2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Routing netlink socket interface: protocol independent part.
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
19 #include <linux/errno.h>
20 #include <linux/module.h>
21 #include <linux/types.h>
22 #include <linux/socket.h>
23 #include <linux/kernel.h>
24 #include <linux/timer.h>
25 #include <linux/string.h>
26 #include <linux/sockios.h>
27 #include <linux/net.h>
28 #include <linux/fcntl.h>
30 #include <linux/slab.h>
31 #include <linux/interrupt.h>
32 #include <linux/capability.h>
33 #include <linux/skbuff.h>
34 #include <linux/init.h>
35 #include <linux/security.h>
36 #include <linux/mutex.h>
37 #include <linux/if_addr.h>
38 #include <linux/if_bridge.h>
39 #include <linux/if_vlan.h>
40 #include <linux/pci.h>
41 #include <linux/etherdevice.h>
43 #include <asm/uaccess.h>
45 #include <linux/inet.h>
46 #include <linux/netdevice.h>
47 #include <net/switchdev.h>
49 #include <net/protocol.h>
51 #include <net/route.h>
55 #include <net/pkt_sched.h>
56 #include <net/fib_rules.h>
57 #include <net/rtnetlink.h>
58 #include <net/net_namespace.h>
62 rtnl_dumpit_func dumpit
;
63 rtnl_calcit_func calcit
;
66 static DEFINE_MUTEX(rtnl_mutex
);
70 mutex_lock(&rtnl_mutex
);
72 EXPORT_SYMBOL(rtnl_lock
);
74 void __rtnl_unlock(void)
76 mutex_unlock(&rtnl_mutex
);
79 void rtnl_unlock(void)
81 /* This fellow will unlock it for us. */
84 EXPORT_SYMBOL(rtnl_unlock
);
86 int rtnl_trylock(void)
88 return mutex_trylock(&rtnl_mutex
);
90 EXPORT_SYMBOL(rtnl_trylock
);
92 int rtnl_is_locked(void)
94 return mutex_is_locked(&rtnl_mutex
);
96 EXPORT_SYMBOL(rtnl_is_locked
);
98 #ifdef CONFIG_PROVE_LOCKING
99 int lockdep_rtnl_is_held(void)
101 return lockdep_is_held(&rtnl_mutex
);
103 EXPORT_SYMBOL(lockdep_rtnl_is_held
);
104 #endif /* #ifdef CONFIG_PROVE_LOCKING */
106 static struct rtnl_link
*rtnl_msg_handlers
[RTNL_FAMILY_MAX
+ 1];
108 static inline int rtm_msgindex(int msgtype
)
110 int msgindex
= msgtype
- RTM_BASE
;
113 * msgindex < 0 implies someone tried to register a netlink
114 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
115 * the message type has not been added to linux/rtnetlink.h
117 BUG_ON(msgindex
< 0 || msgindex
>= RTM_NR_MSGTYPES
);
122 static rtnl_doit_func
rtnl_get_doit(int protocol
, int msgindex
)
124 struct rtnl_link
*tab
;
126 if (protocol
<= RTNL_FAMILY_MAX
)
127 tab
= rtnl_msg_handlers
[protocol
];
131 if (tab
== NULL
|| tab
[msgindex
].doit
== NULL
)
132 tab
= rtnl_msg_handlers
[PF_UNSPEC
];
134 return tab
[msgindex
].doit
;
137 static rtnl_dumpit_func
rtnl_get_dumpit(int protocol
, int msgindex
)
139 struct rtnl_link
*tab
;
141 if (protocol
<= RTNL_FAMILY_MAX
)
142 tab
= rtnl_msg_handlers
[protocol
];
146 if (tab
== NULL
|| tab
[msgindex
].dumpit
== NULL
)
147 tab
= rtnl_msg_handlers
[PF_UNSPEC
];
149 return tab
[msgindex
].dumpit
;
152 static rtnl_calcit_func
rtnl_get_calcit(int protocol
, int msgindex
)
154 struct rtnl_link
*tab
;
156 if (protocol
<= RTNL_FAMILY_MAX
)
157 tab
= rtnl_msg_handlers
[protocol
];
161 if (tab
== NULL
|| tab
[msgindex
].calcit
== NULL
)
162 tab
= rtnl_msg_handlers
[PF_UNSPEC
];
164 return tab
[msgindex
].calcit
;
168 * __rtnl_register - Register a rtnetlink message type
169 * @protocol: Protocol family or PF_UNSPEC
170 * @msgtype: rtnetlink message type
171 * @doit: Function pointer called for each request message
172 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
173 * @calcit: Function pointer to calc size of dump message
175 * Registers the specified function pointers (at least one of them has
176 * to be non-NULL) to be called whenever a request message for the
177 * specified protocol family and message type is received.
179 * The special protocol family PF_UNSPEC may be used to define fallback
180 * function pointers for the case when no entry for the specific protocol
183 * Returns 0 on success or a negative error code.
185 int __rtnl_register(int protocol
, int msgtype
,
186 rtnl_doit_func doit
, rtnl_dumpit_func dumpit
,
187 rtnl_calcit_func calcit
)
189 struct rtnl_link
*tab
;
192 BUG_ON(protocol
< 0 || protocol
> RTNL_FAMILY_MAX
);
193 msgindex
= rtm_msgindex(msgtype
);
195 tab
= rtnl_msg_handlers
[protocol
];
197 tab
= kcalloc(RTM_NR_MSGTYPES
, sizeof(*tab
), GFP_KERNEL
);
201 rtnl_msg_handlers
[protocol
] = tab
;
205 tab
[msgindex
].doit
= doit
;
208 tab
[msgindex
].dumpit
= dumpit
;
211 tab
[msgindex
].calcit
= calcit
;
215 EXPORT_SYMBOL_GPL(__rtnl_register
);
218 * rtnl_register - Register a rtnetlink message type
220 * Identical to __rtnl_register() but panics on failure. This is useful
221 * as failure of this function is very unlikely, it can only happen due
222 * to lack of memory when allocating the chain to store all message
223 * handlers for a protocol. Meant for use in init functions where lack
224 * of memory implies no sense in continuing.
226 void rtnl_register(int protocol
, int msgtype
,
227 rtnl_doit_func doit
, rtnl_dumpit_func dumpit
,
228 rtnl_calcit_func calcit
)
230 if (__rtnl_register(protocol
, msgtype
, doit
, dumpit
, calcit
) < 0)
231 panic("Unable to register rtnetlink message handler, "
232 "protocol = %d, message type = %d\n",
235 EXPORT_SYMBOL_GPL(rtnl_register
);
238 * rtnl_unregister - Unregister a rtnetlink message type
239 * @protocol: Protocol family or PF_UNSPEC
240 * @msgtype: rtnetlink message type
242 * Returns 0 on success or a negative error code.
244 int rtnl_unregister(int protocol
, int msgtype
)
248 BUG_ON(protocol
< 0 || protocol
> RTNL_FAMILY_MAX
);
249 msgindex
= rtm_msgindex(msgtype
);
251 if (rtnl_msg_handlers
[protocol
] == NULL
)
254 rtnl_msg_handlers
[protocol
][msgindex
].doit
= NULL
;
255 rtnl_msg_handlers
[protocol
][msgindex
].dumpit
= NULL
;
259 EXPORT_SYMBOL_GPL(rtnl_unregister
);
262 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
263 * @protocol : Protocol family or PF_UNSPEC
265 * Identical to calling rtnl_unregster() for all registered message types
266 * of a certain protocol family.
268 void rtnl_unregister_all(int protocol
)
270 BUG_ON(protocol
< 0 || protocol
> RTNL_FAMILY_MAX
);
272 kfree(rtnl_msg_handlers
[protocol
]);
273 rtnl_msg_handlers
[protocol
] = NULL
;
275 EXPORT_SYMBOL_GPL(rtnl_unregister_all
);
277 static LIST_HEAD(link_ops
);
279 static const struct rtnl_link_ops
*rtnl_link_ops_get(const char *kind
)
281 const struct rtnl_link_ops
*ops
;
283 list_for_each_entry(ops
, &link_ops
, list
) {
284 if (!strcmp(ops
->kind
, kind
))
291 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
292 * @ops: struct rtnl_link_ops * to register
294 * The caller must hold the rtnl_mutex. This function should be used
295 * by drivers that create devices during module initialization. It
296 * must be called before registering the devices.
298 * Returns 0 on success or a negative error code.
300 int __rtnl_link_register(struct rtnl_link_ops
*ops
)
302 if (rtnl_link_ops_get(ops
->kind
))
305 /* The check for setup is here because if ops
306 * does not have that filled up, it is not possible
307 * to use the ops for creating device. So do not
308 * fill up dellink as well. That disables rtnl_dellink.
310 if (ops
->setup
&& !ops
->dellink
)
311 ops
->dellink
= unregister_netdevice_queue
;
313 list_add_tail(&ops
->list
, &link_ops
);
316 EXPORT_SYMBOL_GPL(__rtnl_link_register
);
319 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
320 * @ops: struct rtnl_link_ops * to register
322 * Returns 0 on success or a negative error code.
324 int rtnl_link_register(struct rtnl_link_ops
*ops
)
329 err
= __rtnl_link_register(ops
);
333 EXPORT_SYMBOL_GPL(rtnl_link_register
);
335 static void __rtnl_kill_links(struct net
*net
, struct rtnl_link_ops
*ops
)
337 struct net_device
*dev
;
338 LIST_HEAD(list_kill
);
340 for_each_netdev(net
, dev
) {
341 if (dev
->rtnl_link_ops
== ops
)
342 ops
->dellink(dev
, &list_kill
);
344 unregister_netdevice_many(&list_kill
);
348 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
349 * @ops: struct rtnl_link_ops * to unregister
351 * The caller must hold the rtnl_mutex.
353 void __rtnl_link_unregister(struct rtnl_link_ops
*ops
)
358 __rtnl_kill_links(net
, ops
);
360 list_del(&ops
->list
);
362 EXPORT_SYMBOL_GPL(__rtnl_link_unregister
);
364 /* Return with the rtnl_lock held when there are no network
365 * devices unregistering in any network namespace.
367 static void rtnl_lock_unregistering_all(void)
371 DEFINE_WAIT_FUNC(wait
, woken_wake_function
);
373 add_wait_queue(&netdev_unregistering_wq
, &wait
);
375 unregistering
= false;
378 if (net
->dev_unreg_count
> 0) {
379 unregistering
= true;
387 wait_woken(&wait
, TASK_UNINTERRUPTIBLE
, MAX_SCHEDULE_TIMEOUT
);
389 remove_wait_queue(&netdev_unregistering_wq
, &wait
);
393 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
394 * @ops: struct rtnl_link_ops * to unregister
396 void rtnl_link_unregister(struct rtnl_link_ops
*ops
)
398 /* Close the race with cleanup_net() */
399 mutex_lock(&net_mutex
);
400 rtnl_lock_unregistering_all();
401 __rtnl_link_unregister(ops
);
403 mutex_unlock(&net_mutex
);
405 EXPORT_SYMBOL_GPL(rtnl_link_unregister
);
407 static size_t rtnl_link_get_slave_info_data_size(const struct net_device
*dev
)
409 struct net_device
*master_dev
;
410 const struct rtnl_link_ops
*ops
;
412 master_dev
= netdev_master_upper_dev_get((struct net_device
*) dev
);
415 ops
= master_dev
->rtnl_link_ops
;
416 if (!ops
|| !ops
->get_slave_size
)
418 /* IFLA_INFO_SLAVE_DATA + nested data */
419 return nla_total_size(sizeof(struct nlattr
)) +
420 ops
->get_slave_size(master_dev
, dev
);
423 static size_t rtnl_link_get_size(const struct net_device
*dev
)
425 const struct rtnl_link_ops
*ops
= dev
->rtnl_link_ops
;
431 size
= nla_total_size(sizeof(struct nlattr
)) + /* IFLA_LINKINFO */
432 nla_total_size(strlen(ops
->kind
) + 1); /* IFLA_INFO_KIND */
435 /* IFLA_INFO_DATA + nested data */
436 size
+= nla_total_size(sizeof(struct nlattr
)) +
439 if (ops
->get_xstats_size
)
440 /* IFLA_INFO_XSTATS */
441 size
+= nla_total_size(ops
->get_xstats_size(dev
));
443 size
+= rtnl_link_get_slave_info_data_size(dev
);
448 static LIST_HEAD(rtnl_af_ops
);
450 static const struct rtnl_af_ops
*rtnl_af_lookup(const int family
)
452 const struct rtnl_af_ops
*ops
;
454 list_for_each_entry(ops
, &rtnl_af_ops
, list
) {
455 if (ops
->family
== family
)
463 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
464 * @ops: struct rtnl_af_ops * to register
466 * Returns 0 on success or a negative error code.
468 void rtnl_af_register(struct rtnl_af_ops
*ops
)
471 list_add_tail(&ops
->list
, &rtnl_af_ops
);
474 EXPORT_SYMBOL_GPL(rtnl_af_register
);
477 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
478 * @ops: struct rtnl_af_ops * to unregister
480 * The caller must hold the rtnl_mutex.
