To make the code future proof, the rest of the
qemuValidateDomainDeviceDefAddress() has to be executed (even
though there is nothing there yet) instead of returning directly.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NAndrea Bolognani <abologna@redhat.com>

If initializing test monitor in testQemuHotplugCpuPrepare()
fails, the control jumps to error label where
testQemuHotplugCpuDataFree() is called. But since the data->mon
is NULL due to aforementioned failure,
qemuMonitorTestGetMonitor() dereferences a NULL pointer leading
to a SIGSEGV.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NAndrea Bolognani <abologna@redhat.com>

Commit 07659100 ("conf: fix zPCI address auto-generation on
s390") is doing a check for virZPCIDeviceAddressIsIncomplete()
prior to checking if the device has a ZPCI address at all. This
results in errors like these when starting libvirt:

  error : virDomainDeviceInfoFormat:7527 : internal error:
  Missing uid or fid attribute of zPCI address

Fix it by moving virZPCIDeviceAddressIsIncomplete() after the
check done by virZPCIDeviceAddressIsPresent().

Fixes: 07659100Signed-off-by: NDaniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: NAndrea Bolognani <abologna@redhat.com>

Signed-off-by: NShalini Chellathurai Saroja <shalini@linux.ibm.com>
Reviewed-by: NAndrea Bolognani <abologna@redhat.com>

Add test with a ZPCI host device and a CCW memballoon device to ensure
that CCW address remains the default address assigned.
Signed-off-by: NBoris Fiuczynski <fiuczy@linux.ibm.com>
Signed-off-by: NShalini Chellathurai Saroja <shalini@linux.ibm.com>
Reviewed-by: NBjoern Walk <bwalk@linux.ibm.com>
Reviewed-by: NBoris Fiuczynski <fiuczy@linux.ibm.com>
Reviewed-by: NAndrea Bolognani <abologna@redhat.com>

1. Test for auto-generating uids while specifying valid fids
2. Test for auto-generating fids while specifying valid uids
3. Test for parse error while specifying a valid fid and an invalid
   uid
4. Test for parse error while specifying two ZPCI devices with same
   uid and fid addresses
5. Test for parse error when both uid and fid are set to zero
6. Test for error while specifying uid and not providing ZPCI
   capability.
Signed-off-by: NBoris Fiuczynski <fiuczy@linux.ibm.com>
Signed-off-by: NBjoern Walk <bwalk@linux.ibm.com>
Signed-off-by: NShalini Chellathurai Saroja <shalini@linux.ibm.com>
Reviewed-by: NBjoern Walk <bwalk@linux.ibm.com>
Reviewed-by: NBoris Fiuczynski <fiuczy@linux.ibm.com>
Reviewed-by: NAndrea Bolognani <abologna@redhat.com>

The ZPCI device validation is specific to qemu. So, let us move the
ZPCI uid validation out of domain xml parsing into qemu domain device
validation.
Signed-off-by: NShalini Chellathurai Saroja <shalini@linux.ibm.com>
Reviewed-by: NBjoern Walk <bwalk@linux.ibm.com>
Reviewed-by: NBoris Fiuczynski <fiuczy@linux.ibm.com>
Reviewed-by: NAndrea Bolognani <abologna@redhat.com>

Let us fix the issues with zPCI address validation and auto-generation
on s390.

Currently, there are two issues with handling the ZPCI address
extension. Firstly, when the uid is to be auto-generated with a
specified fid, .i.e.:

    ...
    <address type='pci'>
        <zpci fid='0x0000001f'/>
    </address>
    ...

we expect uid='0x0001' (or the next available uid for the domain).
However, we get a parsing error:

    $ virsh define zpci.xml
    error: XML error: Invalid PCI address uid='0x0000', must be > 0x0000
    and <= 0xffff

Secondly, when the uid is specified explicitly with the invalid
numerical value '0x0000', we actually expect the parsing error above.
However, the domain is being defined and the uid value is silently
changed to a valid value.

The first issue is a bug and the second one is undesired behaviour, and
both issues are related to how we (in-band) signal invalid values for
uid and fid. So let's fix the XML parsing to do validation based on what
is actually specified in the XML.

