qmp: add block_job_set_speed command
Add block_job_set_speed, which sets the maximum speed for a background
block operation.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Acked-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
diff --git a/blockdev.c b/blockdev.c
index 06f179e..4c8fcdd 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -964,3 +964,28 @@
trace_qmp_block_stream(bs, bs->job);
}
+
+static BlockJob *find_block_job(const char *device)
+{
+ BlockDriverState *bs;
+
+ bs = bdrv_find(device);
+ if (!bs || !bs->job) {
+ return NULL;
+ }
+ return bs->job;
+}
+
+void qmp_block_job_set_speed(const char *device, int64_t value, Error **errp)
+{
+ BlockJob *job = find_block_job(device);
+
+ if (!job) {
+ error_set(errp, QERR_DEVICE_NOT_ACTIVE, device);
+ return;
+ }
+
+ if (block_job_set_speed(job, value) < 0) {
+ error_set(errp, QERR_NOT_SUPPORTED);
+ }
+}
