https://bugzilla.redhat.com/show_bug.cgi?id=920441
Currently, we are discarding listen attribute from qemu cookie even though
we strive to gather it. This result in not so cool bug: if user have
different networks, one for management/migration, and one for VNC/SPICE we
pass incorrect host to the qemu in client_migrate_info. What we actually
pass is remote hostname, while we should be passing remote listen address.
It doesn't matter as long as these two are the same, but they don't need
necessary to be like that.
The helper function to look up disk controller model may be used by scsi
hostdev. But it should be changed to use device info.
Signed-off-by: Han Cheng <hanc.fnst@cn.fujitsu.com>
The virCgroupMounted method is badly named, since a controller can be
mounted, but disabled in the current object. Rename the method to be
virCgroupHasController. Also make it tolerant to a NULL virCgroupPtr
and out-of-range controller index, to avoid duplication of these
checks in all callers
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
To support "shareable" for volume type disk, we have to translate
the source before trying to add the shared disk entry. To achieve
the goal, this moves the helper qemuTranslateDiskSourcePool into
src/qemu/qemu_conf.c, and introduce an internal only member (voltype)
for struct _virDomainDiskSourcePoolDef, to record the underlying
volume type for use when building the drive string.
Later patch will support "shareable" volume type disk.
This adds a new helper qemuTranslateDiskSourcePool which uses the
storage pool/vol APIs to translate the disk source before building
the drive string. Network volume is not supported yet. Disk chain
for volume type disk may be supported later, but before I'm confident
it doesn't break anything, it's just disabled now.
For both "live" and "config" changes of vcpupin and emulatorpin, an
all clear bitmap doesn't make sense, and it can just cause corruptions.
E.g (similar for emulatorpin).
% virsh vcpupin hame 0 8,^8 --config
% virsh vcpupin hame
VCPU: CPU Affinity
----------------------------------
0:
1: 0-63
2: 0-63
3: 0-63
% virsh dumpxml hame | grep cpuset
<vcpupin vcpu='0' cpuset=''/>
% virsh start hame
error: Failed to start domain hame
error: An error occurred, but the cause is unknown
This introduce a new attribute "num_queues" (same with the good name
QEMU uses) for virtio-scsi controller. An example of the XML:
<controller type='scsi' index='0' model='virtio-scsi' num_queues='8'/>
The corresponding QEMU command line:
-device virtio-scsi-pci,id=scsi0,num_queues=8,bus=pci.0,addr=0x3 \
When setting processor count for a domain using the API libvirt enforced
a maximum processor count, while it isn't enforced when taking the XML path.
This patch removes the check to match the XML.
Currently when getting an instance of virCgroupPtr we will
create the path in all cgroup controllers. Only at the virt
driver layer are we attempting to filter controllers. This
is bad because the mere act of creating the dirs in the
controllers can have a functional impact on the kernel,
particularly for performance.
Update the virCgroupForDriver() method to accept a bitmask
of controllers to use. Only create dirs in the controllers
that are requested. When creating cgroups for domains,
respect the active controller list from the parent cgroup
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
This patch refactors various places to allow removing of the
defaultConsoleTargetType callback from the virCaps structure.
A new console character device target type is introduced -
VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_NONE - to mark that no type was
specified in the XML. This type is at the end converted to the standard
VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_SERIAL. Other types that are
different from this default have to be processed separately in the
device post parse callback.
Use the virDomainXMLConf structure to hold this data and tweak the code
to avoid semantic change.
Without configuration the KVM mac prefix is used by default. I chose it
as it's in the privately administered segment so it should be usable for
any purposes.
Use the qemu specific callback to fill this data in the qemu driver as
it's the only place where it was used and fix tests as the qemu test
capability object didn't configure the defaults for the tests.
This patch removes the emulatorRequired field and associated
infrastructure from the virCaps object. Instead the driver specific
callbacks are used as this field isn't enforced by all drivers.
This patch implements the appropriate callbacks in the qemu and lxc
driver and moves to check to that location.
This patch removes the defaultDiskDriverName from the virCaps
structure. This particular default value is used only in the qemu driver
so this patch uses the recently added callback to fill the driver name
if it's needed instead of propagating it through virCaps.
This patch implements the devices post parse callback and uses it to fill
the default qemu network card model into the XML if none is specified.
