5419 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
5420 int type, u32 pid, u32 seq, u32 change,
5422 const struct rtnl_stats_dump_filters *filters,
5423 int *idxattr, int *prividx,
5424 struct netlink_ext_ack *extack)
5426 unsigned int filter_mask = filters->mask[0];
5427 struct if_stats_msg *ifsm;
5428 struct nlmsghdr *nlh;
5429 struct nlattr *attr;
5430 int s_prividx = *prividx;
5435 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
5439 ifsm = nlmsg_data(nlh);
5440 ifsm->family = PF_UNSPEC;
5443 ifsm->ifindex = dev->ifindex;
5444 ifsm->filter_mask = filter_mask;
5446 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
5447 struct rtnl_link_stats64 *sp;
5449 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
5450 sizeof(struct rtnl_link_stats64),
5454 goto nla_put_failure;
5457 sp = nla_data(attr);
5458 dev_get_stats(dev, sp);
5461 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
5462 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
5464 if (ops && ops->fill_linkxstats) {
5465 *idxattr = IFLA_STATS_LINK_XSTATS;
5466 attr = nla_nest_start_noflag(skb,
5467 IFLA_STATS_LINK_XSTATS);
5470 goto nla_put_failure;
5473 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
5474 nla_nest_end(skb, attr);
5476 goto nla_put_failure;
5481 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
5483 const struct rtnl_link_ops *ops = NULL;
5484 const struct net_device *master;
5486 master = netdev_master_upper_dev_get(dev);
5488 ops = master->rtnl_link_ops;
5489 if (ops && ops->fill_linkxstats) {
5490 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
5491 attr = nla_nest_start_noflag(skb,
5492 IFLA_STATS_LINK_XSTATS_SLAVE);
5495 goto nla_put_failure;
5498 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
5499 nla_nest_end(skb, attr);
5501 goto nla_put_failure;
5506 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
5508 u32 off_filter_mask;
5510 off_filter_mask = filters->mask[IFLA_STATS_LINK_OFFLOAD_XSTATS];
5511 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
5512 attr = nla_nest_start_noflag(skb,
5513 IFLA_STATS_LINK_OFFLOAD_XSTATS);
5516 goto nla_put_failure;
5519 err = rtnl_offload_xstats_fill(skb, dev, prividx,
5520 off_filter_mask, extack);
5521 if (err == -ENODATA)
5522 nla_nest_cancel(skb, attr);
5524 nla_nest_end(skb, attr);
5526 if (err && err != -ENODATA)
5527 goto nla_put_failure;
5531 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
5532 struct rtnl_af_ops *af_ops;
5534 *idxattr = IFLA_STATS_AF_SPEC;
5535 attr = nla_nest_start_noflag(skb, IFLA_STATS_AF_SPEC);
5538 goto nla_put_failure;
5542 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
5543 if (af_ops->fill_stats_af) {
5546 af = nla_nest_start_noflag(skb,
5551 goto nla_put_failure;
5553 err = af_ops->fill_stats_af(skb, dev);
5555 if (err == -ENODATA) {
5556 nla_nest_cancel(skb, af);
5557 } else if (err < 0) {
5559 goto nla_put_failure;
5562 nla_nest_end(skb, af);
5567 nla_nest_end(skb, attr);
5572 nlmsg_end(skb, nlh);
5577 /* not a multi message or no progress mean a real error */
5578 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
5579 nlmsg_cancel(skb, nlh);
5581 nlmsg_end(skb, nlh);
5586 static size_t if_nlmsg_stats_size(const struct net_device *dev,
5587 const struct rtnl_stats_dump_filters *filters)
5589 size_t size = NLMSG_ALIGN(sizeof(struct if_stats_msg));
5590 unsigned int filter_mask = filters->mask[0];
5592 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
5593 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
5595 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
5596 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
