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>
42 #include <linux/inet.h>
43 #include <linux/netdevice.h>
45 #include <net/protocol.h>
47 #include <net/route.h>
50 #include <net/pkt_sched.h>
51 #include <net/fib_rules.h>
52 #include <net/rtnetlink.h>
53 #include <net/net_namespace.h>
57 rtnl_dumpit_func dumpit
;
58 rtnl_calcit_func calcit
;
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
;
147 static rtnl_calcit_func
rtnl_get_calcit(int protocol
, int msgindex
)
149 struct rtnl_link
*tab
;
151 if (protocol
<= RTNL_FAMILY_MAX
)
152 tab
= rtnl_msg_handlers
[protocol
];
156 if (tab
== NULL
|| tab
[msgindex
].calcit
== NULL
)
157 tab
= rtnl_msg_handlers
[PF_UNSPEC
];
159 return tab
? tab
[msgindex
].calcit
: NULL
;
163 * __rtnl_register - Register a rtnetlink message type
164 * @protocol: Protocol family or PF_UNSPEC
165 * @msgtype: rtnetlink message type
166 * @doit: Function pointer called for each request message
167 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
168 * @calcit: Function pointer to calc size of dump message
170 * Registers the specified function pointers (at least one of them has
171 * to be non-NULL) to be called whenever a request message for the
172 * specified protocol family and message type is received.
174 * The special protocol family PF_UNSPEC may be used to define fallback
175 * function pointers for the case when no entry for the specific protocol
178 * Returns 0 on success or a negative error code.
180 int __rtnl_register(int protocol
, int msgtype
,
181 rtnl_doit_func doit
, rtnl_dumpit_func dumpit
,
182 rtnl_calcit_func calcit
)
184 struct rtnl_link
*tab
;
187 BUG_ON(protocol
< 0 || protocol
> RTNL_FAMILY_MAX
);
188 msgindex
= rtm_msgindex(msgtype
);
190 tab
= rtnl_msg_handlers
[protocol
];
192 tab
= kcalloc(RTM_NR_MSGTYPES
, sizeof(*tab
), GFP_KERNEL
);
196 rtnl_msg_handlers
[protocol
] = tab
;
200 tab
[msgindex
].doit
= doit
;
203 tab
[msgindex
].dumpit
= dumpit
;
206 tab
[msgindex
].calcit
= calcit
;
210 EXPORT_SYMBOL_GPL(__rtnl_register
);
213 * rtnl_register - Register a rtnetlink message type
215 * Identical to __rtnl_register() but panics on failure. This is useful
216 * as failure of this function is very unlikely, it can only happen due
217 * to lack of memory when allocating the chain to store all message
218 * handlers for a protocol. Meant for use in init functions where lack
219 * of memory implies no sense in continuing.
221 void rtnl_register(int protocol
, int msgtype
,
222 rtnl_doit_func doit
, rtnl_dumpit_func dumpit
,
223 rtnl_calcit_func calcit
)
225 if (__rtnl_register(protocol
, msgtype
, doit
, dumpit
, calcit
) < 0)
226 panic("Unable to register rtnetlink message handler, "
227 "protocol = %d, message type = %d\n",
230 EXPORT_SYMBOL_GPL(rtnl_register
);
233 * rtnl_unregister - Unregister a rtnetlink message type
234 * @protocol: Protocol family or PF_UNSPEC
235 * @msgtype: rtnetlink message type
237 * Returns 0 on success or a negative error code.
239 int rtnl_unregister(int protocol
, int msgtype
)
243 BUG_ON(protocol
< 0 || protocol
> RTNL_FAMILY_MAX
);
244 msgindex
= rtm_msgindex(msgtype
);
246 if (rtnl_msg_handlers
[protocol
] == NULL
)
249 rtnl_msg_handlers
[protocol
][msgindex
].doit
= NULL
;
250 rtnl_msg_handlers
[protocol
][msgindex
].dumpit
= NULL
;
254 EXPORT_SYMBOL_GPL(rtnl_unregister
);
257 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
258 * @protocol : Protocol family or PF_UNSPEC
260 * Identical to calling rtnl_unregster() for all registered message types
261 * of a certain protocol family.
263 void rtnl_unregister_all(int protocol
)
265 BUG_ON(protocol
< 0 || protocol
> RTNL_FAMILY_MAX
);
267 kfree(rtnl_msg_handlers
[protocol
]);
268 rtnl_msg_handlers
[protocol
] = NULL
;
270 EXPORT_SYMBOL_GPL(rtnl_unregister_all
);
272 static LIST_HEAD(link_ops
);
274 static const struct rtnl_link_ops
*rtnl_link_ops_get(const char *kind
)
276 const struct rtnl_link_ops
*ops
;
278 list_for_each_entry(ops
, &link_ops
, list
) {
279 if (!strcmp(ops
->kind
, kind
))
286 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
287 * @ops: struct rtnl_link_ops * to register
289 * The caller must hold the rtnl_mutex. This function should be used
290 * by drivers that create devices during module initialization. It
291 * must be called before registering the devices.
293 * Returns 0 on success or a negative error code.
295 int __rtnl_link_register(struct rtnl_link_ops
*ops
)
297 if (rtnl_link_ops_get(ops
->kind
))
301 ops
->dellink
= unregister_netdevice_queue
;
303 list_add_tail(&ops
->list
, &link_ops
);
306 EXPORT_SYMBOL_GPL(__rtnl_link_register
);
309 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
310 * @ops: struct rtnl_link_ops * to register
312 * Returns 0 on success or a negative error code.
314 int rtnl_link_register(struct rtnl_link_ops
*ops
)
319 err
= __rtnl_link_register(ops
);
323 EXPORT_SYMBOL_GPL(rtnl_link_register
);
325 static void __rtnl_kill_links(struct net
*net
, struct rtnl_link_ops
*ops
)
327 struct net_device
*dev
;
328 LIST_HEAD(list_kill
);
330 for_each_netdev(net
, dev
) {
331 if (dev
->rtnl_link_ops
== ops
)
332 ops
->dellink(dev
, &list_kill
);
334 unregister_netdevice_many(&list_kill
);
338 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
339 * @ops: struct rtnl_link_ops * to unregister
341 * The caller must hold the rtnl_mutex.
343 void __rtnl_link_unregister(struct rtnl_link_ops
*ops
)
348 __rtnl_kill_links(net
, ops
);
350 list_del(&ops
->list
);
352 EXPORT_SYMBOL_GPL(__rtnl_link_unregister
);
355 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
356 * @ops: struct rtnl_link_ops * to unregister
358 void rtnl_link_unregister(struct rtnl_link_ops
*ops
)
361 __rtnl_link_unregister(ops
);
364 EXPORT_SYMBOL_GPL(rtnl_link_unregister
);
366 static size_t rtnl_link_get_size(const struct net_device
*dev
)
368 const struct rtnl_link_ops
*ops
= dev
->rtnl_link_ops
;
374 size
= nla_total_size(sizeof(struct nlattr
)) + /* IFLA_LINKINFO */
375 nla_total_size(strlen(ops
->kind
) + 1); /* IFLA_INFO_KIND */
378 /* IFLA_INFO_DATA + nested data */
379 size
+= nla_total_size(sizeof(struct nlattr
)) +
382 if (ops
->get_xstats_size
)
383 /* IFLA_INFO_XSTATS */
384 size
+= nla_total_size(ops
->get_xstats_size(dev
));
389 static LIST_HEAD(rtnl_af_ops
);
391 static const struct rtnl_af_ops
*rtnl_af_lookup(const int family
)
393 const struct rtnl_af_ops
*ops
;
395 list_for_each_entry(ops
, &rtnl_af_ops
, list
) {
396 if (ops
->family
== family
)
404 * __rtnl_af_register - Register rtnl_af_ops with rtnetlink.
405 * @ops: struct rtnl_af_ops * to register
407 * The caller must hold the rtnl_mutex.
409 * Returns 0 on success or a negative error code.
411 int __rtnl_af_register(struct rtnl_af_ops
*ops
)
413 list_add_tail(&ops
->list
, &rtnl_af_ops
);
416 EXPORT_SYMBOL_GPL(__rtnl_af_register
);
419 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
420 * @ops: struct rtnl_af_ops * to register
422 * Returns 0 on success or a negative error code.
