2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Routing netlink socket interface: protocol independent part.
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
19 #include <linux/bitops.h>
20 #include <linux/errno.h>
21 #include <linux/module.h>
22 #include <linux/types.h>
23 #include <linux/socket.h>
24 #include <linux/kernel.h>
25 #include <linux/timer.h>
26 #include <linux/string.h>
27 #include <linux/sockios.h>
28 #include <linux/net.h>
29 #include <linux/fcntl.h>
31 #include <linux/slab.h>
32 #include <linux/interrupt.h>
33 #include <linux/capability.h>
34 #include <linux/skbuff.h>
35 #include <linux/init.h>
36 #include <linux/security.h>
37 #include <linux/mutex.h>
38 #include <linux/if_addr.h>
39 #include <linux/if_bridge.h>
40 #include <linux/if_vlan.h>
41 #include <linux/pci.h>
42 #include <linux/etherdevice.h>
43 #include <linux/bpf.h>
45 #include <linux/uaccess.h>
47 #include <linux/inet.h>
48 #include <linux/netdevice.h>
49 #include <net/switchdev.h>
51 #include <net/protocol.h>
53 #include <net/route.h>
57 #include <net/pkt_sched.h>
58 #include <net/fib_rules.h>
59 #include <net/rtnetlink.h>
60 #include <net/net_namespace.h>
62 #define RTNL_MAX_TYPE 50
63 #define RTNL_SLAVE_MAX_TYPE 36
67 rtnl_dumpit_func dumpit;
73 static DEFINE_MUTEX(rtnl_mutex);
77 mutex_lock(&rtnl_mutex);
79 EXPORT_SYMBOL(rtnl_lock);
81 int rtnl_lock_killable(void)
83 return mutex_lock_killable(&rtnl_mutex);
85 EXPORT_SYMBOL(rtnl_lock_killable);
87 static struct sk_buff *defer_kfree_skb_list;
88 void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
91 tail->next = defer_kfree_skb_list;
92 defer_kfree_skb_list = head;
95 EXPORT_SYMBOL(rtnl_kfree_skbs);
97 void __rtnl_unlock(void)
99 struct sk_buff *head = defer_kfree_skb_list;
101 defer_kfree_skb_list = NULL;
103 mutex_unlock(&rtnl_mutex);
106 struct sk_buff *next = head->next;
114 void rtnl_unlock(void)
116 /* This fellow will unlock it for us. */
119 EXPORT_SYMBOL(rtnl_unlock);
121 int rtnl_trylock(void)
123 return mutex_trylock(&rtnl_mutex);
125 EXPORT_SYMBOL(rtnl_trylock);
127 int rtnl_is_locked(void)
129 return mutex_is_locked(&rtnl_mutex);
131 EXPORT_SYMBOL(rtnl_is_locked);
133 bool refcount_dec_and_rtnl_lock(refcount_t *r)
135 return refcount_dec_and_mutex_lock(r, &rtnl_mutex);
137 EXPORT_SYMBOL(refcount_dec_and_rtnl_lock);
139 #ifdef CONFIG_PROVE_LOCKING
140 bool lockdep_rtnl_is_held(void)
142 return lockdep_is_held(&rtnl_mutex);
144 EXPORT_SYMBOL(lockdep_rtnl_is_held);
145 #endif /* #ifdef CONFIG_PROVE_LOCKING */
147 static struct rtnl_link *__rcu *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
149 static inline int rtm_msgindex(int msgtype)
151 int msgindex = msgtype - RTM_BASE;
154 * msgindex < 0 implies someone tried to register a netlink
155 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
156 * the message type has not been added to linux/rtnetlink.h
158 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
163 static struct rtnl_link *rtnl_get_link(int protocol, int msgtype)
165 struct rtnl_link **tab;
167 if (protocol >= ARRAY_SIZE(rtnl_msg_handlers))
168 protocol = PF_UNSPEC;
170 tab = rcu_dereference_rtnl(rtnl_msg_handlers[protocol]);
172 tab = rcu_dereference_rtnl(rtnl_msg_handlers[PF_UNSPEC]);
177 static int rtnl_register_internal(struct module *owner,
178 int protocol, int msgtype,
179 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
182 struct rtnl_link *link, *old;
183 struct rtnl_link __rcu **tab;
187 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
188 msgindex = rtm_msgindex(msgtype);
191 tab = rtnl_msg_handlers[protocol];
193 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(void *), GFP_KERNEL);
197 /* ensures we see the 0 stores */
198 rcu_assign_pointer(rtnl_msg_handlers[protocol], tab);
201 old = rtnl_dereference(tab[msgindex]);
203 link = kmemdup(old, sizeof(*old), GFP_KERNEL);
207 link = kzalloc(sizeof(*link), GFP_KERNEL);
212 WARN_ON(link->owner && link->owner != owner);
215 WARN_ON(doit && link->doit && link->doit != doit);
218 WARN_ON(dumpit && link->dumpit && link->dumpit != dumpit);
220 link->dumpit = dumpit;
222 link->flags |= flags;
224 /* publish protocol:msgtype */
225 rcu_assign_pointer(tab[msgindex], link);
235 * rtnl_register_module - Register a rtnetlink message type
237 * @owner: module registering the hook (THIS_MODULE)
238 * @protocol: Protocol family or PF_UNSPEC
239 * @msgtype: rtnetlink message type
240 * @doit: Function pointer called for each request message
241 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
242 * @flags: rtnl_link_flags to modifiy behaviour of doit/dumpit functions
244 * Like rtnl_register, but for use by removable modules.
246 int rtnl_register_module(struct module *owner,
247 int protocol, int msgtype,
248 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
251 return rtnl_register_internal(owner, protocol, msgtype,
252 doit, dumpit, flags);
254 EXPORT_SYMBOL_GPL(rtnl_register_module);
257 * rtnl_register - Register a rtnetlink message type
258 * @protocol: Protocol family or PF_UNSPEC
259 * @msgtype: rtnetlink message type
260 * @doit: Function pointer called for each request message
261 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
262 * @flags: rtnl_link_flags to modifiy behaviour of doit/dumpit functions
264 * Registers the specified function pointers (at least one of them has
265 * to be non-NULL) to be called whenever a request message for the
266 * specified protocol family and message type is received.
268 * The special protocol family PF_UNSPEC may be used to define fallback
269 * function pointers for the case when no entry for the specific protocol
272 void rtnl_register(int protocol, int msgtype,
273 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
278 err = rtnl_register_internal(NULL, protocol, msgtype, doit, dumpit,
281 pr_err("Unable to register rtnetlink message handler, "
282 "protocol = %d, message type = %d\n", protocol, msgtype);
286 * rtnl_unregister - Unregister a rtnetlink message type
287 * @protocol: Protocol family or PF_UNSPEC
288 * @msgtype: rtnetlink message type
290 * Returns 0 on success or a negative error code.
292 int rtnl_unregister(int protocol, int msgtype)
294 struct rtnl_link **tab, *link;
297 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
298 msgindex = rtm_msgindex(msgtype);
301 tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
307 link = tab[msgindex];
308 rcu_assign_pointer(tab[msgindex], NULL);
311 kfree_rcu(link, rcu);
315 EXPORT_SYMBOL_GPL(rtnl_unregister);
318 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
319 * @protocol : Protocol family or PF_UNSPEC
321 * Identical to calling rtnl_unregster() for all registered message types
322 * of a certain protocol family.
324 void rtnl_unregister_all(int protocol)
326 struct rtnl_link **tab, *link;
329 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
332 tab = rtnl_msg_handlers[protocol];
337 RCU_INIT_POINTER(rtnl_msg_handlers[protocol], NULL);
338 for (msgindex = 0; msgindex < RTM_NR_MSGTYPES; msgindex++) {
339 link = tab[msgindex];
343 rcu_assign_pointer(tab[msgindex], NULL);
344 kfree_rcu(link, rcu);
352 EXPORT_SYMBOL_GPL(rtnl_unregister_all);
354 static LIST_HEAD(link_ops);
356 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
358 const struct rtnl_link_ops *ops;
360 list_for_each_entry(ops, &link_ops, list) {
361 if (!strcmp(ops->kind, kind))
368 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
369 * @ops: struct rtnl_link_ops * to register
371 * The caller must hold the rtnl_mutex. This function should be used
372 * by drivers that create devices during module initialization. It
373 * must be called before registering the devices.
375 * Returns 0 on success or a negative error code.
377 int __rtnl_link_register(struct rtnl_link_ops *ops)
379 if (rtnl_link_ops_get(ops->kind))
382 /* The check for setup is here because if ops
383 * does not have that filled up, it is not possible
384 * to use the ops for creating device. So do not
385 * fill up dellink as well. That disables rtnl_dellink.
387 if (ops->setup && !ops->dellink)
388 ops->dellink = unregister_netdevice_queue;
390 list_add_tail(&ops->list, &link_ops);
393 EXPORT_SYMBOL_GPL(__rtnl_link_register);
396 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
397 * @ops: struct rtnl_link_ops * to register
399 * Returns 0 on success or a negative error code.
401 int rtnl_link_register(struct rtnl_link_ops *ops)
405 /* Sanity-check max sizes to avoid stack buffer overflow. */
406 if (WARN_ON(ops->maxtype > RTNL_MAX_TYPE ||
407 ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE))
411 err = __rtnl_link_register(ops);
415 EXPORT_SYMBOL_GPL(rtnl_link_register);
417 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
419 struct net_device *dev;
420 LIST_HEAD(list_kill);
422 for_each_netdev(net, dev) {
423 if (dev->rtnl_link_ops == ops)
424 ops->dellink(dev, &list_kill);
426 unregister_netdevice_many(&list_kill);
430 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
431 * @ops: struct rtnl_link_ops * to unregister
433 * The caller must hold the rtnl_mutex and guarantee net_namespace_list
434 * integrity (hold pernet_ops_rwsem for writing to close the race
435 * with setup_net() and cleanup_net()).
437 void __rtnl_link_unregister(struct rtnl_link_ops *ops)
442 __rtnl_kill_links(net, ops);
444 list_del(&ops->list);
446 EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
448 /* Return with the rtnl_lock held when there are no network
449 * devices unregistering in any network namespace.
451 static void rtnl_lock_unregistering_all(void)
455 DEFINE_WAIT_FUNC(wait, woken_wake_function);
457 add_wait_queue(&netdev_unregistering_wq, &wait);
459 unregistering = false;
461 /* We held write locked pernet_ops_rwsem, and parallel
462 * setup_net() and cleanup_net() are not possible.
465 if (net->dev_unreg_count > 0) {
466 unregistering = true;
474 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
476 remove_wait_queue(&netdev_unregistering_wq, &wait);
480 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
481 * @ops: struct rtnl_link_ops * to unregister
483 void rtnl_link_unregister(struct rtnl_link_ops *ops)
485 /* Close the race with setup_net() and cleanup_net() */
486 down_write(&pernet_ops_rwsem);
487 rtnl_lock_unregistering_all();
488 __rtnl_link_unregister(ops);
490 up_write(&pernet_ops_rwsem);
492 EXPORT_SYMBOL_GPL(rtnl_link_unregister);
494 static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
496 struct net_device *master_dev;
497 const struct rtnl_link_ops *ops;
502 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
506 ops = master_dev->rtnl_link_ops;
507 if (!ops || !ops->get_slave_size)
509 /* IFLA_INFO_SLAVE_DATA + nested data */
510 size = nla_total_size(sizeof(struct nlattr)) +
511 ops->get_slave_size(master_dev, dev);
518 static size_t rtnl_link_get_size(const struct net_device *dev)
520 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
526 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
527 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
530 /* IFLA_INFO_DATA + nested data */
531 size += nla_total_size(sizeof(struct nlattr)) +
534 if (ops->get_xstats_size)
535 /* IFLA_INFO_XSTATS */
536 size += nla_total_size(ops->get_xstats_size(dev));
538 size += rtnl_link_get_slave_info_data_size(dev);
543 static LIST_HEAD(rtnl_af_ops);
545 static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
547 const struct rtnl_af_ops *ops;
549 list_for_each_entry_rcu(ops, &rtnl_af_ops, list) {
550 if (ops->family == family)
558 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
559 * @ops: struct rtnl_af_ops * to register
561 * Returns 0 on success or a negative error code.
