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Bug 1656362 - when <shareable/> removed from scsi hostdev xml, related chardev's unpriv_sgio not set back to zero.
Summary: when <shareable/> removed from scsi hostdev xml, related chardev's unpriv_sgi...
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: libvirt
Version: 8.0
Hardware: x86_64
OS: Linux
medium
medium
Target Milestone: rc
: 8.0
Assignee: John Ferlan
QA Contact: yisun
URL:
Whiteboard:
Depends On: 1582424 1631733 1656360
Blocks:
TreeView+ depends on / blocked
 
Reported: 2018-12-05 10:38 UTC by yisun
Modified: 2020-11-06 04:11 UTC (History)
12 users (show)

Fixed In Version: libvirt-4.5.0-17.el8
Doc Type: No Doc Update
Doc Text:
undefined
Clone Of: 1656360
Environment:
Last Closed: 2019-06-14 00:53:15 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Comment 1 John Ferlan 2018-12-10 12:50:32 UTC 
POSTed patches to rhvirt-patches as part of the overall unprivileged sgio changes:

(cover) http://post-office.corp.redhat.com/archives/rhvirt-patches/2018-December/msg00205.html

(patches for this bz):
http://post-office.corp.redhat.com/archives/rhvirt-patches/2018-December/msg00206.html
http://post-office.corp.redhat.com/archives/rhvirt-patches/2018-December/msg00204.html
Comment 7 yisun 2019-01-08 10:57:58 UTC 
Verified with:
kernel-4.18.0-58.el8.x86_64
libvirt-4.5.0-17.module+el8+2625+db702f9d.x86_64

1. having a scsi device on host:
[root@dell-per730-58 device]# lsscsi
...
[5:0:0:0]    disk    IBM      2145             0000  /dev/sdb 
...

[root@dell-per730-58 device]# pwd
/sys/block/sdb/device


2. add following xml to vm:
[root@dell-per730-58 device]# virsh dumpxml avocado-vt-vm1 | grep hostdev -A10
    <hostdev mode='subsystem' type='scsi' managed='no' sgio='unfiltered'>
      <source>
        <adapter name='scsi_host5'/>
        <address bus='0' target='0' unit='0'/>
      </source>
      <shareable/>
      <alias name='hostdev0'/>
      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
    </hostdev>

3. start the vm and check the unpriv_sgio value for sdb
[root@dell-per730-58 device]# virsh start avocado-vt-vm1
Domain avocado-vt-vm1 started

[root@dell-per730-58 device]# cat unpriv_sgio 
1

4. remove the <shareable/> tag in hostdev xml, destroy and start the vm again
[root@dell-per730-58 device]# virsh destroy avocado-vt-vm1
Domain avocado-vt-vm1 destroyed

[root@dell-per730-58 device]# virsh edit avocado-vt-vm1
...
    <hostdev mode='subsystem' type='scsi' managed='no' sgio='unfiltered'>
      <source>
        <adapter name='scsi_host5'/>
        <address bus='0' target='0' unit='0'/>
      </source>
      <alias name='hostdev0'/>
      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
    </hostdev>
...

[root@dell-per730-58 device]# virsh start avocado-vt-vm1
Domain avocado-vt-vm1 started

[root@dell-per730-58 device]# cat unpriv_sgio 
0
<===== changed back to 0 when <shareable/> removed, this is expected.
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