March 2026 - Devel - libvirt List Archives

[PATCH v5 0/3] nwfilter: add nwfilter nftables driver
by Dion Bosschieter 27 Mar '26

27 Mar '26

This series aims to implement nftables as a backend driver for the nwfilter feature. The idea is that it will replace the ebiptables driver and provide an easy way for users to switch from one driver to another. The 1st patch introduces the new nwfilter driver. After which nwfilter allows users to choose it in the 2nd patch. The last patch introduces unit testing of the new nftables driver. - Implemented very basic nwfilter.conf reading and choosing a nwfilter driver based on the name of the drivers (nftables/ebiptables). Defaults to the nftables driver, based on the firewall_backend_priority meson option, following the bridge driver logic. - Resolves issue https://gitlab.com/libvirt/libvirt/-/issues/603 benchmarks showed that the amount of iifname jumps for each interface with is the cause for this. Switched the nftables driver towards a vmap (verdict map) so we can have 1 rule that jumps to the correct root input/output chain per interface. Which improves throughput as when the number of interface check and jump rules increases the throughput decreases. The issue describes the interface matching works using the interface name and the majority of the effort is the strncpy, this commit also switches nftables to an interface_index compare instead. However, just using the interface_index is not enough, the amount of oif and iif jump rules causes quite a performance issue, the vmap instead solves this. - Split rules into separate tables: "libvirt-nwfilter-ethernet" and "libvirt-nwfilter-other" to preserve existing firewall behavior. - Reworked chain logic for clarity with root -input/-output chains per interface. input in the VM interface is filtered in the -input chain(s), output out of the VM inteface is filtered in the -output chain(s). - Stuck with prerouting and postrouting as hooks for input / output on the -ethernet and -other table. This makes it easier to merge the tables in the future. Saving management of two tables and decreasing the amount of tables a packet sees. Currently ebtables filtering happens via PREROUTING and POSTROUTING hooks, while ip/ip6tables filtering happens in the output/forward hooks. - Stuck with 2 tables for compatibility reasons with eb iptables, unifying into 1 table will break users firewall definitions, which depend on being able to do accepts on ethernet rules (which currently get defined via ebtables) and additional filtering via the ip rules (which currently get defined via ip(6)tables). The nwfilter_nftables_driver keeps splitting the ethernet and non ethernet (other) rules in seperate tables "libvirt-nwfilter-ethernet" and "libvirt-nwfilter-other". - Rewrote chain logic, so it is easier to understand, input in the VM interface is filtered in the -input chain(s), output out of the VM inteface is filtered in the -output chain(s). -ethernet and -other table follow the same style and hook in the same way. - Simplified conntrack handling: rules with accept+conntrack are duplicated to the opposite chain for symmetric behavior, to support the existing ebiptables logic. - Firewall updates continue use tmp names for atomic replacement. Unsupported nwfilter features (for now): - STP filtering - Gratuitous ARP filtering - IPSets (potential future support via nft sets) - Reject due to filtering in pre/postrouting, using drop instead of reject, copying logic from existing ebiptables ebtables actions Future improvements: - Use `nft -f` for atomic rule application. - Optional single-table mode via nwfilter.conf. - Optimize boot phase with chain hash comparison. --- Changes in v5: - Fix rarp support via nft raw payload expression Changes in v4: - Fix rarp nft commands "arp saddr ether" "arp daddr ether" - Filter chain creation, don't create unnecessary chains - Apply danpb seperate argument suggestion - Fix table not existing errors in drop all rules - Fix table not existing errors in apply basic rules Changes in v3: - Renamed -other to -inet - Renamed - to _ in table names - Updated rule / chain sorting on ethernet table to to copy ebtables logic - Fix possible broken revert path - Fix remove rules not working in some cases, EBUSY - Shared functions camel case commit - Rename config option - Add extra config params, enable_trace, enable_counters This required passing the config struct to the ebip/nft nwfilter drivers - Add extra augeaus files Changes in v2: - Rename {ebip,nf}tables specific test files in 1 directory instead of seperating them in different directories. - Added default nwfilter.conf file in git, documented including augeas files - Replaced hardcoding of default driver based on existing firewall_backend_priority meson option. - Added nwfilter_driver_conf.