device: add macvlan support

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>

1 files changed, 254 insertions, 0 deletions

diff --git a/macvlan.c b/macvlan.c
new file mode 100644
index 0000000..bf81340
--- /dev/null
+++ b/macvlan.c
@@ -0,0 +1,254 @@
+/*
+ * netifd - network interface daemon
+ * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation
+ *
+ * This program 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 General Public License for more details.
+ */
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <assert.h>
+#include <errno.h>
+#include <netinet/ether.h>
+
+#include "netifd.h"
+#include "device.h"
+#include "interface.h"
+#include "system.h"
+
+enum {
+	MACVLAN_ATTR_IFNAME,
+	MACVLAN_ATTR_MACADDR,
+	MACVLAN_ATTR_MODE,
+	__MACVLAN_ATTR_MAX
+};
+
+static const struct blobmsg_policy macvlan_attrs[__MACVLAN_ATTR_MAX] = {
+	[MACVLAN_ATTR_IFNAME]  = { "ifname", BLOBMSG_TYPE_STRING },
+	[MACVLAN_ATTR_MACADDR] = { "macaddr", BLOBMSG_TYPE_STRING },
+	[MACVLAN_ATTR_MODE] = { "mode", BLOBMSG_TYPE_STRING },
+};
+
+static const struct uci_blob_param_list macvlan_attr_list = {
+	.n_params = __MACVLAN_ATTR_MAX,
+	.params = macvlan_attrs,
+};
+
+struct macvlan_device {
+	struct device dev;
+	struct device_user parent;
+
+	device_state_cb set_state;
+
+	struct blob_attr *config_data;
+	struct blob_attr *ifname;
+	struct macvlan_config config;
+};
+
+static void
+macvlan_base_cb(struct device_user *dev, enum device_event ev)
+{
+	struct macvlan_device *mvdev = container_of(dev, struct macvlan_device, parent);
+
+	switch (ev) {
+	case DEV_EVENT_ADD:
+		device_set_present(&mvdev->dev, true);
+		break;
+	case DEV_EVENT_REMOVE:
+		device_set_present(&mvdev->dev, false);
+		break;
+	default:
+		return;
+	}
+}
+
+static int
+macvlan_set_down(struct macvlan_device *mvdev)
+{
+	mvdev->set_state(&mvdev->dev, false);
+	system_macvlan_del(&mvdev->dev);
+	device_release(&mvdev->parent);
+
+	return 0;
+}
+
+static int
+macvlan_set_up(struct macvlan_device *mvdev)
+{
+	int ret;
+
+	ret = device_claim(&mvdev->parent);
+	if (ret < 0)
+		return ret;
+
+	ret = system_macvlan_add(&mvdev->dev, mvdev->parent.dev, &mvdev->config);
+	if (ret < 0)
+		goto release;
+
+	ret = mvdev->set_state(&mvdev->dev, true);
+	if (ret)
+		goto delete;
+
+	return 0;
+
+delete:
+	system_macvlan_del(&mvdev->dev);
+release:
+	device_release(&mvdev->parent);
+	return ret;
+}
+
+static int
+macvlan_set_state(struct device *dev, bool up)
+{
+	struct macvlan_device *mvdev;
+
+	D(SYSTEM, "macvlan_set_state(%s, %u)\n", dev->ifname, up);
+
+	mvdev = container_of(dev, struct macvlan_device, dev);
+	if (up)
+		return macvlan_set_up(mvdev);
+	else
+		return macvlan_set_down(mvdev);
+}
+
+static void
+macvlan_free(struct device *dev)
+{
+	struct macvlan_device *mvdev;
+
+	mvdev = container_of(dev, struct macvlan_device, dev);
+	device_remove_user(&mvdev->parent);
+	free(mvdev);
+}
+
+static void
+macvlan_dump_info(struct device *dev, struct blob_buf *b)
+{
+	struct macvlan_device *mvdev;
+
