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 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: John Ferlan <jferlan@redhat.com>
Signed-off-by: Pavel 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: John Ferlan <jferlan@redhat.com>
This function for some weird reason returns integer instead of
virDomainNetType type. It is important to return the correct type
so that we know what values we can expect.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
This initially started as a fix of some debug printing in
virCgroupDetect. However it turned out that other places suffer
from the similar problem. While dealing with pids, esp. in cases
where we cannot use pid_t for ABI stability reasons, we often
chose an unsigned integer type. This makes no sense as pid_t is
signed.
Also, new syntax-check rule is introduced so we won't repeat this
mistake.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Before this patch we've checked qemu capabilities for video devices
only while constructing qemu command line using "-device" option.
Since we support qemu only if "-device" option is present we can use
the same capabilities to check also video devices while using "-vga"
option to construct qemu command line.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
This patch simplifies QEMU capabilities for QXL video device. QEMU
exposes this device as *qxl-vga* and *qxl* and they are both the same
device with the same set of parameters, the only difference is that
*qxl-vga* includes VGA compatibility.
Based on QEMU code they are tied together so it's safe to check only for
presence of only one of them.
This patch also removes an invalid test case "video-qxl-sec-nodevice"
where there is only *qxl-vga* device and *qxl* device is not present.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
If attaching to a qemu process fails after opening the monitor socket
libvirt does not clean up the monitor. As the monitor also holds a
reference to the domain object the qemu attach API basically leaks it.
QEMU also does not interact on a second monitor connection and thus a
further attempt to attach to it would lock up.
Prevent libvirt from leaking the monitor by explicitly closing it.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1378401
The current code that validates duplicate vcpu order would not work
properly if the order would exceed def->maxvcpus. Limit the order to the
interval described.
The bitmap indexes for the order duplicate check are shifted to 0 since
vcpu order 0 is not allowed. The error message doesn't need such
treating though.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1370360
The reworked API is now called virCPUUpdate and it should change the
provided CPU definition into a one which can be consumed by the QEMU
command line builder:
- host-passthrough remains unchanged
- host-model is turned into custom CPU with a model and features
copied from host
- custom CPU with minimum match is converted similarly to host-model
- optional features are updated according to host's CPU
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
qemu_command.c should deal with translating our domain definition into a
QEMU command line and nothing else.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
We have a few of senarios that libvirtd would invoke qemuProcessStop
and leave a "shutting down" in /var/log/libvirt/qemu/$DOMAIN.log.
The shutoff reason showing in debug log is also very important
for us to know why VM shutting down in domain log,
as we seldom enable debug log of libvirtd.
Signed-off-by: Chen Hanxiao <chenhanxiao@gmail.com>
The code for replacing domain's transient definition with the persistent
one is repeated in several places and we'll need to add one more. Let's
make a nice helper for it.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Similarly to vcpu hotplug the emulator thread cgroup numa mapping needs
to be relaxed while hot-adding vcpus so that the threads can allocate
data in the DMA zone.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1370084
Currently the QEMU processes inherit their core dump rlimit
from libvirtd, which is really suboptimal. This change allows
their limit to be directly controlled from qemu.conf instead.
Add support for using the new approach to hotplug vcpus using device_add
during startup of qemu to allow sparse vcpu topologies.
There are a few limitations imposed by qemu on the supported
configuration:
- vcpu0 needs to be always present and not hotpluggable
- non-hotpluggable cpus need to be ordered at the beginning
- order of the vcpus needs to be unique for every single hotpluggable
entity
Qemu also doesn't really allow to query the information necessary to
start a VM with the vcpus directly on the commandline. Fortunately they
can be hotplugged during startup.
The new hotplug code uses the following approach:
- non-hotpluggable vcpus are counted and put to the -smp option
- qemu is started
- qemu is queried for the necessary information
- the configuration is checked
- the hotpluggable vcpus are hotplugged
- vcpus are started
This patch adds a lot of checking code and enables the support to
specify the individual vcpu element with qemu.
