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(void)
901 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */
902 nla_total_size(1); /* XDP_ATTACHED */
907 static noinline size_t if_nlmsg_size(const struct net_device *dev,
910 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
911 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
912 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
913 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
914 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
915 + nla_total_size(sizeof(struct rtnl_link_stats))
916 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
917 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
918 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
919 + nla_total_size(4) /* IFLA_TXQLEN */
920 + nla_total_size(4) /* IFLA_WEIGHT */
921 + nla_total_size(4) /* IFLA_MTU */
922 + nla_total_size(4) /* IFLA_LINK */
923 + nla_total_size(4) /* IFLA_MASTER */
924 + nla_total_size(1) /* IFLA_CARRIER */
925 + nla_total_size(4) /* IFLA_PROMISCUITY */
926 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
927 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
928 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
929 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
930 + nla_total_size(1) /* IFLA_OPERSTATE */
931 + nla_total_size(1) /* IFLA_LINKMODE */
932 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
933 + nla_total_size(4) /* IFLA_LINK_NETNSID */
934 + nla_total_size(ext_filter_mask
935 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
936 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
937 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
938 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
939 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
940 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
941 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
942 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
943 + rtnl_xdp_size() /* IFLA_XDP */
944 + nla_total_size(1); /* IFLA_PROTO_DOWN */
948 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
950 struct nlattr *vf_ports;
951 struct nlattr *vf_port;
955 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
959 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
960 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
962 goto nla_put_failure;
963 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
964 goto nla_put_failure;
965 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
966 if (err == -EMSGSIZE)
967 goto nla_put_failure;
969 nla_nest_cancel(skb, vf_port);
972 nla_nest_end(skb, vf_port);
975 nla_nest_end(skb, vf_ports);
980 nla_nest_cancel(skb, vf_ports);
984 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
986 struct nlattr *port_self;
989 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
993 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
995 nla_nest_cancel(skb, port_self);
996 return (err == -EMSGSIZE) ? err : 0;
999 nla_nest_end(skb, port_self);
1004 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1005 u32 ext_filter_mask)
1009 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1010 !(ext_filter_mask & RTEXT_FILTER_VF))
1013 err = rtnl_port_self_fill(skb, dev);
1017 if (dev_num_vf(dev->dev.parent)) {
1018 err = rtnl_vf_ports_fill(skb, dev);
1026 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1029 struct netdev_phys_item_id ppid;
1031 err = dev_get_phys_port_id(dev, &ppid);
1033 if (err == -EOPNOTSUPP)
1038 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1044 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1046 char name[IFNAMSIZ];
1049 err = dev_get_phys_port_name(dev, name, sizeof(name));
1051 if (err == -EOPNOTSUPP)
1056 if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
1062 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1065 struct switchdev_attr attr = {
1067 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
1068 .flags = SWITCHDEV_F_NO_RECURSE,
1071 err = switchdev_port_attr_get(dev, &attr);
1073 if (err == -EOPNOTSUPP)
1078 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1085 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1086 struct net_device *dev)
1088 struct rtnl_link_stats64 *sp;
1089 struct nlattr *attr;
1091 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1092 sizeof(struct rtnl_link_stats64), IFLA_PAD);
1096 sp = nla_data(attr);
1097 dev_get_stats(dev, sp);
1099 attr = nla_reserve(skb, IFLA_STATS,
1100 sizeof(struct rtnl_link_stats));
1104 copy_rtnl_link_stats(nla_data(attr), sp);
1109 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1110 struct net_device *dev,
1112 struct nlattr *vfinfo)
1114 struct ifla_vf_rss_query_en vf_rss_query_en;
1115 struct nlattr *vf, *vfstats, *vfvlanlist;
1116 struct ifla_vf_link_state vf_linkstate;
1117 struct ifla_vf_vlan_info vf_vlan_info;
1118 struct ifla_vf_spoofchk vf_spoofchk;
1119 struct ifla_vf_tx_rate vf_tx_rate;
1120 struct ifla_vf_stats vf_stats;
1121 struct ifla_vf_trust vf_trust;
1122 struct ifla_vf_vlan vf_vlan;
1123 struct ifla_vf_rate vf_rate;
1124 struct ifla_vf_mac vf_mac;
1125 struct ifla_vf_info ivi;
1127 /* Not all SR-IOV capable drivers support the
1128 * spoofcheck and "RSS query enable" query. Preset to
1129 * -1 so the user space tool can detect that the driver
1130 * didn't report anything.
1133 ivi.rss_query_en = -1;
1135 memset(ivi.mac, 0, sizeof(ivi.mac));
1136 /* The default value for VF link state is "auto"
1137 * IFLA_VF_LINK_STATE_AUTO which equals zero
1140 /* VLAN Protocol by default is 802.1Q */
1141 ivi.vlan_proto = htons(ETH_P_8021Q);
1142 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1145 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
1154 vf_rss_query_en.vf =
1155 vf_trust.vf = ivi.vf;
1157 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1158 vf_vlan.vlan = ivi.vlan;
1159 vf_vlan.qos = ivi.qos;
1160 vf_vlan_info.vlan = ivi.vlan;
1161 vf_vlan_info.qos = ivi.qos;
1162 vf_vlan_info.vlan_proto = ivi.vlan_proto;
1163 vf_tx_rate.rate = ivi.max_tx_rate;
1164 vf_rate.min_tx_rate = ivi.min_tx_rate;
1165 vf_rate.max_tx_rate = ivi.max_tx_rate;
1166 vf_spoofchk.setting = ivi.spoofchk;
1167 vf_linkstate.link_state = ivi.linkstate;
1168 vf_rss_query_en.setting = ivi.rss_query_en;
1169 vf_trust.setting = ivi.trusted;
1170 vf = nla_nest_start(skb, IFLA_VF_INFO);
1172 goto nla_put_vfinfo_failure;
1173 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1174 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1175 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1177 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1179 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1181 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1183 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1184 sizeof(vf_rss_query_en),
1185 &vf_rss_query_en) ||
1186 nla_put(skb, IFLA_VF_TRUST,
1187 sizeof(vf_trust), &vf_trust))
1188 goto nla_put_vf_failure;
1189 vfvlanlist = nla_nest_start(skb, IFLA_VF_VLAN_LIST);
1191 goto nla_put_vf_failure;
1192 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1194 nla_nest_cancel(skb, vfvlanlist);
1195 goto nla_put_vf_failure;
1197 nla_nest_end(skb, vfvlanlist);
1198 memset(&vf_stats, 0, sizeof(vf_stats));
1199 if (dev->netdev_ops->ndo_get_vf_stats)
1200 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1202 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1204 goto nla_put_vf_failure;
1205 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1206 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1207 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1208 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1209 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1210 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1211 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1212 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1213 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1214 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1215 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
1216 vf_stats.multicast, IFLA_VF_STATS_PAD)) {
1217 nla_nest_cancel(skb, vfstats);
1218 goto nla_put_vf_failure;
1220 nla_nest_end(skb, vfstats);
1221 nla_nest_end(skb, vf);
1225 nla_nest_cancel(skb, vf);
1226 nla_put_vfinfo_failure:
1227 nla_nest_cancel(skb, vfinfo);
1231 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1233 struct rtnl_link_ifmap map;
1235 memset(&map, 0, sizeof(map));
1236 map.mem_start = dev->mem_start;
1237 map.mem_end = dev->mem_end;
1238 map.base_addr = dev->base_addr;
1241 map.port = dev->if_port;
1243 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
1249 static u8 rtnl_xdp_attached_mode(struct net_device *dev)
1251 const struct net_device_ops *ops = dev->netdev_ops;
1255 if (rcu_access_pointer(dev->xdp_prog))
1256 return XDP_ATTACHED_SKB;
1257 if (ops->ndo_xdp && __dev_xdp_attached(dev, ops->ndo_xdp))
1258 return XDP_ATTACHED_DRV;
1260 return XDP_ATTACHED_NONE;
1263 static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1268 xdp = nla_nest_start(skb, IFLA_XDP);
1272 err = nla_put_u8(skb, IFLA_XDP_ATTACHED,
1273 rtnl_xdp_attached_mode(dev));
1277 nla_nest_end(skb, xdp);
1281 nla_nest_cancel(skb, xdp);
1285 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
1286 int type, u32 pid, u32 seq, u32 change,
1287 unsigned int flags, u32 ext_filter_mask)
1289 struct ifinfomsg *ifm;
1290 struct nlmsghdr *nlh;
1291 struct nlattr *af_spec;
1292 struct rtnl_af_ops *af_ops;
1293 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1296 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1300 ifm = nlmsg_data(nlh);
1301 ifm->ifi_family = AF_UNSPEC;
1303 ifm->ifi_type = dev->type;
1304 ifm->ifi_index = dev->ifindex;
1305 ifm->ifi_flags = dev_get_flags(dev);
1306 ifm->ifi_change = change;
1308 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1309 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1310 nla_put_u8(skb, IFLA_OPERSTATE,
