2 * Sysfs attributes of bridge ports
3 * Linux ethernet bridge
6 * Stephen Hemminger <shemminger@osdl.org>
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version
11 * 2 of the License, or (at your option) any later version.
14 #include <linux/capability.h>
15 #include <linux/kernel.h>
16 #include <linux/netdevice.h>
17 #include <linux/if_bridge.h>
18 #include <linux/rtnetlink.h>
19 #include <linux/spinlock.h>
20 #include <linux/times.h>
22 #include "br_private.h"
24 #define to_dev(obj) container_of(obj, struct device, kobj)
25 #define to_bridge(cd) ((struct net_bridge *)(to_net_dev(cd)->priv))
28 * Common code for storing bridge parameters.
30 static ssize_t
store_bridge_parm(struct device
*d
,
31 const char *buf
, size_t len
,
32 void (*set
)(struct net_bridge
*, unsigned long))
34 struct net_bridge
*br
= to_bridge(d
);
38 if (!capable(CAP_NET_ADMIN
))
41 val
= simple_strtoul(buf
, &endp
, 0);
45 spin_lock_bh(&br
->lock
);
47 spin_unlock_bh(&br
->lock
);
52 static ssize_t
show_forward_delay(struct device
*d
,
53 struct device_attribute
*attr
, char *buf
)
55 struct net_bridge
*br
= to_bridge(d
);
56 return sprintf(buf
, "%lu\n", jiffies_to_clock_t(br
->forward_delay
));
59 static void set_forward_delay(struct net_bridge
*br
, unsigned long val
)
61 unsigned long delay
= clock_t_to_jiffies(val
);
62 br
->forward_delay
= delay
;
63 if (br_is_root_bridge(br
))
64 br
->bridge_forward_delay
= delay
;
67 static ssize_t
store_forward_delay(struct device
*d
,
68 struct device_attribute
*attr
,
69 const char *buf
, size_t len
)
71 return store_bridge_parm(d
, buf
, len
, set_forward_delay
);
73 static DEVICE_ATTR(forward_delay
, S_IRUGO
| S_IWUSR
,
74 show_forward_delay
, store_forward_delay
);
76 static ssize_t
show_hello_time(struct device
*d
, struct device_attribute
*attr
,
79 return sprintf(buf
, "%lu\n",
80 jiffies_to_clock_t(to_bridge(d
)->hello_time
));
83 static void set_hello_time(struct net_bridge
*br
, unsigned long val
)
85 unsigned long t
= clock_t_to_jiffies(val
);
87 if (br_is_root_bridge(br
))
88 br
->bridge_hello_time
= t
;
91 static ssize_t
store_hello_time(struct device
*d
,
92 struct device_attribute
*attr
, const char *buf
,
95 return store_bridge_parm(d
, buf
, len
, set_hello_time
);
97 static DEVICE_ATTR(hello_time
, S_IRUGO
| S_IWUSR
, show_hello_time
,
100 static ssize_t
show_max_age(struct device
*d
, struct device_attribute
*attr
,
103 return sprintf(buf
, "%lu\n",
104 jiffies_to_clock_t(to_bridge(d
)->max_age
));
107 static void set_max_age(struct net_bridge
*br
, unsigned long val
)
109 unsigned long t
= clock_t_to_jiffies(val
);
111 if (br_is_root_bridge(br
))
112 br
->bridge_max_age
= t
;
115 static ssize_t
store_max_age(struct device
*d
, struct device_attribute
*attr
,
116 const char *buf
, size_t len
)
118 return store_bridge_parm(d
, buf
, len
, set_max_age
);
120 static DEVICE_ATTR(max_age
, S_IRUGO
| S_IWUSR
, show_max_age
, store_max_age
);
122 static ssize_t
show_ageing_time(struct device
*d
,
123 struct device_attribute
*attr
, char *buf
)
125 struct net_bridge
*br
= to_bridge(d
);
126 return sprintf(buf
, "%lu\n", jiffies_to_clock_t(br
->ageing_time
));
129 static void set_ageing_time(struct net_bridge
*br
, unsigned long val
)
131 br
->ageing_time
= clock_t_to_jiffies(val
);
134 static ssize_t
store_ageing_time(struct device
*d
,
135 struct device_attribute
*attr
,
136 const char *buf
, size_t len
)
138 return store_bridge_parm(d
, buf
, len
, set_ageing_time
);
140 static DEVICE_ATTR(ageing_time
, S_IRUGO
| S_IWUSR
, show_ageing_time
,
143 static ssize_t
show_stp_state(struct device
*d
,
144 struct device_attribute
*attr
, char *buf
)
146 struct net_bridge
*br
= to_bridge(d
);
147 return sprintf(buf
, "%d\n", br
->stp_enabled
);
150 static void set_stp_state(struct net_bridge
*br
, unsigned long val
)
152 br
->stp_enabled
= val
;
155 static ssize_t
