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2023-12-08 01573e231f18eb2d99162747186f59511f56b64d

 kernel/include/linux/nsproxy.h
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..
@@ -35,11 +35,37 @@
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 	struct mnt_namespace *mnt_ns;
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 	struct pid_namespace *pid_ns_for_children;
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 	struct net 	     *net_ns;
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+	struct time_namespace *time_ns;
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+	struct time_namespace *time_ns_for_children;
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 	struct cgroup_namespace *cgroup_ns;
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 };
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 extern struct nsproxy init_nsproxy;
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 /*
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+ * A structure to encompass all bits needed to install
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+ * a partial or complete new set of namespaces.
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+ *
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+ * If a new user namespace is requested cred will
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+ * point to a modifiable set of credentials. If a pointer
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+ * to a modifiable set is needed nsset_cred() must be
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+ * used and tested.
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+ */
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+struct nsset {
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+	unsigned flags;
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+	struct nsproxy *nsproxy;
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+	struct fs_struct *fs;
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+	const struct cred *cred;
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+};
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+
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+static inline struct cred *nsset_cred(struct nsset *set)
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+{
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+	if (set->flags & CLONE_NEWUSER)
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+		return (struct cred *)set->cred;
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+
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+	return NULL;
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+}
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+
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+/*
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  * the namespaces access rules are:
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  *
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  *  1. only current task is allowed to change tsk->nsproxy pointer or