2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Routing netlink socket interface: protocol independent part.
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
19 #include <linux/errno.h>
20 #include <linux/module.h>
21 #include <linux/types.h>
22 #include <linux/socket.h>
23 #include <linux/kernel.h>
24 #include <linux/timer.h>
25 #include <linux/string.h>
26 #include <linux/sockios.h>
27 #include <linux/net.h>
28 #include <linux/fcntl.h>
30 #include <linux/slab.h>
31 #include <linux/interrupt.h>
32 #include <linux/capability.h>
33 #include <linux/skbuff.h>
34 #include <linux/init.h>
35 #include <linux/security.h>
36 #include <linux/mutex.h>
37 #include <linux/if_addr.h>
38 #include <linux/if_bridge.h>
39 #include <linux/if_vlan.h>
40 #include <linux/pci.h>
41 #include <linux/etherdevice.h>
43 #include <asm/uaccess.h>
45 #include <linux/inet.h>
46 #include <linux/netdevice.h>
47 #include <net/switchdev.h>
49 #include <net/protocol.h>
51 #include <net/route.h>
55 #include <net/pkt_sched.h>
56 #include <net/fib_rules.h>
57 #include <net/rtnetlink.h>
58 #include <net/net_namespace.h>
62 rtnl_dumpit_func dumpit;
63 rtnl_calcit_func calcit;
66 static DEFINE_MUTEX(rtnl_mutex);
70 mutex_lock(&rtnl_mutex);
72 EXPORT_SYMBOL(rtnl_lock);
74 void __rtnl_unlock(void)
76 mutex_unlock(&rtnl_mutex);
79 void rtnl_unlock(void)
81 /* This fellow will unlock it for us. */
84 EXPORT_SYMBOL(rtnl_unlock);
86 int rtnl_trylock(void)
88 return mutex_trylock(&rtnl_mutex);
90 EXPORT_SYMBOL(rtnl_trylock);
92 int rtnl_is_locked(void)
94 return mutex_is_locked(&rtnl_mutex);
96 EXPORT_SYMBOL(rtnl_is_locked);
98 #ifdef CONFIG_PROVE_LOCKING
99 bool lockdep_rtnl_is_held(void)
101 return lockdep_is_held(&rtnl_mutex);
103 EXPORT_SYMBOL(lockdep_rtnl_is_held);
104 #endif /* #ifdef CONFIG_PROVE_LOCKING */
106 static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
108 static inline int rtm_msgindex(int msgtype)
110 int msgindex = msgtype - RTM_BASE;
113 * msgindex < 0 implies someone tried to register a netlink
114 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
115 * the message type has not been added to linux/rtnetlink.h
117 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
122 static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
124 struct rtnl_link *tab;
126 if (protocol <= RTNL_FAMILY_MAX)
127 tab = rtnl_msg_handlers[protocol];
131 if (tab == NULL || tab[msgindex].doit == NULL)
132 tab = rtnl_msg_handlers[PF_UNSPEC];
134 return tab[msgindex].doit;
137 static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
139 struct rtnl_link *tab;
141 if (protocol <= RTNL_FAMILY_MAX)
142 tab = rtnl_msg_handlers[protocol];
146 if (tab == NULL || tab[msgindex].dumpit == NULL)
147 tab = rtnl_msg_handlers[PF_UNSPEC];
149 return tab[msgindex].dumpit;
152 static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
154 struct rtnl_link *tab;
156 if (protocol <= RTNL_FAMILY_MAX)
157 tab = rtnl_msg_handlers[protocol];
161 if (tab == NULL || tab[msgindex].calcit == NULL)
162 tab = rtnl_msg_handlers[PF_UNSPEC];
164 return tab[msgindex].calcit;
168 * __rtnl_register - Register a rtnetlink message type
169 * @protocol: Protocol family or PF_UNSPEC
170 * @msgtype: rtnetlink message type
171 * @doit: Function pointer called for each request message
172 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
173 * @calcit: Function pointer to calc size of dump message
175 * Registers the specified function pointers (at least one of them has
176 * to be non-NULL) to be called whenever a request message for the
177 * specified protocol family and message type is received.
179 * The special protocol family PF_UNSPEC may be used to define fallback
180 * function pointers for the case when no entry for the specific protocol
183 * Returns 0 on success or a negative error code.
185 int __rtnl_register(int protocol, int msgtype,
186 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
187 rtnl_calcit_func calcit)
189 struct rtnl_link *tab;
192 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
193 msgindex = rtm_msgindex(msgtype);
195 tab = rtnl_msg_handlers[protocol];
197 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
201 rtnl_msg_handlers[protocol] = tab;
205 tab[msgindex].doit = doit;
208 tab[msgindex].dumpit = dumpit;
211 tab[msgindex].calcit = calcit;
215 EXPORT_SYMBOL_GPL(__rtnl_register);
218 * rtnl_register - Register a rtnetlink message type
220 * Identical to __rtnl_register() but panics on failure. This is useful
221 * as failure of this function is very unlikely, it can only happen due
222 * to lack of memory when allocating the chain to store all message
223 * handlers for a protocol. Meant for use in init functions where lack
224 * of memory implies no sense in continuing.
226 void rtnl_register(int protocol, int msgtype,
227 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
228 rtnl_calcit_func calcit)
230 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
231 panic("Unable to register rtnetlink message handler, "
232 "protocol = %d, message type = %d\n",
235 EXPORT_SYMBOL_GPL(rtnl_register);
238 * rtnl_unregister - Unregister a rtnetlink message type
239 * @protocol: Protocol family or PF_UNSPEC
240 * @msgtype: rtnetlink message type
242 * Returns 0 on success or a negative error code.
244 int rtnl_unregister(int protocol, int msgtype)
248 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
249 msgindex = rtm_msgindex(msgtype);
251 if (rtnl_msg_handlers[protocol] == NULL)
254 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
255 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
259 EXPORT_SYMBOL_GPL(rtnl_unregister);
262 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
263 * @protocol : Protocol family or PF_UNSPEC
265 * Identical to calling rtnl_unregster() for all registered message types
266 * of a certain protocol family.
268 void rtnl_unregister_all(int protocol)
270 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
272 kfree(rtnl_msg_handlers[protocol]);
273 rtnl_msg_handlers[protocol] = NULL;
275 EXPORT_SYMBOL_GPL(rtnl_unregister_all);
277 static LIST_HEAD(link_ops);
279 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
281 const struct rtnl_link_ops *ops;
283 list_for_each_entry(ops, &link_ops, list) {
284 if (!strcmp(ops->kind, kind))
291 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
292 * @ops: struct rtnl_link_ops * to register
294 * The caller must hold the rtnl_mutex. This function should be used
295 * by drivers that create devices during module initialization. It
296 * must be called before registering the devices.
298 * Returns 0 on success or a negative error code.
300 int __rtnl_link_register(struct rtnl_link_ops *ops)
302 if (rtnl_link_ops_get(ops->kind))
305 /* The check for setup is here because if ops
306 * does not have that filled up, it is not possible
307 * to use the ops for creating device. So do not
308 * fill up dellink as well. That disables rtnl_dellink.
310 if (ops->setup && !ops->dellink)
311 ops->dellink = unregister_netdevice_queue;
313 list_add_tail(&ops->list, &link_ops);
316 EXPORT_SYMBOL_GPL(__rtnl_link_register);
319 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
320 * @ops: struct rtnl_link_ops * to register
322 * Returns 0 on success or a negative error code.
324 int rtnl_link_register(struct rtnl_link_ops *ops)
329 err = __rtnl_link_register(ops);
333 EXPORT_SYMBOL_GPL(rtnl_link_register);
335 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
337 struct net_device *dev;
338 LIST_HEAD(list_kill);
340 for_each_netdev(net, dev) {
341 if (dev->rtnl_link_ops == ops)
342 ops->dellink(dev, &list_kill);
344 unregister_netdevice_many(&list_kill);
348 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
349 * @ops: struct rtnl_link_ops * to unregister
351 * The caller must hold the rtnl_mutex.
353 void __rtnl_link_unregister(struct rtnl_link_ops *ops)
358 __rtnl_kill_links(net, ops);
360 list_del(&ops->list);
362 EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
364 /* Return with the rtnl_lock held when there are no network
365 * devices unregistering in any network namespace.
