Re: [Xen-devel] [PATCH v4 3/3] libxl: rename checkpointed_stream to stream_type

[Wen Congyang <wency@xxxxxxxxxxxxxx>]

On 03/15/2016 08:54 PM, Wei Liu wrote:
> On Tue, Mar 15, 2016 at 09:58:37AM +0800, Wen Congyang wrote:
>> Signed-off-by: Wen Congyang <wency@xxxxxxxxxxxxxx>
>> ---
>> v3->v4: Remove the new macro, and updte the macro 
>> LIBXL_HAVE_CHECKPOINTED_STREAM
>>  tools/libxl/libxl.c              |  4 ++--
>>  tools/libxl/libxl.h              |  4 +++-
>>  tools/libxl/libxl_create.c       |  4 ++--
>>  tools/libxl/libxl_dom_save.c     |  6 +++---
>>  tools/libxl/libxl_internal.h     |  2 +-
>>  tools/libxl/libxl_save_callout.c |  4 ++--
>>  tools/libxl/libxl_stream_read.c  |  4 ++--
>>  tools/libxl/libxl_stream_write.c |  2 +-
>>  tools/libxl/libxl_types.idl      |  2 +-
>>  tools/libxl/xl_cmdimpl.c         | 16 ++++++++--------
>>  10 files changed, 25 insertions(+), 23 deletions(-)
>>
>> diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
>> index 93e228d..7579dd2 100644
>> --- a/tools/libxl/libxl.c
>> +++ b/tools/libxl/libxl.c
>> @@ -876,7 +876,7 @@ int libxl_domain_remus_start(libxl_ctx *ctx, 
>> libxl_domain_remus_info *info,
>>      dss->live = 1;
>>      dss->debug = 0;
>>      dss->remus = info;
>> -    dss->checkpointed_stream = LIBXL_CHECKPOINTED_STREAM_REMUS;
>> +    dss->stream_type = LIBXL_CHECKPOINTED_STREAM_REMUS;
>>  
>>      assert(info);
>>  
>> @@ -937,7 +937,7 @@ int libxl_domain_suspend(libxl_ctx *ctx, uint32_t domid, 
>> int fd, int flags,
>>      dss->type = type;
>>      dss->live = flags & LIBXL_SUSPEND_LIVE;
>>      dss->debug = flags & LIBXL_SUSPEND_DEBUG;
>> -    dss->checkpointed_stream = LIBXL_CHECKPOINTED_STREAM_NONE;
>> +    dss->stream_type = LIBXL_CHECKPOINTED_STREAM_NONE;
>>  
>>      rc = libxl__fd_flags_modify_save(gc, dss->fd,
>>                                       ~(O_NONBLOCK|O_NDELAY), 0,
>> diff --git a/tools/libxl/libxl.h b/tools/libxl/libxl.h
>> index f9e3ef5..c55094b 100644
>> --- a/tools/libxl/libxl.h
>> +++ b/tools/libxl/libxl.h
>> @@ -879,7 +879,9 @@ void libxl_mac_copy(libxl_ctx *ctx, libxl_mac *dst, 
>> libxl_mac *src);
>>  /*
>>   * LIBXL_HAVE_CHECKPOINTED_STREAM
>>   *
>> - * If this is defined, then libxl_checkpointed_stream exists.
>> + * If this is defined, then libxl_checkpointed_stream exists, and the
>> + * libxl_domain_create_restore() interface's parameter checkpointed_stream
>> + * is renamed to stream_type
>>   */
>>  #define LIBXL_HAVE_CHECKPOINTED_STREAM 1
> 
> I just realised this patch have not provided compatibility shim for
> older version of LIBXL_API.
> 
> It now breaks backward compatibility because it changes existing API.
> It's my fault for not observing this earlier, sorry.
> 
> On the other hand, I don't think this patch is strictly necessary.
> Andrew's original complain was about libxc not exporting XC_MIG_* types.
> I think libxl can function just fine as is with the old name.
> 
> So if you really wish to change the name of that field, I'm afraid
> compatibility shim for all functions that accept
> libxl_domain_restore_params is required.
> 
> I suggest we drop this patch for now and focus on core COLO
> functionality, what do you think?

It is OK to drop this patch.

Thanks
Wen Congyang

> 
> Wei.
> 
> 
> .
> 




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