2117 Commits

Author SHA1 Message Date
Peter Krempa
e0316b5ebd qemu: Use proper agent entering function when freezing filesystems
When doing snapshots, the filesystem freeze function used the agent
entering function that expects the qemud_driver unlocked. This might
cause a deadlock of the qemu driver if the agent does not respond.

The only call path of this function has the qemud_driver locked, so this
patch changes the entering functions to those expecting the driver
locked.
2012-10-02 11:40:32 +02:00
Daniel P. Berrange
43e23c73af Add support for detecting capablities using QMP commands
Start a QEMU process using

   $QEMU -S -no-user-config -nodefaults \
         -nographic -M none -qmp unix:/some/path,server,nowait

and talk QMP over stdio to discover what capabilities the
binary supports. This works for QEMU 1.2.0 or later and
for older QEMU automatically fallback to the old approach
of parsing -help and related command line args.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-28 16:50:51 +01:00
Daniel P. Berrange
295bda40da Ignore error from query-cpu-definitions
Some architectures provide the query-cpu-definitions command,
but are set to always return a "GenericError" from it :-(
Catch this & treat it as if there was an empty list of CPUs
returned

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-28 16:50:51 +01:00
Daniel P. Berrange
89563efc02 Avoid bogus I/O event errors when closing the QEMU monitor
After calling qemuMonitorClose(), it is still possible for
the QEMU monitor I/O event callback to get invoked. This
will trigger an error message because mon->fd has been set
to -1 at this point. Silently ignore the case where mon->fd
is -1, likewise for mon->watch being zero.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-28 16:50:51 +01:00
Daniel P. Berrange
8e122c2cdf Remove need to pass in a virDomainObjPtr instance to qemuMonitorOpen
The qemuMonitorOpen method only needs a virDomainObjPtr in order
to access the QEMU pid. This is not critical when detecting the
QEMU capabilties, so can easily be skipped

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-28 16:50:51 +01:00
Daniel P. Berrange
72574808d6 Fix QEMU test with 1.2.0 help output
The help output for QEMU 1.2.0 changed 'pci-assign' to 'kvm-pci-assign'.
Since the new capabilities code does exact device name matching
instead of substring matching, this caused the capabilities to go
missing.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-28 16:50:31 +01:00
Daniel P. Berrange
b073fe40db Refactor qemuCapsParseDeviceStr to work from data tables
Currently the qemuCapsParseDeviceStr method has a bunch of open
coded string searches/comparisons to detect devices and their
properties. Soon this data will be obtained from QMP queries
instead of -device help output. Maintaining the list of device
and properties in two places is undesirable. Thus the existing
qemuCapsParseDeviceStr() method needs to be refactored to
separate the device types and properties from the actual
search code.

Thus the -device help output is now parsed to construct a
list of device names, and device properties. These are then
checked against a set of datatables to set the capability
flags

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-28 11:25:49 +01:00
Daniel P. Berrange
7ccc4d52bd Fix regression starting QEMU instances without query-events
If QEMU reports CommandNotFound for the 'query-events' command,
we must treat that as success, returning a zero-length array
of events

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-27 17:39:39 +01:00
Daniel P. Berrange
1b21351b93 Move command/event capabilities detection out of QEMU monitor code
The qemuMonitorSetCapabilities() API is used to initialize the QMP
protocol capabilities. It has since been abused to initialize some
libvirt internal capabilities based on command/event existance too.
Move the latter code out into qemuCapsProbeQMP() in the QEMU
capabilities source file instead

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-27 11:06:04 +01:00
Daniel P. Berrange
c25746c216 Remove some unused includes in QEMU code
The qemu monitor does not require qemu_conf.h, and the
qemu capabilities code actually wants bitmap.h

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-27 11:06:01 +01:00
Daniel P. Berrange
364a77ff0f Add a qemuMonitorGetTargetArch() method for QMP query-target command
Add a new qemuMonitorGetTargetArch() method to support invocation
of the 'query-target' JSON monitor command. No HMP equivalent
is required, since this will only be present for QEMU >= 1.2

