Rather than iterating 3 times for various settings this function
aggregates all the code into single place. One of the other advantages
is that it can then be reused for properly setting vCPU info on hotplug.

With this approach autoCpuset is also used when setting the process
affinity rather than just via cgroups.

Commit 8cd1d546 consolidates both daemon and remote driver typed param
serialization functions. The consolidation now enforces client to use
VIR_TYPED_PARAM_STRING_OKAY flag to properly serialize string parameters, which
server has used for quite some time now. And this caused an issue, since the
commit had not adjusted client remote calls appropriately, thus causing a
failure in blkiotune, numatune and migration APIs (as per Xen CI tests). This
patch adjusts both remote_driver.c and gendispatch.pl to properly address this
issue.

http://lists.xenproject.org/archives/html/xen-devel/2016-02/msg01012.htmlSigned-off-by: NJoao Martins <joao.m.martins@oracle.com>
Signed-off-by: NErik Skultety <eskultet@redhat.com>

In the commit 7938b533 we've changed the function signature,
however forgot to update stump that's used on systems without
CGroups causing a build failure.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

Similarly to previous commit change the way how iothread scheduler info
is stored and clean up a lot of unnecessary code.

Due to bad design the vcpu sched element is orthogonal to the way how
the data belongs to the corresponding objects. Now that vcpus are a
struct that allow to store other info too, let's convert the data to the
sane structure.

The helpers for the conversion are made universal so that they can be
reused for iothreads too.

This patch also resolves https://bugzilla.redhat.com/show_bug.cgi?id=1235180
since with the correct storage approach you can't have dangling data.

virDomainDefFormatInternal is growing rather large. Extract the cputune
formatter into a separate function.

Now that the pinning info is stored elsewhere we can delete all the
obsolete code.

Now with the new struct the data can be stored in a much saner place.

This step can be omitted, so that drivers can decide what to do when the
user requests to use default vcpu pinning.

Now that qemuDomainDetectVcpuPids is able to refresh the vCPU pid
information it can be reused in the hotplug and hotunplug code paths
rather than open-coding a very similar algorithm.

A slight algorithm change is necessary for unplug since the vCPU needs
to be marked offline prior to calling the thread detector function and
eventually rolled back if something fails.

Some callers will need to behave differently when the detection failed
and when the VM crashed during the redetection. Return -2 if it crashed.

Pass a bitmap of enabled guest vCPUs to virCgroupGetPercpuStats so that
non-continuous vCPU topologies can be used.

Move the logic from virDomainDiskDefDstDuplicates into
virDomainDiskDefCheckDuplicateInfo so that we don't have to loop
multiple times through the array of disks. Since the original function
was called in qemuBuildDriveDevStr, it was actually called for every
single disk which was quite wasteful.

Additionally the target uniqueness check needed to be duplicated in
the disk hotplug case, since the disk was inserted into the domain
definition after the device string was formatted and thus
virDomainDiskDefDstDuplicates didn't do anything in that case.

Some of the tests that are not a part of qemuBuildCommandLine were not
executed in the test suite. We can now reuse qemuProcessStartValidate to
integrate these tests.

When starting a qemu process there are certain checks done to ensure
that the configuration makes sense. Extract them into a separate
function so that they can be reused in the test code.

Retrieval of the driver capabilities as well as emulator capabilities
does not require the complete qemuProcessStop to be executed on
failure.

We do the check on VM start, but the user could still hotplug a disk
with a conflicting serial or WWN. Reuse the checker function to fix the
issue.

Put it into a separate function that can be called on two disk def
pointers.

Target uniqueness check was duplicated in all of the three workers
called from it. Extract it to the parent.

Remove the default case since all cases are covered.

In b3d2a42e I've refactored the code and moved the 'cleanup' label.
Unfortunately the code that was originally in the 'endjob' label and
wanted to jump to cleanup is now in the cleanup label. Remove the jump
and let the function finish.

If we are attempting to thaw the filesystems on error, the code would
overwrite the error code that caused the snapshot to fail with the error
of thawing the filesystem. Since the thawing function allows control of
error reporting behavior we can use this feature.

Add a stub for nodeDeviceSysfsGetPCIRelatedDevCaps() for non-Linux
platforms. It allows nodedev driver to work on non-Linux platoforms
that, however, have HAL.

