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Commit bf47f4b0 authored by David S. Miller's avatar David S. Miller
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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/ipmr-2.6

parents 0b9715e6 5b285cac
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Showing with 703 additions and 298 deletions
include/linux/ipv6.h
View file @ bf47f4b0
......@@ -383,6 +383,7 @@ struct raw6_sock {
__u32 checksum; /* perform checksum */
__u32 offset; /* checksum offset */
struct icmp6_filter filter;
__u32 ip6mr_table;
/* ipv6_pinfo has to be the last member of raw6_sock, see inet6_sk_generic */
struct ipv6_pinfo inet6;
};
......
include/linux/mroute6.h
View file @ bf47f4b0
......@@ -24,7 +24,8 @@
#define MRT6_DEL_MFC (MRT6_BASE+5) /* Delete a multicast forwarding entry */
#define MRT6_VERSION (MRT6_BASE+6) /* Get the kernel multicast version */
#define MRT6_ASSERT (MRT6_BASE+7) /* Activate PIM assert mode */
#define MRT6_PIM (MRT6_BASE+8) /* enable PIM code */
#define MRT6_PIM (MRT6_BASE+8) /* enable PIM code */
#define MRT6_TABLE (MRT6_BASE+9) /* Specify mroute table ID */
#define SIOCGETMIFCNT_IN6 SIOCPROTOPRIVATE /* IP protocol privates */
#define SIOCGETSGCNT_IN6 (SIOCPROTOPRIVATE+1)
......@@ -182,10 +183,7 @@ struct mif_device {
#define VIFF_STATIC 0x8000
struct mfc6_cache {
struct mfc6_cache *next; /* Next entry on cache line */
#ifdef CONFIG_NET_NS
struct net *mfc6_net;
#endif
struct list_head list;
struct in6_addr mf6c_mcastgrp; /* Group the entry belongs to */
struct in6_addr mf6c_origin; /* Source of packet */
mifi_t mf6c_parent; /* Source interface */
......@@ -208,18 +206,6 @@ struct mfc6_cache {
} mfc_un;
};
static inline
struct net *mfc6_net(const struct mfc6_cache *mfc)
{
return read_pnet(&mfc->mfc6_net);
}
static inline
void mfc6_net_set(struct mfc6_cache *mfc, struct net *net)
{
write_pnet(&mfc->mfc6_net, hold_net(net));
}
#define MFC_STATIC 1
#define MFC_NOTIFY 2
......@@ -244,14 +230,17 @@ extern int ip6mr_get_route(struct net *net, struct sk_buff *skb,
struct rtmsg *rtm, int nowait);
#ifdef CONFIG_IPV6_MROUTE
static inline struct sock *mroute6_socket(struct net *net)
{
return net->ipv6.mroute6_sk;
}
extern struct sock *mroute6_socket(struct net *net, struct sk_buff *skb);
extern int ip6mr_sk_done(struct sock *sk);
#else
static inline struct sock *mroute6_socket(struct net *net) { return NULL; }
static inline int ip6mr_sk_done(struct sock *sk) { return 0; }
static inline struct sock *mroute6_socket(struct net *net, struct sk_buff *skb)
{
return NULL;
}
static inline int ip6mr_sk_done(struct sock *sk)
{
return 0;
}
#endif
#endif
......
include/linux/rtnetlink.h
View file @ bf47f4b0
......@@ -11,7 +11,8 @@
* families, values above 128 may be used arbitrarily.
*/
#define RTNL_FAMILY_IPMR 128
#define RTNL_FAMILY_MAX 128
#define RTNL_FAMILY_IP6MR 129
#define RTNL_FAMILY_MAX 129
/****
* Routing/neighbour discovery messages.
......
include/net/netns/ipv6.h
View file @ bf47f4b0
......@@ -59,15 +59,11 @@ struct netns_ipv6 {
struct sock *tcp_sk;
struct sock *igmp_sk;
#ifdef CONFIG_IPV6_MROUTE
struct sock *mroute6_sk;
struct mfc6_cache **mfc6_cache_array;
struct mif_device *vif6_table;
int maxvif;
atomic_t cache_resolve_queue_len;
int mroute_do_assert;
int mroute_do_pim;
#ifdef CONFIG_IPV6_PIMSM_V2
int mroute_reg_vif_num;
#ifndef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES
struct mr6_table *mrt6;
#else
struct list_head mr6_tables;
struct fib_rules_ops *mr6_rules_ops;
#endif
#endif
};
......
net/ipv6/Kconfig
View file @ bf47f4b0
......@@ -229,6 +229,20 @@ config IPV6_MROUTE
Experimental support for IPv6 multicast forwarding.
If unsure, say N.
config IPV6_MROUTE_MULTIPLE_TABLES
bool "IPv6: multicast policy routing"
depends on IPV6_MROUTE
select FIB_RULES
help
Normally, a multicast router runs a userspace daemon and decides
what to do with a multicast packet based on the source and
destination addresses. If you say Y here, the multicast router
will also be able to take interfaces and packet marks into
account and run multiple instances of userspace daemons
simultaneously, each one handling a single table.
If unsure, say N.
config IPV6_PIMSM_V2
bool "IPv6: PIM-SM version 2 support (EXPERIMENTAL)"
depends on IPV6_MROUTE
......
net/ipv6/ip6_output.c
View file @ bf47f4b0
......@@ -108,7 +108,7 @@ static int ip6_finish_output2(struct sk_buff *skb)
struct inet6_dev *idev = ip6_dst_idev(skb_dst(skb));
if (!(dev->flags & IFF_LOOPBACK) && sk_mc_loop(skb->sk) &&
((mroute6_socket(dev_net(dev)) &&
((mroute6_socket(dev_net(dev), skb) &&
!(IP6CB(skb)->flags & IP6SKB_FORWARDED)) ||
ipv6_chk_mcast_addr(dev, &ipv6_hdr(skb)->daddr,
&ipv6_hdr(skb)->saddr))) {
......
net/ipv6/ip6mr.c
View file @ bf47f4b0
......@@ -42,6 +42,7 @@
#include <linux/if_arp.h>
#include <net/checksum.h>
#include <net/netlink.h>
#include <net/fib_rules.h>
#include <net/ipv6.h>
#include <net/ip6_route.h>
......@@ -51,6 +52,34 @@
#include <linux/netfilter_ipv6.h>
#include <net/ip6_checksum.h>
struct mr6_table {
struct list_head list;
#ifdef CONFIG_NET_NS
struct net *net;
#endif
u32 id;
struct sock *mroute6_sk;
struct timer_list ipmr_expire_timer;
struct list_head mfc6_unres_queue;
struct list_head mfc6_cache_array[MFC6_LINES];
struct mif_device vif6_table[MAXMIFS];
int maxvif;
atomic_t cache_resolve_queue_len;
int mroute_do_assert;
int mroute_do_pim;
#ifdef CONFIG_IPV6_PIMSM_V2
int mroute_reg_vif_num;
#endif
};
struct ip6mr_rule {
struct fib_rule common;
};
struct ip6mr_result {
struct mr6_table *mrt;
};
/* Big lock, protecting vif table, mrt cache and mroute socket state.
Note that the changes are semaphored via rtnl_lock.