563 void rtnl_af_register(struct rtnl_af_ops *ops)
566 list_add_tail_rcu(&ops->list, &rtnl_af_ops);
569 EXPORT_SYMBOL_GPL(rtnl_af_register);
572 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
573 * @ops: struct rtnl_af_ops * to unregister
575 void rtnl_af_unregister(struct rtnl_af_ops *ops)
578 list_del_rcu(&ops->list);
583 EXPORT_SYMBOL_GPL(rtnl_af_unregister);
585 static size_t rtnl_link_get_af_size(const struct net_device *dev,
588 struct rtnl_af_ops *af_ops;
592 size = nla_total_size(sizeof(struct nlattr));
595 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
596 if (af_ops->get_link_af_size) {
597 /* AF_* + nested data */
598 size += nla_total_size(sizeof(struct nlattr)) +
599 af_ops->get_link_af_size(dev, ext_filter_mask);
607 static bool rtnl_have_link_slave_info(const struct net_device *dev)
609 struct net_device *master_dev;
614 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
615 if (master_dev && master_dev->rtnl_link_ops)
621 static int rtnl_link_slave_info_fill(struct sk_buff *skb,
622 const struct net_device *dev)
624 struct net_device *master_dev;
625 const struct rtnl_link_ops *ops;
626 struct nlattr *slave_data;
629 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
632 ops = master_dev->rtnl_link_ops;
635 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
637 if (ops->fill_slave_info) {
638 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
641 err = ops->fill_slave_info(skb, master_dev, dev);
643 goto err_cancel_slave_data;
644 nla_nest_end(skb, slave_data);
648 err_cancel_slave_data:
649 nla_nest_cancel(skb, slave_data);
653 static int rtnl_link_info_fill(struct sk_buff *skb,
654 const struct net_device *dev)
656 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
662 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
664 if (ops->fill_xstats) {
665 err = ops->fill_xstats(skb, dev);
669 if (ops->fill_info) {
670 data = nla_nest_start(skb, IFLA_INFO_DATA);
673 err = ops->fill_info(skb, dev);
675 goto err_cancel_data;
676 nla_nest_end(skb, data);
681 nla_nest_cancel(skb, data);
685 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
687 struct nlattr *linkinfo;
690 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
691 if (linkinfo == NULL)
694 err = rtnl_link_info_fill(skb, dev);
696 goto err_cancel_link;
698 err = rtnl_link_slave_info_fill(skb, dev);
700 goto err_cancel_link;
702 nla_nest_end(skb, linkinfo);
706 nla_nest_cancel(skb, linkinfo);
711 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
713 struct sock *rtnl = net->rtnl;
716 NETLINK_CB(skb).dst_group = group;
718 refcount_inc(&skb->users);
719 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
721 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
725 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
727 struct sock *rtnl = net->rtnl;
729 return nlmsg_unicast(rtnl, skb, pid);
731 EXPORT_SYMBOL(rtnl_unicast);
733 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
734 struct nlmsghdr *nlh, gfp_t flags)
736 struct sock *rtnl = net->rtnl;
740 report = nlmsg_report(nlh);
742 nlmsg_notify(rtnl, skb, pid, group, report, flags);
744 EXPORT_SYMBOL(rtnl_notify);
746 void rtnl_set_sk_err(struct net *net, u32 group, int error)
748 struct sock *rtnl = net->rtnl;
750 netlink_set_err(rtnl, 0, group, error);
752 EXPORT_SYMBOL(rtnl_set_sk_err);
754 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
759 mx = nla_nest_start(skb, RTA_METRICS);
763 for (i = 0; i < RTAX_MAX; i++) {
765 if (i == RTAX_CC_ALGO - 1) {
766 char tmp[TCP_CA_NAME_MAX], *name;
768 name = tcp_ca_get_name_by_key(metrics[i], tmp);
771 if (nla_put_string(skb, i + 1, name))
772 goto nla_put_failure;
773 } else if (i == RTAX_FEATURES - 1) {
774 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
778 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
779 if (nla_put_u32(skb, i + 1, user_features))
780 goto nla_put_failure;
782 if (nla_put_u32(skb, i + 1, metrics[i]))
783 goto nla_put_failure;
790 nla_nest_cancel(skb, mx);
794 return nla_nest_end(skb, mx);
797 nla_nest_cancel(skb, mx);
800 EXPORT_SYMBOL(rtnetlink_put_metrics);
802 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
803 long expires, u32 error)
805 struct rta_cacheinfo ci = {
811 ci.rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse);
812 ci.rta_used = dst->__use;
813 ci.rta_clntref = atomic_read(&dst->__refcnt);
818 clock = jiffies_to_clock_t(abs(expires));
819 clock = min_t(unsigned long, clock, INT_MAX);
820 ci.rta_expires = (expires > 0) ? clock : -clock;
822 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
824 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
826 static void set_operstate(struct net_device *dev, unsigned char transition)
828 unsigned char operstate = dev->operstate;
830 switch (transition) {
832 if ((operstate == IF_OPER_DORMANT ||
833 operstate == IF_OPER_UNKNOWN) &&
835 operstate = IF_OPER_UP;
838 case IF_OPER_DORMANT:
839 if (operstate == IF_OPER_UP ||
840 operstate == IF_OPER_UNKNOWN)
841 operstate = IF_OPER_DORMANT;
845 if (dev->operstate != operstate) {
846 write_lock_bh(&dev_base_lock);
847 dev->operstate = operstate;
848 write_unlock_bh(&dev_base_lock);
849 netdev_state_change(dev);
853 static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
855 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
856 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
859 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
860 const struct ifinfomsg *ifm)
862 unsigned int flags = ifm->ifi_flags;
864 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
866 flags = (flags & ifm->ifi_change) |
867 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
872 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
873 const struct rtnl_link_stats64 *b)
875 a->rx_packets = b->rx_packets;
876 a->tx_packets = b->tx_packets;
877 a->rx_bytes = b->rx_bytes;
878 a->tx_bytes = b->tx_bytes;
879 a->rx_errors = b->rx_errors;
880 a->tx_errors = b->tx_errors;
881 a->rx_dropped = b->rx_dropped;
882 a->tx_dropped = b->tx_dropped;
884 a->multicast = b->multicast;
885 a->collisions = b->collisions;
887 a->rx_length_errors = b->rx_length_errors;
888 a->rx_over_errors = b->rx_over_errors;
889 a->rx_crc_errors = b->rx_crc_errors;
890 a->rx_frame_errors = b->rx_frame_errors;
891 a->rx_fifo_errors = b->rx_fifo_errors;
892 a->rx_missed_errors = b->rx_missed_errors;
894 a->tx_aborted_errors = b->tx_aborted_errors;
895 a->tx_carrier_errors = b->tx_carrier_errors;
896 a->tx_fifo_errors = b->tx_fifo_errors;
897 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
898 a->tx_window_errors = b->tx_window_errors;
900 a->rx_compressed = b->rx_compressed;
901 a->tx_compressed = b->tx_compressed;
903 a->rx_nohandler = b->rx_nohandler;
907 static inline int rtnl_vfinfo_size(const struct net_device *dev,
910 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) {
911 int num_vfs = dev_num_vf(dev->dev.parent);
912 size_t size = nla_total_size(0);
915 nla_total_size(sizeof(struct ifla_vf_mac)) +
916 nla_total_size(sizeof(struct ifla_vf_vlan)) +
917 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */
918 nla_total_size(MAX_VLAN_LIST_LEN *
919 sizeof(struct ifla_vf_vlan_info)) +
920 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
921 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
922 nla_total_size(sizeof(struct ifla_vf_rate)) +
923 nla_total_size(sizeof(struct ifla_vf_link_state)) +
924 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
925 nla_total_size(0) + /* nest IFLA_VF_STATS */
926 /* IFLA_VF_STATS_RX_PACKETS */
927 nla_total_size_64bit(sizeof(__u64)) +
928 /* IFLA_VF_STATS_TX_PACKETS */
929 nla_total_size_64bit(sizeof(__u64)) +
930 /* IFLA_VF_STATS_RX_BYTES */
931 nla_total_size_64bit(sizeof(__u64)) +
932 /* IFLA_VF_STATS_TX_BYTES */
933 nla_total_size_64bit(sizeof(__u64)) +
934 /* IFLA_VF_STATS_BROADCAST */
935 nla_total_size_64bit(sizeof(__u64)) +
936 /* IFLA_VF_STATS_MULTICAST */
937 nla_total_size_64bit(sizeof(__u64)) +
938 /* IFLA_VF_STATS_RX_DROPPED */
939 nla_total_size_64bit(sizeof(__u64)) +
940 /* IFLA_VF_STATS_TX_DROPPED */
941 nla_total_size_64bit(sizeof(__u64)) +
942 nla_total_size(sizeof(struct ifla_vf_trust)));
948 static size_t rtnl_port_size(const struct net_device *dev,
951 size_t port_size = nla_total_size(4) /* PORT_VF */
952 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
953 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
954 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
955 + nla_total_size(1) /* PROT_VDP_REQUEST */
956 + nla_total_size(2); /* PORT_VDP_RESPONSE */
957 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
958 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
960 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
963 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
964 !(ext_filter_mask & RTEXT_FILTER_VF))
966 if (dev_num_vf(dev->dev.parent))
967 return port_self_size + vf_ports_size +
968 vf_port_size * dev_num_vf(dev->dev.parent);
970 return port_self_size;
973 static size_t rtnl_xdp_size(void)
975 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */
976 nla_total_size(1) + /* XDP_ATTACHED */
977 nla_total_size(4) + /* XDP_PROG_ID (or 1st mode) */
978 nla_total_size(4); /* XDP_<mode>_PROG_ID */
983 static noinline size_t if_nlmsg_size(const struct net_device *dev,
986 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
987 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
988 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
989 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
990 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
991 + nla_total_size(sizeof(struct rtnl_link_stats))
992 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
993 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
994 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
995 + nla_total_size(4) /* IFLA_TXQLEN */
996 + nla_total_size(4) /* IFLA_WEIGHT */
997 + nla_total_size(4) /* IFLA_MTU */
998 + nla_total_size(4) /* IFLA_LINK */
999 + nla_total_size(4) /* IFLA_MASTER */
1000 + nla_total_size(1) /* IFLA_CARRIER */
1001 + nla_total_size(4) /* IFLA_PROMISCUITY */
1002 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
1003 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
1004 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
1005 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
1006 + nla_total_size(1) /* IFLA_OPERSTATE */
1007 + nla_total_size(1) /* IFLA_LINKMODE */
1008 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
1009 + nla_total_size(4) /* IFLA_LINK_NETNSID */
1010 + nla_total_size(4) /* IFLA_GROUP */
1011 + nla_total_size(ext_filter_mask
1012 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
1013 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
1014 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
1015 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
1016 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
1017 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
1018 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
1019 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
1020 + rtnl_xdp_size() /* IFLA_XDP */
1021 + nla_total_size(4) /* IFLA_EVENT */
1022 + nla_total_size(4) /* IFLA_NEW_NETNSID */
1023 + nla_total_size(4) /* IFLA_NEW_IFINDEX */
1024 + nla_total_size(1) /* IFLA_PROTO_DOWN */
1025 + nla_total_size(4) /* IFLA_TARGET_NETNSID */
1026 + nla_total_size(4) /* IFLA_CARRIER_UP_COUNT */
1027 + nla_total_size(4) /* IFLA_CARRIER_DOWN_COUNT */
1028 + nla_total_size(4) /* IFLA_MIN_MTU */
1029 + nla_total_size(4) /* IFLA_MAX_MTU */
1033 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
1035 struct nlattr *vf_ports;
1036 struct nlattr *vf_port;
1040 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
1044 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
1045 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
1047 goto nla_put_failure;
1048 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
1049 goto nla_put_failure;
1050 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
1051 if (err == -EMSGSIZE)
1052 goto nla_put_failure;
1054 nla_nest_cancel(skb, vf_port);
1057 nla_nest_end(skb, vf_port);
1060 nla_nest_end(skb, vf_ports);
1065 nla_nest_cancel(skb, vf_ports);
1069 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
1071 struct nlattr *port_self;
1074 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
1078 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
1080 nla_nest_cancel(skb, port_self);
1081 return (err == -EMSGSIZE) ? err : 0;
1084 nla_nest_end(skb, port_self);
1089 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1090 u32 ext_filter_mask)
1094 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1095 !(ext_filter_mask & RTEXT_FILTER_VF))
1098 err = rtnl_port_self_fill(skb, dev);
1102 if (dev_num_vf(dev->dev.parent)) {
1103 err = rtnl_vf_ports_fill(skb, dev);
1111 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1114 struct netdev_phys_item_id ppid;
1116 err = dev_get_phys_port_id(dev, &ppid);
1118 if (err == -EOPNOTSUPP)
1123 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1129 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1131 char name[IFNAMSIZ];
1134 err = dev_get_phys_port_name(dev, name, sizeof(name));
1136 if (err == -EOPNOTSUPP)
1141 if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
1147 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1150 struct switchdev_attr attr = {
1152 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
1153 .flags = SWITCHDEV_F_NO_RECURSE,
1156 err = switchdev_port_attr_get(dev, &attr);
1158 if (err == -EOPNOTSUPP)
1163 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1170 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1171 struct net_device *dev)
1173 struct rtnl_link_stats64 *sp;
1174 struct nlattr *attr;
1176 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1177 sizeof(struct rtnl_link_stats64), IFLA_PAD);
1181 sp = nla_data(attr);
1182 dev_get_stats(dev, sp);
1184 attr = nla_reserve(skb, IFLA_STATS,
1185 sizeof(struct rtnl_link_stats));
1189 copy_rtnl_link_stats(nla_data(attr), sp);
1194 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1195 struct net_device *dev,
1197 struct nlattr *vfinfo)
1199 struct ifla_vf_rss_query_en vf_rss_query_en;
1200 struct nlattr *vf, *vfstats, *vfvlanlist;
1201 struct ifla_vf_link_state vf_linkstate;
1202 struct ifla_vf_vlan_info vf_vlan_info;
1203 struct ifla_vf_spoofchk vf_spoofchk;
1204 struct ifla_vf_tx_rate vf_tx_rate;
1205 struct ifla_vf_stats vf_stats;
1206 struct ifla_vf_trust vf_trust;
1207 struct ifla_vf_vlan vf_vlan;
1208 struct ifla_vf_rate vf_rate;
1209 struct ifla_vf_mac vf_mac;
1210 struct ifla_vf_info ivi;
1212 memset(&ivi, 0, sizeof(ivi));
1214 /* Not all SR-IOV capable drivers support the
1215 * spoofcheck and "RSS query enable" query. Preset to
1216 * -1 so the user space tool can detect that the driver
1217 * didn't report anything.