367 static void rtnl_lock_unregistering_all(void)
371 DEFINE_WAIT_FUNC(wait, woken_wake_function);
373 add_wait_queue(&netdev_unregistering_wq, &wait);
375 unregistering = false;
378 if (net->dev_unreg_count > 0) {
379 unregistering = true;
387 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
389 remove_wait_queue(&netdev_unregistering_wq, &wait);
393 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
394 * @ops: struct rtnl_link_ops * to unregister
396 void rtnl_link_unregister(struct rtnl_link_ops *ops)
398 /* Close the race with cleanup_net() */
399 mutex_lock(&net_mutex);
400 rtnl_lock_unregistering_all();
401 __rtnl_link_unregister(ops);
403 mutex_unlock(&net_mutex);
405 EXPORT_SYMBOL_GPL(rtnl_link_unregister);
407 static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
409 struct net_device *master_dev;
410 const struct rtnl_link_ops *ops;
412 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
415 ops = master_dev->rtnl_link_ops;
416 if (!ops || !ops->get_slave_size)
418 /* IFLA_INFO_SLAVE_DATA + nested data */
419 return nla_total_size(sizeof(struct nlattr)) +
420 ops->get_slave_size(master_dev, dev);
423 static size_t rtnl_link_get_size(const struct net_device *dev)
425 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
431 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
432 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
435 /* IFLA_INFO_DATA + nested data */
436 size += nla_total_size(sizeof(struct nlattr)) +
439 if (ops->get_xstats_size)
440 /* IFLA_INFO_XSTATS */
441 size += nla_total_size(ops->get_xstats_size(dev));
443 size += rtnl_link_get_slave_info_data_size(dev);
448 static LIST_HEAD(rtnl_af_ops);
450 static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
452 const struct rtnl_af_ops *ops;
454 list_for_each_entry(ops, &rtnl_af_ops, list) {
455 if (ops->family == family)
463 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
464 * @ops: struct rtnl_af_ops * to register
466 * Returns 0 on success or a negative error code.
468 void rtnl_af_register(struct rtnl_af_ops *ops)
471 list_add_tail(&ops->list, &rtnl_af_ops);
474 EXPORT_SYMBOL_GPL(rtnl_af_register);
477 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
478 * @ops: struct rtnl_af_ops * to unregister
480 * The caller must hold the rtnl_mutex.
482 void __rtnl_af_unregister(struct rtnl_af_ops *ops)
484 list_del(&ops->list);
486 EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
489 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
490 * @ops: struct rtnl_af_ops * to unregister
492 void rtnl_af_unregister(struct rtnl_af_ops *ops)
495 __rtnl_af_unregister(ops);
498 EXPORT_SYMBOL_GPL(rtnl_af_unregister);
500 static size_t rtnl_link_get_af_size(const struct net_device *dev,
503 struct rtnl_af_ops *af_ops;
507 size = nla_total_size(sizeof(struct nlattr));
509 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
510 if (af_ops->get_link_af_size) {
511 /* AF_* + nested data */
512 size += nla_total_size(sizeof(struct nlattr)) +
513 af_ops->get_link_af_size(dev, ext_filter_mask);
520 static bool rtnl_have_link_slave_info(const struct net_device *dev)
522 struct net_device *master_dev;
524 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
525 if (master_dev && master_dev->rtnl_link_ops)
530 static int rtnl_link_slave_info_fill(struct sk_buff *skb,
531 const struct net_device *dev)
533 struct net_device *master_dev;
534 const struct rtnl_link_ops *ops;
535 struct nlattr *slave_data;
538 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
541 ops = master_dev->rtnl_link_ops;
544 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
546 if (ops->fill_slave_info) {
547 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
550 err = ops->fill_slave_info(skb, master_dev, dev);
552 goto err_cancel_slave_data;
553 nla_nest_end(skb, slave_data);
557 err_cancel_slave_data:
558 nla_nest_cancel(skb, slave_data);
562 static int rtnl_link_info_fill(struct sk_buff *skb,
563 const struct net_device *dev)
565 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
571 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
573 if (ops->fill_xstats) {
574 err = ops->fill_xstats(skb, dev);
578 if (ops->fill_info) {
579 data = nla_nest_start(skb, IFLA_INFO_DATA);
582 err = ops->fill_info(skb, dev);
584 goto err_cancel_data;
585 nla_nest_end(skb, data);
590 nla_nest_cancel(skb, data);
594 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
596 struct nlattr *linkinfo;
599 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
600 if (linkinfo == NULL)
603 err = rtnl_link_info_fill(skb, dev);
605 goto err_cancel_link;
607 err = rtnl_link_slave_info_fill(skb, dev);
609 goto err_cancel_link;
611 nla_nest_end(skb, linkinfo);
615 nla_nest_cancel(skb, linkinfo);
620 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
622 struct sock *rtnl = net->rtnl;
625 NETLINK_CB(skb).dst_group = group;
627 atomic_inc(&skb->users);
628 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
630 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
634 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
636 struct sock *rtnl = net->rtnl;
638 return nlmsg_unicast(rtnl, skb, pid);
640 EXPORT_SYMBOL(rtnl_unicast);
642 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
643 struct nlmsghdr *nlh, gfp_t flags)
645 struct sock *rtnl = net->rtnl;
649 report = nlmsg_report(nlh);
651 nlmsg_notify(rtnl, skb, pid, group, report, flags);
653 EXPORT_SYMBOL(rtnl_notify);
655 void rtnl_set_sk_err(struct net *net, u32 group, int error)
657 struct sock *rtnl = net->rtnl;
659 netlink_set_err(rtnl, 0, group, error);
661 EXPORT_SYMBOL(rtnl_set_sk_err);
663 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
668 mx = nla_nest_start(skb, RTA_METRICS);
672 for (i = 0; i < RTAX_MAX; i++) {
674 if (i == RTAX_CC_ALGO - 1) {
675 char tmp[TCP_CA_NAME_MAX], *name;
677 name = tcp_ca_get_name_by_key(metrics[i], tmp);
680 if (nla_put_string(skb, i + 1, name))
681 goto nla_put_failure;
682 } else if (i == RTAX_FEATURES - 1) {
683 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
685 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
686 if (nla_put_u32(skb, i + 1, user_features))
687 goto nla_put_failure;
689 if (nla_put_u32(skb, i + 1, metrics[i]))
690 goto nla_put_failure;
697 nla_nest_cancel(skb, mx);
701 return nla_nest_end(skb, mx);
704 nla_nest_cancel(skb, mx);
707 EXPORT_SYMBOL(rtnetlink_put_metrics);
709 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
710 long expires, u32 error)
712 struct rta_cacheinfo ci = {
713 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
714 .rta_used = dst->__use,
715 .rta_clntref = atomic_read(&(dst->__refcnt)),
723 clock = jiffies_to_clock_t(abs(expires));
724 clock = min_t(unsigned long, clock, INT_MAX);
725 ci.rta_expires = (expires > 0) ? clock : -clock;
727 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
729 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
731 static void set_operstate(struct net_device *dev, unsigned char transition)
733 unsigned char operstate = dev->operstate;
735 switch (transition) {
737 if ((operstate == IF_OPER_DORMANT ||
738 operstate == IF_OPER_UNKNOWN) &&
740 operstate = IF_OPER_UP;
743 case IF_OPER_DORMANT:
744 if (operstate == IF_OPER_UP ||
745 operstate == IF_OPER_UNKNOWN)
746 operstate = IF_OPER_DORMANT;
750 if (dev->operstate != operstate) {
751 write_lock_bh(&dev_base_lock);
752 dev->operstate = operstate;
753 write_unlock_bh(&dev_base_lock);
754 netdev_state_change(dev);
758 static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
760 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
761 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
764 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
765 const struct ifinfomsg *ifm)
767 unsigned int flags = ifm->ifi_flags;
769 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
771 flags = (flags & ifm->ifi_change) |
772 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
777 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
778 const struct rtnl_link_stats64 *b)
780 a->rx_packets = b->rx_packets;
781 a->tx_packets = b->tx_packets;
