Commit Graph

24859 Commits

Author SHA1 Message Date
Peter Krempa
15398e6a4c log: Fix loading of conf file for log daemon
'log_outputs' would be read into the variable for log_filters
2016-12-14 07:24:24 +01:00
Peter Krempa
e98b30909b lock: Fix loading of config file for the lock daemon
'log_outputs' would be read into the variable for log_filters
2016-12-14 07:24:24 +01:00
Viktor Mihajlovski
283e290434 qemu: Allow use of hot plugged host CPUs if no affinity set
If the cpuset cgroup controller is disabled in /etc/libvirt/qemu.conf
QEMU virtual machines can in principle use all host CPUs, even if they
are hot plugged, if they have no explicit CPU affinity defined.

However, there's libvirt code supposed to handle the situation where
the libvirt daemon itself is not using all host CPUs. The code in
qemuProcessInitCpuAffinity attempts to set an affinity mask including
all defined host CPUs. Unfortunately, the resulting affinity mask for
the process will not contain the offline CPUs. See also the
sched_setaffinity(2) man page.

That means that even if the host CPUs come online again, they won't be
used by the QEMU process anymore. The same is true for newly hot
plugged CPUs. So we are effectively preventing that QEMU uses all
processors instead of enabling it to use them.

It only makes sense to set the QEMU process affinity if we're able
to actually grow the set of usable CPUs, i.e. if the process affinity
is a subset of the online host CPUs.

There's still the chance that for some reason the deliberately chosen
libvirtd affinity matches the online host CPU mask by accident. In this
case the behavior remains as it was before (CPUs offline while setting
the affinity will not be used if they show up later on).

Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
Tested-by: Matthew Rosato <mjrosato@linux.vnet.ibm.com>
2016-12-13 18:25:00 -05:00
Viktor Mihajlovski
1be35910f7 util: Allow to query the presence of host CPU bitmaps
The functions to retrieve online and present host CPU information
are only supported on Linux for the time being.

This leads to runtime errors if these function are used on other
platforms. To avoid that, code in higher levels using the functions
must replicate the conditional compilation in higher level which
is error prone (and is plainly spoken ugly).

Adding a function virHostCPUHasBitmap that can be used to check
for host CPU bitmap support.

NB: There are other functions including the host CPU count that
are lacking support on all platforms, but they are too essential
in order to be bypassed.

Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
2016-12-13 18:12:09 -05:00
Jiri Denemark
f00c00475f qemu: Fix virQEMUCapsFindTarget on ppc64le
virQEMUCapsFindTarget is supposed to find an alternative QEMU binary if
qemu-system-$GUEST_ARCH doesn't exist. The alternative is using host
architecture when it is compatible with $GUEST_ARCH. But a special
treatment has to be applied for ppc64le since the QEMU binary is always
called qemu-system-ppc64.

Broken by me in v2.2.0-171-gf2e71550d.

https://bugzilla.redhat.com/show_bug.cgi?id=1403745

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
2016-12-13 22:11:33 +01:00
John Ferlan
7ed89d7421 docs: Update formatstorage to match code for pool path
Seems commit id '0257d06b' forgot to include formatstorage when updating
the docs to describe allowing zfs as a pool type and to furthermore note
that the pool's target path element will be generated rather than read.

Similarly commit id 'efab27afb' neglected to indicate that the target path
for a logical pool will now be generated by libvirt.

Signed-off-by: John Ferlan <jferlan@redhat.com>
2016-12-13 15:17:10 -05:00
Jiri Denemark
6408f422a5 formatnetwork: Cleanup /network/ip documentation
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
2016-12-13 09:47:42 +01:00
Jiri Denemark
df80cdf297 formatnetwork: Properly mark attributes of /network/dns/srv
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
2016-12-13 09:42:34 +01:00
Jiri Denemark
c89313e071 formatnetwork: Remove extra white space in examples
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
2016-12-13 09:42:34 +01:00
Jiri Denemark
0e24492341 formatnetwork: Split long lines
Let's make sure all examples fit into their grey boxes.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
2016-12-13 09:42:34 +01:00
Jiri Denemark
ad8084da0d formatnetwork: Remove useless </route>
Almost all XML examples use <tag .../> rather than <tag ...></tag> if
the element is empty. Let's remove the two instances of the latter.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
2016-12-13 09:42:34 +01:00
Nitesh Konkar
8981d7925e perf: add branch_misses perf event support
This patch adds support and documentation
for the branch_misses perf event.

