[NETNS][IPV6] route6 - make route6 per namespace
This patch makes the routing engine use the network namespaces to
access routing informations: Add a network namespace parameter to
ipv6_route_ioctl and propagate the network namespace value to all the
routing code that have not yet been changed.
Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: Benjamin Thery <benjamin.thery@bull.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index ad3d684..b3ac490 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -609,7 +609,7 @@
int ip6_ins_rt(struct rt6_info *rt)
{
struct nl_info info = {
- .nl_net = &init_net,
+ .nl_net = rt->rt6i_dev->nd_net,
};
return __ip6_ins_rt(rt, &info);
}
@@ -746,6 +746,7 @@
void ip6_route_input(struct sk_buff *skb)
{
struct ipv6hdr *iph = ipv6_hdr(skb);
+ struct net *net = skb->dev->nd_net;
int flags = RT6_LOOKUP_F_HAS_SADDR;
struct flowi fl = {
.iif = skb->dev->ifindex,
@@ -763,7 +764,7 @@
if (rt6_need_strict(&iph->daddr))
flags |= RT6_LOOKUP_F_IFACE;
- skb->dst = fib6_rule_lookup(&init_net, &fl, flags, ip6_pol_route_input);
+ skb->dst = fib6_rule_lookup(net, &fl, flags, ip6_pol_route_input);
}
static struct rt6_info *ip6_pol_route_output(struct fib6_table *table,
@@ -891,12 +892,12 @@
static int ipv6_get_mtu(struct net_device *dev);
-static inline unsigned int ipv6_advmss(unsigned int mtu)
+static inline unsigned int ipv6_advmss(struct net *net, unsigned int mtu)
{
mtu -= sizeof(struct ipv6hdr) + sizeof(struct tcphdr);
- if (mtu < init_net.ipv6.sysctl.ip6_rt_min_advmss)
- mtu = init_net.ipv6.sysctl.ip6_rt_min_advmss;
+ if (mtu < net->ipv6.sysctl.ip6_rt_min_advmss)
+ mtu = net->ipv6.sysctl.ip6_rt_min_advmss;
/*
* Maximal non-jumbo IPv6 payload is IPV6_MAXPLEN and
@@ -918,6 +919,7 @@
{
struct rt6_info *rt;
struct inet6_dev *idev = in6_dev_get(dev);
+ struct net *net = dev->nd_net;
if (unlikely(idev == NULL))
return NULL;
@@ -940,7 +942,7 @@
atomic_set(&rt->u.dst.__refcnt, 1);
rt->u.dst.metrics[RTAX_HOPLIMIT-1] = 255;
rt->u.dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(rt->rt6i_dev);
- rt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(dst_mtu(&rt->u.dst));
+ rt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(net, dst_mtu(&rt->u.dst));
rt->u.dst.output = ip6_output;
#if 0 /* there's no chance to use these for ndisc */
@@ -956,7 +958,7 @@
icmp6_dst_gc_list = &rt->u.dst;
spin_unlock_bh(&icmp6_dst_lock);
- fib6_force_start_gc(dev->nd_net);
+ fib6_force_start_gc(net);
out:
return &rt->u.dst;
@@ -1049,6 +1051,7 @@
int ip6_route_add(struct fib6_config *cfg)
{
int err;
+ struct net *net = cfg->fc_nlinfo.nl_net;
struct rt6_info *rt = NULL;
struct net_device *dev = NULL;
struct inet6_dev *idev = NULL;
@@ -1063,7 +1066,7 @@
#endif
if (cfg->fc_ifindex) {
err = -ENODEV;
- dev = dev_get_by_index(&init_net, cfg->fc_ifindex);
+ dev = dev_get_by_index(net, cfg->fc_ifindex);
if (!dev)
goto out;
idev = in6_dev_get(dev);
@@ -1074,7 +1077,7 @@
if (cfg->fc_metric == 0)
cfg->fc_metric = IP6_RT_PRIO_USER;
- table = fib6_new_table(&init_net, cfg->fc_table);
+ table = fib6_new_table(net, cfg->fc_table);
