[PATCH V2 0/2] qemu: Clarify purpose of image format settings
by Jim Fehlig
The current documentation of the various foo_image_format settings in
qemu.conf subtly implies they are only used for specifying compression.
Patch1 of this small series attempts to clarify and improve the description
of the settings. It defines image format as a way to specify the desired
layout of guest memory blocks on disk.
Patch2 changes the use of 'compressed' with 'format' throughout the
code, removing implication that format == compressed.
V2:
Replace more uses of 'compressed' with 'format' in patch2
Jim Fehlig (2):
qemu: conf: Improve the foo_image_format setting descriptions
qemu: Use consistent naming for save image format
src/qemu/qemu.conf.in | 40 +++++++++++++++++++++++----------------
src/qemu/qemu_driver.c | 30 ++++++++++++++---------------
src/qemu/qemu_saveimage.c | 32 +++++++++++++++----------------
src/qemu/qemu_saveimage.h | 4 ++--
src/qemu/qemu_snapshot.c | 6 +++---
5 files changed, 60 insertions(+), 52 deletions(-)
--
2.35.3
6 months
[PATCH v2 0/1] Add support for RAPL MSRs feature in QEMU
by Anthony Harivel
Hi,
First of all, kudos to Peter Krempa for his fast review!
In this v2, I've addressed the following points:
- The socket is *not* mandatory and my code totally confused Peter.
Sorry about that!
here a snippet of the QEMU code to understand:
/* Compute the socket path if necessary */
if (s->msr_energy.socket_path == NULL) {
s->msr_energy.socket_path = vmsr_compute_default_paths();
}
So I made all the modification to make it not necessary.
- Change the socket name to "rapl_helper_socket"
- Change the socket to be absFilePath
- I did not add anything to honour the _OFF state, because it is not
necessary to explicitly disable it.
That's about it.
Regards,
Anthony
Anthony Harivel (1):
qemu: Add support for RAPL MSRs feature
docs/formatdomain.rst | 2 ++
src/conf/domain_conf.c | 18 ++++++++++++++++++
src/conf/domain_conf.h | 2 ++
src/conf/schemas/domaincommon.rng | 10 ++++++++++
src/qemu/qemu_command.c | 11 +++++++++++
tests/qemuxmlconfdata/kvm-features-off.xml | 1 +
.../kvm-features.x86_64-latest.args | 2 +-
tests/qemuxmlconfdata/kvm-features.xml | 1 +
8 files changed, 46 insertions(+), 1 deletion(-)
--
2.46.0
6 months
[PATCH V2 0/4] Rework qemu internal active snapshots to use QMP
by Nikolai Barybin
Den, Peter, Daniel thank you for your comments!
I'm sending v2 of this patchset.
Changes since last revision:
- dropped [PATCH 4/4] qemu monitor: reap qemu_monitor_text
- added new patch: qemu capabilities: add QEMU_CAPS_SNAPSHOT_SAVE/_DELETE
- preserved old-style snapshotting (HMP savevm) in case we have QEMU < 6.0
- enhanced requirements for allowing snapshotting. All writable disks
should be qcow2, non-shared. If such disks exist and we have qcow2
NVRAM, add NVRAM device to the list of wrdevs. But never save vmstate
to NVRAM
- make char** wrdevs list allocation inside
qemuSnapshotActiveInternalGetWrdevListHelper()
Nikolai Barybin (4):
qemu monitor: add snaphot-save/delete QMP commands
qemu blockjob: add snapshot-save/delete job types
qemu capabilities: add QEMU_CAPS_SNAPSHOT_SAVE/_DELETE
qemu snapshot: use QMP snapshot-save/delete for internal snapshots
src/qemu/qemu_block.c | 2 +
src/qemu/qemu_blockjob.c | 6 +-
src/qemu/qemu_blockjob.h | 2 +
src/qemu/qemu_capabilities.c | 4 +
src/qemu/qemu_capabilities.h | 2 +
src/qemu/qemu_domain.c | 4 +
src/qemu/qemu_monitor.c | 30 +++
src/qemu/qemu_monitor.h | 13 ++
src/qemu/qemu_monitor_json.c | 66 ++++++
src/qemu/qemu_monitor_json.h | 13 ++
src/qemu/qemu_snapshot.c | 207 ++++++++++++++++--
