1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * INET An implementation of the TCP/IP protocol suite for the LINUX
4 * operating system. INET is implemented using the BSD Socket
5 * interface as the means of communication with the user level.
7 * Routing netlink socket interface: protocol independent part.
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
12 * Vitaly E. Lavrov RTA_OK arithmetic was wrong.
15 #include <linux/bitops.h>
16 #include <linux/errno.h>
17 #include <linux/module.h>
18 #include <linux/types.h>
19 #include <linux/socket.h>
20 #include <linux/kernel.h>
21 #include <linux/timer.h>
22 #include <linux/string.h>
23 #include <linux/sockios.h>
24 #include <linux/net.h>
25 #include <linux/fcntl.h>
27 #include <linux/slab.h>
28 #include <linux/interrupt.h>
29 #include <linux/capability.h>
30 #include <linux/skbuff.h>
31 #include <linux/init.h>
32 #include <linux/security.h>
33 #include <linux/mutex.h>
34 #include <linux/if_addr.h>
35 #include <linux/if_bridge.h>
36 #include <linux/if_vlan.h>
37 #include <linux/pci.h>
38 #include <linux/etherdevice.h>
39 #include <linux/bpf.h>
41 #include <linux/uaccess.h>
43 #include <linux/inet.h>
44 #include <linux/netdevice.h>
46 #include <net/protocol.h>
48 #include <net/route.h>
52 #include <net/pkt_sched.h>
53 #include <net/fib_rules.h>
54 #include <net/rtnetlink.h>
55 #include <net/net_namespace.h>
56 #include <net/devlink.h>
57 #if IS_ENABLED(CONFIG_IPV6)
58 #include <net/addrconf.h>
60 #include <linux/dpll.h>
64 #define RTNL_MAX_TYPE 50
65 #define RTNL_SLAVE_MAX_TYPE 44
69 rtnl_dumpit_func dumpit;
75 static DEFINE_MUTEX(rtnl_mutex);
79 mutex_lock(&rtnl_mutex);
81 EXPORT_SYMBOL(rtnl_lock);
83 int rtnl_lock_killable(void)
85 return mutex_lock_killable(&rtnl_mutex);
87 EXPORT_SYMBOL(rtnl_lock_killable);
89 static struct sk_buff *defer_kfree_skb_list;
90 void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
93 tail->next = defer_kfree_skb_list;
94 defer_kfree_skb_list = head;
97 EXPORT_SYMBOL(rtnl_kfree_skbs);
99 void __rtnl_unlock(void)
101 struct sk_buff *head = defer_kfree_skb_list;
103 defer_kfree_skb_list = NULL;
105 /* Ensure that we didn't actually add any TODO item when __rtnl_unlock()
106 * is used. In some places, e.g. in cfg80211, we have code that will do
113 * and because netdev_run_todo() acquires the RTNL for items on the list
114 * we could cause a situation such as this:
117 * unregister_netdevice()
125 * // list not empty now
126 * // because of thread 2
128 * while (!list_empty(...))
133 * However, usage of __rtnl_unlock() is rare, and so we can ensure that
134 * it's not used in cases where something is added to do the list.
136 WARN_ON(!list_empty(&net_todo_list));
138 mutex_unlock(&rtnl_mutex);
141 struct sk_buff *next = head->next;
149 void rtnl_unlock(void)
151 /* This fellow will unlock it for us. */
154 EXPORT_SYMBOL(rtnl_unlock);
156 int rtnl_trylock(void)
158 return mutex_trylock(&rtnl_mutex);
160 EXPORT_SYMBOL(rtnl_trylock);
162 int rtnl_is_locked(void)
164 return mutex_is_locked(&rtnl_mutex);
166 EXPORT_SYMBOL(rtnl_is_locked);
168 bool refcount_dec_and_rtnl_lock(refcount_t *r)
170 return refcount_dec_and_mutex_lock(r, &rtnl_mutex);
172 EXPORT_SYMBOL(refcount_dec_and_rtnl_lock);
174 #ifdef CONFIG_PROVE_LOCKING
175 bool lockdep_rtnl_is_held(void)
177 return lockdep_is_held(&rtnl_mutex);
179 EXPORT_SYMBOL(lockdep_rtnl_is_held);
180 #endif /* #ifdef CONFIG_PROVE_LOCKING */
182 static struct rtnl_link __rcu *__rcu *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
184 static inline int rtm_msgindex(int msgtype)
186 int msgindex = msgtype - RTM_BASE;
189 * msgindex < 0 implies someone tried to register a netlink
190 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
191 * the message type has not been added to linux/rtnetlink.h
193 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
198 static struct rtnl_link *rtnl_get_link(int protocol, int msgtype)
200 struct rtnl_link __rcu **tab;
202 if (protocol >= ARRAY_SIZE(rtnl_msg_handlers))
203 protocol = PF_UNSPEC;
205 tab = rcu_dereference_rtnl(rtnl_msg_handlers[protocol]);
207 tab = rcu_dereference_rtnl(rtnl_msg_handlers[PF_UNSPEC]);
209 return rcu_dereference_rtnl(tab[msgtype]);
212 static int rtnl_register_internal(struct module *owner,
213 int protocol, int msgtype,
214 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
217 struct rtnl_link *link, *old;
218 struct rtnl_link __rcu **tab;
222 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
223 msgindex = rtm_msgindex(msgtype);
226 tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
228 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(void *), GFP_KERNEL);
232 /* ensures we see the 0 stores */
233 rcu_assign_pointer(rtnl_msg_handlers[protocol], tab);
236 old = rtnl_dereference(tab[msgindex]);
238 link = kmemdup(old, sizeof(*old), GFP_KERNEL);
242 link = kzalloc(sizeof(*link), GFP_KERNEL);
247 WARN_ON(link->owner && link->owner != owner);
250 WARN_ON(doit && link->doit && link->doit != doit);
253 WARN_ON(dumpit && link->dumpit && link->dumpit != dumpit);
255 link->dumpit = dumpit;
257 WARN_ON(rtnl_msgtype_kind(msgtype) != RTNL_KIND_DEL &&
258 (flags & RTNL_FLAG_BULK_DEL_SUPPORTED));
259 link->flags |= flags;
261 /* publish protocol:msgtype */
262 rcu_assign_pointer(tab[msgindex], link);
272 * rtnl_register_module - Register a rtnetlink message type
274 * @owner: module registering the hook (THIS_MODULE)
275 * @protocol: Protocol family or PF_UNSPEC
276 * @msgtype: rtnetlink message type
277 * @doit: Function pointer called for each request message
278 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
279 * @flags: rtnl_link_flags to modify behaviour of doit/dumpit functions
281 * Like rtnl_register, but for use by removable modules.
283 int rtnl_register_module(struct module *owner,
284 int protocol, int msgtype,
285 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
288 return rtnl_register_internal(owner, protocol, msgtype,
289 doit, dumpit, flags);
291 EXPORT_SYMBOL_GPL(rtnl_register_module);
294 * rtnl_register - Register a rtnetlink message type
295 * @protocol: Protocol family or PF_UNSPEC
296 * @msgtype: rtnetlink message type
297 * @doit: Function pointer called for each request message
298 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
299 * @flags: rtnl_link_flags to modify behaviour of doit/dumpit functions
301 * Registers the specified function pointers (at least one of them has
302 * to be non-NULL) to be called whenever a request message for the
303 * specified protocol family and message type is received.
305 * The special protocol family PF_UNSPEC may be used to define fallback
306 * function pointers for the case when no entry for the specific protocol
309 void rtnl_register(int protocol, int msgtype,
310 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
315 err = rtnl_register_internal(NULL, protocol, msgtype, doit, dumpit,
318 pr_err("Unable to register rtnetlink message handler, "
319 "protocol = %d, message type = %d\n", protocol, msgtype);
323 * rtnl_unregister - Unregister a rtnetlink message type
324 * @protocol: Protocol family or PF_UNSPEC
325 * @msgtype: rtnetlink message type
327 * Returns 0 on success or a negative error code.
329 int rtnl_unregister(int protocol, int msgtype)
331 struct rtnl_link __rcu **tab;
332 struct rtnl_link *link;
335 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
336 msgindex = rtm_msgindex(msgtype);
339 tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
345 link = rcu_replace_pointer_rtnl(tab[msgindex], NULL);
348 kfree_rcu(link, rcu);
352 EXPORT_SYMBOL_GPL(rtnl_unregister);
355 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
356 * @protocol : Protocol family or PF_UNSPEC
358 * Identical to calling rtnl_unregster() for all registered message types
359 * of a certain protocol family.
361 void rtnl_unregister_all(int protocol)
363 struct rtnl_link __rcu **tab;
364 struct rtnl_link *link;
367 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
370 tab = rcu_replace_pointer_rtnl(rtnl_msg_handlers[protocol], NULL);
375 for (msgindex = 0; msgindex < RTM_NR_MSGTYPES; msgindex++) {
376 link = rcu_replace_pointer_rtnl(tab[msgindex], NULL);
377 kfree_rcu(link, rcu);
385 EXPORT_SYMBOL_GPL(rtnl_unregister_all);
387 static LIST_HEAD(link_ops);
389 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
391 const struct rtnl_link_ops *ops;
393 list_for_each_entry(ops, &link_ops, list) {
394 if (!strcmp(ops->kind, kind))
401 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
402 * @ops: struct rtnl_link_ops * to register
404 * The caller must hold the rtnl_mutex. This function should be used
405 * by drivers that create devices during module initialization. It
406 * must be called before registering the devices.
408 * Returns 0 on success or a negative error code.
410 int __rtnl_link_register(struct rtnl_link_ops *ops)
412 if (rtnl_link_ops_get(ops->kind))
415 /* The check for alloc/setup is here because if ops
416 * does not have that filled up, it is not possible
417 * to use the ops for creating device. So do not
418 * fill up dellink as well. That disables rtnl_dellink.
420 if ((ops->alloc || ops->setup) && !ops->dellink)
421 ops->dellink = unregister_netdevice_queue;
423 list_add_tail(&ops->list, &link_ops);
426 EXPORT_SYMBOL_GPL(__rtnl_link_register);
429 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
430 * @ops: struct rtnl_link_ops * to register
432 * Returns 0 on success or a negative error code.
434 int rtnl_link_register(struct rtnl_link_ops *ops)
438 /* Sanity-check max sizes to avoid stack buffer overflow. */
439 if (WARN_ON(ops->maxtype > RTNL_MAX_TYPE ||
440 ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE))
444 err = __rtnl_link_register(ops);
448 EXPORT_SYMBOL_GPL(rtnl_link_register);
450 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
452 struct net_device *dev;
453 LIST_HEAD(list_kill);
455 for_each_netdev(net, dev) {
456 if (dev->rtnl_link_ops == ops)
457 ops->dellink(dev, &list_kill);
459 unregister_netdevice_many(&list_kill);
463 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
464 * @ops: struct rtnl_link_ops * to unregister
466 * The caller must hold the rtnl_mutex and guarantee net_namespace_list
467 * integrity (hold pernet_ops_rwsem for writing to close the race
468 * with setup_net() and cleanup_net()).
470 void __rtnl_link_unregister(struct rtnl_link_ops *ops)
475 __rtnl_kill_links(net, ops);
477 list_del(&ops->list);
479 EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
481 /* Return with the rtnl_lock held when there are no network
482 * devices unregistering in any network namespace.
484 static void rtnl_lock_unregistering_all(void)
488 DEFINE_WAIT_FUNC(wait, woken_wake_function);
490 add_wait_queue(&netdev_unregistering_wq, &wait);
492 unregistering = false;
494 /* We held write locked pernet_ops_rwsem, and parallel
495 * setup_net() and cleanup_net() are not possible.
498 if (atomic_read(&net->dev_unreg_count) > 0) {
499 unregistering = true;
507 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
509 remove_wait_queue(&netdev_unregistering_wq, &wait);
513 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
514 * @ops: struct rtnl_link_ops * to unregister
516 void rtnl_link_unregister(struct rtnl_link_ops *ops)
518 /* Close the race with setup_net() and cleanup_net() */
519 down_write(&pernet_ops_rwsem);
520 rtnl_lock_unregistering_all();
521 __rtnl_link_unregister(ops);
523 up_write(&pernet_ops_rwsem);
525 EXPORT_SYMBOL_GPL(rtnl_link_unregister);
527 static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
529 struct net_device *master_dev;
530 const struct rtnl_link_ops *ops;
535 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
539 ops = master_dev->rtnl_link_ops;
540 if (!ops || !ops->get_slave_size)
542 /* IFLA_INFO_SLAVE_DATA + nested data */
543 size = nla_total_size(sizeof(struct nlattr)) +
544 ops->get_slave_size(master_dev, dev);
551 static size_t rtnl_link_get_size(const struct net_device *dev)
553 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
559 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
560 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
563 /* IFLA_INFO_DATA + nested data */
564 size += nla_total_size(sizeof(struct nlattr)) +
567 if (ops->get_xstats_size)
568 /* IFLA_INFO_XSTATS */
569 size += nla_total_size(ops->get_xstats_size(dev));
571 size += rtnl_link_get_slave_info_data_size(dev);
576 static LIST_HEAD(rtnl_af_ops);
578 static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
580 const struct rtnl_af_ops *ops;
584 list_for_each_entry(ops, &rtnl_af_ops, list) {
585 if (ops->family == family)
593 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
594 * @ops: struct rtnl_af_ops * to register
596 * Returns 0 on success or a negative error code.
598 void rtnl_af_register(struct rtnl_af_ops *ops)
601 list_add_tail_rcu(&ops->list, &rtnl_af_ops);
604 EXPORT_SYMBOL_GPL(rtnl_af_register);
607 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
608 * @ops: struct rtnl_af_ops * to unregister
610 void rtnl_af_unregister(struct rtnl_af_ops *ops)
613 list_del_rcu(&ops->list);
618 EXPORT_SYMBOL_GPL(rtnl_af_unregister);
620 static size_t rtnl_link_get_af_size(const struct net_device *dev,
623 struct rtnl_af_ops *af_ops;
627 size = nla_total_size(sizeof(struct nlattr));
630 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
631 if (af_ops->get_link_af_size) {
632 /* AF_* + nested data */
633 size += nla_total_size(sizeof(struct nlattr)) +
634 af_ops->get_link_af_size(dev, ext_filter_mask);
642 static bool rtnl_have_link_slave_info(const struct net_device *dev)
644 struct net_device *master_dev;
649 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
650 if (master_dev && master_dev->rtnl_link_ops)
656 static int rtnl_link_slave_info_fill(struct sk_buff *skb,
657 const struct net_device *dev)
659 struct net_device *master_dev;
660 const struct rtnl_link_ops *ops;
661 struct nlattr *slave_data;
664 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
667 ops = master_dev->rtnl_link_ops;
670 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
672 if (ops->fill_slave_info) {
673 slave_data = nla_nest_start_noflag(skb, IFLA_INFO_SLAVE_DATA);
676 err = ops->fill_slave_info(skb, master_dev, dev);
678 goto err_cancel_slave_data;
679 nla_nest_end(skb, slave_data);
683 err_cancel_slave_data:
684 nla_nest_cancel(skb, slave_data);
688 static int rtnl_link_info_fill(struct sk_buff *skb,
689 const struct net_device *dev)
691 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
697 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
699 if (ops->fill_xstats) {
700 err = ops->fill_xstats(skb, dev);
704 if (ops->fill_info) {
705 data = nla_nest_start_noflag(skb, IFLA_INFO_DATA);
708 err = ops->fill_info(skb, dev);
710 goto err_cancel_data;
711 nla_nest_end(skb, data);
716 nla_nest_cancel(skb, data);
720 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
722 struct nlattr *linkinfo;
725 linkinfo = nla_nest_start_noflag(skb, IFLA_LINKINFO);
726 if (linkinfo == NULL)
729 err = rtnl_link_info_fill(skb, dev);
731 goto err_cancel_link;
733 err = rtnl_link_slave_info_fill(skb, dev);
735 goto err_cancel_link;
737 nla_nest_end(skb, linkinfo);
741 nla_nest_cancel(skb, linkinfo);
746 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
748 struct sock *rtnl = net->rtnl;
750 return nlmsg_notify(rtnl, skb, pid, group, echo, GFP_KERNEL);
753 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
755 struct sock *rtnl = net->rtnl;
757 return nlmsg_unicast(rtnl, skb, pid);
759 EXPORT_SYMBOL(rtnl_unicast);
761 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
762 const struct nlmsghdr *nlh, gfp_t flags)
764 struct sock *rtnl = net->rtnl;
766 nlmsg_notify(rtnl, skb, pid, group, nlmsg_report(nlh), flags);
768 EXPORT_SYMBOL(rtnl_notify);
770 void rtnl_set_sk_err(struct net *net, u32 group, int error)
772 struct sock *rtnl = net->rtnl;
774 netlink_set_err(rtnl, 0, group, error);
776 EXPORT_SYMBOL(rtnl_set_sk_err);
778 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
783 /* nothing is dumped for dst_default_metrics, so just skip the loop */
784 if (metrics == dst_default_metrics.metrics)
787 mx = nla_nest_start_noflag(skb, RTA_METRICS);
791 for (i = 0; i < RTAX_MAX; i++) {
793 if (i == RTAX_CC_ALGO - 1) {
794 char tmp[TCP_CA_NAME_MAX], *name;
796 name = tcp_ca_get_name_by_key(metrics[i], tmp);
799 if (nla_put_string(skb, i + 1, name))
800 goto nla_put_failure;
801 } else if (i == RTAX_FEATURES - 1) {
802 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
806 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
807 if (nla_put_u32(skb, i + 1, user_features))
808 goto nla_put_failure;
810 if (nla_put_u32(skb, i + 1, metrics[i]))
811 goto nla_put_failure;
818 nla_nest_cancel(skb, mx);
822 return nla_nest_end(skb, mx);
825 nla_nest_cancel(skb, mx);
828 EXPORT_SYMBOL(rtnetlink_put_metrics);
830 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
831 long expires, u32 error)
833 struct rta_cacheinfo ci = {
839 ci.rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse);
840 ci.rta_used = dst->__use;
841 ci.rta_clntref = rcuref_read(&dst->__rcuref);
846 clock = jiffies_to_clock_t(abs(expires));
847 clock = min_t(unsigned long, clock, INT_MAX);
848 ci.rta_expires = (expires > 0) ? clock : -clock;
850 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
852 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
854 static void set_operstate(struct net_device *dev, unsigned char transition)
856 unsigned char operstate = dev->operstate;
858 switch (transition) {
860 if ((operstate == IF_OPER_DORMANT ||
861 operstate == IF_OPER_TESTING ||
862 operstate == IF_OPER_UNKNOWN) &&
863 !netif_dormant(dev) && !netif_testing(dev))
864 operstate = IF_OPER_UP;
867 case IF_OPER_TESTING:
868 if (netif_oper_up(dev))
869 operstate = IF_OPER_TESTING;
872 case IF_OPER_DORMANT:
873 if (netif_oper_up(dev))
874 operstate = IF_OPER_DORMANT;
878 if (dev->operstate != operstate) {
879 write_lock(&dev_base_lock);
880 dev->operstate = operstate;
881 write_unlock(&dev_base_lock);
882 netdev_state_change(dev);
886 static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
888 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
889 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
892 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
893 const struct ifinfomsg *ifm)
895 unsigned int flags = ifm->ifi_flags;
897 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
899 flags = (flags & ifm->ifi_change) |
900 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
905 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
906 const struct rtnl_link_stats64 *b)