if (table == NULL) {
err = -ENOBUFS;
goto out;
@@ -1121,12 +1124,12 @@
if ((cfg->fc_flags & RTF_REJECT) ||
(dev && (dev->flags&IFF_LOOPBACK) && !(addr_type&IPV6_ADDR_LOOPBACK))) {
/* hold loopback dev/idev if we haven't done so. */
- if (dev != init_net.loopback_dev) {
+ if (dev != net->loopback_dev) {
if (dev) {
dev_put(dev);
in6_dev_put(idev);
}
- dev = init_net.loopback_dev;
+ dev = net->loopback_dev;
dev_hold(dev);
idev = in6_dev_get(dev);
if (!idev) {
@@ -1163,7 +1166,7 @@
if (!(gwa_type&IPV6_ADDR_UNICAST))
goto out;
- grt = rt6_lookup(&init_net, gw_addr, NULL, cfg->fc_ifindex, 1);
+ grt = rt6_lookup(net, gw_addr, NULL, cfg->fc_ifindex, 1);
err = -EHOSTUNREACH;
if (grt == NULL)
@@ -1230,7 +1233,7 @@
if (!rt->u.dst.metrics[RTAX_MTU-1])
rt->u.dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(dev);
if (!rt->u.dst.metrics[RTAX_ADVMSS-1])
- rt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(dst_mtu(&rt->u.dst));
+ rt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(net, dst_mtu(&rt->u.dst));
rt->u.dst.dev = dev;
rt->rt6i_idev = idev;
rt->rt6i_table = table;
@@ -1271,7 +1274,7 @@
int ip6_del_rt(struct rt6_info *rt)
{
struct nl_info info = {
- .nl_net = &init_net,
+ .nl_net = rt->rt6i_dev->nd_net,
};
return __ip6_del_rt(rt, &info);
}
@@ -1283,7 +1286,7 @@
struct rt6_info *rt;
int err = -ESRCH;
- table = fib6_get_table(&init_net, cfg->fc_table);
+ table = fib6_get_table(cfg->fc_nlinfo.nl_net, cfg->fc_table);
if (table == NULL)
return err;
@@ -1382,6 +1385,7 @@
struct net_device *dev)
{
int flags = RT6_LOOKUP_F_HAS_SADDR;
+ struct net *net = dev->nd_net;
struct ip6rd_flowi rdfl = {
.fl = {
.oif = dev->ifindex,
@@ -1398,8 +1402,7 @@
if (rt6_need_strict(dest))
flags |= RT6_LOOKUP_F_IFACE;
- return (struct rt6_info *)fib6_rule_lookup(&init_net,
- (struct flowi *)&rdfl,
+ return (struct rt6_info *)fib6_rule_lookup(net, (struct flowi *)&rdfl,
flags, __ip6_route_redirect);
}
@@ -1457,7 +1460,8 @@
nrt->rt6i_nexthop = neigh_clone(neigh);
/* Reset pmtu, it may be better */
nrt->u.dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(neigh->dev);
- nrt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(dst_mtu(&nrt->u.dst));
+ nrt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(neigh->dev->nd_net,
+ dst_mtu(&nrt->u.dst));
if (ip6_ins_rt(nrt))
goto out;
@@ -1485,9 +1489,10 @@
struct net_device *dev, u32 pmtu)
{
struct rt6_info *rt, *nrt;
+ struct net *net = dev->nd_net;
int allfrag = 0;
- rt = rt6_lookup(dev->nd_net, daddr, saddr, dev->ifindex, 0);
+ rt = rt6_lookup(net, daddr, saddr, dev->ifindex, 0);
if (rt == NULL)
return;
@@ -1520,7 +1525,7 @@
rt->u.dst.metrics[RTAX_MTU-1] = pmtu;
if (allfrag)
rt->u.dst.metrics[RTAX_FEATURES-1] |= RTAX_FEATURE_ALLFRAG;
- dst_set_expires(&rt->u.dst, init_net.ipv6.sysctl.ip6_rt_mtu_expires);
+ dst_set_expires(&rt->u.dst, net->ipv6.sysctl.ip6_rt_mtu_expires);
rt->rt6i_flags |= RTF_MODIFIED|RTF_EXPIRES;
goto out;
}
@@ -1546,7 +1551,7 @@
* which is 10 mins. After 10 mins the decreased pmtu is expired
* and detecting PMTU increase will be automatically happened.
