2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Routing netlink socket interface: protocol independent part.
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
19 #include <linux/errno.h>
20 #include <linux/module.h>
21 #include <linux/types.h>
22 #include <linux/socket.h>
23 #include <linux/kernel.h>
24 #include <linux/timer.h>
25 #include <linux/string.h>
26 #include <linux/sockios.h>
27 #include <linux/net.h>
28 #include <linux/fcntl.h>
30 #include <linux/slab.h>
31 #include <linux/interrupt.h>
32 #include <linux/capability.h>
33 #include <linux/skbuff.h>
34 #include <linux/init.h>
35 #include <linux/security.h>
36 #include <linux/mutex.h>
37 #include <linux/if_addr.h>
38 #include <linux/if_bridge.h>
39 #include <linux/pci.h>
40 #include <linux/etherdevice.h>
42 #include <asm/uaccess.h>
44 #include <linux/inet.h>
45 #include <linux/netdevice.h>
47 #include <net/protocol.h>
49 #include <net/route.h>
52 #include <net/pkt_sched.h>
53 #include <net/fib_rules.h>
54 #include <net/rtnetlink.h>
55 #include <net/net_namespace.h>
59 rtnl_dumpit_func dumpit;
60 rtnl_calcit_func calcit;
63 static DEFINE_MUTEX(rtnl_mutex);
67 mutex_lock(&rtnl_mutex);
69 EXPORT_SYMBOL(rtnl_lock);
71 void __rtnl_unlock(void)
73 mutex_unlock(&rtnl_mutex);
76 void rtnl_unlock(void)
78 /* This fellow will unlock it for us. */
81 EXPORT_SYMBOL(rtnl_unlock);
83 int rtnl_trylock(void)
85 return mutex_trylock(&rtnl_mutex);
87 EXPORT_SYMBOL(rtnl_trylock);
89 int rtnl_is_locked(void)
91 return mutex_is_locked(&rtnl_mutex);
93 EXPORT_SYMBOL(rtnl_is_locked);
95 #ifdef CONFIG_PROVE_LOCKING
96 int lockdep_rtnl_is_held(void)
98 return lockdep_is_held(&rtnl_mutex);
100 EXPORT_SYMBOL(lockdep_rtnl_is_held);
101 #endif /* #ifdef CONFIG_PROVE_LOCKING */
103 static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
105 static inline int rtm_msgindex(int msgtype)
107 int msgindex = msgtype - RTM_BASE;
110 * msgindex < 0 implies someone tried to register a netlink
111 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
112 * the message type has not been added to linux/rtnetlink.h
114 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
119 static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
121 struct rtnl_link *tab;
123 if (protocol <= RTNL_FAMILY_MAX)
124 tab = rtnl_msg_handlers[protocol];
128 if (tab == NULL || tab[msgindex].doit == NULL)
129 tab = rtnl_msg_handlers[PF_UNSPEC];
131 return tab[msgindex].doit;
134 static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
136 struct rtnl_link *tab;
138 if (protocol <= RTNL_FAMILY_MAX)
139 tab = rtnl_msg_handlers[protocol];
143 if (tab == NULL || tab[msgindex].dumpit == NULL)
144 tab = rtnl_msg_handlers[PF_UNSPEC];
146 return tab[msgindex].dumpit;
149 static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
151 struct rtnl_link *tab;
153 if (protocol <= RTNL_FAMILY_MAX)
154 tab = rtnl_msg_handlers[protocol];
158 if (tab == NULL || tab[msgindex].calcit == NULL)
159 tab = rtnl_msg_handlers[PF_UNSPEC];
161 return tab[msgindex].calcit;
165 * __rtnl_register - Register a rtnetlink message type
166 * @protocol: Protocol family or PF_UNSPEC
167 * @msgtype: rtnetlink message type
168 * @doit: Function pointer called for each request message
169 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
170 * @calcit: Function pointer to calc size of dump message
172 * Registers the specified function pointers (at least one of them has
173 * to be non-NULL) to be called whenever a request message for the
174 * specified protocol family and message type is received.
176 * The special protocol family PF_UNSPEC may be used to define fallback
177 * function pointers for the case when no entry for the specific protocol
180 * Returns 0 on success or a negative error code.
182 int __rtnl_register(int protocol, int msgtype,
183 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
184 rtnl_calcit_func calcit)
186 struct rtnl_link *tab;
189 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
190 msgindex = rtm_msgindex(msgtype);
192 tab = rtnl_msg_handlers[protocol];
194 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
198 rtnl_msg_handlers[protocol] = tab;
202 tab[msgindex].doit = doit;
205 tab[msgindex].dumpit = dumpit;
208 tab[msgindex].calcit = calcit;
212 EXPORT_SYMBOL_GPL(__rtnl_register);
215 * rtnl_register - Register a rtnetlink message type
217 * Identical to __rtnl_register() but panics on failure. This is useful
218 * as failure of this function is very unlikely, it can only happen due
219 * to lack of memory when allocating the chain to store all message
220 * handlers for a protocol. Meant for use in init functions where lack
221 * of memory implies no sense in continuing.
223 void rtnl_register(int protocol, int msgtype,
224 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
225 rtnl_calcit_func calcit)
227 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
228 panic("Unable to register rtnetlink message handler, "
229 "protocol = %d, message type = %d\n",
232 EXPORT_SYMBOL_GPL(rtnl_register);
235 * rtnl_unregister - Unregister a rtnetlink message type
236 * @protocol: Protocol family or PF_UNSPEC
237 * @msgtype: rtnetlink message type
239 * Returns 0 on success or a negative error code.
241 int rtnl_unregister(int protocol, int msgtype)
245 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
246 msgindex = rtm_msgindex(msgtype);
248 if (rtnl_msg_handlers[protocol] == NULL)
251 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
252 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
256 EXPORT_SYMBOL_GPL(rtnl_unregister);
259 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
260 * @protocol : Protocol family or PF_UNSPEC
262 * Identical to calling rtnl_unregster() for all registered message types
263 * of a certain protocol family.
265 void rtnl_unregister_all(int protocol)
267 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
269 kfree(rtnl_msg_handlers[protocol]);
270 rtnl_msg_handlers[protocol] = NULL;
272 EXPORT_SYMBOL_GPL(rtnl_unregister_all);
274 static LIST_HEAD(link_ops);
276 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
278 const struct rtnl_link_ops *ops;
280 list_for_each_entry(ops, &link_ops, list) {
281 if (!strcmp(ops->kind, kind))
288 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
289 * @ops: struct rtnl_link_ops * to register
291 * The caller must hold the rtnl_mutex. This function should be used
292 * by drivers that create devices during module initialization. It
293 * must be called before registering the devices.
295 * Returns 0 on success or a negative error code.
