openadk/target/linux/patches/2.6.31.5/swconfig.patch

diff -Nur linux-2.6.30.orig/drivers/net/phy/Kconfig linux-2.6.30/drivers/net/phy/Kconfig
--- linux-2.6.30.orig/drivers/net/phy/Kconfig	2009-06-10 05:05:27.000000000 +0200
+++ linux-2.6.30/drivers/net/phy/Kconfig	2009-06-11 09:22:50.000000000 +0200
@@ -13,6 +13,12 @@
 
 if PHYLIB
 
+config SWCONFIG
+	tristate "Switch configuration API"
+	---help---
+	  Switch configuration API using netlink. This allows
+	  you to configure the VLAN features of certain switches.
+
 comment "MII PHY device drivers"
 
 config MARVELL_PHY
diff -Nur linux-2.6.30.orig/drivers/net/phy/Makefile linux-2.6.30/drivers/net/phy/Makefile
--- linux-2.6.30.orig/drivers/net/phy/Makefile	2009-06-10 05:05:27.000000000 +0200
+++ linux-2.6.30/drivers/net/phy/Makefile	2009-06-11 09:22:50.000000000 +0200
@@ -3,6 +3,7 @@
 libphy-objs			:= phy.o phy_device.o mdio_bus.o
 
 obj-$(CONFIG_PHYLIB)		+= libphy.o
+obj-$(CONFIG_SWCONFIG)		+= swconfig.o
 obj-$(CONFIG_MARVELL_PHY)	+= marvell.o
 obj-$(CONFIG_DAVICOM_PHY)	+= davicom.o
 obj-$(CONFIG_CICADA_PHY)	+= cicada.o
diff -Nur linux-2.6.30.orig/drivers/net/phy/swconfig.c linux-2.6.30/drivers/net/phy/swconfig.c
--- linux-2.6.30.orig/drivers/net/phy/swconfig.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.30/drivers/net/phy/swconfig.c	2009-06-11 09:22:50.000000000 +0200
@@ -0,0 +1,872 @@
+/*
+ * swconfig.c: Switch configuration API
+ *
+ * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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 <linux/types.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/if.h>
+#include <linux/if_ether.h>
+#include <linux/capability.h>
+#include <linux/skbuff.h>
+#include <linux/switch.h>
+
+//#define DEBUG 1
+#ifdef DEBUG
+#define DPRINTF(format, ...) printk("%s: " format, __func__, ##__VA_ARGS__)
+#else
+#define DPRINTF(...) do {} while(0)
+#endif
+
+MODULE_AUTHOR("Felix Fietkau <nbd@openwrt.org>");
+MODULE_LICENSE("GPL");
+
+static int swdev_id = 0;
+static struct list_head swdevs;
+static spinlock_t swdevs_lock = SPIN_LOCK_UNLOCKED;
+struct swconfig_callback;
+
+struct swconfig_callback
+{
+	struct sk_buff *msg;
+	struct genlmsghdr *hdr;
+	struct genl_info *info;
+	int cmd;
+
+	/* callback for filling in the message data */
+	int (*fill)(struct swconfig_callback *cb, void *arg);
+
+	/* callback for closing the message before sending it */
+	int (*close)(struct swconfig_callback *cb, void *arg);
+
+	struct nlattr *nest[4];
+	int args[4];
+};
+
+/* defaults */
+
+static int
+swconfig_get_vlan_ports(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val)
+{
+	int ret;
+	if (val->port_vlan >= dev->vlans)
+		return -EINVAL;
+
+	if (!dev->get_vlan_ports)
+		return -EOPNOTSUPP;
+
+	ret = dev->get_vlan_ports(dev, val);
+	printk("SET PORTS %d\n", val->len);
+	return ret;
+}
+
+static int
+swconfig_set_vlan_ports(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val)
+{
