Re: [Qemu-devel] [PATCH] blockdev: Print a warning for legacy drive options that belong to -device

[Thomas Huth <thuth@redhat.com>]

On 10.05.2017 17:55, Paolo Bonzini wrote:
> 
> 
> On 10/05/2017 17:50, Thomas Huth wrote:
>> We likely do not want to carry these legacy -drive options along forever.
>> Let's emit a deprecation warning for the -drive options that have a
>> replacement with the -device option, so that the (hopefully few) remaining
>> users are aware of this and can adapt their scripts / behaviour.
>>
>> Signed-off-by: Thomas Huth <thuth@redhat.com>
>> ---
>>  blockdev.c | 11 +++++++++++
>>  1 file changed, 11 insertions(+)
>>
>> diff --git a/blockdev.c b/blockdev.c
>> index 4d8cded..87a025a 100644
>> --- a/blockdev.c
>> +++ b/blockdev.c
>> @@ -797,6 +797,9 @@ DriveInfo *drive_new(QemuOpts *all_opts, BlockInterfaceType block_default_type)
>>      const char *filename;
>>      Error *local_err = NULL;
>>      int i;
>> +    const char *deprecated[] = {
>> +        "serial", "trans", "secs", "heads", "cyls"
>> +    };
>>  
>>      /* Change legacy command line options into QMP ones */
>>      static const struct {
>> @@ -880,6 +883,14 @@ DriveInfo *drive_new(QemuOpts *all_opts, BlockInterfaceType block_default_type)
>>                  "update your scripts.\n");
>>      }
>>  
>> +    /* Other deprecated options */
>> +    for (i = 0; i < ARRAY_SIZE(deprecated); i++) {
>> +        if (qemu_opt_get(legacy_opts, deprecated[i]) != NULL) {
>> +            error_report("'%s' is deprecated, please use the corresponding "
>> +                         "option of '-device' instead", deprecated[i]);
>> +        }
>> +    }
>> +
>>      /* Media type */
>>      value = qemu_opt_get(legacy_opts, "media");
>>      if (value) {
> 
> This one should be deprecated too (separate patch if you prefer).

I tried to add it, but then the deprecation message is always shown. I
think this happens because of the default CD-ROM drive is create in vl.c
with CDROM_OPTS (that is defined to "media=cdrom").
So no clue how to properly print a deprecation option for "media" here
right now (and it should likely be in a separate patch if there is a
solution).

 Thomas