The vcpu order information is extracted only for hotpluggable entities,
while vcpu definitions belonging to the same hotpluggable entity need
to all share the order information.
We also can't overwrite it right away in the vcpu info detection code as
the order is necessary to add the hotpluggable vcpus enabled on boot in
the correct order.
The helper will store the order information in places where we are
certain that it's necessary.
Similarly to devices the guest may allow unplug of the VCPU if libvirt
is down. To avoid problems, refresh the vcpu state on reconnect. Don't
mess with the vcpu state otherwise.
The code that setups listen types may change a listen type from address to
socket based on configuration from qemu.conf. This needs to be done before we
reserve/allocate ports that won't be used.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1364843
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Ports are valid only for listen types 'address' and 'network', other listen
types doesn't use them so we should not try to reserve any ports.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
The first argument should be const char ** instead of
char **, because this is a search function and as such it
doesn't, and shouldn't, alter the haystack in any way.
This change means we no longer have to cast arrays of
immutable strings to arrays of mutable strings; we still
have to do the opposite, though, but that's reasonable.
Call the vcpu thread info validation separately to decrease complexity
of returned values by qemuDomainRefreshVcpuInfo.
This function now returns 0 on success and -1 on error. Certain
failures of qemu to report data are still considered as success. Any
error reported now is fatal.
https://bugzilla.redhat.com/show_bug.cgi?id=1356937
Add support for IOThread quota/bandwidth and period parameters for non
session mode. If in session mode, then error out. Uses all the same
places where {vcpu|emulator|global}_{period|quota} are adjusted and
adds the iothread values.
Move QEMU_DRIVE_HOST_PREFIX into the qemu_alias.c to dissuade future
callers from using it. Create qemuAliasDiskDriveSkipPrefix in order
to handle the current consumers that desire to check if an alias has
the drive- prefix and "get beyond it" in order to get the disk alias.
Rather than pass the disks[i]->info.alias to qemuMonitorSetDrivePassphrase
and then generate the "drive-%s" alias from that, let's use qemuAliasFromDisk
prior to the call to generate the drive alias and then pass that along
thus removing the need to generate the alias from the monitor code.
Until now we simply errored out when the translation from pool+volume
failed. However, we should instead check whether that disk is needed or
not since there is an option for that.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1168453
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Nothing in the code path after the removed call has needs/uses the alias
anyway (as would be the case for command line building or talking to monitor).
The alias is VIR_FREE'd in virDomainDeviceInfoClear which is called for any
device that needs/uses an alias via virDomainDeviceDefFree or virDomainDefFree
as well as during virDomainDeviceInfoFree for host devices.
For persistent domains, the domain definition (including aliases) gets
freed a few screens later when it's replaced with newDef.
For transient domains, the definition is freed/unref'd along with the
virDomainObj a few moments later.
Commit 4a585a88 introduced searching QOM device path by alias, let's use it for
memballoon too. This may speedup the search because in most cases we will find
the correct QOM device path directly by using alias without the need for the
recursion code.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Setting up cgroups and other things for all kinds of threads (the
emulator thread, vCPU threads, I/O threads) was copy-pasted every time
new thing was added. Over time each one of those functions changed a
bit differently. So create one function that does all that setup and
start using it, starting with I/O thread setup. That will shave some
duplicated code and maybe fix some bugs as well.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
In order to use more common code and set up for a future type, modify the
encryption secret to allow the "usage" attribute or the "uuid" attribute
to define the secret. The "usage" in the case of a volume secret would be
the path to the volume as dictated by the backwards compatibility brought
on by virStorageGenerateQcowEncryption where it set up the usage field as
the vol->target.path and didn't allow someone to provide it. This carries
into virSecretObjListFindByUsageLocked which takes the secret usage attribute
value from from the domain disk definition and compares it against the
usage type from the secret definition. Since none of the code dealing
with qcow/qcow2 encryption secrets uses usage for lookup, it's a mostly
cosmetic change. The real usage comes in a future path where the encryption
is expanded to be a luks volume and the secret will allow definition of
the usage field.