5597 int attr = IFLA_STATS_LINK_XSTATS;
5599 if (ops && ops->get_linkxstats_size) {
5600 size += nla_total_size(ops->get_linkxstats_size(dev,
5602 /* for IFLA_STATS_LINK_XSTATS */
5603 size += nla_total_size(0);
5607 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
5608 struct net_device *_dev = (struct net_device *)dev;
5609 const struct rtnl_link_ops *ops = NULL;
5610 const struct net_device *master;
5612 /* netdev_master_upper_dev_get can't take const */
5613 master = netdev_master_upper_dev_get(_dev);
5615 ops = master->rtnl_link_ops;
5616 if (ops && ops->get_linkxstats_size) {
5617 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
5619 size += nla_total_size(ops->get_linkxstats_size(dev,
5621 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
5622 size += nla_total_size(0);
5626 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0)) {
5627 u32 off_filter_mask;
5629 off_filter_mask = filters->mask[IFLA_STATS_LINK_OFFLOAD_XSTATS];
5630 size += rtnl_offload_xstats_get_size(dev, off_filter_mask);
5633 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
5634 struct rtnl_af_ops *af_ops;
5636 /* for IFLA_STATS_AF_SPEC */
5637 size += nla_total_size(0);
5640 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
5641 if (af_ops->get_stats_af_size) {
5642 size += nla_total_size(
5643 af_ops->get_stats_af_size(dev));
5646 size += nla_total_size(0);
5655 #define RTNL_STATS_OFFLOAD_XSTATS_VALID ((1 << __IFLA_OFFLOAD_XSTATS_MAX) - 1)
5657 static const struct nla_policy
5658 rtnl_stats_get_policy_filters[IFLA_STATS_MAX + 1] = {
5659 [IFLA_STATS_LINK_OFFLOAD_XSTATS] =
5660 NLA_POLICY_MASK(NLA_U32, RTNL_STATS_OFFLOAD_XSTATS_VALID),
5663 static const struct nla_policy
5664 rtnl_stats_get_policy[IFLA_STATS_GETSET_MAX + 1] = {
5665 [IFLA_STATS_GET_FILTERS] =
5666 NLA_POLICY_NESTED(rtnl_stats_get_policy_filters),
5669 static const struct nla_policy
5670 ifla_stats_set_policy[IFLA_STATS_GETSET_MAX + 1] = {
5671 [IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS] = NLA_POLICY_MAX(NLA_U8, 1),
5674 static int rtnl_stats_get_parse_filters(struct nlattr *ifla_filters,
5675 struct rtnl_stats_dump_filters *filters,
5676 struct netlink_ext_ack *extack)
5678 struct nlattr *tb[IFLA_STATS_MAX + 1];
5682 err = nla_parse_nested(tb, IFLA_STATS_MAX, ifla_filters,
5683 rtnl_stats_get_policy_filters, extack);
5687 for (at = 1; at <= IFLA_STATS_MAX; at++) {
5689 if (!(filters->mask[0] & IFLA_STATS_FILTER_BIT(at))) {
5690 NL_SET_ERR_MSG(extack, "Filtered attribute not enabled in filter_mask");
5693 filters->mask[at] = nla_get_u32(tb[at]);
5700 static int rtnl_stats_get_parse(const struct nlmsghdr *nlh,
5702 struct rtnl_stats_dump_filters *filters,
5703 struct netlink_ext_ack *extack)
5705 struct nlattr *tb[IFLA_STATS_GETSET_MAX + 1];
5709 filters->mask[0] = filter_mask;
5710 for (i = 1; i < ARRAY_SIZE(filters->mask); i++)
5711 filters->mask[i] = -1U;
5713 err = nlmsg_parse(nlh, sizeof(struct if_stats_msg), tb,
5714 IFLA_STATS_GETSET_MAX, rtnl_stats_get_policy, extack);
5718 if (tb[IFLA_STATS_GET_FILTERS]) {
5719 err = rtnl_stats_get_parse_filters(tb[IFLA_STATS_GET_FILTERS],
5728 static int rtnl_valid_stats_req(const struct nlmsghdr *nlh, bool strict_check,
5729 bool is_dump, struct netlink_ext_ack *extack)
5731 struct if_stats_msg *ifsm;
5733 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifsm))) {
5734 NL_SET_ERR_MSG(extack, "Invalid header for stats dump");
5741 ifsm = nlmsg_data(nlh);
5743 /* only requests using strict checks can pass data to influence
5744 * the dump. The legacy exception is filter_mask.
