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Detach GELI providers on shutdown/reboot, which will allow providers underneath

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to close properly.

Reported, reviewed and tested by:	guido
MFC after:	1 week
This commit is contained in:
Pawel Jakub Dawidek 2009-03-16 19:31:08 +00:00
parent 6443904ee1
commit c5d387d010
1 changed files with 55 additions and 1 deletions
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56
sys/geom/eli/g_eli.c
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@ -37,6 +37,7 @@ __FBSDID("$FreeBSD$");
#include <sys/bio.h>
#include <sys/sysctl.h>
#include <sys/malloc.h>
#include <sys/eventhandler.h>
#include <sys/kthread.h>
#include <sys/proc.h>
#include <sys/sched.h>
@ -81,8 +82,12 @@ TUNABLE_INT("kern.geom.eli.batch", &g_eli_batch);
SYSCTL_UINT(_kern_geom_eli, OID_AUTO, batch, CTLFLAG_RW, &g_eli_batch, 0,
"Use crypto operations batching");
static eventhandler_tag g_eli_pre_sync = NULL;
static int g_eli_destroy_geom(struct gctl_req *req, struct g_class *mp,
struct g_geom *gp);
static void g_eli_init(struct g_class *mp);
static void g_eli_fini(struct g_class *mp);
static g_taste_t g_eli_taste;
static g_dumpconf_t g_eli_dumpconf;
@ -92,7 +97,9 @@ struct g_class g_eli_class = {
.version = G_VERSION,
.ctlreq = g_eli_config,
.taste = g_eli_taste,
.destroy_geom = g_eli_destroy_geom
.destroy_geom = g_eli_destroy_geom,
.init = g_eli_init,
.fini = g_eli_fini
};
@ -1075,5 +1082,52 @@ g_eli_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp,
g_eli_algo2str(sc->sc_ealgo));
}
static void
g_eli_shutdown_pre_sync(void *arg, int howto)
{
struct g_class *mp;
struct g_geom *gp, *gp2;
struct g_provider *pp;
struct g_eli_softc *sc;
int error;
mp = arg;
DROP_GIANT();
g_topology_lock();
LIST_FOREACH_SAFE(gp, &mp->geom, geom, gp2) {
sc = gp->softc;
if (sc == NULL)
continue;
pp = LIST_FIRST(&gp->provider);
KASSERT(pp != NULL, ("No provider? gp=%p (%s)", gp, gp->name));
if (pp->acr + pp->acw + pp->ace == 0)
error = g_eli_destroy(sc, 1);
else {
sc->sc_flags |= G_ELI_FLAG_RW_DETACH;
gp->access = g_eli_access;
}
}
g_topology_unlock();
PICKUP_GIANT();
}
static void
g_eli_init(struct g_class *mp)
{
g_eli_pre_sync = EVENTHANDLER_REGISTER(shutdown_pre_sync,
g_eli_shutdown_pre_sync, mp, SHUTDOWN_PRI_FIRST);
if (g_eli_pre_sync == NULL)
G_ELI_DEBUG(0, "Warning! Cannot register shutdown event.");
}
static void
g_eli_fini(struct g_class *mp)
{
if (g_eli_pre_sync != NULL)
EVENTHANDLER_DEREGISTER(shutdown_pre_sync, g_eli_pre_sync);
}
DECLARE_GEOM_CLASS(g_eli_class, g_eli);
MODULE_DEPEND(g_eli, crypto, 1, 1, 1);