1311 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1312 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1313 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1314 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1315 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
1316 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1317 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1318 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1320 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1322 (dev->ifindex != dev_get_iflink(dev) &&
1323 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
1325 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
1326 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1328 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1330 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1331 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1332 atomic_read(&dev->carrier_changes)) ||
1333 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
1334 goto nla_put_failure;
1336 if (rtnl_fill_link_ifmap(skb, dev))
1337 goto nla_put_failure;
1339 if (dev->addr_len) {
1340 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1341 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1342 goto nla_put_failure;
1345 if (rtnl_phys_port_id_fill(skb, dev))
1346 goto nla_put_failure;
1348 if (rtnl_phys_port_name_fill(skb, dev))
1349 goto nla_put_failure;
1351 if (rtnl_phys_switch_id_fill(skb, dev))
1352 goto nla_put_failure;
1354 if (rtnl_fill_stats(skb, dev))
1355 goto nla_put_failure;
1357 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1358 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1359 goto nla_put_failure;
1361 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
1362 ext_filter_mask & RTEXT_FILTER_VF) {
1364 struct nlattr *vfinfo;
1365 int num_vfs = dev_num_vf(dev->dev.parent);
1367 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1369 goto nla_put_failure;
1370 for (i = 0; i < num_vfs; i++) {
1371 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1372 goto nla_put_failure;
1375 nla_nest_end(skb, vfinfo);
1378 if (rtnl_port_fill(skb, dev, ext_filter_mask))
1379 goto nla_put_failure;
1381 if (rtnl_xdp_fill(skb, dev))
1382 goto nla_put_failure;
1384 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1385 if (rtnl_link_fill(skb, dev) < 0)
1386 goto nla_put_failure;
1389 if (dev->rtnl_link_ops &&
1390 dev->rtnl_link_ops->get_link_net) {
1391 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1393 if (!net_eq(dev_net(dev), link_net)) {
1394 int id = peernet2id_alloc(dev_net(dev), link_net);
1396 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1397 goto nla_put_failure;
1401 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1402 goto nla_put_failure;
1404 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1405 if (af_ops->fill_link_af) {
1409 if (!(af = nla_nest_start(skb, af_ops->family)))
1410 goto nla_put_failure;
1412 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1415 * Caller may return ENODATA to indicate that there
1416 * was no data to be dumped. This is not an error, it
1417 * means we should trim the attribute header and
1420 if (err == -ENODATA)
1421 nla_nest_cancel(skb, af);
1423 goto nla_put_failure;
1425 nla_nest_end(skb, af);
1429 nla_nest_end(skb, af_spec);
1431 nlmsg_end(skb, nlh);
1435 nlmsg_cancel(skb, nlh);
1439 static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1440 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1441 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1442 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1443 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1444 [IFLA_MTU] = { .type = NLA_U32 },
1445 [IFLA_LINK] = { .type = NLA_U32 },
1446 [IFLA_MASTER] = { .type = NLA_U32 },
1447 [IFLA_CARRIER] = { .type = NLA_U8 },
1448 [IFLA_TXQLEN] = { .type = NLA_U32 },
1449 [IFLA_WEIGHT] = { .type = NLA_U32 },
1450 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1451 [IFLA_LINKMODE] = { .type = NLA_U8 },
1452 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1453 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1454 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1455 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1456 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1457 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1458 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1459 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1460 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1461 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1462 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1463 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1464 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1465 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
1466 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1467 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
1468 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
1469 [IFLA_XDP] = { .type = NLA_NESTED },
1472 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1473 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1474 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1475 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1476 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
1479 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1480 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1481 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1482 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
1483 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1484 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1485 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1486 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
1487 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
1488 [IFLA_VF_STATS] = { .type = NLA_NESTED },
1489 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
1490 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1491 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1494 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1495 [IFLA_PORT_VF] = { .type = NLA_U32 },
1496 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1497 .len = PORT_PROFILE_MAX },
1498 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1499 .len = PORT_UUID_MAX },
1500 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1501 .len = PORT_UUID_MAX },
1502 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1503 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1505 /* Unused, but we need to keep it here since user space could
1506 * fill it. It's also broken with regard to NLA_BINARY use in
1507 * combination with structs.
1509 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1510 .len = sizeof(struct ifla_port_vsi) },
1513 static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
1514 [IFLA_XDP_FD] = { .type = NLA_S32 },
1515 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
1516 [IFLA_XDP_FLAGS] = { .type = NLA_U32 },
1519 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1521 const struct rtnl_link_ops *ops = NULL;
1522 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1524 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla,
1525 ifla_info_policy, NULL) < 0)
1528 if (linfo[IFLA_INFO_KIND]) {
1529 char kind[MODULE_NAME_LEN];
1531 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1532 ops = rtnl_link_ops_get(kind);
1538 static bool link_master_filtered(struct net_device *dev, int master_idx)
1540 struct net_device *master;
1545 master = netdev_master_upper_dev_get(dev);
1546 if (!master || master->ifindex != master_idx)
1552 static bool link_kind_filtered(const struct net_device *dev,
1553 const struct rtnl_link_ops *kind_ops)
1555 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1561 static bool link_dump_filtered(struct net_device *dev,
1563 const struct rtnl_link_ops *kind_ops)
1565 if (link_master_filtered(dev, master_idx) ||
1566 link_kind_filtered(dev, kind_ops))
1572 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1574 struct net *net = sock_net(skb->sk);
1577 struct net_device *dev;
1578 struct hlist_head *head;
1579 struct nlattr *tb[IFLA_MAX+1];
1580 u32 ext_filter_mask = 0;
1581 const struct rtnl_link_ops *kind_ops = NULL;
1582 unsigned int flags = NLM_F_MULTI;
1588 s_idx = cb->args[1];
1590 cb->seq = net->dev_base_seq;
1592 /* A hack to preserve kernel<->userspace interface.
1593 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1594 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1595 * what iproute2 < v3.9.0 used.
1596 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1597 * attribute, its netlink message is shorter than struct ifinfomsg.
1599 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1600 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1602 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX,
1603 ifla_policy, NULL) >= 0) {
1604 if (tb[IFLA_EXT_MASK])
1605 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1607 if (tb[IFLA_MASTER])
1608 master_idx = nla_get_u32(tb[IFLA_MASTER]);
1610 if (tb[IFLA_LINKINFO])
1611 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
1613 if (master_idx || kind_ops)
1614 flags |= NLM_F_DUMP_FILTERED;
1617 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1619 head = &net->dev_index_head[h];
1620 hlist_for_each_entry(dev, head, index_hlist) {
1621 if (link_dump_filtered(dev, master_idx, kind_ops))
1625 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1626 NETLINK_CB(cb->skb).portid,
1627 cb->nlh->nlmsg_seq, 0,
1632 if (likely(skb->len))
1638 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1652 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
1653 struct netlink_ext_ack *exterr)
1655 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy, exterr);
1657 EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1659 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1662 /* Examine the link attributes and figure out which
1663 * network namespace we are talking about.
