/*
* Clean up the unionfs node.
*/
void
unionfs_noderem(struct vnode *vp, struct thread *td)
{
int vfslocked;
int count;
struct unionfs_node *unp, *unp_t1, *unp_t2;
struct unionfs_node_hashhead *hd;
struct unionfs_node_status *unsp, *unsp_tmp;
struct vnode *lvp;
struct vnode *uvp;
struct vnode *dvp;
/*
* Use the interlock to protect the clearing of v_data to
* prevent faults in unionfs_lock().
*/
VI_LOCK(vp);
unp = VTOUNIONFS(vp);
lvp = unp->un_lowervp;
uvp = unp->un_uppervp;
dvp = unp->un_dvp;
unp->un_lowervp = unp->un_uppervp = NULLVP;
vp->v_vnlock = &(vp->v_lock);
vp->v_data = NULL;
lockmgr(vp->v_vnlock, LK_EXCLUSIVE | LK_INTERLOCK, VI_MTX(vp), td);
if (lvp != NULLVP)
VOP_UNLOCK(lvp, 0, td);
if (uvp != NULLVP)
VOP_UNLOCK(uvp, 0, td);
vp->v_object = NULL;
if (dvp != NULLVP && unp->un_hash.le_prev != NULL)
unionfs_rem_cached_vnode(unp, dvp);
if (lvp != NULLVP) {
vfslocked = VFS_LOCK_GIANT(lvp->v_mount);
vrele(lvp);
VFS_UNLOCK_GIANT(vfslocked);
}
if (uvp != NULLVP) {
vfslocked = VFS_LOCK_GIANT(uvp->v_mount);
vrele(uvp);
VFS_UNLOCK_GIANT(vfslocked);
}
if (dvp != NULLVP) {
vfslocked = VFS_LOCK_GIANT(dvp->v_mount);
vrele(dvp);
VFS_UNLOCK_GIANT(vfslocked);
unp->un_dvp = NULLVP;
}
if (unp->un_path != NULL) {
free(unp->un_path, M_UNIONFSPATH);
unp->un_path = NULL;
}
if (unp->un_hashtbl != NULL) {
for (count = 0; count <= unp->un_hashmask; count++) {
hd = unp->un_hashtbl + count;
LIST_FOREACH_SAFE(unp_t1, hd, un_hash, unp_t2) {
LIST_REMOVE(unp_t1, un_hash);
unp_t1->un_hash.le_next = NULL;
unp_t1->un_hash.le_prev = NULL;
}
}
hashdestroy(unp->un_hashtbl, M_UNIONFSHASH, unp->un_hashmask);
}
/*
* Clean up the unionfs node.
*/
void
unionfs_noderem(struct vnode *vp, struct thread *td)
{
int count;
struct unionfs_node *unp, *unp_t1, *unp_t2;
struct unionfs_node_hashhead *hd;
struct unionfs_node_status *unsp, *unsp_tmp;
struct vnode *lvp;
struct vnode *uvp;
struct vnode *dvp;
/*
* Use the interlock to protect the clearing of v_data to
* prevent faults in unionfs_lock().
*/
VI_LOCK(vp);
unp = VTOUNIONFS(vp);
lvp = unp->un_lowervp;
uvp = unp->un_uppervp;
dvp = unp->un_dvp;
unp->un_lowervp = unp->un_uppervp = NULLVP;
vp->v_vnlock = &(vp->v_lock);
vp->v_data = NULL;
vp->v_object = NULL;
VI_UNLOCK(vp);
if (lvp != NULLVP)
VOP_UNLOCK(lvp, LK_RELEASE);
if (uvp != NULLVP)
VOP_UNLOCK(uvp, LK_RELEASE);
if (dvp != NULLVP && unp->un_hash.le_prev != NULL)
unionfs_rem_cached_vnode(unp, dvp);
if (lockmgr(vp->v_vnlock, LK_EXCLUSIVE, VI_MTX(vp)) != 0)
panic("the lock for deletion is unacquirable.");
if (lvp != NULLVP)
vrele(lvp);
if (uvp != NULLVP)
vrele(uvp);
if (dvp != NULLVP) {
vrele(dvp);
unp->un_dvp = NULLVP;
}
if (unp->un_path != NULL) {
free(unp->un_path, M_UNIONFSPATH);
unp->un_path = NULL;
}
if (unp->un_hashtbl != NULL) {
for (count = 0; count <= unp->un_hashmask; count++) {
hd = unp->un_hashtbl + count;
LIST_FOREACH_SAFE(unp_t1, hd, un_hash, unp_t2) {
LIST_REMOVE(unp_t1, un_hash);
unp_t1->un_hash.le_next = NULL;
unp_t1->un_hash.le_prev = NULL;
}
}
hashdestroy(unp->un_hashtbl, M_UNIONFSHASH, unp->un_hashmask);
}
