July 2018 - Devel - Libvirt List Archives

[libvirt] [PATCH] Fix compile error for stable 1.2.9

by Yang hongyang

Seems a backport miss. An extra member is passed to struct virLXCBasicMountInfo. Signed-off-by: Yang hongyang <hongyang.yang(a)easystack.cn> --- src/lxc/lxc_container.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/src/lxc/lxc_container.c b/src/lxc/lxc_container.c index 28dabec..1c65fa9 100644 --- a/src/lxc/lxc_container.c +++ b/src/lxc/lxc_container.c @@ -760,7 +760,7 @@ typedef struct { static const virLXCBasicMountInfo lxcBasicMounts[] = { { "proc", "/proc", "proc", MS_NOSUID|MS_NOEXEC|MS_NODEV, false, false }, - { "/proc/sys", "/proc/sys", NULL, MS_BIND|MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_RDONLY, false, false, false }, + { "/proc/sys", "/proc/sys", NULL, MS_BIND|MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_RDONLY, false, false }, { "sysfs", "/sys", "sysfs", MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_RDONLY, false, false }, { "securityfs", "/sys/kernel/security", "securityfs", MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_RDONLY, true, true }, #if WITH_SELINUX -- 1.7.1

1 year

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[libvirt] [PATCH] web docs -- macvtap mode explanation

by Stefan Berger

This adds more information about the different macvtap device modes. Regards, Stefan

1 year

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[libvirt] Supporting vhost-net and macvtap in libvirt for QEMU

by Anthony Liguori

Disclaimer: I am neither an SR-IOV nor a vhost-net expert, but I've CC'd people that are who can throw tomatoes at me for getting bits wrong :-) I wanted to start a discussion about supporting vhost-net in libvirt. vhost-net has not yet been merged into qemu but I expect it will be soon so it's a good time to start this discussion. There are two modes worth supporting for vhost-net in libvirt. The first mode is where vhost-net backs to a tun/tap device. This is behaves in very much the same way that -net tap behaves in qemu today. Basically, the difference is that the virtio backend is in the kernel instead of in qemu so there should be some performance improvement. Current, libvirt invokes qemu with -net tap,fd=X where X is an already open fd to a tun/tap device. I suspect that after we merge vhost-net, libvirt could support vhost-net in this mode by just doing -net vhost,fd=X. I think the only real question for libvirt is whether to provide a user visible switch to use vhost or to just always use vhost when it's available and it makes sense. Personally, I think the later makes sense. The more interesting invocation of vhost-net though is one where the vhost-net device backs directly to a physical network card. In this mode, vhost should get considerably better performance than the current implementation. I don't know the syntax yet, but I think it's reasonable to assume that it will look something like -net tap,dev=eth0. The effect will be that eth0 is dedicated to the guest. On most modern systems, there is a small number of network devices so this model is not all that useful except when dealing with SR-IOV adapters. In that case, each physical device can be exposed as many virtual devices (VFs). There are a few restrictions here though. The biggest is that currently, you can only change the number of VFs by reloading a kernel module so it's really a parameter that must be set at startup time. I think there are a few ways libvirt could support vhost-net in this second mode. The simplest would be to introduce a new tag similar to <source network='br0'>. In fact, if you probed the device type for the network parameter, you could probably do something like <source network='eth0'> and have it Just Work. Another model would be to have libvirt see an SR-IOV adapter as a network pool whereas it handled all of the VF management. Considering how inflexible SR-IOV is today, I'm not sure whether this is the best model. Has anyone put any more thought into this problem or how this should be modeled in libvirt? Michael, could you share your current thinking for -net syntax? -- Regards, Anthony Liguori

1 year

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[libvirt] [PATCH 0/3] Fix ppc64 CPU configuration for QEMU 2.11+

by Jiri Denemark

The original fix was both incomplete and too general. It only fixed domain startup, but libvirt would still report empty list of supported CPU models with recent QEMU for ppc64. On the other hand, while ppc64 QEMU ignores case when looking up CPU model names, x86_64 QEMU does case sensitive lookup. Jiri Denemark (3): Revert "domcaps: Treat host models as case-insensitive strings" util: Introduce virStringListSearch qemu: Adapt to changed ppc64 CPU model names src/conf/domain_capabilities.c | 2 +- src/libvirt_private.syms | 1 + src/qemu/qemu_capabilities.c | 28 +++++++++++++++++-- src/qemu/qemu_capabilities.h | 3 +- src/qemu/qemu_process.c | 2 +- src/util/virstring.c | 28 +++++++++++++++++++ src/util/virstring.h | 3 ++ .../qemu_2.12.0.ppc64.xml | 6 +++- .../caps_2.12.0.ppc64.xml | 12 ++++---- 9 files changed, 73 insertions(+), 12 deletions(-) -- 2.17.0

5 years, 1 month

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[libvirt] [PATCH v4 0/8] Virtio-crypto device support

by Longpeng(Mike)

