2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Routing netlink socket interface: protocol independent part.
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
19 #include <linux/bitops.h>
20 #include <linux/errno.h>
21 #include <linux/module.h>
22 #include <linux/types.h>
23 #include <linux/socket.h>
24 #include <linux/kernel.h>
25 #include <linux/timer.h>
26 #include <linux/string.h>
27 #include <linux/sockios.h>
28 #include <linux/net.h>
29 #include <linux/fcntl.h>
31 #include <linux/slab.h>
32 #include <linux/interrupt.h>
33 #include <linux/capability.h>
34 #include <linux/skbuff.h>
35 #include <linux/init.h>
36 #include <linux/security.h>
37 #include <linux/mutex.h>
38 #include <linux/if_addr.h>
39 #include <linux/if_bridge.h>
40 #include <linux/if_vlan.h>
41 #include <linux/pci.h>
42 #include <linux/etherdevice.h>
43 #include <linux/bpf.h>
45 #include <linux/uaccess.h>
47 #include <linux/inet.h>
48 #include <linux/netdevice.h>
49 #include <net/switchdev.h>
51 #include <net/protocol.h>
53 #include <net/route.h>
57 #include <net/pkt_sched.h>
58 #include <net/fib_rules.h>
59 #include <net/rtnetlink.h>
60 #include <net/net_namespace.h>
64 rtnl_dumpit_func dumpit
;
68 static DEFINE_MUTEX(rtnl_mutex
);
72 mutex_lock(&rtnl_mutex
);
74 EXPORT_SYMBOL(rtnl_lock
);
76 static struct sk_buff
*defer_kfree_skb_list
;
77 void rtnl_kfree_skbs(struct sk_buff
*head
, struct sk_buff
*tail
)
80 tail
->next
= defer_kfree_skb_list
;
81 defer_kfree_skb_list
= head
;
84 EXPORT_SYMBOL(rtnl_kfree_skbs
);
86 void __rtnl_unlock(void)
88 struct sk_buff
*head
= defer_kfree_skb_list
;
90 defer_kfree_skb_list
= NULL
;
92 mutex_unlock(&rtnl_mutex
);
95 struct sk_buff
*next
= head
->next
;
103 void rtnl_unlock(void)
105 /* This fellow will unlock it for us. */
108 EXPORT_SYMBOL(rtnl_unlock
);
110 int rtnl_trylock(void)
112 return mutex_trylock(&rtnl_mutex
);
114 EXPORT_SYMBOL(rtnl_trylock
);
116 int rtnl_is_locked(void)
118 return mutex_is_locked(&rtnl_mutex
);
120 EXPORT_SYMBOL(rtnl_is_locked
);
122 #ifdef CONFIG_PROVE_LOCKING
123 bool lockdep_rtnl_is_held(void)
125 return lockdep_is_held(&rtnl_mutex
);
127 EXPORT_SYMBOL(lockdep_rtnl_is_held
);
128 #endif /* #ifdef CONFIG_PROVE_LOCKING */
130 static struct rtnl_link __rcu
*rtnl_msg_handlers
[RTNL_FAMILY_MAX
+ 1];
131 static refcount_t rtnl_msg_handlers_ref
[RTNL_FAMILY_MAX
+ 1];
133 static inline int rtm_msgindex(int msgtype
)
135 int msgindex
= msgtype
- RTM_BASE
;
138 * msgindex < 0 implies someone tried to register a netlink
139 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
140 * the message type has not been added to linux/rtnetlink.h
142 BUG_ON(msgindex
< 0 || msgindex
>= RTM_NR_MSGTYPES
);
148 * __rtnl_register - Register a rtnetlink message type
149 * @protocol: Protocol family or PF_UNSPEC
150 * @msgtype: rtnetlink message type
151 * @doit: Function pointer called for each request message
152 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
153 * @flags: rtnl_link_flags to modifiy behaviour of doit/dumpit functions
155 * Registers the specified function pointers (at least one of them has
156 * to be non-NULL) to be called whenever a request message for the
157 * specified protocol family and message type is received.
159 * The special protocol family PF_UNSPEC may be used to define fallback
160 * function pointers for the case when no entry for the specific protocol
163 * Returns 0 on success or a negative error code.
165 int __rtnl_register(int protocol
, int msgtype
,
166 rtnl_doit_func doit
, rtnl_dumpit_func dumpit
,
169 struct rtnl_link
*tab
;
172 BUG_ON(protocol
< 0 || protocol
> RTNL_FAMILY_MAX
);
173 msgindex
= rtm_msgindex(msgtype
);
175 tab
= rcu_dereference_raw(rtnl_msg_handlers
[protocol
]);
177 tab
= kcalloc(RTM_NR_MSGTYPES
, sizeof(*tab
), GFP_KERNEL
);
181 rcu_assign_pointer(rtnl_msg_handlers
[protocol
], tab
);
185 tab
[msgindex
].doit
= doit
;
187 tab
[msgindex
].dumpit
= dumpit
;
188 tab
[msgindex
].flags
|= flags
;
192 EXPORT_SYMBOL_GPL(__rtnl_register
);
195 * rtnl_register - Register a rtnetlink message type
197 * Identical to __rtnl_register() but panics on failure. This is useful
198 * as failure of this function is very unlikely, it can only happen due
199 * to lack of memory when allocating the chain to store all message
200 * handlers for a protocol. Meant for use in init functions where lack
201 * of memory implies no sense in continuing.
203 void rtnl_register(int protocol
, int msgtype
,
204 rtnl_doit_func doit
, rtnl_dumpit_func dumpit
,
207 if (__rtnl_register(protocol
, msgtype
, doit
, dumpit
, flags
) < 0)
208 panic("Unable to register rtnetlink message handler, "
209 "protocol = %d, message type = %d\n",
212 EXPORT_SYMBOL_GPL(rtnl_register
);
215 * rtnl_unregister - Unregister a rtnetlink message type
216 * @protocol: Protocol family or PF_UNSPEC
217 * @msgtype: rtnetlink message type
219 * Returns 0 on success or a negative error code.
221 int rtnl_unregister(int protocol
, int msgtype
)
223 struct rtnl_link
*handlers
;
226 BUG_ON(protocol
< 0 || protocol
> RTNL_FAMILY_MAX
);
227 msgindex
= rtm_msgindex(msgtype
);
230 handlers
= rtnl_dereference(rtnl_msg_handlers
[protocol
]);
236 handlers
[msgindex
].doit
= NULL
;
237 handlers
[msgindex
].dumpit
= NULL
;
238 handlers
[msgindex
].flags
= 0;
243 EXPORT_SYMBOL_GPL(rtnl_unregister
);
246 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
247 * @protocol : Protocol family or PF_UNSPEC
249 * Identical to calling rtnl_unregster() for all registered message types
250 * of a certain protocol family.
252 void rtnl_unregister_all(int protocol
)
254 struct rtnl_link
*handlers
;
256 BUG_ON(protocol
< 0 || protocol
> RTNL_FAMILY_MAX
);
259 handlers
= rtnl_dereference(rtnl_msg_handlers
[protocol
]);
260 RCU_INIT_POINTER(rtnl_msg_handlers
[protocol
], NULL
);
265 while (refcount_read(&rtnl_msg_handlers_ref
[protocol
]) > 1)
269 EXPORT_SYMBOL_GPL(rtnl_unregister_all
);
271 static LIST_HEAD(link_ops
);
273 static const struct rtnl_link_ops
*rtnl_link_ops_get(const char *kind
)
275 const struct rtnl_link_ops
*ops
;
277 list_for_each_entry(ops
, &link_ops
, list
) {
278 if (!strcmp(ops
->kind
, kind
))
285 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
286 * @ops: struct rtnl_link_ops * to register
288 * The caller must hold the rtnl_mutex. This function should be used
289 * by drivers that create devices during module initialization. It
290 * must be called before registering the devices.
292 * Returns 0 on success or a negative error code.
294 int __rtnl_link_register(struct rtnl_link_ops
*ops
)
296 if (rtnl_link_ops_get(ops
->kind
))
299 /* The check for setup is here because if ops
300 * does not have that filled up, it is not possible
301 * to use the ops for creating device. So do not
302 * fill up dellink as well. That disables rtnl_dellink.
304 if (ops
->setup
&& !ops
->dellink
)
305 ops
->dellink
= unregister_netdevice_queue
;
307 list_add_tail(&ops
->list
, &link_ops
);
310 EXPORT_SYMBOL_GPL(__rtnl_link_register
);
313 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
314 * @ops: struct rtnl_link_ops * to register
316 * Returns 0 on success or a negative error code.
318 int rtnl_link_register(struct rtnl_link_ops
*ops
)
323 err
= __rtnl_link_register(ops
);
327 EXPORT_SYMBOL_GPL(rtnl_link_register
);
329 static void __rtnl_kill_links(struct net
*net
, struct rtnl_link_ops
*ops
)
331 struct net_device
*dev
;
332 LIST_HEAD(list_kill
);
334 for_each_netdev(net
, dev
) {
335 if (dev
->rtnl_link_ops
== ops
)
336 ops
->dellink(dev
, &list_kill
);
338 unregister_netdevice_many(&list_kill
);
342 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
343 * @ops: struct rtnl_link_ops * to unregister
345 * The caller must hold the rtnl_mutex.
347 void __rtnl_link_unregister(struct rtnl_link_ops
*ops
)
352 __rtnl_kill_links(net
, ops
);
354 list_del(&ops
->list
);
356 EXPORT_SYMBOL_GPL(__rtnl_link_unregister
);
358 /* Return with the rtnl_lock held when there are no network
359 * devices unregistering in any network namespace.
361 static void rtnl_lock_unregistering_all(void)
365 DEFINE_WAIT_FUNC(wait
, woken_wake_function
);
367 add_wait_queue(&netdev_unregistering_wq
, &wait
);
369 unregistering
= false;
372 if (net
->dev_unreg_count
> 0) {
373 unregistering
= true;
381 wait_woken(&wait
, TASK_UNINTERRUPTIBLE
, MAX_SCHEDULE_TIMEOUT
);
383 remove_wait_queue(&netdev_unregistering_wq
, &wait
);
387 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
388 * @ops: struct rtnl_link_ops * to unregister
390 void rtnl_link_unregister(struct rtnl_link_ops
*ops
)
392 /* Close the race with cleanup_net() */
393 mutex_lock(&net_mutex
);
394 rtnl_lock_unregistering_all();
395 __rtnl_link_unregister(ops
);
397 mutex_unlock(&net_mutex
);
399 EXPORT_SYMBOL_GPL(rtnl_link_unregister
);
401 static size_t rtnl_link_get_slave_info_data_size(const struct net_device
*dev
)
403 struct net_device
*master_dev
;
404 const struct rtnl_link_ops
*ops
;
409 master_dev
= netdev_master_upper_dev_get_rcu((struct net_device
*)dev
);
413 ops
= master_dev
->rtnl_link_ops
;
414 if (!ops
|| !ops
->get_slave_size
)
416 /* IFLA_INFO_SLAVE_DATA + nested data */
417 size
= nla_total_size(sizeof(struct nlattr
)) +
418 ops
->get_slave_size(master_dev
, dev
);
425 static size_t rtnl_link_get_size(const struct net_device
*dev
)
427 const struct rtnl_link_ops
*ops
= dev
->rtnl_link_ops
;
433 size
= nla_total_size(sizeof(struct nlattr
)) + /* IFLA_LINKINFO */
434 nla_total_size(strlen(ops
->kind
) + 1); /* IFLA_INFO_KIND */
437 /* IFLA_INFO_DATA + nested data */
438 size
+= nla_total_size(sizeof(struct nlattr
)) +
441 if (ops
->get_xstats_size
)
442 /* IFLA_INFO_XSTATS */
443 size
+= nla_total_size(ops
->get_xstats_size(dev
));
445 size
+= rtnl_link_get_slave_info_data_size(dev
);
450 static LIST_HEAD(rtnl_af_ops
);
452 static const struct rtnl_af_ops
*rtnl_af_lookup(const int family
)
454 const struct rtnl_af_ops
*ops
;
456 list_for_each_entry_rcu(ops
, &rtnl_af_ops
, list
) {
457 if (ops
->family
== family
)
465 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
466 * @ops: struct rtnl_af_ops * to register
468 * Returns 0 on success or a negative error code.
470 void rtnl_af_register(struct rtnl_af_ops
*ops
)
473 list_add_tail_rcu(&ops
->list
, &rtnl_af_ops
);
476 EXPORT_SYMBOL_GPL(rtnl_af_register
);
479 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
480 * @ops: struct rtnl_af_ops * to unregister
482 void rtnl_af_unregister(struct rtnl_af_ops
*ops
)
485 list_del_rcu(&ops
->list
);
490 EXPORT_SYMBOL_GPL(rtnl_af_unregister
);
492 static size_t rtnl_link_get_af_size(const struct net_device
*dev
,
495 struct rtnl_af_ops
*af_ops
;
499 size
= nla_total_size(sizeof(struct nlattr
));
502 list_for_each_entry_rcu(af_ops
, &rtnl_af_ops
, list
) {
503 if (af_ops
->get_link_af_size
) {
504 /* AF_* + nested data */
505 size
+= nla_total_size(sizeof(struct nlattr
)) +
506 af_ops
->get_link_af_size(dev
, ext_filter_mask
);
514 static bool rtnl_have_link_slave_info(const struct net_device
*dev
)
516 struct net_device
*master_dev
;
521 master_dev
= netdev_master_upper_dev_get_rcu((struct net_device
*)dev
);
522 if (master_dev
&& master_dev
->rtnl_link_ops
)
528 static int rtnl_link_slave_info_fill(struct sk_buff
*skb
,
529 const struct net_device
*dev
)
531 struct net_device
*master_dev
;
532 const struct rtnl_link_ops
*ops
;
533 struct nlattr
*slave_data
;
536 master_dev
= netdev_master_upper_dev_get((struct net_device
*) dev
);
539 ops
= master_dev
->rtnl_link_ops
;
542 if (nla_put_string(skb
, IFLA_INFO_SLAVE_KIND
, ops
->kind
) < 0)
544 if (ops
->fill_slave_info
) {
545 slave_data
= nla_nest_start(skb
, IFLA_INFO_SLAVE_DATA
);
548 err
= ops
->fill_slave_info(skb
, master_dev
, dev
);
550 goto err_cancel_slave_data
;
551 nla_nest_end(skb
, slave_data
);
555 err_cancel_slave_data
:
556 nla_nest_cancel(skb
, slave_data
);
560 static int rtnl_link_info_fill(struct sk_buff
*skb
,
561 const struct net_device
*dev
)
563 const struct rtnl_link_ops
*ops
= dev
->rtnl_link_ops
;
569 if (nla_put_string(skb
, IFLA_INFO_KIND
, ops
->kind
) < 0)
571 if (ops
->fill_xstats
) {
572 err
= ops
->fill_xstats(skb
, dev
);
576 if (ops
->fill_info
) {
577 data
= nla_nest_start(skb
, IFLA_INFO_DATA
);
580 err
= ops
->fill_info(skb
, dev
);
582 goto err_cancel_data
;
583 nla_nest_end(skb
, data
);
588 nla_nest_cancel(skb
, data
);
592 static int rtnl_link_fill(struct sk_buff
*skb
, const struct net_device
*dev
)
594 struct nlattr
*linkinfo
;
597 linkinfo
= nla_nest_start(skb
, IFLA_LINKINFO
);
598 if (linkinfo
== NULL
)
601 err
= rtnl_link_info_fill(skb
, dev
);
603 goto err_cancel_link
;
605 err
= rtnl_link_slave_info_fill(skb
, dev
);
607 goto err_cancel_link
;
609 nla_nest_end(skb
, linkinfo
);
613 nla_nest_cancel(skb
, linkinfo
);
618 int rtnetlink_send(struct sk_buff
