Re: [libvirt] [PATCHv4 9/9] Auto-add one hub if there are too many USB devices

When parsing a command line with USB devices that have no address specified, QEMU automatically adds a USB hub if the device would fill up all the available USB ports. To help most of the users, add one hub if there are more USB devices than available ports. For wilder configurations, expect the user to provide us with more hubs and/or controllers. --- src/conf/domain_addr.c | 20 +++++++++ src/conf/domain_addr.h | 2 + src/libvirt_private.syms | 1 + src/qemu/qemu_domain_address.c | 48 ++++++++++++++++++++++ .../qemuxml2argv-usb-hub-autoadd.args | 28 +++++++++++++ .../qemuxml2argv-usb-hub-autoadd.xml | 23 +++++++++++ tests/qemuxml2argvtest.c | 3 ++ 7 files changed, 125 insertions(+) create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-usb-hub-autoadd.args create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-usb-hub-autoadd.xml

diff --git a/src/conf/domain_addr.c b/src/conf/domain_addr.c index 491d9c6..0152bbb 100644 --- a/src/conf/domain_addr.c +++ b/src/conf/domain_addr.c @@ -1608,6 +1608,26 @@ virDomainUSBAddressFindFreePort(virDomainUSBAddressHubPtr hub, }

+size_t +virDomainUSBAddressCountAvailablePorts(virDomainDefPtr def) +{ + size_t i, ret = 0; + + for (i = 0; i < def->ncontrollers; i++) { + virDomainControllerDefPtr cont = def->controllers[i]; + if (cont->type == VIR_DOMAIN_CONTROLLER_TYPE_USB) + ret += virDomainUSBAddressControllerModelToPorts(cont); + } + + for (i = 0; i < def->nhubs; i++) { + virDomainHubDefPtr hub = def->hubs[i]; + if (hub->type == VIR_DOMAIN_HUB_TYPE_USB) + ret += VIR_DOMAIN_USB_HUB_PORTS; + } + return ret; +} + + static int virDomainUSBAddressAssignFromBus(virDomainUSBAddressSetPtr addrs, virDomainDeviceInfoPtr info, diff --git a/src/conf/domain_addr.h b/src/conf/domain_addr.h index 5a3f935..3f1d654 100644 --- a/src/conf/domain_addr.h +++ b/src/conf/domain_addr.h @@ -277,6 +277,8 @@ int virDomainUSBAddressSetAddHub(virDomainUSBAddressSetPtr addrs, virDomainHubDefPtr hub) ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2); +size_t +virDomainUSBAddressCountAvailablePorts(virDomainDefPtr def); void virDomainUSBAddressSetFree(virDomainUSBAddressSetPtr addrs); int diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index e23bfe3..8358442 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -108,6 +108,7 @@ virDomainPCIAddressSlotInUse; virDomainPCIAddressValidate; virDomainPCIControllerModelToConnectType; virDomainUSBAddressAssign; +virDomainUSBAddressCountAvailablePorts; virDomainUSBAddressEnsure; virDomainUSBAddressPortFormat; virDomainUSBAddressPortFormatBuf; diff --git a/src/qemu/qemu_domain_address.c b/src/qemu/qemu_domain_address.c index c18182a..39c7d19 100644 --- a/src/qemu/qemu_domain_address.c +++ b/src/qemu/qemu_domain_address.c @@ -1679,6 +1679,51 @@ qemuDomainAssignUSBPorts(virDomainUSBAddressSetPtr addrs, static int +qemuDomainAssignUSBPortsCounter(virDomainDeviceInfoPtr info ATTRIBUTE_UNUSED, + void *opaque) +{ + struct qemuAssignUSBIteratorInfo *data = opaque; + + data->count++; + return 0; +} + + +static int +qemuDomainUSBAddressAddHubs(virDomainDefPtr def) +{ + struct qemuAssignUSBIteratorInfo data = { .count = 0 }; + virDomainHubDefPtr hub = NULL; + size_t available_ports; + int ret = -1; + + available_ports = virDomainUSBAddressCountAvailablePorts(def); + ignore_value(virDomainUSBDeviceDefForeach(def, + qemuDomainAssignUSBPortsCounter, + &data, + false)); + VIR_DEBUG("Found %zu USB devices and %zu provided USB ports", + data.count, available_ports); + + /* Add one hub if there are more devices than ports + * otherwise it's up to the user to specify more hubs/controllers */

+ if (data.count > available_ports) { + if (VIR_ALLOC(hub) < 0) + return -1; + hub->type = VIR_DOMAIN_HUB_TYPE_USB; + + if (VIR_APPEND_ELEMENT(def->hubs, def->nhubs, hub) < 0) + goto cleanup; + } + + ret = 0; + cleanup: + VIR_FREE(hub); + return ret; +} + + +static int qemuDomainAssignUSBAddresses(virDomainDefPtr def, virDomainObjPtr obj) { @@ -1689,6 +1734,9 @@ qemuDomainAssignUSBAddresses(virDomainDefPtr def, if (!(addrs = virDomainUSBAddressSetCreate())) goto cleanup; + if (qemuDomainUSBAddressAddHubs(def) < 0) + goto cleanup; + if (virDomainUSBAddressSetAddControllers(addrs, def) < 0) goto cleanup; diff --git a/tests/qemuxml2argvdata/qemuxml2argv-usb-hub-autoadd.args b/tests/qemuxml2argvdata/qemuxml2argv-usb-hub-autoadd.args new file mode 100644 index 0000000..12c9691 --- /dev/null +++ b/tests/qemuxml2argvdata/qemuxml2argv-usb-hub-autoadd.args @@ -0,0 +1,28 @@ +LC_ALL=C \ +PATH=/bin \ +HOME=/home/test \ +USER=test \ +LOGNAME=test \ +QEMU_AUDIO_DRV=none \ +/usr/bin/qemu \ +-name QEMUGuest1 \ +-S \ +-M pc \ +-m 214 \ +-smp 1 \

+-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \ +-nographic \ +-nodefconfig \ +-nodefaults \ +-chardev socket,id=charmonitor,path=/tmp/lib/domain--1-QEMUGuest1/monitor.sock,\ +server,nowait \ +-mon chardev=charmonitor,id=monitor,mode=readline \ +-no-acpi \ +-boot c \ +-usb \ +-device usb-hub,id=hub0,bus=usb.0,port=1 \ +-device usb-mouse,id=input0,bus=usb.0,port=2 \ +-device usb-mouse,id=input1,bus=usb.0,port=1.1 \ +-device usb-mouse,id=input2,bus=usb.0,port=1.2 \ +-device usb-tablet,id=input3,bus=usb.0,port=1.3 \ +-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3 diff --git a/tests/qemuxml2argvdata/qemuxml2argv-usb-hub-autoadd.xml b/tests/qemuxml2argvdata/qemuxml2argv-usb-hub-autoadd.xml new file mode 100644 index 0000000..43e0f1f --- /dev/null +++ b/tests/qemuxml2argvdata/qemuxml2argv-usb-hub-autoadd.xml @@ -0,0 +1,23 @@ +<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'/> + <input type='mouse' bus='usb'> + </input> + <input type='mouse' bus='usb'> + </input> + <input type='mouse' bus='usb'> + </input> + <input type='tablet' bus='usb'/> + </devices> +</domain> diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c index a872ba8..5bbd6e3 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("usb-hub-autoadd", + 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);