store_stp_state(struct device
*d
,
156 struct device_attribute
*attr
, const char *buf
,
159 return store_bridge_parm(d
, buf
, len
, set_stp_state
);
161 static DEVICE_ATTR(stp_state
, S_IRUGO
| S_IWUSR
, show_stp_state
,
164 static ssize_t
show_priority(struct device
*d
, struct device_attribute
*attr
,
167 struct net_bridge
*br
= to_bridge(d
);
168 return sprintf(buf
, "%d\n",
169 (br
->bridge_id
.prio
[0] << 8) | br
->bridge_id
.prio
[1]);
172 static void set_priority(struct net_bridge
*br
, unsigned long val
)
174 br_stp_set_bridge_priority(br
, (u16
) val
);
177 static ssize_t
store_priority(struct device
*d
, struct device_attribute
*attr
,
178 const char *buf
, size_t len
)
180 return store_bridge_parm(d
, buf
, len
, set_priority
);
182 static DEVICE_ATTR(priority
, S_IRUGO
| S_IWUSR
, show_priority
, store_priority
);
184 static ssize_t
show_root_id(struct device
*d
, struct device_attribute
*attr
,
187 return br_show_bridge_id(buf
, &to_bridge(d
)->designated_root
);
189 static DEVICE_ATTR(root_id
, S_IRUGO
, show_root_id
, NULL
);
191 static ssize_t
show_bridge_id(struct device
*d
, struct device_attribute
*attr
,
194 return br_show_bridge_id(buf
, &to_bridge(d
)->bridge_id
);
196 static DEVICE_ATTR(bridge_id
, S_IRUGO
, show_bridge_id
, NULL
);
198 static ssize_t
show_root_port(struct device
*d
, struct device_attribute
*attr
,
201 return sprintf(buf
, "%d\n", to_bridge(d
)->root_port
);
203 static DEVICE_ATTR(root_port
, S_IRUGO
, show_root_port
, NULL
);
205 static ssize_t
show_root_path_cost(struct device
*d
,
206 struct device_attribute
*attr
, char *buf
)
208 return sprintf(buf
, "%d\n", to_bridge(d
)->root_path_cost
);
210 static DEVICE_ATTR(root_path_cost
, S_IRUGO
, show_root_path_cost
, NULL
);
212 static ssize_t
show_topology_change(struct device
*d
,
213 struct device_attribute
*attr
, char *buf
)
215 return sprintf(buf
, "%d\n", to_bridge(d
)->topology_change
);
217 static DEVICE_ATTR(topology_change
, S_IRUGO
, show_topology_change
, NULL
);
219 static ssize_t
show_topology_change_detected(struct device
*d
,
220 struct device_attribute
*attr
,
223 struct net_bridge
*br
= to_bridge(d
);
224 return sprintf(buf
, "%d\n", br
->topology_change_detected
);
226 static DEVICE_ATTR(topology_change_detected
, S_IRUGO
,
227 show_topology_change_detected
, NULL
);
229 static ssize_t
show_hello_timer(struct device
*d
,
230 struct device_attribute
*attr
, char *buf
)
232 struct net_bridge
*br
= to_bridge(d
);
233 return sprintf(buf
, "%ld\n", br_timer_value(&br
->hello_timer
));
235 static DEVICE_ATTR(hello_timer
, S_IRUGO
, show_hello_timer
, NULL
);
237 static ssize_t
show_tcn_timer(struct device
*d
, struct device_attribute
*attr
,
240 struct net_bridge
*br
= to_bridge(d
);
241 return sprintf(buf
, "%ld\n", br_timer_value(&br
->tcn_timer
));
243 static DEVICE_ATTR(tcn_timer
, S_IRUGO
, show_tcn_timer
, NULL
);
245 static ssize_t
show_topology_change_timer(struct device
*d
,
246 struct device_attribute
*attr
,
249 struct net_bridge
*br
= to_bridge(d
);
250 return sprintf(buf
, "%ld\n", br_timer_value(&br
->topology_change_timer
));
252 static DEVICE_ATTR(topology_change_timer
, S_IRUGO
, show_topology_change_timer
,
255 static ssize_t
show_gc_timer(struct device
*d
, struct device_attribute
*attr
,
258 struct net_bridge
*br
= to_bridge(d
);
259 return sprintf(buf
, "%ld\n", br_timer_value(&br
->gc_timer
));
261 static DEVICE_ATTR(gc_timer
, S_IRUGO
, show_gc_timer
, NULL
);
263 static ssize_t
show_group_addr(struct device
*d
,
264 struct device_attribute
*attr
, char *buf
)
266 struct net_bridge
*br
= to_bridge(d
);
267 return sprintf(buf
, "%x:%x:%x:%x:%x:%x\n",
268 br
->group_addr
[0], br
->group_addr
[1],
269 br
->group_addr
[2], br
->group_addr
[3],
270 br
->group_addr
[4], br
->group_addr
[5]);
273 static ssize_t
store_group_addr(struct device
*d
,
274 struct device_attribute
*attr
,