908 a->rx_packets = b->rx_packets;
909 a->tx_packets = b->tx_packets;
910 a->rx_bytes = b->rx_bytes;
911 a->tx_bytes = b->tx_bytes;
912 a->rx_errors = b->rx_errors;
913 a->tx_errors = b->tx_errors;
914 a->rx_dropped = b->rx_dropped;
915 a->tx_dropped = b->tx_dropped;
917 a->multicast = b->multicast;
918 a->collisions = b->collisions;
920 a->rx_length_errors = b->rx_length_errors;
921 a->rx_over_errors = b->rx_over_errors;
922 a->rx_crc_errors = b->rx_crc_errors;
923 a->rx_frame_errors = b->rx_frame_errors;
924 a->rx_fifo_errors = b->rx_fifo_errors;
925 a->rx_missed_errors = b->rx_missed_errors;
927 a->tx_aborted_errors = b->tx_aborted_errors;
928 a->tx_carrier_errors = b->tx_carrier_errors;
929 a->tx_fifo_errors = b->tx_fifo_errors;
930 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
931 a->tx_window_errors = b->tx_window_errors;
933 a->rx_compressed = b->rx_compressed;
934 a->tx_compressed = b->tx_compressed;
936 a->rx_nohandler = b->rx_nohandler;
940 static inline int rtnl_vfinfo_size(const struct net_device *dev,
943 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) {
944 int num_vfs = dev_num_vf(dev->dev.parent);
945 size_t size = nla_total_size(0);
948 nla_total_size(sizeof(struct ifla_vf_mac)) +
949 nla_total_size(sizeof(struct ifla_vf_broadcast)) +
950 nla_total_size(sizeof(struct ifla_vf_vlan)) +
951 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */
952 nla_total_size(MAX_VLAN_LIST_LEN *
953 sizeof(struct ifla_vf_vlan_info)) +
954 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
955 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
956 nla_total_size(sizeof(struct ifla_vf_rate)) +
957 nla_total_size(sizeof(struct ifla_vf_link_state)) +
958 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
959 nla_total_size(sizeof(struct ifla_vf_trust)));
960 if (~ext_filter_mask & RTEXT_FILTER_SKIP_STATS) {
962 (nla_total_size(0) + /* nest IFLA_VF_STATS */
963 /* IFLA_VF_STATS_RX_PACKETS */
964 nla_total_size_64bit(sizeof(__u64)) +
965 /* IFLA_VF_STATS_TX_PACKETS */
966 nla_total_size_64bit(sizeof(__u64)) +
967 /* IFLA_VF_STATS_RX_BYTES */
968 nla_total_size_64bit(sizeof(__u64)) +
969 /* IFLA_VF_STATS_TX_BYTES */
970 nla_total_size_64bit(sizeof(__u64)) +
971 /* IFLA_VF_STATS_BROADCAST */
972 nla_total_size_64bit(sizeof(__u64)) +
973 /* IFLA_VF_STATS_MULTICAST */
974 nla_total_size_64bit(sizeof(__u64)) +
975 /* IFLA_VF_STATS_RX_DROPPED */
976 nla_total_size_64bit(sizeof(__u64)) +
977 /* IFLA_VF_STATS_TX_DROPPED */
978 nla_total_size_64bit(sizeof(__u64)));
985 static size_t rtnl_port_size(const struct net_device *dev,
988 size_t port_size = nla_total_size(4) /* PORT_VF */
989 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
990 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
991 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
992 + nla_total_size(1) /* PROT_VDP_REQUEST */
993 + nla_total_size(2); /* PORT_VDP_RESPONSE */
994 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
995 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
997 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
1000 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1001 !(ext_filter_mask & RTEXT_FILTER_VF))
1003 if (dev_num_vf(dev->dev.parent))
1004 return port_self_size + vf_ports_size +
1005 vf_port_size * dev_num_vf(dev->dev.parent);
1007 return port_self_size;
1010 static size_t rtnl_xdp_size(void)
1012 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */
1013 nla_total_size(1) + /* XDP_ATTACHED */
1014 nla_total_size(4) + /* XDP_PROG_ID (or 1st mode) */
1015 nla_total_size(4); /* XDP_<mode>_PROG_ID */
1020 static size_t rtnl_prop_list_size(const struct net_device *dev)
1022 struct netdev_name_node *name_node;
1023 unsigned int cnt = 0;
1026 list_for_each_entry_rcu(name_node, &dev->name_node->list, list)
1033 return nla_total_size(0) + cnt * nla_total_size(ALTIFNAMSIZ);
1036 static size_t rtnl_proto_down_size(const struct net_device *dev)
1038 size_t size = nla_total_size(1);
1040 if (dev->proto_down_reason)
1041 size += nla_total_size(0) + nla_total_size(4);
1046 static size_t rtnl_devlink_port_size(const struct net_device *dev)
1048 size_t size = nla_total_size(0); /* nest IFLA_DEVLINK_PORT */
1050 if (dev->devlink_port)
1051 size += devlink_nl_port_handle_size(dev->devlink_port);
1056 static size_t rtnl_dpll_pin_size(const struct net_device *dev)
1058 size_t size = nla_total_size(0); /* nest IFLA_DPLL_PIN */
1060 size += dpll_netdev_pin_handle_size(dev);
1065 static noinline size_t if_nlmsg_size(const struct net_device *dev,
1066 u32 ext_filter_mask)
1068 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
1069 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
1070 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
1071 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
1072 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
1073 + nla_total_size(sizeof(struct rtnl_link_stats))
1074 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
1075 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
1076 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
1077 + nla_total_size(4) /* IFLA_TXQLEN */
1078 + nla_total_size(4) /* IFLA_WEIGHT */
1079 + nla_total_size(4) /* IFLA_MTU */
1080 + nla_total_size(4) /* IFLA_LINK */
1081 + nla_total_size(4) /* IFLA_MASTER */
1082 + nla_total_size(1) /* IFLA_CARRIER */
1083 + nla_total_size(4) /* IFLA_PROMISCUITY */
1084 + nla_total_size(4) /* IFLA_ALLMULTI */
1085 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
1086 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
1087 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
1088 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
1089 + nla_total_size(4) /* IFLA_GRO_MAX_SIZE */
1090 + nla_total_size(4) /* IFLA_GSO_IPV4_MAX_SIZE */
1091 + nla_total_size(4) /* IFLA_GRO_IPV4_MAX_SIZE */
1092 + nla_total_size(4) /* IFLA_TSO_MAX_SIZE */
1093 + nla_total_size(4) /* IFLA_TSO_MAX_SEGS */
1094 + nla_total_size(1) /* IFLA_OPERSTATE */
1095 + nla_total_size(1) /* IFLA_LINKMODE */
1096 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
1097 + nla_total_size(4) /* IFLA_LINK_NETNSID */
1098 + nla_total_size(4) /* IFLA_GROUP */
1099 + nla_total_size(ext_filter_mask
1100 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
1101 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
1102 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
1103 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
1104 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
1105 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
1106 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
1107 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
1108 + rtnl_xdp_size() /* IFLA_XDP */
1109 + nla_total_size(4) /* IFLA_EVENT */
1110 + nla_total_size(4) /* IFLA_NEW_NETNSID */
1111 + nla_total_size(4) /* IFLA_NEW_IFINDEX */
1112 + rtnl_proto_down_size(dev) /* proto down */
1113 + nla_total_size(4) /* IFLA_TARGET_NETNSID */
1114 + nla_total_size(4) /* IFLA_CARRIER_UP_COUNT */
1115 + nla_total_size(4) /* IFLA_CARRIER_DOWN_COUNT */
1116 + nla_total_size(4) /* IFLA_MIN_MTU */
1117 + nla_total_size(4) /* IFLA_MAX_MTU */
1118 + rtnl_prop_list_size(dev)
1119 + nla_total_size(MAX_ADDR_LEN) /* IFLA_PERM_ADDRESS */
1120 + rtnl_devlink_port_size(dev)
1121 + rtnl_dpll_pin_size(dev)
1125 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
1127 struct nlattr *vf_ports;
1128 struct nlattr *vf_port;
1132 vf_ports = nla_nest_start_noflag(skb, IFLA_VF_PORTS);
1136 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
1137 vf_port = nla_nest_start_noflag(skb, IFLA_VF_PORT);
1139 goto nla_put_failure;
1140 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
1141 goto nla_put_failure;
1142 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
1143 if (err == -EMSGSIZE)
1144 goto nla_put_failure;
1146 nla_nest_cancel(skb, vf_port);
1149 nla_nest_end(skb, vf_port);
1152 nla_nest_end(skb, vf_ports);
1157 nla_nest_cancel(skb, vf_ports);
1161 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
1163 struct nlattr *port_self;
1166 port_self = nla_nest_start_noflag(skb, IFLA_PORT_SELF);
1170 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
1172 nla_nest_cancel(skb, port_self);
1173 return (err == -EMSGSIZE) ? err : 0;
1176 nla_nest_end(skb, port_self);
1181 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1182 u32 ext_filter_mask)
1186 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1187 !(ext_filter_mask & RTEXT_FILTER_VF))
1190 err = rtnl_port_self_fill(skb, dev);
1194 if (dev_num_vf(dev->dev.parent)) {
1195 err = rtnl_vf_ports_fill(skb, dev);
1203 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1206 struct netdev_phys_item_id ppid;
1208 err = dev_get_phys_port_id(dev, &ppid);
1210 if (err == -EOPNOTSUPP)
1215 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1221 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1223 char name[IFNAMSIZ];
1226 err = dev_get_phys_port_name(dev, name, sizeof(name));
1228 if (err == -EOPNOTSUPP)
1233 if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
1239 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1241 struct netdev_phys_item_id ppid = { };
1244 err = dev_get_port_parent_id(dev, &ppid, false);
1246 if (err == -EOPNOTSUPP)
1251 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, ppid.id_len, ppid.id))
1257 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1258 struct net_device *dev)
1260 struct rtnl_link_stats64 *sp;
1261 struct nlattr *attr;
1263 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1264 sizeof(struct rtnl_link_stats64), IFLA_PAD);
1268 sp = nla_data(attr);
1269 dev_get_stats(dev, sp);
1271 attr = nla_reserve(skb, IFLA_STATS,
1272 sizeof(struct rtnl_link_stats));
1276 copy_rtnl_link_stats(nla_data(attr), sp);
1281 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1282 struct net_device *dev,
1284 u32 ext_filter_mask)
1286 struct ifla_vf_rss_query_en vf_rss_query_en;
1287 struct nlattr *vf, *vfstats, *vfvlanlist;
1288 struct ifla_vf_link_state vf_linkstate;
1289 struct ifla_vf_vlan_info vf_vlan_info;
1290 struct ifla_vf_spoofchk vf_spoofchk;
1291 struct ifla_vf_tx_rate vf_tx_rate;
1292 struct ifla_vf_stats vf_stats;
1293 struct ifla_vf_trust vf_trust;
1294 struct ifla_vf_vlan vf_vlan;
1295 struct ifla_vf_rate vf_rate;
1296 struct ifla_vf_mac vf_mac;
1297 struct ifla_vf_broadcast vf_broadcast;
1298 struct ifla_vf_info ivi;
1299 struct ifla_vf_guid node_guid;
1300 struct ifla_vf_guid port_guid;
1302 memset(&ivi, 0, sizeof(ivi));
1304 /* Not all SR-IOV capable drivers support the
1305 * spoofcheck and "RSS query enable" query. Preset to
1306 * -1 so the user space tool can detect that the driver
1307 * didn't report anything.
1310 ivi.rss_query_en = -1;
1312 /* The default value for VF link state is "auto"
1313 * IFLA_VF_LINK_STATE_AUTO which equals zero
1316 /* VLAN Protocol by default is 802.1Q */
1317 ivi.vlan_proto = htons(ETH_P_8021Q);
1318 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1321 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
1322 memset(&node_guid, 0, sizeof(node_guid));
1323 memset(&port_guid, 0, sizeof(port_guid));
1332 vf_rss_query_en.vf =
1335 port_guid.vf = ivi.vf;
1337 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1338 memcpy(vf_broadcast.broadcast, dev->broadcast, dev->addr_len);
1339 vf_vlan.vlan = ivi.vlan;
1340 vf_vlan.qos = ivi.qos;
1341 vf_vlan_info.vlan = ivi.vlan;
1342 vf_vlan_info.qos = ivi.qos;
1343 vf_vlan_info.vlan_proto = ivi.vlan_proto;
1344 vf_tx_rate.rate = ivi.max_tx_rate;
1345 vf_rate.min_tx_rate = ivi.min_tx_rate;
1346 vf_rate.max_tx_rate = ivi.max_tx_rate;
1347 vf_spoofchk.setting = ivi.spoofchk;
1348 vf_linkstate.link_state = ivi.linkstate;
1349 vf_rss_query_en.setting = ivi.rss_query_en;
1350 vf_trust.setting = ivi.trusted;
1351 vf = nla_nest_start_noflag(skb, IFLA_VF_INFO);
1354 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1355 nla_put(skb, IFLA_VF_BROADCAST, sizeof(vf_broadcast), &vf_broadcast) ||
1356 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1357 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1359 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1361 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1363 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1365 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1366 sizeof(vf_rss_query_en),
1367 &vf_rss_query_en) ||
1368 nla_put(skb, IFLA_VF_TRUST,
1369 sizeof(vf_trust), &vf_trust))
1370 goto nla_put_vf_failure;
1372 if (dev->netdev_ops->ndo_get_vf_guid &&
1373 !dev->netdev_ops->ndo_get_vf_guid(dev, vfs_num, &node_guid,
1375 if (nla_put(skb, IFLA_VF_IB_NODE_GUID, sizeof(node_guid),
1377 nla_put(skb, IFLA_VF_IB_PORT_GUID, sizeof(port_guid),
1379 goto nla_put_vf_failure;
1381 vfvlanlist = nla_nest_start_noflag(skb, IFLA_VF_VLAN_LIST);
1383 goto nla_put_vf_failure;
1384 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1386 nla_nest_cancel(skb, vfvlanlist);
1387 goto nla_put_vf_failure;
1389 nla_nest_end(skb, vfvlanlist);
1390 if (~ext_filter_mask & RTEXT_FILTER_SKIP_STATS) {
1391 memset(&vf_stats, 0, sizeof(vf_stats));
1392 if (dev->netdev_ops->ndo_get_vf_stats)
1393 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1395 vfstats = nla_nest_start_noflag(skb, IFLA_VF_STATS);
1397 goto nla_put_vf_failure;
1398 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1399 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1400 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1401 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1402 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1403 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1404 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1405 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1406 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1407 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1408 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
1409 vf_stats.multicast, IFLA_VF_STATS_PAD) ||
1410 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_DROPPED,
1411 vf_stats.rx_dropped, IFLA_VF_STATS_PAD) ||
1412 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_DROPPED,
1413 vf_stats.tx_dropped, IFLA_VF_STATS_PAD)) {
1414 nla_nest_cancel(skb, vfstats);
1415 goto nla_put_vf_failure;
1417 nla_nest_end(skb, vfstats);
1419 nla_nest_end(skb, vf);
1423 nla_nest_cancel(skb, vf);
1427 static noinline_for_stack int rtnl_fill_vf(struct sk_buff *skb,
1428 struct net_device *dev,
1429 u32 ext_filter_mask)
1431 struct nlattr *vfinfo;
1434 if (!dev->dev.parent || ((ext_filter_mask & RTEXT_FILTER_VF) == 0))
1437 num_vfs = dev_num_vf(dev->dev.parent);
1438 if (nla_put_u32(skb, IFLA_NUM_VF, num_vfs))
1441 if (!dev->netdev_ops->ndo_get_vf_config)
1444 vfinfo = nla_nest_start_noflag(skb, IFLA_VFINFO_LIST);
1448 for (i = 0; i < num_vfs; i++) {
1449 if (rtnl_fill_vfinfo(skb, dev, i, ext_filter_mask)) {
1450 nla_nest_cancel(skb, vfinfo);
1455 nla_nest_end(skb, vfinfo);
1459 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1461 struct rtnl_link_ifmap map;
1463 memset(&map, 0, sizeof(map));
1464 map.mem_start = dev->mem_start;
1465 map.mem_end = dev->mem_end;
1466 map.base_addr = dev->base_addr;
1469 map.port = dev->if_port;
1471 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
1477 static u32 rtnl_xdp_prog_skb(struct net_device *dev)
1479 const struct bpf_prog *generic_xdp_prog;
1483 generic_xdp_prog = rtnl_dereference(dev->xdp_prog);
1484 if (!generic_xdp_prog)
1486 return generic_xdp_prog->aux->id;
1489 static u32 rtnl_xdp_prog_drv(struct net_device *dev)
1491 return dev_xdp_prog_id(dev, XDP_MODE_DRV);
1494 static u32 rtnl_xdp_prog_hw(struct net_device *dev)
1496 return dev_xdp_prog_id(dev, XDP_MODE_HW);
1499 static int rtnl_xdp_report_one(struct sk_buff *skb, struct net_device *dev,
1500 u32 *prog_id, u8 *mode, u8 tgt_mode, u32 attr,
1501 u32 (*get_prog_id)(struct net_device *dev))
1506 curr_id = get_prog_id(dev);
1511 err = nla_put_u32(skb, attr, curr_id);
1515 if (*mode != XDP_ATTACHED_NONE)
1516 *mode = XDP_ATTACHED_MULTI;
1523 static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1530 xdp = nla_nest_start_noflag(skb, IFLA_XDP);
1535 mode = XDP_ATTACHED_NONE;
1536 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_SKB,
1537 IFLA_XDP_SKB_PROG_ID, rtnl_xdp_prog_skb);
1540 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_DRV,
1541 IFLA_XDP_DRV_PROG_ID, rtnl_xdp_prog_drv);
1544 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_HW,
1545 IFLA_XDP_HW_PROG_ID, rtnl_xdp_prog_hw);
1549 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, mode);
1553 if (prog_id && mode != XDP_ATTACHED_MULTI) {
1554 err = nla_put_u32(skb, IFLA_XDP_PROG_ID, prog_id);
1559 nla_nest_end(skb, xdp);
1563 nla_nest_cancel(skb, xdp);
1567 static u32 rtnl_get_event(unsigned long event)
1569 u32 rtnl_event_type = IFLA_EVENT_NONE;
1573 rtnl_event_type = IFLA_EVENT_REBOOT;
1575 case NETDEV_FEAT_CHANGE:
1576 rtnl_event_type = IFLA_EVENT_FEATURES;
1578 case NETDEV_BONDING_FAILOVER:
1579 rtnl_event_type = IFLA_EVENT_BONDING_FAILOVER;
1581 case NETDEV_NOTIFY_PEERS:
1582 rtnl_event_type = IFLA_EVENT_NOTIFY_PEERS;
1584 case NETDEV_RESEND_IGMP:
1585 rtnl_event_type = IFLA_EVENT_IGMP_RESEND;
1587 case NETDEV_CHANGEINFODATA:
1588 rtnl_event_type = IFLA_EVENT_BONDING_OPTIONS;
1594 return rtnl_event_type;
1597 static int put_master_ifindex(struct sk_buff *skb, struct net_device *dev)
1599 const struct net_device *upper_dev;
1604 upper_dev = netdev_master_upper_dev_get_rcu(dev);
1606 ret = nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex);
1612 static int nla_put_iflink(struct sk_buff *skb, const struct net_device *dev,
1615 int ifindex = dev_get_iflink(dev);
1617 if (force || dev->ifindex != ifindex)
1618 return nla_put_u32(skb, IFLA_LINK, ifindex);
1623 static noinline_for_stack int nla_put_ifalias(struct sk_buff *skb,
1624 struct net_device *dev)
1629 ret = dev_get_alias(dev, buf, sizeof(buf));
1630 return ret > 0 ? nla_put_string(skb, IFLA_IFALIAS, buf) : 0;
1633 static int rtnl_fill_link_netnsid(struct sk_buff *skb,
1634 const struct net_device *dev,
1635 struct net *src_net, gfp_t gfp)
1637 bool put_iflink = false;
1639 if (dev->rtnl_link_ops && dev->rtnl_link_ops->get_link_net) {
1640 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1642 if (!net_eq(dev_net(dev), link_net)) {
1643 int id = peernet2id_alloc(src_net, link_net, gfp);
1645 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1652 return nla_put_iflink(skb, dev, put_iflink);
1655 static int rtnl_fill_link_af(struct sk_buff *skb,
1656 const struct net_device *dev,
1657 u32 ext_filter_mask)
1659 const struct rtnl_af_ops *af_ops;
1660 struct nlattr *af_spec;
