v4.19.13 snapshot.
diff --git a/include/linux/nfsacl.h b/include/linux/nfsacl.h
new file mode 100644
index 0000000..103d446
--- /dev/null
+++ b/include/linux/nfsacl.h
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * File: linux/nfsacl.h
+ *
+ * (C) 2003 Andreas Gruenbacher <agruen@suse.de>
+ */
+#ifndef __LINUX_NFSACL_H
+#define __LINUX_NFSACL_H
+
+
+#include <linux/posix_acl.h>
+#include <linux/sunrpc/xdr.h>
+#include <uapi/linux/nfsacl.h>
+
+/* Maximum number of ACL entries over NFS */
+#define NFS_ACL_MAX_ENTRIES 1024
+
+#define NFSACL_MAXWORDS (2*(2+3*NFS_ACL_MAX_ENTRIES))
+#define NFSACL_MAXPAGES ((2*(8+12*NFS_ACL_MAX_ENTRIES) + PAGE_SIZE-1) \
+ >> PAGE_SHIFT)
+
+#define NFS_ACL_MAX_ENTRIES_INLINE (5)
+#define NFS_ACL_INLINE_BUFSIZE ((2*(2+3*NFS_ACL_MAX_ENTRIES_INLINE)) << 2)
+
+static inline unsigned int
+nfsacl_size(struct posix_acl *acl_access, struct posix_acl *acl_default)
+{
+ unsigned int w = 16;
+ w += max(acl_access ? (int)acl_access->a_count : 3, 4) * 12;
+ if (acl_default)
+ w += max((int)acl_default->a_count, 4) * 12;
+ return w;
+}
+
+extern int
+nfsacl_encode(struct xdr_buf *buf, unsigned int base, struct inode *inode,
+ struct posix_acl *acl, int encode_entries, int typeflag);
+extern int
+nfsacl_decode(struct xdr_buf *buf, unsigned int base, unsigned int *aclcnt,
+ struct posix_acl **pacl);
+
+#endif /* __LINUX_NFSACL_H */