add new switch configuration api

SVN-Revision: 13009

package/swconfig/Makefile

@@ -0,0 +1,47 @@
+# 
+# Copyright (C) 2006 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+# $Id$
+
+include $(TOPDIR)/rules.mk
+include $(INCLUDE_DIR)/kernel.mk
+
+PKG_NAME:=kmod-swconfig
+PKG_RELEASE:=1
+PKG_BUILD_DEPENDS:=libnl
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/swconfig
+  SECTION:=base
+  CATEGORY:=Base system
+  DEPENDS:=@LINUX_2_6_26||LINUX_2_6_27
+  TITLE:=Switch configuration utility
+endef
+
+TARGET_CPPFLAGS += \
+	-I$(STAGING_DIR)/usr/include \
+	-I$(LINUX_DIR)/include \
+	-I$(PKG_BUILD_DIR)
+
+define Build/Prepare
+	mkdir -p $(PKG_BUILD_DIR)
+	$(CP) ./src/* $(PKG_BUILD_DIR)/
+endef
+
+define Build/Compile
+	CFLAGS="$(TARGET_CFLAGS) $(TARGET_CPPFLAGS)" \
+	$(MAKE) -C $(PKG_BUILD_DIR) \
+		$(TARGET_CONFIGURE_OPTS) \
+		LIBS="$(STAGING_DIR)/usr/lib/libnl.a -lm"
+endef
+
+define Package/swconfig/install
+	$(INSTALL_DIR) $(1)/bin
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/swconfig $(1)/bin/swconfig
+endef
+
+$(eval $(call BuildPackage,swconfig))

package/swconfig/src/Makefile

@@ -0,0 +1,12 @@
+ifndef CFLAGS
+CFLAGS = -O2 -g -I ../src
+endif
+LIBS=-lnl
+
+all: swconfig
+
+%.o: %.c
+	$(CC) $(CFLAGS) -c -o $@ $^
+
+swconfig: cli.o swlib.o
+	$(CC) $(LDFLAGS) -o $@ $^ $(LIBS)

