2 * Copyright (c) 2009, 2010 Nicira Networks.
3 * Distributed under the terms of the GNU GPL version 2.
5 * Significant portions of this file may be copied from parts of the Linux
6 * kernel, by Linus Torvalds and others.
9 #include <linux/version.h>
12 * Sysfs attributes of bridge for Open vSwitch
14 * This has been shamelessly copied from the kernel sources.
17 #include <linux/capability.h>
18 #include <linux/device.h>
19 #include <linux/kernel.h>
20 #include <linux/netdevice.h>
21 #include <linux/if_bridge.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/version.h>
27 #include "vport-internal_dev.h"
31 /* Hack to attempt to build on more platforms. */
32 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,21)
33 #define INTERNAL_DEVICE_ATTR CLASS_DEVICE_ATTR
34 #define DEVICE_PARAMS struct class_device *d
36 #define DEV_ATTR(NAME) class_device_attr_##NAME
38 #define INTERNAL_DEVICE_ATTR DEVICE_ATTR
39 #define DEVICE_PARAMS struct device *d, struct device_attribute *attr
40 #define DEVICE_ARGS d, attr
41 #define DEV_ATTR(NAME) dev_attr_##NAME
44 struct datapath *sysfs_get_dp(struct net_device *netdev)
46 struct vport *vport = internal_dev_get_vport(netdev);
47 struct dp_port *dp_port;
52 dp_port = vport_get_dp_port(vport);
59 * Common code for storing bridge parameters.
61 static ssize_t store_bridge_parm(DEVICE_PARAMS,
62 const char *buf, size_t len,
63 void (*set)(struct datapath *, unsigned long))
69 if (!capable(CAP_NET_ADMIN))
72 val = simple_strtoul(buf, &endp, 0);
76 /* xxx We use a default value of 0 for all fields. If the caller is
77 * xxx attempting to set the value to our default, just silently
78 * xxx ignore the request.
85 dp = sysfs_get_dp(to_net_dev(d));
87 printk("%s: xxx writing dp parms not supported yet!\n",
99 static ssize_t show_forward_delay(DEVICE_PARAMS, char *buf)
101 return sprintf(buf, "%d\n", 0);
104 static void set_forward_delay(struct datapath *dp, unsigned long val)
106 printk("%s: xxx attempt to set_forward_delay()\n", dp_name(dp));
109 static ssize_t store_forward_delay(DEVICE_PARAMS,
110 const char *buf, size_t len)
112 return store_bridge_parm(DEVICE_ARGS, buf, len, set_forward_delay);
114 static INTERNAL_DEVICE_ATTR(forward_delay, S_IRUGO | S_IWUSR,
115 show_forward_delay, store_forward_delay);
117 static ssize_t show_hello_time(DEVICE_PARAMS, char *buf)
119 return sprintf(buf, "%d\n", 0);
122 static void set_hello_time(struct datapath *dp, unsigned long val)
124 printk("%s: xxx attempt to set_hello_time()\n", dp_name(dp));
127 static ssize_t store_hello_time(DEVICE_PARAMS,
131 return store_bridge_parm(DEVICE_ARGS, buf, len, set_hello_time);
133 static INTERNAL_DEVICE_ATTR(hello_time, S_IRUGO | S_IWUSR, show_hello_time,
136 static ssize_t show_max_age(DEVICE_PARAMS, char *buf)
138 return sprintf(buf, "%d\n", 0);
141 static void set_max_age(struct datapath *dp, unsigned long val)
143 printk("%s: xxx attempt to set_max_age()\n", dp_name(dp));
146 static ssize_t store_max_age(DEVICE_PARAMS,
147 const char *buf, size_t len)
149 return store_bridge_parm(DEVICE_ARGS, buf, len, set_max_age);
