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/syslog.h>
25 #include <linux/timer.h>
26 #include <linux/string.h>
27 #include <linux/sockios.h>
28 #include <linux/net.h>
29 #include <linux/fcntl.h>
31 #include <linux/slab.h>
32 #include <linux/interrupt.h>
33 #include <linux/capability.h>
34 #include <linux/skbuff.h>
35 #include <linux/init.h>
36 #include <linux/security.h>
37 #include <linux/mutex.h>
38 #include <linux/if_addr.h>
39 #include <linux/pci.h>
41 #include <asm/uaccess.h>
42 #include <asm/system.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;
62 static DEFINE_MUTEX(rtnl_mutex);
66 mutex_lock(&rtnl_mutex);
68 EXPORT_SYMBOL(rtnl_lock);
70 void __rtnl_unlock(void)
72 mutex_unlock(&rtnl_mutex);
75 void rtnl_unlock(void)
77 /* This fellow will unlock it for us. */
80 EXPORT_SYMBOL(rtnl_unlock);
82 int rtnl_trylock(void)
84 return mutex_trylock(&rtnl_mutex);
86 EXPORT_SYMBOL(rtnl_trylock);
88 int rtnl_is_locked(void)
90 return mutex_is_locked(&rtnl_mutex);
92 EXPORT_SYMBOL(rtnl_is_locked);
94 #ifdef CONFIG_PROVE_LOCKING
95 int lockdep_rtnl_is_held(void)
97 return lockdep_is_held(&rtnl_mutex);
99 EXPORT_SYMBOL(lockdep_rtnl_is_held);
100 #endif /* #ifdef CONFIG_PROVE_LOCKING */
102 static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
104 static inline int rtm_msgindex(int msgtype)
106 int msgindex = msgtype - RTM_BASE;
109 * msgindex < 0 implies someone tried to register a netlink
110 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
111 * the message type has not been added to linux/rtnetlink.h
113 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
118 static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
120 struct rtnl_link *tab;
122 if (protocol <= RTNL_FAMILY_MAX)
123 tab = rtnl_msg_handlers[protocol];
127 if (tab == NULL || tab[msgindex].doit == NULL)
128 tab = rtnl_msg_handlers[PF_UNSPEC];
130 return tab ? tab[msgindex].doit : NULL;
133 static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
135 struct rtnl_link *tab;
137 if (protocol <= RTNL_FAMILY_MAX)
138 tab = rtnl_msg_handlers[protocol];
142 if (tab == NULL || tab[msgindex].dumpit == NULL)
143 tab = rtnl_msg_handlers[PF_UNSPEC];
145 return tab ? tab[msgindex].dumpit : NULL;
149 * __rtnl_register - Register a rtnetlink message type
150 * @protocol: Protocol family or PF_UNSPEC
151 * @msgtype: rtnetlink message type
152 * @doit: Function pointer called for each request message
153 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
155 * Registers the specified function pointers (at least one of them has
156 * to be non-NULL) to be called whenever a request message for the
157 * specified protocol family and message type is received.
159 * The special protocol family PF_UNSPEC may be used to define fallback
160 * function pointers for the case when no entry for the specific protocol
163 * Returns 0 on success or a negative error code.
165 int __rtnl_register(int protocol, int msgtype,
166 rtnl_doit_func doit, rtnl_dumpit_func dumpit)
168 struct rtnl_link *tab;
171 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
172 msgindex = rtm_msgindex(msgtype);
174 tab = rtnl_msg_handlers[protocol];
176 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
180 rtnl_msg_handlers[protocol] = tab;
184 tab[msgindex].doit = doit;
187 tab[msgindex].dumpit = dumpit;
191 EXPORT_SYMBOL_GPL(__rtnl_register);
194 * rtnl_register - Register a rtnetlink message type
196 * Identical to __rtnl_register() but panics on failure. This is useful
197 * as failure of this function is very unlikely, it can only happen due
198 * to lack of memory when allocating the chain to store all message
199 * handlers for a protocol. Meant for use in init functions where lack
200 * of memory implies no sense in continueing.
202 void rtnl_register(int protocol, int msgtype,
203 rtnl_doit_func doit, rtnl_dumpit_func dumpit)
205 if (__rtnl_register(protocol, msgtype, doit, dumpit) < 0)
206 panic("Unable to register rtnetlink message handler, "
207 "protocol = %d, message type = %d\n",
210 EXPORT_SYMBOL_GPL(rtnl_register);
213 * rtnl_unregister - Unregister a rtnetlink message type
214 * @protocol: Protocol family or PF_UNSPEC
215 * @msgtype: rtnetlink message type
217 * Returns 0 on success or a negative error code.
219 int rtnl_unregister(int protocol, int msgtype)
223 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
224 msgindex = rtm_msgindex(msgtype);
226 if (rtnl_msg_handlers[protocol] == NULL)
229 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
230 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
234 EXPORT_SYMBOL_GPL(rtnl_unregister);
237 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
238 * @protocol : Protocol family or PF_UNSPEC
240 * Identical to calling rtnl_unregster() for all registered message types
241 * of a certain protocol family.