1665 if (tb[IFLA_NET_NS_PID])
1666 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1667 else if (tb[IFLA_NET_NS_FD])
1668 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1670 net = get_net(src_net);
1673 EXPORT_SYMBOL(rtnl_link_get_net);
1675 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1678 if (tb[IFLA_ADDRESS] &&
1679 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1682 if (tb[IFLA_BROADCAST] &&
1683 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1687 if (tb[IFLA_AF_SPEC]) {
1691 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1692 const struct rtnl_af_ops *af_ops;
1694 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1695 return -EAFNOSUPPORT;
1697 if (!af_ops->set_link_af)
1700 if (af_ops->validate_link_af) {
1701 err = af_ops->validate_link_af(dev, af);
1711 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
1714 const struct net_device_ops *ops = dev->netdev_ops;
1716 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
1719 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
1721 if (dev->type != ARPHRD_INFINIBAND)
1724 return handle_infiniband_guid(dev, ivt, guid_type);
1727 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
1729 const struct net_device_ops *ops = dev->netdev_ops;
1732 if (tb[IFLA_VF_MAC]) {
1733 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
1736 if (ops->ndo_set_vf_mac)
1737 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1743 if (tb[IFLA_VF_VLAN]) {
1744 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1747 if (ops->ndo_set_vf_vlan)
1748 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1750 htons(ETH_P_8021Q));
1755 if (tb[IFLA_VF_VLAN_LIST]) {
1756 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
1757 struct nlattr *attr;
1761 if (!ops->ndo_set_vf_vlan)
1764 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
1765 if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
1766 nla_len(attr) < NLA_HDRLEN) {
1769 if (len >= MAX_VLAN_LIST_LEN)
1771 ivvl[len] = nla_data(attr);
1778 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
1779 ivvl[0]->qos, ivvl[0]->vlan_proto);
1784 if (tb[IFLA_VF_TX_RATE]) {
1785 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1786 struct ifla_vf_info ivf;
1789 if (ops->ndo_get_vf_config)
1790 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1795 if (ops->ndo_set_vf_rate)
1796 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1803 if (tb[IFLA_VF_RATE]) {
1804 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1807 if (ops->ndo_set_vf_rate)
1808 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1815 if (tb[IFLA_VF_SPOOFCHK]) {
1816 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1819 if (ops->ndo_set_vf_spoofchk)
1820 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1826 if (tb[IFLA_VF_LINK_STATE]) {
1827 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1830 if (ops->ndo_set_vf_link_state)
1831 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1837 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1838 struct ifla_vf_rss_query_en *ivrssq_en;
1841 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1842 if (ops->ndo_set_vf_rss_query_en)
1843 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1844 ivrssq_en->setting);
1849 if (tb[IFLA_VF_TRUST]) {
1850 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1853 if (ops->ndo_set_vf_trust)
1854 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1859 if (tb[IFLA_VF_IB_NODE_GUID]) {
1860 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
1862 if (!ops->ndo_set_vf_guid)
1865 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
1868 if (tb[IFLA_VF_IB_PORT_GUID]) {
1869 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
1871 if (!ops->ndo_set_vf_guid)
1874 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
1880 static int do_set_master(struct net_device *dev, int ifindex)
1882 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1883 const struct net_device_ops *ops;
1887 if (upper_dev->ifindex == ifindex)
1889 ops = upper_dev->netdev_ops;
1890 if (ops->ndo_del_slave) {
1891 err = ops->ndo_del_slave(upper_dev, dev);
1900 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1903 ops = upper_dev->netdev_ops;
1904 if (ops->ndo_add_slave) {
1905 err = ops->ndo_add_slave(upper_dev, dev);
1915 #define DO_SETLINK_MODIFIED 0x01
1916 /* notify flag means notify + modified. */
1917 #define DO_SETLINK_NOTIFY 0x03
1918 static int do_setlink(const struct sk_buff *skb,
1919 struct net_device *dev, struct ifinfomsg *ifm,
1920 struct netlink_ext_ack *extack,
1921 struct nlattr **tb, char *ifname, int status)
1923 const struct net_device_ops *ops = dev->netdev_ops;
1926 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
1927 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1932 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
1937 err = dev_change_net_namespace(dev, net, ifname);
1941 status |= DO_SETLINK_MODIFIED;
1945 struct rtnl_link_ifmap *u_map;
1948 if (!ops->ndo_set_config) {
1953 if (!netif_device_present(dev)) {
1958 u_map = nla_data(tb[IFLA_MAP]);
1959 k_map.mem_start = (unsigned long) u_map->mem_start;
1960 k_map.mem_end = (unsigned long) u_map->mem_end;
1961 k_map.base_addr = (unsigned short) u_map->base_addr;
1962 k_map.irq = (unsigned char) u_map->irq;
1963 k_map.dma = (unsigned char) u_map->dma;
1964 k_map.port = (unsigned char) u_map->port;
1966 err = ops->ndo_set_config(dev, &k_map);
1970 status |= DO_SETLINK_NOTIFY;
1973 if (tb[IFLA_ADDRESS]) {
1974 struct sockaddr *sa;
1977 len = sizeof(sa_family_t) + dev->addr_len;
1978 sa = kmalloc(len, GFP_KERNEL);
1983 sa->sa_family = dev->type;
1984 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1986 err = dev_set_mac_address(dev, sa);
1990 status |= DO_SETLINK_MODIFIED;
1994 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1997 status |= DO_SETLINK_MODIFIED;
2000 if (tb[IFLA_GROUP]) {
2001 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2002 status |= DO_SETLINK_NOTIFY;
2006 * Interface selected by interface index but interface
2007 * name provided implies that a name change has been
2010 if (ifm->ifi_index > 0 && ifname[0]) {
2011 err = dev_change_name(dev, ifname);
2014 status |= DO_SETLINK_MODIFIED;
2017 if (tb[IFLA_IFALIAS]) {
2018 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2019 nla_len(tb[IFLA_IFALIAS]));
2022 status |= DO_SETLINK_NOTIFY;
2025 if (tb[IFLA_BROADCAST]) {
2026 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
2027 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
2030 if (ifm->ifi_flags || ifm->ifi_change) {
2031 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2036 if (tb[IFLA_MASTER]) {
2037 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
2040 status |= DO_SETLINK_MODIFIED;
2043 if (tb[IFLA_CARRIER]) {
2044 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2047 status |= DO_SETLINK_MODIFIED;
2050 if (tb[IFLA_TXQLEN]) {
2051 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
2052 unsigned long orig_len = dev->tx_queue_len;
2054 if (dev->tx_queue_len ^ value) {
2055 dev->tx_queue_len = value;
2056 err = call_netdevice_notifiers(
2057 NETDEV_CHANGE_TX_QUEUE_LEN, dev);
2058 err = notifier_to_errno(err);
2060 dev->tx_queue_len = orig_len;
2063 status |= DO_SETLINK_NOTIFY;
2067 if (tb[IFLA_OPERSTATE])
2068 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2070 if (tb[IFLA_LINKMODE]) {
2071 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2073 write_lock_bh(&dev_base_lock);
2074 if (dev->link_mode ^ value)
2075 status |= DO_SETLINK_NOTIFY;
2076 dev->link_mode = value;
2077 write_unlock_bh(&dev_base_lock);
2080 if (tb[IFLA_VFINFO_LIST]) {
2081 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
2082 struct nlattr *attr;
2085 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
2086 if (nla_type(attr) != IFLA_VF_INFO ||
2087 nla_len(attr) < NLA_HDRLEN) {