1220 ivi.rss_query_en = -1;
1222 /* The default value for VF link state is "auto"
1223 * IFLA_VF_LINK_STATE_AUTO which equals zero
1226 /* VLAN Protocol by default is 802.1Q */
1227 ivi.vlan_proto = htons(ETH_P_8021Q);
1228 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1231 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
1240 vf_rss_query_en.vf =
1241 vf_trust.vf = ivi.vf;
1243 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1244 vf_vlan.vlan = ivi.vlan;
1245 vf_vlan.qos = ivi.qos;
1246 vf_vlan_info.vlan = ivi.vlan;
1247 vf_vlan_info.qos = ivi.qos;
1248 vf_vlan_info.vlan_proto = ivi.vlan_proto;
1249 vf_tx_rate.rate = ivi.max_tx_rate;
1250 vf_rate.min_tx_rate = ivi.min_tx_rate;
1251 vf_rate.max_tx_rate = ivi.max_tx_rate;
1252 vf_spoofchk.setting = ivi.spoofchk;
1253 vf_linkstate.link_state = ivi.linkstate;
1254 vf_rss_query_en.setting = ivi.rss_query_en;
1255 vf_trust.setting = ivi.trusted;
1256 vf = nla_nest_start(skb, IFLA_VF_INFO);
1258 goto nla_put_vfinfo_failure;
1259 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1260 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1261 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1263 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1265 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1267 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1269 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1270 sizeof(vf_rss_query_en),
1271 &vf_rss_query_en) ||
1272 nla_put(skb, IFLA_VF_TRUST,
1273 sizeof(vf_trust), &vf_trust))
1274 goto nla_put_vf_failure;
1275 vfvlanlist = nla_nest_start(skb, IFLA_VF_VLAN_LIST);
1277 goto nla_put_vf_failure;
1278 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1280 nla_nest_cancel(skb, vfvlanlist);
1281 goto nla_put_vf_failure;
1283 nla_nest_end(skb, vfvlanlist);
1284 memset(&vf_stats, 0, sizeof(vf_stats));
1285 if (dev->netdev_ops->ndo_get_vf_stats)
1286 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1288 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1290 goto nla_put_vf_failure;
1291 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1292 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1293 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1294 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1295 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1296 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1297 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1298 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1299 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1300 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1301 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
1302 vf_stats.multicast, IFLA_VF_STATS_PAD) ||
1303 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_DROPPED,
1304 vf_stats.rx_dropped, IFLA_VF_STATS_PAD) ||
1305 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_DROPPED,
1306 vf_stats.tx_dropped, IFLA_VF_STATS_PAD)) {
1307 nla_nest_cancel(skb, vfstats);
1308 goto nla_put_vf_failure;
1310 nla_nest_end(skb, vfstats);
1311 nla_nest_end(skb, vf);
1315 nla_nest_cancel(skb, vf);
1316 nla_put_vfinfo_failure:
1317 nla_nest_cancel(skb, vfinfo);
1321 static noinline_for_stack int rtnl_fill_vf(struct sk_buff *skb,
1322 struct net_device *dev,
1323 u32 ext_filter_mask)
1325 struct nlattr *vfinfo;
1328 if (!dev->dev.parent || ((ext_filter_mask & RTEXT_FILTER_VF) == 0))
1331 num_vfs = dev_num_vf(dev->dev.parent);
1332 if (nla_put_u32(skb, IFLA_NUM_VF, num_vfs))
1335 if (!dev->netdev_ops->ndo_get_vf_config)
1338 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1342 for (i = 0; i < num_vfs; i++) {
1343 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1347 nla_nest_end(skb, vfinfo);
1351 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1353 struct rtnl_link_ifmap map;
1355 memset(&map, 0, sizeof(map));
1356 map.mem_start = dev->mem_start;
1357 map.mem_end = dev->mem_end;
1358 map.base_addr = dev->base_addr;
1361 map.port = dev->if_port;
1363 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
1369 static u32 rtnl_xdp_prog_skb(struct net_device *dev)
1371 const struct bpf_prog *generic_xdp_prog;
1375 generic_xdp_prog = rtnl_dereference(dev->xdp_prog);
1376 if (!generic_xdp_prog)
1378 return generic_xdp_prog->aux->id;
1381 static u32 rtnl_xdp_prog_drv(struct net_device *dev)
1383 return __dev_xdp_query(dev, dev->netdev_ops->ndo_bpf, XDP_QUERY_PROG);
1386 static u32 rtnl_xdp_prog_hw(struct net_device *dev)
1388 return __dev_xdp_query(dev, dev->netdev_ops->ndo_bpf,
1392 static int rtnl_xdp_report_one(struct sk_buff *skb, struct net_device *dev,
1393 u32 *prog_id, u8 *mode, u8 tgt_mode, u32 attr,
1394 u32 (*get_prog_id)(struct net_device *dev))
1399 curr_id = get_prog_id(dev);
1404 err = nla_put_u32(skb, attr, curr_id);
1408 if (*mode != XDP_ATTACHED_NONE)
1409 *mode = XDP_ATTACHED_MULTI;
1416 static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1423 xdp = nla_nest_start(skb, IFLA_XDP);
1428 mode = XDP_ATTACHED_NONE;
1429 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_SKB,
1430 IFLA_XDP_SKB_PROG_ID, rtnl_xdp_prog_skb);
1433 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_DRV,
1434 IFLA_XDP_DRV_PROG_ID, rtnl_xdp_prog_drv);
1437 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_HW,
1438 IFLA_XDP_HW_PROG_ID, rtnl_xdp_prog_hw);
1442 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, mode);
1446 if (prog_id && mode != XDP_ATTACHED_MULTI) {
1447 err = nla_put_u32(skb, IFLA_XDP_PROG_ID, prog_id);
1452 nla_nest_end(skb, xdp);
1456 nla_nest_cancel(skb, xdp);
1460 static u32 rtnl_get_event(unsigned long event)
1462 u32 rtnl_event_type = IFLA_EVENT_NONE;
1466 rtnl_event_type = IFLA_EVENT_REBOOT;
1468 case NETDEV_FEAT_CHANGE:
1469 rtnl_event_type = IFLA_EVENT_FEATURES;
1471 case NETDEV_BONDING_FAILOVER:
1472 rtnl_event_type = IFLA_EVENT_BONDING_FAILOVER;
1474 case NETDEV_NOTIFY_PEERS:
1475 rtnl_event_type = IFLA_EVENT_NOTIFY_PEERS;
1477 case NETDEV_RESEND_IGMP:
1478 rtnl_event_type = IFLA_EVENT_IGMP_RESEND;
1480 case NETDEV_CHANGEINFODATA:
1481 rtnl_event_type = IFLA_EVENT_BONDING_OPTIONS;
1487 return rtnl_event_type;
1490 static int put_master_ifindex(struct sk_buff *skb, struct net_device *dev)
1492 const struct net_device *upper_dev;
1497 upper_dev = netdev_master_upper_dev_get_rcu(dev);
1499 ret = nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex);
1505 static int nla_put_iflink(struct sk_buff *skb, const struct net_device *dev)
1507 int ifindex = dev_get_iflink(dev);
1509 if (dev->ifindex == ifindex)
1512 return nla_put_u32(skb, IFLA_LINK, ifindex);
1515 static noinline_for_stack int nla_put_ifalias(struct sk_buff *skb,
1516 struct net_device *dev)
1521 ret = dev_get_alias(dev, buf, sizeof(buf));
1522 return ret > 0 ? nla_put_string(skb, IFLA_IFALIAS, buf) : 0;
1525 static int rtnl_fill_link_netnsid(struct sk_buff *skb,
1526 const struct net_device *dev,
1527 struct net *src_net)
1529 if (dev->rtnl_link_ops && dev->rtnl_link_ops->get_link_net) {
1530 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1532 if (!net_eq(dev_net(dev), link_net)) {
1533 int id = peernet2id_alloc(src_net, link_net);
1535 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1543 static int rtnl_fill_link_af(struct sk_buff *skb,
1544 const struct net_device *dev,
1545 u32 ext_filter_mask)
1547 const struct rtnl_af_ops *af_ops;
1548 struct nlattr *af_spec;
1550 af_spec = nla_nest_start(skb, IFLA_AF_SPEC);
1554 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
1558 if (!af_ops->fill_link_af)
1561 af = nla_nest_start(skb, af_ops->family);
1565 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1567 * Caller may return ENODATA to indicate that there
1568 * was no data to be dumped. This is not an error, it
1569 * means we should trim the attribute header and
1572 if (err == -ENODATA)
1573 nla_nest_cancel(skb, af);
1577 nla_nest_end(skb, af);
1580 nla_nest_end(skb, af_spec);
1584 static int rtnl_fill_ifinfo(struct sk_buff *skb,
1585 struct net_device *dev, struct net *src_net,
1586 int type, u32 pid, u32 seq, u32 change,
1587 unsigned int flags, u32 ext_filter_mask,
1588 u32 event, int *new_nsid, int new_ifindex,
1591 struct ifinfomsg *ifm;
1592 struct nlmsghdr *nlh;
1595 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1599 ifm = nlmsg_data(nlh);
1600 ifm->ifi_family = AF_UNSPEC;
1602 ifm->ifi_type = dev->type;
1603 ifm->ifi_index = dev->ifindex;
1604 ifm->ifi_flags = dev_get_flags(dev);
1605 ifm->ifi_change = change;
1607 if (tgt_netnsid >= 0 && nla_put_s32(skb, IFLA_TARGET_NETNSID, tgt_netnsid))
1608 goto nla_put_failure;
1610 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1611 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1612 nla_put_u8(skb, IFLA_OPERSTATE,
1613 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1614 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1615 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1616 nla_put_u32(skb, IFLA_MIN_MTU, dev->min_mtu) ||
1617 nla_put_u32(skb, IFLA_MAX_MTU, dev->max_mtu) ||
1618 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1619 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
1620 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1621 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1622 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1624 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1626 nla_put_iflink(skb, dev) ||
1627 put_master_ifindex(skb, dev) ||
1628 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1630 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1631 nla_put_ifalias(skb, dev) ||
1632 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1633 atomic_read(&dev->carrier_up_count) +
1634 atomic_read(&dev->carrier_down_count)) ||
1635 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down) ||
1636 nla_put_u32(skb, IFLA_CARRIER_UP_COUNT,
1637 atomic_read(&dev->carrier_up_count)) ||
1638 nla_put_u32(skb, IFLA_CARRIER_DOWN_COUNT,
1639 atomic_read(&dev->carrier_down_count)))
1640 goto nla_put_failure;
1642 if (event != IFLA_EVENT_NONE) {
1643 if (nla_put_u32(skb, IFLA_EVENT, event))
1644 goto nla_put_failure;
1647 if (rtnl_fill_link_ifmap(skb, dev))
1648 goto nla_put_failure;
1650 if (dev->addr_len) {
1651 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1652 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1653 goto nla_put_failure;
1656 if (rtnl_phys_port_id_fill(skb, dev))
1657 goto nla_put_failure;
1659 if (rtnl_phys_port_name_fill(skb, dev))
1660 goto nla_put_failure;
1662 if (rtnl_phys_switch_id_fill(skb, dev))
1663 goto nla_put_failure;
1665 if (rtnl_fill_stats(skb, dev))
1666 goto nla_put_failure;
1668 if (rtnl_fill_vf(skb, dev, ext_filter_mask))
1669 goto nla_put_failure;
1671 if (rtnl_port_fill(skb, dev, ext_filter_mask))
1672 goto nla_put_failure;
1674 if (rtnl_xdp_fill(skb, dev))
1675 goto nla_put_failure;
1677 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1678 if (rtnl_link_fill(skb, dev) < 0)
1679 goto nla_put_failure;
1682 if (rtnl_fill_link_netnsid(skb, dev, src_net))
1683 goto nla_put_failure;
1686 nla_put_s32(skb, IFLA_NEW_NETNSID, *new_nsid) < 0)
1687 goto nla_put_failure;
1689 nla_put_s32(skb, IFLA_NEW_IFINDEX, new_ifindex) < 0)
1690 goto nla_put_failure;
1694 if (rtnl_fill_link_af(skb, dev, ext_filter_mask))
1695 goto nla_put_failure_rcu;
1698 nlmsg_end(skb, nlh);
1701 nla_put_failure_rcu:
1704 nlmsg_cancel(skb, nlh);
1708 static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1709 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1710 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1711 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1712 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1713 [IFLA_MTU] = { .type = NLA_U32 },
1714 [IFLA_LINK] = { .type = NLA_U32 },
1715 [IFLA_MASTER] = { .type = NLA_U32 },
1716 [IFLA_CARRIER] = { .type = NLA_U8 },
1717 [IFLA_TXQLEN] = { .type = NLA_U32 },
1718 [IFLA_WEIGHT] = { .type = NLA_U32 },
1719 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1720 [IFLA_LINKMODE] = { .type = NLA_U8 },
1721 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1722 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1723 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1724 /* IFLA_IFALIAS is a string, but policy is set to NLA_BINARY to
1725 * allow 0-length string (needed to remove an alias).
1727 [IFLA_IFALIAS] = { .type = NLA_BINARY, .len = IFALIASZ - 1 },
1728 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1729 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1730 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1731 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1732 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1733 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1734 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1735 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1736 [IFLA_GSO_MAX_SEGS] = { .type = NLA_U32 },
1737 [IFLA_GSO_MAX_SIZE] = { .type = NLA_U32 },
1738 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1739 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
1740 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1741 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
1742 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
1743 [IFLA_XDP] = { .type = NLA_NESTED },
1744 [IFLA_EVENT] = { .type = NLA_U32 },
1745 [IFLA_GROUP] = { .type = NLA_U32 },
1746 [IFLA_TARGET_NETNSID] = { .type = NLA_S32 },
1747 [IFLA_CARRIER_UP_COUNT] = { .type = NLA_U32 },
1748 [IFLA_CARRIER_DOWN_COUNT] = { .type = NLA_U32 },
1749 [IFLA_MIN_MTU] = { .type = NLA_U32 },
1750 [IFLA_MAX_MTU] = { .type = NLA_U32 },
1753 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1754 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1755 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1756 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1757 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
1760 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1761 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1762 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1763 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
1764 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1765 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1766 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1767 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
1768 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
1769 [IFLA_VF_STATS] = { .type = NLA_NESTED },
1770 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
1771 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1772 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1775 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1776 [IFLA_PORT_VF] = { .type = NLA_U32 },
1777 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1778 .len = PORT_PROFILE_MAX },
1779 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1780 .len = PORT_UUID_MAX },
1781 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1782 .len = PORT_UUID_MAX },
1783 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1784 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1786 /* Unused, but we need to keep it here since user space could
1787 * fill it. It's also broken with regard to NLA_BINARY use in
1788 * combination with structs.
