2 * Linux IPv6 multicast routing support for BSD pim6sd
3 * Based on net/ipv4/ipmr.c.
5 * (c) 2004 Mickael Hoerdt, <hoerdt@clarinet.u-strasbg.fr>
6 * LSIIT Laboratory, Strasbourg, France
7 * (c) 2004 Jean-Philippe Andriot, <jean-philippe.andriot@6WIND.com>
9 * Copyright (C)2007,2008 USAGI/WIDE Project
10 * YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version
15 * 2 of the License, or (at your option) any later version.
19 #include <linux/uaccess.h>
20 #include <linux/types.h>
21 #include <linux/sched.h>
22 #include <linux/errno.h>
23 #include <linux/timer.h>
25 #include <linux/kernel.h>
26 #include <linux/fcntl.h>
27 #include <linux/stat.h>
28 #include <linux/socket.h>
29 #include <linux/inet.h>
30 #include <linux/netdevice.h>
31 #include <linux/inetdevice.h>
32 #include <linux/proc_fs.h>
33 #include <linux/seq_file.h>
34 #include <linux/init.h>
35 #include <linux/slab.h>
36 #include <linux/compat.h>
37 #include <net/protocol.h>
38 #include <linux/skbuff.h>
41 #include <linux/notifier.h>
42 #include <linux/if_arp.h>
43 #include <net/checksum.h>
44 #include <net/netlink.h>
45 #include <net/fib_rules.h>
48 #include <net/ip6_route.h>
49 #include <linux/mroute6.h>
50 #include <linux/pim.h>
51 #include <net/addrconf.h>
52 #include <linux/netfilter_ipv6.h>
53 #include <linux/export.h>
54 #include <net/ip6_checksum.h>
55 #include <linux/netconf.h>
58 struct list_head list
;
61 struct sock
*mroute6_sk
;
62 struct timer_list ipmr_expire_timer
;
63 struct list_head mfc6_unres_queue
;
64 struct list_head mfc6_cache_array
[MFC6_LINES
];
65 struct mif_device vif6_table
[MAXMIFS
];
67 atomic_t cache_resolve_queue_len
;
68 bool mroute_do_assert
;
70 #ifdef CONFIG_IPV6_PIMSM_V2
71 int mroute_reg_vif_num
;
76 struct fib_rule common
;
80 struct mr6_table
*mrt
;
83 /* Big lock, protecting vif table, mrt cache and mroute socket state.
84 Note that the changes are semaphored via rtnl_lock.
87 static DEFINE_RWLOCK(mrt_lock
);
90 * Multicast router control variables
93 #define MIF_EXISTS(_mrt, _idx) ((_mrt)->vif6_table[_idx].dev != NULL)
95 /* Special spinlock for queue of unresolved entries */
96 static DEFINE_SPINLOCK(mfc_unres_lock
);
98 /* We return to original Alan's scheme. Hash table of resolved
99 entries is changed only in process context and protected
100 with weak lock mrt_lock. Queue of unresolved entries is protected
101 with strong spinlock mfc_unres_lock.
103 In this case data path is free of exclusive locks at all.
106 static struct kmem_cache
*mrt_cachep __read_mostly
;
108 static struct mr6_table
*ip6mr_new_table(struct net
*net
, u32 id
);
109 static void ip6mr_free_table(struct mr6_table
*mrt
);
111 static void ip6_mr_forward(struct net
*net
, struct mr6_table
*mrt
,
112 struct sk_buff
*skb
, struct mfc6_cache
*cache
);
113 static int ip6mr_cache_report(struct mr6_table
*mrt
, struct sk_buff
*pkt
,
114 mifi_t mifi
, int assert);
115 static int __ip6mr_fill_mroute(struct mr6_table
*mrt
, struct sk_buff
*skb
,
116 struct mfc6_cache
*c
, struct rtmsg
*rtm
);
117 static void mr6_netlink_event(struct mr6_table
*mrt
, struct mfc6_cache
*mfc
,
119 static void mrt6msg_netlink_event(struct mr6_table
*mrt
, struct sk_buff
*pkt
);
120 static int ip6mr_rtm_dumproute(struct sk_buff
*skb
,
121 struct netlink_callback
*cb
);
122 static void mroute_clean_tables(struct mr6_table
*mrt
, bool all
);
123 static void ipmr_expire_process(struct timer_list
*t
);
125 #ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES
126 #define ip6mr_for_each_table(mrt, net) \
127 list_for_each_entry_rcu(mrt, &net->ipv6.mr6_tables, list)
129 static struct mr6_table
*ip6mr_get_table(struct net
*net
, u32 id
)
131 struct mr6_table
*mrt
;
133 ip6mr_for_each_table(mrt
, net
) {
140 static int ip6mr_fib_lookup(struct net
*net
, struct flowi6
*flp6
,
141 struct mr6_table
**mrt
)
144 struct ip6mr_result res
;
145 struct fib_lookup_arg arg
= {
147 .flags
= FIB_LOOKUP_NOREF
,
150 err
= fib_rules_lookup(net
->ipv6
.mr6_rules_ops
,
151 flowi6_to_flowi(flp6
), 0, &arg
);
158 static int ip6mr_rule_action(struct fib_rule
*rule
, struct flowi
*flp
,
159 int flags
, struct fib_lookup_arg
*arg
)
161 struct ip6mr_result
*res
= arg
->result
;
162 struct mr6_table
*mrt
;
164 switch (rule
->action
) {
167 case FR_ACT_UNREACHABLE
:
169 case FR_ACT_PROHIBIT
:
171 case FR_ACT_BLACKHOLE
:
176 mrt
= ip6mr_get_table(rule
->fr_net
, rule
->table
);
183 static int ip6mr_rule_match(struct fib_rule
*rule
, struct flowi
*flp
, int flags
)
188 static const struct nla_policy ip6mr_rule_policy
[FRA_MAX
+ 1] = {
192 static int ip6mr_rule_configure(struct fib_rule
*rule
, struct sk_buff
*skb
,
193 struct fib_rule_hdr
*frh
, struct nlattr
**tb
)
198 static int ip6mr_rule_compare(struct fib_rule
*rule
, struct fib_rule_hdr
*frh
,
204 static int ip6mr_rule_fill(struct fib_rule
*rule
, struct sk_buff
*skb
,
205 struct fib_rule_hdr
*frh
)
213 static const struct fib_rules_ops __net_initconst ip6mr_rules_ops_template
= {
214 .family
= RTNL_FAMILY_IP6MR
,
215 .rule_size
= sizeof(struct ip6mr_rule
),
216 .addr_size
= sizeof(struct in6_addr
),
217 .action
= ip6mr_rule_action
,
218 .match
= ip6mr_rule_match
,
219 .configure
= ip6mr_rule_configure
,
220 .compare
= ip6mr_rule_compare
,
221 .fill
= ip6mr_rule_fill
,
222 .nlgroup
= RTNLGRP_IPV6_RULE
,
223 .policy
= ip6mr_rule_policy
,
224 .owner
= THIS_MODULE
,
227 static int __net_init
ip6mr_rules_init(struct net
*net
)
229 struct fib_rules_ops
*ops
;
230 struct mr6_table
*mrt
;
233 ops
= fib_rules_register(&ip6mr_rules_ops_template
, net
);
237 INIT_LIST_HEAD(&net
->ipv6
.mr6_tables
);
239 mrt
= ip6mr_new_table(net
, RT6_TABLE_DFLT
);
245 err
= fib_default_rule_add(ops
, 0x7fff, RT6_TABLE_DFLT
, 0);
249 net
->ipv6
.mr6_rules_ops
= ops
;
253 ip6mr_free_table(mrt
);
255 fib_rules_unregister(ops
);
259 static void __net_exit
ip6mr_rules_exit(struct net
*net
)
261 struct mr6_table
*mrt
, *next
;
264 list_for_each_entry_safe(mrt
, next
, &net
->ipv6
.mr6_tables
, list
) {
265 list_del(&mrt
->list
);
266 ip6mr_free_table(mrt
);
268 fib_rules_unregister(net
->ipv6
.mr6_rules_ops
);
272 #define ip6mr_for_each_table(mrt, net) \
273 for (mrt = net->ipv6.mrt6; mrt; mrt = NULL)
275 static struct mr6_table
*ip6mr_get_table(struct net
*net
, u32 id
)
277 return net
->ipv6
.mrt6
;
280 static int ip6mr_fib_lookup(struct net
*net
, struct flowi6
*flp6
,
281 struct mr6_table
**mrt
)
283 *mrt
= net
->ipv6
.mrt6
;
287 static int __net_init
ip6mr_rules_init(struct net
*net
)
289 net
->ipv6
.mrt6
= ip6mr_new_table(net
, RT6_TABLE_DFLT
);
290 return net
->ipv6
.mrt6
? 0 : -ENOMEM
;
293 static void __net_exit
ip6mr_rules_exit(struct net
*net
)
296 ip6mr_free_table(net
->ipv6
.mrt6
);
297 net
->ipv6
.mrt6
= NULL
;
