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1/*
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.
5 *
6 * Routing netlink socket interface: protocol independent part.
7 *
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
9 *
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.
14 *
15 * Fixes:
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
17 */
18
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>
29#include <linux/mm.h>
30#include <linux/slab.h>
31#include <linux/interrupt.h>
32#include <linux/capability.h>
33#include <linux/skbuff.h>
34#include <linux/init.h>
35#include <linux/security.h>
36#include <linux/mutex.h>
37#include <linux/if_addr.h>
38#include <linux/pci.h>
39
40#include <asm/uaccess.h>
41#include <asm/system.h>
42
43#include <linux/inet.h>
44#include <linux/netdevice.h>
45#include <net/ip.h>
46#include <net/protocol.h>
47#include <net/arp.h>
48#include <net/route.h>
49#include <net/udp.h>
50#include <net/sock.h>
51#include <net/pkt_sched.h>
52#include <net/fib_rules.h>
53#include <net/rtnetlink.h>
54#include <net/net_namespace.h>
55
56struct rtnl_link {
57 rtnl_doit_func doit;
58 rtnl_dumpit_func dumpit;
59 rtnl_calcit_func calcit;
60};
61
62static DEFINE_MUTEX(rtnl_mutex);
63static u16 min_ifinfo_dump_size;
64
65void rtnl_lock(void)
66{
67 mutex_lock(&rtnl_mutex);
68}
69EXPORT_SYMBOL(rtnl_lock);
70
71void __rtnl_unlock(void)
72{
73 mutex_unlock(&rtnl_mutex);
74}
75
76void rtnl_unlock(void)
77{
78 /* This fellow will unlock it for us. */
79 netdev_run_todo();
80}
81EXPORT_SYMBOL(rtnl_unlock);
82
83int rtnl_trylock(void)
84{
85 return mutex_trylock(&rtnl_mutex);
86}
87EXPORT_SYMBOL(rtnl_trylock);
88
89int rtnl_is_locked(void)
90{
91 return mutex_is_locked(&rtnl_mutex);
92}
93EXPORT_SYMBOL(rtnl_is_locked);
94
95#ifdef CONFIG_PROVE_LOCKING
96int lockdep_rtnl_is_held(void)
97{
98 return lockdep_is_held(&rtnl_mutex);
99}
100EXPORT_SYMBOL(lockdep_rtnl_is_held);
101#endif /* #ifdef CONFIG_PROVE_LOCKING */
102
103static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
104
105static inline int rtm_msgindex(int msgtype)
106{
107 int msgindex = msgtype - RTM_BASE;
108
109 /*
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
113 */
114 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
115
116 return msgindex;
117}
118
119static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
120{
121 struct rtnl_link *tab;
122
123 if (protocol <= RTNL_FAMILY_MAX)
124 tab = rtnl_msg_handlers[protocol];
125 else
126 tab = NULL;
127
128 if (tab == NULL || tab[msgindex].doit == NULL)
129 tab = rtnl_msg_handlers[PF_UNSPEC];
130
131 return tab ? tab[msgindex].doit : NULL;
132}
133
134static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
135{
136 struct rtnl_link *tab;
137
138 if (protocol <= RTNL_FAMILY_MAX)
139 tab = rtnl_msg_handlers[protocol];
140 else
141 tab = NULL;
142
143 if (tab == NULL || tab[msgindex].dumpit == NULL)
144 tab = rtnl_msg_handlers[PF_UNSPEC];
145
146 return tab ? tab[msgindex].dumpit : NULL;
147}
148
149static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
150{
151 struct rtnl_link *tab;
152
153 if (protocol <= RTNL_FAMILY_MAX)
154 tab = rtnl_msg_handlers[protocol];
155 else
156 tab = NULL;
157
158 if (tab == NULL || tab[msgindex].calcit == NULL)
159 tab = rtnl_msg_handlers[PF_UNSPEC];
160
161 return tab ? tab[msgindex].calcit : NULL;
162}
163
164/**
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
171 *
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.
175 *
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
178 * family exists.
179 *
180 * Returns 0 on success or a negative error code.
181 */
182int __rtnl_register(int protocol, int msgtype,
183 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
184 rtnl_calcit_func calcit)
185{
186 struct rtnl_link *tab;
187 int msgindex;
188
189 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
190 msgindex = rtm_msgindex(msgtype);
191
192 tab = rtnl_msg_handlers[protocol];
193 if (tab == NULL) {
194 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
195 if (tab == NULL)
196 return -ENOBUFS;
197
198 rtnl_msg_handlers[protocol] = tab;
199 }
200
201 if (doit)
202 tab[msgindex].doit = doit;
203
204 if (dumpit)
205 tab[msgindex].dumpit = dumpit;
206
207 if (calcit)
208 tab[msgindex].calcit = calcit;
209
210 return 0;
211}
212EXPORT_SYMBOL_GPL(__rtnl_register);
213
214/**
215 * rtnl_register - Register a rtnetlink message type
216 *
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.
222 */
223void rtnl_register(int protocol, int msgtype,
224 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
225 rtnl_calcit_func calcit)
226{
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",
230 protocol, msgtype);
231}
232EXPORT_SYMBOL_GPL(rtnl_register);
233
234/**
235 * rtnl_unregister - Unregister a rtnetlink message type
236 * @protocol: Protocol family or PF_UNSPEC
237 * @msgtype: rtnetlink message type
238 *
239 * Returns 0 on success or a negative error code.
240 */
241int rtnl_unregister(int protocol, int msgtype)
242{
243 int msgindex;
244
245 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
246 msgindex = rtm_msgindex(msgtype);
247
248 if (rtnl_msg_handlers[protocol] == NULL)
249 return -ENOENT;
250
251 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
252 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
253
254 return 0;
255}
256EXPORT_SYMBOL_GPL(rtnl_unregister);
257
258/**
259 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
260 * @protocol : Protocol family or PF_UNSPEC
261 *
262 * Identical to calling rtnl_unregster() for all registered message types
263 * of a certain protocol family.
264 */
265void rtnl_unregister_all(int protocol)
266{
267 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
268
269 kfree(rtnl_msg_handlers[protocol]);
270 rtnl_msg_handlers[protocol] = NULL;
271}
272EXPORT_SYMBOL_GPL(rtnl_unregister_all);
273
274static LIST_HEAD(link_ops);
275
276/**
277 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
278 * @ops: struct rtnl_link_ops * to register
279 *
280 * The caller must hold the rtnl_mutex. This function should be used
281 * by drivers that create devices during module initialization. It
282 * must be called before registering the devices.
283 *
284 * Returns 0 on success or a negative error code.
285 */
286int __rtnl_link_register(struct rtnl_link_ops *ops)
287{
288 if (!ops->dellink)
289 ops->dellink = unregister_netdevice_queue;
290
291 list_add_tail(&ops->list, &link_ops);
292 return 0;
293}
294EXPORT_SYMBOL_GPL(__rtnl_link_register);
295
296/**
297 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
298 * @ops: struct rtnl_link_ops * to register
299 *
300 * Returns 0 on success or a negative error code.
301 */
302int rtnl_link_register(struct rtnl_link_ops *ops)
303{
304 int err;
305
306 rtnl_lock();
307 err = __rtnl_link_register(ops);
308 rtnl_unlock();
309 return err;
310}
311EXPORT_SYMBOL_GPL(rtnl_link_register);
312
313static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
314{
315 struct net_device *dev;
316 LIST_HEAD(list_kill);
317
318 for_each_netdev(net, dev) {
319 if (dev->rtnl_link_ops == ops)
320 ops->dellink(dev, &list_kill);
321 }
322 unregister_netdevice_many(&list_kill);
323}
324
325/**
326 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
327 * @ops: struct rtnl_link_ops * to unregister
328 *
329 * The caller must hold the rtnl_mutex.
330 */
331void __rtnl_link_unregister(struct rtnl_link_ops *ops)
332{
333 struct net *net;
334
335 for_each_net(net) {
336 __rtnl_kill_links(net, ops);
337 }
338 list_del(&ops->list);
339}
340EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
341
342/**
343 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
344 * @ops: struct rtnl_link_ops * to unregister
345 */
346void rtnl_link_unregister(struct rtnl_link_ops *ops)
347{
348 rtnl_lock();
349 __rtnl_link_unregister(ops);
350 rtnl_unlock();
351}
352EXPORT_SYMBOL_GPL(rtnl_link_unregister);
353
354static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
355{
356 const struct rtnl_link_ops *ops;
357
358 list_for_each_entry(ops, &link_ops, list) {
359 if (!strcmp(ops->kind, kind))
360 return ops;
361 }
362 return NULL;
363}
364
365static size_t rtnl_link_get_size(const struct net_device *dev)
366{
367 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
368 size_t size;
369
370 if (!ops)
371 return 0;
372
373 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
374 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
375
376 if (ops->get_size)
377 /* IFLA_INFO_DATA + nested data */
378 size += nla_total_size(sizeof(struct nlattr)) +
379 ops->get_size(dev);
380
381 if (ops->get_xstats_size)
382 /* IFLA_INFO_XSTATS */
383 size += nla_total_size(ops->get_xstats_size(dev));
384
385 return size;
386}
387
388static LIST_HEAD(rtnl_af_ops);
389
390static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
391{
392 const struct rtnl_af_ops *ops;
393
394 list_for_each_entry(ops, &rtnl_af_ops, list) {
395 if (ops->family == family)
396 return ops;
397 }
398
399 return NULL;
400}
401
402/**
403 * __rtnl_af_register - Register rtnl_af_ops with rtnetlink.
404 * @ops: struct rtnl_af_ops * to register
405 *
406 * The caller must hold the rtnl_mutex.
407 *
408 * Returns 0 on success or a negative error code.
409 */
410int __rtnl_af_register(struct rtnl_af_ops *ops)
411{
412 list_add_tail(&ops->list, &rtnl_af_ops);
413 return 0;
414}
415EXPORT_SYMBOL_GPL(__rtnl_af_register);
416
417/**
418 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
419 * @ops: struct rtnl_af_ops * to register
420 *
421 * Returns 0 on success or a negative error code.
422 */
423int rtnl_af_register(struct rtnl_af_ops *ops)
424{
425 int err;
426
427 rtnl_lock();
428 err = __rtnl_af_register(ops);
429 rtnl_unlock();
430 return err;
431}
432EXPORT_SYMBOL_GPL(rtnl_af_register);
433
434/**
435 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
436 * @ops: struct rtnl_af_ops * to unregister
437 *
438 * The caller must hold the rtnl_mutex.
439 */
440void __rtnl_af_unregister(struct rtnl_af_ops *ops)
441{
442 list_del(&ops->list);
443}
444EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
445
446/**
447 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
448 * @ops: struct rtnl_af_ops * to unregister
449 */
450void rtnl_af_unregister(struct rtnl_af_ops *ops)
451{
452 rtnl_lock();
453 __rtnl_af_unregister(ops);
454 rtnl_unlock();
455}
456EXPORT_SYMBOL_GPL(rtnl_af_unregister);
457
458static size_t rtnl_link_get_af_size(const struct net_device *dev)
459{
460 struct rtnl_af_ops *af_ops;
461 size_t size;
462
463 /* IFLA_AF_SPEC */
464 size = nla_total_size(sizeof(struct nlattr));
465
466 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
467 if (af_ops->get_link_af_size) {
468 /* AF_* + nested data */
469 size += nla_total_size(sizeof(struct nlattr)) +
470 af_ops->get_link_af_size(dev);
471 }
472 }
473
474 return size;
475}
476
477static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
478{
479 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
480 struct nlattr *linkinfo, *data;
481 int err = -EMSGSIZE;
482
483 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
484 if (linkinfo == NULL)
485 goto out;
486
487 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
488 goto err_cancel_link;
489 if (ops->fill_xstats) {
490 err = ops->fill_xstats(skb, dev);
491 if (err < 0)
492 goto err_cancel_link;
493 }
494 if (ops->fill_info) {
495 data = nla_nest_start(skb, IFLA_INFO_DATA);
496 if (data == NULL)
497 goto err_cancel_link;
498 err = ops->fill_info(skb, dev);
499 if (err < 0)
500 goto err_cancel_data;
501 nla_nest_end(skb, data);
502 }
503
504 nla_nest_end(skb, linkinfo);
505 return 0;
506
507err_cancel_data:
508 nla_nest_cancel(skb, data);
509err_cancel_link:
510 nla_nest_cancel(skb, linkinfo);
511out:
512 return err;
513}
514
515static const int rtm_min[RTM_NR_FAMILIES] =
516{
517 [RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
518 [RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)),
519 [RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)),
520 [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)),
521 [RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
522 [RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
523 [RTM_FAM(RTM_NEWTFILTER)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
524 [RTM_FAM(RTM_NEWACTION)] = NLMSG_LENGTH(sizeof(struct tcamsg)),
525 [RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
526 [RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
527};
528
529static const int rta_max[RTM_NR_FAMILIES] =
530{
531 [RTM_FAM(RTM_NEWLINK)] = IFLA_MAX,
532 [RTM_FAM(RTM_NEWADDR)] = IFA_MAX,
533 [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX,
534 [RTM_FAM(RTM_NEWRULE)] = FRA_MAX,
535 [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX,
536 [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX,
537 [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX,
538 [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX,
539};
540
541void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data)
542{
543 struct rtattr *rta;
544 int size = RTA_LENGTH(attrlen);
545
546 rta = (struct rtattr *)skb_put(skb, RTA_ALIGN(size));
547 rta->rta_type = attrtype;
548 rta->rta_len = size;
549 memcpy(RTA_DATA(rta), data, attrlen);
550 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
551}
552EXPORT_SYMBOL(__rta_fill);
553
554int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned group, int echo)
555{
556 struct sock *rtnl = net->rtnl;
557 int err = 0;
558
559 NETLINK_CB(skb).dst_group = group;
560 if (echo)
561 atomic_inc(&skb->users);
562 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
563 if (echo)
564 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
565 return err;
566}
567
568int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
569{
570 struct sock *rtnl = net->rtnl;
571
572 return nlmsg_unicast(rtnl, skb, pid);
573}
574EXPORT_SYMBOL(rtnl_unicast);
575
576void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
577 struct nlmsghdr *nlh, gfp_t flags)
578{
579 struct sock *rtnl = net->rtnl;
580 int report = 0;
581
582 if (nlh)
583 report = nlmsg_report(nlh);
584
585 nlmsg_notify(rtnl, skb, pid, group, report, flags);
586}
587EXPORT_SYMBOL(rtnl_notify);
588
589void rtnl_set_sk_err(struct net *net, u32 group, int error)
590{
591 struct sock *rtnl = net->rtnl;
592
593 netlink_set_err(rtnl, 0, group, error);
594}
595EXPORT_SYMBOL(rtnl_set_sk_err);
596
597int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
598{
599 struct nlattr *mx;
600 int i, valid = 0;
601
602 mx = nla_nest_start(skb, RTA_METRICS);
603 if (mx == NULL)
604 return -ENOBUFS;
605
606 for (i = 0; i < RTAX_MAX; i++) {
607 if (metrics[i]) {
608 valid++;
609 NLA_PUT_U32(skb, i+1, metrics[i]);
610 }
611 }
612
613 if (!valid) {
614 nla_nest_cancel(skb, mx);
615 return 0;
616 }
617
618 return nla_nest_end(skb, mx);
619
620nla_put_failure:
621 nla_nest_cancel(skb, mx);
622 return -EMSGSIZE;
623}
624EXPORT_SYMBOL(rtnetlink_put_metrics);
625
626int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
627 u32 ts, u32 tsage, long expires, u32 error)
628{
629 struct rta_cacheinfo ci = {
630 .rta_lastuse = jiffies_to_clock_t(jiffies - dst->lastuse),
631 .rta_used = dst->__use,
632 .rta_clntref = atomic_read(&(dst->__refcnt)),
633 .rta_error = error,
634 .rta_id = id,
635 .rta_ts = ts,
636 .rta_tsage = tsage,
637 };
638
639 if (expires)
640 ci.rta_expires = jiffies_to_clock_t(expires);
641
642 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
643}
644EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
645
646static void set_operstate(struct net_device *dev, unsigned char transition)
647{
648 unsigned char operstate = dev->operstate;
649
650 switch (transition) {
651 case IF_OPER_UP:
652 if ((operstate == IF_OPER_DORMANT ||
653 operstate == IF_OPER_UNKNOWN) &&
654 !netif_dormant(dev))
655 operstate = IF_OPER_UP;
656 break;
657
658 case IF_OPER_DORMANT:
659 if (operstate == IF_OPER_UP ||
660 operstate == IF_OPER_UNKNOWN)
661 operstate = IF_OPER_DORMANT;
662 break;
663 }
664
665 if (dev->operstate != operstate) {
666 write_lock_bh(&dev_base_lock);
667 dev->operstate = operstate;
668 write_unlock_bh(&dev_base_lock);
669 netdev_state_change(dev);
670 }
671}
672
673static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
674 const struct ifinfomsg *ifm)
675{
676 unsigned int flags = ifm->ifi_flags;
677
678 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
679 if (ifm->ifi_change)
680 flags = (flags & ifm->ifi_change) |
681 (dev->flags & ~ifm->ifi_change);
682
683 return flags;
684}
685
686static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
687 const struct rtnl_link_stats64 *b)
688{
689 a->rx_packets = b->rx_packets;
690 a->tx_packets = b->tx_packets;
691 a->rx_bytes = b->rx_bytes;
692 a->tx_bytes = b->tx_bytes;
693 a->rx_errors = b->rx_errors;
694 a->tx_errors = b->tx_errors;
695 a->rx_dropped = b->rx_dropped;
696 a->tx_dropped = b->tx_dropped;
697
698 a->multicast = b->multicast;
699 a->collisions = b->collisions;
700
701 a->rx_length_errors = b->rx_length_errors;
702 a->rx_over_errors = b->rx_over_errors;
703 a->rx_crc_errors = b->rx_crc_errors;
704 a->rx_frame_errors = b->rx_frame_errors;
705 a->rx_fifo_errors = b->rx_fifo_errors;
706 a->rx_missed_errors = b->rx_missed_errors;
707
708 a->tx_aborted_errors = b->tx_aborted_errors;
709 a->tx_carrier_errors = b->tx_carrier_errors;
710 a->tx_fifo_errors = b->tx_fifo_errors;
711 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
712 a->tx_window_errors = b->tx_window_errors;
713
714 a->rx_compressed = b->rx_compressed;
715 a->tx_compressed = b->tx_compressed;
716}
717
718static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b)
719{
720 memcpy(v, b, sizeof(*b));
721}
722
723/* All VF info */
724static inline int rtnl_vfinfo_size(const struct net_device *dev)
725{
726 if (dev->dev.parent && dev_is_pci(dev->dev.parent)) {
727
728 int num_vfs = dev_num_vf(dev->dev.parent);
729 size_t size = nla_total_size(sizeof(struct nlattr));
730 size += nla_total_size(num_vfs * sizeof(struct nlattr));
731 size += num_vfs *
732 (nla_total_size(sizeof(struct ifla_vf_mac)) +
733 nla_total_size(sizeof(struct ifla_vf_vlan)) +
734 nla_total_size(sizeof(struct ifla_vf_tx_rate)));
735 return size;
736 } else
737 return 0;
738}
739
740static size_t rtnl_port_size(const struct net_device *dev)
741{
742 size_t port_size = nla_total_size(4) /* PORT_VF */
743 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
744 + nla_total_size(sizeof(struct ifla_port_vsi))
745 /* PORT_VSI_TYPE */
746 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
747 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
748 + nla_total_size(1) /* PROT_VDP_REQUEST */
749 + nla_total_size(2); /* PORT_VDP_RESPONSE */
750 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
751 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
752 + port_size;
753 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
754 + port_size;
755
756 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
757 return 0;
758 if (dev_num_vf(dev->dev.parent))
759 return port_self_size + vf_ports_size +
760 vf_port_size * dev_num_vf(dev->dev.parent);
761 else
762 return port_self_size;
763}
764
765static noinline size_t if_nlmsg_size(const struct net_device *dev)
766{
767 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
768 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
769 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
770 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
771 + nla_total_size(sizeof(struct rtnl_link_ifmap))
772 + nla_total_size(sizeof(struct rtnl_link_stats))
773 + nla_total_size(sizeof(struct rtnl_link_stats64))
774 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
775 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
776 + nla_total_size(4) /* IFLA_TXQLEN */
777 + nla_total_size(4) /* IFLA_WEIGHT */
778 + nla_total_size(4) /* IFLA_MTU */
779 + nla_total_size(4) /* IFLA_LINK */
780 + nla_total_size(4) /* IFLA_MASTER */
781 + nla_total_size(1) /* IFLA_OPERSTATE */
782 + nla_total_size(1) /* IFLA_LINKMODE */
783 + nla_total_size(4) /* IFLA_NUM_VF */
784 + rtnl_vfinfo_size(dev) /* IFLA_VFINFO_LIST */
785 + rtnl_port_size(dev) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
786 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
787 + rtnl_link_get_af_size(dev); /* IFLA_AF_SPEC */
788}
789
790static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
791{
792 struct nlattr *vf_ports;
793 struct nlattr *vf_port;
794 int vf;
795 int err;
796
797 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
798 if (!vf_ports)
799 return -EMSGSIZE;
800
801 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
802 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
803 if (!vf_port)
804 goto nla_put_failure;
805 NLA_PUT_U32(skb, IFLA_PORT_VF, vf);
806 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
807 if (err == -EMSGSIZE)
808 goto nla_put_failure;
809 if (err) {
810 nla_nest_cancel(skb, vf_port);
811 continue;
812 }
813 nla_nest_end(skb, vf_port);
814 }
815
816 nla_nest_end(skb, vf_ports);
817
818 return 0;
819
820nla_put_failure:
821 nla_nest_cancel(skb, vf_ports);
822 return -EMSGSIZE;
823}
824
825static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
826{
827 struct nlattr *port_self;
828 int err;
829
830 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
831 if (!port_self)
832 return -EMSGSIZE;
833
834 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
835 if (err) {
836 nla_nest_cancel(skb, port_self);
837 return (err == -EMSGSIZE) ? err : 0;
838 }
839
840 nla_nest_end(skb, port_self);
841
842 return 0;
843}
844
845static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev)
846{
847 int err;
848
849 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent)
850 return 0;
851
852 err = rtnl_port_self_fill(skb, dev);
853 if (err)
854 return err;
855
856 if (dev_num_vf(dev->dev.parent)) {
857 err = rtnl_vf_ports_fill(skb, dev);
858 if (err)
859 return err;
860 }
861
862 return 0;
863}
864
865static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
866 int type, u32 pid, u32 seq, u32 change,
867 unsigned int flags)
868{
869 struct ifinfomsg *ifm;
870 struct nlmsghdr *nlh;
871 struct rtnl_link_stats64 temp;
872 const struct rtnl_link_stats64 *stats;
873 struct nlattr *attr, *af_spec;
874 struct rtnl_af_ops *af_ops;
875
876 ASSERT_RTNL();
877 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
878 if (nlh == NULL)
879 return -EMSGSIZE;
880
881 ifm = nlmsg_data(nlh);
882 ifm->ifi_family = AF_UNSPEC;
883 ifm->__ifi_pad = 0;
884 ifm->ifi_type = dev->type;
885 ifm->ifi_index = dev->ifindex;
886 ifm->ifi_flags = dev_get_flags(dev);
887 ifm->ifi_change = change;
888
889 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
890 NLA_PUT_U32(skb, IFLA_TXQLEN, dev->tx_queue_len);
891 NLA_PUT_U8(skb, IFLA_OPERSTATE,
892 netif_running(dev) ? dev->operstate : IF_OPER_DOWN);
893 NLA_PUT_U8(skb, IFLA_LINKMODE, dev->link_mode);
894 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
895 NLA_PUT_U32(skb, IFLA_GROUP, dev->group);
896
897 if (dev->ifindex != dev->iflink)
898 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
899
900 if (dev->master)
901 NLA_PUT_U32(skb, IFLA_MASTER, dev->master->ifindex);
902
903 if (dev->qdisc)
904 NLA_PUT_STRING(skb, IFLA_QDISC, dev->qdisc->ops->id);
905
906 if (dev->ifalias)
907 NLA_PUT_STRING(skb, IFLA_IFALIAS, dev->ifalias);
908
909 if (1) {
910 struct rtnl_link_ifmap map = {
911 .mem_start = dev->mem_start,
912 .mem_end = dev->mem_end,
913 .base_addr = dev->base_addr,
914 .irq = dev->irq,
915 .dma = dev->dma,
916 .port = dev->if_port,
917 };
918 NLA_PUT(skb, IFLA_MAP, sizeof(map), &map);
919 }
920
921 if (dev->addr_len) {
922 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
923 NLA_PUT(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast);
924 }
925
926 attr = nla_reserve(skb, IFLA_STATS,
927 sizeof(struct rtnl_link_stats));
928 if (attr == NULL)
929 goto nla_put_failure;
930
931 stats = dev_get_stats(dev, &temp);
932 copy_rtnl_link_stats(nla_data(attr), stats);
933
934 attr = nla_reserve(skb, IFLA_STATS64,
935 sizeof(struct rtnl_link_stats64));
936 if (attr == NULL)
937 goto nla_put_failure;
938 copy_rtnl_link_stats64(nla_data(attr), stats);
939
940 if (dev->dev.parent)
941 NLA_PUT_U32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent));
942
943 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent) {
944 int i;
945
946 struct nlattr *vfinfo, *vf;
947 int num_vfs = dev_num_vf(dev->dev.parent);
948
949 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
950 if (!vfinfo)
951 goto nla_put_failure;
952 for (i = 0; i < num_vfs; i++) {
953 struct ifla_vf_info ivi;
954 struct ifla_vf_mac vf_mac;
955 struct ifla_vf_vlan vf_vlan;
956 struct ifla_vf_tx_rate vf_tx_rate;
957 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))
958 break;
959 vf_mac.vf = vf_vlan.vf = vf_tx_rate.vf = ivi.vf;
960 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
961 vf_vlan.vlan = ivi.vlan;
962 vf_vlan.qos = ivi.qos;
963 vf_tx_rate.rate = ivi.tx_rate;
964 vf = nla_nest_start(skb, IFLA_VF_INFO);
965 if (!vf) {
966 nla_nest_cancel(skb, vfinfo);
967 goto nla_put_failure;
968 }
969 NLA_PUT(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac);
970 NLA_PUT(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan);
971 NLA_PUT(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate), &vf_tx_rate);
972 nla_nest_end(skb, vf);
973 }
974 nla_nest_end(skb, vfinfo);
975 }
976
977 if (rtnl_port_fill(skb, dev))
978 goto nla_put_failure;
979
980 if (dev->rtnl_link_ops) {
981 if (rtnl_link_fill(skb, dev) < 0)
982 goto nla_put_failure;
983 }
984
985 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
986 goto nla_put_failure;
987
988 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
989 if (af_ops->fill_link_af) {
990 struct nlattr *af;
991 int err;
992
993 if (!(af = nla_nest_start(skb, af_ops->family)))
994 goto nla_put_failure;
995
996 err = af_ops->fill_link_af(skb, dev);
997
998 /*
999 * Caller may return ENODATA to indicate that there
1000 * was no data to be dumped. This is not an error, it
1001 * means we should trim the attribute header and
1002 * continue.
