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/pci.h>
40 #include <asm/uaccess.h>
41 #include <asm/system.h>
43 #include <linux/inet.h>
44 #include <linux/netdevice.h>
46 #include <net/protocol.h>
48 #include <net/route.h>
51 #include <net/pkt_sched.h>
52 #include <net/fib_rules.h>
53 #include <net/rtnetlink.h>
54 #include <net/net_namespace.h>
58 rtnl_dumpit_func dumpit
;
61 static DEFINE_MUTEX(rtnl_mutex
);
65 mutex_lock(&rtnl_mutex
);
67 EXPORT_SYMBOL(rtnl_lock
);
69 void __rtnl_unlock(void)
71 mutex_unlock(&rtnl_mutex
);
74 void rtnl_unlock(void)
76 /* This fellow will unlock it for us. */
79 EXPORT_SYMBOL(rtnl_unlock
);
81 int rtnl_trylock(void)
83 return mutex_trylock(&rtnl_mutex
);
85 EXPORT_SYMBOL(rtnl_trylock
);
87 int rtnl_is_locked(void)
89 return mutex_is_locked(&rtnl_mutex
);
91 EXPORT_SYMBOL(rtnl_is_locked
);
93 #ifdef CONFIG_PROVE_LOCKING
94 int lockdep_rtnl_is_held(void)
96 return lockdep_is_held(&rtnl_mutex
);
98 EXPORT_SYMBOL(lockdep_rtnl_is_held
);
99 #endif /* #ifdef CONFIG_PROVE_LOCKING */
101 static struct rtnl_link
*rtnl_msg_handlers
[RTNL_FAMILY_MAX
+ 1];
103 static inline int rtm_msgindex(int msgtype
)
105 int msgindex
= msgtype
- RTM_BASE
;
108 * msgindex < 0 implies someone tried to register a netlink
109 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
110 * the message type has not been added to linux/rtnetlink.h
112 BUG_ON(msgindex
< 0 || msgindex
>= RTM_NR_MSGTYPES
);
117 static rtnl_doit_func
rtnl_get_doit(int protocol
, int msgindex
)
119 struct rtnl_link
*tab
;
121 if (protocol
<= RTNL_FAMILY_MAX
)
122 tab
= rtnl_msg_handlers
[protocol
];
126 if (tab
== NULL
|| tab
[msgindex
].doit
== NULL
)
127 tab
= rtnl_msg_handlers
[PF_UNSPEC
];
129 return tab
? tab
[msgindex
].doit
: NULL
;
132 static rtnl_dumpit_func
rtnl_get_dumpit(int protocol
, int msgindex
)
134 struct rtnl_link
*tab
;
136 if (protocol
<= RTNL_FAMILY_MAX
)
137 tab
= rtnl_msg_handlers
[protocol
];
141 if (tab
== NULL
|| tab
[msgindex
].dumpit
== NULL
)
142 tab
= rtnl_msg_handlers
[PF_UNSPEC
];
144 return tab
? tab
[msgindex
].dumpit
: NULL
;
148 * __rtnl_register - Register a rtnetlink message type
149 * @protocol: Protocol family or PF_UNSPEC
150 * @msgtype: rtnetlink message type
151 * @doit: Function pointer called for each request message
152 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
154 * Registers the specified function pointers (at least one of them has
155 * to be non-NULL) to be called whenever a request message for the
156 * specified protocol family and message type is received.
158 * The special protocol family PF_UNSPEC may be used to define fallback
159 * function pointers for the case when no entry for the specific protocol
162 * Returns 0 on success or a negative error code.
164 int __rtnl_register(int protocol
, int msgtype
,
165 rtnl_doit_func doit
, rtnl_dumpit_func dumpit
)
167 struct rtnl_link
*tab
;
170 BUG_ON(protocol
< 0 || protocol
> RTNL_FAMILY_MAX
);
171 msgindex
= rtm_msgindex(msgtype
);
173 tab
= rtnl_msg_handlers
[protocol
];
175 tab
= kcalloc(RTM_NR_MSGTYPES
, sizeof(*tab
), GFP_KERNEL
);
179 rtnl_msg_handlers
[protocol
] = tab
;
183 tab
[msgindex
].doit
= doit
;
186 tab
[msgindex
].dumpit
= dumpit
;
190 EXPORT_SYMBOL_GPL(__rtnl_register
);
193 * rtnl_register - Register a rtnetlink message type
195 * Identical to __rtnl_register() but panics on failure. This is useful
196 * as failure of this function is very unlikely, it can only happen due
197 * to lack of memory when allocating the chain to store all message
198 * handlers for a protocol. Meant for use in init functions where lack
199 * of memory implies no sense in continueing.
201 void rtnl_register(int protocol
, int msgtype
,
202 rtnl_doit_func doit
, rtnl_dumpit_func dumpit
)
204 if (__rtnl_register(protocol
, msgtype
, doit
, dumpit
) < 0)
205 panic("Unable to register rtnetlink message handler, "
206 "protocol = %d, message type = %d\n",
209 EXPORT_SYMBOL_GPL(rtnl_register
);
212 * rtnl_unregister - Unregister a rtnetlink message type
213 * @protocol: Protocol family or PF_UNSPEC
214 * @msgtype: rtnetlink message type
216 * Returns 0 on success or a negative error code.
218 int rtnl_unregister(int protocol
, int msgtype
)
222 BUG_ON(protocol
< 0 || protocol
> RTNL_FAMILY_MAX
);
223 msgindex
= rtm_msgindex(msgtype
);
225 if (rtnl_msg_handlers
[protocol
] == NULL
)
228 rtnl_msg_handlers
[protocol
][msgindex
].doit
= NULL
;
229 rtnl_msg_handlers
[protocol
][msgindex
].dumpit
= NULL
;
233 EXPORT_SYMBOL_GPL(rtnl_unregister
);
236 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
237 * @protocol : Protocol family or PF_UNSPEC
239 * Identical to calling rtnl_unregster() for all registered message types
240 * of a certain protocol family.
242 void rtnl_unregister_all(int protocol
)
244 BUG_ON(protocol
< 0 || protocol
> RTNL_FAMILY_MAX
);
246 kfree(rtnl_msg_handlers
[protocol
]);
247 rtnl_msg_handlers
[protocol
] = NULL
;
249 EXPORT_SYMBOL_GPL(rtnl_unregister_all
);
251 static LIST_HEAD(link_ops
);
254 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
255 * @ops: struct rtnl_link_ops * to register
257 * The caller must hold the rtnl_mutex. This function should be used
258 * by drivers that create devices during module initialization. It
259 * must be called before registering the devices.
261 * Returns 0 on success or a negative error code.
263 int __rtnl_link_register(struct rtnl_link_ops
*ops
)
266 ops
->dellink
= unregister_netdevice_queue
;
268 list_add_tail(&ops
->list
, &link_ops
);
271 EXPORT_SYMBOL_GPL(__rtnl_link_register
);
274 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
275 * @ops: struct rtnl_link_ops * to register
277 * Returns 0 on success or a negative error code.
