[stgt] Problem: automatic vtl setup using targets.conf vs script, failing on automatic

[Albert Pauw]

Ok,

here is the idea:

- I always used a script (vtl, attached) to set up a 3-drive virtual 
tape library, logged in using open-iscsi and he presto. That works.
One of the ways of testing it is using the mtx command to view the 
contents of the slots and drives.

- Now I wanted to convert it to a targets.conf file, so it can be used 
automatically at start up of tgt. So I did created a file (targets.conf, 
attached).

Starting that up automatically works, login into the target also works, 
I can see the devices using lsscsi. Asking the status of the separate 
drives works also
(mt -f /dev/nst0 status, etc). However, the mtx command hangs, in fact 
the whole tgtd daemon seems to hang as after some time the iscsid (the 
initiator)
daemon starts to send login requests, but gets no answer. I've added the 
two wireshark traces as well.

Here's the actions you could find in the traces:

-> login target
mt -f /dev/nst0
mt -f /dev/nst1
mt -f /dev/nst2
mtx -f /dev/changer status
-> logout target (only when done manually, automatically this is not 
possible)


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