*skb
, struct net
*net
, u32 pid
, unsigned int group
, int echo
)
620 struct sock
*rtnl
= net
->rtnl
;
623 NETLINK_CB(skb
).dst_group
= group
;
625 refcount_inc(&skb
->users
);
626 netlink_broadcast(rtnl
, skb
, pid
, group
, GFP_KERNEL
);
628 err
= netlink_unicast(rtnl
, skb
, pid
, MSG_DONTWAIT
);
632 int rtnl_unicast(struct sk_buff
*skb
, struct net
*net
, u32 pid
)
634 struct sock
*rtnl
= net
->rtnl
;
636 return nlmsg_unicast(rtnl
, skb
, pid
);
638 EXPORT_SYMBOL(rtnl_unicast
);
640 void rtnl_notify(struct sk_buff
*skb
, struct net
*net
, u32 pid
, u32 group
,
641 struct nlmsghdr
*nlh
, gfp_t flags
)
643 struct sock
*rtnl
= net
->rtnl
;
647 report
= nlmsg_report(nlh
);
649 nlmsg_notify(rtnl
, skb
, pid
, group
, report
, flags
);
651 EXPORT_SYMBOL(rtnl_notify
);
653 void rtnl_set_sk_err(struct net
*net
, u32 group
, int error
)
655 struct sock
*rtnl
= net
->rtnl
;
657 netlink_set_err(rtnl
, 0, group
, error
);
659 EXPORT_SYMBOL(rtnl_set_sk_err
);
661 int rtnetlink_put_metrics(struct sk_buff
*skb
, u32
*metrics
)
666 mx
= nla_nest_start(skb
, RTA_METRICS
);
670 for (i
= 0; i
< RTAX_MAX
; i
++) {
672 if (i
== RTAX_CC_ALGO
- 1) {
673 char tmp
[TCP_CA_NAME_MAX
], *name
;
675 name
= tcp_ca_get_name_by_key(metrics
[i
], tmp
);
678 if (nla_put_string(skb
, i
+ 1, name
))
679 goto nla_put_failure
;
680 } else if (i
== RTAX_FEATURES
- 1) {
681 u32 user_features
= metrics
[i
] & RTAX_FEATURE_MASK
;
685 BUILD_BUG_ON(RTAX_FEATURE_MASK
& DST_FEATURE_MASK
);
686 if (nla_put_u32(skb
, i
+ 1, user_features
))
687 goto nla_put_failure
;
689 if (nla_put_u32(skb
, i
+ 1, metrics
[i
]))
690 goto nla_put_failure
;
697 nla_nest_cancel(skb
, mx
);
701 return nla_nest_end(skb
, mx
);
704 nla_nest_cancel(skb
, mx
);
707 EXPORT_SYMBOL(rtnetlink_put_metrics
);
709 int rtnl_put_cacheinfo(struct sk_buff
*skb
, struct dst_entry
*dst
, u32 id
,
710 long expires
, u32 error
)
712 struct rta_cacheinfo ci
= {
713 .rta_lastuse
= jiffies_delta_to_clock_t(jiffies
- dst
->lastuse
),
714 .rta_used
= dst
->__use
,
715 .rta_clntref
= atomic_read(&(dst
->__refcnt
)),
723 clock
= jiffies_to_clock_t(abs(expires
));
724 clock
= min_t(unsigned long, clock
, INT_MAX
);
725 ci
.rta_expires
= (expires
> 0) ? clock
: -clock
;
727 return nla_put(skb
, RTA_CACHEINFO
, sizeof(ci
), &ci
);
729 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo
);
731 static void set_operstate(struct net_device
*dev
, unsigned char transition
)
733 unsigned char operstate
= dev
->operstate
;
735 switch (transition
) {
737 if ((operstate
== IF_OPER_DORMANT
||
738 operstate
== IF_OPER_UNKNOWN
) &&
740 operstate
= IF_OPER_UP
;
743 case IF_OPER_DORMANT
:
744 if (operstate
== IF_OPER_UP
||
745 operstate
== IF_OPER_UNKNOWN
)
746 operstate
= IF_OPER_DORMANT
;
750 if (dev
->operstate
!= operstate
) {
751 write_lock_bh(&dev_base_lock
);
752 dev
->operstate
= operstate
;
753 write_unlock_bh(&dev_base_lock
);
754 netdev_state_change(dev
);
758 static unsigned int rtnl_dev_get_flags(const struct net_device
*dev
)
760 return (dev
->flags
& ~(IFF_PROMISC
| IFF_ALLMULTI
)) |
761 (dev
->gflags
& (IFF_PROMISC
| IFF_ALLMULTI
));
764 static unsigned int rtnl_dev_combine_flags(const struct net_device
*dev
,
765 const struct ifinfomsg
*ifm
)
767 unsigned int flags
= ifm
->ifi_flags
;
769 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
771 flags
= (flags
& ifm
->ifi_change
) |
772 (rtnl_dev_get_flags(dev
) & ~ifm
->ifi_change
);
777 static void copy_rtnl_link_stats(struct rtnl_link_stats
*a
,
778 const struct rtnl_link_stats64
*b
)
780 a
->rx_packets
= b
->rx_packets
;
781 a
->tx_packets
= b
->tx_packets
;
782 a
->rx_bytes
= b
->rx_bytes
;
783 a
->tx_bytes
= b
->tx_bytes
;
784 a
->rx_errors
= b
->rx_errors
;
785 a
->tx_errors
= b
->tx_errors
;
786 a
->rx_dropped
= b
->rx_dropped
;
787 a
->tx_dropped
= b
->tx_dropped
;
789 a
->multicast
= b
->multicast
;
790 a
->collisions
= b
->collisions
;
792 a
->rx_length_errors
= b
->rx_length_errors
;
793 a
->rx_over_errors
= b
->rx_over_errors
;
794 a
->rx_crc_errors
= b
->rx_crc_errors
;
795 a
->rx_frame_errors
= b
->rx_frame_errors
;
796 a
->rx_fifo_errors
= b
->rx_fifo_errors
;
797 a
->rx_missed_errors
= b
->rx_missed_errors
;
799 a
->tx_aborted_errors
= b
->tx_aborted_errors
;
800 a
->tx_carrier_errors
= b
->tx_carrier_errors
;
801 a
->tx_fifo_errors
= b
->tx_fifo_errors
;
802 a
->tx_heartbeat_errors
= b
->tx_heartbeat_errors
;
803 a
->tx_window_errors
= b
->tx_window_errors
;
805 a
->rx_compressed
= b
->rx_compressed
;
806 a
->tx_compressed
= b
->tx_compressed
;
808 a
->rx_nohandler
= b
->rx_nohandler
;
812 static inline int rtnl_vfinfo_size(const struct net_device
*dev
,
815 if (dev
->dev
.parent
&& (ext_filter_mask
& RTEXT_FILTER_VF
)) {
816 int num_vfs
= dev_num_vf(dev
->dev
.parent
);
817 size_t size
= nla_total_size(0);
820 nla_total_size(sizeof(struct ifla_vf_mac
)) +
821 nla_total_size(sizeof(struct ifla_vf_vlan
)) +
822 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */
823 nla_total_size(MAX_VLAN_LIST_LEN
*
824 sizeof(struct ifla_vf_vlan_info
)) +
825 nla_total_size(sizeof(struct ifla_vf_spoofchk
)) +
826 nla_total_size(sizeof(struct ifla_vf_tx_rate
)) +
827 nla_total_size(sizeof(struct ifla_vf_rate
)) +
828 nla_total_size(sizeof(struct ifla_vf_link_state
)) +
829 nla_total_size(sizeof(struct ifla_vf_rss_query_en
)) +
830 nla_total_size(0) + /* nest IFLA_VF_STATS */
831 /* IFLA_VF_STATS_RX_PACKETS */
832 nla_total_size_64bit(sizeof(__u64
)) +
833 /* IFLA_VF_STATS_TX_PACKETS */
834 nla_total_size_64bit(sizeof(__u64
)) +
835 /* IFLA_VF_STATS_RX_BYTES */
836 nla_total_size_64bit(sizeof(__u64
)) +
837 /* IFLA_VF_STATS_TX_BYTES */
838 nla_total_size_64bit(sizeof(__u64
)) +
839 /* IFLA_VF_STATS_BROADCAST */
840 nla_total_size_64bit(sizeof(__u64
)) +
841 /* IFLA_VF_STATS_MULTICAST */
842 nla_total_size_64bit(sizeof(__u64
)) +
843 nla_total_size(sizeof(struct ifla_vf_trust
)));
849 static size_t rtnl_port_size(const struct net_device
*dev
,
852 size_t port_size
= nla_total_size(4) /* PORT_VF */
853 + nla_total_size(PORT_PROFILE_MAX
) /* PORT_PROFILE */
854 + nla_total_size(PORT_UUID_MAX
) /* PORT_INSTANCE_UUID */
855 + nla_total_size(PORT_UUID_MAX
) /* PORT_HOST_UUID */
856 + nla_total_size(1) /* PROT_VDP_REQUEST */
857 + nla_total_size(2); /* PORT_VDP_RESPONSE */
858 size_t vf_ports_size
= nla_total_size(sizeof(struct nlattr
));
859 size_t vf_port_size
= nla_total_size(sizeof(struct nlattr
))
861 size_t port_self_size
= nla_total_size(sizeof(struct nlattr
))
864 if (!dev
->netdev_ops
->ndo_get_vf_port
|| !dev
->dev
.parent
||
865 !(ext_filter_mask
& RTEXT_FILTER_VF
))
867 if (dev_num_vf(dev
->dev
.parent
))
868 return port_self_size
+ vf_ports_size
+
869 vf_port_size
* dev_num_vf(dev
->dev
.parent
);
871 return port_self_size
;
874 static size_t rtnl_xdp_size(void)
876 size_t xdp_size
= nla_total_size(0) + /* nest IFLA_XDP */
877 nla_total_size(1) + /* XDP_ATTACHED */
878 nla_total_size(4); /* XDP_PROG_ID */
883 static noinline
size_t if_nlmsg_size(const struct net_device
*dev
,
886 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
887 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
888 + nla_total_size(IFALIASZ
) /* IFLA_IFALIAS */
889 + nla_total_size(IFNAMSIZ
) /* IFLA_QDISC */
890 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap
))
891 + nla_total_size(sizeof(struct rtnl_link_stats
))
892 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64
))
893 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
894 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_BROADCAST */
895 + nla_total_size(4) /* IFLA_TXQLEN */
896 + nla_total_size(4) /* IFLA_WEIGHT */
897 + nla_total_size(4) /* IFLA_MTU */
898 + nla_total_size(4) /* IFLA_LINK */
899 + nla_total_size(4) /* IFLA_MASTER */
900 + nla_total_size(1) /* IFLA_CARRIER */
901 + nla_total_size(4) /* IFLA_PROMISCUITY */
902 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
903 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
904 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
905 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
906 + nla_total_size(1) /* IFLA_OPERSTATE */
907 + nla_total_size(1) /* IFLA_LINKMODE */
908 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
909 + nla_total_size(4) /* IFLA_LINK_NETNSID */
910 + nla_total_size(4) /* IFLA_GROUP */
911 + nla_total_size(ext_filter_mask
912 & RTEXT_FILTER_VF
? 4 : 0) /* IFLA_NUM_VF */
913 + rtnl_vfinfo_size(dev
, ext_filter_mask
) /* IFLA_VFINFO_LIST */
914 + rtnl_port_size(dev
, ext_filter_mask
) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
915 + rtnl_link_get_size(dev
) /* IFLA_LINKINFO */
916 + rtnl_link_get_af_size(dev
, ext_filter_mask
) /* IFLA_AF_SPEC */
917 + nla_total_size(MAX_PHYS_ITEM_ID_LEN
) /* IFLA_PHYS_PORT_ID */
918 + nla_total_size(MAX_PHYS_ITEM_ID_LEN
) /* IFLA_PHYS_SWITCH_ID */
919 + nla_total_size(IFNAMSIZ
) /* IFLA_PHYS_PORT_NAME */
920 + rtnl_xdp_size() /* IFLA_XDP */
921 + nla_total_size(4) /* IFLA_EVENT */
922 + nla_total_size(4) /* IFLA_NEW_NETNSID */
923 + nla_total_size(4) /* IFLA_NEW_IFINDEX */
924 + nla_total_size(1) /* IFLA_PROTO_DOWN */
925 + nla_total_size(4) /* IFLA_IF_NETNSID */
926 + nla_total_size(4) /* IFLA_CARRIER_UP_COUNT */
927 + nla_total_size(4) /* IFLA_CARRIER_DOWN_COUNT */
931 static int rtnl_vf_ports_fill(struct sk_buff
*skb
, struct net_device
*dev
)
933 struct nlattr
*vf_ports
;
934 struct nlattr
*vf_port
;
938 vf_ports
= nla_nest_start(skb
, IFLA_VF_PORTS
);
942 for (vf
= 0; vf
< dev_num_vf(dev
->dev
.parent
); vf
++) {
943 vf_port
= nla_nest_start(skb
, IFLA_VF_PORT
);
945 goto nla_put_failure
;
946 if (nla_put_u32(skb
, IFLA_PORT_VF
, vf
))
947 goto nla_put_failure
;
948 err
= dev
->netdev_ops
->ndo_get_vf_port(dev
, vf
, skb
);
949 if (err
== -EMSGSIZE
)
950 goto nla_put_failure
;
952 nla_nest_cancel(skb
, vf_port
);
955 nla_nest_end(skb
, vf_port
);
958 nla_nest_end(skb
, vf_ports
);
963 nla_nest_cancel(skb
, vf_ports
);
967 static int rtnl_port_self_fill(struct sk_buff
*skb
, struct net_device
*dev
)
969 struct nlattr
*port_self
;
972 port_self
= nla_nest_start(skb
, IFLA_PORT_SELF
);
976 err
= dev
->netdev_ops
->ndo_get_vf_port(dev
, PORT_SELF_VF
, skb
);
978 nla_nest_cancel(skb
, port_self
);
979 return (err
== -EMSGSIZE
) ? err
: 0;
982 nla_nest_end(skb
, port_self
);
987 static int rtnl_port_fill(struct sk_buff
*skb
, struct net_device
*dev
,
992 if (!dev
->netdev_ops
->ndo_get_vf_port
|| !dev
->dev
.parent
||
993 !(ext_filter_mask
& RTEXT_FILTER_VF
))
996 err
= rtnl_port_self_fill(skb
, dev
);
1000 if (dev_num_vf(dev
->dev
.parent
)) {
1001 err
= rtnl_vf_ports_fill(skb
, dev
);
1009 static int rtnl_phys_port_id_fill(struct sk_buff
*skb
, struct net_device
*dev
)
1012 struct netdev_phys_item_id ppid
;
1014 err
= dev_get_phys_port_id(dev
, &ppid
);
1016 if (err
== -EOPNOTSUPP
)
1021 if (nla_put(skb
, IFLA_PHYS_PORT_ID
, ppid
.id_len
, ppid
.id
))
1027 static int rtnl_phys_port_name_fill(struct sk_buff
*skb
, struct net_device
*dev
)
1029 char name
[IFNAMSIZ
];
1032 err
= dev_get_phys_port_name(dev
, name
, sizeof(name
));
1034 if (err
== -EOPNOTSUPP
)
1039 if (nla_put_string(skb
, IFLA_PHYS_PORT_NAME
, name
))
1045 static int rtnl_phys_switch_id_fill(struct sk_buff
*skb
, struct net_device
*dev
)
1048 struct switchdev_attr attr
= {
1050 .id
= SWITCHDEV_ATTR_ID_PORT_PARENT_ID
,
1051 .flags
= SWITCHDEV_F_NO_RECURSE
,
1054 err
= switchdev_port_attr_get(dev
, &attr
);
1056 if (err
== -EOPNOTSUPP
)
1061 if (nla_put(skb
, IFLA_PHYS_SWITCH_ID
, attr
.u
.ppid
.id_len
,
1068 static noinline_for_stack
int rtnl_fill_stats(struct sk_buff
*skb
,
1069 struct net_device
*dev
)
1071 struct rtnl_link_stats64
*sp
;
1072 struct nlattr
*attr
;
1074 attr
= nla_reserve_64bit(skb
, IFLA_STATS64
,
1075 sizeof(struct rtnl_link_stats64
), IFLA_PAD
);
1079 sp
= nla_data(attr
);
1080 dev_get_stats(dev
, sp
);
1082 attr
= nla_reserve(skb
, IFLA_STATS
,
1083 sizeof(struct rtnl_link_stats
));
1087 copy_rtnl_link_stats(nla_data(attr
), sp
);
1092 static noinline_for_stack
int rtnl_fill_vfinfo(struct sk_buff
*skb
,
1093 struct net_device
*dev
,
1095 struct nlattr
*vfinfo
)
1097 struct ifla_vf_rss_query_en vf_rss_query_en
;
1098 struct nlattr
*vf
, *vfstats
, *vfvlanlist
;
1099 struct ifla_vf_link_state vf_linkstate
;
1100 struct ifla_vf_vlan_info vf_vlan_info
;
1101 struct ifla_vf_spoofchk vf_spoofchk
;
1102 struct ifla_vf_tx_rate vf_tx_rate
;
1103 struct ifla_vf_stats vf_stats
;
1104 struct ifla_vf_trust vf_trust
;
1105 struct ifla_vf_vlan vf_vlan
;
1106 struct ifla_vf_rate vf_rate
;
1107 struct ifla_vf_mac vf_mac
;
1108 struct ifla_vf_info ivi
;
1110 memset(&ivi
, 0, sizeof(ivi
));
1112 /* Not all SR-IOV capable drivers support the
1113 * spoofcheck and "RSS query enable" query. Preset to
1114 * -1 so the user space tool can detect that the driver
1115 * didn't report anything.
