Some of the fields are either immutable or self locking, so make a note
of that for future reference.

It's filled and then freed, but not used anywhere else.

Avoid reimplementing it 3 times.

Retrieve domain objects with reference and release them with
virDomainObjEndAPI.

The test driver copies the domain definition correctly so we can reuse
the helper.

In a couple of cases, the node device driver (and the test node device
driver which likely copied it) was only logging "Node device not
found" when it couldn't find the requested device. This patch changes
those cases to log the name (and in the case when it's relevant, the
wwnn and wwpn) as well.

For some reason a union (_virNodeDevCapData) that had only been
declared inside the toplevel struct virNodeDevCapsDef was being used
as an argument to functions all over the place. Since it was only a
union, the "type" attribute wasn't necessarily sent with it. While
this works, it just seems wrong.

This patch creates a toplevel typedef for virNodeDevCapData and
virNodeDevCapDataPtr, making it a struct that has the type attribute
as a member, along with an anonymous union of everything that used to
be in union _virNodeDevCapData. This way we only have to change the
following:

  s/union _virNodeDevCapData */virNodeDevCapDataPtr /

and

  s/caps->type/caps->data.type/

This will make me feel less guilty when adding functions that need a
pointer to one of these.

Every domain that grabs a domain object to work over should
reference it to make sure it won't disappear meanwhile.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

This needs to specified in way too many places for a simple validation
check. The ostype/arch/virttype validation checks later in
DomainDefParseXML should catch most of the cases that this was covering.

Rather than an opencoded string. This should be a no-op

In the order of appearance:

* MAX_LISTEN - never used
  added by 23ad665c (qemud) and addec57 (lock daemon)

* NEXT_FREE_CLASS_ID - never used, added by 07d1b6b5

* virLockError - never used, added by eb8268a4

* OPENVZ_MAX_ARG, CMDBUF_LEN, CMDOP_LEN
  unused since the removal of ADD_ARG_LIT in d8b31306

* QEMU_NB_PER_CPU_STAT_PARAM - unused since 897808e7

* QEMU_CMD_PROMPT, QEMU_PASSWD_PROMPT - unused since 1dc10a7b

* TEST_MODEL_WORDSIZE - unused since c25c18f7

* TEMPDIR - never used, added by 714bef5b

* NSIG - workaround around old headers
  added by commit 60ed1d2a
  unused since virExec was moved by commit 02e86910

* DO_TEST_PARSE - never used, added by 9afa0060

* DIFF_MSEC, GETTIMEOFDAY - unused since eee6eb66

This function does not make any sense now, that network driver is
(almost) dropped. I mean, previously, when threads were
serialized, this function was there to check, if no other network
with the same name or UUID exists. However, nowadays that threads
can run more in parallel, this function is useless, in fact it
gives misleading return values. Consider the following scenario.
Two threads, both trying to define networks with same name but
different UUID (e.g. because it was generated during XML parsing
phase, whatever). Lets assume that both threads are about to call
networkValidate() which immediately calls
virNetworkObjIsDuplicate().

T1: calls virNetworkObjIsDuplicate() and since no network with
given name or UUID exist, success is returned.
T2: calls virNetworkObjIsDuplicate() and since no network with
given name or UUID exist, success is returned.

T1: calls virNetworkAssignDef() and successfully places its
network into the virNetworkObjList.
T2: calls virNetworkAssignDef() and since network with the same
name exists, the network definition is replaced.

Okay, this is mainly because virNetworkAssignDef() does not check
whether name and UUID matches. Well, lets make it so! And drop
useless function too.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

As there are two possible approaches to define a domain's memory size -
one used with legacy, non-NUMA VMs configured in the <memory> element
and per-node based approach on NUMA machines - the user needs to make
sure that both are specified correctly in the NUMA case.

To avoid this burden on the user I'd like to replace the NUMA case with
automatic totaling of the memory size. To achieve this I need to replace
direct access to the virDomainMemtune's 'max_balloon' field with
two separate getters depending on the desired size.

The two sizes are needed as:
1) Startup memory size doesn't include memory modules in some
hypervisors.
2) After startup these count as the usable memory size.

Note that the comments for the functions are future aware and document
state that will be present after a few later patches.

Well, if 'everywhere' is defined as that part of the driver code
that serves virNetwork* APIs. Again, we lower layers already have
their locks, so there's no point doing big lock.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

This patch turns both virNetworkObjFindByUUID() and
virNetworkObjFindByName() to return an referenced object so that
even if caller unlocks it, it's for sure that object won't
disappear meanwhile. Especially if the object (in general) is
locked and unlocked during the caller run.
Moreover, this commit is nicely small, since the object unrefing
can be done in virNetworkObjEndAPI().
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

So far, this is pure code replacement. But once we introduce
reference counting to virNetworkObj this will be more handy as
there'll be only one function to change: virNetworkObjEndAPI().
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

So far it's just a structure which happens to have 'Obj' in its
name, but otherwise it not related to virObject at all. No
reference counting, not virObjectLock(), nothing.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

Well, one day this will be self-locking object, but not today.
But lets prepare the code for that! Moreover,
virNetworkObjListFree() is no longer needed, so turn it into
virNetworkObjListDispose().
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

It's returning virNetworkObjPtr after all. And it matches the
pattern laid out by domain_conf.h.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

It's returning virNetworkObjPtr after all. And it matches the
pattern laid out by domain_conf.h.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

In order to hide the object internals (and use just accessors
everywhere), lets store a pointer to the object, instead of object
itself.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

Instead of copying the whole object onto stack when calling the
function, just pass the pointer to the object and save up some
space on the stack. Moreover, this prepares the code to hide the
virNetworkObjList structure into network_conf.c and use accessors
only.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

Silly this bug went unnoticed so long. At the beginning we try to
find the passed network in the list of network objects. If found,
it's locked and real work takes place. Then, in the end, the
network object is never unlocked.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

Allow the callers to pass down libvirt-internal flags.