243 void rtnl_unregister_all(int protocol)
245 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
247 kfree(rtnl_msg_handlers[protocol]);
248 rtnl_msg_handlers[protocol] = NULL;
250 EXPORT_SYMBOL_GPL(rtnl_unregister_all);
252 static LIST_HEAD(link_ops);
255 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
256 * @ops: struct rtnl_link_ops * to register
258 * The caller must hold the rtnl_mutex. This function should be used
259 * by drivers that create devices during module initialization. It
260 * must be called before registering the devices.
262 * Returns 0 on success or a negative error code.
264 int __rtnl_link_register(struct rtnl_link_ops *ops)
267 ops->dellink = unregister_netdevice_queue;
269 list_add_tail(&ops->list, &link_ops);
272 EXPORT_SYMBOL_GPL(__rtnl_link_register);
275 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
276 * @ops: struct rtnl_link_ops * to register
278 * Returns 0 on success or a negative error code.
280 int rtnl_link_register(struct rtnl_link_ops *ops)
285 err = __rtnl_link_register(ops);
289 EXPORT_SYMBOL_GPL(rtnl_link_register);
291 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
293 struct net_device *dev;
294 LIST_HEAD(list_kill);
296 for_each_netdev(net, dev) {
297 if (dev->rtnl_link_ops == ops)
298 ops->dellink(dev, &list_kill);
300 unregister_netdevice_many(&list_kill);
303 void rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
306 __rtnl_kill_links(net, ops);
309 EXPORT_SYMBOL_GPL(rtnl_kill_links);
312 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
313 * @ops: struct rtnl_link_ops * to unregister
315 * The caller must hold the rtnl_mutex.
317 void __rtnl_link_unregister(struct rtnl_link_ops *ops)
322 __rtnl_kill_links(net, ops);
324 list_del(&ops->list);
326 EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
329 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
330 * @ops: struct rtnl_link_ops * to unregister
332 void rtnl_link_unregister(struct rtnl_link_ops *ops)
335 __rtnl_link_unregister(ops);
338 EXPORT_SYMBOL_GPL(rtnl_link_unregister);
340 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
342 const struct rtnl_link_ops *ops;
344 list_for_each_entry(ops, &link_ops, list) {
345 if (!strcmp(ops->kind, kind))
351 static size_t rtnl_link_get_size(const struct net_device *dev)
353 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
359 size = nlmsg_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
360 nlmsg_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
363 /* IFLA_INFO_DATA + nested data */
364 size += nlmsg_total_size(sizeof(struct nlattr)) +
367 if (ops->get_xstats_size)
368 size += ops->get_xstats_size(dev); /* IFLA_INFO_XSTATS */
373 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
375 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
376 struct nlattr *linkinfo, *data;
379 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
380 if (linkinfo == NULL)
383 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
384 goto err_cancel_link;
385 if (ops->fill_xstats) {
386 err = ops->fill_xstats(skb, dev);
388 goto err_cancel_link;
390 if (ops->fill_info) {
391 data = nla_nest_start(skb, IFLA_INFO_DATA);
393 goto err_cancel_link;
394 err = ops->fill_info(skb, dev);
396 goto err_cancel_data;
397 nla_nest_end(skb, data);
400 nla_nest_end(skb, linkinfo);
404 nla_nest_cancel(skb, data);
406 nla_nest_cancel(skb, linkinfo);
411 static const int rtm_min[RTM_NR_FAMILIES] =
413 [RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
414 [RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)),
415 [RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)),
416 [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)),
417 [RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
418 [RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
419 [RTM_FAM(RTM_NEWTFILTER)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
420 [RTM_FAM(RTM_NEWACTION)] = NLMSG_LENGTH(sizeof(struct tcamsg)),
421 [RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
422 [RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
425 static const int rta_max[RTM_NR_FAMILIES] =
427 [RTM_FAM(RTM_NEWLINK)] = IFLA_MAX,
428 [RTM_FAM(RTM_NEWADDR)] = IFA_MAX,
429 [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX,
430 [RTM_FAM(RTM_NEWRULE)] = FRA_MAX,
431 [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX,
432 [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX,
433 [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX,
434 [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX,
437 void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data)
440 int size = RTA_LENGTH(attrlen);