1118 ivi
.rss_query_en
= -1;
1120 /* The default value for VF link state is "auto"
1121 * IFLA_VF_LINK_STATE_AUTO which equals zero
1124 /* VLAN Protocol by default is 802.1Q */
1125 ivi
.vlan_proto
= htons(ETH_P_8021Q
);
1126 if (dev
->netdev_ops
->ndo_get_vf_config(dev
, vfs_num
, &ivi
))
1129 memset(&vf_vlan_info
, 0, sizeof(vf_vlan_info
));
1138 vf_rss_query_en
.vf
=
1139 vf_trust
.vf
= ivi
.vf
;
1141 memcpy(vf_mac
.mac
, ivi
.mac
, sizeof(ivi
.mac
));
1142 vf_vlan
.vlan
= ivi
.vlan
;
1143 vf_vlan
.qos
= ivi
.qos
;
1144 vf_vlan_info
.vlan
= ivi
.vlan
;
1145 vf_vlan_info
.qos
= ivi
.qos
;
1146 vf_vlan_info
.vlan_proto
= ivi
.vlan_proto
;
1147 vf_tx_rate
.rate
= ivi
.max_tx_rate
;
1148 vf_rate
.min_tx_rate
= ivi
.min_tx_rate
;
1149 vf_rate
.max_tx_rate
= ivi
.max_tx_rate
;
1150 vf_spoofchk
.setting
= ivi
.spoofchk
;
1151 vf_linkstate
.link_state
= ivi
.linkstate
;
1152 vf_rss_query_en
.setting
= ivi
.rss_query_en
;
1153 vf_trust
.setting
= ivi
.trusted
;
1154 vf
= nla_nest_start(skb
, IFLA_VF_INFO
);
1156 goto nla_put_vfinfo_failure
;
1157 if (nla_put(skb
, IFLA_VF_MAC
, sizeof(vf_mac
), &vf_mac
) ||
1158 nla_put(skb
, IFLA_VF_VLAN
, sizeof(vf_vlan
), &vf_vlan
) ||
1159 nla_put(skb
, IFLA_VF_RATE
, sizeof(vf_rate
),
1161 nla_put(skb
, IFLA_VF_TX_RATE
, sizeof(vf_tx_rate
),
1163 nla_put(skb
, IFLA_VF_SPOOFCHK
, sizeof(vf_spoofchk
),
1165 nla_put(skb
, IFLA_VF_LINK_STATE
, sizeof(vf_linkstate
),
1167 nla_put(skb
, IFLA_VF_RSS_QUERY_EN
,
1168 sizeof(vf_rss_query_en
),
1169 &vf_rss_query_en
) ||
1170 nla_put(skb
, IFLA_VF_TRUST
,
1171 sizeof(vf_trust
), &vf_trust
))
1172 goto nla_put_vf_failure
;
1173 vfvlanlist
= nla_nest_start(skb
, IFLA_VF_VLAN_LIST
);
1175 goto nla_put_vf_failure
;
1176 if (nla_put(skb
, IFLA_VF_VLAN_INFO
, sizeof(vf_vlan_info
),
1178 nla_nest_cancel(skb
, vfvlanlist
);
1179 goto nla_put_vf_failure
;
1181 nla_nest_end(skb
, vfvlanlist
);
1182 memset(&vf_stats
, 0, sizeof(vf_stats
));
1183 if (dev
->netdev_ops
->ndo_get_vf_stats
)
1184 dev
->netdev_ops
->ndo_get_vf_stats(dev
, vfs_num
,
1186 vfstats
= nla_nest_start(skb
, IFLA_VF_STATS
);
1188 goto nla_put_vf_failure
;
1189 if (nla_put_u64_64bit(skb
, IFLA_VF_STATS_RX_PACKETS
,
1190 vf_stats
.rx_packets
, IFLA_VF_STATS_PAD
) ||
1191 nla_put_u64_64bit(skb
, IFLA_VF_STATS_TX_PACKETS
,
1192 vf_stats
.tx_packets
, IFLA_VF_STATS_PAD
) ||
1193 nla_put_u64_64bit(skb
, IFLA_VF_STATS_RX_BYTES
,
1194 vf_stats
.rx_bytes
, IFLA_VF_STATS_PAD
) ||
1195 nla_put_u64_64bit(skb
, IFLA_VF_STATS_TX_BYTES
,
1196 vf_stats
.tx_bytes
, IFLA_VF_STATS_PAD
) ||
1197 nla_put_u64_64bit(skb
, IFLA_VF_STATS_BROADCAST
,
1198 vf_stats
.broadcast
, IFLA_VF_STATS_PAD
) ||
1199 nla_put_u64_64bit(skb
, IFLA_VF_STATS_MULTICAST
,
1200 vf_stats
.multicast
, IFLA_VF_STATS_PAD
)) {
1201 nla_nest_cancel(skb
, vfstats
);
1202 goto nla_put_vf_failure
;
1204 nla_nest_end(skb
, vfstats
);
1205 nla_nest_end(skb
, vf
);
1209 nla_nest_cancel(skb
, vf
);
1210 nla_put_vfinfo_failure
:
1211 nla_nest_cancel(skb
, vfinfo
);
1215 static noinline_for_stack
int rtnl_fill_vf(struct sk_buff
*skb
,
1216 struct net_device
*dev
,
1217 u32 ext_filter_mask
)
1219 struct nlattr
*vfinfo
;
1222 if (!dev
->dev
.parent
|| ((ext_filter_mask
& RTEXT_FILTER_VF
) == 0))
1225 num_vfs
= dev_num_vf(dev
->dev
.parent
);
1226 if (nla_put_u32(skb
, IFLA_NUM_VF
, num_vfs
))
1229 if (!dev
->netdev_ops
->ndo_get_vf_config
)
1232 vfinfo
= nla_nest_start(skb
, IFLA_VFINFO_LIST
);
1236 for (i
= 0; i
< num_vfs
; i
++) {
1237 if (rtnl_fill_vfinfo(skb
, dev
, i
, vfinfo
))
1241 nla_nest_end(skb
, vfinfo
);
1245 static int rtnl_fill_link_ifmap(struct sk_buff
*skb
, struct net_device
*dev
)
1247 struct rtnl_link_ifmap map
;
1249 memset(&map
, 0, sizeof(map
));
1250 map
.mem_start
= dev
->mem_start
;
1251 map
.mem_end
= dev
->mem_end
;
1252 map
.base_addr
= dev
->base_addr
;
1255 map
.port
= dev
->if_port
;
1257 if (nla_put_64bit(skb
, IFLA_MAP
, sizeof(map
), &map
, IFLA_PAD
))
1263 static u8
rtnl_xdp_attached_mode(struct net_device
*dev
, u32
*prog_id
)
1265 const struct net_device_ops
*ops
= dev
->netdev_ops
;
1266 const struct bpf_prog
*generic_xdp_prog
;
1271 generic_xdp_prog
= rtnl_dereference(dev
->xdp_prog
);
1272 if (generic_xdp_prog
) {
1273 *prog_id
= generic_xdp_prog
->aux
->id
;
1274 return XDP_ATTACHED_SKB
;
1277 return XDP_ATTACHED_NONE
;
1279 return __dev_xdp_attached(dev
, ops
->ndo_bpf
, prog_id
);
1282 static int rtnl_xdp_fill(struct sk_buff
*skb
, struct net_device
*dev
)
1288 xdp
= nla_nest_start(skb
, IFLA_XDP
);
1292 err
= nla_put_u8(skb
, IFLA_XDP_ATTACHED
,
1293 rtnl_xdp_attached_mode(dev
, &prog_id
));
1298 err
= nla_put_u32(skb
, IFLA_XDP_PROG_ID
, prog_id
);
1303 nla_nest_end(skb
, xdp
);
1307 nla_nest_cancel(skb
, xdp
);
1311 static u32
rtnl_get_event(unsigned long event
)
1313 u32 rtnl_event_type
= IFLA_EVENT_NONE
;
1317 rtnl_event_type
= IFLA_EVENT_REBOOT
;
1319 case NETDEV_FEAT_CHANGE
:
1320 rtnl_event_type
= IFLA_EVENT_FEATURES
;
1322 case NETDEV_BONDING_FAILOVER
:
1323 rtnl_event_type
= IFLA_EVENT_BONDING_FAILOVER
;
1325 case NETDEV_NOTIFY_PEERS
:
1326 rtnl_event_type
= IFLA_EVENT_NOTIFY_PEERS
;
1328 case NETDEV_RESEND_IGMP
:
1329 rtnl_event_type
= IFLA_EVENT_IGMP_RESEND
;
1331 case NETDEV_CHANGEINFODATA
:
1332 rtnl_event_type
= IFLA_EVENT_BONDING_OPTIONS
;
1338 return rtnl_event_type
;
1341 static int put_master_ifindex(struct sk_buff
*skb
, struct net_device
*dev
)
1343 const struct net_device
*upper_dev
;
1348 upper_dev
= netdev_master_upper_dev_get_rcu(dev
);
1350 ret
= nla_put_u32(skb
, IFLA_MASTER
, upper_dev
->ifindex
);
1356 static int nla_put_iflink(struct sk_buff
*skb
, const struct net_device
*dev
,
1359 int ifindex
= dev_get_iflink(dev
);
1361 if (force
|| dev
->ifindex
!= ifindex
)
1362 return nla_put_u32(skb
, IFLA_LINK
, ifindex
);
1367 static noinline_for_stack
int nla_put_ifalias(struct sk_buff
*skb
,
1368 struct net_device
*dev
)
1373 ret
= dev_get_alias(dev
, buf
, sizeof(buf
));
1374 return ret
> 0 ? nla_put_string(skb
, IFLA_IFALIAS
, buf
) : 0;
1377 static int rtnl_fill_link_netnsid(struct sk_buff
*skb
,
1378 const struct net_device
*dev
,
1379 struct net
*src_net
, gfp_t gfp
)
1381 bool put_iflink
= false;
1383 if (dev
->rtnl_link_ops
&& dev
->rtnl_link_ops
->get_link_net
) {
1384 struct net
*link_net
= dev
->rtnl_link_ops
->get_link_net(dev
);
1386 if (!net_eq(dev_net(dev
), link_net
)) {
1387 int id
= peernet2id_alloc(src_net
, link_net
, gfp
);
1389 if (nla_put_s32(skb
, IFLA_LINK_NETNSID
, id
))
1396 return nla_put_iflink(skb
, dev
, put_iflink
);
1399 static int rtnl_fill_link_af(struct sk_buff
*skb
,
1400 const struct net_device
*dev
,
1401 u32 ext_filter_mask
)
1403 const struct rtnl_af_ops
*af_ops
;
1404 struct nlattr
*af_spec
;
1406 af_spec
= nla_nest_start(skb
, IFLA_AF_SPEC
);
1410 list_for_each_entry_rcu(af_ops
, &rtnl_af_ops
, list
) {
1414 if (!af_ops
->fill_link_af
)
1417 af
= nla_nest_start(skb
, af_ops
->family
);
1421 err
= af_ops
->fill_link_af(skb
, dev
, ext_filter_mask
);
1423 * Caller may return ENODATA to indicate that there
1424 * was no data to be dumped. This is not an error, it
1425 * means we should trim the attribute header and
1428 if (err
== -ENODATA
)
1429 nla_nest_cancel(skb
, af
);
1433 nla_nest_end(skb
, af
);
1436 nla_nest_end(skb
, af_spec
);
1440 static int rtnl_fill_ifinfo(struct sk_buff
*skb
,
1441 struct net_device
*dev
, struct net
*src_net
,
1442 int type
, u32 pid
, u32 seq
, u32 change
,
1443 unsigned int flags
, u32 ext_filter_mask
,
1444 u32 event
, int *new_nsid
, int new_ifindex
,
1445 int tgt_netnsid
, gfp_t gfp
)
1447 struct ifinfomsg
*ifm
;
1448 struct nlmsghdr
*nlh
;
1451 nlh
= nlmsg_put(skb
, pid
, seq
, type
, sizeof(*ifm
), flags
);
1455 ifm
= nlmsg_data(nlh
);
1456 ifm
->ifi_family
= AF_UNSPEC
;
1458 ifm
->ifi_type
= dev
->type
;
1459 ifm
->ifi_index
= dev
->ifindex
;
1460 ifm
->ifi_flags
= dev_get_flags(dev
);
1461 ifm
->ifi_change
= change
;
1463 if (tgt_netnsid
>= 0 && nla_put_s32(skb
, IFLA_IF_NETNSID
, tgt_netnsid
))
1464 goto nla_put_failure
;
1466 if (nla_put_string(skb
, IFLA_IFNAME
, dev
->name
) ||
1467 nla_put_u32(skb
, IFLA_TXQLEN
, dev
->tx_queue_len
) ||
1468 nla_put_u8(skb
, IFLA_OPERSTATE
,
1469 netif_running(dev
) ? dev
->operstate
: IF_OPER_DOWN
) ||
1470 nla_put_u8(skb
, IFLA_LINKMODE
, dev
->link_mode
) ||
1471 nla_put_u32(skb
, IFLA_MTU
, dev
->mtu
) ||
1472 nla_put_u32(skb
, IFLA_GROUP
, dev
->group
) ||
1473 nla_put_u32(skb
, IFLA_PROMISCUITY
, dev
->promiscuity
) ||
1474 nla_put_u32(skb
, IFLA_NUM_TX_QUEUES
, dev
->num_tx_queues
) ||
1475 nla_put_u32(skb
, IFLA_GSO_MAX_SEGS
, dev
->gso_max_segs
) ||
1476 nla_put_u32(skb
, IFLA_GSO_MAX_SIZE
, dev
->gso_max_size
) ||
1478 nla_put_u32(skb
, IFLA_NUM_RX_QUEUES
, dev
->num_rx_queues
) ||
1480 put_master_ifindex(skb
, dev
) ||
1481 nla_put_u8(skb
, IFLA_CARRIER
, netif_carrier_ok(dev
)) ||
1483 nla_put_string(skb
, IFLA_QDISC
, dev
->qdisc
->ops
->id
)) ||
1484 nla_put_ifalias(skb
, dev
) ||
1485 nla_put_u32(skb
, IFLA_CARRIER_CHANGES
,
1486 atomic_read(&dev
->carrier_up_count
) +
1487 atomic_read(&dev
->carrier_down_count
)) ||
1488 nla_put_u8(skb
, IFLA_PROTO_DOWN
, dev
->proto_down
) ||
1489 nla_put_u32(skb
, IFLA_CARRIER_UP_COUNT
,
1490 atomic_read(&dev
->carrier_up_count
)) ||
1491 nla_put_u32(skb
, IFLA_CARRIER_DOWN_COUNT
,
1492 atomic_read(&dev
->carrier_down_count
)))
1493 goto nla_put_failure
;
1495 if (event
!= IFLA_EVENT_NONE
) {
1496 if (nla_put_u32(skb
, IFLA_EVENT
, event
))
1497 goto nla_put_failure
;
1500 if (rtnl_fill_link_ifmap(skb
, dev
))
1501 goto nla_put_failure
;
1503 if (dev
->addr_len
) {
1504 if (nla_put(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
) ||
1505 nla_put(skb
, IFLA_BROADCAST
, dev
->addr_len
, dev
->broadcast
))
1506 goto nla_put_failure
;
1509 if (rtnl_phys_port_id_fill(skb
, dev
))
1510 goto nla_put_failure
;
1512 if (rtnl_phys_port_name_fill(skb
, dev
))
1513 goto nla_put_failure
;
1515 if (rtnl_phys_switch_id_fill(skb
, dev
))
1516 goto nla_put_failure
;
1518 if (rtnl_fill_stats(skb
, dev
))
1519 goto nla_put_failure
;
1521 if (rtnl_fill_vf(skb
, dev
, ext_filter_mask
))
1522 goto nla_put_failure
;
1524 if (rtnl_port_fill(skb
, dev
, ext_filter_mask
))
1525 goto nla_put_failure
;
1527 if (rtnl_xdp_fill(skb
, dev
))
1528 goto nla_put_failure
;
1530 if (dev
->rtnl_link_ops
|| rtnl_have_link_slave_info(dev
)) {
1531 if (rtnl_link_fill(skb
, dev
) < 0)
1532 goto nla_put_failure
;
1535 if (rtnl_fill_link_netnsid(skb
, dev
, src_net
, gfp
))
1536 goto nla_put_failure
;
1539 nla_put_s32(skb
, IFLA_NEW_NETNSID
, *new_nsid
) < 0)
1540 goto nla_put_failure
;
1542 nla_put_s32(skb
, IFLA_NEW_IFINDEX
, new_ifindex
) < 0)
1543 goto nla_put_failure
;
1547 if (rtnl_fill_link_af(skb
, dev
, ext_filter_mask
))
1548 goto nla_put_failure_rcu
;
1551 nlmsg_end(skb
, nlh
);
1554 nla_put_failure_rcu
:
1557 nlmsg_cancel(skb
, nlh
);
1561 static const struct nla_policy ifla_policy
[IFLA_MAX
+1] = {
1562 [IFLA_IFNAME
] = { .type
= NLA_STRING
, .len
= IFNAMSIZ
-1 },
1563 [IFLA_ADDRESS
] = { .type
= NLA_BINARY
, .len
= MAX_ADDR_LEN
},
1564 [IFLA_BROADCAST
] = { .type
= NLA_BINARY
, .len
= MAX_ADDR_LEN
},
1565 [IFLA_MAP
] = { .len
= sizeof(struct rtnl_link_ifmap
) },
1566 [IFLA_MTU
] = { .type
= NLA_U32
},
1567 [IFLA_LINK
] = { .type
= NLA_U32
},
1568 [IFLA_MASTER
] = { .type
= NLA_U32
},
1569 [IFLA_CARRIER
] = { .type
= NLA_U8
},
1570 [IFLA_TXQLEN
] = { .type
= NLA_U32
},
1571 [IFLA_WEIGHT
] = { .type
= NLA_U32
},
1572 [IFLA_OPERSTATE
] = { .type
= NLA_U8
},
1573 [IFLA_LINKMODE
] = { .type
= NLA_U8
},
1574 [IFLA_LINKINFO
] = { .type
= NLA_NESTED
},
1575 [IFLA_NET_NS_PID
] = { .type
= NLA_U32
},
1576 [IFLA_NET_NS_FD
] = { .type
= NLA_U32
},
1577 /* IFLA_IFALIAS is a string, but policy is set to NLA_BINARY to
1578 * allow 0-length string (needed to remove an alias).
1580 [IFLA_IFALIAS
] = { .type
= NLA_BINARY
, .len
= IFALIASZ
- 1 },
1581 [IFLA_VFINFO_LIST
] = {. type
= NLA_NESTED
},
1582 [IFLA_VF_PORTS
] = { .type
= NLA_NESTED
},
1583 [IFLA_PORT_SELF
] = { .type
= NLA_NESTED
},
1584 [IFLA_AF_SPEC
] = { .type
= NLA_NESTED
},
1585 [IFLA_EXT_MASK
] = { .type
= NLA_U32
},
1586 [IFLA_PROMISCUITY
] = { .type
= NLA_U32
},
1587 [IFLA_NUM_TX_QUEUES
] = { .type
= NLA_U32
},
1588 [IFLA_NUM_RX_QUEUES
] = { .type
= NLA_U32
},
1589 [IFLA_PHYS_PORT_ID
] = { .type
= NLA_BINARY
, .len
= MAX_PHYS_ITEM_ID_LEN
},
1590 [IFLA_CARRIER_CHANGES
] = { .type
= NLA_U32
}, /* ignored */
1591 [IFLA_PHYS_SWITCH_ID
] = { .type
= NLA_BINARY
, .len
= MAX_PHYS_ITEM_ID_LEN
},
1592 [IFLA_LINK_NETNSID
] = { .type
= NLA_S32
},
1593 [IFLA_PROTO_DOWN
] = { .type
= NLA_U8
},
1594 [IFLA_XDP
] = { .type
= NLA_NESTED
},
1595 [IFLA_EVENT
] = { .type
= NLA_U32
},
1596 [IFLA_GROUP
] = { .type
= NLA_U32
},
1597 [IFLA_IF_NETNSID
] = { .type
= NLA_S32
},
1598 [IFLA_CARRIER_UP_COUNT
] = { .type
= NLA_U32
},
1599 [IFLA_CARRIER_DOWN_COUNT
] = { .type
= NLA_U32
},
1602 static const struct nla_policy ifla_info_policy
[IFLA_INFO_MAX
+1] = {
1603 [IFLA_INFO_KIND
] = { .type
= NLA_STRING
},
1604 [IFLA_INFO_DATA
] = { .type
= NLA_NESTED
},
1605 [IFLA_INFO_SLAVE_KIND
] = { .type
= NLA_STRING
},
1606 [IFLA_INFO_SLAVE_DATA
] = { .type
= NLA_NESTED
},
1609 static const struct nla_policy ifla_vf_policy
[IFLA_VF_MAX
+1] = {
1610 [IFLA_VF_MAC
] = { .len
= sizeof(struct ifla_vf_mac
) },
1611 [IFLA_VF_VLAN
] = { .len
= sizeof(struct ifla_vf_vlan
) },
1612 [IFLA_VF_VLAN_LIST
] = { .type
= NLA_NESTED
},
1613 [IFLA_VF_TX_RATE
] = { .len
= sizeof(struct ifla_vf_tx_rate
) },
1614 [IFLA_VF_SPOOFCHK
] = { .len
= sizeof(struct ifla_vf_spoofchk
) },
1615 [IFLA_VF_RATE
] = { .len
= sizeof(struct ifla_vf_rate
) },
1616 [IFLA_VF_LINK_STATE
] = { .len
= sizeof(struct ifla_vf_link_state
) },
1617 [IFLA_VF_RSS_QUERY_EN
] = { .len
= sizeof(struct ifla_vf_rss_query_en
) },
1618 [IFLA_VF_STATS
] = { .type
= NLA_NESTED
},
1619 [IFLA_VF_TRUST
] = { .len
= sizeof(struct ifla_vf_trust
) },
1620 [IFLA_VF_IB_NODE_GUID
] = { .len
= sizeof(struct ifla_vf_guid
) },
1621 [IFLA_VF_IB_PORT_GUID
] = { .len
= sizeof(struct ifla_vf_guid
) },
1624 static const struct nla_policy ifla_port_policy
[IFLA_PORT_MAX
+1] = {
1625 [IFLA_PORT_VF
] = { .type
= NLA_U32
},
1626 [IFLA_PORT_PROFILE
] = { .type
= NLA_STRING
,
1627 .len
= PORT_PROFILE_MAX
},
1628 [IFLA_PORT_INSTANCE_UUID
] = { .type
= NLA_BINARY
,
1629 .len
= PORT_UUID_MAX
},
1630 [IFLA_PORT_HOST_UUID
] = { .type
= NLA_STRING
,
1631 .len
= PORT_UUID_MAX
},
1632 [IFLA_PORT_REQUEST
] = { .type
= NLA_U8
, },
1633 [IFLA_PORT_RESPONSE
] = { .type
= NLA_U16
, },
1635 /* Unused, but we need to keep it here since user space could
1636 * fill it. It's also broken with regard to NLA_BINARY use in
1637 * combination with structs.
