2 * Copyright (c) 2009 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Alex Hornung <ahornung@gmail.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #ifndef _SYS_DSCHED_H_
35 #define _SYS_DSCHED_H_
37 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
40 #include <sys/queue.h>
45 #ifndef _SYS_BIOTRACK_H_
46 #include <sys/biotrack.h>
54 #ifndef _SYS_MSGPORT_H_
55 #include <sys/msgport.h>
58 #define DSCHED_POLICY_NAME_LENGTH 64
60 #define dsched_set_disk_priv(dp, x) ((dp)->d_dsched_priv1 = (x))
61 #define dsched_get_disk_priv(dp) ((dp)?((dp)->d_dsched_priv1):NULL)
62 #define dsched_set_proc_priv(pp, x) ((pp)->p_dsched_priv1 = (x))
63 #define dsched_get_proc_priv(pp) ((pp)?((pp)->p_dsched_priv1):NULL)
65 #define dsched_set_thread_priv(td, x) ((td)->td_dsched_priv1 = (x))
66 #define dsched_get_thread_priv(td) ((td)?((td)->td_dsched_priv1):NULL)
68 #define dsched_set_buf_priv(bp, x) ((bp)->b_iosched = (x))
69 #define dsched_get_buf_priv(bp) ((bp)?((bp)->b_iosched):NULL)
70 #define dsched_clr_buf_priv(bp) ((bp)->b_iosched = NULL)
71 #define dsched_is_clear_buf_priv(bp) ((bp)->b_iosched == NULL)
74 #define dsched_set_bio_dp(bio, x) ((bio)->bio_caller_info1.ptr = (x))
75 #define dsched_get_bio_dp(bio) ((bio)?((bio)->bio_caller_info1.ptr):NULL)
76 #define dsched_set_bio_priv(bio, x) ((bio)->bio_caller_info2.ptr = (x))
77 #define dsched_get_bio_priv(bio) ((bio)?((bio)->bio_caller_info2.ptr):NULL)
78 #define dsched_set_bio_stime(bio, x) ((bio)->bio_caller_info3.lvalue = (x))
79 #define dsched_get_bio_stime(bio) ((bio)?((bio)->bio_caller_info3.lvalue):0)
82 typedef int dsched_prepare_t(struct disk *dp);
83 typedef void dsched_teardown_t(struct disk *dp);
84 typedef void dsched_flush_t(struct disk *dp, struct bio *bio);
85 typedef void dsched_cancel_t(struct disk *dp);
86 typedef int dsched_queue_t(struct disk *dp, struct bio *bio);
87 typedef void dsched_new_buf_t(struct buf *bp);
88 typedef void dsched_new_proc_t(struct proc *p);
89 typedef void dsched_new_thread_t(struct thread *td);
90 typedef void dsched_exit_buf_t(struct buf *bp);
91 typedef void dsched_exit_proc_t(struct proc *p);
92 typedef void dsched_exit_thread_t(struct thread *td);
95 struct dsched_policy {
96 char name[DSCHED_POLICY_NAME_LENGTH];
100 TAILQ_ENTRY(dsched_policy) link;
102 dsched_prepare_t *prepare;
103 dsched_teardown_t *teardown;
104 dsched_flush_t *flush;
105 dsched_cancel_t *cancel_all;
106 dsched_queue_t *bio_queue;
108 dsched_new_buf_t *new_buf;
109 dsched_new_proc_t *new_proc;
110 dsched_new_thread_t *new_thread;
111 dsched_exit_buf_t *exit_buf;
112 dsched_exit_proc_t *exit_proc;
113 dsched_exit_thread_t *exit_thread;
116 TAILQ_HEAD(dsched_policy_head, dsched_policy);
118 void dsched_disk_create_callback(struct disk *dp, const char *head_name, int unit);
119 void dsched_disk_destroy_callback(struct disk *dp);
120 void dsched_queue(struct disk *dp, struct bio *bio);
121 int dsched_register(struct dsched_policy *d_policy);
122 int dsched_unregister(struct dsched_policy *d_policy);
123 int dsched_switch(struct disk *dp, struct dsched_policy *new_policy);
124 void dsched_set_policy(struct disk *dp, struct dsched_policy *new_policy);
125 struct dsched_policy *dsched_find_policy(char *search);
126 struct disk *dsched_find_disk(char *search);
127 struct dsched_policy *dsched_policy_enumerate(struct dsched_policy *pol);
128 struct disk *dsched_disk_enumerate(struct disk *dp, struct dsched_policy *policy);
129 void dsched_cancel_bio(struct bio *bp);
130 void dsched_strategy_raw(struct disk *dp, struct bio *bp);
131 void dsched_strategy_sync(struct disk *dp, struct bio *bp);
132 void dsched_strategy_async(struct disk *dp, struct bio *bp, biodone_t *done, void *priv);
133 int dsched_debug(int level, char *fmt, ...) __printflike(2, 3);
134 dsched_new_buf_t dsched_new_buf;
135 dsched_new_proc_t dsched_new_proc;
136 dsched_new_thread_t dsched_new_thread;
137 dsched_exit_buf_t dsched_exit_buf;
138 dsched_exit_proc_t dsched_exit_proc;
139 dsched_exit_thread_t dsched_exit_thread;
141 #endif /* _KERNEL || _KERNEL_STRUCTURES */
144 #define DSCHED_NAME_LENGTH 64
145 #define DSCHED_SET_DEVICE_POLICY _IOWR('d', 1, struct dsched_ioctl)
146 #define DSCHED_LIST_DISKS _IOWR('d', 2, struct dsched_ioctl)
147 #define DSCHED_LIST_DISK _IOWR('d', 3, struct dsched_ioctl)
148 #define DSCHED_LIST_POLICIES _IOWR('d', 4, struct dsched_ioctl)
150 struct dsched_ioctl {
152 char dev_name[DSCHED_NAME_LENGTH];
153 char pol_name[DSCHED_NAME_LENGTH];
156 #endif /* _SYS_DSCHED_H_ */