442 rta = (struct rtattr *)skb_put(skb, RTA_ALIGN(size));
443 rta->rta_type = attrtype;
445 memcpy(RTA_DATA(rta), data, attrlen);
446 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
448 EXPORT_SYMBOL(__rta_fill);
450 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned group, int echo)
452 struct sock *rtnl = net->rtnl;
455 NETLINK_CB(skb).dst_group = group;
457 atomic_inc(&skb->users);
458 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
460 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
464 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
466 struct sock *rtnl = net->rtnl;
468 return nlmsg_unicast(rtnl, skb, pid);
470 EXPORT_SYMBOL(rtnl_unicast);
472 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
473 struct nlmsghdr *nlh, gfp_t flags)
475 struct sock *rtnl = net->rtnl;
479 report = nlmsg_report(nlh);
481 nlmsg_notify(rtnl, skb, pid, group, report, flags);
483 EXPORT_SYMBOL(rtnl_notify);
485 void rtnl_set_sk_err(struct net *net, u32 group, int error)
487 struct sock *rtnl = net->rtnl;
489 netlink_set_err(rtnl, 0, group, error);
491 EXPORT_SYMBOL(rtnl_set_sk_err);
493 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
498 mx = nla_nest_start(skb, RTA_METRICS);
502 for (i = 0; i < RTAX_MAX; i++) {
505 NLA_PUT_U32(skb, i+1, metrics[i]);
510 nla_nest_cancel(skb, mx);
514 return nla_nest_end(skb, mx);
517 nla_nest_cancel(skb, mx);
520 EXPORT_SYMBOL(rtnetlink_put_metrics);
522 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
523 u32 ts, u32 tsage, long expires, u32 error)
525 struct rta_cacheinfo ci = {
526 .rta_lastuse = jiffies_to_clock_t(jiffies - dst->lastuse),
527 .rta_used = dst->__use,
528 .rta_clntref = atomic_read(&(dst->__refcnt)),
536 ci.rta_expires = jiffies_to_clock_t(expires);
538 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
540 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
542 static void set_operstate(struct net_device *dev, unsigned char transition)
544 unsigned char operstate = dev->operstate;
546 switch (transition) {
548 if ((operstate == IF_OPER_DORMANT ||
549 operstate == IF_OPER_UNKNOWN) &&
551 operstate = IF_OPER_UP;
554 case IF_OPER_DORMANT:
555 if (operstate == IF_OPER_UP ||
556 operstate == IF_OPER_UNKNOWN)
557 operstate = IF_OPER_DORMANT;
561 if (dev->operstate != operstate) {
562 write_lock_bh(&dev_base_lock);
563 dev->operstate = operstate;
564 write_unlock_bh(&dev_base_lock);
565 netdev_state_change(dev);
569 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
570 const struct ifinfomsg *ifm)
572 unsigned int flags = ifm->ifi_flags;
574 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
576 flags = (flags & ifm->ifi_change) |
577 (dev->flags & ~ifm->ifi_change);
582 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
583 const struct net_device_stats *b)
585 a->rx_packets = b->rx_packets;
586 a->tx_packets = b->tx_packets;
587 a->rx_bytes = b->rx_bytes;
588 a->tx_bytes = b->tx_bytes;
589 a->rx_errors = b->rx_errors;
590 a->tx_errors = b->tx_errors;
591 a->rx_dropped = b->rx_dropped;
592 a->tx_dropped = b->tx_dropped;
594 a->multicast = b->multicast;
595 a->collisions = b->collisions;
597 a->rx_length_errors = b->rx_length_errors;
598 a->rx_over_errors = b->rx_over_errors;
599 a->rx_crc_errors = b->rx_crc_errors;
600 a->rx_frame_errors = b->rx_frame_errors;
601 a->rx_fifo_errors = b->rx_fifo_errors;
602 a->rx_missed_errors = b->rx_missed_errors;
604 a->tx_aborted_errors = b->tx_aborted_errors;
605 a->tx_carrier_errors = b->tx_carrier_errors;
606 a->tx_fifo_errors = b->tx_fifo_errors;
607 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
608 a->tx_window_errors = b->tx_window_errors;
610 a->rx_compressed = b->rx_compressed;
611 a->tx_compressed = b->tx_compressed;
614 static void copy_rtnl_link_stats64(void *v, const struct net_device_stats *b)
616 struct rtnl_link_stats64 a;
618 a.rx_packets = b->rx_packets;
619 a.tx_packets = b->tx_packets;
620 a.rx_bytes = b->rx_bytes;
621 a.tx_bytes = b->tx_bytes;
622 a.rx_errors = b->rx_errors;
623 a.tx_errors = b->tx_errors;
624 a.rx_dropped = b->rx_dropped;
625 a.tx_dropped = b->tx_dropped;
627 a.multicast = b->multicast;
628 a.collisions = b->collisions;
630 a.rx_length_errors = b->rx_length_errors;
631 a.rx_over_errors = b->rx_over_errors;
632 a.rx_crc_errors = b->rx_crc_errors;
633 a.rx_frame_errors = b->rx_frame_errors;
634 a.rx_fifo_errors = b->rx_fifo_errors;
635 a.rx_missed_errors = b->rx_missed_errors;
637 a.tx_aborted_errors = b->tx_aborted_errors;
638 a.tx_carrier_errors = b->tx_carrier_errors;
639 a.tx_fifo_errors = b->tx_fifo_errors;
640 a.tx_heartbeat_errors = b->tx_heartbeat_errors;
641 a.tx_window_errors = b->tx_window_errors;
643 a.rx_compressed = b->rx_compressed;