424 int rtnl_af_register(struct rtnl_af_ops
*ops
)
429 err
= __rtnl_af_register(ops
);
433 EXPORT_SYMBOL_GPL(rtnl_af_register
);
436 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
437 * @ops: struct rtnl_af_ops * to unregister
439 * The caller must hold the rtnl_mutex.
441 void __rtnl_af_unregister(struct rtnl_af_ops
*ops
)
443 list_del(&ops
->list
);
445 EXPORT_SYMBOL_GPL(__rtnl_af_unregister
);
448 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
449 * @ops: struct rtnl_af_ops * to unregister
451 void rtnl_af_unregister(struct rtnl_af_ops
*ops
)
454 __rtnl_af_unregister(ops
);
457 EXPORT_SYMBOL_GPL(rtnl_af_unregister
);
459 static size_t rtnl_link_get_af_size(const struct net_device
*dev
)
461 struct rtnl_af_ops
*af_ops
;
465 size
= nla_total_size(sizeof(struct nlattr
));
467 list_for_each_entry(af_ops
, &rtnl_af_ops
, list
) {
468 if (af_ops
->get_link_af_size
) {
469 /* AF_* + nested data */
470 size
+= nla_total_size(sizeof(struct nlattr
)) +
471 af_ops
->get_link_af_size(dev
);
478 static int rtnl_link_fill(struct sk_buff
*skb
, const struct net_device
*dev
)
480 const struct rtnl_link_ops
*ops
= dev
->rtnl_link_ops
;
481 struct nlattr
*linkinfo
, *data
;
484 linkinfo
= nla_nest_start(skb
, IFLA_LINKINFO
);
485 if (linkinfo
== NULL
)
488 if (nla_put_string(skb
, IFLA_INFO_KIND
, ops
->kind
) < 0)
489 goto err_cancel_link
;
490 if (ops
->fill_xstats
) {
491 err
= ops
->fill_xstats(skb
, dev
);
493 goto err_cancel_link
;
495 if (ops
->fill_info
) {
496 data
= nla_nest_start(skb
, IFLA_INFO_DATA
);
498 goto err_cancel_link
;
499 err
= ops
->fill_info(skb
, dev
);
501 goto err_cancel_data
;
502 nla_nest_end(skb
, data
);
505 nla_nest_end(skb
, linkinfo
);
509 nla_nest_cancel(skb
, data
);
511 nla_nest_cancel(skb
, linkinfo
);
516 static const int rtm_min
[RTM_NR_FAMILIES
] =
518 [RTM_FAM(RTM_NEWLINK
)] = NLMSG_LENGTH(sizeof(struct ifinfomsg
)),
519 [RTM_FAM(RTM_NEWADDR
)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg
)),
520 [RTM_FAM(RTM_NEWROUTE
)] = NLMSG_LENGTH(sizeof(struct rtmsg
)),
521 [RTM_FAM(RTM_NEWRULE
)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr
)),
522 [RTM_FAM(RTM_NEWQDISC
)] = NLMSG_LENGTH(sizeof(struct tcmsg
)),
523 [RTM_FAM(RTM_NEWTCLASS
)] = NLMSG_LENGTH(sizeof(struct tcmsg
)),
524 [RTM_FAM(RTM_NEWTFILTER
)] = NLMSG_LENGTH(sizeof(struct tcmsg
)),
525 [RTM_FAM(RTM_NEWACTION
)] = NLMSG_LENGTH(sizeof(struct tcamsg
)),
526 [RTM_FAM(RTM_GETMULTICAST
)] = NLMSG_LENGTH(sizeof(struct rtgenmsg
)),
527 [RTM_FAM(RTM_GETANYCAST
)] = NLMSG_LENGTH(sizeof(struct rtgenmsg
)),
530 static const int rta_max
[RTM_NR_FAMILIES
] =
532 [RTM_FAM(RTM_NEWLINK
)] = IFLA_MAX
,
533 [RTM_FAM(RTM_NEWADDR
)] = IFA_MAX
,
534 [RTM_FAM(RTM_NEWROUTE
)] = RTA_MAX
,
535 [RTM_FAM(RTM_NEWRULE
)] = FRA_MAX
,
536 [RTM_FAM(RTM_NEWQDISC
)] = TCA_MAX
,
537 [RTM_FAM(RTM_NEWTCLASS
)] = TCA_MAX
,
538 [RTM_FAM(RTM_NEWTFILTER
)] = TCA_MAX
,
539 [RTM_FAM(RTM_NEWACTION
)] = TCAA_MAX
,
542 void __rta_fill(struct sk_buff
*skb
, int attrtype
, int attrlen
, const void *data
)
545 int size
= RTA_LENGTH(attrlen
);
547 rta
= (struct rtattr
*)skb_put(skb
, RTA_ALIGN(size
));
548 rta
->rta_type
= attrtype
;
550 memcpy(RTA_DATA(rta
), data
, attrlen
);
551 memset(RTA_DATA(rta
) + attrlen
, 0, RTA_ALIGN(size
) - size
);
553 EXPORT_SYMBOL(__rta_fill
);
555 int rtnetlink_send(struct sk_buff
*skb
, struct net
*net
, u32 pid
, unsigned group
, int echo
)
557 struct sock
*rtnl
= net
->rtnl
;
560 NETLINK_CB(skb
).dst_group
= group
;
562 atomic_inc(&skb
->users
);
563 netlink_broadcast(rtnl
, skb
, pid
, group
, GFP_KERNEL
);
565 err
= netlink_unicast(rtnl
, skb
, pid
, MSG_DONTWAIT
);
569 int rtnl_unicast(struct sk_buff
*skb
, struct net
*net
, u32 pid
)
571 struct sock
*rtnl
= net
->rtnl
;
573 return nlmsg_unicast(rtnl
, skb
, pid
);
575 EXPORT_SYMBOL(rtnl_unicast
);
577 void rtnl_notify(struct sk_buff
*skb
, struct net
*net
, u32 pid
, u32 group
,
578 struct nlmsghdr
*nlh
, gfp_t flags
)
580 struct sock
*rtnl
= net
->rtnl
;
584 report
= nlmsg_report(nlh
);
586 nlmsg_notify(rtnl
, skb
, pid
, group
, report
, flags
);
588 EXPORT_SYMBOL(rtnl_notify
);
590 void rtnl_set_sk_err(struct net
*net
, u32 group
, int error
)
592 struct sock
*rtnl
= net
->rtnl
;
594 netlink_set_err(rtnl
, 0, group
, error
);
596 EXPORT_SYMBOL(rtnl_set_sk_err
);
598 int rtnetlink_put_metrics(struct sk_buff
*skb
, u32
*metrics
)
603 mx
= nla_nest_start(skb
, RTA_METRICS
);
607 for (i
= 0; i
< RTAX_MAX
; i
++) {
610 NLA_PUT_U32(skb
, i
+1, metrics
[i
]);
615 nla_nest_cancel(skb
, mx
);
619 return nla_nest_end(skb
, mx
);
622 nla_nest_cancel(skb
, mx
);
625 EXPORT_SYMBOL(rtnetlink_put_metrics
);
627 int rtnl_put_cacheinfo(struct sk_buff
*skb
, struct dst_entry
*dst
, u32 id
,
628 u32 ts
, u32 tsage
, long expires
, u32 error
)
630 struct rta_cacheinfo ci
= {
631 .rta_lastuse
= jiffies_to_clock_t(jiffies
- dst
->lastuse
),
632 .rta_used
= dst
->__use
,
633 .rta_clntref
= atomic_read(&(dst
->__refcnt
)),
641 ci
.rta_expires
= jiffies_to_clock_t(expires
);
643 return nla_put(skb
, RTA_CACHEINFO
, sizeof(ci
), &ci
);
645 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo
);
647 static void set_operstate(struct net_device
*dev
, unsigned char transition
)
649 unsigned char operstate
= dev
->operstate
;
651 switch (transition
) {
653 if ((operstate
== IF_OPER_DORMANT
||
654 operstate
== IF_OPER_UNKNOWN
) &&
656 operstate
= IF_OPER_UP
;
659 case IF_OPER_DORMANT
:
660 if (operstate
== IF_OPER_UP
||
661 operstate