*/
......@@ -61,9 +90,7 @@ static DEFINE_RWLOCK(mrt_lock);
* Multicast router control variables
*/
#define MIF_EXISTS(_net, _idx) ((_net)->ipv6.vif6_table[_idx].dev != NULL)
static struct mfc6_cache *mfc_unres_queue; /* Queue of unresolved entries */
#define MIF_EXISTS(_mrt, _idx) ((_mrt)->vif6_table[_idx].dev != NULL)
/* Special spinlock for queue of unresolved entries */
static DEFINE_SPINLOCK(mfc_unres_lock);
......@@ -78,20 +105,233 @@ static DEFINE_SPINLOCK(mfc_unres_lock);
static struct kmem_cache *mrt_cachep __read_mostly;
static int ip6_mr_forward(struct sk_buff *skb, struct mfc6_cache *cache);
static int ip6mr_cache_report(struct net *net, struct sk_buff *pkt,
static struct mr6_table *ip6mr_new_table(struct net *net, u32 id);
static void ip6mr_free_table(struct mr6_table *mrt);
static int ip6_mr_forward(struct net *net, struct mr6_table *mrt,
struct sk_buff *skb, struct mfc6_cache *cache);
static int ip6mr_cache_report(struct mr6_table *mrt, struct sk_buff *pkt,
mifi_t mifi, int assert);
static int ip6mr_fill_mroute(struct sk_buff *skb, struct mfc6_cache *c, struct rtmsg *rtm);
static void mroute_clean_tables(struct net *net);
static int __ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb,
struct mfc6_cache *c, struct rtmsg *rtm);
static int ip6mr_rtm_dumproute(struct sk_buff *skb,
struct netlink_callback *cb);
static void mroute_clean_tables(struct mr6_table *mrt);
static void ipmr_expire_process(unsigned long arg);
#ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES
#define ip6mr_for_each_table(mrt, met) \
list_for_each_entry_rcu(mrt, &net->ipv6.mr6_tables, list)
static struct mr6_table *ip6mr_get_table(struct net *net, u32 id)
{
struct mr6_table *mrt;
ip6mr_for_each_table(mrt, net) {
if (mrt->id == id)
return mrt;
}
return NULL;
}
static int ip6mr_fib_lookup(struct net *net, struct flowi *flp,
struct mr6_table **mrt)
{
struct ip6mr_result res;
struct fib_lookup_arg arg = { .result = &res, };
int err;
err = fib_rules_lookup(net->ipv6.mr6_rules_ops, flp, 0, &arg);
if (err < 0)
return err;
*mrt = res.mrt;
return 0;
}
static int ip6mr_rule_action(struct fib_rule *rule, struct flowi *flp,
int flags, struct fib_lookup_arg *arg)
{
struct ip6mr_result *res = arg->result;
struct mr6_table *mrt;
switch (rule->action) {
case FR_ACT_TO_TBL:
break;
case FR_ACT_UNREACHABLE:
return -ENETUNREACH;
case FR_ACT_PROHIBIT:
return -EACCES;
case FR_ACT_BLACKHOLE:
default:
return -EINVAL;
}
mrt = ip6mr_get_table(rule->fr_net, rule->table);
if (mrt == NULL)
return -EAGAIN;
res->mrt = mrt;
return 0;
}
static int ip6mr_rule_match(struct fib_rule *rule, struct flowi *flp, int flags)
{
return 1;
}
static const struct nla_policy ip6mr_rule_policy[FRA_MAX + 1] = {
FRA_GENERIC_POLICY,
};
static int ip6mr_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
struct fib_rule_hdr *frh, struct nlattr **tb)
{
return 0;
}
static int ip6mr_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh,
struct nlattr **tb)
{
return 1;
}
static int ip6mr_rule_fill(struct fib_rule *rule, struct sk_buff *skb,
struct fib_rule_hdr *frh)
{
frh->dst_len = 0;
frh->src_len = 0;
frh->tos = 0;
return 0;
}
static const struct fib_rules_ops __net_initdata ip6mr_rules_ops_template = {
.family = RTNL_FAMILY_IP6MR,
.rule_size = sizeof(struct ip6mr_rule),
.addr_size = sizeof(struct in6_addr),
.action = ip6mr_rule_action,
.match = ip6mr_rule_match,
.configure = ip6mr_rule_configure,
.compare = ip6mr_rule_compare,
.default_pref = fib_default_rule_pref,
.fill = ip6mr_rule_fill,
.nlgroup = RTNLGRP_IPV6_RULE,
.policy = ip6mr_rule_policy,
.owner = THIS_MODULE,
};
static struct timer_list ipmr_expire_timer;
static int __net_init ip6mr_rules_init(struct net *net)
{
struct fib_rules_ops *ops;
struct mr6_table *mrt;
int err;
ops = fib_rules_register(&ip6mr_rules_ops_template, net);
if (IS_ERR(ops))
return PTR_ERR(ops);
INIT_LIST_HEAD(&net->ipv6.mr6_tables);
mrt = ip6mr_new_table(net, RT6_TABLE_DFLT);
if (mrt == NULL) {
err = -ENOMEM;
goto err1;
}
err = fib_default_rule_add(ops, 0x7fff, RT6_TABLE_DFLT, 0);
if (err < 0)
goto err2;
net->ipv6.mr6_rules_ops = ops;
return 0;
err2:
kfree(mrt);
err1:
fib_rules_unregister(ops);
return err;
}
static void __net_exit ip6mr_rules_exit(struct net *net)
{
struct mr6_table *mrt, *next;
list_for_each_entry_safe(mrt, next, &net->ipv6.mr6_tables, list)
ip6mr_free_table(mrt);
fib_rules_unregister(net->ipv6.mr6_rules_ops);
}
#else
#define ip6mr_for_each_table(mrt, net) \
for (mrt = net->ipv6.mrt6; mrt; mrt = NULL)
static struct mr6_table *ip6mr_get_table(struct net *net, u32 id)
{
return net->ipv6.mrt6;
}
static int ip6mr_fib_lookup(struct net *net, struct flowi *flp,
struct mr6_table **mrt)
{
*mrt = net->ipv6.mrt6;
return 0;
}
static int __net_init ip6mr_rules_init(struct net *net)
{
net->ipv6.mrt6 = ip6mr_new_table(net, RT6_TABLE_DFLT);
return net->ipv6.mrt6 ? 0 : -ENOMEM;
}
static void __net_exit ip6mr_rules_exit(struct net *net)
{
ip6mr_free_table(net->ipv6.mrt6);
}
#endif
static struct mr6_table *ip6mr_new_table(struct net *net, u32 id)
{
struct mr6_table *mrt;
unsigned int i;
mrt = ip6mr_get_table(net, id);
if (mrt != NULL)
return mrt;
mrt = kzalloc(sizeof(*mrt), GFP_KERNEL);
if (mrt == NULL)
return NULL;
mrt->id = id;
write_pnet(&mrt->net, net);
/* Forwarding cache */
for (i = 0; i < MFC6_LINES; i++)
INIT_LIST_HEAD(&mrt->mfc6_cache_array[i]);
INIT_LIST_HEAD(&mrt->mfc6_unres_queue);
setup_timer(&mrt->ipmr_expire_timer, ipmr_expire_process,
(unsigned long)mrt);
#ifdef CONFIG_IPV6_PIMSM_V2
mrt->mroute_reg_vif_num = -1;
#endif
#ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES
list_add_tail_rcu(&mrt->list, &net->ipv6.mr6_tables);
#endif
return mrt;
}
static void ip6mr_free_table(struct mr6_table *mrt)
{
del_timer(&mrt->ipmr_expire_timer);
mroute_clean_tables(mrt);
kfree(mrt);
}
#ifdef CONFIG_PROC_FS
struct ipmr_mfc_iter {
struct seq_net_private p;
struct mfc6_cache **cache;
struct mr6_table *mrt;
struct list_head *cache;
int ct;
};
......@@ -99,22 +339,22 @@ struct ipmr_mfc_iter {
static struct mfc6_cache *ipmr_mfc_seq_idx(struct net *net,
struct ipmr_mfc_iter *it, loff_t pos)
{
struct mr6_table *mrt = it->mrt;
struct mfc6_cache *mfc;
it->cache = net->ipv6.mfc6_cache_array;
read_lock(&mrt_lock);
for (it->ct = 0; it->ct < MFC6_LINES; it->ct++)
for (mfc = net->ipv6.mfc6_cache_array[it->ct];
mfc; mfc = mfc->next)
for (it->ct = 0; it->ct < MFC6_LINES; it->ct++) {
it->cache = &mrt->mfc6_cache_array[it->ct];
list_for_each_entry(mfc, it->cache, list)
if (pos-- == 0)
return mfc;
}
read_unlock(&mrt_lock);
it->cache = &mfc_unres_queue;
spin_lock_bh(&mfc_unres_lock);
for (mfc = mfc_unres_queue; mfc; mfc = mfc->next)
if (net_eq(mfc6_net(mfc), net) &&
pos-- == 0)
it->cache = &mrt->mfc6_unres_queue;
list_for_each_entry(mfc, it->cache, list)
if (pos-- == 0)
return mfc;
spin_unlock_bh(&mfc_unres_lock);
......@@ -122,15 +362,13 @@ static struct mfc6_cache *ipmr_mfc_seq_idx(struct net *net,
return NULL;
}
/*
* The /proc interfaces to multicast routing /proc/ip6_mr_cache /proc/ip6_mr_vif
*/
struct ipmr_vif_iter {
struct seq_net_private p;
struct mr6_table *mrt;
int ct;
};
......@@ -138,11 +376,13 @@ static struct mif_device *ip6mr_vif_seq_idx(struct net *net,
struct ipmr_vif_iter *iter,
loff_t pos)
{
for (iter->ct = 0; iter->ct < net->ipv6.maxvif; ++iter->ct) {
if (!MIF_EXISTS(net, iter->ct))
struct mr6_table *mrt = iter->mrt;
for (iter->ct = 0; iter->ct < mrt->maxvif; ++iter->ct) {
if (!MIF_EXISTS(mrt, iter->ct))
continue;
if (pos-- == 0)
return &net->ipv6.vif6_table[iter->ct];
return &mrt->vif6_table[iter->ct];
}
return NULL;
}
......@@ -150,7 +390,15 @@ static struct mif_device *ip6mr_vif_seq_idx(struct net *net,
static void *ip6mr_vif_seq_start(struct seq_file *seq, loff_t *pos)
__acquires(mrt_lock)
{
struct ipmr_vif_iter *iter = seq->private;
