2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Routing netlink socket interface: protocol independent part.
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
19 #include <linux/errno.h>
20 #include <linux/module.h>
21 #include <linux/types.h>
22 #include <linux/socket.h>
23 #include <linux/kernel.h>
24 #include <linux/timer.h>
25 #include <linux/string.h>
26 #include <linux/sockios.h>
27 #include <linux/net.h>
28 #include <linux/fcntl.h>
30 #include <linux/slab.h>
31 #include <linux/interrupt.h>
32 #include <linux/capability.h>
33 #include <linux/skbuff.h>
34 #include <linux/init.h>
35 #include <linux/security.h>
36 #include <linux/mutex.h>
37 #include <linux/if_addr.h>
38 #include <linux/if_bridge.h>
39 #include <linux/if_vlan.h>
40 #include <linux/pci.h>
41 #include <linux/etherdevice.h>
43 #include <linux/uaccess.h>
45 #include <linux/inet.h>
46 #include <linux/netdevice.h>
47 #include <net/switchdev.h>
49 #include <net/protocol.h>
51 #include <net/route.h>
55 #include <net/pkt_sched.h>
56 #include <net/fib_rules.h>
57 #include <net/rtnetlink.h>
58 #include <net/net_namespace.h>
62 rtnl_dumpit_func dumpit;
63 rtnl_calcit_func calcit;
66 static DEFINE_MUTEX(rtnl_mutex);
70 mutex_lock(&rtnl_mutex);
72 EXPORT_SYMBOL(rtnl_lock);
74 static struct sk_buff *defer_kfree_skb_list;
75 void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
78 tail->next = defer_kfree_skb_list;
79 defer_kfree_skb_list = head;
82 EXPORT_SYMBOL(rtnl_kfree_skbs);
84 void __rtnl_unlock(void)
86 struct sk_buff *head = defer_kfree_skb_list;
88 defer_kfree_skb_list = NULL;
90 mutex_unlock(&rtnl_mutex);
93 struct sk_buff *next = head->next;
101 void rtnl_unlock(void)
103 /* This fellow will unlock it for us. */
106 EXPORT_SYMBOL(rtnl_unlock);
108 int rtnl_trylock(void)
110 return mutex_trylock(&rtnl_mutex);
112 EXPORT_SYMBOL(rtnl_trylock);
114 int rtnl_is_locked(void)
116 return mutex_is_locked(&rtnl_mutex);
118 EXPORT_SYMBOL(rtnl_is_locked);
120 #ifdef CONFIG_PROVE_LOCKING
121 bool lockdep_rtnl_is_held(void)
123 return lockdep_is_held(&rtnl_mutex);
125 EXPORT_SYMBOL(lockdep_rtnl_is_held);
126 #endif /* #ifdef CONFIG_PROVE_LOCKING */
128 static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
130 static inline int rtm_msgindex(int msgtype)
132 int msgindex = msgtype - RTM_BASE;
135 * msgindex < 0 implies someone tried to register a netlink
136 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
137 * the message type has not been added to linux/rtnetlink.h
139 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
144 static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
146 struct rtnl_link *tab;
148 if (protocol <= RTNL_FAMILY_MAX)
149 tab = rtnl_msg_handlers[protocol];
153 if (tab == NULL || tab[msgindex].doit == NULL)
154 tab = rtnl_msg_handlers[PF_UNSPEC];
156 return tab[msgindex].doit;
159 static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
161 struct rtnl_link *tab;
163 if (protocol <= RTNL_FAMILY_MAX)
164 tab = rtnl_msg_handlers[protocol];
168 if (tab == NULL || tab[msgindex].dumpit == NULL)
169 tab = rtnl_msg_handlers[PF_UNSPEC];
171 return tab[msgindex].dumpit;
174 static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
176 struct rtnl_link *tab;
178 if (protocol <= RTNL_FAMILY_MAX)
179 tab = rtnl_msg_handlers[protocol];
183 if (tab == NULL || tab[msgindex].calcit == NULL)
184 tab = rtnl_msg_handlers[PF_UNSPEC];
186 return tab[msgindex].calcit;
190 * __rtnl_register - Register a rtnetlink message type
191 * @protocol: Protocol family or PF_UNSPEC
192 * @msgtype: rtnetlink message type
193 * @doit: Function pointer called for each request message
194 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
195 * @calcit: Function pointer to calc size of dump message
197 * Registers the specified function pointers (at least one of them has
198 * to be non-NULL) to be called whenever a request message for the
199 * specified protocol family and message type is received.
201 * The special protocol family PF_UNSPEC may be used to define fallback
202 * function pointers for the case when no entry for the specific protocol
205 * Returns 0 on success or a negative error code.
207 int __rtnl_register(int protocol, int msgtype,
208 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
209 rtnl_calcit_func calcit)
211 struct rtnl_link *tab;
214 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
215 msgindex = rtm_msgindex(msgtype);
217 tab = rtnl_msg_handlers[protocol];
219 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
223 rtnl_msg_handlers[protocol] = tab;
227 tab[msgindex].doit = doit;
230 tab[msgindex].dumpit = dumpit;
233 tab[msgindex].calcit = calcit;
237 EXPORT_SYMBOL_GPL(__rtnl_register);
240 * rtnl_register - Register a rtnetlink message type
242 * Identical to __rtnl_register() but panics on failure. This is useful
243 * as failure of this function is very unlikely, it can only happen due
244 * to lack of memory when allocating the chain to store all message
245 * handlers for a protocol. Meant for use in init functions where lack
246 * of memory implies no sense in continuing.
248 void rtnl_register(int protocol, int msgtype,
249 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
250 rtnl_calcit_func calcit)
252 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
253 panic("Unable to register rtnetlink message handler, "
254 "protocol = %d, message type = %d\n",
257 EXPORT_SYMBOL_GPL(rtnl_register);
260 * rtnl_unregister - Unregister a rtnetlink message type
261 * @protocol: Protocol family or PF_UNSPEC
262 * @msgtype: rtnetlink message type
264 * Returns 0 on success or a negative error code.
266 int rtnl_unregister(int protocol, int msgtype)
270 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
271 msgindex = rtm_msgindex(msgtype);
273 if (rtnl_msg_handlers[protocol] == NULL)
276 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
277 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
278 rtnl_msg_handlers[protocol][msgindex].calcit = NULL;
282 EXPORT_SYMBOL_GPL(rtnl_unregister);
285 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
286 * @protocol : Protocol family or PF_UNSPEC
288 * Identical to calling rtnl_unregster() for all registered message types
289 * of a certain protocol family.
291 void rtnl_unregister_all(int protocol)
293 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
295 kfree(rtnl_msg_handlers[protocol]);
296 rtnl_msg_handlers[protocol] = NULL;
298 EXPORT_SYMBOL_GPL(rtnl_unregister_all);
300 static LIST_HEAD(link_ops);
302 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
304 const struct rtnl_link_ops *ops;
306 list_for_each_entry(ops, &link_ops, list) {
307 if (!strcmp(ops->kind, kind))
314 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
315 * @ops: struct rtnl_link_ops * to register
317 * The caller must hold the rtnl_mutex. This function should be used
318 * by drivers that create devices during module initialization. It
319 * must be called before registering the devices.
321 * Returns 0 on success or a negative error code.
323 int __rtnl_link_register(struct rtnl_link_ops *ops)
325 if (rtnl_link_ops_get(ops->kind))
328 /* The check for setup is here because if ops
329 * does not have that filled up, it is not possible
330 * to use the ops for creating device. So do not
331 * fill up dellink as well. That disables rtnl_dellink.
333 if (ops->setup && !ops->dellink)
334 ops->dellink = unregister_netdevice_queue;
336 list_add_tail(&ops->list, &link_ops);
339 EXPORT_SYMBOL_GPL(__rtnl_link_register);
342 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
343 * @ops: struct rtnl_link_ops * to register
345 * Returns 0 on success or a negative error code.
347 int rtnl_link_register(struct rtnl_link_ops *ops)
352 err = __rtnl_link_register(ops);
356 EXPORT_SYMBOL_GPL(rtnl_link_register);
358 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
360 struct net_device *dev;
361 LIST_HEAD(list_kill);
363 for_each_netdev(net, dev) {
364 if (dev->rtnl_link_ops == ops)
365 ops->dellink(dev, &list_kill);
367 unregister_netdevice_many(&list_kill);
371 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
372 * @ops: struct rtnl_link_ops * to unregister
374 * The caller must hold the rtnl_mutex.
376 void __rtnl_link_unregister(struct rtnl_link_ops *ops)
381 __rtnl_kill_links(net, ops);
383 list_del(&ops->list);
385 EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
387 /* Return with the rtnl_lock held when there are no network
388 * devices unregistering in any network namespace.
390 static void rtnl_lock_unregistering_all(void)
394 DEFINE_WAIT_FUNC(wait, woken_wake_function);
396 add_wait_queue(&netdev_unregistering_wq, &wait);
398 unregistering = false;
401 if (net->dev_unreg_count > 0) {
402 unregistering = true;
410 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
412 remove_wait_queue(&netdev_unregistering_wq, &wait);
416 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
417 * @ops: struct rtnl_link_ops * to unregister
419 void rtnl_link_unregister(struct rtnl_link_ops *ops)
421 /* Close the race with cleanup_net() */
422 mutex_lock(&net_mutex);
423 rtnl_lock_unregistering_all();
424 __rtnl_link_unregister(ops);
426 mutex_unlock(&net_mutex);
428 EXPORT_SYMBOL_GPL(rtnl_link_unregister);
430 static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
432 struct net_device *master_dev;
433 const struct rtnl_link_ops *ops;
435 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
438 ops = master_dev->rtnl_link_ops;
439 if (!ops || !ops->get_slave_size)
441 /* IFLA_INFO_SLAVE_DATA + nested data */
442 return nla_total_size(sizeof(struct nlattr)) +
443 ops->get_slave_size(master_dev, dev);
446 static size_t rtnl_link_get_size(const struct net_device *dev)
448 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
454 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
455 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
458 /* IFLA_INFO_DATA + nested data */
459 size += nla_total_size(sizeof(struct nlattr)) +
462 if (ops->get_xstats_size)
463 /* IFLA_INFO_XSTATS */
464 size += nla_total_size(ops->get_xstats_size(dev));
466 size += rtnl_link_get_slave_info_data_size(dev);
471 static LIST_HEAD(rtnl_af_ops);
473 static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
475 const struct rtnl_af_ops *ops;
477 list_for_each_entry(ops, &rtnl_af_ops, list) {
478 if (ops->family == family)
486 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
487 * @ops: struct rtnl_af_ops * to register
489 * Returns 0 on success or a negative error code.
