Update the volume superblock with latest fields

If the latest newfs_apfs creates an image with the default options,
older versions of fsck_apfs complain about an unknown volume superblock
field called "apfs_doc_id_index_flags". Several such new fields appear
to have been added, and after some bit flipping I managed to retrieve
the names for all of them, except for "apfs_doc_id_tree_oid" which is
only a (probably correct) guess.

I have no plans for these fields right now, but document them all in
apfs_raw.h anyway, so that I don't forget.

Signed-off-by: Ernesto A. Fernández <[email protected]>

Author: eafer

apfs_raw.h

@@ -1241,15 +1241,24 @@ struct apfs_superblock {
 
 	__le64 apfs_snap_meta_ext_oid;
 
-	char apfs_volume_group_id[UUID_SIZE];
+/*3F0*/	char apfs_volume_group_id[UUID_SIZE];
 
-	__le64 apfs_integrity_meta_oid;
+/*400*/	__le64 apfs_integrity_meta_oid;
 
 	__le64 apfs_fext_tree_oid;
-	__le32 apfs_fext_tree_type;
+/*410*/	__le32 apfs_fext_tree_type;
 
 	__le32 reserved_type;
 	__le64 reserved_oid;
+
+/*420*/	__le64 apfs_doc_id_index_xid;
+	__le32 apfs_doc_id_index_flags;
+	__le32 apfs_doc_id_tree_type;
+/*430*/	__le64 apfs_doc_id_tree_oid; /* Made-up name */
+	__le64 apfs_prev_doc_id_tree_oid;
+	__le64 apfs_doc_id_fixup_cursor;
+	__le64 apfs_sec_root_tree_oid;
+/*450*/	__le32 apfs_sec_root_tree_type;
 } __packed;
 
 /* Extended attributes constants */