2091 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
2092 ifla_vf_policy, NULL);
2095 err = do_setvfinfo(dev, vfinfo);
2098 status |= DO_SETLINK_NOTIFY;
2103 if (tb[IFLA_VF_PORTS]) {
2104 struct nlattr *port[IFLA_PORT_MAX+1];
2105 struct nlattr *attr;
2110 if (!ops->ndo_set_vf_port)
2113 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
2114 if (nla_type(attr) != IFLA_VF_PORT ||
2115 nla_len(attr) < NLA_HDRLEN) {
2119 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
2120 ifla_port_policy, NULL);
2123 if (!port[IFLA_PORT_VF]) {
2127 vf = nla_get_u32(port[IFLA_PORT_VF]);
2128 err = ops->ndo_set_vf_port(dev, vf, port);
2131 status |= DO_SETLINK_NOTIFY;
2136 if (tb[IFLA_PORT_SELF]) {
2137 struct nlattr *port[IFLA_PORT_MAX+1];
2139 err = nla_parse_nested(port, IFLA_PORT_MAX,
2140 tb[IFLA_PORT_SELF], ifla_port_policy,
2146 if (ops->ndo_set_vf_port)
2147 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2150 status |= DO_SETLINK_NOTIFY;
2153 if (tb[IFLA_AF_SPEC]) {
2157 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2158 const struct rtnl_af_ops *af_ops;
2160 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
2163 err = af_ops->set_link_af(dev, af);
2167 status |= DO_SETLINK_NOTIFY;
2172 if (tb[IFLA_PROTO_DOWN]) {
2173 err = dev_change_proto_down(dev,
2174 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2177 status |= DO_SETLINK_NOTIFY;
2181 struct nlattr *xdp[IFLA_XDP_MAX + 1];
2184 err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP],
2185 ifla_xdp_policy, NULL);
2189 if (xdp[IFLA_XDP_ATTACHED]) {
2194 if (xdp[IFLA_XDP_FLAGS]) {
2195 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
2196 if (xdp_flags & ~XDP_FLAGS_MASK) {
2200 if ((xdp_flags & XDP_FLAGS_SKB_MODE) &&
2201 (xdp_flags & XDP_FLAGS_DRV_MODE)) {
2207 if (xdp[IFLA_XDP_FD]) {
2208 err = dev_change_xdp_fd(dev, extack,
2209 nla_get_s32(xdp[IFLA_XDP_FD]),
2213 status |= DO_SETLINK_NOTIFY;
2218 if (status & DO_SETLINK_MODIFIED) {
2219 if (status & DO_SETLINK_NOTIFY)
2220 netdev_state_change(dev);
2223 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",
2230 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2231 struct netlink_ext_ack *extack)
2233 struct net *net = sock_net(skb->sk);
2234 struct ifinfomsg *ifm;
2235 struct net_device *dev;
2237 struct nlattr *tb[IFLA_MAX+1];
2238 char ifname[IFNAMSIZ];
2240 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy,
2245 if (tb[IFLA_IFNAME])
2246 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2251 ifm = nlmsg_data(nlh);
2252 if (ifm->ifi_index > 0)
2253 dev = __dev_get_by_index(net, ifm->ifi_index);
2254 else if (tb[IFLA_IFNAME])
2255 dev = __dev_get_by_name(net, ifname);
2264 err = validate_linkmsg(dev, tb);
2268 err = do_setlink(skb, dev, ifm, extack, tb, ifname, 0);
2273 static int rtnl_group_dellink(const struct net *net, int group)
2275 struct net_device *dev, *aux;
2276 LIST_HEAD(list_kill);
2282 for_each_netdev(net, dev) {
2283 if (dev->group == group) {
2284 const struct rtnl_link_ops *ops;
2287 ops = dev->rtnl_link_ops;
2288 if (!ops || !ops->dellink)
2296 for_each_netdev_safe(net, dev, aux) {
2297 if (dev->group == group) {
2298 const struct rtnl_link_ops *ops;
2300 ops = dev->rtnl_link_ops;
2301 ops->dellink(dev, &list_kill);
2304 unregister_netdevice_many(&list_kill);
2309 int rtnl_delete_link(struct net_device *dev)
2311 const struct rtnl_link_ops *ops;
2312 LIST_HEAD(list_kill);
2314 ops = dev->rtnl_link_ops;
2315 if (!ops || !ops->dellink)
2318 ops->dellink(dev, &list_kill);
2319 unregister_netdevice_many(&list_kill);
2323 EXPORT_SYMBOL_GPL(rtnl_delete_link);
2325 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
2326 struct netlink_ext_ack *extack)
2328 struct net *net = sock_net(skb->sk);
2329 struct net_device *dev;
2330 struct ifinfomsg *ifm;
2331 char ifname[IFNAMSIZ];
2332 struct nlattr *tb[IFLA_MAX+1];
2335 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
2339 if (tb[IFLA_IFNAME])
2340 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2342 ifm = nlmsg_data(nlh);
2343 if (ifm->ifi_index > 0)
2344 dev = __dev_get_by_index(net, ifm->ifi_index);
2345 else if (tb[IFLA_IFNAME])
2346 dev = __dev_get_by_name(net, ifname);
2347 else if (tb[IFLA_GROUP])
2348 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
2355 return rtnl_delete_link(dev);
2358 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2360 unsigned int old_flags;
2363 old_flags = dev->flags;
2364 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2365 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2370 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
2372 __dev_notify_flags(dev, old_flags, ~0U);
2375 EXPORT_SYMBOL(rtnl_configure_link);
2377 struct net_device *rtnl_create_link(struct net *net,
2378 const char *ifname, unsigned char name_assign_type,
2379 const struct rtnl_link_ops *ops, struct nlattr *tb[])
2381 struct net_device *dev;
2382 unsigned int num_tx_queues = 1;
2383 unsigned int num_rx_queues = 1;
2385 if (tb[IFLA_NUM_TX_QUEUES])
2386 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2387 else if (ops->get_num_tx_queues)
2388 num_tx_queues = ops->get_num_tx_queues();
2390 if (tb[IFLA_NUM_RX_QUEUES])
2391 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2392 else if (ops->get_num_rx_queues)
2393 num_rx_queues = ops->get_num_rx_queues();
2395 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
2396 ops->setup, num_tx_queues, num_rx_queues);
2398 return ERR_PTR(-ENOMEM);
2400 dev_net_set(dev, net);
2401 dev->rtnl_link_ops = ops;
2402 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
2405 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2406 if (tb[IFLA_ADDRESS]) {
2407 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2408 nla_len(tb[IFLA_ADDRESS]));
2409 dev->addr_assign_type = NET_ADDR_SET;
2411 if (tb[IFLA_BROADCAST])
2412 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2413 nla_len(tb[IFLA_BROADCAST]));
2414 if (tb[IFLA_TXQLEN])
2415 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2416 if (tb[IFLA_OPERSTATE])
2417 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2418 if (tb[IFLA_LINKMODE])
2419 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
2421 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2425 EXPORT_SYMBOL(rtnl_create_link);
2427 static int rtnl_group_changelink(const struct sk_buff *skb,
2428 struct net *net, int group,
2429 struct ifinfomsg *ifm,
2430 struct netlink_ext_ack *extack,
2433 struct net_device *dev, *aux;
2436 for_each_netdev_safe(net, dev, aux) {
2437 if (dev->group == group) {
2438 err = do_setlink(skb, dev, ifm, extack, tb, NULL, 0);
2447 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2448 struct netlink_ext_ack *extack)
2450 struct net *net = sock_net(skb->sk);
2451 const struct rtnl_link_ops *ops;
2452 const struct rtnl_link_ops *m_ops = NULL;
2453 struct net_device *dev;
2454 struct net_device *master_dev = NULL;
2455 struct ifinfomsg *ifm;
2456 char kind[MODULE_NAME_LEN];
2457 char ifname[IFNAMSIZ];
2458 struct nlattr *tb[IFLA_MAX+1];
2459 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
2460 unsigned char name_assign_type = NET_NAME_USER;
2463 #ifdef CONFIG_MODULES
2466 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
2470 if (tb[IFLA_IFNAME])
2471 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2475 ifm = nlmsg_data(nlh);
2476 if (ifm->ifi_index > 0)
2477 dev = __dev_get_by_index(net, ifm->ifi_index);
2480 dev = __dev_get_by_name(net, ifname);
2486 master_dev = netdev_master_upper_dev_get(dev);
2488 m_ops = master_dev->rtnl_link_ops;
2491 err = validate_linkmsg(dev, tb);
2495 if (tb[IFLA_LINKINFO]) {
2496 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2497 tb[IFLA_LINKINFO], ifla_info_policy,
2502 memset(linkinfo, 0, sizeof(linkinfo));
2504 if (linkinfo[IFLA_INFO_KIND]) {
2505 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2506 ops = rtnl_link_ops_get(kind);
