Introduces the vfio-ccw model for mediated devices and prime vfio-ccw
devices such that CCW address will be generated.
Alters the qemuxml2xmltest for testing a basic mdev device using vfio-ccw.
Signed-off-by: Shalini Chellathurai Saroja <shalini@linux.vnet.ibm.com>
Reviewed-by: Bjoern Walk <bwalk@linux.ibm.com>
Reviewed-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Reviewed-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com>
Reviewed-by: Stefan Zimmermann <stzi@linux.ibm.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
Add the function virHostdevIsMdevDevice() which detects whether a
hostdev is a mediated device or not. Also, replace all existing
conditionals.
Signed-off-by: Shalini Chellathurai Saroja <shalini@linux.vnet.ibm.com>
Reviewed-by: Bjoern Walk <bwalk@linux.ibm.com>
Reviewed-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
Let us introduce the capability vfio-ccw for supporting the basic
channel I/O passthrough, which have been introduced in QEMU 2.10. The
current focus is to support dasd-eckd (cu_type/dev_type = 0x3990/0x3390)
as the target device.
Let us also introduce the capability QEMU_CAPS_CCW_CSSID_UNRESTRICTED
for virtual-css-bridge. This capability is based on the
cssid-unrestricted property which exists if QEMU no longer enforces
cssid restrictions based on ccw device types.
Vfio-ccw capability is dependent on the hidden virtual-css-bridge, so
that we are able to probe for the cssid-unrestriced property to make
sure the devices are visible to non-mcss-e enabled guests.
Signed-off-by: Shalini Chellathurai Saroja <shalini@linux.vnet.ibm.com>
Reviewed-by: Bjoern Walk <bwalk@linux.ibm.com>
Reviewed-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
Let us introduce the capability QEMU_CAPS_CCW for virtual-css-bridge
and replace QEMU_CAPS_VIRTIO_CCW with QEMU_CAPS_CCW in code segments
which identify support for ccw devices.
The virtual-css-bridge is part of the ccw support introduced in QEMU 2.7.
The QEMU_CAPS_CCW capability is based on the existence of the QEMU type.
Let us also add the capability QEMU_CAPS_CCW to the tests which
require support for ccw devices.
Signed-off-by: Shalini Chellathurai Saroja <shalini@linux.vnet.ibm.com>
Reviewed-by: Bjoern Walk <bwalk@linux.ibm.com>
Reviewed-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
Ditch the use of gnulib's digest functions in favor of GnuTLS,
which might be more likely to get FIPS-certified.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
A function that keeps the hash in binary form instead of converting
it to human-readable hexadecimal form.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
The callers needing to know the size of the resulting digest
rely on _DIGEST_SIZE constants from gnulib.
Introduce VIR_CRYPTO_HASH_SIZE_ constants to remove the dependency.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
numpy (needed by cgal) started having the same issue with
linking as python, which makes upgrade and thus the entire
build fail on macOS.
Instead of playing more tricks with linking/unlinking, just
uninstall the problematic packages (and those dragging them
in) before doing anything else.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1480668
QEMU has this new feature memory-backend-file.discard-data=yes
which is a nifty optimization. Basically, when qemu is quitting
or on memory hotplug it calls munmap() and close() on the file
that is backing the memory. However, this does not mean kernel
won't stop touching that part of memory. It still might. With
this feature enabled we tell kernel: "we don't need this memory
nor data stored in it". This makes kernel drop the memory
immediately without trying to sync memory with the mapped file.
Unfortunately, this cannot be turned on by default because we
can't be sure when users really don't care about what happens to
data after qemu dies. So it has to be opt-in. As usual, there are
three places where one can configure memory attributes. This
patch adds the feature to all of them.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
QEMU has possibility to call madvise(.., MADV_REMOVE) in some
cases. Expose this feature to users by new element/attribute
discard.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
At the same time convert the code to use virXMLFormatElement.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This capability tracks if memory-backend-file has discard-data
attribute or not.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This capability tracks if qemu has "qom-list-properties" monitor
command.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Now that we've gotten rid of misleading names we can introduce
qemuMonitorGetObjectProps() function which queries -object
properties. Again, some parts of code can be reused.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The code that processes list of device properties is going to be
reused. Therefore put it into a separate function.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The <memoryBacking><locked/></memoryBacking> element will now pass the
wired (-S) flag to the bhyve command.
Signed-off-by: Fabian Freyer <fabian.freyer@physik.tu-berlin.de>
Reviewed-by: Roman Bogorodskiy <bogorodskiy@gmail.com>
Strongly recommend against use of the log_levels setting since it
creates overly verbose logs and has a serious performance impact.
Describe the log filter syntax better and mention use of shell
glob syntax. Also provide more realistic example of good settings
to use. The libvirtd example is biased towards QEMU, but when the
drivers split off each daemon can get its own more appropriate
example.