.../caps_6.0.0_aarch64.xml | 2 +
.../qemucapabilitiesdata/caps_6.0.0_s390x.xml | 2 +
.../caps_6.0.0_x86_64.xml | 2 +
.../caps_6.1.0_x86_64.xml | 2 +
.../caps_6.2.0_aarch64.xml | 2 +
.../qemucapabilitiesdata/caps_6.2.0_ppc64.xml | 2 +
.../caps_6.2.0_x86_64.xml | 2 +
.../caps_7.0.0_aarch64+hvf.xml | 2 +
.../caps_7.0.0_aarch64.xml | 2 +
.../qemucapabilitiesdata/caps_7.0.0_ppc64.xml | 2 +
.../caps_7.0.0_x86_64.xml | 2 +
.../qemucapabilitiesdata/caps_7.1.0_ppc64.xml | 2 +
.../caps_7.1.0_x86_64.xml | 2 +
tests/qemucapabilitiesdata/caps_7.2.0_ppc.xml | 2 +
.../caps_7.2.0_x86_64+hvf.xml | 2 +
.../caps_7.2.0_x86_64.xml | 2 +
.../caps_8.0.0_riscv64.xml | 2 +
.../caps_8.0.0_x86_64.xml | 2 +
.../qemucapabilitiesdata/caps_8.1.0_s390x.xml | 2 +
.../caps_8.1.0_x86_64.xml | 2 +
.../caps_8.2.0_aarch64.xml | 2 +
.../caps_8.2.0_armv7l.xml | 2 +
.../caps_8.2.0_loongarch64.xml | 2 +
.../qemucapabilitiesdata/caps_8.2.0_s390x.xml | 2 +
.../caps_8.2.0_x86_64.xml | 2 +
.../qemucapabilitiesdata/caps_9.0.0_sparc.xml | 2 +
.../caps_9.0.0_x86_64.xml | 2 +
.../caps_9.1.0_x86_64.xml | 2 +
39 files changed, 391 insertions(+), 14 deletions(-)
--
2.43.5
6 months, 1 week
[PATCH 0/2] add NIC hotplug support to test hypervisor
by John Levon
These two patches add basic support for NIC hot[un]plug to the test hypervisor,
based on the qemu driver; only ethernet and bridge type VNICS are currently
supported.
John Levon (2):
test_driver: provide basic NIC hotplug support
test_driver: provide basic NIC hotunplug support
src/test/test_driver.c | 305 ++++++++++++++++++++++++++++++++++++++---
1 file changed, 283 insertions(+), 22 deletions(-)
--
2.34.1
6 months, 1 week
[PATCH v6 00/13] qemu: Introduce shared_filesystems configuration option
by Andrea Bolognani
The need to have something like this in the first place is driven by
KubeVirt (see [1] and [2]). A draft version of this series has been
integrated into KubeVirt and it has been confirmed that it was
effective in removing the need to use LD_PRELOAD hacks in the storage
provider.
Changes from [v5]:
* make migration of domains with TPM work (patches 12 and 13);
* fixed all typos for "remember";
* added R-bs for Peter's patches.
Changes from [v4] (v5 was posted by Peter):
* added patch 7 cleaning up a helper function (noticed just while
reading the code)
* added patch 8 properly unrefing security labels in dac/selinux
drivers on outgoing migration
* patch 11: added handling of the 'nvram' image file (and refactored
the function to
allow reuse)
Changes from [v3] (v4 was posted by Peter):
* patch 2/8 was modified to change the docs for the new option.
* patches 1-5 will get an R-b by me as I've adopted them.
* patches 6, 9-11 are new.
* patches 7, 8 were not part of v3
Changes from [v2]:
* added canonicalization for user-provided paths;
* fixed compilation issues when AppArmor support is enabled.
Changes from [v1]:
* documented more explicitly that the newly introduced option is
intended for very specific scenarios and not general usage; as
part of this, the NEWS update has been dropped too;
* made a few tweaks and addressed a few oversight based on review
feedback;
* several preparatory cleanup patches have been pushed.
Changes from [v0]:
* reworked approach.
[v5] https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/message/H...
[v4] https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/message/F...
[v3] https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/message/P...
[v2] https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/thread/XP...
[v1] https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/thread/XE...