1790 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1791 .len = sizeof(struct ifla_port_vsi) },
1794 static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
1795 [IFLA_XDP_FD] = { .type = NLA_S32 },
1796 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
1797 [IFLA_XDP_FLAGS] = { .type = NLA_U32 },
1798 [IFLA_XDP_PROG_ID] = { .type = NLA_U32 },
1801 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1803 const struct rtnl_link_ops *ops = NULL;
1804 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1806 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla,
1807 ifla_info_policy, NULL) < 0)
1810 if (linfo[IFLA_INFO_KIND]) {
1811 char kind[MODULE_NAME_LEN];
1813 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1814 ops = rtnl_link_ops_get(kind);
1820 static bool link_master_filtered(struct net_device *dev, int master_idx)
1822 struct net_device *master;
1827 master = netdev_master_upper_dev_get(dev);
1828 if (!master || master->ifindex != master_idx)
1834 static bool link_kind_filtered(const struct net_device *dev,
1835 const struct rtnl_link_ops *kind_ops)
1837 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1843 static bool link_dump_filtered(struct net_device *dev,
1845 const struct rtnl_link_ops *kind_ops)
1847 if (link_master_filtered(dev, master_idx) ||
1848 link_kind_filtered(dev, kind_ops))
1855 * rtnl_get_net_ns_capable - Get netns if sufficiently privileged.
1856 * @sk: netlink socket
1857 * @netnsid: network namespace identifier
1859 * Returns the network namespace identified by netnsid on success or an error
1860 * pointer on failure.
1862 struct net *rtnl_get_net_ns_capable(struct sock *sk, int netnsid)
1866 net = get_net_ns_by_id(sock_net(sk), netnsid);
1868 return ERR_PTR(-EINVAL);
1870 /* For now, the caller is required to have CAP_NET_ADMIN in
1871 * the user namespace owning the target net ns.
1873 if (!sk_ns_capable(sk, net->user_ns, CAP_NET_ADMIN)) {
1875 return ERR_PTR(-EACCES);
1879 EXPORT_SYMBOL_GPL(rtnl_get_net_ns_capable);
1881 static int rtnl_valid_dump_ifinfo_req(const struct nlmsghdr *nlh,
1882 bool strict_check, struct nlattr **tb,
1883 struct netlink_ext_ack *extack)
1888 struct ifinfomsg *ifm;
1890 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
1891 NL_SET_ERR_MSG(extack, "Invalid header for link dump");
1895 ifm = nlmsg_data(nlh);
1896 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
1898 NL_SET_ERR_MSG(extack, "Invalid values in header for link dump request");
1901 if (ifm->ifi_index) {
1902 NL_SET_ERR_MSG(extack, "Filter by device index not supported for link dumps");
1906 return nlmsg_parse_strict(nlh, sizeof(*ifm), tb, IFLA_MAX,
1907 ifla_policy, extack);
1910 /* A hack to preserve kernel<->userspace interface.
1911 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1912 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1913 * what iproute2 < v3.9.0 used.
1914 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1915 * attribute, its netlink message is shorter than struct ifinfomsg.
1917 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
1918 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1920 return nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, extack);
1923 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1925 struct netlink_ext_ack *extack = cb->extack;
1926 const struct nlmsghdr *nlh = cb->nlh;
1927 struct net *net = sock_net(skb->sk);
1928 struct net *tgt_net = net;
1931 struct net_device *dev;
1932 struct hlist_head *head;
1933 struct nlattr *tb[IFLA_MAX+1];
1934 u32 ext_filter_mask = 0;
1935 const struct rtnl_link_ops *kind_ops = NULL;
1936 unsigned int flags = NLM_F_MULTI;
1942 s_idx = cb->args[1];
1944 err = rtnl_valid_dump_ifinfo_req(nlh, cb->strict_check, tb, extack);
1946 if (cb->strict_check)
1952 for (i = 0; i <= IFLA_MAX; ++i) {
1956 /* new attributes should only be added with strict checking */
1958 case IFLA_TARGET_NETNSID:
1959 netnsid = nla_get_s32(tb[i]);
1960 tgt_net = rtnl_get_net_ns_capable(skb->sk, netnsid);
1961 if (IS_ERR(tgt_net)) {
1962 NL_SET_ERR_MSG(extack, "Invalid target network namespace id");
1963 return PTR_ERR(tgt_net);
1967 ext_filter_mask = nla_get_u32(tb[i]);
1970 master_idx = nla_get_u32(tb[i]);
1973 kind_ops = linkinfo_to_kind_ops(tb[i]);
1976 if (cb->strict_check) {
1977 NL_SET_ERR_MSG(extack, "Unsupported attribute in link dump request");
1983 if (master_idx || kind_ops)
1984 flags |= NLM_F_DUMP_FILTERED;
1987 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1989 head = &tgt_net->dev_index_head[h];
1990 hlist_for_each_entry(dev, head, index_hlist) {
1991 if (link_dump_filtered(dev, master_idx, kind_ops))
1995 err = rtnl_fill_ifinfo(skb, dev, net,
1997 NETLINK_CB(cb->skb).portid,
1998 nlh->nlmsg_seq, 0, flags,
1999 ext_filter_mask, 0, NULL, 0,
2003 if (likely(skb->len))
2017 cb->seq = net->dev_base_seq;
2018 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
2025 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
2026 struct netlink_ext_ack *exterr)
2028 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy, exterr);
2030 EXPORT_SYMBOL(rtnl_nla_parse_ifla);
2032 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
2035 /* Examine the link attributes and figure out which
2036 * network namespace we are talking about.
2038 if (tb[IFLA_NET_NS_PID])
2039 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
2040 else if (tb[IFLA_NET_NS_FD])
2041 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
2043 net = get_net(src_net);
2046 EXPORT_SYMBOL(rtnl_link_get_net);
2048 /* Figure out which network namespace we are talking about by
2049 * examining the link attributes in the following order:
2051 * 1. IFLA_NET_NS_PID
2053 * 3. IFLA_TARGET_NETNSID
2055 static struct net *rtnl_link_get_net_by_nlattr(struct net *src_net,
2056 struct nlattr *tb[])
2060 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD])
2061 return rtnl_link_get_net(src_net, tb);
2063 if (!tb[IFLA_TARGET_NETNSID])
2064 return get_net(src_net);
2066 net = get_net_ns_by_id(src_net, nla_get_u32(tb[IFLA_TARGET_NETNSID]));
2068 return ERR_PTR(-EINVAL);
2073 static struct net *rtnl_link_get_net_capable(const struct sk_buff *skb,
2074 struct net *src_net,
2075 struct nlattr *tb[], int cap)
2079 net = rtnl_link_get_net_by_nlattr(src_net, tb);
2083 if (!netlink_ns_capable(skb, net->user_ns, cap)) {
2085 return ERR_PTR(-EPERM);
2091 /* Verify that rtnetlink requests do not pass additional properties
2092 * potentially referring to different network namespaces.
2094 static int rtnl_ensure_unique_netns(struct nlattr *tb[],
2095 struct netlink_ext_ack *extack,
2099 if (netns_id_only) {
2100 if (!tb[IFLA_NET_NS_PID] && !tb[IFLA_NET_NS_FD])
2103 NL_SET_ERR_MSG(extack, "specified netns attribute not supported");
2107 if (tb[IFLA_TARGET_NETNSID] && (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]))
2110 if (tb[IFLA_NET_NS_PID] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_FD]))
2113 if (tb[IFLA_NET_NS_FD] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_PID]))
2119 NL_SET_ERR_MSG(extack, "multiple netns identifying attributes specified");
2123 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
2126 if (tb[IFLA_ADDRESS] &&
2127 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
2130 if (tb[IFLA_BROADCAST] &&
2131 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
2135 if (tb[IFLA_AF_SPEC]) {
2139 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2140 const struct rtnl_af_ops *af_ops;
2143 af_ops = rtnl_af_lookup(nla_type(af));
2146 return -EAFNOSUPPORT;
2149 if (!af_ops->set_link_af) {
2154 if (af_ops->validate_link_af) {
2155 err = af_ops->validate_link_af(dev, af);
2169 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
2172 const struct net_device_ops *ops = dev->netdev_ops;
2174 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
2177 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
2179 if (dev->type != ARPHRD_INFINIBAND)
2182 return handle_infiniband_guid(dev, ivt, guid_type);
2185 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
2187 const struct net_device_ops *ops = dev->netdev_ops;
2190 if (tb[IFLA_VF_MAC]) {
2191 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
2194 if (ops->ndo_set_vf_mac)
2195 err = ops->ndo_set_vf_mac(dev, ivm->vf,
2201 if (tb[IFLA_VF_VLAN]) {
2202 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
2205 if (ops->ndo_set_vf_vlan)
2206 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
2208 htons(ETH_P_8021Q));
2213 if (tb[IFLA_VF_VLAN_LIST]) {
2214 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
2215 struct nlattr *attr;
2219 if (!ops->ndo_set_vf_vlan)
2222 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
2223 if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
2224 nla_len(attr) < NLA_HDRLEN) {
2227 if (len >= MAX_VLAN_LIST_LEN)
2229 ivvl[len] = nla_data(attr);
2236 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
2237 ivvl[0]->qos, ivvl[0]->vlan_proto);
2242 if (tb[IFLA_VF_TX_RATE]) {
2243 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
2244 struct ifla_vf_info ivf;
2247 if (ops->ndo_get_vf_config)
2248 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
2253 if (ops->ndo_set_vf_rate)
2254 err = ops->ndo_set_vf_rate(dev, ivt->vf,
2261 if (tb[IFLA_VF_RATE]) {
2262 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
2265 if (ops->ndo_set_vf_rate)
2266 err = ops->ndo_set_vf_rate(dev, ivt->vf,
2273 if (tb[IFLA_VF_SPOOFCHK]) {
2274 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
2277 if (ops->ndo_set_vf_spoofchk)
2278 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
2284 if (tb[IFLA_VF_LINK_STATE]) {
2285 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
2288 if (ops->ndo_set_vf_link_state)
2289 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
2295 if (tb[IFLA_VF_RSS_QUERY_EN]) {
2296 struct ifla_vf_rss_query_en *ivrssq_en;
2299 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
2300 if (ops->ndo_set_vf_rss_query_en)
2301 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
2302 ivrssq_en->setting);
2307 if (tb[IFLA_VF_TRUST]) {
2308 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
2311 if (ops->ndo_set_vf_trust)
2312 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
2317 if (tb[IFLA_VF_IB_NODE_GUID]) {
2318 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
2320 if (!ops->ndo_set_vf_guid)
2323 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
2326 if (tb[IFLA_VF_IB_PORT_GUID]) {
2327 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
2329 if (!ops->ndo_set_vf_guid)
2332 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
2338 static int do_set_master(struct net_device *dev, int ifindex,
2339 struct netlink_ext_ack *extack)
2341 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
2342 const struct net_device_ops *ops;
2346 if (upper_dev->ifindex == ifindex)
2348 ops = upper_dev->netdev_ops;
2349 if (ops->ndo_del_slave) {
2350 err = ops->ndo_del_slave(upper_dev, dev);
2359 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
2362 ops = upper_dev->netdev_ops;
2363 if (ops->ndo_add_slave) {
2364 err = ops->ndo_add_slave(upper_dev, dev, extack);
2374 #define DO_SETLINK_MODIFIED 0x01
2375 /* notify flag means notify + modified. */
2376 #define DO_SETLINK_NOTIFY 0x03
2377 static int do_setlink(const struct sk_buff *skb,
2378 struct net_device *dev, struct ifinfomsg *ifm,
2379 struct netlink_ext_ack *extack,
2380 struct nlattr **tb, char *ifname, int status)
2382 const struct net_device_ops *ops = dev->netdev_ops;
2385 err = validate_linkmsg(dev, tb);
2389 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD] || tb[IFLA_TARGET_NETNSID]) {
2390 struct net *net = rtnl_link_get_net_capable(skb, dev_net(dev),
2397 err = dev_change_net_namespace(dev, net, ifname);
2401 status |= DO_SETLINK_MODIFIED;
2405 struct rtnl_link_ifmap *u_map;
2408 if (!ops->ndo_set_config) {
2413 if (!netif_device_present(dev)) {
2418 u_map = nla_data(tb[IFLA_MAP]);
2419 k_map.mem_start = (unsigned long) u_map->mem_start;
2420 k_map.mem_end = (unsigned long) u_map->mem_end;
2421 k_map.base_addr = (unsigned short) u_map->base_addr;
2422 k_map.irq = (unsigned char) u_map->irq;
2423 k_map.dma = (unsigned char) u_map->dma;
2424 k_map.port = (unsigned char) u_map->port;
2426 err = ops->ndo_set_config(dev, &k_map);
2430 status |= DO_SETLINK_NOTIFY;
2433 if (tb[IFLA_ADDRESS]) {
2434 struct sockaddr *sa;
2437 len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len,
2439 sa = kmalloc(len, GFP_KERNEL);
2444 sa->sa_family = dev->type;
2445 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
2447 err = dev_set_mac_address(dev, sa, extack);
2451 status |= DO_SETLINK_MODIFIED;
2455 err = dev_set_mtu_ext(dev, nla_get_u32(tb[IFLA_MTU]), extack);
2458 status |= DO_SETLINK_MODIFIED;
2461 if (tb[IFLA_GROUP]) {
2462 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2463 status |= DO_SETLINK_NOTIFY;
2467 * Interface selected by interface index but interface
2468 * name provided implies that a name change has been
2471 if (ifm->ifi_index > 0 && ifname[0]) {
2472 err = dev_change_name(dev, ifname);
2475 status |= DO_SETLINK_MODIFIED;
2478 if (tb[IFLA_IFALIAS]) {
2479 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2480 nla_len(tb[IFLA_IFALIAS]));
2483 status |= DO_SETLINK_NOTIFY;
2486 if (tb[IFLA_BROADCAST]) {
2487 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
