osd_req_op_extent_osd_data_bvecs
osd_req_op_extent_osd_data_bvecs(req, 0, bvecs, num_pages, len);
void osd_req_op_extent_osd_data_bvecs(struct ceph_osd_request *osd_req,
EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvecs);