blkdebug: Basic request passthrough

block-nested-y += cow.o qcow.o vdi.o vmdk.o cloop.o dmg.o bochs.o vpc.o vvfat.o

block-nested-y += qcow2.o qcow2-refcount.o qcow2-cluster.o qcow2-snapshot.o

block-nested-y += parallels.o nbd.o

block-nested-y += parallels.o nbd.o blkdebug.o

block-nested-$(CONFIG_WIN32) += raw-win32.o

block-nested-$(CONFIG_POSIX) += raw-posix.o

block-nested-$(CONFIG_CURL) += curl.o

/*

 * Block protocol for I/O error injection

 *

 * Copyright (c) 2010 Kevin Wolf <kwolf@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 "qemu-common.h"

#include "block_int.h"

#include "module.h"

typedef struct BDRVBlkdebugState {

    BlockDriverState *hd;

} BDRVBlkdebugState;

static int blkdebug_open(BlockDriverState *bs, const char *filename, int flags)

{

    BDRVBlkdebugState *s = bs->opaque;

    if (strncmp(filename, "blkdebug:", strlen("blkdebug:"))) {

        return -EINVAL;

    }

    filename += strlen("blkdebug:");

    return bdrv_file_open(&s->hd, filename, flags);

}

static BlockDriverAIOCB *blkdebug_aio_readv(BlockDriverState *bs,

    int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,

    BlockDriverCompletionFunc *cb, void *opaque)

{

    BDRVBlkdebugState *s = bs->opaque;

    BlockDriverAIOCB *acb =

        bdrv_aio_readv(s->hd, sector_num, qiov, nb_sectors, cb, opaque);

    return acb;

}

static BlockDriverAIOCB *blkdebug_aio_writev(BlockDriverState *bs,

    int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,

    BlockDriverCompletionFunc *cb, void *opaque)

{

    BDRVBlkdebugState *s = bs->opaque;

    BlockDriverAIOCB *acb =

        bdrv_aio_writev(s->hd, sector_num, qiov, nb_sectors, cb, opaque);

    return acb;

}

static void blkdebug_close(BlockDriverState *bs)

{

    BDRVBlkdebugState *s = bs->opaque;

    bdrv_delete(s->hd);

}

static void blkdebug_flush(BlockDriverState *bs)

{

    BDRVBlkdebugState *s = bs->opaque;

    bdrv_flush(s->hd);

}

static BlockDriverAIOCB *blkdebug_aio_flush(BlockDriverState *bs,

    BlockDriverCompletionFunc *cb, void *opaque)

{

    BDRVBlkdebugState *s = bs->opaque;

    return bdrv_aio_flush(s->hd, cb, opaque);

}

static BlockDriver bdrv_blkdebug = {

    .format_name        = "blkdebug",

    .protocol_name      = "blkdebug",

    .instance_size      = sizeof(BDRVBlkdebugState),

    .bdrv_open          = blkdebug_open,

    .bdrv_close         = blkdebug_close,

    .bdrv_flush         = blkdebug_flush,

    .bdrv_aio_readv     = blkdebug_aio_readv,

    .bdrv_aio_writev    = blkdebug_aio_writev,

    .bdrv_aio_flush     = blkdebug_aio_flush,

};

static void bdrv_blkdebug_init(void)

{

    bdrv_register(&bdrv_blkdebug);

}

block_init(bdrv_blkdebug_init);