+ return;
+}
+
+ufs_lock(vp)
+ struct vnode *vp;
+{
+ register struct inode *ip = VTOI(vp);
+
+ ILOCK(ip);
+ return (0);
+}
+
+ufs_unlock(vp)
+ struct vnode *vp;
+{
+ register struct inode *ip = VTOI(vp);
+
+ if (!(ip->i_flag & ILOCKED))
+ panic("ufs_unlock NOT LOCKED");
+ IUNLOCK(ip);
+ return (0);
+}
+
+/*
+ * Get access to bmap
+ */
+ufs_bmap(vp, bn, vpp, bnp)
+ struct vnode *vp;
+ daddr_t bn;
+ struct vnode **vpp;
+ daddr_t *bnp;
+{
+ struct inode *ip = VTOI(vp);
+
+ if (vpp != NULL)
+ *vpp = ip->i_devvp;
+ if (bnp == NULL)
+ return (0);
+ return (bmap(ip, bn, bnp, (daddr_t *)0, (int *)0));
+}
+
+/*
+ * Just call the device strategy routine
+ */
+int checkoverlap = 1;
+
+ufs_strategy(bp)
+ register struct buf *bp;
+{
+ register struct inode *ip = VTOI(bp->b_vp);
+ register struct buf *ep;
+ struct vnode *vp;
+ struct buf *ebp;
+ daddr_t start, last;
+ int error;
+
+ if (bp->b_vp->v_type == VBLK || bp->b_vp->v_type == VCHR)
+ panic("ufs_strategy: spec");
+ if (bp->b_blkno == bp->b_lblkno) {
+ if (error = bmap(ip, bp->b_lblkno, &bp->b_blkno))
+ return (error);
+ if ((long)bp->b_blkno == -1) {
+ clrbuf(bp);
+ biodone(bp);
+ }
+ }
+ if ((long)bp->b_blkno == -1)
+ return (0);
+ if (checkoverlap) {
+ ebp = &buf[nbuf];
+ start = bp->b_blkno;
+ last = start + btodb(bp->b_bcount) - 1;
+ for (ep = buf; ep < ebp; ep++) {
+ if (ep == bp || (ep->b_flags & B_INVAL) ||
+ ep->b_vp == (struct vnode *)0)
+ continue;
+ if (VOP_BMAP(ep->b_vp, (daddr_t)0, &vp, (daddr_t)0))
+ continue;
+ if (vp != ip->i_devvp)
+ continue;
+ /* look for overlap */
+ if (ep->b_bcount == 0 || ep->b_blkno > last ||
+ ep->b_blkno + btodb(ep->b_bcount) <= start)
+ continue;
+ panic("Disk overlap");
+ }
+ }
+ vp = ip->i_devvp;
+ bp->b_dev = vp->v_rdev;
+ (*(vp->v_op->vn_strategy))(bp);
+ return (0);
+}
+
+/*
+ * Print out the contents of an inode.
+ */
+ufs_print(vp)
+ struct vnode *vp;
+{
+ register struct inode *ip = VTOI(vp);
+
+ printf("tag VT_UFS, ino %d, on dev %d, %d%s\n", ip->i_number,
+ major(ip->i_dev), minor(ip->i_dev),
+ (ip->i_flag & ILOCKED) ? " (LOCKED)" : "");
+}
+
+/*
+ * Read wrapper for special devices.
+ */
+ufsspec_read(vp, uio, ioflag, cred)
+ struct vnode *vp;
+ struct uio *uio;
+ int ioflag;
+ struct ucred *cred;
+{
+
+ /*
+ * Set access flag.
+ */
+ VTOI(vp)->i_flag |= IACC;
+ return (spec_read(vp, uio, ioflag, cred));