The previous patch started a separation of error messages
reported against the user-specified name, vs. tracking the
canonical path that was actually opened.  This patch extends
that notion, by hoisting directory detection up front, passing
the canonical path through the entire call chain, and
simplifying lower-level functions that can now assume that
a canonical path and directory have been supplied.

* src/util/virstoragefile.c
(virStorageFileGetMetadataFromFDInternal)
(virStorageFileGetMetadataInternal): Add parameter, require
directory.
(virFindBackingFile): Require directory.
(virStorageFileGetMetadataFromFD): Pass canonical path.
(virStorageFileGetMetadataFromBuf): Likewise.
(virStorageFileGetMetadata): Determine initial directory.
Signed-off-by: NEric Blake <eblake@redhat.com>

The function isn't used in any other file. Convert it to static.

Refactor the function to avoid multiple wrappers splitting identical
fields from the now common metadata struct.

The refactor is done by folding in the wrapper used for disk sources
which allows us to lookup secrets via the secret driver. This may allow
using stored secrets for snapshot disk images too in the future.

Now that we store all metadata about a storage image in a
virStorageSource struct let's use it also to store information needed by
the storage driver to access and do operations on the files.

Now that storage source metadata is stored in a single struct we don't
need two initialization functions for different structs.

Now that the storage source definition is uniform convert the helpers to
retrieve the actual storage type to a single one.

https://bugzilla.redhat.com/show_bug.cgi?id=1024159

If adding a volume to a storage pool fails during the CreateXML or
CreateXMLFrom API's, we don't want to adjust the available and
allocation values for the storage pool during storageVolDelete
since we haven't adjusted the values for the create.

Refactor storageVolDelete() a bit to create a storageVolDeleteInternal()
which will handle the primary deletion activities.  Add a parameter
updateMeta which will signify whether to update the values or not.

Adjust the calls from CreateXML and CreateXMLFrom to directly call the
DeleteInternal with the pool lock held.  This does bypass the call
to virStorageVolDeleteEnsureACL().

Introduced in commit d1e55de3.
virstoragetest.c: In function ‘testStorageChain’:
virstoragetest.c:249:10: warning: declaration of ‘abs’ shadows a global
declaration [-Wshadow]

As we can use virBhyveCapsBuild() now, replace
testBhyveBuildCapabilities() with it.

Another reduction in the number of structs I have to modify
when I start tracking new fields in virStorageFileMetadata.

* tests/virstoragetest.c (_testFileData): Add fields.
(testStorageChain): Select between fields based on flag.
(mymain): Record both absolute and relative expectations in one
struct.
Signed-off-by: NEric Blake <eblake@redhat.com>

As I add more tests, it's getting harder to follow the split between
a struct in one place and a test using the struct in another.
Interleaving the tests makes changes more localized, and also makes
debugging easier when a test goes wrong during my refactoring work.

* tests/virstoragetest.c (mymain): Modify structs as we go, rather
than up-front.
(testStorageChain): Make failure debugging easier.
Signed-off-by: NEric Blake <eblake@redhat.com>

Part of the upcoming refactoring will change how broken chains
are detected; it makes sense to test that this works.  In
particular, test the just-fixed infinite loop detection bug.
Also, make sure that detection of directories is sane.

* tests/virstoragetest.c (testStorageChain): Enhance test.
(mymain): Add more tests.
(testCleanupImages, testPrepImages): Populate a directory.
Signed-off-by: NEric Blake <eblake@redhat.com>

While trying to refactor the backing file chain, I noticed that
if you have a self-referential qcow2 file via a relative name:

qemu-img create -f qcow2 loop 10M
qemu-img rebase -u -f qcow2 -F qcow2 -b loop loop

then libvirt was creating a chain 2 deep before realizing it
had hit a loop; furthermore, virStorageFileChainCheckBroken
was not identifying the chain as broken.  With this patch,
the loop is detected when the chain is only 1 deep; still
enough for storage volume XML to display the file, but now
with a proper error report about where the loop was found.

This patch adds a parameter to virStorageFileGetMetadataRecurse,
so that errors at the top of the chain remain unchanged; messages
issued for backing files now use the name provided by the user
instead of the canonical name (for VDSM, which uses relative
symlinks to device mapper block devices, this is actually more
useful).

* src/util/virstoragefile.c (virStorageFileGetMetadataRecurse):
Add parameter, require canonical path up front.  Mark chain
broken on OOM or loop detection.
(virStorageFileGetMetadata): Pass in canonical name.
Signed-off-by: NEric Blake <eblake@redhat.com>

Since commit 7457cbe8 the vmware driver version isn't set anymore.
Signed-off-by: NEric Blake <eblake@redhat.com>

The only implemented test for now is domain metadata test.

Implement domainSetMetadata and domainGetMetadata driver calls.

Fix incorrect ATTRIBUTE_NONNULL usage introduced in 17b17565
which caused build failure:

bhyve/bhyve_driver.c:127:48: error: expected ')'
bhyveDriverGetCapabilities(bhyveConnPtr driver ATTRIBUTE_NONNULL)
                                               ^
bhyve/bhyve_driver.c:127:27: note: to match this '('
bhyveDriverGetCapabilities(bhyveConnPtr driver ATTRIBUTE_NONNULL)

Pushed under the build breaker rule.

Commit b9dd878f (util: make it easier to grab only regular command exit)
changed the call semantics of virCommandRun() and therefore of virRun()
too. But lxcCheckNetNsSupport() was not updated.
As consequence of this lxcCheckNetNsSupport always failed and broke LXC.
Signed-off-by: NRichard Weinberger <richard@nod.at>

My commit c9123fbe introduced this copy-and-paste error.

