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libvirt/meson_options.txt
Andrea Bolognani 7cbd8c4230 meson: Improve nbdkit configurability 
Currently, nbdkit support will automatically be enabled as long as
the pidfd_open(2) syscall is available. Optionally, libnbd is used
to generate more user-friendly error messages.

In theory this is all good, since use of nbdkit is supposed to be
transparent to the user. In practice, however, there is a problem:
if support for it is enabled at build time and the necessary
runtime components are installed, nbdkit will always be preferred,
with no way for the user to opt out.

This will arguably be fine in the long run, but right now none of
the platforms that we target ships with a SELinux policy that
allows libvirt to launch nbdkit, and the AppArmor policy that we
maintain ourselves hasn't been updated either.

So, in practice, as of today having nbdkit installed on the host
makes network disks completely unusable unless you're willing to
compromise the overall security of the system by disabling
SELinux/AppArmor.

In order to make the transition smoother, provide a convenient
way for users and distro packagers to disable nbdkit support at
compile time until SELinux and AppArmor are ready.

In the process, detection is completely overhauled. libnbd is
made mandatory when nbdkit support is enabled, since availability
across operating systems is comparable and offering users the
option to make error messages worse doesn't make a lot of sense;
we also make sure that an explicit request from the user to
enable/disable nbdkit support is either complied with, or results
in a build failure when that's not possible. Last but not least,
we avoid linking against libnbd when nbdkit support is disabled.

At the RPM level, we disable the feature when building against
anything older than Fedora 40, which still doesn't have the
necessary SELinux bits but will hopefully gain them by the time
it's released. We also allow nbdkit support to be disabled at
build time the same way as other optional features, that is, by
passing "--define '_without_nbdkit 1'" to rpmbuild. Finally, if
nbdkit support has been disabled, installing libvirt will no
longer drag it in as a (weak) dependency.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Jonathon Jongsma <jjongsma@redhat.com>
2023-10-05 22:49:14 +02:00

