The comment was actually wrong as
https://www.freedesktop.org/software/systemd/man/udev_new.html#
mentions that on failure NULL is returned. Also the same return value
is checked in src/interface/interface_backend_udev.c already.
Signed-off-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com>
QEMU 2.9.0 is not released yet but it's close to its release and
we need this data to implement new features that will be in
that release.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
When enabling virgl, qemu opens /dev/dri/render*. So far, we are
not allowing that in devices CGroup nor creating the file in
domain's namespace and thus requiring users to set the paths in
qemu.conf. This, however, is suboptimal as it allows access to
ALL qemu processes even those which don't have virgl configured.
Now that we have a way to specify render node that qemu will use
we can be more cautious and enable just that.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
So far, qemuDomainGetHostdevPath has no knowledge of the reasong
it is called and thus reports /dev/vfio/vfio for every VFIO
backed device. This is suboptimal, as we want it to:
a) report /dev/vfio/vfio on every addition or domain startup
b) report /dev/vfio/vfio only on last VFIO device being unplugged
If a domain is being stopped then namespace and CGroup die with
it so no need to worry about that. I mean, even when a domain
that's exiting has more than one VFIO devices assigned to it,
this function does not clean /dev/vfio/vfio in CGroup nor in the
namespace. But that doesn't matter.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
So far, we are allowing /dev/vfio/vfio in the devices cgroup
unconditionally (and creating it in the namespace too). Even if
domain has no hostdev assignment configured. This is potential
security hole. Therefore, when starting the domain (or
hotplugging a hostdev) create & allow /dev/vfio/vfio too (if
needed).
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Since these two functions are nearly identical (with
qemuSetupHostdevCgroup actually calling virCgroupAllowDevicePath)
we can have one function call the other and thus de-duplicate
some code.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
There's no need for this function. Currently it is passed as a
callback to virSCSIVHostDeviceFileIterate(). However, SCSI host
devices have just one file path. Therefore we can mimic approach
used in qemuDomainGetHostdevPath() to get path and call
virCgroupAllowDevicePath() directly.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
There's no need for this function. Currently it is passed as a
callback to virSCSIDeviceFileIterate(). However, SCSI devices
have just one file path. Therefore we can mimic approach used in
qemuDomainGetHostdevPath() to get path and call
virCgroupAllowDevicePath() directly.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
There's no need for this function. Currently it is passed as a
callback to virUSBDeviceFileIterate(). However, USB devices have
just one file path. Therefore we can mimic approach used in
qemuDomainGetHostdevPath() to get path and call
virCgroupAllowDevicePath() directly.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Add a test that allows providing the parent fabric_wwn in the input XML
in order to create the vHBA.
This also fixes a mixed setting of the fabric_wwn field from the read
test driver XML strings.
Rework the code to perform the various searches by parent, parent_wwnn/
parent_wwpn, parent_fabric_wwn, or vport capable in order to return the
'parent_host' number that is vHBA capable.
The former virNodeDeviceGetParentHost is renamed to add the ByParent
on it fixes an issue where if no parent was supplied in the XML to
create the vHBA, then virNodeDeviceFindByName was called with a NULL
second parameter which had bad results.
The reworked code will make the various calls to fetch the NPIV host
by the passed parameter options or if none are provided find a vport
capable NPIV HBA to perform the create. If the call is from the delete
path, then this option won't be allowed.
Each of virNodeDeviceGetParentHostBy* functions is now static, so
remove them external definitions.
A secondary benefit of this is the test_driver now can make use of
the new API to add some new tests to test the various creation options.
While perhaps improbable, it could be possible that after finding our
object that another thread running essentially in parallel could attempt
to delete the same vHBA.
So rather than dropping the lock right after finding the object, keep
the lock around while we drop the object lock and work on deleting the
object. Once the delete occurs we can safely drop the driver lock again.
Cleanup some of the usage of cleanup instead out for the goto label.
Add a test that will mimic creation and destruction of a vHBA
by using node device XML. The design will allow for testing the
multiple mechanisms.
The first test uses just <parent> in the node device XML. This is
somewhat similar to the existing objecteventtest, except that this
test will not provide input wwnn/wwpn's (similar to how the process
is described for the the libvirt wiki).
