The current algorithm for slot allocation tries to be clever
and avoid looking at buses / slots more than once unless it's
necessary. Unfortunately that makes the code more complex,
and it will cause problem later on in some situations unless
even more complex code is added.
Since the performance gains are going to be pretty modest
anyway, we can just get rid of the extra complexity and use a
completely straighforward implementation instead.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
Later on we're going to need access to information about IOMMU
groups for host devices. Implement the support in virpcimock,
and start using that mock library in a few QEMU test cases.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
Use 0001:01:00.0 instead of 0000:04:02.0 as the source address
for the host device. This doesn't change anything at the moment,
but it will make a difference later on.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
We use hostdev->info frequently enough that having
a shorter name for it makes the code more readable.
We will also be adding even more uses later on.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
Move @function after @flags to match other functions in the
same module like virDomainPCIAddressReserveNextAddr().
Also move virDomainPCIAddressReserveNextAddr() closer to
virDomainPCIAddressReserveAddr() in the header file.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
This function was private to the QEMU driver and was,
accordingly, called qemuDomainPCIBusFullyReserved().
However the function is really not QEMU-specific at
all, so it makes sense to move it closer to the
virDomainPCIAddressBus struct it operates on.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
The virDomainDeviceInfoIsSet() function no longer exists.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
Modify code to have two spaces between functions, follow function more
recent function formatting w/r/t args per line and function return type
and name on separate lines.
Signed-off-by: John Ferlan <jferlan@redhat.com>
New name is qemuBlockStorageSourceGetGlusterProps and also hardcode the
protocol name rather than calling the ToString function, since this
function can't be made universal.
New name is qemuBlockStorageSourceBuildHostsJSONSocketAddress since it
formats the JSON object in accordance with qemu's SocketAddress type.
Since the new naming in qemu uses 'inet' instead of 'tcp' add a
compatibility layer for gluster which uses the old name.
Rename it to qemuBlockStorageSourceGetBackendProps and refactor it to
return the JSON object instead of filling a pointer since now it's
always expected to return data.
Add logic which will call qemuGetDriveSourceProps only in cases where we
need the JSON representation. This will allow qemuGetDriveSourceProps to
generate the JSON representation for all possible disk sources.
The command line generators for the protocols above hardcoded a default
port number. Since we now always assign it when parsing the source
definition, this ad-hoc code is not required any more.
Fill them in right away rather than having to figure out at runtime
whether they are necessary or not.
virStorageSourceNetworkDefaultPort does not need to be exported any
more.
Since we're storing a virUUIDFormat'd string in our Hash Table, let's
modify the Lookup API to receive a formatted string as well.
Signed-off-by: John Ferlan <jferlan@redhat.com>
This reverts commit e4b980c853.
When a binary links against a .a archive (as opposed to a shared library),
any symbols which are marked as 'weak' get silently dropped. As a result
when the binary later runs, those 'weak' functions have an address of
0x0 and thus crash when run.
This happened with virtlogd and virtlockd because they don't link to
libvirt.so, but instead just libvirt_util.a and libvirt_rpc.a. The
virRandomBits symbols was weak and so left out of the virtlogd &
virtlockd binaries, despite being required by virHashTable functions.
Various other binaries like libvirt_lxc, libvirt_iohelper, etc also
link directly to .a files instead of libvirt.so, so are potentially
at risk of dropping symbols leading to a later runtime crash.
This is normal linker behaviour because a weak symbol is not treated
as undefined, so nothing forces it to be pulled in from the .a You
have to force the linker to pull in weak symbols using -u$SYMNAME
which is not a practical approach.
This risk is silent bad linkage that affects runtime behaviour is
not acceptable for a fix that was merely trying to fix the test
suite. So stop using __weak__ again.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
When libvirt starts a new QEMU domain, it replaces host-model CPUs with
the appropriate custom CPU definition. However, when reconnecting to a
domain started by older libvirt (< 2.3), the domain would still have a
host-model CPU in its active definition.
https://bugzilla.redhat.com/show_bug.cgi?id=1463957
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
qemuProcessReconnect will need to call additional functions which were
originally defined further in qemu_process.c.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Separated from qemuProcessUpdateAndVerifyCPU to handle updating of an
active guest CPU definition according to live data from QEMU.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
In addition to updating a guest CPU definition the function verifies
that all required features are provided to the guest. Let's make it
obvious by calling it qemuProcessUpdateAndVerifyCPU.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Separated from qemuProcessUpdateLiveGuestCPU. The function makes sure
a guest CPU provides all features required by a domain definition.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Separated from qemuProcessUpdateLiveGuestCPU. Its purpose is to fetch
guest CPU data from a running QEMU process. The data can later be used
to verify and update the active guest CPU definition.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
CPU features unknown to a hypervisor will not be present in dataDisabled
even though the features won't naturally be enabled because.