For stateless, client side drivers, it is never correct to
probe for secondary drivers. It is only ever appropriate to
use the secondary driver that is associated with the
hypervisor in question. As a result the ESX & HyperV drivers
have both been forced to do hacks where they register no-op
drivers for the ones they don't implement.

For stateful, server side drivers, we always just want to
use the same built-in shared driver. The exception is
virtualbox which is really a stateless driver and so wants
to use its own server side secondary drivers. To deal with
this virtualbox has to be built as 3 separate loadable
modules to allow registration to work in the right order.

This can all be simplified by introducing a new struct
recording the precise set of secondary drivers each
hypervisor driver wants

struct _virConnectDriver {
    virHypervisorDriverPtr hypervisorDriver;
    virInterfaceDriverPtr interfaceDriver;
    virNetworkDriverPtr networkDriver;
    virNodeDeviceDriverPtr nodeDeviceDriver;
    virNWFilterDriverPtr nwfilterDriver;
    virSecretDriverPtr secretDriver;
    virStorageDriverPtr storageDriver;
};

Instead of registering the hypervisor driver, we now
just register a virConnectDriver instead. This allows
us to remove all probing of secondary drivers. Once we
have chosen the primary driver, we immediately know the
correct secondary drivers to use.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

The virDomainDefineXMLFlags and virDomainCreateXML APIs both
gain new flags allowing them to be told to validate XML.
This updates all the drivers to turn on validation in the
XML parser when the flags are set

The virDomainDefParse* and virDomainDefFormat* methods both
accept the VIR_DOMAIN_XML_* flags defined in the public API,
along with a set of other VIR_DOMAIN_XML_INTERNAL_* flags
defined in domain_conf.c.

This is seriously confusing & error prone for a number of
reasons:

 - VIR_DOMAIN_XML_SECURE, VIR_DOMAIN_XML_MIGRATABLE and
   VIR_DOMAIN_XML_UPDATE_CPU are only relevant for the
   formatting operation
 - Some of the VIR_DOMAIN_XML_INTERNAL_* flags only apply
   to parse or to format, but not both.

This patch cleanly separates out the flags. There are two
distint VIR_DOMAIN_DEF_PARSE_* and VIR_DOMAIN_DEF_FORMAT_*
flags that are used by the corresponding methods. The
VIR_DOMAIN_XML_* flags received via public API calls must
be converted to the VIR_DOMAIN_DEF_FORMAT_* flags where
needed.

The various calls to virDomainDefParse which hardcoded the
use of the VIR_DOMAIN_XML_INACTIVE flag change to use the
VIR_DOMAIN_DEF_PARSE_INACTIVE flag.

Make sure every virt driver implements virDomainDefineXMLFlags
by adding a trivial passthrough from the existing impl with
no flags set.

I noticed this while working on qemuDomainGetBlockInfo.  Assigning
a bool value to an int variable compiles fine, but raises red flags
on the maintenance front as it becomes too easy to assign -1 or 2
or any other non-bool value to the same variable.

* cfg.mk (sc_prohibit_int_assign_bool): New rule.
* src/conf/snapshot_conf.c (virDomainSnapshotRedefinePrep): Fix
offenders.
* src/qemu/qemu_driver.c (qemuDomainGetBlockInfo)
(qemuDomainSnapshotCreateXML): Likewise.
* src/test/test_driver.c (testDomainSnapshotAlignDisks):
Likewise.
* src/util/vircgroup.c (virCgroupSupportsCpuBW): Likewise.
* src/util/virpci.c (virPCIDeviceBindToStub): Likewise.
* src/util/virutil.c (virIsCapableVport): Likewise.
* tools/virsh-domain-monitor.c (cmdDomMemStat): Likewise.
* tools/virsh-domain.c (cmdBlockResize, cmdScreenshot)
(cmdInjectNMI, cmdSendKey, cmdSendProcessSignal)
(cmdDetachInterface): Likewise.
Signed-off-by: NEric Blake <eblake@redhat.com>

Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

Since the secondary drivers are only active when the primary
driver is also the Test driver, there is no need to use the
different type specific privateData fields.

C guarantees that static variables are zero-initialized.  Some older
compilers (and also gcc -fno-zero-initialized-in-bss) create larger
binaries if you explicitly zero-initialize a static variable.

* src/libxl/libxl_driver.c: Fix initialization.
* src/lxc/lxc_controller.c: Likewise.
* src/openvz/openvz_util.c (openvzKBPerPages): Likewise.
* src/phyp/phyp_driver.c: Likewise.
* src/remote/remote_driver.c: Likewise.
* src/test/test_driver.c: Likewise.
* src/uml/uml_driver.c: Likewise.
* src/vbox/vbox_XPCOMCGlue.c: Likewise.
* src/vbox/vbox_tmpl.c: Likewise.
* src/xen/xen_driver.c: Likewise.
* src/xen/xen_hypervisor.c: Likewise.
Signed-off-by: NEric Blake <eblake@redhat.com>

To prepare for introducing a single global driver, rename the
virDriver struct to virHypervisorDriver and the registration
API to virRegisterHypervisorDriver()