Commit Graph

423 Commits

Author SHA1 Message Date
Ján Tomko
1cd8f500ee Fix segfault when starting a domain with no cpu definition
My commit fba6bc4 iterated over the features in cpu definition
without checking if there is one.
2014-07-02 10:37:05 +02:00
Ján Tomko
fba6bc47cb Add invariant TSC cpu flag
Add suport for invariant TSC flag (CPUID 0x80000007, bit 8 of EDX).
If this flag is enabled, the TSC ticks at a constant rate across
all ACPI P-, C- and T-states.

This can be enabled by adding:
<feature name='invtsc'/>
to the <cpu> element.

Migration and saving the domain does not work with this flag.

QEMU support: http://git.qemu.org/?p=qemu.git;a=commitdiff;h=303752a

The feature name "invtsc" differs from the name "" used by the linux kernel:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/arch/x86/kernel/cpu/powerflags.c?id=30321c7b#n18
2014-07-02 09:22:13 +02:00
Julio Faracco
aa990efe97 qemu: enum cleanups in "src/qemu/*"
As we are doing with the enum structures, a cleanup in "src/qemu/"
directory was done now. All the enums that were defined in the
header files were converted to typedefs in this directory. This
patch includes all the adjustments to remove conflicts when you do
this kind of change. "Enum-to-typedef"'s conversions were made in
"src/qemu/qemu_{capabilities, domain, migration, hotplug}.h".

Signed-off-by: Julio Faracco <jcfaracco@gmail.com>
2014-06-24 12:56:54 -06:00
Giuseppe Scrivano
1a065caa79 graphics: remember graphics not auto allocated ports
When looking for a port to allocate, the port allocator didn't take in
consideration ports that are statically set by the user.  Defining
these two graphics elements in the XML would cause an error, as the
port allocator would try to use the same port for the spice graphics
element:

    <graphics type='spice' autoport='yes'/>
    <graphics type='vnc' port='5900' autoport='no'/>

The new *[pP]ortReserved variables keep track of the ports that were
successfully tracked as used by the port allocator but that weren't
bound.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1081881

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
2014-06-24 14:17:59 +02:00
Ján Tomko
b2626755d3 Split out CCW address allocation
Just code movement and rename.
2014-06-21 10:12:21 +02:00
Peter Krempa
7c6dae0418 security: Sanitize type of @migrated in virSecurityManagerRestoreAllLabel
Also remove one spurious ATTRIBUTE_UNUSED guarding the @migrated
argument.
2014-06-20 09:27:19 +02:00
Eric Blake
1bfe73a126 blockjob: use stable disk string in job event
When the block job event was first added, it was for block pull,
where the active layer of the disk remains the same name.  It was
also in a day where we only cared about local files, and so we
always had a canonical absolute file name.  But two things have
changed since then: we now have network disks, where determining
a single absolute string does not really make sense; and we have
two-phase jobs (copy and active commit) where the name of the
active layer changes between the first event (ready, on the old
name) and second (complete, on the pivoted name).

Adam Litke reported that having an unstable string between events
makes life harder for clients.  Furthermore, all of our API that
operate on a particular disk of a domain accept multiple strings:
not only the absolute name of the active layer, but also the
destination device name (such as 'vda').  As this latter name is
stable, even for network sources, it serves as a better string
to supply in block job events.

But backwards-compatibility demands that we should not change the
name handed to users unless they explicitly request it.  Therefore,
this patch adds a new event, BLOCK_JOB_2 (alas, I couldn't think of
any nicer name - but at least Migrate2 and Migrate3 are precedent
for a number suffix).  We must double up on emitting both old-style
and new-style events according to what clients have registered for
(see also how IOError and IOErrorReason emits double events, but
there the difference was a larger struct rather than changed
meaning of one of the struct members).

Unfortunately, adding a new event isn't something that can easily
be broken into pieces, so the commit is rather large.