297 int __rtnl_link_register(struct rtnl_link_ops *ops)
299 if (rtnl_link_ops_get(ops->kind))
303 ops->dellink = unregister_netdevice_queue;
305 list_add_tail(&ops->list, &link_ops);
308 EXPORT_SYMBOL_GPL(__rtnl_link_register);
311 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
312 * @ops: struct rtnl_link_ops * to register
314 * Returns 0 on success or a negative error code.
316 int rtnl_link_register(struct rtnl_link_ops *ops)
321 err = __rtnl_link_register(ops);
325 EXPORT_SYMBOL_GPL(rtnl_link_register);
327 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
329 struct net_device *dev;
330 LIST_HEAD(list_kill);
332 for_each_netdev(net, dev) {
333 if (dev->rtnl_link_ops == ops)
334 ops->dellink(dev, &list_kill);
336 unregister_netdevice_many(&list_kill);
340 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
341 * @ops: struct rtnl_link_ops * to unregister
343 * The caller must hold the rtnl_mutex.
345 void __rtnl_link_unregister(struct rtnl_link_ops *ops)
350 __rtnl_kill_links(net, ops);
352 list_del(&ops->list);
354 EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
357 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
358 * @ops: struct rtnl_link_ops * to unregister
360 void rtnl_link_unregister(struct rtnl_link_ops *ops)
363 __rtnl_link_unregister(ops);
366 EXPORT_SYMBOL_GPL(rtnl_link_unregister);
368 static size_t rtnl_link_get_size(const struct net_device *dev)
370 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
376 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
377 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
380 /* IFLA_INFO_DATA + nested data */
381 size += nla_total_size(sizeof(struct nlattr)) +
384 if (ops->get_xstats_size)
385 /* IFLA_INFO_XSTATS */
386 size += nla_total_size(ops->get_xstats_size(dev));
391 static LIST_HEAD(rtnl_af_ops);
393 static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
395 const struct rtnl_af_ops *ops;
397 list_for_each_entry(ops, &rtnl_af_ops, list) {
398 if (ops->family == family)
406 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
407 * @ops: struct rtnl_af_ops * to register
409 * Returns 0 on success or a negative error code.
411 void rtnl_af_register(struct rtnl_af_ops *ops)
414 list_add_tail(&ops->list, &rtnl_af_ops);
417 EXPORT_SYMBOL_GPL(rtnl_af_register);
420 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
421 * @ops: struct rtnl_af_ops * to unregister
423 * The caller must hold the rtnl_mutex.
425 void __rtnl_af_unregister(struct rtnl_af_ops *ops)
427 list_del(&ops->list);
429 EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
432 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
433 * @ops: struct rtnl_af_ops * to unregister
435 void rtnl_af_unregister(struct rtnl_af_ops *ops)
438 __rtnl_af_unregister(ops);
441 EXPORT_SYMBOL_GPL(rtnl_af_unregister);
443 static size_t rtnl_link_get_af_size(const struct net_device *dev)
445 struct rtnl_af_ops *af_ops;
449 size = nla_total_size(sizeof(struct nlattr));
451 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
452 if (af_ops->get_link_af_size) {
453 /* AF_* + nested data */
454 size += nla_total_size(sizeof(struct nlattr)) +
455 af_ops->get_link_af_size(dev);
462 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
464 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
465 struct nlattr *linkinfo, *data;
468 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
469 if (linkinfo == NULL)
472 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
473 goto err_cancel_link;
474 if (ops->fill_xstats) {
475 err = ops->fill_xstats(skb, dev);
477 goto err_cancel_link;
479 if (ops->fill_info) {
480 data = nla_nest_start(skb, IFLA_INFO_DATA);
483 goto err_cancel_link;
485 err = ops->fill_info(skb, dev);
487 goto err_cancel_data;
488 nla_nest_end(skb, data);
491 nla_nest_end(skb, linkinfo);
495 nla_nest_cancel(skb, data);
497 nla_nest_cancel(skb, linkinfo);
502 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
504 struct sock *rtnl = net->rtnl;
507 NETLINK_CB(skb).dst_group = group;
509 atomic_inc(&skb->users);
510 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
512 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
516 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
518 struct sock *rtnl = net->rtnl;
520 return nlmsg_unicast(rtnl, skb, pid);
522 EXPORT_SYMBOL(rtnl_unicast);
524 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
525 struct nlmsghdr *nlh, gfp_t flags)
527 struct sock *rtnl = net->rtnl;
531 report = nlmsg_report(nlh);
533 nlmsg_notify(rtnl, skb, pid, group, report, flags);
535 EXPORT_SYMBOL(rtnl_notify);
537 void rtnl_set_sk_err(struct net *net, u32 group, int error)
539 struct sock *rtnl = net->rtnl;
541 netlink_set_err(rtnl, 0, group, error);
543 EXPORT_SYMBOL(rtnl_set_sk_err);
545 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
550 mx = nla_nest_start(skb, RTA_METRICS);
554 for (i = 0; i < RTAX_MAX; i++) {
557 if (nla_put_u32(skb, i+1, metrics[i]))
558 goto nla_put_failure;
563 nla_nest_cancel(skb, mx);
567 return nla_nest_end(skb, mx);
570 nla_nest_cancel(skb, mx);
573 EXPORT_SYMBOL(rtnetlink_put_metrics);
575 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
576 long expires, u32 error)
578 struct rta_cacheinfo ci = {
579 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
580 .rta_used = dst->__use,
581 .rta_clntref = atomic_read(&(dst->__refcnt)),
589 clock = jiffies_to_clock_t(abs(expires));
590 clock = min_t(unsigned long, clock, INT_MAX);
591 ci.rta_expires = (expires > 0) ? clock : -clock;
593 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
595 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
597 static void set_operstate(struct net_device *dev, unsigned char transition)
599 unsigned char operstate = dev->operstate;
601 switch (transition) {
603 if ((operstate == IF_OPER_DORMANT ||
604 operstate == IF_OPER_UNKNOWN) &&
606 operstate = IF_OPER_UP;
609 case IF_OPER_DORMANT:
610 if (operstate == IF_OPER_UP ||
611 operstate == IF_OPER_UNKNOWN)
612 operstate = IF_OPER_DORMANT;
616 if (dev->operstate != operstate) {
617 write_lock_bh(&dev_base_lock);
618 dev->operstate = operstate;
619 write_unlock_bh(&dev_base_lock);
620 netdev_state_change(dev);
624 static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
626 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
627 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
630 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
631 const struct ifinfomsg *ifm)
633 unsigned int flags = ifm->ifi_flags;
635 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
637 flags = (flags & ifm->ifi_change) |
638 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
643 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
644 const struct rtnl_link_stats64 *b)
646 a->rx_packets = b->rx_packets;
647 a->tx_packets = b->tx_packets;
648 a->rx_bytes = b->rx_bytes;
649 a->tx_bytes = b->tx_bytes;
650 a->rx_errors = b->rx_errors;