151 static INTERNAL_DEVICE_ATTR(max_age, S_IRUGO | S_IWUSR, show_max_age, store_max_age);
153 static ssize_t show_ageing_time(DEVICE_PARAMS, char *buf)
155 return sprintf(buf, "%d\n", 0);
158 static void set_ageing_time(struct datapath *dp, unsigned long val)
160 printk("%s: xxx attempt to set_ageing_time()\n", dp_name(dp));
163 static ssize_t store_ageing_time(DEVICE_PARAMS,
164 const char *buf, size_t len)
166 return store_bridge_parm(DEVICE_ARGS, buf, len, set_ageing_time);
168 static INTERNAL_DEVICE_ATTR(ageing_time, S_IRUGO | S_IWUSR, show_ageing_time,
171 static ssize_t show_stp_state(DEVICE_PARAMS, char *buf)
173 return sprintf(buf, "%d\n", 0);
177 static ssize_t store_stp_state(DEVICE_PARAMS,
182 ssize_t result = len;
186 dp = sysfs_get_dp(to_net_dev(d));
188 printk("%s: xxx attempt to set_stp_state()\n", dp_name(dp));
196 static INTERNAL_DEVICE_ATTR(stp_state, S_IRUGO | S_IWUSR, show_stp_state,
199 static ssize_t show_priority(DEVICE_PARAMS, char *buf)
201 return sprintf(buf, "%d\n", 0);
204 static void set_priority(struct datapath *dp, unsigned long val)
206 printk("%s: xxx attempt to set_priority()\n", dp_name(dp));
209 static ssize_t store_priority(DEVICE_PARAMS,
210 const char *buf, size_t len)
212 return store_bridge_parm(DEVICE_ARGS, buf, len, set_priority);
214 static INTERNAL_DEVICE_ATTR(priority, S_IRUGO | S_IWUSR, show_priority, store_priority);
216 static ssize_t show_root_id(DEVICE_PARAMS, char *buf)
218 return sprintf(buf, "0000.010203040506\n");
220 static INTERNAL_DEVICE_ATTR(root_id, S_IRUGO, show_root_id, NULL);
222 static ssize_t show_bridge_id(DEVICE_PARAMS, char *buf)
229 vport = internal_dev_get_vport(to_net_dev(d));
231 const unsigned char *addr;
233 addr = vport_get_addr(vport);
234 result = sprintf(buf, "%.2x%.2x.%.2x%.2x%.2x%.2x%.2x%.2x\n",
235 0, 0, addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
243 static INTERNAL_DEVICE_ATTR(bridge_id, S_IRUGO, show_bridge_id, NULL);
245 static ssize_t show_root_port(DEVICE_PARAMS, char *buf)
247 return sprintf(buf, "%d\n", 0);
249 static INTERNAL_DEVICE_ATTR(root_port, S_IRUGO, show_root_port, NULL);
251 static ssize_t show_root_path_cost(DEVICE_PARAMS, char *buf)
253 return sprintf(buf, "%d\n", 0);
255 static INTERNAL_DEVICE_ATTR(root_path_cost, S_IRUGO, show_root_path_cost, NULL);
257 static ssize_t show_topology_change(DEVICE_PARAMS, char *buf)
259 return sprintf(buf, "%d\n", 0);
261 static INTERNAL_DEVICE_ATTR(topology_change, S_IRUGO, show_topology_change, NULL);
263 static ssize_t show_topology_change_detected(DEVICE_PARAMS, char *buf)
265 return sprintf(buf, "%d\n", 0);
267 static INTERNAL_DEVICE_ATTR(topology_change_detected, S_IRUGO,
268 show_topology_change_detected, NULL);
270 static ssize_t show_hello_timer(DEVICE_PARAMS, char *buf)
272 return sprintf(buf, "%d\n", 0);
274 static INTERNAL_DEVICE_ATTR(hello_timer, S_IRUGO, show_hello_timer, NULL);
276 static ssize_t show_tcn_timer(DEVICE_PARAMS, char *buf)
278 return sprintf(buf, "%d\n", 0);
280 static INTERNAL_DEVICE_ATTR(tcn_timer, S_IRUGO, show_tcn_timer, NULL);
