On QEMU command line it's represented by the dirty-ring-size
attribute of KVM accelerator.
Signed-off-by: Hyman Huang(黄勇) <huangy81@chinatelecom.cn>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Dirty ring feature was introduced in qemu-6.1.0, this patch
add the corresponding feature named 'dirty-ring', which enable
dirty ring feature when starting VM.
To enable the feature, the following XML needs to be added to
the guest's domain description:
<features>
<kvm>
<dirty-ring state='on' size='xxx'>
</kvm>
</features>
If property "state=on", property "size" must be specified, which
should be power of 2 and range in [1024, 65526].
Signed-off-by: Hyman Huang(黄勇) <huangy81@chinatelecom.cn>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
In future commits we will need to store not just an array of
VIR_TRISTATE_SWITCH_* but also an additional integer. Follow the
example of TCG and introduce a structure where both the array an
integer can live.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
There is no longer anything to initialize at binary startup time.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Since the currentBackend (direct vs. firewalld) setting is no longer
used for anything, we don't need to set it (either explicitly from
tests, or implicitly during init), and can completely remove it.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
It's unclear exactly why this check exists; possibly a parallel to a
long-removed check for the firewall-cmd binary (added to viriptables.c
with the initial support for firewalld in commit bf156385a0 in 2012,
and long since removed), or possibly because virFirewallOnceInit() was
intended to be called at daemon startup, and it seemed like a good
idea to just log this error once when trying to determine whether to
use firewalld, or direct iptables commands, and then not waste time
building commands that could never be executed. The odd thing is that
it would sometimes result in logging an error when it couldn't find a
binary that wasn't needed anyway (e.g., if all the rules were iptables
rules, but ebtables and/or ip6tables weren't also installed).
If we just remove this check, then virCommandRun() will end up logging
an error and failing if the needed binary isn't found when we try to
execute it, which seems like it should just as good (or at least good
enough, especially since we eventually want to get rid of iptables
completely).
So let's remove it!
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This function doesn't have anything to do with manipulating
virFirewall objects, but rather should be called in response to dbus
events about the firewalld service. Move this function into
virfirewalld.c, and rename it to virFirewallDSynchronize().
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This function doesn't need to check for a backend - synchronization
with firewalld should always be done whenever firewalld is registered
and available, not just when the firewalld backend is selected.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Since commit b19863640 both useful cases of the switch statement in
this function have made the same call (and the other/default case is
just an error that can never happen). Eliminate the switch to help
eliminate use of currentBackend.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
It isn't intuitive (to me) that a test just converting xml text into
iptables commands should need to call dbus, so rather than forcing the
next person to look through the commit logs and/or run the test under
gdb to understand why this is needed, just add a short comment in the
source.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Several functions were simplified to remove the only cleanup code at
the cleanup label, making it unnecessary.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
When libvirt added support for firewalld, all iptables/ebtables rules
were added via the firewalld "passthrough" API when firewalld was
enabled (the "firewalld backend"), or run directly by libvirt when
firewalld was disabled (the so-called "direct
backend"). virfirewalltest.c dutifully ran each test twice, once with
the each backend enabled.
But commit b19863640d changed the code to *always* directly run
iptables/ebtables commands, and never use the firewalld passthrough
API, effectively making the direct and firewalld backends identical,
except that when libvirt receives notice that firewalld has restarted
or reloaded its rules, the firewalld backend sends an extra "iptables
-V" command via firewalld's passthrough API (and waits for a response)
prior to running all the rest of the iptables commands directly; this
assures that a newly-restarted firewalld has finished its work on the
filter tables before libvirt starts messing with it. (Because this
code is only executed in response to an event from dbus, it isn't
tested in the unit tests).
In spite of this, we still go through all the virfirewall tests twice
though - once for the direct backend, and once for the firewalld
backend, even though these take the same codepath.
In commit b19863640d I had left this double-testing in thinking that
someday we might go back to actually doing something useful with the
firewalld backend in the course of adding support for native nftables,
but I've now realized that for the case of nftables we will be *even
more* divorced from firewalld, so there is really no point in keeping
this code around any longer. (It's likely/probable that the tests will
be done twice again in the future, but it will be enough different
that it is better to remove this code and re-implement from scratch
when adding the nftables backend, rather than trying to directly
modify the existing code and end up with something even more
confusing).
This patch eliminates all the test duplication in virfirewalltest.c,
including mocking dbus, which is unnecessary since none of the tests
use dbus (for now we ensure that by explicitly setting the virfirewall
backend to DIRECT before any of the tests have run. Eventually the
concept of a "firewalld backend" will disappear completely, but that's
for another patch.)