651 a->tx_errors = b->tx_errors;
652 a->rx_dropped = b->rx_dropped;
653 a->tx_dropped = b->tx_dropped;
655 a->multicast = b->multicast;
656 a->collisions = b->collisions;
658 a->rx_length_errors = b->rx_length_errors;
659 a->rx_over_errors = b->rx_over_errors;
660 a->rx_crc_errors = b->rx_crc_errors;
661 a->rx_frame_errors = b->rx_frame_errors;
662 a->rx_fifo_errors = b->rx_fifo_errors;
663 a->rx_missed_errors = b->rx_missed_errors;
665 a->tx_aborted_errors = b->tx_aborted_errors;
666 a->tx_carrier_errors = b->tx_carrier_errors;
667 a->tx_fifo_errors = b->tx_fifo_errors;
668 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
669 a->tx_window_errors = b->tx_window_errors;
671 a->rx_compressed = b->rx_compressed;
672 a->tx_compressed = b->tx_compressed;
675 static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
677 memcpy(v, b, sizeof(*b));
681 static inline int rtnl_vfinfo_size(const struct net_device *dev,
684 if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
685 (ext_filter_mask & RTEXT_FILTER_VF)) {
686 int num_vfs = dev_num_vf(dev->dev.parent);
687 size_t size = nla_total_size(sizeof(struct nlattr));
688 size += nla_total_size(num_vfs * sizeof(struct nlattr));
690 (nla_total_size(sizeof(struct ifla_vf_mac)) +
691 nla_total_size(sizeof(struct ifla_vf_vlan)) +
692 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
693 nla_total_size(sizeof(struct ifla_vf_spoofchk)));
699 static size_t rtnl_port_size(const struct net_device *dev)
701 size_t port_size = nla_total_size(4) /* PORT_VF */
702 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
703 + nla_total_size(sizeof(struct ifla_port_vsi))
705 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
706 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
707 + nla_total_size(1) /* PROT_VDP_REQUEST */
708 + nla_total_size(2); /* PORT_VDP_RESPONSE */
709 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
710 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
712 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
715 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
717 if (dev_num_vf(dev->dev.parent))
718 return port_self_size + vf_ports_size +
719 vf_port_size * dev_num_vf(dev->dev.parent);
721 return port_self_size;
724 static noinline size_t if_nlmsg_size(const struct net_device *dev,
727 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
728 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
729 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
730 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
731 + nla_total_size(sizeof(struct rtnl_link_ifmap))
732 + nla_total_size(sizeof(struct rtnl_link_stats))
733 + nla_total_size(sizeof(struct rtnl_link_stats64))
734 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
735 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
736 + nla_total_size(4) /* IFLA_TXQLEN */
737 + nla_total_size(4) /* IFLA_WEIGHT */
738 + nla_total_size(4) /* IFLA_MTU */
739 + nla_total_size(4) /* IFLA_LINK */
740 + nla_total_size(4) /* IFLA_MASTER */
741 + nla_total_size(1) /* IFLA_CARRIER */
742 + nla_total_size(4) /* IFLA_PROMISCUITY */
743 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
744 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
745 + nla_total_size(1) /* IFLA_OPERSTATE */
746 + nla_total_size(1) /* IFLA_LINKMODE */
747 + nla_total_size(ext_filter_mask
748 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
749 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
750 + rtnl_port_size(dev) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
751 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
752 + rtnl_link_get_af_size(dev) /* IFLA_AF_SPEC */
753 + nla_total_size(MAX_PHYS_PORT_ID_LEN); /* IFLA_PHYS_PORT_ID */
756 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
758 struct nlattr *vf_ports;
759 struct nlattr *vf_port;
763 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
767 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
768 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
770 goto nla_put_failure;
771 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
772 goto nla_put_failure;
773 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
774 if (err == -EMSGSIZE)
775 goto nla_put_failure;
777 nla_nest_cancel(skb, vf_port);
780 nla_nest_end(skb, vf_port);
783 nla_nest_end(skb, vf_ports);
788 nla_nest_cancel(skb, vf_ports);
792 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
794 struct nlattr *port_self;
797 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
801 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
803 nla_nest_cancel(skb, port_self);
804 return (err == -EMSGSIZE) ? err : 0;
807 nla_nest_end(skb, port_self);
812 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev)
816 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
819 err = rtnl_port_self_fill(skb, dev);
823 if (dev_num_vf(dev->dev.parent)) {
824 err = rtnl_vf_ports_fill(skb, dev);
832 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
835 struct netdev_phys_port_id ppid;
837 err = dev_get_phys_port_id(dev, &ppid);
839 if (err == -EOPNOTSUPP)
844 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
850 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
851 int type, u32 pid, u32 seq, u32 change,
852 unsigned int flags, u32 ext_filter_mask)
854 struct ifinfomsg *ifm;
855 struct nlmsghdr *nlh;
856 struct rtnl_link_stats64 temp;
857 const struct rtnl_link_stats64 *stats;
858 struct nlattr *attr, *af_spec;
859 struct rtnl_af_ops *af_ops;
860 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
863 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
867 ifm = nlmsg_data(nlh);
868 ifm->ifi_family = AF_UNSPEC;
870 ifm->ifi_type = dev->type;
871 ifm->ifi_index = dev->ifindex;
872 ifm->ifi_flags = dev_get_flags(dev);
873 ifm->ifi_change = change;
875 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
876 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
877 nla_put_u8(skb, IFLA_OPERSTATE,
878 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
879 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
880 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
881 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
882 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
883 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
885 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
887 (dev->ifindex != dev->iflink &&
888 nla_put_u32(skb, IFLA_LINK, dev->iflink)) ||
890 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
891 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
893 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
895 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)))
896 goto nla_put_failure;
899 struct rtnl_link_ifmap map = {
900 .mem_start = dev->mem_start,
901 .mem_end = dev->mem_end,
902 .base_addr = dev->base_addr,
905 .port = dev->if_port,
907 if (nla_put(skb, IFLA_MAP, sizeof(map), &map))