1003 */
1004 if (err == -ENODATA)
1005 nla_nest_cancel(skb, af);
1006 else if (err < 0)
1007 goto nla_put_failure;
1008
1009 nla_nest_end(skb, af);
1010 }
1011 }
1012
1013 nla_nest_end(skb, af_spec);
1014
1015 return nlmsg_end(skb, nlh);
1016
1017nla_put_failure:
1018 nlmsg_cancel(skb, nlh);
1019 return -EMSGSIZE;
1020}
1021
1022static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1023{
1024 struct net *net = sock_net(skb->sk);
1025 int h, s_h;
1026 int idx = 0, s_idx;
1027 struct net_device *dev;
1028 struct hlist_head *head;
1029 struct hlist_node *node;
1030
1031 s_h = cb->args[0];
1032 s_idx = cb->args[1];
1033
1034 rcu_read_lock();
1035 cb->seq = net->dev_base_seq;
1036
1037 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1038 idx = 0;
1039 head = &net->dev_index_head[h];
1040 hlist_for_each_entry_rcu(dev, node, head, index_hlist) {
1041 if (idx < s_idx)
1042 goto cont;
1043 if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1044 NETLINK_CB(cb->skb).pid,
1045 cb->nlh->nlmsg_seq, 0,
1046 NLM_F_MULTI) <= 0)
1047 goto out;
1048
1049 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1050cont:
1051 idx++;
1052 }
1053 }
1054out:
1055 rcu_read_unlock();
1056 cb->args[1] = idx;
1057 cb->args[0] = h;
1058
1059 return skb->len;
1060}
1061
1062const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1063 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1064 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1065 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1066 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1067 [IFLA_MTU] = { .type = NLA_U32 },
1068 [IFLA_LINK] = { .type = NLA_U32 },
1069 [IFLA_MASTER] = { .type = NLA_U32 },
1070 [IFLA_TXQLEN] = { .type = NLA_U32 },
1071 [IFLA_WEIGHT] = { .type = NLA_U32 },
1072 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1073 [IFLA_LINKMODE] = { .type = NLA_U8 },
1074 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1075 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1076 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1077 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
1078 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1079 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1080 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1081 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1082};
1083EXPORT_SYMBOL(ifla_policy);
1084
1085static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1086 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1087 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1088};
1089
1090static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
1091 [IFLA_VF_INFO] = { .type = NLA_NESTED },
1092};
1093
1094static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1095 [IFLA_VF_MAC] = { .type = NLA_BINARY,
1096 .len = sizeof(struct ifla_vf_mac) },
1097 [IFLA_VF_VLAN] = { .type = NLA_BINARY,
1098 .len = sizeof(struct ifla_vf_vlan) },
1099 [IFLA_VF_TX_RATE] = { .type = NLA_BINARY,
1100 .len = sizeof(struct ifla_vf_tx_rate) },
1101};
1102
1103static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1104 [IFLA_PORT_VF] = { .type = NLA_U32 },
1105 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1106 .len = PORT_PROFILE_MAX },
1107 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1108 .len = sizeof(struct ifla_port_vsi)},
1109 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1110 .len = PORT_UUID_MAX },
1111 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1112 .len = PORT_UUID_MAX },
1113 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1114 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1115};
1116
1117struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1118{
1119 struct net *net;
1120 /* Examine the link attributes and figure out which
1121 * network namespace we are talking about.
1122 */
1123 if (tb[IFLA_NET_NS_PID])
1124 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
1125 else if (tb[IFLA_NET_NS_FD])
1126 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
1127 else
1128 net = get_net(src_net);
1129 return net;
1130}
1131EXPORT_SYMBOL(rtnl_link_get_net);
1132
1133static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1134{
1135 if (dev) {
1136 if (tb[IFLA_ADDRESS] &&
1137 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1138 return -EINVAL;
1139
1140 if (tb[IFLA_BROADCAST] &&
1141 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1142 return -EINVAL;
1143 }
1144
1145 if (tb[IFLA_AF_SPEC]) {
1146 struct nlattr *af;
1147 int rem, err;
1148
1149 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1150 const struct rtnl_af_ops *af_ops;
1151
1152 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1153 return -EAFNOSUPPORT;
1154
1155 if (!af_ops->set_link_af)
1156 return -EOPNOTSUPP;
1157
1158 if (af_ops->validate_link_af) {
1159 err = af_ops->validate_link_af(dev, af);
1160 if (err < 0)
1161 return err;
1162 }
1163 }
1164 }
1165
1166 return 0;
1167}
1168
1169static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
1170{
1171 int rem, err = -EINVAL;
1172 struct nlattr *vf;
1173 const struct net_device_ops *ops = dev->netdev_ops;
1174
1175 nla_for_each_nested(vf, attr, rem) {
1176 switch (nla_type(vf)) {
1177 case IFLA_VF_MAC: {
1178 struct ifla_vf_mac *ivm;
1179 ivm = nla_data(vf);
1180 err = -EOPNOTSUPP;
1181 if (ops->ndo_set_vf_mac)
1182 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1183 ivm->mac);
1184 break;
1185 }
1186 case IFLA_VF_VLAN: {
1187 struct ifla_vf_vlan *ivv;
1188 ivv = nla_data(vf);
1189 err = -EOPNOTSUPP;
1190 if (ops->ndo_set_vf_vlan)
1191 err = ops->ndo_set_vf_vlan(dev, ivv->vf,
1192 ivv->vlan,
1193 ivv->qos);
1194 break;
1195 }
1196 case IFLA_VF_TX_RATE: {
1197 struct ifla_vf_tx_rate *ivt;
1198 ivt = nla_data(vf);
1199 err = -EOPNOTSUPP;
1200 if (ops->ndo_set_vf_tx_rate)
1201 err = ops->ndo_set_vf_tx_rate(dev, ivt->vf,
1202 ivt->rate);
1203 break;
1204 }
1205 default:
1206 err = -EINVAL;
1207 break;
1208 }
1209 if (err)
1210 break;
1211 }
1212 return err;
1213}
1214
1215static int do_set_master(struct net_device *dev, int ifindex)
1216{
1217 struct net_device *master_dev;
1218 const struct net_device_ops *ops;
1219 int err;
1220
1221 if (dev->master) {
1222 if (dev->master->ifindex == ifindex)
1223 return 0;
1224 ops = dev->master->netdev_ops;
1225 if (ops->ndo_del_slave) {
1226 err = ops->ndo_del_slave(dev->master, dev);
1227 if (err)
1228 return err;
1229 } else {
1230 return -EOPNOTSUPP;
1231 }
1232 }
1233
1234 if (ifindex) {
1235 master_dev = __dev_get_by_index(dev_net(dev), ifindex);
1236 if (!master_dev)
1237 return -EINVAL;
1238 ops = master_dev->netdev_ops;
1239 if (ops->ndo_add_slave) {
1240 err = ops->ndo_add_slave(master_dev, dev);
1241 if (err)
1242 return err;
1243 } else {
1244 return -EOPNOTSUPP;
1245 }
1246 }
1247 return 0;
1248}
1249
1250static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
1251 struct nlattr **tb, char *ifname, int modified)
1252{
1253 const struct net_device_ops *ops = dev->netdev_ops;
1254 int send_addr_notify = 0;
1255 int err;
1256
1257 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
1258 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
1259 if (IS_ERR(net)) {
1260 err = PTR_ERR(net);
1261 goto errout;
1262 }
1263 err = dev_change_net_namespace(dev, net, ifname);
1264 put_net(net);
1265 if (err)
1266 goto errout;
1267 modified = 1;
1268 }
1269
1270 if (tb[IFLA_MAP]) {
1271 struct rtnl_link_ifmap *u_map;
1272 struct ifmap k_map;
1273
1274 if (!ops->ndo_set_config) {
1275 err = -EOPNOTSUPP;
1276 goto errout;
1277 }
1278
1279 if (!netif_device_present(dev)) {
1280 err = -ENODEV;
1281 goto errout;
1282 }
1283
1284 u_map = nla_data(tb[IFLA_MAP]);
1285 k_map.mem_start = (unsigned long) u_map->mem_start;
1286 k_map.mem_end = (unsigned long) u_map->mem_end;
1287 k_map.base_addr = (unsigned short) u_map->base_addr;
1288 k_map.irq = (unsigned char) u_map->irq;
1289 k_map.dma = (unsigned char) u_map->dma;
1290 k_map.port = (unsigned char) u_map->port;
1291
1292 err = ops->ndo_set_config(dev, &k_map);
1293 if (err < 0)
1294 goto errout;
1295
1296 modified = 1;
1297 }
1298
1299 if (tb[IFLA_ADDRESS]) {
1300 struct sockaddr *sa;
1301 int len;
1302
1303 if (!ops->ndo_set_mac_address) {
1304 err = -EOPNOTSUPP;
1305 goto errout;
1306 }
1307
1308 if (!netif_device_present(dev)) {
1309 err = -ENODEV;
1310 goto errout;
1311 }
1312
1313 len = sizeof(sa_family_t) + dev->addr_len;
1314 sa = kmalloc(len, GFP_KERNEL);
1315 if (!sa) {
1316 err = -ENOMEM;
1317 goto errout;
1318 }
1319 sa->sa_family = dev->type;
1320 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
1321 dev->addr_len);
1322 err = ops->ndo_set_mac_address(dev, sa);
1323 kfree(sa);
1324 if (err)
1325 goto errout;
1326 send_addr_notify = 1;
1327 modified = 1;
1328 }
1329
1330 if (tb[IFLA_MTU]) {
1331 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1332 if (err < 0)
1333 goto errout;
1334 modified = 1;
1335 }
1336
1337 if (tb[IFLA_GROUP]) {
1338 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1339 modified = 1;
1340 }
1341
1342 /*
1343 * Interface selected by interface index but interface
1344 * name provided implies that a name change has been
1345 * requested.
1346 */
1347 if (ifm->ifi_index > 0 && ifname[0]) {
1348 err = dev_change_name(dev, ifname);
1349 if (err < 0)
1350 goto errout;
1351 modified = 1;
1352 }
1353
1354 if (tb[IFLA_IFALIAS]) {
1355 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
1356 nla_len(tb[IFLA_IFALIAS]));
1357 if (err < 0)
1358 goto errout;
1359 modified = 1;
1360 }
1361
1362 if (tb[IFLA_BROADCAST]) {
1363 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
1364 send_addr_notify = 1;
1365 }
1366
1367 if (ifm->ifi_flags || ifm->ifi_change) {
1368 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1369 if (err < 0)
1370 goto errout;
1371 }
1372
1373 if (tb[IFLA_MASTER]) {
1374 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
1375 if (err)
1376 goto errout;
1377 modified = 1;
1378 }
1379
1380 if (tb[IFLA_TXQLEN])
1381 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1382
1383 if (tb[IFLA_OPERSTATE])
1384 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1385
1386 if (tb[IFLA_LINKMODE]) {
1387 write_lock_bh(&dev_base_lock);
1388 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1389 write_unlock_bh(&dev_base_lock);
1390 }
1391
1392 if (tb[IFLA_VFINFO_LIST]) {
1393 struct nlattr *attr;
1394 int rem;
1395 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
1396 if (nla_type(attr) != IFLA_VF_INFO) {
1397 err = -EINVAL;
1398 goto errout;
1399 }
1400 err = do_setvfinfo(dev, attr);
1401 if (err < 0)
1402 goto errout;
1403 modified = 1;
1404 }
1405 }
1406 err = 0;
1407
1408 if (tb[IFLA_VF_PORTS]) {
1409 struct nlattr *port[IFLA_PORT_MAX+1];
1410 struct nlattr *attr;
1411 int vf;
1412 int rem;
1413
1414 err = -EOPNOTSUPP;
1415 if (!ops->ndo_set_vf_port)
1416 goto errout;
1417
1418 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
1419 if (nla_type(attr) != IFLA_VF_PORT)
1420 continue;
1421 err = nla_parse_nested(port, IFLA_PORT_MAX,
1422 attr, ifla_port_policy);
1423 if (err < 0)
1424 goto errout;
1425 if (!port[IFLA_PORT_VF]) {
1426 err = -EOPNOTSUPP;
1427 goto errout;
1428 }
1429 vf = nla_get_u32(port[IFLA_PORT_VF]);
1430 err = ops->ndo_set_vf_port(dev, vf, port);
1431 if (err < 0)
1432 goto errout;
1433 modified = 1;
1434 }
1435 }
1436 err = 0;
1437
1438 if (tb[IFLA_PORT_SELF]) {
1439 struct nlattr *port[IFLA_PORT_MAX+1];
1440
1441 err = nla_parse_nested(port, IFLA_PORT_MAX,
1442 tb[IFLA_PORT_SELF], ifla_port_policy);
1443 if (err < 0)
1444 goto errout;
1445
1446 err = -EOPNOTSUPP;
1447 if (ops->ndo_set_vf_port)
1448 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
1449 if (err < 0)
1450 goto errout;
1451 modified = 1;
1452 }
1453
1454 if (tb[IFLA_AF_SPEC]) {
1455 struct nlattr *af;
1456 int rem;
1457
1458 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1459 const struct rtnl_af_ops *af_ops;
1460
1461 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1462 BUG();
1463
1464 err = af_ops->set_link_af(dev, af);
1465 if (err < 0)
1466 goto errout;
1467
1468 modified = 1;
1469 }
1470 }
1471 err = 0;
1472
1473errout:
1474 if (err < 0 && modified && net_ratelimit())
1475 printk(KERN_WARNING "A link change request failed with "
1476 "some changes committed already. Interface %s may "
1477 "have been left with an inconsistent configuration, "
1478 "please check.\n", dev->name);
1479
1480 if (send_addr_notify)
1481 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1482 return err;
1483}
1484
1485static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1486{
1487 struct net *net = sock_net(skb->sk);
1488 struct ifinfomsg *ifm;
1489 struct net_device *dev;
1490 int err;
1491 struct nlattr *tb[IFLA_MAX+1];
1492 char ifname[IFNAMSIZ];
1493
1494 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1495 if (err < 0)
1496 goto errout;
1497
1498 if (tb[IFLA_IFNAME])
1499 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1500 else
1501 ifname[0] = '\0';
1502
1503 err = -EINVAL;
1504 ifm = nlmsg_data(nlh);
1505 if (ifm->ifi_index > 0)
1506 dev = __dev_get_by_index(net, ifm->ifi_index);
1507 else if (tb[IFLA_IFNAME])
1508 dev = __dev_get_by_name(net, ifname);
1509 else
1510 goto errout;
1511
1512 if (dev == NULL) {
1513 err = -ENODEV;
1514 goto errout;
1515 }
1516
1517 err = validate_linkmsg(dev, tb);
1518 if (err < 0)
1519 goto errout;
1520
1521 err = do_setlink(dev, ifm, tb, ifname, 0);
1522errout:
1523 return err;
1524}
1525
1526static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1527{
1528 struct net *net = sock_net(skb->sk);
1529 const struct rtnl_link_ops *ops;
1530 struct net_device *dev;
1531 struct ifinfomsg *ifm;
1532 char ifname[IFNAMSIZ];
1533 struct nlattr *tb[IFLA_MAX+1];
1534 int err;
1535 LIST_HEAD(list_kill);
1536
1537 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1538 if (err < 0)
1539 return err;
1540
1541 if (tb[IFLA_IFNAME])
1542 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1543
1544 ifm = nlmsg_data(nlh);
1545 if (ifm->ifi_index > 0)
1546 dev = __dev_get_by_index(net, ifm->ifi_index);
1547 else if (tb[IFLA_IFNAME])
1548 dev = __dev_get_by_name(net, ifname);
1549 else
1550 return -EINVAL;
1551
1552 if (!dev)
1553 return -ENODEV;
1554
1555 ops = dev->rtnl_link_ops;
1556 if (!ops)
1557 return -EOPNOTSUPP;
1558
1559 ops->dellink(dev, &list_kill);
1560 unregister_netdevice_many(&list_kill);
1561 list_del(&list_kill);
1562 return 0;
1563}
1564
1565int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
1566{
1567 unsigned int old_flags;
1568 int err;
1569
1570 old_flags = dev->flags;
1571 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
1572 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
1573 if (err < 0)
1574 return err;
1575 }
1576
1577 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
1578 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U);
1579
1580 __dev_notify_flags(dev, old_flags);
1581 return 0;
1582}
1583EXPORT_SYMBOL(rtnl_configure_link);
1584
1585struct net_device *rtnl_create_link(struct net *src_net, struct net *net,
1586 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[])
1587{
1588 int err;
1589 struct net_device *dev;
1590 unsigned int num_queues = 1;
1591 unsigned int real_num_queues = 1;
1592
1593 if (ops->get_tx_queues) {
1594 err = ops->get_tx_queues(src_net, tb, &num_queues,
1595 &real_num_queues);
1596 if (err)
1597 goto err;
1598 }
1599 err = -ENOMEM;
1600 dev = alloc_netdev_mq(ops->priv_size, ifname, ops->setup, num_queues);
1601 if (!dev)
1602 goto err;
1603
1604 dev_net_set(dev, net);
1605 dev->rtnl_link_ops = ops;
1606 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
1607 dev->real_num_tx_queues = real_num_queues;
1608
1609 if (tb[IFLA_MTU])
1610 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
1611 if (tb[IFLA_ADDRESS])
1612 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
1613 nla_len(tb[IFLA_ADDRESS]));
1614 if (tb[IFLA_BROADCAST])
1615 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
1616 nla_len(tb[IFLA_BROADCAST]));
1617 if (tb[IFLA_TXQLEN])
1618 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
1619 if (tb[IFLA_OPERSTATE])
1620 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
1621 if (tb[IFLA_LINKMODE])
1622 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
1623 if (tb[IFLA_GROUP])
1624 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
1625
1626 return dev;
1627
1628err:
1629 return ERR_PTR(err);
1630}
1631EXPORT_SYMBOL(rtnl_create_link);
1632
1633static int rtnl_group_changelink(struct net *net, int group,
1634 struct ifinfomsg *ifm,
1635 struct nlattr **tb)
1636{
1637 struct net_device *dev;
1638 int err;
1639
1640 for_each_netdev(net, dev) {
1641 if (dev->group == group) {
1642 err = do_setlink(dev, ifm, tb, NULL, 0);
1643 if (err < 0)
1644 return err;
1645 }
1646 }
1647
1648 return 0;
1649}
1650
1651static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1652{
1653 struct net *net = sock_net(skb->sk);
1654 const struct rtnl_link_ops *ops;
1655 struct net_device *dev;
1656 struct ifinfomsg *ifm;
1657 char kind[MODULE_NAME_LEN];
1658 char ifname[IFNAMSIZ];
1659 struct nlattr *tb[IFLA_MAX+1];
1660 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
1661 int err;
1662
1663#ifdef CONFIG_MODULES
1664replay:
1665#endif
1666 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1667 if (err < 0)
1668 return err;
1669
1670 if (tb[IFLA_IFNAME])
1671 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1672 else
1673 ifname[0] = '\0';
1674
1675 ifm = nlmsg_data(nlh);
1676 if (ifm->ifi_index > 0)
1677 dev = __dev_get_by_index(net, ifm->ifi_index);
1678 else {
1679 if (ifname[0])
1680 dev = __dev_get_by_name(net, ifname);
1681 else
1682 dev = NULL;
1683 }
1684
1685 err = validate_linkmsg(dev, tb);
1686 if (err < 0)
1687 return err;
1688
1689 if (tb[IFLA_LINKINFO]) {
1690 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
1691 tb[IFLA_LINKINFO], ifla_info_policy);
1692 if (err < 0)
1693 return err;
1694 } else
1695 memset(linkinfo, 0, sizeof(linkinfo));
1696
1697 if (linkinfo[IFLA_INFO_KIND]) {
1698 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
1699 ops = rtnl_link_ops_get(kind);
1700 } else {
1701 kind[0] = '\0';
1702 ops = NULL;
1703 }
1704
1705 if (1) {
1706 struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL;
1707 struct net *dest_net;
1708
1709 if (ops) {
1710 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
1711 err = nla_parse_nested(attr, ops->maxtype,
1712 linkinfo[IFLA_INFO_DATA],
1713 ops->policy);
1714 if (err < 0)
1715 return err;
1716 data = attr;
1717 }
1718 if (ops->validate) {
1719 err = ops->validate(tb, data);
1720 if (err < 0)
1721 return err;
1722 }
1723 }
1724
1725 if (dev) {
1726 int modified = 0;
1727
1728 if (nlh->nlmsg_flags & NLM_F_EXCL)
1729 return -EEXIST;
1730 if (nlh->nlmsg_flags & NLM_F_REPLACE)
1731 return -EOPNOTSUPP;
1732
1733 if (linkinfo[IFLA_INFO_DATA]) {
1734 if (!ops || ops != dev->rtnl_link_ops ||
1735 !ops->changelink)
1736 return -EOPNOTSUPP;
1737
1738 err = ops->changelink(dev, tb, data);
1739 if (err < 0)
1740 return err;
1741 modified = 1;
1742 }
1743
1744 return do_setlink(dev, ifm, tb, ifname, modified);
1745 }
1746
1747 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
1748 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
1749 return rtnl_group_changelink(net,
1750 nla_get_u32(tb[IFLA_GROUP]),
1751 ifm, tb);
1752 return -ENODEV;
1753 }
1754
1755 if (ifm->ifi_index)
1756 return -EOPNOTSUPP;
1757 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
1758 return -EOPNOTSUPP;
1759
1760 if (!ops) {
1761#ifdef CONFIG_MODULES
1762 if (kind[0]) {
1763 __rtnl_unlock();
1764 request_module("rtnl-link-%s", kind);
1765 rtnl_lock();
1766 ops = rtnl_link_ops_get(kind);
1767 if (ops)
1768 goto replay;
1769 }
1770#endif
1771 return -EOPNOTSUPP;
1772 }
1773
1774 if (!ifname[0])
1775 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
1776
1777 dest_net = rtnl_link_get_net(net, tb);
1778 if (IS_ERR(dest_net))
1779 return PTR_ERR(dest_net);
1780
1781 dev = rtnl_create_link(net, dest_net, ifname, ops, tb);
1782
1783 if (IS_ERR(dev))
1784 err = PTR_ERR(dev);
1785 else if (ops->newlink)
1786 err = ops->newlink(net, dev, tb, data);
1787 else
1788 err = register_netdevice(dev);
1789
1790 if (err < 0 && !IS_ERR(dev))
1791 free_netdev(dev);
1792 if (err < 0)
1793 goto out;
1794
1795 err = rtnl_configure_link(dev, ifm);
1796 if (err < 0)
1797 unregister_netdevice(dev);
1798out:
1799 put_net(dest_net);
1800 return err;
1801 }
1802}
1803
1804static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
1805{
1806 struct net *net = sock_net(skb->sk);
1807 struct ifinfomsg *ifm;
1808 char ifname[IFNAMSIZ];
1809 struct nlattr *tb[IFLA_MAX+1];
1810 struct net_device *dev = NULL;
1811 struct sk_buff *nskb;
1812 int err;
1813
1814 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
1815 if (err < 0)
1816 return err;
1817
1818 if (tb[IFLA_IFNAME])
1819 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
1820
1821 ifm = nlmsg_data(nlh);
1822 if (ifm->ifi_index > 0)
1823 dev = __dev_get_by_index(net, ifm->ifi_index);
1824 else if (tb[IFLA_IFNAME])
1825 dev = __dev_get_by_name(net, ifname);
1826 else
1827 return -EINVAL;
1828
1829 if (dev == NULL)
1830 return -ENODEV;
1831
1832 nskb = nlmsg_new(if_nlmsg_size(dev), GFP_KERNEL);
1833 if (nskb == NULL)
1834 return -ENOBUFS;
1835
1836 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).pid,
1837 nlh->nlmsg_seq, 0, 0);
1838 if (err < 0) {
1839 /* -EMSGSIZE implies BUG in if_nlmsg_size */
1840 WARN_ON(err == -EMSGSIZE);
1841 kfree_skb(nskb);
1842 } else
1843 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).pid);
1844
1845 return err;
1846}
1847
1848static u16 rtnl_calcit(struct sk_buff *skb)
1849{
1850 return min_ifinfo_dump_size;
1851}
1852
1853static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1854{
1855 int idx;
1856 int s_idx = cb->family;
1857
1858 if (s_idx == 0)
1859 s_idx = 1;
1860 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1861 int type = cb->nlh->nlmsg_type-RTM_BASE;
1862 if (idx < s_idx || idx == PF_PACKET)
1863 continue;
1864 if (rtnl_msg_handlers[idx] == NULL ||
1865 rtnl_msg_handlers[idx][type].dumpit == NULL)
1866 continue;
1867 if (idx > s_idx)
1868 memset(&cb->args[0], 0, sizeof(cb->args));
1869 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1870 break;
1871 }
1872 cb->family = idx;
1873
1874 return skb->len;
1875}
1876
1877void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change)
1878{
1879 struct net *net = dev_net(dev);
1880 struct sk_buff *skb;
1881 int err = -ENOBUFS;
1882 size_t if_info_size;
1883
1884 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev)), GFP_KERNEL);
1885 if (skb == NULL)
1886 goto errout;
1887
1888 min_ifinfo_dump_size = max_t(u16, if_info_size, min_ifinfo_dump_size);
1889
1890 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0);
1891 if (err < 0) {
1892 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
1893 WARN_ON(err == -EMSGSIZE);
1894 kfree_skb(skb);
1895 goto errout;
1896 }
1897 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
1898 return;
1899errout:
1900 if (err < 0)
1901 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
1902}
1903
1904/* Protected by RTNL sempahore. */
1905static struct rtattr **rta_buf;
1906static int rtattr_max;
1907
1908/* Process one rtnetlink message. */
1909
1910static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1911{
1912 struct net *net = sock_net(skb->sk);
1913 rtnl_doit_func doit;
1914 int sz_idx, kind;
1915 int min_len;
1916 int family;
1917 int type;
1918 int err;
1919
1920 type = nlh->nlmsg_type;
1921 if (type > RTM_MAX)
1922 return -EOPNOTSUPP;
1923
1924 type -= RTM_BASE;
1925
1926 /* All the messages must have at least 1 byte length */
1927 if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg)))
1928 return 0;
1929
1930 family = ((struct rtgenmsg *)NLMSG_DATA(nlh))->rtgen_family;
1931 sz_idx = type>>2;
1932 kind = type&3;
1933
1934 if (kind != 2 && security_netlink_recv(skb, CAP_NET_ADMIN))
1935 return -EPERM;
1936
1937 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
1938 struct sock *rtnl;
1939 rtnl_dumpit_func dumpit;
1940 rtnl_calcit_func calcit;
1941 u16 min_dump_alloc = 0;
1942
1943 dumpit = rtnl_get_dumpit(family, type);
1944 if (dumpit == NULL)
1945 return -EOPNOTSUPP;
1946 calcit = rtnl_get_calcit(family, type);
1947 if (calcit)
1948 min_dump_alloc = calcit(skb);
1949
1950 __rtnl_unlock();
1951 rtnl = net->rtnl;
1952 err = netlink_dump_start(rtnl, skb, nlh, dumpit,
1953 NULL, min_dump_alloc);
1954 rtnl_lock();
1955 return err;
1956 }
1957
1958 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
1959
1960 min_len = rtm_min[sz_idx];
1961 if (nlh->nlmsg_len < min_len)
1962 return -EINVAL;
1963
1964 if (nlh->nlmsg_len > min_len) {
1965 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
1966 struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len);
1967
1968 while (RTA_OK(attr, attrlen)) {
1969 unsigned flavor = attr->rta_type;
1970 if (flavor) {
1971 if (flavor > rta_max[sz_idx])
1972 return -EINVAL;
1973 rta_buf[flavor-1] = attr;
1974 }
1975 attr = RTA_NEXT(attr, attrlen);
1976 }
1977 }
1978
1979 doit = rtnl_get_doit(family, type);
1980 if (doit == NULL)
1981 return -EOPNOTSUPP;
1982
1983 return doit(skb, nlh, (void *)&rta_buf[0]);
1984}
1985
1986static void rtnetlink_rcv(struct sk_buff *skb)
1987{
1988 rtnl_lock();
1989 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
1990 rtnl_unlock();
1991}
1992
1993static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
1994{
1995 struct net_device *dev = ptr;
1996
1997 switch (event) {
1998 case NETDEV_UP:
1999 case NETDEV_DOWN:
2000 case NETDEV_PRE_UP:
2001 case NETDEV_POST_INIT:
2002 case NETDEV_REGISTER:
2003 case NETDEV_CHANGE:
2004 case NETDEV_PRE_TYPE_CHANGE:
2005 case NETDEV_GOING_DOWN:
2006 case NETDEV_UNREGISTER:
2007 case NETDEV_UNREGISTER_BATCH:
2008 case NETDEV_RELEASE:
2009 case NETDEV_JOIN:
2010 break;
2011 default:
2012 rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
2013 break;
2014 }
2015 return NOTIFY_DONE;
2016}
2017
2018static struct notifier_block rtnetlink_dev_notifier = {
2019 .notifier_call = rtnetlink_event,
2020};
2021
2022
2023static int __net_init rtnetlink_net_init(struct net *net)
2024{
2025 struct sock *sk;
2026 sk = netlink_kernel_create(net, NETLINK_ROUTE, RTNLGRP_MAX,
2027 rtnetlink_rcv, &rtnl_mutex, THIS_MODULE);
2028 if (!sk)
2029 return -ENOMEM;
2030 net->rtnl = sk;
2031 return 0;
2032}
2033
2034static void __net_exit rtnetlink_net_exit(struct net *net)
2035{
2036 netlink_kernel_release(net->rtnl);
2037 net->rtnl = NULL;
2038}
2039
2040static struct pernet_operations rtnetlink_net_ops = {
2041 .init = rtnetlink_net_init,
2042 .exit = rtnetlink_net_exit,
2043};
2044
2045void __init rtnetlink_init(void)
2046{
2047 int i;
2048
2049 rtattr_max = 0;
2050 for (i = 0; i < ARRAY_SIZE(rta_max); i++)
2051 if (rta_max[i] > rtattr_max)
2052 rtattr_max = rta_max[i];
2053 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL);
2054 if (!rta_buf)
2055 panic("rtnetlink_init: cannot allocate rta_buf\n");
2056
2057 if (register_pernet_subsys(&rtnetlink_net_ops))
2058 panic("rtnetlink_init: cannot initialize rtnetlink\n");
2059
2060 netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV);
2061 register_netdevice_notifier(&rtnetlink_dev_notifier);
2062
2063 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
2064 rtnl_dump_ifinfo, rtnl_calcit);
2065 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
2066 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
2067 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
2068
2069 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
2070 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
2071}
2072
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * INET An implementation of the TCP/IP protocol suite for the LINUX
4 * operating system. INET is implemented using the BSD Socket
5 * interface as the means of communication with the user level.
