[PATCH v9 02/11] libxl: support SHUTDOWN_soft_reset shutdown reason

[Vitaly Kuznetsov <vkuznets@redhat.com>]

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@redhat.com>
---
Changes since v8:
- Introduce on_soft_reset here (moved from PATCH 11) [Ian Jackson]
---
 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 382f30b..3489b27 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 8dacf8d..337257a 100644
--- a/tools/libxl/libxl_types.idl
+++ b/tools/libxl/libxl_types.idl
@@ -181,6 +181,7 @@ 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", [
@@ -609,6 +610,7 @@ 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 971209c..c7aaa19 100644
--- a/tools/libxl/xl_cmdimpl.c
+++ b/tools/libxl/xl_cmdimpl.c
@@ -1337,6 +1337,13 @@ 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. */
@@ -2334,6 +2341,9 @@ 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);
@@ -3758,7 +3768,7 @@ 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