2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Routing netlink socket interface: protocol independent part.
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
19 #include <linux/errno.h>
20 #include <linux/module.h>
21 #include <linux/types.h>
22 #include <linux/socket.h>
23 #include <linux/kernel.h>
24 #include <linux/timer.h>
25 #include <linux/string.h>
26 #include <linux/sockios.h>
27 #include <linux/net.h>
28 #include <linux/fcntl.h>
30 #include <linux/slab.h>
31 #include <linux/interrupt.h>
32 #include <linux/capability.h>
33 #include <linux/skbuff.h>
34 #include <linux/init.h>
35 #include <linux/security.h>
36 #include <linux/mutex.h>
37 #include <linux/if_addr.h>
38 #include <linux/if_bridge.h>
39 #include <linux/pci.h>
40 #include <linux/etherdevice.h>
42 #include <asm/uaccess.h>
44 #include <linux/inet.h>
45 #include <linux/netdevice.h>
47 #include <net/protocol.h>
49 #include <net/route.h>
52 #include <net/pkt_sched.h>
53 #include <net/fib_rules.h>
54 #include <net/rtnetlink.h>
55 #include <net/net_namespace.h>
59 rtnl_dumpit_func dumpit
;
60 rtnl_calcit_func calcit
;
63 static DEFINE_MUTEX(rtnl_mutex
);
67 mutex_lock(&rtnl_mutex
);
69 EXPORT_SYMBOL(rtnl_lock
);
71 void __rtnl_unlock(void)
73 mutex_unlock(&rtnl_mutex
);
76 void rtnl_unlock(void)
78 /* This fellow will unlock it for us. */
81 EXPORT_SYMBOL(rtnl_unlock
);
83 int rtnl_trylock(void)
85 return mutex_trylock(&rtnl_mutex
);
87 EXPORT_SYMBOL(rtnl_trylock
);
89 int rtnl_is_locked(void)
91 return mutex_is_locked(&rtnl_mutex
);
93 EXPORT_SYMBOL(rtnl_is_locked
);
95 #ifdef CONFIG_PROVE_LOCKING
96 int lockdep_rtnl_is_held(void)
98 return lockdep_is_held(&rtnl_mutex
);
100 EXPORT_SYMBOL(lockdep_rtnl_is_held
);
101 #endif /* #ifdef CONFIG_PROVE_LOCKING */
103 static struct rtnl_link
*rtnl_msg_handlers
[RTNL_FAMILY_MAX
+ 1];
105 static inline int rtm_msgindex(int msgtype
)
107 int msgindex
= msgtype
- RTM_BASE
;
110 * msgindex < 0 implies someone tried to register a netlink
111 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
112 * the message type has not been added to linux/rtnetlink.h
114 BUG_ON(msgindex
< 0 || msgindex
>= RTM_NR_MSGTYPES
);
119 static rtnl_doit_func
rtnl_get_doit(int protocol
, int msgindex
)
121 struct rtnl_link
*tab
;
123 if (protocol
<= RTNL_FAMILY_MAX
)
124 tab
= rtnl_msg_handlers
[protocol
];
128 if (tab
== NULL
|| tab
[msgindex
].doit
== NULL
)
129 tab
= rtnl_msg_handlers
[PF_UNSPEC
];
131 return tab
[msgindex
].doit
;
134 static rtnl_dumpit_func
rtnl_get_dumpit(int protocol
, int msgindex
)
136 struct rtnl_link
*tab
;
138 if (protocol
<= RTNL_FAMILY_MAX
)
139 tab
= rtnl_msg_handlers
[protocol
];
143 if (tab
== NULL
|| tab
[msgindex
].dumpit
== NULL
)
144 tab
= rtnl_msg_handlers
[PF_UNSPEC
];
146 return tab
[msgindex
].dumpit
;
149 static rtnl_calcit_func
rtnl_get_calcit(int protocol
, int msgindex
)
151 struct rtnl_link
*tab
;
153 if (protocol
<= RTNL_FAMILY_MAX
)
154 tab
= rtnl_msg_handlers
[protocol
];
158 if (tab
== NULL
|| tab
[msgindex
].calcit
== NULL
)
159 tab
= rtnl_msg_handlers
[PF_UNSPEC
];
161 return tab
[msgindex
].calcit
;
165 * __rtnl_register - Register a rtnetlink message type
166 * @protocol: Protocol family or PF_UNSPEC
167 * @msgtype: rtnetlink message type
168 * @doit: Function pointer called for each request message
169 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
170 * @calcit: Function pointer to calc size of dump message
172 * Registers the specified function pointers (at least one of them has
173 * to be non-NULL) to be called whenever a request message for the
174 * specified protocol family and message type is received.
176 * The special protocol family PF_UNSPEC may be used to define fallback
177 * function pointers for the case when no entry for the specific protocol
180 * Returns 0 on success or a negative error code.
182 int __rtnl_register(int protocol
, int msgtype
,
183 rtnl_doit_func doit
, rtnl_dumpit_func dumpit
,
184 rtnl_calcit_func calcit
)
186 struct rtnl_link
*tab
;
189 BUG_ON(protocol
< 0 || protocol
> RTNL_FAMILY_MAX
);
190 msgindex
= rtm_msgindex(msgtype
);
192 tab
= rtnl_msg_handlers
[protocol
];
194 tab
= kcalloc(RTM_NR_MSGTYPES
, sizeof(*tab
), GFP_KERNEL
);
198 rtnl_msg_handlers
[protocol
] = tab
;
202 tab
[msgindex
].doit
= doit
;
205 tab
[msgindex
].dumpit
= dumpit
;
208 tab
[msgindex
].calcit
= calcit
;
212 EXPORT_SYMBOL_GPL(__rtnl_register
);
215 * rtnl_register - Register a rtnetlink message type
217 * Identical to __rtnl_register() but panics on failure. This is useful
218 * as failure of this function is very unlikely, it can only happen due
219 * to lack of memory when allocating the chain to store all message
220 * handlers for a protocol. Meant for use in init functions where lack
221 * of memory implies no sense in continuing.
223 void rtnl_register(int protocol
, int msgtype
,
224 rtnl_doit_func doit
, rtnl_dumpit_func dumpit
,
225 rtnl_calcit_func calcit
)
227 if (__rtnl_register(protocol
, msgtype
, doit
, dumpit
, calcit
) < 0)
228 panic("Unable to register rtnetlink message handler, "
229 "protocol = %d, message type = %d\n",
232 EXPORT_SYMBOL_GPL(rtnl_register
);
235 * rtnl_unregister - Unregister a rtnetlink message type
236 * @protocol: Protocol family or PF_UNSPEC
237 * @msgtype: rtnetlink message type
239 * Returns 0 on success or a negative error code.
241 int rtnl_unregister(int protocol
, int msgtype
)
245 BUG_ON(protocol
< 0 || protocol
> RTNL_FAMILY_MAX
);
246 msgindex
= rtm_msgindex(msgtype
);
248 if (rtnl_msg_handlers
[protocol
] == NULL
)
251 rtnl_msg_handlers
[protocol
][msgindex
].doit
= NULL
;
252 rtnl_msg_handlers
[protocol
][msgindex
].dumpit
= NULL
;
256 EXPORT_SYMBOL_GPL(rtnl_unregister
);
259 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
260 * @protocol : Protocol family or PF_UNSPEC
262 * Identical to calling rtnl_unregster() for all registered message types
263 * of a certain protocol family.
265 void rtnl_unregister_all(int protocol
)
267 BUG_ON(protocol
< 0 || protocol
> RTNL_FAMILY_MAX
);
269 kfree(rtnl_msg_handlers
[protocol
]);
270 rtnl_msg_handlers
[protocol
] = NULL
;
272 EXPORT_SYMBOL_GPL(rtnl_unregister_all
);
274 static LIST_HEAD(link_ops
);
276 static const struct rtnl_link_ops
*rtnl_link_ops_get(const char *kind
)
278 const struct rtnl_link_ops
*ops
;
280 list_for_each_entry(ops
, &link_ops
, list
) {
281 if (!strcmp(ops
->kind
, kind
))
288 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
289 * @ops: struct rtnl_link_ops * to register
291 * The caller must hold the rtnl_mutex. This function should be used
292 * by drivers that create devices during module initialization. It
293 * must be called before registering the devices.
295 * Returns 0 on success or a negative error code.
297 int __rtnl_link_register(struct rtnl_link_ops
*ops
)
299 if (rtnl_link_ops_get(ops
->kind
))
303 ops
->dellink
= unregister_netdevice_queue
;
305 list_add_tail(&ops
->list
, &link_ops
);
308 EXPORT_SYMBOL_GPL(__rtnl_link_register
);
311 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
312 * @ops: struct rtnl_link_ops * to register
314 * Returns 0 on success or a negative error code.
316 int rtnl_link_register(struct rtnl_link_ops
*ops
)
321 err
= __rtnl_link_register(ops
);
325 EXPORT_SYMBOL_GPL(rtnl_link_register
);
327 static void __rtnl_kill_links(struct net
*net
, struct rtnl_link_ops
*ops
)
329 struct net_device
*dev
;
330 LIST_HEAD(list_kill
);
332 for_each_netdev(net
, dev
) {
333 if (dev
->rtnl_link_ops
== ops
)
334 ops
->dellink(dev
, &list_kill
);
336 unregister_netdevice_many(&list_kill
);
340 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
341 * @ops: struct rtnl_link_ops * to unregister
343 * The caller must hold the rtnl_mutex.
345 void __rtnl_link_unregister(struct rtnl_link_ops
*ops
)
350 __rtnl_kill_links(net
, ops
);
352 list_del(&ops
->list
);
354 EXPORT_SYMBOL_GPL(__rtnl_link_unregister
);
357 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
358 * @ops: struct rtnl_link_ops * to unregister
360 void rtnl_link_unregister(struct rtnl_link_ops
*ops
)
363 __rtnl_link_unregister(ops
);
366 EXPORT_SYMBOL_GPL(rtnl_link_unregister
);
368 static size_t rtnl_link_get_size(const struct net_device
*dev
)
370 const struct rtnl_link_ops
*ops
= dev
->rtnl_link_ops
;
376 size
= nla_total_size(sizeof(struct nlattr
)) + /* IFLA_LINKINFO */
377 nla_total_size(strlen(ops
->kind
) + 1); /* IFLA_INFO_KIND */
380 /* IFLA_INFO_DATA + nested data */
381 size
+= nla_total_size(sizeof(struct nlattr
)) +
384 if (ops
->get_xstats_size
)
385 /* IFLA_INFO_XSTATS */
386 size
+= nla_total_size(ops
->get_xstats_size(dev
));
391 static LIST_HEAD(rtnl_af_ops
);
393 static const struct rtnl_af_ops
*rtnl_af_lookup(const int family
)
395 const struct rtnl_af_ops
*ops
;
397 list_for_each_entry(ops
, &rtnl_af_ops
, list
) {
398 if (ops
->family
== family
)
406 * __rtnl_af_register - Register rtnl_af_ops with rtnetlink.
