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>
50 #include <net/protocol.h>
52 #include <net/route.h>
56 #include <net/pkt_sched.h>
57 #include <net/fib_rules.h>
58 #include <net/rtnetlink.h>
59 #include <net/net_namespace.h>
61 #define RTNL_MAX_TYPE 50
62 #define RTNL_SLAVE_MAX_TYPE 36
66 rtnl_dumpit_func dumpit;
72 static DEFINE_MUTEX(rtnl_mutex);
76 mutex_lock(&rtnl_mutex);
78 EXPORT_SYMBOL(rtnl_lock);
80 int rtnl_lock_killable(void)
82 return mutex_lock_killable(&rtnl_mutex);
84 EXPORT_SYMBOL(rtnl_lock_killable);
86 static struct sk_buff *defer_kfree_skb_list;
87 void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
90 tail->next = defer_kfree_skb_list;
91 defer_kfree_skb_list = head;
94 EXPORT_SYMBOL(rtnl_kfree_skbs);
96 void __rtnl_unlock(void)
98 struct sk_buff *head = defer_kfree_skb_list;
100 defer_kfree_skb_list = NULL;
102 mutex_unlock(&rtnl_mutex);
105 struct sk_buff *next = head->next;
113 void rtnl_unlock(void)
115 /* This fellow will unlock it for us. */
118 EXPORT_SYMBOL(rtnl_unlock);
120 int rtnl_trylock(void)
122 return mutex_trylock(&rtnl_mutex);
124 EXPORT_SYMBOL(rtnl_trylock);
126 int rtnl_is_locked(void)
128 return mutex_is_locked(&rtnl_mutex);
130 EXPORT_SYMBOL(rtnl_is_locked);
132 bool refcount_dec_and_rtnl_lock(refcount_t *r)
134 return refcount_dec_and_mutex_lock(r, &rtnl_mutex);
136 EXPORT_SYMBOL(refcount_dec_and_rtnl_lock);
138 #ifdef CONFIG_PROVE_LOCKING
139 bool lockdep_rtnl_is_held(void)
141 return lockdep_is_held(&rtnl_mutex);
143 EXPORT_SYMBOL(lockdep_rtnl_is_held);
144 #endif /* #ifdef CONFIG_PROVE_LOCKING */
146 static struct rtnl_link *__rcu *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
148 static inline int rtm_msgindex(int msgtype)
150 int msgindex = msgtype - RTM_BASE;
153 * msgindex < 0 implies someone tried to register a netlink
154 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
155 * the message type has not been added to linux/rtnetlink.h
157 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
162 static struct rtnl_link *rtnl_get_link(int protocol, int msgtype)
164 struct rtnl_link **tab;
166 if (protocol >= ARRAY_SIZE(rtnl_msg_handlers))
167 protocol = PF_UNSPEC;
169 tab = rcu_dereference_rtnl(rtnl_msg_handlers[protocol]);
171 tab = rcu_dereference_rtnl(rtnl_msg_handlers[PF_UNSPEC]);
176 static int rtnl_register_internal(struct module *owner,
177 int protocol, int msgtype,
178 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
181 struct rtnl_link *link, *old;
182 struct rtnl_link __rcu **tab;
186 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
187 msgindex = rtm_msgindex(msgtype);
190 tab = rtnl_msg_handlers[protocol];
192 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(void *), GFP_KERNEL);
196 /* ensures we see the 0 stores */
197 rcu_assign_pointer(rtnl_msg_handlers[protocol], tab);
200 old = rtnl_dereference(tab[msgindex]);
202 link = kmemdup(old, sizeof(*old), GFP_KERNEL);
206 link = kzalloc(sizeof(*link), GFP_KERNEL);
211 WARN_ON(link->owner && link->owner != owner);
214 WARN_ON(doit && link->doit && link->doit != doit);
217 WARN_ON(dumpit && link->dumpit && link->dumpit != dumpit);
219 link->dumpit = dumpit;
221 link->flags |= flags;
223 /* publish protocol:msgtype */
224 rcu_assign_pointer(tab[msgindex], link);
234 * rtnl_register_module - Register a rtnetlink message type
236 * @owner: module registering the hook (THIS_MODULE)
237 * @protocol: Protocol family or PF_UNSPEC
238 * @msgtype: rtnetlink message type
239 * @doit: Function pointer called for each request message
240 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
241 * @flags: rtnl_link_flags to modifiy behaviour of doit/dumpit functions
243 * Like rtnl_register, but for use by removable modules.
245 int rtnl_register_module(struct module *owner,
246 int protocol, int msgtype,
247 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
250 return rtnl_register_internal(owner, protocol, msgtype,
251 doit, dumpit, flags);
253 EXPORT_SYMBOL_GPL(rtnl_register_module);
256 * rtnl_register - Register a rtnetlink message type
257 * @protocol: Protocol family or PF_UNSPEC
258 * @msgtype: rtnetlink message type
259 * @doit: Function pointer called for each request message
260 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
261 * @flags: rtnl_link_flags to modifiy behaviour of doit/dumpit functions
263 * Registers the specified function pointers (at least one of them has
264 * to be non-NULL) to be called whenever a request message for the
265 * specified protocol family and message type is received.
267 * The special protocol family PF_UNSPEC may be used to define fallback
268 * function pointers for the case when no entry for the specific protocol
271 void rtnl_register(int protocol, int msgtype,
272 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
277 err = rtnl_register_internal(NULL, protocol, msgtype, doit, dumpit,
280 pr_err("Unable to register rtnetlink message handler, "
281 "protocol = %d, message type = %d\n", protocol, msgtype);
285 * rtnl_unregister - Unregister a rtnetlink message type
286 * @protocol: Protocol family or PF_UNSPEC
287 * @msgtype: rtnetlink message type
289 * Returns 0 on success or a negative error code.
291 int rtnl_unregister(int protocol, int msgtype)
293 struct rtnl_link **tab, *link;
296 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
297 msgindex = rtm_msgindex(msgtype);
300 tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
306 link = tab[msgindex];
307 rcu_assign_pointer(tab[msgindex], NULL);
310 kfree_rcu(link, rcu);
314 EXPORT_SYMBOL_GPL(rtnl_unregister);
317 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
318 * @protocol : Protocol family or PF_UNSPEC
320 * Identical to calling rtnl_unregster() for all registered message types
321 * of a certain protocol family.
323 void rtnl_unregister_all(int protocol)
325 struct rtnl_link **tab, *link;
328 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
331 tab = rtnl_msg_handlers[protocol];
336 RCU_INIT_POINTER(rtnl_msg_handlers[protocol], NULL);
337 for (msgindex = 0; msgindex < RTM_NR_MSGTYPES; msgindex++) {
338 link = tab[msgindex];
342 rcu_assign_pointer(tab[msgindex], NULL);
343 kfree_rcu(link, rcu);
351 EXPORT_SYMBOL_GPL(rtnl_unregister_all);
353 static LIST_HEAD(link_ops);
355 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
357 const struct rtnl_link_ops *ops;
359 list_for_each_entry(ops, &link_ops, list) {
360 if (!strcmp(ops->kind, kind))
367 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
368 * @ops: struct rtnl_link_ops * to register
370 * The caller must hold the rtnl_mutex. This function should be used
371 * by drivers that create devices during module initialization. It
372 * must be called before registering the devices.
374 * Returns 0 on success or a negative error code.
376 int __rtnl_link_register(struct rtnl_link_ops *ops)
378 if (rtnl_link_ops_get(ops->kind))
381 /* The check for setup is here because if ops
382 * does not have that filled up, it is not possible
383 * to use the ops for creating device. So do not
384 * fill up dellink as well. That disables rtnl_dellink.
386 if (ops->setup && !ops->dellink)
387 ops->dellink = unregister_netdevice_queue;
389 list_add_tail(&ops->list, &link_ops);
392 EXPORT_SYMBOL_GPL(__rtnl_link_register);
395 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
396 * @ops: struct rtnl_link_ops * to register
398 * Returns 0 on success or a negative error code.
400 int rtnl_link_register(struct rtnl_link_ops *ops)
404 /* Sanity-check max sizes to avoid stack buffer overflow. */
405 if (WARN_ON(ops->maxtype > RTNL_MAX_TYPE ||
406 ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE))
410 err = __rtnl_link_register(ops);
414 EXPORT_SYMBOL_GPL(rtnl_link_register);
416 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
418 struct net_device *dev;
419 LIST_HEAD(list_kill);
421 for_each_netdev(net, dev) {
422 if (dev->rtnl_link_ops == ops)
423 ops->dellink(dev, &list_kill);
425 unregister_netdevice_many(&list_kill);
429 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
430 * @ops: struct rtnl_link_ops * to unregister
432 * The caller must hold the rtnl_mutex and guarantee net_namespace_list
433 * integrity (hold pernet_ops_rwsem for writing to close the race
434 * with setup_net() and cleanup_net()).
436 void __rtnl_link_unregister(struct rtnl_link_ops *ops)
441 __rtnl_kill_links(net, ops);
443 list_del(&ops->list);
445 EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
447 /* Return with the rtnl_lock held when there are no network
448 * devices unregistering in any network namespace.
450 static void rtnl_lock_unregistering_all(void)
454 DEFINE_WAIT_FUNC(wait, woken_wake_function);
456 add_wait_queue(&netdev_unregistering_wq, &wait);
458 unregistering = false;
460 /* We held write locked pernet_ops_rwsem, and parallel
461 * setup_net() and cleanup_net() are not possible.
464 if (net->dev_unreg_count > 0) {
465 unregistering = true;
473 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
475 remove_wait_queue(&netdev_unregistering_wq, &wait);
479 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
480 * @ops: struct rtnl_link_ops * to unregister
482 void rtnl_link_unregister(struct rtnl_link_ops *ops)
484 /* Close the race with setup_net() and cleanup_net() */
485 down_write(&pernet_ops_rwsem);
486 rtnl_lock_unregistering_all();
487 __rtnl_link_unregister(ops);
489 up_write(&pernet_ops_rwsem);
491 EXPORT_SYMBOL_GPL(rtnl_link_unregister);
493 static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
495 struct net_device *master_dev;
496 const struct rtnl_link_ops *ops;
501 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
505 ops = master_dev->rtnl_link_ops;
506 if (!ops || !ops->get_slave_size)
508 /* IFLA_INFO_SLAVE_DATA + nested data */
509 size = nla_total_size(sizeof(struct nlattr)) +
510 ops->get_slave_size(master_dev, dev);
517 static size_t rtnl_link_get_size(const struct net_device *dev)
519 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
525 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
526 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
529 /* IFLA_INFO_DATA + nested data */
530 size += nla_total_size(sizeof(struct nlattr)) +
533 if (ops->get_xstats_size)
534 /* IFLA_INFO_XSTATS */
535 size += nla_total_size(ops->get_xstats_size(dev));
537 size += rtnl_link_get_slave_info_data_size(dev);
542 static LIST_HEAD(rtnl_af_ops);
544 static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
546 const struct rtnl_af_ops *ops;
548 list_for_each_entry_rcu(ops, &rtnl_af_ops, list) {
549 if (ops->family == family)
557 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
558 * @ops: struct rtnl_af_ops * to register
560 * Returns 0 on success or a negative error code.