1639 [IFLA_PORT_VSI_TYPE
] = { .type
= NLA_BINARY
,
1640 .len
= sizeof(struct ifla_port_vsi
) },
1643 static const struct nla_policy ifla_xdp_policy
[IFLA_XDP_MAX
+ 1] = {
1644 [IFLA_XDP_FD
] = { .type
= NLA_S32
},
1645 [IFLA_XDP_ATTACHED
] = { .type
= NLA_U8
},
1646 [IFLA_XDP_FLAGS
] = { .type
= NLA_U32
},
1647 [IFLA_XDP_PROG_ID
] = { .type
= NLA_U32
},
1650 static const struct rtnl_link_ops
*linkinfo_to_kind_ops(const struct nlattr
*nla
)
1652 const struct rtnl_link_ops
*ops
= NULL
;
1653 struct nlattr
*linfo
[IFLA_INFO_MAX
+ 1];
1655 if (nla_parse_nested(linfo
, IFLA_INFO_MAX
, nla
,
1656 ifla_info_policy
, NULL
) < 0)
1659 if (linfo
[IFLA_INFO_KIND
]) {
1660 char kind
[MODULE_NAME_LEN
];
1662 nla_strlcpy(kind
, linfo
[IFLA_INFO_KIND
], sizeof(kind
));
1663 ops
= rtnl_link_ops_get(kind
);
1669 static bool link_master_filtered(struct net_device
*dev
, int master_idx
)
1671 struct net_device
*master
;
1676 master
= netdev_master_upper_dev_get(dev
);
1677 if (!master
|| master
->ifindex
!= master_idx
)
1683 static bool link_kind_filtered(const struct net_device
*dev
,
1684 const struct rtnl_link_ops
*kind_ops
)
1686 if (kind_ops
&& dev
->rtnl_link_ops
!= kind_ops
)
1692 static bool link_dump_filtered(struct net_device
*dev
,
1694 const struct rtnl_link_ops
*kind_ops
)
1696 if (link_master_filtered(dev
, master_idx
) ||
1697 link_kind_filtered(dev
, kind_ops
))
1703 static struct net
*get_target_net(struct sock
*sk
, int netnsid
)
1707 net
= get_net_ns_by_id(sock_net(sk
), netnsid
);
1709 return ERR_PTR(-EINVAL
);
1711 /* For now, the caller is required to have CAP_NET_ADMIN in
1712 * the user namespace owning the target net ns.
1714 if (!sk_ns_capable(sk
, net
->user_ns
, CAP_NET_ADMIN
)) {
1716 return ERR_PTR(-EACCES
);
1721 static int rtnl_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1723 struct net
*net
= sock_net(skb
->sk
);
1724 struct net
*tgt_net
= net
;
1727 struct net_device
*dev
;
1728 struct hlist_head
*head
;
1729 struct nlattr
*tb
[IFLA_MAX
+1];
1730 u32 ext_filter_mask
= 0;
1731 const struct rtnl_link_ops
*kind_ops
= NULL
;
1732 unsigned int flags
= NLM_F_MULTI
;
1739 s_idx
= cb
->args
[1];
1741 /* A hack to preserve kernel<->userspace interface.
1742 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1743 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1744 * what iproute2 < v3.9.0 used.
1745 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1746 * attribute, its netlink message is shorter than struct ifinfomsg.
1748 hdrlen
= nlmsg_len(cb
->nlh
) < sizeof(struct ifinfomsg
) ?
1749 sizeof(struct rtgenmsg
) : sizeof(struct ifinfomsg
);
1751 if (nlmsg_parse(cb
->nlh
, hdrlen
, tb
, IFLA_MAX
,
1752 ifla_policy
, NULL
) >= 0) {
1753 if (tb
[IFLA_IF_NETNSID
]) {
1754 netnsid
= nla_get_s32(tb
[IFLA_IF_NETNSID
]);
1755 tgt_net
= get_target_net(skb
->sk
, netnsid
);
1756 if (IS_ERR(tgt_net
))
1757 return PTR_ERR(tgt_net
);
1760 if (tb
[IFLA_EXT_MASK
])
1761 ext_filter_mask
= nla_get_u32(tb
[IFLA_EXT_MASK
]);
1763 if (tb
[IFLA_MASTER
])
1764 master_idx
= nla_get_u32(tb
[IFLA_MASTER
]);
1766 if (tb
[IFLA_LINKINFO
])
1767 kind_ops
= linkinfo_to_kind_ops(tb
[IFLA_LINKINFO
]);
1769 if (master_idx
|| kind_ops
)
1770 flags
|= NLM_F_DUMP_FILTERED
;
1773 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
1775 head
= &tgt_net
->dev_index_head
[h
];
1776 hlist_for_each_entry(dev
, head
, index_hlist
) {
1777 if (link_dump_filtered(dev
, master_idx
, kind_ops
))
1781 err
= rtnl_fill_ifinfo(skb
, dev
, net
,
1783 NETLINK_CB(cb
->skb
).portid
,
1784 cb
->nlh
->nlmsg_seq
, 0,
1786 ext_filter_mask
, 0, NULL
, 0,
1787 netnsid
, GFP_KERNEL
);
1790 if (likely(skb
->len
))
1804 cb
->seq
= net
->dev_base_seq
;
1805 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
1812 int rtnl_nla_parse_ifla(struct nlattr
**tb
, const struct nlattr
*head
, int len
,
1813 struct netlink_ext_ack
*exterr
)
1815 return nla_parse(tb
, IFLA_MAX
, head
, len
, ifla_policy
, exterr
);
1817 EXPORT_SYMBOL(rtnl_nla_parse_ifla
);
1819 struct net
*rtnl_link_get_net(struct net
*src_net
, struct nlattr
*tb
[])
1822 /* Examine the link attributes and figure out which
1823 * network namespace we are talking about.
1825 if (tb
[IFLA_NET_NS_PID
])
1826 net
= get_net_ns_by_pid(nla_get_u32(tb
[IFLA_NET_NS_PID
]));
1827 else if (tb
[IFLA_NET_NS_FD
])
1828 net
= get_net_ns_by_fd(nla_get_u32(tb
[IFLA_NET_NS_FD
]));
1830 net
= get_net(src_net
);
1833 EXPORT_SYMBOL(rtnl_link_get_net
);
1835 /* Figure out which network namespace we are talking about by
1836 * examining the link attributes in the following order:
1838 * 1. IFLA_NET_NS_PID
1840 * 3. IFLA_IF_NETNSID
1842 static struct net
*rtnl_link_get_net_by_nlattr(struct net
*src_net
,
1843 struct nlattr
*tb
[])
1847 if (tb
[IFLA_NET_NS_PID
] || tb
[IFLA_NET_NS_FD
])
1848 return rtnl_link_get_net(src_net
, tb
);
1850 if (!tb
[IFLA_IF_NETNSID
])
1851 return get_net(src_net
);
1853 net
= get_net_ns_by_id(src_net
, nla_get_u32(tb
[IFLA_IF_NETNSID
]));
1855 return ERR_PTR(-EINVAL
);
1860 static struct net
*rtnl_link_get_net_capable(const struct sk_buff
*skb
,
1861 struct net
*src_net
,
1862 struct nlattr
*tb
[], int cap
)
1866 net
= rtnl_link_get_net_by_nlattr(src_net
, tb
);
1870 if (!netlink_ns_capable(skb
, net
->user_ns
, cap
)) {
1872 return ERR_PTR(-EPERM
);
1878 /* Verify that rtnetlink requests do not pass additional properties
1879 * potentially referring to different network namespaces.
1881 static int rtnl_ensure_unique_netns(struct nlattr
*tb
[],
1882 struct netlink_ext_ack
*extack
,
1886 if (netns_id_only
) {
1887 if (!tb
[IFLA_NET_NS_PID
] && !tb
[IFLA_NET_NS_FD
])
1890 NL_SET_ERR_MSG(extack
, "specified netns attribute not supported");
1894 if (tb
[IFLA_IF_NETNSID
] && (tb
[IFLA_NET_NS_PID
] || tb
[IFLA_NET_NS_FD
]))
1897 if (tb
[IFLA_NET_NS_PID
] && (tb
[IFLA_IF_NETNSID
] || tb
[IFLA_NET_NS_FD
]))
1900 if (tb
[IFLA_NET_NS_FD
] && (tb
[IFLA_IF_NETNSID
] || tb
[IFLA_NET_NS_PID
]))
1906 NL_SET_ERR_MSG(extack
, "multiple netns identifying attributes specified");
1910 static int validate_linkmsg(struct net_device
*dev
, struct nlattr
*tb
[])
1913 if (tb
[IFLA_ADDRESS
] &&
1914 nla_len(tb
[IFLA_ADDRESS
]) < dev
->addr_len
)
1917 if (tb
[IFLA_BROADCAST
] &&
1918 nla_len(tb
[IFLA_BROADCAST
]) < dev
->addr_len
)
1922 if (tb
[IFLA_AF_SPEC
]) {
1926 nla_for_each_nested(af
, tb
[IFLA_AF_SPEC
], rem
) {
1927 const struct rtnl_af_ops
*af_ops
;
1930 af_ops
= rtnl_af_lookup(nla_type(af
));
1933 return -EAFNOSUPPORT
;
1936 if (!af_ops
->set_link_af
) {
1941 if (af_ops
->validate_link_af
) {
1942 err
= af_ops
->validate_link_af(dev
, af
);
1956 static int handle_infiniband_guid(struct net_device
*dev
, struct ifla_vf_guid
*ivt
,
1959 const struct net_device_ops
*ops
= dev
->netdev_ops
;
1961 return ops
->ndo_set_vf_guid(dev
, ivt
->vf
, ivt
->guid
, guid_type
);
1964 static int handle_vf_guid(struct net_device
*dev
, struct ifla_vf_guid
*ivt
, int guid_type
)
1966 if (dev
->type
!= ARPHRD_INFINIBAND
)
1969 return handle_infiniband_guid(dev
, ivt
, guid_type
);
1972 static int do_setvfinfo(struct net_device
*dev
, struct nlattr
**tb
)
1974 const struct net_device_ops
*ops
= dev
->netdev_ops
;
1977 if (tb
[IFLA_VF_MAC
]) {
1978 struct ifla_vf_mac
*ivm
= nla_data(tb
[IFLA_VF_MAC
]);
1980 if (ivm
->vf
>= INT_MAX
)
1983 if (ops
->ndo_set_vf_mac
)
1984 err
= ops
->ndo_set_vf_mac(dev
, ivm
->vf
,
1990 if (tb
[IFLA_VF_VLAN
]) {
1991 struct ifla_vf_vlan
*ivv
= nla_data(tb
[IFLA_VF_VLAN
]);
1993 if (ivv
->vf
>= INT_MAX
)
1996 if (ops
->ndo_set_vf_vlan
)
1997 err
= ops
->ndo_set_vf_vlan(dev
, ivv
->vf
, ivv
->vlan
,
1999 htons(ETH_P_8021Q
));
2004 if (tb
[IFLA_VF_VLAN_LIST
]) {
2005 struct ifla_vf_vlan_info
*ivvl
[MAX_VLAN_LIST_LEN
];
2006 struct nlattr
*attr
;
2010 if (!ops
->ndo_set_vf_vlan
)
2013 nla_for_each_nested(attr
, tb
[IFLA_VF_VLAN_LIST
], rem
) {
2014 if (nla_type(attr
) != IFLA_VF_VLAN_INFO
||
2015 nla_len(attr
) < NLA_HDRLEN
) {
2018 if (len
>= MAX_VLAN_LIST_LEN
)
2020 ivvl
[len
] = nla_data(attr
);
2027 if (ivvl
[0]->vf
>= INT_MAX
)
2029 err
= ops
->ndo_set_vf_vlan(dev
, ivvl
[0]->vf
, ivvl
[0]->vlan
,
2030 ivvl
[0]->qos
, ivvl
[0]->vlan_proto
);
2035 if (tb
[IFLA_VF_TX_RATE
]) {
2036 struct ifla_vf_tx_rate
*ivt
= nla_data(tb
[IFLA_VF_TX_RATE
]);
2037 struct ifla_vf_info ivf
;
2039 if (ivt
->vf
>= INT_MAX
)
2042 if (ops
->ndo_get_vf_config
)
2043 err
= ops
->ndo_get_vf_config(dev
, ivt
->vf
, &ivf
);
2048 if (ops
->ndo_set_vf_rate
)
2049 err
= ops
->ndo_set_vf_rate(dev
, ivt
->vf
,
2056 if (tb
[IFLA_VF_RATE
]) {
2057 struct ifla_vf_rate
*ivt
= nla_data(tb
[IFLA_VF_RATE
]);
2059 if (ivt
->vf
>= INT_MAX
)
2062 if (ops
->ndo_set_vf_rate
)
2063 err
= ops
->ndo_set_vf_rate(dev
, ivt
->vf
,
2070 if (tb
[IFLA_VF_SPOOFCHK
]) {
2071 struct ifla_vf_spoofchk
*ivs
= nla_data(tb
[IFLA_VF_SPOOFCHK
]);
2073 if (ivs
->vf
>= INT_MAX
)
2076 if (ops
->ndo_set_vf_spoofchk
)
2077 err
= ops
->ndo_set_vf_spoofchk(dev
, ivs
->vf
,
2083 if (tb
[IFLA_VF_LINK_STATE
]) {
2084 struct ifla_vf_link_state
*ivl
= nla_data(tb
[IFLA_VF_LINK_STATE
]);
2086 if (ivl
->vf
>= INT_MAX
)
2089 if (ops
->ndo_set_vf_link_state
)
2090 err
= ops
->ndo_set_vf_link_state(dev
, ivl
->vf
,
2096 if (tb
[IFLA_VF_RSS_QUERY_EN
]) {
2097 struct ifla_vf_rss_query_en
*ivrssq_en
;
2100 ivrssq_en
= nla_data(tb
[IFLA_VF_RSS_QUERY_EN
]);
2101 if (ivrssq_en
->vf
>= INT_MAX
)
2103 if (ops
->ndo_set_vf_rss_query_en
)
2104 err
= ops
->ndo_set_vf_rss_query_en(dev
, ivrssq_en
->vf
,
2105 ivrssq_en
->setting
);
2110 if (tb
[IFLA_VF_TRUST
]) {
2111 struct ifla_vf_trust
*ivt
= nla_data(tb
[IFLA_VF_TRUST
]);
2113 if (ivt
->vf
>= INT_MAX
)
2116 if (ops
->ndo_set_vf_trust
)
2117 err
= ops
->ndo_set_vf_trust(dev
, ivt
->vf
, ivt
->setting
);
2122 if (tb
[IFLA_VF_IB_NODE_GUID
]) {
2123 struct ifla_vf_guid
*ivt
= nla_data(tb
[IFLA_VF_IB_NODE_GUID
]);
2125 if (ivt
->vf
>= INT_MAX
)
2127 if (!ops
->ndo_set_vf_guid
)
2129 return handle_vf_guid(dev
, ivt
, IFLA_VF_IB_NODE_GUID
);
2132 if (tb
[IFLA_VF_IB_PORT_GUID
]) {
2133 struct ifla_vf_guid
*ivt
= nla_data(tb
[IFLA_VF_IB_PORT_GUID
]);
2135 if (ivt
->vf
>= INT_MAX
)
2137 if (!ops
->ndo_set_vf_guid
)
2140 return handle_vf_guid(dev
, ivt
, IFLA_VF_IB_PORT_GUID
);
2146 static int do_set_master(struct net_device
*dev
, int ifindex
,
2147 struct netlink_ext_ack
*extack
)
2149 struct net_device
*upper_dev
= netdev_master_upper_dev_get(dev
);
2150 const struct net_device_ops
*ops
;
2154 if (upper_dev
->ifindex
== ifindex
)
2156 ops
= upper_dev
->netdev_ops
;
2157 if (ops
->ndo_del_slave
) {
2158 err
= ops
->ndo_del_slave(upper_dev
, dev
);
2167 upper_dev
= __dev_get_by_index(dev_net(dev
), ifindex
);
2170 ops
= upper_dev
->netdev_ops
;
2171 if (ops
->ndo_add_slave
) {
2172 err
= ops
->ndo_add_slave(upper_dev
, dev
, extack
);
2182 #define DO_SETLINK_MODIFIED 0x01
2183 /* notify flag means notify + modified. */
2184 #define DO_SETLINK_NOTIFY 0x03
2185 static int do_setlink(const struct sk_buff
*skb
,
2186 struct net_device
*dev
, struct ifinfomsg
*ifm
,
2187 struct netlink_ext_ack
*extack
,
2188 struct nlattr
**tb
, char *ifname
, int status
)
2190 const struct net_device_ops
*ops
= dev
->netdev_ops
;
2193 err
= validate_linkmsg(dev
, tb
);
2197 if (tb
[IFLA_NET_NS_PID
] || tb
[IFLA_NET_NS_FD
] || tb
[IFLA_IF_NETNSID
]) {
2198 struct net
*net
= rtnl_link_get_net_capable(skb
, dev_net(dev
),
2205 err
= dev_change_net_namespace(dev
, net
, ifname
);
2209 status
|= DO_SETLINK_MODIFIED
;
2213 struct rtnl_link_ifmap
*u_map
;
2216 if (!ops
->ndo_set_config
) {
2221 if (!netif_device_present(dev
)) {
2226 u_map
= nla_data(tb
[IFLA_MAP
]);
2227 k_map
.mem_start
= (unsigned long) u_map
->mem_start
;
2228 k_map
.mem_end
= (unsigned long) u_map
->mem_end
;
2229 k_map
.base_addr
= (unsigned short) u_map
->base_addr
;
2230 k_map
.irq
= (unsigned char) u_map
->irq
;
2231 k_map
.dma
= (unsigned char) u_map
->dma
;
2232 k_map
.port
= (unsigned char) u_map
->port
;
2234 err
= ops
->ndo_set_config(dev
, &k_map
);
2238 status
|= DO_SETLINK_NOTIFY
;
2241 if (tb
[IFLA_ADDRESS
]) {
2242 struct sockaddr
*sa
;
2245 len
= sizeof(sa_family_t
) + max_t(size_t, dev
->addr_len
,
2247 sa
= kmalloc(len
, GFP_KERNEL
);
2252 sa
->sa_family
= dev
->type
;
2253 memcpy(sa
->sa_data
, nla_data(tb
[IFLA_ADDRESS
]),
2255 err
= dev_set_mac_address(dev
, sa
);
2259 status
|= DO_SETLINK_MODIFIED
;
2263 err
= dev_set_mtu(dev
, nla_get_u32(tb
[IFLA_MTU
]));
2266 status
|= DO_SETLINK_MODIFIED
;
2269 if (tb
[IFLA_GROUP
]) {
2270 dev_set_group(dev
, nla_get_u32(tb
[IFLA_GROUP
]));
2271 status
|= DO_SETLINK_NOTIFY
;
2275 * Interface selected by interface index but interface
2276 * name provided implies that a name change has been
2279 if (ifm
->ifi_index
> 0 && ifname
[0]) {
2280 err
= dev_change_name(dev
, ifname
);
2283 status
|= DO_SETLINK_MODIFIED
;
2286 if (tb
[IFLA_IFALIAS
]) {
2287 err
= dev_set_alias(dev
, nla_data(tb
[IFLA_IFALIAS
]),
2288 nla_len(tb
[IFLA_IFALIAS
]));
2291 status
|= DO_SETLINK_NOTIFY
;
2294 if (tb
[IFLA_BROADCAST
]) {
2295 nla_memcpy(dev
->broadcast
, tb
[IFLA_BROADCAST
], dev
->addr_len
