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stream: Deal with filters

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Because of the (not so recent anymore) changes that make the stream job
independent of the base node and instead track the node above it, we
have to split that "bottom" node into two cases: The bottom COW node,
and the node directly above the base node (which may be an R/W filter
or the bottom COW node).

Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Max Reitz
2019-06-12 17:48:11 +02:00
committed by Kevin Wolf
parent cb8503159a
commit 67acfd2188
3 changed files with 59 additions and 21 deletions
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4
blockdev.c
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@@ -2528,7 +2528,9 @@ void qmp_block_stream(bool has_job_id, const char *job_id, const char *device,
}
/* Check for op blockers in the whole chain between bs and base */
for (iter = bs; iter && iter != base_bs; iter = backing_bs(iter)) {
for (iter = bs; iter && iter != base_bs;
iter = bdrv_filter_or_cow_bs(iter))
{
if (bdrv_op_is_blocked(iter, BLOCK_OP_TYPE_STREAM, errp)) {
goto out;
}