Libvirt assumes that the network card model for qemu is the "rtl8139".
Record this in the XML using the new callback to avoid user
confusion.
This patch adds instrumentation that will allow hypervisor drivers to
fill and validate domain and device definitions after parsed by the XML
parser.
With this patch, after the XML is parsed, a callback to the driver is
issued requesting to fill and validate driver specific details of the
configuration. This allows to use sensible defaults and checks on a per
driver basis at the time the XML is parsed.
Two callback pointers are stored in the new virDomainXMLConf object:
* virDomainDeviceDefPostParseCallback (devicesPostParseCallback)
- called for a single device parsed and for every single device in a
domain config. A virDomainDeviceDefPtr is passed along with the
domain definition and virCaps.
* virDomainDefPostParseCallback, (domainPostParseCallback)
- A callback that is meant to process the domain config after it's
parsed. A virDomainDefPtr is passed along with virCaps.
Both types of callbacks support arbitrary opaque data passed for the
callback functions.
Errors may be reported in those callbacks resulting in a XML parsing
failure.
This patch is the result of running:
for i in $(git ls-files | grep -v html | grep -v \.po$ ); do
sed -i -e "s/virDomainXMLConf/virDomainXMLOption/g" -e "s/xmlconf/xmlopt/g" $i
done
and a few manual tweaks.
Commit f84b92ea introduced a memory leak on error; John Ferlan reported
that valgrind caught it during 'make check'.
* src/qemu/qemu_command.c (qemuBuildMachineArgStr): Plug leak.
The JSON generator is able to represent only values less than LLONG_MAX, fix the
bandwidth limit checks when converting to value to catch overflows before they
reach the generator.
Mimic the fix done in 02b9097274 to fix crash by
accessing an already freed structure. Also copy the explaining comment why the
pointer can't be accessed any more.
Format the address using the helper instead of having similar code in
multiple places.
This patch also fixes leak of the MAC address string in
ebtablesRemoveForwardAllowIn() and ebtablesAddForwardAllowIn() in
src/util/virebtables.c
Currently, -machine option is used only when dump-guest-core is set.
To use options defined in machine option for newer version of QEMU,
it needs to use -machine xxx, and to be compatible with older version
-M, this patch adds QEMU_CAPS_MACHINE_OPT capability for newer
version which supports -machine option.
Signed-off-by: Li Zhang <zhlcindy@linux.vnet.ibm.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
Reported by Anthony Messina in
https://bugzilla.redhat.com/show_bug.cgi?id=904692
Present since introduction of smartcard support in commit f5fd9baa
* src/qemu/qemu_command.c (qemuBuildCommandLine): Match qemu spelling.
* tests/qemuxml2argvdata/qemuxml2argv-smartcard-host-certificates.args:
Fix broken test.
Allow migration over IPv6 by listening on [::] instead of 0.0.0.0
when QEMU supports it (QEMU_CAPS_IPV6_MIGRATION) and there is
at least one v6 address configured on the system.
Use virURIParse in qemuMigrationPrepareDirect to allow parsing
IPv6 addresses, which would cause an 'incorrect :port' error
message before.
Move setting of migrateFrom from qemuMigrationPrepare{Direct,Tunnel}
after domain XML parsing, since we need the QEMU binary path from it
to get its capabilities.