{h,c} for configuration handling, to match the common pattern used in other drivers. Dion Bosschieter (3): nwfilter: add nwfilter nftables driver nwfilter: allow use of nftables nwfilter driver via nwfilter.conf nwfilter: add unit tests and test data for nwfilter nftables driver libvirt.spec.in | 7 + po/POTFILES | 2 + src/conf/virnwfilterobj.h | 20 - src/nwfilter/libvirtd_nwfilter.aug | 45 + src/nwfilter/meson.build | 38 + src/nwfilter/nwfilter.conf.in | 50 + src/nwfilter/nwfilter_driver.c | 66 +- src/nwfilter/nwfilter_driver_conf.c | 214 + src/nwfilter/nwfilter_driver_conf.h | 69 + src/nwfilter/nwfilter_ebiptables_driver.c | 4 +- src/nwfilter/nwfilter_ebiptables_driver.h | 2 +- src/nwfilter/nwfilter_gentech_driver.c | 65 +- src/nwfilter/nwfilter_gentech_driver.h | 5 +- src/nwfilter/nwfilter_nftables_driver.c | 2668 ++++++++++++ src/nwfilter/nwfilter_nftables_driver.h | 28 + src/nwfilter/nwfilter_tech_driver.h | 3 +- src/nwfilter/test_libvirtd_nwfilter.aug.in | 7 + tests/meson.build | 2 + tests/nwfilternftablestest.c | 426 ++ .../ah-ipv6-linux.nftables.args | 310 ++ .../ah-linux.nftables.args | 304 ++ .../all-ipv6-linux.nftables.args | 292 ++ .../all-linux.nftables.args | 286 ++ .../arp-linux.nftables.args | 231 + .../nwfilterxml2firewalldata/arp.nftables.xml | 27 + .../comment-linux.nftables.args | 510 +++ .../conntrack-linux.nftables.args | 198 + .../esp-ipv6-linux.nftables.args | 310 ++ .../esp-linux.nftables.args | 304 ++ .../example-1-linux.nftables.args | 268 ++ .../example-2-linux.nftables.args | 352 ++ .../hex-data-linux.nftables.args | 384 ++ .../icmp-direction-linux.nftables.args | 238 ++ .../icmp-direction2-linux.nftables.args | 238 ++ .../icmp-direction3-linux.nftables.args | 184 + .../icmp-linux.nftables.args | 256 ++ .../icmpv6-linux.nftables.args | 328 ++ .../igmp-linux.nftables.args | 304 ++ .../ip-linux.nftables.args | 205 + .../ipt-no-macspoof-linux.nftables.args | 172 + .../ipv6-linux.nftables.args | 511 +++ .../iter1-linux.nftables.args | 304 ++ .../iter2-linux.nftables.args | 3760 +++++++++++++++++ .../iter3-linux.nftables.args | 430 ++ .../mac-linux.nftables.args | 184 + .../rarp-linux.nftables.args | 215 + .../sctp-ipv6-linux.nftables.args | 328 ++ .../sctp-linux.nftables.args | 328 ++ .../target-linux.nftables.args | 466 ++ .../target2-linux.nftables.args | 322 ++ .../tcp-ipv6-linux.nftables.args | 328 ++ .../tcp-linux.nftables.args | 476 +++ .../udp-ipv6-linux.nftables.args | 328 ++ .../udp-linux.nftables.args | 328 ++ .../udplite-ipv6-linux.nftables.args | 310 ++ .../udplite-linux.nftables.args | 304 ++ .../vlan-linux.nftables.args | 271 ++ .../ah-ipv6-linux.args | 304 ++ .../nwfilterxml2nftfirewalldata/ah-linux.args | 298 ++ .../all-ipv6-linux.args | 286 ++ .../all-linux.args | 280 ++ .../arp-linux.args | 215 + tests/nwfilterxml2nftfirewalldata/arp.xml | 27 + .../comment-linux.args | 483 +++ .../conntrack-linux.args | 198 + .../esp-ipv6-linux.args | 304 ++ .../esp-linux.args | 298 ++ .../example-1-linux.args | 266 ++ .../example-2-linux.args | 348 ++ .../hex-data-linux.args | 357 ++ .../icmp-direction-linux.args | 238 ++ .../icmp-direction2-linux.args | 238 ++ .../icmp-direction3-linux.args | 184 + .../icmp-linux.args | 252 ++ .../icmpv6-linux.args | 322 ++ .../igmp-linux.args | 298 ++ .../nwfilterxml2nftfirewalldata/ip-linux.args | 198 + .../ipt-no-macspoof-linux.args | 169 + .../ipv6-linux.args | 474 +++ .../iter1-linux.args | 298 ++ .../iter2-linux.args | 3598 ++++++++++++++++ .../iter3-linux.args | 418 ++ .../mac-linux.args | 180 + .../rarp-linux.args | 215 + .../sctp-ipv6-linux.args | 314 ++ .../sctp-linux.args | 314 ++ .../target-linux.args | 452 ++ .../target2-linux.args | 316 ++ .../tcp-ipv6-linux.args | 314 ++ .../tcp-linux.args | 468 ++ .../udp-ipv6-linux.args | 314 ++ .../udp-linux.args | 314 ++ .../udplite-ipv6-linux.args | 304 ++ .../udplite-linux.args | 298 ++ .../vlan-linux.args | 264 ++ tests/nwfilterxml2nftfirewalltest.c | 438 ++ 96 files changed, 33369 insertions(+), 102 deletions(-) create mode 100644 src/nwfilter/libvirtd_nwfilter.aug create mode 100644 src/nwfilter/nwfilter.conf.in create mode 100644 src/nwfilter/nwfilter_driver_conf.c create mode 100644 src/nwfilter/nwfilter_driver_conf.h create mode 100644 src/nwfilter/nwfilter_nftables_driver.c create mode 100644 src/nwfilter/nwfilter_nftables_driver.h create mode 100644 src/nwfilter/test_libvirtd_nwfilter.aug.in create mode 100644 tests/nwfilternftablestest.c create mode 100755 