279 int rtnl_link_register(struct rtnl_link_ops
*ops
)
284 err
= __rtnl_link_register(ops
);
288 EXPORT_SYMBOL_GPL(rtnl_link_register
);
290 static void __rtnl_kill_links(struct net
*net
, struct rtnl_link_ops
*ops
)
292 struct net_device
*dev
;
293 LIST_HEAD(list_kill
);
295 for_each_netdev(net
, dev
) {
296 if (dev
->rtnl_link_ops
== ops
)
297 ops
->dellink(dev
, &list_kill
);
299 unregister_netdevice_many(&list_kill
);
303 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
304 * @ops: struct rtnl_link_ops * to unregister
306 * The caller must hold the rtnl_mutex.
308 void __rtnl_link_unregister(struct rtnl_link_ops
*ops
)
313 __rtnl_kill_links(net
, ops
);
315 list_del(&ops
->list
);
317 EXPORT_SYMBOL_GPL(__rtnl_link_unregister
);
320 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
321 * @ops: struct rtnl_link_ops * to unregister
323 void rtnl_link_unregister(struct rtnl_link_ops
*ops
)
326 __rtnl_link_unregister(ops
);
329 EXPORT_SYMBOL_GPL(rtnl_link_unregister
);
331 static const struct rtnl_link_ops
*rtnl_link_ops_get(const char *kind
)
333 const struct rtnl_link_ops
*ops
;
335 list_for_each_entry(ops
, &link_ops
, list
) {
336 if (!strcmp(ops
->kind
, kind
))
342 static size_t rtnl_link_get_size(const struct net_device
*dev
)
344 const struct rtnl_link_ops
*ops
= dev
->rtnl_link_ops
;
350 size
= nla_total_size(sizeof(struct nlattr
)) + /* IFLA_LINKINFO */
351 nla_total_size(strlen(ops
->kind
) + 1); /* IFLA_INFO_KIND */
354 /* IFLA_INFO_DATA + nested data */
355 size
+= nla_total_size(sizeof(struct nlattr
)) +
358 if (ops
->get_xstats_size
)
359 /* IFLA_INFO_XSTATS */
360 size
+= nla_total_size(ops
->get_xstats_size(dev
));
365 static int rtnl_link_fill(struct sk_buff
*skb
, const struct net_device
*dev
)
367 const struct rtnl_link_ops
*ops
= dev
->rtnl_link_ops
;
368 struct nlattr
*linkinfo
, *data
;
371 linkinfo
= nla_nest_start(skb
, IFLA_LINKINFO
);
372 if (linkinfo
== NULL
)
375 if (nla_put_string(skb
, IFLA_INFO_KIND
, ops
->kind
) < 0)
376 goto err_cancel_link
;
377 if (ops
->fill_xstats
) {
378 err
= ops
->fill_xstats(skb
, dev
);
380 goto err_cancel_link
;
382 if (ops
->fill_info
) {
383 data
= nla_nest_start(skb
, IFLA_INFO_DATA
);
385 goto err_cancel_link
;
386 err
= ops
->fill_info(skb
, dev
);
388 goto err_cancel_data
;
389 nla_nest_end(skb
, data
);
392 nla_nest_end(skb
, linkinfo
);
396 nla_nest_cancel(skb
, data
);
398 nla_nest_cancel(skb
, linkinfo
);
403 static const int rtm_min
[RTM_NR_FAMILIES
] =
405 [RTM_FAM(RTM_NEWLINK
)] = NLMSG_LENGTH(sizeof(struct ifinfomsg
)),
406 [RTM_FAM(RTM_NEWADDR
)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg
)),
407 [RTM_FAM(RTM_NEWROUTE
)] = NLMSG_LENGTH(sizeof(struct rtmsg
)),
408 [RTM_FAM(RTM_NEWRULE
)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr
)),
409 [RTM_FAM(RTM_NEWQDISC
)] = NLMSG_LENGTH(sizeof(struct tcmsg
)),
410 [RTM_FAM(RTM_NEWTCLASS
)] = NLMSG_LENGTH(sizeof(struct tcmsg
)),
411 [RTM_FAM(RTM_NEWTFILTER
)] = NLMSG_LENGTH(sizeof(struct tcmsg
)),
412 [RTM_FAM(RTM_NEWACTION
)] = NLMSG_LENGTH(sizeof(struct tcamsg
)),
413 [RTM_FAM(RTM_GETMULTICAST
)] = NLMSG_LENGTH(sizeof(struct rtgenmsg
)),
414 [RTM_FAM(RTM_GETANYCAST
)] = NLMSG_LENGTH(sizeof(struct rtgenmsg
)),
417 static const int rta_max
[RTM_NR_FAMILIES
] =
419 [RTM_FAM(RTM_NEWLINK
)] = IFLA_MAX
,
420 [RTM_FAM(RTM_NEWADDR
)] = IFA_MAX
,
421 [RTM_FAM(RTM_NEWROUTE
)] = RTA_MAX
,
422 [RTM_FAM(RTM_NEWRULE
)] = FRA_MAX
,
423 [RTM_FAM(RTM_NEWQDISC
)] = TCA_MAX
,
424 [RTM_FAM(RTM_NEWTCLASS
)] = TCA_MAX
,
425 [RTM_FAM(RTM_NEWTFILTER
)] = TCA_MAX
,
426 [RTM_FAM(RTM_NEWACTION
)] = TCAA_MAX
,
429 void __rta_fill(struct sk_buff
*skb
, int attrtype
, int attrlen
, const void *data
)
432 int size
= RTA_LENGTH(attrlen
);
434 rta
= (struct rtattr
*)skb_put(skb
, RTA_ALIGN(size
));
435 rta
->rta_type
= attrtype
;
437 memcpy(RTA_DATA(rta
), data
, attrlen
);
438 memset(RTA_DATA(rta
) + attrlen
, 0, RTA_ALIGN(size
) - size
);
440 EXPORT_SYMBOL(__rta_fill
);
442 int rtnetlink_send(struct sk_buff
*skb
, struct net
*net
, u32 pid
, unsigned group
, int echo
)
444 struct sock
*rtnl
= net
->rtnl
;
447 NETLINK_CB(skb
).dst_group
= group
;
449 atomic_inc(&skb
->users
);
450 netlink_broadcast(rtnl
, skb
, pid
, group
, GFP_KERNEL
);
452 err
= netlink_unicast(rtnl
, skb
, pid
, MSG_DONTWAIT
);
456 int rtnl_unicast(struct sk_buff
*skb
, struct net
*net
, u32 pid
)
458 struct sock
*rtnl
= net
->rtnl
;
460 return nlmsg_unicast(rtnl
, skb
, pid
);
462 EXPORT_SYMBOL(rtnl_unicast
);
464 void rtnl_notify(struct sk_buff
*skb
, struct net
*net
, u32 pid
, u32 group
,
465 struct nlmsghdr
*nlh
, gfp_t flags
)
467 struct sock
*rtnl
= net
->rtnl
;
471 report
= nlmsg_report(nlh
);
473 nlmsg_notify(rtnl
