d8b7e0adf5
The raw format delegates all operations to bs->file (the protocol). Previously this block driver exposed both sync and aio interfaces. Since the block layer now works in terms of coroutines, expose the coroutine interfaces and drop the others. This avoids unnecessary emulation of sync and aio interfaces. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
147 lines
3.5 KiB
C
147 lines
3.5 KiB
C
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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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static int raw_open(BlockDriverState *bs, int flags)
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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 int coroutine_fn raw_co_readv(BlockDriverState *bs, int64_t sector_num,
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int nb_sectors, QEMUIOVector *qiov)
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{
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return bdrv_co_readv(bs->file, sector_num, nb_sectors, qiov);
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}
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static int coroutine_fn raw_co_writev(BlockDriverState *bs, int64_t sector_num,
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int nb_sectors, QEMUIOVector *qiov)
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{
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return bdrv_co_writev(bs->file, sector_num, nb_sectors, qiov);
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}
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static void raw_close(BlockDriverState *bs)
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{
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}
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static int raw_flush(BlockDriverState *bs)
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{
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return bdrv_flush(bs->file);
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}
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static BlockDriverAIOCB *raw_aio_flush(BlockDriverState *bs,
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BlockDriverCompletionFunc *cb, void *opaque)
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{
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return bdrv_aio_flush(bs->file, cb, opaque);
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}
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static int64_t 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 int raw_truncate(BlockDriverState *bs, int64_t offset)
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{
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return bdrv_truncate(bs->file, offset);
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}
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static int raw_probe(const uint8_t *buf, int buf_size, const char *filename)
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{
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return 1; /* everything can be opened as raw image */
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}
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static int raw_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors)
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{
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return bdrv_discard(bs->file, sector_num, nb_sectors);
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}
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static int 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 int 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 void raw_eject(BlockDriverState *bs, int eject_flag)
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{
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bdrv_eject(bs->file, eject_flag);
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}
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static void raw_lock_medium(BlockDriverState *bs, bool locked)
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{
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bdrv_lock_medium(bs->file, locked);
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}
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static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
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{
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return bdrv_ioctl(bs->file, req, buf);
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}
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static BlockDriverAIOCB *raw_aio_ioctl(BlockDriverState *bs,
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unsigned long int req, void *buf,
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BlockDriverCompletionFunc *cb, void *opaque)
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{
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return bdrv_aio_ioctl(bs->file, req, buf, cb, opaque);
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}
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static int raw_create(const char *filename, QEMUOptionParameter *options)
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{
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return bdrv_create_file(filename, options);
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}
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static QEMUOptionParameter raw_create_options[] = {
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{
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.name = BLOCK_OPT_SIZE,
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.type = OPT_SIZE,
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.help = "Virtual disk size"
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},
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{ NULL }
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};
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static int 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 BlockDriver bdrv_raw = {
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.format_name = "raw",
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/* It's really 0, but we need to make g_malloc() happy */
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.instance_size = 1,
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.bdrv_open = raw_open,
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.bdrv_close = raw_close,
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.bdrv_co_readv = raw_co_readv,
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.bdrv_co_writev = raw_co_writev,
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.bdrv_flush = raw_flush,
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.bdrv_probe = raw_probe,
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.bdrv_getlength = raw_getlength,
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.bdrv_truncate = raw_truncate,
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.bdrv_aio_flush = raw_aio_flush,
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.bdrv_discard = raw_discard,
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.bdrv_is_inserted = raw_is_inserted,
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.bdrv_media_changed = raw_media_changed,
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.bdrv_eject = raw_eject,
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.bdrv_lock_medium = raw_lock_medium,
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.bdrv_ioctl = raw_ioctl,
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.bdrv_aio_ioctl = raw_aio_ioctl,
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.bdrv_create = raw_create,
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.create_options = raw_create_options,
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.bdrv_has_zero_init = raw_has_zero_init,
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};
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static void bdrv_raw_init(void)
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{
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bdrv_register(&bdrv_raw);
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}
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block_init(bdrv_raw_init);
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