diff options
Diffstat (limited to 'block.c')
| -rw-r--r-- | block.c | 61 |
1 files changed, 7 insertions, 54 deletions
@@ -61,12 +61,6 @@ static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, uint8_t *buf, int nb_sectors); static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, const uint8_t *buf, int nb_sectors); -static BlockDriverAIOCB *bdrv_co_aio_readv_em(BlockDriverState *bs, - int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, - BlockDriverCompletionFunc *cb, void *opaque); -static BlockDriverAIOCB *bdrv_co_aio_writev_em(BlockDriverState *bs, - int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, - BlockDriverCompletionFunc *cb, void *opaque); static int coroutine_fn bdrv_co_readv_em(BlockDriverState *bs, int64_t sector_num, int nb_sectors, QEMUIOVector *iov); @@ -84,8 +78,7 @@ static BlockDriverAIOCB *bdrv_co_aio_rw_vector(BlockDriverState *bs, int nb_sectors, BlockDriverCompletionFunc *cb, void *opaque, - bool is_write, - CoroutineEntry *entry); + bool is_write); static void coroutine_fn bdrv_co_do_rw(void *opaque); static QTAILQ_HEAD(, BlockDriverState) bdrv_states = @@ -199,13 +192,8 @@ void path_combine(char *dest, int dest_size, void bdrv_register(BlockDriver *bdrv) { - if (bdrv->bdrv_co_readv) { - /* Emulate AIO by coroutines, and sync by AIO */ - bdrv->bdrv_aio_readv = bdrv_co_aio_readv_em; - bdrv->bdrv_aio_writev = bdrv_co_aio_writev_em; - bdrv->bdrv_read = bdrv_read_em; - bdrv->bdrv_write = bdrv_write_em; - } else { + /* Block drivers without coroutine functions need emulation */ + if (!bdrv->bdrv_co_readv) { bdrv->bdrv_co_readv = bdrv_co_readv_em; bdrv->bdrv_co_writev = bdrv_co_writev_em; @@ -2382,7 +2370,7 @@ BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, trace_bdrv_aio_readv(bs, sector_num, nb_sectors, opaque); return bdrv_co_aio_rw_vector(bs, sector_num, qiov, nb_sectors, - cb, opaque, false, bdrv_co_do_rw); + cb, opaque, false); } BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, @@ -2392,7 +2380,7 @@ BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, trace_bdrv_aio_writev(bs, sector_num, nb_sectors, opaque); return bdrv_co_aio_rw_vector(bs, sector_num, qiov, nb_sectors, - cb, opaque, true, bdrv_co_do_rw); + cb, opaque, true); } @@ -2767,24 +2755,6 @@ static void bdrv_co_rw_bh(void *opaque) qemu_aio_release(acb); } -/* Invoke .bdrv_co_readv/.bdrv_co_writev */ -static void coroutine_fn bdrv_co_rw(void *opaque) -{ - BlockDriverAIOCBCoroutine *acb = opaque; - BlockDriverState *bs = acb->common.bs; - - if (!acb->is_write) { - acb->req.error = bs->drv->bdrv_co_readv(bs, acb->req.sector, - acb->req.nb_sectors, acb->req.qiov); - } else { - acb->req.error = bs->drv->bdrv_co_writev(bs, acb->req.sector, - acb->req.nb_sectors, acb->req.qiov); - } - - acb->bh = qemu_bh_new(bdrv_co_rw_bh, acb); - qemu_bh_schedule(acb->bh); -} - /* Invoke bdrv_co_do_readv/bdrv_co_do_writev */ static void coroutine_fn bdrv_co_do_rw(void *opaque) { @@ -2809,8 +2779,7 @@ static BlockDriverAIOCB *bdrv_co_aio_rw_vector(BlockDriverState *bs, int nb_sectors, BlockDriverCompletionFunc *cb, void *opaque, - bool is_write, - CoroutineEntry *entry) + bool is_write) { Coroutine *co; BlockDriverAIOCBCoroutine *acb; @@ -2821,28 +2790,12 @@ static BlockDriverAIOCB *bdrv_co_aio_rw_vector(BlockDriverState *bs, acb->req.qiov = qiov; acb->is_write = is_write; - co = qemu_coroutine_create(entry); + co = qemu_coroutine_create(bdrv_co_do_rw); qemu_coroutine_enter(co, acb); return &acb->common; } -static BlockDriverAIOCB *bdrv_co_aio_readv_em(BlockDriverState *bs, - int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, - BlockDriverCompletionFunc *cb, void *opaque) -{ - return bdrv_co_aio_rw_vector(bs, sector_num, qiov, nb_sectors, cb, opaque, - false, bdrv_co_rw); -} - -static BlockDriverAIOCB *bdrv_co_aio_writev_em(BlockDriverState *bs, - int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, - BlockDriverCompletionFunc *cb, void *opaque) -{ - return bdrv_co_aio_rw_vector(bs, sector_num, qiov, nb_sectors, cb, opaque, - true, bdrv_co_rw); -} - static BlockDriverAIOCB *bdrv_aio_flush_em(BlockDriverState *bs, BlockDriverCompletionFunc *cb, void *opaque) { |