struct net *net = seq_file_net(seq);
struct mr6_table *mrt;
mrt = ip6mr_get_table(net, RT6_TABLE_DFLT);
if (mrt == NULL)
return ERR_PTR(-ENOENT);
iter->mrt = mrt;
read_lock(&mrt_lock);
return *pos ? ip6mr_vif_seq_idx(net, seq->private, *pos - 1)
......@@ -161,15 +409,16 @@ static void *ip6mr_vif_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
struct ipmr_vif_iter *iter = seq->private;
struct net *net = seq_file_net(seq);
struct mr6_table *mrt = iter->mrt;
++*pos;
if (v == SEQ_START_TOKEN)
return ip6mr_vif_seq_idx(net, iter, 0);
while (++iter->ct < net->ipv6.maxvif) {
if (!MIF_EXISTS(net, iter->ct))
while (++iter->ct < mrt->maxvif) {
if (!MIF_EXISTS(mrt, iter->ct))
continue;
return &net->ipv6.vif6_table[iter->ct];
return &mrt->vif6_table[iter->ct];
}
return NULL;
}
......@@ -182,7 +431,8 @@ static void ip6mr_vif_seq_stop(struct seq_file *seq, void *v)
static int ip6mr_vif_seq_show(struct seq_file *seq, void *v)
{
struct net *net = seq_file_net(seq);
struct ipmr_vif_iter *iter = seq->private;
struct mr6_table *mrt = iter->mrt;
if (v == SEQ_START_TOKEN) {
seq_puts(seq,
......@@ -193,7 +443,7 @@ static int ip6mr_vif_seq_show(struct seq_file *seq, void *v)
seq_printf(seq,
"%2td %-10s %8ld %7ld %8ld %7ld %05X\n",
vif - net->ipv6.vif6_table,
vif - mrt->vif6_table,
name, vif->bytes_in, vif->pkt_in,
vif->bytes_out, vif->pkt_out,
vif->flags);
......@@ -224,8 +474,15 @@ static const struct file_operations ip6mr_vif_fops = {
static void *ipmr_mfc_seq_start(struct seq_file *seq, loff_t *pos)
{
struct ipmr_mfc_iter *it = seq->private;
struct net *net = seq_file_net(seq);
struct mr6_table *mrt;
mrt = ip6mr_get_table(net, RT6_TABLE_DFLT);
if (mrt == NULL)
return ERR_PTR(-ENOENT);
it->mrt = mrt;
return *pos ? ipmr_mfc_seq_idx(net, seq->private, *pos - 1)
: SEQ_START_TOKEN;
}
......@@ -235,35 +492,36 @@ static void *ipmr_mfc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
struct mfc6_cache *mfc = v;
struct ipmr_mfc_iter *it = seq->private;
struct net *net = seq_file_net(seq);
struct mr6_table *mrt = it->mrt;
++*pos;
if (v == SEQ_START_TOKEN)
return ipmr_mfc_seq_idx(net, seq->private, 0);
if (mfc->next)
return mfc->next;
if (mfc->list.next != it->cache)
return list_entry(mfc->list.next, struct mfc6_cache, list);
if (it->cache == &mfc_unres_queue)
if (it->cache == &mrt->mfc6_unres_queue)
goto end_of_list;
BUG_ON(it->cache != net->ipv6.mfc6_cache_array);
BUG_ON(it->cache != &mrt->mfc6_cache_array[it->ct]);
while (++it->ct < MFC6_LINES) {
mfc = net->ipv6.mfc6_cache_array[it->ct];
if (mfc)
return mfc;
it->cache = &mrt->mfc6_cache_array[it->ct];
if (list_empty(it->cache))
continue;
return list_first_entry(it->cache, struct mfc6_cache, list);
}
/* exhausted cache_array, show unresolved */
read_unlock(&mrt_lock);
it->cache = &mfc_unres_queue;
it->cache = &mrt->mfc6_unres_queue;
it->ct = 0;
spin_lock_bh(&mfc_unres_lock);
mfc = mfc_unres_queue;
if (mfc)
return mfc;
if (!list_empty(it->cache))
return list_first_entry(it->cache, struct mfc6_cache, list);
end_of_list:
spin_unlock_bh(&mfc_unres_lock);
......@@ -275,18 +533,17 @@ static void *ipmr_mfc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
static void ipmr_mfc_seq_stop(struct seq_file *seq, void *v)
{
struct ipmr_mfc_iter *it = seq->private;
struct net *net = seq_file_net(seq);
struct mr6_table *mrt = it->mrt;
if (it->cache == &mfc_unres_queue)
if (it->cache == &mrt->mfc6_unres_queue)
spin_unlock_bh(&mfc_unres_lock);
else if (it->cache == net->ipv6.mfc6_cache_array)
else if (it->cache == mrt->mfc6_cache_array)
read_unlock(&mrt_lock);
}
static int ipmr_mfc_seq_show(struct seq_file *seq, void *v)
{
int n;
struct net *net = seq_file_net(seq);
if (v == SEQ_START_TOKEN) {
seq_puts(seq,
......@@ -296,19 +553,20 @@ static int ipmr_mfc_seq_show(struct seq_file *seq, void *v)
} else {
const struct mfc6_cache *mfc = v;
const struct ipmr_mfc_iter *it = seq->private;
struct mr6_table *mrt = it->mrt;
seq_printf(seq, "%pI6 %pI6 %-3hd",
&mfc->mf6c_mcastgrp, &mfc->mf6c_origin,
mfc->mf6c_parent);
if (it->cache != &mfc_unres_queue) {
if (it->cache != &mrt->mfc6_unres_queue) {
seq_printf(seq, " %8lu %8lu %8lu",
mfc->mfc_un.res.pkt,
mfc->mfc_un.res.bytes,
mfc->mfc_un.res.wrong_if);
for (n = mfc->mfc_un.res.minvif;
n < mfc->mfc_un.res.maxvif; n++) {
if (MIF_EXISTS(net, n) &&
if (MIF_EXISTS(mrt, n) &&
mfc->mfc_un.res.ttls[n] < 255)
seq_printf(seq,
" %2d:%-3d",
......@@ -355,7 +613,12 @@ static int pim6_rcv(struct sk_buff *skb)
struct ipv6hdr *encap;
struct net_device *reg_dev = NULL;
struct net *net = dev_net(skb->dev);
int reg_vif_num = net->ipv6.mroute_reg_vif_num;
struct mr6_table *mrt;
struct flowi fl = {
.iif = skb->dev->ifindex,
.mark = skb->mark,
};
int reg_vif_num;
if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(*encap)))
goto drop;
......@@ -378,9 +641,13 @@ static int pim6_rcv(struct sk_buff *skb)
ntohs(encap->payload_len) + sizeof(*pim) > skb->len)
goto drop;
if (ip6mr_fib_lookup(net, &fl, &mrt) < 0)
goto drop;
reg_vif_num = mrt->mroute_reg_vif_num;
read_lock(&mrt_lock);
if (reg_vif_num >= 0)
reg_dev = net->ipv6.vif6_table[reg_vif_num].dev;
reg_dev = mrt->vif6_table[reg_vif_num].dev;
if (reg_dev)
dev_hold(reg_dev);
read_unlock(&mrt_lock);
......@@ -417,12 +684,22 @@ static netdev_tx_t reg_vif_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct net *net = dev_net(dev);
struct mr6_table *mrt;
struct flowi fl = {
.oif = dev->ifindex,
.iif = skb->skb_iif,
.mark = skb->mark,
};
int err;
err = ip6mr_fib_lookup(net, &fl, &mrt);
if (err < 0)
return err;
read_lock(&mrt_lock);
dev->stats.tx_bytes += skb->len;
dev->stats.tx_packets++;
ip6mr_cache_report(net, skb, net->ipv6.mroute_reg_vif_num,
MRT6MSG_WHOLEPKT);
ip6mr_cache_report(mrt, skb, mrt->mroute_reg_vif_num, MRT6MSG_WHOLEPKT);
read_unlock(&mrt_lock);
kfree_skb(skb);
return NETDEV_TX_OK;
......@@ -442,11 +719,17 @@ static void reg_vif_setup(struct net_device *dev)
dev->features |= NETIF_F_NETNS_LOCAL;
}
static struct net_device *ip6mr_reg_vif(struct net *net)
static struct net_device *ip6mr_reg_vif(struct net *net, struct mr6_table *mrt)
{
struct net_device *dev;
char name[IFNAMSIZ];
dev = alloc_netdev(0, "pim6reg", reg_vif_setup);
if (mrt->id == RT6_TABLE_DFLT)
sprintf(name, "pim6reg");
else
sprintf(name, "pim6reg%u", mrt->id);
dev = alloc_netdev(0, name, reg_vif_setup);
if (dev == NULL)
return NULL;
......@@ -478,15 +761,16 @@ static struct net_device *ip6mr_reg_vif(struct net *net)
* Delete a VIF entry
*/
static int mif6_delete(struct net *net, int vifi, struct list_head *head)
static int mif6_delete(struct mr6_table *mrt, int vifi, struct list_head *head)
{
struct mif_device *v;
struct net_device *dev;
struct inet6_dev *in6_dev;
if (vifi < 0 || vifi >= net->ipv6.maxvif)
if (vifi < 0 || vifi >= mrt->maxvif)
return -EADDRNOTAVAIL;
v = &net->ipv6.vif6_table[vifi];
v = &mrt->vif6_table[vifi];
write_lock_bh(&mrt_lock);
dev = v->dev;
......@@ -498,17 +782,17 @@ static int mif6_delete(struct net *net, int vifi, struct list_head *head)
}
#ifdef CONFIG_IPV6_PIMSM_V2
if (vifi == net->ipv6.mroute_reg_vif_num)
net->ipv6.mroute_reg_vif_num = -1;
if (vifi == mrt->mroute_reg_vif_num)
mrt->mroute_reg_vif_num = -1;
#endif
if (vifi + 1 == net->ipv6.maxvif) {
if (vifi + 1 == mrt->maxvif) {
int tmp;
for (tmp = vifi - 1; tmp >= 0; tmp--) {
if (MIF_EXISTS(net, tmp))
if (MIF_EXISTS(mrt, tmp))
break;
}
net->ipv6.maxvif = tmp + 1;
mrt->maxvif = tmp + 1;
}
write_unlock_bh(&mrt_lock);
......@@ -528,7 +812,6 @@ static int mif6_delete(struct net *net, int vifi, struct list_head *head)
static inline void ip6mr_cache_free(struct mfc6_cache *c)
{
release_net(mfc6_net(c));
kmem_cache_free(mrt_cachep, c);
}
......@@ -536,12 +819,12 @@ static inline void ip6mr_cache_free(struct mfc6_cache *c)
and reporting error to netlink readers.