Commit id 'c3bd0019' removed arg3, but forgot to adjust the numbers
for NONNULL - caused build failure for coverity

Syntax-check fails with:

cppi: src/bhyve/bhyve_driver.h: line 26: not properly indented
cppi: src/bhyve/bhyve_driver.h: line 27: not properly indented
maint.mk: incorrect preprocessor indentation

Fix by properly indenting '#include's.

Pushed as trivial.

After 1036ddad we use bhyveDriverGetCapabilities from other
sources too, not only from bhyve_driver.c. However, the function
was static so not properly expose to other files. In order to
expose it, we need to move couple of #include-s too.
Then, there has been a copy paste error in
virBhyveProcessReconnect: s/privconn/data->driver/.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

Most of the qemuargv2xml tests are parsing old style qemu command
lines (with -disk, -serial, etc), and it gets its input from
qemuxml2argv output.

But since we've raise the minimum supported qemu version to 0.12.0,
which supports -device, once that changes propagates through libvirt
the vast majority of qemuxml2argv output is _not_ going to be using
old style qemu options.

In preparation for this, switch qemuargv2xml to use its own copies
of input and output, so it's not tied to qemuxml2argv results.

This is just a straight copy of the current tests.

To get properly wrapped output

This was only used in debugging messages and not in any real code.

Ceph/RBD uses uint64_t for sizes internally and they can be printed
with %zu without any need for casting.
Signed-off-by: NWido den Hollander <wido@widodh.nl>

Through the years the RBD storage pool code hasn't maintained the
same or correct coding standard which applies to libvirt.

This patch doesn't change any logic in the code, it only applies
the proper coding standards to the code where possible without
making large changes.

This way the code style used in this storage pool is consistent
throughout the whole file.
Signed-off-by: NWido den Hollander <wido@widodh.nl>

I've noticed that variable @reply is not initialized and if
something at the beginning of the function fails, e.g.
virDBusGetSystemBus(), the control jump straight to cleanup label
where dbus_message_unref() is then called over this uninitialized
variable.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

I've noticed couple of warning in dmesg while debugging
something:

[ 9683.973754] HTB: quantum of class 10001 is big. Consider r2q change.
[ 9683.976460] HTB: quantum of class 10002 is big. Consider r2q change.

I've read the HTB documentation and linux kernel code to find out
what's wrong. Basically we need to pass another argument
"quantum" to our tc cmd line because the default computed by HTB
does not always work in which case the warning message is printed
out.

You can read more details here:

http://luxik.cdi.cz/~devik/qos/htb/manual/userg.htm#sharingSigned-off-by: NMichal Privoznik <mprivozn@redhat.com>

As the scheduler info elements are represented orthogonally to how it
makes sense to actually store the information, the extracted code will
be later used when converting between XML and internal definitions.

Performs binary subtraction of two bitmaps. Stores result in the first
operand.

So, systemd-machined has this philosophy that machine names are like
hostnames and hence should follow the same rules.  But we always allowed
international characters in domain names.  Thus we need to modify the
machine name we are passing to systemd.

In order to change some machine names that we will be passing to systemd,
we also need to call TerminateMachine at the end of a lifetime of a
domain.  Even for domains that were started with older libvirt.  That
can be achieved thanks to virSystemdGetMachineNameByPID().  And because
we can change machine names, we can get rid of the inconsistent and
pointless escaping of domain names when creating machine names.

So this patch modifies the naming in the following way.  It creates the
name as <drivername>-<id>-<name> where invalid hostname characters are
stripped out of the name and if the resulting name is longer, it
truncates it to 64 characters.  That way we can start domains we
couldn't start before.  Well, at least on systemd.

To make it work all together, the machineName (which is needed only with
systemd) is saved in domain's private data.  That way the generation is
moved to the driver and we don't need to pass various unnecessary
arguments to cgroup functions.

The only thing this complicates a bit is the scope generation when
validating a cgroup where we must check both old and new naming, so a
slight modification was needed there.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1282846Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

The virDomainSnapshotDefFormat calls into virDomainDefFormat,
so should be providing a non-NULL virCapsPtr instance. On the
qemu driver we change qemuDomainSnapshotWriteMetadata to also
include caps since it calls virDomainSnapshotDefFormat.
Signed-off-by: NJoao Martins <joao.m.martins@oracle.com>