This requires mocking the virRandomGenerateWWN since parsing the
input XML (virNodeDevCapSCSIHostParseXML) requires either a provided
wwnn/wwpn in the XML or the ability to randomly generate the wwnn/wwpn.
Create a virscsihost.c and place the functions there. That removes the
last #ifdef __linux__ from virutil.c.
Take the opporunity to also change the function names and in one case
the parameters slightly
Use the new virNodeDeviceGetParentName instead. Modify the callers to
build the node device scsi_host# name string in order to call the new
function so that proper lookup occurs.
Rather than have them mixed in with the virutil apis, create a separate
virvhba.c module and move the vHBA related calls into there. Soon there
will be more added.
Also modify the names of the functions and some arguments to be more
indicative of what is really happening. Adjust the callers respectively.
While I was changing fchosttest, rather than the non-descriptive names
test1...test6, rename them to match what the test is doing.
Commit id '666bee3' made fabric_name optional; however, if fabric name
was present, then a leak would occur.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Modify the code to react more like a real HBA -> vHBA creation.
Currently the code would just modify the input XML definition to
set the name to a wwpn and then modify the scsi_host capability
entry for the defintion to change the scsi_host# and unique_id
before adding that into the node device.
This patch does things a bit better. It finds and copies a known
existing vHBA (scsi_host11) in the node_device database and modifies
that definition to change the name to scsi_host12 and set the wwnn/
wwpn to what the input XML would expect before adding the def to the
node device object list.
Then rather than create a returned "dev" using the (poorly) mocked
name - perform the lookup using the new device name.
Rather than inline the dummy creation of a vHBA to add to the node
devices - create a helper to do that work.
Also just tidy up a couple of things while at it...
Predefine a second NPIV capable HBA as well as a vHBA using the first
NPIV capable HBA. This will allow for a mechanism to perform more
realistic create vHBA testing.
Alter "test-scsi-host-vport" to be "scsi_host1" to match the real
environment. This is the vport capable HBA - IOW the NPIV device.
Add more fields to scsi_host1 as well.
Alter the XML being used by the objecttest to create a vHBA in order
to match the scsi_host1 parent name and to use validateable wwnn/wwpn.
This will allow for realistic testing.
Build fails with:
conf/node_device_conf.c:825:62: error: comparison of unsigned enum expression < 0 is always false [-Werror,-Wtautological-compare]
if ((data->drm.type = virNodeDevDRMTypeFromString(type)) < 0) {
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~
conf/node_device_conf.c:1801:59: error: comparison of unsigned enum expression < 0 is always false [-Werror,-Wtautological-compare]
if ((type = virNodeDevDevnodeTypeFromString(tmp)) < 0) {
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~
2 errors generated.
Fix by using intermediate variable to store the result similarly
to how it's done for other FromString* calls.
After 7f1bdec5fa our nodedev driver is capable of
determining DRM devices (DRM stands for Direct Render Manager not
Digital rights management). There is still one bit missing
though: virConnectListAllNodeDevices() is capable of listing
either all devices or just those with specified capability. Well,
DRM capability is missing there.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Add a new attribute 'rendernode' to <gl> spice element.
Give it to QEMU if qemu supports it (queued for 2.9).
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Add a new 'drm' capability for Direct Rendering Manager (DRM) devices,
providing device type information.
Teach the udev backend to populate those devices.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Add new <devnode> top-level <device> element, that list the associated
/dev files. Distinguish the main /dev name from symlinks with a 'type'
attribute of value 'dev' or 'symlink'.
Update a test to check XML schema, and actually add it to the test list
since it was missing.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
When the 'parent' was added to the virNodeDevicePtr structure
by commit id 'e8a4ea75a' the 'parent' field was not properly filled
in when a virGetNodeDevice call was made within driver/config code.
Only the device name was ever filled in. Fetching the parent required
a second trip via virNodeDeviceGetParent into the node device lookup
code was required in order to retrieve the specific parent field (and
still the parent field was never filled in although it was free'd).
