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/pci.h>
40 #include <asm/uaccess.h>
41 #include <asm/system.h>
43 #include <linux/inet.h>
44 #include <linux/netdevice.h>
46 #include <net/protocol.h>
48 #include <net/route.h>
51 #include <net/pkt_sched.h>
52 #include <net/fib_rules.h>
53 #include <net/rtnetlink.h>
54 #include <net/net_namespace.h>
58 rtnl_dumpit_func dumpit;
61 static DEFINE_MUTEX(rtnl_mutex);
65 mutex_lock(&rtnl_mutex);
67 EXPORT_SYMBOL(rtnl_lock);
69 void __rtnl_unlock(void)
71 mutex_unlock(&rtnl_mutex);
74 void rtnl_unlock(void)
76 /* This fellow will unlock it for us. */
79 EXPORT_SYMBOL(rtnl_unlock);
81 int rtnl_trylock(void)
83 return mutex_trylock(&rtnl_mutex);
85 EXPORT_SYMBOL(rtnl_trylock);
87 int rtnl_is_locked(void)
89 return mutex_is_locked(&rtnl_mutex);
91 EXPORT_SYMBOL(rtnl_is_locked);
93 #ifdef CONFIG_PROVE_LOCKING
94 int lockdep_rtnl_is_held(void)
96 return lockdep_is_held(&rtnl_mutex);
98 EXPORT_SYMBOL(lockdep_rtnl_is_held);
99 #endif /* #ifdef CONFIG_PROVE_LOCKING */
101 static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
103 static inline int rtm_msgindex(int msgtype)
105 int msgindex = msgtype - RTM_BASE;
108 * msgindex < 0 implies someone tried to register a netlink
109 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
110 * the message type has not been added to linux/rtnetlink.h
112 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
117 static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
119 struct rtnl_link *tab;
121 if (protocol <= RTNL_FAMILY_MAX)
122 tab = rtnl_msg_handlers[protocol];
126 if (tab == NULL || tab[msgindex].doit == NULL)
127 tab = rtnl_msg_handlers[PF_UNSPEC];
129 return tab ? tab[msgindex].doit : NULL;
132 static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
134 struct rtnl_link *tab;
136 if (protocol <= RTNL_FAMILY_MAX)
137 tab = rtnl_msg_handlers[protocol];
141 if (tab == NULL || tab[msgindex].dumpit == NULL)
142 tab = rtnl_msg_handlers[PF_UNSPEC];
144 return tab ? tab[msgindex].dumpit : NULL;
148 * __rtnl_register - Register a rtnetlink message type
149 * @protocol: Protocol family or PF_UNSPEC
150 * @msgtype: rtnetlink message type
151 * @doit: Function pointer called for each request message
152 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
154 * Registers the specified function pointers (at least one of them has
155 * to be non-NULL) to be called whenever a request message for the
156 * specified protocol family and message type is received.
158 * The special protocol family PF_UNSPEC may be used to define fallback
159 * function pointers for the case when no entry for the specific protocol
162 * Returns 0 on success or a negative error code.
164 int __rtnl_register(int protocol, int msgtype,
165 rtnl_doit_func doit, rtnl_dumpit_func dumpit)
167 struct rtnl_link *tab;
170 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
171 msgindex = rtm_msgindex(msgtype);
173 tab = rtnl_msg_handlers[protocol];
175 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
179 rtnl_msg_handlers[protocol] = tab;
183 tab[msgindex].doit = doit;
186 tab[msgindex].dumpit = dumpit;
190 EXPORT_SYMBOL_GPL(__rtnl_register);
193 * rtnl_register - Register a rtnetlink message type
195 * Identical to __rtnl_register() but panics on failure. This is useful
196 * as failure of this function is very unlikely, it can only happen due
197 * to lack of memory when allocating the chain to store all message
198 * handlers for a protocol. Meant for use in init functions where lack
199 * of memory implies no sense in continueing.
201 void rtnl_register(int protocol, int msgtype,
202 rtnl_doit_func doit, rtnl_dumpit_func dumpit)
204 if (__rtnl_register(protocol, msgtype, doit, dumpit) < 0)
205 panic("Unable to register rtnetlink message handler, "
206 "protocol = %d, message type = %d\n",
209 EXPORT_SYMBOL_GPL(rtnl_register);
212 * rtnl_unregister - Unregister a rtnetlink message type
213 * @protocol: Protocol family or PF_UNSPEC
214 * @msgtype: rtnetlink message type
216 * Returns 0 on success or a negative error code.
