Format the mediated devices on the qemu command line as
-device vfio-pci,sysfsdev='/path/to/device/in/syfs'.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
Since mdevs are just another type of VFIO devices, we should increase
the memory locking limit the same way we do for VFIO PCI devices.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
As goes for all the other hostdev device types, grant the qemu process
access to /dev/vfio/<mediated_device_iommu_group>.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
Keep track of the assigned mediated devices the same way we do it for
the rest of hostdevs. Methods like 'Prepare', 'Update', and 'ReAttach'
are introduced by this patch.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
So far, the official support is for x86_64 arch guests so unless a
different device API than vfio-pci is available let's only turn on
support for PCI address assignment. Once a different device API is
introduced, we can enable another address type easily.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
This merely introduces virDomainHostdevMatchSubsysMediatedDev method that
is supposed to check whether device being cold-plugged does not already
exist in the domain configuration.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
This patch updates all of our security driver to start labeling the
VFIO IOMMU devices under /dev/vfio/ as well.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
A mediated device will be identified by a UUID (with 'model' now being
a mandatory <hostdev> attribute to represent the mediated device API) of
the user pre-created mediated device. We also need to make sure that if
user explicitly provides a guest address for a mdev device, the address
type will be matching the device API supported on that specific mediated
device and error out with an incorrect XML message.
The resulting device XML:
<devices>
<hostdev mode='subsystem' type='mdev' model='vfio-pci'>
<source>
<address uuid='c2177883-f1bb-47f0-914d-32a22e3a8804'>
</source>
</hostdev>
</devices>
Signed-off-by: Erik Skultety <eskultet@redhat.com>
Beside creation, disposal, getter, and setter methods the module exports
methods to work with lists of mediated devices.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
Just to make the code a bit cleaner, move hostdev specific post parse
code to its own function just in case it grows in the future.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
Just a tiny wrapper over the SCSI def clearing logic to drop some
if-else branches from a switch, mainly because extending the switch in
the future would render the current code with branching less readable.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
Enforce virDomainHostdevSubsysType checking during compilation. Again,
one of a few spots in our code where we should enforce the typecast to
the enum type, thus not forgetting to update *all* switch occurrences
dealing with the give enum.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
We keep forgetting that older setups don't like 'index':
CC util/libvirt_util_la-virsysinfo.lo
cc1: warnings being treated as errors
util/virstoragefile.c: In function 'virStorageSourceFindByNodeName':
util/virstoragefile.c:3804: error: declaration of 'index' shadows a global declaration [-Wshadow]
/usr/include/string.h:489: error: shadowed declaration is here [-Wshadow]
Signed-off-by: Eric Blake <eblake@redhat.com>
This way more drivers can utilize the functionality without copying
the code. And we can therefore test it in one place for all of them.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
That file has only two exported files and each one of them has
different naming. virNode is what all the other files use, so let's
use it. It wasn't used before because the clash with public API
naming, so let's fix that by shortening the name (there is no other
private variant of it anyway).
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
There is no "node driver" as there was before, drivers have to do
their own ACL checking anyway, so they all specify their functions and
nodeinfo is basically just extending conf/capablities. Hence moving
the code to src/conf/ is the right way to go.
Also that way we can de-duplicate some code that is in virsysfs and/or
virhostcpu that got duplicated during the virhostcpu.c split. And
Some cleanup is done throughout the changes, like adding the vir*
prefix etc.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
There is no reason for it not to be in the utils, all global symbols
under that file already have prefix vir* and there is no reason for it
to be part of DRIVER_SOURCES because that is just a leftover from
older days (pre-driver modules era, I believe).