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-27 11:06:00 +01:00
Daniel P. Berrange
b785cec0dc Add a qemuMonitorGetObjectProps() method for QMP device-list-properties command
Add a new qemuMonitorGetObjectProps() method to support invocation
of the 'device-list-properties' JSON monitor command. No HMP equivalent
is required, since this will only be present for QEMU >= 1.2

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-27 11:05:16 +01:00
Daniel P. Berrange
2ccaa8e6ba Add a qemuMonitorGetObjectTypes() method for QMP qom-list-types command
Add a new qemuMonitorGetObjectTypes() method to support invocation
of the 'qom-list-types' JSON monitor command. No HMP equivalent
is required, since this will only be present for QEMU >= 1.2

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-27 11:05:00 +01:00
Daniel P. Berrange
3b565d3f46 Add a qemuMonitorGetEvents() method for QMP query-events command
Add a new qemuMonitorGetEvents() method to support invocation
of the 'query-events' JSON monitor command. No HMP equivalent
is required, since this will only be used when JSON is available

The existing qemuMonitorJSONCheckEvents() method is refactored
to use this new method

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-27 11:04:57 +01:00
Daniel P. Berrange
c70a6154b6 Add a qemuMonitorGetCommands() method for QMP query-commands command
Add a new qemuMonitorGetCPUCommands() method to support invocation
of the 'query-commands' JSON monitor command. No HMP equivalent
is required, since this will only be used when JSON is available

The existing qemuMonitorJSONCheckCommands() method is refactored
to use this new method

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-27 11:04:32 +01:00
Daniel P. Berrange
2ecec6e206 Add a qemuMonitorGetCPUDefinitions method for QMP query-cpu-definitions command
Add a new qemuMonitorGetCPUDefinitions() method to support invocation
of the 'query-cpu-definitions' JSON monitor command. No HMP equivalent
is required, since this will only be present for QEMU >= 1.2

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-27 10:53:24 +01:00
Daniel P. Berrange
3999372182 Add a qemuMonitorGetMachines() method for QMP query-machines command
Add a new qemuMonitorGetMachines() method to support invocation
of the 'query-machines' JSON monitor command. No HMP equivalent
is required, since this will only be present for QEMU >= 1.2

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-27 10:47:16 +01:00
Daniel P. Berrange
3dce0a829a Add a qemuMonitorGetVersion() method for QMP query-version command
Add a new qemuMonitorGetVersion() method to support invocation
of the 'query-version' JSON monitor command. No HMP equivalent
is provided, since this will only be used for QEMU >= 1.2

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-27 10:46:34 +01:00
Daniel P. Berrange
1517099c7b Refactor guest init to support qemu-system-i386 binary too
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-27 10:46:08 +01:00
Daniel P. Berrange
de9be0ab4d Remove xenner support
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-27 10:44:58 +01:00
Daniel P. Berrange
ca58a1b06c Make qemuCapsProbeMachineTypes & qemuCapsProbeCPUModels static
The qemuCapsProbeMachineTypes & qemuCapsProbeCPUModels methods
do not need to be invoked directly anymore. Make them static
and refactor them to directly populate the qemuCapsPtr object

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-27 10:44:57 +01:00
Daniel P. Berrange
ed769e1854 Remove probing of CPU models when launching QEMU guests
When launching a QEMU guest the binary is probed to discover
the list of supported CPU names. Remove this probing with a
simple lookup of CPU models in the qemuCapsPtr object. This
avoids another invocation of the QEMU binary during the
startup path.

