shrink btrfs partition - recommended way?

[Ulli Horlacher <framstag@rus.uni-stuttgart.de>]

Is there a recommended way (or tool) to shrink a btrfs partition?

I have:

root@zoo:~# lsblk -o NAME,SIZE,FSTYPE,MOUNTPOINTS /dev/sdc
NAME    SIZE FSTYPE MOUNTPOINTS
sdc     256G
`-sdc1  256G btrfs  /LXC

root@zoo:~# df -Th /LXC
Filesystem     Type   Size  Used Avail Use% Mounted on
/dev/sdc1      btrfs  256G   19G  236G   8% /LXC

And want to shrink /dev/sdc1 to 200 GB

I know, I can use btrfs filesystem resize and afterwards use fdisk to
delete /dev/sdc1, create a new smaller /dev/sdc1 and then add a new
/dev/sdc2 
BUT if make a calculation error with fdisk the btrfs filesystem will be
damaged.
gparted can do it all together in one step, but it needs X11, which I do
not have on host zoo. I have only text console access, no X11.
                                       
-- 
Ullrich Horlacher              Server und Virtualisierung
Rechenzentrum TIK
Universitaet Stuttgart         E-Mail: horlacher@tik.uni-stuttgart.de
Allmandring 30a                Tel:    ++49-711-68565868
70569 Stuttgart (Germany)      WWW:    https://www.tik.uni-stuttgart.de/
REF:<20260628233658.GA3404176@tik.uni-stuttgart.de>