1662 af_spec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
1666 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
1670 if (!af_ops->fill_link_af)
1673 af = nla_nest_start_noflag(skb, af_ops->family);
1677 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1679 * Caller may return ENODATA to indicate that there
1680 * was no data to be dumped. This is not an error, it
1681 * means we should trim the attribute header and
1684 if (err == -ENODATA)
1685 nla_nest_cancel(skb, af);
1689 nla_nest_end(skb, af);
1692 nla_nest_end(skb, af_spec);
1696 static int rtnl_fill_alt_ifnames(struct sk_buff *skb,
1697 const struct net_device *dev)
1699 struct netdev_name_node *name_node;
1702 list_for_each_entry(name_node, &dev->name_node->list, list) {
1703 if (nla_put_string(skb, IFLA_ALT_IFNAME, name_node->name))
1710 static int rtnl_fill_prop_list(struct sk_buff *skb,
1711 const struct net_device *dev)
1713 struct nlattr *prop_list;
1716 prop_list = nla_nest_start(skb, IFLA_PROP_LIST);
1720 ret = rtnl_fill_alt_ifnames(skb, dev);
1724 nla_nest_end(skb, prop_list);
1728 nla_nest_cancel(skb, prop_list);
1732 static int rtnl_fill_proto_down(struct sk_buff *skb,
1733 const struct net_device *dev)
1738 if (nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
1739 goto nla_put_failure;
1741 preason = dev->proto_down_reason;
1745 pr = nla_nest_start(skb, IFLA_PROTO_DOWN_REASON);
1749 if (nla_put_u32(skb, IFLA_PROTO_DOWN_REASON_VALUE, preason)) {
1750 nla_nest_cancel(skb, pr);
1751 goto nla_put_failure;
1754 nla_nest_end(skb, pr);
1761 static int rtnl_fill_devlink_port(struct sk_buff *skb,
1762 const struct net_device *dev)
1764 struct nlattr *devlink_port_nest;
1767 devlink_port_nest = nla_nest_start(skb, IFLA_DEVLINK_PORT);
1768 if (!devlink_port_nest)
1771 if (dev->devlink_port) {
1772 ret = devlink_nl_port_handle_fill(skb, dev->devlink_port);
1777 nla_nest_end(skb, devlink_port_nest);
1781 nla_nest_cancel(skb, devlink_port_nest);
1785 static int rtnl_fill_dpll_pin(struct sk_buff *skb,
1786 const struct net_device *dev)
1788 struct nlattr *dpll_pin_nest;
1791 dpll_pin_nest = nla_nest_start(skb, IFLA_DPLL_PIN);
1795 ret = dpll_netdev_add_pin_handle(skb, dev);
1799 nla_nest_end(skb, dpll_pin_nest);
1803 nla_nest_cancel(skb, dpll_pin_nest);
1807 static int rtnl_fill_ifinfo(struct sk_buff *skb,
1808 struct net_device *dev, struct net *src_net,
1809 int type, u32 pid, u32 seq, u32 change,
1810 unsigned int flags, u32 ext_filter_mask,
1811 u32 event, int *new_nsid, int new_ifindex,
1812 int tgt_netnsid, gfp_t gfp)
1814 struct ifinfomsg *ifm;
1815 struct nlmsghdr *nlh;
1816 struct Qdisc *qdisc;
1819 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1823 ifm = nlmsg_data(nlh);
1824 ifm->ifi_family = AF_UNSPEC;
1826 ifm->ifi_type = dev->type;
1827 ifm->ifi_index = dev->ifindex;
1828 ifm->ifi_flags = dev_get_flags(dev);
1829 ifm->ifi_change = change;
1831 if (tgt_netnsid >= 0 && nla_put_s32(skb, IFLA_TARGET_NETNSID, tgt_netnsid))
1832 goto nla_put_failure;
1834 qdisc = rtnl_dereference(dev->qdisc);
1835 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1836 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1837 nla_put_u8(skb, IFLA_OPERSTATE,
1838 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1839 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1840 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1841 nla_put_u32(skb, IFLA_MIN_MTU, dev->min_mtu) ||
1842 nla_put_u32(skb, IFLA_MAX_MTU, dev->max_mtu) ||
1843 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1844 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
1845 nla_put_u32(skb, IFLA_ALLMULTI, dev->allmulti) ||
1846 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1847 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1848 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1849 nla_put_u32(skb, IFLA_GRO_MAX_SIZE, dev->gro_max_size) ||
1850 nla_put_u32(skb, IFLA_GSO_IPV4_MAX_SIZE, dev->gso_ipv4_max_size) ||
1851 nla_put_u32(skb, IFLA_GRO_IPV4_MAX_SIZE, dev->gro_ipv4_max_size) ||
1852 nla_put_u32(skb, IFLA_TSO_MAX_SIZE, dev->tso_max_size) ||
1853 nla_put_u32(skb, IFLA_TSO_MAX_SEGS, dev->tso_max_segs) ||
1855 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1857 put_master_ifindex(skb, dev) ||
1858 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1860 nla_put_string(skb, IFLA_QDISC, qdisc->ops->id)) ||
1861 nla_put_ifalias(skb, dev) ||
1862 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1863 atomic_read(&dev->carrier_up_count) +
1864 atomic_read(&dev->carrier_down_count)) ||
1865 nla_put_u32(skb, IFLA_CARRIER_UP_COUNT,
1866 atomic_read(&dev->carrier_up_count)) ||
1867 nla_put_u32(skb, IFLA_CARRIER_DOWN_COUNT,
1868 atomic_read(&dev->carrier_down_count)))
1869 goto nla_put_failure;
1871 if (rtnl_fill_proto_down(skb, dev))
1872 goto nla_put_failure;
1874 if (event != IFLA_EVENT_NONE) {
1875 if (nla_put_u32(skb, IFLA_EVENT, event))
1876 goto nla_put_failure;
1879 if (rtnl_fill_link_ifmap(skb, dev))
1880 goto nla_put_failure;
1882 if (dev->addr_len) {
1883 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1884 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1885 goto nla_put_failure;
1888 if (rtnl_phys_port_id_fill(skb, dev))
1889 goto nla_put_failure;
1891 if (rtnl_phys_port_name_fill(skb, dev))
1892 goto nla_put_failure;
1894 if (rtnl_phys_switch_id_fill(skb, dev))
1895 goto nla_put_failure;
1897 if (rtnl_fill_stats(skb, dev))
1898 goto nla_put_failure;
1900 if (rtnl_fill_vf(skb, dev, ext_filter_mask))
1901 goto nla_put_failure;
1903 if (rtnl_port_fill(skb, dev, ext_filter_mask))
1904 goto nla_put_failure;
1906 if (rtnl_xdp_fill(skb, dev))
1907 goto nla_put_failure;
1909 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1910 if (rtnl_link_fill(skb, dev) < 0)
1911 goto nla_put_failure;
1914 if (rtnl_fill_link_netnsid(skb, dev, src_net, gfp))
1915 goto nla_put_failure;
1918 nla_put_s32(skb, IFLA_NEW_NETNSID, *new_nsid) < 0)
1919 goto nla_put_failure;
1921 nla_put_s32(skb, IFLA_NEW_IFINDEX, new_ifindex) < 0)
1922 goto nla_put_failure;
1924 if (memchr_inv(dev->perm_addr, '\0', dev->addr_len) &&
1925 nla_put(skb, IFLA_PERM_ADDRESS, dev->addr_len, dev->perm_addr))
1926 goto nla_put_failure;
1929 if (rtnl_fill_link_af(skb, dev, ext_filter_mask))
1930 goto nla_put_failure_rcu;
1933 if (rtnl_fill_prop_list(skb, dev))
1934 goto nla_put_failure;
1936 if (dev->dev.parent &&
1937 nla_put_string(skb, IFLA_PARENT_DEV_NAME,
1938 dev_name(dev->dev.parent)))
1939 goto nla_put_failure;
1941 if (dev->dev.parent && dev->dev.parent->bus &&
1942 nla_put_string(skb, IFLA_PARENT_DEV_BUS_NAME,
1943 dev->dev.parent->bus->name))
1944 goto nla_put_failure;
1946 if (rtnl_fill_devlink_port(skb, dev))
1947 goto nla_put_failure;
1949 if (rtnl_fill_dpll_pin(skb, dev))
1950 goto nla_put_failure;
1952 nlmsg_end(skb, nlh);
1955 nla_put_failure_rcu:
1958 nlmsg_cancel(skb, nlh);
1962 static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1963 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1964 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1965 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1966 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1967 [IFLA_MTU] = { .type = NLA_U32 },
1968 [IFLA_LINK] = { .type = NLA_U32 },
1969 [IFLA_MASTER] = { .type = NLA_U32 },
1970 [IFLA_CARRIER] = { .type = NLA_U8 },
1971 [IFLA_TXQLEN] = { .type = NLA_U32 },
1972 [IFLA_WEIGHT] = { .type = NLA_U32 },
1973 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1974 [IFLA_LINKMODE] = { .type = NLA_U8 },
1975 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1976 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1977 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1978 /* IFLA_IFALIAS is a string, but policy is set to NLA_BINARY to
1979 * allow 0-length string (needed to remove an alias).
1981 [IFLA_IFALIAS] = { .type = NLA_BINARY, .len = IFALIASZ - 1 },
1982 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1983 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1984 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1985 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1986 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1987 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1988 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1989 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1990 [IFLA_GSO_MAX_SEGS] = { .type = NLA_U32 },
1991 [IFLA_GSO_MAX_SIZE] = { .type = NLA_U32 },
1992 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1993 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
1994 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1995 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
1996 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
1997 [IFLA_XDP] = { .type = NLA_NESTED },
1998 [IFLA_EVENT] = { .type = NLA_U32 },
1999 [IFLA_GROUP] = { .type = NLA_U32 },
2000 [IFLA_TARGET_NETNSID] = { .type = NLA_S32 },
2001 [IFLA_CARRIER_UP_COUNT] = { .type = NLA_U32 },
2002 [IFLA_CARRIER_DOWN_COUNT] = { .type = NLA_U32 },
2003 [IFLA_MIN_MTU] = { .type = NLA_U32 },
2004 [IFLA_MAX_MTU] = { .type = NLA_U32 },
2005 [IFLA_PROP_LIST] = { .type = NLA_NESTED },
2006 [IFLA_ALT_IFNAME] = { .type = NLA_STRING,
2007 .len = ALTIFNAMSIZ - 1 },
2008 [IFLA_PERM_ADDRESS] = { .type = NLA_REJECT },
2009 [IFLA_PROTO_DOWN_REASON] = { .type = NLA_NESTED },
2010 [IFLA_NEW_IFINDEX] = NLA_POLICY_MIN(NLA_S32, 1),
2011 [IFLA_PARENT_DEV_NAME] = { .type = NLA_NUL_STRING },
2012 [IFLA_GRO_MAX_SIZE] = { .type = NLA_U32 },
2013 [IFLA_TSO_MAX_SIZE] = { .type = NLA_REJECT },
2014 [IFLA_TSO_MAX_SEGS] = { .type = NLA_REJECT },
2015 [IFLA_ALLMULTI] = { .type = NLA_REJECT },
2016 [IFLA_GSO_IPV4_MAX_SIZE] = { .type = NLA_U32 },
2017 [IFLA_GRO_IPV4_MAX_SIZE] = { .type = NLA_U32 },
2020 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
2021 [IFLA_INFO_KIND] = { .type = NLA_STRING },
2022 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
2023 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
2024 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
2027 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
2028 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
2029 [IFLA_VF_BROADCAST] = { .type = NLA_REJECT },
2030 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
2031 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
2032 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
2033 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
2034 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
2035 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
2036 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
2037 [IFLA_VF_STATS] = { .type = NLA_NESTED },
2038 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
2039 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
2040 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
2043 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
2044 [IFLA_PORT_VF] = { .type = NLA_U32 },
2045 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
2046 .len = PORT_PROFILE_MAX },
2047 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
2048 .len = PORT_UUID_MAX },
2049 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
2050 .len = PORT_UUID_MAX },
2051 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
2052 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
2054 /* Unused, but we need to keep it here since user space could
2055 * fill it. It's also broken with regard to NLA_BINARY use in
2056 * combination with structs.
2058 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
2059 .len = sizeof(struct ifla_port_vsi) },
2062 static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
2063 [IFLA_XDP_UNSPEC] = { .strict_start_type = IFLA_XDP_EXPECTED_FD },
2064 [IFLA_XDP_FD] = { .type = NLA_S32 },
2065 [IFLA_XDP_EXPECTED_FD] = { .type = NLA_S32 },
2066 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
2067 [IFLA_XDP_FLAGS] = { .type = NLA_U32 },
2068 [IFLA_XDP_PROG_ID] = { .type = NLA_U32 },
2071 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
2073 const struct rtnl_link_ops *ops = NULL;
2074 struct nlattr *linfo[IFLA_INFO_MAX + 1];
2076 if (nla_parse_nested_deprecated(linfo, IFLA_INFO_MAX, nla, ifla_info_policy, NULL) < 0)
2079 if (linfo[IFLA_INFO_KIND]) {
2080 char kind[MODULE_NAME_LEN];
2082 nla_strscpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
2083 ops = rtnl_link_ops_get(kind);
2089 static bool link_master_filtered(struct net_device *dev, int master_idx)
2091 struct net_device *master;
2096 master = netdev_master_upper_dev_get(dev);
2098 /* 0 is already used to denote IFLA_MASTER wasn't passed, therefore need
2099 * another invalid value for ifindex to denote "no master".
2101 if (master_idx == -1)
2104 if (!master || master->ifindex != master_idx)
2110 static bool link_kind_filtered(const struct net_device *dev,
2111 const struct rtnl_link_ops *kind_ops)
2113 if (kind_ops && dev->rtnl_link_ops != kind_ops)
2119 static bool link_dump_filtered(struct net_device *dev,
2121 const struct rtnl_link_ops *kind_ops)
2123 if (link_master_filtered(dev, master_idx) ||
2124 link_kind_filtered(dev, kind_ops))
2131 * rtnl_get_net_ns_capable - Get netns if sufficiently privileged.
2132 * @sk: netlink socket
2133 * @netnsid: network namespace identifier
2135 * Returns the network namespace identified by netnsid on success or an error
2136 * pointer on failure.
2138 struct net *rtnl_get_net_ns_capable(struct sock *sk, int netnsid)
2142 net = get_net_ns_by_id(sock_net(sk), netnsid);
2144 return ERR_PTR(-EINVAL);
2146 /* For now, the caller is required to have CAP_NET_ADMIN in
2147 * the user namespace owning the target net ns.
2149 if (!sk_ns_capable(sk, net->user_ns, CAP_NET_ADMIN)) {
2151 return ERR_PTR(-EACCES);
2155 EXPORT_SYMBOL_GPL(rtnl_get_net_ns_capable);
2157 static int rtnl_valid_dump_ifinfo_req(const struct nlmsghdr *nlh,
2158 bool strict_check, struct nlattr **tb,
2159 struct netlink_ext_ack *extack)
2164 struct ifinfomsg *ifm;
2166 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
2167 NL_SET_ERR_MSG(extack, "Invalid header for link dump");
2171 ifm = nlmsg_data(nlh);
2172 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
2174 NL_SET_ERR_MSG(extack, "Invalid values in header for link dump request");
2177 if (ifm->ifi_index) {
2178 NL_SET_ERR_MSG(extack, "Filter by device index not supported for link dumps");
2182 return nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb,
2183 IFLA_MAX, ifla_policy,
2187 /* A hack to preserve kernel<->userspace interface.
2188 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
2189 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
2190 * what iproute2 < v3.9.0 used.
2191 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
2192 * attribute, its netlink message is shorter than struct ifinfomsg.
2194 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2195 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2197 return nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy,
2201 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
2203 struct netlink_ext_ack *extack = cb->extack;
2204 const struct nlmsghdr *nlh = cb->nlh;
2205 struct net *net = sock_net(skb->sk);
2206 struct net *tgt_net = net;
2209 struct net_device *dev;
2210 struct hlist_head *head;
2211 struct nlattr *tb[IFLA_MAX+1];
2212 u32 ext_filter_mask = 0;
2213 const struct rtnl_link_ops *kind_ops = NULL;
2214 unsigned int flags = NLM_F_MULTI;
2220 s_idx = cb->args[1];
2222 err = rtnl_valid_dump_ifinfo_req(nlh, cb->strict_check, tb, extack);
2224 if (cb->strict_check)
2230 for (i = 0; i <= IFLA_MAX; ++i) {
2234 /* new attributes should only be added with strict checking */
2236 case IFLA_TARGET_NETNSID:
2237 netnsid = nla_get_s32(tb[i]);
2238 tgt_net = rtnl_get_net_ns_capable(skb->sk, netnsid);
2239 if (IS_ERR(tgt_net)) {
2240 NL_SET_ERR_MSG(extack, "Invalid target network namespace id");
2241 return PTR_ERR(tgt_net);
2245 ext_filter_mask = nla_get_u32(tb[i]);
2248 master_idx = nla_get_u32(tb[i]);
2251 kind_ops = linkinfo_to_kind_ops(tb[i]);
2254 if (cb->strict_check) {
2255 NL_SET_ERR_MSG(extack, "Unsupported attribute in link dump request");
2261 if (master_idx || kind_ops)
2262 flags |= NLM_F_DUMP_FILTERED;
2265 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
2267 head = &tgt_net->dev_index_head[h];
2268 hlist_for_each_entry(dev, head, index_hlist) {
2269 if (link_dump_filtered(dev, master_idx, kind_ops))
2273 err = rtnl_fill_ifinfo(skb, dev, net,
2275 NETLINK_CB(cb->skb).portid,
2276 nlh->nlmsg_seq, 0, flags,
2277 ext_filter_mask, 0, NULL, 0,
2278 netnsid, GFP_KERNEL);
2281 if (likely(skb->len))
2295 cb->seq = tgt_net->dev_base_seq;
2296 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
2303 int rtnl_nla_parse_ifinfomsg(struct nlattr **tb, const struct nlattr *nla_peer,
2304 struct netlink_ext_ack *exterr)
2306 const struct ifinfomsg *ifmp;
2307 const struct nlattr *attrs;
2310 ifmp = nla_data(nla_peer);
2311 attrs = nla_data(nla_peer) + sizeof(struct ifinfomsg);
2312 len = nla_len(nla_peer) - sizeof(struct ifinfomsg);
2314 if (ifmp->ifi_index < 0) {
2315 NL_SET_ERR_MSG_ATTR(exterr, nla_peer,
2316 "ifindex can't be negative");
2320 return nla_parse_deprecated(tb, IFLA_MAX, attrs, len, ifla_policy,
2323 EXPORT_SYMBOL(rtnl_nla_parse_ifinfomsg);
2325 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
2328 /* Examine the link attributes and figure out which
2329 * network namespace we are talking about.
2331 if (tb[IFLA_NET_NS_PID])
2332 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
2333 else if (tb[IFLA_NET_NS_FD])
2334 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
2336 net = get_net(src_net);
2339 EXPORT_SYMBOL(rtnl_link_get_net);
2341 /* Figure out which network namespace we are talking about by
2342 * examining the link attributes in the following order:
2344 * 1. IFLA_NET_NS_PID
2346 * 3. IFLA_TARGET_NETNSID
2348 static struct net *rtnl_link_get_net_by_nlattr(struct net *src_net,
2349 struct nlattr *tb[])
2353 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD])
2354 return rtnl_link_get_net(src_net, tb);
2356 if (!tb[IFLA_TARGET_NETNSID])
2357 return get_net(src_net);
2359 net = get_net_ns_by_id(src_net, nla_get_u32(tb[IFLA_TARGET_NETNSID]));
2361 return ERR_PTR(-EINVAL);
2366 static struct net *rtnl_link_get_net_capable(const struct sk_buff *skb,
2367 struct net *src_net,
2368 struct nlattr *tb[], int cap)
2372 net = rtnl_link_get_net_by_nlattr(src_net, tb);
2376 if (!netlink_ns_capable(skb, net->user_ns, cap)) {
2378 return ERR_PTR(-EPERM);
2384 /* Verify that rtnetlink requests do not pass additional properties
2385 * potentially referring to different network namespaces.