As virtio-crypto has been supported in QEMU 2.8 and the frontend driver has been merged in linux 4.10, so it's necessary to support virtio-crypto in libvirt. --- Changes since v3: - spilt the capabilities part into a separate patch. [Boris] - include Boris's virtio-crypto ccw support(PATCH 6 & 8). [Boris] - add the missing capabilities in caps_2.9.0.x86_64.xml. [Boris] - fix Indentation and missing virDomainCryptoDefFree. [Marc] Changes since v2: - PATCH 1: modify docs as Martin & Boris's suggestion. [Martin & Boris] - PATCH 2: add the missing 'ToString'. [Martin] - PATCH 3: use virAsprintf instead of virBufferAsprintf. [Martin] remove pointless virBufferCheckError. [Martin] - rebase on master. [Longpeng] Changes since v1: - split patch [Martin] - rebase on master [Martin] - add docs/tests/schema [Martin] - fix typos [Gonglei] --- Boris Fiuczynski (2): qemu: virtio-crypto: add ccw support qemu: virtio-crypto: add test for ccw support Longpeng(Mike) (6): docs: schema: Add basic documentation for the virtual docs: news: Add virtio-crypto devices conf: Parse virtio-crypto in the domain XML caps: Add qemu capabilities about virtio-crypto qemu: Implement support for 'builtin' backend for virtio-crypto tests: Add testcase for virtio-crypto parsing docs/formatdomain.html.in | 61 ++++++ docs/news.xml | 10 + docs/schemas/domaincommon.rng | 30 +++ src/conf/domain_conf.c | 213 ++++++++++++++++++++- src/conf/domain_conf.h | 32 ++++ src/libvirt_private.syms | 5 + src/qemu/qemu_alias.c | 20 ++ src/qemu/qemu_alias.h | 3 + src/qemu/qemu_capabilities.c | 6 + src/qemu/qemu_capabilities.h | 4 + src/qemu/qemu_command.c | 130 +++++++++++++ src/qemu/qemu_command.h | 3 + src/qemu/qemu_domain_address.c | 25 +++ src/qemu/qemu_driver.c | 6 + src/qemu/qemu_hotplug.c | 1 + tests/qemucapabilitiesdata/caps_2.8.0.s390x.xml | 2 + tests/qemucapabilitiesdata/caps_2.8.0.x86_64.xml | 2 + tests/qemucapabilitiesdata/caps_2.9.0.x86_64.xml | 2 + .../qemuxml2argv-virtio-crypto-builtin.xml | 26 +++ .../qemuxml2argv-virtio-crypto-ccw.args | 22 +++ .../qemuxml2argv-virtio-crypto-ccw.xml | 16 ++ .../qemuxml2argv-virtio-crypto.args | 22 +++ tests/qemuxml2argvtest.c | 6 + .../qemuxml2xmlout-virtio-crypto-builtin.xml | 31 +++ tests/qemuxml2xmltest.c | 2 + 25 files changed, 679 insertions(+), 1 deletion(-) create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-virtio-crypto-builtin.xml create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-virtio-crypto-ccw.args create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-virtio-crypto-ccw.xml create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-virtio-crypto.args create mode 100644 tests/qemuxml2xmloutdata/qemuxml2xmlout-virtio-crypto-builtin.xml -- 1.8.3.1

6 years

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[libvirt] [RFC PATCH 0/2] Add new mdev type for aggregated resources

by Zhenyu Wang

Current mdev device create interface depends on fixed mdev type, which get uuid from user to create instance of mdev device. If user wants to use customized number of resource for mdev device, then only can create new mdev type for that which may not be flexible. To allow to create user defined resources for mdev, this RFC trys to extend mdev create interface by adding new "instances=xxx" parameter following uuid, for target mdev type if aggregation is supported, it can create new mdev device which contains resources combined by number of instances, e.g echo "<uuid>,instances=10" > create VM manager e.g libvirt can check mdev type with "aggregation" attribute which can support this setting. And new sysfs attribute "instances" is created for each mdev device to show allocated number. Default number of 1 or no "instances" file can be used for compatibility check. This RFC trys to create new KVMGT type with minimal vGPU resources which can be combined with "instances=x" setting to allocate for user wanted resources. Zhenyu Wang (2): vfio/mdev: Add new instances parameters for mdev create drm/i915/gvt: Add new aggregation type drivers/gpu/drm/i915/gvt/gvt.c | 26 ++++++++++++--- drivers/gpu/drm/i915/gvt/gvt.h | 14 +++++--- drivers/gpu/drm/i915/gvt/kvmgt.c | 9 +++-- drivers/gpu/drm/i915/gvt/vgpu.c | 56 ++++++++++++++++++++++++++++---- drivers/s390/cio/vfio_ccw_ops.c | 3 +- drivers/vfio/mdev/mdev_core.c | 11 ++++--- drivers/vfio/mdev/mdev_private.h | 6 +++- drivers/vfio/mdev/mdev_sysfs.c | 42 ++++++++++++++++++++---- include/linux/mdev.h | 3 +- samples/vfio-mdev/mbochs.c | 3 +- samples/vfio-mdev/mdpy.c | 3 +- samples/vfio-mdev/mtty.c | 3 +- 12 files changed, 141 insertions(+), 38 deletions(-) -- 2.18.0.rc2