Reviewed-by: John Ferlan <jferlan@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Rather than specialcasing handling of the '*' character, use fnmatch()
to get normal shell wildcard syntax, as described in 'man glob(7)'.
To get an indication of the performance impact of using globs instead
of plain string matches, a test program was written. The list of all
260 log categories was extracted from the source. Then a typical log
filters setup was picked by creating an array of the strings "qemu",
"security", "util", "cgroup", "event", "object". Every filter string
was matched against every log category. Timing information showed that
using strstr() this took 8 microseconds, while fnmatch() took 114
microseconds.
IOW, fnmatch is 14 times slower than our existing strstr check. These
numbers show a worst case scenario that will never be hit, because it
is rare that every log category would have data output. The log category
matches are cached, so each category is only checked once no matter how
many log statements are emitted. IOW despite being slower, this will
be lost in the noise and have no consequence on real world logging
performance.
Reviewed-by: John Ferlan <jferlan@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
There's this macro virBufferSetChildIndent which sets offset of
child buffer from given parent buffer. However, it is calling
virBufferAdjustIndent() which only adds adjustment instead of
calling virBufferSetIndent() which clears out any adjustment
previously set.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
After version 0.7.5, libssh deprecated the function scope
ssh_get_publickey() and moved to ssh_get_server_publickey(). So, Libvirt
is failing to compile using this new function name.
Signed-off-by: Julio Faracco <jcfaracco@gmail.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
This commit adds some checks inside libssh m4 checking to verify if
ssh_get_server_publickey is available. This new function scope replaces
the old ssh_get_publickey() from libssh 0.7.5 and below. Assuming that
some distros are not showing the right version of libssh. This is a
simple way to check which function is available.
Signed-off-by: Julio Faracco <jcfaracco@gmail.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
If we are the last one to use pr-manager object we need to remove
it and also kill the qemu-pr-helper process.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
When attaching a disk that requires pr-manager we might need to
plug the pr-manager object and start the pr-helper process.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
Before we exec() qemu we have to spawn pr-helper processes for
all managed reservations (well, technically there can only one).
The only caveat there is that we should place the process into
the same namespace and cgroup as qemu (so that it shares the same
view of the system). But we can do that only after we've forked.
That means calling the setup function between fork() and exec().
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
Just like we allow users overriding path to bridge-helper
detected at compile time we can allow them to override path to
qemu-pr-helper.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
Just like in previous commit, qemu-pr-helper might want to open
/dev/mapper/control under certain circumstances. Therefore we
have to allow it in cgroups.
The change virdevmapper.c might look spurious but it isn't. After
6dd84f6850 any path that we're allowing in deivces CGroup is
subject to virDevMapperGetTargets() inspection. And libdevmapper
returns ENXIO for the path from subject.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
If qemu-pr-helper is compiled with multipath support the first
thing it does is open /dev/mapper/control. Since we're going
to be running it inside qemu namespace we need to create it
there. Unfortunately, we don't know if it was compiled with or
without multipath so we have to create it anyway.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
For command line we need two things:
1) -object pr-manager-helper,id=$alias,path=$socketPath
2) -drive file.pr-manager=$alias
In -object pr-manager-helper we tell qemu which socket to connect
to, then in -drive file-pr-manager we just reference the object
the drive in question should use.
For managed PR helper the alias is always "pr-helper0" and socket
path "${vm->priv->libDir}/pr-helper0.sock".
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
The capability tracks if qemu has pr-manager-helper object. At
this time don't actually detect if qemu has the capability. Not
just yet. Only after the code is written the feature will be
enabled.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
Couple of reasons for that:
a) there's no monitor command to change path where the pr-helper
connects to, or
b) there's no monitor command to introduce a new pr-helper for a
disk that already exists.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
This is a definition that holds information on SCSI persistent
reservation settings. The XML part looks like this:
<reservations enabled='yes' managed='no'>
<source type='unix' path='/path/to/qemu-pr-helper.sock' mode='client'/>
</reservations>
If @managed is set to 'yes' then the <source/> is not parsed.
This design was agreed on here:
https://www.redhat.com/archives/libvir-list/2017-November/msg01005.html
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
Rather than have virJSONValueArraySize return a -1 when the input
is not an array and then splat an error message, let's check for
an array before calling and then change the return to be a size_t
instead of ssize_t.
That means using the helper virJSONValueIsArray as well as using a
more generic error message such as "Malformed <something> array".
In some cases we can remove stack variables and when we cannot,
those variables should be size_t not ssize_t. Alter a few references
of if (!value) to be if (value == 0) instead as well.
Some callers can already assume an array is being worked on based
on the previous call, so there's less to do.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
The pointer to the qemu driver is already included in domain object's
private data, so does not need to be passed as yet another parameter
when the domain object is already passed.
Also removes parameter 'driver' from functions which had it just because of
qemuBlockJobUpdate.
Signed-off-by: Roland Schulz <schullzroll@gmail.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
