Improve readability and reduce complexity the method
parseTypeComment().
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Signed-off-by: NRadostin Stoyanov <rstoyanov1@gmail.com>

The method strip_lead_star() removes a single leading asterisk
character from a string by ignoring leading whitespace, otherwise it
returns the original string.

This could be achieved with a single if-statement followed by replace.
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Signed-off-by: NRadostin Stoyanov <rstoyanov1@gmail.com>

PEP8 recommends that the number of spaces used for indentation of
Python code to be a multiple of four [1] [2].

1: https://lintlyci.github.io/Flake8Rules/rules/E111.html
2: https://lintlyci.github.io/Flake8Rules/rules/E114.htmlReviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Signed-off-by: NRadostin Stoyanov <rstoyanov1@gmail.com>

Backslash between brackets in Python is redundant. [1]

1: https://lintlyci.github.io/Flake8Rules/rules/E502.htmlReviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Signed-off-by: NRadostin Stoyanov <rstoyanov1@gmail.com>

Replace the print statement, that is only available in Py2, with a
print function that is available in both Py2 and Py3 and drop the
explicit python version in the shebang.
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Signed-off-by: NRadostin Stoyanov <rstoyanov1@gmail.com>

The uniq() function returns a sorted list, there is no need
to sort this list again.
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Signed-off-by: NRadostin Stoyanov <rstoyanov1@gmail.com>

Use a set (unordered collections of unique elements) [1] to remove
repeated elements in a list.

1: https://docs.python.org/3/tutorial/datastructures.html#setsReviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Signed-off-by: NRadostin Stoyanov <rstoyanov1@gmail.com>

Lists in Python are mutable and when used as a default value of a
parameter for class constructor, its value will be shared between
all class instances.

Example:

	class Test:
	    def __init__(self, mylist=[]):
	        self.mylist = mylist

	A = Test()
	B = Test()
	A.mylist.append("mylist from instance A")
	print(B.mylist) # Will print ['mylist from instance A']
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Signed-off-by: NRadostin Stoyanov <rstoyanov1@gmail.com>

PEP8 recommends not having spaces around = in a keyword argument or
a default parameter value.

https://www.python.org/dev/peps/pep-0008/#other-recommendationsReviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Signed-off-by: NRadostin Stoyanov <rstoyanov1@gmail.com>

Improve readability by reducing the complexity and length of
conditional statements.

Example: The following condition:

	if (o >= 97 and o <= 122) or
	   (o >= 65 and o <= 90) or
	   (o >= 48 and o <= 57) or
	   (" \t(){}:;,+-*/%&!|[]=><".find(line[i]) == -1):

Will be True for every character that is not in string:
	" \t(){}:;,+-*/%&!|[]=><"
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Signed-off-by: NRadostin Stoyanov <rstoyanov1@gmail.com>

The functions like isalnum(), isalpha(), isdigit(), etc. are also
available in Python, however `make syntax-check` do not intend to
prohibit them.
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Signed-off-by: NRadostin Stoyanov <rstoyanov1@gmail.com>

Generate whitespace using the standard function ljust() that is
available in both Py3 [1] and Py2 [2].

1: https://docs.python.org/3/library/stdtypes.html?highlight=strip#str.ljust
2: https://docs.python.org/2.7/library/string.html#string.ljustReviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Signed-off-by: NRadostin Stoyanov <rstoyanov1@gmail.com>

Reduce the number of if-statements and use a single return.
Utilise a dictionary to map between occurrences and values.
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Signed-off-by: NRadostin Stoyanov <rstoyanov1@gmail.com>

The function generate_helper_header() only returns a formatted string.
This could be achieved without performing string concatenation.
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Signed-off-by: NRadostin Stoyanov <rstoyanov1@gmail.com>

The generate_helper_source() function returns a formatted string.
This could be achieved without the use of a local variable "source"
and string concatenation.
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Signed-off-by: NRadostin Stoyanov <rstoyanov1@gmail.com>

Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Signed-off-by: NRadostin Stoyanov <rstoyanov1@gmail.com>

PEP8 recommends removing whitespace immediately before a comma,
semicolon, or colon [1]. In addition remove multiple spaces after
keyword (PEP8 - E271).

1: https://www.python.org/dev/peps/pep-0008/#whitespace-in-expressions-and-statementsReviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Signed-off-by: NRadostin Stoyanov <rstoyanov1@gmail.com>

PEP8 recommends imports to be on separate lines. [1]

1: https://www.python.org/dev/peps/pep-0008/#importsReviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Signed-off-by: NRadostin Stoyanov <rstoyanov1@gmail.com>

The isinstance() function [1] returns true if an object argument is an
instance of a classinfo argument or of a direct, indirect subclass
thereof.

