[Qemu-discuss] Does qemu-img support creating tftp json backing file?

[Han Han]

Hi, all
I try to create a json backing file via tftp protocol but failed.
# curl tftp://10.66.6.236/tftp -o tftp
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  100M  100  100M    0     0  2680k      0  0:00:38  0:00:38 --:--:-- 2674k
100  100M  100  100M    0     0  2680k      0  0:00:38  0:00:38 --:--:-- 2680k

# qemu-img create -f qcow2 -b 'json:{"file.driver":"tftp", 
"file.url":"tftp://10.66.6.236:69/tftp"}' /var/lib/libvirt/images/tftp.img
qemu-img: /var/lib/libvirt/images/tftp.img: CURL: Error opening file: 
getpeername() failed with errno 107: Transport endpoint is not connected

Is tftp supported in qemu-img? How can I solve the issue? Thks

Han Han