net: Routes dump and restore

Same here -- run ip tool and that's it.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

image.c

@@ -120,6 +120,7 @@ struct cr_fd_desc_tmpl fdset_template[CR_FD_MAX] = {
 	FD_ENTRY(MOUNTPOINTS,	"mountpoints-%d", show_mountpoints),
 	FD_ENTRY(NETDEV,	"netdev-%d",	 show_netdevices),
 	FD_ENTRY(IFADDR,	"ifaddr-%d",	 show_ifaddrs),
+	FD_ENTRY(ROUTE,		"route-%d",	 show_routes),
 };
 
 static struct cr_fdset *alloc_cr_fdset(int nr)

include/crtools.h

@@ -48,6 +48,7 @@ enum {
 	CR_FD_MOUNTPOINTS,
 	CR_FD_NETDEV,
 	CR_FD_IFADDR,
+	CR_FD_ROUTE,
 	_CR_FD_NS_TO,
 
 	CR_FD_PSTREE,

include/image.h

@@ -59,6 +59,7 @@
 #define NETDEV_MAGIC		0x57373951 /* Yaroslavl */
 
 #define IFADDR_MAGIC		RAW_IMAGE_MAGIC
+#define ROUTE_MAGIC		RAW_IMAGE_MAGIC
 
 #define PAGE_IMAGE_SIZE	4096
 #define PAGE_RSS	1

include/net.h

@@ -3,6 +3,7 @@
 struct cr_options;
 void show_netdevices(int fd, struct cr_options *);
 void show_ifaddrs(int fd, struct cr_options *);
+void show_routes(int fd, struct cr_options *);
 
 struct cr_fdset;
 int dump_net_ns(int pid, struct cr_fdset *);

net.c

@@ -232,6 +232,11 @@ static inline int dump_ifaddr(struct cr_fdset *fds)
 	return run_ip_tool("addr", "save", -1, fdset_fd(fds, CR_FD_IFADDR));
 }
 
+static inline int dump_route(struct cr_fdset *fds)
+{
+	return run_ip_tool("route", "save", -1, fdset_fd(fds, CR_FD_ROUTE));
+}
+
 static int restore_ip_dump(int type, int pid, char *cmd)
 {
 	int fd, ret;
@@ -250,11 +255,20 @@ static inline int restore_ifaddr(int pid)
 	return restore_ip_dump(CR_FD_IFADDR, pid, "addr");
 }
 
+static inline int restore_route(int pid)
+{
+	return restore_ip_dump(CR_FD_ROUTE, pid, "route");
+}
+
 void show_ifaddrs(int fd, struct cr_options *o)
 {
 	BUG_ON(1);
 }
 
+void show_routes(int fd, struct cr_options *o)
+{
+	BUG_ON(1);
+}
 
 int dump_net_ns(int pid, struct cr_fdset *fds)
 {
@@ -265,6 +279,8 @@ int dump_net_ns(int pid, struct cr_fdset *fds)
 		ret = dump_links(fds);
 	if (!ret)
 		ret = dump_ifaddr(fds);
+	if (!ret)
+		ret = dump_route(fds);
 
 	return ret;
 }
@@ -276,6 +292,8 @@ int prepare_net_ns(int pid)
 	ret = restore_links(pid);
 	if (!ret)
 		ret = restore_ifaddr(pid);
+	if (!ret)
+		ret = restore_route(pid);
 
 	return ret;
 }