[v0] https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/thread/MM...
[1] https://issues.redhat.com/browse/CNV-34322
[2] https://issues.redhat.com/browse/CNV-39370
Andrea Bolognani (7):
security: Fix alignment
qemu: Introduce shared_filesystems configuration option
qemu: Propagate shared_filesystems
utils: Use overrides in virFileIsSharedFS()
qemu: Always set labels for TPM state
security: Always forget labels for TPM state directory
qemu: Don't lock TPM state directory for incoming migration
Peter Krempa (6):
virFileIsSharedFSOverride: Export
virParseOwnershipIds: Refactor
virSecuritySELinuxRestoreImageLabelInt: Move FD image relabeling after
'migrated' check
security_(dac|selinux): Unref remembered security labels on outgoing
migration
storage_source: Add field for skipping seclabel remembering
qemu: migration: Don't remember seclabel for images shared from
current host
src/conf/storage_source_conf.c | 3 +
src/conf/storage_source_conf.h | 9 ++
src/libvirt_private.syms | 1 +
src/lxc/lxc_controller.c | 3 +-
src/lxc/lxc_driver.c | 2 +-
src/lxc/lxc_process.c | 4 +-
src/qemu/libvirtd_qemu.aug | 3 +
src/qemu/qemu.conf.in | 26 +++++
src/qemu/qemu_conf.c | 31 ++++++
src/qemu/qemu_conf.h | 2 +
src/qemu/qemu_domain.c | 7 +-
src/qemu/qemu_extdevice.c | 2 +-
src/qemu/qemu_migration.c | 86 ++++++++++++++---
src/qemu/qemu_security.c | 95 +++++++++++++-----
src/qemu/qemu_security.h | 6 +-
src/qemu/qemu_tpm.c | 50 ++++++----
src/qemu/qemu_tpm.h | 10 +-
src/qemu/test_libvirtd_qemu.aug.in | 5 +
src/security/security_apparmor.c | 8 +-
src/security/security_dac.c | 53 +++++++++--
src/security/security_driver.h | 8 +-
src/security/security_manager.c | 33 +++++--
src/security/security_manager.h | 9 +-
src/security/security_nop.c | 5 +
src/security/security_selinux.c | 148 +++++++++++++++++++++++------
src/security/security_stack.c | 32 +++++--
src/util/virfile.c | 63 +++++++++++-
src/util/virfile.h | 5 +-
src/util/virutil.c | 20 ++--
tests/securityselinuxlabeltest.c | 2 +-
tests/virfiletest.c | 2 +-
31 files changed, 594 insertions(+), 139 deletions(-)
--
2.46.0
6 months, 1 week
[libvirt PATCH 0/6] scripts: group-qemu-caps: improve readability
by Ján Tomko
Even though it still stays a Perl script at heart.
Ján Tomko (6):
scripts: group-qemu-caps: use read
scripts: group-qemu-caps: remove cryptic bool
scripts: group-qemu-caps: remove unecessary regex
scripts: group-qemu-caps: separate file loading
scripts: group-qemu-caps: regroup_caps: operate on split lines
scripts: group-qemu-caps: separate file operations from the check
scripts/group-qemu-caps.py | 120 +++++++++++++++++++++----------------
1 file changed, 68 insertions(+), 52 deletions(-)
--
2.45.2
6 months, 1 week
[PATCH 0/4] vircommand: Make FD closing more robust on __APPLE__
by Michal Privoznik
Found these on an old branch. Might as well post them.
Michal Prívozník (4):
vircommand: Drop unused arguments from virCommandMassCloseGetFDs*()
vircommand: Isolate FD dir parsing into a separate function
vircommand: Make sysconf(_SC_OPEN_MAX) failure non-fatal
vircommand: Parse /dev/fd on *BSD-like systems when looking for opened
FDs
src/util/vircommand.c | 43 ++++++++++++++++++-------------------------
1 file changed, 18 insertions(+), 25 deletions(-)
--
2.44.2
6 months, 3 weeks
[PATCH 00/14] Introduce fuzzing of XML formats
by Rayhan Faizel
This series introduces multiple fuzzers developed as part of Google Summer
of Code 2024. We adopt a structure-aware fuzzing approach to fuzz libvirt
XML formats. The fuzzing methodology makes use of libFuzzer and
libprotobuf-mutator. The fuzzers work by mutating intermediate protobufs
and converting them to XML.