2513 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2514 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
2515 struct nlattr **data = NULL;
2516 struct nlattr **slave_data = NULL;
2517 struct net *dest_net, *link_net = NULL;
2520 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2521 err = nla_parse_nested(attr, ops->maxtype,
2522 linkinfo[IFLA_INFO_DATA],
2528 if (ops->validate) {
2529 err = ops->validate(tb, data);
2536 if (m_ops->slave_maxtype &&
2537 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2538 err = nla_parse_nested(slave_attr,
2539 m_ops->slave_maxtype,
2540 linkinfo[IFLA_INFO_SLAVE_DATA],
2541 m_ops->slave_policy,
2545 slave_data = slave_attr;
2547 if (m_ops->slave_validate) {
2548 err = m_ops->slave_validate(tb, slave_data);
2557 if (nlh->nlmsg_flags & NLM_F_EXCL)
2559 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2562 if (linkinfo[IFLA_INFO_DATA]) {
2563 if (!ops || ops != dev->rtnl_link_ops ||
2567 err = ops->changelink(dev, tb, data);
2570 status |= DO_SETLINK_NOTIFY;
2573 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2574 if (!m_ops || !m_ops->slave_changelink)
2577 err = m_ops->slave_changelink(master_dev, dev,
2581 status |= DO_SETLINK_NOTIFY;
2584 return do_setlink(skb, dev, ifm, extack, tb, ifname,
2588 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2589 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
2590 return rtnl_group_changelink(skb, net,
2591 nla_get_u32(tb[IFLA_GROUP]),
2596 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
2600 #ifdef CONFIG_MODULES
2603 request_module("rtnl-link-%s", kind);
2605 ops = rtnl_link_ops_get(kind);
2617 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
2618 name_assign_type = NET_NAME_ENUM;
2621 dest_net = rtnl_link_get_net(net, tb);
2622 if (IS_ERR(dest_net))
2623 return PTR_ERR(dest_net);
2626 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2629 if (tb[IFLA_LINK_NETNSID]) {
2630 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2632 link_net = get_net_ns_by_id(dest_net, id);
2638 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2642 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2643 name_assign_type, ops, tb);
2649 dev->ifindex = ifm->ifi_index;
2652 err = ops->newlink(link_net ? : net, dev, tb, data);
2653 /* Drivers should call free_netdev() in ->destructor
2654 * and unregister it on failure after registration
2655 * so that device could be finally freed in rtnl_unlock.
2658 /* If device is not registered at all, free it now */
2659 if (dev->reg_state == NETREG_UNINITIALIZED)
2664 err = register_netdevice(dev);
2670 err = rtnl_configure_link(dev, ifm);
2672 goto out_unregister;
2674 err = dev_change_net_namespace(dev, dest_net, ifname);
2676 goto out_unregister;
2678 if (tb[IFLA_MASTER]) {
2679 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
2681 goto out_unregister;
2690 LIST_HEAD(list_kill);
2692 ops->dellink(dev, &list_kill);
2693 unregister_netdevice_many(&list_kill);
2695 unregister_netdevice(dev);
2701 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2702 struct netlink_ext_ack *extack)
2704 struct net *net = sock_net(skb->sk);
2705 struct ifinfomsg *ifm;
2706 char ifname[IFNAMSIZ];
2707 struct nlattr *tb[IFLA_MAX+1];
2708 struct net_device *dev = NULL;
2709 struct sk_buff *nskb;
2711 u32 ext_filter_mask = 0;
2713 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
2717 if (tb[IFLA_IFNAME])
2718 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2720 if (tb[IFLA_EXT_MASK])
2721 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2723 ifm = nlmsg_data(nlh);
2724 if (ifm->ifi_index > 0)
2725 dev = __dev_get_by_index(net, ifm->ifi_index);
2726 else if (tb[IFLA_IFNAME])
2727 dev = __dev_get_by_name(net, ifname);
2734 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
2738 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
2739 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
2741 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2742 WARN_ON(err == -EMSGSIZE);
2745 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
2750 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
2752 struct net *net = sock_net(skb->sk);
2753 struct net_device *dev;
2754 struct nlattr *tb[IFLA_MAX+1];
2755 u32 ext_filter_mask = 0;
2756 u16 min_ifinfo_dump_size = 0;
2759 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2760 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2761 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2763 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
2764 if (tb[IFLA_EXT_MASK])
2765 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2768 if (!ext_filter_mask)
2769 return NLMSG_GOODSIZE;
2771 * traverse the list of net devices and compute the minimum
2772 * buffer size based upon the filter mask.
2774 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2775 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2780 return nlmsg_total_size(min_ifinfo_dump_size);
2783 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
2786 int s_idx = cb->family;
2790 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
2791 int type = cb->nlh->nlmsg_type-RTM_BASE;
2792 if (idx < s_idx || idx == PF_PACKET)
2794 if (rtnl_msg_handlers[idx] == NULL ||
2795 rtnl_msg_handlers[idx][type].dumpit == NULL)
2798 memset(&cb->args[0], 0, sizeof(cb->args));
2802 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
2810 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2811 unsigned int change, gfp_t flags)
2813 struct net *net = dev_net(dev);
2814 struct sk_buff *skb;
2816 size_t if_info_size;
2818 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
2822 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
2824 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2825 WARN_ON(err == -EMSGSIZE);
2832 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2836 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2838 struct net *net = dev_net(dev);
2840 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2843 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2846 struct sk_buff *skb;
2848 if (dev->reg_state != NETREG_REGISTERED)
2851 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2853 rtmsg_ifinfo_send(skb, dev, flags);
2855 EXPORT_SYMBOL(rtmsg_ifinfo);
2857 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2858 struct net_device *dev,
2859 u8 *addr, u16 vid, u32 pid, u32 seq,
2860 int type, unsigned int flags,
2861 int nlflags, u16 ndm_state)
2863 struct nlmsghdr *nlh;
2866 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
2870 ndm = nlmsg_data(nlh);
2871 ndm->ndm_family = AF_BRIDGE;
2874 ndm->ndm_flags = flags;
2876 ndm->ndm_ifindex = dev->ifindex;
2877 ndm->ndm_state = ndm_state;
2879 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2880 goto nla_put_failure;
2882 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2883 goto nla_put_failure;
2885 nlmsg_end(skb, nlh);
2889 nlmsg_cancel(skb, nlh);
2893 static inline size_t rtnl_fdb_nlmsg_size(void)
2895 return NLMSG_ALIGN(sizeof(struct ndmsg)) +
2896 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */
2897 nla_total_size(sizeof(u16)) + /* NDA_VLAN */
2901 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
2904 struct net *net = dev_net(dev);
2905 struct sk_buff *skb;
2908 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2912 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
2913 0, 0, type, NTF_SELF, 0, ndm_state);
2919 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2922 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2926 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2928 int ndo_dflt_fdb_add(struct ndmsg *ndm,
2929 struct nlattr *tb[],
2930 struct net_device *dev,
2931 const unsigned char *addr, u16 vid,
2936 /* If aging addresses are supported device will need to
2937 * implement its own handler for this.
