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(unsigned long arg
);
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 setup_timer(&mrt
->ipmr_expire_timer
, ipmr_expire_process
,
326 #ifdef CONFIG_IPV6_PIMSM_V2
327 mrt
->mroute_reg_vif_num
= -1;
329 #ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES
330 list_add_tail_rcu(&mrt
->list
, &net
->ipv6
.mr6_tables
);
335 static void ip6mr_free_table(struct mr6_table
*mrt
)
337 del_timer_sync(&mrt
->ipmr_expire_timer
);
338 mroute_clean_tables(mrt
, true);
342 #ifdef CONFIG_PROC_FS
344 struct ipmr_mfc_iter
{
345 struct seq_net_private p
;
346 struct mr6_table
*mrt
;
347 struct list_head
*cache
;
352 static struct mfc6_cache
*ipmr_mfc_seq_idx(struct net
*net
,
353 struct ipmr_mfc_iter
*it
, loff_t pos
)
355 struct mr6_table
*mrt
= it
->mrt
;
356 struct mfc6_cache
*mfc
;
358 read_lock(&mrt_lock
);
359 for (it
->ct
= 0; it
->ct
< MFC6_LINES
; it
->ct
++) {
360 it
->cache
= &mrt
->mfc6_cache_array
[it
->ct
];
361 list_for_each_entry(mfc
, it
->cache
, list
)
365 read_unlock(&mrt_lock
);
367 spin_lock_bh(&mfc_unres_lock
);
368 it
->cache
= &mrt
->mfc6_unres_queue
;
369 list_for_each_entry(mfc
, it
->cache
, list
)
372 spin_unlock_bh(&mfc_unres_lock
);
379 * The /proc interfaces to multicast routing /proc/ip6_mr_cache /proc/ip6_mr_vif
382 struct ipmr_vif_iter
{
383 struct seq_net_private p
;
384 struct mr6_table
*mrt
;
388 static struct mif_device
*ip6mr_vif_seq_idx(struct net
*net
,
389 struct ipmr_vif_iter
*iter
,
392 struct mr6_table
*mrt
= iter
->mrt
;
394 for (iter
->ct
= 0; iter
->ct
< mrt
->maxvif
; ++iter
->ct
) {
395 if (!MIF_EXISTS(mrt
, iter
->ct
))
398 return &mrt
->vif6_table
[iter
->ct
];
403 static void *ip6mr_vif_seq_start(struct seq_file
*seq
, loff_t
*pos
)
406 struct ipmr_vif_iter
*iter
= seq
->private;
407 struct net
*net
= seq_file_net(seq
);
408 struct mr6_table
*mrt
;
410 mrt
= ip6mr_get_table(net
, RT6_TABLE_DFLT
);
412 return ERR_PTR(-ENOENT
);
416 read_lock(&mrt_lock
);
417 return *pos
? ip6mr_vif_seq_idx(net
, seq
->private, *pos
- 1)
421 static void *ip6mr_vif_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
423 struct ipmr_vif_iter
*iter
= seq
->private;
424 struct net
*net
= seq_file_net(seq
);
425 struct mr6_table
*mrt
= iter
->mrt
;
428 if (v
== SEQ_START_TOKEN
)
429 return ip6mr_vif_seq_idx(net
, iter
, 0);
431 while (++iter
->ct
< mrt
->maxvif
) {
432 if (!MIF_EXISTS(mrt
, iter
->ct
))
434 return &mrt
->vif6_table
[iter
->ct
];
439 static void ip6mr_vif_seq_stop(struct seq_file
*seq
, void *v
)
442 read_unlock(&mrt_lock
);
445 static int ip6mr_vif_seq_show(struct seq_file
*seq
, void *v
)
447 struct ipmr_vif_iter
*iter
= seq
->private;
448 struct mr6_table
*mrt
= iter