Signed-off-by: Nitesh Konkar <nitkon12@linux.vnet.ibm.com>
2016-12-12 18:04:52 -05:00
Nikolay Shirokovskiy
cdd6819318 qemu: agent: take monitor lock in qemuAgentNotifyEvent
qemuAgentNotifyEvent accesses monitor structure and is called on qemu
reset/shutdown/suspend events under domain lock. Other monitor
functions on the other hand take monitor lock and don't hold domain lock.
Thus it is possible to have risky simultaneous access to the structure
from 2 threads. Let's take monitor lock here to make access exclusive.
2016-12-12 17:14:11 -05:00
Nikolay Shirokovskiy
c9a191fc48 qemu: don't use vm when lock is dropped in qemuDomainGetFSInfo
Current call to qemuAgentGetFSInfo in qemuDomainGetFSInfo is
unsafe. Domain lock is dropped and we use vm->def. Let's make
def copy to fix that.
2016-12-12 17:14:11 -05:00
Nikolay Shirokovskiy
3ab9652a86 qemu: agent: fix uninitialized var case in qemuAgentGetFSInfo
In case of 0 filesystems *info is not set while according
to virDomainGetFSInfo contract user should call free on it even
in case of 0 filesystems. Thus we need to properly set
it. NULL will be enough as free eats NULLs ok.
2016-12-12 17:14:11 -05:00
John Ferlan
d2c1222627 news: Add news entry for qemuDomainGetBlockInfo adjustments 2016-12-12 16:04:17 -05:00
John Ferlan
cf436a560d qemu: Fix GetBlockInfo setting allocation from wr_highest_offset
The libvirt-domain.h documentation indicates that for a qcow2 file
in a filesystem being used for a backing store should report the disk
space occupied by a file; however, commit id '15fa84ac' altered the
code to trust that the wr_highest_offset should be used whenever
wr_highest_offset_valid was set.

As it turns out this will lead to indeterminite results. For an active
domain when qemu hasn't yet had the need to find the wr_highest_offset
value, qemu will report 0 even though qemu-img will report the proper
disk size. This causes reporting of the following XML:

  <disk type='file' device='disk'>
    <driver name='qemu' type='qcow2'/>
    <source file='/path/to/test-1g.qcow2'/>

to be as follows:

Capacity:       1073741824
Allocation:     0
Physical:       1074139136

with qemu-img indicating:

image: /path/to/test-1g.qcow2
file format: qcow2
virtual size: 1.0G (1073741824 bytes)
disk size: 1.0G

Once the backing source file is opened on the guest, then wr_highest_offset
is updated, but only to the high water mark and not the size of the file.

This patch will adjust the logic to check for the file backed qcow2 image
and enforce setting the allocation to the returned 'physical' value, which
is the 'actual-size' value from a 'query-block' operation.

NB: The other consumer of the wr_highest_offset output (GetAllDomainStats)
has a contract that indicates 'allocation' is the offset of the highest
written sector, so it doesn't need adjustment.

Signed-off-by: John Ferlan <jferlan@redhat.com>
2016-12-12 16:04:17 -05:00
John Ferlan
9d734b60a7 util: Introduce virStorageSourceUpdateCapacity
Instead of having duplicated code in qemuStorageLimitsRefresh and
virStorageBackendUpdateVolTargetInfo to get capacity specific data
about the storage backing source or volume -- create a common API
to handle the details for both.

As a side effect, virStorageFileProbeFormatFromBuf returns to being
a local/static helper to virstoragefile.c

For the QEMU code - if the probe is done, then the format is saved so
as to avoid future such probes.

For the storage backend code, there is no need to deal with the probe
since we cannot call the new API if target->format == NONE.

Signed-off-by: John Ferlan <jferlan@redhat.com>
2016-12-12 16:04:17 -05:00
John Ferlan
3039ec962e util: Introduce virStorageSourceUpdateBackingSizes
Instead of having duplicated code in qemuStorageLimitsRefresh and
virStorageBackendUpdateVolTargetInfoFD to fill in the storage backing
source or volume allocation, capacity, and physical values - create a
common API that will handle the details for both.

