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);
302 void rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
305 __rtnl_kill_links(net, ops);
308 EXPORT_SYMBOL_GPL(rtnl_kill_links);
311 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
312 * @ops: struct rtnl_link_ops * to unregister
314 * The caller must hold the rtnl_mutex.
316 void __rtnl_link_unregister(struct rtnl_link_ops *ops)
321 __rtnl_kill_links(net, ops);
323 list_del(&ops->list);
325 EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
328 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
329 * @ops: struct rtnl_link_ops * to unregister
331 void rtnl_link_unregister(struct rtnl_link_ops *ops)
334 __rtnl_link_unregister(ops);
337 EXPORT_SYMBOL_GPL(rtnl_link_unregister);
339 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
341 const struct rtnl_link_ops *ops;
343 list_for_each_entry(ops, &link_ops, list) {
344 if (!strcmp(ops->kind, kind))
350 static size_t rtnl_link_get_size(const struct net_device *dev)
352 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
358 size = nlmsg_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
359 nlmsg_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
362 /* IFLA_INFO_DATA + nested data */
363 size += nlmsg_total_size(sizeof(struct nlattr)) +
366 if (ops->get_xstats_size)
367 size += ops->get_xstats_size(dev); /* IFLA_INFO_XSTATS */
372 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
374 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
375 struct nlattr *linkinfo, *data;
378 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
379 if (linkinfo == NULL)
382 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
383 goto err_cancel_link;
384 if (ops->fill_xstats) {
385 err = ops->fill_xstats(skb, dev);
387 goto err_cancel_link;
389 if (ops->fill_info) {
390 data = nla_nest_start(skb, IFLA_INFO_DATA);
392 goto err_cancel_link;
393 err = ops->fill_info(skb, dev);
395 goto err_cancel_data;
396 nla_nest_end(skb, data);
399 nla_nest_end(skb, linkinfo);
403 nla_nest_cancel(skb, data);
405 nla_nest_cancel(skb, linkinfo);
410 static const int rtm_min[RTM_NR_FAMILIES] =
412 [RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
413 [RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)),
414 [RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)),
415 [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)),
416 [RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
417 [RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
418 [RTM_FAM(RTM_NEWTFILTER)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
419 [RTM_FAM(RTM_NEWACTION)] = NLMSG_LENGTH(sizeof(struct tcamsg)),
420 [RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
421 [RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
424 static const int rta_max[RTM_NR_FAMILIES] =
426 [RTM_FAM(RTM_NEWLINK)] = IFLA_MAX,
427 [RTM_FAM(RTM_NEWADDR)] = IFA_MAX,
428 [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX,
429 [RTM_FAM(RTM_NEWRULE)] = FRA_MAX,
430 [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX,
431 [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX,
432 [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX,
433 [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX,
436 void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data)
439 int size = RTA_LENGTH(attrlen);
441 rta = (struct rtattr *)skb_put(skb, RTA_ALIGN(size));
442 rta->rta_type = attrtype;
444 memcpy(RTA_DATA(rta), data, attrlen);
445 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
447 EXPORT_SYMBOL(__rta_fill);
449 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned group, int echo)
451 struct sock *rtnl = net->rtnl;
454 NETLINK_CB(skb).dst_group = group;
456 atomic_inc(&skb->users);
457 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
459 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
463 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
465 struct sock *rtnl = net->rtnl;
467 return nlmsg_unicast(rtnl, skb, pid);
469 EXPORT_SYMBOL(rtnl_unicast);
471 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
472 struct nlmsghdr *nlh, gfp_t flags)
474 struct sock *rtnl = net->rtnl;
478 report = nlmsg_report(nlh);
480 nlmsg_notify(rtnl, skb, pid, group, report, flags);
482 EXPORT_SYMBOL(rtnl_notify);
