diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/qcow.c | 52 |
1 files changed, 29 insertions, 23 deletions
diff --git a/block/qcow.c b/block/qcow.c index 77c86e47ce..b22df46374 100644 --- a/block/qcow.c +++ b/block/qcow.c @@ -503,6 +503,32 @@ typedef struct QCowAIOCB { BlockDriverAIOCB *hd_aiocb; } QCowAIOCB; + +static QCowAIOCB *qcow_aio_setup(BlockDriverState *bs, + int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, + BlockDriverCompletionFunc *cb, void *opaque, int is_write) +{ + QCowAIOCB *acb; + + acb = qemu_aio_get(bs, cb, opaque); + if (!acb) + return NULL; + acb->hd_aiocb = NULL; + acb->sector_num = sector_num; + acb->qiov = qiov; + if (qiov->niov > 1) { + acb->buf = acb->orig_buf = qemu_blockalign(bs, qiov->size); + if (is_write) + qemu_iovec_to_buffer(qiov, acb->buf); + } else { + acb->buf = (uint8_t *)qiov->iov->iov_base; + } + acb->nb_sectors = nb_sectors; + acb->n = 0; + acb->cluster_offset = 0; + return acb; +} + static void qcow_aio_read_cb(void *opaque, int ret) { QCowAIOCB *acb = opaque; @@ -600,19 +626,9 @@ static BlockDriverAIOCB *qcow_aio_readv(BlockDriverState *bs, { QCowAIOCB *acb; - acb = qemu_aio_get(bs, cb, opaque); + acb = qcow_aio_setup(bs, sector_num, qiov, nb_sectors, cb, opaque, 0); if (!acb) return NULL; - acb->hd_aiocb = NULL; - acb->sector_num = sector_num; - acb->qiov = qiov; - if (qiov->niov > 1) - acb->buf = acb->orig_buf = qemu_blockalign(bs, qiov->size); - else - acb->buf = (uint8_t *)qiov->iov->iov_base; - acb->nb_sectors = nb_sectors; - acb->n = 0; - acb->cluster_offset = 0; qcow_aio_read_cb(acb, 0); return &acb->common; @@ -695,20 +711,10 @@ static BlockDriverAIOCB *qcow_aio_writev(BlockDriverState *bs, s->cluster_cache_offset = -1; /* disable compressed cache */ - acb = qemu_aio_get(bs, cb, opaque); + acb = qcow_aio_setup(bs, sector_num, qiov, nb_sectors, cb, opaque, 0); if (!acb) return NULL; - acb->hd_aiocb = NULL; - acb->sector_num = sector_num; - acb->qiov = qiov; - if (qiov->niov > 1) { - acb->buf = acb->orig_buf = qemu_blockalign(bs, qiov->size); - qemu_iovec_to_buffer(qiov, acb->buf); - } else { - acb->buf = (uint8_t *)qiov->iov->iov_base; - } - acb->nb_sectors = nb_sectors; - acb->n = 0; + qcow_aio_write_cb(acb, 0); return &acb->common; |