2387 static int rtnl_ensure_unique_netns(struct nlattr *tb[],
2388 struct netlink_ext_ack *extack,
2392 if (netns_id_only) {
2393 if (!tb[IFLA_NET_NS_PID] && !tb[IFLA_NET_NS_FD])
2396 NL_SET_ERR_MSG(extack, "specified netns attribute not supported");
2400 if (tb[IFLA_TARGET_NETNSID] && (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]))
2403 if (tb[IFLA_NET_NS_PID] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_FD]))
2406 if (tb[IFLA_NET_NS_FD] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_PID]))
2412 NL_SET_ERR_MSG(extack, "multiple netns identifying attributes specified");
2416 static int rtnl_set_vf_rate(struct net_device *dev, int vf, int min_tx_rate,
2419 const struct net_device_ops *ops = dev->netdev_ops;
2421 if (!ops->ndo_set_vf_rate)
2423 if (max_tx_rate && max_tx_rate < min_tx_rate)
2426 return ops->ndo_set_vf_rate(dev, vf, min_tx_rate, max_tx_rate);
2429 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[],
2430 struct netlink_ext_ack *extack)
2432 if (tb[IFLA_ADDRESS] &&
2433 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
2436 if (tb[IFLA_BROADCAST] &&
2437 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
2440 if (tb[IFLA_GSO_MAX_SIZE] &&
2441 nla_get_u32(tb[IFLA_GSO_MAX_SIZE]) > dev->tso_max_size) {
2442 NL_SET_ERR_MSG(extack, "too big gso_max_size");
2446 if (tb[IFLA_GSO_MAX_SEGS] &&
2447 (nla_get_u32(tb[IFLA_GSO_MAX_SEGS]) > GSO_MAX_SEGS ||
2448 nla_get_u32(tb[IFLA_GSO_MAX_SEGS]) > dev->tso_max_segs)) {
2449 NL_SET_ERR_MSG(extack, "too big gso_max_segs");
2453 if (tb[IFLA_GRO_MAX_SIZE] &&
2454 nla_get_u32(tb[IFLA_GRO_MAX_SIZE]) > GRO_MAX_SIZE) {
2455 NL_SET_ERR_MSG(extack, "too big gro_max_size");
2459 if (tb[IFLA_GSO_IPV4_MAX_SIZE] &&
2460 nla_get_u32(tb[IFLA_GSO_IPV4_MAX_SIZE]) > dev->tso_max_size) {
2461 NL_SET_ERR_MSG(extack, "too big gso_ipv4_max_size");
2465 if (tb[IFLA_GRO_IPV4_MAX_SIZE] &&
2466 nla_get_u32(tb[IFLA_GRO_IPV4_MAX_SIZE]) > GRO_MAX_SIZE) {
2467 NL_SET_ERR_MSG(extack, "too big gro_ipv4_max_size");
2471 if (tb[IFLA_AF_SPEC]) {
2475 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2476 const struct rtnl_af_ops *af_ops;
2478 af_ops = rtnl_af_lookup(nla_type(af));
2480 return -EAFNOSUPPORT;
2482 if (!af_ops->set_link_af)
2485 if (af_ops->validate_link_af) {
2486 err = af_ops->validate_link_af(dev, af, extack);
2496 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
2499 const struct net_device_ops *ops = dev->netdev_ops;
2501 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
2504 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
2506 if (dev->type != ARPHRD_INFINIBAND)
2509 return handle_infiniband_guid(dev, ivt, guid_type);
2512 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
2514 const struct net_device_ops *ops = dev->netdev_ops;
2517 if (tb[IFLA_VF_MAC]) {
2518 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
2520 if (ivm->vf >= INT_MAX)
2523 if (ops->ndo_set_vf_mac)
2524 err = ops->ndo_set_vf_mac(dev, ivm->vf,
2530 if (tb[IFLA_VF_VLAN]) {
2531 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
2533 if (ivv->vf >= INT_MAX)
2536 if (ops->ndo_set_vf_vlan)
2537 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
2539 htons(ETH_P_8021Q));
2544 if (tb[IFLA_VF_VLAN_LIST]) {
2545 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
2546 struct nlattr *attr;
2550 if (!ops->ndo_set_vf_vlan)
2553 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
2554 if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
2555 nla_len(attr) < NLA_HDRLEN) {
2558 if (len >= MAX_VLAN_LIST_LEN)
2560 ivvl[len] = nla_data(attr);
2567 if (ivvl[0]->vf >= INT_MAX)
2569 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
2570 ivvl[0]->qos, ivvl[0]->vlan_proto);
2575 if (tb[IFLA_VF_TX_RATE]) {
2576 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
2577 struct ifla_vf_info ivf;
2579 if (ivt->vf >= INT_MAX)
2582 if (ops->ndo_get_vf_config)
2583 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
2587 err = rtnl_set_vf_rate(dev, ivt->vf,
2588 ivf.min_tx_rate, ivt->rate);
2593 if (tb[IFLA_VF_RATE]) {
2594 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
2596 if (ivt->vf >= INT_MAX)
2599 err = rtnl_set_vf_rate(dev, ivt->vf,
2600 ivt->min_tx_rate, ivt->max_tx_rate);
2605 if (tb[IFLA_VF_SPOOFCHK]) {
2606 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
2608 if (ivs->vf >= INT_MAX)
2611 if (ops->ndo_set_vf_spoofchk)
2612 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
2618 if (tb[IFLA_VF_LINK_STATE]) {
2619 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
2621 if (ivl->vf >= INT_MAX)
2624 if (ops->ndo_set_vf_link_state)
2625 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
2631 if (tb[IFLA_VF_RSS_QUERY_EN]) {
2632 struct ifla_vf_rss_query_en *ivrssq_en;
2635 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
2636 if (ivrssq_en->vf >= INT_MAX)
2638 if (ops->ndo_set_vf_rss_query_en)
2639 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
2640 ivrssq_en->setting);
2645 if (tb[IFLA_VF_TRUST]) {
2646 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
2648 if (ivt->vf >= INT_MAX)
2651 if (ops->ndo_set_vf_trust)
2652 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
2657 if (tb[IFLA_VF_IB_NODE_GUID]) {
2658 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
2660 if (ivt->vf >= INT_MAX)
2662 if (!ops->ndo_set_vf_guid)
2664 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
2667 if (tb[IFLA_VF_IB_PORT_GUID]) {
2668 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
2670 if (ivt->vf >= INT_MAX)
2672 if (!ops->ndo_set_vf_guid)
2675 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
2681 static int do_set_master(struct net_device *dev, int ifindex,
2682 struct netlink_ext_ack *extack)
2684 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
2685 const struct net_device_ops *ops;
2689 if (upper_dev->ifindex == ifindex)
2691 ops = upper_dev->netdev_ops;
2692 if (ops->ndo_del_slave) {
2693 err = ops->ndo_del_slave(upper_dev, dev);
2702 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
2705 ops = upper_dev->netdev_ops;
2706 if (ops->ndo_add_slave) {
2707 err = ops->ndo_add_slave(upper_dev, dev, extack);
2717 static const struct nla_policy ifla_proto_down_reason_policy[IFLA_PROTO_DOWN_REASON_VALUE + 1] = {
2718 [IFLA_PROTO_DOWN_REASON_MASK] = { .type = NLA_U32 },
2719 [IFLA_PROTO_DOWN_REASON_VALUE] = { .type = NLA_U32 },
2722 static int do_set_proto_down(struct net_device *dev,
2723 struct nlattr *nl_proto_down,
2724 struct nlattr *nl_proto_down_reason,
2725 struct netlink_ext_ack *extack)
2727 struct nlattr *pdreason[IFLA_PROTO_DOWN_REASON_MAX + 1];
2728 unsigned long mask = 0;
2733 if (!(dev->priv_flags & IFF_CHANGE_PROTO_DOWN)) {
2734 NL_SET_ERR_MSG(extack, "Protodown not supported by device");
2738 if (nl_proto_down_reason) {
2739 err = nla_parse_nested_deprecated(pdreason,
2740 IFLA_PROTO_DOWN_REASON_MAX,
2741 nl_proto_down_reason,
2742 ifla_proto_down_reason_policy,
2747 if (!pdreason[IFLA_PROTO_DOWN_REASON_VALUE]) {
2748 NL_SET_ERR_MSG(extack, "Invalid protodown reason value");
2752 value = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_VALUE]);
2754 if (pdreason[IFLA_PROTO_DOWN_REASON_MASK])
2755 mask = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_MASK]);
2757 dev_change_proto_down_reason(dev, mask, value);
2760 if (nl_proto_down) {
2761 proto_down = nla_get_u8(nl_proto_down);
2763 /* Don't turn off protodown if there are active reasons */
2764 if (!proto_down && dev->proto_down_reason) {
2765 NL_SET_ERR_MSG(extack, "Cannot clear protodown, active reasons");
2768 err = dev_change_proto_down(dev,
2777 #define DO_SETLINK_MODIFIED 0x01
2778 /* notify flag means notify + modified. */
2779 #define DO_SETLINK_NOTIFY 0x03
2780 static int do_setlink(const struct sk_buff *skb,
2781 struct net_device *dev, struct ifinfomsg *ifm,
2782 struct netlink_ext_ack *extack,
2783 struct nlattr **tb, int status)
2785 const struct net_device_ops *ops = dev->netdev_ops;
2786 char ifname[IFNAMSIZ];
2789 if (tb[IFLA_IFNAME])
2790 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2794 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD] || tb[IFLA_TARGET_NETNSID]) {
2795 const char *pat = ifname[0] ? ifname : NULL;
2799 net = rtnl_link_get_net_capable(skb, dev_net(dev),
2806 if (tb[IFLA_NEW_IFINDEX])
2807 new_ifindex = nla_get_s32(tb[IFLA_NEW_IFINDEX]);
2811 err = __dev_change_net_namespace(dev, net, pat, new_ifindex);
2815 status |= DO_SETLINK_MODIFIED;
2819 struct rtnl_link_ifmap *u_map;
2822 if (!ops->ndo_set_config) {
2827 if (!netif_device_present(dev)) {
2832 u_map = nla_data(tb[IFLA_MAP]);
2833 k_map.mem_start = (unsigned long) u_map->mem_start;
2834 k_map.mem_end = (unsigned long) u_map->mem_end;
2835 k_map.base_addr = (unsigned short) u_map->base_addr;
2836 k_map.irq = (unsigned char) u_map->irq;
2837 k_map.dma = (unsigned char) u_map->dma;
2838 k_map.port = (unsigned char) u_map->port;
2840 err = ops->ndo_set_config(dev, &k_map);
2844 status |= DO_SETLINK_NOTIFY;
2847 if (tb[IFLA_ADDRESS]) {
2848 struct sockaddr *sa;
2851 len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len,
2853 sa = kmalloc(len, GFP_KERNEL);
2858 sa->sa_family = dev->type;
2859 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
2861 err = dev_set_mac_address_user(dev, sa, extack);
2865 status |= DO_SETLINK_MODIFIED;
2869 err = dev_set_mtu_ext(dev, nla_get_u32(tb[IFLA_MTU]), extack);
2872 status |= DO_SETLINK_MODIFIED;
2875 if (tb[IFLA_GROUP]) {
2876 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2877 status |= DO_SETLINK_NOTIFY;
2881 * Interface selected by interface index but interface
2882 * name provided implies that a name change has been
2885 if (ifm->ifi_index > 0 && ifname[0]) {
2886 err = dev_change_name(dev, ifname);
2889 status |= DO_SETLINK_MODIFIED;
2892 if (tb[IFLA_IFALIAS]) {
2893 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2894 nla_len(tb[IFLA_IFALIAS]));
2897 status |= DO_SETLINK_NOTIFY;
2900 if (tb[IFLA_BROADCAST]) {
2901 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
2902 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
2905 if (ifm->ifi_flags || ifm->ifi_change) {
2906 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
2912 if (tb[IFLA_MASTER]) {
2913 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
2916 status |= DO_SETLINK_MODIFIED;
2919 if (tb[IFLA_CARRIER]) {
2920 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2923 status |= DO_SETLINK_MODIFIED;
2926 if (tb[IFLA_TXQLEN]) {
2927 unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]);
2929 err = dev_change_tx_queue_len(dev, value);
2932 status |= DO_SETLINK_MODIFIED;
2935 if (tb[IFLA_GSO_MAX_SIZE]) {
2936 u32 max_size = nla_get_u32(tb[IFLA_GSO_MAX_SIZE]);
2938 if (dev->gso_max_size ^ max_size) {
2939 netif_set_gso_max_size(dev, max_size);
2940 status |= DO_SETLINK_MODIFIED;
2944 if (tb[IFLA_GSO_MAX_SEGS]) {
2945 u32 max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
2947 if (dev->gso_max_segs ^ max_segs) {
2948 netif_set_gso_max_segs(dev, max_segs);
2949 status |= DO_SETLINK_MODIFIED;
2953 if (tb[IFLA_GRO_MAX_SIZE]) {
2954 u32 gro_max_size = nla_get_u32(tb[IFLA_GRO_MAX_SIZE]);
2956 if (dev->gro_max_size ^ gro_max_size) {
2957 netif_set_gro_max_size(dev, gro_max_size);
2958 status |= DO_SETLINK_MODIFIED;
2962 if (tb[IFLA_GSO_IPV4_MAX_SIZE]) {
2963 u32 max_size = nla_get_u32(tb[IFLA_GSO_IPV4_MAX_SIZE]);
2965 if (dev->gso_ipv4_max_size ^ max_size) {
2966 netif_set_gso_ipv4_max_size(dev, max_size);
2967 status |= DO_SETLINK_MODIFIED;
2971 if (tb[IFLA_GRO_IPV4_MAX_SIZE]) {
2972 u32 gro_max_size = nla_get_u32(tb[IFLA_GRO_IPV4_MAX_SIZE]);
2974 if (dev->gro_ipv4_max_size ^ gro_max_size) {
2975 netif_set_gro_ipv4_max_size(dev, gro_max_size);
2976 status |= DO_SETLINK_MODIFIED;
2980 if (tb[IFLA_OPERSTATE])
2981 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2983 if (tb[IFLA_LINKMODE]) {
2984 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2986 write_lock(&dev_base_lock);
2987 if (dev->link_mode ^ value)
2988 status |= DO_SETLINK_NOTIFY;
2989 dev->link_mode = value;
2990 write_unlock(&dev_base_lock);
2993 if (tb[IFLA_VFINFO_LIST]) {
2994 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
2995 struct nlattr *attr;
2998 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
2999 if (nla_type(attr) != IFLA_VF_INFO ||
3000 nla_len(attr) < NLA_HDRLEN) {
3004 err = nla_parse_nested_deprecated(vfinfo, IFLA_VF_MAX,
3010 err = do_setvfinfo(dev, vfinfo);
3013 status |= DO_SETLINK_NOTIFY;
3018 if (tb[IFLA_VF_PORTS]) {
3019 struct nlattr *port[IFLA_PORT_MAX+1];
3020 struct nlattr *attr;
3025 if (!ops->ndo_set_vf_port)
3028 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
3029 if (nla_type(attr) != IFLA_VF_PORT ||
3030 nla_len(attr) < NLA_HDRLEN) {
3034 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
3040 if (!port[IFLA_PORT_VF]) {
3044 vf = nla_get_u32(port[IFLA_PORT_VF]);
3045 err = ops->ndo_set_vf_port(dev, vf, port);
3048 status |= DO_SETLINK_NOTIFY;
3053 if (tb[IFLA_PORT_SELF]) {
3054 struct nlattr *port[IFLA_PORT_MAX+1];
3056 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
3058 ifla_port_policy, NULL);
3063 if (ops->ndo_set_vf_port)
3064 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
3067 status |= DO_SETLINK_NOTIFY;
3070 if (tb[IFLA_AF_SPEC]) {
3074 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
3075 const struct rtnl_af_ops *af_ops;
3077 BUG_ON(!(af_ops = rtnl_af_lookup(nla_type(af))));
3079 err = af_ops->set_link_af(dev, af, extack);
3083 status |= DO_SETLINK_NOTIFY;
3088 if (tb[IFLA_PROTO_DOWN] || tb[IFLA_PROTO_DOWN_REASON]) {
3089 err = do_set_proto_down(dev, tb[IFLA_PROTO_DOWN],
3090 tb[IFLA_PROTO_DOWN_REASON], extack);
3093 status |= DO_SETLINK_NOTIFY;
3097 struct nlattr *xdp[IFLA_XDP_MAX + 1];
3100 err = nla_parse_nested_deprecated(xdp, IFLA_XDP_MAX,
3102 ifla_xdp_policy, NULL);
3106 if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) {
3111 if (xdp[IFLA_XDP_FLAGS]) {
3112 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
3113 if (xdp_flags & ~XDP_FLAGS_MASK) {
3117 if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) {
3123 if (xdp[IFLA_XDP_FD]) {
3124 int expected_fd = -1;
3126 if (xdp_flags & XDP_FLAGS_REPLACE) {
3127 if (!xdp[IFLA_XDP_EXPECTED_FD]) {
3132 nla_get_s32(xdp[IFLA_XDP_EXPECTED_FD]);
3135 err = dev_change_xdp_fd(dev, extack,
3136 nla_get_s32(xdp[IFLA_XDP_FD]),
3141 status |= DO_SETLINK_NOTIFY;
3146 if (status & DO_SETLINK_MODIFIED) {
3147 if ((status & DO_SETLINK_NOTIFY) == DO_SETLINK_NOTIFY)
3148 netdev_state_change(dev);
3151 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",
3158 static struct net_device *rtnl_dev_get(struct net *net,
3159 struct nlattr *tb[])
3161 char ifname[ALTIFNAMSIZ];
3163 if (tb[IFLA_IFNAME])
3164 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3165 else if (tb[IFLA_ALT_IFNAME])
3166 nla_strscpy(ifname, tb[IFLA_ALT_IFNAME], ALTIFNAMSIZ);
3170 return __dev_get_by_name(net, ifname);
3173 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3174 struct netlink_ext_ack *extack)
3176 struct net *net = sock_net(skb->sk);
3177 struct ifinfomsg *ifm;
3178 struct net_device *dev;
3180 struct nlattr *tb[IFLA_MAX+1];
3182 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3183 ifla_policy, extack);
3187 err = rtnl_ensure_unique_netns(tb, extack, false);
3192 ifm = nlmsg_data(nlh);
3193 if (ifm->ifi_index > 0)
3194 dev = __dev_get_by_index(net, ifm->ifi_index);
3195 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3196 dev = rtnl_dev_get(net, tb);
3205 err = validate_linkmsg(dev, tb, extack);
3209 err = do_setlink(skb, dev, ifm, extack, tb, 0);
3214 static int rtnl_group_dellink(const struct net *net, int group)
3216 struct net_device *dev, *aux;
3217 LIST_HEAD(list_kill);
3223 for_each_netdev(net, dev) {
3224 if (dev->group == group) {
3225 const struct rtnl_link_ops *ops;
3228 ops = dev->rtnl_link_ops;
3229 if (!ops || !ops->dellink)
3237 for_each_netdev_safe(net, dev, aux) {
3238 if (dev->group == group) {
3239 const struct rtnl_link_ops *ops;
3241 ops = dev->rtnl_link_ops;
3242 ops->dellink(dev, &list_kill);
3245 unregister_netdevice_many(&list_kill);
3250 int rtnl_delete_link(struct net_device *dev, u32 portid, const struct nlmsghdr *nlh)
3252 const struct rtnl_link_ops *ops;
3253 LIST_HEAD(list_kill);
3255 ops = dev->rtnl_link_ops;
3256 if (!ops || !ops->dellink)
3259 ops->dellink(dev, &list_kill);
3260 unregister_netdevice_many_notify(&list_kill, portid, nlh);
3264 EXPORT_SYMBOL_GPL(rtnl_delete_link);
3266 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
3267 struct netlink_ext_ack *extack)
3269 struct net *net = sock_net(skb->sk);
3270 u32 portid = NETLINK_CB(skb).portid;
3271 struct net *tgt_net = net;
3272 struct net_device *dev = NULL;
3273 struct ifinfomsg *ifm;
3274 struct nlattr *tb[IFLA_MAX+1];
3278 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3279 ifla_policy, extack);
3283 err = rtnl_ensure_unique_netns(tb, extack, true);
3287 if (tb[IFLA_TARGET_NETNSID]) {
3288 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
3289 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
3290 if (IS_ERR(tgt_net))
3291 return PTR_ERR(tgt_net);
3295 ifm = nlmsg_data(nlh);
3296 if (ifm->ifi_index > 0)
3297 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
3298 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3299 dev = rtnl_dev_get(net, tb);
3300 else if (tb[IFLA_GROUP])
3301 err = rtnl_group_dellink(tgt_net, nla_get_u32(tb[IFLA_GROUP]));
3306 if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME] || ifm->ifi_index > 0)
3312 err = rtnl_delete_link(dev, portid, nlh);
3321 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm,
3322 u32 portid, const struct nlmsghdr *nlh)
3324 unsigned int old_flags;
3327 old_flags = dev->flags;
3328 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
3329 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
3335 if (dev->rtnl_link_state == RTNL_LINK_INITIALIZED) {