->mrt
;
450 if (v
== SEQ_START_TOKEN
) {
452 "Interface BytesIn PktsIn BytesOut PktsOut Flags\n");
454 const struct mif_device
*vif
= v
;
455 const char *name
= vif
->dev
? vif
->dev
->name
: "none";
458 "%2td %-10s %8ld %7ld %8ld %7ld %05X\n",
459 vif
- mrt
->vif6_table
,
460 name
, vif
->bytes_in
, vif
->pkt_in
,
461 vif
->bytes_out
, vif
->pkt_out
,
467 static const struct seq_operations ip6mr_vif_seq_ops
= {
468 .start
= ip6mr_vif_seq_start
,
469 .next
= ip6mr_vif_seq_next
,
470 .stop
= ip6mr_vif_seq_stop
,
471 .show
= ip6mr_vif_seq_show
,
474 static int ip6mr_vif_open(struct inode
*inode
, struct file
*file
)
476 return seq_open_net(inode
, file
, &ip6mr_vif_seq_ops
,
477 sizeof(struct ipmr_vif_iter
));
480 static const struct file_operations ip6mr_vif_fops
= {
481 .owner
= THIS_MODULE
,
482 .open
= ip6mr_vif_open
,
485 .release
= seq_release_net
,
488 static void *ipmr_mfc_seq_start(struct seq_file
*seq
, loff_t
*pos
)
490 struct ipmr_mfc_iter
*it
= seq
->private;
491 struct net
*net
= seq_file_net(seq
);
492 struct mr6_table
*mrt
;
494 mrt
= ip6mr_get_table(net
, RT6_TABLE_DFLT
);
496 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(unsigned long arg
)
893 struct mr6_table
*mrt
= (struct mr6_table
*)arg
;
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
))
1802 raw6_sk(sk
)->ip6mr_table
= v
;
1808 * Spurious command, or MRT6_VERSION which you cannot
1812 return -ENOPROTOOPT
;
1817 * Getsock opt support for the multicast routing system.
1820 int ip6_mroute_getsockopt(struct sock
*sk
, int optname
, char __user
*optval
,
1825 struct net
*net
= sock_net(sk
);
1826 struct mr6_table
*mrt
;
1828 if (sk
->sk_type
!= SOCK_RAW
||
1829 inet_sk(sk
)->inet_num
!= IPPROTO_ICMPV6
)
1832 mrt
= ip6mr_get_table(net
, raw6_sk(sk
)->ip6mr_table
? : RT6_TABLE_DFLT
);
1840 #ifdef CONFIG_IPV6_PIMSM_V2
1842 val
= mrt
->mroute_do_pim
;
1846 val
= mrt
->mroute_do_assert
;
1849 return -ENOPROTOOPT
;
1852 if (get_user(olr
, optlen
))
1855 olr
= min_t(int, olr
, sizeof(int));
1859 if (put_user(olr
, optlen
))
1861 if (copy_to_user(optval
, &val
, olr
))
1867 * The IP multicast ioctl support routines.
1870 int ip6mr_ioctl(struct sock
*sk
, int cmd
, void __user
*arg
)
1872 struct sioc_sg_req6 sr
;
1873 struct sioc_mif_req6 vr
;
1874 struct mif_device
*vif
;
1875 struct mfc6_cache
*c
;
1876 struct net
*net
= sock_net(sk
);
1877 struct mr6_table
*mrt
;
1879 mrt
= ip6mr_get_table(net
, raw6_sk(sk
)->ip6mr_table
? : RT6_TABLE_DFLT
);
1884 case SIOCGETMIFCNT_IN6
:
1885 if (copy_from_user(&vr
, arg
, sizeof(vr
)))
1887 if (vr
.mifi
>= mrt
->maxvif
)
1889 read_lock(&mrt_lock
);
1890 vif
= &mrt
->vif6_table
[vr
.mifi
];
1891 if (MIF_EXISTS(mrt
, vr
.mifi
)) {
1892 vr
.icount
