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/pci.h>
40 #include <linux/etherdevice.h>
42 #include <asm/uaccess.h>
44 #include <linux/inet.h>
45 #include <linux/netdevice.h>
47 #include <net/protocol.h>
49 #include <net/route.h>
52 #include <net/pkt_sched.h>
53 #include <net/fib_rules.h>
54 #include <net/rtnetlink.h>
55 #include <net/net_namespace.h>
59 rtnl_dumpit_func dumpit;
60 rtnl_calcit_func calcit;
63 static DEFINE_MUTEX(rtnl_mutex);
67 mutex_lock(&rtnl_mutex);
69 EXPORT_SYMBOL(rtnl_lock);
71 void __rtnl_unlock(void)
73 mutex_unlock(&rtnl_mutex);
76 void rtnl_unlock(void)
78 /* This fellow will unlock it for us. */
81 EXPORT_SYMBOL(rtnl_unlock);
83 int rtnl_trylock(void)
85 return mutex_trylock(&rtnl_mutex);
87 EXPORT_SYMBOL(rtnl_trylock);
89 int rtnl_is_locked(void)
91 return mutex_is_locked(&rtnl_mutex);
93 EXPORT_SYMBOL(rtnl_is_locked);
95 #ifdef CONFIG_PROVE_LOCKING
96 int lockdep_rtnl_is_held(void)
98 return lockdep_is_held(&rtnl_mutex);
100 EXPORT_SYMBOL(lockdep_rtnl_is_held);
101 #endif /* #ifdef CONFIG_PROVE_LOCKING */
103 static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
105 static inline int rtm_msgindex(int msgtype)
107 int msgindex = msgtype - RTM_BASE;
110 * msgindex < 0 implies someone tried to register a netlink
111 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
112 * the message type has not been added to linux/rtnetlink.h
114 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
119 static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
121 struct rtnl_link *tab;
123 if (protocol <= RTNL_FAMILY_MAX)
124 tab = rtnl_msg_handlers[protocol];
128 if (tab == NULL || tab[msgindex].doit == NULL)
129 tab = rtnl_msg_handlers[PF_UNSPEC];
131 return tab ? tab[msgindex].doit : NULL;
134 static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
136 struct rtnl_link *tab;
138 if (protocol <= RTNL_FAMILY_MAX)
139 tab = rtnl_msg_handlers[protocol];
143 if (tab == NULL || tab[msgindex].dumpit == NULL)
144 tab = rtnl_msg_handlers[PF_UNSPEC];
146 return tab ? tab[msgindex].dumpit : NULL;
149 static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
151 struct rtnl_link *tab;
153 if (protocol <= RTNL_FAMILY_MAX)
154 tab = rtnl_msg_handlers[protocol];
158 if (tab == NULL || tab[msgindex].calcit == NULL)
159 tab = rtnl_msg_handlers[PF_UNSPEC];
161 return tab ? tab[msgindex].calcit : NULL;
165 * __rtnl_register - Register a rtnetlink message type
166 * @protocol: Protocol family or PF_UNSPEC
167 * @msgtype: rtnetlink message type
168 * @doit: Function pointer called for each request message
169 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
170 * @calcit: Function pointer to calc size of dump message
172 * Registers the specified function pointers (at least one of them has
173 * to be non-NULL) to be called whenever a request message for the
174 * specified protocol family and message type is received.
176 * The special protocol family PF_UNSPEC may be used to define fallback
177 * function pointers for the case when no entry for the specific protocol
180 * Returns 0 on success or a negative error code.
182 int __rtnl_register(int protocol, int msgtype,
183 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
184 rtnl_calcit_func calcit)
186 struct rtnl_link *tab;
189 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
190 msgindex = rtm_msgindex(msgtype);
192 tab = rtnl_msg_handlers[protocol];
194 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
198 rtnl_msg_handlers[protocol] = tab;
202 tab[msgindex].doit = doit;
205 tab[msgindex].dumpit = dumpit;
208 tab[msgindex].calcit = calcit;
212 EXPORT_SYMBOL_GPL(__rtnl_register);
215 * rtnl_register - Register a rtnetlink message type
217 * Identical to __rtnl_register() but panics on failure. This is useful
218 * as failure of this function is very unlikely, it can only happen due
219 * to lack of memory when allocating the chain to store all message
220 * handlers for a protocol. Meant for use in init functions where lack
221 * of memory implies no sense in continuing.
223 void rtnl_register(int protocol, int msgtype,
224 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
225 rtnl_calcit_func calcit)
227 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
228 panic("Unable to register rtnetlink message handler, "
229 "protocol = %d, message type = %d\n",
232 EXPORT_SYMBOL_GPL(rtnl_register);
235 * rtnl_unregister - Unregister a rtnetlink message type
236 * @protocol: Protocol family or PF_UNSPEC
237 * @msgtype: rtnetlink message type
239 * Returns 0 on success or a negative error code.
241 int rtnl_unregister(int protocol, int msgtype)
245 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
246 msgindex = rtm_msgindex(msgtype);
248 if (rtnl_msg_handlers[protocol] == NULL)
251 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
252 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
256 EXPORT_SYMBOL_GPL(rtnl_unregister);
259 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
260 * @protocol : Protocol family or PF_UNSPEC
262 * Identical to calling rtnl_unregster() for all registered message types
263 * of a certain protocol family.
265 void rtnl_unregister_all(int protocol)
267 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
269 kfree(rtnl_msg_handlers[protocol]);
270 rtnl_msg_handlers[protocol] = NULL;
272 EXPORT_SYMBOL_GPL(rtnl_unregister_all);
274 static LIST_HEAD(link_ops);
276 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
278 const struct rtnl_link_ops *ops;
280 list_for_each_entry(ops, &link_ops, list) {
281 if (!strcmp(ops->kind, kind))
288 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
289 * @ops: struct rtnl_link_ops * to register
291 * The caller must hold the rtnl_mutex. This function should be used
292 * by drivers that create devices during module initialization. It
293 * must be called before registering the devices.
295 * Returns 0 on success or a negative error code.
