[UNIX]: Make the unix sysctl tables per-namespace
This is the core.
* add the ctl_table_header on the struct net;
* make the unix_sysctl_register and _unregister clone the table;
* moves calls to them into per-net init and exit callbacks;
* move the .data pointer in the proper place.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/unix/sysctl_net_unix.c b/net/unix/sysctl_net_unix.c
index 43dd356..553ef6a 100644
--- a/net/unix/sysctl_net_unix.c
+++ b/net/unix/sysctl_net_unix.c
@@ -32,16 +32,33 @@
{ },
};
-static struct ctl_table_header * unix_sysctl_header;
-
int unix_sysctl_register(struct net *net)
{
- unix_sysctl_header = register_sysctl_paths(unix_path, unix_table);
- return unix_sysctl_header == NULL ? -ENOMEM : 0;
+ struct ctl_table *table;
+
+ table = kmemdup(unix_table, sizeof(unix_table), GFP_KERNEL);
+ if (table == NULL)
+ goto err_alloc;
+
+ table[0].data = &net->sysctl_unix_max_dgram_qlen;
+ net->unix_ctl = register_net_sysctl_table(net, unix_path, table);
+ if (net->unix_ctl == NULL)
+ goto err_reg;
+
+ return 0;
+
+err_reg:
+ kfree(table);
+err_alloc:
+ return -ENOMEM;
}
void unix_sysctl_unregister(struct net *net)
{
- unregister_sysctl_table(unix_sysctl_header);
+ struct ctl_table *table;
+
+ table = net->unix_ctl->ctl_table_arg;
+ unregister_sysctl_table(net->unix_ctl);
+ kfree(table);
}