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netns: register net.ipv4.route.flush in each namespace 

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Denis V. Lunev 2008-07-05 19:02:33 -07:00 committed by David S. Miller
parent 639e104fac
commit 39a23e7508
2 changed files with 70 additions and 10 deletions
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1
include/net/netns/ipv4.h
View File

@ -18,6 +18,7 @@ struct netns_ipv4 {
struct ctl_table_header *forw_hdr;
struct ctl_table_header *frags_hdr;
struct ctl_table_header *ipv4_hdr;
struct ctl_table_header *route_hdr;
#endif
struct ipv4_devconf *devconf_all;
struct ipv4_devconf *devconf_dflt;

79
net/ipv4/route.c
View File

@ -2835,6 +2835,7 @@ static int ipv4_sysctl_rtcache_flush(ctl_table *ctl, int write,
{
if (write) {
int flush_delay;
struct net *net;
static DEFINE_MUTEX(flush_mutex);
mutex_lock(&flush_mutex);
@ -2843,7 +2844,8 @@ static int ipv4_sysctl_rtcache_flush(ctl_table *ctl, int write,
ctl->data = NULL;
mutex_unlock(&flush_mutex);
rt_cache_flush(&init_net, flush_delay);
net = (struct net *)ctl->extra1;
rt_cache_flush(net, flush_delay);
return 0;
}
@ -2859,23 +2861,17 @@ static int ipv4_sysctl_rtcache_flush_strategy(ctl_table *table,
size_t newlen)
{
int delay;
struct net *net;
if (newlen != sizeof(int))
return -EINVAL;
if (get_user(delay, (int __user *)newval))
return -EFAULT;
rt_cache_flush(&init_net, delay);
net = (struct net *)table->extra1;
rt_cache_flush(net, delay);
return 0;
}
ctl_table ipv4_route_table[] = {
{
.ctl_name = NET_IPV4_ROUTE_FLUSH,
.procname = "flush",
.maxlen = sizeof(int),
.mode = 0200,
.proc_handler = &ipv4_sysctl_rtcache_flush,
.strategy = &ipv4_sysctl_rtcache_flush_strategy,
},
{
.ctl_name = NET_IPV4_ROUTE_GC_THRESH,
.procname = "gc_thresh",
@ -3014,6 +3010,66 @@ ctl_table ipv4_route_table[] = {
},
{ .ctl_name = 0 }
};
static __net_initdata struct ctl_path ipv4_route_path[] = {
{ .procname = "net", .ctl_name = CTL_NET, },
{ .procname = "ipv4", .ctl_name = NET_IPV4, },
{ .procname = "route", .ctl_name = NET_IPV4_ROUTE, },
{ },
};
static struct ctl_table ipv4_route_flush_table[] = {
{
.ctl_name = NET_IPV4_ROUTE_FLUSH,
.procname = "flush",
.maxlen = sizeof(int),
.mode = 0200,
.proc_handler = &ipv4_sysctl_rtcache_flush,
.strategy = &ipv4_sysctl_rtcache_flush_strategy,
},
{ .ctl_name = 0 },
};
static __net_init int sysctl_route_net_init(struct net *net)
{
struct ctl_table *tbl;
tbl = ipv4_route_flush_table;
if (net != &init_net) {
tbl = kmemdup(tbl, sizeof(ipv4_route_flush_table), GFP_KERNEL);
if (tbl == NULL)
goto err_dup;
}
tbl[0].extra1 = net;
net->ipv4.route_hdr =
register_net_sysctl_table(net, ipv4_route_path, tbl);
if (net->ipv4.route_hdr == NULL)
goto err_reg;
return 0;
err_reg:
if (tbl != ipv4_route_flush_table)
kfree(tbl);
err_dup:
return -ENOMEM;
}
static __net_exit void sysctl_route_net_exit(struct net *net)
{
struct ctl_table *tbl;
tbl = net->ipv4.route_hdr->ctl_table_arg;
unregister_net_sysctl_table(net->ipv4.route_hdr);
BUG_ON(tbl == ipv4_route_flush_table);
kfree(tbl);
}
static __net_initdata struct pernet_operations sysctl_route_ops = {
.init = sysctl_route_net_init,
.exit = sysctl_route_net_exit,
};
#endif
#ifdef CONFIG_NET_CLS_ROUTE
@ -3090,6 +3146,9 @@ int __init ip_rt_init(void)
#endif
rtnl_register(PF_INET, RTM_GETROUTE, inet_rtm_getroute, NULL);
#ifdef CONFIG_SYSCTL
register_pernet_subsys(&sysctl_route_ops);
#endif
return rc;
}