+	int i;
+
+	if (val->port_vlan >= dev->vlans)
+		return -EINVAL;
+
+	/* validate ports */
+	if (val->len > dev->ports)
+		return -EINVAL;
+
+	for (i = 0; i < val->len; i++) {
+		if (val->value.ports[i].id >= dev->ports)
+			return -EINVAL;
+	}
+
+	if (!dev->set_vlan_ports)
+		return -EOPNOTSUPP;
+
+	printk("SET PORTS %d\n", val->len);
+	return dev->set_vlan_ports(dev, val);
+}
+
+static int
+swconfig_apply_config(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val)
+{
+	/* don't complain if not supported by the switch driver */
+	if (!dev->apply_config)
+		return 0;
+
+	return dev->apply_config(dev);
+}
+
+
+enum global_defaults {
+	GLOBAL_APPLY,
+};
+
+enum vlan_defaults {
+	VLAN_PORTS,
+};
+
+enum port_defaults {
+	PORT_LINK,
+};
+
+static struct switch_attr default_global[] = {
+	[GLOBAL_APPLY] = {
+		.type = SWITCH_TYPE_NOVAL,
+		.name = "apply",
+		.description = "Activate changes in the hardware",
+		.set = swconfig_apply_config,
+	}
+};
+
+static struct switch_attr default_port[] = {
+	[PORT_LINK] = {
+		.type = SWITCH_TYPE_INT,
+		.name = "link",
+		.description = "Current link speed",
+	}
+};
+
+static struct switch_attr default_vlan[] = {
+	[VLAN_PORTS] = {
+		.type = SWITCH_TYPE_PORTS,
+		.name = "ports",
+		.description = "VLAN port mapping",
+		.set = swconfig_set_vlan_ports,
+		.get = swconfig_get_vlan_ports,
+	},
+};
+
+
+static void swconfig_defaults_init(struct switch_dev *dev)
+{
+	dev->def_global = 0;
+	dev->def_vlan = 0;
+	dev->def_port = 0;
+
+	if (dev->get_vlan_ports || dev->set_vlan_ports)
+		set_bit(VLAN_PORTS, &dev->def_vlan);
+
+	/* always present, can be no-op */
+	set_bit(GLOBAL_APPLY, &dev->def_global);
+}
+
+
+static struct genl_family switch_fam = {
+	.id = GENL_ID_GENERATE,
+	.name = "switch",
+	.hdrsize = 0,
+	.version = 1,
+	.maxattr = SWITCH_ATTR_MAX,
+};
+
+static const struct nla_policy switch_policy[SWITCH_ATTR_MAX+1] = {
+	[SWITCH_ATTR_ID] = { .type = NLA_U32 },
+	[SWITCH_ATTR_OP_ID] = { .type = NLA_U32 },
+	[SWITCH_ATTR_OP_PORT] = { .type = NLA_U32 },
+	[SWITCH_ATTR_OP_VLAN] = { .type = NLA_U32 },
+	[SWITCH_ATTR_OP_VALUE_INT] = { .type = NLA_U32 },
+	[SWITCH_ATTR_OP_VALUE_STR] = { .type = NLA_NUL_STRING },
+	[SWITCH_ATTR_OP_VALUE_PORTS] = { .type = NLA_NESTED },
+	[SWITCH_ATTR_TYPE] = { .type = NLA_U32 },
+};
+
+static const struct nla_policy port_policy[SWITCH_PORT_ATTR_MAX+1] = {
+	[SWITCH_PORT_ID] = { .type = NLA_U32 },
+	[SWITCH_PORT_FLAG_TAGGED] = { .type = NLA_FLAG },
+};
+
+static inline void
+swconfig_lock(void)
+{
+	spin_lock(&swdevs_lock);
+}
+
+static inline void
+swconfig_unlock(void)
+{
+	spin_unlock(&swdevs_lock);
+}
+
+static struct switch_dev *
+swconfig_get_dev(struct genl_info *info)
+{
+	struct switch_dev *dev = NULL;
+	struct switch_dev *p;
+	int id;
+
+	if (!info->attrs[SWITCH_ATTR_ID])
+		goto done;
+
+	id = nla_get_u32(info->attrs[SWITCH_ATTR_ID]);
+	swconfig_lock();
+	list_for_each_entry(p, &swdevs, dev_list) {