562 void rtnl_af_register(struct rtnl_af_ops *ops)
565 list_add_tail_rcu(&ops->list, &rtnl_af_ops);
568 EXPORT_SYMBOL_GPL(rtnl_af_register);
571 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
572 * @ops: struct rtnl_af_ops * to unregister
574 void rtnl_af_unregister(struct rtnl_af_ops *ops)
577 list_del_rcu(&ops->list);
582 EXPORT_SYMBOL_GPL(rtnl_af_unregister);
584 static size_t rtnl_link_get_af_size(const struct net_device *dev,
587 struct rtnl_af_ops *af_ops;
591 size = nla_total_size(sizeof(struct nlattr));
594 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
595 if (af_ops->get_link_af_size) {
596 /* AF_* + nested data */
597 size += nla_total_size(sizeof(struct nlattr)) +
598 af_ops->get_link_af_size(dev, ext_filter_mask);
606 static bool rtnl_have_link_slave_info(const struct net_device *dev)
608 struct net_device *master_dev;
613 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
614 if (master_dev && master_dev->rtnl_link_ops)
620 static int rtnl_link_slave_info_fill(struct sk_buff *skb,
621 const struct net_device *dev)
623 struct net_device *master_dev;
624 const struct rtnl_link_ops *ops;
625 struct nlattr *slave_data;
628 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
631 ops = master_dev->rtnl_link_ops;
634 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
636 if (ops->fill_slave_info) {
637 slave_data = nla_nest_start_noflag(skb, IFLA_INFO_SLAVE_DATA);
640 err = ops->fill_slave_info(skb, master_dev, dev);
642 goto err_cancel_slave_data;
643 nla_nest_end(skb, slave_data);
647 err_cancel_slave_data:
648 nla_nest_cancel(skb, slave_data);
652 static int rtnl_link_info_fill(struct sk_buff *skb,
653 const struct net_device *dev)
655 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
661 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
663 if (ops->fill_xstats) {
664 err = ops->fill_xstats(skb, dev);
668 if (ops->fill_info) {
669 data = nla_nest_start_noflag(skb, IFLA_INFO_DATA);
672 err = ops->fill_info(skb, dev);
674 goto err_cancel_data;
675 nla_nest_end(skb, data);
680 nla_nest_cancel(skb, data);
684 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
686 struct nlattr *linkinfo;
689 linkinfo = nla_nest_start_noflag(skb, IFLA_LINKINFO);
690 if (linkinfo == NULL)
693 err = rtnl_link_info_fill(skb, dev);
695 goto err_cancel_link;
697 err = rtnl_link_slave_info_fill(skb, dev);
699 goto err_cancel_link;
701 nla_nest_end(skb, linkinfo);
705 nla_nest_cancel(skb, linkinfo);
710 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
712 struct sock *rtnl = net->rtnl;
715 NETLINK_CB(skb).dst_group = group;
717 refcount_inc(&skb->users);
718 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
720 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
724 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
726 struct sock *rtnl = net->rtnl;
728 return nlmsg_unicast(rtnl, skb, pid);
730 EXPORT_SYMBOL(rtnl_unicast);
732 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
733 struct nlmsghdr *nlh, gfp_t flags)
735 struct sock *rtnl = net->rtnl;
739 report = nlmsg_report(nlh);
741 nlmsg_notify(rtnl, skb, pid, group, report, flags);
743 EXPORT_SYMBOL(rtnl_notify);
745 void rtnl_set_sk_err(struct net *net, u32 group, int error)
747 struct sock *rtnl = net->rtnl;
749 netlink_set_err(rtnl, 0, group, error);
751 EXPORT_SYMBOL(rtnl_set_sk_err);
753 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
758 mx = nla_nest_start_noflag(skb, RTA_METRICS);
762 for (i = 0; i < RTAX_MAX; i++) {
764 if (i == RTAX_CC_ALGO - 1) {
765 char tmp[TCP_CA_NAME_MAX], *name;
767 name = tcp_ca_get_name_by_key(metrics[i], tmp);
770 if (nla_put_string(skb, i + 1, name))
771 goto nla_put_failure;
772 } else if (i == RTAX_FEATURES - 1) {
773 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
777 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
778 if (nla_put_u32(skb, i + 1, user_features))
779 goto nla_put_failure;
781 if (nla_put_u32(skb, i + 1, metrics[i]))
782 goto nla_put_failure;
789 nla_nest_cancel(skb, mx);
793 return nla_nest_end(skb, mx);
796 nla_nest_cancel(skb, mx);
799 EXPORT_SYMBOL(rtnetlink_put_metrics);
801 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
802 long expires, u32 error)
804 struct rta_cacheinfo ci = {
810 ci.rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse);
811 ci.rta_used = dst->__use;
812 ci.rta_clntref = atomic_read(&dst->__refcnt);
817 clock = jiffies_to_clock_t(abs(expires));
818 clock = min_t(unsigned long, clock, INT_MAX);
819 ci.rta_expires = (expires > 0) ? clock : -clock;
821 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
823 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
825 static void set_operstate(struct net_device *dev, unsigned char transition)
827 unsigned char operstate = dev->operstate;
829 switch (transition) {
831 if ((operstate == IF_OPER_DORMANT ||
832 operstate == IF_OPER_UNKNOWN) &&
834 operstate = IF_OPER_UP;
837 case IF_OPER_DORMANT:
838 if (operstate == IF_OPER_UP ||
839 operstate == IF_OPER_UNKNOWN)
840 operstate = IF_OPER_DORMANT;
844 if (dev->operstate != operstate) {
845 write_lock_bh(&dev_base_lock);
846 dev->operstate = operstate;
847 write_unlock_bh(&dev_base_lock);
848 netdev_state_change(dev);
852 static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
854 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
855 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
858 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
859 const struct ifinfomsg *ifm)
861 unsigned int flags = ifm->ifi_flags;
863 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
865 flags = (flags & ifm->ifi_change) |
866 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
871 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
872 const struct rtnl_link_stats64 *b)
874 a->rx_packets = b->rx_packets;
875 a->tx_packets = b->tx_packets;
876 a->rx_bytes = b->rx_bytes;
877 a->tx_bytes = b->tx_bytes;
878 a->rx_errors = b->rx_errors;
879 a->tx_errors = b->tx_errors;
880 a->rx_dropped = b->rx_dropped;
881 a->tx_dropped = b->tx_dropped;
883 a->multicast = b->multicast;
884 a->collisions = b->collisions;
886 a->rx_length_errors = b->rx_length_errors;
887 a->rx_over_errors = b->rx_over_errors;
888 a->rx_crc_errors = b->rx_crc_errors;
889 a->rx_frame_errors = b->rx_frame_errors;
890 a->rx_fifo_errors = b->rx_fifo_errors;
891 a->rx_missed_errors = b->rx_missed_errors;
893 a->tx_aborted_errors = b->tx_aborted_errors;
894 a->tx_carrier_errors = b->tx_carrier_errors;
895 a->tx_fifo_errors = b->tx_fifo_errors;
896 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
897 a->tx_window_errors = b->tx_window_errors;
899 a->rx_compressed = b->rx_compressed;
900 a->tx_compressed = b->tx_compressed;
902 a->rx_nohandler = b->rx_nohandler;
906 static inline int rtnl_vfinfo_size(const struct net_device *dev,
909 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) {
910 int num_vfs = dev_num_vf(dev->dev.parent);
911 size_t size = nla_total_size(0);
914 nla_total_size(sizeof(struct ifla_vf_mac)) +
915 nla_total_size(sizeof(struct ifla_vf_vlan)) +
916 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */
917 nla_total_size(MAX_VLAN_LIST_LEN *
918 sizeof(struct ifla_vf_vlan_info)) +
919 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
920 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
921 nla_total_size(sizeof(struct ifla_vf_rate)) +
922 nla_total_size(sizeof(struct ifla_vf_link_state)) +
923 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
924 nla_total_size(0) + /* nest IFLA_VF_STATS */
925 /* IFLA_VF_STATS_RX_PACKETS */
926 nla_total_size_64bit(sizeof(__u64)) +
927 /* IFLA_VF_STATS_TX_PACKETS */
928 nla_total_size_64bit(sizeof(__u64)) +
929 /* IFLA_VF_STATS_RX_BYTES */
930 nla_total_size_64bit(sizeof(__u64)) +
931 /* IFLA_VF_STATS_TX_BYTES */
932 nla_total_size_64bit(sizeof(__u64)) +
933 /* IFLA_VF_STATS_BROADCAST */
934 nla_total_size_64bit(sizeof(__u64)) +
935 /* IFLA_VF_STATS_MULTICAST */
936 nla_total_size_64bit(sizeof(__u64)) +
937 /* IFLA_VF_STATS_RX_DROPPED */
938 nla_total_size_64bit(sizeof(__u64)) +
939 /* IFLA_VF_STATS_TX_DROPPED */
940 nla_total_size_64bit(sizeof(__u64)) +
941 nla_total_size(sizeof(struct ifla_vf_trust)));
947 static size_t rtnl_port_size(const struct net_device *dev,
950 size_t port_size = nla_total_size(4) /* PORT_VF */
951 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
952 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
953 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
954 + nla_total_size(1) /* PROT_VDP_REQUEST */
955 + nla_total_size(2); /* PORT_VDP_RESPONSE */
956 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
957 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
959 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
962 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
963 !(ext_filter_mask & RTEXT_FILTER_VF))
965 if (dev_num_vf(dev->dev.parent))
966 return port_self_size + vf_ports_size +
967 vf_port_size * dev_num_vf(dev->dev.parent);
969 return port_self_size;
972 static size_t rtnl_xdp_size(void)
974 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */
975 nla_total_size(1) + /* XDP_ATTACHED */
976 nla_total_size(4) + /* XDP_PROG_ID (or 1st mode) */
977 nla_total_size(4); /* XDP_<mode>_PROG_ID */
982 static noinline size_t if_nlmsg_size(const struct net_device *dev,
985 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
986 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
987 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
988 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
989 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
990 + nla_total_size(sizeof(struct rtnl_link_stats))
991 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
992 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
993 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
994 + nla_total_size(4) /* IFLA_TXQLEN */
995 + nla_total_size(4) /* IFLA_WEIGHT */
996 + nla_total_size(4) /* IFLA_MTU */
997 + nla_total_size(4) /* IFLA_LINK */
998 + nla_total_size(4) /* IFLA_MASTER */
999 + nla_total_size(1) /* IFLA_CARRIER */
1000 + nla_total_size(4) /* IFLA_PROMISCUITY */
1001 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
1002 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
1003 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
1004 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
1005 + nla_total_size(1) /* IFLA_OPERSTATE */
1006 + nla_total_size(1) /* IFLA_LINKMODE */
1007 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
1008 + nla_total_size(4) /* IFLA_LINK_NETNSID */
1009 + nla_total_size(4) /* IFLA_GROUP */
1010 + nla_total_size(ext_filter_mask
1011 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
1012 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
1013 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
1014 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
1015 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
1016 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
1017 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
1018 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
1019 + rtnl_xdp_size() /* IFLA_XDP */
1020 + nla_total_size(4) /* IFLA_EVENT */
1021 + nla_total_size(4) /* IFLA_NEW_NETNSID */
1022 + nla_total_size(4) /* IFLA_NEW_IFINDEX */
1023 + nla_total_size(1) /* IFLA_PROTO_DOWN */
1024 + nla_total_size(4) /* IFLA_TARGET_NETNSID */
1025 + nla_total_size(4) /* IFLA_CARRIER_UP_COUNT */
1026 + nla_total_size(4) /* IFLA_CARRIER_DOWN_COUNT */
1027 + nla_total_size(4) /* IFLA_MIN_MTU */
1028 + nla_total_size(4) /* IFLA_MAX_MTU */
1032 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
1034 struct nlattr *vf_ports;
1035 struct nlattr *vf_port;
1039 vf_ports = nla_nest_start_noflag(skb, IFLA_VF_PORTS);
1043 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
1044 vf_port = nla_nest_start_noflag(skb, IFLA_VF_PORT);
1046 goto nla_put_failure;
1047 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
1048 goto nla_put_failure;
1049 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
1050 if (err == -EMSGSIZE)
1051 goto nla_put_failure;
1053 nla_nest_cancel(skb, vf_port);
1056 nla_nest_end(skb, vf_port);
1059 nla_nest_end(skb, vf_ports);
1064 nla_nest_cancel(skb, vf_ports);
1068 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
1070 struct nlattr *port_self;
1073 port_self = nla_nest_start_noflag(skb, IFLA_PORT_SELF);
1077 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
1079 nla_nest_cancel(skb, port_self);
1080 return (err == -EMSGSIZE) ? err : 0;
1083 nla_nest_end(skb, port_self);
1088 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1089 u32 ext_filter_mask)
1093 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1094 !(ext_filter_mask & RTEXT_FILTER_VF))
1097 err = rtnl_port_self_fill(skb, dev);
1101 if (dev_num_vf(dev->dev.parent)) {
1102 err = rtnl_vf_ports_fill(skb, dev);
1110 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1113 struct netdev_phys_item_id ppid;
1115 err = dev_get_phys_port_id(dev, &ppid);
1117 if (err == -EOPNOTSUPP)
1122 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1128 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1130 char name[IFNAMSIZ];
1133 err = dev_get_phys_port_name(dev, name, sizeof(name));
1135 if (err == -EOPNOTSUPP)
1140 if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
1146 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1148 struct netdev_phys_item_id ppid = { };
1151 err = dev_get_port_parent_id(dev, &ppid, false);
1153 if (err == -EOPNOTSUPP)
1158 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, ppid.id_len, ppid.id))
1164 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1165 struct net_device *dev)
1167 struct rtnl_link_stats64 *sp;
1168 struct nlattr *attr;
1170 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1171 sizeof(struct rtnl_link_stats64), IFLA_PAD);
1175 sp = nla_data(attr);
1176 dev_get_stats(dev, sp);
1178 attr = nla_reserve(skb, IFLA_STATS,
1179 sizeof(struct rtnl_link_stats));
1183 copy_rtnl_link_stats(nla_data(attr), sp);
1188 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1189 struct net_device *dev,
1191 struct nlattr *vfinfo)
1193 struct ifla_vf_rss_query_en vf_rss_query_en;
1194 struct nlattr *vf, *vfstats, *vfvlanlist;
1195 struct ifla_vf_link_state vf_linkstate;
1196 struct ifla_vf_vlan_info vf_vlan_info;
1197 struct ifla_vf_spoofchk vf_spoofchk;
1198 struct ifla_vf_tx_rate vf_tx_rate;
1199 struct ifla_vf_stats vf_stats;
1200 struct ifla_vf_trust vf_trust;
1201 struct ifla_vf_vlan vf_vlan;
1202 struct ifla_vf_rate vf_rate;
1203 struct ifla_vf_mac vf_mac;
1204 struct ifla_vf_info ivi;
1206 memset(&ivi, 0, sizeof(ivi));
1208 /* Not all SR-IOV capable drivers support the
1209 * spoofcheck and "RSS query enable" query. Preset to
1210 * -1 so the user space tool can detect that the driver
1211 * didn't report anything.
