Import from old repository commit 61ef2b42a9c4ba8e1600f15bb0236765edc2ad45.v0.90.0

1 files changed, 22 insertions, 0 deletions

diff --git a/datapath/linux-2.6/compat-2.6/genetlink-openvswitch.c b/datapath/linux-2.6/compat-2.6/genetlink-openvswitch.c
new file mode 100644
index 00000000..9e09215f
--- /dev/null
+++ b/datapath/linux-2.6/compat-2.6/genetlink-openvswitch.c
@@ -0,0 +1,22 @@
+#include "net/genetlink.h"
+
+#include <linux/version.h>
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)
+
+/* We use multicast groups 16 through 31 to avoid colliding with the multicast
+ * group selected by brcompat_mod, which uses groups 32.  Collision isn't
+ * fatal--multicast listeners should check that the family is the one that they
+ * want and discard others--but it wastes time and memory to receive unwanted
+ * messages. */
+int genl_register_mc_group(struct genl_family *family,
+			   struct genl_multicast_group *grp)
+{
+	/* This code is called single-threaded. */
+	static unsigned int next_id = 0;
+	grp->id = next_id++ % 16 + 16;
+	grp->family = family;
+
+	return 0;
+}
+
+#endif /* kernel < 2.6.23 */