, skb
, pid
, group
, report
, flags
);
475 EXPORT_SYMBOL(rtnl_notify
);
477 void rtnl_set_sk_err(struct net
*net
, u32 group
, int error
)
479 struct sock
*rtnl
= net
->rtnl
;
481 netlink_set_err(rtnl
, 0, group
, error
);
483 EXPORT_SYMBOL(rtnl_set_sk_err
);
485 int rtnetlink_put_metrics(struct sk_buff
*skb
, u32
*metrics
)
490 mx
= nla_nest_start(skb
, RTA_METRICS
);
494 for (i
= 0; i
< RTAX_MAX
; i
++) {
497 NLA_PUT_U32(skb
, i
+1, metrics
[i
]);
502 nla_nest_cancel(skb
, mx
);
506 return nla_nest_end(skb
, mx
);
509 nla_nest_cancel(skb
, mx
);
512 EXPORT_SYMBOL(rtnetlink_put_metrics
);
514 int rtnl_put_cacheinfo(struct sk_buff
*skb
, struct dst_entry
*dst
, u32 id
,
515 u32 ts
, u32 tsage
, long expires
, u32 error
)
517 struct rta_cacheinfo ci
= {
518 .rta_lastuse
= jiffies_to_clock_t(jiffies
- dst
->lastuse
),
519 .rta_used
= dst
->__use
,
520 .rta_clntref
= atomic_read(&(dst
->__refcnt
)),
528 ci
.rta_expires
= jiffies_to_clock_t(expires
);
530 return nla_put(skb
, RTA_CACHEINFO
, sizeof(ci
), &ci
);
532 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo
);
534 static void set_operstate(struct net_device
*dev
, unsigned char transition
)
536 unsigned char operstate
= dev
->operstate
;
538 switch (transition
) {
540 if ((operstate
== IF_OPER_DORMANT
||
541 operstate
== IF_OPER_UNKNOWN
) &&
543 operstate
= IF_OPER_UP
;
546 case IF_OPER_DORMANT
:
547 if (operstate
== IF_OPER_UP
||
548 operstate
== IF_OPER_UNKNOWN
)
549 operstate
= IF_OPER_DORMANT
;
553 if (dev
->operstate
!= operstate
) {
554 write_lock_bh(&dev_base_lock
);
555 dev
->operstate
= operstate
;
556 write_unlock_bh(&dev_base_lock
);
557 netdev_state_change(dev
);
561 static unsigned int rtnl_dev_combine_flags(const struct net_device
*dev
,
562 const struct ifinfomsg
*ifm
)
564 unsigned int flags
= ifm
->ifi_flags
;
566 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
568 flags
= (flags
& ifm
->ifi_change
) |
569 (dev
->flags
& ~ifm
->ifi_change
);
574 static void copy_rtnl_link_stats(struct rtnl_link_stats
*a
,
575 const struct rtnl_link_stats64
*b
)
577 a
->rx_packets
= b
->rx_packets
;
578 a
->tx_packets
= b
->tx_packets
;
579 a
->rx_bytes
= b
->rx_bytes
;
580 a
->tx_bytes
= b
->tx_bytes
;
581 a
->rx_errors
= b
->rx_errors
;
582 a
->tx_errors
= b
->tx_errors
;
583 a
->rx_dropped
= b
->rx_dropped
;
584 a
->tx_dropped
= b
->tx_dropped
;
586 a
->multicast
= b
->multicast
;
587 a
->collisions
= b
->collisions
;
589 a
->rx_length_errors
= b
->rx_length_errors
;
590 a
->rx_over_errors
= b
->rx_over_errors
;
591 a
->rx_crc_errors
= b
->rx_crc_errors
;
592 a
->rx_frame_errors
= b
->rx_frame_errors
;
593 a
->rx_fifo_errors
= b
->rx_fifo_errors
;
594 a
->rx_missed_errors
= b
->rx_missed_errors
;
596 a
->tx_aborted_errors
= b
->tx_aborted_errors
;
597 a
->tx_carrier_errors
= b
->tx_carrier_errors
;
598 a
->tx_fifo_errors
= b
->tx_fifo_errors
;
599 a
->tx_heartbeat_errors
= b
->tx_heartbeat_errors
;
600 a
->tx_window_errors
= b
->tx_window_errors
;
602 a
->rx_compressed
= b
->rx_compressed
;
603 a
->tx_compressed
= b
->tx_compressed
;
606 static void copy_rtnl_link_stats64(void *v
, const struct rtnl_link_stats64
*b
)
608 memcpy(v
, b
, sizeof(*b
));
612 static inline int rtnl_vfinfo_size(const struct net_device
*dev
)
614 if (dev
->dev
.parent
&& dev_is_pci(dev
->dev
.parent
)) {
616 int num_vfs
= dev_num_vf(dev
->dev
.parent
);
617 size_t size
= nla_total_size(sizeof(struct nlattr
));
618 size
+= nla_total_size(num_vfs
* sizeof(struct nlattr
));
620 (nla_total_size(sizeof(struct ifla_vf_mac
)) +
621 nla_total_size(sizeof(struct ifla_vf_vlan
)) +
622 nla_total_size(sizeof(struct ifla_vf_tx_rate
)));
628 static size_t rtnl_port_size(const struct net_device
*dev
)
630 size_t port_size
= nla_total_size(4) /* PORT_VF */
631 + nla_total_size(PORT_PROFILE_MAX
) /* PORT_PROFILE */
632 + nla_total_size(sizeof(struct ifla_port_vsi
))
634 + nla_total_size(PORT_UUID_MAX
) /* PORT_INSTANCE_UUID */
635 + nla_total_size(PORT_UUID_MAX
) /* PORT_HOST_UUID */
636 + nla_total_size(1) /* PROT_VDP_REQUEST */
637 + nla_total_size(2); /* PORT_VDP_RESPONSE */
638 size_t vf_ports_size
= nla_total_size(sizeof(struct nlattr
));
639 size_t vf_port_size
= nla_total_size(sizeof(struct nlattr
))
641 size_t port_self_size
= nla_total_size(sizeof(struct nlattr
))
644 if (!dev
->netdev_ops
->ndo_get_vf_port
|| !dev
->dev
.parent
)
646 if (dev_num_vf(dev
->dev
.parent
))
647 return port_self_size
+ vf_ports_size
+
648 vf_port_size
* dev_num_vf(dev
->dev
.parent
);
650 return port_self_size
;
653 static noinline
size_t if_nlmsg_size(const struct net_device
*dev
)
655 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
656 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
