Comment 2 for bug 967984

Testing from iscsitarget trunk with the update for revision 470 (released Fri Apr 6 21:58:31 2012 UTC)

http://iscsitarget.svn.sourceforge.net/viewvc/iscsitarget?revision=478&view=revision

It appears they have addressed this issue with the fix noted above. Obviously, this isn't included in the iscsitarget and iscsitarget-dkms packages in Ubuntu Precise currently. The issue notes there is a problem with kernel versions 3.2+ without the 478 fix in place.

Testing so far seems to indicate this is fixed with that update.

Testing:

creating a sparse image:

dd if=/dev/zero of=/fs.iscsi.disk bs=1M count=512

then creating target:

root@ubuntu-precise-beta2:~# ietadm --op new --tid=1 --params=Name=mytarget
root@ubuntu-precise-beta2:~# ietadm --op new --tid=1 --lun=0 --params=Path=/fs.iscsi.disk

shows available:

root@ubuntu-precise-beta2:~# cat /proc/net/iet/session
tid:1 name:mytarget

root@ubuntu-precise-beta2:~# cat /proc/net/iet/volume
tid:1 name:mytarget
        lun:0 state:0 iotype:fileio iomode:wt blocks:1048576 blocksize:512 path:/fs.iscsi.disk

login by client is successful:

root@ubuntu-precise-beta2:~# iscsiadm -m node -T mytarget -p 172.16.2.133:3260 --login
Logging in to [iface: default, target: mytarget, portal: 172.16.2.133,3260]
Login to [iface: default, target: mytarget, portal: 172.16.2.133,3260]: successful

and active session:

root@ubuntu-precise-beta2:~# cat /proc/net/iet/session
tid:1 name:mytarget
        sid:281474997486080 initiator:iqn.1993-08.org.debian:01:8f33344622fb
                cid:0 ip:172.16.2.133 state:active hd:none dd:none

properly refuses to delete in use target:

root@ubuntu-precise-beta2:~# ietadm --op delete --tid=1
Device or resource busy.

a successful logout:

root@ubuntu-precise-beta2:~# iscsiadm -m session --logout
Logging out of session [sid: 1, target: mytarget, portal: 172.16.2.133,3260]
Logout of [sid: 1, target: mytarget, portal: 172.16.2.133,3260]: successful

shows no active sessions:

root@ubuntu-precise-beta2:~# cat /proc/net/iet/session
tid:1 name:mytarget

root@ubuntu-precise-beta2:~# cat /proc/net/iet/volume
tid:1 name:mytarget
        lun:0 state:0 iotype:fileio iomode:wt blocks:1048576 blocksize:512 path:/fs.iscsi.disk

successfully lets you delete target as device is not in use:

root@ubuntu-precise-beta2:~# ietadm --op delete --tid=1

no longer shows active target or sessions:

root@ubuntu-precise-beta2:~# cat /proc/net/iet/volume
root@ubuntu-precise-beta2:~# cat /proc/net/iet/session