6 *
7 * Routing netlink socket interface: protocol independent part.
8 *
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 *
11 * Fixes:
12 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
13 */
14
15#include <linux/bitops.h>
16#include <linux/errno.h>
17#include <linux/module.h>
18#include <linux/types.h>
19#include <linux/socket.h>
20#include <linux/kernel.h>
21#include <linux/timer.h>
22#include <linux/string.h>
23#include <linux/sockios.h>
24#include <linux/net.h>
25#include <linux/fcntl.h>
26#include <linux/mm.h>
27#include <linux/slab.h>
28#include <linux/interrupt.h>
29#include <linux/capability.h>
30#include <linux/skbuff.h>
31#include <linux/init.h>
32#include <linux/security.h>
33#include <linux/mutex.h>
34#include <linux/if_addr.h>
35#include <linux/if_bridge.h>
36#include <linux/if_vlan.h>
37#include <linux/pci.h>
38#include <linux/etherdevice.h>
39#include <linux/bpf.h>
40
41#include <linux/uaccess.h>
42
43#include <linux/inet.h>
44#include <linux/netdevice.h>
45#include <net/ip.h>
46#include <net/protocol.h>
47#include <net/arp.h>
48#include <net/route.h>
49#include <net/udp.h>
50#include <net/tcp.h>
51#include <net/sock.h>
52#include <net/pkt_sched.h>
53#include <net/fib_rules.h>
54#include <net/rtnetlink.h>
55#include <net/net_namespace.h>
56
57#define RTNL_MAX_TYPE 50
58#define RTNL_SLAVE_MAX_TYPE 36
59
60struct rtnl_link {
61 rtnl_doit_func doit;
62 rtnl_dumpit_func dumpit;
63 struct module *owner;
64 unsigned int flags;
65 struct rcu_head rcu;
66};
67
68static DEFINE_MUTEX(rtnl_mutex);
69
70void rtnl_lock(void)
71{
72 mutex_lock(&rtnl_mutex);
73}
74EXPORT_SYMBOL(rtnl_lock);
75
76int rtnl_lock_killable(void)
77{
78 return mutex_lock_killable(&rtnl_mutex);
79}
80EXPORT_SYMBOL(rtnl_lock_killable);
81
82static struct sk_buff *defer_kfree_skb_list;
83void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
84{
85 if (head && tail) {
86 tail->next = defer_kfree_skb_list;
87 defer_kfree_skb_list = head;
88 }
89}
90EXPORT_SYMBOL(rtnl_kfree_skbs);
91
92void __rtnl_unlock(void)
93{
94 struct sk_buff *head = defer_kfree_skb_list;
95
96 defer_kfree_skb_list = NULL;
97
98 mutex_unlock(&rtnl_mutex);
99
100 while (head) {
101 struct sk_buff *next = head->next;
102
103 kfree_skb(head);
104 cond_resched();
105 head = next;
106 }
107}
108
109void rtnl_unlock(void)
110{
111 /* This fellow will unlock it for us. */
112 netdev_run_todo();
113}
114EXPORT_SYMBOL(rtnl_unlock);
115
116int rtnl_trylock(void)
117{
118 return mutex_trylock(&rtnl_mutex);
119}
120EXPORT_SYMBOL(rtnl_trylock);
121
122int rtnl_is_locked(void)
123{
124 return mutex_is_locked(&rtnl_mutex);
125}
126EXPORT_SYMBOL(rtnl_is_locked);
127
128bool refcount_dec_and_rtnl_lock(refcount_t *r)
129{
130 return refcount_dec_and_mutex_lock(r, &rtnl_mutex);
131}
132EXPORT_SYMBOL(refcount_dec_and_rtnl_lock);
133
134#ifdef CONFIG_PROVE_LOCKING
135bool lockdep_rtnl_is_held(void)
136{
137 return lockdep_is_held(&rtnl_mutex);
138}
139EXPORT_SYMBOL(lockdep_rtnl_is_held);
140#endif /* #ifdef CONFIG_PROVE_LOCKING */
141
142static struct rtnl_link *__rcu *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
143
144static inline int rtm_msgindex(int msgtype)
145{
146 int msgindex = msgtype - RTM_BASE;
147
148 /*
149 * msgindex < 0 implies someone tried to register a netlink
150 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
151 * the message type has not been added to linux/rtnetlink.h
152 */
153 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
154
155 return msgindex;
156}
157
158static struct rtnl_link *rtnl_get_link(int protocol, int msgtype)
159{
160 struct rtnl_link **tab;
161
162 if (protocol >= ARRAY_SIZE(rtnl_msg_handlers))
163 protocol = PF_UNSPEC;
164
165 tab = rcu_dereference_rtnl(rtnl_msg_handlers[protocol]);
166 if (!tab)
167 tab = rcu_dereference_rtnl(rtnl_msg_handlers[PF_UNSPEC]);
168
169 return tab[msgtype];
170}
171
172static int rtnl_register_internal(struct module *owner,
173 int protocol, int msgtype,
174 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
175 unsigned int flags)
176{
177 struct rtnl_link *link, *old;
178 struct rtnl_link __rcu **tab;
179 int msgindex;
180 int ret = -ENOBUFS;
181
182 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
183 msgindex = rtm_msgindex(msgtype);
184
185 rtnl_lock();
186 tab = rtnl_msg_handlers[protocol];
187 if (tab == NULL) {
188 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(void *), GFP_KERNEL);
189 if (!tab)
190 goto unlock;
191
192 /* ensures we see the 0 stores */
193 rcu_assign_pointer(rtnl_msg_handlers[protocol], tab);
194 }
195
196 old = rtnl_dereference(tab[msgindex]);
197 if (old) {
198 link = kmemdup(old, sizeof(*old), GFP_KERNEL);
199 if (!link)
200 goto unlock;
201 } else {
202 link = kzalloc(sizeof(*link), GFP_KERNEL);
203 if (!link)
204 goto unlock;
205 }
206
207 WARN_ON(link->owner && link->owner != owner);
208 link->owner = owner;
209
210 WARN_ON(doit && link->doit && link->doit != doit);
211 if (doit)
212 link->doit = doit;
213 WARN_ON(dumpit && link->dumpit && link->dumpit != dumpit);
214 if (dumpit)
215 link->dumpit = dumpit;
216
217 link->flags |= flags;
218
219 /* publish protocol:msgtype */
220 rcu_assign_pointer(tab[msgindex], link);
221 ret = 0;
222 if (old)
223 kfree_rcu(old, rcu);
224unlock:
225 rtnl_unlock();
226 return ret;
227}
228
229/**
230 * rtnl_register_module - Register a rtnetlink message type
231 *
232 * @owner: module registering the hook (THIS_MODULE)
233 * @protocol: Protocol family or PF_UNSPEC
234 * @msgtype: rtnetlink message type
235 * @doit: Function pointer called for each request message
236 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
237 * @flags: rtnl_link_flags to modifiy behaviour of doit/dumpit functions
238 *
239 * Like rtnl_register, but for use by removable modules.
240 */
241int rtnl_register_module(struct module *owner,
242 int protocol, int msgtype,
243 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
244 unsigned int flags)
245{
246 return rtnl_register_internal(owner, protocol, msgtype,
247 doit, dumpit, flags);
248}
249EXPORT_SYMBOL_GPL(rtnl_register_module);
250
251/**
252 * rtnl_register - Register a rtnetlink message type
253 * @protocol: Protocol family or PF_UNSPEC
254 * @msgtype: rtnetlink message type
255 * @doit: Function pointer called for each request message
256 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
257 * @flags: rtnl_link_flags to modifiy behaviour of doit/dumpit functions
258 *
259 * Registers the specified function pointers (at least one of them has
260 * to be non-NULL) to be called whenever a request message for the
261 * specified protocol family and message type is received.
262 *
263 * The special protocol family PF_UNSPEC may be used to define fallback
264 * function pointers for the case when no entry for the specific protocol
265 * family exists.
266 */
267void rtnl_register(int protocol, int msgtype,
268 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
269 unsigned int flags)
270{
271 int err;
272
273 err = rtnl_register_internal(NULL, protocol, msgtype, doit, dumpit,
274 flags);
275 if (err)
276 pr_err("Unable to register rtnetlink message handler, "
277 "protocol = %d, message type = %d\n", protocol, msgtype);
278}
279
280/**
281 * rtnl_unregister - Unregister a rtnetlink message type
282 * @protocol: Protocol family or PF_UNSPEC
283 * @msgtype: rtnetlink message type
284 *
285 * Returns 0 on success or a negative error code.
286 */
287int rtnl_unregister(int protocol, int msgtype)
288{
289 struct rtnl_link **tab, *link;
290 int msgindex;
291
292 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
293 msgindex = rtm_msgindex(msgtype);
294
295 rtnl_lock();
296 tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
297 if (!tab) {
298 rtnl_unlock();
299 return -ENOENT;
300 }
301
302 link = tab[msgindex];
303 rcu_assign_pointer(tab[msgindex], NULL);
304 rtnl_unlock();
305
306 kfree_rcu(link, rcu);
307
308 return 0;
309}
310EXPORT_SYMBOL_GPL(rtnl_unregister);
311
312/**
313 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
314 * @protocol : Protocol family or PF_UNSPEC
315 *
316 * Identical to calling rtnl_unregster() for all registered message types
317 * of a certain protocol family.
318 */
319void rtnl_unregister_all(int protocol)
320{
321 struct rtnl_link **tab, *link;
322 int msgindex;
323
324 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
325
326 rtnl_lock();
327 tab = rtnl_msg_handlers[protocol];
328 if (!tab) {
329 rtnl_unlock();
330 return;
331 }
332 RCU_INIT_POINTER(rtnl_msg_handlers[protocol], NULL);
333 for (msgindex = 0; msgindex < RTM_NR_MSGTYPES; msgindex++) {
334 link = tab[msgindex];
335 if (!link)
336 continue;
337
338 rcu_assign_pointer(tab[msgindex], NULL);
339 kfree_rcu(link, rcu);
340 }
341 rtnl_unlock();
342
343 synchronize_net();
344
345 kfree(tab);
346}
347EXPORT_SYMBOL_GPL(rtnl_unregister_all);
348
349static LIST_HEAD(link_ops);
350
351static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
352{
353 const struct rtnl_link_ops *ops;
354
355 list_for_each_entry(ops, &link_ops, list) {
356 if (!strcmp(ops->kind, kind))
357 return ops;
358 }
359 return NULL;
360}
361
362/**
363 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
364 * @ops: struct rtnl_link_ops * to register
365 *
366 * The caller must hold the rtnl_mutex. This function should be used
367 * by drivers that create devices during module initialization. It
368 * must be called before registering the devices.
369 *
370 * Returns 0 on success or a negative error code.
371 */
372int __rtnl_link_register(struct rtnl_link_ops *ops)
373{
374 if (rtnl_link_ops_get(ops->kind))
375 return -EEXIST;
376
377 /* The check for setup is here because if ops
378 * does not have that filled up, it is not possible
379 * to use the ops for creating device. So do not
380 * fill up dellink as well. That disables rtnl_dellink.
381 */
382 if (ops->setup && !ops->dellink)
383 ops->dellink = unregister_netdevice_queue;
384
385 list_add_tail(&ops->list, &link_ops);
386 return 0;
387}
388EXPORT_SYMBOL_GPL(__rtnl_link_register);
389
390/**
391 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
392 * @ops: struct rtnl_link_ops * to register
393 *
394 * Returns 0 on success or a negative error code.
395 */
396int rtnl_link_register(struct rtnl_link_ops *ops)
397{
398 int err;
399
400 /* Sanity-check max sizes to avoid stack buffer overflow. */
401 if (WARN_ON(ops->maxtype > RTNL_MAX_TYPE ||
402 ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE))
403 return -EINVAL;
404
405 rtnl_lock();
406 err = __rtnl_link_register(ops);
407 rtnl_unlock();
408 return err;
409}
410EXPORT_SYMBOL_GPL(rtnl_link_register);
411
412static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
413{
414 struct net_device *dev;
415 LIST_HEAD(list_kill);
416
417 for_each_netdev(net, dev) {
418 if (dev->rtnl_link_ops == ops)
419 ops->dellink(dev, &list_kill);
420 }
421 unregister_netdevice_many(&list_kill);
422}
423
424/**
425 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
426 * @ops: struct rtnl_link_ops * to unregister
427 *
428 * The caller must hold the rtnl_mutex and guarantee net_namespace_list
429 * integrity (hold pernet_ops_rwsem for writing to close the race
430 * with setup_net() and cleanup_net()).
431 */
432void __rtnl_link_unregister(struct rtnl_link_ops *ops)
433{
434 struct net *net;
435
436 for_each_net(net) {
437 __rtnl_kill_links(net, ops);
438 }
439 list_del(&ops->list);
440}
441EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
442
443/* Return with the rtnl_lock held when there are no network
444 * devices unregistering in any network namespace.
445 */
446static void rtnl_lock_unregistering_all(void)
447{
448 struct net *net;
449 bool unregistering;
450 DEFINE_WAIT_FUNC(wait, woken_wake_function);
451
452 add_wait_queue(&netdev_unregistering_wq, &wait);
453 for (;;) {
454 unregistering = false;
455 rtnl_lock();
456 /* We held write locked pernet_ops_rwsem, and parallel
457 * setup_net() and cleanup_net() are not possible.
458 */
459 for_each_net(net) {
460 if (net->dev_unreg_count > 0) {
461 unregistering = true;
462 break;
463 }
464 }
465 if (!unregistering)
466 break;
467 __rtnl_unlock();
468
469 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
470 }
471 remove_wait_queue(&netdev_unregistering_wq, &wait);
472}
473
474/**
475 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
476 * @ops: struct rtnl_link_ops * to unregister
477 */
478void rtnl_link_unregister(struct rtnl_link_ops *ops)
479{
480 /* Close the race with setup_net() and cleanup_net() */
481 down_write(&pernet_ops_rwsem);
482 rtnl_lock_unregistering_all();
483 __rtnl_link_unregister(ops);
484 rtnl_unlock();
485 up_write(&pernet_ops_rwsem);
486}
487EXPORT_SYMBOL_GPL(rtnl_link_unregister);
488
489static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
490{
491 struct net_device *master_dev;
492 const struct rtnl_link_ops *ops;
493 size_t size = 0;
494
495 rcu_read_lock();
496
497 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
498 if (!master_dev)
499 goto out;
500
501 ops = master_dev->rtnl_link_ops;
502 if (!ops || !ops->get_slave_size)
503 goto out;
504 /* IFLA_INFO_SLAVE_DATA + nested data */
505 size = nla_total_size(sizeof(struct nlattr)) +
506 ops->get_slave_size(master_dev, dev);
507
508out:
509 rcu_read_unlock();
510 return size;
511}
512
513static size_t rtnl_link_get_size(const struct net_device *dev)
514{
515 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
516 size_t size;
517
518 if (!ops)
519 return 0;
520
521 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
522 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
523
524 if (ops->get_size)
525 /* IFLA_INFO_DATA + nested data */
526 size += nla_total_size(sizeof(struct nlattr)) +
527 ops->get_size(dev);
528
529 if (ops->get_xstats_size)
530 /* IFLA_INFO_XSTATS */
531 size += nla_total_size(ops->get_xstats_size(dev));
532
533 size += rtnl_link_get_slave_info_data_size(dev);
534
535 return size;
536}
537
538static LIST_HEAD(rtnl_af_ops);
539
540static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
541{
542 const struct rtnl_af_ops *ops;
543
544 list_for_each_entry_rcu(ops, &rtnl_af_ops, list) {
545 if (ops->family == family)
546 return ops;
547 }
548
549 return NULL;
550}
551
552/**
553 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
554 * @ops: struct rtnl_af_ops * to register
555 *
556 * Returns 0 on success or a negative error code.
557 */
558void rtnl_af_register(struct rtnl_af_ops *ops)
559{
560 rtnl_lock();
561 list_add_tail_rcu(&ops->list, &rtnl_af_ops);
562 rtnl_unlock();
563}
564EXPORT_SYMBOL_GPL(rtnl_af_register);
565
566/**
567 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
568 * @ops: struct rtnl_af_ops * to unregister
569 */
570void rtnl_af_unregister(struct rtnl_af_ops *ops)
571{
572 rtnl_lock();
573 list_del_rcu(&ops->list);
574 rtnl_unlock();
575
576 synchronize_rcu();
577}
578EXPORT_SYMBOL_GPL(rtnl_af_unregister);
579
580static size_t rtnl_link_get_af_size(const struct net_device *dev,
581 u32 ext_filter_mask)
582{
583 struct rtnl_af_ops *af_ops;
584 size_t size;
585
586 /* IFLA_AF_SPEC */
587 size = nla_total_size(sizeof(struct nlattr));
588
589 rcu_read_lock();
590 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
591 if (af_ops->get_link_af_size) {
592 /* AF_* + nested data */
593 size += nla_total_size(sizeof(struct nlattr)) +
594 af_ops->get_link_af_size(dev, ext_filter_mask);
595 }
596 }
597 rcu_read_unlock();
598
599 return size;
600}
601
602static bool rtnl_have_link_slave_info(const struct net_device *dev)
603{
604 struct net_device *master_dev;
605 bool ret = false;
606
607 rcu_read_lock();
608
609 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
610 if (master_dev && master_dev->rtnl_link_ops)
611 ret = true;
612 rcu_read_unlock();
613 return ret;
614}
615
616static int rtnl_link_slave_info_fill(struct sk_buff *skb,
617 const struct net_device *dev)
618{
619 struct net_device *master_dev;
620 const struct rtnl_link_ops *ops;
621 struct nlattr *slave_data;
622 int err;
623
624 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
625 if (!master_dev)
626 return 0;
627 ops = master_dev->rtnl_link_ops;
628 if (!ops)
629 return 0;
630 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
631 return -EMSGSIZE;
632 if (ops->fill_slave_info) {
633 slave_data = nla_nest_start_noflag(skb, IFLA_INFO_SLAVE_DATA);
634 if (!slave_data)
635 return -EMSGSIZE;
636 err = ops->fill_slave_info(skb, master_dev, dev);
637 if (err < 0)
638 goto err_cancel_slave_data;
639 nla_nest_end(skb, slave_data);
640 }
641 return 0;
642
643err_cancel_slave_data:
644 nla_nest_cancel(skb, slave_data);
645 return err;
646}
647
648static int rtnl_link_info_fill(struct sk_buff *skb,
649 const struct net_device *dev)
650{
651 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
652 struct nlattr *data;
653 int err;
654
655 if (!ops)
656 return 0;
657 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
658 return -EMSGSIZE;
659 if (ops->fill_xstats) {
660 err = ops->fill_xstats(skb, dev);
661 if (err < 0)
662 return err;
663 }
664 if (ops->fill_info) {
665 data = nla_nest_start_noflag(skb, IFLA_INFO_DATA);
666 if (data == NULL)
667 return -EMSGSIZE;
668 err = ops->fill_info(skb, dev);
669 if (err < 0)
670 goto err_cancel_data;
671 nla_nest_end(skb, data);
672 }
673 return 0;
674
675err_cancel_data:
676 nla_nest_cancel(skb, data);
677 return err;
678}
679
680static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
681{
682 struct nlattr *linkinfo;
683 int err = -EMSGSIZE;
684
685 linkinfo = nla_nest_start_noflag(skb, IFLA_LINKINFO);
686 if (linkinfo == NULL)
687 goto out;
688
689 err = rtnl_link_info_fill(skb, dev);
690 if (err < 0)
691 goto err_cancel_link;
692
693 err = rtnl_link_slave_info_fill(skb, dev);
694 if (err < 0)
695 goto err_cancel_link;
696
697 nla_nest_end(skb, linkinfo);
698 return 0;
699
700err_cancel_link:
701 nla_nest_cancel(skb, linkinfo);
702out:
703 return err;
704}
705
706int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
707{
708 struct sock *rtnl = net->rtnl;
709 int err = 0;
710
711 NETLINK_CB(skb).dst_group = group;
712 if (echo)
713 refcount_inc(&skb->users);
714 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
715 if (echo)
716 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
717 return err;
718}
719
720int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
721{
722 struct sock *rtnl = net->rtnl;
723
724 return nlmsg_unicast(rtnl, skb, pid);
725}
726EXPORT_SYMBOL(rtnl_unicast);
727
728void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
729 struct nlmsghdr *nlh, gfp_t flags)
730{
731 struct sock *rtnl = net->rtnl;
732 int report = 0;
733
734 if (nlh)
735 report = nlmsg_report(nlh);
736
737 nlmsg_notify(rtnl, skb, pid, group, report, flags);
738}
739EXPORT_SYMBOL(rtnl_notify);
740
741void rtnl_set_sk_err(struct net *net, u32 group, int error)
742{
743 struct sock *rtnl = net->rtnl;
744
745 netlink_set_err(rtnl, 0, group, error);
746}
747EXPORT_SYMBOL(rtnl_set_sk_err);
748
749int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
750{
751 struct nlattr *mx;
752 int i, valid = 0;
753
754 /* nothing is dumped for dst_default_metrics, so just skip the loop */
755 if (metrics == dst_default_metrics.metrics)
756 return 0;
757
758 mx = nla_nest_start_noflag(skb, RTA_METRICS);
759 if (mx == NULL)
760 return -ENOBUFS;
761
762 for (i = 0; i < RTAX_MAX; i++) {
763 if (metrics[i]) {
764 if (i == RTAX_CC_ALGO - 1) {
765 char tmp[TCP_CA_NAME_MAX], *name;
766
767 name = tcp_ca_get_name_by_key(metrics[i], tmp);
768 if (!name)
769 continue;
770 if (nla_put_string(skb, i + 1, name))
771 goto nla_put_failure;
772 } else if (i == RTAX_FEATURES - 1) {
773 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
774
775 if (!user_features)
776 continue;
777 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
778 if (nla_put_u32(skb, i + 1, user_features))
779 goto nla_put_failure;
780 } else {
781 if (nla_put_u32(skb, i + 1, metrics[i]))
782 goto nla_put_failure;
783 }
784 valid++;
785 }
786 }
787
788 if (!valid) {
789 nla_nest_cancel(skb, mx);
790 return 0;
791 }
792
793 return nla_nest_end(skb, mx);
794
795nla_put_failure:
796 nla_nest_cancel(skb, mx);
797 return -EMSGSIZE;
798}
799EXPORT_SYMBOL(rtnetlink_put_metrics);
800
801int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
802 long expires, u32 error)
803{
804 struct rta_cacheinfo ci = {
805 .rta_error = error,
806 .rta_id = id,
807 };
808
809 if (dst) {
810 ci.rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse);
811 ci.rta_used = dst->__use;
812 ci.rta_clntref = atomic_read(&dst->__refcnt);
813 }
814 if (expires) {
815 unsigned long clock;
816
817 clock = jiffies_to_clock_t(abs(expires));
818 clock = min_t(unsigned long, clock, INT_MAX);
819 ci.rta_expires = (expires > 0) ? clock : -clock;
820 }
821 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
822}
823EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
824
825static void set_operstate(struct net_device *dev, unsigned char transition)
826{
827 unsigned char operstate = dev->operstate;
828
829 switch (transition) {
830 case IF_OPER_UP:
831 if ((operstate == IF_OPER_DORMANT ||
832 operstate == IF_OPER_UNKNOWN) &&
833 !netif_dormant(dev))
834 operstate = IF_OPER_UP;
835 break;
836
837 case IF_OPER_DORMANT:
838 if (operstate == IF_OPER_UP ||
839 operstate == IF_OPER_UNKNOWN)
840 operstate = IF_OPER_DORMANT;
841 break;
842 }
843
844 if (dev->operstate != operstate) {
845 write_lock_bh(&dev_base_lock);
846 dev->operstate = operstate;
847 write_unlock_bh(&dev_base_lock);
848 netdev_state_change(dev);
849 }
850}
851
852static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
853{
854 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
855 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
856}
857
858static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
859 const struct ifinfomsg *ifm)
860{
861 unsigned int flags = ifm->ifi_flags;
862
863 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
864 if (ifm->ifi_change)
865 flags = (flags & ifm->ifi_change) |
866 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
867
868 return flags;
869}
870
871static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
872 const struct rtnl_link_stats64 *b)
873{
874 a->rx_packets = b->rx_packets;
875 a->tx_packets = b->tx_packets;
876 a->rx_bytes = b->rx_bytes;
877 a->tx_bytes = b->tx_bytes;
878 a->rx_errors = b->rx_errors;
879 a->tx_errors = b->tx_errors;
880 a->rx_dropped = b->rx_dropped;
881 a->tx_dropped = b->tx_dropped;
882
883 a->multicast = b->multicast;
884 a->collisions = b->collisions;
885
886 a->rx_length_errors = b->rx_length_errors;
887 a->rx_over_errors = b->rx_over_errors;
888 a->rx_crc_errors = b->rx_crc_errors;
889 a->rx_frame_errors = b->rx_frame_errors;
890 a->rx_fifo_errors = b->rx_fifo_errors;
891 a->rx_missed_errors = b->rx_missed_errors;
892
893 a->tx_aborted_errors = b->tx_aborted_errors;
894 a->tx_carrier_errors = b->tx_carrier_errors;
895 a->tx_fifo_errors = b->tx_fifo_errors;
896 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
897 a->tx_window_errors = b->tx_window_errors;
898
899 a->rx_compressed = b->rx_compressed;
900 a->tx_compressed = b->tx_compressed;
901
902 a->rx_nohandler = b->rx_nohandler;
903}
904
905/* All VF info */
906static inline int rtnl_vfinfo_size(const struct net_device *dev,
907 u32 ext_filter_mask)
908{
909 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) {
910 int num_vfs = dev_num_vf(dev->dev.parent);
911 size_t size = nla_total_size(0);
912 size += num_vfs *
913 (nla_total_size(0) +
914 nla_total_size(sizeof(struct ifla_vf_mac)) +
915 nla_total_size(sizeof(struct ifla_vf_broadcast)) +
916 nla_total_size(sizeof(struct ifla_vf_vlan)) +
917 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */
918 nla_total_size(MAX_VLAN_LIST_LEN *
919 sizeof(struct ifla_vf_vlan_info)) +
920 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
921 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
922 nla_total_size(sizeof(struct ifla_vf_rate)) +
923 nla_total_size(sizeof(struct ifla_vf_link_state)) +
924 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
925 nla_total_size(0) + /* nest IFLA_VF_STATS */
926 /* IFLA_VF_STATS_RX_PACKETS */