5746 if (ifsm->pad1 || ifsm->pad2 || (is_dump && ifsm->ifindex)) {
5747 NL_SET_ERR_MSG(extack, "Invalid values in header for stats dump request");
5750 if (ifsm->filter_mask >= IFLA_STATS_FILTER_BIT(IFLA_STATS_MAX + 1)) {
5751 NL_SET_ERR_MSG(extack, "Invalid stats requested through filter mask");
5758 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
5759 struct netlink_ext_ack *extack)
5761 struct rtnl_stats_dump_filters filters;
5762 struct net *net = sock_net(skb->sk);
5763 struct net_device *dev = NULL;
5764 int idxattr = 0, prividx = 0;
5765 struct if_stats_msg *ifsm;
5766 struct sk_buff *nskb;
5769 err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb),
5774 ifsm = nlmsg_data(nlh);
5775 if (ifsm->ifindex > 0)
5776 dev = __dev_get_by_index(net, ifsm->ifindex);
5783 if (!ifsm->filter_mask) {
5784 NL_SET_ERR_MSG(extack, "Filter mask must be set for stats get");
5788 err = rtnl_stats_get_parse(nlh, ifsm->filter_mask, &filters, extack);
5792 nskb = nlmsg_new(if_nlmsg_stats_size(dev, &filters), GFP_KERNEL);
5796 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
5797 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
5798 0, &filters, &idxattr, &prividx, extack);
5800 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
5801 WARN_ON(err == -EMSGSIZE);
5804 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
5810 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
5812 struct netlink_ext_ack *extack = cb->extack;
5813 int h, s_h, err, s_idx, s_idxattr, s_prividx;
5814 struct rtnl_stats_dump_filters filters;
5815 struct net *net = sock_net(skb->sk);
5816 unsigned int flags = NLM_F_MULTI;
5817 struct if_stats_msg *ifsm;
5818 struct hlist_head *head;
5819 struct net_device *dev;
5823 s_idx = cb->args[1];
5824 s_idxattr = cb->args[2];
5825 s_prividx = cb->args[3];
5827 cb->seq = net->dev_base_seq;
5829 err = rtnl_valid_stats_req(cb->nlh, cb->strict_check, true, extack);
5833 ifsm = nlmsg_data(cb->nlh);
5834 if (!ifsm->filter_mask) {
5835 NL_SET_ERR_MSG(extack, "Filter mask must be set for stats dump");
5839 err = rtnl_stats_get_parse(cb->nlh, ifsm->filter_mask, &filters,
5844 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
5846 head = &net->dev_index_head[h];
5847 hlist_for_each_entry(dev, head, index_hlist) {
5850 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
5851 NETLINK_CB(cb->skb).portid,
5852 cb->nlh->nlmsg_seq, 0,
5854 &s_idxattr, &s_prividx,
5856 /* If we ran out of room on the first message,
5859 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
5865 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
5871 cb->args[3] = s_prividx;
5872 cb->args[2] = s_idxattr;
5879 void rtnl_offload_xstats_notify(struct net_device *dev)
5881 struct rtnl_stats_dump_filters response_filters = {};
5882 struct net *net = dev_net(dev);
5883 int idxattr = 0, prividx = 0;
5884 struct sk_buff *skb;
5889 response_filters.mask[0] |=
5890 IFLA_STATS_FILTER_BIT(IFLA_STATS_LINK_OFFLOAD_XSTATS);
5891 response_filters.mask[IFLA_STATS_LINK_OFFLOAD_XSTATS] |=
5892 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO);
5894 skb = nlmsg_new(if_nlmsg_stats_size(dev, &response_filters),