491 void rtnl_af_register(struct rtnl_af_ops *ops)
494 list_add_tail(&ops->list, &rtnl_af_ops);
497 EXPORT_SYMBOL_GPL(rtnl_af_register);
500 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
501 * @ops: struct rtnl_af_ops * to unregister
503 * The caller must hold the rtnl_mutex.
505 void __rtnl_af_unregister(struct rtnl_af_ops *ops)
507 list_del(&ops->list);
509 EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
512 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
513 * @ops: struct rtnl_af_ops * to unregister
515 void rtnl_af_unregister(struct rtnl_af_ops *ops)
518 __rtnl_af_unregister(ops);
521 EXPORT_SYMBOL_GPL(rtnl_af_unregister);
523 static size_t rtnl_link_get_af_size(const struct net_device *dev,
526 struct rtnl_af_ops *af_ops;
530 size = nla_total_size(sizeof(struct nlattr));
532 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
533 if (af_ops->get_link_af_size) {
534 /* AF_* + nested data */
535 size += nla_total_size(sizeof(struct nlattr)) +
536 af_ops->get_link_af_size(dev, ext_filter_mask);
543 static bool rtnl_have_link_slave_info(const struct net_device *dev)
545 struct net_device *master_dev;
547 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
548 if (master_dev && master_dev->rtnl_link_ops)
553 static int rtnl_link_slave_info_fill(struct sk_buff *skb,
554 const struct net_device *dev)
556 struct net_device *master_dev;
557 const struct rtnl_link_ops *ops;
558 struct nlattr *slave_data;
561 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
564 ops = master_dev->rtnl_link_ops;
567 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
569 if (ops->fill_slave_info) {
570 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
573 err = ops->fill_slave_info(skb, master_dev, dev);
575 goto err_cancel_slave_data;
576 nla_nest_end(skb, slave_data);
580 err_cancel_slave_data:
581 nla_nest_cancel(skb, slave_data);
585 static int rtnl_link_info_fill(struct sk_buff *skb,
586 const struct net_device *dev)
588 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
594 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
596 if (ops->fill_xstats) {
597 err = ops->fill_xstats(skb, dev);
601 if (ops->fill_info) {
602 data = nla_nest_start(skb, IFLA_INFO_DATA);
605 err = ops->fill_info(skb, dev);
607 goto err_cancel_data;
608 nla_nest_end(skb, data);
613 nla_nest_cancel(skb, data);
617 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
619 struct nlattr *linkinfo;
622 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
623 if (linkinfo == NULL)
626 err = rtnl_link_info_fill(skb, dev);
628 goto err_cancel_link;
630 err = rtnl_link_slave_info_fill(skb, dev);
632 goto err_cancel_link;
634 nla_nest_end(skb, linkinfo);
638 nla_nest_cancel(skb, linkinfo);
643 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
645 struct sock *rtnl = net->rtnl;
648 NETLINK_CB(skb).dst_group = group;
650 atomic_inc(&skb->users);
651 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
653 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
657 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
659 struct sock *rtnl = net->rtnl;
661 return nlmsg_unicast(rtnl, skb, pid);
663 EXPORT_SYMBOL(rtnl_unicast);
665 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
666 struct nlmsghdr *nlh, gfp_t flags)
668 struct sock *rtnl = net->rtnl;
672 report = nlmsg_report(nlh);
674 nlmsg_notify(rtnl, skb, pid, group, report, flags);
676 EXPORT_SYMBOL(rtnl_notify);
678 void rtnl_set_sk_err(struct net *net, u32 group, int error)
680 struct sock *rtnl = net->rtnl;
682 netlink_set_err(rtnl, 0, group, error);
684 EXPORT_SYMBOL(rtnl_set_sk_err);
686 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
691 mx = nla_nest_start(skb, RTA_METRICS);
695 for (i = 0; i < RTAX_MAX; i++) {
697 if (i == RTAX_CC_ALGO - 1) {
698 char tmp[TCP_CA_NAME_MAX], *name;
700 name = tcp_ca_get_name_by_key(metrics[i], tmp);
703 if (nla_put_string(skb, i + 1, name))
704 goto nla_put_failure;
705 } else if (i == RTAX_FEATURES - 1) {
706 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
710 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
711 if (nla_put_u32(skb, i + 1, user_features))
712 goto nla_put_failure;
714 if (nla_put_u32(skb, i + 1, metrics[i]))
715 goto nla_put_failure;
722 nla_nest_cancel(skb, mx);
726 return nla_nest_end(skb, mx);
729 nla_nest_cancel(skb, mx);
732 EXPORT_SYMBOL(rtnetlink_put_metrics);
734 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
735 long expires, u32 error)
737 struct rta_cacheinfo ci = {
738 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
739 .rta_used = dst->__use,
740 .rta_clntref = atomic_read(&(dst->__refcnt)),
748 clock = jiffies_to_clock_t(abs(expires));
749 clock = min_t(unsigned long, clock, INT_MAX);
750 ci.rta_expires = (expires > 0) ? clock : -clock;
752 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
754 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
756 static void set_operstate(struct net_device *dev, unsigned char transition)
758 unsigned char operstate = dev->operstate;
760 switch (transition) {
762 if ((operstate == IF_OPER_DORMANT ||
763 operstate == IF_OPER_UNKNOWN) &&
765 operstate = IF_OPER_UP;
768 case IF_OPER_DORMANT:
769 if (operstate == IF_OPER_UP ||
770 operstate == IF_OPER_UNKNOWN)
771 operstate = IF_OPER_DORMANT;
775 if (dev->operstate != operstate) {
776 write_lock_bh(&dev_base_lock);
777 dev->operstate = operstate;
778 write_unlock_bh(&dev_base_lock);
779 netdev_state_change(dev);
783 static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
785 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
786 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
789 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
790 const struct ifinfomsg *ifm)
792 unsigned int flags = ifm->ifi_flags;
794 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
796 flags = (flags & ifm->ifi_change) |
797 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
802 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
803 const struct rtnl_link_stats64 *b)
805 a->rx_packets = b->rx_packets;
806 a->tx_packets = b->tx_packets;
807 a->rx_bytes = b->rx_bytes;
808 a->tx_bytes = b->tx_bytes;
809 a->rx_errors = b->rx_errors;
810 a->tx_errors = b->tx_errors;
811 a->rx_dropped = b->rx_dropped;
812 a->tx_dropped = b->tx_dropped;
814 a->multicast = b->multicast;
815 a->collisions = b->collisions;
817 a->rx_length_errors = b->rx_length_errors;
818 a->rx_over_errors = b->rx_over_errors;
819 a->rx_crc_errors = b->rx_crc_errors;
820 a->rx_frame_errors = b->rx_frame_errors;
821 a->rx_fifo_errors = b->rx_fifo_errors;
822 a->rx_missed_errors = b->rx_missed_errors;
824 a->tx_aborted_errors = b->tx_aborted_errors;
825 a->tx_carrier_errors = b->tx_carrier_errors;
826 a->tx_fifo_errors = b->tx_fifo_errors;
827 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
828 a->tx_window_errors = b->tx_window_errors;
830 a->rx_compressed = b->rx_compressed;
831 a->tx_compressed = b->tx_compressed;
833 a->rx_nohandler = b->rx_nohandler;
837 static inline int rtnl_vfinfo_size(const struct net_device *dev,
840 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) {
841 int num_vfs = dev_num_vf(dev->dev.parent);
842 size_t size = nla_total_size(0);
845 nla_total_size(sizeof(struct ifla_vf_mac)) +
846 nla_total_size(sizeof(struct ifla_vf_vlan)) +
847 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */
848 nla_total_size(MAX_VLAN_LIST_LEN *
849 sizeof(struct ifla_vf_vlan_info)) +
850 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
851 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
852 nla_total_size(sizeof(struct ifla_vf_rate)) +
853 nla_total_size(sizeof(struct ifla_vf_link_state)) +
854 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
855 nla_total_size(0) + /* nest IFLA_VF_STATS */
856 /* IFLA_VF_STATS_RX_PACKETS */
857 nla_total_size_64bit(sizeof(__u64)) +
858 /* IFLA_VF_STATS_TX_PACKETS */
859 nla_total_size_64bit(sizeof(__u64)) +
860 /* IFLA_VF_STATS_RX_BYTES */
861 nla_total_size_64bit(sizeof(__u64)) +
862 /* IFLA_VF_STATS_TX_BYTES */
863 nla_total_size_64bit(sizeof(__u64)) +
864 /* IFLA_VF_STATS_BROADCAST */
865 nla_total_size_64bit(sizeof(__u64)) +
866 /* IFLA_VF_STATS_MULTICAST */
867 nla_total_size_64bit(sizeof(__u64)) +
868 nla_total_size(sizeof(struct ifla_vf_trust)));
874 static size_t rtnl_port_size(const struct net_device *dev,
877 size_t port_size = nla_total_size(4) /* PORT_VF */
878 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
879 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
880 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
881 + nla_total_size(1) /* PROT_VDP_REQUEST */
882 + nla_total_size(2); /* PORT_VDP_RESPONSE */
883 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
884 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
886 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
889 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
890 !(ext_filter_mask & RTEXT_FILTER_VF))
892 if (dev_num_vf(dev->dev.parent))
893 return port_self_size + vf_ports_size +
894 vf_port_size * dev_num_vf(dev->dev.parent);
896 return port_self_size;
899 static size_t rtnl_xdp_size(const struct net_device *dev)
901 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */
902 nla_total_size(1); /* XDP_ATTACHED */
904 if (!dev->netdev_ops->ndo_xdp)
910 static noinline size_t if_nlmsg_size(const struct net_device *dev,
913 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
914 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
915 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
916 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
917 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
918 + nla_total_size(sizeof(struct rtnl_link_stats))
919 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
920 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
921 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
922 + nla_total_size(4) /* IFLA_TXQLEN */
923 + nla_total_size(4) /* IFLA_WEIGHT */
924 + nla_total_size(4) /* IFLA_MTU */
925 + nla_total_size(4) /* IFLA_LINK */
926 + nla_total_size(4) /* IFLA_MASTER */
927 + nla_total_size(1) /* IFLA_CARRIER */
928 + nla_total_size(4) /* IFLA_PROMISCUITY */
929 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
930 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
931 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
932 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
933 + nla_total_size(1) /* IFLA_OPERSTATE */
934 + nla_total_size(1) /* IFLA_LINKMODE */
935 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
936 + nla_total_size(4) /* IFLA_LINK_NETNSID */
937 + nla_total_size(ext_filter_mask
938 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
939 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
940 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
941 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
942 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
943 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
944 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
945 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
946 + rtnl_xdp_size(dev) /* IFLA_XDP */
947 + nla_total_size(1); /* IFLA_PROTO_DOWN */
951 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
953 struct nlattr *vf_ports;
954 struct nlattr *vf_port;
958 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
962 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
963 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
965 goto nla_put_failure;
966 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
967 goto nla_put_failure;
968 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
969 if (err == -EMSGSIZE)
970 goto nla_put_failure;
972 nla_nest_cancel(skb, vf_port);
975 nla_nest_end(skb, vf_port);
978 nla_nest_end(skb, vf_ports);
983 nla_nest_cancel(skb, vf_ports);
987 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
989 struct nlattr *port_self;
992 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
996 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
998 nla_nest_cancel(skb, port_self);
999 return (err == -EMSGSIZE) ? err : 0;
1002 nla_nest_end(skb, port_self);
1007 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1008 u32 ext_filter_mask)
1012 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1013 !(ext_filter_mask & RTEXT_FILTER_VF))
1016 err = rtnl_port_self_fill(skb, dev);
1020 if (dev_num_vf(dev->dev.parent)) {
1021 err = rtnl_vf_ports_fill(skb, dev);
1029 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1032 struct netdev_phys_item_id ppid;
1034 err = dev_get_phys_port_id(dev, &ppid);
1036 if (err == -EOPNOTSUPP)
1041 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1047 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1049 char name[IFNAMSIZ];
1052 err = dev_get_phys_port_name(dev, name, sizeof(name));
