[NET] sysctl: prepare core tables to point to netns variables
Some of ctl variables are going to be on the struct
net. Here's the way to adjust the ->data pointer on the
ctl_table-s to point on the right variable.
Since some pointers still point on the global variables,
I keep turning the write bits off on such tables.
This looks to become a common procedure for net sysctls,
so later parts of this code may migrate to some more
generic place.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/sysctl_net_core.c b/net/core/sysctl_net_core.c
index 57a7ead..dc4cf7d 100644
--- a/net/core/sysctl_net_core.c
+++ b/net/core/sysctl_net_core.c
@@ -167,8 +167,13 @@
if (tbl == NULL)
goto err_dup;
- for (tmp = tbl; tmp->procname; tmp++)
- tmp->mode &= ~0222;
+ for (tmp = tbl; tmp->procname; tmp++) {
+ if (tmp->data >= (void *)&init_net &&
+ tmp->data < (void *)(&init_net + 1))
+ tmp->data += (char *)net - (char *)&init_net;
+ else
+ tmp->mode &= ~0222;
+ }
}
net->sysctl_core_hdr = register_net_sysctl_table(net,