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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
11 #include <linux/version.h>
14 * Sysfs attributes of bridge for Open vSwitch
16 * This has been shamelessly copied from the kernel sources.
19 #include <linux/capability.h>
20 #include <linux/device.h>
21 #include <linux/kernel.h>
22 #include <linux/netdevice.h>
23 #include <linux/if_bridge.h>
24 #include <linux/rtnetlink.h>
25 #include <linux/version.h>
29 #include "vport-internal_dev.h"
33 /* Hack to attempt to build on more platforms. */
34 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,21)
35 #define INTERNAL_DEVICE_ATTR CLASS_DEVICE_ATTR
36 #define DEVICE_PARAMS struct class_device *d
38 #define DEV_ATTR(NAME) class_device_attr_##NAME
40 #define INTERNAL_DEVICE_ATTR DEVICE_ATTR
41 #define DEVICE_PARAMS struct device *d, struct device_attribute *attr
42 #define DEVICE_ARGS d, attr
43 #define DEV_ATTR(NAME) dev_attr_##NAME
46 struct datapath *sysfs_get_dp(struct net_device *netdev)
48 struct vport *vport = internal_dev_get_vport(netdev);
49 struct dp_port *dp_port;
54 dp_port = vport_get_dp_port(vport);
61 * Common code for storing bridge parameters.
63 static ssize_t store_bridge_parm(DEVICE_PARAMS,
64 const char *buf, size_t len,
65 void (*set)(struct datapath *, unsigned long))
71 if (!capable(CAP_NET_ADMIN))
74 val = simple_strtoul(buf, &endp, 0);
78 /* xxx We use a default value of 0 for all fields. If the caller is
79 * xxx attempting to set the value to our default, just silently
80 * xxx ignore the request.
87 dp = sysfs_get_dp(to_net_dev(d));
89 printk("%s: xxx writing dp parms not supported yet!\n",
101 static ssize_t show_forward_delay(DEVICE_PARAMS, char *buf)
103 return sprintf(buf, "%d\n", 0);
106 static void set_forward_delay(struct datapath *dp, unsigned long val)
108 printk("%s: xxx attempt to set_forward_delay()\n", dp_name(dp));
111 static ssize_t store_forward_delay(DEVICE_PARAMS,
112 const char *buf, size_t len)
114 return store_bridge_parm(DEVICE_ARGS, buf, len, set_forward_delay);
116 static INTERNAL_DEVICE_ATTR(forward_delay, S_IRUGO | S_IWUSR,
117 show_forward_delay, store_forward_delay);
119 static ssize_t show_hello_time(DEVICE_PARAMS, char *buf)
121 return sprintf(buf, "%d\n", 0);
124 static void set_hello_time(struct datapath *dp, unsigned long val)
126 printk("%s: xxx attempt to set_hello_time()\n", dp_name(dp));
129 static ssize_t store_hello_time(DEVICE_PARAMS,
133 return store_bridge_parm(DEVICE_ARGS, buf, len, set_hello_time);
135 static INTERNAL_DEVICE_ATTR(hello_time, S_IRUGO | S_IWUSR, show_hello_time,
138 static ssize_t show_max_age(DEVICE_PARAMS, char *buf)
140 return sprintf(buf, "%d\n", 0);
143 static void set_max_age(struct datapath *dp, unsigned long val)
145 printk("%s: xxx attempt to set_max_age()\n", dp_name(dp));
148 static ssize_t store_max_age(DEVICE_PARAMS,
149 const char *buf, size_t len)
151 return store_bridge_parm(DEVICE_ARGS, buf, len, set_max_age);
153 static INTERNAL_DEVICE_ATTR(max_age, S_IRUGO | S_IWUSR, show_max_age, store_max_age);