644 a.tx_compressed = b->tx_compressed;
645 memcpy(v, &a, sizeof(a));
649 static inline int rtnl_vfinfo_size(const struct net_device *dev)
651 if (dev->dev.parent && dev_is_pci(dev->dev.parent)) {
653 int num_vfs = dev_num_vf(dev->dev.parent);
654 size_t size = nla_total_size(sizeof(struct nlattr));
655 size += nla_total_size(num_vfs * sizeof(struct nlattr));
657 (nla_total_size(sizeof(struct ifla_vf_mac)) +
658 nla_total_size(sizeof(struct ifla_vf_vlan)) +
659 nla_total_size(sizeof(struct ifla_vf_tx_rate)));
665 static size_t rtnl_port_size(const struct net_device *dev)
667 size_t port_size = nla_total_size(4) /* PORT_VF */
668 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
669 + nla_total_size(sizeof(struct ifla_port_vsi))
671 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
672 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
673 + nla_total_size(1) /* PROT_VDP_REQUEST */
674 + nla_total_size(2); /* PORT_VDP_RESPONSE */
675 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
676 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
678 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
681 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
683 if (dev_num_vf(dev->dev.parent))
684 return port_self_size + vf_ports_size +
685 vf_port_size * dev_num_vf(dev->dev.parent);
687 return port_self_size;
690 static inline size_t if_nlmsg_size(const struct net_device *dev)
692 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
693 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
694 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
695 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
696 + nla_total_size(sizeof(struct rtnl_link_ifmap))
697 + nla_total_size(sizeof(struct rtnl_link_stats))
698 + nla_total_size(sizeof(struct rtnl_link_stats64))
699 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
700 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
701 + nla_total_size(4) /* IFLA_TXQLEN */
702 + nla_total_size(4) /* IFLA_WEIGHT */
703 + nla_total_size(4) /* IFLA_MTU */
704 + nla_total_size(4) /* IFLA_LINK */
705 + nla_total_size(4) /* IFLA_MASTER */
706 + nla_total_size(1) /* IFLA_OPERSTATE */
707 + nla_total_size(1) /* IFLA_LINKMODE */
708 + nla_total_size(4) /* IFLA_NUM_VF */
709 + rtnl_vfinfo_size(dev) /* IFLA_VFINFO_LIST */
710 + rtnl_port_size(dev) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
711 + rtnl_link_get_size(dev); /* IFLA_LINKINFO */
714 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
716 struct nlattr *vf_ports;
717 struct nlattr *vf_port;
721 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
725 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
726 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
728 goto nla_put_failure;
729 NLA_PUT_U32(skb, IFLA_PORT_VF, vf);
730 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
731 if (err == -EMSGSIZE)
732 goto nla_put_failure;
734 nla_nest_cancel(skb, vf_port);
737 nla_nest_end(skb, vf_port);
740 nla_nest_end(skb, vf_ports);
745 nla_nest_cancel(skb, vf_ports);
749 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
751 struct nlattr *port_self;
754 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
758 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
760 nla_nest_cancel(skb, port_self);
761 return (err == -EMSGSIZE) ? err : 0;
764 nla_nest_end(skb, port_self);
769 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev)
773 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
776 err = rtnl_port_self_fill(skb, dev);
780 if (dev_num_vf(dev->dev.parent)) {
781 err = rtnl_vf_ports_fill(skb, dev);
789 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
790 int type, u32 pid, u32 seq, u32 change,
793 struct ifinfomsg *ifm;
794 struct nlmsghdr *nlh;
795 const struct net_device_stats *stats;
798 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
802 ifm = nlmsg_data(nlh);
803 ifm->ifi_family = AF_UNSPEC;
805 ifm->ifi_type = dev->type;
806 ifm->ifi_index = dev->ifindex;
807 ifm->ifi_flags = dev_get_flags(dev);
808 ifm->ifi_change = change;
810 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
811 NLA_PUT_U32(skb, IFLA_TXQLEN, dev->tx_queue_len);
812 NLA_PUT_U8(skb, IFLA_OPERSTATE,
813 netif_running(dev) ? dev->operstate : IF_OPER_DOWN);
814 NLA_PUT_U8(skb, IFLA_LINKMODE, dev->link_mode);
815 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
817 if (dev->ifindex != dev->iflink)
818 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
821 NLA_PUT_U32(skb, IFLA_MASTER, dev->master->ifindex);
824 NLA_PUT_STRING(skb, IFLA_QDISC, dev->qdisc->ops->id);
827 NLA_PUT_STRING(skb, IFLA_IFALIAS, dev->ifalias);
830 struct rtnl_link_ifmap map = {