6 years, 1 month

6
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[libvirt] [PATCH 00/30] syntax: Remove spaces after casts

by Martin Kletzander

6 years, 1 month

3
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[libvirt] [RFC] cgroup settings and systemd daemon-reload conflict

by Nikolay Shirokovskiy

Hi, all. It turns out that systemd daemon-reload reset settings that are managable thru 'systemctl set-property' interface. > virsh schedinfo tst3 | grep global_quota global_quota : -1 > virsh schedinfo tst3 --set global_quota=50000 | grep global_quota global_quota : 50000 > systemctl daemon-reload > virsh schedinfo tst3 | grep global_quota global_quota : -1 This behaviour does not limited to cpu controller, same for blkio for example. I checked different versions of systemd (219 - Feb 15, and quite recent 236 - Dec 17) to make sure it is not kind of bug of old version. So systemd does not play well with direct writes to cgroup parameters that managable thru systemd. Looks like libvirtd needs to use systemd's dbus interface to change all such parameters. I only wonder how this can be unnoticed for such long time (creating cgroup for domain thru systemd - Jul 2013) as daemon-reload is called upon libvirtd package update. May be I miss something? Nikolay

6 years, 1 month

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[libvirt] [PATCH 0/5] qemu: misc graphics fixes

by Nikolay Shirokovskiy

Nikolay Shirokovskiy (5): qemu: fix typo in vnc port releasing qemu: simplify graphics port releasing qemu: vnc: mark websocket as used on reconnect qemu: mark graphics ports as used on migration qemu: keep websocketGenerated on libvirtd restarts src/conf/domain_conf.c | 9 +++++++++ src/conf/domain_conf.h | 1 + src/qemu/qemu_migration.c | 6 ++++++ src/qemu/qemu_process.c | 51 ++++++++++++++++++++++------------------------- src/qemu/qemu_process.h | 3 +++ 5 files changed, 43 insertions(+), 27 deletions(-) -- 1.8.3.1

6 years, 2 months

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[libvirt] Matching the type of mediated devices in the migration

by Wang, Zhi A

BACKGROUND As the live migration of mdev is going to be supported in VFIO, a scheme of deciding if a mdev could be migratable between the source machine and the destination machine is needed. Mostly, this email is going to discuss a possible solution which needs fewer modifications of libvirt/VFIO. The configuration of a mdev is located in the domain XML, which guides libvirt how to find the mdev and generating the command line for QEMU. It basically only includes the UUID of a mdev. The domain XML of the source machine and destination machine are going to be compared before the migration really happens. Each configuration item would be compared and checked by libvirt. If one item of the source machine is different from the item of destination machine, the migration fails. For mdev, there is no any check/match before the migration happens yet. The user could use the node device list of libvirt to list the host devices and see the capabilities of those devices. The current node device code of libvirt has already been able to extract the supported mdev types from a host PCI device, plus some basic information, like max supported mdev instance of a host PCI device. THE SOLUTION To strictly check the mdev type and make sure the migration happens between the compatible mediated devices, three new mandatory elements in the domain XML below the hostdev element would be introduced: vendorid: The vendor ID of the mdev, which comes from the host PCI device. A user could obtain this information from the host PCI device which supports mdev in the node device list. productid: The product ID of the mdev, which also comes from the host PCI device. A user could obtain this information from the same approach above. mdevtype: The type of the mdev. As the creation of the mdev is managed by the user, the user knows the type of the mdev and would be responsible for filling out this information. These three elements are only needed when the device API of a mdev is "vfio-PCI". Take the example of mdev configuration from https://libvirt.org/formatdomain.html to illustrate the modification: <devices> <hostdev mode='subsystem' type='mdev' model='vfio-pci'> <source> <address uuid='c2177883-f1bb-47f0-914d-32a22e3a8804'/> <vendorid>0xdead</vendorid>  <productid>0xbeef</productid>  <mdevtype>type</mdevtype>  </source> </hostdev> With the newly introduced elements above, the flow of the creation of a domain XML with mdev will be like: 1. The user obtains the vendorid/productid from node device list 2. The user fills the vendorid/productid/mdevtype in the domain XML 3. When a migration happens, libvirt check these elements. If one item is different between two domain XML, then migration fails. POSSIBLE MODIFICATION OF LIBVIRT 1) Introduce three new elements in domain XML parsing and processing functions. 2) Extend the function virDomainDeviceInfoCheckABIStability() which is going to check the host dev part of the domain XMLs between the source machine and the destination machine. So it could fail the migration when it finds out the IDs and the mdev type are different between domain XMLs. PROS Minor changes in libvirt could achieve the mdev type match in the migration. Modifying VFIO and other mdev components is not necessary. Thanks, Zhi.

6 years, 3 months

6
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Devel July 2018