3336 __dev_notify_flags(dev, old_flags, (old_flags ^ dev->flags), portid, nlh);
3338 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3339 __dev_notify_flags(dev, old_flags, ~0U, portid, nlh);
3343 EXPORT_SYMBOL(rtnl_configure_link);
3345 struct net_device *rtnl_create_link(struct net *net, const char *ifname,
3346 unsigned char name_assign_type,
3347 const struct rtnl_link_ops *ops,
3348 struct nlattr *tb[],
3349 struct netlink_ext_ack *extack)
3351 struct net_device *dev;
3352 unsigned int num_tx_queues = 1;
3353 unsigned int num_rx_queues = 1;
3356 if (tb[IFLA_NUM_TX_QUEUES])
3357 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
3358 else if (ops->get_num_tx_queues)
3359 num_tx_queues = ops->get_num_tx_queues();
3361 if (tb[IFLA_NUM_RX_QUEUES])
3362 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
3363 else if (ops->get_num_rx_queues)
3364 num_rx_queues = ops->get_num_rx_queues();
3366 if (num_tx_queues < 1 || num_tx_queues > 4096) {
3367 NL_SET_ERR_MSG(extack, "Invalid number of transmit queues");
3368 return ERR_PTR(-EINVAL);
3371 if (num_rx_queues < 1 || num_rx_queues > 4096) {
3372 NL_SET_ERR_MSG(extack, "Invalid number of receive queues");
3373 return ERR_PTR(-EINVAL);
3377 dev = ops->alloc(tb, ifname, name_assign_type,
3378 num_tx_queues, num_rx_queues);
3382 dev = alloc_netdev_mqs(ops->priv_size, ifname,
3383 name_assign_type, ops->setup,
3384 num_tx_queues, num_rx_queues);
3388 return ERR_PTR(-ENOMEM);
3390 err = validate_linkmsg(dev, tb, extack);
3393 return ERR_PTR(err);
3396 dev_net_set(dev, net);
3397 dev->rtnl_link_ops = ops;
3398 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
3401 u32 mtu = nla_get_u32(tb[IFLA_MTU]);
3403 err = dev_validate_mtu(dev, mtu, extack);
3406 return ERR_PTR(err);
3410 if (tb[IFLA_ADDRESS]) {
3411 __dev_addr_set(dev, nla_data(tb[IFLA_ADDRESS]),
3412 nla_len(tb[IFLA_ADDRESS]));
3413 dev->addr_assign_type = NET_ADDR_SET;
3415 if (tb[IFLA_BROADCAST])
3416 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
3417 nla_len(tb[IFLA_BROADCAST]));
3418 if (tb[IFLA_TXQLEN])
3419 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
3420 if (tb[IFLA_OPERSTATE])
3421 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
3422 if (tb[IFLA_LINKMODE])
3423 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
3425 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
3426 if (tb[IFLA_GSO_MAX_SIZE])
3427 netif_set_gso_max_size(dev, nla_get_u32(tb[IFLA_GSO_MAX_SIZE]));
3428 if (tb[IFLA_GSO_MAX_SEGS])
3429 netif_set_gso_max_segs(dev, nla_get_u32(tb[IFLA_GSO_MAX_SEGS]));
3430 if (tb[IFLA_GRO_MAX_SIZE])
3431 netif_set_gro_max_size(dev, nla_get_u32(tb[IFLA_GRO_MAX_SIZE]));
3432 if (tb[IFLA_GSO_IPV4_MAX_SIZE])
3433 netif_set_gso_ipv4_max_size(dev, nla_get_u32(tb[IFLA_GSO_IPV4_MAX_SIZE]));
3434 if (tb[IFLA_GRO_IPV4_MAX_SIZE])
3435 netif_set_gro_ipv4_max_size(dev, nla_get_u32(tb[IFLA_GRO_IPV4_MAX_SIZE]));
3439 EXPORT_SYMBOL(rtnl_create_link);
3441 static int rtnl_group_changelink(const struct sk_buff *skb,
3442 struct net *net, int group,
3443 struct ifinfomsg *ifm,
3444 struct netlink_ext_ack *extack,
3447 struct net_device *dev, *aux;
3450 for_each_netdev_safe(net, dev, aux) {
3451 if (dev->group == group) {
3452 err = validate_linkmsg(dev, tb, extack);
3455 err = do_setlink(skb, dev, ifm, extack, tb, 0);
3464 static int rtnl_newlink_create(struct sk_buff *skb, struct ifinfomsg *ifm,
3465 const struct rtnl_link_ops *ops,
3466 const struct nlmsghdr *nlh,
3467 struct nlattr **tb, struct nlattr **data,
3468 struct netlink_ext_ack *extack)
3470 unsigned char name_assign_type = NET_NAME_USER;
3471 struct net *net = sock_net(skb->sk);
3472 u32 portid = NETLINK_CB(skb).portid;
3473 struct net *dest_net, *link_net;
3474 struct net_device *dev;
3475 char ifname[IFNAMSIZ];
3478 if (!ops->alloc && !ops->setup)
3481 if (tb[IFLA_IFNAME]) {
3482 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3484 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
3485 name_assign_type = NET_NAME_ENUM;
3488 dest_net = rtnl_link_get_net_capable(skb, net, tb, CAP_NET_ADMIN);
3489 if (IS_ERR(dest_net))
3490 return PTR_ERR(dest_net);
3492 if (tb[IFLA_LINK_NETNSID]) {
3493 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
3495 link_net = get_net_ns_by_id(dest_net, id);
3497 NL_SET_ERR_MSG(extack, "Unknown network namespace id");
3502 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
3508 dev = rtnl_create_link(link_net ? : dest_net, ifname,
3509 name_assign_type, ops, tb, extack);
3515 dev->ifindex = ifm->ifi_index;
3518 err = ops->newlink(link_net ? : net, dev, tb, data, extack);
3520 err = register_netdevice(dev);
3526 err = rtnl_configure_link(dev, ifm, portid, nlh);
3528 goto out_unregister;
3530 err = dev_change_net_namespace(dev, dest_net, ifname);
3532 goto out_unregister;
3534 if (tb[IFLA_MASTER]) {
3535 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
3537 goto out_unregister;
3546 LIST_HEAD(list_kill);
3548 ops->dellink(dev, &list_kill);
3549 unregister_netdevice_many(&list_kill);
3551 unregister_netdevice(dev);
3556 struct rtnl_newlink_tbs {
3557 struct nlattr *tb[IFLA_MAX + 1];
3558 struct nlattr *attr[RTNL_MAX_TYPE + 1];
3559 struct nlattr *slave_attr[RTNL_SLAVE_MAX_TYPE + 1];
3562 static int __rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3563 struct rtnl_newlink_tbs *tbs,
3564 struct netlink_ext_ack *extack)
3566 struct nlattr *linkinfo[IFLA_INFO_MAX + 1];
3567 struct nlattr ** const tb = tbs->tb;
3568 const struct rtnl_link_ops *m_ops;
3569 struct net_device *master_dev;
3570 struct net *net = sock_net(skb->sk);
3571 const struct rtnl_link_ops *ops;
3572 struct nlattr **slave_data;
3573 char kind[MODULE_NAME_LEN];
3574 struct net_device *dev;
3575 struct ifinfomsg *ifm;
3576 struct nlattr **data;
3577 bool link_specified;
3580 #ifdef CONFIG_MODULES
3583 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3584 ifla_policy, extack);
3588 err = rtnl_ensure_unique_netns(tb, extack, false);
3592 ifm = nlmsg_data(nlh);
3593 if (ifm->ifi_index > 0) {
3594 link_specified = true;
3595 dev = __dev_get_by_index(net, ifm->ifi_index);
3596 } else if (ifm->ifi_index < 0) {
3597 NL_SET_ERR_MSG(extack, "ifindex can't be negative");
3599 } else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) {
3600 link_specified = true;
3601 dev = rtnl_dev_get(net, tb);
3603 link_specified = false;
3610 master_dev = netdev_master_upper_dev_get(dev);
3612 m_ops = master_dev->rtnl_link_ops;
3615 if (tb[IFLA_LINKINFO]) {
3616 err = nla_parse_nested_deprecated(linkinfo, IFLA_INFO_MAX,
3618 ifla_info_policy, NULL);
3622 memset(linkinfo, 0, sizeof(linkinfo));
3624 if (linkinfo[IFLA_INFO_KIND]) {
3625 nla_strscpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
3626 ops = rtnl_link_ops_get(kind);
3634 if (ops->maxtype > RTNL_MAX_TYPE)
3637 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
3638 err = nla_parse_nested_deprecated(tbs->attr, ops->maxtype,
3639 linkinfo[IFLA_INFO_DATA],
3640 ops->policy, extack);
3645 if (ops->validate) {
3646 err = ops->validate(tb, data, extack);
3654 if (m_ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE)
3657 if (m_ops->slave_maxtype &&
3658 linkinfo[IFLA_INFO_SLAVE_DATA]) {
3659 err = nla_parse_nested_deprecated(tbs->slave_attr,
3660 m_ops->slave_maxtype,
3661 linkinfo[IFLA_INFO_SLAVE_DATA],
3662 m_ops->slave_policy,
3666 slave_data = tbs->slave_attr;
3673 if (nlh->nlmsg_flags & NLM_F_EXCL)
3675 if (nlh->nlmsg_flags & NLM_F_REPLACE)
3678 err = validate_linkmsg(dev, tb, extack);
3682 if (linkinfo[IFLA_INFO_DATA]) {
3683 if (!ops || ops != dev->rtnl_link_ops ||
3687 err = ops->changelink(dev, tb, data, extack);
3690 status |= DO_SETLINK_NOTIFY;
3693 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
3694 if (!m_ops || !m_ops->slave_changelink)
3697 err = m_ops->slave_changelink(master_dev, dev, tb,
3698 slave_data, extack);
3701 status |= DO_SETLINK_NOTIFY;
3704 return do_setlink(skb, dev, ifm, extack, tb, status);
3707 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
3708 /* No dev found and NLM_F_CREATE not set. Requested dev does not exist,
3709 * or it's for a group
3714 return rtnl_group_changelink(skb, net,
3715 nla_get_u32(tb[IFLA_GROUP]),
3720 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
3724 #ifdef CONFIG_MODULES
3727 request_module("rtnl-link-%s", kind);
3729 ops = rtnl_link_ops_get(kind);
3734 NL_SET_ERR_MSG(extack, "Unknown device type");
3738 return rtnl_newlink_create(skb, ifm, ops, nlh, tb, data, extack);
3741 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3742 struct netlink_ext_ack *extack)
3744 struct rtnl_newlink_tbs *tbs;
3747 tbs = kmalloc(sizeof(*tbs), GFP_KERNEL);
3751 ret = __rtnl_newlink(skb, nlh, tbs, extack);
3756 static int rtnl_valid_getlink_req(struct sk_buff *skb,
3757 const struct nlmsghdr *nlh,
3759 struct netlink_ext_ack *extack)
3761 struct ifinfomsg *ifm;
3764 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
3765 NL_SET_ERR_MSG(extack, "Invalid header for get link");
3769 if (!netlink_strict_get_check(skb))
3770 return nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3771 ifla_policy, extack);
3773 ifm = nlmsg_data(nlh);
3774 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
3776 NL_SET_ERR_MSG(extack, "Invalid values in header for get link request");
3780 err = nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, IFLA_MAX,
3781 ifla_policy, extack);
3785 for (i = 0; i <= IFLA_MAX; i++) {
3791 case IFLA_ALT_IFNAME:
3793 case IFLA_TARGET_NETNSID:
3796 NL_SET_ERR_MSG(extack, "Unsupported attribute in get link request");
3804 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3805 struct netlink_ext_ack *extack)
3807 struct net *net = sock_net(skb->sk);
3808 struct net *tgt_net = net;
3809 struct ifinfomsg *ifm;
3810 struct nlattr *tb[IFLA_MAX+1];
3811 struct net_device *dev = NULL;
3812 struct sk_buff *nskb;
3815 u32 ext_filter_mask = 0;
3817 err = rtnl_valid_getlink_req(skb, nlh, tb, extack);
3821 err = rtnl_ensure_unique_netns(tb, extack, true);
3825 if (tb[IFLA_TARGET_NETNSID]) {
3826 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
3827 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
3828 if (IS_ERR(tgt_net))
3829 return PTR_ERR(tgt_net);
3832 if (tb[IFLA_EXT_MASK])
3833 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3836 ifm = nlmsg_data(nlh);
3837 if (ifm->ifi_index > 0)
3838 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
3839 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3840 dev = rtnl_dev_get(tgt_net, tb);
3849 nskb = nlmsg_new_large(if_nlmsg_size(dev, ext_filter_mask));
3853 /* Synchronize the carrier state so we don't report a state
3854 * that we're not actually going to honour immediately; if
3855 * the driver just did a carrier off->on transition, we can
3856 * only TX if link watch work has run, but without this we'd
3857 * already report carrier on, even if it doesn't work yet.
3859 linkwatch_sync_dev(dev);
3861 err = rtnl_fill_ifinfo(nskb, dev, net,
3862 RTM_NEWLINK, NETLINK_CB(skb).portid,
3863 nlh->nlmsg_seq, 0, 0, ext_filter_mask,
3864 0, NULL, 0, netnsid, GFP_KERNEL);
3866 /* -EMSGSIZE implies BUG in if_nlmsg_size */
3867 WARN_ON(err == -EMSGSIZE);
3870 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
3878 static int rtnl_alt_ifname(int cmd, struct net_device *dev, struct nlattr *attr,
3879 bool *changed, struct netlink_ext_ack *extack)
3885 err = nla_validate(attr, attr->nla_len, IFLA_MAX, ifla_policy, extack);
3889 if (cmd == RTM_NEWLINKPROP) {
3890 size = rtnl_prop_list_size(dev);
3891 size += nla_total_size(ALTIFNAMSIZ);
3892 if (size >= U16_MAX) {
3893 NL_SET_ERR_MSG(extack,
3894 "effective property list too long");
3899 alt_ifname = nla_strdup(attr, GFP_KERNEL_ACCOUNT);
3903 if (cmd == RTM_NEWLINKPROP) {
3904 err = netdev_name_node_alt_create(dev, alt_ifname);
3907 } else if (cmd == RTM_DELLINKPROP) {
3908 err = netdev_name_node_alt_destroy(dev, alt_ifname);
3920 static int rtnl_linkprop(int cmd, struct sk_buff *skb, struct nlmsghdr *nlh,
3921 struct netlink_ext_ack *extack)
3923 struct net *net = sock_net(skb->sk);
3924 struct nlattr *tb[IFLA_MAX + 1];
3925 struct net_device *dev;
3926 struct ifinfomsg *ifm;
3927 bool changed = false;
3928 struct nlattr *attr;
3931 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
3935 err = rtnl_ensure_unique_netns(tb, extack, true);
3939 ifm = nlmsg_data(nlh);
3940 if (ifm->ifi_index > 0)
3941 dev = __dev_get_by_index(net, ifm->ifi_index);
3942 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3943 dev = rtnl_dev_get(net, tb);
3950 if (!tb[IFLA_PROP_LIST])
3953 nla_for_each_nested(attr, tb[IFLA_PROP_LIST], rem) {
3954 switch (nla_type(attr)) {
3955 case IFLA_ALT_IFNAME:
3956 err = rtnl_alt_ifname(cmd, dev, attr, &changed, extack);
3964 netdev_state_change(dev);
3968 static int rtnl_newlinkprop(struct sk_buff *skb, struct nlmsghdr *nlh,
3969 struct netlink_ext_ack *extack)
3971 return rtnl_linkprop(RTM_NEWLINKPROP, skb, nlh, extack);
3974 static int rtnl_dellinkprop(struct sk_buff *skb, struct nlmsghdr *nlh,
3975 struct netlink_ext_ack *extack)
3977 return rtnl_linkprop(RTM_DELLINKPROP, skb, nlh, extack);
3980 static u32 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
3982 struct net *net = sock_net(skb->sk);
3983 size_t min_ifinfo_dump_size = 0;
3984 struct nlattr *tb[IFLA_MAX+1];
3985 u32 ext_filter_mask = 0;
3986 struct net_device *dev;
3989 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
3990 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
3991 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
3993 if (nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
3994 if (tb[IFLA_EXT_MASK])
3995 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3998 if (!ext_filter_mask)
3999 return NLMSG_GOODSIZE;
4001 * traverse the list of net devices and compute the minimum
4002 * buffer size based upon the filter mask.
4005 for_each_netdev_rcu(net, dev) {
4006 min_ifinfo_dump_size = max(min_ifinfo_dump_size,
4007 if_nlmsg_size(dev, ext_filter_mask));
4011 return nlmsg_total_size(min_ifinfo_dump_size);
4014 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
4017 int s_idx = cb->family;
4018 int type = cb->nlh->nlmsg_type - RTM_BASE;
4024 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
4025 struct rtnl_link __rcu **tab;
4026 struct rtnl_link *link;
4027 rtnl_dumpit_func dumpit;
4029 if (idx < s_idx || idx == PF_PACKET)
4032 if (type < 0 || type >= RTM_NR_MSGTYPES)
4035 tab = rcu_dereference_rtnl(rtnl_msg_handlers[idx]);
4039 link = rcu_dereference_rtnl(tab[type]);
4043 dumpit = link->dumpit;
4048 memset(&cb->args[0], 0, sizeof(cb->args));
4052 ret = dumpit(skb, cb);
4058 return skb->len ? : ret;
4061 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
4062 unsigned int change,
4063 u32 event, gfp_t flags, int *new_nsid,
4064 int new_ifindex, u32 portid,
4065 const struct nlmsghdr *nlh)
4067 struct net *net = dev_net(dev);
4068 struct sk_buff *skb;
4072 skb = nlmsg_new(if_nlmsg_size(dev, 0), flags);
4076 if (nlmsg_report(nlh))
4077 seq = nlmsg_seq(nlh);
4081 err = rtnl_fill_ifinfo(skb, dev, dev_net(dev),
4082 type, portid, seq, change, 0, 0, event,
4083 new_nsid, new_ifindex, -1, flags);
4085 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
4086 WARN_ON(err == -EMSGSIZE);
4093 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
4097 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags,
4098 u32 portid, const struct nlmsghdr *nlh)
4100 struct net *net = dev_net(dev);
4102 rtnl_notify(skb, net, portid, RTNLGRP_LINK, nlh, flags);
4105 static void rtmsg_ifinfo_event(int type, struct net_device *dev,
4106 unsigned int change, u32 event,
4107 gfp_t flags, int *new_nsid, int new_ifindex,
4108 u32 portid, const struct nlmsghdr *nlh)
4110 struct sk_buff *skb;
4112 if (dev->reg_state != NETREG_REGISTERED)
4115 skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags, new_nsid,
4116 new_ifindex, portid, nlh);
4118 rtmsg_ifinfo_send(skb, dev, flags, portid, nlh);
4121 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
4122 gfp_t flags, u32 portid, const struct nlmsghdr *nlh)
4124 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
4125 NULL, 0, portid, nlh);
4128 void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change,
4129 gfp_t flags, int *new_nsid, int new_ifindex)
4131 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
4132 new_nsid, new_ifindex, 0, NULL);
4135 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
4136 struct net_device *dev,
4137 u8 *addr, u16 vid, u32 pid, u32 seq,
4138 int type, unsigned int flags,
4139 int nlflags, u16 ndm_state)
4141 struct nlmsghdr *nlh;
4144 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
4148 ndm = nlmsg_data(nlh);
4149 ndm->ndm_family = AF_BRIDGE;
4152 ndm->ndm_flags = flags;
4154 ndm->ndm_ifindex = dev->ifindex;
4155 ndm->ndm_state = ndm_state;
4157 if (nla_put(skb, NDA_LLADDR, dev->addr_len, addr))
4158 goto nla_put_failure;
4160 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
4161 goto nla_put_failure;
4163 nlmsg_end(skb, nlh);
4167 nlmsg_cancel(skb, nlh);
4171 static inline size_t rtnl_fdb_nlmsg_size(const struct net_device *dev)
4173 return NLMSG_ALIGN(sizeof(struct ndmsg)) +
4174 nla_total_size(dev->addr_len) + /* NDA_LLADDR */
4175 nla_total_size(sizeof(u16)) + /* NDA_VLAN */
4179 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
4182 struct net *net = dev_net(dev);
4183 struct sk_buff *skb;
4186 skb = nlmsg_new(rtnl_fdb_nlmsg_size(dev), GFP_ATOMIC);
4190 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
4191 0, 0, type, NTF_SELF, 0, ndm_state);
4197 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
4200 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
4204 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
4206 int ndo_dflt_fdb_add(struct ndmsg *ndm,
4207 struct nlattr *tb[],
4208 struct net_device *dev,
4209 const unsigned char *addr, u16 vid,
4214 /* If aging addresses are supported device will need to
4215 * implement its own handler for this.