831 .mem_start = dev->mem_start,
832 .mem_end = dev->mem_end,
833 .base_addr = dev->base_addr,
836 .port = dev->if_port,
838 NLA_PUT(skb, IFLA_MAP, sizeof(map), &map);
842 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
843 NLA_PUT(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast);
846 attr = nla_reserve(skb, IFLA_STATS,
847 sizeof(struct rtnl_link_stats));
849 goto nla_put_failure;
851 stats = dev_get_stats(dev);
852 copy_rtnl_link_stats(nla_data(attr), stats);
854 attr = nla_reserve(skb, IFLA_STATS64,
855 sizeof(struct rtnl_link_stats64));
857 goto nla_put_failure;
858 copy_rtnl_link_stats64(nla_data(attr), stats);
861 NLA_PUT_U32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent));
863 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent) {
866 struct nlattr *vfinfo, *vf;
867 int num_vfs = dev_num_vf(dev->dev.parent);
869 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
871 goto nla_put_failure;
872 for (i = 0; i < num_vfs; i++) {
873 struct ifla_vf_info ivi;
874 struct ifla_vf_mac vf_mac;
875 struct ifla_vf_vlan vf_vlan;
876 struct ifla_vf_tx_rate vf_tx_rate;
877 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
879 vf_mac.vf = vf_vlan.vf = vf_tx_rate.vf = ivi.vf;
880 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
881 vf_vlan.vlan = ivi.vlan;
882 vf_vlan.qos = ivi.qos;
883 vf_tx_rate.rate = ivi.tx_rate;
884 vf = nla_nest_start(skb, IFLA_VF_INFO);
886 nla_nest_cancel(skb, vfinfo);
887 goto nla_put_failure;
889 NLA_PUT(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac);
890 NLA_PUT(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan);
891 NLA_PUT(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate), &vf_tx_rate);
892 nla_nest_end(skb, vf);
894 nla_nest_end(skb, vfinfo);
897 if (rtnl_port_fill(skb, dev))
898 goto nla_put_failure;
900 if (dev->rtnl_link_ops) {
901 if (rtnl_link_fill(skb, dev) < 0)
902 goto nla_put_failure;
905 return nlmsg_end(skb, nlh);
908 nlmsg_cancel(skb, nlh);
912 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
914 struct net *net = sock_net(skb->sk);
917 struct net_device *dev;
918 struct hlist_head *head;
919 struct hlist_node *node;
924 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
926 head = &net->dev_index_head[h];
927 hlist_for_each_entry(dev, node, head, index_hlist) {
930 if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
931 NETLINK_CB(cb->skb).pid,
932 cb->nlh->nlmsg_seq, 0,
946 const struct nla_policy ifla_policy[IFLA_MAX+1] = {
947 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
948 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
949 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
950 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
951 [IFLA_MTU] = { .type = NLA_U32 },
952 [IFLA_LINK] = { .type = NLA_U32 },
953 [IFLA_TXQLEN] = { .type = NLA_U32 },
954 [IFLA_WEIGHT] = { .type = NLA_U32 },
955 [IFLA_OPERSTATE] = { .type = NLA_U8 },
956 [IFLA_LINKMODE] = { .type = NLA_U8 },
957 [IFLA_LINKINFO] = { .type = NLA_NESTED },
958 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
959 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
960 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
961 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
962 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
964 EXPORT_SYMBOL(ifla_policy);
966 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
967 [IFLA_INFO_KIND] = { .type = NLA_STRING },
968 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
971 static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
972 [IFLA_VF_INFO] = { .type = NLA_NESTED },
975 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
976 [IFLA_VF_MAC] = { .type = NLA_BINARY,
977 .len = sizeof(struct ifla_vf_mac) },
978 [IFLA_VF_VLAN] = { .type = NLA_BINARY,
979 .len = sizeof(struct ifla_vf_vlan) },
980 [IFLA_VF_TX_RATE] = { .type = NLA_BINARY,
981 .len = sizeof(struct ifla_vf_tx_rate) },
984 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
985 [IFLA_PORT_VF] = { .type = NLA_U32 },
986 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
987 .len = PORT_PROFILE_MAX },
988 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
989 .len = sizeof(struct ifla_port_vsi)},
990 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
991 .len = PORT_UUID_MAX },
992 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
993 .len = PORT_UUID_MAX },
994 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
995 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
998 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1001 /* Examine the link attributes and figure out which
1002 * network namespace we are talking about.
