2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Routing netlink socket interface: protocol independent part.
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
19 #include <linux/bitops.h>
20 #include <linux/errno.h>
21 #include <linux/module.h>
22 #include <linux/types.h>
23 #include <linux/socket.h>
24 #include <linux/kernel.h>
25 #include <linux/timer.h>
26 #include <linux/string.h>
27 #include <linux/sockios.h>
28 #include <linux/net.h>
29 #include <linux/fcntl.h>
31 #include <linux/slab.h>
32 #include <linux/interrupt.h>
33 #include <linux/capability.h>
34 #include <linux/skbuff.h>
35 #include <linux/init.h>
36 #include <linux/security.h>
37 #include <linux/mutex.h>
38 #include <linux/if_addr.h>
39 #include <linux/if_bridge.h>
40 #include <linux/if_vlan.h>
41 #include <linux/pci.h>
42 #include <linux/etherdevice.h>
43 #include <linux/bpf.h>
45 #include <linux/uaccess.h>
47 #include <linux/inet.h>
48 #include <linux/netdevice.h>
49 #include <net/switchdev.h>
51 #include <net/protocol.h>
53 #include <net/route.h>
57 #include <net/pkt_sched.h>
58 #include <net/fib_rules.h>
59 #include <net/rtnetlink.h>
60 #include <net/net_namespace.h>
62 #define RTNL_MAX_TYPE 48
63 #define RTNL_SLAVE_MAX_TYPE 36
67 rtnl_dumpit_func dumpit;
73 static DEFINE_MUTEX(rtnl_mutex);
77 mutex_lock(&rtnl_mutex);
79 EXPORT_SYMBOL(rtnl_lock);
81 int rtnl_lock_killable(void)
83 return mutex_lock_killable(&rtnl_mutex);
85 EXPORT_SYMBOL(rtnl_lock_killable);
87 static struct sk_buff *defer_kfree_skb_list;
88 void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
91 tail->next = defer_kfree_skb_list;
92 defer_kfree_skb_list = head;
95 EXPORT_SYMBOL(rtnl_kfree_skbs);
97 void __rtnl_unlock(void)
99 struct sk_buff *head = defer_kfree_skb_list;
101 defer_kfree_skb_list = NULL;
103 mutex_unlock(&rtnl_mutex);
106 struct sk_buff *next = head->next;
114 void rtnl_unlock(void)
116 /* This fellow will unlock it for us. */
119 EXPORT_SYMBOL(rtnl_unlock);
121 int rtnl_trylock(void)
123 return mutex_trylock(&rtnl_mutex);
125 EXPORT_SYMBOL(rtnl_trylock);
127 int rtnl_is_locked(void)
129 return mutex_is_locked(&rtnl_mutex);
131 EXPORT_SYMBOL(rtnl_is_locked);
133 #ifdef CONFIG_PROVE_LOCKING
134 bool lockdep_rtnl_is_held(void)
136 return lockdep_is_held(&rtnl_mutex);
138 EXPORT_SYMBOL(lockdep_rtnl_is_held);
139 #endif /* #ifdef CONFIG_PROVE_LOCKING */
141 static struct rtnl_link *__rcu *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
143 static inline int rtm_msgindex(int msgtype)
145 int msgindex = msgtype - RTM_BASE;
148 * msgindex < 0 implies someone tried to register a netlink
149 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
150 * the message type has not been added to linux/rtnetlink.h
152 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
157 static struct rtnl_link *rtnl_get_link(int protocol, int msgtype)
159 struct rtnl_link **tab;
161 if (protocol >= ARRAY_SIZE(rtnl_msg_handlers))
162 protocol = PF_UNSPEC;
164 tab = rcu_dereference_rtnl(rtnl_msg_handlers[protocol]);
166 tab = rcu_dereference_rtnl(rtnl_msg_handlers[PF_UNSPEC]);
171 static int rtnl_register_internal(struct module *owner,
172 int protocol, int msgtype,
173 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
176 struct rtnl_link *link, *old;
177 struct rtnl_link __rcu **tab;
181 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
182 msgindex = rtm_msgindex(msgtype);
185 tab = rtnl_msg_handlers[protocol];
187 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(void *), GFP_KERNEL);
191 /* ensures we see the 0 stores */
192 rcu_assign_pointer(rtnl_msg_handlers[protocol], tab);
195 old = rtnl_dereference(tab[msgindex]);
197 link = kmemdup(old, sizeof(*old), GFP_KERNEL);
201 link = kzalloc(sizeof(*link), GFP_KERNEL);
206 WARN_ON(link->owner && link->owner != owner);
209 WARN_ON(doit && link->doit && link->doit != doit);
212 WARN_ON(dumpit && link->dumpit && link->dumpit != dumpit);
214 link->dumpit = dumpit;
216 link->flags |= flags;
218 /* publish protocol:msgtype */
219 rcu_assign_pointer(tab[msgindex], link);
229 * rtnl_register_module - Register a rtnetlink message type
231 * @owner: module registering the hook (THIS_MODULE)
232 * @protocol: Protocol family or PF_UNSPEC
233 * @msgtype: rtnetlink message type
234 * @doit: Function pointer called for each request message
235 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
236 * @flags: rtnl_link_flags to modifiy behaviour of doit/dumpit functions
238 * Like rtnl_register, but for use by removable modules.
240 int rtnl_register_module(struct module *owner,
241 int protocol, int msgtype,
242 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
245 return rtnl_register_internal(owner, protocol, msgtype,
246 doit, dumpit, flags);
248 EXPORT_SYMBOL_GPL(rtnl_register_module);
251 * rtnl_register - Register a rtnetlink message type
252 * @protocol: Protocol family or PF_UNSPEC
253 * @msgtype: rtnetlink message type
254 * @doit: Function pointer called for each request message
255 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
256 * @flags: rtnl_link_flags to modifiy behaviour of doit/dumpit functions
258 * Registers the specified function pointers (at least one of them has
259 * to be non-NULL) to be called whenever a request message for the
260 * specified protocol family and message type is received.
262 * The special protocol family PF_UNSPEC may be used to define fallback
263 * function pointers for the case when no entry for the specific protocol
266 void rtnl_register(int protocol, int msgtype,
267 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
272 err = rtnl_register_internal(NULL, protocol, msgtype, doit, dumpit,
275 pr_err("Unable to register rtnetlink message handler, "
276 "protocol = %d, message type = %d\n", protocol, msgtype);
280 * rtnl_unregister - Unregister a rtnetlink message type
281 * @protocol: Protocol family or PF_UNSPEC
282 * @msgtype: rtnetlink message type
284 * Returns 0 on success or a negative error code.
286 int rtnl_unregister(int protocol, int msgtype)
288 struct rtnl_link **tab, *link;
291 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
292 msgindex = rtm_msgindex(msgtype);
295 tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
301 link = tab[msgindex];
302 rcu_assign_pointer(tab[msgindex], NULL);
305 kfree_rcu(link, rcu);
309 EXPORT_SYMBOL_GPL(rtnl_unregister);
312 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
313 * @protocol : Protocol family or PF_UNSPEC
315 * Identical to calling rtnl_unregster() for all registered message types
316 * of a certain protocol family.
318 void rtnl_unregister_all(int protocol)
320 struct rtnl_link **tab, *link;
323 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
326 tab = rtnl_msg_handlers[protocol];
327 RCU_INIT_POINTER(rtnl_msg_handlers[protocol], NULL);
328 for (msgindex = 0; msgindex < RTM_NR_MSGTYPES; msgindex++) {
329 link = tab[msgindex];
333 rcu_assign_pointer(tab[msgindex], NULL);
334 kfree_rcu(link, rcu);
342 EXPORT_SYMBOL_GPL(rtnl_unregister_all);
344 static LIST_HEAD(link_ops);
346 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
348 const struct rtnl_link_ops *ops;
350 list_for_each_entry(ops, &link_ops, list) {
351 if (!strcmp(ops->kind, kind))
358 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
359 * @ops: struct rtnl_link_ops * to register
361 * The caller must hold the rtnl_mutex. This function should be used
362 * by drivers that create devices during module initialization. It
363 * must be called before registering the devices.
365 * Returns 0 on success or a negative error code.
367 int __rtnl_link_register(struct rtnl_link_ops *ops)
369 if (rtnl_link_ops_get(ops->kind))
372 /* The check for setup is here because if ops
373 * does not have that filled up, it is not possible
374 * to use the ops for creating device. So do not
375 * fill up dellink as well. That disables rtnl_dellink.
377 if (ops->setup && !ops->dellink)
378 ops->dellink = unregister_netdevice_queue;
380 list_add_tail(&ops->list, &link_ops);
383 EXPORT_SYMBOL_GPL(__rtnl_link_register);
386 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
387 * @ops: struct rtnl_link_ops * to register
389 * Returns 0 on success or a negative error code.
391 int rtnl_link_register(struct rtnl_link_ops *ops)
395 /* Sanity-check max sizes to avoid stack buffer overflow. */
396 if (WARN_ON(ops->maxtype > RTNL_MAX_TYPE ||
397 ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE))
401 err = __rtnl_link_register(ops);
405 EXPORT_SYMBOL_GPL(rtnl_link_register);
407 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
409 struct net_device *dev;
410 LIST_HEAD(list_kill);
412 for_each_netdev(net, dev) {
413 if (dev->rtnl_link_ops == ops)
414 ops->dellink(dev, &list_kill);
416 unregister_netdevice_many(&list_kill);
420 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
421 * @ops: struct rtnl_link_ops * to unregister
423 * The caller must hold the rtnl_mutex and guarantee net_namespace_list
424 * integrity (hold pernet_ops_rwsem for writing to close the race
425 * with setup_net() and cleanup_net()).
427 void __rtnl_link_unregister(struct rtnl_link_ops *ops)
432 __rtnl_kill_links(net, ops);
434 list_del(&ops->list);
436 EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
438 /* Return with the rtnl_lock held when there are no network
439 * devices unregistering in any network namespace.
441 static void rtnl_lock_unregistering_all(void)
445 DEFINE_WAIT_FUNC(wait, woken_wake_function);
447 add_wait_queue(&netdev_unregistering_wq, &wait);
449 unregistering = false;
451 /* We held write locked pernet_ops_rwsem, and parallel
452 * setup_net() and cleanup_net() are not possible.
455 if (net->dev_unreg_count > 0) {
456 unregistering = true;
464 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
466 remove_wait_queue(&netdev_unregistering_wq, &wait);
470 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
471 * @ops: struct rtnl_link_ops * to unregister
473 void rtnl_link_unregister(struct rtnl_link_ops *ops)
475 /* Close the race with setup_net() and cleanup_net() */
476 down_write(&pernet_ops_rwsem);
477 rtnl_lock_unregistering_all();
478 __rtnl_link_unregister(ops);
480 up_write(&pernet_ops_rwsem);
482 EXPORT_SYMBOL_GPL(rtnl_link_unregister);
484 static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
486 struct net_device *master_dev;
487 const struct rtnl_link_ops *ops;
492 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
496 ops = master_dev->rtnl_link_ops;
497 if (!ops || !ops->get_slave_size)
499 /* IFLA_INFO_SLAVE_DATA + nested data */
500 size = nla_total_size(sizeof(struct nlattr)) +
501 ops->get_slave_size(master_dev, dev);
508 static size_t rtnl_link_get_size(const struct net_device *dev)
510 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
516 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
517 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
520 /* IFLA_INFO_DATA + nested data */
521 size += nla_total_size(sizeof(struct nlattr)) +
524 if (ops->get_xstats_size)
525 /* IFLA_INFO_XSTATS */
526 size += nla_total_size(ops->get_xstats_size(dev));
528 size += rtnl_link_get_slave_info_data_size(dev);
533 static LIST_HEAD(rtnl_af_ops);
535 static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
537 const struct rtnl_af_ops *ops;
539 list_for_each_entry_rcu(ops, &rtnl_af_ops, list) {
540 if (ops->family == family)
548 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
549 * @ops: struct rtnl_af_ops * to register
551 * Returns 0 on success or a negative error code.