);
2296 call_netdevice_notifiers(NETDEV_CHANGEADDR
, dev
);
2299 if (ifm
->ifi_flags
|| ifm
->ifi_change
) {
2300 err
= dev_change_flags(dev
, rtnl_dev_combine_flags(dev
, ifm
));
2305 if (tb
[IFLA_MASTER
]) {
2306 err
= do_set_master(dev
, nla_get_u32(tb
[IFLA_MASTER
]), extack
);
2309 status
|= DO_SETLINK_MODIFIED
;
2312 if (tb
[IFLA_CARRIER
]) {
2313 err
= dev_change_carrier(dev
, nla_get_u8(tb
[IFLA_CARRIER
]));
2316 status
|= DO_SETLINK_MODIFIED
;
2319 if (tb
[IFLA_TXQLEN
]) {
2320 unsigned int value
= nla_get_u32(tb
[IFLA_TXQLEN
]);
2321 unsigned int orig_len
= dev
->tx_queue_len
;
2323 if (dev
->tx_queue_len
^ value
) {
2324 dev
->tx_queue_len
= value
;
2325 err
= call_netdevice_notifiers(
2326 NETDEV_CHANGE_TX_QUEUE_LEN
, dev
);
2327 err
= notifier_to_errno(err
);
2329 dev
->tx_queue_len
= orig_len
;
2332 status
|= DO_SETLINK_MODIFIED
;
2336 if (tb
[IFLA_OPERSTATE
])
2337 set_operstate(dev
, nla_get_u8(tb
[IFLA_OPERSTATE
]));
2339 if (tb
[IFLA_LINKMODE
]) {
2340 unsigned char value
= nla_get_u8(tb
[IFLA_LINKMODE
]);
2342 write_lock_bh(&dev_base_lock
);
2343 if (dev
->link_mode
^ value
)
2344 status
|= DO_SETLINK_NOTIFY
;
2345 dev
->link_mode
= value
;
2346 write_unlock_bh(&dev_base_lock
);
2349 if (tb
[IFLA_VFINFO_LIST
]) {
2350 struct nlattr
*vfinfo
[IFLA_VF_MAX
+ 1];
2351 struct nlattr
*attr
;
2354 nla_for_each_nested(attr
, tb
[IFLA_VFINFO_LIST
], rem
) {
2355 if (nla_type(attr
) != IFLA_VF_INFO
||
2356 nla_len(attr
) < NLA_HDRLEN
) {
2360 err
= nla_parse_nested(vfinfo
, IFLA_VF_MAX
, attr
,
2361 ifla_vf_policy
, NULL
);
2364 err
= do_setvfinfo(dev
, vfinfo
);
2367 status
|= DO_SETLINK_NOTIFY
;
2372 if (tb
[IFLA_VF_PORTS
]) {
2373 struct nlattr
*port
[IFLA_PORT_MAX
+1];
2374 struct nlattr
*attr
;
2379 if (!ops
->ndo_set_vf_port
)
2382 nla_for_each_nested(attr
, tb
[IFLA_VF_PORTS
], rem
) {
2383 if (nla_type(attr
) != IFLA_VF_PORT
||
2384 nla_len(attr
) < NLA_HDRLEN
) {
2388 err
= nla_parse_nested(port
, IFLA_PORT_MAX
, attr
,
2389 ifla_port_policy
, NULL
);
2392 if (!port
[IFLA_PORT_VF
]) {
2396 vf
= nla_get_u32(port
[IFLA_PORT_VF
]);
2397 err
= ops
->ndo_set_vf_port(dev
, vf
, port
);
2400 status
|= DO_SETLINK_NOTIFY
;
2405 if (tb
[IFLA_PORT_SELF
]) {
2406 struct nlattr
*port
[IFLA_PORT_MAX
+1];
2408 err
= nla_parse_nested(port
, IFLA_PORT_MAX
,
2409 tb
[IFLA_PORT_SELF
], ifla_port_policy
,
2415 if (ops
->ndo_set_vf_port
)
2416 err
= ops
->ndo_set_vf_port(dev
, PORT_SELF_VF
, port
);
2419 status
|= DO_SETLINK_NOTIFY
;
2422 if (tb
[IFLA_AF_SPEC
]) {
2426 nla_for_each_nested(af
, tb
[IFLA_AF_SPEC
], rem
) {
2427 const struct rtnl_af_ops
*af_ops
;
2431 BUG_ON(!(af_ops
= rtnl_af_lookup(nla_type(af
))));
2433 err
= af_ops
->set_link_af(dev
, af
);
2440 status
|= DO_SETLINK_NOTIFY
;
2445 if (tb
[IFLA_PROTO_DOWN
]) {
2446 err
= dev_change_proto_down(dev
,
2447 nla_get_u8(tb
[IFLA_PROTO_DOWN
]));
2450 status
|= DO_SETLINK_NOTIFY
;
2454 struct nlattr
*xdp
[IFLA_XDP_MAX
+ 1];
2457 err
= nla_parse_nested(xdp
, IFLA_XDP_MAX
, tb
[IFLA_XDP
],
2458 ifla_xdp_policy
, NULL
);
2462 if (xdp
[IFLA_XDP_ATTACHED
] || xdp
[IFLA_XDP_PROG_ID
]) {
2467 if (xdp
[IFLA_XDP_FLAGS
]) {
2468 xdp_flags
= nla_get_u32(xdp
[IFLA_XDP_FLAGS
]);
2469 if (xdp_flags
& ~XDP_FLAGS_MASK
) {
2473 if (hweight32(xdp_flags
& XDP_FLAGS_MODES
) > 1) {
2479 if (xdp
[IFLA_XDP_FD
]) {
2480 err
= dev_change_xdp_fd(dev
, extack
,
2481 nla_get_s32(xdp
[IFLA_XDP_FD
]),
2485 status
|= DO_SETLINK_NOTIFY
;
2490 if (status
& DO_SETLINK_MODIFIED
) {
2491 if ((status
& DO_SETLINK_NOTIFY
) == DO_SETLINK_NOTIFY
)
2492 netdev_state_change(dev
);
2495 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",
2502 static int rtnl_setlink(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2503 struct netlink_ext_ack
*extack
)
2505 struct net
*net
= sock_net(skb
->sk
);
2506 struct ifinfomsg
*ifm
;
2507 struct net_device
*dev
;
2509 struct nlattr
*tb
[IFLA_MAX
+1];
2510 char ifname
[IFNAMSIZ
];
2512 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFLA_MAX
, ifla_policy
,
2517 err
= rtnl_ensure_unique_netns(tb
, extack
, false);
2521 if (tb
[IFLA_IFNAME
])
2522 nla_strlcpy(ifname
, tb
[IFLA_IFNAME
], IFNAMSIZ
);
2527 ifm
= nlmsg_data(nlh
);
2528 if (ifm
->ifi_index
> 0)
2529 dev
= __dev_get_by_index(net
, ifm
->ifi_index
);
2530 else if (tb
[IFLA_IFNAME
])
2531 dev
= __dev_get_by_name(net
, ifname
);
2540 err
= do_setlink(skb
, dev
, ifm
, extack
, tb
, ifname
, 0);
2545 static int rtnl_group_dellink(const struct net
*net
, int group
)
2547 struct net_device
*dev
, *aux
;
2548 LIST_HEAD(list_kill
);
2554 for_each_netdev(net
, dev
) {
2555 if (dev
->group
== group
) {
2556 const struct rtnl_link_ops
*ops
;
2559 ops
= dev
->rtnl_link_ops
;
2560 if (!ops
|| !ops
->dellink
)
2568 for_each_netdev_safe(net
, dev
, aux
) {
2569 if (dev
->group
== group
) {
2570 const struct rtnl_link_ops
*ops
;
2572 ops
= dev
->rtnl_link_ops
;
2573 ops
->dellink(dev
, &list_kill
);
2576 unregister_netdevice_many(&list_kill
);
2581 int rtnl_delete_link(struct net_device
*dev
)
2583 const struct rtnl_link_ops
*ops
;
2584 LIST_HEAD(list_kill
);
2586 ops
= dev
->rtnl_link_ops
;
2587 if (!ops
|| !ops
->dellink
)
2590 ops
->dellink(dev
, &list_kill
);
2591 unregister_netdevice_many(&list_kill
);
2595 EXPORT_SYMBOL_GPL(rtnl_delete_link
);
2597 static int rtnl_dellink(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2598 struct netlink_ext_ack
*extack
)
2600 struct net
*net
= sock_net(skb
->sk
);
2601 struct net
*tgt_net
= net
;
2602 struct net_device
*dev
= NULL
;
2603 struct ifinfomsg
*ifm
;
2604 char ifname
[IFNAMSIZ
];
2605 struct nlattr
*tb
[IFLA_MAX
+1];
2609 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFLA_MAX
, ifla_policy
, extack
);
2613 err
= rtnl_ensure_unique_netns(tb
, extack
, true);
2617 if (tb
[IFLA_IFNAME
])
2618 nla_strlcpy(ifname
, tb
[IFLA_IFNAME
], IFNAMSIZ
);
2620 if (tb
[IFLA_IF_NETNSID
]) {
2621 netnsid
= nla_get_s32(tb
[IFLA_IF_NETNSID
]);
2622 tgt_net
= get_target_net(NETLINK_CB(skb
).sk
, netnsid
);
2623 if (IS_ERR(tgt_net
))
2624 return PTR_ERR(tgt_net
);
2628 ifm
= nlmsg_data(nlh
);
2629 if (ifm
->ifi_index
> 0)
2630 dev
= __dev_get_by_index(tgt_net
, ifm
->ifi_index
);
2631 else if (tb
[IFLA_IFNAME
])
2632 dev
= __dev_get_by_name(tgt_net
, ifname
);
2633 else if (tb
[IFLA_GROUP
])
2634 err
= rtnl_group_dellink(tgt_net
, nla_get_u32(tb
[IFLA_GROUP
]));
2639 if (tb
[IFLA_IFNAME
] || ifm
->ifi_index
> 0)
2645 err
= rtnl_delete_link(dev
);
2654 int rtnl_configure_link(struct net_device
*dev
, const struct ifinfomsg
*ifm
)
2656 unsigned int old_flags
;
2659 old_flags
= dev
->flags
;
2660 if (ifm
&& (ifm
->ifi_flags
|| ifm
->ifi_change
)) {
2661 err
= __dev_change_flags(dev
, rtnl_dev_combine_flags(dev
, ifm
));
2666 if (dev
->rtnl_link_state
== RTNL_LINK_INITIALIZED
) {
2667 __dev_notify_flags(dev
, old_flags
, (old_flags
^ dev
->flags
));
2669 dev
->rtnl_link_state
= RTNL_LINK_INITIALIZED
;
2670 __dev_notify_flags(dev
, old_flags
, ~0U);
2674 EXPORT_SYMBOL(rtnl_configure_link
);
2676 struct net_device
*rtnl_create_link(struct net
*net
,
2677 const char *ifname
, unsigned char name_assign_type
,
2678 const struct rtnl_link_ops
*ops
, struct nlattr
*tb
[])
2680 struct net_device
*dev
;
2681 unsigned int num_tx_queues
= 1;
2682 unsigned int num_rx_queues
= 1;
2684 if (tb
[IFLA_NUM_TX_QUEUES
])
2685 num_tx_queues
= nla_get_u32(tb
[IFLA_NUM_TX_QUEUES
]);
2686 else if (ops
->get_num_tx_queues
)
2687 num_tx_queues
= ops
->get_num_tx_queues();
2689 if (tb
[IFLA_NUM_RX_QUEUES
])
2690 num_rx_queues
= nla_get_u32(tb
[IFLA_NUM_RX_QUEUES
]);
2691 else if (ops
->get_num_rx_queues
)
2692 num_rx_queues
= ops
->get_num_rx_queues();
2694 if (num_tx_queues
< 1 || num_tx_queues
> 4096)
2695 return ERR_PTR(-EINVAL
);
2697 if (num_rx_queues
< 1 || num_rx_queues
> 4096)
2698 return ERR_PTR(-EINVAL
);
2700 dev
= alloc_netdev_mqs(ops
->priv_size
, ifname
, name_assign_type
,
2701 ops
->setup
, num_tx_queues
, num_rx_queues
);
2703 return ERR_PTR(-ENOMEM
);
2705 dev_net_set(dev
, net
);
2706 dev
->rtnl_link_ops
= ops
;
2707 dev
->rtnl_link_state
= RTNL_LINK_INITIALIZING
;
2710 u32 mtu
= nla_get_u32(tb
[IFLA_MTU
]);
2713 err
= dev_validate_mtu(dev
, mtu
);
2716 return ERR_PTR(err
);
2720 if (tb
[IFLA_ADDRESS
]) {
2721 memcpy(dev
->dev_addr
, nla_data(tb
[IFLA_ADDRESS
]),
2722 nla_len(tb
[IFLA_ADDRESS
]));
2723 dev
->addr_assign_type
= NET_ADDR_SET
;
2725 if (tb
[IFLA_BROADCAST
])
2726 memcpy(dev
->broadcast
, nla_data(tb
[IFLA_BROADCAST
]),
2727 nla_len(tb
[IFLA_BROADCAST
]));
2728 if (tb
[IFLA_TXQLEN
])
2729 dev
->tx_queue_len
= nla_get_u32(tb
[IFLA_TXQLEN
]);
2730 if (tb
[IFLA_OPERSTATE
])
2731 set_operstate(dev
, nla_get_u8(tb
[IFLA_OPERSTATE
]));
2732 if (tb
[IFLA_LINKMODE
])
2733 dev
->link_mode
= nla_get_u8(tb
[IFLA_LINKMODE
]);
2735 dev_set_group(dev
, nla_get_u32(tb
[IFLA_GROUP
]));
2739 EXPORT_SYMBOL(rtnl_create_link
);
2741 static int rtnl_group_changelink(const struct sk_buff
*skb
,
2742 struct net
*net
, int group
,
2743 struct ifinfomsg
*ifm
,
2744 struct netlink_ext_ack
*extack
,
2747 struct net_device
*dev
, *aux
;
2750 for_each_netdev_safe(net
, dev
, aux
) {
2751 if (dev
->group
== group
) {
2752 err
= do_setlink(skb
, dev
, ifm
, extack
, tb
, NULL
, 0);
2761 static int rtnl_newlink(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2762 struct netlink_ext_ack
*extack
)
2764 struct net
*net
= sock_net(skb
->sk
);
2765 const struct rtnl_link_ops
*ops
;
2766 const struct rtnl_link_ops
*m_ops
= NULL
;
2767 struct net_device
*dev
;
2768 struct net_device
*master_dev
= NULL
;
2769 struct ifinfomsg
*ifm
;
2770 char kind
[MODULE_NAME_LEN
];
2771 char ifname
[IFNAMSIZ
];
2772 struct nlattr
*tb
[IFLA_MAX
+1];
2773 struct nlattr
*linkinfo
[IFLA_INFO_MAX
+1];
2774 unsigned char name_assign_type
= NET_NAME_USER
;
2777 #ifdef CONFIG_MODULES
2780 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFLA_MAX
, ifla_policy
, extack
);
2784 err
= rtnl_ensure_unique_netns(tb
, extack
, false);
2788 if (tb
[IFLA_IFNAME
])
2789 nla_strlcpy(ifname
, tb
[IFLA_IFNAME
], IFNAMSIZ
);
2793 ifm
= nlmsg_data(nlh
);
2794 if (ifm
->ifi_index
> 0)
2795 dev
= __dev_get_by_index(net
, ifm
->ifi_index
);
2798 dev
= __dev_get_by_name(net
, ifname
);
2804 master_dev
= netdev_master_upper_dev_get(dev
);
2806 m_ops
= master_dev
->rtnl_link_ops
;
2809 err
= validate_linkmsg(dev
, tb
);
2813 if (tb
[IFLA_LINKINFO
]) {
2814 err
= nla_parse_nested(linkinfo
, IFLA_INFO_MAX
,
2815 tb
[IFLA_LINKINFO
], ifla_info_policy
,
2820 memset(linkinfo
, 0, sizeof(linkinfo
));
2822 if (linkinfo
[IFLA_INFO_KIND
]) {
2823 nla_strlcpy(kind
, linkinfo
[IFLA_INFO_KIND
], sizeof(kind
));
2824 ops
= rtnl_link_ops_get(kind
);
2831 struct nlattr
*attr
[ops
? ops
->maxtype
+ 1 : 1];
2832 struct nlattr
*slave_attr
[m_ops
? m_ops
->slave_maxtype
+ 1 : 1];
2833 struct nlattr
**data
= NULL
;
2834 struct nlattr
**slave_data
= NULL
;
2835 struct net
*dest_net
, *link_net
= NULL
;
2838 if (ops
->maxtype
&& linkinfo
[IFLA_INFO_DATA
]) {
2839 err
= nla_parse_nested(attr
, ops
->maxtype
,
2840 linkinfo
[IFLA_INFO_DATA
],
2846 if (ops
->validate
) {
2847 err
= ops
->validate(tb
, data
, extack
);
2854 if (m_ops
->slave_maxtype
&&
2855 linkinfo
[IFLA_INFO_SLAVE_DATA
]) {
2856 err
= nla_parse_nested(slave_attr
,
2857 m_ops
->slave_maxtype
,
2858 linkinfo
[IFLA_INFO_SLAVE_DATA
],
2859 m_ops
->slave_policy
,
2863 slave_data
= slave_attr
;
2870 if (nlh
->nlmsg_flags
& NLM_F_EXCL
)
2872 if (nlh
->nlmsg_flags
& NLM_F_REPLACE
)
2875 if (linkinfo
[IFLA_INFO_DATA
]) {
2876 if (!ops
|| ops
!= dev
->rtnl_link_ops
||
2880 err
= ops
->changelink(dev
, tb
, data
, extack
);
2883 status
|= DO_SETLINK_NOTIFY
;
2886 if (linkinfo
[IFLA_INFO_SLAVE_DATA
]) {
2887 if (!m_ops
|| !m_ops
->slave_changelink
)
2890 err
= m_ops
->slave_changelink(master_dev
, dev
,
2895 status
|= DO_SETLINK_NOTIFY
;
2898 return do_setlink(skb
, dev
, ifm
, extack
, tb
, ifname
,
2902 if (!(nlh
->nlmsg_flags
& NLM_F_CREATE
)) {
2903 if (ifm
->ifi_index
== 0 && tb
[IFLA_GROUP
])
2904 return rtnl_group_changelink(skb
, net
,
2905 nla_get_u32(tb
[IFLA_GROUP
]),
2910 if (tb
[IFLA_MAP
] || tb
[IFLA_PROTINFO
])
2914 #ifdef CONFIG_MODULES
2917 request_module("rtnl-link-%s", kind
);
2919 ops
= rtnl_link_ops_get(kind
);
2931 snprintf(ifname
, IFNAMSIZ
, "%s%%d", ops
->kind
);
2932 name_assign_type
= NET_NAME_ENUM
;
2935 dest_net
= rtnl_link_get_net_capable(skb
, net
, tb
, CAP_NET_ADMIN
);
2936 if (IS_ERR(dest_net
))
2937 return PTR_ERR(dest_net
);
2939 if (tb
[IFLA_LINK_NETNSID
]) {
2940 int id
= nla_get_s32(tb
[IFLA_LINK_NETNSID
]);
2942 link_net
= get_net_ns_by_id(dest_net
, id
);
2948 if (!netlink_ns_capable(skb
, link_net
->user_ns
, CAP_NET_ADMIN
))
2952 dev
= rtnl_create_link(link_net
? : dest_net
, ifname
,
2953 name_assign_type
, ops
, tb
);
2959 dev
->ifindex
= ifm
->ifi_index
;
2962 err
= ops
->newlink(link_net
? : net
, dev
, tb
, data
,
2964 /* Drivers should call free_netdev() in ->destructor
2965 * and unregister it on failure after registration
2966 * so that device could be finally freed in rtnl_unlock.