* include/libvirt/libvirt.h.in (virDomainEventID): Add a new id
for VIR_DOMAIN_EVENT_ID_BLOCK_JOB_2.
(virConnectDomainEventBlockJobCallback): Document new semantics.
* src/conf/domain_event.c (_virDomainEventBlockJob): Rename field,
to ensure we catch all clients.
(virDomainEventBlockJobNew): Add parameter.
(virDomainEventBlockJobDispose)
(virDomainEventBlockJobNewFromObj)
(virDomainEventBlockJobNewFromDom)
(virDomainEventDispatchDefaultFunc): Adjust clients.
(virDomainEventBlockJob2NewFromObj)
(virDomainEventBlockJob2NewFromDom): New functions.
* src/conf/domain_event.h: Add new prototypes.
* src/libvirt_private.syms (domain_event.h): Export new functions.
* src/qemu/qemu_driver.c (qemuDomainBlockJobImpl): Generate two
different events.
* src/qemu/qemu_process.c (qemuProcessHandleBlockJob): Likewise.
* src/remote/remote_protocol.x
(remote_domain_event_block_job_2_msg): New struct.
(REMOTE_PROC_DOMAIN_EVENT_BLOCK_JOB_2): New RPC.
* src/remote/remote_driver.c
(remoteDomainBuildEventBlockJob2): New handler.
(remoteEvents): Register new event.
* daemon/remote.c (remoteRelayDomainEventBlockJob2): New handler.
(domainEventCallbacks): Register new event.
* tools/virsh-domain.c (vshEventCallbacks): Likewise.
(vshEventBlockJobPrint): Adjust client.
* src/remote_protocol-structs: Regenerate.

Signed-off-by: Eric Blake <eblake@redhat.com>
2014-06-19 06:54:12 -06:00
Eric Blake
7b7bf00110 conf: store mirroring information in virStorageSource
The current implementation of 'virsh blockcopy' (virDomainBlockRebase)
is limited to copying to a local file name.  But future patches want
to extend it to also copy to network disks.  This patch converts over
to a virStorageSourcePtr, although it should have no semantic change
visible to the user, in anticipation of those future patches being
able to use more fields for non-file destinations.

* src/conf/domain_conf.h (_virDomainDiskDef): Change type of
mirror information.
* src/conf/domain_conf.c (virDomainDiskDefParseXML): Localize
mirror parsing into new object.
(virDomainDiskDefFormat): Adjust clients.
* src/qemu/qemu_domain.c (qemuDomainDeviceDefPostParse):
Likewise.
* src/qemu/qemu_driver.c (qemuDomainBlockPivot)
(qemuDomainBlockJobImpl, qemuDomainBlockCopy): Likewise.

Signed-off-by: Eric Blake <eblake@redhat.com>
2014-06-06 09:56:28 -06:00
Eric Blake
c123ef7104 conf: store disk source as pointer, for easier manipulation
As part of the work on backing chains, I'm finding that it would
be easier to directly manipulate chains of pointers (adding a
snapshot merely adjusts pointers to form the correct list) rather
than copy data from one struct to another.  This patch converts
domain disk source to be a pointer.

In this patch, the pointer is ALWAYS allocated (thanks in part to
the previous patch forwarding all disk def allocation through a
common point), and all other changse are just mechanical fallout of
the new type; there should be no functional change.  It is possible
that we may want to leave the pointer NULL for a cdrom with no
medium in a later patch, but as that requires a closer audit of the
source to ensure we don't fault on a null dereference, I didn't do
it here.

* src/conf/domain_conf.h (_virDomainDiskDef): Change type of src.
* src/conf/domain_conf.c: Adjust all clients.
* src/security/security_selinux.c: Likewise.
* src/qemu/qemu_domain.c: Likewise.
* src/qemu/qemu_command.c: Likewise.
* src/qemu/qemu_conf.c: Likewise.
* src/qemu/qemu_process.c: Likewise.
* src/qemu/qemu_migration.c: Likewise.
* src/qemu/qemu_driver.c: Likewise.
* src/lxc/lxc_driver.c: Likewise.
* src/lxc/lxc_controller.c: Likewise.
* tests/securityselinuxlabeltest.c: Likewise.

Signed-off-by: Eric Blake <eblake@redhat.com>
2014-06-06 09:56:28 -06:00
Jiri Denemark
47f424c2d9 qemu: Process DEVICE_DELETED event in a separate thread
Currently, we don not acquire any job when removing a device after
DEVICE_DELETED event was received from QEMU. This means that if there is
another API running at the time DEVICE_DELETED is delivered and the API
acquired a job, we may happily change the definition of the domain the
API is working with whenever it unlocks the domain object (e.g., to talk
with its monitor). That said, we have to acquire a job before finishing
device removal to make things safe. However, doing so in the main event
loop would cause a deadlock so we need to move most of the event handler
into a separate thread.

