1 /* BlockDriver implementation for "raw"
3 * Copyright (C) 2010, 2013, Red Hat, Inc.
4 * Copyright (C) 2010, Blue Swirl <blauwirbel@gmail.com>
5 * Copyright (C) 2009, Anthony Liguori <aliguori@us.ibm.com>
8 * Laszlo Ersek <lersek@redhat.com>
10 * Permission is hereby granted, free of charge, to any person obtaining a copy
11 * of this software and associated documentation files (the "Software"), to
12 * deal in the Software without restriction, including without limitation the
13 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
14 * sell copies of the Software, and to permit persons to whom the Software is
15 * furnished to do so, subject to the following conditions:
17 * The above copyright notice and this permission notice shall be included in
18 * all copies or substantial portions of the Software.
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
23 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
24 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
25 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
29 #include "block/block_int.h"
30 #include "qemu/option.h"
32 static const QEMUOptionParameter raw_create_options
[] = {
34 .name
= BLOCK_OPT_SIZE
,
36 .help
= "Virtual disk size"
41 static TYPE
raw_reopen_prepare(BlockDriverState
*bs
)
43 return bdrv_reopen_prepare(bs
->file
);
46 static TYPE
raw_co_readv(BlockDriverState
*bs
)
48 BLKDBG_EVENT(bs
->file
, BLKDBG_READ_AIO
);
49 return bdrv_co_readv(bs
->file
);
52 static TYPE
raw_co_writev(BlockDriverState
*bs
)
54 BLKDBG_EVENT(bs
->file
, BLKDBG_WRITE_AIO
);
55 return bdrv_co_writev(bs
->file
);
58 static TYPE
raw_co_is_allocated(BlockDriverState
*bs
)
60 return bdrv_co_is_allocated(bs
->file
);
63 static TYPE
raw_co_write_zeroes(BlockDriverState
*bs
)
65 return bdrv_co_write_zeroes(bs
->file
);
68 static TYPE
raw_co_discard(BlockDriverState
*bs
)
70 return bdrv_co_discard(bs
->file
);
73 static TYPE
raw_getlength(BlockDriverState
*bs
)
75 return bdrv_getlength(bs
->file
);
78 static TYPE
raw_get_info(BlockDriverState
*bs
)
80 return bdrv_get_info(bs
->file
);
83 static TYPE
raw_truncate(BlockDriverState
*bs
)
85 return bdrv_truncate(bs
->file
);
88 static TYPE
raw_is_inserted(BlockDriverState
*bs
)
90 return bdrv_is_inserted(bs
->file
);
93 static TYPE
raw_media_changed(BlockDriverState
*bs
)
95 return bdrv_media_changed(bs
->file
);
98 static TYPE
raw_eject(BlockDriverState
*bs
)
100 return bdrv_eject(bs
->file
);
103 static TYPE
raw_lock_medium(BlockDriverState
*bs
)
105 return bdrv_lock_medium(bs
->file
);
108 static TYPE
raw_ioctl(BlockDriverState
*bs
)
110 return bdrv_ioctl(bs
->file
);
113 static TYPE
raw_aio_ioctl(BlockDriverState
*bs
)
115 return bdrv_aio_ioctl(bs
->file
);
118 static TYPE
raw_has_zero_init(BlockDriverState
*bs
)
120 return bdrv_has_zero_init(bs
->file
);
123 static TYPE
raw_create(void)
125 return bdrv_create_file();
128 static int raw_open(BlockDriverState
*bs
)
130 bs
->sg
= bs
->file
->sg
;
134 static void raw_close(void)
138 static int raw_probe(void)
140 /* smallest possible positive score so that raw is used if and only if no
141 * other block driver works
146 static BlockDriver bdrv_raw
= {
147 .format_name
= "raw",
148 .bdrv_probe
= &raw_probe
,
149 .bdrv_reopen_prepare
= &raw_reopen_prepare
,
150 .bdrv_open
= &raw_open
,
151 .bdrv_close
= &raw_close
,
152 .bdrv_create
= &raw_create
,
153 .bdrv_co_readv
= &raw_co_readv
,
154 .bdrv_co_writev
= &raw_co_writev
,
155 .bdrv_co_write_zeroes
= &raw_co_write_zeroes
,
156 .bdrv_co_discard
= &raw_co_discard
,
157 .bdrv_co_is_allocated
= &raw_co_is_allocated
,
158 .bdrv_truncate
= &raw_truncate
,
159 .bdrv_getlength
= &raw_getlength
,
160 .bdrv_get_info
= &raw_get_info
,
161 .bdrv_is_inserted
= &raw_is_inserted
,
162 .bdrv_media_changed
= &raw_media_changed
,
163 .bdrv_eject
= &raw_eject
,
164 .bdrv_lock_medium
= &raw_lock_medium
,
165 .bdrv_ioctl
= &raw_ioctl
,
166 .bdrv_aio_ioctl
= &raw_aio_ioctl
,
167 .create_options
= &raw_create_options
[0],
168 .bdrv_has_zero_init
= &raw_has_zero_init
171 static void bdrv_raw_init(void)
173 bdrv_register(&bdrv_raw
);
176 block_init(bdrv_raw_init
);