1 files changed, 84 insertions, 0 deletions

diff --git a/include/linux/fault-inject.h b/include/linux/fault-inject.h
new file mode 100644
index 000000000000..32368c4f0326
--- /dev/null
+++ b/include/linux/fault-inject.h
@@ -0,0 +1,84 @@
+#ifndef _LINUX_FAULT_INJECT_H
+#define _LINUX_FAULT_INJECT_H
+
+#ifdef CONFIG_FAULT_INJECTION
+
+#include <linux/types.h>
+#include <linux/debugfs.h>
+#include <asm/atomic.h>
+
+/*
+ * For explanation of the elements of this struct, see
+ * Documentation/fault-injection/fault-injection.txt
+ */
+struct fault_attr {
+        unsigned long probability;
+        unsigned long interval;
+        atomic_t times;
+        atomic_t space;
+        unsigned long verbose;
+        u32 task_filter;
+        unsigned long stacktrace_depth;
+        unsigned long require_start;
+        unsigned long require_end;
+        unsigned long reject_start;
+        unsigned long reject_end;
+
+        unsigned long count;
+
+#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
+
+        struct {
+                struct dentry *dir;
+
+                struct dentry *probability_file;
+                struct dentry *interval_file;
+                struct dentry *times_file;
+                struct dentry *space_file;
+                struct dentry *verbose_file;
+                struct dentry *task_filter_file;
+                struct dentry *stacktrace_depth_file;
+                struct dentry *require_start_file;
+                struct dentry *require_end_file;
+                struct dentry *reject_start_file;
+                struct dentry *reject_end_file;
+        } dentries;
+
+#endif
+};
+
+#define FAULT_ATTR_INITIALIZER {                                \
+                .interval = 1,                                  \
+                .times = ATOMIC_INIT(1),                        \
+                .require_end = ULONG_MAX,                       \
+                .stacktrace_depth = 32,                         \
+                .verbose = 2,                                   \
+        }
+
+#define DECLARE_FAULT_ATTR(name) struct fault_attr name = FAULT_ATTR_INITIALIZER
+int setup_fault_attr(struct fault_attr *attr, char *str);
+void should_fail_srandom(unsigned long entropy);
+bool should_fail(struct fault_attr *attr, ssize_t size);
+
+#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
+
+int init_fault_attr_dentries(struct fault_attr *attr, const char *name);
+void cleanup_fault_attr_dentries(struct fault_attr *attr);
+
+#else /* CONFIG_FAULT_INJECTION_DEBUG_FS */
+
+static inline int init_fault_attr_dentries(struct fault_attr *attr,
+                                          const char *name)
+{
+        return -ENODEV;
+}
+
+static inline void cleanup_fault_attr_dentries(struct fault_attr *attr)
+{
+}
+
+#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
+
+#endif /* CONFIG_FAULT_INJECTION */
+
+#endif /* _LINUX_FAULT_INJECT_H */