The original code ignored errors of virDomainHostdevDefAlloc,
however, we should properly do error return from the function
if it occurs.

The fix pulls out virDomainHostdevDefAlloc from the loop and
executes it all together before the loop. So we can easily
return on errors without the notion of other memory allocations
in the loop.

The deallocation code is separated from the allocation code
because it will be used by a further patch for fixing other error
handlings.
Reported-by: NLaine Stump <laine@laine.org>
Signed-off-by: NRyota Ozaki <ozaki.ryota@gmail.com>

The fixed loop used logical OR to combine two conditions, however,
it is apparently incorrect and logical AND is correct.

We can fix it by replacing OR with AND, but this patch instead
fixes the problem by getting rid of the first conditional
statement: USBFilterCount < def->nhostdevs. It isn't needed
because USBFilterCount will never be greater than or equal to
def->nhostdevs.

def->nhostdevs is calculated in the following code
above the loop in question like this:

    for (i = 0; i < deviceFilters.count; i++) {
        PRBool active = PR_FALSE;
        IUSBDeviceFilter *deviceFilter = deviceFilters.items[i];

        deviceFilter->vtbl->GetActive(deviceFilter, &active);
        if (active) {
            def->nhostdevs++;
        }
    }

And the loop is constructed as like this:

    for (i = 0; (USBFilterCount < def->nhostdevs) || (i < deviceFilters.count); i++) {
        PRBool active                  = PR_FALSE;
(snip)
        deviceFilter->vtbl->GetActive(deviceFilter, &active);
        if (!active)
            continue;
(snip)
        USBFilterCount++;
    }

So def->nhostdevs is the number of active device filters and
USBFilterCount is counted up only when a device filter is active.
Thus, we can remove USBFilterCount < def->nhostdevs safely.
Reported-by: NLaine Stump <laine@laine.org>
Signed-off-by: NRyota Ozaki <ozaki.ryota@gmail.com>

Makefile.am, vbox_V4_3.c and vbox_driver.c do regular
modifitions to support a new version of APIs.

vbox_tmpl.c basically fixes incompatibilities since 4.2.

The affected incompatibilities of 4.3 are:
* IMachine::Delete() has been renamed to IMachine::deleteConfig()
* IMedium::CreateBaseStorage() now accepts multiple variant values
* IDisplay::GetScreenResolution() now returns the display position
  in the guest
* IMachine now has multiple IUSBControllers and IUSBDeviceFilters
  handles USB device filters instead of (obsolete) IUSBController

This patch is tested on Mac OS X 10.8.5 and Fedora 19.
Signed-off-by: NRyota Ozaki <ozaki.ryota@gmail.com>

The USB-related code in vboxDomainGetXMLDesc is deeply nested and
difficult to add new code. So flatten it. To do so, the code is
pulled out from vboxDomainGetXMLDesc to make the function short
and to leaverage early return and goto for error handling.
Signed-off-by: NRyota Ozaki <ozaki.ryota@gmail.com>

This cleanup flattens deeply nested code.
Signed-off-by: NRyota Ozaki <ozaki.ryota@gmail.com>

Most of our code base uses space after comma but not before;
fix the remaining uses before adding a syntax check.

* src/vbox/vbox_tmpl.c: Consistently use commas.
Signed-off-by: NEric Blake <eblake@redhat.com>

A USB filter is stored in a hostdev. The original code doesn't
allocate hostdev->info that is expected to be allocated with hostdev.
So use virDomainHostdevDefAlloc() to allocate both as we expect.
Signed-off-by: NRyota Ozaki <ozaki.ryota@gmail.com>

Currently we were storing domain feature flags in a bit field as the
they were either enabled or disabled. New features such as paravirtual
spinlocks however can be tri-state as the default option may depend on
hypervisor version.

To allow storing tri-state feature state in the same place instead of
having to declare dedicated variables for each feature this patch
refactors the bit field to an array.

Most of the usage of getuid()/getgid() is in cases where we are
considering what privileges we have. As such the code should be
using the effective IDs, not real IDs.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

Unconditional use of getenv is not secure in setuid env.
While not all libvirt code runs in a setuid env (since
much of it only exists inside libvirtd) this is not always
clear to developers. So make all the code paranoid, even
if it only ever runs inside libvirtd.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

VirtualBox has 'saved' state for VMs saved by the hypervisor.
However, the state is treated as VIR_DOMAIN_NOSTATE by the vbox
driver, resulting that virsh shows 'no state' for saved VMs.

