We can exploit the fact that gcc warns about int-to-pointer conversion
in ternary cond?(void*):(int) in order to prevent future mistakes of
calling VIR_FREE on a scalar lvalue. For example, between commits
158ba873 and 802e2df, we would have had this warning:
cc1: warnings being treated as errors
remote.c: In function 'remoteDispatchListNetworks':
remote.c:3684:70: error: pointer/integer type mismatch in conditional expression
There are still a number of places that malloc into a const char*;
while it would probably be worth scrubbing them to use char*
instead, that is a separate patch, so we have to cast away const
in VIR_FREE for now.
* src/util/memory.h (VIR_FREE): Make gcc warn about integers.
Iteratively developed from a patch by Christophe Fergeau.
mingw lacks the counterpart to PTHREAD_MUTEX_INITIALIZER, so the
best we can do is portably expose once-only runtime initialization.
* src/util/threads.h (virOnceControlPtr): New opaque type.
(virOnceFunc): New callback type.
(virOnce): New prototype.
* src/util/threads-pthread.h (virOnceControl): Declare.
(VIR_ONCE_CONTROL_INITIALIZER): Define.
* src/util/threads-win32.h (virOnceControl)
(VIR_ONCE_CONTROL_INITIALIZER): Likewise.
* src/util/threads-pthread.c (virOnce): Implement in pthreads.
* src/util/threads-win32.c (virOnce): Implement in WIN32.
* src/libvirt_private.syms: Export it.
This patch strips reusable part of qemuDomainUpdateDeviceFlags()
and consolidate it to qemuDomainModifyDeviceFlags().
No functional changes.
* src/qemu/qemu_driver.c
(qemuDomainChangeDiskMediaLive) : pulled out code for updating disks.
(qemuDomainUpdateDeviceLive) : core of UpdateDevice, extracted from
UpdateDeviceFlags()
(qemuDomainModifyDeviceFlags): add support for updating device in live domain.
(qemuDomainUpdateDeviceFlags): reworked as a wrapper function of
qemuDomainModifyDeviceFlags()
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
clean up At(De)tachDeviceFlags() for consolidation.
qemuDomainAttachDeviceFlags()/qemuDomainDetachFlags()/
qemuDomainUpdateDeviceFlags() has similar logics and copied codes.
This patch series tries to unify them to use shared code when it can.
At first, clean up At(De)tachDeviceFlags() and devide it into functions.
By this, this patch pulls out shared components between functions.
Based on patch series by Eric Blake, I added some modification as
switch-case with QEMU_DEVICE_ATTACH, QEMU_DEVICE_DETACH, QEMU_DEVICE_UPDATE
* src/qemu/qemu_driver.c
(qemuDomainAt(De)tachDeviceFlags) : pulled out to qemuDomainModifyDeviceFlags()
(qemuDomainModifyDeviceFlags) : implements generic code for modifying domain.
(qemuDomainAt(De)tachDeviceFlagsLive) : code for at(de)taching devices to
domain in line. no changes in logic from old code.
(qemuDomainAt(De)tachDeviceDiskLive) : for at(de)taching Disks.
(qemuDomainAt(De)tachDeviceControllerLive) : for at(de)taching Controllers
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
Centralize device modification in the more flexible APIs, to allow future
honoring of additional flags. Explicitly reject the
VIR_DOMAIN_DEVICE_MODIFY_FORCE flag on attach/detach.
Based on Eric Blake<eblake@redhat.com>'s work.
* src/qemu/qemu_driver.c
(qemudDomainAttachDevice)(qemudDomainAttachDeviceFlags): Swap bodies,rename...
(qemudDomainDetachDevice, qemudDomainDetachDeviceFlags): Likewise.
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
Up to now we missed parser for cpuinfo on x390(x) machines. Those machines
have only 1 thread, core, socket. What is missing is information about
CPU frequency.
The two ends of the pipe used for feeding QEMU tunnelled
migration data were interchanged, so QEMU got given the
"write" end instead of the "read" end.
The qemuMigrationPrepareTunnel method was also immediately
closing the "write" end of the pipe, so the stream failed
to actually write anything.