218 int rtnl_unregister(int protocol, int msgtype)
222 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
223 msgindex = rtm_msgindex(msgtype);
225 if (rtnl_msg_handlers[protocol] == NULL)
228 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
229 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
233 EXPORT_SYMBOL_GPL(rtnl_unregister);
236 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
237 * @protocol : Protocol family or PF_UNSPEC
239 * Identical to calling rtnl_unregster() for all registered message types
240 * of a certain protocol family.
242 void rtnl_unregister_all(int protocol)
244 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
246 kfree(rtnl_msg_handlers[protocol]);
247 rtnl_msg_handlers[protocol] = NULL;
249 EXPORT_SYMBOL_GPL(rtnl_unregister_all);
251 static LIST_HEAD(link_ops);
254 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
255 * @ops: struct rtnl_link_ops * to register
257 * The caller must hold the rtnl_mutex. This function should be used
258 * by drivers that create devices during module initialization. It
259 * must be called before registering the devices.
261 * Returns 0 on success or a negative error code.
263 int __rtnl_link_register(struct rtnl_link_ops *ops)
266 ops->dellink = unregister_netdevice_queue;
268 list_add_tail(&ops->list, &link_ops);
271 EXPORT_SYMBOL_GPL(__rtnl_link_register);
274 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
275 * @ops: struct rtnl_link_ops * to register
277 * Returns 0 on success or a negative error code.
279 int rtnl_link_register(struct rtnl_link_ops *ops)
284 err = __rtnl_link_register(ops);
288 EXPORT_SYMBOL_GPL(rtnl_link_register);
290 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
292 struct net_device *dev;
293 LIST_HEAD(list_kill);
295 for_each_netdev(net, dev) {
296 if (dev->rtnl_link_ops == ops)
297 ops->dellink(dev, &list_kill);
299 unregister_netdevice_many(&list_kill);
303 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
304 * @ops: struct rtnl_link_ops * to unregister
306 * The caller must hold the rtnl_mutex.
308 void __rtnl_link_unregister(struct rtnl_link_ops *ops)
313 __rtnl_kill_links(net, ops);
315 list_del(&ops->list);
317 EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
320 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
321 * @ops: struct rtnl_link_ops * to unregister
323 void rtnl_link_unregister(struct rtnl_link_ops *ops)
326 __rtnl_link_unregister(ops);
329 EXPORT_SYMBOL_GPL(rtnl_link_unregister);
331 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
333 const struct rtnl_link_ops *ops;
335 list_for_each_entry(ops, &link_ops, list) {
336 if (!strcmp(ops->kind, kind))
342 static size_t rtnl_link_get_size(const struct net_device *dev)
344 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
350 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
351 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
354 /* IFLA_INFO_DATA + nested data */
355 size += nla_total_size(sizeof(struct nlattr)) +
358 if (ops->get_xstats_size)
359 /* IFLA_INFO_XSTATS */
360 size += nla_total_size(ops->get_xstats_size(dev));
365 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
367 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
368 struct nlattr *linkinfo, *data;
371 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
372 if (linkinfo == NULL)
375 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
376 goto err_cancel_link;
377 if (ops->fill_xstats) {
378 err = ops->fill_xstats(skb, dev);
380 goto err_cancel_link;
382 if (ops->fill_info) {
383 data = nla_nest_start(skb, IFLA_INFO_DATA);
385 goto err_cancel_link;
386 err = ops->fill_info(skb, dev);
388 goto err_cancel_data;
389 nla_nest_end(skb, data);
392 nla_nest_end(skb, linkinfo);
396 nla_nest_cancel(skb, data);
398 nla_nest_cancel(skb, linkinfo);
403 static const int rtm_min[RTM_NR_FAMILIES] =
405 [RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
406 [RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)),
407 [RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)),
408 [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)),
409 [RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
410 [RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
411 [RTM_FAM(RTM_NEWTFILTER)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
412 [RTM_FAM(RTM_NEWACTION)] = NLMSG_LENGTH(sizeof(struct tcamsg)),
413 [RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
414 [RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
417 static const int rta_max[RTM_NR_FAMILIES] =
