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| author | Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> | 2019-06-04 19:15:12 +0300 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2019-08-27 14:58:42 +0100 |
| commit | 00721a3529977004da50207ecb4769ef251d7ede (patch) | |
| tree | 03054f9cfdaf9a6abd43c402d54e00c87f3e8e37 | |
| parent | 1acc3466a2fbbeb988b91f2ac05bb9cde1fc8e9d (diff) | |
| download | qemu-00721a3529977004da50207ecb4769ef251d7ede.zip qemu-00721a3529977004da50207ecb4769ef251d7ede.tar.gz qemu-00721a3529977004da50207ecb4769ef251d7ede.tar.bz2 | |
block/qcow2: refactor qcow2_co_preadv to use buffer-based io
Use buffer based io in encrypted case.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20190604161514.262241-11-vsementsov@virtuozzo.com
Message-Id: <20190604161514.262241-11-vsementsov@virtuozzo.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
| -rw-r--r-- | block/qcow2.c | 28 |
1 files changed, 16 insertions, 12 deletions
diff --git a/block/qcow2.c b/block/qcow2.c index 7c5a485..b2b87d1 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -2059,19 +2059,15 @@ static coroutine_fn int qcow2_co_preadv(BlockDriverState *bs, uint64_t offset, } assert(cur_bytes <= QCOW_MAX_CRYPT_CLUSTERS * s->cluster_size); - qemu_iovec_reset(&hd_qiov); - qemu_iovec_add(&hd_qiov, cluster_data, cur_bytes); - } - BLKDBG_EVENT(bs->file, BLKDBG_READ_AIO); - ret = bdrv_co_preadv(s->data_file, - cluster_offset + offset_in_cluster, - cur_bytes, &hd_qiov, 0); - if (ret < 0) { - goto fail; - } - if (bs->encrypted) { - assert(s->crypto); + BLKDBG_EVENT(bs->file, BLKDBG_READ_AIO); + ret = bdrv_co_pread(s->data_file, + cluster_offset + offset_in_cluster, + cur_bytes, cluster_data, 0); + if (ret < 0) { + goto fail; + } + assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0); assert((cur_bytes & (BDRV_SECTOR_SIZE - 1)) == 0); if (qcow2_co_decrypt(bs, cluster_offset, offset, @@ -2080,6 +2076,14 @@ static coroutine_fn int qcow2_co_preadv(BlockDriverState *bs, uint64_t offset, goto fail; } qemu_iovec_from_buf(qiov, bytes_done, cluster_data, cur_bytes); + } else { + BLKDBG_EVENT(bs->file, BLKDBG_READ_AIO); + ret = bdrv_co_preadv(s->data_file, + cluster_offset + offset_in_cluster, + cur_bytes, &hd_qiov, 0); + if (ret < 0) { + goto fail; + } } break; |