407 * @ops: struct rtnl_af_ops * to register
409 * The caller must hold the rtnl_mutex.
411 * Returns 0 on success or a negative error code.
413 int __rtnl_af_register(struct rtnl_af_ops
*ops
)
415 list_add_tail(&ops
->list
, &rtnl_af_ops
);
418 EXPORT_SYMBOL_GPL(__rtnl_af_register
);
421 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
422 * @ops: struct rtnl_af_ops * to register
424 * Returns 0 on success or a negative error code.
426 int rtnl_af_register(struct rtnl_af_ops
*ops
)
431 err
= __rtnl_af_register(ops
);
435 EXPORT_SYMBOL_GPL(rtnl_af_register
);
438 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
439 * @ops: struct rtnl_af_ops * to unregister
441 * The caller must hold the rtnl_mutex.
443 void __rtnl_af_unregister(struct rtnl_af_ops
*ops
)
445 list_del(&ops
->list
);
447 EXPORT_SYMBOL_GPL(__rtnl_af_unregister
);
450 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
451 * @ops: struct rtnl_af_ops * to unregister
453 void rtnl_af_unregister(struct rtnl_af_ops
*ops
)
456 __rtnl_af_unregister(ops
);
459 EXPORT_SYMBOL_GPL(rtnl_af_unregister
);
461 static size_t rtnl_link_get_af_size(const struct net_device
*dev
)
463 struct rtnl_af_ops
*af_ops
;
467 size
= nla_total_size(sizeof(struct nlattr
));
469 list_for_each_entry(af_ops
, &rtnl_af_ops
, list
) {
470 if (af_ops
->get_link_af_size
) {
471 /* AF_* + nested data */
472 size
+= nla_total_size(sizeof(struct nlattr
)) +
473 af_ops
->get_link_af_size(dev
);
480 static int rtnl_link_fill(struct sk_buff
*skb
, const struct net_device
*dev
)
482 const struct rtnl_link_ops
*ops
= dev
->rtnl_link_ops
;
483 struct nlattr
*linkinfo
, *data
;
486 linkinfo
= nla_nest_start(skb
, IFLA_LINKINFO
);
487 if (linkinfo
== NULL
)
490 if (nla_put_string(skb
, IFLA_INFO_KIND
, ops
->kind
) < 0)
491 goto err_cancel_link
;
492 if (ops
->fill_xstats
) {
493 err
= ops
->fill_xstats(skb
, dev
);
495 goto err_cancel_link
;
497 if (ops
->fill_info
) {
498 data
= nla_nest_start(skb
, IFLA_INFO_DATA
);
501 goto err_cancel_link
;
503 err
= ops
->fill_info(skb
, dev
);
505 goto err_cancel_data
;
506 nla_nest_end(skb
, data
);
509 nla_nest_end(skb
, linkinfo
);
513 nla_nest_cancel(skb
, data
);
515 nla_nest_cancel(skb
, linkinfo
);
520 int rtnetlink_send(struct sk_buff
*skb
, struct net
*net
, u32 pid
, unsigned int group
, int echo
)
522 struct sock
*rtnl
= net
->rtnl
;
525 NETLINK_CB(skb
).dst_group
= group
;
527 atomic_inc(&skb
->users
);
528 netlink_broadcast(rtnl
, skb
, pid
, group
, GFP_KERNEL
);
530 err
= netlink_unicast(rtnl
, skb
, pid
, MSG_DONTWAIT
);
534 int rtnl_unicast(struct sk_buff
*skb
, struct net
*net
, u32 pid
)
536 struct sock
*rtnl
= net
->rtnl
;
538 return nlmsg_unicast(rtnl
, skb
, pid
);
540 EXPORT_SYMBOL(rtnl_unicast
);
542 void rtnl_notify(struct sk_buff
*skb
, struct net
*net
, u32 pid
, u32 group
,
543 struct nlmsghdr
*nlh
, gfp_t flags
)
545 struct sock
*rtnl
= net
->rtnl
;
549 report
= nlmsg_report(nlh
);
551 nlmsg_notify(rtnl
, skb
, pid
, group
, report
, flags
);
553 EXPORT_SYMBOL(rtnl_notify
);
555 void rtnl_set_sk_err(struct net
*net
, u32 group
, int error
)
557 struct sock
*rtnl
= net
->rtnl
;
559 netlink_set_err(rtnl
, 0, group
, error
);
561 EXPORT_SYMBOL(rtnl_set_sk_err
);
563 int rtnetlink_put_metrics(struct sk_buff
*skb
, u32
*metrics
)
568 mx
= nla_nest_start(skb
, RTA_METRICS
);
572 for (i
= 0; i
< RTAX_MAX
; i
++) {
575 if (nla_put_u32(skb
, i
+1, metrics
[i
]))
576 goto nla_put_failure
;
581 nla_nest_cancel(skb
, mx
);
585 return nla_nest_end(skb
, mx
);
588 nla_nest_cancel(skb
, mx
);
591 EXPORT_SYMBOL(rtnetlink_put_metrics
);
593 int rtnl_put_cacheinfo(struct sk_buff
*skb
, struct dst_entry
*dst
, u32 id
,
594 long expires
, u32 error
)
596 struct rta_cacheinfo ci
= {
597 .rta_lastuse
= jiffies_delta_to_clock_t(jiffies
- dst
->lastuse
),
598 .rta_used
= dst
->__use
,
599 .rta_clntref
= atomic_read(&(dst
->__refcnt
)),
607 clock
= jiffies_to_clock_t(abs(expires
));
608 clock
= min_t(unsigned long, clock
, INT_MAX
);
609 ci
.rta_expires
= (expires
> 0) ? clock
: -clock
;
611 return nla_put(skb
, RTA_CACHEINFO
, sizeof(ci
), &ci
);
613 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo
);
615 static void set_operstate(struct net_device
*dev
, unsigned char transition
)
617 unsigned char operstate
= dev
->operstate
;
619 switch (transition
) {
621 if ((operstate
== IF_OPER_DORMANT
||
622 operstate
== IF_OPER_UNKNOWN
) &&
624 operstate
= IF_OPER_UP
;
627 case IF_OPER_DORMANT
:
628 if (operstate
== IF_OPER_UP
||
629 operstate
== IF_OPER_UNKNOWN
)
630 operstate
= IF_OPER_DORMANT
;
634 if (dev
->operstate
!= operstate
) {
635 write_lock_bh(&dev_base_lock
);
636 dev
->operstate
= operstate
;
637 write_unlock_bh(&dev_base_lock
);
638 netdev_state_change(dev
);
642 static unsigned int rtnl_dev_get_flags(const struct net_device
*dev
)
644 return (dev
->flags
& ~(IFF_PROMISC
| IFF_ALLMULTI
)) |
645 (dev
->gflags
& (IFF_PROMISC
| IFF_ALLMULTI
));
648 static unsigned int rtnl_dev_combine_flags(const struct net_device
*dev
,
649 const struct ifinfomsg
*ifm
)
651 unsigned int flags
= ifm
->ifi_flags
;
653 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
655 flags
= (flags
& ifm
->ifi_change
) |
656 (rtnl_dev_get_flags(dev
) & ~ifm
->ifi_change
);
661 static void copy_rtnl_link_stats(struct rtnl_link_stats
*a
,
662 const struct rtnl_link_stats64
*b
)
664 a
->rx_packets
= b
->rx_packets
;
665 a
->tx_packets
= b
->tx_packets
;
666 a
->rx_bytes
= b
->rx_bytes
;
667 a
->tx_bytes
= b
->tx_bytes
;
668 a
->rx_errors
= b
->rx_errors
;
669 a
->tx_errors
= b
->tx_errors
;
670 a
->rx_dropped
= b
->rx_dropped
;
671 a
->tx_dropped
= b
->tx_dropped
;
673 a
->multicast
= b
->multicast
;
674 a
->collisions
= b
->collisions
;
676 a
->rx_length_errors
= b
->rx_length_errors
;
677 a
->rx_over_errors
= b
->rx_over_errors
;
678 a
->rx_crc_errors
= b
->rx_crc_errors
;
679 a
->rx_frame_errors
= b
->rx_frame_errors
;
680 a
->rx_fifo_errors
= b
->rx_fifo_errors
;
681 a
->rx_missed_errors
= b
->rx_missed_errors
;
683 a
->tx_aborted_errors
= b
->tx_aborted_errors
;
684 a
->tx_carrier_errors
= b
->tx_carrier_errors
;
685 a
->tx_fifo_errors
= b
->tx_fifo_errors
;
686 a
->tx_heartbeat_errors
= b
->tx_heartbeat_errors
;
687 a
->tx_window_errors
= b
->tx_window_errors
;
689 a
->rx_compressed
= b
->rx_compressed
;
690 a
->tx_compressed
= b
->tx_compressed
;
693 static void copy_rtnl_link_stats64(void *v
, const struct rtnl_link_stats64
*b
)
695 memcpy(v
, b
, sizeof(*b
));
699 static inline int rtnl_vfinfo_size(const struct net_device
*dev
,
702 if (dev
->dev
.parent
&& dev_is_pci(dev
->dev
.parent
) &&
703 (ext_filter_mask
& RTEXT_FILTER_VF
)) {
704 int num_vfs
= dev_num_vf(dev
->dev
.parent
);
705 size_t size
= nla_total_size(sizeof(struct nlattr
));
706 size
+= nla_total_size(num_vfs
* sizeof(struct nlattr
));
708 (nla_total_size(sizeof(struct ifla_vf_mac
)) +
709 nla_total_size(sizeof(struct ifla_vf_vlan
)) +
710 nla_total_size(sizeof(struct ifla_vf_tx_rate
)) +
711 nla_total_size(sizeof(struct ifla_vf_spoofchk
)));
717 static size_t rtnl_port_size(const struct net_device
*dev
)
719 size_t port_size
= nla_total_size(4) /* PORT_VF */
720 + nla_total_size(PORT_PROFILE_MAX
