tests: qemublock: Add test cases for 'aio' options of 'file' storage

Test that the 'aio' option is applied correctly for the 'file' protocol
backend and across the backing chain.

The top level disk image would generate the following '-drive' cmdline:

file-backing_basic-aio_threads:
-drive file=/var/lib/libvirt/images/a,format=qcow,if=none,id=drive-dummy,aio=threads
-device virtio-blk-pci,scsi=off,drive=drive-dummy,id=dummy

file-raw-aio_native:
-drive file=/path/to/i.img,format=raw,if=none,id=drive-dummy,cache=none,aio=native
-device virtio-blk-pci,scsi=off,drive=drive-dummy,id=dummy,write-cache=on
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>

tests/qemublocktest.c

@@ -417,6 +417,8 @@ mymain(void)
     TEST_DISK_TO_JSON("file-backing_basic-noopts");
     TEST_DISK_TO_JSON("dir-fat-readonly");
     TEST_DISK_TO_JSON("dir-fat-floppy");
+    TEST_DISK_TO_JSON("file-raw-aio_native");
+    TEST_DISK_TO_JSON("file-backing_basic-aio_threads");
 
  cleanup:
     virHashFree(diskxmljsondata.schema);

tests/qemublocktestdata/xml2json/file-backing_basic-aio_threads.json

+{
+  "node-name": "node-a-f",
+  "read-only": false,
+  "driver": "qcow",
+  "file": {
+    "driver": "file",
+    "filename": "/var/lib/libvirt/images/a",
+    "aio": "threads",
+    "node-name": "node-a-s",
+    "read-only": false,
+    "discard": "unmap"
+  },
+  "backing": "node-b-f"
+}
+{
+  "node-name": "node-b-f",
+  "read-only": true,
+  "driver": "qed",
+  "file": {
+    "driver": "file",
+    "filename": "/var/lib/libvirt/images/b",
+    "aio": "threads",
+    "node-name": "node-b-s",
+    "read-only": true,
+    "discard": "unmap"
+  },
+  "backing": "node-c-f"
+}
+{
+  "node-name": "node-c-f",
+  "read-only": true,
+  "driver": "vmdk",
+  "file": {
+    "driver": "gluster",
+    "volume": "images",
+    "path": "c",
+    "server": [
+      {
+        "type": "inet",
+        "host": "test.org",
+        "port": "24007"
+      }
+    ],
+    "node-name": "node-c-s",
+    "read-only": true,
+    "discard": "unmap"
+  },
+  "backing": "node-d-f"
+}
+{
+  "node-name": "node-d-f",
+  "read-only": true,
+  "driver": "raw",
+  "file": {
+    "driver": "file",
+    "filename": "/var/lib/libvirt/images/d",
+    "aio": "threads",
+    "node-name": "node-d-s",
+    "read-only": true,
+    "discard": "unmap"
+  }
+}

tests/qemublocktestdata/xml2json/file-backing_basic-aio_threads.xml

+<disk type='file' device='disk'>
+  <driver name='qemu' type='qcow' io='threads'/>
+  <source file='/var/lib/libvirt/images/a'>
+    <privateData>
+      <nodenames>
+        <nodename type='storage' name='node-a-s'/>
+        <nodename type='format' name='node-a-f'/>
+      </nodenames>
+    </privateData>
+  </source>
+  <backingStore type='file' index='1'>
+    <format type='qed'/>
+    <source file='/var/lib/libvirt/images/b'>
+      <privateData>
+        <nodenames>
+          <nodename type='storage' name='node-b-s'/>
+          <nodename type='format' name='node-b-f'/>
+        </nodenames>
+      </privateData>
+    </source>
+    <backingStore type='network' index='2'>
+      <format type='vmdk'/>
+      <source protocol='gluster' name='images/c'>
+        <host name='test.org'/>
+        <privateData>
+          <nodenames>
+            <nodename type='storage' name='node-c-s'/>
+            <nodename type='format' name='node-c-f'/>
+          </nodenames>
+        </privateData>
+      </source>
+      <backingStore type='file' index='3'>
+        <format type='raw'/>
+        <source file='/var/lib/libvirt/images/d'>
+          <privateData>
+            <nodenames>
+              <nodename type='storage' name='node-d-s'/>
+              <nodename type='format' name='node-d-f'/>
+            </nodenames>
+          </privateData>
+        </source>
+        <backingStore/>
+      </backingStore>
+    </backingStore>
+  </backingStore>
+  <target dev='vda'/>
+</disk>

tests/qemublocktestdata/xml2json/file-raw-aio_native.json

+{
+  "node-name": "test1",
+  "read-only": false,
+  "cache": {
+    "direct": true,
+    "no-flush": false
+  },
+  "driver": "raw",
+  "file": {
+    "driver": "file",
+    "filename": "/path/to/i.img",
+    "aio": "native",
+    "node-name": "test2",
+    "cache": {
+      "direct": true,
+      "no-flush": false
+    },
+    "read-only": false,
+    "discard": "unmap"
+  }
+}

tests/qemublocktestdata/xml2json/file-raw-aio_native.xml

+<disk device='disk'>
+  <driver name='qemu' type='raw' io='native' cache='none'/>
+  <source file='/path/to/i.img'>
+    <privateData>
+      <nodenames>
+        <nodename type='storage' name='test2'/>
+        <nodename type='format' name='test1'/>
+      </nodenames>
+    </privateData>
+  </source>
+  <target dev='vda'/>
+</disk>