105 lines
3.2 KiB
C
105 lines
3.2 KiB
C
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/*
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* Block protocol for I/O error injection
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*
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* Copyright (c) 2010 Kevin Wolf <kwolf@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 deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* 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
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* THE 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 FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu-common.h"
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#include "block_int.h"
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#include "module.h"
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typedef struct BDRVBlkdebugState {
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BlockDriverState *hd;
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} BDRVBlkdebugState;
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static int blkdebug_open(BlockDriverState *bs, const char *filename, int flags)
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{
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BDRVBlkdebugState *s = bs->opaque;
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if (strncmp(filename, "blkdebug:", strlen("blkdebug:"))) {
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return -EINVAL;
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}
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filename += strlen("blkdebug:");
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return bdrv_file_open(&s->hd, filename, flags);
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}
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static BlockDriverAIOCB *blkdebug_aio_readv(BlockDriverState *bs,
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int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
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BlockDriverCompletionFunc *cb, void *opaque)
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{
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BDRVBlkdebugState *s = bs->opaque;
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BlockDriverAIOCB *acb =
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bdrv_aio_readv(s->hd, sector_num, qiov, nb_sectors, cb, opaque);
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return acb;
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}
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static BlockDriverAIOCB *blkdebug_aio_writev(BlockDriverState *bs,
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int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
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BlockDriverCompletionFunc *cb, void *opaque)
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{
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BDRVBlkdebugState *s = bs->opaque;
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BlockDriverAIOCB *acb =
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bdrv_aio_writev(s->hd, sector_num, qiov, nb_sectors, cb, opaque);
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return acb;
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}
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static void blkdebug_close(BlockDriverState *bs)
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{
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BDRVBlkdebugState *s = bs->opaque;
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bdrv_delete(s->hd);
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}
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static void blkdebug_flush(BlockDriverState *bs)
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{
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BDRVBlkdebugState *s = bs->opaque;
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bdrv_flush(s->hd);
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}
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static BlockDriverAIOCB *blkdebug_aio_flush(BlockDriverState *bs,
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BlockDriverCompletionFunc *cb, void *opaque)
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{
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BDRVBlkdebugState *s = bs->opaque;
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return bdrv_aio_flush(s->hd, cb, opaque);
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}
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static BlockDriver bdrv_blkdebug = {
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.format_name = "blkdebug",
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.protocol_name = "blkdebug",
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.instance_size = sizeof(BDRVBlkdebugState),
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.bdrv_open = blkdebug_open,
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.bdrv_close = blkdebug_close,
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.bdrv_flush = blkdebug_flush,
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.bdrv_aio_readv = blkdebug_aio_readv,
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.bdrv_aio_writev = blkdebug_aio_writev,
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.bdrv_aio_flush = blkdebug_aio_flush,
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};
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static void bdrv_blkdebug_init(void)
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{
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bdrv_register(&bdrv_blkdebug);
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}
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block_init(bdrv_blkdebug_init);
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