4217 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
4218 netdev_info(dev, "default FDB implementation only supports local addresses\n");
4222 if (tb[NDA_FLAGS_EXT]) {
4223 netdev_info(dev, "invalid flags given to default FDB implementation\n");
4228 netdev_info(dev, "vlans aren't supported yet for dev_uc|mc_add()\n");
4232 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
4233 err = dev_uc_add_excl(dev, addr);
4234 else if (is_multicast_ether_addr(addr))
4235 err = dev_mc_add_excl(dev, addr);
4237 /* Only return duplicate errors if NLM_F_EXCL is set */
4238 if (err == -EEXIST && !(flags & NLM_F_EXCL))
4243 EXPORT_SYMBOL(ndo_dflt_fdb_add);
4245 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid,
4246 struct netlink_ext_ack *extack)
4251 if (nla_len(vlan_attr) != sizeof(u16)) {
4252 NL_SET_ERR_MSG(extack, "invalid vlan attribute size");
4256 vid = nla_get_u16(vlan_attr);
4258 if (!vid || vid >= VLAN_VID_MASK) {
4259 NL_SET_ERR_MSG(extack, "invalid vlan id");
4267 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
4268 struct netlink_ext_ack *extack)
4270 struct net *net = sock_net(skb->sk);
4272 struct nlattr *tb[NDA_MAX+1];
4273 struct net_device *dev;
4278 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL,
4283 ndm = nlmsg_data(nlh);
4284 if (ndm->ndm_ifindex == 0) {
4285 NL_SET_ERR_MSG(extack, "invalid ifindex");
4289 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
4291 NL_SET_ERR_MSG(extack, "unknown ifindex");
4295 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
4296 NL_SET_ERR_MSG(extack, "invalid address");
4300 if (dev->type != ARPHRD_ETHER) {
4301 NL_SET_ERR_MSG(extack, "FDB add only supported for Ethernet devices");
4305 addr = nla_data(tb[NDA_LLADDR]);
4307 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
4313 /* Support fdb on master device the net/bridge default case */
4314 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
4315 netif_is_bridge_port(dev)) {
4316 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4317 const struct net_device_ops *ops = br_dev->netdev_ops;
4319 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
4320 nlh->nlmsg_flags, extack);
4324 ndm->ndm_flags &= ~NTF_MASTER;
4327 /* Embedded bridge, macvlan, and any other device support */
4328 if ((ndm->ndm_flags & NTF_SELF)) {
4329 if (dev->netdev_ops->ndo_fdb_add)
4330 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
4335 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
4339 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
4341 ndm->ndm_flags &= ~NTF_SELF;
4349 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
4351 int ndo_dflt_fdb_del(struct ndmsg *ndm,
4352 struct nlattr *tb[],
4353 struct net_device *dev,
4354 const unsigned char *addr, u16 vid)
4358 /* If aging addresses are supported device will need to
4359 * implement its own handler for this.
4361 if (!(ndm->ndm_state & NUD_PERMANENT)) {
4362 netdev_info(dev, "default FDB implementation only supports local addresses\n");
4366 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
4367 err = dev_uc_del(dev, addr);
4368 else if (is_multicast_ether_addr(addr))
4369 err = dev_mc_del(dev, addr);
4373 EXPORT_SYMBOL(ndo_dflt_fdb_del);
4375 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
4376 struct netlink_ext_ack *extack)
4378 bool del_bulk = !!(nlh->nlmsg_flags & NLM_F_BULK);
4379 struct net *net = sock_net(skb->sk);
4380 const struct net_device_ops *ops;
4382 struct nlattr *tb[NDA_MAX+1];
4383 struct net_device *dev;
4388 if (!netlink_capable(skb, CAP_NET_ADMIN))
4392 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX,
4395 /* For bulk delete, the drivers will parse the message with
4398 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
4403 ndm = nlmsg_data(nlh);
4404 if (ndm->ndm_ifindex == 0) {
4405 NL_SET_ERR_MSG(extack, "invalid ifindex");
4409 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
4411 NL_SET_ERR_MSG(extack, "unknown ifindex");
4416 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
4417 NL_SET_ERR_MSG(extack, "invalid address");
4420 addr = nla_data(tb[NDA_LLADDR]);
4422 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
4427 if (dev->type != ARPHRD_ETHER) {
4428 NL_SET_ERR_MSG(extack, "FDB delete only supported for Ethernet devices");
4434 /* Support fdb on master device the net/bridge default case */
4435 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
4436 netif_is_bridge_port(dev)) {
4437 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4439 ops = br_dev->netdev_ops;
4441 if (ops->ndo_fdb_del)
4442 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid, extack);
4444 if (ops->ndo_fdb_del_bulk)
4445 err = ops->ndo_fdb_del_bulk(nlh, dev, extack);
4451 ndm->ndm_flags &= ~NTF_MASTER;
4454 /* Embedded bridge, macvlan, and any other device support */
4455 if (ndm->ndm_flags & NTF_SELF) {
4456 ops = dev->netdev_ops;
4458 if (ops->ndo_fdb_del)
4459 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid, extack);
4461 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
4463 /* in case err was cleared by NTF_MASTER call */
4465 if (ops->ndo_fdb_del_bulk)
4466 err = ops->ndo_fdb_del_bulk(nlh, dev, extack);
4471 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
4473 ndm->ndm_flags &= ~NTF_SELF;
4480 static int nlmsg_populate_fdb(struct sk_buff *skb,
4481 struct netlink_callback *cb,
4482 struct net_device *dev,
4484 struct netdev_hw_addr_list *list)
4486 struct netdev_hw_addr *ha;
4490 portid = NETLINK_CB(cb->skb).portid;
4491 seq = cb->nlh->nlmsg_seq;
4493 list_for_each_entry(ha, &list->list, list) {
4494 if (*idx < cb->args[2])
4497 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
4499 RTM_NEWNEIGH, NTF_SELF,
4500 NLM_F_MULTI, NUD_PERMANENT);
4510 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
4511 * @skb: socket buffer to store message in
4512 * @cb: netlink callback
4514 * @filter_dev: ignored
4515 * @idx: the number of FDB table entries dumped is added to *@idx
4517 * Default netdevice operation to dump the existing unicast address list.
4518 * Returns number of addresses from list put in skb.
4520 int ndo_dflt_fdb_dump(struct sk_buff *skb,
4521 struct netlink_callback *cb,
4522 struct net_device *dev,
4523 struct net_device *filter_dev,
4528 if (dev->type != ARPHRD_ETHER)
4531 netif_addr_lock_bh(dev);
4532 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
4535 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
4537 netif_addr_unlock_bh(dev);
4540 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
4542 static int valid_fdb_dump_strict(const struct nlmsghdr *nlh,
4543 int *br_idx, int *brport_idx,
4544 struct netlink_ext_ack *extack)
4546 struct nlattr *tb[NDA_MAX + 1];
4550 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
4551 NL_SET_ERR_MSG(extack, "Invalid header for fdb dump request");
4555 ndm = nlmsg_data(nlh);
4556 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state ||
4557 ndm->ndm_flags || ndm->ndm_type) {
4558 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb dump request");
4562 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
4563 NDA_MAX, NULL, extack);
4567 *brport_idx = ndm->ndm_ifindex;
4568 for (i = 0; i <= NDA_MAX; ++i) {
4574 if (nla_len(tb[i]) != sizeof(u32)) {
4575 NL_SET_ERR_MSG(extack, "Invalid IFINDEX attribute in fdb dump request");
4578 *brport_idx = nla_get_u32(tb[NDA_IFINDEX]);
4581 if (nla_len(tb[i]) != sizeof(u32)) {
4582 NL_SET_ERR_MSG(extack, "Invalid MASTER attribute in fdb dump request");
4585 *br_idx = nla_get_u32(tb[NDA_MASTER]);
4588 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb dump request");
4596 static int valid_fdb_dump_legacy(const struct nlmsghdr *nlh,
4597 int *br_idx, int *brport_idx,
4598 struct netlink_ext_ack *extack)
4600 struct nlattr *tb[IFLA_MAX+1];
4603 /* A hack to preserve kernel<->userspace interface.
4604 * Before Linux v4.12 this code accepted ndmsg since iproute2 v3.3.0.
4605 * However, ndmsg is shorter than ifinfomsg thus nlmsg_parse() bails.
4606 * So, check for ndmsg with an optional u32 attribute (not used here).
4607 * Fortunately these sizes don't conflict with the size of ifinfomsg
4608 * with an optional attribute.
4610 if (nlmsg_len(nlh) != sizeof(struct ndmsg) &&
4611 (nlmsg_len(nlh) != sizeof(struct ndmsg) +
4612 nla_attr_size(sizeof(u32)))) {
4613 struct ifinfomsg *ifm;
4615 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
4616 tb, IFLA_MAX, ifla_policy,
4620 } else if (err == 0) {
4621 if (tb[IFLA_MASTER])
4622 *br_idx = nla_get_u32(tb[IFLA_MASTER]);
4625 ifm = nlmsg_data(nlh);
4626 *brport_idx = ifm->ifi_index;
4631 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
4633 struct net_device *dev;
4634 struct net_device *br_dev = NULL;
4635 const struct net_device_ops *ops = NULL;
4636 const struct net_device_ops *cops = NULL;
4637 struct net *net = sock_net(skb->sk);
4638 struct hlist_head *head;
4646 if (cb->strict_check)
4647 err = valid_fdb_dump_strict(cb->nlh, &br_idx, &brport_idx,
4650 err = valid_fdb_dump_legacy(cb->nlh, &br_idx, &brport_idx,
4656 br_dev = __dev_get_by_index(net, br_idx);
4660 ops = br_dev->netdev_ops;
4664 s_idx = cb->args[1];
4666 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4668 head = &net->dev_index_head[h];
4669 hlist_for_each_entry(dev, head, index_hlist) {
4671 if (brport_idx && (dev->ifindex != brport_idx))
4674 if (!br_idx) { /* user did not specify a specific bridge */
4675 if (netif_is_bridge_port(dev)) {
4676 br_dev = netdev_master_upper_dev_get(dev);
4677 cops = br_dev->netdev_ops;
4680 if (dev != br_dev &&
4681 !netif_is_bridge_port(dev))
4684 if (br_dev != netdev_master_upper_dev_get(dev) &&
4685 !netif_is_bridge_master(dev))
4693 if (netif_is_bridge_port(dev)) {
4694 if (cops && cops->ndo_fdb_dump) {
4695 err = cops->ndo_fdb_dump(skb, cb,
4698 if (err == -EMSGSIZE)
4703 if (dev->netdev_ops->ndo_fdb_dump)
4704 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
4708 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
4710 if (err == -EMSGSIZE)
4715 /* reset fdb offset to 0 for rest of the interfaces */
4731 static int valid_fdb_get_strict(const struct nlmsghdr *nlh,
4732 struct nlattr **tb, u8 *ndm_flags,
4733 int *br_idx, int *brport_idx, u8 **addr,
4734 u16 *vid, struct netlink_ext_ack *extack)
4739 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
4740 NL_SET_ERR_MSG(extack, "Invalid header for fdb get request");
4744 ndm = nlmsg_data(nlh);
4745 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state ||
4747 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb get request");
4751 if (ndm->ndm_flags & ~(NTF_MASTER | NTF_SELF)) {
4752 NL_SET_ERR_MSG(extack, "Invalid flags in header for fdb get request");
4756 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
4757 NDA_MAX, nda_policy, extack);
4761 *ndm_flags = ndm->ndm_flags;
4762 *brport_idx = ndm->ndm_ifindex;
4763 for (i = 0; i <= NDA_MAX; ++i) {
4769 *br_idx = nla_get_u32(tb[i]);
4772 if (nla_len(tb[i]) != ETH_ALEN) {
4773 NL_SET_ERR_MSG(extack, "Invalid address in fdb get request");
4776 *addr = nla_data(tb[i]);
4779 err = fdb_vid_parse(tb[i], vid, extack);
4786 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb get request");
4794 static int rtnl_fdb_get(struct sk_buff *in_skb, struct nlmsghdr *nlh,
4795 struct netlink_ext_ack *extack)
4797 struct net_device *dev = NULL, *br_dev = NULL;
4798 const struct net_device_ops *ops = NULL;
4799 struct net *net = sock_net(in_skb->sk);
4800 struct nlattr *tb[NDA_MAX + 1];
4801 struct sk_buff *skb;
4809 err = valid_fdb_get_strict(nlh, tb, &ndm_flags, &br_idx,
4810 &brport_idx, &addr, &vid, extack);
4815 NL_SET_ERR_MSG(extack, "Missing lookup address for fdb get request");
4820 dev = __dev_get_by_index(net, brport_idx);
4822 NL_SET_ERR_MSG(extack, "Unknown device ifindex");
4829 NL_SET_ERR_MSG(extack, "Master and device are mutually exclusive");
4833 br_dev = __dev_get_by_index(net, br_idx);
4835 NL_SET_ERR_MSG(extack, "Invalid master ifindex");
4838 ops = br_dev->netdev_ops;
4842 if (!ndm_flags || (ndm_flags & NTF_MASTER)) {
4843 if (!netif_is_bridge_port(dev)) {
4844 NL_SET_ERR_MSG(extack, "Device is not a bridge port");
4847 br_dev = netdev_master_upper_dev_get(dev);
4849 NL_SET_ERR_MSG(extack, "Master of device not found");
4852 ops = br_dev->netdev_ops;
4854 if (!(ndm_flags & NTF_SELF)) {
4855 NL_SET_ERR_MSG(extack, "Missing NTF_SELF");
4858 ops = dev->netdev_ops;
4862 if (!br_dev && !dev) {
4863 NL_SET_ERR_MSG(extack, "No device specified");
4867 if (!ops || !ops->ndo_fdb_get) {
4868 NL_SET_ERR_MSG(extack, "Fdb get operation not supported by device");
4872 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
4878 err = ops->ndo_fdb_get(skb, tb, dev, addr, vid,
4879 NETLINK_CB(in_skb).portid,
4880 nlh->nlmsg_seq, extack);
4884 return rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
4890 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
4891 unsigned int attrnum, unsigned int flag)
4894 return nla_put_u8(skb, attrnum, !!(flags & flag));
4898 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
4899 struct net_device *dev, u16 mode,
4900 u32 flags, u32 mask, int nlflags,
4902 int (*vlan_fill)(struct sk_buff *skb,
4903 struct net_device *dev,
4906 struct nlmsghdr *nlh;
4907 struct ifinfomsg *ifm;
4908 struct nlattr *br_afspec;
4909 struct nlattr *protinfo;
4910 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
4911 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4914 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
4918 ifm = nlmsg_data(nlh);
4919 ifm->ifi_family = AF_BRIDGE;
4921 ifm->ifi_type = dev->type;
4922 ifm->ifi_index = dev->ifindex;
4923 ifm->ifi_flags = dev_get_flags(dev);
4924 ifm->ifi_change = 0;
4927 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
4928 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
4929 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
4931 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
4933 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
4934 (dev->ifindex != dev_get_iflink(dev) &&
4935 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
4936 goto nla_put_failure;
4938 br_afspec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
4940 goto nla_put_failure;
4942 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
4943 nla_nest_cancel(skb, br_afspec);
4944 goto nla_put_failure;
4947 if (mode != BRIDGE_MODE_UNDEF) {
4948 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
4949 nla_nest_cancel(skb, br_afspec);
4950 goto nla_put_failure;
4954 err = vlan_fill(skb, dev, filter_mask);
4956 nla_nest_cancel(skb, br_afspec);
4957 goto nla_put_failure;
4960 nla_nest_end(skb, br_afspec);
4962 protinfo = nla_nest_start(skb, IFLA_PROTINFO);
4964 goto nla_put_failure;
4966 if (brport_nla_put_flag(skb, flags, mask,
4967 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
4968 brport_nla_put_flag(skb, flags, mask,
4969 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
4970 brport_nla_put_flag(skb, flags, mask,
4971 IFLA_BRPORT_FAST_LEAVE,
4972 BR_MULTICAST_FAST_LEAVE) ||
4973 brport_nla_put_flag(skb, flags, mask,
4974 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
4975 brport_nla_put_flag(skb, flags, mask,
4976 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
4977 brport_nla_put_flag(skb, flags, mask,
4978 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
4979 brport_nla_put_flag(skb, flags, mask,
4980 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
4981 brport_nla_put_flag(skb, flags, mask,
4982 IFLA_BRPORT_PROXYARP, BR_PROXYARP) ||
4983 brport_nla_put_flag(skb, flags, mask,
4984 IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD) ||
4985 brport_nla_put_flag(skb, flags, mask,
4986 IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD)) {
4987 nla_nest_cancel(skb, protinfo);
4988 goto nla_put_failure;
4991 nla_nest_end(skb, protinfo);
4993 nlmsg_end(skb, nlh);
4996 nlmsg_cancel(skb, nlh);
4997 return err ? err : -EMSGSIZE;
4999 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
5001 static int valid_bridge_getlink_req(const struct nlmsghdr *nlh,
5002 bool strict_check, u32 *filter_mask,
5003 struct netlink_ext_ack *extack)
5005 struct nlattr *tb[IFLA_MAX+1];
5009 struct ifinfomsg *ifm;
5011 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
5012 NL_SET_ERR_MSG(extack, "Invalid header for bridge link dump");
5016 ifm = nlmsg_data(nlh);
5017 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
5018 ifm->ifi_change || ifm->ifi_index) {
5019 NL_SET_ERR_MSG(extack, "Invalid values in header for bridge link dump request");
5023 err = nlmsg_parse_deprecated_strict(nlh,
5024 sizeof(struct ifinfomsg),
5025 tb, IFLA_MAX, ifla_policy,
5028 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
5029 tb, IFLA_MAX, ifla_policy,
5035 /* new attributes should only be added with strict checking */
5036 for (i = 0; i <= IFLA_MAX; ++i) {
5042 *filter_mask = nla_get_u32(tb[i]);
5046 NL_SET_ERR_MSG(extack, "Unsupported attribute in bridge link dump request");
5055 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
5057 const struct nlmsghdr *nlh = cb->nlh;
5058 struct net *net = sock_net(skb->sk);
5059 struct net_device *dev;
5061 u32 portid = NETLINK_CB(cb->skb).portid;
5062 u32 seq = nlh->nlmsg_seq;
5063 u32 filter_mask = 0;
5066 err = valid_bridge_getlink_req(nlh, cb->strict_check, &filter_mask,
5068 if (err < 0 && cb->strict_check)
5072 for_each_netdev_rcu(net, dev) {
5073 const struct net_device_ops *ops = dev->netdev_ops;
5074 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
5076 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
5077 if (idx >= cb->args[0]) {
5078 err = br_dev->netdev_ops->ndo_bridge_getlink(
5079 skb, portid, seq, dev,
5080 filter_mask, NLM_F_MULTI);
5081 if (err < 0 && err != -EOPNOTSUPP) {
5082 if (likely(skb->len))
5091 if (ops->ndo_bridge_getlink) {
5092 if (idx >= cb->args[0]) {
5093 err = ops->ndo_bridge_getlink(skb, portid,
5097 if (err < 0 && err != -EOPNOTSUPP) {
5098 if (likely(skb->len))
5115 static inline size_t bridge_nlmsg_size(void)
5117 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
5118 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
5119 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
5120 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
5121 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
5122 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
5123 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
5124 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
5125 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
5126 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
5127 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
5130 static int rtnl_bridge_notify(struct net_device *dev)
5132 struct net *net = dev_net(dev);
5133 struct sk_buff *skb;
5134 int err = -EOPNOTSUPP;
5136 if (!dev->netdev_ops->ndo_bridge_getlink)
5139 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
5145 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
5149 /* Notification info is only filled for bridge ports, not the bridge
5150 * device itself. Therefore, a zero notification length is valid and
5151 * should not result in an error.
