Comment 0 for bug 967984

Using up to date Ubuntu precise (3/28/12) with:

iscsitarget - 1.4.20.2-5ubuntu2
iscsitarget-dkms - 1.4.20.2-5ubuntu2

iSCSI target administration utility appears to not detect inactive sessions correctly.

Replicating bug:

creating a sparse image:

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

then creating target:

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

shows available:

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

root@ubuntu-precise:~# 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:~# 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 shows active session:

root@ubuntu-precise:~# cat /proc/net/iet/session
tid:1 name:mytarget
        sid:281475014263296 initiator:iqn.1993-08.org.debian:01:2f524641a62d
                cid:0 ip:172.16.2.133 state:active hd:none dd:none

ietadm properly shows active and refuses to delete which is expected:

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

client logs out:

root@ubuntu-precise:~# iscsiadm -m session --logout
Logging out of session [sid: 2, target: mytarget, portal: 172.16.2.133,3260]
Logout of [sid: 2, target: mytarget, portal: 172.16.2.133,3260]: successful

no longer shows session active:

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

but ietadm refuses to acknowledge the disconnect and release the target and a ietadm delete fails saying "in use":

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