908 goto nla_put_failure;
912 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
913 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
914 goto nla_put_failure;
917 if (rtnl_phys_port_id_fill(skb, dev))
918 goto nla_put_failure;
920 attr = nla_reserve(skb, IFLA_STATS,
921 sizeof(struct rtnl_link_stats));
923 goto nla_put_failure;
925 stats = dev_get_stats(dev, &temp);
926 copy_rtnl_link_stats(nla_data(attr), stats);
928 attr = nla_reserve(skb, IFLA_STATS64,
929 sizeof(struct rtnl_link_stats64));
931 goto nla_put_failure;
932 copy_rtnl_link_stats64(nla_data(attr), stats);
934 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
935 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
936 goto nla_put_failure;
938 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent
939 && (ext_filter_mask & RTEXT_FILTER_VF)) {
942 struct nlattr *vfinfo, *vf;
943 int num_vfs = dev_num_vf(dev->dev.parent);
945 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
947 goto nla_put_failure;
948 for (i = 0; i < num_vfs; i++) {
949 struct ifla_vf_info ivi;
950 struct ifla_vf_mac vf_mac;
951 struct ifla_vf_vlan vf_vlan;
952 struct ifla_vf_tx_rate vf_tx_rate;
953 struct ifla_vf_spoofchk vf_spoofchk;
954 struct ifla_vf_link_state vf_linkstate;
957 * Not all SR-IOV capable drivers support the
958 * spoofcheck query. Preset to -1 so the user
959 * space tool can detect that the driver didn't
963 memset(ivi.mac, 0, sizeof(ivi.mac));
964 /* The default value for VF link state is "auto"
965 * IFLA_VF_LINK_STATE_AUTO which equals zero
968 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
974 vf_linkstate.vf = ivi.vf;
976 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
977 vf_vlan.vlan = ivi.vlan;
978 vf_vlan.qos = ivi.qos;
979 vf_tx_rate.rate = ivi.tx_rate;
980 vf_spoofchk.setting = ivi.spoofchk;
981 vf_linkstate.link_state = ivi.linkstate;
982 vf = nla_nest_start(skb, IFLA_VF_INFO);
984 nla_nest_cancel(skb, vfinfo);
985 goto nla_put_failure;
987 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
988 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
989 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
991 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
993 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
995 goto nla_put_failure;
996 nla_nest_end(skb, vf);
998 nla_nest_end(skb, vfinfo);
1001 if (rtnl_port_fill(skb, dev))
1002 goto nla_put_failure;
1004 if (dev->rtnl_link_ops) {
1005 if (rtnl_link_fill(skb, dev) < 0)
1006 goto nla_put_failure;
1009 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1010 goto nla_put_failure;
1012 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1013 if (af_ops->fill_link_af) {
1017 if (!(af = nla_nest_start(skb, af_ops->family)))
1018 goto nla_put_failure;
1020 err = af_ops->fill_link_af(skb, dev);
1023 * Caller may return ENODATA to indicate that there
1024 * was no data to be dumped. This is not an error, it
1025 * means we should trim the attribute header and
1028 if (err == -ENODATA)
1029 nla_nest_cancel(skb, af);
1031 goto nla_put_failure;
1033 nla_nest_end(skb, af);
1037 nla_nest_end(skb, af_spec);
1039 return nlmsg_end(skb, nlh);
1042 nlmsg_cancel(skb, nlh);
1046 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1048 struct net *net = sock_net(skb->sk);
1051 struct net_device *dev;
1052 struct hlist_head *head;
1053 struct nlattr *tb[IFLA_MAX+1];
1054 u32 ext_filter_mask = 0;
1057 s_idx = cb->args[1];
1060 cb->seq = net->dev_base_seq;
1062 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
1063 ifla_policy) >= 0) {
1065 if (tb[IFLA_EXT_MASK])
1066 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1069 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1071 head = &net->dev_index_head[h];
1072 hlist_for_each_entry_rcu(dev, head, index_hlist) {
1075 if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1076 NETLINK_CB(cb->skb).portid,
1077 cb->nlh->nlmsg_seq, 0,
1079 ext_filter_mask) <= 0)
1082 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1095 const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1096 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1097 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1098 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1099 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1100 [IFLA_MTU] = { .type = NLA_U32 },
1101 [IFLA_LINK] = { .type = NLA_U32 },
1102 [IFLA_MASTER] = { .type = NLA_U32 },
1103 [IFLA_CARRIER] = { .type = NLA_U8 },
1104 [IFLA_TXQLEN] = { .type = NLA_U32 },
1105 [IFLA_WEIGHT] = { .type = NLA_U32 },
1106 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1107 [IFLA_LINKMODE] = { .type = NLA_U8 },
1108 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1109 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1110 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1111 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1112 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1113 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1114 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1115 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1116 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1117 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1118 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1119 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1120 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_PORT_ID_LEN },
1122 EXPORT_SYMBOL(ifla_policy);
1124 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1125 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1126 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1129 static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
1130 [IFLA_VF_INFO] = { .type = NLA_NESTED },
1133 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1134 [IFLA_VF_MAC] = { .type = NLA_BINARY,
1135 .len = sizeof(struct ifla_vf_mac) },
1136 [IFLA_VF_VLAN] = { .type = NLA_BINARY,
1137 .len = sizeof(struct ifla_vf_vlan) },
1138 [IFLA_VF_TX_RATE] = { .type = NLA_BINARY,
1139 .len = sizeof(struct ifla_vf_tx_rate) },
1140 [IFLA_VF_SPOOFCHK] = { .type = NLA_BINARY,
1141 .len = sizeof(struct ifla_vf_spoofchk) },
1144 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1145 [IFLA_PORT_VF] = { .type = NLA_U32 },
1146 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1147 .len = PORT_PROFILE_MAX },
1148 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1149 .len = sizeof(struct ifla_port_vsi)},
1150 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1151 .len = PORT_UUID_MAX },
1152 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1153 .len = PORT_UUID_MAX },
1154 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1155 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1158 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1161 /* Examine the link attributes and figure out which
1162 * network namespace we are talking about.
