FreeBSD/Linux Kernel Cross Reference
sys/geom/raid/g_raid_tr_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/10.4/sys/geom/raid/g_raid_tr_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 transformation class interface.
    
    INTERFACE g_raid_tr;
    
    # Default implementations of methods.
    CODE {
            static int
            g_raid_tr_locked_default(struct g_raid_tr_object *tr, void *argp)
            {
    
                    return (0);
            }
    };
    
    HEADER {
    #define G_RAID_TR_TASTE_FAIL            -1
    #define G_RAID_TR_TASTE_SUCCEED          0
    };
    
    # taste() - volume taste method.
    METHOD int taste {
            struct g_raid_tr_object *tr;
            struct g_raid_volume *volume;
    };
    
    # event() - events handling method.
    METHOD int event {
            struct g_raid_tr_object *tr;
            struct g_raid_subdisk *sd;
            u_int event;
    };
    
    # start() - begin operation.
    METHOD int start {
            struct g_raid_tr_object *tr;
    };
    
    # stop() - stop operation.
    METHOD int stop {
            struct g_raid_tr_object *tr;
    };
    
    # iorequest() - manage forward transformation and generates requests to disks.
    METHOD void iostart {
            struct g_raid_tr_object *tr;
            struct bio *bp;
    };
    
    # iodone() - manages backward transformation and reports completion status.
    METHOD void iodone {
            struct g_raid_tr_object *tr;
            struct g_raid_subdisk *sd;
            struct bio *bp;
    };
    
    # kerneldump() - optimized for rebustness (simplified) kernel dumping routine.
    METHOD int kerneldump {
            struct g_raid_tr_object *tr;
            void *virtual;
            vm_offset_t physical;
            off_t offset;
           size_t length;
   } DEFAULT g_raid_tr_kerneldump_common;
   
   # locked() - callback method for lock().
   METHOD int locked {
           struct g_raid_tr_object *tr;
           void *argp;
   } DEFAULT g_raid_tr_locked_default;
   
   # free() - destructor.
   METHOD int free {
           struct g_raid_tr_object *tr;
   };
   
   # idle() - callback when the volume is idle for a while and the TR wants
   # to schedule some work for that idle period.
   METHOD int idle {
           struct g_raid_tr_object *tr;
   };

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