1004 if (tb[IFLA_NET_NS_PID])
1005 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1007 net = get_net(src_net);
1010 EXPORT_SYMBOL(rtnl_link_get_net);
1012 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1015 if (tb[IFLA_ADDRESS] &&
1016 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1019 if (tb[IFLA_BROADCAST] &&
1020 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1027 static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
1029 int rem, err = -EINVAL;
1031 const struct net_device_ops *ops = dev->netdev_ops;
1033 nla_for_each_nested(vf, attr, rem) {
1034 switch (nla_type(vf)) {
1036 struct ifla_vf_mac *ivm;
1039 if (ops->ndo_set_vf_mac)
1040 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1044 case IFLA_VF_VLAN: {
1045 struct ifla_vf_vlan *ivv;
1048 if (ops->ndo_set_vf_vlan)
1049 err = ops->ndo_set_vf_vlan(dev, ivv->vf,
1054 case IFLA_VF_TX_RATE: {
1055 struct ifla_vf_tx_rate *ivt;
1058 if (ops->ndo_set_vf_tx_rate)
1059 err = ops->ndo_set_vf_tx_rate(dev, ivt->vf,
1073 static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
1074 struct nlattr **tb, char *ifname, int modified)
1076 const struct net_device_ops *ops = dev->netdev_ops;
1077 int send_addr_notify = 0;
1080 if (tb[IFLA_NET_NS_PID]) {
1081 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1087 register pid_t net_ns_pid;
1089 net_ns_pid = nla_get_u32(tb[IFLA_NET_NS_PID]);
1090 dev->syslog_ns = find_syslog_ns_bypid(net_ns_pid);
1093 err = dev_change_net_namespace(dev, net, ifname);
1101 struct rtnl_link_ifmap *u_map;
1104 if (!ops->ndo_set_config) {
1109 if (!netif_device_present(dev)) {
1114 u_map = nla_data(tb[IFLA_MAP]);
1115 k_map.mem_start = (unsigned long) u_map->mem_start;
1116 k_map.mem_end = (unsigned long) u_map->mem_end;
1117 k_map.base_addr = (unsigned short) u_map->base_addr;
1118 k_map.irq = (unsigned char) u_map->irq;
1119 k_map.dma = (unsigned char) u_map->dma;
1120 k_map.port = (unsigned char) u_map->port;
1122 err = ops->ndo_set_config(dev, &k_map);
1129 if (tb[IFLA_ADDRESS]) {
1130 struct sockaddr *sa;
1133 if (!ops->ndo_set_mac_address) {
1138 if (!netif_device_present(dev)) {
1143 len = sizeof(sa_family_t) + dev->addr_len;
1144 sa = kmalloc(len, GFP_KERNEL);
1149 sa->sa_family = dev->type;
1150 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1152 err = ops->ndo_set_mac_address(dev, sa);
1156 send_addr_notify = 1;
1161 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1168 * Interface selected by interface index but interface
1169 * name provided implies that a name change has been
1172 if (ifm->ifi_index > 0 && ifname[0]) {
1173 err = dev_change_name(dev, ifname);
1179 if (tb[IFLA_IFALIAS]) {
1180 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1181 nla_len(tb[IFLA_IFALIAS]));
1187 if (tb[IFLA_BROADCAST]) {
1188 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1189 send_addr_notify = 1;
1192 if (ifm->ifi_flags || ifm->ifi_change) {
1193 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1198 if (tb[IFLA_TXQLEN])
1199 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1201 if (tb[IFLA_OPERSTATE])
1202 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1204 if (tb[IFLA_LINKMODE]) {
1205 write_lock_bh(&dev_base_lock);
1206 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1207 write_unlock_bh(&dev_base_lock);
1210 if (tb[IFLA_VFINFO_LIST]) {
1211 struct nlattr *attr;
1213 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
1214 if (nla_type(attr) != IFLA_VF_INFO) {
1218 err = do_setvfinfo(dev, attr);
1226 if (tb[IFLA_VF_PORTS]) {
1227 struct nlattr *port[IFLA_PORT_MAX+1];
1228 struct nlattr *attr;
1233 if (!ops->ndo_set_vf_port)
1236 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1237 if (nla_type(attr) != IFLA_VF_PORT)
1239 err = nla_parse_nested(port, IFLA_PORT_MAX,
1240 attr, ifla_port_policy);
1243 if (!port[IFLA_PORT_VF]) {
1247 vf = nla_get_u32(port[IFLA_PORT_VF]);
1248 err = ops->ndo_set_vf_port(dev, vf, port);
1256 if (tb[IFLA_PORT_SELF]) {
1257 struct nlattr *port[IFLA_PORT_MAX+1];
1259 err = nla_parse_nested(port, IFLA_PORT_MAX,
1260 tb[IFLA_PORT_SELF], ifla_port_policy);
1265 if (ops->ndo_set_vf_port)
1266 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1274 if (err < 0 && modified && net_ratelimit())
1275 printk(KERN_WARNING "A link change request failed with "
1276 "some changes comitted already. Interface %s may "
1277 "have been left with an inconsistent configuration, "
1278 "please check.\n", dev->name);
1280 if (send_addr_notify)
1281 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1285 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1287 struct net *net = sock_net(skb->sk);
1288 struct ifinfomsg *ifm;
1289 struct net_device *dev;
1291 struct nlattr *tb[IFLA_MAX+1];
1292 char ifname[IFNAMSIZ];
1294 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1298 if (tb[IFLA_IFNAME])