+		if (id != p->id)
+			continue;
+
+		dev = p;
+		break;
+	}
+	if (dev)
+		spin_lock(&dev->lock);
+	else
+		DPRINTF("device %d not found\n", id);
+	swconfig_unlock();
+done:
+	return dev;
+}
+
+static inline void
+swconfig_put_dev(struct switch_dev *dev)
+{
+	spin_unlock(&dev->lock);
+}
+
+static int
+swconfig_dump_attr(struct swconfig_callback *cb, void *arg)
+{
+	struct switch_attr *op = arg;
+	struct genl_info *info = cb->info;
+	struct sk_buff *msg = cb->msg;
+	int id = cb->args[0];
+	void *hdr;
+
+	hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq, &switch_fam,
+			NLM_F_MULTI, SWITCH_CMD_NEW_ATTR);
+	if (IS_ERR(hdr))
+		return -1;
+
+	NLA_PUT_U32(msg, SWITCH_ATTR_OP_ID, id);
+	NLA_PUT_U32(msg, SWITCH_ATTR_OP_TYPE, op->type);
+	NLA_PUT_STRING(msg, SWITCH_ATTR_OP_NAME, op->name);
+	if (op->description)
+		NLA_PUT_STRING(msg, SWITCH_ATTR_OP_DESCRIPTION,
+			op->description);
+
+	return genlmsg_end(msg, hdr);
+nla_put_failure:
+	genlmsg_cancel(msg, hdr);
+	return -EMSGSIZE;
+}
+
+/* spread multipart messages across multiple message buffers */
+static int
+swconfig_send_multipart(struct swconfig_callback *cb, void *arg)
+{
+	struct genl_info *info = cb->info;
+	int restart = 0;
+	int err;
+
+	do {
+		if (!cb->msg) {
+			cb->msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+			if (cb->msg == NULL)
+				goto error;
+		}
+
+		if (!(cb->fill(cb, arg) < 0))
+			break;
+
+		/* fill failed, check if this was already the second attempt */
+		if (restart)
+			goto error;
+
+		/* try again in a new message, send the current one */
+		restart = 1;
+		if (cb->close) {
+			if (cb->close(cb, arg) < 0)
+				goto error;
+		}
+		err = genlmsg_unicast(cb->msg, info->snd_pid);
+		cb->msg = NULL;
+		if (err < 0)
+			goto error;
+
+	} while (restart);
+
+	return 0;
+
+error:
+	if (cb->msg)
+		nlmsg_free(cb->msg);
+	return -1;
+}
+
+static int
+swconfig_list_attrs(struct sk_buff *skb, struct genl_info *info)
+{
+	struct genlmsghdr *hdr = nlmsg_data(info->nlhdr);
+	const struct switch_attrlist *alist;
+	struct switch_dev *dev;
+	struct swconfig_callback cb;
+	int err = -EINVAL;
+	int i;
+
+	/* defaults */
+	struct switch_attr *def_list;
+	unsigned long *def_active;
+	int n_def;
+
+	dev = swconfig_get_dev(info);
+	if (!dev)
+		return -EINVAL;
+
+	switch(hdr->cmd) {
+	case SWITCH_CMD_LIST_GLOBAL:
+		alist = &dev->attr_global;
+		def_list = default_global;
+		def_active = &dev->def_global;
+		n_def = ARRAY_SIZE(default_global);
+		break;
+	case SWITCH_CMD_LIST_VLAN:
+		alist = &dev->attr_vlan;
+		def_list = default_vlan;
+		def_active = &dev->def_vlan;
+		n_def = ARRAY_SIZE(default_vlan);
+		break;
+	case SWITCH_CMD_LIST_PORT:
+		alist = &dev->attr_port;
+		def_list = default_port;
+		def_active = &dev->def_port;
+		n_def = ARRAY_SIZE(default_port);
+		break;
+	default:
+		WARN_ON(1);
+		goto out;
+	}
+
+	memset(&cb, 0, sizeof(cb));
+	cb.info = info;