package/swconfig/src/cli.c

@@ -0,0 +1,255 @@
+/*
+ * swconfig.c: Switch configuration utility
+ *
+ * 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
+ * version 2 as published by the Free Software Foundatio.
+ *
+ * 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 <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <stdint.h>
+#include <getopt.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include <linux/types.h>
+#include <linux/netlink.h>
+#include <linux/genetlink.h>
+#include <netlink/netlink.h>
+#include <netlink/genl/genl.h>
+#include <netlink/genl/ctrl.h>
+#include <linux/switch.h>
+#include "swlib.h"
+
+#define GET		1
+#define SET		2
+
+void print_attrs(struct switch_attr *attr)
+{
+	int i = 0;
+	while (attr) {
+		const char *type;
+		switch(attr->type) {
+			case SWITCH_TYPE_INT:
+				type = "int";
+				break;
+			case SWITCH_TYPE_STRING:
+				type = "string";
+				break;
+			case SWITCH_TYPE_PORTS:
+				type = "ports";
+				break;
+			case SWITCH_TYPE_NOVAL:
+				type = "none";
+				break;
+			default:
+				type = "unknown";
+				break;
+		}
+		printf("\tAttribute %d (%s): %s (%s)\n", ++i, type, attr->name, attr->description);
+		attr = attr->next;
+	}
+}
+
+void list_attributes(struct switch_dev *dev)
+{
+	printf("Switch %d: %s(%s), ports: %d, vlans: %d\n", dev->id, dev->dev_name, dev->name, dev->ports, dev->vlans);
+	printf("     --switch\n");
+	print_attrs(dev->ops);
+	printf("     --vlan\n");
+	print_attrs(dev->vlan_ops);
+	printf("     --port\n");
+	print_attrs(dev->port_ops);
+}
+
+void print_usage(void)
+{
+	printf("swconfig dev <dev> [port <port>|vlan <vlan>] (help|set <key> <value>|get <key>)\n");
+	exit(0);
+}
+
+int main(int argc, char **argv)
+{
+	int retval = 0;
+	struct switch_dev *dev;
+	struct switch_attr *a;
+	struct switch_val val;
+	int err;
+	int i;
+
+	struct switch_port *ports;
+
+	int cmd = 0;
+	char *cdev = NULL;
+	int cport = -1;
+	int cvlan = -1;
+	char *ckey = NULL;
+	char *cvalue = NULL;
+	int chelp = 0;
+
+	if(argc < 4)
+		print_usage();
+
+	if(strcmp(argv[1], "dev"))
+		print_usage();
+
+	cdev = argv[2];
+
+	for(i = 3; i < argc; i++)
+	{
+		int p;
+		if(!strcmp(argv[i], "help"))
+		{
+			chelp = 1;
+			continue;
+		}
+		if(i + 1 >= argc)
+			print_usage();
+		p = atoi(argv[i + 1]);
+		if(!strcmp(argv[i], "port"))
+		{
+			cport = p;
+		} else if(!strcmp(argv[i], "vlan"))
+		{
+			cvlan = p;
+		} else if(!strcmp(argv[i], "set"))
+		{
+			if(argc <= i + 1)
+				print_usage();
+			cmd = SET;
+			ckey = argv[i + 1];
+			if (argc > i + 2)
+				cvalue = argv[i + 2];
+			else
+				cvalue = NULL;
+			i++;
+		} else if(!strcmp(argv[i], "get"))
+		{
+			cmd = GET;
+			ckey = argv[i + 1];
+		} else{
+			print_usage();
+		}
+		i++;
+	}
+
+	if(cport > -1 && cvlan > -1)
+		print_usage();
+
+	dev = swlib_connect(cdev);
+	if (!dev) {
+		fprintf(stderr, "Failed to connect to the switch\n");
+		return 1;
+	}
+
+	ports = malloc(sizeof(struct switch_port) * dev->ports);
+	memset(ports, 0, sizeof(struct switch_port) * dev->ports);
+	swlib_scan(dev);
+
+	if(chelp)
+	{
+		list_attributes(dev);
+		goto out;
+	}
+
+	if(cport > -1)
+		a = swlib_lookup_attr(dev, SWLIB_ATTR_GROUP_PORT, ckey);
+	else if(cvlan > -1)
+		a = swlib_lookup_attr(dev, SWLIB_ATTR_GROUP_VLAN, ckey);
+	else
+		a = swlib_lookup_attr(dev, SWLIB_ATTR_GROUP_GLOBAL, ckey);
+
+	if(!a)
+	{
+		fprintf(stderr, "Unknown attribute \"%s\"\n", ckey);
+		goto out;
+	}
+
+	switch(cmd)
+	{
+	case SET:
+		if ((a->type != SWITCH_TYPE_NOVAL) &&
+				(cvalue == NULL))
+			print_usage();
+
+		switch(a->type) {
+		case SWITCH_TYPE_INT:
+			val.value.i = atoi(cvalue);
+			break;
+		case SWITCH_TYPE_STRING:
+			val.value.s = cvalue;
+			break;
+		case SWITCH_TYPE_PORTS:
+			val.len = 0;
+			while(cvalue && *cvalue)
+			{
+				ports[val.len].flags = 0;
+				ports[val.len].id = strtol(cvalue, &cvalue, 10);
+				while(*cvalue && !isspace(*cvalue)) {
+					if (*cvalue == 't')
+						ports[val.len].flags |= SWLIB_PORT_FLAG_TAGGED;
+					cvalue++;
+				}
+				if (*cvalue)
+					cvalue++;
+				val.len++;
+			}
+			val.value.ports = ports;
+			break;
+		default:
+			break;
+		}
+		if(cvlan > -1)
+			val.port_vlan = cvlan;
+		if(cport > -1)
+			val.port_vlan = cport;
+		if(swlib_set_attr(dev, a, &val) < 0)
+		{
+			fprintf(stderr, "failed\n");
+			retval = -1;
+			goto out;
+		}
+		break;
+	case GET:
+		if(cvlan > -1)
+			val.port_vlan = cvlan;
+		if(cport > -1)
+			val.port_vlan = cport;
+		if(swlib_get_attr(dev, a, &val) < 0)
+		{
+			fprintf(stderr, "failed\n");
+			retval = -1;
+			goto out;
+		}
+		switch(a->type) {
+		case SWITCH_TYPE_INT:
+			printf("%d\n", val.value.i);
+			break;
+		case SWITCH_TYPE_STRING:
+			printf("%s\n", val.value.s);
+			break;
+		case SWITCH_TYPE_PORTS:
+			for(i = 0; i < val.len; i++)
+				printf("%d ", val.value.ports[i]);
+			printf("\n");
+			break;
+		}
+	}
+
+out:
+	swlib_free_all(dev);
+	free(ports);
+
+	return 0;
+}