1299 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1304 ifm = nlmsg_data(nlh);
1305 if (ifm->ifi_index > 0)
1306 dev = __dev_get_by_index(net, ifm->ifi_index);
1307 else if (tb[IFLA_IFNAME])
1308 dev = __dev_get_by_name(net, ifname);
1317 err = validate_linkmsg(dev, tb);
1321 err = do_setlink(dev, ifm, tb, ifname, 0);
1326 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1328 struct net *net = sock_net(skb->sk);
1329 const struct rtnl_link_ops *ops;
1330 struct net_device *dev;
1331 struct ifinfomsg *ifm;
1332 char ifname[IFNAMSIZ];
1333 struct nlattr *tb[IFLA_MAX+1];
1336 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1340 if (tb[IFLA_IFNAME])
1341 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1343 ifm = nlmsg_data(nlh);
1344 if (ifm->ifi_index > 0)
1345 dev = __dev_get_by_index(net, ifm->ifi_index);
1346 else if (tb[IFLA_IFNAME])
1347 dev = __dev_get_by_name(net, ifname);
1354 ops = dev->rtnl_link_ops;
1358 ops->dellink(dev, NULL);
1362 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
1364 unsigned int old_flags;
1367 old_flags = dev->flags;
1368 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
1369 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1374 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
1375 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U);
1377 __dev_notify_flags(dev, old_flags);
1380 EXPORT_SYMBOL(rtnl_configure_link);
1382 struct net_device *rtnl_create_link(struct net *src_net, struct net *net,
1383 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
1386 struct net_device *dev;
1387 unsigned int num_queues = 1;
1388 unsigned int real_num_queues = 1;
1390 if (ops->get_tx_queues) {
1391 err = ops->get_tx_queues(src_net, tb, &num_queues,
1397 dev = alloc_netdev_mq(ops->priv_size, ifname, ops->setup, num_queues);
1401 dev_net_set(dev, net);
1402 dev->rtnl_link_ops = ops;
1403 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
1404 dev->real_num_tx_queues = real_num_queues;
1406 if (strchr(dev->name, '%')) {
1407 err = dev_alloc_name(dev, dev->name);
1413 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
1414 if (tb[IFLA_ADDRESS])
1415 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
1416 nla_len(tb[IFLA_ADDRESS]));
1417 if (tb[IFLA_BROADCAST])
1418 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
1419 nla_len(tb[IFLA_BROADCAST]));
1420 if (tb[IFLA_TXQLEN])
1421 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1422 if (tb[IFLA_OPERSTATE])
1423 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1424 if (tb[IFLA_LINKMODE])
1425 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1432 return ERR_PTR(err);
1434 EXPORT_SYMBOL(rtnl_create_link);
1436 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1438 struct net *net = sock_net(skb->sk);
1439 const struct rtnl_link_ops *ops;
1440 struct net_device *dev;
1441 struct ifinfomsg *ifm;
1442 char kind[MODULE_NAME_LEN];
1443 char ifname[IFNAMSIZ];
1444 struct nlattr *tb[IFLA_MAX+1];
1445 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
1448 #ifdef CONFIG_MODULES
1451 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1455 if (tb[IFLA_IFNAME])
1456 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1460 ifm = nlmsg_data(nlh);
1461 if (ifm->ifi_index > 0)
1462 dev = __dev_get_by_index(net, ifm->ifi_index);
1464 dev = __dev_get_by_name(net, ifname);
1468 err = validate_linkmsg(dev, tb);
1472 if (tb[IFLA_LINKINFO]) {
1473 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
1474 tb[IFLA_LINKINFO], ifla_info_policy);
1478 memset(linkinfo, 0, sizeof(linkinfo));
1480 if (linkinfo[IFLA_INFO_KIND]) {
1481 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
1482 ops = rtnl_link_ops_get(kind);
1489 struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL;
1490 struct net *dest_net;
1493 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
1494 err = nla_parse_nested(attr, ops->maxtype,
1495 linkinfo[IFLA_INFO_DATA],
1501 if (ops->validate) {
1502 err = ops->validate(tb, data);
1511 if (nlh->nlmsg_flags & NLM_F_EXCL)
1513 if (nlh->nlmsg_flags & NLM_F_REPLACE)
1516 if (linkinfo[IFLA_INFO_DATA]) {
1517 if (!ops || ops != dev->rtnl_link_ops ||
1521 err = ops->changelink(dev, tb, data);
1527 return do_setlink(dev, ifm, tb, ifname, modified);
1530 if (!(nlh->nlmsg_flags & NLM_F_CREATE))
1535 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
1539 #ifdef CONFIG_MODULES
1542 request_module("rtnl-link-%s", kind);
1544 ops = rtnl_link_ops_get(kind);
1553 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
1555 dest_net = rtnl_link_get_net(net, tb);
1556 dev = rtnl_create_link(net, dest_net, ifname, ops, tb);
1560 else if (ops->newlink)
1561 err = ops->newlink(net, dev, tb, data);
1563 err = register_netdevice(dev);
1565 if (err < 0 && !IS_ERR(dev))
1570 err = rtnl_configure_link(dev, ifm);
1572 unregister_netdevice(dev);
1579 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