Since we have the data when we initially call virGetNodeDevice from
within driver/node_config code - let's just fill in the parent field
as well for anyone that wants it without requiring another trip into
the node_device lookup just to get the parent.
This will allow API's such as virConnectListAllNodeDevices,
virNodeDeviceLookupByName, and virNodeDeviceLookupSCSIHostByWWN
to retrieve both name and parent in the returned virNodeDevicePtr.
Signed-off-by: John Ferlan <jferlan@redhat.com>
As discussed here [0][1] Coverity reported two issues:
- On libxlDomainMigrationPrepareTunnel3 @@mig will be leaked on failures
after sucessfull call libxlDomainMigrationPrepareAny hence we free it.
Setting mig = NULL after @mig is assigned plus adding libxlMigrationCookieFree
on error paths addresses the issue. In case virThreadCreate fails,
unref of args frees the cookie on dispose function (libxlMigrationDstArgsDispose)
- On libxlMigrationStartTunnel @tc would be leaked.
Fixed by correctly saving the newly allocated @tc onto @tnl such that
libxlMigrationStopTunnel would free it up.
[0] https://www.redhat.com/archives/libvir-list/2017-February/msg00791.html
[1] https://www.redhat.com/archives/libvir-list/2017-February/msg00833.html
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Before 9c17d665fd (v1.3.2 - I know, right?) it was possible to
have the following interface configuration:
<interface type='ethernet'/>
<script path=''/>
</interface>
This resulted in -netdev tap,script=,.. Fortunately, qemu helped
us to get away with this as it just ignored the empty script
path. However, after the commit mentioned above it's libvirtd
who is executing the script. Unfortunately without special
case-ing empty script path.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Currently disk names do not follow the
(regex) /^[fhv]d[a-z]+[0-9]*$/ completely
and hence one can assign disk names like
vd2 etc. This patch ensures that the
disk names follow the regex mentioned.
This patch also adds a testcase.
Signed-off-by: Nitesh Konkar <nitkon12@linux.vnet.ibm.com>
Commit 4ab0c959 fixed a memory leak in libxlDriverGetDom0MaxmemConf
but introduced a potential double free of mem_tokens
*** Error in `/usr/sbin/libvirtd': double free or corruption (out):
0x00007fffc808cfd0 ***
Avoid double free by setting mem_tokens to NULL after calling
virStringListFree.
Tunnelled migration doesn't require any extra network connections
beside the libvirt daemon. It's capable of strong encryption and the
default option of openstack-nova.
This patch adds the tunnelled migration(Tunnel3params) support to
libxl. On the source side, the data flow is:
* libxlDoMigrateSend() -> pipe libxlTunnel3MigrationFunc() polls pipe
* out and then write to dest stream.
While on the destination side:
* Stream -> pipe -> 'recvfd of libxlDomainStartRestore'
The usage is the same as p2p migration, execpt adding one extra
'--tunnelled' to the libvirt p2p migration command.
Signed-off-by: Bob Liu <bob.liu@oracle.com>
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
The newly introduced function libxlDomainMigrationPrepareAny
will be shared between P2P and tunnelled variations.
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
This function is returning a boolean therefore check for '< 0'
makes no sense. It should have been
'!qemuDomainNamespaceAvailable'.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
The bare fact that mnt namespace is available is not enough for
us to allow/enable qemu namespaces feature. There are other
requirements: we must copy all the ACL & SELinux labels otherwise
we might grant access that is administratively forbidden or vice
versa.
At the same time, the check for namespace prerequisites is moved
from domain startup time to qemu.conf parser as it doesn't make
much sense to allow users to start misconfigured libvirt just to
find out they can't start a single domain.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
If the apparmor security driver is loaded/enabled and domain config
contains a <seclabel> element whose type attribute is not 'apparmor',
starting the domain fails when attempting to label resources such
as tap FDs.
Many of the apparmor driver entry points attempt to retrieve the
apparmor security label from the domain def, returning failure if
not found. Functions such as AppArmorSetFDLabel fail even though
domain config contains an explicit 'none' secuirty driver, e.g.
<seclabel type='none' model='none'/>
Change the entry points to succeed if the domain config <seclabel>
is not apparmor. This matches the behavior of the selinux driver.