This code will make use of the virSecretLookup{Parse|Format}Secret common code.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Some code paths already assume that it is allocated since it was always
allocated by virDomainPerfDefParseXML. Make it member of virDomainDef
directly so that we don't have to allocate it all the time.
This fixes crash when attempting to connect to an existing process via
virDomainQemuAttach since we would not allocate it in that code path.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1350688
The virQEMUDriverConfig object contains lists of
loader:nvram pairs to advertise firmwares supported by
by the driver, and qemu_conf.c contains code to populate
the lists, all of which is useful for other drivers too.
To avoid code duplication, introduce a virFirmware object
to encapsulate firmware details and switch the qemu driver
to use it.
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Move all APIs with a virHostCPU name prefix out into new
util/virhostcpu.h & util/virhostcpu.c files
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
In preparation for moving all the CPU related APIs out of
the nodeinfo file, give them a virHostCPU name prefix.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Nearly all the methods in the nodeinfo file are given a
'const char *sysfs_prefix' parameter to override the
default sysfs path (/sys/devices/system). Every single
caller passes in NULL for this, except one use in the
unit tests. Furthermore this parameter is totally
Linux-specific, when the APIs are intended to be cross
platform portable.
This removes the sysfs_prefix parameter and instead gives
a new method linuxNodeInfoSetSysFSSystemPath for use by
the test suite.
For two of the methods this hardcodes use of the constant
SYSFS_SYSTEM_PATH, since the test suite does not need to
override the path for thos methods.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
VNC graphics already supports sockets but only via 'socket' attribute.
This patch coverts that attribute into listen type 'socket'.
For backward compatibility we need to handle listen type 'socket' and 'socket'
attribute properly to support old XMLs and new XMLs. If both are provided they
have to match, if only one of them is provided we need to be able to parse that
configuration too.
To not break migration back to old libvirt if the socket is provided by user we
need to generate migratable XML without the listen element and use only 'socket'
attribute.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
This moves the socket generation if "vnc_auto_unix_socket" is set.
It also fixes a bug with this config option that we should auto-generate
socket path only if listen type is address and there is no address
specified.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Put it into separate function called qemuDomainPrepareChannel() and call
it from the new qemuProcessPrepareDomain().
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
In commit 1e38ef72 the disk startup policy check was moved prior to the
call to virDomainObjSetDefTransient which dropped the disk from the
config rather than the def to be started which is a bug.
Additionally we'd not report the disk change event for this since the
disk aliases were not set at that point.
Finally 'volume' based disks would not work with startup policy too.
Fix it by moving it back after the definition is copied, aliases are
assigned and disk sources are translated.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1341415
Use qemuDomainLogAppendMessage rather than attempting to open a new
logging context with file descriptors. The new approach allows to log
the message even if qemu is still running at that point which appens
during migration finish phase where qemuProcessStop is killing qemu.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1312188
Since it will not be called from outside of conf we can unexport it too
if we move it to the appropriate place.
Test suite change is necessary since the error will be reported sooner
now.
Validation of qemu process startup requires to know whether the process
is used for a fresh VM or whether it's reloaded from a
snapshot/migration. Pass this information in via a flag rather than
calculating it from a bunch of bools.
Remove the live attribute and mark the definition as transient
whether the domain is runing or not.
There were only two callers left calling with live=false:
* testDomainStartState, where the domain already is active
because we assigned vm->def->id just a few lines above the call
* virDomainObjGetPersistentDef, which now only calls
virDomainObjSetDefTransient for an active domain
Based on some digital archaeology performed by jtomko, it's been determined
that the persistentAddrs variable is no longer necessary...
The variable was added by:
commit 141dea6bc7
CommitDate: 2010-02-12 17:25:52 +0000
Add persistence of PCI addresses to QEMU
Where it was set to 0 on domain startup if qemu did not support the
QEMUD_CMD_FLAG_DEVICE capability, to clear the addresses at shutdown,
because QEMU might make up different ones next time.