419 [RTM_FAM(RTM_NEWLINK)] = IFLA_MAX,
420 [RTM_FAM(RTM_NEWADDR)] = IFA_MAX,
421 [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX,
422 [RTM_FAM(RTM_NEWRULE)] = FRA_MAX,
423 [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX,
424 [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX,
425 [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX,
426 [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX,
429 void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data)
432 int size = RTA_LENGTH(attrlen);
434 rta = (struct rtattr *)skb_put(skb, RTA_ALIGN(size));
435 rta->rta_type = attrtype;
437 memcpy(RTA_DATA(rta), data, attrlen);
438 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
440 EXPORT_SYMBOL(__rta_fill);
442 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned group, int echo)
444 struct sock *rtnl = net->rtnl;
447 NETLINK_CB(skb).dst_group = group;
449 atomic_inc(&skb->users);
450 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
452 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
456 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
458 struct sock *rtnl = net->rtnl;
460 return nlmsg_unicast(rtnl, skb, pid);
462 EXPORT_SYMBOL(rtnl_unicast);
464 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
465 struct nlmsghdr *nlh, gfp_t flags)
467 struct sock *rtnl = net->rtnl;
471 report = nlmsg_report(nlh);
473 nlmsg_notify(rtnl, skb, pid, group, report, flags);
475 EXPORT_SYMBOL(rtnl_notify);
477 void rtnl_set_sk_err(struct net *net, u32 group, int error)
479 struct sock *rtnl = net->rtnl;
481 netlink_set_err(rtnl, 0, group, error);
483 EXPORT_SYMBOL(rtnl_set_sk_err);
485 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
490 mx = nla_nest_start(skb, RTA_METRICS);
494 for (i = 0; i < RTAX_MAX; i++) {
497 NLA_PUT_U32(skb, i+1, metrics[i]);
502 nla_nest_cancel(skb, mx);
506 return nla_nest_end(skb, mx);
509 nla_nest_cancel(skb, mx);
512 EXPORT_SYMBOL(rtnetlink_put_metrics);
514 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
515 u32 ts, u32 tsage, long expires, u32 error)
517 struct rta_cacheinfo ci = {
518 .rta_lastuse = jiffies_to_clock_t(jiffies - dst->lastuse),
519 .rta_used = dst->__use,
520 .rta_clntref = atomic_read(&(dst->__refcnt)),
528 ci.rta_expires = jiffies_to_clock_t(expires);
530 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
532 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
534 static void set_operstate(struct net_device *dev, unsigned char transition)
536 unsigned char operstate = dev->operstate;
538 switch (transition) {
540 if ((operstate == IF_OPER_DORMANT ||
541 operstate == IF_OPER_UNKNOWN) &&
543 operstate = IF_OPER_UP;
546 case IF_OPER_DORMANT:
547 if (operstate == IF_OPER_UP ||
548 operstate == IF_OPER_UNKNOWN)
549 operstate = IF_OPER_DORMANT;
553 if (dev->operstate != operstate) {
554 write_lock_bh(&dev_base_lock);
555 dev->operstate = operstate;
556 write_unlock_bh(&dev_base_lock);
557 netdev_state_change(dev);
561 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
562 const struct ifinfomsg *ifm)
564 unsigned int flags = ifm->ifi_flags;
566 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
568 flags = (flags & ifm->ifi_change) |
569 (dev->flags & ~ifm->ifi_change);
574 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
575 const struct rtnl_link_stats64 *b)
577 a->rx_packets = b->rx_packets;
578 a->tx_packets = b->tx_packets;
579 a->rx_bytes = b->rx_bytes;
580 a->tx_bytes = b->tx_bytes;
581 a->rx_errors = b->rx_errors;
582 a->tx_errors = b->tx_errors;
583 a->rx_dropped = b->rx_dropped;
584 a->tx_dropped = b->tx_dropped;
586 a->multicast = b->multicast;
587 a->collisions = b->collisions;
589 a->rx_length_errors = b->rx_length_errors;
590 a->rx_over_errors = b->rx_over_errors;
591 a->rx_crc_errors = b->rx_crc_errors;
592 a->rx_frame_errors = b->rx_frame_errors;
593 a->rx_fifo_errors = b->rx_fifo_errors;
594 a->rx_missed_errors = b->rx_missed_errors;
596 a->tx_aborted_errors = b->tx_aborted_errors;
597 a->tx_carrier_errors = b->tx_carrier_errors;
598 a->tx_fifo_errors = b->tx_fifo_errors;
599 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
600 a->tx_window_errors = b->tx_window_errors;
602 a->rx_compressed = b->rx_compressed;
603 a->tx_compressed = b->tx_compressed;
606 static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
608 memcpy(v, b, sizeof(*b));
612 static inline int rtnl_vfinfo_size(const struct net_device *dev)
614 if (dev->dev.parent && dev_is_pci(dev->dev.parent)) {
616 int num_vfs = dev_num_vf(dev->dev.parent);
