The memory device alias needs to be treated as machine ABI as qemu is
using it in the migration stream for section labels. To simplify this
generate the alias from the slot number unless an existing broken
configuration is detected.

With this patch the aliases are predictable and even certain
configurations which would not be migratable previously are fixed.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1359135

As with other devices assign the slot number right away when adding the
device. This will make the slot numbers static as we do with other
addressing elements and it will ultimately simplify allocation of the
alias in a static way which does not break with qemu.

Simplify handling of the 'dimm' address element by allowing to specify
the slot number only. This will allow libvirt to allocate slot numbers
before starting qemu.

Even though using /dev/shm/asdf as the backend, we still need to make
the mapping shared.  The original patch forgot to add that parameter.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1392031Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

Propagate the selected or default level to qemu if it's supported.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1376009Signed-off-by: NPrasanna Kumar Kalever <prasanna.kalever@redhat.com>
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>

Add QMP schema data query for aarch64. The gic capabilities are
unfortunately queried after the QMP schema and thus this patch needs to
undo the temporary removal of the declared support for query-qmp-schema.

Note that as a gicv3 machine was not available the schema data is taken
from the gicv2 case. It should be identical since qemu would be built
from the same source.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>

Add QMP schema data query for aarch64. The gic capabilities are
unfortunately queried after the QMP schema and thus this patch needs to
undo the temporary removal of the declared support for query-qmp-schema.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>

Teach qemu driver to detect whether qemu supports specifying debug level
for gluster volumes.
Signed-off-by: NPrasanna Kumar Kalever <prasanna.kalever@redhat.com>
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>

Allow detecting capabilities according to the qemu QMP schema. This is
necessary as sometimes the availability of certain options depends on
the presence of a field in the schema.

This patch adds support for loading the QMP schema when detecting qemu
capabilities and adds a very simple query language to allow traversing
the schema and selecting a certain element from it.

The infrastructure in this patch uses a query path to set a specific
capability flag according to the availability of the given element in
the schema.

Remove the command from the supported commands list temporarily so that
QMP introspection code can be added without breaking tests and having to
tweak the test data in the same commit.

This will be later reverted and test data will be added. The aarch64
code is special as it calls additional commands and thus the test data
can't be added upfront.

Signed-off-by: NPeter Krempa <pkrempa@redhat.com>

Signed-off-by: NPeter Krempa <pkrempa@redhat.com>

Signed-off-by: NPeter Krempa <pkrempa@redhat.com>

Add output of 'query-qmp-schema' to the capabilities test.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>

Sync up to the released version of qemu.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>

Sync up to the released version of qemu.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>

virQEMUCapsLoadCache loads QEMU capabilities from a file, but strangely
enough it returns the loaded QEMU binary ctime in qemuctime parameter
instead of storing it in qemuCaps.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

This is needed in order to migrate a domain with shmem devices as that
is not allowed to migrate.
Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

QEMU added support for ivshmem-plain and ivshmem-doorbell.  Those are
reworked varians of legacy ivshmem that are compatible from the guest
POV, but not from host's POV and have sane specification and handling.

Details about the newer device type can be found in qemu's commit
5400c02b90bb:

  http://git.qemu.org/?p=qemu.git;a=commit;h=5400c02b90bbSigned-off-by: NMartin Kletzander <mkletzan@redhat.com>

We're keeping some things at default and that's not something we want to
do intentionally.  Let's save some sensible defaults upfront in order to
avoid having problems later.  The details for the defaults (of the newer
implementation) can be found in qemu's commit 5400c02b90bb:

  http://git.qemu.org/?p=qemu.git;a=commit;h=5400c02b90bb

Since we are merely saving the defaults it will not change the guest ABI
and thanks to the fact that we're doing it in the PostParse callback it
will not break the ABI stability checks.
Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

The old ivshmem is deprecated in QEMU, so let's use the better
ivshmem-{plain,doorbell} variants instead.
Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

Just the default one now, new ones will be added in following commits.
Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

Support for virtio disks was added in commit id 'fceeeda2', but not for
SCSI drives. Add the secret for the server when hotplugging a SCSI drive.
No need to make any adjustments for unplug since that's handled during
the qemuDomainDetachDiskDevice call to qemuDomainRemoveDiskDevice in
the qemuDomainDetachDeviceDiskLive switch.

Added a test to/for the command line processing to show the command line
options when adding a SCSI drive for the guest.

https://bugzilla.redhat.com/show_bug.cgi?id=1300776

Complete the implementation of support for TLS encryption on
chardev TCP transports by adding the hotplug ability of a secret
to generate the passwordid for the TLS object for chrdev, RNG,
and redirdev.

