[libvirt] [PATCHv4 6/9] Reserve existing USB addresses
Ján Tomko
jtomko at redhat.com
Fri Jul 1 15:38:12 UTC 2016
Check if they fit on the USB controllers the domain has,
and error out if two devices try to use the same address.
---
src/conf/domain_addr.c | 42 ++++++++++++++++++++++
src/conf/domain_addr.h | 4 +++
src/libvirt_private.syms | 1 +
src/qemu/qemu_domain.h | 1 +
src/qemu/qemu_domain_address.c | 38 +++++++++++++++++++-
.../qemuxml2argv-usb-hub-conflict.xml | 22 ++++++++++++
tests/qemuxml2argvtest.c | 3 ++
7 files changed, 110 insertions(+), 1 deletion(-)
create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-usb-hub-conflict.xml
diff --git a/src/conf/domain_addr.c b/src/conf/domain_addr.c
index 2c511ba..bc9dc59 100644
--- a/src/conf/domain_addr.c
+++ b/src/conf/domain_addr.c
@@ -1566,3 +1566,45 @@ int virDomainUSBAddressSetAddControllers(virDomainUSBAddressSetPtr addrs,
}
return 0;
}
+
+
+int
+virDomainUSBAddressReserve(virDomainDeviceInfoPtr info,
+ void *data)
+{
+ virDomainUSBAddressSetPtr addrs = data;
+ virDomainUSBAddressHubPtr targetHub = NULL;
+ char *portStr = NULL;
+ int ret = -1;
+ int targetPort;
+
+ if (info->type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_USB)
+ return 0;
+
+ if (!virDomainUSBAddressPortIsValid(info->addr.usb.port))
+ return 0;
+
+ portStr = virDomainUSBAddressPortFormat(info->addr.usb.port);
+ if (!portStr)
+ goto cleanup;
+ VIR_DEBUG("Reserving USB address bus=%u port=%s", info->addr.usb.bus, portStr);
+
+ if (!(targetHub = virDomainUSBAddressFindPort(addrs, info, &targetPort,
+ portStr)))
+ goto cleanup;
+
+ if (virBitmapIsBitSet(targetHub->ports, targetPort)) {
+ virReportError(VIR_ERR_XML_ERROR,
+ _("Duplicate USB address bus %u port %s"),
+ info->addr.usb.bus, portStr);
+ goto cleanup;
+ }
+
+ ignore_value(virBitmapSetBit(targetHub->ports, targetPort));
+
+ ret = 0;
+
+ cleanup:
+ VIR_FREE(portStr);
+ return ret;
+}
diff --git a/src/conf/domain_addr.h b/src/conf/domain_addr.h
index 4cb0212..4230ea2 100644
--- a/src/conf/domain_addr.h
+++ b/src/conf/domain_addr.h
@@ -275,4 +275,8 @@ int virDomainUSBAddressSetAddControllers(virDomainUSBAddressSetPtr addrs,
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
void virDomainUSBAddressSetFree(virDomainUSBAddressSetPtr addrs);
+int
+virDomainUSBAddressReserve(virDomainDeviceInfoPtr info,
+ void *data)
+ ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3);
#endif /* __DOMAIN_ADDR_H__ */
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index f0fed8e..f66ccf5 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -110,6 +110,7 @@ virDomainPCIControllerModelToConnectType;
virDomainUSBAddressPortFormat;
virDomainUSBAddressPortFormatBuf;
virDomainUSBAddressPortIsValid;
+virDomainUSBAddressReserve;
virDomainUSBAddressSetAddControllers;
virDomainUSBAddressSetCreate;
virDomainUSBAddressSetFree;
diff --git a/src/qemu/qemu_domain.h b/src/qemu/qemu_domain.h
index c87dcc7..b71a28d 100644
--- a/src/qemu/qemu_domain.h
+++ b/src/qemu/qemu_domain.h