782 a->rx_bytes = b->rx_bytes;
783 a->tx_bytes = b->tx_bytes;
784 a->rx_errors = b->rx_errors;
785 a->tx_errors = b->tx_errors;
786 a->rx_dropped = b->rx_dropped;
787 a->tx_dropped = b->tx_dropped;
789 a->multicast = b->multicast;
790 a->collisions = b->collisions;
792 a->rx_length_errors = b->rx_length_errors;
793 a->rx_over_errors = b->rx_over_errors;
794 a->rx_crc_errors = b->rx_crc_errors;
795 a->rx_frame_errors = b->rx_frame_errors;
796 a->rx_fifo_errors = b->rx_fifo_errors;
797 a->rx_missed_errors = b->rx_missed_errors;
799 a->tx_aborted_errors = b->tx_aborted_errors;
800 a->tx_carrier_errors = b->tx_carrier_errors;
801 a->tx_fifo_errors = b->tx_fifo_errors;
802 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
803 a->tx_window_errors = b->tx_window_errors;
805 a->rx_compressed = b->rx_compressed;
806 a->tx_compressed = b->tx_compressed;
808 a->rx_nohandler = b->rx_nohandler;
811 static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
813 memcpy(v, b, sizeof(*b));
817 static inline int rtnl_vfinfo_size(const struct net_device *dev,
820 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
821 (ext_filter_mask & RTEXT_FILTER_VF)) {
822 int num_vfs = dev_num_vf(dev->dev.parent);
823 size_t size = nla_total_size(sizeof(struct nlattr));
824 size += nla_total_size(num_vfs * sizeof(struct nlattr));
826 (nla_total_size(sizeof(struct ifla_vf_mac)) +
827 nla_total_size(sizeof(struct ifla_vf_vlan)) +
828 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
829 nla_total_size(sizeof(struct ifla_vf_rate)) +
830 nla_total_size(sizeof(struct ifla_vf_link_state)) +
831 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
832 /* IFLA_VF_STATS_RX_PACKETS */
833 nla_total_size(sizeof(__u64)) +
834 /* IFLA_VF_STATS_TX_PACKETS */
835 nla_total_size(sizeof(__u64)) +
836 /* IFLA_VF_STATS_RX_BYTES */
837 nla_total_size(sizeof(__u64)) +
838 /* IFLA_VF_STATS_TX_BYTES */
839 nla_total_size(sizeof(__u64)) +
840 /* IFLA_VF_STATS_BROADCAST */
841 nla_total_size(sizeof(__u64)) +
842 /* IFLA_VF_STATS_MULTICAST */
843 nla_total_size(sizeof(__u64)) +
844 nla_total_size(sizeof(struct ifla_vf_trust)));
850 static size_t rtnl_port_size(const struct net_device *dev,
853 size_t port_size = nla_total_size(4) /* PORT_VF */
854 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
855 + nla_total_size(sizeof(struct ifla_port_vsi))
857 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
858 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
859 + nla_total_size(1) /* PROT_VDP_REQUEST */
860 + nla_total_size(2); /* PORT_VDP_RESPONSE */
861 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
862 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
864 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
867 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
868 !(ext_filter_mask & RTEXT_FILTER_VF))
870 if (dev_num_vf(dev->dev.parent))
871 return port_self_size + vf_ports_size +
872 vf_port_size * dev_num_vf(dev->dev.parent);
874 return port_self_size;
877 static noinline size_t if_nlmsg_size(const struct net_device *dev,
880 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
881 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
882 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
883 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
884 + nla_total_size(sizeof(struct rtnl_link_ifmap))
885 + nla_total_size(sizeof(struct rtnl_link_stats))
886 + nla_total_size(sizeof(struct rtnl_link_stats64))
887 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
888 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
889 + nla_total_size(4) /* IFLA_TXQLEN */
890 + nla_total_size(4) /* IFLA_WEIGHT */
891 + nla_total_size(4) /* IFLA_MTU */
892 + nla_total_size(4) /* IFLA_LINK */
893 + nla_total_size(4) /* IFLA_MASTER */
894 + nla_total_size(1) /* IFLA_CARRIER */
895 + nla_total_size(4) /* IFLA_PROMISCUITY */
896 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
897 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
898 + nla_total_size(4) /* IFLA_MAX_GSO_SEGS */
899 + nla_total_size(4) /* IFLA_MAX_GSO_SIZE */
900 + nla_total_size(1) /* IFLA_OPERSTATE */
901 + nla_total_size(1) /* IFLA_LINKMODE */
902 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
903 + nla_total_size(4) /* IFLA_LINK_NETNSID */
904 + nla_total_size(ext_filter_mask
905 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
906 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
907 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
908 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
909 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
910 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
911 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
912 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
913 + nla_total_size(1); /* IFLA_PROTO_DOWN */
917 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
919 struct nlattr *vf_ports;
920 struct nlattr *vf_port;
924 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
928 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
929 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
931 goto nla_put_failure;
932 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
933 goto nla_put_failure;
934 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
935 if (err == -EMSGSIZE)
936 goto nla_put_failure;
938 nla_nest_cancel(skb, vf_port);
941 nla_nest_end(skb, vf_port);
944 nla_nest_end(skb, vf_ports);
949 nla_nest_cancel(skb, vf_ports);
953 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
955 struct nlattr *port_self;
958 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
962 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
964 nla_nest_cancel(skb, port_self);
965 return (err == -EMSGSIZE) ? err : 0;
968 nla_nest_end(skb, port_self);
973 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
978 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
979 !(ext_filter_mask & RTEXT_FILTER_VF))
982 err = rtnl_port_self_fill(skb, dev);
986 if (dev_num_vf(dev->dev.parent)) {
987 err = rtnl_vf_ports_fill(skb, dev);
995 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
998 struct netdev_phys_item_id ppid;
1000 err = dev_get_phys_port_id(dev, &ppid);
1002 if (err == -EOPNOTSUPP)
1007 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1013 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1015 char name[IFNAMSIZ];
1018 err = dev_get_phys_port_name(dev, name, sizeof(name));
1020 if (err == -EOPNOTSUPP)
1025 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name))
1031 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1034 struct switchdev_attr attr = {
1036 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
1037 .flags = SWITCHDEV_F_NO_RECURSE,
1040 err = switchdev_port_attr_get(dev, &attr);
1042 if (err == -EOPNOTSUPP)
1047 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1054 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1055 struct net_device *dev)
1057 const struct rtnl_link_stats64 *stats;
1058 struct rtnl_link_stats64 temp;
1059 struct nlattr *attr;
1061 stats = dev_get_stats(dev, &temp);
1063 attr = nla_reserve(skb, IFLA_STATS,
1064 sizeof(struct rtnl_link_stats));
1068 copy_rtnl_link_stats(nla_data(attr), stats);
1070 attr = nla_reserve(skb, IFLA_STATS64,
1071 sizeof(struct rtnl_link_stats64));
1075 copy_rtnl_link_stats64(nla_data(attr), stats);
1080 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1081 struct net_device *dev,
1083 struct nlattr *vfinfo)
1085 struct ifla_vf_rss_query_en vf_rss_query_en;
1086 struct ifla_vf_link_state vf_linkstate;
1087 struct ifla_vf_spoofchk vf_spoofchk;
1088 struct ifla_vf_tx_rate vf_tx_rate;
1089 struct ifla_vf_stats vf_stats;
1090 struct ifla_vf_trust vf_trust;
1091 struct ifla_vf_vlan vf_vlan;
1092 struct ifla_vf_rate vf_rate;
1093 struct nlattr *vf, *vfstats;
1094 struct ifla_vf_mac vf_mac;
1095 struct ifla_vf_info ivi;
1097 /* Not all SR-IOV capable drivers support the
1098 * spoofcheck and "RSS query enable" query. Preset to
1099 * -1 so the user space tool can detect that the driver
1100 * didn't report anything.