927 nla_total_size_64bit(sizeof(__u64)) +
928 /* IFLA_VF_STATS_TX_PACKETS */
929 nla_total_size_64bit(sizeof(__u64)) +
930 /* IFLA_VF_STATS_RX_BYTES */
931 nla_total_size_64bit(sizeof(__u64)) +
932 /* IFLA_VF_STATS_TX_BYTES */
933 nla_total_size_64bit(sizeof(__u64)) +
934 /* IFLA_VF_STATS_BROADCAST */
935 nla_total_size_64bit(sizeof(__u64)) +
936 /* IFLA_VF_STATS_MULTICAST */
937 nla_total_size_64bit(sizeof(__u64)) +
938 /* IFLA_VF_STATS_RX_DROPPED */
939 nla_total_size_64bit(sizeof(__u64)) +
940 /* IFLA_VF_STATS_TX_DROPPED */
941 nla_total_size_64bit(sizeof(__u64)) +
942 nla_total_size(sizeof(struct ifla_vf_trust)));
943 return size;
944 } else
945 return 0;
946}
947
948static size_t rtnl_port_size(const struct net_device *dev,
949 u32 ext_filter_mask)
950{
951 size_t port_size = nla_total_size(4) /* PORT_VF */
952 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
953 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
954 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
955 + nla_total_size(1) /* PROT_VDP_REQUEST */
956 + nla_total_size(2); /* PORT_VDP_RESPONSE */
957 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
958 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
959 + port_size;
960 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
961 + port_size;
962
963 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
964 !(ext_filter_mask & RTEXT_FILTER_VF))
965 return 0;
966 if (dev_num_vf(dev->dev.parent))
967 return port_self_size + vf_ports_size +
968 vf_port_size * dev_num_vf(dev->dev.parent);
969 else
970 return port_self_size;
971}
972
973static size_t rtnl_xdp_size(void)
974{
975 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */
976 nla_total_size(1) + /* XDP_ATTACHED */
977 nla_total_size(4) + /* XDP_PROG_ID (or 1st mode) */
978 nla_total_size(4); /* XDP_<mode>_PROG_ID */
979
980 return xdp_size;
981}
982
983static noinline size_t if_nlmsg_size(const struct net_device *dev,
984 u32 ext_filter_mask)
985{
986 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
987 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
988 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
989 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
990 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
991 + nla_total_size(sizeof(struct rtnl_link_stats))
992 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
993 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
994 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
995 + nla_total_size(4) /* IFLA_TXQLEN */
996 + nla_total_size(4) /* IFLA_WEIGHT */
997 + nla_total_size(4) /* IFLA_MTU */
998 + nla_total_size(4) /* IFLA_LINK */
999 + nla_total_size(4) /* IFLA_MASTER */
1000 + nla_total_size(1) /* IFLA_CARRIER */
1001 + nla_total_size(4) /* IFLA_PROMISCUITY */
1002 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
1003 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
1004 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
1005 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
1006 + nla_total_size(1) /* IFLA_OPERSTATE */
1007 + nla_total_size(1) /* IFLA_LINKMODE */
1008 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
1009 + nla_total_size(4) /* IFLA_LINK_NETNSID */
1010 + nla_total_size(4) /* IFLA_GROUP */
1011 + nla_total_size(ext_filter_mask
1012 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
1013 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
1014 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
1015 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
1016 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
1017 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
1018 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
1019 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
1020 + rtnl_xdp_size() /* IFLA_XDP */
1021 + nla_total_size(4) /* IFLA_EVENT */
1022 + nla_total_size(4) /* IFLA_NEW_NETNSID */
1023 + nla_total_size(4) /* IFLA_NEW_IFINDEX */
1024 + nla_total_size(1) /* IFLA_PROTO_DOWN */
1025 + nla_total_size(4) /* IFLA_TARGET_NETNSID */
1026 + nla_total_size(4) /* IFLA_CARRIER_UP_COUNT */
1027 + nla_total_size(4) /* IFLA_CARRIER_DOWN_COUNT */
1028 + nla_total_size(4) /* IFLA_MIN_MTU */
1029 + nla_total_size(4) /* IFLA_MAX_MTU */
1030 + 0;
1031}
1032
1033static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
1034{
1035 struct nlattr *vf_ports;
1036 struct nlattr *vf_port;
1037 int vf;
1038 int err;
1039
1040 vf_ports = nla_nest_start_noflag(skb, IFLA_VF_PORTS);
1041 if (!vf_ports)
1042 return -EMSGSIZE;
1043
1044 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
1045 vf_port = nla_nest_start_noflag(skb, IFLA_VF_PORT);
1046 if (!vf_port)
1047 goto nla_put_failure;
1048 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
1049 goto nla_put_failure;
1050 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
1051 if (err == -EMSGSIZE)
1052 goto nla_put_failure;
1053 if (err) {
1054 nla_nest_cancel(skb, vf_port);
1055 continue;
1056 }
1057 nla_nest_end(skb, vf_port);
1058 }
1059
1060 nla_nest_end(skb, vf_ports);
1061
1062 return 0;
1063
1064nla_put_failure:
1065 nla_nest_cancel(skb, vf_ports);
1066 return -EMSGSIZE;
1067}
1068
1069static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
1070{
1071 struct nlattr *port_self;
1072 int err;
1073
1074 port_self = nla_nest_start_noflag(skb, IFLA_PORT_SELF);
1075 if (!port_self)
1076 return -EMSGSIZE;
1077
1078 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
1079 if (err) {
1080 nla_nest_cancel(skb, port_self);
1081 return (err == -EMSGSIZE) ? err : 0;
1082 }
1083
1084 nla_nest_end(skb, port_self);
1085
1086 return 0;
1087}
1088
1089static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1090 u32 ext_filter_mask)
1091{
1092 int err;
1093
1094 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1095 !(ext_filter_mask & RTEXT_FILTER_VF))
1096 return 0;
1097
1098 err = rtnl_port_self_fill(skb, dev);
1099 if (err)
1100 return err;
1101
1102 if (dev_num_vf(dev->dev.parent)) {
1103 err = rtnl_vf_ports_fill(skb, dev);
1104 if (err)
1105 return err;
1106 }
1107
1108 return 0;
1109}
1110
1111static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1112{
1113 int err;
1114 struct netdev_phys_item_id ppid;
1115
1116 err = dev_get_phys_port_id(dev, &ppid);
1117 if (err) {
1118 if (err == -EOPNOTSUPP)
1119 return 0;
1120 return err;
1121 }
1122
1123 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1124 return -EMSGSIZE;
1125
1126 return 0;
1127}
1128
1129static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1130{
1131 char name[IFNAMSIZ];
1132 int err;
1133
1134 err = dev_get_phys_port_name(dev, name, sizeof(name));
1135 if (err) {
1136 if (err == -EOPNOTSUPP)
1137 return 0;
1138 return err;
1139 }
1140
1141 if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
1142 return -EMSGSIZE;
1143
1144 return 0;
1145}
1146
1147static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1148{
1149 struct netdev_phys_item_id ppid = { };
1150 int err;
1151
1152 err = dev_get_port_parent_id(dev, &ppid, false);
1153 if (err) {
1154 if (err == -EOPNOTSUPP)
1155 return 0;
1156 return err;
1157 }
1158
1159 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, ppid.id_len, ppid.id))
1160 return -EMSGSIZE;
1161
1162 return 0;
1163}
1164
1165static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1166 struct net_device *dev)
1167{
1168 struct rtnl_link_stats64 *sp;
1169 struct nlattr *attr;
1170
1171 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1172 sizeof(struct rtnl_link_stats64), IFLA_PAD);
1173 if (!attr)
1174 return -EMSGSIZE;
1175
1176 sp = nla_data(attr);
1177 dev_get_stats(dev, sp);
1178
1179 attr = nla_reserve(skb, IFLA_STATS,
1180 sizeof(struct rtnl_link_stats));
1181 if (!attr)
1182 return -EMSGSIZE;
1183
1184 copy_rtnl_link_stats(nla_data(attr), sp);
1185
1186 return 0;
1187}
1188
1189static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1190 struct net_device *dev,
1191 int vfs_num,
1192 struct nlattr *vfinfo)
1193{
1194 struct ifla_vf_rss_query_en vf_rss_query_en;
1195 struct nlattr *vf, *vfstats, *vfvlanlist;
1196 struct ifla_vf_link_state vf_linkstate;
1197 struct ifla_vf_vlan_info vf_vlan_info;
1198 struct ifla_vf_spoofchk vf_spoofchk;
1199 struct ifla_vf_tx_rate vf_tx_rate;
1200 struct ifla_vf_stats vf_stats;
1201 struct ifla_vf_trust vf_trust;
1202 struct ifla_vf_vlan vf_vlan;
1203 struct ifla_vf_rate vf_rate;
1204 struct ifla_vf_mac vf_mac;
1205 struct ifla_vf_broadcast vf_broadcast;
1206 struct ifla_vf_info ivi;
1207
1208 memset(&ivi, 0, sizeof(ivi));
1209
1210 /* Not all SR-IOV capable drivers support the
1211 * spoofcheck and "RSS query enable" query. Preset to
1212 * -1 so the user space tool can detect that the driver
1213 * didn't report anything.
1214 */
1215 ivi.spoofchk = -1;
1216 ivi.rss_query_en = -1;
1217 ivi.trusted = -1;
1218 /* The default value for VF link state is "auto"
1219 * IFLA_VF_LINK_STATE_AUTO which equals zero
1220 */
1221 ivi.linkstate = 0;
1222 /* VLAN Protocol by default is 802.1Q */
1223 ivi.vlan_proto = htons(ETH_P_8021Q);
1224 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1225 return 0;
1226
1227 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
1228
1229 vf_mac.vf =
1230 vf_vlan.vf =
1231 vf_vlan_info.vf =
1232 vf_rate.vf =
1233 vf_tx_rate.vf =
1234 vf_spoofchk.vf =
1235 vf_linkstate.vf =
1236 vf_rss_query_en.vf =
1237 vf_trust.vf = ivi.vf;
1238
1239 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1240 memcpy(vf_broadcast.broadcast, dev->broadcast, dev->addr_len);
1241 vf_vlan.vlan = ivi.vlan;
1242 vf_vlan.qos = ivi.qos;
1243 vf_vlan_info.vlan = ivi.vlan;
1244 vf_vlan_info.qos = ivi.qos;
1245 vf_vlan_info.vlan_proto = ivi.vlan_proto;
1246 vf_tx_rate.rate = ivi.max_tx_rate;
1247 vf_rate.min_tx_rate = ivi.min_tx_rate;
1248 vf_rate.max_tx_rate = ivi.max_tx_rate;
1249 vf_spoofchk.setting = ivi.spoofchk;
1250 vf_linkstate.link_state = ivi.linkstate;
1251 vf_rss_query_en.setting = ivi.rss_query_en;
1252 vf_trust.setting = ivi.trusted;
1253 vf = nla_nest_start_noflag(skb, IFLA_VF_INFO);
1254 if (!vf)
1255 goto nla_put_vfinfo_failure;
1256 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1257 nla_put(skb, IFLA_VF_BROADCAST, sizeof(vf_broadcast), &vf_broadcast) ||
1258 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1259 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1260 &vf_rate) ||
1261 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1262 &vf_tx_rate) ||
1263 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1264 &vf_spoofchk) ||
1265 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1266 &vf_linkstate) ||
1267 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1268 sizeof(vf_rss_query_en),
1269 &vf_rss_query_en) ||
1270 nla_put(skb, IFLA_VF_TRUST,
1271 sizeof(vf_trust), &vf_trust))
1272 goto nla_put_vf_failure;
1273 vfvlanlist = nla_nest_start_noflag(skb, IFLA_VF_VLAN_LIST);
1274 if (!vfvlanlist)
1275 goto nla_put_vf_failure;
1276 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1277 &vf_vlan_info)) {
1278 nla_nest_cancel(skb, vfvlanlist);
1279 goto nla_put_vf_failure;
1280 }
1281 nla_nest_end(skb, vfvlanlist);
1282 memset(&vf_stats, 0, sizeof(vf_stats));
1283 if (dev->netdev_ops->ndo_get_vf_stats)
1284 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1285 &vf_stats);
1286 vfstats = nla_nest_start_noflag(skb, IFLA_VF_STATS);
1287 if (!vfstats)
1288 goto nla_put_vf_failure;
1289 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1290 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1291 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1292 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1293 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1294 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1295 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1296 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1297 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1298 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1299 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
1300 vf_stats.multicast, IFLA_VF_STATS_PAD) ||
1301 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_DROPPED,
1302 vf_stats.rx_dropped, IFLA_VF_STATS_PAD) ||
1303 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_DROPPED,
1304 vf_stats.tx_dropped, IFLA_VF_STATS_PAD)) {
1305 nla_nest_cancel(skb, vfstats);
1306 goto nla_put_vf_failure;
1307 }
1308 nla_nest_end(skb, vfstats);
1309 nla_nest_end(skb, vf);
1310 return 0;
1311
1312nla_put_vf_failure:
1313 nla_nest_cancel(skb, vf);
1314nla_put_vfinfo_failure:
1315 nla_nest_cancel(skb, vfinfo);
1316 return -EMSGSIZE;
1317}
1318
1319static noinline_for_stack int rtnl_fill_vf(struct sk_buff *skb,
1320 struct net_device *dev,
1321 u32 ext_filter_mask)
1322{
1323 struct nlattr *vfinfo;
1324 int i, num_vfs;
1325
1326 if (!dev->dev.parent || ((ext_filter_mask & RTEXT_FILTER_VF) == 0))
1327 return 0;
1328
1329 num_vfs = dev_num_vf(dev->dev.parent);
1330 if (nla_put_u32(skb, IFLA_NUM_VF, num_vfs))
1331 return -EMSGSIZE;
1332
1333 if (!dev->netdev_ops->ndo_get_vf_config)
1334 return 0;
1335
1336 vfinfo = nla_nest_start_noflag(skb, IFLA_VFINFO_LIST);
1337 if (!vfinfo)
1338 return -EMSGSIZE;
1339
1340 for (i = 0; i < num_vfs; i++) {
1341 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1342 return -EMSGSIZE;
1343 }
1344
1345 nla_nest_end(skb, vfinfo);
1346 return 0;
1347}
1348
1349static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1350{
1351 struct rtnl_link_ifmap map;
1352
1353 memset(&map, 0, sizeof(map));
1354 map.mem_start = dev->mem_start;
1355 map.mem_end = dev->mem_end;
1356 map.base_addr = dev->base_addr;
1357 map.irq = dev->irq;
1358 map.dma = dev->dma;
1359 map.port = dev->if_port;
1360
1361 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
1362 return -EMSGSIZE;
1363
1364 return 0;
1365}
1366
1367static u32 rtnl_xdp_prog_skb(struct net_device *dev)
1368{
1369 const struct bpf_prog *generic_xdp_prog;
1370
1371 ASSERT_RTNL();
1372
1373 generic_xdp_prog = rtnl_dereference(dev->xdp_prog);
1374 if (!generic_xdp_prog)
1375 return 0;
1376 return generic_xdp_prog->aux->id;
1377}
1378
1379static u32 rtnl_xdp_prog_drv(struct net_device *dev)
1380{
1381 return __dev_xdp_query(dev, dev->netdev_ops->ndo_bpf, XDP_QUERY_PROG);
1382}
1383
1384static u32 rtnl_xdp_prog_hw(struct net_device *dev)
1385{
1386 return __dev_xdp_query(dev, dev->netdev_ops->ndo_bpf,
1387 XDP_QUERY_PROG_HW);
1388}
1389
1390static int rtnl_xdp_report_one(struct sk_buff *skb, struct net_device *dev,
1391 u32 *prog_id, u8 *mode, u8 tgt_mode, u32 attr,
1392 u32 (*get_prog_id)(struct net_device *dev))
1393{
1394 u32 curr_id;
1395 int err;
1396
1397 curr_id = get_prog_id(dev);
1398 if (!curr_id)
1399 return 0;
1400
1401 *prog_id = curr_id;
1402 err = nla_put_u32(skb, attr, curr_id);
1403 if (err)
1404 return err;
1405
1406 if (*mode != XDP_ATTACHED_NONE)
1407 *mode = XDP_ATTACHED_MULTI;
1408 else
1409 *mode = tgt_mode;
1410
1411 return 0;
1412}
1413
1414static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1415{
1416 struct nlattr *xdp;
1417 u32 prog_id;
1418 int err;
1419 u8 mode;
1420
1421 xdp = nla_nest_start_noflag(skb, IFLA_XDP);
1422 if (!xdp)
1423 return -EMSGSIZE;
1424
1425 prog_id = 0;
1426 mode = XDP_ATTACHED_NONE;
1427 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_SKB,
1428 IFLA_XDP_SKB_PROG_ID, rtnl_xdp_prog_skb);
1429 if (err)
1430 goto err_cancel;
1431 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_DRV,
1432 IFLA_XDP_DRV_PROG_ID, rtnl_xdp_prog_drv);
1433 if (err)
1434 goto err_cancel;
1435 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_HW,
1436 IFLA_XDP_HW_PROG_ID, rtnl_xdp_prog_hw);
1437 if (err)
1438 goto err_cancel;
1439
1440 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, mode);
1441 if (err)
1442 goto err_cancel;
1443
1444 if (prog_id && mode != XDP_ATTACHED_MULTI) {
1445 err = nla_put_u32(skb, IFLA_XDP_PROG_ID, prog_id);
1446 if (err)
1447 goto err_cancel;
1448 }
1449
1450 nla_nest_end(skb, xdp);
1451 return 0;
1452
1453err_cancel:
1454 nla_nest_cancel(skb, xdp);
1455 return err;
1456}
1457
1458static u32 rtnl_get_event(unsigned long event)
1459{
1460 u32 rtnl_event_type = IFLA_EVENT_NONE;
1461
1462 switch (event) {
1463 case NETDEV_REBOOT:
1464 rtnl_event_type = IFLA_EVENT_REBOOT;
1465 break;
1466 case NETDEV_FEAT_CHANGE:
1467 rtnl_event_type = IFLA_EVENT_FEATURES;
1468 break;
1469 case NETDEV_BONDING_FAILOVER:
1470 rtnl_event_type = IFLA_EVENT_BONDING_FAILOVER;
1471 break;
1472 case NETDEV_NOTIFY_PEERS:
1473 rtnl_event_type = IFLA_EVENT_NOTIFY_PEERS;
1474 break;
1475 case NETDEV_RESEND_IGMP:
1476 rtnl_event_type = IFLA_EVENT_IGMP_RESEND;
1477 break;
1478 case NETDEV_CHANGEINFODATA:
1479 rtnl_event_type = IFLA_EVENT_BONDING_OPTIONS;
1480 break;
1481 default:
1482 break;
1483 }
1484
1485 return rtnl_event_type;
1486}
1487
1488static int put_master_ifindex(struct sk_buff *skb, struct net_device *dev)
1489{
1490 const struct net_device *upper_dev;
1491 int ret = 0;
1492
1493 rcu_read_lock();
1494
1495 upper_dev = netdev_master_upper_dev_get_rcu(dev);
1496 if (upper_dev)
1497 ret = nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex);
1498
1499 rcu_read_unlock();
1500 return ret;
1501}
1502
1503static int nla_put_iflink(struct sk_buff *skb, const struct net_device *dev,
1504 bool force)
1505{
1506 int ifindex = dev_get_iflink(dev);
1507
1508 if (force || dev->ifindex != ifindex)
1509 return nla_put_u32(skb, IFLA_LINK, ifindex);
1510
1511 return 0;
1512}
1513
1514static noinline_for_stack int nla_put_ifalias(struct sk_buff *skb,
1515 struct net_device *dev)
1516{
1517 char buf[IFALIASZ];
1518 int ret;
1519
1520 ret = dev_get_alias(dev, buf, sizeof(buf));
1521 return ret > 0 ? nla_put_string(skb, IFLA_IFALIAS, buf) : 0;
1522}
1523
1524static int rtnl_fill_link_netnsid(struct sk_buff *skb,
1525 const struct net_device *dev,
1526 struct net *src_net, gfp_t gfp)
1527{
1528 bool put_iflink = false;
1529
1530 if (dev->rtnl_link_ops && dev->rtnl_link_ops->get_link_net) {
1531 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1532
1533 if (!net_eq(dev_net(dev), link_net)) {
1534 int id = peernet2id_alloc(src_net, link_net, gfp);
1535
1536 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1537 return -EMSGSIZE;
1538
1539 put_iflink = true;
1540 }
1541 }
1542
1543 return nla_put_iflink(skb, dev, put_iflink);
1544}
1545
1546static int rtnl_fill_link_af(struct sk_buff *skb,
1547 const struct net_device *dev,
1548 u32 ext_filter_mask)
1549{
1550 const struct rtnl_af_ops *af_ops;
1551 struct nlattr *af_spec;
1552
1553 af_spec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
1554 if (!af_spec)
1555 return -EMSGSIZE;
1556
1557 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
1558 struct nlattr *af;
1559 int err;
1560
1561 if (!af_ops->fill_link_af)
1562 continue;
1563
1564 af = nla_nest_start_noflag(skb, af_ops->family);
1565 if (!af)
1566 return -EMSGSIZE;
1567
1568 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1569 /*
1570 * Caller may return ENODATA to indicate that there
1571 * was no data to be dumped. This is not an error, it
1572 * means we should trim the attribute header and
1573 * continue.
1574 */
1575 if (err == -ENODATA)
1576 nla_nest_cancel(skb, af);
1577 else if (err < 0)
1578 return -EMSGSIZE;
1579
1580 nla_nest_end(skb, af);
1581 }
1582
1583 nla_nest_end(skb, af_spec);
1584 return 0;
1585}
1586
1587static int rtnl_fill_ifinfo(struct sk_buff *skb,
1588 struct net_device *dev, struct net *src_net,
1589 int type, u32 pid, u32 seq, u32 change,
1590 unsigned int flags, u32 ext_filter_mask,
1591 u32 event, int *new_nsid, int new_ifindex,
1592 int tgt_netnsid, gfp_t gfp)
1593{
1594 struct ifinfomsg *ifm;
1595 struct nlmsghdr *nlh;
1596
1597 ASSERT_RTNL();
1598 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1599 if (nlh == NULL)
1600 return -EMSGSIZE;
1601
1602 ifm = nlmsg_data(nlh);
1603 ifm->ifi_family = AF_UNSPEC;
1604 ifm->__ifi_pad = 0;
1605 ifm->ifi_type = dev->type;
1606 ifm->ifi_index = dev->ifindex;
1607 ifm->ifi_flags = dev_get_flags(dev);
1608 ifm->ifi_change = change;
1609
1610 if (tgt_netnsid >= 0 && nla_put_s32(skb, IFLA_TARGET_NETNSID, tgt_netnsid))
1611 goto nla_put_failure;
1612
1613 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1614 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1615 nla_put_u8(skb, IFLA_OPERSTATE,
1616 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1617 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1618 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1619 nla_put_u32(skb, IFLA_MIN_MTU, dev->min_mtu) ||
1620 nla_put_u32(skb, IFLA_MAX_MTU, dev->max_mtu) ||
1621 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1622 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
1623 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1624 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1625 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1626#ifdef CONFIG_RPS
1627 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1628#endif
1629 put_master_ifindex(skb, dev) ||
1630 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1631 (dev->qdisc &&
1632 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1633 nla_put_ifalias(skb, dev) ||
1634 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1635 atomic_read(&dev->carrier_up_count) +
1636 atomic_read(&dev->carrier_down_count)) ||
1637 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down) ||
1638 nla_put_u32(skb, IFLA_CARRIER_UP_COUNT,
1639 atomic_read(&dev->carrier_up_count)) ||
1640 nla_put_u32(skb, IFLA_CARRIER_DOWN_COUNT,
1641 atomic_read(&dev->carrier_down_count)))
1642 goto nla_put_failure;
1643
1644 if (event != IFLA_EVENT_NONE) {
1645 if (nla_put_u32(skb, IFLA_EVENT, event))
1646 goto nla_put_failure;
1647 }
1648
1649 if (rtnl_fill_link_ifmap(skb, dev))
1650 goto nla_put_failure;
1651
1652 if (dev->addr_len) {
1653 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1654 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1655 goto nla_put_failure;
1656 }
1657
1658 if (rtnl_phys_port_id_fill(skb, dev))
1659 goto nla_put_failure;
1660
1661 if (rtnl_phys_port_name_fill(skb, dev))
1662 goto nla_put_failure;
1663
1664 if (rtnl_phys_switch_id_fill(skb, dev))
1665 goto nla_put_failure;
1666
1667 if (rtnl_fill_stats(skb, dev))
1668 goto nla_put_failure;
1669
1670 if (rtnl_fill_vf(skb, dev, ext_filter_mask))
1671 goto nla_put_failure;
1672
1673 if (rtnl_port_fill(skb, dev, ext_filter_mask))
1674 goto nla_put_failure;
1675
1676 if (rtnl_xdp_fill(skb, dev))
1677 goto nla_put_failure;
1678
1679 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1680 if (rtnl_link_fill(skb, dev) < 0)
1681 goto nla_put_failure;
1682 }
1683
1684 if (rtnl_fill_link_netnsid(skb, dev, src_net, gfp))
1685 goto nla_put_failure;
1686
1687 if (new_nsid &&
1688 nla_put_s32(skb, IFLA_NEW_NETNSID, *new_nsid) < 0)
1689 goto nla_put_failure;
1690 if (new_ifindex &&
1691 nla_put_s32(skb, IFLA_NEW_IFINDEX, new_ifindex) < 0)
1692 goto nla_put_failure;
1693
1694
1695 rcu_read_lock();
1696 if (rtnl_fill_link_af(skb, dev, ext_filter_mask))
1697 goto nla_put_failure_rcu;
1698 rcu_read_unlock();
1699
1700 nlmsg_end(skb, nlh);
1701 return 0;
1702
1703nla_put_failure_rcu:
1704 rcu_read_unlock();
1705nla_put_failure:
1706 nlmsg_cancel(skb, nlh);
1707 return -EMSGSIZE;
1708}
1709
1710static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1711 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1712 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1713 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1714 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1715 [IFLA_MTU] = { .type = NLA_U32 },
1716 [IFLA_LINK] = { .type = NLA_U32 },
1717 [IFLA_MASTER] = { .type = NLA_U32 },
1718 [IFLA_CARRIER] = { .type = NLA_U8 },
1719 [IFLA_TXQLEN] = { .type = NLA_U32 },
1720 [IFLA_WEIGHT] = { .type = NLA_U32 },
1721 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1722 [IFLA_LINKMODE] = { .type = NLA_U8 },
1723 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1724 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1725 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1726 /* IFLA_IFALIAS is a string, but policy is set to NLA_BINARY to
1727 * allow 0-length string (needed to remove an alias).
