26  * @parent: Parent domain.
27  * @child: Potential child of @parent.
29  * Checks if the @parent domain is less or equal to (i.e. an ancestor, which
32 static bool domain_scope_le(const struct landlock_ruleset *const parent,  in domain_scope_le()  argument
37 	if (!parent)  in domain_scope_le()
41 	for (walker = child->hierarchy; walker; walker = walker->parent) {  in domain_scope_le()
42 		if (walker == parent->hierarchy)  in domain_scope_le()
43 			/* @parent is in the scoped hierarchy of @child. */  in domain_scope_le()
46 	/* There is no relationship between @parent and @child. */  in domain_scope_le()
50 static bool task_is_scoped(const struct task_struct *const parent,  in task_is_scoped()  argument
57 	dom_parent = landlock_get_task_domain(parent);  in task_is_scoped()
64 static int task_ptrace(const struct task_struct *const parent,  in task_ptrace()  argument
68 	if (!landlocked(parent))  in task_ptrace()
70 	if (task_is_scoped(parent, child))  in task_ptrace()
98  * @parent: Task proposed to be the tracer.
100  * If the parent has Landlock rules, then the current task must have the same
106 static int hook_ptrace_traceme(struct task_struct *const parent)  in hook_ptrace_traceme()  argument
108 	return task_ptrace(parent, current);  in hook_ptrace_traceme()