297 int __rtnl_link_register(struct rtnl_link_ops *ops)
299 if (rtnl_link_ops_get(ops->kind))
303 ops->dellink = unregister_netdevice_queue;
305 list_add_tail(&ops->list, &link_ops);
308 EXPORT_SYMBOL_GPL(__rtnl_link_register);
311 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
312 * @ops: struct rtnl_link_ops * to register
314 * Returns 0 on success or a negative error code.
316 int rtnl_link_register(struct rtnl_link_ops *ops)
321 err = __rtnl_link_register(ops);
325 EXPORT_SYMBOL_GPL(rtnl_link_register);
327 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
329 struct net_device *dev;
330 LIST_HEAD(list_kill);
332 for_each_netdev(net, dev) {
333 if (dev->rtnl_link_ops == ops)
334 ops->dellink(dev, &list_kill);
336 unregister_netdevice_many(&list_kill);
340 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
341 * @ops: struct rtnl_link_ops * to unregister
343 * The caller must hold the rtnl_mutex.
345 void __rtnl_link_unregister(struct rtnl_link_ops *ops)
350 __rtnl_kill_links(net, ops);
352 list_del(&ops->list);
354 EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
357 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
358 * @ops: struct rtnl_link_ops * to unregister
360 void rtnl_link_unregister(struct rtnl_link_ops *ops)
363 __rtnl_link_unregister(ops);
366 EXPORT_SYMBOL_GPL(rtnl_link_unregister);
368 static size_t rtnl_link_get_size(const struct net_device *dev)
370 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
376 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
377 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
380 /* IFLA_INFO_DATA + nested data */
381 size += nla_total_size(sizeof(struct nlattr)) +
384 if (ops->get_xstats_size)
385 /* IFLA_INFO_XSTATS */
386 size += nla_total_size(ops->get_xstats_size(dev));
391 static LIST_HEAD(rtnl_af_ops);
393 static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
395 const struct rtnl_af_ops *ops;
397 list_for_each_entry(ops, &rtnl_af_ops, list) {
398 if (ops->family == family)
406 * __rtnl_af_register - Register rtnl_af_ops with rtnetlink.
407 * @ops: struct rtnl_af_ops * to register
409 * The caller must hold the rtnl_mutex.
411 * Returns 0 on success or a negative error code.
413 int __rtnl_af_register(struct rtnl_af_ops *ops)
415 list_add_tail(&ops->list, &rtnl_af_ops);
418 EXPORT_SYMBOL_GPL(__rtnl_af_register);
421 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
422 * @ops: struct rtnl_af_ops * to register
424 * Returns 0 on success or a negative error code.
426 int rtnl_af_register(struct rtnl_af_ops *ops)
431 err = __rtnl_af_register(ops);
435 EXPORT_SYMBOL_GPL(rtnl_af_register);
438 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
439 * @ops: struct rtnl_af_ops * to unregister
441 * The caller must hold the rtnl_mutex.
443 void __rtnl_af_unregister(struct rtnl_af_ops *ops)
445 list_del(&ops->list);
447 EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
450 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
451 * @ops: struct rtnl_af_ops * to unregister
453 void rtnl_af_unregister(struct rtnl_af_ops *ops)
456 __rtnl_af_unregister(ops);
459 EXPORT_SYMBOL_GPL(rtnl_af_unregister);
461 static size_t rtnl_link_get_af_size(const struct net_device *dev)
463 struct rtnl_af_ops *af_ops;
467 size = nla_total_size(sizeof(struct nlattr));
469 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
470 if (af_ops->get_link_af_size) {
471 /* AF_* + nested data */
472 size += nla_total_size(sizeof(struct nlattr)) +
473 af_ops->get_link_af_size(dev);
480 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
482 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
483 struct nlattr *linkinfo, *data;
486 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
487 if (linkinfo == NULL)
490 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
491 goto err_cancel_link;
492 if (ops->fill_xstats) {
493 err = ops->fill_xstats(skb, dev);
495 goto err_cancel_link;
497 if (ops->fill_info) {
498 data = nla_nest_start(skb, IFLA_INFO_DATA);
500 goto err_cancel_link;
501 err = ops->fill_info(skb, dev);
503 goto err_cancel_data;
504 nla_nest_end(skb, data);
507 nla_nest_end(skb, linkinfo);
511 nla_nest_cancel(skb, data);
513 nla_nest_cancel(skb, linkinfo);
518 static const int rtm_min[RTM_NR_FAMILIES] =
520 [RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
521 [RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)),
522 [RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)),
523 [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)),
524 [RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
525 [RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
526 [RTM_FAM(RTM_NEWTFILTER)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
527 [RTM_FAM(RTM_NEWACTION)] = NLMSG_LENGTH(sizeof(struct tcamsg)),
528 [RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
529 [RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
532 static const int rta_max[RTM_NR_FAMILIES] =
534 [RTM_FAM(RTM_NEWLINK)] = IFLA_MAX,
535 [RTM_FAM(RTM_NEWADDR)] = IFA_MAX,
536 [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX,
537 [RTM_FAM(RTM_NEWRULE)] = FRA_MAX,
538 [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX,
539 [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX,
540 [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX,
541 [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX,
544 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
546 struct sock *rtnl = net->rtnl;
549 NETLINK_CB(skb).dst_group = group;
551 atomic_inc(&skb->users);
552 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
554 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
558 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
560 struct sock *rtnl = net->rtnl;
562 return nlmsg_unicast(rtnl, skb, pid);
564 EXPORT_SYMBOL(rtnl_unicast);
566 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
567 struct nlmsghdr *nlh, gfp_t flags)
569 struct sock *rtnl = net->rtnl;
573 report = nlmsg_report(nlh);
575 nlmsg_notify(rtnl, skb, pid, group, report, flags);
577 EXPORT_SYMBOL(rtnl_notify);
579 void rtnl_set_sk_err(struct net *net, u32 group, int error)
581 struct sock *rtnl = net->rtnl;
583 netlink_set_err(rtnl, 0, group, error);
585 EXPORT_SYMBOL(rtnl_set_sk_err);
587 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
592 mx = nla_nest_start(skb, RTA_METRICS);
596 for (i = 0; i < RTAX_MAX; i++) {
599 if (nla_put_u32(skb, i+1, metrics[i]))
600 goto nla_put_failure;
605 nla_nest_cancel(skb, mx);
609 return nla_nest_end(skb, mx);
612 nla_nest_cancel(skb, mx);
615 EXPORT_SYMBOL(rtnetlink_put_metrics);
617 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
618 long expires, u32 error)
620 struct rta_cacheinfo ci = {
621 .rta_lastuse = jiffies_to_clock_t(jiffies - dst->lastuse),
622 .rta_used = dst->__use,
623 .rta_clntref = atomic_read(&(dst->__refcnt)),
629 ci.rta_expires = jiffies_to_clock_t(expires);
631 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
633 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
635 static void set_operstate(struct net_device *dev, unsigned char transition)
