[PATCH 5/6] qemu: Detect whether a SCSI hostdev is a cdrom
Peter Krempa
pkrempa at redhat.com
Thu Oct 15 15:25:13 UTC 2020
QEMU has a special blockdev backend for a cdrom called 'host_cdrom'. Use
it for SCSI hostdevs so that guests can detect the cdrom properly.
For testing purposes we format a cdrom if the fake adapter name is
"cdrom".
Signed-off-by: Peter Krempa <pkrempa at redhat.com>
---
src/qemu/qemu_process.c | 4 ++++
.../hostdev-scsi-virtio-scsi.x86_64-2.8.0.args | 3 +++
.../hostdev-scsi-virtio-scsi.x86_64-4.1.0.args | 3 +++
.../hostdev-scsi-virtio-scsi.x86_64-latest.args | 4 ++++
tests/qemuxml2argvdata/hostdev-scsi-virtio-scsi.xml | 8 ++++++++
tests/qemuxml2argvtest.c | 7 ++++++-
tests/qemuxml2xmloutdata/hostdev-scsi-virtio-scsi.xml | 8 ++++++++
7 files changed, 36 insertions(+), 1 deletion(-)
diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index 70b8d39db9..6e6073c0e1 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -6233,6 +6233,10 @@ qemuProcessPrepareHostHostdev(virDomainHostdevDefPtr hostdev)
return -1;
src->path = g_strdup_printf("/dev/%s", devstr);
+
+ if (virFileIsCDROM(src->path) == 1)
+ src->hostcdrom = true;
+
break;
}
diff --git a/tests/qemuxml2argvdata/hostdev-scsi-virtio-scsi.x86_64-2.8.0.args b/tests/qemuxml2argvdata/hostdev-scsi-virtio-scsi.x86_64-2.8.0.args
index bb8a466f70..03ed12912e 100644
--- a/tests/qemuxml2argvdata/hostdev-scsi-virtio-scsi.x86_64-2.8.0.args
+++ b/tests/qemuxml2argvdata/hostdev-scsi-virtio-scsi.x86_64-2.8.0.args
@@ -58,5 +58,8 @@ drive=drive-hostdev4,id=hostdev4 \
3260/iqn.1992-01.com.example%3Astorage/2,if=none,format=raw,id=drive-hostdev5 \
-device scsi-generic,bus=scsi0.0,channel=0,scsi-id=3,lun=5,\
drive=drive-hostdev5,id=hostdev5 \
+-drive file=/dev/sr0,if=none,format=raw,id=drive-hostdev6,readonly=on \
+-device scsi-generic,bus=scsi0.0,channel=0,scsi-id=4,lun=5,\
+drive=drive-hostdev6,id=hostdev6 \
-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3 \
-msg timestamp=on
diff --git a/tests/qemuxml2argvdata/hostdev-scsi-virtio-scsi.x86_64-4.1.0.args b/tests/qemuxml2argvdata/hostdev-scsi-virtio-scsi.x86_64-4.1.0.args
index 973ae5677a..5aaf2a9ea2 100644
--- a/tests/qemuxml2argvdata/hostdev-scsi-virtio-scsi.x86_64-4.1.0.args
+++ b/tests/qemuxml2argvdata/hostdev-scsi-virtio-scsi.x86_64-4.1.0.args
@@ -70,6 +70,9 @@ file.initiator-name=iqn.2020-07.com.example:test,if=none,format=raw,\
id=drive-hostdev5 \
-device scsi-generic,bus=scsi0.0,channel=0,scsi-id=3,lun=5,\
drive=drive-hostdev5,id=hostdev5 \
+-drive file=/dev/sr0,if=none,format=raw,id=drive-hostdev6,readonly=on \
+-device scsi-generic,bus=scsi0.0,channel=0,scsi-id=4,lun=5,\
+drive=drive-hostdev6,id=hostdev6 \
-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3 \
-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,\
resourcecontrol=deny \
diff --git a/tests/qemuxml2argvdata/hostdev-scsi-virtio-scsi.x86_64-latest.args b/tests/qemuxml2argvdata/hostdev-scsi-virtio-scsi.x86_64-latest.args
