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 000000000..444236dad
--- /dev/null
+++ b/include/linux/fault-inject.h
@@ -0,0 +1,84 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_FAULT_INJECT_H
+#define _LINUX_FAULT_INJECT_H
+
+#ifdef CONFIG_FAULT_INJECTION
+
+#include <linux/types.h>
+#include <linux/debugfs.h>
+#include <linux/ratelimit.h>
+#include <linux/atomic.h>
+
+/*
+ * For explanation of the elements of this struct, see
+ * Documentation/fault-injection/fault-injection.rst
+ */
+struct fault_attr {
+	unsigned long probability;
+	unsigned long interval;
+	atomic_t times;
+	atomic_t space;
+	unsigned long verbose;
+	bool 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;
+	struct ratelimit_state ratelimit_state;
+	struct dentry *dname;
+};
+
+enum fault_flags {
+	FAULT_NOWARN =	1 << 0,
+};
+
+#define FAULT_ATTR_INITIALIZER {					\
+		.interval = 1,						\
+		.times = ATOMIC_INIT(1),				\
+		.require_end = ULONG_MAX,				\
+		.stacktrace_depth = 32,					\
+		.ratelimit_state = RATELIMIT_STATE_INIT_DISABLED,	\
+		.verbose = 2,						\
+		.dname = NULL,						\
+	}
+
+#define DECLARE_FAULT_ATTR(name) struct fault_attr name = FAULT_ATTR_INITIALIZER
+int setup_fault_attr(struct fault_attr *attr, char *str);
+bool should_fail_ex(struct fault_attr *attr, ssize_t size, int flags);
+bool should_fail(struct fault_attr *attr, ssize_t size);
+
+#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
+
+struct dentry *fault_create_debugfs_attr(const char *name,
+			struct dentry *parent, struct fault_attr *attr);
+
+#else /* CONFIG_FAULT_INJECTION_DEBUG_FS */
+
+static inline struct dentry *fault_create_debugfs_attr(const char *name,
+			struct dentry *parent, struct fault_attr *attr)
+{
+	return ERR_PTR(-ENODEV);
+}
+
+#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
+
+#endif /* CONFIG_FAULT_INJECTION */
+
+struct kmem_cache;
+
+bool should_fail_alloc_page(gfp_t gfp_mask, unsigned int order);
+
+int should_failslab(struct kmem_cache *s, gfp_t gfpflags);
+#ifdef CONFIG_FAILSLAB
+extern bool __should_failslab(struct kmem_cache *s, gfp_t gfpflags);
+#else
+static inline bool __should_failslab(struct kmem_cache *s, gfp_t gfpflags)
+{
+	return false;
+}
+#endif /* CONFIG_FAILSLAB */
+
+#endif /* _LINUX_FAULT_INJECT_H */