2939 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2940 pr_info("%s: FDB only supports static addresses\n", dev->name);
2945 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2949 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2950 err = dev_uc_add_excl(dev, addr);
2951 else if (is_multicast_ether_addr(addr))
2952 err = dev_mc_add_excl(dev, addr);
2954 /* Only return duplicate errors if NLM_F_EXCL is set */
2955 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2960 EXPORT_SYMBOL(ndo_dflt_fdb_add);
2962 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2967 if (nla_len(vlan_attr) != sizeof(u16)) {
2968 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2972 vid = nla_get_u16(vlan_attr);
2974 if (!vid || vid >= VLAN_VID_MASK) {
2975 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2984 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
2985 struct netlink_ext_ack *extack)
2987 struct net *net = sock_net(skb->sk);
2989 struct nlattr *tb[NDA_MAX+1];
2990 struct net_device *dev;
2995 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
2999 ndm = nlmsg_data(nlh);
3000 if (ndm->ndm_ifindex == 0) {
3001 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
3005 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3007 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
3011 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3012 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
3016 addr = nla_data(tb[NDA_LLADDR]);
3018 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
3024 /* Support fdb on master device the net/bridge default case */
3025 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3026 (dev->priv_flags & IFF_BRIDGE_PORT)) {
3027 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3028 const struct net_device_ops *ops = br_dev->netdev_ops;
3030 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
3035 ndm->ndm_flags &= ~NTF_MASTER;
3038 /* Embedded bridge, macvlan, and any other device support */
3039 if ((ndm->ndm_flags & NTF_SELF)) {
3040 if (dev->netdev_ops->ndo_fdb_add)
3041 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
3045 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
3049 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
3051 ndm->ndm_flags &= ~NTF_SELF;
3059 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
3061 int ndo_dflt_fdb_del(struct ndmsg *ndm,
3062 struct nlattr *tb[],
3063 struct net_device *dev,
3064 const unsigned char *addr, u16 vid)
3068 /* If aging addresses are supported device will need to
3069 * implement its own handler for this.
3071 if (!(ndm->ndm_state & NUD_PERMANENT)) {
3072 pr_info("%s: FDB only supports static addresses\n", dev->name);
3076 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3077 err = dev_uc_del(dev, addr);
3078 else if (is_multicast_ether_addr(addr))
3079 err = dev_mc_del(dev, addr);
3083 EXPORT_SYMBOL(ndo_dflt_fdb_del);
3085 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
3086 struct netlink_ext_ack *extack)
3088 struct net *net = sock_net(skb->sk);
3090 struct nlattr *tb[NDA_MAX+1];
3091 struct net_device *dev;
3096 if (!netlink_capable(skb, CAP_NET_ADMIN))
3099 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
3103 ndm = nlmsg_data(nlh);
3104 if (ndm->ndm_ifindex == 0) {
3105 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
3109 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3111 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
3115 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3116 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
3120 addr = nla_data(tb[NDA_LLADDR]);
3122 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
3128 /* Support fdb on master device the net/bridge default case */
3129 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3130 (dev->priv_flags & IFF_BRIDGE_PORT)) {
3131 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3132 const struct net_device_ops *ops = br_dev->netdev_ops;
3134 if (ops->ndo_fdb_del)
3135 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
3140 ndm->ndm_flags &= ~NTF_MASTER;
3143 /* Embedded bridge, macvlan, and any other device support */
3144 if (ndm->ndm_flags & NTF_SELF) {
3145 if (dev->netdev_ops->ndo_fdb_del)
3146 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
3149 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
3152 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
3154 ndm->ndm_flags &= ~NTF_SELF;
3161 static int nlmsg_populate_fdb(struct sk_buff *skb,
3162 struct netlink_callback *cb,
3163 struct net_device *dev,
3165 struct netdev_hw_addr_list *list)
3167 struct netdev_hw_addr *ha;
3171 portid = NETLINK_CB(cb->skb).portid;
3172 seq = cb->nlh->nlmsg_seq;
3174 list_for_each_entry(ha, &list->list, list) {
3175 if (*idx < cb->args[2])
3178 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
3180 RTM_NEWNEIGH, NTF_SELF,
3181 NLM_F_MULTI, NUD_PERMANENT);
3191 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
3192 * @nlh: netlink message header
3195 * Default netdevice operation to dump the existing unicast address list.
3196 * Returns number of addresses from list put in skb.
3198 int ndo_dflt_fdb_dump(struct sk_buff *skb,
3199 struct netlink_callback *cb,
3200 struct net_device *dev,
3201 struct net_device *filter_dev,
3206 netif_addr_lock_bh(dev);
3207 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
3210 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
3212 netif_addr_unlock_bh(dev);
3215 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3217 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3219 struct net_device *dev;
3220 struct nlattr *tb[IFLA_MAX+1];
3221 struct net_device *br_dev = NULL;
3222 const struct net_device_ops *ops = NULL;
3223 const struct net_device_ops *cops = NULL;
3224 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3225 struct net *net = sock_net(skb->sk);
3226 struct hlist_head *head;
3234 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb,
3235 IFLA_MAX, ifla_policy, NULL) == 0) {
3236 if (tb[IFLA_MASTER])
3237 br_idx = nla_get_u32(tb[IFLA_MASTER]);
3240 brport_idx = ifm->ifi_index;
3243 br_dev = __dev_get_by_index(net, br_idx);
3247 ops = br_dev->netdev_ops;
3251 s_idx = cb->args[1];
3253 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3255 head = &net->dev_index_head[h];
3256 hlist_for_each_entry(dev, head, index_hlist) {
3258 if (brport_idx && (dev->ifindex != brport_idx))
3261 if (!br_idx) { /* user did not specify a specific bridge */
3262 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3263 br_dev = netdev_master_upper_dev_get(dev);
3264 cops = br_dev->netdev_ops;
3267 if (dev != br_dev &&
3268 !(dev->priv_flags & IFF_BRIDGE_PORT))
3271 if (br_dev != netdev_master_upper_dev_get(dev) &&
3272 !(dev->priv_flags & IFF_EBRIDGE))
3280 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3281 if (cops && cops->ndo_fdb_dump) {
3282 err = cops->ndo_fdb_dump(skb, cb,
3285 if (err == -EMSGSIZE)
3290 if (dev->netdev_ops->ndo_fdb_dump)
3291 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
3295 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
3297 if (err == -EMSGSIZE)
3302 /* reset fdb offset to 0 for rest of the interfaces */
3318 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3319 unsigned int attrnum, unsigned int flag)
3322 return nla_put_u8(skb, attrnum, !!(flags & flag));
3326 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
3327 struct net_device *dev, u16 mode,
3328 u32 flags, u32 mask, int nlflags,
3330 int (*vlan_fill)(struct sk_buff *skb,
3331 struct net_device *dev,
3334 struct nlmsghdr *nlh;
3335 struct ifinfomsg *ifm;
3336 struct nlattr *br_afspec;
3337 struct nlattr *protinfo;
3338 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
3339 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3342 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
3346 ifm = nlmsg_data(nlh);
3347 ifm->ifi_family = AF_BRIDGE;
3349 ifm->ifi_type = dev->type;
3350 ifm->ifi_index = dev->ifindex;
3351 ifm->ifi_flags = dev_get_flags(dev);
3352 ifm->ifi_change = 0;
3355 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3356 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3357 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
3359 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
3361 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
3362 (dev->ifindex != dev_get_iflink(dev) &&
3363 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
3364 goto nla_put_failure;
3366 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3368 goto nla_put_failure;
3370 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
3371 nla_nest_cancel(skb, br_afspec);
3372 goto nla_put_failure;
3375 if (mode != BRIDGE_MODE_UNDEF) {
