int
fdesc_unmount(struct mount *mp, int mntflags)
{
int error;
int flags = 0;
struct vnode *rtvp = VFSTOFDESC(mp)->f_root;
if (mntflags & MNT_FORCE)
flags |= FORCECLOSE;
if (rtvp->v_usecount > 1 && (mntflags & MNT_FORCE) == 0)
return (EBUSY);
if ((error = vflush(mp, rtvp, flags)) != 0)
return (error);
/*
* Blow it away for future re-use
*/
vgone(rtvp);
/*
* Finally, throw away the fdescmount structure
*/
free(mp->mnt_data, M_UFSMNT); /* XXX */
mp->mnt_data = NULL;
return (0);
}
int
fdesc_root(struct mount *mp, struct vnode **vpp)
{
struct vnode *vp;
int error;
/*
* Return locked reference to root.
*/
vp = VFSTOFDESC(mp)->f_root;
error = vget(vp, LK_EXCLUSIVE | LK_RETRY);
if (error == 0)
*vpp = vp;
return (error);
}