484 void rtnl_set_sk_err(struct net *net, u32 group, int error)
486 struct sock *rtnl = net->rtnl;
488 netlink_set_err(rtnl, 0, group, error);
490 EXPORT_SYMBOL(rtnl_set_sk_err);
492 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
497 mx = nla_nest_start(skb, RTA_METRICS);
501 for (i = 0; i < RTAX_MAX; i++) {
504 NLA_PUT_U32(skb, i+1, metrics[i]);
509 nla_nest_cancel(skb, mx);
513 return nla_nest_end(skb, mx);
516 nla_nest_cancel(skb, mx);
519 EXPORT_SYMBOL(rtnetlink_put_metrics);
521 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
522 u32 ts, u32 tsage, long expires, u32 error)
524 struct rta_cacheinfo ci = {
525 .rta_lastuse = jiffies_to_clock_t(jiffies - dst->lastuse),
526 .rta_used = dst->__use,
527 .rta_clntref = atomic_read(&(dst->__refcnt)),
535 ci.rta_expires = jiffies_to_clock_t(expires);
537 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
539 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
541 static void set_operstate(struct net_device *dev, unsigned char transition)
543 unsigned char operstate = dev->operstate;
545 switch (transition) {
547 if ((operstate == IF_OPER_DORMANT ||
548 operstate == IF_OPER_UNKNOWN) &&
550 operstate = IF_OPER_UP;
553 case IF_OPER_DORMANT:
554 if (operstate == IF_OPER_UP ||
555 operstate == IF_OPER_UNKNOWN)
556 operstate = IF_OPER_DORMANT;
560 if (dev->operstate != operstate) {
561 write_lock_bh(&dev_base_lock);
562 dev->operstate = operstate;
563 write_unlock_bh(&dev_base_lock);
564 netdev_state_change(dev);
568 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
569 const struct ifinfomsg *ifm)
571 unsigned int flags = ifm->ifi_flags;
573 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
575 flags = (flags & ifm->ifi_change) |
576 (dev->flags & ~ifm->ifi_change);
581 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
582 const struct net_device_stats *b)
584 a->rx_packets = b->rx_packets;
585 a->tx_packets = b->tx_packets;
586 a->rx_bytes = b->rx_bytes;
587 a->tx_bytes = b->tx_bytes;
588 a->rx_errors = b->rx_errors;
589 a->tx_errors = b->tx_errors;
590 a->rx_dropped = b->rx_dropped;
591 a->tx_dropped = b->tx_dropped;
593 a->multicast = b->multicast;
594 a->collisions = b->collisions;
596 a->rx_length_errors = b->rx_length_errors;
597 a->rx_over_errors = b->rx_over_errors;
598 a->rx_crc_errors = b->rx_crc_errors;
599 a->rx_frame_errors = b->rx_frame_errors;
600 a->rx_fifo_errors = b->rx_fifo_errors;
601 a->rx_missed_errors = b->rx_missed_errors;
603 a->tx_aborted_errors = b->tx_aborted_errors;
604 a->tx_carrier_errors = b->tx_carrier_errors;
605 a->tx_fifo_errors = b->tx_fifo_errors;
606 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
607 a->tx_window_errors = b->tx_window_errors;
609 a->rx_compressed = b->rx_compressed;
610 a->tx_compressed = b->tx_compressed;
613 static void copy_rtnl_link_stats64(void *v, const struct net_device_stats *b)
615 struct rtnl_link_stats64 a;
617 a.rx_packets = b->rx_packets;
618 a.tx_packets = b->tx_packets;
619 a.rx_bytes = b->rx_bytes;
620 a.tx_bytes = b->tx_bytes;
621 a.rx_errors = b->rx_errors;
622 a.tx_errors = b->tx_errors;
623 a.rx_dropped = b->rx_dropped;
624 a.tx_dropped = b->tx_dropped;
626 a.multicast = b->multicast;
627 a.collisions = b->collisions;
629 a.rx_length_errors = b->rx_length_errors;
630 a.rx_over_errors = b->rx_over_errors;
631 a.rx_crc_errors = b->rx_crc_errors;
632 a.rx_frame_errors = b->rx_frame_errors;
633 a.rx_fifo_errors = b->rx_fifo_errors;
634 a.rx_missed_errors = b->rx_missed_errors;
636 a.tx_aborted_errors = b->tx_aborted_errors;
637 a.tx_carrier_errors = b->tx_carrier_errors;
638 a.tx_fifo_errors = b->tx_fifo_errors;
639 a.tx_heartbeat_errors = b->tx_heartbeat_errors;
640 a.tx_window_errors = b->tx_window_errors;
642 a.rx_compressed = b->rx_compressed;
643 a.tx_compressed = b->tx_compressed;
644 memcpy(v, &a, sizeof(a));
648 static inline int rtnl_vfinfo_size(const struct net_device *dev)
650 if (dev->dev.parent && dev_is_pci(dev->dev.parent)) {
652 int num_vfs = dev_num_vf(dev->dev.parent);
653 size_t size = nlmsg_total_size(sizeof(struct nlattr));
654 size += nlmsg_total_size(num_vfs * sizeof(struct nlattr));
655 size += num_vfs * (sizeof(struct ifla_vf_mac) +
656 sizeof(struct ifla_vf_vlan) +
657 sizeof(struct ifla_vf_tx_rate));
663 static size_t rtnl_port_size(const struct net_device *dev)