1164 if (tb[IFLA_NET_NS_PID])
1165 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1166 else if (tb[IFLA_NET_NS_FD])
1167 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1169 net = get_net(src_net);
1172 EXPORT_SYMBOL(rtnl_link_get_net);
1174 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1177 if (tb[IFLA_ADDRESS] &&
1178 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1181 if (tb[IFLA_BROADCAST] &&
1182 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1186 if (tb[IFLA_AF_SPEC]) {
1190 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1191 const struct rtnl_af_ops *af_ops;
1193 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1194 return -EAFNOSUPPORT;
1196 if (!af_ops->set_link_af)
1199 if (af_ops->validate_link_af) {
1200 err = af_ops->validate_link_af(dev, af);
1210 static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
1212 int rem, err = -EINVAL;
1214 const struct net_device_ops *ops = dev->netdev_ops;
1216 nla_for_each_nested(vf, attr, rem) {
1217 switch (nla_type(vf)) {
1219 struct ifla_vf_mac *ivm;
1222 if (ops->ndo_set_vf_mac)
1223 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1227 case IFLA_VF_VLAN: {
1228 struct ifla_vf_vlan *ivv;
1231 if (ops->ndo_set_vf_vlan)
1232 err = ops->ndo_set_vf_vlan(dev, ivv->vf,
1237 case IFLA_VF_TX_RATE: {
1238 struct ifla_vf_tx_rate *ivt;
1241 if (ops->ndo_set_vf_tx_rate)
1242 err = ops->ndo_set_vf_tx_rate(dev, ivt->vf,
1246 case IFLA_VF_SPOOFCHK: {
1247 struct ifla_vf_spoofchk *ivs;
1250 if (ops->ndo_set_vf_spoofchk)
1251 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1255 case IFLA_VF_LINK_STATE: {
1256 struct ifla_vf_link_state *ivl;
1259 if (ops->ndo_set_vf_link_state)
1260 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1274 static int do_set_master(struct net_device *dev, int ifindex)
1276 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1277 const struct net_device_ops *ops;
1281 if (upper_dev->ifindex == ifindex)
1283 ops = upper_dev->netdev_ops;
1284 if (ops->ndo_del_slave) {
1285 err = ops->ndo_del_slave(upper_dev, dev);
1294 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1297 ops = upper_dev->netdev_ops;
1298 if (ops->ndo_add_slave) {
1299 err = ops->ndo_add_slave(upper_dev, dev);
1309 static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
1310 struct nlattr **tb, char *ifname, int modified)
1312 const struct net_device_ops *ops = dev->netdev_ops;
1315 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
1316 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1321 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) {
1325 err = dev_change_net_namespace(dev, net, ifname);
1333 struct rtnl_link_ifmap *u_map;
1336 if (!ops->ndo_set_config) {
1341 if (!netif_device_present(dev)) {
1346 u_map = nla_data(tb[IFLA_MAP]);
1347 k_map.mem_start = (unsigned long) u_map->mem_start;
1348 k_map.mem_end = (unsigned long) u_map->mem_end;
1349 k_map.base_addr = (unsigned short) u_map->base_addr;
1350 k_map.irq = (unsigned char) u_map->irq;
1351 k_map.dma = (unsigned char) u_map->dma;
1352 k_map.port = (unsigned char) u_map->port;
1354 err = ops->ndo_set_config(dev, &k_map);
1361 if (tb[IFLA_ADDRESS]) {
1362 struct sockaddr *sa;
1365 len = sizeof(sa_family_t) + dev->addr_len;
1366 sa = kmalloc(len, GFP_KERNEL);
1371 sa->sa_family = dev->type;
1372 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1374 err = dev_set_mac_address(dev, sa);
1382 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1388 if (tb[IFLA_GROUP]) {
1389 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1394 * Interface selected by interface index but interface
1395 * name provided implies that a name change has been
1398 if (ifm->ifi_index > 0 && ifname[0]) {
1399 err = dev_change_name(dev, ifname);
1405 if (tb[IFLA_IFALIAS]) {
1406 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1407 nla_len(tb[IFLA_IFALIAS]));
1413 if (tb[IFLA_BROADCAST]) {
1414 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1415 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1418 if (ifm->ifi_flags || ifm->ifi_change) {
1419 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1424 if (tb[IFLA_MASTER]) {
1425 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1431 if (tb[IFLA_CARRIER]) {
1432 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
1438 if (tb[IFLA_TXQLEN])
1439 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1441 if (tb[IFLA_OPERSTATE])
1442 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1444 if (tb[IFLA_LINKMODE]) {
1445 write_lock_bh(&dev_base_lock);
1446 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1447 write_unlock_bh(&dev_base_lock);
1450 if (tb[IFLA_VFINFO_LIST]) {
1451 struct nlattr *attr;
1453 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
1454 if (nla_type(attr) != IFLA_VF_INFO) {
1458 err = do_setvfinfo(dev, attr);
1466 if (tb[IFLA_VF_PORTS]) {
1467 struct nlattr *port[IFLA_PORT_MAX+1];
1468 struct nlattr *attr;
1473 if (!ops->ndo_set_vf_port)
1476 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1477 if (nla_type(attr) != IFLA_VF_PORT)
1479 err = nla_parse_nested(port, IFLA_PORT_MAX,
1480 attr, ifla_port_policy);
1483 if (!port[IFLA_PORT_VF]) {
1487 vf = nla_get_u32(port[IFLA_PORT_VF]);
1488 err = ops->ndo_set_vf_port(dev, vf, port);
1496 if (tb[IFLA_PORT_SELF]) {
1497 struct nlattr *port[IFLA_PORT_MAX+1];
1499 err = nla_parse_nested(port, IFLA_PORT_MAX,
1500 tb[IFLA_PORT_SELF], ifla_port_policy);
1505 if (ops->ndo_set_vf_port)
1506 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1512 if (tb[IFLA_AF_SPEC]) {
1516 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1517 const struct rtnl_af_ops *af_ops;
1519 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1522 err = af_ops->set_link_af(dev, af);
1532 if (err < 0 && modified)
1533 net_warn_ratelimited("A link change request failed with some changes committed already. Interface %s may have been left with an inconsistent configuration, please check.\n",
1539 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
1541 struct net *net = sock_net(skb->sk);
1542 struct ifinfomsg *ifm;
1543 struct net_device *dev;
1545 struct nlattr *tb[IFLA_MAX+1];
1546 char ifname[IFNAMSIZ];
1548 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1552 if (tb[IFLA_IFNAME])
1553 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1558 ifm = nlmsg_data(nlh);
1559 if (ifm->ifi_index > 0)
1560 dev = __dev_get_by_index(net, ifm->ifi_index);
1561 else if (tb[IFLA_IFNAME])
1562 dev = __dev_get_by_name(net, ifname);
1571 err = validate_linkmsg(dev, tb);
1575 err = do_setlink(dev, ifm, tb, ifname, 0);
1580 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
1582 struct net *net = sock_net(skb->sk);
1583 const struct rtnl_link_ops *ops;
1584 struct net_device *dev;
1585 struct ifinfomsg *ifm;
1586 char ifname[IFNAMSIZ];
1587 struct nlattr *tb[IFLA_MAX+1];
1589 LIST_HEAD(list_kill);
1591 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1595 if (tb[IFLA_IFNAME])
1596 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1598 ifm = nlmsg_data(nlh);
1599 if (ifm->ifi_index > 0)
1600 dev = __dev_get_by_index(net, ifm->ifi_index);
1601 else if (tb[IFLA_IFNAME])
1602 dev = __dev_get_by_name(net, ifname);
1609 ops = dev->rtnl_link_ops;
1613 ops->dellink(dev, &list_kill);
1614 unregister_netdevice_many(&list_kill);
1615 list_del(&list_kill);
1619 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
1621 unsigned int old_flags;
1624 old_flags = dev->flags;
1625 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
1626 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1631 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
1633 __dev_notify_flags(dev, old_flags, ~0U);
1636 EXPORT_SYMBOL(rtnl_configure_link);
1638 struct net_device *rtnl_create_link(struct net *net,
1639 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
1642 struct net_device *dev;
1643 unsigned int num_tx_queues = 1;
1644 unsigned int num_rx_queues = 1;