index c00ef41bf2..b26fbe36ff 100644
--- a/tests/qemuxml2argvdata/hostdev-scsi-virtio-scsi.x86_64-latest.args
+++ b/tests/qemuxml2argvdata/hostdev-scsi-virtio-scsi.x86_64-latest.args
@@ -76,6 +76,10 @@ keyid=masterKey0,iv=AAECAwQFBgcICQoLDA0ODw==,format=base64 \
"node-name":"libvirt-8-backend","read-only":false}' \
-device scsi-generic,bus=scsi0.0,channel=0,scsi-id=3,lun=5,\
drive=libvirt-8-backend,id=hostdev5 \
+-blockdev '{"driver":"host_cdrom","filename":"/dev/sr0",\
+"node-name":"libvirt-9-backend","read-only":true}' \
+-device scsi-generic,bus=scsi0.0,channel=0,scsi-id=4,lun=5,\
+drive=libvirt-9-backend,id=hostdev6 \
-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3 \
-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,\
resourcecontrol=deny \
diff --git a/tests/qemuxml2argvdata/hostdev-scsi-virtio-scsi.xml b/tests/qemuxml2argvdata/hostdev-scsi-virtio-scsi.xml
index d096e0cb28..9374acef90 100644
--- a/tests/qemuxml2argvdata/hostdev-scsi-virtio-scsi.xml
+++ b/tests/qemuxml2argvdata/hostdev-scsi-virtio-scsi.xml
@@ -82,6 +82,14 @@
</source>
<address type='drive' controller='0' bus='0' target='3' unit='5'/>
</hostdev>
+ <hostdev mode='subsystem' type='scsi' managed='yes'>
+ <source>
+ <adapter name='cdrom'/>
+ <address bus='0' target='0' unit='0'/>
+ </source>
+ <readonly/>
+ <address type='drive' controller='0' bus='0' target='4' unit='5'/>
+ </hostdev>
<memballoon model='virtio'/>
</devices>
</domain>
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index 3c1bec804a..3db4824a26 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -419,7 +419,12 @@ testCompareXMLToArgvCreateArgs(virQEMUDriverPtr drv,
switch ((virDomainHostdevSCSIProtocolType) scsisrc->protocol) {
case VIR_DOMAIN_HOSTDEV_SCSI_PROTOCOL_TYPE_NONE:
- scsisrc->u.host.src->path = g_strdup("/dev/sg0");
+ if (STREQ(scsisrc->u.host.adapter, "cdrom")) {
+ scsisrc->u.host.src->path = g_strdup("/dev/sr0");
+ scsisrc->u.host.src->hostcdrom = true;
+ } else {
+ scsisrc->u.host.src->path = g_strdup("/dev/sg0");
+ }
break;
case VIR_DOMAIN_HOSTDEV_SCSI_PROTOCOL_TYPE_ISCSI:
diff --git a/tests/qemuxml2xmloutdata/hostdev-scsi-virtio-scsi.xml b/tests/qemuxml2xmloutdata/hostdev-scsi-virtio-scsi.xml
index 3e2e21dc55..6f6899c114 100644
--- a/tests/qemuxml2xmloutdata/hostdev-scsi-virtio-scsi.xml
+++ b/tests/qemuxml2xmloutdata/hostdev-scsi-virtio-scsi.xml
@@ -89,6 +89,14 @@
</source>
<address type='drive' controller='0' bus='0' target='3' unit='5'/>
</hostdev>
+ <hostdev mode='subsystem' type='scsi' managed='yes'>
+ <source>
+ <adapter name='cdrom'/>
+ <address bus='0' target='0' unit='0'/>
+ </source>
+ <readonly/>
+ <address type='drive' controller='0' bus='0' target='4' unit='5'/>
+ </hostdev>
<memballoon model='virtio'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
</memballoon>
--
2.26.2
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