553 void rtnl_af_register(struct rtnl_af_ops *ops)
556 list_add_tail_rcu(&ops->list, &rtnl_af_ops);
559 EXPORT_SYMBOL_GPL(rtnl_af_register);
562 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
563 * @ops: struct rtnl_af_ops * to unregister
565 void rtnl_af_unregister(struct rtnl_af_ops *ops)
568 list_del_rcu(&ops->list);
573 EXPORT_SYMBOL_GPL(rtnl_af_unregister);
575 static size_t rtnl_link_get_af_size(const struct net_device *dev,
578 struct rtnl_af_ops *af_ops;
582 size = nla_total_size(sizeof(struct nlattr));
585 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
586 if (af_ops->get_link_af_size) {
587 /* AF_* + nested data */
588 size += nla_total_size(sizeof(struct nlattr)) +
589 af_ops->get_link_af_size(dev, ext_filter_mask);
597 static bool rtnl_have_link_slave_info(const struct net_device *dev)
599 struct net_device *master_dev;
604 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
605 if (master_dev && master_dev->rtnl_link_ops)
611 static int rtnl_link_slave_info_fill(struct sk_buff *skb,
612 const struct net_device *dev)
614 struct net_device *master_dev;
615 const struct rtnl_link_ops *ops;
616 struct nlattr *slave_data;
619 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
622 ops = master_dev->rtnl_link_ops;
625 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
627 if (ops->fill_slave_info) {
628 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
631 err = ops->fill_slave_info(skb, master_dev, dev);
633 goto err_cancel_slave_data;
634 nla_nest_end(skb, slave_data);
638 err_cancel_slave_data:
639 nla_nest_cancel(skb, slave_data);
643 static int rtnl_link_info_fill(struct sk_buff *skb,
644 const struct net_device *dev)
646 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
652 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
654 if (ops->fill_xstats) {
655 err = ops->fill_xstats(skb, dev);
659 if (ops->fill_info) {
660 data = nla_nest_start(skb, IFLA_INFO_DATA);
663 err = ops->fill_info(skb, dev);
665 goto err_cancel_data;
666 nla_nest_end(skb, data);
671 nla_nest_cancel(skb, data);
675 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
677 struct nlattr *linkinfo;
680 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
681 if (linkinfo == NULL)
684 err = rtnl_link_info_fill(skb, dev);
686 goto err_cancel_link;
688 err = rtnl_link_slave_info_fill(skb, dev);
690 goto err_cancel_link;
692 nla_nest_end(skb, linkinfo);
696 nla_nest_cancel(skb, linkinfo);
701 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
703 struct sock *rtnl = net->rtnl;
706 NETLINK_CB(skb).dst_group = group;
708 refcount_inc(&skb->users);
709 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
711 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
715 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
717 struct sock *rtnl = net->rtnl;
719 return nlmsg_unicast(rtnl, skb, pid);
721 EXPORT_SYMBOL(rtnl_unicast);
723 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
724 struct nlmsghdr *nlh, gfp_t flags)
726 struct sock *rtnl = net->rtnl;
730 report = nlmsg_report(nlh);
732 nlmsg_notify(rtnl, skb, pid, group, report, flags);
734 EXPORT_SYMBOL(rtnl_notify);
736 void rtnl_set_sk_err(struct net *net, u32 group, int error)
738 struct sock *rtnl = net->rtnl;
740 netlink_set_err(rtnl, 0, group, error);
742 EXPORT_SYMBOL(rtnl_set_sk_err);
744 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
749 mx = nla_nest_start(skb, RTA_METRICS);
753 for (i = 0; i < RTAX_MAX; i++) {
755 if (i == RTAX_CC_ALGO - 1) {
756 char tmp[TCP_CA_NAME_MAX], *name;
758 name = tcp_ca_get_name_by_key(metrics[i], tmp);
761 if (nla_put_string(skb, i + 1, name))
762 goto nla_put_failure;
763 } else if (i == RTAX_FEATURES - 1) {
764 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
768 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
769 if (nla_put_u32(skb, i + 1, user_features))
770 goto nla_put_failure;
772 if (nla_put_u32(skb, i + 1, metrics[i]))
773 goto nla_put_failure;
780 nla_nest_cancel(skb, mx);
784 return nla_nest_end(skb, mx);
787 nla_nest_cancel(skb, mx);
790 EXPORT_SYMBOL(rtnetlink_put_metrics);
792 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
793 long expires, u32 error)
795 struct rta_cacheinfo ci = {
801 ci.rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse);
802 ci.rta_used = dst->__use;
803 ci.rta_clntref = atomic_read(&dst->__refcnt);
808 clock = jiffies_to_clock_t(abs(expires));
809 clock = min_t(unsigned long, clock, INT_MAX);
810 ci.rta_expires = (expires > 0) ? clock : -clock;
812 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
814 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
816 static void set_operstate(struct net_device *dev, unsigned char transition)
818 unsigned char operstate = dev->operstate;
820 switch (transition) {
822 if ((operstate == IF_OPER_DORMANT ||
823 operstate == IF_OPER_UNKNOWN) &&
825 operstate = IF_OPER_UP;
828 case IF_OPER_DORMANT:
829 if (operstate == IF_OPER_UP ||
830 operstate == IF_OPER_UNKNOWN)
831 operstate = IF_OPER_DORMANT;
835 if (dev->operstate != operstate) {
836 write_lock_bh(&dev_base_lock);
837 dev->operstate = operstate;
838 write_unlock_bh(&dev_base_lock);
839 netdev_state_change(dev);
843 static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
845 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
846 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
849 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
850 const struct ifinfomsg *ifm)
852 unsigned int flags = ifm->ifi_flags;
854 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
856 flags = (flags & ifm->ifi_change) |
857 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
862 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
863 const struct rtnl_link_stats64 *b)
865 a->rx_packets = b->rx_packets;
866 a->tx_packets = b->tx_packets;
867 a->rx_bytes = b->rx_bytes;
868 a->tx_bytes = b->tx_bytes;
869 a->rx_errors = b->rx_errors;
870 a->tx_errors = b->tx_errors;
871 a->rx_dropped = b->rx_dropped;
872 a->tx_dropped = b->tx_dropped;
874 a->multicast = b->multicast;
875 a->collisions = b->collisions;
877 a->rx_length_errors = b->rx_length_errors;
878 a->rx_over_errors = b->rx_over_errors;
879 a->rx_crc_errors = b->rx_crc_errors;
880 a->rx_frame_errors = b->rx_frame_errors;
881 a->rx_fifo_errors = b->rx_fifo_errors;
882 a->rx_missed_errors = b->rx_missed_errors;
884 a->tx_aborted_errors = b->tx_aborted_errors;
885 a->tx_carrier_errors = b->tx_carrier_errors;
886 a->tx_fifo_errors = b->tx_fifo_errors;
887 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
888 a->tx_window_errors = b->tx_window_errors;
890 a->rx_compressed = b->rx_compressed;
891 a->tx_compressed = b->tx_compressed;
893 a->rx_nohandler = b->rx_nohandler;
897 static inline int rtnl_vfinfo_size(const struct net_device *dev,
900 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) {
901 int num_vfs = dev_num_vf(dev->dev.parent);
902 size_t size = nla_total_size(0);
905 nla_total_size(sizeof(struct ifla_vf_mac)) +
906 nla_total_size(sizeof(struct ifla_vf_vlan)) +
907 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */
908 nla_total_size(MAX_VLAN_LIST_LEN *
909 sizeof(struct ifla_vf_vlan_info)) +
910 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
911 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
912 nla_total_size(sizeof(struct ifla_vf_rate)) +
913 nla_total_size(sizeof(struct ifla_vf_link_state)) +
914 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
915 nla_total_size(0) + /* nest IFLA_VF_STATS */
916 /* IFLA_VF_STATS_RX_PACKETS */
917 nla_total_size_64bit(sizeof(__u64)) +
918 /* IFLA_VF_STATS_TX_PACKETS */
919 nla_total_size_64bit(sizeof(__u64)) +
920 /* IFLA_VF_STATS_RX_BYTES */
921 nla_total_size_64bit(sizeof(__u64)) +
922 /* IFLA_VF_STATS_TX_BYTES */
923 nla_total_size_64bit(sizeof(__u64)) +
924 /* IFLA_VF_STATS_BROADCAST */
925 nla_total_size_64bit(sizeof(__u64)) +
926 /* IFLA_VF_STATS_MULTICAST */
927 nla_total_size_64bit(sizeof(__u64)) +
928 /* IFLA_VF_STATS_RX_DROPPED */
929 nla_total_size_64bit(sizeof(__u64)) +
930 /* IFLA_VF_STATS_TX_DROPPED */
931 nla_total_size_64bit(sizeof(__u64)) +
932 nla_total_size(sizeof(struct ifla_vf_trust)));
938 static size_t rtnl_port_size(const struct net_device *dev,
941 size_t port_size = nla_total_size(4) /* PORT_VF */
942 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
943 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
944 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
945 + nla_total_size(1) /* PROT_VDP_REQUEST */
946 + nla_total_size(2); /* PORT_VDP_RESPONSE */
947 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
948 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
950 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
953 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
954 !(ext_filter_mask & RTEXT_FILTER_VF))
956 if (dev_num_vf(dev->dev.parent))
957 return port_self_size + vf_ports_size +
958 vf_port_size * dev_num_vf(dev->dev.parent);
960 return port_self_size;
963 static size_t rtnl_xdp_size(void)
965 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */
966 nla_total_size(1) + /* XDP_ATTACHED */
967 nla_total_size(4); /* XDP_PROG_ID */
972 static noinline size_t if_nlmsg_size(const struct net_device *dev,
975 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
976 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
977 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
978 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
979 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
980 + nla_total_size(sizeof(struct rtnl_link_stats))
981 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
982 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
983 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
984 + nla_total_size(4) /* IFLA_TXQLEN */
985 + nla_total_size(4) /* IFLA_WEIGHT */
986 + nla_total_size(4) /* IFLA_MTU */
987 + nla_total_size(4) /* IFLA_LINK */
988 + nla_total_size(4) /* IFLA_MASTER */
989 + nla_total_size(1) /* IFLA_CARRIER */
990 + nla_total_size(4) /* IFLA_PROMISCUITY */
991 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
992 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
993 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
994 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
995 + nla_total_size(1) /* IFLA_OPERSTATE */
996 + nla_total_size(1) /* IFLA_LINKMODE */
997 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
998 + nla_total_size(4) /* IFLA_LINK_NETNSID */
999 + nla_total_size(4) /* IFLA_GROUP */
1000 + nla_total_size(ext_filter_mask
1001 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
1002 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
1003 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
1004 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
1005 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
1006 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
1007 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
1008 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
1009 + rtnl_xdp_size() /* IFLA_XDP */
1010 + nla_total_size(4) /* IFLA_EVENT */
1011 + nla_total_size(4) /* IFLA_NEW_NETNSID */
1012 + nla_total_size(4) /* IFLA_NEW_IFINDEX */
1013 + nla_total_size(1) /* IFLA_PROTO_DOWN */
1014 + nla_total_size(4) /* IFLA_IF_NETNSID */
1015 + nla_total_size(4) /* IFLA_CARRIER_UP_COUNT */
1016 + nla_total_size(4) /* IFLA_CARRIER_DOWN_COUNT */
1020 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
1022 struct nlattr *vf_ports;
1023 struct nlattr *vf_port;
1027 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
1031 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
1032 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
1034 goto nla_put_failure;
1035 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
1036 goto nla_put_failure;
1037 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
1038 if (err == -EMSGSIZE)
1039 goto nla_put_failure;
1041 nla_nest_cancel(skb, vf_port);
1044 nla_nest_end(skb, vf_port);
1047 nla_nest_end(skb, vf_ports);
1052 nla_nest_cancel(skb, vf_ports);
1056 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
1058 struct nlattr *port_self;
1061 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
1065 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
1067 nla_nest_cancel(skb, port_self);
1068 return (err == -EMSGSIZE) ? err : 0;
1071 nla_nest_end(skb, port_self);
1076 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1077 u32 ext_filter_mask)
1081 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1082 !(ext_filter_mask & RTEXT_FILTER_VF))
1085 err = rtnl_port_self_fill(skb, dev);
1089 if (dev_num_vf(dev->dev.parent)) {
1090 err = rtnl_vf_ports_fill(skb, dev);
1098 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1101 struct netdev_phys_item_id ppid;
1103 err = dev_get_phys_port_id(dev, &ppid);
1105 if (err == -EOPNOTSUPP)
1110 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1116 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1118 char name[IFNAMSIZ];
1121 err = dev_get_phys_port_name(dev, name, sizeof(name));
1123 if (err == -EOPNOTSUPP)
1128 if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
1134 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1137 struct switchdev_attr attr = {
1139 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
1140 .flags = SWITCHDEV_F_NO_RECURSE,
1143 err = switchdev_port_attr_get(dev, &attr);
1145 if (err == -EOPNOTSUPP)
1150 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1157 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1158 struct net_device *dev)
1160 struct rtnl_link_stats64 *sp;
1161 struct nlattr *attr;
1163 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1164 sizeof(struct rtnl_link_stats64), IFLA_PAD);
1168 sp = nla_data(attr);
1169 dev_get_stats(dev, sp);
1171 attr = nla_reserve(skb, IFLA_STATS,
1172 sizeof(struct rtnl_link_stats));
1176 copy_rtnl_link_stats(nla_data(attr), sp);
1181 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1182 struct net_device *dev,
1184 struct nlattr *vfinfo)
1186 struct ifla_vf_rss_query_en vf_rss_query_en;
1187 struct nlattr *vf, *vfstats, *vfvlanlist;
1188 struct ifla_vf_link_state vf_linkstate;
1189 struct ifla_vf_vlan_info vf_vlan_info;
1190 struct ifla_vf_spoofchk vf_spoofchk;
1191 struct ifla_vf_tx_rate vf_tx_rate;
1192 struct ifla_vf_stats vf_stats;
1193 struct ifla_vf_trust vf_trust;
1194 struct ifla_vf_vlan vf_vlan;
1195 struct ifla_vf_rate vf_rate;
1196 struct ifla_vf_mac vf_mac;
1197 struct ifla_vf_info ivi;
1199 memset(&ivi, 0, sizeof(ivi));
1201 /* Not all SR-IOV capable drivers support the
1202 * spoofcheck and "RSS query enable" query. Preset to
1203 * -1 so the user space tool can detect that the driver
1204 * didn't report anything.
