Commit bc8a3694 authored by Eric W. Biederman's avatar Eric W. Biederman Committed by David S. Miller

net sysctl: Register an empty /proc/sys/net

Implementation limitations of the sysctl core won't let /proc/sys/net
reside in a network namespace.  /proc/sys/net at least must be registered
as a normal sysctl.  So register /proc/sys/net early as an empty directory
to guarantee we don't violate this constraint and hit bugs in the sysctl
implementation.
Signed-off-by: default avatarEric W. Biederman <ebiederm@xmission.com>
Acked-by: default avatarPavel Emelyanov <xemul@parallels.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ab41a2ca
...@@ -88,9 +88,18 @@ static struct pernet_operations sysctl_pernet_ops = { ...@@ -88,9 +88,18 @@ static struct pernet_operations sysctl_pernet_ops = {
.exit = sysctl_net_exit, .exit = sysctl_net_exit,
}; };
static struct ctl_table_header *net_header;
static __init int net_sysctl_init(void) static __init int net_sysctl_init(void)
{ {
int ret; static struct ctl_table empty[1];
int ret = -ENOMEM;
/* Avoid limitations in the sysctl implementation by
* registering "/proc/sys/net" as an empty directory not in a
* network namespace.
*/
net_header = register_sysctl("net", empty);
if (!net_header)
goto out;
ret = register_pernet_subsys(&sysctl_pernet_ops); ret = register_pernet_subsys(&sysctl_pernet_ops);
if (ret) if (ret)
goto out; goto out;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment