Symbol: VTBLK_FLAG_READONLY
sys/dev/virtual/virtio/block/virtio_blk.c
258
sc->vtblk_flags |= VTBLK_FLAG_READONLY;
sys/dev/virtual/virtio/block/virtio_blk.c
475
if ((ap->a_oflags & FWRITE) && (sc->vtblk_flags & VTBLK_FLAG_READONLY))