+	cb.fill = swconfig_dump_attr;
+	for (i = 0; i < alist->n_attr; i++) {
+		if (alist->attr[i].disabled)
+			continue;
+		cb.args[0] = i;
+		err = swconfig_send_multipart(&cb, &alist->attr[i]);
+		if (err < 0)
+			goto error;
+	}
+
+	/* defaults */
+	for (i = 0; i < n_def; i++) {
+		if (!test_bit(i, def_active))
+			continue;
+		cb.args[0] = SWITCH_ATTR_DEFAULTS_OFFSET + i;
+		err = swconfig_send_multipart(&cb, &def_list[i]);
+		if (err < 0)
+			goto error;
+	}
+	swconfig_put_dev(dev);
+
+	if (!cb.msg)
+		return 0;
+
+	return genlmsg_unicast(cb.msg, info->snd_pid);
+
+error:
+	if (cb.msg)
+		nlmsg_free(cb.msg);
+out:
+	swconfig_put_dev(dev);
+	return err;
+}
+
+static struct switch_attr *
+swconfig_lookup_attr(struct switch_dev *dev, struct genl_info *info,
+		struct switch_val *val)
+{
+	struct genlmsghdr *hdr = nlmsg_data(info->nlhdr);
+	const struct switch_attrlist *alist;
+	struct switch_attr *attr = NULL;
+	int attr_id;
+
+	/* defaults */
+	struct switch_attr *def_list;
+	unsigned long *def_active;
+	int n_def;
+
+	if (!info->attrs[SWITCH_ATTR_OP_ID])
+		goto done;
+
+	switch(hdr->cmd) {
+	case SWITCH_CMD_SET_GLOBAL:
+	case SWITCH_CMD_GET_GLOBAL:
+		alist = &dev->attr_global;
+		def_list = default_global;
+		def_active = &dev->def_global;
+		n_def = ARRAY_SIZE(default_global);
+		break;
+	case SWITCH_CMD_SET_VLAN:
+	case SWITCH_CMD_GET_VLAN:
+		alist = &dev->attr_vlan;
+		def_list = default_vlan;
+		def_active = &dev->def_vlan;
+		n_def = ARRAY_SIZE(default_vlan);
+		if (!info->attrs[SWITCH_ATTR_OP_VLAN])
+			goto done;
+		val->port_vlan = nla_get_u32(info->attrs[SWITCH_ATTR_OP_VLAN]);
+		break;
+	case SWITCH_CMD_SET_PORT:
+	case SWITCH_CMD_GET_PORT:
+		alist = &dev->attr_port;
+		def_list = default_port;
+		def_active = &dev->def_port;
+		n_def = ARRAY_SIZE(default_port);
+		if (!info->attrs[SWITCH_ATTR_OP_PORT])
+			goto done;
+		val->port_vlan = nla_get_u32(info->attrs[SWITCH_ATTR_OP_PORT]);
+		break;
+	default:
+		WARN_ON(1);
+		goto done;
+	}
+
+	if (!alist)
+		goto done;
+
+	attr_id = nla_get_u32(info->attrs[SWITCH_ATTR_OP_ID]);
+	if (attr_id >= SWITCH_ATTR_DEFAULTS_OFFSET) {
+		attr_id -= SWITCH_ATTR_DEFAULTS_OFFSET;
+		if (attr_id >= n_def)
+			goto done;
+		if (!test_bit(attr_id, def_active))
+			goto done;
+		attr = &def_list[attr_id];
+	} else {
+		if (attr_id >= alist->n_attr)
+			goto done;
+		attr = &alist->attr[attr_id];
+	}
+
+	if (attr->disabled)
+		attr = NULL;
+
+done:
+	if (!attr)
+		DPRINTF("attribute lookup failed\n");
+	val->attr = attr;
+	return attr;
+}
+
+static int
+swconfig_parse_ports(struct sk_buff *msg, struct nlattr *head,
+		struct switch_val *val, int max)
+{
+	struct nlattr *nla;
+	int rem;
+
+	val->len = 0;
+	nla_for_each_nested(nla, head, rem) {
+		struct nlattr *tb[SWITCH_PORT_ATTR_MAX+1];
+		struct switch_port *port = &val->value.ports[val->len];
+
+		if (val->len >= max)
+			return -EINVAL;
+
+		if (nla_parse_nested(tb, SWITCH_PORT_ATTR_MAX, nla,