482 void __rtnl_af_unregister(struct rtnl_af_ops
*ops
)
484 list_del(&ops
->list
);
486 EXPORT_SYMBOL_GPL(__rtnl_af_unregister
);
489 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
490 * @ops: struct rtnl_af_ops * to unregister
492 void rtnl_af_unregister(struct rtnl_af_ops
*ops
)
495 __rtnl_af_unregister(ops
);
498 EXPORT_SYMBOL_GPL(rtnl_af_unregister
);
500 static size_t rtnl_link_get_af_size(const struct net_device
*dev
)
502 struct rtnl_af_ops
*af_ops
;
506 size
= nla_total_size(sizeof(struct nlattr
));
508 list_for_each_entry(af_ops
, &rtnl_af_ops
, list
) {
509 if (af_ops
->get_link_af_size
) {
510 /* AF_* + nested data */
511 size
+= nla_total_size(sizeof(struct nlattr
)) +
512 af_ops
->get_link_af_size(dev
);
519 static bool rtnl_have_link_slave_info(const struct net_device
*dev
)
521 struct net_device
*master_dev
;
523 master_dev
= netdev_master_upper_dev_get((struct net_device
*) dev
);
524 if (master_dev
&& master_dev
->rtnl_link_ops
)
529 static int rtnl_link_slave_info_fill(struct sk_buff
*skb
,
530 const struct net_device
*dev
)
532 struct net_device
*master_dev
;
533 const struct rtnl_link_ops
*ops
;
534 struct nlattr
*slave_data
;
537 master_dev
= netdev_master_upper_dev_get((struct net_device
*) dev
);
540 ops
= master_dev
->rtnl_link_ops
;
543 if (nla_put_string(skb
, IFLA_INFO_SLAVE_KIND
, ops
->kind
) < 0)
545 if (ops
->fill_slave_info
) {
546 slave_data
= nla_nest_start(skb
, IFLA_INFO_SLAVE_DATA
);
549 err
= ops
->fill_slave_info(skb
, master_dev
, dev
);
551 goto err_cancel_slave_data
;
552 nla_nest_end(skb
, slave_data
);
556 err_cancel_slave_data
:
557 nla_nest_cancel(skb
, slave_data
);
561 static int rtnl_link_info_fill(struct sk_buff
*skb
,
562 const struct net_device
*dev
)
564 const struct rtnl_link_ops
*ops
= dev
->rtnl_link_ops
;
570 if (nla_put_string(skb
, IFLA_INFO_KIND
, ops
->kind
) < 0)
572 if (ops
->fill_xstats
) {
573 err
= ops
->fill_xstats(skb
, dev
);
577 if (ops
->fill_info
) {
578 data
= nla_nest_start(skb
, IFLA_INFO_DATA
);
581 err
= ops
->fill_info(skb
, dev
);
583 goto err_cancel_data
;
584 nla_nest_end(skb
, data
);
589 nla_nest_cancel(skb
, data
);
593 static int rtnl_link_fill(struct sk_buff
*skb
, const struct net_device
*dev
)
595 struct nlattr
*linkinfo
;
598 linkinfo
= nla_nest_start(skb
, IFLA_LINKINFO
);
599 if (linkinfo
== NULL
)
602 err
= rtnl_link_info_fill(skb
, dev
);
604 goto err_cancel_link
;
606 err
= rtnl_link_slave_info_fill(skb
, dev
);
608 goto err_cancel_link
;
610 nla_nest_end(skb
, linkinfo
);
614 nla_nest_cancel(skb
, linkinfo
);
619 int rtnetlink_send(struct sk_buff
*skb
, struct net
*net
, u32 pid
, unsigned int group
, int echo
)
621 struct sock
*rtnl
= net
->rtnl
;
624 NETLINK_CB(skb
).dst_group
= group
;
626 atomic_inc(&skb
->users
);
627 netlink_broadcast(rtnl
, skb
, pid
, group
, GFP_KERNEL
);
629 err
= netlink_unicast(rtnl
, skb
, pid
, MSG_DONTWAIT
);
633 int rtnl_unicast(struct sk_buff
*skb
, struct net
*net
, u32 pid
)
635 struct sock
*rtnl
= net
->rtnl
;
637 return nlmsg_unicast(rtnl
, skb
, pid
);
639 EXPORT_SYMBOL(rtnl_unicast
);
641 void rtnl_notify(struct sk_buff
*skb
, struct net
*net
, u32 pid
, u32 group
,
642 struct nlmsghdr
*nlh
, gfp_t flags
)
644 struct sock
*rtnl
= net
->rtnl
;
648 report
= nlmsg_report(nlh
);
650 nlmsg_notify(rtnl
, skb
, pid
, group
, report
, flags
);
652 EXPORT_SYMBOL(rtnl_notify
);
654 void rtnl_set_sk_err(struct net
*net
, u32 group
, int error
)
656 struct sock
*rtnl
= net
->rtnl
;
658 netlink_set_err(rtnl
, 0, group
, error
);
660 EXPORT_SYMBOL(rtnl_set_sk_err
);
662 int rtnetlink_put_metrics(struct sk_buff
*skb
, u32
*metrics
)
667 mx
= nla_nest_start(skb
, RTA_METRICS
);
671 for (i
= 0; i
< RTAX_MAX
; i
++) {
673 if (i
== RTAX_CC_ALGO
- 1) {
674 char tmp
[TCP_CA_NAME_MAX
], *name
;
676 name
= tcp_ca_get_name_by_key(metrics
[i
], tmp
);
679 if (nla_put_string(skb
, i
+ 1, name
))
680 goto nla_put_failure
;
682 if (nla_put_u32(skb
, i
+ 1, metrics
[i
]))
683 goto nla_put_failure
;
690 nla_nest_cancel(skb
, mx
);
694 return nla_nest_end(skb
, mx
);
697 nla_nest_cancel(skb
, mx
);
700 EXPORT_SYMBOL(rtnetlink_put_metrics
);
702 int rtnl_put_cacheinfo(struct sk_buff
*skb
, struct dst_entry
*dst
, u32 id
,
703 long expires
, u32 error
)
705 struct rta_cacheinfo ci
= {
706 .rta_lastuse
= jiffies_delta_to_clock_t(jiffies
- dst
->lastuse
),
707 .rta_used
= dst
->__use
,
708 .rta_clntref
= atomic_read(&(dst
->__refcnt
)),
716 clock
= jiffies_to_clock_t(abs(expires
));
717 clock
= min_t(unsigned long, clock
, INT_MAX
);
718 ci
.rta_expires
= (expires
> 0) ? clock
: -clock
;
720 return nla_put(skb
, RTA_CACHEINFO
, sizeof(ci
), &ci
);
722 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo
);
724 static void set_operstate(struct net_device
*dev
, unsigned char transition
)
726 unsigned char operstate
= dev
->operstate
;
728 switch (transition
) {
730 if ((operstate
== IF_OPER_DORMANT
||
731 operstate
== IF_OPER_UNKNOWN
) &&
733 operstate
= IF_OPER_UP
;
736 case IF_OPER_DORMANT
:
737 if (operstate
== IF_OPER_UP
||
738 operstate
== IF_OPER_UNKNOWN
)
739 operstate
= IF_OPER_DORMANT
;
743 if (dev
->operstate
!= operstate
) {
744 write_lock_bh(&dev_base_lock
);
745 dev
->operstate
= operstate
;
746 write_unlock_bh(&dev_base_lock
);
747 netdev_state_change(dev
);
751 static unsigned int rtnl_dev_get_flags(const struct net_device
*dev
)
753 return (dev
->flags
& ~(IFF_PROMISC
| IFF_ALLMULTI
)) |
754 (dev
->gflags
& (IFF_PROMISC
| IFF_ALLMULTI
));
757 static unsigned int rtnl_dev_combine_flags(const struct net_device
*dev
,
758 const struct ifinfomsg
*ifm
)
760 unsigned int flags
= ifm
->ifi_flags
;
762 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
764 flags
= (flags
& ifm
->ifi_change
) |
765 (rtnl_dev_get_flags(dev
) & ~ifm
->ifi_change
);
770 static void copy_rtnl_link_stats(struct rtnl_link_stats
*a
,
771 const struct rtnl_link_stats64
*b
)
773 a
->rx_packets
= b
->rx_packets
;
774 a
->tx_packets
= b
->tx_packets
;
775 a
->rx_bytes
= b
->rx_bytes
;
776 a
->tx_bytes
= b
->tx_bytes
;
777 a
->rx_errors
= b
->rx_errors
;
778 a
->tx_errors
= b
->tx_errors
;
779 a
->rx_dropped
= b
->rx_dropped
;
780 a
->tx_dropped
= b
->tx_dropped
;
782 a
->multicast
= b
->multicast
;
783 a
->collisions
= b
->collisions
;
785 a
->rx_length_errors
= b
->rx_length_errors
;
786 a
->rx_over_errors
= b
->rx_over_errors
;
787 a
->rx_crc_errors
= b
->rx_crc_errors
;
788 a
->rx_frame_errors
= b
->rx_frame_errors
;
789 a
->rx_fifo_errors
= b
->rx_fifo_errors
;
790 a
->rx_missed_errors
= b
->rx_missed_errors
;
792 a
->tx_aborted_errors
= b
->tx_aborted_errors
;
793 a
->tx_carrier_errors
= b
->tx_carrier_errors
;
794 a
->tx_fifo_errors
= b
->tx_fifo_errors
;
795 a
->tx_heartbeat_errors
= b
->tx_heartbeat_errors
;
796 a
->tx_window_errors
= b
->tx_window_errors
;
798 a
->rx_compressed
= b
->rx_compressed
;
799 a
->tx_compressed
= b
->tx_compressed
;
802 static void copy_rtnl_link_stats64(void *v
, const struct rtnl_link_stats64
*b
)
804 memcpy(v
, b
, sizeof(*b
));
808 static inline int rtnl_vfinfo_size(const struct net_device
*dev
,
811 if (dev
->dev
.parent
&& dev_is_pci(dev
->dev
.parent
) &&
812 (ext_filter_mask
& RTEXT_FILTER_VF
)) {
813 int num_vfs
= dev_num_vf(dev
->dev
.parent
);
814 size_t size
= nla_total_size(sizeof(struct nlattr
));
815 size
+= nla_total_size(num_vfs
* sizeof(struct nlattr
));
817 (nla_total_size(sizeof(struct ifla_vf_mac
)) +
818 nla_total_size(sizeof(struct ifla_vf_vlan
)) +
819 nla_total_size(sizeof(struct ifla_vf_spoofchk
)) +
820 nla_total_size(sizeof(struct ifla_vf_rate
)) +
821 nla_total_size(sizeof(struct ifla_vf_link_state
)));
827 static size_t rtnl_port_size(const struct net_device
*dev
,
830 size_t port_size
= nla_total_size(4) /* PORT_VF */
831 + nla_total_size(PORT_PROFILE_MAX
) /* PORT_PROFILE */
832 + nla_total_size(sizeof(struct ifla_port_vsi
))
834 + nla_total_size(PORT_UUID_MAX
) /* PORT_INSTANCE_UUID */
835 + nla_total_size(PORT_UUID_MAX
) /* PORT_HOST_UUID */
836 + nla_total_size(1) /* PROT_VDP_REQUEST */
837 + nla_total_size(2); /* PORT_VDP_RESPONSE */
838 size_t vf_ports_size
= nla_total_size(sizeof(struct nlattr
));
839 size_t vf_port_size
= nla_total_size(sizeof(struct nlattr
))
841 size_t port_self_size
= nla_total_size(sizeof(struct nlattr
))
844 if (!dev
->netdev_ops
->ndo_get_vf_port
|| !dev
->dev
.parent
||
845 !(ext_filter_mask
& RTEXT_FILTER_VF
))
847 if (dev_num_vf(dev
->dev
.parent
))
848 return port_self_size
+ vf_ports_size
+
849 vf_port_size
* dev_num_vf(dev
->dev
.parent
);
851 return port_self_size
;
854 static noinline
size_t if_nlmsg_size(const struct net_device
*dev
,
857 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
858 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
859 + nla_total_size(IFALIASZ
) /* IFLA_IFALIAS */
860 + nla_total_size(IFNAMSIZ
) /* IFLA_QDISC */
861 + nla_total_size(sizeof(struct rtnl_link_ifmap
))
