Re: [Xen-devel] [PATCH v10 02/11] libxl: support SHUTDOWN_soft_reset shutdown reason

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Tue, Jul 28, 2015 at 03:28:07PM +0200, Vitaly Kuznetsov wrote:
> Use letter 'S' to indicate a domain in such state. Introduce new
> 'on_soft_reset' action and default it to 'restart' for now.
> 
> Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>

Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
> ---
> Changes since v9:
> - None
> ---
>  docs/man/xl.cfg.pod.5             |  5 +++++
>  tools/libxl/libxl_types.idl       |  2 ++
>  tools/libxl/xl_cmdimpl.c          | 12 +++++++++++-
>  tools/python/xen/lowlevel/xl/xl.c |  1 +
>  4 files changed, 19 insertions(+), 1 deletion(-)
> 
> diff --git a/docs/man/xl.cfg.pod.5 b/docs/man/xl.cfg.pod.5
> index c78c3ba..69935d9 100644
> --- a/docs/man/xl.cfg.pod.5
> +++ b/docs/man/xl.cfg.pod.5
> @@ -364,6 +364,11 @@ Default is C<destroy>.
>  
>  Action to take if the domain crashes.  Default is C<destroy>.
>  
> +=item B<on_soft_reset="ACTION">
> +
> +Action to take if the domain performs 'soft reset' (e.g. does kexec).
> +Default is C<restart>.
> +
>  =back
>  
>  =head3 Direct Kernel Boot
> diff --git a/tools/libxl/libxl_types.idl b/tools/libxl/libxl_types.idl
> index ef346e7..9f6ec00 100644
> --- a/tools/libxl/libxl_types.idl
> +++ b/tools/libxl/libxl_types.idl
> @@ -192,6 +192,7 @@ libxl_shutdown_reason = Enumeration("shutdown_reason", [
>      (2, "suspend"),
>      (3, "crash"),
>      (4, "watchdog"),
> +    (5, "soft_reset"),
>      ], init_val = "LIBXL_SHUTDOWN_REASON_UNKNOWN")
>  
>  libxl_vga_interface_type = Enumeration("vga_interface_type", [
> @@ -637,6 +638,7 @@ libxl_domain_config = Struct("domain_config", [
>      ("on_reboot", libxl_action_on_shutdown),
>      ("on_watchdog", libxl_action_on_shutdown),
>      ("on_crash", libxl_action_on_shutdown),
> +    ("on_soft_reset", libxl_action_on_shutdown),
>      ], dir=DIR_IN)
>  
>  libxl_diskinfo = Struct("diskinfo", [
> diff --git a/tools/libxl/xl_cmdimpl.c b/tools/libxl/xl_cmdimpl.c
> index d0bf0cb..fcd30e9 100644
> --- a/tools/libxl/xl_cmdimpl.c
> +++ b/tools/libxl/xl_cmdimpl.c
> @@ -1395,6 +1395,13 @@ static void parse_config_data(const char 
> *config_source,
>          exit(1);
>      }
>  
> +    if (xlu_cfg_get_string (config, "on_soft_reset", &buf, 0))
> +        buf = "restart";
> +    if (!parse_action_on_shutdown(buf, &d_config->on_soft_reset)) {
> +        fprintf(stderr, "Unknown on_soft_reset action \"%s\" specified\n", 
> buf);
> +        exit(1);
> +    }
> +
>      /* libxl_get_required_shadow_memory() must be called after final values
>       * (default or specified) for vcpus and memory are set, because the
>       * calculation depends on those values. */
> @@ -2415,6 +2422,9 @@ static int handle_domain_death(uint32_t *r_domid,
>      case LIBXL_SHUTDOWN_REASON_WATCHDOG:
>          action = d_config->on_watchdog;
>          break;
> +    case LIBXL_SHUTDOWN_REASON_SOFT_RESET:
> +        action = d_config->on_soft_reset;
> +        break;
>      default:
>          LOG("Unknown shutdown reason code %d. Destroying domain.",
>              event->u.domain_shutdown.shutdown_reason);
> @@ -3835,7 +3845,7 @@ static void list_domains(bool verbose, bool context, 
> bool claim, bool numa,
>                           bool cpupool, const libxl_dominfo *info, int 
> nb_domain)
>  {
>      int i;
> -    static const char shutdown_reason_letters[]= "-rscw";
> +    static const char shutdown_reason_letters[]= "-rscwS";
>      libxl_bitmap nodemap;
>      libxl_physinfo physinfo;
>  
> diff --git a/tools/python/xen/lowlevel/xl/xl.c 
> b/tools/python/xen/lowlevel/xl/xl.c
> index 32f982a..7c61160 100644
> --- a/tools/python/xen/lowlevel/xl/xl.c
> +++ b/tools/python/xen/lowlevel/xl/xl.c
> @@ -784,6 +784,7 @@ PyMODINIT_FUNC initxl(void)
>      _INT_CONST_LIBXL(m, SHUTDOWN_REASON_SUSPEND);
>      _INT_CONST_LIBXL(m, SHUTDOWN_REASON_CRASH);
>      _INT_CONST_LIBXL(m, SHUTDOWN_REASON_WATCHDOG);
> +    _INT_CONST_LIBXL(m, SHUTDOWN_REASON_SOFT_RESET);
>  
>      genwrap__init(m);
>  }
> -- 
> 2.4.3
> 

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