The fix treats the state as VIR_DOMAIN_SHUTOFF as same as
other domains such as qemu.
Signed-off-by: NRyota Ozaki <ozaki.ryota@gmail.com>

The code for converting between virtualbox API states
and libvirt states was duplicated in two places. Pull
the code out into a shared helper method.
Signed-off-by: NRyota Ozaki <ozaki.ryota@gmail.com>

Convert the type of loop iterators named 'i', 'j', k',
'ii', 'jj', 'kk', to be 'size_t' instead of 'int' or
'unsigned int', also santizing 'ii', 'jj', 'kk' to use
the normal 'i', 'j', 'k' naming
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

A few things have changed in the VirtualBox API - some small
(capitalizations of things in function names like Ip to IP
and Dhcp to DHCP) and some much larger (FindMedium is superceded
by OpenMedium). The biggest change for the sake of this patch
is the signature of CreateMachine is quite a bit different. Using
the Oracle source as a guide, to spin up a VM with a given UUID,
it looks like a text flag has to be passed in a new argument to
CreateMachine. This flag is built in the VirtualBox 4.2 specific
ifdefs and is kind of ugly but works. Additionally, there is now
(unused) VM groups support in CreateMachine and the previous
'osTypeId' arg is currently set to nsnull as in the Oracle code.

The FindMedium to OpenMedium changes were more straightforward
and are pretty clear. The rest of the vbox template changes are
basically spelling/capitalization changes from the looks of things.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

I noticed several unusual spacings in for loops, and decided to
fix them up.  See the next commit for the syntax check that found
all of these.

* examples/domsuspend/suspend.c (main): Fix spacing.
* python/libvirt-override.c: Likewise.
* src/conf/interface_conf.c: Likewise.
* src/security/virt-aa-helper.c: Likewise.
* src/util/virconf.c: Likewise.
* src/util/virhook.c: Likewise.
* src/util/virlog.c: Likewise.
* src/util/virsocketaddr.c: Likewise.
* src/util/virsysinfo.c: Likewise.
* src/util/viruuid.c: Likewise.
* src/vbox/vbox_tmpl.c: Likewise.
* src/xen/xen_hypervisor.c: Likewise.
* tools/virsh-domain-monitor.c (vshDomainStateToString): Drop
default case, to let compiler check us.
* tools/virsh-domain.c (vshDomainVcpuStateToString): Likewise.
Signed-off-by: NEric Blake <eblake@redhat.com>

In my review of 31532cab I missed the fact that VIR_STRDUP
now returns 1 on success, and 0 if the source was NULL.

(This still doesn't add proper OOM error handling.)

Now that COPYING no longer contains the text of the LGPL,
modify the LGPLv2-only files from vbox to call out the
correct file.

* src/vbox/vbox_CAPI_v2_2.h: Refer to correct file.
* src/vbox/vbox_CAPI_v3_0.h: Likewise.
* src/vbox/vbox_CAPI_v3_1.h: Likewise.
* src/vbox/vbox_CAPI_v3_2.h: Likewise.
* src/vbox/vbox_CAPI_v4_0.h: Likewise.
* src/vbox/vbox_CAPI_v4_1.h: Likewise.
* src/vbox/vbox_V2_2.c: Likewise.
* src/vbox/vbox_V3_0.c: Likewise.
* src/vbox/vbox_V3_1.c: Likewise.
* src/vbox/vbox_XPCOMCGlue.c: Likewise.
* src/vbox/vbox_XPCOMCGlue.h: Likewise.
* src/vbox/vbox_driver.c: Likewise.
* src/vbox/vbox_driver.h: Likewise.
* src/vbox/vbox_tmpl.c: Likewise.
* src/vbox/vbox_V3_2.c: Copy license notice from vbox_V3_1.c.
* src/vbox/vbox_V4_0.c: Likewise.
* src/vbox/vbox_V4_1.c: Likewise.
* src/vbox/README: Mention copyright issues; this particular
file contains no code and therefore does not need LGPL.
Signed-off-by: NEric Blake <eblake@redhat.com>

The individual hypervisor drivers were directly referencing
APIs in src/nodeinfo.c in their virDriverPtr struct. Separate
these methods, so there is always a wrapper in the hypervisor
driver. This allows the unused virConnectPtr args to be
removed from the nodeinfo.c file. Again this will ensure that
ACL checks will only be performed on invocations that are
directly associated with public API usage.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

Currently the virGetHostname() API has a bogus virConnectPtr
parameter. This is because virtualization drivers directly
reference this API in their virDriverPtr tables, tieing its
API design to the public virConnectGetHostname API design.