1207 ivi.rss_query_en = -1;
1209 /* The default value for VF link state is "auto"
1210 * IFLA_VF_LINK_STATE_AUTO which equals zero
1213 /* VLAN Protocol by default is 802.1Q */
1214 ivi.vlan_proto = htons(ETH_P_8021Q);
1215 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1218 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
1227 vf_rss_query_en.vf =
1228 vf_trust.vf = ivi.vf;
1230 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1231 vf_vlan.vlan = ivi.vlan;
1232 vf_vlan.qos = ivi.qos;
1233 vf_vlan_info.vlan = ivi.vlan;
1234 vf_vlan_info.qos = ivi.qos;
1235 vf_vlan_info.vlan_proto = ivi.vlan_proto;
1236 vf_tx_rate.rate = ivi.max_tx_rate;
1237 vf_rate.min_tx_rate = ivi.min_tx_rate;
1238 vf_rate.max_tx_rate = ivi.max_tx_rate;
1239 vf_spoofchk.setting = ivi.spoofchk;
1240 vf_linkstate.link_state = ivi.linkstate;
1241 vf_rss_query_en.setting = ivi.rss_query_en;
1242 vf_trust.setting = ivi.trusted;
1243 vf = nla_nest_start(skb, IFLA_VF_INFO);
1245 goto nla_put_vfinfo_failure;
1246 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1247 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1248 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1250 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1252 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1254 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1256 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1257 sizeof(vf_rss_query_en),
1258 &vf_rss_query_en) ||
1259 nla_put(skb, IFLA_VF_TRUST,
1260 sizeof(vf_trust), &vf_trust))
1261 goto nla_put_vf_failure;
1262 vfvlanlist = nla_nest_start(skb, IFLA_VF_VLAN_LIST);
1264 goto nla_put_vf_failure;
1265 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1267 nla_nest_cancel(skb, vfvlanlist);
1268 goto nla_put_vf_failure;
1270 nla_nest_end(skb, vfvlanlist);
1271 memset(&vf_stats, 0, sizeof(vf_stats));
1272 if (dev->netdev_ops->ndo_get_vf_stats)
1273 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1275 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1277 goto nla_put_vf_failure;
1278 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1279 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1280 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1281 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1282 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1283 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1284 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1285 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1286 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1287 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1288 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
1289 vf_stats.multicast, IFLA_VF_STATS_PAD) ||
1290 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_DROPPED,
1291 vf_stats.rx_dropped, IFLA_VF_STATS_PAD) ||
1292 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_DROPPED,
1293 vf_stats.tx_dropped, IFLA_VF_STATS_PAD)) {
1294 nla_nest_cancel(skb, vfstats);
1295 goto nla_put_vf_failure;
1297 nla_nest_end(skb, vfstats);
1298 nla_nest_end(skb, vf);
1302 nla_nest_cancel(skb, vf);
1303 nla_put_vfinfo_failure:
1304 nla_nest_cancel(skb, vfinfo);
1308 static noinline_for_stack int rtnl_fill_vf(struct sk_buff *skb,
1309 struct net_device *dev,
1310 u32 ext_filter_mask)
1312 struct nlattr *vfinfo;
1315 if (!dev->dev.parent || ((ext_filter_mask & RTEXT_FILTER_VF) == 0))
1318 num_vfs = dev_num_vf(dev->dev.parent);
1319 if (nla_put_u32(skb, IFLA_NUM_VF, num_vfs))
1322 if (!dev->netdev_ops->ndo_get_vf_config)
1325 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1329 for (i = 0; i < num_vfs; i++) {
1330 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1334 nla_nest_end(skb, vfinfo);
1338 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1340 struct rtnl_link_ifmap map;
1342 memset(&map, 0, sizeof(map));
1343 map.mem_start = dev->mem_start;
1344 map.mem_end = dev->mem_end;
1345 map.base_addr = dev->base_addr;
1348 map.port = dev->if_port;
1350 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
1356 static u8 rtnl_xdp_attached_mode(struct net_device *dev, u32 *prog_id)
1358 const struct net_device_ops *ops = dev->netdev_ops;
1359 const struct bpf_prog *generic_xdp_prog;
1360 struct netdev_bpf xdp;
1365 generic_xdp_prog = rtnl_dereference(dev->xdp_prog);
1366 if (generic_xdp_prog) {
1367 *prog_id = generic_xdp_prog->aux->id;
1368 return XDP_ATTACHED_SKB;
1371 return XDP_ATTACHED_NONE;
1373 __dev_xdp_query(dev, ops->ndo_bpf, &xdp);
1374 *prog_id = xdp.prog_id;
1376 return xdp.prog_attached;
1379 static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1385 xdp = nla_nest_start(skb, IFLA_XDP);
1389 err = nla_put_u8(skb, IFLA_XDP_ATTACHED,
1390 rtnl_xdp_attached_mode(dev, &prog_id));
1395 err = nla_put_u32(skb, IFLA_XDP_PROG_ID, prog_id);
1400 nla_nest_end(skb, xdp);
1404 nla_nest_cancel(skb, xdp);
1408 static u32 rtnl_get_event(unsigned long event)
1410 u32 rtnl_event_type = IFLA_EVENT_NONE;
1414 rtnl_event_type = IFLA_EVENT_REBOOT;
1416 case NETDEV_FEAT_CHANGE:
1417 rtnl_event_type = IFLA_EVENT_FEATURES;
1419 case NETDEV_BONDING_FAILOVER:
1420 rtnl_event_type = IFLA_EVENT_BONDING_FAILOVER;
1422 case NETDEV_NOTIFY_PEERS:
1423 rtnl_event_type = IFLA_EVENT_NOTIFY_PEERS;
1425 case NETDEV_RESEND_IGMP:
1426 rtnl_event_type = IFLA_EVENT_IGMP_RESEND;
1428 case NETDEV_CHANGEINFODATA:
1429 rtnl_event_type = IFLA_EVENT_BONDING_OPTIONS;
1435 return rtnl_event_type;
1438 static int put_master_ifindex(struct sk_buff *skb, struct net_device *dev)
1440 const struct net_device *upper_dev;
1445 upper_dev = netdev_master_upper_dev_get_rcu(dev);
1447 ret = nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex);
1453 static int nla_put_iflink(struct sk_buff *skb, const struct net_device *dev)
1455 int ifindex = dev_get_iflink(dev);
1457 if (dev->ifindex == ifindex)
1460 return nla_put_u32(skb, IFLA_LINK, ifindex);
1463 static noinline_for_stack int nla_put_ifalias(struct sk_buff *skb,
1464 struct net_device *dev)
1469 ret = dev_get_alias(dev, buf, sizeof(buf));
1470 return ret > 0 ? nla_put_string(skb, IFLA_IFALIAS, buf) : 0;
1473 static int rtnl_fill_link_netnsid(struct sk_buff *skb,
1474 const struct net_device *dev,
1475 struct net *src_net)
1477 if (dev->rtnl_link_ops && dev->rtnl_link_ops->get_link_net) {
1478 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1480 if (!net_eq(dev_net(dev), link_net)) {
1481 int id = peernet2id_alloc(src_net, link_net);
1483 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1491 static int rtnl_fill_link_af(struct sk_buff *skb,
1492 const struct net_device *dev,
1493 u32 ext_filter_mask)
1495 const struct rtnl_af_ops *af_ops;
1496 struct nlattr *af_spec;
1498 af_spec = nla_nest_start(skb, IFLA_AF_SPEC);
1502 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
1506 if (!af_ops->fill_link_af)
1509 af = nla_nest_start(skb, af_ops->family);
1513 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1515 * Caller may return ENODATA to indicate that there
1516 * was no data to be dumped. This is not an error, it
1517 * means we should trim the attribute header and
1520 if (err == -ENODATA)
1521 nla_nest_cancel(skb, af);
1525 nla_nest_end(skb, af);
1528 nla_nest_end(skb, af_spec);
1532 static int rtnl_fill_ifinfo(struct sk_buff *skb,
1533 struct net_device *dev, struct net *src_net,
1534 int type, u32 pid, u32 seq, u32 change,
1535 unsigned int flags, u32 ext_filter_mask,
1536 u32 event, int *new_nsid, int new_ifindex,
1539 struct ifinfomsg *ifm;
1540 struct nlmsghdr *nlh;
1543 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1547 ifm = nlmsg_data(nlh);
1548 ifm->ifi_family = AF_UNSPEC;
1550 ifm->ifi_type = dev->type;
1551 ifm->ifi_index = dev->ifindex;
1552 ifm->ifi_flags = dev_get_flags(dev);
1553 ifm->ifi_change = change;
1555 if (tgt_netnsid >= 0 && nla_put_s32(skb, IFLA_IF_NETNSID, tgt_netnsid))
1556 goto nla_put_failure;
1558 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1559 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1560 nla_put_u8(skb, IFLA_OPERSTATE,
1561 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1562 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1563 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1564 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1565 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
1566 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1567 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1568 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1570 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1572 nla_put_iflink(skb, dev) ||
1573 put_master_ifindex(skb, dev) ||
1574 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1576 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1577 nla_put_ifalias(skb, dev) ||
1578 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1579 atomic_read(&dev->carrier_up_count) +
1580 atomic_read(&dev->carrier_down_count)) ||
1581 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down) ||
1582 nla_put_u32(skb, IFLA_CARRIER_UP_COUNT,
1583 atomic_read(&dev->carrier_up_count)) ||
1584 nla_put_u32(skb, IFLA_CARRIER_DOWN_COUNT,
1585 atomic_read(&dev->carrier_down_count)))
1586 goto nla_put_failure;
1588 if (event != IFLA_EVENT_NONE) {
1589 if (nla_put_u32(skb, IFLA_EVENT, event))
1590 goto nla_put_failure;
1593 if (rtnl_fill_link_ifmap(skb, dev))
1594 goto nla_put_failure;
1596 if (dev->addr_len) {
1597 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1598 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1599 goto nla_put_failure;
1602 if (rtnl_phys_port_id_fill(skb, dev))
1603 goto nla_put_failure;
1605 if (rtnl_phys_port_name_fill(skb, dev))
1606 goto nla_put_failure;
1608 if (rtnl_phys_switch_id_fill(skb, dev))
1609 goto nla_put_failure;
1611 if (rtnl_fill_stats(skb, dev))
1612 goto nla_put_failure;
1614 if (rtnl_fill_vf(skb, dev, ext_filter_mask))
1615 goto nla_put_failure;
1617 if (rtnl_port_fill(skb, dev, ext_filter_mask))
1618 goto nla_put_failure;
1620 if (rtnl_xdp_fill(skb, dev))
1621 goto nla_put_failure;
1623 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1624 if (rtnl_link_fill(skb, dev) < 0)
1625 goto nla_put_failure;
1628 if (rtnl_fill_link_netnsid(skb, dev, src_net))
1629 goto nla_put_failure;
1632 nla_put_s32(skb, IFLA_NEW_NETNSID, *new_nsid) < 0)
1633 goto nla_put_failure;
1635 nla_put_s32(skb, IFLA_NEW_IFINDEX, new_ifindex) < 0)
1636 goto nla_put_failure;
1640 if (rtnl_fill_link_af(skb, dev, ext_filter_mask))
1641 goto nla_put_failure_rcu;
1644 nlmsg_end(skb, nlh);
1647 nla_put_failure_rcu:
1650 nlmsg_cancel(skb, nlh);
1654 static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1655 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1656 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1657 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1658 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1659 [IFLA_MTU] = { .type = NLA_U32 },
1660 [IFLA_LINK] = { .type = NLA_U32 },
1661 [IFLA_MASTER] = { .type = NLA_U32 },
1662 [IFLA_CARRIER] = { .type = NLA_U8 },
1663 [IFLA_TXQLEN] = { .type = NLA_U32 },
1664 [IFLA_WEIGHT] = { .type = NLA_U32 },
1665 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1666 [IFLA_LINKMODE] = { .type = NLA_U8 },
1667 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1668 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1669 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1670 /* IFLA_IFALIAS is a string, but policy is set to NLA_BINARY to
1671 * allow 0-length string (needed to remove an alias).