= vif
->pkt_in
;
1893 vr
.ocount
= vif
->pkt_out
;
1894 vr
.ibytes
= vif
->bytes_in
;
1895 vr
.obytes
= vif
->bytes_out
;
1896 read_unlock(&mrt_lock
);
1898 if (copy_to_user(arg
, &vr
, sizeof(vr
)))
1902 read_unlock(&mrt_lock
);
1903 return -EADDRNOTAVAIL
;
1904 case SIOCGETSGCNT_IN6
:
1905 if (copy_from_user(&sr
, arg
, sizeof(sr
)))
1908 read_lock(&mrt_lock
);
1909 c
= ip6mr_cache_find(mrt
, &sr
.src
.sin6_addr
, &sr
.grp
.sin6_addr
);
1911 sr
.pktcnt
= c
->mfc_un
.res
.pkt
;
1912 sr
.bytecnt
= c
->mfc_un
.res
.bytes
;
1913 sr
.wrong_if
= c
->mfc_un
.res
.wrong_if
;
1914 read_unlock(&mrt_lock
);
1916 if (copy_to_user(arg
, &sr
, sizeof(sr
)))
1920 read_unlock(&mrt_lock
);
1921 return -EADDRNOTAVAIL
;
1923 return -ENOIOCTLCMD
;
1927 #ifdef CONFIG_COMPAT
1928 struct compat_sioc_sg_req6
{
1929 struct sockaddr_in6 src
;
1930 struct sockaddr_in6 grp
;
1931 compat_ulong_t pktcnt
;
1932 compat_ulong_t bytecnt
;
1933 compat_ulong_t wrong_if
;
1936 struct compat_sioc_mif_req6
{
1938 compat_ulong_t icount
;
1939 compat_ulong_t ocount
;
1940 compat_ulong_t ibytes
;
1941 compat_ulong_t obytes
;
1944 int ip6mr_compat_ioctl(struct sock
*sk
, unsigned int cmd
, void __user
*arg
)
1946 struct compat_sioc_sg_req6 sr
;
1947 struct compat_sioc_mif_req6 vr
;
1948 struct mif_device
*vif
;
1949 struct mfc6_cache
*c
;
1950 struct net
*net
= sock_net(sk
);
1951 struct mr6_table
*mrt
;
1953 mrt
= ip6mr_get_table(net
, raw6_sk(sk
)->ip6mr_table
? : RT6_TABLE_DFLT
);
1958 case SIOCGETMIFCNT_IN6
:
1959 if (copy_from_user(&vr
, arg
, sizeof(vr
)))
1961 if (vr
.mifi
>= mrt
->maxvif
)
1963 read_lock(&mrt_lock
);
1964 vif
= &mrt
->vif6_table
[vr
.mifi
];
1965 if (MIF_EXISTS(mrt
, vr
.mifi
)) {
1966 vr
.icount
= vif
->pkt_in
;
1967 vr
.ocount
= vif
->pkt_out
;
1968 vr
.ibytes
= vif
->bytes_in
;
1969 vr
.obytes
= vif
->bytes_out
;
1970 read_unlock(&mrt_lock
);
1972 if (copy_to_user(arg
, &vr
, sizeof(vr
)))
1976 read_unlock(&mrt_lock
);
1977 return -EADDRNOTAVAIL
;
1978 case SIOCGETSGCNT_IN6
:
1979 if (copy_from_user(&sr
, arg
, sizeof(sr
)))
1982 read_lock(&mrt_lock
);
1983 c
= ip6mr_cache_find(mrt
, &sr
.src
.sin6_addr
, &sr
.grp
.sin6_addr
);
1985 sr
.pktcnt
= c
->mfc_un
.res
.pkt
;
1986 sr
.bytecnt
= c
->mfc_un
.res
.bytes
;
1987 sr
.wrong_if
= c
->mfc_un
.res
.wrong_if
;
1988 read_unlock(&mrt_lock
);
1990 if (copy_to_user(arg
, &sr
, sizeof(sr
)))
1994 read_unlock(&mrt_lock
);
1995 return -EADDRNOTAVAIL
;
1997 return -ENOIOCTLCMD
;
2002 static inline int ip6mr_forward2_finish(struct net
*net
, struct sock
*sk
, struct sk_buff
*skb
)
2004 __IP6_INC_STATS(net
, ip6_dst_idev(skb_dst(skb
)),
2005 IPSTATS_MIB_OUTFORWDATAGRAMS
);
2006 __IP6_ADD_STATS(net
, ip6_dst_idev(skb_dst(skb
)),
