qcow2: bdrv_co_pwritev: move encryption code out of the lock
Encryption will be done in threads, to take benefit of it, we should move it out of the lock first. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-id: 20190506142741.41731-8-vsementsov@virtuozzo.com Signed-off-by: Max Reitz <mreitz@redhat.com>
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@ -2168,11 +2168,20 @@ static coroutine_fn int qcow2_co_pwritev(BlockDriverState *bs, uint64_t offset,
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ret = qcow2_alloc_cluster_offset(bs, offset, &cur_bytes,
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&cluster_offset, &l2meta);
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if (ret < 0) {
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goto fail;
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goto out_locked;
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}
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assert((cluster_offset & 511) == 0);
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ret = qcow2_pre_write_overlap_check(bs, 0,
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cluster_offset + offset_in_cluster,
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cur_bytes, true);
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if (ret < 0) {
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goto out_locked;
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}
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qemu_co_mutex_unlock(&s->lock);
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qemu_iovec_reset(&hd_qiov);
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qemu_iovec_concat(&hd_qiov, qiov, bytes_done, cur_bytes);
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@ -2184,7 +2193,7 @@ static coroutine_fn int qcow2_co_pwritev(BlockDriverState *bs, uint64_t offset,
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* s->cluster_size);
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if (cluster_data == NULL) {
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ret = -ENOMEM;
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goto fail;
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goto out_unlocked;
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}
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}
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@ -2199,40 +2208,34 @@ static coroutine_fn int qcow2_co_pwritev(BlockDriverState *bs, uint64_t offset,
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cluster_data,
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cur_bytes, NULL) < 0) {
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ret = -EIO;
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goto fail;
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goto out_unlocked;
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}
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qemu_iovec_reset(&hd_qiov);
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qemu_iovec_add(&hd_qiov, cluster_data, cur_bytes);
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}
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ret = qcow2_pre_write_overlap_check(bs, 0,
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cluster_offset + offset_in_cluster, cur_bytes, true);
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if (ret < 0) {
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goto fail;
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}
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/* If we need to do COW, check if it's possible to merge the
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* writing of the guest data together with that of the COW regions.
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* If it's not possible (or not necessary) then write the
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* guest data now. */
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if (!merge_cow(offset, cur_bytes, &hd_qiov, l2meta)) {
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qemu_co_mutex_unlock(&s->lock);
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BLKDBG_EVENT(bs->file, BLKDBG_WRITE_AIO);
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trace_qcow2_writev_data(qemu_coroutine_self(),
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cluster_offset + offset_in_cluster);
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ret = bdrv_co_pwritev(s->data_file,
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cluster_offset + offset_in_cluster,
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cur_bytes, &hd_qiov, 0);
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qemu_co_mutex_lock(&s->lock);
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if (ret < 0) {
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goto fail;
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goto out_unlocked;
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}
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}
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qemu_co_mutex_lock(&s->lock);
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ret = qcow2_handle_l2meta(bs, &l2meta, true);
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if (ret) {
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goto fail;
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goto out_locked;
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}
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bytes -= cur_bytes;
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@ -2241,8 +2244,12 @@ static coroutine_fn int qcow2_co_pwritev(BlockDriverState *bs, uint64_t offset,
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trace_qcow2_writev_done_part(qemu_coroutine_self(), cur_bytes);
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}
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ret = 0;
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goto out_locked;
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fail:
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out_unlocked:
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qemu_co_mutex_lock(&s->lock);
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out_locked:
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qcow2_handle_l2meta(bs, &l2meta, false);
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qemu_co_mutex_unlock(&s->lock);
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