*/
static void ip6mr_destroy_unres(struct mfc6_cache *c)
static void ip6mr_destroy_unres(struct mr6_table *mrt, struct mfc6_cache *c)
{
struct net *net = read_pnet(&mrt->net);
struct sk_buff *skb;
struct net *net = mfc6_net(c);
atomic_dec(&net->ipv6.cache_resolve_queue_len);
atomic_dec(&mrt->cache_resolve_queue_len);
while((skb = skb_dequeue(&c->mfc_un.unres.unresolved)) != NULL) {
if (ipv6_hdr(skb)->version == 0) {
......@@ -559,60 +842,59 @@ static void ip6mr_destroy_unres(struct mfc6_cache *c)
}
/* Single timer process for all the unresolved queue. */
/* Timer process for all the unresolved queue. */
static void ipmr_do_expire_process(unsigned long dummy)
static void ipmr_do_expire_process(struct mr6_table *mrt)
{
unsigned long now = jiffies;
unsigned long expires = 10 * HZ;
struct mfc6_cache *c, **cp;
struct mfc6_cache *c, *next;
cp = &mfc_unres_queue;
while ((c = *cp) != NULL) {
list_for_each_entry_safe(c, next, &mrt->mfc6_unres_queue, list) {
if (time_after(c->mfc_un.unres.expires, now)) {
/* not yet... */
unsigned long interval = c->mfc_un.unres.expires - now;
if (interval < expires)
expires = interval;
cp = &c->next;
continue;
}
*cp = c->next;
ip6mr_destroy_unres(c);
list_del(&c->list);
ip6mr_destroy_unres(mrt, c);
}
if (mfc_unres_queue != NULL)
mod_timer(&ipmr_expire_timer, jiffies + expires);
if (!list_empty(&mrt->mfc6_unres_queue))
mod_timer(&mrt->ipmr_expire_timer, jiffies + expires);
}
static void ipmr_expire_process(unsigned long dummy)
static void ipmr_expire_process(unsigned long arg)
{
struct mr6_table *mrt = (struct mr6_table *)arg;
if (!spin_trylock(&mfc_unres_lock)) {
mod_timer(&ipmr_expire_timer, jiffies + 1);
mod_timer(&mrt->ipmr_expire_timer, jiffies + 1);
return;
}
if (mfc_unres_queue != NULL)
ipmr_do_expire_process(dummy);
if (!list_empty(&mrt->mfc6_unres_queue))
ipmr_do_expire_process(mrt);
spin_unlock(&mfc_unres_lock);
}
/* Fill oifs list. It is called under write locked mrt_lock. */
static void ip6mr_update_thresholds(struct mfc6_cache *cache, unsigned char *ttls)
static void ip6mr_update_thresholds(struct mr6_table *mrt, struct mfc6_cache *cache,
unsigned char *ttls)
{
int vifi;
struct net *net = mfc6_net(cache);
cache->mfc_un.res.minvif = MAXMIFS;
cache->mfc_un.res.maxvif = 0;
memset(cache->mfc_un.res.ttls, 255, MAXMIFS);
for (vifi = 0; vifi < net->ipv6.maxvif; vifi++) {
if (MIF_EXISTS(net, vifi) &&
for (vifi = 0; vifi < mrt->maxvif; vifi++) {
if (MIF_EXISTS(mrt, vifi) &&
ttls[vifi] && ttls[vifi] < 255) {
cache->mfc_un.res.ttls[vifi] = ttls[vifi];
if (cache->mfc_un.res.minvif > vifi)
......@@ -623,16 +905,17 @@ static void ip6mr_update_thresholds(struct mfc6_cache *cache, unsigned char *ttl
}
}
static int mif6_add(struct net *net, struct mif6ctl *vifc, int mrtsock)
static int mif6_add(struct net *net, struct mr6_table *mrt,
struct mif6ctl *vifc, int mrtsock)
{
int vifi = vifc->mif6c_mifi;
struct mif_device *v = &net->ipv6.vif6_table[vifi];
struct mif_device *v = &mrt->vif6_table[vifi];
struct net_device *dev;
struct inet6_dev *in6_dev;
int err;
/* Is vif busy ? */
if (MIF_EXISTS(net, vifi))
if (MIF_EXISTS(mrt, vifi))
return -EADDRINUSE;
switch (vifc->mif6c_flags) {
......@@ -642,9 +925,9 @@ static int mif6_add(struct net *net, struct mif6ctl *vifc, int mrtsock)
* Special Purpose VIF in PIM
* All the packets will be sent to the daemon
*/
if (net->ipv6.mroute_reg_vif_num >= 0)
if (mrt->mroute_reg_vif_num >= 0)
return -EADDRINUSE;
dev = ip6mr_reg_vif(net);
dev = ip6mr_reg_vif(net, mrt);
if (!dev)
return -ENOBUFS;
err = dev_set_allmulti(dev, 1);
......@@ -694,50 +977,48 @@ static int mif6_add(struct net *net, struct mif6ctl *vifc, int mrtsock)
v->dev = dev;
#ifdef CONFIG_IPV6_PIMSM_V2
if (v->flags & MIFF_REGISTER)
net->ipv6.mroute_reg_vif_num = vifi;
mrt->mroute_reg_vif_num = vifi;
#endif
if (vifi + 1 > net->ipv6.maxvif)
net->ipv6.maxvif = vifi + 1;
if (vifi + 1 > mrt->maxvif)
mrt->maxvif = vifi + 1;
write_unlock_bh(&mrt_lock);
return 0;
}
static struct mfc6_cache *ip6mr_cache_find(struct net *net,
static struct mfc6_cache *ip6mr_cache_find(struct mr6_table *mrt,
struct in6_addr *origin,
struct in6_addr *mcastgrp)
{
int line = MFC6_HASH(mcastgrp, origin);
struct mfc6_cache *c;
for (c = net->ipv6.mfc6_cache_array[line]; c; c = c->next) {
list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) {
if (ipv6_addr_equal(&c->mf6c_origin, origin) &&
ipv6_addr_equal(&c->mf6c_mcastgrp, mcastgrp))
break;
return c;
}
return c;
return NULL;
}
/*
* Allocate a multicast cache entry
*/
static struct mfc6_cache *ip6mr_cache_alloc(struct net *net)
static struct mfc6_cache *ip6mr_cache_alloc(void)
{
struct mfc6_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_KERNEL);
if (c == NULL)
return NULL;
c->mfc_un.res.minvif = MAXMIFS;
mfc6_net_set(c, net);
return c;
}
static struct mfc6_cache *ip6mr_cache_alloc_unres(struct net *net)
static struct mfc6_cache *ip6mr_cache_alloc_unres(void)
{
struct mfc6_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_ATOMIC);
if (c == NULL)
return NULL;
skb_queue_head_init(&c->mfc_un.unres.unresolved);
c->mfc_un.unres.expires = jiffies + 10 * HZ;
mfc6_net_set(c, net);
return c;
}
......@@ -745,7 +1026,8 @@ static struct mfc6_cache *ip6mr_cache_alloc_unres(struct net *net)
* A cache entry has gone into a resolved state from queued
*/
static void ip6mr_cache_resolve(struct mfc6_cache *uc, struct mfc6_cache *c)
static void ip6mr_cache_resolve(struct net *net, struct mr6_table *mrt,
struct mfc6_cache *uc, struct mfc6_cache *c)
{
struct sk_buff *skb;
......@@ -758,7 +1040,7 @@ static void ip6mr_cache_resolve(struct mfc6_cache *uc, struct mfc6_cache *c)
int err;
struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct ipv6hdr));
if (ip6mr_fill_mroute(skb, c, NLMSG_DATA(nlh)) > 0) {
if (__ip6mr_fill_mroute(mrt, skb, c, NLMSG_DATA(nlh)) > 0) {
nlh->nlmsg_len = skb_tail_pointer(skb) - (u8 *)nlh;
} else {
nlh->nlmsg_type = NLMSG_ERROR;
......@@ -766,9 +1048,9 @@ static void ip6mr_cache_resolve(struct mfc6_cache *uc, struct mfc6_cache *c)
skb_trim(skb, nlh->nlmsg_len);
((struct nlmsgerr *)NLMSG_DATA(nlh))->error = -EMSGSIZE;
}
err = rtnl_unicast(skb, mfc6_net(uc), NETLINK_CB(skb).pid);
err = rtnl_unicast(skb, net, NETLINK_CB(skb).pid);
} else
ip6_mr_forward(skb, c);
ip6_mr_forward(net, mrt, skb, c);
}
}
......@@ -779,8 +1061,8 @@ static void ip6mr_cache_resolve(struct mfc6_cache *uc, struct mfc6_cache *c)
* Called under mrt_lock.