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
While on that, drop support for kernels from RHEL-5 era (missing
cpu/present file). Also add some useful functions and export them.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
By using this we are able to easily switch the sysfs path being
used (fake it). This will not only help tests in the future but can
be also used from files where the code is duplicated currently.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
These helpers are doing just a read and covert the value, but they
properly size the read limit, handle additional whitespace characters,
and unify error reporting.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Commits eaf18f4c2b and 86dd9fac0f separated util/host{cpu,mem}
stuff from nodeinfo, but did not adjust the syms file.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
It is everywhere else. I even remember one of our scripts failing if
the newline is missing, but it doesn't happen currently.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Don't leak guest if adding it to virCapabilities fails. Also return
NULL and not pointer to free'd object with zero references in such
case.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Guests are handled in callers, but if something goes wrong (when it
cannot be added to virCapabilities, for example), there's no way for
them to free it properly.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Both QEMU and bhyve are using the same function for setting up the CPU
in virCapabilities, so de-duplicate it, save code and time, and help
other drivers adopt it.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
STREQ_NULLABLE returns true if both parameters are NULL. And that's
not what we want here. We just want to skop comparing source nodes
that don't have that info set. The function wouldn't make much sense
with nodeName == NULL, so we don't need to check that. Moreover, the
function's declaration uses ATTRIBUDE_NONNULL for nodeName, which not
only means that function expects the parameter not to be NULL, but
actually tells the compiler that it can optimize out the NULL checks.
That way it could end up calling strcmp on NULL (either nodeformat or
nodebacking). GCC figures this out if libvirt is compiled with
lv_cv_static_analysis=yes, unfortunately not everyone uses that.
Caused by cbc6d53513.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Management tools may want to check whether the threshold is still set if
they missed an event. Add the data to the bulk stats API where they can
also query the current backing size at the same time.
To allow updating stats based on the node name, add a helper function
that will fetch the required data from 'query-named-block-nodes' and
return it in hash table for easy lookup.
Detect the node names when setting block threshold and when reconnecting
or when they are cleared when a block job finishes. This operation will
become a no-op once we fully support node names.
To allow matching the node names gathered via 'query-named-block-nodes'
we need to query and then use the top level nodes from 'query-block'.
Add the data to the structure returned by qemuMonitorGetBlockInfo.
qemu for some time already sets node names automatically for the block
nodes. This patch adds code that attempts a best-effort detection of the
node names for the backing chain from the output of
'query-named-block-nodes'. The only drawback is that the data provided
by qemu needs to be matched by the filename as seen by qemu and thus
if two disks share a single backing store file the detection won't work.
This will allow us to use qemu commands such as
'block-set-write-threshold' which only accepts node names.
In this patch only the detection code is added, it will be used later.
Add monitor tooling for calling query-named-block-nodes. The monitor
returns the data as the raw JSON array that is returned from the
monitor.
Unfortunately the logic to extract the node names for a complete backing
chain will be so complex that I won't be able to extract any meaningful
subset of the data in the monitor code.
The code is currently simple, but if we later add node names, it will be
necessary to generate the names based on the node name. Add a helper so
that there's a central point to fix once we add self-generated node
names.
The event is fired when a given block backend node (identified by the
node name) experiences a write beyond the bound set via
block-set-write-threshold QMP command. This wires up the monitor code to
extract the data and allow us receiving the events and the capability.
When using thin provisioning, management tools need to resize the disk
in certain cases. To avoid having them to poll disk usage introduce an
event which will be fired when a given offset of the storage is written
by the hypervisor. Together with the API which will be added later, it
will allow registering thresholds for given storage backing volumes and
this event will then notify management if the threshold is exceeded.
The function has very specific semantics. Split out the part that parses
the backing store specification string into a separate helper so that it
can be reused later while keeping the wrapper with existing semantics.
Note that virStorageFileParseChainIndex is pretty well covered by the
test suite.
Along with video and VNC support, bhyve has introduced USB tablet
support as an input device. This tablet is exposed to a guest
as a device on an XHCI controller.
At present, tablet is the only supported device on the XHCI controller
in bhyve, so to make things simple, it's allowed to only have a
single XHCI controller with a single tablet device.
In detail, this commit:
- Introduces a new capability bit for XHCI support in bhyve
- Adds an XHCI controller and tabled support with 1:1 mapping
between them
- Adds a couple of unit tests
There are a number of functions in bhyve_capabilities.c that probe
hypervisor capabilities by executing the bhyve(1) binary with the
specific device arugment, checking error message (if any) and setting
proper capability bit. As those are extremely similar, move this logic
into a helper function and convert existing functions to use that.
