block: add 'speed' optional parameter to block-stream

Allow streaming operations to be started with an initial speed limit.
This eliminates the window of time between starting streaming and
issuing block-job-set-speed.  Users should use the new optional 'speed'
parameter instead so that speed limits are in effect immediately when
the job starts.

Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Acked-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/block/stream.c b/block/stream.c
index b66242a7b8..6724af2764 100644
--- a/block/stream.c
+++ b/block/stream.c
@@ -281,13 +281,14 @@ static BlockJobType stream_job_type = {
 };
 
 void stream_start(BlockDriverState *bs, BlockDriverState *base,
-                  const char *base_id, BlockDriverCompletionFunc *cb,
+                  const char *base_id, int64_t speed,
+                  BlockDriverCompletionFunc *cb,
                   void *opaque, Error **errp)
 {
     StreamBlockJob *s;
     Coroutine *co;
 
-    s = block_job_create(&stream_job_type, bs, cb, opaque, errp);
+    s = block_job_create(&stream_job_type, bs, speed, cb, opaque, errp);
     if (!s) {
         return;
     }