[Xen-changelog] [xen master] tools/libxl: run_helper - add #define for arguments.

[patchbot@xxxxxxx]

commit dfea696c7cab7a8eafcecddca103b610eb51b8df
Author:     Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
AuthorDate: Tue Jan 26 16:31:00 2016 -0500
Commit:     Ian Campbell <ian.campbell@xxxxxxxxxx>
CommitDate: Wed Feb 3 11:17:48 2016 +0000

    tools/libxl: run_helper - add #define for arguments.
    
    Describe what the four (or more in the future) arguments
    are for.
    
    Acked-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
    Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
---
 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;
 
--
generated by git-patchbot for /home/xen/git/xen.git#master

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