1646 if (tb[IFLA_NUM_TX_QUEUES])
1647 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
1648 else if (ops->get_num_tx_queues)
1649 num_tx_queues = ops->get_num_tx_queues();
1651 if (tb[IFLA_NUM_RX_QUEUES])
1652 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
1653 else if (ops->get_num_rx_queues)
1654 num_rx_queues = ops->get_num_rx_queues();
1657 dev = alloc_netdev_mqs(ops->priv_size, ifname, ops->setup,
1658 num_tx_queues, num_rx_queues);
1662 dev_net_set(dev, net);
1663 dev->rtnl_link_ops = ops;
1664 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
1667 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
1668 if (tb[IFLA_ADDRESS]) {
1669 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
1670 nla_len(tb[IFLA_ADDRESS]));
1671 dev->addr_assign_type = NET_ADDR_SET;
1673 if (tb[IFLA_BROADCAST])
1674 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
1675 nla_len(tb[IFLA_BROADCAST]));
1676 if (tb[IFLA_TXQLEN])
1677 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1678 if (tb[IFLA_OPERSTATE])
1679 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1680 if (tb[IFLA_LINKMODE])
1681 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1683 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1688 return ERR_PTR(err);
1690 EXPORT_SYMBOL(rtnl_create_link);
1692 static int rtnl_group_changelink(struct net *net, int group,
1693 struct ifinfomsg *ifm,
1696 struct net_device *dev;
1699 for_each_netdev(net, dev) {
1700 if (dev->group == group) {
1701 err = do_setlink(dev, ifm, tb, NULL, 0);
1710 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
1712 struct net *net = sock_net(skb->sk);
1713 const struct rtnl_link_ops *ops;
1714 struct net_device *dev;
1715 struct ifinfomsg *ifm;
1716 char kind[MODULE_NAME_LEN];
1717 char ifname[IFNAMSIZ];
1718 struct nlattr *tb[IFLA_MAX+1];
1719 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
1722 #ifdef CONFIG_MODULES
1725 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1729 if (tb[IFLA_IFNAME])
1730 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1734 ifm = nlmsg_data(nlh);
1735 if (ifm->ifi_index > 0)
1736 dev = __dev_get_by_index(net, ifm->ifi_index);
1739 dev = __dev_get_by_name(net, ifname);
1744 err = validate_linkmsg(dev, tb);
1748 if (tb[IFLA_LINKINFO]) {
1749 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
1750 tb[IFLA_LINKINFO], ifla_info_policy);
1754 memset(linkinfo, 0, sizeof(linkinfo));
1756 if (linkinfo[IFLA_INFO_KIND]) {
1757 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
1758 ops = rtnl_link_ops_get(kind);
1765 struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL;
1766 struct net *dest_net;
1769 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
1770 err = nla_parse_nested(attr, ops->maxtype,
1771 linkinfo[IFLA_INFO_DATA],
1777 if (ops->validate) {
1778 err = ops->validate(tb, data);
1787 if (nlh->nlmsg_flags & NLM_F_EXCL)
1789 if (nlh->nlmsg_flags & NLM_F_REPLACE)
1792 if (linkinfo[IFLA_INFO_DATA]) {
1793 if (!ops || ops != dev->rtnl_link_ops ||
1797 err = ops->changelink(dev, tb, data);
1803 return do_setlink(dev, ifm, tb, ifname, modified);
1806 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
1807 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
1808 return rtnl_group_changelink(net,
1809 nla_get_u32(tb[IFLA_GROUP]),
1814 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
1818 #ifdef CONFIG_MODULES
1821 request_module("rtnl-link-%s", kind);
1823 ops = rtnl_link_ops_get(kind);
1832 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
1834 dest_net = rtnl_link_get_net(net, tb);
1835 if (IS_ERR(dest_net))
1836 return PTR_ERR(dest_net);
1838 dev = rtnl_create_link(dest_net, ifname, ops, tb);
1844 dev->ifindex = ifm->ifi_index;
1847 err = ops->newlink(net, dev, tb, data);
1849 err = register_netdevice(dev);
1856 err = rtnl_configure_link(dev, ifm);
1858 unregister_netdevice(dev);
1865 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
1867 struct net *net = sock_net(skb->sk);
1868 struct ifinfomsg *ifm;
1869 char ifname[IFNAMSIZ];
1870 struct nlattr *tb[IFLA_MAX+1];
1871 struct net_device *dev = NULL;
1872 struct sk_buff *nskb;
1874 u32 ext_filter_mask = 0;
1876 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1880 if (tb[IFLA_IFNAME])
1881 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1883 if (tb[IFLA_EXT_MASK])
1884 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1886 ifm = nlmsg_data(nlh);
1887 if (ifm->ifi_index > 0)
1888 dev = __dev_get_by_index(net, ifm->ifi_index);
1889 else if (tb[IFLA_IFNAME])
1890 dev = __dev_get_by_name(net, ifname);
1897 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
1901 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
1902 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
1904 /* -EMSGSIZE implies BUG in if_nlmsg_size */
1905 WARN_ON(err == -EMSGSIZE);
1908 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
1913 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
1915 struct net *net = sock_net(skb->sk);
1916 struct net_device *dev;
1917 struct nlattr *tb[IFLA_MAX+1];
1918 u32 ext_filter_mask = 0;
1919 u16 min_ifinfo_dump_size = 0;
1921 if (nlmsg_parse(nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
1922 ifla_policy) >= 0) {
1923 if (tb[IFLA_EXT_MASK])
1924 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
1927 if (!ext_filter_mask)
1928 return NLMSG_GOODSIZE;
1930 * traverse the list of net devices and compute the minimum
1931 * buffer size based upon the filter mask.
1933 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
1934 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
1939 return min_ifinfo_dump_size;
1942 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1945 int s_idx = cb->family;
1949 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1950 int type = cb->nlh->nlmsg_type-RTM_BASE;
1951 if (idx < s_idx || idx == PF_PACKET)
1953 if (rtnl_msg_handlers[idx] == NULL ||
1954 rtnl_msg_handlers[idx][type].dumpit == NULL)
1957 memset(&cb->args[0], 0, sizeof(cb->args));
1961 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1969 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
1972 struct net *net = dev_net(dev);
1973 struct sk_buff *skb;
1975 size_t if_info_size;
1977 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
1981 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
1983 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
1984 WARN_ON(err == -EMSGSIZE);
1988 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
1992 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
1994 EXPORT_SYMBOL(rtmsg_ifinfo);
1996 static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
1997 struct net_device *dev,
1998 u8 *addr, u32 pid, u32 seq,
1999 int type, unsigned int flags)
2001 struct nlmsghdr *nlh;
2004 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), NLM_F_MULTI);
2008 ndm = nlmsg_data(nlh);
2009 ndm->ndm_family = AF_BRIDGE;
2012 ndm->ndm_flags = flags;
2014 ndm->ndm_ifindex = dev->ifindex;
2015 ndm->ndm_state = NUD_PERMANENT;
2017 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2018 goto nla_put_failure;
2020 return nlmsg_end(skb, nlh);
2023 nlmsg_cancel(skb, nlh);
2027 static inline size_t rtnl_fdb_nlmsg_size(void)
2029 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN);
2032 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type)
2034 struct net *net = dev_net(dev);
2035 struct sk_buff *skb;
2038 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2042 err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF);
2048 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2051 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2055 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2057 int ndo_dflt_fdb_add(struct ndmsg *ndm,
2058 struct nlattr *tb[],
2059 struct net_device *dev,
2060 const unsigned char *addr,
2065 /* If aging addresses are supported device will need to
2066 * implement its own handler for this.
