/*
* Now, the VXLOCK is in force and we're free to destroy the null vnode.
*/
static int
null_reclaim(struct vop_reclaim_args *ap)
{
struct vnode *vp = ap->a_vp;
struct null_node *xp = VTONULL(vp);
struct vnode *lowervp = xp->null_lowervp;
if (lowervp)
null_hashrem(xp);
/*
* Use the interlock to protect the clearing of v_data to
* prevent faults in null_lock().
*/
lockmgr(&vp->v_lock, LK_EXCLUSIVE, NULL);
VI_LOCK(vp);
vp->v_data = NULL;
vp->v_object = NULL;
vp->v_vnlock = &vp->v_lock;
VI_UNLOCK(vp);
if (lowervp)
vput(lowervp);
else
panic("null_reclaim: reclaiming a node with no lowervp");
free(xp, M_NULLFSNODE);
return (0);
}
static int
null_reclaim(struct vnop_reclaim_args * ap)
{
struct vnode * vp;
struct null_node * xp;
struct vnode * lowervp;
struct null_mount * null_mp = MOUNTTONULLMOUNT(vnode_mount(ap->a_vp));
NULLFSDEBUG("%s %p\n", __FUNCTION__, ap->a_vp);
vp = ap->a_vp;
xp = VTONULL(vp);
lowervp = xp->null_lowervp;
lck_mtx_lock(&null_mp->nullm_lock);
vnode_removefsref(vp);
if (lowervp != NULL) {
/* root and second don't have a lowervp, so nothing to release and nothing
* got hashed */
if (xp->null_flags & NULL_FLAG_HASHED) {
/* only call this if we actually made it into the hash list. reclaim gets
called also to
clean up a vnode that got created when it didn't need to under race
conditions */
null_hashrem(xp);
}
vnode_getwithref(lowervp);
vnode_rele(lowervp);
vnode_put(lowervp);
}
if (vp == null_mp->nullm_rootvp) {
null_mp->nullm_rootvp = NULL;
} else if (vp == null_mp->nullm_secondvp) {
null_mp->nullm_secondvp = NULL;
} else if (vp == null_mp->nullm_thirdcovervp) {
null_mp->nullm_thirdcovervp = NULL;
}
lck_mtx_unlock(&null_mp->nullm_lock);
cache_purge(vp);
vnode_clearfsnode(vp);
FREE(xp, M_TEMP);
return 0;
}