package/swconfig/src/swlib.c

@@ -0,0 +1,614 @@
+/*
+ * swlib.c: Switch configuration API (user space part)
+ *
+ * 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 Lesser General Public License
+ * version 2.1 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 <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <stdint.h>
+#include <getopt.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <linux/switch.h>
+#include "swlib.h"
+
+//#define DEBUG 1
+#ifdef DEBUG
+#define DPRINTF(fmt, ...) fprintf(stderr, "%s(%d): " fmt, __func__, __LINE__, ##__VA_ARGS__)
+#else
+#define DPRINTF(fmt, ...) do {} while (0)
+#endif
+
+static struct nl_handle *handle;
+static struct nl_cache *cache;
+static struct genl_family *family;
+static struct nlattr *tb[SWITCH_ATTR_MAX];
+static int refcount = 0;
+
+static struct nla_policy port_policy[] = {
+	[SWITCH_PORT_ID] = { .type = NLA_U32 },
+	[SWITCH_PORT_FLAG_TAGGED] = { .type = NLA_FLAG },
+};
+
+static inline void *
+swlib_alloc(size_t size)
+{
+	void *ptr;
+
+	ptr = malloc(size);
+	if (!ptr)
+		goto done;
+	memset(ptr, 0, size);
+
+done:
+	return ptr;
+}
+
+static int
+wait_handler(struct nl_msg *msg, void *arg)
+{
+	int *finished = arg;
+
+	*finished = 1;
+	return NL_STOP;
+}
+
+/* helper function for performing netlink requests */
+static int
+swlib_call(int cmd, int (*call)(struct nl_msg *, void *),
+		int (*data)(struct nl_msg *, void *), void *arg)
+{
+	struct nl_msg *msg;
+	struct nl_cb *cb = NULL;
+	int finished;
+	int flags = 0;
+	int err;
+
+	msg = nlmsg_alloc();
+	if (!msg) {
+		fprintf(stderr, "Out of memory!\n");
+		exit(1);
+	}
+
+	if (!data)
+		flags |= NLM_F_DUMP;
+
+	genlmsg_put(msg, NL_AUTO_PID, NL_AUTO_SEQ, genl_family_get_id(family), 0, flags, cmd, 0);
+	if (data) {
+		if (data(msg, arg) < 0)
+			goto nla_put_failure;
+	}
+
+	cb = nl_cb_alloc(NL_CB_CUSTOM);
+	if (!cb) {
+		fprintf(stderr, "nl_cb_alloc failed.\n");
+		exit(1);
+	}
+
+	err = nl_send_auto_complete(handle, msg);
+	if (err < 0) {
+		fprintf(stderr, "nl_send_auto_complete failed: %d\n", err);
+		goto out;
+	}
+
+	finished = 0;
+
+	if (call)
+		nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, call, arg);
+
+	if (data)
+		nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, wait_handler, &finished);
+	else
+		nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, wait_handler, &finished);
+
+	err = nl_recvmsgs(handle, cb);
+	if (err < 0) {
+		goto out;
+	}
+
+	if (!finished)
+		err = nl_wait_for_ack(handle);
+
+out:
+	if (cb)
+		nl_cb_put(cb);
+nla_put_failure:
+	nlmsg_free(msg);
+	return err;
+}
+
+static int
+send_attr(struct nl_msg *msg, void *arg)
+{
+	struct switch_val *val = arg;
+	struct switch_attr *attr = val->attr;
+
+	NLA_PUT_U32(msg, SWITCH_ATTR_ID, attr->dev->id);
+	NLA_PUT_U32(msg, SWITCH_ATTR_OP_ID, attr->id);
+	switch(attr->atype) {
+	case SWLIB_ATTR_GROUP_PORT:
+		NLA_PUT_U32(msg, SWITCH_ATTR_OP_PORT, val->port_vlan);
+		break;
+	case SWLIB_ATTR_GROUP_VLAN:
+		NLA_PUT_U32(msg, SWITCH_ATTR_OP_VLAN, val->port_vlan);
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+
+nla_put_failure:
+	return -1;
+}
+
+static int
+store_port_val(struct nl_msg *msg, struct nlattr *nla, struct switch_val *val)
+{
+	struct nlattr *p;
+	int ports = val->attr->dev->ports;
+	int err = 0;
+	int remaining;
+
+	if (!val->value.ports)
+		val->value.ports = malloc(sizeof(struct switch_port) * ports);
+
+	nla_for_each_nested(p, nla, remaining) {
+		struct nlattr *tb[SWITCH_PORT_ATTR_MAX+1];
+		struct switch_port *port;
+
+		if (val->len >= ports)
+			break;
+
+		err = nla_parse_nested(tb, SWITCH_PORT_ATTR_MAX, p, port_policy);
+		if (err < 0)
+			goto out;
+
+		if (!tb[SWITCH_PORT_ID])
+			continue;
+
+		port = &val->value.ports[val->len];
+		port->id = nla_get_u32(tb[SWITCH_PORT_ID]);
+		port->flags = 0;
+		if (tb[SWITCH_PORT_FLAG_TAGGED])
+			port->flags |= SWLIB_PORT_FLAG_TAGGED;
+
+		val->len++;
+	}
+
+out:
+	return err;
+}
+
+static int
+store_val(struct nl_msg *msg, void *arg)
+{
+	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+	struct switch_val *val = arg;
+	struct switch_attr *attr = val->attr;
+
+	if (!val)
+		goto error;
+
+	if (nla_parse(tb, SWITCH_ATTR_MAX - 1, genlmsg_attrdata(gnlh, 0),
+			genlmsg_attrlen(gnlh, 0), NULL) < 0) {
+		goto error;
+	}
+
+	if (tb[SWITCH_ATTR_OP_VALUE_INT])
+		val->value.i = nla_get_u32(tb[SWITCH_ATTR_OP_VALUE_INT]);
+	else if (tb[SWITCH_ATTR_OP_VALUE_STR])
+		val->value.s = strdup(nla_get_string(tb[SWITCH_ATTR_OP_VALUE_STR]));
+	else if (tb[SWITCH_ATTR_OP_VALUE_PORTS])
+		val->err = store_port_val(msg, tb[SWITCH_ATTR_OP_VALUE_PORTS], val);
+
+	val->err = 0;
+	return 0;
+
+error:
+	return NL_SKIP;
+}
+
+int
+swlib_get_attr(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val)
+{
+	int cmd;
+	int err;
+
+	switch(attr->atype) {
+	case SWLIB_ATTR_GROUP_GLOBAL:
+		cmd = SWITCH_CMD_GET_GLOBAL;
+		break;
+	case SWLIB_ATTR_GROUP_PORT:
+		cmd = SWITCH_CMD_GET_PORT;
+		break;
+	case SWLIB_ATTR_GROUP_VLAN:
+		cmd = SWITCH_CMD_GET_VLAN;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	memset(&val->value, 0, sizeof(val->value));
+	val->len = 0;
+	val->attr = attr;
+	val->err = -EINVAL;
+	err = swlib_call(cmd, store_val, send_attr, val);
+	if (!err)
+		err = val->err;
+
+	return err;
+}
+
+static int
+send_attr_ports(struct nl_msg *msg, struct switch_val *val)
+{
+	struct nlattr *n;
+	int i;
+
+	/* TODO implement multipart? */
+	if (val->len == 0)
+		goto done;
+	n = nla_nest_start(msg, SWITCH_ATTR_OP_VALUE_PORTS);
+	if (!n)
+		goto nla_put_failure;
+	for (i = 0; i < val->len; i++) {
+		struct switch_port *port = &val->value.ports[i];
+		struct nlattr *np;
+
+		np = nla_nest_start(msg, SWITCH_ATTR_PORT);
+		if (!np)
+			goto nla_put_failure;
+
+		NLA_PUT_U32(msg, SWITCH_PORT_ID, port->id);
+		if (port->flags & SWLIB_PORT_FLAG_TAGGED)
+			NLA_PUT_FLAG(msg, SWITCH_PORT_FLAG_TAGGED);
+
+		nla_nest_end(msg, np);
+	}
+	nla_nest_end(msg, n);
+done:
+	return 0;
+
+nla_put_failure:
+	return -1;
+}
+
+static int
+send_attr_val(struct nl_msg *msg, void *arg)
+{
+	struct switch_val *val = arg;
+	struct switch_attr *attr = val->attr;
+
+	if (send_attr(msg, arg))
+		goto nla_put_failure;
+
+	switch(attr->type) {