Another good reason for both acquiring a job and handling the event in a
separate thread is that we currently remove a device backend immediately
after removing its frontend while we should only remove the backend once
we already received DEVICE_DELETED event. That is, we will have to talk
to QEMU monitor from the event handler.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
2014-06-02 16:47:36 +02:00
Jiri Denemark
4670f1dd02 qemu: Finish device removal in the original thread
If QEMU supports DEVICE_DELETED event, we always call
qemuDomainRemoveDevice from the event handler. However, we will need to
push this call away from the main event loop and begin a job for it (see
the following commit), we need to make sure the device is fully removed
by the original thread (and within its existing job) in case the
DEVICE_DELETED event arrives before qemuDomainWaitForDeviceRemoval times
out.

Without this patch, device removals would be guaranteed to never finish
before the timeout because the could would be blocked by the original
job being still active.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
2014-06-02 16:47:36 +02:00
Ján Tomko
205010c40e Clean up chardev sockets on QEMU shutdown
https://bugzilla.redhat.com/show_bug.cgi?id=1088787

Clean up unix socket files for chardevs using mode='bind',
like we clean up the monitor socket.
They are created by QEMU on startup and not really useful
after shutting it down.
2014-05-26 15:17:54 +02:00
Laine Stump
b62d67da3e qemu: fix RTC_CHANGE event for <clock offset='variable' basis='utc'/>
commit e31b5cf393 attempted to fix libvirt's
VIR_DOMAIN_EVENT_ID_RTC_CHANGE, which is documentated to always
provide the new offset of the domain's real time clock from UTC. The
problem was that, in the case that qemu is provided with an "-rtc
base=x" where x is an absolute time (rather than "utc" or
"localtime"), the offset sent by qemu's RTC_CHANGE event is *not* the
new offset from UTC, but rather is the sum of all changes to the
domain's RTC since it was started with base=x.

So, despite what was said in commit e31b5cf393, if we assume that
the original value stored in "adjustment" was the offset from UTC at
the time the domain was started, we can always determine the current
offset from UTC by simply adding the most recent (i.e. current) offset
from qemu to that original adjustment.

This patch accomplishes that by storing the initial adjustment in the
domain's status as "adjustment0". Each time a new RTC_CHANGE event is
received from qemu, we simply add adjustment0 to the value sent by
qemu, store that as the new adjustment, and forward that value on to
any event handler.

This patch (*not* e31b5cf393, which should be reverted prior to
applying this patch) fixes:

https://bugzilla.redhat.com/show_bug.cgi?id=964177

(for the case where basis='utc'. It does not fix basis='localtime')
2014-05-26 13:58:09 +03:00
Laine Stump
b8efa6f2e3 Revert "qemu: Report the offset from host UTC for RTC_CHANGE event"
This reverts commit e31b5cf393.

This commit attempted to work around a bug in the offset value
reported by qemu's RTC_CHANGE event in the case that a variable base
date was given on the qemu commandline. The patch mixed up the math
involved in arriving at the corrected offset to report, and in the
process added an unnecessary private attribute to the clock
element. Since that element is private/internal and not used by anyone
else, it makes sense to simplify things by removing it.
2014-05-26 13:53:16 +03:00
Peter Krempa
b3e99ad8d6 qemu: process: Refresh backing chain info when reconnecting to qemu
Refresh the disk backing chains when reconnecting to a qemu process
after daemon restart. There are a few internal fields that don't get
refreshed from the XML. Until we are able to do that, let's reload all
the metadata by the backing chain crawler.
2014-05-23 09:25:51 +02:00
Jiri Denemark
b5e0532e04 qemu: Make qemuProcess{Start,Stop}CPUs easier to follow
As a side effect, the return value of qemuDomainObjEnterMonitorAsync is
not directly used as the return value of qemuProcess{Start,Stop}CPUs.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
2014-05-14 13:27:18 +02:00
Roman Bogorodskiy
353cf3707a qemu: extract common PCI handling functions
Move sharable PCI handling functions to domain_addr.[ch], and
change theirs prefix from 'qemu' to 'vir':

 - virDomainPCIAddressAsString;
 - virDomainPCIAddressBusSetModel;
 - virDomainPCIAddressEnsureAddr;
 - virDomainPCIAddressFlagsCompatible;
 - virDomainPCIAddressGetNextSlot;
 - virDomainPCIAddressReleaseSlot;
 - virDomainPCIAddressReserveAddr;
 - virDomainPCIAddressReserveNextSlot;
 - virDomainPCIAddressReserveSlot;
 - virDomainPCIAddressSetFree;
 - virDomainPCIAddressSetGrow;
 - virDomainPCIAddressSlotInUse;
 - virDomainPCIAddressValidate;

The only change here is function names, the implementation itself
stays untouched.

