[libvirt] [PATCHv4 6/9] Reserve existing USB addresses
John Ferlan
jferlan at redhat.com
Thu Jul 14 11:29:49 UTC 2016
On 07/01/2016 11:38 AM, Ján Tomko wrote:
> 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)) {
FWIW: Earlier comment I made in review of 3/9 about using portmap makes
something like this a bit more readable, IMO.
> + 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);
There's only 2 arguments.
> #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;
Corresponding change in qemuDomainObjPrivateFree needs to be made.
> + 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;
> }
>
Shouldn't qemuDomainReleaseDeviceAddress handle info->type ==
VIR_DOMAIN_DEVICE_ADDRESS_TYPE_USB?
At the very least when hotplug comes along and something is unplugged,
I'd expect the address being used to be free'd up. Maybe that's later,
but since the function views the priv->{ccw|pci|vioserial}addrs, the
usbaddrs should also be considered.
ACK with the appropriate adjustments (two free calls and adjustment to
prototype ATTRIBUTE_NONNULL.
John
> 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);
>
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