1214 ivi.rss_query_en = -1;
1216 /* The default value for VF link state is "auto"
1217 * IFLA_VF_LINK_STATE_AUTO which equals zero
1220 /* VLAN Protocol by default is 802.1Q */
1221 ivi.vlan_proto = htons(ETH_P_8021Q);
1222 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1225 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
1234 vf_rss_query_en.vf =
1235 vf_trust.vf = ivi.vf;
1237 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1238 vf_vlan.vlan = ivi.vlan;
1239 vf_vlan.qos = ivi.qos;
1240 vf_vlan_info.vlan = ivi.vlan;
1241 vf_vlan_info.qos = ivi.qos;
1242 vf_vlan_info.vlan_proto = ivi.vlan_proto;
1243 vf_tx_rate.rate = ivi.max_tx_rate;
1244 vf_rate.min_tx_rate = ivi.min_tx_rate;
1245 vf_rate.max_tx_rate = ivi.max_tx_rate;
1246 vf_spoofchk.setting = ivi.spoofchk;
1247 vf_linkstate.link_state = ivi.linkstate;
1248 vf_rss_query_en.setting = ivi.rss_query_en;
1249 vf_trust.setting = ivi.trusted;
1250 vf = nla_nest_start_noflag(skb, IFLA_VF_INFO);
1252 goto nla_put_vfinfo_failure;
1253 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1254 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1255 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1257 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1259 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1261 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1263 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1264 sizeof(vf_rss_query_en),
1265 &vf_rss_query_en) ||
1266 nla_put(skb, IFLA_VF_TRUST,
1267 sizeof(vf_trust), &vf_trust))
1268 goto nla_put_vf_failure;
1269 vfvlanlist = nla_nest_start_noflag(skb, IFLA_VF_VLAN_LIST);
1271 goto nla_put_vf_failure;
1272 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1274 nla_nest_cancel(skb, vfvlanlist);
1275 goto nla_put_vf_failure;
1277 nla_nest_end(skb, vfvlanlist);
1278 memset(&vf_stats, 0, sizeof(vf_stats));
1279 if (dev->netdev_ops->ndo_get_vf_stats)
1280 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1282 vfstats = nla_nest_start_noflag(skb, IFLA_VF_STATS);
1284 goto nla_put_vf_failure;
1285 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1286 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1287 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1288 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1289 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1290 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1291 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1292 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1293 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1294 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1295 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
1296 vf_stats.multicast, IFLA_VF_STATS_PAD) ||
1297 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_DROPPED,
1298 vf_stats.rx_dropped, IFLA_VF_STATS_PAD) ||
1299 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_DROPPED,
1300 vf_stats.tx_dropped, IFLA_VF_STATS_PAD)) {
1301 nla_nest_cancel(skb, vfstats);
1302 goto nla_put_vf_failure;
1304 nla_nest_end(skb, vfstats);
1305 nla_nest_end(skb, vf);
1309 nla_nest_cancel(skb, vf);
1310 nla_put_vfinfo_failure:
1311 nla_nest_cancel(skb, vfinfo);
1315 static noinline_for_stack int rtnl_fill_vf(struct sk_buff *skb,
1316 struct net_device *dev,
1317 u32 ext_filter_mask)
1319 struct nlattr *vfinfo;
1322 if (!dev->dev.parent || ((ext_filter_mask & RTEXT_FILTER_VF) == 0))
1325 num_vfs = dev_num_vf(dev->dev.parent);
1326 if (nla_put_u32(skb, IFLA_NUM_VF, num_vfs))
1329 if (!dev->netdev_ops->ndo_get_vf_config)
1332 vfinfo = nla_nest_start_noflag(skb, IFLA_VFINFO_LIST);
1336 for (i = 0; i < num_vfs; i++) {
1337 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1341 nla_nest_end(skb, vfinfo);
1345 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1347 struct rtnl_link_ifmap map;
1349 memset(&map, 0, sizeof(map));
1350 map.mem_start = dev->mem_start;
1351 map.mem_end = dev->mem_end;
1352 map.base_addr = dev->base_addr;
1355 map.port = dev->if_port;
1357 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
1363 static u32 rtnl_xdp_prog_skb(struct net_device *dev)
1365 const struct bpf_prog *generic_xdp_prog;
1369 generic_xdp_prog = rtnl_dereference(dev->xdp_prog);
1370 if (!generic_xdp_prog)
1372 return generic_xdp_prog->aux->id;
1375 static u32 rtnl_xdp_prog_drv(struct net_device *dev)
1377 return __dev_xdp_query(dev, dev->netdev_ops->ndo_bpf, XDP_QUERY_PROG);
1380 static u32 rtnl_xdp_prog_hw(struct net_device *dev)
1382 return __dev_xdp_query(dev, dev->netdev_ops->ndo_bpf,
1386 static int rtnl_xdp_report_one(struct sk_buff *skb, struct net_device *dev,
1387 u32 *prog_id, u8 *mode, u8 tgt_mode, u32 attr,
1388 u32 (*get_prog_id)(struct net_device *dev))
1393 curr_id = get_prog_id(dev);
1398 err = nla_put_u32(skb, attr, curr_id);
1402 if (*mode != XDP_ATTACHED_NONE)
1403 *mode = XDP_ATTACHED_MULTI;
1410 static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1417 xdp = nla_nest_start_noflag(skb, IFLA_XDP);
1422 mode = XDP_ATTACHED_NONE;
1423 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_SKB,
1424 IFLA_XDP_SKB_PROG_ID, rtnl_xdp_prog_skb);
1427 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_DRV,
1428 IFLA_XDP_DRV_PROG_ID, rtnl_xdp_prog_drv);
1431 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_HW,
1432 IFLA_XDP_HW_PROG_ID, rtnl_xdp_prog_hw);
1436 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, mode);
1440 if (prog_id && mode != XDP_ATTACHED_MULTI) {
1441 err = nla_put_u32(skb, IFLA_XDP_PROG_ID, prog_id);
1446 nla_nest_end(skb, xdp);
1450 nla_nest_cancel(skb, xdp);
1454 static u32 rtnl_get_event(unsigned long event)
1456 u32 rtnl_event_type = IFLA_EVENT_NONE;
1460 rtnl_event_type = IFLA_EVENT_REBOOT;
1462 case NETDEV_FEAT_CHANGE:
1463 rtnl_event_type = IFLA_EVENT_FEATURES;
1465 case NETDEV_BONDING_FAILOVER:
1466 rtnl_event_type = IFLA_EVENT_BONDING_FAILOVER;
1468 case NETDEV_NOTIFY_PEERS:
1469 rtnl_event_type = IFLA_EVENT_NOTIFY_PEERS;
1471 case NETDEV_RESEND_IGMP:
1472 rtnl_event_type = IFLA_EVENT_IGMP_RESEND;
1474 case NETDEV_CHANGEINFODATA:
1475 rtnl_event_type = IFLA_EVENT_BONDING_OPTIONS;
1481 return rtnl_event_type;
1484 static int put_master_ifindex(struct sk_buff *skb, struct net_device *dev)
1486 const struct net_device *upper_dev;
1491 upper_dev = netdev_master_upper_dev_get_rcu(dev);
1493 ret = nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex);
1499 static int nla_put_iflink(struct sk_buff *skb, const struct net_device *dev,
1502 int ifindex = dev_get_iflink(dev);
1504 if (force || dev->ifindex != ifindex)
1505 return nla_put_u32(skb, IFLA_LINK, ifindex);
1510 static noinline_for_stack int nla_put_ifalias(struct sk_buff *skb,
1511 struct net_device *dev)
1516 ret = dev_get_alias(dev, buf, sizeof(buf));
1517 return ret > 0 ? nla_put_string(skb, IFLA_IFALIAS, buf) : 0;
1520 static int rtnl_fill_link_netnsid(struct sk_buff *skb,
1521 const struct net_device *dev,
1522 struct net *src_net)
1524 bool put_iflink = false;
1526 if (dev->rtnl_link_ops && dev->rtnl_link_ops->get_link_net) {
1527 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1529 if (!net_eq(dev_net(dev), link_net)) {
1530 int id = peernet2id_alloc(src_net, link_net);
1532 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1539 return nla_put_iflink(skb, dev, put_iflink);
1542 static int rtnl_fill_link_af(struct sk_buff *skb,
1543 const struct net_device *dev,
1544 u32 ext_filter_mask)
1546 const struct rtnl_af_ops *af_ops;
1547 struct nlattr *af_spec;
1549 af_spec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
1553 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
1557 if (!af_ops->fill_link_af)
1560 af = nla_nest_start_noflag(skb, af_ops->family);
1564 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1566 * Caller may return ENODATA to indicate that there
1567 * was no data to be dumped. This is not an error, it
1568 * means we should trim the attribute header and
1571 if (err == -ENODATA)
1572 nla_nest_cancel(skb, af);
1576 nla_nest_end(skb, af);
1579 nla_nest_end(skb, af_spec);
1583 static int rtnl_fill_ifinfo(struct sk_buff *skb,
1584 struct net_device *dev, struct net *src_net,
1585 int type, u32 pid, u32 seq, u32 change,
1586 unsigned int flags, u32 ext_filter_mask,
1587 u32 event, int *new_nsid, int new_ifindex,
1590 struct ifinfomsg *ifm;
1591 struct nlmsghdr *nlh;
1594 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1598 ifm = nlmsg_data(nlh);
1599 ifm->ifi_family = AF_UNSPEC;
1601 ifm->ifi_type = dev->type;
1602 ifm->ifi_index = dev->ifindex;
1603 ifm->ifi_flags = dev_get_flags(dev);
1604 ifm->ifi_change = change;
1606 if (tgt_netnsid >= 0 && nla_put_s32(skb, IFLA_TARGET_NETNSID, tgt_netnsid))
1607 goto nla_put_failure;
1609 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1610 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1611 nla_put_u8(skb, IFLA_OPERSTATE,
1612 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1613 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1614 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1615 nla_put_u32(skb, IFLA_MIN_MTU, dev->min_mtu) ||
1616 nla_put_u32(skb, IFLA_MAX_MTU, dev->max_mtu) ||
1617 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1618 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
1619 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1620 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1621 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1623 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1625 put_master_ifindex(skb, dev) ||
1626 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1628 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1629 nla_put_ifalias(skb, dev) ||
1630 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1631 atomic_read(&dev->carrier_up_count) +
1632 atomic_read(&dev->carrier_down_count)) ||
1633 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down) ||
1634 nla_put_u32(skb, IFLA_CARRIER_UP_COUNT,
1635 atomic_read(&dev->carrier_up_count)) ||
1636 nla_put_u32(skb, IFLA_CARRIER_DOWN_COUNT,
1637 atomic_read(&dev->carrier_down_count)))
1638 goto nla_put_failure;
1640 if (event != IFLA_EVENT_NONE) {
1641 if (nla_put_u32(skb, IFLA_EVENT, event))
1642 goto nla_put_failure;
1645 if (rtnl_fill_link_ifmap(skb, dev))
1646 goto nla_put_failure;
1648 if (dev->addr_len) {
1649 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1650 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1651 goto nla_put_failure;
1654 if (rtnl_phys_port_id_fill(skb, dev))
1655 goto nla_put_failure;
1657 if (rtnl_phys_port_name_fill(skb, dev))
1658 goto nla_put_failure;
1660 if (rtnl_phys_switch_id_fill(skb, dev))
1661 goto nla_put_failure;
1663 if (rtnl_fill_stats(skb, dev))
1664 goto nla_put_failure;
1666 if (rtnl_fill_vf(skb, dev, ext_filter_mask))
1667 goto nla_put_failure;
1669 if (rtnl_port_fill(skb, dev, ext_filter_mask))
1670 goto nla_put_failure;
1672 if (rtnl_xdp_fill(skb, dev))
1673 goto nla_put_failure;
1675 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1676 if (rtnl_link_fill(skb, dev) < 0)
1677 goto nla_put_failure;
1680 if (rtnl_fill_link_netnsid(skb, dev, src_net))
1681 goto nla_put_failure;
1684 nla_put_s32(skb, IFLA_NEW_NETNSID, *new_nsid) < 0)
1685 goto nla_put_failure;
1687 nla_put_s32(skb, IFLA_NEW_IFINDEX, new_ifindex) < 0)
1688 goto nla_put_failure;
1692 if (rtnl_fill_link_af(skb, dev, ext_filter_mask))
1693 goto nla_put_failure_rcu;
1696 nlmsg_end(skb, nlh);
1699 nla_put_failure_rcu:
1702 nlmsg_cancel(skb, nlh);
1706 static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1707 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1708 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1709 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1710 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1711 [IFLA_MTU] = { .type = NLA_U32 },
1712 [IFLA_LINK] = { .type = NLA_U32 },
1713 [IFLA_MASTER] = { .type = NLA_U32 },
1714 [IFLA_CARRIER] = { .type = NLA_U8 },
1715 [IFLA_TXQLEN] = { .type = NLA_U32 },
1716 [IFLA_WEIGHT] = { .type = NLA_U32 },
1717 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1718 [IFLA_LINKMODE] = { .type = NLA_U8 },
1719 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1720 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1721 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1722 /* IFLA_IFALIAS is a string, but policy is set to NLA_BINARY to
1723 * allow 0-length string (needed to remove an alias).
1725 [IFLA_IFALIAS] = { .type = NLA_BINARY, .len = IFALIASZ - 1 },
1726 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1727 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1728 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1729 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1730 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1731 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1732 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1733 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1734 [IFLA_GSO_MAX_SEGS] = { .type = NLA_U32 },
1735 [IFLA_GSO_MAX_SIZE] = { .type = NLA_U32 },
1736 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1737 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
1738 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1739 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
1740 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
1741 [IFLA_XDP] = { .type = NLA_NESTED },
1742 [IFLA_EVENT] = { .type = NLA_U32 },
1743 [IFLA_GROUP] = { .type = NLA_U32 },
1744 [IFLA_TARGET_NETNSID] = { .type = NLA_S32 },
1745 [IFLA_CARRIER_UP_COUNT] = { .type = NLA_U32 },
1746 [IFLA_CARRIER_DOWN_COUNT] = { .type = NLA_U32 },
1747 [IFLA_MIN_MTU] = { .type = NLA_U32 },
1748 [IFLA_MAX_MTU] = { .type = NLA_U32 },
1751 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1752 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1753 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1754 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1755 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
1758 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1759 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1760 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1761 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
1762 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1763 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1764 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1765 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
1766 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
1767 [IFLA_VF_STATS] = { .type = NLA_NESTED },
1768 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
1769 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1770 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1773 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1774 [IFLA_PORT_VF] = { .type = NLA_U32 },
1775 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1776 .len = PORT_PROFILE_MAX },
1777 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1778 .len = PORT_UUID_MAX },
1779 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1780 .len = PORT_UUID_MAX },
1781 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1782 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1784 /* Unused, but we need to keep it here since user space could
1785 * fill it. It's also broken with regard to NLA_BINARY use in
1786 * combination with structs.
1788 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1789 .len = sizeof(struct ifla_port_vsi) },
1792 static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
1793 [IFLA_XDP_FD] = { .type = NLA_S32 },
1794 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
1795 [IFLA_XDP_FLAGS] = { .type = NLA_U32 },
1796 [IFLA_XDP_PROG_ID] = { .type = NLA_U32 },
1799 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1801 const struct rtnl_link_ops *ops = NULL;
1802 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1804 if (nla_parse_nested_deprecated(linfo, IFLA_INFO_MAX, nla, ifla_info_policy, NULL) < 0)
1807 if (linfo[IFLA_INFO_KIND]) {
1808 char kind[MODULE_NAME_LEN];
1810 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1811 ops = rtnl_link_ops_get(kind);
1817 static bool link_master_filtered(struct net_device *dev, int master_idx)
1819 struct net_device *master;
1824 master = netdev_master_upper_dev_get(dev);
1825 if (!master || master->ifindex != master_idx)
1831 static bool link_kind_filtered(const struct net_device *dev,
1832 const struct rtnl_link_ops *kind_ops)
1834 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1840 static bool link_dump_filtered(struct net_device *dev,
1842 const struct rtnl_link_ops *kind_ops)
1844 if (link_master_filtered(dev, master_idx) ||
1845 link_kind_filtered(dev, kind_ops))
1852 * rtnl_get_net_ns_capable - Get netns if sufficiently privileged.