1103 ivi.rss_query_en = -1;
1105 memset(ivi.mac, 0, sizeof(ivi.mac));
1106 /* The default value for VF link state is "auto"
1107 * IFLA_VF_LINK_STATE_AUTO which equals zero
1110 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1119 vf_rss_query_en.vf =
1120 vf_trust.vf = ivi.vf;
1122 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1123 vf_vlan.vlan = ivi.vlan;
1124 vf_vlan.qos = ivi.qos;
1125 vf_tx_rate.rate = ivi.max_tx_rate;
1126 vf_rate.min_tx_rate = ivi.min_tx_rate;
1127 vf_rate.max_tx_rate = ivi.max_tx_rate;
1128 vf_spoofchk.setting = ivi.spoofchk;
1129 vf_linkstate.link_state = ivi.linkstate;
1130 vf_rss_query_en.setting = ivi.rss_query_en;
1131 vf_trust.setting = ivi.trusted;
1132 vf = nla_nest_start(skb, IFLA_VF_INFO);
1134 nla_nest_cancel(skb, vfinfo);
1137 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1138 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1139 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1141 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1143 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1145 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1147 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1148 sizeof(vf_rss_query_en),
1149 &vf_rss_query_en) ||
1150 nla_put(skb, IFLA_VF_TRUST,
1151 sizeof(vf_trust), &vf_trust))
1153 memset(&vf_stats, 0, sizeof(vf_stats));
1154 if (dev->netdev_ops->ndo_get_vf_stats)
1155 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1157 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
1159 nla_nest_cancel(skb, vf);
1160 nla_nest_cancel(skb, vfinfo);
1163 if (nla_put_u64(skb, IFLA_VF_STATS_RX_PACKETS,
1164 vf_stats.rx_packets) ||
1165 nla_put_u64(skb, IFLA_VF_STATS_TX_PACKETS,
1166 vf_stats.tx_packets) ||
1167 nla_put_u64(skb, IFLA_VF_STATS_RX_BYTES,
1168 vf_stats.rx_bytes) ||
1169 nla_put_u64(skb, IFLA_VF_STATS_TX_BYTES,
1170 vf_stats.tx_bytes) ||
1171 nla_put_u64(skb, IFLA_VF_STATS_BROADCAST,
1172 vf_stats.broadcast) ||
1173 nla_put_u64(skb, IFLA_VF_STATS_MULTICAST,
1174 vf_stats.multicast))
1176 nla_nest_end(skb, vfstats);
1177 nla_nest_end(skb, vf);
1181 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1183 struct rtnl_link_ifmap map = {
1184 .mem_start = dev->mem_start,
1185 .mem_end = dev->mem_end,
1186 .base_addr = dev->base_addr,
1189 .port = dev->if_port,
1191 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
1197 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
1198 int type, u32 pid, u32 seq, u32 change,
1199 unsigned int flags, u32 ext_filter_mask)
1201 struct ifinfomsg *ifm;
1202 struct nlmsghdr *nlh;
1203 struct nlattr *af_spec;
1204 struct rtnl_af_ops *af_ops;
1205 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1208 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1212 ifm = nlmsg_data(nlh);
1213 ifm->ifi_family = AF_UNSPEC;
1215 ifm->ifi_type = dev->type;
1216 ifm->ifi_index = dev->ifindex;
1217 ifm->ifi_flags = dev_get_flags(dev);
1218 ifm->ifi_change = change;
1220 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1221 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1222 nla_put_u8(skb, IFLA_OPERSTATE,
1223 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1224 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1225 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1226 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1227 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
1228 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1229 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1230 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1232 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1234 (dev->ifindex != dev_get_iflink(dev) &&
1235 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
1237 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
1238 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1240 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1242 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1243 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1244 atomic_read(&dev->carrier_changes)) ||
1245 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
1246 goto nla_put_failure;
1248 if (rtnl_fill_link_ifmap(skb, dev))
1249 goto nla_put_failure;
1251 if (dev->addr_len) {
1252 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1253 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1254 goto nla_put_failure;
1257 if (rtnl_phys_port_id_fill(skb, dev))
1258 goto nla_put_failure;
1260 if (rtnl_phys_port_name_fill(skb, dev))
1261 goto nla_put_failure;
1263 if (rtnl_phys_switch_id_fill(skb, dev))
1264 goto nla_put_failure;
1266 if (rtnl_fill_stats(skb, dev))
1267 goto nla_put_failure;
1269 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1270 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1271 goto nla_put_failure;
1273 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
1274 ext_filter_mask & RTEXT_FILTER_VF) {
1276 struct nlattr *vfinfo;
1277 int num_vfs = dev_num_vf(dev->dev.parent);
1279 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1281 goto nla_put_failure;
1282 for (i = 0; i < num_vfs; i++) {
1283 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1284 goto nla_put_failure;
1287 nla_nest_end(skb, vfinfo);
1290 if (rtnl_port_fill(skb, dev, ext_filter_mask))
1291 goto nla_put_failure;
1293 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1294 if (rtnl_link_fill(skb, dev) < 0)
1295 goto nla_put_failure;
1298 if (dev->rtnl_link_ops &&
1299 dev->rtnl_link_ops->get_link_net) {
1300 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1302 if (!net_eq(dev_net(dev), link_net)) {
1303 int id = peernet2id_alloc(dev_net(dev), link_net);
1305 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1306 goto nla_put_failure;
1310 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1311 goto nla_put_failure;
1313 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1314 if (af_ops->fill_link_af) {
1318 if (!(af = nla_nest_start(skb, af_ops->family)))
1319 goto nla_put_failure;
1321 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1324 * Caller may return ENODATA to indicate that there
1325 * was no data to be dumped. This is not an error, it
1326 * means we should trim the attribute header and
1329 if (err == -ENODATA)
1330 nla_nest_cancel(skb, af);
1332 goto nla_put_failure;
1334 nla_nest_end(skb, af);
1338 nla_nest_end(skb, af_spec);
1340 nlmsg_end(skb, nlh);
1344 nlmsg_cancel(skb, nlh);
1348 static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1349 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1350 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1351 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1352 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1353 [IFLA_MTU] = { .type = NLA_U32 },
1354 [IFLA_LINK] = { .type = NLA_U32 },
1355 [IFLA_MASTER] = { .type = NLA_U32 },
1356 [IFLA_CARRIER] = { .type = NLA_U8 },
1357 [IFLA_TXQLEN] = { .type = NLA_U32 },
1358 [IFLA_WEIGHT] = { .type = NLA_U32 },
1359 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1360 [IFLA_LINKMODE] = { .type = NLA_U8 },
1361 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1362 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1363 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1364 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1365 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1366 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1367 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1368 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1369 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1370 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1371 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1372 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1373 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1374 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
1375 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1376 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
1377 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
1380 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1381 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1382 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1383 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1384 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
1387 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1388 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1389 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1390 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1391 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1392 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1393 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
1394 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
1395 [IFLA_VF_STATS] = { .type = NLA_NESTED },
1396 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
1397 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1398 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1401 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1402 [IFLA_PORT_VF] = { .type = NLA_U32 },
1403 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1404 .len = PORT_PROFILE_MAX },
1405 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1406 .len = sizeof(struct ifla_port_vsi)},
1407 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1408 .len = PORT_UUID_MAX },
1409 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1410 .len = PORT_UUID_MAX },
1411 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1412 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1415 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1417 const struct rtnl_link_ops *ops = NULL;
1418 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1420 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, ifla_info_policy) < 0)
1423 if (linfo[IFLA_INFO_KIND]) {
1424 char kind[MODULE_NAME_LEN];
1426 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1427 ops = rtnl_link_ops_get(kind);
1433 static bool link_master_filtered(struct net_device *dev, int master_idx)
1435 struct net_device *master;
1440 master = netdev_master_upper_dev_get(dev);
1441 if (!master || master->ifindex != master_idx)
1447 static bool link_kind_filtered(const struct net_device *dev,
1448 const struct rtnl_link_ops *kind_ops)
1450 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1456 static bool link_dump_filtered(struct net_device *dev,
1458 const struct rtnl_link_ops *kind_ops)
1460 if (link_master_filtered(dev, master_idx) ||
1461 link_kind_filtered(dev, kind_ops))
1467 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1469 struct net *net = sock_net(skb->sk);
1472 struct net_device *dev;
1473 struct hlist_head *head;
1474 struct nlattr *tb[IFLA_MAX+1];
1475 u32 ext_filter_mask = 0;
1476 const struct rtnl_link_ops *kind_ops = NULL;
1477 unsigned int flags = NLM_F_MULTI;
1483 s_idx = cb->args[1];
1485 cb->seq = net->dev_base_seq;
1487 /* A hack to preserve kernel<->userspace interface.
1488 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1489 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1490 * what iproute2 < v3.9.0 used.
1491 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1492 * attribute, its netlink message is shorter than struct ifinfomsg.
1494 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1495 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1497 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
1499 if (tb[IFLA_EXT_MASK])
1500 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1502 if (tb[IFLA_MASTER])
1503 master_idx = nla_get_u32(tb[IFLA_MASTER]);
1505 if (tb[IFLA_LINKINFO])
1506 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
1508 if (master_idx || kind_ops)
1509 flags |= NLM_F_DUMP_FILTERED;
1512 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1514 head = &net->dev_index_head[h];
1515 hlist_for_each_entry(dev, head, index_hlist) {
1516 if (link_dump_filtered(dev, master_idx, kind_ops))
1520 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1521 NETLINK_CB(cb->skb).portid,
1522 cb->nlh->nlmsg_seq, 0,
1525 /* If we ran out of room on the first message,
1528 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1533 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1545 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1547 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1549 EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1551 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1554 /* Examine the link attributes and figure out which
1555 * network namespace we are talking about.