1054 if (err == -EOPNOTSUPP)
1059 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name))
1065 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1068 struct switchdev_attr attr = {
1070 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
1071 .flags = SWITCHDEV_F_NO_RECURSE,
1074 err = switchdev_port_attr_get(dev, &attr);
1076 if (err == -EOPNOTSUPP)
1081 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1088 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1089 struct net_device *dev)
1091 struct rtnl_link_stats64 *sp;
1092 struct nlattr *attr;
1094 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1095 sizeof(struct rtnl_link_stats64), IFLA_PAD);
1099 sp = nla_data(attr);
1100 dev_get_stats(dev, sp);
1102 attr = nla_reserve(skb, IFLA_STATS,
1103 sizeof(struct rtnl_link_stats));
1107 copy_rtnl_link_stats(nla_data(attr), sp);
1112 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1113 struct net_device *dev,
1115 struct nlattr *vfinfo)
1117 struct ifla_vf_rss_query_en vf_rss_query_en;
1118 struct nlattr *vf, *vfstats, *vfvlanlist;
1119 struct ifla_vf_link_state vf_linkstate;
1120 struct ifla_vf_vlan_info vf_vlan_info;
1121 struct ifla_vf_spoofchk vf_spoofchk;
1122 struct ifla_vf_tx_rate vf_tx_rate;
1123 struct ifla_vf_stats vf_stats;
1124 struct ifla_vf_trust vf_trust;
1125 struct ifla_vf_vlan vf_vlan;
1126 struct ifla_vf_rate vf_rate;
1127 struct ifla_vf_mac vf_mac;
1128 struct ifla_vf_info ivi;
1130 /* Not all SR-IOV capable drivers support the
1131 * spoofcheck and "RSS query enable" query. Preset to
1132 * -1 so the user space tool can detect that the driver
1133 * didn't report anything.
1136 ivi.rss_query_en = -1;
1138 memset(ivi.mac, 0, sizeof(ivi.mac));
1139 /* The default value for VF link state is "auto"
1140 * IFLA_VF_LINK_STATE_AUTO which equals zero
1143 /* VLAN Protocol by default is 802.1Q */
1144 ivi.vlan_proto = htons(ETH_P_8021Q);
1145 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1148 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
1157 vf_rss_query_en.vf =
1158 vf_trust.vf = ivi.vf;
1160 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1161 vf_vlan.vlan = ivi.vlan;
1162 vf_vlan.qos = ivi.qos;
1163 vf_vlan_info.vlan = ivi.vlan;
1164 vf_vlan_info.qos = ivi.qos;
1165 vf_vlan_info.vlan_proto = ivi.vlan_proto;
1166 vf_tx_rate.rate = ivi.max_tx_rate;
1167 vf_rate.min_tx_rate = ivi.min_tx_rate;
1168 vf_rate.max_tx_rate = ivi.max_tx_rate;
1169 vf_spoofchk.setting = ivi.spoofchk;
1170 vf_linkstate.link_state = ivi.linkstate;
1171 vf_rss_query_en.setting = ivi.rss_query_en;
1172 vf_trust.setting = ivi.trusted;
1173 vf = nla_nest_start(skb, IFLA_VF_INFO);
1175 goto nla_put_vfinfo_failure;
1176 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1177 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1178 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1180 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1182 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1184 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1186 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1187 sizeof(vf_rss_query_en),
1188 &vf_rss_query_en) ||
1189 nla_put(skb, IFLA_VF_TRUST,
1190 sizeof(vf_trust), &vf_trust))
1191 goto nla_put_vf_failure;
1192 vfvlanlist = nla_nest_start(skb, IFLA_VF_VLAN_LIST);
1194 goto nla_put_vf_failure;
1195 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1197 nla_nest_cancel(skb, vfvlanlist);
1198 goto nla_put_vf_failure;
1200 nla_nest_end(skb, vfvlanlist);
1201 memset(&vf_stats, 0, sizeof(vf_stats));
1202 if (dev->netdev_ops->ndo_get_vf_stats)
1203 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1205 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1207 goto nla_put_vf_failure;
1208 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1209 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1210 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1211 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1212 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1213 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1214 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1215 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1216 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1217 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1218 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
1219 vf_stats.multicast, IFLA_VF_STATS_PAD)) {
1220 nla_nest_cancel(skb, vfstats);
1221 goto nla_put_vf_failure;
1223 nla_nest_end(skb, vfstats);
1224 nla_nest_end(skb, vf);
1228 nla_nest_cancel(skb, vf);
1229 nla_put_vfinfo_failure:
1230 nla_nest_cancel(skb, vfinfo);
1234 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1236 struct rtnl_link_ifmap map;
1238 memset(&map, 0, sizeof(map));
1239 map.mem_start = dev->mem_start;
1240 map.mem_end = dev->mem_end;
1241 map.base_addr = dev->base_addr;
1244 map.port = dev->if_port;
1246 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
1252 static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1254 struct netdev_xdp xdp_op = {};
1258 if (!dev->netdev_ops->ndo_xdp)
1260 xdp = nla_nest_start(skb, IFLA_XDP);
1263 xdp_op.command = XDP_QUERY_PROG;
1264 err = dev->netdev_ops->ndo_xdp(dev, &xdp_op);
1267 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, xdp_op.prog_attached);
1271 nla_nest_end(skb, xdp);
1275 nla_nest_cancel(skb, xdp);
1279 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
1280 int type, u32 pid, u32 seq, u32 change,
1281 unsigned int flags, u32 ext_filter_mask)
1283 struct ifinfomsg *ifm;
1284 struct nlmsghdr *nlh;
1285 struct nlattr *af_spec;
1286 struct rtnl_af_ops *af_ops;
1287 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1290 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1294 ifm = nlmsg_data(nlh);
1295 ifm->ifi_family = AF_UNSPEC;
1297 ifm->ifi_type = dev->type;
1298 ifm->ifi_index = dev->ifindex;
1299 ifm->ifi_flags = dev_get_flags(dev);
1300 ifm->ifi_change = change;
1302 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1303 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1304 nla_put_u8(skb, IFLA_OPERSTATE,
1305 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1306 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1307 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1308 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1309 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
1310 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1311 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1312 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1314 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1316 (dev->ifindex != dev_get_iflink(dev) &&
1317 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
1319 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
1320 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1322 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1324 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1325 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1326 atomic_read(&dev->carrier_changes)) ||
1327 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
1328 goto nla_put_failure;
1330 if (rtnl_fill_link_ifmap(skb, dev))
1331 goto nla_put_failure;
1333 if (dev->addr_len) {
1334 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1335 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1336 goto nla_put_failure;
1339 if (rtnl_phys_port_id_fill(skb, dev))
1340 goto nla_put_failure;
1342 if (rtnl_phys_port_name_fill(skb, dev))
1343 goto nla_put_failure;
1345 if (rtnl_phys_switch_id_fill(skb, dev))
1346 goto nla_put_failure;
1348 if (rtnl_fill_stats(skb, dev))
1349 goto nla_put_failure;
1351 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1352 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1353 goto nla_put_failure;
1355 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
1356 ext_filter_mask & RTEXT_FILTER_VF) {
1358 struct nlattr *vfinfo;
1359 int num_vfs = dev_num_vf(dev->dev.parent);
1361 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1363 goto nla_put_failure;
1364 for (i = 0; i < num_vfs; i++) {
1365 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1366 goto nla_put_failure;
1369 nla_nest_end(skb, vfinfo);
1372 if (rtnl_port_fill(skb, dev, ext_filter_mask))
1373 goto nla_put_failure;
1375 if (rtnl_xdp_fill(skb, dev))
1376 goto nla_put_failure;
1378 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1379 if (rtnl_link_fill(skb, dev) < 0)
1380 goto nla_put_failure;
1383 if (dev->rtnl_link_ops &&
1384 dev->rtnl_link_ops->get_link_net) {
1385 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1387 if (!net_eq(dev_net(dev), link_net)) {
1388 int id = peernet2id_alloc(dev_net(dev), link_net);
1390 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1391 goto nla_put_failure;
1395 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1396 goto nla_put_failure;
1398 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1399 if (af_ops->fill_link_af) {
1403 if (!(af = nla_nest_start(skb, af_ops->family)))
1404 goto nla_put_failure;
1406 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1409 * Caller may return ENODATA to indicate that there
1410 * was no data to be dumped. This is not an error, it
1411 * means we should trim the attribute header and
1414 if (err == -ENODATA)
1415 nla_nest_cancel(skb, af);
1417 goto nla_put_failure;
1419 nla_nest_end(skb, af);
1423 nla_nest_end(skb, af_spec);
1425 nlmsg_end(skb, nlh);
1429 nlmsg_cancel(skb, nlh);
1433 static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1434 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1435 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1436 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1437 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1438 [IFLA_MTU] = { .type = NLA_U32 },
1439 [IFLA_LINK] = { .type = NLA_U32 },
1440 [IFLA_MASTER] = { .type = NLA_U32 },
1441 [IFLA_CARRIER] = { .type = NLA_U8 },
1442 [IFLA_TXQLEN] = { .type = NLA_U32 },
1443 [IFLA_WEIGHT] = { .type = NLA_U32 },
1444 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1445 [IFLA_LINKMODE] = { .type = NLA_U8 },
1446 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1447 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1448 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1449 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1450 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1451 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1452 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1453 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1454 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1455 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1456 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1457 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1458 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1459 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
1460 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1461 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
1462 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
1463 [IFLA_XDP] = { .type = NLA_NESTED },
1466 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1467 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1468 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1469 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1470 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
1473 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1474 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1475 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1476 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
1477 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1478 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1479 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1480 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
1481 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
1482 [IFLA_VF_STATS] = { .type = NLA_NESTED },
1483 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
1484 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1485 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1488 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1489 [IFLA_PORT_VF] = { .type = NLA_U32 },
1490 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1491 .len = PORT_PROFILE_MAX },
1492 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1493 .len = PORT_UUID_MAX },
1494 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1495 .len = PORT_UUID_MAX },
1496 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1497 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1499 /* Unused, but we need to keep it here since user space could
1500 * fill it. It's also broken with regard to NLA_BINARY use in
1501 * combination with structs.