Extract common allocation code from DomainPCIAddressSetCreate
into virDomainPCIAddressSetAlloc.
2014-05-13 20:17:54 +04:00
Julio Faracco
1b14c449b8 util: use typedefs for enums in "src/util/" directory
In "src/util/" there are many enumeration (enum) declarations.
Sometimes, it's better using a typedef for variable types,
function types and other usages. Other enumeration will be
changed to typedef's in the future.

Signed-off-by: Julio Faracco <jcfaracco@gmail.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
2014-05-05 14:30:01 -06:00
Martin Kletzander
f6ec6af8a6 qemu: don't call virFileExists() for network type disks
Based on suggestion from Eric [1], because it might not get cleaned up
before the release, so to avoid potential errors.

[1] https://www.redhat.com/archives/libvir-list/2014-April/msg00929.html

Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
2014-04-29 10:32:27 +02:00
Eric Blake
09567144d6 hash: add common utility functions
I almost wrote a hash value free function that just called
VIR_FREE, then realized I couldn't be the first person to
do that.  Sure enough, it was worth factoring into a common
helper routine.

* src/util/virhash.h (virHashValueFree): New function.
* src/util/virhash.c (virHashValueFree): Implement it.
* src/util/virobject.h (virObjectFreeHashData): New function.
* src/libvirt_private.syms (virhash.h, virobject.h): Export them.
* src/nwfilter/nwfilter_learnipaddr.c (virNWFilterLearnInit): Use
common function.
* src/qemu/qemu_capabilities.c (virQEMUCapsCacheNew): Likewise.
* src/qemu/qemu_command.c (qemuDomainCCWAddressSetCreate):
Likewise.
* src/qemu/qemu_monitor.c (qemuMonitorGetBlockInfo): Likewise.
* src/qemu/qemu_process.c (qemuProcessWaitForMonitor): Likewise.
* src/util/virclosecallbacks.c (virCloseCallbacksNew): Likewise.
* src/util/virkeyfile.c (virKeyFileParseGroup): Likewise.
* tests/qemumonitorjsontest.c
(testQemuMonitorJSONqemuMonitorJSONGetBlockInfo): Likewise.

Signed-off-by: Eric Blake <eblake@redhat.com>
2014-04-07 06:14:45 -06:00
Eric Blake
3e92938656 conf: split security label structs to util/
In order to reuse the newly-created host-side disk struct in
the virstoragefile backing chain code, I first have to move
it to util/.  This starts the process, by first moving the
security label structures.

* src/conf/domain_conf.h (virDomainDefGenSecurityLabelDef)
(virDomainDiskDefGenSecurityLabelDef, virSecurityLabelDefFree)
(virSecurityDeviceLabelDefFree, virSecurityLabelDef)
(virSecurityDeviceLabelDef): Move...
* src/util/virseclabel.h: ...to new file.
(virSecurityLabelDefNew, virSecurityDeviceLabelDefNew): Rename the
GenSecurity functions.
* src/qemu/qemu_process.c (qemuProcessAttach): Adjust callers.
* src/security/security_manager.c (virSecurityManagerGenLabel):
Likewise.
* src/security/security_selinux.c
(virSecuritySELinuxSetSecurityFileLabel): Likewise.
* src/util/virseclabel.c: New file.
* src/conf/domain_conf.c: Move security code, and fix fallout.
* src/Makefile.am (UTIL_SOURCES): Build new file.
* src/libvirt_private.syms (domain_conf.h): Move symbols...
(virseclabel.h): ...to new section.

Signed-off-by: Eric Blake <eblake@redhat.com>
2014-04-01 10:38:12 -06:00
Ján Tomko
5922d05aec Indent top-level labels by one space in src/qemu/ 2014-03-25 14:58:39 +01:00
Eric Blake
4f20226664 conf: prepare to track multiple host source files per <disk>
It's finally time to start tracking disk backing chains in
<domain> XML.  The first step is to start refactoring code
so that we have an object more convenient for representing
each host source resource in the context of a single guest
<disk>.  Ultimately, I plan to move the new type into src/util
where it can be reused by virStorageFile, but to make the
transition easier to review, this patch just creates the
new type then fixes everything until it compiles again.