2969 /* If device is not registered at all, free it now */
2970 if (dev
->reg_state
== NETREG_UNINITIALIZED
)
2975 err
= register_netdevice(dev
);
2981 err
= rtnl_configure_link(dev
, ifm
);
2983 goto out_unregister
;
2985 err
= dev_change_net_namespace(dev
, dest_net
, ifname
);
2987 goto out_unregister
;
2989 if (tb
[IFLA_MASTER
]) {
2990 err
= do_set_master(dev
, nla_get_u32(tb
[IFLA_MASTER
]),
2993 goto out_unregister
;
3002 LIST_HEAD(list_kill
);
3004 ops
->dellink(dev
, &list_kill
);
3005 unregister_netdevice_many(&list_kill
);
3007 unregister_netdevice(dev
);
3013 static int rtnl_getlink(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
3014 struct netlink_ext_ack
*extack
)
3016 struct net
*net
= sock_net(skb
->sk
);
3017 struct net
*tgt_net
= net
;
3018 struct ifinfomsg
*ifm
;
3019 char ifname
[IFNAMSIZ
];
3020 struct nlattr
*tb
[IFLA_MAX
+1];
3021 struct net_device
*dev
= NULL
;
3022 struct sk_buff
*nskb
;
3025 u32 ext_filter_mask
= 0;
3027 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFLA_MAX
, ifla_policy
, extack
);
3031 err
= rtnl_ensure_unique_netns(tb
, extack
, true);
3035 if (tb
[IFLA_IF_NETNSID
]) {
3036 netnsid
= nla_get_s32(tb
[IFLA_IF_NETNSID
]);
3037 tgt_net
= get_target_net(NETLINK_CB(skb
).sk
, netnsid
);
3038 if (IS_ERR(tgt_net
))
3039 return PTR_ERR(tgt_net
);
3042 if (tb
[IFLA_IFNAME
])
3043 nla_strlcpy(ifname
, tb
[IFLA_IFNAME
], IFNAMSIZ
);
3045 if (tb
[IFLA_EXT_MASK
])
3046 ext_filter_mask
= nla_get_u32(tb
[IFLA_EXT_MASK
]);
3049 ifm
= nlmsg_data(nlh
);
3050 if (ifm
->ifi_index
> 0)
3051 dev
= __dev_get_by_index(tgt_net
, ifm
->ifi_index
);
3052 else if (tb
[IFLA_IFNAME
])
3053 dev
= __dev_get_by_name(tgt_net
, ifname
);
3062 nskb
= nlmsg_new(if_nlmsg_size(dev
, ext_filter_mask
), GFP_KERNEL
);
3066 err
= rtnl_fill_ifinfo(nskb
, dev
, net
,
3067 RTM_NEWLINK
, NETLINK_CB(skb
).portid
,
3068 nlh
->nlmsg_seq
, 0, 0, ext_filter_mask
,
3069 0, NULL
, 0, netnsid
, GFP_KERNEL
);
3071 /* -EMSGSIZE implies BUG in if_nlmsg_size */
3072 WARN_ON(err
== -EMSGSIZE
);
3075 err
= rtnl_unicast(nskb
, net
, NETLINK_CB(skb
).portid
);
3083 static u16
rtnl_calcit(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
3085 struct net
*net
= sock_net(skb
->sk
);
3086 struct net_device
*dev
;
3087 struct nlattr
*tb
[IFLA_MAX
+1];
3088 u32 ext_filter_mask
= 0;
3089 u16 min_ifinfo_dump_size
= 0;
3092 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
3093 hdrlen
= nlmsg_len(nlh
) < sizeof(struct ifinfomsg
) ?
3094 sizeof(struct rtgenmsg
) : sizeof(struct ifinfomsg
);
3096 if (nlmsg_parse(nlh
, hdrlen
, tb
, IFLA_MAX
, ifla_policy
, NULL
) >= 0) {
3097 if (tb
[IFLA_EXT_MASK
])
3098 ext_filter_mask
= nla_get_u32(tb
[IFLA_EXT_MASK
]);
3101 if (!ext_filter_mask
)
3102 return NLMSG_GOODSIZE
;
3104 * traverse the list of net devices and compute the minimum
3105 * buffer size based upon the filter mask.
3108 for_each_netdev_rcu(net
, dev
) {
3109 min_ifinfo_dump_size
= max_t(u16
, min_ifinfo_dump_size
,
3115 return nlmsg_total_size(min_ifinfo_dump_size
);
3118 static int rtnl_dump_all(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3121 int s_idx
= cb
->family
;
3122 int type
= cb
->nlh
->nlmsg_type
- RTM_BASE
;
3127 for (idx
= 1; idx
<= RTNL_FAMILY_MAX
; idx
++) {
3128 struct rtnl_link
*handlers
;
3129 rtnl_dumpit_func dumpit
;
3131 if (idx
< s_idx
|| idx
== PF_PACKET
)
3134 handlers
= rtnl_dereference(rtnl_msg_handlers
[idx
]);
3138 dumpit
= READ_ONCE(handlers
[type
].dumpit
);
3143 memset(&cb
->args
[0], 0, sizeof(cb
->args
));
3147 if (dumpit(skb
, cb
))
3155 struct sk_buff
*rtmsg_ifinfo_build_skb(int type
, struct net_device
*dev
,
3156 unsigned int change
,
3157 u32 event
, gfp_t flags
, int *new_nsid
,
3160 struct net
*net
= dev_net(dev
);
3161 struct sk_buff
*skb
;
3163 size_t if_info_size
;
3165 skb
= nlmsg_new((if_info_size
= if_nlmsg_size(dev
, 0)), flags
);
3169 err
= rtnl_fill_ifinfo(skb
, dev
, dev_net(dev
),
3170 type
, 0, 0, change
, 0, 0, event
,
3171 new_nsid
, new_ifindex
, -1, flags
);
3173 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
3174 WARN_ON(err
== -EMSGSIZE
);
3181 rtnl_set_sk_err(net
, RTNLGRP_LINK
, err
);
3185 void rtmsg_ifinfo_send(struct sk_buff
*skb
, struct net_device
*dev
, gfp_t flags
)
3187 struct net
*net
= dev_net(dev
);
3189 rtnl_notify(skb
, net
, 0, RTNLGRP_LINK
, NULL
, flags
);
3192 static void rtmsg_ifinfo_event(int type
, struct net_device
*dev
,
3193 unsigned int change
, u32 event
,
3194 gfp_t flags
, int *new_nsid
, int new_ifindex
)
3196 struct sk_buff
*skb
;
3198 if (dev
->reg_state
!= NETREG_REGISTERED
)
3201 skb
= rtmsg_ifinfo_build_skb(type
, dev
, change
, event
, flags
, new_nsid
,
3204 rtmsg_ifinfo_send(skb
, dev
, flags
);
3207 void rtmsg_ifinfo(int type
, struct net_device
*dev
, unsigned int change
,
3210 rtmsg_ifinfo_event(type
, dev
, change
, rtnl_get_event(0), flags
,
3214 void rtmsg_ifinfo_newnet(int type
, struct net_device
*dev
, unsigned int change
,
3215 gfp_t flags
, int *new_nsid
, int new_ifindex
)
3217 rtmsg_ifinfo_event(type
, dev
, change
, rtnl_get_event(0), flags
,
3218 new_nsid
, new_ifindex
);
3221 static int nlmsg_populate_fdb_fill(struct sk_buff
*skb
,
3222 struct net_device
*dev
,
3223 u8
*addr
, u16 vid
, u32 pid
, u32 seq
,
3224 int type
, unsigned int flags
,
3225 int nlflags
, u16 ndm_state
)
3227 struct nlmsghdr
*nlh
;
3230 nlh
= nlmsg_put(skb
, pid
, seq
, type
, sizeof(*ndm
), nlflags
);
3234 ndm
= nlmsg_data(nlh
);
3235 ndm
->ndm_family
= AF_BRIDGE
;
3238 ndm
->ndm_flags
= flags
;
3240 ndm
->ndm_ifindex
= dev
->ifindex
;
3241 ndm
->ndm_state
= ndm_state
;
3243 if (nla_put(skb
, NDA_LLADDR
, ETH_ALEN
, addr
))
3244 goto nla_put_failure
;
3246 if (nla_put(skb
, NDA_VLAN
, sizeof(u16
), &vid
))
3247 goto nla_put_failure
;
3249 nlmsg_end(skb
, nlh
);
3253 nlmsg_cancel(skb
, nlh
);
3257 static inline size_t rtnl_fdb_nlmsg_size(void)
3259 return NLMSG_ALIGN(sizeof(struct ndmsg
)) +
3260 nla_total_size(ETH_ALEN
) + /* NDA_LLADDR */
3261 nla_total_size(sizeof(u16
)) + /* NDA_VLAN */
3265 static void rtnl_fdb_notify(struct net_device
*dev
, u8
*addr
, u16 vid
, int type
,
3268 struct net
*net
= dev_net(dev
);
3269 struct sk_buff
*skb
;
3272 skb
= nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC
);
3276 err
= nlmsg_populate_fdb_fill(skb
, dev
, addr
, vid
,
3277 0, 0, type
, NTF_SELF
, 0, ndm_state
);
3283 rtnl_notify(skb
, net
, 0, RTNLGRP_NEIGH
, NULL
, GFP_ATOMIC
);
3286 rtnl_set_sk_err(net
, RTNLGRP_NEIGH
, err
);
3290 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
3292 int ndo_dflt_fdb_add(struct ndmsg
*ndm
,
3293 struct nlattr
*tb
[],
3294 struct net_device
*dev
,
3295 const unsigned char *addr
, u16 vid
,
3300 /* If aging addresses are supported device will need to
3301 * implement its own handler for this.
3303 if (ndm
->ndm_state
&& !(ndm
->ndm_state
& NUD_PERMANENT
)) {
3304 pr_info("%s: FDB only supports static addresses\n", dev
->name
);
3309 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev
->name
);
3313 if (is_unicast_ether_addr(addr
) || is_link_local_ether_addr(addr
))
3314 err
= dev_uc_add_excl(dev
, addr
);
3315 else if (is_multicast_ether_addr(addr
))
3316 err
= dev_mc_add_excl(dev
, addr
);
3318 /* Only return duplicate errors if NLM_F_EXCL is set */
3319 if (err
== -EEXIST
&& !(flags
& NLM_F_EXCL
))
3324 EXPORT_SYMBOL(ndo_dflt_fdb_add
);
3326 static int fdb_vid_parse(struct nlattr
*vlan_attr
, u16
*p_vid
,
3327 struct netlink_ext_ack
*extack
)
3332 if (nla_len(vlan_attr
) != sizeof(u16
)) {
3333 NL_SET_ERR_MSG(extack
, "invalid vlan attribute size");
3337 vid
= nla_get_u16(vlan_attr
);
3339 if (!vid
|| vid
>= VLAN_VID_MASK
) {
3340 NL_SET_ERR_MSG(extack
, "invalid vlan id");
3348 static int rtnl_fdb_add(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
3349 struct netlink_ext_ack
*extack
)
3351 struct net
*net
= sock_net(skb
->sk
);
3353 struct nlattr
*tb
[NDA_MAX
+1];
3354 struct net_device
*dev
;
3359 err
= nlmsg_parse(nlh
, sizeof(*ndm
), tb
, NDA_MAX
, NULL
, extack
);
3363 ndm
= nlmsg_data(nlh
);
3364 if (ndm
->ndm_ifindex
== 0) {
3365 NL_SET_ERR_MSG(extack
, "invalid ifindex");
3369 dev
= __dev_get_by_index(net
, ndm
->ndm_ifindex
);
3371 NL_SET_ERR_MSG(extack
, "unknown ifindex");
3375 if (!tb
[NDA_LLADDR
] || nla_len(tb
[NDA_LLADDR
]) != ETH_ALEN
) {
3376 NL_SET_ERR_MSG(extack
, "invalid address");
3380 if (dev
->type
!= ARPHRD_ETHER
) {
3381 NL_SET_ERR_MSG(extack
, "FDB add only supported for Ethernet devices");
3385 addr
= nla_data(tb
[NDA_LLADDR
]);
3387 err
= fdb_vid_parse(tb
[NDA_VLAN
], &vid
, extack
);
3393 /* Support fdb on master device the net/bridge default case */
3394 if ((!ndm
->ndm_flags
|| ndm
->ndm_flags
& NTF_MASTER
) &&
3395 (dev
->priv_flags
& IFF_BRIDGE_PORT
)) {
3396 struct net_device
*br_dev
= netdev_master_upper_dev_get(dev
);
3397 const struct net_device_ops
*ops
= br_dev
->netdev_ops
;
3399 err
= ops
->ndo_fdb_add(ndm
, tb
, dev
, addr
, vid
,
3404 ndm
->ndm_flags
&= ~NTF_MASTER
;
3407 /* Embedded bridge, macvlan, and any other device support */
3408 if ((ndm
->ndm_flags
& NTF_SELF
)) {
3409 if (dev
->netdev_ops
->ndo_fdb_add
)
3410 err
= dev
->netdev_ops
->ndo_fdb_add(ndm
, tb
, dev
, addr
,
3414 err
= ndo_dflt_fdb_add(ndm
, tb
, dev
, addr
, vid
,
3418 rtnl_fdb_notify(dev
, addr
, vid
, RTM_NEWNEIGH
,
3420 ndm
->ndm_flags
&= ~NTF_SELF
;
3428 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
3430 int ndo_dflt_fdb_del(struct ndmsg
*ndm
,
3431 struct nlattr
*tb
[],
3432 struct net_device
*dev
,
3433 const unsigned char *addr
, u16 vid
)
3437 /* If aging addresses are supported device will need to
3438 * implement its own handler for this.
3440 if (!(ndm
->ndm_state
& NUD_PERMANENT
)) {
3441 pr_info("%s: FDB only supports static addresses\n", dev
->name
);
3445 if (is_unicast_ether_addr(addr
) || is_link_local_ether_addr(addr
))
3446 err
= dev_uc_del(dev
, addr
);
3447 else if (is_multicast_ether_addr(addr
))
3448 err
= dev_mc_del(dev
, addr
);
3452 EXPORT_SYMBOL(ndo_dflt_fdb_del
);
3454 static int rtnl_fdb_del(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
3455 struct netlink_ext_ack
*extack
)
3457 struct net
*net
= sock_net(skb
->sk
);
3459 struct nlattr
*tb
[NDA_MAX
+1];
3460 struct net_device
*dev
;
3465 if (!netlink_capable(skb
, CAP_NET_ADMIN
))
3468 err
= nlmsg_parse(nlh
, sizeof(*ndm
), tb
, NDA_MAX
, NULL
, extack
);
3472 ndm
= nlmsg_data(nlh
);
3473 if (ndm
->ndm_ifindex
== 0) {
3474 NL_SET_ERR_MSG(extack
, "invalid ifindex");
3478 dev
= __dev_get_by_index(net
, ndm
->ndm_ifindex
);
3480 NL_SET_ERR_MSG(extack
, "unknown ifindex");
3484 if (!tb
[NDA_LLADDR
] || nla_len(tb
[NDA_LLADDR
]) != ETH_ALEN
) {
3485 NL_SET_ERR_MSG(extack
, "invalid address");
3489 if (dev
->type
!= ARPHRD_ETHER
) {
3490 NL_SET_ERR_MSG(extack
, "FDB delete only supported for Ethernet devices");
3494 addr
= nla_data(tb
[NDA_LLADDR
]);
3496 err
= fdb_vid_parse(tb
[NDA_VLAN
], &vid
, extack
);
3502 /* Support fdb on master device the net/bridge default case */
3503 if ((!ndm
->ndm_flags
|| ndm
->ndm_flags
& NTF_MASTER
) &&
3504 (dev
->priv_flags
& IFF_BRIDGE_PORT
)) {
3505 struct net_device
*br_dev
= netdev_master_upper_dev_get(dev
);
3506 const struct net_device_ops
*ops
= br_dev
->netdev_ops
;
3508 if (ops
->ndo_fdb_del
)
3509 err
= ops
->ndo_fdb_del(ndm
, tb
, dev
, addr
, vid
);
3514 ndm
->ndm_flags
&= ~NTF_MASTER
;
3517 /* Embedded bridge, macvlan, and any other device support */
3518 if (ndm
->ndm_flags
& NTF_SELF
) {
3519 if (dev
->netdev_ops
->ndo_fdb_del
)
3520 err
= dev
->netdev_ops
->ndo_fdb_del(ndm
, tb
, dev
, addr
,
3523 err
= ndo_dflt_fdb_del(ndm
, tb
, dev
, addr
, vid
);
3526 rtnl_fdb_notify(dev
, addr
, vid
, RTM_DELNEIGH
,
3528 ndm
->ndm_flags
&= ~NTF_SELF
;
3535 static int nlmsg_populate_fdb(struct sk_buff
*skb
,
3536 struct netlink_callback
*cb
,
3537 struct net_device
*dev
,
3539 struct netdev_hw_addr_list
*list
)
3541 struct netdev_hw_addr
*ha
;
3545 portid
= NETLINK_CB(cb
->skb
).portid
;
3546 seq
= cb
->nlh
->nlmsg_seq
;
3548 list_for_each_entry(ha
, &list
->list
, list
) {
3549 if (*idx
< cb
->args
[2])
3552 err
= nlmsg_populate_fdb_fill(skb
, dev
, ha
->addr
, 0,
3554 RTM_NEWNEIGH
, NTF_SELF
,
3555 NLM_F_MULTI
, NUD_PERMANENT
);
3565 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
3566 * @nlh: netlink message header
3569 * Default netdevice operation to dump the existing unicast address list.