) /* PORT_PROFILE */
721 + nla_total_size(sizeof(struct ifla_port_vsi
))
723 + nla_total_size(PORT_UUID_MAX
) /* PORT_INSTANCE_UUID */
724 + nla_total_size(PORT_UUID_MAX
) /* PORT_HOST_UUID */
725 + nla_total_size(1) /* PROT_VDP_REQUEST */
726 + nla_total_size(2); /* PORT_VDP_RESPONSE */
727 size_t vf_ports_size
= nla_total_size(sizeof(struct nlattr
));
728 size_t vf_port_size
= nla_total_size(sizeof(struct nlattr
))
730 size_t port_self_size
= nla_total_size(sizeof(struct nlattr
))
733 if (!dev
->netdev_ops
->ndo_get_vf_port
|| !dev
->dev
.parent
)
735 if (dev_num_vf(dev
->dev
.parent
))
736 return port_self_size
+ vf_ports_size
+
737 vf_port_size
* dev_num_vf(dev
->dev
.parent
);
739 return port_self_size
;
742 static noinline
size_t if_nlmsg_size(const struct net_device
*dev
,
745 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
746 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
747 + nla_total_size(IFALIASZ
) /* IFLA_IFALIAS */
748 + nla_total_size(IFNAMSIZ
) /* IFLA_QDISC */
749 + nla_total_size(sizeof(struct rtnl_link_ifmap
))
750 + nla_total_size(sizeof(struct rtnl_link_stats
))
751 + nla_total_size(sizeof(struct rtnl_link_stats64
))
752 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
753 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_BROADCAST */
754 + nla_total_size(4) /* IFLA_TXQLEN */
755 + nla_total_size(4) /* IFLA_WEIGHT */
756 + nla_total_size(4) /* IFLA_MTU */
757 + nla_total_size(4) /* IFLA_LINK */
758 + nla_total_size(4) /* IFLA_MASTER */
759 + nla_total_size(1) /* IFLA_CARRIER */
760 + nla_total_size(4) /* IFLA_PROMISCUITY */
761 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
762 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
763 + nla_total_size(1) /* IFLA_OPERSTATE */
764 + nla_total_size(1) /* IFLA_LINKMODE */
765 + nla_total_size(ext_filter_mask
766 & RTEXT_FILTER_VF
? 4 : 0) /* IFLA_NUM_VF */
767 + rtnl_vfinfo_size(dev
, ext_filter_mask
) /* IFLA_VFINFO_LIST */
768 + rtnl_port_size(dev
) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
769 + rtnl_link_get_size(dev
) /* IFLA_LINKINFO */
770 + rtnl_link_get_af_size(dev
); /* IFLA_AF_SPEC */
773 static int rtnl_vf_ports_fill(struct sk_buff
*skb
, struct net_device
*dev
)
775 struct nlattr
*vf_ports
;
776 struct nlattr
*vf_port
;
780 vf_ports
= nla_nest_start(skb
, IFLA_VF_PORTS
);
784 for (vf
= 0; vf
< dev_num_vf(dev
->dev
.parent
); vf
++) {
785 vf_port
= nla_nest_start(skb
, IFLA_VF_PORT
);
787 goto nla_put_failure
;
788 if (nla_put_u32(skb
, IFLA_PORT_VF
, vf
))
789 goto nla_put_failure
;
790 err
= dev
->netdev_ops
->ndo_get_vf_port(dev
, vf
, skb
);
791 if (err
== -EMSGSIZE
)
792 goto nla_put_failure
;
794 nla_nest_cancel(skb
, vf_port
);
797 nla_nest_end(skb
, vf_port
);
800 nla_nest_end(skb
, vf_ports
);
805 nla_nest_cancel(skb
, vf_ports
);
809 static int rtnl_port_self_fill(struct sk_buff
*skb
, struct net_device
*dev
)
811 struct nlattr
*port_self
;
814 port_self
= nla_nest_start(skb
, IFLA_PORT_SELF
);
818 err
= dev
->netdev_ops
->ndo_get_vf_port(dev
, PORT_SELF_VF
, skb
);
820 nla_nest_cancel(skb
, port_self
);
821 return (err
== -EMSGSIZE
) ? err
: 0;
824 nla_nest_end(skb
, port_self
);
829 static int rtnl_port_fill(struct sk_buff
*skb
, struct net_device
*dev
)
833 if (!dev
->netdev_ops
->ndo_get_vf_port
|| !dev
->dev
.parent
)
836 err
= rtnl_port_self_fill(skb
, dev
);
840 if (dev_num_vf(dev
->dev
.parent
)) {
841 err
= rtnl_vf_ports_fill(skb
, dev
);
849 static int rtnl_fill_ifinfo(struct sk_buff
*skb
, struct net_device
*dev
,
850 int type
, u32 pid
, u32 seq
, u32 change
,
851 unsigned int flags
, u32 ext_filter_mask
)
853 struct ifinfomsg
*ifm
;
854 struct nlmsghdr
*nlh
;
855 struct rtnl_link_stats64 temp
;
856 const struct rtnl_link_stats64
*stats
;
857 struct nlattr
*attr
, *af_spec
;
858 struct rtnl_af_ops
*af_ops
;
859 struct net_device
*upper_dev
= netdev_master_upper_dev_get(dev
);
862 nlh
= nlmsg_put(skb
, pid
, seq
, type
, sizeof(*ifm
), flags
);
866 ifm
= nlmsg_data(nlh
);
867 ifm
->ifi_family
= AF_UNSPEC
;
869 ifm
->ifi_type
= dev
->type
;
870 ifm
->ifi_index
= dev
->ifindex
;
871 ifm
->ifi_flags
= dev_get_flags(dev
);
872 ifm
->ifi_change
= change
;
874 if (nla_put_string(skb
, IFLA_IFNAME
, dev
->name
) ||
875 nla_put_u32(skb
, IFLA_TXQLEN
, dev
->tx_queue_len
) ||
876 nla_put_u8(skb
, IFLA_OPERSTATE
,
877 netif_running(dev
) ? dev
->operstate
: IF_OPER_DOWN
) ||
878 nla_put_u8(skb
, IFLA_LINKMODE
, dev
->link_mode
) ||
879 nla_put_u32(skb
, IFLA_MTU
, dev
->mtu
) ||
880 nla_put_u32(skb
, IFLA_GROUP
, dev
->group
) ||
881 nla_put_u32(skb
, IFLA_PROMISCUITY
, dev
->promiscuity
) ||
882 nla_put_u32(skb
, IFLA_NUM_TX_QUEUES
, dev
->num_tx_queues
) ||
884 nla_put_u32(skb
, IFLA_NUM_RX_QUEUES
, dev
->num_rx_queues
) ||
886 (dev
->ifindex
!= dev
->iflink
&&
887 nla_put_u32(skb
, IFLA_LINK
, dev
->iflink
)) ||
889 nla_put_u32(skb
, IFLA_MASTER
, upper_dev
->ifindex
)) ||
890 nla_put_u8(skb
, IFLA_CARRIER
, netif_carrier_ok(dev
)) ||
892 nla_put_string(skb
, IFLA_QDISC
, dev
->qdisc
->ops
->id
)) ||
894 nla_put_string(skb
, IFLA_IFALIAS
, dev
->ifalias
)))
895 goto nla_put_failure
;
898 struct rtnl_link_ifmap map
= {
899 .mem_start
= dev
->mem_start
,
900 .mem_end
= dev
->mem_end
,
901 .base_addr
= dev
->base_addr
,
904 .port
= dev
->if_port
,
906 if (nla_put(skb
, IFLA_MAP
, sizeof(map
), &map
))
907 goto nla_put_failure
;
911 if (nla_put(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
) ||
912 nla_put(skb
, IFLA_BROADCAST
, dev
->addr_len
, dev
->broadcast
))
913 goto nla_put_failure
;
916 attr
= nla_reserve(skb
, IFLA_STATS
,
917 sizeof(struct rtnl_link_stats
));
919 goto nla_put_failure
;
921 stats
= dev_get_stats(dev
, &temp
);
922 copy_rtnl_link_stats(nla_data(attr
), stats
);
924 attr
= nla_reserve(skb
, IFLA_STATS64
,
925 sizeof(struct rtnl_link_stats64
));
927 goto nla_put_failure
;
928 copy_rtnl_link_stats64(nla_data(attr
), stats
);
930 if (dev
->dev
.parent
&& (ext_filter_mask
& RTEXT_FILTER_VF
) &&
931 nla_put_u32(skb
, IFLA_NUM_VF
, dev_num_vf(dev
->dev
.parent
)))
932 goto nla_put_failure
;
934 if (dev
->netdev_ops
->ndo_get_vf_config
&& dev
->dev
.parent
935 && (ext_filter_mask
& RTEXT_FILTER_VF
)) {
938 struct nlattr
*vfinfo
, *vf
;
939 int num_vfs
= dev_num_vf(dev
->dev
.parent
);
941 vfinfo
= nla_nest_start(skb
, IFLA_VFINFO_LIST
);
943 goto nla_put_failure
;
944 for (i
= 0; i
< num_vfs
; i
++) {
945 struct ifla_vf_info ivi
;
946 struct ifla_vf_mac vf_mac
;
947 struct ifla_vf_vlan vf_vlan
;
948 struct ifla_vf_tx_rate vf_tx_rate
;
949 struct ifla_vf_spoofchk vf_spoofchk
;
952 * Not all SR-IOV capable drivers support the
953 * spoofcheck query. Preset to -1 so the user
954 * space tool can detect that the driver didn't
958 memset(ivi
.mac
, 0, sizeof(ivi
.mac
));
959 if (dev
->netdev_ops
->ndo_get_vf_config(dev
, i
, &ivi
))
964 vf_spoofchk
.vf
= ivi
.vf
;
966 memcpy(vf_mac
.mac
, ivi
.mac
, sizeof(ivi
.mac
));
967 vf_vlan
.vlan
= ivi
.vlan
;
968 vf_vlan
.qos
= ivi
.qos
;
969 vf_tx_rate
.rate
= ivi
.tx_rate
;
970 vf_spoofchk
.setting
= ivi
.spoofchk
;
971 vf
= nla_nest_start(skb
, IFLA_VF_INFO
);
973 nla_nest_cancel(skb
, vfinfo
);
974 goto nla_put_failure
;