1: https://docs.python.org/3/library/functions.html#isinstanceReviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Signed-off-by: NRadostin Stoyanov <rstoyanov1@gmail.com>

<memballoon model='none'/> is the only way to disable balloon driver
since libvirt will add one automatically if the memballoon element is
missing. In other words, there's no balloon device if model is 'none'
and generating an alias for it makes no sense. The alias will be ignored
when parsing the XML and it will disappear once libvirtd is restarted.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

Some contributors are behind obnoxious firewalls that block everything
except http(s) traffic, preventing checkout of modules using the git://
protocol. Since git.savannah.gnu.org is using the modern, fast HTTP
transport, there's no real downside to using that by default.
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

In a recent change b932ed69: "virt-aa-helper: resolve yet to be created
paths" several cases with symlinks in paths were fixed, but it regressed
cases where the file being last element of the path was the actual link.

In the case of the last element being the symlink realpath can (and shall)
be called on the full path that was passed.

Examples would be zfs/lvm block devices like:
 <disk type='block' device='disk'>
    <driver name='qemu' type='raw'/>
    <source dev='/dev/mapper/testlvm-testvol1'/>
    <target dev='vdd' bus='virtio'/>
 </disk>
With the target being:
 /dev/mapper/testlvm-testvol1 -> ../dm-0

That currently is rendered as
 "/dev/mapper/testlvm-testvol1" rwk,
but instead should be (and is with the fix):
 "/dev/dm-0" rwk,

Fixes: b932ed69: "virt-aa-helper: resolve yet to be created paths"
Fixes: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1756394Signed-off-by: NChristian Ehrhardt <christian.ehrhardt@canonical.com>

libvirt-guests.sh when run with more active guests than requested to
shut down in parallel will run until it times out only shutting down
the first set of guests.

This patch fixes parallel shutdown by fixing a variable scope issue
where check_guests_shutdown unintentionally reset $guests which
prevented further progress.

Fixes: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1688508Signed-off-by: NChristian Ehrhardt <christian.ehrhardt@canonical.com>

Some of our scripts are known to work both with Python 2 and
Python 3, so for them we shouldn't be forcing any specific
version of the interpreter when they're called directly; we
always use $(PYTHON) explicitly in our build rules anyway.
Signed-off-by: NAndrea Bolognani <abologna@redhat.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>

Commit b4c2ac8d made a false assumption that IOMMU support necessary
for an mdev device to be assigned to a VM. Unlike direct PCI assignment,
IOMMU support is not needed for mediated devices, as the physical parent
device provides the isolation, therefore, simply checking for VFIO
presence is enough to successfully start a VM.

Luckily, this issue is not serious, since as of yet, libvirt mandates
mdevs to be pre-created prior to a domain's launch - if it is,
everything does work smoothly even with IOMMU disabled, because the
parent device will ensure the iommu groups we try to access exist.
However, if there are *no* IOMMU groups yet, thus no mdev exists yet, one
would see the following error:

"unsupported configuration: Mediated host device assignment requires VFIO
support"

The error msg above is simply wrong and doesn't even reflect the IOMMU
reality, so after applying this patch one would rather see the following
error in such case instead:

"device not found: mediated device '<UUID>' not found"
Signed-off-by: NErik Skultety <eskultet@redhat.com>

What one currently gets is:
failed to read '/sys/bus/mdev/devices/<UUID>/mdev_type/device_api': No
such file or directory

This indicates that something is missing within the device's sysfs tree
which likely might be not be the case here because the device simply
doesn't exist yet. So, when creating our internal mdev obj, let's check
whether the device exists first prior to trying to verify the
user-provided model within domain XML.
Signed-off-by: NErik Skultety <eskultet@redhat.com>

==16451== 32,768 bytes in 2 blocks are definitely lost in loss record 1,007 of 1,013
==16451==    at 0x4C2AF0F: malloc (vg_replace_malloc.c:299)
==16451==    by 0x7CADB40: nl_recv (in /usr/lib64/libnl-3.so.200.23.0)
==16451==    by 0x532DFAC: virNetlinkDumpCommand (virnetlink.c:363)
==16451==    by 0x53236AE: virNetDevIPCheckIPv6Forwarding (virnetdevip.c:641)
==16451==    by 0xE3E4A1A: networkStartNetworkVirtual (bridge_driver.c:2490)
==16451==    by 0xE3E55F5: networkStartNetwork (bridge_driver.c:2832)
==16451==    by 0xE3DFFE5: networkAutostartConfig (bridge_driver.c:531)
==16451==    by 0x53F47E0: virNetworkObjListForEachHelper (virnetworkobj.c:1412)
==16451==    by 0x52FE69F: virHashForEach (virhash.c:606)
==16451==    by 0x53F4857: virNetworkObjListForEach (virnetworkobj.c:1439)
==16451==    by 0xE3E0BF4: networkStateAutoStart (bridge_driver.c:808)
==16451==    by 0x55689CE: virStateInitialize (libvirt.c:758)
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NErik Skultety <eskultet@redhat.com>