617 size_t size = nla_total_size(sizeof(struct nlattr));
618 size += nla_total_size(num_vfs * sizeof(struct nlattr));
620 (nla_total_size(sizeof(struct ifla_vf_mac)) +
621 nla_total_size(sizeof(struct ifla_vf_vlan)) +
622 nla_total_size(sizeof(struct ifla_vf_tx_rate)));
628 static size_t rtnl_port_size(const struct net_device *dev)
630 size_t port_size = nla_total_size(4) /* PORT_VF */
631 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
632 + nla_total_size(sizeof(struct ifla_port_vsi))
634 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
635 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
636 + nla_total_size(1) /* PROT_VDP_REQUEST */
637 + nla_total_size(2); /* PORT_VDP_RESPONSE */
638 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
639 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
641 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
644 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
646 if (dev_num_vf(dev->dev.parent))
647 return port_self_size + vf_ports_size +
648 vf_port_size * dev_num_vf(dev->dev.parent);
650 return port_self_size;
653 static noinline size_t if_nlmsg_size(const struct net_device *dev)
655 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
656 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
657 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
658 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
659 + nla_total_size(sizeof(struct rtnl_link_ifmap))
660 + nla_total_size(sizeof(struct rtnl_link_stats))
661 + nla_total_size(sizeof(struct rtnl_link_stats64))
662 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
663 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
664 + nla_total_size(4) /* IFLA_TXQLEN */
665 + nla_total_size(4) /* IFLA_WEIGHT */
666 + nla_total_size(4) /* IFLA_MTU */
667 + nla_total_size(4) /* IFLA_LINK */
668 + nla_total_size(4) /* IFLA_MASTER */
669 + nla_total_size(1) /* IFLA_OPERSTATE */
670 + nla_total_size(1) /* IFLA_LINKMODE */
671 + nla_total_size(4) /* IFLA_NUM_VF */
672 + rtnl_vfinfo_size(dev) /* IFLA_VFINFO_LIST */
673 + rtnl_port_size(dev) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
674 + rtnl_link_get_size(dev); /* IFLA_LINKINFO */
677 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
679 struct nlattr *vf_ports;
680 struct nlattr *vf_port;
684 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
688 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
689 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
691 goto nla_put_failure;
692 NLA_PUT_U32(skb, IFLA_PORT_VF, vf);
693 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
694 if (err == -EMSGSIZE)
695 goto nla_put_failure;
697 nla_nest_cancel(skb, vf_port);
700 nla_nest_end(skb, vf_port);
703 nla_nest_end(skb, vf_ports);
708 nla_nest_cancel(skb, vf_ports);
712 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
714 struct nlattr *port_self;
717 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
721 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
723 nla_nest_cancel(skb, port_self);
724 return (err == -EMSGSIZE) ? err : 0;
727 nla_nest_end(skb, port_self);
732 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev)
736 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
739 err = rtnl_port_self_fill(skb, dev);
743 if (dev_num_vf(dev->dev.parent)) {
744 err = rtnl_vf_ports_fill(skb, dev);
752 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
753 int type, u32 pid, u32 seq, u32 change,
756 struct ifinfomsg *ifm;
757 struct nlmsghdr *nlh;
758 struct rtnl_link_stats64 temp;
759 const struct rtnl_link_stats64 *stats;
762 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
766 ifm = nlmsg_data(nlh);
767 ifm->ifi_family = AF_UNSPEC;
769 ifm->ifi_type = dev->type;
770 ifm->ifi_index = dev->ifindex;
771 ifm->ifi_flags = dev_get_flags(dev);
772 ifm->ifi_change = change;
774 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
775 NLA_PUT_U32(skb, IFLA_TXQLEN, dev->tx_queue_len);
776 NLA_PUT_U8(skb, IFLA_OPERSTATE,
777 netif_running(dev) ? dev->operstate : IF_OPER_DOWN);
778 NLA_PUT_U8(skb, IFLA_LINKMODE, dev->link_mode);
779 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
781 if (dev->ifindex != dev->iflink)
782 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
785 NLA_PUT_U32(skb, IFLA_MASTER, dev->master->ifindex);
788 NLA_PUT_STRING(skb, IFLA_QDISC, dev->qdisc->ops->id);
791 NLA_PUT_STRING(skb, IFLA_IFALIAS, dev->ifalias);
794 struct rtnl_link_ifmap map = {
795 .mem_start = dev->mem_start,
796 .mem_end = dev->mem_end,
797 .base_addr = dev->base_addr,
800 .port = dev->if_port,