862 + nla_total_size(sizeof(struct rtnl_link_stats
))
863 + nla_total_size(sizeof(struct rtnl_link_stats64
))
864 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
865 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_BROADCAST */
866 + nla_total_size(4) /* IFLA_TXQLEN */
867 + nla_total_size(4) /* IFLA_WEIGHT */
868 + nla_total_size(4) /* IFLA_MTU */
869 + nla_total_size(4) /* IFLA_LINK */
870 + nla_total_size(4) /* IFLA_MASTER */
871 + nla_total_size(1) /* IFLA_CARRIER */
872 + nla_total_size(4) /* IFLA_PROMISCUITY */
873 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
874 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
875 + nla_total_size(1) /* IFLA_OPERSTATE */
876 + nla_total_size(1) /* IFLA_LINKMODE */
877 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
878 + nla_total_size(4) /* IFLA_LINK_NETNSID */
879 + nla_total_size(ext_filter_mask
880 & RTEXT_FILTER_VF
? 4 : 0) /* IFLA_NUM_VF */
881 + rtnl_vfinfo_size(dev
, ext_filter_mask
) /* IFLA_VFINFO_LIST */
882 + rtnl_port_size(dev
, ext_filter_mask
) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
883 + rtnl_link_get_size(dev
) /* IFLA_LINKINFO */
884 + rtnl_link_get_af_size(dev
) /* IFLA_AF_SPEC */
885 + nla_total_size(MAX_PHYS_ITEM_ID_LEN
) /* IFLA_PHYS_PORT_ID */
886 + nla_total_size(MAX_PHYS_ITEM_ID_LEN
); /* IFLA_PHYS_SWITCH_ID */
889 static int rtnl_vf_ports_fill(struct sk_buff
*skb
, struct net_device
*dev
)
891 struct nlattr
*vf_ports
;
892 struct nlattr
*vf_port
;
896 vf_ports
= nla_nest_start(skb
, IFLA_VF_PORTS
);
900 for (vf
= 0; vf
< dev_num_vf(dev
->dev
.parent
); vf
++) {
901 vf_port
= nla_nest_start(skb
, IFLA_VF_PORT
);
903 goto nla_put_failure
;
904 if (nla_put_u32(skb
, IFLA_PORT_VF
, vf
))
905 goto nla_put_failure
;
906 err
= dev
->netdev_ops
->ndo_get_vf_port(dev
, vf
, skb
);
907 if (err
== -EMSGSIZE
)
908 goto nla_put_failure
;
910 nla_nest_cancel(skb
, vf_port
);
913 nla_nest_end(skb
, vf_port
);
916 nla_nest_end(skb
, vf_ports
);
921 nla_nest_cancel(skb
, vf_ports
);
925 static int rtnl_port_self_fill(struct sk_buff
*skb
, struct net_device
*dev
)
927 struct nlattr
*port_self
;
930 port_self
= nla_nest_start(skb
, IFLA_PORT_SELF
);
934 err
= dev
->netdev_ops
->ndo_get_vf_port(dev
, PORT_SELF_VF
, skb
);
936 nla_nest_cancel(skb
, port_self
);
937 return (err
== -EMSGSIZE
) ? err
: 0;
940 nla_nest_end(skb
, port_self
);
945 static int rtnl_port_fill(struct sk_buff
*skb
, struct net_device
*dev
,
950 if (!dev
->netdev_ops
->ndo_get_vf_port
|| !dev
->dev
.parent
||
951 !(ext_filter_mask
& RTEXT_FILTER_VF
))
954 err
= rtnl_port_self_fill(skb
, dev
);
958 if (dev_num_vf(dev
->dev
.parent
)) {
959 err
= rtnl_vf_ports_fill(skb
, dev
);
967 static int rtnl_phys_port_id_fill(struct sk_buff
*skb
, struct net_device
*dev
)
970 struct netdev_phys_item_id ppid
;
972 err
= dev_get_phys_port_id(dev
, &ppid
);
974 if (err
== -EOPNOTSUPP
)
979 if (nla_put(skb
, IFLA_PHYS_PORT_ID
, ppid
.id_len
, ppid
.id
))
985 static int rtnl_phys_port_name_fill(struct sk_buff
*skb
, struct net_device
*dev
)
990 err
= dev_get_phys_port_name(dev
, name
, sizeof(name
));
992 if (err
== -EOPNOTSUPP
)
997 if (nla_put(skb
, IFLA_PHYS_PORT_NAME
, strlen(name
), name
))
1003 static int rtnl_phys_switch_id_fill(struct sk_buff
*skb
, struct net_device
*dev
)
1006 struct netdev_phys_item_id psid
;
1008 err
= netdev_switch_parent_id_get(dev
, &psid
);
1010 if (err
== -EOPNOTSUPP
)
1015 if (nla_put(skb
, IFLA_PHYS_SWITCH_ID
, psid
.id_len
, psid
.id
))
1021 static int rtnl_fill_ifinfo(struct sk_buff
*skb
, struct net_device
*dev
,
1022 int type
, u32 pid
, u32 seq
, u32 change
,
1023 unsigned int flags
, u32 ext_filter_mask
)
1025 struct ifinfomsg
*ifm
;
1026 struct nlmsghdr
*nlh
;
1027 struct rtnl_link_stats64 temp
;
1028 const struct rtnl_link_stats64
*stats
;
1029 struct nlattr
*attr
, *af_spec
;
1030 struct rtnl_af_ops
*af_ops
;
1031 struct net_device
*upper_dev
= netdev_master_upper_dev_get(dev
);
1034 nlh
= nlmsg_put(skb
, pid
, seq
, type
, sizeof(*ifm
), flags
);
1038 ifm
= nlmsg_data(nlh
);
1039 ifm
->ifi_family
= AF_UNSPEC
;
1041 ifm
->ifi_type
= dev
->type
;
1042 ifm
->ifi_index
= dev
->ifindex
;
1043 ifm
->ifi_flags
= dev_get_flags(dev
);
1044 ifm
->ifi_change
= change
;
1046 if (nla_put_string(skb
, IFLA_IFNAME
, dev
->name
) ||
1047 nla_put_u32(skb
, IFLA_TXQLEN
, dev
->tx_queue_len
) ||
1048 nla_put_u8(skb
, IFLA_OPERSTATE
,
1049 netif_running(dev
) ? dev
->operstate
: IF_OPER_DOWN
) ||
1050 nla_put_u8(skb
, IFLA_LINKMODE
, dev
->link_mode
) ||
1051 nla_put_u32(skb
, IFLA_MTU
, dev
->mtu
) ||
1052 nla_put_u32(skb
, IFLA_GROUP
, dev
->group
) ||
1053 nla_put_u32(skb
, IFLA_PROMISCUITY
, dev
->promiscuity
) ||
1054 nla_put_u32(skb
, IFLA_NUM_TX_QUEUES
, dev
->num_tx_queues
) ||
1056 nla_put_u32(skb
, IFLA_NUM_RX_QUEUES
, dev
->num_rx_queues
) ||
1058 (dev
->ifindex
!= dev_get_iflink(dev
) &&
1059 nla_put_u32(skb
, IFLA_LINK
, dev_get_iflink(dev
))) ||
1061 nla_put_u32(skb
, IFLA_MASTER
, upper_dev
->ifindex
)) ||
1062 nla_put_u8(skb
, IFLA_CARRIER
, netif_carrier_ok(dev
)) ||
1064 nla_put_string(skb
, IFLA_QDISC
, dev
->qdisc
->ops
->id
)) ||
1066 nla_put_string(skb
, IFLA_IFALIAS
, dev
->ifalias
)) ||
1067 nla_put_u32(skb
, IFLA_CARRIER_CHANGES
,
1068 atomic_read(&dev
->carrier_changes
)))
1069 goto nla_put_failure
;
1072 struct rtnl_link_ifmap map
= {
1073 .mem_start
= dev
->mem_start
,
1074 .mem_end
= dev
->mem_end
,
1075 .base_addr
= dev
->base_addr
,
1078 .port
= dev
->if_port
,
1080 if (nla_put(skb
, IFLA_MAP
, sizeof(map
), &map
))
1081 goto nla_put_failure
;
1084 if (dev
->addr_len
) {
1085 if (nla_put(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
) ||
1086 nla_put(skb
, IFLA_BROADCAST
, dev
->addr_len
, dev
->broadcast
))
1087 goto nla_put_failure
;
1090 if (rtnl_phys_port_id_fill(skb
, dev
))
1091 goto nla_put_failure
;
1093 if (rtnl_phys_port_name_fill(skb
, dev
))
1094 goto nla_put_failure
;
1096 if (rtnl_phys_switch_id_fill(skb
, dev
))
1097 goto nla_put_failure
;
1099 attr
= nla_reserve(skb
, IFLA_STATS
,
1100 sizeof(struct rtnl_link_stats
));
1102 goto nla_put_failure
;
1104 stats
= dev_get_stats(dev
, &temp
);
1105 copy_rtnl_link_stats(nla_data(attr
), stats
);
1107 attr
= nla_reserve(skb
, IFLA_STATS64
,
1108 sizeof(struct rtnl_link_stats64
));
1110 goto nla_put_failure
;
1111 copy_rtnl_link_stats64(nla_data(attr
), stats
);
1113 if (dev
->dev
.parent
&& (ext_filter_mask
& RTEXT_FILTER_VF
) &&
1114 nla_put_u32(skb
, IFLA_NUM_VF
, dev_num_vf(dev
->dev
.parent
)))
1115 goto nla_put_failure
;
1117 if (dev
->netdev_ops
->ndo_get_vf_config
&& dev
->dev
.parent
1118 && (ext_filter_mask
& RTEXT_FILTER_VF
)) {
1121 struct nlattr
*vfinfo
, *vf
;
1122 int num_vfs
= dev_num_vf(dev
->dev
.parent
);
1124 vfinfo
= nla_nest_start(skb
, IFLA_VFINFO_LIST
);
1126 goto nla_put_failure
;
1127 for (i
= 0; i
< num_vfs
; i
++) {
1128 struct ifla_vf_info ivi
;
1129 struct ifla_vf_mac vf_mac
;
1130 struct ifla_vf_vlan vf_vlan
;
1131 struct ifla_vf_rate vf_rate
;
1132 struct ifla_vf_tx_rate vf_tx_rate
;
1133 struct ifla_vf_spoofchk vf_spoofchk
;
1134 struct ifla_vf_link_state vf_linkstate
;
1137 * Not all SR-IOV capable drivers support the
1138 * spoofcheck query. Preset to -1 so the user
1139 * space tool can detect that the driver didn't
1143 memset(ivi
.mac
, 0, sizeof(ivi
.mac
));
1144 /* The default value for VF link state is "auto"
1145 * IFLA_VF_LINK_STATE_AUTO which equals zero
1148 if (dev
->netdev_ops
->ndo_get_vf_config(dev
, i
, &ivi
))
1155 vf_linkstate
.vf
= ivi
.vf
;
1157 memcpy(vf_mac
.mac
, ivi
.mac
, sizeof(ivi
.mac
));
1158 vf_vlan
.vlan
= ivi
.vlan
;
1159 vf_vlan
.qos
= ivi
.qos
;
1160 vf_tx_rate
.rate
= ivi
.max_tx_rate
;
1161 vf_rate
.min_tx_rate
= ivi
.min_tx_rate
;
1162 vf_rate
.max_tx_rate
= ivi
.max_tx_rate
;
1163 vf_spoofchk
.setting
= ivi
.spoofchk
;
1164 vf_linkstate
.link_state
= ivi
.linkstate
;
1165 vf
= nla_nest_start(skb
, IFLA_VF_INFO
);
1167 nla_nest_cancel(skb
, vfinfo
);
1168 goto nla_put_failure
;
1170 if (nla_put(skb
, IFLA_VF_MAC
, sizeof(vf_mac
), &vf_mac
) ||
1171 nla_put(skb
, IFLA_VF_VLAN
, sizeof(vf_vlan
), &vf_vlan
) ||
1172 nla_put(skb
, IFLA_VF_RATE
, sizeof(vf_rate
),
1174 nla_put(skb
, IFLA_VF_TX_RATE
, sizeof(vf_tx_rate
),
1176 nla_put(skb
, IFLA_VF_SPOOFCHK
, sizeof(vf_spoofchk
),
1178 nla_put(skb
, IFLA_VF_LINK_STATE
, sizeof(vf_linkstate
),
1180 goto nla_put_failure
;
1181 nla_nest_end(skb
, vf
);
1183 nla_nest_end(skb
, vfinfo
);
1186 if (rtnl_port_fill(skb
, dev
, ext_filter_mask
))
1187 goto nla_put_failure
;
1189 if (dev
->rtnl_link_ops
|| rtnl_have_link_slave_info(dev
)) {
1190 if (rtnl_link_fill(skb
, dev
) < 0)
1191 goto nla_put_failure
;
1194 if (dev
->rtnl_link_ops
&&
1195 dev
->rtnl_link_ops
->get_link_net
) {
1196 struct net
*link_net
= dev
->rtnl_link_ops
->get_link_net(dev
);
1198 if (!net_eq(dev_net(dev
), link_net
)) {
1199 int id
= peernet2id(dev_net(dev