Bug: https://bugzilla.redhat.com/show_bug.cgi?id=846013
Code added by commit id '523207fe8'
TEST: qemuxml2argvtest
........................................ 40
........................................ 80
........................................ 120
........................................ 160
........................................ 200
........................................ 240
................................. 273 OK
==30993== 39 bytes in 1 blocks are definitely lost in loss record 33 of 87
==30993== at 0x4A0887C: malloc (vg_replace_malloc.c:270)
==30993== by 0x41E501: fakeSecretGetValue (qemuxml2argvtest.c:33)
==30993== by 0x427591: qemuBuildDriveURIString (qemu_command.c:2571)
==30993== by 0x42C502: qemuBuildDriveStr (qemu_command.c:2627)
==30993== by 0x4335FC: qemuBuildCommandLine (qemu_command.c:6443)
==30993== by 0x41E8A0: testCompareXMLToArgvHelper (qemuxml2argvtest.c:154
==30993== by 0x41FE8F: virtTestRun (testutils.c:157)
==30993== by 0x418BE3: mymain (qemuxml2argvtest.c:506)
==30993== by 0x4204CA: virtTestMain (testutils.c:719)
==30993== by 0x38D6821A04: (below main) (in /usr/lib64/libc-2.16.so)
==30993==
==30993== 46 bytes in 1 blocks are definitely lost in loss record 64 of 87
==30993== at 0x4A0887C: malloc (vg_replace_malloc.c:270)
==30993== by 0x38D690A167: __vasprintf_chk (in /usr/lib64/libc-2.16.so)
==30993== by 0x4CB28E7: virVasprintf (stdio2.h:210)
==30993== by 0x4CB29A3: virAsprintf (virutil.c:2017)
==30993== by 0x4275B4: qemuBuildDriveURIString (qemu_command.c:2580)
==30993== by 0x42C502: qemuBuildDriveStr (qemu_command.c:2627)
==30993== by 0x4335FC: qemuBuildCommandLine (qemu_command.c:6443)
==30993== by 0x41E8A0: testCompareXMLToArgvHelper (qemuxml2argvtest.c:154
==30993== by 0x41FE8F: virtTestRun (testutils.c:157)
==30993== by 0x418BE3: mymain (qemuxml2argvtest.c:506)
==30993== by 0x4204CA: virtTestMain (testutils.c:719)
==30993== by 0x38D6821A04: (below main) (in /usr/lib64/libc-2.16.so)
==30993==
==30993== 385 (56 direct, 329 indirect) bytes in 1 blocks are definitely los
==30993== at 0x4A06B6F: calloc (vg_replace_malloc.c:593)
==30993== by 0x4C6B2CF: virAllocN (viralloc.c:152)
==30993== by 0x4C9C7EB: virObjectNew (virobject.c:191)
==30993== by 0x4D21810: virGetSecret (datatypes.c:642)
==30993== by 0x41E5D5: fakeSecretLookupByUsage (qemuxml2argvtest.c:51)
==30993== by 0x4D4BEC5: virSecretLookupByUsage (libvirt.c:15295)
==30993== by 0x4276A9: qemuBuildDriveURIString (qemu_command.c:2565)
==30993== by 0x42C502: qemuBuildDriveStr (qemu_command.c:2627)
==30993== by 0x4335FC: qemuBuildCommandLine (qemu_command.c:6443)
==30993== by 0x41E8A0: testCompareXMLToArgvHelper (qemuxml2argvtest.c:154
==30993== by 0x41FE8F: virtTestRun (testutils.c:157)
==30993== by 0x418BE3: mymain (qemuxml2argvtest.c:506)
==30993==
PASS: qemuxml2argvtest
Interesting side note is that running the test singularly via 'make -C tests
check TESTS=qemuxml2argvtest' didn't trip the valgrind error; however,
running during 'make -C tests valgrind' did cause the error to be seen.
f946462e14 changed behavior by settings
VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI upfront. If we do so before invoking
qemuDomainPCIAddressEnsureAddr we merely try to set the PCI slot via
qemuDomainPCIAddressReserveSlot instead reserving a new address via
qemuDomainPCIAddressSetNextAddr which fails with
$ ~/run-tck-test domain/200-disk-hotplug.t
./scripts/domain/200-disk-hotplug.t .. # Creating a new transient domain
./scripts/domain/200-disk-hotplug.t .. 1/5 # Attaching the new disk /var/lib/jenkins/jobs/libvirt-tck-build/workspace/scratchdir/200-disk-hotplug/extra.img
# Failed test 'disk has been attached'
# at ./scripts/domain/200-disk-hotplug.t line 67.
# died: Sys::Virt::Error (libvirt error code: 1, message: internal error unable to reserve PCI address 0:0:0.0
# )
Since we switched from direct host migration scheme to the one,
where we connect to the destination and then just pass a FD to a
qemu, we have uncovered a qemu bug. Qemu expects migration FD to
block. However, we are passing a nonblocking one which results in
cryptic error messages like:
qemu: warning: error while loading state section id 2
load of migration failed
The bug is already known to Qemu folks, but we should workaround
already released Qemus. Patch has been originally proposed by Stefan
Hajnoczi <stefanha@gmail.com>
This reverts commit 5ac846e42e.
