include/linux/elevator.h

31 	int (*init_sched)(struct request_queue *, struct elevator_type *);
37 	bool (*allow_merge)(struct request_queue *, struct request *, struct bio *);
38 	bool (*bio_merge)(struct request_queue *, struct bio *, unsigned int);
39 	int (*request_merge)(struct request_queue *q, struct request **, struct bio *);
40 	void (*request_merged)(struct request_queue *, struct request *, enum elv_merge);
41 	void (*requests_merged)(struct request_queue *, struct request *, struct request *);
50 	struct request *(*former_request)(struct request_queue *, struct request *);
51 	struct request *(*next_request)(struct request_queue *, struct request *);
102 void elv_rqhash_del(struct request_queue *q, struct request *rq);
103 void elv_rqhash_add(struct request_queue *q, struct request *rq);
104 void elv_rqhash_reposition(struct request_queue *q, struct request *rq);
105 struct request *elv_rqhash_find(struct request_queue *q, sector_t offset);
123 extern enum elv_merge elv_merge(struct request_queue *, struct request **,
125 extern void elv_merge_requests(struct request_queue *, struct request *,
127 extern void elv_merged_request(struct request_queue *, struct request *,
129 extern bool elv_attempt_insert_merge(struct request_queue *, struct request *);
130 extern struct request *elv_former_request(struct request_queue *, struct request *);
131 extern struct request *elv_latter_request(struct request_queue *, struct request *);
142 extern ssize_t elv_iosched_show(struct request_queue *, char *);
143 extern ssize_t elv_iosched_store(struct request_queue *, const char *, size_t);
146 extern struct elevator_queue *elevator_alloc(struct request_queue *,
152 extern struct request *elv_rb_former_request(struct request_queue *, struct request *);
153 extern struct request *elv_rb_latter_request(struct request_queue *, struct request *);