657 + nla_total_size(IFALIASZ
) /* IFLA_IFALIAS */
658 + nla_total_size(IFNAMSIZ
) /* IFLA_QDISC */
659 + nla_total_size(sizeof(struct rtnl_link_ifmap
))
660 + nla_total_size(sizeof(struct rtnl_link_stats
))
661 + nla_total_size(sizeof(struct rtnl_link_stats64
))
662 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
663 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_BROADCAST */
664 + nla_total_size(4) /* IFLA_TXQLEN */
665 + nla_total_size(4) /* IFLA_WEIGHT */
666 + nla_total_size(4) /* IFLA_MTU */
667 + nla_total_size(4) /* IFLA_LINK */
668 + nla_total_size(4) /* IFLA_MASTER */
669 + nla_total_size(1) /* IFLA_OPERSTATE */
670 + nla_total_size(1) /* IFLA_LINKMODE */
671 + nla_total_size(4) /* IFLA_NUM_VF */
672 + rtnl_vfinfo_size(dev
) /* IFLA_VFINFO_LIST */
673 + rtnl_port_size(dev
) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
674 + rtnl_link_get_size(dev
); /* IFLA_LINKINFO */
677 static int rtnl_vf_ports_fill(struct sk_buff
*skb
, struct net_device
*dev
)
679 struct nlattr
*vf_ports
;
680 struct nlattr
*vf_port
;
684 vf_ports
= nla_nest_start(skb
, IFLA_VF_PORTS
);
688 for (vf
= 0; vf
< dev_num_vf(dev
->dev
.parent
); vf
++) {
689 vf_port
= nla_nest_start(skb
, IFLA_VF_PORT
);
691 goto nla_put_failure
;
692 NLA_PUT_U32(skb
, IFLA_PORT_VF
, vf
);
693 err
= dev
->netdev_ops
->ndo_get_vf_port(dev
, vf
, skb
);
694 if (err
== -EMSGSIZE
)
695 goto nla_put_failure
;
697 nla_nest_cancel(skb
, vf_port
);
700 nla_nest_end(skb
, vf_port
);
703 nla_nest_end(skb
, vf_ports
);
708 nla_nest_cancel(skb
, vf_ports
);
712 static int rtnl_port_self_fill(struct sk_buff
*skb
, struct net_device
*dev
)
714 struct nlattr
*port_self
;
717 port_self
= nla_nest_start(skb
, IFLA_PORT_SELF
);
721 err
= dev
->netdev_ops
->ndo_get_vf_port(dev
, PORT_SELF_VF
, skb
);
723 nla_nest_cancel(skb
, port_self
);
724 return (err
== -EMSGSIZE
) ? err
: 0;
727 nla_nest_end(skb
, port_self
);
732 static int rtnl_port_fill(struct sk_buff
*skb
, struct net_device
*dev
)
736 if (!dev
->netdev_ops
->ndo_get_vf_port
|| !dev
->dev
.parent
)
739 err
= rtnl_port_self_fill(skb
, dev
);
743 if (dev_num_vf(dev
->dev
.parent
)) {
744 err
= rtnl_vf_ports_fill(skb
, dev
);
752 static int rtnl_fill_ifinfo(struct sk_buff
*skb
, struct net_device
*dev
,
753 int type
, u32 pid
, u32 seq
, u32 change
,
756 struct ifinfomsg
*ifm
;
757 struct nlmsghdr
*nlh
;
758 struct rtnl_link_stats64 temp
;
759 const struct rtnl_link_stats64
*stats
;
762 nlh
= nlmsg_put(skb
, pid
, seq
, type
, sizeof(*ifm
), flags
);
766 ifm
= nlmsg_data(nlh
);
767 ifm
->ifi_family
= AF_UNSPEC
;
769 ifm
->ifi_type
= dev
->type
;
770 ifm
->ifi_index
= dev
->ifindex
;
771 ifm
->ifi_flags
= dev_get_flags(dev
);
772 ifm
->ifi_change
= change
;
774 NLA_PUT_STRING(skb
, IFLA_IFNAME
, dev
->name
);
775 NLA_PUT_U32(skb
, IFLA_TXQLEN
, dev
->tx_queue_len
);
776 NLA_PUT_U8(skb
, IFLA_OPERSTATE
,
777 netif_running(dev
) ? dev
->operstate
: IF_OPER_DOWN
);
778 NLA_PUT_U8(skb
, IFLA_LINKMODE
, dev
->link_mode
);
779 NLA_PUT_U32(skb
, IFLA_MTU
, dev
->mtu
);
781 if (dev
->ifindex
!= dev
->iflink
)
782 NLA_PUT_U32(skb
, IFLA_LINK
, dev
->iflink
);
785 NLA_PUT_U32(skb
, IFLA_MASTER
, dev
->master
->ifindex
);
788 NLA_PUT_STRING(skb
, IFLA_QDISC
, dev
->qdisc
->ops
->id
);
791 NLA_PUT_STRING(skb
, IFLA_IFALIAS
, dev
->ifalias
);
794 struct rtnl_link_ifmap map
= {
795 .mem_start
= dev
->mem_start
,
796 .mem_end
= dev
->mem_end
,
797 .base_addr
= dev
->base_addr
,
800 .port
= dev
->if_port
,
802 NLA_PUT(skb
, IFLA_MAP
, sizeof(map
), &map
);
806 NLA_PUT(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
);
807 NLA_PUT(skb
, IFLA_BROADCAST
, dev
->addr_len
, dev
->broadcast
);
810 attr
= nla_reserve(skb
, IFLA_STATS
,
811 sizeof(struct rtnl_link_stats
));
813 goto nla_put_failure
;
815 stats
= dev_get_stats(dev
, &temp
);
816 copy_rtnl_link_stats(nla_data(attr
), stats
);
818 attr
= nla_reserve(skb
, IFLA_STATS64
,
819 sizeof(struct rtnl_link_stats64
));
821 goto nla_put_failure
;
822 copy_rtnl_link_stats64(nla_data(attr
), stats
);
825 NLA_PUT_U32(skb
, IFLA_NUM_VF
, dev_num_vf(dev
->dev
.parent
));
827 if (dev
->netdev_ops
->ndo_get_vf_config
&& dev
->dev
.parent
) {
830 struct nlattr
*vfinfo
, *vf
;
831 int num_vfs
= dev_num_vf(dev
->dev
.parent
);
833 vfinfo
= nla_nest_start(skb
, IFLA_VFINFO_LIST
);
835 goto nla_put_failure
;
836 for (i
= 0; i
< num_vfs
; i
++) {
837 struct ifla_vf_info ivi
;
838 struct ifla_vf_mac vf_mac
;
839 struct ifla_vf_vlan vf_vlan
;
840 struct ifla_vf_tx_rate vf_tx_rate
;
841 if (dev
->netdev_ops
->ndo_get_vf_config(dev
, i
, &ivi
))
843 vf_mac
.vf
= vf_vlan
.vf
= vf_tx_rate
.vf
= ivi
.vf
;
844 memcpy(vf_mac
.mac
, ivi
.mac
, sizeof(ivi
.mac
));
845 vf_vlan