As of commit f5dd58a608
CommitDate: 2012-07-11 11:19:05 +0200
qemu: Extended qemuDomainAssignAddresses to be callable from
everywhere.
this was broken, when the persistentAddrs = 0 assignment was moved
inside qemuDomainAssignPCIAddresses and while it pretends to check
for !QEMU_CAPS_DEVICE, its parent qemuDomainAssignAddresses is only
called if QEMU_CAPS_DEVICE is present.
Extract information for all disks and update tray state and source only
for removable drives. Additionally store whether a drive is removable
and whether it has a tray.
Both VNC and SPICE requires the same code to resolve address for listen
type network. Remove code duplication and create a new function that
will be used in qemuProcessSetupGraphics().
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
We support omitting listen attribute of graphics element so we should
also support omitting address attribute of listen element. This patch
also updates libvirt to always add a listen element into domain XML
except for VNC graphics if socket attribute is specified.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Move adding the config listen type=address if there is none in
qemuProcessPrepareDomain and move check for multiple listens to
qemuProcessStartValidate.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Rather than need to call qemuDomainSecretDestroy after any call to
qemuProcessLaunch, let's do the destroy in qemuProcessLaunch since
that's where command line is eventually generated and processed. Once
it's generated, we can clear out the secrets.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Commit id '40d8e2ba3' added the function to qemuProcessStart because
in order to set up some secrets in the future we will need the master
key. However, since the previous patch split the master key creation
into two parts (create just the key and create the file), we can now
call qemuDomainSecretPrepare from qemuProcessPrepareDomain since the
file is not necessary.
Signed-off-by: John Ferlan <jferlan@redhat.com>
A recent review of related changes noted that we should split the creation
(or generation) of the master key into the qemuProcessPrepareDomain and leave
the writing of the master key for qemuProcessPrepareHost.
Made the adjustment and modified some comments to functions that have
changed calling parameters, but didn't change the intro doc.
Signed-off-by: John Ferlan <jferlan@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1139766
Thing is, for some reasons you can have your domain's RTC to be
in something different than UTC. More weirdly, it's not only time
zone what you can shift it of, but an arbitrary value. So, if
domain is configured that way, libvirt will correctly put it onto
qemu cmd line and moreover track it as this offset changes during
domain's life time (e.g. because guest OS decides the best thing
to do is set new time to RTC). Anyway, they way in which this
tracking is implemented is events. But we've got a problem if
change in guest's RTC occurs and the daemon is not running. The
event is lost and we end up reporting invalid value in domain
XML. Therefore, when the daemon is starting up again and it is
reconnecting to all running domains, re-fetch their RTC so the
correct offset value can be computed.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Similar to the qemuDomainSecretDiskPrepare, generate the secret
for the Hostdev's prior to call qemuProcessLaunch which calls
qemuBuildCommandLine. Additionally, since the secret is not longer
added as part of building the command, the hotplug code will need
to make the call to add the secret in the hostdevPriv.
Since this then is the last requirement to pass a virConnectPtr
to qemuBuildCommandLine, we now can remove that as part of these
changes. That removal has cascading effects through various callers.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Rather than needing to pass the conn parameter to various command
line building API's, add qemuDomainSecretPrepare just prior to the
qemuProcessLaunch which calls qemuBuilCommandLine. The function
must be called after qemuProcessPrepareHost since it's expected
to eventually need the domain masterKey generated during the prepare
host call. Additionally, future patches may require device aliases
(assigned during the prepare domain call) in order to associate
the secret objects.
The qemuDomainSecretDestroy is called after the qemuProcessLaunch
finishes in order to clear and free memory used by the secrets
that were recently prepared, so they are not kept around in memory
too long.
Placing the setup here is beneficial for future patches which will
need the domain masterKey in order to generate an encrypted secret
along with an initialization vector to be saved and passed (since
the masterKey shouldn't be passed around).
