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Tue, 30 Apr 2019 15:43:30 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 18/27] block/qcow: use buffer-based io X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" From: Vladimir Sementsov-Ogievskiy Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Stefan Hajnoczi Reviewed-by: Stefano Garzarella Signed-off-by: Kevin Wolf --- block/qcow.c | 19 ++++++------------- 1 file changed, 6 insertions(+), 13 deletions(-) diff --git a/block/qcow.c b/block/qcow.c index 10d2cf14b3..1bb8fd05e2 100644 --- a/block/qcow.c +++ b/block/qcow.c @@ -631,7 +631,6 @@ static coroutine_fn int qcow_co_preadv(BlockDriverState= *bs, uint64_t offset, int offset_in_cluster; int ret =3D 0, n; uint64_t cluster_offset; - QEMUIOVector hd_qiov; uint8_t *buf; void *orig_buf; =20 @@ -663,11 +662,10 @@ static coroutine_fn int qcow_co_preadv(BlockDriverSta= te *bs, uint64_t offset, if (!cluster_offset) { if (bs->backing) { /* read from the base image */ - qemu_iovec_init_buf(&hd_qiov, buf, n); qemu_co_mutex_unlock(&s->lock); /* qcow2 emits this on bs->file instead of bs->backing */ BLKDBG_EVENT(bs->file, BLKDBG_READ_BACKING_AIO); - ret =3D bdrv_co_preadv(bs->backing, offset, n, &hd_qiov, 0= ); + ret =3D bdrv_co_pread(bs->backing, offset, n, buf, 0); qemu_co_mutex_lock(&s->lock); if (ret < 0) { break; @@ -688,11 +686,10 @@ static coroutine_fn int qcow_co_preadv(BlockDriverSta= te *bs, uint64_t offset, ret =3D -EIO; break; } - qemu_iovec_init_buf(&hd_qiov, buf, n); qemu_co_mutex_unlock(&s->lock); BLKDBG_EVENT(bs->file, BLKDBG_READ_AIO); - ret =3D bdrv_co_preadv(bs->file, cluster_offset + offset_in_cl= uster, - n, &hd_qiov, 0); + ret =3D bdrv_co_pread(bs->file, cluster_offset + offset_in_clu= ster, + n, buf, 0); qemu_co_mutex_lock(&s->lock); if (ret < 0) { break; @@ -731,7 +728,6 @@ static coroutine_fn int qcow_co_pwritev(BlockDriverStat= e *bs, uint64_t offset, int offset_in_cluster; uint64_t cluster_offset; int ret =3D 0, n; - QEMUIOVector hd_qiov; uint8_t *buf; void *orig_buf; =20 @@ -776,11 +772,10 @@ static coroutine_fn int qcow_co_pwritev(BlockDriverSt= ate *bs, uint64_t offset, } } =20 - qemu_iovec_init_buf(&hd_qiov, buf, n); qemu_co_mutex_unlock(&s->lock); BLKDBG_EVENT(bs->file, BLKDBG_WRITE_AIO); - ret =3D bdrv_co_pwritev(bs->file, cluster_offset + offset_in_clust= er, - n, &hd_qiov, 0); + ret =3D bdrv_co_pwrite(bs->file, cluster_offset + offset_in_cluste= r, + n, buf, 0); qemu_co_mutex_lock(&s->lock); if (ret < 0) { break; @@ -1056,7 +1051,6 @@ qcow_co_pwritev_compressed(BlockDriverState *bs, uint= 64_t offset, uint64_t bytes, QEMUIOVector *qiov) { BDRVQcowState *s =3D bs->opaque; - QEMUIOVector hd_qiov; z_stream strm; int ret, out_len; uint8_t *buf, *out_buf; @@ -1122,9 +1116,8 @@ qcow_co_pwritev_compressed(BlockDriverState *bs, uint= 64_t offset, } cluster_offset &=3D s->cluster_offset_mask; =20 - qemu_iovec_init_buf(&hd_qiov, out_buf, out_len); BLKDBG_EVENT(bs->file, BLKDBG_WRITE_COMPRESSED); - ret =3D bdrv_co_pwritev(bs->file, cluster_offset, out_len, &hd_qiov, 0= ); + ret =3D bdrv_co_pwrite(bs->file, cluster_offset, out_len, out_buf, 0); if (ret < 0) { goto fail; } --=20 2.20.1