Make sure sysfs_prefix, when present, is always the first argument
to a function; don't use a different name to refer to it; check
whether it is NULL, and hence SYSFS_SYSTEM_PATH should be used, only
when using it directly and not just passing it down to another
function; always pass down the same value we've been passed when
calling another function.

In commit 641a145d I've added code that
resets the balloon memory value to full size prior to resuming the vCPUs
since the size certainly was not reduced at that point.

Since qemuProcessStart is used also in code paths with already booted
up guests (migration, save/restore) the assumption is not entirely true
since the guest might already been running before.

This patch adds a function that queries the monitor rather than using
the full size since a balloon event would not be reissued in case we are
recovering a saved migration state.

Additionally the new function is used also when reconnecting to a VM
after libvirtd restart since we might have missed a few balloon events
while libvirtd was not running.

https://bugzilla.redhat.com/show_bug.cgi?id=1232663

In one of my previous ptaches (bcd9a564) I've tried to fix the problem
that we blindly assumed strict NUMA mode for guests. This led to
several problems like us pinning a domain onto a nodeset via libnuma
among with CGroups. Once the nodeset was changed by user, well, it did
not result in desired effect. See the original commit for more info.
But, the commit I wrote had a bug: when NUMA parameters are changed on
a running domain we require domain to be strictly pinned onto a
nodeset. Due to a typo a condition was mis-evaluated.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

The comment above that function says: "This function can be a lot more
exhaustive, ...", so let's be.

Check for collisions between routes in the system and static routes
being added explicitly from the <route/> element of the network XML.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1094205Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

Add virNetworkDefGetRouteByIndex() similarly to
virNetworkDefGetIpByIndex(), but for routes.
Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

Some of the possible CPUs in a system might not be present, eg. they
might be defective or might have been deconfigured from the ASM console
in a Power system. Due to this fact, Linux keeps track of what CPUs are
possible and what are present separately.

This test uses the data from a system where not all the possible CPUs
are present to make sure libvirt handles this situation correctly.

This patch resolves a situation where a core is defective and is not
in the present mask during boot. Optionally a host can have empty sockets
could be brought online if the socket is added. In this case the present
mask contains the cpu's that are actually there in the sockets even though
they might be offline for some reason. This patch excludes the cpu's that
are offline because the socket is defective/empty by checking the present
mask before reading the cpu directory. Otherwise, the nodeinfo on such
hosts always displays wrong output which includes the defective/empty
sockets as set of offline cpu's.
Signed-off-by: NKothapally Madhu Pavan <kmp@linux.vnet.ibm.com>

Add the sysfs_prefix argument to the call to allow for setting the
path for tests to something other than SYSFS_SYSTEM_PATH.

Add the sysfs_prefix argument to the call to allow for setting the
path for tests to something other than SYSFS_CPU_PATH which is a
derivative of SYSFS_SYSTEM_PATH

Use cpupath for nodeCapsInitNUMAFake and remove SYSFS_CPU_PATH

Add the sysfs_prefix argument to the call to allow for setting the
path for tests to something other than SYSFS_SYSTEM_PATH.

Add the sysfs_prefix argument to the call to allow for setting the
path for tests to something other than SYSFS_SYSTEM_PATH.

Add the sysfs_prefix argument to the call to allow for setting the
path for tests to something other than SYSFS_SYSTEM_PATH.

Add the sysfs_prefix argument to the call to allow for setting the
path for tests to something other than SYSFS_SYSTEM_PATH.

Add the sysfs_prefix argument to the call to allow for setting the
path for tests to something other than SYSFS_SYSTEM_PATH.

The API will print the path to the /cpu/present file using the sysfs_prefix.

NB: This is setup for future patches which will allow local/test sysfs paths.

With the latest patch to the vz driver (7d73ca06) I was
getting some compilation errors. It turned out, my installation
of the parallels SDK was not as fresh as it could be. Parallels
installed in my system were missing the
PRL_USE_VNET_NAME_FOR_BRIDGE_NAME symbol which simply was not
introduced at the time I was installing the SDK. The symbol was
introduced in 86e62a5d which was then part of the 7.0.22 release.
Require that version at least therefore.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

Eventually, every driver will be moved to a special module.
But for today the winner is Virtuozzo driver.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

After Jirka's migration patches libvirt is listening on migration
events from qemu instead of actively polling on the monitor. There is,
however, a little regression (introduced in 6d2edb6a). The
problem is, the current status of migration job is updated in
qemuProcessHandleMigrationStatus if and only if migration job was
started. But eventually every asynchronous job may result in
migration. Therefore, since this job is not strictly a
migration job, internal state was not updated and later checks failed:

  virsh # save fedora22 /tmp/fedora22_ble.save
  error: Failed to save domain fedora22 to /tmp/fedora22_ble.save
  error: operation failed: domain save job: is not active
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

Commit 45697fe5 added dom0 to driver->domains, but missed
setting its state to 'running'

$ virsh list
 Id    Name                           State
----------------------------------------------------
 0     Domain-0                       shut off

We create a virtual network of special type, which
has the same name as bridge name to create bridged
network adapter in vz. So when we delete such an
adapter we have to remove corresponding virtual
network.