Finally, since the secret is not added during command line build,
the hotplug code will need to get the secret into the private disk data.
Signed-off-by: John Ferlan <jferlan@redhat.com>
For strange reasons if a perf event type was not supported or failed to
be enabled at VM start libvirt would ignore the failure.
On the other hand on restart if the event could not be re-enabled
libvirt would fail to reconnect to the VM and kill it.
Both don't make really sense. Fix it by failing to start the VM if the
event is not supported and change the event to disabled if it can't be
reconnected (unlikely).
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1329045
Empty floppy drives start with tray in "open" state and libvirt did not
refresh it after startup. The code that inserts media into the tray then
waited until the tray was open before inserting the media and thus
floppies could not be inserted.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1326660
This function - in contrast with qemuBuildCommandLine - merely
constructs our internal command representation of a domain. This
is then later compared against expected output. Or, this function
is used also in virConnectDomainXMLToNative(). But due to a copy
paste error this function, just like its image - has @forceFips
argument that if enabled forces FIPS, otherwise mimics FIPS state
in the host. If FIPS is enabled or forced the generated command
line is different to state in which FIPS is disabled. Problem is,
while this could be desired in the virConnectDomainXMLToNative()
case, this is undesirable in the test suite as it will produce
unpredicted results.
Solution to this is to rename argument to @enableFips to
specifically tell whether we expect command line to be build in
either of fashions and make virConnectDomainXMLToNative()
implementation fetch FIPS state and pass it to
qemuProcessCreatePretendCmd().
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
When creating the master key, we used mode 0600 (which we should) but
because we were creating it as root, the file is not readable by any
qemu running as non-root. Fortunately, it's just a matter of labelling
the file. We are generating the file path few times already, so let's
label it in the same function that has access to the path already.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Rather than trying some magic calculations on our side query the monitor
for the current size of the memory balloon both on hotplug and
hotunplug.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1220702
Since qemu is now able to notify us that the guest rejected the memory
unplug operation we can relay this to the user and make the API fail
right away.
Additionally document the possible values from the ACPI docs for future
reference.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1320447
Similarly to the DEVICE_DELETED event we will be able to tell when
unplug of certain device types will be rejected by the guest OS. Wire up
the device deletion signalling code to allow handling this.
The address assigning code might add new pci bridges.
We need them to have an alias when building the command line.
In real word usage, this is not a problem because all the code
paths already call qemuDomainAssignAddresses. However moving
this call lets us remove one extra call from qemuxml2argvtest.
Essentially revert commit 3a6204c which added these to allow the test
suite to pass without depending on the host system state.
Since commit 4b527c1 we already mock virSCSIDeviceGetSgName, so these
callbacks are useless.
This effectively removes virDomainGraphicsListenSetAddress which was
used only to change the address of listen structure and possible change
the listen type. The new function will auto-expand the listens array
and append a new listen.
The old function was used on pre-allocated array of listens and in most
cases it only "add" a new listen. The two remaining uses can access the
listen structure directly.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
The new perf code didn't bother to clear a pointer in 'priv' causing a
double free or other memory corruption goodness if a VM failed to start.
Clear the pointer after freeing the memory.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1324757
Add a masterKey and masterKeyLen to _qemuDomainObjPrivate to store a
random domain master key and its length in order to support the ability
to encrypt/decrypt sensitive data shared between libvirt and qemu. The
key will be base64 encoded and written to a file to be used by the
command line building code to share with qemu.
New API's from this patch:
qemuDomainGetMasterKeyFilePath:
Return a path to where the key is located
qemuDomainWriteMasterKeyFile: (private)
Open (create/trunc) the masterKey path and write the masterKey
qemuDomainMasterKeyReadFile:
Using the master key path, open/read the file, and store the
masterKey and masterKeyLen. Expected use only from qemuProcessReconnect
qemuDomainGenerateRandomKey: (private)
Generate a random key using available algorithms
The key is generated either from the gnutls_rnd function if it
exists or a less cryptographically strong mechanism using
virGenerateRandomBytes
qemuDomainMasterKeyRemove:
Remove traces of the master key, remove the *KeyFilePath
qemuDomainMasterKeyCreate:
Generate the domain master key and save the key in the location
returned by qemuDomainGetMasterKeyFilePath.