The common API will fill in "default" capacity values as well - although
those more than likely will be overridden by subsequent code. Having just
one place to make the determination of what the values should be will
make things be more consistent.

For the QEMU code - the data filled in will be for inactive domains
for the GetBlockInfo and DomainGetStatsOneBlock API's. For the storage
backend code - the data will be filled in during the volume updates.

Signed-off-by: John Ferlan <jferlan@redhat.com>
2016-12-12 16:04:17 -05:00
John Ferlan
c5f6151390 util: Introduce virStorageSourceUpdatePhysicalSize
Commit id '8dc27259' introduced virStorageSourceUpdateBlockPhysicalSize
in order to retrieve the physical size for a block backed source device
for an active domain since commit id '15fa84ac' changed to use the
qemuMonitorGetAllBlockStatsInfo and qemuMonitorBlockStatsUpdateCapacity
API's to (essentially) retrieve the "actual-size" from a 'query-block'
operation for the source device.

However, the code only was made functional for a BLOCK backing type
and it neglected to use qemuOpenFile, instead using just open. After
the open the block lseek would find the end of the block and set the
physical value, close the fd and return.

Since the code would return 0 immediately if the source device wasn't
a BLOCK backed device, the physical would be displayed incorrectly,
such as follows in domblkinfo for a file backed source device:

Capacity:       1073741824
Allocation:     0
Physical:       0

This patch will modify the algorithm to get the physical size for other
backing types and it will make use of the qemuDomainStorageOpenStat
helper in order to open/stat the source file depending on its type.
The qemuDomainGetStatsOneBlock will no longer inhibit printing errors,
but it will still ignore them leaving the physical value set to 0.

Signed-off-by: John Ferlan <jferlan@redhat.com>
2016-12-12 16:04:17 -05:00
John Ferlan
a7fea19fcd qemu: Introduce helper qemuDomainStorageUpdatePhysical
Currently just a shim to call virStorageSourceUpdateBlockPhysicalSize

Signed-off-by: John Ferlan <jferlan@redhat.com>
2016-12-12 16:04:17 -05:00
John Ferlan
732af77cce qemu: Add helpers to handle stat data for qemuStorageLimitsRefresh
Split out the opening of the file and fetch of the stat buffer into a
helper qemuDomainStorageOpenStat. This will handle either opening the
local or remote storage.

Additionally split out the cleanup of that into a separate helper
qemuDomainStorageCloseStat which will either close the file or
call the virStorageFileDeinit function.

Signed-off-by: John Ferlan <jferlan@redhat.com>
2016-12-12 16:04:17 -05:00
John Ferlan
7149d1693d qemu: Clean up description for qemuStorageLimitsRefresh
Originally added by commit id '89646e69' prior to commit id '15fa84ac'
and '71d2c172' which ensured that qemuStorageLimitsRefresh was only called
for inactive domains.

Adjust the comment describing the need for FIXME and move all the text
to the function description.

Signed-off-by: John Ferlan <jferlan@redhat.com>
2016-12-12 16:04:17 -05:00
intrigeri
a73e7037e5 AppArmor: allow QEMU to set_process_name.
https://bugzilla.redhat.com/show_bug.cgi?id=1369281

Acked-by: Christian Ehrhardt <christian.ehrhardt@canonical.co>
2016-12-12 14:08:45 +00:00
intrigeri
de79efdeb8 AppArmor policy: support merged-/usr.
Acked-by: Christian Ehrhardt <christian.ehrhardt@canonical.co>
2016-12-12 14:08:35 +00:00
John Ferlan
e36a0e0cde docs: Adjust pool/vol target output
Looks like the <timestamps> and <encryption> were put in the wrong
place... They're not <pool> elements, rather they are <volume> elements
2016-12-11 08:07:41 -05:00
John Ferlan
f17d68067e docs: Replace missing description for perf.cpu_cycles
Lost during merge of commit id '8546adf80' and '585ad00b5'
2016-12-11 07:56:53 -05:00
Peter Krempa
bd4ae4f5e8 virsh: maxvcpus: Always fall back to the old command if domain caps fail
1ec22be5 added code that detects the maximum cpu count according to
domain capabilities. The code fell back to the old command only if the
API was not supported. If the API fails for other reasons the command
would fail. There's no point in not trying the old API in such case.