So let's rename prlsdkDelNet to prlsdkCleanupBridgedNet
and don't check for return value.
Signed-off-by: NDmitry Guryanov <dguryanov@parallels.com>

When QEMU exits on destination during migration, the source reports
either success (if the failure happened at the very end) or unhelpful
"unexpectedly failed" error message. However, the Finish API called on
the destination may report a real error so let's use it instead of the
generic one.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

virDomainMigrateFinish* APIs were unfortunately designed to return the
pointer to the domain on destination and NULL on error. This looks OK in
normal cases but the same API is also called when we know migration
failed and thus we expect Finish to return NULL even if it actually did
all it was supposed to do without any error. The call is defined to
return nonnull domain pointer over RPC, which means returning NULL will
always result in an error being send. If this was not in fact an error,
the API itself wouldn't set anything to the thread local virError, which
makes the RPC layer come up with it's own "Library function returned
error but did not set virError" error.

This is quite confusing and also hard to detect by the caller. This
patch adds a special error code which can be used to check that Finish
successfully aborted migration.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

If QEMU fails during incoming migration, the domain disappears including
a possibly useful error message read from QEMU log file. Let's remember
the error in virQEMUDriver so that Finish can report more than just "no
such domain".
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

A helper function for copying error objects.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

This is a self-locking wrapper around virHashTable. Only a limited set
of APIs are implemented now (the ones which are used in the following
patch) as more can be added on demand.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

Corresponding QEMU commits:
    MPX     79e9ebebbf2a00c46fcedb6dc7dd5e12bbd30216
    AVX512  9aecd6f8aef653cea58932f06a2740299dbe5fd3
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

With commit 3f9868a5 virt-aa-helper stopped working due to missing
DomainGuest in the caps.

The test with -c without arch also needs to be
removed since the new capabilities code uses the host arch when none is
provided.

ctl->hvm contains os.type string value, change the name to reflect it.

Initializing libvirt log in virt-aa-helper and getting it to output
libvirt log to stderr. This will help debugging problems happening in
libvirt functions called from within virt-aa-helper

Rules generated for a path like '/' were having '//' which isn't
correct for apparmor. Make virt-aa-helper smarter to avoid these.

Daemon used false logic for determining whether there were any clients.
When the timer was inactive, it was activated if at least one of the
servers did not have clients.  So the bool was being flipped there and
back all the time in case there was one client, for example.

Initially introduced by fa142073.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1240283Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

So callers don't have to iterate over each server.
Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

In commit 714b38cb I tried to avoid
having two disks with the same WWN in a VM. I forgot to check the
hotplug paths though which make it possible bypass that check. Reinforce
the fix by checking the wwn when attaching the disk.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1208009

When virsh vol-clone is attempted on a raw file where capacity > allocation,
the resulting cloned volume has a size that matches the virtual-size of
the parent; in place of matching its actual, disk size.
This patch fixes the cloned disk to have same _allocated_size_ as
the parent file from which it was cloned.

Ref: http://www.redhat.com/archives/libvir-list/2015-May/msg00050.html

Also fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1130739Signed-off-by: NPrerna Saxena <prerna@linux.vnet.ibm.com>
Signed-off-by: NJán Tomko <jtomko@redhat.com>

Instead of storing the remaining bytes, store the position of the first
unallocated byte. This will allow changing the amount of bytes copied
by virStorageBackendCopyToFD without changing the safezero call.

No functional impact.

Libvirt's error messages do not end with a LF. However, when reading the
error from QEMU log, we would read the LF from the log and keep it in
the message.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

Since we already support the MIGRATION event, we just need to make sure
the domain condition is signalled whenever a p2p connection drops or the
domain is paused due to IO error and we can avoid waking up every 50 ms
to check whether something happened.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

We don't need to call query-migrate every 50ms when we get the current
migration state via MIGRATION event.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

When QEMU supports migration events the qemuDomainJobInfo structure will
no longer be updated with migration statistics. We have to enter a job
and explicitly ask QEMU every time virDomainGetJob{Info,Stats} is
called.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>