3376 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3377 nla_nest_cancel(skb, br_afspec);
3378 goto nla_put_failure;
3382 err = vlan_fill(skb, dev, filter_mask);
3384 nla_nest_cancel(skb, br_afspec);
3385 goto nla_put_failure;
3388 nla_nest_end(skb, br_afspec);
3390 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3392 goto nla_put_failure;
3394 if (brport_nla_put_flag(skb, flags, mask,
3395 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3396 brport_nla_put_flag(skb, flags, mask,
3397 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3398 brport_nla_put_flag(skb, flags, mask,
3399 IFLA_BRPORT_FAST_LEAVE,
3400 BR_MULTICAST_FAST_LEAVE) ||
3401 brport_nla_put_flag(skb, flags, mask,
3402 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3403 brport_nla_put_flag(skb, flags, mask,
3404 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3405 brport_nla_put_flag(skb, flags, mask,
3406 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3407 brport_nla_put_flag(skb, flags, mask,
3408 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3409 brport_nla_put_flag(skb, flags, mask,
3410 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3411 nla_nest_cancel(skb, protinfo);
3412 goto nla_put_failure;
3415 nla_nest_end(skb, protinfo);
3417 nlmsg_end(skb, nlh);
3420 nlmsg_cancel(skb, nlh);
3421 return err ? err : -EMSGSIZE;
3423 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
3425 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3427 struct net *net = sock_net(skb->sk);
3428 struct net_device *dev;
3430 u32 portid = NETLINK_CB(cb->skb).portid;
3431 u32 seq = cb->nlh->nlmsg_seq;
3432 u32 filter_mask = 0;
3435 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3436 struct nlattr *extfilt;
3438 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3441 if (nla_len(extfilt) < sizeof(filter_mask))
3444 filter_mask = nla_get_u32(extfilt);
3449 for_each_netdev_rcu(net, dev) {
3450 const struct net_device_ops *ops = dev->netdev_ops;
3451 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3453 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
3454 if (idx >= cb->args[0]) {
3455 err = br_dev->netdev_ops->ndo_bridge_getlink(
3456 skb, portid, seq, dev,
3457 filter_mask, NLM_F_MULTI);
3458 if (err < 0 && err != -EOPNOTSUPP) {
3459 if (likely(skb->len))
3468 if (ops->ndo_bridge_getlink) {
3469 if (idx >= cb->args[0]) {
3470 err = ops->ndo_bridge_getlink(skb, portid,
3474 if (err < 0 && err != -EOPNOTSUPP) {
3475 if (likely(skb->len))
3492 static inline size_t bridge_nlmsg_size(void)
3494 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3495 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3496 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3497 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3498 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3499 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3500 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3501 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3502 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3503 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3504 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3507 static int rtnl_bridge_notify(struct net_device *dev)
3509 struct net *net = dev_net(dev);
3510 struct sk_buff *skb;
3511 int err = -EOPNOTSUPP;
3513 if (!dev->netdev_ops->ndo_bridge_getlink)
3516 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3522 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
3529 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3532 WARN_ON(err == -EMSGSIZE);
3535 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
3539 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3540 struct netlink_ext_ack *extack)
3542 struct net *net = sock_net(skb->sk);
3543 struct ifinfomsg *ifm;
3544 struct net_device *dev;
3545 struct nlattr *br_spec, *attr = NULL;
3546 int rem, err = -EOPNOTSUPP;
3548 bool have_flags = false;
3550 if (nlmsg_len(nlh) < sizeof(*ifm))
3553 ifm = nlmsg_data(nlh);
3554 if (ifm->ifi_family != AF_BRIDGE)
3555 return -EPFNOSUPPORT;
3557 dev = __dev_get_by_index(net, ifm->ifi_index);
3559 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3563 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3565 nla_for_each_nested(attr, br_spec, rem) {
3566 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3567 if (nla_len(attr) < sizeof(flags))
3571 flags = nla_get_u16(attr);
3577 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3578 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3580 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
3585 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
3589 flags &= ~BRIDGE_FLAGS_MASTER;
3592 if ((flags & BRIDGE_FLAGS_SELF)) {
3593 if (!dev->netdev_ops->ndo_bridge_setlink)
3596 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3599 flags &= ~BRIDGE_FLAGS_SELF;
3601 /* Generate event to notify upper layer of bridge
3604 err = rtnl_bridge_notify(dev);
3609 memcpy(nla_data(attr), &flags, sizeof(flags));
3614 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
3615 struct netlink_ext_ack *extack)
3617 struct net *net = sock_net(skb->sk);
3618 struct ifinfomsg *ifm;
3619 struct net_device *dev;
3620 struct nlattr *br_spec, *attr = NULL;
3621 int rem, err = -EOPNOTSUPP;
3623 bool have_flags = false;
3625 if (nlmsg_len(nlh) < sizeof(*ifm))
3628 ifm = nlmsg_data(nlh);
3629 if (ifm->ifi_family != AF_BRIDGE)
3630 return -EPFNOSUPPORT;
3632 dev = __dev_get_by_index(net, ifm->ifi_index);
3634 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3638 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3640 nla_for_each_nested(attr, br_spec, rem) {
3641 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3642 if (nla_len(attr) < sizeof(flags))
3646 flags = nla_get_u16(attr);
3652 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3653 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3655 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3660 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
3664 flags &= ~BRIDGE_FLAGS_MASTER;
3667 if ((flags & BRIDGE_FLAGS_SELF)) {
3668 if (!dev->netdev_ops->ndo_bridge_dellink)
3671 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3675 flags &= ~BRIDGE_FLAGS_SELF;
3677 /* Generate event to notify upper layer of bridge
3680 err = rtnl_bridge_notify(dev);
3685 memcpy(nla_data(attr), &flags, sizeof(flags));
3690 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
3692 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
3693 (!idxattr || idxattr == attrid);
3696 #define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1)
3697 static int rtnl_get_offload_stats_attr_size(int attr_id)
3700 case IFLA_OFFLOAD_XSTATS_CPU_HIT:
3701 return sizeof(struct rtnl_link_stats64);
3707 static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev,
3710 struct nlattr *attr = NULL;
3715 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
3716 dev->netdev_ops->ndo_get_offload_stats))
3719 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
3720 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
3721 if (attr_id < *prividx)
3724 size = rtnl_get_offload_stats_attr_size(attr_id);
3728 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
3731 attr = nla_reserve_64bit(skb, attr_id, size,
3732 IFLA_OFFLOAD_XSTATS_UNSPEC);
3734 goto nla_put_failure;
3736 attr_data = nla_data(attr);
3737 memset(attr_data, 0, size);
3738 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev,
3741 goto get_offload_stats_failure;
3752 get_offload_stats_failure:
3757 static int rtnl_get_offload_stats_size(const struct net_device *dev)
3763 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
3764 dev->netdev_ops->ndo_get_offload_stats))
3767 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
3768 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
3769 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
3771 size = rtnl_get_offload_stats_attr_size(attr_id);
3772 nla_size += nla_total_size_64bit(size);
3776 nla_size += nla_total_size(0);
3781 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
3782 int type, u32 pid, u32 seq, u32 change,
3783 unsigned int flags, unsigned int filter_mask,
3784 int *idxattr, int *prividx)
3786 struct if_stats_msg *ifsm;
3787 struct nlmsghdr *nlh;
3788 struct nlattr *attr;
3789 int s_prividx = *prividx;
3794 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
3798 ifsm = nlmsg_data(nlh);
3799 ifsm->ifindex = dev->ifindex;
3800 ifsm->filter_mask = filter_mask;
3802 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
3803 struct rtnl_link_stats64 *sp;
3805 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
3806 sizeof(struct rtnl_link_stats64),
3809 goto nla_put_failure;
3811 sp = nla_data(attr);