), link_net
);
1201 if (nla_put_s32(skb
, IFLA_LINK_NETNSID
, id
))
1202 goto nla_put_failure
;
1206 if (!(af_spec
= nla_nest_start(skb
, IFLA_AF_SPEC
)))
1207 goto nla_put_failure
;
1209 list_for_each_entry(af_ops
, &rtnl_af_ops
, list
) {
1210 if (af_ops
->fill_link_af
) {
1214 if (!(af
= nla_nest_start(skb
, af_ops
->family
)))
1215 goto nla_put_failure
;
1217 err
= af_ops
->fill_link_af(skb
, dev
);
1220 * Caller may return ENODATA to indicate that there
1221 * was no data to be dumped. This is not an error, it
1222 * means we should trim the attribute header and
1225 if (err
== -ENODATA
)
1226 nla_nest_cancel(skb
, af
);
1228 goto nla_put_failure
;
1230 nla_nest_end(skb
, af
);
1234 nla_nest_end(skb
, af_spec
);
1236 nlmsg_end(skb
, nlh
);
1240 nlmsg_cancel(skb
, nlh
);
1244 static const struct nla_policy ifla_policy
[IFLA_MAX
+1] = {
1245 [IFLA_IFNAME
] = { .type
= NLA_STRING
, .len
= IFNAMSIZ
-1 },
1246 [IFLA_ADDRESS
] = { .type
= NLA_BINARY
, .len
= MAX_ADDR_LEN
},
1247 [IFLA_BROADCAST
] = { .type
= NLA_BINARY
, .len
= MAX_ADDR_LEN
},
1248 [IFLA_MAP
] = { .len
= sizeof(struct rtnl_link_ifmap
) },
1249 [IFLA_MTU
] = { .type
= NLA_U32
},
1250 [IFLA_LINK
] = { .type
= NLA_U32
},
1251 [IFLA_MASTER
] = { .type
= NLA_U32
},
1252 [IFLA_CARRIER
] = { .type
= NLA_U8
},
1253 [IFLA_TXQLEN
] = { .type
= NLA_U32
},
1254 [IFLA_WEIGHT
] = { .type
= NLA_U32
},
1255 [IFLA_OPERSTATE
] = { .type
= NLA_U8
},
1256 [IFLA_LINKMODE
] = { .type
= NLA_U8
},
1257 [IFLA_LINKINFO
] = { .type
= NLA_NESTED
},
1258 [IFLA_NET_NS_PID
] = { .type
= NLA_U32
},
1259 [IFLA_NET_NS_FD
] = { .type
= NLA_U32
},
1260 [IFLA_IFALIAS
] = { .type
= NLA_STRING
, .len
= IFALIASZ
-1 },
1261 [IFLA_VFINFO_LIST
] = {. type
= NLA_NESTED
},
1262 [IFLA_VF_PORTS
] = { .type
= NLA_NESTED
},
1263 [IFLA_PORT_SELF
] = { .type
= NLA_NESTED
},
1264 [IFLA_AF_SPEC
] = { .type
= NLA_NESTED
},
1265 [IFLA_EXT_MASK
] = { .type
= NLA_U32
},
1266 [IFLA_PROMISCUITY
] = { .type
= NLA_U32
},
1267 [IFLA_NUM_TX_QUEUES
] = { .type
= NLA_U32
},
1268 [IFLA_NUM_RX_QUEUES
] = { .type
= NLA_U32
},
1269 [IFLA_PHYS_PORT_ID
] = { .type
= NLA_BINARY
, .len
= MAX_PHYS_ITEM_ID_LEN
},
1270 [IFLA_CARRIER_CHANGES
] = { .type
= NLA_U32
}, /* ignored */
1271 [IFLA_PHYS_SWITCH_ID
] = { .type
= NLA_BINARY
, .len
= MAX_PHYS_ITEM_ID_LEN
},
1272 [IFLA_LINK_NETNSID
] = { .type
= NLA_S32
},
1275 static const struct nla_policy ifla_info_policy
[IFLA_INFO_MAX
+1] = {
1276 [IFLA_INFO_KIND
] = { .type
= NLA_STRING
},
1277 [IFLA_INFO_DATA
] = { .type
= NLA_NESTED
},
1278 [IFLA_INFO_SLAVE_KIND
] = { .type
= NLA_STRING
},
1279 [IFLA_INFO_SLAVE_DATA
] = { .type
= NLA_NESTED
},
1282 static const struct nla_policy ifla_vfinfo_policy
[IFLA_VF_INFO_MAX
+1] = {
1283 [IFLA_VF_INFO
] = { .type
= NLA_NESTED
},
1286 static const struct nla_policy ifla_vf_policy
[IFLA_VF_MAX
+1] = {
1287 [IFLA_VF_MAC
] = { .len
= sizeof(struct ifla_vf_mac
) },
1288 [IFLA_VF_VLAN
] = { .len
= sizeof(struct ifla_vf_vlan
) },
1289 [IFLA_VF_TX_RATE
] = { .len
= sizeof(struct ifla_vf_tx_rate
) },
1290 [IFLA_VF_SPOOFCHK
] = { .len
= sizeof(struct ifla_vf_spoofchk
) },
1291 [IFLA_VF_RATE
] = { .len
= sizeof(struct ifla_vf_rate
) },
1292 [IFLA_VF_LINK_STATE
] = { .len
= sizeof(struct ifla_vf_link_state
) },
1295 static const struct nla_policy ifla_port_policy
[IFLA_PORT_MAX
+1] = {
1296 [IFLA_PORT_VF
] = { .type
= NLA_U32
},
1297 [IFLA_PORT_PROFILE
] = { .type
= NLA_STRING
,
1298 .len
= PORT_PROFILE_MAX
},
1299 [IFLA_PORT_VSI_TYPE
] = { .type
= NLA_BINARY
,
1300 .len
= sizeof(struct ifla_port_vsi
)},
1301 [IFLA_PORT_INSTANCE_UUID
] = { .type
= NLA_BINARY
,
1302 .len
= PORT_UUID_MAX
},
1303 [IFLA_PORT_HOST_UUID
] = { .type
= NLA_STRING
,
1304 .len
= PORT_UUID_MAX
},
1305 [IFLA_PORT_REQUEST
] = { .type
= NLA_U8
, },
1306 [IFLA_PORT_RESPONSE
] = { .type
= NLA_U16
, },
1309 static int rtnl_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1311 struct net
*net
= sock_net(skb
->sk
);
1314 struct net_device
*dev
;
1315 struct hlist_head
*head
;
1316 struct nlattr
*tb
[IFLA_MAX
+1];
1317 u32 ext_filter_mask
= 0;
1322 s_idx
= cb
->args
[1];
1324 cb
->seq
= net
->dev_base_seq
;
1326 /* A hack to preserve kernel<->userspace interface.
1327 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1328 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1329 * what iproute2 < v3.9.0 used.
1330 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1331 * attribute, its netlink message is shorter than struct ifinfomsg.
1333 hdrlen
= nlmsg_len(cb
->nlh
) < sizeof(struct ifinfomsg
) ?
1334 sizeof(struct rtgenmsg
) : sizeof(struct ifinfomsg
);
1336 if (nlmsg_parse(cb
->nlh
, hdrlen
, tb
, IFLA_MAX
, ifla_policy
) >= 0) {
1338 if (tb
[IFLA_EXT_MASK
])
1339 ext_filter_mask
= nla_get_u32(tb
[IFLA_EXT_MASK
]);
1342 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
1344 head
= &net
->dev_index_head
[h
];
1345 hlist_for_each_entry(dev
, head
, index_hlist
) {
1348 err
= rtnl_fill_ifinfo(skb
, dev
, RTM_NEWLINK
,
1349 NETLINK_CB(cb
->skb
).portid
,
1350 cb
->nlh
->nlmsg_seq
, 0,
1353 /* If we ran out of room on the first message,
1356 WARN_ON((err
== -EMSGSIZE
) && (skb
->len
== 0));
1361 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
1373 int rtnl_nla_parse_ifla(struct nlattr
**tb
, const struct nlattr
*head
, int len
)
1375 return nla_parse(tb
, IFLA_MAX
, head
, len
, ifla_policy
);
1377 EXPORT_SYMBOL(rtnl_nla_parse_ifla
);
1379 struct net
*rtnl_link_get_net(struct net
*src_net
, struct nlattr
*tb
[])
1382 /* Examine the link attributes and figure out which
1383 * network namespace we are talking about.
1385 if (tb
[IFLA_NET_NS_PID
])
1386 net
= get_net_ns_by_pid(nla_get_u32(tb
[IFLA_NET_NS_PID
]));
1387 else if (tb
[IFLA_NET_NS_FD
])
1388 net
= get_net_ns_by_fd(nla_get_u32(tb
[IFLA_NET_NS_FD
]));
1390 net
= get_net(src_net
);
1393 EXPORT_SYMBOL(rtnl_link_get_net
);
1395 static int validate_linkmsg(struct net_device
*dev
, struct nlattr
*tb
[])
1398 if (tb
[IFLA_ADDRESS
] &&
1399 nla_len(tb
[IFLA_ADDRESS
]) < dev
->addr_len
)
1402 if (tb
[IFLA_BROADCAST
] &&
1403 nla_len(tb
[IFLA_BROADCAST
]) < dev
->addr_len
)
1407 if (tb
[IFLA_AF_SPEC
]) {
1411 nla_for_each_nested(af
, tb
[IFLA_AF_SPEC
], rem
) {
1412 const struct rtnl_af_ops
*af_ops
;
1414 if (!(af_ops
= rtnl_af_lookup(nla_type(af
))))
1415 return -EAFNOSUPPORT
;
1417 if (!af_ops
->set_link_af
)
1420 if (af_ops
->validate_link_af
) {
1421 err
= af_ops
->validate_link_af(dev
, af
);
1431 static int do_setvfinfo(struct net_device
*dev
, struct nlattr
*attr
)
1433 int rem
, err
= -EINVAL
;
1435 const struct net_device_ops
*ops
= dev
->netdev_ops
;
1437 nla_for_each_nested(vf
, attr
, rem
) {
1438 switch (nla_type(vf
)) {
1440 struct ifla_vf_mac
*ivm
;
1443 if (ops
->ndo_set_vf_mac
)
1444 err
= ops
->ndo_set_vf_mac(dev
, ivm
->vf
,
1448 case IFLA_VF_VLAN
: {
1449 struct ifla_vf_vlan
*ivv
;
1452 if (ops
->ndo_set_vf_vlan
)
1453 err
= ops
->ndo_set_vf_vlan(dev
, ivv
->vf
,
1458 case IFLA_VF_TX_RATE
: {
1459 struct ifla_vf_tx_rate
*ivt
;
1460 struct ifla_vf_info ivf
;
1463 if (ops
->ndo_get_vf_config
)
1464 err
= ops
->ndo_get_vf_config(dev
, ivt
->vf
,
1469 if (ops
->ndo_set_vf_rate
)
1470 err
= ops
->ndo_set_vf_rate(dev
, ivt
->vf
,
1475 case IFLA_VF_RATE
: {
1476 struct ifla_vf_rate
*ivt
;
1479 if (ops
->ndo_set_vf_rate
)
1480 err
= ops
->ndo_set_vf_rate(dev
, ivt
->vf
,
1485 case IFLA_VF_SPOOFCHK
: {
1486 struct ifla_vf_spoofchk
*ivs
;
1489 if (ops
->ndo_set_vf_spoofchk
)
1490 err
= ops
->ndo_set_vf_spoofchk(dev
, ivs
->vf
,
1494 case IFLA_VF_LINK_STATE
: {
1495 struct ifla_vf_link_state
*ivl
;
1498 if (ops
->ndo_set_vf_link_state
)
1499 err
= ops
->ndo_set_vf_link_state(dev
, ivl
->vf
,
1513 static int do_set_master(struct net_device
*dev
, int ifindex
)
1515 struct net_device
*upper_dev
= netdev_master_upper_dev_get(dev
);
1516 const struct net_device_ops
*ops
;
1520 if (upper_dev
->ifindex
== ifindex
)
1522 ops
= upper_dev
->netdev_ops
;
1523 if (ops
->ndo_del_slave
) {
1524 err
= ops
->ndo_del_slave(upper_dev
, dev
);
1533 upper_dev
= __dev_get_by_index(dev_net(dev
), ifindex
);
1536 ops
= upper_dev
->netdev_ops
;
1537 if (ops
->ndo_add_slave
) {
1538 err
= ops
->ndo_add_slave(upper_dev
, dev
);
1548 #define DO_SETLINK_MODIFIED 0x01
1549 /* notify flag means notify + modified. */
1550 #define DO_SETLINK_NOTIFY 0x03
1551 static int do_setlink(const struct sk_buff
*skb
,
1552 struct net_device
*dev
, struct ifinfomsg
*ifm
,
1553 struct nlattr
**tb
, char *ifname
, int status
)
1555 const struct net_device_ops
*ops
= dev
->netdev_ops
;
1558 if (tb
[IFLA_NET_NS_PID
] || tb
[IFLA_NET_NS_FD
]) {
1559 struct net
*net
= rtnl_link_get_net(dev_net(dev
), tb
);
1564 if (!netlink_ns_capable(skb
, net
->user_ns
, CAP_NET_ADMIN
)) {
1569 err
= dev_change_net_namespace(dev
, net
, ifname
);
1573 status
|= DO_SETLINK_MODIFIED
;
1577 struct rtnl_link_ifmap
*u_map
;
1580 if (!ops
->ndo_set_config