Fix up the order of object removal on failure to be the inverse
of the attempted attach (for redirdev, chr, rng) - for each the
tls object was being removed before the chardev backend.

Likewise, add the ability to hot unplug that secret object as well
and be sure the order of unplug matches that inverse order of plug.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

Add the secret object so the 'passwordid=' can be added if the command line
if there's a secret defined in/on the host for TCP chardev TLS objects.

Preparation for the secret involves adding the secinfo to the char source
device prior to command line processing. There are multiple possibilities
for TCP chardev source backend usage.

Add test for at least a serial chardev as an example.

Add in the block I/O throttling length/duration parameter to the command
line if supported. If not supported, fail command creation.

Add the xml2argvtest for testing.

Modify _virDomainBlockIoTuneInfo and rng schema to support the _length
options for bps/iops throttling values. Document the new values.

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

Add the capability to detect if the qemu binary can support the feature
to use bps-max-length and friends.

Extended the qemuMonitorCPUInfo with a halted flag. Extract the halted
flag for both text and JSON monitor.
Signed-off-by: NViktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
Signed-off-by: NBoris Fiuczynski <fiuczy@linux.vnet.ibm.com>

Add an optional "tls='yes|no'" attribute for a TCP chardev.

For QEMU, this will allow for disabling the host config setting of the
'chardev_tls' for a domain chardev channel by setting the value to "no" or
to attempt to use a host TLS environment when setting the value to "yes"
when the host config 'chardev_tls' setting is disabled, but a TLS environment
is configured via either the host config 'chardev_tls_x509_cert_dir' or
'default_tls_x509_cert_dir'
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>
Signed-off-by: NPavel Hrdina <phrdina@redhat.com>

Change the virDomainChrDef to use a pointer to 'source' and allocate
that pointer during virDomainChrDefNew.

This has tremendous "fallout" in the rest of the code which mainly
has to change source.$field to source->$field.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

There was inconsistency between alias used to create tls-creds-x509
object and alias used to link that object to chardev while hotpluging.
Hotplug ends with this error:

  error: Failed to detach device from channel-tcp.xml
  error: internal error: unable to execute QEMU command 'chardev-add':
  No TLS credentials with id 'objcharchannel3_tls0'

In XML we have for example alias "serial0", but on qemu command line we
generate "charserial0".

The issue was that code, that creates QMP command to hotplug chardev
devices uses only the second alias "charserial0" and that alias is also
used to link the tls-creds-x509 object.

This patch unifies the aliases for tls-creds-x509 to be always generated
from "charserial0".
Signed-off-by: NPavel Hrdina <phrdina@redhat.com>

Missing the option to set verify-peer to yes
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

The code is entirely correct, but it still managed to trip me
up when I first ran into it because I did not realize right away
that VIR_PCI_CONNECT_TYPES_ENDPOINT was not a single flag, but
rather a mask including both VIR_PCI_CONNECT_TYPE_PCI_DEVICE and
VIR_PCI_CONNECT_TYPE_PCIE_DEVICE.

In order to save the next distracted traveler in PCI Address Land
some time, document this fact with a comment. Add a test case for
the behavior as well.

https://bugzilla.redhat.com/show_bug.cgi?id=1357416

Rather than return a 0 or -1 and the *result string, return just the result
string to the caller.  Alter all the callers to handle the different return.

As a side effect or result of this, it's much clearer that we cannot just
assign the returned string into the scsi_host wwnn, wwpn, and fabric_wwn
fields - rather we should fetch a temporary string, then as long as our
fetch was good, VIR_FREE what may have been there, and STEAL what we just got.
This fixes a memory leak in the virNodeDeviceCreateXML code path through
find_new_device and nodeDeviceLookupSCSIHostByWWN which will continually
call nodeDeviceSysfsGetSCSIHostCaps until the expected wwnn/wwpn is found
in the device object capabilities.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

https://bugzilla.redhat.com/show_bug.cgi?id=1366505

So far, this function lacked support for
VIR_DOMAIN_NET_TYPE_VHOSTUSER leaving callers to hack around the
problem by constructing the command line on their own. This is
not ideal as it blocks hot plug support.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

Currently, what we do for vhost-user network is generate the
following part of command line:

-netdev type=vhost-user,id=hostnet0,chardev=charnet0

There's no need for 'type=' it is the default. Drop it.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

The idea is to have function that does some checking of the
arguments at its beginning and then have one big switch for all
the interface types it supports. Each one of them generating the
corresponding part of the command line.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>