* Extract filling bhyve capabilities from virBhyveDomainCapsBuild()
into a new function virBhyveDomainCapsFill() to make testing
easier by not having to mock firmware directory listing and
hypervisor capabilities probing
* Also, just presence of the firmware files is not sufficient
to enable os.loader.supported, hypervisor should support UEFI
boot too
* Add tests to domaincapstest for the main caps possible flows:
- when UEFI bootrom is supported
- when video (fbus) is supported
- neither of above is supported
qemuMigrationResetTLS() does not initialize 'ret' by default,
so when it jumps to 'cleanup' on error, the 'ret' variable will be
uninitialized, which clang complains about.
Set it to '-1' by default.
https://bugzilla.redhat.com/show_bug.cgi?id=1300769
If the migration flags indicate this migration will be using TLS,
then while we have connection in the Begin phase check and setup the
TLS environment that will be used by virMigrationRun during the Perform
phase for the source to configure TLS.
Processing adds an "-object tls-creds-x509,endpoint=client,..." and
possibly an "-object secret,..." to handle the passphrase response.
Then it sets the 'tls-creds' and possibly 'tls-hostname' migration
parameters.
The qemuMigrateCancel will clean up and reset the environment as it
was originally found.
Signed-off-by: John Ferlan <jferlan@redhat.com>
If the migration flags indicate this migration will be using TLS,
then set up the destination during the prepare phase once the target
domain has been started to add the TLS objects to perform the migration.
This will create at least an "-object tls-creds-x509,endpoint=server,..."
for TLS credentials and potentially an "-object secret,..." to handle the
passphrase response to access the TLS credentials. The alias/id used for
the TLS objects will contain "libvirt_migrate".
Once the objects are created, the code will set the "tls-creds" and
"tls-hostname" migration parameters to signify usage of TLS.
During the Finish phase we'll be sure to attempt to clear the
migration parameters and delete those objects (whether or not they
were created). We'll also perform the same reset during recovery
if we've reached FINISH3.
If the migration isn't using TLS, then be sure to check if the
migration parameters exist and clear them if so.
Add an asyncJob argument for add/delete TLS Objects. A future patch will
add/delete TLS objects from a migration which may have a job to join.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Add the fields to support setting tls-creds and tls-hostname during
a migration (either source or target). Modify the query migration
function to check for the presence and set the field for future
consumers to determine which of 3 conditions is being met (NULL,
present and set to "", or present and sent to something). These
correspond to qemu commit id '4af245dc3' which added support to
default the value to "" and allow setting (or resetting) to ""
in order to disable. This reset option allows libvirt to properly
use the tls-creds and tls-hostname parameters.
Modify code paths that either allocate or use stack space in order
to call qemuMigrationParamsClear or qemuMigrationParamsFree for cleanup.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Add a new TLS X.509 certificate type - "migrate". This will handle the
creation of a TLS certificate capability (and possibly repository) to
be used for migrations. Similar to chardev's, credentials will be handled
via a libvirt secrets; however, unlike chardev's enablement and usage
will be via a CLI flag instead of a conf flag and a domain XML attribute.
The migrations using the *x509_verify flag require the client-cert.pem
and client-key.pem files to be present in the TLS directory - so let's
also be sure to note that in the qemu.conf file.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Fix typo in virNetDevPFGetVF() stub:
ATTRUBUTE_UNUSED -> ATTRIBUTE_UNUSED.
While here, use common indent style for arguments in
virNetDevGetVirtualFunctionIndex() stub.
If the variable store (<nvram>) file is raw qemu can't do a snapshot of
it and thus the snapshot fails. QEMU rejects such snapshot by a message
which would not be properly interpreted as an error by libvirt.
Additionally allowing to use a qcow2 variable store backing file would
solve this issue but then it would become eligible to become target of
the memory dump.
Offline internal snapshot would be incomplete too with either storage
format since libvirt does not handle the pflash file in this case.