2007 IPSTATS_MIB_OUTOCTETS
, skb
->len
);
2008 return dst_output(net
, sk
, skb
);
2012 * Processing handlers for ip6mr_forward
2015 static int ip6mr_forward2(struct net
*net
, struct mr6_table
*mrt
,
2016 struct sk_buff
*skb
, struct mfc6_cache
*c
, int vifi
)
2018 struct ipv6hdr
*ipv6h
;
2019 struct mif_device
*vif
= &mrt
->vif6_table
[vifi
];
2020 struct net_device
*dev
;
2021 struct dst_entry
*dst
;
2027 #ifdef CONFIG_IPV6_PIMSM_V2
2028 if (vif
->flags
& MIFF_REGISTER
) {
2030 vif
->bytes_out
+= skb
->len
;
2031 vif
->dev
->stats
.tx_bytes
+= skb
->len
;
2032 vif
->dev
->stats
.tx_packets
++;
2033 ip6mr_cache_report(mrt
, skb
, vifi
, MRT6MSG_WHOLEPKT
);
2038 ipv6h
= ipv6_hdr(skb
);
2040 fl6
= (struct flowi6
) {
2041 .flowi6_oif
= vif
->link
,
2042 .daddr
= ipv6h
->daddr
,
2045 dst
= ip6_route_output(net
, NULL
, &fl6
);
2052 skb_dst_set(skb
, dst
);
2055 * RFC1584 teaches, that DVMRP/PIM router must deliver packets locally
2056 * not only before forwarding, but after forwarding on all output
2057 * interfaces. It is clear, if mrouter runs a multicasting
2058 * program, it should receive packets not depending to what interface
2059 * program is joined.
2060 * If we will not make it, the program will have to join on all
2061 * interfaces. On the other hand, multihoming host (or router, but
2062 * not mrouter) cannot join to more than one interface - it will
2063 * result in receiving multiple packets.
2068 vif
->bytes_out
+= skb
->len
;
2070 /* We are about to write */
2071 /* XXX: extension headers? */
2072 if (skb_cow(skb
, sizeof(*ipv6h
) + LL_RESERVED_SPACE(dev
)))
2075 ipv6h
= ipv6_hdr(skb
);
2078 IP6CB(skb
)->flags
|= IP6SKB_FORWARDED
;
2080 return NF_HOOK(NFPROTO_IPV6
, NF_INET_FORWARD
,
2081 net
, NULL
, skb
, skb
->dev
, dev
,
2082 ip6mr_forward2_finish
);
2089 static int ip6mr_find_vif(struct mr6_table
*mrt
, struct net_device
*dev
)
2093 for (ct
= mrt
->maxvif
- 1; ct
>= 0; ct
--) {
2094 if (mrt
->vif6_table
[ct
].dev
== dev
)
2100 static void ip6_mr_forward(struct net
*net
, struct mr6_table
*mrt
,
2101 struct sk_buff
*skb
, struct mfc6_cache
*cache
)
2105 int true_vifi
= ip6mr_find_vif(mrt
, skb
->dev
);
2107 vif
= cache
->mf6c_parent
;
2108 cache
->mfc_un
.res
.pkt
++;
2109 cache
->mfc_un
.res
.bytes
+= skb
->len
;
2110 cache
->mfc_un
.res
.lastuse
= jiffies
;
2112 if (ipv6_addr_any(&cache
->mf6c_origin
) && true_vifi
>= 0) {
2113 struct mfc6_cache
*cache_proxy
;
2115 /* For an (*,G) entry, we only check that the incoming
2116 * interface is part of the static tree.
2118 cache_proxy
= ip6mr_cache_find_any_parent(mrt
, vif
);
2120 cache_proxy
->mfc_un
.res
.ttls
[true_vifi
] < 255)
2125 * Wrong interface: drop packet and (maybe) send PIM assert.
