#include <linux/audit.h>
#include <linux/capability.h>
#include <linux/mm.h>
-#include <linux/module.h>
+#include <linux/export.h>
#include <linux/security.h>
#include <linux/syscalls.h>
#include <linux/pid_namespace.h>
*/
const kernel_cap_t __cap_empty_set = CAP_EMPTY_SET;
-const kernel_cap_t __cap_full_set = CAP_FULL_SET;
EXPORT_SYMBOL(__cap_empty_set);
-EXPORT_SYMBOL(__cap_full_set);
int file_caps_enabled = 1;
}
/**
- * has_capability - Does a task have a capability in init_user_ns
+ * has_ns_capability - Does a task have a capability in a specific user ns
* @t: The task in question
+ * @ns: target user namespace
* @cap: The capability to be tested for
*
* Return true if the specified task has the given superior capability
- * currently in effect to the initial user namespace, false if not.
+ * currently in effect to the specified user namespace, false if not.
*
* Note that this does not set PF_SUPERPRIV on the task.
*/
-bool has_capability(struct task_struct *t, int cap)
+bool has_ns_capability(struct task_struct *t,
+ struct user_namespace *ns, int cap)
{
- int ret = security_real_capable(t, &init_user_ns, cap);
+ int ret;
+
+ rcu_read_lock();
+ ret = security_capable(__task_cred(t), ns, cap);
+ rcu_read_unlock();
return (ret == 0);
}
/**
- * has_capability - Does a task have a capability in a specific user ns
+ * has_capability - Does a task have a capability in init_user_ns
* @t: The task in question
- * @ns: target user namespace
* @cap: The capability to be tested for
*
* Return true if the specified task has the given superior capability
- * currently in effect to the specified user namespace, false if not.
+ * currently in effect to the initial user namespace, false if not.
*
* Note that this does not set PF_SUPERPRIV on the task.
*/
-bool has_ns_capability(struct task_struct *t,
- struct user_namespace *ns, int cap)
+bool has_capability(struct task_struct *t, int cap)
{
- int ret = security_real_capable(t, ns, cap);
-
- return (ret == 0);
+ return has_ns_capability(t, &init_user_ns, cap);
}
/**
- * has_capability_noaudit - Does a task have a capability (unaudited)
+ * has_ns_capability_noaudit - Does a task have a capability (unaudited)
+ * in a specific user ns.
* @t: The task in question
+ * @ns: target user namespace
* @cap: The capability to be tested for
*
* Return true if the specified task has the given superior capability
- * currently in effect to init_user_ns, false if not. Don't write an
- * audit message for the check.
+ * currently in effect to the specified user namespace, false if not.
+ * Do not write an audit message for the check.
*
* Note that this does not set PF_SUPERPRIV on the task.
*/
-bool has_capability_noaudit(struct task_struct *t, int cap)
+bool has_ns_capability_noaudit(struct task_struct *t,
+ struct user_namespace *ns, int cap)
{
- int ret = security_real_capable_noaudit(t, &init_user_ns, cap);
+ int ret;
+
+ rcu_read_lock();
+ ret = security_capable_noaudit(__task_cred(t), ns, cap);
+ rcu_read_unlock();
return (ret == 0);
}
/**
- * capable - Determine if the current task has a superior capability in effect
+ * has_capability_noaudit - Does a task have a capability (unaudited) in the
+ * initial user ns
+ * @t: The task in question
* @cap: The capability to be tested for
*
- * Return true if the current task has the given superior capability currently
- * available for use, false if not.
+ * Return true if the specified task has the given superior capability
+ * currently in effect to init_user_ns, false if not. Don't write an
+ * audit message for the check.
*
- * This sets PF_SUPERPRIV on the task if the capability is available on the
- * assumption that it's about to be used.
+ * Note that this does not set PF_SUPERPRIV on the task.
*/
-bool capable(int cap)
+bool has_capability_noaudit(struct task_struct *t, int cap)
{
- return ns_capable(&init_user_ns, cap);
+ return has_ns_capability_noaudit(t, &init_user_ns, cap);
}
-EXPORT_SYMBOL(capable);
/**
* ns_capable - Determine if the current task has a superior capability in effect
BUG();
}
- if (security_capable(ns, current_cred(), cap) == 0) {
+ if (security_capable(current_cred(), ns, cap) == 0) {
current->flags |= PF_SUPERPRIV;
return true;
}
EXPORT_SYMBOL(ns_capable);
/**
- * task_ns_capable - Determine whether current task has a superior
- * capability targeted at a specific task's user namespace.
- * @t: The task whose user namespace is targeted.
- * @cap: The capability in question.
+ * capable - Determine if the current task has a superior capability in effect
+ * @cap: The capability to be tested for
+ *
+ * Return true if the current task has the given superior capability currently
+ * available for use, false if not.
+ *
+ * This sets PF_SUPERPRIV on the task if the capability is available on the
+ * assumption that it's about to be used.
+ */
+bool capable(int cap)
+{
+ return ns_capable(&init_user_ns, cap);
+}
+EXPORT_SYMBOL(capable);
+
+/**
+ * nsown_capable - Check superior capability to one's own user_ns
+ * @cap: The capability in question
*
- * Return true if it does, false otherwise.
+ * Return true if the current task has the given superior capability
+ * targeted at its own user namespace.
*/
-bool task_ns_capable(struct task_struct *t, int cap)
+bool nsown_capable(int cap)
{
- return ns_capable(task_cred_xxx(t, user)->user_ns, cap);
+ return ns_capable(current_user_ns(), cap);
}
-EXPORT_SYMBOL(task_ns_capable);
projects / linux-flexiantxendom0-3.2.10.git / blobdiff