[libvirt] [PATCH v2.1] qemu_capabilities: introduce QEMU_CAPS_SD_CARD to probe sd-card drivers

[Chen Hanxiao]

From: Chen Hanxiao <chenhanxiao at gmail.com>

This patch introduces QEMU_CAPS_SD_CARD for probing
whether qemu support SD card by:

{"execute": "device-list-properties",
    "arguments":{"typename":"sd-card"}}

It will be helpful for apps which used
cmd 'virsh domcaps` etc.

Also helpful for:
https://bugzilla.redhat.com/show_bug.cgi?id=1387218

Signed-off-by: Chen Hanxiao <chenhanxiao at gmail.com>
---
v2:
   rebased on upstream
v2.1:
   add doc/news.xml description
   rebased on upstream

 docs/news.xml                | 9 +++++++++
 src/qemu/qemu_capabilities.c | 9 +++++++--
 src/qemu/qemu_capabilities.h | 1 +
 3 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/docs/news.xml b/docs/news.xml
index 584c9af..b218463 100644
--- a/docs/news.xml
+++ b/docs/news.xml
@@ -26,6 +26,15 @@
           don't start it with unsupported features.
         </description>
       </change>
+      <change>
+          <summary>
+            qemu_capabilities: introduce QEMU_CAPS_SD_CARD to probe sd-card drivers
+        </summary>
+        <description>
+          The new QEMU capability flag will allow libvirt to probe sd-card
+          drivers.
+        </description>
+      </change>
     </section>
     <section title="Bug fixes">
       <change/>
diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 5694d0b..1828b30 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -359,6 +359,7 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST,
               "query-cpu-model-expansion", /* 245 */
               "virtio-net.host_mtu",
               "spice-rendernode",
+              "sd-card",
     );
 
 
@@ -1626,6 +1627,7 @@ struct virQEMUCapsStringFlags virQEMUCapsObjectTypes[] = {
     { "ivshmem-plain", QEMU_CAPS_DEVICE_IVSHMEM_PLAIN },
     { "ivshmem-doorbell", QEMU_CAPS_DEVICE_IVSHMEM_DOORBELL },
     { "vhost-scsi", QEMU_CAPS_DEVICE_VHOST_SCSI },
+    { "sd-card", QEMU_CAPS_SD_CARD },
 };
 
 static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsVirtioBalloon[] = {
@@ -5425,8 +5427,7 @@ virQEMUCapsFillDomainDeviceDiskCaps(virQEMUCapsPtr qemuCaps,
     VIR_DOMAIN_CAPS_ENUM_SET(disk->bus,
                              VIR_DOMAIN_DISK_BUS_IDE,
                              VIR_DOMAIN_DISK_BUS_SCSI,
-                             VIR_DOMAIN_DISK_BUS_VIRTIO,
-                             /* VIR_DOMAIN_DISK_BUS_SD */);
+                             VIR_DOMAIN_DISK_BUS_VIRTIO);
 
     /* PowerPC pseries based VMs do not support floppy device */
     if (!ARCH_IS_PPC64(qemuCaps->arch) ||
@@ -5435,6 +5436,10 @@ virQEMUCapsFillDomainDeviceDiskCaps(virQEMUCapsPtr qemuCaps,
 
     if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_USB_STORAGE))
         VIR_DOMAIN_CAPS_ENUM_SET(disk->bus, VIR_DOMAIN_DISK_BUS_USB);
+
+    if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_SD_CARD))
+        VIR_DOMAIN_CAPS_ENUM_SET(disk->bus, VIR_DOMAIN_DISK_BUS_SD);
+
     return 0;
 }
 
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index cc9f46e..decca12 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -394,6 +394,7 @@ typedef enum {
     QEMU_CAPS_QUERY_CPU_MODEL_EXPANSION, /* qmp query-cpu-model-expansion */
     QEMU_CAPS_VIRTIO_NET_HOST_MTU, /* virtio-net-*.host_mtu */
     QEMU_CAPS_SPICE_RENDERNODE, /* -spice rendernode */
+    QEMU_CAPS_SD_CARD, /* -sd SD-card.img */
 
     QEMU_CAPS_LAST /* this must always be the last item */
 } virQEMUCapsFlags;
-- 
2.7.4