[RFC,v4,18/20] batctl: Support generic netlink for multicast_mode command

Message ID 20181207203209.22633-19-sven@narfation.org (mailing list archive)
State RFC, archived
Delegated to: Simon Wunderlich
Headers
Series batctl: netlink restructuring, part 3 |

Commit Message

Sven Eckelmann Dec. 7, 2018, 8:32 p.m. UTC
  sysfs should be avoided for new settings of network interfaces. To still
provide a common configuration infrastructure, all the existing settings
subcommands also have to be reimplemented via generic netlink while still
using sysfs as fallback.

The multicast_mode implementation is using the commands
BATADV_CMD_SET_MESH/BATADV_CMD_GET_MESH to set/get the configuration of
the u8 (boolean) BATADV_ATTR_MULTICAST_MODE attribute.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
---
Cc: Linus Lüssing <linus.luessing@c0d3.blue>
---
 multicast_mode.c | 45 +++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 43 insertions(+), 2 deletions(-)
  

Patch

diff --git a/multicast_mode.c b/multicast_mode.c
index 8542928..381b8a6 100644
--- a/multicast_mode.c
+++ b/multicast_mode.c
@@ -21,13 +21,54 @@ 
  */
 
 #include "main.h"
+
+#include <errno.h>
+#include <linux/genetlink.h>
+#include <netlink/genl/genl.h>
+
+#include "batman_adv.h"
+#include "netlink.h"
 #include "sys.h"
 
+static struct simple_boolean_data multicast_mode;
+
+static int print_multicast_mode(struct nl_msg *msg, void *arg)
+{
+	return sys_simple_print_boolean(msg, arg, BATADV_ATTR_MULTICAST_MODE);
+}
+
+static int get_multicast_mode(struct state *state)
+{
+	return sys_simple_nlquery(state, BATADV_CMD_GET_MESH,
+				  NULL, print_multicast_mode);
+}
+
+static int set_attrs_multicast_mode(struct nl_msg *msg, void *arg)
+{
+	struct state *state = arg;
+	struct settings_data *settings = state->cmd->arg;
+	struct simple_boolean_data *data = settings->data;
+
+	nla_put_u8(msg, BATADV_ATTR_MULTICAST_MODE, data->val);
+
+	return 0;
+}
+
+static int set_multicast_mode(struct state *state)
+{
+	return sys_simple_nlquery(state, BATADV_CMD_SET_MESH,
+				  set_attrs_multicast_mode, NULL);
+}
+
 static struct settings_data batctl_settings_multicast_mode = {
 	.sysfs_name = SYS_MULTICAST_MODE,
-	.params = sysfs_param_enable,
+	.data = &multicast_mode,
+	.parse = parse_simple_boolean,
+	.netlink_get = get_multicast_mode,
+	.netlink_set = set_multicast_mode,
 };
 
 COMMAND_NAMED(SUBCOMMAND, multicast_mode, "mm", handle_sys_setting,
-	      COMMAND_FLAG_MESH_IFACE, &batctl_settings_multicast_mode,
+	      COMMAND_FLAG_MESH_IFACE | COMMAND_FLAG_NETLINK,
+	      &batctl_settings_multicast_mode,
 	      "[0|1]             \tdisplay or modify multicast_mode setting");