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[libvirt PATCH] qemu_hotplug: Set correct iommufdState on error path
by Pavel Hrdina 31 Mar '26

31 Mar '26

If hotplugging host device that needs to add iommufd object fails we need to remove the iommufd object as well. We also need to update the iommufdState otherwise hotplugging any host device with iommufd will fail for the same VM. Fixes: 5d16bef1a69500791be454239e3b9ac68ec53ace Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com> --- src/qemu/qemu_hotplug.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c index c86ebc59d0..9439948089 100644 --- a/src/qemu/qemu_hotplug.c +++ b/src/qemu/qemu_hotplug.c @@ -1679,8 +1679,10 @@ qemuDomainAttachHostPCIDevice(virQEMUDriver *driver, if (virHostdevIsPCIDeviceWithIOMMUFD(hostdev)) { qemuDomainObjEnterMonitor(vm); - if (removeiommufd) + if (removeiommufd) { + priv->iommufdState = false; ignore_value(qemuMonitorDelObject(priv->mon, "iommufd0", false)); + } qemuFDPassDirectTransferMonitorRollback(hostdevPriv->vfioDeviceFd, priv->mon); qemuFDPassDirectTransferMonitorRollback(priv->iommufd, priv->mon); -- 2.53.0

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[PATCH] NEWS: Document features/improvements/bug fixes I've participated in
by Michal Privoznik 31 Mar '26

31 Mar '26

From: Michal Privoznik <mprivozn(a)redhat.com> There are some features/improvements/bug fixes I've either contributed or reviewed/merged. Document them for upcoming release. Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com> --- NEWS.rst | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/NEWS.rst b/NEWS.rst index 59e209ec73..9d490ebbca 100644 --- a/NEWS.rst +++ b/NEWS.rst @@ -19,6 +19,13 @@ v12.2.0 (unreleased) * **Improvements** + * conf: support more than 255 vCPUs with amd-iommu + + With 256 or more vCPUs libvirt previously required EIM enabled for all + models of IOMMU. This is not valid for AMD model and validation was changed + so that XTSup is required there. Additionally, it is automatically enabled + if needed. + * **Bug fixes** -- 2.52.0

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[PATCH v5 0/3] nwfilter: add nwfilter nftables driver
by Dion Bosschieter 30 Mar '26

30 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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[PATCH v6 0/6] cover: RFE libvirt secret encryption on disk
by Arun Menon 30 Mar '26

30 Mar '26

Libvirt secrets are stored unencrypted on the disk. With this series we want to start encrypting the secrets. 1. Introduce the GnuTLS decryption wrapper functions that work exact opposite to the encryption wrappers. 2. Add a new service called virt-secrets-init-encryption, that is linked to the virtsecretd service. virtsecretd service only starts after the new service generates a random encryption key. 3. Add a new secrets.conf configuration file that helps user to set a. secrets_encryption_key - allows the user to specify the encryption key file path, in case the default key is not to be used. b. encrypt_data - set to 0 or 1. If set to 1, then the newly added secrets will be encrypted. 4. Add encryption scheme or cipher attribute that will allow us to choose the last used cipher. 5. Once we have the encryption key, and a reliable way to tell the daemon what encryption scheme the secret object is using, we can encrypt the secrets on disk and store them in <uuid>.<encryption_scheme> format. It is important to note that if the encryption key is changed between restarts, then the respective secret will not be loaded by the driver. 6. Add documentation. This is a sincere attempt to improve upon the already submitted patch https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/thread/KE6G… Resolves: https://issues.redhat.com/browse/RHEL-7125 --- Changes in v6: - changes to use obj->secretValueFile as base - does local suffix lookups - refactors code so that the base64 encoding is in common code paths - moves local variable declaration inside blocks using them - refactors loader to use virFileReadAll instead of open-coding - fixes virSecretObjDeleteData to not rely on the actual filename Changes in v5: - Fix the bug of updating old secrets, prior to 12.1.0. Old secrets, when updated, now are stored with the latest encryption scheme if encryption is on. - Remove any logic in setting the secretValueFile in virSecretObjListAdd. Move it to virSecretLoadValue and virSecretObjSetValue. - Change urandom to random. Change default permission bits to 0077. - Update the documentation. Changes in v4: - Fix the regression of loading unencrypted secrets after an upgrade. Previously the .base64 unencrypted secrets were not being loaded. - Add documentation on encrypted secrets. Changes in v3: - Secrets xml configuration no longer stores the encryption scheme, therefore not allowing the user to toggle between ciphers. - Removed unnecessary socket files of the new service. It now has a general configuration with which it starts. - Addressed review comments from Peter on coding style and design. - Loading of secrets is dependent on the file extension. Most recent cipher is used while saving the secrets. Changes in v2: - Corrected the encryption key length check. It should be 32. - Added a new patch that introduces the encryption scheme attribute. This will help us identify which secrets are encrypted. - A new systemd unit service file added that starts before virtsecretd, helping us to construct a random encryption key and pass it to the virtsecretd service. - Parsing logic of secrets.conf moved to a separate file. - Spec file changes, augeas. Arun Menon (6): util: Add support for GnuTLS decryption secret: Set up default encryption secret key for the virtsecretd service secret: Add secret.conf configuration file and parse it secret: Rename virSecretObj structure attribute from base64File to secretValueFile secret: Add functionality to load and save secrets in encrypted format docs: secret: Add documentation of secret encryption feature docs/drvsecret.rst | 4 + docs/meson.build | 1 + docs/secretencryption.rst | 105 +++++++++ include/libvirt/virterror.h | 1 + libvirt.spec.in | 8 + po/POTFILES | 1 + src/conf/virsecretobj.c | 210 +++++++++++++----- src/conf/virsecretobj.h | 14 +- src/libvirt_private.syms | 1 + src/meson.build | 1 + src/remote/libvirtd.service.in | 4 + src/secret/libvirt_secrets.aug | 40 ++++ src/secret/meson.build | 32 +++ src/secret/secret.conf.in | 14 ++ src/secret/secret_config.c | 179 +++++++++++++++ src/secret/secret_config.h | 40 ++++ src/secret/secret_driver.c | 29 ++- src/secret/test_libvirt_secrets.aug.in | 6 + .../virt-secret-init-encryption.service.in | 8 + src/secret/virtsecretd.service.extra.in | 8 + src/util/vircrypto.c | 126 ++++++++++- src/util/vircrypto.h | 8 + src/util/virerror.c | 3 + tests/vircryptotest.c | 65 ++++++ 24 files changed, 840 insertions(+), 68 deletions(-) create mode 100644 docs/secretencryption.rst create mode 100644 src/secret/libvirt_secrets.aug create mode 100644 src/secret/secret.conf.in create mode 100644 src/secret/secret_config.c create mode 100644 src/secret/secret_config.h create mode 100644 src/secret/test_libvirt_secrets.aug.in create mode 100644 src/secret/virt-secret-init-encryption.service.in -- 2.51.1