2127 if (mrt
->vif6_table
[vif
].dev
!= skb
->dev
) {
2128 cache
->mfc_un
.res
.wrong_if
++;
2130 if (true_vifi
>= 0 && mrt
->mroute_do_assert
&&
2131 /* pimsm uses asserts, when switching from RPT to SPT,
2132 so that we cannot check that packet arrived on an oif.
2133 It is bad, but otherwise we would need to move pretty
2134 large chunk of pimd to kernel. Ough... --ANK
2136 (mrt
->mroute_do_pim
||
2137 cache
->mfc_un
.res
.ttls
[true_vifi
] < 255) &&
2139 cache
->mfc_un
.res
.last_assert
+ MFC_ASSERT_THRESH
)) {
2140 cache
->mfc_un
.res
.last_assert
= jiffies
;
2141 ip6mr_cache_report(mrt
, skb
, true_vifi
, MRT6MSG_WRONGMIF
);
2147 mrt
->vif6_table
[vif
].pkt_in
++;
2148 mrt
->vif6_table
[vif
].bytes_in
+= skb
->len
;
2153 if (ipv6_addr_any(&cache
->mf6c_origin
) &&
2154 ipv6_addr_any(&cache
->mf6c_mcastgrp
)) {
2155 if (true_vifi
>= 0 &&
2156 true_vifi
!= cache
->mf6c_parent
&&
2157 ipv6_hdr(skb
)->hop_limit
>
2158 cache
->mfc_un
.res
.ttls
[cache
->mf6c_parent
]) {
2159 /* It's an (*,*) entry and the packet is not coming from
2160 * the upstream: forward the packet to the upstream
2163 psend
= cache
->mf6c_parent
;
2168 for (ct
= cache
->mfc_un
.res
.maxvif
- 1; ct
>= cache
->mfc_un
.res
.minvif
; ct
--) {
2169 /* For (*,G) entry, don't forward to the incoming interface */
2170 if ((!ipv6_addr_any(&cache
->mf6c_origin
) || ct
!= true_vifi
) &&
2171 ipv6_hdr(skb
)->hop_limit
> cache
->mfc_un
.res
.ttls
[ct
]) {
2173 struct sk_buff
*skb2
= skb_clone(skb
, GFP_ATOMIC
);
2175 ip6mr_forward2(net
, mrt
, skb2
, cache
, psend
);
2182 ip6mr_forward2(net
, mrt
, skb
, cache
, psend
);
2192 * Multicast packets for forwarding arrive here
2195 int ip6_mr_input(struct sk_buff
*skb
)
2197 struct mfc6_cache
*cache
;
2198 struct net
*net
= dev_net(skb
->dev
);
2199 struct mr6_table
*mrt
;
2200 struct flowi6 fl6
= {
2201 .flowi6_iif
= skb
->dev
->ifindex
,
2202 .flowi6_mark
= skb
->mark
,
2206 err
= ip6mr_fib_lookup(net
, &fl6
, &mrt
);
2212 read_lock(&mrt_lock
);
2213 cache
= ip6mr_cache_find(mrt
,
2214 &ipv6_hdr(skb
)->saddr
, &ipv6_hdr(skb
)->daddr
);
2216 int vif
= ip6mr_find_vif(mrt
, skb
->dev
);
2219 cache
= ip6mr_cache_find_any(mrt
,
2220 &ipv6_hdr(skb
)->daddr
,
2225 * No usable cache entry
2230 vif
= ip6mr_find_vif(mrt
, skb
->dev
);
2232 int err
= ip6mr_cache_unresolved(mrt
, vif
, skb
);
2233 read_unlock(&mrt_lock
);
2237 read_unlock(&mrt_lock
);
2242 ip6_mr_forward(net
, mrt
, skb
, cache
);
2244 read_unlock(&mrt_lock
);
2250 static int __ip6mr_fill_mroute(struct mr6_table