302 static struct mr6_table
*ip6mr_new_table(struct net
*net
, u32 id
)
304 struct mr6_table
*mrt
;
307 mrt
= ip6mr_get_table(net
, id
);
311 mrt
= kzalloc(sizeof(*mrt
), GFP_KERNEL
);
315 write_pnet(&mrt
->net
, net
);
317 /* Forwarding cache */
318 for (i
= 0; i
< MFC6_LINES
; i
++)
319 INIT_LIST_HEAD(&mrt
->mfc6_cache_array
[i
]);
321 INIT_LIST_HEAD(&mrt
->mfc6_unres_queue
);
323 timer_setup(&mrt
->ipmr_expire_timer
, ipmr_expire_process
, 0);
325 #ifdef CONFIG_IPV6_PIMSM_V2
326 mrt
->mroute_reg_vif_num
= -1;
328 #ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES
329 list_add_tail_rcu(&mrt
->list
, &net
->ipv6
.mr6_tables
);
334 static void ip6mr_free_table(struct mr6_table
*mrt
)
336 del_timer_sync(&mrt
->ipmr_expire_timer
);
337 mroute_clean_tables(mrt
, true);
341 #ifdef CONFIG_PROC_FS
343 struct ipmr_mfc_iter
{
344 struct seq_net_private p
;
345 struct mr6_table
*mrt
;
346 struct list_head
*cache
;
351 static struct mfc6_cache
*ipmr_mfc_seq_idx(struct net
*net
,
352 struct ipmr_mfc_iter
*it
, loff_t pos
)
354 struct mr6_table
*mrt
= it
->mrt
;
355 struct mfc6_cache
*mfc
;
357 read_lock(&mrt_lock
);
358 for (it
->ct
= 0; it
->ct
< MFC6_LINES
; it
->ct
++) {
359 it
->cache
= &mrt
->mfc6_cache_array
[it
->ct
];
360 list_for_each_entry(mfc
, it
->cache
, list
)
364 read_unlock(&mrt_lock
);
366 spin_lock_bh(&mfc_unres_lock
);
367 it
->cache
= &mrt
->mfc6_unres_queue
;
368 list_for_each_entry(mfc
, it
->cache
, list
)
371 spin_unlock_bh(&mfc_unres_lock
);
378 * The /proc interfaces to multicast routing /proc/ip6_mr_cache /proc/ip6_mr_vif
381 struct ipmr_vif_iter
{
382 struct seq_net_private p
;
383 struct mr6_table
*mrt
;
387 static struct mif_device
*ip6mr_vif_seq_idx(struct net
*net
,
388 struct ipmr_vif_iter
*iter
,
391 struct mr6_table
*mrt
= iter
->mrt
;
393 for (iter
->ct
= 0; iter
->ct
< mrt
->maxvif
; ++iter
->ct
) {
394 if (!MIF_EXISTS(mrt
, iter
->ct
))
397 return &mrt
->vif6_table
[iter
->ct
];
402 static void *ip6mr_vif_seq_start(struct seq_file
*seq
, loff_t
*pos
)
405 struct ipmr_vif_iter
*iter
= seq
->private;
406 struct net
*net
= seq_file_net(seq
);
407 struct mr6_table
*mrt
;
409 mrt
= ip6mr_get_table(net
, RT6_TABLE_DFLT
);
411 return ERR_PTR(-ENOENT
);
415 read_lock(&mrt_lock
);
416 return *pos
? ip6mr_vif_seq_idx(net
, seq
->private, *pos
- 1)
420 static void *ip6mr_vif_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
422 struct ipmr_vif_iter
*iter
= seq
->private;
423 struct net
*net
= seq_file_net(seq
);
424 struct mr6_table
*mrt
= iter
->mrt
;
427 if (v
== SEQ_START_TOKEN
)
428 return ip6mr_vif_seq_idx(net
, iter
, 0);
430 while (++iter
->ct
< mrt
->maxvif
) {
431 if (!MIF_EXISTS(mrt
, iter
->ct
))
433 return &mrt
->vif6_table
[iter
->ct
];
438 static void ip6mr_vif_seq_stop(struct seq_file
*seq
, void *v
)
441 read_unlock(&mrt_lock
);
444 static int ip6mr_vif_seq_show(struct seq_file
*seq
, void *v
)
446 struct ipmr_vif_iter
*iter
= seq
->private;
447 struct mr6_table
*mrt
= iter
->mrt
;
449 if (v
== SEQ_START_TOKEN
) {
451 "Interface BytesIn PktsIn BytesOut PktsOut Flags\n");
453 const struct mif_device
*vif
= v
;
454 const char *name
= vif
->dev
? vif
->dev
->name
: "none";
457 "%2td %-10s %8ld %7ld %8ld %7ld %05X\n",
458 vif
- mrt
->vif6_table
,
459 name
, vif
->bytes_in
, vif
->pkt_in
,
460 vif
->bytes_out
, vif
->pkt_out
,
466 static const struct seq_operations ip6mr_vif_seq_ops
= {
467 .start
= ip6mr_vif_seq_start
,
468 .next
= ip6mr_vif_seq_next
,
469 .stop
= ip6mr_vif_seq_stop
,
470 .show
= ip6mr_vif_seq_show
,
473 static int ip6mr_vif_open(struct inode
*inode
, struct file
*file
)
475 return seq_open_net(inode
, file
, &ip6mr_vif_seq_ops
,
476 sizeof(struct ipmr_vif_iter
));
479 static const struct file_operations ip6mr_vif_fops
= {
480 .owner
= THIS_MODULE
,
481 .open
= ip6mr_vif_open
,
484 .release
= seq_release_net
,
487 static void *ipmr_mfc_seq_start(struct seq_file
*seq
, loff_t
*pos
)
489 struct ipmr_mfc_iter
*it
= seq
->private;
490 struct net
*net
= seq_file_net(seq
);
491 struct mr6_table
*mrt
;
493 mrt
= ip6mr_get_table(net
, RT6_TABLE_DFLT
);
495 return ERR_PTR(-ENOENT
);
499 return *pos
? ipmr_mfc_seq_idx(net
, seq
->private, *pos
- 1)
503 static void *ipmr_mfc_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
505 struct mfc6_cache
*mfc
= v
;
506 struct ipmr_mfc_iter
*it
= seq
->private;
507 struct net
*net
= seq_file_net(seq
);
508 struct mr6_table
*mrt
= it
->mrt
;
512 if (v
== SEQ_START_TOKEN
)
513 return ipmr_mfc_seq_idx(net
, seq
->private, 0);
515 if (mfc
->list
.next
!= it
->cache
)
516 return list_entry(mfc
->list
.next
, struct mfc6_cache
, list
);
518 if (it
->cache
== &mrt
->mfc6_unres_queue
)
521 BUG_ON(it
->cache
!= &mrt
->mfc6_cache_array
[it
->ct
]);
523 while (++it
->ct
< MFC6_LINES
) {
524 it
->cache
= &mrt
->mfc6_cache_array
[it
->ct
];
525 if (list_empty(it
->cache
))
527 return list_first_entry(it
->cache
, struct mfc6_cache
, list
);
530 /* exhausted cache_array, show unresolved */
531 read_unlock(&mrt_lock
);
532 it
->cache
= &mrt
->mfc6_unres_queue
;
535 spin_lock_bh(&mfc_unres_lock
);
536 if (!list_empty(it
->cache
))
537 return list_first_entry(it
->cache
, struct mfc6_cache
, list
);
540 spin_unlock_bh(&mfc_unres_lock
);
546 static void ipmr_mfc_seq_stop(struct seq_file
*seq
, void *v
)
548 struct ipmr_mfc_iter
*it
= seq
->private;
549 struct mr6_table
*mrt
= it
->mrt
;
551 if (it
->cache
== &mrt
->mfc6_unres_queue
)
552 spin_unlock_bh(&mfc_unres_lock
);
553 else if (it
->cache
== &mrt
->mfc6_cache_array
[it
->ct
])
554 read_unlock(&mrt_lock
);
557 static int ipmr_mfc_seq_show(struct seq_file
*seq
, void *v
)
561 if (v
== SEQ_START_TOKEN
) {
565 "Iif Pkts Bytes Wrong Oifs\n");
567 const struct mfc6_cache
*mfc
= v
;
568 const struct ipmr_mfc_iter
*it
= seq
->private;
569 struct mr6_table
*mrt
= it
->mrt
;
571 seq_printf(seq
, "%pI6 %pI6 %-3hd",
572 &mfc
->mf6c_mcastgrp
, &mfc
->mf6c_origin
,
575 if (it
->cache
!= &mrt
->mfc6_unres_queue
) {
576 seq_printf(seq
, " %8lu %8lu %8lu",
578 mfc
->mfc_un
.res
.bytes
,
579 mfc
->mfc_un
.res
.wrong_if
);
580 for (n
= mfc
->mfc_un
.res
.minvif
;
581 n
< mfc
->mfc_un
.res
.maxvif
; n
++) {
582 if (MIF_EXISTS(mrt
, n
) &&
583 mfc
->mfc_un
.res
.ttls
[n
] < 255)
586 n
, mfc
->mfc_un
.res
.ttls
[n
]);
589 /* unresolved mfc_caches don't contain
590 * pkt, bytes and wrong_if values
592 seq_printf(seq
, " %8lu %8lu %8lu", 0ul, 0ul, 0ul);
599 static const struct seq_operations ipmr_mfc_seq_ops
= {
600 .start
= ipmr_mfc_seq_start
,
601 .next
= ipmr_mfc_seq_next
,
602 .stop
= ipmr_mfc_seq_stop
,
603 .show
= ipmr_mfc_seq_show
,
606 static int ipmr_mfc_open(struct inode
*inode
, struct file
*file
)
608 return seq_open_net(inode
, file
, &ipmr_mfc_seq_ops
,
609 sizeof(struct ipmr_mfc_iter