1853 * @sk: netlink socket
1854 * @netnsid: network namespace identifier
1856 * Returns the network namespace identified by netnsid on success or an error
1857 * pointer on failure.
1859 struct net *rtnl_get_net_ns_capable(struct sock *sk, int netnsid)
1863 net = get_net_ns_by_id(sock_net(sk), netnsid);
1865 return ERR_PTR(-EINVAL);
1867 /* For now, the caller is required to have CAP_NET_ADMIN in
1868 * the user namespace owning the target net ns.
1870 if (!sk_ns_capable(sk, net->user_ns, CAP_NET_ADMIN)) {
1872 return ERR_PTR(-EACCES);
1876 EXPORT_SYMBOL_GPL(rtnl_get_net_ns_capable);
1878 static int rtnl_valid_dump_ifinfo_req(const struct nlmsghdr *nlh,
1879 bool strict_check, struct nlattr **tb,
1880 struct netlink_ext_ack *extack)
1885 struct ifinfomsg *ifm;
1887 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
1888 NL_SET_ERR_MSG(extack, "Invalid header for link dump");
1892 ifm = nlmsg_data(nlh);
1893 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
1895 NL_SET_ERR_MSG(extack, "Invalid values in header for link dump request");
1898 if (ifm->ifi_index) {
1899 NL_SET_ERR_MSG(extack, "Filter by device index not supported for link dumps");
1903 return nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb,
1904 IFLA_MAX, ifla_policy,
1908 /* A hack to preserve kernel<->userspace interface.
1909 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1910 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1911 * what iproute2 < v3.9.0 used.
1912 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1913 * attribute, its netlink message is shorter than struct ifinfomsg.
1915 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
1916 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1918 return nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy,
1922 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1924 struct netlink_ext_ack *extack = cb->extack;
1925 const struct nlmsghdr *nlh = cb->nlh;
1926 struct net *net = sock_net(skb->sk);
1927 struct net *tgt_net = net;
1930 struct net_device *dev;
1931 struct hlist_head *head;
1932 struct nlattr *tb[IFLA_MAX+1];
1933 u32 ext_filter_mask = 0;
1934 const struct rtnl_link_ops *kind_ops = NULL;
1935 unsigned int flags = NLM_F_MULTI;
1941 s_idx = cb->args[1];
1943 err = rtnl_valid_dump_ifinfo_req(nlh, cb->strict_check, tb, extack);
1945 if (cb->strict_check)
1951 for (i = 0; i <= IFLA_MAX; ++i) {
1955 /* new attributes should only be added with strict checking */
1957 case IFLA_TARGET_NETNSID:
1958 netnsid = nla_get_s32(tb[i]);
1959 tgt_net = rtnl_get_net_ns_capable(skb->sk, netnsid);
1960 if (IS_ERR(tgt_net)) {
1961 NL_SET_ERR_MSG(extack, "Invalid target network namespace id");
1962 return PTR_ERR(tgt_net);
1966 ext_filter_mask = nla_get_u32(tb[i]);
1969 master_idx = nla_get_u32(tb[i]);
1972 kind_ops = linkinfo_to_kind_ops(tb[i]);
1975 if (cb->strict_check) {
1976 NL_SET_ERR_MSG(extack, "Unsupported attribute in link dump request");
1982 if (master_idx || kind_ops)
1983 flags |= NLM_F_DUMP_FILTERED;
1986 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1988 head = &tgt_net->dev_index_head[h];
1989 hlist_for_each_entry(dev, head, index_hlist) {
1990 if (link_dump_filtered(dev, master_idx, kind_ops))
1994 err = rtnl_fill_ifinfo(skb, dev, net,
1996 NETLINK_CB(cb->skb).portid,
1997 nlh->nlmsg_seq, 0, flags,
1998 ext_filter_mask, 0, NULL, 0,
2002 if (likely(skb->len))
2016 cb->seq = net->dev_base_seq;
2017 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
2024 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
2025 struct netlink_ext_ack *exterr)
2027 return nla_parse_deprecated(tb, IFLA_MAX, head, len, ifla_policy,
2030 EXPORT_SYMBOL(rtnl_nla_parse_ifla);
2032 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
2035 /* Examine the link attributes and figure out which
2036 * network namespace we are talking about.
2038 if (tb[IFLA_NET_NS_PID])
2039 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
2040 else if (tb[IFLA_NET_NS_FD])
2041 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
2043 net = get_net(src_net);
2046 EXPORT_SYMBOL(rtnl_link_get_net);
2048 /* Figure out which network namespace we are talking about by
2049 * examining the link attributes in the following order:
2051 * 1. IFLA_NET_NS_PID
2053 * 3. IFLA_TARGET_NETNSID
2055 static struct net *rtnl_link_get_net_by_nlattr(struct net *src_net,
2056 struct nlattr *tb[])
2060 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD])
2061 return rtnl_link_get_net(src_net, tb);
2063 if (!tb[IFLA_TARGET_NETNSID])
2064 return get_net(src_net);
2066 net = get_net_ns_by_id(src_net, nla_get_u32(tb[IFLA_TARGET_NETNSID]));
2068 return ERR_PTR(-EINVAL);
2073 static struct net *rtnl_link_get_net_capable(const struct sk_buff *skb,
2074 struct net *src_net,
2075 struct nlattr *tb[], int cap)
2079 net = rtnl_link_get_net_by_nlattr(src_net, tb);
2083 if (!netlink_ns_capable(skb, net->user_ns, cap)) {
2085 return ERR_PTR(-EPERM);
2091 /* Verify that rtnetlink requests do not pass additional properties
2092 * potentially referring to different network namespaces.
2094 static int rtnl_ensure_unique_netns(struct nlattr *tb[],
2095 struct netlink_ext_ack *extack,
2099 if (netns_id_only) {
2100 if (!tb[IFLA_NET_NS_PID] && !tb[IFLA_NET_NS_FD])
2103 NL_SET_ERR_MSG(extack, "specified netns attribute not supported");
2107 if (tb[IFLA_TARGET_NETNSID] && (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]))
2110 if (tb[IFLA_NET_NS_PID] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_FD]))
2113 if (tb[IFLA_NET_NS_FD] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_PID]))
2119 NL_SET_ERR_MSG(extack, "multiple netns identifying attributes specified");
2123 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
2126 if (tb[IFLA_ADDRESS] &&
2127 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
2130 if (tb[IFLA_BROADCAST] &&
2131 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
2135 if (tb[IFLA_AF_SPEC]) {
2139 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2140 const struct rtnl_af_ops *af_ops;
2143 af_ops = rtnl_af_lookup(nla_type(af));
2146 return -EAFNOSUPPORT;
2149 if (!af_ops->set_link_af) {
2154 if (af_ops->validate_link_af) {
2155 err = af_ops->validate_link_af(dev, af);
2169 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
2172 const struct net_device_ops *ops = dev->netdev_ops;
2174 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
2177 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
2179 if (dev->type != ARPHRD_INFINIBAND)
2182 return handle_infiniband_guid(dev, ivt, guid_type);
2185 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
2187 const struct net_device_ops *ops = dev->netdev_ops;
2190 if (tb[IFLA_VF_MAC]) {
2191 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
2194 if (ops->ndo_set_vf_mac)
2195 err = ops->ndo_set_vf_mac(dev, ivm->vf,
2201 if (tb[IFLA_VF_VLAN]) {
2202 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
2205 if (ops->ndo_set_vf_vlan)
2206 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
2208 htons(ETH_P_8021Q));
2213 if (tb[IFLA_VF_VLAN_LIST]) {
2214 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
2215 struct nlattr *attr;
2219 if (!ops->ndo_set_vf_vlan)
2222 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
2223 if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
2224 nla_len(attr) < NLA_HDRLEN) {
2227 if (len >= MAX_VLAN_LIST_LEN)
2229 ivvl[len] = nla_data(attr);
2236 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
2237 ivvl[0]->qos, ivvl[0]->vlan_proto);
2242 if (tb[IFLA_VF_TX_RATE]) {
2243 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
2244 struct ifla_vf_info ivf;
2247 if (ops->ndo_get_vf_config)
2248 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
2253 if (ops->ndo_set_vf_rate)
2254 err = ops->ndo_set_vf_rate(dev, ivt->vf,
2261 if (tb[IFLA_VF_RATE]) {
2262 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
2265 if (ops->ndo_set_vf_rate)
2266 err = ops->ndo_set_vf_rate(dev, ivt->vf,
2273 if (tb[IFLA_VF_SPOOFCHK]) {
2274 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
2277 if (ops->ndo_set_vf_spoofchk)
2278 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
2284 if (tb[IFLA_VF_LINK_STATE]) {
2285 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
2288 if (ops->ndo_set_vf_link_state)
2289 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
2295 if (tb[IFLA_VF_RSS_QUERY_EN]) {
2296 struct ifla_vf_rss_query_en *ivrssq_en;
2299 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
2300 if (ops->ndo_set_vf_rss_query_en)
2301 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
2302 ivrssq_en->setting);
2307 if (tb[IFLA_VF_TRUST]) {
2308 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
2311 if (ops->ndo_set_vf_trust)
2312 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
2317 if (tb[IFLA_VF_IB_NODE_GUID]) {
2318 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
2320 if (!ops->ndo_set_vf_guid)
2323 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
2326 if (tb[IFLA_VF_IB_PORT_GUID]) {
2327 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
2329 if (!ops->ndo_set_vf_guid)
2332 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
2338 static int do_set_master(struct net_device *dev, int ifindex,
2339 struct netlink_ext_ack *extack)
2341 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
2342 const struct net_device_ops *ops;
2346 if (upper_dev->ifindex == ifindex)
2348 ops = upper_dev->netdev_ops;
2349 if (ops->ndo_del_slave) {
2350 err = ops->ndo_del_slave(upper_dev, dev);
2359 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
2362 ops = upper_dev->netdev_ops;
2363 if (ops->ndo_add_slave) {
2364 err = ops->ndo_add_slave(upper_dev, dev, extack);
2374 #define DO_SETLINK_MODIFIED 0x01
2375 /* notify flag means notify + modified. */
2376 #define DO_SETLINK_NOTIFY 0x03
2377 static int do_setlink(const struct sk_buff *skb,
2378 struct net_device *dev, struct ifinfomsg *ifm,
2379 struct netlink_ext_ack *extack,
2380 struct nlattr **tb, char *ifname, int status)
2382 const struct net_device_ops *ops = dev->netdev_ops;
2385 err = validate_linkmsg(dev, tb);
2389 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD] || tb[IFLA_TARGET_NETNSID]) {
2390 struct net *net = rtnl_link_get_net_capable(skb, dev_net(dev),
2397 err = dev_change_net_namespace(dev, net, ifname);
2401 status |= DO_SETLINK_MODIFIED;
2405 struct rtnl_link_ifmap *u_map;
2408 if (!ops->ndo_set_config) {
2413 if (!netif_device_present(dev)) {
2418 u_map = nla_data(tb[IFLA_MAP]);
2419 k_map.mem_start = (unsigned long) u_map->mem_start;
2420 k_map.mem_end = (unsigned long) u_map->mem_end;
2421 k_map.base_addr = (unsigned short) u_map->base_addr;
2422 k_map.irq = (unsigned char) u_map->irq;
2423 k_map.dma = (unsigned char) u_map->dma;
2424 k_map.port = (unsigned char) u_map->port;
2426 err = ops->ndo_set_config(dev, &k_map);
2430 status |= DO_SETLINK_NOTIFY;
2433 if (tb[IFLA_ADDRESS]) {
2434 struct sockaddr *sa;
2437 len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len,
2439 sa = kmalloc(len, GFP_KERNEL);
2444 sa->sa_family = dev->type;
2445 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
2447 err = dev_set_mac_address(dev, sa, extack);
2451 status |= DO_SETLINK_MODIFIED;
2455 err = dev_set_mtu_ext(dev, nla_get_u32(tb[IFLA_MTU]), extack);
2458 status |= DO_SETLINK_MODIFIED;
2461 if (tb[IFLA_GROUP]) {
2462 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2463 status |= DO_SETLINK_NOTIFY;
2467 * Interface selected by interface index but interface
2468 * name provided implies that a name change has been
2471 if (ifm->ifi_index > 0 && ifname[0]) {
2472 err = dev_change_name(dev, ifname);
2475 status |= DO_SETLINK_MODIFIED;
2478 if (tb[IFLA_IFALIAS]) {
2479 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2480 nla_len(tb[IFLA_IFALIAS]));
2483 status |= DO_SETLINK_NOTIFY;
2486 if (tb[IFLA_BROADCAST]) {
2487 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
2488 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
2491 if (ifm->ifi_flags || ifm->ifi_change) {
2492 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
2498 if (tb[IFLA_MASTER]) {
2499 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
2502 status |= DO_SETLINK_MODIFIED;
2505 if (tb[IFLA_CARRIER]) {
2506 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2509 status |= DO_SETLINK_MODIFIED;
2512 if (tb[IFLA_TXQLEN]) {
2513 unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]);
2515 err = dev_change_tx_queue_len(dev, value);
2518 status |= DO_SETLINK_MODIFIED;
2521 if (tb[IFLA_GSO_MAX_SIZE]) {
2522 u32 max_size = nla_get_u32(tb[IFLA_GSO_MAX_SIZE]);