637 unsigned char operstate = dev->operstate;
639 switch (transition) {
641 if ((operstate == IF_OPER_DORMANT ||
642 operstate == IF_OPER_UNKNOWN) &&
644 operstate = IF_OPER_UP;
647 case IF_OPER_DORMANT:
648 if (operstate == IF_OPER_UP ||
649 operstate == IF_OPER_UNKNOWN)
650 operstate = IF_OPER_DORMANT;
654 if (dev->operstate != operstate) {
655 write_lock_bh(&dev_base_lock);
656 dev->operstate = operstate;
657 write_unlock_bh(&dev_base_lock);
658 netdev_state_change(dev);
662 static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
664 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
665 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
668 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
669 const struct ifinfomsg *ifm)
671 unsigned int flags = ifm->ifi_flags;
673 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
675 flags = (flags & ifm->ifi_change) |
676 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
681 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
682 const struct rtnl_link_stats64 *b)
684 a->rx_packets = b->rx_packets;
685 a->tx_packets = b->tx_packets;
686 a->rx_bytes = b->rx_bytes;
687 a->tx_bytes = b->tx_bytes;
688 a->rx_errors = b->rx_errors;
689 a->tx_errors = b->tx_errors;
690 a->rx_dropped = b->rx_dropped;
691 a->tx_dropped = b->tx_dropped;
693 a->multicast = b->multicast;
694 a->collisions = b->collisions;
696 a->rx_length_errors = b->rx_length_errors;
697 a->rx_over_errors = b->rx_over_errors;
698 a->rx_crc_errors = b->rx_crc_errors;
699 a->rx_frame_errors = b->rx_frame_errors;
700 a->rx_fifo_errors = b->rx_fifo_errors;
701 a->rx_missed_errors = b->rx_missed_errors;
703 a->tx_aborted_errors = b->tx_aborted_errors;
704 a->tx_carrier_errors = b->tx_carrier_errors;
705 a->tx_fifo_errors = b->tx_fifo_errors;
706 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
707 a->tx_window_errors = b->tx_window_errors;
709 a->rx_compressed = b->rx_compressed;
710 a->tx_compressed = b->tx_compressed;
713 static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
715 memcpy(v, b, sizeof(*b));
719 static inline int rtnl_vfinfo_size(const struct net_device *dev,
722 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
723 (ext_filter_mask & RTEXT_FILTER_VF)) {
724 int num_vfs = dev_num_vf(dev->dev.parent);
725 size_t size = nla_total_size(sizeof(struct nlattr));
726 size += nla_total_size(num_vfs * sizeof(struct nlattr));
728 (nla_total_size(sizeof(struct ifla_vf_mac)) +
729 nla_total_size(sizeof(struct ifla_vf_vlan)) +
730 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
731 nla_total_size(sizeof(struct ifla_vf_spoofchk)));
737 static size_t rtnl_port_size(const struct net_device *dev)
739 size_t port_size = nla_total_size(4) /* PORT_VF */
740 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
741 + nla_total_size(sizeof(struct ifla_port_vsi))
743 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
744 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
745 + nla_total_size(1) /* PROT_VDP_REQUEST */
746 + nla_total_size(2); /* PORT_VDP_RESPONSE */
747 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
748 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
750 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
753 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
755 if (dev_num_vf(dev->dev.parent))
756 return port_self_size + vf_ports_size +
757 vf_port_size * dev_num_vf(dev->dev.parent);
759 return port_self_size;
762 static noinline size_t if_nlmsg_size(const struct net_device *dev,
765 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
766 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
767 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
768 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
769 + nla_total_size(sizeof(struct rtnl_link_ifmap))
770 + nla_total_size(sizeof(struct rtnl_link_stats))
771 + nla_total_size(sizeof(struct rtnl_link_stats64))
772 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
773 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
774 + nla_total_size(4) /* IFLA_TXQLEN */
775 + nla_total_size(4) /* IFLA_WEIGHT */
776 + nla_total_size(4) /* IFLA_MTU */
777 + nla_total_size(4) /* IFLA_LINK */
778 + nla_total_size(4) /* IFLA_MASTER */
779 + nla_total_size(4) /* IFLA_PROMISCUITY */
780 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
781 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
782 + nla_total_size(1) /* IFLA_OPERSTATE */
783 + nla_total_size(1) /* IFLA_LINKMODE */
784 + nla_total_size(ext_filter_mask
785 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
786 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
787 + rtnl_port_size(dev) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
788 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
789 + rtnl_link_get_af_size(dev); /* IFLA_AF_SPEC */
792 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
794 struct nlattr *vf_ports;
795 struct nlattr *vf_port;
799 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
803 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
804 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
806 goto nla_put_failure;
807 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
808 goto nla_put_failure;
809 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
810 if (err == -EMSGSIZE)
811 goto nla_put_failure;
813 nla_nest_cancel(skb, vf_port);
816 nla_nest_end(skb, vf_port);
819 nla_nest_end(skb, vf_ports);
824 nla_nest_cancel(skb, vf_ports);
828 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
830 struct nlattr *port_self;
833 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
837 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
839 nla_nest_cancel(skb, port_self);
840 return (err == -EMSGSIZE) ? err : 0;
843 nla_nest_end(skb, port_self);
848 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev)
852 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
855 err = rtnl_port_self_fill(skb, dev);
859 if (dev_num_vf(dev->dev.parent)) {
860 err = rtnl_vf_ports_fill(skb, dev);
868 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
869 int type, u32 pid, u32 seq, u32 change,
870 unsigned int flags, u32 ext_filter_mask)
872 struct ifinfomsg *ifm;
873 struct nlmsghdr *nlh;
874 struct rtnl_link_stats64 temp;
875 const struct rtnl_link_stats64 *stats;
876 struct nlattr *attr, *af_spec;
877 struct rtnl_af_ops *af_ops;
880 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
884 ifm = nlmsg_data(nlh);
885 ifm->ifi_family = AF_UNSPEC;
887 ifm->ifi_type = dev->type;
888 ifm->ifi_index = dev->ifindex;
889 ifm->ifi_flags = dev_get_flags(dev);
890 ifm->ifi_change = change;
892 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
893 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
894 nla_put_u8(skb, IFLA_OPERSTATE,
895 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
896 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
897 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
898 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
899 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
