[libvirt] [PATCH 2/2] qemu: Add enough USB hubs to accomodate all devices
Ján Tomko
jtomko at redhat.com
Fri Jan 27 13:56:12 UTC 2017
Commit 815d98a started auto-adding one hub if there are more USB devices
than available USB ports.
This was a strange choice, since there might be even more devices.
Before USB address allocation was implemented in libvirt, QEMU
automatically added a new USB hub if the old one was full.
Adjust the logic to try adding as many hubs as will be needed
to plug in all the specified devices.
https://bugzilla.redhat.com/show_bug.cgi?id=1410188
---
src/qemu/qemu_domain_address.c | 15 +++++---
.../qemuxml2argv-usb-hub-autoadd-deluxe.args | 42 ++++++++++++++++++++++
.../qemuxml2argv-usb-hub-autoadd-deluxe.xml | 35 ++++++++++++++++++
tests/qemuxml2argvtest.c | 3 ++
4 files changed, 90 insertions(+), 5 deletions(-)
create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-usb-hub-autoadd-deluxe.args
create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-usb-hub-autoadd-deluxe.xml
diff --git a/src/qemu/qemu_domain_address.c b/src/qemu/qemu_domain_address.c
index 9cd1e9e..70482f2 100644
--- a/src/qemu/qemu_domain_address.c
+++ b/src/qemu/qemu_domain_address.c
@@ -2300,19 +2300,24 @@ qemuDomainUSBAddressAddHubs(virDomainDefPtr def)
struct qemuAssignUSBIteratorInfo data = { .count = 0 };
virDomainHubDefPtr hub = NULL;
size_t available_ports;
+ size_t hubs_needed = 0;
int ret = -1;
+ size_t i;
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 (data.count > available_ports)
+ hubs_needed = VIR_DIV_UP(data.count - available_ports + 1,
+ VIR_DOMAIN_USB_HUB_PORTS - 1);
+
+ VIR_DEBUG("Found %zu USB devices and %zu provided USB ports; adding %zu hubs",
+ data.count, available_ports, hubs_needed);
+
+ for (i = 0; i < hubs_needed; i++) {
if (VIR_ALLOC(hub) < 0)
return -1;
hub->type = VIR_DOMAIN_HUB_TYPE_USB;
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-usb-hub-autoadd-deluxe.args b/tests/qemuxml2argvdata/qemuxml2argv-usb-hub-autoadd-deluxe.args
new file mode 100644
index 0000000..552e135
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-usb-hub-autoadd-deluxe.args
@@ -0,0 +1,42 @@
+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-hub,id=hub1,bus=usb.0,port=2 \
+-device usb-hub,id=hub2,bus=usb.0,port=1.1 \
+-device usb-mouse,id=input0,bus=usb.0,port=1.2 \
+-device usb-mouse,id=input1,bus=usb.0,port=1.3 \
+-device usb-mouse,id=input2,bus=usb.0,port=1.4 \
+-device usb-tablet,id=input3,bus=usb.0,port=1.5 \
+-device usb-tablet,id=input4,bus=usb.0,port=1.6 \
+-device usb-tablet,id=input5,bus=usb.0,port=1.7 \
+-device usb-tablet,id=input6,bus=usb.0,port=1.8 \
+-device usb-tablet,id=input7,bus=usb.0,port=1.1.1 \
+-device usb-tablet,id=input8,bus=usb.0,port=1.1.2 \
+-device usb-tablet,id=input9,bus=usb.0,port=1.1.3 \
+-device usb-tablet,id=input10,bus=usb.0,port=1.1.4 \
+-device usb-tablet,id=input11,bus=usb.0,port=1.1.5 \
+-device usb-tablet,id=input12,bus=usb.0,port=1.1.6 \
+-device usb-tablet,id=input13,bus=usb.0,port=1.1.7 \
+-device usb-tablet,id=input14,bus=usb.0,port=1.1.8 \
+-device usb-tablet,id=input15,bus=usb.0,port=2.1 \
+-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-usb-hub-autoadd-deluxe.xml b/tests/qemuxml2argvdata/qemuxml2argv-usb-hub-autoadd-deluxe.xml
new file mode 100644
index 0000000..5787f1a
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-usb-hub-autoadd-deluxe.xml
@@ -0,0 +1,35 @@
+<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'/>
+ <input type='tablet' bus='usb'/>
+ <input type='tablet' bus='usb'/>
+ <input type='tablet' bus='usb'/>
+ <input type='tablet' bus='usb'/>
+ <input type='tablet' bus='usb'/>
+ <input type='tablet' bus='usb'/>
+ <input type='tablet' bus='usb'/>
+ <input type='tablet' bus='usb'/>
+ <input type='tablet' bus='usb'/>
+ <input type='tablet' bus='usb'/>
+ <input type='tablet' bus='usb'/>
+ <input type='tablet' bus='usb'/>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index d0b0cec..3532cb5 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -1332,6 +1332,9 @@ mymain(void)
DO_TEST("usb-hub-autoadd",
QEMU_CAPS_CHARDEV, QEMU_CAPS_USB_HUB,
QEMU_CAPS_NODEFCONFIG);
+ DO_TEST("usb-hub-autoadd-deluxe",
+ 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);
--
2.10.2
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