1728 */
1729 [IFLA_IFALIAS] = { .type = NLA_BINARY, .len = IFALIASZ - 1 },
1730 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1731 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1732 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1733 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1734 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1735 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1736 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1737 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1738 [IFLA_GSO_MAX_SEGS] = { .type = NLA_U32 },
1739 [IFLA_GSO_MAX_SIZE] = { .type = NLA_U32 },
1740 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1741 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
1742 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1743 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
1744 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
1745 [IFLA_XDP] = { .type = NLA_NESTED },
1746 [IFLA_EVENT] = { .type = NLA_U32 },
1747 [IFLA_GROUP] = { .type = NLA_U32 },
1748 [IFLA_TARGET_NETNSID] = { .type = NLA_S32 },
1749 [IFLA_CARRIER_UP_COUNT] = { .type = NLA_U32 },
1750 [IFLA_CARRIER_DOWN_COUNT] = { .type = NLA_U32 },
1751 [IFLA_MIN_MTU] = { .type = NLA_U32 },
1752 [IFLA_MAX_MTU] = { .type = NLA_U32 },
1753};
1754
1755static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1756 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1757 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1758 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1759 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
1760};
1761
1762static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1763 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1764 [IFLA_VF_BROADCAST] = { .type = NLA_REJECT },
1765 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1766 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
1767 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1768 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1769 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1770 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
1771 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
1772 [IFLA_VF_STATS] = { .type = NLA_NESTED },
1773 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
1774 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1775 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1776};
1777
1778static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1779 [IFLA_PORT_VF] = { .type = NLA_U32 },
1780 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1781 .len = PORT_PROFILE_MAX },
1782 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1783 .len = PORT_UUID_MAX },
1784 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1785 .len = PORT_UUID_MAX },
1786 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1787 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1788
1789 /* Unused, but we need to keep it here since user space could
1790 * fill it. It's also broken with regard to NLA_BINARY use in
1791 * combination with structs.
1792 */
1793 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1794 .len = sizeof(struct ifla_port_vsi) },
1795};
1796
1797static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
1798 [IFLA_XDP_FD] = { .type = NLA_S32 },
1799 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
1800 [IFLA_XDP_FLAGS] = { .type = NLA_U32 },
1801 [IFLA_XDP_PROG_ID] = { .type = NLA_U32 },
1802};
1803
1804static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1805{
1806 const struct rtnl_link_ops *ops = NULL;
1807 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1808
1809 if (nla_parse_nested_deprecated(linfo, IFLA_INFO_MAX, nla, ifla_info_policy, NULL) < 0)
1810 return NULL;
1811
1812 if (linfo[IFLA_INFO_KIND]) {
1813 char kind[MODULE_NAME_LEN];
1814
1815 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1816 ops = rtnl_link_ops_get(kind);
1817 }
1818
1819 return ops;
1820}
1821
1822static bool link_master_filtered(struct net_device *dev, int master_idx)
1823{
1824 struct net_device *master;
1825
1826 if (!master_idx)
1827 return false;
1828
1829 master = netdev_master_upper_dev_get(dev);
1830 if (!master || master->ifindex != master_idx)
1831 return true;
1832
1833 return false;
1834}
1835
1836static bool link_kind_filtered(const struct net_device *dev,
1837 const struct rtnl_link_ops *kind_ops)
1838{
1839 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1840 return true;
1841
1842 return false;
1843}
1844
1845static bool link_dump_filtered(struct net_device *dev,
1846 int master_idx,
1847 const struct rtnl_link_ops *kind_ops)
1848{
1849 if (link_master_filtered(dev, master_idx) ||
1850 link_kind_filtered(dev, kind_ops))
1851 return true;
1852
1853 return false;
1854}
1855
1856/**
1857 * rtnl_get_net_ns_capable - Get netns if sufficiently privileged.
1858 * @sk: netlink socket
1859 * @netnsid: network namespace identifier
1860 *
1861 * Returns the network namespace identified by netnsid on success or an error
1862 * pointer on failure.
1863 */
1864struct net *rtnl_get_net_ns_capable(struct sock *sk, int netnsid)
1865{
1866 struct net *net;
1867
1868 net = get_net_ns_by_id(sock_net(sk), netnsid);
1869 if (!net)
1870 return ERR_PTR(-EINVAL);
1871
1872 /* For now, the caller is required to have CAP_NET_ADMIN in
1873 * the user namespace owning the target net ns.
1874 */
1875 if (!sk_ns_capable(sk, net->user_ns, CAP_NET_ADMIN)) {
1876 put_net(net);
1877 return ERR_PTR(-EACCES);
1878 }
1879 return net;
1880}
1881EXPORT_SYMBOL_GPL(rtnl_get_net_ns_capable);
1882
1883static int rtnl_valid_dump_ifinfo_req(const struct nlmsghdr *nlh,
1884 bool strict_check, struct nlattr **tb,
1885 struct netlink_ext_ack *extack)
1886{
1887 int hdrlen;
1888
1889 if (strict_check) {
1890 struct ifinfomsg *ifm;
1891
1892 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
1893 NL_SET_ERR_MSG(extack, "Invalid header for link dump");
1894 return -EINVAL;
1895 }
1896
1897 ifm = nlmsg_data(nlh);
1898 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
1899 ifm->ifi_change) {
1900 NL_SET_ERR_MSG(extack, "Invalid values in header for link dump request");
1901 return -EINVAL;
1902 }
1903 if (ifm->ifi_index) {
1904 NL_SET_ERR_MSG(extack, "Filter by device index not supported for link dumps");
1905 return -EINVAL;
1906 }
1907
1908 return nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb,
1909 IFLA_MAX, ifla_policy,
1910 extack);
1911 }
1912
1913 /* A hack to preserve kernel<->userspace interface.
1914 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1915 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1916 * what iproute2 < v3.9.0 used.
1917 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1918 * attribute, its netlink message is shorter than struct ifinfomsg.
1919 */
1920 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
1921 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1922
1923 return nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy,
1924 extack);
1925}
1926
1927static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1928{
1929 struct netlink_ext_ack *extack = cb->extack;
1930 const struct nlmsghdr *nlh = cb->nlh;
1931 struct net *net = sock_net(skb->sk);
1932 struct net *tgt_net = net;
1933 int h, s_h;
1934 int idx = 0, s_idx;
1935 struct net_device *dev;
1936 struct hlist_head *head;
1937 struct nlattr *tb[IFLA_MAX+1];
1938 u32 ext_filter_mask = 0;
1939 const struct rtnl_link_ops *kind_ops = NULL;
1940 unsigned int flags = NLM_F_MULTI;
1941 int master_idx = 0;
1942 int netnsid = -1;
1943 int err, i;
1944
1945 s_h = cb->args[0];
1946 s_idx = cb->args[1];
1947
1948 err = rtnl_valid_dump_ifinfo_req(nlh, cb->strict_check, tb, extack);
1949 if (err < 0) {
1950 if (cb->strict_check)
1951 return err;
1952
1953 goto walk_entries;
1954 }
1955
1956 for (i = 0; i <= IFLA_MAX; ++i) {
1957 if (!tb[i])
1958 continue;
1959
1960 /* new attributes should only be added with strict checking */
1961 switch (i) {
1962 case IFLA_TARGET_NETNSID:
1963 netnsid = nla_get_s32(tb[i]);
1964 tgt_net = rtnl_get_net_ns_capable(skb->sk, netnsid);
1965 if (IS_ERR(tgt_net)) {
1966 NL_SET_ERR_MSG(extack, "Invalid target network namespace id");
1967 return PTR_ERR(tgt_net);
1968 }
1969 break;
1970 case IFLA_EXT_MASK:
1971 ext_filter_mask = nla_get_u32(tb[i]);
1972 break;
1973 case IFLA_MASTER:
1974 master_idx = nla_get_u32(tb[i]);
1975 break;
1976 case IFLA_LINKINFO:
1977 kind_ops = linkinfo_to_kind_ops(tb[i]);
1978 break;
1979 default:
1980 if (cb->strict_check) {
1981 NL_SET_ERR_MSG(extack, "Unsupported attribute in link dump request");
1982 return -EINVAL;
1983 }
1984 }
1985 }
1986
1987 if (master_idx || kind_ops)
1988 flags |= NLM_F_DUMP_FILTERED;
1989
1990walk_entries:
1991 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1992 idx = 0;
1993 head = &tgt_net->dev_index_head[h];
1994 hlist_for_each_entry(dev, head, index_hlist) {
1995 if (link_dump_filtered(dev, master_idx, kind_ops))
1996 goto cont;
1997 if (idx < s_idx)
1998 goto cont;
1999 err = rtnl_fill_ifinfo(skb, dev, net,
2000 RTM_NEWLINK,
2001 NETLINK_CB(cb->skb).portid,
2002 nlh->nlmsg_seq, 0, flags,
2003 ext_filter_mask, 0, NULL, 0,
2004 netnsid, GFP_KERNEL);
2005
2006 if (err < 0) {
2007 if (likely(skb->len))
2008 goto out;
2009
2010 goto out_err;
2011 }
2012cont:
2013 idx++;
2014 }
2015 }
2016out:
2017 err = skb->len;
2018out_err:
2019 cb->args[1] = idx;
2020 cb->args[0] = h;
2021 cb->seq = net->dev_base_seq;
2022 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
2023 if (netnsid >= 0)
2024 put_net(tgt_net);
2025
2026 return err;
2027}
2028
2029int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
2030 struct netlink_ext_ack *exterr)
2031{
2032 return nla_parse_deprecated(tb, IFLA_MAX, head, len, ifla_policy,
2033 exterr);
2034}
2035EXPORT_SYMBOL(rtnl_nla_parse_ifla);
2036
2037struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
2038{
2039 struct net *net;
2040 /* Examine the link attributes and figure out which
2041 * network namespace we are talking about.
2042 */
2043 if (tb[IFLA_NET_NS_PID])
2044 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
2045 else if (tb[IFLA_NET_NS_FD])
2046 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
2047 else
2048 net = get_net(src_net);
2049 return net;
2050}
2051EXPORT_SYMBOL(rtnl_link_get_net);
2052
2053/* Figure out which network namespace we are talking about by
2054 * examining the link attributes in the following order:
2055 *
2056 * 1. IFLA_NET_NS_PID
2057 * 2. IFLA_NET_NS_FD
2058 * 3. IFLA_TARGET_NETNSID
2059 */
2060static struct net *rtnl_link_get_net_by_nlattr(struct net *src_net,
2061 struct nlattr *tb[])
2062{
2063 struct net *net;
2064
2065 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD])
2066 return rtnl_link_get_net(src_net, tb);
2067
2068 if (!tb[IFLA_TARGET_NETNSID])
2069 return get_net(src_net);
2070
2071 net = get_net_ns_by_id(src_net, nla_get_u32(tb[IFLA_TARGET_NETNSID]));
2072 if (!net)
2073 return ERR_PTR(-EINVAL);
2074
2075 return net;
2076}
2077
2078static struct net *rtnl_link_get_net_capable(const struct sk_buff *skb,
2079 struct net *src_net,
2080 struct nlattr *tb[], int cap)
2081{
2082 struct net *net;
2083
2084 net = rtnl_link_get_net_by_nlattr(src_net, tb);
2085 if (IS_ERR(net))
2086 return net;
2087
2088 if (!netlink_ns_capable(skb, net->user_ns, cap)) {
2089 put_net(net);
2090 return ERR_PTR(-EPERM);
2091 }
2092
2093 return net;
2094}
2095
2096/* Verify that rtnetlink requests do not pass additional properties
2097 * potentially referring to different network namespaces.
2098 */
2099static int rtnl_ensure_unique_netns(struct nlattr *tb[],
2100 struct netlink_ext_ack *extack,
2101 bool netns_id_only)
2102{
2103
2104 if (netns_id_only) {
2105 if (!tb[IFLA_NET_NS_PID] && !tb[IFLA_NET_NS_FD])
2106 return 0;
2107
2108 NL_SET_ERR_MSG(extack, "specified netns attribute not supported");
2109 return -EOPNOTSUPP;
2110 }
2111
2112 if (tb[IFLA_TARGET_NETNSID] && (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]))
2113 goto invalid_attr;
2114
2115 if (tb[IFLA_NET_NS_PID] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_FD]))
2116 goto invalid_attr;
2117
2118 if (tb[IFLA_NET_NS_FD] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_PID]))
2119 goto invalid_attr;
2120
2121 return 0;
2122
2123invalid_attr:
2124 NL_SET_ERR_MSG(extack, "multiple netns identifying attributes specified");
2125 return -EINVAL;
2126}
2127
2128static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
2129{
2130 if (dev) {
2131 if (tb[IFLA_ADDRESS] &&
2132 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
2133 return -EINVAL;
2134
2135 if (tb[IFLA_BROADCAST] &&
2136 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
2137 return -EINVAL;
2138 }
2139
2140 if (tb[IFLA_AF_SPEC]) {
2141 struct nlattr *af;
2142 int rem, err;
2143
2144 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2145 const struct rtnl_af_ops *af_ops;
2146
2147 rcu_read_lock();
2148 af_ops = rtnl_af_lookup(nla_type(af));
2149 if (!af_ops) {
2150 rcu_read_unlock();
2151 return -EAFNOSUPPORT;
2152 }
2153
2154 if (!af_ops->set_link_af) {
2155 rcu_read_unlock();
2156 return -EOPNOTSUPP;
2157 }
2158
2159 if (af_ops->validate_link_af) {
2160 err = af_ops->validate_link_af(dev, af);
2161 if (err < 0) {
2162 rcu_read_unlock();
2163 return err;
2164 }
2165 }
2166
2167 rcu_read_unlock();
2168 }
2169 }
2170
2171 return 0;
2172}
2173
2174static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
2175 int guid_type)
2176{
2177 const struct net_device_ops *ops = dev->netdev_ops;
2178
2179 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
2180}
2181
2182static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
2183{
2184 if (dev->type != ARPHRD_INFINIBAND)
2185 return -EOPNOTSUPP;
2186
2187 return handle_infiniband_guid(dev, ivt, guid_type);
2188}
2189
2190static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
2191{
2192 const struct net_device_ops *ops = dev->netdev_ops;
2193 int err = -EINVAL;
2194
2195 if (tb[IFLA_VF_MAC]) {
2196 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
2197
2198 if (ivm->vf >= INT_MAX)
2199 return -EINVAL;
2200 err = -EOPNOTSUPP;
2201 if (ops->ndo_set_vf_mac)
2202 err = ops->ndo_set_vf_mac(dev, ivm->vf,
2203 ivm->mac);
2204 if (err < 0)
2205 return err;
2206 }
2207
2208 if (tb[IFLA_VF_VLAN]) {
2209 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
2210
2211 if (ivv->vf >= INT_MAX)
2212 return -EINVAL;
2213 err = -EOPNOTSUPP;
2214 if (ops->ndo_set_vf_vlan)
2215 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
2216 ivv->qos,
2217 htons(ETH_P_8021Q));
2218 if (err < 0)
2219 return err;
2220 }
2221
2222 if (tb[IFLA_VF_VLAN_LIST]) {
2223 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
2224 struct nlattr *attr;
2225 int rem, len = 0;
2226
2227 err = -EOPNOTSUPP;
2228 if (!ops->ndo_set_vf_vlan)
2229 return err;
2230
2231 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
2232 if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
2233 nla_len(attr) < NLA_HDRLEN) {
2234 return -EINVAL;
2235 }
2236 if (len >= MAX_VLAN_LIST_LEN)
2237 return -EOPNOTSUPP;
2238 ivvl[len] = nla_data(attr);
2239
2240 len++;
2241 }
2242 if (len == 0)
2243 return -EINVAL;
2244
2245 if (ivvl[0]->vf >= INT_MAX)
2246 return -EINVAL;
2247 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
2248 ivvl[0]->qos, ivvl[0]->vlan_proto);
2249 if (err < 0)
2250 return err;
2251 }
2252
2253 if (tb[IFLA_VF_TX_RATE]) {
2254 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
2255 struct ifla_vf_info ivf;
2256
2257 if (ivt->vf >= INT_MAX)
2258 return -EINVAL;
2259 err = -EOPNOTSUPP;
2260 if (ops->ndo_get_vf_config)
2261 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
2262 if (err < 0)
2263 return err;
2264
2265 err = -EOPNOTSUPP;
2266 if (ops->ndo_set_vf_rate)
2267 err = ops->ndo_set_vf_rate(dev, ivt->vf,
2268 ivf.min_tx_rate,
2269 ivt->rate);
2270 if (err < 0)
2271 return err;
2272 }
2273
2274 if (tb[IFLA_VF_RATE]) {
2275 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
2276
2277 if (ivt->vf >= INT_MAX)
2278 return -EINVAL;
2279 err = -EOPNOTSUPP;
2280 if (ops->ndo_set_vf_rate)
2281 err = ops->ndo_set_vf_rate(dev, ivt->vf,
2282 ivt->min_tx_rate,
2283 ivt->max_tx_rate);
2284 if (err < 0)
2285 return err;
2286 }
2287
2288 if (tb[IFLA_VF_SPOOFCHK]) {
2289 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
2290
2291 if (ivs->vf >= INT_MAX)
2292 return -EINVAL;
2293 err = -EOPNOTSUPP;
2294 if (ops->ndo_set_vf_spoofchk)
2295 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
2296 ivs->setting);
2297 if (err < 0)
2298 return err;
2299 }
2300
2301 if (tb[IFLA_VF_LINK_STATE]) {
2302 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
2303
2304 if (ivl->vf >= INT_MAX)
2305 return -EINVAL;
2306 err = -EOPNOTSUPP;
2307 if (ops->ndo_set_vf_link_state)
2308 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
2309 ivl->link_state);
2310 if (err < 0)
2311 return err;
2312 }
2313
2314 if (tb[IFLA_VF_RSS_QUERY_EN]) {
2315 struct ifla_vf_rss_query_en *ivrssq_en;
2316
2317 err = -EOPNOTSUPP;
2318 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
2319 if (ivrssq_en->vf >= INT_MAX)
2320 return -EINVAL;
2321 if (ops->ndo_set_vf_rss_query_en)
2322 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
2323 ivrssq_en->setting);
2324 if (err < 0)
2325 return err;
2326 }
2327
2328 if (tb[IFLA_VF_TRUST]) {
2329 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
2330
2331 if (ivt->vf >= INT_MAX)
2332 return -EINVAL;
2333 err = -EOPNOTSUPP;
2334 if (ops->ndo_set_vf_trust)
2335 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
2336 if (err < 0)
2337 return err;
2338 }
2339
2340 if (tb[IFLA_VF_IB_NODE_GUID]) {
2341 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
2342
2343 if (ivt->vf >= INT_MAX)
2344 return -EINVAL;
2345 if (!ops->ndo_set_vf_guid)
2346 return -EOPNOTSUPP;
2347 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
2348 }
2349
2350 if (tb[IFLA_VF_IB_PORT_GUID]) {
2351 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
2352
2353 if (ivt->vf >= INT_MAX)
2354 return -EINVAL;
2355 if (!ops->ndo_set_vf_guid)
2356 return -EOPNOTSUPP;
2357
2358 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
2359 }
2360
2361 return err;
2362}
2363
2364static int do_set_master(struct net_device *dev, int ifindex,
2365 struct netlink_ext_ack *extack)
2366{
2367 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
2368 const struct net_device_ops *ops;
2369 int err;
2370
2371 if (upper_dev) {
2372 if (upper_dev->ifindex == ifindex)
2373 return 0;
2374 ops = upper_dev->netdev_ops;
2375 if (ops->ndo_del_slave) {
2376 err = ops->ndo_del_slave(upper_dev, dev);
2377 if (err)
2378 return err;
2379 netdev_update_lockdep_key(dev);
2380 } else {
2381 return -EOPNOTSUPP;
2382 }
2383 }
2384
2385 if (ifindex) {
2386 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
2387 if (!upper_dev)
2388 return -EINVAL;
2389 ops = upper_dev->netdev_ops;
2390 if (ops->ndo_add_slave) {
2391 err = ops->ndo_add_slave(upper_dev, dev, extack);
2392 if (err)
2393 return err;
2394 } else {
2395 return -EOPNOTSUPP;
2396 }
2397 }
2398 return 0;
2399}
2400
2401#define DO_SETLINK_MODIFIED 0x01
2402/* notify flag means notify + modified. */
2403#define DO_SETLINK_NOTIFY 0x03
2404static int do_setlink(const struct sk_buff *skb,
2405 struct net_device *dev, struct ifinfomsg *ifm,
2406 struct netlink_ext_ack *extack,
2407 struct nlattr **tb, char *ifname, int status)
2408{
2409 const struct net_device_ops *ops = dev->netdev_ops;
2410 int err;
2411
2412 err = validate_linkmsg(dev, tb);
2413 if (err < 0)
2414 return err;
2415
2416 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD] || tb[IFLA_TARGET_NETNSID]) {
2417 struct net *net = rtnl_link_get_net_capable(skb, dev_net(dev),
2418 tb, CAP_NET_ADMIN);
2419 if (IS_ERR(net)) {
2420 err = PTR_ERR(net);
2421 goto errout;
2422 }
2423
2424 err = dev_change_net_namespace(dev, net, ifname);
2425 put_net(net);
2426 if (err)
2427 goto errout;
2428 status |= DO_SETLINK_MODIFIED;
2429 }
2430
2431 if (tb[IFLA_MAP]) {
2432 struct rtnl_link_ifmap *u_map;
2433 struct ifmap k_map;
2434
2435 if (!ops->ndo_set_config) {
2436 err = -EOPNOTSUPP;
2437 goto errout;
2438 }
2439
2440 if (!netif_device_present(dev)) {
2441 err = -ENODEV;
2442 goto errout;
2443 }
2444
2445 u_map = nla_data(tb[IFLA_MAP]);
2446 k_map.mem_start = (unsigned long) u_map->mem_start;
2447 k_map.mem_end = (unsigned long) u_map->mem_end;
2448 k_map.base_addr = (unsigned short) u_map->base_addr;
2449 k_map.irq = (unsigned char) u_map->irq;
2450 k_map.dma = (unsigned char) u_map->dma;
2451 k_map.port = (unsigned char) u_map->port;
2452
2453 err = ops->ndo_set_config(dev, &k_map);
2454 if (err < 0)
2455 goto errout;
2456
2457 status |= DO_SETLINK_NOTIFY;
2458 }
2459
2460 if (tb[IFLA_ADDRESS]) {
2461 struct sockaddr *sa;
2462 int len;
2463
2464 len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len,
2465 sizeof(*sa));
2466 sa = kmalloc(len, GFP_KERNEL);
2467 if (!sa) {
2468 err = -ENOMEM;
2469 goto errout;
2470 }
2471 sa->sa_family = dev->type;
2472 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
2473 dev->addr_len);
2474 err = dev_set_mac_address(dev, sa, extack);
2475 kfree(sa);
2476 if (err)
2477 goto errout;
2478 status |= DO_SETLINK_MODIFIED;
2479 }
2480
2481 if (tb[IFLA_MTU]) {
2482 err = dev_set_mtu_ext(dev, nla_get_u32(tb[IFLA_MTU]), extack);
2483 if (err < 0)
2484 goto errout;
2485 status |= DO_SETLINK_MODIFIED;
2486 }
2487
2488 if (tb[IFLA_GROUP]) {
2489 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2490 status |= DO_SETLINK_NOTIFY;
2491 }
2492
2493 /*
2494 * Interface selected by interface index but interface
2495 * name provided implies that a name change has been
2496 * requested.