+	case SWITCH_TYPE_NOVAL:
+		break;
+	case SWITCH_TYPE_INT:
+		NLA_PUT_U32(msg, SWITCH_ATTR_OP_VALUE_INT, val->value.i);
+		break;
+	case SWITCH_TYPE_STRING:
+		if (!val->value.s)
+			goto nla_put_failure;
+		NLA_PUT_STRING(msg, SWITCH_ATTR_OP_VALUE_STR, val->value.s);
+		break;
+	case SWITCH_TYPE_PORTS:
+		if (send_attr_ports(msg, val) < 0)
+			goto nla_put_failure;
+		break;
+	default:
+		goto nla_put_failure;
+	}
+	return 0;
+
+nla_put_failure:
+	return -1;
+}
+
+int
+swlib_set_attr(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val)
+{
+	int cmd;
+
+	switch(attr->atype) {
+	case SWLIB_ATTR_GROUP_GLOBAL:
+		cmd = SWITCH_CMD_SET_GLOBAL;
+		break;
+	case SWLIB_ATTR_GROUP_PORT:
+		cmd = SWITCH_CMD_SET_PORT;
+		break;
+	case SWLIB_ATTR_GROUP_VLAN:
+		cmd = SWITCH_CMD_SET_VLAN;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	val->attr = attr;
+	return swlib_call(cmd, NULL, send_attr_val, val);
+}
+
+
+struct attrlist_arg {
+	int id;
+	int atype;
+	struct switch_dev *dev;
+	struct switch_attr *prev;
+	struct switch_attr **head;
+};
+
+static int
+add_id(struct nl_msg *msg, void *arg)
+{
+	struct attrlist_arg *l = arg;
+
+	NLA_PUT_U32(msg, SWITCH_ATTR_ID, l->id);
+
+	return 0;
+nla_put_failure:
+	return -1;
+}
+
+static int
+add_attr(struct nl_msg *msg, void *ptr)
+{
+	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+	struct attrlist_arg *arg = ptr;
+	struct switch_attr *new;
+
+	if (nla_parse(tb, SWITCH_ATTR_MAX - 1, genlmsg_attrdata(gnlh, 0),
+			genlmsg_attrlen(gnlh, 0), NULL) < 0)
+		goto done;
+
+	new = swlib_alloc(sizeof(struct switch_attr));
+	if (!new)
+		goto done;
+
+	new->dev = arg->dev;
+	new->atype = arg->atype;
+	if (arg->prev) {
+		arg->prev->next = new;
+	} else {
+		arg->prev = *arg->head;
+	}
+	*arg->head = new;
+	arg->head = &new->next;
+
+	if (tb[SWITCH_ATTR_OP_ID])
+		new->id = nla_get_u32(tb[SWITCH_ATTR_OP_ID]);
+	if (tb[SWITCH_ATTR_OP_TYPE])
+		new->type = nla_get_u32(tb[SWITCH_ATTR_OP_TYPE]);
+	if (tb[SWITCH_ATTR_OP_NAME])
+		new->name = strdup(nla_get_string(tb[SWITCH_ATTR_OP_NAME]));
+	if (tb[SWITCH_ATTR_OP_DESCRIPTION])
+		new->description = strdup(nla_get_string(tb[SWITCH_ATTR_OP_DESCRIPTION]));
+
+done:
+	return NL_SKIP;
+}
+
+int
+swlib_scan(struct switch_dev *dev)
+{
+	struct attrlist_arg arg;
+
+	if (dev->ops || dev->port_ops || dev->vlan_ops)
+		return 0;
+
+	arg.atype = SWLIB_ATTR_GROUP_GLOBAL;
+	arg.dev = dev;
+	arg.id = dev->id;
+	arg.prev = NULL;
+	arg.head = &dev->ops;
+	swlib_call(SWITCH_CMD_LIST_GLOBAL, add_attr, add_id, &arg);
+
+	arg.atype = SWLIB_ATTR_GROUP_PORT;
+	arg.prev = NULL;
+	arg.head = &dev->port_ops;
+	swlib_call(SWITCH_CMD_LIST_PORT, add_attr, add_id, &arg);
+
+	arg.atype = SWLIB_ATTR_GROUP_VLAN;
+	arg.prev = NULL;
+	arg.head = &dev->vlan_ops;
+	swlib_call(SWITCH_CMD_LIST_VLAN, add_attr, add_id, &arg);
+
+	return 0;
+}
+
+struct switch_attr *swlib_lookup_attr(struct switch_dev *dev,
+		enum swlib_attr_group atype, const char *name)
+{
+	struct switch_attr *head;
+
+	if (!name || !dev)
+		return NULL;
+
+	switch(atype) {
+	case SWLIB_ATTR_GROUP_GLOBAL:
+		head = dev->ops;
+		break;