2488 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
2491 if (ifm->ifi_flags || ifm->ifi_change) {
2492 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
2498 if (tb[IFLA_MASTER]) {
2499 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
2502 status |= DO_SETLINK_MODIFIED;
2505 if (tb[IFLA_CARRIER]) {
2506 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2509 status |= DO_SETLINK_MODIFIED;
2512 if (tb[IFLA_TXQLEN]) {
2513 unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]);
2515 err = dev_change_tx_queue_len(dev, value);
2518 status |= DO_SETLINK_MODIFIED;
2521 if (tb[IFLA_GSO_MAX_SIZE]) {
2522 u32 max_size = nla_get_u32(tb[IFLA_GSO_MAX_SIZE]);
2524 if (max_size > GSO_MAX_SIZE) {
2529 if (dev->gso_max_size ^ max_size) {
2530 netif_set_gso_max_size(dev, max_size);
2531 status |= DO_SETLINK_MODIFIED;
2535 if (tb[IFLA_GSO_MAX_SEGS]) {
2536 u32 max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
2538 if (max_segs > GSO_MAX_SEGS) {
2543 if (dev->gso_max_segs ^ max_segs) {
2544 dev->gso_max_segs = max_segs;
2545 status |= DO_SETLINK_MODIFIED;
2549 if (tb[IFLA_OPERSTATE])
2550 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2552 if (tb[IFLA_LINKMODE]) {
2553 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2555 write_lock_bh(&dev_base_lock);
2556 if (dev->link_mode ^ value)
2557 status |= DO_SETLINK_NOTIFY;
2558 dev->link_mode = value;
2559 write_unlock_bh(&dev_base_lock);
2562 if (tb[IFLA_VFINFO_LIST]) {
2563 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
2564 struct nlattr *attr;
2567 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
2568 if (nla_type(attr) != IFLA_VF_INFO ||
2569 nla_len(attr) < NLA_HDRLEN) {
2573 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
2574 ifla_vf_policy, NULL);
2577 err = do_setvfinfo(dev, vfinfo);
2580 status |= DO_SETLINK_NOTIFY;
2585 if (tb[IFLA_VF_PORTS]) {
2586 struct nlattr *port[IFLA_PORT_MAX+1];
2587 struct nlattr *attr;
2592 if (!ops->ndo_set_vf_port)
2595 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
2596 if (nla_type(attr) != IFLA_VF_PORT ||
2597 nla_len(attr) < NLA_HDRLEN) {
2601 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
2602 ifla_port_policy, NULL);
2605 if (!port[IFLA_PORT_VF]) {
2609 vf = nla_get_u32(port[IFLA_PORT_VF]);
2610 err = ops->ndo_set_vf_port(dev, vf, port);
2613 status |= DO_SETLINK_NOTIFY;
2618 if (tb[IFLA_PORT_SELF]) {
2619 struct nlattr *port[IFLA_PORT_MAX+1];
2621 err = nla_parse_nested(port, IFLA_PORT_MAX,
2622 tb[IFLA_PORT_SELF], ifla_port_policy,
2628 if (ops->ndo_set_vf_port)
2629 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2632 status |= DO_SETLINK_NOTIFY;
2635 if (tb[IFLA_AF_SPEC]) {
2639 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2640 const struct rtnl_af_ops *af_ops;
2644 BUG_ON(!(af_ops = rtnl_af_lookup(nla_type(af))));
2646 err = af_ops->set_link_af(dev, af);
2653 status |= DO_SETLINK_NOTIFY;
2658 if (tb[IFLA_PROTO_DOWN]) {
2659 err = dev_change_proto_down(dev,
2660 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2663 status |= DO_SETLINK_NOTIFY;
2667 struct nlattr *xdp[IFLA_XDP_MAX + 1];
2670 err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP],
2671 ifla_xdp_policy, NULL);
2675 if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) {
2680 if (xdp[IFLA_XDP_FLAGS]) {
2681 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
2682 if (xdp_flags & ~XDP_FLAGS_MASK) {
2686 if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) {
2692 if (xdp[IFLA_XDP_FD]) {
2693 err = dev_change_xdp_fd(dev, extack,
2694 nla_get_s32(xdp[IFLA_XDP_FD]),
2698 status |= DO_SETLINK_NOTIFY;
2703 if (status & DO_SETLINK_MODIFIED) {
2704 if ((status & DO_SETLINK_NOTIFY) == DO_SETLINK_NOTIFY)
2705 netdev_state_change(dev);
2708 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",
2715 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2716 struct netlink_ext_ack *extack)
2718 struct net *net = sock_net(skb->sk);
2719 struct ifinfomsg *ifm;
2720 struct net_device *dev;
2722 struct nlattr *tb[IFLA_MAX+1];
2723 char ifname[IFNAMSIZ];
2725 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy,
2730 err = rtnl_ensure_unique_netns(tb, extack, false);
2734 if (tb[IFLA_IFNAME])
2735 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2740 ifm = nlmsg_data(nlh);
2741 if (ifm->ifi_index > 0)
2742 dev = __dev_get_by_index(net, ifm->ifi_index);
2743 else if (tb[IFLA_IFNAME])
2744 dev = __dev_get_by_name(net, ifname);
2753 err = do_setlink(skb, dev, ifm, extack, tb, ifname, 0);
2758 static int rtnl_group_dellink(const struct net *net, int group)
2760 struct net_device *dev, *aux;
2761 LIST_HEAD(list_kill);
2767 for_each_netdev(net, dev) {
2768 if (dev->group == group) {
2769 const struct rtnl_link_ops *ops;
2772 ops = dev->rtnl_link_ops;
2773 if (!ops || !ops->dellink)
2781 for_each_netdev_safe(net, dev, aux) {
2782 if (dev->group == group) {
2783 const struct rtnl_link_ops *ops;
2785 ops = dev->rtnl_link_ops;
2786 ops->dellink(dev, &list_kill);
2789 unregister_netdevice_many(&list_kill);
2794 int rtnl_delete_link(struct net_device *dev)
2796 const struct rtnl_link_ops *ops;
2797 LIST_HEAD(list_kill);
2799 ops = dev->rtnl_link_ops;
2800 if (!ops || !ops->dellink)
2803 ops->dellink(dev, &list_kill);
2804 unregister_netdevice_many(&list_kill);
2808 EXPORT_SYMBOL_GPL(rtnl_delete_link);
2810 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
2811 struct netlink_ext_ack *extack)
2813 struct net *net = sock_net(skb->sk);
2814 struct net *tgt_net = net;
2815 struct net_device *dev = NULL;
2816 struct ifinfomsg *ifm;
2817 char ifname[IFNAMSIZ];
2818 struct nlattr *tb[IFLA_MAX+1];
2822 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
2826 err = rtnl_ensure_unique_netns(tb, extack, true);
2830 if (tb[IFLA_IFNAME])
2831 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2833 if (tb[IFLA_TARGET_NETNSID]) {
2834 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
2835 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
2836 if (IS_ERR(tgt_net))
2837 return PTR_ERR(tgt_net);
2841 ifm = nlmsg_data(nlh);
2842 if (ifm->ifi_index > 0)
2843 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
2844 else if (tb[IFLA_IFNAME])
2845 dev = __dev_get_by_name(tgt_net, ifname);
2846 else if (tb[IFLA_GROUP])
2847 err = rtnl_group_dellink(tgt_net, nla_get_u32(tb[IFLA_GROUP]));
2852 if (tb[IFLA_IFNAME] || ifm->ifi_index > 0)
2858 err = rtnl_delete_link(dev);
2867 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2869 unsigned int old_flags;
2872 old_flags = dev->flags;
2873 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2874 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
2880 if (dev->rtnl_link_state == RTNL_LINK_INITIALIZED) {
2881 __dev_notify_flags(dev, old_flags, (old_flags ^ dev->flags));
2883 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
2884 __dev_notify_flags(dev, old_flags, ~0U);
2888 EXPORT_SYMBOL(rtnl_configure_link);
2890 struct net_device *rtnl_create_link(struct net *net, const char *ifname,
2891 unsigned char name_assign_type,
2892 const struct rtnl_link_ops *ops,
2893 struct nlattr *tb[],
2894 struct netlink_ext_ack *extack)
2896 struct net_device *dev;
2897 unsigned int num_tx_queues = 1;
2898 unsigned int num_rx_queues = 1;
2900 if (tb[IFLA_NUM_TX_QUEUES])
2901 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2902 else if (ops->get_num_tx_queues)
2903 num_tx_queues = ops->get_num_tx_queues();
2905 if (tb[IFLA_NUM_RX_QUEUES])
2906 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2907 else if (ops->get_num_rx_queues)
2908 num_rx_queues = ops->get_num_rx_queues();
2910 if (num_tx_queues < 1 || num_tx_queues > 4096) {
2911 NL_SET_ERR_MSG(extack, "Invalid number of transmit queues");
2912 return ERR_PTR(-EINVAL);
2915 if (num_rx_queues < 1 || num_rx_queues > 4096) {
2916 NL_SET_ERR_MSG(extack, "Invalid number of receive queues");
2917 return ERR_PTR(-EINVAL);
2920 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
2921 ops->setup, num_tx_queues, num_rx_queues);
2923 return ERR_PTR(-ENOMEM);
2925 dev_net_set(dev, net);
2926 dev->rtnl_link_ops = ops;
2927 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
2930 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2931 if (tb[IFLA_ADDRESS]) {
2932 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2933 nla_len(tb[IFLA_ADDRESS]));
2934 dev->addr_assign_type = NET_ADDR_SET;
2936 if (tb[IFLA_BROADCAST])
2937 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2938 nla_len(tb[IFLA_BROADCAST]));
2939 if (tb[IFLA_TXQLEN])
2940 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2941 if (tb[IFLA_OPERSTATE])
2942 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2943 if (tb[IFLA_LINKMODE])
2944 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
2946 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2947 if (tb[IFLA_GSO_MAX_SIZE])
2948 netif_set_gso_max_size(dev, nla_get_u32(tb[IFLA_GSO_MAX_SIZE]));
2949 if (tb[IFLA_GSO_MAX_SEGS])
2950 dev->gso_max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
2954 EXPORT_SYMBOL(rtnl_create_link);
2956 static int rtnl_group_changelink(const struct sk_buff *skb,
2957 struct net *net, int group,
2958 struct ifinfomsg *ifm,
2959 struct netlink_ext_ack *extack,
2962 struct net_device *dev, *aux;
2965 for_each_netdev_safe(net, dev, aux) {
2966 if (dev->group == group) {
2967 err = do_setlink(skb, dev, ifm, extack, tb, NULL, 0);
2976 static int __rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2977 struct nlattr **attr, struct netlink_ext_ack *extack)
2979 struct nlattr *slave_attr[RTNL_SLAVE_MAX_TYPE + 1];
2980 unsigned char name_assign_type = NET_NAME_USER;
2981 struct nlattr *linkinfo[IFLA_INFO_MAX + 1];
2982 const struct rtnl_link_ops *m_ops = NULL;
2983 struct net_device *master_dev = NULL;
2984 struct net *net = sock_net(skb->sk);
2985 const struct rtnl_link_ops *ops;
2986 struct nlattr *tb[IFLA_MAX + 1];
2987 struct net *dest_net, *link_net;
2988 struct nlattr **slave_data;
2989 char kind[MODULE_NAME_LEN];
2990 struct net_device *dev;
2991 struct ifinfomsg *ifm;
2992 char ifname[IFNAMSIZ];
2993 struct nlattr **data;
2996 #ifdef CONFIG_MODULES
2999 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
3003 err = rtnl_ensure_unique_netns(tb, extack, false);
3007 if (tb[IFLA_IFNAME])
3008 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3012 ifm = nlmsg_data(nlh);
3013 if (ifm->ifi_index > 0)
3014 dev = __dev_get_by_index(net, ifm->ifi_index);
3017 dev = __dev_get_by_name(net, ifname);
3023 master_dev = netdev_master_upper_dev_get(dev);
3025 m_ops = master_dev->rtnl_link_ops;
3028 err = validate_linkmsg(dev, tb);
3032 if (tb[IFLA_LINKINFO]) {
3033 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
3034 tb[IFLA_LINKINFO], ifla_info_policy,
3039 memset(linkinfo, 0, sizeof(linkinfo));
3041 if (linkinfo[IFLA_INFO_KIND]) {
3042 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
3043 ops = rtnl_link_ops_get(kind);
3051 if (ops->maxtype > RTNL_MAX_TYPE)
3054 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
3055 err = nla_parse_nested(attr, ops->maxtype,
3056 linkinfo[IFLA_INFO_DATA],
3057 ops->policy, extack);
3062 if (ops->validate) {
3063 err = ops->validate(tb, data, extack);
3071 if (m_ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE)
3074 if (m_ops->slave_maxtype &&
3075 linkinfo[IFLA_INFO_SLAVE_DATA]) {
3076 err = nla_parse_nested(slave_attr, m_ops->slave_maxtype,
3077 linkinfo[IFLA_INFO_SLAVE_DATA],
3078 m_ops->slave_policy, extack);
3081 slave_data = slave_attr;
3088 if (nlh->nlmsg_flags & NLM_F_EXCL)
3090 if (nlh->nlmsg_flags & NLM_F_REPLACE)
3093 if (linkinfo[IFLA_INFO_DATA]) {
3094 if (!ops || ops != dev->rtnl_link_ops ||
3098 err = ops->changelink(dev, tb, data, extack);
3101 status |= DO_SETLINK_NOTIFY;
3104 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
3105 if (!m_ops || !m_ops->slave_changelink)
3108 err = m_ops->slave_changelink(master_dev, dev, tb,
3109 slave_data, extack);
3112 status |= DO_SETLINK_NOTIFY;
3115 return do_setlink(skb, dev, ifm, extack, tb, ifname, status);
3118 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
3119 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
3120 return rtnl_group_changelink(skb, net,
3121 nla_get_u32(tb[IFLA_GROUP]),
3126 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
3130 #ifdef CONFIG_MODULES
3133 request_module("rtnl-link-%s", kind);
3135 ops = rtnl_link_ops_get(kind);
3140 NL_SET_ERR_MSG(extack, "Unknown device type");
3148 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
3149 name_assign_type = NET_NAME_ENUM;
3152 dest_net = rtnl_link_get_net_capable(skb, net, tb, CAP_NET_ADMIN);
3153 if (IS_ERR(dest_net))
3154 return PTR_ERR(dest_net);
3156 if (tb[IFLA_LINK_NETNSID]) {
3157 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
3159 link_net = get_net_ns_by_id(dest_net, id);
3161 NL_SET_ERR_MSG(extack, "Unknown network namespace id");
3166 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
3172 dev = rtnl_create_link(link_net ? : dest_net, ifname,
3173 name_assign_type, ops, tb, extack);
3179 dev->ifindex = ifm->ifi_index;
3182 err = ops->newlink(link_net ? : net, dev, tb, data, extack);
3183 /* Drivers should call free_netdev() in ->destructor
3184 * and unregister it on failure after registration
3185 * so that device could be finally freed in rtnl_unlock.