));
612 static const struct file_operations ip6mr_mfc_fops
= {
613 .owner
= THIS_MODULE
,
614 .open
= ipmr_mfc_open
,
617 .release
= seq_release_net
,
621 #ifdef CONFIG_IPV6_PIMSM_V2
623 static int pim6_rcv(struct sk_buff
*skb
)
625 struct pimreghdr
*pim
;
626 struct ipv6hdr
*encap
;
627 struct net_device
*reg_dev
= NULL
;
628 struct net
*net
= dev_net(skb
->dev
);
629 struct mr6_table
*mrt
;
630 struct flowi6 fl6
= {
631 .flowi6_iif
= skb
->dev
->ifindex
,
632 .flowi6_mark
= skb
->mark
,
636 if (!pskb_may_pull(skb
, sizeof(*pim
) + sizeof(*encap
)))
639 pim
= (struct pimreghdr
*)skb_transport_header(skb
);
640 if (pim
->type
!= ((PIM_VERSION
<< 4) | PIM_TYPE_REGISTER
) ||
641 (pim
->flags
& PIM_NULL_REGISTER
) ||
642 (csum_ipv6_magic(&ipv6_hdr(skb
)->saddr
, &ipv6_hdr(skb
)->daddr
,
643 sizeof(*pim
), IPPROTO_PIM
,
644 csum_partial((void *)pim
, sizeof(*pim
), 0)) &&
645 csum_fold(skb_checksum(skb
, 0, skb
->len
, 0))))
648 /* check if the inner packet is destined to mcast group */
649 encap
= (struct ipv6hdr
*)(skb_transport_header(skb
) +
652 if (!ipv6_addr_is_multicast(&encap
->daddr
) ||
653 encap
->payload_len
== 0 ||
654 ntohs(encap
->payload_len
) + sizeof(*pim
) > skb
->len
)
657 if (ip6mr_fib_lookup(net
, &fl6
, &mrt
) < 0)
659 reg_vif_num
= mrt
->mroute_reg_vif_num
;
661 read_lock(&mrt_lock
);
662 if (reg_vif_num
>= 0)
663 reg_dev
= mrt
->vif6_table
[reg_vif_num
].dev
;
666 read_unlock(&mrt_lock
);
671 skb
->mac_header
= skb
->network_header
;
672 skb_pull(skb
, (u8
*)encap
- skb
->data
);
673 skb_reset_network_header(skb
);
674 skb
->protocol
= htons(ETH_P_IPV6
);
675 skb
->ip_summed
= CHECKSUM_NONE
;
677 skb_tunnel_rx(skb
, reg_dev
, dev_net(reg_dev
));
688 static const struct inet6_protocol pim6_protocol
= {
692 /* Service routines creating virtual interfaces: PIMREG */
694 static netdev_tx_t
reg_vif_xmit(struct sk_buff
*skb
,
695 struct net_device
*dev
)
697 struct net
*net
= dev_net(dev
);
698 struct mr6_table
*mrt
;
699 struct flowi6 fl6
= {
700 .flowi6_oif
= dev
->ifindex
,
701 .flowi6_iif
= skb
->skb_iif
? : LOOPBACK_IFINDEX
,
702 .flowi6_mark
= skb
->mark
,
706 err
= ip6mr_fib_lookup(net
, &fl6
, &mrt
);
712 read_lock(&mrt_lock
);
713 dev
->stats
.tx_bytes
+= skb
->len
;
714 dev
->stats
.tx_packets
++;
715 ip6mr_cache_report(mrt
, skb
, mrt
->mroute_reg_vif_num
, MRT6MSG_WHOLEPKT
);
716 read_unlock(&mrt_lock
);
721 static int reg_vif_get_iflink(const struct net_device
*dev
)
726 static const struct net_device_ops reg_vif_netdev_ops
= {
727 .ndo_start_xmit
= reg_vif_xmit
,
728 .ndo_get_iflink
= reg_vif_get_iflink
,
731 static void reg_vif_setup(struct net_device
*dev
)
733 dev
->type
= ARPHRD_PIMREG
;
734 dev
->mtu
= 1500 - sizeof(struct ipv6hdr
) - 8;
735 dev
->flags
= IFF_NOARP
;
736 dev
->netdev_ops
= ®_vif_netdev_ops
;
737 dev
->needs_free_netdev
= true;
738 dev
->features
|= NETIF_F_NETNS_LOCAL
;
741 static struct net_device
*ip6mr_reg_vif(struct net
*net
, struct mr6_table
*mrt
)
743 struct net_device
*dev
;
746 if (mrt
->id
== RT6_TABLE_DFLT
)
747 sprintf(name
, "pim6reg");
749 sprintf(name
, "pim6reg%u", mrt
->id
);
751 dev
= alloc_netdev(0, name
, NET_NAME_UNKNOWN
, reg_vif_setup
);
755 dev_net_set(dev
, net
);
757 if (register_netdevice(dev
)) {
769 unregister_netdevice(dev
);
778 static int mif6_delete(struct mr6_table
*mrt
, int vifi
, int notify
,
779 struct list_head
*head
)
781 struct mif_device
*v
;
782 struct net_device
*dev
;
783 struct inet6_dev
*in6_dev
;
785 if (vifi
< 0 || vifi
>= mrt
->maxvif
)
786 return -EADDRNOTAVAIL
;
788 v
= &mrt
->vif6_table
[vifi
];
790 write_lock_bh(&mrt_lock
);
795 write_unlock_bh(&mrt_lock
);
796 return -EADDRNOTAVAIL
;
799 #ifdef CONFIG_IPV6_PIMSM_V2
800 if (vifi
== mrt
->mroute_reg_vif_num
)
801 mrt
->mroute_reg_vif_num
= -1;
804 if (vifi
+ 1 == mrt
->maxvif
) {
806 for (tmp
= vifi
- 1; tmp
>= 0; tmp
--) {
807 if (MIF_EXISTS(mrt
, tmp
))
810 mrt
->maxvif
= tmp
+ 1;
813 write_unlock_bh(&mrt_lock
);
815 dev_set_allmulti(dev
, -1);
817 in6_dev
= __in6_dev_get(dev
);
819 in6_dev
->cnf
.mc_forwarding
--;
820 inet6_netconf_notify_devconf(dev_net(dev
), RTM_NEWNETCONF
,
821 NETCONFA_MC_FORWARDING
,
822 dev
->ifindex
, &in6_dev
->cnf
);
825 if ((v
->flags
& MIFF_REGISTER
) && !notify
)
826 unregister_netdevice_queue(dev
, head
);
832 static inline void ip6mr_cache_free(struct mfc6_cache
*c
)
834 kmem_cache_free(mrt_cachep
, c
);
837 /* Destroy an unresolved cache entry, killing queued skbs
838 and reporting error to netlink readers.
841 static void ip6mr_destroy_unres(struct mr6_table
*mrt
, struct mfc6_cache
*c
)
843 struct net
*net
= read_pnet(&mrt
->net
);
846 atomic_dec(&mrt
->cache_resolve_queue_len
);
848 while ((skb
= skb_dequeue(&c
->mfc_un
.unres
.unresolved
)) != NULL
) {
849 if (ipv6_hdr(skb
)->version
== 0) {
850 struct nlmsghdr
*nlh
= skb_pull(skb
,
851 sizeof(struct ipv6hdr
));
852 nlh
->nlmsg_type
= NLMSG_ERROR
;
853 nlh
->nlmsg_len
= nlmsg_msg_size(sizeof(struct nlmsgerr
));
854 skb_trim(skb
, nlh
->nlmsg_len
);
855 ((struct nlmsgerr
*)nlmsg_data(nlh
))->error
= -ETIMEDOUT
;
856 rtnl_unicast(skb
, net
, NETLINK_CB(skb
).portid
);
865 /* Timer process for all the unresolved queue. */
867 static void ipmr_do_expire_process(struct mr6_table
*mrt
)
869 unsigned long now
= jiffies
;
870 unsigned long expires
= 10 * HZ
;
871 struct mfc6_cache
*c
, *next
;
873 list_for_each_entry_safe(c
, next
, &mrt
->mfc6_unres_queue
, list
) {
874 if (time_after(c
->mfc_un
.unres
.expires
, now
)) {
876 unsigned long interval
= c
->mfc_un
.unres
.expires
- now
;
877 if (interval
< expires
)
883 mr6_netlink_event(mrt
, c
, RTM_DELROUTE
);
884 ip6mr_destroy_unres(mrt
, c
);
887 if (!list_empty(&mrt
->mfc6_unres_queue
))
888 mod_timer(&mrt
->ipmr_expire_timer
, jiffies
+ expires
);
891 static void ipmr_expire_process(struct timer_list
*t
)
893 struct mr6_table
*mrt
= from_timer(mrt
, t
, ipmr_expire_timer
);
895 if (!spin_trylock(&mfc_unres_lock
)) {
896 mod_timer(&mrt
->ipmr_expire_timer
, jiffies
+ 1);
900 if (!list_empty(&mrt
->mfc6_unres_queue
))
901 ipmr_do_expire_process(mrt
);
903 spin_unlock(&mfc_unres_lock
);
906 /* Fill oifs list. It is called under write locked mrt_lock. */
908 static void ip6mr_update_thresholds(struct mr6_table
*mrt
, struct mfc6_cache
*cache
,
913 cache
->mfc_un
.res
.minvif
= MAXMIFS
;
914 cache
->mfc_un
.res
.maxvif
= 0;
915 memset(cache
->mfc_un
.res
.ttls
, 255, MAXMIFS
);
917 for (vifi
= 0; vifi
< mrt
->maxvif
; vifi
++) {
918 if (MIF_EXISTS(mrt
, vifi
) &&
919 ttls
[vifi
] && ttls
[vifi
] < 255) {
920 cache
->mfc_un
.res
.ttls
[vifi
] = ttls
[vifi
];
921 if (cache
->mfc_un
.res
.minvif
> vifi
)
922 cache
->mfc_un
.res
.minvif
= vifi
;
923 if (cache
->mfc_un
.res
.maxvif
<= vifi
