btrbk: action-ls: add --format=rel, prints "subvolume_path" and "subv…

…olume_rel_path"

btrbk

@@ -218,8 +218,9 @@ my %table_formats = (
                  },
 
   fs_list     => { table => [ qw( mount_source id path ) ],
+                   rel   => [ qw( mount_source mount_point path subvolume_path subvolume_rel_path ) ],
                    long  => [ qw( mount_point mount_source id top_level cgen gen uuid parent_uuid received_uuid flags path ) ],
-                   raw   => [ qw( mount_point mount_source id top_level cgen gen uuid parent_uuid received_uuid readonly path ) ],
+                   raw   => [ qw( mount_point mount_source mount_subvolid id top_level cgen gen uuid parent_uuid received_uuid readonly path subvolume_path ) ],
                  },
 );
 
@@ -5169,6 +5170,9 @@ MAIN:
             %{$svol->{node}}, # copy node
             mount_point => $svol->{VINFO_MOUNTPOINT}{PATH},
             mount_source => $svol->{node}{TREE_ROOT}{host_mount_source},
+            mount_subvolid => $mnt->{MNTOPS}{subvolid},
+            subvolume_path => $svol->{node}{path},
+            subvolume_rel_path => $svol->{node}{REL_PATH},
             path => $svol->{PATH},
             flags => ($svol->{node}{readonly} ? "readonly" : undef),
           };