976 if (nla_put(skb
, IFLA_VF_MAC
, sizeof(vf_mac
), &vf_mac
) ||
977 nla_put(skb
, IFLA_VF_VLAN
, sizeof(vf_vlan
), &vf_vlan
) ||
978 nla_put(skb
, IFLA_VF_TX_RATE
, sizeof(vf_tx_rate
),
980 nla_put(skb
, IFLA_VF_SPOOFCHK
, sizeof(vf_spoofchk
),
982 goto nla_put_failure
;
983 nla_nest_end(skb
, vf
);
985 nla_nest_end(skb
, vfinfo
);
988 if (rtnl_port_fill(skb
, dev
))
989 goto nla_put_failure
;
991 if (dev
->rtnl_link_ops
) {
992 if (rtnl_link_fill(skb
, dev
) < 0)
993 goto nla_put_failure
;
996 if (!(af_spec
= nla_nest_start(skb
, IFLA_AF_SPEC
)))
997 goto nla_put_failure
;
999 list_for_each_entry(af_ops
, &rtnl_af_ops
, list
) {
1000 if (af_ops
->fill_link_af
) {
1004 if (!(af
= nla_nest_start(skb
, af_ops
->family
)))
1005 goto nla_put_failure
;
1007 err
= af_ops
->fill_link_af(skb
, dev
);
1010 * Caller may return ENODATA to indicate that there
1011 * was no data to be dumped. This is not an error, it
1012 * means we should trim the attribute header and
1015 if (err
== -ENODATA
)
1016 nla_nest_cancel(skb
, af
);
1018 goto nla_put_failure
;
1020 nla_nest_end(skb
, af
);
1024 nla_nest_end(skb
, af_spec
);
1026 return nlmsg_end(skb
, nlh
);
1029 nlmsg_cancel(skb
, nlh
);
1033 static int rtnl_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1035 struct net
*net
= sock_net(skb
->sk
);
1038 struct net_device
*dev
;
1039 struct hlist_head
*head
;
1040 struct nlattr
*tb
[IFLA_MAX
+1];
1041 u32 ext_filter_mask
= 0;
1044 s_idx
= cb
->args
[1];
1047 cb
->seq
= net
->dev_base_seq
;
1049 if (nlmsg_parse(cb
->nlh
, sizeof(struct ifinfomsg
), tb
, IFLA_MAX
,
1050 ifla_policy
) >= 0) {
1052 if (tb
[IFLA_EXT_MASK
])
1053 ext_filter_mask
= nla_get_u32(tb
[IFLA_EXT_MASK
]);
1056 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
1058 head
= &net
->dev_index_head
[h
];
1059 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
1062 if (rtnl_fill_ifinfo(skb
, dev
, RTM_NEWLINK
,
1063 NETLINK_CB(cb
->skb
).portid
,
1064 cb
->nlh
->nlmsg_seq
, 0,
1066 ext_filter_mask
) <= 0)
1069 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
1082 const struct nla_policy ifla_policy
[IFLA_MAX
+1] = {
1083 [IFLA_IFNAME
] = { .type
= NLA_STRING
, .len
= IFNAMSIZ
-1 },
1084 [IFLA_ADDRESS
] = { .type
= NLA_BINARY
, .len
= MAX_ADDR_LEN
},
1085 [IFLA_BROADCAST
] = { .type
= NLA_BINARY
, .len
= MAX_ADDR_LEN
},
1086 [IFLA_MAP
] = { .len
= sizeof(struct rtnl_link_ifmap
) },
1087 [IFLA_MTU
] = { .type
= NLA_U32
},
1088 [IFLA_LINK
] = { .type
= NLA_U32
},
1089 [IFLA_MASTER
] = { .type
= NLA_U32
},
1090 [IFLA_CARRIER
] = { .type
= NLA_U8
},
1091 [IFLA_TXQLEN
] = { .type
= NLA_U32
},
1092 [IFLA_WEIGHT
] = { .type
= NLA_U32
},
1093 [IFLA_OPERSTATE
] = { .type
= NLA_U8
},
1094 [IFLA_LINKMODE
] = { .type
= NLA_U8
},
1095 [IFLA_LINKINFO
] = { .type
= NLA_NESTED
},
1096 [IFLA_NET_NS_PID
] = { .type
= NLA_U32
},
1097 [IFLA_NET_NS_FD
] = { .type
= NLA_U32
},
1098 [IFLA_IFALIAS
] = { .type
= NLA_STRING
, .len
= IFALIASZ
-1 },
1099 [IFLA_VFINFO_LIST
] = {. type
= NLA_NESTED
},
1100 [IFLA_VF_PORTS
] = { .type
= NLA_NESTED
},
1101 [IFLA_PORT_SELF
] = { .type
= NLA_NESTED
},
1102 [IFLA_AF_SPEC
] = { .type
= NLA_NESTED
},
1103 [IFLA_EXT_MASK
] = { .type
= NLA_U32
},
1104 [IFLA_PROMISCUITY
] = { .type
= NLA_U32
},
1105 [IFLA_NUM_TX_QUEUES
] = { .type
= NLA_U32
},
1106 [IFLA_NUM_RX_QUEUES
] = { .type
= NLA_U32
},
1108 EXPORT_SYMBOL(ifla_policy
);
1110 static const struct nla_policy ifla_info_policy
[IFLA_INFO_MAX
+1] = {
1111 [IFLA_INFO_KIND
] = { .type
= NLA_STRING
},
1112 [IFLA_INFO_DATA
] = { .type
= NLA_NESTED
},
1115 static const struct nla_policy ifla_vfinfo_policy
[IFLA_VF_INFO_MAX
+1] = {
1116 [IFLA_VF_INFO
] = { .type
= NLA_NESTED
},
1119 static const struct nla_policy ifla_vf_policy
[IFLA_VF_MAX
+1] = {
1120 [IFLA_VF_MAC
] = { .type
= NLA_BINARY
,
1121 .len
= sizeof(struct ifla_vf_mac
) },
1122 [IFLA_VF_VLAN
] = { .type
= NLA_BINARY
,
1123 .len
= sizeof(struct ifla_vf_vlan
) },
1124 [IFLA_VF_TX_RATE
] = { .type
= NLA_BINARY
,
1125 .len
= sizeof(struct ifla_vf_tx_rate
) },
1126 [IFLA_VF_SPOOFCHK
] = { .type
= NLA_BINARY
,
1127 .len
= sizeof(struct ifla_vf_spoofchk
) },
1130 static const struct nla_policy ifla_port_policy
[IFLA_PORT_MAX
+1] = {
1131 [IFLA_PORT_VF
] = { .type
= NLA_U32
},
1132 [IFLA_PORT_PROFILE
] = { .type
= NLA_STRING
,
1133 .len
= PORT_PROFILE_MAX
},
1134 [IFLA_PORT_VSI_TYPE
] = { .type
= NLA_BINARY
,
1135 .len
= sizeof(struct ifla_port_vsi
)},
1136 [IFLA_PORT_INSTANCE_UUID
] = { .type
= NLA_BINARY
,
1137 .len
= PORT_UUID_MAX
},
1138 [IFLA_PORT_HOST_UUID
] = { .type
= NLA_STRING
,
1139 .len
= PORT_UUID_MAX
},
1140 [IFLA_PORT_REQUEST
] = { .type
= NLA_U8
, },
1141 [IFLA_PORT_RESPONSE
] = { .type
= NLA_U16
, },
1144 struct net
*rtnl_link_get_net(struct net
*src_net
, struct nlattr
*tb
[])
1147 /* Examine the link attributes and figure out which
1148 * network namespace we are talking about.
1150 if (tb
[IFLA_NET_NS_PID
])
1151 net
= get_net_ns_by_pid(nla_get_u32(tb
[IFLA_NET_NS_PID
]));
1152 else if (tb
[IFLA_NET_NS_FD
])
1153 net
= get_net_ns_by_fd(nla_get_u32(tb
[IFLA_NET_NS_FD
]));
1155 net
= get_net(src_net
);
1158 EXPORT_SYMBOL(rtnl_link_get_net
);
1160 static int validate_linkmsg(struct net_device
*dev
, struct nlattr
*tb
[])
1163 if (tb
[IFLA_ADDRESS
] &&
1164 nla_len(tb
[IFLA_ADDRESS
]) < dev
->addr_len
)
1167 if (tb
[IFLA_BROADCAST
] &&
1168 nla_len(tb
[IFLA_BROADCAST
]) < dev
->addr_len
)
1172 if (tb
[IFLA_AF_SPEC
]) {
1176 nla_for_each_nested(af
, tb
[IFLA_AF_SPEC
], rem
) {
1177 const struct rtnl_af_ops
*af_ops
;
1179 if (!(af_ops
= rtnl_af_lookup(nla_type(af
))))
1180 return -EAFNOSUPPORT
;
1182 if (!af_ops
->set_link_af
)
1185 if (af_ops
->validate_link_af
) {
1186 err
= af_ops
->validate_link_af(dev
, af
);
1196 static int do_setvfinfo(struct net_device
*dev
, struct nlattr
*attr
)
1198 int rem
, err
= -EINVAL
;
1200 const struct net_device_ops
*ops
= dev
->netdev_ops
;
1202 nla_for_each_nested(vf
, attr
, rem
) {
1203 switch (nla_type(vf
)) {
1205 struct ifla_vf_mac
*ivm
;
1208 if (ops
->ndo_set_vf_mac
)
1209 err
= ops
->ndo_set_vf_mac(dev
, ivm
->vf
,
1213 case IFLA_VF_VLAN
: {
1214 struct ifla_vf_vlan
*ivv
;
1217 if (ops
->ndo_set_vf_vlan
)
1218 err
= ops
->ndo_set_vf_vlan(dev
, ivv
->vf
,
1223 case IFLA_VF_TX_RATE
: {
1224 struct ifla_vf_tx_rate
*ivt
;
1227 if (ops
->ndo_set_vf_tx_rate
)
1228 err
= ops
->ndo_set_vf_tx_rate(dev
, ivt
->vf
,
1232 case IFLA_VF_SPOOFCHK
: {
1233 struct ifla_vf_spoofchk
*ivs
;
1236 if (ops
->ndo_set_vf_spoofchk
)
1237 err
= ops
->ndo_set_vf_spoofchk(dev
, ivs
->vf
,
1251 static int do_set_master(struct net_device
*dev
, int ifindex
)
1253 struct net_device
*upper_dev
= netdev_master_upper_dev_get(dev
);
1254 const struct net_device_ops
*ops
;
1258 if (upper_dev
->ifindex
== ifindex
)
1260 ops
= upper_dev
->netdev_ops
;
1261 if (ops
->ndo_del_slave
) {
1262 err
= ops
->ndo_del_slave(upper_dev
, dev
);
1271 upper_dev
= __dev_get_by_index(dev_net(dev
), ifindex
);
1274 ops
= upper_dev
->netdev_ops
;
1275 if (ops
->ndo_add_slave
) {
1276 err
= ops
->ndo_add_slave(upper_dev
, dev
);
1286 static int do_setlink(struct net_device
*dev
, struct ifinfomsg
*ifm
,
1287 struct nlattr
**tb
, char *ifname