2524 if (max_size > GSO_MAX_SIZE) {
2529 if (dev->gso_max_size ^ max_size) {
2530 netif_set_gso_max_size(dev, max_size);
2531 status |= DO_SETLINK_MODIFIED;
2535 if (tb[IFLA_GSO_MAX_SEGS]) {
2536 u32 max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
2538 if (max_segs > GSO_MAX_SEGS) {
2543 if (dev->gso_max_segs ^ max_segs) {
2544 dev->gso_max_segs = max_segs;
2545 status |= DO_SETLINK_MODIFIED;
2549 if (tb[IFLA_OPERSTATE])
2550 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2552 if (tb[IFLA_LINKMODE]) {
2553 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2555 write_lock_bh(&dev_base_lock);
2556 if (dev->link_mode ^ value)
2557 status |= DO_SETLINK_NOTIFY;
2558 dev->link_mode = value;
2559 write_unlock_bh(&dev_base_lock);
2562 if (tb[IFLA_VFINFO_LIST]) {
2563 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
2564 struct nlattr *attr;
2567 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
2568 if (nla_type(attr) != IFLA_VF_INFO ||
2569 nla_len(attr) < NLA_HDRLEN) {
2573 err = nla_parse_nested_deprecated(vfinfo, IFLA_VF_MAX,
2579 err = do_setvfinfo(dev, vfinfo);
2582 status |= DO_SETLINK_NOTIFY;
2587 if (tb[IFLA_VF_PORTS]) {
2588 struct nlattr *port[IFLA_PORT_MAX+1];
2589 struct nlattr *attr;
2594 if (!ops->ndo_set_vf_port)
2597 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
2598 if (nla_type(attr) != IFLA_VF_PORT ||
2599 nla_len(attr) < NLA_HDRLEN) {
2603 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
2609 if (!port[IFLA_PORT_VF]) {
2613 vf = nla_get_u32(port[IFLA_PORT_VF]);
2614 err = ops->ndo_set_vf_port(dev, vf, port);
2617 status |= DO_SETLINK_NOTIFY;
2622 if (tb[IFLA_PORT_SELF]) {
2623 struct nlattr *port[IFLA_PORT_MAX+1];
2625 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
2627 ifla_port_policy, NULL);
2632 if (ops->ndo_set_vf_port)
2633 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2636 status |= DO_SETLINK_NOTIFY;
2639 if (tb[IFLA_AF_SPEC]) {
2643 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2644 const struct rtnl_af_ops *af_ops;
2648 BUG_ON(!(af_ops = rtnl_af_lookup(nla_type(af))));
2650 err = af_ops->set_link_af(dev, af);
2657 status |= DO_SETLINK_NOTIFY;
2662 if (tb[IFLA_PROTO_DOWN]) {
2663 err = dev_change_proto_down(dev,
2664 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2667 status |= DO_SETLINK_NOTIFY;
2671 struct nlattr *xdp[IFLA_XDP_MAX + 1];
2674 err = nla_parse_nested_deprecated(xdp, IFLA_XDP_MAX,
2676 ifla_xdp_policy, NULL);
2680 if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) {
2685 if (xdp[IFLA_XDP_FLAGS]) {
2686 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
2687 if (xdp_flags & ~XDP_FLAGS_MASK) {
2691 if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) {
2697 if (xdp[IFLA_XDP_FD]) {
2698 err = dev_change_xdp_fd(dev, extack,
2699 nla_get_s32(xdp[IFLA_XDP_FD]),
2703 status |= DO_SETLINK_NOTIFY;
2708 if (status & DO_SETLINK_MODIFIED) {
2709 if ((status & DO_SETLINK_NOTIFY) == DO_SETLINK_NOTIFY)
2710 netdev_state_change(dev);
2713 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",
2720 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2721 struct netlink_ext_ack *extack)
2723 struct net *net = sock_net(skb->sk);
2724 struct ifinfomsg *ifm;
2725 struct net_device *dev;
2727 struct nlattr *tb[IFLA_MAX+1];
2728 char ifname[IFNAMSIZ];
2730 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
2731 ifla_policy, extack);
2735 err = rtnl_ensure_unique_netns(tb, extack, false);
2739 if (tb[IFLA_IFNAME])
2740 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2745 ifm = nlmsg_data(nlh);
2746 if (ifm->ifi_index > 0)
2747 dev = __dev_get_by_index(net, ifm->ifi_index);
2748 else if (tb[IFLA_IFNAME])
2749 dev = __dev_get_by_name(net, ifname);
2758 err = do_setlink(skb, dev, ifm, extack, tb, ifname, 0);
2763 static int rtnl_group_dellink(const struct net *net, int group)
2765 struct net_device *dev, *aux;
2766 LIST_HEAD(list_kill);
2772 for_each_netdev(net, dev) {
2773 if (dev->group == group) {
2774 const struct rtnl_link_ops *ops;
2777 ops = dev->rtnl_link_ops;
2778 if (!ops || !ops->dellink)
2786 for_each_netdev_safe(net, dev, aux) {
2787 if (dev->group == group) {
2788 const struct rtnl_link_ops *ops;
2790 ops = dev->rtnl_link_ops;
2791 ops->dellink(dev, &list_kill);
2794 unregister_netdevice_many(&list_kill);
2799 int rtnl_delete_link(struct net_device *dev)
2801 const struct rtnl_link_ops *ops;
2802 LIST_HEAD(list_kill);
2804 ops = dev->rtnl_link_ops;
2805 if (!ops || !ops->dellink)
2808 ops->dellink(dev, &list_kill);
2809 unregister_netdevice_many(&list_kill);
2813 EXPORT_SYMBOL_GPL(rtnl_delete_link);
2815 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
2816 struct netlink_ext_ack *extack)
2818 struct net *net = sock_net(skb->sk);
2819 struct net *tgt_net = net;
2820 struct net_device *dev = NULL;
2821 struct ifinfomsg *ifm;
2822 char ifname[IFNAMSIZ];
2823 struct nlattr *tb[IFLA_MAX+1];
2827 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
2828 ifla_policy, extack);
2832 err = rtnl_ensure_unique_netns(tb, extack, true);
2836 if (tb[IFLA_IFNAME])
2837 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2839 if (tb[IFLA_TARGET_NETNSID]) {
2840 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
2841 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
2842 if (IS_ERR(tgt_net))
2843 return PTR_ERR(tgt_net);
2847 ifm = nlmsg_data(nlh);
2848 if (ifm->ifi_index > 0)
2849 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
2850 else if (tb[IFLA_IFNAME])
2851 dev = __dev_get_by_name(tgt_net, ifname);
2852 else if (tb[IFLA_GROUP])
2853 err = rtnl_group_dellink(tgt_net, nla_get_u32(tb[IFLA_GROUP]));
2858 if (tb[IFLA_IFNAME] || ifm->ifi_index > 0)
2864 err = rtnl_delete_link(dev);
2873 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2875 unsigned int old_flags;
2878 old_flags = dev->flags;
2879 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2880 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
2886 if (dev->rtnl_link_state == RTNL_LINK_INITIALIZED) {
2887 __dev_notify_flags(dev, old_flags, (old_flags ^ dev->flags));
2889 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
2890 __dev_notify_flags(dev, old_flags, ~0U);
2894 EXPORT_SYMBOL(rtnl_configure_link);
2896 struct net_device *rtnl_create_link(struct net *net, const char *ifname,
2897 unsigned char name_assign_type,
2898 const struct rtnl_link_ops *ops,
2899 struct nlattr *tb[],
2900 struct netlink_ext_ack *extack)
2902 struct net_device *dev;
2903 unsigned int num_tx_queues = 1;
2904 unsigned int num_rx_queues = 1;
2906 if (tb[IFLA_NUM_TX_QUEUES])
2907 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2908 else if (ops->get_num_tx_queues)
2909 num_tx_queues = ops->get_num_tx_queues();
2911 if (tb[IFLA_NUM_RX_QUEUES])
2912 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2913 else if (ops->get_num_rx_queues)
2914 num_rx_queues = ops->get_num_rx_queues();
2916 if (num_tx_queues < 1 || num_tx_queues > 4096) {
2917 NL_SET_ERR_MSG(extack, "Invalid number of transmit queues");
2918 return ERR_PTR(-EINVAL);
2921 if (num_rx_queues < 1 || num_rx_queues > 4096) {
2922 NL_SET_ERR_MSG(extack, "Invalid number of receive queues");
2923 return ERR_PTR(-EINVAL);
2926 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
2927 ops->setup, num_tx_queues, num_rx_queues);
2929 return ERR_PTR(-ENOMEM);
2931 dev_net_set(dev, net);
2932 dev->rtnl_link_ops = ops;
2933 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
2936 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2937 if (tb[IFLA_ADDRESS]) {
2938 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2939 nla_len(tb[IFLA_ADDRESS]));
2940 dev->addr_assign_type = NET_ADDR_SET;
2942 if (tb[IFLA_BROADCAST])
2943 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2944 nla_len(tb[IFLA_BROADCAST]));
2945 if (tb[IFLA_TXQLEN])
2946 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2947 if (tb[IFLA_OPERSTATE])
2948 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2949 if (tb[IFLA_LINKMODE])
2950 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
2952 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2953 if (tb[IFLA_GSO_MAX_SIZE])
2954 netif_set_gso_max_size(dev, nla_get_u32(tb[IFLA_GSO_MAX_SIZE]));
2955 if (tb[IFLA_GSO_MAX_SEGS])
2956 dev->gso_max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
2960 EXPORT_SYMBOL(rtnl_create_link);
2962 static int rtnl_group_changelink(const struct sk_buff *skb,
2963 struct net *net, int group,
2964 struct ifinfomsg *ifm,
2965 struct netlink_ext_ack *extack,
2968 struct net_device *dev, *aux;
2971 for_each_netdev_safe(net, dev, aux) {
2972 if (dev->group == group) {
2973 err = do_setlink(skb, dev, ifm, extack, tb, NULL, 0);
2982 static int __rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2983 struct nlattr **attr, struct netlink_ext_ack *extack)
2985 struct nlattr *slave_attr[RTNL_SLAVE_MAX_TYPE + 1];
2986 unsigned char name_assign_type = NET_NAME_USER;
2987 struct nlattr *linkinfo[IFLA_INFO_MAX + 1];
2988 const struct rtnl_link_ops *m_ops = NULL;
2989 struct net_device *master_dev = NULL;
2990 struct net *net = sock_net(skb->sk);
2991 const struct rtnl_link_ops *ops;
2992 struct nlattr *tb[IFLA_MAX + 1];
2993 struct net *dest_net, *link_net;
2994 struct nlattr **slave_data;
2995 char kind[MODULE_NAME_LEN];
2996 struct net_device *dev;
2997 struct ifinfomsg *ifm;
2998 char ifname[IFNAMSIZ];
2999 struct nlattr **data;
3002 #ifdef CONFIG_MODULES
3005 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3006 ifla_policy, extack);
3010 err = rtnl_ensure_unique_netns(tb, extack, false);
3014 if (tb[IFLA_IFNAME])
3015 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3019 ifm = nlmsg_data(nlh);
3020 if (ifm->ifi_index > 0)
3021 dev = __dev_get_by_index(net, ifm->ifi_index);
3024 dev = __dev_get_by_name(net, ifname);
3030 master_dev = netdev_master_upper_dev_get(dev);
3032 m_ops = master_dev->rtnl_link_ops;
3035 err = validate_linkmsg(dev, tb);
3039 if (tb[IFLA_LINKINFO]) {
3040 err = nla_parse_nested_deprecated(linkinfo, IFLA_INFO_MAX,
3042 ifla_info_policy, NULL);
3046 memset(linkinfo, 0, sizeof(linkinfo));
3048 if (linkinfo[IFLA_INFO_KIND]) {
3049 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
3050 ops = rtnl_link_ops_get(kind);
3058 if (ops->maxtype > RTNL_MAX_TYPE)
3061 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
3062 err = nla_parse_nested_deprecated(attr, ops->maxtype,
3063 linkinfo[IFLA_INFO_DATA],
3064 ops->policy, extack);
3069 if (ops->validate) {
3070 err = ops->validate(tb, data, extack);
3078 if (m_ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE)
3081 if (m_ops->slave_maxtype &&
3082 linkinfo[IFLA_INFO_SLAVE_DATA]) {
3083 err = nla_parse_nested_deprecated(slave_attr,
3084 m_ops->slave_maxtype,
3085 linkinfo[IFLA_INFO_SLAVE_DATA],
3086 m_ops->slave_policy,
3090 slave_data = slave_attr;
3097 if (nlh->nlmsg_flags & NLM_F_EXCL)
3099 if (nlh->nlmsg_flags & NLM_F_REPLACE)
3102 if (linkinfo[IFLA_INFO_DATA]) {
3103 if (!ops || ops != dev->rtnl_link_ops ||
3107 err = ops->changelink(dev, tb, data, extack);
3110 status |= DO_SETLINK_NOTIFY;
3113 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
3114 if (!m_ops || !m_ops->slave_changelink)
3117 err = m_ops->slave_changelink(master_dev, dev, tb,
3118 slave_data, extack);
3121 status |= DO_SETLINK_NOTIFY;
3124 return do_setlink(skb, dev, ifm, extack, tb, ifname, status);
3127 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
3128 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
3129 return rtnl_group_changelink(skb, net,
3130 nla_get_u32(tb[IFLA_GROUP]),
3135 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
3139 #ifdef CONFIG_MODULES
3142 request_module("rtnl-link-%s", kind);
3144 ops = rtnl_link_ops_get(kind);
3149 NL_SET_ERR_MSG(extack, "Unknown device type");
3157 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
3158 name_assign_type = NET_NAME_ENUM;
3161 dest_net = rtnl_link_get_net_capable(skb, net, tb, CAP_NET_ADMIN);
3162 if (IS_ERR(dest_net))
3163 return PTR_ERR(dest_net);
3165 if (tb[IFLA_LINK_NETNSID]) {
3166 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
3168 link_net = get_net_ns_by_id(dest_net, id);
3170 NL_SET_ERR_MSG(extack, "Unknown network namespace id");
3175 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
3181 dev = rtnl_create_link(link_net ? : dest_net, ifname,
3182 name_assign_type, ops, tb, extack);
3188 dev->ifindex = ifm->ifi_index;
3191 err = ops->newlink(link_net ? : net, dev, tb, data, extack);
3192 /* Drivers should call free_netdev() in ->destructor
3193 * and unregister it on failure after registration
3194 * so that device could be finally freed in rtnl_unlock.
