If you use public api virConnectListAllDomains() with second parameter
set to NULL to get only the number of domains you will lock out all
other operations with domains.
Introduced by commit 2c680804.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
(cherry picked from commit fc22b2e74890873848b43fffae43025d22053669)
virDomainDefCompatibleDevice blocks use of USB if no USB
controller is present. This is not correct for containers
since devices can be assigned directly regardless of any
controllers.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
(cherry picked from commit 7a44af963ef75c487f874bc91613ad45e5b167e9)
The NWFilter code has as a deadlock race condition between
the virNWFilter{Define,Undefine} APIs and starting of guest
VMs due to mis-matched lock ordering.
In the virNWFilter{Define,Undefine} codepaths the lock ordering
is
1. nwfilter driver lock
2. virt driver lock
3. nwfilter update lock
4. domain object lock
In the VM guest startup paths the lock ordering is
1. virt driver lock
2. domain object lock
3. nwfilter update lock
As can be seen the domain object and nwfilter update locks are
not acquired in a consistent order.
The fix used is to push the nwfilter update lock upto the top
level resulting in a lock ordering for virNWFilter{Define,Undefine}
of
1. nwfilter driver lock
2. nwfilter update lock
3. virt driver lock
4. domain object lock
and VM start using
1. nwfilter update lock
2. virt driver lock
3. domain object lock
This has the effect of serializing VM startup once again, even if
no nwfilters are applied to the guest. There is also the possibility
of deadlock due to a call graph loop via virNWFilterInstantiate
and virNWFilterInstantiateFilterLate.
These two problems mean the lock must be turned into a read/write
lock instead of a plain mutex at the same time. The lock is used to
serialize changes to the "driver->nwfilters" hash, so the write lock
only needs to be held by the define/undefine methods. All other
methods can rely on a read lock which allows good concurrency.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
(cherry picked from commit 6e5c79a1b5a8b3a23e7df7ffe58fb272aa17fbfb)
Conflicts:
src/conf/nwfilter_conf.c
- virReportOOMError() in context of one hunk.
src/lxc/lxc_driver.c
- functions renamed, and lxc object locking changed, creating
a conflict in the context.
The virConnectPtr is passed around loads of nwfilter code in
order to provide it as a parameter to the callback registered
by the virt drivers. None of the virt drivers use this param
though, so it serves no purpose.
Avoiding the need to pass a virConnectPtr means that the
nwfilterStateReload method no longer needs to open a bogus
QEMU driver connection. This addresses a race condition that
can lead to a crash on startup.
The nwfilter driver starts before the QEMU driver and registers
some callbacks with DBus to detect firewalld reload. If the
firewalld reload happens while the QEMU driver is still starting
up though, the nwfilterStateReload method will open a connection
to the partially initialized QEMU driver and cause a crash.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
(cherry picked from commit 999d72fbd59ea712128ae294b69b6a54039d757b)
The nwfilter driver only needs a reference to its private
state object, not a full virConnectPtr. Update the domUpdateCBStruct
struct to have a 'void *opaque' field instead of a virConnectPtr.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
(cherry picked from commit ebca369e3fe5ac999c261c2d44e60a1bac3cfe65)
None of the virNWFilterDefParse* methods require a virConnectPtr
arg, so just drop it
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
(cherry picked from commit b77b16ce4166dcc87963ae5d279b77b162ddbb55)
For inexplicable reasons, the nwfilter XML parser is intentionally
ignoring errors that arise during parsing. As well as meaning that
users don't get any feedback on their XML mistakes, this will lead
it to silently drop data in OOM conditions.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
(cherry picked from commit 4f2094346d98f4ed6a2de115d204c166cc563496)
While running objecteventtest, it was found that valgrind pointed out the
following memory leak:
==13464== 5 bytes in 1 blocks are definitely lost in loss record 7 of 134
==13464== at 0x4A0887C: malloc (vg_replace_malloc.c:270)
==13464== by 0x341F485E21: strdup (strdup.c:42)
==13464== by 0x4CAE28F: virStrdup (virstring.c:554)
==13464== by 0x4CF3CBE: virObjectEventCallbackListAddID (object_event.c:286)
==13464== by 0x4CF49CA: virObjectEventStateRegisterID (object_event.c:729)
==13464== by 0x4CF73FE: virDomainEventStateRegisterID (domain_event.c:1424)
==13464== by 0x4D7358F: testConnectDomainEventRegisterAny (test_driver.c:6032)
==13464== by 0x4D600C8: virConnectDomainEventRegisterAny (libvirt.c:19128)
==13464== by 0x402409: testDomainStartStopEvent (objecteventtest.c:232)
==13464== by 0x403451: virtTestRun (testutils.c:138)
==13464== by 0x402012: mymain (objecteventtest.c:395)
==13464== by 0x403AF2: virtTestMain (testutils.c:593)
==13464==
(cherry picked from commit 34d52b3471a18c72b7a02e27d65857505d858a8e)
Conflicts:
src/conf/object_event.c - 1.2.1 refactoring to object_event not
backported, so change applied directly in older domain_event.c instead
The @list->callbacks is an array that is inflated whenever a new event
is added, e.g. via virDomainEventCallbackListAddID(). However, when we
are freeing the array, we free the items within it but forgot to
actually free it.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
(cherry picked from commit ea13a759f5b32204e1a7bdf6ee228235acb42bcb)
Since 76b644c when the support for RAM filesystems was introduced,
libvirt accepted the following XML:
<source usage='1024' unit='KiB'/>
This was parsed correctly and internally stored in bytes, but it
was formatted as (with an extra 's'):
<source usage='1024' units='KiB'/>
When read again, this was treated as if the units were missing,
meaning libvirt was unable to parse its own XML correctly.