Forbid such snapshot so that we can avoid problems.
commit 00d28a78 added a check to see if there were any IPv6 routes
added by RA (Router Advertisement) via an interface that had accept_ra
set to something other than "2". The check was being done
unconditionally, but it's only relevant if IPv6 forwarding is going to
be turned on, and that will only happen if the network has an IPv6
address.
Given an SRIOV PF netdev name (e.g. "enp2s0f0") and VF#, this new
function returns the netdev name of the referenced VF device
(e.g. "enp2s11f6"), or NULL if the device isn't bound to a net driver.
We will want to allow silent failure of virNetDevSetMAC() in the case
that the SIOSIFHWADDR ioctl fails with errno == EADDRNOTAVAIL. (Yes,
that is very specific, but we really *do* want a logged failure in all
other circumstances, and don't want to duplicate code in the caller
for the other possibilities).
This patch renames the 3 different virNetDevSetMAC() functions to
virNetDevSetMACInternal(), adding a 3rd arg called "quiet" and making
them static (because this extra control will only be needed within
virnetdev.c). A new global virNetDevSetMAC() is defined that calls
whichever of the three *Internal() functions gets compiled with quiet
= false. Callers in virnetdev.c that want to notice a failure with
errno == EADDRNOTAVAIL and retry with a different strategy rather than
immediately failing, can call virNetDevSetMACInternal(..., true).
This function unbinds a device from its driver, then immediately
rebinds it to its driver again. The code for this new function is just
the 2nd half of virPCIDeviceBindWithDriverOverride(), so that
function's 2nd half is replaced with a call to virPCIDeviceRebind().
...and cleanup the callers to report it when it *is* an error.
In many cases It's useful for virPCIGetNetName() to not log an error
and simply return a NULL pointer when the given device isn't bound to
a net driver (e.g. we're looking at a VF that is permanently bound to
vfio-pci). The existing code would silently return an error in this
case, which could eventually lead to the dreaded "An error occurred
but the cause is unknown" log message.
This patch changes virPCIGetNetName() to still return success if the
device simply isn't bound to a net driver, and adjusts all the callers
that require a non-null netname to check for that condition and log an
error when it happens.
vf in virNetDevMacVLanDeleteWithVPortProfile() is initialized to -1
and never set. It's not set for a good reason - because it doesn't
make sense during macvtap device setup to refer to a VF device as
"PF:VF#". This patch replaces the two uses of "vf" with "-1", and
removes the local variable, so that it's more clear we are always
calling the utility functions with vf set to -1.
This function is only called in two places, and the ifindex,
nltarget_kernel, and getPidFunc args are never used (and never will
be).
ifindex - we always know the name of the device, and never know the
ifindex - if we really did need the ifindex we would have to get it
from the name using virNetDevGetIndex(). In practice, we just send -1
to virNetDevSetVfConfig(), which doesn't bother to learn the real
ifindex (you only need a name *or* an ifindex for the netlink command
to succeed, not both).
nltarget_kernel - messages to set the config of an SRIOV VF will
always go to netlink in the kernel, not to another user process, so
this arg is always true (there are other uses of netlink messages
where the message might need to go to another user process, but never
in the case of RTM_SETLINK for SRIOV).
getPidFunc - this arg is only used if nltarget_kernel is false, and it
never is.
None of this has any functional effect, it just makes it easier to
follow what's happening when virNetDevSetVfConfig() is called.
virNetDevParseVfConfig() assumed that both the MAC address and VLAN
tag pointers were valid, so even if you only wanted one or the other,
you would need a variable to hold the returned value for both. This
patch checks each for a NULL pointer before filling it in.
The source code will check for NULL arguments for 'macvtap_macaddr' and
'vmuuid', so no need for the NONNULL in the prototypes. Following the stack
for both arguments to virNetDevVPortProfileOpSetLink also shows called
functions would handle a NULL value.
Additionally, modified the prototype to use the same 'macvtap_macaddr'
name as the source code for consistency.
Since the code checks 'mgr == NULL' anyway, no need for the prototype
to have the NONNULL arg check. Also add an error message to indicate what
the failure is so that there isn't a failed for some reason error.
