1 files changed, 36 insertions, 0 deletions
diff --git a/include/linux/memfd.h b/include/linux/memfd.h
new file mode 100644
index 000000000000..cc74de3dbcfe
--- /dev/null
+++ b/include/linux/memfd.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LINUX_MEMFD_H
+#define __LINUX_MEMFD_H
+
+#include <linux/file.h>
+
+#define MEMFD_ANON_NAME "[memfd]"
+
+#ifdef CONFIG_MEMFD_CREATE
+extern long memfd_fcntl(struct file *file, unsigned int cmd, unsigned int arg);
+struct folio *memfd_alloc_folio(struct file *memfd, pgoff_t idx);
+/*
+ * Check for any existing seals on mmap, return an error if access is denied due
+ * to sealing, or 0 otherwise.
+ *
+ * We also update VMA flags if appropriate by manipulating the VMA flags pointed
+ * to by vm_flags_ptr.
+ */
+int memfd_check_seals_mmap(struct file *file, vm_flags_t *vm_flags_ptr);
+#else
+static inline long memfd_fcntl(struct file *f, unsigned int c, unsigned int a)
+{
+	return -EINVAL;
+}
+static inline struct folio *memfd_alloc_folio(struct file *memfd, pgoff_t idx)
+{
+	return ERR_PTR(-EINVAL);
+}
+static inline int memfd_check_seals_mmap(struct file *file,
+					 vm_flags_t *vm_flags_ptr)
+{
+	return 0;
+}
+#endif
+
+#endif /* __LINUX_MEMFD_H */