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QEMU's "reconnect" option of "-netdev stream" tells QEMU to
periodically (period is given in seconds as an argument to the option)
attempt to reconnect to the same passt socket to which it had
originally connected to. This is useful in cases where the passt
process terminates, and libvirtd starts a new passt process in its
place (which doesn't happen yet, but will happen automatically after
an upcoming patch in this series).
Since there is no real hueristic for determining the "best" value of
the reconnect interval, rather than clutter up config with a knob that
nobody knows how to properly twiddle, we just set the reconnect timer
to 5 seconds.
"-netdev stream" first appeared in QEMU 7.2.0, but the reconnect
option won't be available until QEMU 8.0.0, so we need to check QEMU
capabilities just in case someone is using QEMU 7.2.0 (and thus can
support passt backend, but not reconnect)
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Detect that the 'stream' netdev backend supports reconnecting.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
qemuPasstStart() already logs any error that occurs, so having the
caller log a generic error message only serves to obscure the actual
problem.
Fixes: a56f0168d5
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
In commit 5af6134e I had added a new capability that is true if QEMU
allows "-netdev stream", but somehow neglected to actually check it in
commit a56f0168d when hooking up passt support to qemu. This isn't
catastrophic, since QEMU itself will still report an error, but that
error isn't as easy to understand as a libvirt-generated error.
Fixes: a56f0168d5
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Just like it can't remove its own PID files, passt can't unlink its
own socket upon exit (unless the initialisation fails), because it
has no access to the filesystem at runtime.
Remove the socket file in qemuPasstKill().
Fixes: a56f0168d5 ("qemu: hook up passt config to qemu domains")
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: Laine Stump <laine@redhat.com>
Changing any of the attributes of an <interface>'s <backend> would
require removing and re-adding the interface for the new setting to
take effect, so fail any update-device that changes anything in
<backend>
Resolves: https://bugzilla.redhat.com/2169245
Signed-off-by: Laine Stump <laine@redhat.com>
When user creates external snapshot with making only memory snapshot
without any disks deleting that snapshot failed without reporting any
meaningful error.
The issue is that the qemuSnapshotDeleteExternalPrepare function
returns NULL because the returned list is empty. This will not change
so to make it clear if the function fails or not return int instead and
have another parameter where we can pass the list.
With the fixed memory snapshot deletion it will now correctly delete
memory only snapshot as well.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2170826
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
When deleting external snapshot we should remove the memory snapshot
file as well.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
'reconnect' parameter doesn't pass to qemu properly when
hotplug vhost-user device to vm. Fix this by making
'reconnect' to get correct value.
Signed-off-by: Zhenguo Yao <yaozhenguo1@gmail.com>
Reviewed-by: Jonathon Jongsma <jjongsma@redhat.com>
It makes sense to accept pvpanic-pci also without specified PCI
address and assign one if possible.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1961326
Signed-off-by: Kristina Hanicova <khanicov@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
This capability detects the availability of the pvpanic-pci
device that is required in order to use pvpanic on Arm (original
pvpanic is an emulated ISA device, for which Arm does not have
support).
Signed-off-by: Kristina Hanicova <khanicov@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
It was used briefly and subsequently removed in 3592b81c4c.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
There is no markup equivalent for any of the <s/> or <del/> HTML tags, so this
is the only thing I came up with and it looks like it works.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
The syntax-check rule that calls flake8 on Python scripts
expects this to be the case, and it's the best practice anyway.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Python scripts should always invoked the interpreter through
env(1) to ensure that they work on macOS and the BSDs, and at
this point not explicitly asking for Python 3 doesn't really
make sense.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
The 'newapi.xsl' stylesheet was referencing non-existing paths to the
XML files holding ACL permission flags for individual APIs. Additionally
the 'document()' XSL function doesn't even allow concatenation of the
path as it was done via '{$builddir}/src..', but requires either direct
argument or use of the 'concat()' function.
This meant that the 'acls' variable was always empty and thus none of
our API documentation was actually generated with the 'acl' section.
Fix it by passing the path to the XML via an argument to the stylesheet
as the files differ based on which document is being generated.
Since the 'admin' API does not have ACL we need to handle it separately
now in the build system.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
It's not trivial to figure out the ACL object name from our
documentation. Add it above the table outlining existing permissions.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Both the object name and permission name in ACL use '-' instead of '_'
separator when referring to them in the docs or even when used inside of
polkit. Unfortunately the generators used for generating our docs don't
honour this in certain cases which would result in broken names in the
API docs (once they will be generated).
Rename both object and permission name to use dash and reflect that in
the anchor names in the documentation.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
In selinux driver there's virSecuritySELinuxSetFileconImpl()
which is responsible for actual setting of SELinux label on given
file and handling possible failures. In fhe failure handling code
we decide whether failure is fatal or not. But there is a bug:
depending on SELinux mode (Permissive vs. Enforcing) the ENOENT
is either ignored or considered fatal. This not correct - ENOENT
must always be fatal for couple of reasons:
- In virSecurityStackTransactionCommit() the seclabels are set
for individual secdrivers (e.g. SELinux first and then DAC),
but if one secdriver succeeds and another one fails, then no
rollback is performed for the successful one leaking remembered
labels.
