qemu: caps: Add capability for 'share-rw' disk option

'share-rw' for the disk device configures qemu to allow concurrent
access to the backing storage.

The capability is checked in various supported disk frontend buses since
it does not make sense to partially backport it.

src/qemu/qemu_capabilities.c

@@ -450,6 +450,7 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST,
               /* 275 */
               "sclplmconsole",
               "numa.dist",
+              "disk-share-rw",
     );
 
 
@@ -1694,6 +1695,7 @@ static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsVirtioBlk[] = {
     { "scsi", QEMU_CAPS_VIRTIO_BLK_SCSI },
     { "logical_block_size", QEMU_CAPS_BLOCKIO },
     { "num-queues", QEMU_CAPS_VIRTIO_BLK_NUM_QUEUES },
+    { "share-rw", QEMU_CAPS_DISK_SHARE_RW },
 };
 
 static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsVirtioNet[] = {
@@ -1724,10 +1726,12 @@ static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsVfioPCI[] = {
 static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsSCSIDisk[] = {
     { "channel", QEMU_CAPS_SCSI_DISK_CHANNEL },
     { "wwn", QEMU_CAPS_SCSI_DISK_WWN },
+    { "share-rw", QEMU_CAPS_DISK_SHARE_RW },
 };
 
 static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsIDEDrive[] = {
     { "wwn", QEMU_CAPS_IDE_DRIVE_WWN },
+    { "share-rw", QEMU_CAPS_DISK_SHARE_RW },
 };
 
 static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsPiix4PM[] = {
@@ -1758,6 +1762,7 @@ static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsQ35PCIHost[] = {
 
 static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsUSBStorage[] = {
     { "removable", QEMU_CAPS_USB_STORAGE_REMOVABLE },
+    { "share-rw", QEMU_CAPS_DISK_SHARE_RW },
 };
 
 static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsKVMPit[] = {

src/qemu/qemu_capabilities.h

@@ -436,6 +436,7 @@ typedef enum {
     /* 275 */
     QEMU_CAPS_DEVICE_SCLPLMCONSOLE, /* -device sclplmconsole */
     QEMU_CAPS_NUMA_DIST, /* -numa dist */
+    QEMU_CAPS_DISK_SHARE_RW, /* share-rw=on for concurrent disk access */
 
     QEMU_CAPS_LAST /* this must always be the last item */
 } virQEMUCapsFlags;

tests/qemucapabilitiesdata/caps_2.10.0-gicv2.aarch64.xml

@@ -181,6 +181,7 @@
   <flag name='vxhs'/>
   <flag name='virtio-blk.num-queues'/>
   <flag name='numa.dist'/>
+  <flag name='disk-share-rw'/>
   <version>2010000</version>
   <kvmVersion>0</kvmVersion>
   <package> (v2.10.0)</package>

tests/qemucapabilitiesdata/caps_2.10.0-gicv3.aarch64.xml

@@ -181,6 +181,7 @@
   <flag name='vxhs'/>
   <flag name='virtio-blk.num-queues'/>
   <flag name='numa.dist'/>
+  <flag name='disk-share-rw'/>
   <version>2010000</version>
   <kvmVersion>0</kvmVersion>
   <package> (v2.10.0)</package>

tests/qemucapabilitiesdata/caps_2.10.0.ppc64.xml

@@ -180,6 +180,7 @@
   <flag name='machine.pseries.resize-hpt'/>
   <flag name='spapr-vty'/>
   <flag name='numa.dist'/>
+  <flag name='disk-share-rw'/>
   <version>2010000</version>
   <kvmVersion>0</kvmVersion>
   <package> (v2.10.0)</package>

tests/qemucapabilitiesdata/caps_2.10.0.s390x.xml

@@ -143,6 +143,7 @@
   <flag name='virtio-blk.num-queues'/>
   <flag name='sclplmconsole'/>
   <flag name='numa.dist'/>
+  <flag name='disk-share-rw'/>
   <version>2010000</version>
   <kvmVersion>0</kvmVersion>
   <package></package>

tests/qemucapabilitiesdata/caps_2.10.0.x86_64.xml

@@ -225,6 +225,7 @@
   <flag name='vxhs'/>
   <flag name='virtio-blk.num-queues'/>
   <flag name='numa.dist'/>
+  <flag name='disk-share-rw'/>
   <version>2010000</version>
   <kvmVersion>0</kvmVersion>
   <package> (v2.10.0)</package>

tests/qemucapabilitiesdata/caps_2.9.0.ppc64.xml

@@ -174,6 +174,7 @@
   <flag name='virtio-gpu.max_outputs'/>
   <flag name='virtio-blk.num-queues'/>
   <flag name='spapr-vty'/>
+  <flag name='disk-share-rw'/>
   <version>2009000</version>
   <kvmVersion>0</kvmVersion>
   <package> (v2.9.0)</package>

tests/qemucapabilitiesdata/caps_2.9.0.s390x.xml

@@ -139,6 +139,7 @@
   <flag name='virtio-gpu.max_outputs'/>
   <flag name='virtio-blk.num-queues'/>
   <flag name='sclplmconsole'/>
+  <flag name='disk-share-rw'/>
   <version>2009000</version>
   <kvmVersion>0</kvmVersion>
   <package></package>

tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml

@@ -221,6 +221,7 @@
   <flag name='chardev-reconnect'/>
   <flag name='virtio-gpu.max_outputs'/>
   <flag name='virtio-blk.num-queues'/>
+  <flag name='disk-share-rw'/>
   <version>2009000</version>
   <kvmVersion>0</kvmVersion>
   <package> (v2.9.0)</package>