https://bugzilla.redhat.com/show_bug.cgi?id=1402690
2016-12-09 15:57:16 +01:00
Pavel Glushchak
b1f916abbc vz: added VIR_MIGRATE_NON_SHARED_INC migration flag support
This flag is used in Virtuozzo backend implicitly, thus
we need to support it and don't fail if it's set.

Signed-off-by: Pavel Glushchak <pglushchak@virtuozzo.com>
2016-12-09 17:21:53 +03:00
Pavel Glushchak
5bafa1d721 vz: set PVMT_DONT_CREATE_DISK migration flag
This flag tells backend not to create instance
disks making behavior the same as in qemu driver.
Disk files have to be created beforehand on target
host manually or by upper management layer i.e.
OpenStack Nova.

Signed-off-by: Pavel Glushchak <pglushchak@virtuozzo.com>
2016-12-09 17:21:43 +03:00
Nikolay Shirokovskiy
61a0026a94 qemu: Fix xml dump of autogenerated websocket
When save/migrate a domain and we autogenerated a port, then if we
print the inactive domain config, write out a -1 for the socket value;
otherwise, it's possible that the subsequent start will fail if the
autogenerated websocket used conflicts with an existing running config
that also used autogenerated websockets.

Examples:

== A. Can not restore domain with autoconfigured websocket.

domain 1 and 2 have autoconfigured websocket.

1. domain 1 is started then, saved
2. domain 2 is started
3. domain 1 restoration is failed:

error: internal error: qemu unexpectedly closed the monitor: 2016-11-21T10:23:11.356687Z
qemu-kvm: -vnc 0.0.0.0:2,websocket=5700: Failed to start VNC server on `(null)':
Failed to bind socket: Address already in use

== B. Can not migrate domain with autoconfigured websocket.

domain 1 on host A, domain 2 on host B, both have autoconfigured websocket

1. domain 1 started, domain 2 started
2. domain 1 migration to host B is failed with the above error.
2016-12-09 07:54:39 -05:00
Nikolay Shirokovskiy
1215965a4c qemu: mark user defined websocket as used
We need extra state variable to distinguish between autogenerated
and user defined cases after auto generation is done.
2016-12-09 07:54:34 -05:00
Nikolay Shirokovskiy
b07cfd724f qemu: Refactor qemuProcessGraphicsReservePorts
Use switch for enums rather than if/else conditions.
2016-12-09 07:40:46 -05:00
Michal Privoznik
db34168a7f vsh: Mark some function arguments as unused
Some arguments in vshErrorHandler, vshReadlineCompletion and
cmdSelfTest functions are not used. Mark them as such.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2016-12-09 10:52:29 +01:00
Michal Privoznik
b492f7ef0f qemuGetDomainHugepagePath: Initialize @ret
The variable may be used uninitialized in this function.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2016-12-09 10:51:37 +01:00
Mehdi Abaakouk
e0d893e86d Move virstat.c code to virnetdevtap.c
This is just a code move of virstat.c to virnetdevtap.c
2016-12-09 10:28:07 +01:00
Mehdi Abaakouk
9b6de7c506 virstat: fix signature of virstat helper
In preparation to the code move to virnetdevtap.c, this change:

* renames virNetInterfaceStats to virNetDevTapInterfaceStats
* changes 'path' to 'ifname', to use the same vocable as other
  method in virnetdevtap.c.
* Add the attributes checker
2016-12-09 10:27:56 +01:00
Mehdi Abaakouk
013df874db Gathering vhostuser interface stats with ovs
When vhostuser interfaces are used, the interface statistics
are not available in /proc/net/dev.

This change looks at the openvswitch interfaces statistics
tables to provide this information for vhostuser interface.

