Re: ErrorRecoveryLevel Set as read-only Randomly.

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Hi Arshad,

On Wed, 2014-04-09 at 14:51 +0530, Arshad Hussain wrote:
> Hi Nab,
> 
> Randomly my targetcli sets 'ErrorRecoveyLevel' as read only.
> I have checked the configfs and debugfs they are both mounted
> with permission of read and write. What surprises me is that
> the ERL and default_erl under 'tpg1' is fine. It is only the
> ERL parameter under 'acls/iqn...' which is marked read-only.
> 
> Could you comment on this please ? Is there a work-around to
> get over this issue?
> 
> I have provided the details below. Please let me know if there any
> other info you require?
> 
> Thanks,
> Arshad
> 
> <snip>
> /iscsi/iqn.20...t:981fc286f48> get parameter ErrorRecoveryLevel
> ErrorRecoveryLevel=No Active iSCSI Session [ro]
> /iscsi/iqn.20...t:981fc286f48> set parameter ErrorRecoveryLevel=2
> Parameter ErrorRecoveryLevel is read-only.
> /iscsi/iqn.20...t:981fc286f48>
> 
> /iscsi/iqn.20...t:981fc286f48> get attribute default_erl
> default_erl=2
> /iscsi/iqn.20...t:981fc286f48>
> 
> /iscsi/iqn.20...093081c0/tpg1> pwd
> /iscsi/iqn.2003-01.org.linux-iscsi.wfs.x8664:sn.a6fd093081c0/tpg1
> /iscsi/iqn.20...093081c0/tpg1> get parameter ErrorRecoveryLevel
> ErrorRecoveryLevel=2
> /iscsi/iqn.20...093081c0/tpg1> get attribute default_erl
> default_erl=2
> /iscsi/iqn.20...093081c0/tpg1>
> 
> # Output from /sys/kernel/config
> [root@wfsc its]# cat
> /sys/kernel/config/target/iscsi/iqn.2003-01.org.linux-iscsi.wfs.x8664\:sn.a6fd093081c0/tpgt_1/acls/iqn.1994-05.com.redhat\:981fc286f48/param/ErrorRecoveryLevel
> No Active iSCSI Session
> [root@wfsc its]#
> 
> [root@wfsc log]# mount | grep configfs
> configfs on /sys/kernel/config type configfs (rw,relatime)
> [root@wfsc log]# mount | grep debugfs
> none on /sys/kernel/debug type debugfs (rw,relatime)
> [root@wfsc log]#
> 
> [root@wfsc log]# rpm -q --whatprovides /usr/bin/targetcli
> targetcli-2.1.fb30-1.fc18.noarch
> 
> [root@wfsc log]# cat /etc/issue
> Fedora release 18 (Spherical Cow)
> Kernel \r on an \m (\l)
> [root@wfsc log]#
> 
> [root@wfsc log]# uname -a
> Linux wfsc 3.14.0-rc6 #1 SMP Mon Mar 17 09:07:33 EDT 2014 x86_64 x86_64
> x86_64 GNU/Linux
> [root@wfsc log]#
> 

I'm not able to reproduce using upstream targetcli code, so I can only
assume it's some -fb specific breakage.  CC'ing Grover.

--nab

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