)
924 cache
->mfc_un
.res
.maxvif
= vifi
+ 1;
927 cache
->mfc_un
.res
.lastuse
= jiffies
;
930 static int mif6_add(struct net
*net
, struct mr6_table
*mrt
,
931 struct mif6ctl
*vifc
, int mrtsock
)
933 int vifi
= vifc
->mif6c_mifi
;
934 struct mif_device
*v
= &mrt
->vif6_table
[vifi
];
935 struct net_device
*dev
;
936 struct inet6_dev
*in6_dev
;
940 if (MIF_EXISTS(mrt
, vifi
))
943 switch (vifc
->mif6c_flags
) {
944 #ifdef CONFIG_IPV6_PIMSM_V2
947 * Special Purpose VIF in PIM
948 * All the packets will be sent to the daemon
950 if (mrt
->mroute_reg_vif_num
>= 0)
952 dev
= ip6mr_reg_vif(net
, mrt
);
955 err
= dev_set_allmulti(dev
, 1);
957 unregister_netdevice(dev
);
964 dev
= dev_get_by_index(net
, vifc
->mif6c_pifi
);
966 return -EADDRNOTAVAIL
;
967 err
= dev_set_allmulti(dev
, 1);
977 in6_dev
= __in6_dev_get(dev
);
979 in6_dev
->cnf
.mc_forwarding
++;
980 inet6_netconf_notify_devconf(dev_net(dev
), RTM_NEWNETCONF
,
981 NETCONFA_MC_FORWARDING
,
982 dev
->ifindex
, &in6_dev
->cnf
);
986 * Fill in the VIF structures
988 v
->rate_limit
= vifc
->vifc_rate_limit
;
989 v
->flags
= vifc
->mif6c_flags
;
991 v
->flags
|= VIFF_STATIC
;
992 v
->threshold
= vifc
->vifc_threshold
;
997 v
->link
= dev
->ifindex
;
998 if (v
->flags
& MIFF_REGISTER
)
999 v
->link
= dev_get_iflink(dev
);
1001 /* And finish update writing critical data */
1002 write_lock_bh(&mrt_lock
);
1004 #ifdef CONFIG_IPV6_PIMSM_V2
1005 if (v
->flags
& MIFF_REGISTER
)
1006 mrt
->mroute_reg_vif_num
= vifi
;
1008 if (vifi
+ 1 > mrt
->maxvif
)
1009 mrt
->maxvif
= vifi
+ 1;
1010 write_unlock_bh(&mrt_lock
);
1014 static struct mfc6_cache
*ip6mr_cache_find(struct mr6_table
*mrt
,
1015 const struct in6_addr
*origin
,
1016 const struct in6_addr
*mcastgrp
)
1018 int line
= MFC6_HASH(mcastgrp
, origin
);
1019 struct mfc6_cache
*c
;
1021 list_for_each_entry(c
, &mrt
->mfc6_cache_array
[line
], list
) {
1022 if (ipv6_addr_equal(&c
->mf6c_origin
, origin
) &&
1023 ipv6_addr_equal(&c
->mf6c_mcastgrp
, mcastgrp
))
1029 /* Look for a (*,*,oif) entry */
1030 static struct mfc6_cache
*ip6mr_cache_find_any_parent(struct mr6_table
*mrt
,
1033 int line
= MFC6_HASH(&in6addr_any
, &in6addr_any
);
1034 struct mfc6_cache
*c
;
1036 list_for_each_entry(c
, &mrt
->mfc6_cache_array
[line
], list
)
1037 if (ipv6_addr_any(&c
->mf6c_origin
) &&
1038 ipv6_addr_any(&c
->mf6c_mcastgrp
) &&
1039 (c
->mfc_un
.res
.ttls
[mifi
] < 255))
1045 /* Look for a (*,G) entry */
1046 static struct mfc6_cache
*ip6mr_cache_find_any(struct mr6_table
*mrt
,
1047 struct in6_addr
*mcastgrp
,
1050 int line
= MFC6_HASH(mcastgrp
, &in6addr_any
);
1051 struct mfc6_cache
*c
, *proxy
;
1053 if (ipv6_addr_any(mcastgrp
))
1056 list_for_each_entry(c
, &mrt
->mfc6_cache_array
[line
], list
)
1057 if (ipv6_addr_any(&c
->mf6c_origin
) &&
1058 ipv6_addr_equal(&c
->mf6c_mcastgrp
, mcastgrp
)) {
1059 if (c
->mfc_un
.res
.ttls
[mifi
] < 255)
1062 /* It's ok if the mifi is part of the static tree */
1063 proxy
= ip6mr_cache_find_any_parent(mrt
,
1065 if (proxy
&& proxy
->mfc_un
.res
.ttls
[mifi
] < 255)
1070 return ip6mr_cache_find_any_parent(mrt
, mifi
);
1074 * Allocate a multicast cache entry
1076 static struct mfc6_cache
*ip6mr_cache_alloc(void)
1078 struct mfc6_cache
*c
= kmem_cache_zalloc(mrt_cachep
, GFP_KERNEL
);
1081 c
->mfc_un
.res
.last_assert
= jiffies
- MFC_ASSERT_THRESH
- 1;
1082 c
->mfc_un
.res
.minvif
= MAXMIFS
;
1086 static struct mfc6_cache
*ip6mr_cache_alloc_unres(void)
1088 struct mfc6_cache
*c
= kmem_cache_zalloc(mrt_cachep
, GFP_ATOMIC
);
1091 skb_queue_head_init(&c
->mfc_un
.unres
.unresolved
);
1092 c
->mfc_un
.unres
.expires
= jiffies
+ 10 * HZ
;
1097 * A cache entry has gone into a resolved state from queued
1100 static void ip6mr_cache_resolve(struct net
*net
, struct mr6_table
*mrt
,
1101 struct mfc6_cache
*uc
, struct mfc6_cache
*c
)
1103 struct sk_buff
*skb
;
1106 * Play the pending entries through our router
1109 while ((skb
= __skb_dequeue(&uc
->mfc_un
.unres
.unresolved
))) {
1110 if (ipv6_hdr(skb
)->version
== 0) {
1111 struct nlmsghdr
*nlh
= skb_pull(skb
,
1112 sizeof(struct ipv6hdr
));
1114 if (__ip6mr_fill_mroute(mrt
, skb
, c
, nlmsg_data(nlh
)) > 0) {
1115 nlh
->nlmsg_len
= skb_tail_pointer(skb
) - (u8
*)nlh
;
1117 nlh
->nlmsg_type
= NLMSG_ERROR
;
1118 nlh
->nlmsg_len
= nlmsg_msg_size(sizeof(struct nlmsgerr
));
1119 skb_trim(skb
, nlh
->nlmsg_len
);
1120 ((struct nlmsgerr
*)nlmsg_data(nlh
))->error
= -EMSGSIZE
;
1122 rtnl_unicast(skb
, net
, NETLINK_CB(skb
).portid
);
1124 ip6_mr_forward(net
, mrt
, skb
, c
);
1129 * Bounce a cache query up to pim6sd and netlink.
1131 * Called under mrt_lock.
1134 static int ip6mr_cache_report(struct mr6_table
*mrt
, struct sk_buff
*pkt
,
1135 mifi_t mifi
, int assert)
1137 struct sk_buff
*skb
;
1138 struct mrt6msg
*msg
;
1141 #ifdef CONFIG_IPV6_PIMSM_V2
1142 if (assert == MRT6MSG_WHOLEPKT
)
1143 skb
= skb_realloc_headroom(pkt
, -skb_network_offset(pkt
)
1147 skb
= alloc_skb(sizeof(struct ipv6hdr
) + sizeof(*msg
), GFP_ATOMIC
);
1152 /* I suppose that internal messages
1153 * do not require checksums */
1155 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1157 #ifdef CONFIG_IPV6_PIMSM_V2
1158 if (assert == MRT6MSG_WHOLEPKT
) {
1159 /* Ugly, but we have no choice with this interface.
1160 Duplicate old header, fix length etc.
1161 And all this only to mangle msg->im6_msgtype and
1162 to set msg->im6_mbz to "mbz" :-)
1164 skb_push(skb
, -skb_network_offset(pkt
));
1166 skb_push(skb
, sizeof(*msg
));
1167 skb_reset_transport_header(skb
);
1168 msg
= (struct mrt6msg
*)skb_transport_header(skb
);
1170 msg
->im6_msgtype
= MRT6MSG_WHOLEPKT
;
1171 msg
->im6_mif
= mrt
->mroute_reg_vif_num
;
1173 msg
->im6_src
= ipv6_hdr(pkt
)->saddr
;
1174 msg
->im6_dst
= ipv6_hdr(pkt
)->daddr
;
1176 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1181 * Copy the IP header
1184 skb_put(skb
, sizeof(struct ipv6hdr
));
1185 skb_reset_network_header(skb
);
1186 skb_copy_to_linear_data(skb
, ipv6_hdr(pkt
), sizeof(struct ipv6hdr
));
1191 skb_put(skb
, sizeof(*msg
));
1192 skb_reset_transport_header(skb
);
1193 msg
= (struct mrt6msg
*)skb_transport_header(skb
);
1196 msg
->im6_msgtype
= assert;
1197 msg
->im6_mif
= mifi
;
1199 msg
->im6_src
= ipv6_hdr(pkt
)->saddr
;
1200 msg
->im6_dst
= ipv6_hdr(pkt
)->daddr
;
1202 skb_dst_set(skb
, dst_clone(skb_dst(pkt
)));
1203 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1206 if (!mrt
->mroute6_sk
) {
1211 mrt6msg_netlink_event(mrt
, skb
);
1214 * Deliver to user space multicast routing algorithms
1216 ret
= sock_queue_rcv_skb(mrt
->mroute6_sk
, skb
);
1218 net_warn_ratelimited("mroute6: pending queue full, dropping entries\n");
1226 * Queue a packet for resolution. It gets locked cache entry!