As a nice benefit we can now remove all the nasty hacks from
the test suite which were done to avoid having to exec QEMU
on the test system. The building of the -cpu command line
can just rely on data we pre-populate in qemuCapsPtr.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-27 10:24:52 +01:00
Daniel P. Berrange
bd66c243b3 Remove probing of machine types when canonicalizing XML
When XML for a new guest is received, the machine type is
immediately canonicalized into the version specific name.
This involves probing QEMU for supported machine types.
Replace this probing with a lookup of the machine types
in the (hopefully cached) qemuCapsPtr object

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-27 10:24:52 +01:00
Daniel P. Berrange
15ee6614f7 Remove probing of flags when launching QEMU guests
Remove all use of the existing APIs for querying QEMU
capability flags. Instead obtain a qemuCapsPtr object
from the global cache. This avoids the execution of
'qemu -help' (and related commands) when launching new
guests.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-27 10:24:52 +01:00
Daniel P. Berrange
494e2f5cc2 Switch over to use cache for building QEMU capabilities
When building up a virCapsPtr instance, the QEMU driver
was copying the list of machine types across from the
previous virCapsPtr instance, if the QEMU binary had not
changed. Replace this ad-hoc caching of data with use
of the new qemuCapsCache global cache.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-27 10:24:52 +01:00
Daniel P. Berrange
85a7b5e1ce Add a qemu capabilities cache manager
Introduce a qemuCapsCachePtr object to provide a global cache
of capabilities for QEMU binaries. The cache auto-populates
on first request for capabilities about a binary, and will
auto-refresh if the binary has changed since a previous cache
was populated

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-27 10:24:52 +01:00
Daniel P. Berrange
3887afbb6b Fix handling of itanium arch name in QEMU driver
For historical compat we use 'itanium' as the arch name, so
if the QEMU binary suffix is 'ia64' we need to translate it

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-27 10:24:52 +01:00
Daniel P. Berrange
362d04779c Fix potential deadlock when agent is closed
If the qemuAgentClose method is called from a place which holds
the domain lock, it is theoretically possible to get a deadlock
in the agent destroy callback. This has not been observed, but
the equivalent code in the QEMU monitor destroy callback has seen
a deadlock.

Remove the redundant locking while unrefing the object and the
bogus assignment

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-27 10:11:44 +01:00
Daniel P. Berrange
5cbb0d37d4 Use size_t instead of int for virDomainDefPtr struct
Many parts of virDomainDefPtr were using 'int' variables as
array length counts. Replace all these with size_t and update
various format strings & API signatures to adapt

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-27 10:11:44 +01:00
Daniel P. Berrange
25f582e36a Fix (rare) deadlock in QEMU monitor callbacks
Some users report (very rarely) seeing a deadlock in the QEMU
monitor callbacks

 Thread 10 (Thread 0x7fcd11e20700 (LWP 26753)):
 #0  0x00000030d0e0de4d in __lll_lock_wait () from /lib64/libpthread.so.0
 #1  0x00000030d0e09ca6 in _L_lock_840 () from /lib64/libpthread.so.0
 #2  0x00000030d0e09ba8 in pthread_mutex_lock () from /lib64/libpthread.so.0
 #3  0x00007fcd162f416d in virMutexLock (m=<optimized out>)
     at util/threads-pthread.c:85
 #4  0x00007fcd1632c651 in virDomainObjLock (obj=<optimized out>)
     at conf/domain_conf.c:14256
 #5  0x00007fcd0daf05cc in qemuProcessHandleMonitorDestroy (mon=0x7fcccc0029e0,
     vm=0x7fcccc00a850) at qemu/qemu_process.c:1026
 #6  0x00007fcd0db01710 in qemuMonitorDispose (obj=0x7fcccc0029e0)
     at qemu/qemu_monitor.c:249
 #7  0x00007fcd162fd4e3 in virObjectUnref (anyobj=<optimized out>)
     at util/virobject.c:139
 #8  0x00007fcd0db027a9 in qemuMonitorClose (mon=<optimized out>)
     at qemu/qemu_monitor.c:860
 #9  0x00007fcd0daf61ad in qemuProcessStop (driver=driver@entry=0x7fcd04079d50,
     vm=vm@entry=0x7fcccc00a850,
     reason=reason@entry=VIR_DOMAIN_SHUTOFF_DESTROYED, flags=flags@entry=0)
     at qemu/qemu_process.c:4057
 #10 0x00007fcd0db323cf in qemuDomainDestroyFlags (dom=<optimized out>,
     flags=<optimized out>) at qemu/qemu_driver.c:1977
 #11 0x00007fcd1637ff51 in virDomainDestroyFlags (
     domain=domain@entry=0x7fccf00c1830, flags=1) at libvirt.c:2256

