On Tue, 2016-01-26 at 16:31 -0500, Konrad Rzeszutek Wilk wrote:
> Describe what the four (or more in the future) arguments
> are for.
>
> Acked-by: Ian Jackson <ian.jack...@eu.citrix.com>
> Signed-off-by: Konrad Rzeszutek Wilk <konrad.w...@oracle.com>
applied.
> ---
> tools/libxl/libxl_save_callout.c | 11 ++++++++++-
> 1 file changed, 10 insertions(+), 1 deletion(-)
>
> diff --git a/tools/libxl/libxl_save_callout.c
> b/tools/libxl/libxl_save_callout.c
> index 3af99af..45b9727 100644
> --- a/tools/libxl/libxl_save_callout.c
> +++ b/tools/libxl/libxl_save_callout.c
> @@ -119,13 +119,22 @@ void
> libxl__save_helper_init(libxl__save_helper_state *shs)
>
> /*----- helper execution -----*/
>
> +/*
> + * Both save and restore share four parameters:
> + * 1) Path to libxl-save-helper.
> + * 2) --[restore|save]-domain.
> + * 3) stream file descriptor.
> + * n) save/restore specific parameters.
> + * 4) A \0 at the end.
> + */
> +#define HELPER_NR_ARGS 4
> static void run_helper(libxl__egc *egc, libxl__save_helper_state *shs,
> const char *mode_arg, int stream_fd,
> const int *preserve_fds, int num_preserve_fds,
> const unsigned long *argnums, int num_argnums)
> {
> STATE_AO_GC(shs->ao);
> - const char *args[4 + num_argnums];
> + const char *args[HELPER_NR_ARGS + num_argnums];
> const char **arg = args;
> int i, rc;
>
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