/* BlockDriver implementation for "raw"
*
* Copyright (C) 2010, 2013, Red Hat, Inc.
* Copyright (C) 2010, Blue Swirl <blauwirbel@gmail.com>
* Copyright (C) 2009, Anthony Liguori <aliguori@us.ibm.com>
*
* Author:
* Laszlo Ersek <lersek@redhat.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include "block/block_int.h"
#include "qemu/option.h"
static QemuOptsList raw_create_opts = {
.name = "raw-create-opts",
.head = QTAILQ_HEAD_INITIALIZER(raw_create_opts.head),
.desc = {
{
.name = BLOCK_OPT_SIZE,
.type = QEMU_OPT_SIZE,
.help = "Virtual disk size"
},
{ /* end of list */ }
}
};
static int raw_reopen_prepare(BDRVReopenState *reopen_state,
BlockReopenQueue *queue, Error **errp)
{
return 0;
}
static int coroutine_fn raw_co_readv(BlockDriverState *bs, int64_t sector_num,
int nb_sectors, QEMUIOVector *qiov)
{
BLKDBG_EVENT(bs->file, BLKDBG_READ_AIO);
return bdrv_co_readv(bs->file, sector_num, nb_sectors, qiov);
}
static int coroutine_fn raw_co_writev(BlockDriverState *bs, int64_t sector_num,
int nb_sectors, QEMUIOVector *qiov)
{
BLKDBG_EVENT(bs->file, BLKDBG_WRITE_AIO);
return bdrv_co_writev(bs->file, sector_num, nb_sectors, qiov);
}
static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs,
int64_t sector_num,
int nb_sectors, int *pnum)
{
*pnum = nb_sectors;
return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID | BDRV_BLOCK_DATA |
(sector_num << BDRV_SECTOR_BITS);
}
static int coroutine_fn raw_co_write_zeroes(BlockDriverState *bs,
int64_t sector_num, int nb_sectors,
BdrvRequestFlags flags)
{
return bdrv_co_write_zeroes(bs->file, sector_num, nb_sectors, flags);
}
static int coroutine_fn raw_co_discard(BlockDriverState *bs,
int64_t sector_num, int nb_sectors)
{
return bdrv_co_discard(bs->file, sector_num, nb_sectors);
}
static int64_t raw_getlength(BlockDriverState *bs)
{
return bdrv_getlength(bs->file);
}
static int raw_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
{
return bdrv_get_info(bs->file, bdi);
}
static int raw_refresh_limits(BlockDriverState *bs)
{
bs->bl = bs->file->bl;
return 0;
}
static int raw_truncate(BlockDriverState *bs, int64_t offset)
{
return bdrv_truncate(bs->file, offset);
}
static int raw_is_inserted(BlockDriverState *bs)
{
return bdrv_is_inserted(bs->file);
}
static int raw_media_changed(BlockDriverState *bs)
{
return bdrv_media_changed(bs->file);
}
static void raw_eject(BlockDriverState *bs, bool eject_flag)
{
bdrv_eject(bs->file, eject_flag);
}
static void raw_lock_medium(BlockDriverState *bs, bool locked)
{
bdrv_lock_medium(bs->file, locked);
}
static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
{
return bdrv_ioctl(bs->file, req, buf);
}
static BlockDriverAIOCB *raw_aio_ioctl(BlockDriverState *bs,
unsigned long int req, void *buf,
BlockDriverCompletionFunc *cb,
void *opaque)
{
return bdrv_aio_ioctl(bs->file, req, buf, cb, opaque);
}
static int raw_has_zero_init(BlockDriverState *bs)
{
return bdrv_has_zero_init(bs->file);
}
static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
{
Error *local_err = NULL;
int ret;
ret = bdrv_create_file(filename, opts, &local_err);
if (local_err) {
error_propagate(errp, local_err);
}
return ret;
}
static int raw_open(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
{
bs->sg = bs->file->sg;
return 0;
}
static void raw_close(BlockDriverState *bs)
{
}
static int raw_probe(const uint8_t *buf, int buf_size, const char *filename)
{
/* smallest possible positive score so that raw is used if and only if no
* other block driver works
*/
return 1;
}
static BlockDriver bdrv_raw = {
.format_name = "raw",
.bdrv_probe = &raw_probe,
.bdrv_reopen_prepare = &raw_reopen_prepare,
.bdrv_open = &raw_open,
.bdrv_close = &raw_close,
.bdrv_create = &raw_create,
.bdrv_co_readv = &raw_co_readv,
.bdrv_co_writev = &raw_co_writev,
.bdrv_co_write_zeroes = &raw_co_write_zeroes,
.bdrv_co_discard = &raw_co_discard,
.bdrv_co_get_block_status = &raw_co_get_block_status,
.bdrv_truncate = &raw_truncate,
.bdrv_getlength = &raw_getlength,
.has_variable_length = true,
.bdrv_get_info = &raw_get_info,
.bdrv_refresh_limits = &raw_refresh_limits,
.bdrv_is_inserted = &raw_is_inserted,
.bdrv_media_changed = &raw_media_changed,
.bdrv_eject = &raw_eject,
.bdrv_lock_medium = &raw_lock_medium,
.bdrv_ioctl = &raw_ioctl,
.bdrv_aio_ioctl = &raw_aio_ioctl,
.create_opts = &raw_create_opts,
.bdrv_has_zero_init = &raw_has_zero_init
};
static void bdrv_raw_init(void)
{
bdrv_register(&bdrv_raw);
}
block_init(bdrv_raw_init);