== IF_OPER_UNKNOWN
)
662 operstate
= IF_OPER_DORMANT
;
666 if (dev
->operstate
!= operstate
) {
667 write_lock_bh(&dev_base_lock
);
668 dev
->operstate
= operstate
;
669 write_unlock_bh(&dev_base_lock
);
670 netdev_state_change(dev
);
674 static unsigned int rtnl_dev_combine_flags(const struct net_device
*dev
,
675 const struct ifinfomsg
*ifm
)
677 unsigned int flags
= ifm
->ifi_flags
;
679 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
681 flags
= (flags
& ifm
->ifi_change
) |
682 (dev
->flags
& ~ifm
->ifi_change
);
687 static void copy_rtnl_link_stats(struct rtnl_link_stats
*a
,
688 const struct rtnl_link_stats64
*b
)
690 a
->rx_packets
= b
->rx_packets
;
691 a
->tx_packets
= b
->tx_packets
;
692 a
->rx_bytes
= b
->rx_bytes
;
693 a
->tx_bytes
= b
->tx_bytes
;
694 a
->rx_errors
= b
->rx_errors
;
695 a
->tx_errors
= b
->tx_errors
;
696 a
->rx_dropped
= b
->rx_dropped
;
697 a
->tx_dropped
= b
->tx_dropped
;
699 a
->multicast
= b
->multicast
;
700 a
->collisions
= b
->collisions
;
702 a
->rx_length_errors
= b
->rx_length_errors
;
703 a
->rx_over_errors
= b
->rx_over_errors
;
704 a
->rx_crc_errors
= b
->rx_crc_errors
;
705 a
->rx_frame_errors
= b
->rx_frame_errors
;
706 a
->rx_fifo_errors
= b
->rx_fifo_errors
;
707 a
->rx_missed_errors
= b
->rx_missed_errors
;
709 a
->tx_aborted_errors
= b
->tx_aborted_errors
;
710 a
->tx_carrier_errors
= b
->tx_carrier_errors
;
711 a
->tx_fifo_errors
= b
->tx_fifo_errors
;
712 a
->tx_heartbeat_errors
= b
->tx_heartbeat_errors
;
713 a
->tx_window_errors
= b
->tx_window_errors
;
715 a
->rx_compressed
= b
->rx_compressed
;
716 a
->tx_compressed
= b
->tx_compressed
;
719 static void copy_rtnl_link_stats64(void *v
, const struct rtnl_link_stats64
*b
)
721 memcpy(v
, b
, sizeof(*b
));
725 static inline int rtnl_vfinfo_size(const struct net_device
*dev
,
728 if (dev
->dev
.parent
&& dev_is_pci(dev
->dev
.parent
) &&
729 (ext_filter_mask
& RTEXT_FILTER_VF
)) {
730 int num_vfs
= dev_num_vf(dev
->dev
.parent
);
731 size_t size
= nla_total_size(sizeof(struct nlattr
));
732 size
+= nla_total_size(num_vfs
* sizeof(struct nlattr
));
734 (nla_total_size(sizeof(struct ifla_vf_mac
)) +
735 nla_total_size(sizeof(struct ifla_vf_vlan
)) +
736 nla_total_size(sizeof(struct ifla_vf_tx_rate
)) +
737 nla_total_size(sizeof(struct ifla_vf_spoofchk
)));
743 static size_t rtnl_port_size(const struct net_device
*dev
)
745 size_t port_size
= nla_total_size(4) /* PORT_VF */
746 + nla_total_size(PORT_PROFILE_MAX
) /* PORT_PROFILE */
747 + nla_total_size(sizeof(struct ifla_port_vsi
))
749 + nla_total_size(PORT_UUID_MAX
) /* PORT_INSTANCE_UUID */
750 + nla_total_size(PORT_UUID_MAX
) /* PORT_HOST_UUID */
751 + nla_total_size(1) /* PROT_VDP_REQUEST */
752 + nla_total_size(2); /* PORT_VDP_RESPONSE */
753 size_t vf_ports_size
= nla_total_size(sizeof(struct nlattr
));
754 size_t vf_port_size
= nla_total_size(sizeof(struct nlattr
))
756 size_t port_self_size
= nla_total_size(sizeof(struct nlattr
))
759 if (!dev
->netdev_ops
->ndo_get_vf_port
|| !dev
->dev
.parent
)
761 if (dev_num_vf(dev
->dev
.parent
))
762 return port_self_size
+ vf_ports_size
+
763 vf_port_size
* dev_num_vf(dev
->dev
.parent
);
765 return port_self_size
;
768 static noinline
size_t if_nlmsg_size(const struct net_device
*dev
,
771 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
772 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
773 + nla_total_size(IFALIASZ
) /* IFLA_IFALIAS */
774 + nla_total_size(IFNAMSIZ
) /* IFLA_QDISC */
775 + nla_total_size(sizeof(struct rtnl_link_ifmap
))
776 + nla_total_size(sizeof(struct rtnl_link_stats
))
777 + nla_total_size(sizeof(struct rtnl_link_stats64
))
778 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
779 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_BROADCAST */
780 + nla_total_size(4) /* IFLA_TXQLEN */
781 + nla_total_size(4) /* IFLA_WEIGHT */
782 + nla_total_size(4) /* IFLA_MTU */
783 + nla_total_size(4) /* IFLA_LINK */
784 + nla_total_size(4) /* IFLA_MASTER */
785 + nla_total_size(1) /* IFLA_OPERSTATE */
786 + nla_total_size(1) /* IFLA_LINKMODE */
787 + nla_total_size(ext_filter_mask
788 & RTEXT_FILTER_VF
? 4 : 0) /* IFLA_NUM_VF */
789 + rtnl_vfinfo_size(dev
, ext_filter_mask
) /* IFLA_VFINFO_LIST */
790 + rtnl_port_size(dev
) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
791 + rtnl_link_get_size(dev
) /* IFLA_LINKINFO */
792 + rtnl_link_get_af_size(dev
); /* IFLA_AF_SPEC */
795 static int rtnl_vf_ports_fill(struct sk_buff
*skb
, struct net_device
*dev
)
797 struct nlattr
*vf_ports
;
798 struct nlattr
*vf_port
;
802 vf_ports
= nla_nest_start(skb
, IFLA_VF_PORTS
);
806 for (vf
= 0; vf
< dev_num_vf(dev
->dev
.parent
); vf
++) {
807 vf_port
= nla_nest_start(skb
, IFLA_VF_PORT
);
809 goto nla_put_failure
;
810 NLA_PUT_U32(skb
, IFLA_PORT_VF
, vf
);
811 err
= dev
->netdev_ops
->ndo_get_vf_port(dev
, vf
, skb
);
812 if (err
== -EMSGSIZE
)
813 goto nla_put_failure
;
815 nla_nest_cancel(skb
, vf_port
);
818 nla_nest_end(skb
, vf_port
);
821 nla_nest_end(skb
, vf_ports
);
826 nla_nest_cancel(skb
, vf_ports
);
830 static int rtnl_port_self_fill(struct sk_buff
*skb
, struct net_device
*dev
)
832 struct nlattr
*port_self
;
835 port_self
= nla_nest_start(skb
, IFLA_PORT_SELF
);
839 err
= dev
->netdev_ops
->ndo_get_vf_port(dev
, PORT_SELF_VF
, skb
);
841 nla_nest_cancel(skb
, port_self
);
842 return (err
== -EMSGSIZE
) ? err
: 0;
845 nla_nest_end(skb
, port_self
);
850 static int rtnl_port_fill(struct sk_buff
*skb
, struct net_device
*dev
)
854 if (!dev
