diff options
| author | Eric Blake <eblake@redhat.com> | 2021-07-08 10:52:28 -0500 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2021-07-09 13:19:09 +0200 |
| commit | a7cd44bef3d9380181734a93977c3d1df3eef2cf (patch) | |
| tree | b8b49470b14ac797041c137b0d8f38fae444023f /qemu-img.c | |
| parent | 497a30dbb065937d67f6c43af6dd78492e1d6f6d (diff) | |
qemu-img: Improve error for rebase without backing format
When removeing support for qemu-img being able to create backing
chains without embedded backing formats, we caused a poor error
message as caught by iotest 114. Improve the situation to inform the
user what went wrong.
Suggested-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20210708155228.2666172-1-eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'qemu-img.c')
| -rw-r--r-- | qemu-img.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/qemu-img.c b/qemu-img.c index ec0e2fabe5..7c4fc60312 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -3767,6 +3767,9 @@ static int img_rebase(int argc, char **argv) if (ret == -ENOSPC) { error_report("Could not change the backing file to '%s': No " "space left in the file header", out_baseimg); + } else if (ret == -EINVAL && out_baseimg && !out_basefmt) { + error_report("Could not change the backing file to '%s': backing " + "format must be specified", out_baseimg); } else if (ret < 0) { error_report("Could not change the backing file to '%s': %s", out_baseimg, strerror(-ret)); |