1 files changed, 109 insertions, 0 deletions
diff --git a/libc/kernel/common/linux/elevator.h b/libc/kernel/common/linux/elevator.h
new file mode 100644
index 0000000..2e79ce9
--- /dev/null
+++ b/libc/kernel/common/linux/elevator.h
@@ -0,0 +1,109 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#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 void *(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;
+ void (*trim)(struct io_context *);
+};
+
+#define ELV_NAME_MAX (16)
+
+struct elv_fs_entry {
+ struct attribute attr;
+ ssize_t (*show)(elevator_t *, char *);
+ ssize_t (*store)(elevator_t *, const char *, size_t);
+};
+
+struct elevator_type
+{
+ struct list_head list;
+ struct elevator_ops ops;
+ struct elevator_type *elevator_type;
+ struct elv_fs_entry *elevator_attrs;
+ char elevator_name[ELV_NAME_MAX];
+ struct module *elevator_owner;
+};
+
+struct elevator_queue
+{
+ struct elevator_ops *ops;
+ void *elevator_data;
+ struct kobject kobj;
+ struct elevator_type *elevator_type;
+ struct mutex sysfs_lock;
+};
+
+#define ELEVATOR_NO_MERGE 0
+#define ELEVATOR_FRONT_MERGE 1
+#define ELEVATOR_BACK_MERGE 2
+
+#define ELEVATOR_INSERT_FRONT 1
+#define ELEVATOR_INSERT_BACK 2
+#define ELEVATOR_INSERT_SORT 3
+#define ELEVATOR_INSERT_REQUEUE 4
+
+enum {
+ ELV_MQUEUE_MAY,
+ ELV_MQUEUE_NO,
+ ELV_MQUEUE_MUST,
+};
+
+#define rq_end_sector(rq) ((rq)->sector + (rq)->nr_sectors)
+
+#endif