* src/conf/domain_conf.h (_virDomainDiskDef): Split...
(_virDomainDiskSourceDef): ...to new struct.
(virDomainDiskAuthClear): Use new type.
* src/conf/domain_conf.c (virDomainDiskDefFree): Split...
(virDomainDiskSourceDefClear): ...to new function.
(virDomainDiskGetType, virDomainDiskSetType)
(virDomainDiskGetSource, virDomainDiskSetSource)
(virDomainDiskGetDriver, virDomainDiskSetDriver)
(virDomainDiskGetFormat, virDomainDiskSetFormat)
(virDomainDiskAuthClear, virDomainDiskGetActualType)
(virDomainDiskDefParseXML, virDomainDiskSourceDefFormat)
(virDomainDiskDefFormat, virDomainDiskDefForeachPath)
(virDomainDiskDefGetSecurityLabelDef)
(virDomainDiskSourceIsBlockType): Adjust all users.
* src/lxc/lxc_controller.c (virLXCControllerSetupDisk):
Likewise.
* src/lxc/lxc_driver.c (lxcDomainAttachDeviceMknodHelper):
Likewise.
* src/qemu/qemu_command.c (qemuAddRBDHost, qemuParseRBDString)
(qemuParseDriveURIString, qemuParseGlusterString)
(qemuParseISCSIString, qemuParseNBDString)
(qemuDomainDiskGetSourceString, qemuBuildDriveStr)
(qemuBuildCommandLine, qemuParseCommandLineDisk)
(qemuParseCommandLine): Likewise.
* src/qemu/qemu_conf.c (qemuCheckSharedDevice)
(qemuAddISCSIPoolSourceHost, qemuTranslateDiskSourcePool):
Likewise.
* src/qemu/qemu_driver.c (qemuDomainUpdateDeviceConfig)
(qemuDomainPrepareDiskChainElement)
(qemuDomainSnapshotCreateInactiveExternal)
(qemuDomainSnapshotPrepareDiskExternalBackingInactive)
(qemuDomainSnapshotPrepareDiskInternal)
(qemuDomainSnapshotPrepare)
(qemuDomainSnapshotCreateSingleDiskActive)
(qemuDomainSnapshotUndoSingleDiskActive)
(qemuDomainBlockPivot, qemuDomainBlockJobImpl)
(qemuDomainBlockCopy, qemuDomainBlockCommit): Likewise.
* src/qemu/qemu_migration.c (qemuMigrationIsSafe): Likewise.
* src/qemu/qemu_process.c (qemuProcessGetVolumeQcowPassphrase)
(qemuProcessInitPasswords): Likewise.
* src/security/security_selinux.c
(virSecuritySELinuxSetSecurityFileLabel): Likewise.
* src/storage/storage_driver.c (virStorageFileInitFromDiskDef):
Likewise.
* tests/securityselinuxlabeltest.c (testSELinuxLoadDef):
Likewise.

Signed-off-by: Eric Blake <eblake@redhat.com>
2014-03-24 12:18:34 -06:00
Eric Blake
cd01d2ad51 conf: use disk source accessors in qemu/
Part of a series of cleanups to use new accessor methods.

* src/qemu/qemu_conf.c (qemuCheckSharedDevice)
(qemuAddSharedDevice, qemuRemoveSharedDevice, qemuSetUnprivSGIO):
Use accessors.
* src/qemu/qemu_domain.c (qemuDomainDeviceDefPostParse)
(qemuDomainObjCheckDiskTaint, qemuDomainSnapshotForEachQcow2Raw)
(qemuDomainCheckRemoveOptionalDisk, qemuDomainCheckDiskPresence)
(qemuDiskChainCheckBroken, qemuDomainDetermineDiskChain):
Likewise.
* src/qemu/qemu_hotplug.c (qemuDomainChangeEjectableMedia)
(qemuDomainCheckEjectableMedia)
(qemuDomainAttachVirtioDiskDevice, qemuDomainAttachSCSIDisk)
(qemuDomainAttachUSBMassstorageDevice)
(qemuDomainAttachDeviceDiskLive, qemuDomainRemoveDiskDevice)
(qemuDomainDetachVirtioDiskDevice, qemuDomainDetachDiskDevice):
Likewise.
* src/qemu/qemu_migration.c (qemuMigrationStartNBDServer)
(qemuMigrationDriveMirror, qemuMigrationCancelDriveMirror)
(qemuMigrationIsSafe): Likewise.
* src/qemu/qemu_process.c (qemuProcessGetVolumeQcowPassphrase)
(qemuProcessHandleIOError, qemuProcessHandleBlockJob)
(qemuProcessInitPasswords): Likewise.
* src/qemu/qemu_driver.c (qemuDomainChangeDiskMediaLive)
(qemuDomainGetBlockInfo, qemuDiskPathToAlias): Likewise.