) {
1585 if (!netif_device_present(dev
)) {
1590 u_map
= nla_data(tb
[IFLA_MAP
]);
1591 k_map
.mem_start
= (unsigned long) u_map
->mem_start
;
1592 k_map
.mem_end
= (unsigned long) u_map
->mem_end
;
1593 k_map
.base_addr
= (unsigned short) u_map
->base_addr
;
1594 k_map
.irq
= (unsigned char) u_map
->irq
;
1595 k_map
.dma
= (unsigned char) u_map
->dma
;
1596 k_map
.port
= (unsigned char) u_map
->port
;
1598 err
= ops
->ndo_set_config(dev
, &k_map
);
1602 status
|= DO_SETLINK_NOTIFY
;
1605 if (tb
[IFLA_ADDRESS
]) {
1606 struct sockaddr
*sa
;
1609 len
= sizeof(sa_family_t
) + dev
->addr_len
;
1610 sa
= kmalloc(len
, GFP_KERNEL
);
1615 sa
->sa_family
= dev
->type
;
1616 memcpy(sa
->sa_data
, nla_data(tb
[IFLA_ADDRESS
]),
1618 err
= dev_set_mac_address(dev
, sa
);
1622 status
|= DO_SETLINK_MODIFIED
;
1626 err
= dev_set_mtu(dev
, nla_get_u32(tb
[IFLA_MTU
]));
1629 status
|= DO_SETLINK_MODIFIED
;
1632 if (tb
[IFLA_GROUP
]) {
1633 dev_set_group(dev
, nla_get_u32(tb
[IFLA_GROUP
]));
1634 status
|= DO_SETLINK_NOTIFY
;
1638 * Interface selected by interface index but interface
1639 * name provided implies that a name change has been
1642 if (ifm
->ifi_index
> 0 && ifname
[0]) {
1643 err
= dev_change_name(dev
, ifname
);
1646 status
|= DO_SETLINK_MODIFIED
;
1649 if (tb
[IFLA_IFALIAS
]) {
1650 err
= dev_set_alias(dev
, nla_data(tb
[IFLA_IFALIAS
]),
1651 nla_len(tb
[IFLA_IFALIAS
]));
1654 status
|= DO_SETLINK_NOTIFY
;
1657 if (tb
[IFLA_BROADCAST
]) {
1658 nla_memcpy(dev
->broadcast
, tb
[IFLA_BROADCAST
], dev
->addr_len
);
1659 call_netdevice_notifiers(NETDEV_CHANGEADDR
, dev
);
1662 if (ifm
->ifi_flags
|| ifm
->ifi_change
) {
1663 err
= dev_change_flags(dev
, rtnl_dev_combine_flags(dev
, ifm
));
1668 if (tb
[IFLA_MASTER
]) {
1669 err
= do_set_master(dev
, nla_get_u32(tb
[IFLA_MASTER
]));
1672 status
|= DO_SETLINK_MODIFIED
;
1675 if (tb
[IFLA_CARRIER
]) {
1676 err
= dev_change_carrier(dev
, nla_get_u8(tb
[IFLA_CARRIER
]));
1679 status
|= DO_SETLINK_MODIFIED
;
1682 if (tb
[IFLA_TXQLEN
]) {
1683 unsigned long value
= nla_get_u32(tb
[IFLA_TXQLEN
]);
1685 if (dev
->tx_queue_len
^ value
)
1686 status
|= DO_SETLINK_NOTIFY
;
1688 dev
->tx_queue_len
= value
;
1691 if (tb
[IFLA_OPERSTATE
])
1692 set_operstate(dev
, nla_get_u8(tb
[IFLA_OPERSTATE
]));
1694 if (tb
[IFLA_LINKMODE
]) {
1695 unsigned char value
= nla_get_u8(tb
[IFLA_LINKMODE
]);
1697 write_lock_bh(&dev_base_lock
);
1698 if (dev
->link_mode
^ value
)
1699 status
|= DO_SETLINK_NOTIFY
;
1700 dev
->link_mode
= value
;
1701 write_unlock_bh(&dev_base_lock
);
1704 if (tb
[IFLA_VFINFO_LIST
]) {
1705 struct nlattr
*attr
;
1707 nla_for_each_nested(attr
, tb
[IFLA_VFINFO_LIST
], rem
) {
1708 if (nla_type(attr
) != IFLA_VF_INFO
) {
1712 err
= do_setvfinfo(dev
, attr
);
1715 status
|= DO_SETLINK_NOTIFY
;
1720 if (tb
[IFLA_VF_PORTS
]) {
1721 struct nlattr
*port
[IFLA_PORT_MAX
+1];
1722 struct nlattr
*attr
;
1727 if (!ops
->ndo_set_vf_port
)
1730 nla_for_each_nested(attr
, tb
[IFLA_VF_PORTS
], rem
) {
1731 if (nla_type(attr
) != IFLA_VF_PORT
)
1733 err
= nla_parse_nested(port
, IFLA_PORT_MAX
,
1734 attr
, ifla_port_policy
);
1737 if (!port
[IFLA_PORT_VF
]) {
1741 vf
= nla_get_u32(port
[IFLA_PORT_VF
]);
1742 err
= ops
->ndo_set_vf_port(dev
, vf
, port
);
1745 status
|= DO_SETLINK_NOTIFY
;
1750 if (tb
[IFLA_PORT_SELF
]) {
1751 struct nlattr
*port
[IFLA_PORT_MAX
+1];
1753 err
= nla_parse_nested(port
, IFLA_PORT_MAX
,
1754 tb
[IFLA_PORT_SELF
], ifla_port_policy
);
1759 if (ops
->ndo_set_vf_port
)
1760 err
= ops
->ndo_set_vf_port(dev
, PORT_SELF_VF
, port
);
1763 status
|= DO_SETLINK_NOTIFY
;
1766 if (tb
[IFLA_AF_SPEC
]) {
1770 nla_for_each_nested(af
, tb
[IFLA_AF_SPEC
], rem
) {
1771 const struct rtnl_af_ops
*af_ops
;
1773 if (!(af_ops
= rtnl_af_lookup(nla_type(af
))))
1776 err
= af_ops
->set_link_af(dev
, af
);
1780 status
|= DO_SETLINK_NOTIFY
;
1786 if (status
& DO_SETLINK_MODIFIED
) {
1787 if (status
& DO_SETLINK_NOTIFY
)
1788 netdev_state_change(dev
);
1791 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",
1798 static int rtnl_setlink(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
1800 struct net
*net
= sock_net(skb
->sk
);
1801 struct ifinfomsg
*ifm
;
1802 struct net_device
*dev
;
1804 struct nlattr
*tb
[IFLA_MAX
+1];
1805 char ifname
[IFNAMSIZ
];
1807 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFLA_MAX
, ifla_policy
);
1811 if (tb
[IFLA_IFNAME
])
1812 nla_strlcpy(ifname
, tb
[IFLA_IFNAME
], IFNAMSIZ
);
1817 ifm
= nlmsg_data(nlh
);
1818 if (ifm
->ifi_index
> 0)
1819 dev
= __dev_get_by_index(net
, ifm
->ifi_index
);
1820 else if (tb
[IFLA_IFNAME
])
1821 dev
= __dev_get_by_name(net
, ifname
);
1830 err
= validate_linkmsg(dev
, tb
);
1834 err
= do_setlink(skb
, dev
, ifm
, tb
, ifname
, 0);
1839 static int rtnl_group_dellink(const struct net
*net
, int group
)
1841 struct net_device
*dev
, *aux
;
1842 LIST_HEAD(list_kill
);
1848 for_each_netdev(net
, dev
) {
1849 if (dev
->group
== group
) {
1850 const struct rtnl_link_ops
*ops
;
1853 ops
= dev
->rtnl_link_ops
;
1854 if (!ops
|| !ops
->dellink
)
1862 for_each_netdev_safe(net
, dev
, aux
) {
1863 if (dev
->group
== group
) {
1864 const struct rtnl_link_ops
*ops
;
1866 ops
= dev
->rtnl_link_ops
;
1867 ops
->dellink(dev
, &list_kill
);
1870 unregister_netdevice_many(&list_kill
);
1875 static int rtnl_dellink(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
1877 struct net
*net
= sock_net(skb
->sk
);
1878 const struct rtnl_link_ops
*ops
;
1879 struct net_device
*dev
;
1880 struct ifinfomsg
*ifm
;
1881 char ifname
[IFNAMSIZ
];
1882 struct nlattr
*tb
[IFLA_MAX
+1];
1884 LIST_HEAD(list_kill
);
1886 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFLA_MAX
, ifla_policy
);
1890 if (tb
[IFLA_IFNAME
])
1891 nla_strlcpy(ifname
, tb
[IFLA_IFNAME
], IFNAMSIZ
);
1893 ifm
= nlmsg_data(nlh
);
1894 if (ifm
->ifi_index
> 0)
1895 dev
= __dev_get_by_index(net
, ifm
->ifi_index
);
1896 else if (tb
[IFLA_IFNAME
])
1897 dev
= __dev_get_by_name(net
, ifname
);
1898 else if (tb
[IFLA_GROUP
])
1899 return rtnl_group_dellink(net
, nla_get_u32(tb
[IFLA_GROUP
]));
1906 ops
= dev
->rtnl_link_ops
;
1907 if (!ops
|| !ops
->dellink
)
1910 ops
->dellink(dev
, &list_kill
);
1911 unregister_netdevice_many(&list_kill
);
1915 int rtnl_configure_link(struct net_device
*dev
, const struct ifinfomsg
*ifm
)
1917 unsigned int old_flags
;
1920 old_flags
= dev
->flags
;
1921 if (ifm
&& (ifm
->ifi_flags
|| ifm
->ifi_change
)) {
1922 err
= __dev_change_flags(dev
, rtnl_dev_combine_flags(dev
, ifm
));
1927 dev
->rtnl_link_state
= RTNL_LINK_INITIALIZED
;
1929 __dev_notify_flags(dev
, old_flags
, ~0U);
1932 EXPORT_SYMBOL(rtnl_configure_link
);
1934 struct net_device
*rtnl_create_link(struct net
*net
,
1935 char *ifname
, unsigned char name_assign_type
,
1936 const struct rtnl_link_ops
*ops
, struct nlattr
*tb
[])
1939 struct net_device
*dev
;
1940 unsigned int num_tx_queues
= 1;
1941 unsigned int num_rx_queues
= 1;
1943 if (tb
[IFLA_NUM_TX_QUEUES
])
1944 num_tx_queues
= nla_get_u32(tb
[IFLA_NUM_TX_QUEUES
]);
1945 else if (ops
->get_num_tx_queues
)
1946 num_tx_queues
= ops
->get_num_tx_queues();
1948 if (tb
[IFLA_NUM_RX_QUEUES
])
1949 num_rx_queues
= nla_get_u32(tb
[IFLA_NUM_RX_QUEUES
]);
1950 else if (ops
->get_num_rx_queues
)
1951 num_rx_queues
= ops
->get_num_rx_queues();
1954 dev
= alloc_netdev_mqs(ops
->priv_size
, ifname
, name_assign_type
,
1955 ops
->setup
, num_tx_queues
, num_rx_queues
);
1959 dev_net_set(dev
, net
);
1960 dev
->rtnl_link_ops
= ops
;
1961 dev
->rtnl_link_state
= RTNL_LINK_INITIALIZING
;
1964 dev
->mtu
= nla_get_u32(tb
[IFLA_MTU
]);
1965 if (tb
[IFLA_ADDRESS
]) {
1966 memcpy(dev
->dev_addr
, nla_data(tb
[IFLA_ADDRESS
]),
1967 nla_len(tb
[IFLA_ADDRESS
]));
1968 dev
->addr_assign_type
= NET_ADDR_SET
;
1970 if (tb
[IFLA_BROADCAST
])
1971 memcpy(dev
->broadcast
, nla_data(tb
[IFLA_BROADCAST
]),
1972 nla_len(tb
[IFLA_BROADCAST
]));
1973 if (tb
[IFLA_TXQLEN
])
1974 dev
->tx_queue_len
= nla_get_u32(tb
[IFLA_TXQLEN
]);
1975 if (tb
[IFLA_OPERSTATE
])
1976 set_operstate(dev
, nla_get_u8(tb
[IFLA_OPERSTATE
]));
1977 if (tb
[IFLA_LINKMODE
])
1978 dev
->link_mode
= nla_get_u8(tb
[IFLA_LINKMODE
]);
1980 dev_set_group(dev
, nla_get_u32(tb
[IFLA_GROUP
]));
1985 return ERR_PTR(err
);
1987 EXPORT_SYMBOL(rtnl_create_link
);
1989 static int rtnl_group_changelink(const struct sk_buff
*skb
,
1990 struct net
*net
, int group
,
1991 struct ifinfomsg
*ifm
,
1994 struct net_device
*dev
;
1997 for_each_netdev(net
, dev
) {
1998 if (dev
->group
== group
) {
1999 err
= do_setlink(skb
, dev
, ifm
, tb
, NULL
, 0);
2008 static int rtnl_newlink(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
2010 struct net
*net
= sock_net(skb
->sk
);
2011 const struct rtnl_link_ops
*ops
;
2012 const struct rtnl_link_ops
*m_ops
= NULL
;
2013 struct net_device
*dev
;
2014 struct net_device
*master_dev
= NULL
;
2015 struct ifinfomsg
*ifm
;
2016 char kind