.vlan
= ivi
.vlan
;
846 vf_vlan
.qos
= ivi
.qos
;
847 vf_tx_rate
.rate
= ivi
.tx_rate
;
848 vf
= nla_nest_start(skb
, IFLA_VF_INFO
);
850 nla_nest_cancel(skb
, vfinfo
);
851 goto nla_put_failure
;
853 NLA_PUT(skb
, IFLA_VF_MAC
, sizeof(vf_mac
), &vf_mac
);
854 NLA_PUT(skb
, IFLA_VF_VLAN
, sizeof(vf_vlan
), &vf_vlan
);
855 NLA_PUT(skb
, IFLA_VF_TX_RATE
, sizeof(vf_tx_rate
), &vf_tx_rate
);
856 nla_nest_end(skb
, vf
);
858 nla_nest_end(skb
, vfinfo
);
861 if (rtnl_port_fill(skb
, dev
))
862 goto nla_put_failure
;
864 if (dev
->rtnl_link_ops
) {
865 if (rtnl_link_fill(skb
, dev
) < 0)
866 goto nla_put_failure
;
869 return nlmsg_end(skb
, nlh
);
872 nlmsg_cancel(skb
, nlh
);
876 static int rtnl_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
878 struct net
*net
= sock_net(skb
->sk
);
881 struct net_device
*dev
;
882 struct hlist_head
*head
;
883 struct hlist_node
*node
;
888 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
890 head
= &net
->dev_index_head
[h
];
891 hlist_for_each_entry(dev
, node
, head
, index_hlist
) {
894 if (rtnl_fill_ifinfo(skb
, dev
, RTM_NEWLINK
,
895 NETLINK_CB(cb
->skb
).pid
,
896 cb
->nlh
->nlmsg_seq
, 0,
910 const struct nla_policy ifla_policy
[IFLA_MAX
+1] = {
911 [IFLA_IFNAME
] = { .type
= NLA_STRING
, .len
= IFNAMSIZ
-1 },
912 [IFLA_ADDRESS
] = { .type
= NLA_BINARY
, .len
= MAX_ADDR_LEN
},
913 [IFLA_BROADCAST
] = { .type
= NLA_BINARY
, .len
= MAX_ADDR_LEN
},
914 [IFLA_MAP
] = { .len
= sizeof(struct rtnl_link_ifmap
) },
915 [IFLA_MTU
] = { .type
= NLA_U32
},
916 [IFLA_LINK
] = { .type
= NLA_U32
},
917 [IFLA_TXQLEN
] = { .type
= NLA_U32
},
918 [IFLA_WEIGHT
] = { .type
= NLA_U32
},
919 [IFLA_OPERSTATE
] = { .type
= NLA_U8
},
920 [IFLA_LINKMODE
] = { .type
= NLA_U8
},
921 [IFLA_LINKINFO
] = { .type
= NLA_NESTED
},
922 [IFLA_NET_NS_PID
] = { .type
= NLA_U32
},
923 [IFLA_IFALIAS
] = { .type
= NLA_STRING
, .len
= IFALIASZ
-1 },
924 [IFLA_VFINFO_LIST
] = {. type
= NLA_NESTED
},
925 [IFLA_VF_PORTS
] = { .type
= NLA_NESTED
},
926 [IFLA_PORT_SELF
] = { .type
= NLA_NESTED
},
928 EXPORT_SYMBOL(ifla_policy
);
930 static const struct nla_policy ifla_info_policy
[IFLA_INFO_MAX
+1] = {
931 [IFLA_INFO_KIND
] = { .type
= NLA_STRING
},
932 [IFLA_INFO_DATA
] = { .type
= NLA_NESTED
},
935 static const struct nla_policy ifla_vfinfo_policy
[IFLA_VF_INFO_MAX
+1] = {
936 [IFLA_VF_INFO
] = { .type
= NLA_NESTED
},
939 static const struct nla_policy ifla_vf_policy
[IFLA_VF_MAX
+1] = {
940 [IFLA_VF_MAC
] = { .type
= NLA_BINARY
,
941 .len
= sizeof(struct ifla_vf_mac
) },
942 [IFLA_VF_VLAN
] = { .type
= NLA_BINARY
,
943 .len
= sizeof(struct ifla_vf_vlan
) },
944 [IFLA_VF_TX_RATE
] = { .type
= NLA_BINARY
,
945 .len
= sizeof(struct ifla_vf_tx_rate
) },
948 static const struct nla_policy ifla_port_policy
[IFLA_PORT_MAX
+1] = {
949 [IFLA_PORT_VF
] = { .type
= NLA_U32
},
950 [IFLA_PORT_PROFILE
] = { .type
= NLA_STRING
,
951 .len
= PORT_PROFILE_MAX
},
952 [IFLA_PORT_VSI_TYPE
] = { .type
= NLA_BINARY
,
953 .len
= sizeof(struct ifla_port_vsi
)},
954 [IFLA_PORT_INSTANCE_UUID
] = { .type
= NLA_BINARY
,
955 .len
= PORT_UUID_MAX
},
956 [IFLA_PORT_HOST_UUID
] = { .type
= NLA_STRING
,
957 .len
= PORT_UUID_MAX
},
958 [IFLA_PORT_REQUEST
] = { .type
= NLA_U8
, },
959 [IFLA_PORT_RESPONSE
] = { .type
= NLA_U16
, },
962 struct net
*rtnl_link_get_net(struct net
*src_net
, struct nlattr
*tb
[])
965 /* Examine the link attributes and figure out which
966 * network namespace we are talking about.
968 if (tb
[IFLA_NET_NS_PID
])
969 net
= get_net_ns_by_pid(nla_get_u32(tb
[IFLA_NET_NS_PID
]));
971 net
= get_net(src_net
);
974 EXPORT_SYMBOL(rtnl_link_get_net
);
976 static int validate_linkmsg(struct net_device
*dev
, struct nlattr
*tb
[])
979 if (tb
[IFLA_ADDRESS
] &&
980 nla_len(tb
[IFLA_ADDRESS
]) < dev
->addr_len
)
983 if (tb
[IFLA_BROADCAST
] &&
984 nla_len(tb
[IFLA_BROADCAST
]) < dev
->addr_len
)
991 static int do_setvfinfo(struct net_device
*dev
, struct nlattr
*attr
)
993 int rem
, err
= -EINVAL
;
995 const struct net_device_ops
*ops
= dev
->netdev_ops
;
997 nla_for_each_nested(vf
, attr
, rem
) {
998 switch (nla_type(vf
)) {
1000 struct ifla_vf_mac
*ivm
;
1003 if (ops
->ndo_set_vf_mac
)
1004 err
= ops
->ndo_set_vf_mac(dev
, ivm
->vf
,
1008 case IFLA_VF_VLAN
: {
1009 struct ifla_vf_vlan
*ivv
;
1012 if (ops
->ndo_set_vf_vlan
)
1013 err
= ops
->ndo_set_vf_vlan(dev
, ivv
->vf
,
1018 case IFLA_VF_TX_RATE
: {
1019 struct ifla_vf_tx_rate
*ivt
;
1022 if (ops
->ndo_set_vf_tx_rate
)
1023 err
= ops
->ndo_set_vf_tx_rate(dev
, ivt
->vf
,
1037 static int do_setlink(struct net_device
*dev
, struct ifinfomsg
*ifm
,
1038 struct nlattr
**tb
, char *ifname
, int modified
)
1040 const struct net_device_ops
*ops
= dev
->netdev_ops
;