3197 /* If device is not registered at all, free it now */
3198 if (dev->reg_state == NETREG_UNINITIALIZED)
3203 err = register_netdevice(dev);
3209 err = rtnl_configure_link(dev, ifm);
3211 goto out_unregister;
3213 err = dev_change_net_namespace(dev, dest_net, ifname);
3215 goto out_unregister;
3217 if (tb[IFLA_MASTER]) {
3218 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
3220 goto out_unregister;
3229 LIST_HEAD(list_kill);
3231 ops->dellink(dev, &list_kill);
3232 unregister_netdevice_many(&list_kill);
3234 unregister_netdevice(dev);
3239 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3240 struct netlink_ext_ack *extack)
3242 struct nlattr **attr;
3245 attr = kmalloc_array(RTNL_MAX_TYPE + 1, sizeof(*attr), GFP_KERNEL);
3249 ret = __rtnl_newlink(skb, nlh, attr, extack);
3254 static int rtnl_valid_getlink_req(struct sk_buff *skb,
3255 const struct nlmsghdr *nlh,
3257 struct netlink_ext_ack *extack)
3259 struct ifinfomsg *ifm;
3262 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
3263 NL_SET_ERR_MSG(extack, "Invalid header for get link");
3267 if (!netlink_strict_get_check(skb))
3268 return nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3269 ifla_policy, extack);
3271 ifm = nlmsg_data(nlh);
3272 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
3274 NL_SET_ERR_MSG(extack, "Invalid values in header for get link request");
3278 err = nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, IFLA_MAX,
3279 ifla_policy, extack);
3283 for (i = 0; i <= IFLA_MAX; i++) {
3290 case IFLA_TARGET_NETNSID:
3293 NL_SET_ERR_MSG(extack, "Unsupported attribute in get link request");
3301 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3302 struct netlink_ext_ack *extack)
3304 struct net *net = sock_net(skb->sk);
3305 struct net *tgt_net = net;
3306 struct ifinfomsg *ifm;
3307 char ifname[IFNAMSIZ];
3308 struct nlattr *tb[IFLA_MAX+1];
3309 struct net_device *dev = NULL;
3310 struct sk_buff *nskb;
3313 u32 ext_filter_mask = 0;
3315 err = rtnl_valid_getlink_req(skb, nlh, tb, extack);
3319 err = rtnl_ensure_unique_netns(tb, extack, true);
3323 if (tb[IFLA_TARGET_NETNSID]) {
3324 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
3325 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
3326 if (IS_ERR(tgt_net))
3327 return PTR_ERR(tgt_net);
3330 if (tb[IFLA_IFNAME])
3331 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3333 if (tb[IFLA_EXT_MASK])
3334 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3337 ifm = nlmsg_data(nlh);
3338 if (ifm->ifi_index > 0)
3339 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
3340 else if (tb[IFLA_IFNAME])
3341 dev = __dev_get_by_name(tgt_net, ifname);
3350 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
3354 err = rtnl_fill_ifinfo(nskb, dev, net,
3355 RTM_NEWLINK, NETLINK_CB(skb).portid,
3356 nlh->nlmsg_seq, 0, 0, ext_filter_mask,
3357 0, NULL, 0, netnsid);
3359 /* -EMSGSIZE implies BUG in if_nlmsg_size */
3360 WARN_ON(err == -EMSGSIZE);
3363 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
3371 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
3373 struct net *net = sock_net(skb->sk);
3374 struct net_device *dev;
3375 struct nlattr *tb[IFLA_MAX+1];
3376 u32 ext_filter_mask = 0;
3377 u16 min_ifinfo_dump_size = 0;
3380 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
3381 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
3382 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
3384 if (nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
3385 if (tb[IFLA_EXT_MASK])
3386 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3389 if (!ext_filter_mask)
3390 return NLMSG_GOODSIZE;
3392 * traverse the list of net devices and compute the minimum
3393 * buffer size based upon the filter mask.
3396 for_each_netdev_rcu(net, dev) {
3397 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
3403 return nlmsg_total_size(min_ifinfo_dump_size);
3406 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
3409 int s_idx = cb->family;
3410 int type = cb->nlh->nlmsg_type - RTM_BASE;
3416 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
3417 struct rtnl_link **tab;
3418 struct rtnl_link *link;
3419 rtnl_dumpit_func dumpit;
3421 if (idx < s_idx || idx == PF_PACKET)
3424 if (type < 0 || type >= RTM_NR_MSGTYPES)
3427 tab = rcu_dereference_rtnl(rtnl_msg_handlers[idx]);
3435 dumpit = link->dumpit;
3440 memset(&cb->args[0], 0, sizeof(cb->args));
3444 ret = dumpit(skb, cb);
3450 return skb->len ? : ret;
3453 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
3454 unsigned int change,
3455 u32 event, gfp_t flags, int *new_nsid,
3458 struct net *net = dev_net(dev);
3459 struct sk_buff *skb;
3461 size_t if_info_size;
3463 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
3467 err = rtnl_fill_ifinfo(skb, dev, dev_net(dev),
3468 type, 0, 0, change, 0, 0, event,
3469 new_nsid, new_ifindex, -1);
3471 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
3472 WARN_ON(err == -EMSGSIZE);
3479 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
3483 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
3485 struct net *net = dev_net(dev);
3487 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
3490 static void rtmsg_ifinfo_event(int type, struct net_device *dev,
3491 unsigned int change, u32 event,
3492 gfp_t flags, int *new_nsid, int new_ifindex)
3494 struct sk_buff *skb;
3496 if (dev->reg_state != NETREG_REGISTERED)
3499 skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags, new_nsid,
3502 rtmsg_ifinfo_send(skb, dev, flags);
3505 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
3508 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
3512 void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change,
3513 gfp_t flags, int *new_nsid, int new_ifindex)
3515 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
3516 new_nsid, new_ifindex);
3519 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
3520 struct net_device *dev,
3521 u8 *addr, u16 vid, u32 pid, u32 seq,
3522 int type, unsigned int flags,
3523 int nlflags, u16 ndm_state)
3525 struct nlmsghdr *nlh;
3528 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
3532 ndm = nlmsg_data(nlh);
3533 ndm->ndm_family = AF_BRIDGE;
3536 ndm->ndm_flags = flags;
3538 ndm->ndm_ifindex = dev->ifindex;
3539 ndm->ndm_state = ndm_state;
3541 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
3542 goto nla_put_failure;
3544 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
3545 goto nla_put_failure;
3547 nlmsg_end(skb, nlh);
3551 nlmsg_cancel(skb, nlh);
3555 static inline size_t rtnl_fdb_nlmsg_size(void)
3557 return NLMSG_ALIGN(sizeof(struct ndmsg)) +
3558 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */
3559 nla_total_size(sizeof(u16)) + /* NDA_VLAN */
3563 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
3566 struct net *net = dev_net(dev);
3567 struct sk_buff *skb;
3570 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
3574 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
3575 0, 0, type, NTF_SELF, 0, ndm_state);
3581 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
3584 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
3588 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
3590 int ndo_dflt_fdb_add(struct ndmsg *ndm,
3591 struct nlattr *tb[],
3592 struct net_device *dev,
3593 const unsigned char *addr, u16 vid,
3598 /* If aging addresses are supported device will need to
3599 * implement its own handler for this.
3601 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
3602 pr_info("%s: FDB only supports static addresses\n", dev->name);
3607 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
3611 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3612 err = dev_uc_add_excl(dev, addr);
3613 else if (is_multicast_ether_addr(addr))
3614 err = dev_mc_add_excl(dev, addr);
3616 /* Only return duplicate errors if NLM_F_EXCL is set */
3617 if (err == -EEXIST && !(flags & NLM_F_EXCL))
3622 EXPORT_SYMBOL(ndo_dflt_fdb_add);
3624 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid,
3625 struct netlink_ext_ack *extack)
3630 if (nla_len(vlan_attr) != sizeof(u16)) {
3631 NL_SET_ERR_MSG(extack, "invalid vlan attribute size");
3635 vid = nla_get_u16(vlan_attr);
3637 if (!vid || vid >= VLAN_VID_MASK) {
3638 NL_SET_ERR_MSG(extack, "invalid vlan id");
3646 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
3647 struct netlink_ext_ack *extack)
3649 struct net *net = sock_net(skb->sk);
3651 struct nlattr *tb[NDA_MAX+1];
3652 struct net_device *dev;
3657 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL,
3662 ndm = nlmsg_data(nlh);
3663 if (ndm->ndm_ifindex == 0) {
3664 NL_SET_ERR_MSG(extack, "invalid ifindex");
3668 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3670 NL_SET_ERR_MSG(extack, "unknown ifindex");
3674 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3675 NL_SET_ERR_MSG(extack, "invalid address");
3679 if (dev->type != ARPHRD_ETHER) {
3680 NL_SET_ERR_MSG(extack, "FDB add only supported for Ethernet devices");
3684 addr = nla_data(tb[NDA_LLADDR]);
3686 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
3692 /* Support fdb on master device the net/bridge default case */
3693 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3694 (dev->priv_flags & IFF_BRIDGE_PORT)) {
3695 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3696 const struct net_device_ops *ops = br_dev->netdev_ops;
3698 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
3699 nlh->nlmsg_flags, extack);
3703 ndm->ndm_flags &= ~NTF_MASTER;
3706 /* Embedded bridge, macvlan, and any other device support */
3707 if ((ndm->ndm_flags & NTF_SELF)) {
3708 if (dev->netdev_ops->ndo_fdb_add)
3709 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
3714 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
3718 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
3720 ndm->ndm_flags &= ~NTF_SELF;
3728 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
3730 int ndo_dflt_fdb_del(struct ndmsg *ndm,
3731 struct nlattr *tb[],
3732 struct net_device *dev,
3733 const unsigned char *addr, u16 vid)
3737 /* If aging addresses are supported device will need to
3738 * implement its own handler for this.
3740 if (!(ndm->ndm_state & NUD_PERMANENT)) {
3741 pr_info("%s: FDB only supports static addresses\n", dev->name);
3745 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3746 err = dev_uc_del(dev, addr);
3747 else if (is_multicast_ether_addr(addr))
3748 err = dev_mc_del(dev, addr);
3752 EXPORT_SYMBOL(ndo_dflt_fdb_del);
3754 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
3755 struct netlink_ext_ack *extack)
3757 struct net *net = sock_net(skb->sk);
3759 struct nlattr *tb[NDA_MAX+1];
3760 struct net_device *dev;
3765 if (!netlink_capable(skb, CAP_NET_ADMIN))
3768 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL,
3773 ndm = nlmsg_data(nlh);
3774 if (ndm->ndm_ifindex == 0) {
3775 NL_SET_ERR_MSG(extack, "invalid ifindex");
3779 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3781 NL_SET_ERR_MSG(extack, "unknown ifindex");
3785 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3786 NL_SET_ERR_MSG(extack, "invalid address");
3790 if (dev->type != ARPHRD_ETHER) {
3791 NL_SET_ERR_MSG(extack, "FDB delete only supported for Ethernet devices");
3795 addr = nla_data(tb[NDA_LLADDR]);
3797 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
3803 /* Support fdb on master device the net/bridge default case */
3804 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3805 (dev->priv_flags & IFF_BRIDGE_PORT)) {
3806 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3807 const struct net_device_ops *ops = br_dev->netdev_ops;
3809 if (ops->ndo_fdb_del)
3810 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
3815 ndm->ndm_flags &= ~NTF_MASTER;
3818 /* Embedded bridge, macvlan, and any other device support */
3819 if (ndm->ndm_flags & NTF_SELF) {
3820 if (dev->netdev_ops->ndo_fdb_del)
3821 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
3824 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
3827 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
3829 ndm->ndm_flags &= ~NTF_SELF;
3836 static int nlmsg_populate_fdb(struct sk_buff *skb,
3837 struct netlink_callback *cb,
3838 struct net_device *dev,
3840 struct netdev_hw_addr_list *list)
3842 struct netdev_hw_addr *ha;
3846 portid = NETLINK_CB(cb->skb).portid;
3847 seq = cb->nlh->nlmsg_seq;
3849 list_for_each_entry(ha, &list->list, list) {
3850 if (*idx < cb->args[2])
3853 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
3855 RTM_NEWNEIGH, NTF_SELF,
3856 NLM_F_MULTI, NUD_PERMANENT);
3866 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
3867 * @skb: socket buffer to store message in
3868 * @cb: netlink callback
3870 * @filter_dev: ignored
3871 * @idx: the number of FDB table entries dumped is added to *@idx
3873 * Default netdevice operation to dump the existing unicast address list.
3874 * Returns number of addresses from list put in skb.
3876 int ndo_dflt_fdb_dump(struct sk_buff *skb,
3877 struct netlink_callback *cb,
3878 struct net_device *dev,
3879 struct net_device *filter_dev,
3884 if (dev->type != ARPHRD_ETHER)
3887 netif_addr_lock_bh(dev);
3888 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
3891 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
3893 netif_addr_unlock_bh(dev);
3896 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3898 static int valid_fdb_dump_strict(const struct nlmsghdr *nlh,
3899 int *br_idx, int *brport_idx,
3900 struct netlink_ext_ack *extack)
3902 struct nlattr *tb[NDA_MAX + 1];
3906 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
3907 NL_SET_ERR_MSG(extack, "Invalid header for fdb dump request");
3911 ndm = nlmsg_data(nlh);
3912 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state ||
3913 ndm->ndm_flags || ndm->ndm_type) {
3914 NL_SET_ERR_MSG(extack, "Invalid values in header for fbd dump request");
3918 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
3919 NDA_MAX, NULL, extack);
3923 *brport_idx = ndm->ndm_ifindex;
3924 for (i = 0; i <= NDA_MAX; ++i) {
3930 if (nla_len(tb[i]) != sizeof(u32)) {
3931 NL_SET_ERR_MSG(extack, "Invalid IFINDEX attribute in fdb dump request");
3934 *brport_idx = nla_get_u32(tb[NDA_IFINDEX]);
3937 if (nla_len(tb[i]) != sizeof(u32)) {
3938 NL_SET_ERR_MSG(extack, "Invalid MASTER attribute in fdb dump request");
3941 *br_idx = nla_get_u32(tb[NDA_MASTER]);
3944 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb dump request");
3952 static int valid_fdb_dump_legacy(const struct nlmsghdr *nlh,
3953 int *br_idx, int *brport_idx,
3954 struct netlink_ext_ack *extack)
3956 struct nlattr *tb[IFLA_MAX+1];
3959 /* A hack to preserve kernel<->userspace interface.