After further discussions with Alon Levy, I learned the following:
The use of '-vga qxl' vs. '-device qxl-vga' is completely orthogonal
to whether ram_size can be exposed. Downstream distros are interested
in backporting support for multi-head qxl, but this can be done in
one of two ways:
1. Support one head per PCI device. If you do this, then it makes
sense to have full control over the PCI address of each device. For
full control, you need '-device qxl-vga' instead of '-vga qxl'.
2. Support multiple heads through a single PCI device. If you do
this, then you need to allocate more RAM to that PCI device (enough
ram to cover the multiple screens). Here, the device is hard-coded
to 0:0:2.0, both in qemu and libvirt code.
Apparently, backporting ram_size changes to allow multiple heads in
a single device is much easier than backporting multiple device
support. Furthermore, the presence or absence of qxl-vga.surfaces
is no different than the presence or absence of qxl-vga.ram_size;
both properties can be applied regardless of whether you have one
PCI device (-vga qxl) or multiple (-device qxl-vga), so this property
is NOT a good witness of whether '-device qxl-vga' support has been
backported.
Downstream RHEL will NOT be using this patch; and worse, leaving this
patch in risks doing the wrong thing if compiling upstream libvirt
on RHEL, so the best course of action is to revert it. That means
that libvirt will go back to only using '-device qxl-vga' for qemu
>= 1.2, but this is just fine because we know of no distros that plan
on backporting multiple PCI address support to any older version of
qemu. Meanwhile, downstream can still use ram_size to pack multiple
heads through a single PCI device.
This does nothing more than adding the new device and capability.
The device is present since QEMU 1.2.0.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
A better way to do this would be to use a configuration file like
[iscsi "target-name"]
user = name
password = pwd
and pass it via -readconfig. This would remove the username and password
from the "ps" output. For now, however, keep this solution.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Only sheepdog actually required it in the code, and we can use 7000 as the
default---the same value that QEMU uses for the simple "sheepdog:VOLUME"
syntax. With this change, the schema can be fixed to allow no port.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
libiscsi provides a userspace iSCSI initiator.
The main advantage over the kernel initiator is that it is very
easy to provide different initiator names for VMs on the same host.
Thus libiscsi supports usage of persistent reservations in the VM,
which otherwise would only be possible with NPIV.
libiscsi uses "iscsi" as the scheme, not "iscsi+tcp". We can change
this in the tests (while remaining backwards-compatible manner, because
QEMU uses TCP as the default transport for both Gluster and NBD).
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The VIR_ERR_NO_SUPPORT error code is reserved for cases where an
API is not implemented in a driver. It definitely should not be
used when an API execution fails due to unsupported operation.
We should record the new disk src in the shared disk table for
updating disk (CD-ROM or Floppy) API. Fortunately, we only allow
to update the disk source now, otherwise we might also want to
set the unpriv_sgio setting.
Now that VCPU number are removed from qemu_monitor_text.c
(commit cc78d7ba), VCPU string checking also should be removed.
Report-by: John Ferlan <jferlan@redhat.com>
Signed-off-by: Li Zhang <zhlcindy@linux.vnet.ibm.com>
Intend to reduce the redundant code,use virNumaSetupMemoryPolicy
to replace virLXCControllerSetupNUMAPolicy and
qemuProcessInitNumaMemoryPolicy.
This patch also moves the numa related codes to the
file virnuma.c and virnuma.h
Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
qemuGetNumadAdvice will be used by LXC driver, rename
it to virNumaGetAutoPlacementAdvice and move it to virnuma.c
Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
The "dtb" option sets the filename for the device tree.
If without this option support, "-dtb file" will be converted into
<qemu:commandline> in domain XML file.
For example, '-dtb /media/ram/test.dtb' will be converted into
<qemu:commandline>
<qemu:arg value='-dtb'/>
<qemu:arg value='/media/ram/test.dtb'/>
</qemu:commandline>
This is not very friendly.
This patchset add special <dtb> tag like <kernel> and <initrd>
which is easier for user to write domain XML file.
