[v10,14/31] tools/libx{l, c}: introduce wait_checkpoint callback

Commit Message

Wen Congyang Feb. 22, 2016, 2:52 a.m. UTC

Under COLO, we are doing checkpoint on demand, if this
callback returns 1, we will take another checkpoint.
0 indicates unexpected error.

Signed-off-by: Yang Hongyang <[e-mail]>
Signed-off-by: Wen Congyang <[e-mail]>
---
 tools/libxc/include/xenguest.h     | 18 ++++++++++++++++++
 tools/libxl/libxl_save_msgs_gen.pl |  7 ++++---
 2 files changed, 22 insertions(+), 3 deletions(-)

Patch

diff --git a/tools/libxc/include/xenguest.h b/tools/libxc/include/xenguest.h
index 8040ac7..f598bec 100644
--- a/tools/libxc/include/xenguest.h
+++ b/tools/libxc/include/xenguest.h
@@ -68,6 +68,15 @@  struct save_callbacks {
      * 1: take another checkpoint */
     int (*checkpoint)(void* data);
 
+    /*
+     * Called after the checkpoint callback.
+     *
+     * returns:
+     * 0: terminate checkpointing gracefully
+     * 1: take another checkpoint
+     */
+    int (*wait_checkpoint)(void* data);
+
     /* Enable qemu-dm logging dirty pages to xen */
     int (*switch_qemu_logdirty)(int domid, unsigned enable, void *data); /* HVM only */
 
@@ -99,6 +108,15 @@  struct restore_callbacks {
 #define XGR_CHECKPOINT_FAILOVER 2 /* Failover and resume VM */
     int (*checkpoint)(void* data);
 
+    /*
+     * Called after the checkpoint callback.
+     *
+     * returns:
+     * 0: terminate checkpointing gracefully
+     * 1: take another checkpoint
+     */
+    int (*wait_checkpoint)(void* data);
+
     /* to be provided as the last argument to each callback function */
     void* data;
 };
diff --git a/tools/libxl/libxl_save_msgs_gen.pl b/tools/libxl/libxl_save_msgs_gen.pl
index d6d2967..51d004d 100755
--- a/tools/libxl/libxl_save_msgs_gen.pl
+++ b/tools/libxl/libxl_save_msgs_gen.pl
@@ -26,11 +26,12 @@  our @msgs = (
     [  3, 'scxA',   "suspend", [] ],
     [  4, 'scxA',   "postcopy", [] ],
     [  5, 'srcxA',  "checkpoint", [] ],
-    [  6, 'scxA',   "switch_qemu_logdirty",  [qw(int domid
+    [  6, 'srcxA',  "wait_checkpoint", [] ],
+    [  7, 'scxA',   "switch_qemu_logdirty",  [qw(int domid
                                               unsigned enable)] ],
-    [  7, 'r',      "restore_results",       ['unsigned long', 'store_mfn',
+    [  8, 'r',      "restore_results",       ['unsigned long', 'store_mfn',
                                               'unsigned long', 'console_mfn'] ],
-    [  8, 'srW',    "complete",              [qw(int retval
+    [  9, 'srW',    "complete",              [qw(int retval
                                                  int errnoval)] ],
 );