82 nullfs_mount(struct mount *mp)  in nullfs_mount()  argument
93 	NULLFSDEBUG("nullfs_mount(mp = %p)\n", (void *)mp);  in nullfs_mount()
95 	if (mp->mnt_flag & MNT_ROOTFS)  in nullfs_mount()
101 	if (mp->mnt_flag & MNT_UPDATE) {  in nullfs_mount()
105 		if (vfs_flagopt(mp->mnt_optnew, "export", NULL, 0))  in nullfs_mount()
114 	error = vfs_getopt(mp->mnt_optnew, "from", (void **)&target, &len);  in nullfs_mount()
116 		error = vfs_getopt(mp->mnt_optnew, "target", (void **)&target, &len);  in nullfs_mount()
123 	if (mp->mnt_vnodecovered->v_op == &null_vnodeops &&  in nullfs_mount()
124 	    VOP_ISLOCKED(mp->mnt_vnodecovered) == LK_EXCLUSIVE) {  in nullfs_mount()
125 		VOP_UNLOCK(mp->mnt_vnodecovered);  in nullfs_mount()
143 		vn_lock(mp->mnt_vnodecovered, LK_EXCLUSIVE | LK_RETRY);  in nullfs_mount()
157 	if (mp->mnt_vnodecovered->v_op == &null_vnodeops) {  in nullfs_mount()
158 		nn = VTONULL(mp->mnt_vnodecovered);  in nullfs_mount()
171 	    lowerrootvp->v_type != mp->mnt_vnodecovered->v_type) {  in nullfs_mount()
184 	xmp->nullm_vfs = vfs_register_upper_from_vp(lowerrootvp, mp,  in nullfs_mount()
193 	mp->mnt_data = xmp;  in nullfs_mount()
198 	error = null_nodeget(mp, lowerrootvp, &nullm_rootvp);  in nullfs_mount()
207 		MNT_ILOCK(mp);  in nullfs_mount()
208 		mp->mnt_flag |= MNT_LOCAL;  in nullfs_mount()
209 		MNT_IUNLOCK(mp);  in nullfs_mount()
212 	if (vfs_getopt(mp->mnt_optnew, "cache", NULL, NULL) == 0) {  in nullfs_mount()
214 	} else if (vfs_getopt(mp->mnt_optnew, "nocache", NULL, NULL) == 0) {  in nullfs_mount()
222 		vfs_register_for_notification(xmp->nullm_vfs, mp,  in nullfs_mount()
226 	if (lowerrootvp == mp->mnt_vnodecovered) {  in nullfs_mount()
232 	MNT_ILOCK(mp);  in nullfs_mount()
234 		mp->mnt_kern_flag |= lowerrootvp->v_mount->mnt_kern_flag &  in nullfs_mount()
238 	mp->mnt_kern_flag |= MNTK_NOMSYNC | MNTK_UNLOCKED_INSMNTQUE;  in nullfs_mount()
239 	mp->mnt_kern_flag |= lowerrootvp->v_mount->mnt_kern_flag &  in nullfs_mount()
241 	MNT_IUNLOCK(mp);  in nullfs_mount()
242 	vfs_getnewfsid(mp);  in nullfs_mount()
243 	vfs_mountedfrom(mp, target);  in nullfs_mount()
247 		mp->mnt_stat.f_mntfromname, mp->mnt_stat.f_mntonname);  in nullfs_mount()
255 nullfs_unmount(struct mount *mp, int mntflags)  in nullfs_unmount()  argument
260 	NULLFSDEBUG("nullfs_unmount: mp = %p\n", (void *)mp);  in nullfs_unmount()
269 		error = vflush(mp, 0, flags, curthread);  in nullfs_unmount()
272 		MNT_ILOCK(mp);  in nullfs_unmount()
273 		if (mp->mnt_nvnodelistsize == 0) {  in nullfs_unmount()
274 			MNT_IUNLOCK(mp);  in nullfs_unmount()
277 		MNT_IUNLOCK(mp);  in nullfs_unmount()
285 	mntdata = mp->mnt_data;  in nullfs_unmount()
290 	if (mntdata->nullm_lowerrootvp == mp->mnt_vnodecovered) {  in nullfs_unmount()
291 		vn_lock(mp->mnt_vnodecovered, LK_EXCLUSIVE | LK_RETRY | LK_CANRECURSE);  in nullfs_unmount()
292 		mp->mnt_vnodecovered->v_vflag &= ~VV_CROSSLOCK;  in nullfs_unmount()
293 		VOP_UNLOCK(mp->mnt_vnodecovered);  in nullfs_unmount()
297 	mp->mnt_data = NULL;  in nullfs_unmount()
303 nullfs_root(struct mount *mp, int flags, struct vnode **vpp)  in nullfs_root()  argument
309 	mntdata = MOUNTTONULLMOUNT(mp);  in nullfs_root()
310 	NULLFSDEBUG("nullfs_root(mp = %p, vp = %p)\n", mp,  in nullfs_root()
315 		error = null_nodeget(mp, mntdata->nullm_lowerrootvp, &vp);  in nullfs_root()
324 nullfs_quotactl(struct mount *mp, int cmd, uid_t uid, void *arg, bool *mp_busy)  in nullfs_quotactl()  argument
331 	mntdata = MOUNTTONULLMOUNT(mp);  in nullfs_quotactl()
342 	vfs_unbusy(mp);  in nullfs_quotactl()
355 nullfs_statfs(struct mount *mp, struct statfs *sbp)  in nullfs_statfs()  argument
360 	NULLFSDEBUG("nullfs_statfs(mp = %p, vp = %p->%p)\n", (void *)mp,  in nullfs_statfs()
361 	    (void *)MOUNTTONULLMOUNT(mp)->nullm_rootvp,  in nullfs_statfs()
362 	    (void *)NULLVPTOLOWERVP(MOUNTTONULLMOUNT(mp)->nullm_rootvp));  in nullfs_statfs()
366 	error = VFS_STATFS(MOUNTTONULLMOUNT(mp)->nullm_vfs, mstat);  in nullfs_statfs()
391 nullfs_sync(struct mount *mp, int waitfor)  in nullfs_sync()  argument
400 nullfs_vget(struct mount *mp, ino_t ino, int flags, struct vnode **vpp)  in nullfs_vget()  argument
407 	error = VFS_VGET(MOUNTTONULLMOUNT(mp)->nullm_vfs, ino, flags, vpp);  in nullfs_vget()
410 	return (null_nodeget(mp, *vpp, vpp));  in nullfs_vget()
414 nullfs_fhtovp(struct mount *mp, struct fid *fidp, int flags, struct vnode **vpp)  in nullfs_fhtovp()  argument
418 	error = VFS_FHTOVP(MOUNTTONULLMOUNT(mp)->nullm_vfs, fidp, flags,  in nullfs_fhtovp()
422 	return (null_nodeget(mp, *vpp, vpp));  in nullfs_fhtovp()
426 nullfs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp,  in nullfs_extattrctl()  argument
430 	return (VFS_EXTATTRCTL(MOUNTTONULLMOUNT(mp)->nullm_vfs, cmd,  in nullfs_extattrctl()
435 nullfs_reclaim_lowervp(struct mount *mp, struct vnode *lowervp)  in nullfs_reclaim_lowervp()  argument
439 	vp = null_hashget(mp, lowervp);  in nullfs_reclaim_lowervp()
448 nullfs_unlink_lowervp(struct mount *mp, struct vnode *lowervp)  in nullfs_unlink_lowervp()  argument
453 	vp = null_hashget(mp, lowervp);  in nullfs_unlink_lowervp()