3188 /* If device is not registered at all, free it now */
3189 if (dev->reg_state == NETREG_UNINITIALIZED)
3194 err = register_netdevice(dev);
3200 err = rtnl_configure_link(dev, ifm);
3202 goto out_unregister;
3204 err = dev_change_net_namespace(dev, dest_net, ifname);
3206 goto out_unregister;
3208 if (tb[IFLA_MASTER]) {
3209 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
3211 goto out_unregister;
3220 LIST_HEAD(list_kill);
3222 ops->dellink(dev, &list_kill);
3223 unregister_netdevice_many(&list_kill);
3225 unregister_netdevice(dev);
3230 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3231 struct netlink_ext_ack *extack)
3233 struct nlattr **attr;
3236 attr = kmalloc_array(RTNL_MAX_TYPE + 1, sizeof(*attr), GFP_KERNEL);
3240 ret = __rtnl_newlink(skb, nlh, attr, extack);
3245 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3246 struct netlink_ext_ack *extack)
3248 struct net *net = sock_net(skb->sk);
3249 struct net *tgt_net = net;
3250 struct ifinfomsg *ifm;
3251 char ifname[IFNAMSIZ];
3252 struct nlattr *tb[IFLA_MAX+1];
3253 struct net_device *dev = NULL;
3254 struct sk_buff *nskb;
3257 u32 ext_filter_mask = 0;
3259 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
3263 err = rtnl_ensure_unique_netns(tb, extack, true);
3267 if (tb[IFLA_TARGET_NETNSID]) {
3268 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
3269 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
3270 if (IS_ERR(tgt_net))
3271 return PTR_ERR(tgt_net);
3274 if (tb[IFLA_IFNAME])
3275 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3277 if (tb[IFLA_EXT_MASK])
3278 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3281 ifm = nlmsg_data(nlh);
3282 if (ifm->ifi_index > 0)
3283 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
3284 else if (tb[IFLA_IFNAME])
3285 dev = __dev_get_by_name(tgt_net, ifname);
3294 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
3298 err = rtnl_fill_ifinfo(nskb, dev, net,
3299 RTM_NEWLINK, NETLINK_CB(skb).portid,
3300 nlh->nlmsg_seq, 0, 0, ext_filter_mask,
3301 0, NULL, 0, netnsid);
3303 /* -EMSGSIZE implies BUG in if_nlmsg_size */
3304 WARN_ON(err == -EMSGSIZE);
3307 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
3315 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
3317 struct net *net = sock_net(skb->sk);
3318 struct net_device *dev;
3319 struct nlattr *tb[IFLA_MAX+1];
3320 u32 ext_filter_mask = 0;
3321 u16 min_ifinfo_dump_size = 0;
3324 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
3325 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
3326 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
3328 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
3329 if (tb[IFLA_EXT_MASK])
3330 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3333 if (!ext_filter_mask)
3334 return NLMSG_GOODSIZE;
3336 * traverse the list of net devices and compute the minimum
3337 * buffer size based upon the filter mask.
3340 for_each_netdev_rcu(net, dev) {
3341 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
3347 return nlmsg_total_size(min_ifinfo_dump_size);
3350 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
3353 int s_idx = cb->family;
3354 int type = cb->nlh->nlmsg_type - RTM_BASE;
3360 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
3361 struct rtnl_link **tab;
3362 struct rtnl_link *link;
3363 rtnl_dumpit_func dumpit;
3365 if (idx < s_idx || idx == PF_PACKET)
3368 if (type < 0 || type >= RTM_NR_MSGTYPES)
3371 tab = rcu_dereference_rtnl(rtnl_msg_handlers[idx]);
3379 dumpit = link->dumpit;
3384 memset(&cb->args[0], 0, sizeof(cb->args));
3388 ret = dumpit(skb, cb);
3394 return skb->len ? : ret;
3397 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
3398 unsigned int change,
3399 u32 event, gfp_t flags, int *new_nsid,
3402 struct net *net = dev_net(dev);
3403 struct sk_buff *skb;
3405 size_t if_info_size;
3407 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
3411 err = rtnl_fill_ifinfo(skb, dev, dev_net(dev),
3412 type, 0, 0, change, 0, 0, event,
3413 new_nsid, new_ifindex, -1);
3415 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
3416 WARN_ON(err == -EMSGSIZE);
3423 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
3427 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
3429 struct net *net = dev_net(dev);
3431 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
3434 static void rtmsg_ifinfo_event(int type, struct net_device *dev,
3435 unsigned int change, u32 event,
3436 gfp_t flags, int *new_nsid, int new_ifindex)
3438 struct sk_buff *skb;
3440 if (dev->reg_state != NETREG_REGISTERED)
3443 skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags, new_nsid,
3446 rtmsg_ifinfo_send(skb, dev, flags);
3449 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
3452 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
3456 void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change,
3457 gfp_t flags, int *new_nsid, int new_ifindex)
3459 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
3460 new_nsid, new_ifindex);
3463 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
3464 struct net_device *dev,
3465 u8 *addr, u16 vid, u32 pid, u32 seq,
3466 int type, unsigned int flags,
3467 int nlflags, u16 ndm_state)
3469 struct nlmsghdr *nlh;
3472 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
3476 ndm = nlmsg_data(nlh);
3477 ndm->ndm_family = AF_BRIDGE;
3480 ndm->ndm_flags = flags;
3482 ndm->ndm_ifindex = dev->ifindex;
3483 ndm->ndm_state = ndm_state;
3485 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
3486 goto nla_put_failure;
3488 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
3489 goto nla_put_failure;
3491 nlmsg_end(skb, nlh);
3495 nlmsg_cancel(skb, nlh);
3499 static inline size_t rtnl_fdb_nlmsg_size(void)
3501 return NLMSG_ALIGN(sizeof(struct ndmsg)) +
3502 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */
3503 nla_total_size(sizeof(u16)) + /* NDA_VLAN */
3507 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
3510 struct net *net = dev_net(dev);
3511 struct sk_buff *skb;
3514 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
3518 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
3519 0, 0, type, NTF_SELF, 0, ndm_state);
3525 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
3528 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
3532 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
3534 int ndo_dflt_fdb_add(struct ndmsg *ndm,
3535 struct nlattr *tb[],
3536 struct net_device *dev,
3537 const unsigned char *addr, u16 vid,
3542 /* If aging addresses are supported device will need to
3543 * implement its own handler for this.
3545 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
3546 pr_info("%s: FDB only supports static addresses\n", dev->name);
3551 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
3555 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3556 err = dev_uc_add_excl(dev, addr);
3557 else if (is_multicast_ether_addr(addr))
3558 err = dev_mc_add_excl(dev, addr);
3560 /* Only return duplicate errors if NLM_F_EXCL is set */
3561 if (err == -EEXIST && !(flags & NLM_F_EXCL))
3566 EXPORT_SYMBOL(ndo_dflt_fdb_add);
3568 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid,
3569 struct netlink_ext_ack *extack)
3574 if (nla_len(vlan_attr) != sizeof(u16)) {
3575 NL_SET_ERR_MSG(extack, "invalid vlan attribute size");
3579 vid = nla_get_u16(vlan_attr);
3581 if (!vid || vid >= VLAN_VID_MASK) {
3582 NL_SET_ERR_MSG(extack, "invalid vlan id");
3590 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
3591 struct netlink_ext_ack *extack)
3593 struct net *net = sock_net(skb->sk);
3595 struct nlattr *tb[NDA_MAX+1];
3596 struct net_device *dev;
3601 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
3605 ndm = nlmsg_data(nlh);
3606 if (ndm->ndm_ifindex == 0) {
3607 NL_SET_ERR_MSG(extack, "invalid ifindex");
3611 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3613 NL_SET_ERR_MSG(extack, "unknown ifindex");
3617 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3618 NL_SET_ERR_MSG(extack, "invalid address");
3622 if (dev->type != ARPHRD_ETHER) {
3623 NL_SET_ERR_MSG(extack, "FDB add only supported for Ethernet devices");
3627 addr = nla_data(tb[NDA_LLADDR]);
3629 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
3635 /* Support fdb on master device the net/bridge default case */
3636 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3637 (dev->priv_flags & IFF_BRIDGE_PORT)) {
3638 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3639 const struct net_device_ops *ops = br_dev->netdev_ops;
3641 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
3646 ndm->ndm_flags &= ~NTF_MASTER;
3649 /* Embedded bridge, macvlan, and any other device support */
3650 if ((ndm->ndm_flags & NTF_SELF)) {
3651 if (dev->netdev_ops->ndo_fdb_add)
3652 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
3656 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
3660 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
3662 ndm->ndm_flags &= ~NTF_SELF;
3670 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
3672 int ndo_dflt_fdb_del(struct ndmsg *ndm,
3673 struct nlattr *tb[],
3674 struct net_device *dev,
3675 const unsigned char *addr, u16 vid)
3679 /* If aging addresses are supported device will need to
3680 * implement its own handler for this.
3682 if (!(ndm->ndm_state & NUD_PERMANENT)) {
3683 pr_info("%s: FDB only supports static addresses\n", dev->name);
3687 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3688 err = dev_uc_del(dev, addr);
3689 else if (is_multicast_ether_addr(addr))
3690 err = dev_mc_del(dev, addr);
3694 EXPORT_SYMBOL(ndo_dflt_fdb_del);
3696 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
3697 struct netlink_ext_ack *extack)
3699 struct net *net = sock_net(skb->sk);
3701 struct nlattr *tb[NDA_MAX+1];
3702 struct net_device *dev;
3707 if (!netlink_capable(skb, CAP_NET_ADMIN))
3710 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
3714 ndm = nlmsg_data(nlh);
3715 if (ndm->ndm_ifindex == 0) {
3716 NL_SET_ERR_MSG(extack, "invalid ifindex");
3720 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3722 NL_SET_ERR_MSG(extack, "unknown ifindex");
3726 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3727 NL_SET_ERR_MSG(extack, "invalid address");
3731 if (dev->type != ARPHRD_ETHER) {
3732 NL_SET_ERR_MSG(extack, "FDB delete only supported for Ethernet devices");
3736 addr = nla_data(tb[NDA_LLADDR]);
3738 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
3744 /* Support fdb on master device the net/bridge default case */
3745 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3746 (dev->priv_flags & IFF_BRIDGE_PORT)) {
3747 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3748 const struct net_device_ops *ops = br_dev->netdev_ops;
3750 if (ops->ndo_fdb_del)
3751 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
3756 ndm->ndm_flags &= ~NTF_MASTER;
3759 /* Embedded bridge, macvlan, and any other device support */
3760 if (ndm->ndm_flags & NTF_SELF) {
3761 if (dev->netdev_ops->ndo_fdb_del)
3762 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
3765 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
3768 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
3770 ndm->ndm_flags &= ~NTF_SELF;
3777 static int nlmsg_populate_fdb(struct sk_buff *skb,
3778 struct netlink_callback *cb,
3779 struct net_device *dev,
3781 struct netdev_hw_addr_list *list)
3783 struct netdev_hw_addr *ha;
3787 portid = NETLINK_CB(cb->skb).portid;
3788 seq = cb->nlh->nlmsg_seq;
3790 list_for_each_entry(ha, &list->list, list) {
3791 if (*idx < cb->args[2])
3794 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
3796 RTM_NEWNEIGH, NTF_SELF,
3797 NLM_F_MULTI, NUD_PERMANENT);
3807 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
3808 * @nlh: netlink message header
3811 * Default netdevice operation to dump the existing unicast address list.
3812 * Returns number of addresses from list put in skb.
3814 int ndo_dflt_fdb_dump(struct sk_buff *skb,
3815 struct netlink_callback *cb,
3816 struct net_device *dev,
3817 struct net_device *filter_dev,
3822 if (dev->type != ARPHRD_ETHER)
3825 netif_addr_lock_bh(dev);
3826 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
3829 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
3831 netif_addr_unlock_bh(dev);
3834 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3836 static int valid_fdb_dump_strict(const struct nlmsghdr *nlh,
3837 int *br_idx, int *brport_idx,
3838 struct netlink_ext_ack *extack)
3840 struct nlattr *tb[NDA_MAX + 1];
3844 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
3845 NL_SET_ERR_MSG(extack, "Invalid header for fdb dump request");
3849 ndm = nlmsg_data(nlh);
3850 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state ||
3851 ndm->ndm_flags || ndm->ndm_type) {
3852 NL_SET_ERR_MSG(extack, "Invalid values in header for fbd dump request");
3856 err = nlmsg_parse_strict(nlh, sizeof(struct ndmsg), tb, NDA_MAX,
3861 *brport_idx = ndm->ndm_ifindex;
3862 for (i = 0; i <= NDA_MAX; ++i) {
3868 if (nla_len(tb[i]) != sizeof(u32)) {
3869 NL_SET_ERR_MSG(extack, "Invalid IFINDEX attribute in fdb dump request");
3872 *brport_idx = nla_get_u32(tb[NDA_IFINDEX]);
3875 if (nla_len(tb[i]) != sizeof(u32)) {
3876 NL_SET_ERR_MSG(extack, "Invalid MASTER attribute in fdb dump request");
3879 *br_idx = nla_get_u32(tb[NDA_MASTER]);
3882 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb dump request");
3890 static int valid_fdb_dump_legacy(const struct nlmsghdr *nlh,
3891 int *br_idx, int *brport_idx,
3892 struct netlink_ext_ack *extack)
3894 struct nlattr *tb[IFLA_MAX+1];
3897 /* A hack to preserve kernel<->userspace interface.