3812 dev_get_stats(dev, sp);
3815 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
3816 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3818 if (ops && ops->fill_linkxstats) {
3819 *idxattr = IFLA_STATS_LINK_XSTATS;
3820 attr = nla_nest_start(skb,
3821 IFLA_STATS_LINK_XSTATS);
3823 goto nla_put_failure;
3825 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
3826 nla_nest_end(skb, attr);
3828 goto nla_put_failure;
3833 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
3835 const struct rtnl_link_ops *ops = NULL;
3836 const struct net_device *master;
3838 master = netdev_master_upper_dev_get(dev);
3840 ops = master->rtnl_link_ops;
3841 if (ops && ops->fill_linkxstats) {
3842 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
3843 attr = nla_nest_start(skb,
3844 IFLA_STATS_LINK_XSTATS_SLAVE);
3846 goto nla_put_failure;
3848 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
3849 nla_nest_end(skb, attr);
3851 goto nla_put_failure;
3856 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
3858 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
3859 attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS);
3861 goto nla_put_failure;
3863 err = rtnl_get_offload_stats(skb, dev, prividx);
3864 if (err == -ENODATA)
3865 nla_nest_cancel(skb, attr);
3867 nla_nest_end(skb, attr);
3869 if (err && err != -ENODATA)
3870 goto nla_put_failure;
3874 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
3875 struct rtnl_af_ops *af_ops;
3877 *idxattr = IFLA_STATS_AF_SPEC;
3878 attr = nla_nest_start(skb, IFLA_STATS_AF_SPEC);
3880 goto nla_put_failure;
3882 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
3883 if (af_ops->fill_stats_af) {
3887 af = nla_nest_start(skb, af_ops->family);
3889 goto nla_put_failure;
3891 err = af_ops->fill_stats_af(skb, dev);
3893 if (err == -ENODATA)
3894 nla_nest_cancel(skb, af);
3896 goto nla_put_failure;
3898 nla_nest_end(skb, af);
3902 nla_nest_end(skb, attr);
3907 nlmsg_end(skb, nlh);
3912 /* not a multi message or no progress mean a real error */
3913 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
3914 nlmsg_cancel(skb, nlh);
3916 nlmsg_end(skb, nlh);
3921 static size_t if_nlmsg_stats_size(const struct net_device *dev,
3926 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
3927 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
3929 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
3930 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3931 int attr = IFLA_STATS_LINK_XSTATS;
3933 if (ops && ops->get_linkxstats_size) {
3934 size += nla_total_size(ops->get_linkxstats_size(dev,
3936 /* for IFLA_STATS_LINK_XSTATS */
3937 size += nla_total_size(0);
3941 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
3942 struct net_device *_dev = (struct net_device *)dev;
3943 const struct rtnl_link_ops *ops = NULL;
3944 const struct net_device *master;
3946 /* netdev_master_upper_dev_get can't take const */
3947 master = netdev_master_upper_dev_get(_dev);
3949 ops = master->rtnl_link_ops;
3950 if (ops && ops->get_linkxstats_size) {
3951 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
3953 size += nla_total_size(ops->get_linkxstats_size(dev,
3955 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
3956 size += nla_total_size(0);
3960 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
3961 size += rtnl_get_offload_stats_size(dev);
3963 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
3964 struct rtnl_af_ops *af_ops;
3966 /* for IFLA_STATS_AF_SPEC */
3967 size += nla_total_size(0);
3969 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
3970 if (af_ops->get_stats_af_size) {
3971 size += nla_total_size(
3972 af_ops->get_stats_af_size(dev));
3975 size += nla_total_size(0);
3983 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
3984 struct netlink_ext_ack *extack)
3986 struct net *net = sock_net(skb->sk);
3987 struct net_device *dev = NULL;
3988 int idxattr = 0, prividx = 0;
3989 struct if_stats_msg *ifsm;
3990 struct sk_buff *nskb;
3994 if (nlmsg_len(nlh) < sizeof(*ifsm))
3997 ifsm = nlmsg_data(nlh);
3998 if (ifsm->ifindex > 0)
3999 dev = __dev_get_by_index(net, ifsm->ifindex);
4006 filter_mask = ifsm->filter_mask;
4010 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
4014 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
4015 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
4016 0, filter_mask, &idxattr, &prividx);
4018 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
4019 WARN_ON(err == -EMSGSIZE);
4022 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
4028 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
4030 int h, s_h, err, s_idx, s_idxattr, s_prividx;
4031 struct net *net = sock_net(skb->sk);
4032 unsigned int flags = NLM_F_MULTI;
4033 struct if_stats_msg *ifsm;
4034 struct hlist_head *head;
4035 struct net_device *dev;
4036 u32 filter_mask = 0;
4040 s_idx = cb->args[1];
4041 s_idxattr = cb->args[2];
4042 s_prividx = cb->args[3];
4044 cb->seq = net->dev_base_seq;
4046 if (nlmsg_len(cb->nlh) < sizeof(*ifsm))
4049 ifsm = nlmsg_data(cb->nlh);
4050 filter_mask = ifsm->filter_mask;
4054 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4056 head = &net->dev_index_head[h];
4057 hlist_for_each_entry(dev, head, index_hlist) {
4060 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
4061 NETLINK_CB(cb->skb).portid,
4062 cb->nlh->nlmsg_seq, 0,
4064 &s_idxattr, &s_prividx);
4065 /* If we ran out of room on the first message,
4068 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
4074 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
4080 cb->args[3] = s_prividx;
4081 cb->args[2] = s_idxattr;
4088 /* Process one rtnetlink message. */
4090 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
4091 struct netlink_ext_ack *extack)
4093 struct net *net = sock_net(skb->sk);
4094 rtnl_doit_func doit;
4100 type = nlh->nlmsg_type;
4106 /* All the messages must have at least 1 byte length */
4107 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
4110 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
4113 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
4116 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
4118 rtnl_dumpit_func dumpit;
4119 rtnl_calcit_func calcit;
4120 u16 min_dump_alloc = 0;
4122 dumpit = rtnl_get_dumpit(family, type);
4125 calcit = rtnl_get_calcit(family, type);
4127 min_dump_alloc = calcit(skb, nlh);
4132 struct netlink_dump_control c = {
4134 .min_dump_alloc = min_dump_alloc,
4136 err = netlink_dump_start(rtnl, skb, nlh, &c);
4142 doit = rtnl_get_doit(family, type);
4146 return doit(skb, nlh, extack);
4149 static void rtnetlink_rcv(struct sk_buff *skb)
4152 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
4156 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
4158 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
4162 case NETDEV_CHANGENAME:
4163 case NETDEV_FEAT_CHANGE:
4164 case NETDEV_BONDING_FAILOVER:
4165 case NETDEV_NOTIFY_PEERS:
4166 case NETDEV_RESEND_IGMP:
4167 case NETDEV_CHANGEINFODATA:
4168 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
4176 static struct notifier_block rtnetlink_dev_notifier = {
4177 .notifier_call = rtnetlink_event,
4181 static int __net_init rtnetlink_net_init(struct net *net)
4184 struct netlink_kernel_cfg cfg = {
4185 .groups = RTNLGRP_MAX,
4186 .input = rtnetlink_rcv,
4187 .cb_mutex = &rtnl_mutex,
4188 .flags = NL_CFG_F_NONROOT_RECV,
4191 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
4198 static void __net_exit rtnetlink_net_exit(struct net *net)
4200 netlink_kernel_release(net->rtnl);
4204 static struct pernet_operations rtnetlink_net_ops = {
4205 .init = rtnetlink_net_init,
4206 .exit = rtnetlink_net_exit,
4209 void __init rtnetlink_init(void)
4211 if (register_pernet_subsys(&rtnetlink_net_ops))
4212 panic("rtnetlink_init: cannot initialize rtnetlink\n");
4214 register_netdevice_notifier(&rtnetlink_dev_notifier);
4216 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
4217 rtnl_dump_ifinfo, rtnl_calcit);
4218 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
4219 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
4220 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
4222 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
4223 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
4224 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, NULL);
4226 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
4227 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
4228 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
4230 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
4231 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
4232 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
4234 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,