1041 int send_addr_notify
= 0;
1044 if (tb
[IFLA_NET_NS_PID
]) {
1045 struct net
*net
= rtnl_link_get_net(dev_net(dev
), tb
);
1050 err
= dev_change_net_namespace(dev
, net
, ifname
);
1058 struct rtnl_link_ifmap
*u_map
;
1061 if (!ops
->ndo_set_config
) {
1066 if (!netif_device_present(dev
)) {
1071 u_map
= nla_data(tb
[IFLA_MAP
]);
1072 k_map
.mem_start
= (unsigned long) u_map
->mem_start
;
1073 k_map
.mem_end
= (unsigned long) u_map
->mem_end
;
1074 k_map
.base_addr
= (unsigned short) u_map
->base_addr
;
1075 k_map
.irq
= (unsigned char) u_map
->irq
;
1076 k_map
.dma
= (unsigned char) u_map
->dma
;
1077 k_map
.port
= (unsigned char) u_map
->port
;
1079 err
= ops
->ndo_set_config(dev
, &k_map
);
1086 if (tb
[IFLA_ADDRESS
]) {
1087 struct sockaddr
*sa
;
1090 if (!ops
->ndo_set_mac_address
) {
1095 if (!netif_device_present(dev
)) {
1100 len
= sizeof(sa_family_t
) + dev
->addr_len
;
1101 sa
= kmalloc(len
, GFP_KERNEL
);
1106 sa
->sa_family
= dev
->type
;
1107 memcpy(sa
->sa_data
, nla_data(tb
[IFLA_ADDRESS
]),
1109 err
= ops
->ndo_set_mac_address(dev
, sa
);
1113 send_addr_notify
= 1;
1118 err
= dev_set_mtu(dev
, nla_get_u32(tb
[IFLA_MTU
]));
1125 * Interface selected by interface index but interface
1126 * name provided implies that a name change has been
1129 if (ifm
->ifi_index
> 0 && ifname
[0]) {
1130 err
= dev_change_name(dev
, ifname
);
1136 if (tb
[IFLA_IFALIAS
]) {
1137 err
= dev_set_alias(dev
, nla_data(tb
[IFLA_IFALIAS
]),
1138 nla_len(tb
[IFLA_IFALIAS
]));
1144 if (tb
[IFLA_BROADCAST
]) {
1145 nla_memcpy(dev
->broadcast
, tb
[IFLA_BROADCAST
], dev
->addr_len
);
1146 send_addr_notify
= 1;
1149 if (ifm
->ifi_flags
|| ifm
->ifi_change
) {
1150 err
= dev_change_flags(dev
, rtnl_dev_combine_flags(dev
, ifm
));
1155 if (tb
[IFLA_TXQLEN
])
1156 dev
->tx_queue_len
= nla_get_u32(tb
[IFLA_TXQLEN
]);
1158 if (tb
[IFLA_OPERSTATE
])
1159 set_operstate(dev
, nla_get_u8(tb
[IFLA_OPERSTATE
]));
1161 if (tb
[IFLA_LINKMODE
]) {
1162 write_lock_bh(&dev_base_lock
);
1163 dev
->link_mode
= nla_get_u8(tb
[IFLA_LINKMODE
]);
1164 write_unlock_bh(&dev_base_lock
);
1167 if (tb
[IFLA_VFINFO_LIST
]) {
1168 struct nlattr
*attr
;
1170 nla_for_each_nested(attr
, tb
[IFLA_VFINFO_LIST
], rem
) {
1171 if (nla_type(attr
) != IFLA_VF_INFO
) {
1175 err
= do_setvfinfo(dev
, attr
);
1183 if (tb
[IFLA_VF_PORTS
]) {
1184 struct nlattr
*port
[IFLA_PORT_MAX
+1];
1185 struct nlattr
*attr
;
1190 if (!ops
->ndo_set_vf_port
)
1193 nla_for_each_nested(attr
, tb
[IFLA_VF_PORTS
], rem
) {
1194 if (nla_type(attr
) != IFLA_VF_PORT
)
1196 err
= nla_parse_nested(port
, IFLA_PORT_MAX
,
1197 attr
, ifla_port_policy
);
1200 if (!port
[IFLA_PORT_VF
]) {
1204 vf
= nla_get_u32(port
[IFLA_PORT_VF
]);
1205 err
= ops
->ndo_set_vf_port(dev
, vf
, port
);
1213 if (tb
[IFLA_PORT_SELF
]) {
1214 struct nlattr
*port
[IFLA_PORT_MAX
+1];
1216 err
= nla_parse_nested(port
, IFLA_PORT_MAX
,
1217 tb
[IFLA_PORT_SELF
], ifla_port_policy
);
1222 if (ops
->ndo_set_vf_port
)
1223 err
= ops
->ndo_set_vf_port(dev
, PORT_SELF_VF
, port
);
1231 if (err
< 0 && modified
&& net_ratelimit())
1232 printk(KERN_WARNING
"A link change request failed with "
1233 "some changes comitted already. Interface %s may "
1234 "have been left with an inconsistent configuration, "
1235 "please check.\n", dev
->name
);
1237 if (send_addr_notify
)
1238 call_netdevice_notifiers(NETDEV_CHANGEADDR
, dev
);
1242 static int rtnl_setlink(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
1244 struct net
*net
= sock_net(skb
->sk
);
1245 struct ifinfomsg
*ifm
;
1246 struct net_device
*dev
;
1248 struct nlattr
*tb
[IFLA_MAX
+1];
1249 char ifname
[IFNAMSIZ
];
1251 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFLA_MAX
, ifla_policy
);
1255 if (tb
[IFLA_IFNAME
])
1256 nla_strlcpy(ifname
, tb
[IFLA_IFNAME
], IFNAMSIZ
);
1261 ifm
= nlmsg_data(nlh
);
1262 if (ifm
->ifi_index
> 0)
1263 dev
= __dev_get_by_index(net
, ifm
->ifi_index
);
1264 else if (tb
[IFLA_IFNAME
])
1265 dev
= __dev_get_by_name(net
, ifname
);
1274 err
= validate_linkmsg(dev
, tb
);
1278 err
= do_setlink(dev
, ifm
, tb
, ifname
, 0);
1283 static int rtnl_dellink(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
1285 struct net
*net
= sock_net(skb
->sk
);
1286 const struct rtnl_link_ops
*ops
;
1287 struct net_device
*dev
;
1288 struct ifinfomsg
*ifm
;
1289 char ifname
[IFNAMSIZ
];
1290 struct nlattr
*tb
[IFLA_MAX
+1];
1293 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFLA_MAX
, ifla_policy
);
1297 if (tb
[IFLA_IFNAME
])
1298 nla_strlcpy(ifname
, tb
[IFLA_IFNAME
], IFNAMSIZ
);
1300 ifm
= nlmsg_data(nlh
);
1301 if (ifm
->ifi_index
> 0)
1302 dev
= __dev_get_by_index(net
, ifm
->ifi_index
);
1303 else if (tb
[IFLA_IFNAME
])
1304 dev
