78 nullfs_mount(struct mount *mp)  in nullfs_mount()  argument
89 	NULLFSDEBUG("nullfs_mount(mp = %p)\n", (void *)mp);  in nullfs_mount()
91 	if (mp->mnt_flag & MNT_ROOTFS)  in nullfs_mount()
97 	if (mp->mnt_flag & MNT_UPDATE) {  in nullfs_mount()
101 		if (vfs_flagopt(mp->mnt_optnew, "export", NULL, 0))  in nullfs_mount()
110 	error = vfs_getopt(mp->mnt_optnew, "from", (void **)&target, &len);  in nullfs_mount()
112 		error = vfs_getopt(mp->mnt_optnew, "target", (void **)&target, &len);  in nullfs_mount()
119 	if (mp->mnt_vnodecovered->v_op == &null_vnodeops &&  in nullfs_mount()
120 	    VOP_ISLOCKED(mp->mnt_vnodecovered) == LK_EXCLUSIVE) {  in nullfs_mount()
121 		VOP_UNLOCK(mp->mnt_vnodecovered);  in nullfs_mount()
139 		vn_lock(mp->mnt_vnodecovered, LK_EXCLUSIVE | LK_RETRY);  in nullfs_mount()
153 	if (mp->mnt_vnodecovered->v_op == &null_vnodeops) {  in nullfs_mount()
154 		nn = VTONULL(mp->mnt_vnodecovered);  in nullfs_mount()
167 	    lowerrootvp->v_type != mp->mnt_vnodecovered->v_type) {  in nullfs_mount()
180 	xmp->nullm_vfs = vfs_register_upper_from_vp(lowerrootvp, mp,  in nullfs_mount()
189 	mp->mnt_data = xmp;  in nullfs_mount()
194 	error = null_nodeget(mp, lowerrootvp, &nullm_rootvp);  in nullfs_mount()
203 		MNT_ILOCK(mp);  in nullfs_mount()
204 		mp->mnt_flag |= MNT_LOCAL;  in nullfs_mount()
205 		MNT_IUNLOCK(mp);  in nullfs_mount()
208 	if (vfs_getopt(mp->mnt_optnew, "cache", NULL, NULL) == 0) {  in nullfs_mount()
210 	} else if (vfs_getopt(mp->mnt_optnew, "nocache", NULL, NULL) == 0) {  in nullfs_mount()
218 		vfs_register_for_notification(xmp->nullm_vfs, mp,  in nullfs_mount()
222 	if (lowerrootvp == mp->mnt_vnodecovered) {  in nullfs_mount()
228 	MNT_ILOCK(mp);  in nullfs_mount()
230 		mp->mnt_kern_flag |= lowerrootvp->v_mount->mnt_kern_flag &  in nullfs_mount()
234 	mp->mnt_kern_flag |= MNTK_NOMSYNC | MNTK_UNLOCKED_INSMNTQUE;  in nullfs_mount()
235 	mp->mnt_kern_flag |= lowerrootvp->v_mount->mnt_kern_flag &  in nullfs_mount()
237 	MNT_IUNLOCK(mp);  in nullfs_mount()
238 	vfs_getnewfsid(mp);  in nullfs_mount()
239 	vfs_mountedfrom(mp, target);  in nullfs_mount()
243 		mp->mnt_stat.f_mntfromname, mp->mnt_stat.f_mntonname);  in nullfs_mount()
251 nullfs_unmount(struct mount *mp, int mntflags)  in nullfs_unmount()  argument
256 	NULLFSDEBUG("nullfs_unmount: mp = %p\n", (void *)mp);  in nullfs_unmount()
265 		error = vflush(mp, 0, flags, curthread);  in nullfs_unmount()
268 		MNT_ILOCK(mp);  in nullfs_unmount()
269 		if (mp->mnt_nvnodelistsize == 0) {  in nullfs_unmount()
270 			MNT_IUNLOCK(mp);  in nullfs_unmount()