+	case SWLIB_ATTR_GROUP_PORT:
+		head = dev->port_ops;
+		break;
+	case SWLIB_ATTR_GROUP_VLAN:
+		head = dev->vlan_ops;
+		break;
+	}
+	while(head) {
+		if (!strcmp(name, head->name))
+			return head;
+		head = head->next;
+	}
+
+	return NULL;
+}
+
+static void
+swlib_priv_free(void)
+{
+	if (cache)
+		nl_cache_free(cache);
+	if (handle)
+		nl_handle_destroy(handle);
+	handle = NULL;
+	cache = NULL;
+}
+
+static int
+swlib_priv_init(void)
+{
+	handle = nl_handle_alloc();
+	if (!handle) {
+		DPRINTF("Failed to create handle\n");
+		goto err;
+	}
+
+	if (genl_connect(handle)) {
+		DPRINTF("Failed to connect to generic netlink\n");
+		goto err;
+	}
+
+	cache = genl_ctrl_alloc_cache(handle);
+	if (!cache) {
+		DPRINTF("Failed to allocate netlink cache\n");
+		goto err;
+	}
+
+	family = genl_ctrl_search_by_name(cache, "switch");
+	if (!family) {
+		DPRINTF("Switch API not present\n");
+		goto err;
+	}
+	return 0;
+
+err:
+	swlib_priv_free();
+	return -EINVAL;
+}
+
+struct swlib_scan_arg {
+	const char *name;
+	struct switch_dev *head;
+	struct switch_dev *ptr;
+};
+
+static int
+add_switch(struct nl_msg *msg, void *arg)
+{
+	struct swlib_scan_arg *sa = arg;
+	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+	struct switch_dev *dev;
+	const char *name;
+
+	if (nla_parse(tb, SWITCH_ATTR_MAX, genlmsg_attrdata(gnlh, 0), genlmsg_attrlen(gnlh, 0), NULL) < 0)
+		goto done;
+
+	if (!tb[SWITCH_ATTR_DEV_NAME])
+		goto done;
+
+	name = nla_get_string(tb[SWITCH_ATTR_DEV_NAME]);
+	if (sa->name && (strcmp(name, sa->name) != 0))
+		goto done;
+
+	dev = swlib_alloc(sizeof(struct switch_dev));
+	if (!dev)
+		goto done;
+
+	dev->dev_name = strdup(name);
+	if (tb[SWITCH_ATTR_ID])
+		dev->id = nla_get_u32(tb[SWITCH_ATTR_ID]);
+	if (tb[SWITCH_ATTR_NAME])
+		dev->name = strdup(nla_get_string(tb[SWITCH_ATTR_DEV_NAME]));
+	if (tb[SWITCH_ATTR_PORTS])
+		dev->ports = nla_get_u32(tb[SWITCH_ATTR_PORTS]);
+	if (tb[SWITCH_ATTR_VLANS])
+		dev->vlans = nla_get_u32(tb[SWITCH_ATTR_VLANS]);
+
+	if (!sa->head) {
+		sa->head = dev;
+		sa->ptr = dev;
+	} else {
+		sa->ptr->next = dev;
+		sa->ptr = dev;
+	}
+
+	refcount++;
+done:
+	return NL_SKIP;
+}
+
+
+struct switch_dev *
+swlib_connect(const char *name)
+{
+	struct swlib_scan_arg arg;
+	int err;
+
+	if (!refcount) {
+		if (swlib_priv_init() < 0)
+			return NULL;
+	};
+
+	arg.head = NULL;
+	arg.ptr = NULL;
+	arg.name = name;
+	swlib_call(SWITCH_CMD_GET_SWITCH, add_switch, NULL, &arg);
+
+	if (!refcount)
+		swlib_priv_free();
+
+	return arg.head;
+}
+
+static void
+swlib_free_attributes(struct switch_attr **head)
+{
+	struct switch_attr *a = *head;
+	struct switch_attr *next;
+
+	while (a) {
+		next = a->next;
+		free(a);
+		a = next;
+	}
+	*head = NULL;
+}
+
+void
+swlib_free(struct switch_dev *dev)
+{
+	swlib_free_attributes(&dev->ops);
+	swlib_free_attributes(&dev->port_ops);
+	swlib_free_attributes(&dev->vlan_ops);
+	free(dev);
+
+	if (--refcount == 0)
+		swlib_priv_free();
+}
+
+void
+swlib_free_all(struct switch_dev *dev)
+{
+	struct switch_dev *p;
+
+	while (dev) {
+		p = dev->next;
+		swlib_free(dev);
+		dev = p;
+	}
+}

