summaryrefslogtreecommitdiff
path: root/include/linux/capability.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/linux/capability.h')
-rw-r--r--include/linux/capability.h36
1 files changed, 28 insertions, 8 deletions
diff --git a/include/linux/capability.h b/include/linux/capability.h
index fb16a3699b99..7c9c82903012 100644
--- a/include/linux/capability.h
+++ b/include/linux/capability.h
@@ -368,6 +368,17 @@ struct cpu_vfs_cap_data {
#ifdef __KERNEL__
+struct dentry;
+struct user_namespace;
+
+extern struct user_namespace init_user_ns;
+
+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
*/
@@ -530,10 +541,6 @@ 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
@@ -544,7 +551,7 @@ extern const kernel_cap_t __cap_init_eff_set;
*
* Note that this does not set PF_SUPERPRIV on the task.
*/
-#define has_capability(t, cap) (security_real_capable((t), (cap)) == 0)
+#define has_capability(t, cap) (security_real_capable((t), &init_user_ns, (cap)) == 0)
/**
* has_capability_noaudit - Determine if a task has a superior capability available (unaudited)
@@ -558,12 +565,25 @@ extern const kernel_cap_t __cap_init_eff_set;
* Note that this does not set PF_SUPERPRIV on the task.
*/
#define has_capability_noaudit(t, cap) \
- (security_real_capable_noaudit((t), (cap)) == 0)
+ (security_real_capable_noaudit((t), &init_user_ns, (cap)) == 0)
-extern int capable(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);
+
+/**
+ * nsown_capable - Check superior capability to one's own user_ns
+ * @cap: The capability in question
+ *
+ * Return true if the current task has the given superior capability
+ * targeted at its own user namespace.
+ */
+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__ */