, int modified
)
1289 const struct net_device_ops
*ops
= dev
->netdev_ops
;
1292 if (tb
[IFLA_NET_NS_PID
] || tb
[IFLA_NET_NS_FD
]) {
1293 struct net
*net
= rtnl_link_get_net(dev_net(dev
), tb
);
1298 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
)) {
1302 err
= dev_change_net_namespace(dev
, net
, ifname
);
1310 struct rtnl_link_ifmap
*u_map
;
1313 if (!ops
->ndo_set_config
) {
1318 if (!netif_device_present(dev
)) {
1323 u_map
= nla_data(tb
[IFLA_MAP
]);
1324 k_map
.mem_start
= (unsigned long) u_map
->mem_start
;
1325 k_map
.mem_end
= (unsigned long) u_map
->mem_end
;
1326 k_map
.base_addr
= (unsigned short) u_map
->base_addr
;
1327 k_map
.irq
= (unsigned char) u_map
->irq
;
1328 k_map
.dma
= (unsigned char) u_map
->dma
;
1329 k_map
.port
= (unsigned char) u_map
->port
;
1331 err
= ops
->ndo_set_config(dev
, &k_map
);
1338 if (tb
[IFLA_ADDRESS
]) {
1339 struct sockaddr
*sa
;
1342 len
= sizeof(sa_family_t
) + dev
->addr_len
;
1343 sa
= kmalloc(len
, GFP_KERNEL
);
1348 sa
->sa_family
= dev
->type
;
1349 memcpy(sa
->sa_data
, nla_data(tb
[IFLA_ADDRESS
]),
1351 err
= dev_set_mac_address(dev
, sa
);
1359 err
= dev_set_mtu(dev
, nla_get_u32(tb
[IFLA_MTU
]));
1365 if (tb
[IFLA_GROUP
]) {
1366 dev_set_group(dev
, nla_get_u32(tb
[IFLA_GROUP
]));
1371 * Interface selected by interface index but interface
1372 * name provided implies that a name change has been
1375 if (ifm
->ifi_index
> 0 && ifname
[0]) {
1376 err
= dev_change_name(dev
, ifname
);
1382 if (tb
[IFLA_IFALIAS
]) {
1383 err
= dev_set_alias(dev
, nla_data(tb
[IFLA_IFALIAS
]),
1384 nla_len(tb
[IFLA_IFALIAS
]));
1390 if (tb
[IFLA_BROADCAST
]) {
1391 nla_memcpy(dev
->broadcast
, tb
[IFLA_BROADCAST
], dev
->addr_len
);
1392 call_netdevice_notifiers(NETDEV_CHANGEADDR
, dev
);
1395 if (ifm
->ifi_flags
|| ifm
->ifi_change
) {
1396 err
= dev_change_flags(dev
, rtnl_dev_combine_flags(dev
, ifm
));
1401 if (tb
[IFLA_MASTER
]) {
1402 err
= do_set_master(dev
, nla_get_u32(tb
[IFLA_MASTER
]));
1408 if (tb
[IFLA_CARRIER
]) {
1409 err
= dev_change_carrier(dev
, nla_get_u8(tb
[IFLA_CARRIER
]));
1415 if (tb
[IFLA_TXQLEN
])
1416 dev
->tx_queue_len
= nla_get_u32(tb
[IFLA_TXQLEN
]);
1418 if (tb
[IFLA_OPERSTATE
])
1419 set_operstate(dev
, nla_get_u8(tb
[IFLA_OPERSTATE
]));
1421 if (tb
[IFLA_LINKMODE
]) {
1422 write_lock_bh(&dev_base_lock
);
1423 dev
->link_mode
= nla_get_u8(tb
[IFLA_LINKMODE
]);
1424 write_unlock_bh(&dev_base_lock
);
1427 if (tb
[IFLA_VFINFO_LIST
]) {
1428 struct nlattr
*attr
;
1430 nla_for_each_nested(attr
, tb
[IFLA_VFINFO_LIST
], rem
) {
1431 if (nla_type(attr
) != IFLA_VF_INFO
) {
1435 err
= do_setvfinfo(dev
, attr
);
1443 if (tb
[IFLA_VF_PORTS
]) {
1444 struct nlattr
*port
[IFLA_PORT_MAX
+1];
1445 struct nlattr
*attr
;
1450 if (!ops
->ndo_set_vf_port
)
1453 nla_for_each_nested(attr
, tb
[IFLA_VF_PORTS
], rem
) {
1454 if (nla_type(attr
) != IFLA_VF_PORT
)
1456 err
= nla_parse_nested(port
, IFLA_PORT_MAX
,
1457 attr
, ifla_port_policy
);
1460 if (!port
[IFLA_PORT_VF
]) {
1464 vf
= nla_get_u32(port
[IFLA_PORT_VF
]);
1465 err
= ops
->ndo_set_vf_port(dev
, vf
, port
);
1473 if (tb
[IFLA_PORT_SELF
]) {
1474 struct nlattr
*port
[IFLA_PORT_MAX
+1];
1476 err
= nla_parse_nested(port
, IFLA_PORT_MAX
,
1477 tb
[IFLA_PORT_SELF
], ifla_port_policy
);
1482 if (ops
->ndo_set_vf_port
)
1483 err
= ops
->ndo_set_vf_port(dev
, PORT_SELF_VF
, port
);
1489 if (tb
[IFLA_AF_SPEC
]) {
1493 nla_for_each_nested(af
, tb
[IFLA_AF_SPEC
], rem
) {
1494 const struct rtnl_af_ops
*af_ops
;
1496 if (!(af_ops
= rtnl_af_lookup(nla_type(af
))))
1499 err
= af_ops
->set_link_af(dev
, af
);
1509 if (err
< 0 && modified
)
1510 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",
1516 static int rtnl_setlink(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
1518 struct net
*net
= sock_net(skb
->sk
);
1519 struct ifinfomsg
*ifm
;
1520 struct net_device
*dev
;
1522 struct nlattr
*tb
[IFLA_MAX
+1];
1523 char ifname
[IFNAMSIZ
];
1525 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFLA_MAX
, ifla_policy
);
1529 if (tb
[IFLA_IFNAME
])
1530 nla_strlcpy(ifname
, tb
[IFLA_IFNAME
], IFNAMSIZ
);
1535 ifm
= nlmsg_data(nlh
);
1536 if (ifm
->ifi_index
> 0)
1537 dev
= __dev_get_by_index(net
, ifm
->ifi_index
);
1538 else if (tb
[IFLA_IFNAME
])
1539 dev
= __dev_get_by_name(net
, ifname
);
1548 err
= validate_linkmsg(dev
, tb
);
1552 err
= do_setlink(dev
, ifm
, tb
, ifname
, 0);
1557 static int rtnl_dellink(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
1559 struct net
*net
= sock_net(skb
->sk
);
1560 const struct rtnl_link_ops
*ops
;
1561 struct net_device
*dev
;
1562 struct ifinfomsg
*ifm
;
1563 char ifname
[IFNAMSIZ
];
1564 struct nlattr
*tb
[IFLA_MAX
+1];
1566 LIST_HEAD(list_kill
);
1568 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFLA_MAX
, ifla_policy
);
1572 if (tb
[IFLA_IFNAME
])
1573 nla_strlcpy(ifname
, tb
[IFLA_IFNAME
], IFNAMSIZ
);
1575 ifm
= nlmsg_data(nlh
);
1576 if (ifm
->ifi_index
> 0)
1577 dev
= __dev_get_by_index(net
, ifm
->ifi_index
);
1578 else if (tb
[IFLA_IFNAME
])
1579 dev
= __dev_get_by_name(net
, ifname
);
1586 ops
= dev
->rtnl_link_ops
;
1590 ops
->dellink(dev
, &list_kill
);
1591 unregister_netdevice_many(&list_kill
);
1592 list_del(&list_kill
);
1596 int rtnl_configure_link(struct net_device
*dev
, const struct ifinfomsg
*ifm
)
1598 unsigned int old_flags
;
1601 old_flags
= dev
->flags
;
1602 if (ifm
&& (ifm
->ifi_flags
|| ifm
->ifi_change
)) {
1603 err
= __dev_change_flags(dev
, rtnl_dev_combine_flags(dev
, ifm
));
1608 dev
->rtnl_link_state
= RTNL_LINK_INITIALIZED
;
1609 rtmsg_ifinfo(RTM_NEWLINK
, dev
, ~0U);
1611 __dev_notify_flags(dev
, old_flags
);
1614 EXPORT_SYMBOL(rtnl_configure_link
);
1616 struct net_device
*rtnl_create_link(struct net
*net
,
1617 char *ifname
, const struct rtnl_link_ops
*ops
, struct nlattr
*tb
[])
1620 struct net_device
*dev
;
1621 unsigned int num_tx_queues
= 1;
1622 unsigned int num_rx_queues
= 1;
1624 if (tb
[IFLA_NUM_TX_QUEUES
])
1625 num_tx_queues
= nla_get_u32(tb
[IFLA_NUM_TX_QUEUES
]);
1626 else if (ops
->get_num_tx_queues
)
1627 num_tx_queues
= ops
->get_num_tx_queues();
1629 if (tb
[IFLA_NUM_RX_QUEUES
])
1630 num_rx_queues
= nla_get_u32(tb
[IFLA_NUM_RX_QUEUES
]);
1631 else if (ops
->get_num_rx_queues
)
1632 num_rx_queues
= ops
->get_num_rx_queues();
1635 dev
= alloc_netdev_mqs(ops
->priv_size
, ifname
, ops
->setup
,
1636 num_tx_queues
, num_rx_queues
);
1640 dev_net_set(dev
, net
);
1641 dev
->rtnl_link_ops
= ops
;
1642 dev
->rtnl_link_state
= RTNL_LINK_INITIALIZING
;
1645 dev
->mtu
= nla_get_u32(tb
[IFLA_MTU
]);
1646 if (tb
[IFLA_ADDRESS
]) {
1647 memcpy(dev
->dev_addr
, nla_data(tb
[IFLA_ADDRESS
]),
1648 nla_len(tb
[IFLA_ADDRESS
]));
1649 dev
->addr_assign_type
= NET_ADDR_SET
;
1651 if (tb
[IFLA_BROADCAST
])
1652 memcpy(dev
->broadcast
, nla_data(tb
[IFLA_BROADCAST
]),
1653 nla_len(tb
[IFLA_BROADCAST
]));
1654 if (tb
[IFLA_TXQLEN
])
1655 dev
->tx_queue_len
= nla_get_u32(tb
[IFLA_TXQLEN
]);
1656 if (tb
[IFLA_OPERSTATE
])
1657 set_operstate(dev
, nla_get_u8(tb
[IFLA_OPERSTATE
]));
1658 if (tb
[IFLA_LINKMODE
])
1659 dev
->link_mode
= nla_get_u8(tb
[IFLA_LINKMODE
]);
1661 dev_set_group(dev
, nla_get_u32(tb
[IFLA_GROUP
]));