665 size_t port_size = nla_total_size(4) /* PORT_VF */
666 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
667 + nla_total_size(sizeof(struct ifla_port_vsi))
669 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
670 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
671 + nla_total_size(1) /* PROT_VDP_REQUEST */
672 + nla_total_size(2); /* PORT_VDP_RESPONSE */
673 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
674 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
676 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
679 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
681 if (dev_num_vf(dev->dev.parent))
682 return port_self_size + vf_ports_size +
683 vf_port_size * dev_num_vf(dev->dev.parent);
685 return port_self_size;
688 static inline size_t if_nlmsg_size(const struct net_device *dev)
690 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
691 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
692 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
693 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
694 + nla_total_size(sizeof(struct rtnl_link_ifmap))
695 + nla_total_size(sizeof(struct rtnl_link_stats))
696 + nla_total_size(sizeof(struct rtnl_link_stats64))
697 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
698 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
699 + nla_total_size(4) /* IFLA_TXQLEN */
700 + nla_total_size(4) /* IFLA_WEIGHT */
701 + nla_total_size(4) /* IFLA_MTU */
702 + nla_total_size(4) /* IFLA_LINK */
703 + nla_total_size(4) /* IFLA_MASTER */
704 + nla_total_size(1) /* IFLA_OPERSTATE */
705 + nla_total_size(1) /* IFLA_LINKMODE */
706 + nla_total_size(4) /* IFLA_NUM_VF */
707 + rtnl_vfinfo_size(dev) /* IFLA_VFINFO_LIST */
708 + rtnl_port_size(dev) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
709 + rtnl_link_get_size(dev); /* IFLA_LINKINFO */
712 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
714 struct nlattr *vf_ports;
715 struct nlattr *vf_port;
719 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
723 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
724 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
726 nla_nest_cancel(skb, vf_ports);
729 NLA_PUT_U32(skb, IFLA_PORT_VF, vf);
730 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
733 nla_nest_cancel(skb, vf_port);
736 nla_nest_end(skb, vf_port);
739 nla_nest_end(skb, vf_ports);
744 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
746 struct nlattr *port_self;
749 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
753 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
755 nla_nest_cancel(skb, port_self);
759 nla_nest_end(skb, port_self);
764 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev)
768 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
771 err = rtnl_port_self_fill(skb, dev);
775 if (dev_num_vf(dev->dev.parent)) {
776 err = rtnl_vf_ports_fill(skb, dev);
784 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
785 int type, u32 pid, u32 seq, u32 change,
788 struct ifinfomsg *ifm;
789 struct nlmsghdr *nlh;
790 const struct net_device_stats *stats;
793 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
797 ifm = nlmsg_data(nlh);
798 ifm->ifi_family = AF_UNSPEC;
800 ifm->ifi_type = dev->type;
801 ifm->ifi_index = dev->ifindex;
802 ifm->ifi_flags = dev_get_flags(dev);
803 ifm->ifi_change = change;
805 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
806 NLA_PUT_U32(skb, IFLA_TXQLEN, dev->tx_queue_len);
807 NLA_PUT_U8(skb, IFLA_OPERSTATE,
808 netif_running(dev) ? dev->operstate : IF_OPER_DOWN);
809 NLA_PUT_U8(skb, IFLA_LINKMODE, dev->link_mode);
810 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
812 if (dev->ifindex != dev->iflink)
813 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
816 NLA_PUT_U32(skb, IFLA_MASTER, dev->master->ifindex);
819 NLA_PUT_STRING(skb, IFLA_QDISC, dev->qdisc->ops->id);
822 NLA_PUT_STRING(skb, IFLA_IFALIAS, dev->ifalias);
825 struct rtnl_link_ifmap map = {
826 .mem_start = dev->mem_start,
827 .mem_end = dev->mem_end,
828 .base_addr = dev->base_addr,
831 .port = dev->if_port,
833 NLA_PUT(skb, IFLA_MAP, sizeof(map), &map);
837 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
838 NLA_PUT(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast);
841 attr = nla_reserve(skb, IFLA_STATS,
