208 				struct pending_req *pending_req);
470 static struct pending_req *alloc_req(struct xen_blkif_ring *ring)  in alloc_req()
472 	struct pending_req *req = NULL;  in alloc_req()
477 		req = list_entry(ring->pending_free.next, struct pending_req,  in alloc_req()
489 static void free_req(struct xen_blkif_ring *ring, struct pending_req *req)  in free_req()
722 	struct pending_req *pending_req = (struct pending_req *)(data->data);  in xen_blkbk_unmap_and_respond_callback()  local
723 	struct xen_blkif_ring *ring = pending_req->ring;  in xen_blkbk_unmap_and_respond_callback()
731 	make_response(ring, pending_req->id,  in xen_blkbk_unmap_and_respond_callback()
732 		      pending_req->operation, pending_req->status);  in xen_blkbk_unmap_and_respond_callback()
733 	free_req(ring, pending_req);  in xen_blkbk_unmap_and_respond_callback()
752 static void xen_blkbk_unmap_and_respond(struct pending_req *req)  in xen_blkbk_unmap_and_respond()
942 static int xen_blkbk_map_seg(struct pending_req *pending_req)  in xen_blkbk_map_seg()  argument
946 	rc = xen_blkbk_map(pending_req->ring, pending_req->segments,  in xen_blkbk_map_seg()
947 			   pending_req->nr_segs,  in xen_blkbk_map_seg()
948 	                   (pending_req->operation != BLKIF_OP_READ));  in xen_blkbk_map_seg()
954 				    struct pending_req *pending_req,  in xen_blkbk_parse_indirect()  argument
958 	struct grant_page **pages = pending_req->indirect_pages;  in xen_blkbk_parse_indirect()
959 	struct xen_blkif_ring *ring = pending_req->ring;  in xen_blkbk_parse_indirect()
963 	nseg = pending_req->nr_segs;  in xen_blkbk_parse_indirect()
985 		pending_req->segments[n]->gref = segments[i].gref;  in xen_blkbk_parse_indirect()
1051 			     struct pending_req *pending_req)  in dispatch_other_io()  argument
1053 	free_req(ring, pending_req);  in dispatch_other_io()
1076 static void __end_block_io_op(struct pending_req *pending_req,  in __end_block_io_op()  argument
1080 	if (pending_req->operation == BLKIF_OP_FLUSH_DISKCACHE &&  in __end_block_io_op()
1083 		xen_blkbk_flush_diskcache(XBT_NIL, pending_req->ring->blkif->be, 0);  in __end_block_io_op()
1084 		pending_req->status = BLKIF_RSP_EOPNOTSUPP;  in __end_block_io_op()
1085 	} else if (pending_req->operation == BLKIF_OP_WRITE_BARRIER &&  in __end_block_io_op()
1088 		xen_blkbk_barrier(XBT_NIL, pending_req->ring->blkif->be, 0);  in __end_block_io_op()
1089 		pending_req->status = BLKIF_RSP_EOPNOTSUPP;  in __end_block_io_op()
1093 		pending_req->status = BLKIF_RSP_ERROR;  in __end_block_io_op()
1101 	if (atomic_dec_and_test(&pending_req->pendcnt))  in __end_block_io_op()
1102 		xen_blkbk_unmap_and_respond(pending_req);  in __end_block_io_op()
1126 	struct pending_req *pending_req;  in __do_block_io_op()  local
1150 		pending_req = alloc_req(ring);  in __do_block_io_op()
1151 		if (NULL == pending_req) {  in __do_block_io_op()
1181 			if (dispatch_rw_block_io(ring, &req, pending_req))  in __do_block_io_op()
1185 			free_req(ring, pending_req);  in __do_block_io_op()
1190 			if (dispatch_other_io(ring, &req, pending_req))  in __do_block_io_op()
1224 				struct pending_req *pending_req)  in dispatch_rw_block_io()  argument
1227 	struct seg_buf *seg = pending_req->seg;  in dispatch_rw_block_io()
1230 	struct bio **biolist = pending_req->biolist;  in dispatch_rw_block_io()
1236 	struct grant_page **pages = pending_req->segments;  in dispatch_rw_block_io()
1289 	pending_req->ring      = ring;  in dispatch_rw_block_io()
1290 	pending_req->id        = req->u.rw.id;  in dispatch_rw_block_io()
1291 	pending_req->operation = req_operation;  in dispatch_rw_block_io()
1292 	pending_req->status    = BLKIF_RSP_OKAY;  in dispatch_rw_block_io()
1293 	pending_req->nr_segs   = nseg;  in dispatch_rw_block_io()
1312 		if (xen_blkbk_parse_indirect(req, pending_req, seg, &preq))  in dispatch_rw_block_io()
1342 		xen_blk_drain_io(pending_req->ring);  in dispatch_rw_block_io()
1350 	if (xen_blkbk_map_seg(pending_req))  in dispatch_rw_block_io()
1374 			bio->bi_private = pending_req;  in dispatch_rw_block_io()
1393 		bio->bi_private = pending_req;  in dispatch_rw_block_io()
1398 	atomic_set(&pending_req->pendcnt, nbio);  in dispatch_rw_block_io()
1415 	xen_blkbk_unmap(ring, pending_req->segments,  in dispatch_rw_block_io()
1416 	                pending_req->nr_segs);  in dispatch_rw_block_io()
1420 	free_req(ring, pending_req);  in dispatch_rw_block_io()
1427 	atomic_set(&pending_req->pendcnt, 1);  in dispatch_rw_block_io()
1428 	__end_block_io_op(pending_req, BLK_STS_RESOURCE);  in dispatch_rw_block_io()