Add some debugging to flag servers that are not compliant to
the NBD protocol.  This would have flagged the server bug
fixed in commit c0301fcc.

Signed-off-by: Eric Blake <ebl...@redhat.com>
Reviewed-by: Alex Bligh <a...@alex.org.uk>

---
v3: later in series, but no change
---
 nbd/client.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/nbd/client.c b/nbd/client.c
index 937344c..4659df3 100644
--- a/nbd/client.c
+++ b/nbd/client.c
@@ -33,8 +33,10 @@ static int nbd_errno_to_system_errno(int err)
         return ENOMEM;
     case NBD_ENOSPC:
         return ENOSPC;
+    default:
+        TRACE("Squashing unexpected error %d to EINVAL", err);
+        /* fallthrough */
     case NBD_EINVAL:
-    default:
         return EINVAL;
     }
 }
-- 
2.5.5


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