<os>
<type arch='ppc' machine='ppce500v2'>hvm</type>
<kernel>/media/ram/uImage</kernel>
<initrd>/media/ram/ramdisk</initrd>
<dtb>/media/ram/test.dtb</dtb>
<cmdline>root=/dev/ram rw console=ttyS0,115200</cmdline>
</os>
Signed-off-by: Eric Blake <eblake@redhat.com>
Commit 82d5fe5437
qemu: check backing chains even when cgroup is omitted
added backing file checks just before the code that removes optional
disks if they are not present. However, the backing chain code fails in
case the disk file does not exist, which makes qemuProcessStart fail
regardless on configured startupPolicy.
Note that startupPolicy implementation is still wrong after this patch
since it only check the first file in a possible chain. It should rather
check the complete backing chain. But this is an existing limitation
that can be solved later. After all, startupPolicy is most useful for
CDROM images and they won't make use of backing files in most cases.
QEMU 1.3 and newer support an alternative URI-based syntax to specify
the location of an NBD server. Libvirt can keep on using the old
syntax in general, but only the URI syntax supports IPv6 addresses.
The URI syntax also supports relative paths to Unix sockets. These
should never be used but aren't explicitly blocked either by the parser,
so support it just in case.
The URI syntax is intentionally compatible with Gluster's, and the
code can be reused.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
This reuses the XML format that was introduced for Gluster.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
These are supported by nbd-server and by the NBD server that QEMU
embeds for live image access.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
Move the code to an external function, and structure it to prepare
the addition of new features in the next few patches.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
QEMU added -drive in 2007, and NBD in 2008. Both appeared first in
release 0.10.0. Thus the code to support network disks without -drive
is dead, and in fact it incorrectly escapes commas. Drop it.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
When getting CPUs' information, it assumes that CPU indexes
are not contiguous. But for ppc64 platform, CPU indexes are not
contiguous because SMT is needed to be disabled, so CPU information
is not right on ppc64 and vpuinfo, vcpupin can't work corretly.
This patch is to remove the assumption to be compatible with ppc64.
Test:
4 vcpus are assigned to one VM and execute vcpuinfo command.
Without patch: There is only one vcpu informaion can be listed.
With patch: All vcpus' information can be listed correctly.
Signed-off-by: Li Zhang <zhlcindy@linux.vnet.ibm.com>
Newer versions of QEMU support virtio-scsi and virtio-rng devices
on the virtio-s390 and ccw buses. Adding capability detection,
address assignment and command line generation for that.
Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
QEMU_CAPS_VIRTIO_SCSI_PCI implies that virtio-scsi is only supported
for the PCI bus, which is not the case. Remove the _PCI suffix.
Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
Multi-head QXL support is so useful that distros have started to
backport it to qemu earlier than 1.2. After discussion with
Alon Levy, we determined that the existence of the qxl-vga.surfaces
property is a reliable indicator of whether '-device qxl-vga' works,
or whether we have to stick to the older '-vga qxl'. I'm leaving
in the existing check for QEMU_CAPS_DEVICE_VIDEO_PRIMARY tied to
qemu 1.2 and newer (in case qemu is built without qxl support),
but for those distros that backport qxl, this additional capability
check will allow the correct command line for both RHEL 6.3 (which
lacks the feature) and RHEL 6.4 (where qemu still claims to be
version 0.12.2.x, but has backported multi-head qxl).
* src/qemu/qemu_capabilities.c (virQEMUCapsObjectPropsQxlVga): New
property test.
(virQEMUCapsExtractDeviceStr): Probe for backport of new
capability to qemu earlier than 1.2.
* tests/qemuhelpdata/qemu-kvm-1.2.0-device: Update test.
* tests/qemuhelpdata/qemu-1.2.0-device: Likewise.
* tests/qemuhelpdata/qemu-kvm-0.12.1.2-rhel62-beta-device:
Likewise.
Qemu's implementation of virtio RNG supports rate limiting of the
entropy used. This patch exposes the option to tune this functionality.
This patch is based on qemu commit 904d6f588063fb5ad2b61998acdf1e73fb4
The rate limiting is exported in the XML as:
<devices>
...
<rng model='virtio'>
<rate bytes='123' period='1234'/>
<backend model='random'/>
</rng>
...
We didn't yet expose the virtio device attach and detach functionality
for s390 domains as the device hotplug was very limited with the old
virtio-s390 bus. With the CCW bus there's full hotplug support for
virtio devices in QEMU, so we are adding this to libvirt too.