1673 [IFLA_IFALIAS] = { .type = NLA_BINARY, .len = IFALIASZ - 1 },
1674 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1675 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1676 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1677 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1678 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1679 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1680 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1681 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1682 [IFLA_GSO_MAX_SEGS] = { .type = NLA_U32 },
1683 [IFLA_GSO_MAX_SIZE] = { .type = NLA_U32 },
1684 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1685 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
1686 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1687 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
1688 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
1689 [IFLA_XDP] = { .type = NLA_NESTED },
1690 [IFLA_EVENT] = { .type = NLA_U32 },
1691 [IFLA_GROUP] = { .type = NLA_U32 },
1692 [IFLA_IF_NETNSID] = { .type = NLA_S32 },
1693 [IFLA_CARRIER_UP_COUNT] = { .type = NLA_U32 },
1694 [IFLA_CARRIER_DOWN_COUNT] = { .type = NLA_U32 },
1697 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1698 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1699 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1700 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1701 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
1704 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1705 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1706 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1707 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
1708 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1709 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1710 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1711 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
1712 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
1713 [IFLA_VF_STATS] = { .type = NLA_NESTED },
1714 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
1715 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1716 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1719 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1720 [IFLA_PORT_VF] = { .type = NLA_U32 },
1721 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1722 .len = PORT_PROFILE_MAX },
1723 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1724 .len = PORT_UUID_MAX },
1725 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1726 .len = PORT_UUID_MAX },
1727 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1728 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1730 /* Unused, but we need to keep it here since user space could
1731 * fill it. It's also broken with regard to NLA_BINARY use in
1732 * combination with structs.
1734 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1735 .len = sizeof(struct ifla_port_vsi) },
1738 static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
1739 [IFLA_XDP_FD] = { .type = NLA_S32 },
1740 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
1741 [IFLA_XDP_FLAGS] = { .type = NLA_U32 },
1742 [IFLA_XDP_PROG_ID] = { .type = NLA_U32 },
1745 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1747 const struct rtnl_link_ops *ops = NULL;
1748 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1750 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla,
1751 ifla_info_policy, NULL) < 0)
1754 if (linfo[IFLA_INFO_KIND]) {
1755 char kind[MODULE_NAME_LEN];
1757 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1758 ops = rtnl_link_ops_get(kind);
1764 static bool link_master_filtered(struct net_device *dev, int master_idx)
1766 struct net_device *master;
1771 master = netdev_master_upper_dev_get(dev);
1772 if (!master || master->ifindex != master_idx)
1778 static bool link_kind_filtered(const struct net_device *dev,
1779 const struct rtnl_link_ops *kind_ops)
1781 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1787 static bool link_dump_filtered(struct net_device *dev,
1789 const struct rtnl_link_ops *kind_ops)
1791 if (link_master_filtered(dev, master_idx) ||
1792 link_kind_filtered(dev, kind_ops))
1798 static struct net *get_target_net(struct sock *sk, int netnsid)
1802 net = get_net_ns_by_id(sock_net(sk), netnsid);
1804 return ERR_PTR(-EINVAL);
1806 /* For now, the caller is required to have CAP_NET_ADMIN in
1807 * the user namespace owning the target net ns.
1809 if (!sk_ns_capable(sk, net->user_ns, CAP_NET_ADMIN)) {
1811 return ERR_PTR(-EACCES);
1816 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1818 struct net *net = sock_net(skb->sk);
1819 struct net *tgt_net = net;
1822 struct net_device *dev;
1823 struct hlist_head *head;
1824 struct nlattr *tb[IFLA_MAX+1];
1825 u32 ext_filter_mask = 0;
1826 const struct rtnl_link_ops *kind_ops = NULL;
1827 unsigned int flags = NLM_F_MULTI;
1834 s_idx = cb->args[1];
1836 /* A hack to preserve kernel<->userspace interface.
1837 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1838 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1839 * what iproute2 < v3.9.0 used.
1840 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1841 * attribute, its netlink message is shorter than struct ifinfomsg.
1843 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1844 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1846 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX,
1847 ifla_policy, NULL) >= 0) {
1848 if (tb[IFLA_IF_NETNSID]) {
1849 netnsid = nla_get_s32(tb[IFLA_IF_NETNSID]);
1850 tgt_net = get_target_net(skb->sk, netnsid);
1851 if (IS_ERR(tgt_net)) {
1857 if (tb[IFLA_EXT_MASK])
1858 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1860 if (tb[IFLA_MASTER])
1861 master_idx = nla_get_u32(tb[IFLA_MASTER]);
1863 if (tb[IFLA_LINKINFO])
1864 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
1866 if (master_idx || kind_ops)
1867 flags |= NLM_F_DUMP_FILTERED;
1870 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1872 head = &tgt_net->dev_index_head[h];
1873 hlist_for_each_entry(dev, head, index_hlist) {
1874 if (link_dump_filtered(dev, master_idx, kind_ops))
1878 err = rtnl_fill_ifinfo(skb, dev, net,
1880 NETLINK_CB(cb->skb).portid,
1881 cb->nlh->nlmsg_seq, 0,
1883 ext_filter_mask, 0, NULL, 0,
1887 if (likely(skb->len))
1901 cb->seq = net->dev_base_seq;
1902 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1909 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
1910 struct netlink_ext_ack *exterr)
1912 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy, exterr);
1914 EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1916 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1919 /* Examine the link attributes and figure out which
1920 * network namespace we are talking about.
1922 if (tb[IFLA_NET_NS_PID])
1923 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1924 else if (tb[IFLA_NET_NS_FD])
1925 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1927 net = get_net(src_net);
1930 EXPORT_SYMBOL(rtnl_link_get_net);
1932 /* Figure out which network namespace we are talking about by
1933 * examining the link attributes in the following order:
1935 * 1. IFLA_NET_NS_PID
1937 * 3. IFLA_IF_NETNSID
1939 static struct net *rtnl_link_get_net_by_nlattr(struct net *src_net,
1940 struct nlattr *tb[])
1944 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD])
1945 return rtnl_link_get_net(src_net, tb);
1947 if (!tb[IFLA_IF_NETNSID])
1948 return get_net(src_net);
1950 net = get_net_ns_by_id(src_net, nla_get_u32(tb[IFLA_IF_NETNSID]));
1952 return ERR_PTR(-EINVAL);
1957 static struct net *rtnl_link_get_net_capable(const struct sk_buff *skb,
1958 struct net *src_net,
1959 struct nlattr *tb[], int cap)
1963 net = rtnl_link_get_net_by_nlattr(src_net, tb);
1967 if (!netlink_ns_capable(skb, net->user_ns, cap)) {
1969 return ERR_PTR(-EPERM);
1975 /* Verify that rtnetlink requests do not pass additional properties
1976 * potentially referring to different network namespaces.
1978 static int rtnl_ensure_unique_netns(struct nlattr *tb[],
1979 struct netlink_ext_ack *extack,
1983 if (netns_id_only) {
1984 if (!tb[IFLA_NET_NS_PID] && !tb[IFLA_NET_NS_FD])
1987 NL_SET_ERR_MSG(extack, "specified netns attribute not supported");
1991 if (tb[IFLA_IF_NETNSID] && (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]))
1994 if (tb[IFLA_NET_NS_PID] && (tb[IFLA_IF_NETNSID] || tb[IFLA_NET_NS_FD]))
1997 if (tb[IFLA_NET_NS_FD] && (tb[IFLA_IF_NETNSID] || tb[IFLA_NET_NS_PID]))
2003 NL_SET_ERR_MSG(extack, "multiple netns identifying attributes specified");
2007 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
2010 if (tb[IFLA_ADDRESS] &&
2011 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
2014 if (tb[IFLA_BROADCAST] &&
2015 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
2019 if (tb[IFLA_AF_SPEC]) {
2023 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2024 const struct rtnl_af_ops *af_ops;
2027 af_ops = rtnl_af_lookup(nla_type(af));
2030 return -EAFNOSUPPORT;
2033 if (!af_ops->set_link_af) {
2038 if (af_ops->validate_link_af) {
2039 err = af_ops->validate_link_af(dev, af);
2053 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
2056 const struct net_device_ops *ops = dev->netdev_ops;
2058 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
2061 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
2063 if (dev->type != ARPHRD_INFINIBAND)
2066 return handle_infiniband_guid(dev, ivt, guid_type);
2069 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
2071 const struct net_device_ops *ops = dev->netdev_ops;
2074 if (tb[IFLA_VF_MAC]) {
2075 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
2078 if (ops->ndo_set_vf_mac)
2079 err = ops->ndo_set_vf_mac(dev, ivm->vf,
2085 if (tb[IFLA_VF_VLAN]) {
2086 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
2089 if (ops->ndo_set_vf_vlan)
2090 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
2092 htons(ETH_P_8021Q));
2097 if (tb[IFLA_VF_VLAN_LIST]) {
2098 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
2099 struct nlattr *attr;
2103 if (!ops->ndo_set_vf_vlan)
2106 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
2107 if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
2108 nla_len(attr) < NLA_HDRLEN) {
2111 if (len >= MAX_VLAN_LIST_LEN)
2113 ivvl[len] = nla_data(attr);
2120 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
2121 ivvl[0]->qos, ivvl[0]->vlan_proto);
2126 if (tb[IFLA_VF_TX_RATE]) {
2127 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
2128 struct ifla_vf_info ivf;
2131 if (ops->ndo_get_vf_config)
2132 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
2137 if (ops->ndo_set_vf_rate)
2138 err = ops->ndo_set_vf_rate(dev, ivt->vf,
2145 if (tb[IFLA_VF_RATE]) {
2146 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
2149 if (ops->ndo_set_vf_rate)
2150 err = ops->ndo_set_vf_rate(dev, ivt->vf,
2157 if (tb[IFLA_VF_SPOOFCHK]) {
2158 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
2161 if (ops->ndo_set_vf_spoofchk)
2162 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
2168 if (tb[IFLA_VF_LINK_STATE]) {
2169 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
2172 if (ops->ndo_set_vf_link_state)
2173 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
2179 if (tb[IFLA_VF_RSS_QUERY_EN]) {
2180 struct ifla_vf_rss_query_en *ivrssq_en;
2183 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
2184 if (ops->ndo_set_vf_rss_query_en)
2185 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
2186 ivrssq_en->setting);
2191 if (tb[IFLA_VF_TRUST]) {
2192 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
2195 if (ops->ndo_set_vf_trust)
2196 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
2201 if (tb[IFLA_VF_IB_NODE_GUID]) {
2202 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
2204 if (!ops->ndo_set_vf_guid)
2207 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
2210 if (tb[IFLA_VF_IB_PORT_GUID]) {
2211 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
2213 if (!ops->ndo_set_vf_guid)
2216 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
2222 static int do_set_master(struct net_device *dev, int ifindex,