tests/nwfilterxml2firewalldata/ah-ipv6-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/ah-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/all-ipv6-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/all-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/arp-linux.nftables.args create mode 100644 tests/nwfilterxml2firewalldata/arp.nftables.xml create mode 100755 tests/nwfilterxml2firewalldata/comment-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/conntrack-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/esp-ipv6-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/esp-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/example-1-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/example-2-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/hex-data-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/icmp-direction-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/icmp-direction2-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/icmp-direction3-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/icmp-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/icmpv6-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/igmp-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/ip-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/ipt-no-macspoof-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/ipv6-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/iter1-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/iter2-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/iter3-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/mac-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/rarp-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/sctp-ipv6-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/sctp-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/target-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/target2-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/tcp-ipv6-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/tcp-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/udp-ipv6-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/udp-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/udplite-ipv6-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/udplite-linux.nftables.args create mode 100755 tests/nwfilterxml2firewalldata/vlan-linux.nftables.args create mode 100755 tests/nwfilterxml2nftfirewalldata/ah-ipv6-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/ah-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/all-ipv6-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/all-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/arp-linux.args create mode 100644 tests/nwfilterxml2nftfirewalldata/arp.xml create mode 100755 tests/nwfilterxml2nftfirewalldata/comment-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/conntrack-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/esp-ipv6-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/esp-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/example-1-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/example-2-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/hex-data-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/icmp-direction-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/icmp-direction2-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/icmp-direction3-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/icmp-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/icmpv6-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/igmp-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/ip-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/ipt-no-macspoof-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/ipv6-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/iter1-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/iter2-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/iter3-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/mac-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/rarp-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/sctp-ipv6-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/sctp-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/target-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/target2-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/tcp-ipv6-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/tcp-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/udp-ipv6-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/udp-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/udplite-ipv6-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/udplite-linux.args create mode 100755 tests/nwfilterxml2nftfirewalldata/vlan-linux.args create mode 100644 tests/nwfilterxml2nftfirewalltest.c -- 2.43.0