The first issue is also related to the current code behaviour, which
is, if either uid or fid is specified by the user, it is incorrectly
assumed that both uid and fid are specified. This bug is fixed by
identifying when the user specified ZPCI address is incomplete and
auto-generating the missing ZPCI address.
Signed-off-by: NBjoern Walk <bwalk@linux.ibm.com>
Signed-off-by: NBoris Fiuczynski <fiuczy@linux.ibm.com>
Signed-off-by: NShalini Chellathurai Saroja <shalini@linux.ibm.com>
Reviewed-by: NAndrea Bolognani <abologna@redhat.com>

Signed-off-by: NBjoern Walk <bwalk@linux.ibm.com>
Signed-off-by: NShalini Chellathurai Saroja <shalini@linux.ibm.com>
Reviewed-by: NBoris Fiuczynski <fiuczy@linux.ibm.com>
Reviewed-by: NAndrea Bolognani <abologna@redhat.com>

Refer to the notion of mount propagation instead which describes
the actual behaviour more clearly.
Reviewed-by: NPeter Krempa <pkrempa@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

Jenkins replaced use of the term 'slave' with 'agent' when
describing its architecture.
Reviewed-by: NPeter Krempa <pkrempa@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

The wiki page we currently link to is just a redirect for
back compat.
Reviewed-by: NPeter Krempa <pkrempa@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

The two sides of a PTY can be referred to as primary and secondary
TTYs.
Reviewed-by: NPeter Krempa <pkrempa@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

When querying QEMU we have to iterate over two nested sets
of CPUs. The terms "main vcpu" and "sub vcpu" are a good
representation.
Reviewed-by: NPeter Krempa <pkrempa@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

The two sides of a PTY can be referred to as primary and  secondary
TTYs.
Reviewed-by: NPeter Krempa <pkrempa@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

Network interfaces are simply attached to a bridge device.
Reviewed-by: NPeter Krempa <pkrempa@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

Network interfaces are simply attached to a bridge device.
Reviewed-by: NPeter Krempa <pkrempa@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

The term "ignored" is a better choice for the filtering performed
on devices from udev.
Reviewed-by: NPeter Krempa <pkrempa@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

This new naming matches the terminology used in the error
messages that the callers report.
Reviewed-by: NPeter Krempa <pkrempa@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

The term is redundant in the context used.
Reviewed-by: NPeter Krempa <pkrempa@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

When listing CPU models, we need to filter the data based on sets
of permitted and forbidden CPU models.
Reviewed-by: NPeter Krempa <pkrempa@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

The term "access control list" better describes the concept involved.
Reviewed-by: NPeter Krempa <pkrempa@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

The term "access control list" better describes the concept involved.
Reviewed-by: NPeter Krempa <pkrempa@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

The term "access control list" better describes the concept involved.
Reviewed-by: NPeter Krempa <pkrempa@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

The term "permitted list" is a better choice for the filtering
logic applied.
Reviewed-by: NPeter Krempa <pkrempa@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

CentOS does not have the cppi package, so some code style checks are
skipped. Switch to a openSUSE image to do the code style checks.
Signed-off-by: NJonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: NAndrea Bolognani <abologna@redhat.com>
Reviewed-by: NErik Skultety <eskultet@redhat.com>

When parsing domain XML post parse callbacks are run and one of
them might try and call API from a non-hypervisor driver (e.g.
just like qemuDomainDeviceNetDefPostParse() is doing - it calls a
network API). To avoid this in the test suite, set dummy drivers,
which renders all non-hypervisor APIs return error.

This mimics what qemuxml2argvtest does.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>

When using the DO_TEST_PARSE_ERROR() macro, a failure to parse the input
file is considered a successful test. However, if the input file is
totally missing, that should be distinguished from a parsing error and
not be treated as a test success.

The function virDomainDefParseFile() simply returns NULL for any parse
failure, including a missing file. So we need to explicitly check
whether the file exists first, and fail the test if it is missing.
Signed-off-by: NJonathon Jongsma <jjongsma@redhat.com>

Although a ramfb video device is not a PCI device, we don't currently
report an error for ramfb device definitions containing a PCI address.
However, a guest configured with such a device will fail to start:

    # virsh start test1
    error: Failed to start domain test1
    error: internal error: qemu unexpectedly closed the monitor: 2020-06-16T05:23:02.759221Z qemu-kvm: -device ramfb,id=video0,bus=pcie.0,addr=0x1: Device 'ramfb' can't go on PCIE bus

A better approach is to reject any device definitions that contain PCI
addresses.  While this is a change in behavior, any existing
configurations were non-functional.

https://bugzilla.redhat.com/show_bug.cgi?id=1847259Signed-off-by: NJonathon Jongsma <jjongsma@redhat.com>

A few commits back (in v6.4.0-131-gbdb8f2e4) the post parse
function for domain interface was changed so that it doesn't fill
in model for hostdev types of interfaces (including network type
interfaces which would end up hostdevs).