The usage attribute was documented as being in KiB, but it was not
scaled if the unit was missing. Transient domains still worked,
because this was balanced by an extra 'k' in the mount options.
This patch:
Changes the parser to use 'units' instead of 'unit', as the latter
was never documented (fixing persistent domains) and some programs
(libvirt-glib, libvirt-sandbox) already parse the 'units' attribute.
Removes the extra 'k' from the tmpfs mount options, which is needed
because now we parse our own XML correctly.
Changes the default input unit to KiB to match documentation, fixing:
https://bugzilla.redhat.com/show_bug.cgi?id=1015689
(cherry picked from commit 3f029fb5319b9dc9cc2fbf8d1ba4505ee9e4b1e3)
Conflicts:
src/conf/domain_conf.c
src/lxc/lxc_container.c
After freeing the bitmap pointer, it must set the pointer to NULL.
This will avoid any other use of the freed memory of the bitmap pointer.
https://bugzilla.redhat.com/show_bug.cgi?id=1006710
Signed-off-by: Liuji (Jeremy) <jeremy.liu@huawei.com>
(cherry picked from commit ef5d51d491356f1f4287aa3a8b908b183b6dd9aa)
Decrementing it when it was already 0 causes an invalid free
in virNetworkDefUpdateDNSHost if virNetworkDNSHostDefParseXML
fails and virNetworkDNSHostDefClear gets called twice.
virNetworkForwardDefClear left the number untouched even if it
freed all the elements.
(cherry picked from commit c4e23388e6c7f769e45d1c162f880cd81e4d4d3b)
There were two errors, one as a direct result of commit id '8807b285'
and the other from cut-n-paste
TEST: nodedevxml2xmltest
.............. 14 OK
==25735== 3 bytes in 1 blocks are definitely lost in loss record 1 of 24
==25735== at 0x4A0887C: malloc (vg_replace_malloc.c:270)
==25735== by 0x344D2AF275: xmlStrndup (in /usr/lib64/libxml2.so.2.9.1)
==25735== by 0x4D0C767: virNodeDeviceDefParseNode (node_device_conf.c:997)
==25735== by 0x4D0D3D2: virNodeDeviceDefParse (node_device_conf.c:1337)
==25735== by 0x401CA4: testCompareXMLToXMLHelper (nodedevxml2xmltest.c:28)
==25735== by 0x402B2F: virtTestRun (testutils.c:158)
==25735== by 0x401B27: mymain (nodedevxml2xmltest.c:81)
==25735== by 0x40316A: virtTestMain (testutils.c:722)
==25735== by 0x37C1021A04: (below main) (libc-start.c:225)
==25735==
==25735== 16 bytes in 1 blocks are definitely lost in loss record 10 of 24
==25735== at 0x4A08A6E: realloc (vg_replace_malloc.c:662)
==25735== by 0x4C7385E: virReallocN (viralloc.c:184)
==25735== by 0x4C73906: virExpandN (viralloc.c:214)
==25735== by 0x4C73B4A: virInsertElementsN (viralloc.c:324)
==25735== by 0x4D0C84C: virNodeDeviceDefParseNode (node_device_conf.c:1026)
==25735== by 0x4D0D3D2: virNodeDeviceDefParse (node_device_conf.c:1337)
==25735== by 0x401CA4: testCompareXMLToXMLHelper (nodedevxml2xmltest.c:28)
==25735== by 0x402B2F: virtTestRun (testutils.c:158)
==25735== by 0x401B27: mymain (nodedevxml2xmltest.c:81)
==25735== by 0x40316A: virtTestMain (testutils.c:722)
==25735== by 0x37C1021A04: (below main) (libc-start.c:225)
==25735==
PASS: nodedevxml2xmltest
The first error was resolved by adding a missing VIR_FREE(numberStr); in
the new function virNodeDevCapPciDevIommuGroupParseXML().
