On Thu, Dec 15, 2022 at 07:50:43AM -0800, Andrea Bolognani wrote: > On Wed, Dec 14, 2022 at 02:55:30PM -0700, Jim Fehlig wrote: > > On 12/14/22 11:08, Andrea Bolognani wrote: > > > On Tue, Dec 13, 2022 at 05:31:02PM -0700, Jim Fehlig wrote: > > > > +* libvirt-daemon-plugin-lockd > > > > + This package provides the lockd.so module, a daemon plugin for communicating > > > > + with a virtlockd configured to use POSIX fcntl advisory locks. > > > > + > > > > +* libvirt-daemon-plugin-sanlock > > > > + This package provides the sanlock.so module, a daemon plugin for communicating > > > > + with a virtlockd configured to use sanlock. > > > > > > Based on Dan's explanation, these descriptions are not accurate: the > > > lockd.so module is used by the hypervisor driver to manage locks via > > > virtlockd, while the sanlock.so to do the same via sanlock. > > > > I think the first one is accurate. lockd.so is a plugin for daemons to > > communicate with virtlockd. Daniel wrote > > > > "virtqemud locks(sic) the lockd.so plugin, as lockd.so > > provides the client impl to talk to virtlockd. Think of lockd.so > > as being equiv of libvirt.so". > > > > I assume sanlock.so is the same. It provides the client impl for daemons to > > talk to virtlockd's sanlock backend. Regardless, suggestions on the actual > > text to put here would be much appreciated. > > My understanding is that configuring the hypervisor driver to use > sanlock results in it loading the sanlock.so plugin and calling out > to sanlock directly, without going through virtlockd. virlockd is > used when lockd.so is loaded. Basically the plugins provide the > implementation of the locking interface, with the backend being > sanlock and virtlockd respectively. Yes, sanlock has its own daemon that's the equivalent of virtlockd. Libvirt only needs to proivde the client side of sanlock (our plugin). With regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|