2497 */
2498 if (ifm->ifi_index > 0 && ifname[0]) {
2499 err = dev_change_name(dev, ifname);
2500 if (err < 0)
2501 goto errout;
2502 status |= DO_SETLINK_MODIFIED;
2503 }
2504
2505 if (tb[IFLA_IFALIAS]) {
2506 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2507 nla_len(tb[IFLA_IFALIAS]));
2508 if (err < 0)
2509 goto errout;
2510 status |= DO_SETLINK_NOTIFY;
2511 }
2512
2513 if (tb[IFLA_BROADCAST]) {
2514 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
2515 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
2516 }
2517
2518 if (ifm->ifi_flags || ifm->ifi_change) {
2519 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
2520 extack);
2521 if (err < 0)
2522 goto errout;
2523 }
2524
2525 if (tb[IFLA_MASTER]) {
2526 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
2527 if (err)
2528 goto errout;
2529 status |= DO_SETLINK_MODIFIED;
2530 }
2531
2532 if (tb[IFLA_CARRIER]) {
2533 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2534 if (err)
2535 goto errout;
2536 status |= DO_SETLINK_MODIFIED;
2537 }
2538
2539 if (tb[IFLA_TXQLEN]) {
2540 unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]);
2541
2542 err = dev_change_tx_queue_len(dev, value);
2543 if (err)
2544 goto errout;
2545 status |= DO_SETLINK_MODIFIED;
2546 }
2547
2548 if (tb[IFLA_GSO_MAX_SIZE]) {
2549 u32 max_size = nla_get_u32(tb[IFLA_GSO_MAX_SIZE]);
2550
2551 if (max_size > GSO_MAX_SIZE) {
2552 err = -EINVAL;
2553 goto errout;
2554 }
2555
2556 if (dev->gso_max_size ^ max_size) {
2557 netif_set_gso_max_size(dev, max_size);
2558 status |= DO_SETLINK_MODIFIED;
2559 }
2560 }
2561
2562 if (tb[IFLA_GSO_MAX_SEGS]) {
2563 u32 max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
2564
2565 if (max_segs > GSO_MAX_SEGS) {
2566 err = -EINVAL;
2567 goto errout;
2568 }
2569
2570 if (dev->gso_max_segs ^ max_segs) {
2571 dev->gso_max_segs = max_segs;
2572 status |= DO_SETLINK_MODIFIED;
2573 }
2574 }
2575
2576 if (tb[IFLA_OPERSTATE])
2577 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2578
2579 if (tb[IFLA_LINKMODE]) {
2580 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2581
2582 write_lock_bh(&dev_base_lock);
2583 if (dev->link_mode ^ value)
2584 status |= DO_SETLINK_NOTIFY;
2585 dev->link_mode = value;
2586 write_unlock_bh(&dev_base_lock);
2587 }
2588
2589 if (tb[IFLA_VFINFO_LIST]) {
2590 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
2591 struct nlattr *attr;
2592 int rem;
2593
2594 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
2595 if (nla_type(attr) != IFLA_VF_INFO ||
2596 nla_len(attr) < NLA_HDRLEN) {
2597 err = -EINVAL;
2598 goto errout;
2599 }
2600 err = nla_parse_nested_deprecated(vfinfo, IFLA_VF_MAX,
2601 attr,
2602 ifla_vf_policy,
2603 NULL);
2604 if (err < 0)
2605 goto errout;
2606 err = do_setvfinfo(dev, vfinfo);
2607 if (err < 0)
2608 goto errout;
2609 status |= DO_SETLINK_NOTIFY;
2610 }
2611 }
2612 err = 0;
2613
2614 if (tb[IFLA_VF_PORTS]) {
2615 struct nlattr *port[IFLA_PORT_MAX+1];
2616 struct nlattr *attr;
2617 int vf;
2618 int rem;
2619
2620 err = -EOPNOTSUPP;
2621 if (!ops->ndo_set_vf_port)
2622 goto errout;
2623
2624 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
2625 if (nla_type(attr) != IFLA_VF_PORT ||
2626 nla_len(attr) < NLA_HDRLEN) {
2627 err = -EINVAL;
2628 goto errout;
2629 }
2630 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
2631 attr,
2632 ifla_port_policy,
2633 NULL);
2634 if (err < 0)
2635 goto errout;
2636 if (!port[IFLA_PORT_VF]) {
2637 err = -EOPNOTSUPP;
2638 goto errout;
2639 }
2640 vf = nla_get_u32(port[IFLA_PORT_VF]);
2641 err = ops->ndo_set_vf_port(dev, vf, port);
2642 if (err < 0)
2643 goto errout;
2644 status |= DO_SETLINK_NOTIFY;
2645 }
2646 }
2647 err = 0;
2648
2649 if (tb[IFLA_PORT_SELF]) {
2650 struct nlattr *port[IFLA_PORT_MAX+1];
2651
2652 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
2653 tb[IFLA_PORT_SELF],
2654 ifla_port_policy, NULL);
2655 if (err < 0)
2656 goto errout;
2657
2658 err = -EOPNOTSUPP;
2659 if (ops->ndo_set_vf_port)
2660 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2661 if (err < 0)
2662 goto errout;
2663 status |= DO_SETLINK_NOTIFY;
2664 }
2665
2666 if (tb[IFLA_AF_SPEC]) {
2667 struct nlattr *af;
2668 int rem;
2669
2670 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2671 const struct rtnl_af_ops *af_ops;
2672
2673 rcu_read_lock();
2674
2675 BUG_ON(!(af_ops = rtnl_af_lookup(nla_type(af))));
2676
2677 err = af_ops->set_link_af(dev, af);
2678 if (err < 0) {
2679 rcu_read_unlock();
2680 goto errout;
2681 }
2682
2683 rcu_read_unlock();
2684 status |= DO_SETLINK_NOTIFY;
2685 }
2686 }
2687 err = 0;
2688
2689 if (tb[IFLA_PROTO_DOWN]) {
2690 err = dev_change_proto_down(dev,
2691 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2692 if (err)
2693 goto errout;
2694 status |= DO_SETLINK_NOTIFY;
2695 }
2696
2697 if (tb[IFLA_XDP]) {
2698 struct nlattr *xdp[IFLA_XDP_MAX + 1];
2699 u32 xdp_flags = 0;
2700
2701 err = nla_parse_nested_deprecated(xdp, IFLA_XDP_MAX,
2702 tb[IFLA_XDP],
2703 ifla_xdp_policy, NULL);
2704 if (err < 0)
2705 goto errout;
2706
2707 if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) {
2708 err = -EINVAL;
2709 goto errout;
2710 }
2711
2712 if (xdp[IFLA_XDP_FLAGS]) {
2713 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
2714 if (xdp_flags & ~XDP_FLAGS_MASK) {
2715 err = -EINVAL;
2716 goto errout;
2717 }
2718 if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) {
2719 err = -EINVAL;
2720 goto errout;
2721 }
2722 }
2723
2724 if (xdp[IFLA_XDP_FD]) {
2725 err = dev_change_xdp_fd(dev, extack,
2726 nla_get_s32(xdp[IFLA_XDP_FD]),
2727 xdp_flags);
2728 if (err)
2729 goto errout;
2730 status |= DO_SETLINK_NOTIFY;
2731 }
2732 }
2733
2734errout:
2735 if (status & DO_SETLINK_MODIFIED) {
2736 if ((status & DO_SETLINK_NOTIFY) == DO_SETLINK_NOTIFY)
2737 netdev_state_change(dev);
2738
2739 if (err < 0)
2740 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",
2741 dev->name);
2742 }
2743
2744 return err;
2745}
2746
2747static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2748 struct netlink_ext_ack *extack)
2749{
2750 struct net *net = sock_net(skb->sk);
2751 struct ifinfomsg *ifm;
2752 struct net_device *dev;
2753 int err;
2754 struct nlattr *tb[IFLA_MAX+1];
2755 char ifname[IFNAMSIZ];
2756
2757 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
2758 ifla_policy, extack);
2759 if (err < 0)
2760 goto errout;
2761
2762 err = rtnl_ensure_unique_netns(tb, extack, false);
2763 if (err < 0)
2764 goto errout;
2765
2766 if (tb[IFLA_IFNAME])
2767 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2768 else
2769 ifname[0] = '\0';
2770
2771 err = -EINVAL;
2772 ifm = nlmsg_data(nlh);
2773 if (ifm->ifi_index > 0)
2774 dev = __dev_get_by_index(net, ifm->ifi_index);
2775 else if (tb[IFLA_IFNAME])
2776 dev = __dev_get_by_name(net, ifname);
2777 else
2778 goto errout;
2779
2780 if (dev == NULL) {
2781 err = -ENODEV;
2782 goto errout;
2783 }
2784
2785 err = do_setlink(skb, dev, ifm, extack, tb, ifname, 0);
2786errout:
2787 return err;
2788}
2789
2790static int rtnl_group_dellink(const struct net *net, int group)
2791{
2792 struct net_device *dev, *aux;
2793 LIST_HEAD(list_kill);
2794 bool found = false;
2795
2796 if (!group)
2797 return -EPERM;
2798
2799 for_each_netdev(net, dev) {
2800 if (dev->group == group) {
2801 const struct rtnl_link_ops *ops;
2802
2803 found = true;
2804 ops = dev->rtnl_link_ops;
2805 if (!ops || !ops->dellink)
2806 return -EOPNOTSUPP;
2807 }
2808 }
2809
2810 if (!found)
2811 return -ENODEV;
2812
2813 for_each_netdev_safe(net, dev, aux) {
2814 if (dev->group == group) {
2815 const struct rtnl_link_ops *ops;
2816
2817 ops = dev->rtnl_link_ops;
2818 ops->dellink(dev, &list_kill);
2819 }
2820 }
2821 unregister_netdevice_many(&list_kill);
2822
2823 return 0;
2824}
2825
2826int rtnl_delete_link(struct net_device *dev)
2827{
2828 const struct rtnl_link_ops *ops;
2829 LIST_HEAD(list_kill);
2830
2831 ops = dev->rtnl_link_ops;
2832 if (!ops || !ops->dellink)
2833 return -EOPNOTSUPP;
2834
2835 ops->dellink(dev, &list_kill);
2836 unregister_netdevice_many(&list_kill);
2837
2838 return 0;
2839}
2840EXPORT_SYMBOL_GPL(rtnl_delete_link);
2841
2842static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
2843 struct netlink_ext_ack *extack)
2844{
2845 struct net *net = sock_net(skb->sk);
2846 struct net *tgt_net = net;
2847 struct net_device *dev = NULL;
2848 struct ifinfomsg *ifm;
2849 char ifname[IFNAMSIZ];
2850 struct nlattr *tb[IFLA_MAX+1];
2851 int err;
2852 int netnsid = -1;
2853
2854 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
2855 ifla_policy, extack);
2856 if (err < 0)
2857 return err;
2858
2859 err = rtnl_ensure_unique_netns(tb, extack, true);
2860 if (err < 0)
2861 return err;
2862
2863 if (tb[IFLA_IFNAME])
2864 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2865
2866 if (tb[IFLA_TARGET_NETNSID]) {
2867 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
2868 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
2869 if (IS_ERR(tgt_net))
2870 return PTR_ERR(tgt_net);
2871 }
2872
2873 err = -EINVAL;
2874 ifm = nlmsg_data(nlh);
2875 if (ifm->ifi_index > 0)
2876 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
2877 else if (tb[IFLA_IFNAME])
2878 dev = __dev_get_by_name(tgt_net, ifname);
2879 else if (tb[IFLA_GROUP])
2880 err = rtnl_group_dellink(tgt_net, nla_get_u32(tb[IFLA_GROUP]));
2881 else
2882 goto out;
2883
2884 if (!dev) {
2885 if (tb[IFLA_IFNAME] || ifm->ifi_index > 0)
2886 err = -ENODEV;
2887
2888 goto out;
2889 }
2890
2891 err = rtnl_delete_link(dev);
2892
2893out:
2894 if (netnsid >= 0)
2895 put_net(tgt_net);
2896
2897 return err;
2898}
2899
2900int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2901{
2902 unsigned int old_flags;
2903 int err;
2904
2905 old_flags = dev->flags;
2906 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2907 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
2908 NULL);
2909 if (err < 0)
2910 return err;
2911 }
2912
2913 if (dev->rtnl_link_state == RTNL_LINK_INITIALIZED) {
2914 __dev_notify_flags(dev, old_flags, (old_flags ^ dev->flags));
2915 } else {
2916 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
2917 __dev_notify_flags(dev, old_flags, ~0U);
2918 }
2919 return 0;
2920}
2921EXPORT_SYMBOL(rtnl_configure_link);
2922
2923struct net_device *rtnl_create_link(struct net *net, const char *ifname,
2924 unsigned char name_assign_type,
2925 const struct rtnl_link_ops *ops,
2926 struct nlattr *tb[],
2927 struct netlink_ext_ack *extack)
2928{
2929 struct net_device *dev;
2930 unsigned int num_tx_queues = 1;
2931 unsigned int num_rx_queues = 1;
2932
2933 if (tb[IFLA_NUM_TX_QUEUES])
2934 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2935 else if (ops->get_num_tx_queues)
2936 num_tx_queues = ops->get_num_tx_queues();
2937
2938 if (tb[IFLA_NUM_RX_QUEUES])
2939 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2940 else if (ops->get_num_rx_queues)
2941 num_rx_queues = ops->get_num_rx_queues();
2942
2943 if (num_tx_queues < 1 || num_tx_queues > 4096) {
2944 NL_SET_ERR_MSG(extack, "Invalid number of transmit queues");
2945 return ERR_PTR(-EINVAL);
2946 }
2947
2948 if (num_rx_queues < 1 || num_rx_queues > 4096) {
2949 NL_SET_ERR_MSG(extack, "Invalid number of receive queues");
2950 return ERR_PTR(-EINVAL);
2951 }
2952
2953 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
2954 ops->setup, num_tx_queues, num_rx_queues);
2955 if (!dev)
2956 return ERR_PTR(-ENOMEM);
2957
2958 dev_net_set(dev, net);
2959 dev->rtnl_link_ops = ops;
2960 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
2961
2962 if (tb[IFLA_MTU])
2963 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2964 if (tb[IFLA_ADDRESS]) {
2965 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2966 nla_len(tb[IFLA_ADDRESS]));
2967 dev->addr_assign_type = NET_ADDR_SET;
2968 }
2969 if (tb[IFLA_BROADCAST])
2970 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2971 nla_len(tb[IFLA_BROADCAST]));
2972 if (tb[IFLA_TXQLEN])
2973 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2974 if (tb[IFLA_OPERSTATE])
2975 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2976 if (tb[IFLA_LINKMODE])
2977 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
2978 if (tb[IFLA_GROUP])
2979 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2980 if (tb[IFLA_GSO_MAX_SIZE])
2981 netif_set_gso_max_size(dev, nla_get_u32(tb[IFLA_GSO_MAX_SIZE]));
2982 if (tb[IFLA_GSO_MAX_SEGS])
2983 dev->gso_max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
2984
2985 return dev;
2986}
2987EXPORT_SYMBOL(rtnl_create_link);
2988
2989static int rtnl_group_changelink(const struct sk_buff *skb,
2990 struct net *net, int group,
2991 struct ifinfomsg *ifm,
2992 struct netlink_ext_ack *extack,
2993 struct nlattr **tb)
2994{
2995 struct net_device *dev, *aux;
2996 int err;
2997
2998 for_each_netdev_safe(net, dev, aux) {
2999 if (dev->group == group) {
3000 err = do_setlink(skb, dev, ifm, extack, tb, NULL, 0);
3001 if (err < 0)
3002 return err;
3003 }
3004 }
3005
3006 return 0;
3007}
3008
3009static int __rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3010 struct nlattr **attr, struct netlink_ext_ack *extack)
3011{
3012 struct nlattr *slave_attr[RTNL_SLAVE_MAX_TYPE + 1];
3013 unsigned char name_assign_type = NET_NAME_USER;
3014 struct nlattr *linkinfo[IFLA_INFO_MAX + 1];
3015 const struct rtnl_link_ops *m_ops = NULL;
3016 struct net_device *master_dev = NULL;
3017 struct net *net = sock_net(skb->sk);
3018 const struct rtnl_link_ops *ops;
3019 struct nlattr *tb[IFLA_MAX + 1];
3020 struct net *dest_net, *link_net;
3021 struct nlattr **slave_data;
3022 char kind[MODULE_NAME_LEN];
3023 struct net_device *dev;
3024 struct ifinfomsg *ifm;
3025 char ifname[IFNAMSIZ];
3026 struct nlattr **data;
3027 int err;
3028
3029#ifdef CONFIG_MODULES
3030replay:
3031#endif
3032 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3033 ifla_policy, extack);
3034 if (err < 0)
3035 return err;
3036
3037 err = rtnl_ensure_unique_netns(tb, extack, false);
3038 if (err < 0)
3039 return err;
3040
3041 if (tb[IFLA_IFNAME])
3042 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3043 else
3044 ifname[0] = '\0';
3045
3046 ifm = nlmsg_data(nlh);
3047 if (ifm->ifi_index > 0)
3048 dev = __dev_get_by_index(net, ifm->ifi_index);
3049 else {
3050 if (ifname[0])
3051 dev = __dev_get_by_name(net, ifname);
3052 else
3053 dev = NULL;
3054 }
3055
3056 if (dev) {
3057 master_dev = netdev_master_upper_dev_get(dev);
3058 if (master_dev)
3059 m_ops = master_dev->rtnl_link_ops;
3060 }
3061
3062 err = validate_linkmsg(dev, tb);
3063 if (err < 0)
3064 return err;
3065
3066 if (tb[IFLA_LINKINFO]) {
3067 err = nla_parse_nested_deprecated(linkinfo, IFLA_INFO_MAX,
3068 tb[IFLA_LINKINFO],
3069 ifla_info_policy, NULL);
3070 if (err < 0)
3071 return err;
3072 } else
3073 memset(linkinfo, 0, sizeof(linkinfo));
3074
3075 if (linkinfo[IFLA_INFO_KIND]) {
3076 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
3077 ops = rtnl_link_ops_get(kind);
3078 } else {
3079 kind[0] = '\0';
3080 ops = NULL;
3081 }
3082
3083 data = NULL;
3084 if (ops) {
3085 if (ops->maxtype > RTNL_MAX_TYPE)
3086 return -EINVAL;
3087
3088 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
3089 err = nla_parse_nested_deprecated(attr, ops->maxtype,
3090 linkinfo[IFLA_INFO_DATA],
3091 ops->policy, extack);
3092 if (err < 0)
3093 return err;
3094 data = attr;
3095 }
3096 if (ops->validate) {
3097 err = ops->validate(tb, data, extack);
3098 if (err < 0)
3099 return err;
3100 }
3101 }
3102
3103 slave_data = NULL;
3104 if (m_ops) {
3105 if (m_ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE)
3106 return -EINVAL;
3107
3108 if (m_ops->slave_maxtype &&
3109 linkinfo[IFLA_INFO_SLAVE_DATA]) {
3110 err = nla_parse_nested_deprecated(slave_attr,
3111 m_ops->slave_maxtype,
3112 linkinfo[IFLA_INFO_SLAVE_DATA],
3113 m_ops->slave_policy,
3114 extack);
3115 if (err < 0)
3116 return err;
3117 slave_data = slave_attr;
3118 }
3119 }
3120
3121 if (dev) {
3122 int status = 0;
3123
3124 if (nlh->nlmsg_flags & NLM_F_EXCL)
3125 return -EEXIST;
3126 if (nlh->nlmsg_flags & NLM_F_REPLACE)
3127 return -EOPNOTSUPP;
3128
3129 if (linkinfo[IFLA_INFO_DATA]) {
3130 if (!ops || ops != dev->rtnl_link_ops ||
3131 !ops->changelink)
3132 return -EOPNOTSUPP;
3133
3134 err = ops->changelink(dev, tb, data, extack);
3135 if (err < 0)
3136 return err;
3137 status |= DO_SETLINK_NOTIFY;
3138 }
3139
3140 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
3141 if (!m_ops || !m_ops->slave_changelink)
3142 return -EOPNOTSUPP;
3143
3144 err = m_ops->slave_changelink(master_dev, dev, tb,
3145 slave_data, extack);
3146 if (err < 0)
3147 return err;
3148 status |= DO_SETLINK_NOTIFY;
3149 }
3150
3151 return do_setlink(skb, dev, ifm, extack, tb, ifname, status);
3152 }
3153
3154 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
3155 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
3156 return rtnl_group_changelink(skb, net,
3157 nla_get_u32(tb[IFLA_GROUP]),
3158 ifm, extack, tb);
3159 return -ENODEV;
3160 }
3161
3162 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
3163 return -EOPNOTSUPP;
3164
3165 if (!ops) {
3166#ifdef CONFIG_MODULES
3167 if (kind[0]) {
3168 __rtnl_unlock();
3169 request_module("rtnl-link-%s", kind);
3170 rtnl_lock();
3171 ops = rtnl_link_ops_get(kind);
3172 if (ops)
3173 goto replay;
3174 }
3175#endif
3176 NL_SET_ERR_MSG(extack, "Unknown device type");
3177 return -EOPNOTSUPP;
3178 }
3179
3180 if (!ops->setup)
3181 return -EOPNOTSUPP;
3182
3183 if (!ifname[0]) {
3184 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
3185 name_assign_type = NET_NAME_ENUM;
3186 }
3187
3188 dest_net = rtnl_link_get_net_capable(skb, net, tb, CAP_NET_ADMIN);
3189 if (IS_ERR(dest_net))
3190 return PTR_ERR(dest_net);
3191
3192 if (tb[IFLA_LINK_NETNSID]) {
3193 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
3194
3195 link_net = get_net_ns_by_id(dest_net, id);
3196 if (!link_net) {
3197 NL_SET_ERR_MSG(extack, "Unknown network namespace id");
3198 err = -EINVAL;
3199 goto out;
3200 }
3201 err = -EPERM;
3202 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
3203 goto out;
3204 } else {
3205 link_net = NULL;
3206 }
3207
3208 dev = rtnl_create_link(link_net ? : dest_net, ifname,
3209 name_assign_type, ops, tb, extack);
3210 if (IS_ERR(dev)) {
3211 err = PTR_ERR(dev);
3212 goto out;
3213 }
3214
3215 dev->ifindex = ifm->ifi_index;
3216
3217 if (ops->newlink) {
3218 err = ops->newlink(link_net ? : net, dev, tb, data, extack);
3219 /* Drivers should call free_netdev() in ->destructor
3220 * and unregister it on failure after registration
3221 * so that device could be finally freed in rtnl_unlock.
3222 */
3223 if (err < 0) {
3224 /* If device is not registered at all, free it now */
3225 if (dev->reg_state == NETREG_UNINITIALIZED)
3226 free_netdev(dev);
3227 goto out;
3228 }
3229 } else {
3230 err = register_netdevice(dev);
3231 if (err < 0) {
3232 free_netdev(dev);
3233 goto out;
3234 }
3235 }
3236 err = rtnl_configure_link(dev, ifm);
3237 if (err < 0)
3238 goto out_unregister;
3239 if (link_net) {
3240 err = dev_change_net_namespace(dev, dest_net, ifname);
3241 if (err < 0)
3242 goto out_unregister;
3243 }
3244 if (tb[IFLA_MASTER]) {
3245 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
3246 if (err)
3247 goto out_unregister;
3248 }
3249out:
3250 if (link_net)
3251 put_net(link_net);
3252 put_net(dest_net);
3253 return err;
3254out_unregister:
3255 if (ops->newlink) {
3256 LIST_HEAD(list_kill);
3257
3258 ops->dellink(dev, &list_kill);
3259 unregister_netdevice_many(&list_kill);
3260 } else {
3261 unregister_netdevice(dev);
3262 }
3263 goto out;
3264}
3265
3266static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3267 struct netlink_ext_ack *extack)
3268{
3269 struct nlattr **attr;
3270 int ret;
3271
3272 attr = kmalloc_array(RTNL_MAX_TYPE + 1, sizeof(*attr), GFP_KERNEL);
3273 if (!attr)
3274 return -ENOMEM;
3275
3276 ret = __rtnl_newlink(skb, nlh, attr, extack);
3277 kfree(attr);
3278 return ret;
3279}
3280
3281static int rtnl_valid_getlink_req(struct sk_buff *skb,
3282 const struct nlmsghdr *nlh,
3283 struct nlattr **tb,
3284 struct netlink_ext_ack *extack)
3285{
3286 struct ifinfomsg *ifm;
3287 int i, err;
3288
3289 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
3290 NL_SET_ERR_MSG(extack, "Invalid header for get link");
3291 return -EINVAL;
3292 }
3293
3294 if (!netlink_strict_get_check(skb))
3295 return nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3296 ifla_policy, extack);
3297
3298 ifm = nlmsg_data(nlh);
3299 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
3300 ifm->ifi_change) {
3301 NL_SET_ERR_MSG(extack, "Invalid values in header for get link request");
3302 return -EINVAL;
3303 }
3304
3305 err = nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, IFLA_MAX,
3306 ifla_policy, extack);
3307 if (err)
3308 return err;
3309
3310 for (i = 0; i <= IFLA_MAX; i++) {
3311 if (!tb[i])
3312 continue;
3313
3314 switch (i) {
3315 case IFLA_IFNAME:
3316 case IFLA_EXT_MASK:
3317 case IFLA_TARGET_NETNSID:
3318 break;
3319 default:
3320 NL_SET_ERR_MSG(extack, "Unsupported attribute in get link request");
3321 return -EINVAL;
3322 }
3323 }
3324
3325 return 0;
3326}
3327
3328static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3329 struct netlink_ext_ack *extack)
3330{
3331 struct net *net = sock_net(skb->sk);
3332 struct net *tgt_net = net;
3333 struct ifinfomsg *ifm;
3334 char ifname[IFNAMSIZ];
3335 struct nlattr *tb[IFLA_MAX+1];
3336 struct net_device *dev = NULL;
3337 struct sk_buff *nskb;
3338 int netnsid = -1;
3339 int err;
3340 u32 ext_filter_mask = 0;
3341
3342 err = rtnl_valid_getlink_req(skb, nlh, tb, extack);
3343 if (err < 0)
3344 return err;
3345
3346 err = rtnl_ensure_unique_netns(tb, extack, true);
3347 if (err < 0)
3348 return err;
3349
3350 if (tb[IFLA_TARGET_NETNSID]) {
3351 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
3352 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
3353 if (IS_ERR(tgt_net))
3354 return PTR_ERR(tgt_net);
3355 }
3356
3357 if (tb[IFLA_IFNAME])
3358 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3359
3360 if (tb[IFLA_EXT_MASK])
3361 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3362
3363 err = -EINVAL;
3364 ifm = nlmsg_data(nlh);
3365 if (ifm->ifi_index > 0)
3366 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
3367 else if (tb[IFLA_IFNAME])
3368 dev = __dev_get_by_name(tgt_net, ifname);
3369 else
3370 goto out;
3371
3372 err = -ENODEV;
3373 if (dev == NULL)
3374 goto out;
3375
3376 err = -ENOBUFS;
3377 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
3378 if (nskb == NULL)
3379 goto out;
3380
3381 err = rtnl_fill_ifinfo(nskb, dev, net,
3382 RTM_NEWLINK, NETLINK_CB(skb).portid,
3383 nlh->nlmsg_seq, 0, 0, ext_filter_mask,
3384 0, NULL, 0, netnsid, GFP_KERNEL);
3385 if (err < 0) {
3386 /* -EMSGSIZE implies BUG in if_nlmsg_size */
3387 WARN_ON(err == -EMSGSIZE);
3388 kfree_skb(nskb);
3389 } else
3390 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
3391out:
3392 if (netnsid >= 0)
3393 put_net(tgt_net);
3394
3395 return err;
3396}
3397
3398static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
3399{
3400 struct net *net = sock_net(skb->sk);
3401 struct net_device *dev;
3402 struct nlattr *tb[IFLA_MAX+1];
3403 u32 ext_filter_mask = 0;
3404 u16 min_ifinfo_dump_size = 0;
3405 int hdrlen;
3406
3407 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
3408 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
3409 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
3410
3411 if (nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
3412 if (tb[IFLA_EXT_MASK])
3413 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3414 }
3415
3416 if (!ext_filter_mask)
3417 return NLMSG_GOODSIZE;
3418 /*
3419 * traverse the list of net devices and compute the minimum
3420 * buffer size based upon the filter mask.