The second error was a bit more opaque as the error was a result of copying
the free methodolgy of the existing code in virNodeDevCapsDefFree(). The code
would free each of the entries in the array, but not the memory for the
array itself. Added the necessary VIR_FREE(data->pci_dev.iommuGroupDevices)
and while at it added the missing VIR_FREE(data->pci_dev.virtual_functions)
although there wasn't a test that tripped across it (thus it's been lurking
since commit id 'a010165d').
Commit '861d4056' introduced the following:
TEST: networkxml2xmltest
.................. 18 OK
==25504== 7 bytes in 1 blocks are definitely lost in loss record 5 of 23
==25504== at 0x4A0887C: malloc (vg_replace_malloc.c:270)
==25504== by 0x37C1085D71: strdup (strdup.c:42)
==25504== by 0x4CB835F: virStrdup (virstring.c:546)
==25504== by 0x4CC5179: virXPathString (virxml.c:90)
==25504== by 0x4CC75C2: virNetDevVlanParse (netdev_vlan_conf.c:78)
==25504== by 0x4CF928A: virNetworkPortGroupParseXML (network_conf.c:1555)
==25504== by 0x4CFE385: virNetworkDefParseXML (network_conf.c:2049)
==25504== by 0x4D0113B: virNetworkDefParseNode (network_conf.c:2273)
==25504== by 0x4D01254: virNetworkDefParse (network_conf.c:2234)
==25504== by 0x401E80: testCompareXMLToXMLHelper (networkxml2xmltest.c:32)
==25504== by 0x402D4F: virtTestRun (testutils.c:158)
==25504== by 0x401CE9: mymain (networkxml2xmltest.c:110)
==25504==
PASS: networkxml2xmltest
Also changed the label from error to cleanup and adjusted code since it's
all one exit path
Implicit controllers may be dependent on device definitions altered
in a post-parse callback. Specifically, if a console device is
defined without the target type, the type will be set in QEMU's
callback. In the case of s390, this is virtio, which requires
an implicit virtio-serial controller.
Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
This includes adding it to the nodedev parser and formatter, docs, and
test.
An example of the new iommuGroup element that is a part of the output
from "virsh nodedev-dumpxml" (virNodeDeviceGetXMLDesc()):
<device>
<name>pci_0000_02_00_1</name>
<capability type='pci'>
...
<iommuGroup number='12'>
<address domain='0x0000' bus='0x02' slot='0x00' function='0x0'/>
<address domain='0x0000' bus='0x02' slot='0x00' function='0x1'/>
</iommuGroup>
</capability>
</device>
This patch adds functionality to allow libvirt to configure the
'native-tagged' and 'native-untagged' modes on openvswitch networks.
Signed-off-by: Laine Stump <laine@redhat.com>
Add <features> and <compat> elements to volume target XML.
<compat> is a string which for qcow2 represents the QEMU version
it should be compatible with. Valid values are 0.10 and 1.1.
1.1 is implicit if the <features> element is present, otherwise
qemu-img default is used. 0.10 can be specified to explicitly
create older images after the qemu-img default changes.
<features> contains optional features, so far
<lazy_refcounts/> is available, which enables caching of reference
counters, improving performance for snapshots.
Add new CPU features for HyperV:
vapic for virtual APIC support
spinlocks for setting spinlock support
<features>
<hyperv>
<vapic state='on'/>
<spinlocks state='on' retries='4096'/>
</hyperv>
</features>
https://bugzilla.redhat.com/show_bug.cgi?id=784836
Just to reduce the indentation levels. Remove the unneeded
NULL check for disk->file, as virBufferEscapeString doesn't
print anything with NULL arguments.
Since scsi generic device doesn't have DEVTYPE property set, the
only way to know if it's a scsi generic device or not is to read
the "SUBSYSTEM" property.
The XML of the scsi generic device will be like:
<device>
<name>scsi_generic_sg0</name>
<path>/sys/devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:0/0:0:0:0/scsi_generic/sg0</path>
<parent>scsi_0_0_0_0</parent>
<capability type='scsi_generic'>
<char>/dev/sg0</char>
</capability>
</device>
The name format is constructed by libvirt, it's not that clear to
get what the device's sysfs path should be. This exposes the device's
sysfs path by a new tag <path>.
