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 transformation class interface.
40
41 INTERFACE g_raid_tr;
42
43 # Default implementations of methods.
44 CODE {
45 static int
46 g_raid_tr_locked_default(struct g_raid_tr_object *tr, void *argp)
47 {
48
49 return (0);
50 }
51 };
52
53 HEADER {
54 #define G_RAID_TR_TASTE_FAIL -1
55 #define G_RAID_TR_TASTE_SUCCEED 0
56 };
57
58 # taste() - volume taste method.
59 METHOD int taste {
60 struct g_raid_tr_object *tr;
61 struct g_raid_volume *volume;
62 };
63
64 # event() - events handling method.
65 METHOD int event {
66 struct g_raid_tr_object *tr;
67 struct g_raid_subdisk *sd;
68 u_int event;
69 };
70
71 # start() - begin operation.
72 METHOD int start {
73 struct g_raid_tr_object *tr;
74 };
75
76 # stop() - stop operation.
77 METHOD int stop {
78 struct g_raid_tr_object *tr;
79 };
80
81 # iorequest() - manage forward transformation and generates requests to disks.
82 METHOD void iostart {
83 struct g_raid_tr_object *tr;
84 struct bio *bp;
85 };
86
87 # iodone() - manages backward transformation and reports completion status.
88 METHOD void iodone {
89 struct g_raid_tr_object *tr;
90 struct g_raid_subdisk *sd;
91 struct bio *bp;
92 };
93
94 # kerneldump() - optimized for rebustness (simplified) kernel dumping routine.
95 METHOD int kerneldump {
96 struct g_raid_tr_object *tr;
97 void *virtual;
98 vm_offset_t physical;
99 off_t offset;
100 size_t length;
101 } DEFAULT g_raid_tr_kerneldump_common;
102
103 # locked() - callback method for lock().
104 METHOD int locked {
105 struct g_raid_tr_object *tr;
106 void *argp;
107 } DEFAULT g_raid_tr_locked_default;
108
109 # free() - destructor.
110 METHOD int free {
111 struct g_raid_tr_object *tr;
112 };
113
114 # idle() - callback when the volume is idle for a while and the TR wants
115 # to schedule some work for that idle period.
116 METHOD int idle {
117 struct g_raid_tr_object *tr;
118 };
Cache object: d0cfd685df571df6411953665a0b8d37
|