5156 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
5159 WARN_ON(err == -EMSGSIZE);
5162 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
5166 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
5167 struct netlink_ext_ack *extack)
5169 struct net *net = sock_net(skb->sk);
5170 struct ifinfomsg *ifm;
5171 struct net_device *dev;
5172 struct nlattr *br_spec, *attr, *br_flags_attr = NULL;
5173 int rem, err = -EOPNOTSUPP;
5176 if (nlmsg_len(nlh) < sizeof(*ifm))
5179 ifm = nlmsg_data(nlh);
5180 if (ifm->ifi_family != AF_BRIDGE)
5181 return -EPFNOSUPPORT;
5183 dev = __dev_get_by_index(net, ifm->ifi_index);
5185 NL_SET_ERR_MSG(extack, "unknown ifindex");
5189 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
5191 nla_for_each_nested(attr, br_spec, rem) {
5192 if (nla_type(attr) == IFLA_BRIDGE_FLAGS && !br_flags_attr) {
5193 if (nla_len(attr) < sizeof(flags))
5196 br_flags_attr = attr;
5197 flags = nla_get_u16(attr);
5200 if (nla_type(attr) == IFLA_BRIDGE_MODE) {
5201 if (nla_len(attr) < sizeof(u16))
5207 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
5208 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
5210 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
5215 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags,
5220 flags &= ~BRIDGE_FLAGS_MASTER;
5223 if ((flags & BRIDGE_FLAGS_SELF)) {
5224 if (!dev->netdev_ops->ndo_bridge_setlink)
5227 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
5231 flags &= ~BRIDGE_FLAGS_SELF;
5233 /* Generate event to notify upper layer of bridge
5236 err = rtnl_bridge_notify(dev);
5241 memcpy(nla_data(br_flags_attr), &flags, sizeof(flags));
5246 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
5247 struct netlink_ext_ack *extack)
5249 struct net *net = sock_net(skb->sk);
5250 struct ifinfomsg *ifm;
5251 struct net_device *dev;
5252 struct nlattr *br_spec, *attr = NULL;
5253 int rem, err = -EOPNOTSUPP;
5255 bool have_flags = false;
5257 if (nlmsg_len(nlh) < sizeof(*ifm))
5260 ifm = nlmsg_data(nlh);
5261 if (ifm->ifi_family != AF_BRIDGE)
5262 return -EPFNOSUPPORT;
5264 dev = __dev_get_by_index(net, ifm->ifi_index);
5266 NL_SET_ERR_MSG(extack, "unknown ifindex");
5270 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
5272 nla_for_each_nested(attr, br_spec, rem) {
5273 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
5274 if (nla_len(attr) < sizeof(flags))
5278 flags = nla_get_u16(attr);
5284 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
5285 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
5287 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
5292 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
5296 flags &= ~BRIDGE_FLAGS_MASTER;
5299 if ((flags & BRIDGE_FLAGS_SELF)) {
5300 if (!dev->netdev_ops->ndo_bridge_dellink)
5303 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
5307 flags &= ~BRIDGE_FLAGS_SELF;
5309 /* Generate event to notify upper layer of bridge
5312 err = rtnl_bridge_notify(dev);
5317 memcpy(nla_data(attr), &flags, sizeof(flags));
5322 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
5324 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
5325 (!idxattr || idxattr == attrid);
5329 rtnl_offload_xstats_have_ndo(const struct net_device *dev, int attr_id)
5331 return dev->netdev_ops &&
5332 dev->netdev_ops->ndo_has_offload_stats &&
5333 dev->netdev_ops->ndo_get_offload_stats &&
5334 dev->netdev_ops->ndo_has_offload_stats(dev, attr_id);
5338 rtnl_offload_xstats_get_size_ndo(const struct net_device *dev, int attr_id)
5340 return rtnl_offload_xstats_have_ndo(dev, attr_id) ?
5341 sizeof(struct rtnl_link_stats64) : 0;
5345 rtnl_offload_xstats_fill_ndo(struct net_device *dev, int attr_id,
5346 struct sk_buff *skb)
5348 unsigned int size = rtnl_offload_xstats_get_size_ndo(dev, attr_id);
5349 struct nlattr *attr = NULL;
5356 attr = nla_reserve_64bit(skb, attr_id, size,
5357 IFLA_OFFLOAD_XSTATS_UNSPEC);
5361 attr_data = nla_data(attr);
5362 memset(attr_data, 0, size);
5364 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev, attr_data);
5372 rtnl_offload_xstats_get_size_stats(const struct net_device *dev,
5373 enum netdev_offload_xstats_type type)
5375 bool enabled = netdev_offload_xstats_enabled(dev, type);
5377 return enabled ? sizeof(struct rtnl_hw_stats64) : 0;
5380 struct rtnl_offload_xstats_request_used {
5386 rtnl_offload_xstats_get_stats(struct net_device *dev,
5387 enum netdev_offload_xstats_type type,
5388 struct rtnl_offload_xstats_request_used *ru,
5389 struct rtnl_hw_stats64 *stats,
5390 struct netlink_ext_ack *extack)
5396 request = netdev_offload_xstats_enabled(dev, type);
5402 err = netdev_offload_xstats_get(dev, type, stats, &used, extack);
5408 ru->request = request;
5415 rtnl_offload_xstats_fill_hw_s_info_one(struct sk_buff *skb, int attr_id,
5416 struct rtnl_offload_xstats_request_used *ru)
5418 struct nlattr *nest;
5420 nest = nla_nest_start(skb, attr_id);
5424 if (nla_put_u8(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO_REQUEST, ru->request))
5425 goto nla_put_failure;
5427 if (nla_put_u8(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO_USED, ru->used))
5428 goto nla_put_failure;
5430 nla_nest_end(skb, nest);
5434 nla_nest_cancel(skb, nest);
5439 rtnl_offload_xstats_fill_hw_s_info(struct sk_buff *skb, struct net_device *dev,
5440 struct netlink_ext_ack *extack)
5442 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
5443 struct rtnl_offload_xstats_request_used ru_l3;
5444 struct nlattr *nest;
5447 err = rtnl_offload_xstats_get_stats(dev, t_l3, &ru_l3, NULL, extack);
5451 nest = nla_nest_start(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO);
5455 if (rtnl_offload_xstats_fill_hw_s_info_one(skb,
5456 IFLA_OFFLOAD_XSTATS_L3_STATS,
5458 goto nla_put_failure;
5460 nla_nest_end(skb, nest);
5464 nla_nest_cancel(skb, nest);
5468 static int rtnl_offload_xstats_fill(struct sk_buff *skb, struct net_device *dev,
5469 int *prividx, u32 off_filter_mask,
5470 struct netlink_ext_ack *extack)
5472 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
5473 int attr_id_hw_s_info = IFLA_OFFLOAD_XSTATS_HW_S_INFO;
5474 int attr_id_l3_stats = IFLA_OFFLOAD_XSTATS_L3_STATS;
5475 int attr_id_cpu_hit = IFLA_OFFLOAD_XSTATS_CPU_HIT;
5476 bool have_data = false;
5479 if (*prividx <= attr_id_cpu_hit &&
5481 IFLA_STATS_FILTER_BIT(attr_id_cpu_hit))) {
5482 err = rtnl_offload_xstats_fill_ndo(dev, attr_id_cpu_hit, skb);
5485 } else if (err != -ENODATA) {
5486 *prividx = attr_id_cpu_hit;
5491 if (*prividx <= attr_id_hw_s_info &&
5492 (off_filter_mask & IFLA_STATS_FILTER_BIT(attr_id_hw_s_info))) {
5493 *prividx = attr_id_hw_s_info;
5495 err = rtnl_offload_xstats_fill_hw_s_info(skb, dev, extack);
5503 if (*prividx <= attr_id_l3_stats &&
5504 (off_filter_mask & IFLA_STATS_FILTER_BIT(attr_id_l3_stats))) {
5505 unsigned int size_l3;
5506 struct nlattr *attr;
5508 *prividx = attr_id_l3_stats;
5510 size_l3 = rtnl_offload_xstats_get_size_stats(dev, t_l3);
5513 attr = nla_reserve_64bit(skb, attr_id_l3_stats, size_l3,
5514 IFLA_OFFLOAD_XSTATS_UNSPEC);
5518 err = rtnl_offload_xstats_get_stats(dev, t_l3, NULL,
5519 nla_data(attr), extack);
5536 rtnl_offload_xstats_get_size_hw_s_info_one(const struct net_device *dev,
5537 enum netdev_offload_xstats_type type)
5539 return nla_total_size(0) +
5540 /* IFLA_OFFLOAD_XSTATS_HW_S_INFO_REQUEST */
5541 nla_total_size(sizeof(u8)) +
5542 /* IFLA_OFFLOAD_XSTATS_HW_S_INFO_USED */
5543 nla_total_size(sizeof(u8)) +
5548 rtnl_offload_xstats_get_size_hw_s_info(const struct net_device *dev)
5550 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
5552 return nla_total_size(0) +
5553 /* IFLA_OFFLOAD_XSTATS_L3_STATS */
5554 rtnl_offload_xstats_get_size_hw_s_info_one(dev, t_l3) +
5558 static int rtnl_offload_xstats_get_size(const struct net_device *dev,
5559 u32 off_filter_mask)
5561 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
5562 int attr_id_cpu_hit = IFLA_OFFLOAD_XSTATS_CPU_HIT;
5566 if (off_filter_mask &
5567 IFLA_STATS_FILTER_BIT(attr_id_cpu_hit)) {
5568 size = rtnl_offload_xstats_get_size_ndo(dev, attr_id_cpu_hit);
5569 nla_size += nla_total_size_64bit(size);
5572 if (off_filter_mask &
5573 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO))
5574 nla_size += rtnl_offload_xstats_get_size_hw_s_info(dev);
5576 if (off_filter_mask &
5577 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_L3_STATS)) {
5578 size = rtnl_offload_xstats_get_size_stats(dev, t_l3);
5579 nla_size += nla_total_size_64bit(size);
5583 nla_size += nla_total_size(0);
5588 struct rtnl_stats_dump_filters {
5589 /* mask[0] filters outer attributes. Then individual nests have their
5590 * filtering mask at the index of the nested attribute.
5592 u32 mask[IFLA_STATS_MAX + 1];
5595 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
5596 int type, u32 pid, u32 seq, u32 change,
5598 const struct rtnl_stats_dump_filters *filters,
5599 int *idxattr, int *prividx,
5600 struct netlink_ext_ack *extack)
5602 unsigned int filter_mask = filters->mask[0];
5603 struct if_stats_msg *ifsm;
5604 struct nlmsghdr *nlh;
5605 struct nlattr *attr;
5606 int s_prividx = *prividx;
5611 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
5615 ifsm = nlmsg_data(nlh);
5616 ifsm->family = PF_UNSPEC;
5619 ifsm->ifindex = dev->ifindex;
5620 ifsm->filter_mask = filter_mask;
5622 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
5623 struct rtnl_link_stats64 *sp;
5625 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
5626 sizeof(struct rtnl_link_stats64),
5630 goto nla_put_failure;
5633 sp = nla_data(attr);
5634 dev_get_stats(dev, sp);
5637 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
5638 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
5640 if (ops && ops->fill_linkxstats) {
5641 *idxattr = IFLA_STATS_LINK_XSTATS;
5642 attr = nla_nest_start_noflag(skb,
5643 IFLA_STATS_LINK_XSTATS);
5646 goto nla_put_failure;
5649 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
5650 nla_nest_end(skb, attr);
5652 goto nla_put_failure;
5657 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
5659 const struct rtnl_link_ops *ops = NULL;
5660 const struct net_device *master;
5662 master = netdev_master_upper_dev_get(dev);
5664 ops = master->rtnl_link_ops;
5665 if (ops && ops->fill_linkxstats) {
5666 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
5667 attr = nla_nest_start_noflag(skb,
5668 IFLA_STATS_LINK_XSTATS_SLAVE);
5671 goto nla_put_failure;
5674 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
5675 nla_nest_end(skb, attr);
5677 goto nla_put_failure;
5682 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
5684 u32 off_filter_mask;
5686 off_filter_mask = filters->mask[IFLA_STATS_LINK_OFFLOAD_XSTATS];
5687 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
5688 attr = nla_nest_start_noflag(skb,
5689 IFLA_STATS_LINK_OFFLOAD_XSTATS);
5692 goto nla_put_failure;
5695 err = rtnl_offload_xstats_fill(skb, dev, prividx,
5696 off_filter_mask, extack);
5697 if (err == -ENODATA)
5698 nla_nest_cancel(skb, attr);
5700 nla_nest_end(skb, attr);
5702 if (err && err != -ENODATA)
5703 goto nla_put_failure;
5707 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
5708 struct rtnl_af_ops *af_ops;
5710 *idxattr = IFLA_STATS_AF_SPEC;
5711 attr = nla_nest_start_noflag(skb, IFLA_STATS_AF_SPEC);
5714 goto nla_put_failure;
5718 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
5719 if (af_ops->fill_stats_af) {
5722 af = nla_nest_start_noflag(skb,
5727 goto nla_put_failure;
5729 err = af_ops->fill_stats_af(skb, dev);
5731 if (err == -ENODATA) {
5732 nla_nest_cancel(skb, af);
5733 } else if (err < 0) {
5735 goto nla_put_failure;
5738 nla_nest_end(skb, af);
5743 nla_nest_end(skb, attr);
5748 nlmsg_end(skb, nlh);
5753 /* not a multi message or no progress mean a real error */
5754 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
5755 nlmsg_cancel(skb, nlh);
5757 nlmsg_end(skb, nlh);
5762 static size_t if_nlmsg_stats_size(const struct net_device *dev,
5763 const struct rtnl_stats_dump_filters *filters)
5765 size_t size = NLMSG_ALIGN(sizeof(struct if_stats_msg));
5766 unsigned int filter_mask = filters->mask[0];
5768 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
5769 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
5771 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
5772 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
5773 int attr = IFLA_STATS_LINK_XSTATS;
5775 if (ops && ops->get_linkxstats_size) {
5776 size += nla_total_size(ops->get_linkxstats_size(dev,
5778 /* for IFLA_STATS_LINK_XSTATS */
5779 size += nla_total_size(0);
5783 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
5784 struct net_device *_dev = (struct net_device *)dev;
5785 const struct rtnl_link_ops *ops = NULL;
5786 const struct net_device *master;
5788 /* netdev_master_upper_dev_get can't take const */
5789 master = netdev_master_upper_dev_get(_dev);
5791 ops = master->rtnl_link_ops;
5792 if (ops && ops->get_linkxstats_size) {
5793 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
5795 size += nla_total_size(ops->get_linkxstats_size(dev,
5797 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
5798 size += nla_total_size(0);
5802 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0)) {
5803 u32 off_filter_mask;
5805 off_filter_mask = filters->mask[IFLA_STATS_LINK_OFFLOAD_XSTATS];
5806 size += rtnl_offload_xstats_get_size(dev, off_filter_mask);
5809 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
5810 struct rtnl_af_ops *af_ops;
5812 /* for IFLA_STATS_AF_SPEC */
5813 size += nla_total_size(0);
5816 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
5817 if (af_ops->get_stats_af_size) {
5818 size += nla_total_size(
5819 af_ops->get_stats_af_size(dev));
5822 size += nla_total_size(0);
5831 #define RTNL_STATS_OFFLOAD_XSTATS_VALID ((1 << __IFLA_OFFLOAD_XSTATS_MAX) - 1)
5833 static const struct nla_policy
5834 rtnl_stats_get_policy_filters[IFLA_STATS_MAX + 1] = {
5835 [IFLA_STATS_LINK_OFFLOAD_XSTATS] =
5836 NLA_POLICY_MASK(NLA_U32, RTNL_STATS_OFFLOAD_XSTATS_VALID),
5839 static const struct nla_policy
5840 rtnl_stats_get_policy[IFLA_STATS_GETSET_MAX + 1] = {
5841 [IFLA_STATS_GET_FILTERS] =
5842 NLA_POLICY_NESTED(rtnl_stats_get_policy_filters),
5845 static const struct nla_policy
5846 ifla_stats_set_policy[IFLA_STATS_GETSET_MAX + 1] = {
5847 [IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS] = NLA_POLICY_MAX(NLA_U8, 1),
5850 static int rtnl_stats_get_parse_filters(struct nlattr *ifla_filters,
5851 struct rtnl_stats_dump_filters *filters,
5852 struct netlink_ext_ack *extack)
5854 struct nlattr *tb[IFLA_STATS_MAX + 1];
5858 err = nla_parse_nested(tb, IFLA_STATS_MAX, ifla_filters,
5859 rtnl_stats_get_policy_filters, extack);
5863 for (at = 1; at <= IFLA_STATS_MAX; at++) {
5865 if (!(filters->mask[0] & IFLA_STATS_FILTER_BIT(at))) {
5866 NL_SET_ERR_MSG(extack, "Filtered attribute not enabled in filter_mask");
5869 filters->mask[at] = nla_get_u32(tb[at]);
5876 static int rtnl_stats_get_parse(const struct nlmsghdr *nlh,
5878 struct rtnl_stats_dump_filters *filters,
5879 struct netlink_ext_ack *extack)
5881 struct nlattr *tb[IFLA_STATS_GETSET_MAX + 1];
5885 filters->mask[0] = filter_mask;
5886 for (i = 1; i < ARRAY_SIZE(filters->mask); i++)
5887 filters->mask[i] = -1U;
5889 err = nlmsg_parse(nlh, sizeof(struct if_stats_msg), tb,
5890 IFLA_STATS_GETSET_MAX, rtnl_stats_get_policy, extack);
5894 if (tb[IFLA_STATS_GET_FILTERS]) {
5895 err = rtnl_stats_get_parse_filters(tb[IFLA_STATS_GET_FILTERS],
5904 static int rtnl_valid_stats_req(const struct nlmsghdr *nlh, bool strict_check,
5905 bool is_dump, struct netlink_ext_ack *extack)
5907 struct if_stats_msg *ifsm;
5909 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifsm))) {
5910 NL_SET_ERR_MSG(extack, "Invalid header for stats dump");
5917 ifsm = nlmsg_data(nlh);
5919 /* only requests using strict checks can pass data to influence
5920 * the dump. The legacy exception is filter_mask.
