userns: When the per user per user namespace limit is reached return ENOSPC
The current error codes returned when a the per user per user
namespace limit are hit (EINVAL, EUSERS, and ENFILE) are wrong. I
asked for advice on linux-api and it we made clear that those were
the wrong error code, but a correct effor code was not suggested.
The best general error code I have found for hitting a resource limit
is ENOSPC. It is not perfect but as it is unambiguous it will serve
until someone comes up with a better error code.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index 3e2812a..06af5d6 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -370,7 +370,7 @@
ucounts = inc_net_namespaces(user_ns);
if (!ucounts)
- return ERR_PTR(-ENFILE);
+ return ERR_PTR(-ENOSPC);
net = net_alloc();
if (!net) {