sys/kern/kern_dsched.c

   1 /*
   2  * Copyright (c) 2009, 2010, 2015 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Alex Hornung <ahornung@gmail.com>
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  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
  16  *    distribution.
  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.
  20  *
  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
  32  * SUCH DAMAGE.
  33  */
  34 #include <sys/param.h>
  35 #include <sys/systm.h>
  36 #include <sys/kernel.h>
  37 #include <sys/proc.h>
  38 #include <sys/sysctl.h>
  39 #include <sys/buf.h>
  40 #include <sys/conf.h>
  41 #include <sys/diskslice.h>
  42 #include <sys/disk.h>
  43 #include <sys/malloc.h>
  44 #include <machine/md_var.h>
  45 #include <sys/ctype.h>
  46 #include <sys/syslog.h>
  47 #include <sys/device.h>
  48 #include <sys/msgport.h>
  49 #include <sys/msgport2.h>
  50 #include <sys/buf2.h>
  51 #include <sys/dsched.h>
  52 #include <sys/fcntl.h>
  53
  54 /*
  55  * Called on disk_create()
  56  * tries to read which policy to use from loader.conf, if there's
  57  * none specified, the default policy is used.
  58  */
  59 void
  60 dsched_disk_create(struct disk *dp, const char *head_name, int unit)
  61 {
  62 }
  63
  64 /*
  65  * Called from disk_setdiskinfo (or rather _setdiskinfo). This will check if
  66  * there's any policy associated with the serial number of the device.
  67  */
  68 void
  69 dsched_disk_update(struct disk *dp, struct disk_info *info)
  70 {
  71 }
  72
  73 /*
  74  * Called on disk_destroy()
  75  * shuts down the scheduler core and cancels all remaining bios
  76  */
  77 void
  78 dsched_disk_destroy(struct disk *dp)
  79 {
  80 }