->netdev_ops
->ndo_get_vf_port
|| !dev
->dev
.parent
)
857 err
= rtnl_port_self_fill(skb
, dev
);
861 if (dev_num_vf(dev
->dev
.parent
)) {
862 err
= rtnl_vf_ports_fill(skb
, dev
);
870 static int rtnl_fill_ifinfo(struct sk_buff
*skb
, struct net_device
*dev
,
871 int type
, u32 pid
, u32 seq
, u32 change
,
872 unsigned int flags
, u32 ext_filter_mask
)
874 struct ifinfomsg
*ifm
;
875 struct nlmsghdr
*nlh
;
876 struct rtnl_link_stats64 temp
;
877 const struct rtnl_link_stats64
*stats
;
878 struct nlattr
*attr
, *af_spec
;
879 struct rtnl_af_ops
*af_ops
;
882 nlh
= nlmsg_put(skb
, pid
, seq
, type
, sizeof(*ifm
), flags
);
886 ifm
= nlmsg_data(nlh
);
887 ifm
->ifi_family
= AF_UNSPEC
;
889 ifm
->ifi_type
= dev
->type
;
890 ifm
->ifi_index
= dev
->ifindex
;
891 ifm
->ifi_flags
= dev_get_flags(dev
);
892 ifm
->ifi_change
= change
;
894 NLA_PUT_STRING(skb
, IFLA_IFNAME
, dev
->name
);
895 NLA_PUT_U32(skb
, IFLA_TXQLEN
, dev
->tx_queue_len
);
896 NLA_PUT_U8(skb
, IFLA_OPERSTATE
,
897 netif_running(dev
) ? dev
->operstate
: IF_OPER_DOWN
);
898 NLA_PUT_U8(skb
, IFLA_LINKMODE
, dev
->link_mode
);
899 NLA_PUT_U32(skb
, IFLA_MTU
, dev
->mtu
);
900 NLA_PUT_U32(skb
, IFLA_GROUP
, dev
->group
);
902 if (dev
->ifindex
!= dev
->iflink
)
903 NLA_PUT_U32(skb
, IFLA_LINK
, dev
->iflink
);
906 NLA_PUT_U32(skb
, IFLA_MASTER
, dev
->master
->ifindex
);
909 NLA_PUT_STRING(skb
, IFLA_QDISC
, dev
->qdisc
->ops
->id
);
912 NLA_PUT_STRING(skb
, IFLA_IFALIAS
, dev
->ifalias
);
915 struct rtnl_link_ifmap map
= {
916 .mem_start
= dev
->mem_start
,
917 .mem_end
= dev
->mem_end
,
918 .base_addr
= dev
->base_addr
,
921 .port
= dev
->if_port
,
923 NLA_PUT(skb
, IFLA_MAP
, sizeof(map
), &map
);
927 NLA_PUT(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
);
928 NLA_PUT(skb
, IFLA_BROADCAST
, dev
->addr_len
, dev
->broadcast
);
931 attr
= nla_reserve(skb
, IFLA_STATS
,
932 sizeof(struct rtnl_link_stats
));
934 goto nla_put_failure
;
936 stats
= dev_get_stats(dev
, &temp
);
937 copy_rtnl_link_stats(nla_data(attr
), stats
);
939 attr
= nla_reserve(skb
, IFLA_STATS64
,
940 sizeof(struct rtnl_link_stats64
));
942 goto nla_put_failure
;
943 copy_rtnl_link_stats64(nla_data(attr
), stats
);
945 if (dev
->dev
.parent
&& (ext_filter_mask
& RTEXT_FILTER_VF
))
946 NLA_PUT_U32(skb
, IFLA_NUM_VF
, dev_num_vf(dev
->dev
.parent
));
948 if (dev
->netdev_ops
->ndo_get_vf_config
&& dev
->dev
.parent
949 && (ext_filter_mask
& RTEXT_FILTER_VF
)) {
952 struct nlattr
*vfinfo
, *vf
;
953 int num_vfs
= dev_num_vf(dev
->dev
.parent
);
955 vfinfo
= nla_nest_start(skb
, IFLA_VFINFO_LIST
);
957 goto nla_put_failure
;
958 for (i
= 0; i
< num_vfs
; i
++) {
959 struct ifla_vf_info ivi
;
960 struct ifla_vf_mac vf_mac
;
961 struct ifla_vf_vlan vf_vlan
;
962 struct ifla_vf_tx_rate vf_tx_rate
;
963 struct ifla_vf_spoofchk vf_spoofchk
;
966 * Not all SR-IOV capable drivers support the
967 * spoofcheck query. Preset to -1 so the user
968 * space tool can detect that the driver didn't
972 if (dev
->netdev_ops
->ndo_get_vf_config(dev
, i
, &ivi
))
977 vf_spoofchk
.vf
= ivi
.vf
;
979 memcpy(vf_mac
.mac
, ivi
.mac
, sizeof(ivi
.mac
));
980 vf_vlan
.vlan
= ivi
.vlan
;
981 vf_vlan
.qos
= ivi
.qos
;
982 vf_tx_rate
.rate
= ivi
.tx_rate
;
983 vf_spoofchk
.setting
= ivi
.spoofchk
;
984 vf
= nla_nest_start(skb
, IFLA_VF_INFO
);
986 nla_nest_cancel(skb
, vfinfo
);
987 goto nla_put_failure
;
989 NLA_PUT(skb
, IFLA_VF_MAC
, sizeof(vf_mac
), &vf_mac
);
990 NLA_PUT(skb
, IFLA_VF_VLAN
, sizeof(vf_vlan
), &vf_vlan
);
991 NLA_PUT(skb
, IFLA_VF_TX_RATE
, sizeof(vf_tx_rate
),
993 NLA_PUT(skb
, IFLA_VF_SPOOFCHK
, sizeof(vf_spoofchk
),
995 nla_nest_end(skb
, vf
);
997 nla_nest_end(skb
, vfinfo
);
1000 if (rtnl_port_fill(skb
, dev
))
1001 goto nla_put_failure
;
1003 if (dev
->rtnl_link_ops
) {
1004 if (rtnl_link_fill(skb
, dev
) < 0)
1005 goto nla_put_failure
;
1008 if (!(af_spec
= nla_nest_start(skb
, IFLA_AF_SPEC
)))
1009 goto nla_put_failure
;
1011 list_for_each_entry(af_ops
, &rtnl_af_ops
, list
) {
1012 if (af_ops
->fill_link_af
) {
1016 if (!(af
= nla_nest_start(skb
, af_ops
->family
)))
1017 goto nla_put_failure
;
1019 err
= af_ops
->fill_link_af(skb
, dev
);
1022 * Caller may return ENODATA to indicate that there
1023 * was no data to be dumped. This is not an error, it
1024 * means we should trim the attribute header and
1027 if (err
== -ENODATA
)
1028 nla_nest_cancel(skb
, af
);
1030 goto nla_put_failure
;
1032 nla_nest_end(skb
, af
);
1036 nla_nest_end(skb
, af_spec
);
1038 return nlmsg_end(skb
, nlh
);
1041 nlmsg_cancel(skb
, nlh
);
1045 static int rtnl_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1047 struct net
*net
= sock_net(skb
->sk
);
1050 struct net_device
*dev
;
1051 struct hlist_head
*head
;
1052 struct hlist_node
*node
;
1053 struct nlattr
*tb
[IFLA_MAX
+1];
1054 u32 ext_filter_mask
= 0;
1057 s_idx
= cb
->args
[1];
1060 cb
->seq
= net
->dev_base_seq
;
1062 if (nlmsg_parse(cb
->nlh
, sizeof(struct rtgenmsg
), tb
, IFLA_MAX
,
1063 ifla_policy
) >= 0) {
1065 if (tb
[IFLA_EXT_MASK
])
1066 ext_filter_mask
= nla_get_u32(tb
[IFLA_EXT_MASK
]);
1069 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
1071 head
= &net
->dev_index_head
[h
];
1072 hlist_for_each_entry_rcu(dev
, node
, head
, index_hlist
) {
1075 if (rtnl_fill_ifinfo(skb
, dev
, RTM_NEWLINK
,
1076 NETLINK_CB(cb
->skb
).pid
,
1077 cb
->nlh
->nlmsg_seq
, 0,
1079 ext_filter_mask
) <= 0)
1082 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
1095 const struct nla_policy ifla_policy