1581 struct net *net = sock_net(skb->sk);
1582 struct ifinfomsg *ifm;
1583 char ifname[IFNAMSIZ];
1584 struct nlattr *tb[IFLA_MAX+1];
1585 struct net_device *dev = NULL;
1586 struct sk_buff *nskb;
1589 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1593 if (tb[IFLA_IFNAME])
1594 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1596 ifm = nlmsg_data(nlh);
1597 if (ifm->ifi_index > 0)
1598 dev = __dev_get_by_index(net, ifm->ifi_index);
1599 else if (tb[IFLA_IFNAME])
1600 dev = __dev_get_by_name(net, ifname);
1607 nskb = nlmsg_new(if_nlmsg_size(dev), GFP_KERNEL);
1611 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).pid,
1612 nlh->nlmsg_seq, 0, 0);
1614 /* -EMSGSIZE implies BUG in if_nlmsg_size */
1615 WARN_ON(err == -EMSGSIZE);
1618 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).pid);
1623 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1626 int s_idx = cb->family;
1630 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1631 int type = cb->nlh->nlmsg_type-RTM_BASE;
1632 if (idx < s_idx || idx == PF_PACKET)
1634 if (rtnl_msg_handlers[idx] == NULL ||
1635 rtnl_msg_handlers[idx][type].dumpit == NULL)
1638 memset(&cb->args[0], 0, sizeof(cb->args));
1639 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1647 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change)
1649 struct net *net = dev_net(dev);
1650 struct sk_buff *skb;
1653 skb = nlmsg_new(if_nlmsg_size(dev), GFP_KERNEL);
1657 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0);
1659 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
1660 WARN_ON(err == -EMSGSIZE);
1664 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
1668 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
1671 /* Protected by RTNL sempahore. */
1672 static struct rtattr **rta_buf;
1673 static int rtattr_max;
1675 /* Process one rtnetlink message. */
1677 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1679 struct net *net = sock_net(skb->sk);
1680 rtnl_doit_func doit;
1687 type = nlh->nlmsg_type;
1693 /* All the messages must have at least 1 byte length */
1694 if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg)))
1697 family = ((struct rtgenmsg *)NLMSG_DATA(nlh))->rtgen_family;
1701 if (kind != 2 && security_netlink_recv(skb, CAP_NET_ADMIN))
1704 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
1706 rtnl_dumpit_func dumpit;
1708 dumpit = rtnl_get_dumpit(family, type);
1714 err = netlink_dump_start(rtnl, skb, nlh, dumpit, NULL);
1719 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
1721 min_len = rtm_min[sz_idx];
1722 if (nlh->nlmsg_len < min_len)
1725 if (nlh->nlmsg_len > min_len) {
1726 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
1727 struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len);
1729 while (RTA_OK(attr, attrlen)) {
1730 unsigned flavor = attr->rta_type;
1732 if (flavor > rta_max[sz_idx])
1734 rta_buf[flavor-1] = attr;
1736 attr = RTA_NEXT(attr, attrlen);
1740 doit = rtnl_get_doit(family, type);
1744 return doit(skb, nlh, (void *)&rta_buf[0]);
1747 static void rtnetlink_rcv(struct sk_buff *skb)
1750 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
1754 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
1756 struct net_device *dev = ptr;
1762 case NETDEV_POST_INIT:
1763 case NETDEV_REGISTER:
1765 case NETDEV_PRE_TYPE_CHANGE:
1766 case NETDEV_GOING_DOWN:
1767 case NETDEV_UNREGISTER:
1768 case NETDEV_UNREGISTER_BATCH:
1771 rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
1777 static struct notifier_block rtnetlink_dev_notifier = {
1778 .notifier_call = rtnetlink_event,
1782 static int __net_init rtnetlink_net_init(struct net *net)
1785 sk = netlink_kernel_create(net, NETLINK_ROUTE, RTNLGRP_MAX,
1786 rtnetlink_rcv, &rtnl_mutex, THIS_MODULE);
1793 static void __net_exit rtnetlink_net_exit(struct net *net)
1795 netlink_kernel_release(net->rtnl);
1799 static struct pernet_operations rtnetlink_net_ops = {
1800 .init = rtnetlink_net_init,
1801 .exit = rtnetlink_net_exit,
1804 void __init rtnetlink_init(void)
1809 for (i = 0; i < ARRAY_SIZE(rta_max); i++)
1810 if (rta_max[i] > rtattr_max)
1811 rtattr_max = rta_max[i];
1812 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL);
1814 panic("rtnetlink_init: cannot allocate rta_buf\n");
1816 if (register_pernet_subsys(&rtnetlink_net_ops))
1817 panic("rtnetlink_init: cannot initialize rtnetlink\n");
1819 netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV);
1820 register_netdevice_notifier(&rtnetlink_dev_notifier);
1822 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, rtnl_dump_ifinfo);
1823 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL);
1824 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL);
1825 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL);
1827 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all);
1828 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all);