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author | Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> | 2019-05-06 17:27:40 +0300 |
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committer | Max Reitz <mreitz@redhat.com> | 2019-05-28 20:30:55 +0200 |
commit | 5447c3a03f6775a99da6e36cc7eda09f293d7521 (patch) | |
tree | a2b7701cd2a626330b7a834d6356d41960088482 /block | |
parent | f24196d388ec781ce3ae99c1fb78ba9755785f91 (diff) | |
download | qemu-5447c3a03f6775a99da6e36cc7eda09f293d7521.zip qemu-5447c3a03f6775a99da6e36cc7eda09f293d7521.tar.gz qemu-5447c3a03f6775a99da6e36cc7eda09f293d7521.tar.bz2 |
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>
Diffstat (limited to 'block')
-rw-r--r-- | block/qcow2.c | 35 |
1 files changed, 21 insertions, 14 deletions
diff --git a/block/qcow2.c b/block/qcow2.c index 4a89850..4b4a0ce 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -2168,11 +2168,20 @@ static coroutine_fn int qcow2_co_pwritev(BlockDriverState *bs, uint64_t offset, ret = qcow2_alloc_cluster_offset(bs, offset, &cur_bytes, &cluster_offset, &l2meta); if (ret < 0) { - goto fail; + goto out_locked; } assert((cluster_offset & 511) == 0); + ret = qcow2_pre_write_overlap_check(bs, 0, + cluster_offset + offset_in_cluster, + cur_bytes, true); + if (ret < 0) { + goto out_locked; + } + + qemu_co_mutex_unlock(&s->lock); + qemu_iovec_reset(&hd_qiov); qemu_iovec_concat(&hd_qiov, qiov, bytes_done, cur_bytes); @@ -2184,7 +2193,7 @@ static coroutine_fn int qcow2_co_pwritev(BlockDriverState *bs, uint64_t offset, * s->cluster_size); if (cluster_data == NULL) { ret = -ENOMEM; - goto fail; + goto out_unlocked; } } @@ -2199,40 +2208,34 @@ static coroutine_fn int qcow2_co_pwritev(BlockDriverState *bs, uint64_t offset, cluster_data, cur_bytes, NULL) < 0) { ret = -EIO; - goto fail; + goto out_unlocked; } qemu_iovec_reset(&hd_qiov); qemu_iovec_add(&hd_qiov, cluster_data, cur_bytes); } - ret = qcow2_pre_write_overlap_check(bs, 0, - cluster_offset + offset_in_cluster, cur_bytes, true); - if (ret < 0) { - goto fail; - } - /* If we need to do COW, check if it's possible to merge the * writing of the guest data together with that of the COW regions. * If it's not possible (or not necessary) then write the * guest data now. */ if (!merge_cow(offset, cur_bytes, &hd_qiov, l2meta)) { - qemu_co_mutex_unlock(&s->lock); BLKDBG_EVENT(bs->file, BLKDBG_WRITE_AIO); trace_qcow2_writev_data(qemu_coroutine_self(), cluster_offset + offset_in_cluster); ret = bdrv_co_pwritev(s->data_file, cluster_offset + offset_in_cluster, cur_bytes, &hd_qiov, 0); - qemu_co_mutex_lock(&s->lock); if (ret < 0) { - goto fail; + goto out_unlocked; } } + qemu_co_mutex_lock(&s->lock); + ret = qcow2_handle_l2meta(bs, &l2meta, true); if (ret) { - goto fail; + goto out_locked; } bytes -= cur_bytes; @@ -2241,8 +2244,12 @@ static coroutine_fn int qcow2_co_pwritev(BlockDriverState *bs, uint64_t offset, trace_qcow2_writev_done_part(qemu_coroutine_self(), cur_bytes); } ret = 0; + goto out_locked; -fail: +out_unlocked: + qemu_co_mutex_lock(&s->lock); + +out_locked: qcow2_handle_l2meta(bs, &l2meta, false); qemu_co_mutex_unlock(&s->lock); |