3960 * Before Linux v4.12 this code accepted ndmsg since iproute2 v3.3.0.
3961 * However, ndmsg is shorter than ifinfomsg thus nlmsg_parse() bails.
3962 * So, check for ndmsg with an optional u32 attribute (not used here).
3963 * Fortunately these sizes don't conflict with the size of ifinfomsg
3964 * with an optional attribute.
3966 if (nlmsg_len(nlh) != sizeof(struct ndmsg) &&
3967 (nlmsg_len(nlh) != sizeof(struct ndmsg) +
3968 nla_attr_size(sizeof(u32)))) {
3969 struct ifinfomsg *ifm;
3971 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
3972 tb, IFLA_MAX, ifla_policy,
3976 } else if (err == 0) {
3977 if (tb[IFLA_MASTER])
3978 *br_idx = nla_get_u32(tb[IFLA_MASTER]);
3981 ifm = nlmsg_data(nlh);
3982 *brport_idx = ifm->ifi_index;
3987 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3989 struct net_device *dev;
3990 struct net_device *br_dev = NULL;
3991 const struct net_device_ops *ops = NULL;
3992 const struct net_device_ops *cops = NULL;
3993 struct net *net = sock_net(skb->sk);
3994 struct hlist_head *head;
4002 if (cb->strict_check)
4003 err = valid_fdb_dump_strict(cb->nlh, &br_idx, &brport_idx,
4006 err = valid_fdb_dump_legacy(cb->nlh, &br_idx, &brport_idx,
4012 br_dev = __dev_get_by_index(net, br_idx);
4016 ops = br_dev->netdev_ops;
4020 s_idx = cb->args[1];
4022 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4024 head = &net->dev_index_head[h];
4025 hlist_for_each_entry(dev, head, index_hlist) {
4027 if (brport_idx && (dev->ifindex != brport_idx))
4030 if (!br_idx) { /* user did not specify a specific bridge */
4031 if (dev->priv_flags & IFF_BRIDGE_PORT) {
4032 br_dev = netdev_master_upper_dev_get(dev);
4033 cops = br_dev->netdev_ops;
4036 if (dev != br_dev &&
4037 !(dev->priv_flags & IFF_BRIDGE_PORT))
4040 if (br_dev != netdev_master_upper_dev_get(dev) &&
4041 !(dev->priv_flags & IFF_EBRIDGE))
4049 if (dev->priv_flags & IFF_BRIDGE_PORT) {
4050 if (cops && cops->ndo_fdb_dump) {
4051 err = cops->ndo_fdb_dump(skb, cb,
4054 if (err == -EMSGSIZE)
4059 if (dev->netdev_ops->ndo_fdb_dump)
4060 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
4064 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
4066 if (err == -EMSGSIZE)
4071 /* reset fdb offset to 0 for rest of the interfaces */
4087 static int valid_fdb_get_strict(const struct nlmsghdr *nlh,
4088 struct nlattr **tb, u8 *ndm_flags,
4089 int *br_idx, int *brport_idx, u8 **addr,
4090 u16 *vid, struct netlink_ext_ack *extack)
4095 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
4096 NL_SET_ERR_MSG(extack, "Invalid header for fdb get request");
4100 ndm = nlmsg_data(nlh);
4101 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state ||
4103 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb get request");
4107 if (ndm->ndm_flags & ~(NTF_MASTER | NTF_SELF)) {
4108 NL_SET_ERR_MSG(extack, "Invalid flags in header for fdb get request");
4112 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
4113 NDA_MAX, nda_policy, extack);
4117 *ndm_flags = ndm->ndm_flags;
4118 *brport_idx = ndm->ndm_ifindex;
4119 for (i = 0; i <= NDA_MAX; ++i) {
4125 *br_idx = nla_get_u32(tb[i]);
4128 if (nla_len(tb[i]) != ETH_ALEN) {
4129 NL_SET_ERR_MSG(extack, "Invalid address in fdb get request");
4132 *addr = nla_data(tb[i]);
4135 err = fdb_vid_parse(tb[i], vid, extack);
4142 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb get request");
4150 static int rtnl_fdb_get(struct sk_buff *in_skb, struct nlmsghdr *nlh,
4151 struct netlink_ext_ack *extack)
4153 struct net_device *dev = NULL, *br_dev = NULL;
4154 const struct net_device_ops *ops = NULL;
4155 struct net *net = sock_net(in_skb->sk);
4156 struct nlattr *tb[NDA_MAX + 1];
4157 struct sk_buff *skb;
4165 err = valid_fdb_get_strict(nlh, tb, &ndm_flags, &br_idx,
4166 &brport_idx, &addr, &vid, extack);
4171 NL_SET_ERR_MSG(extack, "Missing lookup address for fdb get request");
4176 dev = __dev_get_by_index(net, brport_idx);
4178 NL_SET_ERR_MSG(extack, "Unknown device ifindex");
4185 NL_SET_ERR_MSG(extack, "Master and device are mutually exclusive");
4189 br_dev = __dev_get_by_index(net, br_idx);
4191 NL_SET_ERR_MSG(extack, "Invalid master ifindex");
4194 ops = br_dev->netdev_ops;
4198 if (!ndm_flags || (ndm_flags & NTF_MASTER)) {
4199 if (!(dev->priv_flags & IFF_BRIDGE_PORT)) {
4200 NL_SET_ERR_MSG(extack, "Device is not a bridge port");
4203 br_dev = netdev_master_upper_dev_get(dev);
4205 NL_SET_ERR_MSG(extack, "Master of device not found");
4208 ops = br_dev->netdev_ops;
4210 if (!(ndm_flags & NTF_SELF)) {
4211 NL_SET_ERR_MSG(extack, "Missing NTF_SELF");
4214 ops = dev->netdev_ops;
4218 if (!br_dev && !dev) {
4219 NL_SET_ERR_MSG(extack, "No device specified");
4223 if (!ops || !ops->ndo_fdb_get) {
4224 NL_SET_ERR_MSG(extack, "Fdb get operation not supported by device");
4228 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
4234 err = ops->ndo_fdb_get(skb, tb, dev, addr, vid,
4235 NETLINK_CB(in_skb).portid,
4236 nlh->nlmsg_seq, extack);
4240 return rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
4246 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
4247 unsigned int attrnum, unsigned int flag)
4250 return nla_put_u8(skb, attrnum, !!(flags & flag));
4254 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
4255 struct net_device *dev, u16 mode,
4256 u32 flags, u32 mask, int nlflags,
4258 int (*vlan_fill)(struct sk_buff *skb,
4259 struct net_device *dev,
4262 struct nlmsghdr *nlh;
4263 struct ifinfomsg *ifm;
4264 struct nlattr *br_afspec;
4265 struct nlattr *protinfo;
4266 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
4267 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4270 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
4274 ifm = nlmsg_data(nlh);
4275 ifm->ifi_family = AF_BRIDGE;
4277 ifm->ifi_type = dev->type;
4278 ifm->ifi_index = dev->ifindex;
4279 ifm->ifi_flags = dev_get_flags(dev);
4280 ifm->ifi_change = 0;
4283 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
4284 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
4285 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
4287 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
4289 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
4290 (dev->ifindex != dev_get_iflink(dev) &&
4291 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
4292 goto nla_put_failure;
4294 br_afspec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
4296 goto nla_put_failure;
4298 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
4299 nla_nest_cancel(skb, br_afspec);
4300 goto nla_put_failure;
4303 if (mode != BRIDGE_MODE_UNDEF) {
4304 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
4305 nla_nest_cancel(skb, br_afspec);
4306 goto nla_put_failure;
4310 err = vlan_fill(skb, dev, filter_mask);
4312 nla_nest_cancel(skb, br_afspec);
4313 goto nla_put_failure;
4316 nla_nest_end(skb, br_afspec);
4318 protinfo = nla_nest_start(skb, IFLA_PROTINFO);
4320 goto nla_put_failure;
4322 if (brport_nla_put_flag(skb, flags, mask,
4323 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
4324 brport_nla_put_flag(skb, flags, mask,
4325 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
4326 brport_nla_put_flag(skb, flags, mask,
4327 IFLA_BRPORT_FAST_LEAVE,
4328 BR_MULTICAST_FAST_LEAVE) ||
4329 brport_nla_put_flag(skb, flags, mask,
4330 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
4331 brport_nla_put_flag(skb, flags, mask,
4332 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
4333 brport_nla_put_flag(skb, flags, mask,
4334 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
4335 brport_nla_put_flag(skb, flags, mask,
4336 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
4337 brport_nla_put_flag(skb, flags, mask,
4338 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
4339 nla_nest_cancel(skb, protinfo);
4340 goto nla_put_failure;
4343 nla_nest_end(skb, protinfo);
4345 nlmsg_end(skb, nlh);
4348 nlmsg_cancel(skb, nlh);
4349 return err ? err : -EMSGSIZE;
4351 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
4353 static int valid_bridge_getlink_req(const struct nlmsghdr *nlh,
4354 bool strict_check, u32 *filter_mask,
4355 struct netlink_ext_ack *extack)
4357 struct nlattr *tb[IFLA_MAX+1];
4361 struct ifinfomsg *ifm;
4363 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
4364 NL_SET_ERR_MSG(extack, "Invalid header for bridge link dump");
4368 ifm = nlmsg_data(nlh);
4369 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
4370 ifm->ifi_change || ifm->ifi_index) {
4371 NL_SET_ERR_MSG(extack, "Invalid values in header for bridge link dump request");
4375 err = nlmsg_parse_deprecated_strict(nlh,
4376 sizeof(struct ifinfomsg),
4377 tb, IFLA_MAX, ifla_policy,
4380 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
4381 tb, IFLA_MAX, ifla_policy,
4387 /* new attributes should only be added with strict checking */
4388 for (i = 0; i <= IFLA_MAX; ++i) {
4394 *filter_mask = nla_get_u32(tb[i]);
4398 NL_SET_ERR_MSG(extack, "Unsupported attribute in bridge link dump request");
4407 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
4409 const struct nlmsghdr *nlh = cb->nlh;
4410 struct net *net = sock_net(skb->sk);
4411 struct net_device *dev;
4413 u32 portid = NETLINK_CB(cb->skb).portid;
4414 u32 seq = nlh->nlmsg_seq;
4415 u32 filter_mask = 0;
4418 err = valid_bridge_getlink_req(nlh, cb->strict_check, &filter_mask,
4420 if (err < 0 && cb->strict_check)
4424 for_each_netdev_rcu(net, dev) {
4425 const struct net_device_ops *ops = dev->netdev_ops;
4426 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4428 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
4429 if (idx >= cb->args[0]) {
4430 err = br_dev->netdev_ops->ndo_bridge_getlink(
4431 skb, portid, seq, dev,
4432 filter_mask, NLM_F_MULTI);
4433 if (err < 0 && err != -EOPNOTSUPP) {
4434 if (likely(skb->len))
4443 if (ops->ndo_bridge_getlink) {
4444 if (idx >= cb->args[0]) {
4445 err = ops->ndo_bridge_getlink(skb, portid,
4449 if (err < 0 && err != -EOPNOTSUPP) {
4450 if (likely(skb->len))
4467 static inline size_t bridge_nlmsg_size(void)
4469 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
4470 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
4471 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
4472 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
4473 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
4474 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
4475 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
4476 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
4477 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
4478 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
4479 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
4482 static int rtnl_bridge_notify(struct net_device *dev)
4484 struct net *net = dev_net(dev);
4485 struct sk_buff *skb;
4486 int err = -EOPNOTSUPP;
4488 if (!dev->netdev_ops->ndo_bridge_getlink)
4491 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
4497 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
4504 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
4507 WARN_ON(err == -EMSGSIZE);
4510 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
4514 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
4515 struct netlink_ext_ack *extack)
4517 struct net *net = sock_net(skb->sk);
4518 struct ifinfomsg *ifm;
4519 struct net_device *dev;
4520 struct nlattr *br_spec, *attr = NULL;
4521 int rem, err = -EOPNOTSUPP;
4523 bool have_flags = false;
4525 if (nlmsg_len(nlh) < sizeof(*ifm))
4528 ifm = nlmsg_data(nlh);
4529 if (ifm->ifi_family != AF_BRIDGE)
4530 return -EPFNOSUPPORT;
4532 dev = __dev_get_by_index(net, ifm->ifi_index);
4534 NL_SET_ERR_MSG(extack, "unknown ifindex");
4538 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
4540 nla_for_each_nested(attr, br_spec, rem) {
4541 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
4542 if (nla_len(attr) < sizeof(flags))
4546 flags = nla_get_u16(attr);
4552 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
4553 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4555 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
4560 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags,
4565 flags &= ~BRIDGE_FLAGS_MASTER;
4568 if ((flags & BRIDGE_FLAGS_SELF)) {
4569 if (!dev->netdev_ops->ndo_bridge_setlink)
4572 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
4576 flags &= ~BRIDGE_FLAGS_SELF;
4578 /* Generate event to notify upper layer of bridge
4581 err = rtnl_bridge_notify(dev);
4586 memcpy(nla_data(attr), &flags, sizeof(flags));
4591 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
4592 struct netlink_ext_ack *extack)
4594 struct net *net = sock_net(skb->sk);
4595 struct ifinfomsg *ifm;
4596 struct net_device *dev;
4597 struct nlattr *br_spec, *attr = NULL;
4598 int rem, err = -EOPNOTSUPP;
4600 bool have_flags = false;
4602 if (nlmsg_len(nlh) < sizeof(*ifm))
4605 ifm = nlmsg_data(nlh);
4606 if (ifm->ifi_family != AF_BRIDGE)
4607 return -EPFNOSUPPORT;
4609 dev = __dev_get_by_index(net, ifm->ifi_index);
4611 NL_SET_ERR_MSG(extack, "unknown ifindex");
4615 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
4617 nla_for_each_nested(attr, br_spec, rem) {
4618 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
4619 if (nla_len(attr) < sizeof(flags))
4623 flags = nla_get_u16(attr);
4629 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
4630 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4632 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
4637 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
4641 flags &= ~BRIDGE_FLAGS_MASTER;
4644 if ((flags & BRIDGE_FLAGS_SELF)) {
4645 if (!dev->netdev_ops->ndo_bridge_dellink)
4648 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