Signed-off-by: Eric Blake <eblake@redhat.com>
2014-03-24 11:59:50 -06:00
Eric Blake
3566599a2f qemu: enable monitor event reporting
Wire up all the pieces to send arbitrary qemu events to a
client using libvirt-qemu.so.  If the extra bookkeeping of
generating event objects even when no one is listening turns
out to be noticeable, we can try to further optimize things
by adding a counter for how many connections are using events,
and only dump events when the counter is non-zero; but for
now, I didn't think it was worth the code complexity.

* src/qemu/qemu_driver.c
(qemuConnectDomainQemuMonitorEventRegister)
(qemuConnectDomainQemuMonitorEventDeregister): New functions.
* src/qemu/qemu_monitor.h (qemuMonitorEmitEvent): New prototype.
(qemuMonitorDomainEventCallback): New typedef.
* src/qemu/qemu_monitor_json.c (qemuMonitorJSONIOProcessEvent):
Report events.
* src/qemu/qemu_monitor.c (qemuMonitorEmitEvent): New function, to
pass events through.
* src/qemu/qemu_process.c (qemuProcessHandleEvent): Likewise.

Signed-off-by: Eric Blake <eblake@redhat.com>
2014-03-20 11:25:37 -06:00
Daniel P. Berrange
2835c1e730 Add virLogSource variables to all source files
Any source file which calls the logging APIs now needs
to have a VIR_LOG_INIT("source.name") declaration at
the start of the file. This provides a static variable
of the virLogSource type.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2014-03-18 14:29:22 +00:00
Cole Robinson
e8400564c8 qemu: XMLToNative: Don't show -S
-S causes qemu to start in the paused state. Since XML2Native is intended
to generate something that users can run directly, this will trip them up.
2014-03-14 17:33:29 -04:00
Roman Bogorodskiy
075650ff40 qemu: cleanup tap devices on FreeBSD
We have to explicitly destroy TAP devices on FreeBSD because
they're not freed after being closed, otherwise we end up with
orphaned TAP devices after destroying a domain.
2014-03-14 15:45:51 +01:00
Chunyan Liu
7be4bddea1 Capitalize USB, PCI and SCSI in hostdev methods
Change any method names with Usb, Pci or Scsi to use
USB, PCI and SCSI since they are abbreviations.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2014-03-12 16:20:01 +00:00
Chunyan Liu
899b261127 move virHostdevPrepare(ReAttach)PCIDevices to virhostdev.c 2014-03-12 16:03:05 +00:00
Chunyan Liu
e3c9e3a35b qemu_hostdev: move ColdBoot as a flag
For extracting hostdev codes from qemu_hostdev.c to common library, change qemu
specific COLD_BOOT handling to be a flag, and pass it to hostdev functions.
2014-03-12 16:03:04 +00:00
Chunyan Liu
3a331da883 qemu_hostdev: move cfg->relaxedACS as a flag
For extracting hostdev codes from qemu_hostdev.c to common library, change qemu
specific cfg->relaxedACS handling to be a flag, and pass it to hostdev
functions.
2014-03-12 16:03:04 +00:00
Daniel P. Berrange
06e788e518 Fix sec label setup when attaching to QEMU processes
When attaching to a QEMU process, the def->seclabels array is
going to be empty. The qemuProcessAttach method must thus
populate it with data for the security drivers.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2014-03-12 13:14:38 +00:00
Daniel P. Berrange
cfb92c9b0c Remove broken error reporting in QEMU mac filtering
The qemu_bridge_filter.c file had some helpers for calling
the ebtablesXXX functions todo bridge filtering. The only
thing these helpers did was to overwrite the original error
message from the ebtables code. For added fun, the callers
of these helpers overwrote the errors yet again. For even
more fun, one of the helpers called another helper and
overwrite its errors too.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2014-03-11 11:04:55 +00:00
Michal Privoznik
f1ab06e43d network: Introduce network hooks
There might be some use cases, where user wants to prepare the host or
its environment prior to starting a network and do some cleanup after
the network has been shut down. Consider all the functionality that
libvirt doesn't currently have as an example what a hook script can
possibly do.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2014-02-18 14:46:49 +01:00
Pradipta Kr. Banerjee
cd921cf077 Handle non-sequential NUMA node numbers
On some platforms like IBM PowerNV the NUMA node numbers can be
non-sequential. For eg. numactl --hardware o/p from such a machine looks
as given below

node distances:
   node   0   1  16  17
     0:  10  40  40  40
     1:  40  10  40  40
    16:  40  40  10  40
    17:  40  40  40  10

The NUMA nodes are 0,1,16,17

Libvirt uses sequential index as NUMA node numbers and this can
result in crash or incorrect results.

