--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _BCACHEFS_XATTR_FORMAT_H
+#define _BCACHEFS_XATTR_FORMAT_H
+
+#define KEY_TYPE_XATTR_INDEX_USER 0
+#define KEY_TYPE_XATTR_INDEX_POSIX_ACL_ACCESS 1
+#define KEY_TYPE_XATTR_INDEX_POSIX_ACL_DEFAULT 2
+#define KEY_TYPE_XATTR_INDEX_TRUSTED 3
+#define KEY_TYPE_XATTR_INDEX_SECURITY 4
+
+struct bch_xattr {
+ struct bch_val v;
+ __u8 x_type;
+ __u8 x_name_len;
+ __le16 x_val_len;
+ __u8 x_name[];
+} __packed __aligned(8);
+
+#endif /* _BCACHEFS_XATTR_FORMAT_H */