datapath: Backport genl_register_family_with_ops().

[sliver-openvswitch.git] / datapath / linux-2.6 / compat-2.6 / genetlink.inc

diff --git a/datapath/linux-2.6/compat-2.6/genetlink.inc b/datapath/linux-2.6/compat-2.6/genetlink.inc
index e6ebe2f..63760bb 100644 (file)
--- a/datapath/linux-2.6/compat-2.6/genetlink.inc
+++ b/datapath/linux-2.6/compat-2.6/genetlink.inc
@@ -24,3 +24,50 @@ int genl_register_mc_group(struct genl_family *family,
        return 0;
 }
 #endif /* kernel < 2.6.23 */
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,31)
+/**
+ * genl_register_family_with_ops - register a generic netlink family
+ * @family: generic netlink family
+ * @ops: operations to be registered
+ * @n_ops: number of elements to register
+ *
+ * Registers the specified family and operations from the specified table.
+ * Only one family may be registered with the same family name or identifier.
+ *
+ * The family id may equal GENL_ID_GENERATE causing an unique id to
+ * be automatically generated and assigned.
+ *
+ * Either a doit or dumpit callback must be specified for every registered
+ * operation or the function will fail. Only one operation structure per
+ * command identifier may be registered.
+ *
+ * See include/net/genetlink.h for more documenation on the operations
+ * structure.
+ *
+ * This is equivalent to calling genl_register_family() followed by
+ * genl_register_ops() for every operation entry in the table taking
+ * care to unregister the family on error path.
+ *
+ * Return 0 on success or a negative error code.
+ */
+int genl_register_family_with_ops(struct genl_family *family,
+       struct genl_ops *ops, size_t n_ops)
+{
+       int err, i;
+
+       err = genl_register_family(family);
+       if (err)
+               return err;
+
+       for (i = 0; i < n_ops; ++i, ++ops) {
+               err = genl_register_ops(family, ops);
+               if (err)
+                       goto err_out;
+       }
+       return 0;
+err_out:
+       genl_unregister_family(family);
+       return err;
+}
+#endif