[MODULE_NAME_LEN
];
2017 char ifname
[IFNAMSIZ
];
2018 struct nlattr
*tb
[IFLA_MAX
+1];
2019 struct nlattr
*linkinfo
[IFLA_INFO_MAX
+1];
2020 unsigned char name_assign_type
= NET_NAME_USER
;
2023 #ifdef CONFIG_MODULES
2026 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFLA_MAX
, ifla_policy
);
2030 if (tb
[IFLA_IFNAME
])
2031 nla_strlcpy(ifname
, tb
[IFLA_IFNAME
], IFNAMSIZ
);
2035 ifm
= nlmsg_data(nlh
);
2036 if (ifm
->ifi_index
> 0)
2037 dev
= __dev_get_by_index(net
, ifm
->ifi_index
);
2040 dev
= __dev_get_by_name(net
, ifname
);
2046 master_dev
= netdev_master_upper_dev_get(dev
);
2048 m_ops
= master_dev
->rtnl_link_ops
;
2051 err
= validate_linkmsg(dev
, tb
);
2055 if (tb
[IFLA_LINKINFO
]) {
2056 err
= nla_parse_nested(linkinfo
, IFLA_INFO_MAX
,
2057 tb
[IFLA_LINKINFO
], ifla_info_policy
);
2061 memset(linkinfo
, 0, sizeof(linkinfo
));
2063 if (linkinfo
[IFLA_INFO_KIND
]) {
2064 nla_strlcpy(kind
, linkinfo
[IFLA_INFO_KIND
], sizeof(kind
));
2065 ops
= rtnl_link_ops_get(kind
);
2072 struct nlattr
*attr
[ops
? ops
->maxtype
+ 1 : 1];
2073 struct nlattr
*slave_attr
[m_ops
? m_ops
->slave_maxtype
+ 1 : 1];
2074 struct nlattr
**data
= NULL
;
2075 struct nlattr
**slave_data
= NULL
;
2076 struct net
*dest_net
, *link_net
= NULL
;
2079 if (ops
->maxtype
&& linkinfo
[IFLA_INFO_DATA
]) {
2080 err
= nla_parse_nested(attr
, ops
->maxtype
,
2081 linkinfo
[IFLA_INFO_DATA
],
2087 if (ops
->validate
) {
2088 err
= ops
->validate(tb
, data
);
2095 if (m_ops
->slave_maxtype
&&
2096 linkinfo
[IFLA_INFO_SLAVE_DATA
]) {
2097 err
= nla_parse_nested(slave_attr
,
2098 m_ops
->slave_maxtype
,
2099 linkinfo
[IFLA_INFO_SLAVE_DATA
],
2100 m_ops
->slave_policy
);
2103 slave_data
= slave_attr
;
2105 if (m_ops
->slave_validate
) {
2106 err
= m_ops
->slave_validate(tb
, slave_data
);
2115 if (nlh
->nlmsg_flags
& NLM_F_EXCL
)
2117 if (nlh
->nlmsg_flags
& NLM_F_REPLACE
)
2120 if (linkinfo
[IFLA_INFO_DATA
]) {
2121 if (!ops
|| ops
!= dev
->rtnl_link_ops
||
2125 err
= ops
->changelink(dev
, tb
, data
);
2128 status
|= DO_SETLINK_NOTIFY
;
2131 if (linkinfo
[IFLA_INFO_SLAVE_DATA
]) {
2132 if (!m_ops
|| !m_ops
->slave_changelink
)
2135 err
= m_ops
->slave_changelink(master_dev
, dev
,
2139 status
|= DO_SETLINK_NOTIFY
;
2142 return do_setlink(skb
, dev
, ifm
, tb
, ifname
, status
);
2145 if (!(nlh
->nlmsg_flags
& NLM_F_CREATE
)) {
2146 if (ifm
->ifi_index
== 0 && tb
[IFLA_GROUP
])
2147 return rtnl_group_changelink(skb
, net
,
2148 nla_get_u32(tb
[IFLA_GROUP
]),
2153 if (tb
[IFLA_MAP
] || tb
[IFLA_MASTER
] || tb
[IFLA_PROTINFO
])
2157 #ifdef CONFIG_MODULES
2160 request_module("rtnl-link-%s", kind
);
2162 ops
= rtnl_link_ops_get(kind
);
2174 snprintf(ifname
, IFNAMSIZ
, "%s%%d", ops
->kind
);
2175 name_assign_type
= NET_NAME_ENUM
;
2178 dest_net
= rtnl_link_get_net(net
, tb
);
2179 if (IS_ERR(dest_net
))
2180 return PTR_ERR(dest_net
);
2183 if (!netlink_ns_capable(skb
, dest_net
->user_ns
, CAP_NET_ADMIN
))
2186 if (tb
[IFLA_LINK_NETNSID
]) {
2187 int id
= nla_get_s32(tb
[IFLA_LINK_NETNSID
]);
2189 link_net
= get_net_ns_by_id(dest_net
, id
);
2195 if (!netlink_ns_capable(skb
, link_net
->user_ns
, CAP_NET_ADMIN
))
2199 dev
= rtnl_create_link(link_net
? : dest_net
, ifname
,
2200 name_assign_type
, ops
, tb
);
2206 dev
->ifindex
= ifm
->ifi_index
;
2209 err
= ops
->newlink(link_net
? : net
, dev
, tb
, data
);
2210 /* Drivers should call free_netdev() in ->destructor
2211 * and unregister it on failure after registration
2212 * so that device could be finally freed in rtnl_unlock.
2215 /* If device is not registered at all, free it now */
2216 if (dev
->reg_state
== NETREG_UNINITIALIZED
)
2221 err
= register_netdevice(dev
);
2227 err
= rtnl_configure_link(dev
, ifm
);
2229 goto out_unregister
;
2231 err
= dev_change_net_namespace(dev
, dest_net
, ifname
);
2233 goto out_unregister
;
2242 LIST_HEAD(list_kill
);
2244 ops
->dellink(dev
, &list_kill
);
2245 unregister_netdevice_many(&list_kill
);
2247 unregister_netdevice(dev
);
2253 static int rtnl_getlink(struct sk_buff
*skb
, struct nlmsghdr
* nlh
)
2255 struct net
*net
= sock_net(skb
->sk
);
2256 struct ifinfomsg
*ifm
;
2257 char ifname
[IFNAMSIZ
];
2258 struct nlattr
*tb
[IFLA_MAX
+1];
2259 struct net_device
*dev
= NULL
;
2260 struct sk_buff
*nskb
;
2262 u32 ext_filter_mask
= 0;
2264 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFLA_MAX
, ifla_policy
);
2268 if (tb
[IFLA_IFNAME
])
2269 nla_strlcpy(ifname
, tb
[IFLA_IFNAME
], IFNAMSIZ
);
2271 if (tb
[IFLA_EXT_MASK
])
2272 ext_filter_mask
= nla_get_u32(tb
[IFLA_EXT_MASK
]);
2274 ifm
= nlmsg_data(nlh
);
2275 if (ifm
->ifi_index
> 0)
2276 dev
= __dev_get_by_index(net
, ifm
->ifi_index
);
2277 else if (tb
[IFLA_IFNAME
])
2278 dev
= __dev_get_by_name(net
, ifname
);
2285 nskb
= nlmsg_new(if_nlmsg_size(dev
, ext_filter_mask
), GFP_KERNEL
);
2289 err
= rtnl_fill_ifinfo(nskb
, dev
, RTM_NEWLINK
, NETLINK_CB(skb
).portid
,
2290 nlh
->nlmsg_seq
, 0, 0, ext_filter_mask
);
2292 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2293 WARN_ON(err
== -EMSGSIZE
);
2296 err
= rtnl_unicast(nskb
, net
, NETLINK_CB(skb
).portid
);
2301 static u16
rtnl_calcit(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
2303 struct net
*net
= sock_net(skb
->sk
);
2304 struct net_device
*dev
;
2305 struct nlattr
*tb
[IFLA_MAX
+1];
2306 u32 ext_filter_mask
= 0;
2307 u16 min_ifinfo_dump_size
= 0;
2310 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2311 hdrlen
= nlmsg_len(nlh
) < sizeof(struct ifinfomsg
) ?
2312 sizeof(struct rtgenmsg
) : sizeof(struct ifinfomsg
);
2314 if (nlmsg_parse(nlh
, hdrlen
, tb
, IFLA_MAX
, ifla_policy
) >= 0) {
2315 if (tb
[IFLA_EXT_MASK
])
2316 ext_filter_mask
= nla_get_u32(tb
[IFLA_EXT_MASK
]);
2319 if (!ext_filter_mask
)
2320 return NLMSG_GOODSIZE
;
2322 * traverse the list of net devices and compute the minimum
2323 * buffer size based upon the filter mask.
2325 list_for_each_entry(dev
, &net
->dev_base_head
, dev_list
) {
2326 min_ifinfo_dump_size
= max_t(u16
, min_ifinfo_dump_size
,
2331 return min_ifinfo_dump_size
;
2334 static int rtnl_dump_all(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2337 int s_idx
= cb
->family
;
2341 for (idx
= 1; idx
<= RTNL_FAMILY_MAX
; idx
++) {
2342 int type
= cb
->nlh
->nlmsg_type
-RTM_BASE
;
2343 if (idx
< s_idx
|| idx
== PF_PACKET
)
2345 if (rtnl_msg_handlers
[idx
] == NULL
||
2346 rtnl_msg_handlers
[idx
][type
].dumpit
== NULL
)
2349 memset(&cb
->args
[0], 0, sizeof(cb
->args
));
2353 if (rtnl_msg_handlers
[idx
][type
].dumpit(skb
, cb
))
2361 struct sk_buff
*rtmsg_ifinfo_build_skb(int type
, struct net_device
*dev
,
2362 unsigned int change
, gfp_t flags
)
2364 struct net
*net
= dev_net(dev
);
2365 struct sk_buff
*skb
;
2367 size_t if_info_size
;
2369 skb
= nlmsg_new((if_info_size
= if_nlmsg_size(dev
, 0)), flags
);
2373 err
= rtnl_fill_ifinfo(skb
, dev
, type
, 0, 0, change
, 0, 0);
2375 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2376 WARN_ON(err
== -EMSGSIZE
);
2383 rtnl_set_sk_err(net
, RTNLGRP_LINK
, err
);
2387 void rtmsg_ifinfo_send(struct sk_buff
*skb
, struct net_device
*dev
, gfp_t flags
)
2389 struct net
*net
= dev_net(dev
);
2391 rtnl_notify(skb
, net
, 0, RTNLGRP_LINK
, NULL
, flags
);
2394 void rtmsg_ifinfo(int type
, struct net_device
*dev
, unsigned int change
,
2397 struct sk_buff
*skb
;
2399 skb
= rtmsg_ifinfo_build_skb(type
, dev
, change
, flags
);
2401 rtmsg_ifinfo_send(skb
, dev
, flags
);
2403 EXPORT_SYMBOL(rtmsg_ifinfo
);
2405 static int nlmsg_populate_fdb_fill(struct sk_buff
*skb
,
2406 struct net_device
*dev
,
2407 u8
*addr
, u32 pid
, u32 seq
,
2408 int type
, unsigned int flags
,
2411 struct nlmsghdr
*nlh
;
2414 nlh
= nlmsg_put(skb
, pid
, seq
, type
, sizeof(*ndm
), nlflags
);
2418 ndm
= nlmsg_data(nlh
);
2419 ndm
->ndm_family
= AF_BRIDGE
;
2422 ndm
->ndm_flags
= flags
;
2424 ndm
->ndm_ifindex
= dev
->ifindex
;
2425 ndm
->ndm_state
= NUD_PERMANENT
;
2427 if (nla_put(skb
, NDA_LLADDR
, ETH_ALEN
, addr
))
2428 goto nla_put_failure
;
2430 nlmsg_end(skb
, nlh
);
2434 nlmsg_cancel(skb
, nlh
);
2438 static inline size_t rtnl_fdb_nlmsg_size(void)
2440 return NLMSG_ALIGN(sizeof(struct ndmsg
)) + nla_total_size(ETH_ALEN
);
2443 static void rtnl_fdb_notify(struct net_device
*dev
, u8
*addr
, int type
)
2445 struct net
*net
= dev_net(dev
);
2446 struct sk_buff
*skb
;
2449 skb
= nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC
);
2453 err
= nlmsg_populate_fdb_fill(skb
, dev
, addr
, 0, 0, type
, NTF_SELF
, 0);
2459 rtnl_notify(skb
, net
, 0, RTNLGRP_NEIGH
, NULL
, GFP_ATOMIC
);
2462 rtnl_set_sk_err(net
, RTNLGRP_NEIGH
, err
);
2466 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2468 int ndo_dflt_fdb_add(struct ndmsg
*ndm
,
2469 struct nlattr
*tb
[],
2470 struct net_device
*dev
,
2471 const unsigned char *addr
, u16 vid
,
2476 /* If aging addresses are supported device will need to
2477 * implement its own handler for this.