2068 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2069 pr_info("%s: FDB only supports static addresses\n", dev->name);
2073 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2074 err = dev_uc_add_excl(dev, addr);
2075 else if (is_multicast_ether_addr(addr))
2076 err = dev_mc_add_excl(dev, addr);
2078 /* Only return duplicate errors if NLM_F_EXCL is set */
2079 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2084 EXPORT_SYMBOL(ndo_dflt_fdb_add);
2086 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
2088 struct net *net = sock_net(skb->sk);
2090 struct nlattr *tb[NDA_MAX+1];
2091 struct net_device *dev;
2095 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2099 ndm = nlmsg_data(nlh);
2100 if (ndm->ndm_ifindex == 0) {
2101 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2105 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2107 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2111 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2112 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2116 addr = nla_data(tb[NDA_LLADDR]);
2120 /* Support fdb on master device the net/bridge default case */
2121 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2122 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2123 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2124 const struct net_device_ops *ops = br_dev->netdev_ops;
2126 err = ops->ndo_fdb_add(ndm, tb, dev, addr, nlh->nlmsg_flags);
2130 ndm->ndm_flags &= ~NTF_MASTER;
2133 /* Embedded bridge, macvlan, and any other device support */
2134 if ((ndm->ndm_flags & NTF_SELF)) {
2135 if (dev->netdev_ops->ndo_fdb_add)
2136 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
2139 err = ndo_dflt_fdb_add(ndm, tb, dev, addr,
2143 rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH);
2144 ndm->ndm_flags &= ~NTF_SELF;
2152 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2154 int ndo_dflt_fdb_del(struct ndmsg *ndm,
2155 struct nlattr *tb[],
2156 struct net_device *dev,
2157 const unsigned char *addr)
2159 int err = -EOPNOTSUPP;
2161 /* If aging addresses are supported device will need to
2162 * implement its own handler for this.
2164 if (!(ndm->ndm_state & NUD_PERMANENT)) {
2165 pr_info("%s: FDB only supports static addresses\n", dev->name);
2169 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2170 err = dev_uc_del(dev, addr);
2171 else if (is_multicast_ether_addr(addr))
2172 err = dev_mc_del(dev, addr);
2178 EXPORT_SYMBOL(ndo_dflt_fdb_del);
2180 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
2182 struct net *net = sock_net(skb->sk);
2184 struct nlattr *tb[NDA_MAX+1];
2185 struct net_device *dev;
2189 if (!capable(CAP_NET_ADMIN))
2192 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2196 ndm = nlmsg_data(nlh);
2197 if (ndm->ndm_ifindex == 0) {
2198 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2202 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2204 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2208 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2209 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2213 addr = nla_data(tb[NDA_LLADDR]);
2217 /* Support fdb on master device the net/bridge default case */
2218 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2219 (dev->priv_flags & IFF_BRIDGE_PORT)) {
2220 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2221 const struct net_device_ops *ops = br_dev->netdev_ops;
2223 if (ops->ndo_fdb_del)
2224 err = ops->ndo_fdb_del(ndm, tb, dev, addr);
2229 ndm->ndm_flags &= ~NTF_MASTER;
2232 /* Embedded bridge, macvlan, and any other device support */
2233 if (ndm->ndm_flags & NTF_SELF) {
2234 if (dev->netdev_ops->ndo_fdb_del)
2235 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr);
2237 err = ndo_dflt_fdb_del(ndm, tb, dev, addr);
2240 rtnl_fdb_notify(dev, addr, RTM_DELNEIGH);
2241 ndm->ndm_flags &= ~NTF_SELF;
2248 static int nlmsg_populate_fdb(struct sk_buff *skb,
2249 struct netlink_callback *cb,
2250 struct net_device *dev,
2252 struct netdev_hw_addr_list *list)
2254 struct netdev_hw_addr *ha;
2258 portid = NETLINK_CB(cb->skb).portid;
2259 seq = cb->nlh->nlmsg_seq;
2261 list_for_each_entry(ha, &list->list, list) {
2262 if (*idx < cb->args[0])
2265 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr,
2267 RTM_NEWNEIGH, NTF_SELF);
2277 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
2278 * @nlh: netlink message header
2281 * Default netdevice operation to dump the existing unicast address list.
2282 * Returns number of addresses from list put in skb.
2284 int ndo_dflt_fdb_dump(struct sk_buff *skb,
2285 struct netlink_callback *cb,
2286 struct net_device *dev,
2291 netif_addr_lock_bh(dev);
2292 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc);
2295 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc);
2297 netif_addr_unlock_bh(dev);
2300 EXPORT_SYMBOL(ndo_dflt_fdb_dump);
2302 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
2305 struct net *net = sock_net(skb->sk);
2306 struct net_device *dev;
2309 for_each_netdev_rcu(net, dev) {
2310 if (dev->priv_flags & IFF_BRIDGE_PORT) {
2311 struct net_device *br_dev;
2312 const struct net_device_ops *ops;
2314 br_dev = netdev_master_upper_dev_get(dev);
2315 ops = br_dev->netdev_ops;
2316 if (ops->ndo_fdb_dump)
2317 idx = ops->ndo_fdb_dump(skb, cb, dev, idx);
2320 if (dev->netdev_ops->ndo_fdb_dump)
2321 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, idx);
2323 idx = ndo_dflt_fdb_dump(skb, cb, dev, idx);
2331 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2332 struct net_device *dev, u16 mode)
2334 struct nlmsghdr *nlh;
2335 struct ifinfomsg *ifm;
2336 struct nlattr *br_afspec;
2337 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
2338 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2340 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), NLM_F_MULTI);
2344 ifm = nlmsg_data(nlh);
2345 ifm->ifi_family = AF_BRIDGE;
2347 ifm->ifi_type = dev->type;
2348 ifm->ifi_index = dev->ifindex;
2349 ifm->ifi_flags = dev_get_flags(dev);
2350 ifm->ifi_change = 0;
2353 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
2354 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
2355 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
2357 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
2359 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
2360 (dev->ifindex != dev->iflink &&
2361 nla_put_u32(skb, IFLA_LINK, dev->iflink)))
2362 goto nla_put_failure;
2364 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
2366 goto nla_put_failure;
2368 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF) ||
2369 nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
2370 nla_nest_cancel(skb, br_afspec);
2371 goto nla_put_failure;
2373 nla_nest_end(skb, br_afspec);
2375 return nlmsg_end(skb, nlh);
2377 nlmsg_cancel(skb, nlh);
2380 EXPORT_SYMBOL(ndo_dflt_bridge_getlink);
2382 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
2384 struct net *net = sock_net(skb->sk);
2385 struct net_device *dev;
2387 u32 portid = NETLINK_CB(cb->skb).portid;
2388 u32 seq = cb->nlh->nlmsg_seq;
2389 struct nlattr *extfilt;
2390 u32 filter_mask = 0;
2392 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
2395 filter_mask = nla_get_u32(extfilt);
2398 for_each_netdev_rcu(net, dev) {
2399 const struct net_device_ops *ops = dev->netdev_ops;
2400 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2402 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
