Re: [Xen-devel] backport requests for 4.x-testing

[Teck Choon Giam <giamteckchoon@xxxxxxxxx>]

On Wed, Apr 4, 2012 at 3:50 AM, Teck Choon Giam <giamteckchoon@xxxxxxxxx> wrote:
> On Wed, Apr 4, 2012 at 12:58 AM, Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx> 
> wrote:
>> Teck Choon Giam writes ("Re: [Xen-devel] backport requests for 4.x-testing"):
>>> On Tue, Apr 3, 2012 at 11:08 PM, Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx> 
>>> wrote:
>>> > I'm not really convinced that these are appropriate for backporting to
>>> > a supposedly stable tree.
>>>
>>> What about the changeset 25131:6f81f4d79fde?  It won't be able to
>>> apply cleanly in xen-4.1-testing though and I can provide the backport
>>> version for review if you give an OK?
>>
>> I would be happy to consider a backport of 25131, yes.  You'll have to
>> do some work as 4.1 doesn't have libxl_defbool_*.
>
> Not just libxl_defbool_* but also couple others :p
>
> Anyway, here is my backport which I have tested and worked as
> described in 
> http://lists.xen.org/archives/html/xen-devel/2012-03/msg01452.html
> For your review and comments please.
>
>
> libxl: support for "rtc_timeoffset" and "localtime"
>
> Implement "rtc_timeoffset" and "localtime" options compatible as xm.
>
> rtc_timeoffset is the offset between host time and guest time.
> localtime means to specify whether the emulted RTC appears as UTC or is
> offset by the host.
>
> xen-unstable changeset: 25131:6f81f4d79fde
>
> Signed-off-by: Giam Teck Choon <giamteckchoon@xxxxxxxxx>
>
> ---
>  tools/libxl/libxl.idl    |    2 ++
>  tools/libxl/libxl_dom.c  |    3 +++
>  tools/libxl/xl_cmdimpl.c |   13 +++++++++++++
>  3 files changed, 18 insertions(+), 0 deletions(-)
>
> diff --git a/tools/libxl/libxl.idl b/tools/libxl/libxl.idl
> index 377417a..3193506 100644
> --- a/tools/libxl/libxl.idl
> +++ b/tools/libxl/libxl.idl
> @@ -94,6 +94,8 @@ libxl_domain_build_info = Struct("domain_build_info",[
>     ("target_memkb",    uint32),
>     ("video_memkb",     uint32),
>     ("shadow_memkb",    uint32),
> +    ("rtc_timeoffset",  uint32),
> +    ("localtime",       bool),
>     ("disable_migrate", bool),
>     ("kernel",          libxl_file_reference),
>     ("cpuid",           libxl_cpuid_policy_list),
> diff --git a/tools/libxl/libxl_dom.c b/tools/libxl/libxl_dom.c
> index c702cf7..7ab78db 100644
> --- a/tools/libxl/libxl_dom.c
> +++ b/tools/libxl/libxl_dom.c
> @@ -76,6 +76,9 @@ int libxl__build_pre(libxl_ctx *ctx, uint32_t domid,
>     if ( info->disable_migrate )
>         xc_domain_disable_migrate(ctx->xch, domid);
>
> +    if (info->rtc_timeoffset)
> +        xc_domain_set_time_offset(ctx->xch, domid, info->rtc_timeoffset);
> +
>     if (info->hvm) {
>         unsigned long shadow;
>         shadow = (info->shadow_memkb + 1023) / 1024;
> diff --git a/tools/libxl/xl_cmdimpl.c b/tools/libxl/xl_cmdimpl.c
> index 2dbced7..74545a5 100644
> --- a/tools/libxl/xl_cmdimpl.c
> +++ b/tools/libxl/xl_cmdimpl.c
> @@ -737,6 +737,19 @@ static void parse_config_data(const char
> *configfile_filename_report,
>     if (!xlu_cfg_get_long(config, "tsc_mode", &l))
>         b_info->tsc_mode = l;
>
> +    b_info->rtc_timeoffset = !xlu_cfg_get_long(config,
> "rtc_timeoffset", &l) ? l : 0;

Ops... forgot about coding style... need to be within 80 column... I
will roll out another patch to fix this after your review.  Sorry :(

Thanks.

Kindest regards,
Giam Teck Choon


> +
> +    b_info->localtime = !xlu_cfg_get_long(config, "localtime", &l) ? l : 0;
> +    if (b_info->localtime) {
> +        time_t t;
> +        struct tm *tm;
> +
> +        t = time(NULL);
> +        tm = localtime(&t);
> +
> +        b_info->rtc_timeoffset += tm->tm_gmtoff;
> +    }
> +
>     if (!xlu_cfg_get_long (config, "videoram", &l))
>         b_info->video_memkb = l * 1024;
>
>
>
>>
>> Thanks,
>> Ian.
>
> Thanks.
>
> Kindest regards,
> Giam Teck Choon

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