2479 if (ndm
->ndm_state
&& !(ndm
->ndm_state
& NUD_PERMANENT
)) {
2480 pr_info("%s: FDB only supports static addresses\n", dev
->name
);
2485 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev
->name
);
2489 if (is_unicast_ether_addr(addr
) || is_link_local_ether_addr(addr
))
2490 err
= dev_uc_add_excl(dev
, addr
);
2491 else if (is_multicast_ether_addr(addr
))
2492 err
= dev_mc_add_excl(dev
, addr
);
2494 /* Only return duplicate errors if NLM_F_EXCL is set */
2495 if (err
== -EEXIST
&& !(flags
& NLM_F_EXCL
))
2500 EXPORT_SYMBOL(ndo_dflt_fdb_add
);
2502 static int fdb_vid_parse(struct nlattr
*vlan_attr
, u16
*p_vid
)
2507 if (nla_len(vlan_attr
) != sizeof(u16
)) {
2508 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2512 vid
= nla_get_u16(vlan_attr
);
2514 if (!vid
|| vid
>= VLAN_VID_MASK
) {
2515 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2524 static int rtnl_fdb_add(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
2526 struct net
*net
= sock_net(skb
->sk
);
2528 struct nlattr
*tb
[NDA_MAX
+1];
2529 struct net_device
*dev
;
2534 err
= nlmsg_parse(nlh
, sizeof(*ndm
), tb
, NDA_MAX
, NULL
);
2538 ndm
= nlmsg_data(nlh
);
2539 if (ndm
->ndm_ifindex
== 0) {
2540 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2544 dev
= __dev_get_by_index(net
, ndm
->ndm_ifindex
);
2546 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2550 if (!tb
[NDA_LLADDR
] || nla_len(tb
[NDA_LLADDR
]) != ETH_ALEN
) {
2551 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2555 addr
= nla_data(tb
[NDA_LLADDR
]);
2557 err
= fdb_vid_parse(tb
[NDA_VLAN
], &vid
);
2563 /* Support fdb on master device the net/bridge default case */
2564 if ((!ndm
->ndm_flags
|| ndm
->ndm_flags
& NTF_MASTER
) &&
2565 (dev
->priv_flags
& IFF_BRIDGE_PORT
)) {
2566 struct net_device
*br_dev
= netdev_master_upper_dev_get(dev
);
2567 const struct net_device_ops
*ops
= br_dev
->netdev_ops
;
2569 err
= ops
->ndo_fdb_add(ndm
, tb
, dev
, addr
, vid
,
2574 ndm
->ndm_flags
&= ~NTF_MASTER
;
2577 /* Embedded bridge, macvlan, and any other device support */
2578 if ((ndm
->ndm_flags
& NTF_SELF
)) {
2579 if (dev
->netdev_ops
->ndo_fdb_add
)
2580 err
= dev
->netdev_ops
->ndo_fdb_add(ndm
, tb
, dev
, addr
,
2584 err
= ndo_dflt_fdb_add(ndm
, tb
, dev
, addr
, vid
,
2588 rtnl_fdb_notify(dev
, addr
, RTM_NEWNEIGH
);
2589 ndm
->ndm_flags
&= ~NTF_SELF
;
2597 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2599 int ndo_dflt_fdb_del(struct ndmsg
*ndm
,
2600 struct nlattr
*tb
[],
2601 struct net_device
*dev
,
2602 const unsigned char *addr
, u16 vid
)
2606 /* If aging addresses are supported device will need to
2607 * implement its own handler for this.
2609 if (!(ndm
->ndm_state
& NUD_PERMANENT
)) {
2610 pr_info("%s: FDB only supports static addresses\n", dev
->name
);
2614 if (is_unicast_ether_addr(addr
) || is_link_local_ether_addr(addr
))
2615 err
= dev_uc_del(dev
, addr
);
2616 else if (is_multicast_ether_addr(addr
))
2617 err
= dev_mc_del(dev
, addr
);
2621 EXPORT_SYMBOL(ndo_dflt_fdb_del
);
2623 static int rtnl_fdb_del(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
2625 struct net
*net
= sock_net(skb
->sk
);
2627 struct nlattr
*tb
[NDA_MAX
+1];
2628 struct net_device
*dev
;
2633 if (!netlink_capable(skb
, CAP_NET_ADMIN
))
2636 err
= nlmsg_parse(nlh
, sizeof(*ndm
), tb
, NDA_MAX
, NULL
);
2640 ndm
= nlmsg_data(nlh
);
2641 if (ndm
->ndm_ifindex
== 0) {
2642 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2646 dev
= __dev_get_by_index(net
, ndm
->ndm_ifindex
);
2648 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2652 if (!tb
[NDA_LLADDR
] || nla_len(tb
[NDA_LLADDR
]) != ETH_ALEN
) {
2653 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2657 addr
= nla_data(tb
[NDA_LLADDR
]);
2659 err
= fdb_vid_parse(tb
[NDA_VLAN
], &vid
);
2665 /* Support fdb on master device the net/bridge default case */
2666 if ((!ndm
->ndm_flags
|| ndm
->ndm_flags
& NTF_MASTER
) &&
2667 (dev
->priv_flags
& IFF_BRIDGE_PORT
)) {
2668 struct net_device
*br_dev
= netdev_master_upper_dev_get(dev
);
2669 const struct net_device_ops
*ops
= br_dev
->netdev_ops
;
2671 if (ops
->ndo_fdb_del
)
2672 err
= ops
->ndo_fdb_del(ndm
, tb
, dev
, addr
, vid
);
2677 ndm
->ndm_flags
&= ~NTF_MASTER
;
2680 /* Embedded bridge, macvlan, and any other device support */
2681 if (ndm
->ndm_flags
& NTF_SELF
) {
2682 if (dev
->netdev_ops
->ndo_fdb_del
)
2683 err
= dev
->netdev_ops
->ndo_fdb_del(ndm
, tb
, dev
, addr
,
2686 err
= ndo_dflt_fdb_del(ndm
, tb
, dev
, addr
, vid
);
2689 rtnl_fdb_notify(dev
, addr
, RTM_DELNEIGH
);
2690 ndm
->ndm_flags
&= ~NTF_SELF
;
2697 static int nlmsg_populate_fdb(struct sk_buff
*skb
,
2698 struct netlink_callback
*cb
,
2699 struct net_device
*dev
,
2701 struct netdev_hw_addr_list
*list
)
2703 struct netdev_hw_addr
*ha
;
2707 portid
= NETLINK_CB(cb
->skb
).portid
;
2708 seq
= cb
->nlh
->nlmsg_seq
;
2710 list_for_each_entry(ha
, &list
->list
, list
) {
2711 if (*idx
< cb
->args
[0])
2714 err
= nlmsg_populate_fdb_fill(skb
, dev
, ha
->addr
,
2716 RTM_NEWNEIGH
, NTF_SELF
,
2727 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
2728 * @nlh: netlink message header
2731 * Default netdevice operation to dump the existing unicast address list.
2732 * Returns number of addresses from list put in skb.
2734 int ndo_dflt_fdb_dump(struct sk_buff
*skb
,
2735 struct netlink_callback
*cb
,
2736 struct net_device
*dev
,
2737 struct net_device
*filter_dev
,
2742 netif_addr_lock_bh(dev
);
2743 err
= nlmsg_populate_fdb(skb
, cb
, dev
, &idx
, &dev
->uc
);
2746 nlmsg_populate_fdb(skb
, cb
, dev
, &idx
, &dev
->mc
);
2748 netif_addr_unlock_bh(dev
);
2751 EXPORT_SYMBOL(ndo_dflt_fdb_dump
);
2753 static int rtnl_fdb_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2755 struct net_device
*dev
;
2756 struct nlattr
*tb
[IFLA_MAX
+1];
2757 struct net_device
*bdev
= NULL
;
2758 struct net_device
*br_dev
= NULL
;
2759 const struct net_device_ops
*ops
= NULL
;
2760 const struct net_device_ops
*cops
= NULL
;
2761 struct ifinfomsg
*ifm
= nlmsg_data(cb
->nlh
);
2762 struct net
*net
= sock_net(skb
->sk
);
2767 if (nlmsg_parse(cb
->nlh
, sizeof(struct ifinfomsg
), tb
, IFLA_MAX
,
2768 ifla_policy
) == 0) {
2769 if (tb
[IFLA_MASTER
])
2770 br_idx
= nla_get_u32(tb
[IFLA_MASTER
]);
2773 brport_idx
= ifm
->ifi_index
;
2776 br_dev
= __dev_get_by_index(net
, br_idx
);
2780 ops
= br_dev
->netdev_ops
;
2784 for_each_netdev(net
, dev
) {
2785 if (brport_idx
&& (dev
->ifindex
!= brport_idx
))
2788 if (!br_idx
) { /* user did not specify a specific bridge */
2789 if (dev
->priv_flags
& IFF_BRIDGE_PORT
) {
2790 br_dev
= netdev_master_upper_dev_get(dev
);
2791 cops
= br_dev
->netdev_ops
;
2796 if (dev
!= br_dev
&&
2797 !(dev
->priv_flags
& IFF_BRIDGE_PORT
))
2800 if (br_dev
!= netdev_master_upper_dev_get(dev
) &&
2801 !(dev
->priv_flags
& IFF_EBRIDGE
))
2808 if (dev
->priv_flags
& IFF_BRIDGE_PORT
) {
2809 if (cops
&& cops
->ndo_fdb_dump
)
2810 idx
= cops
->ndo_fdb_dump(skb
, cb
, br_dev
, dev
,
2814 if (dev
->netdev_ops
->ndo_fdb_dump
)
2815 idx
= dev
->netdev_ops
->ndo_fdb_dump(skb
, cb
, dev
, NULL
,
2818 idx
= ndo_dflt_fdb_dump(skb
, cb
, dev
, NULL
, idx
);
2827 static int brport_nla_put_flag(struct sk_buff
*skb
, u32 flags
, u32 mask
,
2828 unsigned int attrnum
, unsigned int flag
)
2831 return nla_put_u8(skb
, attrnum
, !!(flags
& flag
));
2835 int ndo_dflt_bridge_getlink(struct sk_buff
*skb
, u32 pid
, u32 seq
,
2836 struct net_device
*dev
, u16 mode
,
2837 u32 flags
, u32 mask
)
2839 struct nlmsghdr
*nlh
;
2840 struct ifinfomsg
*ifm
;
2841 struct nlattr
*br_afspec
;
2842 struct nlattr
*protinfo
;
2843 u8 operstate
= netif_running(dev
) ? dev
->operstate
: IF_OPER_DOWN
;
2844 struct net_device
*br_dev
= netdev_master_upper_dev_get(dev
);
2846 nlh
= nlmsg_put(skb
, pid
, seq
, RTM_NEWLINK
, sizeof(*ifm
), NLM_F_MULTI
);
2850 ifm
= nlmsg_data(nlh
);
2851 ifm
->ifi_family
= AF_BRIDGE
;
2853 ifm
->ifi_type
= dev
->type
;
2854 ifm
->ifi_index
= dev
->ifindex
;
2855 ifm
->ifi_flags
= dev_get_flags(dev
);
2856 ifm
->ifi_change
= 0;
2859 if (nla_put_string(skb
, IFLA_IFNAME
, dev
->name
) ||
2860 nla_put_u32(skb
, IFLA_MTU
, dev
->mtu
) ||
2861 nla_put_u8(skb
, IFLA_OPERSTATE
, operstate
) ||
2863 nla_put_u32(skb
, IFLA_MASTER
, br_dev
->ifindex
)) ||
2865 nla_put(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
)) ||
2866 (dev
->ifindex
!= dev_get_iflink(dev
) &&
2867 nla_put_u32(skb
, IFLA_LINK
, dev_get_iflink(dev
))))
2868 goto nla_put_failure
;
2870 br_afspec
= nla_nest_start(skb
, IFLA_AF_SPEC
);
2872 goto nla_put_failure
;
2874 if (nla_put_u16(skb
, IFLA_BRIDGE_FLAGS
, BRIDGE_FLAGS_SELF
)) {
2875 nla_nest_cancel(skb
, br_afspec
);
2876 goto nla_put_failure
;
2879 if (mode
!= BRIDGE_MODE_UNDEF
) {
2880 if (nla_put_u16(skb
, IFLA_BRIDGE_MODE
, mode
)) {
2881 nla_nest_cancel(skb
, br_afspec
);
2882 goto nla_put_failure
;
2885 nla_nest_end(skb
, br_afspec
);
2887 protinfo
= nla_nest_start(skb
, IFLA_PROTINFO
| NLA_F_NESTED
);
2889 goto nla_put_failure
;
2891 if (brport_nla_put_flag(skb
, flags
, mask
,
2892 IFLA_BRPORT_MODE
, BR_HAIRPIN_MODE
) ||
2893 brport_nla_put_flag(skb
, flags
, mask
,
2894 IFLA_BRPORT_GUARD
, BR_BPDU_GUARD
) ||
2895 brport_nla_put_flag(skb