[IFLA_MAX
+1] = {
1096 [IFLA_IFNAME
] = { .type
= NLA_STRING
, .len
= IFNAMSIZ
-1 },
1097 [IFLA_ADDRESS
] = { .type
= NLA_BINARY
, .len
= MAX_ADDR_LEN
},
1098 [IFLA_BROADCAST
] = { .type
= NLA_BINARY
, .len
= MAX_ADDR_LEN
},
1099 [IFLA_MAP
] = { .len
= sizeof(struct rtnl_link_ifmap
) },
1100 [IFLA_MTU
] = { .type
= NLA_U32
},
1101 [IFLA_LINK
] = { .type
= NLA_U32
},
1102 [IFLA_MASTER
] = { .type
= NLA_U32
},
1103 [IFLA_TXQLEN
] = { .type
= NLA_U32
},
1104 [IFLA_WEIGHT
] = { .type
= NLA_U32
},
1105 [IFLA_OPERSTATE
] = { .type
= NLA_U8
},
1106 [IFLA_LINKMODE
] = { .type
= NLA_U8
},
1107 [IFLA_LINKINFO
] = { .type
= NLA_NESTED
},
1108 [IFLA_NET_NS_PID
] = { .type
= NLA_U32
},
1109 [IFLA_NET_NS_FD
] = { .type
= NLA_U32
},
1110 [IFLA_IFALIAS
] = { .type
= NLA_STRING
, .len
= IFALIASZ
-1 },
1111 [IFLA_VFINFO_LIST
] = {. type
= NLA_NESTED
},
1112 [IFLA_VF_PORTS
] = { .type
= NLA_NESTED
},
1113 [IFLA_PORT_SELF
] = { .type
= NLA_NESTED
},
1114 [IFLA_AF_SPEC
] = { .type
= NLA_NESTED
},
1115 [IFLA_EXT_MASK
] = { .type
= NLA_U32
},
1117 EXPORT_SYMBOL(ifla_policy
);
1119 static const struct nla_policy ifla_info_policy
[IFLA_INFO_MAX
+1] = {
1120 [IFLA_INFO_KIND
] = { .type
= NLA_STRING
},
1121 [IFLA_INFO_DATA
] = { .type
= NLA_NESTED
},
1124 static const struct nla_policy ifla_vfinfo_policy
[IFLA_VF_INFO_MAX
+1] = {
1125 [IFLA_VF_INFO
] = { .type
= NLA_NESTED
},
1128 static const struct nla_policy ifla_vf_policy
[IFLA_VF_MAX
+1] = {
1129 [IFLA_VF_MAC
] = { .type
= NLA_BINARY
,
1130 .len
= sizeof(struct ifla_vf_mac
) },
1131 [IFLA_VF_VLAN
] = { .type
= NLA_BINARY
,
1132 .len
= sizeof(struct ifla_vf_vlan
) },
1133 [IFLA_VF_TX_RATE
] = { .type
= NLA_BINARY
,
1134 .len
= sizeof(struct ifla_vf_tx_rate
) },
1135 [IFLA_VF_SPOOFCHK
] = { .type
= NLA_BINARY
,
1136 .len
= sizeof(struct ifla_vf_spoofchk
) },
1139 static const struct nla_policy ifla_port_policy
[IFLA_PORT_MAX
+1] = {
1140 [IFLA_PORT_VF
] = { .type
= NLA_U32
},
1141 [IFLA_PORT_PROFILE
] = { .type
= NLA_STRING
,
1142 .len
= PORT_PROFILE_MAX
},
1143 [IFLA_PORT_VSI_TYPE
] = { .type
= NLA_BINARY
,
1144 .len
= sizeof(struct ifla_port_vsi
)},
1145 [IFLA_PORT_INSTANCE_UUID
] = { .type
= NLA_BINARY
,
1146 .len
= PORT_UUID_MAX
},
1147 [IFLA_PORT_HOST_UUID
] = { .type
= NLA_STRING
,
1148 .len
= PORT_UUID_MAX
},
1149 [IFLA_PORT_REQUEST
] = { .type
= NLA_U8
, },
1150 [IFLA_PORT_RESPONSE
] = { .type
= NLA_U16
, },
1153 struct net
*rtnl_link_get_net(struct net
*src_net
, struct nlattr
*tb
[])
1156 /* Examine the link attributes and figure out which
1157 * network namespace we are talking about.
1159 if (tb
[IFLA_NET_NS_PID
])
1160 net
= get_net_ns_by_pid(nla_get_u32(tb
[IFLA_NET_NS_PID
]));
1161 else if (tb
[IFLA_NET_NS_FD
])
1162 net
= get_net_ns_by_fd(nla_get_u32(tb
[IFLA_NET_NS_FD
]));
1164 net
= get_net(src_net
);
1167 EXPORT_SYMBOL(rtnl_link_get_net
);
1169 static int validate_linkmsg(struct net_device
*dev
, struct nlattr
*tb
[])
1172 if (tb
[IFLA_ADDRESS
] &&
1173 nla_len(tb
[IFLA_ADDRESS
]) < dev
->addr_len
)
1176 if (tb
[IFLA_BROADCAST
] &&
1177 nla_len(tb
[IFLA_BROADCAST
]) < dev
->addr_len
)
1181 if (tb
[IFLA_AF_SPEC
]) {
1185 nla_for_each_nested(af
, tb
[IFLA_AF_SPEC
], rem
) {
1186 const struct rtnl_af_ops
*af_ops
;
1188 if (!(af_ops
= rtnl_af_lookup(nla_type(af
))))
1189 return -EAFNOSUPPORT
;
1191 if (!af_ops
->set_link_af
)
1194 if (af_ops
->validate_link_af
) {
1195 err
= af_ops
->validate_link_af(dev
, af
);
1205 static int do_setvfinfo(struct net_device
*dev
, struct nlattr
*attr
)
1207 int rem
, err
= -EINVAL
;
1209 const struct net_device_ops
*ops
= dev
->netdev_ops
;
1211 nla_for_each_nested(vf
, attr
, rem
) {
1212 switch (nla_type(vf
)) {
1214 struct ifla_vf_mac
*ivm
;
1217 if (ops
->ndo_set_vf_mac
)
1218 err
= ops
->ndo_set_vf_mac(dev
, ivm
->vf
,
1222 case IFLA_VF_VLAN
: {
1223 struct ifla_vf_vlan
*ivv
;
1226 if (ops
->ndo_set_vf_vlan
)
1227 err
= ops
->ndo_set_vf_vlan(dev
, ivv
->vf
,
1232 case IFLA_VF_TX_RATE
: {
1233 struct ifla_vf_tx_rate
*ivt
;
1236 if (ops
->ndo_set_vf_tx_rate
)
1237 err
= ops
->ndo_set_vf_tx_rate(dev
, ivt
->vf
,
1241 case IFLA_VF_SPOOFCHK
: {
1242 struct ifla_vf_spoofchk
*ivs
;
1245 if (ops
->ndo_set_vf_spoofchk
)
1246 err
= ops
->ndo_set_vf_spoofchk(dev
, ivs
->vf
,
1260 static int do_set_master(struct net_device
*dev
, int ifindex
)
1262 struct net_device
*master_dev
;
1263 const struct net_device_ops
*ops
;
1267 if (dev
->master
->ifindex
== ifindex
)
1269 ops
= dev
->master
->netdev_ops
;
1270 if (ops
->ndo_del_slave
) {
1271 err
= ops
->ndo_del_slave(dev
->master
, dev
);
1280 master_dev
= __dev_get_by_index(dev_net(dev
), ifindex
);
1283 ops
= master_dev
->netdev_ops
;
1284 if (ops
->ndo_add_slave
) {
1285 err
= ops
->ndo_add_slave(master_dev
, dev
);
1295 static int do_setlink(struct net_device
*dev
, struct ifinfomsg
*ifm
,
1296 struct nlattr
**tb
, char *ifname
, int modified
)
1298 const struct net_device_ops
*ops
= dev
->netdev_ops
;
1299 int send_addr_notify
= 0;
1302 if (tb
[IFLA_NET_NS_PID
] || tb
[IFLA_NET_NS_FD
]) {
1303 struct net
*net
= rtnl_link_get_net(dev_net(dev
), tb
);
1308 err
= dev_change_net_namespace(dev
, net
, ifname
);
1316 struct rtnl_link_ifmap
*u_map
;
1319 if (!ops
->ndo_set_config
) {
1324 if (!netif_device_present(dev
)) {
1329 u_map
= nla_data(tb
[IFLA_MAP
]);
1330 k_map
.mem_start
= (unsigned long) u_map
->mem_start
;
1331 k_map
.mem_end
= (unsigned long) u_map
->mem_end
;
1332 k_map
.base_addr
= (unsigned short) u_map
->base_addr
;
1333 k_map
