Re: [libvirt] [PATCH v3 19/28] qemu_conf: Introduce metadata_lock_manager

This config option allows users to set and enable lock manager for domain metadata. The lock manager is going to be used by security drivers to serialize each other when changing a file ownership or changing the SELinux label. The only supported lock manager is 'lockd' for now. Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com&gt; --- src/qemu/libvirtd_qemu.aug | 1 + src/qemu/qemu.conf | 6 ++++++ src/qemu/qemu_conf.c | 13 +++++++++++++ src/qemu/qemu_conf.h | 1 + src/qemu/test_libvirtd_qemu.aug.in | 1 + 5 files changed, 22 insertions(+) diff --git a/src/qemu/libvirtd_qemu.aug b/src/qemu/libvirtd_qemu.aug index ddc4bbfd1d..42e325d4fb 100644 --- a/src/qemu/libvirtd_qemu.aug +++ b/src/qemu/libvirtd_qemu.aug @@ -98,6 +98,7 @@ module Libvirtd_qemu = | bool_entry "relaxed_acs_check" | bool_entry "allow_disk_format_probing" | str_entry "lock_manager" + | str_entry "metadata_lock_manager" let rpc_entry = int_entry "max_queued" | int_entry "keepalive_interval" diff --git a/src/qemu/qemu.conf b/src/qemu/qemu.conf index cd57b3cc69..06caa39232 100644 --- a/src/qemu/qemu.conf +++ b/src/qemu/qemu.conf @@ -659,6 +659,12 @@ #lock_manager = "lockd" +# To serialize two daemons trying to change metadata on a file,

+# libvirt offers a locking mechanism. Currently, only "lockd" is +# supported (or no locking at all if unset). +# +#metadata_lock_manager = "lockd" +