@@ -190,6 +190,7 @@ struct _qemuDomainObjPrivate {
virDomainPCIAddressSetPtr pciaddrs;
virDomainCCWAddressSetPtr ccwaddrs;
virDomainVirtioSerialAddrSetPtr vioserialaddrs;
+ virDomainUSBAddressSetPtr usbaddrs;
virQEMUCapsPtr qemuCaps;
char *lockState;
diff --git a/src/qemu/qemu_domain_address.c b/src/qemu/qemu_domain_address.c
index ee44d45..f66b2f0 100644
--- a/src/qemu/qemu_domain_address.c
+++ b/src/qemu/qemu_domain_address.c
@@ -1622,11 +1622,44 @@ qemuDomainAssignPCIAddresses(virDomainDefPtr def,
}
+static int
+qemuDomainAssignUSBAddresses(virDomainDefPtr def,
+ virDomainObjPtr obj)
+{
+ int ret = -1;
+ virDomainUSBAddressSetPtr addrs = NULL;
+ qemuDomainObjPrivatePtr priv = NULL;
+
+ if (!(addrs = virDomainUSBAddressSetCreate()))
+ goto cleanup;
+
+ if (virDomainUSBAddressSetAddControllers(addrs, def) < 0)
+ goto cleanup;
+
+ if (virDomainUSBDeviceDefForeach(def, virDomainUSBAddressReserve, addrs,
+ true) < 0)
+ goto cleanup;
+
+ VIR_DEBUG("Existing USB addresses have been reserved");
+
+ if (obj && obj->privateData) {
+ priv = obj->privateData;
+ priv->usbaddrs = addrs;
+ addrs = NULL;
+ }
+ ret = 0;
+
+ cleanup:
+ virDomainUSBAddressSetFree(addrs);
+ return ret;
+}
+
+
int
qemuDomainAssignAddresses(virDomainDefPtr def,
virQEMUCapsPtr qemuCaps,
virDomainObjPtr obj,
- bool newDomain ATTRIBUTE_UNUSED)
+ bool newDomain)
{
if (qemuDomainAssignVirtioSerialAddresses(def, obj) < 0)
return -1;
@@ -1642,6 +1675,9 @@ qemuDomainAssignAddresses(virDomainDefPtr def,
if (qemuDomainAssignPCIAddresses(def, qemuCaps, obj) < 0)
return -1;
+ if (newDomain && qemuDomainAssignUSBAddresses(def, obj) < 0)
+ return -1;
+
return 0;
}
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-usb-hub-conflict.xml b/tests/qemuxml2argvdata/qemuxml2argv-usb-hub-conflict.xml
new file mode 100644
index 0000000..9a48ba0
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-usb-hub-conflict.xml
@@ -0,0 +1,22 @@
+<domain type='qemu'>
+ <name>QEMUGuest1</name>
+ <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+ <memory unit='KiB'>219136</memory>
+ <currentMemory unit='KiB'>219136</currentMemory>
+ <vcpu placement='static'>1</vcpu>
+ <os>
+ <type arch='i686' machine='pc'>hvm</type>
+ <boot dev='hd'/>
+ </os>
+ <devices>
+ <emulator>/usr/bin/qemu</emulator>
+ <controller type='usb' index='0'/>
+ <memballoon model='virtio'/>
+ <hub type='usb'>
+ <address type='usb' bus='0' port='1'/>
+ </hub>
+ <input type='mouse' bus='usb'>
+ <address type='usb' bus='0' port='1'/>
+ </input>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index 4389e24..9c18989 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -1159,6 +1159,9 @@ mymain(void)
DO_TEST("usb-hub",
QEMU_CAPS_CHARDEV, QEMU_CAPS_USB_HUB,
QEMU_CAPS_NODEFCONFIG);
+ DO_TEST_PARSE_ERROR("usb-hub-conflict",
+ QEMU_CAPS_CHARDEV, QEMU_CAPS_USB_HUB,
+ QEMU_CAPS_NODEFCONFIG);
DO_TEST("usb-port-missing",
QEMU_CAPS_CHARDEV, QEMU_CAPS_USB_HUB,
QEMU_CAPS_NODEFCONFIG);
--
2.7.3
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