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[libvirt PATCH] hypervisor: Call virWaitForDevices() after detaching host devices
by Pavel Hrdina 27 Mar '26

27 Mar '26

From: Pavel Hrdina <phrdina(a)redhat.com> On systems with selinux enabled starting a VM with managed host device using IOMMUFD backend can run into race-condition where both libvirt and udev are setting selinux label on /dev/vfio/devices/vfioX device. If udev is the last one to set selinux label starting VM fails with: error: internal error: QEMU unexpectedly closed the monitor (vm='test'): 2026-03-26T15:47:36.620422Z qemu-kvm: -device {"driver":"vfio-pci","id":"hostdev0","iommufd":"iommufd0","fd":"20","bus":"pci.7","addr":"0x0"}: vfio hostdev0: Failed to add fd 20 to KVM VFIO device: Invalid argument We need to wait for udev to finish processing all events. Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com> --- src/hypervisor/virhostdev.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/src/hypervisor/virhostdev.c b/src/hypervisor/virhostdev.c index f4d2176204..b063a44f62 100644 --- a/src/hypervisor/virhostdev.c +++ b/src/hypervisor/virhostdev.c @@ -782,6 +782,9 @@ virHostdevPreparePCIDevicesImpl(virHostdevManager *mgr, } } + /* Step 2.5: Wait for udev to handle all events for devices. */ + virWaitForDevices(); + /* At this point, all devices are attached to the stub driver and have * been marked as inactive */ -- 2.53.0

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[PATCH] virpci: Stop writing out of bounds in virPCIDeviceReadClass()
by Michal Privoznik 27 Mar '26

27 Mar '26

From: Michal Privoznik <mprivozn(a)redhat.com> Inside of virPCIDeviceReadClass() there's a call to virFileReadAll(). This reads contents of given file into a buffer (id_str). To make sure the buffer is NUL terminated string there's then write of NUL byte at 9th position of the buffer. Well, this is redundant as virFileReadAll() made sure the buffer is properly terminated on success (transitively¸ via saferead_lim()). But it is also wrong, because there's no guarantee the file is more than 8 bytes long. Just remove the NUL termination and rely on virFileReadAll() to properly terminate the buffer. Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com> --- src/util/virpci.c | 1 - 1 file changed, 1 deletion(-) diff --git a/src/util/virpci.c b/src/util/virpci.c index ca6f2e8210..2e32ed17ff 100644 --- a/src/util/virpci.c +++ b/src/util/virpci.c @@ -487,7 +487,6 @@ virPCIDeviceReadClass(virPCIDevice *dev, uint16_t *device_class) if (virFileReadAll(path, 9, &id_str) < 0) return -1; - id_str[8] = '\0'; if (virStrToLong_ui(id_str, NULL, 16, &value) < 0) { virReportError(VIR_ERR_INTERNAL_ERROR, _("Unusual value in %1$s/devices/%2$s/class: %3$s"), -- 2.52.0

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[PATCH 0/6] Fix current CI failures and document behaviour
by Peter Krempa 27 Mar '26