802 NLA_PUT(skb, IFLA_MAP, sizeof(map), &map);
806 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
807 NLA_PUT(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast);
810 attr = nla_reserve(skb, IFLA_STATS,
811 sizeof(struct rtnl_link_stats));
813 goto nla_put_failure;
815 stats = dev_get_stats(dev, &temp);
816 copy_rtnl_link_stats(nla_data(attr), stats);
818 attr = nla_reserve(skb, IFLA_STATS64,
819 sizeof(struct rtnl_link_stats64));
821 goto nla_put_failure;
822 copy_rtnl_link_stats64(nla_data(attr), stats);
825 NLA_PUT_U32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent));
827 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent) {
830 struct nlattr *vfinfo, *vf;
831 int num_vfs = dev_num_vf(dev->dev.parent);
833 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
835 goto nla_put_failure;
836 for (i = 0; i < num_vfs; i++) {
837 struct ifla_vf_info ivi;
838 struct ifla_vf_mac vf_mac;
839 struct ifla_vf_vlan vf_vlan;
840 struct ifla_vf_tx_rate vf_tx_rate;
841 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
843 vf_mac.vf = vf_vlan.vf = vf_tx_rate.vf = ivi.vf;
844 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
845 vf_vlan.vlan = ivi.vlan;
846 vf_vlan.qos = ivi.qos;
847 vf_tx_rate.rate = ivi.tx_rate;
848 vf = nla_nest_start(skb, IFLA_VF_INFO);
850 nla_nest_cancel(skb, vfinfo);
851 goto nla_put_failure;
853 NLA_PUT(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac);
854 NLA_PUT(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan);
855 NLA_PUT(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate), &vf_tx_rate);
856 nla_nest_end(skb, vf);
858 nla_nest_end(skb, vfinfo);
861 if (rtnl_port_fill(skb, dev))
862 goto nla_put_failure;
864 if (dev->rtnl_link_ops) {
865 if (rtnl_link_fill(skb, dev) < 0)
866 goto nla_put_failure;
869 return nlmsg_end(skb, nlh);
872 nlmsg_cancel(skb, nlh);
876 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
878 struct net *net = sock_net(skb->sk);
881 struct net_device *dev;
882 struct hlist_head *head;
883 struct hlist_node *node;
888 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
890 head = &net->dev_index_head[h];
891 hlist_for_each_entry(dev, node, head, index_hlist) {
894 if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
895 NETLINK_CB(cb->skb).pid,
896 cb->nlh->nlmsg_seq, 0,
910 const struct nla_policy ifla_policy[IFLA_MAX+1] = {
911 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
912 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
913 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
914 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
915 [IFLA_MTU] = { .type = NLA_U32 },
916 [IFLA_LINK] = { .type = NLA_U32 },
917 [IFLA_TXQLEN] = { .type = NLA_U32 },
918 [IFLA_WEIGHT] = { .type = NLA_U32 },
919 [IFLA_OPERSTATE] = { .type = NLA_U8 },
920 [IFLA_LINKMODE] = { .type = NLA_U8 },
921 [IFLA_LINKINFO] = { .type = NLA_NESTED },
922 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
923 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
924 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
925 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
926 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
928 EXPORT_SYMBOL(ifla_policy);
930 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
931 [IFLA_INFO_KIND] = { .type = NLA_STRING },
932 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
935 static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
936 [IFLA_VF_INFO] = { .type = NLA_NESTED },
939 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
940 [IFLA_VF_MAC] = { .type = NLA_BINARY,
941 .len = sizeof(struct ifla_vf_mac) },
942 [IFLA_VF_VLAN] = { .type = NLA_BINARY,
943 .len = sizeof(struct ifla_vf_vlan) },
944 [IFLA_VF_TX_RATE] = { .type = NLA_BINARY,
945 .len = sizeof(struct ifla_vf_tx_rate) },
948 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
949 [IFLA_PORT_VF] = { .type = NLA_U32 },
950 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
951 .len = PORT_PROFILE_MAX },
952 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
953 .len = sizeof(struct ifla_port_vsi)},
954 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
955 .len = PORT_UUID_MAX },
956 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
957 .len = PORT_UUID_MAX },
958 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
959 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
962 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
965 /* Examine the link attributes and figure out which
966 * network namespace we are talking about.