1230 ip6mr_cache_unresolved(struct mr6_table
*mrt
, mifi_t mifi
, struct sk_buff
*skb
)
1234 struct mfc6_cache
*c
;
1236 spin_lock_bh(&mfc_unres_lock
);
1237 list_for_each_entry(c
, &mrt
->mfc6_unres_queue
, list
) {
1238 if (ipv6_addr_equal(&c
->mf6c_mcastgrp
, &ipv6_hdr(skb
)->daddr
) &&
1239 ipv6_addr_equal(&c
->mf6c_origin
, &ipv6_hdr(skb
)->saddr
)) {
1247 * Create a new entry if allowable
1250 if (atomic_read(&mrt
->cache_resolve_queue_len
) >= 10 ||
1251 (c
= ip6mr_cache_alloc_unres()) == NULL
) {
1252 spin_unlock_bh(&mfc_unres_lock
);
1259 * Fill in the new cache entry
1261 c
->mf6c_parent
= -1;
1262 c
->mf6c_origin
= ipv6_hdr(skb
)->saddr
;
1263 c
->mf6c_mcastgrp
= ipv6_hdr(skb
)->daddr
;
1266 * Reflect first query at pim6sd
1268 err
= ip6mr_cache_report(mrt
, skb
, mifi
, MRT6MSG_NOCACHE
);
1270 /* If the report failed throw the cache entry
1273 spin_unlock_bh(&mfc_unres_lock
);
1275 ip6mr_cache_free(c
);
1280 atomic_inc(&mrt
->cache_resolve_queue_len
);
1281 list_add(&c
->list
, &mrt
->mfc6_unres_queue
);
1282 mr6_netlink_event(mrt
, c
, RTM_NEWROUTE
);
1284 ipmr_do_expire_process(mrt
);
1288 * See if we can append the packet
1290 if (c
->mfc_un
.unres
.unresolved
.qlen
> 3) {
1294 skb_queue_tail(&c
->mfc_un
.unres
.unresolved
, skb
);
1298 spin_unlock_bh(&mfc_unres_lock
);
1303 * MFC6 cache manipulation by user space
1306 static int ip6mr_mfc_delete(struct mr6_table
*mrt
, struct mf6cctl
*mfc
,
1310 struct mfc6_cache
*c
, *next
;
1312 line
= MFC6_HASH(&mfc
->mf6cc_mcastgrp
.sin6_addr
, &mfc
->mf6cc_origin
.sin6_addr
);
1314 list_for_each_entry_safe(c
, next
, &mrt
->mfc6_cache_array
[line
], list
) {
1315 if (ipv6_addr_equal(&c
->mf6c_origin
, &mfc
->mf6cc_origin
.sin6_addr
) &&
1316 ipv6_addr_equal(&c
->mf6c_mcastgrp
,
1317 &mfc
->mf6cc_mcastgrp
.sin6_addr
) &&
1318 (parent
== -1 || parent
== c
->mf6c_parent
)) {
1319 write_lock_bh(&mrt_lock
);
1321 write_unlock_bh(&mrt_lock
);
1323 mr6_netlink_event(mrt
, c
, RTM_DELROUTE
);
1324 ip6mr_cache_free(c
);
1331 static int ip6mr_device_event(struct notifier_block
*this,
1332 unsigned long event
, void *ptr
)
1334 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
1335 struct net
*net
= dev_net(dev
);
1336 struct mr6_table
*mrt
;
1337 struct mif_device
*v
;
1340 if (event
!= NETDEV_UNREGISTER
)
1343 ip6mr_for_each_table(mrt
, net
) {
1344 v
= &mrt
->vif6_table
[0];
1345 for (ct
= 0; ct
< mrt
->maxvif
; ct
++, v
++) {
1347 mif6_delete(mrt
, ct
, 1, NULL
);
1354 static struct notifier_block ip6_mr_notifier
= {
1355 .notifier_call
= ip6mr_device_event
1359 * Setup for IP multicast routing
1362 static int __net_init
ip6mr_net_init(struct net
*net
)
1366 err
= ip6mr_rules_init(net
);
1370 #ifdef CONFIG_PROC_FS
1372 if (!proc_create("ip6_mr_vif", 0, net
->proc_net
, &ip6mr_vif_fops
))
1374 if (!proc_create("ip6_mr_cache", 0, net
->proc_net
, &ip6mr_mfc_fops
))
1375 goto proc_cache_fail
;
1380 #ifdef CONFIG_PROC_FS
1382 remove_proc_entry("ip6_mr_vif", net
->proc_net
);
1384 ip6mr_rules_exit(net
);
1390 static void __net_exit
ip6mr_net_exit(struct net
*net
)
1392 #ifdef CONFIG_PROC_FS
1393 remove_proc_entry("ip6_mr_cache", net
->proc_net
);
1394 remove_proc_entry("ip6_mr_vif", net
->proc_net
);
1396 ip6mr_rules_exit(net
);
1399 static struct pernet_operations ip6mr_net_ops
= {
1400 .init
= ip6mr_net_init
,
1401 .exit
= ip6mr_net_exit
,
1404 int __init
ip6_mr_init(void)
1408 mrt_cachep
= kmem_cache_create("ip6_mrt_cache",
1409 sizeof(struct mfc6_cache
),
1410 0, SLAB_HWCACHE_ALIGN
,
1415 err
= register_pernet_subsys(&ip6mr_net_ops
);
1417 goto reg_pernet_fail
;
1419 err
= register_netdevice_notifier(&ip6_mr_notifier
);
1421 goto reg_notif_fail
;
1422 #ifdef CONFIG_IPV6_PIMSM_V2
1423 if (inet6_add_protocol(&pim6_protocol
, IPPROTO_PIM
) < 0) {
1424 pr_err("%s: can't add PIM protocol\n", __func__
);
1426 goto add_proto_fail
;
1429 rtnl_register(RTNL_FAMILY_IP6MR
, RTM_GETROUTE
, NULL
,
1430 ip6mr_rtm_dumproute
, 0);
1432 #ifdef CONFIG_IPV6_PIMSM_V2
1434 unregister_netdevice_notifier(&ip6_mr_notifier
);
1437 unregister_pernet_subsys(&ip6mr_net_ops
);
1439 kmem_cache_destroy(mrt_cachep
);
1443 void ip6_mr_cleanup(void)
1445 rtnl_unregister(RTNL_FAMILY_IP6MR
, RTM_GETROUTE
);
1446 #ifdef CONFIG_IPV6_PIMSM_V2
1447 inet6_del_protocol(&pim6_protocol
, IPPROTO_PIM
);
1449 unregister_netdevice_notifier(&ip6_mr_notifier
);
1450 unregister_pernet_subsys(&ip6mr_net_ops
);
1451 kmem_cache_destroy(mrt_cachep
);
1454 static int ip6mr_mfc_add(struct net
*net
, struct mr6_table
*mrt
,
1455 struct mf6cctl
*mfc
, int mrtsock
, int parent
)
1459 struct mfc6_cache
*uc
, *c
;
1460 unsigned char ttls
[MAXMIFS
];
1463 if (mfc
->mf6cc_parent
>= MAXMIFS
)
1466 memset(ttls
, 255, MAXMIFS
);
1467 for (i
= 0; i
< MAXMIFS
; i
++) {
1468 if (IF_ISSET(i
, &mfc
->mf6cc_ifset
))
1473 line
= MFC6_HASH(&mfc
->mf6cc_mcastgrp
.sin6_addr
, &mfc
->mf6cc_origin
.sin6_addr
);
1475 list_for_each_entry(c
, &mrt
->mfc6_cache_array
[line
], list
) {
1476 if (ipv6_addr_equal(&c
->mf6c_origin
, &mfc
->mf6cc_origin
.sin6_addr
) &&
1477 ipv6_addr_equal(&c
->mf6c_mcastgrp
,
1478 &mfc
->mf6cc_mcastgrp
.sin6_addr
) &&
1479 (parent
== -1 || parent
== mfc
->mf6cc_parent
)) {
1486 write_lock_bh(&mrt_lock
);
1487 c
->mf6c_parent
= mfc
->mf6cc_parent
;
1488 ip6mr_update_thresholds(mrt
, c
, ttls
);
1490 c
->mfc_flags
|= MFC_STATIC
;
1491 write_unlock_bh(&mrt_lock
);
1492 mr6_netlink_event(mrt
, c
, RTM_NEWROUTE
);
1496 if (!ipv6_addr_any(&mfc
->mf6cc_mcastgrp
.sin6_addr
) &&
1497 !ipv6_addr_is_multicast(&mfc
->mf6cc_mcastgrp
.sin6_addr
))
1500 c
= ip6mr_cache_alloc();
1504 c
->mf6c_origin
= mfc
->mf6cc_origin
.sin6_addr
;
1505 c
->mf6c_mcastgrp
= mfc
->mf6cc_mcastgrp
.sin6_addr
;
1506 c
->mf6c_parent
= mfc
->mf6cc_parent
;
1507 ip6mr_update_thresholds(mrt
, c
, ttls
);
1509 c
->mfc_flags
|= MFC_STATIC
;
1511 write_lock_bh(&mrt_lock
);
1512 list_add(&c
->list
, &mrt
->mfc6_cache_array
[line
]);
1513 write_unlock_bh(&mrt_lock
);
1516 * Check to see if we resolved a queued list. If so we
1517 * need to send on the frames and tidy up.
1520 spin_lock_bh(&mfc_unres_lock
);
1521 list_for_each_entry(uc
, &mrt
->mfc6_unres_queue
, list
) {
1522 if (ipv6_addr_equal(&uc
->mf6c_origin
, &c
->mf6c_origin
) &&
1523 ipv6_addr_equal(&uc
->mf6c_mcastgrp
, &c
->mf6c_mcastgrp
)) {
1524 list_del(&uc
->list
);
1525 atomic_dec(&mrt
->cache_resolve_queue_len
);
1530 if (list_empty(&mrt
->mfc6_unres_queue
))
1531 del_timer(&mrt
->ipmr_expire_timer
);
1532 spin_unlock_bh(&mfc_unres_lock
);
1535 ip6mr_cache_resolve(net
, mrt
, uc
, c
);
1536 ip6mr_cache_free(uc
);
1538 mr6_netlink_event(mrt
, c
, RTM_NEWROUTE
);
1543 * Close the multicast socket, and clear the vif tables etc
1546 static void mroute_clean_tables(struct mr6_table
*mrt
, bool all
)
1550 struct mfc6_cache
*c
, *next
;
1553 * Shut down all active vif entries
1555 for (i
= 0; i
< mrt
->maxvif
; i
++) {
1556 if (!all
&& (mrt
->vif6_table
[i
].flags
& VIFF_STATIC
))
1558 mif6_delete(mrt
, i
, 0, &list
);
1560 unregister_netdevice_many(&list
);
1565 for (i
= 0; i
< MFC6_LINES
; i
++) {
1566 list_for_each_entry_safe(c
, next
, &mrt
->mfc6_cache_array
[i
], list
) {
1567 if (!all
&& (c
->mfc_flags
& MFC_STATIC
))
1569 write_lock_bh(&mrt_lock
);
1571 write_unlock_bh(&mrt_lock
);
1573 mr6_netlink_event(mrt
, c
, RTM_DELROUTE
);
1574 ip6mr_cache_free(c
);
1578 if (atomic_read(&mrt
->cache_resolve_queue_len
) != 0) {
1579 spin_lock_bh(&mfc_unres_lock
);
1580 list_for_each_entry_safe(c
, next
, &mrt
->mfc6_unres_queue
, list
) {
1582 mr6_netlink_event(mrt
, c
, RTM_DELROUTE
);
1583 ip6mr_destroy_unres(mrt
, c
);
1585 spin_unlock_bh(&mfc_unres_lock
);
1589 static int ip6mr_sk_init(struct mr6_table
*mrt
, struct sock
*sk
)
1592 struct net
*net
= sock_net(sk
);
1595 write_lock_bh(&mrt_lock
);
1596 if (likely(mrt
->mroute6_sk
== NULL
)) {
1597 mrt
->mroute6_sk
= sk
;
1598 net
->ipv6
.devconf_all
->mc_forwarding
++;
1602 write_unlock_bh(&mrt_lock
);
1605 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
1606 NETCONFA_MC_FORWARDING
,
1607 NETCONFA_IFINDEX_ALL
,
1608 net
->ipv6
.devconf_all
);
1614 int ip6mr_sk_done(struct sock
*sk
)
1617 struct net
*net
= sock_net(sk
);
1618 struct mr6_table
*mrt
;
1620 if (sk
->sk_type
!= SOCK_RAW
||
1621 inet_sk(sk
)->inet_num
!= IPPROTO_ICMPV6
)
1625 ip6mr_for_each_table(mrt
, net
) {
1626 if (sk
== mrt
->mroute6_sk
) {
1627 write_lock_bh(&mrt_lock
);
1628 mrt
->mroute6_sk
= NULL
;
1629 net
->ipv6
.devconf_all
->mc_forwarding
--;
1630 write_unlock_bh(&mrt_lock
);
1631 inet6_netconf_notify_devconf(net
, RTM_NEWNETCONF
,
1632 NETCONFA_MC_FORWARDING
,
1633 NETCONFA_IFINDEX_ALL
,
1634 net
->ipv6
.devconf_all
);
1636 mroute_clean_tables(mrt
, false);
1646 struct sock
*mroute6_socket(struct net
*net
, struct sk_buff
*skb
)
1648 struct mr6_table
*mrt
;
1649 struct flowi6 fl6
= {
1650 .flowi6_iif
= skb
->skb_iif
? : LOOPBACK_IFINDEX
,
1651 .flowi6_oif
= skb
->dev
->ifindex
,
1652 .flowi6_mark
= skb
->mark
,
1655 if (ip6mr_fib_lookup(net
, &fl6
, &mrt
) < 0)
1658 return mrt
->mroute6_sk
;
1662 * Socket options and virtual interface manipulation. The whole
1663 * virtual interface system is a complete heap, but unfortunately
1664 * that's how BSD mrouted happens to think. Maybe one day with a proper
1665 * MOSPF/PIM router set up we can clean this up.