1557 if (tb[IFLA_NET_NS_PID])
1558 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1559 else if (tb[IFLA_NET_NS_FD])
1560 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1562 net = get_net(src_net);
1565 EXPORT_SYMBOL(rtnl_link_get_net);
1567 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1570 if (tb[IFLA_ADDRESS] &&
1571 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1574 if (tb[IFLA_BROADCAST] &&
1575 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1579 if (tb[IFLA_AF_SPEC]) {
1583 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1584 const struct rtnl_af_ops *af_ops;
1586 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1587 return -EAFNOSUPPORT;
1589 if (!af_ops->set_link_af)
1592 if (af_ops->validate_link_af) {
1593 err = af_ops->validate_link_af(dev, af);
1603 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
1606 const struct net_device_ops *ops = dev->netdev_ops;
1608 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
1611 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
1613 if (dev->type != ARPHRD_INFINIBAND)
1616 return handle_infiniband_guid(dev, ivt, guid_type);
1619 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
1621 const struct net_device_ops *ops = dev->netdev_ops;
1624 if (tb[IFLA_VF_MAC]) {
1625 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
1628 if (ops->ndo_set_vf_mac)
1629 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1635 if (tb[IFLA_VF_VLAN]) {
1636 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1639 if (ops->ndo_set_vf_vlan)
1640 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
1646 if (tb[IFLA_VF_TX_RATE]) {
1647 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1648 struct ifla_vf_info ivf;
1651 if (ops->ndo_get_vf_config)
1652 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1657 if (ops->ndo_set_vf_rate)
1658 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1665 if (tb[IFLA_VF_RATE]) {
1666 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1669 if (ops->ndo_set_vf_rate)
1670 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1677 if (tb[IFLA_VF_SPOOFCHK]) {
1678 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1681 if (ops->ndo_set_vf_spoofchk)
1682 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1688 if (tb[IFLA_VF_LINK_STATE]) {
1689 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1692 if (ops->ndo_set_vf_link_state)
1693 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1699 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1700 struct ifla_vf_rss_query_en *ivrssq_en;
1703 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1704 if (ops->ndo_set_vf_rss_query_en)
1705 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1706 ivrssq_en->setting);
1711 if (tb[IFLA_VF_TRUST]) {
1712 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1715 if (ops->ndo_set_vf_trust)
1716 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1721 if (tb[IFLA_VF_IB_NODE_GUID]) {
1722 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
1724 if (!ops->ndo_set_vf_guid)
1727 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
1730 if (tb[IFLA_VF_IB_PORT_GUID]) {
1731 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
1733 if (!ops->ndo_set_vf_guid)
1736 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
1742 static int do_set_master(struct net_device *dev, int ifindex)
1744 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1745 const struct net_device_ops *ops;
1749 if (upper_dev->ifindex == ifindex)
1751 ops = upper_dev->netdev_ops;
1752 if (ops->ndo_del_slave) {
1753 err = ops->ndo_del_slave(upper_dev, dev);
1762 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1765 ops = upper_dev->netdev_ops;
1766 if (ops->ndo_add_slave) {
1767 err = ops->ndo_add_slave(upper_dev, dev);
1777 #define DO_SETLINK_MODIFIED 0x01
1778 /* notify flag means notify + modified. */
1779 #define DO_SETLINK_NOTIFY 0x03
1780 static int do_setlink(const struct sk_buff *skb,
1781 struct net_device *dev, struct ifinfomsg *ifm,
1782 struct nlattr **tb, char *ifname, int status)
1784 const struct net_device_ops *ops = dev->netdev_ops;
1787 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
1788 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1793 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
1798 err = dev_change_net_namespace(dev, net, ifname);
1802 status |= DO_SETLINK_MODIFIED;
1806 struct rtnl_link_ifmap *u_map;
1809 if (!ops->ndo_set_config) {
1814 if (!netif_device_present(dev)) {
1819 u_map = nla_data(tb[IFLA_MAP]);
1820 k_map.mem_start = (unsigned long) u_map->mem_start;
1821 k_map.mem_end = (unsigned long) u_map->mem_end;
1822 k_map.base_addr = (unsigned short) u_map->base_addr;
1823 k_map.irq = (unsigned char) u_map->irq;
1824 k_map.dma = (unsigned char) u_map->dma;
1825 k_map.port = (unsigned char) u_map->port;
1827 err = ops->ndo_set_config(dev, &k_map);
1831 status |= DO_SETLINK_NOTIFY;
1834 if (tb[IFLA_ADDRESS]) {
1835 struct sockaddr *sa;
1838 len = sizeof(sa_family_t) + dev->addr_len;
1839 sa = kmalloc(len, GFP_KERNEL);
1844 sa->sa_family = dev->type;
1845 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1847 err = dev_set_mac_address(dev, sa);
1851 status |= DO_SETLINK_MODIFIED;
1855 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1858 status |= DO_SETLINK_MODIFIED;
1861 if (tb[IFLA_GROUP]) {
1862 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1863 status |= DO_SETLINK_NOTIFY;
1867 * Interface selected by interface index but interface
1868 * name provided implies that a name change has been
1871 if (ifm->ifi_index > 0 && ifname[0]) {
1872 err = dev_change_name(dev, ifname);
1875 status |= DO_SETLINK_MODIFIED;
1878 if (tb[IFLA_IFALIAS]) {
1879 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1880 nla_len(tb[IFLA_IFALIAS]));
1883 status |= DO_SETLINK_NOTIFY;
1886 if (tb[IFLA_BROADCAST]) {
1887 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1888 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1891 if (ifm->ifi_flags || ifm->ifi_change) {
1892 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1897 if (tb[IFLA_MASTER]) {
1898 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1901 status |= DO_SETLINK_MODIFIED;
1904 if (tb[IFLA_CARRIER]) {
1905 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1908 status |= DO_SETLINK_MODIFIED;
1911 if (tb[IFLA_TXQLEN]) {
1912 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
1914 if (dev->tx_queue_len ^ value)
1915 status |= DO_SETLINK_NOTIFY;
1917 dev->tx_queue_len = value;
1920 if (tb[IFLA_OPERSTATE])
1921 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1923 if (tb[IFLA_LINKMODE]) {
1924 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
1926 write_lock_bh(&dev_base_lock);
1927 if (dev->link_mode ^ value)
1928 status |= DO_SETLINK_NOTIFY;
1929 dev->link_mode = value;
1930 write_unlock_bh(&dev_base_lock);
1933 if (tb[IFLA_VFINFO_LIST]) {
1934 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
1935 struct nlattr *attr;
1938 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
1939 if (nla_type(attr) != IFLA_VF_INFO ||
1940 nla_len(attr) < NLA_HDRLEN) {
1944 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
1948 err = do_setvfinfo(dev, vfinfo);
1951 status |= DO_SETLINK_NOTIFY;
1956 if (tb[IFLA_VF_PORTS]) {
1957 struct nlattr *port[IFLA_PORT_MAX+1];
1958 struct nlattr *attr;
1963 if (!ops->ndo_set_vf_port)
1966 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1967 if (nla_type(attr) != IFLA_VF_PORT ||
1968 nla_len(attr) < NLA_HDRLEN) {
1972 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
1976 if (!port[IFLA_PORT_VF]) {
1980 vf = nla_get_u32(port[IFLA_PORT_VF]);
1981 err = ops->ndo_set_vf_port(dev, vf, port);
1984 status |= DO_SETLINK_NOTIFY;
1989 if (tb[IFLA_PORT_SELF]) {
1990 struct nlattr *port[IFLA_PORT_MAX+1];
1992 err = nla_parse_nested(port, IFLA_PORT_MAX,
1993 tb[IFLA_PORT_SELF], ifla_port_policy);
1998 if (ops->ndo_set_vf_port)
1999 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2002 status |= DO_SETLINK_NOTIFY;
2005 if (tb[IFLA_AF_SPEC]) {
2009 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2010 const struct rtnl_af_ops *af_ops;
2012 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
2015 err = af_ops->set_link_af(dev, af);
2019 status |= DO_SETLINK_NOTIFY;
2024 if (tb[IFLA_PROTO_DOWN]) {
2025 err = dev_change_proto_down(dev,
2026 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2029 status |= DO_SETLINK_NOTIFY;
2033 if (status & DO_SETLINK_MODIFIED) {
2034 if (status & DO_SETLINK_NOTIFY)
2035 netdev_state_change(dev);
2038 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",
2045 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2047 struct net *net = sock_net(skb->sk);
2048 struct ifinfomsg *ifm;
2049 struct net_device *dev;
2051 struct nlattr *tb[IFLA_MAX+1];
2052 char ifname[IFNAMSIZ];
2054 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2058 if (tb[IFLA_IFNAME])
2059 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2064 ifm = nlmsg_data(nlh);
2065 if (ifm->ifi_index > 0)
2066 dev = __dev_get_by_index(net, ifm->ifi_index);
2067 else if (tb[IFLA_IFNAME])
2068 dev = __dev_get_by_name(net, ifname);
2077 err = validate_linkmsg(dev, tb);
2081 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
2086 static int rtnl_group_dellink(const struct net *net, int group)
2088 struct net_device *dev, *aux;
2089 LIST_HEAD(list_kill);
2095 for_each_netdev(net, dev) {
2096 if (dev->group == group) {