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Rather than calling these "ADD" and "REMOVE", which could be confused
with some other random items with the same names, make them more
specific by prepending "VIR_NETFILTER_" (because they will also be
used by the nftables backend) and rename them to match the
iptables/nftables operators they signify, i.e. INSERT and DELETE, just
to eliminate confusion (in particular, in case someone ever decides
that we need to also use the nftables "add" operator, which appends a
rule to a chain rather than inserting it at the beginning of the
chain).
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This function formats an address + prefix as, e.g. 192.168.122.0/24,
which is useful in places other than iptables. Move it to
virsocketaddr.c and make it public so that others can use it. While
moving, the bit that masks off the host bits of the address is made
optional, so that the function is more generally useful.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
The network driver has put all its rules into private chains (created
by libvirt) since commit 7431b3eb9a, which was included in
libvirt-5.1.0. When the conversion was made, code was included that
would attempt to delete existing rules in the default chains, to make
it possible to upgrade libvirt without restarting the host OS.
Almost 3 years has passed, and it is doubtful that anyone will be
attempting to upgrade directly from a pre-5.1.0 libvirt to something
as new as 8.0.0 (possibly with the exception of upgrading the entire
OS to a new release, which would include also rebooting), so it is now
safe to remove this code.
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Use g_auto for virCommand and char * and drop the cleanup label.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Use automatic cleanup for virCommand, steal it on success
and remove the error label.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Use g_auto and remove the ret variable, as well as the cleanup label.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Use g_auto and remove the 'ret' variable, as well as the out label.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Use g_auto and remove the 'ret' variable, as well as the cleanup label.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Use g_auto and remove the 'ret' variable, as well as the cleanup label.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Generating command line is pretty easy - just put tb-size=XXX
onto -accel tcg part. Note, that QEMU expects the size in MiB.
Resolves: https://gitlab.com/libvirt/libvirt/-/issues/229
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Tested-by: Kashyap Chamarthy <kchamart@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
After previous commit it's possible for domains to fine tune TCG
features (well, just one - tb-cache). Check that domain has TCG
enabled, otherwise the feature makes no sense.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
It may come handy to be able to tweak TCG options, in this
specific case the size of translation block cache size (tb-size).
Since we can expect more knobs to tweak let's put them under
common element, like this:
<domain>
<features>
<tcg>
<tb-cache unit='MiB'>128</tb-cache>
</tcg>
</features>
</domain>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Tested-by: Kashyap Chamarthy <kchamart@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
When using the monolithic daemon the driver for virStream is
always virFDStreamDrv and thus calling virStreamInData() results
in calling virFDStreamInData().
But things are different with split daemon, especially when a
client connects to one of hypervisor daemons (e.g. virtqemud) and
then lets the daemon connect to the storage daemon for
vol-upload/vol-download. Here, the hypervisor daemon acts like
both client and server. This is reflected by stream->driver
pointing to remoteStreamDrv, which doesn't have streamInData
callback implemented and thus vol-upload/vol-download with sparse
flag fails.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2026537
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
The aim of this function is to look at a virNetClientStream and
tell whether the incoming packet (if there's one) contains data
(type VIR_NET_STREAM) or a hole (type VIR_NET_STREAM_HOLE) and
how big the section is. This function will be called from the
remote driver in one of future commits.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
So far, virStreamInData() is effectively a wrapper over
virFDStreamInData() which means it deals with files which can be
rewound (lseek()-ed) to whatever position we need. And in fact,
that's what virFDStreamInData() does - it makes sure that the FD
is left unchanged in terms of position in the file. Skipping the
hole happens soon after - in daemonStreamHandleRead() when
virStreamSendHole() is called.
But this is about to change. Soon we will have another implementation
where we won't be dealing with FDs but virNetMessage queue and it will
be handy to pop message at the beginning of the queue. Implement and
document this new behavior.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
In the QEMU driver, we allocate private source data unconditionally
for every chardev and the rest of the function just assumes it's there.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
After recent cleanups, there are some pointless cleanup sections.
Clean them up.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Return the desired values directly and clean up the redundant
else branches.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Convert all the functions that generate virCaps to use g_auto
and g_steal_pointer.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Convert all the users who unref their virCaps object unconditionally.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
When adding the ACL check and caps getter, we assumed that
the default return value is -1, not 0 as usual.
Fix the return value on error by assigning them explicitly.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
shared_module() is intended for shared objects that are
loaded at runtime using dlopen() whereas NSS plugins need to
be full-fledged shared libraries with, among other things, a
proper SONAME.
Meson seems to have become more strict about this recently,
because libnss_libvirt.so.2 gets a SONAME when I build it with
Meson 0.59.4 on Fedora 34 but doesn't when I use Meson 0.60.2
on Debian testing instead.
Either way, shared_library() was always the right function
to use for NSS plugins.
Fixes: 36780c9319
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
