diff options
| -rw-r--r-- | Makefile.objs | 2 | ||||
| -rw-r--r-- | block/blkdebug.c | 104 |
2 files changed, 105 insertions, 1 deletions
diff --git a/Makefile.objs b/Makefile.objs index 2a87e2c7f0..ed7bbdae02 100644 --- a/Makefile.objs +++ b/Makefile.objs @@ -14,7 +14,7 @@ block-obj-$(CONFIG_LINUX_AIO) += linux-aio.o block-nested-y += cow.o qcow.o vdi.o vmdk.o cloop.o dmg.o bochs.o vpc.o vvfat.o block-nested-y += qcow2.o qcow2-refcount.o qcow2-cluster.o qcow2-snapshot.o -block-nested-y += parallels.o nbd.o +block-nested-y += parallels.o nbd.o blkdebug.o block-nested-$(CONFIG_WIN32) += raw-win32.o block-nested-$(CONFIG_POSIX) += raw-posix.o block-nested-$(CONFIG_CURL) += curl.o diff --git a/block/blkdebug.c b/block/blkdebug.c new file mode 100644 index 0000000000..2c7e0dd0b7 --- /dev/null +++ b/block/blkdebug.c @@ -0,0 +1,104 @@ +/* + * 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); |