842 sizeof(struct rtnl_link_stats));
844 goto nla_put_failure;
846 stats = dev_get_stats(dev);
847 copy_rtnl_link_stats(nla_data(attr), stats);
849 attr = nla_reserve(skb, IFLA_STATS64,
850 sizeof(struct rtnl_link_stats64));
852 goto nla_put_failure;
853 copy_rtnl_link_stats64(nla_data(attr), stats);
856 NLA_PUT_U32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent));
858 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent) {
861 struct nlattr *vfinfo, *vf;
862 int num_vfs = dev_num_vf(dev->dev.parent);
864 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
866 goto nla_put_failure;
867 for (i = 0; i < num_vfs; i++) {
868 struct ifla_vf_info ivi;
869 struct ifla_vf_mac vf_mac;
870 struct ifla_vf_vlan vf_vlan;
871 struct ifla_vf_tx_rate vf_tx_rate;
872 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
874 vf_mac.vf = vf_vlan.vf = vf_tx_rate.vf = ivi.vf;
875 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
876 vf_vlan.vlan = ivi.vlan;
877 vf_vlan.qos = ivi.qos;
878 vf_tx_rate.rate = ivi.tx_rate;
879 vf = nla_nest_start(skb, IFLA_VF_INFO);
881 nla_nest_cancel(skb, vfinfo);
882 goto nla_put_failure;
884 NLA_PUT(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac);
885 NLA_PUT(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan);
886 NLA_PUT(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate), &vf_tx_rate);
887 nla_nest_end(skb, vf);
889 nla_nest_end(skb, vfinfo);
892 if (rtnl_port_fill(skb, dev))
893 goto nla_put_failure;
895 if (dev->rtnl_link_ops) {
896 if (rtnl_link_fill(skb, dev) < 0)
897 goto nla_put_failure;
900 return nlmsg_end(skb, nlh);
903 nlmsg_cancel(skb, nlh);
907 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
909 struct net *net = sock_net(skb->sk);
912 struct net_device *dev;
913 struct hlist_head *head;
914 struct hlist_node *node;
919 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
921 head = &net->dev_index_head[h];
922 hlist_for_each_entry(dev, node, head, index_hlist) {
925 if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
926 NETLINK_CB(cb->skb).pid,
927 cb->nlh->nlmsg_seq, 0,
941 const struct nla_policy ifla_policy[IFLA_MAX+1] = {
942 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
943 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
944 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
945 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
946 [IFLA_MTU] = { .type = NLA_U32 },
947 [IFLA_LINK] = { .type = NLA_U32 },
948 [IFLA_TXQLEN] = { .type = NLA_U32 },
949 [IFLA_WEIGHT] = { .type = NLA_U32 },
950 [IFLA_OPERSTATE] = { .type = NLA_U8 },
951 [IFLA_LINKMODE] = { .type = NLA_U8 },
952 [IFLA_LINKINFO] = { .type = NLA_NESTED },
953 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
954 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
955 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
956 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
957 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
959 EXPORT_SYMBOL(ifla_policy);
961 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
962 [IFLA_INFO_KIND] = { .type = NLA_STRING },
963 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
966 static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
967 [IFLA_VF_INFO] = { .type = NLA_NESTED },
970 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
971 [IFLA_VF_MAC] = { .type = NLA_BINARY,
972 .len = sizeof(struct ifla_vf_mac) },
973 [IFLA_VF_VLAN] = { .type = NLA_BINARY,
974 .len = sizeof(struct ifla_vf_vlan) },
975 [IFLA_VF_TX_RATE] = { .type = NLA_BINARY,
976 .len = sizeof(struct ifla_vf_tx_rate) },
979 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
980 [IFLA_PORT_VF] = { .type = NLA_U32 },
981 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
982 .len = PORT_PROFILE_MAX },
983 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
984 .len = sizeof(struct ifla_port_vsi)},
985 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
986 .len = PORT_UUID_MAX },
987 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
988 .len = PORT_UUID_MAX },
989 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
990 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
993 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
996 /* Examine the link attributes and figure out which
997 * network namespace we are talking about.