Since the virtio hotplug isn't limited to PCI anymore, we change the
function names from xxxPCIyyy to xxxVirtioyyy, where we handle all
three virtio bus types.
Signed-off-by: J.B. Joret <jb@linux.vnet.ibm.com>
Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
This commit adds the QEMU driver support for CCW addresses. The
current QEMU only allows virtio devices to be attached to the
CCW bus. We named the new capability indicating that support
QEMU_CAPS_VIRTIO_CCW accordingly.
The fact that CCW devices can only be assigned to domains with a
machine type of s390-ccw-virtio requires a few extra checks for
machine type in qemu_command.c on top of querying
QEMU_CAPS_VIRTIO_{CCW|S390}.
The majority of the new functions deals with CCW address generation
and management.
Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
With our recent patch (1715c83b5f) we thrive to get the correct
number of maximal VCPUs. However, we are using a constant from
linux/kvm.h which may be not defined in every distro. Hence, we
should guard usage of the constant with ifdef preprocessor
directive. This was introduced in kernel:
commit 8c3ba334f8588e1d5099f8602cf01897720e0eca
Author: Sasha Levin <levinsasha928@gmail.com>
Date: Mon Jul 18 17:17:15 2011 +0300
KVM: x86: Raise the hard VCPU count limit
The patch raises the hard limit of VCPU count to 254.
This will allow developers to easily work on scalability
and will allow users to test high VCPU setups easily without
patching the kernel.
To prevent possible issues with current setups, KVM_CAP_NR_VCPUS
now returns the recommended VCPU limit (which is still 64) - this
should be a safe value for everybody, while a new KVM_CAP_MAX_VCPUS
returns the hard limit which is now 254.
$ git desc 8c3ba334f
v3.1-rc7-48-g8c3ba33
The virCaps structure gathered a ton of irrelevant data over time that.
The original reason is that it was propagated to the XML parser
functions.
This patch aims to create a new data structure virDomainXMLConf that
will contain immutable data that are used by the XML parser. This will
allow two things we need:
1) Get rid of the stuff from virCaps
2) Allow us to add callbacks to check and add driver specific stuff
after domain XML is parsed.
This first attempt removes pointers to private data allocation functions
to this new structure and update all callers and function that require
them.
At least one caller may call qemuSharedDiskEntryFree with NULL as the
first argument. Let's make the function similar to other *Free functions
and do nothing in such case.
When there are two concurrent threads, we may dereference a NULL
pointer, even though it has been checked before:
1. Thread1: starts executing qemuDomainBlockStatsFlags() with nparams != 0.
It finds given disk and successfully pass check for disk->info.alias
not being NULL.
2. Thread2: starts executing qemuDomainDetachDeviceFlags() on the very same
disk as Thread1 is working on.
3. Thread1: gets to qemuDomainObjBeginJob() where it sets a job on a
domain.
4. Thread2: also tries to set a job. However, we are not guaranteed which
thread wins. So assume it's Thread2 who can continue.
5. Thread2: does the actual detach and frees disk->info.alias
6. Thread2: quits the job
7. Thread1: now successfully acquires the job, and accesses a NULL pointer.
The current QEMU code for skipping log messages only skips over
'debug' message, switch to virLogProbablyLogMessage to make sure
it skips over all of them
19c6ad9a (qemu: Refactor qemuDomainSetMemoryParameters) introduced
a new macro, VIR_GET_LIMIT_PARAMETER(PARAM, VALUE). But if statement
in the macro is not correct and so set_XXXX flags are set to false
in the wrong. As a result, libvirt ignores all memtune parameters.
This patch fixes the conditional expression to work correctly.
Signed-off-by: Satoru Moriya <satoru.moriya@hds.com>
Commit f506a4c1 changed virSetUIDGID() to be a noop
when uid/gid are -1, while it used to be a noop when
they are <= 0.
The changes in this commit broke creating new VMs in GNOME Boxes
as qemuDomainCheckDiskPresence gets called during domain creation/startup,
which in turn calls virFileAccessibleAs which fails after calling
virSetUIDGID(0, 0) (Boxes uses session libvirtd). virSetUIDGID is called with
(0, 0) as these are the default user/group values in virQEMUDriverConfig
for session libvirtd.
