Prevent unbounded chains by limiting the recursion depth of
virStorageSourceGetMetadataRecurse to the maximum number of image layers
we limit anyways.
This removes the last use of virStorageSourceGetUniqueIdentifier which
will allow us to delete some crusty old infrastructure which isn't
really needed.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The function is used only inside of the file. We can open-code it and
remove it as it's not very useful.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Add a simpler algorithm converting the JSON array to bitmap so that
virJSONValueGetArrayAsBitmap can be removed in next step.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Both FreeBSD ports and Homebrew on macOS have readline 8.1 now,
and that version contains a correct pkg-config file so the kludge
is no longer necessary.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Follow best practices and add a unsigned int flags parameter to these
new APIs that have not been in a release yet.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
The comments mistakenly say 7.2.0, when they were actually merged during
the 7.3 development cycle.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
While the key is available on public GPG key servers, having it locally
at https://libvirt.org/sources/gpg_key.asc is even better.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
One of the error branches used a plain free where vshCommandFree
was required.
https://bugzilla.redhat.com/show_bug.cgi?id=1943415
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
When calling virNodeDeviceDefineXML() to define a new mediated device,
we call virMdevctlDefine() and then wait for the new device to appear in
the driver's device list before returning. This caused long delays due
to the behavior of nodeDeviceFindNewMediatedDevice(). This function
checks to see if the device is in the list and then waits for 5s before
checking again.
Because mdevctl is relatively slow to query the list of defined
devices[0], the newly-defined device was generally not in the device
list when we first checked. This results in libvirt almost always taking
at least 5s to complete this API call for mediated devices, which is
unacceptable.
In order to avoid this long delay, we resort to a workaround. If the
call to virMdevctlDefine() was successful, we can assume that this new
device will exist the next time we query mdevctl for new devices. So we
simply add this provisional device definition directly to the nodedev
driver's device list and return from the function. At some point in the
future, the mdevctl handler will run and the "official" device will be
processed, which will update the provisional device if any new details
need to be added.
The reason that this is not necessary for virNodeDeviceCreateXML() is
because detecting newly-created (not defined) mdevs happens through
udev instead of mdevctl. And nodeDeviceFindNewMediatedDevice() always
calls 'udevadm settle' before checking to see whether the device is in
the list. This allows us to wait just long enough for all udev events to
be processed, so the device is almost always in the list the first time
we check and so we almost never end up hitting the 5s sleep.
[0] on my machine, 'mdevctl list --defined' took around 0.8s to
complete for only 3 defined mdevs.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
To accomodate re-use of this functionality in a following patch, split
out the processing of an individual mdev definition into a separate
function.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Mention that mdev attribute order is significant.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Calling `mdevctl stop` for a mediated device that is in use by an active
domain will block until that vm exits (or the vm closes the device).
Since the nodedev driver cannot query the hypervisor driver to see
whether any active domains are using the device, we resort to a
workaround that relies on the fact that a vfio group can only be opened
by one user at a time. If we get an EBUSY error when attempting to open
the group file, we assume the device is in use and refuse to try to
destroy that device.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Use the new <uuid> element in the mdev caps to define and start devices
with a specific UUID.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
It will be useful to be able to specify a particular UUID for a mediated
device when defining the node device. To accomodate that, allow this to
be specified in the xml schema. This patch also parses and formats that
value to the xml, but does not yet use it.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
This virsh command maps to virNodeDeviceCreate(), which starts a node
device that has been previously defined by virNodeDeviceDefineXML().
This is only supported for mediated devices.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
This new API function provides a way to start a persistently-defined
mediate device that was defined by virNodeDeviceDefineXML() (or one that
was defined externally via mdevctl)
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Add a virsh command that maps to virNodeDeviceUndefine().
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Several functions accept providing a node device by name or by wwnn,wwpn
pair. Extract the logic to do this into a function that can be used by
both callers.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
This interface allows you to undefine a persistently defined (but
inactive) mediated devices. It is implemented via 'mdevctl'
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
mdevctl 'stop' and 'undefine' commands take the same uuid parameter, so
refactor the test infrastructure to share common implementation for both
of these commands. The 'undefine' command will be introduced in a
following patch.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Add a virsh command that maps to virNodeDeviceDefineXML().
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Now that we can filter active and inactive node devices in
virConnectListAllNodeDevices(), add these switches to the virsh command.