*/
- dst_set_expires(&nrt->u.dst, init_net.ipv6.sysctl.ip6_rt_mtu_expires);
+ dst_set_expires(&nrt->u.dst, net->ipv6.sysctl.ip6_rt_mtu_expires);
nrt->rt6i_flags |= RTF_DYNAMIC|RTF_EXPIRES;
ip6_ins_rt(nrt);
@@ -1659,7 +1664,7 @@
struct rt6_info *rt;
struct fib6_table *table;
- table = fib6_get_table(&init_net, RT6_TABLE_DFLT);
+ table = fib6_get_table(dev->nd_net, RT6_TABLE_DFLT);
if (table == NULL)
return NULL;
@@ -1688,6 +1693,9 @@
.fc_ifindex = dev->ifindex,
.fc_flags = RTF_GATEWAY | RTF_ADDRCONF | RTF_DEFAULT |
RTF_UP | RTF_EXPIRES | RTF_PREF(pref),
+ .fc_nlinfo.pid = 0,
+ .fc_nlinfo.nlh = NULL,
+ .fc_nlinfo.nl_net = dev->nd_net,
};
ipv6_addr_copy(&cfg.fc_gateway, gwaddr);
@@ -1720,7 +1728,8 @@
read_unlock_bh(&table->tb6_lock);
}
-static void rtmsg_to_fib6_config(struct in6_rtmsg *rtmsg,
+static void rtmsg_to_fib6_config(struct net *net,
+ struct in6_rtmsg *rtmsg,
struct fib6_config *cfg)
{
memset(cfg, 0, sizeof(*cfg));
@@ -1733,14 +1742,14 @@
cfg->fc_src_len = rtmsg->rtmsg_src_len;
cfg->fc_flags = rtmsg->rtmsg_flags;
- cfg->fc_nlinfo.nl_net = &init_net;
+ cfg->fc_nlinfo.nl_net = net;
ipv6_addr_copy(&cfg->fc_dst, &rtmsg->rtmsg_dst);
ipv6_addr_copy(&cfg->fc_src, &rtmsg->rtmsg_src);
ipv6_addr_copy(&cfg->fc_gateway, &rtmsg->rtmsg_gateway);
}
-int ipv6_route_ioctl(unsigned int cmd, void __user *arg)
+int ipv6_route_ioctl(struct net *net, unsigned int cmd, void __user *arg)
{
struct fib6_config cfg;
struct in6_rtmsg rtmsg;
@@ -1756,7 +1765,7 @@
if (err)
return -EFAULT;
- rtmsg_to_fib6_config(&rtmsg, &cfg);
+ rtmsg_to_fib6_config(net, &rtmsg, &cfg);
rtnl_lock();
switch (cmd) {
@@ -1835,21 +1844,22 @@
const struct in6_addr *addr,
int anycast)
{
+ struct net *net = idev->dev->nd_net;
struct rt6_info *rt = ip6_dst_alloc();
if (rt == NULL)
return ERR_PTR(-ENOMEM);
- dev_hold(init_net.loopback_dev);
+ dev_hold(net->loopback_dev);
in6_dev_hold(idev);
rt->u.dst.flags = DST_HOST;
rt->u.dst.input = ip6_input;
rt->u.dst.output = ip6_output;
- rt->rt6i_dev = init_net.loopback_dev;
+ rt->rt6i_dev = net->loopback_dev;
rt->rt6i_idev = idev;
rt->u.dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(rt->rt6i_dev);
- rt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(dst_mtu(&rt->u.dst));
+ rt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(net, dst_mtu(&rt->u.dst));
rt->u.dst.metrics[RTAX_HOPLIMIT-1] = -1;
rt->u.dst.obsolete = -1;
@@ -1866,7 +1876,7 @@
ipv6_addr_copy(&rt->rt6i_dst.addr, addr);
rt->rt6i_dst.plen = 128;
- rt->rt6i_table = fib6_get_table(&init_net, RT6_TABLE_LOCAL);
+ rt->rt6i_table = fib6_get_table(net, RT6_TABLE_LOCAL);
atomic_set(&rt->u.dst.__refcnt, 1);
@@ -1898,6 +1908,7 @@
{
struct rt6_mtu_change_arg *arg = (struct rt6_mtu_change_arg *) p_arg;
struct inet6_dev *idev;
+ struct net *net = arg->dev->nd_net;
/* In IPv6 pmtu discovery is not optional,
so that RTAX_MTU lock cannot disable it.
