2 # Copyright (c) 2010 Alexander Motin
5 # Redistribution and use in source and binary forms, with or without
6 # modification, are permitted provided that the following conditions
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.
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.
28 #include <sys/param.h>
30 #include <sys/malloc.h>
31 #include <sys/mutex.h>
34 #include <machine/bus.h>
35 #include <sys/systm.h>
36 #include <geom/geom.h>
37 #include <geom/raid/g_raid.h>
39 # The G_RAID transformation class interface.
43 # Default implementations of methods.
46 g_raid_tr_locked_default(struct g_raid_tr_object *tr, void *argp)
54 #define G_RAID_TR_TASTE_FAIL -1
55 #define G_RAID_TR_TASTE_SUCCEED 0
58 # taste() - volume taste method.
60 struct g_raid_tr_object *tr;
61 struct g_raid_volume *volume;
64 # event() - events handling method.
66 struct g_raid_tr_object *tr;
67 struct g_raid_subdisk *sd;
71 # start() - begin operation.
73 struct g_raid_tr_object *tr;
76 # stop() - stop operation.
78 struct g_raid_tr_object *tr;
81 # iorequest() - manage forward transformation and generates requests to disks.
83 struct g_raid_tr_object *tr;
87 # iodone() - manages backward transformation and reports completion status.
89 struct g_raid_tr_object *tr;
90 struct g_raid_subdisk *sd;
94 # kerneldump() - optimized for rebustness (simplified) kernel dumping routine.
95 METHOD int kerneldump {
96 struct g_raid_tr_object *tr;
101 } DEFAULT g_raid_tr_kerneldump_common;
103 # locked() - callback method for lock().
105 struct g_raid_tr_object *tr;
107 } DEFAULT g_raid_tr_locked_default;
109 # free() - destructor.
111 struct g_raid_tr_object *tr;
114 # idle() - callback when the volume is idle for a while and the TR wants
115 # to schedule some work for that idle period.
117 struct g_raid_tr_object *tr;