= __dev_get_by_name(net
, ifname
);
1311 ops
= dev
->rtnl_link_ops
;
1315 ops
->dellink(dev
, NULL
);
1319 int rtnl_configure_link(struct net_device
*dev
, const struct ifinfomsg
*ifm
)
1321 unsigned int old_flags
;
1324 old_flags
= dev
->flags
;
1325 if (ifm
&& (ifm
->ifi_flags
|| ifm
->ifi_change
)) {
1326 err
= __dev_change_flags(dev
, rtnl_dev_combine_flags(dev
, ifm
));
1331 dev
->rtnl_link_state
= RTNL_LINK_INITIALIZED
;
1332 rtmsg_ifinfo(RTM_NEWLINK
, dev
, ~0U);
1334 __dev_notify_flags(dev
, old_flags
);
1337 EXPORT_SYMBOL(rtnl_configure_link
);
1339 struct net_device
*rtnl_create_link(struct net
*src_net
, struct net
*net
,
1340 char *ifname
, const struct rtnl_link_ops
*ops
, struct nlattr
*tb
[])
1343 struct net_device
*dev
;
1344 unsigned int num_queues
= 1;
1345 unsigned int real_num_queues
= 1;
1347 if (ops
->get_tx_queues
) {
1348 err
= ops
->get_tx_queues(src_net
, tb
, &num_queues
,
1354 dev
= alloc_netdev_mq(ops
->priv_size
, ifname
, ops
->setup
, num_queues
);
1358 dev_net_set(dev
, net
);
1359 dev
->rtnl_link_ops
= ops
;
1360 dev
->rtnl_link_state
= RTNL_LINK_INITIALIZING
;
1361 dev
->real_num_tx_queues
= real_num_queues
;
1363 if (strchr(dev
->name
, '%')) {
1364 err
= dev_alloc_name(dev
, dev
->name
);
1370 dev
->mtu
= nla_get_u32(tb
[IFLA_MTU
]);
1371 if (tb
[IFLA_ADDRESS
])
1372 memcpy(dev
->dev_addr
, nla_data(tb
[IFLA_ADDRESS
]),
1373 nla_len(tb
[IFLA_ADDRESS
]));
1374 if (tb
[IFLA_BROADCAST
])
1375 memcpy(dev
->broadcast
, nla_data(tb
[IFLA_BROADCAST
]),
1376 nla_len(tb
[IFLA_BROADCAST
]));
1377 if (tb
[IFLA_TXQLEN
])
1378 dev
->tx_queue_len
= nla_get_u32(tb
[IFLA_TXQLEN
]);
1379 if (tb
[IFLA_OPERSTATE
])
1380 set_operstate(dev
, nla_get_u8(tb
[IFLA_OPERSTATE
]));
1381 if (tb
[IFLA_LINKMODE
])
1382 dev
->link_mode
= nla_get_u8(tb
[IFLA_LINKMODE
]);
1389 return ERR_PTR(err
);
1391 EXPORT_SYMBOL(rtnl_create_link
);
1393 static int rtnl_newlink(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
1395 struct net
*net
= sock_net(skb
->sk
);
1396 const struct rtnl_link_ops
*ops
;
1397 struct net_device
*dev
;
1398 struct ifinfomsg
*ifm
;
1399 char kind
[MODULE_NAME_LEN
];
1400 char ifname
[IFNAMSIZ
];
1401 struct nlattr
*tb
[IFLA_MAX
+1];
1402 struct nlattr
*linkinfo
[IFLA_INFO_MAX
+1];
1405 #ifdef CONFIG_MODULES
1408 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFLA_MAX
, ifla_policy
);
1412 if (tb
[IFLA_IFNAME
])
1413 nla_strlcpy(ifname
, tb
[IFLA_IFNAME
], IFNAMSIZ
);
1417 ifm
= nlmsg_data(nlh
);
1418 if (ifm
->ifi_index
> 0)
1419 dev
= __dev_get_by_index(net
, ifm
->ifi_index
);
1421 dev
= __dev_get_by_name(net
, ifname
);
1425 err
= validate_linkmsg(dev
, tb
);
1429 if (tb
[IFLA_LINKINFO
]) {
1430 err
= nla_parse_nested(linkinfo
, IFLA_INFO_MAX
,
1431 tb
[IFLA_LINKINFO
], ifla_info_policy
);
1435 memset(linkinfo
, 0, sizeof(linkinfo
));
1437 if (linkinfo
[IFLA_INFO_KIND
]) {
1438 nla_strlcpy(kind
, linkinfo
[IFLA_INFO_KIND
], sizeof(kind
));
1439 ops
= rtnl_link_ops_get(kind
);
1446 struct nlattr
*attr
[ops
? ops
->maxtype
+ 1 : 0], **data
= NULL
;
1447 struct net
*dest_net
;
1450 if (ops
->maxtype
&& linkinfo
[IFLA_INFO_DATA
]) {
1451 err
= nla_parse_nested(attr
, ops
->maxtype
,
1452 linkinfo
[IFLA_INFO_DATA
],
1458 if (ops
->validate
) {
1459 err
= ops
->validate(tb
, data
);
1468 if (nlh
->nlmsg_flags
& NLM_F_EXCL
)
1470 if (nlh
->nlmsg_flags
& NLM_F_REPLACE
)
1473 if (linkinfo
[IFLA_INFO_DATA
]) {
1474 if (!ops
|| ops
!= dev
->rtnl_link_ops
||
1478 err
= ops
->changelink(dev
, tb
, data
);
1484 return do_setlink(dev
, ifm
, tb
, ifname
, modified
);
1487 if (!(nlh
->nlmsg_flags
& NLM_F_CREATE
))
1492 if (tb
[IFLA_MAP
] || tb
[IFLA_MASTER
] || tb
[IFLA_PROTINFO
])
1496 #ifdef CONFIG_MODULES
1499 request_module("rtnl-link-%s", kind
);
1501 ops
= rtnl_link_ops_get(kind
);
1510 snprintf(ifname
, IFNAMSIZ
, "%s%%d", ops
->kind
);
1512 dest_net
= rtnl_link_get_net(net
, tb
);
1513 dev
= rtnl_create_link(net
, dest_net
, ifname
, ops
, tb
);
1517 else if (ops
->newlink
)
1518 err
= ops
->newlink(net
, dev
, tb
, data
);
1520 err
= register_netdevice(dev
);
1522 if (err
< 0 && !IS_ERR(dev
))
1527 err
= rtnl_configure_link(dev
, ifm
);
1529 unregister_netdevice(dev
);
1536 static int rtnl_getlink(struct sk_buff
*skb
, struct nlmsghdr
* nlh
, void *arg
)
1538 struct net
*net
= sock_net(skb
->sk
);
1539 struct ifinfomsg
*ifm
;
1540 char ifname
[IFNAMSIZ
];
1541 struct nlattr
*tb
[IFLA_MAX
+1];
1542 struct net_device
*dev
= NULL
;
1543 struct sk_buff
*nskb
;
1546 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFLA_MAX
, ifla_policy
);
1550 if (tb
[IFLA_IFNAME
])
1551 nla_strlcpy(ifname
, tb
[IFLA_IFNAME
], IFNAMSIZ
);
1553 ifm
= nlmsg_data(nlh
);
1554 if (ifm
->ifi_index