2403 if (idx >= cb->args[0] &&
2404 br_dev->netdev_ops->ndo_bridge_getlink(
2405 skb, portid, seq, dev, filter_mask) < 0)
2410 if (ops->ndo_bridge_getlink) {
2411 if (idx >= cb->args[0] &&
2412 ops->ndo_bridge_getlink(skb, portid, seq, dev,
2424 static inline size_t bridge_nlmsg_size(void)
2426 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
2427 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
2428 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
2429 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
2430 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
2431 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
2432 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
2433 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
2434 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
2435 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
2436 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
2439 static int rtnl_bridge_notify(struct net_device *dev, u16 flags)
2441 struct net *net = dev_net(dev);
2442 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2443 struct sk_buff *skb;
2444 int err = -EOPNOTSUPP;
2446 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
2452 if ((!flags || (flags & BRIDGE_FLAGS_MASTER)) &&
2453 br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
2454 err = br_dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0);
2459 if ((flags & BRIDGE_FLAGS_SELF) &&
2460 dev->netdev_ops->ndo_bridge_getlink) {
2461 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0);
2466 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
2469 WARN_ON(err == -EMSGSIZE);
2471 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2475 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
2477 struct net *net = sock_net(skb->sk);
2478 struct ifinfomsg *ifm;
2479 struct net_device *dev;
2480 struct nlattr *br_spec, *attr = NULL;
2481 int rem, err = -EOPNOTSUPP;
2482 u16 oflags, flags = 0;
2483 bool have_flags = false;
2485 if (nlmsg_len(nlh) < sizeof(*ifm))
2488 ifm = nlmsg_data(nlh);
2489 if (ifm->ifi_family != AF_BRIDGE)
2490 return -EPFNOSUPPORT;
2492 dev = __dev_get_by_index(net, ifm->ifi_index);
2494 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2498 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2500 nla_for_each_nested(attr, br_spec, rem) {
2501 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
2503 flags = nla_get_u16(attr);
2511 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
2512 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2514 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2519 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh);
2523 flags &= ~BRIDGE_FLAGS_MASTER;
2526 if ((flags & BRIDGE_FLAGS_SELF)) {
2527 if (!dev->netdev_ops->ndo_bridge_setlink)
2530 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh);
2533 flags &= ~BRIDGE_FLAGS_SELF;
2537 memcpy(nla_data(attr), &flags, sizeof(flags));
2538 /* Generate event to notify upper layer of bridge change */
2540 err = rtnl_bridge_notify(dev, oflags);
2545 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
2547 struct net *net = sock_net(skb->sk);
2548 struct ifinfomsg *ifm;
2549 struct net_device *dev;
2550 struct nlattr *br_spec, *attr = NULL;
2551 int rem, err = -EOPNOTSUPP;
2552 u16 oflags, flags = 0;
2553 bool have_flags = false;
2555 if (nlmsg_len(nlh) < sizeof(*ifm))
2558 ifm = nlmsg_data(nlh);
2559 if (ifm->ifi_family != AF_BRIDGE)
2560 return -EPFNOSUPPORT;
2562 dev = __dev_get_by_index(net, ifm->ifi_index);
2564 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2568 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2570 nla_for_each_nested(attr, br_spec, rem) {
2571 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
2573 flags = nla_get_u16(attr);
2581 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
2582 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
2584 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
2589 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh);
2593 flags &= ~BRIDGE_FLAGS_MASTER;
2596 if ((flags & BRIDGE_FLAGS_SELF)) {
2597 if (!dev->netdev_ops->ndo_bridge_dellink)
2600 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh);
2603 flags &= ~BRIDGE_FLAGS_SELF;
2607 memcpy(nla_data(attr), &flags, sizeof(flags));
2608 /* Generate event to notify upper layer of bridge change */
2610 err = rtnl_bridge_notify(dev, oflags);
2615 /* Process one rtnetlink message. */
2617 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
2619 struct net *net = sock_net(skb->sk);
2620 rtnl_doit_func doit;
2626 type = nlh->nlmsg_type;
2632 /* All the messages must have at least 1 byte length */
2633 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
2636 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
2640 if (kind != 2 && !ns_capable(net->user_ns, CAP_NET_ADMIN))
2643 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
2645 rtnl_dumpit_func dumpit;
2646 rtnl_calcit_func calcit;
2647 u16 min_dump_alloc = 0;
2649 dumpit = rtnl_get_dumpit(family, type);
2652 calcit = rtnl_get_calcit(family, type);
2654 min_dump_alloc = calcit(skb, nlh);
2659 struct netlink_dump_control c = {
2661 .min_dump_alloc = min_dump_alloc,
2663 err = netlink_dump_start(rtnl, skb, nlh, &c);
2669 doit = rtnl_get_doit(family, type);
2673 return doit(skb, nlh);
2676 static void rtnetlink_rcv(struct sk_buff *skb)
2679 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
2683 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
2685 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2691 case NETDEV_POST_INIT:
2692 case NETDEV_REGISTER:
2694 case NETDEV_PRE_TYPE_CHANGE:
2695 case NETDEV_GOING_DOWN:
2696 case NETDEV_UNREGISTER:
2697 case NETDEV_UNREGISTER_FINAL:
2698 case NETDEV_RELEASE:
2702 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
2708 static struct notifier_block rtnetlink_dev_notifier = {
2709 .notifier_call = rtnetlink_event,
2713 static int __net_init rtnetlink_net_init(struct net *net)
2716 struct netlink_kernel_cfg cfg = {
2717 .groups = RTNLGRP_MAX,
2718 .input = rtnetlink_rcv,
2719 .cb_mutex = &rtnl_mutex,
2720 .flags = NL_CFG_F_NONROOT_RECV,
2723 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
2730 static void __net_exit rtnetlink_net_exit(struct net *net)
2732 netlink_kernel_release(net->rtnl);
2736 static struct pernet_operations rtnetlink_net_ops = {
2737 .init = rtnetlink_net_init,
2738 .exit = rtnetlink_net_exit,
2741 void __init rtnetlink_init(void)
2743 if (register_pernet_subsys(&rtnetlink_net_ops))
2744 panic("rtnetlink_init: cannot initialize rtnetlink\n");
2746 register_netdevice_notifier(&rtnetlink_dev_notifier);
2748 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
2749 rtnl_dump_ifinfo, rtnl_calcit);
2750 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
2751 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
2752 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
2754 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
2755 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
2757 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
2758 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
2759 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
2761 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
2762 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
2763 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);