[PATCH v1 COLO Pre 05/12] tools/libxl: Introduce a new internal API libxl__domain_unpause()

[Yang Hongyang <yanghy@cn.fujitsu.com>]

From: Wen Congyang <wency@cn.fujitsu.com>

The guest is paused after libxl_domain_create_restore().
Secondary vm is running in colo mode. So we need to unpause
the guest. The current API libxl_domain_unpause() is
not an internal API. Introduce a new API to support it.
No functional change.

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Yang Hongyang <yanghy@cn.fujitsu.com>
---
 tools/libxl/libxl.c          | 20 ++++++++++++++------
 tools/libxl/libxl_internal.h |  1 +
 2 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
index 5b58312..98f2a4f 100644
--- a/tools/libxl/libxl.c
+++ b/tools/libxl/libxl.c
@@ -966,9 +966,8 @@ out:
     return AO_INPROGRESS;
 }
 
-int libxl_domain_unpause(libxl_ctx *ctx, uint32_t domid)
+int libxl__domain_unpause(libxl__gc *gc, uint32_t domid)
 {
-    GC_INIT(ctx);
     char *path;
     char *state;
     int ret, rc = 0;
@@ -980,7 +979,7 @@ int libxl_domain_unpause(libxl_ctx *ctx, uint32_t domid)
     }
 
     if (type == LIBXL_DOMAIN_TYPE_HVM) {
-        uint32_t dm_domid = libxl_get_stubdom_id(ctx, domid);
+        uint32_t dm_domid = libxl_get_stubdom_id(CTX, domid);
 
         path = libxl__device_model_xs_path(gc, dm_domid, domid, "/state");
         state = libxl__xs_read(gc, XBT_NULL, path);
@@ -990,12 +989,21 @@ int libxl_domain_unpause(libxl_ctx *ctx, uint32_t domid)
                                          NULL, NULL, NULL);
         }
     }
-    ret = xc_domain_unpause(ctx->xch, domid);
-    if (ret<0) {
-        LIBXL__LOG_ERRNO(ctx, LIBXL__LOG_ERROR, "unpausing domain %d", domid);
+
+    ret = xc_domain_unpause(CTX->xch, domid);
+    if (ret < 0) {
+        LIBXL__LOG_ERRNO(CTX, LIBXL__LOG_ERROR, "unpausing domain %d", domid);
         rc = ERROR_FAIL;
     }
  out:
+    return rc;
+}
+
+int libxl_domain_unpause(libxl_ctx *ctx, uint32_t domid)
+{
+    GC_INIT(ctx);
+    int rc = libxl__domain_unpause(gc, domid);
+
     GC_FREE;
     return rc;
 }
diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
index 71728ff..b9c93aa 100644
--- a/tools/libxl/libxl_internal.h
+++ b/tools/libxl/libxl_internal.h
@@ -1043,6 +1043,7 @@ _hidden int libxl__userdata_store(libxl__gc *gc, uint32_t domid,
 _hidden int libxl__domain_restore(libxl__gc *gc, uint32_t domid);
 _hidden int libxl__domain_resume(libxl__gc *gc, uint32_t domid,
                                  int suspend_cancel);
+_hidden int libxl__domain_unpause(libxl__gc *gc, uint32_t domid);
 
 /* returns 0 or 1, or a libxl error code */
 _hidden int libxl__domain_pvcontrol_available(libxl__gc *gc, uint32_t domid);
-- 
1.9.1