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

     #-
     # Copyright (c) 2010 Alexander Motin
     # All rights reserved.
     #
     # Redistribution and use in source and binary forms, with or without
     # modification, are permitted provided that the following conditions
     # are met:
     #
     # 1. Redistributions of source code must retain the above copyright
    #    notice, this list of conditions and the following disclaimer.
    # 2. Redistributions in binary form must reproduce the above copyright
    #    notice, this list of conditions and the following disclaimer in the
    #    documentation and/or other materials provided with the distribution.
    #
    # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
    # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
    # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
    # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
    # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
    # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
    # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    #
    # $FreeBSD: releng/8.3/sys/geom/raid/g_raid_md_if.m 219974 2011-03-24 21:31:32Z mav $
    
    #include <sys/param.h>
    #include <sys/lock.h>
    #include <sys/malloc.h>
    #include <sys/mutex.h>
    #include <sys/sbuf.h>
    #include <sys/bus.h>
    #include <machine/bus.h>
    #include <sys/systm.h>
    #include <geom/geom.h>
    #include <geom/raid/g_raid.h>
    
    # The G_RAID metadata class interface.
    
    INTERFACE g_raid_md;
    
    HEADER {
    #define G_RAID_MD_TASTE_FAIL            -1
    #define G_RAID_MD_TASTE_EXISTING         0
    #define G_RAID_MD_TASTE_NEW              1
    };
    
    # Default implementations of methods.
    CODE {
            static int
            g_raid_md_create_default(struct g_raid_md_object *md)
            {
    
                    return (G_RAID_MD_TASTE_FAIL);
            }
    
            static int
            g_raid_md_ctl_default(struct g_raid_md_object *md,
                struct gctl_req *req)
            {
    
                    return (-1);
            }
    
            static int
            g_raid_md_volume_event_default(struct g_raid_md_object *md,
                struct g_raid_volume *vol, u_int event)
            {
    
                    return (-1);
            }
    
            static int
            g_raid_md_free_disk_default(struct g_raid_md_object *md,
                struct g_raid_volume *vol)
            {
    
                    return (0);
            }
    
            static int
            g_raid_md_free_volume_default(struct g_raid_md_object *md,
                struct g_raid_volume *vol)
            {
    
                    return (0);
            }
    };
    
    # create() - create new node from scratch.
    METHOD int create {
            struct g_raid_md_object *md;
            struct g_class *mp;
            struct g_geom **gp;
    } DEFAULT g_raid_md_create_default;
    
    # taste() - taste disk and, if needed, create new node.
    METHOD int taste {
           struct g_raid_md_object *md;
           struct g_class *mp;
           struct g_consumer *cp;
           struct g_geom **gp;
   };
   
   # ctl() - user-level control commands handling method.
   METHOD int ctl {
           struct g_raid_md_object *md;
           struct gctl_req *req;
   } DEFAULT g_raid_md_ctl_default;
   
   # event() - events handling method.
   METHOD int event {
           struct g_raid_md_object *md;
           struct g_raid_disk *disk;
           u_int event;
   };
   
   # volume_event() - events handling method.
   METHOD int volume_event {
           struct g_raid_md_object *md;
           struct g_raid_volume *vol;
           u_int event;
   } DEFAULT g_raid_md_volume_event_default;
   
   # write() - metadata write method.
   METHOD int write {
           struct g_raid_md_object *md;
           struct g_raid_volume *vol;
           struct g_raid_subdisk *sd;
           struct g_raid_disk *disk;
   };
   
   # fail_disk() - mark disk as failed and remove it from use.
   METHOD int fail_disk {
           struct g_raid_md_object *md;
           struct g_raid_subdisk *sd;
           struct g_raid_disk *disk;
   };
   
   # free_disk() - disk destructor.
   METHOD int free_disk {
           struct g_raid_md_object *md;
           struct g_raid_disk *disk;
   } DEFAULT g_raid_md_free_disk_default;
   
   # free_volume() - volume destructor.
   METHOD int free_volume {
           struct g_raid_md_object *md;
           struct g_raid_volume *vol;
   } DEFAULT g_raid_md_free_volume_default;
   
   # free() - destructor.
   METHOD int free {
           struct g_raid_md_object *md;
   };

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