Now that we ditched our custom pthread impl for Win32, we can
use PTHREAD_MUTEX_INITIALIZER for static mutexes. This avoids
the need to use a virOnce one-time global initializer in a
number of places.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

Use a syntax-check rule to force PCI, USB and SCSI instead
of Pci, Usb and Scsi.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

Since it is an abbreviation, PCI should always be fully
capitalized or full lower case, never Pci.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

Since it is an abbreviation, USB should always be fully
capitalized or full lower case, never Usb.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

Since it is an abbreviation, SCSI should always be fully
capitalized or full lower case, never Scsi.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

Remove the virsystemdmock.la library and instead make use
of the shared virmockdbus.la library
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

A number of test suites want to mock the DBus APIs. To avoid
re-inventing the wheel create a re-usable virmockdbus.la
library for LD_PRELOAD usage.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

Introduce virmock.h which provides some macros to assist in
creation of LD_PRELOAD overrides. When these are used, the
LD_PRELOAD code simply has some stubs which forward to a
wrapper function inside the main test case. This means that
logic for the test no longer has to be split between the
virXXXtest.c and virXXXmock.c files. It will also make it
possible to provide some common reusable modules for mocking
code like DBus.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

Functions virNetDevRestoreMacAddress() and virNetDevRestoreMacAddress()
allocate memory for variable @path using virAsprintf(), but they
haven't freed that memory before returning out.
Signed-off-by: NZhang bo <oscar.zhangbo@huawei.com>
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

At the beginning of the function we gain a reference to the driver
capabilities. Then, we call format function (*) which if failed, unref
over caps is called. Then, at the end another unref occurs.

* - Moreover, the format was not called over gained caps, but over
privconn->caps directly which is not allowed anymore.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

The driver passed as the only argument to the function should never be
NULL so there's no need to check it. After removing it, the whole
function collapses to a single line doing ref over driver
capabilities.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

Since b15a2bbd we have the new bhyve_capabilities.[ch] files.
However, the copyright is held by both Roman and Semihalf.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

As observed when building in a chroot and QEMU_USER doesn't exist

to avoid

CCLD     storagevolxml2argvtest
/usr/bin/ld: ../src/.libs/libvirt_driver_storage_impl.a(libvirt_driver_storage_impl_la-storage_backend.o): undefined reference to symbol 'xmlFreeDoc@@LIBXML2_2.4.30'
//usr/lib/x86_64-linux-gnu/libxml2.so.2: error adding symbols: DSO missing from command line

I noticed that the apparmor code could request metadata even
for a cdrom with no media, which would cause a memory leak of
the hash table used to look for loops in the backing chain.
But even before that, we blindly dereferenced the path for
printing a debug statement, so it is just better to enforce
that this is only used on non-NULL names.

* src/util/virstoragefile.c (virStorageFileGetMetadata): Assume
non-NULL path.
* src/util/virstoragefile.h: Annotate this.
* src/security/virt-aa-helper.c (get_files): Fix caller.
Signed-off-by: NEric Blake <eblake@redhat.com>

Implement support for connectCompareCPU.

- Move all capabilities functions to separate file
- Add initCPU

Implement bhyveConnectBaselineCPU to support OpenStack/Nova

Other drivers in libvirt (e.g. network, qemu) will automatically
return the "inactive" (persistent configuration) XML of an object when
that object is inactive. The netcf backend of the interface driver
would always try to return the live status XML of the interface, even
when it was down. Although netcf does return valid XML in that case,
for bond interfaces it is missing almost all of its content, including
the <bond> subelement itself, leading to this error message from
"virsh iface-dumpxml" of a bond interface that is inactive:

  error: XML error: bond interface misses the bond element

(this is because libvirt's validation of the XML returned by netcf
always requires a <bond> element be present).

This patch modifies the interface driver netcf backend to check if the
interface is inactive, and in that case always return the inactive XML
(which will always have a <bond> element, thus eliminating the error
message, as well as making operation more in line with other drivers.

This fixes the following bug:

  https://bugzilla.redhat.com/show_bug.cgi?id=878394

I almost wrote a hash value free function that just called
VIR_FREE, then realized I couldn't be the first person to
do that.  Sure enough, it was worth factoring into a common
helper routine.

* src/util/virhash.h (virHashValueFree): New function.
* src/util/virhash.c (virHashValueFree): Implement it.
* src/util/virobject.h (virObjectFreeHashData): New function.
* src/libvirt_private.syms (virhash.h, virobject.h): Export them.
* src/nwfilter/nwfilter_learnipaddr.c (virNWFilterLearnInit): Use
common function.
* src/qemu/qemu_capabilities.c (virQEMUCapsCacheNew): Likewise.
* src/qemu/qemu_command.c (qemuDomainCCWAddressSetCreate):
Likewise.
* src/qemu/qemu_monitor.c (qemuMonitorGetBlockInfo): Likewise.
* src/qemu/qemu_process.c (qemuProcessWaitForMonitor): Likewise.
* src/util/virclosecallbacks.c (virCloseCallbacksNew): Likewise.
* src/util/virkeyfile.c (virKeyFileParseGroup): Likewise.
* tests/qemumonitorjsontest.c
(testQemuMonitorJSONqemuMonitorJSONGetBlockInfo): Likewise.
Signed-off-by: NEric Blake <eblake@redhat.com>