282 static ssize_t show_topology_change_timer(DEVICE_PARAMS, char *buf)
284 return sprintf(buf, "%d\n", 0);
286 static INTERNAL_DEVICE_ATTR(topology_change_timer, S_IRUGO, show_topology_change_timer,
289 static ssize_t show_gc_timer(DEVICE_PARAMS, char *buf)
291 return sprintf(buf, "%d\n", 0);
293 static INTERNAL_DEVICE_ATTR(gc_timer, S_IRUGO, show_gc_timer, NULL);
295 static ssize_t show_group_addr(DEVICE_PARAMS, char *buf)
297 return sprintf(buf, "00:01:02:03:04:05\n");
300 static ssize_t store_group_addr(DEVICE_PARAMS,
301 const char *buf, size_t len)
304 ssize_t result = len;
308 dp = sysfs_get_dp(to_net_dev(d));
310 printk("%s: xxx attempt to store_group_addr()\n", dp_name(dp));
319 static INTERNAL_DEVICE_ATTR(group_addr, S_IRUGO | S_IWUSR,
320 show_group_addr, store_group_addr);
322 static struct attribute *bridge_attrs[] = {
323 &DEV_ATTR(forward_delay).attr,
324 &DEV_ATTR(hello_time).attr,
325 &DEV_ATTR(max_age).attr,
326 &DEV_ATTR(ageing_time).attr,
327 &DEV_ATTR(stp_state).attr,
328 &DEV_ATTR(priority).attr,
329 &DEV_ATTR(bridge_id).attr,
330 &DEV_ATTR(root_id).attr,
331 &DEV_ATTR(root_path_cost).attr,
332 &DEV_ATTR(root_port).attr,
333 &DEV_ATTR(topology_change).attr,
334 &DEV_ATTR(topology_change_detected).attr,
335 &DEV_ATTR(hello_timer).attr,
336 &DEV_ATTR(tcn_timer).attr,
337 &DEV_ATTR(topology_change_timer).attr,
338 &DEV_ATTR(gc_timer).attr,
339 &DEV_ATTR(group_addr).attr,
343 static struct attribute_group bridge_group = {
344 .name = SYSFS_BRIDGE_ATTR, /* "bridge" */
345 .attrs = bridge_attrs,
349 * Add entries in sysfs onto the existing network class device
351 * Adds a attribute group "bridge" containing tuning parameters.
352 * Sub directory to hold links to interfaces.
354 * Note: the ifobj exists only to be a subdirectory
355 * to hold links. The ifobj exists in the same data structure
356 * as its parent the bridge so reference counting works.
358 int dp_sysfs_add_dp(struct datapath *dp)
360 struct kobject *kobj = vport_get_kobj(dp->ports[ODPP_LOCAL]->vport);
363 /* Create /sys/class/net/<devname>/bridge directory. */
364 err = sysfs_create_group(kobj, &bridge_group);
366 pr_info("%s: can't create group %s/%s\n",
367 __func__, dp_name(dp), bridge_group.name);
371 /* Create /sys/class/net/<devname>/brif directory. */
372 err = kobject_add(&dp->ifobj, kobj, SYSFS_BRIDGE_PORT_SUBDIR);
374 pr_info("%s: can't add kobject (directory) %s/%s\n",
375 __FUNCTION__, dp_name(dp), kobject_name(&dp->ifobj));
378 kobject_uevent(&dp->ifobj, KOBJ_ADD);
382 sysfs_remove_group(kobj, &bridge_group);
387 int dp_sysfs_del_dp(struct datapath *dp)
389 struct kobject *kobj = vport_get_kobj(dp->ports[ODPP_LOCAL]->vport);
391 kobject_del(&dp->ifobj);
392 sysfs_remove_group(kobj, &bridge_group);
396 #else /* !CONFIG_SYSFS */
397 int dp_sysfs_add_dp(struct datapath *dp) { return 0; }
398 int dp_sysfs_del_dp(struct datapath *dp) { return 0; }
399 int dp_sysfs_add_if(struct dp_port *p) { return 0; }
400 int dp_sysfs_del_if(struct dp_port *p) { return 0; }
401 #endif /* !CONFIG_SYSFS */