block/backup: disable copy_range for compressed backup

Enabled by default copy_range ignores compress option. It's definitely
unexpected for user.

It's broken since introduction of copy_range usage in backup in
9ded4a011496.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-id: 20190730163251.755248-3-vsementsov@virtuozzo.com
Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Max Reitz <mreitz@redhat.com>
(cherry picked from commit 110571be4e70ac015628e76d2731f96dd8d1998c)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>

diff --git a/block/backup.c b/block/backup.c
index f67c208cf0f9083661338aae7a603627b107d565..381659d5efab905db623ef16c76625bfa86ee3a9 100644 (file)
--- a/block/backup.c
+++ b/block/backup.c
@@ -666,7 +666,7 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
     job->cluster_size = cluster_size;
     job->copy_bitmap = copy_bitmap;
     copy_bitmap = NULL;
-    job->use_copy_range = true;
+    job->use_copy_range = !compress; /* compression isn't supported for it */
     job->copy_range_size = MIN_NON_ZERO(blk_get_max_transfer(job->common.blk),
                                         blk_get_max_transfer(job->target));
     job->copy_range_size = MAX(job->cluster_size,