* src/qemu/qemu_migration.c: Swap tunnelled migration
pipe FDs & don't close pipe given to stream
Here is a new version of this patch:
https://www.redhat.com/archives/libvir-list/2011-April/msg00337.html
v2:
- store the cputune info for the whole runtime of the domain
- remove cputune info when domain is destroyed
The nodeGetInfo code had to be moved into a helper
function to reuse it without a virConnectPtr.
Rather than copying and pasting lots of code, factor it into a
single helper function.
This commit adds a warning if tighter integer parsing would fail
due to any stray bytes after the number, but should not change
any behavior other than the bug fix for phypNumDomainsGeneric
looking only at numeric lines.
* src/phyp/phyp_driver.c (phypExecInt): New function.
(phypGetVIOSPartitionID, phypNumDomainsGeneric, phypGetLparID)
(phypGetLparMem, phypGetLparCPUGeneric, phypGetRemoteSlot)
(phypGetVIOSNextSlotNumber, phypAttachDevice)
(phypGetStoragePoolSize, phypStoragePoolNumOfVolumes)
(phypNumOfStoragePools, phypInterfaceDestroy)
(phypInterfaceDefineXML, phypInterfaceLookupByName)
(phypInterfaceIsActive, phypNumOfInterfaces): Use it.
(phypNumDomainsGeneric): Correctly find numeric line.
This last minute addition caused a build failure
cc1: warnings being treated as errors
qemu/qemu_process.c: In function 'qemuProcessHandleWatchdog':
qemu/qemu_process.c:436:34: error: ignoring return value of 'virDomainObjUnref', declared with attribute warn_unused_result [-Wunused-result]
make[3]: *** [libvirt_driver_qemu_la-qemu_process.lo] Error 1
This patch does the following two things:
1. hold an extra reference while handling watchdog event
If the domain is not persistent, and qemu quits unexpectedly before
calling processWatchdogEvent(), vm will be freed and the function
processWatchdogEvent() will be dangerous.
2. unlock qemu driver and vm before returning from processWatchdogEvent()
When the function processWatchdogEvent() failed, we only free wdEvent,
but forget to unlock qemu driver and vm, free dumpfile.
We do not lock qemu_driver when calling virThreadPoolNew(). If it failed,
we will unlock qemu_driver. It is dangerous.
We may use this pool during auto starting domains. So we must create it before
calling qemuAutostartDomains(). Otherwise, libvirtd will crash.
Also mark error messages in block_stats.c for translation, add the
new macro to the msg_gen functions in cfg.mk and add block_stats.c
to po/POTFILES.in
commit d4601696 introduces two more generated files: esx_vi.generated.h
and esx_vi.generated.h. But we do not include them into dist file.
It will break building if using dist file to build.
Use the name 'ret' for all phypExec results, to make it easier
to wrap phypExec. Don't allow a possibly NULL ret through printf.
* src/phyp/phyp_driver.c (phypBuildVolume, phypDestroyStoragePool)
(phypBuildStoragePool, phypBuildLpar): Avoid NULL dereference.
(phypInterfaceDestroy): Avoid redundant free.
(phypVolumeLookupByPath, phypVolumeGetPath): Use consistent
naming.
Ever since commit ebc46f, the destroy function built two command
variants but only used one. I went with the variant that matches
the idiom used in the counterpart of phypBuildStoragePool.
* src/phyp/phyp_driver.c (phypDestroyStoragePool): Avoid
clobbering cmd. Fix error message typo.
This warnings come from partly generated code. Therefore, the best
solution is to mark them as potentially being unused using the
ATTRIBUTE_UNUSED macro. This is suggested by the gcc documentation.
Reported by Christophe Fergeau
This patch addresses:
https://bugzilla.redhat.com/show_bug.cgi?id=694382
In order to give each libvirt-created bridge a fixed MAC address,
commit 5754dbd56d, added code to create
a dummy tap device with guaranteed lowest MAC address and attach it to
the bridge. This tap device was given the name "${bridgename}-nic".
However, an interface device name must be IFNAMSIZ (15) characters or
less, so a valid ${bridgename} such as "verylongname123" (15
characters) would lead to an invalid tap device name
("verylongname123-nic" - 19 characters), and that in turn led to a
failure to bring up the network.
