bitkeeper revision 1.1527.2.1 (429368a2F0SR4yrzuHsrRucuwriYqA)

Implement the parts of vm save which need interaction with xend
as part of xend, instead of using xfrd.
Execute xc_linux_save in a seperate process so that it can't
crash xend.  Also handle errors passed from xc_linux_save.
xen_domain.c:
  Disable save in xfrd.
xc_save.c:
  new file
Makefile:
  Add xc_save.
XendDomainInfo.py:
  Add suspended state and threading Condition with notification, allowing
  easy waiting for state changes.
XendDomain.py:
  Implement the parts of vm save which need interaction with xend
  as part of xend, instead of using xfrd.  Set state to "suspended"
  when detecting a suspended domain.
  Fix reading output from subprocesses.
  Fix ValueError in xen_domain().
xc.c:
  Remove python binding for xc_linux_save.
xc_linux_save.c:
  Implement the parts of vm save which need interaction with xend
  as part of xend, instead of using xfrd.  Also run xc_linux_save
  in a seperate process.
xc_linux_restore.c:
  Flush output so that xend picks it up timely.
  Also disable debug output again.
xc.h:
  Update xc_linux_save prototype and fix comments for xc_linux_{save,restore}.
ignore:
  Add tools/xcutils/xc_save.
xpopen.py:
  Exit with 127 if exec fails.
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>

2 files changed, 31 insertions, 1 deletions

diff --git a/tools/xcutils/Makefile b/tools/xcutils/Makefile
index 71c3c6a404..613358df8b 100644
--- a/tools/xcutils/Makefile
+++ b/tools/xcutils/Makefile
@@ -28,9 +28,10 @@ CFLAGS += $(INCLUDES)
 CFLAGS += -Wp,-MD,.$(@F).d
 PROG_DEP = .*.d
 
-PROGRAMS		= xc_restore
+PROGRAMS		= xc_restore xc_save
 
 xc_restore_OBJS		= xc_restore.o
+xc_save_OBJS		= xc_save.o
 
 LDLIBS			= -L$(XEN_LIBXC) -L$(XEN_LIBXUTIL) -lxc -lxutil
 
diff --git a/tools/xcutils/xc_save.c b/tools/xcutils/xc_save.c
new file mode 100644
index 0000000000..6ca1d5cc6c
--- /dev/null
+++ b/tools/xcutils/xc_save.c
@@ -0,0 +1,29 @@
+/* 
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License.  See the file "COPYING" in the main directory of
+ * this archive for more details.
+ *
+ * Copyright (C) 2005 by Christian Limpach
+ *
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <err.h>
+
+#include <xc.h>
+
+int
+main(int argc, char **argv)
+{
+    unsigned int xc_fd, io_fd, domid;
+
+    if (argc != 4)
+	errx(1, "usage: %s xcfd iofd domid", argv[0]);
+
+    xc_fd = atoi(argv[1]);
+    io_fd = atoi(argv[2]);
+    domid = atoi(argv[3]);
+
+    return xc_linux_save(xc_fd, io_fd, domid);
+}