At frame #10 we are holding the domain lock, we call into
qemuProcessStop() to cleanup QEMU, which triggers the monitor
to close, which invokes qemuProcessHandleMonitorDestroy() which
tries to obtain the domain lock again. This is a non-recursive
lock, hence hang.

Since qemuMonitorPtr is a virObject, the unref call in
qemuProcessHandleMonitorDestroy no longer needs mutex
protection. The assignment of priv->mon = NULL, can be
instead done by the caller of qemuMonitorClose(), thus
removing all need for locking.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-27 10:11:44 +01:00
Daniel P. Berrange
0b62c0736a Don't skip over socket label cleanup
If QEMU quits immediately after we opened the monitor it was
possible we would skip the clearing of the SELinux process
socket context

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-27 10:11:44 +01:00
Daniel P. Berrange
8fd3823117 Move most of qemuProcessKill into virProcessKillPainfully
In the cgroups APIs we have a virCgroupKillPainfully function
which does the loop sending SIGTERM, then SIGKILL and waiting
for the process to exit. There is similar functionality for
simple processes in qemuProcessKill, but it is tangled with
the QEMU code. Untangle it to provide a virProcessKillPainfuly
function

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-27 10:11:44 +01:00
Daniel P. Berrange
f1b4021b38 Don't ignore return value of qemuProcessKill
When calling qemuProcessKill from the virDomainDestroy impl
in QEMU, do not ignore the return value. This ensures that
if QEMU fails to respond to SIGKILL, the caller will know
about the failure.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-27 10:11:44 +01:00
Michal Privoznik
3521cd1c32 qemu: wait for SPICE to migrate
Recently, there have been some improvements made to qemu so it
supports seamless migration or something very close to it.
However, it requires libvirt interaction. Once qemu is migrated,
the SPICE server needs to send its internal state to the destination.
Once it's done, it fires SPICE_MIGRATE_COMPLETED event and this
fact is advertised in 'query-spice' output as well.
We must not kill qemu until SPICE server finishes the transfer.
2012-09-26 11:42:59 +02:00
Daniel P. Berrange
639d5c4966 Don't use O_TRUNC when opening QEMU logfiles
SELinux wants all log files opened with O_APPEND. When
running non-root though, libvirtd likes to use O_TRUNC
to avoid log files growing in size indefinitely. Instead
of using O_TRUNC though, we can use O_APPEND and then
call ftruncate() which keeps SELinux happier.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-26 10:37:15 +01:00
Daniel P. Berrange
7307c3c00c Simplify some redundant locking while unref'ing objects
There is no need to hold the mutex when unref'ing
virObject instances

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-26 10:09:58 +01:00
Daniel P. Berrange
e5e2b65cf8 Move virProcessKill into virprocess.{h,c}
There are a number of process related functions spread
across multiple files. Start to consolidate them by
creating a virprocess.{c,h} file

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-26 10:09:57 +01:00
Daniel P. Berrange
cf470068a1 Rename virKillProcess to virProcessKill
Changing naming to follow the convention of "object" followed
by "action"

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-26 10:09:57 +01:00
Peter Krempa
35fe4e7e2e qemu: Avoid holding the driver lock in trivial snapshot API's
In most of the snapshot API's there's no need to hold the driver lock
the whole time.

This patch adds helper functions that get the domain object in functions
that don't require the driver lock and simplifies call paths from
snapshot-related API's.
2012-09-25 17:05:41 +02:00
Tang Chen
9ce64e6aae Remove redundant lines in src/qemu/qemu_driver.c
maxcpu and hostcpus are defined and calculated in qemudDomainPinVcpuFlags()
and qemudDomainPinEmulator(), but never used. So remove them including nodeinfo.

Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
2012-09-21 12:49:47 -06:00
Jiri Denemark
8125113cdb qemu: Fix failure path in disk hotplug
Disk hotplug is a two phase action: qemuMonitorAddDrive followed by
qemuMonitorAddDevice. When the first part succeeds but the second one
fails, we need to rollback the drive addition.
2012-09-21 12:23:01 +02:00
Tang Chen
1437ea6f48 Remove a redundant line in src/qemu/qemu_driver.c
Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
2012-09-21 12:16:25 +08:00
Eric Blake
4ecb723b9e maint: fix up copyright notice inconsistencies
https://www.gnu.org/licenses/gpl-howto.html recommends that
the 'If not, see <url>.' phrase be a separate sentence.

* tests/securityselinuxhelper.c: Remove doubled line.
* tests/securityselinuxtest.c: Likewise.
* globally: s/;  If/.  If/
2012-09-20 16:30:55 -06:00
Martin Kletzander
ff2d5a3d8a qemu: add support for dump-guest-core option
The "dump-guest-core' option is new option for the machine type
(-machine pc,dump-guest-core) that controls whether the guest memory
will be marked as dumpable.

While testing this, I've found out that the value for the '-M' options
is not parsed correctly when additional parameters are used. However,
when '-machine' is used for the same options, it gets parsed as
expected. That's why this patch also modifies the parsing and creating
of the command line, so both '-M' and '-machine' are recognized. In
QEMU's help there is only mention of the 'machine parameter now with
no sign of the older '-M'.
2012-09-20 16:41:07 +02:00
Martin Kletzander
94827a785d qemu: Add support for reboot-timeout
This patch adds support for "-boot reboot-timeout=rb_time" that is
added in QEMU.
2012-09-20 16:41:01 +02:00
Martin Kletzander
8c95290868 qemu: Cleanup boot parameter building
This patch cleans up building the "-boot" parameter and while on that
fixes one inconsistency by modifying these things:

 - I completed the unfinished virDomainBootMenu enum by specifying
   LAST, declaring it and also declaring the TypeFromString and
   TypeToString parameters.
 - Previously mentioned TypeFromString and TypeToString are used when
   parsing the XML.
 - Last, but not least, visible change is that the "-boot" parameter
   is built and parsed properly:
    - The "order=" prefix is used only when additional parameters are
      used (menu, etc.).
    - It's rewritten in a way that other parameters can be added
      easily in the future (used in following patch).
    - The "order=" parameter is properly parsed regardless to where it
      is placed in the string (e.g. "menu=on,order=nc").
    - The "menu=" parameter (and others in the future) are created
      when they should be (i.e. even when bootindex is supported and
      used, but not when bootloader is selected).
2012-09-20 10:59:35 +02:00
Michal Privoznik
a5e8beef4f qemu: Transition domain to PAUSED after 'stop' command
Currently, we mark domain PAUSED (but not emit an event)
just before we issue 'stop' on monitor; This command can
take ages to finish, esp. when domain's doing a lot of
IO - users can enforce qemu to open files with O_DIRECT
which doesn't return from write() until data reaches the
block device. Having said that, we report PAUSED even if
domain is not paused yet.
2012-09-20 10:15:27 +02:00
Ján Tomko
2a72e54c95 virBitmap: fix build without HAVE_NUMACTL
Commit 75b198b3e7b2c8b4106afbd42f8bb795c4773511 forgot to change
arguments of dummy qemuProcessInitNumaMemoryPolicy from char* to
virBitmapPtr.
2012-09-18 11:47:12 +02:00
Daniel Veillard
b1ba47ec54 Fix the augea test for qemu libvirtd options
Commit 1ccf22277be013beb3f26f0083867c9c9eddca18 forgot to
add the output to the augeas test
2012-09-18 16:28:43 +08:00
Ján Tomko
5f7861ca3f qemu: add -sandbox to command line if requested 2012-09-18 15:43:28 +08:00