968 if (tb[IFLA_NET_NS_PID])
969 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
971 net = get_net(src_net);
974 EXPORT_SYMBOL(rtnl_link_get_net);
976 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
979 if (tb[IFLA_ADDRESS] &&
980 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
983 if (tb[IFLA_BROADCAST] &&
984 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
991 static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
993 int rem, err = -EINVAL;
995 const struct net_device_ops *ops = dev->netdev_ops;
997 nla_for_each_nested(vf, attr, rem) {
998 switch (nla_type(vf)) {
1000 struct ifla_vf_mac *ivm;
1003 if (ops->ndo_set_vf_mac)
1004 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1008 case IFLA_VF_VLAN: {
1009 struct ifla_vf_vlan *ivv;
1012 if (ops->ndo_set_vf_vlan)
1013 err = ops->ndo_set_vf_vlan(dev, ivv->vf,
1018 case IFLA_VF_TX_RATE: {
1019 struct ifla_vf_tx_rate *ivt;
1022 if (ops->ndo_set_vf_tx_rate)
1023 err = ops->ndo_set_vf_tx_rate(dev, ivt->vf,
1037 static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
1038 struct nlattr **tb, char *ifname, int modified)
1040 const struct net_device_ops *ops = dev->netdev_ops;
1041 int send_addr_notify = 0;
1044 if (tb[IFLA_NET_NS_PID]) {
1045 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1050 err = dev_change_net_namespace(dev, net, ifname);
1058 struct rtnl_link_ifmap *u_map;
1061 if (!ops->ndo_set_config) {
1066 if (!netif_device_present(dev)) {
1071 u_map = nla_data(tb[IFLA_MAP]);
1072 k_map.mem_start = (unsigned long) u_map->mem_start;
1073 k_map.mem_end = (unsigned long) u_map->mem_end;
1074 k_map.base_addr = (unsigned short) u_map->base_addr;
1075 k_map.irq = (unsigned char) u_map->irq;
1076 k_map.dma = (unsigned char) u_map->dma;
1077 k_map.port = (unsigned char) u_map->port;
1079 err = ops->ndo_set_config(dev, &k_map);
1086 if (tb[IFLA_ADDRESS]) {
1087 struct sockaddr *sa;
1090 if (!ops->ndo_set_mac_address) {
1095 if (!netif_device_present(dev)) {
1100 len = sizeof(sa_family_t) + dev->addr_len;
1101 sa = kmalloc(len, GFP_KERNEL);
1106 sa->sa_family = dev->type;
1107 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1109 err = ops->ndo_set_mac_address(dev, sa);
1113 send_addr_notify = 1;
1118 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1125 * Interface selected by interface index but interface
1126 * name provided implies that a name change has been
1129 if (ifm->ifi_index > 0 && ifname[0]) {
1130 err = dev_change_name(dev, ifname);
1136 if (tb[IFLA_IFALIAS]) {
1137 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1138 nla_len(tb[IFLA_IFALIAS]));
1144 if (tb[IFLA_BROADCAST]) {
1145 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1146 send_addr_notify = 1;
1149 if (ifm->ifi_flags || ifm->ifi_change) {
1150 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1155 if (tb[IFLA_TXQLEN])
1156 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1158 if (tb[IFLA_OPERSTATE])
1159 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1161 if (tb[IFLA_LINKMODE]) {
1162 write_lock_bh(&dev_base_lock);
1163 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1164 write_unlock_bh(&dev_base_lock);
1167 if (tb[IFLA_VFINFO_LIST]) {
1168 struct nlattr *attr;
1170 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
1171 if (nla_type(attr) != IFLA_VF_INFO) {
1175 err = do_setvfinfo(dev, attr);
1183 if (tb[IFLA_VF_PORTS]) {
1184 struct nlattr *port[IFLA_PORT_MAX+1];
1185 struct nlattr *attr;
1190 if (!ops->ndo_set_vf_port)
1193 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1194 if (nla_type(attr) != IFLA_VF_PORT)
1196 err = nla_parse_nested(port, IFLA_PORT_MAX,
1197 attr, ifla_port_policy);
1200 if (!port[IFLA_PORT_VF]) {
1204 vf = nla_get_u32(port[IFLA_PORT_VF]);
1205 err = ops->ndo_set_vf_port(dev, vf, port);
1213 if (tb[IFLA_PORT_SELF]) {
1214 struct nlattr *port[IFLA_PORT_MAX+1];
1216 err = nla_parse_nested(port, IFLA_PORT_MAX,
1217 tb[IFLA_PORT_SELF], ifla_port_policy);
1222 if (ops->ndo_set_vf_port)
1223 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1231 if (err < 0 && modified && net_ratelimit())
1232 printk(KERN_WARNING "A link change request failed with "
1233 "some changes comitted already. Interface %s may "
1234 "have been left with an inconsistent configuration, "
1235 "please check.\n", dev->name);
1237 if (send_addr_notify)
1238 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1242 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1244 struct net *net = sock_net(skb->sk);
1245 struct ifinfomsg *ifm;
1246 struct net_device *dev;
1248 struct nlattr *tb[IFLA_MAX+1];
1249 char ifname[IFNAMSIZ];
1251 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1255 if (tb[IFLA_IFNAME])
1256 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1261 ifm = nlmsg_data(nlh);
1262 if (ifm->ifi_index > 0)