package/swconfig/src/swlib.h

@@ -0,0 +1,213 @@
+/*
+ * swlib.h: Switch configuration API (user space part)
+ *
+ * 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 Lesser General Public License
+ * version 2.1 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.
+ *
+
+Usage of the library functions:
+
+  The main datastructure for a switch is the struct switch_device
+  To get started, you first need to use switch_connect() to probe
+  for switches and allocate an instance of this struct.
+
+  There are two possible usage modes:
+    dev = switch_connect("eth0");
+      - this call will look for a switch registered for the linux device
+  	  "eth0" and only allocate a switch_device for this particular switch.
+
+    dev = switch_connect(NULL)
+      - this will return one switch_device struct for each available
+  	  switch. The switch_device structs are chained with by ->next pointer
+
+  Then to query a switch for all available attributes, use:
+    swlib_scan(dev);
+
+  All allocated datastructures for the switch_device struct can be freed with
+    swlib_free(dev);
+  or
+    swlib_free_all(dev);
+
+  The latter traverses a whole chain of switch_device structs and frees them all
+
+  Switch attributes (struct switch_attr) are divided into three groups:
+    dev->ops:
+      - global settings
+    dev->port_ops:
+      - per-port settings
+    dev->vlan_ops:
+      - per-vlan settings
+
+  switch_lookup_attr() is a small helper function to locate attributes
+  by name.
+
+  switch_set_attr() and switch_get_attr() can alter or request the values
+  of attributes.
+
+Usage of the switch_attr struct:
+
+  ->atype: attribute group, one of:
+    - SWLIB_ATTR_GROUP_GLOBAL
+    - SWLIB_ATTR_GROUP_VLAN
+    - SWLIB_ATTR_GROUP_PORT
+
+  ->id: identifier for the attribute
+
+  ->type: data type, one of:
+    - SWITCH_TYPE_INT
+    - SWITCH_TYPE_STRING
+    - SWITCH_TYPE_PORT
+
+  ->name: short name of the attribute
+  ->description: longer description
+  ->next: pointer to the next attribute of the current group
+
+
+Usage of the switch_val struct:
+
+  When setting attributes, following members of the struct switch_val need
+  to be set up:
+
+    ->len (for attr->type == SWITCH_TYPE_PORT)
+    ->port_vlan:
+      - port number (for attr->atype == SWLIB_ATTR_GROUP_PORT), or:
+      - vlan number (for attr->atype == SWLIB_ATTR_GROUP_VLAN)
+    ->value.i (for attr->type == SWITCH_TYPE_INT)
+    ->value.s (for attr->type == SWITCH_TYPE_STRING)
+      - owned by the caller, not stored in the library internally
+    ->value.ports (for attr->type == SWITCH_TYPE_PORT)
+      - must point to an array of at lest val->len * sizeof(struct switch_port)
+
+  When getting string attributes, val->value.s must be freed by the caller
+  When getting port list attributes, an internal static buffer is used,
+  which changes from call to call.
+
+ */
+
+#ifndef __SWLIB_H
+#define __SWLIB_H
+
+enum swlib_attr_group {
+	SWLIB_ATTR_GROUP_GLOBAL,
+	SWLIB_ATTR_GROUP_VLAN,
+	SWLIB_ATTR_GROUP_PORT,
+};
+
+enum swlib_port_flags {
+	SWLIB_PORT_FLAG_TAGGED = (1 << 0),
+};
+
+
+struct switch_dev;
+struct switch_attr;
+struct switch_port;
+struct switch_val;
+
+struct switch_dev {
+	int id;
+	const char *name;
+	const char *dev_name;
+	int ports;
+	int vlans;
+	struct switch_attr *ops;
+	struct switch_attr *port_ops;
+	struct switch_attr *vlan_ops;
+	struct switch_dev *next;
+	void *priv;
+};
+
+struct switch_val {
+	struct switch_attr *attr;
+	int len;
+	int err;
+	int port_vlan;
+	union {
+		const char *s;
+		int i;
+		struct switch_port *ports;
+	} value;
+};
+
+struct switch_attr {
+	struct switch_dev *dev;
+	int atype;
+	int id;
+	int type;
+	const char *name;
+	const char *description;
+	struct switch_attr *next;
+};
+
+struct switch_port {
+	unsigned int id;
+	unsigned int flags;
+};
+
+/**
+ * swlib_connect: connect to the switch through netlink
+ * @name: name of the ethernet interface,
+ *
+ * if name is NULL, it connect and builds a chain of all switches
+ */
+struct switch_dev *swlib_connect(const char *name);
+
+/**
+ * swlib_free: free all dynamically allocated data for the switch connection
+ * @dev: switch device struct
+ *
+ * all members of a switch device chain (generated by swlib_connect(NULL))
+ * must be freed individually
+ */
+void swlib_free(struct switch_dev *dev);
+
+/**
+ * swlib_free_all: run swlib_free on all devices in the chain
+ * @dev: switch device struct
+ */
+void swlib_free_all(struct switch_dev *dev);
+
+/**
+ * swlib_scan: probe the switch driver for available commands/attributes
+ * @dev: switch device struct
+ */
+int swlib_scan(struct switch_dev *dev);
+
+/**
+ * swlib_lookup_attr: look up a switch attribute
+ * @dev: switch device struct
+ * @type: global, port or vlan
+ * @name: name of the attribute
+ */
+struct switch_attr *swlib_lookup_attr(struct switch_dev *dev,
+		enum swlib_attr_group atype, const char *name);
+
+/**
+ * swlib_set_attr: set the value for an attribute
+ * @dev: switch device struct
+ * @attr: switch attribute struct
+ * @val: attribute value pointer
+ * returns 0 on success
+ */
+int swlib_set_attr(struct switch_dev *dev, struct switch_attr *attr,
+		struct switch_val *val);
+
+/**
+ * swlib_get_attr: get the value for an attribute
+ * @dev: switch device struct
+ * @attr: switch attribute struct
+ * @val: attribute value pointer
+ * returns 0 on success
+ * for string attributes, the result string must be freed by the caller
+ */
+int swlib_get_attr(struct switch_dev *dev, struct switch_attr *attr,
+		struct switch_val *val);
+
+#endif