1668 int ip6_mroute_setsockopt(struct sock
*sk
, int optname
, char __user
*optval
, unsigned int optlen
)
1670 int ret
, parent
= 0;
1674 struct net
*net
= sock_net(sk
);
1675 struct mr6_table
*mrt
;
1677 if (sk
->sk_type
!= SOCK_RAW
||
1678 inet_sk(sk
)->inet_num
!= IPPROTO_ICMPV6
)
1681 mrt
= ip6mr_get_table(net
, raw6_sk(sk
)->ip6mr_table
? : RT6_TABLE_DFLT
);
1685 if (optname
!= MRT6_INIT
) {
1686 if (sk
!= mrt
->mroute6_sk
&& !ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
1692 if (optlen
< sizeof(int))
1695 return ip6mr_sk_init(mrt
, sk
);
1698 return ip6mr_sk_done(sk
);
1701 if (optlen
< sizeof(vif
))
1703 if (copy_from_user(&vif
, optval
, sizeof(vif
)))
1705 if (vif
.mif6c_mifi
>= MAXMIFS
)
1708 ret
= mif6_add(net
, mrt
, &vif
, sk
== mrt
->mroute6_sk
);
1713 if (optlen
< sizeof(mifi_t
))
1715 if (copy_from_user(&mifi
, optval
, sizeof(mifi_t
)))
1718 ret
= mif6_delete(mrt
, mifi
, 0, NULL
);
1723 * Manipulate the forwarding caches. These live
1724 * in a sort of kernel/user symbiosis.
1730 case MRT6_ADD_MFC_PROXY
:
1731 case MRT6_DEL_MFC_PROXY
:
1732 if (optlen
< sizeof(mfc
))
1734 if (copy_from_user(&mfc
, optval
, sizeof(mfc
)))
1737 parent
= mfc
.mf6cc_parent
;
1739 if (optname
== MRT6_DEL_MFC
|| optname
== MRT6_DEL_MFC_PROXY
)
1740 ret
= ip6mr_mfc_delete(mrt
, &mfc
, parent
);
1742 ret
= ip6mr_mfc_add(net
, mrt
, &mfc
,
1743 sk
== mrt
->mroute6_sk
, parent
);
1748 * Control PIM assert (to activate pim will activate assert)
1754 if (optlen
!= sizeof(v
))
1756 if (get_user(v
, (int __user
*)optval
))
1758 mrt
->mroute_do_assert
= v
;
1762 #ifdef CONFIG_IPV6_PIMSM_V2
1767 if (optlen
!= sizeof(v
))
1769 if (get_user(v
, (int __user
*)optval
))
1774 if (v
!= mrt
->mroute_do_pim
) {
1775 mrt
->mroute_do_pim
= v
;
1776 mrt
->mroute_do_assert
= v
;
1783 #ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES
1788 if (optlen
!= sizeof(u32
))
1790 if (get_user(v
, (u32 __user
*)optval
))
1792 /* "pim6reg%u" should not exceed 16 bytes (IFNAMSIZ) */
1793 if (v
!= RT_TABLE_DEFAULT
&& v
>= 100000000)
1795 if (sk
== mrt
->mroute6_sk
)
1800 if (!ip6mr_new_table(net
, v
))
1803 raw6_sk(sk
)->ip6mr_table
= v
;
1809 * Spurious command, or MRT6_VERSION which you cannot
1813 return -ENOPROTOOPT
;
1818 * Getsock opt support for the multicast routing system.
1821 int ip6_mroute_getsockopt(struct sock
*sk
, int optname
, char __user
*optval
,
1826 struct net
*net
= sock_net(sk
);
1827 struct mr6_table
*mrt
;
1829 if (sk
->sk_type
!= SOCK_RAW
||
1830 inet_sk(sk
)->inet_num
!= IPPROTO_ICMPV6
)
1833 mrt
= ip6mr_get_table(net
, raw6_sk(sk
)->ip6mr_table
? : RT6_TABLE_DFLT
);
1841 #ifdef CONFIG_IPV6_PIMSM_V2
1843 val
= mrt
->mroute_do_pim
;
1847 val
= mrt
->mroute_do_assert
;
1850 return -ENOPROTOOPT
;
1853 if (get_user(olr
, optlen
))
1856 olr
= min_t(int, olr
, sizeof(int));
1860 if (put_user(olr
, optlen
))
1862 if (copy_to_user(optval
, &val
, olr
))
1868 * The IP multicast ioctl support routines.
1871 int ip6mr_ioctl(struct sock
*sk
, int cmd
, void __user
*arg
)
1873 struct sioc_sg_req6 sr
;
1874 struct sioc_mif_req6 vr
;
1875 struct mif_device
*vif
;
1876 struct mfc6_cache
*c
;
1877 struct net
*net
= sock_net(sk
);
1878 struct mr6_table
*mrt
;
1880 mrt
= ip6mr_get_table(net
, raw6_sk(sk
)->ip6mr_table
? : RT6_TABLE_DFLT
);
1885 case SIOCGETMIFCNT_IN6
:
1886 if (copy_from_user(&vr
, arg
, sizeof(vr
)))
1888 if (vr
.mifi
>= mrt
->maxvif
)
1890 read_lock(&mrt_lock
);
1891 vif
= &mrt
->vif6_table
[vr
.mifi
];
1892 if (MIF_EXISTS(mrt
, vr
.mifi
)) {
1893 vr
.icount
= vif
->pkt_in
;
1894 vr
.ocount
= vif
->pkt_out
;
1895 vr
.ibytes
= vif
->bytes_in
;
1896 vr
.obytes
= vif
->bytes_out
;
1897 read_unlock(&mrt_lock
);
1899 if (copy_to_user(arg
, &vr
, sizeof(vr
)))
1903 read_unlock(&mrt_lock
);
1904 return -EADDRNOTAVAIL
;
1905 case SIOCGETSGCNT_IN6
:
1906 if (copy_from_user(&sr
, arg
, sizeof(sr
)))
1909 read_lock(&mrt_lock
);
1910 c
= ip6mr_cache_find(mrt
, &sr
.src
.sin6_addr
, &sr
.grp
.sin6_addr
);
1912 sr
.pktcnt
= c
->mfc_un
.res
.pkt
;
1913 sr
.bytecnt
= c
->mfc_un
.res
.bytes
;
1914 sr
.wrong_if
= c
->mfc_un
.res
.wrong_if
;
1915 read_unlock(&mrt_lock
);
1917 if (copy_to_user(arg
, &sr
, sizeof(sr
)))
1921 read_unlock(&mrt_lock
);
1922 return -EADDRNOTAVAIL
;
1924 return -ENOIOCTLCMD
;
1928 #ifdef CONFIG_COMPAT
1929 struct compat_sioc_sg_req6
{
1930 struct sockaddr_in6 src
;
1931 struct sockaddr_in6 grp
;
1932 compat_ulong_t pktcnt
;
1933 compat_ulong_t bytecnt
;
1934 compat_ulong_t wrong_if
;
1937 struct compat_sioc_mif_req6
{
1939 compat_ulong_t icount
;
1940 compat_ulong_t ocount
;
1941 compat_ulong_t ibytes
;
1942 compat_ulong_t obytes
;
1945 int ip6mr_compat_ioctl(struct sock
*sk
, unsigned int cmd
, void __user
*arg
)
1947 struct compat_sioc_sg_req6 sr
;
1948 struct compat_sioc_mif_req6 vr
;
1949 struct mif_device
*vif
;
1950 struct mfc6_cache
*c
;
1951 struct net
*net
= sock_net(sk
);
1952 struct mr6_table
*mrt
;
1954 mrt
= ip6mr_get_table(net
, raw6_sk(sk
)->ip6mr_table
? : RT6_TABLE_DFLT
);
1959 case SIOCGETMIFCNT_IN6
:
1960 if (copy_from_user(&vr
, arg
, sizeof(vr
)))
1962 if (vr
.mifi
>= mrt
->maxvif
)
1964 read_lock(&mrt_lock
);
1965 vif
= &mrt
->vif6_table
[vr
.mifi
];
1966 if (MIF_EXISTS(mrt
, vr
.mifi
)) {
1967 vr
.icount
= vif
->pkt_in
;
1968 vr
.ocount
= vif
->pkt_out
;
1969 vr
.ibytes
= vif
->bytes_in
;
1970 vr
.obytes
= vif
->bytes_out
;
1971 read_unlock(&mrt_lock
);
1973 if (copy_to_user(arg
, &vr
, sizeof(vr
)))
1977 read_unlock(&mrt_lock
);
1978 return -EADDRNOTAVAIL
;
1979 case SIOCGETSGCNT_IN6
:
1980 if (copy_from_user(&sr
, arg
, sizeof(sr
)))
1983 read_lock(&mrt_lock
);
1984 c
= ip6mr_cache_find(mrt
, &sr
.src
.sin6_addr
, &sr
.grp
.sin6_addr
);
1986 sr
.pktcnt
= c
->mfc_un
.res
.pkt
;
1987 sr
.bytecnt
= c
->mfc_un
.res
.bytes
;
1988 sr
.wrong_if
= c
->mfc_un
.res
.wrong_if
;
1989 read_unlock(&mrt_lock
);
1991 if (copy_to_user(arg
, &sr
, sizeof(sr
)))
1995 read_unlock(&mrt_lock
);
1996 return -EADDRNOTAVAIL
;
1998 return -ENOIOCTLCMD
;
2003 static inline int ip6mr_forward2_finish(struct net
*net
, struct sock
*sk
, struct sk_buff
*skb
)
2005 __IP6_INC_STATS(net
, ip6_dst_idev(skb_dst(skb
)),
2006 IPSTATS_MIB_OUTFORWDATAGRAMS
);
2007 __IP6_ADD_STATS(net
, ip6_dst_idev(skb_dst(skb
)),
2008 IPSTATS_MIB_OUTOCTETS
, skb
->len
);
2009 return dst_output(net
, sk
, skb
);
2013 * Processing handlers for ip6mr_forward
2016 static int ip6mr_forward2(struct net
*net
, struct mr6_table
*mrt
,
2017 struct sk_buff
*skb
, struct mfc6_cache
*c
, int vifi
)
2019 struct ipv6hdr
*ipv6h
;
2020 struct mif_device
*vif
= &mrt
->vif6_table
[vifi
];
2021 struct net_device
*dev
;
2022 struct dst_entry
*dst
;
2028 #ifdef CONFIG_IPV6_PIMSM_V2
2029 if (vif
->flags
& MIFF_REGISTER
) {
2031 vif
->bytes_out
+= skb
->len
;
2032 vif
->dev
->stats
.tx_bytes
+= skb
->len
;
2033 vif
->dev
->stats
.tx_packets
++;
2034 ip6mr_cache_report(mrt
, skb
, vifi
, MRT6MSG_WHOLEPKT
);
2039 ipv6h
= ipv6_hdr(skb
);
2041 fl6
= (struct flowi6
) {
2042 .flowi6_oif
= vif
->link
,
2043 .daddr
= ipv6h
->daddr
,
2046 dst
= ip6_route_output(net
, NULL
, &fl6
);
2053 skb_dst_set(skb
, dst
);
2056 * RFC1584 teaches, that DVMRP/PIM router must deliver packets locally
2057 * not only before forwarding, but after forwarding on all output
2058 * interfaces. It is clear, if mrouter runs a multicasting
2059 * program, it should receive packets not depending to what interface
2060 * program is joined.