1263 dev = __dev_get_by_index(net, ifm->ifi_index);
1264 else if (tb[IFLA_IFNAME])
1265 dev = __dev_get_by_name(net, ifname);
1274 err = validate_linkmsg(dev, tb);
1278 err = do_setlink(dev, ifm, tb, ifname, 0);
1283 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1285 struct net *net = sock_net(skb->sk);
1286 const struct rtnl_link_ops *ops;
1287 struct net_device *dev;
1288 struct ifinfomsg *ifm;
1289 char ifname[IFNAMSIZ];
1290 struct nlattr *tb[IFLA_MAX+1];
1293 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1297 if (tb[IFLA_IFNAME])
1298 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1300 ifm = nlmsg_data(nlh);
1301 if (ifm->ifi_index > 0)
1302 dev = __dev_get_by_index(net, ifm->ifi_index);
1303 else if (tb[IFLA_IFNAME])
1304 dev = __dev_get_by_name(net, ifname);
1311 ops = dev->rtnl_link_ops;
1315 ops->dellink(dev, NULL);
1319 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
1321 unsigned int old_flags;
1324 old_flags = dev->flags;
1325 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
1326 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1331 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
1332 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U);
1334 __dev_notify_flags(dev, old_flags);
1337 EXPORT_SYMBOL(rtnl_configure_link);
1339 struct net_device *rtnl_create_link(struct net *src_net, struct net *net,
1340 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
1343 struct net_device *dev;
1344 unsigned int num_queues = 1;
1345 unsigned int real_num_queues = 1;
1347 if (ops->get_tx_queues) {
1348 err = ops->get_tx_queues(src_net, tb, &num_queues,
1354 dev = alloc_netdev_mq(ops->priv_size, ifname, ops->setup, num_queues);
1358 dev_net_set(dev, net);
1359 dev->rtnl_link_ops = ops;
1360 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
1361 dev->real_num_tx_queues = real_num_queues;
1363 if (strchr(dev->name, '%')) {
1364 err = dev_alloc_name(dev, dev->name);
1370 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
1371 if (tb[IFLA_ADDRESS])
1372 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
1373 nla_len(tb[IFLA_ADDRESS]));
1374 if (tb[IFLA_BROADCAST])
1375 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
1376 nla_len(tb[IFLA_BROADCAST]));
1377 if (tb[IFLA_TXQLEN])
1378 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1379 if (tb[IFLA_OPERSTATE])
1380 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1381 if (tb[IFLA_LINKMODE])
1382 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1389 return ERR_PTR(err);
1391 EXPORT_SYMBOL(rtnl_create_link);
1393 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1395 struct net *net = sock_net(skb->sk);
1396 const struct rtnl_link_ops *ops;
1397 struct net_device *dev;
1398 struct ifinfomsg *ifm;
1399 char kind[MODULE_NAME_LEN];
1400 char ifname[IFNAMSIZ];
1401 struct nlattr *tb[IFLA_MAX+1];
1402 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
1405 #ifdef CONFIG_MODULES
1408 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1412 if (tb[IFLA_IFNAME])
1413 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1417 ifm = nlmsg_data(nlh);
1418 if (ifm->ifi_index > 0)
1419 dev = __dev_get_by_index(net, ifm->ifi_index);
1421 dev = __dev_get_by_name(net, ifname);
1425 err = validate_linkmsg(dev, tb);
1429 if (tb[IFLA_LINKINFO]) {
1430 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
1431 tb[IFLA_LINKINFO], ifla_info_policy);
1435 memset(linkinfo, 0, sizeof(linkinfo));
1437 if (linkinfo[IFLA_INFO_KIND]) {
1438 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
1439 ops = rtnl_link_ops_get(kind);
1446 struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL;
1447 struct net *dest_net;
1450 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
1451 err = nla_parse_nested(attr, ops->maxtype,
1452 linkinfo[IFLA_INFO_DATA],
1458 if (ops->validate) {
1459 err = ops->validate(tb, data);
1468 if (nlh->nlmsg_flags & NLM_F_EXCL)
1470 if (nlh->nlmsg_flags & NLM_F_REPLACE)
1473 if (linkinfo[IFLA_INFO_DATA]) {
1474 if (!ops || ops != dev->rtnl_link_ops ||
1478 err = ops->changelink(dev, tb, data);
1484 return do_setlink(dev, ifm, tb, ifname, modified);
1487 if (!(nlh->nlmsg_flags & NLM_F_CREATE))
1492 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
1496 #ifdef CONFIG_MODULES
1499 request_module("rtnl-link-%s", kind);
1501 ops = rtnl_link_ops_get(kind);
1510 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
1512 dest_net = rtnl_link_get_net(net, tb);
1513 dev = rtnl_create_link(net, dest_net, ifname, ops, tb);
1517 else if (ops->newlink)
1518 err = ops->newlink(net, dev, tb, data);
1520 err = register_netdevice(dev);
1522 if (err < 0 && !IS_ERR(dev))
1527 err = rtnl_configure_link(dev, ifm);
1529 unregister_netdevice(dev);
1536 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
1538 struct net *net = sock_net(skb->sk);