4 15

[PATCH] remote: Move secrets encryption dependency to a systemd drop-in
by Arun Menon 30 Mar '26

30 Mar '26

From: Arun Menon <armenon(a)redhat.com> The monolithic libvirtd.service currently has a dependency on virt-secret-init-encryption.service. This causes libvirtd to fail to start on systems where the secret driver is not installed or enabled, as systemd cannot satisfy the Requires= / After= units or the LoadCredentialEncrypted= path. See below, Requires=virt-secret-init-encryption.service After=virt-secret-init-encryption.service LoadCredentialEncrypted=secrets-encryption-key:@localstatedir@/lib/libvirt/secrets/secrets-encryption-key This patch decouples the secrets encryption logic from the main libvirtd service file. It is moved into a new systemd drop-in (50-libvirtd-secret.conf) which is only installed when libvirt is built with secret driver support. The override snippet is added to the daemon-driver-secret package. Fixes: 97758bc9a0b1fccf8c0009308658f1204b113b89 Signed-off-by: Arun Menon <armenon(a)redhat.com> Fix-Suggested-by: Andrea Bolognani <abologna(a)redhat.com> --- libvirt.spec.in | 2 ++ src/remote/libvirtd-secret.conf.in | 7 +++++++ src/remote/libvirtd.service.in | 4 ---- src/remote/meson.build | 15 +++++++++++++++ 4 files changed, 24 insertions(+), 4 deletions(-) create mode 100644 src/remote/libvirtd-secret.conf.in diff --git a/libvirt.spec.in b/libvirt.spec.in index 00316a03f2..d840c829d1 100644 --- a/libvirt.spec.in +++ b/libvirt.spec.in @@ -2259,6 +2259,8 @@ exit 0 %{_unitdir}/virtsecretd.socket %{_unitdir}/virtsecretd-ro.socket %{_unitdir}/virtsecretd-admin.socket +%dir %attr(0700, root, root) %{_unitdir}/libvirtd.service.d/ +%{_unitdir}/libvirtd.service.d/50-libvirtd-secret.conf %attr(0755, root, root) %{_sbindir}/virtsecretd %dir %attr(0700, root, root) %{_sysconfdir}/libvirt/secrets/ %dir %attr(0700, root, root) %{_localstatedir}/lib/libvirt/secrets/ diff --git a/src/remote/libvirtd-secret.conf.in b/src/remote/libvirtd-secret.conf.in new file mode 100644 index 0000000000..d64a6cf63e --- /dev/null +++ b/src/remote/libvirtd-secret.conf.in @@ -0,0 +1,7 @@ +[Unit] +Requires=@service@ +After=@service@ + +[Service] +Environment=SECRETS_ENCRYPTION_KEY=%d/secrets-encryption-key +LoadCredentialEncrypted=secrets-encryption-key:@localstatedir@/lib/libvirt/secrets/secrets-encryption-key diff --git a/src/remote/libvirtd.service.in b/src/remote/libvirtd.service.in index 7965010a0a..b0a062e885 100644 --- a/src/remote/libvirtd.service.in +++ b/src/remote/libvirtd.service.in @@ -12,8 +12,6 @@ After=libvirtd.socket After=libvirtd-ro.socket After=libvirtd-admin.socket Requires=virtlogd.socket -Requires=virt-secret-init-encryption.service -After=virt-secret-init-encryption.service Wants=virtlockd.socket After=virtlogd.socket After=virtlockd.socket @@ -31,8 +29,6 @@ Conflicts=xendomains.service Type=notify-reload Environment=LIBVIRTD_ARGS="--timeout 120" EnvironmentFile=-@initconfdir@/libvirtd -Environment=SECRETS_ENCRYPTION_KEY=%d/secrets-encryption-key -LoadCredentialEncrypted=secrets-encryption-key:@localstatedir@/lib/libvirt/secrets/secrets-encryption-key ExecStart=@sbindir@/libvirtd $LIBVIRTD_ARGS ExecReload=/bin/kill -HUP $MAINPID KillMode=process diff --git a/src/remote/meson.build b/src/remote/meson.build index e503263266..f1c521444f 100644 --- a/src/remote/meson.build +++ b/src/remote/meson.build @@ -343,4 +343,19 @@ if conf.has('WITH_SASL') ) endif +# The monolithic libvirt daemon only attempts to load the +# secrets encryption credentials if the secret driver is enabled +if conf.has('WITH_SECRETS') + secret_dropin_conf = configuration_data() + secret_dropin_conf.set('service', 'virt-secret-init-encryption.service') + secret_dropin_conf.set('localstatedir', localstatedir) + + configure_file( + input: 'libvirtd-secret.conf.in', + output: '50-libvirtd-secret.conf', + configuration: secret_dropin_conf, + install_dir: unitdir / 'libvirtd.service.d' + ) +endif + remote_inc_dir = include_directories('.') -- 2.53.0

