userns: Make create_new_namespaces take a user_ns parameter
Modify create_new_namespaces to explicitly take a user namespace
parameter, instead of implicitly through the task_struct.
This allows an implementation of unshare(CLONE_NEWUSER) where
the new user namespace is not stored onto the current task_struct
until after all of the namespaces are created.
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
diff --git a/include/linux/ipc_namespace.h b/include/linux/ipc_namespace.h
index 5499c92..f03af70 100644
--- a/include/linux/ipc_namespace.h
+++ b/include/linux/ipc_namespace.h
@@ -133,7 +133,8 @@
#if defined(CONFIG_IPC_NS)
extern struct ipc_namespace *copy_ipcs(unsigned long flags,
- struct task_struct *tsk);
+ struct user_namespace *user_ns, struct ipc_namespace *ns);
+
static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns)
{
if (ns)
@@ -144,12 +145,12 @@
extern void put_ipc_ns(struct ipc_namespace *ns);
#else
static inline struct ipc_namespace *copy_ipcs(unsigned long flags,
- struct task_struct *tsk)
+ struct user_namespace *user_ns, struct ipc_namespace *ns)
{
if (flags & CLONE_NEWIPC)
return ERR_PTR(-EINVAL);
- return tsk->nsproxy->ipc_ns;
+ return ns;
}
static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns)
diff --git a/include/linux/utsname.h b/include/linux/utsname.h
index 2b34520..221f4a0 100644
--- a/include/linux/utsname.h
+++ b/include/linux/utsname.h
@@ -33,7 +33,7 @@
}
extern struct uts_namespace *copy_utsname(unsigned long flags,
- struct task_struct *tsk);
+ struct user_namespace *user_ns, struct uts_namespace *old_ns);
extern void free_uts_ns(struct kref *kref);
static inline void put_uts_ns(struct uts_namespace *ns)
@@ -50,12 +50,12 @@
}
static inline struct uts_namespace *copy_utsname(unsigned long flags,
- struct task_struct *tsk)
+ struct user_namespace *user_ns, struct uts_namespace *old_ns)
{
if (flags & CLONE_NEWUTS)
return ERR_PTR(-EINVAL);
- return tsk->nsproxy->uts_ns;
+ return old_ns;
}
#endif