block: Add .bdrv_truncate() error messages

Add missing error messages for the block driver implementations of
.bdrv_truncate(); drop the generic one from block.c's bdrv_truncate().

Since one of these changes touches a mis-indented block in
block/file-posix.c, this patch fixes that coding style issue along the
way.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20170328205129.15138-5-mreitz@redhat.com
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>

1 files changed, 0 insertions, 2 deletions

diff --git a/block.c b/block.c
index ff232a2..76bf00f 100644
--- a/block.c
+++ b/block.c
@@ -3334,8 +3334,6 @@ int bdrv_truncate(BdrvChild *child, int64_t offset, Error **errp)
         bdrv_dirty_bitmap_truncate(bs);
         bdrv_parent_cb_resize(bs);
         ++bs->write_gen;
-    } else if (errp && !*errp) {
-        error_setg_errno(errp, -ret, "Failed to resize image");
     }
     return ret;
 }