[libvirt] [PATCH 1/2] qemu: Add capability flag for usb-storage

[Fred A. Kemp]

From: "Fred A. Kemp" <anonym at lavabit.com>

Allow use of the usb-storage device only if the new capability flag
QEMU_CAPS_DEVICE_USB_STORAGE is set, which it is for qemu(-kvm)
versions >= 0.12.1.2-rhel62-beta.
---
 src/qemu/qemu_capabilities.c |    2 ++
 src/qemu/qemu_capabilities.h |    1 +
 src/qemu/qemu_command.c      |    6 +++---
 tests/qemuhelptest.c         |   18 ++++++++++++------
 tests/qemuxml2argvtest.c     |    3 ++-
 5 files changed, 20 insertions(+), 10 deletions(-)

diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 5dc3c9e..20deda0 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -234,6 +234,7 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST,
 
               "vnc-share-policy", /* 150 */
               "device-del-event",
+              "usb-storage",
     );
 
 struct _virQEMUCaps {
@@ -1383,6 +1384,7 @@ struct virQEMUCapsStringFlags virQEMUCapsObjectTypes[] = {
     { "pci-bridge", QEMU_CAPS_DEVICE_PCI_BRIDGE },
     { "vfio-pci", QEMU_CAPS_DEVICE_VFIO_PCI },
     { "scsi-generic", QEMU_CAPS_DEVICE_SCSI_GENERIC },
+    { "usb-storage", QEMU_CAPS_DEVICE_USB_STORAGE },
 };
 
 static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsVirtioBlk[] = {
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index f5f685d..245b90b 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -190,6 +190,7 @@ enum virQEMUCapsFlags {
     QEMU_CAPS_MLOCK              = 149, /* -realtime mlock=on|off */
     QEMU_CAPS_VNC_SHARE_POLICY   = 150, /* set display sharing policy */
     QEMU_CAPS_DEVICE_DEL_EVENT   = 151, /* DEVICE_DELETED event */
+    QEMU_CAPS_DEVICE_USB_STORAGE = 152, /* -device usb-storage */
 
     QEMU_CAPS_LAST,                   /* this must always be the last item */
 };
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index d0aed7c..b658d22 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -7433,10 +7433,10 @@ qemuBuildCommandLine(virConnectPtr conn,
             bool withDeviceArg = false;
             bool deviceFlagMasked = false;
 