@@ -1929,7 +1940,7 @@
(dst_mtu(&rt->u.dst) < arg->mtu &&
dst_mtu(&rt->u.dst) == idev->cnf.mtu6))) {
rt->u.dst.metrics[RTAX_MTU-1] = arg->mtu;
- rt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(arg->mtu);
+ rt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(net, arg->mtu);
}
return 0;
}
@@ -2024,13 +2035,9 @@
static int inet6_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
{
- struct net *net = skb->sk->sk_net;
struct fib6_config cfg;
int err;
- if (net != &init_net)
- return -EINVAL;
-
err = rtm_to_fib6_config(skb, nlh, &cfg);
if (err < 0)
return err;
@@ -2040,13 +2047,9 @@
static int inet6_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
{
- struct net *net = skb->sk->sk_net;
struct fib6_config cfg;
int err;
- if (net != &init_net)
- return -EINVAL;
-
err = rtm_to_fib6_config(skb, nlh, &cfg);
if (err < 0)
return err;
@@ -2190,9 +2193,6 @@
struct flowi fl;
int err, iif = 0;
- if (net != &init_net)
- return -EINVAL;
-
err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy);
if (err < 0)
goto errout;
@@ -2222,7 +2222,7 @@
if (iif) {
struct net_device *dev;
- dev = __dev_get_by_index(&init_net, iif);
+ dev = __dev_get_by_index(net, iif);
if (!dev) {
err = -ENODEV;
goto errout;
@@ -2252,7 +2252,7 @@
goto errout;
}
- err = rtnl_unicast(skb, &init_net, NETLINK_CB(in_skb).pid);
+ err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid);
errout:
return err;
}
@@ -2260,6 +2260,7 @@
void inet6_rt_notify(int event, struct rt6_info *rt, struct nl_info *info)
{
struct sk_buff *skb;
+ struct net *net = info->nl_net;
u32 seq;
int err;
@@ -2278,11 +2279,11 @@
kfree_skb(skb);
goto errout;
}
- err = rtnl_notify(skb, &init_net, info->pid,
- RTNLGRP_IPV6_ROUTE, info->nlh, gfp_any());
+ err = rtnl_notify(skb, net, info->pid, RTNLGRP_IPV6_ROUTE,
+ info->nlh, gfp_any());
errout:
if (err < 0)
- rtnl_set_sk_err(&init_net, RTNLGRP_IPV6_ROUTE, err);
+ rtnl_set_sk_err(net, RTNLGRP_IPV6_ROUTE, err);
}
/*
@@ -2544,6 +2545,7 @@
proc_net_remove(net, "ipv6_route");
proc_net_remove(net, "rt6_stats");
#endif
+ rt6_ifdown(net, NULL);
}
static struct pernet_operations ip6_route_net_ops = {
@@ -2592,7 +2594,6 @@
xfrm6_init:
xfrm6_fini();
out_fib6_init:
- rt6_ifdown(&init_net, NULL);
fib6_gc_cleanup();
out_kmem_cache:
kmem_cache_destroy(ip6_dst_ops.kmem_cachep);
@@ -2604,7 +2605,6 @@
unregister_pernet_subsys(&ip6_route_net_ops);
fib6_rules_cleanup();
xfrm6_fini();
- rt6_ifdown(&init_net, NULL);
fib6_gc_cleanup();
kmem_cache_destroy(ip6_dst_ops.kmem_cachep);
}