1539 struct ifinfomsg *ifm;
1540 char ifname[IFNAMSIZ];
1541 struct nlattr *tb[IFLA_MAX+1];
1542 struct net_device *dev = NULL;
1543 struct sk_buff *nskb;
1546 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1550 if (tb[IFLA_IFNAME])
1551 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1553 ifm = nlmsg_data(nlh);
1554 if (ifm->ifi_index > 0)
1555 dev = __dev_get_by_index(net, ifm->ifi_index);
1556 else if (tb[IFLA_IFNAME])
1557 dev = __dev_get_by_name(net, ifname);
1564 nskb = nlmsg_new(if_nlmsg_size(dev), GFP_KERNEL);
1568 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).pid,
1569 nlh->nlmsg_seq, 0, 0);
1571 /* -EMSGSIZE implies BUG in if_nlmsg_size */
1572 WARN_ON(err == -EMSGSIZE);
1575 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).pid);
1580 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1583 int s_idx = cb->family;
1587 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1588 int type = cb->nlh->nlmsg_type-RTM_BASE;
1589 if (idx < s_idx || idx == PF_PACKET)
1591 if (rtnl_msg_handlers[idx] == NULL ||
1592 rtnl_msg_handlers[idx][type].dumpit == NULL)
1595 memset(&cb->args[0], 0, sizeof(cb->args));
1596 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1604 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change)
1606 struct net *net = dev_net(dev);
1607 struct sk_buff *skb;
1610 skb = nlmsg_new(if_nlmsg_size(dev), GFP_KERNEL);
1614 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0);
1616 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
1617 WARN_ON(err == -EMSGSIZE);
1621 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
1625 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
1628 /* Protected by RTNL sempahore. */
1629 static struct rtattr **rta_buf;
1630 static int rtattr_max;
1632 /* Process one rtnetlink message. */
1634 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1636 struct net *net = sock_net(skb->sk);
1637 rtnl_doit_func doit;
1644 type = nlh->nlmsg_type;
1650 /* All the messages must have at least 1 byte length */
1651 if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg)))
1654 family = ((struct rtgenmsg *)NLMSG_DATA(nlh))->rtgen_family;
1658 if (kind != 2 && security_netlink_recv(skb, CAP_NET_ADMIN))
1661 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
1663 rtnl_dumpit_func dumpit;
1665 dumpit = rtnl_get_dumpit(family, type);
1671 err = netlink_dump_start(rtnl, skb, nlh, dumpit, NULL);
1676 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
1678 min_len = rtm_min[sz_idx];
1679 if (nlh->nlmsg_len < min_len)
1682 if (nlh->nlmsg_len > min_len) {
1683 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
1684 struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len);
1686 while (RTA_OK(attr, attrlen)) {
1687 unsigned flavor = attr->rta_type;
1689 if (flavor > rta_max[sz_idx])
1691 rta_buf[flavor-1] = attr;
1693 attr = RTA_NEXT(attr, attrlen);
1697 doit = rtnl_get_doit(family, type);
1701 return doit(skb, nlh, (void *)&rta_buf[0]);
1704 static void rtnetlink_rcv(struct sk_buff *skb)
1707 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
1711 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
1713 struct net_device *dev = ptr;
1719 case NETDEV_POST_INIT:
1720 case NETDEV_REGISTER:
1722 case NETDEV_PRE_TYPE_CHANGE:
1723 case NETDEV_GOING_DOWN:
1724 case NETDEV_UNREGISTER:
1725 case NETDEV_UNREGISTER_BATCH:
1728 rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
1734 static struct notifier_block rtnetlink_dev_notifier = {
1735 .notifier_call = rtnetlink_event,
1739 static int __net_init rtnetlink_net_init(struct net *net)
1742 sk = netlink_kernel_create(net, NETLINK_ROUTE, RTNLGRP_MAX,
1743 rtnetlink_rcv, &rtnl_mutex, THIS_MODULE);
1750 static void __net_exit rtnetlink_net_exit(struct net *net)
1752 netlink_kernel_release(net->rtnl);
1756 static struct pernet_operations rtnetlink_net_ops = {
1757 .init = rtnetlink_net_init,
1758 .exit = rtnetlink_net_exit,
1761 void __init rtnetlink_init(void)
1766 for (i = 0; i < ARRAY_SIZE(rta_max); i++)
1767 if (rta_max[i] > rtattr_max)
1768 rtattr_max = rta_max[i];
1769 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL);
1771 panic("rtnetlink_init: cannot allocate rta_buf\n");
1773 if (register_pernet_subsys(&rtnetlink_net_ops))
1774 panic("rtnetlink_init: cannot initialize rtnetlink\n");
1776 netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV);
1777 register_netdevice_notifier(&rtnetlink_dev_notifier);
1779 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, rtnl_dump_ifinfo);
1780 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL);
1781 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL);
1782 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL);
1784 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all);
1785 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all);