999 if (tb[IFLA_NET_NS_PID])
1000 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1002 net = get_net(src_net);
1005 EXPORT_SYMBOL(rtnl_link_get_net);
1007 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1010 if (tb[IFLA_ADDRESS] &&
1011 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1014 if (tb[IFLA_BROADCAST] &&
1015 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1022 static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
1024 int rem, err = -EINVAL;
1026 const struct net_device_ops *ops = dev->netdev_ops;
1028 nla_for_each_nested(vf, attr, rem) {
1029 switch (nla_type(vf)) {
1031 struct ifla_vf_mac *ivm;
1034 if (ops->ndo_set_vf_mac)
1035 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1039 case IFLA_VF_VLAN: {
1040 struct ifla_vf_vlan *ivv;
1043 if (ops->ndo_set_vf_vlan)
1044 err = ops->ndo_set_vf_vlan(dev, ivv->vf,
1049 case IFLA_VF_TX_RATE: {
1050 struct ifla_vf_tx_rate *ivt;
1053 if (ops->ndo_set_vf_tx_rate)
1054 err = ops->ndo_set_vf_tx_rate(dev, ivt->vf,
1068 static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
1069 struct nlattr **tb, char *ifname, int modified)
1071 const struct net_device_ops *ops = dev->netdev_ops;
1072 int send_addr_notify = 0;
1075 if (tb[IFLA_NET_NS_PID]) {
1076 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1081 err = dev_change_net_namespace(dev, net, ifname);
1089 struct rtnl_link_ifmap *u_map;
1092 if (!ops->ndo_set_config) {
1097 if (!netif_device_present(dev)) {
1102 u_map = nla_data(tb[IFLA_MAP]);
1103 k_map.mem_start = (unsigned long) u_map->mem_start;
1104 k_map.mem_end = (unsigned long) u_map->mem_end;
1105 k_map.base_addr = (unsigned short) u_map->base_addr;
1106 k_map.irq = (unsigned char) u_map->irq;
1107 k_map.dma = (unsigned char) u_map->dma;
1108 k_map.port = (unsigned char) u_map->port;
1110 err = ops->ndo_set_config(dev, &k_map);
1117 if (tb[IFLA_ADDRESS]) {
1118 struct sockaddr *sa;
1121 if (!ops->ndo_set_mac_address) {
1126 if (!netif_device_present(dev)) {
1131 len = sizeof(sa_family_t) + dev->addr_len;
1132 sa = kmalloc(len, GFP_KERNEL);
1137 sa->sa_family = dev->type;
1138 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1140 err = ops->ndo_set_mac_address(dev, sa);
1144 send_addr_notify = 1;
1149 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1156 * Interface selected by interface index but interface
1157 * name provided implies that a name change has been
1160 if (ifm->ifi_index > 0 && ifname[0]) {
1161 err = dev_change_name(dev, ifname);
1167 if (tb[IFLA_IFALIAS]) {
1168 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1169 nla_len(tb[IFLA_IFALIAS]));
1175 if (tb[IFLA_BROADCAST]) {
1176 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1177 send_addr_notify = 1;
1180 if (ifm->ifi_flags || ifm->ifi_change) {
1181 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1186 if (tb[IFLA_TXQLEN])
1187 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1189 if (tb[IFLA_OPERSTATE])
1190 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1192 if (tb[IFLA_LINKMODE]) {
1193 write_lock_bh(&dev_base_lock);
1194 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1195 write_unlock_bh(&dev_base_lock);
1198 if (tb[IFLA_VFINFO_LIST]) {
1199 struct nlattr *attr;
1201 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
1202 if (nla_type(attr) != IFLA_VF_INFO)
1204 err = do_setvfinfo(dev, attr);
1212 if (tb[IFLA_VF_PORTS]) {
1213 struct nlattr *port[IFLA_PORT_MAX+1];
1214 struct nlattr *attr;
1219 if (!ops->ndo_set_vf_port)
1222 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1223 if (nla_type(attr) != IFLA_VF_PORT)
1225 err = nla_parse_nested(port, IFLA_PORT_MAX,