This API will first ensure the QEMU_CAPS_OBJECT_SECRET is set
in the capabilities. If not, then there's no need to generate
the secret or file.
The creation of the key will be attempted from qemuProcessPrepareHost
once the libDir directory structure exists.
The removal of the key will handled from qemuProcessStop just prior
to deleting the libDir tree.
Since the key will not be written out to the domain object XML file,
the qemuProcessReconnect will read the saved file and restore the
masterKey and masterKeyLen.
The paths have the domain ID in them. Without cleaning them, they would
contain the same ID even after multiple restarts. That could cause
various problems, e.g. with access.
Add function qemuDomainClearPrivatePaths() for this as a counterpart of
qemuDomainSetPrivatePaths().
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
We use _LAST items in enums to mark the last position in given
enum. Now, if and enum is passed to switch(), compiler checks
that all the values from enum occur in 'case' enumeration.
Including _LAST. But coverity spots it's a dead code. And it
really is. So to resolve this, we tend to put a comment just
above 'case ..._LAST' notifying coverity that we know this is a
dead code but we want to have it that way.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Commit 7068b56c introduced several hyperv features. Not all hyperv
features are supported by old enough kernels and we shouldn't allow to
start a guest if kernel doesn't support any of the hyperv feature.
There is one exception, for backward compatibility we cannot error out
if one of the RELAXED, VAPIC or SPINLOCKS isn't supported, for the same
reason we ignore invtsc, to not break restoring saved domains with older
libvirt.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
This check is there to allow restore saved domain with older libvirt
where we included invtsc by default for host-passthrough model. Don't
skip the whole function, but only the part that checks for invtsc.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
This patch adds new xml element, and so we can have the option of
also having perf events enabled immediately at startup.
Signed-off-by: Qiaowei Ren <qiaowei.ren@intel.com>
Message-id: 1459171833-26416-6-git-send-email-qiaowei.ren@intel.com
If a user specify network type ethernet, then create it via libvirt and run
script if it provided. After this commit user does not need to
run external script to create tap device or add root permissions to qemu
process.
Signed-off-by: Vasiliy Tolstov <v.tolstov@selfip.ru>
This will skip few steps from qemuProcessStart in order to create only
qemu CMD. Use a VIR_QEMU_PROCESS_START_PRETEND for all the qemuProcess*
functions called by this one to not modify or check host.
This new function will be used later on for XMLToNative API and also for
qemuxml2argvtest to make sure that both API and test uses the same code
as qemuProcessStart.
We need also update qemuProcessInit to wrap few lines of code with check
that VIR_QEMU_PROCESS_START_PRETEND that makes sense only for
qemuProcessStart.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Move all code that checks host and domain. Do not check host if we use
VIR_QEMU_PROCESS_START_PRETEND flag.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Move all code that modifies only live XML to this function. The new
VIR_QEMU_PROCESS_START_PRETEND flag will be used by qemuXMLToNative and
qemuxml2argvtest later in order to reuse the same code as
qemuProcessStart uses.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
The postParse callback is the correct place to generate default values
that should be present in offline XML.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
When migration fails in the post-copy mode, it's impossible to just kill
the destination domain and resume the source since the source no longer
contains current guest state. Let's mark domains on both sides as
VIR_DOMAIN_PAUSED_POSTCOPY_FAILED to let the upper layer decide what to
do with them.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
When destination libvirtd is restarted during migration in Finish phase
just after the point we started guest CPUs, we should not kill the
domain.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Migration enters "postcopy-active" state after QEMU switches to
post-copy and pauses guest CPUs. From libvirt's point of view this state
is similar to "completed" because we need to transfer guest execution to
the destination host.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
If use of virtlogd is enabled, then use it for backing the
character device log files too. This avoids the possibility
of a guest denial of service by writing too much data to
the log file.