5922 if (ifsm->pad1 || ifsm->pad2 || (is_dump && ifsm->ifindex)) {
5923 NL_SET_ERR_MSG(extack, "Invalid values in header for stats dump request");
5926 if (ifsm->filter_mask >= IFLA_STATS_FILTER_BIT(IFLA_STATS_MAX + 1)) {
5927 NL_SET_ERR_MSG(extack, "Invalid stats requested through filter mask");
5934 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
5935 struct netlink_ext_ack *extack)
5937 struct rtnl_stats_dump_filters filters;
5938 struct net *net = sock_net(skb->sk);
5939 struct net_device *dev = NULL;
5940 int idxattr = 0, prividx = 0;
5941 struct if_stats_msg *ifsm;
5942 struct sk_buff *nskb;
5945 err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb),
5950 ifsm = nlmsg_data(nlh);
5951 if (ifsm->ifindex > 0)
5952 dev = __dev_get_by_index(net, ifsm->ifindex);
5959 if (!ifsm->filter_mask) {
5960 NL_SET_ERR_MSG(extack, "Filter mask must be set for stats get");
5964 err = rtnl_stats_get_parse(nlh, ifsm->filter_mask, &filters, extack);
5968 nskb = nlmsg_new(if_nlmsg_stats_size(dev, &filters), GFP_KERNEL);
5972 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
5973 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
5974 0, &filters, &idxattr, &prividx, extack);
5976 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
5977 WARN_ON(err == -EMSGSIZE);
5980 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
5986 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
5988 struct netlink_ext_ack *extack = cb->extack;
5989 int h, s_h, err, s_idx, s_idxattr, s_prividx;
5990 struct rtnl_stats_dump_filters filters;
5991 struct net *net = sock_net(skb->sk);
5992 unsigned int flags = NLM_F_MULTI;
5993 struct if_stats_msg *ifsm;
5994 struct hlist_head *head;
5995 struct net_device *dev;
5999 s_idx = cb->args[1];
6000 s_idxattr = cb->args[2];
6001 s_prividx = cb->args[3];
6003 cb->seq = net->dev_base_seq;
6005 err = rtnl_valid_stats_req(cb->nlh, cb->strict_check, true, extack);
6009 ifsm = nlmsg_data(cb->nlh);
6010 if (!ifsm->filter_mask) {
6011 NL_SET_ERR_MSG(extack, "Filter mask must be set for stats dump");
6015 err = rtnl_stats_get_parse(cb->nlh, ifsm->filter_mask, &filters,
6020 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
6022 head = &net->dev_index_head[h];
6023 hlist_for_each_entry(dev, head, index_hlist) {
6026 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
6027 NETLINK_CB(cb->skb).portid,
6028 cb->nlh->nlmsg_seq, 0,
6030 &s_idxattr, &s_prividx,
6032 /* If we ran out of room on the first message,
6035 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
6041 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
6047 cb->args[3] = s_prividx;
6048 cb->args[2] = s_idxattr;
6055 void rtnl_offload_xstats_notify(struct net_device *dev)
6057 struct rtnl_stats_dump_filters response_filters = {};
6058 struct net *net = dev_net(dev);
6059 int idxattr = 0, prividx = 0;
6060 struct sk_buff *skb;
6065 response_filters.mask[0] |=
6066 IFLA_STATS_FILTER_BIT(IFLA_STATS_LINK_OFFLOAD_XSTATS);
6067 response_filters.mask[IFLA_STATS_LINK_OFFLOAD_XSTATS] |=
6068 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO);
6070 skb = nlmsg_new(if_nlmsg_stats_size(dev, &response_filters),
6075 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS, 0, 0, 0, 0,
6076 &response_filters, &idxattr, &prividx, NULL);
6082 rtnl_notify(skb, net, 0, RTNLGRP_STATS, NULL, GFP_KERNEL);
6086 rtnl_set_sk_err(net, RTNLGRP_STATS, err);
6088 EXPORT_SYMBOL(rtnl_offload_xstats_notify);
6090 static int rtnl_stats_set(struct sk_buff *skb, struct nlmsghdr *nlh,
6091 struct netlink_ext_ack *extack)
6093 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
6094 struct rtnl_stats_dump_filters response_filters = {};
6095 struct nlattr *tb[IFLA_STATS_GETSET_MAX + 1];
6096 struct net *net = sock_net(skb->sk);
6097 struct net_device *dev = NULL;
6098 struct if_stats_msg *ifsm;
6099 bool notify = false;
6102 err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb),
6107 ifsm = nlmsg_data(nlh);
6108 if (ifsm->family != AF_UNSPEC) {
6109 NL_SET_ERR_MSG(extack, "Address family should be AF_UNSPEC");
6113 if (ifsm->ifindex > 0)
6114 dev = __dev_get_by_index(net, ifsm->ifindex);
6121 if (ifsm->filter_mask) {
6122 NL_SET_ERR_MSG(extack, "Filter mask must be 0 for stats set");
6126 err = nlmsg_parse(nlh, sizeof(*ifsm), tb, IFLA_STATS_GETSET_MAX,
6127 ifla_stats_set_policy, extack);
6131 if (tb[IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS]) {
6132 u8 req = nla_get_u8(tb[IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS]);
6135 err = netdev_offload_xstats_enable(dev, t_l3, extack);
6137 err = netdev_offload_xstats_disable(dev, t_l3);
6141 else if (err != -EALREADY)
6144 response_filters.mask[0] |=
6145 IFLA_STATS_FILTER_BIT(IFLA_STATS_LINK_OFFLOAD_XSTATS);
6146 response_filters.mask[IFLA_STATS_LINK_OFFLOAD_XSTATS] |=
6147 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO);
6151 rtnl_offload_xstats_notify(dev);
6156 static int rtnl_mdb_valid_dump_req(const struct nlmsghdr *nlh,
6157 struct netlink_ext_ack *extack)
6159 struct br_port_msg *bpm;
6161 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*bpm))) {
6162 NL_SET_ERR_MSG(extack, "Invalid header for mdb dump request");
6166 bpm = nlmsg_data(nlh);
6168 NL_SET_ERR_MSG(extack, "Filtering by device index is not supported for mdb dump request");
6171 if (nlmsg_attrlen(nlh, sizeof(*bpm))) {
6172 NL_SET_ERR_MSG(extack, "Invalid data after header in mdb dump request");
6179 struct rtnl_mdb_dump_ctx {
6183 static int rtnl_mdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
6185 struct rtnl_mdb_dump_ctx *ctx = (void *)cb->ctx;
6186 struct net *net = sock_net(skb->sk);
6187 struct net_device *dev;
6191 NL_ASSERT_DUMP_CTX_FITS(struct rtnl_mdb_dump_ctx);
6193 if (cb->strict_check) {
6194 err = rtnl_mdb_valid_dump_req(cb->nlh, cb->extack);
6202 for_each_netdev(net, dev) {
6205 if (!dev->netdev_ops->ndo_mdb_dump)
6208 err = dev->netdev_ops->ndo_mdb_dump(dev, skb, cb);
6209 if (err == -EMSGSIZE)
6211 /* Moving on to next device, reset markers and sequence
6212 * counters since they are all maintained per-device.
6214 memset(cb->ctx, 0, sizeof(cb->ctx));
6226 static int rtnl_validate_mdb_entry_get(const struct nlattr *attr,
6227 struct netlink_ext_ack *extack)
6229 struct br_mdb_entry *entry = nla_data(attr);
6231 if (nla_len(attr) != sizeof(struct br_mdb_entry)) {
6232 NL_SET_ERR_MSG_ATTR(extack, attr, "Invalid attribute length");
6236 if (entry->ifindex) {
6237 NL_SET_ERR_MSG(extack, "Entry ifindex cannot be specified");
6242 NL_SET_ERR_MSG(extack, "Entry state cannot be specified");
6247 NL_SET_ERR_MSG(extack, "Entry flags cannot be specified");
6251 if (entry->vid >= VLAN_VID_MASK) {
6252 NL_SET_ERR_MSG(extack, "Invalid entry VLAN id");
6256 if (entry->addr.proto != htons(ETH_P_IP) &&
6257 entry->addr.proto != htons(ETH_P_IPV6) &&
6258 entry->addr.proto != 0) {
6259 NL_SET_ERR_MSG(extack, "Unknown entry protocol");
6266 static const struct nla_policy mdba_get_policy[MDBA_GET_ENTRY_MAX + 1] = {
6267 [MDBA_GET_ENTRY] = NLA_POLICY_VALIDATE_FN(NLA_BINARY,
6268 rtnl_validate_mdb_entry_get,
6269 sizeof(struct br_mdb_entry)),
6270 [MDBA_GET_ENTRY_ATTRS] = { .type = NLA_NESTED },
6273 static int rtnl_mdb_get(struct sk_buff *in_skb, struct nlmsghdr *nlh,
6274 struct netlink_ext_ack *extack)
6276 struct nlattr *tb[MDBA_GET_ENTRY_MAX + 1];
6277 struct net *net = sock_net(in_skb->sk);
6278 struct br_port_msg *bpm;
6279 struct net_device *dev;
6282 err = nlmsg_parse(nlh, sizeof(struct br_port_msg), tb,
6283 MDBA_GET_ENTRY_MAX, mdba_get_policy, extack);
6287 bpm = nlmsg_data(nlh);
6288 if (!bpm->ifindex) {
6289 NL_SET_ERR_MSG(extack, "Invalid ifindex");
6293 dev = __dev_get_by_index(net, bpm->ifindex);
6295 NL_SET_ERR_MSG(extack, "Device doesn't exist");
6299 if (NL_REQ_ATTR_CHECK(extack, NULL, tb, MDBA_GET_ENTRY)) {
6300 NL_SET_ERR_MSG(extack, "Missing MDBA_GET_ENTRY attribute");
6304 if (!dev->netdev_ops->ndo_mdb_get) {
6305 NL_SET_ERR_MSG(extack, "Device does not support MDB operations");
6309 return dev->netdev_ops->ndo_mdb_get(dev, tb, NETLINK_CB(in_skb).portid,
6310 nlh->nlmsg_seq, extack);
6313 static int rtnl_validate_mdb_entry(const struct nlattr *attr,
6314 struct netlink_ext_ack *extack)
6316 struct br_mdb_entry *entry = nla_data(attr);
6318 if (nla_len(attr) != sizeof(struct br_mdb_entry)) {
6319 NL_SET_ERR_MSG_ATTR(extack, attr, "Invalid attribute length");
6323 if (entry->ifindex == 0) {
6324 NL_SET_ERR_MSG(extack, "Zero entry ifindex is not allowed");
6328 if (entry->addr.proto == htons(ETH_P_IP)) {
6329 if (!ipv4_is_multicast(entry->addr.u.ip4) &&
6330 !ipv4_is_zeronet(entry->addr.u.ip4)) {
6331 NL_SET_ERR_MSG(extack, "IPv4 entry group address is not multicast or 0.0.0.0");
6334 if (ipv4_is_local_multicast(entry->addr.u.ip4)) {
6335 NL_SET_ERR_MSG(extack, "IPv4 entry group address is local multicast");
6338 #if IS_ENABLED(CONFIG_IPV6)
6339 } else if (entry->addr.proto == htons(ETH_P_IPV6)) {
6340 if (ipv6_addr_is_ll_all_nodes(&entry->addr.u.ip6)) {
6341 NL_SET_ERR_MSG(extack, "IPv6 entry group address is link-local all nodes");
6345 } else if (entry->addr.proto == 0) {
6347 if (!is_multicast_ether_addr(entry->addr.u.mac_addr)) {
6348 NL_SET_ERR_MSG(extack, "L2 entry group is not multicast");
6352 NL_SET_ERR_MSG(extack, "Unknown entry protocol");
6356 if (entry->state != MDB_PERMANENT && entry->state != MDB_TEMPORARY) {
6357 NL_SET_ERR_MSG(extack, "Unknown entry state");
6360 if (entry->vid >= VLAN_VID_MASK) {
6361 NL_SET_ERR_MSG(extack, "Invalid entry VLAN id");
6368 static const struct nla_policy mdba_policy[MDBA_SET_ENTRY_MAX + 1] = {
6369 [MDBA_SET_ENTRY_UNSPEC] = { .strict_start_type = MDBA_SET_ENTRY_ATTRS + 1 },
6370 [MDBA_SET_ENTRY] = NLA_POLICY_VALIDATE_FN(NLA_BINARY,
6371 rtnl_validate_mdb_entry,
6372 sizeof(struct br_mdb_entry)),
6373 [MDBA_SET_ENTRY_ATTRS] = { .type = NLA_NESTED },
6376 static int rtnl_mdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
6377 struct netlink_ext_ack *extack)
6379 struct nlattr *tb[MDBA_SET_ENTRY_MAX + 1];
6380 struct net *net = sock_net(skb->sk);
6381 struct br_port_msg *bpm;
6382 struct net_device *dev;
6385 err = nlmsg_parse_deprecated(nlh, sizeof(*bpm), tb,
6386 MDBA_SET_ENTRY_MAX, mdba_policy, extack);
6390 bpm = nlmsg_data(nlh);
6391 if (!bpm->ifindex) {
6392 NL_SET_ERR_MSG(extack, "Invalid ifindex");
6396 dev = __dev_get_by_index(net, bpm->ifindex);
6398 NL_SET_ERR_MSG(extack, "Device doesn't exist");
6402 if (NL_REQ_ATTR_CHECK(extack, NULL, tb, MDBA_SET_ENTRY)) {
6403 NL_SET_ERR_MSG(extack, "Missing MDBA_SET_ENTRY attribute");
6407 if (!dev->netdev_ops->ndo_mdb_add) {
6408 NL_SET_ERR_MSG(extack, "Device does not support MDB operations");
6412 return dev->netdev_ops->ndo_mdb_add(dev, tb, nlh->nlmsg_flags, extack);
6415 static int rtnl_validate_mdb_entry_del_bulk(const struct nlattr *attr,
6416 struct netlink_ext_ack *extack)
6418 struct br_mdb_entry *entry = nla_data(attr);
6419 struct br_mdb_entry zero_entry = {};
6421 if (nla_len(attr) != sizeof(struct br_mdb_entry)) {
6422 NL_SET_ERR_MSG_ATTR(extack, attr, "Invalid attribute length");
6426 if (entry->state != MDB_PERMANENT && entry->state != MDB_TEMPORARY) {
6427 NL_SET_ERR_MSG(extack, "Unknown entry state");
6432 NL_SET_ERR_MSG(extack, "Entry flags cannot be set");
6436 if (entry->vid >= VLAN_N_VID - 1) {
6437 NL_SET_ERR_MSG(extack, "Invalid entry VLAN id");
6441 if (memcmp(&entry->addr, &zero_entry.addr, sizeof(entry->addr))) {
6442 NL_SET_ERR_MSG(extack, "Entry address cannot be set");
6449 static const struct nla_policy mdba_del_bulk_policy[MDBA_SET_ENTRY_MAX + 1] = {
6450 [MDBA_SET_ENTRY] = NLA_POLICY_VALIDATE_FN(NLA_BINARY,
6451 rtnl_validate_mdb_entry_del_bulk,
6452 sizeof(struct br_mdb_entry)),
6453 [MDBA_SET_ENTRY_ATTRS] = { .type = NLA_NESTED },
6456 static int rtnl_mdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
6457 struct netlink_ext_ack *extack)
6459 bool del_bulk = !!(nlh->nlmsg_flags & NLM_F_BULK);
6460 struct nlattr *tb[MDBA_SET_ENTRY_MAX + 1];
6461 struct net *net = sock_net(skb->sk);
6462 struct br_port_msg *bpm;
6463 struct net_device *dev;
6467 err = nlmsg_parse_deprecated(nlh, sizeof(*bpm), tb,
6468 MDBA_SET_ENTRY_MAX, mdba_policy,
6471 err = nlmsg_parse(nlh, sizeof(*bpm), tb, MDBA_SET_ENTRY_MAX,
6472 mdba_del_bulk_policy, extack);
6476 bpm = nlmsg_data(nlh);
6477 if (!bpm->ifindex) {
6478 NL_SET_ERR_MSG(extack, "Invalid ifindex");
6482 dev = __dev_get_by_index(net, bpm->ifindex);
6484 NL_SET_ERR_MSG(extack, "Device doesn't exist");
6488 if (NL_REQ_ATTR_CHECK(extack, NULL, tb, MDBA_SET_ENTRY)) {
6489 NL_SET_ERR_MSG(extack, "Missing MDBA_SET_ENTRY attribute");
6494 if (!dev->netdev_ops->ndo_mdb_del_bulk) {
6495 NL_SET_ERR_MSG(extack, "Device does not support MDB bulk deletion");
6498 return dev->netdev_ops->ndo_mdb_del_bulk(dev, tb, extack);
6501 if (!dev->netdev_ops->ndo_mdb_del) {
6502 NL_SET_ERR_MSG(extack, "Device does not support MDB operations");
6506 return dev->netdev_ops->ndo_mdb_del(dev, tb, extack);
6509 /* Process one rtnetlink message. */
6511 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
6512 struct netlink_ext_ack *extack)
6514 struct net *net = sock_net(skb->sk);
6515 struct rtnl_link *link;
6516 enum rtnl_kinds kind;
6517 struct module *owner;
6518 int err = -EOPNOTSUPP;
6519 rtnl_doit_func doit;
6524 type = nlh->nlmsg_type;
6530 /* All the messages must have at least 1 byte length */
6531 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
6534 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
6535 kind = rtnl_msgtype_kind(type);
6537 if (kind != RTNL_KIND_GET && !netlink_net_capable(skb, CAP_NET_ADMIN))
6541 if (kind == RTNL_KIND_GET && (nlh->nlmsg_flags & NLM_F_DUMP)) {
6543 rtnl_dumpit_func dumpit;
6544 u32 min_dump_alloc = 0;
6546 link = rtnl_get_link(family, type);
6547 if (!link || !link->dumpit) {
6549 link = rtnl_get_link(family, type);
6550 if (!link || !link->dumpit)
6553 owner = link->owner;
6554 dumpit = link->dumpit;
6556 if (type == RTM_GETLINK - RTM_BASE)
6557 min_dump_alloc = rtnl_calcit(skb, nlh);
6560 /* need to do this before rcu_read_unlock() */
6561 if (!try_module_get(owner))
6562 err = -EPROTONOSUPPORT;
6568 struct netlink_dump_control c = {
6570 .min_dump_alloc = min_dump_alloc,
6573 err = netlink_dump_start(rtnl, skb, nlh, &c);
6574 /* netlink_dump_start() will keep a reference on
6575 * module if dump is still in progress.
6582 link = rtnl_get_link(family, type);
6583 if (!link || !link->doit) {
6585 link = rtnl_get_link(PF_UNSPEC, type);
6586 if (!link || !link->doit)
6590 owner = link->owner;
6591 if (!try_module_get(owner)) {
6592 err = -EPROTONOSUPPORT;
6596 flags = link->flags;
6597 if (kind == RTNL_KIND_DEL && (nlh->nlmsg_flags & NLM_F_BULK) &&
6598 !(flags & RTNL_FLAG_BULK_DEL_SUPPORTED)) {
6599 NL_SET_ERR_MSG(extack, "Bulk delete is not supported");
6604 if (flags & RTNL_FLAG_DOIT_UNLOCKED) {
6608 err = doit(skb, nlh, extack);
6615 link = rtnl_get_link(family, type);
6616 if (link && link->doit)
6617 err = link->doit(skb, nlh, extack);
6633 static void rtnetlink_rcv(struct sk_buff *skb)
6635 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
6638 static int rtnetlink_bind(struct net *net, int group)
6641 case RTNLGRP_IPV4_MROUTE_R:
6642 case RTNLGRP_IPV6_MROUTE_R:
6643 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
6650 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
6652 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
6656 case NETDEV_CHANGEMTU:
6657 case NETDEV_CHANGEADDR:
6658 case NETDEV_CHANGENAME:
6659 case NETDEV_FEAT_CHANGE:
6660 case NETDEV_BONDING_FAILOVER:
6661 case NETDEV_POST_TYPE_CHANGE:
6662 case NETDEV_NOTIFY_PEERS:
6663 case NETDEV_CHANGEUPPER:
6664 case NETDEV_RESEND_IGMP:
6665 case NETDEV_CHANGEINFODATA:
6666 case NETDEV_CHANGELOWERSTATE:
6667 case NETDEV_CHANGE_TX_QUEUE_LEN:
6668 rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event),
6669 GFP_KERNEL, NULL, 0, 0, NULL);
6677 static struct notifier_block rtnetlink_dev_notifier = {
6678 .notifier_call = rtnetlink_event,
6682 static int __net_init rtnetlink_net_init(struct net *net)
6685 struct netlink_kernel_cfg cfg = {
6686 .groups = RTNLGRP_MAX,
6687 .input = rtnetlink_rcv,
6688 .cb_mutex = &rtnl_mutex,
6689 .flags = NL_CFG_F_NONROOT_RECV,
6690 .bind = rtnetlink_bind,
6693 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
6700 static void __net_exit rtnetlink_net_exit(struct net *net)
6702 netlink_kernel_release(net->rtnl);
6706 static struct pernet_operations rtnetlink_net_ops = {
6707 .init = rtnetlink_net_init,
6708 .exit = rtnetlink_net_exit,
6711 void __init rtnetlink_init(void)
6713 if (register_pernet_subsys(&rtnetlink_net_ops))
6714 panic("rtnetlink_init: cannot initialize rtnetlink\n");
6716 register_netdevice_notifier(&rtnetlink_dev_notifier);
6718 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
6719 rtnl_dump_ifinfo, 0);
6720 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, 0);
6721 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, 0);
6722 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, 0);
6724 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, 0);
6725 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, 0);
6726 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, 0);
6728 rtnl_register(PF_UNSPEC, RTM_NEWLINKPROP, rtnl_newlinkprop, NULL, 0);
6729 rtnl_register(PF_UNSPEC, RTM_DELLINKPROP, rtnl_dellinkprop, NULL, 0);
6731 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0);
6732 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL,
6733 RTNL_FLAG_BULK_DEL_SUPPORTED);
6734 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, rtnl_fdb_get, rtnl_fdb_dump, 0);
6736 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, 0);
6737 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, 0);
6738 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, 0);
6740 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
6742 rtnl_register(PF_UNSPEC, RTM_SETSTATS, rtnl_stats_set, NULL, 0);
6744 rtnl_register(PF_BRIDGE, RTM_GETMDB, rtnl_mdb_get, rtnl_mdb_dump, 0);
6745 rtnl_register(PF_BRIDGE, RTM_NEWMDB, rtnl_mdb_add, NULL, 0);
6746 rtnl_register(PF_BRIDGE, RTM_DELMDB, rtnl_mdb_del, NULL,
6747 RTNL_FLAG_BULK_DEL_SUPPORTED);