Preparation for switching to virFileCache where there are two callbacks,
one to get a new data and second one to load a cached data.

This also removes virQEMUCapsReset which is no longer required.
Signed-off-by: NPavel Hrdina <phrdina@redhat.com>
Reviewed-by: NJiri Denemark <jdenemar@redhat.com>

It's not required and following patches will change the code.
Signed-off-by: NPavel Hrdina <phrdina@redhat.com>
Reviewed-by: NJiri Denemark <jdenemar@redhat.com>

Signed-off-by: NPavel Hrdina <phrdina@redhat.com>
Reviewed-by: NJiri Denemark <jdenemar@redhat.com>

Signed-off-by: NPavel Hrdina <phrdina@redhat.com>
Reviewed-by: NJiri Denemark <jdenemar@redhat.com>

Cleanups the code a little bit and reduces amount of arguments passed
throughout the functions.
Signed-off-by: NPavel Hrdina <phrdina@redhat.com>
Reviewed-by: NJiri Denemark <jdenemar@redhat.com>

While searching for an element using a function it may be
desirable to know the element key for future operation.
Signed-off-by: NPavel Hrdina <phrdina@redhat.com>
Reviewed-by: NJiri Denemark <jdenemar@redhat.com>

At present shared disks can be migrated with either readonly or cache=none. But
cache=directsync should be safe for migration, because both cache=directsync and cache=none
don't use the host page cache, and cache=direct write through qemu block layer cache.
Signed-off-by: NPeng Hao <peng.hao2@zte.com.cn>
Reviewed-by: NWang Yechao <wang.yechao255@zte.com.cn>

Use virStorageSource accessors to check the file and call
virStorageFileAccess before even attempting to stat the target. This
will be helpful once we try to add network destinations for block copy,
since there will be no need to stat them.

Move the code into a separate function so that the flow of creating the
copy is more obvious and split into logical pieces.

Rather than using the local-file only implementation 'qemuOpenFile'
switch to the imagelabel aware storage driver implementation.

When copying to a block device, the block device will already exist. To
allow users using a block device without any preparation, they need to
use the block copy without VIR_DOMAIN_BLOCK_COPY_REUSE_EXT.

This means that if the target is an existing block device we don't need
to prepare it, but we can't reject it as being existing.

To avoid breaking this feature, explicitly assume that existing block
devices will be reused even without that flag explicitly specified,
while skipping attempts to create it.

qemuMonitorDriveMirror still needs to honor the flag as specified by the
user, since qemu overwrites the metadata otherwise.

Extract the presence of the flag into a boolean to simplify conditions
and allow further manipulation of the state of the flag.

   For attaching hosdev, we should set dev->data.hostdev
   rather than dev->data.disk
Signed-off-by: NChen Hanxiao <chenhanxiao@gmail.com>

@remote_file, allocated by virAsprintf, was not freed and leaked.
Signed-off-by: NZhipeng Lu <lu.zhipeng@zte.com.cn>

@map_device, allocated by virAsprintf in virStorageBackendCreateVols,
was not freed and leaked.
Signed-off-by: NZhipeng Lu <lu.zhipeng@zte.com.cn>

Should be followed with qemuDomainObjExitMonitor only if
qemuDomainObjEnterMonitorAsync returns 0.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

The refactor to split up storage driver into modules broke the apparmor
helper program, since that did not initialize the storage driver
properly and thus detection of the backing chain could not work.

Register the storage driver backends explicitly. Unfortunately it's now
necessary to link with the full storage driver to satisfy dependencies
of the loadable modules.
Reviewed-by: NChristian Ehrhardt <christian.ehrhardt@canonical.com>
Reported-by: NChristian Ehrhardt <christian.ehrhardt@canonical.com>
Tested-by: NChristian Ehrhardt <christian.ehrhardt@canonical.com>

The purpose of this function is to tell if the current position
in given FD is in data section or a hole and how much bytes there
is remaining until the end of the section. This is achieved by
couple of lseeks(). The most important part is that we reposition
the FD back, so that the position is unchanged from the caller
POV. And until now the final lseek() back to the original
position was done with no check for errors. And I was convinced
that that's okay since nothing can go wrong. However, review
feedback from a related series persuaded me, that it's better to
be safe than sorry. Therefore, lets check if the final lseek()
succeeded and if it doesn't report an error.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>

Commit id '9c5d98fd' missed changing this call to use driver->devs
rather than @driver->devs.

All the pieces are now in place, so we can finally start
using isolation groups to achieve our initial goal, which is
separating hostdevs from emulated PCI devices while keeping
hostdevs that belong to the same host IOMMU group together.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1280542Signed-off-by: NAndrea Bolognani <abologna@redhat.com>
Reviewed-by: NLaine Stump <laine@laine.org>

These rules will make it possible for libvirt to
automatically assign PCI addresses in a way that
respects any isolation constraints devices might
have.
Signed-off-by: NAndrea Bolognani <abologna@redhat.com>
Reviewed-by: NLaine Stump <laine@laine.org>

Isolation groups will eventually allow us to make sure certain
devices, eg. PCI hostdevs, are assigned to guest PCI buses in
a way that guarantees improved isolation, error detection and
recovery for machine types and hypervisors that support it,
eg. pSeries guest on QEMU.