3898 * Before Linux v4.12 this code accepted ndmsg since iproute2 v3.3.0.
3899 * However, ndmsg is shorter than ifinfomsg thus nlmsg_parse() bails.
3900 * So, check for ndmsg with an optional u32 attribute (not used here).
3901 * Fortunately these sizes don't conflict with the size of ifinfomsg
3902 * with an optional attribute.
3904 if (nlmsg_len(nlh) != sizeof(struct ndmsg) &&
3905 (nlmsg_len(nlh) != sizeof(struct ndmsg) +
3906 nla_attr_size(sizeof(u32)))) {
3907 struct ifinfomsg *ifm;
3909 err = nlmsg_parse(nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
3910 ifla_policy, extack);
3913 } else if (err == 0) {
3914 if (tb[IFLA_MASTER])
3915 *br_idx = nla_get_u32(tb[IFLA_MASTER]);
3918 ifm = nlmsg_data(nlh);
3919 *brport_idx = ifm->ifi_index;
3924 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3926 struct net_device *dev;
3927 struct net_device *br_dev = NULL;
3928 const struct net_device_ops *ops = NULL;
3929 const struct net_device_ops *cops = NULL;
3930 struct net *net = sock_net(skb->sk);
3931 struct hlist_head *head;
3939 if (cb->strict_check)
3940 err = valid_fdb_dump_strict(cb->nlh, &br_idx, &brport_idx,
3943 err = valid_fdb_dump_legacy(cb->nlh, &br_idx, &brport_idx,
3949 br_dev = __dev_get_by_index(net, br_idx);
3953 ops = br_dev->netdev_ops;
3957 s_idx = cb->args[1];
3959 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3961 head = &net->dev_index_head[h];
3962 hlist_for_each_entry(dev, head, index_hlist) {
3964 if (brport_idx && (dev->ifindex != brport_idx))
3967 if (!br_idx) { /* user did not specify a specific bridge */
3968 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3969 br_dev = netdev_master_upper_dev_get(dev);
3970 cops = br_dev->netdev_ops;
3973 if (dev != br_dev &&
3974 !(dev->priv_flags & IFF_BRIDGE_PORT))
3977 if (br_dev != netdev_master_upper_dev_get(dev) &&
3978 !(dev->priv_flags & IFF_EBRIDGE))
3986 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3987 if (cops && cops->ndo_fdb_dump) {
3988 err = cops->ndo_fdb_dump(skb, cb,
3991 if (err == -EMSGSIZE)
3996 if (dev->netdev_ops->ndo_fdb_dump)
3997 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
4001 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
4003 if (err == -EMSGSIZE)
4008 /* reset fdb offset to 0 for rest of the interfaces */
4024 static int valid_fdb_get_strict(const struct nlmsghdr *nlh,
4025 struct nlattr **tb, u8 *ndm_flags,
4026 int *br_idx, int *brport_idx, u8 **addr,
4027 u16 *vid, struct netlink_ext_ack *extack)
4032 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
4033 NL_SET_ERR_MSG(extack, "Invalid header for fdb get request");
4037 ndm = nlmsg_data(nlh);
4038 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state ||
4040 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb get request");
4044 if (ndm->ndm_flags & ~(NTF_MASTER | NTF_SELF)) {
4045 NL_SET_ERR_MSG(extack, "Invalid flags in header for fdb get request");
4049 err = nlmsg_parse_strict(nlh, sizeof(struct ndmsg), tb, NDA_MAX,
4050 nda_policy, extack);
4054 *ndm_flags = ndm->ndm_flags;
4055 *brport_idx = ndm->ndm_ifindex;
4056 for (i = 0; i <= NDA_MAX; ++i) {
4062 *br_idx = nla_get_u32(tb[i]);
4065 if (nla_len(tb[i]) != ETH_ALEN) {
4066 NL_SET_ERR_MSG(extack, "Invalid address in fdb get request");
4069 *addr = nla_data(tb[i]);
4072 err = fdb_vid_parse(tb[i], vid, extack);
4079 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb get request");
4087 static int rtnl_fdb_get(struct sk_buff *in_skb, struct nlmsghdr *nlh,
4088 struct netlink_ext_ack *extack)
4090 struct net_device *dev = NULL, *br_dev = NULL;
4091 const struct net_device_ops *ops = NULL;
4092 struct net *net = sock_net(in_skb->sk);
4093 struct nlattr *tb[NDA_MAX + 1];
4094 struct sk_buff *skb;
4102 err = valid_fdb_get_strict(nlh, tb, &ndm_flags, &br_idx,
4103 &brport_idx, &addr, &vid, extack);
4108 dev = __dev_get_by_index(net, brport_idx);
4110 NL_SET_ERR_MSG(extack, "Unknown device ifindex");
4117 NL_SET_ERR_MSG(extack, "Master and device are mutually exclusive");
4121 br_dev = __dev_get_by_index(net, br_idx);
4123 NL_SET_ERR_MSG(extack, "Invalid master ifindex");
4126 ops = br_dev->netdev_ops;
4130 if (!ndm_flags || (ndm_flags & NTF_MASTER)) {
4131 if (!(dev->priv_flags & IFF_BRIDGE_PORT)) {
4132 NL_SET_ERR_MSG(extack, "Device is not a bridge port");
4135 br_dev = netdev_master_upper_dev_get(dev);
4137 NL_SET_ERR_MSG(extack, "Master of device not found");
4140 ops = br_dev->netdev_ops;
4142 if (!(ndm_flags & NTF_SELF)) {
4143 NL_SET_ERR_MSG(extack, "Missing NTF_SELF");
4146 ops = dev->netdev_ops;
4150 if (!br_dev && !dev) {
4151 NL_SET_ERR_MSG(extack, "No device specified");
4155 if (!ops || !ops->ndo_fdb_get) {
4156 NL_SET_ERR_MSG(extack, "Fdb get operation not supported by device");
4160 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
4166 err = ops->ndo_fdb_get(skb, tb, dev, addr, vid,
4167 NETLINK_CB(in_skb).portid,
4168 nlh->nlmsg_seq, extack);
4172 return rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
4178 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
4179 unsigned int attrnum, unsigned int flag)
4182 return nla_put_u8(skb, attrnum, !!(flags & flag));
4186 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
4187 struct net_device *dev, u16 mode,
4188 u32 flags, u32 mask, int nlflags,
4190 int (*vlan_fill)(struct sk_buff *skb,
4191 struct net_device *dev,
4194 struct nlmsghdr *nlh;
4195 struct ifinfomsg *ifm;
4196 struct nlattr *br_afspec;
4197 struct nlattr *protinfo;
4198 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
4199 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4202 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
4206 ifm = nlmsg_data(nlh);
4207 ifm->ifi_family = AF_BRIDGE;
4209 ifm->ifi_type = dev->type;
4210 ifm->ifi_index = dev->ifindex;
4211 ifm->ifi_flags = dev_get_flags(dev);
4212 ifm->ifi_change = 0;
4215 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
4216 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
4217 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
4219 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
4221 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
4222 (dev->ifindex != dev_get_iflink(dev) &&
4223 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
4224 goto nla_put_failure;
4226 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
4228 goto nla_put_failure;
4230 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
4231 nla_nest_cancel(skb, br_afspec);
4232 goto nla_put_failure;
4235 if (mode != BRIDGE_MODE_UNDEF) {
4236 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
4237 nla_nest_cancel(skb, br_afspec);
4238 goto nla_put_failure;
4242 err = vlan_fill(skb, dev, filter_mask);
4244 nla_nest_cancel(skb, br_afspec);
4245 goto nla_put_failure;
4248 nla_nest_end(skb, br_afspec);
4250 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
4252 goto nla_put_failure;
4254 if (brport_nla_put_flag(skb, flags, mask,
4255 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
4256 brport_nla_put_flag(skb, flags, mask,
4257 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
4258 brport_nla_put_flag(skb, flags, mask,
4259 IFLA_BRPORT_FAST_LEAVE,
4260 BR_MULTICAST_FAST_LEAVE) ||
4261 brport_nla_put_flag(skb, flags, mask,
4262 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
4263 brport_nla_put_flag(skb, flags, mask,
4264 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
4265 brport_nla_put_flag(skb, flags, mask,
4266 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
4267 brport_nla_put_flag(skb, flags, mask,
4268 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
4269 brport_nla_put_flag(skb, flags, mask,
4270 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
4271 nla_nest_cancel(skb, protinfo);
4272 goto nla_put_failure;
4275 nla_nest_end(skb, protinfo);
4277 nlmsg_end(skb, nlh);
4280 nlmsg_cancel(skb, nlh);
4281 return err ? err : -EMSGSIZE;
4283 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
4285 static int valid_bridge_getlink_req(const struct nlmsghdr *nlh,
4286 bool strict_check, u32 *filter_mask,
4287 struct netlink_ext_ack *extack)
4289 struct nlattr *tb[IFLA_MAX+1];
4293 struct ifinfomsg *ifm;
4295 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
4296 NL_SET_ERR_MSG(extack, "Invalid header for bridge link dump");
4300 ifm = nlmsg_data(nlh);
4301 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
4302 ifm->ifi_change || ifm->ifi_index) {
4303 NL_SET_ERR_MSG(extack, "Invalid values in header for bridge link dump request");
4307 err = nlmsg_parse_strict(nlh, sizeof(struct ifinfomsg), tb,
4308 IFLA_MAX, ifla_policy, extack);
4310 err = nlmsg_parse(nlh, sizeof(struct ifinfomsg), tb,
4311 IFLA_MAX, ifla_policy, extack);
4316 /* new attributes should only be added with strict checking */
4317 for (i = 0; i <= IFLA_MAX; ++i) {
4323 *filter_mask = nla_get_u32(tb[i]);
4327 NL_SET_ERR_MSG(extack, "Unsupported attribute in bridge link dump request");
4336 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
4338 const struct nlmsghdr *nlh = cb->nlh;
4339 struct net *net = sock_net(skb->sk);
4340 struct net_device *dev;
4342 u32 portid = NETLINK_CB(cb->skb).portid;
4343 u32 seq = nlh->nlmsg_seq;
4344 u32 filter_mask = 0;
4347 err = valid_bridge_getlink_req(nlh, cb->strict_check, &filter_mask,
4349 if (err < 0 && cb->strict_check)
4353 for_each_netdev_rcu(net, dev) {
4354 const struct net_device_ops *ops = dev->netdev_ops;
4355 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4357 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
4358 if (idx >= cb->args[0]) {
4359 err = br_dev->netdev_ops->ndo_bridge_getlink(
4360 skb, portid, seq, dev,
4361 filter_mask, NLM_F_MULTI);
4362 if (err < 0 && err != -EOPNOTSUPP) {
4363 if (likely(skb->len))
4372 if (ops->ndo_bridge_getlink) {
4373 if (idx >= cb->args[0]) {
4374 err = ops->ndo_bridge_getlink(skb, portid,
4378 if (err < 0 && err != -EOPNOTSUPP) {
4379 if (likely(skb->len))
4396 static inline size_t bridge_nlmsg_size(void)
4398 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
4399 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
4400 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
4401 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
4402 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
4403 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
4404 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
4405 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
4406 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
4407 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
4408 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
4411 static int rtnl_bridge_notify(struct net_device *dev)
4413 struct net *net = dev_net(dev);
4414 struct sk_buff *skb;
4415 int err = -EOPNOTSUPP;
4417 if (!dev->netdev_ops->ndo_bridge_getlink)
4420 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
4426 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
4433 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
4436 WARN_ON(err == -EMSGSIZE);
4439 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
4443 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
4444 struct netlink_ext_ack *extack)
4446 struct net *net = sock_net(skb->sk);
4447 struct ifinfomsg *ifm;
4448 struct net_device *dev;
4449 struct nlattr *br_spec, *attr = NULL;
4450 int rem, err = -EOPNOTSUPP;
4452 bool have_flags = false;
4454 if (nlmsg_len(nlh) < sizeof(*ifm))
4457 ifm = nlmsg_data(nlh);
4458 if (ifm->ifi_family != AF_BRIDGE)
4459 return -EPFNOSUPPORT;
4461 dev = __dev_get_by_index(net, ifm->ifi_index);
4463 NL_SET_ERR_MSG(extack, "unknown ifindex");
4467 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
4469 nla_for_each_nested(attr, br_spec, rem) {
4470 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
4471 if (nla_len(attr) < sizeof(flags))
4475 flags = nla_get_u16(attr);
4481 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
4482 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4484 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
4489 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags,
4494 flags &= ~BRIDGE_FLAGS_MASTER;
4497 if ((flags & BRIDGE_FLAGS_SELF)) {
4498 if (!dev->netdev_ops->ndo_bridge_setlink)
4501 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
4505 flags &= ~BRIDGE_FLAGS_SELF;
4507 /* Generate event to notify upper layer of bridge
4510 err = rtnl_bridge_notify(dev);
4515 memcpy(nla_data(attr), &flags, sizeof(flags));
4520 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
4521 struct netlink_ext_ack *extack)
4523 struct net *net = sock_net(skb->sk);
4524 struct ifinfomsg *ifm;
4525 struct net_device *dev;
4526 struct nlattr *br_spec, *attr = NULL;
4527 int rem, err = -EOPNOTSUPP;
4529 bool have_flags = false;
4531 if (nlmsg_len(nlh) < sizeof(*ifm))
4534 ifm = nlmsg_data(nlh);
4535 if (ifm->ifi_family != AF_BRIDGE)
4536 return -EPFNOSUPPORT;
4538 dev = __dev_get_by_index(net, ifm->ifi_index);
4540 NL_SET_ERR_MSG(extack, "unknown ifindex");
4544 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
4546 nla_for_each_nested(attr, br_spec, rem) {
4547 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
4548 if (nla_len(attr) < sizeof(flags))
4552 flags = nla_get_u16(attr);
4558 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
4559 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4561 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
4566 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
