Re: [PATCH 4/5] dump: Improve some dump-guest-memory error messages

[Markus Armbruster <armbru@redhat.com>]

Philippe Mathieu-Daudé <philmd@linaro.org> writes:

> Hi Markus,
>
> On 30/10/23 14:37, Markus Armbruster wrote:
>> Zero @length is rejected with "Invalid parameter 'length'".  Improve
>> to "Parameter 'length' expects a non-zero length".
>>
>> @protocol values not starting with "fd:" or "file:" are rejected with
>> "Invalid parameter 'protocol'".  Improve to "parameter 'protocol' must
>> start with 'file:' or 'fd:'".
>>
>> While there, make the conditional checking @protocol a little more
>> obvious.
>>
>> Signed-off-by: Markus Armbruster <armbru@redhat.com>
>> ---
>>   dump/dump.c | 16 +++++++---------
>>   1 file changed, 7 insertions(+), 9 deletions(-)
>> diff --git a/dump/dump.c b/dump/dump.c
>> index a5e9a06ef1..d888e4bd3c 100644
>> --- a/dump/dump.c
>> +++ b/dump/dump.c
>> @@ -1812,7 +1812,8 @@ static void dump_init(DumpState *s, int fd, bool has_format,
>>         s->fd = fd;
>>       if (has_filter && !length) {
>> -        error_setg(errp, QERR_INVALID_PARAMETER, "length");
>> +        error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "length",
>
> Per commit 4629ed1e98 ("qerror: Finally unused, clean up", 2015):
>
>  /*
>   * These macros will go away, please don't use in new code, ...
>
> Instead we can use:
>
>            error_setg(errp, "Parameter '%s' expects %s", "length",

I left this to the next version of your "qapi: Kill 'qapi/qmp/qerror.h'
for good" out of laziness.  Since you prefer the deed to be done right
away, I will in v2.

>> +                   "a non-zero size");
>>           goto cleanup;
>>       }