5899 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS, 0, 0, 0, 0,
5900 &response_filters, &idxattr, &prividx, NULL);
5906 rtnl_notify(skb, net, 0, RTNLGRP_STATS, NULL, GFP_KERNEL);
5910 rtnl_set_sk_err(net, RTNLGRP_STATS, err);
5912 EXPORT_SYMBOL(rtnl_offload_xstats_notify);
5914 static int rtnl_stats_set(struct sk_buff *skb, struct nlmsghdr *nlh,
5915 struct netlink_ext_ack *extack)
5917 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
5918 struct rtnl_stats_dump_filters response_filters = {};
5919 struct nlattr *tb[IFLA_STATS_GETSET_MAX + 1];
5920 struct net *net = sock_net(skb->sk);
5921 struct net_device *dev = NULL;
5922 struct if_stats_msg *ifsm;
5923 bool notify = false;
5926 err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb),
5931 ifsm = nlmsg_data(nlh);
5932 if (ifsm->family != AF_UNSPEC) {
5933 NL_SET_ERR_MSG(extack, "Address family should be AF_UNSPEC");
5937 if (ifsm->ifindex > 0)
5938 dev = __dev_get_by_index(net, ifsm->ifindex);
5945 if (ifsm->filter_mask) {
5946 NL_SET_ERR_MSG(extack, "Filter mask must be 0 for stats set");
5950 err = nlmsg_parse(nlh, sizeof(*ifsm), tb, IFLA_STATS_GETSET_MAX,
5951 ifla_stats_set_policy, extack);
5955 if (tb[IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS]) {
5956 u8 req = nla_get_u8(tb[IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS]);
5959 err = netdev_offload_xstats_enable(dev, t_l3, extack);
5961 err = netdev_offload_xstats_disable(dev, t_l3);
5965 else if (err != -EALREADY)
5968 response_filters.mask[0] |=
5969 IFLA_STATS_FILTER_BIT(IFLA_STATS_LINK_OFFLOAD_XSTATS);
5970 response_filters.mask[IFLA_STATS_LINK_OFFLOAD_XSTATS] |=
5971 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO);
5975 rtnl_offload_xstats_notify(dev);
5980 /* Process one rtnetlink message. */
5982 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
5983 struct netlink_ext_ack *extack)
5985 struct net *net = sock_net(skb->sk);
5986 struct rtnl_link *link;
5987 enum rtnl_kinds kind;
5988 struct module *owner;
5989 int err = -EOPNOTSUPP;
5990 rtnl_doit_func doit;
5995 type = nlh->nlmsg_type;
6001 /* All the messages must have at least 1 byte length */
6002 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
6005 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
6006 kind = rtnl_msgtype_kind(type);
6008 if (kind != RTNL_KIND_GET && !netlink_net_capable(skb, CAP_NET_ADMIN))
6012 if (kind == RTNL_KIND_GET && (nlh->nlmsg_flags & NLM_F_DUMP)) {
6014 rtnl_dumpit_func dumpit;
6015 u32 min_dump_alloc = 0;
6017 link = rtnl_get_link(family, type);
6018 if (!link || !link->dumpit) {
6020 link = rtnl_get_link(family, type);
6021 if (!link || !link->dumpit)
6024 owner = link->owner;
6025 dumpit = link->dumpit;
6027 if (type == RTM_GETLINK - RTM_BASE)
6028 min_dump_alloc = rtnl_calcit(skb, nlh);
6031 /* need to do this before rcu_read_unlock() */
6032 if (!try_module_get(owner))
6033 err = -EPROTONOSUPPORT;
6039 struct netlink_dump_control c = {
6041 .min_dump_alloc = min_dump_alloc,
6044 err = netlink_dump_start(rtnl, skb, nlh, &c);
6045 /* netlink_dump_start() will keep a reference on
6046 * module if dump is still in progress.
