http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/linux/elevator.h

#ifndef _LINUX_ELEVATOR_H #define _LINUX_ELEVATOR_H typedef int (elevator_merge_fn) (request_queue_t *, struct request **, struct bio *); typedef void (elevator_merge_req_fn) (request_queue_t *, struct request *, struct request *); typedef void (elevator_merged_fn) (request_queue_t *, struct request *); typedef int (elevator_dispatch_fn) (request_queue_t *, int); typedef void (elevator_add_req_fn) (request_queue_t *, struct request *); typedef int (elevator_queue_empty_fn) (request_queue_t *); typedef struct request *(elevator_request_list_fn) (request_queue_t *, struct request *); typedef void (elevator_completed_req_fn) (request_queue_t *, struct request *); typedef int (elevator_may_queue_fn) (request_queue_t *, int, struct bio *); typedef int (elevator_set_req_fn) (request_queue_t *, struct request *, struct bio *, gfp_t); typedef void (elevator_put_req_fn) (request_queue_t *, struct request *); typedef void (elevator_activate_req_fn) (request_queue_t *, struct request *); typedef void (elevator_deactivate_req_fn) (request_queue_t *, struct request *); typedef int (elevator_init_fn) (request_queue_t *, elevator_t *); typedef void (elevator_exit_fn) (elevator_t *); struct elevator_ops { elevator_merge_fn *elevator_merge_fn; elevator_merged_fn *elevator_merged_fn; elevator_merge_req_fn *elevator_merge_req_fn; elevator_dispatch_fn *elevator_dispatch_fn; elevator_add_req_fn *elevator_add_req_fn; elevator_activate_req_fn *elevator_activate_req_fn; elevator_deactivate_req_fn *elevator_deactivate_req_fn; elevator_queue_empty_fn *elevator_queue_empty_fn; elevator_completed_req_fn *elevator_completed_req_fn; elevator_request_list_fn *elevator_former_req_fn; elevator_request_list_fn *elevator_latter_req_fn; elevator_set_req_fn *elevator_set_req_fn; elevator_put_req_fn *elevator_put_req_fn; elevator_may_queue_fn *elevator_may_queue_fn; elevator_init_fn *elevator_init_fn; elevator_exit_fn *elevator_exit_fn; }; #define ELV_NAME_MAX (16) /* * identifies an elevator type, such as AS or deadline */ struct elevator_type { struct list_head list; struct elevator_ops ops; struct elevator_type *elevator_type; struct kobj_type *elevator_ktype; char elevator_name[ELV_NAME_MAX]; struct module *elevator_owner; }; /* * each queue has an elevator_queue associated with it */ struct elevator_queue { struct elevator_ops *ops; void *elevator_data; struct kobject kobj; struct elevator_type *elevator_type; }; /* * block elevator interface */ extern void elv_dispatch_sort(request_queue_t *, struct request *); extern void elv_add_request(request_queue_t *, struct request *, int, int); extern void __elv_add_request(request_queue_t *, struct request *, int, int); extern void elv_insert(request_queue_t *, struct request *, int); extern int elv_merge(request_queue_t *, struct request **, struct bio *); extern void elv_merge_requests(request_queue_t *, struct request *, struct request *); extern void elv_merged_request(request_queue_t *, struct request *); extern void elv_dequeue_request(request_queue_t *, struct request *); extern void elv_requeue_request(request_queue_t *, struct request *); extern int elv_queue_empty(request_queue_t *); extern struct request *elv_next_request(struct request_queue *q); extern struct request *elv_former_request(request_queue_t *, struct request *); extern struct request *elv_latter_request(request_queue_t *, struct request *); extern int elv_register_queue(request_queue_t *q); extern void elv_unregister_queue(request_queue_t *q); extern int elv_may_queue(request_queue_t *, int, struct bio *); extern void elv_completed_request(request_queue_t *, struct request *); extern int elv_set_request(request_queue_t *, struct request *, struct bio *, gfp_t); extern void elv_put_request(request_queue_t *, struct request *); /* * io scheduler registration */ extern int elv_register(struct elevator_type *); extern void elv_unregister(struct elevator_type *); /* * io scheduler sysfs switching */ extern ssize_t elv_iosched_show(request_queue_t *, char *); extern ssize_t elv_iosched_store(request_queue_t *, const char *, size_t); extern int elevator_init(request_queue_t *, char *); extern void elevator_exit(elevator_t *); extern int elv_rq_merge_ok(struct request *, struct bio *); /* * Return values from elevator merger */ #define ELEVATOR_NO_MERGE 0 #define ELEVATOR_FRONT_MERGE 1 #define ELEVATOR_BACK_MERGE 2 /* * Insertion selection */ #define ELEVATOR_INSERT_FRONT 1 #define ELEVATOR_INSERT_BACK 2 #define ELEVATOR_INSERT_SORT 3 #define ELEVATOR_INSERT_REQUEUE 4 /* * return values from elevator_may_queue_fn */ enum { ELV_MQUEUE_MAY, ELV_MQUEUE_NO, ELV_MQUEUE_MUST, }; #define rq_end_sector(rq) ((rq)->sector + (rq)->nr_sectors) #endif