[DO NOT MERGE, discussions only] refresh on delete backstore #170
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Problem: ------- [root@server1 ~]# targetcli [11/1366] targetcli shell version 2.1.51 Copyright 2011-2013 by Datera, Inc and others. For help on commands, type 'help'. /> backstores/fileio create name=disk file_or_dev=/tmp/iscsidisk size=1G /tmp/iscsidisk exists, using its size (1073741824 bytes) instead Created fileio disk with size 1073741824 /> iscsi/ create Created target iqn.2003-01.org.linux-iscsi.server1.x8664:sn.5679adc37869. Created TPG 1. /> iscsi/iqn.2003-01.org.linux-iscsi.server1.x8664:sn.5679adc37869/tpg1/luns create /backstores/fileio/disk Created LUN 0. /> ls o- / .............................................................. [...] o- backstores ................................................... [...] | o- block ...................................................... [Storage Objects: 0] | o- fileio ..................................................... [Storage Objects: 1] | | o- disk ..................................................... [/tmp/iscsidisk (1.0GiB) write-back activated] | | o- alua ................................................... [ALUA Groups: 1] | | o- default_tg_pt_gp ..................................... [ALUA state: Active/optimized] | o- pscsi ...................................................... [Storage Objects: 0] | o- ramdisk .................................................... [Storage Objects: 0] | o- user:glfs .................................................. [Storage Objects: 0] o- iscsi ........................................................ [Targets: 1] | o- iqn.2003-01.org.linux-iscsi.server1.x8664:sn.5679adc37869 .. [TPGs: 1] | o- tpg1 ..................................................... [disabled] | o- acls ................................................... [ACLs: 0] | o- luns ................................................... [LUNs: 1] | | o- lun0 ................................................. [fileio/disk (/tmp/iscsidisk) (default_tg_pt_gp)] | o- portals ................................................ [Portals: 0] o- loopback ..................................................... [Targets: 0] o- vhost ........................................................ [Targets: 0] o- xen-pvscsi ................................................... [Targets: 0] /> backstores/fileio/ delete disk Deleted storage object disk. /> ls This LUN does not exist in configFS /> Fix: --- Refresh at the end of ui_command_delete() Credits to: * Jing Yan [[email protected]] who initially reported this issue. * Matt Coleman [@iammattcoleman] for bringing attention on this issue. * Maurizio Lombardi [@maurizio-lombardi] for reproducer. Fixes: BZ#1571728 Signed-off-by: Prasanna Kumar Kalever <[email protected]>
| rn._save_backups(default_save_file) | ||
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| child.rtsnode.delete(save=save) | ||
| self.remove_child(child) | ||
| rn.ui_command_refresh() |
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Refreshing the entire root node works, but it can be a very heavy operation. I'll have a pull request that only refreshes the affected nodes in a couple hours.
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So Quick!!
I get you, you have a point.
Sure, if you are already working on it, I will wait for the patch then.
Thanks!
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@iammattcoleman I was also wondering if this is a valid use case of targetcli ?
Generally, the right order is to delete the target first and then delete the backstore.
We anyway have refresh command for targetcli:
[root@server1 ~]# targetcli [11/1366]
targetcli shell version 2.1.51
Copyright 2011-2013 by Datera, Inc and others.
For help on commands, type 'help'.
/> backstores/fileio create name=disk file_or_dev=/tmp/iscsidisk size=1G
/tmp/iscsidisk exists, using its size (1073741824 bytes) instead
Created fileio disk with size 1073741824
/> iscsi/ create
Created target iqn.2003-01.org.linux-iscsi.server1.x8664:sn.5679adc37869.
Created TPG 1.
/> iscsi/iqn.2003-01.org.linux-iscsi.server1.x8664:sn.5679adc37869/tpg1/luns create /backstores/fileio/disk
Created LUN 0.
/> ls
o- / ...................................................................... [...]
o- backstores ........................................................... [...]
| o- block .............................................................. [Storage Objects: 0]
| o- fileio ............................................................. [Storage Objects: 1]
| | o- disk ............................................................. [/tmp/iscsidisk (1.0GiB) write-back activated]
| | o- alua ........................................................... [ALUA Groups: 1]
| | o- default_tg_pt_gp ............................................. [ALUA state: Active/optimized]
| o- pscsi .............................................................. [Storage Objects: 0]
| o- ramdisk ............................................................ [Storage Objects: 0]
| o- user:glfs .......................................................... [Storage Objects: 0]
o- iscsi ................................................................ [Targets: 1]
| o- iqn.2003-01.org.linux-iscsi.server1.x8664:sn.5679adc37869 .......... [TPGs: 1]
| o- tpg1 ............................................................. [disabled]
| o- acls ........................................................... [ACLs: 0]
| o- luns ........................................................... [LUNs: 1]
| | o- lun0 ......................................................... [fileio/disk (/tmp/iscsidisk) (default_tg_pt_gp)]
| o- portals ........................................................ [Portals: 0]
o- loopback ............................................................. [Targets: 0]
o- vhost ................................................................ [Targets: 0]
o- xen-pvscsi ........................................................... [Targets: 0]
/> backstores/fileio/ delete disk
Deleted storage object disk.
/> pwd
/
/> get global auto_use_daemon
auto_use_daemon=false
/> version
targetcli version 2.1.51
/> ls
This LUN does not exist in configFS
/> refresh
/> ls
o- / ..................................................................... [...]
o- backstores .......................................................... [...]
| o- block ............................................................. [Storage Objects: 0]
| o- fileio ............................................................ [Storage Objects: 0]
| o- pscsi ............................................................. [Storage Objects: 0]
| o- ramdisk ........................................................... [Storage Objects: 0]
| o- user:glfs ......................................................... [Storage Objects: 0]
o- iscsi ............................................................... [Targets: 1]
| o- iqn.2003-01.org.linux-iscsi.server1.x8664:sn.5679adc37869 ......... [TPGs: 1]
| o- tpg1 ............................................................ [disabled]
| o- acls .......................................................... [ACLs: 0]
| o- luns .......................................................... [LUNs: 0]
| o- portals ....................................................... [Portals: 0]
o- loopback ............................................................ [Targets: 0]
o- vhost ............................................................... [Targets: 0]
o- xen-pvscsi .......................................................... [Targets: 0]
/>
@iammattcoleman @maurizio-lombardi thoughts?
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@iammattcoleman as you rightly pointed, refresh incurs delay, and having this on every delete might not be an acceptable solution.
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If you manually perform these operations directly in ConfigFS, the kernel removes the LUNs from targets that referenced the backstore. Since it's doing that automatically, I think targetcli should automatically refresh the data for the affected nodes. That way, its behavior is consistent with the kernel's.
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@iammattcoleman excuse me if it feels like jumping the gun, our team is waiting on the new release having the taretclid fixes since a week now, but @maurizio-lombardi seems to be waiting for this one fix. |
pkalever
changed the title
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Problem:
Fix:
Refresh at the end of ui_command_delete()
Credits to:
Fixes: BZ#1571728
Signed-off-by: Prasanna Kumar Kalever <[email protected]>