fsh, fsd, libfsd, fsdadm from Sep 3rd webrev

*** 63,72 ****
--- 63,73 ----
  #include <sys/nbmlock.h>
  #include <sys/fcntl.h>
  #include <fs/fs_subr.h>
  #include <sys/taskq.h>
  #include <fs/fs_reparse.h>
+ #include <sys/fsh_impl.h>
  
  /* Determine if this vnode is a file that is read-only */
  #define ISROFILE(vp)    \
          ((vp)->v_type != VCHR && (vp)->v_type != VBLK && \
              (vp)->v_type != VFIFO && vn_is_readonly(vp))
*** 3223,3233 ****
          int     err;
          ssize_t resid_start = uiop->uio_resid;
  
          VOPXID_MAP_CR(vp, cr);
  
!         err = (*(vp)->v_op->vop_read)(vp, uiop, ioflag, cr, ct);
          VOPSTATS_UPDATE_IO(vp, read,
              read_bytes, (resid_start - uiop->uio_resid));
          return (err);
  }
  
--- 3224,3234 ----
          int     err;
          ssize_t resid_start = uiop->uio_resid;
  
          VOPXID_MAP_CR(vp, cr);
  
!         err = fsh_read(vp, uiop, ioflag, cr, ct);
          VOPSTATS_UPDATE_IO(vp, read,
              read_bytes, (resid_start - uiop->uio_resid));
          return (err);
  }
  
*** 3242,3252 ****
          int     err;
          ssize_t resid_start = uiop->uio_resid;
  
          VOPXID_MAP_CR(vp, cr);
  
!         err = (*(vp)->v_op->vop_write)(vp, uiop, ioflag, cr, ct);
          VOPSTATS_UPDATE_IO(vp, write,
              write_bytes, (resid_start - uiop->uio_resid));
          return (err);
  }
  
--- 3243,3253 ----
          int     err;
          ssize_t resid_start = uiop->uio_resid;
  
          VOPXID_MAP_CR(vp, cr);
  
!         err = fsh_write(vp, uiop, ioflag, cr, ct);
          VOPSTATS_UPDATE_IO(vp, write,
              write_bytes, (resid_start - uiop->uio_resid));
          return (err);
  }