c/r: move criu code to its own file

src/lxc/Makefile.am

@@ -21,7 +21,8 @@ noinst_HEADERS = \
 	namespace.h \
 	start.h \
 	state.h \
-	utils.h
+	utils.h \
+	criu.h
 
 if IS_BIONIC
 noinst_HEADERS += \
@@ -75,6 +76,7 @@ liblxc_so_SOURCES = \
 	state.c state.h \
 	log.c log.h \
 	attach.c attach.h \
+	criu.c criu.h \
 	\
 	network.c network.h \
 	nl.c nl.h \

src/lxc/criu.h

+/*
+ * lxc: linux Container library
+ *
+ * Copyright © 2014-2015 Canonical Ltd.
+ *
+ * Authors:
+ * Tycho Andersen <tycho.andersen@canonical.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#ifndef __LXC_CRIU_H
+#define __LXC_CRIU_H
+
+#include <stdbool.h>
+
+#include <lxc/lxccontainer.h>
+
+// We require either the criu major/minor version, or the criu GITID if criu
+// was built from git.
+#define CRIU_VERSION 		"1.6"
+
+#define CRIU_GITID_VERSION	"1.5"
+#define CRIU_GITID_PATCHLEVEL	133
+
+struct criu_opts {
+	/* The type of criu invocation, one of "dump" or "restore" */
+	char *action;
+
+	/* The directory to pass to criu */
+	char *directory;
+
+	/* The container to dump */
+	struct lxc_container *c;
+
+	/* Enable criu verbose mode? */
+	bool verbose;
+
+	/* dump: stop the container or not after dumping? */
+	bool stop;
+
+	/* restore: the file to write the init process' pid into */
+	char *pidfile;
+	const char *cgroup_path;
+};
+
+void exec_criu(struct criu_opts *opts);
+
+/* Check and make sure the container has a configuration that we know CRIU can
+ * dump. */
+bool criu_ok(struct lxc_container *c);
+
+bool dump_net_info(struct lxc_container *c, char *directory);
+
+// do_restore never returns, the calling process is used as the
+// monitor process. do_restore calls exit() if it fails.
+void do_restore(struct lxc_container *c, int pipe, char *directory, bool verbose);
+
+#endif