*/
static int ip6mr_cache_report(struct net *net, struct sk_buff *pkt, mifi_t mifi,
int assert)
static int ip6mr_cache_report(struct mr6_table *mrt, struct sk_buff *pkt,
mifi_t mifi, int assert)
{
struct sk_buff *skb;
struct mrt6msg *msg;
......@@ -816,7 +1098,7 @@ static int ip6mr_cache_report(struct net *net, struct sk_buff *pkt, mifi_t mifi,
msg = (struct mrt6msg *)skb_transport_header(skb);
msg->im6_mbz = 0;
msg->im6_msgtype = MRT6MSG_WHOLEPKT;
msg->im6_mif = net->ipv6.mroute_reg_vif_num;
msg->im6_mif = mrt->mroute_reg_vif_num;
msg->im6_pad = 0;
ipv6_addr_copy(&msg->im6_src, &ipv6_hdr(pkt)->saddr);
ipv6_addr_copy(&msg->im6_dst, &ipv6_hdr(pkt)->daddr);
......@@ -851,7 +1133,7 @@ static int ip6mr_cache_report(struct net *net, struct sk_buff *pkt, mifi_t mifi,
skb->ip_summed = CHECKSUM_UNNECESSARY;
}
if (net->ipv6.mroute6_sk == NULL) {
if (mrt->mroute6_sk == NULL) {
kfree_skb(skb);
return -EINVAL;
}
......@@ -859,7 +1141,7 @@ static int ip6mr_cache_report(struct net *net, struct sk_buff *pkt, mifi_t mifi,
/*
* Deliver to user space multicast routing algorithms
*/
ret = sock_queue_rcv_skb(net->ipv6.mroute6_sk, skb);
ret = sock_queue_rcv_skb(mrt->mroute6_sk, skb);
if (ret < 0) {
if (net_ratelimit())
printk(KERN_WARNING "mroute6: pending queue full, dropping entries.\n");
......@@ -874,26 +1156,28 @@ static int ip6mr_cache_report(struct net *net, struct sk_buff *pkt, mifi_t mifi,
*/
static int
ip6mr_cache_unresolved(struct net *net, mifi_t mifi, struct sk_buff *skb)
ip6mr_cache_unresolved(struct mr6_table *mrt, mifi_t mifi, struct sk_buff *skb)
{
bool found = false;
int err;
struct mfc6_cache *c;
spin_lock_bh(&mfc_unres_lock);
for (c = mfc_unres_queue; c; c = c->next) {
if (net_eq(mfc6_net(c), net) &&
ipv6_addr_equal(&c->mf6c_mcastgrp, &ipv6_hdr(skb)->daddr) &&
ipv6_addr_equal(&c->mf6c_origin, &ipv6_hdr(skb)->saddr))
list_for_each_entry(c, &mrt->mfc6_unres_queue, list) {
if (ipv6_addr_equal(&c->mf6c_mcastgrp, &ipv6_hdr(skb)->daddr) &&
ipv6_addr_equal(&c->mf6c_origin, &ipv6_hdr(skb)->saddr)) {
found = true;
break;
}
}
if (c == NULL) {
if (!found) {
/*
* Create a new entry if allowable
*/
if (atomic_read(&net->ipv6.cache_resolve_queue_len) >= 10 ||
(c = ip6mr_cache_alloc_unres(net)) == NULL) {
if (atomic_read(&mrt->cache_resolve_queue_len) >= 10 ||
(c = ip6mr_cache_alloc_unres()) == NULL) {
spin_unlock_bh(&mfc_unres_lock);
kfree_skb(skb);
......@@ -910,7 +1194,7 @@ ip6mr_cache_unresolved(struct net *net, mifi_t mifi, struct sk_buff *skb)
/*
* Reflect first query at pim6sd
*/
err = ip6mr_cache_report(net, skb, mifi, MRT6MSG_NOCACHE);
err = ip6mr_cache_report(mrt, skb, mifi, MRT6MSG_NOCACHE);
if (err < 0) {
/* If the report failed throw the cache entry
out - Brad Parker
......@@ -922,11 +1206,10 @@ ip6mr_cache_unresolved(struct net *net, mifi_t mifi, struct sk_buff *skb)
return err;
}
atomic_inc(&net->ipv6.cache_resolve_queue_len);
c->next = mfc_unres_queue;
mfc_unres_queue = c;
atomic_inc(&mrt->cache_resolve_queue_len);
list_add(&c->list, &mrt->mfc6_unres_queue);
ipmr_do_expire_process(1);
ipmr_do_expire_process(mrt);
}
/*
......@@ -948,19 +1231,18 @@ ip6mr_cache_unresolved(struct net *net, mifi_t mifi, struct sk_buff *skb)
* MFC6 cache manipulation by user space
*/
static int ip6mr_mfc_delete(struct net *net, struct mf6cctl *mfc)
static int ip6mr_mfc_delete(struct mr6_table *mrt, struct mf6cctl *mfc)
{
int line;
struct mfc6_cache *c, **cp;
struct mfc6_cache *c, *next;
line = MFC6_HASH(&mfc->mf6cc_mcastgrp.sin6_addr, &mfc->mf6cc_origin.sin6_addr);
for (cp = &net->ipv6.mfc6_cache_array[line];
(c = *cp) != NULL; cp = &c->next) {
list_for_each_entry_safe(c, next, &mrt->mfc6_cache_array[line], list) {
if (ipv6_addr_equal(&c->mf6c_origin, &mfc->mf6cc_origin.sin6_addr) &&
ipv6_addr_equal(&c->mf6c_mcastgrp, &mfc->mf6cc_mcastgrp.sin6_addr)) {
write_lock_bh(&mrt_lock);
*cp = c->next;
list_del(&c->list);
write_unlock_bh(&mrt_lock);
ip6mr_cache_free(c);
......@@ -975,6 +1257,7 @@ static int ip6mr_device_event(struct notifier_block *this,
{
struct net_device *dev = ptr;
struct net *net = dev_net(dev);
struct mr6_table *mrt;
struct mif_device *v;
int ct;
LIST_HEAD(list);
......@@ -982,10 +1265,12 @@ static int ip6mr_device_event(struct notifier_block *this,
if (event != NETDEV_UNREGISTER)
return NOTIFY_DONE;
v = &net->ipv6.vif6_table[0];
for (ct = 0; ct < net->ipv6.maxvif; ct++, v++) {
if (v->dev == dev)
mif6_delete(net, ct, &list);
ip6mr_for_each_table(mrt, net) {
v = &mrt->vif6_table[0];
for (ct = 0; ct < mrt->maxvif; ct++, v++) {
if (v->dev == dev)
mif6_delete(mrt, ct, &list);
}
}
unregister_netdevice_many(&list);
......@@ -1002,26 +1287,11 @@ static struct notifier_block ip6_mr_notifier = {
static int __net_init ip6mr_net_init(struct net *net)
{
int err = 0;
net->ipv6.vif6_table = kcalloc(MAXMIFS, sizeof(struct mif_device),
GFP_KERNEL);
if (!net->ipv6.vif6_table) {
err = -ENOMEM;
goto fail;
}
/* Forwarding cache */
net->ipv6.mfc6_cache_array = kcalloc(MFC6_LINES,
sizeof(struct mfc6_cache *),
GFP_KERNEL);
if (!net->ipv6.mfc6_cache_array) {
err = -ENOMEM;
goto fail_mfc6_cache;
}
int err;
#ifdef CONFIG_IPV6_PIMSM_V2
net->ipv6.mroute_reg_vif_num = -1;
#endif
err = ip6mr_rules_init(net);
if (err < 0)
goto fail;
#ifdef CONFIG_PROC_FS
err = -ENOMEM;
......@@ -1030,16 +1300,15 @@ static int __net_init ip6mr_net_init(struct net *net)
if (!proc_net_fops_create(net, "ip6_mr_cache", 0, &ip6mr_mfc_fops))
goto proc_cache_fail;
#endif
return 0;
#ifdef CONFIG_PROC_FS
proc_cache_fail:
proc_net_remove(net, "ip6_mr_vif");
proc_vif_fail:
kfree(net->ipv6.mfc6_cache_array);
ip6mr_rules_exit(net);
#endif
fail_mfc6_cache:
kfree(net->ipv6.vif6_table);
fail:
return err;
}
......@@ -1050,9 +1319,7 @@ static void __net_exit ip6mr_net_exit(struct net *net)
proc_net_remove(net, "ip6_mr_cache");
proc_net_remove(net, "ip6_mr_vif");
#endif
mroute_clean_tables(net);
kfree(net->ipv6.mfc6_cache_array);
kfree(net->ipv6.vif6_table);
ip6mr_rules_exit(net);
}
static struct pernet_operations ip6mr_net_ops = {
......@@ -1075,7 +1342,6 @@ int __init ip6_mr_init(void)
if (err)
goto reg_pernet_fail;
setup_timer(&ipmr_expire_timer, ipmr_expire_process, 0);
err = register_netdevice_notifier(&ip6_mr_notifier);
if (err)
goto reg_notif_fail;
......@@ -1086,13 +1352,13 @@ int __init ip6_mr_init(void)
goto add_proto_fail;
}
#endif
rtnl_register(RTNL_FAMILY_IP6MR, RTM_GETROUTE, NULL, ip6mr_rtm_dumproute);
return 0;
#ifdef CONFIG_IPV6_PIMSM_V2
