utils: storage: Mark that a virStorageSource is going to be used as a floppy

Add a flag denoting that a virStorageSource is going to be used as a
floppy image. This will be useful in cases where the user passes in
files which shall be exposed as an image to the guest.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>

src/qemu/qemu_domain.c

@@ -11852,6 +11852,9 @@ qemuDomainPrepareDiskSourceChain(virDomainDiskDefPtr disk,
         n->iomode = disk->iomode;
         n->cachemode = disk->cachemode;
         n->discard = disk->discard;
+
+        if (disk->device == VIR_DOMAIN_DISK_DEVICE_FLOPPY)
+            n->floppyimg = true;
     }
 
     return 0;

src/util/virstoragefile.h

@@ -313,6 +313,9 @@ struct _virStorageSource {
     int cachemode; /* enum virDomainDiskCache */
     int discard; /* enum virDomainDiskDiscard */
     int detect_zeroes; /* enum virDomainDiskDetectZeroes */
+
+    bool floppyimg; /* set to true if the storage source is going to be used
+                       as a source for floppy drive */
 };