target/linux/generic-2.6/config-2.6.26

@@ -1538,6 +1538,7 @@ CONFIG_SUNRPC_GSS=m
 # CONFIG_SUN_PARTITION is not set
 CONFIG_SUSPEND_UP_POSSIBLE=y
 CONFIG_SWAP=y
+# CONFIG_SWCONFIG is not set
 # CONFIG_SYNCLINK_CS is not set
 CONFIG_SYN_COOKIES=y
 CONFIG_SYSCTL=y

target/linux/generic-2.6/config-2.6.27

@@ -1580,6 +1580,7 @@ CONFIG_SUNRPC_GSS=m
 # CONFIG_SUN_PARTITION is not set
 CONFIG_SUSPEND_UP_POSSIBLE=y
 CONFIG_SWAP=y
+# CONFIG_SWCONFIG is not set
 # CONFIG_SYNCLINK_CS is not set
 CONFIG_SYN_COOKIES=y
 CONFIG_SYSCTL=y

target/linux/generic-2.6/files-2.6.26/drivers/net/phy/swconfig.c

@@ -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);
+

target/linux/generic-2.6/files-2.6.26/include/linux/switch.h

@@ -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

target/linux/generic-2.6/files-2.6.27/drivers/net/phy/swconfig.c

@@ -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);
+

target/linux/generic-2.6/files-2.6.27/include/linux/switch.h

@@ -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

target/linux/generic-2.6/patches-2.6.26/650-swconfig.patch

@@ -0,0 +1,25 @@
+--- a/drivers/net/phy/Kconfig
++++ b/drivers/net/phy/Kconfig
+@@ -13,6 +13,12 @@ menuconfig PHYLIB
+ 
+ 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
+--- a/drivers/net/phy/Makefile
++++ b/drivers/net/phy/Makefile
+@@ -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

target/linux/generic-2.6/patches-2.6.27/650-swconfig.patch

@@ -0,0 +1,25 @@
+--- a/drivers/net/phy/Kconfig
++++ b/drivers/net/phy/Kconfig
+@@ -13,6 +13,12 @@ menuconfig PHYLIB
+ 
+ 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
+--- a/drivers/net/phy/Makefile
++++ b/drivers/net/phy/Makefile
+@@ -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