btrfsck --readonly exited with status code 0
[1/7] checking root items
[2/7] checking extents
[3/7] checking free space tree
[4/7] checking fs roots
[5/7] checking only csums items (without verifying data)
[6/7] checking root refs
[7/7] checking quota groups skipped (not enabled on this FS)
Opening filesystem to check...
Checking filesystem on /tmp/4009310315.img
UUID: 7e32c2af-f87a-45a1-bcba-64dea7c56a53
found 159744 bytes used, no error found
total csum bytes: 24
total tree bytes: 147456
total fs tree bytes: 32768
total extent tree bytes: 16384
btree space waste bytes: 136556
file data blocks allocated: 12288
 referenced 12288