+	mvdev = container_of(dev, struct macvlan_device, dev);
+	blobmsg_add_string(b, "parent", mvdev->parent.dev->ifname);
+	system_if_dump_info(dev, b);
+}
+
+static void
+macvlan_config_init(struct device *dev)
+{
+	struct macvlan_device *mvdev;
+	struct device *basedev = NULL;
+
+	mvdev = container_of(dev, struct macvlan_device, dev);
+	if (mvdev->ifname)
+		basedev = device_get(blobmsg_data(mvdev->ifname), true);
+
+	device_add_user(&mvdev->parent, basedev);
+}
+
+static void
+macvlan_apply_settings(struct macvlan_device *mvdev, struct blob_attr **tb)
+{
+	struct macvlan_config *cfg = &mvdev->config;
+	struct blob_attr *cur;
+	struct ether_addr *ea;
+
+	cfg->flags = 0;
+	cfg->mode = NULL;
+
+	if ((cur = tb[MACVLAN_ATTR_MACADDR])) {
+		ea = ether_aton(blobmsg_data(cur));
+		if (ea) {
+			memcpy(cfg->macaddr, ea, 6);
+			cfg->flags |= MACVLAN_OPT_MACADDR;
+		}
+	}
+
+	if ((cur = tb[MACVLAN_ATTR_MODE]))
+		cfg->mode = blobmsg_data(cur);
+}
+
+static enum dev_change_type
+macvlan_reload(struct device *dev, struct blob_attr *attr)
+{
+	struct blob_attr *tb_dev[__DEV_ATTR_MAX];
+	struct blob_attr *tb_mv[__MACVLAN_ATTR_MAX];
+	enum dev_change_type ret = DEV_CONFIG_APPLIED;
+	struct macvlan_device *mvdev;
+
+	mvdev = container_of(dev, struct macvlan_device, dev);
+
+	blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, tb_dev,
+		blob_data(attr), blob_len(attr));
+	blobmsg_parse(macvlan_attrs, __MACVLAN_ATTR_MAX, tb_mv,
+		blob_data(attr), blob_len(attr));
+
+	device_init_settings(dev, tb_dev);
+	macvlan_apply_settings(mvdev, tb_mv);
+	mvdev->ifname = tb_mv[MACVLAN_ATTR_IFNAME];
+
+	if (mvdev->config_data) {
+		struct blob_attr *otb_dev[__DEV_ATTR_MAX];
+		struct blob_attr *otb_mv[__MACVLAN_ATTR_MAX];
+
+		blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, otb_dev,
+			blob_data(mvdev->config_data), blob_len(mvdev->config_data));
+
+		if (uci_blob_diff(tb_dev, otb_dev, &device_attr_list, NULL))
+		    ret = DEV_CONFIG_RESTART;
+
+		blobmsg_parse(macvlan_attrs, __MACVLAN_ATTR_MAX, otb_mv,
+			blob_data(mvdev->config_data), blob_len(mvdev->config_data));
+
+		if (uci_blob_diff(tb_mv, otb_mv, &macvlan_attr_list, NULL))
+		    ret = DEV_CONFIG_RESTART;
+
+		macvlan_config_init(dev);
+	}
+
+	mvdev->config_data = attr;
+	return ret;
+}
+
+static struct device *
+macvlan_create(const char *name, struct blob_attr *attr)
+{
+	struct macvlan_device *mvdev;
+	struct device *dev = NULL;
+
+	mvdev = calloc(1, sizeof(*mvdev));
+	if (!mvdev)
+		return NULL;
+
+	dev = &mvdev->dev;
+	device_init(dev, &macvlan_device_type, name);
+	dev->config_pending = true;
+
+	mvdev->set_state = dev->set_state;
+	dev->set_state = macvlan_set_state;
+
+	dev->hotplug_ops = NULL;
+	mvdev->parent.cb = macvlan_base_cb;
+
+	macvlan_reload(dev, attr);
+
+	return dev;
+}
+
+const struct device_type macvlan_device_type = {
+	.name = "MAC VLAN",
+	.config_params = &macvlan_attr_list,
+
+	.create = macvlan_create,
+	.config_init = macvlan_config_init,
+	.reload = macvlan_reload,
+	.free = macvlan_free,
+	.dump_info = macvlan_dump_info,
+};