[libvirt] [PATCHv5 8/8] Auto-add one hub if there are too many USB devices
Ján Tomko
jtomko at redhat.com
Mon Jul 18 16:15:59 UTC 2016
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 365ee40..c3469ee 100644
--- a/src/conf/domain_addr.c
+++ b/src/conf/domain_addr.c
@@ -1604,6 +1604,26 @@ virDomainUSBAddressFindFreePort(virDomainUSBAddressHubPtr hub,
}
+size_t
+virDomainUSBAddressCountAllPorts(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;
+}
+
+
/* Try to find a free port on bus @bus.
*
* Returns 0 on success
diff --git a/src/conf/domain_addr.h b/src/conf/domain_addr.h
index cc36aed..ce94981 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
+virDomainUSBAddressCountAllPorts(virDomainDefPtr def);
void virDomainUSBAddressSetFree(virDomainUSBAddressSetPtr addrs);
int
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index bae0470..466064f 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -108,6 +108,7 @@ virDomainPCIAddressSlotInUse;
virDomainPCIAddressValidate;
virDomainPCIControllerModelToConnectType;
virDomainUSBAddressAssign;
+virDomainUSBAddressCountAllPorts;
virDomainUSBAddressEnsure;
virDomainUSBAddressPortFormat;
virDomainUSBAddressPortFormatBuf;
diff --git a/src/qemu/qemu_domain_address.c b/src/qemu/qemu_domain_address.c
index 7499026..787b357 100644
--- a/src/qemu/qemu_domain_address.c
+++ b/src/qemu/qemu_domain_address.c
@@ -1680,6 +1680,51 @@ 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 = virDomainUSBAddressCountAllPorts(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)
{
@@ -1690,6 +1735,9 @@ 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..7467893
--- /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,sockets=1,cores=1,threads=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 7663700..0fa153c 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -1167,6 +1167,9 @@ 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);
--
2.7.3
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