xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[NETNS][IPV6]: Make multiple instance of sysctl tables.

Browse Source 
Each network namespace wants its own set of sysctl value, eg. we
should not be able from a namespace to set a sysctl value for another
namespace , especially for the initial network namespace.

This patch duplicates the sysctl table when we register a new network
namespace for ipv6. The duplicated table are postfixed with the
"template" word to notify the developper the table is cloned.

Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Lezcano
2008-01-10 02:53:43 -08:00
committed by David S. Miller
parent 89918fc270
commit 760f2d0186
5 changed files with 89 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

67
net/ipv6/sysctl_net_ipv6.c
View File

@@ -14,20 +14,23 @@
#include <net/addrconf.h>
#include <net/inet_frag.h>
static ctl_table ipv6_table[] = {
extern struct ctl_table *ipv6_route_sysctl_init(struct net *net);
extern struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
static ctl_table ipv6_table_template[] = {
{
.ctl_name = NET_IPV6_ROUTE,
.procname = "route",
.maxlen = 0,
.mode = 0555,
.child = ipv6_route_table
.child = ipv6_route_table_template
},
{
.ctl_name = NET_IPV6_ICMP,
.procname = "icmp",
.maxlen = 0,
.mode = 0555,
.child = ipv6_icmp_table
.child = ipv6_icmp_table_template
},
{
.ctl_name = NET_IPV6_BINDV6ONLY,
@@ -89,22 +92,66 @@ struct ctl_path net_ipv6_ctl_path[] = {
};
EXPORT_SYMBOL_GPL(net_ipv6_ctl_path);
static struct ctl_table_header *ipv6_sysctl_header;
static int ipv6_sysctl_net_init(struct net *net)
{
ipv6_sysctl_header = register_net_sysctl_table(net, net_ipv6_ctl_path,
ipv6_table);
if (!ipv6_sysctl_header)
struct ctl_table *ipv6_table;
struct ctl_table *ipv6_route_table;
struct ctl_table *ipv6_icmp_table;
int err;
err = -ENOMEM;
ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template),
GFP_KERNEL);
if (!ipv6_table)
goto out;
ipv6_route_table = ipv6_route_sysctl_init(net);
if (!ipv6_route_table)
goto out_ipv6_table;
ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
if (!ipv6_icmp_table)
goto out_ipv6_route_table;
ipv6_table[0].child = ipv6_route_table;
ipv6_table[1].child = ipv6_icmp_table;
net->ipv6.sysctl.table = register_net_sysctl_table(net, net_ipv6_ctl_path,
ipv6_table);
if (!net->ipv6.sysctl.table)
return -ENOMEM;
return 0;
if (!net->ipv6.sysctl.table)
goto out_ipv6_icmp_table;
err = 0;
out:
return err;
out_ipv6_icmp_table:
kfree(ipv6_icmp_table);
out_ipv6_route_table:
kfree(ipv6_route_table);
out_ipv6_table:
kfree(ipv6_table);
goto out;
}
static void ipv6_sysctl_net_exit(struct net *net)
{
unregister_net_sysctl_table(ipv6_sysctl_header);
struct ctl_table *ipv6_table;
struct ctl_table *ipv6_route_table;
struct ctl_table *ipv6_icmp_table;
ipv6_table = net->ipv6.sysctl.table->ctl_table_arg;
ipv6_route_table = ipv6_table[0].child;
ipv6_icmp_table = ipv6_table[1].child;
unregister_net_sysctl_table(net->ipv6.sysctl.table);
kfree(ipv6_table);
kfree(ipv6_route_table);
kfree(ipv6_icmp_table);
}
static struct pernet_operations ipv6_sysctl_net_ops = {