Btrfs devel - Jul 2010 - dumpe2fs -h ./test.img or xfs_db -c 'freesp -m binmult' ./test.img analog

Hello!

I''m new with btrfs, i have loop image file with btrfs on it.
If i use ext3 or xfs i can get free blocks by 
dumpe2fs -h ./test.img or 
xfs_db -c ''freesp -m binmult'' ./test.img analog
commands

How can i check free blocks in btrfs image file?

-- 
Vasiliy G Tolstov <v.tolstov@selfip.ru>
Selfip.Ru

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