1503 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1504 .len = sizeof(struct ifla_port_vsi) },
1507 static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
1508 [IFLA_XDP_FD] = { .type = NLA_S32 },
1509 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
1510 [IFLA_XDP_FLAGS] = { .type = NLA_U32 },
1513 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1515 const struct rtnl_link_ops *ops = NULL;
1516 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1518 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla,
1519 ifla_info_policy, NULL) < 0)
1522 if (linfo[IFLA_INFO_KIND]) {
1523 char kind[MODULE_NAME_LEN];
1525 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1526 ops = rtnl_link_ops_get(kind);
1532 static bool link_master_filtered(struct net_device *dev, int master_idx)
1534 struct net_device *master;
1539 master = netdev_master_upper_dev_get(dev);
1540 if (!master || master->ifindex != master_idx)
1546 static bool link_kind_filtered(const struct net_device *dev,
1547 const struct rtnl_link_ops *kind_ops)
1549 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1555 static bool link_dump_filtered(struct net_device *dev,
1557 const struct rtnl_link_ops *kind_ops)
1559 if (link_master_filtered(dev, master_idx) ||
1560 link_kind_filtered(dev, kind_ops))
1566 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1568 struct net *net = sock_net(skb->sk);
1571 struct net_device *dev;
1572 struct hlist_head *head;
1573 struct nlattr *tb[IFLA_MAX+1];
1574 u32 ext_filter_mask = 0;
1575 const struct rtnl_link_ops *kind_ops = NULL;
1576 unsigned int flags = NLM_F_MULTI;
1582 s_idx = cb->args[1];
1584 cb->seq = net->dev_base_seq;
1586 /* A hack to preserve kernel<->userspace interface.
1587 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1588 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1589 * what iproute2 < v3.9.0 used.
1590 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1591 * attribute, its netlink message is shorter than struct ifinfomsg.
1593 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1594 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1596 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX,
1597 ifla_policy, NULL) >= 0) {
1598 if (tb[IFLA_EXT_MASK])
1599 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1601 if (tb[IFLA_MASTER])
1602 master_idx = nla_get_u32(tb[IFLA_MASTER]);
1604 if (tb[IFLA_LINKINFO])
1605 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
1607 if (master_idx || kind_ops)
1608 flags |= NLM_F_DUMP_FILTERED;
1611 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1613 head = &net->dev_index_head[h];
1614 hlist_for_each_entry(dev, head, index_hlist) {
1615 if (link_dump_filtered(dev, master_idx, kind_ops))
1619 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1620 NETLINK_CB(cb->skb).portid,
1621 cb->nlh->nlmsg_seq, 0,
1624 /* If we ran out of room on the first message,
1627 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1632 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1644 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
1645 struct netlink_ext_ack *exterr)
1647 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy, exterr);
1649 EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1651 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1654 /* Examine the link attributes and figure out which
1655 * network namespace we are talking about.
1657 if (tb[IFLA_NET_NS_PID])
1658 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1659 else if (tb[IFLA_NET_NS_FD])
1660 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1662 net = get_net(src_net);
1665 EXPORT_SYMBOL(rtnl_link_get_net);
1667 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1670 if (tb[IFLA_ADDRESS] &&
1671 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1674 if (tb[IFLA_BROADCAST] &&
1675 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1679 if (tb[IFLA_AF_SPEC]) {
1683 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1684 const struct rtnl_af_ops *af_ops;
1686 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1687 return -EAFNOSUPPORT;
1689 if (!af_ops->set_link_af)
1692 if (af_ops->validate_link_af) {
1693 err = af_ops->validate_link_af(dev, af);
1703 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
1706 const struct net_device_ops *ops = dev->netdev_ops;
1708 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
1711 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
1713 if (dev->type != ARPHRD_INFINIBAND)
1716 return handle_infiniband_guid(dev, ivt, guid_type);
1719 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
1721 const struct net_device_ops *ops = dev->netdev_ops;
1724 if (tb[IFLA_VF_MAC]) {
1725 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
1728 if (ops->ndo_set_vf_mac)
1729 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1735 if (tb[IFLA_VF_VLAN]) {
1736 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1739 if (ops->ndo_set_vf_vlan)
1740 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1742 htons(ETH_P_8021Q));
1747 if (tb[IFLA_VF_VLAN_LIST]) {
1748 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
1749 struct nlattr *attr;
1753 if (!ops->ndo_set_vf_vlan)
1756 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
1757 if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
1758 nla_len(attr) < NLA_HDRLEN) {
1761 if (len >= MAX_VLAN_LIST_LEN)
1763 ivvl[len] = nla_data(attr);
1770 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
1771 ivvl[0]->qos, ivvl[0]->vlan_proto);
1776 if (tb[IFLA_VF_TX_RATE]) {
1777 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1778 struct ifla_vf_info ivf;
1781 if (ops->ndo_get_vf_config)
1782 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1787 if (ops->ndo_set_vf_rate)
1788 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1795 if (tb[IFLA_VF_RATE]) {
1796 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1799 if (ops->ndo_set_vf_rate)
1800 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1807 if (tb[IFLA_VF_SPOOFCHK]) {
1808 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1811 if (ops->ndo_set_vf_spoofchk)
1812 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1818 if (tb[IFLA_VF_LINK_STATE]) {
1819 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1822 if (ops->ndo_set_vf_link_state)
1823 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1829 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1830 struct ifla_vf_rss_query_en *ivrssq_en;
1833 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1834 if (ops->ndo_set_vf_rss_query_en)
1835 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1836 ivrssq_en->setting);
1841 if (tb[IFLA_VF_TRUST]) {
1842 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1845 if (ops->ndo_set_vf_trust)
1846 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1851 if (tb[IFLA_VF_IB_NODE_GUID]) {
1852 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
1854 if (!ops->ndo_set_vf_guid)
1857 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
1860 if (tb[IFLA_VF_IB_PORT_GUID]) {
1861 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
1863 if (!ops->ndo_set_vf_guid)
1866 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
1872 static int do_set_master(struct net_device *dev, int ifindex)
1874 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1875 const struct net_device_ops *ops;
1879 if (upper_dev->ifindex == ifindex)
1881 ops = upper_dev->netdev_ops;
1882 if (ops->ndo_del_slave) {
1883 err = ops->ndo_del_slave(upper_dev, dev);
1892 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1895 ops = upper_dev->netdev_ops;
1896 if (ops->ndo_add_slave) {
1897 err = ops->ndo_add_slave(upper_dev, dev);
1907 #define DO_SETLINK_MODIFIED 0x01
1908 /* notify flag means notify + modified. */
1909 #define DO_SETLINK_NOTIFY 0x03
1910 static int do_setlink(const struct sk_buff *skb,
1911 struct net_device *dev, struct ifinfomsg *ifm,
1912 struct nlattr **tb, char *ifname, int status)
1914 const struct net_device_ops *ops = dev->netdev_ops;
1917 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
1918 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1923 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
1928 err = dev_change_net_namespace(dev, net, ifname);
1932 status |= DO_SETLINK_MODIFIED;
1936 struct rtnl_link_ifmap *u_map;
1939 if (!ops->ndo_set_config) {
1944 if (!netif_device_present(dev)) {
1949 u_map = nla_data(tb[IFLA_MAP]);
1950 k_map.mem_start = (unsigned long) u_map->mem_start;
1951 k_map.mem_end = (unsigned long) u_map->mem_end;
1952 k_map.base_addr = (unsigned short) u_map->base_addr;
1953 k_map.irq = (unsigned char) u_map->irq;
1954 k_map.dma = (unsigned char) u_map->dma;
1955 k_map.port = (unsigned char) u_map->port;
1957 err = ops->ndo_set_config(dev, &k_map);
1961 status |= DO_SETLINK_NOTIFY;
1964 if (tb[IFLA_ADDRESS]) {
1965 struct sockaddr *sa;
1968 len = sizeof(sa_family_t) + dev->addr_len;
1969 sa = kmalloc(len, GFP_KERNEL);
1974 sa->sa_family = dev->type;
1975 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1977 err = dev_set_mac_address(dev, sa);
1981 status |= DO_SETLINK_MODIFIED;
1985 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1988 status |= DO_SETLINK_MODIFIED;
1991 if (tb[IFLA_GROUP]) {
1992 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1993 status |= DO_SETLINK_NOTIFY;
1997 * Interface selected by interface index but interface
1998 * name provided implies that a name change has been
2001 if (ifm->ifi_index > 0 && ifname[0]) {
2002 err = dev_change_name(dev, ifname);
2005 status |= DO_SETLINK_MODIFIED;
2008 if (tb[IFLA_IFALIAS]) {
2009 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2010 nla_len(tb[IFLA_IFALIAS]));
2013 status |= DO_SETLINK_NOTIFY;
2016 if (tb[IFLA_BROADCAST]) {
2017 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
2018 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
2021 if (ifm->ifi_flags || ifm->ifi_change) {
2022 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2027 if (tb[IFLA_MASTER]) {
2028 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
2031 status |= DO_SETLINK_MODIFIED;
2034 if (tb[IFLA_CARRIER]) {
2035 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2038 status |= DO_SETLINK_MODIFIED;
2041 if (tb[IFLA_TXQLEN]) {
2042 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
2043 unsigned long orig_len = dev->tx_queue_len;
2045 if (dev->tx_queue_len ^ value) {
2046 dev->tx_queue_len = value;
2047 err = call_netdevice_notifiers(
2048 NETDEV_CHANGE_TX_QUEUE_LEN, dev);
2049 err = notifier_to_errno(err);
2051 dev->tx_queue_len = orig_len;
2054 status |= DO_SETLINK_NOTIFY;
2058 if (tb[IFLA_OPERSTATE])
2059 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2061 if (tb[IFLA_LINKMODE]) {