+				port_policy))
+			return -EINVAL;
+
+		if (!tb[SWITCH_PORT_ID])
+			return -EINVAL;
+
+		port->id = nla_get_u32(tb[SWITCH_PORT_ID]);
+		if (tb[SWITCH_PORT_FLAG_TAGGED])
+			port->flags |= (1 << SWITCH_PORT_FLAG_TAGGED);
+		val->len++;
+	}
+
+	return 0;
+}
+
+static int
+swconfig_set_attr(struct sk_buff *skb, struct genl_info *info)
+{
+	struct switch_attr *attr;
+	struct switch_dev *dev;
+	struct switch_val val;
+	int err = -EINVAL;
+
+	dev = swconfig_get_dev(info);
+	if (!dev)
+		return -EINVAL;
+
+	memset(&val, 0, sizeof(val));
+	attr = swconfig_lookup_attr(dev, info, &val);
+	if (!attr || !attr->set)
+		goto error;
+
+	val.attr = attr;
+	switch(attr->type) {
+	case SWITCH_TYPE_NOVAL:
+		break;
+	case SWITCH_TYPE_INT:
+		if (!info->attrs[SWITCH_ATTR_OP_VALUE_INT])
+			goto error;
+		val.value.i =
+			nla_get_u32(info->attrs[SWITCH_ATTR_OP_VALUE_INT]);
+		break;
+	case SWITCH_TYPE_STRING:
+		if (!info->attrs[SWITCH_ATTR_OP_VALUE_STR])
+			goto error;
+		val.value.s =
+			nla_data(info->attrs[SWITCH_ATTR_OP_VALUE_STR]);
+		break;
+	case SWITCH_TYPE_PORTS:
+		val.value.ports = dev->portbuf;
+		memset(dev->portbuf, 0,
+			sizeof(struct switch_port) * dev->ports);
+
+		/* TODO: implement multipart? */
+		if (info->attrs[SWITCH_ATTR_OP_VALUE_PORTS]) {
+			err = swconfig_parse_ports(skb,
+				info->attrs[SWITCH_ATTR_OP_VALUE_PORTS], &val, dev->ports);
+			if (err < 0)
+				goto error;
+		} else {
+			val.len = 0;
+			err = 0;
+		}
+		break;
+	default:
+		goto error;
+	}
+
+	err = attr->set(dev, attr, &val);
+error:
+	swconfig_put_dev(dev);
+	return err;
+}
+
+static int
+swconfig_close_portlist(struct swconfig_callback *cb, void *arg)
+{
+	if (cb->nest[0])
+		nla_nest_end(cb->msg, cb->nest[0]);
+	return 0;
+}
+
+static int
+swconfig_send_port(struct swconfig_callback *cb, void *arg)
+{
+	const struct switch_port *port = arg;
+	struct nlattr *p = NULL;
+
+	if (!cb->nest[0]) {
+		cb->nest[0] = nla_nest_start(cb->msg, cb->cmd);
+		if (!cb->nest[0])
+			return -1;
+	}
+
+	p = nla_nest_start(cb->msg, SWITCH_ATTR_PORT);
+	if (!p)
+		goto error;
+
+	NLA_PUT_U32(cb->msg, SWITCH_PORT_ID, port->id);
+	if (port->flags & (1 << SWITCH_PORT_FLAG_TAGGED))
+		NLA_PUT_FLAG(cb->msg, SWITCH_PORT_FLAG_TAGGED);
+
+	nla_nest_end(cb->msg, p);
+	return 0;
+
+nla_put_failure:
+		nla_nest_cancel(cb->msg, p);
+error:
+	nla_nest_cancel(cb->msg, cb->nest[0]);
+	return -1;
+}
+
+static int
+swconfig_send_ports(struct sk_buff **msg, struct genl_info *info, int attr,
+		const struct switch_val *val)
+{
+	struct swconfig_callback cb;
+	int err = 0;
+	int i;
+
+	if (!val->value.ports)
+		return -EINVAL;
+
+	memset(&cb, 0, sizeof(cb));
+	cb.cmd = attr;
+	cb.msg = *msg;
+	cb.info = info;
+	cb.fill = swconfig_send_port;
+	cb.close = swconfig_close_portlist;
+
+	cb.nest[0] = nla_nest_start(cb.msg, cb.cmd);
+	for (i = 0; i < val->len; i++) {
+		err = swconfig_send_multipart(&cb, &val->value.ports[i]);
