Currently some, but not all, methods have a call to the
xdr_free function, for the 'ret' variable. This is done
on methods where there are complex structs containing
allocated memory. In other cases the structs contain
allocated memory, but the pointer is stolen, so xdr_free
is not called. In other cases no allocated memory is
present, so xdr_free.
This is hard to reason about, because the definition of
the struct is not visible in the client stubs.
Switch to use g_auto() for the 'ret' variable, which
means 'xdr_free' is always going to be called. Some
places now need to use g_steal_pointer as a result.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Currently some, but not all, methods have a call to the
xdr_free function, for the 'ret' variable. This is done
on methods where there are complex structs containing
allocated memory. In other cases the structs contain
allocated memory, but the pointer is stolen, so xdr_free
is not called. In other cases no allocated memory is
present, so xdr_free.
This is hard to reason about, because the definition of
the struct is not visible in the client stubs.
Switch to use g_auto() for the 'ret' variable, which
means 'xdr_free' is always going to be called. Some
places now need to use g_steal_pointer as a result.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This replaces use of 'rpcgen' with our new python impl of
the RPC code generator. Since the new impl generates code
that matches our style/coding rules, and does not contain
long standing bugs, we no longer need to post-process the
output.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
It's somewhat confusing that some of the services have a
corresponding foo.service.extra.in and foo.socket.extra.in, some
have just one of the two, and some have neither.
In order to make things more approachable, make sure that both
files exists for each service.
In most cases the extra units are currently unused, so they will
just contain a comment briefly explaining their purpose and
pointing users to meson.build, where they can find more
information. The same comment is also added to the top of
extra units that already have some contents in them for
consistency.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
It uses custom templates which already hardcode the correct
value.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Like the Description, these are intended to be displayed to the
user, so it makes sense to have them towards the top of the file
before all the information that systemd will parse to calculate
dependencies.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Hypervisors are referred to by their user-facing name rather
than the name of their libvirt driver, the monolithic daemon is
explicitly referred to as legacy, and a consistent format is
used throughout.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Currently we only set this for the main sockets, which means
that
$ systemctl stop virtqemud.socket
will make the socket disappear from the filesystem while
$ systemctl stop virtqemud-ro.socket
won't. Get rid of this inconsistency.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
This results in all sockets for a service being enabled when a
single one of them is.
The -tcp and -tls sockets are intentionally excluded, because
enabling them should require explicit action on the
administrator's part; moreover, disabling them should not result
in the local sockets being disabled too.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
systemd will automatically infer this dependency based on the
socket's Service=foo.service setting.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Requires/Wants only tells systemd that the corresponding unit
should be started when the current one is, but that could very
well happen in parallel. For virtlogd/virtlockd, we want the
socket to be already active when the hypervisor driver is
started.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Up until now the files have been used as template for most
services, but now that those have been converted to common
templates we can drop parametrization and make it clear that
these files are for libvirtd only.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
We're about to change the defaults and start migrating to common
templates: in order to be able to switch units over one at a
time, make the input files that are currently used explicit
rather than implicit.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
The idea behind these is to prevent running both modular daemons
and monolithic daemon at the same time. We will implement a more
effective solution for that shortly.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
When libvirtd, virtlog and virtlockd are enabled, we want their
admin sockets to be enabled for socket activation as well.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
When changing the metadata via virNetworkSetMetadata(), we can
now emit an event to notify the app of changes. This is useful
when co-ordinating different applications read/write of custom
metadata.
Signed-off-by: K Shiva Kiran <shiva_kr@riseup.net>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Error messages are exempt from the 80 columns rule. Move them
onto one line.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
This fixes
commit 38abf9c34d
Author: Daniel P. Berrangé <berrange@redhat.com>
Date: Wed Jun 21 13:22:40 2023 +0100
src: set max open file limit to match systemd >= 240 defaults
The bug referenced in that commit had suggested to set
LimitNOFile=512000:1024
on the basis that matches current systemd default behaviour and is
compatible with old systemd. That was good except
* The setting is LimitNOFILE and these are case sensitive
* The hard and soft limits were inverted - soft must come
first and so it would have been ignored even if the
setting name was correct.
* The default hard limit is 524288 not 512000
Reported-by: Olaf Hering <olaf@aepfle.de>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
When a query for an interface via virInterfaceLookupByMACString finds
multiple interfaces an error is returned. Treat such error with the same
'debug' priority as we treat when the interface was not found to avoid
spamming logs with such configurations.
Closes: https://gitlab.com/libvirt/libvirt/-/issues/514
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
If one of previous commits taught us something, it's that:
sizeof(variable) and sizeof(type) are not the same. Especially
because for live enough code the type might change (e.g. as we
use autoptr more). And since we don't get any warnings when an
incorrect length is passed to memset() it is easy to mess up. But
with sizeof(variable) instead, it's not as easy. Therefore,
switch to using memset(variable, 0, sizeof(*variable)), or its
alternatives, depending on level of pointers.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Claudio Fontana <cfontana@suse.de>
This is a more concise approach and guarantees there is
no time window where the struct is uninitialized.