Signed-off-by: John Ferlan <jferlan@redhat.com>
The comparison code used STREQ_NULLABLE anyway for both 'drv_name' and
'dom_name', so no need. Add a NULLSTR on the 'dom_name' too.
Signed-off-by: John Ferlan <jferlan@redhat.com>
The comparison code used STREQ_NULLABLE anyway for both 'drv_name' and
'dom_name', so no need. Add a NULLSTR on the 'dom_name' too.
Signed-off-by: John Ferlan <jferlan@redhat.com>
The code checks and handles a NULL 'str', so just remove the NONNULL.
Update the error message to add the NULLSTR() around 'str' also.
Signed-off-by: John Ferlan <jferlan@redhat.com>
The 'mon' argument validity is checked in the QEMU_CHECK_MONITOR for the
following functions, so they don't need the NONNULL on their prototype:
qemuMonitorUpdateVideoMemorySize
qemuMonitorUpdateVideoVram64Size
qemuMonitorGetAllBlockStatsInfo
qemuMonitorBlockStatsUpdateCapacity
Signed-off-by: John Ferlan <jferlan@redhat.com>
The prototype requires not passing a NULL in the parameter and the callers
all would fail far before this code would fail if 'vm' was NULL, so just
remove the check.
Signed-off-by: John Ferlan <jferlan@redhat.com>
The prototype requires a NONNULL argument and the only caller passes in
a non-null parameter. Besides the "else if" condition would deref it anyway.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Since the code checks and handles NULL parameters, remove the NONNULL
from the prototype.
Also fix the comment in the source to reference the right name.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Since the code checks and handles a NULL 'node' before proceeding
there's no need for the prototype with the NONNULL(2).
Signed-off-by: John Ferlan <jferlan@redhat.com>
If a network is destroyed and restarted, or its bridge is changed, any
tap devices that had previously been connected to the bridge will no
longer be connected. As a first step in automating a reconnection of
all tap devices when this happens, this patch modifies
networkNotifyActualDevice() (which is called once for every
<interface> of every active domain whenever libvirtd is restarted) to
reconnect any tap devices that it finds disconnected.
With this patch in place, you will need to restart libvirtd to
reconnect all the taps to their proper bridges. A future patch will
add a callback that hypervisor drivers can register with the network
driver to that the network driver can trigger this behavior
automatically whenever a network is started.
This patch splits out the part of virNetDevTapCreateInBridgePort()
that would need to be re-done if an existing tap device had to be
re-attached to a bridge, and puts it into a separate function. This
can be used both when an existing domain interface config is updated
to change its connection, and also to re-attach to the "same" bridge
when a network has been stopped and restarted. So far it is used for
nothing.
This function provides the bridge/bond device that the given network
device is attached to. The return value is 0 or -1, and the master
device is a char** argument to the function - this is needed in order
to allow for a "success" return from a device that has no master.
The only reason that the ethtool features weren't being retrieved in
an unprivileged libvirtd was because they required ioctl(), and the
ioctl was using an AF_PACKET socket, which requires root. Now that we
are using AF_UNIX for ioctl(), this restriction can be removed.
The exact family of the socket created for the fd used by ioctl(7)
doesn't matter, it just needs to be a socket and not a file. But for
some reason when macvtap support was added, it used
AF_PACKET/SOCK_DGRAM sockets for its ioctls; we later used the same
AF_PACKET/SOCK_DGRAM socket for new ioctls we added, and eventually
modified the other pre-existing ioctl sockets (for creating/deleting
bridges) to also use AF_PACKET/SOCK_DGRAM (that code originally used
AF_UNIX/SOCK_STREAM).
The problem with using AF_PACKET (intended for sending/receiving "raw"
packets, i.e. packets that can be some protocol other than TCP or UDP)
is that it requires root privileges. This meant that none of the
ioctls in virnetdev.c or virnetdevip.c would work when running
libvirtd unprivileged.
This packet solves that problem by changing the family to AF_UNIX when
creating the socket used for any ioctl().