6053 link = rtnl_get_link(family, type);
6054 if (!link || !link->doit) {
6056 link = rtnl_get_link(PF_UNSPEC, type);
6057 if (!link || !link->doit)
6061 owner = link->owner;
6062 if (!try_module_get(owner)) {
6063 err = -EPROTONOSUPPORT;
6067 flags = link->flags;
6068 if (kind == RTNL_KIND_DEL && (nlh->nlmsg_flags & NLM_F_BULK) &&
6069 !(flags & RTNL_FLAG_BULK_DEL_SUPPORTED)) {
6070 NL_SET_ERR_MSG(extack, "Bulk delete is not supported");
6075 if (flags & RTNL_FLAG_DOIT_UNLOCKED) {
6079 err = doit(skb, nlh, extack);
6086 link = rtnl_get_link(family, type);
6087 if (link && link->doit)
6088 err = link->doit(skb, nlh, extack);
6104 static void rtnetlink_rcv(struct sk_buff *skb)
6106 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
6109 static int rtnetlink_bind(struct net *net, int group)
6112 case RTNLGRP_IPV4_MROUTE_R:
6113 case RTNLGRP_IPV6_MROUTE_R:
6114 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
6121 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
6123 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
6127 case NETDEV_CHANGEMTU:
6128 case NETDEV_CHANGEADDR:
6129 case NETDEV_CHANGENAME:
6130 case NETDEV_FEAT_CHANGE:
6131 case NETDEV_BONDING_FAILOVER:
6132 case NETDEV_POST_TYPE_CHANGE:
6133 case NETDEV_NOTIFY_PEERS:
6134 case NETDEV_CHANGEUPPER:
6135 case NETDEV_RESEND_IGMP:
6136 case NETDEV_CHANGEINFODATA:
6137 case NETDEV_CHANGELOWERSTATE:
6138 case NETDEV_CHANGE_TX_QUEUE_LEN:
6139 rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event),
6140 GFP_KERNEL, NULL, 0);
6148 static struct notifier_block rtnetlink_dev_notifier = {
6149 .notifier_call = rtnetlink_event,
6153 static int __net_init rtnetlink_net_init(struct net *net)
6156 struct netlink_kernel_cfg cfg = {
6157 .groups = RTNLGRP_MAX,
6158 .input = rtnetlink_rcv,
6159 .cb_mutex = &rtnl_mutex,
6160 .flags = NL_CFG_F_NONROOT_RECV,
6161 .bind = rtnetlink_bind,
6164 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
6171 static void __net_exit rtnetlink_net_exit(struct net *net)
6173 netlink_kernel_release(net->rtnl);
6177 static struct pernet_operations rtnetlink_net_ops = {
6178 .init = rtnetlink_net_init,
6179 .exit = rtnetlink_net_exit,
6182 void __init rtnetlink_init(void)
6184 if (register_pernet_subsys(&rtnetlink_net_ops))
6185 panic("rtnetlink_init: cannot initialize rtnetlink\n");
6187 register_netdevice_notifier(&rtnetlink_dev_notifier);
6189 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
6190 rtnl_dump_ifinfo, 0);
6191 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, 0);
6192 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, 0);
6193 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, 0);
6195 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, 0);
6196 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, 0);
6197 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, 0);
6199 rtnl_register(PF_UNSPEC, RTM_NEWLINKPROP, rtnl_newlinkprop, NULL, 0);
6200 rtnl_register(PF_UNSPEC, RTM_DELLINKPROP, rtnl_dellinkprop, NULL, 0);
6202 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0);
6203 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL,
6204 RTNL_FLAG_BULK_DEL_SUPPORTED);
6205 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, rtnl_fdb_get, rtnl_fdb_dump, 0);
6207 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, 0);
6208 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, 0);
6209 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, 0);
6211 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
6213 rtnl_register(PF_UNSPEC, RTM_SETSTATS, rtnl_stats_set, NULL, 0);