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-rw-r--r--block/qcow2.c35
1 files changed, 21 insertions, 14 deletions
diff --git a/block/qcow2.c b/block/qcow2.c
index 4a89850389..4b4a0ce6e0 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);