The script already works perfectly fine with Python 2, but that's
more by chance than by design: we have a single occurrence of
print(), and it just so happens that its only argument is an
expression. Importing print_function makes the script more future,
err, past proof.
Signed-off-by: NAndrea Bolognani <abologna@redhat.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>

fix a mem leak
Signed-off-by: NChen Hanxiao <chenhanxiao@gmail.com>
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

fix some leaks and format issue
Also support virArpTableFree to get NULL.
Signed-off-by: NChen Hanxiao <chenhanxiao@gmail.com>

libxlDomainMigrationPrepare adds the incoming domain def to the list
of domains via virDomainObjListAdd, but never adds its own ref to the
returned virDomainObj as other callers of virDomainObjListAdd do.
libxlDomainMigrationPrepareTunnel3 suffers the same discrepancy.

Change both to add a ref to the virDomainObj after a successful
virDomainObjListAdd, similar to other callers. This ensures a consistent
pattern throughout the drivers and allows using the virDomainObjEndAPI
function for cleanup.
Signed-off-by: NJim Fehlig <jfehlig@suse.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>

For libxlDomainLookupByID and libxlDomainLookupByUUID let's
return a locked and referenced @vm object so that callers can
then use the common and more consistent virDomainObjEndAPI in
order to handle cleanup rather than needing to know that the
returned object is locked and calling virObjectUnlock.

The LookupByName already returns the ref counted and locked object,
so this will make things more consistent.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>
Reviewed-by: NJim Fehlig <jfehlig@suse.com>

Commit id '9ac94507' altered libxlDomObjFromDomain to return
a locked *and* ref counted object for some specific purposes;
however, it neglected to alter all the consumers of the helper
to use virDomainObjEndAPI thus leaving many objects with extra
ref counts.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>
Reviewed-by: NJim Fehlig <jfehlig@suse.com>

Another usage of deprecated 'string' functions. We are just trying to
match ascii letters here, so use a simple regex. And again drop the
aggressive exception handling, it doesn't seem to trigger for anything
in libvirt code.
Signed-off-by: NCole Robinson <crobinso@redhat.com>

Module 'string' function lower doesn't exist in python3. The canonical
way is to call .lower() on a str instance. Do that, and make the
exception handling more specific, which would have made this issue
obvious.
Signed-off-by: NCole Robinson <crobinso@redhat.com>

libxlDomObjFromDomain to returns locked and ref counted virDomainObj but
libxlDomainMigratePerform3Params only unlocks the object on exit. Convert
it to use the virDomainObjEndAPI function for cleanup.
Signed-off-by: NJim Fehlig <jfehlig@suse.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>

The libxlDomainMigrateConfirm3Params API locks and ref counts the associated
virDomainObj but relies on the helper function libxlDomainMigrationConfirm
to unlock the object. Unref'ing the object is not done in either function.
libxlDomainMigrationConfirm is also used by libxlDomainMigratePerform3Params
for p2p migration, but in that case the lock/ref and unref/unlock are
properly handled in the API entry point.

Remove the unlock from libxlDomainMigrationConfirm and adjust
libxlDomainMigrateConfirm3Params to properly unref/unlock the virDomainObj
on success and error paths.
Signed-off-by: NJim Fehlig <jfehlig@suse.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>

The libxlDomainMigrateBegin3Params API locks and ref counts the associated
virDomainObj but relies on the helper function libxlDomainMigrationBegin
to unref/unlock the object. libxlDomainMigrationBegin is also used by
libxlDomainMigratePerform3Params for p2p migration, but in that case the
lock/ref and unref/unlock are properly handled in the API entry point. So
p2p migrations suffer a double unref/unlock in the Perform API.

Remove the unref/unlock (virDomainObjEndAPI) from libxlDomainMigrationBegin
and adjust libxlDomainMigrateBegin3Params to properly unref/unlock
the virDomainObj on success and error paths.
Signed-off-by: NJim Fehlig <jfehlig@suse.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>

Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

We forgot to tell anyone that we were publishing security notices
online at https://security.libvirt.orgReviewed-by: NLaine Stump <laine@laine.org>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>