In cases when the hash function for a name collides with other entry
already in the hash we prepend to the bucket. This creates a 'stack
effect' on the buckets if we then iterate through the hash. Normally
this is not a problem, but in tests we want deterministic results.

Since it does not matter where we add the entry and it's usually more
probable that a different entry will be accessed next change it to
append to the end of the bucket. Luckily we already iterate throught the
bucket once thus we can easily find the last entry and just connect the
new entry after it.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>

virCgroup struct is always defined and the free function is not calling
anything that would require OS supporting cgroups.

This fixes an issue if we try to start a VM with QEMU binary that
doesn't support QXL.  The start operation will fail in
qemuProcessStartValidateVideo() which will set correct error message,
but later in one of the cleanup paths we will call
qemuDomainObjPrivateDataClear() which always calls virCgroupFree()
and that will fail on OS that doesn't support cgroups and it will
set a new error which will be eventually reported to user.
Signed-off-by: NPavel Hrdina <phrdina@redhat.com>

If a bitmap of a shorter length than the data buffer is passed to
virBitmapToDataBuf, it will read off the end of the bitmap and copy junk
into the returned buffer. Add a check to only copy the length of the
bitmap to the buffer.

The problem can be observed after setting a vcpu affinity using the vcpupin
command on a system with a large number of cores:
  # virsh vcpupin example_domain 0 0
  # virsh vcpupin example_domain 0
     VCPU   CPU Affinity
    ---------------------------
     0      0,192,197-198,202
Signed-off-by: NJohn Allen <john.allen@amd.com>

Reviewed-by: NLaine Stump <laine@laine.org>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

Reviewed-by: NCole Robinson <crobinso@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

hostdevs have a link back to the original network device. This is fairly
generic accepting any type of device, however, we don't intend to make
use of this approach in future. It can thus be specialized to network
devices.
Reviewed-by: NCole Robinson <crobinso@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

When virDBusMessageRead() and virDBusMessageDecode were first added in
commit 834c9c94, they were identical except that virDBusMessageRead()
would unref the message after decoding it.

This difference was eliminated later in commit dc7f3ffc after it
became apparent that unref-ing the message so soon was never the right
thing to do. The two identical functions remained though, with the
tests and virDBus library itself calling the Decode variant, and all
other users calling the Read variant.

This patch eliminates the duplication, switching all users to
virDBusMessageDecode (and moving the nice API documentation comment
from the Read function up to the Decode function).
Signed-off-by: NLaine Stump <laine@laine.org>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>

Spotted by Lintian (manpage-has-bad-whatis-entry tag).
Signed-off-by: NAndrea Bolognani <abologna@redhat.com>
Reviewed-by: NMartin Kletzander <mkletzan@redhat.com>

Model specific registers are a thing only on x86. Also, the
/dev/cpu/0/msr path exists only on Linux and the fallback
mechanism (asking KVM) exists on Linux and FreeBSD only.

Therefore, move the function within #ifdef that checks all
aforementioned constraints and provide a dummy stub for all
other cases.

This fixes the build on my arm box, mingw-* builds, etc.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJiri Denemark <jdenemar@redhat.com>

Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJiri Denemark <jdenemar@redhat.com>

The new virHostCPUGetMSR internal API will try to read the MSR from
/dev/cpu/0/msr and if it is not possible (the device does not exist or
libvirt is running unprivileged), it will fallback to asking KVM for the
MSR using KVM_GET_MSRS ioctl.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Vim has trouble figuring out the filetype automatically because
the name doesn't follow existing conventions; annotations like
the ones we already have in Makefile.ci help it out.
Signed-off-by: NAndrea Bolognani <abologna@redhat.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>

Firstly, virCommandRun() does report an error on failure (which
in most cases is more accurate than what we overwrite it with).
Secondly, usually errno is not set (or gets overwritten in the
cleanup code) which makes virReportSystemError() report useless
error messages. Drop all virReportSystemError() calls in cases
like this (I've found three occurrences).
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>

The 'bandwidths' variable is allocated using VIR_RESIZE_N so it has to
be freed as well.

==118315== 8 bytes in 1 blocks are definitely lost in loss record 299 of 2,401
==118315==    at 0x4C29DAD: malloc (vg_replace_malloc.c:308)
==118315==    by 0x4C2C100: realloc (vg_replace_malloc.c:836)
==118315==    by 0x52C3FAF: virReallocN (viralloc.c:245)
==118315==    by 0x52C4079: virExpandN (viralloc.c:294)
==118315==    by 0x532BBA8: virResctrlAllocParseProcessMemoryBandwidth (virresctrl.c:1156)
==118315==    by 0x532BBA8: virResctrlAllocParseMemoryBandwidthLine (virresctrl.c:1211)
==118315==    by 0x532BBA8: virResctrlAllocParse (virresctrl.c:1414)
==118315==    by 0x532BBA8: virResctrlAllocGetGroup (virresctrl.c:1446)
==118315==    by 0x532C11D: virResctrlAllocGetDefault (virresctrl.c:1464)
==118315==    by 0x532D15E: virResctrlAllocAssign (virresctrl.c:1923)
==118315==    by 0x532D15E: virResctrlAllocCreate (virresctrl.c:2042)
==118315==    by 0x31E1ABEE: qemuProcessResctrlCreate (qemu_process.c:2596)
==118315==    by 0x31E1ABEE: qemuProcessLaunch (qemu_process.c:6444)
==118315==    by 0x31E1E341: qemuProcessStart (qemu_process.c:6721)
==118315==    by 0x31E81315: qemuDomainObjStart.constprop.50 (qemu_driver.c:7288)
==118315==    by 0x31E81A65: qemuDomainCreateWithFlags (qemu_driver.c:7341)
==118315==    by 0x54DDB4B: virDomainCreate (libvirt-domain.c:6534)
Signed-off-by: NPavel Hrdina <phrdina@redhat.com>