2062 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2064 write_lock_bh(&dev_base_lock);
2065 if (dev->link_mode ^ value)
2066 status |= DO_SETLINK_NOTIFY;
2067 dev->link_mode = value;
2068 write_unlock_bh(&dev_base_lock);
2071 if (tb[IFLA_VFINFO_LIST]) {
2072 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
2073 struct nlattr *attr;
2076 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
2077 if (nla_type(attr) != IFLA_VF_INFO ||
2078 nla_len(attr) < NLA_HDRLEN) {
2082 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
2083 ifla_vf_policy, NULL);
2086 err = do_setvfinfo(dev, vfinfo);
2089 status |= DO_SETLINK_NOTIFY;
2094 if (tb[IFLA_VF_PORTS]) {
2095 struct nlattr *port[IFLA_PORT_MAX+1];
2096 struct nlattr *attr;
2101 if (!ops->ndo_set_vf_port)
2104 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
2105 if (nla_type(attr) != IFLA_VF_PORT ||
2106 nla_len(attr) < NLA_HDRLEN) {
2110 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
2111 ifla_port_policy, NULL);
2114 if (!port[IFLA_PORT_VF]) {
2118 vf = nla_get_u32(port[IFLA_PORT_VF]);
2119 err = ops->ndo_set_vf_port(dev, vf, port);
2122 status |= DO_SETLINK_NOTIFY;
2127 if (tb[IFLA_PORT_SELF]) {
2128 struct nlattr *port[IFLA_PORT_MAX+1];
2130 err = nla_parse_nested(port, IFLA_PORT_MAX,
2131 tb[IFLA_PORT_SELF], ifla_port_policy,
2137 if (ops->ndo_set_vf_port)
2138 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2141 status |= DO_SETLINK_NOTIFY;
2144 if (tb[IFLA_AF_SPEC]) {
2148 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2149 const struct rtnl_af_ops *af_ops;
2151 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
2154 err = af_ops->set_link_af(dev, af);
2158 status |= DO_SETLINK_NOTIFY;
2163 if (tb[IFLA_PROTO_DOWN]) {
2164 err = dev_change_proto_down(dev,
2165 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2168 status |= DO_SETLINK_NOTIFY;
2172 struct nlattr *xdp[IFLA_XDP_MAX + 1];
2175 err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP],
2176 ifla_xdp_policy, NULL);
2180 if (xdp[IFLA_XDP_ATTACHED]) {
2185 if (xdp[IFLA_XDP_FLAGS]) {
2186 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
2187 if (xdp_flags & ~XDP_FLAGS_MASK) {
2193 if (xdp[IFLA_XDP_FD]) {
2194 err = dev_change_xdp_fd(dev,
2195 nla_get_s32(xdp[IFLA_XDP_FD]),
2199 status |= DO_SETLINK_NOTIFY;
2204 if (status & DO_SETLINK_MODIFIED) {
2205 if (status & DO_SETLINK_NOTIFY)
2206 netdev_state_change(dev);
2209 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",
2216 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2217 struct netlink_ext_ack *extack)
2219 struct net *net = sock_net(skb->sk);
2220 struct ifinfomsg *ifm;
2221 struct net_device *dev;
2223 struct nlattr *tb[IFLA_MAX+1];
2224 char ifname[IFNAMSIZ];
2226 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy,
2231 if (tb[IFLA_IFNAME])
2232 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2237 ifm = nlmsg_data(nlh);
2238 if (ifm->ifi_index > 0)
2239 dev = __dev_get_by_index(net, ifm->ifi_index);
2240 else if (tb[IFLA_IFNAME])
2241 dev = __dev_get_by_name(net, ifname);
2250 err = validate_linkmsg(dev, tb);
2254 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
2259 static int rtnl_group_dellink(const struct net *net, int group)
2261 struct net_device *dev, *aux;
2262 LIST_HEAD(list_kill);
2268 for_each_netdev(net, dev) {
2269 if (dev->group == group) {
2270 const struct rtnl_link_ops *ops;
2273 ops = dev->rtnl_link_ops;
2274 if (!ops || !ops->dellink)
2282 for_each_netdev_safe(net, dev, aux) {
2283 if (dev->group == group) {
2284 const struct rtnl_link_ops *ops;
2286 ops = dev->rtnl_link_ops;
2287 ops->dellink(dev, &list_kill);
2290 unregister_netdevice_many(&list_kill);
2295 int rtnl_delete_link(struct net_device *dev)
2297 const struct rtnl_link_ops *ops;
2298 LIST_HEAD(list_kill);
2300 ops = dev->rtnl_link_ops;
2301 if (!ops || !ops->dellink)
2304 ops->dellink(dev, &list_kill);
2305 unregister_netdevice_many(&list_kill);
2309 EXPORT_SYMBOL_GPL(rtnl_delete_link);
2311 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
2312 struct netlink_ext_ack *extack)
2314 struct net *net = sock_net(skb->sk);
2315 struct net_device *dev;
2316 struct ifinfomsg *ifm;
2317 char ifname[IFNAMSIZ];
2318 struct nlattr *tb[IFLA_MAX+1];
2321 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
2325 if (tb[IFLA_IFNAME])
2326 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2328 ifm = nlmsg_data(nlh);
2329 if (ifm->ifi_index > 0)
2330 dev = __dev_get_by_index(net, ifm->ifi_index);
2331 else if (tb[IFLA_IFNAME])
2332 dev = __dev_get_by_name(net, ifname);
2333 else if (tb[IFLA_GROUP])
2334 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
2341 return rtnl_delete_link(dev);
2344 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2346 unsigned int old_flags;
2349 old_flags = dev->flags;
2350 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2351 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2356 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
2358 __dev_notify_flags(dev, old_flags, ~0U);
2361 EXPORT_SYMBOL(rtnl_configure_link);
2363 struct net_device *rtnl_create_link(struct net *net,
2364 const char *ifname, unsigned char name_assign_type,
2365 const struct rtnl_link_ops *ops, struct nlattr *tb[])
2367 struct net_device *dev;
2368 unsigned int num_tx_queues = 1;
2369 unsigned int num_rx_queues = 1;
2371 if (tb[IFLA_NUM_TX_QUEUES])
2372 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2373 else if (ops->get_num_tx_queues)
2374 num_tx_queues = ops->get_num_tx_queues();
2376 if (tb[IFLA_NUM_RX_QUEUES])
2377 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2378 else if (ops->get_num_rx_queues)
2379 num_rx_queues = ops->get_num_rx_queues();
2381 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
2382 ops->setup, num_tx_queues, num_rx_queues);
2384 return ERR_PTR(-ENOMEM);
2386 dev_net_set(dev, net);
2387 dev->rtnl_link_ops = ops;
2388 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
2391 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2392 if (tb[IFLA_ADDRESS]) {
2393 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2394 nla_len(tb[IFLA_ADDRESS]));
2395 dev->addr_assign_type = NET_ADDR_SET;
2397 if (tb[IFLA_BROADCAST])
2398 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2399 nla_len(tb[IFLA_BROADCAST]));
2400 if (tb[IFLA_TXQLEN])
2401 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2402 if (tb[IFLA_OPERSTATE])
2403 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2404 if (tb[IFLA_LINKMODE])
2405 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
2407 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2411 EXPORT_SYMBOL(rtnl_create_link);
2413 static int rtnl_group_changelink(const struct sk_buff *skb,
2414 struct net *net, int group,
2415 struct ifinfomsg *ifm,
2418 struct net_device *dev, *aux;
2421 for_each_netdev_safe(net, dev, aux) {
2422 if (dev->group == group) {
2423 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
2432 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2433 struct netlink_ext_ack *extack)
2435 struct net *net = sock_net(skb->sk);
2436 const struct rtnl_link_ops *ops;
2437 const struct rtnl_link_ops *m_ops = NULL;
2438 struct net_device *dev;
2439 struct net_device *master_dev = NULL;
2440 struct ifinfomsg *ifm;
2441 char kind[MODULE_NAME_LEN];
2442 char ifname[IFNAMSIZ];
2443 struct nlattr *tb[IFLA_MAX+1];
2444 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
2445 unsigned char name_assign_type = NET_NAME_USER;
2448 #ifdef CONFIG_MODULES
2451 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
2455 if (tb[IFLA_IFNAME])
2456 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2460 ifm = nlmsg_data(nlh);
2461 if (ifm->ifi_index > 0)
2462 dev = __dev_get_by_index(net, ifm->ifi_index);
2465 dev = __dev_get_by_name(net, ifname);
2471 master_dev = netdev_master_upper_dev_get(dev);
2473 m_ops = master_dev->rtnl_link_ops;
2476 err = validate_linkmsg(dev, tb);
2480 if (tb[IFLA_LINKINFO]) {
2481 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2482 tb[IFLA_LINKINFO], ifla_info_policy,
2487 memset(linkinfo, 0, sizeof(linkinfo));
2489 if (linkinfo[IFLA_INFO_KIND]) {
2490 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2491 ops = rtnl_link_ops_get(kind);
2498 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2499 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
2500 struct nlattr **data = NULL;
2501 struct nlattr **slave_data = NULL;
2502 struct net *dest_net, *link_net = NULL;
2505 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2506 err = nla_parse_nested(attr, ops->maxtype,
2507 linkinfo[IFLA_INFO_DATA],
2513 if (ops->validate) {
2514 err = ops->validate(tb, data);
2521 if (m_ops->slave_maxtype &&
2522 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2523 err = nla_parse_nested(slave_attr,
2524 m_ops->slave_maxtype,
2525 linkinfo[IFLA_INFO_SLAVE_DATA],
2526 m_ops->slave_policy,
2530 slave_data = slave_attr;
2532 if (m_ops->slave_validate) {
2533 err = m_ops->slave_validate(tb, slave_data);
2542 if (nlh->nlmsg_flags & NLM_F_EXCL)
2544 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2547 if (linkinfo[IFLA_INFO_DATA]) {
2548 if (!ops || ops != dev->rtnl_link_ops ||
2552 err = ops->changelink(dev, tb, data);
2555 status |= DO_SETLINK_NOTIFY;
2558 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2559 if (!m_ops || !m_ops->slave_changelink)
2562 err = m_ops->slave_changelink(master_dev, dev,
2566 status |= DO_SETLINK_NOTIFY;
2569 return do_setlink(skb, dev, ifm, tb, ifname, status);
2572 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2573 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
2574 return rtnl_group_changelink(skb, net,
2575 nla_get_u32(tb[IFLA_GROUP]),
2580 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
2584 #ifdef CONFIG_MODULES
2587 request_module("rtnl-link-%s", kind);
2589 ops = rtnl_link_ops_get(kind);
2601 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
2602 name_assign_type = NET_NAME_ENUM;
2605 dest_net = rtnl_link_get_net(net, tb);
2606 if (IS_ERR(dest_net))
2607 return PTR_ERR(dest_net);
2610 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2613 if (tb[IFLA_LINK_NETNSID]) {
2614 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2616 link_net = get_net_ns_by_id(dest_net, id);
2622 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2626 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2627 name_assign_type, ops, tb);
2633 dev->ifindex = ifm->ifi_index;
2636 err = ops->newlink(link_net ? : net, dev, tb, data);
2637 /* Drivers should call free_netdev() in ->destructor
2638 * and unregister it on failure after registration
2639 * so that device could be finally freed in rtnl_unlock.