The fuzzing method in use requires inclusion of C++ sources. However, C++
compilation will be done only if '-Dfuzz' is enabled. Otherwise, libvirt will
compile normally as before. The fuzzing method works only on clang compilers
which support libFuzzer.
This series introduces a total of six fuzzers:
1. QEMU XML domain
2. QEMU XML hotplug
3. CH XML domain
4. VMX XML domain
5. libXL XML domain
6. NWFilter XML
In terms of the number of crashes discovered, QEMU XML domain, QEMU XML
hotplug and libXL fuzzers are the most interesting ones.
The setup process is documented at the end of the series (patch 14).
Rayhan Faizel (14):
src: Tweak source code to allow C++ compilation
meson: Add support for clang/LLVM coverage instrumentation
tests: Export handlers for fake secondary drivers
schemas: Refactor relaxNG schema to ease protobuf conversion
scripts: Add script to convert relaxNG to protobuf
fuzz: Implement base fuzzing setup for XML domain
fuzz: Implement QEMU XML domain fuzzer
fuzz: Implement QEMU XML hotplug fuzzer
ch: Remove unused variables
fuzz: Implement CH XML domain fuzzer
fuzz: Implement VMX XML domain fuzzer
fuzz: Implement libXL XML domain fuzzer
fuzz: Implement NWFilter XML fuzzer
docs: Document the fuzzers
build-aux/syntax-check.mk | 1 +
docs/kbase/index.rst | 3 +
docs/kbase/internals/meson.build | 1 +
docs/kbase/internals/xml-fuzzing.rst | 120 ++++
meson.build | 55 ++
meson_options.txt | 5 +-
scripts/meson.build | 1 +
scripts/relaxng-to-proto.py | 521 ++++++++++++++++++
src/ch/ch_monitor.c | 2 +-
src/ch/ch_monitor.h | 3 +
src/ch/ch_process.c | 2 -
src/conf/domain_conf.c | 18 +-
src/conf/domain_conf.h | 6 +-
src/conf/netdev_vport_profile_conf.c | 2 +-
src/conf/schemas/basictypes.rng | 20 +-
src/conf/schemas/domaincommon.rng | 11 +-
src/conf/schemas/networkcommon.rng | 14 +-
src/qemu/qemu_hotplug.c | 4 +
src/qemu/qemu_monitor.c | 6 +-
src/qemu/qemu_monitor.h | 2 +-
src/util/virfile.h | 2 +-
src/util/virnetdev.h | 12 +-
src/util/virnetdevip.h | 2 +-
src/util/virnetdevmacvlan.h | 2 +-
src/util/virnetdevvportprofile.c | 2 +-
src/util/virnetdevvportprofile.h | 2 +-
src/util/virnvme.c | 4 +-
src/util/virnvme.h | 2 +-
src/util/viruuid.h | 2 +-
tests/commandhelper.c | 8 +-
tests/fuzz/README.rst | 131 +++++
tests/fuzz/ch_xml_domain_fuzz.cc | 157 ++++++
tests/fuzz/libxl_xml_domain_fuzz.cc | 159 ++++++
tests/fuzz/llvm_symbolizer_wrapper.c | 11 +
tests/fuzz/meson.build | 183 ++++++
tests/fuzz/proto_custom_datatypes.cc | 234 ++++++++
tests/fuzz/proto_custom_datatypes.h | 30 +
tests/fuzz/proto_header_common.h | 51 ++
tests/fuzz/proto_to_xml.cc | 277 ++++++++++
tests/fuzz/proto_to_xml.h | 39 ++
tests/fuzz/protos/meson.build | 46 ++
tests/fuzz/protos/xml_datatypes.proto | 93 ++++
tests/fuzz/protos/xml_domain.proto | 62 +++
tests/fuzz/protos/xml_domain_disk_only.proto | 21 +
.../protos/xml_domain_interface_only.proto | 21 +
tests/fuzz/protos/xml_hotplug.proto | 38 ++
tests/fuzz/protos/xml_nwfilter.proto | 9 +
tests/fuzz/qemu_xml_domain_fuzz.cc | 277 ++++++++++
tests/fuzz/qemu_xml_hotplug_fuzz.cc | 340 ++++++++++++
tests/fuzz/run_fuzz.in | 142 +++++
tests/fuzz/vmx_xml_domain_fuzz.cc | 208 +++++++
tests/fuzz/xml_nwfilter_fuzz.cc | 149 +++++
tests/meson.build | 5 +
tests/qemumonitortestutils.c | 48 ++