900 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
902 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
904 (dev->ifindex != dev->iflink &&
905 nla_put_u32(skb, IFLA_LINK, dev->iflink)) ||
907 nla_put_u32(skb, IFLA_MASTER, dev->master->ifindex)) ||
909 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
911 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)))
912 goto nla_put_failure;
915 struct rtnl_link_ifmap map = {
916 .mem_start = dev->mem_start,
917 .mem_end = dev->mem_end,
918 .base_addr = dev->base_addr,
921 .port = dev->if_port,
923 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
924 goto nla_put_failure;
928 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
929 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
930 goto nla_put_failure;
933 attr = nla_reserve(skb, IFLA_STATS,
934 sizeof(struct rtnl_link_stats));
936 goto nla_put_failure;
938 stats = dev_get_stats(dev, &temp);
939 copy_rtnl_link_stats(nla_data(attr), stats);
941 attr = nla_reserve(skb, IFLA_STATS64,
942 sizeof(struct rtnl_link_stats64));
944 goto nla_put_failure;
945 copy_rtnl_link_stats64(nla_data(attr), stats);
947 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
948 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
949 goto nla_put_failure;
951 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent
952 && (ext_filter_mask & RTEXT_FILTER_VF)) {
955 struct nlattr *vfinfo, *vf;
956 int num_vfs = dev_num_vf(dev->dev.parent);
958 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
960 goto nla_put_failure;
961 for (i = 0; i < num_vfs; i++) {
962 struct ifla_vf_info ivi;
963 struct ifla_vf_mac vf_mac;
964 struct ifla_vf_vlan vf_vlan;
965 struct ifla_vf_tx_rate vf_tx_rate;
966 struct ifla_vf_spoofchk vf_spoofchk;
969 * Not all SR-IOV capable drivers support the
970 * spoofcheck query. Preset to -1 so the user
971 * space tool can detect that the driver didn't
975 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
980 vf_spoofchk.vf = ivi.vf;
982 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
983 vf_vlan.vlan = ivi.vlan;
984 vf_vlan.qos = ivi.qos;
985 vf_tx_rate.rate = ivi.tx_rate;
986 vf_spoofchk.setting = ivi.spoofchk;
987 vf = nla_nest_start(skb, IFLA_VF_INFO);
989 nla_nest_cancel(skb, vfinfo);
990 goto nla_put_failure;
992 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
993 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
994 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
996 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
998 goto nla_put_failure;
999 nla_nest_end(skb, vf);
1001 nla_nest_end(skb, vfinfo);
1004 if (rtnl_port_fill(skb, dev))
1005 goto nla_put_failure;
1007 if (dev->rtnl_link_ops) {
1008 if (rtnl_link_fill(skb, dev) < 0)
1009 goto nla_put_failure;
1012 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1013 goto nla_put_failure;
1015 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1016 if (af_ops->fill_link_af) {
1020 if (!(af = nla_nest_start(skb, af_ops->family)))
1021 goto nla_put_failure;
1023 err = af_ops->fill_link_af(skb, dev);
1026 * Caller may return ENODATA to indicate that there
1027 * was no data to be dumped. This is not an error, it
1028 * means we should trim the attribute header and
1031 if (err == -ENODATA)
1032 nla_nest_cancel(skb, af);
1034 goto nla_put_failure;
1036 nla_nest_end(skb, af);
1040 nla_nest_end(skb, af_spec);
1042 return nlmsg_end(skb, nlh);
1045 nlmsg_cancel(skb, nlh);
1049 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1051 struct net *net = sock_net(skb->sk);
1054 struct net_device *dev;
1055 struct hlist_head *head;
1056 struct hlist_node *node;
1057 struct nlattr *tb[IFLA_MAX+1];
1058 u32 ext_filter_mask = 0;
1061 s_idx = cb->args[1];
1064 cb->seq = net->dev_base_seq;
1066 if (nlmsg_parse(cb->nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX,
1067 ifla_policy) >= 0) {
1069 if (tb[IFLA_EXT_MASK])
1070 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1073 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1075 head = &net->dev_index_head[h];
1076 hlist_for_each_entry_rcu(dev, node, head, index_hlist) {
1079 if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1080 NETLINK_CB(cb->skb).pid,
1081 cb->nlh->nlmsg_seq, 0,
1083 ext_filter_mask) <= 0)
1086 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1099 const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1100 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1101 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1102 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1103 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1104 [IFLA_MTU] = { .type = NLA_U32 },
1105 [IFLA_LINK] = { .type = NLA_U32 },
1106 [IFLA_MASTER] = { .type = NLA_U32 },
1107 [IFLA_TXQLEN] = { .type = NLA_U32 },
1108 [IFLA_WEIGHT] = { .type = NLA_U32 },
1109 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1110 [IFLA_LINKMODE] = { .type = NLA_U8 },
1111 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1112 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1113 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1114 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1115 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1116 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1117 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1118 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1119 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1120 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1121 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1122 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1124 EXPORT_SYMBOL(ifla_policy);
1126 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1127 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1128 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1131 static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
1132 [IFLA_VF_INFO] = { .type = NLA_NESTED },
1135 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1136 [IFLA_VF_MAC] = { .type = NLA_BINARY,
1137 .len = sizeof(struct ifla_vf_mac) },
1138 [IFLA_VF_VLAN] = { .type = NLA_BINARY,
1139 .len = sizeof(struct ifla_vf_vlan) },
1140 [IFLA_VF_TX_RATE] = { .type = NLA_BINARY,
1141 .len = sizeof(struct ifla_vf_tx_rate) },
1142 [IFLA_VF_SPOOFCHK] = { .type = NLA_BINARY,
1143 .len = sizeof(struct ifla_vf_spoofchk) },
1146 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1147 [IFLA_PORT_VF] = { .type = NLA_U32 },
1148 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1149 .len = PORT_PROFILE_MAX },
1150 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1151 .len = sizeof(struct ifla_port_vsi)},
1152 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1153 .len = PORT_UUID_MAX },
1154 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1155 .len = PORT_UUID_MAX },
1156 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1157 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1160 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1163 /* Examine the link attributes and figure out which
1164 * network namespace we are talking about.