1226 attr, ifla_port_policy);
1229 if (!port[IFLA_PORT_VF]) {
1233 vf = nla_get_u32(port[IFLA_PORT_VF]);
1234 err = ops->ndo_set_vf_port(dev, vf, port);
1242 if (tb[IFLA_PORT_SELF]) {
1243 struct nlattr *port[IFLA_PORT_MAX+1];
1245 err = nla_parse_nested(port, IFLA_PORT_MAX,
1246 tb[IFLA_PORT_SELF], ifla_port_policy);
1251 if (ops->ndo_set_vf_port)
1252 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1260 if (err < 0 && modified && net_ratelimit())
1261 printk(KERN_WARNING "A link change request failed with "
1262 "some changes comitted already. Interface %s may "
1263 "have been left with an inconsistent configuration, "
1264 "please check.\n", dev->name);
1266 if (send_addr_notify)
1267 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1271 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1273 struct net *net = sock_net(skb->sk);
1274 struct ifinfomsg *ifm;
1275 struct net_device *dev;
1277 struct nlattr *tb[IFLA_MAX+1];
1278 char ifname[IFNAMSIZ];
1280 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1284 if (tb[IFLA_IFNAME])
1285 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1290 ifm = nlmsg_data(nlh);
1291 if (ifm->ifi_index > 0)
1292 dev = __dev_get_by_index(net, ifm->ifi_index);
1293 else if (tb[IFLA_IFNAME])
1294 dev = __dev_get_by_name(net, ifname);
1303 err = validate_linkmsg(dev, tb);
1307 err = do_setlink(dev, ifm, tb, ifname, 0);
1312 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1314 struct net *net = sock_net(skb->sk);
1315 const struct rtnl_link_ops *ops;
1316 struct net_device *dev;
1317 struct ifinfomsg *ifm;
1318 char ifname[IFNAMSIZ];
1319 struct nlattr *tb[IFLA_MAX+1];
1322 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1326 if (tb[IFLA_IFNAME])
1327 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1329 ifm = nlmsg_data(nlh);
1330 if (ifm->ifi_index > 0)
1331 dev = __dev_get_by_index(net, ifm->ifi_index);
1332 else if (tb[IFLA_IFNAME])
1333 dev = __dev_get_by_name(net, ifname);
1340 ops = dev->rtnl_link_ops;
1344 ops->dellink(dev, NULL);
1348 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
1350 unsigned int old_flags;
1353 old_flags = dev->flags;
1354 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
1355 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1360 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
1361 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U);
1363 __dev_notify_flags(dev, old_flags);
1366 EXPORT_SYMBOL(rtnl_configure_link);
1368 struct net_device *rtnl_create_link(struct net *src_net, struct net *net,
1369 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
1372 struct net_device *dev;
1373 unsigned int num_queues = 1;
1374 unsigned int real_num_queues = 1;
1376 if (ops->get_tx_queues) {
1377 err = ops->get_tx_queues(src_net, tb, &num_queues,
1383 dev = alloc_netdev_mq(ops->priv_size, ifname, ops->setup, num_queues);
1387 dev_net_set(dev, net);
1388 dev->rtnl_link_ops = ops;
1389 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
1390 dev->real_num_tx_queues = real_num_queues;
1392 if (strchr(dev->name, '%')) {
1393 err = dev_alloc_name(dev, dev->name);
1399 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
1400 if (tb[IFLA_ADDRESS])
1401 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
1402 nla_len(tb[IFLA_ADDRESS]));
1403 if (tb[IFLA_BROADCAST])
1404 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
1405 nla_len(tb[IFLA_BROADCAST]));
1406 if (tb[IFLA_TXQLEN])
1407 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1408 if (tb[IFLA_OPERSTATE])
1409 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1410 if (tb[IFLA_LINKMODE])