This commit changes virQEMUDriverConfigNew to use -1 as the unpriviledged
uid/gid. I've also looked at the various places where cfg->user is used,
and they all seem to handle -1 correctly.
This reverts the hack done in
commit 568a6cda27
Author: Jiri Denemark <jdenemar@redhat.com>
Date: Fri Feb 15 15:11:47 2013 +0100
qemu: Avoid deadlock in autodestroy
since we now have a fix which avoids the deadlock scenario
entirely
There is a lock ordering problem in the QEMU close callback
APIs.
When starting a guest we have a lock on the VM. We then
set a autodestroy callback, which acquires a lock on the
close callbacks.
When running auto-destroy, we obtain a lock on the close
callbacks, then run each callbacks - which obtains a lock
on the VM.
This causes deadlock if anyone tries to start a VM, while
autodestroy is taking place.
The fix is to do autodestroy in 2 phases. First obtain
all the callbacks and remove them from the list under
the close callback lock. Then invoke each callback
from outside the close callback lock.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
When the auto-destroy callback runs it is supposed to return
NULL if the virDomainObjPtr is no longer valid. It was not
doing this for transient guests, so we tried to virObjectUnlock
a mutex which had been freed. This often led to a crash.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
qemuProcessStart expects to be run with a job already set and every
caller except for qemuMigrationPrepareAny use it correctly. This bug can
be observed in libvirtd logs during incoming migration as
warning : qemuDomainObjEnterMonitorInternal:979 : This thread seems
to be the async job owner; entering monitor without asking for a
nested job is dangerous
As pointed out in
https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1034661
The sentence
"The function of PCI device addresses must less than 8"
does not quite make sense. Update that to read
"The function of PCI device addresses must be less than 8"
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Currently, qemuDomainShutdownFlags() chooses the agent method of
shutdown whenever the agent is configured. However, this
assumption is not enough as the guest agent may be unresponsive
at the moment. So unless guest agent method has been explicitly
requested, we should fall back to the ACPI method.
The unitialized local variable qemuVersion can cause an random value
to be returned for the hypervisor version, observable with virsh version.
Introduced by commit b46f7f4a0b
Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
disk->src is still used for disks->hosts->name, do not free it.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
The QEMU driver has a list of devices nodes that are whitelisted
for all guests. The kernel has recently started returning an
error if you try to whitelist a device which does not exist.
This causes a warning in libvirt logs and an audit error for
any missing devices. eg
2013-02-27 16:08:26.515+0000: 29625: warning : virDomainAuditCgroup:451 : success=no virt=kvm resrc=cgroup reason=allow vm="vm031714" uuid=9d8f1de0-44f4-a0b1-7d50-e41ee6cd897b cgroup="/sys/fs/cgroup/devices/libvirt/qemu/vm031714/" class=path path=/dev/kqemu rdev=? acl=rw
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The code for putting the emulator threads in a separate cgroup
would spam the logs with warnings
2013-02-27 16:08:26.731+0000: 29624: warning : virCgroupMoveTask:887 : no vm cgroup in controller 3
2013-02-27 16:08:26.731+0000: 29624: warning : virCgroupMoveTask:887 : no vm cgroup in controller 4
2013-02-27 16:08:26.732+0000: 29624: warning : virCgroupMoveTask:887 : no vm cgroup in controller 6
This is because it has only created child cgroups for 3 of the
controllers, but was trying to move the processes from all the
controllers. The fix is to only try to move threads in the
controllers we actually created. Also remove the warning and
make it return a hard error to avoid such lazy callers in the
future.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The virQEMUCloseCallbacksRunOne method was passing a uuid string
to virDomainObjListFindByUUID, when it actually expected to get
a raw uuid buffer. This was not caught by the compiler because
the method was using a 'void *uuid' instead of first casting
it to the expected type.
This regression was accidentally caused by refactoring in
commit 568a6cda27
Author: Jiri Denemark <jdenemar@redhat.com>
Date: Fri Feb 15 15:11:47 2013 +0100
qemu: Avoid deadlock in autodestroy
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=896092 mentions that
qemu 1.4 and earlier only accept a simple start-stop range for
the cpu=... argument of -numa. Libvirt would attempt to use
-numa cpu=1,3 for a disjoint range, which did not work as intended.