273 		MNT_IUNLOCK(mp);  in nullfs_unmount()
281 	mntdata = mp->mnt_data;  in nullfs_unmount()
286 	if (mntdata->nullm_lowerrootvp == mp->mnt_vnodecovered) {  in nullfs_unmount()
287 		vn_lock(mp->mnt_vnodecovered, LK_EXCLUSIVE | LK_RETRY | LK_CANRECURSE);  in nullfs_unmount()
288 		mp->mnt_vnodecovered->v_vflag &= ~VV_CROSSLOCK;  in nullfs_unmount()
289 		VOP_UNLOCK(mp->mnt_vnodecovered);  in nullfs_unmount()
293 	mp->mnt_data = NULL;  in nullfs_unmount()
299 nullfs_root(struct mount *mp, int flags, struct vnode **vpp)  in nullfs_root()  argument
305 	mntdata = MOUNTTONULLMOUNT(mp);  in nullfs_root()
306 	NULLFSDEBUG("nullfs_root(mp = %p, vp = %p)\n", mp,  in nullfs_root()
311 		error = null_nodeget(mp, mntdata->nullm_lowerrootvp, &vp);  in nullfs_root()
320 nullfs_quotactl(struct mount *mp, int cmd, uid_t uid, void *arg, bool *mp_busy)  in nullfs_quotactl()  argument
327 	mntdata = MOUNTTONULLMOUNT(mp);  in nullfs_quotactl()
338 	vfs_unbusy(mp);  in nullfs_quotactl()
351 nullfs_statfs(struct mount *mp, struct statfs *sbp)  in nullfs_statfs()  argument
356 	NULLFSDEBUG("nullfs_statfs(mp = %p, vp = %p->%p)\n", (void *)mp,  in nullfs_statfs()
357 	    (void *)MOUNTTONULLMOUNT(mp)->nullm_rootvp,  in nullfs_statfs()
358 	    (void *)NULLVPTOLOWERVP(MOUNTTONULLMOUNT(mp)->nullm_rootvp));  in nullfs_statfs()
362 	error = VFS_STATFS(MOUNTTONULLMOUNT(mp)->nullm_vfs, mstat);  in nullfs_statfs()
382 nullfs_sync(struct mount *mp, int waitfor)  in nullfs_sync()  argument
391 nullfs_vget(struct mount *mp, ino_t ino, int flags, struct vnode **vpp)  in nullfs_vget()  argument
398 	error = VFS_VGET(MOUNTTONULLMOUNT(mp)->nullm_vfs, ino, flags, vpp);  in nullfs_vget()
401 	return (null_nodeget(mp, *vpp, vpp));  in nullfs_vget()
405 nullfs_fhtovp(struct mount *mp, struct fid *fidp, int flags, struct vnode **vpp)  in nullfs_fhtovp()  argument
409 	error = VFS_FHTOVP(MOUNTTONULLMOUNT(mp)->nullm_vfs, fidp, flags,  in nullfs_fhtovp()
413 	return (null_nodeget(mp, *vpp, vpp));  in nullfs_fhtovp()
417 nullfs_extattrctl(struct mount *mp, int cmd, struct vnode *filename_vp,  in nullfs_extattrctl()  argument
421 	return (VFS_EXTATTRCTL(MOUNTTONULLMOUNT(mp)->nullm_vfs, cmd,  in nullfs_extattrctl()
426 nullfs_reclaim_lowervp(struct mount *mp, struct vnode *lowervp)  in nullfs_reclaim_lowervp()  argument
430 	vp = null_hashget(mp, lowervp);  in nullfs_reclaim_lowervp()
439 nullfs_unlink_lowervp(struct mount *mp, struct vnode *lowervp)  in nullfs_unlink_lowervp()  argument
444 	vp = null_hashget(mp, lowervp);  in nullfs_unlink_lowervp()