1411 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1418 return ERR_PTR(err);
1420 EXPORT_SYMBOL(rtnl_create_link);
1422 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1424 struct net *net = sock_net(skb->sk);
1425 const struct rtnl_link_ops *ops;
1426 struct net_device *dev;
1427 struct ifinfomsg *ifm;
1428 char kind[MODULE_NAME_LEN];
1429 char ifname[IFNAMSIZ];
1430 struct nlattr *tb[IFLA_MAX+1];
1431 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
1434 #ifdef CONFIG_MODULES
1437 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1441 if (tb[IFLA_IFNAME])
1442 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1446 ifm = nlmsg_data(nlh);
1447 if (ifm->ifi_index > 0)
1448 dev = __dev_get_by_index(net, ifm->ifi_index);
1450 dev = __dev_get_by_name(net, ifname);
1454 err = validate_linkmsg(dev, tb);
1458 if (tb[IFLA_LINKINFO]) {
1459 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
1460 tb[IFLA_LINKINFO], ifla_info_policy);
1464 memset(linkinfo, 0, sizeof(linkinfo));
1466 if (linkinfo[IFLA_INFO_KIND]) {
1467 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
1468 ops = rtnl_link_ops_get(kind);
1475 struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL;
1476 struct net *dest_net;
1479 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
1480 err = nla_parse_nested(attr, ops->maxtype,
1481 linkinfo[IFLA_INFO_DATA],
1487 if (ops->validate) {
1488 err = ops->validate(tb, data);
1497 if (nlh->nlmsg_flags & NLM_F_EXCL)
1499 if (nlh->nlmsg_flags & NLM_F_REPLACE)
1502 if (linkinfo[IFLA_INFO_DATA]) {
1503 if (!ops || ops != dev->rtnl_link_ops ||
1507 err = ops->changelink(dev, tb, data);
1513 return do_setlink(dev, ifm, tb, ifname, modified);
1516 if (!(nlh->nlmsg_flags & NLM_F_CREATE))
1521 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
1525 #ifdef CONFIG_MODULES
1528 request_module("rtnl-link-%s", kind);
1530 ops = rtnl_link_ops_get(kind);
1539 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
1541 dest_net = rtnl_link_get_net(net, tb);
1542 dev = rtnl_create_link(net, dest_net, ifname, ops, tb);
1546 else if (ops->newlink)
1547 err = ops->newlink(net, dev, tb, data);
1549 err = register_netdevice(dev);
1551 if (err < 0 && !IS_ERR(dev))
1556 err = rtnl_configure_link(dev, ifm);
1558 unregister_netdevice(dev);
1565 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
1567 struct net *net = sock_net(skb->sk);
1568 struct ifinfomsg *ifm;
1569 char ifname[IFNAMSIZ];
1570 struct nlattr *tb[IFLA_MAX+1];
1571 struct net_device *dev = NULL;
1572 struct sk_buff *nskb;
1575 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1579 if (tb[IFLA_IFNAME])
1580 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1582 ifm = nlmsg_data(nlh);
1583 if (ifm->ifi_index > 0)
1584 dev = __dev_get_by_index(net, ifm->ifi_index);
1585 else if (tb[IFLA_IFNAME])
1586 dev = __dev_get_by_name(net, ifname);
1593 nskb = nlmsg_new(if_nlmsg_size(dev), GFP_KERNEL);
1597 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).pid,
1598 nlh->nlmsg_seq, 0, 0);
1600 /* -EMSGSIZE implies BUG in if_nlmsg_size */
1601 WARN_ON(err == -EMSGSIZE);
1604 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).pid);
1609 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1612 int s_idx = cb->family;
1616 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1617 int type = cb->nlh->nlmsg_type-RTM_BASE;
1618 if (idx < s_idx || idx == PF_PACKET)
1620 if (rtnl_msg_handlers[idx] == NULL ||
1621 rtnl_msg_handlers[idx][type].dumpit == NULL)
1624 memset(&cb->args[0], 0, sizeof(cb->args));