*mrt
, struct sk_buff
*skb
,
2251 struct mfc6_cache
*c
, struct rtmsg
*rtm
)
2253 struct rta_mfc_stats mfcs
;
2254 struct nlattr
*mp_attr
;
2255 struct rtnexthop
*nhp
;
2256 unsigned long lastuse
;
2259 /* If cache is unresolved, don't try to parse IIF and OIF */
2260 if (c
->mf6c_parent
>= MAXMIFS
) {
2261 rtm
->rtm_flags
|= RTNH_F_UNRESOLVED
;
2265 if (MIF_EXISTS(mrt
, c
->mf6c_parent
) &&
2266 nla_put_u32(skb
, RTA_IIF
, mrt
->vif6_table
[c
->mf6c_parent
].dev
->ifindex
) < 0)
2268 mp_attr
= nla_nest_start(skb
, RTA_MULTIPATH
);
2272 for (ct
= c
->mfc_un
.res
.minvif
; ct
< c
->mfc_un
.res
.maxvif
; ct
++) {
2273 if (MIF_EXISTS(mrt
, ct
) && c
->mfc_un
.res
.ttls
[ct
] < 255) {
2274 nhp
= nla_reserve_nohdr(skb
, sizeof(*nhp
));
2276 nla_nest_cancel(skb
, mp_attr
);
2280 nhp
->rtnh_flags
= 0;
2281 nhp
->rtnh_hops
= c
->mfc_un
.res
.ttls
[ct
];
2282 nhp
->rtnh_ifindex
= mrt
->vif6_table
[ct
].dev
->ifindex
;
2283 nhp
->rtnh_len
= sizeof(*nhp
);
2287 nla_nest_end(skb
, mp_attr
);
2289 lastuse
= READ_ONCE(c
->mfc_un
.res
.lastuse
);
2290 lastuse
= time_after_eq(jiffies
, lastuse
) ? jiffies
- lastuse
: 0;
2292 mfcs
.mfcs_packets
= c
->mfc_un
.res
.pkt
;
2293 mfcs
.mfcs_bytes
= c
->mfc_un
.res
.bytes
;
2294 mfcs
.mfcs_wrong_if
= c
->mfc_un
.res
.wrong_if
;
2295 if (nla_put_64bit(skb
, RTA_MFC_STATS
, sizeof(mfcs
), &mfcs
, RTA_PAD
) ||
2296 nla_put_u64_64bit(skb
, RTA_EXPIRES
, jiffies_to_clock_t(lastuse
),
2300 rtm
->rtm_type
= RTN_MULTICAST
;
2304 int ip6mr_get_route(struct net
*net
, struct sk_buff
*skb
, struct rtmsg
*rtm
,
2308 struct mr6_table
*mrt
;
2309 struct mfc6_cache
*cache
;
2310 struct rt6_info
*rt
= (struct rt6_info
*)skb_dst(skb
);
2312 mrt
= ip6mr_get_table(net
, RT6_TABLE_DFLT
);
2316 read_lock(&mrt_lock
);
2317 cache
= ip6mr_cache_find(mrt
, &rt
->rt6i_src
.addr
, &rt
->rt6i_dst
.addr
);
2318 if (!cache
&& skb
->dev
) {
2319 int vif
= ip6mr_find_vif(mrt
, skb
->dev
);
2322 cache
= ip6mr_cache_find_any(mrt
, &rt
->rt6i_dst
.addr
,
2327 struct sk_buff
*skb2
;
2328 struct ipv6hdr
*iph
;
2329 struct net_device
*dev
;
2333 if (!dev
|| (vif
= ip6mr_find_vif(mrt
, dev
)) < 0) {
2334 read_unlock(&mrt_lock
);
2338 /* really correct? */
2339 skb2
= alloc_skb(sizeof(struct ipv6hdr
), GFP_ATOMIC
);
2341 read_unlock(&mrt_lock
);
2345 NETLINK_CB(skb2
).portid
= portid
;
2346 skb_reset_transport_header(skb2
);
2348 skb_put(skb2
, sizeof(struct ipv6hdr
));
2349 skb_reset_network_header(skb2
);
2351 iph
= ipv6_hdr(skb2
);
2354 iph
->flow_lbl