Upstream qemu will be adding a new syntax for disjoint cpu ranges
in 1.5; but the design for that syntax is still under discussion
at the time of this patch. So for libvirt 1.0.3, it is safest to
just reject attempts to build an invalid qemu command line; in the
future, we can add a capability bit and translate to the final
accepted design for selecting a disjoint cpu range in numa.
* src/qemu/qemu_command.c (qemuBuildNumaArgStr): Reject disjoint
ranges.
This change tried to fix a crash with changing CDROM media but
failed to actually do so
commit d0172d2b1b
Author: Osier Yang <jyang@redhat.com>
Date: Tue Feb 19 20:27:45 2013 +0800
qemu: Remove the shared disk entry if the operation is ejecting or updating
It was still accessing disk->src, when the entire 'disk' object
has been free'd already. Even if it weren't free'd, accessing
the 'src' value of virDomainDiskDef is not allowed without
first validating disk->type is file or block. Just remove the
broken code entirely.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Currently we call virSetDeviceUnprivSGIO with val == 0 if a block device
has an sgio attribute. But for sgio='filtered', we know that a
kernel with no unpriv_sgio support will always behave as the user
wanted. In this case, there is no need to call the function and
report a (bogus) error.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
If virCondInit fails (okay, so that's unlikely), then we end up
attempting a virObjectUnlock() on the cleanup path, even though
we don't hold a lock. This is not guaranteed to be safe. While
at it, I noticed a couple places where we were referencing mon->fd
outside locks.
* src/qemu/qemu_monitor.c (qemuMonitorOpenInternal): Minimize lock
duration. mon->watch doesn't need clean up on error.
(qemuMonitorGetBlockExtent, qemuMonitorBlockResize): Don't
dereference fd outside of lock.
I built without yajl support, and noticed a strange failure message
in qemumonitorjsontest:
2013-02-22 16:12:37.503+0000: 19812: error : virJSONValueToString:1119 : internal error No JSON parser implementation is available
2013-02-22 16:12:37.503+0000: 19812: error : qemuMonitorJSONCommandWithFd:253 : out of memory
While a later patch will fix the test to skip when json is not present,
this patch avoids overriding the more useful error message from
virJSONValueToString returning NULL.
* src/qemu/qemu_monitor_json.c (qemuMonitorJSONCommandWithFd):
Don't override message.
(qemuMonitorJSONCheckError): Don't print NULL.
* src/qemu/qemu_agent.c (qemuAgentCommand): Don't override message.
(qemuAgentCheckError): Don't print NULL.
(qemuAgentArbitraryCommand): Properly fail on OOM.
The new TypedParam helper APIs allow to simplify this function
significantly.
This patch integrates the fix in 75e5bec97b
by correctly ordering the setting functions instead of reordering the
parameters.
This patch adds a new capability bit QEMU_CAPS_OBJECT_RNG_EGD and code
to support the egd backend for the VirtIO RNG device.
The device is added by 3 qemu command line options:
-chardev socket,id=charrng0,host=1.2.3.4,port=1234 (communication
backend)
-object rng-egd,chardev=charrng0,id=rng0 (RNG protocol client)
-device virtio-rng-pci,rng=rng0,bus=pci.0,addr=0x4 (the RNG device)
This patch implements support for the virtio-rng-pci device and the
rng-random backend in qemu.
Two capabilities bits are added to track support for those:
QEMU_CAPS_DEVICE_VIRTIO_RNG - for the device support and
QEMU_CAPS_OBJECT_RNG_RANDOM - for the backend support.
qemu is invoked with these additional parameters if the device is
enabled:
-object rng-random,id=rng0,filename=/test/phile (to add the backend)
-device virtio-rng-pci,rng=rng0,bus=pci.0,addr=0x4 (to add the device)
This function does the source part of NBD magic. It
invokes drive-mirror on each non shared and RW disk with
a source and wait till the mirroring process completes.
When it does we can proceed with migration.
Currently, an active waiting is done: every 500ms libvirt
asks qemu if block-job is finished or not. However, once
the job finishes, qemu doesn't report its progress so we
can only assume if the job finished successfully or not.
The better solution would be to listen to the event which
is sent as soon as the job finishes. The event does
contain the result of job.