1166 if (tb[IFLA_NET_NS_PID])
1167 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1168 else if (tb[IFLA_NET_NS_FD])
1169 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1171 net = get_net(src_net);
1174 EXPORT_SYMBOL(rtnl_link_get_net);
1176 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1179 if (tb[IFLA_ADDRESS] &&
1180 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1183 if (tb[IFLA_BROADCAST] &&
1184 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1188 if (tb[IFLA_AF_SPEC]) {
1192 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1193 const struct rtnl_af_ops *af_ops;
1195 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1196 return -EAFNOSUPPORT;
1198 if (!af_ops->set_link_af)
1201 if (af_ops->validate_link_af) {
1202 err = af_ops->validate_link_af(dev, af);
1212 static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
1214 int rem, err = -EINVAL;
1216 const struct net_device_ops *ops = dev->netdev_ops;
1218 nla_for_each_nested(vf, attr, rem) {
1219 switch (nla_type(vf)) {
1221 struct ifla_vf_mac *ivm;
1224 if (ops->ndo_set_vf_mac)
1225 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1229 case IFLA_VF_VLAN: {
1230 struct ifla_vf_vlan *ivv;
1233 if (ops->ndo_set_vf_vlan)
1234 err = ops->ndo_set_vf_vlan(dev, ivv->vf,
1239 case IFLA_VF_TX_RATE: {
1240 struct ifla_vf_tx_rate *ivt;
1243 if (ops->ndo_set_vf_tx_rate)
1244 err = ops->ndo_set_vf_tx_rate(dev, ivt->vf,
1248 case IFLA_VF_SPOOFCHK: {
1249 struct ifla_vf_spoofchk *ivs;
1252 if (ops->ndo_set_vf_spoofchk)
1253 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1267 static int do_set_master(struct net_device *dev, int ifindex)
1269 struct net_device *master_dev;
1270 const struct net_device_ops *ops;
1274 if (dev->master->ifindex == ifindex)
1276 ops = dev->master->netdev_ops;
1277 if (ops->ndo_del_slave) {
1278 err = ops->ndo_del_slave(dev->master, dev);
1287 master_dev = __dev_get_by_index(dev_net(dev), ifindex);
1290 ops = master_dev->netdev_ops;
1291 if (ops->ndo_add_slave) {
1292 err = ops->ndo_add_slave(master_dev, dev);
1302 static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
1303 struct nlattr **tb, char *ifname, int modified)
1305 const struct net_device_ops *ops = dev->netdev_ops;
1306 int send_addr_notify = 0;
1309 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
1310 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1315 err = dev_change_net_namespace(dev, net, ifname);
1323 struct rtnl_link_ifmap *u_map;
1326 if (!ops->ndo_set_config) {
1331 if (!netif_device_present(dev)) {
1336 u_map = nla_data(tb[IFLA_MAP]);
1337 k_map.mem_start = (unsigned long) u_map->mem_start;
1338 k_map.mem_end = (unsigned long) u_map->mem_end;
1339 k_map.base_addr = (unsigned short) u_map->base_addr;
1340 k_map.irq = (unsigned char) u_map->irq;
1341 k_map.dma = (unsigned char) u_map->dma;
1342 k_map.port = (unsigned char) u_map->port;
1344 err = ops->ndo_set_config(dev, &k_map);
1351 if (tb[IFLA_ADDRESS]) {
1352 struct sockaddr *sa;
1355 if (!ops->ndo_set_mac_address) {
1360 if (!netif_device_present(dev)) {
1365 len = sizeof(sa_family_t) + dev->addr_len;
1366 sa = kmalloc(len, GFP_KERNEL);
1371 sa->sa_family = dev->type;
1372 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1374 err = ops->ndo_set_mac_address(dev, sa);
1378 send_addr_notify = 1;
1383 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1389 if (tb[IFLA_GROUP]) {
1390 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1395 * Interface selected by interface index but interface
1396 * name provided implies that a name change has been
1399 if (ifm->ifi_index > 0 && ifname[0]) {
1400 err = dev_change_name(dev, ifname);
1406 if (tb[IFLA_IFALIAS]) {
1407 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1408 nla_len(tb[IFLA_IFALIAS]));
1414 if (tb[IFLA_BROADCAST]) {
1415 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1416 send_addr_notify = 1;
1419 if (ifm->ifi_flags || ifm->ifi_change) {
1420 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1425 if (tb[IFLA_MASTER]) {
1426 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1432 if (tb[IFLA_TXQLEN])
1433 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1435 if (tb[IFLA_OPERSTATE])
1436 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1438 if (tb[IFLA_LINKMODE]) {
1439 write_lock_bh(&dev_base_lock);
1440 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1441 write_unlock_bh(&dev_base_lock);
1444 if (tb[IFLA_VFINFO_LIST]) {
1445 struct nlattr *attr;
1447 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
1448 if (nla_type(attr) != IFLA_VF_INFO) {
1452 err = do_setvfinfo(dev, attr);
1460 if (tb[IFLA_VF_PORTS]) {
1461 struct nlattr *port[IFLA_PORT_MAX+1];
1462 struct nlattr *attr;
1467 if (!ops->ndo_set_vf_port)
1470 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1471 if (nla_type(attr) != IFLA_VF_PORT)
1473 err = nla_parse_nested(port, IFLA_PORT_MAX,
1474 attr, ifla_port_policy);
1477 if (!port[IFLA_PORT_VF]) {
1481 vf = nla_get_u32(port[IFLA_PORT_VF]);
1482 err = ops->ndo_set_vf_port(dev, vf, port);
1490 if (tb[IFLA_PORT_SELF]) {
1491 struct nlattr *port[IFLA_PORT_MAX+1];
1493 err = nla_parse_nested(port, IFLA_PORT_MAX,
1494 tb[IFLA_PORT_SELF], ifla_port_policy);
1499 if (ops->ndo_set_vf_port)
1500 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1506 if (tb[IFLA_AF_SPEC]) {
1510 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1511 const struct rtnl_af_ops *af_ops;
1513 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1516 err = af_ops->set_link_af(dev, af);
1526 if (err < 0 && modified)
1527 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",
1530 if (send_addr_notify)
1531 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1536 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1538 struct net *net = sock_net(skb->sk);
1539 struct ifinfomsg *ifm;
1540 struct net_device *dev;
1542 struct nlattr *tb[IFLA_MAX+1];
1543 char ifname[IFNAMSIZ];
1545 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1549 if (tb[IFLA_IFNAME])
1550 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1555 ifm = nlmsg_data(nlh);
1556 if (ifm->ifi_index > 0)
1557 dev = __dev_get_by_index(net, ifm->ifi_index);
1558 else if (tb[IFLA_IFNAME])
