1 files changed, 24 insertions, 28 deletions

diff --git a/include/linux/capability.h b/include/linux/capability.h
index fb16a3699b99..16ee8b49a200 100644
--- a/include/linux/capability.h
+++ b/include/linux/capability.h
@@ -368,6 +368,15 @@ struct cpu_vfs_cap_data {
 
 #ifdef __KERNEL__
 
+struct dentry;
+struct user_namespace;
+
+struct user_namespace *current_user_ns(void);
+
+extern const kernel_cap_t __cap_empty_set;
+extern const kernel_cap_t __cap_full_set;
+extern const kernel_cap_t __cap_init_eff_set;
+
 /*
  * Internal kernel functions only
  */
@@ -530,40 +539,27 @@ static inline kernel_cap_t cap_raise_nfsd_set(const kernel_cap_t a,
                            cap_intersect(permitted, __cap_nfsd_set));
 }
 
-extern const kernel_cap_t __cap_empty_set;
-extern const kernel_cap_t __cap_full_set;
-extern const kernel_cap_t __cap_init_eff_set;
-
-/**
- * has_capability - Determine if a task has a superior capability available
- * @t: The task in question
- * @cap: The capability to be tested for
- *
- * Return true if the specified task has the given superior capability
- * currently in effect, false if not.
- *
- * Note that this does not set PF_SUPERPRIV on the task.
- */
-#define has_capability(t, cap) (security_real_capable((t), (cap)) == 0)
+extern bool has_capability(struct task_struct *t, int cap);
+extern bool has_ns_capability(struct task_struct *t,
+                              struct user_namespace *ns, int cap);
+extern bool has_capability_noaudit(struct task_struct *t, int cap);
+extern bool capable(int cap);
+extern bool ns_capable(struct user_namespace *ns, int cap);
+extern bool task_ns_capable(struct task_struct *t, int cap);
 
 /**
- * has_capability_noaudit - Determine if a task has a superior capability available (unaudited)
- * @t: The task in question
- * @cap: The capability to be tested for
+ * nsown_capable - Check superior capability to one's own user_ns
+ * @cap: The capability in question
  *
- * Return true if the specified task has the given superior capability
- * currently in effect, false if not, but don't write an audit message for the
- * check.
- *
- * Note that this does not set PF_SUPERPRIV on the task.
+ * Return true if the current task has the given superior capability
+ * targeted at its own user namespace.
  */
-#define has_capability_noaudit(t, cap) \
-        (security_real_capable_noaudit((t), (cap)) == 0)
-
-extern int capable(int cap);
+static inline bool nsown_capable(int cap)
+{
+        return ns_capable(current_user_ns(), cap);
+}
 
 /* audit system wants to get cap info from files as well */
-struct dentry;
 extern int get_vfs_caps_from_disk(const struct dentry *dentry, struct cpu_vfs_cap_data *cpu_caps);
 
 #endif /* __KERNEL__ */