Re: [Qemu-devel] [Avocado-devel] [PATCH] net/slirp: Tell the users when they are using deprecated options

[Jason Wang <jasowang@redhat.com>]

On 01/13/2016 03:27 PM, Thomas Huth wrote:
> On 13.01.2016 04:13, Jason Wang wrote:
>>
>> On 01/13/2016 10:58 AM, Jason Wang wrote:
>>> On 01/12/2016 07:45 PM, Cleber Rosa wrote:
>>>> ----- Original Message -----
>>>>> From: "Thomas Huth" <thuth@redhat.com>
>>>>> To: "Jason Wang" <jasowang@redhat.com>, "Jan Kiszka" <jan.kiszka@siemens.com>, qemu-devel@nongnu.org
>>>>> Cc: "Paolo Bonzini" <pbonzini@redhat.com>, avocado-devel@redhat.com, "Markus Armbruster" <armbru@redhat.com>
>>>>> Sent: Tuesday, January 12, 2016 5:26:36 AM
>>>>> Subject: Re: [Qemu-devel] [PATCH] net/slirp: Tell the users when they are using deprecated options
>>>>>
>>>>> On 12.01.2016 04:42, Jason Wang wrote:
>>>>>> On 01/11/2016 11:55 PM, Thomas Huth wrote:
>>>>>>> On 15.12.2015 09:35, Thomas Huth wrote:
>>>>>>>> We don't want to support the legacy -tftp, -bootp, -smb and
>>>>>>>> -net channel options forever. So let's start telling the users
>>>>>>>> that they will go away in a future version.
>>>>>>>>
>>>>>>>> Signed-off-by: Thomas Huth <thuth@redhat.com>
>>>>>>>> ---
>>>>>>>>  net/slirp.c | 3 +++
>>>>>>>>  os-posix.c  | 3 +++
>>>>>>>>  vl.c        | 6 ++++++
>>>>>>>>  3 files changed, 12 insertions(+)
>>>>>>>>
>>>>>>>> diff --git a/net/slirp.c b/net/slirp.c
>>>>>>>> index f505570..65e3766 100644
>>>>>>>> --- a/net/slirp.c
>>>>>>>> +++ b/net/slirp.c
>>>>>>>> @@ -784,6 +784,9 @@ int net_slirp_parse_legacy(QemuOptsList *opts_list,
>>>>>>>> const char *optarg, int *ret
>>>>>>>>          return 0;
>>>>>>>>      }
>>>>>>>>  
>>>>>>>> +    error_report("The -net channel option is deprecated and "
>>>>>>>> +                 "will be removed in a future version.");
>>>>>>>> +
>>>>>>>>      /* handle legacy -net channel,port:chr */
>>>>>>>>      optarg += strlen("channel,");
>>>>>>>>  
>>>>>>>> diff --git a/os-posix.c b/os-posix.c
>>>>>>>> index e4da406..3f62f7c 100644
>>>>>>>> --- a/os-posix.c
>>>>>>>> +++ b/os-posix.c
>>>>>>>> @@ -40,6 +40,7 @@
>>>>>>>>  #include "net/slirp.h"
>>>>>>>>  #include "qemu-options.h"
>>>>>>>>  #include "qemu/rcu.h"
>>>>>>>> +#include "qemu/error-report.h"
>>>>>>>>  
>>>>>>>>  #ifdef CONFIG_LINUX
>>>>>>>>  #include <sys/prctl.h>
>>>>>>>> @@ -139,6 +140,8 @@ void os_parse_cmd_args(int index, const char *optarg)
>>>>>>>>      switch (index) {
>>>>>>>>  #ifdef CONFIG_SLIRP
>>>>>>>>      case QEMU_OPTION_smb:
>>>>>>>> +        error_report("The -smb option is deprecated and "
>>>>>>>> +                     "will be removed in a future version.");
>>>>>>>>          if (net_slirp_smb(optarg) < 0)
>>>>>>>>              exit(1);
>>>>>>>>          break;
>>>>>>>> diff --git a/vl.c b/vl.c
>>>>>>>> index 4211ff1..fa829c0 100644
>>>>>>>> --- a/vl.c
>>>>>>>> +++ b/vl.c
>>>>>>>> @@ -3314,12 +3314,18 @@ int main(int argc, char **argv, char **envp)
>>>>>>>>  #endif
>>>>>>>>  #ifdef CONFIG_SLIRP
>>>>>>>>              case QEMU_OPTION_tftp:
>>>>>>>> +                error_report("The -tftp option is deprecated and "
>>>>>>>> +                             "will be removed in a future version.");
>>>>>>>>                  legacy_tftp_prefix = optarg;
>>>>>>>>                  break;
>>>>>>>>              case QEMU_OPTION_bootp:
>>>>>>>> +                error_report("The -bootp option is deprecated and "
>>>>>>>> +                             "will be removed in a future version.");
>>>>>>>>                  legacy_bootp_filename = optarg;
>>>>>>>>                  break;
>>>>>>>>              case QEMU_OPTION_redir:
>>>>>>>> +                error_report("The -redir option is deprecated and "
>>>>>>>> +                             "will be removed in a future version.");
>>>>>>>>                  if (net_slirp_redir(optarg) < 0)
>>>>>>>>                      exit(1);
>>>>>>>>                  break;
>>>>>>> *ping*
>>>>>>>
>>>>>>> Any comments on these old options? I hope Paolo does not want to keep
>>>>>>> them, too, forever ;-)
>>>>>> I vaguely remember autotest use those options in the past for guest os
>>>>>> installation. May need input from autotest guys.
>>>>> Looking at
>>>>>  https://github.com/avocado-framework/avocado-vt/blob/master/virttest/qemu_vm.py
>>>>> it seems like that latest incarnation of autotest is doing it
>>>>> right already:
>>>>> ...
>>>>>         def add_tftp(devices, filename):
>>>>>             # If the new syntax is supported, don't add -tftp
>>>>>             if "[,tftp=" in devices.get_help_text():
>>>>>                 return ""
>>>>>             else:
>>>>>                 return " -tftp '%s'" % filename
>>>>> ...
>>>>>         def add_net(devices, vlan, nettype, ifname=None, tftp=None,
>>>>>                     bootfile=None, hostfwd=[], netdev_id=None,
>>>>>                     netdev_extra_params=None, tapfds=None, script=None,
>>>>>                     downscript=None, vhost=None, queues=None, vhostfds=None,
>>>>>                     add_queues=None, helper=None, add_tapfd=None,
>>>>>                     add_vhostfd=None, vhostforce=None):
>>>>> ...
>>>>>            elif mode == "user":
>>>>>                 if tftp and "[,tftp=" in devices.get_help_text():
>>>>>                     cmd += ",tftp='%s'" % tftp
>>>>>                     cmd_nd = cmd
>>>>> ... etc ...
>>>>>
>>>>> So I think that avocado should be fine already.
>>>> It should.
>>>>
>>>> Avocado-VT can usually handle whatever version of QEMU is thrown at it
>>>> because it usually checks for specific features and command syntax.
>>>>
>>>> So, if a feature is removed and Avocado-VT is not handling that properly,
>>>> then it's a bug on "our" side.
>>>>
>>>> Cleber.
>>> Sounds very cool.
>>>
>>> Apply this to my -net.
>>>
>>> Thanks everyone.
>> Rethinking about this.  I'm not quite sure we can remove those
>> especially "-net user". Google qemu "-net user" gives about 15,900
>> results (and the first link is qemu wiki). Maybe we can replace "will be
>> removed in a future version." with something like "was suggested to use
>> -netdev user,XXX" instead?
> This patch was not about removing "-net user", only about removing the
> standalone options "-tftp", "-smb", "-bootp", "-redir" and "-net
> channel" which have equivalents with "-netdev user,..." (or
> "-netd user,...").

Right, I misread the patch. Sorry.

>
> Anyway, since Paolo requested to rework this patch to include hints for
> what should be used instead (which is a good idea), 

I thought it was Markus :) ?

> I'm going to rewrite
> my patch, so please stay tuned for a new version.
>
>  Thomas
>

Ok