For some drivers the domain's machine type makes no sense. They
just don't use it. A great example is bhyve driver. Therefore it
makes very less sense to report machine in domain capabilities
XML.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
When enabling IPv6 on all interfaces, we may get the host Router
Advertisement routes discarded. To avoid this, the user needs to set
accept_ra to 2 for the interfaces with such routes.
See https://www.kernel.org/doc/Documentation/networking/ip-sysctl.txt
on this topic.
To avoid user mistakenly losing routes on their hosts, check
accept_ra values before enabling IPv6 forwarding. If a RA route is
detected, but neither the corresponding device nor global accept_ra
is set to 2, the network will fail to start.
virNetlinkCommand() processes only one response message, while some
netlink commands, like route dumping, need to process several.
Add virNetlinkDumpCommand() as a virNetlinkCommand() sister.
Allow to reuse as much as possible from virNetlinkCommand(). This
comment prepares for the introduction of virNetlinkDumpCommand()
only differing by how it handles the responses.
Commit id '85af0b8' added a 'timeout' as the 4th parameter to
qemuMonitorOpen, but neglected to update the ATTRIBUTE_NONNULL(4)
to be (5) for the cb parameter.
It was pointed out here:
https://bugzilla.redhat.com/show_bug.cgi?id=1331796#c4
that we shouldn't be adding a "no-resolv" to the dnsmasq.conf file for
a network if there isn't any <forwarder> element that specifies an IP
address but no qualifying domain. If there is such an element, it will
handle all DNS requests that weren't otherwise handled by one of the
forwarder entries with a matching domain attribute. If not, then DNS
requests that don't match the domain of any <forwarder> would not be
resolved if we added no-resolv.
So, only add "no-resolv" when there is at least one <forwarder>
element that specifies an IP address but no qualifying domain.
We reported error in caller virQEMUCapsCacheLookupByArch.
So the same error messages in qemuConnectGetDomainCapabilities
is useless.
Signed-off-by: Chen Hanxiao <chenhanxiao@gmail.com>
Calling virCPUUpdateLive on a domain with no guest CPU configuration
does not make sense. Especially when doing so would crash libvirtd.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Use "virStoragePoolObj" as a prefix for any external API in virstorageobj.
Also a couple of functions were local to virstorageobj.c, so remove their
external defs iin virstorageobj.h.
NB: The virStorageVolDef* API's won't change.
Signed-off-by: John Ferlan <jferlan@redhat.com>
In an effort to be consistent with the source module, alter the function
prototypes to follow the similar style of source with the "type" on one
line followed by the function name and arguments on subsequent lines with
with argument getting it's own line.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Alter the format of the code to follow more recent style guidelines of
two empty lines between functions, function decls with "[static] type"
on one line followed by function name with arguments to functions each
on one line.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Move all the StoragePoolObj related API's into their own module
virstorageobj from the storage_conf
Purely code motion at this point, plus adjustments to cleanly build
Signed-off-by: John Ferlan <jferlan@redhat.com>
The log and lock protocol don't have an extra handshake to close the
connection. Instead they just close the socket. Unfortunately that
resulted into a lot of spurious garbage logged to the system log files:
2017-03-17 14:00:09.730+0000: 4714: error : virNetSocketReadWire:1800 : End of file while reading data: Input/output error
or in the journal as:
Mar 13 16:19:33 xxxx virtlogd[32360]: End of file while reading data: Input/output error
Use the new facility in the netserverclient to suppress the IO error
report from the virNetSocket layer.
When starting a domain with custom guest CPU specification QEMU may add
or remove some CPU features. There are several reasons for this, e.g.,
QEMU/KVM does not support some requested features or the definition of
the requested CPU model in libvirt's cpu_map.xml differs from the one
QEMU is using. We can't really avoid this because CPU models are allowed
to change with machine types and libvirt doesn't know (and probably
doesn't even want to know) about such changes.