> 0)
1555 dev
= __dev_get_by_index(net
, ifm
->ifi_index
);
1556 else if (tb
[IFLA_IFNAME
])
1557 dev
= __dev_get_by_name(net
, ifname
);
1564 nskb
= nlmsg_new(if_nlmsg_size(dev
), GFP_KERNEL
);
1568 err
= rtnl_fill_ifinfo(nskb
, dev
, RTM_NEWLINK
, NETLINK_CB(skb
).pid
,
1569 nlh
->nlmsg_seq
, 0, 0);
1571 /* -EMSGSIZE implies BUG in if_nlmsg_size */
1572 WARN_ON(err
== -EMSGSIZE
);
1575 err
= rtnl_unicast(nskb
, net
, NETLINK_CB(skb
).pid
);
1580 static int rtnl_dump_all(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1583 int s_idx
= cb
->family
;
1587 for (idx
= 1; idx
<= RTNL_FAMILY_MAX
; idx
++) {
1588 int type
= cb
->nlh
->nlmsg_type
-RTM_BASE
;
1589 if (idx
< s_idx
|| idx
== PF_PACKET
)
1591 if (rtnl_msg_handlers
[idx
] == NULL
||
1592 rtnl_msg_handlers
[idx
][type
].dumpit
== NULL
)
1595 memset(&cb
->args
[0], 0, sizeof(cb
->args
));
1596 if (rtnl_msg_handlers
[idx
][type
].dumpit(skb
, cb
))
1604 void rtmsg_ifinfo(int type
, struct net_device
*dev
, unsigned change
)
1606 struct net
*net
= dev_net(dev
);
1607 struct sk_buff
*skb
;
1610 skb
= nlmsg_new(if_nlmsg_size(dev
), GFP_KERNEL
);
1614 err
= rtnl_fill_ifinfo(skb
, dev
, type
, 0, 0, change
, 0);
1616 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
1617 WARN_ON(err
== -EMSGSIZE
);
1621 rtnl_notify(skb
, net
, 0, RTNLGRP_LINK
, NULL
, GFP_KERNEL
);
1625 rtnl_set_sk_err(net
, RTNLGRP_LINK
, err
);
1628 /* Protected by RTNL sempahore. */
1629 static struct rtattr
**rta_buf
;
1630 static int rtattr_max
;
1632 /* Process one rtnetlink message. */
1634 static int rtnetlink_rcv_msg(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
1636 struct net
*net
= sock_net(skb
->sk
);
1637 rtnl_doit_func doit
;
1644 type
= nlh
->nlmsg_type
;
1650 /* All the messages must have at least 1 byte length */
1651 if (nlh
->nlmsg_len
< NLMSG_LENGTH(sizeof(struct rtgenmsg
)))
1654 family
= ((struct rtgenmsg
*)NLMSG_DATA(nlh
))->rtgen_family
;
1658 if (kind
!= 2 && security_netlink_recv(skb
, CAP_NET_ADMIN
))
1661 if (kind
== 2 && nlh
->nlmsg_flags
&NLM_F_DUMP
) {
1663 rtnl_dumpit_func dumpit
;
1665 dumpit
= rtnl_get_dumpit(family
, type
);
1671 err
= netlink_dump_start(rtnl
, skb
, nlh
, dumpit
, NULL
);
1676 memset(rta_buf
, 0, (rtattr_max
* sizeof(struct rtattr
*)));
1678 min_len
= rtm_min
[sz_idx
];
1679 if (nlh
->nlmsg_len
< min_len
)
1682 if (nlh
->nlmsg_len
> min_len
) {
1683 int attrlen
= nlh
->nlmsg_len
- NLMSG_ALIGN(min_len
);
1684 struct rtattr
*attr
= (void *)nlh
+ NLMSG_ALIGN(min_len
);
1686 while (RTA_OK(attr
, attrlen
)) {
1687 unsigned flavor
= attr
->rta_type
;
1689 if (flavor
> rta_max
[sz_idx
])
1691 rta_buf
[flavor
-1] = attr
;
1693 attr
= RTA_NEXT(attr
, attrlen
);
1697 doit
= rtnl_get_doit(family
, type
);
1701 return doit(skb
, nlh
, (void *)&rta_buf
[0]);
1704 static void rtnetlink_rcv(struct sk_buff
*skb
)
1707 netlink_rcv_skb(skb
, &rtnetlink_rcv_msg
);
1711 static int rtnetlink_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
1713 struct net_device
*dev
= ptr
;
1719 case NETDEV_POST_INIT
:
1720 case NETDEV_REGISTER
:
1722 case NETDEV_PRE_TYPE_CHANGE
:
1723 case NETDEV_GOING_DOWN
:
1724 case NETDEV_UNREGISTER
:
1725 case NETDEV_UNREGISTER_BATCH
:
1728 rtmsg_ifinfo(RTM_NEWLINK
, dev
, 0);
1734 static struct notifier_block rtnetlink_dev_notifier
= {
1735 .notifier_call
= rtnetlink_event
,
1739 static int __net_init
rtnetlink_net_init(struct net
*net
)
1742 sk
= netlink_kernel_create(net
, NETLINK_ROUTE
, RTNLGRP_MAX
,
1743 rtnetlink_rcv
, &rtnl_mutex
, THIS_MODULE
);
1750 static void __net_exit
rtnetlink_net_exit(struct net
*net
)
1752 netlink_kernel_release(net
->rtnl
);
1756 static struct pernet_operations rtnetlink_net_ops
= {
1757 .init
= rtnetlink_net_init
,
1758 .exit
= rtnetlink_net_exit
,
1761 void __init
rtnetlink_init(void)
1766 for (i
= 0; i
< ARRAY_SIZE(rta_max
); i
++)
1767 if (rta_max
[i
] > rtattr_max
)
1768 rtattr_max
= rta_max
[i
];
1769 rta_buf
= kmalloc(rtattr_max
* sizeof(struct rtattr
*), GFP_KERNEL
);
1771 panic("rtnetlink_init: cannot allocate rta_buf\n");
1773 if (register_pernet_subsys(&rtnetlink_net_ops
))
1774 panic("rtnetlink_init: cannot initialize rtnetlink\n");
1776 netlink_set_nonroot(NETLINK_ROUTE
, NL_NONROOT_RECV
);
1777 register_netdevice_notifier(&rtnetlink_dev_notifier
);
1779 rtnl_register(PF_UNSPEC
, RTM_GETLINK
, rtnl_getlink
, rtnl_dump_ifinfo
);
1780 rtnl_register(PF_UNSPEC
, RTM_SETLINK
, rtnl_setlink
, NULL
);
1781 rtnl_register(PF_UNSPEC
, RTM_NEWLINK
, rtnl_newlink
, NULL
);
1782 rtnl_register(PF_UNSPEC
, RTM_DELLINK
, rtnl_dellink
, NULL
);
1784 rtnl_register(PF_UNSPEC
, RTM_GETADDR
, NULL
, rtnl_dump_all
);
1785 rtnl_register(PF_UNSPEC
, RTM_GETROUTE
, NULL
, rtnl_dump_all
);