This also causes problems for access control checks since
these must only be done for invocations from the public
API, not internal invocation.

Remove the bogus virConnectPtr parameter, and make each
hypervisor driver provide a dedicated function for the
driver API impl. This will allow access control checks
to be easily inserted later.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

The source code base needs to be adapted as well. Some files
include virutil.h just for the string related functions (here,
the include is substituted to match the new file), some include
virutil.h without any need (here, the include is removed), and
some require both.

Ensure that all drivers implementing public APIs use a
naming convention for their implementation that matches
the public API name.

eg for the public API   virDomainCreate make sure QEMU
uses qemuDomainCreate and not qemuDomainStart
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

It will simplify later work if the sub-drivers have dedicated
APIs / field names. ie virNetworkDriver should have
virDrvNetworkOpen and virDrvNetworkClose methods
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

Ensure that the driver struct field names match the public
API names. For an API virXXXX we must have a driver struct
field xXXXX. ie strip the leading 'vir' and lowercase any
leading uppercase letters.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

This patch refactors various places to allow removing of the
defaultConsoleTargetType callback from the virCaps structure.

A new console character device target type is introduced -
VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_NONE - to mark that no type was
specified in the XML. This type is at the end converted to the standard
VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_SERIAL. Other types that are
different from this default have to be processed separately in the
device post parse callback.

Use the virDomainXMLConf structure to hold this data and tweak the code
to avoid semantic change.

Without configuration the KVM mac prefix is used by default. I chose it
as it's in the privately administered segment so it should be usable for
any purposes.

Move the xmlopt and caps arguments to the end of the argument list.

This patch adds instrumentation that will allow hypervisor drivers to
fill and validate domain and device definitions after parsed by the XML
parser.

With this patch, after the XML is parsed, a callback to the driver is
issued requesting to fill and validate driver specific details of the
configuration. This allows to use sensible defaults and checks on a per
driver basis at the time the XML is parsed.

Two callback pointers are stored in the new virDomainXMLConf object:
* virDomainDeviceDefPostParseCallback (devicesPostParseCallback)
  - called for a single device parsed and for every single device in a
    domain config. A virDomainDeviceDefPtr is passed along with the
    domain definition and virCaps.

* virDomainDefPostParseCallback, (domainPostParseCallback)
  - A callback that is meant to process the domain config after it's
  parsed.  A virDomainDefPtr is passed along with virCaps.

Both types of callbacks support arbitrary opaque data passed for the
callback functions.

Errors may be reported in those callbacks resulting in a XML parsing
failure.

This patch is the result of running:

for i in $(git ls-files | grep -v html | grep -v \.po$ ); do
  sed -i -e "s/virDomainXMLConf/virDomainXMLOption/g" -e "s/xmlconf/xmlopt/g" $i
done

and a few manual tweaks.

The virCaps structure gathered a ton of irrelevant data over time that.
The original reason is that it was propagated to the XML parser
functions.

This patch aims to create a new data structure virDomainXMLConf that
will contain immutable data that are used by the XML parser. This will
allow two things we need:

1) Get rid of the stuff from virCaps

2) Allow us to add callbacks to check and add driver specific stuff
after domain XML is parsed.

This first attempt removes pointers to private data allocation functions
to this new structure and update all callers and function that require
them.

To enable virCapabilities instances to be reference counted,
turn it into a virObject. All cases of virCapabilitiesFree
turn into virObjectUnref
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

Adjust the macros to free memory allocated during various calls to
perform the check if parameter is NULL prior to really freeing and to
set the pointer to NULL after done freeing.

Resolve a false positive from 'vboxIIDFromUUID_v2_x()'. The code sets
'iid->value = &iid->backing' unconditionally prior to calling 'nsIDFromChar()'.
The 'vboxIIDUnalloc_v2_x()' checks iid->value to not be &iid->backing. The
iid->backing is a static buffer within the initialized structure.