2642 /* If device is not registered at all, free it now */
2643 if (dev->reg_state == NETREG_UNINITIALIZED)
2648 err = register_netdevice(dev);
2654 err = rtnl_configure_link(dev, ifm);
2656 goto out_unregister;
2658 err = dev_change_net_namespace(dev, dest_net, ifname);
2660 goto out_unregister;
2662 if (tb[IFLA_MASTER]) {
2663 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
2665 goto out_unregister;
2674 LIST_HEAD(list_kill);
2676 ops->dellink(dev, &list_kill);
2677 unregister_netdevice_many(&list_kill);
2679 unregister_netdevice(dev);
2685 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2686 struct netlink_ext_ack *extack)
2688 struct net *net = sock_net(skb->sk);
2689 struct ifinfomsg *ifm;
2690 char ifname[IFNAMSIZ];
2691 struct nlattr *tb[IFLA_MAX+1];
2692 struct net_device *dev = NULL;
2693 struct sk_buff *nskb;
2695 u32 ext_filter_mask = 0;
2697 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
2701 if (tb[IFLA_IFNAME])
2702 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2704 if (tb[IFLA_EXT_MASK])
2705 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2707 ifm = nlmsg_data(nlh);
2708 if (ifm->ifi_index > 0)
2709 dev = __dev_get_by_index(net, ifm->ifi_index);
2710 else if (tb[IFLA_IFNAME])
2711 dev = __dev_get_by_name(net, ifname);
2718 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
2722 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
2723 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
2725 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2726 WARN_ON(err == -EMSGSIZE);
2729 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
2734 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
2736 struct net *net = sock_net(skb->sk);
2737 struct net_device *dev;
2738 struct nlattr *tb[IFLA_MAX+1];
2739 u32 ext_filter_mask = 0;
2740 u16 min_ifinfo_dump_size = 0;
2743 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2744 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2745 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2747 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
2748 if (tb[IFLA_EXT_MASK])
2749 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2752 if (!ext_filter_mask)
2753 return NLMSG_GOODSIZE;
2755 * traverse the list of net devices and compute the minimum
2756 * buffer size based upon the filter mask.
2758 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2759 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2764 return nlmsg_total_size(min_ifinfo_dump_size);
2767 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
2770 int s_idx = cb->family;
2774 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
2775 int type = cb->nlh->nlmsg_type-RTM_BASE;
2776 if (idx < s_idx || idx == PF_PACKET)
2778 if (rtnl_msg_handlers[idx] == NULL ||
2779 rtnl_msg_handlers[idx][type].dumpit == NULL)
2782 memset(&cb->args[0], 0, sizeof(cb->args));
2786 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
2794 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2795 unsigned int change, gfp_t flags)
2797 struct net *net = dev_net(dev);
2798 struct sk_buff *skb;
2800 size_t if_info_size;
2802 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
2806 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
2808 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2809 WARN_ON(err == -EMSGSIZE);
2816 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2820 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2822 struct net *net = dev_net(dev);
2824 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2827 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2830 struct sk_buff *skb;
2832 if (dev->reg_state != NETREG_REGISTERED)
2835 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2837 rtmsg_ifinfo_send(skb, dev, flags);
2839 EXPORT_SYMBOL(rtmsg_ifinfo);
2841 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2842 struct net_device *dev,
2843 u8 *addr, u16 vid, u32 pid, u32 seq,
2844 int type, unsigned int flags,
2845 int nlflags, u16 ndm_state)
2847 struct nlmsghdr *nlh;
2850 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
2854 ndm = nlmsg_data(nlh);
2855 ndm->ndm_family = AF_BRIDGE;
2858 ndm->ndm_flags = flags;
2860 ndm->ndm_ifindex = dev->ifindex;
2861 ndm->ndm_state = ndm_state;
2863 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2864 goto nla_put_failure;
2866 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2867 goto nla_put_failure;
2869 nlmsg_end(skb, nlh);
2873 nlmsg_cancel(skb, nlh);
2877 static inline size_t rtnl_fdb_nlmsg_size(void)
2879 return NLMSG_ALIGN(sizeof(struct ndmsg)) +
2880 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */
2881 nla_total_size(sizeof(u16)) + /* NDA_VLAN */
2885 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
2888 struct net *net = dev_net(dev);
2889 struct sk_buff *skb;
2892 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2896 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
2897 0, 0, type, NTF_SELF, 0, ndm_state);
2903 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2906 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2910 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2912 int ndo_dflt_fdb_add(struct ndmsg *ndm,
2913 struct nlattr *tb[],
2914 struct net_device *dev,
2915 const unsigned char *addr, u16 vid,
2920 /* If aging addresses are supported device will need to
2921 * implement its own handler for this.
2923 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2924 pr_info("%s: FDB only supports static addresses\n", dev->name);
2929 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2933 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2934 err = dev_uc_add_excl(dev, addr);
2935 else if (is_multicast_ether_addr(addr))
2936 err = dev_mc_add_excl(dev, addr);
2938 /* Only return duplicate errors if NLM_F_EXCL is set */
2939 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2944 EXPORT_SYMBOL(ndo_dflt_fdb_add);
2946 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2951 if (nla_len(vlan_attr) != sizeof(u16)) {
2952 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2956 vid = nla_get_u16(vlan_attr);
2958 if (!vid || vid >= VLAN_VID_MASK) {
2959 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2968 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
2969 struct netlink_ext_ack *extack)
2971 struct net *net = sock_net(skb->sk);
2973 struct nlattr *tb[NDA_MAX+1];
2974 struct net_device *dev;
2979 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
2983 ndm = nlmsg_data(nlh);
2984 if (ndm->ndm_ifindex == 0) {
2985 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2989 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2991 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2995 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2996 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
3000 addr = nla_data(tb[NDA_LLADDR]);
3002 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
3008 /* Support fdb on master device the net/bridge default case */
3009 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3010 (dev->priv_flags & IFF_BRIDGE_PORT)) {
3011 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3012 const struct net_device_ops *ops = br_dev->netdev_ops;
3014 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
3019 ndm->ndm_flags &= ~NTF_MASTER;
3022 /* Embedded bridge, macvlan, and any other device support */
3023 if ((ndm->ndm_flags & NTF_SELF)) {
3024 if (dev->netdev_ops->ndo_fdb_add)
3025 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
3029 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
3033 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
3035 ndm->ndm_flags &= ~NTF_SELF;
3043 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
3045 int ndo_dflt_fdb_del(struct ndmsg *ndm,
3046 struct nlattr *tb[],
3047 struct net_device *dev,
3048 const unsigned char *addr, u16 vid)
3052 /* If aging addresses are supported device will need to
3053 * implement its own handler for this.