Thus any features we asked for which are not in dataEnabled should be
considered disabled.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
When checking ABI stability between two domain definitions, we first
make migratable copies of them. However, we also asked for the guest CPU
to be updated, even though the updated CPU is supposed to be already
included in the original definitions. Moreover, if we do this on the
destination host during migration, we're potentially updating the
definition with according to an incompatible host CPU.
While updating the CPU when checking ABI stability doesn't make any
sense, it actually just worked because updating the CPU doesn't do
anything for custom CPUs (only host-model CPUs are affected) and we
updated both definitions in the same way.
Less then a year ago commit v2.3.0-rc1~42 stopped updating the CPU in
the definition we got internally and only the user supplied definition
was updated. However, the same commit started updating host-model CPUs
to custom CPUs which are not affected by the request to update the CPU.
So it still seemed to work right, unless a user upgraded libvirt 2.2.0
to a newer version while there were some domains with host-model CPUs
running on the host. Such domains couldn't be migrated with a user
supplied XML since libvirt would complain:
Target CPU mode custom does not match source host-model
The fix is pretty straightforward, we just need to stop updating the CPU
when checking ABI stability.
https://bugzilla.redhat.com/show_bug.cgi?id=1463957
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Currently the scan of the /proc/mounts file used to find cgroup mount
points doesn't take into account that mount points may hidden by other
mount points. For, example in certain Kubernetes environments the
/proc/mounts contains the following lines:
cgroup /sys/fs/cgroup/net_prio,net_cls cgroup ...
tmpfs /sys/fs/cgroup tmpfs ...
cgroup /sys/fs/cgroup/net_cls,net_prio cgroup ...
In this particular environment the first mount point is hidden by the
second one. The correct mount point is the third one, but libvirt will
never process it because it only checks the first mount point for each
controller (net_cls in this case). So libvirt will try to use the first
mount point, which doesn't actually exist, and the complete detection
process will fail.
To avoid that issue this patch changes the virCgroupDetectMountsFromFile
function so that when there are duplicates it takes the information from
the last line in /proc/mounts. This requires removing the previous
explicit condition to skip duplicates, and adding code to free the
memory used by the processing of duplicated lines.
Related-To: https://bugzilla.redhat.com/1468214
Related-To: https://github.com/kubevirt/libvirt/issues/4
Signed-off-by: Juan Hernandez <jhernand@redhat.com>
After 426dc5eb2 qemuCaps and virDomainDefPtr are unused here,
remove it from the call stack
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
Obviously, old gcc-s ale sad when a variable shares the name with
a function. And we do have such variable (added in 4d8a914be0):
@mount. Rename it to @mountpoint so that compiler's happy again.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
The way we create devices under /dev is highly linux specific.
For instance we do mknod(), mount(), umount(), etc. Some
platforms are even missing some of these functions. Then again,
as declared in qemuDomainNamespaceAvailable(): namespaces are
linux only. Therefore, to avoid obfuscating the code by trying to
make it compile on weird platforms, just provide a non-linux stub
for qemuDomainAttachDeviceMknodRecursive(). At the same time,
qemuDomainAttachDeviceMknodHelper() which actually calls the
non-existent functions is moved under ifdef __linux__ block since
its only caller is in that block too.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1467826
Commit id 'b9b1aa639' was supposed to add logic to set the allocation
for sparse files when wr_highest_offset was zero; however, an unconditional
setting was done just prior. For block devices, this means allocation is
always returning 0 since 'actual-size' will be zero.
Remove the unconditional setting and add the note about it being possible
to still be zero for block devices. As soon as the guest starts writing to
the volume, the allocation value will then be obtainable from qemu via
the wr_highest_offset.
Use the full storage driver registration method that also fails if one
of the storage backends is not present. This makes the test fail if a
submodule fails registration, which is useful for testing.
Additionally return EXIT_FAILURE as usual in tests rather than -1.
The Win32 platform will fail to link if you use weak symbols
because it is incompatible with exporting symbols in a DLL:
Cannot export virRandomGenerateWWN: symbol wrong type (2 vs 3)
We only need weak symbols for our test suite to do LD_PRELOAD
and this doesn't work on Win32, so we can just drop the hack
for Win32
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
If we exceed a fixed limit in RPC code we get a horrible message
like this, if the parameter type is a 'string', because we forgot
to initialize the error message type field:
$ virsh snapshot-list ostack1
error: too many remote undefineds: 1329 > 1024
It would also be useful to know which RPC call and field was
exceeded. So this patch makes us report:
$ virsh snapshot-list ostack1
error: too many remote undefineds: 1329 > 1024,
in parameter 'names' for 'virDomainSnapshotListNames'
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