2223 struct netlink_ext_ack *extack)
2225 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
2226 const struct net_device_ops *ops;
2230 if (upper_dev->ifindex == ifindex)
2232 ops = upper_dev->netdev_ops;
2233 if (ops->ndo_del_slave) {
2234 err = ops->ndo_del_slave(upper_dev, dev);
2243 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
2246 ops = upper_dev->netdev_ops;
2247 if (ops->ndo_add_slave) {
2248 err = ops->ndo_add_slave(upper_dev, dev, extack);
2258 #define DO_SETLINK_MODIFIED 0x01
2259 /* notify flag means notify + modified. */
2260 #define DO_SETLINK_NOTIFY 0x03
2261 static int do_setlink(const struct sk_buff *skb,
2262 struct net_device *dev, struct ifinfomsg *ifm,
2263 struct netlink_ext_ack *extack,
2264 struct nlattr **tb, char *ifname, int status)
2266 const struct net_device_ops *ops = dev->netdev_ops;
2269 err = validate_linkmsg(dev, tb);
2273 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD] || tb[IFLA_IF_NETNSID]) {
2274 struct net *net = rtnl_link_get_net_capable(skb, dev_net(dev),
2281 err = dev_change_net_namespace(dev, net, ifname);
2285 status |= DO_SETLINK_MODIFIED;
2289 struct rtnl_link_ifmap *u_map;
2292 if (!ops->ndo_set_config) {
2297 if (!netif_device_present(dev)) {
2302 u_map = nla_data(tb[IFLA_MAP]);
2303 k_map.mem_start = (unsigned long) u_map->mem_start;
2304 k_map.mem_end = (unsigned long) u_map->mem_end;
2305 k_map.base_addr = (unsigned short) u_map->base_addr;
2306 k_map.irq = (unsigned char) u_map->irq;
2307 k_map.dma = (unsigned char) u_map->dma;
2308 k_map.port = (unsigned char) u_map->port;
2310 err = ops->ndo_set_config(dev, &k_map);
2314 status |= DO_SETLINK_NOTIFY;
2317 if (tb[IFLA_ADDRESS]) {
2318 struct sockaddr *sa;
2321 len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len,
2323 sa = kmalloc(len, GFP_KERNEL);
2328 sa->sa_family = dev->type;
2329 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
2331 err = dev_set_mac_address(dev, sa);
2335 status |= DO_SETLINK_MODIFIED;
2339 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
2342 status |= DO_SETLINK_MODIFIED;
2345 if (tb[IFLA_GROUP]) {
2346 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2347 status |= DO_SETLINK_NOTIFY;
2351 * Interface selected by interface index but interface
2352 * name provided implies that a name change has been
2355 if (ifm->ifi_index > 0 && ifname[0]) {
2356 err = dev_change_name(dev, ifname);
2359 status |= DO_SETLINK_MODIFIED;
2362 if (tb[IFLA_IFALIAS]) {
2363 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2364 nla_len(tb[IFLA_IFALIAS]));
2367 status |= DO_SETLINK_NOTIFY;
2370 if (tb[IFLA_BROADCAST]) {
2371 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
2372 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
2375 if (ifm->ifi_flags || ifm->ifi_change) {
2376 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2381 if (tb[IFLA_MASTER]) {
2382 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
2385 status |= DO_SETLINK_MODIFIED;
2388 if (tb[IFLA_CARRIER]) {
2389 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2392 status |= DO_SETLINK_MODIFIED;
2395 if (tb[IFLA_TXQLEN]) {
2396 unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]);
2398 err = dev_change_tx_queue_len(dev, value);
2401 status |= DO_SETLINK_MODIFIED;
2404 if (tb[IFLA_GSO_MAX_SIZE]) {
2405 u32 max_size = nla_get_u32(tb[IFLA_GSO_MAX_SIZE]);
2407 if (max_size > GSO_MAX_SIZE) {
2412 if (dev->gso_max_size ^ max_size) {
2413 netif_set_gso_max_size(dev, max_size);
2414 status |= DO_SETLINK_MODIFIED;
2418 if (tb[IFLA_GSO_MAX_SEGS]) {
2419 u32 max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
2421 if (max_segs > GSO_MAX_SEGS) {
2426 if (dev->gso_max_segs ^ max_segs) {
2427 dev->gso_max_segs = max_segs;
2428 status |= DO_SETLINK_MODIFIED;
2432 if (tb[IFLA_OPERSTATE])
2433 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2435 if (tb[IFLA_LINKMODE]) {
2436 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2438 write_lock_bh(&dev_base_lock);
2439 if (dev->link_mode ^ value)
2440 status |= DO_SETLINK_NOTIFY;
2441 dev->link_mode = value;
2442 write_unlock_bh(&dev_base_lock);
2445 if (tb[IFLA_VFINFO_LIST]) {
2446 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
2447 struct nlattr *attr;
2450 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
2451 if (nla_type(attr) != IFLA_VF_INFO ||
2452 nla_len(attr) < NLA_HDRLEN) {
2456 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
2457 ifla_vf_policy, NULL);
2460 err = do_setvfinfo(dev, vfinfo);
2463 status |= DO_SETLINK_NOTIFY;
2468 if (tb[IFLA_VF_PORTS]) {
2469 struct nlattr *port[IFLA_PORT_MAX+1];
2470 struct nlattr *attr;
2475 if (!ops->ndo_set_vf_port)
2478 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
2479 if (nla_type(attr) != IFLA_VF_PORT ||
2480 nla_len(attr) < NLA_HDRLEN) {
2484 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
2485 ifla_port_policy, NULL);
2488 if (!port[IFLA_PORT_VF]) {
2492 vf = nla_get_u32(port[IFLA_PORT_VF]);
2493 err = ops->ndo_set_vf_port(dev, vf, port);
2496 status |= DO_SETLINK_NOTIFY;
2501 if (tb[IFLA_PORT_SELF]) {
2502 struct nlattr *port[IFLA_PORT_MAX+1];
2504 err = nla_parse_nested(port, IFLA_PORT_MAX,
2505 tb[IFLA_PORT_SELF], ifla_port_policy,
2511 if (ops->ndo_set_vf_port)
2512 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2515 status |= DO_SETLINK_NOTIFY;
2518 if (tb[IFLA_AF_SPEC]) {
2522 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2523 const struct rtnl_af_ops *af_ops;
2527 BUG_ON(!(af_ops = rtnl_af_lookup(nla_type(af))));
2529 err = af_ops->set_link_af(dev, af);
2536 status |= DO_SETLINK_NOTIFY;
2541 if (tb[IFLA_PROTO_DOWN]) {
2542 err = dev_change_proto_down(dev,
2543 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2546 status |= DO_SETLINK_NOTIFY;
2550 struct nlattr *xdp[IFLA_XDP_MAX + 1];
2553 err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP],
2554 ifla_xdp_policy, NULL);
2558 if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) {
2563 if (xdp[IFLA_XDP_FLAGS]) {
2564 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
2565 if (xdp_flags & ~XDP_FLAGS_MASK) {
2569 if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) {
2575 if (xdp[IFLA_XDP_FD]) {
2576 err = dev_change_xdp_fd(dev, extack,
2577 nla_get_s32(xdp[IFLA_XDP_FD]),
2581 status |= DO_SETLINK_NOTIFY;
2586 if (status & DO_SETLINK_MODIFIED) {
2587 if ((status & DO_SETLINK_NOTIFY) == DO_SETLINK_NOTIFY)
2588 netdev_state_change(dev);
2591 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",
2598 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2599 struct netlink_ext_ack *extack)
2601 struct net *net = sock_net(skb->sk);
2602 struct ifinfomsg *ifm;
2603 struct net_device *dev;
2605 struct nlattr *tb[IFLA_MAX+1];
2606 char ifname[IFNAMSIZ];
2608 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy,
2613 err = rtnl_ensure_unique_netns(tb, extack, false);
2617 if (tb[IFLA_IFNAME])
2618 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2623 ifm = nlmsg_data(nlh);
2624 if (ifm->ifi_index > 0)
2625 dev = __dev_get_by_index(net, ifm->ifi_index);
2626 else if (tb[IFLA_IFNAME])
2627 dev = __dev_get_by_name(net, ifname);
2636 err = do_setlink(skb, dev, ifm, extack, tb, ifname, 0);
2641 static int rtnl_group_dellink(const struct net *net, int group)
2643 struct net_device *dev, *aux;
2644 LIST_HEAD(list_kill);
2650 for_each_netdev(net, dev) {
2651 if (dev->group == group) {
2652 const struct rtnl_link_ops *ops;
2655 ops = dev->rtnl_link_ops;
2656 if (!ops || !ops->dellink)
2664 for_each_netdev_safe(net, dev, aux) {
2665 if (dev->group == group) {
2666 const struct rtnl_link_ops *ops;
2668 ops = dev->rtnl_link_ops;
2669 ops->dellink(dev, &list_kill);
2672 unregister_netdevice_many(&list_kill);
2677 int rtnl_delete_link(struct net_device *dev)
2679 const struct rtnl_link_ops *ops;
2680 LIST_HEAD(list_kill);
2682 ops = dev->rtnl_link_ops;
2683 if (!ops || !ops->dellink)
2686 ops->dellink(dev, &list_kill);
2687 unregister_netdevice_many(&list_kill);
2691 EXPORT_SYMBOL_GPL(rtnl_delete_link);
2693 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
2694 struct netlink_ext_ack *extack)
2696 struct net *net = sock_net(skb->sk);
2697 struct net *tgt_net = net;
2698 struct net_device *dev = NULL;
2699 struct ifinfomsg *ifm;
2700 char ifname[IFNAMSIZ];
2701 struct nlattr *tb[IFLA_MAX+1];
2705 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
2709 err = rtnl_ensure_unique_netns(tb, extack, true);
2713 if (tb[IFLA_IFNAME])
2714 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2716 if (tb[IFLA_IF_NETNSID]) {
2717 netnsid = nla_get_s32(tb[IFLA_IF_NETNSID]);
2718 tgt_net = get_target_net(NETLINK_CB(skb).sk, netnsid);
2719 if (IS_ERR(tgt_net))
2720 return PTR_ERR(tgt_net);
2724 ifm = nlmsg_data(nlh);
2725 if (ifm->ifi_index > 0)
2726 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
2727 else if (tb[IFLA_IFNAME])
2728 dev = __dev_get_by_name(tgt_net, ifname);
2729 else if (tb[IFLA_GROUP])
2730 err = rtnl_group_dellink(tgt_net, nla_get_u32(tb[IFLA_GROUP]));
2735 if (tb[IFLA_IFNAME] || ifm->ifi_index > 0)
2741 err = rtnl_delete_link(dev);
2750 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2752 unsigned int old_flags;
2755 old_flags = dev->flags;
2756 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2757 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2762 if (dev->rtnl_link_state == RTNL_LINK_INITIALIZED) {
2763 __dev_notify_flags(dev, old_flags, 0U);
2765 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
2766 __dev_notify_flags(dev, old_flags, ~0U);
2770 EXPORT_SYMBOL(rtnl_configure_link);
2772 struct net_device *rtnl_create_link(struct net *net,
2773 const char *ifname, unsigned char name_assign_type,
2774 const struct rtnl_link_ops *ops, struct nlattr *tb[])
2776 struct net_device *dev;
2777 unsigned int num_tx_queues = 1;
2778 unsigned int num_rx_queues = 1;
2780 if (tb[IFLA_NUM_TX_QUEUES])
2781 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2782 else if (ops->get_num_tx_queues)
2783 num_tx_queues = ops->get_num_tx_queues();
2785 if (tb[IFLA_NUM_RX_QUEUES])
2786 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2787 else if (ops->get_num_rx_queues)
2788 num_rx_queues = ops->get_num_rx_queues();
2790 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
2791 ops->setup, num_tx_queues, num_rx_queues);
2793 return ERR_PTR(-ENOMEM);
2795 dev_net_set(dev, net);
2796 dev->rtnl_link_ops = ops;
2797 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
2800 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2801 if (tb[IFLA_ADDRESS]) {
2802 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2803 nla_len(tb[IFLA_ADDRESS]));
2804 dev->addr_assign_type = NET_ADDR_SET;
2806 if (tb[IFLA_BROADCAST])
2807 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2808 nla_len(tb[IFLA_BROADCAST]));
2809 if (tb[IFLA_TXQLEN])
2810 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2811 if (tb[IFLA_OPERSTATE])
2812 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2813 if (tb[IFLA_LINKMODE])
2814 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
2816 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2817 if (tb[IFLA_GSO_MAX_SIZE])
2818 netif_set_gso_max_size(dev, nla_get_u32(tb[IFLA_GSO_MAX_SIZE]));
2819 if (tb[IFLA_GSO_MAX_SEGS])
2820 dev->gso_max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
2824 EXPORT_SYMBOL(rtnl_create_link);
2826 static int rtnl_group_changelink(const struct sk_buff *skb,
2827 struct net *net, int group,
2828 struct ifinfomsg *ifm,
2829 struct netlink_ext_ack *extack,
2832 struct net_device *dev, *aux;
2835 for_each_netdev_safe(net, dev, aux) {
2836 if (dev->group == group) {
2837 err = do_setlink(skb, dev, ifm, extack, tb, NULL, 0);
2846 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2847 struct netlink_ext_ack *extack)
2849 struct net *net = sock_net(skb->sk);
2850 const struct rtnl_link_ops *ops;
2851 const struct rtnl_link_ops *m_ops = NULL;
2852 struct net_device *dev;
2853 struct net_device *master_dev = NULL;
2854 struct ifinfomsg *ifm;
2855 char kind[MODULE_NAME_LEN];
2856 char ifname[IFNAMSIZ];
2857 struct nlattr *tb[IFLA_MAX+1];
2858 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