add_proto_fail:
unregister_netdevice_notifier(&ip6_mr_notifier);
#endif
reg_notif_fail:
del_timer(&ipmr_expire_timer);
unregister_pernet_subsys(&ip6mr_net_ops);
reg_pernet_fail:
kmem_cache_destroy(mrt_cachep);
......@@ -1102,15 +1368,16 @@ int __init ip6_mr_init(void)
void ip6_mr_cleanup(void)
{
unregister_netdevice_notifier(&ip6_mr_notifier);
del_timer(&ipmr_expire_timer);
unregister_pernet_subsys(&ip6mr_net_ops);
kmem_cache_destroy(mrt_cachep);
}
static int ip6mr_mfc_add(struct net *net, struct mf6cctl *mfc, int mrtsock)
static int ip6mr_mfc_add(struct net *net, struct mr6_table *mrt,
struct mf6cctl *mfc, int mrtsock)
{
bool found = false;
int line;
struct mfc6_cache *uc, *c, **cp;
struct mfc6_cache *uc, *c;
unsigned char ttls[MAXMIFS];
int i;
......@@ -1126,17 +1393,18 @@ static int ip6mr_mfc_add(struct net *net, struct mf6cctl *mfc, int mrtsock)
line = MFC6_HASH(&mfc->mf6cc_mcastgrp.sin6_addr, &mfc->mf6cc_origin.sin6_addr);
for (cp = &net->ipv6.mfc6_cache_array[line];
(c = *cp) != NULL; cp = &c->next) {
list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) {
if (ipv6_addr_equal(&c->mf6c_origin, &mfc->mf6cc_origin.sin6_addr) &&
ipv6_addr_equal(&c->mf6c_mcastgrp, &mfc->mf6cc_mcastgrp.sin6_addr))
ipv6_addr_equal(&c->mf6c_mcastgrp, &mfc->mf6cc_mcastgrp.sin6_addr)) {
found = true;
break;
}
}
if (c != NULL) {
if (found) {
write_lock_bh(&mrt_lock);
c->mf6c_parent = mfc->mf6cc_parent;
ip6mr_update_thresholds(c, ttls);
ip6mr_update_thresholds(mrt, c, ttls);
if (!mrtsock)
c->mfc_flags |= MFC_STATIC;
write_unlock_bh(&mrt_lock);
......@@ -1146,43 +1414,42 @@ static int ip6mr_mfc_add(struct net *net, struct mf6cctl *mfc, int mrtsock)
if (!ipv6_addr_is_multicast(&mfc->mf6cc_mcastgrp.sin6_addr))
return -EINVAL;
c = ip6mr_cache_alloc(net);
c = ip6mr_cache_alloc();
if (c == NULL)
return -ENOMEM;
c->mf6c_origin = mfc->mf6cc_origin.sin6_addr;
c->mf6c_mcastgrp = mfc->mf6cc_mcastgrp.sin6_addr;
c->mf6c_parent = mfc->mf6cc_parent;
ip6mr_update_thresholds(c, ttls);
ip6mr_update_thresholds(mrt, c, ttls);
if (!mrtsock)
c->mfc_flags |= MFC_STATIC;
write_lock_bh(&mrt_lock);
c->next = net->ipv6.mfc6_cache_array[line];
net->ipv6.mfc6_cache_array[line] = c;
list_add(&c->list, &mrt->mfc6_cache_array[line]);
write_unlock_bh(&mrt_lock);
/*
* Check to see if we resolved a queued list. If so we
* need to send on the frames and tidy up.
*/
found = false;
spin_lock_bh(&mfc_unres_lock);
for (cp = &mfc_unres_queue; (uc = *cp) != NULL;
cp = &uc->next) {
if (net_eq(mfc6_net(uc), net) &&
ipv6_addr_equal(&uc->mf6c_origin, &c->mf6c_origin) &&
list_for_each_entry(uc, &mrt->mfc6_unres_queue, list) {
if (ipv6_addr_equal(&uc->mf6c_origin, &c->mf6c_origin) &&
ipv6_addr_equal(&uc->mf6c_mcastgrp, &c->mf6c_mcastgrp)) {
*cp = uc->next;
atomic_dec(&net->ipv6.cache_resolve_queue_len);
list_del(&uc->list);
atomic_dec(&mrt->cache_resolve_queue_len);
found = true;
break;
}
}
if (mfc_unres_queue == NULL)
del_timer(&ipmr_expire_timer);
if (list_empty(&mrt->mfc6_unres_queue))
del_timer(&mrt->ipmr_expire_timer);
spin_unlock_bh(&mfc_unres_lock);
if (uc) {
ip6mr_cache_resolve(uc, c);
if (found) {
ip6mr_cache_resolve(net, mrt, uc, c);
ip6mr_cache_free(uc);
}
return 0;
......@@ -1192,17 +1459,18 @@ static int ip6mr_mfc_add(struct net *net, struct mf6cctl *mfc, int mrtsock)
* Close the multicast socket, and clear the vif tables etc
*/
static void mroute_clean_tables(struct net *net)
static void mroute_clean_tables(struct mr6_table *mrt)
{
int i;
LIST_HEAD(list);
struct mfc6_cache *c, *next;
/*
* Shut down all active vif entries
*/
for (i = 0; i < net->ipv6.maxvif; i++) {
if (!(net->ipv6.vif6_table[i].flags & VIFF_STATIC))
mif6_delete(net, i, &list);
for (i = 0; i < mrt->maxvif; i++) {
if (!(mrt->vif6_table[i].flags & VIFF_STATIC))
mif6_delete(mrt, i, &list);
}
unregister_netdevice_many(&list);
......@@ -1210,48 +1478,36 @@ static void mroute_clean_tables(struct net *net)
* Wipe the cache
*/
for (i = 0; i < MFC6_LINES; i++) {
struct mfc6_cache *c, **cp;
cp = &net->ipv6.mfc6_cache_array[i];
while ((c = *cp) != NULL) {
if (c->mfc_flags & MFC_STATIC) {
cp = &c->next;
list_for_each_entry_safe(c, next, &mrt->mfc6_cache_array[i], list) {
if (c->mfc_flags & MFC_STATIC)
continue;
}
write_lock_bh(&mrt_lock);
*cp = c->next;
list_del(&c->list);
write_unlock_bh(&mrt_lock);
ip6mr_cache_free(c);
}
}
if (atomic_read(&net->ipv6.cache_resolve_queue_len) != 0) {
struct mfc6_cache *c, **cp;
if (atomic_read(&mrt->cache_resolve_queue_len) != 0) {
spin_lock_bh(&mfc_unres_lock);
cp = &mfc_unres_queue;
while ((c = *cp) != NULL) {
if (!net_eq(mfc6_net(c), net)) {
cp = &c->next;
continue;
}
*cp = c->next;
ip6mr_destroy_unres(c);
list_for_each_entry_safe(c, next, &mrt->mfc6_unres_queue, list) {
list_del(&c->list);
ip6mr_destroy_unres(mrt, c);
}
spin_unlock_bh(&mfc_unres_lock);
}
}
static int ip6mr_sk_init(struct sock *sk)
static int ip6mr_sk_init(struct mr6_table *mrt, struct sock *sk)
{
int err = 0;
struct net *net = sock_net(sk);
rtnl_lock();
write_lock_bh(&mrt_lock);
if (likely(net->ipv6.mroute6_sk == NULL)) {
net->ipv6.mroute6_sk = sk;
if (likely(mrt->mroute6_sk == NULL)) {
mrt->mroute6_sk = sk;
net->ipv6.devconf_all->mc_forwarding++;
}
else
......@@ -1265,24 +1521,43 @@ static int ip6mr_sk_init(struct sock *sk)
int ip6mr_sk_done(struct sock *sk)
{
int err = 0;
int err = -EACCES;
struct net *net = sock_net(sk);
struct mr6_table *mrt;
rtnl_lock();
if (sk == net->ipv6.mroute6_sk) {
write_lock_bh(&mrt_lock);
net->ipv6.mroute6_sk = NULL;
net->ipv6.devconf_all->mc_forwarding--;
write_unlock_bh(&mrt_lock);
ip6mr_for_each_table(mrt, net) {
if (sk == mrt->mroute6_sk) {
write_lock_bh(&mrt_lock);
mrt->mroute6_sk = NULL;
net->ipv6.devconf_all->mc_forwarding--;
write_unlock_bh(&mrt_lock);
mroute_clean_tables(net);
} else
err = -EACCES;
mroute_clean_tables(mrt);
err = 0;
break;
}
}
rtnl_unlock();
return err;
}
struct sock *mroute6_socket(struct net *net, struct sk_buff *skb)
{
struct mr6_table *mrt;
struct flowi fl = {
.iif = skb->skb_iif,
.oif = skb->dev->ifindex,
.mark = skb->mark,
};
if (ip6mr_fib_lookup(net, &fl, &mrt) < 0)
return NULL;
return mrt->mroute6_sk;
}
/*
* Socket options and virtual interface manipulation. The whole
* virtual interface system is a complete heap, but unfortunately
......@@ -1297,9 +1572,14 @@ int ip6_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, uns
struct mf6cctl mfc;
mifi_t mifi;
struct net *net = sock_net(sk);