tests/qemumonitortestutils.h | 6 +
tests/qemuxmlconftest.c | 249 ---------
tests/testutilsqemu.c | 256 +++++++++
tests/testutilsqemu.h | 57 ++
58 files changed, 3832 insertions(+), 302 deletions(-)
create mode 100644 docs/kbase/internals/xml-fuzzing.rst
create mode 100644 scripts/relaxng-to-proto.py
create mode 100644 tests/fuzz/README.rst
create mode 100644 tests/fuzz/ch_xml_domain_fuzz.cc
create mode 100644 tests/fuzz/libxl_xml_domain_fuzz.cc
create mode 100644 tests/fuzz/llvm_symbolizer_wrapper.c
create mode 100644 tests/fuzz/meson.build
create mode 100644 tests/fuzz/proto_custom_datatypes.cc
create mode 100644 tests/fuzz/proto_custom_datatypes.h
create mode 100644 tests/fuzz/proto_header_common.h
create mode 100644 tests/fuzz/proto_to_xml.cc
create mode 100644 tests/fuzz/proto_to_xml.h
create mode 100644 tests/fuzz/protos/meson.build
create mode 100644 tests/fuzz/protos/xml_datatypes.proto
create mode 100644 tests/fuzz/protos/xml_domain.proto
create mode 100644 tests/fuzz/protos/xml_domain_disk_only.proto
create mode 100644 tests/fuzz/protos/xml_domain_interface_only.proto
create mode 100644 tests/fuzz/protos/xml_hotplug.proto
create mode 100644 tests/fuzz/protos/xml_nwfilter.proto
create mode 100644 tests/fuzz/qemu_xml_domain_fuzz.cc
create mode 100644 tests/fuzz/qemu_xml_hotplug_fuzz.cc
create mode 100644 tests/fuzz/run_fuzz.in
create mode 100644 tests/fuzz/vmx_xml_domain_fuzz.cc
create mode 100644 tests/fuzz/xml_nwfilter_fuzz.cc
--
2.34.1
7 months
[PATCH] spec: Fix dtrace BuildRequires on fedora 41+
by Cole Robinson
/usr/bin/dtrace has been split from `systemtap-sdt-devel` into
`systemtap-sdt-dtrace`
It's forward and backward compatible to require the dtrace binary
directly.
We still need the latter dep though, for sdt.h in generated
libvirt_probes.h
Signed-off-by: Cole Robinson <crobinso(a)redhat.com>
---
libvirt.spec.in | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libvirt.spec.in b/libvirt.spec.in
index 29101e74fe..86af13a861 100644
--- a/libvirt.spec.in
+++ b/libvirt.spec.in
@@ -425,8 +425,8 @@ BuildRequires: libcurl-devel
BuildRequires: libwsman-devel >= 2.6.3
%endif
BuildRequires: audit-libs-devel
-# we need /usr/sbin/dtrace
BuildRequires: systemtap-sdt-devel
+BuildRequires: /usr/bin/dtrace
# For mount/umount in FS driver
BuildRequires: util-linux
# For showmount in FS driver (netfs discovery)
--
2.46.0
7 months
Changing permissions for /var/lib/libvirt/images/
by Lee Garrett
Hi everyone,
while using virt-v2v I've hit an issue [0], where essentially virt-v2v fails as
non-root user, due to /var/lib/libvirt/images/ belonging to root:root. I
proposed to change the ownership to root:libvirt, and permission bits to
ug=rwx,o=x, as that would allow users of the libvirt group to use virt-v2v
without running as root.
My questions here are: Are there any downsides to this? AFAICS users of the
libvirt group are allowed changed images via the libvirt API anyway, so from the
security standpoint there should be no change. And if there are none, can we
change the upstream default to those permissions?
Thanks in advance,
Lee
P.S.: Keep me CCed, I'm off-list.
[0] downstream Debian bug with more details: https://bugs.debian.org/1054230
7 months, 1 week