1625 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1633 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change)
1635 struct net *net = dev_net(dev);
1636 struct sk_buff *skb;
1639 skb = nlmsg_new(if_nlmsg_size(dev), GFP_KERNEL);
1643 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0);
1645 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
1646 WARN_ON(err == -EMSGSIZE);
1650 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
1654 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
1657 /* Protected by RTNL sempahore. */
1658 static struct rtattr **rta_buf;
1659 static int rtattr_max;
1661 /* Process one rtnetlink message. */
1663 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1665 struct net *net = sock_net(skb->sk);
1666 rtnl_doit_func doit;
1673 type = nlh->nlmsg_type;
1679 /* All the messages must have at least 1 byte length */
1680 if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg)))
1683 family = ((struct rtgenmsg *)NLMSG_DATA(nlh))->rtgen_family;
1687 if (kind != 2 && security_netlink_recv(skb, CAP_NET_ADMIN))
1690 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
1692 rtnl_dumpit_func dumpit;
1694 dumpit = rtnl_get_dumpit(family, type);
1700 err = netlink_dump_start(rtnl, skb, nlh, dumpit, NULL);
1705 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
1707 min_len = rtm_min[sz_idx];
1708 if (nlh->nlmsg_len < min_len)
1711 if (nlh->nlmsg_len > min_len) {
1712 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
1713 struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len);
1715 while (RTA_OK(attr, attrlen)) {
1716 unsigned flavor = attr->rta_type;
1718 if (flavor > rta_max[sz_idx])
1720 rta_buf[flavor-1] = attr;
1722 attr = RTA_NEXT(attr, attrlen);
1726 doit = rtnl_get_doit(family, type);
1730 return doit(skb, nlh, (void *)&rta_buf[0]);
1733 static void rtnetlink_rcv(struct sk_buff *skb)
1736 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
1740 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
1742 struct net_device *dev = ptr;
1748 case NETDEV_POST_INIT:
1749 case NETDEV_REGISTER:
1751 case NETDEV_PRE_TYPE_CHANGE:
1752 case NETDEV_GOING_DOWN:
1753 case NETDEV_UNREGISTER:
1754 case NETDEV_UNREGISTER_BATCH:
1757 rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
1763 static struct notifier_block rtnetlink_dev_notifier = {
1764 .notifier_call = rtnetlink_event,
1768 static int __net_init rtnetlink_net_init(struct net *net)
1771 sk = netlink_kernel_create(net, NETLINK_ROUTE, RTNLGRP_MAX,
1772 rtnetlink_rcv, &rtnl_mutex, THIS_MODULE);
1779 static void __net_exit rtnetlink_net_exit(struct net *net)
1781 netlink_kernel_release(net->rtnl);
1785 static struct pernet_operations rtnetlink_net_ops = {
1786 .init = rtnetlink_net_init,
1787 .exit = rtnetlink_net_exit,
1790 void __init rtnetlink_init(void)
1795 for (i = 0; i < ARRAY_SIZE(rta_max); i++)
1796 if (rta_max[i] > rtattr_max)
1797 rtattr_max = rta_max[i];
1798 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL);
1800 panic("rtnetlink_init: cannot allocate rta_buf\n");
1802 if (register_pernet_subsys(&rtnetlink_net_ops))
1803 panic("rtnetlink_init: cannot initialize rtnetlink\n");
1805 netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV);
1806 register_netdevice_notifier(&rtnetlink_dev_notifier);
1808 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, rtnl_dump_ifinfo);
1809 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL);
1810 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL);
1811 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL);
1813 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all);
1814 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all);