Provided by: freebsd-manpages_8.2-1_all
g_wither_geom -- destroy geom and related providers and consumers when
you get a chance
g_wither_geom(struct g_geom *gp, int error);
The g_wither_geom() function tells GEOM that geom gp is to be destroyed.
GEOM sets an error on each provider of the given geom (in the orphaning
process) and waits for a chance to destroy the geom. If the access count
of any possessed consumer goes to 0, the consumer will be detached and
destroyed automatically. If the last consumer attached to any possessed
provider will be detached, the provider will be destroyed. If there are
no more providers nor consumers, the geom will be destroyed.
This is an automatic ``garbage collect'' to avoid duplicated code in all
classes. Before it is called, field softc should be disposed off and set
to NULL. Note that the g_wither_geom() function gives no guarantee that
the geom will be immediately destroyed, mostly because the access counts
of the geom's consumers and providers may not be 0. That is why calling
this function for every geom from a given class is not enough to be sure
that the class can be unloaded.
The argument error must be nonzero.
The topology lock has to be held.
geom(4), DECLARE_GEOM_CLASS(9), g_access(9), g_attach(9), g_bio(9),
g_consumer(9), g_data(9), g_event(9), g_geom(9), g_provider(9),
This manual page was written by Pawel Jakub Dawidek <pjd@FreeBSD.org>.