, flags
, mask
,
2896 IFLA_BRPORT_FAST_LEAVE
,
2897 BR_MULTICAST_FAST_LEAVE
) ||
2898 brport_nla_put_flag(skb
, flags
, mask
,
2899 IFLA_BRPORT_PROTECT
, BR_ROOT_BLOCK
) ||
2900 brport_nla_put_flag(skb
, flags
, mask
,
2901 IFLA_BRPORT_LEARNING
, BR_LEARNING
) ||
2902 brport_nla_put_flag(skb
, flags
, mask
,
2903 IFLA_BRPORT_LEARNING_SYNC
, BR_LEARNING_SYNC
) ||
2904 brport_nla_put_flag(skb
, flags
, mask
,
2905 IFLA_BRPORT_UNICAST_FLOOD
, BR_FLOOD
) ||
2906 brport_nla_put_flag(skb
, flags
, mask
,
2907 IFLA_BRPORT_PROXYARP
, BR_PROXYARP
)) {
2908 nla_nest_cancel(skb
, protinfo
);
2909 goto nla_put_failure
;
2912 nla_nest_end(skb
, protinfo
);
2914 nlmsg_end(skb
, nlh
);
2917 nlmsg_cancel(skb
, nlh
);
2920 EXPORT_SYMBOL(ndo_dflt_bridge_getlink
);
2922 static int rtnl_bridge_getlink(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2924 struct net
*net
= sock_net(skb
->sk
);
2925 struct net_device
*dev
;
2927 u32 portid
= NETLINK_CB(cb
->skb
).portid
;
2928 u32 seq
= cb
->nlh
->nlmsg_seq
;
2929 u32 filter_mask
= 0;
2931 if (nlmsg_len(cb
->nlh
) > sizeof(struct ifinfomsg
)) {
2932 struct nlattr
*extfilt
;
2934 extfilt
= nlmsg_find_attr(cb
->nlh
, sizeof(struct ifinfomsg
),
2937 if (nla_len(extfilt
) < sizeof(filter_mask
))
2940 filter_mask
= nla_get_u32(extfilt
);
2945 for_each_netdev_rcu(net
, dev
) {
2946 const struct net_device_ops
*ops
= dev
->netdev_ops
;
2947 struct net_device
*br_dev
= netdev_master_upper_dev_get(dev
);
2949 if (br_dev
&& br_dev
->netdev_ops
->ndo_bridge_getlink
) {
2950 if (idx
>= cb
->args
[0] &&
2951 br_dev
->netdev_ops
->ndo_bridge_getlink(
2952 skb
, portid
, seq
, dev
, filter_mask
) < 0)
2957 if (ops
->ndo_bridge_getlink
) {
2958 if (idx
>= cb
->args
[0] &&
2959 ops
->ndo_bridge_getlink(skb
, portid
, seq
, dev
,
2971 static inline size_t bridge_nlmsg_size(void)
2973 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
2974 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
2975 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
2976 + nla_total_size(sizeof(u32
)) /* IFLA_MASTER */
2977 + nla_total_size(sizeof(u32
)) /* IFLA_MTU */
2978 + nla_total_size(sizeof(u32
)) /* IFLA_LINK */
2979 + nla_total_size(sizeof(u32
)) /* IFLA_OPERSTATE */
2980 + nla_total_size(sizeof(u8
)) /* IFLA_PROTINFO */
2981 + nla_total_size(sizeof(struct nlattr
)) /* IFLA_AF_SPEC */
2982 + nla_total_size(sizeof(u16
)) /* IFLA_BRIDGE_FLAGS */
2983 + nla_total_size(sizeof(u16
)); /* IFLA_BRIDGE_MODE */
2986 static int rtnl_bridge_notify(struct net_device
*dev
)
2988 struct net
*net
= dev_net(dev
);
2989 struct sk_buff
*skb
;
2990 int err
= -EOPNOTSUPP
;
2992 if (!dev
->netdev_ops
->ndo_bridge_getlink
)
2995 skb
= nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC
);
3001 err
= dev
->netdev_ops
->ndo_bridge_getlink(skb
, 0, 0, dev
, 0);
3008 rtnl_notify(skb
, net
, 0, RTNLGRP_LINK
, NULL
, GFP_ATOMIC
);
3011 WARN_ON(err
== -EMSGSIZE
);
3014 rtnl_set_sk_err(net
, RTNLGRP_LINK
, err
);
3018 static int rtnl_bridge_setlink(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
3020 struct net
*net
= sock_net(skb
->sk
);
3021 struct ifinfomsg
*ifm
;
3022 struct net_device
*dev
;
3023 struct nlattr
*br_spec
, *attr
= NULL
;
3024 int rem
, err
= -EOPNOTSUPP
;
3026 bool have_flags
= false;
3028 if (nlmsg_len(nlh
) < sizeof(*ifm
))
3031 ifm
= nlmsg_data(nlh
);
3032 if (ifm
->ifi_family
!= AF_BRIDGE
)
3033 return -EPFNOSUPPORT
;
3035 dev
= __dev_get_by_index(net
, ifm
->ifi_index
);
3037 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3041 br_spec
= nlmsg_find_attr(nlh
, sizeof(struct ifinfomsg
), IFLA_AF_SPEC
);
3043 nla_for_each_nested(attr
, br_spec
, rem
) {
3044 if (nla_type(attr
) == IFLA_BRIDGE_FLAGS
) {
3045 if (nla_len(attr
) < sizeof(flags
))
3049 flags
= nla_get_u16(attr
);
3055 if (!flags
|| (flags
& BRIDGE_FLAGS_MASTER
)) {
3056 struct net_device
*br_dev
= netdev_master_upper_dev_get(dev
);
3058 if (!br_dev
|| !br_dev
->netdev_ops
->ndo_bridge_setlink
) {
3063 err
= br_dev
->netdev_ops
->ndo_bridge_setlink(dev
, nlh
, flags
);
3067 flags
&= ~BRIDGE_FLAGS_MASTER
;
3070 if ((flags
& BRIDGE_FLAGS_SELF
)) {
3071 if (!dev
->netdev_ops
->ndo_bridge_setlink
)
3074 err
= dev
->netdev_ops
->ndo_bridge_setlink(dev
, nlh
,
3077 flags
&= ~BRIDGE_FLAGS_SELF
;
3079 /* Generate event to notify upper layer of bridge
3082 err
= rtnl_bridge_notify(dev
);
3087 memcpy(nla_data(attr
), &flags
, sizeof(flags
));
3092 static int rtnl_bridge_dellink(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
3094 struct net
*net
= sock_net(skb
->sk
);
3095 struct ifinfomsg
*ifm
;
3096 struct net_device
*dev
;
3097 struct nlattr
*br_spec
, *attr
= NULL
;
3098 int rem
, err
= -EOPNOTSUPP
;
3100 bool have_flags
= false;
3102 if (nlmsg_len(nlh
) < sizeof(*ifm
))
3105 ifm
= nlmsg_data(nlh
);
3106 if (ifm
->ifi_family
!= AF_BRIDGE
)
3107 return -EPFNOSUPPORT
;
3109 dev
= __dev_get_by_index(net
, ifm
->ifi_index
);
3111 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3115 br_spec
= nlmsg_find_attr(nlh
, sizeof(struct ifinfomsg
), IFLA_AF_SPEC
);
3117 nla_for_each_nested(attr
, br_spec
, rem
) {
3118 if (nla_type(attr
) == IFLA_BRIDGE_FLAGS
) {
3119 if (nla_len(attr
) < sizeof(flags
))
3123 flags
= nla_get_u16(attr
);
3129 if (!flags
|| (flags
& BRIDGE_FLAGS_MASTER
)) {
3130 struct net_device
*br_dev
= netdev_master_upper_dev_get(dev
);
3132 if (!br_dev
|| !br_dev
->netdev_ops
->ndo_bridge_dellink
) {
3137 err
= br_dev
->netdev_ops
->ndo_bridge_dellink(dev
, nlh
, flags
);
3141 flags
&= ~BRIDGE_FLAGS_MASTER
;
3144 if ((flags
& BRIDGE_FLAGS_SELF
)) {
3145 if (!dev
->netdev_ops
->ndo_bridge_dellink
)
3148 err
= dev
->netdev_ops
->ndo_bridge_dellink(dev
, nlh
,
3152 flags
&= ~BRIDGE_FLAGS_SELF
;
3154 /* Generate event to notify upper layer of bridge
3157 err
= rtnl_bridge_notify(dev
);
3162 memcpy(nla_data(attr
), &flags
, sizeof(flags
));
3167 /* Process one rtnetlink message. */
3169 static int rtnetlink_rcv_msg(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
3171 struct net
*net
= sock_net(skb
->sk
);
3172 rtnl_doit_func doit
;
3178 type
= nlh
->nlmsg_type
;
3184 /* All the messages must have at least 1 byte length */
3185 if (nlmsg_len(nlh
) < sizeof(struct rtgenmsg
))
3188 family
= ((struct rtgenmsg
*)nlmsg_data(nlh
))->rtgen_family
;
3192 if (kind
!= 2 && !netlink_net_capable(skb
, CAP_NET_ADMIN
))
3195 if (kind
== 2 && nlh
->nlmsg_flags
&NLM_F_DUMP
) {
3197 rtnl_dumpit_func dumpit
;
3198 rtnl_calcit_func calcit
;
3199 u16 min_dump_alloc
= 0;
3201 dumpit
= rtnl_get_dumpit(family
, type
);
3204 calcit
= rtnl_get_calcit(family
, type
);
3206 min_dump_alloc
= calcit(skb
, nlh
);
3211 struct netlink_dump_control c
= {
3213 .min_dump_alloc
= min_dump_alloc
,
3215 err
= netlink_dump_start(rtnl
, skb
, nlh
, &c
);
3221 doit
= rtnl_get_doit(family
, type
);
3225 return doit(skb
, nlh
);
3228 static void rtnetlink_rcv(struct sk_buff
*skb
)
3231 netlink_rcv_skb(skb
, &rtnetlink_rcv_msg
);
3235 static int rtnetlink_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
3237 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
3243 case NETDEV_POST_INIT
:
3244 case NETDEV_REGISTER
:
3246 case NETDEV_PRE_TYPE_CHANGE
:
3247 case NETDEV_GOING_DOWN
:
3248 case NETDEV_UNREGISTER
:
3249 case NETDEV_UNREGISTER_FINAL
:
3250 case NETDEV_RELEASE
:
3252 case NETDEV_BONDING_INFO
:
3255 rtmsg_ifinfo(RTM_NEWLINK
, dev
, 0, GFP_KERNEL
);
3261 static struct notifier_block rtnetlink_dev_notifier
= {
3262 .notifier_call
= rtnetlink_event
,
3266 static int __net_init
rtnetlink_net_init(struct net
*net
)
3269 struct netlink_kernel_cfg cfg
= {
3270 .groups
= RTNLGRP_MAX
,
3271 .input
= rtnetlink_rcv
,
3272 .cb_mutex
= &rtnl_mutex
,
3273 .flags
= NL_CFG_F_NONROOT_RECV
,
3276 sk
= netlink_kernel_create(net
, NETLINK_ROUTE
, &cfg
);
3283 static void __net_exit
rtnetlink_net_exit(struct net
*net
)
3285 netlink_kernel_release(net
->rtnl
);
3289 static struct pernet_operations rtnetlink_net_ops
= {
3290 .init
= rtnetlink_net_init
,
3291 .exit
= rtnetlink_net_exit
,
3294 void __init
rtnetlink_init(void)
3296 if (register_pernet_subsys(&rtnetlink_net_ops
))
3297 panic("rtnetlink_init: cannot initialize rtnetlink\n");
3299 register_netdevice_notifier(&rtnetlink_dev_notifier
);
3301 rtnl_register(PF_UNSPEC
, RTM_GETLINK
, rtnl_getlink
,
3302 rtnl_dump_ifinfo
, rtnl_calcit
);
3303 rtnl_register(PF_UNSPEC
, RTM_SETLINK
, rtnl_setlink
, NULL
, NULL
);
3304 rtnl_register(PF_UNSPEC
, RTM_NEWLINK
, rtnl_newlink
, NULL
, NULL
);
3305 rtnl_register(PF_UNSPEC
, RTM_DELLINK
, rtnl_dellink
, NULL
, NULL
);
3307 rtnl_register(PF_UNSPEC
, RTM_GETADDR
, NULL
, rtnl_dump_all
, NULL
);
3308 rtnl_register(PF_UNSPEC
, RTM_GETROUTE
, NULL
, rtnl_dump_all
, NULL
);
3310 rtnl_register(PF_BRIDGE
, RTM_NEWNEIGH
, rtnl_fdb_add
, NULL
, NULL
);
3311 rtnl_register(PF_BRIDGE
, RTM_DELNEIGH
, rtnl_fdb_del
, NULL
, NULL
);
3312 rtnl_register(PF_BRIDGE
, RTM_GETNEIGH
, NULL
, rtnl_fdb_dump
, NULL
);
3314 rtnl_register(PF_BRIDGE
, RTM_GETLINK
, NULL
, rtnl_bridge_getlink
, NULL
);
3315 rtnl_register(PF_BRIDGE
, RTM_DELLINK
, rtnl_bridge_dellink
, NULL
, NULL
);
3316 rtnl_register(PF_BRIDGE
, RTM_SETLINK
, rtnl_bridge_setlink
, NULL
, NULL
);