.irq
= (unsigned char) u_map
->irq
;
1334 k_map
.dma
= (unsigned char) u_map
->dma
;
1335 k_map
.port
= (unsigned char) u_map
->port
;
1337 err
= ops
->ndo_set_config(dev
, &k_map
);
1344 if (tb
[IFLA_ADDRESS
]) {
1345 struct sockaddr
*sa
;
1348 if (!ops
->ndo_set_mac_address
) {
1353 if (!netif_device_present(dev
)) {
1358 len
= sizeof(sa_family_t
) + dev
->addr_len
;
1359 sa
= kmalloc(len
, GFP_KERNEL
);
1364 sa
->sa_family
= dev
->type
;
1365 memcpy(sa
->sa_data
, nla_data(tb
[IFLA_ADDRESS
]),
1367 err
= ops
->ndo_set_mac_address(dev
, sa
);
1371 send_addr_notify
= 1;
1376 err
= dev_set_mtu(dev
, nla_get_u32(tb
[IFLA_MTU
]));
1382 if (tb
[IFLA_GROUP
]) {
1383 dev_set_group(dev
, nla_get_u32(tb
[IFLA_GROUP
]));
1388 * Interface selected by interface index but interface
1389 * name provided implies that a name change has been
1392 if (ifm
->ifi_index
> 0 && ifname
[0]) {
1393 err
= dev_change_name(dev
, ifname
);
1399 if (tb
[IFLA_IFALIAS
]) {
1400 err
= dev_set_alias(dev
, nla_data(tb
[IFLA_IFALIAS
]),
1401 nla_len(tb
[IFLA_IFALIAS
]));
1407 if (tb
[IFLA_BROADCAST
]) {
1408 nla_memcpy(dev
->broadcast
, tb
[IFLA_BROADCAST
], dev
->addr_len
);
1409 send_addr_notify
= 1;
1412 if (ifm
->ifi_flags
|| ifm
->ifi_change
) {
1413 err
= dev_change_flags(dev
, rtnl_dev_combine_flags(dev
, ifm
));
1418 if (tb
[IFLA_MASTER
]) {
1419 err
= do_set_master(dev
, nla_get_u32(tb
[IFLA_MASTER
]));
1425 if (tb
[IFLA_TXQLEN
])
1426 dev
->tx_queue_len
= nla_get_u32(tb
[IFLA_TXQLEN
]);
1428 if (tb
[IFLA_OPERSTATE
])
1429 set_operstate(dev
, nla_get_u8(tb
[IFLA_OPERSTATE
]));
1431 if (tb
[IFLA_LINKMODE
]) {
1432 write_lock_bh(&dev_base_lock
);
1433 dev
->link_mode
= nla_get_u8(tb
[IFLA_LINKMODE
]);
1434 write_unlock_bh(&dev_base_lock
);
1437 if (tb
[IFLA_VFINFO_LIST
]) {
1438 struct nlattr
*attr
;
1440 nla_for_each_nested(attr
, tb
[IFLA_VFINFO_LIST
], rem
) {
1441 if (nla_type(attr
) != IFLA_VF_INFO
) {
1445 err
= do_setvfinfo(dev
, attr
);
1453 if (tb
[IFLA_VF_PORTS
]) {
1454 struct nlattr
*port
[IFLA_PORT_MAX
+1];
1455 struct nlattr
*attr
;
1460 if (!ops
->ndo_set_vf_port
)
1463 nla_for_each_nested(attr
, tb
[IFLA_VF_PORTS
], rem
) {
1464 if (nla_type(attr
) != IFLA_VF_PORT
)
1466 err
= nla_parse_nested(port
, IFLA_PORT_MAX
,
1467 attr
, ifla_port_policy
);
1470 if (!port
[IFLA_PORT_VF
]) {
1474 vf
= nla_get_u32(port
[IFLA_PORT_VF
]);
1475 err
= ops
->ndo_set_vf_port(dev
, vf
, port
);
1483 if (tb
[IFLA_PORT_SELF
]) {
1484 struct nlattr
*port
[IFLA_PORT_MAX
+1];
1486 err
= nla_parse_nested(port
, IFLA_PORT_MAX
,
1487 tb
[IFLA_PORT_SELF
], ifla_port_policy
);
1492 if (ops
->ndo_set_vf_port
)
1493 err
= ops
->ndo_set_vf_port(dev
, PORT_SELF_VF
, port
);
1499 if (tb
[IFLA_AF_SPEC
]) {
1503 nla_for_each_nested(af
, tb
[IFLA_AF_SPEC
], rem
) {
1504 const struct rtnl_af_ops
*af_ops
;
1506 if (!(af_ops
= rtnl_af_lookup(nla_type(af
))))
1509 err
= af_ops
->set_link_af(dev
, af
);
1519 if (err
< 0 && modified
&& net_ratelimit())
1520 printk(KERN_WARNING
"A link change request failed with "
1521 "some changes committed already. Interface %s may "
1522 "have been left with an inconsistent configuration, "
1523 "please check.\n", dev
->name
);
1525 if (send_addr_notify
)
1526 call_netdevice_notifiers(NETDEV_CHANGEADDR
, dev
);
1531 static int rtnl_setlink(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
1533 struct net
*net
= sock_net(skb
->sk
);
1534 struct ifinfomsg
*ifm
;
1535 struct net_device
*dev
;
1537 struct nlattr
*tb
[IFLA_MAX
+1];
1538 char ifname
[IFNAMSIZ
];
1540 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFLA_MAX
, ifla_policy
);
1544 if (tb
[IFLA_IFNAME
])
1545 nla_strlcpy(ifname
, tb
[IFLA_IFNAME
], IFNAMSIZ
);
1550 ifm
= nlmsg_data(nlh
);
1551 if (ifm
->ifi_index
> 0)
1552 dev
= __dev_get_by_index(net
, ifm
->ifi_index
);
1553 else if (tb
[IFLA_IFNAME
])
1554 dev
= __dev_get_by_name(net
, ifname
);
1563 err
= validate_linkmsg(dev
, tb
);
1567 err
= do_setlink(dev
, ifm
, tb
, ifname
, 0);
1572 static int rtnl_dellink(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
1574 struct net
*net
= sock_net(skb
->sk
);
1575 const struct rtnl_link_ops
*ops
;
1576 struct net_device
*dev
;
1577 struct ifinfomsg
*ifm
;
1578 char ifname
[IFNAMSIZ
];
1579 struct nlattr
*tb
[IFLA_MAX
+1];
1581 LIST_HEAD(list_kill
);
1583 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFLA_MAX
, ifla_policy
);
1587 if (tb
[IFLA_IFNAME
])
1588 nla_strlcpy(ifname
, tb
[IFLA_IFNAME
], IFNAMSIZ
);
1590 ifm
= nlmsg_data(nlh
);
1591 if (ifm
->ifi_index
> 0)
1592 dev
= __dev_get_by_index(net
, ifm
->ifi_index
);
1593 else if (tb
[IFLA_IFNAME
])
1594 dev
= __dev_get_by_name(net
, ifname
);
1601 ops
= dev
->rtnl_link_ops
;
1605 ops
->dellink(dev
, &list_kill
);
1606 unregister_netdevice_many(&list_kill
);
1607 list_del(&list_kill
);
1611 int rtnl_configure_link(struct net_device
*dev
, const struct ifinfomsg
*ifm
)
1613 unsigned int old_flags
;
1616 old_flags
= dev
->flags
;
1617 if (ifm
&& (ifm
->ifi_flags
|| ifm
->ifi_change
)) {
1618 err
= __dev_change_flags(dev
, rtnl_dev_combine_flags(dev
, ifm
));
1623 dev
->rtnl_link_state
= RTNL_LINK_INITIALIZED
;
1624 rtmsg_ifinfo(RTM_NEWLINK
, dev
, ~0U);
1626 __dev_notify_flags(dev
, old_flags
);
1629 EXPORT_SYMBOL(rtnl_configure_link
);
1631 struct net_device
*rtnl_create_link(struct net
*src_net
, struct net
*net
,
1632 char *ifname
, const struct rtnl_link_ops
*ops
, struct nlattr
*tb
[])
1635 struct net_device
*dev
;
1636 unsigned int num_queues
= 1;