Generated using the following semantic patch:
@@
type T;
identifier X;
@@
- T X;
+ T X = { 0 };
... when exists
(
- memset(&X, 0, sizeof(X));
|
- memset(&X, 0, sizeof(T));
)
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Claudio Fontana <cfontana@suse.de>
Inside of remoteAuthSASL() the sargs variable is already
initialized to zero during declaration. There's no need to
memset() it again as it's unused in between it's declaration and
said memset().
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Claudio Fontana <cfontana@suse.de>
There are couple of variables that are declared at function
beginning but then used solely within a block (either for() loop
or if() statement). And just before their use they are zeroed
explicitly using memset(). Decrease their scope, use struct zero
initializer and drop explicit memset().
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Claudio Fontana <cfontana@suse.de>
A new bug was introduced as a part of use-after-free fix below:
commit 411cbe7199
Author: Oleg Vasilev <oleg.vasilev@virtuozzo.com>
Date: Tue Jul 4 13:10:22 2023 +0600
remote: fix stream use-after-free
When the message was processed partially, it is actually supposed to
stay in the queue to be processed again. In such case, reinsert it back.
Signed-off-by: Oleg Vasilev <oleg.vasilev@virtuozzo.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Inside daemonStreamHandleWrite on stream completion (status=OK) we
reuse msg object to send confirmation.
Only after that, msg is poped from the queue and checked for continue.
By that time, msg might've already been processed for the confirmation
and freed.
Signed-off-by: Oleg Vasilev <oleg.vasilev@virtuozzo.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Helped to debug next patch use-after-free.
Signed-off-by: Oleg Vasilev <oleg.vasilev@virtuozzo.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
After the previous commit we no longer require that logind is actually
running, it merely has to be activatable.
https://gitlab.com/libvirt/libvirt/-/issues/489
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Since systemd 240, all services get an open file hard limit of
500k, and a soft limit of 1024. This limit means apps are safe
to use select() by default which is limited to 1024 FDs. Apps
which don't use select() are expected to simply set their soft
limit to match the hard limit during startup.
With our current unit file settings we've been effectively
reducing the max open files we have on most modern systems.
https://gitlab.com/libvirt/libvirt/-/issues/489
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The unit files both have After=network.target, and this in turn implies
After=network-pre.target. Both iptables.service & ip6tables.service have
Before=network-pre.target since Fedora >= 35 and RHEL >= 8.4.
When we first added the deps on ip[6]tables.service in
commit 0756415f14
Author: Laine Stump <laine@redhat.com>
Date: Fri May 1 00:05:50 2020 -0400
systemd: start libvirtd after firewalld/iptables services
the Before=network-pre.target didn't exist, but we can rely on it now
given our supported platforms matrix.
The firewalld.service has similarly has a Before=network-pre.target,
even when we took that commit above, so this dep was in face never
actually needed. This answers the question posed in that above commit
message about firewalld ordering.
https://gitlab.com/libvirt/libvirt/-/issues/489
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
All services are ordered after local-fs.target unless they have set
DefaultDependencies=no, which we do not do.
https://gitlab.com/libvirt/libvirt/-/issues/489
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The warning about max_client_requests is hit inside virtlogd every time
a VM starts which spams the logs.
Emit the warning only when the client request limit is not 1 and add a
warning into the daemon config to not configure it too low instead.
Fixes: 031878c236
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2145188
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
In recent commit of v9.0.0-191-gc71c159248 I've introduced
remoteConnectFormatURI() function and in the function @query
variable. Even though, the variable is used, clang-13 fails to
see it. Surprisingly, newer clang is not affected. Fortunately,
swapping the order in which variables are set makes clang happy
again.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
When handling virConnectOpen(), we parse given URI, specifically
all those parameters we know, like ?mode, ?socket, ?name, etc.
ignoring those we don't recognize yet. Then, we reconstruct the
URI back, but ignoring all parameters we've parsed. In other
words:
qemu:///system?mode=legacy&foo=bar
becomes:
qemu:///system?foo=bar
The reconstructed URI is then passed to the corresponding driver
(QEMU in our example) with intent of it parsing parameters
further (or just ignoring them). But for some transport modes,
where virt-ssh-helper is ran on the remote host (libssh, libssh2,
ssh) we need to pass ?mode and ?socket parameters, so that it can
do the right thing, e.g. for 'mode=legacy' start the monolithic
daemon, or for 'socket=' connect to the given socket.
Resolves: https://gitlab.com/libvirt/libvirt/-/issues/433
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
There's a piece of code in doRemoteOpen() that is going to be
called twice. Instead of duplicating the code, move it into a
function that will be called twice, later on.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
