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Re: [Qemu-devel] [PATCH v4 10/28] qmp: Improve QMP dispatch error messag


From: Markus Armbruster
Subject: Re: [Qemu-devel] [PATCH v4 10/28] qmp: Improve QMP dispatch error messages
Date: Sun, 05 Mar 2017 09:01:07 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.1 (gnu/linux)

Philippe Mathieu-Daudé <address@hidden> writes:

> Hi Markus,
>
> On 03/03/2017 09:32 AM, Markus Armbruster wrote:
>> Signed-off-by: Markus Armbruster <address@hidden>
>> Reviewed-by: Eric Blake <address@hidden>
>> ---
>>  qapi/qmp-dispatch.c | 14 ++++++++------
>>  1 file changed, 8 insertions(+), 6 deletions(-)
>>
>> diff --git a/qapi/qmp-dispatch.c b/qapi/qmp-dispatch.c
>> index 23b0528..578c6d8 100644
>> --- a/qapi/qmp-dispatch.c
>> +++ b/qapi/qmp-dispatch.c
>> @@ -30,7 +30,7 @@ static QDict *qmp_dispatch_check_obj(const QObject 
>> *request, Error **errp)
>>
>>      dict = qobject_to_qdict(request);
>>      if (!dict) {
>> -        error_setg(errp, "Expected '%s' in QMP input", "object");
>> +        error_setg(errp, "QMP input must be a JSON object");
>>          return NULL;
>>      }
>>
>> @@ -41,15 +41,17 @@ static QDict *qmp_dispatch_check_obj(const QObject 
>> *request, Error **errp)
>>
>>          if (!strcmp(arg_name, "execute")) {
>>              if (qobject_type(arg_obj) != QTYPE_QSTRING) {
>> -                error_setg(errp, "QMP input object member '%s' expects 
>> '%s'",
>> -                           "execute", "string");
>> +                error_setg(errp,
>> +                           "QMP input object member '%s' must be %s",
>> +                           "execute", "a string");
>
> let's avoid formatting like the rest of this patch.
>
>>                  return NULL;
>>              }
>>              has_exec_key = true;
>>          } else if (!strcmp(arg_name, "arguments")) {
>>              if (qobject_type(arg_obj) != QTYPE_QDICT) {
>> -                error_setg(errp, "QMP input object member '%s' expects 
>> '%s'",
>> -                           "arguments", "object");
>> +                error_setg(errp,
>> +                           "QMP input object member '%s' must be %s",
>> +                           "arguments", "an object");
>
> same.
>
>>                  return NULL;
>>              }
>>          } else {
>> @@ -60,7 +62,7 @@ static QDict *qmp_dispatch_check_obj(const QObject 
>> *request, Error **errp)
>>      }
>>
>>      if (!has_exec_key) {
>> -        error_setg(errp, "Expected '%s' in QMP input", "execute");
>> +        error_setg(errp, "QMP input object lacks key 'execute'");
>>          return NULL;
>>      }
>>
>>

Since substantial other work depends on this series, it needs to go in
sooner rather than later.  I'm therefore *dropping* this patch from the
series.  We can then bikeshed^Wpolish to our heart's content without
holding up other work.

That said: what about this?

diff --git a/qapi/qmp-dispatch.c b/qapi/qmp-dispatch.c
index dc50212..5ad36f8 100644
--- a/qapi/qmp-dispatch.c
+++ b/qapi/qmp-dispatch.c
@@ -30,7 +30,7 @@ static QDict *qmp_dispatch_check_obj(const QObject *request, 
Error **errp)
 
     dict = qobject_to_qdict(request);
     if (!dict) {
-        error_setg(errp, "Expected '%s' in QMP input", "object");
+        error_setg(errp, "QMP input must be a JSON object");
         return NULL;
     }
 
@@ -41,26 +41,26 @@ static QDict *qmp_dispatch_check_obj(const QObject 
*request, Error **errp)
 
         if (!strcmp(arg_name, "execute")) {
             if (qobject_type(arg_obj) != QTYPE_QSTRING) {
-                error_setg(errp, "QMP input object member '%s' expects '%s'",
-                           "execute", "string");
+                error_setg(errp,
+                           "QMP input member 'execute' must be a string");
                 return NULL;
             }
             has_exec_key = true;
         } else if (!strcmp(arg_name, "arguments")) {
             if (qobject_type(arg_obj) != QTYPE_QDICT) {
-                error_setg(errp, "QMP input object member '%s' expects '%s'",
-                           "arguments", "object");
+                error_setg(errp,
+                           "QMP input member 'arguments' must be an object");
                 return NULL;
             }
         } else {
-            error_setg(errp, "QMP input object member '%s' is unexpected",
+            error_setg(errp, "QMP input member '%s' is unexpected",
                        arg_name);
             return NULL;
         }
     }
 
     if (!has_exec_key) {
-        error_setg(errp, "Expected '%s' in QMP input", "execute");
+        error_setg(errp, "QMP input lacks member 'execute'");
         return NULL;
     }
 



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