Thus when we want to make sure guest ABI doesn't change when a domain
gets migrated to another host, we need to update our live CPU definition
according to the CPU QEMU created. Once updated, we will change CPU
checking to VIR_CPU_CHECK_FULL to make sure the virtual CPU created
after migration exactly matches the one on the source.
https://bugzilla.redhat.com/show_bug.cgi?id=822148https://bugzilla.redhat.com/show_bug.cgi?id=824989
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
qemuMonitorGetGuestCPU can now optionally create CPU data from
filtered-features in addition to feature-words.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
The checks are now in a dedicated qemuProcessVerifyHypervFeatures
function.
In addition to moving the code this patch also fixes a few bugs: the
original code was leaking cpuFeature and the return value of
virCPUDataCheckFeature was not checked properly.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
The attribute can be used to request a specific way of checking whether
the virtual CPU matches created by the hypervisor matches the
specification in domain XML.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
The disk tuning group parameter is ignored by qemu if no other
throttling options are set. Reject such configuration, since the name
would not be honored after setting parameters via the live tuning API.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1433180
When checking capabilities for qemu we need to check whether subsets of
the disk throttling settings are supported. Extract the checks into a
separate functions as they will be reused in next patch.
While the code path that queries the monitor allocates a separate copy
of the 'group_name' string the path querying the config would not copy
it. The call to virTypedParameterAssign would then steal the pointer
(without clearing it) and the RPC layer freed it. Any subsequent call
resulted into a crash.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1433183
ioh3420 is emulated Intel hardware, so it always looked
quite out of place in aarch64/virt guests. Even for x86/q35
guests, the recently-introduced pcie-root-port is a better
choice because, unlike ioh3420, it doesn't require IO space
(a fairly constrained resource) to work.
If pcie-root-port is available in QEMU, use it; ioh3420 is
still used as fallback for when pcie-root-port is not
available.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1408808
QEMU 2.9 introduces the pcie-root-port device, which is
a generic version of the existing ioh3420 device.
Make the new device available to libvirt users.
If the SASL config does not have any mechanisms we currently
just report an empty list to the client which will then
fail to identify a usable mechanism. This is a server config
error, so we should fail immediately on the server side.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Linux still defaults to a 1024 open file handle limit. This causes
scalability problems for libvirtd / virtlockd / virtlogd on large
hosts which might want > 1024 guest to be running. In fact if each
guest needs > 1 FD, we can't even get to 500 guests. This is not
good enough when we see machines with 100's of physical cores and
TBs of RAM.
In comparison to other memory requirements of libvirtd & related
daemons, the resource usage associated with open file handles
is essentially line noise. It is thus reasonable to increase the
limits unconditionally for all installs.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
There were couple of reports on the list (e.g. [1]) that guests
with huge amounts of RAM are unable to start because libvirt
kills qemu in the initialization phase. The problem is that if
guest is configured to use hugepages kernel has to zero them all
out before handing over to qemu process. For instance, 402GiB
worth of 1GiB pages took around 105 seconds (~3.8GiB/s). Since we
do not want to make the timeout for connecting to monitor
configurable, we have to teach libvirt to count with this
fact. This commit implements "1s per each 1GiB of RAM" approach
as suggested here [2].
1: https://www.redhat.com/archives/libvir-list/2017-March/msg00373.html
2: https://www.redhat.com/archives/libvir-list/2017-March/msg00405.html
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
While connecting to qemu monitor, the first thing we do is wait
for it to show up. However, we are doing it with some timeout to
avoid indefinite waits (e.g. when qemu doesn't create the monitor
socket at all). After beaa447a29 we are using exponential back
off timeout meaning, after the first connection attempt we wait
1ms, then 2ms, then 4 and so on. This allows us to bring down
wait time for small domains where qemu initializes quickly.
However, on the other end of this scale are some domains with
huge amounts of guest memory. Now imagine that we've gotten up to
wait time of 15 seconds. The next one is going to be 30 seconds,
and the one after that whole minute. Well, okay - with current
code we are not going to wait longer than 30 seconds in total,
but this is going to change in the next commit.
The exponential back off is usable only for first few iterations.
Then it needs to be caped (one second was chosen as the limit)
and switch to constant wait time.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