1666 return ERR_PTR(err
);
1668 EXPORT_SYMBOL(rtnl_create_link
);
1670 static int rtnl_group_changelink(struct net
*net
, int group
,
1671 struct ifinfomsg
*ifm
,
1674 struct net_device
*dev
;
1677 for_each_netdev(net
, dev
) {
1678 if (dev
->group
== group
) {
1679 err
= do_setlink(dev
, ifm
, tb
, NULL
, 0);
1688 static int rtnl_newlink(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
1690 struct net
*net
= sock_net(skb
->sk
);
1691 const struct rtnl_link_ops
*ops
;
1692 struct net_device
*dev
;
1693 struct ifinfomsg
*ifm
;
1694 char kind
[MODULE_NAME_LEN
];
1695 char ifname
[IFNAMSIZ
];
1696 struct nlattr
*tb
[IFLA_MAX
+1];
1697 struct nlattr
*linkinfo
[IFLA_INFO_MAX
+1];
1700 #ifdef CONFIG_MODULES
1703 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFLA_MAX
, ifla_policy
);
1707 if (tb
[IFLA_IFNAME
])
1708 nla_strlcpy(ifname
, tb
[IFLA_IFNAME
], IFNAMSIZ
);
1712 ifm
= nlmsg_data(nlh
);
1713 if (ifm
->ifi_index
> 0)
1714 dev
= __dev_get_by_index(net
, ifm
->ifi_index
);
1717 dev
= __dev_get_by_name(net
, ifname
);
1722 err
= validate_linkmsg(dev
, tb
);
1726 if (tb
[IFLA_LINKINFO
]) {
1727 err
= nla_parse_nested(linkinfo
, IFLA_INFO_MAX
,
1728 tb
[IFLA_LINKINFO
], ifla_info_policy
);
1732 memset(linkinfo
, 0, sizeof(linkinfo
));
1734 if (linkinfo
[IFLA_INFO_KIND
]) {
1735 nla_strlcpy(kind
, linkinfo
[IFLA_INFO_KIND
], sizeof(kind
));
1736 ops
= rtnl_link_ops_get(kind
);
1743 struct nlattr
*attr
[ops
? ops
->maxtype
+ 1 : 0], **data
= NULL
;
1744 struct net
*dest_net
;
1747 if (ops
->maxtype
&& linkinfo
[IFLA_INFO_DATA
]) {
1748 err
= nla_parse_nested(attr
, ops
->maxtype
,
1749 linkinfo
[IFLA_INFO_DATA
],
1755 if (ops
->validate
) {
1756 err
= ops
->validate(tb
, data
);
1765 if (nlh
->nlmsg_flags
& NLM_F_EXCL
)
1767 if (nlh
->nlmsg_flags
& NLM_F_REPLACE
)
1770 if (linkinfo
[IFLA_INFO_DATA
]) {
1771 if (!ops
|| ops
!= dev
->rtnl_link_ops
||
1775 err
= ops
->changelink(dev
, tb
, data
);
1781 return do_setlink(dev
, ifm
, tb
, ifname
, modified
);
1784 if (!(nlh
->nlmsg_flags
& NLM_F_CREATE
)) {
1785 if (ifm
->ifi_index
== 0 && tb
[IFLA_GROUP
])
1786 return rtnl_group_changelink(net
,
1787 nla_get_u32(tb
[IFLA_GROUP
]),
1792 if (tb
[IFLA_MAP
] || tb
[IFLA_MASTER
] || tb
[IFLA_PROTINFO
])
1796 #ifdef CONFIG_MODULES
1799 request_module("rtnl-link-%s", kind
);
1801 ops
= rtnl_link_ops_get(kind
);
1810 snprintf(ifname
, IFNAMSIZ
, "%s%%d", ops
->kind
);
1812 dest_net
= rtnl_link_get_net(net
, tb
);
1813 if (IS_ERR(dest_net
))
1814 return PTR_ERR(dest_net
);
1816 dev
= rtnl_create_link(dest_net
, ifname
, ops
, tb
);
1822 dev
->ifindex
= ifm
->ifi_index
;
1825 err
= ops
->newlink(net
, dev
, tb
, data
);
1827 err
= register_netdevice(dev
);
1829 if (err
< 0 && !IS_ERR(dev
))
1834 err
= rtnl_configure_link(dev
, ifm
);
1836 unregister_netdevice(dev
);
1843 static int rtnl_getlink(struct sk_buff
*skb
, struct nlmsghdr
* nlh
)
1845 struct net
*net
= sock_net(skb
->sk
);
1846 struct ifinfomsg
*ifm
;
1847 char ifname
[IFNAMSIZ
];
1848 struct nlattr
*tb
[IFLA_MAX
+1];
1849 struct net_device
*dev
= NULL
;
1850 struct sk_buff
*nskb
;
1852 u32 ext_filter_mask
= 0;
1854 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFLA_MAX
, ifla_policy
);
1858 if (tb
[IFLA_IFNAME
])
1859 nla_strlcpy(ifname
, tb
[IFLA_IFNAME
], IFNAMSIZ
);
1861 if (tb
[IFLA_EXT_MASK
])
1862 ext_filter_mask
= nla_get_u32(tb
[IFLA_EXT_MASK
]);
1864 ifm
= nlmsg_data(nlh
);
1865 if (ifm
->ifi_index
> 0)
1866 dev
= __dev_get_by_index(net
, ifm
->ifi_index
);
1867 else if (tb
[IFLA_IFNAME
])
1868 dev
= __dev_get_by_name(net
, ifname
);
1875 nskb
= nlmsg_new(if_nlmsg_size(dev
, ext_filter_mask
), GFP_KERNEL
);
1879 err
= rtnl_fill_ifinfo(nskb
, dev
, RTM_NEWLINK
, NETLINK_CB(skb
).portid
,
1880 nlh
->nlmsg_seq
, 0, 0, ext_filter_mask
);
1882 /* -EMSGSIZE implies BUG in if_nlmsg_size */
1883 WARN_ON(err
== -EMSGSIZE
);
1886 err
= rtnl_unicast(nskb
, net
, NETLINK_CB(skb
).portid
);
1891 static u16
rtnl_calcit(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
1893 struct net
*net
= sock_net(skb
->sk
);
1894 struct net_device
*dev
;
1895 struct nlattr
*tb
[IFLA_MAX
+1];
1896 u32 ext_filter_mask
= 0;
1897 u16 min_ifinfo_dump_size
= 0;
1899 if (nlmsg_parse(nlh
, sizeof(struct ifinfomsg
), tb
, IFLA_MAX
,
1900 ifla_policy
) >= 0) {
1901 if (tb
[IFLA_EXT_MASK
])
1902 ext_filter_mask
= nla_get_u32(tb
[IFLA_EXT_MASK
]);
1905 if (!ext_filter_mask
)
1906 return NLMSG_GOODSIZE
;
1908 * traverse the list of net devices and compute the minimum
1909 * buffer size based upon the filter mask.
1911 list_for_each_entry(dev
, &net
->dev_base_head
, dev_list
) {
1912 min_ifinfo_dump_size
= max_t(u16
, min_ifinfo_dump_size
,
1917 return min_ifinfo_dump_size
;
1920 static int rtnl_dump_all(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1923 int s_idx
= cb
->family
;
1927 for (idx
= 1; idx
<= RTNL_FAMILY_MAX
; idx
++) {
1928 int type
= cb
->nlh
->nlmsg_type
-RTM_BASE
;
1929 if (idx
< s_idx
|| idx
== PF_PACKET
)
1931 if (rtnl_msg_handlers
[idx
] == NULL
||
1932 rtnl_msg_handlers
[idx
][type
].dumpit
== NULL
)
1935 memset(&cb
->args
[0], 0, sizeof(cb
->args
));
1939 if (rtnl_msg_handlers
[idx
][type
].dumpit(skb
, cb
))
1947 void rtmsg_ifinfo(int type
, struct net_device
*dev
, unsigned int change
)
1949 struct net
*net
= dev_net(dev
);
1950 struct sk_buff
*skb
;
1952 size_t if_info_size
;
1954 skb
= nlmsg_new((if_info_size
= if_nlmsg_size(dev
, 0)), GFP_KERNEL
);
1958 err
= rtnl_fill_ifinfo(skb
, dev
, type
, 0, 0, change
, 0, 0);
1960 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
1961 WARN_ON(err
== -EMSGSIZE
);
1965 rtnl_notify(skb
, net
, 0, RTNLGRP_LINK
, NULL
, GFP_KERNEL
);
1969 rtnl_set_sk_err(net
, RTNLGRP_LINK
, err
);
1971 EXPORT_SYMBOL(rtmsg_ifinfo
);
1973 static int nlmsg_populate_fdb_fill(struct sk_buff
*skb
,
1974 struct net_device
*dev
,
1975 u8
*addr
, u32 pid
, u32 seq
,
1976 int type
, unsigned int flags
)
1978 struct nlmsghdr
*nlh
;
1981 nlh
= nlmsg_put(skb
, pid
, seq
, type
, sizeof(*ndm
), NLM_F_MULTI
);
1985 ndm
= nlmsg_data(nlh
);
1986 ndm
->ndm_family
= AF_BRIDGE
;
1989 ndm
->ndm_flags
= flags
;
1991 ndm
->ndm_ifindex
= dev
->ifindex
;
1992 ndm
->ndm_state
= NUD_PERMANENT
;
1994 if (nla_put(skb
, NDA_LLADDR
, ETH_ALEN
, addr
))
1995 goto nla_put_failure
;
1997 return nlmsg_end(skb
, nlh
);
2000 nlmsg_cancel(skb
, nlh
);
2004 static inline size_t rtnl_fdb_nlmsg_size(void)
2006 return NLMSG_ALIGN(sizeof(struct ndmsg
)) + nla_total_size(ETH_ALEN
);
2009 static void rtnl_fdb_notify(struct net_device
*dev
, u8
*addr
, int type
)
2011 struct net
*net
= dev_net(dev
);
2012 struct sk_buff
*skb
;
2015 skb
= nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC
);
2019 err
= nlmsg_populate_fdb_fill(skb
, dev
, addr
, 0, 0, type
, NTF_SELF
);
2025 rtnl_notify(skb
, net
, 0, RTNLGRP_NEIGH
, NULL
, GFP_ATOMIC
);
2028 rtnl_set_sk_err(net
, RTNLGRP_NEIGH
, err
);
2032 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2034 int ndo_dflt_fdb_add(struct ndmsg
*ndm
,
2035 struct nlattr
*tb
[],
2036 struct net_device
*dev
,
2037 const unsigned char *addr
,
2042 /* If aging addresses are supported device will need to
2043 * implement its own handler for this.