1559 dev = __dev_get_by_name(net, ifname);
1568 err = validate_linkmsg(dev, tb);
1572 err = do_setlink(dev, ifm, tb, ifname, 0);
1577 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1579 struct net *net = sock_net(skb->sk);
1580 const struct rtnl_link_ops *ops;
1581 struct net_device *dev;
1582 struct ifinfomsg *ifm;
1583 char ifname[IFNAMSIZ];
1584 struct nlattr *tb[IFLA_MAX+1];
1586 LIST_HEAD(list_kill);
1588 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1592 if (tb[IFLA_IFNAME])
1593 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1595 ifm = nlmsg_data(nlh);
1596 if (ifm->ifi_index > 0)
1597 dev = __dev_get_by_index(net, ifm->ifi_index);
1598 else if (tb[IFLA_IFNAME])
1599 dev = __dev_get_by_name(net, ifname);
1606 ops = dev->rtnl_link_ops;
1610 ops->dellink(dev, &list_kill);
1611 unregister_netdevice_many(&list_kill);
1612 list_del(&list_kill);
1616 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
1618 unsigned int old_flags;
1621 old_flags = dev->flags;
1622 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
1623 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1628 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
1629 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U);
1631 __dev_notify_flags(dev, old_flags);
1634 EXPORT_SYMBOL(rtnl_configure_link);
1636 struct net_device *rtnl_create_link(struct net *src_net, struct net *net,
1637 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
1640 struct net_device *dev;
1641 unsigned int num_tx_queues = 1;
1642 unsigned int num_rx_queues = 1;
1644 if (tb[IFLA_NUM_TX_QUEUES])
1645 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
1646 else if (ops->get_num_tx_queues)
1647 num_tx_queues = ops->get_num_tx_queues();
1649 if (tb[IFLA_NUM_RX_QUEUES])
1650 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
1651 else if (ops->get_num_rx_queues)
1652 num_rx_queues = ops->get_num_rx_queues();
1655 dev = alloc_netdev_mqs(ops->priv_size, ifname, ops->setup,
1656 num_tx_queues, num_rx_queues);
1660 dev_net_set(dev, net);
1661 dev->rtnl_link_ops = ops;
1662 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
1665 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
1666 if (tb[IFLA_ADDRESS])
1667 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
1668 nla_len(tb[IFLA_ADDRESS]));
1669 if (tb[IFLA_BROADCAST])
1670 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
1671 nla_len(tb[IFLA_BROADCAST]));
1672 if (tb[IFLA_TXQLEN])
1673 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1674 if (tb[IFLA_OPERSTATE])
1675 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1676 if (tb[IFLA_LINKMODE])
1677 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1679 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1684 return ERR_PTR(err);
1686 EXPORT_SYMBOL(rtnl_create_link);
1688 static int rtnl_group_changelink(struct net *net, int group,
1689 struct ifinfomsg *ifm,
1692 struct net_device *dev;
1695 for_each_netdev(net, dev) {
1696 if (dev->group == group) {
1697 err = do_setlink(dev, ifm, tb, NULL, 0);
1706 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1708 struct net *net = sock_net(skb->sk);
1709 const struct rtnl_link_ops *ops;
1710 struct net_device *dev;
1711 struct ifinfomsg *ifm;
1712 char kind[MODULE_NAME_LEN];
1713 char ifname[IFNAMSIZ];
1714 struct nlattr *tb[IFLA_MAX+1];
1715 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
1718 #ifdef CONFIG_MODULES
1721 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1725 if (tb[IFLA_IFNAME])
1726 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1730 ifm = nlmsg_data(nlh);
1731 if (ifm->ifi_index > 0)
1732 dev = __dev_get_by_index(net, ifm->ifi_index);
1735 dev = __dev_get_by_name(net, ifname);
1740 err = validate_linkmsg(dev, tb);
1744 if (tb[IFLA_LINKINFO]) {
1745 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
1746 tb[IFLA_LINKINFO], ifla_info_policy);
1750 memset(linkinfo, 0, sizeof(linkinfo));
1752 if (linkinfo[IFLA_INFO_KIND]) {
1753 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
1754 ops = rtnl_link_ops_get(kind);
1761 struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL;
1762 struct net *dest_net;
1765 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
1766 err = nla_parse_nested(attr, ops->maxtype,
1767 linkinfo[IFLA_INFO_DATA],
1773 if (ops->validate) {
1774 err = ops->validate(tb, data);
1783 if (nlh->nlmsg_flags & NLM_F_EXCL)
1785 if (nlh->nlmsg_flags & NLM_F_REPLACE)
1788 if (linkinfo[IFLA_INFO_DATA]) {
1789 if (!ops || ops != dev->rtnl_link_ops ||
1793 err = ops->changelink(dev, tb, data);
1799 return do_setlink(dev, ifm, tb, ifname, modified);
1802 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
1803 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
1804 return rtnl_group_changelink(net,
1805 nla_get_u32(tb[IFLA_GROUP]),
1812 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
1816 #ifdef CONFIG_MODULES
1819 request_module("rtnl-link-%s", kind);
1821 ops = rtnl_link_ops_get(kind);
1830 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
1832 dest_net = rtnl_link_get_net(net, tb);
1833 if (IS_ERR(dest_net))
1834 return PTR_ERR(dest_net);
1836 dev = rtnl_create_link(net, dest_net, ifname, ops, tb);
1840 else if (ops->newlink)
1841 err = ops->newlink(net, dev, tb, data);
1843 err = register_netdevice(dev);
1845 if (err < 0 && !IS_ERR(dev))
1850 err = rtnl_configure_link(dev, ifm);
1852 unregister_netdevice(dev);
1859 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
1861 struct net *net = sock_net(skb->sk);
1862 struct ifinfomsg *ifm;
1863 char ifname[IFNAMSIZ];
1864 struct nlattr *tb[IFLA_MAX+1];
1865 struct net_device *dev = NULL;
1866 struct sk_buff *nskb;
1868 u32 ext_filter_mask = 0;
1870 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1874 if (tb[IFLA_IFNAME])
1875 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1877 if (tb[IFLA_EXT_MASK])
1878 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1880 ifm = nlmsg_data(nlh);
1881 if (ifm->ifi_index > 0)
1882 dev = __dev_get_by_index(net, ifm->ifi_index);
1883 else if (tb[IFLA_IFNAME])
1884 dev = __dev_get_by_name(net, ifname);
1891 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