Standardize on putting the _LAST enum value on the second line
of VIR_ENUM_IMPL invocations. Later patches that add string labels
to VIR_ENUM_IMPL will push most of these to the second line anyways,
so this saves some noise.
Signed-off-by: NCole Robinson <crobinso@redhat.com>

The function open-codes addition into an array. Use the helper instead.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

This reverts commit a5e16020.

Getting rid of unistd.h from our headers will require more work than
just fixing the broken mingw build. Revert it until I have a more
complete proposal.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>

util/virutil.h bogously included unistd.h. Drop it and replace it by
including it directly where needed.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

virutil.(c|h) is a very gross collection of random code. Remove the enum
handlers from there so we can limit the scope where virtutil.h is used.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

'viralloc.h' does not provide any type or macro which would be necessary
in headers. Prevent leakage of the inclusion.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Keeping them with viralloc.h forcibly pulls in the other stuff from
viralloc.h into other header files. This in turn creates a mess
as more and more headers pull in the 'viral' header file.

If we want to make 'viralloc.h' omnipresent we should pick a different
approach.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

This commit fixes an unitialized variable to avoid garbage value
when virNetDevBridgeGet method returns error. When, that method fails
before initialize 'val' variable, it can cause problems related to
that.
Signed-off-by: NJulio Faracco <jcfaracco@gmail.com>
Reviewed-by: NErik Skultety <eskultet@redhat.com>

This helper has solely to do with virObjects. Move it together with
other virObject stuff.

This also avoids the potential problem where VIR_AUTOUNREF uses
virObjectAutoUnref which is defined in virobject.h.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Acked-by: NEric Blake <eblake@redhat.com>
Signed-off-by: NCole Robinson <crobinso@redhat.com>

We have more modern replacements.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Unused since 3c269b51Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

This helper returns the default hugetlbfs mount point from given
array of mount points.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

Since commit 66460e32 dropped support for YAJL 1, we no longer need
these.
Signed-off-by: NJán Tomko <jtomko@redhat.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Acked-by: NPeter Krempa <pkrempa@redhat.com>

Now that we do not need to cater to YAJL 1, move the check for the
return value of yajl_gen_alloc earlier, so that we can assume it
was successful in later code.
Signed-off-by: NJán Tomko <jtomko@redhat.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>

Now that we require YAJL2, drop the code dealing with YAJL 1.
Signed-off-by: NJán Tomko <jtomko@redhat.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>

Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NLaine Stump <laine@laine.org>

We have tests that validate the XML formatter. Additionally almost every
guide tells users to disable JSON logging. Drop logging of output string
in virJSONValueToString.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NLaine Stump <laine@laine.org>

The last step of the conversion involves copying of the generated JSON
into a separate string. We can use a virBuffer to do this as this will
also allow to subsequently use the buffer when we actually need to do
some other formatting of the string.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NLaine Stump <laine@laine.org>

Use size_t for all sizes. The '*' modifier unfortunately does require an
int so a temporary variable is necessary in the tests.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NLaine Stump <laine@laine.org>

This was meant to stop abusing the members directly, but we don't do
this for other internal structs. Additionally this did not stop the
test from touching the members. Remove the header obscurization.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NLaine Stump <laine@laine.org>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

VIR_AUTODISPOSE_STR is similar to VIR_AUTOFREE(char *) but uses
virDispose for clearing of the stored string.

This patch also refactors VIR_DISPOSE to use the new helper which is
used for the new macro.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

commit edaf1356 modified the stats retrieval for OVS interfaces to
not fail when one of the fields was unrecognized by the ovs-vsctl
command, but ovs-vsctl was still returning an error, and libvirt was
cluttering the logs with these inconsequential error messages.

This patch modifies the GET_STAT macro to add "--if-exists" to the
ovs-vsctl command, which causes it to return an empty string (and exit
with success) if the requested statistic isn't in its database, thus
eliminating the ugly error messages from the log.

Resolves: https://bugzilla.redhat.com/1683175Signed-off-by: NLaine Stump <laine@laine.org>

Prepare for introducing a bunch of new public APIs related to
backup checkpoints by first introducing a new internal type
and errors associated with that type.  Checkpoints are modeled
heavily after virDomainSnapshotPtr (both represent a point in
time of the guest), although a snapshot exists with the intent
of rolling back to that state, while a checkpoint exists to
make it possible to create an incremental backup at a later
time.
Signed-off-by: NEric Blake <eblake@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>

We can use our VIR_AUTOPTR machinery also for libxml2's xmlDoc and
xmlXPathContext.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>