2097 const struct rtnl_link_ops *ops;
2100 ops = dev->rtnl_link_ops;
2101 if (!ops || !ops->dellink)
2109 for_each_netdev_safe(net, dev, aux) {
2110 if (dev->group == group) {
2111 const struct rtnl_link_ops *ops;
2113 ops = dev->rtnl_link_ops;
2114 ops->dellink(dev, &list_kill);
2117 unregister_netdevice_many(&list_kill);
2122 int rtnl_delete_link(struct net_device *dev)
2124 const struct rtnl_link_ops *ops;
2125 LIST_HEAD(list_kill);
2127 ops = dev->rtnl_link_ops;
2128 if (!ops || !ops->dellink)
2131 ops->dellink(dev, &list_kill);
2132 unregister_netdevice_many(&list_kill);
2136 EXPORT_SYMBOL_GPL(rtnl_delete_link);
2138 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
2140 struct net *net = sock_net(skb->sk);
2141 struct net_device *dev;
2142 struct ifinfomsg *ifm;
2143 char ifname[IFNAMSIZ];
2144 struct nlattr *tb[IFLA_MAX+1];
2147 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2151 if (tb[IFLA_IFNAME])
2152 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2154 ifm = nlmsg_data(nlh);
2155 if (ifm->ifi_index > 0)
2156 dev = __dev_get_by_index(net, ifm->ifi_index);
2157 else if (tb[IFLA_IFNAME])
2158 dev = __dev_get_by_name(net, ifname);
2159 else if (tb[IFLA_GROUP])
2160 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
2167 return rtnl_delete_link(dev);
2170 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2172 unsigned int old_flags;
2175 old_flags = dev->flags;
2176 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2177 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2182 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
2184 __dev_notify_flags(dev, old_flags, ~0U);
2187 EXPORT_SYMBOL(rtnl_configure_link);
2189 struct net_device *rtnl_create_link(struct net *net,
2190 const char *ifname, unsigned char name_assign_type,
2191 const struct rtnl_link_ops *ops, struct nlattr *tb[])
2194 struct net_device *dev;
2195 unsigned int num_tx_queues = 1;
2196 unsigned int num_rx_queues = 1;
2198 if (tb[IFLA_NUM_TX_QUEUES])
2199 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2200 else if (ops->get_num_tx_queues)
2201 num_tx_queues = ops->get_num_tx_queues();
2203 if (tb[IFLA_NUM_RX_QUEUES])
2204 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2205 else if (ops->get_num_rx_queues)
2206 num_rx_queues = ops->get_num_rx_queues();
2209 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
2210 ops->setup, num_tx_queues, num_rx_queues);
2214 dev_net_set(dev, net);
2215 dev->rtnl_link_ops = ops;
2216 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
2219 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2220 if (tb[IFLA_ADDRESS]) {
2221 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2222 nla_len(tb[IFLA_ADDRESS]));
2223 dev->addr_assign_type = NET_ADDR_SET;
2225 if (tb[IFLA_BROADCAST])
2226 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2227 nla_len(tb[IFLA_BROADCAST]));
2228 if (tb[IFLA_TXQLEN])
2229 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2230 if (tb[IFLA_OPERSTATE])
2231 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2232 if (tb[IFLA_LINKMODE])
2233 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
2235 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2240 return ERR_PTR(err);
2242 EXPORT_SYMBOL(rtnl_create_link);
2244 static int rtnl_group_changelink(const struct sk_buff *skb,
2245 struct net *net, int group,
2246 struct ifinfomsg *ifm,
2249 struct net_device *dev, *aux;
2252 for_each_netdev_safe(net, dev, aux) {
2253 if (dev->group == group) {
2254 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
2263 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2265 struct net *net = sock_net(skb->sk);
2266 const struct rtnl_link_ops *ops;
2267 const struct rtnl_link_ops *m_ops = NULL;
2268 struct net_device *dev;
2269 struct net_device *master_dev = NULL;
2270 struct ifinfomsg *ifm;
2271 char kind[MODULE_NAME_LEN];
2272 char ifname[IFNAMSIZ];
2273 struct nlattr *tb[IFLA_MAX+1];
2274 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
2275 unsigned char name_assign_type = NET_NAME_USER;
2278 #ifdef CONFIG_MODULES
2281 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2285 if (tb[IFLA_IFNAME])
2286 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2290 ifm = nlmsg_data(nlh);
2291 if (ifm->ifi_index > 0)
2292 dev = __dev_get_by_index(net, ifm->ifi_index);
2295 dev = __dev_get_by_name(net, ifname);
2301 master_dev = netdev_master_upper_dev_get(dev);
2303 m_ops = master_dev->rtnl_link_ops;
2306 err = validate_linkmsg(dev, tb);
2310 if (tb[IFLA_LINKINFO]) {
2311 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2312 tb[IFLA_LINKINFO], ifla_info_policy);
2316 memset(linkinfo, 0, sizeof(linkinfo));
2318 if (linkinfo[IFLA_INFO_KIND]) {
2319 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2320 ops = rtnl_link_ops_get(kind);
2327 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2328 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
2329 struct nlattr **data = NULL;
2330 struct nlattr **slave_data = NULL;
2331 struct net *dest_net, *link_net = NULL;
2334 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2335 err = nla_parse_nested(attr, ops->maxtype,
2336 linkinfo[IFLA_INFO_DATA],
2342 if (ops->validate) {
2343 err = ops->validate(tb, data);
2350 if (m_ops->slave_maxtype &&
2351 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2352 err = nla_parse_nested(slave_attr,
2353 m_ops->slave_maxtype,
2354 linkinfo[IFLA_INFO_SLAVE_DATA],
2355 m_ops->slave_policy);
2358 slave_data = slave_attr;
2360 if (m_ops->slave_validate) {
2361 err = m_ops->slave_validate(tb, slave_data);
2370 if (nlh->nlmsg_flags & NLM_F_EXCL)
2372 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2375 if (linkinfo[IFLA_INFO_DATA]) {
2376 if (!ops || ops != dev->rtnl_link_ops ||
2380 err = ops->changelink(dev, tb, data);
2383 status |= DO_SETLINK_NOTIFY;
2386 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2387 if (!m_ops || !m_ops->slave_changelink)
2390 err = m_ops->slave_changelink(master_dev, dev,
2394 status |= DO_SETLINK_NOTIFY;
2397 return do_setlink(skb, dev, ifm, tb, ifname, status);
2400 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2401 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
2402 return rtnl_group_changelink(skb, net,
2403 nla_get_u32(tb[IFLA_GROUP]),
2408 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
2412 #ifdef CONFIG_MODULES
2415 request_module("rtnl-link-%s", kind);
2417 ops = rtnl_link_ops_get(kind);
2429 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
2430 name_assign_type = NET_NAME_ENUM;
2433 dest_net = rtnl_link_get_net(net, tb);
2434 if (IS_ERR(dest_net))
2435 return PTR_ERR(dest_net);
2438 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2441 if (tb[IFLA_LINK_NETNSID]) {
2442 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2444 link_net = get_net_ns_by_id(dest_net, id);
2450 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2454 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2455 name_assign_type, ops, tb);
2461 dev->ifindex = ifm->ifi_index;
2464 err = ops->newlink(link_net ? : net, dev, tb, data);
2465 /* Drivers should call free_netdev() in ->destructor
2466 * and unregister it on failure after registration
2467 * so that device could be finally freed in rtnl_unlock.
2470 /* If device is not registered at all, free it now */
2471 if (dev->reg_state == NETREG_UNINITIALIZED)
2476 err = register_netdevice(dev);
2482 err = rtnl_configure_link(dev, ifm);
2484 goto out_unregister;
2486 err = dev_change_net_namespace(dev, dest_net, ifname);
2488 goto out_unregister;
2497 LIST_HEAD(list_kill);
2499 ops->dellink(dev, &list_kill);
2500 unregister_netdevice_many(&list_kill);
2502 unregister_netdevice(dev);
2508 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
2510 struct net *net = sock_net(skb->sk);
2511 struct ifinfomsg *ifm;
2512 char ifname[IFNAMSIZ];
2513 struct nlattr *tb[IFLA_MAX+1];
2514 struct net_device *dev = NULL;
2515 struct sk_buff *nskb;
2517 u32 ext_filter_mask = 0;
2519 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2523 if (tb[IFLA_IFNAME])
2524 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2526 if (tb[IFLA_EXT_MASK])
2527 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2529 ifm = nlmsg_data(nlh);
2530 if (ifm->ifi_index > 0)
2531 dev = __dev_get_by_index(net, ifm->ifi_index);
2532 else if (tb[IFLA_IFNAME])
2533 dev = __dev_get_by_name(net, ifname);
2540 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
2544 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
2545 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
2547 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2548 WARN_ON(err == -EMSGSIZE);
2551 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
2556 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
2558 struct net *net = sock_net(skb->sk);
2559 struct net_device *dev;
2560 struct nlattr *tb[IFLA_MAX+1];
2561 u32 ext_filter_mask = 0;
2562 u16 min_ifinfo_dump_size = 0;
2565 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2566 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2567 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2569 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
2570 if (tb[IFLA_EXT_MASK])
2571 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2574 if (!ext_filter_mask)
2575 return NLMSG_GOODSIZE;
2577 * traverse the list of net devices and compute the minimum
2578 * buffer size based upon the filter mask.