2045 if (ndm
->ndm_state
&& !(ndm
->ndm_state
& NUD_PERMANENT
)) {
2046 pr_info("%s: FDB only supports static addresses\n", dev
->name
);
2050 if (is_unicast_ether_addr(addr
) || is_link_local_ether_addr(addr
))
2051 err
= dev_uc_add_excl(dev
, addr
);
2052 else if (is_multicast_ether_addr(addr
))
2053 err
= dev_mc_add_excl(dev
, addr
);
2055 /* Only return duplicate errors if NLM_F_EXCL is set */
2056 if (err
== -EEXIST
&& !(flags
& NLM_F_EXCL
))
2061 EXPORT_SYMBOL(ndo_dflt_fdb_add
);
2063 static int rtnl_fdb_add(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
2065 struct net
*net
= sock_net(skb
->sk
);
2067 struct nlattr
*tb
[NDA_MAX
+1];
2068 struct net_device
*dev
;
2072 err
= nlmsg_parse(nlh
, sizeof(*ndm
), tb
, NDA_MAX
, NULL
);
2076 ndm
= nlmsg_data(nlh
);
2077 if (ndm
->ndm_ifindex
== 0) {
2078 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2082 dev
= __dev_get_by_index(net
, ndm
->ndm_ifindex
);
2084 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2088 if (!tb
[NDA_LLADDR
] || nla_len(tb
[NDA_LLADDR
]) != ETH_ALEN
) {
2089 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2093 addr
= nla_data(tb
[NDA_LLADDR
]);
2094 if (is_zero_ether_addr(addr
)) {
2095 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ether address\n");
2101 /* Support fdb on master device the net/bridge default case */
2102 if ((!ndm
->ndm_flags
|| ndm
->ndm_flags
& NTF_MASTER
) &&
2103 (dev
->priv_flags
& IFF_BRIDGE_PORT
)) {
2104 struct net_device
*br_dev
= netdev_master_upper_dev_get(dev
);
2105 const struct net_device_ops
*ops
= br_dev
->netdev_ops
;
2107 err
= ops
->ndo_fdb_add(ndm
, tb
, dev
, addr
, nlh
->nlmsg_flags
);
2111 ndm
->ndm_flags
&= ~NTF_MASTER
;
2114 /* Embedded bridge, macvlan, and any other device support */
2115 if ((ndm
->ndm_flags
& NTF_SELF
)) {
2116 if (dev
->netdev_ops
->ndo_fdb_add
)
2117 err
= dev
->netdev_ops
->ndo_fdb_add(ndm
, tb
, dev
, addr
,
2120 err
= ndo_dflt_fdb_add(ndm
, tb
, dev
, addr
,
2124 rtnl_fdb_notify(dev
, addr
, RTM_NEWNEIGH
);
2125 ndm
->ndm_flags
&= ~NTF_SELF
;
2133 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
2135 int ndo_dflt_fdb_del(struct ndmsg
*ndm
,
2136 struct nlattr
*tb
[],
2137 struct net_device
*dev
,
2138 const unsigned char *addr
)
2140 int err
= -EOPNOTSUPP
;
2142 /* If aging addresses are supported device will need to
2143 * implement its own handler for this.
2145 if (ndm
->ndm_state
& NUD_PERMANENT
) {
2146 pr_info("%s: FDB only supports static addresses\n", dev
->name
);
2150 if (is_unicast_ether_addr(addr
) || is_link_local_ether_addr(addr
))
2151 err
= dev_uc_del(dev
, addr
);
2152 else if (is_multicast_ether_addr(addr
))
2153 err
= dev_mc_del(dev
, addr
);
2159 EXPORT_SYMBOL(ndo_dflt_fdb_del
);
2161 static int rtnl_fdb_del(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
2163 struct net
*net
= sock_net(skb
->sk
);
2165 struct nlattr
*tb
[NDA_MAX
+1];
2166 struct net_device
*dev
;
2170 if (!capable(CAP_NET_ADMIN
))
2173 err
= nlmsg_parse(nlh
, sizeof(*ndm
), tb
, NDA_MAX
, NULL
);
2177 ndm
= nlmsg_data(nlh
);
2178 if (ndm
->ndm_ifindex
== 0) {
2179 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
2183 dev
= __dev_get_by_index(net
, ndm
->ndm_ifindex
);
2185 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
2189 if (!tb
[NDA_LLADDR
] || nla_len(tb
[NDA_LLADDR
]) != ETH_ALEN
) {
2190 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
2194 addr
= nla_data(tb
[NDA_LLADDR
]);
2195 if (is_zero_ether_addr(addr
)) {
2196 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ether address\n");
2202 /* Support fdb on master device the net/bridge default case */
2203 if ((!ndm
->ndm_flags
|| ndm
->ndm_flags
& NTF_MASTER
) &&
2204 (dev
->priv_flags
& IFF_BRIDGE_PORT
)) {
2205 struct net_device
*br_dev
= netdev_master_upper_dev_get(dev
);
2206 const struct net_device_ops
*ops
= br_dev
->netdev_ops
;
2208 if (ops
->ndo_fdb_del
)
2209 err
= ops
->ndo_fdb_del(ndm
, tb
, dev
, addr
);
2214 ndm
->ndm_flags
&= ~NTF_MASTER
;
2217 /* Embedded bridge, macvlan, and any other device support */
2218 if (ndm
->ndm_flags
& NTF_SELF
) {
2219 if (dev
->netdev_ops
->ndo_fdb_del
)
2220 err
= dev
->netdev_ops
->ndo_fdb_del(ndm
, tb
, dev
, addr
);
2222 err
= ndo_dflt_fdb_del(ndm
, tb
, dev
, addr
);
2225 rtnl_fdb_notify(dev
, addr
, RTM_DELNEIGH
);
2226 ndm
->ndm_flags
&= ~NTF_SELF
;
2233 static int nlmsg_populate_fdb(struct sk_buff
*skb
,
2234 struct netlink_callback
*cb
,
2235 struct net_device
*dev
,
2237 struct netdev_hw_addr_list
*list
)
2239 struct netdev_hw_addr
*ha
;
2243 portid
= NETLINK_CB(cb
->skb
).portid
;
2244 seq
= cb
->nlh
->nlmsg_seq
;
2246 list_for_each_entry(ha
, &list
->list
, list
) {
2247 if (*idx
< cb
->args
[0])
2250 err
= nlmsg_populate_fdb_fill(skb
, dev
, ha
->addr
,
2252 RTM_NEWNEIGH
, NTF_SELF
);
2262 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
2263 * @nlh: netlink message header
2266 * Default netdevice operation to dump the existing unicast address list.
2267 * Returns number of addresses from list put in skb.
2269 int ndo_dflt_fdb_dump(struct sk_buff
*skb
,
2270 struct netlink_callback
*cb
,
2271 struct net_device
*dev
,
2276 netif_addr_lock_bh(dev
);
2277 err
= nlmsg_populate_fdb(skb
, cb
, dev
, &idx
, &dev
->uc
);
2280 nlmsg_populate_fdb(skb
, cb
, dev
, &idx
, &dev
->mc
);
2282 netif_addr_unlock_bh(dev
);
2285 EXPORT_SYMBOL(ndo_dflt_fdb_dump
);
2287 static int rtnl_fdb_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2290 struct net
*net
= sock_net(skb
->sk
);
2291 struct net_device
*dev
;
2294 for_each_netdev_rcu(net
, dev
) {
2295 if (dev
->priv_flags
& IFF_BRIDGE_PORT
) {
2296 struct net_device
*br_dev
;
2297 const struct net_device_ops
*ops
;
2299 br_dev
= netdev_master_upper_dev_get(dev
);
2300 ops
= br_dev
->netdev_ops
;
2301 if (ops
->ndo_fdb_dump
)
2302 idx
= ops
->ndo_fdb_dump(skb
, cb
, dev
, idx
);
2305 if (dev
->netdev_ops
->ndo_fdb_dump
)
2306 idx
= dev
->netdev_ops
->ndo_fdb_dump(skb
, cb
, dev
, idx
);
2308 idx
= ndo_dflt_fdb_dump(skb
, cb
, dev
, idx
);
2316 int ndo_dflt_bridge_getlink(struct sk_buff
*skb
, u32 pid
, u32 seq
,
2317 struct net_device
*dev
, u16 mode
)
2319 struct nlmsghdr
*nlh
;
2320 struct ifinfomsg
*ifm
;
2321 struct nlattr
*br_afspec
;
2322 u8 operstate
= netif_running(dev
) ? dev
->operstate
: IF_OPER_DOWN
;
2323 struct net_device
*br_dev
= netdev_master_upper_dev_get(dev
);
2325 nlh
= nlmsg_put(skb
, pid
, seq
, RTM_NEWLINK
, sizeof(*ifm
), NLM_F_MULTI
);
2329 ifm
= nlmsg_data(nlh
);
2330 ifm
->ifi_family
= AF_BRIDGE
;
2332 ifm
->ifi_type
= dev
->type
;
2333 ifm
->ifi_index
= dev
->ifindex
;
2334 ifm
->ifi_flags
= dev_get_flags(dev
);
2335 ifm
->ifi_change
= 0;
2338 if (nla_put_string(skb
, IFLA_IFNAME
, dev
->name
) ||
2339 nla_put_u32(skb
, IFLA_MTU
, dev
->mtu
) ||
2340 nla_put_u8(skb
, IFLA_OPERSTATE
, operstate
) ||
2342 nla_put_u32(skb
, IFLA_MASTER
, br_dev
->ifindex
)) ||
2344 nla_put(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
)) ||
2345 (dev
->ifindex
!= dev
->iflink
&&
2346 nla_put_u32(skb
, IFLA_LINK
, dev
->iflink
)))
2347 goto nla_put_failure
;
2349 br_afspec
= nla_nest_start(skb
, IFLA_AF_SPEC
);
2351 goto nla_put_failure
;
2353 if (nla_put_u16(skb
, IFLA_BRIDGE_FLAGS
, BRIDGE_FLAGS_SELF
) ||
2354 nla_put_u16(skb
, IFLA_BRIDGE_MODE
, mode
)) {
2355 nla_nest_cancel(skb
, br_afspec
);
2356 goto nla_put_failure
;
2358 nla_nest_end(skb
, br_afspec
);
2360 return nlmsg_end(skb
, nlh
);
2362 nlmsg_cancel(skb
, nlh
);
2365 EXPORT_SYMBOL(ndo_dflt_bridge_getlink
);
2367 static int rtnl_bridge_getlink(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2369 struct net
*net
= sock_net(skb
->sk
);
2370 struct net_device
*dev
;
2372 u32 portid
= NETLINK_CB(cb
->skb
).portid
;
2373 u32 seq
= cb
->nlh
->nlmsg_seq
;
2374 struct nlattr
*extfilt
;
2375 u32 filter_mask
= 0;
2377 extfilt
= nlmsg_find_attr(cb
->nlh
, sizeof(struct rtgenmsg
),
2380 filter_mask
= nla_get_u32(extfilt
);
2383 for_each_netdev_rcu(net
, dev
) {
2384 const struct net_device_ops
*ops
= dev
->netdev_ops
;
2385 struct net_device
