[libvirt] [PATCH 12/35] qemu: domain: Store whether a virStorageSource is a host CDROM drive
Use virFileIsCdrom to detect whether a block device is a cdrom drive and
store it in virStorageSource. This will be necessary to correctly create
the 'host_cdrom' backend in qemu when using -blockdev.
We assume that host_cdrom makes only sense when used directly as a raw
image, but if a backing chain would be put in front of it, libvirt will
use 'host_device' in that case.
Signed-off-by: Peter Krempa <pkrempa(a)redhat.com>
---
src/qemu/qemu_domain.c | 8 ++++++++
src/util/virstoragefile.h | 2 ++
2 files changed, 10 insertions(+)
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 9f94809fd1..86e40e13e0 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -7545,6 +7545,14 @@ qemuDomainDetermineDiskChain(virQEMUDriverPtr driver,
VIR_ALLOC(src->backingStore) < 0)
goto cleanup;
+ /* host cdrom requires special treatment in qemu, so we need to check
+ * whether a block device is a cdrom */
+ if (disk->device == VIR_DOMAIN_DISK_DEVICE_CDROM &&
+ src->format == VIR_STORAGE_FILE_RAW &&
+ virStorageSourceIsBlockLocal(src) &&
+ virFileIsCdrom(src->path) == 1)
+ src->hostcdrom = true;
+
ret = 0;
goto cleanup;
}
diff --git a/src/util/virstoragefile.h b/src/util/virstoragefile.h
index 57d39f98c2..c8a4a288b1 100644
--- a/src/util/virstoragefile.h
+++ b/src/util/virstoragefile.h
@@ -316,6 +316,8 @@ struct _virStorageSource {
bool floppyimg; /* set to true if the storage source is going to be used
as a source for floppy drive */
+
+ bool hostcdrom; /* backing device is a cdrom */
};
--
2.16.2