1895 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).pid,
1896 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
1898 /* -EMSGSIZE implies BUG in if_nlmsg_size */
1899 WARN_ON(err == -EMSGSIZE);
1902 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).pid);
1907 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
1909 struct net *net = sock_net(skb->sk);
1910 struct net_device *dev;
1911 struct nlattr *tb[IFLA_MAX+1];
1912 u32 ext_filter_mask = 0;
1913 u16 min_ifinfo_dump_size = 0;
1915 if (nlmsg_parse(nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX,
1916 ifla_policy) >= 0) {
1917 if (tb[IFLA_EXT_MASK])
1918 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1921 if (!ext_filter_mask)
1922 return NLMSG_GOODSIZE;
1924 * traverse the list of net devices and compute the minimum
1925 * buffer size based upon the filter mask.
1927 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
1928 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
1933 return min_ifinfo_dump_size;
1936 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1939 int s_idx = cb->family;
1943 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1944 int type = cb->nlh->nlmsg_type-RTM_BASE;
1945 if (idx < s_idx || idx == PF_PACKET)
1947 if (rtnl_msg_handlers[idx] == NULL ||
1948 rtnl_msg_handlers[idx][type].dumpit == NULL)
1951 memset(&cb->args[0], 0, sizeof(cb->args));
1952 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1960 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change)
1962 struct net *net = dev_net(dev);
1963 struct sk_buff *skb;
1965 size_t if_info_size;
1967 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), GFP_KERNEL);
1971 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
1973 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
1974 WARN_ON(err == -EMSGSIZE);
1978 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
1982 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
1985 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
1986 struct net_device *dev,
1987 u8 *addr, u32 pid, u32 seq,
1988 int type, unsigned int flags)
1990 struct nlmsghdr *nlh;
1993 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), NLM_F_MULTI);
1997 ndm = nlmsg_data(nlh);
1998 ndm->ndm_family = AF_BRIDGE;
2001 ndm->ndm_flags = flags;
2003 ndm->ndm_ifindex = dev->ifindex;
2004 ndm->ndm_state = NUD_PERMANENT;
2006 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2007 goto nla_put_failure;
2009 return nlmsg_end(skb, nlh);
2012 nlmsg_cancel(skb, nlh);
2016 static inline size_t rtnl_fdb_nlmsg_size(void)
2018 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2021 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type)
2023 struct net *net = dev_net(dev);
2024 struct sk_buff *skb;
2027 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2031 err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF);
2037 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2040 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2043 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2045 struct net *net = sock_net(skb->sk);
2046 struct net_device *master = NULL;
2048 struct nlattr *tb[NDA_MAX+1];
2049 struct net_device *dev;
2053 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2057 ndm = nlmsg_data(nlh);
2058 if (ndm->ndm_ifindex == 0) {
2059 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2063 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2065 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2069 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2070 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2074 addr = nla_data(tb[NDA_LLADDR]);
2075 if (!is_valid_ether_addr(addr)) {
2076 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ether address\n");
2082 /* Support fdb on master device the net/bridge default case */
2083 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2084 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2085 master = dev->master;
2086 err = master->netdev_ops->ndo_fdb_add(ndm, dev, addr,
2091 ndm->ndm_flags &= ~NTF_MASTER;
2094 /* Embedded bridge, macvlan, and any other device support */
2095 if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_add) {
2096 err = dev->netdev_ops->ndo_fdb_add(ndm, dev, addr,
2100 rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH);
2101 ndm->ndm_flags &= ~NTF_SELF;
2108 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
2110 struct net *net = sock_net(skb->sk);
2112 struct nlattr *llattr;
2113 struct net_device *dev;
2117 if (nlmsg_len(nlh) < sizeof(*ndm))
2120 ndm = nlmsg_data(nlh);
2121 if (ndm->ndm_ifindex == 0) {
2122 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2126 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2128 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2132 llattr = nlmsg_find_attr(nlh, sizeof(*ndm), NDA_LLADDR);
2133 if (llattr == NULL || nla_len(llattr) != ETH_ALEN) {
2134 pr_info("PF_BRIGDE: RTM_DELNEIGH with invalid address\n");
2138 addr = nla_data(llattr);
2141 /* Support fdb on master device the net/bridge default case */
2142 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2143 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2144 struct net_device *master = dev->master;
2146 if (master->netdev_ops->ndo_fdb_del)
2147 err = master->netdev_ops->ndo_fdb_del(ndm, dev, addr);
2152 ndm->ndm_flags &= ~NTF_MASTER;
2155 /* Embedded bridge, macvlan, and any other device support */
2156 if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_del) {
2157 err = dev->netdev_ops->ndo_fdb_del(ndm, dev, addr);
2160 rtnl_fdb_notify(dev, addr, RTM_DELNEIGH);
2161 ndm->ndm_flags &= ~NTF_SELF;
2168 static int nlmsg_populate_fdb(struct sk_buff *skb,
2169 struct netlink_callback *cb,
2170 struct net_device *dev,
2172 struct netdev_hw_addr_list *list)
2174 struct netdev_hw_addr *ha;
2178 pid = NETLINK_CB(cb->skb).pid;
2179 seq = cb->nlh->nlmsg_seq;
2181 list_for_each_entry(ha, &list->list, list) {
2182 if (*idx < cb->args[0])
2185 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr,
2186 pid, seq, 0, NTF_SELF);
2196 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
2197 * @nlh: netlink message header
2200 * Default netdevice operation to dump the existing unicast address list.