4570 flags &= ~BRIDGE_FLAGS_MASTER;
4573 if ((flags & BRIDGE_FLAGS_SELF)) {
4574 if (!dev->netdev_ops->ndo_bridge_dellink)
4577 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
4581 flags &= ~BRIDGE_FLAGS_SELF;
4583 /* Generate event to notify upper layer of bridge
4586 err = rtnl_bridge_notify(dev);
4591 memcpy(nla_data(attr), &flags, sizeof(flags));
4596 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
4598 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
4599 (!idxattr || idxattr == attrid);
4602 #define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1)
4603 static int rtnl_get_offload_stats_attr_size(int attr_id)
4606 case IFLA_OFFLOAD_XSTATS_CPU_HIT:
4607 return sizeof(struct rtnl_link_stats64);
4613 static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev,
4616 struct nlattr *attr = NULL;
4621 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
4622 dev->netdev_ops->ndo_get_offload_stats))
4625 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
4626 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
4627 if (attr_id < *prividx)
4630 size = rtnl_get_offload_stats_attr_size(attr_id);
4634 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
4637 attr = nla_reserve_64bit(skb, attr_id, size,
4638 IFLA_OFFLOAD_XSTATS_UNSPEC);
4640 goto nla_put_failure;
4642 attr_data = nla_data(attr);
4643 memset(attr_data, 0, size);
4644 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev,
4647 goto get_offload_stats_failure;
4658 get_offload_stats_failure:
4663 static int rtnl_get_offload_stats_size(const struct net_device *dev)
4669 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
4670 dev->netdev_ops->ndo_get_offload_stats))
4673 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
4674 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
4675 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
4677 size = rtnl_get_offload_stats_attr_size(attr_id);
4678 nla_size += nla_total_size_64bit(size);
4682 nla_size += nla_total_size(0);
4687 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
4688 int type, u32 pid, u32 seq, u32 change,
4689 unsigned int flags, unsigned int filter_mask,
4690 int *idxattr, int *prividx)
4692 struct if_stats_msg *ifsm;
4693 struct nlmsghdr *nlh;
4694 struct nlattr *attr;
4695 int s_prividx = *prividx;
4700 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
4704 ifsm = nlmsg_data(nlh);
4705 ifsm->family = PF_UNSPEC;
4708 ifsm->ifindex = dev->ifindex;
4709 ifsm->filter_mask = filter_mask;
4711 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
4712 struct rtnl_link_stats64 *sp;
4714 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
4715 sizeof(struct rtnl_link_stats64),
4718 goto nla_put_failure;
4720 sp = nla_data(attr);
4721 dev_get_stats(dev, sp);
4724 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
4725 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
4727 if (ops && ops->fill_linkxstats) {
4728 *idxattr = IFLA_STATS_LINK_XSTATS;
4729 attr = nla_nest_start(skb,
4730 IFLA_STATS_LINK_XSTATS);
4732 goto nla_put_failure;
4734 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
4735 nla_nest_end(skb, attr);
4737 goto nla_put_failure;
4742 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
4744 const struct rtnl_link_ops *ops = NULL;
4745 const struct net_device *master;
4747 master = netdev_master_upper_dev_get(dev);
4749 ops = master->rtnl_link_ops;
4750 if (ops && ops->fill_linkxstats) {
4751 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
4752 attr = nla_nest_start(skb,
4753 IFLA_STATS_LINK_XSTATS_SLAVE);
4755 goto nla_put_failure;
4757 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
4758 nla_nest_end(skb, attr);
4760 goto nla_put_failure;
4765 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
4767 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
4768 attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS);
4770 goto nla_put_failure;
4772 err = rtnl_get_offload_stats(skb, dev, prividx);
4773 if (err == -ENODATA)
4774 nla_nest_cancel(skb, attr);
4776 nla_nest_end(skb, attr);
4778 if (err && err != -ENODATA)
4779 goto nla_put_failure;
4783 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
4784 struct rtnl_af_ops *af_ops;
4786 *idxattr = IFLA_STATS_AF_SPEC;
4787 attr = nla_nest_start(skb, IFLA_STATS_AF_SPEC);
4789 goto nla_put_failure;
4792 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
4793 if (af_ops->fill_stats_af) {
4797 af = nla_nest_start(skb, af_ops->family);
4800 goto nla_put_failure;
4802 err = af_ops->fill_stats_af(skb, dev);
4804 if (err == -ENODATA) {
4805 nla_nest_cancel(skb, af);
4806 } else if (err < 0) {
4808 goto nla_put_failure;
4811 nla_nest_end(skb, af);
4816 nla_nest_end(skb, attr);
4821 nlmsg_end(skb, nlh);
4826 /* not a multi message or no progress mean a real error */
4827 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
4828 nlmsg_cancel(skb, nlh);
4830 nlmsg_end(skb, nlh);
4835 static size_t if_nlmsg_stats_size(const struct net_device *dev,
4840 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
4841 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
4843 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
4844 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
4845 int attr = IFLA_STATS_LINK_XSTATS;
4847 if (ops && ops->get_linkxstats_size) {
4848 size += nla_total_size(ops->get_linkxstats_size(dev,
4850 /* for IFLA_STATS_LINK_XSTATS */
4851 size += nla_total_size(0);
4855 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
4856 struct net_device *_dev = (struct net_device *)dev;
4857 const struct rtnl_link_ops *ops = NULL;
4858 const struct net_device *master;
4860 /* netdev_master_upper_dev_get can't take const */
4861 master = netdev_master_upper_dev_get(_dev);
4863 ops = master->rtnl_link_ops;
4864 if (ops && ops->get_linkxstats_size) {
4865 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
4867 size += nla_total_size(ops->get_linkxstats_size(dev,
4869 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
4870 size += nla_total_size(0);
4874 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
4875 size += rtnl_get_offload_stats_size(dev);
4877 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
4878 struct rtnl_af_ops *af_ops;
4880 /* for IFLA_STATS_AF_SPEC */
4881 size += nla_total_size(0);
4884 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
4885 if (af_ops->get_stats_af_size) {
4886 size += nla_total_size(
4887 af_ops->get_stats_af_size(dev));
4890 size += nla_total_size(0);
4899 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
4900 struct netlink_ext_ack *extack)
4902 struct net *net = sock_net(skb->sk);
4903 struct net_device *dev = NULL;
4904 int idxattr = 0, prividx = 0;
4905 struct if_stats_msg *ifsm;
4906 struct sk_buff *nskb;
4910 if (nlmsg_len(nlh) < sizeof(*ifsm))
4913 ifsm = nlmsg_data(nlh);
4914 if (ifsm->ifindex > 0)
4915 dev = __dev_get_by_index(net, ifsm->ifindex);
4922 filter_mask = ifsm->filter_mask;
4926 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
4930 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
4931 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
4932 0, filter_mask, &idxattr, &prividx);
4934 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
4935 WARN_ON(err == -EMSGSIZE);
4938 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
4944 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
4946 struct netlink_ext_ack *extack = cb->extack;
4947 int h, s_h, err, s_idx, s_idxattr, s_prividx;
4948 struct net *net = sock_net(skb->sk);
4949 unsigned int flags = NLM_F_MULTI;
4950 struct if_stats_msg *ifsm;
4951 struct hlist_head *head;
4952 struct net_device *dev;
4953 u32 filter_mask = 0;
4957 s_idx = cb->args[1];
4958 s_idxattr = cb->args[2];
4959 s_prividx = cb->args[3];
4961 cb->seq = net->dev_base_seq;
4963 if (nlmsg_len(cb->nlh) < sizeof(*ifsm)) {
4964 NL_SET_ERR_MSG(extack, "Invalid header for stats dump");
4968 ifsm = nlmsg_data(cb->nlh);
4970 /* only requests using strict checks can pass data to influence
4971 * the dump. The legacy exception is filter_mask.
4973 if (cb->strict_check) {
4974 if (ifsm->pad1 || ifsm->pad2 || ifsm->ifindex) {
4975 NL_SET_ERR_MSG(extack, "Invalid values in header for stats dump request");
4978 if (nlmsg_attrlen(cb->nlh, sizeof(*ifsm))) {
4979 NL_SET_ERR_MSG(extack, "Invalid attributes after stats header");
4984 filter_mask = ifsm->filter_mask;
4986 NL_SET_ERR_MSG(extack, "Filter mask must be set for stats dump");
4990 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4992 head = &net->dev_index_head[h];
4993 hlist_for_each_entry(dev, head, index_hlist) {
4996 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
4997 NETLINK_CB(cb->skb).portid,
4998 cb->nlh->nlmsg_seq, 0,
5000 &s_idxattr, &s_prividx);
5001 /* If we ran out of room on the first message,
5004 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
5010 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
5016 cb->args[3] = s_prividx;
5017 cb->args[2] = s_idxattr;
5024 /* Process one rtnetlink message. */
5026 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
5027 struct netlink_ext_ack *extack)
5029 struct net *net = sock_net(skb->sk);
5030 struct rtnl_link *link;
5031 struct module *owner;
5032 int err = -EOPNOTSUPP;
5033 rtnl_doit_func doit;
5039 type = nlh->nlmsg_type;
5045 /* All the messages must have at least 1 byte length */
5046 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
5049 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
5052 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
5056 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
5058 rtnl_dumpit_func dumpit;
5059 u16 min_dump_alloc = 0;
5061 link = rtnl_get_link(family, type);
5062 if (!link || !link->dumpit) {
5064 link = rtnl_get_link(family, type);
5065 if (!link || !link->dumpit)
5068 owner = link->owner;
5069 dumpit = link->dumpit;
5071 if (type == RTM_GETLINK - RTM_BASE)
5072 min_dump_alloc = rtnl_calcit(skb, nlh);
5075 /* need to do this before rcu_read_unlock() */
5076 if (!try_module_get(owner))
5077 err = -EPROTONOSUPPORT;
5083 struct netlink_dump_control c = {
5085 .min_dump_alloc = min_dump_alloc,
5088 err = netlink_dump_start(rtnl, skb, nlh, &c);
5089 /* netlink_dump_start() will keep a reference on
5090 * module if dump is still in progress.
5097 link = rtnl_get_link(family, type);
5098 if (!link || !link->doit) {
5100 link = rtnl_get_link(PF_UNSPEC, type);
5101 if (!link || !link->doit)
5105 owner = link->owner;
5106 if (!try_module_get(owner)) {
5107 err = -EPROTONOSUPPORT;
5111 flags = link->flags;
5112 if (flags & RTNL_FLAG_DOIT_UNLOCKED) {
5116 err = doit(skb, nlh, extack);
5123 link = rtnl_get_link(family, type);
5124 if (link && link->doit)
5125 err = link->doit(skb, nlh, extack);
5141 static void rtnetlink_rcv(struct sk_buff *skb)
5143 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
5146 static int rtnetlink_bind(struct net *net, int group)
5149 case RTNLGRP_IPV4_MROUTE_R:
5150 case RTNLGRP_IPV6_MROUTE_R:
5151 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
5158 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
5160 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
5164 case NETDEV_CHANGEMTU:
5165 case NETDEV_CHANGEADDR:
5166 case NETDEV_CHANGENAME:
5167 case NETDEV_FEAT_CHANGE:
5168 case NETDEV_BONDING_FAILOVER:
5169 case NETDEV_POST_TYPE_CHANGE:
5170 case NETDEV_NOTIFY_PEERS:
5171 case NETDEV_CHANGEUPPER:
5172 case NETDEV_RESEND_IGMP:
5173 case NETDEV_CHANGEINFODATA:
5174 case NETDEV_CHANGELOWERSTATE:
5175 case NETDEV_CHANGE_TX_QUEUE_LEN:
5176 rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event),
5177 GFP_KERNEL, NULL, 0);
5185 static struct notifier_block rtnetlink_dev_notifier = {
5186 .notifier_call = rtnetlink_event,
5190 static int __net_init rtnetlink_net_init(struct net *net)
5193 struct netlink_kernel_cfg cfg = {
5194 .groups = RTNLGRP_MAX,
5195 .input = rtnetlink_rcv,
5196 .cb_mutex = &rtnl_mutex,
5197 .flags = NL_CFG_F_NONROOT_RECV,
5198 .bind = rtnetlink_bind,
5201 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
5208 static void __net_exit rtnetlink_net_exit(struct net *net)
5210 netlink_kernel_release(net->rtnl);
5214 static struct pernet_operations rtnetlink_net_ops = {
5215 .init = rtnetlink_net_init,
5216 .exit = rtnetlink_net_exit,
5219 void __init rtnetlink_init(void)
5221 if (register_pernet_subsys(&rtnetlink_net_ops))
5222 panic("rtnetlink_init: cannot initialize rtnetlink\n");
5224 register_netdevice_notifier(&rtnetlink_dev_notifier);
5226 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
5227 rtnl_dump_ifinfo, 0);
5228 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, 0);
5229 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, 0);
5230 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, 0);
5232 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, 0);
5233 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, 0);
5234 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, 0);
5236 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0);
5237 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, 0);
5238 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, rtnl_fdb_get, rtnl_fdb_dump, 0);
5240 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, 0);
5241 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, 0);
5242 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, 0);
5244 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,