+		if (err)
+			goto done;
+	}
+	err = val->len;
+	swconfig_close_portlist(&cb, NULL);
+	*msg = cb.msg;
+
+done:
+	return err;
+}
+
+static int
+swconfig_get_attr(struct sk_buff *skb, struct genl_info *info)
+{
+	struct genlmsghdr *hdr = nlmsg_data(info->nlhdr);
+	struct switch_attr *attr;
+	struct switch_dev *dev;
+	struct sk_buff *msg = NULL;
+	struct switch_val val;
+	int err = -EINVAL;
+	int cmd = hdr->cmd;
+
+	dev = swconfig_get_dev(info);
+	if (!dev)
+		return -EINVAL;
+
+	memset(&val, 0, sizeof(val));
+	attr = swconfig_lookup_attr(dev, info, &val);
+	if (!attr || !attr->get)
+		goto error_dev;
+
+	if (attr->type == SWITCH_TYPE_PORTS) {
+		val.value.ports = dev->portbuf;
+		memset(dev->portbuf, 0,
+			sizeof(struct switch_port) * dev->ports);
+	}
+
+	err = attr->get(dev, attr, &val);
+	if (err)
+		goto error;
+
+	msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+	if (!msg)
+		goto error;
+
+	hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq, &switch_fam,
+			0, cmd);
+	if (IS_ERR(hdr))
+		goto nla_put_failure;
+
+	switch(attr->type) {
+	case SWITCH_TYPE_INT:
+		NLA_PUT_U32(msg, SWITCH_ATTR_OP_VALUE_INT, val.value.i);
+		break;
+	case SWITCH_TYPE_STRING:
+		NLA_PUT_STRING(msg, SWITCH_ATTR_OP_VALUE_STR, val.value.s);
+		break;
+	case SWITCH_TYPE_PORTS:
+		err = swconfig_send_ports(&msg, info,
+				SWITCH_ATTR_OP_VALUE_PORTS, &val);
+		if (err < 0)
+			goto nla_put_failure;
+		break;
+	default:
+		DPRINTF("invalid type in attribute\n");
+		err = -EINVAL;
+		goto error;
+	}
+	err = genlmsg_end(msg, hdr);
+	if (err < 0)
+		goto nla_put_failure;
+
+	swconfig_put_dev(dev);
+	return genlmsg_unicast(msg, info->snd_pid);
+
+nla_put_failure:
+	if (msg)
+		nlmsg_free(msg);
+error_dev:
+	swconfig_put_dev(dev);
+error:
+	if (!err)
+		err = -ENOMEM;
+	return err;
+}
+
+static int
+swconfig_send_switch(struct sk_buff *msg, u32 pid, u32 seq, int flags,
+		const struct switch_dev *dev)
+{
+	void *hdr;
+
+	hdr = genlmsg_put(msg, pid, seq, &switch_fam, flags,
+			SWITCH_CMD_NEW_ATTR);
+	if (IS_ERR(hdr))
+		return -1;
+
+	NLA_PUT_U32(msg, SWITCH_ATTR_ID, dev->id);
+	NLA_PUT_STRING(msg, SWITCH_ATTR_NAME, dev->name);
+	NLA_PUT_STRING(msg, SWITCH_ATTR_DEV_NAME, dev->devname);
+	NLA_PUT_U32(msg, SWITCH_ATTR_VLANS, dev->vlans);
+	NLA_PUT_U32(msg, SWITCH_ATTR_PORTS, dev->ports);
+
+	return genlmsg_end(msg, hdr);
+nla_put_failure:
+	genlmsg_cancel(msg, hdr);
+	return -EMSGSIZE;
+}
+
+static int swconfig_dump_switches(struct sk_buff *skb,
+		struct netlink_callback *cb)
+{
+	struct switch_dev *dev;
+	int start = cb->args[0];
+	int idx = 0;
+
+	swconfig_lock();
+	list_for_each_entry(dev, &swdevs, dev_list) {
+		if (++idx <= start)
+			continue;
+		if (swconfig_send_switch(skb, NETLINK_CB(cb->skb).pid,
+				cb->nlh->nlmsg_seq, NLM_F_MULTI,
+				dev) < 0)
+			break;
+	}
+	swconfig_unlock();
+	cb->args[0] = idx;
+
+	return skb->len;
+}
+
+static int
+swconfig_done(struct netlink_callback *cb)