2859 unsigned char name_assign_type = NET_NAME_USER;
2862 #ifdef CONFIG_MODULES
2865 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
2869 err = rtnl_ensure_unique_netns(tb, extack, false);
2873 if (tb[IFLA_IFNAME])
2874 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2878 ifm = nlmsg_data(nlh);
2879 if (ifm->ifi_index > 0)
2880 dev = __dev_get_by_index(net, ifm->ifi_index);
2883 dev = __dev_get_by_name(net, ifname);
2889 master_dev = netdev_master_upper_dev_get(dev);
2891 m_ops = master_dev->rtnl_link_ops;
2894 err = validate_linkmsg(dev, tb);
2898 if (tb[IFLA_LINKINFO]) {
2899 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2900 tb[IFLA_LINKINFO], ifla_info_policy,
2905 memset(linkinfo, 0, sizeof(linkinfo));
2907 if (linkinfo[IFLA_INFO_KIND]) {
2908 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2909 ops = rtnl_link_ops_get(kind);
2916 struct nlattr *attr[RTNL_MAX_TYPE + 1];
2917 struct nlattr *slave_attr[RTNL_SLAVE_MAX_TYPE + 1];
2918 struct nlattr **data = NULL;
2919 struct nlattr **slave_data = NULL;
2920 struct net *dest_net, *link_net = NULL;
2923 if (ops->maxtype > RTNL_MAX_TYPE)
2926 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2927 err = nla_parse_nested(attr, ops->maxtype,
2928 linkinfo[IFLA_INFO_DATA],
2934 if (ops->validate) {
2935 err = ops->validate(tb, data, extack);
2942 if (m_ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE)
2945 if (m_ops->slave_maxtype &&
2946 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2947 err = nla_parse_nested(slave_attr,
2948 m_ops->slave_maxtype,
2949 linkinfo[IFLA_INFO_SLAVE_DATA],
2950 m_ops->slave_policy,
2954 slave_data = slave_attr;
2961 if (nlh->nlmsg_flags & NLM_F_EXCL)
2963 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2966 if (linkinfo[IFLA_INFO_DATA]) {
2967 if (!ops || ops != dev->rtnl_link_ops ||
2971 err = ops->changelink(dev, tb, data, extack);
2974 status |= DO_SETLINK_NOTIFY;
2977 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2978 if (!m_ops || !m_ops->slave_changelink)
2981 err = m_ops->slave_changelink(master_dev, dev,
2986 status |= DO_SETLINK_NOTIFY;
2989 return do_setlink(skb, dev, ifm, extack, tb, ifname,
2993 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2994 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
2995 return rtnl_group_changelink(skb, net,
2996 nla_get_u32(tb[IFLA_GROUP]),
3001 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
3005 #ifdef CONFIG_MODULES
3008 request_module("rtnl-link-%s", kind);
3010 ops = rtnl_link_ops_get(kind);
3022 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
3023 name_assign_type = NET_NAME_ENUM;
3026 dest_net = rtnl_link_get_net_capable(skb, net, tb, CAP_NET_ADMIN);
3027 if (IS_ERR(dest_net))
3028 return PTR_ERR(dest_net);
3030 if (tb[IFLA_LINK_NETNSID]) {
3031 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
3033 link_net = get_net_ns_by_id(dest_net, id);
3039 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
3043 dev = rtnl_create_link(link_net ? : dest_net, ifname,
3044 name_assign_type, ops, tb);
3050 dev->ifindex = ifm->ifi_index;
3053 err = ops->newlink(link_net ? : net, dev, tb, data,
3055 /* Drivers should call free_netdev() in ->destructor
3056 * and unregister it on failure after registration
3057 * so that device could be finally freed in rtnl_unlock.
3060 /* If device is not registered at all, free it now */
3061 if (dev->reg_state == NETREG_UNINITIALIZED)
3066 err = register_netdevice(dev);
3072 err = rtnl_configure_link(dev, ifm);
3074 goto out_unregister;
3076 err = dev_change_net_namespace(dev, dest_net, ifname);
3078 goto out_unregister;
3080 if (tb[IFLA_MASTER]) {
3081 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]),
3084 goto out_unregister;
3093 LIST_HEAD(list_kill);
3095 ops->dellink(dev, &list_kill);
3096 unregister_netdevice_many(&list_kill);
3098 unregister_netdevice(dev);
3104 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3105 struct netlink_ext_ack *extack)
3107 struct net *net = sock_net(skb->sk);
3108 struct net *tgt_net = net;
3109 struct ifinfomsg *ifm;
3110 char ifname[IFNAMSIZ];
3111 struct nlattr *tb[IFLA_MAX+1];
3112 struct net_device *dev = NULL;
3113 struct sk_buff *nskb;
3116 u32 ext_filter_mask = 0;
3118 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
3122 err = rtnl_ensure_unique_netns(tb, extack, true);
3126 if (tb[IFLA_IF_NETNSID]) {
3127 netnsid = nla_get_s32(tb[IFLA_IF_NETNSID]);
3128 tgt_net = get_target_net(NETLINK_CB(skb).sk, netnsid);
3129 if (IS_ERR(tgt_net))
3130 return PTR_ERR(tgt_net);
3133 if (tb[IFLA_IFNAME])
3134 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3136 if (tb[IFLA_EXT_MASK])
3137 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3140 ifm = nlmsg_data(nlh);
3141 if (ifm->ifi_index > 0)
3142 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
3143 else if (tb[IFLA_IFNAME])
3144 dev = __dev_get_by_name(tgt_net, ifname);
3153 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
3157 err = rtnl_fill_ifinfo(nskb, dev, net,
3158 RTM_NEWLINK, NETLINK_CB(skb).portid,
3159 nlh->nlmsg_seq, 0, 0, ext_filter_mask,
3160 0, NULL, 0, netnsid);
3162 /* -EMSGSIZE implies BUG in if_nlmsg_size */
3163 WARN_ON(err == -EMSGSIZE);
3166 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
3174 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
3176 struct net *net = sock_net(skb->sk);
3177 struct net_device *dev;
3178 struct nlattr *tb[IFLA_MAX+1];
3179 u32 ext_filter_mask = 0;
3180 u16 min_ifinfo_dump_size = 0;
3183 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
3184 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
3185 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
3187 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
3188 if (tb[IFLA_EXT_MASK])
3189 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3192 if (!ext_filter_mask)
3193 return NLMSG_GOODSIZE;
3195 * traverse the list of net devices and compute the minimum
3196 * buffer size based upon the filter mask.
3199 for_each_netdev_rcu(net, dev) {
3200 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
3206 return nlmsg_total_size(min_ifinfo_dump_size);
3209 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
3212 int s_idx = cb->family;
3217 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
3218 struct rtnl_link **tab;
3219 int type = cb->nlh->nlmsg_type-RTM_BASE;
3220 struct rtnl_link *link;
3221 rtnl_dumpit_func dumpit;
3223 if (idx < s_idx || idx == PF_PACKET)
3226 if (type < 0 || type >= RTM_NR_MSGTYPES)
3229 tab = rcu_dereference_rtnl(rtnl_msg_handlers[idx]);
3237 dumpit = link->dumpit;
3242 memset(&cb->args[0], 0, sizeof(cb->args));
3246 if (dumpit(skb, cb))
3254 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
3255 unsigned int change,
3256 u32 event, gfp_t flags, int *new_nsid,
3259 struct net *net = dev_net(dev);
3260 struct sk_buff *skb;
3262 size_t if_info_size;
3264 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
3268 err = rtnl_fill_ifinfo(skb, dev, dev_net(dev),
3269 type, 0, 0, change, 0, 0, event,
3270 new_nsid, new_ifindex, -1);
3272 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
3273 WARN_ON(err == -EMSGSIZE);
3280 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
3284 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
3286 struct net *net = dev_net(dev);
3288 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
3291 static void rtmsg_ifinfo_event(int type, struct net_device *dev,
3292 unsigned int change, u32 event,
3293 gfp_t flags, int *new_nsid, int new_ifindex)
3295 struct sk_buff *skb;
3297 if (dev->reg_state != NETREG_REGISTERED)
3300 skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags, new_nsid,
3303 rtmsg_ifinfo_send(skb, dev, flags);
3306 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
3309 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
3313 void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change,
3314 gfp_t flags, int *new_nsid, int new_ifindex)
3316 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
3317 new_nsid, new_ifindex);
3320 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
3321 struct net_device *dev,
3322 u8 *addr, u16 vid, u32 pid, u32 seq,
3323 int type, unsigned int flags,
3324 int nlflags, u16 ndm_state)
3326 struct nlmsghdr *nlh;
3329 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
3333 ndm = nlmsg_data(nlh);
3334 ndm->ndm_family = AF_BRIDGE;
3337 ndm->ndm_flags = flags;
3339 ndm->ndm_ifindex = dev->ifindex;
3340 ndm->ndm_state = ndm_state;
3342 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
3343 goto nla_put_failure;
3345 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
3346 goto nla_put_failure;
3348 nlmsg_end(skb, nlh);
3352 nlmsg_cancel(skb, nlh);
3356 static inline size_t rtnl_fdb_nlmsg_size(void)
3358 return NLMSG_ALIGN(sizeof(struct ndmsg)) +
3359 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */
3360 nla_total_size(sizeof(u16)) + /* NDA_VLAN */
3364 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
3367 struct net *net = dev_net(dev);
3368 struct sk_buff *skb;
3371 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
3375 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
3376 0, 0, type, NTF_SELF, 0, ndm_state);
3382 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
3385 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
3389 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
3391 int ndo_dflt_fdb_add(struct ndmsg *ndm,
3392 struct nlattr *tb[],
3393 struct net_device *dev,
3394 const unsigned char *addr, u16 vid,
3399 /* If aging addresses are supported device will need to
3400 * implement its own handler for this.
3402 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
3403 pr_info("%s: FDB only supports static addresses\n", dev->name);
3408 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
3412 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3413 err = dev_uc_add_excl(dev, addr);
3414 else if (is_multicast_ether_addr(addr))
3415 err = dev_mc_add_excl(dev, addr);
3417 /* Only return duplicate errors if NLM_F_EXCL is set */
3418 if (err == -EEXIST && !(flags & NLM_F_EXCL))
3423 EXPORT_SYMBOL(ndo_dflt_fdb_add);
3425 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid,
3426 struct netlink_ext_ack *extack)
3431 if (nla_len(vlan_attr) != sizeof(u16)) {
3432 NL_SET_ERR_MSG(extack, "invalid vlan attribute size");
3436 vid = nla_get_u16(vlan_attr);
3438 if (!vid || vid >= VLAN_VID_MASK) {
3439 NL_SET_ERR_MSG(extack, "invalid vlan id");
3447 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
3448 struct netlink_ext_ack *extack)
3450 struct net *net = sock_net(skb->sk);
3452 struct nlattr *tb[NDA_MAX+1];
3453 struct net_device *dev;
3458 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
3462 ndm = nlmsg_data(nlh);
3463 if (ndm->ndm_ifindex == 0) {
3464 NL_SET_ERR_MSG(extack, "invalid ifindex");
3468 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3470 NL_SET_ERR_MSG(extack, "unknown ifindex");
3474 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3475 NL_SET_ERR_MSG(extack, "invalid address");
3479 addr = nla_data(tb[NDA_LLADDR]);
3481 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
3487 /* Support fdb on master device the net/bridge default case */
3488 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3489 (dev->priv_flags & IFF_BRIDGE_PORT)) {
3490 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3491 const struct net_device_ops *ops = br_dev->netdev_ops;
3493 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
3498 ndm->ndm_flags &= ~NTF_MASTER;
3501 /* Embedded bridge, macvlan, and any other device support */
3502 if ((ndm->ndm_flags & NTF_SELF)) {
3503 if (dev->netdev_ops->ndo_fdb_add)
3504 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
3508 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
3512 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
3514 ndm->ndm_flags &= ~NTF_SELF;
3522 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
3524 int ndo_dflt_fdb_del(struct ndmsg *ndm,
3525 struct nlattr *tb[],
3526 struct net_device *dev,
3527 const unsigned char *addr, u16 vid)
3531 /* If aging addresses are supported device will need to
3532 * implement its own handler for this.