155 static ssize_t show_ageing_time(DEVICE_PARAMS, char *buf)
157 return sprintf(buf, "%d\n", 0);
160 static void set_ageing_time(struct datapath *dp, unsigned long val)
162 printk("%s: xxx attempt to set_ageing_time()\n", dp_name(dp));
165 static ssize_t store_ageing_time(DEVICE_PARAMS,
166 const char *buf, size_t len)
168 return store_bridge_parm(DEVICE_ARGS, buf, len, set_ageing_time);
170 static INTERNAL_DEVICE_ATTR(ageing_time, S_IRUGO | S_IWUSR, show_ageing_time,
173 static ssize_t show_stp_state(DEVICE_PARAMS, char *buf)
175 return sprintf(buf, "%d\n", 0);
179 static ssize_t store_stp_state(DEVICE_PARAMS,
184 ssize_t result = len;
188 dp = sysfs_get_dp(to_net_dev(d));
190 printk("%s: xxx attempt to set_stp_state()\n", dp_name(dp));
198 static INTERNAL_DEVICE_ATTR(stp_state, S_IRUGO | S_IWUSR, show_stp_state,
201 static ssize_t show_priority(DEVICE_PARAMS, char *buf)
203 return sprintf(buf, "%d\n", 0);
206 static void set_priority(struct datapath *dp, unsigned long val)
208 printk("%s: xxx attempt to set_priority()\n", dp_name(dp));
211 static ssize_t store_priority(DEVICE_PARAMS,
212 const char *buf, size_t len)
214 return store_bridge_parm(DEVICE_ARGS, buf, len, set_priority);
216 static INTERNAL_DEVICE_ATTR(priority, S_IRUGO | S_IWUSR, show_priority, store_priority);
218 static ssize_t show_root_id(DEVICE_PARAMS, char *buf)
220 return sprintf(buf, "0000.010203040506\n");
222 static INTERNAL_DEVICE_ATTR(root_id, S_IRUGO, show_root_id, NULL);
224 static ssize_t show_bridge_id(DEVICE_PARAMS, char *buf)
231 vport = internal_dev_get_vport(to_net_dev(d));
233 const unsigned char *addr;
235 addr = vport_get_addr(vport);
236 result = sprintf(buf, "%.2x%.2x.%.2x%.2x%.2x%.2x%.2x%.2x\n",
237 0, 0, addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
245 static INTERNAL_DEVICE_ATTR(bridge_id, S_IRUGO, show_bridge_id, NULL);
247 static ssize_t show_root_port(DEVICE_PARAMS, char *buf)
249 return sprintf(buf, "%d\n", 0);
251 static INTERNAL_DEVICE_ATTR(root_port, S_IRUGO, show_root_port, NULL);
253 static ssize_t show_root_path_cost(DEVICE_PARAMS, char *buf)
255 return sprintf(buf, "%d\n", 0);
257 static INTERNAL_DEVICE_ATTR(root_path_cost, S_IRUGO, show_root_path_cost, NULL);
259 static ssize_t show_topology_change(DEVICE_PARAMS, char *buf)
261 return sprintf(buf, "%d\n", 0);
263 static INTERNAL_DEVICE_ATTR(topology_change, S_IRUGO, show_topology_change, NULL);
265 static ssize_t show_topology_change_detected(DEVICE_PARAMS, char *buf)
267 return sprintf(buf, "%d\n", 0);
269 static INTERNAL_DEVICE_ATTR(topology_change_detected, S_IRUGO,
270 show_topology_change_detected, NULL);
272 static ssize_t show_hello_timer(DEVICE_PARAMS, char *buf)
274 return sprintf(buf, "%d\n", 0);
276 static INTERNAL_DEVICE_ATTR(hello_timer, S_IRUGO, show_hello_timer, NULL);
278 static ssize_t show_tcn_timer(DEVICE_PARAMS, char *buf)
280 return sprintf(buf, "%d\n", 0);
282 static INTERNAL_DEVICE_ATTR(tcn_timer, S_IRUGO, show_tcn_timer, NULL);