275 const char *buf
, size_t len
)
277 struct net_bridge
*br
= to_bridge(d
);
278 unsigned new_addr
[6];
281 if (!capable(CAP_NET_ADMIN
))
284 if (sscanf(buf
, "%x:%x:%x:%x:%x:%x",
285 &new_addr
[0], &new_addr
[1], &new_addr
[2],
286 &new_addr
[3], &new_addr
[4], &new_addr
[5]) != 6)
289 /* Must be 01:80:c2:00:00:0X */
290 for (i
= 0; i
< 5; i
++)
291 if (new_addr
[i
] != br_group_address
[i
])
294 if (new_addr
[5] & ~0xf)
297 if (new_addr
[5] == 1 /* 802.3x Pause address */
298 || new_addr
[5] == 2 /* 802.3ad Slow protocols */
299 || new_addr
[5] == 3) /* 802.1X PAE address */
302 spin_lock_bh(&br
->lock
);
303 for (i
= 0; i
< 6; i
++)
304 br
->group_addr
[i
] = new_addr
[i
];
305 spin_unlock_bh(&br
->lock
);
309 static DEVICE_ATTR(group_addr
, S_IRUGO
| S_IWUSR
,
310 show_group_addr
, store_group_addr
);
313 static struct attribute
*bridge_attrs
[] = {
314 &dev_attr_forward_delay
.attr
,
315 &dev_attr_hello_time
.attr
,
316 &dev_attr_max_age
.attr
,
317 &dev_attr_ageing_time
.attr
,
318 &dev_attr_stp_state
.attr
,
319 &dev_attr_priority
.attr
,
320 &dev_attr_bridge_id
.attr
,
321 &dev_attr_root_id
.attr
,
322 &dev_attr_root_path_cost
.attr
,
323 &dev_attr_root_port
.attr
,
324 &dev_attr_topology_change
.attr
,
325 &dev_attr_topology_change_detected
.attr
,
326 &dev_attr_hello_timer
.attr
,
327 &dev_attr_tcn_timer
.attr
,
328 &dev_attr_topology_change_timer
.attr
,
329 &dev_attr_gc_timer
.attr
,
330 &dev_attr_group_addr
.attr
,
334 static struct attribute_group bridge_group
= {
335 .name
= SYSFS_BRIDGE_ATTR
,
336 .attrs
= bridge_attrs
,
340 * Export the forwarding information table as a binary file
341 * The records are struct __fdb_entry.
343 * Returns the number of bytes read.
345 static ssize_t
brforward_read(struct kobject
*kobj
, char *buf
,
346 loff_t off
, size_t count
)
348 struct device
*dev
= to_dev(kobj
);
349 struct net_bridge
*br
= to_bridge(dev
);
352 /* must read whole records */
353 if (off
% sizeof(struct __fdb_entry
) != 0)
356 n
= br_fdb_fillbuf(br
, buf
,
357 count
/ sizeof(struct __fdb_entry
),
358 off
/ sizeof(struct __fdb_entry
));
361 n
*= sizeof(struct __fdb_entry
);
366 static struct bin_attribute bridge_forward
= {
367 .attr
= { .name
= SYSFS_BRIDGE_FDB
,
369 .owner
= THIS_MODULE
, },
370 .read
= brforward_read
,
374 * Add entries in sysfs onto the existing network class device
376 * Adds a attribute group "bridge" containing tuning parameters.
377 * Binary attribute containing the forward table
378 * Sub directory to hold links to interfaces.
380 * Note: the ifobj exists only to be a subdirectory
381 * to hold links. The ifobj exists in same data structure
382 * as it's parent the bridge so reference counting works.
384 int br_sysfs_addbr(struct net_device
*dev
)
386 struct kobject
*brobj
= &dev
->dev
.kobj
;
387 struct net_bridge
*br
= netdev_priv(dev
);
390 err
= sysfs_create_group(brobj
, &bridge_group
);
392 pr_info("%s: can't create group %s/%s\n",
393 __FUNCTION__
, dev
->name
, bridge_group
.name
);
397 err
= sysfs_create_bin_file(brobj
, &bridge_forward
);
399 pr_info("%s: can't create attribute file %s/%s\n",
400 __FUNCTION__
, dev
->name
, bridge_forward
.attr
.name
);
405 kobject_set_name(&br
->ifobj
, SYSFS_BRIDGE_PORT_SUBDIR
);
406 br
->ifobj
.ktype
= NULL
;
407 br
->ifobj
.kset
= NULL
;
408 br
->ifobj
.parent
= brobj
;
410 err
= kobject_register(&br
->ifobj
);
412 pr_info("%s: can't add kobject (directory) %s/%s\n",
413 __FUNCTION__
, dev
->name
, br
->ifobj
.name
);
418 sysfs_remove_bin_file(&dev
->dev
.kobj
, &bridge_forward
);
420 sysfs_remove_group(&dev
->dev
.kobj
, &bridge_group
);
426 void br_sysfs_delbr(struct net_device
*dev
)
428 struct kobject
*kobj
= &dev
->dev
.kobj
;
429 struct net_bridge
*br
= netdev_priv(dev
);
431 kobject_unregister(&br
->ifobj
);
432 sysfs_remove_bin_file(kobj
, &bridge_forward
);
433 sysfs_remove_group(kobj
, &bridge_group
);