2580 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2581 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2586 return min_ifinfo_dump_size;
2589 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
2592 int s_idx = cb->family;
2596 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
2597 int type = cb->nlh->nlmsg_type-RTM_BASE;
2598 if (idx < s_idx || idx == PF_PACKET)
2600 if (rtnl_msg_handlers[idx] == NULL ||
2601 rtnl_msg_handlers[idx][type].dumpit == NULL)
2604 memset(&cb->args[0], 0, sizeof(cb->args));
2608 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
2616 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
2617 unsigned int change, gfp_t flags)
2619 struct net *net = dev_net(dev);
2620 struct sk_buff *skb;
2622 size_t if_info_size;
2624 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
2628 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
2630 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2631 WARN_ON(err == -EMSGSIZE);
2638 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2642 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2644 struct net *net = dev_net(dev);
2646 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2649 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2652 struct sk_buff *skb;
2654 if (dev->reg_state != NETREG_REGISTERED)
2657 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
2659 rtmsg_ifinfo_send(skb, dev, flags);
2661 EXPORT_SYMBOL(rtmsg_ifinfo);
2663 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2664 struct net_device *dev,
2665 u8 *addr, u16 vid, u32 pid, u32 seq,
2666 int type, unsigned int flags,
2667 int nlflags, u16 ndm_state)
2669 struct nlmsghdr *nlh;
2672 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
2676 ndm = nlmsg_data(nlh);
2677 ndm->ndm_family = AF_BRIDGE;
2680 ndm->ndm_flags = flags;
2682 ndm->ndm_ifindex = dev->ifindex;
2683 ndm->ndm_state = ndm_state;
2685 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2686 goto nla_put_failure;
2688 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2689 goto nla_put_failure;
2691 nlmsg_end(skb, nlh);
2695 nlmsg_cancel(skb, nlh);
2699 static inline size_t rtnl_fdb_nlmsg_size(void)
2701 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2704 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
2707 struct net *net = dev_net(dev);
2708 struct sk_buff *skb;
2711 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2715 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
2716 0, 0, type, NTF_SELF, 0, ndm_state);
2722 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2725 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2729 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2731 int ndo_dflt_fdb_add(struct ndmsg *ndm,
2732 struct nlattr *tb[],
2733 struct net_device *dev,
2734 const unsigned char *addr, u16 vid,
2739 /* If aging addresses are supported device will need to
2740 * implement its own handler for this.
2742 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2743 pr_info("%s: FDB only supports static addresses\n", dev->name);
2748 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2752 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2753 err = dev_uc_add_excl(dev, addr);
2754 else if (is_multicast_ether_addr(addr))
2755 err = dev_mc_add_excl(dev, addr);
2757 /* Only return duplicate errors if NLM_F_EXCL is set */
2758 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2763 EXPORT_SYMBOL(ndo_dflt_fdb_add);
2765 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2770 if (nla_len(vlan_attr) != sizeof(u16)) {
2771 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2775 vid = nla_get_u16(vlan_attr);
2777 if (!vid || vid >= VLAN_VID_MASK) {
2778 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2787 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
2789 struct net *net = sock_net(skb->sk);
2791 struct nlattr *tb[NDA_MAX+1];
2792 struct net_device *dev;
2797 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2801 ndm = nlmsg_data(nlh);
2802 if (ndm->ndm_ifindex == 0) {
2803 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2807 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2809 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2813 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2814 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2818 addr = nla_data(tb[NDA_LLADDR]);
2820 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2826 /* Support fdb on master device the net/bridge default case */
2827 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2828 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2829 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2830 const struct net_device_ops *ops = br_dev->netdev_ops;
2832 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
2837 ndm->ndm_flags &= ~NTF_MASTER;
2840 /* Embedded bridge, macvlan, and any other device support */
2841 if ((ndm->ndm_flags & NTF_SELF)) {
2842 if (dev->netdev_ops->ndo_fdb_add)
2843 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
2847 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
2851 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
2853 ndm->ndm_flags &= ~NTF_SELF;
2861 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2863 int ndo_dflt_fdb_del(struct ndmsg *ndm,
2864 struct nlattr *tb[],
2865 struct net_device *dev,
2866 const unsigned char *addr, u16 vid)
2870 /* If aging addresses are supported device will need to
2871 * implement its own handler for this.
2873 if (!(ndm->ndm_state & NUD_PERMANENT)) {
2874 pr_info("%s: FDB only supports static addresses\n", dev->name);
2878 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2879 err = dev_uc_del(dev, addr);
2880 else if (is_multicast_ether_addr(addr))
2881 err = dev_mc_del(dev, addr);
2885 EXPORT_SYMBOL(ndo_dflt_fdb_del);
2887 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
2889 struct net *net = sock_net(skb->sk);
2891 struct nlattr *tb[NDA_MAX+1];
2892 struct net_device *dev;
2897 if (!netlink_capable(skb, CAP_NET_ADMIN))
2900 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2904 ndm = nlmsg_data(nlh);
2905 if (ndm->ndm_ifindex == 0) {
2906 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2910 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2912 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2916 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2917 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2921 addr = nla_data(tb[NDA_LLADDR]);
2923 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2929 /* Support fdb on master device the net/bridge default case */
2930 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2931 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2932 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2933 const struct net_device_ops *ops = br_dev->netdev_ops;
2935 if (ops->ndo_fdb_del)
2936 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
2941 ndm->ndm_flags &= ~NTF_MASTER;
2944 /* Embedded bridge, macvlan, and any other device support */
2945 if (ndm->ndm_flags & NTF_SELF) {
2946 if (dev->netdev_ops->ndo_fdb_del)
2947 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
2950 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
2953 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
2955 ndm->ndm_flags &= ~NTF_SELF;
2962 static int nlmsg_populate_fdb(struct sk_buff *skb,
2963 struct netlink_callback *cb,
2964 struct net_device *dev,
2966 struct netdev_hw_addr_list *list)
2968 struct netdev_hw_addr *ha;
2972 portid = NETLINK_CB(cb->skb).portid;
2973 seq = cb->nlh->nlmsg_seq;
2975 list_for_each_entry(ha, &list->list, list) {
2976 if (*idx < cb->args[0])
2979 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
2981 RTM_NEWNEIGH, NTF_SELF,
2982 NLM_F_MULTI, NUD_PERMANENT);
2992 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
2993 * @nlh: netlink message header
2996 * Default netdevice operation to dump the existing unicast address list.
2997 * Returns number of addresses from list put in skb.