3421 */
3422 rcu_read_lock();
3423 for_each_netdev_rcu(net, dev) {
3424 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
3425 if_nlmsg_size(dev,
3426 ext_filter_mask));
3427 }
3428 rcu_read_unlock();
3429
3430 return nlmsg_total_size(min_ifinfo_dump_size);
3431}
3432
3433static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
3434{
3435 int idx;
3436 int s_idx = cb->family;
3437 int type = cb->nlh->nlmsg_type - RTM_BASE;
3438 int ret = 0;
3439
3440 if (s_idx == 0)
3441 s_idx = 1;
3442
3443 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
3444 struct rtnl_link **tab;
3445 struct rtnl_link *link;
3446 rtnl_dumpit_func dumpit;
3447
3448 if (idx < s_idx || idx == PF_PACKET)
3449 continue;
3450
3451 if (type < 0 || type >= RTM_NR_MSGTYPES)
3452 continue;
3453
3454 tab = rcu_dereference_rtnl(rtnl_msg_handlers[idx]);
3455 if (!tab)
3456 continue;
3457
3458 link = tab[type];
3459 if (!link)
3460 continue;
3461
3462 dumpit = link->dumpit;
3463 if (!dumpit)
3464 continue;
3465
3466 if (idx > s_idx) {
3467 memset(&cb->args[0], 0, sizeof(cb->args));
3468 cb->prev_seq = 0;
3469 cb->seq = 0;
3470 }
3471 ret = dumpit(skb, cb);
3472 if (ret)
3473 break;
3474 }
3475 cb->family = idx;
3476
3477 return skb->len ? : ret;
3478}
3479
3480struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
3481 unsigned int change,
3482 u32 event, gfp_t flags, int *new_nsid,
3483 int new_ifindex)
3484{
3485 struct net *net = dev_net(dev);
3486 struct sk_buff *skb;
3487 int err = -ENOBUFS;
3488 size_t if_info_size;
3489
3490 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
3491 if (skb == NULL)
3492 goto errout;
3493
3494 err = rtnl_fill_ifinfo(skb, dev, dev_net(dev),
3495 type, 0, 0, change, 0, 0, event,
3496 new_nsid, new_ifindex, -1, flags);
3497 if (err < 0) {
3498 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
3499 WARN_ON(err == -EMSGSIZE);
3500 kfree_skb(skb);
3501 goto errout;
3502 }
3503 return skb;
3504errout:
3505 if (err < 0)
3506 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
3507 return NULL;
3508}
3509
3510void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
3511{
3512 struct net *net = dev_net(dev);
3513
3514 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
3515}
3516
3517static void rtmsg_ifinfo_event(int type, struct net_device *dev,
3518 unsigned int change, u32 event,
3519 gfp_t flags, int *new_nsid, int new_ifindex)
3520{
3521 struct sk_buff *skb;
3522
3523 if (dev->reg_state != NETREG_REGISTERED)
3524 return;
3525
3526 skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags, new_nsid,
3527 new_ifindex);
3528 if (skb)
3529 rtmsg_ifinfo_send(skb, dev, flags);
3530}
3531
3532void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
3533 gfp_t flags)
3534{
3535 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
3536 NULL, 0);
3537}
3538
3539void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change,
3540 gfp_t flags, int *new_nsid, int new_ifindex)
3541{
3542 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
3543 new_nsid, new_ifindex);
3544}
3545
3546static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
3547 struct net_device *dev,
3548 u8 *addr, u16 vid, u32 pid, u32 seq,
3549 int type, unsigned int flags,
3550 int nlflags, u16 ndm_state)
3551{
3552 struct nlmsghdr *nlh;
3553 struct ndmsg *ndm;
3554
3555 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
3556 if (!nlh)
3557 return -EMSGSIZE;
3558
3559 ndm = nlmsg_data(nlh);
3560 ndm->ndm_family = AF_BRIDGE;
3561 ndm->ndm_pad1 = 0;
3562 ndm->ndm_pad2 = 0;
3563 ndm->ndm_flags = flags;
3564 ndm->ndm_type = 0;
3565 ndm->ndm_ifindex = dev->ifindex;
3566 ndm->ndm_state = ndm_state;
3567
3568 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
3569 goto nla_put_failure;
3570 if (vid)
3571 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
3572 goto nla_put_failure;
3573
3574 nlmsg_end(skb, nlh);
3575 return 0;
3576
3577nla_put_failure:
3578 nlmsg_cancel(skb, nlh);
3579 return -EMSGSIZE;
3580}
3581
3582static inline size_t rtnl_fdb_nlmsg_size(void)
3583{
3584 return NLMSG_ALIGN(sizeof(struct ndmsg)) +
3585 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */
3586 nla_total_size(sizeof(u16)) + /* NDA_VLAN */
3587 0;
3588}
3589
3590static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
3591 u16 ndm_state)
3592{
3593 struct net *net = dev_net(dev);
3594 struct sk_buff *skb;
3595 int err = -ENOBUFS;
3596
3597 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
3598 if (!skb)
3599 goto errout;
3600
3601 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
3602 0, 0, type, NTF_SELF, 0, ndm_state);
3603 if (err < 0) {
3604 kfree_skb(skb);
3605 goto errout;
3606 }
3607
3608 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
3609 return;
3610errout:
3611 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
3612}
3613
3614/*
3615 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
3616 */
3617int ndo_dflt_fdb_add(struct ndmsg *ndm,
3618 struct nlattr *tb[],
3619 struct net_device *dev,
3620 const unsigned char *addr, u16 vid,
3621 u16 flags)
3622{
3623 int err = -EINVAL;
3624
3625 /* If aging addresses are supported device will need to
3626 * implement its own handler for this.
3627 */
3628 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
3629 pr_info("%s: FDB only supports static addresses\n", dev->name);
3630 return err;
3631 }
3632
3633 if (vid) {
3634 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
3635 return err;
3636 }
3637
3638 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3639 err = dev_uc_add_excl(dev, addr);
3640 else if (is_multicast_ether_addr(addr))
3641 err = dev_mc_add_excl(dev, addr);
3642
3643 /* Only return duplicate errors if NLM_F_EXCL is set */
3644 if (err == -EEXIST && !(flags & NLM_F_EXCL))
3645 err = 0;
3646
3647 return err;
3648}
3649EXPORT_SYMBOL(ndo_dflt_fdb_add);
3650
3651static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid,
3652 struct netlink_ext_ack *extack)
3653{
3654 u16 vid = 0;
3655
3656 if (vlan_attr) {
3657 if (nla_len(vlan_attr) != sizeof(u16)) {
3658 NL_SET_ERR_MSG(extack, "invalid vlan attribute size");
3659 return -EINVAL;
3660 }
3661
3662 vid = nla_get_u16(vlan_attr);
3663
3664 if (!vid || vid >= VLAN_VID_MASK) {
3665 NL_SET_ERR_MSG(extack, "invalid vlan id");
3666 return -EINVAL;
3667 }
3668 }
3669 *p_vid = vid;
3670 return 0;
3671}
3672
3673static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
3674 struct netlink_ext_ack *extack)
3675{
3676 struct net *net = sock_net(skb->sk);
3677 struct ndmsg *ndm;
3678 struct nlattr *tb[NDA_MAX+1];
3679 struct net_device *dev;
3680 u8 *addr;
3681 u16 vid;
3682 int err;
3683
3684 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL,
3685 extack);
3686 if (err < 0)
3687 return err;
3688
3689 ndm = nlmsg_data(nlh);
3690 if (ndm->ndm_ifindex == 0) {
3691 NL_SET_ERR_MSG(extack, "invalid ifindex");
3692 return -EINVAL;
3693 }
3694
3695 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3696 if (dev == NULL) {
3697 NL_SET_ERR_MSG(extack, "unknown ifindex");
3698 return -ENODEV;
3699 }
3700
3701 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3702 NL_SET_ERR_MSG(extack, "invalid address");
3703 return -EINVAL;
3704 }
3705
3706 if (dev->type != ARPHRD_ETHER) {
3707 NL_SET_ERR_MSG(extack, "FDB add only supported for Ethernet devices");
3708 return -EINVAL;
3709 }
3710
3711 addr = nla_data(tb[NDA_LLADDR]);
3712
3713 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
3714 if (err)
3715 return err;
3716
3717 err = -EOPNOTSUPP;
3718
3719 /* Support fdb on master device the net/bridge default case */
3720 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3721 (dev->priv_flags & IFF_BRIDGE_PORT)) {
3722 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3723 const struct net_device_ops *ops = br_dev->netdev_ops;
3724
3725 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
3726 nlh->nlmsg_flags, extack);
3727 if (err)
3728 goto out;
3729 else
3730 ndm->ndm_flags &= ~NTF_MASTER;
3731 }
3732
3733 /* Embedded bridge, macvlan, and any other device support */
3734 if ((ndm->ndm_flags & NTF_SELF)) {
3735 if (dev->netdev_ops->ndo_fdb_add)
3736 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
3737 vid,
3738 nlh->nlmsg_flags,
3739 extack);
3740 else
3741 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
3742 nlh->nlmsg_flags);
3743
3744 if (!err) {
3745 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
3746 ndm->ndm_state);
3747 ndm->ndm_flags &= ~NTF_SELF;
3748 }
3749 }
3750out:
3751 return err;
3752}
3753
3754/*
3755 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
3756 */
3757int ndo_dflt_fdb_del(struct ndmsg *ndm,
3758 struct nlattr *tb[],
3759 struct net_device *dev,
3760 const unsigned char *addr, u16 vid)
3761{
3762 int err = -EINVAL;
3763
3764 /* If aging addresses are supported device will need to
3765 * implement its own handler for this.
3766 */
3767 if (!(ndm->ndm_state & NUD_PERMANENT)) {
3768 pr_info("%s: FDB only supports static addresses\n", dev->name);
3769 return err;
3770 }
3771
3772 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3773 err = dev_uc_del(dev, addr);
3774 else if (is_multicast_ether_addr(addr))
3775 err = dev_mc_del(dev, addr);
3776
3777 return err;
3778}
3779EXPORT_SYMBOL(ndo_dflt_fdb_del);
3780
3781static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
3782 struct netlink_ext_ack *extack)
3783{
3784 struct net *net = sock_net(skb->sk);
3785 struct ndmsg *ndm;
3786 struct nlattr *tb[NDA_MAX+1];
3787 struct net_device *dev;
3788 int err = -EINVAL;
3789 __u8 *addr;
3790 u16 vid;
3791
3792 if (!netlink_capable(skb, CAP_NET_ADMIN))
3793 return -EPERM;
3794
3795 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL,
3796 extack);
3797 if (err < 0)
3798 return err;
3799
3800 ndm = nlmsg_data(nlh);
3801 if (ndm->ndm_ifindex == 0) {
3802 NL_SET_ERR_MSG(extack, "invalid ifindex");
3803 return -EINVAL;
3804 }
3805
3806 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3807 if (dev == NULL) {
3808 NL_SET_ERR_MSG(extack, "unknown ifindex");
3809 return -ENODEV;
3810 }
3811
3812 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3813 NL_SET_ERR_MSG(extack, "invalid address");
3814 return -EINVAL;
3815 }
3816
3817 if (dev->type != ARPHRD_ETHER) {
3818 NL_SET_ERR_MSG(extack, "FDB delete only supported for Ethernet devices");
3819 return -EINVAL;
3820 }
3821
3822 addr = nla_data(tb[NDA_LLADDR]);
3823
3824 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
3825 if (err)
3826 return err;
3827
3828 err = -EOPNOTSUPP;
3829
3830 /* Support fdb on master device the net/bridge default case */
3831 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3832 (dev->priv_flags & IFF_BRIDGE_PORT)) {
3833 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3834 const struct net_device_ops *ops = br_dev->netdev_ops;
3835
3836 if (ops->ndo_fdb_del)
3837 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
3838
3839 if (err)
3840 goto out;
3841 else
3842 ndm->ndm_flags &= ~NTF_MASTER;
3843 }
3844
3845 /* Embedded bridge, macvlan, and any other device support */
3846 if (ndm->ndm_flags & NTF_SELF) {
3847 if (dev->netdev_ops->ndo_fdb_del)
3848 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
3849 vid);
3850 else
3851 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
3852
3853 if (!err) {
3854 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
3855 ndm->ndm_state);
3856 ndm->ndm_flags &= ~NTF_SELF;
3857 }
3858 }
3859out:
3860 return err;
3861}
3862
3863static int nlmsg_populate_fdb(struct sk_buff *skb,
3864 struct netlink_callback *cb,
3865 struct net_device *dev,
3866 int *idx,
3867 struct netdev_hw_addr_list *list)
3868{
3869 struct netdev_hw_addr *ha;
3870 int err;
3871 u32 portid, seq;
3872
3873 portid = NETLINK_CB(cb->skb).portid;
3874 seq = cb->nlh->nlmsg_seq;
3875
3876 list_for_each_entry(ha, &list->list, list) {
3877 if (*idx < cb->args[2])
3878 goto skip;
3879
3880 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
3881 portid, seq,
3882 RTM_NEWNEIGH, NTF_SELF,
3883 NLM_F_MULTI, NUD_PERMANENT);
3884 if (err < 0)
3885 return err;
3886skip:
3887 *idx += 1;
3888 }
3889 return 0;
3890}
3891
3892/**
3893 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
3894 * @skb: socket buffer to store message in
3895 * @cb: netlink callback
3896 * @dev: netdevice
3897 * @filter_dev: ignored
3898 * @idx: the number of FDB table entries dumped is added to *@idx
3899 *
3900 * Default netdevice operation to dump the existing unicast address list.
3901 * Returns number of addresses from list put in skb.
3902 */
3903int ndo_dflt_fdb_dump(struct sk_buff *skb,
3904 struct netlink_callback *cb,
3905 struct net_device *dev,
3906 struct net_device *filter_dev,
3907 int *idx)
3908{
3909 int err;
3910
3911 if (dev->type != ARPHRD_ETHER)
3912 return -EINVAL;
3913
3914 netif_addr_lock_bh(dev);
3915 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
3916 if (err)
3917 goto out;
3918 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
3919out:
3920 netif_addr_unlock_bh(dev);
3921 return err;
3922}
3923EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3924
3925static int valid_fdb_dump_strict(const struct nlmsghdr *nlh,
3926 int *br_idx, int *brport_idx,
3927 struct netlink_ext_ack *extack)
3928{
3929 struct nlattr *tb[NDA_MAX + 1];
3930 struct ndmsg *ndm;
3931 int err, i;
3932
3933 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
3934 NL_SET_ERR_MSG(extack, "Invalid header for fdb dump request");
3935 return -EINVAL;
3936 }
3937
3938 ndm = nlmsg_data(nlh);
3939 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state ||
3940 ndm->ndm_flags || ndm->ndm_type) {
3941 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb dump request");
3942 return -EINVAL;
3943 }
3944
3945 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
3946 NDA_MAX, NULL, extack);
3947 if (err < 0)
3948 return err;
3949
3950 *brport_idx = ndm->ndm_ifindex;
3951 for (i = 0; i <= NDA_MAX; ++i) {
3952 if (!tb[i])
3953 continue;
3954
3955 switch (i) {
3956 case NDA_IFINDEX:
3957 if (nla_len(tb[i]) != sizeof(u32)) {
3958 NL_SET_ERR_MSG(extack, "Invalid IFINDEX attribute in fdb dump request");
3959 return -EINVAL;
3960 }
3961 *brport_idx = nla_get_u32(tb[NDA_IFINDEX]);
3962 break;
3963 case NDA_MASTER:
3964 if (nla_len(tb[i]) != sizeof(u32)) {
3965 NL_SET_ERR_MSG(extack, "Invalid MASTER attribute in fdb dump request");
3966 return -EINVAL;
3967 }
3968 *br_idx = nla_get_u32(tb[NDA_MASTER]);
3969 break;
3970 default:
3971 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb dump request");
3972 return -EINVAL;
3973 }
3974 }
3975
3976 return 0;
3977}
3978
3979static int valid_fdb_dump_legacy(const struct nlmsghdr *nlh,
3980 int *br_idx, int *brport_idx,
3981 struct netlink_ext_ack *extack)
3982{
3983 struct nlattr *tb[IFLA_MAX+1];
3984 int err;
3985
3986 /* A hack to preserve kernel<->userspace interface.
3987 * Before Linux v4.12 this code accepted ndmsg since iproute2 v3.3.0.
3988 * However, ndmsg is shorter than ifinfomsg thus nlmsg_parse() bails.
3989 * So, check for ndmsg with an optional u32 attribute (not used here).
3990 * Fortunately these sizes don't conflict with the size of ifinfomsg
3991 * with an optional attribute.
3992 */
3993 if (nlmsg_len(nlh) != sizeof(struct ndmsg) &&
3994 (nlmsg_len(nlh) != sizeof(struct ndmsg) +
3995 nla_attr_size(sizeof(u32)))) {
3996 struct ifinfomsg *ifm;
3997
3998 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
3999 tb, IFLA_MAX, ifla_policy,
4000 extack);
4001 if (err < 0) {
4002 return -EINVAL;
4003 } else if (err == 0) {
4004 if (tb[IFLA_MASTER])
4005 *br_idx = nla_get_u32(tb[IFLA_MASTER]);
4006 }
4007
4008 ifm = nlmsg_data(nlh);
4009 *brport_idx = ifm->ifi_index;
4010 }
4011 return 0;
4012}
4013
4014static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
4015{
4016 struct net_device *dev;
4017 struct net_device *br_dev = NULL;
4018 const struct net_device_ops *ops = NULL;
4019 const struct net_device_ops *cops = NULL;
4020 struct net *net = sock_net(skb->sk);
4021 struct hlist_head *head;
4022 int brport_idx = 0;
4023 int br_idx = 0;
4024 int h, s_h;
4025 int idx = 0, s_idx;
4026 int err = 0;
4027 int fidx = 0;
4028
4029 if (cb->strict_check)
4030 err = valid_fdb_dump_strict(cb->nlh, &br_idx, &brport_idx,
4031 cb->extack);
4032 else
4033 err = valid_fdb_dump_legacy(cb->nlh, &br_idx, &brport_idx,
4034 cb->extack);
4035 if (err < 0)
4036 return err;
4037
4038 if (br_idx) {
4039 br_dev = __dev_get_by_index(net, br_idx);
4040 if (!br_dev)
4041 return -ENODEV;
4042
4043 ops = br_dev->netdev_ops;
4044 }
4045
4046 s_h = cb->args[0];
4047 s_idx = cb->args[1];
4048
4049 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4050 idx = 0;
4051 head = &net->dev_index_head[h];
4052 hlist_for_each_entry(dev, head, index_hlist) {
4053
4054 if (brport_idx && (dev->ifindex != brport_idx))
4055 continue;
4056
4057 if (!br_idx) { /* user did not specify a specific bridge */
4058 if (dev->priv_flags & IFF_BRIDGE_PORT) {
4059 br_dev = netdev_master_upper_dev_get(dev);
4060 cops = br_dev->netdev_ops;
4061 }
4062 } else {
4063 if (dev != br_dev &&
4064 !(dev->priv_flags & IFF_BRIDGE_PORT))
4065 continue;
4066
4067 if (br_dev != netdev_master_upper_dev_get(dev) &&
4068 !(dev->priv_flags & IFF_EBRIDGE))
4069 continue;
4070 cops = ops;
4071 }
4072
4073 if (idx < s_idx)
4074 goto cont;
4075
4076 if (dev->priv_flags & IFF_BRIDGE_PORT) {
4077 if (cops && cops->ndo_fdb_dump) {
4078 err = cops->ndo_fdb_dump(skb, cb,
4079 br_dev, dev,
4080 &fidx);
4081 if (err == -EMSGSIZE)
4082 goto out;
4083 }
4084 }
4085
4086 if (dev->netdev_ops->ndo_fdb_dump)
4087 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
4088 dev, NULL,
4089 &fidx);
4090 else
4091 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
4092 &fidx);
4093 if (err == -EMSGSIZE)
4094 goto out;
4095
4096 cops = NULL;
4097
4098 /* reset fdb offset to 0 for rest of the interfaces */
4099 cb->args[2] = 0;
4100 fidx = 0;
4101cont:
4102 idx++;
4103 }
4104 }
4105
4106out:
4107 cb->args[0] = h;
4108 cb->args[1] = idx;
4109 cb->args[2] = fidx;
4110
4111 return skb->len;
4112}
4113
4114static int valid_fdb_get_strict(const struct nlmsghdr *nlh,
4115 struct nlattr **tb, u8 *ndm_flags,
4116 int *br_idx, int *brport_idx, u8 **addr,
4117 u16 *vid, struct netlink_ext_ack *extack)
4118{
4119 struct ndmsg *ndm;
4120 int err, i;
4121
4122 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
4123 NL_SET_ERR_MSG(extack, "Invalid header for fdb get request");
4124 return -EINVAL;
4125 }
4126
4127 ndm = nlmsg_data(nlh);
4128 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state ||
4129 ndm->ndm_type) {
4130 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb get request");
4131 return -EINVAL;
4132 }
4133
4134 if (ndm->ndm_flags & ~(NTF_MASTER | NTF_SELF)) {
4135 NL_SET_ERR_MSG(extack, "Invalid flags in header for fdb get request");
4136 return -EINVAL;
4137 }
4138
4139 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
4140 NDA_MAX, nda_policy, extack);
4141 if (err < 0)
4142 return err;
4143
4144 *ndm_flags = ndm->ndm_flags;
4145 *brport_idx = ndm->ndm_ifindex;
4146 for (i = 0; i <= NDA_MAX; ++i) {
4147 if (!tb[i])
4148 continue;
4149
4150 switch (i) {
4151 case NDA_MASTER:
4152 *br_idx = nla_get_u32(tb[i]);
4153 break;
4154 case NDA_LLADDR:
4155 if (nla_len(tb[i]) != ETH_ALEN) {
4156 NL_SET_ERR_MSG(extack, "Invalid address in fdb get request");
4157 return -EINVAL;
4158 }
4159 *addr = nla_data(tb[i]);
4160 break;
4161 case NDA_VLAN:
4162 err = fdb_vid_parse(tb[i], vid, extack);
4163 if (err)
4164 return err;
4165 break;
4166 case NDA_VNI:
4167 break;
4168 default:
4169 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb get request");
4170 return -EINVAL;
4171 }
4172 }
4173
4174 return 0;
4175}
4176
4177static int rtnl_fdb_get(struct sk_buff *in_skb, struct nlmsghdr *nlh,
4178 struct netlink_ext_ack *extack)
4179{
4180 struct net_device *dev = NULL, *br_dev = NULL;
4181 const struct net_device_ops *ops = NULL;
4182 struct net *net = sock_net(in_skb->sk);
4183 struct nlattr *tb[NDA_MAX + 1];
4184 struct sk_buff *skb;
4185 int brport_idx = 0;
4186 u8 ndm_flags = 0;
4187 int br_idx = 0;
4188 u8 *addr = NULL;
4189 u16 vid = 0;
4190 int err;
4191
4192 err = valid_fdb_get_strict(nlh, tb, &ndm_flags, &br_idx,
4193 &brport_idx, &addr, &vid, extack);
4194 if (err < 0)
4195 return err;
4196
4197 if (!addr) {
4198 NL_SET_ERR_MSG(extack, "Missing lookup address for fdb get request");
4199 return -EINVAL;
4200 }
4201
4202 if (brport_idx) {
4203 dev = __dev_get_by_index(net, brport_idx);
4204 if (!dev) {
4205 NL_SET_ERR_MSG(extack, "Unknown device ifindex");
4206 return -ENODEV;
4207 }
4208 }
4209
4210 if (br_idx) {
4211 if (dev) {
4212 NL_SET_ERR_MSG(extack, "Master and device are mutually exclusive");
4213 return -EINVAL;
4214 }
4215
4216 br_dev = __dev_get_by_index(net, br_idx);
4217 if (!br_dev) {
4218 NL_SET_ERR_MSG(extack, "Invalid master ifindex");
4219 return -EINVAL;
4220 }
4221 ops = br_dev->netdev_ops;
4222 }
4223
4224 if (dev) {
4225 if (!ndm_flags || (ndm_flags & NTF_MASTER)) {
4226 if (!(dev->priv_flags & IFF_BRIDGE_PORT)) {
4227 NL_SET_ERR_MSG(extack, "Device is not a bridge port");
4228 return -EINVAL;
4229 }
4230 br_dev = netdev_master_upper_dev_get(dev);
4231 if (!br_dev) {
4232 NL_SET_ERR_MSG(extack, "Master of device not found");
4233 return -EINVAL;
4234 }
4235 ops = br_dev->netdev_ops;
4236 } else {
4237 if (!(ndm_flags & NTF_SELF)) {
4238 NL_SET_ERR_MSG(extack, "Missing NTF_SELF");
4239 return -EINVAL;
4240 }
4241 ops = dev->netdev_ops;
4242 }
4243 }
4244
4245 if (!br_dev && !dev) {
4246 NL_SET_ERR_MSG(extack, "No device specified");
4247 return -ENODEV;
4248 }
4249
4250 if (!ops || !ops->ndo_fdb_get) {
4251 NL_SET_ERR_MSG(extack, "Fdb get operation not supported by device");
4252 return -EOPNOTSUPP;
4253 }
4254
4255 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
4256 if (!skb)
4257 return -ENOBUFS;
4258
4259 if (br_dev)
4260 dev = br_dev;
4261 err = ops->ndo_fdb_get(skb, tb, dev, addr, vid,
4262 NETLINK_CB(in_skb).portid,
4263 nlh->nlmsg_seq, extack);
4264 if (err)
4265 goto out;
4266
4267 return rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
4268out:
4269 kfree_skb(skb);
4270 return err;
4271}
4272
4273static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
4274 unsigned int attrnum, unsigned int flag)
4275{
4276 if (mask & flag)
4277 return nla_put_u8(skb, attrnum, !!(flags & flag));
4278 return 0;
4279}
4280
4281int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
4282 struct net_device *dev, u16 mode,
4283 u32 flags, u32 mask, int nlflags,
4284 u32 filter_mask,
4285 int (*vlan_fill)(struct sk_buff *skb,
4286 struct net_device *dev,
4287 u32 filter_mask))
4288{
4289 struct nlmsghdr *nlh;
4290 struct ifinfomsg *ifm;
4291 struct nlattr *br_afspec;
4292 struct nlattr *protinfo;
4293 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
4294 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4295 int err = 0;
4296
4297 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
4298 if (nlh == NULL)
4299 return -EMSGSIZE;
4300
4301 ifm = nlmsg_data(nlh);
4302 ifm->ifi_family = AF_BRIDGE;
4303 ifm->__ifi_pad = 0;
4304 ifm->ifi_type = dev->type;
4305 ifm->ifi_index = dev->ifindex;
4306 ifm->ifi_flags = dev_get_flags(dev);
4307 ifm->ifi_change = 0;
4308
4309
4310 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
4311 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
4312 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
4313 (br_dev &&
4314 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
4315 (dev->addr_len &&
4316 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
4317 (dev->ifindex != dev_get_iflink(dev) &&
4318 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
4319 goto nla_put_failure;
4320
4321 br_afspec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
4322 if (!br_afspec)
4323 goto nla_put_failure;
4324
4325 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
4326 nla_nest_cancel(skb, br_afspec);
4327 goto nla_put_failure;
4328 }
4329
4330 if (mode != BRIDGE_MODE_UNDEF) {
4331 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
4332 nla_nest_cancel(skb, br_afspec);
4333 goto nla_put_failure;
4334 }
4335 }
4336 if (vlan_fill) {
4337 err = vlan_fill(skb, dev, filter_mask);
4338 if (err) {
4339 nla_nest_cancel(skb, br_afspec);
4340 goto nla_put_failure;
4341 }
4342 }
4343 nla_nest_end(skb, br_afspec);
4344
4345 protinfo = nla_nest_start(skb, IFLA_PROTINFO);
4346 if (!protinfo)
4347 goto nla_put_failure;
4348
4349 if (brport_nla_put_flag(skb, flags, mask,
4350 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
4351 brport_nla_put_flag(skb, flags, mask,
4352 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
4353 brport_nla_put_flag(skb, flags, mask,
4354 IFLA_BRPORT_FAST_LEAVE,
4355 BR_MULTICAST_FAST_LEAVE) ||
4356 brport_nla_put_flag(skb, flags, mask,
4357 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
4358 brport_nla_put_flag(skb, flags, mask,
4359 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
4360 brport_nla_put_flag(skb, flags, mask,
4361 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
4362 brport_nla_put_flag(skb, flags, mask,
4363 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
4364 brport_nla_put_flag(skb, flags, mask,
4365 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
4366 nla_nest_cancel(skb, protinfo);
4367 goto nla_put_failure;
4368 }
4369
4370 nla_nest_end(skb, protinfo);
4371
4372 nlmsg_end(skb, nlh);
4373 return 0;
4374nla_put_failure:
4375 nlmsg_cancel(skb, nlh);
4376 return err ? err : -EMSGSIZE;
4377}
4378EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
4379
4380static int valid_bridge_getlink_req(const struct nlmsghdr *nlh,
4381 bool strict_check, u32 *filter_mask,
4382 struct netlink_ext_ack *extack)
4383{
4384 struct nlattr *tb[IFLA_MAX+1];
4385 int err, i;
