The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/geom/raid/g_raid_md_if.m

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    1 #-
    2 # Copyright (c) 2010 Alexander Motin
    3 # All rights reserved.
    4 #
    5 # Redistribution and use in source and binary forms, with or without
    6 # modification, are permitted provided that the following conditions
    7 # are met:
    8 #
    9 # 1. Redistributions of source code must retain the above copyright
   10 #    notice, this list of conditions and the following disclaimer.
   11 # 2. Redistributions in binary form must reproduce the above copyright
   12 #    notice, this list of conditions and the following disclaimer in the
   13 #    documentation and/or other materials provided with the distribution.
   14 #
   15 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   16 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17 # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18 # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   19 # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   20 # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   21 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   22 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   23 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   24 # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   25 #
   26 # $FreeBSD$
   27 
   28 #include <sys/param.h>
   29 #include <sys/lock.h>
   30 #include <sys/malloc.h>
   31 #include <sys/mutex.h>
   32 #include <sys/sbuf.h>
   33 #include <sys/bus.h>
   34 #include <machine/bus.h>
   35 #include <sys/systm.h>
   36 #include <geom/geom.h>
   37 #include <geom/raid/g_raid.h>
   38 
   39 # The G_RAID metadata class interface.
   40 
   41 INTERFACE g_raid_md;
   42 
   43 HEADER {
   44 #define G_RAID_MD_TASTE_FAIL            -1
   45 #define G_RAID_MD_TASTE_EXISTING         0
   46 #define G_RAID_MD_TASTE_NEW              1
   47 };
   48 
   49 # Default implementations of methods.
   50 CODE {
   51         static int
   52         g_raid_md_create_default(struct g_raid_md_object *md,
   53             struct g_class *mp, struct g_geom **gp)
   54         {
   55 
   56                 return (G_RAID_MD_TASTE_FAIL);
   57         }
   58 
   59         static int
   60         g_raid_md_create_req_default(struct g_raid_md_object *md,
   61             struct g_class *mp, struct gctl_req *req, struct g_geom **gp)
   62         {
   63 
   64                 return (G_RAID_MD_CREATE(md, mp, gp));
   65         }
   66 
   67         static int
   68         g_raid_md_ctl_default(struct g_raid_md_object *md,
   69             struct gctl_req *req)
   70         {
   71 
   72                 return (-1);
   73         }
   74 
   75         static int
   76         g_raid_md_volume_event_default(struct g_raid_md_object *md,
   77             struct g_raid_volume *vol, u_int event)
   78         {
   79 
   80                 return (-1);
   81         }
   82 
   83         static int
   84         g_raid_md_free_disk_default(struct g_raid_md_object *md,
   85             struct g_raid_volume *vol)
   86         {
   87 
   88                 return (0);
   89         }
   90 
   91         static int
   92         g_raid_md_free_volume_default(struct g_raid_md_object *md,
   93             struct g_raid_volume *vol)
   94         {
   95 
   96                 return (0);
   97         }
   98 };
   99 
  100 # create() - create new node from scratch.
  101 METHOD int create {
  102         struct g_raid_md_object *md;
  103         struct g_class *mp;
  104         struct g_geom **gp;
  105 } DEFAULT g_raid_md_create_default;
  106 
  107 # create_req() - create new node from scratch, with request argument.
  108 METHOD int create_req {
  109         struct g_raid_md_object *md;
  110         struct g_class *mp;
  111         struct gctl_req *req;
  112         struct g_geom **gp;
  113 } DEFAULT g_raid_md_create_req_default;
  114 
  115 # taste() - taste disk and, if needed, create new node.
  116 METHOD int taste {
  117         struct g_raid_md_object *md;
  118         struct g_class *mp;
  119         struct g_consumer *cp;
  120         struct g_geom **gp;
  121 };
  122 
  123 # ctl() - user-level control commands handling method.
  124 METHOD int ctl {
  125         struct g_raid_md_object *md;
  126         struct gctl_req *req;
  127 } DEFAULT g_raid_md_ctl_default;
  128 
  129 # event() - events handling method.
  130 METHOD int event {
  131         struct g_raid_md_object *md;
  132         struct g_raid_disk *disk;
  133         u_int event;
  134 };
  135 
  136 # volume_event() - events handling method.
  137 METHOD int volume_event {
  138         struct g_raid_md_object *md;
  139         struct g_raid_volume *vol;
  140         u_int event;
  141 } DEFAULT g_raid_md_volume_event_default;
  142 
  143 # write() - metadata write method.
  144 METHOD int write {
  145         struct g_raid_md_object *md;
  146         struct g_raid_volume *vol;
  147         struct g_raid_subdisk *sd;
  148         struct g_raid_disk *disk;
  149 };
  150 
  151 # fail_disk() - mark disk as failed and remove it from use.
  152 METHOD int fail_disk {
  153         struct g_raid_md_object *md;
  154         struct g_raid_subdisk *sd;
  155         struct g_raid_disk *disk;
  156 };
  157 
  158 # free_disk() - disk destructor.
  159 METHOD int free_disk {
  160         struct g_raid_md_object *md;
  161         struct g_raid_disk *disk;
  162 } DEFAULT g_raid_md_free_disk_default;
  163 
  164 # free_volume() - volume destructor.
  165 METHOD int free_volume {
  166         struct g_raid_md_object *md;
  167         struct g_raid_volume *vol;
  168 } DEFAULT g_raid_md_free_volume_default;
  169 
  170 # free() - destructor.
  171 METHOD int free {
  172         struct g_raid_md_object *md;
  173 };

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