With a very old QEMU which doesn't support events we need to explicitly
call qemuMigrationSetOffline at the end of migration to update our
internal state. On the other hand, if we talk to QEMU using QMP, we
should just wait for the STOP event and let the event handler update the
state and trigger a libvirt event.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
qemuProcessSetupEmulator runs at a point in time where there is only
the qemu main thread. Use virCgroupAddTask to put just that one task
into the emulator cgroup. That patch makes virCgroupMoveTask and
virCgroupAddTaskStrController obsolete.
Signed-off-by: Henning Schild <henning.schild@siemens.com>
Move qemuProcessSetupEmulator up under qemuSetupCgroup. That way
we move the one main thread right into the emulator cgroup, instead
of moving multiple threads later on. And we do not actually want any
threads running in the parent cgroups (cpu cpuacct cpuset).
Signed-off-by: Henning Schild <henning.schild@siemens.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=1260749
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Per-domain directories were introduced in order to be able to
completely separate security labels for each domain (commit
f1f68ca334). However when the domain
name is long (let's say a ridiculous 110 characters), we cannot
connect to the monitor socket because on length of UNIX socket address
is limited. In order to get around this, let's shorten it in similar
fashion and in order to avoid conflicts, throw in an ID there as well.
Also save that into the status XML and load the old status XMLs
properly (to clean up after older domains). That way we can change it
in the future.
The shortening can be seen in qemuxml2argv tests, for example in the
hugepages-pages2 case.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
In case you will specify graphics like this:
<graphics type='spice' port='-1'/>
or
<graphics type='spice' port='-1' tlsPort='6000'/>
libvirt will automatically add autoport='no'. This leads to an issue
that in qemuProcessStop() we don't release that port because we are
releasing both port if autoport=yes or only port marked as reserved.
If autoport=no but we request to generate port via '-1' we need to mark
that port as reserved in order to release it.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1299696
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Calling qemuProcessStop without a job opens a way to race conditions
with qemuDomainObjExitMonitor called in another thread. A real world
example of such a race condition:
- migration thread (A) calls qemuMigrationWaitForSpice
- another thread (B) starts processing qemuDomainAbortJob API
- thread B signals thread A via qemuDomainObjAbortAsyncJob
- thread B enters monitor (qemuDomainObjEnterMonitor)
- thread B calls qemuMonitorSend
- thread A awakens and calls qemuProcessStop
- thread A calls qemuMonitorClose and sets priv->mon to NULL
- thread B calls qemuDomainObjExitMonitor with priv->mon == NULL
=> monitor stays ref'ed and locked
Depending on how lucky we are, the race may result in a memory leak or
it can even deadlock libvirtd's event loop if it tries to lock the
monitor to process an event received before qemuMonitorClose was called.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Stopping a domain without a job risks a race condition with another
thread which started a job a which does not expect anyone else to be
messing around with the same domain object.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
When destroying a domain we need to make sure we will be able to start a
job no matter what other operations are running or even stuck in a job.
This is done by killing the domain before starting the destroy job.
Let's introduce qemuProcessBeginStopJob which combines killing a domain
and starting a job in a single API which can be called everywhere we
need a job to stop a domain.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Create new modules qemu_domain_address.c and qemu_domain_address.h to
contain all the new functions and header data. Additionally move any
supporting static functions.
Make qemuDomainSupportsPCI non static.
Also, move and rename the following:
qemuSetSCSIControllerModel to qemuDomainSetSCSIControllerModel
qemuCollectPCIAddress to qemuDomainCollectPCIAddress
qemuValidateDevicePCISlotsPIIX3 to qemuDomainValidateDevicePCISlotsPIIX3
qemuAssignDevicePCISlots to qemuDomainAssignDevicePCISlots
Signed-off-by: John Ferlan <jferlan@redhat.com>