4652 flags &= ~BRIDGE_FLAGS_SELF;
4654 /* Generate event to notify upper layer of bridge
4657 err = rtnl_bridge_notify(dev);
4662 memcpy(nla_data(attr), &flags, sizeof(flags));
4667 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
4669 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
4670 (!idxattr || idxattr == attrid);
4673 #define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1)
4674 static int rtnl_get_offload_stats_attr_size(int attr_id)
4677 case IFLA_OFFLOAD_XSTATS_CPU_HIT:
4678 return sizeof(struct rtnl_link_stats64);
4684 static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev,
4687 struct nlattr *attr = NULL;
4692 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
4693 dev->netdev_ops->ndo_get_offload_stats))
4696 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
4697 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
4698 if (attr_id < *prividx)
4701 size = rtnl_get_offload_stats_attr_size(attr_id);
4705 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
4708 attr = nla_reserve_64bit(skb, attr_id, size,
4709 IFLA_OFFLOAD_XSTATS_UNSPEC);
4711 goto nla_put_failure;
4713 attr_data = nla_data(attr);
4714 memset(attr_data, 0, size);
4715 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev,
4718 goto get_offload_stats_failure;
4729 get_offload_stats_failure:
4734 static int rtnl_get_offload_stats_size(const struct net_device *dev)
4740 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
4741 dev->netdev_ops->ndo_get_offload_stats))
4744 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
4745 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
4746 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
4748 size = rtnl_get_offload_stats_attr_size(attr_id);
4749 nla_size += nla_total_size_64bit(size);
4753 nla_size += nla_total_size(0);
4758 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
4759 int type, u32 pid, u32 seq, u32 change,
4760 unsigned int flags, unsigned int filter_mask,
4761 int *idxattr, int *prividx)
4763 struct if_stats_msg *ifsm;
4764 struct nlmsghdr *nlh;
4765 struct nlattr *attr;
4766 int s_prividx = *prividx;
4771 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
4775 ifsm = nlmsg_data(nlh);
4776 ifsm->family = PF_UNSPEC;
4779 ifsm->ifindex = dev->ifindex;
4780 ifsm->filter_mask = filter_mask;
4782 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
4783 struct rtnl_link_stats64 *sp;
4785 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
4786 sizeof(struct rtnl_link_stats64),
4789 goto nla_put_failure;
4791 sp = nla_data(attr);
4792 dev_get_stats(dev, sp);
4795 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
4796 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
4798 if (ops && ops->fill_linkxstats) {
4799 *idxattr = IFLA_STATS_LINK_XSTATS;
4800 attr = nla_nest_start_noflag(skb,
4801 IFLA_STATS_LINK_XSTATS);
4803 goto nla_put_failure;
4805 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
4806 nla_nest_end(skb, attr);
4808 goto nla_put_failure;
4813 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
4815 const struct rtnl_link_ops *ops = NULL;
4816 const struct net_device *master;
4818 master = netdev_master_upper_dev_get(dev);
4820 ops = master->rtnl_link_ops;
4821 if (ops && ops->fill_linkxstats) {
4822 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
4823 attr = nla_nest_start_noflag(skb,
4824 IFLA_STATS_LINK_XSTATS_SLAVE);
4826 goto nla_put_failure;
4828 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
4829 nla_nest_end(skb, attr);
4831 goto nla_put_failure;
4836 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
4838 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
4839 attr = nla_nest_start_noflag(skb,
4840 IFLA_STATS_LINK_OFFLOAD_XSTATS);
4842 goto nla_put_failure;
4844 err = rtnl_get_offload_stats(skb, dev, prividx);
4845 if (err == -ENODATA)
4846 nla_nest_cancel(skb, attr);
4848 nla_nest_end(skb, attr);
4850 if (err && err != -ENODATA)
4851 goto nla_put_failure;
4855 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
4856 struct rtnl_af_ops *af_ops;
4858 *idxattr = IFLA_STATS_AF_SPEC;
4859 attr = nla_nest_start_noflag(skb, IFLA_STATS_AF_SPEC);
4861 goto nla_put_failure;
4864 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
4865 if (af_ops->fill_stats_af) {
4869 af = nla_nest_start_noflag(skb,
4873 goto nla_put_failure;
4875 err = af_ops->fill_stats_af(skb, dev);
4877 if (err == -ENODATA) {
4878 nla_nest_cancel(skb, af);
4879 } else if (err < 0) {
4881 goto nla_put_failure;
4884 nla_nest_end(skb, af);
4889 nla_nest_end(skb, attr);
4894 nlmsg_end(skb, nlh);
4899 /* not a multi message or no progress mean a real error */
4900 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
4901 nlmsg_cancel(skb, nlh);
4903 nlmsg_end(skb, nlh);
4908 static size_t if_nlmsg_stats_size(const struct net_device *dev,
4913 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
4914 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
4916 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
4917 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
4918 int attr = IFLA_STATS_LINK_XSTATS;
4920 if (ops && ops->get_linkxstats_size) {
4921 size += nla_total_size(ops->get_linkxstats_size(dev,
4923 /* for IFLA_STATS_LINK_XSTATS */
4924 size += nla_total_size(0);
4928 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
4929 struct net_device *_dev = (struct net_device *)dev;
4930 const struct rtnl_link_ops *ops = NULL;
4931 const struct net_device *master;
4933 /* netdev_master_upper_dev_get can't take const */
4934 master = netdev_master_upper_dev_get(_dev);
4936 ops = master->rtnl_link_ops;
4937 if (ops && ops->get_linkxstats_size) {
4938 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
4940 size += nla_total_size(ops->get_linkxstats_size(dev,
4942 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
4943 size += nla_total_size(0);
4947 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
4948 size += rtnl_get_offload_stats_size(dev);
4950 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
4951 struct rtnl_af_ops *af_ops;
4953 /* for IFLA_STATS_AF_SPEC */
4954 size += nla_total_size(0);
4957 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
4958 if (af_ops->get_stats_af_size) {
4959 size += nla_total_size(
4960 af_ops->get_stats_af_size(dev));
4963 size += nla_total_size(0);
4972 static int rtnl_valid_stats_req(const struct nlmsghdr *nlh, bool strict_check,
4973 bool is_dump, struct netlink_ext_ack *extack)
4975 struct if_stats_msg *ifsm;
4977 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifsm))) {
4978 NL_SET_ERR_MSG(extack, "Invalid header for stats dump");
4985 ifsm = nlmsg_data(nlh);
4987 /* only requests using strict checks can pass data to influence
4988 * the dump. The legacy exception is filter_mask.
4990 if (ifsm->pad1 || ifsm->pad2 || (is_dump && ifsm->ifindex)) {
4991 NL_SET_ERR_MSG(extack, "Invalid values in header for stats dump request");
4994 if (nlmsg_attrlen(nlh, sizeof(*ifsm))) {
4995 NL_SET_ERR_MSG(extack, "Invalid attributes after stats header");
4998 if (ifsm->filter_mask >= IFLA_STATS_FILTER_BIT(IFLA_STATS_MAX + 1)) {
4999 NL_SET_ERR_MSG(extack, "Invalid stats requested through filter mask");
5006 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
5007 struct netlink_ext_ack *extack)
5009 struct net *net = sock_net(skb->sk);
5010 struct net_device *dev = NULL;
5011 int idxattr = 0, prividx = 0;
5012 struct if_stats_msg *ifsm;
5013 struct sk_buff *nskb;
5017 err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb),
5022 ifsm = nlmsg_data(nlh);
5023 if (ifsm->ifindex > 0)
5024 dev = __dev_get_by_index(net, ifsm->ifindex);
5031 filter_mask = ifsm->filter_mask;
5035 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
5039 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
5040 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
5041 0, filter_mask, &idxattr, &prividx);
5043 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
5044 WARN_ON(err == -EMSGSIZE);
5047 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
5053 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
5055 struct netlink_ext_ack *extack = cb->extack;
5056 int h, s_h, err, s_idx, s_idxattr, s_prividx;
5057 struct net *net = sock_net(skb->sk);
5058 unsigned int flags = NLM_F_MULTI;
5059 struct if_stats_msg *ifsm;
5060 struct hlist_head *head;
5061 struct net_device *dev;
5062 u32 filter_mask = 0;
5066 s_idx = cb->args[1];
5067 s_idxattr = cb->args[2];
5068 s_prividx = cb->args[3];
5070 cb->seq = net->dev_base_seq;
5072 err = rtnl_valid_stats_req(cb->nlh, cb->strict_check, true, extack);
5076 ifsm = nlmsg_data(cb->nlh);
5077 filter_mask = ifsm->filter_mask;
5079 NL_SET_ERR_MSG(extack, "Filter mask must be set for stats dump");
5083 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
5085 head = &net->dev_index_head[h];
5086 hlist_for_each_entry(dev, head, index_hlist) {
5089 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
5090 NETLINK_CB(cb->skb).portid,
5091 cb->nlh->nlmsg_seq, 0,
5093 &s_idxattr, &s_prividx);
5094 /* If we ran out of room on the first message,
5097 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
5103 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
5109 cb->args[3] = s_prividx;
5110 cb->args[2] = s_idxattr;
5117 /* Process one rtnetlink message. */
5119 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
5120 struct netlink_ext_ack *extack)
5122 struct net *net = sock_net(skb->sk);
5123 struct rtnl_link *link;
5124 struct module *owner;
5125 int err = -EOPNOTSUPP;
5126 rtnl_doit_func doit;
5132 type = nlh->nlmsg_type;
5138 /* All the messages must have at least 1 byte length */
5139 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
5142 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
5145 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
5149 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
5151 rtnl_dumpit_func dumpit;
5152 u16 min_dump_alloc = 0;
5154 link = rtnl_get_link(family, type);
5155 if (!link || !link->dumpit) {
5157 link = rtnl_get_link(family, type);
5158 if (!link || !link->dumpit)
5161 owner = link->owner;
5162 dumpit = link->dumpit;
5164 if (type == RTM_GETLINK - RTM_BASE)
5165 min_dump_alloc = rtnl_calcit(skb, nlh);
5168 /* need to do this before rcu_read_unlock() */
5169 if (!try_module_get(owner))
5170 err = -EPROTONOSUPPORT;
5176 struct netlink_dump_control c = {
5178 .min_dump_alloc = min_dump_alloc,
5181 err = netlink_dump_start(rtnl, skb, nlh, &c);
5182 /* netlink_dump_start() will keep a reference on
5183 * module if dump is still in progress.
5190 link = rtnl_get_link(family, type);
5191 if (!link || !link->doit) {
5193 link = rtnl_get_link(PF_UNSPEC, type);
5194 if (!link || !link->doit)
5198 owner = link->owner;
5199 if (!try_module_get(owner)) {
5200 err = -EPROTONOSUPPORT;
5204 flags = link->flags;
5205 if (flags & RTNL_FLAG_DOIT_UNLOCKED) {
5209 err = doit(skb, nlh, extack);
5216 link = rtnl_get_link(family, type);
5217 if (link && link->doit)
5218 err = link->doit(skb, nlh, extack);
5234 static void rtnetlink_rcv(struct sk_buff *skb)
5236 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
5239 static int rtnetlink_bind(struct net *net, int group)
5242 case RTNLGRP_IPV4_MROUTE_R:
5243 case RTNLGRP_IPV6_MROUTE_R:
5244 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
5251 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
5253 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
5257 case NETDEV_CHANGEMTU:
5258 case NETDEV_CHANGEADDR:
5259 case NETDEV_CHANGENAME:
5260 case NETDEV_FEAT_CHANGE:
5261 case NETDEV_BONDING_FAILOVER:
5262 case NETDEV_POST_TYPE_CHANGE:
5263 case NETDEV_NOTIFY_PEERS:
5264 case NETDEV_CHANGEUPPER:
5265 case NETDEV_RESEND_IGMP:
5266 case NETDEV_CHANGEINFODATA:
5267 case NETDEV_CHANGELOWERSTATE:
5268 case NETDEV_CHANGE_TX_QUEUE_LEN:
5269 rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event),
5270 GFP_KERNEL, NULL, 0);
5278 static struct notifier_block rtnetlink_dev_notifier = {
5279 .notifier_call = rtnetlink_event,
5283 static int __net_init rtnetlink_net_init(struct net *net)
5286 struct netlink_kernel_cfg cfg = {
5287 .groups = RTNLGRP_MAX,
5288 .input = rtnetlink_rcv,
5289 .cb_mutex = &rtnl_mutex,
5290 .flags = NL_CFG_F_NONROOT_RECV,
5291 .bind = rtnetlink_bind,
5294 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
5301 static void __net_exit rtnetlink_net_exit(struct net *net)
5303 netlink_kernel_release(net->rtnl);
5307 static struct pernet_operations rtnetlink_net_ops = {
5308 .init = rtnetlink_net_init,
5309 .exit = rtnetlink_net_exit,
5312 void __init rtnetlink_init(void)
5314 if (register_pernet_subsys(&rtnetlink_net_ops))
5315 panic("rtnetlink_init: cannot initialize rtnetlink\n");
5317 register_netdevice_notifier(&rtnetlink_dev_notifier);
5319 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
5320 rtnl_dump_ifinfo, 0);
5321 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, 0);
5322 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, 0);
5323 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, 0);
5325 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, 0);
5326 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, 0);
5327 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, 0);
5329 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0);
5330 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, 0);
5331 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, rtnl_fdb_get, rtnl_fdb_dump, 0);
5333 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, 0);
5334 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, 0);
5335 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, 0);
5337 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,