Laszlo Ersek
01dd96d8f4
On 08/05/13 15:03, Paolo Bonzini wrote:
>
> [...]
>
> 3) These members are special
>
> .format_name is the string "raw"
> .bdrv_open raw_open should set bs->sg to bs->file->sg and return 0
> .bdrv_close raw_close should do nothing
> .bdrv_probe raw_probe should just return 1.
v1->v2:
On 08/20/13 10:11, Kevin Wolf wrote:
> Am 16.08.2013 um 16:15 hat Laszlo Ersek geschrieben:
>> +static int raw_probe(void)
>> +{
>> + return 1;
>> +}
>
> Maybe add a comment here like "smallest possible positive score so that
> raw is used if and only if no other block driver works".
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
138 lines
3.1 KiB
C
138 lines
3.1 KiB
C
/* BlockDriver implementation for "raw"
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*
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* Copyright (C) 2013, Red Hat, Inc.
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*
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* Author:
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* Laszlo Ersek <lersek@redhat.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include "block/block_int.h"
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static TYPE raw_reopen_prepare(BlockDriverState *bs)
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{
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return bdrv_reopen_prepare(bs->file);
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}
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static TYPE raw_co_readv(BlockDriverState *bs)
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{
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BLKDBG_EVENT(bs->file, BLKDBG_READ_AIO);
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return bdrv_co_readv(bs->file);
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}
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static TYPE raw_co_writev(BlockDriverState *bs)
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{
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BLKDBG_EVENT(bs->file, BLKDBG_WRITE_AIO);
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return bdrv_co_writev(bs->file);
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}
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static TYPE raw_co_is_allocated(BlockDriverState *bs)
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{
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return bdrv_co_is_allocated(bs->file);
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}
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static TYPE raw_co_write_zeroes(BlockDriverState *bs)
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{
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return bdrv_co_write_zeroes(bs->file);
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}
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static TYPE raw_co_discard(BlockDriverState *bs)
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{
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return bdrv_co_discard(bs->file);
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}
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static TYPE raw_getlength(BlockDriverState *bs)
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{
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return bdrv_getlength(bs->file);
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}
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static TYPE raw_get_info(BlockDriverState *bs)
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{
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return bdrv_get_info(bs->file);
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}
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static TYPE raw_truncate(BlockDriverState *bs)
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{
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return bdrv_truncate(bs->file);
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}
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static TYPE raw_is_inserted(BlockDriverState *bs)
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{
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return bdrv_is_inserted(bs->file);
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}
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static TYPE raw_media_changed(BlockDriverState *bs)
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{
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return bdrv_media_changed(bs->file);
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}
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static TYPE raw_eject(BlockDriverState *bs)
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{
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return bdrv_eject(bs->file);
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}
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static TYPE raw_lock_medium(BlockDriverState *bs)
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{
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return bdrv_lock_medium(bs->file);
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}
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static TYPE raw_ioctl(BlockDriverState *bs)
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{
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return bdrv_ioctl(bs->file);
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}
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static TYPE raw_aio_ioctl(BlockDriverState *bs)
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{
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return bdrv_aio_ioctl(bs->file);
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}
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static TYPE raw_has_zero_init(BlockDriverState *bs)
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{
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return bdrv_has_zero_init(bs->file);
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}
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static TYPE raw_create(void)
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{
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return bdrv_create_file();
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}
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static const char *raw_format_name(void)
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{
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return "raw";
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}
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static int raw_open(BlockDriverState *bs)
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{
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bs->sg = bs->file->sg;
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return 0;
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}
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static void raw_close(void)
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{
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}
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static int raw_probe(void)
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{
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/* smallest possible positive score so that raw is used if and only if no
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* other block driver works
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*/
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return 1;
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}
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