+{
+	return 0;
+}
+
+static struct genl_ops swconfig_ops[] = {
+	{
+		.cmd = SWITCH_CMD_LIST_GLOBAL,
+		.doit = swconfig_list_attrs,
+		.policy = switch_policy,
+	},
+	{
+		.cmd = SWITCH_CMD_LIST_VLAN,
+		.doit = swconfig_list_attrs,
+		.policy = switch_policy,
+	},
+	{
+		.cmd = SWITCH_CMD_LIST_PORT,
+		.doit = swconfig_list_attrs,
+		.policy = switch_policy,
+	},
+	{
+		.cmd = SWITCH_CMD_GET_GLOBAL,
+		.doit = swconfig_get_attr,
+		.policy = switch_policy,
+	},
+	{
+		.cmd = SWITCH_CMD_GET_VLAN,
+		.doit = swconfig_get_attr,
+		.policy = switch_policy,
+	},
+	{
+		.cmd = SWITCH_CMD_GET_PORT,
+		.doit = swconfig_get_attr,
+		.policy = switch_policy,
+	},
+	{
+		.cmd = SWITCH_CMD_SET_GLOBAL,
+		.doit = swconfig_set_attr,
+		.policy = switch_policy,
+	},
+	{
+		.cmd = SWITCH_CMD_SET_VLAN,
+		.doit = swconfig_set_attr,
+		.policy = switch_policy,
+	},
+	{
+		.cmd = SWITCH_CMD_SET_PORT,
+		.doit = swconfig_set_attr,
+		.policy = switch_policy,
+	},
+	{
+		.cmd = SWITCH_CMD_GET_SWITCH,
+		.dumpit = swconfig_dump_switches,
+		.policy = switch_policy,
+		.done = swconfig_done,
+	}
+};
+
+int
+register_switch(struct switch_dev *dev, struct net_device *netdev)
+{
+	INIT_LIST_HEAD(&dev->dev_list);
+	if (netdev) {
+		dev->netdev = netdev;
+		if (!dev->devname)
+			dev->devname = netdev->name;
+	}
+	BUG_ON(!dev->devname);
+
+	if (dev->ports > 0) {
+		dev->portbuf = kzalloc(sizeof(struct switch_port) * dev->ports,
+				GFP_KERNEL);
+		if (!dev->portbuf)
+			return -ENOMEM;
+	}
+	dev->id = ++swdev_id;
+	swconfig_defaults_init(dev);
+	spin_lock_init(&dev->lock);
+	swconfig_lock();
+	list_add(&dev->dev_list, &swdevs);
+	swconfig_unlock();
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(register_switch);
+
+void
+unregister_switch(struct switch_dev *dev)
+{
+	kfree(dev->portbuf);
+	spin_lock(&dev->lock);
+	swconfig_lock();
+	list_del(&dev->dev_list);
+	swconfig_unlock();
+}
+EXPORT_SYMBOL_GPL(unregister_switch);
+
+
+static int __init
+swconfig_init(void)
+{
+	int i, err;
+
+	INIT_LIST_HEAD(&swdevs);
+	err = genl_register_family(&switch_fam);
+	if (err)
+		return err;
+
+	for (i = 0; i < ARRAY_SIZE(swconfig_ops); i++) {
+		err = genl_register_ops(&switch_fam, &swconfig_ops[i]);
+		if (err)
+			goto unregister;
+	}
+
+	return 0;
+
+unregister:
+	genl_unregister_family(&switch_fam);
+	return err;
+}
+
+static void __exit
+swconfig_exit(void)
+{
+	genl_unregister_family(&switch_fam);
+}
+
+module_init(swconfig_init);
+module_exit(swconfig_exit);
+
diff -Nur linux-2.6.30.orig/include/linux/switch.h linux-2.6.30/include/linux/switch.h
--- linux-2.6.30.orig/include/linux/switch.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.30/include/linux/switch.h	2009-06-11 09:22:50.000000000 +0200
@@ -0,0 +1,168 @@
+/*
+ * switch.h: Switch configuration API
+ *
+ * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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.