Signed-off-by: Shivaprasad G Bhat <sbhat@linux.vnet.ibm.com>
Signed-off-by: Pradipta Kr. Banerjee <bpradip@in.ibm.com>
2014-02-11 14:44:20 +00:00
Peter Krempa
9bf629ab60 qemu: Use correct permissions when determining the image chain
The code took into account only the global permissions. The domains now
support per-vm DAC labels and per-image DAC labels. Use the most
specific label available.
2014-02-10 15:49:59 +01:00
Eric Blake
25221a1b21 maint: avoid nested use of virConnect{Ref,Close}
The public virConnectRef and virConnectClose API are just thin
wrappers around virObjectRef/virObjectRef, with added object
validation and an error reset.  Within our backend drivers, use
of the object validation is just an inefficiency since we always
pass valid objects.  More important to think about is what
happens with the error reset; our uses of virConnectRef happened
to be safe (since we hadn't encountered any earlier errors), but
in several cases the use of virConnectClose could lose a real
error.

Ideally, we should also avoid calling virConnectOpen() from
within backend drivers - but that is a known situation that
needs much more design work.

* src/qemu/qemu_process.c (qemuProcessReconnectHelper)
(qemuProcessReconnect): Avoid nested public API call.
* src/qemu/qemu_driver.c (qemuAutostartDomains)
(qemuStateInitialize, qemuStateStop): Likewise.
* src/qemu/qemu_migration.c (doPeer2PeerMigrate): Likewise.
* src/storage/storage_driver.c (storageDriverAutostart):
Likewise.
* src/uml/uml_driver.c (umlAutostartConfigs): Likewise.
* src/lxc/lxc_process.c (virLXCProcessAutostartAll): Likewise.
(virLXCProcessReboot): Likewise, and avoid leaking conn on error.

Signed-off-by: Eric Blake <eblake@redhat.com>
2014-01-16 12:25:45 -07:00
Peter Krempa
b952cbbcca qemu: Avoid operations on NULL monitor if VM fails early
https://bugzilla.redhat.com/show_bug.cgi?id=1047659

If a VM dies very early during an attempted connect to the guest agent
while the locks are down the domain monitor object will be freed. The
object is then accessed later as any failure during guest agent startup
isn't considered fatal.

In the current upstream version this doesn't lead to a crash as
virObjectLock called when entering the monitor in
qemuProcessDetectVcpuPIDs checks the pointer before attempting to
dereference (lock) it. The NULL pointer is then caught in the monitor
helper code.

Before the introduction of virObjectLockable - observed on 0.10.2 - the
pointer is locked directly via virMutexLock leading to a crash.

To avoid this problem we need to differentiate between the guest agent
not being present and the VM quitting when the locks were down. The fix
reorganizes the code in qemuConnectAgent to add the check and then adds
special handling to the callers.
2014-01-15 18:04:25 +01:00
Michal Privoznik
088ff08ce9 qemuProcessStop: Don't overwrite any errors
Currently, the qemuProcessStop tries to open the domain log file
and saves the original error afterwards. Then all the cleanup is
done after which the error is restored back. This has however one
flaw: if opening of the log file fails an error is reported,
which results in previous error being overwritten (the useful
one, e.g. "PCI device XXXX:XXXX could not be found"). Hence, user
sees something like:

  error: failed to create logfile /var/log/libvirt/qemu/ovirt_usb.log: No such file or directory

instead of:

  error: internal error: Did not find USB device 8644:8003

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reported-by: Zhou Yimin <zhouyimin@huawei.com>
2014-01-07 14:50:40 +01:00
Martin Kletzander
b5857eb5be qemu: fix typo PCi => PCI
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
2013-12-16 17:31:10 +01:00
Michal Privoznik
11e44d66fd qemu_process: Read errors from child
https://bugzilla.redhat.com/show_bug.cgi?id=1035955

There's a window when starting a qemu process between fork() and exec()
during which we are doing things that may fail but not tunnelling the
error to the daemon. This is basically all within qemuProcessHook().
So whenever we fail in something, e.g. placing a process onto numa node,
users are left with:

    error: Child quit during startup handshake: Input/output error

while the original error is thrown into the domain log:

    libvirt:  error : internal error: NUMA memory tuning in 'preferred'
    mode only supports single node

Hence, we should read the log file and search for the error message and
report it to users.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2013-12-10 15:36:17 +01:00
Cédric Bosdonnat
67d91cb2bd Use virObjectEventPtr instead of virDomainEventPtr
The virDomainEvent class is kept as it indicates what meta informations
are valid for the children classes. This may be useful in the future.
2013-12-10 12:45:21 +00:00
Cédric Bosdonnat
6ffce0f698 Renamed virDomainEventNew* to virDomainEventLifecycleNew*
This aims at providing some consistency with other domain events
2013-12-10 12:27:37 +00:00
Ján Tomko
8c41794af8 Return -1 in virPortAllocatorAcquire if all ports are used
Report the error in virPortAllocatorAcquire instead
of doing it in every caller.

