22 static void defer_req(struct pcache_request *pcache_req)  in defer_req()  argument
24 	struct dm_pcache *pcache = pcache_req->pcache;  in defer_req()
26 	BUG_ON(!list_empty(&pcache_req->list_node));  in defer_req()
29 	list_add(&pcache_req->list_node, &pcache->defered_req_list);  in defer_req()
37 	struct pcache_request *pcache_req;  in defered_req_fn()  local
49 		pcache_req = list_first_entry(&tmp_list,  in defered_req_fn()
51 		list_del_init(&pcache_req->list_node);  in defered_req_fn()
52 		pcache_req->ret = 0;  in defered_req_fn()
53 		ret = pcache_cache_handle_req(&pcache->cache, pcache_req);  in defered_req_fn()
55 			defer_req(pcache_req);  in defered_req_fn()
57 			pcache_req_put(pcache_req, ret);  in defered_req_fn()
61 void pcache_req_get(struct pcache_request *pcache_req)  in pcache_req_get()  argument
63 	kref_get(&pcache_req->ref);  in pcache_req_get()
68 	struct pcache_request *pcache_req = container_of(ref, struct pcache_request, ref);  in end_req()  local
69 	struct dm_pcache *pcache = pcache_req->pcache;  in end_req()
70 	struct bio *bio = pcache_req->bio;  in end_req()
71 	int ret = pcache_req->ret;  in end_req()
74 		pcache_req_get(pcache_req);  in end_req()
75 		defer_req(pcache_req);  in end_req()
85 void pcache_req_put(struct pcache_request *pcache_req, int ret)  in pcache_req_put()  argument
88 	if (ret && !pcache_req->ret)  in pcache_req_put()
89 		pcache_req->ret = ret;  in pcache_req_put()
91 	kref_put(&pcache_req->ref, end_req);  in pcache_req_put()
329 	struct pcache_request *pcache_req;  in defer_req_stop()  local
339 		pcache_req = list_first_entry(&tmp_list,  in defer_req_stop()
341 		list_del_init(&pcache_req->list_node);  in defer_req_stop()
342 		pcache_req_put(pcache_req, -EIO);  in defer_req_stop()
370 	struct pcache_request *pcache_req = dm_per_bio_data(bio, sizeof(struct pcache_request));  in dm_pcache_map_bio()  local
374 	pcache_req->pcache = pcache;  in dm_pcache_map_bio()
375 	kref_init(&pcache_req->ref);  in dm_pcache_map_bio()
376 	pcache_req->ret = 0;  in dm_pcache_map_bio()
377 	pcache_req->bio = bio;  in dm_pcache_map_bio()
378 	pcache_req->off = (u64)bio->bi_iter.bi_sector << SECTOR_SHIFT;  in dm_pcache_map_bio()
379 	pcache_req->data_len = bio->bi_iter.bi_size;  in dm_pcache_map_bio()
380 	INIT_LIST_HEAD(&pcache_req->list_node);  in dm_pcache_map_bio()
383 	ret = pcache_cache_handle_req(&pcache->cache, pcache_req);  in dm_pcache_map_bio()
385 		defer_req(pcache_req);  in dm_pcache_map_bio()
387 		pcache_req_put(pcache_req, ret);  in dm_pcache_map_bio()