Add support to read/parse the iotune group setting for qemu.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

Call 'query-qmp-schema' and store the returned types in a hash table
keyed by the 'name' field so that the capabilities code can traverse it.

Add support for a duration/length for the bps/iops and friends.

Modify the API in order to add the "blkdeviotune." specific definitions
for the iotune throttling duration/length options

    total_bytes_sec_max_length
    write_bytes_sec_max_length
    read_bytes_sec_max_length
    total_iops_sec_max_length
    write_iops_sec_max_length
    read_iops_sec_max_length

The list of supported CPU models in domain capabilities is stored in
virDomainCapsCPUModels. Let's use the same object for storing CPU models
in QEMU capabilities.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

Add support for retrieving information regarding hotpluggable cpu units
supported by qemu. Data returned by the command carries information
needed to figure out the granularity of hotplug, the necessary cpu type
name and the topology information.

Note that qemu doesn't specify any particular order of the entries thus
it's necessary sort them by socket_id, core_id and thread_id to the
order libvirt expects.

Prepare to extract more data by returning an array of structs rather than
just an array of thread ids. Additionally report fatal errors separately
from qemu not being able to produce data.

Use a name that contains the command used to get the information.

Rather than formatting a string and splitting it back to a JSON object
add API that will take a JSON object directly.

Commit ce745914 introduced detection of actual video ram sizes to fix migration
if QEMU decide to modify the values provided by libvirt.  This works perfectly
for domains with number of video devices up to two.

If there are more than two video devices in the guest all the secondary devices
in the XML will have the same memory values.  This is because our current code
search for QOM device path only by the device type name and all the secondary
video devices has the same name "qxl".

This patch introduces a new search function that will try to search a QOM device
path using also device's alias if the alias is available. After that it will
fallback to the old recursive code if the alias search found no results.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1358728Signed-off-by: NPavel Hrdina <phrdina@redhat.com>

qemuMonitorMigrationParams is a better name for a structure which
contains various migration parameters. While doing that, we should use
full names for individual parameters.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

This patch splits qemuMonitorJSONGetCPUx86Data in three functions:

- qemuMonitorJSONCheckCPUx86 checks if QEMU supports reporting CPUID
  features for a guest CPU

- qemuMonitorJSONParseCPUx86Features parses CPUID features from a JSON
  array

- qemuMonitorJSONGetCPUx86Data gets the requested guest CPU property
  from QOM and uses qemuMonitorJSONParseCPUx86Features to parse it
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

The caller is already aware that the params are missing and the
extractor is ignoring the missing ones so the parameter isn't necessary.

It was only called for QEMUs without QEMU_CAPS_DEVICE,
which we no longer support.

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

Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

We had both and the only difference was that the latter also included
information about multifunction setting.  The problem with that was that
we couldn't use functions made for only one of the structs (e.g.
parsing).  To consolidate those two structs, use the one in virpci.h,
include that in domain_conf.h and add the multifunction member in it.
Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

Code was obsoleted by using -device.

QEMU introduced the query-gic-capabilities QMP command
with commit 4468d4e0f383: use the command, if available,
to probe available GIC capabilities.

The information obtained is stored in a virQEMUCaps
instance, and will be later used to fill in a
virDomainCaps instance.

Signed-off-by: NShaoHe Feng <shaohe.feng@intel.com>
Signed-off-by: NNikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>

qemu won't ever add those functions directly to QMP. They will be
replaced with 'blockdev-add' and 'blockdev-del' eventually. At this time
there's no need to keep the stubs around.

Additionally the drive_del stub in JSON contained dead code in the
attempt to report errors. (VIR_ERR_OPERATION_UNSUPPORTED was never
reported). Since the text impl does have the same message it is reported
anyways.

Signed-off-by: NCristian Klein <cristiklein@gmail.com>
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

This attribute is used to extend secondary PCI bar and expose it to the
guest as 64bit memory.  It works like this: attribute vram is there to
set size of secondary PCI bar and guest sees it as 32bit memory,
attribute vram64 can extend this secondary PCI bar.  If both attributes
are used, guest sees two memory bars, both address the same memory, with
the difference that the 32bit bar can address only the first part of the
whole memory.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1260749Signed-off-by: NPavel Hrdina <phrdina@redhat.com>

The structure actually contains migration statistics rather than just
the status as the name suggests. Renaming it as
qemuMonitorMigrationStats removes the confusion.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

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

Earlier virtType was of type int. After, introducing the enum VIR_DOMAIN_VIRT_NONE,
the type of virtType is modified to virDomainVirtType.

Now that qemuMonitorGetAllBlockStatsInfo collects also wr_highest_offset
the whole function can be killed.

"query-block-jobs" QMP command returns all running block jobs at once,
while qemuMonitorBlockJobInfo would only report one. This is not very
nice in case we need to check several block jobs. This patch refactors
the monitor code to always parse all block jobs and store them in a
hash.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

All the callers use "/" anyway.

When traversing through the QOM tree, we're looking for
a link to a device, e.g.:
link<virtio-balloon-pci>

Introduce a helper that will format the link name at the start,
instead of doing it every time while recursing through the tree.

This function is specific to the JSON monitor.

Since it now handles only block pull code paths we can refactor it and
remove tons of cruft.

Sacrifice a few lines of code in favor of the code being more readable.

qemuDomainBlockJobImpl become an unmaintainable mess over the years of
adding new stuff to it. This patch starts splitting up individual
functions from it until it can be killed entirely.

In bulk this will add lines of code rather than delete them but it will
be traded for maintainability.

There are two leftover unused variables. Remove them and clean up the
fallout of the change.

It only deals with a single thread.

When using 'dimm' memory devices with qemu, some of the information
like the slot number and base address need to be reloaded from qemu
after process start so that it reflects the actual state. The state then
allows to use memory devices across migrations.

https://bugzilla.redhat.com/show_bug.cgi?id=1199182 documents that
after a series of disk snapshots into existing destination images,
followed by active commits of the top image, it is possible for
qemu 2.2 and earlier to end up tracking a different name for the
image than what it would have had when opening the chain afresh.
That is, when starting with the chain 'a <- b <- c', the name
associated with 'b' is how it was spelled in the metadata of 'c',
but when starting with 'a', taking two snapshots into 'a <- b <- c',
then committing 'c' back into 'b', the name associated with 'b' is
now the name used when taking the first snapshot.

Sadly, older qemu doesn't know how to treat different spellings of
the same filename as identical files (it uses strcmp() instead of
checking for the same inode), which means libvirt's attempt to
commit an image using solely the names learned from qcow2 metadata
fails with a cryptic:

error: internal error: unable to execute QEMU command 'block-commit': Top image file /tmp/images/c/../b/b not found

even though the file exists.  Trying to teach libvirt the rules on
which name qemu will expect is not worth the effort (besides, we'd
have to remember it across libvirtd restarts, and track whether a
file was opened via metadata or via snapshot creation for a given
qemu process); it is easier to just always directly ask qemu what
string it expects to see in the first place.

As a safety valve, we validate that any name returned by qemu
still maps to the same local file as we have tracked it, so that
a compromised qemu cannot accidentally cause us to act on an
incorrect file.

* src/qemu/qemu_monitor.h (qemuMonitorDiskNameLookup): New
prototype.
* src/qemu/qemu_monitor_json.h (qemuMonitorJSONDiskNameLookup):
Likewise.
* src/qemu/qemu_monitor.c (qemuMonitorDiskNameLookup): New function.
* src/qemu/qemu_monitor_json.c (qemuMonitorJSONDiskNameLookup)
(qemuMonitorJSONDiskNameLookupOne): Likewise.
* src/qemu/qemu_driver.c (qemuDomainBlockCommit)
(qemuDomainBlockJobImpl): Use it.
Signed-off-by: NEric Blake <eblake@redhat.com>

The functions and their QMP and HMP implementations are no longer needed
since everything is now done via the *AllStats functions.

Allocate the hash table in the monitor wrapper function instead of the
worker itself so that the text monitor impl that will be added in the
next patch doesn't have to duplicate it.