27 Mar '26

Fix the CI failure I've caused, one more instance of the same problem that didn't yet cause write beyound buffer, document all the functions to prevent users from guessing and remove redundant code. The last function also optimizes further to prevent over-allocating the buffers to read the files. Peter Krempa (6): virPCIDeviceReadClass: Don't write beyond end of buffer from virFileReadAll virSecretLoadValue: Don't re-termiante the buffer virNetDevIPCheckIPv6Forwarding: Don't NUL terminate buffer from virFileReadAll virPCIDeviceReadID: Fix use of 'virFileReadAll' util: virfile: Document the various functions for reading from file/fd util: virfile: Don't over-allocate buffers in saferead_lim src/conf/virsecretobj.c | 3 - src/util/virfile.c | 145 +++++++++++++++++++++++++++++++++++----- src/util/virnetdevip.c | 4 -- src/util/virpci.c | 10 +-- 4 files changed, 135 insertions(+), 27 deletions(-) -- 2.53.0

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[PATCH 0/3] leak fixes and buffer allocation optimization
by Peter Krempa 26 Mar '26

26 Mar '26

Peter Krempa (3): qemu: driver: Don't leak 'qemu_driver->backupPorts' secret: config: Don't leak 'cfg->secretsEncryptionKey' util: file: Shrink buffer returned from 'saferead_lim' to actual size src/qemu/qemu_driver.c | 1 + src/secret/secret_config.c | 1 + src/util/virfile.c | 1 + 3 files changed, 3 insertions(+) -- 2.53.0

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[PATCH 0/3] Add test for virHostCPUGetMap and fix it
by Martin Kletzander 26 Mar '26

26 Mar '26

I found an old patch that fell between the cracks and to show that it can manifest itself I also added a test in PATCH 3/3 which fails without PATCH 2/3, but it shows the explained case from the 2nd patch's commit message. Can be squashed to any of the other two, this is just easier to see I feel like. Felix Huettner (1): virhostcpu: Fix potential use of unallocated memory Martin Kletzander (2): tests: Extend virhostcputest to check virHostCPUGetMap tests/virhostcpudata: Add test case with many offline CPUs src/util/virhostcpu.c | 22 ++++--- .../linux-many-offline/cpu/online | 1 + .../linux-many-offline/cpu/present | 1 + tests/virhostcputest.c | 57 +++++++++++++++++++ 4 files changed, 69 insertions(+), 12 deletions(-) create mode 100644 tests/virhostcpudata/linux-many-offline/cpu/online create mode 100644 tests/virhostcpudata/linux-many-offline/cpu/present -- 2.53.0

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Entering freeze for libvirt-12.2.0
by Jiri Denemark 26 Mar '26

26 Mar '26

I have just tagged v12.2.0-rc1 in the repository and pushed signed tarballs to https://download.libvirt.org/ Please give the release candidate some testing and in case you find a serious issue which should have a fix in the upcoming release, feel free to reply to this thread to make sure the issue is more visible. If you have not done so yet, please update NEWS.rst to document any significant change you made since the last release. Jirka

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[PATCH 0/3] security: Don't error out on seclabels of type='none'
by Michal Privoznik 26 Mar '26

26 Mar '26

*** BLURB HERE *** Michal Prívozník (3): conf: Fix seclabel type parsing wrt default value security: Rewrite virSecurityManagerCheckModel() to use g_autofree security: Don't error out on seclabels of type='none' src/conf/domain_conf.c | 13 +++++------ src/security/security_manager.c | 41 ++++++++++++++++++++++++--------- 2 files changed, 36 insertions(+), 18 deletions(-) -- 2.52.0

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[PATCH v2] virhostcpu: Fix potential use of unallocated memory
by Felix Huettner 26 Mar '26