The error contains the port range name instead of the intended
use for the port, e.g.:
Unable to find an unused port in range 'display' (65534-65535)
instead of:
Unable to find an unused port for SPICE

This also adds error reporting when the QEMU driver could not
find an unused port for VNC, VNC WebSockets or NBD migration.
2013-11-18 12:28:07 +01:00
Ján Tomko
28ea39a004 Don't release spice port twice when no TLS port is available
Introduced by 7b4a630.
2013-11-18 12:26:59 +01:00
Michal Privoznik
3367c21dad qemuProcessReconnectHelper: Don't create joinable thread
In the qemuProcessReconnectHelper() a new thread that does all the
interesting work is spawned. The rationale is to not block the daemon
startup process in case of unresponsive qemu. However, the thread
handler is a local variable which gets lost once the control goes out of
scope. Hence the thread gets leaked. We can avoid this if the thread
isn't made joinable.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2013-11-14 17:44:20 +01:00
Peter Krempa
a6a6f84af9 qemu: Change return type of qemuMonitorGetGuestCPU()
To allow returning more granular errors, change the error type to an
integer.
2013-11-12 19:35:51 +01:00
Peter Krempa
d94b781771 qemu: process: Validate specific CPUID flags of a guest
When starting a VM the qemu process may filter out some requested
features of a domain as it's not supported either by the host or by
qemu. Libvirt didn't check if this happened which might end up in
changing of the guest ABI when migrating.

The proof of concept implementation adds the check for the recently
introduced kvm_pv_unhalt cpuid feature bit. This feature depends on both
qemu and host kernel support and thus increase the possibility of guest
ABI breakage.
2013-11-08 09:44:42 +01:00
Michal Privoznik
5a4c2374a2 qemu: Avoid double free of VM
One of my previous patches (c7ac2519b7) did try to fix the issue when
domain dies too soon during migration. However, this clumsy approach was
missing removal of qemuProcessHandleMonitorDestroy resulting in double
unrefing of mon->vm and hence producing the daemon crash:

==11843== Invalid read of size 4
==11843==    at 0x50C28C5: virObjectUnref (virobject.c:255)
==11843==    by 0x1148F7DB: qemuMonitorDispose (qemu_monitor.c:258)
==11843==    by 0x50C2991: virObjectUnref (virobject.c:262)
==11843==    by 0x50C2D13: virObjectFreeCallback (virobject.c:388)
==11843==    by 0x509C37B: virEventPollCleanupHandles (vireventpoll.c:583)
==11843==    by 0x509C711: virEventPollRunOnce (vireventpoll.c:652)
==11843==    by 0x509A620: virEventRunDefaultImpl (virevent.c:274)
==11843==    by 0x520D21C: virNetServerRun (virnetserver.c:1112)
==11843==    by 0x11F368: main (libvirtd.c:1513)
==11843==  Address 0x13b88864 is 4 bytes inside a block of size 136 free'd
==11843==    at 0x4A07F5C: free (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==11843==    by 0x5079A2F: virFree (viralloc.c:580)
==11843==    by 0x50C29E3: virObjectUnref (virobject.c:270)
==11843==    by 0x114770E4: qemuProcessHandleMonitorDestroy (qemu_process.c:1103)
==11843==    by 0x1148F7CB: qemuMonitorDispose (qemu_monitor.c:257)
==11843==    by 0x50C2991: virObjectUnref (virobject.c:262)
==11843==    by 0x50C2D13: virObjectFreeCallback (virobject.c:388)
==11843==    by 0x509C37B: virEventPollCleanupHandles (vireventpoll.c:583)
==11843==    by 0x509C711: virEventPollRunOnce (vireventpoll.c:652)
==11843==    by 0x509A620: virEventRunDefaultImpl (virevent.c:274)
==11843==    by 0x520D21C: virNetServerRun (virnetserver.c:1112)
==11843==    by 0x11F368: main (libvirtd.c:1513)

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2013-11-08 07:31:02 +01:00