[0] = 0;
2355 iph
->flow_lbl
[1] = 0;
2356 iph
->flow_lbl
[2] = 0;
2357 iph
->payload_len
= 0;
2358 iph
->nexthdr
= IPPROTO_NONE
;
2360 iph
->saddr
= rt
->rt6i_src
.addr
;
2361 iph
->daddr
= rt
->rt6i_dst
.addr
;
2363 err
= ip6mr_cache_unresolved(mrt
, vif
, skb2
);
2364 read_unlock(&mrt_lock
);
2369 if (rtm
->rtm_flags
& RTM_F_NOTIFY
)
2370 cache
->mfc_flags
|= MFC_NOTIFY
;
2372 err
= __ip6mr_fill_mroute(mrt
, skb
, cache
, rtm
);
2373 read_unlock(&mrt_lock
);
2377 static int ip6mr_fill_mroute(struct mr6_table
*mrt
, struct sk_buff
*skb
,
2378 u32 portid
, u32 seq
, struct mfc6_cache
*c
, int cmd
,
2381 struct nlmsghdr
*nlh
;
2385 nlh
= nlmsg_put(skb
, portid
, seq
, cmd
, sizeof(*rtm
), flags
);
2389 rtm
= nlmsg_data(nlh
);
2390 rtm
->rtm_family
= RTNL_FAMILY_IP6MR
;
2391 rtm
->rtm_dst_len
= 128;
2392 rtm
->rtm_src_len
= 128;
2394 rtm
->rtm_table
= mrt
->id
;
2395 if (nla_put_u32(skb
, RTA_TABLE
, mrt
->id
))
2396 goto nla_put_failure
;
2397 rtm
->rtm_type
= RTN_MULTICAST
;
2398 rtm
->rtm_scope
= RT_SCOPE_UNIVERSE
;
2399 if (c
->mfc_flags
& MFC_STATIC
)
2400 rtm
->rtm_protocol
= RTPROT_STATIC
;
2402 rtm
->rtm_protocol
= RTPROT_MROUTED
;
2405 if (nla_put_in6_addr(skb
, RTA_SRC
, &c
->mf6c_origin
) ||
2406 nla_put_in6_addr(skb
, RTA_DST
, &c
->mf6c_mcastgrp
))
2407 goto nla_put_failure
;
2408 err
= __ip6mr_fill_mroute(mrt
, skb
, c
, rtm
);
2409 /* do not break the dump if cache is unresolved */
2410 if (err
< 0 && err
!= -ENOENT
)
2411 goto nla_put_failure
;
2413 nlmsg_end(skb
, nlh
);
2417 nlmsg_cancel(skb
, nlh
);
2421 static int mr6_msgsize(bool unresolved
, int maxvif
)
2424 NLMSG_ALIGN(sizeof(struct rtmsg
))
2425 + nla_total_size(4) /* RTA_TABLE */
2426 + nla_total_size(sizeof(struct in6_addr
)) /* RTA_SRC */
2427 + nla_total_size(sizeof(struct in6_addr
)) /* RTA_DST */
2432 + nla_total_size(4) /* RTA_IIF */
2433 + nla_total_size(0) /* RTA_MULTIPATH */
2434 + maxvif
* NLA_ALIGN(sizeof(struct rtnexthop
))
2436 + nla_total_size_64bit(sizeof(struct rta_mfc_stats
))
2442 static void mr6_netlink_event(struct mr6_table
*mrt
, struct mfc6_cache
*mfc
,
2445 struct net
*net
= read_pnet(&mrt
->net
);
2446 struct sk_buff
*skb
;
2449 skb
= nlmsg_new(mr6_msgsize(mfc
->mf6c_parent
>= MAXMIFS
, mrt
->maxvif
),
2454 err
= ip6mr_fill_mroute(mrt
, skb
, 0, 0, mfc
, cmd
, 0);
2458 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_MROUTE
, NULL
, GFP_ATOMIC
);
2464 rtnl_set_sk_err(net
, RTNLGRP_IPV6_MROUTE
, err
);
2467 static size_t mrt6msg_netlink_msgsize(size_t payloadlen