Eventual output (once everything is hooked up):
virsh # nodedev-list --cap mdev
mdev_bd2ea955_3402_4252_8c17_7468083a0f26
virsh # nodedev-list --inactive --cap mdev
mdev_07d8b8b0_7e04_4c0f_97ed_9214ce12723c
mdev_927c040f_ae7d_4a35_966e_286ba6ebbe1c
virsh # nodedev-list --all --cap mdev
mdev_07d8b8b0_7e04_4c0f_97ed_9214ce12723c
mdev_927c040f_ae7d_4a35_966e_286ba6ebbe1c
mdev_bd2ea955_3402_4252_8c17_7468083a0f26
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
With mediated devices, we can now define persistent node devices that
can be started and stopped. In order to take advantage of this, we need
an API to define new node devices.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Abstract out the function used to generate the commandline for 'mdevctl
start' since they take the same arguments. Add tests to ensure that
we're generating the command properly.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
We need to query mdevctl for changes to device definitions since an
administrator can define new devices by executing mdevctl outside of
libvirt.
In the future, mdevctl may add a way to signal device add/remove via
events, but for now we resort to a bit of a workaround: monitoring the
mdevctl config directory for changes to files. When a change is
detected, we query mdevctl and update our device list. The mdevctl
querying is handled in a throwaway thread, and these threads are
synchronized with a mutex.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
mdevctl does not currently provide any events when the list of defined
devices changes, so we will need to poll mdevctl for the list of defined
devices periodically. When a mediated device no longer exists from one
iteration to the next, we need to treat it as an "undefine" event.
When we get such an event, we remove the device from the list if it's
not active. Otherwise, we simply mark it as non-persistent.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
When a mediated device is stopped or undefined by an application outside
of libvirt, we need to remove it from our list of node devices within
libvirt. This patch introduces virNodeDeviceObjListRemoveLocked() and
virNodeDeviceObjListForEachRemove() (which are analogous to other types
of object lists in libvirt) to facilitate that. They will be used in
coming commits.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
At startup, query devices that are defined by 'mdevctl' and add them to
the node device list.
This adds a complication: we now have two potential sources of
information for a node device:
- udev for all devices and for activated mediated devices
- mdevctl for persistent mediated devices
Unfortunately, neither backend returns full information for a mediated
device. For example, if a persistent mediated device in the list (with
information provided from mdevctl) is 'started', that same device will
now be detected by udev. If we simply overwrite the existing device
definition with the new one provided by the udev backend, we will lose
extra information that was provided by mdevctl (e.g. attributes, etc).
To avoid this, make sure to copy the extra information into the new
device definition.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Since a mediated device can be persistently defined by the mdevctl
backend, we need additional lifecycle events beyond CREATED/DELETED to
indicate that e.g. the device has been stopped but the device definition
still exists.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Consistent with other objects (e.g. virDomainObj), add a field to
indicate whether the node device is persistent or transient.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
This adds an internal API to query for persistent mediated devices
that are defined by mdevctl. Upcoming commits will make use of this
information.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
This function will parse the list of mediated devices that are returned
by mdevctl and convert it into our internal node device representation.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
In order to be able to pass a string as user data to the test function,
change the DO_TEST_FULL() macro to expect a pointer and pass it directly
to virTestRun(). Previously we expected the caller to pass a struct
variable and then passed the address of that to virTestRun().
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Expose a helper function that can be used by udev and mdevctl to
generate device names for node devices.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
It doesn't make sense to list all of the flag values in the function
documentation. This is unnecessary duplication, we already refer to the
enum type. Also, remove reference to exclusive groups of flags, since
that does not apply to this API.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Add two flag values for virConnectListAllNodeDevices() so that we can
list only node devices that are active or inactive.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
we will be able to define mediated devices that can be started or
stopped, so we need to be able to indicate whether the device is active
or not, similar to other resources (storage pools, domains, etc.)
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
The macro should not have a trailing semicolon so that when the macro is
used, the user can add a semicolon themselves.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
When an mdevctl command fails, there is not much information available
to the user about why it failed. This is partly because we were not
making use of the error message that mdevctl itself prints upon failure.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
This makes it possible to enable stable NIC device names in most modern
Linux distros.
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This property is exposed by QEMU on any PCI device, but we have to pick
some specific device(s) to probe it against. We expect that at least one
of the virtio devices will be present, so probe against them.
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The compiler can more easily optimize a switch, and more importantly can
also warn when new address types are added which are not handled.
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