3055 if (!(ndm->ndm_state & NUD_PERMANENT)) {
3056 pr_info("%s: FDB only supports static addresses\n", dev->name);
3060 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3061 err = dev_uc_del(dev, addr);
3062 else if (is_multicast_ether_addr(addr))
3063 err = dev_mc_del(dev, addr);
3067 EXPORT_SYMBOL(ndo_dflt_fdb_del);
3069 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
3070 struct netlink_ext_ack *extack)
3072 struct net *net = sock_net(skb->sk);
3074 struct nlattr *tb[NDA_MAX+1];
3075 struct net_device *dev;
3080 if (!netlink_capable(skb, CAP_NET_ADMIN))
3083 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
3087 ndm = nlmsg_data(nlh);
3088 if (ndm->ndm_ifindex == 0) {
3089 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
3093 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3095 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
3099 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3100 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
3104 addr = nla_data(tb[NDA_LLADDR]);
3106 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
3112 /* Support fdb on master device the net/bridge default case */
3113 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3114 (dev->priv_flags & IFF_BRIDGE_PORT)) {
3115 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3116 const struct net_device_ops *ops = br_dev->netdev_ops;
3118 if (ops->ndo_fdb_del)
3119 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
3124 ndm->ndm_flags &= ~NTF_MASTER;
3127 /* Embedded bridge, macvlan, and any other device support */
3128 if (ndm->ndm_flags & NTF_SELF) {
3129 if (dev->netdev_ops->ndo_fdb_del)
3130 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
3133 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
3136 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
3138 ndm->ndm_flags &= ~NTF_SELF;
3145 static int nlmsg_populate_fdb(struct sk_buff *skb,
3146 struct netlink_callback *cb,
3147 struct net_device *dev,
3149 struct netdev_hw_addr_list *list)
3151 struct netdev_hw_addr *ha;
3155 portid = NETLINK_CB(cb->skb).portid;
3156 seq = cb->nlh->nlmsg_seq;
3158 list_for_each_entry(ha, &list->list, list) {
3159 if (*idx < cb->args[2])
3162 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
3164 RTM_NEWNEIGH, NTF_SELF,
3165 NLM_F_MULTI, NUD_PERMANENT);
3175 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
3176 * @nlh: netlink message header
3179 * Default netdevice operation to dump the existing unicast address list.
3180 * Returns number of addresses from list put in skb.
3182 int ndo_dflt_fdb_dump(struct sk_buff *skb,
3183 struct netlink_callback *cb,
3184 struct net_device *dev,
3185 struct net_device *filter_dev,
3190 netif_addr_lock_bh(dev);
3191 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
3194 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
3196 netif_addr_unlock_bh(dev);
3199 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3201 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3203 struct net_device *dev;
3204 struct nlattr *tb[IFLA_MAX+1];
3205 struct net_device *br_dev = NULL;
3206 const struct net_device_ops *ops = NULL;
3207 const struct net_device_ops *cops = NULL;
3208 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3209 struct net *net = sock_net(skb->sk);
3210 struct hlist_head *head;
3218 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb,
3219 IFLA_MAX, ifla_policy, NULL) == 0) {
3220 if (tb[IFLA_MASTER])
3221 br_idx = nla_get_u32(tb[IFLA_MASTER]);
3224 brport_idx = ifm->ifi_index;
3227 br_dev = __dev_get_by_index(net, br_idx);
3231 ops = br_dev->netdev_ops;
3235 s_idx = cb->args[1];
3237 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3239 head = &net->dev_index_head[h];
3240 hlist_for_each_entry(dev, head, index_hlist) {
3242 if (brport_idx && (dev->ifindex != brport_idx))
3245 if (!br_idx) { /* user did not specify a specific bridge */
3246 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3247 br_dev = netdev_master_upper_dev_get(dev);
3248 cops = br_dev->netdev_ops;
3251 if (dev != br_dev &&
3252 !(dev->priv_flags & IFF_BRIDGE_PORT))
3255 if (br_dev != netdev_master_upper_dev_get(dev) &&
3256 !(dev->priv_flags & IFF_EBRIDGE))
3264 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3265 if (cops && cops->ndo_fdb_dump) {
3266 err = cops->ndo_fdb_dump(skb, cb,
3269 if (err == -EMSGSIZE)
3274 if (dev->netdev_ops->ndo_fdb_dump)
3275 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
3279 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
3281 if (err == -EMSGSIZE)
3286 /* reset fdb offset to 0 for rest of the interfaces */
3302 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3303 unsigned int attrnum, unsigned int flag)
3306 return nla_put_u8(skb, attrnum, !!(flags & flag));
3310 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
3311 struct net_device *dev, u16 mode,
3312 u32 flags, u32 mask, int nlflags,
3314 int (*vlan_fill)(struct sk_buff *skb,
3315 struct net_device *dev,
3318 struct nlmsghdr *nlh;
3319 struct ifinfomsg *ifm;
3320 struct nlattr *br_afspec;
3321 struct nlattr *protinfo;
3322 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
3323 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3326 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
3330 ifm = nlmsg_data(nlh);
3331 ifm->ifi_family = AF_BRIDGE;
3333 ifm->ifi_type = dev->type;
3334 ifm->ifi_index = dev->ifindex;
3335 ifm->ifi_flags = dev_get_flags(dev);
3336 ifm->ifi_change = 0;
3339 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3340 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3341 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
3343 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
3345 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
3346 (dev->ifindex != dev_get_iflink(dev) &&
3347 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
3348 goto nla_put_failure;
3350 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3352 goto nla_put_failure;
3354 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
3355 nla_nest_cancel(skb, br_afspec);
3356 goto nla_put_failure;
3359 if (mode != BRIDGE_MODE_UNDEF) {
3360 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3361 nla_nest_cancel(skb, br_afspec);
3362 goto nla_put_failure;
3366 err = vlan_fill(skb, dev, filter_mask);
3368 nla_nest_cancel(skb, br_afspec);
3369 goto nla_put_failure;
3372 nla_nest_end(skb, br_afspec);
3374 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3376 goto nla_put_failure;
3378 if (brport_nla_put_flag(skb, flags, mask,
3379 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3380 brport_nla_put_flag(skb, flags, mask,
3381 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3382 brport_nla_put_flag(skb, flags, mask,
3383 IFLA_BRPORT_FAST_LEAVE,
3384 BR_MULTICAST_FAST_LEAVE) ||
3385 brport_nla_put_flag(skb, flags, mask,
3386 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3387 brport_nla_put_flag(skb, flags, mask,
3388 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3389 brport_nla_put_flag(skb, flags, mask,
3390 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3391 brport_nla_put_flag(skb, flags, mask,
3392 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3393 brport_nla_put_flag(skb, flags, mask,
3394 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3395 nla_nest_cancel(skb, protinfo);
3396 goto nla_put_failure;
3399 nla_nest_end(skb, protinfo);
3401 nlmsg_end(skb, nlh);
3404 nlmsg_cancel(skb, nlh);
3405 return err ? err : -EMSGSIZE;
3407 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
3409 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3411 struct net *net = sock_net(skb->sk);
3412 struct net_device *dev;
3414 u32 portid = NETLINK_CB(cb->skb).portid;
3415 u32 seq = cb->nlh->nlmsg_seq;
3416 u32 filter_mask = 0;
3419 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3420 struct nlattr *extfilt;
3422 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3425 if (nla_len(extfilt) < sizeof(filter_mask))
3428 filter_mask = nla_get_u32(extfilt);
3433 for_each_netdev_rcu(net, dev) {
3434 const struct net_device_ops *ops = dev->netdev_ops;
3435 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3437 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
3438 if (idx >= cb->args[0]) {
3439 err = br_dev->netdev_ops->ndo_bridge_getlink(
3440 skb, portid, seq, dev,
3441 filter_mask, NLM_F_MULTI);
3442 if (err < 0 && err != -EOPNOTSUPP)
3448 if (ops->ndo_bridge_getlink) {
3449 if (idx >= cb->args[0]) {
3450 err = ops->ndo_bridge_getlink(skb, portid,
3454 if (err < 0 && err != -EOPNOTSUPP)
3466 static inline size_t bridge_nlmsg_size(void)
3468 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3469 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3470 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3471 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3472 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3473 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3474 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3475 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3476 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3477 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3478 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3481 static int rtnl_bridge_notify(struct net_device *dev)
3483 struct net *net = dev_net(dev);
3484 struct sk_buff *skb;
3485 int err = -EOPNOTSUPP;
3487 if (!dev->netdev_ops->ndo_bridge_getlink)
3490 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3496 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
3503 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3506 WARN_ON(err == -EMSGSIZE);
3509 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
3513 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3514 struct netlink_ext_ack *extack)
3516 struct net *net = sock_net(skb->sk);
3517 struct ifinfomsg *ifm;
3518 struct net_device *dev;
3519 struct nlattr *br_spec, *attr = NULL;
3520 int rem, err = -EOPNOTSUPP;
3522 bool have_flags = false;
3524 if (nlmsg_len(nlh) < sizeof(*ifm))
3527 ifm = nlmsg_data(nlh);
3528 if (ifm->ifi_family != AF_BRIDGE)
3529 return -EPFNOSUPPORT;
3531 dev = __dev_get_by_index(net, ifm->ifi_index);
3533 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3537 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3539 nla_for_each_nested(attr, br_spec, rem) {
3540 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3541 if (nla_len(attr) < sizeof(flags))
3545 flags = nla_get_u16(attr);
3551 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3552 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3554 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
3559 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
3563 flags &= ~BRIDGE_FLAGS_MASTER;
3566 if ((flags & BRIDGE_FLAGS_SELF)) {
3567 if (!dev->netdev_ops->ndo_bridge_setlink)
3570 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3573 flags &= ~BRIDGE_FLAGS_SELF;
3575 /* Generate event to notify upper layer of bridge
3578 err = rtnl_bridge_notify(dev);
3583 memcpy(nla_data(attr), &flags, sizeof(flags));
3588 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
3589 struct netlink_ext_ack *extack)
3591 struct net *net = sock_net(skb->sk);
3592 struct ifinfomsg *ifm;
3593 struct net_device *dev;
3594 struct nlattr *br_spec, *attr = NULL;
3595 int rem, err = -EOPNOTSUPP;
3597 bool have_flags = false;
3599 if (nlmsg_len(nlh) < sizeof(*ifm))
3602 ifm = nlmsg_data(nlh);
3603 if (ifm->ifi_family != AF_BRIDGE)
3604 return -EPFNOSUPPORT;
3606 dev = __dev_get_by_index(net, ifm->ifi_index);
3608 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3612 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3614 nla_for_each_nested(attr, br_spec, rem) {