)
2470 NLMSG_ALIGN(sizeof(struct rtgenmsg
))
2471 + nla_total_size(1) /* IP6MRA_CREPORT_MSGTYPE */
2472 + nla_total_size(4) /* IP6MRA_CREPORT_MIF_ID */
2473 /* IP6MRA_CREPORT_SRC_ADDR */
2474 + nla_total_size(sizeof(struct in6_addr
))
2475 /* IP6MRA_CREPORT_DST_ADDR */
2476 + nla_total_size(sizeof(struct in6_addr
))
2477 /* IP6MRA_CREPORT_PKT */
2478 + nla_total_size(payloadlen
)
2484 static void mrt6msg_netlink_event(struct mr6_table
*mrt
, struct sk_buff
*pkt
)
2486 struct net
*net
= read_pnet(&mrt
->net
);
2487 struct nlmsghdr
*nlh
;
2488 struct rtgenmsg
*rtgenm
;
2489 struct mrt6msg
*msg
;
2490 struct sk_buff
*skb
;
2494 payloadlen
= pkt
->len
- sizeof(struct mrt6msg
);
2495 msg
= (struct mrt6msg
*)skb_transport_header(pkt
);
2497 skb
= nlmsg_new(mrt6msg_netlink_msgsize(payloadlen
), GFP_ATOMIC
);
2501 nlh
= nlmsg_put(skb
, 0, 0, RTM_NEWCACHEREPORT
,
2502 sizeof(struct rtgenmsg
), 0);
2505 rtgenm
= nlmsg_data(nlh
);
2506 rtgenm
->rtgen_family
= RTNL_FAMILY_IP6MR
;
2507 if (nla_put_u8(skb
, IP6MRA_CREPORT_MSGTYPE
, msg
->im6_msgtype
) ||
2508 nla_put_u32(skb
, IP6MRA_CREPORT_MIF_ID
, msg
->im6_mif
) ||
2509 nla_put_in6_addr(skb
, IP6MRA_CREPORT_SRC_ADDR
,
2511 nla_put_in6_addr(skb
, IP6MRA_CREPORT_DST_ADDR
,
2513 goto nla_put_failure
;
2515 nla
= nla_reserve(skb
, IP6MRA_CREPORT_PKT
, payloadlen
);
2516 if (!nla
|| skb_copy_bits(pkt
, sizeof(struct mrt6msg
),
2517 nla_data(nla
), payloadlen
))
2518 goto nla_put_failure
;
2520 nlmsg_end(skb
, nlh
);
2522 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_MROUTE_R
, NULL
, GFP_ATOMIC
);
2526 nlmsg_cancel(skb
, nlh
);
2529 rtnl_set_sk_err(net
, RTNLGRP_IPV6_MROUTE_R
, -ENOBUFS
);
2532 static int ip6mr_rtm_dumproute(struct sk_buff
*skb
, struct netlink_callback
*cb
)
2534 struct net
*net
= sock_net(skb
->sk
);
2535 struct mr6_table
*mrt
;
2536 struct mfc6_cache
*mfc
;
2537 unsigned int t
= 0, s_t
;
2538 unsigned int h
= 0, s_h
;
2539 unsigned int e
= 0, s_e
;
2545 read_lock(&mrt_lock
);
2546 ip6mr_for_each_table(mrt
, net
) {
2551 for (h
= s_h
; h
< MFC6_LINES
; h
++) {
2552 list_for_each_entry(mfc
, &mrt
->mfc6_cache_array
[h
], list
) {
2555 if (ip6mr_fill_mroute(mrt
, skb
,
2556 NETLINK_CB(cb
->skb
).portid
,
2566 spin_lock_bh(&mfc_unres_lock
);
2567 list_for_each_entry(mfc
, &mrt
->mfc6_unres_queue
, list
) {
2570 if (ip6mr_fill_mroute(mrt
, skb
,
2571 NETLINK_CB(cb
->skb
).portid
,
2575 spin_unlock_bh(&mfc_unres_lock
);
2581 spin_unlock_bh(&mfc_unres_lock
);
2588 read_unlock(&mrt_lock
);