2061 * If we will not make it, the program will have to join on all
2062 * interfaces. On the other hand, multihoming host (or router, but
2063 * not mrouter) cannot join to more than one interface - it will
2064 * result in receiving multiple packets.
2069 vif
->bytes_out
+= skb
->len
;
2071 /* We are about to write */
2072 /* XXX: extension headers? */
2073 if (skb_cow(skb
, sizeof(*ipv6h
) + LL_RESERVED_SPACE(dev
)))
2076 ipv6h
= ipv6_hdr(skb
);
2079 IP6CB(skb
)->flags
|= IP6SKB_FORWARDED
;
2081 return NF_HOOK(NFPROTO_IPV6
, NF_INET_FORWARD
,
2082 net
, NULL
, skb
, skb
->dev
, dev
,
2083 ip6mr_forward2_finish
);
2090 static int ip6mr_find_vif(struct mr6_table
*mrt
, struct net_device
*dev
)
2094 for (ct
= mrt
->maxvif
- 1; ct
>= 0; ct
--) {
2095 if (mrt
->vif6_table
[ct
].dev
== dev
)
2101 static void ip6_mr_forward(struct net
*net
, struct mr6_table
*mrt
,
2102 struct sk_buff
*skb
, struct mfc6_cache
*cache
)
2106 int true_vifi
= ip6mr_find_vif(mrt
, skb
->dev
);
2108 vif
= cache
->mf6c_parent
;
2109 cache
->mfc_un
.res
.pkt
++;
2110 cache
->mfc_un
.res
.bytes
+= skb
->len
;
2111 cache
->mfc_un
.res
.lastuse
= jiffies
;
2113 if (ipv6_addr_any(&cache
->mf6c_origin
) && true_vifi
>= 0) {
2114 struct mfc6_cache
*cache_proxy
;
2116 /* For an (*,G) entry, we only check that the incoming
2117 * interface is part of the static tree.
2119 cache_proxy
= ip6mr_cache_find_any_parent(mrt
, vif
);
2121 cache_proxy
->mfc_un
.res
.ttls
[true_vifi
] < 255)
2126 * Wrong interface: drop packet and (maybe) send PIM assert.
2128 if (mrt
->vif6_table
[vif
].dev
!= skb
->dev
) {
2129 cache
->mfc_un
.res
.wrong_if
++;
2131 if (true_vifi
>= 0 && mrt
->mroute_do_assert
&&
2132 /* pimsm uses asserts, when switching from RPT to SPT,
2133 so that we cannot check that packet arrived on an oif.
2134 It is bad, but otherwise we would need to move pretty
2135 large chunk of pimd to kernel. Ough... --ANK
2137 (mrt
->mroute_do_pim
||
2138 cache
->mfc_un
.res
.ttls
[true_vifi
] < 255) &&
2140 cache
->mfc_un
.res
.last_assert
+ MFC_ASSERT_THRESH
)) {
2141 cache
->mfc_un
.res
.last_assert
= jiffies
;
2142 ip6mr_cache_report(mrt
, skb
, true_vifi
, MRT6MSG_WRONGMIF
);
2148 mrt
->vif6_table
[vif
].pkt_in
++;
2149 mrt
->vif6_table
[vif
].bytes_in
+= skb
->len
;
2154 if (ipv6_addr_any(&cache
->mf6c_origin
) &&
2155 ipv6_addr_any(&cache
->mf6c_mcastgrp
)) {
2156 if (true_vifi
>= 0 &&
2157 true_vifi
!= cache
->mf6c_parent
&&
2158 ipv6_hdr(skb
)->hop_limit
>
2159 cache
->mfc_un
.res
.ttls
[cache
->mf6c_parent
]) {
2160 /* It's an (*,*) entry and the packet is not coming from
2161 * the upstream: forward the packet to the upstream
2164 psend
= cache
->mf6c_parent
;
2169 for (ct
= cache
->mfc_un
.res
.maxvif
- 1; ct
>= cache
->mfc_un
.res
.minvif
; ct
--) {
2170 /* For (*,G) entry, don't forward to the incoming interface */
2171 if ((!ipv6_addr_any(&cache
->mf6c_origin
) || ct
!= true_vifi
) &&
2172 ipv6_hdr(skb
)->hop_limit
> cache
->mfc_un
.res
.ttls
[ct
]) {
2174 struct sk_buff
*skb2
= skb_clone(skb
, GFP_ATOMIC
);
2176 ip6mr_forward2(net
, mrt
, skb2
, cache
, psend
);
2183 ip6mr_forward2(net
, mrt
, skb
, cache
, psend
);
2193 * Multicast packets for forwarding arrive here
2196 int ip6_mr_input(struct sk_buff
*skb
)
2198 struct mfc6_cache
*cache
;
2199 struct net
*net
= dev_net(skb
->dev
);
2200 struct mr6_table
*mrt
;
2201 struct flowi6 fl6
= {
2202 .flowi6_iif
= skb
->dev
->ifindex
,
2203 .flowi6_mark
= skb
->mark
,
2207 err
= ip6mr_fib_lookup(net
, &fl6
, &mrt
);
2213 read_lock(&mrt_lock
);
2214 cache
= ip6mr_cache_find(mrt
,
2215 &ipv6_hdr(skb
)->saddr
, &ipv6_hdr(skb
)->daddr
);
2217 int vif
= ip6mr_find_vif(mrt
, skb
->dev
);
2220 cache
= ip6mr_cache_find_any(mrt
,
2221 &ipv6_hdr(skb
)->daddr
,
2226 * No usable cache entry
2231 vif
= ip6mr_find_vif(mrt
, skb
->dev
);
2233 int err
= ip6mr_cache_unresolved(mrt
, vif
, skb
);
2234 read_unlock(&mrt_lock
);
2238 read_unlock(&mrt_lock
);
2243 ip6_mr_forward(net
, mrt
, skb
, cache
);
2245 read_unlock(&mrt_lock
);
2251 static int __ip6mr_fill_mroute(struct mr6_table
*mrt
, struct sk_buff
*skb
,
2252 struct mfc6_cache
*c
, struct rtmsg
*rtm
)
2254 struct rta_mfc_stats mfcs
;
2255 struct nlattr
*mp_attr
;
2256 struct rtnexthop
*nhp
;
2257 unsigned long lastuse
;
2260 /* If cache is unresolved, don't try to parse IIF and OIF */
2261 if (c
->mf6c_parent
>= MAXMIFS
) {
2262 rtm
->rtm_flags
|= RTNH_F_UNRESOLVED
;
2266 if (MIF_EXISTS(mrt
, c
->mf6c_parent
) &&
2267 nla_put_u32(skb
, RTA_IIF
, mrt
->vif6_table
[c
->mf6c_parent
].dev
->ifindex
) < 0)
2269 mp_attr
= nla_nest_start(skb
, RTA_MULTIPATH
);
2273 for (ct
= c
->mfc_un
.res
.minvif
; ct
< c
->mfc_un
.res
.maxvif
; ct
++) {
2274 if (MIF_EXISTS(mrt
, ct
) && c
->mfc_un
.res
.ttls
[ct
] < 255) {
2275 nhp
= nla_reserve_nohdr(skb
, sizeof(*nhp
));
2277 nla_nest_cancel(skb
, mp_attr
);
2281 nhp
->rtnh_flags
= 0;
2282 nhp
->rtnh_hops
= c
->mfc_un
.res
.ttls
[ct
];
2283 nhp
->rtnh_ifindex
= mrt
->vif6_table
[ct
].dev
->ifindex
;
2284 nhp
->rtnh_len
= sizeof(*nhp
);
2288 nla_nest_end(skb
, mp_attr
);
2290 lastuse
= READ_ONCE(c
->mfc_un
.res
.lastuse
);
2291 lastuse
= time_after_eq(jiffies
, lastuse
) ? jiffies
- lastuse
: 0;
2293 mfcs
.mfcs_packets
= c
->mfc_un
.res
.pkt
;
2294 mfcs
.mfcs_bytes
= c
->mfc_un
.res
.bytes
;
2295 mfcs
.mfcs_wrong_if
= c
->mfc_un
.res
.wrong_if
;
2296 if (nla_put_64bit(skb
, RTA_MFC_STATS
, sizeof(mfcs
), &mfcs
, RTA_PAD
) ||
2297 nla_put_u64_64bit(skb
, RTA_EXPIRES
, jiffies_to_clock_t(lastuse
),
2301 rtm
->rtm_type
= RTN_MULTICAST
;
2305 int ip6mr_get_route(struct net
*net
, struct sk_buff
*skb
, struct rtmsg
*rtm
,
2309 struct mr6_table
*mrt
;
2310 struct mfc6_cache
*cache
;
2311 struct rt6_info
*rt
= (struct rt6_info
*)skb_dst(skb
);
2313 mrt
= ip6mr_get_table(net
, RT6_TABLE_DFLT
