./btrfs-debug-tree -r /dev/vg1/lv1
root tree: 112160768 level 0
chunk tree: 20971520 level 0
extent tree key (EXTENT_TREE ROOT_ITEM 0) 112164864 level 2
device tree key (DEV_TREE ROOT_ITEM 0) 31571968 level 0
fs tree key (FS_TREE ROOT_ITEM 0) 108474368 level 3
checksum tree key (CSUM_TREE ROOT_ITEM 0) 112181248 level 1
data reloc tree key (DATA_RELOC_TREE ROOT_ITEM 0) 29380608 level 0
total bytes 8589934592
bytes used 316157952
uuid de61833f-3d63-40c1-970c-2a7c4f5a7bcf
Btrfs v0.19-105-gff91b18-dirty