The solution is to shorten the part of the original name used to
generate the tap device name. However, simply truncating it is
insufficient, because the last few characters of an interface name are
often a number used to indicate one of a list of several similar
devices (for example, "verylongname123", "verylongname124", etc) and
simple truncation would lead to duplicate names (eg "verlongnam-nic"
and "verylongnam-nic"). So instead we take the first 8 characters of
$bridgename ("verylong" in the example), add on the final 3 bytes
("123"), then add "-nic" (so "verylong123-nic"). Not pretty, but it
is much more likely to generate a unique name, and is reproducible
(unlike, say, a random number).
Due to differences in /proc/cpuinfo the parsing of the cpu data is
different between architectures. On PPC /proc/cpuinfo looks like this:
[original formatting with tabs]
processor : 0
cpu : PPC970MP, altivec supported
clock : 2297.700000MHz
revision : 1.1 (pvr 0044 0101)
processor : 1
cpu : PPC970MP, altivec supported
clock : 2297.700000MHz
revision : 1.1 (pvr 0044 0101)
[..]
timebase : 14318000
platform : pSeries
model : IBM,8844-AC1
machine : CHRP IBM,8844-AC1
The patch adapts the parsing of the data found in /proc/cpuinfo.
/sys/devices/system/cpu/cpuX/topology/physical_package_id also
always returns -1. Check for it on ppc and make it '0' if found negative.
This patch enables the migration of Qemu VMs between hosts of different endianess. I tested this by migrating a i686 VM between a x86 and ppc64 host.
I am converting the 'int's in the VM's state header to uint32_t assuming this doesn't break compatibility with existing deployments other than Linux.
gcc 4.6 warns when a variable is initialized but isn't used afterwards:
vmware/vmware_driver.c:449:18: warning: variable 'vmxPath' set but not used [-Wunused-but-set-variable]
This patch fixes these warnings. There are still 2 offending files:
- vbox_tmpl.c: the variable is used inside an #ifdef and is assigned several
times outside of #ifdef. Fixing the warning would have required wrapping
all the assignment inside #ifdef which hurts readability.
vbox/vbox_tmpl.c: In function 'vboxAttachDrives':
vbox/vbox_tmpl.c:3918:22: warning: variable 'accessMode' set but not used [-Wunused-but-set-variable]
- esx_vi_types.generated.c: the name implies it's generated code and I
didn't want to dive into the code generator
esx/esx_vi_types.generated.c: In function 'esxVI_FileQueryFlags_Free':
esx/esx_vi_types.generated.c:1203:3: warning: variable 'item' set but not used [-Wunused-but-set-variable]
Make: passed
Make check: passed
Make syntax-check: passed
this is the commit to introduce the function to create new character
device definition for the domain as advised by Cole Robinson
<crobinso@redhat.com>.
The function is used on the relevant places and also new tests has
been added.
Signed-off-by: Michal Novotny <minovotn@redhat.com>
This extends the SPICE XML to allow variable compression settings for audio,
images and streaming:
<graphics type='spice' port='5901' tlsPort='-1' autoport='yes'>
<image compression='auto_glz'/>
<jpeg compression='auto'/>
<zlib compression='auto'/>
<playback compression='on'/>
</graphics>
All new elements are optional.
This fixes: https://bugzilla.redhat.com/show_bug.cgi?id=696660
While starting a network, if brSetForwardDelay() fails, we go to err1
where we want to access macTapIfName variable which was just
VIR_FREE'd a few lines above. Instead, keep macTapIfName until we are
certain of success.
The methods qemuDomain{Get,Set}{Memory,Blkio,Scheduler}Parameters
all forgot to do a check on virDomainIsActive(), resulting in bogus
error messages from later parts of their impl
* src/qemu/qemu_driver.c: Add missing checks on virDomainIsActive()
sizeof(domain->name) is the wrong thing. Instead of using strdup here
rewrite escape_specialcharacters to allocate the buffer itself.
Add a contains_specialcharacters to be used in phypOpen, as phypOpen is
not interested in the escaped version.