3615 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3616 if (nla_len(attr) < sizeof(flags))
3620 flags = nla_get_u16(attr);
3626 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3627 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3629 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3634 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
3638 flags &= ~BRIDGE_FLAGS_MASTER;
3641 if ((flags & BRIDGE_FLAGS_SELF)) {
3642 if (!dev->netdev_ops->ndo_bridge_dellink)
3645 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3649 flags &= ~BRIDGE_FLAGS_SELF;
3651 /* Generate event to notify upper layer of bridge
3654 err = rtnl_bridge_notify(dev);
3659 memcpy(nla_data(attr), &flags, sizeof(flags));
3664 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
3666 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
3667 (!idxattr || idxattr == attrid);
3670 #define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1)
3671 static int rtnl_get_offload_stats_attr_size(int attr_id)
3674 case IFLA_OFFLOAD_XSTATS_CPU_HIT:
3675 return sizeof(struct rtnl_link_stats64);
3681 static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev,
3684 struct nlattr *attr = NULL;
3689 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
3690 dev->netdev_ops->ndo_get_offload_stats))
3693 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
3694 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
3695 if (attr_id < *prividx)
3698 size = rtnl_get_offload_stats_attr_size(attr_id);
3702 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
3705 attr = nla_reserve_64bit(skb, attr_id, size,
3706 IFLA_OFFLOAD_XSTATS_UNSPEC);
3708 goto nla_put_failure;
3710 attr_data = nla_data(attr);
3711 memset(attr_data, 0, size);
3712 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev,
3715 goto get_offload_stats_failure;
3726 get_offload_stats_failure:
3731 static int rtnl_get_offload_stats_size(const struct net_device *dev)
3737 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
3738 dev->netdev_ops->ndo_get_offload_stats))
3741 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
3742 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
3743 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
3745 size = rtnl_get_offload_stats_attr_size(attr_id);
3746 nla_size += nla_total_size_64bit(size);
3750 nla_size += nla_total_size(0);
3755 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
3756 int type, u32 pid, u32 seq, u32 change,
3757 unsigned int flags, unsigned int filter_mask,
3758 int *idxattr, int *prividx)
3760 struct if_stats_msg *ifsm;
3761 struct nlmsghdr *nlh;
3762 struct nlattr *attr;
3763 int s_prividx = *prividx;
3768 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
3772 ifsm = nlmsg_data(nlh);
3773 ifsm->ifindex = dev->ifindex;
3774 ifsm->filter_mask = filter_mask;
3776 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
3777 struct rtnl_link_stats64 *sp;
3779 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
3780 sizeof(struct rtnl_link_stats64),
3783 goto nla_put_failure;
3785 sp = nla_data(attr);
3786 dev_get_stats(dev, sp);
3789 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
3790 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3792 if (ops && ops->fill_linkxstats) {
3793 *idxattr = IFLA_STATS_LINK_XSTATS;
3794 attr = nla_nest_start(skb,
3795 IFLA_STATS_LINK_XSTATS);
3797 goto nla_put_failure;
3799 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
3800 nla_nest_end(skb, attr);
3802 goto nla_put_failure;
3807 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
3809 const struct rtnl_link_ops *ops = NULL;
3810 const struct net_device *master;
3812 master = netdev_master_upper_dev_get(dev);
3814 ops = master->rtnl_link_ops;
3815 if (ops && ops->fill_linkxstats) {
3816 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
3817 attr = nla_nest_start(skb,
3818 IFLA_STATS_LINK_XSTATS_SLAVE);
3820 goto nla_put_failure;
3822 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
3823 nla_nest_end(skb, attr);
3825 goto nla_put_failure;
3830 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
3832 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
3833 attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS);
3835 goto nla_put_failure;
3837 err = rtnl_get_offload_stats(skb, dev, prividx);
3838 if (err == -ENODATA)
3839 nla_nest_cancel(skb, attr);
3841 nla_nest_end(skb, attr);
3843 if (err && err != -ENODATA)
3844 goto nla_put_failure;
3848 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
3849 struct rtnl_af_ops *af_ops;
3851 *idxattr = IFLA_STATS_AF_SPEC;
3852 attr = nla_nest_start(skb, IFLA_STATS_AF_SPEC);
3854 goto nla_put_failure;
3856 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
3857 if (af_ops->fill_stats_af) {
3861 af = nla_nest_start(skb, af_ops->family);
3863 goto nla_put_failure;
3865 err = af_ops->fill_stats_af(skb, dev);
3867 if (err == -ENODATA)
3868 nla_nest_cancel(skb, af);
3870 goto nla_put_failure;
3872 nla_nest_end(skb, af);
3876 nla_nest_end(skb, attr);
3881 nlmsg_end(skb, nlh);
3886 /* not a multi message or no progress mean a real error */
3887 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
3888 nlmsg_cancel(skb, nlh);
3890 nlmsg_end(skb, nlh);
3895 static size_t if_nlmsg_stats_size(const struct net_device *dev,
3900 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
3901 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
3903 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
3904 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3905 int attr = IFLA_STATS_LINK_XSTATS;
3907 if (ops && ops->get_linkxstats_size) {
3908 size += nla_total_size(ops->get_linkxstats_size(dev,
3910 /* for IFLA_STATS_LINK_XSTATS */
3911 size += nla_total_size(0);
3915 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
3916 struct net_device *_dev = (struct net_device *)dev;
3917 const struct rtnl_link_ops *ops = NULL;
3918 const struct net_device *master;
3920 /* netdev_master_upper_dev_get can't take const */
3921 master = netdev_master_upper_dev_get(_dev);
3923 ops = master->rtnl_link_ops;
3924 if (ops && ops->get_linkxstats_size) {
3925 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
3927 size += nla_total_size(ops->get_linkxstats_size(dev,
3929 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
3930 size += nla_total_size(0);
3934 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
3935 size += rtnl_get_offload_stats_size(dev);
3937 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
3938 struct rtnl_af_ops *af_ops;
3940 /* for IFLA_STATS_AF_SPEC */
3941 size += nla_total_size(0);
3943 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
3944 if (af_ops->get_stats_af_size) {
3945 size += nla_total_size(
3946 af_ops->get_stats_af_size(dev));
3949 size += nla_total_size(0);
3957 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
3958 struct netlink_ext_ack *extack)
3960 struct net *net = sock_net(skb->sk);
3961 struct net_device *dev = NULL;
3962 int idxattr = 0, prividx = 0;
3963 struct if_stats_msg *ifsm;
3964 struct sk_buff *nskb;
3968 if (nlmsg_len(nlh) < sizeof(*ifsm))
3971 ifsm = nlmsg_data(nlh);
3972 if (ifsm->ifindex > 0)
3973 dev = __dev_get_by_index(net, ifsm->ifindex);
3980 filter_mask = ifsm->filter_mask;
3984 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
3988 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
3989 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
3990 0, filter_mask, &idxattr, &prividx);
3992 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
3993 WARN_ON(err == -EMSGSIZE);
3996 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
4002 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
4004 int h, s_h, err, s_idx, s_idxattr, s_prividx;
4005 struct net *net = sock_net(skb->sk);
4006 unsigned int flags = NLM_F_MULTI;
4007 struct if_stats_msg *ifsm;
4008 struct hlist_head *head;
4009 struct net_device *dev;
4010 u32 filter_mask = 0;
4014 s_idx = cb->args[1];
4015 s_idxattr = cb->args[2];
4016 s_prividx = cb->args[3];
4018 cb->seq = net->dev_base_seq;
4020 if (nlmsg_len(cb->nlh) < sizeof(*ifsm))
4023 ifsm = nlmsg_data(cb->nlh);
4024 filter_mask = ifsm->filter_mask;
4028 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4030 head = &net->dev_index_head[h];
4031 hlist_for_each_entry(dev, head, index_hlist) {
4034 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
4035 NETLINK_CB(cb->skb).portid,
4036 cb->nlh->nlmsg_seq, 0,
4038 &s_idxattr, &s_prividx);
4039 /* If we ran out of room on the first message,
4042 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
4048 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
4054 cb->args[3] = s_prividx;
4055 cb->args[2] = s_idxattr;
4062 /* Process one rtnetlink message. */
4064 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
4065 struct netlink_ext_ack *extack)
4067 struct net *net = sock_net(skb->sk);
4068 rtnl_doit_func doit;
4074 type = nlh->nlmsg_type;
4080 /* All the messages must have at least 1 byte length */
4081 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
4084 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
4087 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
4090 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
4092 rtnl_dumpit_func dumpit;
4093 rtnl_calcit_func calcit;
4094 u16 min_dump_alloc = 0;
4096 dumpit = rtnl_get_dumpit(family, type);
4099 calcit = rtnl_get_calcit(family, type);
4101 min_dump_alloc = calcit(skb, nlh);
4106 struct netlink_dump_control c = {
4108 .min_dump_alloc = min_dump_alloc,
4110 err = netlink_dump_start(rtnl, skb, nlh, &c);
4116 doit = rtnl_get_doit(family, type);
4120 return doit(skb, nlh, extack);
4123 static void rtnetlink_rcv(struct sk_buff *skb)
4126 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
4130 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
4132 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
4136 case NETDEV_CHANGENAME:
4137 case NETDEV_FEAT_CHANGE:
4138 case NETDEV_BONDING_FAILOVER:
4139 case NETDEV_NOTIFY_PEERS:
4140 case NETDEV_RESEND_IGMP:
4141 case NETDEV_CHANGEINFODATA:
4142 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
4150 static struct notifier_block rtnetlink_dev_notifier = {
4151 .notifier_call = rtnetlink_event,
4155 static int __net_init rtnetlink_net_init(struct net *net)
4158 struct netlink_kernel_cfg cfg = {
4159 .groups = RTNLGRP_MAX,
4160 .input = rtnetlink_rcv,
4161 .cb_mutex = &rtnl_mutex,
4162 .flags = NL_CFG_F_NONROOT_RECV,
4165 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
4172 static void __net_exit rtnetlink_net_exit(struct net *net)
4174 netlink_kernel_release(net->rtnl);
4178 static struct pernet_operations rtnetlink_net_ops = {
4179 .init = rtnetlink_net_init,
4180 .exit = rtnetlink_net_exit,
4183 void __init rtnetlink_init(void)
4185 if (register_pernet_subsys(&rtnetlink_net_ops))
4186 panic("rtnetlink_init: cannot initialize rtnetlink\n");
4188 register_netdevice_notifier(&rtnetlink_dev_notifier);
4190 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
4191 rtnl_dump_ifinfo, rtnl_calcit);
4192 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
4193 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
4194 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
4196 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
4197 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
4198 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, NULL);
4200 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
4201 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
4202 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
4204 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
4205 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
4206 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
4208 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,