3570 * Returns number of addresses from list put in skb.
3572 int ndo_dflt_fdb_dump(struct sk_buff
*skb
,
3573 struct netlink_callback
*cb
,
3574 struct net_device
*dev
,
3575 struct net_device
*filter_dev
,
3580 if (dev
->type
!= ARPHRD_ETHER
)
3583 netif_addr_lock_bh(dev
);
3584 err
= nlmsg_populate_fdb(skb
, cb
, dev
, idx
, &dev
->uc
);
3587 err
= nlmsg_populate_fdb(skb
, cb
, dev
, idx
, &dev
->mc
);
3589 netif_addr_unlock_bh(dev
);
3592 EXPORT_SYMBOL(ndo_dflt_fdb_dump
);
3594 static int rtnl_fdb_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3596 struct net_device
*dev
;
3597 struct nlattr
*tb
[IFLA_MAX
+1];
3598 struct net_device
*br_dev
= NULL
;
3599 const struct net_device_ops
*ops
= NULL
;
3600 const struct net_device_ops
*cops
= NULL
;
3601 struct ifinfomsg
*ifm
= nlmsg_data(cb
->nlh
);
3602 struct net
*net
= sock_net(skb
->sk
);
3603 struct hlist_head
*head
;
3611 /* A hack to preserve kernel<->userspace interface.
3612 * Before Linux v4.12 this code accepted ndmsg since iproute2 v3.3.0.
3613 * However, ndmsg is shorter than ifinfomsg thus nlmsg_parse() bails.
3614 * So, check for ndmsg with an optional u32 attribute (not used here).
3615 * Fortunately these sizes don't conflict with the size of ifinfomsg
3616 * with an optional attribute.
3618 if (nlmsg_len(cb
->nlh
) != sizeof(struct ndmsg
) &&
3619 (nlmsg_len(cb
->nlh
) != sizeof(struct ndmsg
) +
3620 nla_attr_size(sizeof(u32
)))) {
3621 err
= nlmsg_parse(cb
->nlh
, sizeof(struct ifinfomsg
), tb
,
3622 IFLA_MAX
, ifla_policy
, NULL
);
3625 } else if (err
== 0) {
3626 if (tb
[IFLA_MASTER
])
3627 br_idx
= nla_get_u32(tb
[IFLA_MASTER
]);
3630 brport_idx
= ifm
->ifi_index
;
3634 br_dev
= __dev_get_by_index(net
, br_idx
);
3638 ops
= br_dev
->netdev_ops
;
3642 s_idx
= cb
->args
[1];
3644 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
3646 head
= &net
->dev_index_head
[h
];
3647 hlist_for_each_entry(dev
, head
, index_hlist
) {
3649 if (brport_idx
&& (dev
->ifindex
!= brport_idx
))
3652 if (!br_idx
) { /* user did not specify a specific bridge */
3653 if (dev
->priv_flags
& IFF_BRIDGE_PORT
) {
3654 br_dev
= netdev_master_upper_dev_get(dev
);
3655 cops
= br_dev
->netdev_ops
;
3658 if (dev
!= br_dev
&&
3659 !(dev
->priv_flags
& IFF_BRIDGE_PORT
))
3662 if (br_dev
!= netdev_master_upper_dev_get(dev
) &&
3663 !(dev
->priv_flags
& IFF_EBRIDGE
))
3671 if (dev
->priv_flags
& IFF_BRIDGE_PORT
) {
3672 if (cops
&& cops
->ndo_fdb_dump
) {
3673 err
= cops
->ndo_fdb_dump(skb
, cb
,
3676 if (err
== -EMSGSIZE
)
3681 if (dev
->netdev_ops
->ndo_fdb_dump
)
3682 err
= dev
->netdev_ops
->ndo_fdb_dump(skb
, cb
,
3686 err
= ndo_dflt_fdb_dump(skb
, cb
, dev
, NULL
,
3688 if (err
== -EMSGSIZE
)
3693 /* reset fdb offset to 0 for rest of the interfaces */
3709 static int brport_nla_put_flag(struct sk_buff
*skb
, u32 flags
, u32 mask
,
3710 unsigned int attrnum
, unsigned int flag
)
3713 return nla_put_u8(skb
, attrnum
, !!(flags
& flag
));
3717 int ndo_dflt_bridge_getlink(struct sk_buff
*skb
, u32 pid
, u32 seq
,
3718 struct net_device
*dev
, u16 mode
,
3719 u32 flags
, u32 mask
, int nlflags
,
3721 int (*vlan_fill
)(struct sk_buff
*skb
,
3722 struct net_device
*dev
,
3725 struct nlmsghdr
*nlh
;
3726 struct ifinfomsg
*ifm
;
3727 struct nlattr
*br_afspec
;
3728 struct nlattr
*protinfo
;
3729 u8 operstate
= netif_running(dev
) ? dev
->operstate
: IF_OPER_DOWN
;
3730 struct net_device
*br_dev
= netdev_master_upper_dev_get(dev
);
3733 nlh
= nlmsg_put(skb
, pid
, seq
, RTM_NEWLINK
, sizeof(*ifm
), nlflags
);
3737 ifm
= nlmsg_data(nlh
);
3738 ifm
->ifi_family
= AF_BRIDGE
;
3740 ifm
->ifi_type
= dev
->type
;
3741 ifm
->ifi_index
= dev
->ifindex
;
3742 ifm
->ifi_flags
= dev_get_flags(dev
);
3743 ifm
->ifi_change
= 0;
3746 if (nla_put_string(skb
, IFLA_IFNAME
, dev
->name
) ||
3747 nla_put_u32(skb
, IFLA_MTU
, dev
->mtu
) ||
3748 nla_put_u8(skb
, IFLA_OPERSTATE
, operstate
) ||
3750 nla_put_u32(skb
, IFLA_MASTER
, br_dev
->ifindex
)) ||
3752 nla_put(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
)) ||
3753 (dev
->ifindex
!= dev_get_iflink(dev
) &&
3754 nla_put_u32(skb
, IFLA_LINK
, dev_get_iflink(dev
))))
3755 goto nla_put_failure
;
3757 br_afspec
= nla_nest_start(skb
, IFLA_AF_SPEC
);
3759 goto nla_put_failure
;
3761 if (nla_put_u16(skb
, IFLA_BRIDGE_FLAGS
, BRIDGE_FLAGS_SELF
)) {
3762 nla_nest_cancel(skb
, br_afspec
);
3763 goto nla_put_failure
;
3766 if (mode
!= BRIDGE_MODE_UNDEF
) {
3767 if (nla_put_u16(skb
, IFLA_BRIDGE_MODE
, mode
)) {
3768 nla_nest_cancel(skb
, br_afspec
);
3769 goto nla_put_failure
;
3773 err
= vlan_fill(skb
, dev
, filter_mask
);
3775 nla_nest_cancel(skb
, br_afspec
);
3776 goto nla_put_failure
;
3779 nla_nest_end(skb
, br_afspec
);
3781 protinfo
= nla_nest_start(skb
, IFLA_PROTINFO
| NLA_F_NESTED
);
3783 goto nla_put_failure
;
3785 if (brport_nla_put_flag(skb
, flags
, mask
,
3786 IFLA_BRPORT_MODE
, BR_HAIRPIN_MODE
) ||
3787 brport_nla_put_flag(skb
, flags
, mask
,
3788 IFLA_BRPORT_GUARD
, BR_BPDU_GUARD
) ||
3789 brport_nla_put_flag(skb
, flags
, mask
,
3790 IFLA_BRPORT_FAST_LEAVE
,
3791 BR_MULTICAST_FAST_LEAVE
) ||
3792 brport_nla_put_flag(skb
, flags
, mask
,
3793 IFLA_BRPORT_PROTECT
, BR_ROOT_BLOCK
) ||
3794 brport_nla_put_flag(skb
, flags
, mask
,
3795 IFLA_BRPORT_LEARNING
, BR_LEARNING
) ||
3796 brport_nla_put_flag(skb
, flags
, mask
,
3797 IFLA_BRPORT_LEARNING_SYNC
, BR_LEARNING_SYNC
) ||
3798 brport_nla_put_flag(skb
, flags
, mask
,
3799 IFLA_BRPORT_UNICAST_FLOOD
, BR_FLOOD
) ||
3800 brport_nla_put_flag(skb
, flags
, mask
,
3801 IFLA_BRPORT_PROXYARP
, BR_PROXYARP
)) {
3802 nla_nest_cancel(skb
, protinfo
);
3803 goto nla_put_failure
;
3806 nla_nest_end(skb
, protinfo
);
3808 nlmsg_end(skb
, nlh
);
3811 nlmsg_cancel(skb
, nlh
);
3812 return err
? err
: -EMSGSIZE
;
3814 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink
);
3816 static int rtnl_bridge_getlink(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3818 struct net
*net
= sock_net(skb
->sk
);
3819 struct net_device
*dev
;
3821 u32 portid
= NETLINK_CB(cb
->skb
).portid
;
3822 u32 seq
= cb
->nlh
->nlmsg_seq
;
3823 u32 filter_mask
= 0;
3826 if (nlmsg_len(cb
->nlh
) > sizeof(struct ifinfomsg
)) {
3827 struct nlattr
*extfilt
;
3829 extfilt
= nlmsg_find_attr(cb
->nlh
, sizeof(struct ifinfomsg
),
3832 if (nla_len(extfilt
) < sizeof(filter_mask
))
3835 filter_mask
= nla_get_u32(extfilt
);
3840 for_each_netdev_rcu(net
, dev
) {
3841 const struct net_device_ops
*ops
= dev
->netdev_ops
;
3842 struct net_device
*br_dev
= netdev_master_upper_dev_get(dev
);
3844 if (br_dev
&& br_dev
->netdev_ops
->ndo_bridge_getlink
) {
3845 if (idx
>= cb
->args
[0]) {
3846 err
= br_dev
->netdev_ops
->ndo_bridge_getlink(
3847 skb
, portid
, seq
, dev
,
3848 filter_mask
, NLM_F_MULTI
);
3849 if (err
< 0 && err
!= -EOPNOTSUPP
) {
3850 if (likely(skb
->len
))
3859 if (ops
->ndo_bridge_getlink
) {
3860 if (idx
>= cb
->args
[0]) {
3861 err
= ops
->ndo_bridge_getlink(skb
, portid
,
3865 if (err
< 0 && err
!= -EOPNOTSUPP
) {
3866 if (likely(skb
->len
))
3883 static inline size_t bridge_nlmsg_size(void)
3885 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
3886 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
3887 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
3888 + nla_total_size(sizeof(u32
)) /* IFLA_MASTER */
3889 + nla_total_size(sizeof(u32
)) /* IFLA_MTU */
3890 + nla_total_size(sizeof(u32
)) /* IFLA_LINK */
3891 + nla_total_size(sizeof(u32
)) /* IFLA_OPERSTATE */
3892 + nla_total_size(sizeof(u8
)) /* IFLA_PROTINFO */
3893 + nla_total_size(sizeof(struct nlattr
)) /* IFLA_AF_SPEC */
3894 + nla_total_size(sizeof(u16
)) /* IFLA_BRIDGE_FLAGS */
3895 + nla_total_size(sizeof(u16
)); /* IFLA_BRIDGE_MODE */
3898 static int rtnl_bridge_notify(struct net_device
*dev
)
3900 struct net
*net
= dev_net(dev
);
3901 struct sk_buff
*skb
;
3902 int err
= -EOPNOTSUPP
;
3904 if (!dev
->netdev_ops
->ndo_bridge_getlink
)
3907 skb
= nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC
);
3913 err
= dev
->netdev_ops
->ndo_bridge_getlink(skb
, 0, 0, dev
, 0, 0);
3920 rtnl_notify(skb
, net
, 0, RTNLGRP_LINK
, NULL
, GFP_ATOMIC
);
3923 WARN_ON(err
== -EMSGSIZE
);
3926 rtnl_set_sk_err(net
, RTNLGRP_LINK
, err
);
3930 static int rtnl_bridge_setlink(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
3931 struct netlink_ext_ack
*extack
)
3933 struct net
*net
= sock_net(skb
->sk
);
3934 struct ifinfomsg
*ifm
;
3935 struct net_device
*dev
;
3936 struct nlattr
*br_spec
, *attr
= NULL
;
3937 int rem
, err
= -EOPNOTSUPP
;
3939 bool have_flags
= false;
3941 if (nlmsg_len(nlh
) < sizeof(*ifm
))
3944 ifm
= nlmsg_data(nlh
);
3945 if (ifm
->ifi_family
!= AF_BRIDGE
)
3946 return -EPFNOSUPPORT
;
3948 dev
= __dev_get_by_index(net
, ifm
->ifi_index
);
3950 NL_SET_ERR_MSG(extack
, "unknown ifindex");
3954 br_spec
= nlmsg_find_attr(nlh
, sizeof(struct ifinfomsg
), IFLA_AF_SPEC
);
3956 nla_for_each_nested(attr
, br_spec
, rem
) {
3957 if (nla_type(attr
) == IFLA_BRIDGE_FLAGS
) {
3958 if (nla_len(attr
) < sizeof(flags
))
3962 flags
= nla_get_u16(attr
);
3968 if (!flags
|| (flags
& BRIDGE_FLAGS_MASTER
)) {
3969 struct net_device
*br_dev
= netdev_master_upper_dev_get(dev
);
3971 if (!br_dev
|| !br_dev
->netdev_ops
->ndo_bridge_setlink
) {
3976 err
= br_dev
->netdev_ops
->ndo_bridge_setlink(dev
, nlh
, flags
);
3980 flags
&= ~BRIDGE_FLAGS_MASTER
;
3983 if ((flags
& BRIDGE_FLAGS_SELF
)) {
3984 if (!dev
->netdev_ops
->ndo_bridge_setlink
)
3987 err
= dev
->netdev_ops
->ndo_bridge_setlink(dev
, nlh
,
3990 flags
&= ~BRIDGE_FLAGS_SELF
;
3992 /* Generate event to notify upper layer of bridge
3995 err
= rtnl_bridge_notify(dev
);
4000 memcpy(nla_data(attr
), &flags
, sizeof(flags
));
4005 static int rtnl_bridge_dellink(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
4006 struct netlink_ext_ack
*extack
)
4008 struct net
*net
= sock_net(skb
->sk
);
4009 struct ifinfomsg
*ifm
;
4010 struct net_device
*dev
;
4011 struct nlattr
*br_spec
, *attr
= NULL
;
4012 int rem
, err
= -EOPNOTSUPP
;
4014 bool have_flags
= false;
4016 if (nlmsg_len(nlh
) < sizeof(*ifm
))
4019 ifm
= nlmsg_data(nlh
);
4020 if (ifm
->ifi_family
!= AF_BRIDGE
)
4021 return -EPFNOSUPPORT
;
4023 dev
= __dev_get_by_index(net
, ifm
->ifi_index
);
4025 NL_SET_ERR_MSG(extack
, "unknown ifindex");
4029 br_spec
= nlmsg_find_attr(nlh
, sizeof(struct ifinfomsg
), IFLA_AF_SPEC
);
4031 nla_for_each_nested(attr
, br_spec
, rem
) {
4032 if (nla_type(attr
) == IFLA_BRIDGE_FLAGS
) {
4033 if (nla_len(attr
) < sizeof(flags
))
4037 flags
= nla_get_u16(attr
);
4043 if (!flags
|| (flags
& BRIDGE_FLAGS_MASTER
)) {
4044 struct net_device
*br_dev
= netdev_master_upper_dev_get(dev
);
4046 if (!br_dev
|| !br_dev
->netdev_ops
->ndo_bridge_dellink
) {
4051 err
= br_dev
->netdev_ops
->ndo_bridge_dellink(dev
, nlh
, flags
);
4055 flags
&= ~BRIDGE_FLAGS_MASTER
;
4058 if ((flags
& BRIDGE_FLAGS_SELF
)) {
4059 if (!dev
->netdev_ops
->ndo_bridge_dellink
)
4062 err
= dev
->netdev_ops
->ndo_bridge_dellink(dev
, nlh
,
4066 flags
&= ~BRIDGE_FLAGS_SELF
;
4068 /* Generate event to notify upper layer of bridge
4071 err
= rtnl_bridge_notify(dev
);
4076 memcpy(nla_data(attr
), &flags
, sizeof(flags
));
4081 static bool stats_attr_valid(unsigned int mask
, int attrid
, int idxattr
)
4083 return (mask
& IFLA_STATS_FILTER_BIT(attrid
)) &&
4084 (!idxattr
|| idxattr
== attrid
);
4087 #define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1)
4088 static int rtnl_get_offload_stats_attr_size(int attr_id
)
4091 case IFLA_OFFLOAD_XSTATS_CPU_HIT
:
4092 return sizeof(struct rtnl_link_stats64
);
4098 static int rtnl_get_offload_stats(struct sk_buff
*skb
, struct net_device
*dev
,
4101 struct nlattr
*attr
= NULL
;
4106 if (!(dev
->netdev_ops
&& dev
->netdev_ops
->ndo_has_offload_stats
&&
4107 dev
->netdev_ops
->ndo_get_offload_stats
))
4110 for (attr_id
= IFLA_OFFLOAD_XSTATS_FIRST
;
4111 attr_id
<= IFLA_OFFLOAD_XSTATS_MAX
; attr_id
++) {
4112 if (attr_id
< *prividx
)
4115 size
= rtnl_get_offload_stats_attr_size(attr_id
);
4119 if (!dev
->netdev_ops
->ndo_has_offload_stats(dev
, attr_id
))
4122 attr
= nla_reserve_64bit(skb
, attr_id
, size
,
4123 IFLA_OFFLOAD_XSTATS_UNSPEC
);
4125 goto nla_put_failure
;
4127 attr_data
= nla_data(attr
);
4128 memset(attr_data
, 0, size
);
4129 err
= dev
->netdev_ops
->ndo_get_offload_stats(attr_id