This patch merely defines storage for the new information
we're going to need later on and makes sure it is passed from
the hypervisor driver (QEMU / bhyve) down to the generic PCI
address allocation code.
Signed-off-by: NAndrea Bolognani <abologna@redhat.com>
Reviewed-by: NLaine Stump <laine@laine.org>

Now that we have a bit more control, let's convert our object into
a lockable object and let that magic handle the create and lock/unlock.

This also involves creating a virNodeDeviceEndAPI in order to handle
the object cleanup for API's that use the Add or Find API's in order
to get a locked/reffed object. The EndAPI will unlock and unref the
object returning NULL to indicate to the caller to not use the obj.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

Move the structures to withing virnodedeviceobj.c

Move the typedefs from node_device_conf to virnodedeviceobj.h
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

In an overall effort to privatize access to virNodeDeviceObj and
virNodeDeviceObjList into the virnodedeviceobj module, move the
object list parsing from node_device_driver and replace with a
call to a virnodedeviceobj helper. This follows other similar
APIs/helpers which peruse the object list looking for some specific
data in order to get/return an @device (virNodeDevice) object to
the caller.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

We're about to move the call to nodeDeviceSysfsGetSCSIHostCaps from
node_device_driver into virnodedeviceobj, so move the guts of the code
from the driver specific node_device_linux_sysfs into its own API
since virnodedeviceobj cannot callback into the driver.

Nothing in the code deals with sysfs anyway, as that's hidden by the
various virSCSIHost* and virVHBA* utility function calls.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

Create local @obj and @def for the API's rather than referencing the
devs->objs[i][->def->].  It'll make future patches easier to read.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

Ensure that any function that walks the node device object list is prefixed
by virNodeDeviceObjList.

Also, modify the @filter param name for virNodeDeviceObjListExport to
be @aclfilter.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

In preparation to make things private, make the ->devs be pointers to a
virNodeDeviceObjList and then manage everything inside virnodedeviceobj
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

Create an allocator for the virNodeDeviceObjPtr - include setting up
the mutex, saving the virNodeDeviceDefPtr, and locking the return object.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

A virNodeDeviceObjPtr is an @obj

A virNodeDeviceObjListPtr is a @devs

A virNodeDevicePtr is a @device
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

A virNodeDeviceObjPtr is an @obj

A virNodeDeviceObjListPtr is an @devs
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

 - In testDestroyVport rather than use a cleanup label, just return -1
   immediately since nothing else is needed.

 - In testStoragePoolDestroy, if !privpool, then just return -1 since
   nothing else will happen anyway.

 - Rather than "goto cleanup;" on failure to virNodeDeviceObjFindByName
   an @obj, just return directly.  This then allows the cleanup: label code
   to not have to check "if (obj)" before calling virNodeDeviceObjUnlock.
   This also simplifies some exit logic...

 - In testNodeDeviceObjFindByName use an error: label to handle the failure
   and don't do the ncaps++ within the VIR_STRDUP() source target index.
   Only increment ncaps after success. Easier on eyes at error label too.

 - In testNodeDeviceDestroy use "cleanup" rather than "out" for the goto
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

Rather than passing the object to be removed by reference, pass by value
and then let the caller decide whether or not the object should be free'd
and how to handle the logic afterwards. This includes free'ing the object
and/or setting the local variable to NULL to prevent subsequent unexpected
usage (via something like virNodeDeviceObjRemove in testNodeDeviceDestroy).

For now this function will just handle the remove of the object from the
list for which it was placed during virNodeDeviceObjAssignDef.

This essentially reverts logic from commit id '61148074' that free'd the
device entry on list, set *dev = NULL and returned. Thus fixing a bug in
node_device_hal.c/dev_refresh() which would never call dev_create(udi)
since @dev would have been set to NULL.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

Recent refactors made it so that the function may use uninitialized
pointer, but it actually wanted to use a different variable and value
at all.
Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

This reverts commit b3e71a88.

As it turns out this ends up very badly as the @def could be Free'd
even though it's owned by @obj as a result of the AssignDef.

Create a common API to handle the instantiation path filter lookup.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

New API will be virNWFilterInstantiateFilterInternal as it's called from
the virNWFilterInstantiateFilter and virNWFilterUpdateInstantiateFilter.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

Rename to virNWFilterInstantiateFilterUpdate and alter the callers to not
have one parameter per line.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

Rename to virNWFilterDoInstantiate to better describe the action.

Also fix the @vmuuid parameter to not have the ATTRIBUTE_UNUSED since it
is used in the call to virNWFilterDHCPSnoopReq.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>