3534 if (!(ndm->ndm_state & NUD_PERMANENT)) {
3535 pr_info("%s: FDB only supports static addresses\n", dev->name);
3539 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3540 err = dev_uc_del(dev, addr);
3541 else if (is_multicast_ether_addr(addr))
3542 err = dev_mc_del(dev, addr);
3546 EXPORT_SYMBOL(ndo_dflt_fdb_del);
3548 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
3549 struct netlink_ext_ack *extack)
3551 struct net *net = sock_net(skb->sk);
3553 struct nlattr *tb[NDA_MAX+1];
3554 struct net_device *dev;
3559 if (!netlink_capable(skb, CAP_NET_ADMIN))
3562 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
3566 ndm = nlmsg_data(nlh);
3567 if (ndm->ndm_ifindex == 0) {
3568 NL_SET_ERR_MSG(extack, "invalid ifindex");
3572 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3574 NL_SET_ERR_MSG(extack, "unknown ifindex");
3578 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3579 NL_SET_ERR_MSG(extack, "invalid address");
3583 addr = nla_data(tb[NDA_LLADDR]);
3585 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
3591 /* Support fdb on master device the net/bridge default case */
3592 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3593 (dev->priv_flags & IFF_BRIDGE_PORT)) {
3594 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3595 const struct net_device_ops *ops = br_dev->netdev_ops;
3597 if (ops->ndo_fdb_del)
3598 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
3603 ndm->ndm_flags &= ~NTF_MASTER;
3606 /* Embedded bridge, macvlan, and any other device support */
3607 if (ndm->ndm_flags & NTF_SELF) {
3608 if (dev->netdev_ops->ndo_fdb_del)
3609 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
3612 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
3615 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
3617 ndm->ndm_flags &= ~NTF_SELF;
3624 static int nlmsg_populate_fdb(struct sk_buff *skb,
3625 struct netlink_callback *cb,
3626 struct net_device *dev,
3628 struct netdev_hw_addr_list *list)
3630 struct netdev_hw_addr *ha;
3634 portid = NETLINK_CB(cb->skb).portid;
3635 seq = cb->nlh->nlmsg_seq;
3637 list_for_each_entry(ha, &list->list, list) {
3638 if (*idx < cb->args[2])
3641 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
3643 RTM_NEWNEIGH, NTF_SELF,
3644 NLM_F_MULTI, NUD_PERMANENT);
3654 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
3655 * @nlh: netlink message header
3658 * Default netdevice operation to dump the existing unicast address list.
3659 * Returns number of addresses from list put in skb.
3661 int ndo_dflt_fdb_dump(struct sk_buff *skb,
3662 struct netlink_callback *cb,
3663 struct net_device *dev,
3664 struct net_device *filter_dev,
3669 netif_addr_lock_bh(dev);
3670 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
3673 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
3675 netif_addr_unlock_bh(dev);
3678 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3680 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3682 struct net_device *dev;
3683 struct nlattr *tb[IFLA_MAX+1];
3684 struct net_device *br_dev = NULL;
3685 const struct net_device_ops *ops = NULL;
3686 const struct net_device_ops *cops = NULL;
3687 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3688 struct net *net = sock_net(skb->sk);
3689 struct hlist_head *head;
3697 err = nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb,
3698 IFLA_MAX, ifla_policy, NULL);
3701 } else if (err == 0) {
3702 if (tb[IFLA_MASTER])
3703 br_idx = nla_get_u32(tb[IFLA_MASTER]);
3706 brport_idx = ifm->ifi_index;
3709 br_dev = __dev_get_by_index(net, br_idx);
3713 ops = br_dev->netdev_ops;
3717 s_idx = cb->args[1];
3719 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3721 head = &net->dev_index_head[h];
3722 hlist_for_each_entry(dev, head, index_hlist) {
3724 if (brport_idx && (dev->ifindex != brport_idx))
3727 if (!br_idx) { /* user did not specify a specific bridge */
3728 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3729 br_dev = netdev_master_upper_dev_get(dev);
3730 cops = br_dev->netdev_ops;
3733 if (dev != br_dev &&
3734 !(dev->priv_flags & IFF_BRIDGE_PORT))
3737 if (br_dev != netdev_master_upper_dev_get(dev) &&
3738 !(dev->priv_flags & IFF_EBRIDGE))
3746 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3747 if (cops && cops->ndo_fdb_dump) {
3748 err = cops->ndo_fdb_dump(skb, cb,
3751 if (err == -EMSGSIZE)
3756 if (dev->netdev_ops->ndo_fdb_dump)
3757 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
3761 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
3763 if (err == -EMSGSIZE)
3768 /* reset fdb offset to 0 for rest of the interfaces */
3784 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3785 unsigned int attrnum, unsigned int flag)
3788 return nla_put_u8(skb, attrnum, !!(flags & flag));
3792 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
3793 struct net_device *dev, u16 mode,
3794 u32 flags, u32 mask, int nlflags,
3796 int (*vlan_fill)(struct sk_buff *skb,
3797 struct net_device *dev,
3800 struct nlmsghdr *nlh;
3801 struct ifinfomsg *ifm;
3802 struct nlattr *br_afspec;
3803 struct nlattr *protinfo;
3804 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
3805 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3808 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
3812 ifm = nlmsg_data(nlh);
3813 ifm->ifi_family = AF_BRIDGE;
3815 ifm->ifi_type = dev->type;
3816 ifm->ifi_index = dev->ifindex;
3817 ifm->ifi_flags = dev_get_flags(dev);
3818 ifm->ifi_change = 0;
3821 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3822 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3823 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
3825 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
3827 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
3828 (dev->ifindex != dev_get_iflink(dev) &&
3829 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
3830 goto nla_put_failure;
3832 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3834 goto nla_put_failure;
3836 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
3837 nla_nest_cancel(skb, br_afspec);
3838 goto nla_put_failure;
3841 if (mode != BRIDGE_MODE_UNDEF) {
3842 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3843 nla_nest_cancel(skb, br_afspec);
3844 goto nla_put_failure;
3848 err = vlan_fill(skb, dev, filter_mask);
3850 nla_nest_cancel(skb, br_afspec);
3851 goto nla_put_failure;
3854 nla_nest_end(skb, br_afspec);
3856 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3858 goto nla_put_failure;
3860 if (brport_nla_put_flag(skb, flags, mask,
3861 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3862 brport_nla_put_flag(skb, flags, mask,
3863 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3864 brport_nla_put_flag(skb, flags, mask,
3865 IFLA_BRPORT_FAST_LEAVE,
3866 BR_MULTICAST_FAST_LEAVE) ||
3867 brport_nla_put_flag(skb, flags, mask,
3868 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3869 brport_nla_put_flag(skb, flags, mask,
3870 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3871 brport_nla_put_flag(skb, flags, mask,
3872 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3873 brport_nla_put_flag(skb, flags, mask,
3874 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3875 brport_nla_put_flag(skb, flags, mask,
3876 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3877 nla_nest_cancel(skb, protinfo);
3878 goto nla_put_failure;
3881 nla_nest_end(skb, protinfo);
3883 nlmsg_end(skb, nlh);
3886 nlmsg_cancel(skb, nlh);
3887 return err ? err : -EMSGSIZE;
3889 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
3891 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3893 struct net *net = sock_net(skb->sk);
3894 struct net_device *dev;
3896 u32 portid = NETLINK_CB(cb->skb).portid;
3897 u32 seq = cb->nlh->nlmsg_seq;
3898 u32 filter_mask = 0;
3901 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3902 struct nlattr *extfilt;
3904 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3907 if (nla_len(extfilt) < sizeof(filter_mask))
3910 filter_mask = nla_get_u32(extfilt);
3915 for_each_netdev_rcu(net, dev) {
3916 const struct net_device_ops *ops = dev->netdev_ops;
3917 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3919 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
3920 if (idx >= cb->args[0]) {
3921 err = br_dev->netdev_ops->ndo_bridge_getlink(
3922 skb, portid, seq, dev,
3923 filter_mask, NLM_F_MULTI);
3924 if (err < 0 && err != -EOPNOTSUPP) {
3925 if (likely(skb->len))
3934 if (ops->ndo_bridge_getlink) {
3935 if (idx >= cb->args[0]) {
3936 err = ops->ndo_bridge_getlink(skb, portid,
3940 if (err < 0 && err != -EOPNOTSUPP) {
3941 if (likely(skb->len))
3958 static inline size_t bridge_nlmsg_size(void)
3960 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3961 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3962 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3963 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3964 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3965 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3966 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3967 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3968 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3969 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3970 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3973 static int rtnl_bridge_notify(struct net_device *dev)
3975 struct net *net = dev_net(dev);
3976 struct sk_buff *skb;
3977 int err = -EOPNOTSUPP;
3979 if (!dev->netdev_ops->ndo_bridge_getlink)
3982 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3988 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
3995 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3998 WARN_ON(err == -EMSGSIZE);
4001 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
4005 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
4006 struct netlink_ext_ack *extack)
4008 struct net *net = sock_net(skb->sk);
4009 struct ifinfomsg *ifm;
4010 struct net_device *dev;
4011 struct nlattr *br_spec, *attr = NULL;
4012 int rem, err = -EOPNOTSUPP;
4014 bool have_flags = false;
4016 if (nlmsg_len(nlh) < sizeof(*ifm))
4019 ifm = nlmsg_data(nlh);
4020 if (ifm->ifi_family != AF_BRIDGE)
4021 return -EPFNOSUPPORT;
4023 dev = __dev_get_by_index(net, ifm->ifi_index);
4025 NL_SET_ERR_MSG(extack, "unknown ifindex");
4029 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
4031 nla_for_each_nested(attr, br_spec, rem) {
4032 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
4033 if (nla_len(attr) < sizeof(flags))
4037 flags = nla_get_u16(attr);
4043 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
4044 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4046 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
4051 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
4055 flags &= ~BRIDGE_FLAGS_MASTER;
4058 if ((flags & BRIDGE_FLAGS_SELF)) {
4059 if (!dev->netdev_ops->ndo_bridge_setlink)
4062 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
4065 flags &= ~BRIDGE_FLAGS_SELF;
4067 /* Generate event to notify upper layer of bridge
4070 err = rtnl_bridge_notify(dev);
4075 memcpy(nla_data(attr), &flags, sizeof(flags));
4080 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
4081 struct netlink_ext_ack *extack)
4083 struct net *net = sock_net(skb->sk);
4084 struct ifinfomsg *ifm;
4085 struct net_device *dev;
4086 struct nlattr *br_spec, *attr = NULL;
4087 int rem, err = -EOPNOTSUPP;
4089 bool have_flags = false;
4091 if (nlmsg_len(nlh) < sizeof(*ifm))
4094 ifm = nlmsg_data(nlh);
4095 if (ifm->ifi_family != AF_BRIDGE)
4096 return -EPFNOSUPPORT;
4098 dev = __dev_get_by_index(net, ifm->ifi_index);
4100 NL_SET_ERR_MSG(extack, "unknown ifindex");
4104 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
4106 nla_for_each_nested(attr, br_spec, rem) {
4107 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
4108 if (nla_len(attr) < sizeof(flags))
4112 flags = nla_get_u16(attr);
4118 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
4119 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4121 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
4126 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
4130 flags &= ~BRIDGE_FLAGS_MASTER;
4133 if ((flags & BRIDGE_FLAGS_SELF)) {
4134 if (!dev->netdev_ops->ndo_bridge_dellink)
4137 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
4141 flags &= ~BRIDGE_FLAGS_SELF;
4143 /* Generate event to notify upper layer of bridge
4146 err = rtnl_bridge_notify(dev);