*br_dev
= netdev_master_upper_dev_get(dev
);
2387 if (br_dev
&& br_dev
->netdev_ops
->ndo_bridge_getlink
) {
2388 if (idx
>= cb
->args
[0] &&
2389 br_dev
->netdev_ops
->ndo_bridge_getlink(
2390 skb
, portid
, seq
, dev
, filter_mask
) < 0)
2395 if (ops
->ndo_bridge_getlink
) {
2396 if (idx
>= cb
->args
[0] &&
2397 ops
->ndo_bridge_getlink(skb
, portid
, seq
, dev
,
2409 static inline size_t bridge_nlmsg_size(void)
2411 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
2412 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
2413 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
2414 + nla_total_size(sizeof(u32
)) /* IFLA_MASTER */
2415 + nla_total_size(sizeof(u32
)) /* IFLA_MTU */
2416 + nla_total_size(sizeof(u32
)) /* IFLA_LINK */
2417 + nla_total_size(sizeof(u32
)) /* IFLA_OPERSTATE */
2418 + nla_total_size(sizeof(u8
)) /* IFLA_PROTINFO */
2419 + nla_total_size(sizeof(struct nlattr
)) /* IFLA_AF_SPEC */
2420 + nla_total_size(sizeof(u16
)) /* IFLA_BRIDGE_FLAGS */
2421 + nla_total_size(sizeof(u16
)); /* IFLA_BRIDGE_MODE */
2424 static int rtnl_bridge_notify(struct net_device
*dev
, u16 flags
)
2426 struct net
*net
= dev_net(dev
);
2427 struct net_device
*br_dev
= netdev_master_upper_dev_get(dev
);
2428 struct sk_buff
*skb
;
2429 int err
= -EOPNOTSUPP
;
2431 skb
= nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC
);
2437 if ((!flags
|| (flags
& BRIDGE_FLAGS_MASTER
)) &&
2438 br_dev
&& br_dev
->netdev_ops
->ndo_bridge_getlink
) {
2439 err
= br_dev
->netdev_ops
->ndo_bridge_getlink(skb
, 0, 0, dev
, 0);
2444 if ((flags
& BRIDGE_FLAGS_SELF
) &&
2445 dev
->netdev_ops
->ndo_bridge_getlink
) {
2446 err
= dev
->netdev_ops
->ndo_bridge_getlink(skb
, 0, 0, dev
, 0);
2451 rtnl_notify(skb
, net
, 0, RTNLGRP_LINK
, NULL
, GFP_ATOMIC
);
2454 WARN_ON(err
== -EMSGSIZE
);
2456 rtnl_set_sk_err(net
, RTNLGRP_LINK
, err
);
2460 static int rtnl_bridge_setlink(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
2462 struct net
*net
= sock_net(skb
->sk
);
2463 struct ifinfomsg
*ifm
;
2464 struct net_device
*dev
;
2465 struct nlattr
*br_spec
, *attr
= NULL
;
2466 int rem
, err
= -EOPNOTSUPP
;
2467 u16 oflags
, flags
= 0;
2468 bool have_flags
= false;
2470 if (nlmsg_len(nlh
) < sizeof(*ifm
))
2473 ifm
= nlmsg_data(nlh
);
2474 if (ifm
->ifi_family
!= AF_BRIDGE
)
2475 return -EPFNOSUPPORT
;
2477 dev
= __dev_get_by_index(net
, ifm
->ifi_index
);
2479 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2483 br_spec
= nlmsg_find_attr(nlh
, sizeof(struct ifinfomsg
), IFLA_AF_SPEC
);
2485 nla_for_each_nested(attr
, br_spec
, rem
) {
2486 if (nla_type(attr
) == IFLA_BRIDGE_FLAGS
) {
2488 flags
= nla_get_u16(attr
);
2496 if (!flags
|| (flags
& BRIDGE_FLAGS_MASTER
)) {
2497 struct net_device
*br_dev
= netdev_master_upper_dev_get(dev
);
2499 if (!br_dev
|| !br_dev
->netdev_ops
->ndo_bridge_setlink
) {
2504 err
= br_dev
->netdev_ops
->ndo_bridge_setlink(dev
, nlh
);
2508 flags
&= ~BRIDGE_FLAGS_MASTER
;
2511 if ((flags
& BRIDGE_FLAGS_SELF
)) {
2512 if (!dev
->netdev_ops
->ndo_bridge_setlink
)
2515 err
= dev
->netdev_ops
->ndo_bridge_setlink(dev
, nlh
);
2518 flags
&= ~BRIDGE_FLAGS_SELF
;
2522 memcpy(nla_data(attr
), &flags
, sizeof(flags
));
2523 /* Generate event to notify upper layer of bridge change */
2525 err
= rtnl_bridge_notify(dev
, oflags
);
2530 static int rtnl_bridge_dellink(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
2532 struct net
*net
= sock_net(skb
->sk
);
2533 struct ifinfomsg
*ifm
;
2534 struct net_device
*dev
;
2535 struct nlattr
*br_spec
, *attr
= NULL
;
2536 int rem
, err
= -EOPNOTSUPP
;
2537 u16 oflags
, flags
= 0;
2538 bool have_flags
= false;
2540 if (nlmsg_len(nlh
) < sizeof(*ifm
))
2543 ifm
= nlmsg_data(nlh
);
2544 if (ifm
->ifi_family
!= AF_BRIDGE
)
2545 return -EPFNOSUPPORT
;
2547 dev
= __dev_get_by_index(net
, ifm
->ifi_index
);
2549 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
2553 br_spec
= nlmsg_find_attr(nlh
, sizeof(struct ifinfomsg
), IFLA_AF_SPEC
);
2555 nla_for_each_nested(attr
, br_spec
, rem
) {
2556 if (nla_type(attr
) == IFLA_BRIDGE_FLAGS
) {
2558 flags
= nla_get_u16(attr
);
2566 if (!flags
|| (flags
& BRIDGE_FLAGS_MASTER
)) {
2567 struct net_device
*br_dev
= netdev_master_upper_dev_get(dev
);
2569 if (!br_dev
|| !br_dev
->netdev_ops
->ndo_bridge_dellink
) {
2574 err
= br_dev
->netdev_ops
->ndo_bridge_dellink(dev
, nlh
);
2578 flags
&= ~BRIDGE_FLAGS_MASTER
;
2581 if ((flags
& BRIDGE_FLAGS_SELF
)) {
2582 if (!dev
->netdev_ops
->ndo_bridge_dellink
)
2585 err
= dev
->netdev_ops
->ndo_bridge_dellink(dev
, nlh
);
2588 flags
&= ~BRIDGE_FLAGS_SELF
;
2592 memcpy(nla_data(attr
), &flags
, sizeof(flags
));
2593 /* Generate event to notify upper layer of bridge change */
2595 err
= rtnl_bridge_notify(dev
, oflags
);
2600 /* Process one rtnetlink message. */
2602 static int rtnetlink_rcv_msg(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
2604 struct net
*net
= sock_net(skb
->sk
);
2605 rtnl_doit_func doit
;
2611 type
= nlh
->nlmsg_type
;
2617 /* All the messages must have at least 1 byte length */
2618 if (nlmsg_len(nlh
) < sizeof(struct rtgenmsg
))
2621 family
= ((struct rtgenmsg
*)nlmsg_data(nlh
))->rtgen_family
;
2625 if (kind
!= 2 && !ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
2628 if (kind
== 2 && nlh
->nlmsg_flags
&NLM_F_DUMP
) {
2630 rtnl_dumpit_func dumpit
;
2631 rtnl_calcit_func calcit
;
2632 u16 min_dump_alloc
= 0;
2634 dumpit
= rtnl_get_dumpit(family
, type
);
2637 calcit
= rtnl_get_calcit(family
, type
);
2639 min_dump_alloc
= calcit(skb
, nlh
);
2644 struct netlink_dump_control c
= {
2646 .min_dump_alloc
= min_dump_alloc
,
2648 err
= netlink_dump_start(rtnl
, skb
, nlh
, &c
);
2654 doit
= rtnl_get_doit(family
, type
);
2658 return doit(skb
, nlh
);
2661 static void rtnetlink_rcv(struct sk_buff
*skb
)
2664 netlink_rcv_skb(skb
, &rtnetlink_rcv_msg
);
2668 static int rtnetlink_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
2670 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
2676 case NETDEV_POST_INIT
:
2677 case NETDEV_REGISTER
:
2679 case NETDEV_PRE_TYPE_CHANGE
:
2680 case NETDEV_GOING_DOWN
:
2681 case NETDEV_UNREGISTER
:
2682 case NETDEV_UNREGISTER_FINAL
:
2683 case NETDEV_RELEASE
:
2687 rtmsg_ifinfo(RTM_NEWLINK
, dev
, 0);
2693 static struct notifier_block rtnetlink_dev_notifier
= {
2694 .notifier_call
= rtnetlink_event
,
2698 static int __net_init
rtnetlink_net_init(struct net
*net
)
2701 struct netlink_kernel_cfg cfg
= {
2702 .groups
= RTNLGRP_MAX
,
2703 .input
= rtnetlink_rcv
,
2704 .cb_mutex
= &rtnl_mutex
,
2705 .flags
= NL_CFG_F_NONROOT_RECV
,
2708 sk
= netlink_kernel_create(net
, NETLINK_ROUTE
, &cfg
);
2715 static void __net_exit
rtnetlink_net_exit(struct net
*net
)
2717 netlink_kernel_release(net
->rtnl
);
2721 static struct pernet_operations rtnetlink_net_ops
= {
2722 .init
= rtnetlink_net_init
,
2723 .exit
= rtnetlink_net_exit
,
2726 void __init
rtnetlink_init(void)
2728 if (register_pernet_subsys(&rtnetlink_net_ops
))
2729 panic("rtnetlink_init: cannot initialize rtnetlink\n");
2731 register_netdevice_notifier(&rtnetlink_dev_notifier
);
2733 rtnl_register(PF_UNSPEC
, RTM_GETLINK
, rtnl_getlink
,
2734 rtnl_dump_ifinfo
, rtnl_calcit
);
2735 rtnl_register(PF_UNSPEC
, RTM_SETLINK
, rtnl_setlink
, NULL
, NULL
);
2736 rtnl_register(PF_UNSPEC
, RTM_NEWLINK
, rtnl_newlink
, NULL
, NULL
);
2737 rtnl_register(PF_UNSPEC
, RTM_DELLINK
, rtnl_dellink
, NULL
, NULL
);
2739 rtnl_register(PF_UNSPEC
, RTM_GETADDR
, NULL
, rtnl_dump_all
, NULL
);
2740 rtnl_register(PF_UNSPEC
, RTM_GETROUTE
, NULL
, rtnl_dump_all
, NULL
);
2742 rtnl_register(PF_BRIDGE
, RTM_NEWNEIGH
, rtnl_fdb_add
, NULL
, NULL
);
2743 rtnl_register(PF_BRIDGE
, RTM_DELNEIGH
, rtnl_fdb_del
, NULL
, NULL
);
2744 rtnl_register(PF_BRIDGE
, RTM_GETNEIGH
, NULL
, rtnl_fdb_dump
, NULL
);
2746 rtnl_register(PF_BRIDGE
, RTM_GETLINK
, NULL
, rtnl_bridge_getlink
, NULL
);
2747 rtnl_register(PF_BRIDGE
, RTM_DELLINK
, rtnl_bridge_dellink
, NULL
, NULL
);
2748 rtnl_register(PF_BRIDGE
, RTM_SETLINK
, rtnl_bridge_setlink
, NULL
, NULL
);