Since the sysfspath is filled during enumerating the devices by
either udev or HAL. It's an output-only tag.
https://bugzilla.redhat.com/show_bug.cgi?id=971485
As of d7f9d827531bc843b7c5aa9d3e8c08738a1de248 we copy the listen
address from the qemu.conf config file in case none has been provided
via XML. But later, when migrating, we should not include such listen
address in the migratable XML as it is something autogenerated, not
requested by user. Moreover, the binding to the listen address will
likely fail, unless the address is '0.0.0.0' or its IPv6 equivalent.
This patch introduces a new boolean attribute to virDomainGraphicsListenDef
to distinguish autofilled listen addresses. However, we must keep the
attribute over libvirtd restarts, so it must be kept within status XML.
https://bugzilla.redhat.com/show_bug.cgi?id=964177
Though both libvirt and QEMU's document say RTC_CHANGE returns
the offset from the host UTC, qemu actually returns the offset
from the specified date instead when specific date is provided
(-rtc base=$date).
It's not safe for qemu to fix it in code, it worked like that
for 3 years, changing it now may break other QEMU use cases.
What qemu tries to do is to fix the document:
http://lists.gnu.org/archive/html/qemu-devel/2013-05/msg04782.html
And in libvirt side, instead of replying on the value from qemu,
this converts the offset returned from qemu to the offset from
host UTC, by:
/*
* a: the offset from qemu RTC_CHANGE event
* b: The specified date (-rtc base=$date)
* c: the host date when libvirt gets the RTC_CHANGE event
* offset: What libvirt will report
*/
offset = a + (b - c);
The specified date (-rtc base=$date) is recorded in clock's def as
an internal only member (may be useful to exposed outside?).
Internal only XML tag "basetime" is introduced to not lose the
guest's basetime after libvirt restarting/reloading:
<clock offset='variable' adjustment='304' basis='utc' basetime='1370423588'/>
With unknown good reasons, the attribute "bus" of scsi device
address is always set to 0, same for attribute "target". (See
virDomainDiskDefAssignAddress).
Though we might need to change the algorithm to honor "bus"
and "target" too, that's a different issue. The address generator
for scsi host device in this patch just follows the unknown
good reasons, only considering the "controller" and "unit".
It walks through all scsi controllers and their units, to see
if the address $controller:0:0:$unit can be used (if not used
by any disk or scsi host device yet), if found one, it sits on
it, otherwise, it creates a new controller (actually the controller
is implicitly created by someone else), and sits on
$new_controller:0:0:0 instead.
Commit '6afdfc8e' adjusted the exit and error paths to go through the error
and cleanup labels, but neglected to remove the return ret prior to cleanup.
Also noted the 'type' xml string fetch was never checked for NULL which
could lead to some interesting results.
And error out if the casted value is not same with the original
one, which prevents the bug on platform(s) where uid_t/gid_t
has different size with long.
Changes:
* Free all the strings at "cleanup", instead of freeing them
in the middle
* Remove xmlFree
* s/tmppath/target_path/, to make it more sensible
* Add new goto label "error"
gcc 4.1.2 (hello, RHEL 5!) fails to build on 32-bit platforms with:
conf/domain_conf.c: In function 'virDomainDefParseXML':
conf/domain_conf.c:10581: warning: integer constant is too large for 'long' type
Problem introduced in commit f8e3221f9.
* src/conf/domain_conf.c (virDomainDefParseXML): Mark large constants.
Signed-off-by: Eric Blake <eblake@redhat.com>
I noticed several unusual spacings in for loops, and decided to
fix them up. See the next commit for the syntax check that found
all of these.
* examples/domsuspend/suspend.c (main): Fix spacing.
* python/libvirt-override.c: Likewise.
* src/conf/interface_conf.c: Likewise.
* src/security/virt-aa-helper.c: Likewise.
* src/util/virconf.c: Likewise.
* src/util/virhook.c: Likewise.
* src/util/virlog.c: Likewise.
* src/util/virsocketaddr.c: Likewise.
* src/util/virsysinfo.c: Likewise.
* src/util/viruuid.c: Likewise.
* src/vbox/vbox_tmpl.c: Likewise.
* src/xen/xen_hypervisor.c: Likewise.
* tools/virsh-domain-monitor.c (vshDomainStateToString): Drop
default case, to let compiler check us.
* tools/virsh-domain.c (vshDomainVcpuStateToString): Likewise.
Signed-off-by: Eric Blake <eblake@redhat.com>
With previous patch, we accept negative value as length of string to
duplicate. So there is no need to pass strlen(src) in case we want to do
duplicate the whole string.
Don't free the stream on error if we've successfully added it
to the hash table, since it will be freed by virChrdevHashEntryFree
callback.
Preserve the error message before calling virStreamFree, since it
resets the error.
Introduced by 4716138, crashing since 6921892.
Reported by Sergey Fionov on libvir-list.
