Creating a backstore fails, "Could not create _Backstore in configFS"

[jamespharvey20]

I've successfully used targetcli-fb off and on for years. I last used it in January, but no longer needed it, so removed all shares. I was using v2.1.fb49 then and now. I've also tried current git, 85031ad. I'm also running python-rtslib-fb 2.1.fb69, using python3, and python-configshell-fb 1.1.fb25, also using python3.

# systemctl start target
# targetcli-fb
targetcli shell version 2.1.fb49
Copyright 2011-2013 by Datera, Inc and others.
For help on commands, type 'help'.

/> cd /backstores/block
/backstores/block> create <NAME> /dev/lvm/<BLOCK-DEVICE-NAME>
Could not create _Backstore in configFS

I'm running Arch Linux, which is a rolling release, so basically has the current version of everything, including kernel 5.1.15.

Unfortunately, as I didn't try using it between January and now, I don't know when it would have stopped working or what would have triggered it. I think it has to be one of its dependencies that changed, requiring an update for targetcli-fb.

I did see #130

I don't know if it's related at all. I never had to do anything with mounting before. I do see:

mount | grep configfs
configfs                          /sys/kernel/config                 configfs    (rw,nosuid,nodev,noexec,relatime)

And, within there, is pci_ep, rdma_cm, and target.

I tried remounting /sys/kernel/config/, based on the other issue, which had no effect. Nothing has ever been mounted at /config/.

[jamespharvey20]

Upgrading to python-configshell-fb 1.1.26 and targetcli-fb 2.1.50 fixes the issue.