Note that in openvswitch world drop/error doesn't always make sense
for some interface type. When these informations are not available we
set them to 0 on the virDomainInterfaceStats.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2016-12-09 10:23:09 +01:00
John Ferlan
03876cf506 nss: Need to check error condition on virJSONValueArraySize
If the 'nleases < 0' on return, then the subsequent call to
findLeaseInJSON will not produce the expected results (passed
in as a size_t, but nleases is a ssize_t).  So check if the
returned value < 0 and if so, goto cleanup.

Found by Coverity as a NEGATIVE_RETURNS event
2016-12-08 14:58:31 -05:00
John Ferlan
80acf4b867 tests: Fix virmacmaptest when allocation fails
If the allocation fails in DO_TEST_FLUSH_PROLOGUE, then 'mgr == NULL',
but the code continues on - which won't be good. So modify the macro
to cause an immediate failure and jump to a cleanup label.

Found by Coverity as FORWARD_NULL event.
2016-12-08 14:58:31 -05:00
John Ferlan
0658184944 news: Add description for perf.branch_instructions 2016-12-08 14:28:58 -05:00
Peter Krempa
a4ed5b4212 qemu: Don't try to find compression program for "raw" memory images
There's nothing to compress if the requested snapshot memory format is
set to 'raw' explicitly. After commit 9e14689ea libvirt would try to
run /sbin/raw to process the memory stream if the qemu.conf option
snapshot_image_format is set.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1402726
2016-12-08 17:12:54 +01:00
Cédric Bosdonnat
3cd556d486 lxc: monitor now holds a reference to the domain
If the monitor doesn't hold a reference to the domain object
the object may be destroyed before the monitor actually stops.
2016-12-08 16:35:53 +01:00
Michal Privoznik
ce937d3710 security: Drop virSecurityManagerSetHugepages
Since its introduction in 2012 this internal API did nothing.
Moreover we have the same API that does exactly the same:
virSecurityManagerDomainSetPathLabel.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2016-12-08 15:45:52 +01:00
Michal Privoznik
f55afd83b1 qemu: Create hugepage path on per domain basis
If you've ever tried running a huge page backed guest under
different user than in qemu.conf, you probably failed. Problem is
even though we have corresponding APIs in the security drivers,
there's no implementation and thus we don't relabel the huge page
path. But even if we did, so far all of the domains share the
same path:

   /hugepageMount/libvirt/qemu

Our only option there would be to set 0777 mode on the qemu dir
which is totally unsafe. Therefore, we can create dir on
per-domain basis, i.e.:

   /hugepageMount/libvirt/qemu/domainName

and chown domainName dir to the user that domain is configured to
run under.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2016-12-08 15:45:52 +01:00
Michal Privoznik
7ed6934f3b virDomainObjGetShortName: take virDomainDef
So far this function takes virDomainObjPtr which:
1) is an overkill,
2) might be not available in all the places we will use it.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2016-12-08 15:45:52 +01:00
Martin Kletzander
dc18766b10 conf: Make scheduler formatting simpler
Since the great rework of how we store vcpu- and iothread-related
data, we have overly complex part of code that is trying to format the
scheduler tuning data in as less lines as possible by grouping
settings for multiple threads.  That was designed as an input syntax
sugar for users, but we don't need to also use that when formatting
the XML.  Switching to simple enumeration makes the code nicer,
shorter and more welcoming to future changes.

Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
2016-12-08 15:27:52 +01:00
Michal Privoznik
b64af8f81d libvirt.spec: Package libnss_libvirt_guest.so.2
In 22f7ceb695 I've introduced another NSS module
but forgot to package it in libvirt-nss.rpm.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2016-12-08 15:25:17 +01:00
Daniel P. Berrange
0be9cea199 test: fix screenshot API impl
When redoing the website we deleted the libvirtLogo.png file
not remembering that the test driver screenshot API impl
relied on it.

Rather than having the test driver use the logo as a side
effect, give it its own dedicated image to use. This is
installed in /usr/share/libvirt/test-screenshot.png and
is taken from a NeXT Cube running WorldWideWeb[1]. The
very first web browser in existance, running on the
hardware it was originally written on.

[1] https://en.wikipedia.org/wiki/WorldWideWeb

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2016-12-08 10:57:32 +00:00
Pavel Hrdina
4ec981d9c2 configure: sort libvirt macros
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
2016-12-07 16:21:32 +01:00