struct mr6_table *mrt;
mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT);
if (mrt == NULL)
return -ENOENT;
if (optname != MRT6_INIT) {
if (sk != net->ipv6.mroute6_sk && !capable(CAP_NET_ADMIN))
if (sk != mrt->mroute6_sk && !capable(CAP_NET_ADMIN))
return -EACCES;
}
......@@ -1311,7 +1591,7 @@ int ip6_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, uns
if (optlen < sizeof(int))
return -EINVAL;
return ip6mr_sk_init(sk);
return ip6mr_sk_init(mrt, sk);
case MRT6_DONE:
return ip6mr_sk_done(sk);
......@@ -1324,7 +1604,7 @@ int ip6_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, uns
if (vif.mif6c_mifi >= MAXMIFS)
return -ENFILE;
rtnl_lock();
ret = mif6_add(net, &vif, sk == net->ipv6.mroute6_sk);
ret = mif6_add(net, mrt, &vif, sk == mrt->mroute6_sk);
rtnl_unlock();
return ret;
......@@ -1334,7 +1614,7 @@ int ip6_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, uns
if (copy_from_user(&mifi, optval, sizeof(mifi_t)))
return -EFAULT;
rtnl_lock();
ret = mif6_delete(net, mifi, NULL);
ret = mif6_delete(mrt, mifi, NULL);
rtnl_unlock();
return ret;
......@@ -1350,10 +1630,9 @@ int ip6_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, uns
return -EFAULT;
rtnl_lock();
if (optname == MRT6_DEL_MFC)
ret = ip6mr_mfc_delete(net, &mfc);
ret = ip6mr_mfc_delete(mrt, &mfc);
else
ret = ip6mr_mfc_add(net, &mfc,
sk == net->ipv6.mroute6_sk);
ret = ip6mr_mfc_add(net, mrt, &mfc, sk == mrt->mroute6_sk);
rtnl_unlock();
return ret;
......@@ -1365,7 +1644,7 @@ int ip6_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, uns
int v;
if (get_user(v, (int __user *)optval))
return -EFAULT;
net->ipv6.mroute_do_assert = !!v;
mrt->mroute_do_assert = !!v;
return 0;
}
......@@ -1378,14 +1657,35 @@ int ip6_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, uns
v = !!v;
rtnl_lock();
ret = 0;
if (v != net->ipv6.mroute_do_pim) {
net->ipv6.mroute_do_pim = v;
net->ipv6.mroute_do_assert = v;
if (v != mrt->mroute_do_pim) {
mrt->mroute_do_pim = v;
mrt->mroute_do_assert = v;
}
rtnl_unlock();
return ret;
}
#endif
#ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES
case MRT6_TABLE:
{
u32 v;
if (optlen != sizeof(u32))
return -EINVAL;
if (get_user(v, (u32 __user *)optval))
return -EFAULT;
if (sk == mrt->mroute6_sk)
return -EBUSY;
rtnl_lock();
ret = 0;
if (!ip6mr_new_table(net, v))
ret = -ENOMEM;
raw6_sk(sk)->ip6mr_table = v;
rtnl_unlock();
return ret;
}
#endif
/*
* Spurious command, or MRT6_VERSION which you cannot
......@@ -1406,6 +1706,11 @@ int ip6_mroute_getsockopt(struct sock *sk, int optname, char __user *optval,
int olr;
int val;
struct net *net = sock_net(sk);
struct mr6_table *mrt;
mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT);
if (mrt == NULL)
return -ENOENT;
switch (optname) {
case MRT6_VERSION:
......@@ -1413,11 +1718,11 @@ int ip6_mroute_getsockopt(struct sock *sk, int optname, char __user *optval,
break;
#ifdef CONFIG_IPV6_PIMSM_V2
case MRT6_PIM:
val = net->ipv6.mroute_do_pim;
val = mrt->mroute_do_pim;
break;
#endif
case MRT6_ASSERT:
val = net->ipv6.mroute_do_assert;
val = mrt->mroute_do_assert;
break;
default:
return -ENOPROTOOPT;
......@@ -1448,16 +1753,21 @@ int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg)
struct mif_device *vif;
struct mfc6_cache *c;
struct net *net = sock_net(sk);
struct mr6_table *mrt;
mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT);
if (mrt == NULL)
return -ENOENT;
switch (cmd) {
case SIOCGETMIFCNT_IN6:
if (copy_from_user(&vr, arg, sizeof(vr)))
return -EFAULT;
if (vr.mifi >= net->ipv6.maxvif)
if (vr.mifi >= mrt->maxvif)
return -EINVAL;
read_lock(&mrt_lock);
vif = &net->ipv6.vif6_table[vr.mifi];
if (MIF_EXISTS(net, vr.mifi)) {
vif = &mrt->vif6_table[vr.mifi];
if (MIF_EXISTS(mrt, vr.mifi)) {
vr.icount = vif->pkt_in;
vr.ocount = vif->pkt_out;
vr.ibytes = vif->bytes_in;
......@@ -1475,7 +1785,7 @@ int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg)
return -EFAULT;
read_lock(&mrt_lock);
c = ip6mr_cache_find(net, &sr.src.sin6_addr, &sr.grp.sin6_addr);
c = ip6mr_cache_find(mrt, &sr.src.sin6_addr, &sr.grp.sin6_addr);
if (c) {
sr.pktcnt = c->mfc_un.res.pkt;
sr.bytecnt = c->mfc_un.res.bytes;
......@@ -1505,11 +1815,11 @@ static inline int ip6mr_forward2_finish(struct sk_buff *skb)
* Processing handlers for ip6mr_forward
*/
static int ip6mr_forward2(struct sk_buff *skb, struct mfc6_cache *c, int vifi)
static int ip6mr_forward2(struct net *net, struct mr6_table *mrt,
struct sk_buff *skb, struct mfc6_cache *c, int vifi)
{
struct ipv6hdr *ipv6h;
struct net *net = mfc6_net(c);
struct mif_device *vif = &net->ipv6.vif6_table[vifi];
struct mif_device *vif = &mrt->vif6_table[vifi];
struct net_device *dev;
struct dst_entry *dst;
struct flowi fl;
......@@ -1523,7 +1833,7 @@ static int ip6mr_forward2(struct sk_buff *skb, struct mfc6_cache *c, int vifi)
vif->bytes_out += skb->len;
vif->dev->stats.tx_bytes += skb->len;
vif->dev->stats.tx_packets++;
ip6mr_cache_report(net, skb, vifi, MRT6MSG_WHOLEPKT);
ip6mr_cache_report(mrt, skb, vifi, MRT6MSG_WHOLEPKT);
goto out_free;
}
#endif
......@@ -1578,22 +1888,22 @@ static int ip6mr_forward2(struct sk_buff *skb, struct mfc6_cache *c, int vifi)
return 0;
}
static int ip6mr_find_vif(struct net_device *dev)
static int ip6mr_find_vif(struct mr6_table *mrt, struct net_device *dev)
{
struct net *net = dev_net(dev);
int ct;
for (ct = net->ipv6.maxvif - 1; ct >= 0; ct--) {
if (net->ipv6.vif6_table[ct].dev == dev)
for (ct = mrt->maxvif - 1; ct >= 0; ct--) {
if (mrt->vif6_table[ct].dev == dev)
break;
}
return ct;
}
static int ip6_mr_forward(struct sk_buff *skb, struct mfc6_cache *cache)
static int ip6_mr_forward(struct net *net, struct mr6_table *mrt,
struct sk_buff *skb, struct mfc6_cache *cache)
{
int psend = -1;
int vif, ct;
struct net *net = mfc6_net(cache);
vif = cache->mf6c_parent;
cache->mfc_un.res.pkt++;
......@@ -1602,30 +1912,30 @@ static int ip6_mr_forward(struct sk_buff *skb, struct mfc6_cache *cache)
/*
* Wrong interface: drop packet and (maybe) send PIM assert.
*/
if (net->ipv6.vif6_table[vif].dev != skb->dev) {
if (mrt->vif6_table[vif].dev != skb->dev) {
int true_vifi;
cache->mfc_un.res.wrong_if++;
true_vifi = ip6mr_find_vif(skb->dev);
true_vifi = ip6mr_find_vif(mrt, skb->dev);
if (true_vifi >= 0 && net->ipv6.mroute_do_assert &&
if (true_vifi >= 0 && mrt->mroute_do_assert &&
/* pimsm uses asserts, when switching from RPT to SPT,
so that we cannot check that packet arrived on an oif.