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option('no_git', type: 'boolean', value: false, description: 'Disable git submodule update')
option('packager', type: 'string', value: '', description: 'Extra packager name')
option('packager_version', type: 'string', value: '', description: 'Extra packager version')
option('system', type: 'boolean', value: false, description: 'Set install paths to system ones')
option('runstatedir', type: 'string', value: '', description: 'State directory for temporary sockets, pid files, etc')
option('initconfdir', type: 'string', value: '', description: 'directory for init script configuration files')
option('expensive_tests', type: 'feature', value: 'auto', description: 'set the default for enabling expensive tests (long timeouts)')
option('test_coverage', type: 'boolean', value: false, description: 'turn on code coverage instrumentation')
option('git_werror', type: 'feature', value: 'auto', description: 'use -Werror if building from GIT')
option('rpath', type: 'feature', value: 'auto', description: 'whether to include rpath information in installed binaries and libraries')
option('docdir', type: 'string', value: '', description: 'documentation installation directory')
option('docs', type: 'feature', value: 'auto', description: 'whether to generate documentation')
option('tests', type: 'feature', value: 'auto', description: 'whether to build tests')
# build dependencies options
option('apparmor', type: 'feature', value: 'auto', description: 'apparmor support')
option('attr', type: 'feature', value: 'auto', description: 'attr support')
option('audit', type: 'feature', value: 'auto', description: 'audit support')
option('bash_completion', type: 'feature', value: 'auto', description: 'bash-completion support')
option('bash_completion_dir', type: 'string', value: '', description: 'directory containing bash completion scripts')
option('blkid', type: 'feature', value: 'auto', description: 'blkid support')
option('capng', type: 'feature', value: 'auto', description: 'cap-ng support')
option('curl', type: 'feature', value: 'auto', description: 'curl support')
option('fuse', type: 'feature', value: 'auto', description: 'fuse support')
option('glusterfs', type: 'feature', value: 'auto', description: 'glusterfs support')
option('libiscsi', type: 'feature', value: 'auto', description: 'libiscsi support')
option('libnl', type: 'feature', value: 'auto', description: 'libnl support')
option('libpcap', type: 'feature', value: 'auto', description: 'libpcap support')
option('libssh', type: 'feature', value: 'auto', description: 'libssh support')
option('libssh2', type: 'feature', value: 'auto', description: 'libssh2 support')
option('netcf', type: 'feature', value: 'auto', description: 'netcf support')
option('nls', type: 'feature', value: 'auto', description: 'nls support')
option('numactl', type: 'feature', value: 'auto', description: 'numactl support')
option('openwsman', type: 'feature', value: 'auto', description: 'openwsman support')
option('pciaccess', type: 'feature', value: 'auto', description: 'pciaccess support')
option('polkit', type: 'feature', value: 'auto', description: 'use PolicyKit for UNIX socket access checks')
option('readline', type: 'feature', value: 'auto', description: 'readline support')
option('sanlock', type: 'feature', value: 'auto', description: 'sanlock support')
option('sasl', type: 'feature', value: 'auto', description: 'sasl support')
option('selinux', type: 'feature', value: 'auto', description: 'selinux support')
option('selinux_mount', type: 'string', value: '', description: 'set SELinux mount point')
option('udev', type: 'feature', value: 'auto', description: 'udev support')
option('wireshark_dissector', type: 'feature', value: 'auto', description: 'wireshark support')
option('wireshark_plugindir', type: 'string', value: '', description: 'wireshark plugins directory for use when installing wireshark plugin')
option('yajl', type: 'feature', value: 'auto', description: 'yajl support')
# build driver options
option('driver_bhyve', type: 'feature', value: 'auto', description: 'bhyve driver')
option('driver_esx', type: 'feature', value: 'auto', description: 'esx driver')
option('driver_hyperv', type: 'feature', value: 'auto', description: 'Hyper-V driver')
option('driver_interface', type: 'feature', value: 'auto', description: 'host interface driver')
option('driver_libvirtd', type: 'feature', value: 'auto', description: 'libvirtd driver')
option('driver_libxl', type: 'feature', value: 'auto', description: 'libxenlight driver')
option('driver_lxc', type: 'feature', value: 'auto', description: 'Linux Container driver')
option('driver_ch', type: 'feature', value: 'auto', description: 'Cloud-Hypervisor driver')
option('ch_user', type: 'string', value: '', description: 'username to run Cloud-Hypervisor system instance as')
option('ch_group', type: 'string', value: '', description: 'groupname to run Cloud-Hypervisor system instance as')
option('driver_network', type: 'feature', value: 'auto', description: 'virtual network driver')
option('driver_openvz', type: 'feature', value: 'auto', description: 'OpenVZ driver')
option('driver_qemu', type: 'feature', value: 'auto', description: 'QEMU/KVM driver')
option('qemu_user', type: 'string', value: '', description: 'username to run QEMU system instance as')
option('qemu_group', type: 'string', value: '', description: 'groupname to run QEMU system instance as')
option('qemu_moddir', type: 'string', value: '', description: 'set the directory where QEMU modules are located')
option('qemu_datadir', type: 'string', value: '', description: 'set the directory where QEMU shared data is located')
option('driver_remote', type: 'feature', value: 'auto', description: 'remote driver')
option('remote_default_mode', type: 'combo', choices: ['legacy', 'direct'], value: 'direct', description: 'remote driver default mode')
option('driver_secrets', type: 'feature', value: 'auto', description: 'local secrets management driver')
option('driver_test', type: 'feature', value: 'auto', description: 'test driver')
option('driver_vbox', type: 'feature', value: 'auto', description: 'VirtualBox XPCOMC driver')
option('vbox_xpcomc_dir', type: 'string', value: '', description: 'Location of directory containing VirtualBox XPCOMC library')
option('driver_vmware', type: 'feature', value: 'auto', description: 'VMware driver')
option('driver_vz', type: 'feature', value: 'auto', description: 'Virtuozzo driver')
option('secdriver_apparmor', type: 'feature', value: 'auto', description: 'use AppArmor security driver')
option('apparmor_profiles', type: 'feature', value: 'auto', description: 'install apparmor profiles')
option('secdriver_selinux', type: 'feature', value: 'auto', description: 'use SELinux security driver')
# storage driver options
option('storage_dir', type: 'feature', value: 'auto', description: 'directory backend for the storage driver')
option('storage_disk', type: 'feature', value: 'auto', description: 'GPartd Disk backend for the storage driver')
option('storage_fs', type: 'feature', value: 'auto', description: 'FileSystem backend for the storage driver')
option('storage_gluster', type: 'feature', value: 'auto', description: 'Gluster backend for the storage driver')
option('storage_iscsi', type: 'feature', value: 'auto', description: 'iscsi backend for the storage driver')
option('storage_iscsi_direct', type: 'feature', value: 'auto', description: 'iscsi-direct backend for the storage driver')
option('storage_lvm', type: 'feature', value: 'auto', description: 'LVM backend for the storage driver')
option('storage_mpath', type: 'feature', value: 'auto', description: 'mpath backend for the storage driver')
option('storage_rbd', type: 'feature', value: 'auto', description: 'RADOS Block Device backend for the storage driver')
option('storage_scsi', type: 'feature', value: 'auto', description: 'SCSI backend for the storage driver')
option('storage_vstorage', type: 'feature', value: 'auto', description: 'Virtuozzo storage backend for the storage driver')
option('storage_zfs', type: 'feature', value: 'auto', description: 'ZFS backend for the storage driver')
# build feature options
option('chrdev_lock_files', type: 'string', value: '', description: 'location for UUCP style lock files for character devices (leave empty for default paths on some platforms)')
option('dtrace', type: 'feature', value: 'auto', description: 'use dtrace for static probing')
option('firewalld', type: 'feature', value: 'auto', description: 'firewalld support')
option('firewalld_zone', type: 'feature', value: 'auto', description: 'whether to install firewalld libvirt zone')
option('host_validate', type: 'feature', value: 'auto', description: 'build virt-host-validate')
option('init_script', type: 'combo', choices: ['systemd', 'openrc', 'check', 'none'], value: 'check', description: 'Style of init script to install')
option('loader_nvram', type: 'string', value: '', description: 'Pass list of pairs of <loader>:<nvram> paths. Both pairs and list items are separated by a colon.')
option('login_shell', type: 'feature', value: 'auto', description: 'build virt-login-shell')
option('nss', type: 'feature', value: 'auto', description: 'enable Name Service Switch plugin for resolving guest IP addresses')
option('numad', type: 'feature', value: 'auto', description: 'use numad to manage CPU placement dynamically')
option('nbdkit', type: 'feature', value: 'auto', description: 'use nbdkit to access network disks')
option('pm_utils', type: 'feature', value: 'auto', description: 'use pm-utils for power management')
option('sysctl_config', type: 'feature', value: 'auto', description: 'Whether to install sysctl configs')
option('tls_priority', type: 'string', value: 'NORMAL', description: 'set the default TLS session priority string')
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