26 Mar '26

In case of a host that has a large number of cpus offline the count of host cpus and the last bit set in the virHostCPUGetOnlineBitmap might diverge significantly. This can e.g. be the case when disabling smt via /sys/devices/system/cpu/smt/control. On the host this looks like: ``` $ cat /sys/devices/system/cpu/present 0-255 $ cat /sys/devices/system/cpu/online 0-127 ``` However in this case virBitmapToData previously only allocated 16 bytes for the output bitmap. This is becase the last set bit is on the 15th byte. Users of virHostCPUGetMap however rely on the "cpumap" containing enough space for all existing cpus (so they would expect 32 bytes in this case). E.g. cmdNodeCpuMap relies on this for its output. It will then actually read 32 bytes from the start of the "cpumap" address where in this case the last 16 of these bytes are uninitialized. This manifests itself in flapping outputs of "virsh nodecpumap --pretty" like: ``` $ virsh nodecpumap --pretty CPUs present: 256 CPUs online: 128 CPU map: 0-127,192,194,202 $ virsh nodecpumap --pretty CPUs present: 256 CPUs online: 128 CPU map: 0-127,192,194,197 $ virsh nodecpumap --pretty CPUs present: 256 CPUs online: 128 CPU map: 0-127,192,194,196-197 ``` This in turn potentially causes users of this data to report wrong cpu counts. Note that this only seems to happen with at least 256 physical cpus where at least 128 are offline. We fix this by preallocating the expected bitmap size. Signed-off-by: Felix Huettner <felix.huettner(a)stackit.cloud> --- src/util/virhostcpu.c | 22 ++++++++++------------ 1 file changed, 10 insertions(+), 12 deletions(-) diff --git a/src/util/virhostcpu.c b/src/util/virhostcpu.c index 5dbcc8987c..4805484b1d 100644 --- a/src/util/virhostcpu.c +++ b/src/util/virhostcpu.c @@ -1090,28 +1090,26 @@ virHostCPUGetMap(unsigned char **cpumap, unsigned int flags) { g_autoptr(virBitmap) cpus = NULL; - int ret = -1; - int dummy; + int ncpus = virHostCPUGetCount(); virCheckFlags(0, -1); if (!cpumap && !online) - return virHostCPUGetCount(); + return ncpus; if (!(cpus = virHostCPUGetOnlineBitmap())) - goto cleanup; + return -1; + + if (cpumap) { + int len = (ncpus + CHAR_BIT) / CHAR_BIT; + *cpumap = g_new0(unsigned char, len); + virBitmapToDataBuf(cpus, *cpumap, len); + } - if (cpumap) - virBitmapToData(cpus, cpumap, &dummy); if (online) *online = virBitmapCountBits(cpus); - ret = virHostCPUGetCount(); - - cleanup: - if (ret < 0 && cpumap) - VIR_FREE(*cpumap); - return ret; + return ncpus; } base-commit: c5a73f75bc6cae4f466d0a6344d5b3277ac9c2f4 -- 2.43.0

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[PATCH] virxml: Fix virXMLPropTristateBoolAllowDefault() documentation
by Michal Privoznik 26 Mar '26

26 Mar '26

From: Michal Privoznik <mprivozn(a)redhat.com> The documentation to virXMLPropTristateBoolAllowDefault() refers to itself while it meant to refer to virXMLPropTristateBool(). Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com> --- src/util/virxml.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/src/util/virxml.c b/src/util/virxml.c index 274f072598..beb5301378 100644 --- a/src/util/virxml.c +++ b/src/util/virxml.c @@ -525,13 +525,13 @@ virXMLPropTristateBool(xmlNodePtr node, } -/* Same as virXMLPropTristateBoolAllowDefault, but will accept the - * value 'default' and convert it to VIR_TRISTATE_BOOL_ABSENT instead - * of rejecting it with an error. Should only be used for backwards - * compatibility reasons, and specifically to parse XML files where a - * property having value VIR_TRISTATE_BOOL_ABSENT has historically - * resulted in it being formatted with value 'default' instead of - * being omitted entirely */ +/* Same as virXMLPropTristateBool, but will accept the value 'default' + * and convert it to VIR_TRISTATE_BOOL_ABSENT instead of rejecting it + * with an error. Should only be used for backwards compatibility + * reasons, and specifically to parse XML files where a property + * having value VIR_TRISTATE_BOOL_ABSENT has historically resulted in + * it being formatted with value 'default' instead of being omitted + * entirely. */ int virXMLPropTristateBoolAllowDefault(xmlNodePtr node, const char *name, -- 2.52.0

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