2999 int ndo_dflt_fdb_dump(struct sk_buff *skb,
3000 struct netlink_callback *cb,
3001 struct net_device *dev,
3002 struct net_device *filter_dev,
3007 netif_addr_lock_bh(dev);
3008 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
3011 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
3013 netif_addr_unlock_bh(dev);
3017 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3019 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3021 struct net_device *dev;
3022 struct nlattr *tb[IFLA_MAX+1];
3023 struct net_device *br_dev = NULL;
3024 const struct net_device_ops *ops = NULL;
3025 const struct net_device_ops *cops = NULL;
3026 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3027 struct net *net = sock_net(skb->sk);
3032 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
3033 ifla_policy) == 0) {
3034 if (tb[IFLA_MASTER])
3035 br_idx = nla_get_u32(tb[IFLA_MASTER]);
3038 brport_idx = ifm->ifi_index;
3041 br_dev = __dev_get_by_index(net, br_idx);
3045 ops = br_dev->netdev_ops;
3049 for_each_netdev(net, dev) {
3050 if (brport_idx && (dev->ifindex != brport_idx))
3053 if (!br_idx) { /* user did not specify a specific bridge */
3054 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3055 br_dev = netdev_master_upper_dev_get(dev);
3056 cops = br_dev->netdev_ops;
3060 if (dev != br_dev &&
3061 !(dev->priv_flags & IFF_BRIDGE_PORT))
3064 if (br_dev != netdev_master_upper_dev_get(dev) &&
3065 !(dev->priv_flags & IFF_EBRIDGE))
3071 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3072 if (cops && cops->ndo_fdb_dump)
3073 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev,
3076 if (cb->args[1] == -EMSGSIZE)
3079 if (dev->netdev_ops->ndo_fdb_dump)
3080 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL,
3083 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx);
3084 if (cb->args[1] == -EMSGSIZE)
3094 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3095 unsigned int attrnum, unsigned int flag)
3098 return nla_put_u8(skb, attrnum, !!(flags & flag));
3102 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
3103 struct net_device *dev, u16 mode,
3104 u32 flags, u32 mask, int nlflags,
3106 int (*vlan_fill)(struct sk_buff *skb,
3107 struct net_device *dev,
3110 struct nlmsghdr *nlh;
3111 struct ifinfomsg *ifm;
3112 struct nlattr *br_afspec;
3113 struct nlattr *protinfo;
3114 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
3115 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3118 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
3122 ifm = nlmsg_data(nlh);
3123 ifm->ifi_family = AF_BRIDGE;
3125 ifm->ifi_type = dev->type;
3126 ifm->ifi_index = dev->ifindex;
3127 ifm->ifi_flags = dev_get_flags(dev);
3128 ifm->ifi_change = 0;
3131 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3132 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3133 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
3135 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
3137 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
3138 (dev->ifindex != dev_get_iflink(dev) &&
3139 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
3140 goto nla_put_failure;
3142 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3144 goto nla_put_failure;
3146 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
3147 nla_nest_cancel(skb, br_afspec);
3148 goto nla_put_failure;
3151 if (mode != BRIDGE_MODE_UNDEF) {
3152 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3153 nla_nest_cancel(skb, br_afspec);
3154 goto nla_put_failure;
3158 err = vlan_fill(skb, dev, filter_mask);
3160 nla_nest_cancel(skb, br_afspec);
3161 goto nla_put_failure;
3164 nla_nest_end(skb, br_afspec);
3166 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3168 goto nla_put_failure;
3170 if (brport_nla_put_flag(skb, flags, mask,
3171 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3172 brport_nla_put_flag(skb, flags, mask,
3173 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3174 brport_nla_put_flag(skb, flags, mask,
3175 IFLA_BRPORT_FAST_LEAVE,
3176 BR_MULTICAST_FAST_LEAVE) ||
3177 brport_nla_put_flag(skb, flags, mask,
3178 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3179 brport_nla_put_flag(skb, flags, mask,
3180 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3181 brport_nla_put_flag(skb, flags, mask,
3182 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3183 brport_nla_put_flag(skb, flags, mask,
3184 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3185 brport_nla_put_flag(skb, flags, mask,
3186 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3187 nla_nest_cancel(skb, protinfo);
3188 goto nla_put_failure;
3191 nla_nest_end(skb, protinfo);
3193 nlmsg_end(skb, nlh);
3196 nlmsg_cancel(skb, nlh);
3197 return err ? err : -EMSGSIZE;
3199 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
3201 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3203 struct net *net = sock_net(skb->sk);
3204 struct net_device *dev;
3206 u32 portid = NETLINK_CB(cb->skb).portid;
3207 u32 seq = cb->nlh->nlmsg_seq;
3208 u32 filter_mask = 0;
3211 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3212 struct nlattr *extfilt;
3214 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3217 if (nla_len(extfilt) < sizeof(filter_mask))
3220 filter_mask = nla_get_u32(extfilt);
3225 for_each_netdev_rcu(net, dev) {
3226 const struct net_device_ops *ops = dev->netdev_ops;
3227 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3229 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
3230 if (idx >= cb->args[0]) {
3231 err = br_dev->netdev_ops->ndo_bridge_getlink(
3232 skb, portid, seq, dev,
3233 filter_mask, NLM_F_MULTI);
3234 if (err < 0 && err != -EOPNOTSUPP)
3240 if (ops->ndo_bridge_getlink) {
3241 if (idx >= cb->args[0]) {
3242 err = ops->ndo_bridge_getlink(skb, portid,
3246 if (err < 0 && err != -EOPNOTSUPP)
3258 static inline size_t bridge_nlmsg_size(void)
3260 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3261 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3262 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3263 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3264 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3265 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3266 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3267 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3268 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3269 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3270 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3273 static int rtnl_bridge_notify(struct net_device *dev)
3275 struct net *net = dev_net(dev);
3276 struct sk_buff *skb;
3277 int err = -EOPNOTSUPP;
3279 if (!dev->netdev_ops->ndo_bridge_getlink)
3282 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3288 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
3295 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3298 WARN_ON(err == -EMSGSIZE);
3301 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
3305 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
3307 struct net *net = sock_net(skb->sk);
3308 struct ifinfomsg *ifm;
3309 struct net_device *dev;
3310 struct nlattr *br_spec, *attr = NULL;
3311 int rem, err = -EOPNOTSUPP;
3313 bool have_flags = false;
3315 if (nlmsg_len(nlh) < sizeof(*ifm))
3318 ifm = nlmsg_data(nlh);
3319 if (ifm->ifi_family != AF_BRIDGE)
3320 return -EPFNOSUPPORT;
3322 dev = __dev_get_by_index(net, ifm->ifi_index);
3324 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3328 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3330 nla_for_each_nested(attr, br_spec, rem) {
3331 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3332 if (nla_len(attr) < sizeof(flags))
3336 flags = nla_get_u16(attr);
3342 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3343 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3345 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
3350 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
3354 flags &= ~BRIDGE_FLAGS_MASTER;
3357 if ((flags & BRIDGE_FLAGS_SELF)) {
3358 if (!dev->netdev_ops->ndo_bridge_setlink)
3361 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3364 flags &= ~BRIDGE_FLAGS_SELF;
3366 /* Generate event to notify upper layer of bridge
3369 err = rtnl_bridge_notify(dev);
3374 memcpy(nla_data(attr), &flags, sizeof(flags));
3379 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
3381 struct net *net = sock_net(skb->sk);
3382 struct ifinfomsg *ifm;
3383 struct net_device *dev;
3384 struct nlattr *br_spec, *attr = NULL;
3385 int rem, err = -EOPNOTSUPP;
3387 bool have_flags = false;
3389 if (nlmsg_len(nlh) < sizeof(*ifm))
3392 ifm = nlmsg_data(nlh);
3393 if (ifm->ifi_family != AF_BRIDGE)
3394 return -EPFNOSUPPORT;
3396 dev = __dev_get_by_index(net, ifm->ifi_index);
3398 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3402 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3404 nla_for_each_nested(attr, br_spec, rem) {
3405 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
3406 if (nla_len(attr) < sizeof(flags))
3410 flags = nla_get_u16(attr);
3416 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3417 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3419 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3424 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
3428 flags &= ~BRIDGE_FLAGS_MASTER;
3431 if ((flags & BRIDGE_FLAGS_SELF)) {
3432 if (!dev->netdev_ops->ndo_bridge_dellink)
3435 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3439 flags &= ~BRIDGE_FLAGS_SELF;
3441 /* Generate event to notify upper layer of bridge
3444 err = rtnl_bridge_notify(dev);
3449 memcpy(nla_data(attr), &flags, sizeof(flags));
3454 /* Process one rtnetlink message. */
3456 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
3458 struct net *net = sock_net(skb->sk);
3459 rtnl_doit_func doit;
3465 type = nlh->nlmsg_type;
3471 /* All the messages must have at least 1 byte length */
3472 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
3475 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
3478 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
3481 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
3483 rtnl_dumpit_func dumpit;
3484 rtnl_calcit_func calcit;
3485 u16 min_dump_alloc = 0;
3487 dumpit = rtnl_get_dumpit(family, type);
3490 calcit = rtnl_get_calcit(family, type);
3492 min_dump_alloc = calcit(skb, nlh);
3497 struct netlink_dump_control c = {
3499 .min_dump_alloc = min_dump_alloc,
3501 err = netlink_dump_start(rtnl, skb, nlh, &c);
3507 doit = rtnl_get_doit(family, type);
3511 return doit(skb, nlh);
3514 static void rtnetlink_rcv(struct sk_buff *skb)
3517 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
3521 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
3523 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3529 case NETDEV_POST_INIT:
3530 case NETDEV_REGISTER:
3532 case NETDEV_PRE_TYPE_CHANGE:
3533 case NETDEV_GOING_DOWN:
3534 case NETDEV_UNREGISTER:
3535 case NETDEV_UNREGISTER_FINAL:
3536 case NETDEV_RELEASE:
3538 case NETDEV_BONDING_INFO:
3541 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
3547 static struct notifier_block rtnetlink_dev_notifier = {
3548 .notifier_call = rtnetlink_event,
3552 static int __net_init rtnetlink_net_init(struct net *net)
3555 struct netlink_kernel_cfg cfg = {
3556 .groups = RTNLGRP_MAX,
3557 .input = rtnetlink_rcv,
3558 .cb_mutex = &rtnl_mutex,
3559 .flags = NL_CFG_F_NONROOT_RECV,
3562 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
3569 static void __net_exit rtnetlink_net_exit(struct net *net)
3571 netlink_kernel_release(net->rtnl);
3575 static struct pernet_operations rtnetlink_net_ops = {
3576 .init = rtnetlink_net_init,
3577 .exit = rtnetlink_net_exit,
3580 void __init rtnetlink_init(void)
3582 if (register_pernet_subsys(&rtnetlink_net_ops))
3583 panic("rtnetlink_init: cannot initialize rtnetlink\n");
3585 register_netdevice_notifier(&rtnetlink_dev_notifier);
3587 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
3588 rtnl_dump_ifinfo, rtnl_calcit);
3589 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
3590 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
3591 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
3593 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
3594 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
3596 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
3597 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
3598 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
3600 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
3601 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
3602 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);