1637 unsigned int real_num_queues
= 1;
1639 if (ops
->get_tx_queues
) {
1640 err
= ops
->get_tx_queues(src_net
, tb
, &num_queues
,
1646 dev
= alloc_netdev_mq(ops
->priv_size
, ifname
, ops
->setup
, num_queues
);
1650 dev_net_set(dev
, net
);
1651 dev
->rtnl_link_ops
= ops
;
1652 dev
->rtnl_link_state
= RTNL_LINK_INITIALIZING
;
1655 dev
->mtu
= nla_get_u32(tb
[IFLA_MTU
]);
1656 if (tb
[IFLA_ADDRESS
])
1657 memcpy(dev
->dev_addr
, nla_data(tb
[IFLA_ADDRESS
]),
1658 nla_len(tb
[IFLA_ADDRESS
]));
1659 if (tb
[IFLA_BROADCAST
])
1660 memcpy(dev
->broadcast
, nla_data(tb
[IFLA_BROADCAST
]),
1661 nla_len(tb
[IFLA_BROADCAST
]));
1662 if (tb
[IFLA_TXQLEN
])
1663 dev
->tx_queue_len
= nla_get_u32(tb
[IFLA_TXQLEN
]);
1664 if (tb
[IFLA_OPERSTATE
])
1665 set_operstate(dev
, nla_get_u8(tb
[IFLA_OPERSTATE
]));
1666 if (tb
[IFLA_LINKMODE
])
1667 dev
->link_mode
= nla_get_u8(tb
[IFLA_LINKMODE
]);
1669 dev_set_group(dev
, nla_get_u32(tb
[IFLA_GROUP
]));
1674 return ERR_PTR(err
);
1676 EXPORT_SYMBOL(rtnl_create_link
);
1678 static int rtnl_group_changelink(struct net
*net
, int group
,
1679 struct ifinfomsg
*ifm
,
1682 struct net_device
*dev
;
1685 for_each_netdev(net
, dev
) {
1686 if (dev
->group
== group
) {
1687 err
= do_setlink(dev
, ifm
, tb
, NULL
, 0);
1696 static int rtnl_newlink(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
1698 struct net
*net
= sock_net(skb
->sk
);
1699 const struct rtnl_link_ops
*ops
;
1700 struct net_device
*dev
;
1701 struct ifinfomsg
*ifm
;
1702 char kind
[MODULE_NAME_LEN
];
1703 char ifname
[IFNAMSIZ
];
1704 struct nlattr
*tb
[IFLA_MAX
+1];
1705 struct nlattr
*linkinfo
[IFLA_INFO_MAX
+1];
1708 #ifdef CONFIG_MODULES
1711 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFLA_MAX
, ifla_policy
);
1715 if (tb
[IFLA_IFNAME
])
1716 nla_strlcpy(ifname
, tb
[IFLA_IFNAME
], IFNAMSIZ
);
1720 ifm
= nlmsg_data(nlh
);
1721 if (ifm
->ifi_index
> 0)
1722 dev
= __dev_get_by_index(net
, ifm
->ifi_index
);
1725 dev
= __dev_get_by_name(net
, ifname
);
1730 err
= validate_linkmsg(dev
, tb
);
1734 if (tb
[IFLA_LINKINFO
]) {
1735 err
= nla_parse_nested(linkinfo
, IFLA_INFO_MAX
,
1736 tb
[IFLA_LINKINFO
], ifla_info_policy
);
1740 memset(linkinfo
, 0, sizeof(linkinfo
));
1742 if (linkinfo
[IFLA_INFO_KIND
]) {
1743 nla_strlcpy(kind
, linkinfo
[IFLA_INFO_KIND
], sizeof(kind
));
1744 ops
= rtnl_link_ops_get(kind
);
1751 struct nlattr
*attr
[ops
? ops
->maxtype
+ 1 : 0], **data
= NULL
;
1752 struct net
*dest_net
;
1755 if (ops
->maxtype
&& linkinfo
[IFLA_INFO_DATA
]) {
1756 err
= nla_parse_nested(attr
, ops
->maxtype
,
1757 linkinfo
[IFLA_INFO_DATA
],
1763 if (ops
->validate
) {
1764 err
= ops
->validate(tb
, data
);
1773 if (nlh
->nlmsg_flags
& NLM_F_EXCL
)
1775 if (nlh
->nlmsg_flags
& NLM_F_REPLACE
)
1778 if (linkinfo
[IFLA_INFO_DATA
]) {
1779 if (!ops
|| ops
!= dev
->rtnl_link_ops
||
1783 err
= ops
->changelink(dev
, tb
, data
);
1789 return do_setlink(dev
, ifm
, tb
, ifname
, modified
);
1792 if (!(nlh
->nlmsg_flags
& NLM_F_CREATE
)) {
1793 if (ifm
->ifi_index
== 0 && tb
[IFLA_GROUP
])
1794 return rtnl_group_changelink(net
,
1795 nla_get_u32(tb
[IFLA_GROUP
]),
1802 if (tb
[IFLA_MAP
] || tb
[IFLA_MASTER
] || tb
[IFLA_PROTINFO
])
1806 #ifdef CONFIG_MODULES
1809 request_module("rtnl-link-%s", kind
);
1811 ops
= rtnl_link_ops_get(kind
);
1820 snprintf(ifname
, IFNAMSIZ
, "%s%%d", ops
->kind
);
1822 dest_net
= rtnl_link_get_net(net
, tb
);
1823 if (IS_ERR(dest_net
))
1824 return PTR_ERR(dest_net
);
1826 dev
= rtnl_create_link(net
, dest_net
, ifname
, ops
, tb
);
1830 else if (ops
->newlink
)
1831 err
= ops
->newlink(net
, dev
, tb
, data
);
1833 err
= register_netdevice(dev
);
1835 if (err
< 0 && !IS_ERR(dev
))
1840 err
= rtnl_configure_link(dev
, ifm
);
1842 unregister_netdevice(dev
);
1849 static int rtnl_getlink(struct sk_buff
*skb
, struct nlmsghdr
* nlh
, void *arg
)
1851 struct net
*net
= sock_net(skb
->sk
);
1852 struct ifinfomsg
*ifm
;
1853 char ifname
[IFNAMSIZ
];
1854 struct nlattr
*tb
[IFLA_MAX
+1];
1855 struct net_device
*dev
= NULL
;
1856 struct sk_buff
*nskb
;
1858 u32 ext_filter_mask
= 0;
1860 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFLA_MAX
, ifla_policy
);
1864 if (tb
[IFLA_IFNAME
])
1865 nla_strlcpy(ifname
, tb
[IFLA_IFNAME
], IFNAMSIZ
);
1867 if (tb
[IFLA_EXT_MASK
])
1868 ext_filter_mask
= nla_get_u32(tb
[IFLA_EXT_MASK
]);
1870 ifm
= nlmsg_data(nlh
);
1871 if (ifm
->ifi_index
> 0)
1872 dev
= __dev_get_by_index(net
, ifm
->ifi_index
);
1873 else if (tb
[IFLA_IFNAME
])
1874 dev
= __dev_get_by_name(net
, ifname
);
1881 nskb
= nlmsg_new(if_nlmsg_size(dev
, ext_filter_mask
), GFP_KERNEL
);
1885 err
= rtnl_fill_ifinfo(nskb
, dev
, RTM_NEWLINK
, NETLINK_CB(skb
).pid
,
1886 nlh
->nlmsg_seq
, 0, 0, ext_filter_mask
);
1888 /* -EMSGSIZE implies BUG in if_nlmsg_size */
1889 WARN_ON(err
== -EMSGSIZE
);
1892 err
= rtnl_unicast(nskb
, net
, NETLINK_CB(skb
).pid
);
1897 static u16
rtnl_calcit(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
1899 struct net
*net
= sock_net(skb
->sk
);
1900 struct net_device
*dev
;
1901 struct nlattr
*tb
[IFLA_MAX
+1];
1902 u32 ext_filter_mask
= 0;
1903 u16 min_ifinfo_dump_size
= 0;
1905 if (nlmsg_parse(nlh
, sizeof(struct rtgenmsg
), tb
, IFLA_MAX
,
1906 ifla_policy
) >= 0) {
1907 if (tb
[IFLA_EXT_MASK
])
1908 ext_filter_mask
= nla_get_u32(tb
[IFLA_EXT_MASK
]);
1911 if (!ext_filter_mask
)
1912 return NLMSG_GOODSIZE
;
1914 * traverse the list of net devices and compute the minimum
1915 * buffer size based upon the filter mask.