2201 * Returns zero on success.
2203 int ndo_dflt_fdb_dump(struct sk_buff *skb,
2204 struct netlink_callback *cb,
2205 struct net_device *dev,
2210 netif_addr_lock_bh(dev);
2211 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2214 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2216 netif_addr_unlock_bh(dev);
2219 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2221 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2224 struct net *net = sock_net(skb->sk);
2225 struct net_device *dev;
2228 for_each_netdev_rcu(net, dev) {
2229 if (dev->priv_flags & IFF_BRIDGE_PORT) {
2230 struct net_device *master = dev->master;
2231 const struct net_device_ops *ops = master->netdev_ops;
2233 if (ops->ndo_fdb_dump)
2234 idx = ops->ndo_fdb_dump(skb, cb, dev, idx);
2237 if (dev->netdev_ops->ndo_fdb_dump)
2238 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, idx);
2246 /* Protected by RTNL sempahore. */
2247 static struct rtattr **rta_buf;
2248 static int rtattr_max;
2250 /* Process one rtnetlink message. */
2252 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
2254 struct net *net = sock_net(skb->sk);
2255 rtnl_doit_func doit;
2262 type = nlh->nlmsg_type;
2268 /* All the messages must have at least 1 byte length */
2269 if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg)))
2272 family = ((struct rtgenmsg *)NLMSG_DATA(nlh))->rtgen_family;
2276 if (kind != 2 && !capable(CAP_NET_ADMIN))
2279 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
2281 rtnl_dumpit_func dumpit;
2282 rtnl_calcit_func calcit;
2283 u16 min_dump_alloc = 0;
2285 dumpit = rtnl_get_dumpit(family, type);
2288 calcit = rtnl_get_calcit(family, type);
2290 min_dump_alloc = calcit(skb, nlh);
2295 struct netlink_dump_control c = {
2297 .min_dump_alloc = min_dump_alloc,
2299 err = netlink_dump_start(rtnl, skb, nlh, &c);
2305 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
2307 min_len = rtm_min[sz_idx];
2308 if (nlh->nlmsg_len < min_len)
2311 if (nlh->nlmsg_len > min_len) {
2312 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
2313 struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len);
2315 while (RTA_OK(attr, attrlen)) {
2316 unsigned int flavor = attr->rta_type;
2318 if (flavor > rta_max[sz_idx])
2320 rta_buf[flavor-1] = attr;
2322 attr = RTA_NEXT(attr, attrlen);
2326 doit = rtnl_get_doit(family, type);
2330 return doit(skb, nlh, (void *)&rta_buf[0]);
2333 static void rtnetlink_rcv(struct sk_buff *skb)
2336 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
2340 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
2342 struct net_device *dev = ptr;
2348 case NETDEV_POST_INIT:
2349 case NETDEV_REGISTER:
2351 case NETDEV_PRE_TYPE_CHANGE:
2352 case NETDEV_GOING_DOWN:
2353 case NETDEV_UNREGISTER:
2354 case NETDEV_UNREGISTER_BATCH:
2355 case NETDEV_RELEASE:
2359 rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
2365 static struct notifier_block rtnetlink_dev_notifier = {
2366 .notifier_call = rtnetlink_event,
2370 static int __net_init rtnetlink_net_init(struct net *net)
2373 struct netlink_kernel_cfg cfg = {
2374 .groups = RTNLGRP_MAX,
2375 .input = rtnetlink_rcv,
2376 .cb_mutex = &rtnl_mutex,
2379 sk = netlink_kernel_create(net, NETLINK_ROUTE, THIS_MODULE, &cfg);
2386 static void __net_exit rtnetlink_net_exit(struct net *net)
2388 netlink_kernel_release(net->rtnl);
2392 static struct pernet_operations rtnetlink_net_ops = {
2393 .init = rtnetlink_net_init,
2394 .exit = rtnetlink_net_exit,
2397 void __init rtnetlink_init(void)
2402 for (i = 0; i < ARRAY_SIZE(rta_max); i++)
2403 if (rta_max[i] > rtattr_max)
2404 rtattr_max = rta_max[i];
2405 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL);
2407 panic("rtnetlink_init: cannot allocate rta_buf\n");
2409 if (register_pernet_subsys(&rtnetlink_net_ops))
2410 panic("rtnetlink_init: cannot initialize rtnetlink\n");
2412 netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV);
2413 register_netdevice_notifier(&rtnetlink_dev_notifier);
2415 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
2416 rtnl_dump_ifinfo, rtnl_calcit);
2417 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
2418 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
2419 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
2421 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
2422 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
2424 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
2425 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
2426 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);