While the idea is sound, the execution can be a bit better:
virDomainNetResolveActualType() which is used to determine
runtime type of given interface is heavy gun - it connects to
network driver, fetches network XML, parses it. This all is
followed by check whether the interface doesn't already have
model set (from domain XML).

If we switch the order of these two checks then the short circuit
evaluation will ensure the expensive check is done only if really
needed.

This commit in fact fixes qemuxml2xmltest which due to lacking
fake network driver tries to connect to network:///session and
start the virtnetworkd. Fortunately, because of
v6.3.0-25-gf28fbb05 it fails to do so and
virDomainNetResolveActualType() returns -1. The only reason we
don't see the test failing is because our input XMLs have model
and thus we are saved by the latter (now former) check.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NLaine Stump <laine@redhat.com>

All targets get pip3, which is now part of the base system, and
the number of native packages included in the MinGW containers is
significantly reduced.

The corresponding libvirt-ci commit is 4ff697ba0b5d.
Signed-off-by: NAndrea Bolognani <abologna@redhat.com>

There were two upstream issues filed for the problem so it's worth
mentioning.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NAndrea Bolognani <abologna@redhat.com>

oVirt does merge images out of libvirt in some cases. Add docs outlining
how it's done from a high level.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>

Simplify the docs and reduce maintenance burden by just describing the
algorithm by a pseudo-language. Users are encouraged to use libvirt
anyways and projects such as oVirt which do some management of storage
themselves are unlikely to use bash anyways.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>

Define what users should look for when wanting to manipulate bitmaps
themselves.

Later on a patch will turn the bash algorithms into pseudocode for
simplicity.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>

Add a section that outlines usage of tools to handle bitmaps and
introduce terms corresponding to the output of qemu-img to be used in
further sections.

With this we can simplify the section about checking bitmap health as we
don't have to explain the qemu-img output but can refer to the newly
defined terms.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>

Emphasize what needs to happen and also that creating a snapshot doesn't
create the appropriate bitmaps. Also mention that granularity is kept.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>

Make it obvious what's meant by 'overlay' and 'backing image' for sake
of extension of the document.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>

Until recently, an <interface type='network'> would automatically be
assigned model "rtl8139", which in turn would lead to the device being
assigned a PCI address on a conventional PCI controller (i.e. a
pcie-to-pci-bridge). If the network was a typical Linux host
bridge-based network that used an emulated device, this would be
appropriate, since the guest actually would get an emulated rtl8139
NIC, and that device is a conventional PCI device.

However, if the network being used was a pool of hostdev devices, the
guest would get an actual PCIe network device assigned from the host
via VFIO; while the interface model in that case is irrelevant for the
QEMU commandline to assign the device, the PCI address would have
already been assigned prior to runtime, so the address assignment
would be done based on the model='rtl8139' - a conventional PCI
device. VFIO assignment of a PCIe device to a conventional PCI slot
works, but we would rather have these devices in a PCIe slot.

Since commit bdb8f2e4, if <interface type='network'> points to a
etwork that is a pool of hostdev devices, the interface model will be
_unset_ by default. This patch uses that information when deciding
what type of slot to assign to the device: since all hostdev network
interfaces are SR-IOV VFs, and *all* SR-IOV network cards are PCIe, it
is safe to assume that the VFs are PCIe and we should assign then to a
PCIe slot in the guest.
Signed-off-by: NLaine Stump <laine@redhat.com>
Reviewed-by: NAndrea Bolognani <abologna@redhat.com>

All the domain job related APIs were present in `qemu_domain.c`
along with the other domain APIs. In this patch, we move all the
qemu domain job APIs into a separate file.

Also, in this process, `qemuDomainTrackJob()`,
`qemuDomainFreeJob()`, `qemuDomainInitJob()` and
`qemuDomainObjSaveStatus()` were converted to a non-static
funciton and exposed using `qemu_domain.h`.
Signed-off-by: NPrathamesh Chavan <pc44800@gmail.com>
Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>