-            /* Unless we have -device, then USB disks need special
-               handling */
+            /* Unless we have `-device usb-storage`, then USB disks
+               need special handling */
             if ((disk->bus == VIR_DOMAIN_DISK_BUS_USB) &&
-                !virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE)) {
+                !virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_USB_STORAGE)) {
                 if (disk->device == VIR_DOMAIN_DISK_DEVICE_DISK) {
                     virCommandAddArg(cmd, "-usbdevice");
                     virCommandAddArgFormat(cmd, "disk:%s", disk->src);
diff --git a/tests/qemuhelptest.c b/tests/qemuhelptest.c
index d2fd794..cfb2c94 100644
--- a/tests/qemuhelptest.c
+++ b/tests/qemuhelptest.c
@@ -514,7 +514,8 @@ mymain(void)
             QEMU_CAPS_DEVICE_USB_SERIAL,
             QEMU_CAPS_DEVICE_USB_NET,
             QEMU_CAPS_DEVICE_PCI_BRIDGE,
-            QEMU_CAPS_DEVICE_SCSI_GENERIC);
+            QEMU_CAPS_DEVICE_SCSI_GENERIC,
+            QEMU_CAPS_DEVICE_USB_STORAGE);
     DO_TEST("qemu-kvm-0.12.1.2-rhel61", 12001, 1, 0,
             QEMU_CAPS_VNC_COLON,
             QEMU_CAPS_NO_REBOOT,
@@ -653,7 +654,8 @@ mymain(void)
             QEMU_CAPS_DEVICE_QXL,
             QEMU_CAPS_DEVICE_VGA,
             QEMU_CAPS_DEVICE_CIRRUS_VGA,
-            QEMU_CAPS_DEVICE_PCI_BRIDGE);
+            QEMU_CAPS_DEVICE_PCI_BRIDGE,
+            QEMU_CAPS_DEVICE_USB_STORAGE);
     DO_TEST("qemu-1.0", 1000000, 0, 0,
             QEMU_CAPS_VNC_COLON,
             QEMU_CAPS_NO_REBOOT,
@@ -736,7 +738,8 @@ mymain(void)
             QEMU_CAPS_DEVICE_USB_SERIAL,
             QEMU_CAPS_DEVICE_USB_NET,
             QEMU_CAPS_DEVICE_SCSI_GENERIC,
-            QEMU_CAPS_DEVICE_SCSI_GENERIC_BOOTINDEX);
+            QEMU_CAPS_DEVICE_SCSI_GENERIC_BOOTINDEX,
+            QEMU_CAPS_DEVICE_USB_STORAGE);
     DO_TEST("qemu-1.1.0", 1001000, 0, 0,
             QEMU_CAPS_VNC_COLON,
             QEMU_CAPS_NO_REBOOT,
@@ -831,7 +834,8 @@ mymain(void)
             QEMU_CAPS_DEVICE_PCI_BRIDGE,
             QEMU_CAPS_DEVICE_SCSI_GENERIC,
             QEMU_CAPS_DEVICE_SCSI_GENERIC_BOOTINDEX,
-            QEMU_CAPS_VNC_SHARE_POLICY);
+            QEMU_CAPS_VNC_SHARE_POLICY,
+            QEMU_CAPS_DEVICE_USB_STORAGE);
     DO_TEST("qemu-1.2.0", 1002000, 0, 0,
             QEMU_CAPS_VNC_COLON,
             QEMU_CAPS_NO_REBOOT,
@@ -938,7 +942,8 @@ mymain(void)
             QEMU_CAPS_DEVICE_PCI_BRIDGE,
             QEMU_CAPS_DEVICE_SCSI_GENERIC,
             QEMU_CAPS_DEVICE_SCSI_GENERIC_BOOTINDEX,
-            QEMU_CAPS_VNC_SHARE_POLICY);
+            QEMU_CAPS_VNC_SHARE_POLICY,
+            QEMU_CAPS_DEVICE_USB_STORAGE);
     DO_TEST("qemu-kvm-1.2.0", 1002000, 1, 0,
             QEMU_CAPS_VNC_COLON,
             QEMU_CAPS_NO_REBOOT,
@@ -1050,7 +1055,8 @@ mymain(void)
             QEMU_CAPS_DEVICE_PCI_BRIDGE,
             QEMU_CAPS_DEVICE_SCSI_GENERIC,
             QEMU_CAPS_DEVICE_SCSI_GENERIC_BOOTINDEX,
-            QEMU_CAPS_VNC_SHARE_POLICY);
+            QEMU_CAPS_VNC_SHARE_POLICY,
+            QEMU_CAPS_DEVICE_USB_STORAGE);
 
     return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
 }
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index 0f96eef..f6f87d4 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -540,7 +540,8 @@ mymain(void)
             QEMU_CAPS_DRIVE, QEMU_CAPS_DEVICE, QEMU_CAPS_BOOTINDEX);
     DO_TEST("disk-usb",  NONE);
     DO_TEST("disk-usb-device",
-            QEMU_CAPS_DRIVE, QEMU_CAPS_DEVICE, QEMU_CAPS_NODEFCONFIG);
+            QEMU_CAPS_DRIVE, QEMU_CAPS_DEVICE, QEMU_CAPS_DEVICE_USB_STORAGE,
+            QEMU_CAPS_NODEFCONFIG);
     DO_TEST("disk-scsi-device",
             QEMU_CAPS_DRIVE, QEMU_CAPS_DEVICE, QEMU_CAPS_NODEFCONFIG,
             QEMU_CAPS_SCSI_LSI);
-- 
1.7.10.4