nfs_getcacheblk
rabp = nfs_getcacheblk(vp, raoffset, biosize, td);
bp = nfs_getcacheblk(vp, loffset, biosize, td);
bp = nfs_getcacheblk(vp, (off_t)0, biosize, td);
bp = nfs_getcacheblk(vp, loffset, NFS_DIRBLKSIZ, td);
bp = nfs_getcacheblk(vp, (off_t)i * NFS_DIRBLKSIZ,
rabp = nfs_getcacheblk(vp, loffset + NFS_DIRBLKSIZ,
bp = nfs_getcacheblk(vp, loffset, biosize, td);
static struct buf *nfs_getcacheblk(struct vnode *vp, off_t loffset,