It is bad, but otherwise we would need to move pretty
large chunk of pimd to kernel. Ough... --ANK
*/
(net->ipv6.mroute_do_pim ||
(mrt->mroute_do_pim ||
cache->mfc_un.res.ttls[true_vifi] < 255) &&
time_after(jiffies,
cache->mfc_un.res.last_assert + MFC_ASSERT_THRESH)) {
cache->mfc_un.res.last_assert = jiffies;
ip6mr_cache_report(net, skb, true_vifi, MRT6MSG_WRONGMIF);
ip6mr_cache_report(mrt, skb, true_vifi, MRT6MSG_WRONGMIF);
}
goto dont_forward;
}
net->ipv6.vif6_table[vif].pkt_in++;
net->ipv6.vif6_table[vif].bytes_in += skb->len;
mrt->vif6_table[vif].pkt_in++;
mrt->vif6_table[vif].bytes_in += skb->len;
/*
* Forward the frame
......@@ -1635,13 +1945,13 @@ static int ip6_mr_forward(struct sk_buff *skb, struct mfc6_cache *cache)
if (psend != -1) {
struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
if (skb2)
ip6mr_forward2(skb2, cache, psend);
ip6mr_forward2(net, mrt, skb2, cache, psend);
}
psend = ct;
}
}
if (psend != -1) {
ip6mr_forward2(skb, cache, psend);
ip6mr_forward2(net, mrt, skb, cache, psend);
return 0;
}
......@@ -1659,9 +1969,19 @@ int ip6_mr_input(struct sk_buff *skb)
{
struct mfc6_cache *cache;
struct net *net = dev_net(skb->dev);
struct mr6_table *mrt;
struct flowi fl = {
.iif = skb->dev->ifindex,
.mark = skb->mark,
};
int err;
err = ip6mr_fib_lookup(net, &fl, &mrt);
if (err < 0)
return err;
read_lock(&mrt_lock);
cache = ip6mr_cache_find(net,
cache = ip6mr_cache_find(mrt,
&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr);
/*
......@@ -1670,9 +1990,9 @@ int ip6_mr_input(struct sk_buff *skb)
if (cache == NULL) {
int vif;
vif = ip6mr_find_vif(skb->dev);
vif = ip6mr_find_vif(mrt, skb->dev);
if (vif >= 0) {
int err = ip6mr_cache_unresolved(net, vif, skb);
int err = ip6mr_cache_unresolved(mrt, vif, skb);
read_unlock(&mrt_lock);
return err;
......@@ -1682,7 +2002,7 @@ int ip6_mr_input(struct sk_buff *skb)
return -ENODEV;
}
ip6_mr_forward(skb, cache);
ip6_mr_forward(net, mrt, skb, cache);
read_unlock(&mrt_lock);
......@@ -1690,12 +2010,11 @@ int ip6_mr_input(struct sk_buff *skb)
}
static int
ip6mr_fill_mroute(struct sk_buff *skb, struct mfc6_cache *c, struct rtmsg *rtm)
static int __ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb,
struct mfc6_cache *c, struct rtmsg *rtm)
{
int ct;
struct rtnexthop *nhp;
struct net *net = mfc6_net(c);
u8 *b = skb_tail_pointer(skb);
struct rtattr *mp_head;
......@@ -1703,19 +2022,19 @@ ip6mr_fill_mroute(struct sk_buff *skb, struct mfc6_cache *c, struct rtmsg *rtm)
if (c->mf6c_parent > MAXMIFS)
return -ENOENT;
if (MIF_EXISTS(net, c->mf6c_parent))
RTA_PUT(skb, RTA_IIF, 4, &net->ipv6.vif6_table[c->mf6c_parent].dev->ifindex);
if (MIF_EXISTS(mrt, c->mf6c_parent))
RTA_PUT(skb, RTA_IIF, 4, &mrt->vif6_table[c->mf6c_parent].dev->ifindex);
mp_head = (struct rtattr *)skb_put(skb, RTA_LENGTH(0));
for (ct = c->mfc_un.res.minvif; ct < c->mfc_un.res.maxvif; ct++) {
if (MIF_EXISTS(net, ct) && c->mfc_un.res.ttls[ct] < 255) {
if (MIF_EXISTS(mrt, ct) && c->mfc_un.res.ttls[ct] < 255) {
if (skb_tailroom(skb) < RTA_ALIGN(RTA_ALIGN(sizeof(*nhp)) + 4))
goto rtattr_failure;
nhp = (struct rtnexthop *)skb_put(skb, RTA_ALIGN(sizeof(*nhp)));
nhp->rtnh_flags = 0;
nhp->rtnh_hops = c->mfc_un.res.ttls[ct];
nhp->rtnh_ifindex = net->ipv6.vif6_table[ct].dev->ifindex;
nhp->rtnh_ifindex = mrt->vif6_table[ct].dev->ifindex;
nhp->rtnh_len = sizeof(*nhp);
}
}
......@@ -1733,11 +2052,16 @@ int ip6mr_get_route(struct net *net,
struct sk_buff *skb, struct rtmsg *rtm, int nowait)
{
int err;
struct mr6_table *mrt;
struct mfc6_cache *cache;
struct rt6_info *rt = (struct rt6_info *)skb_dst(skb);
mrt = ip6mr_get_table(net, RT6_TABLE_DFLT);
if (mrt == NULL)
return -ENOENT;
read_lock(&mrt_lock);
cache = ip6mr_cache_find(net, &rt->rt6i_src.addr, &rt->rt6i_dst.addr);
cache = ip6mr_cache_find(mrt, &rt->rt6i_src.addr, &rt->rt6i_dst.addr);
if (!cache) {
struct sk_buff *skb2;
......@@ -1751,7 +2075,7 @@ int ip6mr_get_route(struct net *net,
}
dev = skb->dev;
if (dev == NULL || (vif = ip6mr_find_vif(dev)) < 0) {
if (dev == NULL || (vif = ip6mr_find_vif(mrt, dev)) < 0) {
read_unlock(&mrt_lock);
return -ENODEV;
}
......@@ -1780,7 +2104,7 @@ int ip6mr_get_route(struct net *net,
ipv6_addr_copy(&iph->saddr, &rt->rt6i_src.addr);
ipv6_addr_copy(&iph->daddr, &rt->rt6i_dst.addr);
err = ip6mr_cache_unresolved(net, vif, skb2);
err = ip6mr_cache_unresolved(mrt, vif, skb2);
read_unlock(&mrt_lock);
return err;
......@@ -1789,8 +2113,88 @@ int ip6mr_get_route(struct net *net,
if (!nowait && (rtm->rtm_flags&RTM_F_NOTIFY))
cache->mfc_flags |= MFC_NOTIFY;
err = ip6mr_fill_mroute(skb, cache, rtm);
err = __ip6mr_fill_mroute(mrt, skb, cache, rtm);
read_unlock(&mrt_lock);
return err;
}
static int ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb,
u32 pid, u32 seq, struct mfc6_cache *c)
{
struct nlmsghdr *nlh;
struct rtmsg *rtm;
nlh = nlmsg_put(skb, pid, seq, RTM_NEWROUTE, sizeof(*rtm), NLM_F_MULTI);
if (nlh == NULL)
return -EMSGSIZE;
rtm = nlmsg_data(nlh);
rtm->rtm_family = RTNL_FAMILY_IPMR;
rtm->rtm_dst_len = 128;
rtm->rtm_src_len = 128;
rtm->rtm_tos = 0;
rtm->rtm_table = mrt->id;
NLA_PUT_U32(skb, RTA_TABLE, mrt->id);
rtm->rtm_scope = RT_SCOPE_UNIVERSE;
rtm->rtm_protocol = RTPROT_UNSPEC;
rtm->rtm_flags = 0;
NLA_PUT(skb, RTA_SRC, 16, &c->mf6c_origin);
NLA_PUT(skb, RTA_DST, 16, &c->mf6c_mcastgrp);
if (__ip6mr_fill_mroute(mrt, skb, c, rtm) < 0)
goto nla_put_failure;
return nlmsg_end(skb, nlh);
nla_put_failure:
nlmsg_cancel(skb, nlh);
return -EMSGSIZE;
}
static int ip6mr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb)
{
struct net *net = sock_net(skb->sk);
struct mr6_table *mrt;
struct mfc6_cache *mfc;
unsigned int t = 0, s_t;
unsigned int h = 0, s_h;
unsigned int e = 0, s_e;
s_t = cb->args[0];
s_h = cb->args[1];
s_e = cb->args[2];
read_lock(&mrt_lock);
ip6mr_for_each_table(mrt, net) {
if (t < s_t)
goto next_table;
if (t > s_t)
s_h = 0;
for (h = s_h; h < MFC6_LINES; h++) {
list_for_each_entry(mfc, &mrt->mfc6_cache_array[h], list) {
if (e < s_e)
goto next_entry;
if (ip6mr_fill_mroute(mrt, skb,
NETLINK_CB(cb->skb).pid,
cb->nlh->nlmsg_seq,
mfc) < 0)
goto done;
next_entry:
e++;
}
e = s_e = 0;
}
s_h = 0;
next_table:
t++;
}
done:
read_unlock(&mrt_lock);
cb->args[2] = e;
cb->args[1] = h;
cb->args[0] = t;
return skb->len;
}
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