284 static ssize_t show_topology_change_timer(DEVICE_PARAMS, char *buf)
286 return sprintf(buf, "%d\n", 0);
288 static INTERNAL_DEVICE_ATTR(topology_change_timer, S_IRUGO, show_topology_change_timer,
291 static ssize_t show_gc_timer(DEVICE_PARAMS, char *buf)
293 return sprintf(buf, "%d\n", 0);
295 static INTERNAL_DEVICE_ATTR(gc_timer, S_IRUGO, show_gc_timer, NULL);
297 static ssize_t show_group_addr(DEVICE_PARAMS, char *buf)
299 return sprintf(buf, "00:01:02:03:04:05\n");
302 static ssize_t store_group_addr(DEVICE_PARAMS,
303 const char *buf, size_t len)
306 ssize_t result = len;
310 dp = sysfs_get_dp(to_net_dev(d));
312 printk("%s: xxx attempt to store_group_addr()\n", dp_name(dp));
321 static INTERNAL_DEVICE_ATTR(group_addr, S_IRUGO | S_IWUSR,
322 show_group_addr, store_group_addr);
324 static struct attribute *bridge_attrs[] = {
325 &DEV_ATTR(forward_delay).attr,
326 &DEV_ATTR(hello_time).attr,
327 &DEV_ATTR(max_age).attr,
328 &DEV_ATTR(ageing_time).attr,
329 &DEV_ATTR(stp_state).attr,
330 &DEV_ATTR(priority).attr,
331 &DEV_ATTR(bridge_id).attr,
332 &DEV_ATTR(root_id).attr,
333 &DEV_ATTR(root_path_cost).attr,
334 &DEV_ATTR(root_port).attr,
335 &DEV_ATTR(topology_change).attr,
336 &DEV_ATTR(topology_change_detected).attr,
337 &DEV_ATTR(hello_timer).attr,
338 &DEV_ATTR(tcn_timer).attr,
339 &DEV_ATTR(topology_change_timer).attr,
340 &DEV_ATTR(gc_timer).attr,
341 &DEV_ATTR(group_addr).attr,
345 static struct attribute_group bridge_group = {
346 .name = SYSFS_BRIDGE_ATTR, /* "bridge" */
347 .attrs = bridge_attrs,
351 * Add entries in sysfs onto the existing network class device
353 * Adds a attribute group "bridge" containing tuning parameters.
354 * Sub directory to hold links to interfaces.
356 * Note: the ifobj exists only to be a subdirectory
357 * to hold links. The ifobj exists in the same data structure
358 * as its parent the bridge so reference counting works.
360 int dp_sysfs_add_dp(struct datapath *dp)
362 struct kobject *kobj = vport_get_kobj(dp->ports[ODPP_LOCAL]->vport);
365 /* Create /sys/class/net/<devname>/bridge directory. */
366 err = sysfs_create_group(kobj, &bridge_group);
368 pr_info("%s: can't create group %s/%s\n",
369 __func__, dp_name(dp), bridge_group.name);
373 /* Create /sys/class/net/<devname>/brif directory. */
374 err = kobject_add(&dp->ifobj, kobj, SYSFS_BRIDGE_PORT_SUBDIR);
376 pr_info("%s: can't add kobject (directory) %s/%s\n",
377 __FUNCTION__, dp_name(dp), kobject_name(&dp->ifobj));
380 kobject_uevent(&dp->ifobj, KOBJ_ADD);
384 sysfs_remove_group(kobj, &bridge_group);
389 int dp_sysfs_del_dp(struct datapath *dp)
391 struct kobject *kobj = vport_get_kobj(dp->ports[ODPP_LOCAL]->vport);
393 kobject_del(&dp->ifobj);
394 sysfs_remove_group(kobj, &bridge_group);
398 #else /* !CONFIG_SYSFS */
399 int dp_sysfs_add_dp(struct datapath *dp) { return 0; }
400 int dp_sysfs_del_dp(struct datapath *dp) { return 0; }
401 int dp_sysfs_add_if(struct dp_port *p) { return 0; }
402 int dp_sysfs_del_if(struct dp_port *p) { return 0; }
403 #endif /* !CONFIG_SYSFS */