+ */
+
+#ifndef __LINUX_SWITCH_H
+#define __LINUX_SWITCH_H
+
+#include <linux/types.h>
+#include <linux/netdevice.h>
+#include <linux/netlink.h>
+#include <linux/genetlink.h>
+#ifndef __KERNEL__
+#include <netlink/netlink.h>
+#include <netlink/genl/genl.h>
+#include <netlink/genl/ctrl.h>
+#else
+#include <net/genetlink.h>
+#endif
+
+/* main attributes */
+enum {
+	SWITCH_ATTR_UNSPEC,
+	/* global */
+	SWITCH_ATTR_TYPE,
+	/* device */
+	SWITCH_ATTR_ID,
+	SWITCH_ATTR_NAME,
+	SWITCH_ATTR_DEV_NAME,
+	SWITCH_ATTR_VLANS,
+	SWITCH_ATTR_PORTS,
+	/* attributes */
+	SWITCH_ATTR_OP_ID,
+	SWITCH_ATTR_OP_TYPE,
+	SWITCH_ATTR_OP_NAME,
+	SWITCH_ATTR_OP_PORT,
+	SWITCH_ATTR_OP_VLAN,
+	SWITCH_ATTR_OP_VALUE_INT,
+	SWITCH_ATTR_OP_VALUE_STR,
+	SWITCH_ATTR_OP_VALUE_PORTS,
+	SWITCH_ATTR_OP_DESCRIPTION,
+	/* port lists */
+	SWITCH_ATTR_PORT,
+	SWITCH_ATTR_MAX
+};
+
+/* commands */
+enum {
+	SWITCH_CMD_UNSPEC,
+	SWITCH_CMD_GET_SWITCH,
+	SWITCH_CMD_NEW_ATTR,
+	SWITCH_CMD_LIST_GLOBAL,
+	SWITCH_CMD_GET_GLOBAL,
+	SWITCH_CMD_SET_GLOBAL,
+	SWITCH_CMD_LIST_PORT,
+	SWITCH_CMD_GET_PORT,
+	SWITCH_CMD_SET_PORT,
+	SWITCH_CMD_LIST_VLAN,
+	SWITCH_CMD_GET_VLAN,
+	SWITCH_CMD_SET_VLAN
+};
+
+/* data types */
+enum switch_val_type {
+	SWITCH_TYPE_UNSPEC,
+	SWITCH_TYPE_INT,
+	SWITCH_TYPE_STRING,
+	SWITCH_TYPE_PORTS,
+	SWITCH_TYPE_NOVAL,
+};
+
+/* port nested attributes */
+enum {
+	SWITCH_PORT_UNSPEC,
+	SWITCH_PORT_ID,
+	SWITCH_PORT_FLAG_TAGGED,
+	SWITCH_PORT_ATTR_MAX
+};
+
+#define SWITCH_ATTR_DEFAULTS_OFFSET	0x1000
+
+#ifdef __KERNEL__
+
+struct switch_dev;
+struct switch_op;
+struct switch_val;
+struct switch_attr;
+struct switch_attrlist;
+
+int register_switch(struct switch_dev *dev, struct net_device *netdev);
+void unregister_switch(struct switch_dev *dev);
+
+struct switch_attrlist {
+	/* filled in by the driver */
+	int n_attr;
+	struct switch_attr *attr;
+};
+
+
+struct switch_dev {
+	int id;
+	void *priv;
+	const char *name;
+
+	/* NB: either devname or netdev must be set */
+	const char *devname;
+	struct net_device *netdev;
+
+	int ports;
+	int vlans;
+	int cpu_port;
+	struct switch_attrlist attr_global, attr_port, attr_vlan;
+
+	spinlock_t lock;
+	struct switch_port *portbuf;
+	struct list_head dev_list;
+	unsigned long def_global, def_port, def_vlan;
+
+	int (*get_vlan_ports)(struct switch_dev *dev, struct switch_val *val);
+	int (*set_vlan_ports)(struct switch_dev *dev, struct switch_val *val);
+	int (*apply_config)(struct switch_dev *dev);
+};
+
+struct switch_port {
+	u32 id;
+	u32 flags;
+};
+
+struct switch_val {
+	struct switch_attr *attr;
+	int port_vlan;
+	int len;
+	union {
+		const char *s;
+		u32 i;
+		struct switch_port *ports;
+	} value;
+};
+
+struct switch_attr {
+	int disabled;
+	int type;
+	const char *name;
+	const char *description;
+
+	int (*set)(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val);
+	int (*get)(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val);
+
+	/* for driver internal use */
+	int id;
+	int ofs;
+	int max;
+};
+
+#endif
+
+#endif