, dev
,
4132 goto get_offload_stats_failure
;
4143 get_offload_stats_failure
:
4148 static int rtnl_get_offload_stats_size(const struct net_device
*dev
)
4154 if (!(dev
->netdev_ops
&& dev
->netdev_ops
->ndo_has_offload_stats
&&
4155 dev
->netdev_ops
->ndo_get_offload_stats
))
4158 for (attr_id
= IFLA_OFFLOAD_XSTATS_FIRST
;
4159 attr_id
<= IFLA_OFFLOAD_XSTATS_MAX
; attr_id
++) {
4160 if (!dev
->netdev_ops
->ndo_has_offload_stats(dev
, attr_id
))
4162 size
= rtnl_get_offload_stats_attr_size(attr_id
);
4163 nla_size
+= nla_total_size_64bit(size
);
4167 nla_size
+= nla_total_size(0);
4172 static int rtnl_fill_statsinfo(struct sk_buff
*skb
, struct net_device
*dev
,
4173 int type
, u32 pid
, u32 seq
, u32 change
,
4174 unsigned int flags
, unsigned int filter_mask
,
4175 int *idxattr
, int *prividx
)
4177 struct if_stats_msg
*ifsm
;
4178 struct nlmsghdr
*nlh
;
4179 struct nlattr
*attr
;
4180 int s_prividx
= *prividx
;
4185 nlh
= nlmsg_put(skb
, pid
, seq
, type
, sizeof(*ifsm
), flags
);
4189 ifsm
= nlmsg_data(nlh
);
4190 ifsm
->family
= PF_UNSPEC
;
4193 ifsm
->ifindex
= dev
->ifindex
;
4194 ifsm
->filter_mask
= filter_mask
;
4196 if (stats_attr_valid(filter_mask
, IFLA_STATS_LINK_64
, *idxattr
)) {
4197 struct rtnl_link_stats64
*sp
;
4199 attr
= nla_reserve_64bit(skb
, IFLA_STATS_LINK_64
,
4200 sizeof(struct rtnl_link_stats64
),
4203 goto nla_put_failure
;
4205 sp
= nla_data(attr
);
4206 dev_get_stats(dev
, sp
);
4209 if (stats_attr_valid(filter_mask
, IFLA_STATS_LINK_XSTATS
, *idxattr
)) {
4210 const struct rtnl_link_ops
*ops
= dev
->rtnl_link_ops
;
4212 if (ops
&& ops
->fill_linkxstats
) {
4213 *idxattr
= IFLA_STATS_LINK_XSTATS
;
4214 attr
= nla_nest_start(skb
,
4215 IFLA_STATS_LINK_XSTATS
);
4217 goto nla_put_failure
;
4219 err
= ops
->fill_linkxstats(skb
, dev
, prividx
, *idxattr
);
4220 nla_nest_end(skb
, attr
);
4222 goto nla_put_failure
;
4227 if (stats_attr_valid(filter_mask
, IFLA_STATS_LINK_XSTATS_SLAVE
,
4229 const struct rtnl_link_ops
*ops
= NULL
;
4230 const struct net_device
*master
;
4232 master
= netdev_master_upper_dev_get(dev
);
4234 ops
= master
->rtnl_link_ops
;
4235 if (ops
&& ops
->fill_linkxstats
) {
4236 *idxattr
= IFLA_STATS_LINK_XSTATS_SLAVE
;
4237 attr
= nla_nest_start(skb
,
4238 IFLA_STATS_LINK_XSTATS_SLAVE
);
4240 goto nla_put_failure
;
4242 err
= ops
->fill_linkxstats(skb
, dev
, prividx
, *idxattr
);
4243 nla_nest_end(skb
, attr
);
4245 goto nla_put_failure
;
4250 if (stats_attr_valid(filter_mask
, IFLA_STATS_LINK_OFFLOAD_XSTATS
,
4252 *idxattr
= IFLA_STATS_LINK_OFFLOAD_XSTATS
;
4253 attr
= nla_nest_start(skb
, IFLA_STATS_LINK_OFFLOAD_XSTATS
);
4255 goto nla_put_failure
;
4257 err
= rtnl_get_offload_stats(skb
, dev
, prividx
);
4258 if (err
== -ENODATA
)
4259 nla_nest_cancel(skb
, attr
);
4261 nla_nest_end(skb
, attr
);
4263 if (err
&& err
!= -ENODATA
)
4264 goto nla_put_failure
;
4268 if (stats_attr_valid(filter_mask
, IFLA_STATS_AF_SPEC
, *idxattr
)) {
4269 struct rtnl_af_ops
*af_ops
;
4271 *idxattr
= IFLA_STATS_AF_SPEC
;
4272 attr
= nla_nest_start(skb
, IFLA_STATS_AF_SPEC
);
4274 goto nla_put_failure
;
4277 list_for_each_entry_rcu(af_ops
, &rtnl_af_ops
, list
) {
4278 if (af_ops
->fill_stats_af
) {
4282 af
= nla_nest_start(skb
, af_ops
->family
);
4285 goto nla_put_failure
;
4287 err
= af_ops
->fill_stats_af(skb
, dev
);
4289 if (err
== -ENODATA
) {
4290 nla_nest_cancel(skb
, af
);
4291 } else if (err
< 0) {
4293 goto nla_put_failure
;
4296 nla_nest_end(skb
, af
);
4301 nla_nest_end(skb
, attr
);
4306 nlmsg_end(skb
, nlh
);
4311 /* not a multi message or no progress mean a real error */
4312 if (!(flags
& NLM_F_MULTI
) || s_prividx
== *prividx
)
4313 nlmsg_cancel(skb
, nlh
);
4315 nlmsg_end(skb
, nlh
);
4320 static size_t if_nlmsg_stats_size(const struct net_device
*dev
,
4325 if (stats_attr_valid(filter_mask
, IFLA_STATS_LINK_64
, 0))
4326 size
+= nla_total_size_64bit(sizeof(struct rtnl_link_stats64
));
4328 if (stats_attr_valid(filter_mask
, IFLA_STATS_LINK_XSTATS
, 0)) {
4329 const struct rtnl_link_ops
*ops
= dev
->rtnl_link_ops
;
4330 int attr
= IFLA_STATS_LINK_XSTATS
;
4332 if (ops
&& ops
->get_linkxstats_size
) {
4333 size
+= nla_total_size(ops
->get_linkxstats_size(dev
,
4335 /* for IFLA_STATS_LINK_XSTATS */
4336 size
+= nla_total_size(0);
4340 if (stats_attr_valid(filter_mask
, IFLA_STATS_LINK_XSTATS_SLAVE
, 0)) {
4341 struct net_device
*_dev
= (struct net_device
*)dev
;
4342 const struct rtnl_link_ops
*ops
= NULL
;
4343 const struct net_device
*master
;
4345 /* netdev_master_upper_dev_get can't take const */
4346 master
= netdev_master_upper_dev_get(_dev
);
4348 ops
= master
->rtnl_link_ops
;
4349 if (ops
&& ops
->get_linkxstats_size
) {
4350 int attr
= IFLA_STATS_LINK_XSTATS_SLAVE
;
4352 size
+= nla_total_size(ops
->get_linkxstats_size(dev
,
4354 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
4355 size
+= nla_total_size(0);
4359 if (stats_attr_valid(filter_mask
, IFLA_STATS_LINK_OFFLOAD_XSTATS
, 0))
4360 size
+= rtnl_get_offload_stats_size(dev
);
4362 if (stats_attr_valid(filter_mask
, IFLA_STATS_AF_SPEC
, 0)) {
4363 struct rtnl_af_ops
*af_ops
;
4365 /* for IFLA_STATS_AF_SPEC */
4366 size
+= nla_total_size(0);
4369 list_for_each_entry_rcu(af_ops
, &rtnl_af_ops
, list
) {
4370 if (af_ops
->get_stats_af_size
) {
4371 size
+= nla_total_size(
4372 af_ops
->get_stats_af_size(dev
));
4375 size
+= nla_total_size(0);
4384 static int rtnl_stats_get(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
4385 struct netlink_ext_ack
*extack
)
4387 struct net
*net
= sock_net(skb
->sk
);
4388 struct net_device
*dev
= NULL
;
4389 int idxattr
= 0, prividx
= 0;
4390 struct if_stats_msg
*ifsm
;
4391 struct sk_buff
*nskb
;
4395 if (nlmsg_len(nlh
) < sizeof(*ifsm
))
4398 ifsm
= nlmsg_data(nlh
);
4399 if (ifsm
->ifindex
> 0)
4400 dev
= __dev_get_by_index(net
, ifsm
->ifindex
);
4407 filter_mask
= ifsm
->filter_mask
;
4411 nskb
= nlmsg_new(if_nlmsg_stats_size(dev
, filter_mask
), GFP_KERNEL
);
4415 err
= rtnl_fill_statsinfo(nskb
, dev
, RTM_NEWSTATS
,
4416 NETLINK_CB(skb
).portid
, nlh
->nlmsg_seq
, 0,
4417 0, filter_mask
, &idxattr
, &prividx
);
4419 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
4420 WARN_ON(err
== -EMSGSIZE
);
4423 err
= rtnl_unicast(nskb
, net
, NETLINK_CB(skb
).portid
);
4429 static int rtnl_stats_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4431 int h
, s_h
, err
, s_idx
, s_idxattr
, s_prividx
;
4432 struct net
*net
= sock_net(skb
->sk
);
4433 unsigned int flags
= NLM_F_MULTI
;
4434 struct if_stats_msg
*ifsm
;
4435 struct hlist_head
*head
;
4436 struct net_device
*dev
;
4437 u32 filter_mask
= 0;
4441 s_idx
= cb
->args
[1];
4442 s_idxattr
= cb
->args
[2];
4443 s_prividx
= cb
->args
[3];
4445 cb
->seq
= net
->dev_base_seq
;
4447 if (nlmsg_len(cb
->nlh
) < sizeof(*ifsm
))
4450 ifsm
= nlmsg_data(cb
->nlh
);
4451 filter_mask
= ifsm
->filter_mask
;
4455 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
4457 head
= &net
->dev_index_head
[h
];
4458 hlist_for_each_entry(dev
, head
, index_hlist
) {
4461 err
= rtnl_fill_statsinfo(skb
, dev
, RTM_NEWSTATS
,
4462 NETLINK_CB(cb
->skb
).portid
,
4463 cb
->nlh
->nlmsg_seq
, 0,
4465 &s_idxattr
, &s_prividx
);
4466 /* If we ran out of room on the first message,
4469 WARN_ON((err
== -EMSGSIZE
) && (skb
->len
== 0));
4475 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
4481 cb
->args
[3] = s_prividx
;
4482 cb
->args
[2] = s_idxattr
;
4489 /* Process one rtnetlink message. */
4491 static int rtnetlink_rcv_msg(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
4492 struct netlink_ext_ack
*extack
)
4494 struct net
*net
= sock_net(skb
->sk
);
4495 struct rtnl_link
*handlers
;
4496 int err
= -EOPNOTSUPP
;
4497 rtnl_doit_func doit
;
4503 type
= nlh
->nlmsg_type
;
4509 /* All the messages must have at least 1 byte length */
4510 if (nlmsg_len(nlh
) < sizeof(struct rtgenmsg
))
4513 family
= ((struct rtgenmsg
*)nlmsg_data(nlh
))->rtgen_family
;
4516 if (kind
!= 2 && !netlink_net_capable(skb
, CAP_NET_ADMIN
))
4519 if (family
>= ARRAY_SIZE(rtnl_msg_handlers
))
4523 handlers
= rcu_dereference(rtnl_msg_handlers
[family
]);
4526 handlers
= rcu_dereference(rtnl_msg_handlers
[family
]);
4529 if (kind
== 2 && nlh
->nlmsg_flags
&NLM_F_DUMP
) {
4531 rtnl_dumpit_func dumpit
;
4532 u16 min_dump_alloc
= 0;
4534 dumpit
= READ_ONCE(handlers
[type
].dumpit
);
4537 handlers
= rcu_dereference(rtnl_msg_handlers
[PF_UNSPEC
]);
4541 dumpit
= READ_ONCE(handlers
[type
].dumpit
);
4546 refcount_inc(&rtnl_msg_handlers_ref
[family
]);
4548 if (type
== RTM_GETLINK
- RTM_BASE
)
4549 min_dump_alloc
= rtnl_calcit(skb
, nlh
);
4555 struct netlink_dump_control c
= {
4557 .min_dump_alloc
= min_dump_alloc
,
4559 err
= netlink_dump_start(rtnl
, skb
, nlh
, &c
);
4561 refcount_dec(&rtnl_msg_handlers_ref
[family
]);
4565 doit
= READ_ONCE(handlers
[type
].doit
);
4568 handlers
= rcu_dereference(rtnl_msg_handlers
[family
]);
4571 flags
= READ_ONCE(handlers
[type
].flags
);
4572 if (flags
& RTNL_FLAG_DOIT_UNLOCKED
) {
4573 refcount_inc(&rtnl_msg_handlers_ref
[family
]);
4574 doit
= READ_ONCE(handlers
[type
].doit
);
4577 err
= doit(skb
, nlh
, extack
);
4578 refcount_dec(&rtnl_msg_handlers_ref
[family
]);
4585 handlers
= rtnl_dereference(rtnl_msg_handlers
[family
]);
4587 doit
= READ_ONCE(handlers
[type
].doit
);
4589 err
= doit(skb
, nlh
, extack
);
4599 static void rtnetlink_rcv(struct sk_buff
*skb
)
4601 netlink_rcv_skb(skb
, &rtnetlink_rcv_msg
);
4604 static int rtnetlink_bind(struct net
*net
, int group
)
4607 case RTNLGRP_IPV4_MROUTE_R
:
4608 case RTNLGRP_IPV6_MROUTE_R
:
4609 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
4616 static int rtnetlink_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
4618 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
4622 case NETDEV_CHANGEMTU
:
4623 case NETDEV_CHANGEADDR
:
4624 case NETDEV_CHANGENAME
:
4625 case NETDEV_FEAT_CHANGE
:
4626 case NETDEV_BONDING_FAILOVER
:
4627 case NETDEV_POST_TYPE_CHANGE
:
4628 case NETDEV_NOTIFY_PEERS
:
4629 case NETDEV_CHANGEUPPER
:
4630 case NETDEV_RESEND_IGMP
:
4631 case NETDEV_CHANGEINFODATA
:
4632 case NETDEV_CHANGELOWERSTATE
:
4633 case NETDEV_CHANGE_TX_QUEUE_LEN
:
4634 rtmsg_ifinfo_event(RTM_NEWLINK
, dev
, 0, rtnl_get_event(event
),
4635 GFP_KERNEL
, NULL
, 0);
4643 static struct notifier_block rtnetlink_dev_notifier
= {
4644 .notifier_call
= rtnetlink_event
,
4648 static int __net_init
rtnetlink_net_init(struct net
*net
)
4651 struct netlink_kernel_cfg cfg
= {
4652 .groups
= RTNLGRP_MAX
,
4653 .input
= rtnetlink_rcv
,
4654 .cb_mutex
= &rtnl_mutex
,
4655 .flags
= NL_CFG_F_NONROOT_RECV
,
4656 .bind
= rtnetlink_bind
,
4659 sk
= netlink_kernel_create(net
, NETLINK_ROUTE
, &cfg
);
4666 static void __net_exit
rtnetlink_net_exit(struct net
*net
)
4668 netlink_kernel_release(net
->rtnl
);
4672 static struct pernet_operations rtnetlink_net_ops
= {
4673 .init
= rtnetlink_net_init
,
4674 .exit
= rtnetlink_net_exit
,
4677 void __init
rtnetlink_init(void)
4681 for (i
= 0; i
< ARRAY_SIZE(rtnl_msg_handlers_ref
); i
++)
4682 refcount_set(&rtnl_msg_handlers_ref
[i
], 1);
4684 if (register_pernet_subsys(&rtnetlink_net_ops
))
4685 panic("rtnetlink_init: cannot initialize rtnetlink\n");
4687 register_netdevice_notifier(&rtnetlink_dev_notifier
);
4689 rtnl_register(PF_UNSPEC
, RTM_GETLINK
, rtnl_getlink
,
4690 rtnl_dump_ifinfo
, 0);
4691 rtnl_register(PF_UNSPEC
, RTM_SETLINK
, rtnl_setlink
, NULL
, 0);
4692 rtnl_register(PF_UNSPEC
, RTM_NEWLINK
, rtnl_newlink
, NULL
, 0);
4693 rtnl_register(PF_UNSPEC
, RTM_DELLINK
, rtnl_dellink
, NULL
, 0);
4695 rtnl_register(PF_UNSPEC
, RTM_GETADDR
, NULL
, rtnl_dump_all
, 0);
4696 rtnl_register(PF_UNSPEC
, RTM_GETROUTE
, NULL
, rtnl_dump_all
, 0);
4697 rtnl_register(PF_UNSPEC
, RTM_GETNETCONF
, NULL
, rtnl_dump_all
, 0);
4699 rtnl_register(PF_BRIDGE
, RTM_NEWNEIGH
, rtnl_fdb_add
, NULL
, 0);
4700 rtnl_register(PF_BRIDGE
, RTM_DELNEIGH
, rtnl_fdb_del
, NULL
, 0);
4701 rtnl_register(PF_BRIDGE
, RTM_GETNEIGH
, NULL
, rtnl_fdb_dump
, 0);
4703 rtnl_register(PF_BRIDGE
, RTM_GETLINK
, NULL
, rtnl_bridge_getlink
, 0);
4704 rtnl_register(PF_BRIDGE
, RTM_DELLINK
, rtnl_bridge_dellink
, NULL
, 0);
4705 rtnl_register(PF_BRIDGE
, RTM_SETLINK
, rtnl_bridge_setlink
, NULL
, 0);
4707 rtnl_register(PF_UNSPEC
, RTM_GETSTATS
, rtnl_stats_get
, rtnl_stats_dump
,