);
2317 read_lock(&mrt_lock
);
2318 cache
= ip6mr_cache_find(mrt
, &rt
->rt6i_src
.addr
, &rt
->rt6i_dst
.addr
);
2319 if (!cache
&& skb
->dev
) {
2320 int vif
= ip6mr_find_vif(mrt
, skb
->dev
);
2323 cache
= ip6mr_cache_find_any(mrt
, &rt
->rt6i_dst
.addr
,
2328 struct sk_buff
*skb2
;
2329 struct ipv6hdr
*iph
;
2330 struct net_device
*dev
;
2334 if (!dev
|| (vif
= ip6mr_find_vif(mrt
, dev
)) < 0) {
2335 read_unlock(&mrt_lock
);
2339 /* really correct? */
2340 skb2
= alloc_skb(sizeof(struct ipv6hdr
), GFP_ATOMIC
);
2342 read_unlock(&mrt_lock
);
2346 NETLINK_CB(skb2
).portid
= portid
;
2347 skb_reset_transport_header(skb2
);
2349 skb_put(skb2
, sizeof(struct ipv6hdr
));
2350 skb_reset_network_header(skb2
);
2352 iph
= ipv6_hdr(skb2
);
2355 iph
->flow_lbl
[0] = 0;
2356 iph
->flow_lbl
[1] = 0;
2357 iph
->flow_lbl
[2] = 0;
2358 iph
->payload_len
= 0;
2359 iph
->nexthdr
= IPPROTO_NONE
;
2361 iph
->saddr
= rt
->rt6i_src
.addr
;
2362 iph
->daddr
= rt
->rt6i_dst
.addr
;
2364 err
= ip6mr_cache_unresolved(mrt
, vif
, skb2
);
2365 read_unlock(&mrt_lock
);
2370 if (rtm
->rtm_flags
& RTM_F_NOTIFY
)
2371 cache
->mfc_flags
|= MFC_NOTIFY
;
2373 err
= __ip6mr_fill_mroute(mrt
, skb
, cache
, rtm
);
2374 read_unlock(&mrt_lock
);
2378 static int ip6mr_fill_mroute(struct mr6_table
*mrt
, struct sk_buff
*skb
,
2379 u32 portid
, u32 seq
, struct mfc6_cache
*c
, int cmd
,
2382 struct nlmsghdr
*nlh
;
2386 nlh
= nlmsg_put(skb
, portid
, seq
, cmd
, sizeof(*rtm
), flags
);
2390 rtm
= nlmsg_data(nlh
);
2391 rtm
->rtm_family
= RTNL_FAMILY_IP6MR
;
2392 rtm
->rtm_dst_len
= 128;
2393 rtm
->rtm_src_len
= 128;
2395 rtm
->rtm_table
= mrt
->id
;
2396 if (nla_put_u32(skb
, RTA_TABLE
, mrt
->id
))
2397 goto nla_put_failure
;
2398 rtm
->rtm_type
= RTN_MULTICAST
;
2399 rtm
->rtm_scope
= RT_SCOPE_UNIVERSE
;
2400 if (c
->mfc_flags
& MFC_STATIC
)
2401 rtm
->rtm_protocol
= RTPROT_STATIC
;
2403 rtm
->rtm_protocol
= RTPROT_MROUTED
;
2406 if (nla_put_in6_addr(skb
, RTA_SRC
, &c
->mf6c_origin
) ||
2407 nla_put_in6_addr(skb
, RTA_DST
, &c
->mf6c_mcastgrp
))
2408 goto nla_put_failure
;
2409 err
= __ip6mr_fill_mroute(mrt
, skb
, c
, rtm
);
2410 /* do not break the dump if cache is unresolved */
2411 if (err
< 0 && err
!= -ENOENT
)
2412 goto nla_put_failure
;
2414 nlmsg_end(skb
, nlh
);
2418 nlmsg_cancel(skb
, nlh
);
2422 static int mr6_msgsize(bool unresolved
, int maxvif
)
2425 NLMSG_ALIGN(sizeof(struct rtmsg
))
2426 + nla_total_size(4) /* RTA_TABLE */
2427 + nla_total_size(sizeof(struct in6_addr
)) /* RTA_SRC */
2428 + nla_total_size(sizeof(struct in6_addr
)) /* RTA_DST */
2433 + nla_total_size(4) /* RTA_IIF */
2434 + nla_total_size(0) /* RTA_MULTIPATH */
2435 + maxvif
* NLA_ALIGN(sizeof(struct rtnexthop
))
2437 + nla_total_size_64bit(sizeof(struct rta_mfc_stats
))
2443 static void mr6_netlink_event(struct mr6_table
*mrt
, struct mfc6_cache
*mfc
,
2446 struct net
*net
= read_pnet(&mrt
->net
);
2447 struct sk_buff
*skb
;
2450 skb
= nlmsg_new(mr6_msgsize(mfc
->mf6c_parent
>= MAXMIFS
, mrt
->maxvif
),
2455 err
= ip6mr_fill_mroute(mrt
, skb
, 0, 0, mfc
, cmd
, 0);
2459 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_MROUTE
, NULL
, GFP_ATOMIC
);
2465 rtnl_set_sk_err(net
, RTNLGRP_IPV6_MROUTE
, err
);
2468 static size_t mrt6msg_netlink_msgsize(size_t payloadlen
)
2471 NLMSG_ALIGN(sizeof(struct rtgenmsg
))
2472 + nla_total_size(1) /* IP6MRA_CREPORT_MSGTYPE */
2473 + nla_total_size(4) /* IP6MRA_CREPORT_MIF_ID */
2474 /* IP6MRA_CREPORT_SRC_ADDR */
2475 + nla_total_size(sizeof(struct in6_addr
))
2476 /* IP6MRA_CREPORT_DST_ADDR */
2477 + nla_total_size(sizeof(struct in6_addr
))
2478 /* IP6MRA_CREPORT_PKT */
2479 + nla_total_size(payloadlen
)
2485 static void mrt6msg_netlink_event(struct mr6_table
*mrt
, struct sk_buff
*pkt
)
2487 struct net
*net
= read_pnet(&mrt
->net
);
2488 struct nlmsghdr
*nlh
;
2489 struct rtgenmsg
*rtgenm
;
2490 struct mrt6msg
*msg
;
2491 struct sk_buff
*skb
;
2495 payloadlen
= pkt
->len
- sizeof(struct mrt6msg
);
2496 msg
= (struct mrt6msg
*)skb_transport_header(pkt
);
2498 skb
= nlmsg_new(mrt6msg_netlink_msgsize(payloadlen
), GFP_ATOMIC
);
2502 nlh
= nlmsg_put(skb
, 0, 0, RTM_NEWCACHEREPORT
,
2503 sizeof(struct rtgenmsg
), 0);
2506 rtgenm
= nlmsg_data(nlh
);
2507 rtgenm
->rtgen_family
= RTNL_FAMILY_IP6MR
;
2508 if (nla_put_u8(skb
, IP6MRA_CREPORT_MSGTYPE
, msg
->im6_msgtype
) ||
2509 nla_put_u32(skb
, IP6MRA_CREPORT_MIF_ID
, msg
->im6_mif
) ||
2510 nla_put_in6_addr(skb
, IP6MRA_CREPORT_SRC_ADDR
,
2512 nla_put_in6_addr(skb
, IP6MRA_CREPORT_DST_ADDR
,
2514 goto nla_put_failure
;
2516 nla
= nla_reserve(skb
, IP6MRA_CREPORT_PKT
, payloadlen
);
2517 if (!nla
|| skb_copy_bits(pkt
, sizeof(struct mrt6msg
),
2518 nla_data(nla
), payloadlen
))
2519 goto nla_put_failure
;
2521 nlmsg_end(skb
, nlh
);
2523 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_MROUTE_R
, NULL
, GFP_ATOMIC
);
2527 nlmsg_cancel(skb
, nlh
);
2530 rtnl_set_sk_err(net
, RTNLGRP_IPV6_MROUTE_R
, -ENOBUFS
);
2533 static int ip6mr_rtm_dumproute(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2535 struct net
*net
= sock_net(skb
->sk
);
2536 struct mr6_table
*mrt
;
2537 struct mfc6_cache
*mfc
;
2538 unsigned int t
= 0, s_t
;
2539 unsigned int h
= 0, s_h
;
2540 unsigned int e
= 0, s_e
;
2546 read_lock(&mrt_lock
);
2547 ip6mr_for_each_table(mrt
, net
) {
2552 for (h
= s_h
; h
< MFC6_LINES
; h
++) {
2553 list_for_each_entry(mfc
, &mrt
->mfc6_cache_array
[h
], list
) {
2556 if (ip6mr_fill_mroute(mrt
, skb
,
2557 NETLINK_CB(cb
->skb
).portid
,
2567 spin_lock_bh(&mfc_unres_lock
);
2568 list_for_each_entry(mfc
, &mrt
->mfc6_unres_queue
, list
) {
2571 if (ip6mr_fill_mroute(mrt
, skb
,
2572 NETLINK_CB(cb
->skb
).portid
,
2576 spin_unlock_bh(&mfc_unres_lock
);
2582 spin_unlock_bh(&mfc_unres_lock
);
2589 read_unlock(&mrt_lock
);