From: Eric Blake <eblake@redhat.com>
Date: Tue, 28 Apr 2020 19:26:48 +0000 (-0500)
Subject: qcow2: Tweak comment about bitmaps vs. resize
X-Git-Tag: v5.1.0-rc0~141^2~7
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ee1244a2e96288ba3c2f3a9a82b97f5617939d9f;p=thirdparty%2Fqemu.git

qcow2: Tweak comment about bitmaps vs. resize

Our comment did not actually match the code.  Rewrite the comment to
be less sensitive to any future changes to qcow2-bitmap.c that might
implement scenarios that we currently reject.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200428192648.749066-4-eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
---

diff --git a/block/qcow2.c b/block/qcow2.c
index 3e8b3d022b8..ad934109a81 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -3999,7 +3999,7 @@ static int coroutine_fn qcow2_co_truncate(BlockDriverState *bs, int64_t offset,
         goto fail;
     }
 
-    /* cannot proceed if image has bitmaps */
+    /* See qcow2-bitmap.c for which bitmap scenarios prevent a resize. */
     if (qcow2_truncate_bitmaps_check(bs, errp)) {
         ret = -ENOTSUP;
         goto fail;