- QEMU would fail opening the file anyways (if neither of
secdrivers reported error and thus cancelled domain startup)
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2004850
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
In virSecuritySELinuxSetFileconImpl() we have code that handles
setfilecon_raw() failure. The code consists of two blocks: one
for dealing with shared filesystem like NFS (errno is ENOTSUP or
EROFS) and the other block that's dealing with EPERM for
privileged daemon. Well, the order of these two blocks is a bit
confusing because the comment above them mentions the NFS case
but EPERM block follows. Swap these two blocks to make it less
confusing.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
The way we start passt currently is: we use
virCommandSetPidFile() to use our virCommand machinery to acquire
the PID file and leak opened FD into passt. Then, we use
virPidFile*() APIs to read the PID file (which is needed when
placing it into CGroups or killing it). But this does not fly
really because passt daemonizes itself. Thus the process we
started dies soon and thus the PID file is closed and unlocked.
We could work around this by passing '--foreground' argument, but
that weakens passt as it can't create new PID namespace (because
it doesn't fork()).
The solution is to let passt write the PID file, but since it
does not lock the file and closes it as soon as it is written, we
have to switch to those virPidFile APIs which don't expect PID
file to be locked.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Laine Stump <laine@redhat.com>
There are two places where we kill passt:
1) qemuPasstStop() - called transitively from qemuProcessStop(),
2) qemuPasstStart() - after failed start.
Now, the code from 2) lack error preservation (so if there's
another error during cleanup we might overwrite the original
error). Therefore, move the internals of qemuPasstStop() into a
separate function and call it from both places.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Laine Stump <laine@redhat.com>
When starting passt, it may write something onto its stderr
(convincing it to print even more is addressed later). Pass this
string we read to user.
Since we're not daemonizing passt anymore (see previous commit),
we can let virCommand module do all the heavy lifting and switch
to virCommandSetErrorBuffer() instead of reading error from an
FD.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: Laine Stump <laine@redhat.com>
When passt is started, it daemonizes itself by default. There's
no point in having our virCommand module daemonize it too.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: Laine Stump <laine@redhat.com>
Certain APIs are allowed also without authentication but the ACL page
didn't outline which. Generate a new column with the information.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Fetching whether a node-device is marked for autostart can be allowed
from read-only connections similarly to other objects.
Fixes: c6607a25b9
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
For all other objects we allow the 'read' permission for anonymous
users. In fact the idea is to allow all permissions users using the
readonly connection would have.
This impacts the following APIs (in terms of RPC procedure names):
$ git grep -A 3 node_device:read | grep REMOTE
src/remote/remote_protocol.x- REMOTE_PROC_NODE_DEVICE_GET_XML_DESC = 114,
src/remote/remote_protocol.x- REMOTE_PROC_NODE_DEVICE_GET_PARENT = 115,
src/remote/remote_protocol.x- REMOTE_PROC_NODE_DEVICE_NUM_OF_CAPS = 116,
src/remote/remote_protocol.x- REMOTE_PROC_NODE_DEVICE_LIST_CAPS = 117,
src/remote/remote_protocol.x- REMOTE_PROC_NODE_DEVICE_GET_AUTOSTART = 433,
src/remote/remote_protocol.x- REMOTE_PROC_NODE_DEVICE_IS_PERSISTENT = 435,
src/remote/remote_protocol.x- REMOTE_PROC_NODE_DEVICE_IS_ACTIVE = 436,
Fixes: a93cd08f
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
The way setting up CGroups for external helpers work, is:
qemuExtDevicesHasDevice() is called first to determine whether
there is a helper process running, the CGroup controller is
created and then qemuExtDevicesSetupCgroup() is called to place
helpers into the CGroup. But when one reads just
qemuExtDevicesSetupCgroup() it's easy to miss this hidden logic.
Therefore, add a warning at the beginning of the function.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Laine Stump <laine@redhat.com>
If qemuPasstGetPid() fails, or the passt's PID is -1 then
qemuPasstSetupCgroup() returns early without any error message
set. Report an appropriate error.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Laine Stump <laine@redhat.com>
We can have external helper processes running for domain
<interface/> too (e.g. slirp or passt). But this is not reflected
in qemuExtDevicesHasDevice() which simply ignores these.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Laine Stump <laine@redhat.com>
This reverts commit 0c4e716835.
This patch was pushed by my mistake. Even though it got ACKed on
the list, I've raised couple of issues with it. They will be
fixed in next commits.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Laine Stump <laine@redhat.com>
Check both that a file is referenced from our pages and also that pages
reference existing images.
The mode for dumping external references now also dumps images.
'--ignore-image' can be used repeatedly to suppress errors for specific
images.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
The logo directory wasn't really referenced from anywhere. Additionally
there wasn't any reasonable index for all the image files which we have.
Turn the README file into rST and display the images it references. Link
to the new index file from the docs page.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
The images are referenced from '../images/' but the document is two
layers deep thus '../../images' needs to be used
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Our documentation has pages for 4 go modules, 2 current and 2 obsolete
ones, but points only to one of them and directly to golang's docs page.
Add a sub-page where all 4 sub-pages for the modules are linked.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
The manpages for 'virt-pki-query-dn', 'virt-qemu-qmp-proxy' and
'virt-ssh-helper.rst' were not referenced from the manpage index or any
other place.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Now that we have the source file name as a custom attribute we can use
it to report which file actually needs to be edited to fix the error:
ERROR: 'docs/uri.rst': broken link to: 'drvqemu.html#exaple'
rather than:
broken link targets:
docs/uri.html broken link: drvqemu.html#exaple
which pointed to file which does not exist in the source directory.
This also allows us to delete all the relative path handling needed to
report at least somewhat user-legible errors before.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Force users to pass the path to the root of the webpage the script
should check. The script lives in a different subdirectory so the
default of the current directory doesn't make much sense.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