1 0

Entering freeze for libvirt-12.2.0
by Jiri Denemark 30 Mar '26

30 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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[RFC] Reintroducing customisable hotplug timeouts
by Akash Kulhalli 30 Mar '26

30 Mar '26

I'd like to resurface an earlier proposal [1] to make the unplug timeout user-configurable. With production guests running sustained, non-trivial workloads, we find that hot(un)plug operations regularly takes longer than the current default of 5s. However, the inability to easily configure this timeout means that in the worst case a recompilation with appropriate values set is required for each deployment, which is cumbersome to maintain and patch. The previous proposal [1] also initially made the timeout configurable, however that was specifically for the ppc64 architecture. Therefore, imposing this change for an entire architecture made sense, since it was a universal requirement for that platform. With deployment environments as diverse and varied as x86, having a single, inconfigurable value does not make as much sense now. For x86, such a change is not ideal since the desired timeout value depends very heavily on the deployment environment in use - if it is being performed by a human anything more than 10s is an undesirable user experience [2], as pointed out in the original discussion. However, more relaxed timeout values (e.g. 15-20s) can be more acceptable if the operations are background/ not directly user-facing. It is in these cases where the ability to change the timeout more easily becomes more desirable. To prevent misconfiguration, while maintaining the same out-of-box experience for existing users, I'd also like to propose the following- 1. As mentioned in the original proposal [1], the timeout cannot be set to a value lower than the default timeout of 5s; in these cases a warning will be emitted and the timeout will be reset to the default value. 2. Including an upper cap would also be desirable, in my opinion - any API consumer should not wait endlessly for an async operation to finish. 3. This configuration option will only be described in qemu.conf, not imposed - the out-of-box experience will remain unchanged at the current default (5s) for everyone who does not wish to tweak/is unaware of this value. An administrator who knowingly changes these values is therefore not blindsided by any perceived "hangs" resulting from the use of an increased timeout window. Since this would be a clearly documented and explicitly opt-in behaviour, the benefits in the form of easy modification based on evolving operational needs would be quite significant. Given the varying nature of production environments and specific operational needs at scale, it would therefore be beneficial to reconsider the merits of the original proposal. [1] https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/thread/TXYV… [2] https://www.nngroup.com/articles/response-times-3-important-limits/

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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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