4386
4387 if (strict_check) {
4388 struct ifinfomsg *ifm;
4389
4390 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
4391 NL_SET_ERR_MSG(extack, "Invalid header for bridge link dump");
4392 return -EINVAL;
4393 }
4394
4395 ifm = nlmsg_data(nlh);
4396 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
4397 ifm->ifi_change || ifm->ifi_index) {
4398 NL_SET_ERR_MSG(extack, "Invalid values in header for bridge link dump request");
4399 return -EINVAL;
4400 }
4401
4402 err = nlmsg_parse_deprecated_strict(nlh,
4403 sizeof(struct ifinfomsg),
4404 tb, IFLA_MAX, ifla_policy,
4405 extack);
4406 } else {
4407 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
4408 tb, IFLA_MAX, ifla_policy,
4409 extack);
4410 }
4411 if (err < 0)
4412 return err;
4413
4414 /* new attributes should only be added with strict checking */
4415 for (i = 0; i <= IFLA_MAX; ++i) {
4416 if (!tb[i])
4417 continue;
4418
4419 switch (i) {
4420 case IFLA_EXT_MASK:
4421 *filter_mask = nla_get_u32(tb[i]);
4422 break;
4423 default:
4424 if (strict_check) {
4425 NL_SET_ERR_MSG(extack, "Unsupported attribute in bridge link dump request");
4426 return -EINVAL;
4427 }
4428 }
4429 }
4430
4431 return 0;
4432}
4433
4434static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
4435{
4436 const struct nlmsghdr *nlh = cb->nlh;
4437 struct net *net = sock_net(skb->sk);
4438 struct net_device *dev;
4439 int idx = 0;
4440 u32 portid = NETLINK_CB(cb->skb).portid;
4441 u32 seq = nlh->nlmsg_seq;
4442 u32 filter_mask = 0;
4443 int err;
4444
4445 err = valid_bridge_getlink_req(nlh, cb->strict_check, &filter_mask,
4446 cb->extack);
4447 if (err < 0 && cb->strict_check)
4448 return err;
4449
4450 rcu_read_lock();
4451 for_each_netdev_rcu(net, dev) {
4452 const struct net_device_ops *ops = dev->netdev_ops;
4453 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4454
4455 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
4456 if (idx >= cb->args[0]) {
4457 err = br_dev->netdev_ops->ndo_bridge_getlink(
4458 skb, portid, seq, dev,
4459 filter_mask, NLM_F_MULTI);
4460 if (err < 0 && err != -EOPNOTSUPP) {
4461 if (likely(skb->len))
4462 break;
4463
4464 goto out_err;
4465 }
4466 }
4467 idx++;
4468 }
4469
4470 if (ops->ndo_bridge_getlink) {
4471 if (idx >= cb->args[0]) {
4472 err = ops->ndo_bridge_getlink(skb, portid,
4473 seq, dev,
4474 filter_mask,
4475 NLM_F_MULTI);
4476 if (err < 0 && err != -EOPNOTSUPP) {
4477 if (likely(skb->len))
4478 break;
4479
4480 goto out_err;
4481 }
4482 }
4483 idx++;
4484 }
4485 }
4486 err = skb->len;
4487out_err:
4488 rcu_read_unlock();
4489 cb->args[0] = idx;
4490
4491 return err;
4492}
4493
4494static inline size_t bridge_nlmsg_size(void)
4495{
4496 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
4497 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
4498 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
4499 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
4500 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
4501 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
4502 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
4503 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
4504 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
4505 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
4506 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
4507}
4508
4509static int rtnl_bridge_notify(struct net_device *dev)
4510{
4511 struct net *net = dev_net(dev);
4512 struct sk_buff *skb;
4513 int err = -EOPNOTSUPP;
4514
4515 if (!dev->netdev_ops->ndo_bridge_getlink)
4516 return 0;
4517
4518 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
4519 if (!skb) {
4520 err = -ENOMEM;
4521 goto errout;
4522 }
4523
4524 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
4525 if (err < 0)
4526 goto errout;
4527
4528 if (!skb->len)
4529 goto errout;
4530
4531 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
4532 return 0;
4533errout:
4534 WARN_ON(err == -EMSGSIZE);
4535 kfree_skb(skb);
4536 if (err)
4537 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
4538 return err;
4539}
4540
4541static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
4542 struct netlink_ext_ack *extack)
4543{
4544 struct net *net = sock_net(skb->sk);
4545 struct ifinfomsg *ifm;
4546 struct net_device *dev;
4547 struct nlattr *br_spec, *attr = NULL;
4548 int rem, err = -EOPNOTSUPP;
4549 u16 flags = 0;
4550 bool have_flags = false;
4551
4552 if (nlmsg_len(nlh) < sizeof(*ifm))
4553 return -EINVAL;
4554
4555 ifm = nlmsg_data(nlh);
4556 if (ifm->ifi_family != AF_BRIDGE)
4557 return -EPFNOSUPPORT;
4558
4559 dev = __dev_get_by_index(net, ifm->ifi_index);
4560 if (!dev) {
4561 NL_SET_ERR_MSG(extack, "unknown ifindex");
4562 return -ENODEV;
4563 }
4564
4565 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
4566 if (br_spec) {
4567 nla_for_each_nested(attr, br_spec, rem) {
4568 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
4569 if (nla_len(attr) < sizeof(flags))
4570 return -EINVAL;
4571
4572 have_flags = true;
4573 flags = nla_get_u16(attr);
4574 break;
4575 }
4576 }
4577 }
4578
4579 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
4580 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4581
4582 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
4583 err = -EOPNOTSUPP;
4584 goto out;
4585 }
4586
4587 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags,
4588 extack);
4589 if (err)
4590 goto out;
4591
4592 flags &= ~BRIDGE_FLAGS_MASTER;
4593 }
4594
4595 if ((flags & BRIDGE_FLAGS_SELF)) {
4596 if (!dev->netdev_ops->ndo_bridge_setlink)
4597 err = -EOPNOTSUPP;
4598 else
4599 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
4600 flags,
4601 extack);
4602 if (!err) {
4603 flags &= ~BRIDGE_FLAGS_SELF;
4604
4605 /* Generate event to notify upper layer of bridge
4606 * change
4607 */
4608 err = rtnl_bridge_notify(dev);
4609 }
4610 }
4611
4612 if (have_flags)
4613 memcpy(nla_data(attr), &flags, sizeof(flags));
4614out:
4615 return err;
4616}
4617
4618static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
4619 struct netlink_ext_ack *extack)
4620{
4621 struct net *net = sock_net(skb->sk);
4622 struct ifinfomsg *ifm;
4623 struct net_device *dev;
4624 struct nlattr *br_spec, *attr = NULL;
4625 int rem, err = -EOPNOTSUPP;
4626 u16 flags = 0;
4627 bool have_flags = false;
4628
4629 if (nlmsg_len(nlh) < sizeof(*ifm))
4630 return -EINVAL;
4631
4632 ifm = nlmsg_data(nlh);
4633 if (ifm->ifi_family != AF_BRIDGE)
4634 return -EPFNOSUPPORT;
4635
4636 dev = __dev_get_by_index(net, ifm->ifi_index);
4637 if (!dev) {
4638 NL_SET_ERR_MSG(extack, "unknown ifindex");
4639 return -ENODEV;
4640 }
4641
4642 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
4643 if (br_spec) {
4644 nla_for_each_nested(attr, br_spec, rem) {
4645 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
4646 if (nla_len(attr) < sizeof(flags))
4647 return -EINVAL;
4648
4649 have_flags = true;
4650 flags = nla_get_u16(attr);
4651 break;
4652 }
4653 }
4654 }
4655
4656 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
4657 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4658
4659 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
4660 err = -EOPNOTSUPP;
4661 goto out;
4662 }
4663
4664 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
4665 if (err)
4666 goto out;
4667
4668 flags &= ~BRIDGE_FLAGS_MASTER;
4669 }
4670
4671 if ((flags & BRIDGE_FLAGS_SELF)) {
4672 if (!dev->netdev_ops->ndo_bridge_dellink)
4673 err = -EOPNOTSUPP;
4674 else
4675 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
4676 flags);
4677
4678 if (!err) {
4679 flags &= ~BRIDGE_FLAGS_SELF;
4680
4681 /* Generate event to notify upper layer of bridge
4682 * change
4683 */
4684 err = rtnl_bridge_notify(dev);
4685 }
4686 }
4687
4688 if (have_flags)
4689 memcpy(nla_data(attr), &flags, sizeof(flags));
4690out:
4691 return err;
4692}
4693
4694static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
4695{
4696 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
4697 (!idxattr || idxattr == attrid);
4698}
4699
4700#define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1)
4701static int rtnl_get_offload_stats_attr_size(int attr_id)
4702{
4703 switch (attr_id) {
4704 case IFLA_OFFLOAD_XSTATS_CPU_HIT:
4705 return sizeof(struct rtnl_link_stats64);
4706 }
4707
4708 return 0;
4709}
4710
4711static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev,
4712 int *prividx)
4713{
4714 struct nlattr *attr = NULL;
4715 int attr_id, size;
4716 void *attr_data;
4717 int err;
4718
4719 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
4720 dev->netdev_ops->ndo_get_offload_stats))
4721 return -ENODATA;
4722
4723 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
4724 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
4725 if (attr_id < *prividx)
4726 continue;
4727
4728 size = rtnl_get_offload_stats_attr_size(attr_id);
4729 if (!size)
4730 continue;
4731
4732 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
4733 continue;
4734
4735 attr = nla_reserve_64bit(skb, attr_id, size,
4736 IFLA_OFFLOAD_XSTATS_UNSPEC);
4737 if (!attr)
4738 goto nla_put_failure;
4739
4740 attr_data = nla_data(attr);
4741 memset(attr_data, 0, size);
4742 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev,
4743 attr_data);
4744 if (err)
4745 goto get_offload_stats_failure;
4746 }
4747
4748 if (!attr)
4749 return -ENODATA;
4750
4751 *prividx = 0;
4752 return 0;
4753
4754nla_put_failure:
4755 err = -EMSGSIZE;
4756get_offload_stats_failure:
4757 *prividx = attr_id;
4758 return err;
4759}
4760
4761static int rtnl_get_offload_stats_size(const struct net_device *dev)
4762{
4763 int nla_size = 0;
4764 int attr_id;
4765 int size;
4766
4767 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
4768 dev->netdev_ops->ndo_get_offload_stats))
4769 return 0;
4770
4771 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
4772 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
4773 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
4774 continue;
4775 size = rtnl_get_offload_stats_attr_size(attr_id);
4776 nla_size += nla_total_size_64bit(size);
4777 }
4778
4779 if (nla_size != 0)
4780 nla_size += nla_total_size(0);
4781
4782 return nla_size;
4783}
4784
4785static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
4786 int type, u32 pid, u32 seq, u32 change,
4787 unsigned int flags, unsigned int filter_mask,
4788 int *idxattr, int *prividx)
4789{
4790 struct if_stats_msg *ifsm;
4791 struct nlmsghdr *nlh;
4792 struct nlattr *attr;
4793 int s_prividx = *prividx;
4794 int err;
4795
4796 ASSERT_RTNL();
4797
4798 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
4799 if (!nlh)
4800 return -EMSGSIZE;
4801
4802 ifsm = nlmsg_data(nlh);
4803 ifsm->family = PF_UNSPEC;
4804 ifsm->pad1 = 0;
4805 ifsm->pad2 = 0;
4806 ifsm->ifindex = dev->ifindex;
4807 ifsm->filter_mask = filter_mask;
4808
4809 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
4810 struct rtnl_link_stats64 *sp;
4811
4812 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
4813 sizeof(struct rtnl_link_stats64),
4814 IFLA_STATS_UNSPEC);
4815 if (!attr)
4816 goto nla_put_failure;
4817
4818 sp = nla_data(attr);
4819 dev_get_stats(dev, sp);
4820 }
4821
4822 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
4823 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
4824
4825 if (ops && ops->fill_linkxstats) {
4826 *idxattr = IFLA_STATS_LINK_XSTATS;
4827 attr = nla_nest_start_noflag(skb,
4828 IFLA_STATS_LINK_XSTATS);
4829 if (!attr)
4830 goto nla_put_failure;
4831
4832 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
4833 nla_nest_end(skb, attr);
4834 if (err)
4835 goto nla_put_failure;
4836 *idxattr = 0;
4837 }
4838 }
4839
4840 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
4841 *idxattr)) {
4842 const struct rtnl_link_ops *ops = NULL;
4843 const struct net_device *master;
4844
4845 master = netdev_master_upper_dev_get(dev);
4846 if (master)
4847 ops = master->rtnl_link_ops;
4848 if (ops && ops->fill_linkxstats) {
4849 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
4850 attr = nla_nest_start_noflag(skb,
4851 IFLA_STATS_LINK_XSTATS_SLAVE);
4852 if (!attr)
4853 goto nla_put_failure;
4854
4855 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
4856 nla_nest_end(skb, attr);
4857 if (err)
4858 goto nla_put_failure;
4859 *idxattr = 0;
4860 }
4861 }
4862
4863 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
4864 *idxattr)) {
4865 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
4866 attr = nla_nest_start_noflag(skb,
4867 IFLA_STATS_LINK_OFFLOAD_XSTATS);
4868 if (!attr)
4869 goto nla_put_failure;
4870
4871 err = rtnl_get_offload_stats(skb, dev, prividx);
4872 if (err == -ENODATA)
4873 nla_nest_cancel(skb, attr);
4874 else
4875 nla_nest_end(skb, attr);
4876
4877 if (err && err != -ENODATA)
4878 goto nla_put_failure;
4879 *idxattr = 0;
4880 }
4881
4882 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
4883 struct rtnl_af_ops *af_ops;
4884
4885 *idxattr = IFLA_STATS_AF_SPEC;
4886 attr = nla_nest_start_noflag(skb, IFLA_STATS_AF_SPEC);
4887 if (!attr)
4888 goto nla_put_failure;
4889
4890 rcu_read_lock();
4891 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
4892 if (af_ops->fill_stats_af) {
4893 struct nlattr *af;
4894 int err;
4895
4896 af = nla_nest_start_noflag(skb,
4897 af_ops->family);
4898 if (!af) {
4899 rcu_read_unlock();
4900 goto nla_put_failure;
4901 }
4902 err = af_ops->fill_stats_af(skb, dev);
4903
4904 if (err == -ENODATA) {
4905 nla_nest_cancel(skb, af);
4906 } else if (err < 0) {
4907 rcu_read_unlock();
4908 goto nla_put_failure;
4909 }
4910
4911 nla_nest_end(skb, af);
4912 }
4913 }
4914 rcu_read_unlock();
4915
4916 nla_nest_end(skb, attr);
4917
4918 *idxattr = 0;
4919 }
4920
4921 nlmsg_end(skb, nlh);
4922
4923 return 0;
4924
4925nla_put_failure:
4926 /* not a multi message or no progress mean a real error */
4927 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
4928 nlmsg_cancel(skb, nlh);
4929 else
4930 nlmsg_end(skb, nlh);
4931
4932 return -EMSGSIZE;
4933}
4934
4935static size_t if_nlmsg_stats_size(const struct net_device *dev,
4936 u32 filter_mask)
4937{
4938 size_t size = 0;
4939
4940 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
4941 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
4942
4943 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
4944 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
4945 int attr = IFLA_STATS_LINK_XSTATS;
4946
4947 if (ops && ops->get_linkxstats_size) {
4948 size += nla_total_size(ops->get_linkxstats_size(dev,
4949 attr));
4950 /* for IFLA_STATS_LINK_XSTATS */
4951 size += nla_total_size(0);
4952 }
4953 }
4954
4955 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
4956 struct net_device *_dev = (struct net_device *)dev;
4957 const struct rtnl_link_ops *ops = NULL;
4958 const struct net_device *master;
4959
4960 /* netdev_master_upper_dev_get can't take const */
4961 master = netdev_master_upper_dev_get(_dev);
4962 if (master)
4963 ops = master->rtnl_link_ops;
4964 if (ops && ops->get_linkxstats_size) {
4965 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
4966
4967 size += nla_total_size(ops->get_linkxstats_size(dev,
4968 attr));
4969 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
4970 size += nla_total_size(0);
4971 }
4972 }
4973
4974 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
4975 size += rtnl_get_offload_stats_size(dev);
4976
4977 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
4978 struct rtnl_af_ops *af_ops;
4979
4980 /* for IFLA_STATS_AF_SPEC */
4981 size += nla_total_size(0);
4982
4983 rcu_read_lock();
4984 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
4985 if (af_ops->get_stats_af_size) {
4986 size += nla_total_size(
4987 af_ops->get_stats_af_size(dev));
4988
4989 /* for AF_* */
4990 size += nla_total_size(0);
4991 }
4992 }
4993 rcu_read_unlock();
4994 }
4995
4996 return size;
4997}
4998
4999static int rtnl_valid_stats_req(const struct nlmsghdr *nlh, bool strict_check,
5000 bool is_dump, struct netlink_ext_ack *extack)
5001{
5002 struct if_stats_msg *ifsm;
5003
5004 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifsm))) {
5005 NL_SET_ERR_MSG(extack, "Invalid header for stats dump");
5006 return -EINVAL;
5007 }
5008
5009 if (!strict_check)
5010 return 0;
5011
5012 ifsm = nlmsg_data(nlh);
5013
5014 /* only requests using strict checks can pass data to influence
5015 * the dump. The legacy exception is filter_mask.
5016 */
5017 if (ifsm->pad1 || ifsm->pad2 || (is_dump && ifsm->ifindex)) {
5018 NL_SET_ERR_MSG(extack, "Invalid values in header for stats dump request");
5019 return -EINVAL;
5020 }
5021 if (nlmsg_attrlen(nlh, sizeof(*ifsm))) {
5022 NL_SET_ERR_MSG(extack, "Invalid attributes after stats header");
5023 return -EINVAL;
5024 }
5025 if (ifsm->filter_mask >= IFLA_STATS_FILTER_BIT(IFLA_STATS_MAX + 1)) {
5026 NL_SET_ERR_MSG(extack, "Invalid stats requested through filter mask");
5027 return -EINVAL;
5028 }
5029
5030 return 0;
5031}
5032
5033static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
5034 struct netlink_ext_ack *extack)
5035{
5036 struct net *net = sock_net(skb->sk);
5037 struct net_device *dev = NULL;
5038 int idxattr = 0, prividx = 0;
5039 struct if_stats_msg *ifsm;
5040 struct sk_buff *nskb;
5041 u32 filter_mask;
5042 int err;
5043
5044 err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb),
5045 false, extack);
5046 if (err)
5047 return err;
5048
5049 ifsm = nlmsg_data(nlh);
5050 if (ifsm->ifindex > 0)
5051 dev = __dev_get_by_index(net, ifsm->ifindex);
5052 else
5053 return -EINVAL;
5054
5055 if (!dev)
5056 return -ENODEV;
5057
5058 filter_mask = ifsm->filter_mask;
5059 if (!filter_mask)
5060 return -EINVAL;
5061
5062 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
5063 if (!nskb)
5064 return -ENOBUFS;
5065
5066 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
5067 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
5068 0, filter_mask, &idxattr, &prividx);
5069 if (err < 0) {
5070 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
5071 WARN_ON(err == -EMSGSIZE);
5072 kfree_skb(nskb);
5073 } else {
5074 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
5075 }
5076
5077 return err;
5078}
5079
5080static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
5081{
5082 struct netlink_ext_ack *extack = cb->extack;
5083 int h, s_h, err, s_idx, s_idxattr, s_prividx;
5084 struct net *net = sock_net(skb->sk);
5085 unsigned int flags = NLM_F_MULTI;
5086 struct if_stats_msg *ifsm;
5087 struct hlist_head *head;
5088 struct net_device *dev;
5089 u32 filter_mask = 0;
5090 int idx = 0;
5091
5092 s_h = cb->args[0];
5093 s_idx = cb->args[1];
5094 s_idxattr = cb->args[2];
5095 s_prividx = cb->args[3];
5096
5097 cb->seq = net->dev_base_seq;
5098
5099 err = rtnl_valid_stats_req(cb->nlh, cb->strict_check, true, extack);
5100 if (err)
5101 return err;
5102
5103 ifsm = nlmsg_data(cb->nlh);
5104 filter_mask = ifsm->filter_mask;
5105 if (!filter_mask) {
5106 NL_SET_ERR_MSG(extack, "Filter mask must be set for stats dump");
5107 return -EINVAL;
5108 }
5109
5110 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
5111 idx = 0;
5112 head = &net->dev_index_head[h];
5113 hlist_for_each_entry(dev, head, index_hlist) {
5114 if (idx < s_idx)
5115 goto cont;
5116 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
5117 NETLINK_CB(cb->skb).portid,
5118 cb->nlh->nlmsg_seq, 0,
5119 flags, filter_mask,
5120 &s_idxattr, &s_prividx);
5121 /* If we ran out of room on the first message,
5122 * we're in trouble
5123 */
5124 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
5125
5126 if (err < 0)
5127 goto out;
5128 s_prividx = 0;
5129 s_idxattr = 0;
5130 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
5131cont:
5132 idx++;
5133 }
5134 }
5135out:
5136 cb->args[3] = s_prividx;
5137 cb->args[2] = s_idxattr;
5138 cb->args[1] = idx;
5139 cb->args[0] = h;
5140
5141 return skb->len;
5142}
5143
5144/* Process one rtnetlink message. */
5145
5146static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
5147 struct netlink_ext_ack *extack)
5148{
5149 struct net *net = sock_net(skb->sk);
5150 struct rtnl_link *link;
5151 struct module *owner;
5152 int err = -EOPNOTSUPP;
5153 rtnl_doit_func doit;
5154 unsigned int flags;
5155 int kind;
5156 int family;
5157 int type;
5158
5159 type = nlh->nlmsg_type;
5160 if (type > RTM_MAX)
5161 return -EOPNOTSUPP;
5162
5163 type -= RTM_BASE;
5164
5165 /* All the messages must have at least 1 byte length */
5166 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
5167 return 0;
5168
5169 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
5170 kind = type&3;
5171
5172 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
5173 return -EPERM;
5174
5175 rcu_read_lock();
5176 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
5177 struct sock *rtnl;
5178 rtnl_dumpit_func dumpit;
5179 u16 min_dump_alloc = 0;
5180
5181 link = rtnl_get_link(family, type);
5182 if (!link || !link->dumpit) {
5183 family = PF_UNSPEC;
5184 link = rtnl_get_link(family, type);
5185 if (!link || !link->dumpit)
5186 goto err_unlock;
5187 }
5188 owner = link->owner;
5189 dumpit = link->dumpit;
5190
5191 if (type == RTM_GETLINK - RTM_BASE)
5192 min_dump_alloc = rtnl_calcit(skb, nlh);
5193
5194 err = 0;
5195 /* need to do this before rcu_read_unlock() */
5196 if (!try_module_get(owner))
5197 err = -EPROTONOSUPPORT;
5198
5199 rcu_read_unlock();
5200
5201 rtnl = net->rtnl;
5202 if (err == 0) {
5203 struct netlink_dump_control c = {
5204 .dump = dumpit,
5205 .min_dump_alloc = min_dump_alloc,
5206 .module = owner,
5207 };
5208 err = netlink_dump_start(rtnl, skb, nlh, &c);
5209 /* netlink_dump_start() will keep a reference on
5210 * module if dump is still in progress.
5211 */
5212 module_put(owner);
5213 }
5214 return err;
5215 }
5216
5217 link = rtnl_get_link(family, type);
5218 if (!link || !link->doit) {
5219 family = PF_UNSPEC;
5220 link = rtnl_get_link(PF_UNSPEC, type);
5221 if (!link || !link->doit)
5222 goto out_unlock;
5223 }
5224
5225 owner = link->owner;
5226 if (!try_module_get(owner)) {
5227 err = -EPROTONOSUPPORT;
5228 goto out_unlock;
5229 }
5230
5231 flags = link->flags;
5232 if (flags & RTNL_FLAG_DOIT_UNLOCKED) {
5233 doit = link->doit;
5234 rcu_read_unlock();
5235 if (doit)
5236 err = doit(skb, nlh, extack);
5237 module_put(owner);
5238 return err;
5239 }
5240 rcu_read_unlock();
5241
5242 rtnl_lock();
5243 link = rtnl_get_link(family, type);
5244 if (link && link->doit)
5245 err = link->doit(skb, nlh, extack);
5246 rtnl_unlock();
5247
5248 module_put(owner);
5249
5250 return err;
5251
5252out_unlock:
5253 rcu_read_unlock();
5254 return err;
5255
5256err_unlock:
5257 rcu_read_unlock();
5258 return -EOPNOTSUPP;
5259}
5260
5261static void rtnetlink_rcv(struct sk_buff *skb)
5262{
5263 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
5264}
5265
5266static int rtnetlink_bind(struct net *net, int group)
5267{
5268 switch (group) {
5269 case RTNLGRP_IPV4_MROUTE_R:
5270 case RTNLGRP_IPV6_MROUTE_R:
5271 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
5272 return -EPERM;
5273 break;
5274 }
5275 return 0;
5276}
5277
5278static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
5279{
5280 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
5281
5282 switch (event) {
5283 case NETDEV_REBOOT:
5284 case NETDEV_CHANGEMTU:
5285 case NETDEV_CHANGEADDR:
5286 case NETDEV_CHANGENAME:
5287 case NETDEV_FEAT_CHANGE:
5288 case NETDEV_BONDING_FAILOVER:
5289 case NETDEV_POST_TYPE_CHANGE:
5290 case NETDEV_NOTIFY_PEERS:
5291 case NETDEV_CHANGEUPPER:
5292 case NETDEV_RESEND_IGMP:
5293 case NETDEV_CHANGEINFODATA:
5294 case NETDEV_CHANGELOWERSTATE:
5295 case NETDEV_CHANGE_TX_QUEUE_LEN:
5296 rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event),
5297 GFP_KERNEL, NULL, 0);
5298 break;
5299 default:
5300 break;
5301 }
5302 return NOTIFY_DONE;
5303}
5304
5305static struct notifier_block rtnetlink_dev_notifier = {
5306 .notifier_call = rtnetlink_event,
5307};
5308
5309
5310static int __net_init rtnetlink_net_init(struct net *net)
5311{
5312 struct sock *sk;
5313 struct netlink_kernel_cfg cfg = {
5314 .groups = RTNLGRP_MAX,
5315 .input = rtnetlink_rcv,
5316 .cb_mutex = &rtnl_mutex,
5317 .flags = NL_CFG_F_NONROOT_RECV,
5318 .bind = rtnetlink_bind,
5319 };
5320
5321 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
5322 if (!sk)
5323 return -ENOMEM;
5324 net->rtnl = sk;
5325 return 0;
5326}
5327
5328static void __net_exit rtnetlink_net_exit(struct net *net)
5329{
5330 netlink_kernel_release(net->rtnl);
5331 net->rtnl = NULL;
5332}
5333
5334static struct pernet_operations rtnetlink_net_ops = {
5335 .init = rtnetlink_net_init,
5336 .exit = rtnetlink_net_exit,
5337};
5338
5339void __init rtnetlink_init(void)
5340{
5341 if (register_pernet_subsys(&rtnetlink_net_ops))
5342 panic("rtnetlink_init: cannot initialize rtnetlink\n");
5343
5344 register_netdevice_notifier(&rtnetlink_dev_notifier);
5345
5346 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
5347 rtnl_dump_ifinfo, 0);
5348 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, 0);
5349 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, 0);
5350 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, 0);
5351
5352 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, 0);
5353 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, 0);
5354 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, 0);
5355
5356 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0);
5357 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, 0);
5358 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, rtnl_fdb_get, rtnl_fdb_dump, 0);
5359
5360 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, 0);
5361 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, 0);
5362 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, 0);
5363
5364 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
5365 0);
5366}