4151 memcpy(nla_data(attr), &flags, sizeof(flags));
4156 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
4158 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
4159 (!idxattr || idxattr == attrid);
4162 #define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1)
4163 static int rtnl_get_offload_stats_attr_size(int attr_id)
4166 case IFLA_OFFLOAD_XSTATS_CPU_HIT:
4167 return sizeof(struct rtnl_link_stats64);
4173 static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev,
4176 struct nlattr *attr = NULL;
4181 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
4182 dev->netdev_ops->ndo_get_offload_stats))
4185 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
4186 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
4187 if (attr_id < *prividx)
4190 size = rtnl_get_offload_stats_attr_size(attr_id);
4194 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
4197 attr = nla_reserve_64bit(skb, attr_id, size,
4198 IFLA_OFFLOAD_XSTATS_UNSPEC);
4200 goto nla_put_failure;
4202 attr_data = nla_data(attr);
4203 memset(attr_data, 0, size);
4204 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev,
4207 goto get_offload_stats_failure;
4218 get_offload_stats_failure:
4223 static int rtnl_get_offload_stats_size(const struct net_device *dev)
4229 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
4230 dev->netdev_ops->ndo_get_offload_stats))
4233 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
4234 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
4235 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
4237 size = rtnl_get_offload_stats_attr_size(attr_id);
4238 nla_size += nla_total_size_64bit(size);
4242 nla_size += nla_total_size(0);
4247 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
4248 int type, u32 pid, u32 seq, u32 change,
4249 unsigned int flags, unsigned int filter_mask,
4250 int *idxattr, int *prividx)
4252 struct if_stats_msg *ifsm;
4253 struct nlmsghdr *nlh;
4254 struct nlattr *attr;
4255 int s_prividx = *prividx;
4260 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
4264 ifsm = nlmsg_data(nlh);
4265 ifsm->family = PF_UNSPEC;
4268 ifsm->ifindex = dev->ifindex;
4269 ifsm->filter_mask = filter_mask;
4271 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
4272 struct rtnl_link_stats64 *sp;
4274 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
4275 sizeof(struct rtnl_link_stats64),
4278 goto nla_put_failure;
4280 sp = nla_data(attr);
4281 dev_get_stats(dev, sp);
4284 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
4285 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
4287 if (ops && ops->fill_linkxstats) {
4288 *idxattr = IFLA_STATS_LINK_XSTATS;
4289 attr = nla_nest_start(skb,
4290 IFLA_STATS_LINK_XSTATS);
4292 goto nla_put_failure;
4294 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
4295 nla_nest_end(skb, attr);
4297 goto nla_put_failure;
4302 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
4304 const struct rtnl_link_ops *ops = NULL;
4305 const struct net_device *master;
4307 master = netdev_master_upper_dev_get(dev);
4309 ops = master->rtnl_link_ops;
4310 if (ops && ops->fill_linkxstats) {
4311 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
4312 attr = nla_nest_start(skb,
4313 IFLA_STATS_LINK_XSTATS_SLAVE);
4315 goto nla_put_failure;
4317 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
4318 nla_nest_end(skb, attr);
4320 goto nla_put_failure;
4325 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
4327 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
4328 attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS);
4330 goto nla_put_failure;
4332 err = rtnl_get_offload_stats(skb, dev, prividx);
4333 if (err == -ENODATA)
4334 nla_nest_cancel(skb, attr);
4336 nla_nest_end(skb, attr);
4338 if (err && err != -ENODATA)
4339 goto nla_put_failure;
4343 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
4344 struct rtnl_af_ops *af_ops;
4346 *idxattr = IFLA_STATS_AF_SPEC;
4347 attr = nla_nest_start(skb, IFLA_STATS_AF_SPEC);
4349 goto nla_put_failure;
4352 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
4353 if (af_ops->fill_stats_af) {
4357 af = nla_nest_start(skb, af_ops->family);
4360 goto nla_put_failure;
4362 err = af_ops->fill_stats_af(skb, dev);
4364 if (err == -ENODATA) {
4365 nla_nest_cancel(skb, af);
4366 } else if (err < 0) {
4368 goto nla_put_failure;
4371 nla_nest_end(skb, af);
4376 nla_nest_end(skb, attr);
4381 nlmsg_end(skb, nlh);
4386 /* not a multi message or no progress mean a real error */
4387 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
4388 nlmsg_cancel(skb, nlh);
4390 nlmsg_end(skb, nlh);
4395 static size_t if_nlmsg_stats_size(const struct net_device *dev,
4400 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
4401 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
4403 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
4404 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
4405 int attr = IFLA_STATS_LINK_XSTATS;
4407 if (ops && ops->get_linkxstats_size) {
4408 size += nla_total_size(ops->get_linkxstats_size(dev,
4410 /* for IFLA_STATS_LINK_XSTATS */
4411 size += nla_total_size(0);
4415 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
4416 struct net_device *_dev = (struct net_device *)dev;
4417 const struct rtnl_link_ops *ops = NULL;
4418 const struct net_device *master;
4420 /* netdev_master_upper_dev_get can't take const */
4421 master = netdev_master_upper_dev_get(_dev);
4423 ops = master->rtnl_link_ops;
4424 if (ops && ops->get_linkxstats_size) {
4425 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
4427 size += nla_total_size(ops->get_linkxstats_size(dev,
4429 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
4430 size += nla_total_size(0);
4434 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
4435 size += rtnl_get_offload_stats_size(dev);
4437 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
4438 struct rtnl_af_ops *af_ops;
4440 /* for IFLA_STATS_AF_SPEC */
4441 size += nla_total_size(0);
4444 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
4445 if (af_ops->get_stats_af_size) {
4446 size += nla_total_size(
4447 af_ops->get_stats_af_size(dev));
4450 size += nla_total_size(0);
4459 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
4460 struct netlink_ext_ack *extack)
4462 struct net *net = sock_net(skb->sk);
4463 struct net_device *dev = NULL;
4464 int idxattr = 0, prividx = 0;
4465 struct if_stats_msg *ifsm;
4466 struct sk_buff *nskb;
4470 if (nlmsg_len(nlh) < sizeof(*ifsm))
4473 ifsm = nlmsg_data(nlh);
4474 if (ifsm->ifindex > 0)
4475 dev = __dev_get_by_index(net, ifsm->ifindex);
4482 filter_mask = ifsm->filter_mask;
4486 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
4490 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
4491 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
4492 0, filter_mask, &idxattr, &prividx);
4494 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
4495 WARN_ON(err == -EMSGSIZE);
4498 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
4504 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
4506 int h, s_h, err, s_idx, s_idxattr, s_prividx;
4507 struct net *net = sock_net(skb->sk);
4508 unsigned int flags = NLM_F_MULTI;
4509 struct if_stats_msg *ifsm;
4510 struct hlist_head *head;
4511 struct net_device *dev;
4512 u32 filter_mask = 0;
4516 s_idx = cb->args[1];
4517 s_idxattr = cb->args[2];
4518 s_prividx = cb->args[3];
4520 cb->seq = net->dev_base_seq;
4522 if (nlmsg_len(cb->nlh) < sizeof(*ifsm))
4525 ifsm = nlmsg_data(cb->nlh);
4526 filter_mask = ifsm->filter_mask;
4530 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4532 head = &net->dev_index_head[h];
4533 hlist_for_each_entry(dev, head, index_hlist) {
4536 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
4537 NETLINK_CB(cb->skb).portid,
4538 cb->nlh->nlmsg_seq, 0,
4540 &s_idxattr, &s_prividx);
4541 /* If we ran out of room on the first message,
4544 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
4550 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
4556 cb->args[3] = s_prividx;
4557 cb->args[2] = s_idxattr;
4564 /* Process one rtnetlink message. */
4566 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
4567 struct netlink_ext_ack *extack)
4569 struct net *net = sock_net(skb->sk);
4570 struct rtnl_link *link;
4571 struct module *owner;
4572 int err = -EOPNOTSUPP;
4573 rtnl_doit_func doit;
4579 type = nlh->nlmsg_type;
4585 /* All the messages must have at least 1 byte length */
4586 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
4589 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
4592 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
4596 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
4598 rtnl_dumpit_func dumpit;
4599 u16 min_dump_alloc = 0;
4601 link = rtnl_get_link(family, type);
4602 if (!link || !link->dumpit) {
4604 link = rtnl_get_link(family, type);
4605 if (!link || !link->dumpit)
4608 owner = link->owner;
4609 dumpit = link->dumpit;
4611 if (type == RTM_GETLINK - RTM_BASE)
4612 min_dump_alloc = rtnl_calcit(skb, nlh);
4615 /* need to do this before rcu_read_unlock() */
4616 if (!try_module_get(owner))
4617 err = -EPROTONOSUPPORT;
4623 struct netlink_dump_control c = {
4625 .min_dump_alloc = min_dump_alloc,
4628 err = netlink_dump_start(rtnl, skb, nlh, &c);
4629 /* netlink_dump_start() will keep a reference on
4630 * module if dump is still in progress.
4637 link = rtnl_get_link(family, type);
4638 if (!link || !link->doit) {
4640 link = rtnl_get_link(PF_UNSPEC, type);
4641 if (!link || !link->doit)
4645 owner = link->owner;
4646 if (!try_module_get(owner)) {
4647 err = -EPROTONOSUPPORT;
4651 flags = link->flags;
4652 if (flags & RTNL_FLAG_DOIT_UNLOCKED) {
4656 err = doit(skb, nlh, extack);
4663 link = rtnl_get_link(family, type);
4664 if (link && link->doit)
4665 err = link->doit(skb, nlh, extack);
4681 static void rtnetlink_rcv(struct sk_buff *skb)
4683 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
4686 static int rtnetlink_bind(struct net *net, int group)
4689 case RTNLGRP_IPV4_MROUTE_R:
4690 case RTNLGRP_IPV6_MROUTE_R:
4691 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
4698 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
4700 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
4704 case NETDEV_CHANGEMTU:
4705 case NETDEV_CHANGEADDR:
4706 case NETDEV_CHANGENAME:
4707 case NETDEV_FEAT_CHANGE:
4708 case NETDEV_BONDING_FAILOVER:
4709 case NETDEV_POST_TYPE_CHANGE:
4710 case NETDEV_NOTIFY_PEERS:
4711 case NETDEV_CHANGEUPPER:
4712 case NETDEV_RESEND_IGMP:
4713 case NETDEV_CHANGEINFODATA:
4714 case NETDEV_CHANGELOWERSTATE:
4715 case NETDEV_CHANGE_TX_QUEUE_LEN:
4716 rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event),
4717 GFP_KERNEL, NULL, 0);
4725 static struct notifier_block rtnetlink_dev_notifier = {
4726 .notifier_call = rtnetlink_event,
4730 static int __net_init rtnetlink_net_init(struct net *net)
4733 struct netlink_kernel_cfg cfg = {
4734 .groups = RTNLGRP_MAX,
4735 .input = rtnetlink_rcv,
4736 .cb_mutex = &rtnl_mutex,
4737 .flags = NL_CFG_F_NONROOT_RECV,
4738 .bind = rtnetlink_bind,
4741 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
4748 static void __net_exit rtnetlink_net_exit(struct net *net)
4750 netlink_kernel_release(net->rtnl);
4754 static struct pernet_operations rtnetlink_net_ops = {
4755 .init = rtnetlink_net_init,
4756 .exit = rtnetlink_net_exit,
4759 void __init rtnetlink_init(void)
4761 if (register_pernet_subsys(&rtnetlink_net_ops))
4762 panic("rtnetlink_init: cannot initialize rtnetlink\n");
4764 register_netdevice_notifier(&rtnetlink_dev_notifier);
4766 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
4767 rtnl_dump_ifinfo, 0);
4768 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, 0);
4769 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, 0);
4770 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, 0);
4772 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, 0);
4773 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, 0);
4774 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, 0);
4776 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0);
4777 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, 0);
4778 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, 0);
4780 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, 0);
4781 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, 0);
4782 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, 0);
4784 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,