1917 list_for_each_entry(dev
, &net
->dev_base_head
, dev_list
) {
1918 min_ifinfo_dump_size
= max_t(u16
, min_ifinfo_dump_size
,
1923 return min_ifinfo_dump_size
;
1926 static int rtnl_dump_all(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1929 int s_idx
= cb
->family
;
1933 for (idx
= 1; idx
<= RTNL_FAMILY_MAX
; idx
++) {
1934 int type
= cb
->nlh
->nlmsg_type
-RTM_BASE
;
1935 if (idx
< s_idx
|| idx
== PF_PACKET
)
1937 if (rtnl_msg_handlers
[idx
] == NULL
||
1938 rtnl_msg_handlers
[idx
][type
].dumpit
== NULL
)
1941 memset(&cb
->args
[0], 0, sizeof(cb
->args
));
1942 if (rtnl_msg_handlers
[idx
][type
].dumpit(skb
, cb
))
1950 void rtmsg_ifinfo(int type
, struct net_device
*dev
, unsigned change
)
1952 struct net
*net
= dev_net(dev
);
1953 struct sk_buff
*skb
;
1955 size_t if_info_size
;
1957 skb
= nlmsg_new((if_info_size
= if_nlmsg_size(dev
, 0)), GFP_KERNEL
);
1961 err
= rtnl_fill_ifinfo(skb
, dev
, type
, 0, 0, change
, 0, 0);
1963 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
1964 WARN_ON(err
== -EMSGSIZE
);
1968 rtnl_notify(skb
, net
, 0, RTNLGRP_LINK
, NULL
, GFP_KERNEL
);
1972 rtnl_set_sk_err(net
, RTNLGRP_LINK
, err
);
1975 /* Protected by RTNL sempahore. */
1976 static struct rtattr
**rta_buf
;
1977 static int rtattr_max
;
1979 /* Process one rtnetlink message. */
1981 static int rtnetlink_rcv_msg(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
1983 struct net
*net
= sock_net(skb
->sk
);
1984 rtnl_doit_func doit
;
1991 type
= nlh
->nlmsg_type
;
1997 /* All the messages must have at least 1 byte length */
1998 if (nlh
->nlmsg_len
< NLMSG_LENGTH(sizeof(struct rtgenmsg
)))
2001 family
= ((struct rtgenmsg
*)NLMSG_DATA(nlh
))->rtgen_family
;
2005 if (kind
!= 2 && !capable(CAP_NET_ADMIN
))
2008 if (kind
== 2 && nlh
->nlmsg_flags
&NLM_F_DUMP
) {
2010 rtnl_dumpit_func dumpit
;
2011 rtnl_calcit_func calcit
;
2012 u16 min_dump_alloc
= 0;
2014 dumpit
= rtnl_get_dumpit(family
, type
);
2017 calcit
= rtnl_get_calcit(family
, type
);
2019 min_dump_alloc
= calcit(skb
, nlh
);
2024 struct netlink_dump_control c
= {
2026 .min_dump_alloc
= min_dump_alloc
,
2028 err
= netlink_dump_start(rtnl
, skb
, nlh
, &c
);
2034 memset(rta_buf
, 0, (rtattr_max
* sizeof(struct rtattr
*)));
2036 min_len
= rtm_min
[sz_idx
];
2037 if (nlh
->nlmsg_len
< min_len
)
2040 if (nlh
->nlmsg_len
> min_len
) {
2041 int attrlen
= nlh
->nlmsg_len
- NLMSG_ALIGN(min_len
);
2042 struct rtattr
*attr
= (void *)nlh
+ NLMSG_ALIGN(min_len
);
2044 while (RTA_OK(attr
, attrlen
)) {
2045 unsigned flavor
= attr
->rta_type
;
2047 if (flavor
> rta_max
[sz_idx
])
2049 rta_buf
[flavor
-1] = attr
;
2051 attr
= RTA_NEXT(attr
, attrlen
);
2055 doit
= rtnl_get_doit(family
, type
);
2059 return doit(skb
, nlh
, (void *)&rta_buf
[0]);
2062 static void rtnetlink_rcv(struct sk_buff
*skb
)
2065 netlink_rcv_skb(skb
, &rtnetlink_rcv_msg
);
2069 static int rtnetlink_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
2071 struct net_device
*dev
= ptr
;
2077 case NETDEV_POST_INIT
:
2078 case NETDEV_REGISTER
:
2080 case NETDEV_PRE_TYPE_CHANGE
:
2081 case NETDEV_GOING_DOWN
:
2082 case NETDEV_UNREGISTER
:
2083 case NETDEV_UNREGISTER_BATCH
:
2084 case NETDEV_RELEASE
:
2088 rtmsg_ifinfo(RTM_NEWLINK
, dev
, 0);
2094 static struct notifier_block rtnetlink_dev_notifier
= {
2095 .notifier_call
= rtnetlink_event
,
2099 static int __net_init
rtnetlink_net_init(struct net
*net
)
2102 sk
= netlink_kernel_create(net
, NETLINK_ROUTE
, RTNLGRP_MAX
,
2103 rtnetlink_rcv
, &rtnl_mutex
, THIS_MODULE
);
2110 static void __net_exit
rtnetlink_net_exit(struct net
*net
)
2112 netlink_kernel_release(net
->rtnl
);
2116 static struct pernet_operations rtnetlink_net_ops
= {
2117 .init
= rtnetlink_net_init
,
2118 .exit
= rtnetlink_net_exit
,
2121 void __init
rtnetlink_init(void)
2126 for (i
= 0; i
< ARRAY_SIZE(rta_max
); i
++)
2127 if (rta_max
[i
] > rtattr_max
)
2128 rtattr_max
= rta_max
[i
];
2129 rta_buf
= kmalloc(rtattr_max
* sizeof(struct rtattr
*), GFP_KERNEL
);
2131 panic("rtnetlink_init: cannot allocate rta_buf\n");
2133 if (register_pernet_subsys(&rtnetlink_net_ops
))
2134 panic("rtnetlink_init: cannot initialize rtnetlink\n");
2136 netlink_set_nonroot(NETLINK_ROUTE
, NL_NONROOT_RECV
);
2137 register_netdevice_notifier(&rtnetlink_dev_notifier
);
2139 rtnl_register(PF_UNSPEC
, RTM_GETLINK
, rtnl_getlink
,
2140 rtnl_dump_ifinfo
, rtnl_calcit
);
2141 rtnl_register(PF_UNSPEC
, RTM_SETLINK
, rtnl_setlink
, NULL
, NULL
);
2142 rtnl_register(PF_UNSPEC
, RTM_NEWLINK
, rtnl_newlink
, NULL
, NULL
);
2143 rtnl_register(PF_UNSPEC
, RTM_DELLINK
, rtnl_dellink
, NULL
, NULL
);
2145 rtnl_register(PF_UNSPEC
, RTM_GETADDR
, NULL
, rtnl_dump_all
, NULL
);
2146 rtnl_register(PF_UNSPEC
, RTM_GETROUTE
, NULL
, rtnl_dump_all
, NULL
);